Packaging structure for preventing high-temperature deformation of pure honey candies

Abstract

The invention relates to the technical field of preservation of pure honey candies, and particularly discloses a packaging structure for preventing high-temperature deformation of pure honey candies, the packaging structure comprises a base, a packaging tank is mounted on the surface of the base, and a guide cavity is embedded in the bottom surface of the packaging tank; and an induction structure is arranged in the packaging tin, and the induction structure comprises that the outer side of the packaging tin is sleeved with a heat insulation layer, and a nitrogen storage tank is installed on the surface of the packaging tin. According to the packaging structure capable of preventing high-temperature deformation of the pure honey candies, the sensing structure is arranged to protect the candies inside, the nitrogen sensor can control the electromagnetic valve to be opened, nitrogen is poured into the packaging tank through the electromagnetic valve, a low-oxygen or oxygen-free environment is created, aerobic microorganisms are difficult to survive and breed, and therefore the deterioration speed of the candies is slowed down; meanwhile, the heat insulation layer resists the introduction of external heat, a relatively stable temperature environment is provided for the candies, and the practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pure honey candy preservation, and specifically provides a packaging structure for preventing pure honey candy from deforming at high temperatures. Background Art

[0002] Pure honey candy is a candy made mainly from honey, with a unique flavor and certain nutritional value. As the core raw material, honey provides the sweetness and unique flavor of the candy. The quality of honey is crucial. Honey from different flower sources will endow the candy with different aromas and tastes. For example, acacia honey has a light and delicate fragrance, linden honey has a unique linden flower fragrance, and jujube honey has a rich and sweet taste. High-quality honey is also rich in nutrients such as glucose, fructose, vitamins, minerals, and amino acids, making the candy have certain nutritional value while being delicious; Pour the honey into a pot and slowly heat it over low heat to melt the honey and reach an appropriate temperature without destroying the nutritional components and flavor of the honey. During the heating process, it is necessary to continuously stir to prevent the honey from sticking to the pot and burning. Add appropriate amounts of spices, edible gums, and other ingredients as needed, and continue to stir evenly to fully blend all the raw materials. Pour the cooked honey syrup into a pre-prepared mold and let it cool and solidify naturally, or put it in the refrigerator to refrigerate to accelerate the solidification process. You can also pour the syrup onto a chopping board sprinkled with powdered sugar, roll it into a thin sheet with a rolling pin, and then use a mold to press out various shapes of candies. After the candies are completely cooled and shaped, take them out of the mold and package them. The packaging materials usually choose food-grade plastic paper, tin foil, or cellophane, etc., to maintain the freshness and taste of the candies and prevent them from getting damp and deteriorating. When storing pure honey candies, the pure honey candies should be stored inside a low-temperature and dry packaging structure. However, when the existing packaging structure is in use, it cannot cool down the pure honey candies, which may cause them to soften excessively, making the candies become too soft and lose their original elasticity and chewiness. If the temperature is too high and lasts for a long time, the candies may even melt into a paste and completely lose their original taste. At the same time, the surface of the candies becomes uneven, with bumps, depressions, etc., which reduces the visual effect of the product. Summary of the Invention

[0003] The purpose of the present invention is to provide a packaging structure for preventing pure honey candy from deforming at high temperatures, so as to solve the problem proposed in the above background art that the pure honey candies cannot be cooled down, which may cause them to soften excessively, and at the same time the surface of the candies becomes uneven.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A packaging structure for preventing pure honey candy from deforming at high temperatures, including a base, on the surface of which a packaging can is installed, and a guiding cavity is embedded at the bottom surface of the packaging can; A sealing mechanism is provided inside the packaging can, and the sealing mechanism includes: a heat insulation layer is sleeved and installed outside the packaging can, and a nitrogen storage tank is installed on the surface of the packaging can. A pipeline is connected to the surface of the nitrogen storage tank, and an electromagnetic valve is connected to the surface of the pipeline. A drainage cavity is installed on the inner surface of the guiding cavity, and exhaust pipes are arranged around the surface of the drainage cavity, and the ends of the exhaust pipes penetrate through the surface of the guiding cavity. The end of the pipeline is inserted into the packaging can and is connected to the surfaces of the guiding cavity and the drainage cavity. A nitrogen sensor is installed on the inner surface of the packaging can. A moving block is slidably installed inside the guiding cavity in an embedded manner, and a first circular groove is embedded on the surface of the moving block, and a placement groove is arranged on the surface of the moving block. A placement plate is fixedly connected to the bottom of the packaging can.

[0005] Preferably, a sliding structure is provided inside the guiding cavity, and the sliding structure includes: a second circular groove is embedded on the surface of the guiding cavity, an airbag is installed on the inner surface of the guiding cavity, and a first sealing strip is installed around the inner wall of the guiding cavity. A second sealing strip is installed around the surface of the moving block.

[0006] With the above technical solution, through the sliding structure, the candies inside can be protected, and at the same time, the candies are prevented from being fixed inside the packaging can.

[0007] Preferably, the bottom of the packaging can is set to a semi-circular structure, and the bottom of the guiding cavity is set to be open, and the bottom of the guiding cavity is fixedly embedded in the bottom surface of the packaging can.

[0008] With the above technical solution, the candies inside the packaging can move downward along the inner wall of the packaging can due to gravity, which is convenient for the candies to be exported.

[0009] Preferably, the drainage cavity is installed at the top of the guiding cavity, and the guiding cavity is set to a cylindrical structure.

[0010] With the above technical solution, air enters the drainage cavity, and nitrogen is dispersed into the packaging can through the inside of the drainage cavity, improving the effect of nitrogen.

[0011] Preferably, an opening is provided on the surface of the guiding cavity, and the end surface of the airbag is embedded inside the opening of the guiding cavity, and the airbag is arranged at the bottom of the drainage cavity.

[0012] With the above technical solution, when the airbag is squeezed, the surface of the airbag penetrates through the opening of the guiding cavity, and the airbag protrudes outward, which can squeeze the candies inside, prevent the candies from being stuck together, and make the candies roll.

[0013] Preferably, the moving block is set to a cylindrical structure, and the moving block is embedded inside the bottom opening of the guiding cavity. The guiding cavity and the moving block are in a sliding connection, and the moving block is arranged outside the guiding cavity.

[0014] Adopt the above technical solution, pull the moving block, so that the moving block slides inside the guiding cavity, and at the same time, the moving block is pulled out from the bottom of the guiding cavity.

[0015] Preferably, the end of the moving block is correspondingly arranged with the position of the airbag, and the airbag is arranged in a cylindrical structure.

[0016] Adopt the above technical solution, push the moving block upward, so that the end of the moving block moves upward, and the end of the moving block squeezes the airbag, causing the airbag to contract.

[0017] Preferably, the first circular groove is arranged inside the placing groove, the cross-section of the placing groove is set as an inclined plane, and the first circular groove is arranged at the bottommost end of the placing groove, and the first circular groove is correspondingly arranged with the position of the placing plate.

[0018] Adopt the above technical solution, the candy enters the inside of the placing groove through the first circular groove, so that the candy moves downward through the placing groove, which is convenient for taking out the candy.

[0019] Preferably, the second circular groove is correspondingly arranged with the position of the first circular groove, a sliding groove is embedded at the bottom of the packaging can, the second circular groove is arranged at the end of the sliding groove of the packaging can, and the second circular groove is correspondingly arranged with the sliding groove of the packaging can, and the end of the moving block is correspondingly arranged with the position of the second circular groove.

[0020] Adopt the above technical solution, the candy enters the inside of the first circular groove through the second circular groove, which is convenient for taking out the candy from the inside of the packaging can. When the candy is taken out, the inside of the packaging can is sealed, reducing the air entering the inside of the packaging can, and reducing the air entering the inside of the packaging can.

[0021] Preferably, the first sealing strip is arranged at the opening of the guiding cavity, and the first sealing strip is arranged at the bottom of the second sealing strip. The first sealing strip fits the surface of the moving block, and the moving block and the first sealing strip are in sliding connection. The end of the second sealing strip fits the inner wall of the guiding cavity, and the guiding cavity and the second sealing strip are in sliding connection.

[0022] Adopt the above technical solution, the first sealing strip can block the second sealing strip to prevent the moving block from moving downward, and at the same time seal between the moving block and the guiding cavity.

[0023] Compared with the prior art, the beneficial effect of the present invention is: the packaging structure for preventing pure honey candy from deforming at high temperature: 1. An induction structure is provided to protect the internal candy. The nitrogen sensor can control the opening of the electromagnetic valve, and pour nitrogen into the inside of the packaging can through the electromagnetic valve to create a low-oxygen or oxygen-free environment, making it difficult for aerobic microorganisms to survive and reproduce, thereby slowing down the deterioration speed of the candy. At the same time, the heat insulation layer resists the incoming external heat, providing a relatively stable temperature environment for the candy and improving the practicability of the device; 2. A sliding structure is provided. By pulling the moving block, the first circular groove coincides with the second circular groove, allowing the candy to enter the interior of the moving block from the packaging can. Pulling the moving block downward can cause the moving block to drive the candy downward, enabling the candy to fall from the placement groove onto the surface of the placement plate, facilitating the removal of the candy. 3. A moving block is provided. After pulling the slider outward, the interior of the guiding cavity is in a negative pressure state. At this time, the air inside the packaging can enters the interior of the guiding cavity, and a vacuum state is formed inside the packaging can to protect the candies inside through the vacuum state. 4. A first sealing strip and a second sealing strip are provided. When removing the candy, the second circular groove can be blocked by the moving block to prevent external air from entering the interior of the packaging can and prevent moisture from entering the interior of the packaging can. When removing the candy, the first sealing strip and the second sealing strip can block the guiding cavity to prevent air from entering the interior of the guiding cavity. 5. A moving block and an airbag are provided. When the moving block moves upward, it can squeeze the internal airbag, causing the airbag to be squeezed. The outer side of the airbag extends outward, enabling the airbag to extend into the interior of the packaging can and squeeze the candies inside the packaging can, preventing the candies from getting stuck together. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structure diagram of the present invention; Figure 2 It is a three-dimensional structure diagram of the electromagnetic valve installation of the present invention; Figure 3 It is a three-dimensional structure diagram of the internal installation of the canning of the present invention; Figure 4 It is a three-dimensional structure diagram of the pipeline installation of the present invention; Figure 5 It is a three-dimensional structure diagram of the internal installation of the guiding cavity of the present invention; Figure 6 It is a three-dimensional structure diagram of the placement groove installation of the present invention; Figure 7 It is a three-dimensional structure diagram of the second circular groove installation of the present invention; Figure 8 It is a three-dimensional structure diagram of the drainage cavity installation of the present invention; Figure 9 It is a three-dimensional structure diagram of the airbag installation of the present invention; Figure 10 It is a three-dimensional structure diagram of the second sealing strip installation of the present invention; Figure 11 It is a three-dimensional structure diagram of the first circular groove installation of the present invention.

[0025] In the figure: 10, base; 20. Packaging can; 201. Heat insulation layer; 202. Nitrogen storage tank; 203. Pipeline; 204. Electromagnetic valve; 205. Drainage cavity; 206. Exhaust pipe; 207. Nitrogen sensor; 30. Guide cavity; 40. Moving block; 402. First circular groove; 403. Placing groove; 404. Placing plate; 405. Second circular groove; 406. Airbag; 407. First sealing strip; 408. Second sealing strip. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-11 , the present invention provides a technical solution: a packaging structure for preventing pure honey candies from deforming at high temperatures, including a base 10, a packaging can 20, a heat insulation layer 201, a nitrogen storage tank 202, a pipeline 203, an electromagnetic valve 204, a drainage cavity 205, an exhaust pipe 206, a nitrogen sensor 207, a guide cavity 30, a moving block 40, a first circular groove 402, a placing groove 403, a placing plate 404, a second circular groove 405, an airbag 406, a first sealing strip 407 and a second sealing strip 408; This pure honey candy packaging structure facilitates filling nitrogen into the interior of the packaging can 20 and simultaneously reduces the high temperature inside the packaging can 20. The specific implementation manner is as follows: The surface of the base 10 is mounted with a packaging can 20, and a guiding cavity 30 is embedded and mounted on the bottom surface of the packaging can 20; an induction structure is arranged inside the packaging can 20, and the induction structure includes: a heat insulation layer 201 is sleeved and mounted on the outside of the packaging can 20, and a nitrogen storage tank 202 is mounted on the surface of the packaging can 20. A pipeline 203 is connected to the surface of the nitrogen storage tank 202, and an electromagnetic valve 204 is connected to the surface of the pipeline 203. A drainage cavity 205 is mounted on the inner surface of the guiding cavity 30, and exhaust pipes 206 are arranged around the surface of the drainage cavity 205. And the end of the exhaust pipe 206 penetrates through the surface of the guiding cavity 30. The end of the pipeline 203 is inserted into the packaging can 20 and is connected to the surfaces of the guiding cavity 30 and the drainage cavity 205. A nitrogen sensor 207 is mounted on the inner surface of the packaging can 20. The bottom of the packaging can 20 is set as a semi-circular structure, and the bottom of the guiding cavity 30 is set as an opening. The bottom of the guiding cavity 30 is embedded and fixed on the bottom surface of the packaging can 20. The drainage cavity 205 is mounted on the top of the guiding cavity 30. The guiding cavity 30 is set as a cylindrical structure. An opening is arranged on the surface of the guiding cavity 30, and the end surface of the airbag 406 is embedded in the opening of the guiding cavity 30. The airbag 406 is arranged at the bottom of the drainage cavity 205.

[0028] The heat insulation layer 201 can insulate the heat outside the packaging can 20 to prevent heat from being transferred into the packaging can 20, so that the inside of the packaging can 20 is at a low temperature. The nitrogen sensor 207 detects the nitrogen in the packaging can 20. When it is found that the content of nitrogen in the gas inside the packaging can 20 is small, the nitrogen sensor 207 can control the electromagnetic valve 204 and the nitrogen storage tank 202 to open. The electromagnetic valve 204 controls the pipeline 203 to open, and the nitrogen is transported into the pipeline 203 through the nitrogen storage tank 202, so that the gas enters the drainage cavity 205 through the pipeline 203, enters different exhaust pipes 206 through the drainage cavity 205, and enters the packaging can 20 through the exhaust pipes 206, so that the nitrogen enters the middle of the packaging can 20 and increases the nitrogen inside the packaging can 20. Figure 3 At the same time, when the air pressure inside the packaging can 20 becomes large, the excess gas can be discharged through the exhaust valve on the surface of the packaging can 20.

[0029] This pure honey candy packaging structure is convenient for taking the candy and creates a vacuum inside the packaging can 20. The specific implementation method is as follows: A moving block 40 is slidably installed inside the guiding cavity 30. A first circular groove 402 is embedded on the surface of the moving block 40, and a placement groove 403 is arranged on the surface of the moving block 40. A placement plate 404 is fixedly connected to the bottom of the packaging can 20. A second circular groove 405 is embedded on the surface of the guiding cavity 30. A sliding structure is arranged inside the guiding cavity 30, and the sliding structure includes: an airbag 406 is installed on the inner surface of the guiding cavity 30, and a first sealing strip 407 is installed around the inner wall of the guiding cavity 30. A second sealing strip 408 is installed around the surface of the moving block 40. An opening is arranged on the surface of the guiding cavity 30, and the end surface of the airbag 406 is embedded inside the opening of the guiding cavity 30. The airbag 406 is arranged at the bottom of the drainage cavity 205. The moving block 40 is arranged in a cylindrical structure, and the moving block 40 is embedded inside the bottom opening of the guiding cavity 30. The guiding cavity 30 and the moving block 40 are in sliding connection. The moving block 40 is arranged outside the guiding cavity 30. The end of the moving block 40 is correspondingly arranged with the position of the airbag 406, and the airbag 406 is arranged in a cylindrical structure. The first circular groove 402 is arranged inside the placement groove 403, and the cross-section of the placement groove 403 is arranged as an inclined plane, and the first circular groove 402 is arranged at the bottommost end of the placement groove 403. The first circular groove 402 is correspondingly arranged with the position of the placement plate 404. The second circular groove 405 is correspondingly arranged with the position of the first circular groove 402. A sliding groove is embedded at the bottom of the packaging can 20. The second circular groove 405 is arranged at the end of the sliding groove of the packaging can 20, and the second circular groove 405 is correspondingly arranged with the position of the sliding groove of the packaging can 20. The end of the moving block 40 is correspondingly arranged with the position of the second circular groove 405. The first sealing strip 407 is arranged at the opening of the guiding cavity 30, and the first sealing strip 407 is arranged at the bottom of the second sealing strip 408. The first sealing strip 407 is attached to the surface of the moving block 40, and the moving block 40 and the first sealing strip 407 are in sliding connection. The end of the second sealing strip 408 is attached to the inner wall of the guiding cavity 30, and the guiding cavity 30 and the second sealing strip 408 are in sliding connection.

[0030] Such as Figure 3, Push the moving block 40 upward, so that the end of the moving block 40 moves upward inside the guiding cavity 30. The end of the moving block 40 squeezes the airbag 406 upward, causing the bottom of the airbag 406 to contract. At this time, the airbag 406 expands outward, so that the end of the airbag 406 is pushed out from the opening of the guiding cavity 30, and the end of the airbag 406 moves into the interior of the packaging can 20. At this time, the end of the airbag 406 can push the candies outward, preventing the candies from getting stuck together, making the movement of the candies smoother. At the same time, the moving block 40 drives the first circular groove 402 upward. When the first circular groove 402 moves to the second circular groove 405, at this time, the candies can roll through the sliding groove on the surface of the packaging can 20 to the second circular groove 405, enter the first circular groove 402 through the second circular groove 405, and fall into the placing groove 403 through the first circular groove 402. During this process, the first sealing strip 407 seals the bottom of the guiding cavity 30 to prevent gas from entering the interior of the guiding cavity 30 and the interior of the packaging can 20; Pull the moving block 40 downward, so that the moving block 40 moves downward inside the guiding cavity 30. At this time, the moving block 40 drives the placing groove 403 downward, causing the candies inside the placing groove 403 to move downward. When the positions of the first circular groove 402 and the second circular groove 405 are staggered, at this time, the first circular groove 402 moves to the solid part of the guiding cavity 30, and the guiding cavity 30 can block the first circular groove 402. At the same time, the bottom of the moving block 40 moves out from the end of the airbag 406, the pressure on the airbag 406 contracts, causing the airbag 406 to contract into the interior of the guiding cavity 30. The moving block 40 drives the second sealing strip 408 downward. When the bottom of the second sealing strip 408 moves to the first sealing strip 407, the first sealing strip 407 can block the second sealing strip 408 to prevent the second sealing strip 408 from continuing to fall. The moving block 40 drives the first circular groove 402 out of the guiding cavity 30, so that the first circular groove 402 moves to one side of the placing plate 404. At this time, the candies inside the first circular groove 402 roll downward along the bottom surface of the first circular groove 402, and fall on the surface of the placing plate 404 through the first circular groove 402 to take out the candies. At this time, the end of the moving block 40 blocks the second circular groove 405 and seals the second circular groove 405, which can prevent gas from passing through the interior of the packaging can 20. At the same time, when the moving block 40 is pulled downward, the gas inside the packaging can 20 can be guided into the interior of the guiding cavity 30, reducing the gas inside the packaging can 20, creating a negative pressure inside the packaging can 20, and making the state of the candies more stable.

[0031] Working principle: When using this packaging structure to prevent pure honey candies from deforming at high temperatures, a heat insulation layer 201, a nitrogen storage tank 202, a pipeline 203, and an electromagnetic valve 204 are provided, which facilitate filling nitrogen into the interior of the packaging can 20 and reducing the high temperature inside the packaging can 20. The second circular groove 405, the airbag 406, the first sealing strip 407, and the second sealing strip 408 are provided to facilitate taking out the candies, creating a vacuum inside the packaging can 20, and increasing the overall practicality.

[0032] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A packaging structure for preventing pure honey candy from being deformed at high temperature, comprising a base (10), a packaging can (20) being mounted on the surface of the base (10), and a guide cavity (30) being embedded in the bottom surface of the packaging can (20); Features: The packaging tank (20) is provided with a sealing mechanism inside, and the sealing mechanism comprises: a heat insulation layer (201) is installed on the outer side of the packaging tank (20), a nitrogen storage tank (202) is installed on the surface of the packaging tank (20), a pipeline (203) is connected to the surface of the nitrogen storage tank (202), and a solenoid valve (204) is connected to the surface of the pipeline (203), a drainage chamber (205) is installed on the inner surface of the guide chamber (30), an exhaust pipe (206) is arranged around the surface of the drainage chamber (205), and the exhaust pipe (206) ) penetrates the surface of the guide cavity (30), the end of the pipe (203) is inserted into the packaging tank (20) and connected to the guide cavity (30) and the surface of the drainage cavity (205), a nitrogen sensor (207) is installed on the inner surface of the packaging tank (20), a moving block (40) is slidably installed inside the guide cavity (30), a circular groove (402) is embedded in the surface of the moving block (40), and a placement groove (403) is provided on the surface of the moving block (40), and a placement plate (404) is fixedly connected to the bottom of the packaging tank (20).

2. A packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 1, characterized in that: A sliding structure is provided inside the guide cavity (30), and the sliding structure comprises: a second circular groove (405) is embedded in the surface of the guide cavity (30), an air bag (406) is installed on the inner surface of the guide cavity (30), a sealing strip (407) is installed around the inner wall of the guide cavity (30), and a second sealing strip (408) is installed around the surface of the moving block (40).

3. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 1, characterized in that: The bottom of the packaging can (20) is arranged to be a semicircular structure, and the bottom of the guide cavity (30) is arranged to be open, and the bottom of the guide cavity (30) is embedded and fixedly arranged on the bottom surface of the packaging can (20).

4. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 1, characterized in that: The drainage cavity (205) is installed on the top of the guide cavity (30), and the guide cavity (30) is configured as a cylindrical structure.

5. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 2, characterized in that: The surface of the guide cavity (30) is provided with an opening, and the end surface of the airbag (406) is embedded in the opening of the guide cavity (30), and the airbag (406) is arranged at the bottom of the drainage cavity (205).

6. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 1, characterized in that: The moving block (40) is configured as a cylindrical structure, and the moving block (40) is embedded in the bottom opening of the guide cavity (30). The guide cavity (30) and the moving block (40) are slidably connected, and the moving block (40) is arranged outside the guide cavity (30).

7. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 2, characterized in that: The end of the moving block (40) is arranged corresponding to the position of the airbag (406), and the airbag (406) is arranged as a cylindrical structure.

8. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 1, characterized in that: The circular groove one (402) is arranged inside the placement groove (403), and the section of the placement groove (403) is arranged as an inclined plane, and the circular groove one (402) is arranged at the bottom end of the placement groove (403), and the circular groove one (402) is arranged corresponding to the position of the placement plate (404).

9. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 2, characterized in that: The second circular groove (405) is arranged in a position corresponding to the first circular groove (402), and a slide groove is embedded in the bottom of the packaging can (20), the second circular groove (405) is arranged at the end of the slide groove of the packaging can (20), and the second circular groove (405) is arranged in a position corresponding to the slide groove of the packaging can (20), and the end of the moving block (40) is arranged in a position corresponding to the position of the second circular groove (405).

10. The packaging structure for preventing pure honey candy from being deformed at high temperature according to claim 2, characterized in that: The sealing strip 1 (407) is arranged at the opening of the guide cavity (30), and the sealing strip 1 (407) is arranged at the bottom of the sealing strip 2 (408). The sealing strip 1 (407) is in contact with the surface of the moving block (40), and the moving block (40) and the sealing strip 1 (407) are in sliding connection. The end of the sealing strip 2 (408) is in contact with the inner wall of the guide cavity (30), and the guide cavity (30) and the sealing strip 2 (408) are in sliding connection.

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