Release valve

Abstract

The utility model discloses a release valve which comprises a valve body, a release port and a discharge port are formed in the valve body, and a ball body for controlling the opening degree of the release port is arranged at the release port. A valve rod is arranged in the valve body in a penetrating mode, the valve rod is in threaded connection with the valve body, and the valve rod can move towards the interior or the exterior of the valve body by rotating the valve rod, so that the valve rod pushes the ball body to control the opening degree of the discharging opening. A sealing ring is arranged between the valve rod and the valve body, and the sealing ring can move in the valve body along with the valve rod. According to the utility model, the valve rod in threaded connection with the valve body is arranged in the valve body, so that the opening degree of the discharge port of the valve body is controlled, and the medium flow is adjusted by the valve body; and secondly, the sealing ring is arranged at the joint of the valve body and the valve rod, so that the problem that a medium leaks from the joint of the valve body and the valve rod is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a discharge valve. Background Art

[0002] The relief valve adjusts the flow of the medium by controlling the opening of the opening and closing parts in the valve body. It is generally installed on the equipment or pipelines of the closed system to ensure that the medium pressure in the equipment and pipelines is below the set pressure, protecting the equipment and pipelines and preventing accidents.

[0003] At present, mechanical relief valves are often used to release pressure in equipment or pipelines of closed systems. During adjustment, the flow of the relief valve is controlled by rotating the valve stem. However, during the use of existing mechanical relief valves, the medium in the relief valve often leaks from the valve stem, causing pollution and preventing the set pressure from being reached in the equipment or pipelines of the closed system. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide a discharge valve to overcome medium leakage.

[0005] In order to achieve the above technical objectives and effects, the utility model is implemented through the following technical solutions:

[0006] A relief valve comprises a valve body, wherein a relief port and a discharge port are formed on the valve body, and a ball for controlling the opening of the relief port is arranged at the relief port; a valve stem is passed through the valve body, and the valve stem and the valve body are threadedly connected, and the valve stem can be moved into or out of the valve body by rotating the valve stem, so that the valve stem pushes the ball to control the opening size of the relief port; a sealing ring is arranged between the valve stem and the valve body, and the sealing ring can move within the valve body along with the valve stem.

[0007] Furthermore, a connecting hole for the valve stem to pass through is formed on the valve body, and the connecting hole includes a straight section and an internal thread section.

[0008] Furthermore, the aperture of the straight segment is smaller than the outer diameter of the sealing ring.

[0009] Furthermore, the valve stem is partially inserted into the valve body, and the front end of the valve stem inserted into the valve body is provided with an external thread; a sealing groove for installing the sealing ring is provided on the outer surface of the valve stem adjacent to the external thread.

[0010] Furthermore, the diameter of the sealing groove at the bottom is larger than the aperture of the sealing ring.

[0011] Furthermore, the outer surface of one end of the valve stem located outside the valve body is configured to be hexagonal.

[0012] Furthermore, a hexagonal countersunk hole is formed on an end surface of one end of the valve stem located outside the valve body.

[0013] Furthermore, a detachable limiting pin is provided on the valve body.

[0014] The beneficial effects of the utility model are as follows: the utility model realizes the control of the opening of the above-mentioned discharge port of the valve body and the regulation of the medium flow by the valve body by arranging a valve stem threadedly connected to the valve body in the valve body; secondly, by arranging a sealing ring at the connection between the valve body and the valve stem, the problem of medium leakage from the connection between the valve body and the valve stem is effectively overcome.

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a discharge cross-sectional view of the utility model.

[0018] Explanation of the numbers in the figure: 1. valve body; 2. valve stem; 3. sealing ring; 4. ball; 5. limit pin; 11. discharge port; 12. discharge port; 13. connecting hole; 131. straight line segment; 132. internal thread segment; 21. external thread; 22. sealing groove. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0020] It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like in the embodiments of the utility model is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the patent of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the patent of the present invention; in addition, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the patent of the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 As shown, a relief valve comprises a valve body 1, on which a relief port 11 and a discharge port 12 are provided, and a ball 4 for controlling the opening of the relief port 11 is provided at the relief port 11; a valve stem 2 is passed through the valve body 1, and the valve stem 2 is threadedly connected to the valve body 1, and the valve stem 2 can be moved inward or outward of the valve body 1 by rotating the valve stem 2, so that the valve stem 2 pushes the ball 4 to control the opening size of the relief port 11; a sealing ring 3 is provided between the valve stem 2 and the valve body 1, and the sealing ring 3 can move in the valve body 1 with the valve stem 2; and in this embodiment, the sealing ring 3 is an O-ring; during operation, the medium enters the valve body 1 from the relief port 11 and is transported to the corresponding equipment or pipeline through the discharge port 12.

[0022] Continue to see Figure 1 As shown, the valve body 1 is provided with a connecting hole 13 for the valve stem 2 to pass through, and the connecting hole 13 includes a straight section 131 and an internal thread section 132; and in this embodiment, the straight section 131 is connected to the outer surface of the valve body 1; when the valve stem 2 is passed through the valve body 1, the sealing ring 3 is located between the valve stem 2 and the straight section 131, and the sealing ring 3 can be displaced in the straight section 131 along with the valve stem 2.

[0023] Continue to see Figure 1As shown, the valve stem 2 is partially penetrated in the valve body 1, and the front end of the valve stem 2 penetrated in the valve body 1 is provided with an external thread 21. When the valve stem 2 is penetrated in the valve body 1, the valve stem 2 is connected to the valve body 1 through the cooperation of the external thread 21 and the internal thread section 132. In this embodiment, when the valve stem 2 is screwed into the valve body 1, the ball 4 moves toward the discharge port 11, and the opening size of the discharge port 11 is reduced or even closed. When the valve stem 2 is screwed out of the valve body 1, the ball 4 moves away from the discharge port 11, and the opening size of the discharge port 11 is increased, thereby realizing the control of the opening of the discharge port 11 by the valve stem 2, and then realizing the control of the medium flow in the valve body 1.

[0024] Continue to see Figure 1 As shown, a circle of sealing groove 22 is provided on the outer surface of the valve stem 2 adjacent to the external thread 21, and the sealing ring 3 is installed on the valve stem 2 through the sealing groove 22, so that the sealing ring 3 can be synchronously displaced with the valve stem 2; in the present embodiment, the sealing ring 3 protrudes from the sealing groove 22, and the diameter of the sealing groove 22 at the bottom is larger than the aperture of the sealing ring 3, and the aperture of the straight segment 131 is slightly smaller than the outer diameter of the sealing ring 3, so that when the valve stem 2 is inserted into the valve body 1, the sealing ring 3 is pressed and fixed between the valve stem 2 and the straight segment 131, thereby effectively preventing the medium in the valve body 1 from leaking from the connection between the valve stem 2 and the valve body 1.

[0025] In the present embodiment, in order to facilitate the rotation of the valve stem 2, the outer surface of one end of the valve stem 2 located outside the valve body 1 is configured to be hexagonal; or, a hexagonal countersunk hole is opened on the end surface of one end of the valve stem 2 located outside the valve body 1.

[0026] Continue to see Figure 1 As shown, a detachable limit pin 5 is provided on the valve body 1, and the limit pin 5 is used to limit the maximum distance of the valve stem 2 moving out of the valve body 1, so as to prevent the valve stem 2 from escaping from the valve body 1 due to excessive displacement of the valve stem 2 out of the valve body 1, thereby causing the medium in the valve body 1 to overflow from the connecting hole 13.

[0027] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A relief valve, characterized in that: The invention comprises a valve body (1), wherein the valve body (1) is provided with a discharge port (11) and a discharge port (12), and a ball (4) for controlling the opening of the discharge port (11) is arranged at the discharge port (11); a valve stem (2) is inserted into the valve body (1), and the valve stem (2) and the valve body (1) are threadedly connected, and the valve stem (2) can be moved inward or outward of the valve body (1) by rotating the valve stem (2), so that the valve stem (2) pushes the ball (4) to control the opening size of the discharge port (11); a sealing ring (3) is arranged between the valve stem (2) and the valve body (1), and the sealing ring (3) can move in the valve body (1) along with the valve stem (2).

2. The relief valve according to claim 1, characterized in that: The valve body (1) is provided with a connecting hole (13) for the valve stem (2) to pass through, and the connecting hole (13) comprises a straight section (131) and an internal thread section (132).

3. The relief valve according to claim 2, characterized in that: The hole diameter of the straight section (131) is smaller than the outer diameter of the sealing ring (3).

4. The relief valve according to claim 1, characterized in that: The valve stem (2) is partially inserted into the valve body (1), and the front end of the valve stem (2) inserted into the valve body (1) is provided with an external thread (21); a sealing groove (22) for installing the sealing ring (3) is provided on the outer surface of the valve stem (2) adjacent to the external thread (21).

5. The relief valve according to claim 4, characterized in that: The diameter of the sealing groove (22) at the bottom is larger than the hole diameter of the sealing ring (3).

6. The relief valve according to claim 4, characterized in that: The outer surface of one end of the valve stem (2) located outside the valve body (1) is configured to be hexagonal.

7. The relief valve according to claim 4, characterized in that: A hexagonal countersunk hole is provided on an end surface of one end of the valve stem (2) located outside the valve body (1).

8. The relief valve according to claim 2, characterized in that: The valve body (1) is provided with a detachable limiting pin (5).

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