Electric bag dust collector

Abstract

The invention relates to an electric bag dust collector which comprises a dust hopper, a gasification plate assembly and an elastic deformation column bag, the gasification plate assembly is mounted on the outer wall of the ash bucket and is used for guiding external compressed air to be injected into the ash bucket; a first control valve and a second control valve are respectively mounted on two side walls, far away from each other, of the ash bucket; the two ends of the elastic deformation column bag are connected to the first control valve and the second control valve correspondingly. The first control valve is used for controlling external compressed air to be introduced into the elastic deformation column bag so as to change the form and position of the elastic deformation column bag, and the second control valve is connected to an external negative pressure source and used for controlling air to be extracted from the elastic deformation column bag so as to form a negative pressure state. By utilizing the synergistic effect of the gasification plate assembly and the elastic deformation column bag, through flexible switching of the first control valve and the second control valve, the elastic deformation column bag is made to alternate between the expansion state and the contraction state, the effect of disintegrating hardened dust from inside and outside is achieved, and the fluidization efficiency of the hardened dust in the ash bucket is improved.

Description

Technical Field

[0001] The present application relates to the field of dust collectors, and in particular to an electric bag dust collector. Background Art

[0002] The electric bag filter is a device that combines the electric dust removal and bag dust removal technologies. It is mainly composed of an electric field area, a bag area, an ash hopper, etc. The electric field area charges and deposits the dust through a high-voltage electric field, and the bag area filters the dust through filter bags. The ash hopper is located at the bottom and is responsible for collecting the deposited dust. However, when the ash hopper heater fails, the insulation is poor, or the boiler heating surface leaks and causes the ash to become moist, the dust in the ash hopper is easy to stick together to form a "bridge" phenomenon, which hinders the discharge of dust and even causes an electric field short circuit. At present, although it can be solved by adding air cannons, gasification plates, and vibration structures on the outer wall of the ash hopper, air cannons and vibration structures are difficult to effectively handle the accumulated and compacted dust. Although the gasification plate can spray the compacted dust, its fluidization effect is difficult to penetrate the dust layer, resulting in reduced fluidization efficiency. Summary of the invention

[0003] In order to improve the fluidization efficiency of compacted dust in the ash hopper, the present application provides an electric bag dust collector.

[0004] The electric bag dust collector provided in this application adopts the following technical solution: An electric bag dust collector comprises an ash hopper, a gasification plate assembly and an elastic deformation column bag; the gasification plate assembly is installed on the outer wall of the ash hopper to guide external compressed air to spray into the interior of the ash hopper; a first control valve and a second control valve are respectively installed on the two side walls of the ash hopper which are away from each other; the two ends of the elastic deformation column bag are respectively connected to the first control valve and the second control valve, and the elastic deformation column bag is used to loosen the compacted dust in the ash hopper; the first control valve is used to control the external compressed air to pass into the elastic deformation column bag to change its shape and position, and the second control valve is connected to an external negative pressure source to control the extraction of gas from the elastic deformation column bag to form a negative pressure state.

[0005] By adopting the above technical solution, under normal working conditions, the dust in the ash hopper can be discharged smoothly, and the elastic deformation column bag remains in a compressed state. When the dust in the ash hopper is compacted and cannot be discharged normally, the gasification plate assembly starts to spray compressed air into the ash hopper, and at the same time the first control valve is opened to allow external compressed air to enter the elastic deformation column bag, causing it to gradually expand and change position, and disintegrate the compacted dust from the inside. The second control valve is connected to an external negative pressure source, which is used to extract the gas in the elastic deformation column bag when needed to form a negative pressure state. This design not only utilizes the synergistic effect of the gasification plate assembly and the elastic deformation column bag to improve the fluidization efficiency of the compacted dust, but also through the flexible switching of the first control valve and the second control valve, the elastic deformation column bag alternates between the expansion and contraction states, constantly changing the position where the compacted dust is blown, ensuring that the gasification plate assembly can not only perform initial blowing on the compacted dust, but also continuously act on the crushed dust, effectively preventing the dust from clogging the ash hopper discharge port. In addition, the continuous deformation of the elastic deformation column bag can repeatedly squeeze the dust in the fluidized state, accelerate the discharge process of the dust in the ash hopper, and thus improve the fluidization efficiency of the compacted dust in the ash hopper.

[0006] Optionally, the side wall of the elastic deformation column bag is provided with a plurality of blowing holes, and the blowing holes are used for the compressed gas in the elastic deformation bag to pass through.

[0007] By adopting the above technical solution, the effect of injecting compressed gas into the interior of the compacted dust is achieved, and the compressed gas of the gasification plate assembly is used to further improve the fluidization efficiency of the compacted dust in the ash hopper.

[0008] Optionally, the elastically deformable column bag includes a plurality of deformable bags and a plurality of rigid support rings; the plurality of deformable bags and the plurality of rigid support rings are alternately arranged in a straight line; the ends of the deformable bags are connected to the surfaces of the rigid support rings; the deformable bags at both ends of the elastically deformable column bag are respectively connected to the first control valve and the second control valve; the blowing hole is arranged on the rigid support ring; and a dustproof net is arranged on the rigid support ring at the position of the blowing hole.

[0009] By adopting the above technical solution and utilizing the structural characteristics of the rigid support ring, the rigid support ring maintains its structural state during the elastic deformation of the deformation bag, so that the blowing hole is not only protected by the dustproof net, but also reduces the risk of tearing and damage of the elastic deformation column bag at the blowing hole position during the deformation process, thereby increasing the service life of the elastic deformation column bag.

[0010] Optionally, the deformable bag between adjacent rigid support rings is arranged in a twisted shape in an initial state; when compressed air is injected into the elastic deformable column bag, the deformable bag releases the stress caused by the increase in gas pressure through rotation or twisting based on its twisted shape; and when the gas in the elastic deformable column bag is extracted by negative pressure, the deformable bag twists in the opposite direction to that during inflation to adapt to the reduction in gas pressure.

[0011] By adopting the above technical solution, utilizing the torsion setting of the deformable bag, and matching the on-off control of the first control valve and the second control valve, the elastic deformable column bag can release the stress caused by gas changes through rotation or twisting when it is inflated and expanded or contracted, so that the compressed airflow in the blowing hole can continue to change, achieving the effect of rotating and cutting the compacted dust with airflow, further quickly disintegrating the compacted dust structure inside, and accelerating the fluidization efficiency of the compacted dust.

[0012] Optionally, a cutting blade is provided on the circumferential side of the rigid support ring.

[0013] By adopting the above technical solution, when the elastic deformable column bag is inflated and expanded or deflated, the cutting blade cuts the compacted dust in a rotating posture, and with the help of the airflow from the blowing hole, the compacted dust is further broken up inside, thereby further improving the fluidization efficiency of the compacted dust.

[0014] Optionally, the cutting blade is hollow inside, and the blowing hole is located inside the cutting blade; a cutting air flow hole is provided at the end of the cutting blade away from the rigid support ring, and the cutting air flow hole is connected to the blowing hole.

[0015] By adopting the above technical solution, the clogging of the blowing holes by dust is improved, and at the same time, multiple blowing holes are used to blow the cutting air flow holes, thereby reducing the risk of clogging the cutting air flow holes and improving the fluidization effect of compressed gas on compacted dust.

[0016] Optionally, the axis of the cutting air flow hole is on the tangent of the cutting blade, so that when the compressed gas is guided to flow out of the air flow hole, the compressed gas acts along the tangent direction of the cutting blade to generate a rotational torque.

[0017] By adopting the above technical solution, the effect of the cutting blade in destroying compacted dust is improved, and the risk of compacted dust hindering the twisting of the deformation bag is reduced. When the elastic deformation column bag is twisted, the cutting blade can smoothly cut the compacted dust, thereby further improving the fluidization efficiency of the compacted dust.

[0018] Optionally, the elastically deformable column bag also includes a plurality of protective tubes, each rigid support ring corresponds to two protective tubes, and the two protective tubes are respectively installed on opposite side walls of the rigid support ring; the deformable bag is located in the protective tube, and a deformation gap is left between the opposite protective tubes.

[0019] By adopting the above technical solution and introducing the protective tube, the contact area between the deformation bag and the dust during the torsion process is reduced, thereby reducing the wear area between the compacted dust and the torsion deformation bag, increasing the service life of the deformation bag, and at the same time improving the problem of the deformation bag in a torsion state being hindered from rotating by the compacted dust.

[0020] Optionally, a plurality of the elastically deformable column bags are provided, and the plurality of the elastically deformable column bags are arranged at intervals along the height direction of the ash hopper; the first control valve and the second control valve are respectively installed at both ends of each of the elastic column bags.

[0021] By adopting the above technical scheme, the introduction of multiple elastic deformation column bags can, on the one hand, improve the efficiency of breaking up the internal compacted dust and improve the fluidization efficiency of the compacted dust. On the other hand, the elastic deformation bags at different heights can be introduced with different volumes of compressed gas, thereby realizing the advantages of different deformation amounts of the elastic deformation column bags at different heights of the ash hopper, matching the internal shape of the ash hopper, so that the compacted dust at different heights in the ash hopper can smoothly pass through the gradually narrowing ash hopper and be discharged smoothly.

[0022] Optionally, the surface of the elastically deformable column bag is provided with an elastic wear-resistant coating.

[0023] By adopting the above technical solution, the service life of the elastic deformation column bag in a harsh working environment is increased.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: By utilizing the synergistic effect of the gasification plate assembly and the elastic deformation column bag, the elastic deformation column bag breaks up the compacted dust from the inside, and the gasification plate assembly sprays compressed air into the ash hopper, thereby improving the fluidization efficiency of the compacted dust. By flexibly switching the first control valve and the second control valve, the elastic deformation column bag alternates between the expansion and contraction states, and continuously changes the position where the compacted dust is sprayed, ensuring that the gasification plate assembly can not only initially spray the compacted dust, but also continuously act on the broken dust, effectively preventing the dust from clogging the ash hopper discharge port. In addition, the continuous deformation of the elastic deformation column bag can repeatedly squeeze the dust in the fluidized state, accelerate the discharge process of the dust in the ash hopper, and thus improve the fluidization efficiency of the compacted dust in the ash hopper. By utilizing the twisting setting of the deformation bag and the on-off gas of the first control valve and the second control valve, the elastic deformation column bag can release the stress caused by the change of gas by rotating or twisting when it is inflated and contracted, so that the compressed airflow of the blowing hole can continuously change, so as to achieve the effect of rotating and cutting the compacted dust with the airflow, further quickly disintegrating the compacted dust structure inside, and accelerating the fluidization efficiency of the compacted dust; The introduction of multiple elastic deformation column bags, on the one hand, improves the efficiency of breaking up compacted dust inside and improves the fluidization efficiency of compacted dust. On the other hand, the elastic deformation bags at different heights can pass different volumes of compressed gas, thereby taking advantage of the different deformation amounts of the elastic deformation column bags at different heights of the ash hopper, matching the internal shape of the ash hopper, so that the compacted dust at different heights in the ash hopper can pass smoothly through the gradually narrowing ash hopper and be discharged smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0026] Figure 2 It is a schematic diagram of the structure of the elastic deformation column bag used to illustrate Example 1.

[0027] Figure 3 It is a schematic diagram for illustrating the structure of the gasification plate assembly of Example 1.

[0028] Figure 4 It is a schematic diagram for showing the transformation of the elastic deformation column bag and the gasification plate assembly of Example 1 before and after the introduction of compressed gas.

[0029] Figure 5 It is a schematic diagram of the structure of the elastic deformation column bag used to illustrate Example 2.

[0030] Figure 6 yes Figure 5 Enlarged view of part A.

[0031] Figure 7 It is a schematic diagram of the structure of the elastic deformation column bag used to demonstrate Example 3.

[0032] Figure 8 yes Figure 7 Enlarged view of part B.

[0033] Explanation of the accompanying drawings: 1. Shell; 2. Ash hopper; 3. Gasification plate assembly; 31. Metal shell; 32. Silicon carbide gasification plate; 33. Air duct; 4. Elastic deformation column bag; 41. Deformation bag; 42. Rigid support ring; 43. Blowing hole; 44. Protective cylinder; 5. First control valve; 6. Second control valve; 7. Dustproof net; 8. Deformation gap; 9. Cutting blade; 91. Cutting air flow hole. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-8 This application is described in further detail.

[0035] The embodiment of the present application discloses an electric bag dust collector.

[0036] Example 1, reference Figure 1 and Figure 2 An electric bag dust collector includes a shell 1, an ash hopper 2, a gasification plate assembly 3 and an elastic deformation column bag 4, wherein the shell 1 is provided with an electric dust removal area and a bag dust removal area, the ash hopper 2 is fixed on the shell 1, and the ash hopper 2 is installed below the electric dust removal area and the bag dust removal area. The gasification plate assembly 3 is installed on the outer wall of the ash hopper 2 to guide the external compressed air to spray into the ash hopper 2. The elastic deformation column bag 4 is used to elastically deform and loosen the dust in the ash hopper 2.

[0037] Reference Figure 2 and Figure 3 Specifically, the gasification plate assembly 3 includes a metal shell 31, a silicon carbide gasification plate 32 and an air passage 33. The metal shell 31 is bolted and sealed to the outer wall of the ash hopper 2, and a gasification hole is provided at the corresponding outer wall of the ash hopper 2. The silicon carbide gasification plate 32 is installed inside the metal shell 31, and the two ends of the air passage 33 are respectively connected to the compressed air source and the metal shell 31, so that the external compressed air can enter the ash hopper 2 through the silicon carbide gasification plate 32 and the gasification hole.

[0038] Reference Figure 2 A plurality of elastic deformation column bags 4 are provided, and the plurality of elastic deformation column bags 4 are located inside the ash hopper 2 and are arranged at intervals along the height direction of the ash hopper 2. The surface of the elastic deformation column bag 4 is provided with an elastic wear-resistant coating.

[0039] Reference Figure 4 The first control valve 5 and the second control valve 6 are respectively installed on the two outer side walls of the ash hopper 2 which are far away from each other. The number of the first control valve 5 and the second control valve 6 corresponds to the number of the elastic deformation column bags 4. The two ends of the elastic deformation column bag 4 are respectively connected to the first control valve 5 and the second control valve 6. The first control valve 5 is used to control the external compressed air to pass into the elastic deformation column bag 4 to change its shape and position. The second control valve 6 is connected to the external negative pressure source to control the extraction of gas from the elastic deformation column bag 4 to form a negative pressure state.

[0040] Reference Figure 2 It is worth noting that the two ends of the elastic deformation column bag 4 are provided with a gasification plate assembly 3, that is, one elastic deformation column bag 4 corresponds to two gasification plate assemblies 3. And the multiple elastic deformation column bags 4 can be horizontally placed inside the ash hopper 2, can be tilted, or can be combined horizontally or tilted. The lengths of the multiple elastic deformation column bags 4 can be the same, or can be gradually decreasing or increasing to match the lengths of different widths in the height direction of the ash hopper 2.

[0041] The implementation principle of Example 1 is: under normal working conditions, dust in the electrostatic precipitator area and the bag filter area falls into the ash hopper 2 and accumulates, the elastic deformation column bag 4 remains in a compressed state, the accumulated dust buries the elastic deformation column bag 4, and the ash hopper 2 is opened at a specified time to discharge ash.

[0042] When the dust in the ash hopper 2 is hardened and cannot be discharged normally, compressed air is introduced into the gasification plate assembly 3 to spray the hardened dust inside the ash hopper 2. At the same time, the first control valve 5 is opened to allow external compressed air to enter the elastic deformation column bag 4, so that it gradually expands and changes its position, and the hardened dust is disintegrated from the inside. The second control valve 6 is connected to the external negative pressure source, and the gas in the elastic deformation column bag 4 is extracted from time to time to form a negative pressure state. Through the flexible switching of the first control valve 5 and the second control valve 6, the elastic deformation column bag 4 alternates between the expansion and contraction states, and the position where the hardened dust is sprayed is constantly changed, ensuring that the gasification plate assembly 3 can not only perform the initial spraying of the hardened dust, but also continue to act on the broken dust, effectively preventing the dust from clogging the discharge port of the ash hopper 2. In addition, the continuous deformation of the elastic deformation column bag 4 can repeatedly squeeze the dust in the fluidized state, accelerate the discharge process of the dust in the ash hopper 2, and thus improve the fluidization efficiency of the hardened dust in the ash hopper 2.

[0043] Example 2, reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that the elastic deformation column bag 4 includes a plurality of deformation bags 41 and a plurality of rigid support rings 42, and the plurality of deformation bags 41 and the plurality of rigid support rings 42 are alternately arranged in a straight line direction. The ends of the deformation bags 41 are connected to the surface of the rigid support ring 42. The deformation bags 41 at both ends of the elastic deformation column bag 4 are respectively connected to the first control valve 5 and the second control valve 6. The deformation bags 41 at both ends of the elastic deformation column bag 4 are located above the position of the gasification plate assembly 3, so that the gasification plate assembly 3 first fluidizes the dust covering the deformation bags 41 at both ends of the elastic deformation column bag 4.

[0044] Reference Figure 6 The deformable bag 41 between the adjacent rigid support rings 42 is initially set in a twisted state. When compressed air is injected into the elastic deformable column bag 4, the deformable bag 41 releases the stress generated by the increase in gas pressure by rotating or twisting based on its twisted state. When the gas in the elastic deformable column bag 4 is extracted by negative pressure, the deformable bag 41 twists in the opposite direction to that during inflation to adapt to the decrease in gas pressure.

[0045] Reference Figure 6A plurality of blowing holes 43 are formed through the surface of the rigid support ring 42 . A dustproof net 7 is provided at the position of the blowing holes 43 of the rigid support ring 42 . The blowing holes 43 are used for the compressed gas in the elastic deformation bag 41 to pass through.

[0046] The implementation principle of Example 2 is as follows: by utilizing the torsion setting of the deformable bag 41 and coordinating the on-off of the first control valve 5 and the second control valve 6, the elastic deformable column bag 4 can release the stress caused by gas changes through rotation or twisting when it is inflated and expanded or contracted, so that the compressed airflow of the blowing hole 43 can change continuously, thereby achieving the effect of rotating and cutting the compacted dust with airflow, further quickly disintegrating the compacted dust structure internally, and accelerating the fluidization efficiency of the compacted dust.

[0047] Example 3, reference Figure 7 and Figure 8 The difference between this embodiment and the second embodiment is that the elastic deformation column bag 4 further includes a plurality of protective cylinders 44, each rigid support ring 42 corresponds to two protective cylinders 44, and the two protective cylinders 44 are respectively fixed on the opposite side walls of the rigid support ring 42. The deformation bag 41 is located in the protective cylinder 44 to form an isolation zone between the deformation bag 41 and the dust. The outer surface of the protective cylinder 44 is provided with a lubricating layer, and a deformation gap 8 is left between the opposite protective cylinders 44.

[0048] Reference Figure 8 The purpose of designing the protective tube 44 is to reduce the contact area between the deformation bag 41 and the dust during the torsion process, thereby reducing the wear area between the compacted dust and the torsion deformation bag 41, increasing the service life of the deformation bag 41, and improving the problem that the deformation bag 41 in the torsion state is hindered from rotating by the compacted dust. Of course, in order to improve the effect of dust entering the protective tube 44, the adjacent protective tubes 44 can also be rotatably connected with elastic components to close the gaps between the adjacent protective tubes 44.

[0049] Reference Figure 6 and Figure 8 A cutting blade 9 is fixed to the circumference of the rigid support ring 42. The interior of the cutting blade 9 is hollow, and the blowing hole 43 is located inside the cutting blade 9. A cutting airflow hole 91 is provided at the end of the cutting blade 9 away from the rigid support ring 42, and the cutting airflow hole 91 is connected to the blowing hole 43. The axis of the cutting airflow hole 91 is on the tangent of the cutting blade 9, so that when the compressed gas flows out of the airflow hole, the compressed gas acts along the tangent direction of the cutting blade 9 to generate a rotational torque.

[0050] Reference Figure 8 It is worth noting that the number of the cutting blades 9 can be one, two or more. The shape of the cutting blade 9 can achieve a rotating cutting effect in the compacted dust, and this application will not go into details.

[0051] The implementation principle of Example 3 is as follows: when the elastically deformable column bag 4 is inflated and expanded or deflated, the cutting blade 9 cuts the compacted dust in a rotating posture, assisted by the airflow of the cutting air flow hole 91, so that when the elastically deformable column bag 4 is twisted, the cutting blade 9 cuts the compacted dust, thereby further improving the fluidization efficiency of the compacted dust and reducing the risk of the elastically deformable column bag 4, when inflating, pushing the dust in the ash hopper 2 toward the electrostatic precipitator area and causing an electric field short circuit.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric bag dust collector, characterized in that: It comprises an ash hopper (2), a gasification plate assembly (3) and an elastic deformation column bag (4); the gasification plate assembly (3) is installed on the outer wall of the ash hopper (2) to guide external compressed air to be sprayed into the inside of the ash hopper (2); a first control valve (5) and a second control valve (6) are respectively installed on the two side walls of the ash hopper (2) away from each other; the two ends of the elastic deformation column bag (4) are respectively connected to the first control valve (5) and the second control valve (6), and the elastic deformation column bag (4) is used to loosen the dust compacted in the ash hopper (2); the first control valve (5) is used to control the external compressed air to pass into the elastic deformation column bag (4) to change its shape and position, and the second control valve (6) is connected to an external negative pressure source to control the extraction of gas from the elastic deformation column bag (4) to form a negative pressure state.

2. The electric bag dust collector according to claim 1, characterized in that: The side wall of the elastic deformation column bag (4) is provided with a plurality of blowing holes (43), and the blowing holes (43) allow the compressed gas in the elastic deformation bag (41) to pass through.

3. The electric bag dust collector according to claim 2, characterized in that: The elastic deformation column bag (4) comprises a plurality of deformation bags (41) and a plurality of rigid support rings (42); the plurality of deformation bags (41) and the plurality of rigid support rings (42) are arranged alternately along a straight line; the ends of the deformation bags (41) are connected to the surface of the rigid support ring (42); the deformation bags (41) at both ends of the elastic deformation column bag (4) are respectively connected to the first control valve (5) and the second control valve (6); the blowing hole (43) is arranged on the rigid support ring (42); and a dustproof net (7) is arranged on the rigid support ring (42) at the position of the blowing hole (43).

4. The electric bag dust collector according to claim 3, characterized in that: The deformable bag (41) between adjacent rigid support rings (42) is arranged in a twisted state in an initial state; when compressed air is injected into the elastic deformable column bag (4), the deformable bag (41) releases the stress generated by the increase of gas pressure through rotation or twisting based on its twisted state; and when the gas in the elastic deformable column bag (4) is extracted by negative pressure, the deformable bag (41) twists in the twisting direction opposite to that during inflation to adapt to the reduction of gas pressure.

5. The electric bag dust collector according to claim 4, characterized in that: A cutting blade (9) is provided on the circumferential side of the rigid support ring (42).

6. The electric bag dust collector according to claim 5, characterized in that: The cutting blade (9) is hollow inside, and the blowing hole (43) is located inside the cutting blade (9); a cutting air flow hole (91) is provided at the end of the cutting blade (9) away from the rigid support ring (42), and the cutting air flow hole (91) is connected to the blowing hole (43).

7. The electric bag dust collector according to claim 6, characterized in that: The axis of the cutting air flow hole (91) is located on the tangent of the cutting blade (9), so that when the compressed gas is guided to flow out of the air flow hole, the compressed gas acts along the tangent direction of the cutting blade (9) to generate a rotational torque.

8. An electric bag dust collector according to any one of claims 4 to 7, characterized in that: The elastically deformable column bag (4) also includes a plurality of protective tubes (44), each of the rigid support rings (42) corresponds to two of the protective tubes (44), and the two protective tubes (44) are respectively installed on the opposite side walls of the rigid support ring (42); the deformable bag (41) is located in the protective tube (44), and a deformation gap (8) is left between the opposite protective tubes (44).

9. The electric bag dust collector according to claim 1, characterized in that: A plurality of the elastically deformable column bags (4) are provided, and the plurality of the elastically deformable column bags (4) are arranged at intervals along the height direction of the ash hopper (2); the first control valve (5) and the second control valve (6) are respectively installed at both ends of each of the elastic column bags.

10. The electric bag dust collector according to claim 9, characterized in that: The surface of the elastic deformation column bag (4) is provided with an elastic wear-resistant coating.

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