Low-temperature-rise electromagnetic directional valve
By optimizing the oil passage layout using low-power electromagnets and dual-spring assemblies, the problems of easy temperature rise and high energy loss in electromagnetic directional valves were solved, enabling their application in temperature-sensitive equipment and reducing costs.
Patent Information
- Application Number
- CN202422709312.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-06
AI Technical Summary
Existing electromagnetic directional valves are prone to temperature rise during use, resulting in significant energy loss in the hydraulic system and large impact forces during directional switching, making them unsuitable for use in temperature-sensitive equipment.
The design employs a low-power electromagnet and a dual-spring assembly, combined with an optimized oil passage layout, including through holes and multiple oil passages, to reduce fluid pressure loss and minimize valve core switching shock through the dual-spring assembly.
It reduces the temperature rise of the electromagnetic directional valve, reduces energy loss, lowers operating costs, and enables its application in temperature-sensitive equipment, while also reducing the directional impact force on the valve core.
Smart Images
Figure CN223498298U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fluid control valves, specifically to a cryogenic solenoid directional valve. Background Technology
[0002] Directional control valves are common fluid control valves, typically used to control the direction of fluid flow. Generally, a directional control valve body has a valve core through-hole and multiple flow channels, with the valve core usually moved by an electromagnet and springs at both ends. By selectively opening or closing the connection between the flow channels through different structures and displacements of the valve core, the working fluid flows in a controlled manner within the flow channels. During operation, the fluid is affected by the frictional force of the flow channel walls. As it flows through the channels, the fluid pressure continuously decreases, resulting in pressure loss. Excessive pressure loss increases energy consumption in the hydraulic system, leading to energy waste. Furthermore, the valve core uses a single spring design at both ends, resulting in a large impact force during valve core reversal.
[0003] Currently, the electromagnets used in electromagnetic directional control valves on the market have a power of 30W to 35W, and the electrical control part needs to be controlled by a relay. Although high-power electromagnets can provide greater thrust and more stable directional control under high-pressure conditions, on the one hand, high-power electromagnets require relay control in the electrical control part, which increases usage costs; on the other hand, conventional high-power electromagnetic directional control valves have significant performance redundancy under low-pressure and low-flow conditions; and furthermore, electromagnetic directional control valves experience a significant temperature rise during operation, making them unsuitable for use in temperature-sensitive equipment. Utility Model Content
[0004] Therefore, in order to overcome the shortcomings of the prior art, this utility model provides a low-temperature solenoid directional valve to solve the problems of easy temperature rise, hydraulic system energy loss, and large impact force during the directional valve operation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature electromagnetic reversing valve, characterized in that it comprises: a valve body, a valve core, a low-power electromagnet, and a double spring assembly;
[0006] A through hole is provided inside the valve body;
[0007] The valve core is installed in the through hole and can move relative to the valve body to achieve the closure or connection of different oil passages in the valve body;
[0008] Two sets of dual-spring assemblies are symmetrically arranged on both sides of the valve core. Each set of dual-spring assemblies includes a first reset spring and a second reset spring. The first reset spring is sleeved on the outside of the second reset spring. The two sets of dual-spring assemblies are used to reduce the reversing impact of the valve core.
[0009] The low-power electromagnet is disposed at at least one end of the valve body and is used to drive the valve core to move relative to the valve body.
[0010] The valve body has an A port, a B port, a P port, and two T ports on its bottom surface. A first oil passage, a second oil passage, a third oil passage, a fourth oil passage, and a fifth oil passage are sequentially arranged along the extension direction of the through hole. A sixth oil passage is arranged between the through hole and the bottom surface of the valve body, and the sixth oil passage connects the first oil passage and the fifth oil passage. The second oil passage is connected to the A port, the third oil passage is connected to the P port, the fourth oil passage is connected to the B port, and the sixth oil passage is connected to the two T ports.
[0011] Specifically, the first reset spring and the second reset spring have opposite directions of rotation, and the size ratio of the first reset spring to the second reset spring is 2:1.
[0012] Specifically, the ratio of the elastic coefficients of the first return spring to the second return spring is 20:3.
[0013] Specifically, the valve core is provided with a first boss, a step, and a second boss in sequence along its axial direction; the first boss and the second boss are used to open and close the oil passages in the valve body; the height of the step is lower than that of the first boss and the second boss.
[0014] Specifically, the step includes two inclined surfaces that form a reversing hydraulic buffer surface.
[0015] Specifically, the included angle between the two inclined planes is 50° to 130°.
[0016] Specifically, the step includes two arc surfaces, one end of which intersects to form a reversing hydraulic buffer surface.
[0017] Specifically, the two T-ports and the P-port on the valve body are respectively located on both sides of the projection of the through hole onto the bottom surface of the valve body, and the sixth oil passage is located directly above the two T-ports.
[0018] Specifically, the valve body above the through hole is reduced in material, and the ratio of the height of the reduced material to the height of the valve body is 0.15:1 to 0.18:1, with the reduced material portion of the valve body accounting for 14% to 18% of the valve body.
[0019] Specifically, the recessed subtractive portion is provided with rivet holes for riveting information signs.
[0020] Compared with existing technologies, the advantages of this application are as follows: This application designs a reversing solenoid valve with a low-power electromagnet driving the valve core, which can be used under low pressure and low flow conditions. This reduces the cost of using the reversing solenoid valve; and during operation, due to the low power of the electromagnet, the coil consumes very little power and generates little heat, so the temperature of the reversing solenoid valve will not rise significantly, allowing it to be used in temperature-sensitive equipment. The reversing solenoid valve features a double-spring assembly on both sides, with the first return spring sleeved outside the second return spring. This double-spring assembly reduces the reversing impact of the valve core. This application also redesigns the oil passage position in the solenoid valve, placing the sixth oil passage, which connects the first and fifth oil passages, below the valve core through hole. This shortens the length of the flow path connecting the sixth oil passage and the T-port, reducing fluid pressure loss. The redesigned oil passage position also makes the flow path layout of the solenoid valve more compact. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a simplified structural diagram of the cryogenic solenoid directional valve in an embodiment of this application;
[0023] Figure 2 This is a simplified structural diagram of the bottom surface of the valve body in an embodiment of this application;
[0024] Figure 3 This is a simplified structural diagram of the side of the valve body in an embodiment of this application;
[0025] Figure 4 This is a simplified structural diagram of the flow channel inside the valve body in an embodiment of this application;
[0026] Figure 5 This is a simplified structural diagram of the valve core in an embodiment of this application;
[0027] Figure 6 This is a simplified structural diagram of the top surface of the valve body in an embodiment of this application. Detailed Implementation
[0028] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0029] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0030] It should be noted that the following description covers various aspects of embodiments within the scope of protection of this application. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.
[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0032] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.
[0033] This application provides a cryogenic solenoid directional valve 100, such as... Figure 1 As shown, it includes: valve body 10, valve core 20, low-power electromagnet 30, and double spring assembly 40.
[0034] like Figure 2As shown, a through hole 11 is provided inside the valve body 10, and oil ports A 121, B 122, P 123, T 124, and T 125 are provided on the bottom surface 12 of the valve body. Oil ports A 121 and B 122 are located directly below the through hole 11, oil port P 123 is located on one side of the projection of the through hole 11 onto the bottom surface 12 of the valve body, and oil ports T 124 and T 125 are located on the other side of the projection of the through hole 11 onto the bottom surface 12 of the valve body. The projection of the through hole 11 onto the bottom surface 12 of the valve body and the straight line formed by connecting oil ports A 121 and B 122 are on the same vertical plane. Oil outlets A121, B122, P123, T124, and T125 form an isosceles triangle with vertices P123, T124, and T125. Oil outlets P123, A121, and T124 form one leg of the isosceles triangle, while oil outlets P123, B122, and T125 form the other leg.
[0035] like Figure 3 As shown, the through hole 11 is parallel to the bottom surface 12 of the valve body. Figure 4 As shown, within the valve body 10, along the extension direction of the through hole 11, there are sequentially arranged a first oil passage 111, a second oil passage 112, a third oil passage 113, a fourth oil passage 114, and a fifth oil passage 115. Each of the second, third, and fourth oil passages has a port, which connects to oil port A 121, oil port B 122, and oil port P 123 respectively. A sixth oil passage 116 is provided between the through hole 11 and the bottom surface 12 of the valve body. The sixth oil passage 116 has four ports, with ports 1161 and 1162 located on either side. Port 1161 connects to the first oil passage 111, and port 1162 connects to the fifth oil passage 115. The sixth oil passage 116 connects to both the first and fifth oil passages. Ports 1163 and 1164 are provided on the surface of the sixth oil passage 116 facing the bottom surface 12 of the valve body. Port 1163 is connected to T-port 124, and port 1164 is connected to T-port 125.
[0036] like Figure 1 As shown, the valve core 20 is installed within the through hole 11, and the valve core 20 has at least two bosses 201 along the axial direction. A step 202 is provided between the two bosses 201, the height of which is lower than that of the two bosses 201. The step 202 is convex, forming a hydraulic buffer surface. The step 202 balances the resistance generated by the uneven distribution of hydraulic pressure in the valve core 20, reducing the thrust required by the valve core 20 during switching. The valve core 20 moves relative to the valve body 10, and by moving to different positions, it achieves the closure or connection of different oil passages within the valve body 20.
[0037] A low-power electromagnet 30 is disposed at at least one end of the valve body 10 and is coaxial with the valve core 20. The low-power electromagnet 30 consists of a solenoid assembly 301 and a coil assembly 302, with the coil assembly 302 mounted on the solenoid assembly 301. The low-power electromagnet 30 has a power of 5W. When the cryogenic solenoid directional valve 100 operates under low pressure and low flow conditions, the low-power electromagnet 30 drives the valve core 20 to move. The valve core 20 moves to different positions to complete the closing or opening of different oil passages, thus completing the switching operation of the cryogenic solenoid directional valve 100. The low-power electromagnet 30 does not require a relay for control in the electronic control section, resulting in low operating costs. Furthermore, due to its low power, the coil assembly 302 consumes very little power and generates little heat during operation. The temperature of the cryogenic solenoid directional valve 100 does not change significantly during operation, and the temperature rises slowly.
[0038] Two sets of double-spring assemblies 40 are symmetrically arranged on both sides of the valve core 20, with a gasket 50 between the double-spring assembly 40 and the valve core 20. Each double-spring assembly 40 includes a first return spring and a second return spring. The inner diameter of the first return spring is larger than the outer diameter of the second return spring, and the first return spring is sleeved on the outside of the second return spring. The first and second return springs, which are sleeved together, have opposite directions of rotation.
[0039] The cryogenic solenoid directional valve 100 is installed on equipment that is sensitive to temperature and has low flow and pressure. When the cryogenic solenoid directional valve 100 starts working, the low-power electromagnet 30 is energized, driving the valve core 20 to move within the through hole 11. When the low-power electromagnet 30 drives the valve core 20 to the side of the fifth oil passage 115, port P 123 connects to port A 121, and port B 122 connects to ports T 124 and T 125. When the low-power electromagnet 30 drives the valve core 20 to the side of the first oil passage 111, port P 123 connects to port B 122, and port A 121 connects to ports T 124 and T 125. After the low-power electromagnet 30 is de-energized, the compressed double spring assembly 40 generates a thrust, resetting the valve core 20.
[0040] In one embodiment, the ratio of the first reset spring to the second reset spring is 2:1.
[0041] In one embodiment, the ratio of the elastic coefficients of the first return spring to the second return spring is 20:3.
[0042] In one embodiment, such as Figure 2As shown, a step 202 is provided between the two bosses 201, including two inclined surfaces, namely inclined surface 2021 and inclined surface 2022, which form an included angle of 130°. This reduces the hydraulic force when the valve core moves to the left or right and the valve port is fully opened, which helps to reduce the resistance on the valve core and further reduces the required thrust of the electromagnet.
[0043] In one embodiment, a step 202 is provided between the two bosses 201, comprising two arc surfaces, one end of which intersects, and the two arc surfaces form a reversing buffer surface.
[0044] In one embodiment, T-port 124 and T-port 125 and P-port 123 on the valve body are respectively disposed on both sides of the projection of the through hole 11 onto the bottom surface 12 of the valve body, and the sixth oil passage 116 is disposed directly above T-port 124 and T-port 125.
[0045] In one embodiment, such as Figure 6 As shown, the valve body 10 above the through hole 11 is reduced in size. The ratio of the height of the reduced portion 13 to the height of the valve body 10 is 0.15:1 to 0.18:1. The valve body of the reduced portion 13 accounts for 14% to 18% of the valve body 10.
[0046] In one embodiment, the recessed subtractive portion 13 is provided with rivet holes for riveting information signs.
[0047] The above description is merely a specific 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.
Claims
1. A cryogenic solenoid directional valve, characterized in that, include: Valve body, valve core, low-power electromagnet, double spring assembly; A through hole is provided inside the valve body; The valve core is installed in the through hole and can move relative to the valve body to achieve the closure or connection of different oil passages in the valve body; Two sets of dual-spring assemblies are symmetrically arranged on both sides of the valve core. Each set of dual-spring assemblies includes a first reset spring and a second reset spring. The first reset spring is sleeved on the outside of the second reset spring. The two sets of dual-spring assemblies are used to reduce the reversing impact of the valve core. The low-power electromagnet is disposed at at least one end of the valve body and is used to drive the valve core to move relative to the valve body. The valve body has an A port, a B port, a P port, and two T ports on its bottom surface. A first oil passage, a second oil passage, a third oil passage, a fourth oil passage, and a fifth oil passage are sequentially arranged along the extension direction of the through hole. A sixth oil passage is arranged between the through hole and the bottom surface of the valve body, and the sixth oil passage connects the first oil passage and the fifth oil passage. The second oil passage is connected to the A port, the third oil passage is connected to the P port, the fourth oil passage is connected to the B port, and the sixth oil passage is connected to the two T ports.
2. The cryogenic solenoid directional valve according to claim 1, characterized in that, The first reset spring and the second reset spring have opposite directions of rotation, and the size ratio of the first reset spring to the second reset spring is 2:
1.
3. The cryogenic solenoid directional valve according to claim 1, characterized in that, The ratio of the elastic coefficients of the first reset spring to that of the second reset spring is 20:
3.
4. The cryogenic solenoid directional valve according to claim 1, characterized in that, The valve core is provided with a first boss, a step and a second boss in sequence along its axis; the first boss and the second boss are used to open and close the oil passages in the valve body; the height of the step is lower than that of the first boss and the second boss.
5. The cryogenic solenoid directional valve according to claim 4, characterized in that, The step includes two inclined surfaces, forming a reversing hydraulic buffer surface.
6. The cryogenic solenoid directional valve according to claim 5, characterized in that, The angle between the two inclined planes is 50° to 130°.
7. The cryogenic solenoid directional valve according to claim 4, characterized in that, The step includes two arc surfaces, one end of which intersects to form a reversing hydraulic buffer surface.
8. The cryogenic solenoid directional valve according to claim 1, characterized in that, The two T-ports and the P-port on the valve body are respectively located on both sides of the projection of the through hole on the bottom surface of the valve body, and the sixth oil passage is located directly above the two T-ports.
9. The cryogenic solenoid directional valve according to claim 1, characterized in that, The valve body above the through hole is reduced in material, and the ratio of the height of the reduced material to the height of the valve body is 0.15:1 to 0.18:
1. The valve body at the reduced material section accounts for 14% to 18% of the valve body.
10. The cryogenic solenoid directional valve according to claim 9, characterized in that, The recessed subtractive portion is provided with rivet holes for riveting information signs.