A pulse back-blowing ash cleaning device of a bag-type dust collector used in a crushing plant of a coal preparation plant

Abstract

The utility model provides a kind of pulse backflushing dust cleaning device of cloth bag dust collector for coal preparation plant crushing workshop.It relates to the technical field of pulse backflushing.The pulse backflushing dust cleaning device of cloth bag dust collector for coal preparation plant crushing workshop includes dust collector top cover, the one side of dust collector top cover is equipped with pulse gas package, multiple pipe joints are fixedly installed on pulse gas package, the top end of multiple pipe joints is fixedly installed with the gas inlet of pulse valve, the gas outlet of multiple pulse valves is fixedly installed with the one end of breather tube, the other end of multiple breather tubes is extended to the dust collector top cover and is fixedly connected with the one side of dust collector top cover, multiple exhaust pipes are equipped in the dust collector top cover, and multiple backflushing nozzles are fixedly installed in the bottom of multiple exhaust pipes.The utility model can adjust the distance between nozzle and filter cartridge according to the specific parameters of filter cartridge, and improve the service life of filter cartridge.

Description

Technical Field

[0001] This utility model relates to the field of pulse backflushing technology, specifically a pulse backflushing cleaning device for a bag filter dust collector used in a coal preparation plant crushing workshop. Background Technology

[0002] At present, in the coal mining and preparation process, large coal raw materials need to be crushed into uniform small-volume coal to facilitate subsequent processing and transportation. Therefore, coal preparation plants are usually equipped with crushing workshops for crushing work. During the crushing process, a large amount of dust particles will be mixed into the surrounding air. In order to reduce the damage to the air environment, bag filters are generally installed to purify the air in the crushing workshop to achieve safe emissions.

[0003] In practical use, it has been found that most of the nozzles used to backflush the filter cartridges in common baghouse dust collectors are in fixed positions, meaning the distance between the nozzle and the filter cartridge is fixed. However, filter cartridges of different materials and thicknesses have different pressure resistance and elasticity. The distance between the pulse valve blowpipe and the filter cartridge needs to be determined according to the specific parameters of the filter cartridge. This is to minimize the risk of the filter cartridge being damaged by high-pressure gas and reducing its service life. Fixed nozzle positions are difficult to adjust according to the specific parameters of the filter cartridge, which can easily cause damage to the filter cartridge.

[0004] Therefore, it is necessary to provide a new pulse backflushing cleaning device for baghouse dust collectors in coal preparation plant crushing workshops to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a pulse back-flushing cleaning device for a bag filter used in a coal preparation plant crushing workshop, which can adjust the distance between the nozzle and the filter cartridge according to the specific parameters of the filter cartridge, thereby improving the service life of the filter cartridge.

[0006] To solve the above-mentioned technical problems, the pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop provided by this utility model includes: a dust collector top cover; a pulse air manifold is provided on one side of the dust collector top cover; multiple pipe joints are fixedly installed on the pulse air manifold; an air inlet port of a pulse valve is fixedly installed at the top of each of the multiple pipe joints; one end of a vent pipe is fixedly installed on the air outlet port of each of the multiple pulse valves; and the other end of each of the multiple vent pipes extends into the dust collector top cover and is fixedly connected to one side of the dust collector top cover. The cover is equipped with multiple exhaust pipes, each with a back-blowing nozzle fixedly mounted at its bottom. A secondary connecting pipe is slidably mounted on each of the exhaust pipes. One end of a main connecting pipe is fixedly mounted on the top of each exhaust pipe. The other ends of the main connecting pipes are connected to one end of each secondary connecting pipe via flanges. Sealing rings are fixedly mounted on the inner walls of each secondary connecting pipe, with the inner walls of the sealing rings fitting snugly against the exhaust pipes. The dust collector top cover is equipped with a height adjustment mechanism to adjust the height of the back-blowing nozzles.

[0007] Preferably, the height adjustment mechanism includes an adjustment screw, which is rotatably mounted on the top of the dust collector top cover. The bottom end of the adjustment screw extends into the dust collector top cover, and a retaining beam plate is threaded onto the adjustment screw. Multiple main connecting pipes are fixedly connected to the retaining beam plate.

[0008] Preferably, two guide rods are fixedly installed on the inner top wall of the dust collector cover. Both guide rods pass through the collecting beam plate and are slidably connected to the collecting beam plate. A protrusion is fixedly installed on the top of the dust collector cover. A fixing screw is threaded on the protrusion, and the end of the fixing screw abuts against the adjusting screw.

[0009] Preferably, a load-bearing baffle is fixedly installed on one side of the outer wall of the dust collector top cover, the pulse air manifold is fixedly connected to the load-bearing baffle, and an exhaust pipe is fixedly installed on the outer wall of the dust collector top cover away from the pulse air manifold.

[0010] Preferably, each of the plurality of sealing rings has a compression ring groove at its bottom, each of the plurality of auxiliary connecting pipes has an electric push rod fixedly installed on its outer wall, each of the plurality of electric push rods has a connecting piece fixedly installed on its output shaft, each of the plurality of vent pipes passes through the plurality of connecting pieces and slides in contact with the corresponding connecting pieces, each of the plurality of connecting pieces has a compression ring fixedly installed on its top, each of the plurality of compression rings is adapted to the plurality of compression ring grooves, and each of the plurality of vent pipes passes through the plurality of compression rings without contacting the inner wall of the compression rings.

[0011] Preferably, all of the ventilation tubes are marked with graduation lines.

[0012] Preferably, a sealing bolt is threaded onto the top of the dust collector top cover, and the bottom end of the sealing bolt extends into the dust collector top cover and is rotatably mounted with a limiting baffle. One side of the limiting baffle contacts one side of the inner wall of the dust collector top cover, and the limiting baffle is located above the vent pipe.

[0013] Compared with related technologies, the pulse back-flushing cleaning device for baghouse dust collectors in coal preparation plant crushing workshops provided by this utility model has the following beneficial effects:

[0014] This invention features a sliding secondary connecting pipe on the vent pipe, allowing for adaptive adjustment of the backflush nozzle height by rotating an adjusting screw. This enables it to be used with filter cartridges of different materials, thicknesses, and inner diameters, offering high flexibility. Furthermore, by adjusting the height of the backflush nozzle, different filter cartridges can be adapted to airflow of corresponding intensity, minimizing damage to the filter cartridges from strong airflows and preventing poor dust removal due to weak airflows. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop provided by this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the assembly structure of the vent pipe, auxiliary connecting pipe, main connecting pipe and exhaust pipe in this utility model;

[0018] Figure 4 This is a bottom view of the dust collector top cover in this utility model.

[0019] Figure 5 This is a schematic diagram showing the disassembled state of the sealing bolts and the dust collector top cover in this utility model;

[0020] Figure 6 This is a cross-sectional view of the vent pipe and the auxiliary connecting pipe in this utility model.

[0021] The following are labeled in the diagram: 1. Dust collector top cover; 2. Exhaust pipe; 3. Load-bearing folding plate; 4. Pulse air manifold; 5. Pipe joint; 6. Pulse valve; 7. Vent pipe; 8. Exhaust pipe; 9. Backflush nozzle; 10. Main connecting pipe; 11. Secondary connecting pipe; 12. Adjusting screw; 13. Solidifying beam plate; 14. Sealing ring; 15. Tightening ring groove; 16. Electric push rod; 17. Connecting plate; 18. Extrusion ring; 19. Sealing bolt; 20. Limiting baffle. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figures 1-6 The pulse jet cleaning device for a bag filter in a coal preparation plant's crushing workshop includes: a dust collector top cover 1; a pulse jet manifold 4 on one side of the top cover 1; multiple pipe joints 5 fixedly installed on the pulse jet manifold 4; an air inlet port of a pulse valve 6 fixedly installed at the top of each pipe joint 5; an air vent pipe 7 fixedly installed at the outlet port of each pulse valve 6; and the other end of each air vent pipe 7 extending into the top cover 1 and fixedly connected to one side of the top cover 1. Multiple exhaust pipes 8 are located inside the top cover 1, and multiple back-jet nozzles 9 are fixedly installed at the bottom of each exhaust pipe 8. Multiple vent pipes 7 are slidably mounted with auxiliary connecting pipes 11, and multiple exhaust pipes 8 are each fixedly mounted with one end of a main connecting pipe 10. The multiple main connecting pipes 10 and multiple auxiliary connecting pipes 11 are connected by flanges and can be separated, so that the auxiliary connecting pipes 11 can be removed separately for maintenance and replacement in the later stage. Each auxiliary connecting pipe 11 is fixedly mounted with a sealing ring 14 on its inner wall. The inner wall of the sealing ring 14 fits against the vent pipe 7 to achieve a sealing effect. The dust collector top cover 1 is equipped with a height adjustment mechanism, which can adjust the height position of the back-blowing nozzle 9 according to different filter cartridges to achieve a good fit.

[0024] The height adjustment mechanism mentioned above includes an adjusting screw 12 rotatably mounted on the top of the dust collector cover 1, with its bottom end extending into the dust collector cover 1. A retaining beam plate 13 is threaded onto the adjusting screw 12, and multiple main connecting pipes 10 are fixedly connected to the retaining beam plate 13. Furthermore, two guide rods are fixedly installed on the top inner wall of the dust collector cover 1, both of which penetrate the retaining beam plate 13 and are slidably connected to it. This forms a limiting guide, ensuring that the retaining beam plate 13 can only move linearly up and down. A protrusion is fixedly installed on the top of the dust collector cover 1, with a retaining screw threaded onto it. The end of the retaining screw abuts against the adjusting screw 12, creating a pressing contact that prevents the adjusting screw 12 from rotating. In addition, scale lines are marked on multiple vent pipes 7, allowing for precise adjustment of the height position of the back-blowing nozzle 9 by observing the direction of the bottom end face of the auxiliary connecting pipe 11 on the scale lines.

[0025] In this method, in order to form a stable connection with the pulse air manifold 4, a load-bearing baffle 3 is fixedly installed on one side of the outer wall of the dust collector top cover 1. The pulse air manifold 4 is fixedly connected to the load-bearing baffle 3. An exhaust pipe 2 is fixedly installed on the outer wall of the dust collector top cover 1 away from the pulse air manifold 4.

[0026] In this method, to ensure the sealing performance between the vent pipe 7 and the auxiliary connecting pipe 11, a compression ring groove 15 is provided at the bottom of each of the multiple sealing rings 14. The inner wall of the compression ring groove 15 gradually slopes to the left from bottom to top, thereby narrowing the internal space from bottom to top. Electric push rods 16 are fixedly installed on the outer walls of each of the multiple auxiliary connecting pipes 11, and connecting pieces 17 are fixedly installed on the output shafts of each of the multiple electric push rods 16. Multiple vent pipes 7 pass through multiple connecting pieces 17 and slide in contact with the corresponding connecting pieces 17. Each of the tops is fixedly equipped with a compression ring sleeve 18, and multiple compression ring sleeves 18 are adapted to multiple compression ring grooves 15 respectively. Multiple vent pipes 7 pass through multiple compression ring sleeves 18 respectively without contacting the inner wall of the compression ring sleeve 18. By extending the output shaft of the electric push rod 16, the compression ring sleeve 18 can be raised and enter the compression ring groove 15. As the internal space of the compression ring groove 15 gradually narrows, the compression ring sleeve 18 will expand the compression ring groove 15, so that the inner wall of the sealing ring sleeve 14 and the outer wall of the vent pipe 7 are tightly in contact, forming a reliable sealing effect.

[0027] In this method, during the daily use of the bag filter, to prevent separation between the vent pipe 7 and the auxiliary connecting pipe 11, a sealing bolt 19 is threaded onto the top of the dust collector top cover 1. Its bottom end extends into the dust collector top cover 1 and is rotatably fitted with a limiting baffle 20. One side of the limiting baffle 20 contacts the inner wall of one side of the dust collector top cover 1. The limiting baffle 20 is located above the vent pipe 7, forming a maximum blocking position to prevent separation between the vent pipe 7 and the auxiliary connecting pipe 11. Furthermore, the sealing bolt... A spring washer is placed between the screw head at the top of bolt 19 and the top end face of the dust collector top cover 1 to ensure the tightness of the two. When the auxiliary connecting pipe 11 needs to be removed separately for maintenance and replacement in the later stage, the sealing bolt 19 can be screwed on to make the limiting baffle 20 rise to the state of being in contact with the top inner wall of the dust collector top cover 1. At this time, the distance between the limiting baffle 20 and the auxiliary connecting pipe 11 is large. Then, by rotating the adjusting screw 12, the auxiliary connecting pipe 11 is moved upward, and finally it is separated from the vent pipe 7. Then it can be separated from the main connecting pipe 10.

[0028] The working principle of the pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop provided by this utility model is as follows:

[0029] In the initial state, the output shafts of all electric actuators 16 are extended;

[0030] In use, first adjust the height of the back-blowing nozzle 9 according to the height of the top end face of the filter cartridge in the lower half of the bag filter. During adjustment, first rotate the fixing screw in the reverse direction to separate it from the adjusting screw 12. Then, rotate the adjusting screw 12 clockwise or counterclockwise. Under the action of the two guide rods, the collecting beam plate 13 will raise or lower multiple main connecting pipes 10. At this time, observe the position between the bottom end face of the auxiliary connecting pipe 11 and the scale line on the vent pipe 7. When it moves to the designated position, stop the adjustment. The screw 12 rotates and then the locking screw is tightened again. Then, the output shafts of multiple electric push rods 16 retract. During the retraction process, multiple compression rings 18 rise and enter the corresponding compression ring grooves 15. As the internal space of the compression ring grooves 15 gradually decreases from bottom to top, the compression rings 18 will exert a strong compression on the sealing rings 14, which will deform the inner side of the sealing rings 14, so that the inner wall of the sealing rings 14 will tightly abut against the outer wall of the vent pipe 7, forming an effective sealing effect.

[0031] Then, the dust collector top cover 1 is fixedly installed on the top of the lower half of the bag dust collector to form a complete bag dust collector, which can then absorb and purify the polluted air in the crushing workshop.

[0032] In subsequent use, when the filter cartridge needs to be backflushed cleaned, activating the pulse valve 6 will allow a powerful airflow to be discharged into the exhaust pipe 8 through the vent pipe 7, the auxiliary connecting pipe 11 and the main connecting pipe 10 in sequence, and finally sprayed out through the backflushing nozzle 9, thereby cleaning the dust and impurities attached to the surface of the filter cartridge.

[0033] When using filter cartridges of different materials or thicknesses, the height of the backflush nozzle 9 can be adjusted according to the same steps described above to achieve a suitable fit.

[0034] Compared with related technologies, the pulse back-flushing cleaning device for baghouse dust collectors in coal preparation plant crushing workshops provided by this utility model has the following beneficial effects:

[0035] This utility model provides a pulse back-blowing cleaning device for a bag filter in a coal preparation plant crushing workshop. By setting a sliding secondary connecting pipe 11 on the air pipe 7, the height of the back-blowing nozzle 9 can be adaptively adjusted by rotating the adjusting screw 12. This allows it to be suitable for filter cartridges of different materials, thicknesses, and inner diameters, providing high flexibility. At the same time, by adjusting the height of the back-blowing nozzle 9, different filter cartridges can be adapted to airflows of corresponding intensities, thereby minimizing damage to the filter cartridges caused by strong airflows and avoiding the problem of poor cleaning effect caused by weak airflows.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pulse-jet cleaning device for a baghouse dust collector used in a coal preparation plant's crushing workshop, comprising a dust collector top cover, characterized in that, A pulse jet manifold is provided on one side of the dust collector's top cover. Multiple pipe joints are fixedly installed on the pulse jet manifold. Each of the multiple pipe joints has an air inlet port of a pulse valve fixedly installed at its top. Each of the multiple pulse valves has an air outlet port fixedly installed at one end of a ventilation pipe. The other ends of the ventilation pipes extend into the dust collector's top cover and are fixedly connected to one side of the top cover. Multiple exhaust pipes are provided inside the dust collector's top cover. Multiple back-blowing nozzles are fixedly installed at the bottom of each of the exhaust pipes. Secondary connecting pipes are slidably installed on each of the ventilation pipes. One end of a main connecting pipe is fixedly installed at the top of each of the exhaust pipes. The other ends of the main connecting pipes are connected to one end of each of the secondary connecting pipes via flanges. Sealing rings are fixedly installed on the inner walls of each of the secondary connecting pipes, and the inner walls of the sealing rings are in contact with the ventilation pipes. The dust collector's top cover is provided with a height adjustment mechanism to adjust the height of the back-blowing nozzles.

2. The pulse back-flushing dust removal device for a bag filter in a coal preparation plant crushing workshop according to claim 1, characterized in that, The height adjustment mechanism includes an adjustment screw, which is rotatably mounted on the top of the dust collector top cover. The bottom end of the adjustment screw extends into the dust collector top cover, and a retaining beam plate is threaded onto the adjustment screw. Multiple main connecting pipes are fixedly connected to the retaining beam plate.

3. The pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop according to claim 2, characterized in that, Two guide rods are fixedly installed on the inner top wall of the dust collector cover. Both guide rods pass through the collecting beam plate and are slidably connected to the collecting beam plate. A protrusion is fixedly installed on the top of the dust collector cover. A fixing screw is threaded on the protrusion. The end of the fixing screw abuts against the adjusting screw.

4. The pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop according to claim 1, characterized in that, A load-bearing baffle plate is fixedly installed on one side of the outer wall of the dust collector top cover. The pulse air manifold is fixedly connected to the load-bearing baffle plate. An exhaust pipe is fixedly installed on the outer wall of the dust collector top cover away from the pulse air manifold.

5. The pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop according to claim 1, characterized in that, Each of the multiple sealing rings has a compression ring groove at its bottom. Each of the multiple auxiliary connecting pipes has an electric push rod fixedly installed on its outer wall. Each of the multiple electric push rods has a connecting piece fixedly installed on its output shaft. Each of the multiple vent pipes passes through the multiple connecting pieces and slides in contact with the corresponding connecting pieces. Each of the multiple connecting pieces has a compression ring fixedly installed on its top. Each of the multiple compression rings is adapted to the multiple compression ring grooves. Each of the multiple vent pipes passes through the multiple compression rings without contacting the inner wall of the compression rings.

6. The pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop according to claim 1, characterized in that, Each of the aforementioned ventilation tubes is marked with graduation lines.

7. The pulse back-flushing cleaning device for a bag filter in a coal preparation plant crushing workshop according to claim 1, characterized in that, A sealing bolt is threaded onto the top of the dust collector top cover. The bottom end of the sealing bolt extends into the dust collector top cover and is rotatably fitted with a limiting baffle. One side of the limiting baffle contacts the inner wall of one side of the dust collector top cover, and the limiting baffle is located above the vent pipe.

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