High-pressure straight-through check valve

Abstract

The utility model discloses a high-pressure straight-through check valve which comprises an inlet valve body and an outlet valve body, the inlet valve body and the outlet valve body are connected through threads, both the inlet valve body and the outlet valve body are hollow cavities and are communicated with each other, a valve disc is arranged in the inlet valve body, and a spring seat is arranged in the outlet valve body. And the tail part of the valve disc penetrates through the spring seat and is connected with the spring seat. Due to the fact that conical sealing is adopted, erosion of high-pressure media to a sealing pair is reduced, and the pressure grade of application of the straight-through check valve is improved. On the basis, the sealing type is not limited to a conical shape, and a spherical surface type or a plane type can also be applied according to the pressure grade.

Description

Technical Field

[0001] The utility model relates to the technical field of fire protection, in particular to a high-pressure straight-through check valve. Background Art

[0002] A check valve is a valve that prevents reverse flow of media. During installation, the valve disc must be kept vertical. Commonly used straight-through check valves have lower pressure ratings and larger dimensions in the vertical direction of the inlet and outlet, limiting their application.

[0003] Given the limited installation space of ship piping systems and the increased pressure levels of some piping systems, higher requirements are placed on the size and performance of corresponding pipeline valves. The currently used marine straight-through check valves cannot meet the requirements of small structural size, light weight, installation at any angle, and easy maintenance. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a high-pressure straight-through check valve.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solution: a high-pressure straight-through check valve, including an inlet valve body and an outlet valve body, the inlet valve body and the outlet valve body are connected by threads, the inlet valve body and the outlet valve body are both hollow bodies and the two are connected, a valve disc is provided in the inlet valve body, and a spring seat is provided in the outlet valve body, and the tail of the valve disc passes through the spring seat and is connected to the spring seat.

[0006] Preferably, the valve disc is of a "T-shaped" structure, with both sides of the valve disc head being conical inclined surfaces, forming a conical surface seal with the inlet valve body 1 .

[0007] Preferably, an O-ring is provided between the inlet valve body and the outlet valve body, and the two are sealed by the O-ring.

[0008] Preferably, a spring is sleeved on the outside of the valve disc, and the diameter of the spring is smaller than the length of the head of the valve disc and the length of the spring seat.

[0009] Preferably, guide holes are symmetrically provided at both ends of the spring seat.

[0010] Compared with the existing technology, the present invention has the following advantages: the use of a conical seal reduces erosion of the seal pair by high-pressure media, thereby increasing the pressure rating of the straight-through check valve. Furthermore, the seal type is not limited to a conical shape; spherical or flat seals can also be used depending on the pressure rating.

[0011] Due to the use of a valve disc-spring-spring seat structure, the tail of the valve disc passes through the spring seat to form a guide, thereby achieving any angle installation requirement of the check valve.

[0012] The use of a diversion hole design effectively reduces the size of the check valve cavity while ensuring the flow area, thereby achieving the requirements of miniaturization and lightweighting of the check valve. The diversion holes of the check valve are symmetrically arranged, and their shape, number and size are determined according to the flow requirements of the check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Markings in the figure: 1. Inlet valve body; 2. Valve disc; 3. Spring; 4. O-ring; 5. Spring seat; 6. Outlet valve body DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0016] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0017] Example 1

[0018] like Figure 1 As shown, the high-pressure straight-through check valve proposed by the present invention includes an inlet valve body 1 and an outlet valve body 6, which are connected by threads. The inlet valve body 1 and the outlet valve body 6 are both hollow and communicate with each other. A valve disc 2 is provided in the inlet valve body 1, and a spring seat 5 is provided in the outlet valve body 6. The tail of the valve disc 2 passes through the spring seat 5 and is connected to the spring seat 3. During installation, the tail of the valve disc 2 passes through the spring seat 5, forming a guide to ensure accurate positioning between the head of the valve disc 2 and the inlet valve body 1, allowing the check valve to be installed at any angle.

[0019] In this embodiment, the valve disc 2 has a T-shaped structure. The two sides of the valve disc 2's head have tapered slopes, forming a conical seal with the inlet valve body 11. This effectively reduces erosion of the seal pair by high-pressure media and improves the pressure rating of the through-check valve. Furthermore, the sealing type is not limited to a conical shape; spherical or flat surfaces can also be used depending on the pressure rating.

[0020] In this embodiment, an O-ring 4 is provided between the inlet valve body 1 and the outlet valve body 6 , and the two are sealed by the O-ring 4 .

[0021] In this embodiment, a spring 3 is sleeved on the exterior of the valve disc 2 . The diameter of the spring 3 is smaller than the length of the head of the valve disc 2 and the length of the spring seat 5 .

[0022] In this embodiment, guide holes 7 are symmetrically opened at both ends of the spring seat 5. The guide holes 7 are symmetrically arranged, and their shape, number and size are determined according to the flow requirements of the check valve.

[0023] During actual use, when the pipeline medium flows downstream, the pressure generated by the medium passes through the valve disc 2, pushing the compression spring 3 to move toward the outlet direction, the sealing surface of the inlet valve body 1 and the valve disc 2 opens, the check valve opens, and the medium flows through the guide hole of the spring seat 5.

[0024] The above embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the patent and scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A high-pressure straight-through check valve, characterized by: The invention comprises an inlet valve body (1) and an outlet valve body (6), wherein the inlet valve body (1) and the outlet valve body (6) are connected to each other by threads, the inlet valve body (1) and the outlet valve body (6) are both hollow cavities and are in communication with each other, a valve disc (2) is provided in the inlet valve body (1), a spring seat (5) is provided in the outlet valve body (6), and the tail of the valve disc (2) passes through the spring seat (5) and is connected to the spring (3) seat.

2. A high-pressure straight-through check valve according to claim 1, characterized in that: The valve disc (2) is a "T-shaped" structure, and both sides of the head of the valve disc (2) are conical inclined surfaces, forming a conical surface seal with the inlet valve body (1) 1.

3. A high-pressure straight-through check valve according to claim 2, characterized in that: An O-ring (4) is provided between the inlet valve body (1) and the outlet valve body (6), and the two are sealed by the O-ring (4).

4. A high-pressure straight-through check valve according to claim 2, characterized in that: The outer sleeve of the valve disc (2) is provided with a spring (3), the diameter of the spring (3) being smaller than the length of the head of the valve disc (2) and the length of the spring seat (5).

5. A high-pressure straight-through check valve according to claim 1, characterized in that: Diversion holes (7) are symmetrically provided at both ends of the spring seat (5).

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