Dust collector for shot blasting machine

Abstract

The present invention relates to the field of dust collectors, and in particular to a dust collector for a shot blasting machine. When a linear drive device positively drives a dust collecting tube bag to unfold, a switching shaft of a movable disk can push a straight plug-in unit, and the movable disk fits tightly with a partition plate while a cover plate covers an air port, and then an air outlet of a back-blowing airflow pipeline is connected with the inside of a filter cartridge through an air port and an exhaust port of a filter cartridge, thereby improving the sealing degree between the air outlet of a back-blowing device and an opening of a filter cartridge, so as to allow all the airflow of the back-blowing device to enter the inside of the filter cartridge, and then a higher atmospheric pressure and airflow enter the inside of the filter cartridge, and finally improving the cleaning effect of the back-blowing device on the filter cartridge.

Description

Technical Field

[0001] The invention relates to the field of dust collectors, in particular to a dust collector for a shot blasting machine. Background Art

[0002] The shot blasting machine will produce dusty gas during the processing of the workpiece surface. In order to ensure the cleanliness and safety of the working environment, it is usually necessary to use professional dust collector equipment to strictly filter the generated dust and particles. After a period of use, the filter cartridge of the dust collector needs to be backblown to remove dust from the outer surface of the filter cartridge.

[0003] In order to improve the efficiency of back-blowing cleaning, Chinese patent publication number CN116510436B introduces in detail a design of an oblique-insertion filter cartridge dust collector specially used for shot blasting machines. The equipment adopts a structure of multiple filter cartridges arranged up and down, and is specially provided with a folding bag cover, which can cover the outside of the filter cartridge after unfolding. In order to effectively remove the dust on the filter cartridge, the equipment is equipped with a back-blowing device; during the back-blowing cleaning process, the back-blowing device blows airflow into the inside of the filter cartridge through the mouth of the filter cartridge, so that the dust outside the filter cartridge is blown off by the airflow inside the filter cartridge and collected in the unfolded folding bag. This design ensures that the dust falling from the upper filter cartridge will not be directly scattered onto the filter cartridge below, thereby significantly improving the dust removal effect and operating efficiency.

[0004] However, its defects are: during the back-blowing cleaning process, there is a certain distance between the air outlet of the back-blowing device and the mouth of the filter cartridge, and there is a lack of an oral connection structure to improve the sealing between the air outlet of the back-blowing device and the mouth of the filter cartridge. This results in the back-blowing airflow of the back-blowing device having two destinations, the first part being directly discharged through the air outlet of the filter cartridge dust collector, and only the second part entering the filter cartridge from the filter cartridge mouth for soot blowing; that is, the first part of the back-blowing airflow does not play a soot blowing role, thereby reducing the soot blowing efficiency of the back-blowing airflow. Summary of the invention

[0005] The present invention provides a dust collector for a shot blasting machine, and the technical problem to be solved is: how to improve the sealing degree between the air outlet of the back-blowing device and the mouth of the filter cartridge, so as to allow the back-blowing airflow of the back-blowing device to completely enter the interior of the filter cartridge, thereby improving the cleaning efficiency of the back-blowing airflow on the filter cartridge.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0007] A dust collector for a shot blasting machine comprises a box, a filter cartridge, and a dust collecting tube bag; the box is provided with a clean air chamber and a gas processing chamber; an air inlet is connected to the gas processing chamber; a plurality of filter cartridges are arranged up and down in the gas processing chamber; a fixed end of the dust collecting tube bag is fixed to the inner wall of the gas processing chamber;

[0008] It is characterized by further comprising:

[0009] A movable plate is fixedly connected to the movable end of the dust collecting tube bag; the movable plate is fixedly provided with a switching shaft;

[0010] A linear drive device, which can drive the moving plate to move linearly back and forth, so as to switch the dust collecting tube bag between a folded state and an unfolded state;

[0011] A back-blowing device, wherein the exhaust pipeline is a back-blowing airflow pipeline, and the back-blowing airflow pipeline is a flexible pipeline;

[0012] An orifice connection structure, which can cover the air port and allow the backflush airflow pipeline to communicate with the air port;

[0013] Among them, when the linear drive device drives the dust collecting tube bag to unfold in the forward direction, the movable disk will squeeze the mouth connecting structure to cover the air outlet and allow the back-blowing air flow pipeline to be connected to the air outlet; when the linear drive device drives the dust collecting tube bag to fold in the reverse direction, the mouth connecting structure can be evacuated from the air outlet.

[0014] Furthermore, the mouth connection structure includes a swing shaft, a connecting component, a cover plate, a straight plug-in, a guide member, and a rubber cover; the cover plate is in close contact with the surface of the partition in the clean air chamber, and the air outlet of the back-blowing airflow pipeline passes through the cover plate; the partition is provided with a through-going mounting hole; the swing shaft is rotatably arranged in the mounting hole, and the connecting component fixes the swing shaft and the cover plate together; the limiting component is fixedly connected to the partition, and the two ends of the reset spring are respectively fixedly connected to the cover plate and the partition; the guide member is fixed inside the mounting hole, and the outer wall of the straight plug-in and the inner hole wall of the guide member are provided with a sliding spline; the two ends of the straight plug-in are respectively a pressing end and a driving rotating end, and the pressing end of the straight plug-in is exposed in the gas processing chamber, and the outer wall of the driving rotating end of the straight plug-in is provided with a driving rotating shaft, and a blind hole is provided at one end of the swing shaft adjacent to the gas processing chamber, and a spiral path is provided on the inner wall of the blind hole, and the rotating shaft of the straight plug-in is slidingly located inside the spiral path;

[0015] Among them, when the linear drive device drives the dust collecting tube bag to unfold in the forward direction, the switching shaft of the movable disk can push the straight plug-in, and the movable disk fits tightly with the partition while the cover plate covers the air outlet; when the linear drive device drives the dust collecting tube bag to fold in the reverse direction, the return spring moves the cover plate away from the air outlet and the cover plate is blocked by the limiting component and stops moving.

[0016] Furthermore, the mouth connection structure also includes a rubber cover, which is used to prevent dust in the gas processing chamber from entering the mounting through hole; the rubber cover is specifically annular, and the inner and outer contours of the annular rubber cover are respectively fixed to the outer periphery of the straight plug-in and the inner periphery of the mounting through hole; the annular rubber cover is sunken and bent toward the clean gas chamber, thereby increasing the extension distance of the rubber cover.

[0017] Furthermore, a fan is installed on the exhaust pipe, and is used to send the purified gas out of the exhaust pipe.

[0018] Furthermore, an ash hopper is provided at the bottom of the gas processing chamber, and a detachable plugging cover is provided at the bottom of the ash hopper.

[0019] Furthermore, the linear drive device is a cylinder or a hydraulic cylinder, one end of the cylinder body of the cylinder or the hydraulic cylinder is fixed to the outer wall of the box body, the piston rod is fixed to the movable plate, and the movement of the piston rod can drive the movable plate to move.

[0020] Furthermore, the dust discharge pipe and the gas processing chamber have multiple dust inlets, each of which is connected to the lower edge of the port of the fixed end of a single dust collecting pipe bag; the dust discharge pipe also has a detachable dust collecting bag at the bottom, and the dust collecting bag is made of breathable material;

[0021] The dust collecting tube bag is made of airtight material; when the rubber cover covers the air port and the movable plate is tightly fitted with the partition, the back-blowing airflow pipeline, the dust collecting tube bag and the dust discharge pipe form an airtight airflow channel, and the airflow delivered by the back-blowing device blows the dust on the surface of the filter cartridge onto the outer surface of the dust collecting tube bag, and the airflow flows along the dust collecting tube bag and the dust discharge pipe and is collected into the dust collecting bag of the dust discharge pipe;

[0022] In addition, a blocking cover is arranged on the dust discharge pipe, the blocking cover can cover the dust collecting bag and the mouth of the blocking cover is threadedly connected with the dust discharge pipe.

[0023] Furthermore, a sealing flange ring is fixedly arranged on the partition plate, and the sealing flange ring covers the outer side of one end of the filter cartridge;

[0024] When the dust collecting tube bag is fully unfolded, the moving disk is tightly fitted with the end face of the sealing flange ring, and a rubber layer is arranged on the end faces of the moving disk and the sealing flange ring in contact, so as to increase the sealing performance between the two.

[0025] The beneficial effects of the present invention are:

[0026] When the linear drive device drives the dust collecting tube bag to unfold in the forward direction, the switching shaft of the movable disk can push the straight plug-in unit, and the movable disk fits tightly with the partition plate while the cover plate covers the air port. Then the air outlet of the back-blowing airflow pipeline is connected with the inside of the filter cartridge through the air port and the exhaust port of the filter cartridge, thereby improving the sealing degree between the air outlet of the back-blowing device and the mouth of the filter cartridge, so as to allow all the airflow of the back-blowing device to enter the inside of the filter cartridge, thereby allowing all the back-blowing airflow to enter the filter cartridge to play a dust cleaning role, thereby achieving the purpose of improving the dust blowing efficiency of the back-blowing airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2for Figure 1 A left side view of the middle partition 110;

[0029] Figure 3 for Figure 2 Partial cross-sectional view at AA in the middle;

[0030] Figure 4 for Figure 1 Right view of the middle box;

[0031] Reference table of reference numerals:

[0032] Box body 100, partition plate 110, gas inlet 111, mounting through hole 112, clean gas chamber 120, gas processing chamber 130, ash hopper 131, sealing flange ring 132;

[0033] Exhaust pipe 200, fan 300, filter cartridge 400, dust collecting tube bag 500, moving plate 600, switching shaft 610, linear drive device 700;

[0034] Mouth connection structure 800, swing shaft 810, spiral path 811, connection component 820, cover plate 830, straight plug-in 840, drive rotation shaft 841, guide member 850, rubber cover 860, return spring 870, limit component 880;

[0035] Dust discharge pipe 900, dust inlet 910, dust collection bag 920, and blocking cover 930;

[0036] Backflush gas flow line 1000. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, wherein the same components are represented by the same reference numerals.

[0038] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0039] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] Considering the background technology, during the back-blowing cleaning process, there is a lack of sealing structure between the air outlet of the back-blowing device and the mouth of the filter cartridge, the first part of the back-blowing airflow is directly discharged through the air outlet of the filter cartridge dust collector, and only the second part of the back-blowing airflow enters the filter cartridge from the filter cartridge mouth for soot blowing; that is, the first part of the back-blowing airflow does not play a soot blowing role, thereby reducing the soot blowing efficiency of the back-blowing airflow. For this application, a mouth connection structure 800 is provided. During the back-blowing cleaning process, the mouth connection structure 800 is used to improve the sealing between the air outlet of the back-blowing device and the mouth of the filter cartridge, so that all the back-blowing airflow enters the filter cartridge to play a soot cleaning role, thereby improving the soot blowing efficiency of the back-blowing airflow.

[0041] Refer to the attached figure, a dust collector for a shot blasting machine,

[0042] The partition 110 in the box body 100 separates an independent clean air chamber 120 and a gas processing chamber 130; the air inlet 140 is connected to the gas processing chamber 130, and the gas to be purified can enter the gas processing chamber 130 through the air inlet 140, and then the gas to be purified is subsequently filtered in the gas processing chamber 130.

[0043] A plurality of filter cartridges 400 are provided and arranged up and down in the gas processing chamber 130; the exhaust port of the filter cartridge 400 is connected to the clean gas chamber 120 through the air port 111 of the partition 110. The gas entering the gas processing chamber 130 from the air inlet 140 is filtered by the filter component on the periphery of the filter cartridge 400, and the filtered gas enters the filter cartridge 400, and then enters the clean gas chamber 120 from the exhaust port of the filter cartridge 400; finally, it is discharged from the exhaust pipe 200 connected to the clean gas chamber 120.

[0044] The dust collecting tube bag 500 is inserted into the outer circumference of a single filter cartridge 400, and the two ends of the dust collecting tube bag 500 are respectively a fixed end and a movable end; the fixed end of the dust collecting tube bag 500 is fixed to the inner wall of the gas processing chamber 130. After the dust collecting tube bag 500 is unfolded, the dust collecting tube bag 500 can completely cover the single filter cartridge 400.

[0045] The movable plate 600 is fixedly connected to the movable end of the dust collecting tube bag 500 .

[0046] The linear drive device 700 can drive the moving plate 600 to reciprocate linearly, so as to switch between the folded state and the unfolded state of the dust collecting tube bag 500. The function of switching between the folded state and the unfolded state is that during the normal dust removal operation of the filter cartridge 400, the folded dust collecting tube bag 500 does not cover the filter cartridge 400; when the filter cartridge 400 is back-blown and cleaned, the unfolded dust collecting tube bag 500 covers the filter cartridge 400, so that the dust blown off the surface of the filter cartridge 400 is collected in the dust collecting tube bag 500.

[0047] The back-blowing device is used to blow air into the filter cartridge 400 to blow the dust attached to the outer surface of the filter cartridge 400 into the unfolded dust collecting tube bag 500. The exhaust pipeline of the back-blowing device is a back-blowing airflow pipeline 1000, which is a flexible pipeline; the back-blowing airflow pipeline 1000 extends into the clean air chamber 120. The back-blowing device can be a fan, and the back-blowing device is placed outside the clean air chamber 120.

[0048] See also Figure 2 , Figure 3 , Figure 2 for Figure 1 A left side view of the middle partition 110; Figure 3 for Figure 2Partial cross-sectional view at AA in the middle; the mouth connection structure 800 can cover the air port 111 (or the exhaust port of the filter cartridge 400) and allow the back-blowing airflow pipeline 1000 to communicate with the air port 111. The mouth connection structure 800 includes a cover plate 830 and a flip assembly; the cover plate 830 is in close contact with the surface of the partition plate 110 in the clean air chamber 120, and the air outlet of the back-blowing airflow pipeline 1000 is fixed and penetrates the cover plate 830. When the cover plate 830 covers the air port 111, the air outlet of the back-blowing airflow pipeline 1000 is communicated with the air port 111. The flip assembly penetrates and is installed with the partition 110, that is, the flip assembly is present in the clean gas chamber 120 and the gas processing chamber 130; the flip assembly is used to drive the cover plate (830) to rotate to cover the gas port (111) and allow the backflush gas flow pipeline (1000) to communicate with the gas port (111), and the flip assembly includes a swing shaft 810, a connecting component 820, a straight plug-in 840, a guide member 850, a rubber cover 860, and a reset spring 870; the partition 110 is provided with a through-mounting through hole 1 12; the swing shaft 810 is rotatably set in the mounting through hole 112, and the connecting component 820 fixes the swing shaft 810 and the cover plate 830 together; the limiting component 880 is fixedly connected to the partition 110, and the two ends of the return spring 870 are fixedly connected to the cover plate 830 and the partition 110 respectively; the guide member 850 is fixed inside the mounting through hole 112, and the outer wall of the straight plug-in 840 and the inner hole wall of the guide member 850 are provided with a spline for sliding fit, that is, the straight plug-in 840 can only slide in a straight line. The two ends of the straight plug-in 840 are a pressing end and a driving rotating end, respectively. The pressing end of the straight plug-in 840 is exposed in the gas processing chamber 130. The outer wall of the driving rotating end of the straight plug-in 840 is provided with a driving rotating shaft 841. The swing shaft 810 is adjacent to one end of the gas processing chamber 130 and is provided with a blind hole. The inner wall of the blind hole is provided with a spiral path 811. The rotating shaft 841 of the straight plug-in 840 slides inside the spiral path 811. During the straight plug-in 840's linear reciprocating motion along the guide member 850, the linearly moving rotating shaft 841 moves inside the spiral path 811, thereby driving the swing shaft 810 and the cover plate 830 to swing in both directions.

[0049] When the linear drive device (700) drives the dust collecting tube bag (500) to unfold in the forward direction, the movable plate (600) squeezes the flip assembly, so that the flip assembly drives the cover plate (830) to cover the air outlet (111) and allows the back-blowing airflow pipeline (1000) to communicate with the air outlet (111); when the linear drive device (700) drives the dust collecting tube bag (500) to fold in the reverse direction, the cover plate (830) of the mouth connection structure (800) is evacuated from the air outlet (111). Specifically, the movable disk 600 is fixedly provided with a switching shaft 610; when the linear drive device 700 drives the dust collecting tube bag 500 to unfold in a positive direction, the linear drive device 700 drives the movable disk 600 in a positive direction to drive the movable end of the dust collecting tube bag 500 to move, and the switching shaft 610 of the movable disk 600 can push the straight plug 840, and the movable disk 600 is tightly fitted with the partition 110 while the cover plate 830 covers the air port 111, and then the air outlet of the back-blowing airflow pipeline 1000 is connected with the inside of the filter cartridge 400 through the air port 111 and the exhaust port of the filter cartridge 400, so as to improve the sealing degree between the air outlet of the back-blowing device and the mouth of the filter cartridge, so as to allow all the airflow of the back-blowing device to enter the inside of the filter cartridge, so as to allow all the back-blowing airflow to enter the filter cartridge to play a dust cleaning role, thereby improving the dust blowing efficiency of the back-blowing airflow. When the linear drive device 700 reverses the folding process of the dust collecting tube bag 500, the linear drive device 700 reversely drives the movable disk 600 to move toward the fixed end of the dust collecting tube bag 500, the return spring 870 moves the cover plate 830 away from the air outlet 111, and the cover plate 830 is blocked by the limiting component 880 from continuing to move, and at the same time, because the spiral path 811 follows the rotation of the swing shaft 810, the rotation of the spiral path 811 forces the straight plug 840 to move toward the gas processing chamber 130 to the initial position of the straight plug 840. In other words, when the linear drive device 700 forwardly drives the dust collecting tube bag 500 to unfold, the movable disk 600 squeezes the mouth connection structure 800 to cover the air outlet 111 and allows the back-blowing air flow pipeline 1000 to communicate with the air outlet 111; when the linear drive device 700 reverses the folding process of the dust collecting tube bag 500, the mouth connection structure 800 can evacuate the air outlet 111.

[0050] To sum up, when the linear drive device 700 drives the dust collecting tube bag 500 to unfold in a positive direction, the linear drive device 700 drives the movable disk 600 in a positive direction to drive the movable end of the dust collecting tube bag 500 to move, and the switching shaft 610 of the movable disk 600 can push the straight plug 840. The movable disk 600 fits tightly with the partition 110 while the cover plate 830 covers the air port 111, and then the air outlet of the back-blowing airflow pipeline 1000 is connected with the interior of the filter cartridge 400 through the air port 111 and the exhaust port of the filter cartridge 400, thereby improving the sealing degree between the air outlet of the back-blowing device and the mouth of the filter cartridge, so as to allow the airflow of the back-blowing device to enter the interior of the filter cartridge completely, and then a larger atmospheric pressure and airflow enter the interior of the filter cartridge, thereby finally improving the cleaning effect of the back-blowing device on the filter cartridge.

[0051] Furthermore, a rubber layer is provided on the end surface of the cover plate 830 in contact with the partition plate 110 to improve the sealing degree between the end surface of the cover plate 830 and the partition plate 110 .

[0052] Furthermore, the mouth connection structure 800 also includes a rubber cover 860, and the rubber cover 860 is used to prevent dust in the gas processing chamber 130 from entering the mounting hole 112, thereby affecting the movement of the swing shaft 810 and the straight plug-in 840; the rubber cover 860 is specifically annular, and the inner and outer contours of the annular rubber cover 860 are respectively fixed to the outer periphery of the straight plug-in 840 and the inner periphery of the mounting hole 112; preferably, the annular rubber cover 860 is sunken and bent toward the direction of the clean gas chamber 120, thereby increasing the extension distance of the rubber cover 860; in this way, it can be ensured that during the linear movement of the straight plug-in 840, the rubber cover 860 only undergoes elastic deformation and its structure will not be damaged.

[0053] Furthermore, the fan 300 is installed on the exhaust pipe 200 , and is used to send the purified gas out of the exhaust pipe 200 .

[0054] Furthermore, an ash hopper 131 is provided at the bottom of the gas processing chamber 130 , and large particles of impurities will directly fall into the ash hopper 131 in the gas processing chamber 130 . A detachable plugging cover is provided at the bottom of the ash hopper 131 .

[0055] Furthermore, the linear drive device 700 is a cylinder or a hydraulic cylinder, one end of the cylinder body of the cylinder or the hydraulic cylinder is fixed to the outer wall of the box body 100, the piston rod of the cylinder or the hydraulic cylinder directly extends into the gas processing chamber 130, the piston rod is fixed to the movable disk 600, and the movement of the piston rod can drive the movable disk 600 to move.

[0056] Furthermore, the dust discharge pipe 900 and the gas treatment chamber 130 have a plurality of dust inlets 910, each of which is connected to the lower edge of the fixed end of a single dust collecting pipe bag 500. A detachable dust collecting bag 920 is also provided at the bottom of the dust discharge pipe 900, and the dust collecting bag 920 is made of a breathable material.

[0057] The dust collecting tube bag 500 is made of airtight material; when the rubber cover 860 covers the air port 111 and the movable plate 600 fits tightly against the partition 110, the back-blowing airflow pipeline 1000, the dust collecting tube bag 500, and the dust discharge pipe 900 form an airtight airflow channel. The airflow delivered by the back-blowing device blows the dust on the surface of the filter cartridge 400 onto the outer surface of the dust collecting tube bag 500, and the airflow flows along the dust collecting tube bag 500 and the dust discharge pipe 900 and converges into the dust collecting bag 920 of the dust discharge pipe 900.

[0058] In addition, a sealing cover 930 is provided on the dust emission pipe 900, and the sealing cover 930 can cover the dust bag 920 and the mouth of the sealing cover 930 is threadedly connected to the dust emission pipe 900; on the one hand, during the normal dust removal process of the dust collector, the sealing cover 930 is threadedly connected to the dust emission pipe 900, and the purified gas will not leak from the dust emission pipe 900; on the other hand, during the backblowing cleaning of the filter cartridge in the dust collector, the sealing cover 930 of the dust emission pipe 900 is removed, and the filter cartridge 400 is blown away and directly enters the dust bag 920.

[0059] Furthermore, a sealing flange ring 132 is fixedly provided on the partition plate 110, and the sealing flange ring 132 covers the outer side of one end of the filter cartridge 400;

[0060] When the dust collecting tube bag 500 is fully unfolded, the moving plate 600 is tightly fitted with the end surface of the sealing flange ring 132, and a rubber layer is provided on the end surface of the moving plate 600 in contact with the sealing flange ring 132 to increase the sealing performance therebetween.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust collector for a shot blasting machine, comprising a housing (100), a filter cartridge (400), and a dust collecting tube bag (500); the housing (100) is divided into a clean air chamber (120) and a gas processing chamber (130) by a partition (110); an air inlet (140) is connected to the gas processing chamber (130); a plurality of filter cartridges (400) are arranged up and down in the gas processing chamber (130); a fixed end of the dust collecting tube bag (500) is fixed to an inner wall of the gas processing chamber (130); It is characterized in that Also includes: A movable plate (600) fixedly connected to a movable end of the dust collecting tube bag (500); A linear drive device (700) capable of driving the movable plate (600) to perform linear reciprocating motion, so as to switch the dust collecting tube bag (500) between a folded state and an unfolded state; A back-blowing device, wherein the exhaust pipeline is a back-blowing airflow pipeline (1000), and the back-blowing airflow pipeline (1000) is a flexible pipeline; the back-blowing airflow pipeline (1000) extends into the clean air chamber (120); The mouth connection structure (800) comprises a cover plate (830) and a flip assembly; the flip assembly penetrates and is mounted on the partition plate (110); the back-blowing airflow pipeline (1000) penetrates the cover plate (830) and the two are fixed; the flip assembly can drive the cover plate (830) to rotate and cover the air port (111) and allow the back-blowing airflow pipeline (1000) to communicate with the air port (111); When the linear drive device (700) drives the dust collecting tube bag (500) forward to unfold, the movable plate (600) squeezes the flip assembly, so that the flip assembly drives the cover plate (830) to cover the air port (111) and allows the back-blowing airflow pipeline (1000) to communicate with the air port (111); when the linear drive device (700) drives the dust collecting tube bag (500) backward to fold, the cover plate (830) of the mouth connection structure (800) is evacuated from the air port (111); The flip assembly comprises a swing shaft (810), a connecting component (820), a straight plug-in (840), a guide (850), a rubber cover (860), and a reset spring (870); the cover plate (830) is in close contact with the surface of the partition plate (110) in the clean air chamber (120), and the air outlet of the back-blowing air flow pipeline (1000) passes through the cover plate (830); the partition plate (110) is provided with a through-going mounting through hole (112); the swing shaft (810) is rotatably arranged in the mounting through hole (112), and the connecting component (820) fixedly connects the swing shaft (810) and the cover plate (830) as a whole; the limiting component (880) is fixedly connected to the partition plate (110), and the two ends of the reset spring (870) are respectively connected to the cover plate (830). ), and the partition (110) are fixedly connected; the guide member (850) is fixed inside the mounting through hole (112), and the outer wall of the straight plug (840) and the inner hole wall of the guide member (850) are provided with slidably matched splines; the two ends of the straight plug (840) are respectively a pressing end and a driving rotating end, the pressing end of the straight plug (840) is exposed inside the gas processing chamber (130), the outer wall of the driving rotating end of the straight plug (840) is provided with a driving rotating shaft (841), and the swing shaft (810) is provided with a blind hole at one end adjacent to the gas processing chamber (130), the inner wall of the blind hole is provided with a spiral path (811), and the rotating shaft (841) of the straight plug (840) is slidably located inside the spiral path (811); The moving disk (600) is fixedly provided with a switching shaft (610); When the linear drive device (700) drives the dust collecting tube bag (500) forward to unfold, the switching shaft (610) of the movable disk (600) can push the straight plug-in unit (840), and the movable disk (600) and the partition plate (110) are tightly fitted together, while the cover plate (830) covers the air outlet (111); when the linear drive device (700) drives the dust collecting tube bag (500) backward to fold, the return spring (870) moves the cover plate (830) away from the air outlet (111), and the cover plate (830) is blocked by the limiting component (880) and stops moving.

2. A dust collector for a shot blasting machine according to claim 1, characterized in that: The mouth connection structure (800) further comprises a rubber cover (860), wherein the rubber cover (860) is used to prevent dust in the gas processing chamber (130) from entering the mounting through hole (112); the rubber cover (860) is specifically annular, and the inner and outer contours of the annular rubber cover (860) are respectively fixed to the outer periphery of the straight plug (840) and the inner periphery of the mounting through hole (112); the annular rubber cover (860) is sunken and bent inwardly in the direction of the clean gas chamber (120), thereby increasing the extension distance of the rubber cover (860).

3. A dust collector for a shot blasting machine according to claim 1, characterized in that: The fan (300) is installed on the exhaust pipe (200) and is used to send the purified gas out of the exhaust pipe (200).

4. A dust collector for a shot blasting machine according to claim 1, characterized in that: An ash hopper (131) is provided at the bottom of the gas processing chamber (130), and a detachable plugging cover is provided at the bottom of the ash hopper (131).

5. The dust collector of a shot blasting machine according to claim 1, characterized in that: The linear drive device (700) is a cylinder or a hydraulic cylinder, one end of the cylinder body of the cylinder or the hydraulic cylinder is fixed to the outer wall of the box body (100), the piston rod is fixed to the movable plate (600), and the movement of the piston rod can push the movable plate (600) to move.

6. A dust collector for a shot blasting machine according to claim 1, characterized in that: The dust discharge pipe (900) and the gas processing chamber (130) have a plurality of dust inlets (910), and each dust inlet (910) is connected to the lower edge of the port of the fixed end of a single dust collecting pipe bag (500); a detachable dust collecting bag (920) is also provided at the bottom of the dust discharge pipe (900), and the dust collecting bag (920) is made of a breathable material; The dust collecting tube bag (500) is made of an airtight material; when the rubber cover (860) covers the air port (111) and the movable plate (600) is tightly fitted to the partition plate (110), the back-blowing airflow pipeline (1000), the dust collecting tube bag (500) and the dust discharge pipe (900) form an airtight airflow channel, and the airflow delivered by the back-blowing device blows the dust on the surface of the filter cartridge (400) onto the outer surface of the dust collecting tube bag (500), and the airflow flows along the dust collecting tube bag (500) and the dust discharge pipe (900) and is collected into the dust collecting bag (920) of the dust discharge pipe (900); In addition, a blocking cover (930) is provided on the dust discharge pipe (900), the blocking cover (930) can cover the dust collection bag (920), and the mouth of the blocking cover (930) is threadedly connected to the dust discharge pipe (900).

7. A dust collector for a shot blasting machine according to claim 6, characterized in that: A sealing flange ring (132) is fixedly disposed on the partition plate (110), and the sealing flange ring (132) covers the outer side of one end of the filter cartridge (400); When the dust collecting tube bag (500) is fully unfolded, the movable plate (600) is tightly fitted with the end surface of the sealing flange ring (132), and a rubber layer is provided on the end surfaces of the movable plate (600) and the sealing flange ring (132) in contact with each other, thereby increasing the sealing performance between the two.

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