A sealed three-way solenoid valve

Abstract

The present application relates to the technical field of electromagnetic valves, and in particular to a sealed three-way electromagnetic valve, which comprises an interconnected mounting shell and a valve sleeve, a rotating electromagnet is mounted on the mounting shell, a toggle assembly is arranged on the output shaft of the rotating electromagnet, and the toggle assembly is connected to the mounting shell through a first spring; a straight groove is arranged inside the valve sleeve, a retractable valve core assembly is slidably embedded in the straight groove, and the valve core assembly is connected to the toggle assembly; one end of the valve core assembly and the inner wall of the valve sleeve together form a high-pressure chamber, and the other end of the valve core assembly and the inner wall of the valve sleeve together form a sensitive chamber, and the side of the valve core assembly is provided with a high-pressure groove and a low-pressure groove that can be rotatably connected to the straight groove; the side of the valve sleeve is provided with a first valve port, a second valve port and a third valve port arranged in sequence along the sliding direction of the valve core assembly, the first valve port, the second valve port and the third valve port are all connected to the straight groove, and the inside of the valve sleeve is provided with a first connecting groove and a second connecting groove. The present application can improve the problem that the electromagnetic valve is prone to abnormal reversing.

Description

Technical Field

[0001] The present application relates to the technical field of solenoid valves, and in particular to a sealed three-way solenoid valve. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic components for controlling fluid automation and belong to actuators, not limited to hydraulic and pneumatic. They are used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed.

[0003] At present, for a two-position three-way solenoid valve, a push-pull electromagnet is usually used to drive the valve core to move linearly, and the position of the valve core is changed to change the flow direction of the fluid in the solenoid valve, so that the fluid can flow out from different valve ports.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: the magnetic force that the electromagnet can generate is limited, and the reliability is low when the valve core is driven by the magnetic force of the electromagnet to overcome the friction during linear motion, and abnormal fluid reversing failures are prone to occur, so improvement is needed. Summary of the invention

[0005] In order to improve the problem that the solenoid valve is prone to abnormal switching, the present application provides a sealed three-way solenoid valve.

[0006] The present application provides a sealed three-way solenoid valve, which adopts the following technical solution: a sealed three-way solenoid valve, comprising a mounting shell and a valve sleeve connected to each other, a rotating electromagnet mounted on the mounting shell, a toggle assembly provided on the output shaft of the rotating electromagnet, and the toggle assembly connected to the mounting shell through a first spring;

[0007] A straight groove is provided inside the valve sleeve, and a retractable valve core assembly is slidably embedded in the straight groove. The sliding direction of the valve core assembly is the same as the axial direction of the rotating electromagnet. The valve core assembly is connected to the toggle assembly. The rotating electromagnet can drive the valve core assembly to rotate in the straight groove through the toggle assembly.

[0008] One end of the valve core assembly and the inner wall of the valve sleeve together form a high-pressure chamber, and the other end of the valve core assembly and the inner wall of the valve sleeve together form a sensitive chamber. The side of the valve core assembly is provided with a high-pressure groove and a low-pressure groove which are rotatably connected to the straight groove;

[0009] The side of the valve sleeve is provided with a first valve port, a second valve port and a third valve port which are arranged in sequence along the sliding direction of the valve core assembly, the first valve port, the second valve port and the third valve port are all connected to the straight groove, and the interior of the valve sleeve is provided with a first connecting groove and a second connecting groove;

[0010] When the first spring is in a natural state, the low-pressure groove will be connected to the first valve port through the straight groove and the first connecting groove. At this time, the sensitive cavity is at low pressure, the valve core assembly will extend and extend into the sensitive cavity, and the first valve port will be connected to the second valve port through the gap between the valve core assembly and the wall of the straight groove;

[0011] When the rotating electromagnet drives the valve core assembly to rotate in the straight groove through the toggle assembly, so that the high-pressure groove is connected to the third valve port through the straight groove and the second connecting groove, the sensitive cavity is under high pressure, the valve core assembly will shrink and sink into the high-pressure cavity, and the second valve port will be connected to the third valve port through the gap between the valve core assembly and the wall of the straight groove.

[0012] Optionally, the shifting assembly includes a connecting plate for mounting a rotating electromagnet and a shift fork arranged on an output shaft of the rotating electromagnet. An active shifting rod for shifting by the shift fork is rotatably connected to the connecting plate. A driven shifting rod is provided on the valve core assembly. The active shifting rod can drive the valve core assembly to rotate through the driven shifting rod. The active shifting rod and the driven shifting rod cooperate with each other to increase the transmission ratio.

[0013] Optionally, the valve sleeve includes a valve sleeve body installed on the mounting shell, a straight groove is arranged inside the valve sleeve body, a blocking cap is installed at one end of the valve sleeve body away from the mounting shell, and the sensitive cavity is located inside the blocking cap.

[0014] Optionally, a first sealing ring for the valve core assembly to slide through is installed on the inner side of the blocking cap, and the first sealing ring is located between the sensitive cavity and the third valve port.

[0015] Optionally, the mounting shell includes a box cover, the rotating electromagnet is mounted on the inner side of the box cover, one end of the box cover is open and is equipped with a head cover, and both the box cover and the head cover are provided with bolt holes for bolts to pass through.

[0016] Optionally, a penetration groove is provided on the head end cover, and a second sealing ring for the valve core assembly to rotate and penetrate is installed in the penetration groove.

[0017] Optionally, the valve core assembly includes a valve core drive shaft connected to the toggle assembly, a limit sleeve is installed on the valve core drive shaft and is rotatably inserted into the straight groove, a spring seat is slidably embedded in the limit sleeve, the spring seat is connected to the valve core body through a second spring, the valve core body is rotatably inserted into the straight groove, and a support block is installed in the limit sleeve for the spring seat to slide against; when the spring seat contacts the support block, the high-pressure groove will be connected to the straight groove.

[0018] Optionally, the valve sleeve outer shell is provided with a third sealing ring, and the third sealing ring is located between the second valve port and the third valve port.

[0019] Optionally, a fourth sealing ring is disposed on the valve sleeve outer shell, and the fourth sealing ring is located between the first valve port and the second valve port.

[0020] Optionally, the valve sleeve outer shell is provided with a fifth sealing ring, and the fifth sealing ring is located between the first valve port and the mounting shell.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] 1. When the first spring is in the natural state, the low-pressure groove will be connected to the first valve port through the straight groove and the first connecting groove. At this time, the sensitive cavity is at low pressure. In order to maintain pressure balance, the valve core assembly will extend and extend into the sensitive cavity. At this time, the first valve port will be connected to the second valve port through the gap between the valve core assembly and the wall of the straight groove;

[0023] 2. When the rotating electromagnet drives the valve core assembly to rotate in the straight groove through the toggle assembly, so that the high-pressure groove is connected to the third valve port through the straight groove and the second connecting groove, the sensitive cavity is high pressure. In order to maintain pressure balance, the valve core assembly will shrink and sink into the high-pressure cavity, and the second valve port will be connected to the third valve port through the gap between the valve core assembly and the straight groove wall;

[0024] 3. The present application transforms the linear motion of the valve core driven by a push-pull electromagnet in the background technology into a rotating electromagnet driving the toggle assembly to rotate. The toggle assembly will drive the valve core assembly to rotate synchronously and cause the valve core assembly to extend and retract to complete the reversing of the solenoid valve. The present application transforms the linear sliding friction of the valve core assembly into the rotational friction of the valve core assembly, and the linear motion of the valve core assembly is completed by the pressure difference between the high-pressure chamber and the sensitive chamber, thereby improving the reliability of the rotary electromagnet indirectly driving the linear motion of the valve core assembly, thereby improving the problem of abnormal reversing of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the embodiment of the present application;

[0026] Figure 2 is a schematic cross-sectional structural diagram of the valve sleeve and the second connecting groove in an embodiment of the present application;

[0027] Figure 3 is a schematic cross-sectional structural diagram of the valve sleeve and the first connecting groove in an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of the structure of the high-pressure tank, the low-pressure tank and the straight tank in the embodiment of the present application;

[0029] Figure 5 It is a schematic diagram of the structure of the rotating electromagnet and the toggle assembly in the embodiment of the present application.

[0030] Reference numerals: 1, mounting shell; 11, box cover; 12, head end cover; 13, bolt hole; 14, penetration groove; 141, second sealing ring; 2, valve sleeve; 21, straight groove; 22, first valve port; 23, second valve port; 24, third valve port; 25, first connecting groove; 26, second connecting groove; 27, valve sleeve body; 271, third sealing ring; 272, fourth sealing ring; 273, fifth sealing ring; 28, plugging cap; 28 1. First sealing ring; 3. Rotating electromagnet; 4. Toggle assembly; 41. First spring; 42. Connecting plate; 43. Fork; 44. Active lever; 441. Rotating shaft; 45. Driven lever; 5. Valve core assembly; 51. High-pressure groove; 52. Low-pressure groove; 53. Valve core transmission shaft; 54. Limit sleeve; 55. Spring seat; 56. Second spring; 57. Valve core body; 58. Support block; 6. High-pressure chamber; 7. Sensitive chamber. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1-5 This application is described in further detail.

[0032] The present application discloses a sealed three-way solenoid valve. Figure 1 As shown, a sealed three-way solenoid valve includes a mounting shell 1 and a valve sleeve 2 connected to each other. The mounting shell 1 includes a box cover 11. One end of the box cover 11 is open and is equipped with a head cover 12. Bolt holes 13 for bolts to pass through are provided on the box cover 11 and the head cover 12, so that workers can install the mounting shell 1 at a designated position.

[0033] like Figure 1 and Figure 5 As shown, a rotating electromagnet 3 is installed on the inner side of the box cover 11, and a toggle assembly 4 is provided on the output shaft of the rotating electromagnet 3, and the toggle assembly 4 is connected to the mounting shell 1 through a first spring 41; a straight groove 21 is provided inside the valve sleeve 2, and a retractable valve core assembly 5 is slidably embedded in the straight groove 21, and the sliding direction of the valve core assembly 5 is the same as the axial direction of the rotating electromagnet 3, and the valve core assembly 5 is connected to the toggle assembly 4.

[0034] like Figures 2 to 4 As shown, one end of the valve core assembly 5 and the inner wall of the valve sleeve 2 together form a high-pressure chamber 6, and the other end of the valve core assembly 5 and the inner wall of the valve sleeve 2 together form a sensitive chamber 7. The side of the valve core assembly 5 is provided with a high-pressure groove 51 and a low-pressure groove 52 which can be rotatably connected to the straight groove 21.

[0035] The side of the valve sleeve 2 is provided with a first valve port 22, a second valve port 23 and a third valve port 24 arranged in sequence along the sliding direction of the valve core assembly 5. The first valve port 22, the second valve port 23 and the third valve port 24 are all connected to the straight groove 21, and the interior of the valve sleeve 2 is provided with a first connecting groove 25 and a second connecting groove 26.

[0036] When the first spring 41 is in a natural state, the low-pressure groove 52 will be connected to the first valve port 22 through the straight groove 21 and the first connecting groove 25. At this time, the sensitive chamber 7 is at low pressure. In order to maintain pressure balance, the valve core assembly 5 will extend and extend into the sensitive chamber 7. At this time, the first valve port 22 will be connected to the second valve port 23 through the gap between the valve core assembly 5 and the groove wall of the straight groove 21.

[0037] When the rotating electromagnet 3 drives the valve core assembly 5 to rotate in the straight groove 21 through the toggle assembly 4, so that the high-pressure groove 51 is connected to the third valve port 24 through the straight groove 21 and the second connecting groove 26, the sensitive chamber 7 is at high pressure. In order to maintain pressure balance, the valve core assembly 5 will shrink and sink into the high-pressure chamber 6, and the second valve port 23 will be connected to the third valve port 24 through the gap between the valve core assembly 5 and the groove wall of the straight groove 21.

[0038] Therefore, the present application transforms the linear motion of the valve core driven by the push-pull electromagnet in the background technology into the rotating electromagnet 3 driving the toggle assembly 4 to rotate. The toggle assembly 4 will drive the valve core assembly 5 to rotate synchronously and cause the valve core assembly 5 to extend and retract to complete the reversing of the solenoid valve. The present application transforms the linear sliding friction of the valve core assembly 5 into the rotational friction of the valve core assembly 5, and the linear motion of the valve core assembly 5 is completed by the pressure difference between the high-pressure chamber 6 and the sensitive chamber 7, thereby improving the reliability of the rotating electromagnet 3 indirectly driving the linear motion of the valve core assembly 5, thereby improving the problem of abnormal reversing of the solenoid valve.

[0039] like Figure 2 and Figure 5 As shown, the shifting assembly 4 includes a connecting plate 42 for mounting the rotating electromagnet 3 and a shift fork 43 mounted on the output shaft of the rotating electromagnet 3. An active shifting rod 44 for shifting by the shift fork 43 is rotatably connected to the connecting plate 42 via a rotary shaft 441, and a driven shifting rod 45 is provided on the valve core assembly 5.

[0040] When the rotating electromagnet 3 drives the active lever 44 to rotate, the active lever 44 will drive the valve core assembly 5 to rotate through the driven lever 45. The active lever 44 and the driven lever 45 cooperate with each other to increase the transmission ratio, thereby increasing the rotational torque of the rotating electromagnet 3 to facilitate the movement of the valve core assembly 5 in the straight groove 21.

[0041] like Figure 2 As shown, the valve sleeve 2 includes a valve sleeve 2 body mounted on the head end cover 12, a straight groove 21 is provided inside the valve sleeve 2 body, and a plugging cap 28 is installed at one end of the valve sleeve 2 body away from the mounting shell 1, which facilitates the disassembly and assembly of the valve sleeve 2.

[0042] The spool assembly 5 includes a spool drive shaft 53 connected to the driven lever 45. A limit sleeve 54 is mounted on the spool drive shaft 53 and rotatably passes through the straight groove 21. A spring seat 55 is slidably embedded in the limit sleeve 54. The spring seat 55 is connected to a spool body 57 by a second spring 56. The spool body 57 rotatably passes through the straight groove 21. A support block 58 for the spring seat 55 to slide against is installed in the limit sleeve 54.

[0043] When the spool body 57 extends into the sensitive chamber 7 and abuts against the plug cap 28, the low-pressure groove 52 will communicate with the straight groove 21, and the spool body 57 will be blocked and limited. At this time, the first valve port 22 will communicate with the second valve port 23 through the gap between the spool assembly 5 and the groove wall of the straight groove 21; when the spool body 57 sinks into the high-pressure chamber 6, the spring seat 55 will abut against the support block 58, the high-pressure groove 51 will communicate with the straight groove 21, and the spring seat 55 will be blocked and limited. At this time, the second valve port 23 will communicate with the third valve port 24 through the gap between the spool assembly 5 and the groove wall of the straight groove 21.

[0044] As Figure 1 shown, a first sealing ring 281 for the spool body 57 to slide through is installed on the inner side of the plug cap 28. The first sealing ring 281 is located between the sensitive chamber 7 and the third valve port 24. The first sealing ring 281 separates the sensitive chamber 7 from the valve port to prevent oil leakage.

[0045] A through groove 14 is provided on the head end cover 12. A second sealing ring 141 for the spool drive shaft 53 to rotate through is installed in the through groove 14. The second sealing ring 141 separates the first valve port 22 from the box cover 11 to prevent oil leakage.

[0046] A third sealing ring 271 is sleeved on the outer body of the valve sleeve 2. The third sealing ring 271 is located between the second valve port 23 and the third valve port 24. The third sealing ring 271 separates the second valve port 23 from the third valve port 24 to prevent oil leakage.

[0047] A fourth sealing ring 272 is sleeved on the outer body of the valve sleeve 2. The fourth sealing ring 272 is located between the first valve port 22 and the second valve port 23. The fourth sealing ring 272 separates the first valve port 22 from the second valve port 23 to prevent oil leakage.

[0048] A fifth sealing ring 273 is sleeved on the outer body of the valve sleeve 2. The fifth sealing ring 273 is located between the first valve port 22 and the mounting shell 1. The fifth sealing ring 273 separates the first valve port 22 from the mounting shell 1 to prevent oil leakage.

[0049] The implementation principle of a sealed three-way solenoid valve in an embodiment of the present application is as follows: when the first spring 41 is in a natural state, the low-pressure groove 52 will be connected to the first valve port 22 through the straight groove 21 and the first connecting groove 25. At this time, the sensitive chamber 7 is at low pressure. In order to maintain pressure balance, the valve core body 57 will gradually sink into the sensitive chamber 7 until it hits the inner bottom wall of the blocking cap 28. At this time, the first valve port 22 will be connected to the second valve port 23 through the gap between the valve core assembly 5 and the groove wall of the straight groove 21.

[0050] When the rotating electromagnet 3 drives the driven lever 45 to rotate through the active lever 44, the driven lever 45 will drive the valve core body 57 to rotate in the straight groove 21 through the valve core transmission shaft 53, so that the high-pressure groove 51 is connected to the third valve port 24 through the straight groove 21 and the second connecting groove 26. When the sensitive chamber 7 is high pressure, in order to maintain pressure balance, the valve core body 57 will rise and sink into the high-pressure chamber 6 until the spring seat 55 contacts the support block 58. At this time, the second valve port 23 will be connected to the third valve port 24 through the gap between the valve core assembly 5 and the groove wall of the straight groove 21.

[0051] To sum up, the rotating electromagnet 3 in the present application drives the valve core assembly 5 to rotate slightly by the toggle assembly 4, so that the valve core assembly 5 can be reversed due to the pressure difference between the high-pressure chamber 6 and the sensitive chamber 7, thereby improving the reliability of the rotating electromagnet 3 indirectly driving the valve core assembly 5 to move in a straight line, thereby improving the problem of abnormal switching of the solenoid valve.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sealed three-way solenoid valve, characterized in that: The invention comprises a mounting shell (1) and a valve sleeve (2) which are connected to each other, a rotating electromagnet (3) being mounted on the mounting shell (1), a toggle assembly (4) being arranged on the output shaft of the rotating electromagnet (3), and the toggle assembly (4) being connected to the mounting shell (1) via a first spring (41); A straight groove (21) is provided inside the valve sleeve (2), a retractable valve core assembly (5) is slidably embedded in the straight groove (21), the sliding direction of the valve core assembly (5) is the same as the axial direction of the rotating electromagnet (3), the valve core assembly (5) is connected to the toggle assembly (4), and the rotating electromagnet (3) can drive the valve core assembly (5) to rotate in the straight groove (21) through the toggle assembly (4); One end of the valve core assembly (5) and the inner wall of the valve sleeve (2) together form a high-pressure chamber (6), and the other end of the valve core assembly (5) and the inner wall of the valve sleeve (2) together form a sensitive chamber (7). The side of the valve core assembly (5) is provided with a high-pressure groove (51) and a low-pressure groove (52) which are rotatably connected to the straight groove (21); A first valve port (22), a second valve port (23) and a third valve port (24) are arranged in sequence along the sliding direction of the valve core assembly (5) on the side of the valve sleeve (2); the first valve port (22), the second valve port (23) and the third valve port (24) are all connected to the straight groove (21); and a first connecting groove (25) and a second connecting groove (26) are provided inside the valve sleeve (2); When the first spring (41) is in a natural state, the low-pressure groove (52) will be connected to the first valve port (22) through the straight groove (21) and the first connecting groove (25). At this time, the sensitive chamber (7) is at a low pressure, the valve core assembly (5) will extend and extend into the sensitive chamber (7), and the first valve port (22) will be connected to the second valve port (23) through the gap between the valve core assembly (5) and the groove wall of the straight groove (21); When the rotating electromagnet (3) drives the valve core assembly (5) to rotate in the straight groove (21) through the toggle assembly (4), so that the high-pressure groove (51) is connected to the third valve port (24) through the straight groove (21) and the second connecting groove (26), the sensitive chamber (7) is at high pressure, the valve core assembly (5) will shrink and sink into the high-pressure chamber (6), and the second valve port (23) will be connected to the third valve port (24) through the gap between the valve core assembly (5) and the groove wall of the straight groove (21).

2. The sealed three-way solenoid valve according to claim 1, characterized in that: The shifting assembly (4) comprises a connecting plate (42) for mounting the rotating electromagnet (3) and a shift fork (43) arranged on the output shaft of the rotating electromagnet (3); an active shifting rod (44) for shifting by the shift fork (43) is rotatably connected to the connecting plate (42); a driven shifting rod (45) is arranged on the valve core assembly (5); the active shifting rod (44) can drive the valve core assembly (5) to rotate through the driven shifting rod (45); the active shifting rod (44) and the driven shifting rod (45) cooperate with each other to increase the transmission ratio.

3. A sealed three-way solenoid valve according to claim 1, wherein: The valve sleeve (2) comprises a valve sleeve (2) body mounted on a mounting shell (1), a straight groove (21) being arranged inside the valve sleeve (2) body, a plugging cap (28) being arranged at one end of the valve sleeve (2) body away from the mounting shell (1), and the sensitive cavity (7) being located inside the plugging cap (28).

4. A sealed three-way solenoid valve according to claim 3, characterized in that: A first sealing ring (281) for the valve core assembly (5) to slide through is installed on the inner side of the blocking cap (28), and the first sealing ring (281) is located between the sensitive cavity (7) and the third valve port (24).

5. A sealed three-way solenoid valve according to claim 1, characterized in that: The mounting shell (1) comprises a box cover (11), a rotating electromagnet (3) is mounted on the inner side of the box cover (11), one end of the box cover (11) is open and is mounted with a head cover (12), and bolt holes (13) for bolts to pass through are provided on the box cover (11) and the head cover (12).

6. The sealed three-way solenoid valve according to claim 5, characterized in that: The head end cover (12) is provided with a penetration groove (14), and a second sealing ring (141) for the valve core assembly (5) to rotatably penetrate is installed in the penetration groove (14).

7. A sealed three-way solenoid valve according to claim 1, characterized in that: The valve core assembly (5) comprises a valve core transmission shaft (53) connected to the toggle assembly (4); a limit sleeve (54) rotatably inserted into the straight groove (21) is installed on the valve core transmission shaft (53); a spring seat (55) is slidably embedded in the limit sleeve (54); the spring seat (55) is connected to a valve core body (57) via a second spring (56); the valve core body (57) is rotatably inserted into the straight groove (21); a support block (58) for the spring seat (55) to slidably contact is installed in the limit sleeve (54); when the spring seat (55) contacts the support block (58), the high-pressure groove (51) will be connected to the straight groove (21).

8. A sealed three-way solenoid valve according to claim 1, wherein: The outer shell of the valve sleeve (2) is provided with a third sealing ring (271), and the third sealing ring (271) is located between the second valve port (23) and the third valve port (24).

9. A sealed three-way solenoid valve according to claim 1, characterized in that: The outer shell of the valve sleeve (2) is provided with a fourth sealing ring (272), and the fourth sealing ring (272) is located between the first valve port (22) and the second valve port (23).

10. A sealed three-way solenoid valve according to claim 1, characterized in that: The outer shell of the valve sleeve (2) is provided with a fifth sealing ring (273), and the fifth sealing ring (273) is located between the first valve port (22) and the mounting shell (1).

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