Diesel generator with environmental protection

Abstract

This application relates to the field of generator equipment technology and discloses an environmentally friendly diesel generator, including a diesel generator body fixedly mounted on a base, two particulate filter housings connected to the exhaust port of the diesel generator body, and filter elements inside each housing. The inner cavities of the two cylinders are respectively connected to the two particulate filter housings. A positioning ring plate is fixedly installed inside each cylinder, and a bellows is fixedly connected to the top of the positioning ring plate. A sliding plate is fixedly connected to the top of the bellows, and a throttling orifice is formed on the sliding plate. When one particulate filter housing is backflushed, the other particulate filter housing is used to purify the exhaust gas discharged from the diesel generator body. The two particulate filter housings alternate between backflushing and purifying the exhaust gas, thereby ensuring that the filter elements in the two filter elements remain unobstructed, thus guaranteeing high-efficiency power generation of the diesel generator body.

Description

Technical Field

[0001] This application relates to the field of generator equipment technology, and in particular to an environmentally friendly diesel generator. Background Technology

[0002] As an indispensable emergency and backup power source in modern industrial and civil sectors, diesel generators are increasingly concerned about exhaust emissions generated during their operation. During combustion, diesel engines produce complex exhaust gases containing various pollutants such as nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The exhaust system of diesel generators integrates a highly efficient exhaust gas treatment device, which comprehensively purifies the exhaust gases through advanced technologies such as catalytic oxidation, particulate capture, and selective catalytic reduction to meet the prescribed emission standards. This has become an important aspect of the application of diesel generator sets.

[0003] After a period of use, existing diesel generator particulate filters require high-temperature oxidation to burn the carbon soot particles in the filter element and convert them into harmless carbon dioxide to restore the filter's filtration capacity. However, during the regeneration process, only combustible particles are removed, leaving behind non-combustible residues called ash. This ash cannot be discharged normally. Existing equipment generally uses backflushing airflow to blow out the ash clogged in the filter element. However, during the exhaust phase after backflushing, the ash easily flows back into the particulate filter element with the airflow, which affects the exhaust gas purification effect of the diesel generator and consequently affects the generator's power generation efficiency. Summary of the Invention

[0004] This application proposes an environmentally friendly diesel generator that possesses the advantages of continuous and high-efficiency power generation, thereby solving the technical problems existing in the use of current diesel generators.

[0005] To achieve the above objectives, this application adopts the following technical solution: an environmentally friendly diesel generator, comprising: The diesel generator body is fixedly installed on the base, and two particulate filter housings are connected to the exhaust port of the diesel generator body. Each of the two particulate filter housings has a filter element installed inside.

[0006] Two cylindrical bodies are connected to the outer shells of two particle traps. A positioning ring plate is fixedly installed inside the cylindrical body. A bellows is fixedly connected to the top of the positioning ring plate. A sliding plate is fixedly connected to the top of the bellows. A throttling orifice is opened on the sliding plate. A liquid guide pipe located above the positioning ring plate is connected to one side of the cylindrical body. A one-way valve is fixedly installed in the middle of the liquid guide pipe. The two ends of the liquid guide pipe are located above and below the sliding plate, respectively. Damping fluid is added to the cylindrical body above the positioning ring plate and outside the bellows.

[0007] The backflush pipeline assembly allows backflush airflow to be introduced to clean the filter elements inside the two particulate filter housings. While one particulate filter housing is being backflushed, the other particulate filter housing is used to purify the exhaust gas emitted by the diesel generator. The two particulate filter housings alternate between backflushing and exhaust gas purification.

[0008] Furthermore, the exhaust port of the diesel generator body is connected to a first three-way pipe, and the two ends of the first three-way pipe are respectively connected to a first electronic control valve. The ends of the two first electronic control valves away from the first three-way pipe are respectively connected to a second three-way pipe. The two second three-way pipes are respectively connected to two particulate filter housings. When one of the particulate filter housings is used for backflushing to clean the ash particles in the filter element, the first electronic control valve connected to the particulate filter housing is closed, and the backflushing airflow enters the particulate filter housing to backflush the filter element inside the particulate filter housing and clean the unburnable ash particles in the filter element. At the same time, the exhaust gas generated by the diesel generator body when generating electricity enters the other particulate filter housing through the first three-way pipe, and the filter element in the other particulate filter housing filters out the carbon soot particles in the exhaust gas.

[0009] Furthermore, the end of the second three-way pipe away from the first electronic control valve is connected to a duct pipe. A second electronic control valve is installed in the middle of the duct pipe. The end of the duct pipe away from the second three-way pipe is connected to the cylinder. The positioning ring plate is located above one end of the duct pipe opening. When the filter element inside one of the particulate trap shells is used to filter carbon soot particles in the exhaust gas, the second electronic control valve on the duct pipe connected to the particulate trap shell is in a closed state to ensure that the exhaust gas generated by the diesel generator body does not flow into the interior of the cylinder. The second electronic control valve on the duct pipe connected to the other particulate trap shell is opened, and in conjunction with the flow of the backflush airflow, the unburnable ash particles in the filter element are carried into the cylinder.

[0010] Furthermore, the backflush piping assembly includes two third tee pipes, which are fixedly installed at the top of the two particulate filter housings and connected to the two particulate filter housings respectively. A third electrically controlled valve is connected to the top of each of the two third tee pipes, and an exhaust duct is connected to the top of each of the two third electrically controlled valves. A fourth electrically controlled valve is connected to one side of each of the two third tee pipes, and a fourth tee pipe connects the two fourth electrically controlled valves. A backflush airflow duct is connected to the outside of the fourth tee pipe. When the filter element inside one of the particulate filter housings is used to filter carbon soot particles, the fourth electrically controlled valve connected to that particulate filter housing closes, and the third electrically controlled valve opens. The filtered exhaust gas is discharged through the exhaust duct at the top of that particulate filter housing. The fourth electrically controlled valve connected to the other particulate filter housing opens, and the third electrically controlled valve closes. Backflush airflow is introduced through the backflush airflow duct. The backflush airflow flows through the other particulate filter housing, thereby cleaning the ash in the filter element inside the other particulate filter housing.

[0011] Furthermore, heat dissipation fins are fixedly installed on the outer side of the cylinder. The heat dissipation fins conduct heat to dissipate heat from the inner cavity of the cylinder, preventing the temperature inside the cylinder from becoming too high and affecting the service life of the bellows.

[0012] Furthermore, a counterweight is fixedly installed on the top of the sliding plate. After the backflushing is completed, the sliding plate moves downward due to the gravity of the counterweight. The one-way flow setting of the one-way valve ensures that the damping fluid below the sliding plate can only flow upward through the throttling orifice, thereby controlling the sliding plate to move downward slowly.

[0013] Furthermore, a collection box is fixedly connected to the bottom end of the cylinder, and the inner cavity of the cylinder is connected to the inner cavity of the collection box. A door panel that blocks the door groove is fixedly installed on the collection box. By opening the door panel, the ash collected in the collection box can be cleaned out from the door groove.

[0014] Furthermore, a top cover is fixedly installed on the top of the cylinder, and a filling port is opened on the top cover. A sealing cap is fixedly installed on the top cover to block the filling port so that damping fluid can be added into the cylinder through the filling port.

[0015] Furthermore, the inner diameter of the corrugated pipe gradually increases from the bottom to the top. Utilizing the conical design of the corrugated pipe, during the exhaust and contraction stage, ash particles are intercepted in the grooves on the inner wall of the corrugated pipe, which reduces the amount of ash returning to the filter element with the exhaust airflow, further improving the backflushing cleaning effect of ash.

[0016] Furthermore, a hydraulic cylinder is fixedly installed on the top of the top cover. The piston shaft of the hydraulic cylinder is fixedly connected to the top of the sliding plate. After backflushing and cleaning the filter element inside the particle trap shell connected to the cylinder to remove ash, the sliding plate is slowly moved down to exhaust air by the hydraulic cylinder. A limiting ring plate is fixedly installed inside the cylinder, located below one end of the air guide pipe. The limiting ring plate has a through groove in the middle that communicates with the collection box, and the top of the limiting ring plate is a smooth slope. A valve ball for sealing the through groove is provided in the middle of the top of the limiting ring plate. A valve ball is provided between the valve ball and the positioning ring plate. A spring is present, and a wire is fixedly connected between the top of the valve ball and the bottom of the sliding plate. When the bellows is in its initial contracted state, the wire is in a relaxed state. The piston is driven by the hydraulic cylinder to push the sliding plate to move slowly downward to exhaust air, and some ash is intercepted in the groove on the inner wall of the bellows. After exhausting, the hydraulic cylinder is activated to drive the piston shaft to pull the sliding plate upward again until the bellows is straightened. The valve ball is pulled upward by the wire to open the through groove in the middle of the limiting ring plate. The ash in the groove on the inner wall of the wire falls down and falls into the inside of the collection box through the through hole in the middle of the limiting ring plate.

[0017] The beneficial effects of this invention are as follows: 1. The present application provides an environmentally friendly diesel generator, which is equipped with two particulate filter housings connected to the exhaust port of the diesel generator body. When one particulate filter housing is backflushed, the other particulate filter housing is used to purify the exhaust gas discharged from the diesel generator body. The two particulate filter housings alternate between backflushing and purifying the exhaust gas, so that the filter elements in the two filter elements can always remain unobstructed, thereby ensuring the high-efficiency power generation of the diesel generator body and avoiding pollution caused by the exhaust gas generated by the diesel generator body during power generation.

[0018] 2. The inner cavities of the two cylinders are connected to the outer shells of the two particulate filters respectively. The backflushing airflow carries the unburnable ash particles in the filter element into the cylinder and pushes the sliding plate in the cylinder upward. After the backflushing is completed, the throttling orifice on the sliding plate, together with the one-way flow setting of the one-way valve, allows the damping fluid below the sliding plate to flow upward through the throttling orifice. This controls the sliding plate to move downward slowly, slowly pressing out the backflushing gas in the bellows. This allows most of the ash in the bellows to fall under the action of gravity, avoiding the problem that the ash flows back into the filter element after the backflushing airflow, which would affect the cleaning effect. This improves the filter element's effect of filtering carbon soot particles in the exhaust gas of the diesel generator, and further ensures the long-term high-efficiency power generation of the diesel generator. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 for Figure 1 A cross-sectional view of the middle cylinder and the outer shell of the particle trap; Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 5 for Figure 4 A cross-sectional view of the middle cylinder and the outer shell of the particle trap; Figure 6 for Figure 3 A magnified schematic diagram of the structure at point B.

[0020] In the diagram: 1. Base; 2. Diesel generator body; 3. First tee pipe; 4. First electronic control valve; 5. Second tee pipe; 6. Particulate filter housing; 7. Filter element; 8. Air guide pipe; 9. Second electronic control valve; 10. Cylinder; 11. Positioning ring plate; 12. Bellows; 13. Sliding plate; 131. Throttling orifice; 14. Counterweight; 15. Top cover; 16. Sealing cover; 17. Liquid guide pipe; 18. Check valve; 19. Collection box; 20. Third tee pipe; 21. Third electronic control valve; 22. Exhaust duct; 23. Fourth electronic control valve; 24. Fourth tee pipe; 25. Backflush airflow duct; 26. Door panel; 27. Hydraulic cylinder; 28. Limiting ring plate; 29. ​​Valve ball; 30. Spring; 31. Wire. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0022] Example 1, as Figures 1-3An environmentally friendly diesel generator includes a base 1, with a diesel generator body 2 fixedly mounted on the top of the base 1. The exhaust port of the diesel generator body 2 is connected to a first three-way pipe 3. The two ends of the first three-way pipe 3 are respectively connected to first electronically controlled valves 4. The ends of the two first electronically controlled valves 4 away from the first three-way pipe 3 are respectively connected to second three-way pipes 5. The top ends of the two second three-way pipes 5 are respectively connected to particulate filter housings 6. The interiors of the two particulate filter housings 6 are respectively equipped with filter elements 7. When the diesel generator body 2 is started to generate electricity, one of the first electronically controlled valves 4 is opened and the other first electronically controlled valve 4 is closed. The exhaust gas discharged from the diesel generator body 2 enters the interior of one of the particulate filter housings 6 through one of the first electronically controlled valves 4 and the second three-way pipe 5. The filter element 7 inside the particulate filter housing 6 filters out carbon soot particles in the exhaust gas. Furthermore, through the high-load operation of the diesel generator body 2, the exhaust temperature is increased, and the carbon soot particles captured by the filter element 7 are burned and converted into harmless carbon dioxide.

[0023] Two second three-way pipes 5 are connected to air guide pipes 8 at their ends furthest from the first solenoid valve 4. A second solenoid valve 9 is installed in the middle of each air guide pipe 8. Two cylinders 10 are connected to their ends furthest from the second three-way pipes 5. Positioning ring plates 11 are fixedly installed inside each of the two cylinders 10. The positioning ring plates 11 are located above the opening of one end of the air guide pipe 8 and are close to the opening of the air guide pipe 8. A bellows 12, made of high-temperature resistant metal, is fixedly installed on the top of each of the two bellows 12. Sliding plates 13 are fixedly installed on the top of each of the two bellows 12. The outer side of the sliding plates 13 is movably sleeved with the inner wall of the cylinder 10. Throttling orifices are provided on the sliding plates 13. 131, and a counterweight 14 is fixedly installed on the top of the sliding plate 13, and a top cover 15 is fixedly installed on the top of the cylinder 10. A filling port is provided on the top cover 15, through which damping fluid is added to the inside of the cylinder 10. The damping fluid can be water or damping oil. Heat dissipation fins are also fixedly installed on the outside of the cylinder 10 to dissipate heat and cool the inside of the cylinder 10. A sealing cap 16 is fixedly installed on the top cover 15 to block the filling port. A liquid guide pipe 17 located above the positioning ring plate 11 is connected to one side of the cylinder 10. The bottom end of the liquid guide pipe 17 is located between the sliding plate 13 and the positioning ring plate 11, and the top end of the liquid guide pipe 17 is close to the top cover 15. A one-way valve 18 is fixedly installed in the middle of the liquid guide pipe 17.

[0024] When the exhaust gas emitted by the diesel generator body 2 during power generation enters one of the particulate filter housings 6, and is filtered by the filter element 7 inside the particulate filter housing 6 to remove carbon soot particles from the exhaust gas, the second electronically controlled valve 9 connected to the particulate filter housing 6 is closed, and the second electronically controlled valve 9 connected to the other particulate filter housing 6 is open, spraying a pulse airflow into the other particulate filter housing 6 to clean the non-combustible residue ash in the filter element 7 inside the particulate filter housing 6. The backflushing airflow carrying the ash enters the interior of the cylinder 10 and the bellows 12 through the air guide pipe 8, and pushes the sliding plate 13 upward. At this time, the damping fluid above the sliding plate 13 flows downward through the liquid guide pipe 17 and the one-way valve 18. After the backflushing is completed, the gravity of the counterweight 14 drives the sliding plate 13 downward. Utilizing the one-way flow setting of the one-way valve 18, the damping fluid below the sliding plate 13 is reduced. The liquid can only flow upward through the throttling orifice 131, thereby controlling the sliding plate 13 to move downward slowly. The bottom end of the cylinder 10 is fixedly connected to the collection box 19, and the inner cavity of the cylinder 10 is connected to the inner cavity of the collection box 19. When the sliding plate 13 moves downward slowly, the backflush gas in the bellows 12 is slowly pushed out. Most of the ash in the bellows 12 falls into the inside of the collection box 19 under the action of gravity, thereby avoiding the problem that the ash flows back into the filter element 7 after backflushing and affects the cleaning effect. The filter elements 7 in the two particle trap housings 6 filter carbon soot particles and backflush to clean the blockage, thereby ensuring the long-term high-efficiency power generation of the diesel generator body 2. A door groove is opened at the bottom of one side of the collection box 19, and a door plate 26 is fixedly installed on the collection box 19 to block the door groove. By opening the door plate 26, the ash collected in the collection box 19 can be cleaned out from the door groove.

[0025] The top ends of the two particulate filter housings 6 are respectively connected to third three-way pipes 20, the top ends of the two third three-way pipes 20 are respectively connected to third electrically controlled valves 21, the top ends of the two third electrically controlled valves 21 are respectively connected to exhaust ducts 22, one side of each of the two third three-way pipes 20 is respectively connected to a fourth electrically controlled valve 23, a fourth three-way pipe 24 is connected between the two fourth electrically controlled valves 23, and the outside of the fourth three-way pipe 24 is connected to a backflush airflow duct 25. When the filter element 7 inside one of the particulate filter housings 6 is used for... When carbon soot particles are filtered out, the fourth solenoid valve 23 connected to the particulate filter housing 6 closes and the third solenoid valve 21 opens. The filtered exhaust gas is discharged through the exhaust duct 22 at the top of the particulate filter housing 6. The fourth solenoid valve 23 connected to another particulate filter housing 6 opens and the third solenoid valve 21 closes. Backflush airflow is introduced through the backflush airflow duct 25. The backflush airflow flows through the other particulate filter housing 6, thereby cleaning the ash in the filter element 7 inside the other particulate filter housing 6.

[0026] Example 2, as Figures 3-6An environmentally friendly diesel generator, based on Embodiment 1, differs from Embodiment 1 in its internal structure of the cylinder 10. Specifically, the inner diameter of the bellows 12 gradually increases from the bottom to the top. A hydraulic cylinder 27 is fixedly installed on the top of the top cover 15. The piston shaft of the hydraulic cylinder 27 is fixedly connected to the top of the sliding plate 13. After backflushing and cleaning the filter element 7 inside the particle trap shell 6 connected to the cylinder 10, the sliding plate 13 is slowly moved down to exhaust air by the hydraulic cylinder 27. At the same time, the conical design of the bellows 12 is utilized so that ash particles are intercepted in the grooves on the inner wall of the bellows 12 during the exhaust contraction stage. Compared with Embodiment 1, this further reduces the amount of ash returning to the filter element 7 with the exhaust airflow, further improving the backflushing and cleaning effect of ash.

[0027] Inside the cylinder 10, a limiting ring plate 28 is fixedly installed below one end of the air guide pipe 8. The limiting ring plate 28 has a through groove in the middle that communicates with the collection box 19, and the top of the limiting ring plate 28 is a smooth slope. A valve ball 29 for blocking the through groove is provided in the middle of the top of the limiting ring plate 28. A spring 30 is provided between the valve ball 29 and the positioning ring plate 11. A wire 31 is fixedly connected between the top of the valve ball 29 and the bottom of the sliding plate 13. When the bellows 12 is in the initial contracted state, the wire 31 is in the relaxed state. The spring 30 and the wire 31 are both made of high-temperature resistant metal.

[0028] During backflushing, the hydraulic cylinder 27 drives the piston shaft to pull the sliding plate 13 upward, stretching the bellows 12 and creating a negative pressure inside the bellows 12. This, combined with the inflow of backflushing air, enhances the effect of the backflushing airflow carrying ash into the cylinder 10. The air pressure entering the cylinder 10 through the air guide pipe 8 causes the valve ball 29 to adhere to the top of the through groove in the middle of the limiting ring plate 28, preventing the ash collected in the collection box 19 from being blown up again. The hydraulic cylinder 27 drives the piston to push the sliding plate 13 downward slowly to exhaust the air, and some ash is intercepted by the groove in the inner wall of the bellows 12. After exhausting the air, the hydraulic cylinder 27 drives the piston shaft to pull the sliding plate 13 upward again until the bellows 12 is straightened. The valve ball 29 is pulled upward by the wire 31 to open the through groove in the middle of the limiting ring plate 28, and the ash in the groove in the inner wall of the wire 31 falls down. The ash then falls into the collection box 19 through the through hole in the middle of the limiting ring plate 28.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmentally friendly diesel generator, characterized in that, include: The diesel generator body is fixedly installed on the base, and two particulate filter housings are connected to the exhaust port of the diesel generator body. The interior of each of the two particulate filter housings is equipped with a filter element. Two cylinders are provided, with their inner cavities connected to the outer shells of two particle traps respectively. A positioning ring plate is fixedly installed inside each cylinder, and a bellows is fixedly connected to the top of the positioning ring plate. A sliding plate is fixedly connected to the top of the bellows, and a throttling orifice is opened on the sliding plate. A liquid guide pipe located above the positioning ring plate is connected to one side of each cylinder. A one-way valve is fixedly installed in the middle of the liquid guide pipe, and the two ends of the liquid guide pipe are located above and below the sliding plate respectively. Damping fluid is added to the cylinder, located above the positioning ring plate and outside the bellows. The backflush pipeline assembly allows backflush airflow to be introduced to clean the filter elements inside the two particulate filter housings. While one particulate filter housing is being backflushed, the other particulate filter housing is used to purify the exhaust gas emitted by the diesel generator. The two particulate filter housings alternate between backflushing and exhaust gas purification.

2. The environmentally friendly diesel generator according to claim 1, characterized in that, The exhaust port of the diesel generator body is connected to a first three-way pipe. The two ends of the first three-way pipe are respectively connected to a first electronic control valve. The ends of the two first electronic control valves away from the first three-way pipe are respectively connected to a second three-way pipe. The two second three-way pipes are respectively connected to the outer shells of two particulate filters.

3. The environmentally friendly diesel generator according to claim 1, characterized in that, The end of the second three-way pipe away from the first solenoid valve is connected to a gas guide pipe. A second solenoid valve is installed in the middle of the gas guide pipe. The end of the gas guide pipe away from the second three-way pipe is connected to the cylinder body. The positioning ring plate is located above one end of the gas guide pipe opening.

4. The environmentally friendly diesel generator according to claim 1, characterized in that, The backflush piping assembly includes two third tee pipes, which are fixedly installed at the top of the housings of the two particulate traps and connected to the housings of the two particulate traps respectively. The top of each of the two third tee pipes is connected to a third electrically controlled valve, and the top of each of the two third electrically controlled valves is connected to an exhaust duct. A fourth electrically controlled valve is connected to one side of each of the two third tee pipes, and a fourth tee pipe is connected between the two fourth electrically controlled valves. A backflush airflow duct is connected to the outside of the fourth tee pipe.

5. The environmentally friendly diesel generator according to claim 1, characterized in that, Heat dissipation fins are fixedly installed on the outer side of the cylinder.

6. The environmentally friendly diesel generator according to claim 1, characterized in that, A counterweight is fixedly installed on the top of the sliding plate.

7. The diesel generator with environmental friendliness according to claim 1, characterized by, A collection box is fixedly connected to the bottom end of the cylinder, and the inner cavity of the cylinder is connected to the inner cavity of the collection box. A door panel for sealing the door groove is fixedly installed on the collection box.

8. The diesel generator with environmental friendliness according to claim 7, characterized by, A top cover is fixedly installed on the top of the cylinder, and a filling port is opened on the top cover. A sealing cap that blocks the filling port is fixedly installed on the top cover.

9. The diesel generator with environmental friendliness according to claim 8, characterized by, The inner diameter of the bellows gradually increases from the bottom to the top.

10. The environmentally friendly diesel generator according to claim 1, characterized in that, A hydraulic cylinder is fixedly installed on the top of the top cover. The piston shaft of the hydraulic cylinder is fixedly connected to the top of the sliding plate. A limiting ring plate is fixedly installed inside the cylinder, located below one end of the air guide pipe. A through groove communicating with the collection box is opened in the middle of the limiting ring plate, and the top of the limiting ring plate is a smooth slope. A valve ball for blocking the through groove is provided in the middle of the top of the limiting ring plate. A spring is provided between the valve ball and the positioning ring plate. A wire is fixedly connected between the top of the valve ball and the bottom of the sliding plate. When the bellows is in the initial contracted state, the wire is in the relaxed state.

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