On-off control device for overhauling gas pipeline

Abstract

The utility model belongs to the technical field of gas pipeline maintenance, and relates to an on-off control device for gas pipeline maintenance. Comprising a front flange (1), a rear flange (2), a blind plate (3) and a blind ring (4), the blind ring (4) is located between the front flange (1) and the rear flange (2), and a positioning table (5) is arranged on the edge of an inner ring on one side of the blind ring (4). The front flange (1) is connected with a front pipeline, and the rear flange (2) is connected with a rear pipeline. According to the on-off control device for overhauling the gas pipeline, the blind plate and the blind ring can be conveniently and reliably arranged, the on-off requirement of the gas pipeline can be conveniently met, the blind ring is reliable in sealing, the blind plate is convenient to mount and dismount, and the use reliability and overhauling convenience of the gas pipeline are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas pipeline maintenance, and more specifically relates to an on-off control device for gas pipeline maintenance. Background Art

[0002] In order to reliably cut off the gas source during the maintenance of gas facilities, a blind plate (gas blind plate) is required as a device to reliably cut off the gas source. After the maintenance, the blind plate needs to be replaced with a blind plate ring. Existing blind plates and blind rings (blind plate rings) are mostly sealed with ash medium ropes. After the blind plate is inserted into the pipeline, the ash medium rope is wrapped around the edge of the blind plate, or a rubber sealing strip is installed in the blind plate for sealing, and then the flange screws are tightened. This sealing method has the following problems: it takes a long time to wrap the ash medium rope, and it needs to be operated during installation, resulting in a long installation time for the blind plate; the use of ash medium rope sealing requires a high level of blind plate workmanship. If the winding is improper, it will cause leakage, which requires rework and is time-consuming and laborious; most of the blind plate installations are in the already installed gas pipelines, with small gaps, and are operated at high altitudes, and the installation position is limited. The installation of blind plates and blind plate rings mostly requires hoisting. The current blind plate sealing strips and blind plate installation positioning are more troublesome, resulting in complex installation of blind plates and blind plate rings, which is time-consuming. Therefore, the prior art results in inconvenience in gas maintenance operations.

[0003] In the prior art, there is a technology named "blind plate valve for blast furnace gas pipeline" and the publication number is "CN107893861A", which discloses a blind plate valve for blast furnace gas pipeline, including: a valve body with a valve plate installed, and a bellows compensator connected to the valve front inlet of the valve body, the bellows compensator includes a rear end pipe for connecting with the valve front inlet of the valve body, a front end pipe for connecting with the blast furnace gas pipeline, and a metal bellows connected between the rear end pipe and the front end pipe, a guide sleeve is sleeved inside the bellows compensator, the front end of the guide sleeve extends forward into the front end pipe and is sealed and fixed with the inner wall of the front end pipe, the rear end of the guide sleeve extends backward into the rear end pipe and is not fixed with the rear end pipe, and a sealing mechanism is provided between the guide sleeve and the rear end pipe, which can seal the gap between the two and does not hinder the relative sliding of the two; the inner wall of the rear end pipe of the bellows compensator, the inner wall of the front end pipe, the inner wall of the guide sleeve, the inner wall of the valve body, and the outer wall of the valve plate are all coated with an anti-corrosion and wear-resistant layer. The invention has the advantages of long service life and good anti-corrosion and wear-resistant effect. However, the technology does not involve the technical problem and technical solution of the present application. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a gas pipeline maintenance on-off control device is provided which has a simple structure, can conveniently and reliably realize the arrangement of blind plates and blind rings, conveniently and reliably realize the on-off requirements of the gas pipeline, has reliable blind ring sealing, is convenient to install and disassemble the blind plates, and improves the reliability of gas pipeline use and the convenience of maintenance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the utility model is:

[0006] The utility model is an on-off control device for gas pipeline maintenance, comprising a front flange, a rear flange, a blind plate and a blind ring. The blind ring is located between the front flange and the rear flange, and a positioning platform is arranged on the inner edge of one side of the blind ring.

[0007] The positioning platform is an annular structure arranged along the inner circle of one side of the blind ring.

[0008] The front flange is connected to the front pipeline, and the rear flange is connected to the rear pipeline.

[0009] A positioning hole is arranged on the front flange, and a positioning pin is arranged on the blind ring.

[0010] The front flange, rear flange and blind ring are respectively provided with bolt holes, and the bolts are arranged to pass through the corresponding bolt holes on the front flange, rear flange and blind ring to fix the front flange, rear flange and blind ring.

[0011] An annular sealing strip groove is arranged on the blind ring.

[0012] The sealing strip slot is provided with a structure capable of clamping the sealing strip, and the sealing strip is provided with a structure whose thickness dimension is greater than the depth dimension of the sealing strip slot.

[0013] A positioning portion is arranged on the edge of the rear flange.

[0014] The front flange, rear flange, blind plate and blind ring are all structures made of metal materials.

[0015] The technical solution of the utility model is adopted, and the working principle and beneficial effects are as follows:

[0016] The on-off control device for gas pipeline maintenance described in the utility model is structured to respectively make a front flange, a rear flange, a blind plate, and a blind ring. The front flange is an annular structure, the rear flange is an annular structure, the blind plate is a circular structure, and the blind ring is an annular structure. One side of the front flange is connected to the front pipeline, and one side of the rear flange is connected to the rear pipeline, and the blind ring is located between the other side of the front flange and the other side of the rear flange. And the front flange, the rear flange, and the blind ring are fixedly connected by bolts. When the gas pipeline is working normally, the blind plate is not installed, and the front pipeline and the rear pipeline are in a connected state, meeting the normal gas transportation requirements. When the gas pipeline needs to be repaired, the bolts are loosened, the blind ring is first removed, and then the blind plate is clamped on the positioning table of the blind ring, and then the blind ring is arranged between the front flange and the rear flange, and then the front flange, the rear flange, and the blind ring are connected by bolts. At this time, the blind plate plays the role of disconnecting the front pipeline and the rear pipeline, and the gas cannot be transported between the front pipeline and the rear pipeline, which is convenient for the maintenance of the corresponding pipeline to which the gas has not been transported. In this way, the normal transportation of gas can be realized conveniently and reliably, and the demand for gas disconnection during pipeline maintenance can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 This is a schematic structural diagram of the front flange of the on-off control device for gas pipeline maintenance according to the utility model;

[0019] Figure 2 This is a structural schematic diagram of the rear flange of the on-off control device for gas pipeline maintenance according to the utility model;

[0020] Figure 3 This is a structural schematic diagram of a blind ring of the on-off control device for gas pipeline maintenance according to the utility model;

[0021] Figure 4 It is a structural schematic diagram of the blind ring and the blind plate of the on-off control device for gas pipeline maintenance described in the utility model when they are matched;

[0022] The markings in the attached drawings are: 1, front flange; 2, rear flange; 3, blind plate; 4, blind ring; 5, positioning platform; 6, positioning hole; 7, positioning pin; 8, lifting ring; 9, sealing strip slot; 10, positioning part; 11, bolt hole. DETAILED DESCRIPTION

[0023] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connection relationships of the components involved, the functions and working principles of the components, etc., by referring to the accompanying drawings:

[0024] As attached Figure 1 -Attached Figure 4 As shown, the utility model is a gas pipeline maintenance on-off control device, including a front flange 1, a rear flange 2, a blind plate 3, and a blind ring 4. The blind ring 4 is located between the front flange 1 and the rear flange 2, and a positioning platform 5 is arranged on the inner edge of one side of the blind ring 4. The front flange 1 is connected to the front pipeline, and the rear flange 2 is connected to the rear pipeline. The above structure proposes an improved technical solution for the deficiencies in the prior art. When the structure is set, the front flange 1, the rear flange 2, the blind plate 3, and the blind ring 4 are respectively made. The front flange 1 is an annular structure, the rear flange 2 is an annular structure, the blind plate 3 is a circular structure, and the blind ring 4 is an annular structure. One side of the front flange 1 is connected to the front pipeline, and one side of the rear flange 2 is connected to the rear pipeline, and the blind ring 4 is located between the other side of the front flange 1 and the other side of the rear flange 2. And the front flange 1, the rear flange 2, and the blind ring 4 are fixedly connected by bolts. When the gas pipeline is working normally, the blind plate 3 is not installed, and the front pipeline and the rear pipeline are in a connected state, meeting the normal gas transportation needs. When the gas pipeline needs to be repaired, the bolts are loosened, the blind ring 4 is removed first, and then the blind plate 3 is clamped on the positioning platform 5 of the blind ring 4, and then the blind ring 4 is rearranged between the front flange 1 and the rear flange 2, and then the front flange 1, the rear flange 2, and the blind ring 4 are fixedly connected by bolts. At this time, the blind plate 3 plays the role of disconnecting the front pipeline and the rear pipeline, and the gas cannot be transported between the front pipeline and the rear pipeline, which is convenient for the maintenance of the corresponding pipeline to which the gas has not been transported. In this way, the normal transportation of gas can be conveniently and reliably realized when the pipeline is working normally, and the demand for gas disconnection during pipeline maintenance can be met. The on-off control device for gas pipeline maintenance described in the utility model has a simple structure, can conveniently and reliably realize the arrangement of blind plates and blind rings, conveniently and reliably realize the on-off demand of the gas pipeline, the blind ring is reliably sealed, and the blind plate is easy to install and disassemble, thereby improving the reliability of the use of the gas pipeline and the convenience of maintenance.

[0025] The positioning platform 5 is an annular structure arranged along the inner circle of one side of the blind ring 4. In the above structure, the positioning platform 5 is an annular step structure, which is convenient for reliably clamping the blind plate 3 when the blind plate 3 is needed.

[0026] The front flange 1 is provided with a positioning hole 6, and the blind ring 4 is provided with a positioning pin 7. In the above structure, the number and position of the positioning holes and the positioning pins correspond to each other, which is convenient for reliable positioning between the blind ring and the front flange. The front pipeline and the rear pipeline are flexible structures. When installing or removing the blind ring and the blind plate, the distance between the front flange and the rear flange can be adjusted, which is convenient for reliable meeting the installation and removal requirements.

[0027] The front flange 1, the rear flange 2, and the blind ring 4 are respectively provided with bolt holes 11, and the bolts are provided so as to be able to pass through the corresponding bolt holes on the front flange 1, the rear flange 2, and the blind ring 4 to fix the front flange 1, the rear flange 2, and the blind ring 4. With the above structure, when the front flange 1, the rear flange 2, and the blind ring 4 are reliably connected, they are reliably sealed and meet the normal gas transportation requirements.

[0028] The blind ring 4 is provided with an annular sealing strip groove 9. The sealing strip groove 9 is provided with a structure capable of clamping the sealing strip, and the sealing strip is provided with a structure with a thickness dimension greater than a depth dimension of the sealing strip groove 9. With the above structure, the sealing strip can reliably improve the sealing performance. The sealing strip grooves 9 can be provided on both sides of the blind ring 4, respectively, so as to facilitate clamping the sealing strip, thereby satisfying the sealing between the blind ring 4 and the front flange 1, and also satisfying the sealing between the blind ring 4 and the rear flange 2.

[0029] The edge of the rear flange 2 is provided with a positioning portion 10. In the above structure, the positioning portion 10 is an L-shaped structure, and the blind ring is clamped from the outer ring to achieve reliable positioning between the blind ring 4 and the rear flange 2.

[0030] The front flange 1, the rear flange 2, the blind plate 3 and the blind ring 4 are all structures made of metal materials. The above structure and the above components have good strength and can be used for a long time and can be reused.

[0031] The on-off control device for gas pipeline maintenance described in the utility model is structured by making a front flange 1, a rear flange 2, a blind plate 3, and a blind ring 4 respectively. The front flange 1 is an annular structure, the rear flange 2 is an annular structure, the blind plate 3 is a circular structure, and the blind ring 4 is an annular structure. One side of the front flange 1 is connected to the front pipeline, one side of the rear flange 2 is connected to the rear pipeline, and the blind ring 4 is located between the other side of the front flange 1 and the other side of the rear flange 2. And the front flange 1, the rear flange 2, and the blind ring 4 are fixedly connected by bolts. When the gas pipeline is working normally, the blind plate 3 is not installed, and the front pipeline and the rear pipeline are in a connected state, meeting the normal gas transportation needs. When the gas pipeline needs to be inspected, the bolts are loosened, the blind ring 4 is removed first, and then the blind plate 3 is clamped on the positioning platform 5 of the blind ring 4, and then the blind ring 4 is rearranged between the front flange 1 and the rear flange 2, and then the front flange 1, the rear flange 2, and the blind ring 4 are fixedly connected by bolts. At this time, the blind plate 3 plays the role of disconnecting the front pipeline and the rear pipeline, and the gas cannot be transported between the front pipeline and the rear pipeline, which is convenient for the inspection of the corresponding pipeline to which the gas is not transported. In this way, when the pipeline is working normally, it is convenient and reliable to realize the normal transportation of gas, and meet the demand for gas disconnection during pipeline inspection.

[0032] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An on-off control device for gas pipeline maintenance, characterized in that: It comprises a front flange (1), a rear flange (2), a blind plate (3), and a blind ring (4), wherein the blind ring (4) is located between the front flange (1) and the rear flange (2), and a positioning platform (5) is arranged on the inner edge of one side of the blind ring (4); The positioning platform (5) is an annular structure arranged along the inner ring of one side of the blind ring (4); When it is necessary to inspect the gas pipeline, the positioning platform (5) of the blind ring (4) is configured to have a structure capable of clamping the blind plate (3), the blind ring (4) is arranged between the front flange (1) and the rear flange (2), the front flange (1), the rear flange (2) and the blind ring (4) are fixedly connected by bolts, and the blind plate (3) is configured to have a structure capable of disconnecting the front pipeline and the rear pipeline.

2. The on-off control device for gas pipeline maintenance according to claim 1, characterized in that: The front flange (1) is connected to the front pipeline, and the rear flange (2) is connected to the rear pipeline.

3. The on-off control device for gas pipeline maintenance according to claim 1 or 2, characterized in that: The front flange (1) is provided with a positioning hole (6), and the blind ring (4) is provided with a positioning pin (7).

4. The on-off control device for gas pipeline maintenance according to claim 1 or 2, characterized in that: The front flange (1), the rear flange (2) and the blind ring (4) are respectively provided with bolt holes, and the bolts are arranged to pass through the corresponding bolt holes on the front flange (1), the rear flange (2) and the blind ring (4) to fix the front flange (1), the rear flange (2) and the blind ring (4) to form a structure.

5. The on-off control device for gas pipeline maintenance according to claim 1 or 2, characterized in that: An annular sealing strip groove (9) is provided on the blind ring (4).

6. The on-off control device for gas pipeline maintenance according to claim 5, characterized in that: The sealing strip clamping groove (9) is provided with a structure capable of clamping the sealing strip, and the sealing strip is provided with a structure having a thickness dimension greater than a depth dimension of the sealing strip clamping groove (9).

7. The on-off control device for gas pipeline maintenance according to claim 1 or 2, characterized in that: A positioning portion (10) is provided on the edge of the rear flange (2).

8. The on-off control device for gas pipeline maintenance according to claim 1 or 2, characterized in that: The front flange (1), the rear flange (2), the blind plate (3) and the blind ring (4) are all structures made of metal materials.

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