Large-flow cartridge valve unit
By designing a large flow type cartridge valve unit, the connection and closing of the working oil port is controlled by the coordination between the plug-in and valve core, the problem of unstable hydraulic system of large forging equipment is solved, and the stability and control performance of the equipment are achieved. promote.
Patent Information
- Application Number
- CN202411740769.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-02-18
AI Technical Summary
In the hydraulic system of large forging equipment, the hydraulic system is unstable when controlling large flow of oil, resulting in safety hazards and lack of control performance.
A large flow type cartridge valve unit is designed. Through the combination of the valve body assembly and the valve sleeve assembly, the insertion part is embedded in the insertion groove, and the valve core extends or contracts in the valve body to control the working oil port. Connect and close. This design reduces the space occupied by the support structure through limit coordination, increases the inner diameter and flow space of the working oil port, and improves oil circulation capacity.
It effectively solves the problem of unstable hydraulic system during high-speed operation of large forging equipment, ensures the stability and control performance of the equipment, and reduces maintenance costs.
Smart Images
Figure CN119467467A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of power units, and more specifically, to a large-flow cartridge valve unit. Background Art
[0002] With the gradual promotion of domestic hydraulic transmission equipment, the working speed and production efficiency of large forging equipment are constantly improving, which puts higher requirements on the two-way cartridge valve unit of the hydraulic system. Especially in the forging industry, large flows of tens of thousands of liters need to be controlled. The combination control method of using a two-way cartridge valve as the power stage and an electromagnetic reversing valve as the pilot stage has always been the first. The large flow and high pressure oil of the hydraulic control circuit is turned on and off to solve the problems of high back pressure, low efficiency and fast temperature rise of the hydraulic control circuit.
[0003] However, in the hydraulic system of large forging equipment actually used, when a large flow of oil passes through the hydraulic control circuit of the large forging equipment, the instability of the hydraulic system brings great safety hazards and loss of control performance to the large forging equipment.
[0004] Therefore, solving the stability of the hydraulic system of the two-way cartridge valve unit that controls large flow rates of oil has become a technical challenge that needs to be overcome urgently. Summary of the invention
[0005] One object of the present application is to provide a new technical solution for a large flow type cartridge valve unit.
[0006] According to one aspect of the present application, a large flow cartridge valve unit is provided. The large flow cartridge valve unit comprises a valve body assembly and a valve sleeve assembly, wherein the valve body assembly comprises a valve body and a valve cover, wherein the valve body and the valve cover are detachably connected, wherein the valve body has an inserting slot and a working oil port, wherein the inserting slot is connected to the working oil port; wherein the valve sleeve assembly comprises an inserting portion and a valve core, wherein the valve core is movably arranged on the inserting portion, wherein the inserting portion is embedded in the inserting slot, and wherein one end of the inserting portion extends out of the inserting slot and abuts against the valve cover, wherein the opposite ends of the inserting portion respectively form a limit fit with the valve cover and the inserting slot.
[0007] Optionally, the end of the insertion groove away from the working oil port has a step surface, and when the valve body assembly is connected to the valve sleeve assembly, the end of the insertion part extending out of the insertion groove is embedded in the step surface, and the valve cover, the step surface and the insertion part form a limiting fit in the axial direction of the valve body assembly.
[0008] Optionally, the valve cover has a first limiting groove, and when the valve body assembly is connected to the valve sleeve assembly, the end of the inserting portion extending out of the inserting groove is embedded in the first limiting groove, and the first limiting groove and the valve body form a limiting fit with the inserting portion on both sides of the axial direction of the valve body assembly.
[0009] Optionally, the valve cover comprises a cover plate, and the first limiting groove is arranged on the cover plate, wherein the cover plate has a damping hole, and when the valve cover assembly is connected to the valve sleeve assembly, the damping hole is communicated with the insertion part.
[0010] Optionally, the valve cover further includes an end cover, the insert portion has a second limiting groove, and when the valve body assembly is connected to the valve sleeve assembly, the end cover is embedded in the second limiting groove, and the end cover forms a limiting fit with the insert portion.
[0011] Optionally, the end cover has a protruding portion, and the valve cover has a recessed portion that forms a limiting fit with the protruding portion, and when the valve body assembly is connected to the valve sleeve assembly, the protruding portion is embedded in the recessed portion.
[0012] Optionally, the insertion part has a cavity, which is connected to the damping hole. The valve core is arranged in the cavity. When the valve core extends out of the cavity to a side away from the damping hole, the valve core is in an extended state, and when the valve core retracts into the cavity, the valve core is in a retracted state.
[0013] Optionally, the working oil port includes a first oil port and a second oil port, and the insertion slot and the second oil port are respectively arranged on opposite sides of the first oil port, wherein the valve core has an extended state and a retracted state, when the valve core is in the extended state, the first oil port and the second oil port are in a non-connected state, and when the valve core is in the retracted state, the first oil port and the second oil port are in a connected state.
[0014] Optionally, the valve body has an empty knife slot hole, which is connected to the second oil port, and the empty knife slot hole is arranged around the insertion part as the center; when the valve core is in a retracted state, the first oil port, the empty knife slot hole and the second oil port are in a connected state, and when the valve core is in an extended state, the second oil port is connected to the empty knife slot hole to form a flow channel, and the first oil port and the flow channel are in a disconnected state.
[0015] Optionally, the valve sleeve assembly further comprises an elastic member, which is arranged on the inserting portion, and one end of the elastic member abuts against the valve cover, and the other end of the elastic member abuts against the valve core.
[0016] In the embodiment of the present application, the insert part is embedded in the insert groove to limit the position of the insert part in the valve body, so that the valve core extends or contracts in the valve body to control the closing or connection between multiple working oil ports. The end of the insert part away from the working oil port forms a limit fit with the valve cover and the valve body to limit the position in the valve body assembly, thereby reducing the internal space occupied by the supporting structure for supporting the insert part provided in the working oil port, effectively increasing the inner diameter of the pipeline of the working oil port, increasing the flow space of the working oil port, and improving the oil flow capacity of the valve body, thereby solving the problem caused by the instability of the hydraulic system of large forging equipment during high-speed operation and ensuring the stability of the equipment.
[0017] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.
[0019] Figure 1 is a schematic diagram of the valve core extending state in the embodiment of the present application; Figure 2 It is a schematic diagram of the structure of the insertion part and the end cover in the embodiment of the present application.
[0020] Description of reference numerals: 1- Valve body assembly; 11-valve body; 111-empty knife slot hole; 12-valve cover; 121-first limiting groove; 1211-recessed portion; 122-cover plate; 1221-damping hole; 123-end cover; 1231-protrusion; 1232-third sealing ring; 1233-fourth sealing ring; 13-insertion slot; 14-working oil port; 141-first oil port; 142-second oil port; 2-valve sleeve assembly; 21-insertion part; 211-second limiting groove; 212-cavity; 213-first sealing ring 22-valve core; 221-second sealing ring; 23-Elastic member. DETAILED DESCRIPTION
[0021] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application.
[0022] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.
[0023] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.
[0024] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.
[0025] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0026] According to an embodiment of the present application, a large flow cartridge valve unit is provided. The large flow cartridge valve unit includes a valve body assembly 1 and a valve sleeve assembly 2, wherein the valve body assembly 1 includes a valve body 11 and a valve cover 12, wherein the valve body 11 and the valve cover 12 are detachably connected, wherein the valve body 11 has an inserting slot 13 and a working oil port 14, wherein the inserting slot 13 is connected to the working oil port 14; wherein the valve sleeve assembly 2 includes an inserting portion 21 and a valve core 22, wherein the valve core 22 is movably arranged on the inserting portion 21, wherein the inserting portion 21 is embedded in the inserting slot 13, and one end of the inserting portion 21 extends out of the inserting slot 13 and abuts against the valve cover 12, and the opposite ends of the inserting portion 21 respectively form a limit fit with the valve cover 12 and the inserting slot 13.
[0027] like Figure 1 to Figure 2 As shown, the cartridge valve unit includes a valve body assembly 1 and a valve sleeve assembly 2. The valve body assembly 1 includes a valve body 11 and a valve cover 12. The valve sleeve assembly 2 is arranged in the valve body 11. The valve cover 12 is detachably connected to the valve body 11, so as to facilitate the inspection and / or replacement of the valve sleeve assembly 2 and reduce the maintenance cost.
[0028] The insertion groove 13 of the valve body 11 is communicated with the working oil ports 14 , so that the valve sleeve assembly 2 can be inserted into the insertion groove 13 , so as to communicate and / or close the multiple working oil ports 14 through the valve sleeve assembly 2 .
[0029] The valve body 11 and the valve cover 12 can be detachably connected by means of a snap connection, a threaded connection, or the like.
[0030] Of course, in the embodiment of the present application, the valve body assembly 1 is not limited to the above structure, and those skilled in the art can configure it according to actual needs. For example, the valve body 11 and the valve cover 12 can be connected by welding, bonding, etc.
[0031] The valve sleeve assembly 2 includes an insert portion 21 and a valve core 22. The valve core 22 is arranged in the insert slot 13 through the insert portion 21, so as to fix the position of the valve core 22 in the valve body 11, so that the valve core 22 switches between an extended state and a retracted state to close and / or open the communication between the plurality of working oil ports 14.
[0032] One end of the inserting portion 21 is embedded in the inserting groove 13, and the top of the inserting portion 21 extends out of the inserting groove 13. The valve cover 12 is detachably connected to the valve body 11, so that the top of the inserting portion 21 is embedded in the valve cover 12. The valve cover 12 is connected to the valve body 11, so that the top of the inserting portion 21 defines the position of the inserting portion 21 in the valve body assembly 1.
[0033] For example, a mounting groove is provided at the bottom of the valve cover 12, an internal thread is provided on the inner wall of the mounting groove, an external thread matching the internal thread is provided on the outer wall of the end of the inserting portion 21 extending out of the inserting groove 13, and the top of the inserting portion 21 is threadedly connected to the valve cover 12. When the valve cover 12 is connected to the valve body 11, one end of the inserting portion 21 is embedded in the inserting groove 13, and the other end is threadedly connected to the valve cover 12, thereby limiting the position of the inserting portion 21 in the valve body assembly 1. There is no need to provide a supporting portion in the working oil port 14 to support the inserting portion 21, so as to achieve the position limitation of the inserting portion 21, effectively reduce the component settings in the working oil port 14, and increase the flow pipe diameter of the working oil port 14.
[0034] Of course, in the embodiment of the present application, the inserting portion 21 and the valve body assembly 1 are not limited to the above structure, and those skilled in the art can configure it according to actual needs. For example, the end of the inserting portion 21 extending out of the inserting slot 13 can also be connected to the valve cover 12 in a snap-fit manner.
[0035] In the embodiment of the present application, the insertion part 21 is embedded in the insertion groove 13 to limit the position of the insertion part 21 in the valve body 11, so that the valve core 22 extends or retracts in the valve body 11, and switches between the extended state and the retracted state to control the closing or connection between multiple working oil ports 14. The end of the insertion part 21 away from the working oil port 14 forms a limit fit with the valve cover 12 and the valve body 11 to limit the position in the valve body assembly 1, so as to reduce the internal space occupied by the supporting structure for supporting the insertion part 21 in the working oil port 14, effectively increase the inner diameter of the pipeline of the working oil port 14, increase the flow space of the working oil port 14, and improve the oil passing capacity of the valve body 11, thereby solving the problems of high flow back pressure, poor control stability, high oil system temperature, fast oil aging, short life, many leakage points, low power transmission efficiency, etc. when large forging equipment is running at high speed, thereby ensuring the stability of the equipment.
[0036] In addition, the valve cover 12 is detachably connected to the valve body 11, which is easy to install and disassemble, convenient to debug, and easy to troubleshoot when a fault occurs, and convenient to repair and / or replace the valve sleeve assembly 2, effectively reducing the maintenance cost of the cartridge valve unit. At the same time, the cartridge valve unit has a low manufacturing cost and is also suitable for popularization in other similar hydraulic equipment.
[0037] In one example, one end of the insertion groove 13 away from the working oil port 14 has a step surface, and when the valve body assembly 1 is connected to the valve sleeve assembly 2, the end of the insertion portion 21 extending out of the insertion groove 13 is embedded in the step surface, and the valve cover 12, the step surface and the insertion portion 21 form a limiting fit in the axial direction of the valve body assembly 1.
[0038] In the embodiment of the present application, the valve body 11 has an insertion slot 13, the insertion slot 13 has a bottom and a top, and the bottom of the insertion slot 13 is connected to the working oil port 14. The insertion portion 21 is embedded in the insertion slot 13, and the valve core 22 is located in the insertion portion 21. When the valve core 22 is in an extended state, the bottom of the valve core 22 extends out of the bottom of the insertion slot 13 and extends into the working oil port 14, and the communication passages between the multiple working oil ports 14 are closed by the valve core 22. When the valve core 22 is in a retracted state, the valve core 22 is in the insertion portion 21, and the multiple working oil ports 14 are connected.
[0039] When the insertion portion 21 is located in the insertion slot 13 , the position of the insertion portion 21 in the insertion slot 13 needs to be limited so that the closure and / or connection between multiple working oil circuits can be achieved when the valve core 22 switches between the extended state and the retracted state.
[0040] like Figure 1 to Figure 2 As shown, the longitudinal section of the insertion portion 21 is T-shaped. By providing a step surface at the top of the insertion groove 13, the top of the insertion portion 21 can be snapped onto the step surface. The step surface is matched with the shape structure of the insertion portion 21 to limit the position of the insertion portion 21 in the insertion groove 13 along the axial direction of the valve body assembly 1.
[0041] In one example, the valve cover 12 has a first limiting groove 121. When the valve body assembly 1 is connected to the valve sleeve assembly 2, the end of the insert portion 21 extending out of the insert groove 13 is embedded in the first limiting groove 121. The first limiting groove 121 and the valve body 11 form a limiting fit with the insert portion 21 on both sides of the axial direction of the valve body assembly 1.
[0042] like Figure 1 to Figure 2As shown, the lower surface of the valve cover 12 has a first limiting groove 121, the diameter of the first limiting groove 121 is larger than the diameter of the insertion groove 13, and the diameter of the first limiting groove 121 matches the diameter of the top of the insertion portion 21. When the valve cover 12 assembly is connected to the valve sleeve assembly 2, the top of the insertion portion 21 overlaps the top of the insertion groove 13, and the top of the insertion portion 21 is located in the first limiting groove 121, and is connected to the valve body 11 through the cover plate 122, so that the top of the insertion portion 21 is limited between the cover plate 122 and the valve body 11, thereby limiting the position of the insertion portion 21 in the axial direction of the valve body assembly 1.
[0043] Of course, in the embodiment of the present application, the inserting portion 21 and the valve body assembly 1 are not limited to the above structure, and those skilled in the art can make configurations according to actual needs. For example, the inserting portion 21 can be threadedly connected to the cover plate 122 and / or the valve body 11 .
[0044] In one example, the valve cover 12 includes a cover plate 122, and the first limiting groove 121 is arranged on the cover plate 122, wherein the cover plate 122 has a damping hole 1221, and when the valve cover 12 assembly is connected to the valve sleeve assembly 2, the damping hole 1221 is connected to the insertion part 21.
[0045] like Figure 1 to Figure 2 As shown, the valve cover 12 includes a cover plate 122, which is a plug-in valve unit control cover plate 122. The cover plate 122 is detachably connected to the valve body 11. The cover plate 122 is arranged on the top of the valve body 11, and the top of the plug-in part 21 is located between the cover plate 122 and the valve body 11.
[0046] A damping hole 1221 is formed on the cover plate 122 , and oil enters the inserting portion 21 through the damping hole 1221 , so that the valve core 22 is switched between an extended state and a retracted state.
[0047] In one example, the valve cover 12 also includes an end cover 123, and the insert portion 21 has a second limiting groove 211. When the valve body assembly 1 is connected to the valve sleeve assembly 2, the end cover 123 is embedded in the second limiting groove 211, and the end cover 123 forms a limiting fit with the insert portion 21.
[0048] like Figure 1 to Figure 2 As shown, the valve cover 12 also includes an end cover 123. A first limiting groove 121 is provided on one side of the cover plate 122 close to the valve body 11. The shape and size of the end cover 123 match the first limiting groove 121. When the valve body 11 and the valve cover 12 are connected, the end cover 123 is embedded in the first limiting groove 121.
[0049] The bottom of the inserting part 21 is embedded in the inserting groove 13, the top diameter of the inserting part 21 is larger than the diameter of the inserting groove 13, and the inserting part overlaps the upper surface of the valve body 11. The top of the inserting part is provided with a second limiting groove 211, and the second limiting groove 211 forms a step surface on the inserting part. When the valve body assembly 1 is connected to the valve sleeve assembly 2, the top of the inserting part 21 is embedded in the first limiting groove 121 of the cover plate 122, and the end cover 123 is embedded in the second limiting groove 211 of the inserting part 21. The valve cover 12 is connected to the valve body 11, so that the valve cover 12 and the valve body 11 form a limiting fit with the inserting part 21 as the center, so as to limit the position of the inserting part 21 in the axial direction of the valve body assembly 1.
[0050] In one example, the end cover 123 has a protrusion 1231, and the valve cover 12 has a recessed portion 1211 that forms a limiting fit with the protrusion 1231. When the valve body assembly 1 is connected to the valve sleeve assembly 2, the protrusion 1231 is embedded in the recessed portion 1211.
[0051] like Figure 1 to Figure 2 As shown, the valve cover 12 further includes a cover plate 122 and an end cover 123. The cover plate 122 has a first limiting groove 121 on one side close to the valve body 11. The first limiting groove 121 has a recessed portion 1211 on one side away from the valve body 11. The end cover 123 has a protruding portion 1231 matching the recessed portion 1211 on one side away from the valve body 11. When the valve body 11 is connected to the valve cover 12, the end cover 123 is embedded in the first limiting groove 121, and the protruding portion 1231 is embedded in the recessed portion 1211.
[0052] like Figure 1 to Figure 2 As shown, the bottom of the inserting part 21 is embedded in the inserting groove 13, the top diameter of the inserting part 21 is larger than the diameter of the inserting groove 13, and the plug-in part overlaps the upper surface of the valve body 11. A second limiting groove 211 is provided on the top of the plug-in part, and the second limiting groove 211 forms a step surface on the plug-in part. When the valve body assembly 1 is connected to the valve sleeve assembly 2, the top of the inserting part 21 is embedded in the first limiting groove 121 of the cover plate 122, the end cover 123 is embedded in the second limiting groove 211 of the inserting part 21, and the protrusion 1231 is embedded in the recessed part 1211. The valve cover 12 is connected to the valve body 11, so that the valve cover 12 and the valve body 11 form a limiting fit with the inserting part 21 as the center. Not only the position of the inserting part 21 in the axial direction of the valve body assembly 1 is limited by the cover plate 122, but also the radial direction of the inserting part 21 can be limited by the end cover 123.
[0053] In one example, the insertion portion 21 has a cavity 212, which is connected to the damping hole 1221. The valve core 22 is arranged in the cavity 212. When the valve core 22 extends out of the side of the cavity 212 away from the damping hole 1221, the valve core 22 is in an extended state, and when the valve core 22 retracts into the cavity 212, the valve core 22 is in a retracted state.
[0054] like Figure 1 to Figure 2 As shown, the inserting part 21 has a cavity 212, and the top of the cavity 212 is connected to the second limiting groove 211. The top of the inserting part 21 is sealed by the end cover 123. A damping hole 1221 is provided on the end plate, and the damping hole 1221 is connected to the damping hole 1221 of the cover plate 122. By connecting the damping hole 1221 of the cover plate 122 with the damping hole 1221 of the end plate, oil can enter the cavity 212 of the inserting part 21, so that the valve core 22 provided in the inserting part 21 can be switched between the extended state and the retracted state, so as to close and / or connect multiple working oil ports 14.
[0055] For example, Figure 1 to Figure 2 As shown, the valve body 11 has a first oil port 141 and a second oil port 142. The first oil port 141, the second oil port 142 and the insertion slot 13 are connected. When the valve body assembly 1 is connected to the valve sleeve assembly 2, the insertion portion 21 is embedded in the insertion slot 13, and the oil enters the cavity 212 of the insertion portion 21 through the damping hole 1221. When the hydraulic pressure in the cavity 212 is greater than the pressure in the first oil port 141, the valve core 22 extends out of the insertion slot 13 and closes the communication channel between the first oil port 141 and the second oil port 142. At this time, the valve core 22 is in an extended state. When the hydraulic pressure in the first oil port 141 is greater than the pressure in the cavity 212, the valve core 22 shrinks back into the cavity 212, and the communication channel between the first oil port 141 and the second oil port 142 is opened. At this time, the valve core 22 is in a retracted state.
[0056] In one example, the working oil port 14 includes a first oil port 141 and a second oil port 142, and the insertion slot 13 and the second oil port 142 are respectively arranged on opposite sides of the first oil port 141, wherein the valve core 22 has an extended state and a retracted state, when the valve core 22 is in the extended state, the first oil port 141 and the second oil port 142 are in a non-connected state, and when the valve core 22 is in the retracted state, the first oil port 141 and the second oil port 142 are in a connected state.
[0057] like Figure 1 to Figure 2As shown, the working oil port 14 includes a first oil port 141 and a second oil port 142. The first oil port 141 and the insertion slot 13 are respectively located on opposite sides of the second oil port 142, for example, the insertion slot 13 is located above the second oil port 142, and the first oil port 141 is located below the second oil port 142.
[0058] The valve cover 12 is connected to the valve body 11 to define the position of the insertion portion 21 in the insertion groove 13. When the valve core 22 is in the extended state, the valve core 22 extends into the first oil port 141 to close the communication passage between the first oil port 141 and the second oil port 142. When the valve core 22 is in the retracted state, the valve core 22 retracts back into the cavity 212, and the first oil port 141 and the second oil port 142 are communicated.
[0059] In one example, the valve body 11 has an empty knife slot hole 111 , the empty knife slot hole 111 is communicated with the second oil port 142 , and the empty knife slot hole 111 is arranged around the insertion portion 21 as the center.
[0060] like Figure 1 to Figure 2 As shown, an empty knife slot hole 111 connected to the second oil port 142 is provided in the valve body 11, and the empty knife slot hole 111 is provided with the valve core 22 as the center. When the valve core 22 is in a contracted state, the first oil port 141, the second oil port 142, and the empty knife slot hole 111 are in a connected state, and when the valve core 22 is in an extended state, the empty knife slot hole 111 is connected to the second oil port 142 to form a circulation channel, but in this state, the communication channel of the first oil port 141 is closed, and at this time, the first oil port 141 and the circulation channel are in a disconnected state.
[0061] When a large flow of oil passes through the hydraulic control circuit of a large forging equipment, the empty knife slot hole 111 increases the oil flow path and flow space, effectively solving the problems of high back pressure, low efficiency and fast temperature rise in the hydraulic control circuit. In addition, the top of the insert 21 is positioned by the valve cover 12 and the valve body 11, effectively reducing the influence of the support structure provided in the working oil port 14 to carry the internal space of the working oil port 14 occupied by the insert 21, increasing the inner diameter of the pipeline of the working oil port 14, increasing the flow space of the working oil port 14, and improving the oil passing capacity of the valve body 11.
[0062] In an example, the valve sleeve assembly 2 further includes an elastic member 23 , which is disposed on the inserting portion 21 , and one end of the elastic member 23 abuts against the valve cover 12 , and the other end of the elastic member 23 abuts against the valve core 22 .
[0063] like Figure 1 to Figure 2 As shown, the elastic member 23 is a spring, which is disposed in the cavity 212, and opposite ends of the spring are respectively connected to the end cover 123 and the valve core 22. The spring can be extended and retracted along the axial direction of the valve body 11.
[0064] By setting a spring between the end cover 123 and the valve core 22, when the pressure in the cavity 212 and the first oil port 141 is equal, the pre-pressure of the spring is used to hold the valve core 22 so that the valve core 22 is in an extended state, thereby making the first oil port 141 and the second oil port 142 in a closed state.
[0065] For example, the inserting part 21 is installed into the inserting groove 13, and the inserting part 21 is confined in the valve body 11 through the valve cover 12 and the valve body 11, and the cover plate 122 is fixedly sleeved on the inserting part 21 and the end cover 123 by means of screws or the like. The valve body 11 has a first oil port 141 and a second oil port 142, and the first oil port 141 and the second oil port 142 can be connected to a pump source or an actuator, and the first oil port 141 and the second oil port 142 realize the opening and closing functions through the action of the valve core 22. The opening and closing of the valve core 22 is determined by whether there is pressurized oil in the cavity 212 of the inserting part 21. The cavity 212 is introduced with pressure oil through the damping hole 1221 of the cover plate 122, and is connected to the cavity 212 of the inserting part 21 through the damping hole 1221 of the end cover 123. When the pressure in the cavity 212 is greater than the pressure of the first oil port 141, the valve core 22 extends out of the cavity 212, and the first oil port 141 and the second oil port 142 are forcibly closed. When the cavity 212 is discharged from the damping hole 1221 of the cover plate 122, the valve core 22 is pushed by the pressure oil of the first oil port 141 and / or the second oil port 142, and the valve core 22 shrinks back to the cavity 212 and moves in the opening direction. At this time, the spring is compressed, the valve core 22 is in a contracted state, and the first oil port 141 is connected to the second oil port 142.
[0066] In one example, the insert portion 21 has a first sealing ring 213, the valve core 22 is provided with a second sealing ring 221, the end cover 123 is provided with a third sealing ring 1232 and a fourth sealing ring 1233, the third sealing ring 1232 is abutted against the inner wall of the second limiting groove 211, the fourth sealing ring 1233 is provided on the protruding portion 1231, and the fourth sealing ring 1233 is abutted against the valve cover 12.
[0067] The working principle of the cartridge valve unit is as follows: When a large flow of oil enters the first oil port 141, the inserting part 21 and the valve core 22 are simultaneously subjected to the thrust of the oil. The inserting part 21 is fixed on the inserting slot 13 by the cover plate 122 and will not move. The valve core 22 is affected by the pressure in the cavity 212 to achieve opening and closing. When high-pressure oil is introduced into the damping part of the cover plate 122 and connected to the cavity 212 through the damping hole 1221 of the end cover 123, the combined force of the pre-pressure of the spring forces the valve core 22 to be closed, and the large flow of oil cannot flow.
[0068] When the damping hole 1221 of the cover plate 122 discharges oil, the oil in the cavity 212 flows out to the damping hole 1221 of the end cover 123 and enters the damping hole 1221 of the cover plate 122, so that the pressure in the cavity 212 is close to zero. Since there is a certain thrust at the first oil port 141 to overcome the pre-pressure of the spring, the valve core 22 is pushed to realize the opening function. After the valve core 22 is pushed to the end cover 123, it remains stationary. At this time, a large flow of oil passes through the first oil port 141 and enters the second oil port 142, realizing the connection function of a large flow of oil.
[0069] The top of the insert part 21 is positioned by the valve cover 12 and the valve body 11, thereby limiting the position of the insert part 21 in the valve body 11, thereby reducing the internal space of the working oil port 14 occupied by the supporting structure provided in the working oil port 14 to support the insert part 21, and effectively increasing the inner diameter size of the working oil port 14 and the flow space of the oil.
[0070] The hole diameter at the first oil port 141 is more than 1.8 times larger than that of traditional products because the oil hole here does not need to be stepped to support the insert 21. The diameter of the second oil port 142 is more than 1.5 times larger than that of traditional products. At the same time, the hole periphery in the middle of the valve sleeve is processed with an empty knife slot hole 111 that is more than 1.5 times the outer diameter of the valve sleeve, because the empty knife slot hole 111 can make the flow resistance of the oil around the insert 21 smaller. In this way, the back pressure is greatly reduced when the large flow rate of oil flows. Low back pressure circulation is achieved under large flow conditions of the hydraulic system of large forging equipment, achieving efficient and stable control.
[0071] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.
Claims
1. A large flow cartridge valve unit, characterized in that: include: A valve body assembly (1) comprises a valve body (11) and a valve cover (12), wherein the valve body (11) and the valve cover (12) are detachably connected, the valve body (11) has an insertion groove (13) and a working oil port (14), and the insertion groove (13) is in communication with the working oil port (14); A valve sleeve assembly (2), the valve sleeve assembly (2) comprising an inserting portion (21) and a valve core (22), the valve core (22) being movably arranged on the inserting portion (21), the inserting portion (21) being embedded in the inserting slot (13), and one end of the inserting portion (21) extending out of the inserting slot (13) to abut against the valve cover (12), and opposite ends of the inserting portion (21) respectively forming a limit fit with the valve cover (12) and the inserting slot (13).
2. The large flow cartridge valve unit according to claim 1, characterized in that: An end of the insertion groove (13) away from the working oil port (14) has a step surface, and when the valve body assembly (1) is connected to the valve sleeve assembly (2), an end of the insertion portion (21) extending out of the insertion groove (13) is embedded in the step surface, and the valve cover (12), the step surface and the insertion portion (21) form a limiting fit in the axial direction of the valve body assembly (1).
3. The large flow cartridge valve unit according to claim 1, characterized in that: The valve cover (12) has a first limiting groove (121); when the valve body assembly (1) is connected to the valve sleeve assembly (2), the end of the inserting portion (21) extending out of the inserting groove (13) is embedded in the first limiting groove (121); the first limiting groove (121) and the valve body (11) form a limiting fit with the inserting portion (21) on both sides in the axial direction of the valve body assembly (1).
4. The large flow cartridge valve unit according to claim 3, characterized in that: The valve cover (12) comprises a cover plate (122), the first limiting groove (121) being arranged on the cover plate (122), wherein the cover plate (122) has a damping hole (1221), and when the valve cover (12) assembly is connected to the valve sleeve assembly (2), the damping hole (1221) is in communication with the insertion portion (21).
5. The large flow cartridge valve unit according to claim 4, characterized in that: The valve cover (12) further comprises an end cover (123), the inserting portion (21) having a second limiting groove (211), and when the valve body assembly (1) is connected to the valve sleeve assembly (2), the end cover (123) is embedded in the second limiting groove (211), and the end cover (123) forms a limiting fit with the inserting portion (21).
6. The large flow cartridge valve unit according to claim 5, characterized in that: The end cover (123) has a protruding portion (1231), and the valve cover (12) has a recessed portion (1211) that forms a limiting fit with the protruding portion (1231); when the valve body assembly (1) and the valve sleeve assembly (2) are in a state of being connected, the protruding portion (1231) is embedded in the recessed portion (1211).
7. The large flow cartridge valve unit according to claim 4, characterized in that: The inserting portion (21) has a cavity (212), the cavity (212) being in communication with the damping hole (1221), the valve core (22) being arranged in the cavity (212), and when the valve core (22) extends out of the cavity (212) to a side away from the damping hole (1221), the valve core (22) is in an extended state, and when the valve core (22) retracts into the cavity (212), the valve core (22) is in a retracted state.
8. The large flow cartridge valve unit according to claim 1, characterized in that: The working oil port (14) comprises a first oil port (141) and a second oil port (142), the insertion groove (13) and the second oil port (142) are respectively arranged on opposite sides of the first oil port (141). The valve core (22) has an extended state and a retracted state. When the valve core (22) is in the extended state, the first oil port (141) and the second oil port (142) are in a non-connected state. When the valve core (22) is in the retracted state, the first oil port (141) and the second oil port (142) are in a connected state.
9. The large flow cartridge valve unit according to claim 8, characterized in that: The valve body (11) has an empty knife slot hole (111), the empty knife slot hole (111) is in communication with the second oil port (142), and the empty knife slot hole (111) is arranged around the insertion portion (21) as the center; When the valve core (22) is in a retracted state, the first oil port (141), the empty knife slot hole (111) and the second oil port (142) are in a connected state; when the valve core (22) is in an extended state, the second oil port (141) is connected to the empty knife slot hole (111) to form a flow channel, and the first oil port (141) and the flow channel are in a disconnected state.
10. The large flow cartridge valve unit according to claim 1, characterized in that: The valve sleeve assembly (2) further comprises an elastic member (23), wherein the elastic member (23) is arranged on the insertion portion (21), and one end of the elastic member (23) abuts against the valve cover (12), and the other end abuts against the valve core (22).