Enzymolysis device for collagen extraction

Abstract

The invention relates to the technical field of collagen extraction, and discloses an enzymolysis device for collagen extraction, which comprises a heating assembly, the heating assembly comprises a placing tank, a bottom support seat is fixedly mounted in the placing tank, a control module is fixedly mounted on the outer surface of the placing tank, and the control module is connected with the heating assembly. And the top of the control module is electrically connected with a heating pipe. Raw materials and enzymatic hydrolysate are mixed and stirred through rotation of an auxiliary rotating roller and stirring paddles on the surface of a mounting cylinder, and along with rotation of the mounting cylinder, a first adjusting gear can do circular motion with a driving gear as the circle center under limiting of a first limiting groove and a first gear ring due to meshing of the first adjusting gear and the driving gear, so that the enzymatic hydrolysate is mixed and stirred; the inner wall of the enzymolysis tank is scraped by the first scraping plate mounted by the first mounting rod, so that raw materials can be prevented from being adhered to the inner wall of the enzymolysis tank when being stirred by the stirring paddle while the inner wall is ensured to be clean and tidy, all the raw materials can be ensured to fully participate in enzymolysis reaction, and the utilization rate of the raw materials and the complete degree of enzymolysis are improved.

Description

Technical Field

[0001] The invention relates to the technical field of collagen extraction, and in particular to an enzymatic hydrolysis device for collagen extraction. Background Art

[0002] Collagen is an important component of the extracellular matrix. Collagen extracted from animal tissues has a wide range of uses in the fields of medicine, food, feed and cosmetics. Enzymatic hydrolysis is an effective way to extract collagen. During extraction, the corresponding enzyme is added to the enzymatic hydrolysis device to effectively extract the collagen through the decomposition of the enzyme.

[0003] However, in actual use, the enzymatic hydrolysis device still has many defects. For example, the existing enzymatic hydrolysis device may have the problem of raw materials adhering to the inner wall of the tank, resulting in the raw materials not being able to fully participate in the enzymatic hydrolysis reaction, reducing the raw material utilization rate. At the same time, during the enzymatic hydrolysis process, impurities are easily left on the inner wall of the tank, making cleaning more difficult. Therefore, it is necessary to design an enzymatic hydrolysis device for collagen extraction. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an enzymatic hydrolysis device for collagen extraction.

[0005] The present invention is implemented by the following technical scheme: an enzymatic hydrolysis device for collagen extraction, comprising a heating component, the heating component comprising a placement tank, a bottom support seat is fixedly installed inside the placement tank, a control module is fixedly installed on the outer surface of the placement tank, a heating pipe is electrically connected to the top of the control module, and the heating pipe is fixedly installed inside the placement tank through a pipe fixing seat, and further comprising:

[0006] An enzymolysis component, the enzymolysis component comprising an enzymolysis tank, a feed pipe is fixedly installed on one side of the top of the enzymolysis tank, and an enzyme injection pipe is fixedly installed on one side of the top of the enzymolysis tank away from the feed pipe;

[0007] A stirring assembly, the stirring assembly comprising a driving motor, and a main rotating roller is fixedly mounted on the output end of the driving motor;

[0008] A main cleaning component, the main cleaning component comprising an auxiliary rotating roller, a mounting cylinder is fixedly mounted on one side of the auxiliary rotating roller, and a stirring paddle is fixedly mounted on the outer surface of the mounting cylinder;

[0009] The auxiliary cleaning component comprises a second sealing cover, and a second limiting groove is formed inside the second sealing cover.

[0010] As a further improvement of the above scheme, a first sealing cover is fixedly installed on one side of the enzymatic hydrolysis tank, a first limiting groove is opened inside the first sealing cover, a motor fixing seat is fixedly installed on the top of the first sealing cover, and a driving motor is fixedly installed inside the motor fixing seat.

[0011] Through the above technical solution, the first sealing cover helps to maintain the sealing inside the enzymolysis tank, prevent the leakage of the enzymolysis solution and the entry of external impurities during the enzymolysis process, thereby ensuring the purity and stability of the enzymolysis reaction. At the same time, the drive motor is installed on the top of the first sealing cover to ensure that when the enzymolysis tank is placed in the placement tank, water will not enter the drive motor.

[0012] As a further improvement of the above scheme, a main rotating roller is fixedly installed on the output end of the driving motor, and a transmission belt is sleeved on the outer surface of the main rotating roller. The end of the transmission belt away from the main rotating roller is sleeved on the outer surface of the connecting roller, and the connecting roller is rotatably installed on the outer surface of the first sealing cover, and a chain is sleeved on the outer surface of the connecting roller.

[0013] Through the above technical solution, the transmission belt is connected to the connecting roller, and the use of the transmission belt realizes the effective transmission of power. This transmission method has a certain flexibility and can buffer and adapt to the relative position changes between different components to a certain extent, ensuring that power is stably transmitted from the drive motor to the connecting roller, providing a stable power source for subsequent stirring and cleaning actions.

[0014] As a further improvement of the above scheme, one end of the chain away from the connecting roller is sleeved on the outer surface of the auxiliary rotating roller, the outer surface of the auxiliary rotating roller is provided with a rack meshing with the chain, the auxiliary rotating roller is rotatably installed inside the first sealing cover, and a mounting cylinder is fixedly installed on one side of the auxiliary rotating roller.

[0015] Through the above technical scheme, the transmission method through the chain ensures the accuracy of power transmission, and the meshing structure between the chain and the rack on the outer surface of the auxiliary rotating roller can effectively convert power into the rotational power of the auxiliary rotating roller, providing stable rotational power for the mounting cylinder and the stirring paddle thereon, ensuring the smooth progress of the stirring action.

[0016] As a further improvement of the above solution, driving gears are fixedly mounted on both sides of the outer surface of the mounting cylinder, a first gear ring is fixedly mounted on the inner wall of the first sealing cover, and a first adjusting gear is rotatably mounted inside the first gear ring.

[0017] As a further improvement of the above solution, the first adjusting gear is meshed with the first gear ring, the first adjusting gear is meshed with the driving gear, and a first limiting rod is fixedly mounted on one side of the first adjusting gear.

[0018] Through the above technical solution, this stable meshing structure can reduce energy loss and vibration during power transmission, so that each component can move accurately according to design requirements, thereby improving the working reliability of the entire device.

[0019] As a further improvement of the above solution, the first limiting rod is slidably installed inside the first limiting groove, a first mounting rod is fixedly installed on the side of the first adjusting gear away from the first limiting rod, and a first scraper is fixedly installed on the outer surface of the first mounting rod.

[0020] Through the above technical solution, the first limiting groove limits the first limiting rod, which can ensure that the first adjusting gear performs circular motion according to a predetermined trajectory, thereby ensuring that the first scraper can accurately scrape the inner wall of the enzymatic hydrolysis tank and improve the cleaning effect.

[0021] As a further improvement of the above scheme, a second sealing cover is fixedly installed on the side of the enzymolysis tank away from the first sealing cover, a second gear ring is fixedly installed on the inner wall of the second sealing cover, a second adjusting gear is rotatably installed inside the second gear ring, and the second adjusting gear is meshed with the second gear ring.

[0022] As a further improvement of the above scheme, a second limiting rod is fixedly installed on one side of the second adjusting gear, the second limiting rod is slidably installed inside the second limiting groove, a second mounting rod is fixedly installed on the side of the second adjusting gear away from the second limiting rod, and the outer surface of the second mounting rod is fixedly installed.

[0023] Through the above technical solution, the second scraper and the first scraper clean the inner wall of the enzymolysis tank from both sides respectively. The synergy of the double-sided cleaning can ensure that all parts of the inner wall of the enzymolysis tank can be effectively cleaned, avoiding the cleaning dead corners that may exist due to unilateral cleaning, and further improving the cleaning effect and the quality of the enzymolysis reaction.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention installs the first sealing cover and the auxiliary cleaning component on both sides of the enzymolysis component, places the enzymolysis tank in the placement tank, and uses the bottom support seat to support the enzymolysis tank to ensure the stability of the enzymolysis component, and pours water into the placement tank. It is specially explained that the control module is composed of a control switch and a power supply module. After the control module is connected to the power supply, the operator adjusts the control switch to realize the conduction or disconnection of the heating tube circuit, and uses the internal power supply module to process and convert the input electrical energy to provide the required voltage and current for the heating tube. Since the heating tube contains a resistance wire, when the current passes through the resistance wire, the existence of the resistance will generate a Joule heating effect, so that the temperature of the heating tube increases, thereby heating the water source inside the placement tank, and the pipe fixing seat can be used to support and fix the heating tube, ensuring that temperature control can be provided when the raw material is enzymolyzed, and ensuring that the required temperature is reached during the enzymolysis process.

[0026] The present invention drives the main rotating roller to rotate by driving the driving motor, and drives the connecting roller to rotate by connecting with the transmission belt. As the connecting roller rotates, the auxiliary rotating roller is rotated by the chain. The transmission belt and the chain can ensure that when the enzymolysis tank is placed in the enzymolysis tank, the driving motor will not be in the water source. As the auxiliary rotating roller rotates, the stirring paddle on the surface of the mounting cylinder mixes and stirs the raw material and the enzymolysis liquid. As the mounting cylinder rotates, the first adjusting gear meshes with the driving gear and moves in a circle with the driving gear as the center under the limitation of the first limiting groove and the first gear ring. The first scraper installed by the first mounting rod scrapes the inner wall of the enzymolysis tank, ensuring that the inner wall is clean and tidy and preventing the raw material from adhering to the inner wall of the enzymolysis tank when the stirring paddle is stirring, ensuring that all the raw materials can fully participate in the enzymolysis reaction, and improving the utilization rate of the raw materials and the completeness of the enzymolysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the heating component of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the enzymatic hydrolysis component of the present invention;

[0030] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0031] Figure 5 This is a schematic diagram of the structure of the stirring assembly of the present invention;

[0032] Figure 6 This is a schematic diagram of the overall auxiliary cleaning component structure of the present invention;

[0033] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B in the middle.

[0034] Description of main symbols:

[0035] 1. Heating assembly; 101. Placement tank; 102. Bottom support seat; 103. Control module; 104. Heating tube; 105. Pipe fixing seat; 2. Enzyme hydrolysis assembly; 201. Enzyme hydrolysis tank; 202. Feeding tube; 203. Enzyme injection tube; 204. First sealing cover; 205. First limiting groove; 206. Motor fixing seat; 3. Stirring assembly; 301. Driving motor; 302. Main rotating roller; 303. Transmission belt; 304. Connecting roller; 305. Chain; 4. Main cleaning Component; 401, auxiliary rotating roller; 402, mounting cylinder; 403, stirring paddle; 404, driving gear; 405, first gear ring; 406, first adjusting gear; 407, first limiting rod; 408, first mounting rod; 409, first scraper; 5, auxiliary cleaning component; 501, second sealing cover; 502, second limiting groove; 503, second gear ring; 504, second adjusting gear; 505, second limiting rod; 506, second mounting rod; 507, second scraper. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0037] Example:

[0038] Please combine Figure 1-7 The enzymatic hydrolysis device for collagen extraction of the present embodiment includes a heating component 1, the heating component 1 includes a placement tank 101, a bottom support seat 102 is fixedly installed inside the placement tank 101, a control module 103 is fixedly installed on the outer surface of the placement tank 101, a heating pipe 104 is electrically connected to the top of the control module 103, and the heating pipe 104 is fixedly installed inside the placement tank 101 through a pipe fixing seat 105, and also includes:

[0039] The enzymolysis component 2 includes an enzymolysis tank 201, a feed pipe 202 is fixedly installed on one side of the top of the enzymolysis tank 201, and an enzyme injection pipe 203 is fixedly installed on one side of the top of the enzymolysis tank 201 away from the feed pipe 202;

[0040] A stirring assembly 3, the stirring assembly 3 comprises a driving motor 301, and a main rotating roller 302 is fixedly mounted on the output end of the driving motor 301;

[0041] The main cleaning component 4 includes an auxiliary rotating roller 401, a mounting cylinder 402 is fixedly mounted on one side of the auxiliary rotating roller 401, and a stirring paddle 403 is fixedly mounted on the outer surface of the mounting cylinder 402;

[0042] The auxiliary cleaning component 5 includes a second sealing cover 501 , and a second limiting groove 502 is formed inside the second sealing cover 501 .

[0043] A first sealing cover 204 is fixedly installed on one side of the enzymolysis tank 201 , a first limiting groove 205 is opened inside the first sealing cover 204 , a motor fixing seat 206 is fixedly installed on the top of the first sealing cover 204 , and a driving motor 301 is fixedly installed inside the motor fixing seat 206 .

[0044] A main rotating roller 302 is fixedly installed at the output end of the driving motor 301, and a transmission belt 303 is sleeved on the outer surface of the main rotating roller 302. The end of the transmission belt 303 away from the main rotating roller 302 is sleeved on the outer surface of the connecting roller 304. The connecting roller 304 is rotatably installed on the outer surface of the first sealing cover 204, and a chain 305 is sleeved on the outer surface of the connecting roller 304.

[0045] The main rotating roller 302 is driven to rotate by the driving motor 301, and the connecting roller 304 is driven to rotate by the connection of the transmission belt 303. As the connecting roller 304 rotates, the auxiliary rotating roller 401 is rotated by the chain 305. The transmission belt 303 and the chain 305 can ensure that when the enzymolysis tank 201 is placed in the enzymolysis tank 201, the driving motor 301 will not be in the water source, and the motor fixing seat 206 can ensure the installation of the driving motor 301.

[0046] One end of the chain 305 away from the connecting roller 304 is sleeved on the outer surface of the auxiliary rotating roller 401. The outer surface of the auxiliary rotating roller 401 is provided with a rack meshing with the chain 305. The auxiliary rotating roller 401 is rotatably installed inside the first sealing cover 204, and a mounting tube 402 is fixedly installed on one side of the auxiliary rotating roller 401.

[0047] As the auxiliary rotating roller 401 rotates, the stirring paddle 403 installed on the surface of the cylinder 402 mixes and stirs the raw materials and the enzymatic hydrolyzate.

[0048] Driving gears 404 are fixedly mounted on both sides of the outer surface of the mounting cylinder 402 , a first gear ring 405 is fixedly mounted on the inner wall of the first sealing cover 204 , and a first adjusting gear 406 is rotatably mounted inside the first gear ring 405 .

[0049] The first adjusting gear 406 is meshed with the first gear ring 405 , and the first adjusting gear 406 is meshed with the driving gear 404 . A first limiting rod 407 is fixedly mounted on one side of the first adjusting gear 406 .

[0050] The first limiting rod 407 is slidably installed inside the first limiting groove 205 , a first mounting rod 408 is fixedly installed on one side of the first adjusting gear 406 away from the first limiting rod 407 , and a first scraper 409 is fixedly installed on the outer surface of the first mounting rod 408 .

[0051] As the mounting tube 402 rotates, the first adjusting gear 406 meshes with the driving gear 404, and the first limiting rod 407 is slidably installed inside the first limiting groove 205. The first adjusting gear 406 will move in a circle with the driving gear 404 as the center under the limitation of the first limiting groove 205 and the first gear ring 405, and the first scraper 409 installed by the first mounting rod 408 will scrape the inner wall of the enzymatic hydrolysis tank 201.

[0052] A second sealing cover 501 is fixedly installed on one side of the enzymolysis tank 201 away from the first sealing cover 204. A second gear ring 503 is fixedly installed on the inner wall of the second sealing cover 501. A second adjusting gear 504 is rotatably installed inside the second gear ring 503. The second adjusting gear 504 is meshed with the second gear ring 503.

[0053] A second limiting rod 505 is fixedly installed on one side of the second adjusting gear 504, and the second limiting rod 505 is slidably installed inside the second limiting groove 502. A second mounting rod 506 is fixedly installed on the side of the second adjusting gear 504 away from the second limiting rod 505, and 507 is fixedly installed on the outer surface of the second mounting rod 506.

[0054] At the same time, when the mounting cylinder 402 rotates, the second adjusting gear 504 is also in a state of meshing with the driving gear 404, and since the second limiting rod 505 is slidably installed in the second limiting groove 502, under the limitation of the second gear ring 503, the second scraper 507 on the surface of the second mounting rod 506 will make a circular motion opposite to the first scraper 409 with the mounting cylinder 402 as the center.

[0055] The implementation principle of an enzymatic hydrolysis device for collagen extraction in the embodiment of the present application is as follows: by installing the first sealing cover 204 and the second sealing cover 501 on both sides of the enzymatic hydrolysis component 2, the enzymatic hydrolysis tank 201 is placed in the placement tank 101, and the bottom support seat 102 provided in the heating component 1 can be used to support the enzymatic hydrolysis tank 201 to ensure the stability of the enzymatic hydrolysis component 2, and water is poured into the placement tank 101. It is specially explained that the control module 103 is composed of a control switch and a power supply module. After the control module 103 is connected to the power supply, the operator adjusts the control switch to realize the conduction or disconnection of the heating tube 104 circuit;

[0056] The power module inside the control module 103 is used to process and convert the input electric energy to provide the required voltage and current for the heating tube 104. Since the heating tube 104 contains a resistance wire inside, when the current passes through the resistance wire, the existence of the resistance will produce a Joule heat effect, so that the temperature of the heating tube 104 increases, thereby heating the water source inside the placement tank 101, and the pipe fixing seat 105 can be used to support and fix the heating tube 104, so as to ensure that temperature control can be provided when the raw material is enzymolyzed, and the required temperature is reached during the enzymolysis process;

[0057] The raw material containing collagen is added into the enzymolysis tank 201 through the feed pipe 202, and then an appropriate amount of enzyme solution is added through the enzyme injection tube 203. The main rotating roller 302 is driven to rotate by the drive motor 301, and the connection of the transmission belt 303 is used to drive the connecting roller 304 to rotate. As the connecting roller 304 rotates, the auxiliary rotating roller 401 is rotated by the chain 305. The transmission belt 303 and the chain 305 can ensure that when the enzymolysis tank 201 is placed in the enzymolysis tank 201, the driving motor 301 will not be in the water source, and the motor fixing seat 206 can ensure the installation of the driving motor 301 and ensure the stability of the stirring component 3 during operation. As the auxiliary rotating roller 401 rotates, the stirring paddle 403 on the surface of the installation cylinder 402 mixes and stirs the raw material and the enzymolysis solution;

[0058] As the mounting tube 402 rotates, the first adjusting gear 406 meshes with the driving gear 404, and the first limiting rod 407 is slidably installed in the first limiting groove 205. The first adjusting gear 406 will perform a circular motion with the driving gear 404 as the center under the limitation of the first limiting groove 205 and the first gear ring 405, and the first scraper 409 installed by the first mounting rod 408 scrapes the inner wall of the enzymolysis tank 201. At the same time, when the mounting tube 402 rotates, the second adjusting gear 504 is also in a state of meshing with the driving gear 404, and the first adjusting gear 406 is in a state of meshing with the driving gear 404. When the second limiting rod 505 is slidably installed in the second limiting groove 502, under the limitation of the second gear ring 503, the second scraper 507 on the surface of the second mounting rod 506 will make a circular motion opposite to the first scraper 409 with the mounting cylinder 402 as the center. The inner wall of the enzymolysis tank 201 can be scraped by the auxiliary cleaning component 5 and the main cleaning component 4 to ensure that the inner wall is clean, and the raw materials can be prevented from adhering to the inner wall of the enzymolysis tank 201 when being stirred by the stirring paddle 403, ensuring that all raw materials can fully participate in the enzymolysis reaction, thereby improving the utilization rate of the raw materials and the completeness of the enzymolysis.

[0059] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An enzymatic hydrolysis device for collagen extraction, comprising a heating component (1), the heating component (1) comprising a placement tank (101), a bottom support seat (102) being fixedly installed inside the placement tank (101), a control module (103) being fixedly installed on the outer surface of the placement tank (101), a heating pipe (104) being electrically connected to the top of the control module (103), the heating pipe (104) being fixedly installed inside the placement tank (101) through a pipe fixing seat (105), characterized in that: Also includes: An enzymolysis component (2), the enzymolysis component (2) comprising an enzymolysis tank (201), a feed pipe (202) being fixedly mounted on one side of the top of the enzymolysis tank (201), and an enzyme injection pipe (203) being fixedly mounted on one side of the top of the enzymolysis tank (201) away from the feed pipe (202); A stirring assembly (3), the stirring assembly (3) comprising a driving motor (301), and a main rotating roller (302) is fixedly mounted on the output end of the driving motor (301); A main cleaning component (4), the main cleaning component (4) comprising an auxiliary rotating roller (401), a mounting cylinder (402) being fixedly mounted on one side of the auxiliary rotating roller (401), and a stirring paddle (403) being fixedly mounted on the outer surface of the mounting cylinder (402); An auxiliary cleaning component (5), the auxiliary cleaning component (5) comprising a second sealing cover (501), the interior of the second sealing cover (501) being provided with a second limiting groove (502).

2. The enzymatic hydrolysis device for collagen extraction according to claim 1, characterized in that: A first sealing cover (204) is fixedly installed on one side of the enzymolysis tank (201), a first limiting groove (205) is provided inside the first sealing cover (204), a motor fixing seat (206) is fixedly installed on the top of the first sealing cover (204), and a driving motor (301) is fixedly installed inside the motor fixing seat (206).

3. The enzymatic hydrolysis device for collagen extraction according to claim 2, characterized in that: A main rotating roller (302) is fixedly mounted on the output end of the driving motor (301); a transmission belt (303) is sleeved on the outer surface of the main rotating roller (302); an end of the transmission belt (303) away from the main rotating roller (302) is sleeved on the outer surface of a connecting roller (304); the connecting roller (304) is rotatably mounted on the outer surface of the first sealing cover (204); and a chain (305) is sleeved on the outer surface of the connecting roller (304).

4. The enzymatic hydrolysis device for collagen extraction according to claim 3, characterized in that: One end of the chain (305) away from the connecting roller (304) is sleeved on the outer surface of the auxiliary rotating roller (401); the outer surface of the auxiliary rotating roller (401) is provided with a rack meshing with the chain (305); the auxiliary rotating roller (401) is rotatably mounted inside the first sealing cover (204); and a mounting cylinder (402) is fixedly mounted on one side of the auxiliary rotating roller (401).

5. The enzymatic hydrolysis device for collagen extraction according to claim 4, characterized in that: Driving gears (404) are fixedly mounted on both sides of the outer surface of the mounting cylinder (402), a first gear ring (405) is fixedly mounted on the inner wall of the first sealing cover (204), and a first adjusting gear (406) is rotatably mounted inside the first gear ring (405).

6. The enzymatic hydrolysis device for collagen extraction according to claim 5, characterized in that: The first adjusting gear (406) is meshed with the first gear ring (405), the first adjusting gear (406) is meshed with the driving gear (404), and a first limiting rod (407) is fixedly mounted on one side of the first adjusting gear (406).

7. The enzymatic hydrolysis device for collagen extraction according to claim 6, characterized in that: The first limiting rod (407) is slidably mounted inside the first limiting groove (205); a first mounting rod (408) is fixedly mounted on a side of the first adjusting gear (406) away from the first limiting rod (407); and a first scraper (409) is fixedly mounted on an outer surface of the first mounting rod (408).

8. The enzymatic hydrolysis device for collagen extraction according to claim 2, characterized in that: A second sealing cover (501) is fixedly installed on the side of the enzymolysis tank (201) away from the first sealing cover (204), a second gear ring (503) is fixedly installed on the inner wall of the second sealing cover (501), a second adjusting gear (504) is rotatably installed inside the second gear ring (503), and the second adjusting gear (504) is meshed with the second gear ring (503).

9. The enzymatic hydrolysis device for collagen extraction according to claim 8, characterized in that: A second limiting rod (505) is fixedly mounted on one side of the second adjusting gear (504), and the second limiting rod (505) is slidably mounted inside the second limiting groove (502). A second mounting rod (506) is fixedly mounted on the side of the second adjusting gear (504) away from the second limiting rod (505), and a 507 is fixedly mounted on the outer surface of the second mounting rod (506).

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