Novel water pressure test plug valve structure

Abstract

The utility model relates to a novel hydraulic test plug valve structure, and belongs to the technical field of structures. The structure is mainly composed of a blocking plate, an O-shaped ring, a hexagon head bolt, a flow guide sleeve assembly, a pressing plate and a set screw. During a water pressure test, the plug plate, the O-shaped ring and the hexagon head bolt are assembled and then installed in the valve body to complete sealing, after the water pressure test is finished, the plug plate is lifted out, the flow guide sleeve assembly, the pressing plate and the set screw are installed, and normal work can be achieved. According to the utility model, the safety is improved, better adaptability is provided, and adjustment can be carried out according to different pressure levels and application scenes. The material cost is saved, the weight of the whole valve is reduced, and installation and maintenance are more convenient.

Description

Technical Field

[0001] The utility model relates to a novel structure of a hydrostatic test plug valve, belonging to the technical field of structures. Background Art

[0002] In modern industrial systems, hydrostatic testing is an important link to ensure the safe operation of pipelines, valves and other pressure vessels. The hydrostatic test plug valve plays an indispensable role in the hydrostatic test of operating pipelines.

[0003] When discussing this design, we first need to understand the working principle of the hydrostatic test plug valve. The plug valve acts as a closure for the pipeline during hydrostatic testing. In traditional hydrostatic test plug valve designs, a support plate is often used in combination with a plug plate to replace the guide sleeve to achieve a sealing effect and close the pipeline, so as to facilitate the detection of the sealing performance and pressure resistance of the on-site pipeline. The traditional plug plate design relies on a thick support plate to withstand the pressure from the test medium, ensuring that the plug valve will not fail due to excessive pressure. However, this design often makes the middle cavity of the valve body larger, consumes more materials, and also makes the guide sleeve longer and difficult to machine.

[0004] To solve the above problems, an innovative design is proposed. In this design, the method of installing bolts on the back of the plug plate is used to replace the original support plate, so as to save space and materials while ensuring the safety of the equipment. Through actual test verification, the effect is good, and the improved structure can meet the use requirements. Summary of the Invention

[0005] The novel hydrostatic test plug valve structure described in the utility model gives a brief overview of the utility model below to provide a basic understanding of certain aspects of the utility model. It should be understood that this overview is not an exhaustive overview of the utility model. It is not intended to identify the key or important parts of the utility model, nor is it intended to limit the scope of the utility model.

[0006] The technical solution of the utility model is as follows: It mainly consists of a plug plate (2), an O-ring (3), a hexagon head bolt (4), a guide sleeve assembly (6), a pressing plate (7), and a set screw (8).

[0007] During hydrostatic testing, after assembling the plug plate (2), the O-ring (3), and the hexagon head bolt (4), they are installed into the valve body to complete the sealing. After the hydrostatic test is over, the plug plate is lifted out, and the guide sleeve assembly (6), the pressing plate (7), and the set screw (8) are installed to work normally.

[0008] Preferably: The connection between the hexagon head bolt and the plug plate is adjustable.

[0009] Preferably: After the pressing plate and the guide sleeve assembly are assembled, they are firmly welded.

[0010] Preferably, the quantity and positions of the hexagon head bolts need to be calculated.

[0011] The utility model has the following beneficial effects: 1. Compared with the support plate and screw rod of the traditional structure, the middle cavity space is greatly reduced. 2. Replacing the screw rod of the traditional structure with multiple high-strength hexagon head bolts obtained by calculation improves safety and at the same time provides better adaptability, and can be adjusted according to different pressure grades and application scenarios. 3. The heavy support plate is omitted, greatly saving the material cost and at the same time reducing the weight of the overall valve, making installation and maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings are schematic diagrams, Figure 1 which are the structures during the hydrostatic test of the hydrostatic test blanking valve; Figure 2 which are the structures when the hydrostatic test blanking valve is working normally

[0013] In the figures, 1 is the valve body; 2 is the blanking plate; 3 is the O-ring; 4 is the hexagon head bolt; 5 is the lifting ring;

[0014] 6 is the flow guiding sleeve assembly; 7 is the pressing plate; 8 is the set screw; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] To make the purpose, technical solutions and advantages of the utility model clearer and more understandable, the utility model will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and do not limit the scope of the utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the utility model.

[0016] The utility model is divided into a test state and a working state. During the hydrostatic test, the blanking plate (2), O-ring (3), hexagon head bolt (4), and lifting ring (5) need to be pre-assembled together. The blanking plate (2) is loaded into the valve body by hoisting. After fixing, the screwing-out length of the hexagon head bolt (4) is adjusted to press the O-ring (3) tightly to achieve the sealing effect. The lifting ring (5) is removed for the hydrostatic test. After the hydrostatic test is completed, the lifting ring (5) is installed, the blanking plate (2) is lifted out, and the flow guiding sleeve assembly (6), pressing plate (7), and set screw (8) are installed. The set screw (8) fixes one end of the pressing plate (7) on the valve body (1). After the position of the flow guiding sleeve assembly (6) is adjusted, the other end of the pressing plate (7) is spot-welded to the flow guiding sleeve assembly (6) to ensure the connection between the hydrostatic test blanking valve and the pipeline.

[0017] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new type of hydrostatic test plug valve structure, characterized in that: Valve body (1), blanking plate (2), O-ring (3), hexagon head bolt (4), lifting ring (5), flow guiding sleeve assembly (6), pressing plate (7) and set screw (8). The O-ring (3) is installed on the A surface of the blanking plate (2), the hexagon head bolt (4) is installed on the B surface of the blanking plate (2), the lifting ring (5) is screwed tightly directly above the blanking plate (2), the blanking plate (2) is assembled to the valve body (1) to complete the sealing. After the sealing test is completed, the blanking plate (2) is lifted out, and the flow guiding sleeve assembly (6), pressing plate (7) and set screw (8) are installed, then it can work normally.

2. The novel hydraulic test plug valve structure according to claim 1, characterized in that: The mating length between the blanking plate (2) and the hexagon head bolt (4) is adjustable.

3. A novel hydraulic test plug valve structure according to claim 1, characterized in that: The O-ring (3) can complete the sealing by being pressed tightly through adjusting the mating length between the blanking plate (2) and the hexagon head bolt (4).

4. A novel hydraulic test plug valve structure according to claim 1, characterized in that: The size of the middle cavity of the valve body (1) can be effectively reduced compared with the traditional hydrostatic test blanking valve.

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