Electro-hydraulic valve applied to low-temperature environment

Abstract

The utility model belongs to the technical field of valve bodies, and relates to an electro-hydraulic valve applied to a low-temperature environment, which comprises a valve body, the valve body is provided with an inlet and an outlet, a valve core component is arranged in an inner cavity of the valve body so as to control connection and disconnection between the inlet and the outlet, and the valve core component is limited in the inner cavity of the valve body through a valve cover; the valve element assembly comprises a cylinder sleeve, the cylinder sleeve is limited in an inner cavity of the valve body, a piston is arranged in an inner cavity of the cylinder sleeve in a matched mode and can axially move in the cylinder sleeve in a reciprocating mode, a spring is arranged in a piston cavity of the piston, and one end of the spring is pressed at the bottom of the inner cavity of the piston. The electro-hydraulic valve is reasonable and ingenious in structure, and the problem that when an existing electro-hydraulic valve is used in a low-temperature state, a piston is stuck due to the fact that accumulated water in the electro-hydraulic valve is frozen is solved; when the valve works, redundant water in the piston can be preferentially discharged through the guide pipe, it is ensured that when the valve works, the situation that the piston is stuck due to accumulated water freezing is avoided, and then it is ensured that the valve can be normally opened.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve bodies and relates to an electro-hydraulic valve used in low-temperature environments. Background Art

[0002] Electro-hydraulic valves are used on pipelines for refined oil products. During operation, moisture mixed in the oil pipelines gathers inside the valve body. In northern regions, moisture gathers inside the valve body and freezes in winter, causing the piston to get stuck and the valve to be unable to open. Summary of the Invention

[0003] In view of the above problems, the present utility model provides an electro-hydraulic valve for use in low-temperature environments. The electro-hydraulic valve can be reliably used in low-temperature cold areas.

[0004] According to the technical solution of the present invention: an electro-hydraulic valve used in a low-temperature environment, comprising a valve body, the valve body being provided with an inlet and an outlet, a valve core assembly being arranged in the inner cavity of the valve body to control the on-off between the inlet and the outlet, and the valve core assembly being limited in the inner cavity of the valve body by a valve cover; characterized in that: the valve core assembly comprises a cylinder sleeve, the cylinder sleeve being limited in the inner cavity of the valve body, a piston being provided in the inner cavity of the cylinder sleeve, the piston being able to move axially back and forth in the cylinder sleeve, a spring being provided in the piston cavity of the piston, one end of the spring being pressed against the bottom of the inner cavity of the piston, and the other end being pressed against the bottom surface of the valve cover, a joint being installed on the valve cover, a guide tube being installed at the inner end of the joint, and when the valve is in the open state, the guide tube extending to the bottom of the piston cavity.

[0005] As a further improvement of the present invention, a first sealing ring is provided between the valve cover and the valve body, and a second sealing ring is provided between the valve cover and the end face of the cylinder sleeve; the cylindrical portion of the valve cover extends into the cylinder sleeve and is positioned and limited by the step surface of the cylinder sleeve.

[0006] As a further improvement of the present invention, a third sealing ring is provided in the annular groove on the upper surface of the piston, and the third sealing ring forms a dynamic seal with the inner wall of the cylinder sleeve.

[0007] As a further improvement of the present invention, a limit ring and a limit seat are provided on the lower part of the inner wall of the cylinder liner, the lower part of the limit seat is limited by the limit ring, a fourth sealing ring is provided in the upper groove of the limit seat, the upper part of the fourth sealing ring extends out of the upper groove of the limit seat and abuts against the positioning step on the inner wall of the cylinder liner;

[0008] The bottom edge of the piston is configured as a limiting platform, which cooperates with the fourth sealing ring. The bottom of the piston is configured to have a downwardly extending protrusion corresponding to the middle of the limiting platform.

[0009] As a further improvement of the present invention, the bottom of the cylinder sleeve and the valve body are sealed by a fifth sealing ring.

[0010] As a further improvement of the present invention, a groove is provided in the middle of the circumferential surface of the piston to form a gap with the inner wall of the cylinder sleeve.

[0011] The technical effect of the utility model is that: the product structure of the utility model is reasonable and ingenious, and targeted improvements are made to the problem that when the existing electro-hydraulic valve is used in a low-temperature state, the piston is stuck due to internal water accumulation and freezing; when the product of the utility model is working, the excess water in the piston can be discharged preferentially through the guide pipe, ensuring that the piston will not be stuck due to water accumulation and freezing when the valve is working, thereby ensuring that the valve can be opened normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the utility model in a closed state.

[0013] Figure 2 This is a structural diagram of the utility model in the open state. DETAILED DESCRIPTION

[0014] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0015] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts should fall within the scope of protection of the present invention.

[0016] Figure 1 、 2 It includes a valve body 1, a cylinder sleeve 2, a piston 3, a valve cover 4, a spring 5, a guide pipe 6, a joint 7, an inlet 8, an outlet 9, a limit seat 10, a limit ring 11, a first sealing ring 12, a second sealing ring 13, a third sealing ring 14, a fourth sealing ring 15, a fifth sealing ring 16, etc.

[0017] like Figure 1 、 2As shown, the utility model is an electro-hydraulic valve for use in low-temperature environments, comprising a valve body 1, the valve body 1 being provided with an inlet 8 and an outlet 9, a valve core assembly being arranged in the inner cavity of the valve body 1 to control the on-off between the inlet 8 and the outlet 9, the valve core assembly being limited in the inner cavity of the valve body 1 by a valve cover 4; the valve core assembly comprising a cylinder sleeve 2, the cylinder sleeve 2 being limited in the inner cavity of the valve body 1, a piston 3 being provided in the inner cavity of the cylinder sleeve 2, the piston 3 being capable of axially reciprocating movement in the cylinder sleeve 2, a spring 5 being provided in the piston cavity of the piston 3, one end of the spring 5 being pressed against the bottom of the inner cavity of the piston 3, and the other end being pressed against the bottom surface of the valve cover 4, a joint 7 being installed on the valve cover 4, a guide pipe 6 being installed at the inner end of the joint 7, and when the valve is in the open state, the guide pipe 6 extending to the bottom of the piston cavity to achieve the function of discharging moisture in the piston (water has a larger specific gravity and is deposited at the bottom of the piston 3, while oil has a lighter specific gravity and floats on the upper part of the cylinder sleeve 2), thereby preventing ice from forming in winter.

[0018] A first sealing ring 12 is provided between the valve cover 4 and the valve body 1 , and a second sealing ring 13 is provided between the valve cover 4 and the end face of the cylinder liner 2 ; the cylindrical portion of the valve cover 4 extends into the cylinder liner 2 and is positioned and limited by the step surface of the cylinder liner 2 .

[0019] A third sealing ring 14 is provided in the annular groove on the upper surface of the piston 3 , and the third sealing ring 14 forms a dynamic seal with the inner wall of the cylinder sleeve 2 .

[0020] A limit ring 11 and a limit seat 10 are provided at the lower part of the inner wall of the cylinder liner 2. The lower part of the limit seat 10 is limited by the limit ring 11. A fourth sealing ring 15 is provided in the upper groove body of the limit seat 10. The upper part of the fourth sealing ring 15 extends out of the upper groove body of the limit seat 10 and rests on the positioning step of the inner wall of the cylinder liner 2.

[0021] The bottom edge of the piston 3 is formed into a limiting platform, which cooperates with the fourth sealing ring 15 , and the bottom of the piston 3 is formed into a downwardly extending protrusion corresponding to the middle of the limiting platform.

[0022] The bottom of the cylinder sleeve 2 and the valve body 1 are sealed by a fifth sealing ring 16 .

[0023] A groove is provided in the middle of the circumferential surface of the piston 3 to form a gap with the inner wall of the cylinder liner 2 .

[0024] like Figure 1 、 2 As shown, the present invention provides a guide tube 6 at the top of the valve to drain the water in the piston 3, thereby preventing ice from forming in winter, which would cause the piston to be unable to reciprocate, resulting in a stuck state and malfunction. The present invention can remove ice without disassembling the valve, thus avoiding a large amount of labor costs.

[0025] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An electro-hydraulic valve for use in a low-temperature environment, comprising a valve body (1), the valve body (1) being provided with an inlet (8) and an outlet (9), a valve core assembly being provided in an inner cavity of the valve body (1) to control the opening and closing between the inlet (8) and the outlet (9), the valve core assembly being limited in the inner cavity of the valve body (1) by a valve cover (4); characterized in that: The valve core assembly includes a cylinder sleeve (2), which is limited in the inner cavity of the valve body (1), and a piston (3) is arranged in the inner cavity of the cylinder sleeve (2). The piston (3) can move axially back and forth in the cylinder sleeve (2). A spring (5) is arranged in the piston cavity of the piston (3), and one end of the spring (5) is pressed against the bottom of the inner cavity of the piston (3), and the other end is pressed against the bottom surface of the valve cover (4). A joint (7) is installed on the valve cover (4), and a guide tube (6) is installed at the inner end of the joint (7). When the valve is open, the guide tube (6) extends to the bottom of the piston cavity.

2. The electro-hydraulic valve for use in low-temperature environments according to claim 1, characterized in that: A first sealing ring (12) is provided between the valve cover (4) and the valve body (1), and a second sealing ring (13) is provided between the valve cover (4) and the end surface of the cylinder sleeve (2); the barrel portion of the valve cover (4) extends into the cylinder sleeve (2) and is positioned and limited by the step surface of the cylinder sleeve (2).

3. The electro-hydraulic valve for use in a low-temperature environment according to claim 1, characterized in that: A third sealing ring (14) is provided in the annular groove on the upper surface of the piston (3), and the third sealing ring (14) forms a dynamic seal with the inner wall of the cylinder sleeve (2).

4. The electro-hydraulic valve for use in low-temperature environments according to claim 1, characterized in that: A limit ring (11) and a limit seat (10) are provided at the lower portion of the inner wall of the cylinder liner (2); the lower portion of the limit seat (10) is limited by the limit ring (11); a fourth sealing ring (15) is provided in the upper groove of the limit seat (10); the upper portion of the fourth sealing ring (15) extends out of the upper groove of the limit seat (10) and abuts against the positioning step of the inner wall of the cylinder liner (2); The bottom edge of the piston (3) is formed into a limiting platform, which cooperates with the fourth sealing ring (15). The bottom of the piston (3) is formed into a downwardly extending raised portion corresponding to the middle of the limiting platform.

5. The electro-hydraulic valve for use in low temperature environments according to claim 1, characterized in that: The bottom of the cylinder sleeve (2) and the valve body (1) are sealed via a fifth sealing ring (16).

6. The electro-hydraulic valve for use in low-temperature environments according to claim 1, characterized in that: A groove is provided in the middle of the circumferential surface of the piston (3) to form a gap with the inner wall of the cylinder sleeve (2).

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