Leak-proof chemical storage tank

Abstract

The utility model relates to the technical field of chemical equipment, and discloses a leakproof chemical storage tank which comprises a supporting and fixing frame, a storage tank feeding leakproof part and a storage tank automatic exhaust part, and supporting rods are fixedly installed at the top of the supporting and fixing frame at equal intervals. The sealing block is tightly connected with the feeding through pipe, chemical raw materials can be effectively prevented from leaking from the connecting position in the feeding process, the sealing plug, the sealing sleeve and the sealing ring form a multiple sealing system, when the chemical raw materials enter the feeding through pipe through the feeding connector, the pressure of the raw materials can act on the sealing plug, and the chemical raw materials are prevented from leaking. At the moment, the spring can be compressed or stretched according to the magnitude of the pressure, so that the position of the sealing plug can be adaptively adjusted, and when the feeding pressure is relatively low, the elastic force of the spring can keep the sealing plug in a tight fit state, so that external air is prevented from entering the tank body; when the feeding pressure is high, the spring is compressed, the sealing plug moves downwards, and enough channels are provided for the chemical raw materials to enter the tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a leakage-proof chemical storage tank. Background Art

[0002] In the chemical industry, chemical storage tanks are important equipment for storing various chemicals. However, existing chemical storage tanks often have the risk of leakage during use, which not only causes chemical waste but also poses a serious threat to the environment and personnel safety.

[0003] During the feeding process, the sealing structure of the feed port of traditional chemical storage tanks may not be perfect, which can easily lead to chemical raw material leakage due to poor sealing. For example, during feeding, factors such as pressure changes and vibration may cause the connection between the feed port and the feed pipe to loosen, causing leakage. In addition, during the storage process, the chemical raw materials inside the chemical storage tank may generate gas due to factors such as temperature changes. Without an effective exhaust device, the pressure in the tank will gradually increase, increasing the risk of the storage tank rupture or leakage. Utility Model Content

[0004] The purpose of the utility model is to provide a leak-proof chemical storage tank to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a leakage-proof chemical storage tank, comprising a supporting and fixing frame, a storage tank feed leakage-proof part, and a storage tank automatic exhaust part, wherein support rods are fixedly installed at equal intervals on the top of the supporting and fixing frame, and a fixed protective frame is fixedly installed on the top of the support rods; the storage tank feed leakage-proof part is arranged inside the supporting and fixing frame; and the storage tank automatic exhaust part is connected and arranged on the top of the storage tank feed leakage-proof part.

[0006] Preferably, the storage tank feed leakage prevention part specifically includes: a tank shell, fixedly mounted on the inside of the support fixing frame; a tank-in-tank tank, fixedly mounted on the inside of the tank shell; a sealing block, fixedly mounted on the inner wall of the tank-in-tank tank, and a tank-in-tank tank is provided. The combination of the tank-in-tank tank and the tank shell forms a double protection. When the outer tank shell is affected by impact, corrosion and other factors, the inner tank can still maintain relatively independent integrity, greatly reducing the risk of leakage of chemical substances. For example, during transportation or storage, if the tank shell is accidentally scratched or collided, the inner tank can better resist external impact and prevent leakage of chemical substances due to the protection of the outer layer.

[0007] Preferably, a mounting cavity is defined between the outer shell of the tank body and the inner tank of the tank body, a protective spacer is fixedly installed inside the mounting cavity, circular grooves are defined on the protective spacer at equal intervals around the circumference, and anti-collision hollow tubes are fixedly installed inside the circular grooves. A feed through-tube is provided on the top of the sealing block, and a protective spacer is provided. The protective spacer is installed in the mounting cavity between the outer shell of the tank body and the inner tank of the tank body. When the storage tank is subjected to external impact, the protective spacer can disperse the impact force in different directions. For example, if the storage tank collides during transportation, the protective spacer can disperse the impact force to the surrounding outer shell of the tank body and the inner tank of the tank body, thereby preventing localized excessive force from causing deformation or rupture of the tank body.

[0008] Preferably, a sliding sleeve is fixedly installed on the top of the feed pipe, the sliding sleeve is connected to the feed pipe, the inside of the sliding sleeve is slidably connected to a slide, the top of the slide is connected to a feed interface, and fixed blocks are fixedly installed at equal intervals on the bottom circumference of the slide, push rods are fixedly installed between the fixed blocks, and sealing plugs are fixedly installed on the push rods, and a sealing sleeve is provided on the outer wall of the sealing plug.

[0009] Preferably, the outer walls of the sealing plug and the sealing sleeve are equidistantly provided with sealing rings, the sealing sleeve is fixedly mounted on the inner wall of the feed pipe, the inner wall of the feed pipe is fixedly mounted with a fixing frame, and the bottom circumference of the sealing plug is equidistantly fixed with positioning rods, and the other end of the positioning rods is movable through the top of the fixing frame and extends to the bottom of the fixing frame.

[0010] Preferably, the bottom of the sealing plug is fixedly connected to a sliding rod, the top of the fixing frame is fixedly installed with a positioning sleeve, the other end of the sliding rod is movable through the top of the fixing frame through the positioning sleeve, and extends to the bottom of the fixing frame; the other end of the sliding rod is fixedly installed with a limiting plate, the outer wall sleeve of the sliding rod is provided with a spring, one end of the spring is fixedly connected to the bottom of the sealing plug, and the other end of the spring is fixedly connected to the top of the fixing frame.

[0011] Preferably, the automatic exhaust part of the storage tank specifically includes: an exhaust pipe, which is arranged on the top of the sealing block; one end of the exhaust pipe is movable through the top of the sealing block and extends to the inside of the tank inside the tank body; a fixed sealing block is fixedly installed inside the exhaust pipe, and an exhaust hole is opened on the fixed sealing block; an exhaust head is provided on the top of the fixed sealing block, and an exhaust pipe is provided. When the chemical substances in the chemical storage tank generate gas due to temperature changes and other reasons, causing the pressure to rise, the exhaust pipe can discharge the excess gas in time. By cooperating with components such as the fixed sealing block and the suspended valve core, the exhaust channel is automatically opened when the pressure reaches a certain level, avoiding safety accidents such as the rupture or leakage of the storage tank caused by excessive pressure in the tank, thereby providing reliable safety protection for chemical storage.

[0012] Preferably, the exhaust head is connected to the fixed sealing block through the exhaust hole, the inner wall of the exhaust pipe is fixedly installed with a support frame, the top circumference of the support frame is equidistantly fixed with a guide rod, the other end of the guide rod is fixedly connected to the bottom outer wall of the fixed sealing block, the outer wall of the guide rod is movably sleeved with a floating valve core, the top of the floating valve core is fixedly installed with a sealing block, the sealing block is adapted to the exhaust hole, the top of the sealing block is fixedly installed with a connecting rod, the connecting rod extends to the top of the fixed sealing block through the exhaust head, the outer wall fixed sleeve of the connecting rod is provided with an air plug, the air plug is adapted to the exhaust head, the top of the connecting rod is fixedly installed with a fixed round block, the outer wall of the connecting rod is provided with an exhaust spring, one end of the exhaust spring is fixedly connected to the fixed round block, and the other end of the exhaust spring is fixedly connected to the fixed sealing block.

[0013] The utility model provides a leak-proof chemical storage tank, which has the following beneficial effects:

[0014] (1) The utility model can effectively prevent chemical raw materials from leaking from the connection during feeding by tightly connecting the sealing block with the feed pipe. The sealing plug, sealing sleeve and sealing ring constitute a multiple sealing system. When the chemical raw materials enter the feed pipe through the feed interface, the pressure of the raw materials will act on the sealing plug. At this time, the spring will be compressed or stretched according to the size of the pressure, so that the sealing plug can adjust its position adaptively. When the feed pressure is low, the elastic force of the spring can keep the sealing plug in a tight fit to prevent external air from entering the tank body; when the feed pressure is high, the spring will be compressed and the sealing plug will move downward, providing a sufficient channel for the chemical raw materials to enter the tank body.

[0015] (2) The utility model can quickly respond to the pressure increase caused by the chemical raw materials in the tank due to temperature changes, chemical reactions and other factors. The automatic exhaust part of the storage tank can respond quickly. The floating valve core can sense the pressure change very sensitively. Once the pressure reaches the set opening value, the floating valve core will immediately move upward under the action of the air pressure to overcome the elastic force of the exhaust spring. Through the coordinated action of the floating valve core, sealing block, gas plug and other components, the exhaust volume can be controlled. As the pressure in the tank changes, the displacement of the floating valve core will also change accordingly, thereby adjusting the opening degree of the exhaust hole and the exhaust head to ensure that the pressure in the tank is always maintained within a safe range. For example, when the pressure rises slightly, the exhaust hole and the exhaust head will only open to a small extent and slowly release a small amount of gas; when the pressure rises sharply, they will open to a greater extent and quickly discharge a large amount of gas. Under normal circumstances, the sealing block fits tightly with the exhaust hole, and the gas plug and the exhaust head are also in a sealed state, effectively preventing the gas in the tank from leaking. This double sealing structure greatly improves the reliability of the exhaust part and ensures the sealing of the chemical storage tank even during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front perspective view of the overall structure of the utility model;

[0017] Figure 2 This is a partial view of the feed leakage prevention part of the storage tank of the utility model;

[0018] Figure 3 This is a partial view of the feed pipe of the utility model;

[0019] Figure 4 This is a partial view of the automatic exhaust part of the storage tank of the utility model.

[0020] In the figure: 1 supporting frame, 2 supporting rod, 3 storage tank feed anti-leakage part, 311 tank shell, 312 tank body, 313 installation cavity, 314 protective spacer, 315 anti-collision empty pipe, 316 sealing block, 317 feed through pipe, 318 sliding sleeve, 319 slide plate, 3111 feed interface, 3112 fixing block, 3113 push rod, 3114 sealing sleeve, 3115 sealing ring, 3116 sealing plug, 3117 spring, 3118 sliding rod, 3119 positioning rod, 31111 fixing frame, 4 storage tank automatic exhaust part, 411 exhaust pipe, 412 fixed sealing block, 413 exhaust head, 414 guide rod, 415 sealing block, 416 floating valve core, 417 supporting frame, 418 connecting rod, 419 fixed round block, 4111 air plug. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Example 1:

[0023] The preferred embodiment of the leak-proof chemical storage tank provided by the present invention is as follows: Figure 1-4As shown: A leak-proof chemical storage tank, including a supporting frame 1, a storage tank feed leak-proof part 3, and a storage tank automatic exhaust part 4. Support rods 2 are fixedly installed at equal intervals on the top of the supporting frame 1, and a fixed protective frame is fixedly installed on the top of the support rods 2; the storage tank feed leak-proof part 3 is arranged inside the supporting frame 1; the storage tank automatic exhaust part 4 is connected and arranged on the top of the storage tank feed leak-proof part 3.

[0024] The storage tank feed leakage prevention part 3 specifically includes: a tank shell 311, fixedly installed inside the support bracket 1; a tank inner tank 312, fixedly installed inside the tank shell 311; and a sealing block 316, fixedly installed on the inner wall of the tank inner tank 312.

[0025] An installation cavity 313 is provided between the tank shell 311 and the tank body 312. A protective spacer 314 is fixedly installed inside the installation cavity 313. Circular grooves are equidistantly provided on the circumference of the protective spacer 314. An anti-collision air tube 315 is fixedly installed inside the circular groove. A feed pipe 317 is provided on the top of the sealing block 316.

[0026] A sliding sleeve 318 is fixedly installed on the top of the feed pipe 317, and the sliding sleeve 318 is connected to the feed pipe 317. The inside of the sliding sleeve 318 is slidably connected to the slide plate 319, and the top of the slide plate 319 is connected to the feed interface 3111. Fixed blocks 3112 are fixedly installed at equal intervals on the bottom circumference of the slide plate 319, and push rods 3113 are fixedly installed between the fixed blocks 3112. The push rods 3113 are fixedly installed with sealing plugs 3116, and the outer wall of the sealing plug 3116 is provided with a sealing sleeve 3114.

[0027] Sealing rings 3115 are equidistantly mounted on the outer walls of the sealing plug 3116 and the sealing sleeve 3114. The sealing sleeve 3114 is fixedly mounted on the inner wall of the feed pipe 317. A fixing frame 31111 is fixedly mounted on the inner wall of the feed pipe 317. Positioning rods 3119 are equidistantly fixedly mounted on the bottom circumference of the sealing plug 3116. The other end of the positioning rod 3119 is movable through the top of the fixing frame 31111 and extends to the bottom of the fixing frame 31111.

[0028] The bottom of the sealing plug 3116 is fixedly connected to a sliding rod 3118, and the top of the fixing frame 31111 is fixedly installed with a positioning sleeve. The other end of the sliding rod 3118 passes through the top of the fixing frame 31111 through the positioning sleeve and extends to the bottom of the fixing frame 31111; the other end of the sliding rod 3118 is fixedly installed with a limiting plate, and the outer wall of the sliding rod 3118 is provided with a spring 3117, one end of the spring 3117 is fixedly connected to the bottom of the sealing plug 3116, and the other end of the spring 3117 is fixedly connected to the top of the fixing frame 31111.

[0029] In the process of this embodiment, when chemical raw materials need to be injected into the chemical storage tank, the delivery pipeline is connected to the feed interface 3111, and the chemical raw materials enter the slide plate 319 through the feed interface 3111, and then flow into the sliding sleeve 318. The pressure of the chemical raw materials pushes the slide plate 319 to move downward, and the slide plate 319 drives the fixed block 3112 and the push rod 3113 to move downward. The push rod 3113 pushes the sealing plug 3116 to move downward, compressing the spring 3117. The sealing plug 3116 moves downward with the sealing sleeve 3114 and the sealing ring 3115, opening the feed pipe 317, so that the chemical raw materials can flow smoothly into the tank body. As the chemical raw materials are continuously injected into the inner tank 312, the pressure inside the inner tank 312 gradually increases. However, due to the sealing effect of the sealing plug 3116 and the sealing sleeve 3114, the chemical raw materials will not leak out of the feed pipe 317. When the feeding is completed, the connection between the delivery pipeline and the feed interface 3111 is disconnected. Under the elastic force of the spring 3117, the sealing plug 3116 moves upward and returns to its initial position, resealing the feed pipe 317 to prevent the chemical raw materials from leaking. At this time, the spring will compress or expand according to the pressure, allowing the sealing plug to adaptively adjust its position to balance the feed pressure. When the feed pressure is low, the elastic force of the spring can keep the sealing plug in a tight fit, preventing external air from entering the inner tank. When the feed pressure is high, the spring will be compressed, and the sealing plug will move downward, providing sufficient passage for the chemical raw materials to enter the inner tank, while still maintaining a certain sealing performance to prevent leakage. This adaptive adjustment function allows the storage tank to adapt to changes in different feed pressures, ensuring good leakage prevention under various working conditions. Example 2:

[0030] On the basis of the first embodiment, the present invention provides a leak-proof chemical storage tank. Figure 1-4 As shown: the automatic exhaust part 4 of the storage tank specifically includes: an exhaust pipe 411, which is arranged on the top of the sealing block 316; one end of the exhaust pipe 411 movably passes through the top of the sealing block 316 and extends to the inside of the tank 312 in the tank body, and a fixed sealing block 412 is fixedly installed inside the exhaust pipe 411, an exhaust hole is opened on the fixed sealing block 412, and an exhaust head 413 is provided on the top of the fixed sealing block 412.

[0031] The exhaust head 413 is connected to the fixed sealing block 412 through the exhaust hole. The inner wall of the exhaust pipe 411 is fixedly installed with a support frame 417. The top circumference of the support frame 417 is fixedly installed with a guide rod 414 at equal intervals. The other end of the guide rod 414 is fixedly connected to the bottom outer wall of the fixed sealing block 412. The outer wall of the guide rod 414 is movably sleeved with a floating valve core 416. The top of the floating valve core 416 is fixedly installed with a sealing block 415. The sealing block 415 is adapted to the exhaust hole. The sealing block A connecting rod 418 is fixedly installed on the top of 415, and the connecting rod 418 extends to the top of the fixed sealing block 412 through the exhaust head 413. The outer wall of the connecting rod 418 is fixedly sleeved with an air plug 4111, and the air plug 4111 is adapted to the exhaust head 413. A fixed block 419 is fixedly installed on the top of the connecting rod 418, and an exhaust spring is provided on the outer wall of the connecting rod 418. One end of the exhaust spring is fixedly connected to the fixed block 419, and the other end of the exhaust spring is fixedly connected to the fixed sealing block 412.

[0032] During the process of this embodiment, temperature fluctuations and other factors may generate gas, causing the pressure inside the tank to increase. As the pressure inside the tank increases, the gas flows upward through the exhaust pipe 411. When the gas pressure reaches a certain level, the gas pushes the floating valve core 416 upward, which drives the sealing block 415 upward and disengages the exhaust hole in the fixed sealing block 412. At the same time, the connecting rod 418 at the top of the sealing block 415 also moves upward, driving the gas plug 4111 upward, opening the exhaust head 413. The gas is discharged from the tank through the exhaust hole and the exhaust head 413, thereby reducing the pressure inside the tank. Once the pressure reaches the set opening value, the floating valve core immediately moves upward under the action of the gas pressure, overcoming the elastic force of the exhaust spring. Through the coordinated action of the floating valve core, the sealing block, the gas plug, and other components, the exhaust volume can be controlled. As the pressure inside the tank changes, the displacement of the floating valve core also changes accordingly, thereby adjusting the opening degree of the exhaust hole and the exhaust head, ensuring that the pressure inside the tank is always maintained within a safe range.

[0033] Working principle: When it is necessary to inject chemical raw materials into the chemical storage tank, the conveying pipe is connected to the feed interface 3111, and the chemical raw materials enter the slide plate 319 through the feed interface 3111, and then flow into the sleeve 318. The pressure of the chemical raw materials pushes the slide plate 319 to move downward, and the slide plate 319 drives the fixed block 3112 and the push rod 3113 to move downward. The push rod 3113 pushes the sealing plug 3116 to move downward, compressing the spring 3117. The sealing plug 3116 moves downward with the sealing sleeve 3114 and the sealing ring 3115, opening the feed pipe 317, so that the chemical raw materials can flow smoothly into the tank 312 in the tank body. As the chemical raw materials are continuously injected, the pressure in the tank 312 in the tank body gradually increases, but due to the sealing effect of the sealing plug 3116 and the sealing sleeve 3114, the chemical raw materials will not leak out from the feed pipe 317. When the feeding is completed, the connection between the conveying pipe and the feed interface 3111 is disconnected. Under the elastic force of the spring 3117, the sealing plug 3116 moves upward When the pressure in the tank decreases, the connecting rod 418 drives the sealing block 415 and the gas plug 4111 to move downward and return to the initial position, closing the exhaust hole and the exhaust head 413 again to prevent gas leakage.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A leak-proof chemical storage tank, comprising a supporting frame (1), a storage tank feed leak-proof part (3), and a storage tank automatic exhaust part (4), characterized in that: Support rods (2) are fixedly installed at equal intervals on the top of the support fixing frame (1), and a fixed protective frame is fixedly installed on the top of the support rods (2); the storage tank feed leakage prevention part (3) is arranged inside the support fixing frame (1); and the storage tank automatic exhaust part (4) is connected and arranged on the top of the storage tank feed leakage prevention part (3).

2. A leak-proof chemical storage tank according to claim 1, characterized in that: The storage tank feed leakage prevention part (3) specifically includes: The tank shell (311) is fixedly mounted inside the support frame (1); The inner tank (312) is fixedly mounted inside the outer tank shell (311); The sealing block (316) is fixedly mounted on the inner wall of the tank (312) in the tank body.

3. The leak-proof chemical storage tank according to claim 2, characterized in that: An installation cavity (313) is provided between the tank shell (311) and the tank (312) within the tank body. A protective spacer (314) is fixedly installed inside the installation cavity (313). Circular grooves are provided on the protective spacer (314) at equal intervals around the circumference. Anti-collision hollow tubes (315) are fixedly installed inside the circular grooves. A feed pipe (317) is provided on the top of the sealing block (316).

4. The leak-proof chemical storage tank according to claim 3, characterized in that: A sliding sleeve (318) is fixedly installed on the top of the feed pipe (317), and the sliding sleeve (318) is connected to the feed pipe (317). A slide plate (319) is slidably connected inside the sliding sleeve (318), and a feed interface (3111) is provided on the top of the slide plate (319). Fixed blocks (3112) are fixedly installed at equal intervals on the bottom circumference of the slide plate (319), and push rods (3113) are fixedly installed between the fixed blocks (3112). A sealing plug (3116) is fixedly installed on the push rod (3113), and a sealing sleeve (3114) is provided on the outer wall of the sealing plug (3116).

5. The leak-proof chemical storage tank according to claim 4, characterized in that: The outer walls of the sealing plug (3116) and the sealing sleeve (3114) are both equidistantly sleeved with sealing rings (3115), the sealing sleeve (3114) is fixedly mounted on the inner wall of the feed pipe (317), the inner wall of the feed pipe (317) is fixedly mounted with a fixing frame (31111), and the bottom circumference of the sealing plug (3116) is equidistantly fixed with positioning rods (3119), the other end of the positioning rod (3119) movably passes through the top of the fixing frame (31111) and extends to the bottom of the fixing frame (31111).

6. The leak-proof chemical storage tank according to claim 5, characterized in that: The bottom of the sealing plug (3116) is fixedly connected to a sliding rod (3118), and the top of the fixing frame (31111) is fixedly installed with a positioning sleeve. The other end of the sliding rod (3118) is movably passed through the top of the fixing frame (31111) through the positioning sleeve and extends to the bottom of the fixing frame (31111); the other end of the sliding rod (3118) is fixedly installed with a limiting plate, and the outer wall of the sliding rod (3118) is provided with a spring (3117), one end of the spring (3117) is fixedly connected to the bottom of the sealing plug (3116), and the other end of the spring (3117) is fixedly connected to the top of the fixing frame (31111).

7. The leak-proof chemical storage tank according to claim 1, characterized in that: The automatic exhaust part (4) of the storage tank specifically includes: An exhaust pipe (411) is provided on top of the sealing block (316); One end of the exhaust pipe (411) movably passes through the top of the sealing block (316) and extends to the interior of the tank (312) in the tank body. A fixed sealing block (412) is fixedly installed inside the exhaust pipe (411). An exhaust hole is opened on the fixed sealing block (412). An exhaust head (413) is provided on the top of the fixed sealing block (412).

8. The leak-proof chemical storage tank according to claim 7, characterized in that: The exhaust head (413) is connected to the fixed sealing block (412) through the exhaust hole. A support frame (417) is fixedly installed on the inner wall of the exhaust pipe (411). Guide rods (414) are fixedly installed at equal intervals on the top circumference of the support frame (417). The other end of the guide rod (414) is fixedly connected to the bottom outer wall of the fixed sealing block (412). A floating valve core (416) is movably sleeved on the outer wall of the guide rod (414). A sealing block (415) is fixedly installed on the top of the floating valve core (416). The sealing block (415) is adapted to the exhaust hole. A connecting rod (418) is fixedly installed on the top of the connecting rod (415), and the connecting rod (418) extends to the top of the fixed sealing block (412) through the exhaust head (413). The outer wall of the connecting rod (418) is fixedly sleeved with an air plug (4111), and the air plug (4111) is adapted to the exhaust head (413). A fixed round block (419) is fixedly installed on the top of the connecting rod (418), and an exhaust spring is provided on the outer wall of the connecting rod (418), one end of the exhaust spring is fixedly connected to the fixed round block (419), and the other end of the exhaust spring is fixedly connected to the fixed sealing block (412).

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