An exhaust gas purification unit for air jet loom

Abstract

The present invention discloses an exhaust gas purification unit for an air-jet loom in the field of exhaust gas treatment technology, comprising a box body, wherein a first filter mechanism and a second filter mechanism are provided in the box body; a first cleaning mechanism is provided on the first filter mechanism and a second cleaning mechanism is provided on the second filter mechanism; a driving mechanism is provided on the box body; the first filter mechanism is used to filter out fluff in the exhaust gas; the second filter mechanism is used to filter out small dust particles in the exhaust gas after passing through the first filter mechanism; the first cleaning mechanism is used to clean the fluff stuck on the first filter mechanism; the second cleaning mechanism is used to clean the small dust particles attached to the second filter mechanism; the driving mechanism is used to drive the first cleaning mechanism and the second cleaning mechanism to operate; this device can automatically clean the filtered fluff and dust, and can effectively promote the efficiency of exhaust gas treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, in particular to a waste gas purification unit for an air jet loom. Background Art

[0002] An air jet loom is a shuttleless loom that uses a jet of air to pull the weft yarn through the shed. Exhaust gas is generated when the air jet loom is working. The existing method for treating solid matter in the exhaust gas is usually to filter it with a filter.

[0003] In addition to dust and other small solid particles, the exhaust gas from the loom also contains a large amount of fluff. Because the fluff is usually soft and silky, it is relatively fluffy when piled up and covers a large area. Combined with the dust, it can completely block the filter in a short time. At the same time, the fluff will get stuck in the mesh of the filter, making it difficult to clean. Summary of the Invention

[0004] The object of the present invention is to provide an exhaust gas purification unit for an air jet loom to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an exhaust gas purification unit for an air jet loom, comprising a box body, wherein a first filter mechanism and a second filter mechanism are provided in the box body;

[0006] The first filter mechanism is provided with a first cleaning mechanism and the second filter mechanism is provided with a second cleaning mechanism; the box body is provided with a driving mechanism;

[0007] The first filtering mechanism is used to filter out fluff in the exhaust gas;

[0008] The second filtering mechanism is used to filter out small dust particles in the exhaust gas after passing through the first filtering mechanism;

[0009] The first cleaning mechanism is used to clean the fluff stuck on the first filtering mechanism;

[0010] The second cleaning mechanism is used to clean small dust particles attached to the second filtering mechanism;

[0011] The driving mechanism is used to drive the first cleaning mechanism and the second cleaning mechanism to operate.

[0012] Preferably, the first filtering mechanism includes two fixed frames, which are distributed in the box body and are fixedly connected to the box body; a plurality of filter rods are provided in the fixed frame, and the width of the filter rods and the distance between two adjacent filter rods are 0.1 to 0.2 cm; and the plurality of filter rods are fixedly connected to the fixed frame.

[0013] Preferably, the fixed frames and filter rods on the front and rear sides are distributed vertically and the fixed frame and filter rods on the rear side are distributed horizontally; the filter rods are wavy and bend back and forth; the bottom part of the front filter rod and the right part of the rear filter rod are both right-angled and extend backward.

[0014] and a lifting mechanism is installed in this sliding part, and its first end is connected with this this second end to the slip rail, and its second end is connected with this this second end to the slip rail.

[0015] Preferably, the middle portion of the front end of the limiting rod is in the shape of a pointed angle protruding forward, and the width of the limiting rod is greater than the diameter of the reciprocating screw rod.

[0016] The two wheels are fixedly secured to the two guide rails, each of which is secured to the first and second guide rails, and the other end of which is secured to the second guide rail by a spring.

[0017] Preferably, the second filter mechanism includes a filter plate, which is slidably engaged with the inner wall of the box and the four corners of the front end of the filter plate are fixedly connected to sliding rods, which pass through the two fixed frames and are slidably connected to the two fixed frames.

[0018] Preferably, the second cleaning mechanism includes two third sliding frames, which are symmetrically distributed on the left and right sides of the filter plate and are both slidably connected to the filter plate; a plurality of brushes are fixedly connected to the third sliding frame, and the plurality of brushes are all in contact with the front surface of the filter plate; a connecting rod is rotatably connected to the third sliding frame, and the other ends of the connecting rods on the left and right sides are respectively rotatably connected to the left and right side parts of the box body.

[0019] Preferably, the driving mechanism includes a motor, which is located at the right side of the box and is fixedly connected to the box; the motor output shaft is fixedly connected to the rear reciprocating screw; the left end of the rear reciprocating screw is fixedly connected to the first bevel gear, and the upper position of the first bevel gear is meshed with the second bevel gear, the upper end of the second bevel gear is fixedly connected to the first pulley, and the second bevel gear and the first pulley are both rotatably connected to the box; the upper end of the front reciprocating screw is fixedly connected to the second pulley, and the second pulley is meshed with a belt and the belt is simultaneously meshed with the first pulley; driving rods are provided at both ends of the second sliding frame, and the second sliding frame is slidably connected to the driving rods located at both ends thereof; the four sliding rods are fixedly connected to the driving rods on the front and rear sides.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention allows the exhaust gas to pass into the box body, and the exhaust gas will pass through the first filter mechanism and the second filter mechanism in sequence; when the exhaust gas passes through the first filter mechanism, the fluff mixed inside the exhaust gas will be filtered out by the first filter mechanism, and the fluff will be stuck on the surface of the first filter mechanism; when the exhaust gas passes through the second filter mechanism, the dust mixed inside the exhaust gas will be filtered out by the second filter mechanism, and the filtered dust will adhere to the surface of the second filter mechanism; by starting the driving mechanism to drive the first cleaning mechanism and the second cleaning mechanism to operate, the first cleaning mechanism will continuously clean the fluff stuck on the first cleaning mechanism, and the second cleaning mechanism will continuously clean the dust attached to the second filter mechanism; under the action of the first cleaning mechanism and the second cleaning mechanism, it can be ensured that the first cleaning mechanism and the second cleaning mechanism will not be blocked, and can continuously treat the exhaust gas generated by the loom.

[0022] 2. The present invention has a wave-shaped filter rod that bends forward and backward, so that the intercepted fluff can be concentrated on the backward-bent portion of the filter rod, thereby effectively preventing the box from being blocked in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2It is a rear view structural schematic diagram of the present invention;

[0025] Figure 3 It is a schematic cross-sectional view of the present invention;

[0026] Figure 4 It is a schematic diagram of the split structure of the present invention;

[0027] Figure 5 Schematic diagram of the structure of the filter rod in the present invention;

[0028] Figure 6 This is a schematic structural diagram of the filter rod from a second viewing angle of the present invention;

[0029] Figure 7 Schematic diagram of the structure of the first cleaning mechanism in the present invention;

[0030] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of A;

[0031] Figure 9 It is a structural schematic diagram of the second cleaning mechanism in the present invention.

[0032] In the accompanying drawings: 1. Box body; 2. Fixed frame; 3. Filter rod; 4. Reciprocating screw; 5. First sliding frame; 6. Limit rod; 7. Second sliding frame; 8. Cleaning rod; 9. First spring; 10. Fixed rod; 11. Block; 12. Sliding block; 13. Second spring; 14. First push block; 15. Rotating rod; 16. Second push block; 17. Filter plate; 18. Sliding rod; 19. Third sliding frame; 20. Brush; 21. Connecting rod; 22. Motor; 23. First bevel gear; 24. Second bevel gear; 25. First pulley; 26. Second pulley; 27. Belt; 28. Drive rod. DETAILED DESCRIPTION

[0033] See also Figures 1-9 , the present invention provides a technical solution: an exhaust gas purification unit for an air jet loom, comprising a box body 1, wherein a first filter mechanism and a second filter mechanism are provided in the box body 1;

[0034] The first filter mechanism is provided with a first cleaning mechanism and the second filter mechanism is provided with a second cleaning mechanism; the box body 1 is provided with a driving mechanism;

[0035] The first filter mechanism is used to filter out fluff in the exhaust gas;

[0036] The second filter mechanism is used to filter out small dust particles in the exhaust gas after passing through the first filter mechanism;

[0037] The first cleaning mechanism is used to clean the fluff stuck on the first filtering mechanism;

[0038] The second cleaning mechanism is used to clean small dust particles attached to the second filtering mechanism;

[0039] The driving mechanism is used to drive the first cleaning mechanism and the second cleaning mechanism to operate;

[0040] During operation, since the exhaust gas from the loom contains a large amount of fluff and dust, when the exhaust gas is passed into the box 1, the exhaust gas will pass through the first filter mechanism and the second filter mechanism in sequence; when the exhaust gas passes through the first filter mechanism, the fluff mixed inside it will be filtered out by the first filter mechanism, and the fluff will be stuck on the surface of the first filter mechanism; when the exhaust gas passes through the second filter mechanism, the dust mixed inside it will be filtered out by the second filter mechanism, and the filtered dust will adhere to the surface of the second filter mechanism; by starting the driving mechanism to drive the first cleaning mechanism and the second cleaning mechanism to operate, the first cleaning mechanism will continuously clean the fluff stuck on the first cleaning mechanism, and the second cleaning mechanism will continuously clean the dust attached to the second filter mechanism; under the action of the first cleaning mechanism and the second cleaning mechanism, it can be ensured that the first cleaning mechanism and the second cleaning mechanism will not be blocked, and can continuously treat the exhaust gas generated by the loom.

[0041] like Figure 5-6 As shown, as a further embodiment of the present invention, the first filter mechanism includes two fixed frames 2, which are distributed in the box body 1 and are fixedly connected to the box body 1; a plurality of filter rods 3 are provided in the fixed frame 2, and the width of the filter rods 3 and the distance between two adjacent filter rods 3 are 0.1 to 0.2 cm; and the plurality of filter rods 3 are fixedly connected to the fixed frame 2;

[0042] The front and rear fixing frames 2 and the filter rods 3 are arranged vertically, and the rear fixing frame 2 and the filter rods 3 are arranged horizontally; the filter rods 3 are wavy and bend back and forth; the bottom part of the front filter rod 3 and the right part of the rear filter rod 3 are both right-angled and extend backward;

[0043] During operation, when the exhaust gas passes through the front and rear fixed frames 2, since the fluff in the exhaust gas is mostly filamentous, the fluff in the horizontal state will be blocked by the multiple filter rods 3 distributed vertically on the front side, while the fluff in the vertical state may pass through the gaps in the vertical filter rods 3 and cross the fixed frame 2 on the front side. At this time, the fluff passing through can be blocked by the multiple filter rods 3 distributed horizontally on the rear side; since the fluff is relatively fine and soft, it will be stuck on the filter rods 3 and in the gaps between two adjacent filter rods 3 after being blocked by the filter rods 3. At the same time, the fluff is relatively fluffy and can block the gaps in the filter rods 3 in a short time; because the filter rods 3 are wavy in shape with the front and back bending, the blocked fluff can be concentrated on the backward bending part of the filter rods 3, thereby effectively avoiding the blockage of the box 1 in a short time; when in use, multiple filter rods 3 can be set according to the amount of exhaust gas.

[0044] like Figure 3 、 Figure 7-8 As shown, as a further solution of the present invention, the first cleaning mechanism includes two reciprocating screw rods 4, which are respectively distributed in front of the front and rear fixed frames 2 and the reciprocating screw rods 4 on the front and rear sides are relatively parallel to the filter rods 3 on the front and rear sides; the reciprocating screw rods 4 are rotatably connected to the box body 1 and a first sliding frame 5 is threadedly connected to the reciprocating screw rods 4, a limiting rod 6 is provided in front of the first sliding frame 5, the limiting rod 6 is fixedly connected to the box body 1 and the first sliding frame 5 is slidably connected to the limiting rod 6; a second sliding frame 7 is slidably connected to the first sliding frame 5, A plurality of cleaning rods 8 are fixedly connected to the second sliding frame 7, and the plurality of cleaning rods 8 are respectively located in the gaps between all two adjacent filter rods 3, and the cleaning rods 8 and the two adjacent filter rods 3 are in contact with each other; two first springs 9 are fixedly connected to the second sliding frame 7, and the other ends of the two first springs 9 are fixedly connected to the first sliding frame 5; a separation mechanism is provided on the second sliding frame 7, which is used to drive the cleaning rods 8 to separate from the filter rods 3 when the cleaning rods 8 move to the end position of the filter rods 3 and automatically reset when the cleaning rods 8 move to the initial end position of the filter rods 3;

[0045] The middle part of the front end of the limiting rod 6 is in the shape of a sharp angle protruding forward and the width of the limiting rod 6 is greater than the diameter of the reciprocating screw rod 4;

[0046] The separation mechanism includes two fixed rods 10, which are distributed on both sides of the reciprocating screw rod 4 and are fixedly connected to the first sliding frame 5; the fixed rod 10 is slidably connected to the second sliding frame 7 and a block 11 is slidably connected to the front position of the fixed rod 10, the block 11 is engaged with the second sliding frame 7 and the other end of the block 11 is fixedly connected to a sliding block 12, and a second spring 13 is fixedly connected to the sliding block 12, and the other end of the second spring 13 is fixedly connected to the fixed rod 10; the sliding block 12 is slidably connected to the fixed rod 10, and the front sliding block 12 is engaged with the second sliding frame 7. A first push block 14 is fixedly connected to the upper position and the left side of the rear sliding block 12, and the first push block 14 is fixedly connected to the box body 1; a rotating rod 15 is symmetrically connected to the second sliding frame 7 at positions on both sides of the reciprocating screw rod 4, and a torsion spring is provided at the connection between the rotating rod 15 and the second sliding frame 7; the front rotating rod 15 is tilted with the upper end at the front and the lower end at the rear; the rear rotating rod 15 is tilted with the left end at the front and the rear end at the rear; a second push block 16 is provided below the front rotating rod 15 and to the right side of the rear rotating rod 15, and the second push block 16 is fixedly connected to the box body 1;

[0047] When the first sliding frame 5 drives the second sliding frame 7 to move to the bottom position of the filter rod 3, the cleaning rod 8 will be pushed down. When the first sliding frame 5 and the second sliding frame 7 move to the uppermost position, the sliding block 12 is squeezed downward by the first pushing block 14, and the sliding block 12 drives the blocking block 11 to move downward, and the blocking block 11 moves downward and is separated from the second sliding frame 7 when it moves downward. At this time, the second sliding frame 7 automatically resets under the action of the first spring 9, and the cleaning rod 8 is inserted into the gap at the upper end position of the filter rod 3 again.

[0048] like Figure 2-3 As shown, as a further solution of the present invention, the second filtering mechanism includes a filter plate 17, the filter plate 17 is slidably matched with the inner wall of the box body 1, and the four corners of the front end of the filter plate 17 are fixedly connected to the sliding rod 18, and the sliding rod 18 passes through the two fixed frames 2 and is slidably connected to the two fixed frames 2;

[0049] During operation, dust and other small solid particles in the exhaust gas from the loom can be filtered out through the filter plate 17 , and the filtered dust and other small solid particles will adhere to the filter plate 17 .

[0050] like Figure 9As shown, as a further solution of the present invention, the second cleaning mechanism includes two third sliding frames 19, which are symmetrically distributed on the left and right sides of the filter plate 17 and are both slidably connected to the filter plate 17; a plurality of brushes 20 are fixedly connected to the third sliding frame 19, and the plurality of brushes 20 are all in contact with the front surface of the filter plate 17; a connecting rod 21 is rotatably connected to the third sliding frame 19, and the other ends of the connecting rods 21 on the left and right sides are respectively rotatably connected to the left and right side parts of the box body 1;

[0051] During operation, by driving the filter plate 17 to slide back and forth, the filter plate 17 will push the two third sliding frames 19 to move back and forth; under the action of the connecting rod 21, the third sliding frame 19 will be pushed by the connecting rod 21 in the direction of approaching the other third sliding frame 19 when moving forward, and will be pulled by the connecting rod 21 in the direction of away from the other third sliding frame 19 when moving backward; when the third sliding frame 19 continuously moves back and forth on the surface of the filter plate 17, it will drive multiple brushes 20 to move back and forth on the filter plate 17, and when the multiple brushes 20 continuously move back and forth, they will continuously clean the dust attached to the filter plate 17.

[0052] like Figure 1-2 、 Figure 5 As shown, as a further solution of the present invention, the driving mechanism includes a motor 22, the motor 22 is located at the right side of the box body 1 and the motor 22 is fixedly connected to the box body 1; the output shaft of the motor 22 is fixedly connected to the rear reciprocating screw rod 4; the left end of the rear reciprocating screw rod 4 is fixedly connected to the first bevel gear 23, and the upper side position of the first bevel gear 23 is meshed with the second bevel gear 24, the upper end of the second bevel gear 24 is fixedly connected to the first pulley 25, and the second bevel gear 24 and the first pulley 25 are both rotatably connected to the box body 1; the upper end of the front reciprocating screw rod 4 is fixedly connected to the second pulley 26, and the second pulley 26 is meshed with a belt 27, and the belt 27 is simultaneously meshed with the first pulley 25; driving rods 28 are provided at both ends of the second sliding frame 7, and the second sliding frame 7 is simultaneously slidably connected to the driving rods 28 located at both ends thereof; the four sliding rods 18 are fixedly connected to the driving rods 28 on the front and rear sides;

[0053] During operation, the reciprocating screw rod 4 on the rear side is driven to rotate by starting the motor 22, and the reciprocating screw rod 4 on the rear side drives the first bevel gear 23 to rotate. The first bevel gear 23 drives the first pulley 25 to rotate through the second bevel gear 24, and the first pulley 25 drives the second pulley 26 to rotate through the belt 27, and the second pulley 26 drives the reciprocating screw rod 4 on the front side to rotate, thereby achieving the effect of synchronous rotation of the reciprocating screw rods 4 on the front and rear sides; because the filter rod 3 is a wave-shaped filter rod 3 curved back and forth, the third sliding frame 19 will be attached to the surface of the filter rod 3 under the action of the first spring 9, so the third sliding frame 19 will continue to move back and forth when it moves, and when the third sliding frame 19 moves back and forth, it will drive the driving rods 28 at both ends thereof to move back and forth; the driving rods 28 on the front and rear sides will drive the filter plate 17 to move back and forth through the four sliding rods 18.

Claims

1. An exhaust gas purification unit for an air jet loom, comprising a housing (1), characterized in that: A first filtering mechanism and a second filtering mechanism are provided in the box (1); a first cleaning mechanism is provided on the first filtering mechanism and a second cleaning mechanism is provided on the second filtering mechanism; a driving mechanism is provided on the box; The first filtering mechanism is used to filter out fluff in the exhaust gas; The second filtering mechanism is used to filter out small dust particles in the exhaust gas after passing through the first filtering mechanism; The first cleaning mechanism is used to clean the fluff stuck on the first filtering mechanism; The second cleaning mechanism is used to clean small dust particles attached to the second filtering mechanism; The driving mechanism is used to drive the first cleaning mechanism and the second cleaning mechanism to operate; The first filtering mechanism comprises two fixed frames (2), the two fixed frames (2) are distributed in the box body (1) and both fixed frames (2) are fixedly connected to the box body (1); a plurality of filter rods (3) are provided in the fixed frames (2), the width of the filter rods (3) and the distance between two adjacent filter rods (3) are 0.1 to 0.2 centimeters; the plurality of filter rods (3) are fixedly connected to the fixed frames (2); The first cleaning mechanism comprises two reciprocating screw rods (4), the two reciprocating screw rods (4) are respectively distributed in front of the front and rear fixed frames (2), and the reciprocating screw rods (4) on the front and rear sides are respectively parallel to the filter rods (3) on the front and rear sides; the reciprocating screw rods (4) are rotatably connected to the box body (1), and a first sliding frame (5) is threadedly connected to the reciprocating screw rods (4); a limiting rod (6) is provided in front of the first sliding frame (5), the limiting rod (6) is fixedly connected to the box body (1), and the first sliding frame (5) is slidably connected to the limiting rod (6); a second sliding frame (7) is slidably connected to the first sliding frame (5), and the second sliding frame (7) is slidably connected to the second sliding frame (7) ) is fixedly connected to a plurality of cleaning rods (8), the plurality of cleaning rods (8) are respectively located in the gaps between all two adjacent filter rods (3), and the cleaning rods (8) and the two adjacent filter rods (3) are in contact with each other; the second sliding frame (7) is fixedly connected to two first springs (9), the other ends of the two first springs (9) are fixedly connected to the first sliding frame (5); the second sliding frame (7) is provided with a separation mechanism, the separation mechanism is used to drive the cleaning rod (8) to separate from the filter rod (3) when the cleaning rod (8) moves to the end position of the filter rod (3) and automatically reset when the cleaning rod (8) moves to the initial end position of the filter rod (3); The second filtering mechanism comprises a filter plate (17), the filter plate (17) is slidably matched with the inner wall of the box body (1), and the four corner positions of the front end of the filter plate (17) are fixedly connected with sliding rods (18), the sliding rods (18) pass through the two fixed frames (2) and are slidably connected with the two fixed frames (2), and the second sliding frame (7) is provided with driving rods (28) at both ends. The second sliding frame (7) is also slidably connected with the driving rods (28) at its two ends; the four sliding rods (18) are fixedly connected with the driving rods (28) on the front and rear sides.

2. The exhaust gas purification unit for an air jet loom according to claim 1, characterized in that: The front fixed frame (2) and the filter rod (3) are vertically distributed, and the rear fixed frame (2) and the filter rod (3) are horizontally distributed; the filter rod (3) is wavy and bends back and forth; the bottom side portion of the front filter rod (3) and the right side portion of the rear filter rod (3) are both right-angled and extend backward.

3. The exhaust gas purification unit for an air jet loom according to claim 1, characterized in that: The middle portion of the front end of the limiting rod (6) is in the shape of a sharp angle protruding forward, and the width of the limiting rod (6) is greater than the diameter of the reciprocating screw rod (4).

4. The exhaust gas purification unit for an air jet loom according to claim 1, characterized in that: The separation mechanism comprises two fixed rods (10), the two fixed rods (10) are distributed on both sides of the reciprocating screw rod (4) and the two fixed rods (10) are fixedly connected to the first sliding frame (5); the fixed rod (10) is slidably connected to the second sliding frame (7) and a clamping block (11) is slidably connected to the front position of the fixed rod (10), the clamping block (11) is engaged with the second sliding frame (7) and the other end of the clamping block (11) is fixedly connected to a sliding block (12), the sliding block (12) is fixedly connected to a second spring (13), and the other end of the second spring (13) is fixedly connected to the fixed rod (10); the sliding block (12) is slidably connected to the fixed rod (10), and the sliding block on the front side is fixedly connected to the second sliding frame (7). The first push block (14) is fixedly connected to the position just above the (12) and the position just to the left of the rear sliding block (12), and the first push block (14) is fixedly connected to the box body (1); the second sliding frame (7) is symmetrically connected to the rotating rod (15) at the positions on both sides of the reciprocating screw rod (4), and a torsion spring is provided at the connection between the rotating rod (15) and the second sliding frame (7); the rotating rod (15) on the front side is inclined with the upper end at the front and the lower end at the back; the rotating rod (15) on the rear side is inclined with the left end at the front and the rear end at the back; the second push block (16) is provided at the position below the rotating rod (15) on the front side and the right side of the rotating rod (15), and the second push block (16) is fixedly connected to the box body (1).

5. The exhaust gas purification unit for an air jet loom according to claim 1, characterized in that: The second cleaning mechanism comprises two third sliding frames (19), the two third sliding frames (19) are symmetrically distributed on the left and right sides of the filter plate (17), and the two third sliding frames (19) are both slidably connected to the filter plate (17); a plurality of brushes (20) are fixedly connected to the third sliding frame (19), and the plurality of brushes (20) are all in contact with the front surface of the filter plate (17); a connecting rod (21) is rotatably connected to the third sliding frame (19), and the other ends of the connecting rods (21) on the left and right sides are respectively rotatably connected to the left and right side parts of the box body (1).

6. The exhaust gas purification unit for an air jet loom according to claim 1, characterized in that: The driving mechanism comprises a motor (22), the motor (22) is located at the right side of the housing (1) and the motor (22) is fixedly connected to the housing (1); the output shaft of the motor (22) is fixedly connected to the rear reciprocating screw (4); the left end of the rear reciprocating screw (4) is fixedly connected to a first bevel gear (23), the upper side of the first bevel gear (23) is meshed with a second bevel gear (24), the upper end of the second bevel gear (24) is fixedly connected to a first pulley (25), and the second bevel gear (24) and the first pulley (25) are both rotatably connected to the housing (1); the upper end of the front reciprocating screw (4) is fixedly connected to a second pulley (26), the second pulley (26) is meshed with a belt (27), and the belt (27) is simultaneously meshed with the first pulley (25).

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