Two-position three-way electromagnetic valve

Abstract

The utility model relates to a two-position three-way electromagnetic valve which comprises a valve body, a valve block, a valve element, an insertion sleeve, a first spring and a push rod, a first through hole and a first spring cavity are formed in the valve block, and a second through hole and a second spring cavity which are aligned with the first through hole are formed in a valve seat. The small head end of the push rod sequentially penetrates through the first through hole, the first spring cavity, the second through hole and the second spring cavity and then extends out of the valve body, the first spring is arranged on the push rod in a sleeving mode and located in the first spring cavity, and the portion, extending out of the valve body, of the push rod is sleeved with an operation sleeve partially extending into the second spring cavity. The valve body is provided with a limiting sleeve surrounding the operation sleeve, the operation sleeve is provided with a limiting pin, the inner wall of the limiting sleeve is provided with a first sliding groove and a second sliding groove which are matched with the limiting pin and are communicated in port, and the end of the limiting pin is located in the first sliding groove. The manual structure of the two-position three-way electromagnetic valve is simple and reliable, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve. Background Art

[0002] A two-position three-way solenoid valve is a valve that drives the valve block through the electromagnetic coil to move the valve core in the sleeve, so that the valve core conducts the medium through holes at different positions on the sleeve, thereby changing the flow direction of the medium. It is widely used in marine engineering, mobile machinery, CNC equipment, industrial equipment, energy technology and metallurgy.

[0003] The two-position three-way solenoid valve in the prior art is generally provided with a manual operation structure for emergency use. However, the structure of the existing manual operation structure is not reasonable enough, resulting in inconvenient operation and easy misoperation due to accidental touch, which affects the normal operation of the solenoid valve.

[0004] In view of the above problems, the present invention makes improvements. Summary of the Invention

[0005] The utility model provides a two-position three-way solenoid valve, which solves the above-mentioned problems existing in the prior art during use.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A two-position three-way solenoid valve comprises a valve body, a valve block, a valve core, a sleeve and a first spring, wherein the valve block is slidably arranged in the valve body, the sleeve is fixedly connected to the valve body, the valve core is slidably arranged in the sleeve and is fixedly connected to the valve block, and further comprises a T-shaped push rod, a first through hole and a first spring cavity communicating with the first through hole are provided in the valve block, a second through hole aligned with the first through hole and a second spring cavity communicating with the second through hole are provided in the valve body, the small end of the push rod passes through the first through hole, the first spring cavity, the second through hole and the second spring cavity in sequence and then extends out of the valve body, the first The spring sleeve is arranged on the push rod and is located in the first spring cavity. The part of the push rod extending out of the valve body is sleeved with an operating sleeve that matches the second spring cavity and partially extends into the second spring cavity. The push rod is sleeved with a first retaining ring that rests on the end face of the operating sleeve. The valve body is provided with a limit sleeve surrounding the operating sleeve, and the operating sleeve is provided with a limit pin. The inner wall of the limit sleeve is provided with a first slide groove and a second slide groove that matches the limit pin and is connected to the port. The first slide groove extends along the circumferential direction of the limit sleeve, and the second slide groove extends along the length direction of the limit sleeve. The end of the limit pin is located in the first slide groove.

[0008] Preferably, the push rod is sleeved with a second spring located in a second spring cavity, and the inner wall of the limiting sleeve is provided with a third sliding groove extending along the length direction of the limiting sleeve and connected to the other end of the first sliding groove.

[0009] Preferably, the push rod is sleeved with a third spring located inside the second spring.

[0010] Preferably, a mounting hole matching the limit pin and passing through the operating sleeve is opened on the peripheral side surface of the operating sleeve, the limit pin is inserted into the mounting hole, and the push rod passes through the limit pin.

[0011] Preferably, a mounting cavity communicating with the second spring cavity and matching with the limiting sleeve is provided in the valve body, and the limiting sleeve is expanded and tightened in the mounting cavity.

[0012] Preferably, a knob is fixedly connected to the operating sleeve.

[0013] Preferably, a sealing cavity connected to the second through hole and aligned with the first spring cavity is provided in the valve body, and a second retaining ring, a sealing ring and a spring seat located in the sealing cavity are sleeved on the push rod. The spring seat is expanded in the sealing cavity to compress the sealing ring, and the end of the first spring rests on the spring seat.

[0014] To sum up, the beneficial effect of the present invention is that: when the electromagnetic coil installed on the valve body is ineffective and the valve needs to be manually operated, the operating sleeve is rotated to drive the limit pin to slide in the first slide groove to the end of the second slide groove. At this time, the operating sleeve can be pulled outward to cause the limit pin to slide in the second slide groove. The operating sleeve drives the push rod to move outward through the first retaining ring on the end surface, and the push rod drives the valve block to move inward in the valve body through its large head end against the first through-hole port, thereby driving the valve core to slide inward in the plug sleeve to realize the flow direction conversion of the medium. It can be seen that the manual operation structure of this two-position three-way solenoid valve is simple and reliable, and it is very convenient and quick to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0018] Figure 3 This is an exploded schematic diagram of the connection between the operating sleeve, the limiting sleeve and the push rod in the present utility model;

[0019] Figure 4It is a structural diagram of the limiting sleeve in the utility model.

[0020] In the figure: 1. valve body; 101. second through hole; 102. second spring chamber; 103. mounting chamber; 104. sealing chamber; 2. valve block; 21. first through hole; 22. first spring chamber; 3. valve core; 4. insert sleeve; 5. first spring; 6. push rod; 61. first retaining ring; 7. operating sleeve; 71. mounting hole; 8. limit pin; 9. limit sleeve; 91. first slide groove; 92. second slide groove; 93. third slide groove; 10. second spring; 11. third spring; 12. knob; 13. second retaining ring; 14. sealing ring; 15. spring seat. DETAILED DESCRIPTION

[0021] The following is a combination of the appended examples of the present invention Figure 1-4 , clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] As shown in the figure, a two-position three-way solenoid valve includes a valve body 1, a valve block 2, a valve core 3, a sleeve 4 and a first spring 5. The valve block 2 is slidably arranged in the valve body 1, the sleeve 4 is fixedly connected to the valve body 1, the valve core 3 is slidably arranged in the sleeve 4 and is fixedly connected to the valve block 2, and also includes a T-shaped push rod 6. A first through hole 21 and a first spring cavity 22 connected to the first through hole 21 are provided in the valve block 2. A second through hole 101 aligned with the first through hole 21 and a second spring cavity 102 connected to the second through hole 101 are provided in the valve body 1. The small end of the push rod 6 passes through the first through hole 21, the first spring cavity 22, the second through hole 101 and the second spring cavity 102 in sequence and then extends out of the valve body. 1, the first spring 5 is sleeved on the push rod 6 and located in the first spring cavity 22, the part of the push rod 6 extending out of the valve body 1 is sleeved with an operating sleeve 7 that matches the second spring cavity 102 and partially extends into the second spring cavity 102, the push rod 6 is sleeved with a first retaining ring 61 that rests on the end face of the operating sleeve 7, the valve body 1 is provided with a limit sleeve 9 surrounding the operating sleeve 7, the operating sleeve 7 is provided with a limit pin 8, the inner wall of the limit sleeve 9 is provided with a first slide groove 91 and a second slide groove 92 that matches the limit pin 8 and is connected to the port, the first slide groove 91 extends along the circumferential direction of the limit sleeve 9, the second slide groove 92 extends along the length direction of the limit sleeve 9, and the end of the limit pin 8 is located in the first slide groove 91.

[0023] Specifically, the limiting sleeve 9 is provided on the valve body 1 in the following structure:

[0024] The valve body 1 is provided with an installation cavity 103 which is connected with the second spring cavity 102 and matches the limiting sleeve 9. The limiting sleeve 9 is tightened in the installation cavity 103. The above structure facilitates the assembly of the limiting sleeve 9 and ensures the stability of the connection between the limiting sleeve 9 and the valve body 1.

[0025] Specifically, the limit pin 8 is provided on the operating sleeve 7 in the following structure:

[0026] The operating sleeve 7 is provided with a mounting hole 71 on the side surface thereof, which matches the limit pin 8 and passes through the operating sleeve 7. The limit pin 8 is inserted into the mounting hole 71, and the push rod 6 passes through the limit pin 8. The above structure facilitates the assembly of the limit pin 8 and ensures the stability of the connection between the limit pin 8 and the operating sleeve 7.

[0027] In the above embodiment, the electromagnetic coil is installed on the valve body 1. When the electromagnetic coil is energized, the valve block 2 is driven to move inward in the valve body 1, and the valve core 3 is driven to move inward in the socket 4, so that the medium through hole on the valve core 3 is connected with the medium through hole on the inner side of the socket 4 and the medium through hole on the outer side of the socket 4 is covered. After the electromagnetic coil is de-energized, the valve block 2 moves outward in the valve body 1 under the action of the first spring 5, and the valve core 3 is driven to move outward in the socket 4, so that the medium through hole on the valve core 3 is connected with the medium through hole on the outer side of the socket 4 and the medium through hole on the inner side of the socket 4 is covered, thereby realizing the conversion of the medium flow direction. When the coil is ineffective and the valve needs to be emergency operated, the operating sleeve 7 is rotated to drive the limit pin 8 to slide in the first slide groove 91 to the end of the second slide groove 92. At this time, the operating sleeve 7 can be pulled outward to make the limit pin 8 slide in the second slide groove 92. The operating sleeve 7 drives the push rod 6 to move outward through the first retaining ring 61 on the end surface. The push rod 6 drives the valve block 2 to move inward in the valve body 1 by its large head end against the port of the first through hole 21, thereby driving the valve core 3 to slide inward in the plug sleeve 4 to realize the flow direction conversion of the medium. In the above structure and working method, the manual operation structure is simple and reliable, and the operation is very convenient and quick.

[0028] Preferably, the push rod 6 is sleeved with a second spring 10 located in the second spring cavity 102, and the inner wall of the limiting sleeve 9 is provided with a third slide groove 93 extending along the length direction of the limiting sleeve 9 and connected to the other end of the first slide groove 91. When the operating sleeve 7 is rotated to make the limiting pin 8 slide in the first slide groove 91 to the end of the third slide groove 93, the operating sleeve 7 slides outward under the action of the second spring 10 and drives the limiting pin 8 to slide into the third slide groove 93. The limiting pin 8 is limited by the third slide groove 93, so that the operating sleeve 7 cannot rotate freely at this time. When manual operation is required, it is necessary to first press inward. Press the operating sleeve 7 and then rotate the operating sleeve 7 to operate, thereby preventing the operating sleeve 7 from being operated incorrectly and ensuring the stability of the solenoid valve during normal operation. When operating the operating sleeve 7 to make the limit pin 8 slide to the end of the second slide groove 92, the second spring 10 pushes the operating sleeve 7 to slide outward quickly, and the operating table drives the valve block 2 and the valve core 3 to move quickly to achieve rapid switching of the medium flow direction, meeting the speed requirements during emergency operation. Of course, the second spring 10 pushes the operating table to drive the valve core 3 to move only partially. To ensure complete emergency movement, the operating sleeve 7 needs to be pulled to its maximum stroke.

[0029] Preferably, the push rod 6 is provided with a third spring 11 located inside the second spring 10. The third spring 11 cooperates with the second spring 10 to push the operating sleeve 7, thereby strengthening the force on the operating sleeve 7, thereby ensuring that the operating sleeve 7 can resist the elastic force of the first spring 5 to move.

[0030] Preferably, a knob 12 is fixedly connected to the operating sleeve 7 . Specifically, the knob 12 is screwed onto the operating sleeve 7 and covers the end of the push rod 6 . The knob 12 facilitates the rotation, push-pull operation of the operating sleeve 7 .

[0031] Preferably, a sealing cavity 104 is provided in the valve body 1, which is connected to the second through hole 101 and aligned with the first spring cavity 22. The push rod 6 is sleeved with a second retaining ring 13, a sealing ring 14 and a spring seat 15 located in the sealing cavity 104. The spring seat 15 is expanded and tightened in the sealing cavity 104 to compress the sealing ring 14. The end of the first spring 5 rests on the spring seat 15, and the sealing performance of the interior of the valve body 1 is enhanced by the action of the sealing ring 14.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-position three-way solenoid valve, comprising a valve body (1), a valve block (2), a valve core (3), a sleeve (4) and a first spring (5), wherein the valve block (2) is slidably disposed in the valve body (1), the sleeve (4) is fixedly connected to the valve body (1), and the valve core (3) is slidably disposed in the sleeve (4) and fixedly connected to the valve block (2), characterized in that: The valve block (2) further comprises a T-shaped push rod (6); a first through hole (21) and a first spring chamber (22) connected to the first through hole (21) are provided in the valve block (2); a second through hole (101) aligned with the first through hole (21) and a second spring chamber (102) connected to the second through hole (101) are provided in the valve body (1); a small end of the push rod (6) sequentially passes through the first through hole (21), the first spring chamber (22), the second through hole (101) and the second spring chamber (102) and then extends out of the valve body (1); the first spring (5) is sleeved on the push rod (6) and located in the first spring chamber (22); a spring (5) sleeved on the portion of the push rod (6) extending out of the valve body (1) and connected to the second spring chamber (22) is sleeved on the portion of the push rod (6) extending out of the valve body (1) An operating sleeve (7) matching the second spring chamber (102) and partially extending into the second spring chamber (102), a first retaining ring (61) being sleeved on the push rod (6) and abutting against the end surface of the operating sleeve (7), a limiting sleeve (9) surrounding the operating sleeve (7) being provided on the valve body (1), a limiting pin (8) being provided on the operating sleeve (7), a first slide groove (91) and a second slide groove (92) matching the limiting pin (8) and communicating with each other through ports being provided on the inner wall of the limiting sleeve (9), the first slide groove (91) extending along the circumferential direction of the limiting sleeve (9), the second slide groove (92) extending along the length direction of the limiting sleeve (9), and an end of the limiting pin (8) being located in the first slide groove (91).

2. A two-position three-way solenoid valve according to claim 1, characterized in that: The push rod (6) is sleeved with a second spring (10) located in a second spring chamber (102), and the inner wall of the limiting sleeve (9) is provided with a third sliding groove (93) extending along the length direction of the limiting sleeve (9) and communicating with the other end of the first sliding groove (91).

3. A two-position three-way solenoid valve according to claim 2, characterized in that: The push rod (6) is sleeved with a third spring (11) located inside the second spring (10).

4. A two-position three-way solenoid valve according to claim 1, characterized in that: A mounting hole (71) matching with the limit pin (8) and penetrating the operating sleeve (7) is provided on the peripheral side surface of the operating sleeve (7); the limit pin (8) is inserted into the mounting hole (71), and the push rod (6) passes through the limit pin (8).

5. A two-position three-way solenoid valve according to claim 4, characterized in that: The valve body (1) is provided with an installation cavity (103) which is in communication with the second spring cavity (102) and matches the limiting sleeve (9), and the limiting sleeve (9) is expanded and tightened in the installation cavity (103).

6. A two-position three-way solenoid valve according to claim 1, characterized in that: A knob (12) is fixedly connected to the operating sleeve (7).

7. A two-position three-way solenoid valve according to claim 1, characterized in that: The valve body (1) is provided with a sealing cavity (104) which is in communication with the second through hole (101) and aligned with the first spring cavity (22); the push rod (6) is sleeved with a second retaining ring (13), a sealing ring (14) and a spring seat (15) which are located in the sealing cavity (104); the spring seat (15) is expanded and tightened in the sealing cavity (104) to compress the sealing ring (14); and the end of the first spring (5) abuts against the spring seat (15).

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