High-pressure spacer bush type electromagnetic valve

Abstract

The high-pressure spacer bush type electromagnetic valve comprises a pilot head and a valve body, a valve cavity is formed in the valve body, a sealing assembly is fixedly arranged in the valve cavity, a valve rod is movably arranged in the sealing assembly in an inserted mode, and an air inlet, a first working opening, a second working opening, a first exhaust opening and a second exhaust opening which are communicated with the valve cavity are formed in the valve body. The sealing assembly comprises a sealing bush, a spacer bush A, a spacer bush B, a spacer bush C and a spacer bush D. The spacer bush A, the spacer bush B, the spacer bush C and the spacer bush D are sequentially arranged below the sealing bush in series in the axial direction, a Y-shaped ring A is arranged between the spacer bush A and the sealing bush, a Y-shaped ring B is arranged between the spacer bush A and the spacer bush B, a Y-shaped ring C is arranged between the spacer bush B and the spacer bush C, and a Y-shaped ring D is arranged between the spacer bush C and the spacer bush D. And a Y-shaped ring E is arranged between the spacer bush D and the valve body, the lip directions of the Y-shaped ring A, the Y-shaped ring D and the Y-shaped ring E face upwards, and the lip directions of the Y-shaped ring B and the Y-shaped ring C face downwards, so that a better sealing effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, and particularly relates to a high-pressure type spacer solenoid valve. Background Technique

[0002] The spacer solenoid valve mainly consists of an electromagnetic coil, a spacer, an iron core, a valve rod assembly, a valve body, etc. A seal is provided between the spacers. It has the characteristics of compact structure and fast response speed, and is widely used in the field of automatic control. The working principle of the spacer solenoid valve is to use the magnetic field generated by the electromagnetic coil to attract the iron core, so that the valve rod assembly moves to switch the gas path.

[0003] However, when the spacer solenoid valve is applied to a high-pressure environment, such as being used in a mine transport vehicle, the mine environment is harsh and the system pressure of the transport vehicle is relatively high, which makes the spacer solenoid valve need to bear a relatively high pressure. In order to ensure the normal operation of the spacer solenoid valve in a high-pressure environment, its sealing performance needs to be ensured. However, conventional seals such as O-rings and flat rings are prone to loosening in a high-pressure environment, which will affect the sealing between the spacers, and then cause air leakage, affecting the normal operation of the solenoid valve. Therefore, it is necessary to make improvements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high-pressure type spacer solenoid valve aiming at the defects and deficiencies of the prior art, which has a simple and reasonable structure, is convenient to operate, has good sealing effect in a high-pressure environment, is not easy to leak air, and the lip of the Y-shaped ring can be expanded by force to make the fit with the sealed surface closer, improving the sealing performance.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-pressure type spacer solenoid valve shown in the utility model includes a pilot head and a valve body. A valve cavity is provided in the valve body, and a sealing assembly is fixedly provided in the valve cavity. A valve rod is movably inserted into the sealing assembly. The pilot head is arranged above the valve body to control the movement of the valve rod. An air inlet, a first working port, a second working port, a first exhaust port and a second exhaust port are respectively provided on the valve body and communicated with the valve cavity. The sealing assembly includes a sealing bushing, a spacer A corresponding to and cooperating with the first exhaust port, a spacer B corresponding to and cooperating with the first working port, a spacer C corresponding to and cooperating with the air inlet, and a spacer D corresponding to and cooperating with the second working port. The spacer A, spacer B, spacer C and spacer D are sequentially arranged in series below the sealing bushing along the axial direction. A Y-shaped ring A is provided between the spacer A and the sealing bushing, a Y-shaped ring B is provided between the spacer A and the spacer B, a Y-shaped ring C is provided between the spacer B and the spacer C, a Y-shaped ring D is provided between the spacer C and the spacer D, and a Y-shaped ring E is provided between the spacer D and the valve body. The lip directions of the Y-shaped ring A, Y-shaped ring D and Y-shaped ring E are upward, and the lip directions of the Y-shaped ring B and Y-shaped ring C are downward.

[0007] Further, a guiding hole is provided in the valve body, the sealing assembly is arranged in the guiding hole, the first exhaust port, the first working port, the air inlet, the second working port and the second exhaust port are arranged at intervals on both sides of the guiding hole, and a Y-shaped ring E is abutted between the spacer sleeve D and the bottom of the guiding hole.

[0008] Further, a manual switch is provided at the part where the valve body is connected to the pilot head.

[0009] Further, through holes are provided at the centers of the spacer sleeve A, the spacer sleeve B, the spacer sleeve C and the spacer sleeve D, and the valve stem is movably inserted into the through holes.

[0010] Further, flanges extending outwards are provided at both the upper and lower ends of the spacer sleeve A, the spacer sleeve B, the spacer sleeve C and the spacer sleeve D.

[0011] Further, a plurality of large-diameter portions and small-diameter portions are formed axially on the valve stem, and the large-diameter portions and the small-diameter portions are arranged at intervals and staggered.

[0012] Further, the lips of the Y-shaped ring A, the Y-shaped ring B, the Y-shaped ring C, the Y-shaped ring D and the Y-shaped ring E are in sealing fit with the large-diameter portions.

[0013] Further, an O-shaped ring is abutted between the sealing bushing and the valve body.

[0014] Further, a limiting step is provided at the lower end of the sealing bushing, and a limiting portion for limiting cooperation with the limiting step is provided on the valve stem.

[0015] Further, a C-shaped ring is abutted between the limiting portion and the sealing bushing.

[0016] The beneficial effects of the present utility model are as follows: A high-pressure type spacer sleeve solenoid valve of the present utility model has good sealing effect in a high-pressure environment and is not prone to air leakage. The valve stem moves between the first working position and the second working position in the valve cavity. When energized, the valve stem is at the first working position in the valve cavity. At this time, the air inlet is communicated with the second working port, and the first working port is communicated with the first exhaust port. When de-energized, the valve stem is at the second working position in the valve cavity. At this time, the air inlet is communicated with the first working port, and the second working port is communicated with the second exhaust port.

[0017] When the valve stem is at the first working position in the valve cavity, the lips of Y-ring A, Y-ring C, and Y-ring E are in sealing fit with the large-diameter part. The lip directions of Y-ring A and Y-ring E are upward. When air pressure acts on the upper sides of Y-ring A and Y-ring E, the lips of Y-ring A and Y-ring E are expanded by the force and the fit with the sealed surface becomes closer, improving the sealing performance. The lip direction of Y-ring C is downward. When air pressure acts on the lower side of Y-ring C, the lips of Y-ring C are expanded by the force and the fit with the sealed surface becomes closer, improving the sealing performance, preventing air intake from the air inlet to the first working port, and preventing air exhaust from the second working port to the second exhaust port. When the valve stem is at the second working position in the valve cavity, the lips of Y-ring A, Y-ring B, and Y-ring D are in sealing fit with the large-diameter part. The lip directions of Y-ring A and Y-ring D are upward. When air pressure acts on the upper sides of Y-ring A and Y-ring D, the lips of Y-ring A and Y-ring D are expanded by the force and the fit with the sealed surface becomes closer, improving the sealing performance. The lip direction of Y-ring B is downward. When air pressure acts on the lower side of Y-ring B, the lips of Y-ring B are expanded by the force and the fit with the sealed surface becomes closer, improving the sealing performance, preventing air intake from the air inlet to the second working port, and preventing air exhaust from the first working port to the first exhaust port. Brief Description of the Drawings

[0018] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0019] Figure 2 is Figure 1 an enlarged structural diagram of part A in

[0020] Figure 3 a structural diagram of the present utility model.

[0021] Figures 1-3 In the figure: 1, pilot head; 2, valve body; 21, manual switch; 3, air inlet; 41, first working port; 42, second working port; 51, first exhaust port; 52, second exhaust port; 6, sealing bushing; 61, limiting step; 62, O-ring; 71, spacer A; 72, spacer B; 73, spacer C; 74, spacer D; 75, flanging; 81, Y-ring A; 82, Y-ring B; 83, Y-ring C; 84, Y-ring D; 85, Y-ring E; 91, large-diameter part; 92, small-diameter part; 93, limiting part; 94, C-ring. Detailed Description of the Preferred Embodiments

[0022] The present utility model will be further described below with reference to the accompanying drawings.

[0023] As shown in Figures 1-3A high-pressure type spacer solenoid valve shown in the figure includes a pilot head 1 and a valve body 2. A valve cavity is provided in the valve body 2, and a sealing assembly is fixedly provided in the valve cavity. A valve rod is movably inserted into the sealing assembly. The pilot head 1 is arranged above the valve body 2 to control the movement of the valve rod. An air inlet 3, a first working port 41, a second working port 42, a first exhaust port 51, and a second exhaust port 52 are respectively provided on the valve body 2 and are communicated with the valve cavity. Preferably, in this embodiment, a guiding hole is provided in the valve body 2, and the sealing assembly is arranged in the guiding hole. The first exhaust port 51, the first working port 41, the air inlet 3, the second working port 42, and the second exhaust port 52 are arranged at intervals on both sides of the guiding hole. The sealing assembly includes a sealing bushing 6, a spacer A 71 corresponding to and cooperating with the first exhaust port 51, a spacer B 72 corresponding to and cooperating with the first working port 41, a spacer C 73 corresponding to and cooperating with the air inlet 3, and a spacer D 74 corresponding to and cooperating with the second working port 42. The spacer A 71, the spacer B 72, the spacer C 73, and the spacer D 74 are sequentially arranged axially below the sealing bushing 6. Preferably, in this embodiment, through holes are provided in the centers of the spacer A 71, the spacer B 72, the spacer C 73, and the spacer D 74, and the valve rod is movably inserted into the through holes. Refer to Figure 2 , a Y-shaped ring A 81 is provided between the spacer A 71 and the sealing bushing 6, a Y-shaped ring B 82 is provided between the spacer A 71 and the spacer B 72, a Y-shaped ring C 83 is provided between the spacer B 72 and the spacer C 73, a Y-shaped ring D 84 is provided between the spacer C 73 and the spacer D 74, and a Y-shaped ring E 85 is provided between the spacer D 74 and the bottom of the guiding hole. The lip directions of the Y-shaped ring A 81, the Y-shaped ring D 84, and the Y-shaped ring E 85 are upward, and the lip directions of the Y-shaped ring B 82 and the Y-shaped ring C 83 are downward, which can better achieve the sealing effect and is not prone to air leakage under high-pressure environments.

[0024] Preferably, in this embodiment, the valve rod axially forms a plurality of large-diameter portions 91 and small-diameter portions 92, and the large-diameter portions 91 and the small-diameter portions 92 are arranged at intervals and staggered to realize the switching of the gas path. Specifically, the so-called large diameter and small diameter mean that the diameter of the large-diameter portion 91 is larger than the diameter of the small-diameter portion 92. Preferably, in this embodiment, the lips of the Y-shaped ring A 81, the Y-shaped ring B 82, the Y-shaped ring C 83, the Y-shaped ring D 84, and the Y-shaped ring E 85 are in sealing cooperation with the large-diameter portion 91 to prevent gas leakage.

[0025] The pilot head 1 includes a coil, a static iron core, a moving iron core, and a spring. The static iron core is fixedly arranged inside the coil. The moving iron core is slidably arranged at the lower end of the static iron core. The spring is arranged between the moving iron core and the static iron core for resetting the moving iron core. When the coil is energized, the static iron core generates a magnetic field, and the moving iron core is forced to overcome the spring force and move upward to engage with the static iron core. When the coil is de-energized, the moving iron core resets under the action of the spring force. A pilot valve cavity is provided inside the pilot head 1. A valve port is provided between the pilot valve cavity and the valve cavity. The moving iron core abuts against the valve port. After being energized, the valve port opens, and the gas in the pilot valve cavity enters the valve cavity to control the movement of the valve stem. After being de-energized, the valve stem resets under the action of air pressure.

[0026] The valve stem moves between the first working position and the second working position in the valve cavity. When energized, the valve stem is in the first working position in the valve cavity. At this time, the air inlet 3 is communicated with the second working port 42, and the first working port 41 is communicated with the first exhaust port 51. When de-energized, the valve stem is in the second working position in the valve cavity. At this time, the air inlet 3 is communicated with the first working port 41, and the second working port 42 is communicated with the second exhaust port 52.

[0027] When the valve stem is in the first working position in the valve cavity, the lips of the Y-shaped ring A81, the Y-shaped ring C83, and the Y-shaped ring E85 are in sealing fit with the large-diameter part 91. The lip directions of the Y-shaped ring A81 and the Y-shaped ring E85 are upward. When air pressure acts on the upper sides of the Y-shaped ring A81 and the Y-shaped ring E85, the lips of the Y-shaped ring A81 and the Y-shaped ring E85 are forced to expand, and the fit between them and the sealed surface becomes tighter, improving the sealing performance. The lip direction of the Y-shaped ring C83 is downward. When air pressure acts on the lower side of the Y-shaped ring C83, the lips of the Y-shaped ring C83 are forced to expand, and the fit between them and the sealed surface becomes tighter, improving the sealing performance, preventing the air inlet 3 from admitting air to the first working port 41, and preventing the second working port 42 from exhausting air to the second exhaust port 52.

[0028] When the valve stem is in the second working position in the valve cavity, the lips of the Y-shaped ring A81, the Y-shaped ring B82, and the Y-shaped ring D84 are in sealing fit with the large-diameter part 91. The lip directions of the Y-shaped ring A81 and the Y-shaped ring D84 are upward. When air pressure acts on the upper sides of the Y-shaped ring A81 and the Y-shaped ring D84, the lips of the Y-shaped ring A81 and the Y-shaped ring D84 are forced to expand, and the fit between them and the sealed surface becomes tighter, improving the sealing performance. The lip direction of the Y-shaped ring B82 is downward. When air pressure acts on the lower side of the Y-shaped ring B82, the lips of the Y-shaped ring B82 are forced to expand, and the fit between them and the sealed surface becomes tighter, improving the sealing performance, preventing the air inlet 3 from admitting air to the second working port 42, and preventing the first working port 41 from exhausting air to the first exhaust port 51.

[0029] When the high-pressure type spacer solenoid valve described in the present utility model works, it needs to maintain an energized state. Preferably, in this embodiment, a manual switch 21 is provided at the connection part between the valve body 2 and the pilot head 1. The manual switch 21 is provided with a lever, and the lever is arranged in the pilot valve chamber. The user rotates the manual switch 21 in the circumferential direction to make the lever act on the moving iron core, thereby manually controlling the opening and closing of the valve port. Manual control is added on the basis of electric control. In the event of power failure or other emergencies, the operator can still use the manual switch 21 for control, thereby preventing the occurrence of potential dangerous situations.

[0030] Preferably, in this embodiment, flanges 75 extending outwards are provided at both the upper and lower ends of the spacer A 71, spacer B 72, spacer C 73, and spacer D 74, so that they are not easily displaced in the guide hole.

[0031] Preferably, in this embodiment, an O-ring 62 is provided between the sealing bushing 6 and the valve body 2 to further improve the sealing performance between the sealing bushing 6 and the valve body 2.

[0032] Preferably, in this embodiment, a limiting step 61 is provided at the lower end of the sealing bushing 6, and the valve stem is provided with a limiting portion 93 that is in limiting cooperation with the limiting step 61, effectively limiting the valve stem and preventing the valve stem from moving excessively and affecting the use.

[0033] Preferably, in this embodiment, a C-ring 94 is provided between the limiting portion 93 and the sealing bushing 6 to further improve the sealing performance between the valve stem and the sealing bushing 6.

[0034] The above is only the preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made according to the structure, features, and principles described in the scope of the patent application of the present utility model are included in the scope of the patent application of the present utility model.

Claims

1. A high-pressure sleeve type solenoid valve, comprising a pilot head (1) and a valve body (2), wherein a valve cavity is provided in the valve body (2), a sealing assembly is fixedly provided in the valve cavity, a valve stem is movably inserted in the sealing assembly, the pilot head (1) is arranged above the valve body (2) to control the movement of the valve stem, and the valve body (2) is respectively provided with an air inlet (3) connected to the valve cavity, a first working port (41), a second working port (42), a first exhaust port (51) and a second exhaust port (52), wherein: The sealing assembly comprises a sealing bushing (6), a spacer sleeve A (71) corresponding to the first exhaust port (51), a spacer sleeve B (72) corresponding to the first working port (41), a spacer sleeve C (73) corresponding to the air inlet (3) and a spacer sleeve D (74) corresponding to the second working port (42), wherein the spacer sleeve A (71), the spacer sleeve B (72), the spacer sleeve C (73) and the spacer sleeve D (74) are sequentially arranged in series below the sealing bushing (6) along the axial direction, and a Y-shaped ring is provided between the spacer sleeve A (71) and the sealing bushing (6). A (81), a Y-ring B (82) is abutted between the spacer A (71) and the spacer B (72), a Y-ring C (83) is abutted between the spacer B (72) and the spacer C (73), a Y-ring D (84) is abutted between the spacer C (73) and the spacer D (74), and a Y-ring E (85) is abutted between the spacer D (74) and the valve body (2), the lips of the Y-ring A (81), the Y-ring D (84) and the Y-ring E (85) are directed upward, and the lips of the Y-ring B (82) and the Y-ring C (83) are directed downward.

2. A high pressure sleeve type solenoid valve according to claim 1, characterized in that: A guide hole is provided in the valve body (2), the sealing assembly is arranged in the guide hole, the first exhaust port (51), the first working port (41), the air inlet (3), the second working port (42) and the second exhaust port (52) are arranged at intervals on both sides of the guide hole, and a Y-shaped ring E (85) is provided between the spacer sleeve D (74) and the bottom of the guide hole.

3. A high pressure sleeve type solenoid valve according to claim 1, characterized in that: A manual switch (21) is provided at the location where the valve body (2) is connected to the pilot head (1).

4. A high pressure sleeve type solenoid valve according to claim 1, characterized in that: Through holes are provided at the centers of the spacer sleeves A (71), B (72), C (73) and D (74), and the valve stems are movably inserted into the through holes.

5. A high pressure sleeve type solenoid valve according to claim 1, characterized in that: The upper and lower ends of the spacer sleeve A (71), the spacer sleeve B (72), the spacer sleeve C (73) and the spacer sleeve D (74) are all provided with outward flanges (75).

6. A high pressure sleeve type solenoid valve according to claim 1, characterized in that: The valve stem is formed with a plurality of large diameter portions (91) and small diameter portions (92) along the axial direction, and the large diameter portions (91) and the small diameter portions (92) are arranged alternately at intervals.

7. A high pressure sleeve type solenoid valve according to claim 6, characterized in that: The lips of the Y-ring A (81), the Y-ring B (82), the Y-ring C (83), the Y-ring D (84), and the Y-ring E (85) are in sealing cooperation with the large diameter portion (91).

8. A high pressure sleeve type solenoid valve according to claim 1, characterized in that: An O-ring (62) is disposed between the sealing bushing (6) and the valve body (2).

9. A high pressure sleeve type solenoid valve according to claim 1, characterized in that: The lower end of the sealing bushing (6) is provided with a limiting step (61), and the valve stem is provided with a limiting portion (93) that cooperates with the limiting step (61) in limiting position.

10. A high pressure sleeve type solenoid valve according to claim 9, characterized in that: A C-shaped ring (94) is disposed between the limiting portion (93) and the sealing bushing (6).

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