Device for wear resistance experiment of filter bag

Abstract

The utility model discloses a filter bag wear resistance experiment device which comprises a storage system, a feeding system, a transmission system and a clamping system which are connected in sequence, and the rear side of the clamping system is connected with a blowing system and a power source; the clamping system comprises a first clamping plate and a second clamping plate, a first through hole is formed in the first clamping plate, a second through hole corresponding to the first through hole is formed in the second clamping plate, and a filter material of the filter bag is clamped between the first clamping plate and the second clamping plate; the conveying system is of a pipeline structure with the two ends communicated, and the head end of the conveying system is of a downwards-bent structure and connected to the top of the output end of the feeding system. The tail end of the transmission system is of a horizontally-extending structure and communicates with the first through hole. The second through hole is communicated with the power source and the blowing system; the power source is an induced draft fan; and the blowing system is used for blowing gas into the second through hole. By means of the device, application in real working conditions can be simulated in a laboratory, and the abrasion resistance experiment result of the filter bag is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collector filter bags, in particular to a device for a wear resistance test of filter bags. Background Art

[0002] In order to control and reduce dust emissions, various types of dust collectors have been widely used, among which bag dust collectors are essential equipment for flue gas dust pollution treatment equipment and are important equipment for removing dust particles in flue gas.

[0003] As the core of dust removal equipment, bag dust collector can achieve a removal rate of 99%. However, during operation, the filter bags will be damaged and fail due to the blowing of airflow and the friction of dust.

[0004] In order to determine the failure degree of the filter bag and the remaining wear resistance, the wear resistance test is currently carried out using the test method for the wear resistance of textiles. The aforementioned test method is mainly the Martindale method, but the actual working conditions of the filter bag are more complicated, with dust and airflow flushing back and forth, and the working environment temperature is high or unstable. The Martindale method can only simulate the friction in life and does not match the working environment of the filter bag in the dust collector. Therefore, a device that can simulate the wear resistance of the filter bag in the actual working conditions in the laboratory is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a filter bag wear test device, which can simulate the application in actual working conditions in the laboratory, make the wear test results of the filter bag more accurate, improve the research efficiency of the filter bag, and make the filter bag have better performance.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A filter bag wear test device includes a storage system, a feeding system, a transmission system, a clamping system, a blowing system and a power source;

[0008] The output end of the storage system is connected to the input end of the feeding system, the output end of the feeding system is connected to the head end of the transmission system, the tail end of the transmission system is connected to one side of the clamping system, and the other side of the clamping system is connected to the blowing system and the power source;

[0009] The clamping system comprises a first clamping plate and a second clamping plate, the first clamping plate is provided with a first through hole, the second clamping plate is provided with a second through hole corresponding to the first through hole, the first clamping plate and the second clamping plate are used to clamp the filter material of the filter bag, and the filter material is located between the first through hole and the second through hole;

[0010] The transmission system is a pipe structure with both ends connected, and the head end of the transmission system is a structure bent downward, and the head end is connected to the top of the output end of the feeding system; the tail end of the transmission system is a structure extending horizontally, and the tail end is connected to the first through hole of the first clamping plate of the clamping system;

[0011] The second through hole of the second clamping plate of the clamping system is connected to the power source and the blowing system; the power source is a blower; the blowing system is used for blowing gas into the second through hole.

[0012] Further, the storage system includes a storage box and a screw feeder; the inside of the storage box is funnel-shaped, and the conical opening at the bottom of the storage box is connected to the top inlet of the screw feeder; the feeding system includes a feeder and a nozzle, the feeder is arranged on one side of the screw feeder, and the inlet of the feeder is connected to the feeding outlet of the screw feeder; a plurality of the nozzles are arranged on the outlet side of the feeder, each nozzle is located at the top of the feeder and is connected to the head end of the transmission system, and the nozzle is used for spraying dust into the transmission system.

[0013] Further, the clamping system further includes a bracket and a telescopic pipe; the first clamping plate and the second clamping plate are erected on the bracket, the telescopic pipe is connected to the second clamping plate, one end of the telescopic pipe is connected to the second through hole, and the other end of the telescopic pipe is connected to the blowing system and the power source;

[0014] A chute is provided at the top of the bracket, the bottoms of the first clamping plate and the second clamping plate protrude with sliders, and the sliders of the first clamping plate and the second clamping plate are both assembled in the chute; the second clamping plate moves relatively closer to or away from the first clamping plate along the chute by using the slider, and the telescopic pipe expands and contracts as the second clamping plate slides.

[0015] Further, the bracket includes a horizontal support and support feet, and the four corners of the horizontal support are respectively connected to the four support feet; the chute is arranged at the top of the horizontal support, and a long hole in the chute is communicated with the bottom surface of the horizontal support; locking holes are provided at the bottoms of the sliders of the first clamping plate and the second clamping plate; two adjusting screws are provided below the long hole, and the two adjusting screws pass upward through the long hole and are movably locked to the locking holes of the sliders on the first clamping plate and the second clamping plate.

[0016] Further, a plurality of recessed parts are provided on the surface of the first clamping plate adjacent to the second clamping plate, and each recessed part is distributed around the first through hole; a plurality of protruding parts are provided on the surface of the second clamping plate adjacent to the first clamping plate, and each protruding part is used for movably embedding into each recessed part; the filter material of the filter bag is simultaneously pressed and matched by each recessed part and each protruding part.

[0017] Further, connection through-holes are respectively provided at the four corners of the first clamping plate and the second clamping plate; after the first clamping plate and the second clamping plate approach each other and clamp the filter material of the filter bag, the first clamping plate and the second clamping plate are locked and fixed by passing four bolts through the respective connection through-holes at the four corners.

[0018] Further, a dust recovery device is further included; the dust recovery device is connected below the tail end of the transmission system.

[0019] Further, the second through-hole of the second clamping plate of the clamping system is connected to the rear-end channel; the jetting system includes an air compressor, a jetting valve, and a nozzle that are connected in sequence; the nozzle extends into the rear-end channel, and the nozzle faces the second through-hole; the power source is located at the rear side of the rear-end channel and communicates with the rear-end channel.

[0020] Further, the nozzle is externally connected with an air pipe through an air pipe joint; the feeder includes a chamber, a steel brush, and a motor. The steel brush is installed in the chamber, and the motor drives the steel brush to rotate. The steel brush drives the dust in the lower layer space of the chamber to the upper layer space by rotation, so that the dust drifts towards the nozzle; and the air pipe gives wind force to eject the dust from the nozzle.

[0021] After adopting the above technical solution, first, according to the actual working conditions of the filter bag, select the dust with an approximate output under the same working conditions and put it into the storage system. Cut the filter bag to be worked into a specified size and clamp it on the clamping system. Adjust the air volume of the power source (through the air flow in the transmission system) to the wind speed required by the working conditions, or it can be slightly larger. Then, the dust concentration in the transmission system can be adjusted through the feeding system so that the concentration can reach the maximum concentration at the air inlet during the operation of the working conditions. Then, set the jetting pressure and jetting duration of the jetting system according to the requirements, which can better prevent the formation of a dust cake layer and better simulate the actual working conditions. Thus, by using this device, the dust can impact the filter material of the filter bag as much as possible, achieving the simulation of the actual operation of the filter bag. By recording the corresponding breakage time, the corresponding wear-resistant data can be measured, and the wear-resistant data is more in line with the actual working conditions and more accurate. Description of the Drawings

[0022] Figure 1 Schematic diagram of an embodiment of the present utility model, showing the induced air flow of the power source;

[0023] Figure 2 Schematic diagram of an embodiment of the present utility model, showing the jetting air flow of the jetting system;

[0024] Figure 3 Top view of the storage system and the feeding system of an embodiment of the present utility model;

[0025] Figure 4 Exploded view of the clamping system of an embodiment of the present utility model;

[0026] Figure 5 Partial structural schematic diagram of the clamping system according to an embodiment of the present utility model;

[0027] Figure 6 Structural schematic diagram of the feeding system according to an embodiment of the present utility model.

[0028] Reference numerals description: storage system 1, storage box 11, screw feeder 12, feeding system 2, feeder 21, nozzle 22, transmission system 3, head end 31, tail end 32, clamping system 4, first clamping plate 41, first through hole 411, recessed portion 412, second clamping plate 42, second through hole 421, protruding portion 422, bracket 43, sliding groove 431, long hole 4311, horizontal support 432, convex portion 4321, support leg 433, telescopic tube 44, slider 45, adjusting screw 46, connecting through hole 47, jetting system 5, air compressor 51, jetting valve 52, nozzle 53, power source 6, filter material 7, flange 8, rear end passage 9, dust recovery device 10. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0030] As Figures 1 to 5 shown, a device for a filter bag wear resistance experiment of the present utility model includes a storage system 1, a feeding system 2, a transmission system 3, a clamping system 4, a jetting system 5 and a power source 6.

[0031] The storage system 1 is used for storing dust. The output end of the storage system 1 is connected to the input end of the feeding system 2. The output end of the feeding system 2 is connected to the head end 31 of the transmission system 3. The tail end 32 of the transmission system 3 is connected to one side of the clamping system 4. The other side of the clamping system 4 is connected to the jetting system 5 and the power source 6. Thus, the dust in the storage system 1 can be output to the transmission system 3 via the feeding system 2.

[0032] The clamping system 4 includes a first clamping plate 41 and a second clamping plate 42. The first clamping plate 41 is provided with a first through hole 411. The second clamping plate 42 is provided with a second through hole 421 corresponding to the first through hole 411. Between the first clamping plate 41 and the second clamping plate 42 is used for clamping the filter material 7 of the filter bag, and the filter material 7 is located between the first through hole 411 and the second through hole 421;

[0033] The transmission system 3 is a pipe structure with both ends connected, and the head end 31 of the transmission system 3 is a structure bent downward. The head end 31 is connected to the top of the output end of the feeding system 2; the tail end 32 of the transmission system 3 is a structure extending horizontally, and the tail end 32 communicates with the first through hole 411 of the first clamping plate 41 of the clamping system 4; the tail end 32 of the transmission system 3 can be integrally connected and fixed with the first clamping plate 41, or detachably connected and fixed through a flange 8, etc.

[0034] The second through hole 421 of the second clamping plate 42 of the clamping system 4 communicates with the power source 6 and the jetting system 5; the power source 6 is an induced draft fan for inducing air. Since the air flow attracted by the power source 6 can sequentially pass through the transmission system 3, the first through hole 411, and the second through hole 421, the dust in the transmission system 3 can be blown from the head end 31 to the tail end 32 along with the air flow and then enter the first through hole 411, thereby simulating the impact of the dust on the filter material 7 between the first through hole 411 and the second through hole 421 under actual working conditions; the jetting system 5 is used to jet gas into the second through hole 421, that is, to clean the filter material 7 and prevent the dust on the filter material 7 from caking.

[0035] At the same time, the head end 31 of the transmission system 3 is bent downward, which is more in line with the flow conditions of dust and air flow under actual working conditions. The pipe parameters of the transmission system 3 can be a diameter of 150 mm and a length of 50 cm.

[0036] Therefore, when using this device for experiments, first, according to the actual working conditions of the filter bag, select dust approximately produced under the same working conditions and put it into the storage system 1. Cut the filter bag to be worked into a specified size and clamp it on the clamping system 4. Adjust the air volume of the power source 6 (through the air flow rate in the transmission system 3) to the wind speed required by the working conditions, or it can be slightly larger. Then, the dust concentration in the transmission system 3 can be adjusted through the feeding system 2 so that the concentration can reach the maximum concentration at the air inlet during working conditions. Then, set the jetting pressure and jetting duration of the jetting system 5 according to the requirements, which can better prevent the formation of a dust cake layer and better simulate the actual working conditions. Thus, using this device can make the dust impact the filter material 7 of the filter bag as much as possible, achieving the situation of the actual operation of the filter bag. By recording the corresponding breakage time, the corresponding wear-resistant data can be measured.

[0037] In this embodiment, refer to Figure 3 , the storage system 1 includes a storage box 11 and a screw feeder 12. The screw feeder 12 adopts the structure of the existing technology, and a simple drawing method is used in the figure. The inside of the storage box 11 is in a funnel shape, and the conical opening at the bottom of the storage box 11 communicates with the top inlet of the screw feeder 12 to facilitate the flow of dust into the screw feeder 12.

[0038] Refer to Figure 6, the feeding system 2 includes a feeder 21 and a nozzle 22. The feeder 21 is arranged on one side of the screw feeder 12, and the inlet of the feeder 21 communicates with the feeding outlet of the screw feeder 12; several nozzles 22 are arranged on the outlet side of the feeder 21. Each nozzle 22 is located at the top of the feeder 21 and communicates with the head end 31 of the conveying system 3. The nozzle 22 can be externally connected with an air pipe (not shown in the figure) through an air pipe joint 221. The feeder 21 and the nozzle 22 are drawn in a simplified way in the figure. The feeder 21 includes a chamber 211, a steel brush 212 and a motor 213. The steel brush 212 is installed in the chamber 211. The motor 213 drives the steel brush 212 to rotate. The steel brush 212 brings the dust in the lower space of the chamber 211 to the upper space by rotation, so that the dust drifts towards the nozzle 11. The air pipe connected to the nozzle 22 gives power to eject the dust from the nozzle 22, and controls the dust ejection concentration by controlling the wind force. At the same time, a certain initial velocity can be given to the dust, which can cooperate with the induced draft fan of the power source 6 to simulate a dust impact effect more in line with the actual working conditions.

[0039] The feeding system 2 can receive the dust from the storage system 1 and adjust it through the feeder 21 and the nozzle 22, and then output the required concentration of dust to the conveying system 3.

[0040] In this embodiment, the second through hole 421 of the second clamping plate 42 of the clamping system 4 is connected with a rear-end channel 9; the blowing system 5 includes an air compressor 51, a blow-pulse valve 52 and a nozzle 53 connected in sequence; the nozzle 53 extends into the rear-end channel 9 and faces the second through hole 421. The blowing system 5 adopts an independent air compressor 51, which can realize the pulse cleaning of the filter material 7; the power source 6 is located at the rear side of the rear-end channel 9 and communicates with the rear-end channel 9 to achieve the induced draft effect.

[0041] Another example Figure 4 and Figure 5 , in this embodiment, the clamping system 4 further includes a bracket 43 and a telescopic pipe 44; the first clamping plate 41 and the second clamping plate 42 are erected on the bracket 43. The telescopic pipe 44 is connected to the second clamping plate 42. One end of the telescopic pipe 44 communicates with the second through hole 421, and the other end of the telescopic pipe 44 is connected to the blowing system 5 and the power source 6. In this embodiment, the telescopic pipe 44 is connected to the rear-end channel 9.

[0042] The top of the bracket 43 is provided with a chute 431. The bottoms of the first clamping plate 41 and the second clamping plate 42 protrude with sliders 45, and the sliders 45 of the first clamping plate 41 and the second clamping plate 42 are both assembled in the chute 431. The second clamping plate 42 moves relatively closer to or farther away from the first clamping plate 41 along the chute 431 by means of the sliders 45, and the telescopic tube 44 expands and contracts as the second clamping plate 42 slides. In this embodiment, since the first clamping plate 41 is fixed to the transmission system 3, the second clamping plate 42 is arranged to slide relative to the first clamping plate 41. Of course, the first clamping plate 41 and the second clamping plate 42 can also slide simultaneously.

[0043] The provision of the bracket 43 facilitates the connection between the clamping system 4 and the transmission system 3. At the same time, the second clamping plate 42 can slide relative to the first clamping plate 41 along the chute 431 to facilitate the installation and replacement of the filter material 7. The telescopic tube 44 expands and contracts as the second clamping plate 42 slides, avoiding affecting the connection between the second clamping plate 42 and other structures at the rear side.

[0044] Specifically, the bracket 43 may include a horizontal support 432 and support legs 433. Four support legs 433 are respectively connected to the four corners of the horizontal support 432. The chute 431 is provided on the top of the horizontal support 432. In this embodiment, two convex portions 4321 protrude at intervals on the front and rear sides of the horizontal support 432, and the chute 431 is provided on each of the convex portions 4321. At least one of the chutes 431 has a long hole 4311 communicating with the bottom surface of the horizontal support 432.

[0045] Correspondingly, the bottoms of the first clamping plate 41 and the second clamping plate 42 may be provided with two sliders 45 to cooperate with the two chutes 431, improving the smoothness of installation and sliding.

[0046] The sliders 45 of the first clamping plate 41 and the second clamping plate 42 corresponding to the chutes 431 having the long holes 4311 may be provided with locking holes (not shown in the figure). Two adjusting screws 46 are provided below the long holes 4311. The two adjusting screws 46 pass upward through the long holes 4311 and are movably locked to the locking holes of the sliders 45 on the first clamping plate 41 and the second clamping plate 42. When both of the two adjusting screws 46 are loosened, the second clamping plate 42 can slide along the chute 431, facilitating the installation of the filter material 7 and driving the corresponding adjusting screws 46 to slide in the long holes 4311. The second clamping plate 42 can also slide along the chute 431 to adjust the installation position of the first clamping plate 41. When it is necessary to fix the positions of the first clamping plate 41 and the second clamping plate 42, by tightening the adjusting screws 46, the first clamping plate 41 and the second clamping plate 42 can be respectively locked to the horizontal support 432.

[0047] Meanwhile, a plurality of recessed portions 412 may be provided on the adjacent surfaces of the first clamping plate 41 and the second clamping plate 42, and each recessed portion 412 is distributed around the first through hole 411; and a plurality of protruding portions 422 may be provided on the surface of the second clamping plate 42 adjacent to the first clamping plate 41, and each protruding portion 422 is used for movably fitting into each recessed portion 412; thus, when the filter media 7 of the filter bag is clamped by the first clamping plate 41 and the second clamping plate 42, it can be simultaneously pressed and fitted by each recessed portion 412 and the protruding portion 422, so as to improve the clamping effect of the clamping system 4 on the filter media 7 and prevent the filter media 7 from falling out of the clamping system 4.

[0048] Meanwhile, connection through holes 47 are respectively provided at the four corners of the first clamping plate 41 and the second clamping plate 42; after the first clamping plate 41 and the second clamping plate 42 are close to each other to clamp the filter media 7 of the filter bag, four bolts (not shown in the figure) pass through the respective connection through holes 47 at the four corners to lock and fix the first clamping plate 41 and the second clamping plate 42. In this way, the filter media 7 can be firmly clamped tightly.

[0049] The device of the present utility model may further include a dust recovery device 10; the dust recovery device 10 is connected below the tail end 32 of the transmission system 3 to be adjacent to the first through hole 411 of the clamping system 4. The dust recovery device 10 provided at the tail end 32 of the transmission system 3 can ensure that the dust can be reused multiple times and prevent waste. Moreover, the dust recovery device 10 also has the function of supporting the transmission system 3.

[0050] The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the idea of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, equivalent changes and modifications made without departing from the principle of the present utility model should still fall within the protection scope of the present utility model.

[0051] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0052] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meanings of "a plurality" and "several" are two or more, unless otherwise specifically defined.

[0053] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

Claims

1. A filter bag wear test device, characterized in that: It includes storage system, feeding system, transmission system, clamping system, injection system and power source; The output end of the storage system is connected to the input end of the feeding system, the output end of the feeding system is connected to the head end of the transmission system, the tail end of the transmission system is connected to one side of the clamping system, and the other side of the clamping system is connected to the blowing system and the power source; The clamping system comprises a first clamping plate and a second clamping plate, the first clamping plate is provided with a first through hole, the second clamping plate is provided with a second through hole corresponding to the first through hole, the first clamping plate and the second clamping plate are used to clamp the filter material of the filter bag, and the filter material is located between the first through hole and the second through hole; The transmission system is a pipeline structure with two ends connected, and the head end of the transmission system is a downwardly bent structure, and the head end is connected to the top of the output end of the feeding system; the tail end of the transmission system is a horizontally extended structure, and the tail end is connected to the first through hole of the first clamping plate of the clamping system; The second through hole of the second clamping plate of the clamping system is connected to the power source and the blowing system; the power source is an induced draft fan; and the blowing system is used for blowing gas toward the second through hole.

2. The filter bag wear test device according to claim 1, characterized in that: The storage system includes a storage box and a screw feeder; the interior of the storage box is funnel-shaped, and the conical opening at the bottom of the storage box is connected to the top inlet of the screw feeder; the feeding system includes a feeder and a nozzle, the feeder is arranged on one side of the screw feeder, and the inlet of the feeder is connected to the feeding outlet of the screw feeder; a plurality of nozzles are arranged on the outlet side of the feeder, each nozzle is located at the top of the feeder and is connected to the head end of the transmission system, and the nozzle is used to spray dust into the transmission system.

3. The filter bag wear test device according to claim 1, characterized in that: The clamping system further includes a bracket and a telescopic tube; the first clamping plate and the second clamping plate are vertically arranged on the bracket, the second clamping plate is connected to the telescopic tube, one end of the telescopic tube is connected to the second through hole, and the other end of the telescopic tube is connected to the spraying system and the power source; A slide groove is provided on the top of the bracket, and sliders are protruding from the bottom of the first and second clamps, and the sliders of the first and second clamps are both assembled in the slide groove; the second clamp uses the slider to move relatively close to or away from the first clamp along the slide groove, and the telescopic tube telescopes as the second clamp slides.

4. The filter bag wear test device according to claim 3, characterized in that: The bracket includes a horizontal support and legs, and the four corners of the horizontal support are respectively connected to the four legs; the slide groove is arranged on the top of the horizontal support, and a long hole is provided in the slide groove to connect to the bottom surface of the horizontal support; the bottom of the sliders of the first and second clamping plates are provided with locking holes; two adjusting screws are arranged under the long holes, and the two adjusting screws are movably locked to the locking holes of the sliders on the first and second clamping plates after passing through the long holes upwards.

5. The filter bag wear test device according to claim 1, characterized in that: A plurality of recessed portions are provided on the surface adjacent to the first clamping plate and the second clamping plate, and the recessed portions are distributed around the first through hole; a plurality of protruding portions are provided on the surface adjacent to the first clamping plate, and the protruding portions are used to be movably embedded in the recessed portions; the filter material of the filter bag is pressed and fitted by the recessed portions and the protruding portions at the same time.

6. The filter bag wear test device according to claim 1, characterized in that: The four corners of the first clamping plate and the second clamping plate are respectively provided with connecting through holes; after the first clamping plate and the second clamping plate are close to each other to clamp the filter material of the filter bag, four bolts are passed through the connecting through holes in the four corners to lock and fix the first clamping plate and the second clamping plate.

7. The filter bag wear test device according to claim 1, characterized in that: It also includes a dust recovery device; the dust recovery device is connected below the tail end of the transmission system.

8. The filter bag wear test device according to claim 1, characterized in that: The second through hole of the second clamping plate of the clamping system is connected to the rear end channel; the blowing system includes an air compressor, a jet blowing valve and a nozzle connected in sequence; the nozzle extends into the rear end channel and faces the second through hole; the power source is located on the rear side of the rear end channel and is connected to the rear end channel.

9. The filter bag wear test device according to claim 2, characterized in that: The nozzle is connected to an air pipe through an air pipe joint; the feeder includes a chamber, a steel brush and a motor, the steel brush is installed in the chamber, the motor drives the steel brush to rotate, and the steel brush brings the dust in the lower space of the chamber to the upper space through rotation, so that the dust floats toward the nozzle; and the air pipe provides wind force to spray the dust out of the nozzle.

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