A blind valve for a gas pipeline

Abstract

The utility model provides a blind plate valve for coal gas pipeline relates to blind plate valve technical field. A blind plate valve for coal gas pipeline, blind plate valve is connected in series in coal gas pipeline, and the blind plate valve includes the valve body of being located in the coal gas pipeline and the blind plate of being movably arranged in the valve body, and both sides of the blind plate are equipped with the gasket ring, and the gasket ring is in abutment with the valve body, the gasket ring lateral wall is equipped with the asbestos layer that has been dip dyed with yellow dry oil along its circumference, still include fixed rope, and the fixed rope is along the gasket ring circumferential winding in the gasket ring lateral wall to with the asbestos layer fixed in the gasket ring lateral wall. Adopt the utility model, it can enhance the corrosion -resistant, high temperature resistant performance of gasket ring, and then enhance the sealing property of blind plate valve, prevent coal gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of blind valve technology, and more specifically, to a blind valve for gas pipelines. Background Technology

[0002] In titanium slag smelting, a large amount of high-temperature gas is generated. This gas is typically delivered to a gas holder via a gas pipeline network, undergoing cooling, dust removal, and purification before being used as fuel. For safety, blind flange valves and electric butterfly valves are usually installed on the main gas pipe to cut off gas supply in emergencies or during maintenance. However, due to the high temperature of the transported gas and the temperature variations at different times, the tightness and sealing of the blind flange valve between the blind flange and the valve body will be compromised after long-term thermal expansion and contraction. Furthermore, the gas often contains acidic gases such as hydrogen chloride and sulfur dioxide; ordinary blind flange valves can also be pitted and develop holes in acidic environments, leading to gas leaks. Utility Model Content

[0003] The purpose of this invention is to provide a blind flange valve for gas pipelines, which can enhance the corrosion resistance and high temperature resistance of the gasket ring, thereby enhancing the sealing performance of the blind flange valve and preventing gas leakage.

[0004] The technical solution adopted in this utility model is as follows:

[0005] This application provides a blind flange valve for a gas pipeline. The blind flange valve is connected in series with the gas pipeline. The blind flange valve includes a valve body disposed in the gas pipeline and a blind flange movably disposed in the valve body. Gasket rings are provided on both sides of the blind flange, and the gasket rings abut against the valve body. The side wall of the gasket ring is provided with an asbestos layer impregnated with tartaric acid along its circumference. The valve also includes a fixing rope, which is wound around the side wall of the gasket ring along its circumference to fix the asbestos layer to the side wall of the gasket ring.

[0006] Furthermore, in some embodiments of this utility model, the asbestos layer is annular and its cross-section is circular.

[0007] Furthermore, in some embodiments of this utility model, the fixing rope is hemp rope or iron wire.

[0008] Furthermore, in some embodiments of this utility model, the outer wall of the gas pipeline is provided with multiple pipeline top plates at intervals along its circumference, and the pipeline top plates are trapezoidal structures.

[0009] Furthermore, in some embodiments of this utility model, the outer wall of the gas pipeline is provided with multiple pipeline stiffeners at intervals along its circumference, and the pipeline stiffeners are triangular structures; the pipeline stiffeners correspond one-to-one with the top plate of the pipeline, the pipeline stiffeners are connected to the top plate of the pipeline, and the plane where the pipeline stiffeners are located is perpendicular to the plane where the top plate of the pipeline is located.

[0010] Furthermore, in some embodiments of this utility model, the pipe stiffener has mounting holes.

[0011] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0012] This application uses an asbestos layer impregnated with tar to be placed around the gasket ring, and then wrapped with a fixing rope made of hemp rope or iron wire, with a thickness of 5mm. This can enhance the corrosion resistance and high temperature resistance of the gasket ring, thereby enhancing the sealing performance of the blind valve and preventing gas leakage. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A front view of a blind flange valve for gas pipelines provided in an embodiment of this utility model;

[0015] Figure 2 for Figure 1 A partial sectional view of AA;

[0016] Figure 3 Left view of the blind plate and gasket ring provided in an embodiment of this utility model;

[0017] Figure 4 Left view of the gasket ring provided in an embodiment of this utility model;

[0018] Figure 5 for Figure 4 A cross-sectional view of BB.

[0019] Icons: 10-Gas pipeline; 11-Pipeline top plate; 12-Pipeline stiffening plate; 121-Mounting hole; 20-Blind valve; 21-Valve body; 22-Blind flange; 23-Gasket ring; 24-Asbestos layer; 25-Fixing rope. Detailed Implementation

[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0021] Example

[0022] Please refer to Figures 1-5This embodiment provides a blind flange valve for a gas pipeline. The blind flange valve 20 is connected in series with the gas pipeline 10. The blind flange valve 20 includes a valve body 21 disposed on the gas pipeline 10 and a blind flange 22 movably disposed on the valve body 21. The valve body 21 mainly includes structures such as flanges, nuts, and bolts, and is fixed to the gas pipeline 10 by the flanges. Gasket rings 23 are provided on both sides of the blind flange 22, and the gasket rings 23 abut against the valve body 21. An asbestos layer 24 impregnated with tar is provided along the circumference of the side wall of the gasket ring 23. A fixing rope 25 is also included, which is wound around the side wall of the gasket ring 23 to fix the asbestos layer 24 to the side wall of the gasket ring 23. Preferably, the blind flange valve of this embodiment can be made of 316L stainless steel, which is more wear-resistant and corrosion-resistant than blind flange valves made of traditional carbon steel. In this embodiment, the outer diameter of the blind flange 22, the outer diameter of the gasket ring 23, the nuts, and the bolts are determined based on the dimensions of the gas pipeline 10. The thickness is 6-10mm. For example, the blind flange for a DN900 gas pipeline 10 is 8mm thick, with an outer diameter of 920mm, and the nuts and bolts are M27×100, with 24 nuts and bolts in total. The blind flange for a DN1000 gas pipeline 10 is 10mm thick, with an outer diameter of 1020mm, and the nuts and bolts are M27×100. A DN900 flange is selected, with a flange pressure rating of PN0.5MPa.

[0023] In this embodiment, the gasket ring 23 is 25mm wide and 920mm in outer diameter, and is made of 316L stainless steel, which is more heat-resistant than rubber. An asbestos layer 24 impregnated with tar is arranged around the gasket ring 23 and wrapped with a fixing rope 25 made of hemp rope or wire, with a compression thickness of 5mm. This enhances the corrosion resistance and high-temperature resistance of the gasket ring 23, thereby improving the sealing performance of the blind valve and preventing gas leakage.

[0024] like Figures 1-5 As shown, in some embodiments, the asbestos layer 24 is annular and has a circular cross-section. This arched shape on the outward-facing side of the asbestos layer 24 facilitates the application of pressure to the asbestos layer 24 during the winding of the securing rope 25, thus better securing the asbestos layer 24.

[0025] like Figures 1-2As shown, in some embodiments, the outer wall of the gas pipeline 10 is provided with multiple pipe top plates 11 spaced apart along its circumference, and the pipe top plates 11 have a trapezoidal structure. The outer wall of the gas pipeline 10 is also provided with multiple pipe stiffeners 12 spaced apart along its circumference, and the pipe stiffeners 12 have a triangular structure. Each pipe stiffener 12 corresponds to one of the pipe top plates 11, and the pipe stiffeners 12 are connected to the pipe top plates 11. The plane of the pipe stiffener 12 is perpendicular to the plane of the pipe top plate 11, and the pipe stiffener 12 has mounting holes 121. In this embodiment, four pipe top plates 11 and four pipe stiffeners 12 are used, with a plate thickness of 12mm. During use, the pipe top plates 11 and four pipe stiffeners 12 can be fixed to supports or other objects to secure the gas pipeline 10, thereby stabilizing the gas pipeline 10 and reducing pressure at the blind valve connection.

[0026] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0027] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A blind flange valve for a gas pipeline, wherein the blind flange valve (20) is connected in series with the gas pipeline (10), the blind flange valve (20) includes a valve body (21) disposed in the gas pipeline (10) and a blind flange (22) movably disposed in the valve body (21), and both sides of the blind flange (22) are provided with gasket rings (23), the gasket rings (23) abutting against the valve body (21); characterized in that, The sidewall of the pad ring (23) is provided with an asbestos layer (24) impregnated with tartaric acid along its circumference, and also includes a fixing rope (25), which is wound around the sidewall of the pad ring (23) along its circumference to fix the asbestos layer (24) to the sidewall of the pad ring (23).

2. A blind flange valve for gas pipelines according to claim 1, characterized in that, The asbestos layer (24) is annular and has a circular cross-section.

3. A blind flange valve for gas pipelines according to claim 1, characterized in that, The fixing rope (25) is hemp rope or iron wire.

4. A blind flange valve for gas pipelines according to claim 1, characterized in that, The outer wall of the gas pipeline (10) is provided with multiple pipeline top plates (11) spaced apart along its circumference, and the pipeline top plates (11) are trapezoidal structures.

5. A blind flange valve for gas pipelines according to claim 4, characterized in that, The outer wall of the gas pipeline (10) is provided with a plurality of pipeline stiffeners (12) spaced apart along its circumference. The pipeline stiffeners (12) are triangular in structure. The pipeline stiffeners (12) correspond one-to-one with the pipeline top plate (11). The pipeline stiffeners (12) are connected to the pipeline top plate (11), and the plane of the pipeline stiffeners (12) is perpendicular to the plane of the pipeline top plate (11).

6. A blind flange valve for gas pipelines according to claim 5, characterized in that, The pipe stiffener (12) has mounting holes (121).

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