Oil way anti-overflow structure of reversing valve
By introducing a pressure relief mechanism into the reversing valve, the opening and closing of the pressure relief channel is controlled by using the solenoid coil and the pressure spring, the problem of hydraulic oil overflow is solved, and the effect of automatic pressure relief and oil spill prevention is achieved.
Patent Information
- Application Number
- CN202422534881.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-18
AI Technical Summary
The existing reversing valve has poor pressure relief capability, which causes hydraulic oil to overflow when the oil pressure is too high, affecting normal use.
The pressure relief mechanism is added to the reversing valve, and the movable iron core is controlled to push the valve core movement through the solenoid coil, and the hydraulic oil is pushed to open the pressure relief passage to discharge hydraulic oil. The pressure spring automatically closes the pressure relief passage to prevent oil spillage.
It realizes automatic pressure relief when the oil pressure is too high, prevents hydraulic oil from overflowing, and enhances the practicality and reliability of the reversing valve.
Smart Images
Figure CN223120303U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of endocrine body fluid inspection, in particular to an anti-overflow structure for the oil circuit of a reversing valve. Background Art
[0002] The reversing valve is an important component in the hydraulic system. Its main function is to control the flow direction of hydraulic oil, thereby changing the movement direction of the actuator (such as a hydraulic cylinder or a hydraulic motor).
[0003] The existing reversing valve has poor pressure relief ability. When the oil circuit pressure is too high, the hydraulic oil may penetrate into each oil circuit and the structural gaps of the reversing valve under the action of the oil pressure, resulting in the overflow of the hydraulic oil and affecting the normal use of the reversing valve.
[0004] Therefore, in view of the above problems, an anti-overflow structure for the oil circuit of a reversing valve can be designed. A pressure relief mechanism is added to the reversing valve, so that when the oil circuit pressure is too high, the reversing valve can use the oil pressure to open the pressure relief channel to discharge the hydraulic oil, avoiding oil overflow due to excessive oil pressure in the oil circuit. Summary of the Utility Model
[0005] In order to overcome the problem that most reversing valves have poor pressure relief ability. When the oil circuit pressure is too high, the hydraulic oil may penetrate into each oil circuit and the structural gaps of the reversing valve under the action of the oil pressure, resulting in the overflow of the hydraulic oil and affecting the normal use of the reversing valve.
[0006] The technical solution of the utility model is: an anti-overflow structure for the oil circuit of a reversing valve, including a valve body, a valve core, a sealing block, a return spring, a movable iron core, an electromagnetic coil, a pressure relief cylinder, a baffle and a pressure spring; a valve core is arranged inside the valve body, two groups of sealing blocks are arranged outside the valve core, the sealing blocks are in sealed sliding connection with the inner wall of the valve body, return springs are arranged at both ends of the valve core, a movable iron core is arranged on one side of the return spring, the movable iron core is in sliding connection with the valve body, an electromagnetic coil is arranged outside the movable iron core, the electromagnetic coil is fixedly connected with the valve body, a pressure relief cylinder is arranged above the valve body, the pressure relief cylinder is connected and communicated with the valve body, a baffle is arranged inside the pressure relief cylinder, the baffle is in sliding connection with the pressure relief cylinder, and a pressure spring is arranged above the baffle.
[0007] Preferably, by setting an electromagnetic coil channel to control the movement of the movable iron core to push the valve core to move in the valve body, thereby making the sealing block move to switch the oil circuit channel. The return spring makes the sealing block center to keep the oil circuit closed in the non-powered state. When the oil circuit pressure is too high, the oil pressure can push the baffle to move and compress the pressure spring to open the pressure relief channel, so that the hydraulic oil enters the pressure relief cylinder and is discharged. When the oil pressure is lower than the threshold value, the pressure spring pushes the baffle to close the pressure relief channel, realizing the function of automatic pressure relief, preventing the reversing valve from overflowing due to excessive oil pressure, and enhancing the practical value of the device.
[0008] Preferably, first limiting plates are arranged at both ends of the valve core. A connecting rod is arranged at the inner end of the movable iron core. A second limiting plate is arranged on one side of the connecting rod. The return spring is located between the first limiting plate and the second limiting plate.
[0009] Preferably, first partition plates are arranged on both inner sides of the valve body. The connecting rod penetrates through the first partition plates and is slidably connected with the first partition plates. The first partition plates divide the inner space of the valve body into a power chamber, and the length of the power chamber is greater than the length of the movable iron core.
[0010] Preferably, second partition plates are arranged on both inner sides of the valve body. The valve core penetrates through the second partition plates and is slidably connected with the second partition plates. The second partition plates and the first partition plates divide an activity chamber, and the first limiting plate, the return spring and the second limiting plate are located in the activity chamber.
[0011] Preferably, two groups of sealing blocks divide an oil passage chamber. A pressure relief port is arranged above the oil passage chamber. An oil inlet is arranged at the bottom of the oil passage chamber. Oil outlets are arranged on both sides of the oil inlet. The distance between the two groups of oil inlets is less than the length of the oil passage chamber.
[0012] Preferably, a baffle divides a pressure relief cylinder into a pressure relief chamber. An oil drain port is arranged at the outer bottom of the pressure relief cylinder. The oil drain port is connected and communicated with the pressure relief chamber.
[0013] Preferably, an adjusting plate is arranged above the pressure spring. The adjusting plate is slidably connected with the pressure relief cylinder. A threaded rod is arranged above the adjusting plate. The threaded rod is threadedly connected with the pressure relief cylinder. A stress block is arranged above the threaded rod.
[0014] The beneficial effects of the present utility model are as follows:
[0015] 1. The device is provided with a pressure relief mechanism. When the oil pressure in the oil passage is too high, the oil pressure can push the baffle to move and compress the pressure spring to open the pressure relief channel, so that the hydraulic oil enters the pressure relief cylinder and is discharged. When the oil pressure is lower than the threshold value, the pressure spring pushes the baffle to close the pressure relief channel, realizing the function of automatic pressure relief, preventing the overflow of oil from the reversing valve caused by excessive oil pressure, and enhancing the practical value of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Shown is a three-dimensional structural schematic diagram of the oil passage anti-overflow structure of the reversing valve of the present utility model;
[0017] Figure 2 Shown is a three-dimensional structural schematic diagram of the valve core of the oil passage anti-overflow structure of the reversing valve of the present utility model;
[0018] Figure 3 Shown is a three-dimensional structural schematic diagram of the valve body of the oil passage anti-overflow structure of the reversing valve of the present utility model;
[0019] Figure 4The figure shows a three-dimensional schematic structure of a pressure relief cylinder of an oil circuit anti-overflow structure of a reversing valve according to the present utility model.
[0020] Explanation of reference numerals: 1, valve body; 101, oil inlet; 102, oil outlet; 103, pressure relief port; 104, first partition plate; 105, oil circuit chamber; 106, movable chamber; 107, power chamber; 108, second partition plate; 2, valve core; 3, sealing block; 4, return spring; 401, first limit plate; 402, second limit plate; 403, connecting rod; 5, movable iron core; 6, electromagnetic coil; 7, pressure relief cylinder; 701, oil drain port; 702, pressure relief chamber; 8, baffle; 9, pressure spring; 901, adjusting plate; 902, threaded rod; 903, force-bearing block. Specific embodiments
[0021] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0022] Please refer to Figures 1-4 , the present utility model provides an embodiment: an oil circuit anti-overflow structure of a reversing valve, including a valve body 1, a valve core 2, a sealing block 3, a return spring 4, a movable iron core 5, an electromagnetic coil 6, a pressure relief cylinder 7, a baffle 8 and a pressure spring 9; a valve core 2 is arranged inside the valve body 1, two groups of sealing blocks 3 are arranged outside the valve core 2, the sealing blocks 3 are in sealed sliding connection with the inner wall of the valve body 1, return springs 4 are arranged at both ends of the valve core 2, a movable iron core 5 is arranged on one side of the return spring 4, the movable iron core 5 is in sliding connection with the valve body 1, an electromagnetic coil 6 is arranged outside the movable iron core 5, the electromagnetic coil 6 is fixedly connected with the valve body 1, a pressure relief cylinder 7 is arranged above the valve body 1, the pressure relief cylinder 7 is connected and communicated with the valve body 1, a baffle 8 is arranged inside the pressure relief cylinder 7, the baffle 8 is in sliding connection with the pressure relief cylinder 7, and a pressure spring 9 is arranged above the baffle 8.
[0023] Please refer to Figure 2 , in this embodiment, first limit plates 401 are arranged at both ends of the valve core 2, a connecting rod 403 is arranged at the inner end of the movable iron core 5, a second limit plate 402 is arranged on one side of the connecting rod 403, and the return spring 4 is located between the first limit plate 401 and the second limit plate 402; the first limit plate 401 and the second limit plate 402 provide a force application point for the return spring 4, and at the same time, they can cooperate with the internal structure of the valve body 1 to limit the movement of the valve core 2, and the connecting rod 403 is used to connect the second limit plate 402 and the movable iron core 5.
[0024] Please refer to Figure 3, in this embodiment, first partition plates 104 are arranged on both inner sides of the valve body 1. The connecting rod 403 penetrates through the first partition plates 104 and is slidably connected to the first partition plates 104. The first partition plates 104 divide the inner space of the valve body 1 into a power chamber 107. The length of the power chamber 107 is greater than the length of the movable iron core 5. Second partition plates 108 are arranged on both inner sides of the valve body 1. The valve core 2 penetrates through the second partition plates 108 and is slidably connected to the second partition plates 108. The second partition plates 108 and the first partition plates 104 divide an activity chamber 106. The first limit plate 401, the return spring 4, and the second limit plate 402 are located in the activity chamber 106. Two groups of sealing blocks 3 divide an oil circuit chamber 105. A pressure relief port 103 is arranged above the oil circuit chamber 105. An oil inlet 101 is arranged at the bottom of the oil circuit chamber 105. Oil outlets 102 are arranged on both sides of the oil inlet 101. The distance between the two groups of oil inlets 101 is less than the length of the oil circuit chamber 105; the activity chamber 106 provides an activity space for the first limit plate 401 and the second limit plate 402 and provides a space for the deformation of the return spring 4. The power chamber 107 provides a space for the movement of the movable iron core 5. The first partition plates 104 can limit the stroke of the movable iron core 5. The second limit plate 402 can limit the movement stroke of the valve core 2. The oil inlet 101 serves as an oil inlet channel, the oil outlets 102 serve as oil outlet channels, and the pressure relief port 103 serves as a pressure relief channel when the oil pressure is too high.
[0025] Please refer to Figure 4 , in this embodiment, the baffle 8 divides the pressure relief cylinder 7 into a pressure relief chamber 702. An oil drain port 701 is arranged at the outer bottom of the pressure relief cylinder 7. The oil drain port 701 is connected and communicated with the pressure relief chamber 702. An adjusting plate 901 is arranged above the pressure spring 9. The adjusting plate 901 is slidably connected to the pressure relief cylinder 7. A threaded rod 902 is arranged above the adjusting plate 901. The threaded rod 902 is threadedly connected to the pressure relief cylinder 7. A force receiving block 903 is arranged above the threaded rod 902; the pressure relief chamber 702 serves as a channel for the hydraulic oil discharged from the pressure relief to flow out of the oil drain port 701. The force receiving block 903 facilitates the operator to use a tool to rotate the threaded rod 902. By utilizing the threaded connection between the threaded rod 902 and the pressure relief cylinder 7, the threaded rod 902 moves up and down to drive the adjusting plate 901 to move, adjusting the pre-pressure of the pressure spring 9, thereby adjusting the minimum oil pressure at which the pressure relief starts.
[0026] When the oil pressure in the directional control valve is too high, the hydraulic oil in the oil circuit chamber 105 pushes the baffle 8 upward, so that the hydraulic oil can enter the pressure relief chamber 702 from the pressure relief port 103 and then flow out of the oil drain port 701 to complete the pressure relief. When the oil pressure is lower than the set threshold value, the hydraulic oil can no longer push the baffle 8, and the pressure spring 9 releases energy to push the baffle 8 downward to close the pressure relief port 103;
[0027] When adjusting the minimum pressure of pressure relief, use a tool to rotate the force-bearing block 903 to drive the threaded rod 902 to rotate. Utilize the threaded connection between the threaded rod 902 and the pressure relief cylinder 7 to make the threaded rod 902 move up and down to drive the adjusting plate 901 to move, adjust the pre-pressure of the pressure spring 9, and thus adjust the minimum oil pressure at the start of pressure relief.
[0028] Through the above steps, by setting the electromagnetic coil 6 channels to control the movement of the movable iron core 5 to push the valve core 2 to move in the valve body 1, the sealing block 3 is made to move to switch the oil circuit channel. The return spring 4 makes the device keep the sealing block 3 centered to close the oil circuit in the non-powered state. When the oil circuit pressure is too high, the oil pressure can push the baffle 8 to move and compress the pressure spring 9 to open the pressure relief channel, allowing the hydraulic oil to enter the pressure relief cylinder 7 and be discharged. When the oil pressure is lower than the threshold value, the pressure spring 9 pushes the baffle 8 to close the pressure relief channel, realizing the function of automatic pressure relief, preventing the oil spillage of the reversing valve caused by excessive oil pressure, and enhancing the practical value of the device.
[0029] The above has described in detail the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge scope of those skilled in the art.
Claims
1. Oil overflow prevention structure for the oil circuit of a directional control valve, including a valve body (1); characterized in that: It also includes a valve core (2), a sealing block (3), a return spring (4), a movable iron core (5), an electromagnetic coil (6), a pressure relief cylinder (7), a baffle (8) and a pressure spring (9); a valve core (2) is arranged inside the valve body (1), two groups of sealing blocks (3) are arranged outside the valve core (2), the sealing blocks (3) are in sealed sliding connection with the inner wall of the valve body (1), return springs (4) are arranged at both ends of the valve core (2), a movable iron core (5) is arranged on one side of the return spring (4), the movable iron core (5) is in sliding connection with the valve body (1), an electromagnetic coil (6) is arranged outside the movable iron core (5), the electromagnetic coil (6) is fixedly connected with the valve body (1), a pressure relief cylinder (7) is arranged above the valve body (1), the pressure relief cylinder (7) is connected and communicated with the valve body (1), a baffle (8) is arranged inside the pressure relief cylinder (7), the baffle (8) is in sliding connection with the pressure relief cylinder (7), and a pressure spring (9) is arranged above the baffle (8).
2. The anti-overflow structure of the oil circuit of the reversing valve according to claim 1, wherein: First limiting plates (401) are arranged at both ends of the valve core (2), a connecting rod (403) is arranged at the inward end of the movable iron core (5), a second limiting plate (402) is arranged on one side of the connecting rod (403), and the return spring (4) is located between the first limiting plate (401) and the second limiting plate (402).
3. The anti-overflow structure of the oil circuit of the reversing valve according to claim 1, characterized in that: First partition plates (104) are arranged on both sides inside the valve body (1), the connecting rod (403) penetrates through the first partition plates (104) and is in sliding connection with the first partition plates (104), the first partition plates (104) divide the inner space of the valve body (1) into a power chamber (107), and the length of the power chamber (107) is greater than the length of the movable iron core (5).
4. The anti-overflow structure of the oil path of the reversing valve according to claim 3, characterized in that: Second partition plates (108) are arranged on both sides inside the valve body (1), the valve core (2) penetrates through the second partition plates (108) and is in sliding connection with the second partition plates (108), the second partition plates (108) and the first partition plates (104) divide an activity chamber (106), and the first limiting plate (401), the return spring (4) and the second limiting plate (402) are located inside the activity chamber (106).
5. The anti-overflow structure of the oil circuit of the reversing valve according to claim 1, wherein: The two groups of sealing blocks (3) divide an oil passage chamber (105), a pressure relief port (103) is arranged above the oil passage chamber (105), an oil inlet (101) is arranged at the bottom of the oil passage chamber (105), oil outlets (102) are arranged on both sides of the oil inlet (101), and the distance between the two groups of oil inlets (101) is less than the length of the oil passage chamber (105).
6. The anti-overflow structure of the oil circuit of the reversing valve according to claim 1, characterized in that: The baffle (8) divides the pressure relief cylinder (7) into a pressure relief chamber (702), an oil drain port (701) is arranged at the outer bottom of the pressure relief cylinder (7), and the oil drain port (701) is connected and communicated with the pressure relief chamber (702).
7. The anti-overflow structure of the oil circuit of the reversing valve according to claim 1, characterized in that: An adjusting plate (901) is arranged above the pressure spring (9), the adjusting plate (901) is in sliding connection with the pressure relief cylinder (7), a threaded rod (902) is arranged above the adjusting plate (901), the threaded rod (902) is in threaded connection with the pressure relief cylinder (7), and a force receiving block (903) is arranged above the threaded rod (902).