Stacked pressure-anti-cavitation functional valve

Abstract

The utility model discloses a stacked pressure-anti-cavitation function valve which is used for preventing double-acting execution elements (such as a hydraulic oil cylinder and a hydraulic motor) from protecting the execution elements (such as the hydraulic oil cylinder and the hydraulic motor) under the action of external force when the double-acting execution elements (such as the hydraulic oil cylinder and the hydraulic motor) do not work. When the external force pressure is larger than the set pressure, the overflow valve relieves pressure and overflows, meanwhile, the one-way valve can supplement oil (such as a hydraulic oil cylinder and a hydraulic motor), on one hand, an execution element can be protected, and on the other hand, cavitation can be effectively prevented. In addition, the system is designed into a stacked intelligent module, so that maintenance, installation and problem handling are very convenient. After the mounting assemblies and the connecting rods are additionally arranged, the two sandwich valves can be quickly assembled, only the corresponding mounting assemblies and the corresponding connecting rods need to be disassembled during follow-up overhaul and maintenance, use is very convenient, only the overhauled sandwich valves need to be disassembled, overall disassembly is not needed, and therefore the maintenance cost is low, and more convenience and rapidness are achieved. And certainly, a mounting hole is reserved, so that the integral assembly can be realized through a traditional screw rod.

Description

Technical Field

[0001] This utility model relates to superimposed valve technology and anti-cavitation valve technology, and in particular to a superimposed pressure-anti-cavitation functional valve. Background Technology

[0002] In hydraulic systems, when the pressure of the flowing fluid at a certain point is lower than the air separation pressure, the air previously dissolved in the fluid will be released, causing a large number of bubbles to form. This is the cavitation phenomenon in hydraulics. Relief valves are used to protect actuators (such as hydraulic cylinders and hydraulic motors) from damage under external forces. When the external pressure exceeds the set pressure, the relief valve opens to release pressure. However, cavitation can easily occur during the pressure release process, thus damaging the actuators. Currently, there is no good solution to prevent cavitation; most methods rely on periodic monitoring and venting once detected. However, this approach significantly increases maintenance costs, reduces the stability of the hydraulic system, and increases the probability of damage to hydraulic components.

[0003] Therefore, how to prevent cavitation during the overflow process is a technical problem that needs to be solved. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this utility model is to provide a superimposed pressure-anti-cavitation functional valve, which can prevent the formation of cavitation during the overflow process.

[0005] To achieve the above objectives, this utility model provides a superimposed pressure-anti-cavitation functional valve, including a first overflow valve, a second overflow valve, a first check valve, a second check valve, a port B, a port A, a port TB, a port TA, a port P, a first oil passage, a second oil passage, a third oil passage, a fourth oil passage, a fifth oil passage, a sixth oil passage, a seventh oil passage, a first channel, a second channel, and a third channel. The first oil passage is connected to the port TA, the second oil passage is connected to the port P, the third oil passage is connected to the port B, the fourth oil passage is connected to the port A, and the fifth oil passage is connected to the port TB.

[0006] The third oil passage is connected to one end of the first channel and the outlet of the first check valve. The oil inlet of the first overflow valve is connected to the first channel, and the oil outlet is connected to the second channel through the sixth oil passage. The sixth oil passage is connected to the inlet of the first check valve.

[0007] The fourth oil passage is connected to the third channel, the third channel is connected to the oil inlet of the second relief valve, the oil outlet of the second relief valve is connected to the seventh oil passage, the seventh oil passage is connected to the second channel and the outlet of the second check valve, and the inlet of the second check valve is connected to the fourth oil passage.

[0008] As a further improvement of this utility model, the first channel is connected to the first one-way connector MA, and the third channel is connected to the second one-way connector MB.

[0009] As a further improvement of this utility model, the second channel is also connected to the first oil passage and the fifth oil passage.

[0010] As a further improvement of this utility model, it also includes a valve body and a connecting rod. The valve body is provided with a mounting hole and a mounting assembly is installed. At least one end of the connecting rod is provided with a large end, the diameter of which is larger than that of the connecting rod, and the large end is inserted into the mounting hole.

[0011] The valve body is also provided with an installation groove, which communicates with the installation hole. The installation component is installed in the installation groove. The installation component includes a screw sleeve, a stud, a pressing block, a connecting seat, and a slider. The upper and lower end faces of the pressing block are respectively fitted and slidably assembled with the installation groove. The screw sleeve is installed on the valve body, with one end of the screw sleeve protruding from the valve body. The screw sleeve is fitted around the stud and is screwed into it. One end of the stud is assembled with the slider. The slider is inserted into the connecting seat grooves on both sides and is engaged and slidably assembled with them. The connecting seat grooves are located inside the connecting seat. The two sides of the slider are respectively pressed or assembled with one end of a spring, and the other end of the spring is pressed or assembled with the inner wall of the connecting seat. The springs on both sides of the slider are used to generate elastic damping for the slider to slide relative to the connecting seat.

[0012] The extrusion block is provided with an extrusion inclined surface, which fits against the fixed inclined surface. The fixed inclined surface is set on the fixed block, which is installed and fixed in the mounting groove. A push plate is also engaged and slidably installed in the mounting groove. One side of the push plate is assembled or pressed against one end of the push plate spring, and the other end of the push plate spring is pressed or assembled against the inner wall of the mounting groove. The side of the extrusion block is pressed and assembled against the end of the large end.

[0013] As a further improvement of this utility model, a hexagonal prism is provided on one end of the threaded sleeve that protrudes from the valve body.

[0014] As a further improvement of this utility model, the extrusion block is also provided with an extrusion groove, which allows the large end to pass through.

[0015] As a further improvement of this utility model, it also includes a stop block, which engages and slides with a stop groove on the valve body. The stop block is assembled or pressed with one end of a stop spring, and the other end of the stop spring is assembled or pressed with an end plate. The end plate is mounted on the valve body, and the stop spring applies a spring force to the stop block to push it toward the mounting hole.

[0016] The beneficial effects of this utility model are:

[0017] This invention protects double-acting actuators (such as hydraulic cylinders and hydraulic motors) from external force when they malfunction. When the external pressure exceeds a set pressure, the relief valve releases pressure while the check valve replenishes oil (e.g., for hydraulic cylinders and motors). This protects the actuators and effectively prevents cavitation. Furthermore, this invention is designed as a stacked intelligent module, making maintenance, installation, and troubleshooting very convenient.

[0018] This invention, by adding mounting components and connecting rods, allows for quick assembly between two stacked valves. Subsequent inspection and maintenance only require removing the corresponding mounting components and connecting rods, making it extremely convenient to use. Furthermore, only the stacked valve to be inspected needs to be disassembled, eliminating the need for complete disassembly, thus reducing maintenance costs and making it more convenient and faster. Of course, mounting holes are also retained, allowing for assembly using traditional screws, making it very flexible in use. Attached Figure Description

[0019] Figure 1 This is a hydraulic schematic diagram of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the structure of this utility model. Figure 3 ;

[0023] Figure 5 This is a cross-sectional view of the present invention located at the center plane of the axis of connecting rod 410;

[0024] Figure 6 This is a cross-sectional view of the present invention located on another central plane where the axis of the connecting rod 410 is located;

[0025] Figure 7 This is a structural diagram of the component installation area;

[0026] Figure 8 This is a partial structural diagram of the component installation area. Figure 1 ;

[0027] Figure 9 This is a partial structural diagram of the component installation area. Figure 2 . Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] See Figure 1 The superimposed pressure-anti-cavitation functional valve of this embodiment includes a first overflow valve 110, a second overflow valve 120, a first check valve 210, a second check valve 220, ports B, A, TB, TA, and P, a first oil passage 321, a second oil passage 322, a third oil passage 323, a fourth oil passage 324, a fifth oil passage 325, a sixth oil passage 326, a seventh oil passage 327, a first channel 311, a second channel 312, and a third channel 313. The first oil passage 321 is connected to the TA port, the second oil passage 322 is connected to the P port, the third oil passage 323 is connected to the B port, the fourth oil passage 324 is connected to the A port, and the fifth oil passage 325 is connected to the TB port.

[0030] The third oil passage 323 is connected to one end of the first channel 311 and the outlet of the first check valve 210. The other end of the first channel 311 is connected to the first check connector MA. The oil inlet of the first overflow valve 110 is connected to the first channel 311, and the oil outlet is connected to the second channel 312 through the sixth oil passage 326. The sixth oil passage 326 is connected to the inlet of the first check valve 210.

[0031] The fourth oil passage 324 is connected to the third channel 313. One end of the third channel 313 is connected to the second one-way connector MB. The third channel 313 is connected to the oil inlet of the second relief valve 120. The oil outlet of the second relief valve 120 is connected to the seventh oil passage 327. The seventh oil passage 327 is connected to the second channel 312 and the outlet of the second one-way valve 220 respectively. The inlet of the second one-way valve 220 is connected to the fourth oil passage 324.

[0032] The second channel 312 is also connected to the first oil channel 321 and the fifth oil channel 325.

[0033] In use, ports A and B are connected to the two oil ports of the actuator (such as a hydraulic cylinder, hydraulic motor, etc.). The superimposed pressure / anti-cavitation function valve can protect the actuator (such as a hydraulic cylinder, hydraulic motor, etc.) from damage under external force when it is not working. When the external force pressure exceeds the set pressure, the first relief valve or the second relief valve releases pressure and overflows, while the first check valve or the second check valve can replenish oil (such as for hydraulic cylinders, hydraulic motors, etc.). Because overload protection can be achieved through overflow, the first check valve or the second check valve returns a portion of the overflowed hydraulic oil to the inlet of the first relief valve or the second relief valve to maintain oil pressure and prevent cavitation. In use, hydraulic oil can be added through the first check connector MA and the second check connector MB to prevent the oil pressure from dropping too quickly and forming cavitation.

[0034] See Figures 2-9The superimposed pressure-anti-cavitation functional valve includes a valve body 300. Figure 1 The structure and devices are all set or installed on the valve body 300, which has mounting holes 301. During use, a screw is passed through the mounting holes 301 to install and fix the entire valve body, or to assemble the stacked pressure-anti-cavitation function valve with other stacked valves to form a hydraulic system. However, in actual use, different lengths of screws need to be selected according to actual requirements, because different combination methods and different stacked valves have different requirements for screw length. Furthermore, when there are multiple stacked valves, repairing one requires disassembling all stacked valves, greatly increasing the workload. To address this, this embodiment adds a connecting rod 410 and a mounting assembly, which enables the assembly between two adjacent stacked valves.

[0035] The connecting rod 410 has a large end 420 at at least one end, and the diameter of the large end 420 is larger than the diameter of the connecting rod 410 to form a step.

[0036] The valve body 300 is also provided with a mounting groove 302, which communicates with the mounting hole 301. The mounting assembly is installed in the mounting groove 302. The mounting assembly includes a threaded sleeve 510, a stud 520, a pressing block 530, a connecting seat 540, and a slider 550. The upper and lower end faces of the pressing block 530 are respectively fitted and slidably assembled with the mounting groove 302. The threaded sleeve 510 is rotatably mounted on the valve body 300 but cannot move axially. One end of the threaded sleeve 510 protrudes from the valve body 300 and is provided with a hexagonal prism 511 to facilitate the passage of a socket wrench. The screw sleeve 510 is driven to rotate. The screw sleeve 510 is fitted onto the stud 520 and is screwed onto it. One end of the stud 520 is fitted onto the slider 550. The slider 550 is inserted into the connecting seat grooves 541 on both sides and is engaged and slidably fitted onto them. The connecting seat grooves 541 are located inside the connecting seat 540. The two sides of the slider 550 are respectively pressed or fitted onto one end of the spring 560. The other end of the spring 560 is pressed or fitted onto the inner wall of the connecting seat 540. The springs on both sides of the slider are used to generate elastic damping for the slider to slide relative to the connecting seat 540.

[0037] The extrusion block 530 is provided with an extrusion inclined surface 531 and an extrusion groove 532. The extrusion inclined surface 531 is in contact with the fixing inclined surface 331, which is located on the fixing block 330. The fixing block 330 is installed and fixed in the mounting groove 302. A push plate 610 is also engaged and slidably installed in the mounting groove 302. One side of the push plate 610 is assembled or pressed against one end of a push plate spring 620, and the other end of the push plate spring 620 is pressed against or assembled with the inner wall of the mounting groove 302. The push plate 610 applies a spring force to the extrusion block 530, pushing it towards the fixing block 330, so that the fixing inclined surface 331 and the extrusion inclined surface 531 remain in close contact. The extrusion groove 532 allows the larger end to pass through.

[0038] See Figure 5 Initially, the extrusion block 530 is located closest to the threaded sleeve 501, and the end face of the extrusion block 530 closest to the push plate 610 is closest to the fixed block 330. In use, the large end 420 is inserted into the mounting hole, allowing its end face to pass through the extrusion block 530. Then, the threaded sleeve 510 is rotated, causing the stud 520 to move axially, thus driving the extrusion block 530 away from the threaded sleeve 510 until the threaded sleeve reaches the corresponding torque. During this process, the extrusion inclined surface 531 engages with the fixed inclined surface 331, causing the extrusion block 530 to gradually move towards the large end 420. The side of the extrusion block 530 presses against the end of the large end, causing the large end 420 to move axially and tighten. If the other end of the connecting rod 410 is then assembled with another stacked valve, the stacked valve can be fixed to the stacked pressure-anti-cavitation function valve. Simultaneously, the slider slides relative to the connecting seat 540 during this process, thus counteracting the displacement of the extrusion block 530 in the width direction.

[0039] In some embodiments, a stop block 710 engages with and slides with a stop groove 303. One end of the stop block 710 is fitted or pressed against a stop spring 720, and the other end of the stop spring 720 is fitted or pressed against an end plate 730. The end plate 730 is mounted on the valve body 300. The stop spring 720 applies a spring force to the stop block 710 to push it toward the mounting hole 301, so that the end of the stop block 710 enters the mounting hole 301, thereby hindering the passage of the large end 420, and thus positioning the large end 420 axially.

[0040] In use, the large end is pressed against the stop block to achieve positioning of the large end. Then, the screw sleeve 510 is rotated to drive the large end 420 to press against the stop block 710. The large end and the inclined surface of the stop block are pressed against the stop block 710 to overcome the compression spring 720 and move down, so that the large end 420 can pass through and thus tighten the connecting rod 410.

[0041] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0042] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0044] In this application, a circumferentially rotatable assembly is a connection assembly that can rotate relative to each other, such as an assembly using bearings; a circumferentially rotatable but axially movable assembly is one that can rotate relative to each other but cannot move axially, such as by installing shaft clips on both sides of the shaft and the mounting device to prevent the shaft from moving axially; a circumferentially rotatable and axially movable assembly is a movable assembly, such as an assembly where the shaft passes through a shaft hole; an assembly that cannot rotate circumferentially but can move axially can be an assembly using spline grooves or spline mating.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A superimposed pressure-anti-cavitation function valve, characterized in that: The first overflow valve, the second overflow valve, the first check valve, the second check valve, the B port, the A port, the TB port, the TA port, the P port, the first oil channel, the second oil channel, the third oil channel, the fourth oil channel, the fifth oil channel, the sixth oil channel, the seventh oil channel, the first passage, the second passage, and the third passage are provided. The third oil channel is communicated with one end of the first passage and the outlet of the first check valve, the oil inlet of the first overflow valve is communicated with the first passage, the oil outlet is communicated with the second passage through the sixth oil channel, and the sixth oil channel is communicated with the inlet of the first check valve. The fourth oil channel is communicated with the third passage, the third passage is communicated with the oil inlet of the second overflow valve, the oil outlet of the second overflow valve is communicated with the seventh oil channel, the seventh oil channel is respectively communicated with the second passage and the outlet of the second check valve, and the inlet of the second check valve is communicated with the fourth oil channel.

2. The superimposed pressure-anti-gas pocket function valve according to claim 1, characterized in that: The first passage is communicated with the first one-way joint MA, and the third passage is communicated with the second one-way joint MB.

3. The superimposed pressure-anti-gas pocket function valve according to claim 1, characterized in that: The second passage is further communicated with the first oil channel and the fifth oil channel.

4. The stacked pressure-anti-gas pocket function valve according to any one of claims 1 to 3, characterized by: The valve body is provided with a mounting hole and a mounting assembly, and at least one end of the connecting rod is provided with a large end with a diameter larger than the connecting rod. The valve body is further provided with a mounting groove communicated with the mounting hole, and the mounting assembly is mounted in the mounting groove. The mounting assembly comprises a screw sleeve, a stud, an extrusion block, a connecting seat, and a sliding block.

5. The superimposed pressure-anti- gas pocket function valve according to claim 4, characterized in that: The upper and lower end faces of the extrusion block are respectively attached to and slidingly assembled with the mounting groove.

6. The superimposed pressure-anti- gas pocket function valve according to claim 4, characterized in that: The screw sleeve is mounted on the valve body, one end of the screw sleeve penetrates the valve body, the screw sleeve is sleeved on the stud and is threadedly assembled with the stud, one end of the stud is assembled with the sliding block, the sliding block is clamped into the connecting seat groove on both sides and is slidingly assembled with the connecting seat groove, the connecting seat groove is arranged on the inner side of the connecting seat, and the sliding block is pressed or assembled with one end of the spring on both sides.

7. The superimposed pressure-anti- gas pocket function valve according to claim 4, characterized in that: The extrusion block is provided with an extrusion inclined surface, the extrusion inclined surface is attached to a fixing inclined surface, the fixing inclined surface is arranged on a fixing block, the fixing block is mounted in the mounting groove, a push plate is clamped and slidingly mounted in the mounting groove, one side of the push plate is assembled or pressed with one end of a push plate spring, and the other end of the push plate spring is pressed or assembled with the inner wall of the mounting groove. One end of the screw sleeve penetrating the valve body is provided with a hexagonal prism. The extrusion block is further provided with an extrusion groove through which the large end passes. A stop block is clamped and slidingly assembled with a stop sliding groove on the valve body, one end of the stop block is assembled or pressed with a stop spring, the other end of the stop spring is assembled or pressed with an end plate mounted on the valve body, and the stop spring applies an elastic force to the stop block to push it towards the mounting hole.

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