High-efficiency hydrolysis device for small-molecular sodium hyaluronate
By designing a sliding plug mixer and a constant temperature heating system, the problems of uneven mixing of sodium hyaluronate solution and hydrolytic enzyme and poor temperature transfer were solved, thus achieving efficient sodium hyaluronate hydrolysis.
Patent Information
- Application Number
- CN202423063722.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In existing technologies, the sodium hyaluronate solution and hydrolytic enzyme are not mixed sufficiently in the enzymatic reaction chamber, and the temperature is difficult to transfer quickly, resulting in poor hydrolysis efficiency.
A highly efficient hydrolysis device for small molecule sodium hyaluronate was designed. It adopts a sliding plug mixer and a constant temperature heating system. The cross-mixing of sodium hyaluronate solution and hydrolytic enzyme is achieved through the coordinated movement of the cross rod and the linkage rod. Uniform heating is achieved by using constant temperature water and air pressure control, which improves the mixing uniformity and temperature transfer efficiency.
The mixing uniformity and temperature control of sodium hyaluronate solution and hydrolytic enzyme were improved, thereby increasing the hydrolysis efficiency.
Smart Images
Figure CN223705595U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of sodium hyaluronate hydrolysis, and particularly relates to a high-efficiency hydrolysis device for small-molecule sodium hyaluronate. BACKGROUND
[0002] The hydrolysis principle of the small-molecule sodium hyaluronate is that, by adding a substrate and an enzyme system, sodium hyaluronate solution and hydrolytic enzyme are added into an enzymatic reaction chamber according to a set flow rate and proportion. In the reaction chamber, the sodium hyaluronate solution and the hydrolytic enzyme are mixed under the action of a filter screen, and the enzyme starts to hydrolyze the sodium hyaluronate, so as to hydrolyze the sodium hyaluronate under suitable temperature and substrate-to-enzyme proportion conditions.
[0003] In the prior art, when the sodium hyaluronate solution and the hydrolytic enzyme are added into the enzymatic reaction chamber according to the set flow rate and proportion, the mixing is insufficient, and the set temperature is generally difficult to quickly transfer to the inside of the sodium hyaluronate solution and the hydrolytic enzyme mixture, so that the hydrolysis efficiency cannot meet the satisfactory requirement. Therefore, in order to solve the problem, it is necessary to provide a high-efficiency hydrolysis device for small-molecule sodium hyaluronate. CONTENT OF THE INVENTION
[0004] The application aims at solving the above problems, and provides a high-efficiency hydrolysis device for small-molecule sodium hyaluronate.
[0005] The technical scheme adopted by the application is as follows: a high-efficiency hydrolysis device for small-molecule sodium hyaluronate, comprising a hydrolysis cylinder, the lower sides of the two sides of the hydrolysis cylinder are respectively fixedly connected with an A feeding pipe and a B feeding pipe, the bottom and the left side of the top of the hydrolysis cylinder are respectively fixedly connected with a discharge pipe and an air pressure pipe, the outer end of the air pressure pipe is provided with an air pump, the top of the hydrolysis cylinder is fixedly installed with a top plate, the front side of the top plate is rotatably installed with a rotating disc, the front wall of the top plate is fixedly installed with a guide sleeve on the upper side and the lower side of the rotating disc, a cross rod is insertedly installed on the guide sleeve, the top of the hydrolysis cylinder is fixedly installed with a piston cylinder penetrating into the inner cavity of the hydrolysis cylinder, the bottom end of the cross rod is fixedly connected with a piston in the inner part of the piston cylinder, the front wall outer side of the rotating disc is fixedly installed with a linkage rod, and the linkage rod is slidingly installed in the horizontal section of the middle part of the cross rod.
[0006] The bottom of the piston cylinder is insertedly installed with a transmission rod, and the top inserted end of the transmission rod is fixedly connected with the bottom of the piston inside the piston cylinder.
[0007] In a preferred embodiment, electromagnetic valves are arranged on the A feed pipe, the B feed pipe, the discharge pipe and the air pressure pipe, and the outer end of the discharge pipe is connected with a product separation system.
[0008] In a preferred embodiment, the rear side of the rotating disc is rotatably connected with the top plate through a bearing, and the rear side of the top plate is fixedly installed with a driving motor whose output shaft is fixedly connected with the rear side of the rotating disc.
[0009] In a preferred embodiment, a transverse sliding groove adapted to the linkage rod is arranged in the transverse section of the cross rod, and the linkage rod is slidingly installed in the transverse sliding groove.
[0010] In a preferred embodiment, A constant temperature cavities are arranged in the inner side of the hydrolysis cylinder, B constant temperature cavities are arranged in the inner side of the sliding plug mixer, two corrugated pipes are fixedly connected with the top of the sliding plug mixer, the top end of the corrugated pipe is fixedly connected with the inner cavity of the hydrolysis cylinder, the A constant temperature cavities and the B constant temperature cavities are connected through the corrugated pipes, and constant temperature water pipes are fixedly connected with the A constant temperature cavities on the upper side of the two sides of the hydrolysis cylinder.
[0011] In a preferred embodiment, a sliding piece is slidingly installed in the inner side of the one-way head, the two ends of the sliding piece are fixedly connected with the inner side of the one-way head through return springs, a through hole is arranged on the sliding piece, a sealing plug is attached to the outer end of the one-way head, and the inner end of the sealing plug is fixedly connected with the sliding piece through a connecting rod.
[0012] In summary, due to the adoption of the above technical solutions, the application has the following advantages:
[0013] In the present application, through the above design, the driving motor at the rear side of the top plate drives the rotating disc to rotate, which can make the linkage rod move in a circular direction. At this time, due to the guiding and limiting of the guide sleeve to the cross rod, the circularly moving linkage rod will extrude the cross rod through the transverse sliding groove in the middle transverse section of the cross rod to make the cross rod move up and down in a straight line. Based on this, when using the device, first connect the constant temperature water system to the constant temperature water pipe. At this time, the constant temperature water will flow into the A constant temperature cavity and through the bellows into the B constant temperature cavity inside the sliding plug mixer to realize circular flow to heat the hydrolysis cylinder and the sliding plug mixer. Then open the electromagnetic valve on the air pressure pipe and start the air pump to extract a certain amount of air in the hydrolysis cylinder through the air pressure pipe to create a negative pressure state. Then close the electromagnetic valve on the air pressure pipe and connect the sodium hyaluronate solution and the hydrolysis enzyme feeding device through the A feeding pipe and the B feeding pipe respectively. Then open the electromagnetic valves on the A feeding pipe and the B feeding pipe to send the sodium hyaluronate solution and the hydrolysis enzyme into the inside of the hydrolysis cylinder for filling. After filling, close the electromagnetic valves on the A feeding pipe and the B feeding pipe to form a sealed environment in the inside of the hydrolysis cylinder.
[0014] At this time, start the driving motor on the top plate to drive the cross rod to move up and down, so that the bottom end of the cross rod drives the transmission rod to move up and down through the piston. At this time, the transmission rod drives the sliding plug mixer to move up and down. During this process, when the sliding plug mixer moves down, the sodium hyaluronate solution and the hydrolysis enzyme mixed solution in the inside of the hydrolysis cylinder will flow into the flow channel through the liquid inlet hole at the bottom of the sliding plug mixer, and be divided into multiple streams through the multiple inclined shunt pipes and flow into the mixing chamber. Due to the crosswise inclined arrangement of the shunt pipes on the inside of the flow channel on both sides, the sodium hyaluronate solution and the hydrolysis enzyme mixed solution will crosswise impact and mix in the mixing chamber, and finally extrude the sealing plug to open the channel and be discharged into the space above the sliding plug mixer in the inside of the hydrolysis cylinder. When the sliding plug mixer moves down, the mixed solution flows into the sliding plug mixer from the liquid inlet hole above the sliding plug mixer, and extrudes the sealing plug from the lower end of the one-way head at the bottom of the sliding plug mixer. During this process, since the sodium hyaluronate solution and the hydrolysis enzyme mixed solution are divided into multiple streams and crosswise mixed, the mixing uniformity is improved. At the same time, since the hydrolysis cylinder and the sliding plug mixer are heated by the constant temperature water, the mixed solution receives heat transfer when being divided into multiple streams, thereby improving the constant temperature effect of the mixed solution to increase the hydrolysis efficiency of the sodium hyaluronate solution and the hydrolysis enzyme. After hydrolysis, open the electromagnetic valves on the discharge pipe and the air pressure pipe, and start the air pump to inflate the inside of the hydrolysis cylinder, so that the hydrolyzed mixture is discharged into the product separation system through the discharge pipe for subsequent final separation work. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural internal schematic view of the hydrolysis cylinder in the present application.
[0016] Figure 2 It is a structural schematic view of the present application.
[0017] Figure 3 Figure 1 is a left view of the structure of the sliding plug mixer in the present application.
[0018] Figure 1 is a left view of the structure of the sliding plug mixer in the present application. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.
[0020] REFERENCE Figure 1 , 2 The present application is a kind of high-efficiency hydrolysis device for small molecule sodium hyaluronate, which comprises a hydrolysis cylinder 1, the lower side of the hydrolysis cylinder 1 is fixedly connected with an A feeding pipe 2 and a B feeding pipe 3 respectively, the bottom and the left side of the top of the hydrolysis cylinder 1 are fixedly connected with a discharge pipe 4 and an air pressure pipe 5 respectively, electromagnetic valves are arranged on the A feeding pipe 2, the B feeding pipe 3, the discharge pipe 4 and the air pressure pipe 5, the outer end of the discharge pipe 4 is connected with a product separation system, a gas pump 6 is arranged at the outer end of the air pressure pipe 5, a top plate 7 is fixedly installed on the top of the hydrolysis cylinder 1, a rotating disc 8 is rotatably installed on the front side of the top plate 7, the rear side of the rotating disc 8 is rotatably connected with the top plate 7 through a bearing, a drive motor is fixedly installed on the rear side of the top plate 7 and fixedly connected with the rear side center of the rotating disc 8, guide sleeves 9 are fixedly installed on the front wall of the top plate 7 on the upper and lower sides of the rotating disc 8, cross bars 11 are insertedly installed on the guide sleeves 9, a piston cylinder 10 is fixedly installed at the top end of the hydrolysis cylinder 1 and penetrates the inner cavity of the hydrolysis cylinder 1, the bottom end of the cross bar 11 is fixedly connected with a piston in the inner part of the piston cylinder 10, a linkage rod 12 is fixedly installed on the front wall outer side of the rotating disc 8, the linkage rod 12 is slidingly installed in the horizontal section of the middle part of the cross bar 11, a horizontal sliding groove is formed in the horizontal section of the middle part of the cross bar 11 and matched with the linkage rod 12, and the linkage rod 12 is slidingly installed in the horizontal sliding groove.
[0021] Through the above design, the drive motor on the rear side of the top plate 7 drives the rotating disc 8 to rotate, which can make the linkage rod 12 move in a cycle circumferential direction, at this time, the guide sleeves 9 guide and limit the cross bar 11, so that the linkage rod 12 moving in the cycle circumferential direction will extrude and drive the cross bar 11 to move in a straight line type up and down reciprocating motion through the horizontal sliding groove in the horizontal section of the middle part of the cross bar 11.
[0022] Referring to Figure 1 , 2 , 3, the bottom of the piston cylinder 10 is inserted and installed with a transmission rod 13, and the top end of the transmission rod 13 is fixedly connected with the bottom of the piston inside the piston cylinder 10, the inside of the hydrolysis cylinder 1 is slidably installed with a sliding plug mixer 14, the outer periphery of the sliding plug mixer 14 is provided with a sealing ring, the inside of the hydrolysis cylinder 1 is provided with an A constant temperature cavity 15 which is mutually connected, the inside of the sliding plug mixer 14 is provided with a B constant temperature cavity 17 which is mutually connected, the top of the sliding plug mixer 14 is fixedly connected with two corrugated pipes 16, the top end of the corrugated pipe 16 is fixedly connected with the inner cavity top of the hydrolysis cylinder 1, the A constant temperature cavity 15 and the B constant temperature cavity 17 are connected through the corrugated pipe 16, the upper sides of the two sides of the hydrolysis cylinder 1 are fixedly connected with a constant temperature water pipe 25 which is connected with the A constant temperature cavity 15, the bottom and the top of the sliding plug mixer 14 are respectively fixedly installed with a one-way head 19, the inside of the one-way head 19 is slidably installed with a sliding sheet 20, the two ends of the sliding sheet 20 are fixedly connected with the inside of the one-way head 19 through a return spring, a through hole is formed in the sliding sheet 20, the outer end of the one-way head 19 is attached with a sealing plug 21, the inner end of the sealing plug 21 is fixedly connected with the sliding sheet 20 through a connecting rod, the top and the bottom of the sliding plug mixer 14 are respectively provided with a liquid inlet hole 22, the inside of the sliding plug mixer 14 is provided with a plurality of flow channels 23 which are connected with the liquid inlet hole 22, the inside of the sliding plug mixer 14 is provided with a mixing cavity 18 which is connected with the one-way head 19, the inside of the flow channel 23 is fixedly connected with a plurality of shunt pipes 24 which extend into the inside of the mixing cavity 18, the shunt pipes 24 on the inside of the two flow channels 23 are crosswise and obliquely arranged.
[0023] Through the above design, in combination with the description in the above paragraph, when using the device, first connect the constant temperature water system with the constant temperature water pipe 25, at this time the constant temperature water will be poured into the A constant temperature cavity 15 and through the corrugated pipe 16 into the B constant temperature cavity 17 inside the sliding plug mixer 14 at the same time, to realize the circulation flow to constant temperature heat the hydrolysis cylinder 1 and the sliding plug mixer 14, then open the electromagnetic valve on the air pressure pipe 5, and start the air pump 6 to extract a certain amount of air in the inner cavity of the hydrolysis cylinder 1 through the air pressure pipe 5, to create a negative pressure state, then close the electromagnetic valve on the air pressure pipe 5 and connect the sodium hyaluronate solution and the hydrolytic enzyme feeding device through the A feeding pipe 2 and the B feeding pipe 3 respectively, then open the electromagnetic valves on the A feeding pipe 2 and the B feeding pipe 3, to send the sodium hyaluronate solution and the hydrolytic enzyme into the inside of the hydrolysis cylinder 1 for filling, after filling, close the electromagnetic valves on the A feeding pipe 2 and the B feeding pipe 3, so that a sealed environment is formed in the inside of the hydrolysis cylinder 1, at this time start the drive motor on the top plate 7 to drive the cross rod 11 to reciprocate up and down, so that the bottom end of the cross rod 11 drives the transmission rod 13 to reciprocate up and down through the piston;
[0024] At this time, the transmission rod 13 drives the sliding plug mixer 14 to move up and down reciprocally. During the process, when the sliding plug mixer 14 moves downward, the sodium hyaluronate solution and the hydrolytic enzyme mixture in the hydrolysis cylinder 1 will be filled into the flow channel 23 through the liquid inlet hole 22 at the bottom of the sliding plug mixer 14, and be divided into multiple streams and filled into the mixing chamber 18 through the multiple shunt pipes 24 arranged obliquely. Due to the crosswise and oblique arrangement of the shunt pipes 24 on the inner sides of the two flow channels 23, the sodium hyaluronate solution and the hydrolytic enzyme mixture will be mixed in the mixing chamber 18 by crosswise impact, and finally extrude the sealing plug 21 to open the channel and be discharged to the space above the sliding plug mixer 14 in the hydrolysis cylinder 1. When the sliding plug mixer 14 moves downward, the mixture will flow into the liquid inlet hole 22 opened above the sliding plug mixer 14, and be discharged from the one-way head 19 at the bottom of the sliding plug mixer 14. During the process, due to the crosswise mixing of the sodium hyaluronate solution and the hydrolytic enzyme mixture, the mixing uniformity is improved. At the same time, due to the constant temperature water heating of the hydrolysis cylinder 1 and the sliding plug mixer 14, the mixture receives heat transmission when being divided into multiple streams, thereby improving the constant temperature effect of the mixture, increasing the hydrolysis efficiency of the sodium hyaluronate solution and the hydrolytic enzyme, and opening the electromagnetic valves on the discharge pipe 4 and the air pressure pipe 5. At the same time, the air pump 6 is started to inflate the inside of the hydrolysis cylinder 1, so that the mixture after hydrolysis is discharged into the product separation system through the discharge pipe 4 to perform subsequent final separation work.
[0025] The implementation principle of the embodiment of the present application is:
[0026] Firstly, through the above design, the drive motor at the back of the top plate 7 drives the rotating disc 8 to rotate, which can make the linkage rod 12 move circularly. At this time, the cross rod 11 is guided and limited by the guide sleeve 9, so that the circularly moving linkage rod 12 will extrude the cross rod 11 through the horizontal sliding groove in the middle horizontal section of the cross rod 11 to make the cross rod 11 move up and down reciprocatingly. Based on this, when using the device, first connect the constant temperature water system with the constant temperature water pipe 25, at this time the constant temperature water will flow into the A constant temperature cavity 15 and through the corrugated pipe 16 into the B constant temperature cavity 17 inside the sliding plug mixer 14 to realize the circulation to heat the hydrolysis cylinder 1 and the sliding plug mixer 14. Then open the electromagnetic valve on the air pressure pipe 5 and start the air pump 6 to extract a certain amount of air in the hydrolysis cylinder 1 through the air pressure pipe 5 to create a negative pressure state. Then close the electromagnetic valve on the air pressure pipe 5 and connect the sodium hyaluronate solution and the hydrolytic enzyme feeding device through the A feeding pipe 2 and the B feeding pipe 3 respectively. Then open the electromagnetic valves on the A feeding pipe 2 and the B feeding pipe 3 to send the sodium hyaluronate solution and the hydrolytic enzyme into the hydrolysis cylinder 1 for filling. After filling, close the electromagnetic valves on the A feeding pipe 2 and the B feeding pipe 3 to form a sealed environment in the hydrolysis cylinder 1. At this time, start the drive motor on the top plate 7 to drive the cross rod 11 to move up and down reciprocatingly, so that the bottom end of the cross rod 11 drives the transmission rod 13 to move up and down reciprocatingly through the piston. At this time, the transmission rod 13 drives the sliding plug mixer 14 to move up and down reciprocatingly. In this process, when the sliding plug mixer 14 moves down, the sodium hyaluronate solution and the hydrolytic enzyme mixed solution in the hydrolysis cylinder 1 will flow into the flow channel 23 through the liquid inlet hole 22 at the bottom of the sliding plug mixer 14, and be divided into multiple streams and flow into the mixing cavity 18 through the multiple inclined shunt pipes 24. Because the shunt pipes 24 on the inner sides of the two flow channels 23 are crosswise and inclined, the sodium hyaluronate solution and the hydrolytic enzyme mixed solution will crosswise impact and mix in the mixing cavity 18, and finally extrude the sealing plug 21 to open the channel and flow into the space above the sliding plug mixer 14 in the hydrolysis cylinder 1. When the sliding plug mixer 14 moves down, the mixed solution flows into the space above the sliding plug mixer 14 from the liquid inlet hole 22, and extrudes the sealing plug 21 from the lower end of the one-way head 19 at the bottom of the sliding plug mixer 14. In this process, because the sodium hyaluronate solution and the hydrolytic enzyme mixed solution are divided into multiple streams and crosswise mixed, the mixing uniformity is improved. At the same time, because the hydrolysis cylinder 1 and the sliding plug mixer 14 are heated by the constant temperature water, the mixed solution receives heat transmission when being divided into multiple streams, which improves the constant temperature effect of the mixed solution to increase the hydrolysis efficiency of the sodium hyaluronate solution and the hydrolytic enzyme. After hydrolysis, open the electromagnetic valves on the discharge pipe 4 and the air pressure pipe 5, and start the air pump 6 to inflate the hydrolysis cylinder 1 to discharge the hydrolyzed mixture into the product separation system through the discharge pipe 4 for subsequent final separation work.
[0027] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, and improvement made in the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A high-efficiency hydrolysis device for small-molecule sodium hyaluronate, comprising a hydrolysis cylinder (1), characterized in that: The lower sides of the hydrolysis cylinder (1) are respectively fixedly connected with an A feeding pipe (2) and a B feeding pipe (3), the bottom and the left side of the top of the hydrolysis cylinder (1) are respectively fixedly connected with a discharge pipe (4) and an air pressure pipe (5), the outer end of the air pressure pipe (5) is provided with an air pump (6), the top of the hydrolysis cylinder (1) is fixedly installed with a top plate (7), the front side of the top plate (7) is rotatably installed with a rotating disc (8), the front wall of the top plate (7) is fixedly installed with a guide sleeve (9) on the upper side and the lower side of the rotating disc (8), a cross rod (11) is insertedly installed on the guide sleeve (9), the top end of the cross rod (11) is fixedly connected with a piston inside the piston cylinder (10) penetrating into the inner cavity of the hydrolysis cylinder (1), the front wall outer side of the rotating disc (8) is fixedly installed with a linkage rod (12), the linkage rod (12) is slidingly installed in the transverse section of the middle part of the cross rod (11). The bottom of the piston cylinder (10) is insertedly installed with a transmission rod (13), and the top inserted end of the transmission rod (13) is fixedly connected with the bottom of the piston inside the piston cylinder (10), the inside of the hydrolysis cylinder (1) is slidingly installed with a sliding plug mixer (14), the outer periphery of the sliding plug mixer (14) is provided with a sealing ring, the bottom and the top of the sliding plug mixer (14) are respectively fixedly installed with a one-way head (19), the top and the bottom of the sliding plug mixer (14) are respectively provided with a liquid inlet hole (22), the inside of the sliding plug mixer (14) is provided with a plurality of flow channels (23) on the two sides and communicated with the liquid inlet hole (22), the inside of the sliding plug mixer (14) is provided with a mixing cavity (18) in the middle part and communicated with the one-way head (19), the inside of the flow channel (23) is fixedly connected with a plurality of shunt pipes (24) extending into the inside of the mixing cavity (18), and the shunt pipes (24) on the inside of the flow channels (23) on the two sides are crossly and obliquely arranged.
2. The device for high efficiency hydrolysis of small molecule hyaluronic acid sodium of claim 1, characterized in that: The A feeding pipe (2), the B feeding pipe (3), the discharge pipe (4) and the air pressure pipe (5) are all provided with electromagnetic valves, and the outer end of the discharge pipe (4) is connected with a product separation system.
3. The device for high efficiency hydrolysis of small molecule hyaluronic acid sodium of claim 1, characterized in that: The rear side of the rotating disc (8) is rotatably connected with the top plate (7) through a bearing, and the rear side of the top plate (7) is fixedly installed with a drive motor whose output shaft is fixedly connected with the rear side center of the rotating disc (8).
4. The device for high efficiency hydrolysis of small molecule hyaluronic acid sodium of claim 1, characterized in that: The transverse section of the middle part of the cross rod (11) is provided with a transverse sliding groove matched with the linkage rod (12), and the linkage rod (12) is slidingly installed in the transverse sliding groove.
5. The device for efficient hydrolysis of small molecules of hyaluronic acid sodium according to claim 1, characterized in that: The inside of the hydrolysis cylinder (1) is provided with an A constant temperature cavity (15) communicated with each other around the periphery, the inside of the sliding plug mixer (14) is provided with a B constant temperature cavity (17) communicated with each other, the top of the sliding plug mixer (14) is fixedly connected with two corrugated pipes (16), the top end of the corrugated pipe (16) is fixedly connected with the inner cavity top of the hydrolysis cylinder (1), the A constant temperature cavity (15) and the B constant temperature cavity (17) are communicated through the corrugated pipe (16), and the upper sides of the two sides of the hydrolysis cylinder (1) are both fixedly connected with a constant temperature water pipe (25) communicated with the A constant temperature cavity (15).
6. The device for efficient hydrolysis of small molecules of hyaluronic acid sodium according to claim 1, characterized in that: The inside of the one-way head (19) is slidably installed with a sliding sheet (20), both ends of the sliding sheet (20) are fixedly connected with the inside of the one-way head (19) through a reset spring, a through hole is formed on the sliding sheet (20), and the outer end of the one-way head (19) is attached with a sealing plug (21), and the inner end of the sealing plug (21) is fixedly connected with the sliding sheet (20) through a connecting rod.