A three-proof integrated valve

Abstract

This utility model discloses a three-proof integrated valve, including a pneumatic control valve and a single H valve. Anti-loosening connectors are installed on the pre-selection valve inlet, pneumatic source inlet, first outlet, second outlet, and pre-selection valve outlet on the first and second valve bodies. Each anti-loosening connector includes a connector body and a one-way ferrule. The connector body includes a coaxially integrated insert positioning sleeve and a connecting sleeve. The one-way ferrule is installed inside the insert positioning sleeve and includes a fixing ring. Multiple spring arms are installed on the end face of the fixing ring. A pressing flange is integrally provided on the outer wall of the spring arm end, and locking teeth are provided on the inner wall of the spring arm corresponding to the pressing flange. Limiting support rings are installed at the ends of the first and second valve cores. The limiting support ring includes a coaxially integrated guide sleeve and a positioning pad ring. Multiple positioning cards are evenly spaced along the edge of the positioning pad ring. This integrated valve simultaneously has pneumatic shut-off function, high / low gear switching function, quick-connect pneumatic tube anti-loosening function, and three-proof function, resulting in a higher degree of product integration.

Description

Technical Field

[0001] This utility model belongs to the field of transmission technology and relates to an integrated valve, specifically a three-proof integrated valve. Background Technology

[0002] Currently, heavy-duty trucks all use dual intermediate shaft transmissions with a main and auxiliary gearbox structure. The auxiliary transmission relies on air valves to control the air circuit, switch between high and low gears, and protect the auxiliary gearbox synchronizer. The existing air circuit consists of an air circuit control valve and a single H valve. The air valves in the above air circuit have a simple product structure, single function, and low cost. However, they have design risks, a short product life, and cannot meet the three-proof functions. During use, they often experience jamming and air leakage, which causes great inconvenience to drivers. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a three-proof integrated valve that can solve the technical problems of existing integrated valves that cannot meet the three-proof function and are prone to jamming and air leakage.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A three-proof integrated valve includes an integrated air circuit control valve and a single H valve. The air circuit control valve includes a vertically arranged first valve body with a top cover installed at the top. A first cavity is vertically opened inside the first valve body. A pre-selection valve inlet and an air source inlet are symmetrically arranged on the side wall of the first valve body and are respectively connected to the first cavity. A propulsion channel is opened in the top cover and is coaxially arranged with the first cavity. A first valve core that can move along the first cavity is installed in the first cavity. A vent hole is opened on the side wall of the first valve core. A first sealing steel ball is pressed on the top of the first valve core. A first spring is installed in the first valve core. The top of the first spring contacts the first sealing steel ball. The bottom of the first spring abuts against the bottom of the first cavity. A push rod is installed in the propulsion channel. The bottom of the push rod contacts the first sealing steel ball. The top of the push rod extends out of the propulsion channel. The single H valve includes a second valve body that is laterally disposed below the first valve body. The second valve body is integrally disposed with the first valve body. A second cavity communicating with the first cavity is opened laterally inside the second valve body. A first air outlet, a second air outlet, a first exhaust port and a second exhaust port communicating with the second cavity are opened on the side wall of the second valve body. The first air outlet and the second air outlet are respectively connected to the auxiliary cylinder. The first exhaust port is connected to the first air outlet and the second exhaust port is connected to the second air outlet. The second valve body has a side cover installed at its lateral front end, and a pre-selection valve outlet is provided on the side cover. A piston is installed in the inner cavity of the side cover. The second valve body has a rear cover installed at its lateral rear end, and a plunger coaxially arranged with the second cavity is installed in the rear cover. A second valve core that can move along the second cavity is installed in the second cavity. A second sealing steel ball is pressed into the middle of the second valve core. Vent holes are provided on the side walls of the second valve core at both ends of the second sealing steel ball. A second spring is installed in the lateral rear end of the second valve core. One end of the second spring is in contact with the second sealing steel ball. The end of the plunger extends into the second valve core and abuts against the other end of the second spring. A plunger sealing ring is fitted on the outer wall of the end of the plunger. A third sealing steel ball is pressed into the lateral front end of the second valve core, and the third sealing steel ball is in contact with the end face of the piston. The air inlet of the preselection valve, the air source input port, the first air outlet, the second air outlet, and the air outlet of the preselection valve are all detachably equipped with anti-loosening connectors.

[0005] This utility model also includes the following technical features: The anti-loosening connector includes a connector body and a one-way ferrule. The connector body includes a coaxially integrated insert positioning sleeve and a connecting sleeve. The one-way ferrule is installed inside the insert positioning sleeve. Each insert positioning sleeve is correspondingly inserted into the preselection valve inlet, air source input port, first air outlet, second air outlet and preselection valve outlet. The unidirectional ferrule includes a fixing ring, and multiple spring arms are installed at equal intervals along the circumference on the end face of the fixing ring. The outer wall of the end of the spring arm is integrally provided with a pressing flange, and the multiple pressing flanges form a cone shape. The inner wall of the spring arm corresponding to the pressing flange is provided with locking teeth, and the multiple locking teeth form an inverted conical cavity. The inner wall of the insertion positioning sleeve is provided with a first boss and a second boss. The fixing ring is abutted against the first boss. The inner wall of the second boss matches the outer wall of the pressing flange. The end of the spring arm is flush with the end of the insertion positioning sleeve. The inner wall of the connecting sleeve is provided with multiple annular grooves, and each annular groove is equipped with an anti-detachment sealing ring.

[0006] The inner walls of the preselection valve inlet, air source input port, first air outlet, second air outlet, and preselection valve outlet are provided with internal threads, and the outer wall of the insert positioning sleeve is provided with external threads. The outer diameter of the connecting sleeve is larger than the outer diameter of the insert positioning sleeve. A compression sealing ring is fitted on the insert positioning sleeve, and the compression sealing ring is in contact with the end of the connecting sleeve.

[0007] A spacer is installed in the first cavity, and the first valve core is inserted in the spacer. A limit support ring, a positioning ring and a pair of sealing rings are fitted on the outside of the first valve core. The pair of sealing rings are respectively set at both ends of the spacer. The limit support ring is in contact with the sealing ring at the upper end of the spacer, and the positioning ring is set below the sealing ring at the lower end of the spacer. A valve body positioning groove for installing the limit support ring is opened in the first cavity. Both ends of the second cavity are provided with valve body positioning grooves. Multiple spacers are installed at equal intervals in the second cavity between a pair of valve body positioning grooves. The second valve core is inserted into the spacer. A pair of limiting support rings and multiple sealing rings are fitted on the second valve core. A pair of limiting support rings are respectively installed in the valve body positioning groove at one end. Each spacer is set between an adjacent pair of sealing rings. The limiting support ring includes a guide sleeve, one end of which is fixedly fitted with a positioning pad ring. Multiple positioning cards are evenly spaced along the edge of the positioning pad ring. The guide sleeve and positioning cards are located on the outer end face of the positioning pad ring. The inner end face of the positioning pad ring abuts against the inner end face of the valve body positioning groove. The positioning cards are inserted into the valve body positioning groove and abut against the outer end face of the valve body positioning groove.

[0008] The bottom end of the upper cover is provided with a positioning protrusion that matches the top end of the first cavity, and an O-ring is fitted on the outer wall of the positioning protrusion.

[0009] A piston sealing ring is fitted onto the outer wall of the piston.

[0010] The outer wall of the top cover is fitted with a top cover sealing ring, and the upper part of the push channel is equipped with a self-lubricating bushing. The self-lubricating bushing is in contact with the outer wall of the push rod. The push rod has an annular groove in its circumference, and a push rod sealing ring is installed in the annular groove.

[0011] A filter is installed in the channel connecting the preselection valve inlet and the air source input port to the first cavity; a filter is installed in the channel connecting the first air outlet and the second air outlet to the second cavity; and a filter is installed in the channel connecting the preselection valve outlet to the inside of the side cover.

[0012] Both the first and second exhaust ports are fitted with dust covers using fixing screws, and sealing gaskets are installed inside the dust covers.

[0013] The first exhaust port has a channel that communicates with the inner cavity of the side cover.

[0014] Compared with the prior art, this utility model has the following technical effects: This utility model inherits the functions of the pneumatic control valve and the single H valve, adapting to various transmissions and possessing good versatility. The sealing devices at each connection point effectively enhance the integrated valve's three-proof capabilities, while also featuring pneumatic shut-off, high / low gear switching, and quick-connect anti-dislodgement functions for the air hose, resulting in a higher degree of product integration. The anti-loosening connector structure facilitates quick assembly, ensuring the air hose remains inserted without slipping out. The multi-layer anti-dislodgement sealing rings guarantee no leakage even when the air hose end is worn. The limiting support ring structure ensures stable valve core movement, preventing uneven wear, and also provides guiding and positioning functions. In humid environments, it prevents rust formation, avoiding air leakage and jamming, thus improving the overall product lifespan and reliability. This integrated valve significantly enhances its overall three-proof capabilities, resolving jamming and air leakage issues during product use, improving the overall quality of transmission products, reducing product costs by 30%, and lowering the failure rate by 30%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 yes Figure 1 Rear view.

[0017] Figure 3 yes Figure 1 The left view.

[0018] Figure 4 yes Figure 1 A sectional view.

[0019] Figure 5 This is a cross-sectional view of the anti-loosening connector of this utility model.

[0020] Figure 6 This is a cross-sectional view of the one-way card sleeve of this utility model.

[0021] Figure 7 This is an installation diagram of the limiting support ring of this utility model.

[0022] Figure 8 This is a structural view of the limiting support ring of this utility model.

[0023] Figure 9 yes Figure 8 A sectional view.

[0024] Figure 10 This is a cross-sectional view of the first exhaust port / second exhaust port of this utility model.

[0025] Figure 11 This is a schematic diagram of the air passage connection in the working state 1 of this utility model.

[0026] Figure 12This is a schematic diagram of the air passage connection in the working state 2 of this utility model.

[0027] Figure 13 This is a schematic diagram of the air passage connection in the working state 3 of this utility model.

[0028] Figure 14 This is a schematic diagram of the air passage connection in working state 4 of this utility model.

[0029] The meanings of the labels in the diagram are as follows: 1. First valve body; 2. Top cover; 3. Preselector valve inlet; 4. Air source input port; 5. First valve core; 6. First sealing steel ball; 7. First spring; 8. Push rod; 9. Second valve body; 10. First outlet; 11. Second outlet; 12. First exhaust port; 13. Second exhaust port; 14. Side cover; 15. Preselector valve outlet; 16. Piston; 17. Rear cover; 18. Plunger; 19. Second valve core; 20. Second sealing steel ball; 21. 21. Second spring; 22. Piston seal ring; 23. Third sealing steel ball; 24. Anti-loosening joint; 25. Spacer; 26. Limiting support ring; 27. Positioning ring; 28. Sealing ring; 29. ​​Valve body positioning groove; 30. Positioning flange; 31. O-ring seal; 32. Piston seal ring; 33. Top cover seal ring; 34. Self-lubricating bushing; 35. Push rod seal ring; 36. Filter plate; 37. Fixing screw; 38. Dust cover; 39. Sealing gasket. 241. Connector body; 242. One-way ferrule; 2411. Insert positioning sleeve; 2412. Connecting sleeve; 2413. First boss; 2414. Second boss; 2415. Anti-detachment sealing ring; 2416. Pressing sealing ring. 2421. Retaining ring; 2422. Spring arm; 2423. Pressing flange; 2424. Clamping tooth; 261. Guide sleeve; 262. Positioning washer ring; 263. Positioning card.

[0030] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0031] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0032] In this utility model, unless otherwise stated, directional terms such as "upper", "lower", "left", and "right" are generally defined based on the drawing in the corresponding figure. "Inner" and "outer" refer to the inner and outer contours of the corresponding components. "Longitudinal", "lateral", and "vertical" refer to the directions marked in the figure.

[0033] Example: This embodiment provides a three-proof integrated valve, such as Figures 1 to 4 As shown, the device includes an integrated air path control valve and a single H valve. The air path control valve comprises a vertically arranged first valve body 1, with a top cover 2 mounted on its top. A first cavity is vertically formed inside the first valve body 1. A pre-selection valve inlet 3 and an air source inlet 4, symmetrically arranged and connected to the first cavity, are formed on the side wall of the first valve body 1. A propulsion channel, coaxially arranged with the first cavity, is formed inside the top cover 2. A first valve core 5, movable along the first cavity, is installed inside the first cavity. A vent hole is formed on the side wall of the first valve core 5. A first sealing steel ball 6 is press-fitted to the top of the first valve core 5. A first spring 7 is installed inside the first valve core 5, with its top contacting the first sealing steel ball 6 and its bottom abutting against the bottom of the first cavity. A push rod 8 is installed inside the propulsion channel, with its bottom contacting the first sealing steel ball 6 and its top extending outside the propulsion channel. The single H valve includes a second valve body 9 horizontally disposed below the first valve body 1. The second valve body 9 is integrally disposed with the first valve body 1. A second cavity communicating with the first cavity is opened horizontally inside the second valve body 9. A first air outlet 10, a second air outlet 11, a first exhaust port 12 and a second exhaust port 13 communicating with the second cavity are opened on the side wall of the second valve body 9. The first air outlet 10 and the second air outlet 11 are respectively connected to the auxiliary box cylinder. The first exhaust port 12 is connected to the first air outlet 10 and the second exhaust port 13 is connected to the second air outlet 11. A side cover 14 is installed at the lateral front end of the second valve body 9. A pre-selection valve outlet 15 is opened on the side cover 14. A piston 16 is installed in the inner cavity of the side cover 14. A rear cover 17 is installed at the lateral rear end of the second valve body 9. A plunger 18 coaxially arranged with the second cavity is installed in the rear cover 17. A second valve core 19 movable along the second cavity is installed in the second cavity. A second sealing steel ball 20 is pressed into the middle of the second valve core 19. Vent holes are opened on the side walls of the second valve core 19 at both ends of the second sealing steel ball 20. A second spring 21 is installed in the lateral rear end of the second valve core 19. One end of the second spring 21 is in contact with the second sealing steel ball 20. The end of the plunger 18 extends into the second valve core 19 and abuts against the other end of the second spring 21. A plunger sealing ring 22 is fitted on the outer wall of the end of the plunger 18. A third sealing steel ball 23 is pressed into the lateral front end of the second valve core 19. The third sealing steel ball 23 is in contact with the end face of the piston 16. Anti-loosening connectors 24 are detachably installed on the preselection valve inlet 3, air source input port 4, first air outlet 10, second air outlet 11 and preselection valve outlet 15.

[0034] In this embodiment, both the first valve core 5 and the second valve core 19 adopt a smooth shaft design to reduce wear on the sealing ring 28 during high and low gear switching. When the first valve core 5 and the second valve core 19 return from the compressed state to the initial state, in addition to the return spring force, they are both pneumatically assisted in returning to the initial state, which improves the response speed of the air valve. The push rod 8 and the first valve core 5 are designed as separate structures to avoid the push rod 8 receiving lateral force and transmitting it to the first valve core 5, ensuring that the axial movement of the first valve core 5 does not wear unevenly. The height-to-diameter ratio of the second spring 21 is increased from 4:1 to 6:1, making the circumferential movement of the second valve core 19 more stable and reducing uneven wear. At the same time, it can avoid the problem of spring corrosion and jamming caused by large particles of impurities, sludge, and water vapor in the air passage inside the cylinder during exhaust. The plunger 18 and the second valve core 19 are piston rod seals, and the plunger surface is coated with polytetrafluoroethylene to improve its service life.

[0035] As a preferred embodiment of this invention, such as Figures 5 to 6 As shown, in this embodiment, the anti-loosening connector 24 includes a connector body 241 and a one-way ferrule 242. The connector body 241 includes a coaxially integrated insert positioning sleeve 2411 and a connecting sleeve 2412. The one-way ferrule 242 is installed inside the insert positioning sleeve 2411. Each insert positioning sleeve 2411 is correspondingly inserted into the preselection valve inlet 3, the air source input port 4, the first air outlet 10, the second air outlet 11, and the preselection valve outlet 15. The anti-loosening connector 24 is used to insert an air pipe to connect the external preselection valve, air compressor, and auxiliary cylinder to the integrated valve. The one-way ferrule 242 includes a retaining ring 2421, the inner diameter of which matches the outer diameter of the trachea. Multiple spring arms 2422 are evenly spaced along the circumferential direction on the end face of the retaining ring 2421. A pressing flange 2423 is integrally formed on the outer wall of the end of each spring arm 2422, with the multiple pressing flanges 2423 forming a cone shape. A locking tooth 2424 is provided on the inner wall of the spring arm 2422 corresponding to the pressing flange 2423, forming an inverted conical cavity. A first boss 2413 and a second boss 2414 are provided on the inner wall of the insertion positioning sleeve 2411. The retaining ring 2421 abuts against the first boss 2413, and the inner wall of the second boss 2414 matches the outer wall of the pressing flange 2423. The minimum inner diameter of the cavity is smaller than the outer diameter of the trachea. After the trachea is inserted into the anti-loosening connector 24 from the outside, the spring arm 2422 is radially expanded. The second protrusion 2414 prevents the spring arm 2422 from expanding radially. The reaction force of the second protrusion 2414 on the spring arm 2422 causes the ends of multiple locking teeth 2424 to apply a clamping force to the trachea. When the trachea is pulled outward, the one-way sleeve 242 moves outward with the trachea. The second protrusion 2414 applies a reverse force to multiple pressing protrusions 2423. The greater the pulling force, the greater the clamping force of the locking teeth 2424, preventing the trachea from coming out and ensuring the stability and airtightness of the connection between the trachea and the valve body. The end of the spring arm 2422 is flush with the end of the insertion positioning sleeve 2411. Multiple annular grooves are provided on the inner wall of the connecting sleeve 2412, and anti-loosening sealing rings 2415 are installed in each annular groove. When the air tube is installed into the anti-loosening connector 24, the anti-loosening sealing rings 2415 form a seal with the outer wall of the air tube. Even if the end of the air tube and the one-way clamp 242 are worn during operation, there will be no air leakage problem.

[0036] Furthermore, internal threads are provided on the inner walls of the preselection valve inlet 3, air source input port 4, first air outlet 10, second air outlet 11, and preselection valve outlet 15, and external threads are provided on the outer wall of the insert positioning sleeve 2411. The threaded connection ensures the reliability of the connection between the anti-loosening connector 24 and the valve body. The outer diameter of the connecting sleeve 2412 is larger than the outer diameter of the insert positioning sleeve 2411, and the end face of the connecting sleeve 2412 fits against the outer wall of the valve body. A compression sealing ring 2416 is fitted on the insert positioning sleeve 2411, and the compression sealing ring 2416 contacts the end of the connecting sleeve 2412. The compression sealing ring 2416 further enhances the airtightness of the anti-loosening connector 24, ensuring that the connection between the anti-loosening connector 24 and the valve body is leak-free.

[0037] As a preferred embodiment of this invention, such as Figures 7 to 9As shown, in this embodiment, a spacer 25 is installed in the first cavity, and the first valve core 5 is inserted into the spacer 25. The first valve core 5 is fitted with a limiting support ring 26, a positioning ring 27 and a pair of sealing rings 28. The pair of sealing rings 28 are respectively disposed at both ends of the spacer 25. The limiting support ring 26 is in contact with the sealing ring 28 at the upper end of the spacer 25, and the positioning ring 27 is disposed below the sealing ring 28 at the lower end of the spacer 25. A valve body positioning groove 29 for installing the limiting support ring 26 is provided in the first cavity. Both ends of the second cavity are provided with valve body positioning grooves 29. Multiple spacers 25 are installed at equal intervals in the second cavity between a pair of valve body positioning grooves 29. The second valve core 19 is inserted into the spacer 25. A pair of limiting support rings 26 and multiple sealing rings 28 are fitted on the second valve core 19. The pair of limiting support rings 26 are respectively installed in the valve body positioning grooves 29 at the corresponding ends. Each spacer 25 is set between an adjacent pair of sealing rings 28. The limiting support ring 26 ensures that the sealing ring 28 and the spacer 25 are in the designed position, ensuring the guiding of the valve core movement. It adopts an injection-molded integrated structure, which is lightweight, low-cost, and allows for rapid assembly. Specifically, the limiting support ring 26 includes a guide sleeve 261, one end of which is fixedly mounted with a positioning pad ring 262. Multiple positioning clips 263 are evenly spaced along the edge of the positioning pad ring 262. The guide sleeve 261 and the positioning clips 263 are located on the outer end face of the positioning pad ring 262. The inner end face of the positioning pad ring 262 abuts against the inner end face of the valve body positioning groove 29. The positioning clips 263... The limiting support ring 26 is inserted into the valve body positioning groove 29 and abuts against the outer end face of the valve body positioning groove 29. During use, the limiting support ring 26 is pressed into the valve body positioning groove 29. After multiple positioning cards 263 enter the valve body positioning groove 29, they automatically open to fix the limiting support ring 26. The guide sleeve 261 provides guidance for the operation of the valve core, ensuring stable movement of the valve core and preventing uneven wear. The positioning pad ring 262 plays a positioning role for the sealing ring 28. The limiting support ring 26 can realize both guiding and positioning functions at the same time. When used in a humid environment, it will not produce rust, avoid air leakage and jamming, and improve the overall life and reliability of the product.

[0038] As a preferred embodiment, the bottom end of the upper cover 2 is provided with a positioning protrusion 30 that matches the top end of the first cavity. The positioning protrusion 30 cooperates with the first cavity to form a positioning, ensuring the coaxiality of the push rod 8 and the first valve core 5 when they are working, solving the problem of coaxiality difference caused by the original threaded connection, and avoiding the push rod 8 and the first valve core 5 from being worn unevenly and causing jamming. An O-ring 3 is fitted on the outer wall of the positioning protrusion 30 to ensure the airtightness of the connection between the upper cover 2 and the first valve body 1, which is dustproof and waterproof, and prevents liquid from entering the valve body and causing the internal parts to rust and jam.

[0039] Furthermore, a cover sealing ring 33 is fitted on the outer wall of the upper cover 2, and a self-lubricating bushing 34 is installed on the upper part of the push channel. The self-lubricating bushing 34 is in contact with the outer wall of the push rod 8. The self-lubricating bushing 34 is made of high-strength steel and coated with polytetrafluoroethylene to reduce the wear rate of the push rod 8 and improve the service life of the product. The push rod 8 and the upper cover 2 are sealed by a piston rod. An annular groove is opened in the circumference of the push rod 8, and a push rod sealing ring 35 is installed in the annular groove to improve assembly and processing efficiency and reduce processing costs.

[0040] As a preferred embodiment, a piston sealing ring 32 is fitted on the outer wall of the piston 16 to achieve bidirectional air sealing of the piston 16. The first exhaust port 12 has a channel that communicates with the inner cavity of the side cover 14 to prevent negative pressure from being generated during operation.

[0041] As a preferred embodiment, a filter 36 is provided in the channel connecting the preselection valve inlet 3 and the air source input port 4 to the first cavity, a filter 36 is provided in the channel connecting the first air outlet 10 and the second air outlet 11 to the second cavity, and a filter 36 is provided in the channel connecting the preselection valve outlet 15 to the inner cavity of the side cover 14. Since there are many impurities and moisture in the vehicle's air source, the filter 36 has dustproof, water absorption, and oil absorption functions, which can improve the performance and life of the product.

[0042] As a preferred embodiment of this invention, such as Figure 10 As shown, in this embodiment, both the first exhaust port 12 and the second exhaust port 13 are fitted with dust covers 38 by fixing screws 37. A sealing gasket 39 is provided inside the dust cover 38. The unidirectional exhaust structure of the first exhaust port 12 and the second exhaust port 13 realizes differential pressure exhaust. The opening pressure is lower than 100pa, preventing dust and impurities from entering the valve body.

[0043] In this embodiment, during actual operation, the anti-loosening connector 24 is installed on the preselection valve inlet 3, the air source input port 4, the first air outlet 10, the second air outlet 11, and the preselection valve outlet 15, respectively, and a suitable diameter air pipe is directly inserted. The specific working principle is as follows: Operating state 1: Push rod in free state, no gas at the outlet of the preselection valve like Figure 11As shown, the main gearbox is in neutral, the pre-selection valve inlet 3 and the air source input port 4 are normally open, compressed air enters the first valve body 1 through the air source input port 4, part of the compressed air is supplied to the pre-selection valve through the pre-selection valve inlet 3, at this time the pre-selection valve is in high gear, there is no compressed air at the pre-selection valve outlet 15, the piston 16 is in the initial position, the second sealing steel ball 20 is biased to one side of the side cover 14, and the other part of the compressed air enters the large first valve core 5 through the vent hole on the first valve core 5, enters the second cavity along the first cavity, and enters the second cavity through the vent hole on the second valve core 19 at the lateral rear end of the second sealing steel ball 20 through the second valve core 19 to the second outlet 11, pushing the auxiliary gearbox cylinder to switch, and the gas in the cylinder is discharged to the atmosphere through the first outlet 10 to the first exhaust port 12.

[0044] Operating state 2: Push rod in free state, gas is present at the outlet of the preselection valve. like Figure 12 As shown, the main gearbox is in neutral. Compressed air enters the first valve body 1 through the air source inlet 4. Part of the compressed air is supplied to the preselection valve through the preselection valve inlet 3. The preselection valve is in low gear, providing compressed air to the preselection valve outlet 15. The piston 16, under the supply of compressed air, pushes the second valve core 19 to move towards the rear cover 17 to switch to low gear. The second sealing steel ball 20 moves to one side of the rear cover 17. The other part of the compressed air enters the first valve core 5 through the vent hole on the first valve core 5, enters the second cavity along the first cavity, and passes through the vent hole on the second valve core 19 at the lateral front end of the second sealing steel ball 20 to the first outlet 10, pushing the auxiliary gearbox cylinder to switch. The gas in the cylinder is discharged to the atmosphere through the second outlet 11 to the second exhaust port 13.

[0045] Working state 3: Push rod compressed state like Figure 13 As shown, the main gearbox is in gear. Compressed air enters the first valve body 1 through the air source inlet 4, and is supplied to the preselection valve through the preselection valve inlet 3 via the first cavity. The push rod 8 compresses the first valve core 5 and moves it downward. The vent hole on the first valve core 5 moves to below the sealing ring 28, and the air path is cut off. Compressed air cannot pass through the first valve core 5 to the first outlet 10 or the second outlet 11. At this time, the preselection valve switches high / low gears, but the auxiliary gearbox does not switch, thus protecting the auxiliary gearbox synchronizer.

[0046] Operating state 4: Piston exhaust operation like Figure 14 As shown, the gas inside the side cover is discharged to the atmosphere through the channel opened on the first exhaust port 12.

Claims

1. A three-proof integrated valve including a gas passage control valve and a single H valve which are integrally provided, characterized in that, The air path control valve comprises a vertically arranged first valve body (1), a top end of the first valve body (1) is provided with an upper cover (2), a first cavity is vertically arranged in the first valve body (1), a preselected valve air inlet (3) and an air source input port (4) are symmetrically arranged on a side wall of the first valve body (1) and are respectively connected with the first cavity, a push channel is coaxially arranged with the first cavity in the upper cover (2), a first valve core (5) is arranged in the first cavity and is movable along the first cavity, air holes are arranged on a side wall of the first valve core (5), a first sealing steel ball (6) is press-fitted on a top end of the first valve core (5), a first spring (7) is arranged in the first valve core (5), a top end of the first spring (7) is in contact with the first sealing steel ball (6), a bottom end of the first spring (7) abuts against a bottom end of the first cavity, a top rod (8) is arranged in the push channel, a bottom end of the top rod (8) is in contact with the first sealing steel ball (6), and a top end of the top rod (8) extends out of the push channel; The single H valve comprises a second valve body (9) which is horizontally arranged below the first valve body (1) and is integrally arranged with the first valve body (1), a second cavity is horizontally arranged in the second valve body (9) and is connected with the first cavity, a first air outlet (10), a second air outlet (11), a first exhaust port (12) and a second exhaust port (13) are arranged on a side wall of the second valve body (9) and are connected with the second cavity, the first air outlet (10) and the second air outlet (11) are respectively connected with the auxiliary box cylinder, the first exhaust port (12) is connected with the first air outlet (10), and the second exhaust port (13) is connected with the second air outlet (11); A side cover (14) is arranged on a horizontal front end of the second valve body (9), a preselected valve air outlet (15) is arranged on the side cover (14), a piston (16) is arranged in an inner cavity of the side cover (14), a rear cover (17) is arranged on a horizontal rear end of the second valve body (9), a plunger (18) is arranged in the rear cover (17) and is coaxially arranged with the second cavity, a second valve core (19) is arranged in the second cavity and is movable along the second cavity, a second sealing steel ball (20) is press-fitted on a middle part of the second valve core (19), air holes are arranged on side walls of the second valve core (19) at two ends of the second sealing steel ball (20), a second spring (21) is arranged in a horizontal rear end of the second valve core (19), one end of the second spring (21) is in contact with the second sealing steel ball (20), an end part of the plunger (18) extends into the second valve core (19) and abuts against the other end of the second spring (21), a plunger sealing ring (22) is sleeved on an outer wall of the end part of the plunger (18), a third sealing steel ball (23) is press-fitted on a horizontal front end of the second valve core (19), and the third sealing steel ball (23) is in contact with an end face of the piston (16); Anti-loosening connectors (24) are detachably arranged on the preselected valve air inlet (3), the air source input port (4), the first air outlet (10), the second air outlet (11) and the preselected valve air outlet (15).

2. The tri-proof integrated valve according to claim 1, wherein The anti-loosening joint (24) comprises a joint body (241) and a one-way sleeve (242), the joint body (241) comprises a plug-in positioning sleeve (2411) and a connecting sleeve (2412) coaxially arranged in one body, and the one-way sleeve (242) is installed in the plug-in positioning sleeve (2411); each plug-in positioning sleeve (2411) is correspondingly inserted into the pre-selection valve air inlet (3), the air source inlet (4), the first air outlet (10), the second air outlet (11) and the pre-selection valve air outlet (15); The one-way sleeve (242) comprises a fixed ring (2421), a plurality of elastic arms (2422) are equidistantly arranged on the end face of the fixed ring (2421) in the circumferential direction, an outer wall of the end portion of the elastic arm (2422) is integrally provided with a pressing convex edge (2423), the plurality of pressing convex edges (2423) form a cone shape, a ratchet (2424) is arranged on the inner wall of the corresponding elastic arm (2422) of the pressing convex edge (2423), and the plurality of ratchets (2424) form a reverse cone-shaped cavity; a first boss (2413) and a second boss (2414) are arranged on the inner wall of the plug-in positioning sleeve (2411), the fixed ring (2421) is in abutment with the first boss (2413), the inner wall of the second boss (2414) is matched with the outer wall of the pressing convex edge (2423), and the end portion of the elastic arm (2422) is flush with the end portion of the plug-in positioning sleeve (2411); A plurality of annular grooves are formed in the inner wall of the connecting sleeve (2412), and a anti-loosening sealing ring (2415) is arranged in each annular groove.

3. The tri-proof integrated valve according to claim 2, wherein Inner threads are formed in the inner walls of the pre-selection valve air inlet (3), the air source inlet (4), the first air outlet (10), the second air outlet (11) and the pre-selection valve air outlet (15), outer threads are arranged on the outer wall of the plug-in positioning sleeve (2411), the outer diameter of the connecting sleeve (2412) is larger than that of the plug-in positioning sleeve (2411), a pressing sealing ring (2416) is arranged on the plug-in positioning sleeve (2411), and the end portion of the connecting sleeve (2412) is in contact with the pressing sealing ring (2416).

4. The tri-proof integrated valve according to claim 1, wherein A spacer (25) is arranged in the first cavity, the first valve core (5) is inserted into the spacer (25), a limiting support ring (26), a positioning ring (27) and a pair of sealing rings (28) are arranged on the first valve core (5) in sequence, the pair of sealing rings (28) are arranged at the two ends of the spacer (25) respectively, the limiting support ring (26) is in contact with the sealing ring (28) at the upper end of the spacer (25), the positioning ring (27) is arranged below the sealing ring (28) at the lower end of the spacer (25), and a valve body positioning groove (29) for arranging the limiting support ring (26) is formed in the first cavity. Both ends of the second cavity are provided with valve body positioning grooves (29), a plurality of spacer sleeves (25) are installed in the second cavity at equal intervals between the pair of valve body positioning grooves (29), the second valve core (19) is inserted into the spacer sleeve (25), a pair of limiting support rings (26) and a plurality of sealing rings (28) are sleeved on the second valve core (19), the pair of limiting support rings (26) are respectively installed in the valve body positioning grooves (29) at the corresponding end, and each spacer sleeve (25) is arranged between a pair of adjacent sealing rings (28). The limiting support ring (26) comprises a guide sleeve (261), one end of the guide sleeve (261) is fixedly provided with a positioning grommet (262), a plurality of positioning cards (263) are arranged at equal intervals on the edge of the positioning grommet (262), the guide sleeve (261) and the positioning card (263) are arranged on the outer side end surface of the positioning grommet (262), the inner side end surface of the positioning grommet (262) is in abutment with the inner side end surface of the valve body positioning groove (29), and the positioning card (263) is clamped into the valve body positioning groove (29) and in abutment with the outer side end surface of the valve body positioning groove (29).

5. The tri-proof integrated valve according to claim 1, wherein The bottom end of the upper cover (2) is provided with a positioning convex edge (30) matched with the top end of the first cavity, and an O-shaped sealing ring (31) is sleeved on the outer wall of the positioning convex edge (30).

6. The tri-proof integrated valve according to claim 1, wherein A piston sealing ring (32) is sleeved on the outer wall of the piston (16).

7. The tri-proof integrated valve according to claim 1, wherein An upper cover sealing ring (33) is sleeved on the outer wall of the upper cover (2), a self-lubricating bushing (34) is installed at the upper portion of the advancing channel, the self-lubricating bushing (34) is in contact with the outer wall of the ejector rod (8), an annular groove is formed in the circumference of the ejector rod (8), and an ejector rod sealing ring (35) is installed in the annular groove.

8. The tri-proof integrated valve according to claim 1, wherein Filter sheets (36) are arranged in the channels communicated with the first cavity of the preselection valve air inlet (3) and the air source input port (4), the filter sheets (36) are arranged in the channels communicated with the second cavity of the first air outlet (10) and the second air outlet (11), and the filter sheets (36) are arranged in the channels communicated with the inner cavity of the side cover (14) of the preselection valve air outlet (15).

9. The tri-proof integrated valve according to claim 1, wherein The first exhaust port (12) and the second exhaust port (13) are both provided with dust covers (38) through fixing screws (37), and sealing pads (39) are arranged in the dust covers (38).

10. The tri-proof integrated valve according to claim 1, wherein The first exhaust port (12) is provided with a channel communicated with the inner cavity of the side cover (14).

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