Wear resistant buffer bed flame retardant buffer bed belt buffer bed impact resistance manufacturer's price

  Brief introduction the buffer bed is mainly used to replace the buffer idler
The buffer bed is composed of buffer strips
The buffer strips mainly use excellent high elastic special rubber layer to fully and effectively absorb the impact force when the material falls, greatly reduce the impact on the conveyor belt when the material falls, and truly improve the stress condition at the blanking point
The special UHMW high molecular polyethylene surface is used to minimize the friction coefficient between the conveyor belt and the buffer strip, and has good wear resistance
The use of the buffer bed ensures the face-to-face contact of the conveyor belt and uniform stress, effectively prevents the longitudinal tearing of the belt caused by the breakage and falling off of the idler, and greatly reduces the probability of longitudinal tearing after the belt is penetrated by sharp tools or sharp materials
Use advantages 1 The surface contact between the buffer strip and the conveyor belt effectively prevents damage to the conveyor belt
2
the conveyor belt is stressed evenly at the blanking port, which greatly reduces the daily repair and maintenance costs
3
effectively eliminate material splash and leakage caused by uneven stress of conveyor belt
4
  The smooth surface of UHMWPE minimizes the friction of the conveyor belt during operation
5
the curved design on the surface of the polyethylene layer ensures the smooth and smooth operation of the conveyor belt
6
the ultra-high elastic special rubber layer can absorb the impact of materials to the greatest extent
7
all parts of the buffer strip are connected by hot vulcanization process, which is compact and firm
8
the design of the bottom steel structure makes the disassembly and assembly convenient and fast
The advantages of the buffer bed in all aspects determine that it must be the development trend of the traditional idler support

Application 1 High drop blanking point buffer

2
uneven blanking buffer

3
high density blanking buffer

4
the sealing of the blanking area (to prevent overflow) is improved

The buffer bed is a substitute for the buffer idler
It can absorb the impact, prevent the belt from tearing, slow down the impact and damage of materials to the belt, avoid the tearing and scratching of the belt by sharp objects, and prevent the overflow and scattering of materials
Development history the buffer bed and buffer strip originated in Germany and were invented by German engineers in order to reduce energy consumption and improve material transportation efficiency
At first, there were many design styles of the buffer bed and buffer strip
In the 1970s, the connection structure was mainly aluminum alloy connection, and the length can be continuously adjusted
However, with the actual application and the demand of underground mining, the connection structure was gradually replaced by steel structure, In practical application, the German engineers found that the aluminum alloy is not strong in rigidity, and the buffer strip often moves, which leads to the tearing of the conveyor belt
The most important thing is that the aluminum alloy material is forbidden to be used underground all over the world
Any use of aluminum alloy connection structure underground has potential safety hazards
Therefore, since 1990, the German engineers have adopted the steel structure connection method
According to the development of decades, It is found that the length has been basically fixed at 12201500, which more scientifically meets the requirements of material falling mode and practical application, and the structure has been gradually determined

The use of buffer beds and buffer strips in China is also in the near future
There are many manufacturers of buffer strips in China, but most of them follow the design method and construction mode of German companies in the 1970s, which has fallen behind the international design, causing great losses to enterprises and direct users
Therefore, customers should be cautious in choosing

Disadvantages: instead of the traditional buffer idler, the buffer idler is mainly used before the blanking buffer bed is used, which has been used for decades
However, the problems such as the tearing of the conveyor belt, the loose sealing of the blanking port, and the falling and stacking of materials have been bothering the users, resulting in a great waste of production capacity and increasing the labor cost
Falling material accumulation material accumulation and longitudinal tearing of the conveyor belt are disadvantages of the traditional idler support

1
The supporting idler has poor buffer capacity, which can not well absorb the strong impact of material falling, and is easy to break the supporting idler, resulting in the hidden danger of longitudinal belt tearing

2
The backup idler is easy to fall off due to frequent impact of materials, and the vertical support seat of the backup roller is easy to hang or tear the belt

3
The supporting idler is in line contact with the conveyor belt, and the two rollers are suspended
It is easy for materials and other sharp hard objects to penetrate the belt between the two idlers and get stuck between the idler and the blanking port, resulting in longitudinal belt tearing

4
The belt between the two rollers is easy to sag, making the belt in the blanking port section wavy, making the sealing of the blanking port poor, resulting in material scattering and environmental pollution

5
The surface of the supporting idler is inelastic, and it is easy to adhere materials to the surface after long-time operation, which will wear the belt, and even cause the belt to deviate

6
The rotating bearing of the supporting idler is impacted for a long time, and the sealing of the bearing is easy to fail, resulting in inflexible or no rotation of the roller body and wearing the belt surface

For this reason, many international engineering design companies have successively designed different material buffer devices to improve the material buffer
Finally, the buffer bed invented by German engineers has been recognized by customers and adopted by the world after gradual improvement The international general structure of the buffer strip is composed of three parts: ultra-high molecular weight polyethylene plate + elastic rubber + steel pole
This structure is finally determined after a long time of design and application adjustment
This structure is a more general structure in the world
Due to the backward technology in the domestic market, there are few manufacturers who can produce this structure, Through the following technical analysis and practical cases, we can well understand this problem

Principle of buffer bed surface structure domestic manufacturers choose materials that are not in direct contact with the conveyor belt
Three methods are mainly used: ultra-high molecular weight polyethylene plate, polyurethane and ceramics
The ceramic has good wear resistance, but the friction coefficient is particularly high, which is easy to cause the conveyor belt to scratch, heat up and smoke
The harm is great
The ceramic sheet itself is suitable for wrapping rubber on the conveyor belt driven roller in muddy environment
The manufacturers who choose this surface material basically do not know   The use environment and conditions of the buffer strip are made blindly
Polyurethane has good bonding performance and low requirements for bonding technology, but the material is easy to hydrolyze and has poor impact resistance
It is still prone to delamination after long-term use
Ultra high molecular weight polyethylene (UHMWPE) has the lowest friction coefficient and excellent self-lubricating performance, which is conducive to the passage of the conveyor belt
It is very suitable for the surface material of the buffer strip under bad working conditions
However, it has high requirements for the manufacturer's process, and it is not difficult to combine the rubber strip without special treatment

Characteristics of UHMWPE sheet
1
It has high wear resistance
Its wear resistance ranks among the top of plastic, which is 4 times higher than nylon-66, 9 times higher than HDPE and HPVC, 9 times higher than stainless steel compared with non-metal, and the wear resistance rate under erosion environment is about 20 times that of A3 steel;
2
High impact resistance, the impact strength is 2 times that of PC, 5 times that of ABS, and about 8 times that of POM and PBT;
3
It has high self-lubricating property and low friction coefficient, about 0
05-0
11, which is comparable to that of polytetrafluoroethylene and better than that of steel and copper with lubricating oil
Under the condition of water lubrication, the dynamic friction coefficient of UHMW-PE is half lower than that of PA-66 and POM;
4
Excellent non water absorption, the water absorption of UHMW-PE is low, 0
01%, only 0
1% of PA-6;
5
Excellent non stickiness, which indicates that the adsorption force is very weak, and its anti stickiness ability is second only to PTEF with the best non stickiness in plastics, so the product surface is not easy to bond with other materials;
6
Excellent chemical corrosion resistance, resistant to various corrosive media (acid, alkali, salt) and organic media within a certain temperature and concentration range; The surface of the buffer strip with polyurethane as the wear-resistant layer fell off after two weeks
The high friction of the ceramic wear-resistant layer on site led to the scratch, heat and smoke of the conveyor belt
The ceramic wear-resistant layer led to the scratch, heat and smoke of the conveyor belt

When the rubber elastomer buffer strip is impacted, it mainly plays a good role in buffering through its own physical elasticity through elastic substances
Therefore, the rubber elasticity must meet certain conditions
The rubber elasticity used for the buffer strip in the world is about 55 degrees shore hardness
The rubber must also have certain corrosion resistance (if the rubber used underground must be treated flame retardant rubber), and have certain tear resistance and tensile strength, Elongation at break and adhesive strength of rubber non-metallic profiles are also the assessment standards
Therefore, when selecting manufacturers, it is best to select manufacturers with inspection and experimental equipment capabilities
Through comparative experiments with domestic manufacturers, it is found that some enterprises publicize good performance indicators, but the most basic rubber hardness has not been reached
After testing, the hardness of some manufacturers is about 70 degrees, which can not play a material buffer role at all

How to bond the three materials with different properties together is one of the difficulties that perplex manufacturers
Two bonding technologies are mainly used in China, i
e
thermal vulcanization bonding technology and condition bonding technology
However, condition bonding technology can not fundamentally solve the problem, and there will be tearing of the bonding layer during long-term use
Therefore, thermal vulcanization technology is the key to solve the problem

The metal framework can be roughly divided into two ways to fix the buffer strip non buffer bed frame in the world or in China
One is the steel hook, and the other is the aluminum alloy connecting frame hook
The steel structure is durable, non deformable and easy to fix
It will gradually replace the aluminum alloy structure
In terms of the scope of use, the steel pole can be used both underground and underground, but the aluminum alloy structure, Both China and the world prohibit the use of this kind of connecting mechanism underground
Therefore, any company claiming that the aluminum alloy structure can be used underground and issuing relevant flame retardant certificates is cheating consumers
In the domestic market, it is not that the manufacturer is unwilling to adopt this steel pole structure, but that there is no such technology
From the point of view of the connection structure, this connection method has high requirements on the bonding performance of the rubber non steel pole, so a special hot vulcanization bonding technology (different from the general bonding method) must be adopted

There are many ways to design the frame of the buffer bed
The same design frame can be used for a plant and the same working conditions
However, for different working conditions, certain corresponding adjustments should be made to adapt to the normal use of such working conditions
Therefore, before purchasing, it is necessary to make a comprehensive and detailed understanding of the working conditions of the customer, and make certain adjustments according to the actual situation to better adapt to their use conditions
Generally, manufacturers with construction experience will present a questionnaire according to the actual working conditions of customers
According to the questionnaire, the production can be designed and adjusted to better meet the actual needs of customers
Note 1: the explanation of coal safety sign for prohibiting the use of metal aluminum underground
The chemical property of aluminum is active, and it is easy to avoid oxygen oxidation reaction in air
As the underground coal mine is humid and often contains acid gas, the use of aluminum electrode in the underground coal mine will further aggravate the oxidation rate of aluminum, so that the products are corroded and cannot be replaced frequently, and electrical accidents may be caused due to corrosion, resulting in heavy losses
Due to the large expansion coefficient of aluminum, the links of the product are very easy to loosen after heating, oxidation or even decomposition and fracture, which seriously threatens personal safety
If electric spark is caused, gas and coal dust explosion accident may be caused
Therefore, article 467 of the coal mine safety regulations stipulates that it is strictly prohibited to use aluminum electrodes in coal mines
China has never issued safety signs for aluminum pole products of any model and specification
Aluminum pole products used in coal mines should be eliminated immediately