CN117802276A - Device for removing fur on animal skin by using high-pressure water - Google Patents

Abstract

The invention relates to the technical field of dehairing, and provides equipment for removing animal fur by using high-pressure water, which comprises a conveying and cleaning mechanism, two side pressing mechanisms, a high-pressure flushing mechanism and a main frame, wherein the conveying and cleaning mechanism comprises a motor, the motor is arranged on one side of the main frame, two symmetrically arranged rotating rollers are rotatably arranged in the main frame, one end of one rotating roller is connected with the output end of the motor through a coupling, and the motor is started when the equipment is used for removing the fur under high pressure through the arrangement of the motor, cleaning brushes and the like, so that a porous conveying belt conveys the animal fur, at the moment, the two cleaning brushes brush residual animal fur on the porous conveying belt, and a scraper plate completely cleans the animal fur on the porous conveying belt, so that the using cleanliness of the animal fur is improved.

Description

Device for removing fur on animal skin by using high-pressure water

Technical Field

The invention relates to the technical field of dehairing, in particular to equipment for removing fur on animal skin by using high-pressure water.

Background

At present, an animal dehairing machine refers to a machine device for removing hairs on animal skins, and is commonly used in industries such as meat processing, leather processing and the like.

The authorized bulletin number in the prior art is: CN117248081a, this patent relates to an animal fur dehairing equipment, specifically be animal fur processing apparatus field, this patent includes the casing, the scraper cylinder, fixed cylinder, blowing mechanism, drainage mechanism and slewing mechanism, the casing is erect on the horizontal plane, and be equipped with the rotation source, the scraper cylinder sets up inside the casing, its intermediate position rotates and is connected with the cylinder scraper, this scraper laminating inside wall, spiral scraper is fixed on the cylinder scraper lateral wall, fixed cylinder then rotates to be connected inside the casing, and laminating in the scraper cylinder below, blowing mechanism sets up in the scraper cylinder top, and drainage mechanism then sets up in the fixed cylinder below, slewing mechanism then is located on the casing lateral wall, this patent's advantage lies in, can not only effectively reduce the incomplete problem of fur removal in fur edge, can also wash the residual hair on fur surface.

However, this patent is the principle of shaving, and is inefficiency, and easy scratch animal skin, and during the unhairing period, there is residual animal hair in the equipment inside, leads to the use cleanliness of equipment lower, and this patent is when unhairing, when having the animal skin that is greater than entrance, is difficult to effectively unhairing, and the suitability is low.

The application publication number in the prior art is: the utility model provides an animal fur dehairing device of CN110735007A, this patent discloses an animal fur dehairing device, mainly include the organism, the support, fur fixed establishment and dehairing mechanism, the organism below is equipped with the support in order to support whole device, fur fixed establishment is located the inside top of organism, including rotary drum and fixture, the rotary drum is used for laying and rotating animal fur, fixture then fixes the fur tip, dehairing mechanism includes dehairing roller and dehairing device, set up in the rotary drum top, the device is applicable to animal fur dehairing, can wrap up the fur at the rotary drum surface and fix, scrape down the hair through rotating dehairing mechanism, realize quick, efficient animal dehairing.

However, this patent also has the problem of animal hair residue, resulting in low cleanliness and susceptibility to scratching of animal skin.

Disclosure of Invention

The invention provides equipment for removing fur on animal skin by using high-pressure water, which solves the problems of low cleanliness and applicability in the related technology.

The technical scheme of the invention is as follows: the utility model provides an utilize high-pressure water to get rid of equipment of animal skin hair on, includes transport cleaning mechanism, both sides hold-down mechanism, high-pressure flushing mechanism and main frame, transport cleaning mechanism includes the motor, the motor is installed in one side of main frame, the inside rotation of main frame is installed two symmetrical arrangement's live-rollers, one of them live-rollers's one end is connected at the output of motor through the shaft coupling, two live-rollers's outer peripheral face is installed porous conveyer belt jointly, the inside rotation of main frame is installed four symmetrical arrangement's first reciprocating screw, one of them live-rollers and one of them first reciprocating screw's outer peripheral face is installed driving belt jointly, wherein two on the outer peripheral face of first reciprocating screw is installed conveyer belt jointly, four on the outer peripheral face of first reciprocating screw is installed meshing gear jointly, every two meshing gear mesh mutually, the activity cover is equipped with the scraper blade on the outer peripheral face of first reciprocating screw, the inside fixedly connected with four symmetrical arrangement's gag lever post;

the inside rotation of main frame holds that there are two symmetrical arrangement's second reciprocating screw, one of them the live-rollers with install the linkage belt jointly on the outer peripheral face of one of them second reciprocating screw, two install the rotation gear jointly on the outer peripheral face of second reciprocating screw, two the rotation gear meshes mutually, the inside fixedly connected with of main frame two symmetrical arrangement's locating lever, the activity cover is equipped with the brush cleaner on the outer peripheral face of second reciprocating screw.

Preferably, the two-side pressing mechanism comprises two supporting seats, the two supporting seats are fixedly connected to one side of the main frame through screws, two symmetrically arranged stretching shafts are fixedly connected to the inside of the supporting seats, a threaded rod is installed on internal threads of the supporting seats, one end of the threaded rod is fixedly connected with a rotary table, two ends of the stretching shafts are fixedly connected with a fixed block in common, one end of the threaded rod is rotatably installed inside the fixed block, an electric cylinder is installed at the bottom of the fixed block, a fixed frame is fixedly connected to the output end of the electric cylinder through screws, an auxiliary conveying belt is installed in the internal rotation of the fixed frame, and a rotating motor is installed on one side of the fixed frame.

Preferably, the high-pressure flushing mechanism comprises a hydraulic cylinder, the hydraulic cylinder is installed on one side of the main frame, a sliding shaft is installed at the output end of the hydraulic cylinder, an internal thread limiting block is fixedly connected to the bottom of the sliding shaft through a screw, a rotating screw is pressed by internal threads of the internal thread limiting block, a sliding frame body is movably sleeved on the peripheral surface of the rotating screw, a rotating motor is installed on one side of the sliding frame body, one end of the rotating screw is connected to the output end of the rotating motor through a coupling, a connecting frame is fixedly connected to the bottom of the sliding frame body through a screw, a pneumatic rotating motor and a hydraulic rotating joint are respectively installed at the top of the connecting frame, a high-pressure water pipeline is fixedly connected to one end of the hydraulic rotating joint, and a rotating nozzle is installed at the bottom of the hydraulic rotating joint.

Preferably, the inside of main frame has been seted up two symmetrical arrangement's hole groove, two the live-action roller is rotated respectively and is installed two the inside in hole groove, four symmetrical arrangement's round hole has been seted up to the inside of main frame, four the rotation of first reciprocating screw is installed respectively four the inside in round hole, the hole groove is used for the rotation of live-action roller.

Preferably, the inside of scraper blade has been seted up logical groove, the gag lever post passes the inside of logical groove, the through-hole has been seted up to the inside of brush cleaner, the locating lever passes the inside of through-hole, logical groove is used for the gag lever post to fix a position for the scraper blade.

Preferably, the inside of supporting seat has seted up first thread groove, threaded rod threaded connection is in the inside of first thread groove, the rotation groove has been seted up to the inside of fixed block, the threaded rod rotates and installs the inside of rotation groove, first thread groove is used for the rotation of threaded rod.

Preferably, the inside of fixed frame has seted up long groove, auxiliary conveyor belt rotates and installs long groove's inside, long groove is used for auxiliary conveyor belt's rotation.

Preferably, the inside of sliding frame body is seted up flutedly, internal thread stopper sliding connection is in the inside of recess, the second thread groove has been seted up to the inside of internal thread stopper, rotatory screw rod threaded connection is in the inside of second thread groove, and the recess is used for the slip of internal thread stopper.

The working principle and the beneficial effects of the invention are as follows:

1. according to the invention, through the arrangement of the motor, the cleaning brushes and other structures, when the equipment carries out high-pressure unhairing, the motor is started, so that the porous conveyer belt conveys animal skins, at the moment, the two cleaning brushes brush residual animal hairs on the porous conveyer belt, and the scraping plate completely removes the animal hairs on the porous conveyer belt, so that the using cleanliness of the animal hairs is improved.

2. According to the invention, through the arrangement of the structures such as the rotary table and the threaded rod, when the fixed frame needs to be adjusted, the threaded rod is rotated, the threaded rod rotates to enable the fixed block to slide, the position of the fixed frame is adjusted, the electric cylinder is started to adjust the height of the fixed frame, so that the compacting range is adjusted, and the animal skin adjusting device is suitable for animal skins with different sizes.

3. According to the invention, through the arrangement of structures such as the hydraulic cylinder, the rotary spray head and the like, the hydraulic cylinder is started to adjust the height of the rotary spray head, the transverse cleaning range is controlled by starting the rotary motor, high-pressure water is conveyed into the hydraulic rotary joint through the high-pressure water pipeline, and the pneumatic rotary motor drives the hydraulic rotary joint and the rotary spray head to rotate so as to repeatedly wash animal skin.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the overall structure of the conveying and cleaning mechanism of the invention;

FIG. 3 is a schematic view of the internal transmission structure of the conveying and cleaning mechanism of the invention;

fig. 4 is an enlarged view of the present invention at reference a in fig. 3;

FIG. 5 is a schematic diagram of the overall structure of the two-sided pressing mechanism of the present invention;

fig. 6 is a schematic view of the overall structure of the high-pressure flushing mechanism of the present invention.

In the figure: 1. conveying and cleaning mechanisms; 11. a main frame; 12. a motor; 121. a rotating roller; 122. a porous conveyor belt; 123. a drive belt; 13. a first reciprocating screw rod; 131. a meshing gear; 132. a conveyor belt; 133. a scraper; 134. a limit rod; 14. a second reciprocating screw rod; 141. a linkage belt; 142. rotating the gear; 145. a cleaning brush; 144. a positioning rod;

2. two sides compressing mechanism; 21. a support base; 22. stretching a shaft; 23. a threaded rod; 231. a turntable; 232. a fixed block; 24. an electric cylinder; 241. a fixed frame; 25. a rotating motor; 251. an auxiliary conveyor belt;

3. a high pressure flushing mechanism; 30. a hydraulic cylinder; 31. a sliding shaft; 311. an internal thread limiting block; 32. a sliding frame; 321. a rotating electric machine; 322. rotating the screw; 330. a connection frame; 33. a pneumatic rotary motor; 34. a hydraulic swivel joint; 35. rotating the spray head; 36. high pressure water pipeline.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1 to 6, the present embodiment proposes an apparatus for removing hair from animal skin using high pressure water, comprising a conveying and cleaning mechanism 1, a two-side pressing mechanism 2, a high pressure flushing mechanism 3, and a main frame 11, the conveying and cleaning mechanism 1 comprising a motor 12, the motor 12 being mounted on one side of the main frame 11, two symmetrically arranged rotating rollers 121 being rotatably mounted inside the main frame 11, one end of one rotating roller 121 being coupled to an output end of the motor 12 through a coupling, porous conveyor belts 122 being commonly mounted on outer peripheral surfaces of the two rotating rollers 121, four symmetrically arranged first reciprocating screw rods 13 being rotatably mounted inside the main frame 11, a transmission belt 123 being commonly mounted on an outer peripheral surface of one of the rotating rollers 121 and one of the first reciprocating screw rods 13, a conveyor belt 132 being commonly mounted on an outer peripheral surface of the two first reciprocating screw rods 13, the outer peripheral surfaces of the four first reciprocating screw rods 13 are jointly provided with meshing gears 131, every two meshing gears 131 are meshed, the outer peripheral surfaces of the first reciprocating screw rods 13 are movably sleeved with scraping plates 133, the inside of the main frame 11 is fixedly connected with four symmetrically arranged limiting rods 134, the inside of the main frame 11 rotates and presses the second reciprocating screw rod 14 with two symmetrical arrangements, one rotating roller 121 and the outer peripheral surface of one second reciprocating screw rod 14 are jointly provided with a linkage belt 141, the outer peripheral surfaces of the two second reciprocating screw rods 14 are jointly provided with rotating gears 142, the two rotating gears 142 are meshed, the inside of the main frame 11 is fixedly connected with two symmetrically arranged positioning rods 144, the outer peripheral surfaces of the second reciprocating screw rods 14 are movably sleeved with cleaning brushes 145, and when the equipment carries out high-pressure dehairing through the arrangement of the motor 12, the cleaning brushes 145 and the like, the motor 12 is started to enable the porous conveyer belt 122 to convey the animal skin, at this time, the two cleaning brushes 145 brush the residual animal hair on the porous conveyer belt 122, and the scraping plate 133 completely removes the animal hair on the porous conveyer belt 122, so that the cleanliness of the animal skin is improved.

As shown in fig. 1 to 4, two symmetrically arranged hole slots are formed in the main frame 11, two rotating rollers 121 are respectively rotatably mounted in the two hole slots, four symmetrically arranged round holes are formed in the main frame 11, and four first reciprocating screw rods 13 are rotatably mounted in the four round holes.

As shown in fig. 1 to 3, the scraper 133 has a through groove formed therein, the stopper rod 134 passes through the through groove, the cleaning brush 145 has a through hole formed therein, and the positioning rod 144 passes through the through hole.

In this embodiment, when the animal skin needs to be dehaired under high pressure, the motor 12 is turned on, the motor 12 rotates to drive a rotating roller 121, the rotating roller 121 drives a porous conveyor belt 122 to convey the animal skin, the rotating roller 121 drives a first reciprocating screw 13 to rotate through a transmission belt 123, the first reciprocating screw 13 rotates through the arrangement of a meshing gear 131 and the transmission belt 123, a scraper 133 slides back and forth on the porous conveyor belt 122 when the first reciprocating screw 13 rotates, a limiting rod 134 is arranged in the scraper 133 to limit the porous conveyor belt 122, at the same time, another rotating roller 121 drives a second reciprocating screw 14 through the transmission belt 132, and when the second reciprocating screw 14 rotates, the second reciprocating screw 15 drives another second reciprocating screw 122 to rotate through the meshing of the rotating gear 142, a sweeping brush 145 performs preliminary cleaning on the porous conveyor belt 122, and a positioning rod 144 passes through the interior of the sweeping brush 145 to limit the movement of the sweeping brush 145, so that the cleaning degree of the sweeping brush 145 is improved.

Example 2

As shown in fig. 1 to 5, based on the same concept as that of the above embodiment 1, the present embodiment further proposes that the two-side pressing mechanism 2 includes two supporting seats 21, the two supporting seats 21 are fixedly connected to one side of the main frame 11 through screws, two symmetrically arranged stretching shafts 22 are fixedly connected to one side of the supporting seats 21, a threaded rod 23 is installed in the internal threads of the supporting seats 21, a turntable 231 is fixedly connected to one end of the threaded rod 23, a fixed block 232 is fixedly connected to one end of the two stretching shafts 22 together, one end of the threaded rod 23 is rotatably installed in the fixed block 232, an electric cylinder 24 is installed at the bottom of the fixed block 232, an output end of the electric cylinder 24 is fixedly connected with a fixed frame 241 through screws, an auxiliary conveying belt 251 is rotatably installed in the fixed frame 241, a rotating motor 25 is installed on one side of the fixed frame 241, and through the arrangement of the structures such as the turntable 231 and the threaded rod 23, when the fixed frame 241 needs to be adjusted, the threaded rod 23 rotates to enable the fixed block 232 to slide, the position of the fixed frame 241 is adjusted, the height of the fixed frame 241 can be adjusted by turning on the electric cylinder 24, and the electric cylinder 241 is adjusted to press the height of the fixed frame 241, so as to adapt to different animal sizes.

As shown in fig. 5, the support seat 21 has a first thread groove formed therein, the threaded rod 23 is screwed into the first thread groove, the fixed block 232 has a rotation groove formed therein, and the threaded rod 23 is rotatably mounted in the rotation groove.

As shown in fig. 5, an elongated groove is formed in the fixing frame 241, and the auxiliary conveying belt 251 is rotatably installed in the elongated groove.

In this embodiment, the rotating motor 25 is turned on, the auxiliary conveying belt 251 is driven to rotate when the rotating motor 25 rotates, the rotary table 231 can be rotated before the animal skin is conveyed by the porous conveying belt 122, the rotary table 231 rotates to drive the threaded rod 23 to rotate, the threaded rod 23 moves in the supporting seat 21 to drive the fixing block 232 to slide back and forth, the position of the fixing frame 241 is adjusted, the electric cylinder 24 is turned on, and the electric cylinder 24 is started to adjust the height of the fixing frame 241 so as to adapt to animal skins with different sizes.

Example 3

As shown in fig. 1 to 6, based on the same concept as that of the above embodiment 1 and embodiment 2, this embodiment further adds a structure that the high-pressure flushing mechanism 3 includes a hydraulic cylinder 30, the hydraulic cylinder 30 is installed at one side of the main frame 11, a sliding shaft 31 is installed at an output end of the hydraulic cylinder 30, a sliding nozzle 35 is installed at a bottom of the sliding shaft 31 through a screw fixedly connected with an internal thread stopper 311, a rotating screw 322 is pressed by an internal thread of the internal thread stopper 311, a sliding frame 32 is movably sleeved on an outer circumferential surface of the rotating screw 322, a rotating motor 321 is installed at one side of the sliding frame 32, one end of the rotating screw 322 is connected to an output end of the rotating motor 321 through a coupling, a connection frame 330 is fixedly connected to a bottom of the sliding frame 32 through a screw, a pneumatic rotating motor 33 and a hydraulic rotating joint 34 are installed at a top of the connection frame 330, a high-pressure water pipe 36 is fixedly connected to one end of the hydraulic rotating joint 34, a rotating nozzle 35 is installed at a bottom of the hydraulic rotating joint 34, a height of the rotating nozzle 35 is adjusted by the arrangement of the hydraulic cylinder 30, the rotating nozzle 35 and the like, the rotating cylinder 30 is started to control the rotating motor 321 to open the rotating motor to control a range to drive the hydraulic motor to rotate the hydraulic motor 34 repeatedly to flush the hydraulic motor 33 through the high-pressure pipe 34.

As shown in fig. 6, a groove is formed in the sliding frame 32, the internal thread stopper 311 is slidably connected to the inside of the groove, a second thread groove is formed in the inside of the internal thread stopper 311, and the rotary screw 322 is screwed to the inside of the second thread groove.

In this embodiment, when cleaning, the hydraulic cylinder 30 may be turned on, the hydraulic cylinder 30 is started to enable the sliding shaft 31 to move, the sliding frame 32 is pressed down when the sliding shaft 31 moves, the height of the rotary spray head 35 is adjusted, the pneumatic rotary motor 33 on the connecting frame 330 is pneumatically connected with the inside of the hydraulic rotary joint 34, the pneumatic rotary motor 33 is started to enable the hydraulic rotary joint 34 to rotate, the rotary spray head 35 is enabled to perform rotary flushing, the rotary motor 321 may be turned on when the rotary spray head 35 performs flushing, the rotary screw 322 is driven to rotate when the rotary motor 321 rotates, the transverse position of the rotary spray head 35 is adjusted when the rotary screw 322 rotates, animal skin is repeatedly flushed, and flushing efficiency is improved.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (8)

1. The equipment for removing fur on animal skin by utilizing high-pressure water is characterized by comprising a conveying cleaning mechanism (1), two side pressing mechanisms (2), a high-pressure flushing mechanism (3) and a main frame (11), wherein the conveying cleaning mechanism (1) comprises a motor (12), the motor (12) is arranged on one side of the main frame (11), two symmetrically arranged rotating rollers (121) are arranged on the inner periphery of the main frame (11) in a rotating way, one end of one rotating roller (121) is connected with the output end of the motor (12) through a coupling, a porous conveying belt (122) is jointly arranged on the outer periphery of the two rotating rollers (121), four symmetrically arranged first reciprocating screw rods (13) are jointly arranged on the inner periphery of the main frame (11) in a rotating way, a transmission belt (123) is jointly arranged on the outer periphery of one of the rotating rollers (121) and one of the first reciprocating screw rods (13), a transmission belt (132) is jointly arranged on the outer periphery of the two first reciprocating screw rods (13), a plurality of gears (131) are jointly arranged on the outer periphery of the four first reciprocating screw rods (13) and meshed with one reciprocating screw rod (133), four limit rods (134) which are symmetrically arranged are fixedly connected inside the main frame (11);

the inside rotation of main frame (11) is pressed that there are two symmetrical arrangement's second reciprocating screw (14), one of them rotating roller (121) and one of them install linkage belt (141) jointly on the outer peripheral face of second reciprocating screw (14), two install rotation gear (142) jointly on the outer peripheral face of second reciprocating screw (14), two rotation gear (142) mesh mutually, the inside fixedly connected with of main frame (11) two symmetrical arrangement's locating lever (144), the movable sleeve is equipped with cleaning brush (145) on the outer peripheral face of second reciprocating screw (14).

2. The device for removing fur from animal skin by using high-pressure water according to claim 1, wherein the two-side pressing mechanism (2) comprises two supporting seats (21), the two supporting seats (21) are fixedly connected to one side of the main frame (11) through screws, two symmetrically arranged stretching shafts (22) are fixedly connected to the inside of the supporting seats (21), a threaded rod (23) is installed on the internal threads of the supporting seats (21), a turntable (231) is fixedly connected to one end of the threaded rod (23), a fixed block (232) is fixedly connected to one end of each of the two stretching shafts (22), one end of the threaded rod (23) is rotatably installed inside the fixed block (232), an electric cylinder (24) is installed at the bottom of each fixed block (232), a fixed frame (241) is fixedly connected to the output end of each electric cylinder (24) through screws, an auxiliary conveying belt (251) is rotatably installed inside each fixed frame (241), and a rotating motor (25) is installed on one side of each fixed frame (241).

3. The equipment for removing fur from animal skin by utilizing high-pressure water according to claim 1, characterized in that the high-pressure flushing mechanism (3) comprises a hydraulic cylinder (30), the hydraulic cylinder (30) is installed on one side of the main frame (11), a sliding shaft (31) is installed at the output end of the hydraulic cylinder (30), an internal thread limiting block (311) is fixedly connected to the bottom of the sliding shaft (31) through a screw, a rotary screw (322) is pressed by the internal thread of the internal thread limiting block (311), a sliding frame (32) is movably sleeved on the outer circumferential surface of the rotary screw (322), a rotary motor (321) is installed on one side of the sliding frame (32), one end of the rotary screw (322) is connected to the output end of the rotary motor (321) through a coupler, a connecting frame (330) is fixedly connected to the bottom of the sliding frame (32) through a screw, a pneumatic rotary motor (33) and a hydraulic rotary joint (34) are respectively installed at the top of the connecting frame (330), a rotary joint (36) is fixedly connected to one end of the hydraulic rotary joint (34), and a hydraulic hose (35) is installed at the bottom of the rotary joint.

4. The equipment for removing fur from animal skin by using high-pressure water according to claim 1, wherein two symmetrically arranged hole grooves are formed in the main frame (11), two rotating rollers (121) are respectively rotatably mounted in the two hole grooves, four symmetrically arranged round holes are formed in the main frame (11), and four first reciprocating screw rods (13) are respectively rotatably mounted in the four round holes.

5. The apparatus for removing hair from animal skin using high pressure water according to claim 1, wherein the scraper (133) has a through groove formed therein, the stopper rod (134) passes through the inside of the through groove, the cleaning brush (145) has a through hole formed therein, and the positioning rod (144) passes through the inside of the through hole.

6. The equipment for removing fur from animal skin by utilizing high-pressure water according to claim 2, wherein the support seat (21) is internally provided with a first thread groove, the threaded rod (23) is in threaded connection with the inside of the first thread groove, the inside of the fixed block (232) is provided with a rotating groove, and the threaded rod (23) is rotatably arranged in the rotating groove.

7. The apparatus for removing fur from animal skin using high pressure water according to claim 2, wherein the fixing frame (241) is provided with an elongated groove inside, and the auxiliary conveyor belt (251) is rotatably installed inside the elongated groove.

8. A device for removing hair from animal skin by using high-pressure water according to claim 3, wherein the sliding frame (32) is provided with a groove inside, the internal thread stopper (311) is slidably connected to the inside of the groove, the internal thread stopper (311) is provided with a second thread groove inside, and the rotary screw (322) is screwed to the inside of the second thread groove.