A leak-proof hydraulic valve

Abstract

This invention relates to the field of hydraulic valve technology, specifically disclosing a leak-proof hydraulic valve, including a valve body and a valve cover mounted on the valve body. A valve stem is threadedly connected to the valve cover via a support bracket. The valve body has a first channel and a second channel internally, and a first sealing block for sealing the first channel and a second sealing block for sealing the second channel are slidably connected inside the valve body. Both the first and second sealing blocks are provided with sealing gaskets. By incorporating a warning mechanism inside the valve body, when the internal pressure of the valve body abnormally increases, the warning mechanism automatically slides outward, issuing a clear warning signal and promptly replacing any damaged sealing gaskets. During the sliding process, the warning mechanism compresses the first sealing block through its compression part, causing the sealing gasket on the first sealing block to reseal, thereby effectively preventing further leakage.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve technology, specifically to a leak-proof hydraulic valve. Background Technology

[0002] A hydraulic valve is an automated component operated by pressurized oil. It is controlled by the pressurized oil of a pressure regulating valve and is usually used in combination with a solenoid pressure regulating valve. There are direct-acting and pilot-operated types, with pilot-operated types being more common. In hydraulic transmission, it is a component used to control the pressure, flow rate, and direction of liquid. Among them, those that control pressure are called pressure control valves, those that control flow rate are called flow control valves, and those that control on / off and flow direction are called directional control valves.

[0003] In the prior art, there is a Chinese patent with authorization announcement number CN217325538U entitled "A Leak-Proof Highly Automated Hydraulic Valve". The aforementioned patent discloses a leak-proof highly automated hydraulic valve, which relates to the field of hydraulic valve technology. It includes a valve body, a control valve connected to the valve body is installed on the top of the valve body, a cylindrical valve block is slidably installed inside the control valve, and a threaded adjustment mechanism for adjusting the position of the cylindrical valve block is installed on the top of the cylindrical valve block.

[0004] For example, Chinese patent CN221647732U, entitled "A Leak-Proof Hydraulic Valve," discloses a leak-proof hydraulic valve, including a valve body and sealing rings. The valve body has an inlet and an outlet at both ends, and sealing rings are fixedly installed on the inner sides of both the inlet and outlet. Sealing grooves are opened on the adjacent sides of the two sealing rings, and sealing discs are snapped into the inner sides of the two sealing grooves. A connecting block is fixedly installed in the middle of the valve body, and fixing rods are fixedly installed on both sides of the connecting block. A movable tube is movably sleeved on the wall of the fixing rod, and one end of the movable tube is fixedly connected to the corresponding sealing disc.

[0005] As a core component of fluid control systems, the sealing performance of hydraulic valves directly affects the reliability and safety of equipment operation. In existing technologies, hydraulic valves generally employ built-in sealing rings to achieve dynamic or static sealing between the valve core and valve body. While this design ensures the compactness and overall integrity of the hydraulic valve to a certain extent, it also introduces significant drawbacks:

[0006] Because the sealing ring is located inside the valve body, its working condition is difficult to observe and monitor directly. Over long-term use, the sealing ring will gradually age and wear due to factors such as hydraulic oil corrosion, mechanical wear, and temperature changes. However, because the sealing ring is relatively hidden, this wear is difficult to detect in a timely manner. Only when the leakage becomes severe enough to cause hydraulic oil to leak from the outside of the valve body can the user notice a problem with the hydraulic valve. Furthermore, if maintenance personnel fail to perform timely maintenance, the hydraulic valve will still be in a leaking state. This delayed detection has serious consequences, not only reducing the efficiency of the hydraulic system but also potentially causing hydraulic system malfunctions and even threatening the safe operation of the entire mechanical equipment.

[0007] Therefore, it is evident that a key technical problem that urgently needs to be solved is how to provide a warning when a hydraulic valve leaks, while also automatically sealing it to prevent further leakage. Summary of the Invention

[0008] The purpose of this invention is to provide a leak-proof hydraulic valve to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof hydraulic valve, comprising a valve body and a valve cover mounted on the valve body, wherein a valve stem is threadedly connected to the valve cover via a support frame; the valve body has a first channel and a second channel internally, and a first sealing block for sealing the first channel and a second sealing block for sealing the second channel are slidably connected inside the valve body; both the first and second sealing blocks are provided with sealing gaskets; the first sealing block is mounted at the bottom of the valve stem, and the first and second sealing blocks are connected via a linkage assembly; a warning mechanism is slidably connected inside the valve body, and the warning mechanism is drivenly connected to the first sealing block via a compression part; when the internal pressure of the valve body increases, the warning mechanism slides outward to the valve body to provide a warning, and during this stroke, the compression part compresses the first sealing block, thereby resealing the sealing gasket on the first sealing block.

[0010] Furthermore, the extrusion section includes a pressure cylinder slidably connected to the valve stem and an extension cylinder mounted on the pressure cylinder, the pressure cylinder intermittently abutting against the first sealing block.

[0011] Furthermore, the warning mechanism includes multiple warning sealing rods that are slidably connected to the valve cover, the multiple warning sealing rods are connected to each other through an ejector frame, and each warning sealing rod is provided with an elastic sealing part between itself and the valve cover; the ejector frame and the extension cylinder are connected by a linkage buffer part.

[0012] Furthermore, the linkage buffer section includes multiple limiting plates slidably connected to the extension cylinder, and each limiting plate is provided with a buffer spring between it and the extension cylinder; the multiple limiting plates are respectively connected to the ejector frame through a transmission section.

[0013] Furthermore, a power storage mechanism is provided between the valve cover and the extension cylinder. The power storage mechanism includes a power storage plate that is slidably connected to the valve cover, and a locking member for locking the power storage plate is provided on the valve cover. A power storage spring is provided between the power storage plate and the valve stem. When the locking member unlocks the power storage plate, the elastic force of the power storage spring causes the power storage plate to abut against the extension cylinder.

[0014] Furthermore, a pushing member is provided between the transmission part and the locking member. When the ejector frame slides upward under the influence of the pressure inside the valve body, the pushing member gradually drives the locking member to unlock the power storage plate during the stroke of the transmission part driving the pressure cylinder to slide downward.

[0015] Furthermore, the linkage component includes a connecting frame rotatably connected to the valve stem, a pressure rod fixedly connected to the connecting frame, and a connecting rod provided on the second slider. A pressure groove is provided on the connecting rod, and the pressure rod abuts against the pressure groove. A reset component is also provided between the connecting rod and the valve body.

[0016] Furthermore, a wedge-shaped extrusion block is fixedly connected to the connecting rod, and the wedge-shaped extrusion block intermittently abuts against the first sealing block.

[0017] Furthermore, the elastic sealing part includes a sealing ring fixedly connected to the ejector plate, and a sealing groove adapted to the sealing ring is provided on the valve cover, wherein the sealing ring is engaged with the sealing groove; a plurality of return springs are also provided between the ejector frame and the valve cover.

[0018] Furthermore, multiple sets of extrusion grooves are formed on the periphery of the pressure cylinder, and each extrusion groove is inclined.

[0019] Compared with the prior art, the beneficial effects of this invention are as follows: This anti-leakage hydraulic valve, by setting a warning mechanism inside the valve body, can automatically slide outwards when the internal pressure of the valve body increases abnormally, issuing a clear warning signal to remind the operator to check and handle the situation in a timely manner, and replace any damaged gaskets promptly. Furthermore, during the sliding process, the warning mechanism compresses the first sealing block through its compression part, causing the gasket on the first sealing block to reseal, thereby effectively preventing further leakage. Therefore, this application achieves the dual functions of active warning and automatic sealing, not only promptly detecting potential leakage risks but also taking measures to prevent leakage from escalating at the first moment, greatly improving the reliability and safety of the hydraulic system.

[0020] Furthermore, after the locking element is unlocked, the accumulator mechanism utilizes the elastic force of the accumulator spring. At this point, the accumulator plate is not in contact with the extension cylinder. When the warning mechanism automatically slides to the outside of the valve body, the pushing element gradually drives the locking element to unlock the accumulator plate as the ejector frame slides upward under the influence of the internal pressure of the valve body. This achieves precise linkage between pressure changes and sealing actions. After the accumulator plate is unlocked, the elastic force of the accumulator spring causes the accumulator plate to contact the extension cylinder, further enhancing the squeezing effect of the pressure cylinder on the first sealing block, achieving multi-stage squeezing. This not only improves the sealing performance of the hydraulic valve under high-pressure conditions but also extends the service life of the sealing gasket and reduces maintenance costs.

[0021] Furthermore, the first and second sealing blocks are connected by a linkage assembly. The second sealing block slides away from the second channel, opening the valve. Conversely, when the valve needs to be closed, the first sealing block slides closer to the first channel, and the second sealing block simultaneously slides towards the second channel, closing the valve. Only the first sealing block needs to be driven to control the movement of both blocks simultaneously, eliminating the need for a separate drive mechanism for the second sealing block. Compared to existing technologies that require a separate drive mechanism for each channel, this design simplifies the valve's internal structure and external control mechanism. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the valve's closed state structure in the prior art;

[0024] Figure 2 This is a schematic diagram of the valve in the open state in the prior art;

[0025] Figure 3 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the overall top view structure provided for an embodiment of the present invention;

[0027] Figure 5 for Figure 4 Schematic diagram of the structure in sectional view along the AA section;

[0028] Figure 6 This is a schematic diagram of the installation position structure of the second sealing block provided in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the installation position structure of the linkage component provided in an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the installation position structure of the warning mechanism provided in an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the warning mechanism location from another perspective provided in an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram showing the contact state between the extrusion block and the first sealing block according to an embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the connection method between the linkage component and the pressure cylinder provided in an embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram of the installation position structure of the transmission part provided in an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the valve cover in a concealed state provided in an embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of the installation position structure of the energy storage mechanism provided in an embodiment of the present invention;

[0037] Figure 15 A top view of the connection method between the warning mechanism and the valve cover provided in an embodiment of the present invention;

[0038] Figure 16 for Figure 15 Schematic diagram of the cross-sectional structure along the middle BB line;

[0039] Figure 17 This is a top view structural schematic diagram of the energy storage mechanism provided in an embodiment of the present invention;

[0040] Figure 18 for Figure 17 Schematic diagram of the CC section structure along the middle;

[0041] Figure 19 This is a schematic diagram showing the state of the pusher being located inside the locking member according to an embodiment of the present invention;

[0042] Figure 20 This is a schematic diagram of the connection method between the valve stem and the first sealing block provided in an embodiment of the present invention;

[0043] Figure 21 A partial exploded view of the connection method between the linkage buffer section and the extension cylinder provided in an embodiment of the present invention;

[0044] Figure 22This is a schematic diagram showing the locking member and the power storage plate separated, as provided in an embodiment of the present invention.

[0045] Figure 23 A cross-sectional view of the linkage component provided in an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Valve cover; 5. Valve stem; 51. Mounting block; 6. First channel; 7. Second channel; 8. First sealing block; 81. Flow groove; 9. Second sealing block; 10. Linkage assembly; 101. Connecting rod; 102. Pressure rod; 103. Pressure groove; 104. Connecting frame; 11. Reset component; 12. Pressure cylinder; 121. Squeezing groove; 13. Warning mechanism; 131. Warning sealing rod; 1 32. Connecting column; 133. Ejector frame; 134. Sealing groove; 135. Sealing ring; 136. Return spring; 14. Extension cylinder; 15. Transmission part; 16. Linkage buffer part; 161. Limiting plate; 162. Buffer spring; 17. Energy storage spring; 18. Energy storage plate; 19. Locking component; 191. Locking block; 192. Locking spring; 193. Abutment groove; 20. Pushing component; 201. Ejector rod; 202. Ejector groove; 21. Wedge-shaped extrusion block. Detailed Implementation

[0047] 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.

[0048] Please see Figures 1-23 This invention provides a technical solution: a leak-proof hydraulic valve, including a valve body 1 and a valve cover 4 mounted on the valve body 1. A valve stem 5 is threadedly connected to the valve cover 4 via a support frame. The valve body 1 has a first channel 6 and a second channel 7 inside, and a first sealing block 8 for sealing the first channel 6 and a second sealing block 9 for sealing the second channel 7 are slidably connected inside the valve body 1. Both the first sealing block 8 and the second sealing block 9 are provided with sealing gaskets. The first sealing block 8 is mounted at the bottom of the valve stem 5, and the first sealing block 8 and the second sealing block 9 are connected by a linkage assembly 10. A warning mechanism 13 is slidably connected inside the valve body 1, and the warning mechanism 13 is drivenly connected to the first sealing block 8 through a compression part. When the internal pressure of the valve body 1 increases, the warning mechanism 13 slides outward of the valve body 1 to provide a warning. During this stroke, the compression part compresses the first sealing block 8, so that the sealing gasket on the first sealing block 8 is sealed again.

[0049] Specifically, the anti-leakage hydraulic valve includes a valve body 1, with an inlet pipe 2 and an outlet pipe 3 on both sides of the valve body 1. The valve body 1 controls whether the inlet pipe 2 and the outlet pipe 3 are open. Therefore, when the valve is closed, the pressure inside the inlet pipe 2 is greater than the pressure inside the outlet pipe 3. It also includes a valve cover 4 mounted on the valve body 1, with a valve stem 5 threadedly connected to the valve cover 4 via a support frame. The opening and closing of the valve body 1 is controlled by the rotation of the valve stem 5. Specifically, the valve body 1 has a first channel 6 and a second channel 7 internally, and a first sealing block 8 for sealing the first channel 6 and a second sealing block 9 for sealing the second channel 7 are slidably connected inside the valve body 1. Both the first sealing block 8 and the second sealing block 9 are equipped with sealing gaskets. Specifically, the sealing gaskets are made of materials such as silicone or rubber, as is common in the prior art. Even if the sealing of the first sealing block 8 fails, causing leakage in that channel, the second channel 7 can still be closed, providing a certain degree of backup closing capability, potentially extending the service life of the sealing gaskets and improving overall sealing reliability.

[0050] Specifically, the first sealing block 8 is installed at the bottom of the valve stem 5. Preferably, an installation block 51 is provided on the bottom of the valve stem 5. The first sealing block 8 is connected to the valve stem 5 through the installation block 51. When the valve stem 5 slides, the first sealing block 8 slides through the installation block 51. More specifically, a flow groove 81 is provided on the first sealing block 8. When the first sealing block 8 moves away from the first channel 6, liquid can flow through the flow groove 81, thereby opening the valve body 1. The first sealing block 8 and the second sealing block 9 are connected through a linkage component 10. That is, when the first sealing block 8 slides, it can drive the second sealing block 9 to slide synchronously. That is, when the first sealing block 8 slides away from the first channel 6, the second sealing block 9 will slide away from the second channel 7, thereby opening the valve body 1. Conversely, when it is necessary to close the valve body 1, when the first sealing block 8 is driven to slide closer to the first channel 6, the second sealing block 9 will slide synchronously towards the second channel 7, thereby closing the valve. By applying driving force to the first sealing block 8, the movement of both sealing blocks can be controlled simultaneously. There is no need to set up a separate driving device for the second sealing block 9. Compared with setting up an independent driving mechanism for each channel, the design of this application simplifies the internal structure and external control mechanism of the valve.

[0051] A warning mechanism 13 is slidably connected inside the valve body 1. When the internal pressure of the valve body 1 increases abnormally, the warning mechanism 13 can automatically slide outward from the valve body 1, emitting a clear warning signal to remind the operator to check and handle the situation promptly. The warning mechanism 13 is also connected to the first sealing block 8 via a compression part. Specifically, the compression part slides inside the valve body 1. When leakage occurs in the sealing ring 135 inside the valve body 1, the compression part can compress the first sealing block 8, thereby subjecting the elastic sealing gasket on the first sealing block 8 to secondary compression, temporarily achieving a sealing effect and realizing automatic compensation of the sealing gasket. During this process, the warning mechanism 13 can move upward upon receiving an abnormal increase in internal pressure of the valve body 1, reminding the operator to check and handle the situation promptly and replace any damaged sealing gaskets.

[0052] More specifically, when valve body 1 is in the closed state, the first sealing block 8 is located at the first channel 6 and the second sealing block 9 is located at the second channel 7, serving a sealing function. When the internal pressure of valve body 1 increases abnormally, the warning mechanism 13 located inside valve body 1 slides outward under pressure, emitting a clear warning signal to remind operators to check and handle the situation promptly, and replace any damaged gaskets in a timely manner. Furthermore, during the stroke of the warning mechanism 13 sliding outward to serve as a warning, it compresses the first sealing block 8 through the compression part, causing the gasket on the first sealing block 8 to re-seal, thus temporarily sealing the interior of valve body 1 and effectively preventing further leakage. Therefore, as the warning mechanism 13 slides while compressing and fixing the gasket on the first sealing block 8 through the compression part, this application can achieve the dual functions of active warning and automatic sealing. It can not only promptly detect potential leakage risks but also take measures to prevent leakage from escalating at the first moment, greatly improving the reliability and safety of the hydraulic system.

[0053] In the embodiments provided by the present invention, the compression part includes a pressure cylinder 12 slidably connected to the valve stem 5 and an extension cylinder 14 mounted on the pressure cylinder 12. The pressure cylinder 12 intermittently abuts against the first sealing block 8. In use, the sliding of the extension cylinder 14 drives the pressure cylinder 12 to slide, thereby compressing the first sealing block 8 through the sliding of the pressure cylinder 12. This effectively transmits the internal pressure of the valve body 1 to the first sealing block 8, achieving re-sealing of the sealing gasket and enhancing the sealing effect.

[0054] In the embodiments provided by the present invention, the warning mechanism 13 includes a plurality of warning sealing rods 131 slidably connected to the valve cover 4. The plurality of warning sealing rods 131 are connected to each other through an ejector frame 133, and each warning sealing rod 131 is provided with an elastic sealing part between itself and the valve cover 4. The ejector frame 133 and the extension cylinder 14 are connected by a linkage buffer part 16. When the internal pressure of the valve body 1 increases, the warning sealing rods 131 can slide outward to provide a warning, while the elastic sealing part can ensure the sealing performance. The elastic sealing part includes a sealing ring 135 fixedly connected to the ejector plate. A sealing groove 134 adapted to the sealing ring 135 is provided on the valve cover 4, and the sealing ring 135 is engaged with the sealing groove 134. A plurality of return springs 136 are also provided between the ejector frame 133 and the valve cover 4. Specifically, a vertical sealing groove for the warning sealing rods 131 is provided on the valve cover 4, wherein the warning sealing rods 131 are slidably connected to the vertical sealing grooves. More specifically, a connecting post 132 is provided between each warning sealing rod 131 and the ejector frame 133 to improve the stability of the warning sealing rod 131 during installation. When the internal pressure of the valve body 1 increases abnormally, the ejector frame 133 is pushed upward by the pressure. At this moment, the ejector frame 133 moves upward against the elastic force of the return spring 136, thereby causing the warning sealing rod 131 to slide vertically in the sealing groove until the warning sealing rod 131 slides out of the valve body 1, thus serving as a warning. At the same time, the warning sealing rod 131 can be painted with different colors from top to bottom to indicate different leakage levels, such as from blue to yellow to orange to red, with red being the highest level, indicating that the internal pressure of the valve body 1 has reached its maximum and immediate action is required.

[0055] Of course, as a further preferred option, when the valve body is used in environments with specific requirements (such as situations where extremely high sealing performance is required), an alarm can be installed on the outside of the valve body. The alarm is located above the warning sealing rod 131. When the warning sealing rod 131 slides to the set position, the warning sealing rod 131 will contact the alarm, and the alarm will sound to remind the staff to carry out timely maintenance.

[0056] As the warning sealing rod 131 continues to slide upward, the multiple sealing rings 135 will respectively engage in the corresponding sealing grooves 134, thereby sealing the warning sealing rod 131 and preventing liquid from leaking out from the warning sealing rod 131 and the sealing groove. At the same time, when the pressure inside the valve body 1 decreases, the elastic force of the multiple sets of return springs 136 drives the warning mechanism 13 to reset and return to its initial state. Since the ejector frame 133 and the extension cylinder 14 are connected by a linkage buffer part 16, when the ejector frame 133 moves upward, it will drive the extension cylinder 14 to slide downward through the linkage buffer part 16, so that the pressure cylinder 12 can squeeze the first sealing block 8, effectively transmitting the internal pressure of the valve body 1 to the first sealing block 8, achieving re-sealing of the sealing gasket and enhancing the sealing effect.

[0057] In the embodiments provided by the present invention, specifically, the linkage buffer unit 16 includes multiple limiting plates 161 slidably connected to the extension cylinder 14. Each limiting plate 161 and the extension cylinder 14 are provided with a buffer spring 162. When the limiting plate 161 slides downward, it will drive the extension cylinder 14 to slide downward synchronously through the buffer spring 162. Specifically, the multiple limiting plates 161 are respectively connected to the ejector frame 133 through the transmission unit 15. Preferably, the transmission unit 15 can be a linkage mechanism, that is, when the ejector frame 133 slides upward, the linkage mechanism drives the limiting plate 161 to slide downward, and the limiting plate 161 drives the extension cylinder 14 to slide downward. Finally, the pressure is applied to the first sealing block 8 through the pressure cylinder 12, which can effectively transmit the internal pressure of the valve body 1 to the first sealing block 8, realize the re-sealing of the sealing gasket, and enhance the sealing effect. The linkage mechanism is the prior art, which can realize that the ejector frame 133 slides upward while the extension cylinder 14 slides downward.

[0058] In another embodiment of the present invention, the transmission unit 15 can be a gear transmission component. Specifically, both the ejector frame 133 and the limiting plate 161 are equipped with racks, and a gear is rotatably connected to the valve cover 4. Two racks are respectively meshed on both sides of the gear. When the ejector frame 133 slides upward, the racks drive the gear to rotate, which in turn drives the limiting plate 161 to slide downward through the racks on the limiting plate 161, thus providing power for the downward sliding of the limiting plate 161. Specifically, the lengths of the two racks can be selected according to the working requirements.

[0059] In the embodiments provided by the present invention, a power storage mechanism is specifically provided between the valve cover 4 and the extension cylinder 14. The power storage mechanism includes a power storage plate 18 slidably connected to the valve cover 4. Preferably, the power storage plate 18 is slidably connected inside the valve cover 4, and a locking member 19 for locking the power storage plate 18 is provided on the valve cover 4. Specifically, the locking member 19 includes a locking block 191 slidably connected inside the valve cover 4. A locking spring 192 is also provided between the locking block 191 and the valve cover 4, and an abutment groove 193 adapted to the locking block 191 is provided on the bottom of the power storage plate 18. The elastic force of the locking spring 192 drives the locking block 191 to engage in the abutment groove 193, thereby locking the power storage plate 18. A accumulator spring 17 is provided between the accumulator plate 18 and the valve stem 5. When the locking member 19 unlocks the accumulator plate 18, the elastic force of the accumulator spring 17 causes the accumulator plate 18 to abut against the extension cylinder 14. The elastic force of the accumulator spring 17 is greater than that of the buffer spring 162. At this moment, when the locking block 191 moves away from the accumulator plate 18, the elastic force of the accumulator spring 17 drives the accumulator plate 18 to move downward, and overcomes the elastic force of the buffer spring 162 to further drive the extension cylinder 14 to slide downward. Therefore, the first sealing block 8 can be further squeezed to achieve re-sealing of the sealing gasket. This not only improves the sealing performance of the hydraulic valve under high pressure conditions, but also extends the service life of the sealing gasket and reduces maintenance costs.

[0060] In the embodiment provided by the present invention, a pushing member 20 is also provided between the transmission part 15 and the locking member 19. When the ejector frame 133 slides upward under the influence of the pressure inside the valve body 1, during the stroke of the transmission part 15 driving the pressure cylinder 12 to slide downward, the pushing member 20 gradually drives the locking member 19 to unlock the power storage plate 18. Specifically, the pushing member 20 includes an ejector rod 201 provided on the ejector frame 133, and an ejector groove 202 adapted to the ejector rod 201 is provided on the locking block 191. When the ejector rod 201 slides upward, the cooperation between the ejector rod 201 and the ejector groove 202 drives the locking block 191 to slide out from the abutment groove 193, thereby unlocking the power storage plate 18. Specifically, when the transmission unit 15 is a gear transmission, the rack on the ejector frame 133 is fixedly connected to the ejector rod 201. That is, when the ejector frame 133 slides upward, the ejector rod 201 will slide upward and drive the rack to slide together. That is, when the ejector frame 133 slides upward, it can drive the extension cylinder 14 to slide downward through the transmission unit 15, while driving the locking block 191 to gradually slide out from the abutment groove 193, unlocking the power storage plate 18, so as to meet the need to squeeze the first sealing block 8 again.

[0061] In the embodiments provided by the present invention, the linkage component 10 includes a connecting frame 104 rotatably connected to the valve stem 5. Specifically, a clearance groove is provided on the pressure cylinder 12, and the connecting frame 104 is slidably connected to the clearance groove. A pressure rod 102 is fixedly connected to the connecting frame 104, and a connecting rod 101 is provided on the second slider. A pressure groove 103 is provided on the connecting rod 101, and the pressure rod 102 abuts against the pressure groove 103. When it is necessary to install the first sealing block 8 and the second sealing block 9 in their respective positions, the valve stem 5 is driven to rotate on the valve body 1. When the valve stem 5 rotates, it will drive the first sealing block 8 to slide downward, installing the first sealing block 8 at the position of the first channel 6. During this stroke, the connecting frame 104 drives the pressure rod 102 to slide downward. During the downward sliding process, the pressure rod 102 abuts against the pressure groove 103, and then the connecting rod 101 drives the second sealing block 9 to seal the second channel 7. The linkage component 10 enables the synchronous action of the first sealing block 8 and the second sealing block 9, ensuring the sealing performance of the two channels. Simultaneously, the reset component 11 ensures the stability and reliability of the system. Specifically, a reset component 11 is provided between the connecting rod 101 and the valve body 1. When the pressure rod 102 is not in contact with the pressure groove 103, the reset component 11 drives the second sealing block 9 to reset, at which point the second sealing block 9 will move away from the second channel 7. In one embodiment, the reset component 11 includes a protrusion fixedly connected to the connecting rod 101. The protrusion is slidably connected to the valve body 1, and a positioning spring is provided between the protrusion and the valve body 1. The spring force of the positioning spring drives the protrusion to move the second sealing block 9 away from the second channel 7, thereby opening the valve body 1.

[0062] Specifically, when the internal sealing gasket of valve body 1 is damaged and needs to be replaced, the valve stem 5 rotates, causing the mounting block 51 to slide upward. During the upward sliding stroke of the mounting block 51, the first sealing block 8 also slides upward. Furthermore, as the valve stem 5 slides upward, it also causes the connecting frame 104 to slide upward together, and the connecting frame 104 slides within the clearance groove inside the extension cylinder 14. When the connecting frame 104 slides upward to the end of the clearance groove, it abuts against the inner top of the clearance groove. At this point, as the valve stem 5 continues to rotate, the connecting frame 104 causes the extension cylinder 14 to slide upward together, which in turn causes the energy storage plate 18 to slide upward, resetting the energy storage plate 18 to its predetermined position. At the same time, when the pressure inside the valve body 1 decreases, the elastic force of multiple sets of reset springs 136 drives the warning mechanism 13 to reset and return to the initial state, that is, the ejector 133 slides down. When the ejector 133 slides down, it drives the ejector rod 201 and others to slide down together. At this time, the ejector rod 201 is released from the restriction of the locking block 191, and the elastic force of the locking spring 192 drives the locking block 191 to be located below the energy storage plate 18, locking the energy storage plate 18 again to meet the needs of the next operation.

[0063] In the embodiment provided by the present invention, a wedge-shaped extrusion block 21 is fixedly connected to the connecting rod 101, and the wedge-shaped extrusion block 21 intermittently abuts against the first sealing block 8. Specifically, when the pressure inside the valve body 1 increases, the pressure acting on the second sealing block 9 also increases, that is, the second sealing block 9 will continuously extrude the second channel 7. When the second sealing block 9 slides, it will drive the wedge-shaped extrusion block 21 to contact the first sealing block 8 through the connecting rod 101, and extrude the first sealing block 8, thereby further improving the sealing effect inside the valve body 1. Moreover, this method is an unexpected technical effect, where the increase in pressure inside the valve body 1 acts on the second sealing block 9 and unexpectedly extrudes the first sealing block 8.

[0064] In the embodiments provided by the present invention, multiple sets of extrusion grooves 121 are formed on the periphery of the pressure cylinder 12, each extrusion groove 121 being inclined, with the liquid located inside the extrusion groove 121. Preferably, the extrusion grooves 121 are evenly formed on the periphery of the pressure cylinder 12, which makes the pressure cylinder 12 more evenly stressed. At this time, the inclined extrusion grooves 121 can transmit pressure more effectively, thereby extruding the first sealing block 8 and enhancing the sealing effect.

[0065] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof hydraulic valve, comprising a valve body (1) and a valve cover (4) mounted on the valve body (1), wherein a valve stem (5) is threadedly connected to the valve cover (4) via a support frame, characterized in that: The valve body (1) is provided with a first channel (6) and a second channel (7), and a first blocking block (8) for blocking the first channel (6) and a second blocking block (9) for blocking the second channel (7) are slidably connected inside the valve body (1). Both the first blocking block (8) and the second blocking block (9) are provided with sealing gaskets. The first sealing block (8) is installed at the bottom of the valve stem (5), and the first sealing block (8) and the second sealing block (9) are connected by a linkage assembly (10); The valve body (1) has a sliding connection to a warning mechanism (13), which is connected to the first sealing block (8) via a squeezing part. When the internal pressure of the valve body (1) increases, the warning mechanism (13) slides to the outside of the valve body (1) to play a warning role. During this stroke, the extrusion part extrudes the first sealing block (8) so that the sealing gasket on the first sealing block (8) is sealed again. The extrusion section includes a pressure cylinder (12) slidably connected to the valve stem (5) and an extension cylinder (14) mounted on the pressure cylinder (12). The pressure cylinder (12) intermittently abuts against the first sealing block (8). The warning mechanism (13) includes multiple warning sealing rods (131) that are slidably connected to the valve cover (4). The multiple warning sealing rods (131) are connected to each other through a push-out frame (133), and each warning sealing rod (131) is provided with an elastic sealing part between it and the valve cover (4). The ejector frame (133) and the extension cylinder (14) are connected by a linkage buffer part (16).

2. The anti-leakage hydraulic valve according to claim 1, characterized in that: The linkage buffer part (16) includes multiple limiting plates (161) that are slidably connected to the extension cylinder (14), and each limiting plate (161) and the extension cylinder (14) are provided with a buffer spring (162). Multiple limit plates (161) are connected to the ejector frame (133) via transmission parts (15).

3. The anti-leakage hydraulic valve according to claim 2, characterized in that: A power storage mechanism is also provided between the valve cover (4) and the extension cylinder (14). The power storage mechanism includes a power storage plate (18) that is slidably connected to the valve cover (4), and a locking member (19) for locking the power storage plate (18) is provided on the valve cover (4). A power storage spring (17) is provided between the power storage plate (18) and the valve stem (5). When the locking element (19) unlocks the power storage plate (18), the elastic force of the power storage spring (17) causes the power storage plate (18) to abut against the extension tube (14).

4. A leak-proof hydraulic valve according to claim 3, characterized in that: A pusher (20) is also provided between the transmission part (15) and the locking part (19). When the ejector (133) slides upward under the influence of the pressure inside the valve body (1), the transmission part (15) drives the pressure cylinder (12) to slide downward during the stroke, and the pusher (20) gradually drives the locking part (19) to unlock the power storage plate (18).

5. A leak-proof hydraulic valve according to claim 1, characterized in that: The linkage component (10) includes a connecting frame (104) rotatably connected to the valve stem (5), a pressure rod (102) fixedly connected to the connecting frame (104), and a connecting rod (101) provided on the second slider. A pressure groove (103) is provided on the connecting rod (101), and the pressure rod (102) abuts against the pressure groove (103). A reset element (11) is also provided between the connecting rod (101) and the valve body (1).

6. A leak-proof hydraulic valve according to claim 5, characterized in that: A wedge-shaped extrusion block (21) is fixedly connected to the connecting rod (101), and the wedge-shaped extrusion block (21) intermittently abuts against the first sealing block (8).

7. A leak-proof hydraulic valve according to claim 1, characterized in that: The elastic sealing part includes a sealing ring (135) fixedly connected to the top plate, and a sealing groove (134) adapted to the sealing ring (135) is provided on the valve cover (4), and the sealing ring (135) and the sealing groove (134) are engaged. Multiple return springs (136) are also provided between the ejector frame (133) and the valve cover (4).

8. A leak-proof hydraulic valve according to claim 1, characterized in that: The pressure cylinder (12) has multiple sets of extrusion grooves (121) on its periphery, and each extrusion groove (121) is inclined.

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