A ball valve sealing structure for a reserved port of a pressurized natural gas

Abstract

The utility model relates to the technical field of plugging structure, concretely relates to a ball valve plugging structure of natural gas reservation mouth with pressure, which comprises: a sealing plate part, comprising an inner sealing unit and an outer sealing unit respectively used for detachable installation at the inner and outer side connecting mouths of the ball valve body; the inner sealing unit and the outer sealing unit are respectively provided with an inner connecting pipe and an outer connecting pipe for installing a pressure gauge; the ball valve plugging structure of natural gas reservation mouth with pressure can detect the sealing property of the ball valve body installed at the reservation mouth through the cooperation of the inner sealing unit and the outer sealing unit, ensure the good sealing property of the valve body during installation, and simultaneously serve as a post-period plugging plate structure to improve the plugging effect in cooperation with the ball valve body; overall, the plugging structure can meet the multifunctional work requirements of maintenance and installation personnel, is simple and reliable to operate, can be improved based on the existing reservation mouth pipeline, and has a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, specifically to a sealing structure for a ball valve with a pre-reserved port for pressurized natural gas. Background Technology

[0002] Currently, gas gathering pipes in natural gas stations are equipped with reserved openings. The most common method for sealing these reserved openings is to use ball valves and sealing plates to block the ball valve outlets. This sealing structure ensures good safety of the reserved openings during operation and reduces the risk of leakage into the air.

[0003] However, when connecting to this reserved port, the sealing plate must be removed first before connecting other working equipment. But when maintenance is required, because maintenance personnel cannot determine the pressure inside the sealing space of the sealing plate, nor are they clear whether the ball valve is leaking and the amount of leakage, maintenance personnel can only determine whether there is pressurized natural gas in the sealing space by slowly opening the sealing plate. If the ball valve leakage is large, the bolts need to be tightened quickly and the flange port needs to be resealed. In some scenarios, due to flange gasket misalignment, aging and damage, it may not be able to seal effectively after opening. This process poses a high operational safety hazard and is uncertain for operators. Moreover, it is currently impossible to effectively determine whether the ball valve is leaking internally when installing the ball valve. Therefore, considering the need to improve the safety and reliability of the sealing structure, we propose a ball valve sealing structure for a reserved port for pressurized natural gas. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings mentioned in the background art and provide a sealing structure for a ball valve with a pre-reserved port for pressurized natural gas.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A sealing structure for a pressurized natural gas pre-reserved port ball valve includes: The sealing plate includes an inner sealing unit and an outer sealing unit, which are respectively used for detachable installation at the connection ports inside and outside the ball valve body; The inner and outer packaging units are respectively provided with inner and outer connecting pipes for installing pressure gauges.

[0006] Preferably, the inner encapsulation unit includes an inner sealing flange that is detachably installed at the inner connection port of the ball valve body, and the inner connecting pipe corresponds to the position of the inner connection port of the ball valve body; The outer end of the inner pipe is fixedly connected to a first pressure gauge valve flange for detachable installation of the pressure gauge.

[0007] Preferably, the outer packaging unit includes an outer sealing plate flange that is detachably installed at the connection port on the outside of the ball valve body, and an outer cover for communicating with the connection port on the outside of the ball valve body is fixedly connected to the outer sealing plate flange.

[0008] Preferably, the outer pipe is conductively connected to the outer cover, and the outer end of the outer pipe is fixedly connected to a second pressure gauge valve flange for detachable installation of the pressure gauge.

[0009] Preferably, rubber sealing gaskets are provided at the connection surfaces of the inner sealing plate flange, the outer sealing plate flange, and the ball valve body.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This pressurized natural gas pre-reserved port ball valve sealing structure, through the cooperation of an inner and outer sealing unit, can detect the sealing performance of the ball valve body installed at the pre-reserved port, ensuring good valve body sealing during installation. It also serves as a subsequent sealing plate structure, working in conjunction with the ball valve body to improve the sealing effect. Overall, this sealing structure meets the multi-functional work needs of maintenance and installation personnel, is simple and reliable to operate, can be improved based on existing pre-reserved port pipelines, and has a wide range of applications. Attached Figure Description

[0011] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is an installation diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the outer packaging unit of this utility model; Figure 3 This is a schematic diagram of the inner packaging unit of this utility model.

[0012] The meanings of the labels in the diagram are as follows: 1. Inner sealing plate flange; 11. Inner connecting pipe; 12. First pressure gauge valve flange; 2. Outer sealing plate flange; 3. Outer cover; 4. Outer connecting pipe; 41. Second pressure gauge valve flange; 5. Ball valve body. Detailed Implementation

[0013] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Please see Figures 1-3 The present invention will describe the above technical solution in detail through the following embodiments: Example 1 In this embodiment, the ball valve sealing structure for the pre-reserved port of pressurized natural gas, when testing the airtightness of the ball valve body 5 installed at the pre-reserved port, if... Figure 1 The installation diagram shown illustrates that the inner and outer encapsulation units are installed at the inner and outer connection ports of the ball valve body 5, respectively.

[0015] When the inner and outer encapsulation units are used together as a sealing plate, they are used to detect whether there is internal leakage in the ball valve body 5; for example... Figure 2 and Figure 3 The structure shown includes an inner sealing flange 1 that is detachably installed at the connection port inside the ball valve body 5, and a first pressure gauge valve flange 12 for detachable installation of a pressure gauge is fixedly connected to the outer end of the inner pipe 11. Meanwhile, the outer sealing unit includes an outer sealing flange 2 that is detachably installed at the connection port outside the ball valve body 5, and an outer cover 3 is fixedly connected to the outside of the outer sealing flange 2. An outer pipe 4 is conductively connected to the outer cover 3, and a pressure gauge can be detachably installed at the outer end of the outer pipe 4 through a second pressure gauge valve flange 41.

[0016] That is, when testing for internal leakage of the ball valve body 5, a pressure gauge can be installed on one side, and nitrogen gas for testing can be input into the inner pipe 11 or the outer pipe 4 on the other side. The change in the pressure gauge value on the corresponding other side can be observed to determine the sealing performance of the valve.

[0017] Example 2 Only after the airtightness of the ball valve body 5 has been verified can it be installed at the reserved opening of the natural gas pipeline, and the outermost part should be installed as shown in the picture. Figure 1 and Figure 2 The outer encapsulation unit shown can be disassembled from the ball valve body 5 when the reserved opening needs to be opened later. However, it is necessary to note that the pressure gauge installed at the second pressure gauge valve flange 41 can be used to determine whether there is internal leakage between the ball valve body 5 and the outer encapsulation unit. This is to facilitate the judgment of the operational safety factor and ensure the safety of the staff. In other embodiments, an inner packaging unit can be used instead of an outer packaging unit. However, the difference is that the outer cover 3 of the outer packaging unit can form a cavity for the leaking gas, which allows the pressure gauge to monitor the internal pressure more stably and is conducive to further accurate judgment of the internal leakage.

[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A sealing structure for a ball valve with a pre-reserved port for pressurized natural gas, characterized in that: include: The sealing plate includes an inner sealing unit and an outer sealing unit, which are respectively used for detachable installation at the inner and outer connection ports of the ball valve body (5); The inner and outer packaging units are respectively provided with an inner pipe (11) and an outer pipe (4) for installing pressure gauges.

2. The sealing structure for the pre-reserved outlet ball valve for pressurized natural gas as described in claim 1, characterized in that: The inner sealing unit includes an inner sealing plate flange (1) that can be detachably installed at the inner connection port of the ball valve body (5), and the inner pipe (11) corresponds to the position of the inner connection port of the ball valve body (5). The outer end of the inner pipe (11) is fixedly connected to a first pressure gauge valve flange (12) for detachable installation of the pressure gauge.

3. The sealing structure for the pre-reserved outlet ball valve for pressurized natural gas as described in claim 2, characterized in that: The outer encapsulation unit includes an outer sealing plate flange (2) that can be detachably installed at the outer connection port of the ball valve body (5). The outer sealing plate flange (2) is fixedly connected to an outer cover (3) for communicating with the outer connection port of the ball valve body (5).

4. The sealing structure for the pre-reserved outlet ball valve for pressurized natural gas as described in claim 3, characterized in that: The outer pipe (4) is conductively connected to the outer cover (3), and the outer end of the outer pipe (4) is fixedly connected to a second pressure gauge valve flange (41) for detachable installation of the pressure gauge.

5. The sealing structure for the pre-reserved outlet ball valve of pressurized natural gas as described in claim 3, characterized in that: Rubber sealing gaskets are provided at the connection surfaces of the inner sealing plate flange (1), the outer sealing plate flange (2), and the ball valve body (5).

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