Adjustable screw compressor

Abstract

The invention discloses an adjustable screw compressor which comprises a screw compressor body, a configuration box, a rotating rod, a ratchet wheel, a scraping plate, a reciprocating rod, a shifting plate, a first matching plate and a second matching plate. The movable assembly is used for enabling clearance rotation of the scrapers on the ratchet wheel to act on the oil liquid through the shifting plate and enabling the second matching plate and the first matching plate for adjusting the angle to move the oil liquid; the adjusting assembly is used for adjusting the distance between the ratchet wheel and the bottom of the configuration box, enabling the scraper to be attached to the bottom of the configuration box all the time and enabling the first matching plate to adjust the angle; a ratchet wheel and a scraping plate rotate in a clearance mode through a reciprocating rod to drive a first matching plate to rotate, a pressing plate acts on a second matching plate to rotate in a reciprocating mode, so that oil liquid is moved and enters an output pipe, the oil liquid is injected through rotation of a blocking plate, and the accumulation thickness of oil liquid sediment is adjusted by adjusting the position of a rotating rod in a configuration box; and the bottom of the scraper is always attached to the bottom of the configuration box, so that the moving effect of the scraper on the oil is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of screw compressor structures, in particular to an adjustable screw compressor. Background Art

[0002] Screw compressors usually include a pair of intermeshing, opposite-rotating female and male rotors, with the female rotor being concave and the male rotor being convex. As the rotors rotate according to a certain transmission ratio, the volume of the rotor element changes due to the successive intrusion of the male and female rotors, the volume of the gas enclosed in the groove gradually decreases, and the pressure gradually increases. When the pressure rises to a certain value, the tooth groove communicates with the exhaust hole, and the high-pressure gas is discharged from the compressor and enters the oil separation device;

[0003] The oil-gas separation barrel in the existing screw compressor is connected to the oil filter. The oil enters the oil filter from the oil-gas separation barrel only through the squeezing of high-pressure gas. No device for moving the oil is provided to increase the entry efficiency and thus the filtering efficiency.

[0004] To this end, we propose an adjustable screw compressor. Summary of the invention

[0005] The object of the present invention is to provide an adjustable screw compressor to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides an adjustable screw compressor, comprising a screw compressor body and a configuration box connected to the screw compressor body, wherein a rotating rod is rotatably connected in the configuration box; further comprising: a ratchet wheel connected and fixed to the rotating rod, a movable groove is provided on the ratchet wheel, a gap is arranged between the ratchet wheel and the bottom of the configuration box, a scraper is movably matched with the bottom of the configuration box on the ratchet wheel, a reciprocating rod is also provided on the side of the configuration box, a toggle plate slidably matched with the ratchet wheel on the reciprocating rod, a first matching plate is movably matched in the movable groove, and a second matching plate is movably matched at the end of the toggle plate; a movable component, wherein the movable component drives the toggle plate through the reciprocating rod to rotate the scraper gap on the ratchet wheel and to make the second matching plate and the first matching plate for adjusting the angle move; an adjusting component, wherein the adjusting component is used to adjust the distance between the ratchet wheel and the bottom of the configuration box, to make the scraper always fit with the bottom of the configuration box, and to make the first matching plate adjust the angle.

[0007] Preferably, the movable component includes a sleeve rotatably connected to the reciprocating rod, the toggle plate is movably sleeved in the sleeve, the end of the second matching plate is rotatably connected to the inner wall of the configuration box through a torsion spring, and the sleeve moves horizontally in the configuration box.

[0008] Preferably, a limiting tube is fixedly connected to the sleeve, a limiting plate is movably fitted in the limiting tube to enable the reciprocating rod to reciprocate, and a plurality of through holes are formed on the second fitting plate.

[0009] Preferably, the movable component further comprises a slide plate, a sliding groove for the slide plate to slide is provided in the movable groove, an L-shaped rod is rotatably connected to the slide plate, and one end of the L-shaped rod is fixedly connected to the first matching plate.

[0010] Preferably, the adjustment assembly includes a limit ring plate fixedly connected to the top surface of the configuration box, a movable ring plate rotates inside the limit ring plate, two plug plates are fixedly connected to the movable ring plate, a plurality of plug holes are penetrated through the rotating rod, a plug rod passing through the plug holes is plugged into the plug plate, the rotating rod penetrates into the configuration box, and an elastic rod is connected between the two L-shaped rods and is pressed against the top of the scraper.

[0011] Preferably, the configuration box is also provided with an injection pipe and an output pipe, a movable disk reciprocatingly moves in the output pipe and is rotatably connected to the reciprocating rod, a plurality of rotating grooves are opened on the movable disk, a sealing plate is rotatably connected in the rotating groove, a pressure rod is fixedly connected to the end of the sealing plate, and the self-rotating reciprocating rod causes the sealing plate to rotate in the rotating groove.

[0012] Preferably, the sealing plate is fixedly connected with a rotating shaft located on the side of the rotating groove and rotatably connected to the movable plate, the reciprocating rod is fixedly connected with two rotating disks which are pressed and matched with the pressure rod, a plurality of grooves are provided on the rotating disk, the positions of the grooves on the two rotating disks are staggered, and the rotating groove is fixedly connected with a stopper which is pressed and matched with the sealing plate.

[0013] Preferably, a slide groove is provided on the reciprocating rod, the two ends of the slide groove are inclined, a slide column connected and fixed to the limit plate is slidably fitted in the slide groove, a pneumatic device is fixedly connected to the output pipe, and the movable rod of the pneumatic device penetrates into the output pipe and is connected and fixed to the central axis of the movable disk.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By making the reciprocating rod reciprocate, the toggle plate is driven to reciprocate. When the toggle plate moves close to the reciprocating rod, the ratchet wheel and the rotating rod are rotated. When the toggle plate moves away from the reciprocating rod, the ratchet wheel and the rotating rod are not rotated, so that the ratchet wheel drives the scraper to rotate in the gap, so that the scraper acts on the oil between the ratchet wheel and the bottom of the configuration box, so as to activate the oil and make the oil quickly enter the oil filter;

[0016] The first matching plate rotates with the ratchet at a certain tilt angle to further circulate the oil and prevent the oil from settling;

[0017] On the other hand, the second matching plate is made to reciprocate at a certain angle under the action of the torsion spring, so as to mobilize the oil, and under the action of the first matching plate, the second matching plate and the scraper, the mobilized oil enters the output pipe;

[0018] By adjusting the position of the rotating rod in the configuration box, the distance between the ratchet wheel and the bottom of the configuration box is adjusted, thereby adjusting the accumulation thickness of the oil liquid. The scraper is adaptively adjusted along the ratchet wheel, so that the bottom of the scraper is always in contact with the bottom of the configuration box, ensuring the activity effect of the scraper on the bottom oil liquid.

[0019] When the scraper is adjusted relative to the ratchet wheel, the first matching plate is driven to rotate and adjust the angle, thereby adaptively promoting the flow of oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic diagram of the screw compressor body structure of the present invention;

[0021] Figure 2 It is a left side schematic diagram of the screw compressor body structure of the present invention;

[0022] Figure 3 It is a rear view schematic diagram of the screw compressor body structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the configuration box and its connection structure in the body of the screw compressor of the present invention;

[0024] Figure 5 This is a schematic diagram of the configuration box and output tube of the present invention and its internal structure;

[0025] Figure 6 This is a schematic diagram of the internal structure of the configuration box and output tube of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the toggle plate of the present invention away from the ratchet wheel and the second matching plate;

[0027] Figure 8 It is a schematic structural diagram of the first matching plate and the movable ring plate of the present invention being separated;

[0028] Fig. 9 It is a structural schematic diagram of the scraper splitting ratchet of the present invention;

[0029] Fig.10 It is a structural schematic diagram of the reciprocating rod detached from the movable plate of the present invention;

[0030] Fig.11 It is a schematic diagram of the matching structure of the pressure rod and the rotating disk of the present invention;

[0031] Fig.12 It is a schematic diagram of the split structure of the rotating disk and the reciprocating rod of the present invention.

[0032] In the figure: 1, configuration box; 2, rotating rod; 3, ratchet; 4, movable groove; 5, scraper; 6, reciprocating rod; 7, toggle plate; 8, first matching plate; 9, second matching plate; 10, sleeve; 11, limit tube; 12, limit plate; 13, slide plate; 14, sliding groove; 15, L-shaped rod; 16, limit ring plate; 17, movable ring plate; 18, plug plate; 19, plug hole; 20, plug rod; 21. Elastic rod; 22. Injection pipe; 23. Output pipe; 24. Movable disk; 25. Rotating groove; 26. Sealing plate; 27. Pressure rod; 28. Rotating shaft; 29. ​​Rotating disk; 30. Groove; 31. Block; 32. Slide groove; 33. Slide column; 34. Air pressure device; 35. Screw main unit; 36. Oil-gas separation barrel; 37. Permanent magnet motor; 38. Oil filter; 39. Intake filter. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 10 The present invention provides an adjustable screw compressor, including a screw compressor body and the screw compressor body includes a fixed base, a screw main unit 35, an oil-gas separation barrel 36, a combination valve body, a permanent magnet motor 37, an oil filter 38, an air intake filter 39, and also includes a temperature sensor, an air intake valve, a refueling port located at the oil-gas separation barrel 36, and an oil sight glass. The internal structure of the screw compressor body and its connection relationship are prior art and are not described in detail;

[0035] In the present application, the injection pipe 22 is connected to the oil-gas separation barrel 36, and the output pipe 23 is connected to the oil filter 38;

[0036] A configuration box 1 is connected to the body of the screw compressor, and a rotating rod 2 is rotatably connected in the configuration box 1; it also includes: a ratchet 3 connected and fixed to the rotating rod 2, a movable groove 4 is opened on the ratchet 3, and a gap is arranged between the ratchet 3 and the bottom of the configuration box 1, and a scraper 5 movably cooperates with the bottom of the configuration box 1 on the ratchet 3, and a reciprocating rod 6 is also provided on the side of the configuration box 1, and a toggle plate 7 slidably cooperates with the ratchet 3 on the reciprocating rod 6, and a first matching plate 8 is movably cooperated in the movable groove 4, and a second matching plate 9 is movably cooperated at the end of the toggle plate 7; a movable component, the movable component drives the toggle plate 7 through the reciprocating rod 6 to make the rotation of the gap between the scraper 5 on the ratchet 3 act on the oil, and makes the second matching plate 9 and the first matching plate 8 for adjusting the angle move; an adjusting component, the adjusting component is used to adjust the distance between the ratchet 3 and the bottom of the configuration box 1, and make the scraper 5 always fit the bottom of the configuration box 1, and make the first matching plate 8 adjust the angle;

[0037] In the present application, the reciprocating rod 6 is reciprocated while driving the toggle plate 7 to reciprocate. On the one hand, when the toggle plate 7 moves close to the reciprocating rod 6, the ratchet 3 and the rotating rod 2 are rotated. When the toggle plate 7 moves away from the reciprocating rod 6, the ratchet 3 and the rotating rod 2 will not be rotated, so that the ratchet 3 drives the scraper 5 to rotate in a gap (always rotating in a clockwise direction), so that the scraper 5 acts on the oil between the ratchet 3 and the bottom of the configuration box 1 (the oil precipitation is mainly concentrated here), thereby mobilizing the oil;

[0038] And the first matching plate 8 rotates with the ratchet wheel 3 at a certain tilt angle to further activate the oil;

[0039] On the other hand, the second matching plate 9 is made to reciprocate at a certain angle under the action of the torsion spring, so as to mobilize the oil, and under the action of the first matching plate 8, the second matching plate 9 and the scraper 5, the mobilized oil and its sediment enter the output pipe 23;

[0040] By adjusting the position of the rotating rod 2 in the configuration box 1, the distance between the ratchet 3 and the bottom of the configuration box 1 is adjusted, thereby adjusting the accumulation thickness of the oil precipitation, wherein the scraper 5 is adaptively adjusted along the ratchet 3, so that the bottom of the scraper 5 is always in contact with the bottom of the configuration box 1, ensuring the activity effect of the scraper 5 on the oil;

[0041] When the scraper 5 is adjusted relative to the ratchet wheel 3, the first matching plate 8 is driven to rotate and adjust the angle, thereby adaptively promoting the flow of the oil.

[0042] The movable assembly includes a sleeve 10 rotatably connected to the reciprocating rod 6, the toggle plate 7 is movably sleeved in the sleeve 10, the end of the second matching plate 9 is rotatably connected to the inner wall of the configuration box 1 through a torsion spring, and the sleeve 10 moves horizontally in the configuration box 1;

[0043] The sleeve 10 is fixedly connected to a limit tube 11, and a limit plate 12 is movably matched inside the limit tube 11 to make the reciprocating rod 6 reciprocate, and a plurality of through holes are opened on the second matching plate 9;

[0044] The reciprocating rod 6 reciprocates, and under the limiting action of the limiting plate 12 and the limiting tube 11, the sleeve 10 maintains a stable reciprocating motion without angle change, and the reciprocating sleeve 10 causes the toggle plate 7 to reciprocate synchronously;

[0045] When the toggle plate 7 moves toward the reciprocating rod 6, the toggle plate 7 drives the ratchet wheel 3 to rotate counterclockwise, and the toggle plate 7 can move relative to the sleeve 10;

[0046] When the toggle plate 7 moves away from the reciprocating rod 6, the toggle plate 7 will not drive the ratchet wheel 3 to rotate, and the toggle plate 7 can move relative to the sleeve 10;

[0047] The toggle plate 7 can move relative to the sleeve 10 and press the second matching plate 9, so that the second matching plate 9 can reciprocate at a certain angle through the torsion spring.

[0048] The movable assembly further includes a slide plate 13. A sliding groove 14 for the slide plate 13 to slide is provided in the movable groove 4. An L-shaped rod 15 is rotatably connected to the slide plate 13. One end of the L-shaped rod 15 is fixedly connected to the first matching plate 8.

[0049] When the position of the scraper 5 is adjusted (when the distance between the ratchet 3 and the configuration box 1 is adjusted), the L-shaped rod 15 is driven to rotate, thereby adjusting the angle of the first matching plate 8, and the slide plate 13 moves along the sliding groove 14, so that the inclined first matching plate 8 moves synchronously, and the first matching plate 8 moves and adjusts relative to the movable groove 4, thereby adjusting the activity efficiency of the oil.

[0050] The adjustment assembly includes a limit ring plate 16 connected and fixed to the top surface of the configuration box 1, a movable ring plate 17 rotates inside the limit ring plate 16, two plug plates 18 are fixedly connected to the movable ring plate 17, a plurality of plug holes 19 are penetrated through the rotating rod 2, a plug rod 20 passing through the plug holes 19 is plugged into the plug plate 18, the rotating rod 2 penetrates into the configuration box 1, and an elastic rod 21 is connected between the two L-shaped rods 15 to press against the top of the scraper 5;

[0051] Remove the sealing cover between the oil-gas separation barrel 36 and the oil filter 38 to expose the top surface of the configuration box 1, then manually move the rotating rod 2, and insert the plug rod 20 into the two plug plates 18 and the plug hole 19 at the same time to complete the fixation of the rotating rod 2 after the adjustment, thereby moving the ratchet 3, adjusting the distance between the ratchet 3 and the bottom of the configuration box 1, and finally reinstalling and fixing the sealing cover;

[0052] When the ratchet wheel 3 rotates, the rotating rod 2 is driven to rotate, thereby causing the plug-in rod 20 and the plug-in plate 18 to rotate, and the movable ring plate 17 rotates in the limiting ring plate 16;

[0053] The gap between two adjacent plug holes 19 is relatively large, so as to prevent the plug holes 19 from being located inside and outside the configuration box 1 at the same time, and to prevent the oil in the configuration box 1 from overflowing.

[0054] See also Figure 1-Figure 6 and Figure 10-12 The configuration box 1 is also provided with an injection pipe 22 and an output pipe 23. A movable disk 24 rotatably connected to the reciprocating rod 6 reciprocates in the output pipe 23. A plurality of rotating grooves 25 are provided on the movable disk 24. A blocking plate 26 is rotatably connected in the rotating groove 25. A pressing rod 27 is fixedly connected to the end of the blocking plate 26. The rotating reciprocating rod 6 causes the blocking plate 26 to rotate in the rotating groove 25.

[0055] When the movable plate 24 moves along the output pipe 23 toward the sleeve 10, the reciprocating rod 6 moves synchronously, and quickly rotates a certain angle and then keeps moving at the angle, so that the blocking plate 26 rotates and the rotating groove 25 opens, so that the oil enters the output pipe 23 through the rotating groove 25;

[0056] When the movable plate moves along the output pipe 23 away from the sleeve 10, the reciprocating rod 6 quickly rotates a certain angle and keeps moving at the angle, so that the blocking plate 26 rotates to block the rotating groove 25, so that the rotating groove 25 is closed, so that the movable movable plate 24 drives the oil to further enter the deep of the output pipe 23, thereby completing the injection of the injection liquid.

[0057] The blocking plate 26 is fixedly connected with a rotating shaft 28 located at the side of the rotating groove 25 and rotatably connected with the movable plate 24. The reciprocating rod 6 is fixedly connected with two self-rotating discs 29 that are pressed and matched with the pressing rod 27. The self-rotating discs 29 are provided with a plurality of grooves 30. The positions of the grooves 30 on the two self-rotating discs 29 are staggered. The rotating groove 25 is fixedly connected with a stopper 31 that is pressed and matched with the blocking plate 26.

[0058] When the reciprocating rod 6 rotates, it drives the self-rotating disc 29 to rotate, the groove 30 of one rotating disc contacts the pressing rod 27, and the edge of the other rotating disc at a position other than the groove 30 contacts the pressing rod 27, and the pressing rod 27 is acted on in both directions, so that the pressing rod 27 tilts, thereby causing the blocking plate 26 to rotate with the rotating shaft 28, closing the rotating groove 25 or opening the rotating groove 25;

[0059] The rotating shaft 28 is located on the side of the rotating groove 25, so that one side of the sealing plate 26 acts on the rotating groove 25, and the other side of the sealing plate 26 cooperates with the self-rotating disk 29, and the other side of the sealing plate 26 does not affect the rotating groove 25, so that oil will not enter and affect the self-rotating disk 29, thereby ensuring the sealing effect of the sealing plate 26 on the rotating groove 25.

[0060] A slide groove 32 is provided on the reciprocating rod 6, and both ends of the slide groove 32 are inclined (the middle of the slide groove 32 is a straight section, and both ends of the slide groove 32 are inclined sections). A slide column 33 connected and fixed to the limit plate 12 is slidably matched in the slide groove 32, and a pneumatic device 34 is fixedly connected to the output pipe 23. The movable rod of the pneumatic device 34 penetrates the output pipe 23 and is connected and fixed to the central axis of the movable disk 24.

[0061] In the present application, the air pressure device 34 is used to make the movable disk 24 reciprocate along the output pipe 23, and the reciprocating rod 6 is moved synchronously, and the reciprocating rod 6 is connected to the movable disk 24 by rotation. When the reciprocating rod 6 reciprocates with the movable disk 24, under the restriction of the sliding column 33, the reciprocating rod 6 first rotates a certain angle and then reciprocates at the angle;

[0062] When the reciprocating rod 6 moves from one direction to the opposite direction, the slide post 33 is located at the end of the slide slot 32, that is, the inclined section of the slide slot 32, so that the reciprocating rod 6 rotates quickly.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable screw compressor, comprising: A screw compressor body and a configuration box (1) connected to the screw compressor body, wherein a rotating rod (2) is rotatably connected inside the configuration box (1); It is characterized by further comprising: A ratchet (3) connected and fixed to the rotating rod (2), the ratchet (3) being provided with a movable groove (4), the ratchet (3) being arranged with a gap between the ratchet (3) and the bottom of the configuration box (1), the ratchet (3) being movably matched with a scraper (5) for scraping the bottom of the configuration box (1), a reciprocating rod (6) being further provided on the side of the configuration box (1), the reciprocating rod (6) being slidably matched with a toggle plate (7) for matching with the ratchet (3), a first matching plate (8) being movably matched in the movable groove (4), and a second matching plate (9) being movably matched at the end of the toggle plate (7); A movable component, wherein the movable component drives the toggle plate (7) through the reciprocating rod (6) to rotate the clearance of the scraper plate (5) on the ratchet wheel (3) to activate the oil, and the second matching plate (9) and the first matching plate (8) for adjusting the angle are activated by the oil; An adjustment component is used to adjust the distance between the ratchet (3) and the bottom of the configuration box (1), so that the scraper (5) always fits the bottom of the configuration box (1), and the first matching plate (8) is adjusted in angle.

2. The adjustable screw compressor according to claim 1, characterized in that: The movable assembly comprises a sleeve (10) rotatably connected to the reciprocating rod (6), the toggle plate (7) is movably sleeved in the sleeve (10), the end of the second matching plate (9) is rotatably connected to the inner wall of the configuration box (1) via a torsion spring, and the sleeve (10) moves horizontally in the configuration box (1).

3. The adjustable screw compressor according to claim 2, characterized in that: The sleeve (10) is fixedly connected to a limit tube (11), and a limit plate (12) is movably engaged in the limit tube (11) to enable the reciprocating rod (6) to reciprocate, and a plurality of through holes are formed in the second engaging plate (9).

4. The adjustable screw compressor according to claim 3, characterized in that: The movable assembly further comprises a slide plate (13), a sliding groove (14) for the slide plate (13) to slide is provided in the movable groove (4), an L-shaped rod (15) is rotatably connected to the slide plate (13), and one end of the L-shaped rod (15) is fixedly connected to the first matching plate (8).

5. The adjustable screw compressor according to claim 4, characterized in that: The adjustment assembly comprises a limit ring plate (16) connected and fixed to the top surface of the configuration box (1), a movable ring plate (17) rotates inside the limit ring plate (16), two plug plates (18) are fixedly connected to the movable ring plate (17), a plurality of plug holes (19) are penetrated through the rotating rod (2), a plug rod (20) passing through the plug holes (19) is plugged into the plug plate (18), the rotating rod (2) penetrates into the configuration box (1), and an elastic rod (21) is connected between the two L-shaped rods (15) and is pressed against the top of the scraper (5).

6. The adjustable screw compressor according to claim 5, characterized in that: The configuration box (1) is also provided with an injection pipe (22) and an output pipe (23). A movable disk (24) is reciprocatingly disposed in the output pipe (23) and is rotatably connected to the reciprocating rod (6). A plurality of rotation grooves (25) are provided on the movable disk (24). A sealing plate (26) is rotatably connected in the rotation groove (25). A pressing rod (27) is fixedly connected to the end of the sealing plate (26). The reciprocating rod (6) rotates to cause the sealing plate (26) to rotate in the rotation groove (25).

7. An adjustable screw compressor according to claim 6, characterized in that: The sealing plate (26) is fixedly connected to a rotating shaft (28) located on the side of the rotating groove (25) and rotatably connected to the movable plate (24); the reciprocating rod (6) is fixedly connected to two rotating disks (29) that are pressed against the pressure rod (27); a plurality of grooves (30) are formed on the rotating disk (29); the grooves (30) on the two rotating disks (29) are arranged in a staggered manner; and a stopper (31) that is pressed against the sealing plate (26) is fixedly connected to the rotating groove (25).

8. An adjustable screw compressor according to claim 7, characterized in that: The reciprocating rod (6) is provided with a slide groove (32), the two ends of the slide groove (32) are inclined, a slide column (33) is slidably matched in the slide groove (32) and is connected and fixed to the limit plate (12), and a pneumatic device (34) is fixedly connected to the output pipe (23), and a movable rod of the pneumatic device (34) penetrates into the output pipe (23) and is connected and fixed to the central axis of the movable disk (24).

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