Refining and recycling equipment for crude glycerine

Abstract

The invention discloses refining and recycling equipment for crude glycerine, and relates to the technical field of crude glycerine refining. According to the refining and recycling equipment for the crude glycerine, pressurized air can be quickly conveyed into a side connecting pipe through a condensation assembly and a hose, the air flow quickly flows in the side connecting pipe, and when the air flow makes contact with protruding threads, the heat exchange area can be increased, and heat absorbed by a condensation pipe is taken away; and then the gas subjected to heat exchange can be conveyed into the insertion pipe A through the insertion pipe B, and the gas subjected to heat exchange is conveyed into the injection cylinder B through the calandria, so that liquid cooling is conveniently avoided, subsequent cooling of the condensation pipe is facilitated, the heat exchange area in the condensation pipe can be increased through the cooling mode, and the heat exchange efficiency of the condensation pipe is improved. Therefore, the heat exchange efficiency is improved, and the condensation pipe can be rapidly cooled in an air cooling mode.

Description

Technical Field

[0001] This invention relates to the field of crude glycerol refining technology, specifically to a crude glycerol refining and recovery device. Background Technology

[0002] The process of producing refined glycerol from crude glycerol through vaporization and condensation is called glycerol distillation. Glycerol distillation equipment consists of a distillation tank, multiple condensers connected in series, and containers. It generally employs a batch or semi-continuous process. Glycerol is first vaporized under reduced pressure in the distillation tank, and then the glycerol vapor is condensed in stages in the condenser. The condenser can be an air condenser or a controlled water condenser. The product that meets the required concentration and purity is refined glycerol.

[0003] According to existing patent CN211585268U, a crude glycerol molecular distillation device for improving glycerol purity is disclosed. This device includes a distillation tank, an inlet pipe, and a first valve. The inlet pipe is welded to one side of the distillation tank, and the first valve is installed on the inlet pipe. A heat insulation block is installed inside the distillation tank, and a heating tube is embedded inside the heat insulation block. A heating wire is installed inside the heating tube, and the inner wall of the heating tube is formed with an arc shape. A connecting pipe is installed on the upper side of the inlet pipe, and a condenser is installed at the end of the connecting pipe away from the distillation tank. A cooling plate is inserted into the inner side of the condenser, and a cold water tank is formed inside the cooling plate. The condenser condenses the steam through a heat exchange tube. However, the steam condensation efficiency is low, and the purity of glycerol cannot be effectively improved. This invention addresses the problem by using a cooling plate and a cold water tank to increase the contact area between the glycerol steam and the cooling plate, thereby greatly improving the condensation efficiency of the condenser and effectively improving the purity of glycerol.

[0004] The existing condenser uses water cooling, but the inside of the cooling plate is prone to corrosion after long-term use, and the cold water tank needs to be cleaned. If it is not cleaned, it will deteriorate, which leads to a decrease in cooling efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a refining and recovery device for crude glycerin. Existing condensation methods use water cooling, but the interior of the cooling plate is prone to corrosion after prolonged use, and the cold water tank needs to be cleaned, otherwise it is prone to deterioration. This leads to a decrease in cooling efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a crude glycerol refining and recovery device, comprising a sleeve A, a drain pipe, a sealing ring, a sleeve b, and a handle. The drain pipe is fixedly installed on the other side of the sleeve A, the sealing ring is fixedly installed on the top of the sleeve A, the sleeve b is snapped into the inside of the sealing ring, the handle is fixedly installed on the top of the sleeve b, cooling components are provided on the sides of the sleeve A and the drain pipe, and a condensation component is provided inside the sleeve b.

[0007] Preferably, the cooling assembly includes an inlet pipe, an injection cylinder A, a push rod A, a telescopic motor, an injection cylinder B, a filter cylinder, and a support rod. The support rod is fixedly connected to one outer wall of the sleeve A, the telescopic motor is fixedly connected to the top of the support rod, the push rod A is movably connected to the other outer wall of the telescopic motor, and the push rod B is fixedly connected to the bottom of the push rod A. The outer walls of the push rod A and push rod B are movably fitted into the interiors of the injection cylinders A and B. The inlet pipe is fixedly installed on the top of the injection cylinder A, the filter cylinder is threaded onto the side of the injection cylinder B, and a one-way valve is fixedly installed on the top of the inlet pipe.

[0008] Preferably, the interior of the filter cartridge includes a collection chamber, an injection pipe, an discharge pipe, a connecting sleeve, a connecting rod, a sealing plug, a movable rod, a mounting block, and a spring. The connecting sleeve is threadedly installed inside the injection pipe. The connecting rod is fixedly installed inside the connecting sleeve. The movable rod is movably connected inside the connecting rod. The sealing plug is fixedly installed on one outer wall of the movable rod. The outer wall of the sealing plug is movably connected to the interior of the connecting sleeve.

[0009] Preferably, the condensation assembly includes a placement cavity, a condenser tube, a connector B, a side connecting pipe, a hose, and an absorption head. The sleeve B has a placement cavity inside, the condenser tube is fixedly installed inside the placement cavity, the hose is installed on the internal thread of the side connecting pipe, the absorption head is installed on the external thread of the hose, the condenser tube has a cavity inside, and the surface of the cavity has continuous raised threads.

[0010] Preferably, a cover plate is threaded onto the outer wall of the absorption head, and a drainage port is provided inside the circumference of the cover plate. The outer wall of the hose is threadedly connected to the side of the absorption head, and one end of the absorption head is twice the diameter of the other side of the absorption head.

[0011] Preferably, the sleeve A includes an internal sleeve opening, a storage cavity, an annular groove, a pipe, and a connector A. The storage cavity is formed inside the sleeve A, and an internal sleeve opening is formed at the bottom of one side of the storage cavity. An annular groove is formed inside the sealing ring. A pipe is fixedly installed on one side of the storage cavity, and a connector A is fixedly installed on the top of the other side of the pipe.

[0012] Preferably, the injection cylinder A includes an installation tube, a guide port, a rectangular block, a fixed tube, a telescopic rod, and a sealing block. The installation tube is fixedly installed on the other side of the injection cylinder A. The installation tube has a guide port inside. One side of the guide port is connected to the rectangular block. The fixed tube is fixedly connected to the top of the rectangular block. The telescopic rod is movably sleeved inside the fixed tube. The sealing block is fixedly installed at the bottom of the telescopic rod. The sealing block and the outer wall of the rectangular block are both rectangular.

[0013] Preferably, the injection cylinder B includes a limiting block, a movable shaft, and a sealing baffle. The limiting block is fixedly installed inside the other side of the injection cylinder B, the movable shaft is movably installed inside the limiting block, and the sealing baffle is fixedly connected to the outer wall of the movable shaft.

[0014] This invention provides a purification and recovery device for crude glycerol. Compared with the prior art, it has the following advantages:

[0015] 1. This crude glycerol refining and recovery equipment, through the cooling component, allows the compressed vapor to enter laterally and contact the condensing component. This enables the vapor to be transported quickly while increasing the contact area with the condensing component, allowing it to condense into liquid for easy subsequent collection. When the push rod A retracts inside the injection cylinder A, the thrust of the telescopic rod and the sealing block is canceled, and the sealing block moves back to its original position by its own mass. This creates a closed environment, preventing the vapor from flowing back through the guide port, and facilitating the rapid cooling of the distilled vapor, thus making it easier to collect and use.

[0016] 2. This crude glycerin refining and recovery equipment, through a condenser assembly, uses a hose to rapidly deliver pressurized air into the interior of the side connecting pipe. This airflow moves rapidly inside the side connecting pipe, and when it comes into contact with the raised threads, it increases the heat exchange area, allowing the heat absorbed by the condenser tube to be carried away. Then, through the insertion pipe B, the heat-exchanged gas can be delivered into the interior of the insertion pipe A, and through the discharge pipe, the heat-exchanged gas can be delivered into the interior of the injection cylinder B. This facilitates and avoids the need for liquid cooling, thus making subsequent cooling of the condenser tube easier. Moreover, the above cooling method can increase the heat exchange area inside the condenser tube, thereby increasing the heat exchange efficiency, allowing the condenser tube to be rapidly cooled by air cooling.

[0017] 3. This crude glycerol refining and recovery equipment uses a condensation component to deliver hot gas into the inside of the injection pipe, and then from the injection pipe into the inside of the filter cartridge. It should be noted that the inside of the filter cartridge can be filled with oil phase liquid, which allows the glycerol vapor mixed in the incoming hot gas to be separated and recovered. Afterwards, the gas passes through the oil phase liquid and is discharged directly from the inside of the discharge pipe, avoiding direct discharge and causing excessive absorption by the workers. This facilitates subsequent collection and also protects the workers. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall internal structure of the filter cartridge of the present invention;

[0020] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the overall structure at point A;

[0021] Figure 4 This is a schematic diagram of the overall structure of the injection cylinder A in this invention.

[0022] Figure 5 This is a schematic diagram of the overall structure of the sleeve b in this invention.

[0023] Figure 6 This is a schematic diagram of the overall structure of the sleeve A section of the present invention;

[0024] Figure 7 This is a schematic diagram of the overall structure of the absorption head of the present invention;

[0025] Figure 8 This is a schematic diagram of the overall structure of the injection cylinder B section of the present invention.

[0026] In the diagram: 1. Sleeve A; 2. Drain pipe; 3. Sealing ring; 4. Sleeve b; 5. Handle; 6. Absorption head; 7. Hose; 8. Injection cylinder A; 9. Inlet pipe; 10. Push rod A; 11. Telescopic motor; 12. Injection cylinder B; 13. Filter cylinder; 14. Support rod; 15. Push rod b; 101. Side opening; 102. Storage chamber; 103. Annular groove; 105. Pipeline; 106. Insertion pipe A; 401. Placement chamber; 402. Condenser pipe; 403. Insertion pipe B; 40 5. Side connecting pipe; 601. Cover plate; 602. Drainage port; 801. Mounting pipe; 802. Guide port; 803. Fixing pipe; 804. Telescopic rod; 805. Sealing block; 806. Rectangular block; 121. Limiting block; 122. Movable shaft; 123. Sealing baffle; 131. Collection chamber; 132. Injection pipe; 133. Discharge pipe; 134. Connecting sleeve; 135. Connecting rod; 136. Sealing plug; 137. Movable rod; 138. Mounting block; 139. Spring. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-8 This invention provides a technical solution: a crude glycerol refining and recovery device, comprising a sleeve A1, a drain pipe 2, a sealing ring 3, a sleeve b4, and a handle 5. The drain pipe 2 is fixedly installed on the other side of the sleeve A1, the sealing ring 3 is fixedly installed on the top of the sleeve A1, the sleeve b4 is snapped into the inside of the sealing ring 3, the handle 5 is fixedly installed on the top of the sleeve b4, cooling components are provided on the sides of the sleeve A1 and the drain pipe 2, and a condensation component is provided inside the sleeve b4.

[0029] The cooling assembly includes an inlet pipe 9, an injection cylinder A8, a push rod A10, a telescopic motor 11, an injection cylinder B12, a filter cylinder 13, and a support rod 14. The support rod 14 is fixedly connected to one side of the outer wall of the sleeve A1. The telescopic motor 11 is fixedly connected to the top of the support rod 14. The push rod A10 is movably connected to the other side of the outer wall of the telescopic motor 11. The push rod B15 is fixedly connected to the bottom of the push rod A10. The outer walls of the push rods A10 and B15 are movably sleeved with the interior of the injection cylinders A8 and B12. The inlet pipe 9 is fixedly installed on the top of the injection cylinder A8. The filter cylinder 13 is threaded onto the side of the injection cylinder B12. A one-way valve is fixedly installed on the top of the inlet pipe 9. The interior of the injection cylinder A8 includes an installation pipe 801. The filter cylinder A8 includes a guide port 802, a rectangular block 806, a fixed tube 803, a telescopic rod 804, a sealing block 805, and an installation tube 801 fixedly installed on the other side of the injection cylinder A8. A guide port 802 is opened inside the installation tube 801. A rectangular block 806 is connected to one side of the guide port 802. The fixed tube 803 is fixedly connected to the top of the rectangular block 806. The telescopic rod 804 is movably sleeved inside the fixed tube 803. The sealing block 805 is fixedly installed at the bottom of the telescopic rod 804. The sealing block 805 and the outer wall of the rectangular block 806 are both rectangular. The filter cylinder 13 includes a collection chamber 131, an injection tube 132, an discharge tube 133, a connecting sleeve 134, a connecting rod 135, a sealing plug 136, a movable rod 137, an installation block 138, and a spring 139. The inlet pipe 132 has an internal threaded connecting sleeve 134. A connecting rod 135 is fixedly installed inside the connecting sleeve 134. A movable rod 137 is movably connected inside the connecting rod 135. A sealing plug 136 is fixedly installed on one side of the outer wall of the movable rod 137. The outer wall of the sealing plug 136 is movably connected to the inside of the connecting sleeve 134. The injection cylinder B12 includes a limiting block 121. A movable shaft 122 is movably installed inside the limiting block 121. A sealing baffle 123 is fixedly connected to the outer wall of the movable shaft 122. First, the inlet pipe 9 is connected to the existing distillation mechanism. Then, the telescopic motor 11 is started, causing the push rods A10 and B15 connected to the side of the telescopic motor 11 to reciprocate inside the injection cylinders A8 and B12, respectively. During the outward extraction process of A10, a suction force is created inside the inlet pipe 9. This suction force draws the distilled vapor into the injection cylinder A8. As the push rod A10 extends into the injection cylinder A8, it compresses the vapor inside, causing it to enter the other side of the injection cylinder A8. Simultaneously, a one-way valve fixedly installed at the top of the inlet pipe 9 prevents the vapor from flowing back into the distillation mechanism. The vapor is pressurized under compression and enters the rectangular block 806, pushing the sealing block 805 upward. During this pushing process, the telescopic rod 804 retracts into the fixed pipe 803, connecting the guide port 802 with the interior of the rectangular block 806.This allows steam to be conveyed from inside the guide port 802 into the sleeve b4, enabling it to quickly enter the sleeve A1 and contact the condenser component inside the sleeve b4 for cooling. The compressed steam enters laterally and contacts the condenser component, increasing the contact area for rapid condensation and facilitating subsequent collection. As the push rod A10 retracts inside the injection cylinder A8, the thrust of the telescopic rod 804 and the sealing block 805 is released, and the sealing block 805 moves back to its original position using its own mass, creating a closed environment and preventing steam backflow through the guide port 802. It should be noted that the sides of the sleeve b4 and the sealing ring 3 can be customized with connection ports that fit the outer wall of the installation pipe 801. However, this type of opening is existing technology and is not shown in the figure.

[0030] The condenser assembly includes a placement cavity 401, a condenser tube 402, a connector B403, a side connecting tube 405, a hose 7, and an absorption head 6. The placement cavity 401 is located inside the sleeve B4, and the condenser tube 402 is fixedly installed inside the placement cavity 401. The hose 7 is threaded inside the side connecting tube 405, and the absorption head 6 is threaded on the outer wall of the hose 7. The condenser tube 402 has an internal cavity with continuous raised threads on its surface. The sleeve A1 includes an internal sleeve opening 101, a storage cavity 102, an annular groove 103, a manifold 105, and a connector A106. The storage cavity 102 is located inside the sleeve A1, with an internal sleeve opening 101 on one side of the bottom of the storage cavity 102. The sealing ring 3 has an annular groove 103 inside. A pipe 105 is fixedly installed on one side of the absorber head 6, and a connector A106 is fixedly installed on the top of the other side of the pipe 105. A cover plate 601 is threaded onto the outer wall of the absorber head 6. A drainage port 602 is opened inside the circumference of the cover plate 601. The outer wall of the hose 7 is threadedly connected to the side of the absorber head 6. One end of the absorber head 6 is twice the diameter of the other end of the absorber head 6. When the push rod b15 retracts, it allows the cover plate 601 to draw in external cold air through the drainage port 602. Because the drainage port 602 is small, the gas will be initially compressed during the absorption process, resulting in a first pressurization. When the gas flows out from the other side of the absorber head 6, the flow aperture becomes smaller, causing the airflow to be compressed a second time. The pressure will be increased twice. The pressurized air will be rapidly delivered into the side connecting pipe 405 via the hose 7. This airflow flows rapidly inside the side connecting pipe 405, increasing the heat exchange area when it contacts the raised threads, allowing the heat absorbed by the condenser tube 402 to be carried away. Then, the heat-exchanged gas can be delivered into the insert pipe A106 via the insertion pipe B403, and into the injection cylinder B12 via the discharge pipe 105. During its entry into the injection cylinder B12, the gas will push the sealing baffle 123, causing it to flip upwards. During this flipping, the movable shaft 122 fixedly connected to the top of the sealing baffle 123 will rotate, allowing it to flip. At this time, the airflow will rapidly enter the injection cylinder B12. As the push rod b15 extends into the injection cylinder B12, the airflow creates a reverse thrust on the sealing baffle 123, causing it to adhere tightly to the outer wall of the limiting block 121, thus preventing the hot airflow from flowing back. During the extension of the push rod b15, the airflow enters the connecting sleeve 134, pushing the sealing plug 136 forward. As it pushes, one side of the movable rod 137 extends out from inside the connecting sleeve 134, compressing the spring 139 movably sleeved on the other side of the movable rod 137. The compressed spring 139 generates a rebound force. When the sealing plug 136 extends out from inside the connecting sleeve 134, the side of the connecting sleeve 134 opens, allowing the hot airflow to enter the injection pipe 132.The gas is then introduced into the filter cartridge 13 through the injection pipe 132. It should be noted that the filter cartridge 13 can be filled with an oil phase liquid. This allows the glycerol vapor mixed with the incoming hot gas flow to be separated and recovered. The gas then passes through the oil phase liquid and is discharged directly from the discharge pipe 133, preventing excessive absorption by the workers. During the retraction of the push rod b15, the squeezing force of the spring 139 disappears, causing the spring 139 to reset. This reset pulls the sealing plug 136 back to its original position, preventing the oil phase liquid from flowing back.

[0031] Working principle: During operation, the bottom of the sleeve b4 and the annular groove 103 are first engaged, so that the bottom of the insertion tube B403 can be inserted into the inside of the insertion tube A106. Then, the top of the inlet pipe 9 is connected to the existing distillation mechanism. The telescopic motor 11 is started, so that the push rod A10 can draw in vapor through the inlet pipe 9. Then, the extension causes the vapor to be pressurized and quickly enter the inside of the sleeve b4, so that it can contact the condenser tube 402 and cool it quickly into liquid. During the back and forth movement of the push rod b15, the condenser tube 402 can be cooled. At the same time, the glycerol absorbed by the air can be separated into the inside of the collection chamber 131 for easy collection and use.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crude glycerol refining and recovery device, comprising a sleeve A (1), a liquid discharge pipe (2), a sealing ring (3), a sleeve b (4), and a handle (5), wherein the liquid discharge pipe (2) is fixedly mounted on the other side of the sleeve A (1), the sealing ring (3) is fixedly mounted on the top of the sleeve A (1), the sleeve b (4) is clamped inside the sealing ring (3), and the handle (5) is fixedly mounted on the top of the sleeve b (4), characterized in that: The sides of the sleeve A (1) and the drain pipe (2) are provided with cooling components; A condensation component is arranged inside the sleeve b (4).

2. The crude glycerol refining and recovery equipment according to claim 1, characterized in that: The cooling assembly comprises an inlet pipe (9), an injection barrel A (8), a push rod A (10), a telescopic motor (11), a telescopic motor (11), an injection barrel B (12), a filter barrel (13), and a support rod (14). The outer wall of one side of the sleeve A (1) is fixedly connected to the support rod (14), the top of the support rod (14) is fixedly connected to the telescopic motor (11), the outer wall of the other side of the telescopic motor (11) is movably connected to the push rod A (10), the bottom of the push rod A (10) is fixedly connected to the push rod b (15), the outer walls of the push rod A (10) and the push rod b (15) are movably sleeved inside the injection barrel A (8) and the injection barrel B (12), the top of the injection barrel A (8) is fixedly installed with the inlet pipe (9), the side of the injection barrel B (12) is threadedly installed with the filter barrel (13), and the top of the inlet pipe (9) is fixedly installed with a one-way valve.

3. The crude glycerol refining and recovery equipment according to claim 2, characterized in that: The interior of the filter cartridge (13) includes a collecting chamber (131), an injection pipe (132), a discharge pipe (133), a connecting sleeve (134), a connecting rod (135), a sealing plug (136), a movable rod (137), a mounting block (138), and a spring (139). The connecting sleeve (134) is threadedly mounted inside the injection pipe (132), the connecting rod (135) is fixedly mounted inside the connecting sleeve (134), the connecting rod (135) is movably sleeved inside the movable rod (137), a sealing plug (136) is fixedly mounted on an outer wall of one side of the movable rod (137), and the outer wall of the sealing plug (136) is movably sleeved inside the connecting sleeve (134).

4. The crude glycerol refining and recovery equipment according to claim 1, characterized in that: The condensation component includes a placement cavity (401), a condensation tube (402), a plug-in tube B (403), a side connecting tube (405), a hose (7), and an absorption head (6). The placement cavity (401) is opened inside the sleeve b (4), the condensation tube (402) is fixedly installed inside the placement cavity (401), the hose (7) is threadedly installed inside the side connecting tube (405), and the absorption head (6) is threadedly installed on the outer wall of the hose (7). The condensation tube (402) has a cavity opened inside, and the surface of the cavity has a continuous raised thread.

5. The crude glycerol refining and recovery equipment according to claim 4, characterized in that: The outer wall of the absorption head (6) is threadedly mounted with a cover plate (601), and a drainage port (602) is provided inside the circumference of the cover plate (601). The outer wall of the hose (7) is threadedly connected to the side of the absorption head (6), and one end of the absorption head (6) is twice the diameter of the inner port of the other side of the absorption head (6).

6. The crude glycerol refining and recovery equipment according to claim 1, characterized in that: The interior of the sleeve A (1) includes a built-in sleeve opening (101), a storage cavity (102), an annular groove (103), a pipe discharge (105), and a plug-in pipe A (106). The storage cavity (102) is provided inside the sleeve A (1), a built-in sleeve opening (101) is provided at the bottom of one side of the storage cavity (102), an annular groove (103) is provided inside the sealing ring (3), a pipe discharge (105) is fixedly installed on one side of the storage cavity (102), and a plug-in pipe A (106) is fixedly installed on the top of the other side of the pipe discharge (105).

7. The crude glycerol refining and recovery equipment according to claim 2, characterized in that: The injection tube A (8) comprises a mounting tube (801), a guide port (802), a rectangular block (806), a fixed tube (803), a telescopic rod (804), and a sealing block (805). The mounting tube (801) is fixedly mounted on the other side of the injection tube A (8). The mounting tube (801) is provided with a guide port (802) inside. One side of the guide port (802) is connected to the rectangular block (806). The top of the rectangular block (806) is fixedly connected to the fixed tube (803). The inside of the fixed tube (803) is movably connected to the telescopic rod (804). The sealing block (805) is fixedly mounted on the bottom of the telescopic rod (804). The shape of the sealing block (805) and the outer wall shape of the rectangular block (806) are both rectangular.

8. The crude glycerol refining and recovery equipment according to claim 2, characterized in that: The interior of the injection cylinder B (12) includes a limit block (121), a movable shaft (122), and a sealing baffle (123); the limit block (121) is fixedly installed inside the other side of the injection cylinder B (12); the movable shaft (122) is movably installed inside the limit block (121); and the outer wall of the movable shaft (122) is fixedly connected to the sealing baffle (123).

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