CN211636235U

CN211636235U - A reation kettle for producing glue

Info

Publication number: CN211636235U
Application number: CN202020135406.1U
Authority: CN
Inventors: 吴朋钱; 寇光亮; 吴梓博
Original assignee: Zhejiang Duobang New Materials Co ltd
Current assignee: Zhejiang Duobang New Materials Co ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-10-09
Anticipated expiration: 2030-01-20

Abstract

The utility model belongs to the technical field of material mixing equipment's technique and specifically relates to a reation kettle for producing glue is related to, it includes the cauldron body and agitating unit, the feed inlet has been seted up at cauldron body top, the discharge opening has been seted up to cauldron body bottom, just install the discharge tube on the discharge opening, be provided with the discharge valve on the discharge tube, agitating unit includes (mixing) shaft, stirring leaf and drive (mixing) shaft and stirring leaf pivoted agitator motor, agitator motor sets up in the top of the cauldron body, be provided with the auger that is used for the help ejection of compact in the discharge tube, the auger includes auger shaft and the auger blade of fixed connection on auger shaft lateral wall, the epaxial drive auger shaft pivoted drive assembly that is connected with of auger. The utility model discloses a auger that sets up in the discharge tube makes glue be difficult to the adhesion on the discharge tube when the ejection of compact to have the effect of accelerating ejection of compact speed, improve production efficiency.

Description

A reation kettle for producing glue

Technical Field

The utility model belongs to the technical field of material mixing equipment's technique and specifically relates to a reation kettle for producing glue is related to.

Background

The broad understanding of the reaction kettle is that the reaction kettle is a container for physical or chemical reaction, and the heating, evaporation, cooling and low-speed mixing functions required by the process are realized through the structural design and parameter configuration of the container. The reaction kettle is widely applied to pressure vessels for petroleum, chemical engineering, rubber, pesticides, dyes, medicines and foods, and is used for completing technological processes such as vulcanization, nitration, hydrogenation, alkylation, polymerization, condensation and the like, such as a reactor, a reaction kettle, a decomposition kettle, a polymerization kettle and the like; the material is generally carbon manganese steel, stainless steel, zirconium, nickel-based (Hastelloy, Monel, Inconel) alloy and other composite materials.

The patent with the publication number of CN106422864A discloses a circumferential flow stirring kettle, which comprises a kettle body and a stirring shaft; the top of the kettle body is provided with a feed inlet, the bottom of the kettle body is provided with a discharge outlet, and the bottom of the kettle body is provided with a discharge valve; the stirring shaft is arranged in the kettle body through a bearing, the top of the stirring shaft extends upwards to the outside of the kettle body, and stirring blades which are spirally arranged are arranged on the stirring shaft; a circular backflow frame is arranged in the kettle body and fixedly connected with the stirring shaft, backflow blades spirally distributed around the stirring shaft are fixed on the backflow frame, the spiral axis of the backflow blade is overlapped with the spiral axis of the stirring blade, and the spiral direction of the backflow blade is opposite to the spiral direction of the stirring blade; and a plurality of scraping plates for scraping materials on the inner wall of the kettle body are fixed on the backflow frame.

The above prior art solutions have the following drawbacks: when this stirred tank was used for producing glue, because of glue has certain viscidity, after glue stirs the completion in stirred tank, during the ejection of compact, glue easy adhesion in discharge opening department leads to ejection of compact speed slow to influence production efficiency.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a reation kettle for producing glue through the auger that sets up in the discharge tube, when the ejection of compact, makes glue be difficult to the adhesion on the discharge tube to have the effect of accelerating ejection of compact speed, improve production efficiency.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a reation kettle for producing glue, includes the cauldron body and agitating unit, the feed inlet has been seted up at cauldron body top, the discharge opening has been seted up to cauldron body bottom, just install the discharge tube on the discharge opening, be provided with the discharge valve on the discharge tube, agitating unit includes (mixing) shaft, stirring leaf and drive (mixing) shaft and stirring leaf pivoted agitator motor, agitator motor sets up in the top of the cauldron body, be provided with the auger that is used for the help ejection of compact in the discharge tube, the auger includes auger axle and fixed connection auger blade on auger axle lateral wall, the epaxial drive assembly that is connected with drive auger axle pivoted of auger.

Through adopting above-mentioned technical scheme, during the ejection of compact, open the discharge valve, drive assembly drives the auger axle and rotates, and the auger axle rotates and drives fixed connection and rotate in the epaxial auger blade of auger, makes glue be difficult to the adhesion on the discharge tube to discharge speed has been accelerated, improvement production efficiency.

The present invention may be further configured in a preferred embodiment as: the discharge opening is skew the axis setting of the cauldron body, drive assembly includes first gear and second gear, on the coaxial output shaft that is fixed in agitator motor of first gear, the coaxial auger that is fixed in of second gear is served in the one that stretches out cauldron body top in the axial, first gear and second gear meshing.

By adopting the technical scheme, the stirring motor is driven to drive the output shaft of the stirring motor to rotate, the output shaft of the stirring motor drives the first gear fixedly connected with the stirring motor to rotate, the first gear drives the second gear meshed with the first gear to rotate, the second gear drives the auger shaft to rotate, the auger shaft rotates to drive the auger blade to rotate, and the auger is driven to rotate by the stirring motor, so that the operation is convenient and simple.

The present invention may be further configured in a preferred embodiment as: the upper end of the stirring shaft penetrates out of the kettle body and is fixedly connected with a third gear, the heights of the upper end surfaces of the second gear and the third gear are different, and a lifting piece for controlling the first gear to be meshed with the second gear or the first gear to be meshed with the third gear or the first gear to be meshed with the second gear and the third gear is arranged on the stirring motor.

By adopting the technical scheme, when the lifting piece controls the first gear to be only meshed with the second gear, the stirring motor drives the packing auger to rotate through the first gear and the second gear, so that the effect of facilitating discharging is achieved; when the lifting piece controls the first gear to be only meshed with the third gear, the stirring motor drives the stirring shaft and the stirring blades to rotate through the first gear and the third gear, and the effects of stirring and accelerating mixing are achieved; when the lifting piece controls the first gear to be meshed with the second gear and the third gear simultaneously, the stirring motor drives the packing auger and the stirring shaft to rotate simultaneously through the first gear, the second gear and the third gear, and meanwhile, the effects of accelerating mixing and facilitating discharging are achieved.

The present invention may be further configured in a preferred embodiment as: the lifting piece comprises an electric cylinder and a connecting block, the connecting block is fixedly connected with the shell of the stirring motor, the electric cylinder is fixedly connected onto the kettle body, and an output rod of the electric cylinder is fixedly connected with the connecting block.

Through adopting above-mentioned technical scheme, the electric jar drives agitator motor and goes up and down, further makes convenient operation simple, labour saving and time saving when making the operation workman operate.

The present invention may be further configured in a preferred embodiment as: the feeding device is characterized in that the feeding port is connected with an installation plate, and the installation plate is connected with a first supporting block and a second supporting block which are used for supporting the material barrel.

Through adopting above-mentioned technical scheme, when the feeding to feed inlet department, the operation workman moves the material bucket to first supporting shoe and second supporting shoe on, first supporting shoe and second supporting shoe play the effect of support to the material, only need the operation workman hold up the material bucket can, no longer need lift the material bucket all the time until the material adds and finishes, make the operation workman when empting the material to the feed inlet to a certain extent, the operation is light laborsaving more, and has the effect that improves work efficiency to a certain extent.

The present invention may be further configured in a preferred embodiment as: the second supporting block is located on one side, away from the feeding hole, of the first supporting block, a sliding groove is formed in the second supporting block, a sliding block is connected to the sliding groove in a sliding mode, and a lifting assembly used for controlling the sliding block to lift is arranged on the sliding block.

By adopting the technical scheme, the lifting component drives the sliding block to slide in the sliding groove on the second supporting block along the depth direction of the sliding groove; when an operator lifts the material barrel and places the material barrel on the first supporting block and the second supporting block, the lifting assembly is driven to drive the sliding block to descend, and then the material barrel is placed on the first supporting block and the sliding block; when empting the material in the material bucket, drive lifting unit drive slider rises, makes material barrel head portion upwards lift, further makes things convenient for the material in the material bucket to get into in the feed inlet, this moment the operation workman only need hold up the material bucket can, make the light laborsaving of operation.

The present invention may be further configured in a preferred embodiment as: the lifting assembly comprises a gear and a rack, the rack is fixedly connected to the sliding block, and a connecting groove for the rack to penetrate through is formed in the second supporting block; the gear is meshed with the rack, a connecting rod is fixedly connected to the gear shaft core, and a limiting device for preventing the gear and the rack from disengaging is arranged on the connecting rod.

By adopting the technical scheme, the connecting rod is rotated to drive the gear to rotate, the gear rotates to drive the rack to move along the length direction of the rack, and when the rack moves along the length direction of the rack to drive the sliding block to ascend, the sliding block ascends to drive the bottom of the material barrel to ascend, so that the material in the material barrel can enter the feeding port conveniently; when the rack moves along the length direction of the rack to drive the sliding block to descend, the sliding block descends to enable an operator to place materials on the first supporting block and the second supporting block more conveniently; the limiting device can effectively prevent the gear and the rack from being separated, and when the connecting rod is rotated, the gear drives the rack to lift.

The present invention may be further configured in a preferred embodiment as: the limiting device comprises a limiting block and a clamping block, the limiting block is fixedly connected to the second supporting block, a through hole for the connecting rod to pass through and a groove for mounting the gear are formed in the limiting block, and a clamping groove which is coaxial with the through hole is formed in the side wall of the through hole; the clamping block is coaxially fixed on the connecting rod, and the clamping block and the clamping groove are clamped in the axial direction of the connecting rod and are rotatably connected in the circumferential direction of the connecting rod; one end of the connecting rod, which is far away from the gear, is fixedly connected with an operating handle.

By adopting the technical scheme, the gear is arranged in the groove of the limiting block, and has the function of protecting the gear to a certain extent; the connecting rod coaxially fixed with the gear penetrates through the through hole in the limiting block and penetrates out of the limiting block, and the clamping groove formed in the side wall of the through hole is clamped with the clamping block on the connecting rod in the axial direction of the connecting rod and is rotatably connected in the circumferential direction of the connecting rod, so that the gear and the rack can be effectively prevented from being disengaged; and one end of the connecting rod is provided with an operating handle, so that the connecting rod is further convenient for an operator to rotate.

To sum up, the utility model discloses a following at least one useful technological effect:

1. by the auger arranged in the discharge pipe, glue is not easy to adhere to the discharge pipe during discharging, the effect of accelerating the discharging speed is achieved, and the production efficiency is improved;

2. the first gear on the output shaft of the stirring motor, the second gear on the auger shaft, the third gear on the stirring shaft and the electric cylinder driving the stirring motor to lift enable the stirring motor to flexibly control the rotation of the auger shaft, the rotation of the stirring shaft and the simultaneous rotation of the auger shaft and the stirring shaft, thereby having the effect of saving energy consumption to a certain extent and being convenient and simple to operate;

3. play the effect of support to the material bucket through first supporting shoe and second supporting shoe, make the operation workman when empting the material bucket and make the material get into the feed inlet to a certain extent, the operation is light laborsaving more to have the effect that improves work efficiency to a certain extent.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the stirring device and the packing auger of the present invention;

FIG. 3 is an enlarged partial schematic view of portion A of FIG. 1;

fig. 4 is an exploded view of the mounting plate mounting structure of the present invention;

fig. 5 is a schematic structural view of the first support block and the second support block of the present invention;

fig. 6 is a schematic structural view of the lifting assembly of the present invention.

In the figure, 1, a kettle body; 11. a discharge opening; 12. a discharge pipe; 121. a discharge valve; 13. a feed inlet; 14. a threaded rod; 141. fastening a nut; 15. a material barrel; 151. a placement groove; 2. mounting a plate; 21. a first support block; 22. a baffle plate; 23. collecting tank; 24. a through hole; 3. a second support block; 31. a chute; 32. a slider; 4. a lifting assembly; 41. a rack; 42. a gear; 43. a connecting rod; 431. an operating handle; 5. a limiting device; 51. a limiting block; 511. a groove; 512. perforating; 513. a card slot; 52. a clamping block; 6. a packing auger; 61. a packing auger shaft; 62. a screw blade; 7. a stirring device; 71. a stirring motor; 72. a stirring shaft; 721. a third gear; 73. stirring blades; 8. a lifting member; 81. connecting blocks; 82. an electric cylinder; 9. a drive assembly; 91. a first gear; 92. a second gear.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, for the utility model discloses a reation kettle for producing glue, including the cauldron body 1 and agitating unit 7.

The stirring device 7 comprises a stirring shaft 72, a stirring blade 73 fixedly connected to the stirring shaft 72, and a stirring motor 71 for driving the stirring shaft 72 and the stirring blade 73 to rotate. The stirring shaft 72 coincides with the axis of the kettle body 1, and the stirring blades 73 are arranged in a spiral shape.

Discharge opening 11 has been seted up to cauldron body 1 bottom, fixedly connected with and the discharge tube 12 of the inside intercommunication of the cauldron body 1 on discharge opening 11, and the discharge valve 121 that is used for controlling discharge tube 12 switching is installed to cauldron body 1 bottom.

Discharge opening 11 and the skew axis setting of cauldron body 1 of discharge tube 12 are provided with the auger 6 that is used for helping the ejection of compact on the discharge opening 11, and auger 6 includes auger shaft 61 and auger blade 62 of fixed connection on auger shaft 61 lateral wall, and auger blade 62 stretches into in discharge tube 12, and upwards extends along auger shaft 61 length direction, is connected with drive auger shaft 61 pivoted drive assembly 9 on the auger shaft 61.

The drive assembly 9 comprises a first gear 91 and a second gear 92. The stirring motor 71 is arranged at the top of the kettle body 1, the first gear 91 is coaxially and fixedly connected to an output shaft of the stirring motor 71, the second gear 92 is coaxially and fixedly connected to one end of the auger shaft 61 extending upwards out of the kettle body 1, the upper end of the stirring shaft 72 penetrates out of the kettle body 1 and is fixedly connected with a third gear 721, and the height of the upper end face of the second gear 92 is smaller than that of the upper end face of the third gear 721.

Referring to fig. 1 and 3, the stirring motor 71 is provided with a lifting member 8 for controlling the engagement of the first gear 91 and the second gear 92, the engagement of the first gear 91 and the third gear 721, or the engagement of the first gear 91, the second gear 92 and the third gear 721. The lifting piece 8 comprises an electric cylinder 82 and a connecting block 81, the connecting block 81 is fixedly connected to the shell of the stirring motor 71, the electric cylinder 82 is fixedly connected to the upper end of the kettle body 1, and the output shaft of the electric cylinder 82 is fixedly connected with the connecting block 81.

Referring to fig. 1 and 4, the top of the kettle body 1 is set into a circular arc shape, a feed inlet 13 is formed in the top of the kettle body 1, the feed inlet 13 protrudes out of the kettle body 1, a mounting plate 2 is arranged below the feed inlet 13, the mounting plate 2 is set into a fan shape, the side wall of the mounting plate 2 is abutted against the side wall of the feed inlet 13, and the bottom wall of the mounting plate 2 is abutted against the outer wall of the kettle body 1.

Fixedly connected with threaded rod 14 on the cauldron body 1, threaded rod 14 perpendicular to mounting panel 2 sets up, sets up the through-hole 24 that supplies threaded rod 14 to pass on the mounting panel 2, and threaded rod 14 has fastening nut 141 after passing mounting panel 2 threaded connection, and fastening nut 141 supports tightly with mounting panel 2.

Referring to fig. 1 and 5, the mounting plate 2 is provided with a first support block 21 and a second support block 3 for supporting the material barrel 15, and the second support block 3 is located on one side of the first support block 21 away from the feed port 13. First supporting shoe 21 and second supporting shoe 3 are all fixed connection on mounting panel 2, and perpendicular to mounting panel 2 extends to the direction of keeping away from the cauldron body 1.

The equal fixedly connected with baffle 22 in first supporting block 21 both sides, baffle 22 diapire and mounting panel 2 fixed connection, the lateral wall of one side and the contact of 13 lateral walls of feed inlet of first supporting block 21 are kept away from to baffle 22, and baffle 22, first supporting block 21 and mounting panel 2 form the collecting vat 23 that is used for collecting the material that spills from feed inlet 13.

Referring to fig. 5 and 6, a sliding groove 31 is formed in the second supporting block 3 along the height direction thereof, and a sliding block 32 is slidably connected to the sliding groove 31. The slide block 32 is provided with a lifting component 4 for controlling the slide block 32 to lift.

The lifting component 4 comprises a gear 42 and a rack 41, the rack 41 is fixedly connected to the slider 32, and a connecting groove for the rack 41 to pass through is formed in the second supporting block 3. The gear 42 is meshed with the rack 41, the axis of the gear 42 is fixedly connected with a connecting rod 43, and the connecting rod 43 is arranged in parallel with the mounting plate 2.

The connecting rod 43 is provided with a limiting device 5 for preventing the gear 42 from disengaging from the rack 41, and the limiting device 5 comprises a limiting block 51 and a clamping block 52. The limiting block 51 is fixedly connected to the second supporting block 3, and the limiting block 51 is located on a side of the second supporting block 3 away from the first supporting block 21. The limiting block 51 is provided with a groove 511 for mounting the gear 42, and the limiting block 51 provided with the groove 511 is U-shaped. The limiting block 51 is provided with a through hole 512 for the connecting rod 43 to pass through, and the side wall of the through hole 512 is provided with a clamping groove 513 coaxially arranged with the through hole 512. The latch 52 is fixedly connected to an end portion of one end of the connecting rod 43, the engaging groove 513 and the latch 52 are both configured in a circular shape, and the latch 52 and the engaging groove 513 are engaged with each other in an axial direction of the connecting rod 43 and rotatably connected in a circumferential direction of the connecting rod 43. An operating handle 431 is fixedly connected to one end of the connecting rod 43 away from the fixture block 52.

The upper end surfaces of the sliders 32 on the first supporting block 21 and the second supporting block 3 are provided with a placing groove 151 for placing the material barrel 15 conveniently, and the placing groove 151 is arc-shaped.

The implementation principle of the embodiment is as follows:

during feeding, the operating handle 431 on the connecting rod 43 is firstly rotated to drive the gear 42 to rotate, the gear 42 rotates to drive the rack 41 to move downwards, the rack 41 descends to enable the sliding block 32 fixedly connected with the rack 41 to descend, and then the material barrel 15 is placed on the preventing grooves of the first supporting block 21 and the sliding block 32. After an operator holds the material barrel 15, the operating handle 431 is rotated to drive the gear 42 to rotate, the gear 42 rotates to drive the rack 41 to move upwards, the rack 41 rises to enable the sliding block 32 fixedly connected with the rack 41 to rise, the bottom of the material barrel 15 is lifted upwards, the material in the material barrel 15 can enter the feeding hole 13 conveniently, the first supporting block 21 and the sliding block 32 support the material barrel 15 at the moment, and the operation of the operator is easy and labor-saving.

When the material spills from feed inlet 13 during the feeding, the spilled material is collected in baffle 22, first supporting block 21 and the collecting vat 23 of mounting panel 2 formation, later when needing to wash collecting vat 23, unscrew mounting panel 2 from threaded rod 14 with fastening nut 141 to conveniently clear up collecting vat 23.

When the mounting plate 2 is remounted, the through hole 24 on the mounting plate 2 only needs to penetrate through the threaded rod 14, and then the fastening nut 141 is screwed until the fastening nut 141 is tightly abutted against the mounting plate 2.

During stirring, the driving electric cylinder 82 drives the stirring motor 71 to ascend, so that the first gear 91 on the output shaft of the stirring motor 71 is meshed with the third gear 721 on the stirring shaft 72 and is separated from the second gear 92 on the auger shaft 61, and the stirring shaft 72 and the stirring blades 73 rotate to play a role in accelerating mixing.

The driving electric cylinder 82 drives the stirring motor 71 to descend, and when the first gear 91 on the output shaft of the stirring motor 71 is meshed with the third gear 721 on the stirring shaft 72 and is meshed with the second gear 92 on the auger shaft 61, the stirring motor 71 simultaneously drives the stirring shaft 72 and the auger shaft 61 to rotate, and meanwhile, the effects of accelerating mixing and facilitating blanking are achieved.

When discharging, the driving electric cylinder 82 drives the stirring motor 71 to descend, when the first gear 91 on the output shaft of the stirring motor 71 is meshed with the second gear 92 on the auger shaft 61 and is separated from the third gear 721 on the stirring shaft 72, the stirring shaft 72 stops rotating, the auger shaft 61 rotates, and the effect of facilitating discharging is achieved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a reation kettle for producing glue, includes the cauldron body (1) and agitating unit (7), feed inlet (13) have been seted up at cauldron body (1) top, discharge opening (11) have been seted up to cauldron body (1) bottom, just install discharge tube (12) on discharge opening (11), be provided with discharge valve (121) on discharge tube (12), agitating unit (7) include (mixing) shaft (72), stirring leaf (73) and drive (mixing) shaft (72) and stirring leaf (73) pivoted agitator motor (71), agitator motor (71) set up in the top of the cauldron body (1), its characterized in that: be provided with auger (6) that are used for the help ejection of compact in discharge tube (12), auger (6) include auger axle (61) and fixed connection auger blade (62) on auger axle (61) lateral wall, be connected with drive auger axle (61) pivoted drive assembly (9) on auger axle (61).

2. The reaction kettle for producing glue according to claim 1, characterized in that: discharge opening (11) are skew the axis setting of the cauldron body (1), drive assembly (9) include first gear (91) and second gear (92), first gear (91) coaxial be fixed in on the output shaft of agitator motor (71), second gear (92) coaxial be fixed in auger shaft (61) upwards stretch out on the one end at cauldron body (1) top, first gear (91) and second gear (92) meshing.

3. The reaction kettle for producing glue according to claim 2, characterized in that: the upper end of the stirring shaft (72) penetrates out of the kettle body (1) and is fixedly connected with a third gear (721), the heights of the upper end faces of the second gear (92) and the third gear (721) are different, and a lifting piece (8) for controlling the first gear (91) to be meshed with the second gear (92), or the first gear (91) to be meshed with the third gear (721), or the first gear (91) to be meshed with the second gear (92) and the third gear (721) is arranged on the stirring motor (71).

4. A reaction kettle for producing glue according to claim 3, characterized in that: the lifting piece (8) comprises an electric cylinder (82) and a connecting block (81), the connecting block (81) is fixedly connected with the shell of the stirring motor (71), the electric cylinder (82) is fixedly connected onto the kettle body (1), and an output rod of the electric cylinder (82) is fixedly connected with the connecting block (81).

5. The reaction kettle for producing glue according to claim 1, characterized in that: the material barrel is characterized in that the feed port (13) is connected with a mounting plate (2), and the mounting plate (2) is connected with a first supporting block (21) and a second supporting block (3) which are used for supporting the material barrel (15).

6. The reaction kettle for producing glue according to claim 5, characterized in that: the second supporting block (3) is located on one side, away from the feeding hole (13), of the first supporting block (21), a sliding groove (31) is formed in the second supporting block (3), a sliding block (32) is connected to the sliding groove (31) in a sliding mode, and a lifting assembly (4) used for controlling the sliding block (32) to lift is arranged on the sliding block (32).

7. The reaction kettle for producing glue according to claim 6, characterized in that: the lifting assembly (4) comprises a gear (42) and a rack (41), the rack (41) is fixedly connected to the sliding block (32), and a connecting groove for the rack (41) to penetrate through is formed in the second supporting block (3); the gear (42) is meshed with the rack (41), a connecting rod (43) is fixedly connected to the axis of the gear (42), and a limiting device (5) for preventing the gear (42) from being disengaged from the rack (41) is arranged on the connecting rod (43).

8. The reaction kettle for producing glue according to claim 7, characterized in that: the limiting device (5) comprises a limiting block (51) and a clamping block (52), the limiting block (51) is fixedly connected to the second supporting block (3), a through hole (512) for a connecting rod (43) to pass through and a groove (511) for mounting a gear (42) are formed in the limiting block (51), and a clamping groove (513) coaxial with the through hole (512) is formed in the side wall of the through hole (512); the clamping block (52) is coaxially fixed on the connecting rod (43), and the clamping block (52) and the clamping groove (513) are clamped in the axial direction of the connecting rod (43) and are rotatably connected in the circumferential direction of the connecting rod (43); one end of the connecting rod (43) far away from the gear (42) is fixedly connected with an operating handle (431).