A safe and explosion-proof high-voltage electrostatic dust collector

Abstract

The utility model discloses a safe and prevent explosion formula high pressure electrostatic dust collector, including the explosion -proof outer box, the top surface and the bottom surface symmetry of explosion -proof outer box are welded with the installation side strip, the inboard edge of explosion -proof outer box is horizontally provided with main dust remover, the top surface of main dust remover is evenly fixedly connected with the connecting end, prevents the explosion shock wave and flame to spread to the surrounding environment, has guaranteed the safety of equipment and personnel. Meanwhile, the heat dissipation outer frame and the symmetrical heat dissipation body that adjust motor outside even fixed welding can send away the heat that the motor operation produced in time, avoid the motor and cause the trouble or safety accident because of overheating, further improved the security of equipment. Realized firm connection and fixed, reduced the vibration and displacement of equipment operation, guaranteed the stability and reliability of equipment. Meanwhile, the layout of each component is reasonable, the connection is close, reduces the possibility of failure, reduces the maintenance cost of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of high-voltage electrostatic precipitators, specifically a safe and explosion-proof high-voltage electrostatic precipitator. Background Technology

[0002] A high-voltage electrostatic precipitator is a highly efficient air purification device that uses the principle of electrostatic adsorption to remove dust particles from industrial waste gas. It generates an electrostatic field by applying a high-voltage direct current between two electrodes, causing dust particles passing through this area to become charged and collected under the influence of the electric field.

[0003] The current high-voltage electrostatic precipitator is installed by directly connecting the machine body. However, this lack of structural strength can lead to an explosion of internal dust during use. This can cause the external casing to be unable to withstand the impact, resulting in dust flying into the surrounding area and endangering safety. Therefore, the installation and use are not safe. Utility Model Content

[0004] The purpose of this utility model is to provide a safe and explosion-proof high-voltage electrostatic precipitator to solve the problem mentioned in the background art. When installing and using current high-voltage electrostatic precipitators, the direct connection and installation of the machine body leads to insufficient rigidity during subsequent use, which may cause the internal dust to explode. This could cause the external casing to be unable to withstand the impact, resulting in the dust flying out and affecting the surrounding safety, making the installation and use unsafe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safe and explosion-proof high-voltage electrostatic precipitator, comprising an explosion-proof outer casing, with mounting side strips symmetrically welded to the top and bottom surfaces of the explosion-proof outer casing; a main dust collector horizontally arranged on the inner side of the explosion-proof outer casing; connecting ends uniformly and fixedly connected to the top surface of the main dust collector; connecting wires fixedly connected to the top ends of the connecting ends; a main high-voltage generator horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing; an adjusting rod symmetrically and fixedly arranged on the top surface of one of the explosion-proof outer casings; an exhaust pipe horizontally and fixedly connected to one end of the main dust collector; a connecting flange fixedly welded to one end of the exhaust pipe; and an adjusting motor fixedly arranged on one side of the explosion-proof outer casing. A heat dissipation frame is uniformly welded to the outer side of the regulating motor. A heat dissipation body is symmetrically fixed to the outer side of the heat dissipation frame. A discharge bottom box is uniformly fixed to the bottom surface of the explosion-proof outer box. A connecting bottom ring is horizontally welded to the bottom end of the discharge bottom box. A bottom through groove is uniformly opened on the bottom surface of the explosion-proof outer box. An air inlet pipe is fixedly connected to the end of the main dust collector away from the exhaust pipe. An inner limiting groove is horizontally opened on the inner side of the explosion-proof outer box. An extrusion inner plate is horizontally engaged on the inner side of the inner limiting groove. A buffer side plate is horizontally engaged on one side of the extrusion inner plate. A mating screw hole is opened on the side of the extrusion inner plate away from the buffer side plate. An adjusting screw is inserted into the side of the explosion-proof outer box.

[0006] Preferably, the explosion-proof outer casing is made of explosion-proof high-strength steel, and there are two explosion-proof outer casings. The two explosion-proof outer casings are set with the same specifications and dimensions. One side and both ends of the explosion-proof outer casing are open. The main dust collector is horizontally inserted into the inner side of the explosion-proof outer casing.

[0007] Preferably, there are multiple connection terminals, and the multiple connection terminals are evenly and fixedly arranged on the top surface of the main dust collector near both ends. The connection terminals are electrically connected to the internal high-voltage electrode structure of the main dust collector, and the top ends of the connection wires are electrically connected to the interior of the main high-voltage generator.

[0008] Preferably, the main high-pressure unit is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing near both ends. The adjusting rods are symmetrically and parallelly fixedly arranged on the top surface of the explosion-proof outer casing near both ends, and the top of the adjusting rods is fixedly connected to the bottom surface of the main high-pressure unit. The connecting flanges are all fixedly connected to one end of the exhaust pipe and the intake pipe.

[0009] Preferably, the regulating motor is fixedly installed at the center of the side of the explosion-proof outer casing, and the output end of the regulating motor is horizontally extended and fixedly connected to one end of the regulating screw. There are multiple discharge bottom boxes, and the multiple discharge bottom boxes are arranged horizontally in a straight line. The top of each discharge bottom box extends through the bottom groove and is fixedly connected to the bottom connection port of the main dust collector.

[0010] Preferably, the bottom through grooves are all opened through the bottom edge of the explosion-proof outer casing, the inner limiting groove is opened horizontally at the inner center of the explosion-proof outer casing, the side compression between the buffer side plates is set on the outer side of the main dust collector, and one end of the adjusting screw is horizontally extended and threadedly connected to the inner side of the mating screw hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This explosion-proof high-voltage electrostatic precipitator features an explosion-proof outer casing made of high-strength explosion-proof steel, effectively withstanding potential internal explosion pressure and preventing the spread of blast waves and flames to the surrounding environment, thus ensuring the safety of equipment and personnel. Simultaneously, the evenly welded heat dissipation frame and symmetrically arranged heat sinks effectively dissipate heat generated by the motor, preventing overheating-related malfunctions or accidents, further enhancing equipment safety. Stable connections and fixation reduce vibration and displacement during operation, ensuring equipment stability and reliability. Furthermore, the rational layout and tight connections of all components reduce the likelihood of malfunctions and lower maintenance costs. Dust is automatically discharged without complex operations or tools, improving work efficiency. Moreover, multiple discharge boxes arranged horizontally in a straight line ensure even dust discharge from different locations within the main dust collector, preventing dust accumulation and blockage. The fully explosion-proof high-voltage electrostatic precipitator can adjust the specifications and parameters of the main dust collector, as well as the installation method of the explosion-proof outer casing, according to different working environments and gas treatment requirements. It is suitable for dust control in various industrial fields, such as chemical, metallurgical, and building materials industries, and has wide applicability and promotion value. Attached Figure Description

[0012] Figure 1 This is a top view of the overall three-dimensional installation of this utility model; Figure 2 This is a bottom view of the three-dimensional installation of this utility model; Figure 3 This is a perspective view of the explosion-proof outer casing of this utility model; Figure 4 This is a three-dimensional structural diagram of the extruded inner plate of this utility model; Figure 5 This is a three-dimensional structural diagram of the inner limiting groove of this utility model.

[0013] In the diagram: 1. Explosion-proof outer casing; 2. Mounting side strip; 3. Main dust collector; 4. Connecting end; 5. Connecting line; 6. Main high voltage converter; 7. Adjusting upright; 8. Exhaust pipe body; 9. Connecting flange; 10. Adjusting motor; 11. Heat dissipation frame; 12. Heat dissipation body; 13. Discharge bottom box; 14. Connecting bottom ring; 15. Bottom through groove; 16. Air inlet pipe body; 17. Inner limit groove; 18. Extrusion inner plate; 19. Buffer side plate; 20. Mating screw hole; 21. Adjusting screw. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1: like Figure 1-5 As shown, this utility model provides a technical solution: a safe explosion-proof high-voltage electrostatic precipitator, including an explosion-proof outer casing 1. The top and bottom surfaces of the explosion-proof outer casing 1 are symmetrically welded with mounting side strips 2. A main dust collector 3 is horizontally arranged on the inner side of the explosion-proof outer casing 1. The explosion-proof outer casing 1 is made of explosion-proof high-strength steel, and there are two explosion-proof outer casings 1 with identical dimensions. One side and both ends of the explosion-proof outer casing 1 are open. The main dust collector 3 is horizontally inserted into the inner side of the explosion-proof outer casing 1. Connecting ends 4 are uniformly fixedly connected to the top surface of the main dust collector 3, and connecting wires 5 are fixedly connected to the top of the connecting ends 4. A main high-voltage generator 6 is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing 1. Multiple connecting ends 4 are uniformly fixedly arranged on the top surface of the main dust collector 3 near both ends. The connection end 4 is electrically connected to the internal high-voltage electrode structure of the main dust collector 3. The top end of the connecting wire 5 is electrically connected to the inside of the main high-voltage generator 6. An adjusting rod 7 is symmetrically fixed on the top surface of an explosion-proof outer casing 1. An exhaust pipe body 8 is horizontally fixedly connected to one end of the main dust collector 3. A connecting flange 9 is fixedly welded to one end of the exhaust pipe body 8. The main high-voltage generator 6 is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing 1 near both ends. The adjusting rods 7 are symmetrically and parallelly fixedly arranged on the top surface of the explosion-proof outer casing 1 near both ends. The top end of the adjusting rod 7 is fixedly connected to the bottom surface of the main high-voltage generator 6. The connecting flange 9 is fixedly connected to one end of the exhaust pipe body 8 and the inlet pipe body 16. An adjusting motor 10 is fixedly arranged on one side of the explosion-proof outer casing 1. A heat dissipation frame 11 is uniformly fixedly welded to the outer side of the adjusting motor 10.

[0016] By using a high-voltage electrostatic field to adsorb dust particles in the gas, dust collector 3 can efficiently remove fine dust particles from the gas, achieving high dust removal efficiency and enabling the emitted gas to reach a high cleanliness standard, thus reducing environmental pollution.

[0017] Example 2: like Figure 1-5 As shown, this utility model provides a technical solution: a safe explosion-proof high-voltage electrostatic precipitator, including an explosion-proof outer casing 1. The top and bottom surfaces of the explosion-proof outer casing 1 are symmetrically welded with mounting side strips 2. A main dust collector 3 is horizontally arranged on the inner side of the explosion-proof outer casing 1. The explosion-proof outer casing 1 is made of explosion-proof high-strength steel, and there are two explosion-proof outer casings 1. The two explosion-proof outer casings 1 have the same specifications and dimensions. One side and both ends of the explosion-proof outer casing 1 are open. The main dust collector 3 is horizontally inserted into the inner side of the explosion-proof outer casing 1. Connecting ends 4 are evenly fixedly connected to the top surface of the main dust collector 3. A connecting wire 5 is fixedly connected to the top of the head 4. A main high-voltage generator 6 is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing 1. Multiple connecting ends 4 are evenly and fixedly arranged on the top surface of the main dust collector 3 near both ends. The connecting ends 4 are electrically connected to the internal high-voltage electrode structure of the main dust collector 3. The top ends of the connecting wires 5 are all electrically connected to the interior of the main high-voltage generator 6. An adjusting rod 7 is symmetrically and fixedly arranged on the top surface of one explosion-proof outer casing 1. An exhaust pipe 8 is horizontally and fixedly connected to one end of the main dust collector 3. A connecting flange 9 is fixedly welded to one end of the exhaust pipe 8. The main high-voltage generator 6 is horizontally and symmetrically arranged. Adjusting rods 7 are symmetrically and parallelly fixedly installed on the top surface of the explosion-proof outer casing 1 near both ends. The top of the adjusting rods 7 is fixedly connected to the bottom surface of the main high-pressure unit 6. Connecting flanges 9 are fixedly connected to one end of the exhaust pipe body 8 and the intake pipe body 16. An adjusting motor 10 is fixedly installed on one side of the explosion-proof outer casing 1. A heat dissipation frame 11 is uniformly welded to the outer side of the adjusting motor 10. A heat dissipation body 12 is symmetrically fixed to the outer side of the heat dissipation frame 11. A discharge bottom box 13 is uniformly fixed to the bottom surface of the explosion-proof outer casing 1. A connecting bottom ring 14 is horizontally welded to the bottom end of the material bottom box 13. Bottom through grooves 15 are evenly opened on the bottom surface of the explosion-proof outer box 1. The adjusting motor 10 is fixedly installed at the center of the side of the explosion-proof outer box 1, and the output end of the adjusting motor 10 is horizontally extended and fixedly connected to one end of the adjusting screw 21. There are multiple material discharge bottom boxes 13, and the multiple material discharge bottom boxes 13 are arranged horizontally in a straight line. The top of each material discharge bottom box 13 extends through the bottom through groove 15 and is fixedly connected to the bottom connection port of the main dust collector 3. The main dust collector 3 is fixedly connected to the air inlet pipe 16 at the end away from the exhaust pipe 8.

[0018] The explosion-proof outer casing 1 and the main dust collector 3 are connected and fixed by components such as the inner limiting groove 17, the extrusion inner plate 18 and the buffer side plate 19, which reduces the vibration and displacement of the equipment during operation and ensures the stability and reliability of the equipment.

[0019] Example 3: like Figure 1-5As shown, this utility model provides a technical solution: a safe explosion-proof high-voltage electrostatic precipitator, including an explosion-proof outer casing 1. The top and bottom surfaces of the explosion-proof outer casing 1 are symmetrically welded with mounting side strips 2. A main dust collector 3 is horizontally arranged on the inner side of the explosion-proof outer casing 1. The explosion-proof outer casing 1 is made of explosion-proof high-strength steel, and there are two explosion-proof outer casings 1 with identical dimensions. One side and both ends of the explosion-proof outer casing 1 are open. The main dust collector 3 is horizontally inserted into the inner side of the explosion-proof outer casing 1. Connecting ends 4 are uniformly fixedly connected to the top surface of the main dust collector 3, and connecting wires 5 are fixedly connected to the top of the connecting ends 4. A main high-voltage generator 6 is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing 1. There are multiple connecting ends 4, which are evenly and fixedly installed on the top surface of the main dust collector 3 near both ends. The connecting ends 4 are electrically connected to the internal high-voltage electrode structure of the main dust collector 3. The top ends of the connecting wires 5 are all electrically connected to the interior of the main high-voltage generator 6. An adjusting rod 7 is symmetrically and fixedly installed on the top surface of an explosion-proof outer casing 1. An exhaust pipe body 8 is horizontally and fixedly connected to one end of the main dust collector 3. A connecting flange 9 is fixedly welded to one end of the exhaust pipe body 8. The main high-voltage generator 6 is horizontally and symmetrically installed on the top surface of the explosion-proof outer casing 1 near both ends. The adjusting rods 7 are symmetrically and parallel to each other and fixedly installed on the top surface of the explosion-proof outer casing 1 near both ends. The top ends of the adjusting rods 7 are fixedly connected to the bottom surface of the main high-voltage generator 6. The connecting flanges 9 are all... A fixed connection is provided at one end of the exhaust pipe body 8 and the intake pipe body 16. An adjusting motor 10 is fixedly installed on one side of the explosion-proof outer casing 1. A heat dissipation frame 11 is uniformly welded to the outer side of the adjusting motor 10. A heat dissipation body 12 is symmetrically fixed to the outer side of the heat dissipation frame 11. A discharge bottom box 13 is uniformly fixedly installed on the bottom surface of the explosion-proof outer casing 1. A connecting bottom ring 14 is horizontally welded to the bottom end of the discharge bottom box 13. Bottom through grooves 15 are uniformly opened on the bottom surface of the explosion-proof outer casing 1. The adjusting motor 10 is fixedly installed at the center of the side of the explosion-proof outer casing 1, and the output end of the adjusting motor 10 is horizontally extended and fixedly connected to one end of the adjusting screw 21. There are multiple discharge bottom boxes 13, and the multiple discharge bottom boxes 13 are arranged in a straight line with each other. The discharge box 13 is arranged horizontally, with its top end extending through the bottom groove 15 and fixedly connected to the bottom connection port of the main dust collector 3. The main dust collector 3 has an inlet pipe 16 fixedly connected to its end away from the exhaust pipe 8. An inner limiting groove 17 is horizontally opened on the inner side of the explosion-proof outer casing 1. An inner pressing plate 18 is horizontally engaged on the inner side of the inner limiting groove 17. A buffer side plate 19 is horizontally engaged on one side of the inner pressing plate 18. A mating screw hole 20 is opened on the side of the inner pressing plate 18 away from the buffer side plate 19. The bottom grooves 15 are all through-holes at the bottom edge of the explosion-proof outer casing 1. The inner limiting grooves 17 are horizontally opened at the inner center of the explosion-proof outer casing 1. The buffer side plates 19 are laterally pressed together on the outer side of the main dust collector 3.One end of the adjusting screw 21 is horizontally extended and threaded, located on the inner side of the mating screw hole 20. The adjusting screw 21 is inserted into the side of the explosion-proof outer casing 1.

[0020] By adjusting the motor 10 and adjusting screw 21, the position and state of the main dust collector 3 can be precisely adjusted.

[0021] Working principle: The explosion-proof outer casing 1 is securely installed on the bracket or other supporting structure using bolts and other connectors to ensure a firm and reliable installation, providing a stable foundation for the operation of subsequent equipment. The main dust collector 3 is then horizontally inserted into the inner side of the explosion-proof outer casing 1. At this time, the inner limiting groove 17, which is horizontally opened on the inner side of the explosion-proof outer casing 1, serves as a guide and initial positioning. Next, the adjusting motor 10 is started. The adjusting motor 10 is fixed at the center of the side of the explosion-proof outer casing 1, and its output end extends horizontally and is fixedly connected to the adjusting screw 21. One end of the adjusting screw 21 is threaded into the mating screw hole 20 opened on one side of the extrusion inner plate 18. As the adjusting motor 10 rotates, the adjusting screw 21 drives the extrusion inner plate 18 to move horizontally within the inner limiting groove 17. A buffer side plate 19 is snapped onto one side of the inner extrusion plate 18. The buffer side plate 19 gradually presses against the outer edge of the main dust collector 3, firmly fixing the main dust collector 3 inside the explosion-proof outer casing 1. At the same time, the buffer side plate 19 also serves as a buffer protection function. The inlet pipe 16 is used to introduce dust-containing gas into the main dust collector 3, while the exhaust pipe 8 is used to discharge the clean gas after dust removal. During connection, the connecting flange 9, which is fixedly welded to one end of the exhaust pipe 8 and the inlet pipe 16, is used to firmly connect them to the external inlet and exhaust pipes with bolts, ensuring a good seal at the connection to prevent gas leakage. The top of the connecting end 4 is fixedly connected to the connecting wire 5, and the top of the connecting wire 5 is electrically connected to the main high voltage generator 6, which is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing 1, to provide the main dust collector 3 with the required high voltage power supply. This allows the main dust collector 3 to work normally and generate an electrostatic field, adsorbing dust particles in the gas. Under the action of the high voltage electrostatic field, the dust particles in the gas are adsorbed onto the electrodes, thereby achieving gas purification. The purified gas is discharged through the exhaust pipe 8. During operation, the adjusting motor 10 can adjust the position or state of the main dust collector 3 as needed to optimize the dust removal effect. Multiple discharge bottom boxes 13 extend through the bottom through-slot 15 and are fixedly connected to the bottom connection port of the main dust collector 3. By opening the valve at the horizontally welded connecting bottom ring 14 at the bottom of the discharge bottom box 13, dust can be discharged through the discharge bottom box 13.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safe explosion-proof high-voltage electrostatic precipitator, comprising an explosion-proof outer casing (1), characterized in that: The explosion-proof outer casing (1) has mounting side strips (2) symmetrically welded on its top and bottom surfaces. A main dust collector (3) is horizontally arranged on the inner side of the explosion-proof outer casing (1). A connecting end (4) is uniformly fixedly connected to the top surface of the main dust collector (3). A connecting wire (5) is fixedly connected to the top of the connecting end (4). A main high voltage generator (6) is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing (1). An adjusting rod (7) is symmetrically fixedly arranged on the top surface of one of the explosion-proof outer casings (1). An exhaust pipe (8) is horizontally fixedly connected to one end of the main dust collector (3). A connecting flange (9) is fixedly welded to one end of the exhaust pipe (8). An adjusting motor (10) is fixedly arranged on one side of the explosion-proof outer casing (1). A heat dissipation frame (11) is uniformly fixedly welded to the outer side of the adjusting motor (10). The outer side of the explosion-proof outer box (1) is symmetrically fixed with a heat dissipation body (12). The bottom surface of the explosion-proof outer box (1) is uniformly fixed with a discharge bottom box (13). The bottom end of the discharge bottom box (13) is horizontally welded with a connecting bottom ring (14). The bottom surface of the explosion-proof outer box (1) is uniformly opened with a bottom through groove (15). The main dust collector (3) is fixedly connected with an air inlet pipe (16) at the end away from the exhaust pipe (8). The inner side of the explosion-proof outer box (1) is horizontally opened with an inner limiting groove (17). The inner side of the inner limiting groove (17) is horizontally snapped with an extrusion inner plate (18). One side of the extrusion inner plate (18) is horizontally snapped with a buffer side plate (19). The extrusion inner plate (18) is opened with a mating screw hole (20) on the side away from the buffer side plate (19). The side of the explosion-proof outer box (1) is inserted with an adjusting screw (21).

2. The explosion-proof high-voltage electrostatic precipitator according to claim 1, characterized in that: The explosion-proof outer casing (1) is made of explosion-proof high-strength steel material, and there are two explosion-proof outer casings (1). The two explosion-proof outer casings (1) are set with the same specifications and dimensions. One side and both ends of the explosion-proof outer casing (1) are open. The main dust collector (3) is horizontally inserted into the inner side of the explosion-proof outer casing (1).

3. The explosion-proof high-voltage electrostatic precipitator according to claim 1, characterized in that: The number of connection ends (4) is multiple, and the multiple connection ends (4) are evenly fixed on the top surface of the main dust collector (3) near both ends. The connection ends (4) are electrically connected to the internal high-voltage electrode structure of the main dust collector (3), and the top of the connection line (5) is electrically connected to the interior of the main high voltage generator (6).

4. The explosion-proof high-voltage electrostatic precipitator according to claim 1, characterized in that: The main high-pressure unit (6) is horizontally and symmetrically arranged on the top surface of the explosion-proof outer casing (1) near both ends. The adjusting rods (7) are symmetrically and parallelly fixedly arranged on the top surface of the explosion-proof outer casing (1) near both ends. The top of the adjusting rods (7) is fixedly connected to the bottom surface of the main high-pressure unit (6). The connecting flanges (9) are fixedly connected to one end of the exhaust pipe body (8) and the intake pipe body (16).

5. The explosion-proof high-voltage electrostatic precipitator according to claim 1, characterized in that: The regulating motor (10) is fixedly installed at the center of the side of the explosion-proof outer casing (1), and the output end of the regulating motor (10) is horizontally extended and fixedly connected to one end of the regulating screw (21). There are multiple discharge bottom boxes (13), and the multiple discharge bottom boxes (13) are arranged horizontally in a straight line. The top of each discharge bottom box (13) extends through the bottom through groove (15) and is fixedly connected to the bottom connection port of the main dust collector (3).

6. The explosion-proof high-voltage electrostatic precipitator according to claim 1, characterized in that: The bottom through grooves (15) are all opened through the bottom edge of the explosion-proof outer box (1), the inner limiting groove (17) is opened horizontally at the inner center of the explosion-proof outer box (1), the side compression between the buffer side plates (19) is set on the outer side of the main dust collector (3), and one end of the adjusting screw (21) is horizontally extended and threaded to the inner side of the mating screw hole (20).

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