What are the advantages of fresh air ventilator

发表于 2012/05/19 由 admin

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What are the advantages of fresh air ventilator?
     Jaco produced fresh air ventilator, heat recovery fresh air ventilator, also known as a fresh air heat exchanger. The advent of fresh air heat exchanger and promote both solve the problem of the fresh air of the air-conditioned indoor air-conditioned environment heat recovery, to make up for the deficiencies of the air conditioner. The fresh air heat exchangers and air conditioners used in conjunction with, the better.
1, cold, thermal comfort, indoor led air circulation, at the same time form a constant humidity in the indoor space, physical and mental health;
2, the device uses the exclusive development of negative ion generator, while the outdoor air through the device filter out dust and other pollutants in the air, the fresh, clean air to the indoor. Indoor air pollution that we face has been completely resolved;
3, the oxygen content of air-conditioning environment, the timely replenishment of fresh outdoor air, eliminating the air-conditioned environment caused by a variety air conditioning disease;
4, the heat recovery problem is resolved. Equipment exclusive development of highly efficient heat exchanger cores is a heat recovery up to 75%, thus putting an end when the air conditioning can not open the window ventilation concerns. Thus energy-saving, energy saving, to provide economic, clean, sufficient quantities of fresh air.

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The importance of increased child seats pad Assessment

发表于 2012/05/16 由 admin

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 From the World Health Organization data show that traffic accidents have become the children\\ s cause of death after diseases of which the important point is that children in the car did not master the correct way. Overseas of a National Roads (Swedish RoadAdminstration) Automotive Safety Commissioner AndersLie tells us that before the age of four infant car should be sitting to the type of child seat, slightly larger than some of the children should use booster cushion until the height reached 140 cm, the age of at least 10 years of age.
Increased pad role is to let the children to increase the seat height so that the seat belt tied in the correct position, did not install the seat belts increased pad generally tied to a place close to the child\\ s neck to bring great harm to the child safety!
     Sweden in 1982 began to require children under 7 years traveling the car should be equipped with devices to keep children safe. Canada, the provisions of body weight in children under 18 kg, must sit in child safety seats when traveling. New Zealand\\ s requirements under 5 years old children must use the appropriate child safety seat. United Kingdom September 18, 2006 by law, require children under 3 years, 3 to 12 years or less than 135 cm children must use child safety seats or booster seats in the car. National provisions are not the same age, and China\\ s related laws and regulations, constraints, mainly to rely on parents. However, for safety reasons, the best should seat child safety seat before the age of 12. The following describes the importance and use of child booster cushion.
Increased pad install lap and shoulder seat belts perform better, provide better protection for children aged 4-8 years in the collision. Therefore, parents do not bother to study how to provide good for their children and car safety belt installation. However, most of the fixed seat belts increased pad does not provide for all vehicles has always been a good seat belt installation.
     The researchers evaluated 72 increased the cushion of the seat belt installation, set the best elevated pad (top rating) to win the BEST BET or GOOD The BET increased because of this increased pad on most vehicles are correctly fixed to use the pad age children in seat belts. Increased cushion the worst U.S. Highway Safety Insurance Association is not recommended, because of their poor performance in the installation of seat belts. Good increased across the pad will make lap belts from the top of the thigh of the child, and the shoulder belt anchorages in the middle of the shoulder. The U.S. Highway Safety Insurance Association does not conduct crash tests to assess the increased pad their concerns on the installation of seat belts, rather than the collision performance.
\"The first time, the top increased the number of pad more than the U.S. Highway Safety Insurance Association does not recommend increased pad,\" said Anne McCartt, senior vice president of the Association is responsible for. \"Now, more and more car manufacturers are concerned about the installation of seat belts, which is clearly visible from our ratings.\"
21 increased pad BEST The BET type 7 GOOD BET type, 8 of the Insurance Association of the U.S. highway safety will not recommend the type. This represents a market shift, the last year, the U.S. Highway Safety Insurance Institute for Assessment of 60 increased pad 9 has won the BEST The BET rating.
The share occupied by the poor performance of the increased pad in the assessment of this year increased pad small, but 36 increased pad in the middle rating, because in most of the cars, trucks and SUV models can not always well to install seat belts. These increased in most of the pad is increased pad back, can provide a good lap seat belt installation, but can not provide a good shoulder belts installed.
How to assess the increased pad: U.S. Highway Safety Insurance Institute engineers use an average age of a 6-year-old dummy crash test pad on the increased assessment. They assessed cover all seat belts constructed four kinds of circumstances, the three-point lap and shoulder belts in all types of vehicles is how to dummy fixed in each increased pad. Increased to cushion the overall rating is derived based on the sum of the various assessment score.
 \"Consumers do not buy for each family cars increased pad. Some of the increased pad may be very good, but parents still need to experiment with increased pad, take a look at the lap and shoulder seat belt installation is very suitable for their children. \"McCartt said.
Increased pad installation is very important: there is not any federal standards require increased pad how fixed seat belt. The government\\ s collision performance of dynamic tests can not measure the increased pad performance, the U.S. National Highway Traffic Safety Administration only by how easy it is to use for increased pad rating.
      Backrest increased pad
In 2008, the U.S. Highway Safety Insurance Association began to assess the increased pad to help select the appropriate increased pad rather than guesswork. Since then, some car manufacturers of the association test programs and fixtures for child booster seats to help assess that they are designing new high-cushion seat belt installation. Britax Child Safety Corporation is one of them. This company located in North Carolina this year, The BET (Britax Frontier 85) rating, and one of one the BEST GOOD of BET (Britax Parkway, SG) rating. \"These programs confirmed that our child booster seats is designed for the layout of the seat belt and installation optimization is priceless,\" Britax Child Safety, the company said.
     No backrest increased pad
Increased pad are mainly two types: high backrest and backrest. Some of the high back of increased pad can be used in two ways, remove the backrest will be transformed into the backrest increased pad. These two rating increased pad, a model, because the installation of seat belts will vary due to the different modes.
Increased high backrest pad shoulder and lap safety belt built-in boot across the path of the body, and can provide some support for the head. Type without backrest increased pad lap seat belt guide, but in many models, parents may need to use a plastic clip to properly secured the position of the shoulder belts.

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Tower crane cycloid reducer repair method

发表于 2012/05/15 由 admin

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QT16 tower crane use nine years later, in the construction process, the sudden appearance of the tower rotation of the fault, the disintegration of maintenance reducer, the second stage of the reducer on the cycloid, multiple cracks, wear and swap block situation. Stock spare parts, repair welding repair method.
    A. Solderability analysis
    Cycloid reducer cycloid made of GCr15, its high carbon content, hardened tendency of large, easy cracks and S, P segregation, hot tearing sensitivity of large, poor weldability.
    Two. Welding measures
    (L) the elimination of the crack to first eliminate the crack shape, depth and length of different grinders and light short cracks, after elimination of the deep crack. The grinding sequence is the start until the crack from the crack ends to eliminate, to prevent the spread of the crack and grind groove. Not crack through the cracks, so that the bottom of the groove smooth transition, to reduce the stress concentration; crack through the cracks open a single V-shaped groove.
    (2) welding process will cleft through the cracks correction to the surface in a plane, a fixed spot. Welding sequence to weld a short and shallow cracks, and then welding the crack through the cracks, and finally the defect site surfacing to the original shape.
    Attention to start with the crack tail arc welding short and shallow cracks, cracks, to prevent the welding process, welding point by point, side solder side of the observation. Welding observed by the first crack, the crack phenomenon, no new cracks to prove feasible welding processes.
    Welding the crack through the crack, the back of welding must be thoroughly cleaned root wheel machine, revealing a metallic luster.
For the wear, the defect site should first remove the oil, rust repair welding.
    (3) welding parameters due to the parts requirements of good wear resistance, high precision, but poor weldability, so the choice of crack resistance, wear stainless steel electrode machining performance is acceptable as a filling material. The grade for the A307, Specification for ¢ 3.22mm, heated to 350 ° C the 2h baking, welding current 90-l00A, welding voltage 20-22V, welding line energy 8-12kJ/cm. Welder for the AX-320, reverse.
    (4) the entire part after welding welding, insulation and slow cooling, after cooling to room temperature lathe two planes, the edge of excess deposited metal finishing with a file until the cycloid back to the original geometric dimensions.
    3. Effect
    Cycloid self-healing has been more than five years, good performance, fully meet the requirements, saving maintenance costs.

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What are the differences between modular air handling units with the original product

发表于 2012/05/15 由 admin

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 Multi-partition given that the main difference is that modular air handling units air volume air handling units and are commonly used today:
  . The ① blower segments pressure within the cold heating section and steam upstream of the humidification section located in the table out unit.
    ② between cold-heater in the blower and table set aside through the shunt. Air parameters in the shunt by a mixture of return air and fresh air the eve of the two air volume ratio.
    ③ After the cooled or heated humidification of air by the number of partitions into the slip, if one thousand. Them in different proportions and part of the bypass air mixing J resulting in a number of different temperature airflow Fen Do not answer to each partition of air conditioning. Each group mixed send damper to adjust the opening in proportion to the temperature sensing signal by the sub-region.
    The ④ random group equipped with electrical, instrument integration, automatic control device according to the different partitions of the actual temperature of the gall to assume automatically adjust the air valve opening degree, the cold (hot) media valve opening, the humidifier steam wide open and close, the fan speed change start and stop the automatic control and other functions.

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Seven skills of expert analytical Volvo excavator

发表于 2012/05/15 由 admin

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Volvo excavator tips, give you a brief introduction:
One, use the skills of the Volvo excavator operating techniques
   First make sure that the surrounding conditions. Rotation operations on the surrounding obstacles, terrain to do a pretty good idea for safe operation; operation, to confirm the direction of the front and rear of the crawler to avoid tipping or impact; try not to make the final drive to the face of mining direction, otherwise easy to damage the walk
Two Volvo excavators use techniques of effective mining method
   When the bucket cylinder and linkage, interaction between the stick cylinder and stick 90 degrees; digging force and bucket teeth and ground to maintain a 30 degree angle, the best of the digging force and cut soil resistance; with bucket should ensure that the digging of the rod, the Stick angle range between 45 degree angle from the front to the back 30 degrees.
Boom and bucket, can improve the efficiency of mining.
Motors or hoses; about tracked with ground operations, to ensure full contact and improve the dynamic stability of the machine.
Third, the Volvo excavator tips loading operations
   The body should be in the horizontal stabilizer position, or rotation uninstall difficult to accurately control, thus extending the operating cycle time; body and trucks to maintain a proper distance, to prevent the body tail and truck collide in 180-degree rotation; as much as possible on the left rotary mounted, so that vision to do, high efficiency, is necessary to correctly grasp the angle of rotation in order to reduce the time for rotation; truck location of forest is lower than the excavator to shorten the boom rise time, and a good line of sight; first load of sand, gravel, placement of large rocks, thus reducing the impact of the trunk.
Fourth, the Volvo excavator to use the techniques of mining rock
   Bucket Digging the rock would have the machine to cause greater damage due to avoid; must be excavated, should be based on the rock of crack direction to adjust the position of the body, so that the bucket smoothly shovel into the excavation; bucket teeth into the rock cracks , into the arm and bucket digging force
The mining (should be mindful of the bucket teeth slippage); not fragmentation of the rock should be broken and then use the bucket digging.
Volvo excavator tips of lifting operations
   Lifting operation into acting hydraulic excavator, you should confirm the lifting around the site conditions, the use of high-strength hanging hook and wire rope, lifting to try to use a special lifting device; practices should be selected micro mode of operation, the action to slow balance; sling appropriate length, too long causes the hanging objects to swing large and difficult to accurately control; is necessary to correctly adjust the bucket position to prevent the slippage of the steel cord; construction personnel so as not to close to the hoisting material, to prevent the risk of improper operation.
Six, Volvo excavators use the skills of the soft patch or water operations
   In soft soil with a job, be aware of the soil loose real extent, and pay attention to the limit bucket of the excavation area to prevent the occurrence of landslides, landslides and other accidents and deep body subsidence. Operating in the water, you should pay attention to the body to allow the water depth range (the water should be to shore up the sprocket center below); If the water level is higher, within the slewing ring due to the entry of water lead to poor lubrication, the engine fan blades hit by the water lead to fold damage, electrical wiring and components due to water invasion
Into a short circuit or open circuit.
Seven Volvo excavator to use the skills of the slope smooth operation
   Flat trim should be the machine flat on the floor to prevent the body to shake, to grasp the boom and dipper stick of motor coordination, control the speed of both is essential for flat finishing.

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Inspection and repair of the forklift axle What are the requirements

发表于 2012/05/14 由 admin

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Axle inspection and repair requirements are: 1 semi-bearing bending is not greater than 0.5mm, if greater than should be carried out cold press correction. 2 axle flange plane and perpendicular to the axis. Its round beating the test, through axle inspection and repair requirements are:
1 semi-bearing bent is not greater than 0.5mm greater than, the cold press correction.
2 axle flange plane and perpendicular to the axis. Its round beating the test, usually on a lathe with a dial indicator against the plane on the edge of the flange within the measurement. Such as circular run-out error is greater than 0.15mm, you should grind the flange plane correction.
3 axle key tooth wear, with the gap greater than 0.75mm keyway in the axle gear or axle key tooth skew than 1mm should be replaced.
4 axle key tooth wear is greater than 0.2mm, Surfacing. Can also take partial replacement excavator fork.

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Tower crane cycloid reducer repair method

发表于 2012/05/13 由 admin

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QT16 tower crane use nine years later, in the construction process, the sudden appearance of the tower rotation of the fault, the disintegration of maintenance reducer, the second stage of the reducer on the cycloid, multiple cracks, wear and swap block situation. Stock spare parts, repair welding repair method.
    A. Solderability analysis
    Cycloid reducer cycloid made of GCr15, its high carbon content, hardened tendency of large, easy cracks and S, P segregation, hot tearing sensitivity of large, poor weldability.
    Two. Welding measures
    (L) the elimination of the crack to first eliminate the crack shape, depth and length of different grinders and light short cracks, after elimination of the deep crack. The grinding sequence is the start until the crack from the crack ends to eliminate, to prevent the spread of the crack and grind groove. Not crack through the cracks, so that the bottom of the groove smooth transition, to reduce the stress concentration; crack through the cracks open a single V-shaped groove.
    (2) welding process will cleft through the cracks correction to the surface in a plane, a fixed spot. Welding sequence to weld a short and shallow cracks, and then welding the crack through the cracks, and finally the defect site surfacing to the original shape.
    Attention to start with the crack tail arc welding short and shallow cracks, cracks, to prevent the welding process, welding point by point, side solder side of the observation. Welding observed by the first crack, the crack phenomenon, no new cracks to prove feasible welding processes.
    Welding the crack through the crack, the back of welding must be thoroughly cleaned root wheel machine, revealing a metallic luster.
For the wear, the defect site should first remove the oil, rust repair welding.
    (3) welding parameters due to the parts requirements of good wear resistance, high precision, but poor weldability, so the choice of crack resistance, wear stainless steel electrode machining performance is acceptable as a filling material. The grade for the A307, Specification for ¢ 3.22mm, heated to 350 ° C the 2h baking, welding current 90-l00A, welding voltage 20-22V, welding line energy 8-12kJ/cm. Welder for the AX-320, reverse.
    (4) the entire part after welding welding, insulation and slow cooling, after cooling to room temperature lathe two planes, the edge of excess deposited metal finishing with a file until the cycloid back to the original geometric dimensions.
    3. Effect
    Cycloid self-healing has been more than five years, good performance, fully meet the requirements, saving maintenance costs.

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Chinese Academy of Sciences recently waste beverage bottles to produce polyester polyols

发表于 2012/05/08 由 admin

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Recently, the Chinese Academy of Sciences, Lanzhou Institute of Physical and Chemical Technology, has introduced a new technology for a production of polyester polyols. The technology can be abandoned industrial and domestic mineral drinking water bottles, drink bottles, cooking oil barrels and polyester plant waste, polyester products, scrap, waste material

Made of chemically treated materials, chemicals and catalyst in organic alcohols, polyester polyols, the intermediates used for production of polyurethane foam material, as well as plastics, rubber, coatings, adhesives and other synthetic materials.
Compared with the wide range of applications currently on the market polyether polyols, polyester polyols in heat resistance, abrasion resistance, oil resistance and mechanical strength advantage, so in the polyurethane foam material, synthetic leather, paints, adhesives, elastomers display its properties and other products

To be developed. Especially polyester polyols, polyether-based polyurethane rigid foam materials in recent years, a large number of applications, adding a certain percentage is much higher than the strength of the material, thereby significantly reducing the cost of production of rigid polyurethane foam material; polyester hair bubble materials

Small thermal conductivity, excellent thermal insulation properties, is currently widely used in pipe insulation and building insulation.

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The gas valves hidden to remember the simplicity

发表于 2012/05/08 由 admin

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Gas valve supplier – China Manufacturer
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Many people during the home improvement that the gas valve pretty to hide. Changchun Gas Co., Ltd. (hereinafter referred to as the Changchun Gas) relevant staff, incorrect placement of the gas valve will cause a safety hazard.

Riser valve, the table before the valve, stove valve can not be encapsulated or Buried. Switch, replace the gas valve needs some work space, if the package Buried gas valves, give routine maintenance and repair work to the inconvenience in the event of a gas leak need to cut off the gas supply source, package, Buried valves a result could not cut off the gas supply, can cause serious gas accident. Stove valve (commonly known as forks, single mouth) can not stove use. Located within the cabinet under the kitchen stove valve, often by the collision of the drawer, sliding, and other items can easily cause the hose off or broken leak easily cause an explosion in a relatively confined space, reaches a certain concentration case of fire. Can not be dual-fork alone. Double fork to use only one side of the home of many gas users, if not connected to the hose and stove side of the fork knob is turned on, will lead to a gas leak, causing the gas accident. Recommends that customers double fork replaced by a single mouth (Changchun Gas Service Hotline can call 96660 make an appointment to replace).

In addition, Changchun Gas remind you: run out of gas after turn off the stove valve cooker valve; Pro out every day, before going to sleep to pay attention to check the gas valve is closed. Gas maintenance, repair, temporary stop gas, you must shut down a good stove valve cooker valve, resumption of gas supply, you should check again whether the valve is turned off in order to avoid gas leakage accident.

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Gas Company issued a consumer alert

发表于 2012/05/08 由 admin

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Careful purchase a home to sell natural gas stove

With the advance of natural gas transformation, some people use the name of the replacement of natural gas, home selling gas stove, combustible gas. The face of the recent consultation and complaints of the public, City Gas Corporation said that they did not take any form of marketing products.

The cell door swing-cooker stand

"Exhibition of replacement of natural gas stove, gas company gas stove exhibition … in some residential areas in front of sets up a gas cooker stand, and even residents encounter behavior of door to door, and we see the replacement of natural gas "," gas company "and other words, always assume that the gas company to sell gas stoves, regardless of the brand to listen heard how the quality of aftermarket how the stove will be to buy home.

City Gas Corporation to remind the public: some merchants deliberately vague concept, so that the public thought it was a gas company sales stove, to win public confidence in the products, to sell the appliance, hose, valves, alarms and other products at high prices, or pretending to fuel with transformation to door service, charge the expenses of renovation, or even to sell low-quality stove and accessories, leaving hidden dangers to life and property security.

City Gas Corporation stated that they did not take any form of marketing products, Should carry out the product business, the staff will strictly follow the rules, through formal channels, to remind the majority of gas users to identify the authenticity. Anyone who has any questions can call the City Gas Company natural gas replacement gas appliance showroom phone "8070088" advisory.

Site marketing combustible gas

Recently, Mr. Liu, who lives in the west district, see the downstairs posted a notice reads: "the majority of users of gas: natural gas replacement work smoothly, so that the user reasonable and safe use of gas to avoid gas accident, I The department is scheduled for April 5 (dress uniform, wearing a work permit) site use common sense for users to promote gas safety, combustible gas can be installed in the kitchen …… looking to install to keep people in the family home, to cooperate installation. last inscription gas equipment service department, and left a telephone, but also covered the official seal. He see such a formal notice, when the Gas Company posted notice on the phone call, to know 220 dollars to install the device, call the City Gas Company phone but was told the company from require users to install this product.

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