Manufacturer's direct selling buffer bed

  1
introduction to buffer bed:
At the beginning of the design, the buffer bed is mainly used to replace the buffer idler and protect the conveyor belt
It is mainly composed of buffer strips
The buffer bed is designed to protect the conveyor belt and play the role of material buffer
It mainly plays the triple buffer purpose through buffer strips, structure and design
The buffer strip mainly uses the excellent high elastic special rubber layer to fully and effectively absorb the impact force when the material falls, greatly reducing the impact on the conveyor belt when the material falls, and truly improving 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

2
also known as buffer chute and buffer supporting bed:
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

Advantages of buffer bed
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

Recommended applications:
1
buffer at high drop point
　　
2
uneven blanking buffer
　　
3
high density blanking buffer
　　
4
the sealing of the blanking area (to prevent overflow) is improved
　　
Development history of buffer bed
The buffer bed and buffer strip originated in Germany and were invented by German engineers in order to reduce energy consumption and improve material conveying efficiency
At first, there were many design styles of buffer bed and buffer strip
In the 1970s, the connection structure was mainly aluminum alloy connection, and the length can also be continuously adjusted
However, with the practical application and the demand of underground mining, the connection structure was gradually replaced by steel structure
In practical application, German engineers found that, 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 aluminum alloy materials are forbidden to be used underground all over the world
Any use of aluminum alloy connection structure underground has potential safety hazards
Therefore, since 1990, German engineers have adopted the steel connection method
According to decades of development, they found that the length has been basically fixed at 12201500, These two lengths more scientifically meet the requirements of material falling mode and practical application, and the structure has been gradually determined
The style, structure and material of the buffer bed are mainly determined by the actual material buffer impact force and the belt conveyor frame
Different working conditions and conditions are not only the same, but also better in China, such as Rita rubber
In short, the design style and actual situation of the buffer bed should be determined according to the specific use conditions

3
composition principle of buffer strip:
(1) 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 manufacturer who chose this surface material basically did not understand the use environment and conditions of the buffer strip and made it 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

(2) Rubber elastomer
When the buffer strip is impacted, it mainly plays a good role in buffering through its own physical elasticity through elastic materials
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

(3) Bonding technology
How to bond the three materials with different properties together is one of the difficulties perplexing manufacturers
At present, two bonding technologies are mainly used in China, namely, hot vulcanization bonding technology and condition bonding
However, condition bonding technology can not fundamentally solve the problem, and there will be tearing of the bonding layer during long-term use
Therefore, hot vulcanization technology is the key to solve the problem

(4) Metal skeleton
There are two ways to fix the buffer bed frame, one is steel hook, the other is aluminum alloy connecting frame hook
Aluminum alloy structure is an early connecting structure
Because it does not adapt to the impact requirements of oblique cutting force, it is easy to cause problems such as buffer strip channeling or weak fixation, so it can not be used underground
Therefore, this structure has been phased out in Europe and America

4
design:
The design principle of the buffer bed is basically the same, but the styles are different
It is mainly determined according to the actual use conditions and working conditions of the customer
The professional buffer bed designer and manufacturer will design according to various factors, such as the blanking height, and select the material and structure through the impact force

5
shape:
The general thickness of the wear-resistant layer is 12
5mm and 25mm (the thickness can be selected according to the needs of customers)
For the working condition that the belt speed is greater than 4
5m/s, the 25mm ultra-high polymer wear-resistant layer is selected
Note: for some working conditions with high explosion-proof requirements, fast belt speed and fast wear, 9
2 million ultra-high polymer wear-resistant layer (9
2 million flame retardant buffer strip wear-resistant layer is imported from Germany) shall be selected

In fact, the wear-resistant layer mainly refers to the ultra-high molecular weight polyethylene plate
Its molecular weight affects the expiration performance
Different molecular weights affect the wear-resistant performance and impact resistance
A suitable molecular weight will also affect the performance of the buffer strip
For the flame-retardant and antistatic buffer strip, Rita adopts a specific material suitable for downhole use, which is different from ordinary manufacturers, so its quality is good