Emergency cut-off valve for leakage of natural gas pipeline

Abstract

The utility model discloses a natural gas pipeline leakage emergency cut-off valve which comprises a natural gas valve, a switch rod is installed on the top of the natural gas valve, an external thread ring is welded to the top of the natural gas valve, a cover cap is arranged on the top of the natural gas valve, internal threads are formed in the cover cap, and the cover cap is connected with the external thread ring through the internal threads. And the switch lever is positioned in the cap. According to the natural gas pipeline leakage emergency cut-off valve, a switch rod is installed at the top of a natural gas valve, an external thread ring is welded to the top of the natural gas valve, a cap is arranged at the top of the natural gas valve, internal threads are formed in the cap, the cap is installed on the external thread ring through the internal threads, and at the moment, the switch rod is located in the cap; when the emergency cut-off valve for natural gas pipeline leakage is used, the cover cap can be used for hiding the switch rod, so that the cover cap cannot be exposed outside, the switch rod cannot be touched by mistake at the moment, and the emergency cut-off valve is very convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas pipeline valves, in particular to an emergency cut-off valve for leakage of a natural gas pipeline. Background Art

[0002] The natural gas pipeline leakage emergency shut-off valve is a safety device in the natural gas pipeline connection. When the instrument detects a combustible gas leak, it automatically and quickly closes the main gas supply valve, cuts off the gas supply, and promptly stops the occurrence of serious accidents.

[0003] The natural gas pipeline leakage emergency shut-off valve currently available on the market has the following problems in actual use:

[0004] 1. When the traditional natural gas pipeline leakage emergency shut-off valve is actually used, the switch rod on the natural gas pipeline leakage emergency shut-off valve is completely exposed to the outside. At this time, when using the natural gas pipeline leakage emergency shut-off valve, the switch rod may be touched, thereby affecting the operation of the natural gas pipeline leakage emergency shut-off valve, which is inconvenient to use;

[0005] 2. During the use of most natural gas pipeline leakage emergency shut-off valves, since they need to be fixed by flanges when installed on natural gas pipelines, when the flanges are used to fix each other, they need to be manually aligned with each other. At this time, the position of the flanges needs to be adjusted back and forth, which is troublesome to use. Utility Model Content

[0006] The utility model aims to provide an emergency shut-off valve for natural gas pipeline leakage, so as to solve the technical problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a natural gas pipeline leakage emergency shut-off valve, comprising a natural gas valve, a switch rod is installed on the top of the natural gas valve, an external threaded ring is welded on the top of the natural gas valve, a cap is provided on the top of the natural gas valve, an internal thread is provided inside the cap, the cap is connected to the external threaded ring through the internal thread, and the switch rod is located inside the cap.

[0008] Preferably, the surface of the natural gas valve is fixedly connected to a connecting pipe, a flange is welded to the other end of the connecting pipe, a baffle is welded to the surface of the flange, an externally threaded rod is welded to the side of the baffle, the externally threaded rod passes through a positioning plate, a nut is installed on the surface of the externally threaded rod, the nut is located on the side of the positioning plate, a positioning ring is fixedly connected to the side of the positioning plate, and the flange is located inside the positioning ring.

[0009] Preferably, a control device is mounted on the surface of the natural gas valve, a magnet sheet is bonded to the top of the control device, the top of the magnet sheet is attached to an iron sheet, and a cap is welded to the top of the iron sheet.

[0010] Preferably, a fixing ring is welded on the bottom of the control device, the magnet sheet is located inside the fixing ring, and the iron sheet is embedded in the fixing ring.

[0011] Preferably, a sealing ring is bonded inside the flange, and the sealing ring is located at one end of the connecting pipe.

[0012] Preferably, an anti-sliding block is welded on the surface of the cap, and the anti-sliding block is distributed in a ring shape.

[0013] The natural gas pipeline leakage emergency cut-off valve of the utility model has the following advantages:

[0014] 1. The natural gas pipeline leakage emergency shut-off valve is provided with a switch rod installed on the top of the natural gas valve, and an external thread ring is welded on the top of the natural gas valve. A cap is provided on the top of the natural gas valve, and an internal thread is provided inside the cap. The cap is installed on the external thread ring through the internal thread. At this time, the switch rod is located inside the cap. When the natural gas pipeline leakage emergency shut-off valve is used, the cap can be used to hide the switch rod so that the cap will not be exposed to the outside. At this time, the switch rod will not be accidentally touched, which is very convenient to use.

[0015] 2. The natural gas pipeline leakage emergency shut-off valve is connected by fixing the connecting pipe on the surface of the natural gas valve, and welding a flange on the other end of the connecting pipe, and at the same time welding a baffle on the surface of the flange, welding an external threaded rod on the side of the baffle, the external threaded rod penetrates the positioning piece, and a nut is installed on the surface of the external threaded rod, the nut is located on the side of the positioning piece, and a positioning ring is fixedly connected to the side of the positioning piece, and the flange is located inside the positioning ring. At this time, when using the flange to install the natural gas pipeline for the natural gas pipeline leakage emergency shut-off valve, the flange can be directly embedded in the positioning ring. At this time, the flange will be aligned, and then the flange only needs to be rotated to the appropriate position for installation, which provides a positioning effect for the flange and is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cap structure of the utility model;

[0019] Figure 3This is a schematic diagram of the baffle structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the positioning ring structure of the utility model.

[0021] Explanation of the markings in the figure: 1. Natural gas valve; 2. Connecting pipe; 3. Control device; 4. Switch rod; 5. External thread ring; 6. Cover cap; 7. Internal thread; 8. Fixed ring; 9. Magnet sheet; 10. Iron sheet; 11. Anti-sliding block; 12. Flange; 13. Baffle; 14. Positioning sheet; 15. Positioning ring; 16. External thread rod; 17. Nut; 18. Sealing ring. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0026] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0027] In order to better understand the purpose, structure and function of the utility model, the natural gas pipeline leakage emergency shut-off valve of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-4 As shown, the natural gas pipeline leakage emergency shut-off valve of the utility model comprises a natural gas valve 1, a switch rod 4 is installed on the top of the natural gas valve 1, an external threaded ring 5 is welded on the top of the natural gas valve 1, and by installing the external threaded ring 5, when it is necessary to install the cap 6, the cap 6 can be installed on the external thread through the internal internal thread 7, at this time, the cap 6 can be provided with an installation effect, which is very convenient to use, a cap 6 is provided on the top of the natural gas valve 1, an internal thread 7 is provided inside the cap 6, the cap 6 is connected to the external threaded ring 5 through the internal thread 7, the switch rod 4 is located inside the cap 6, by installing the cap 6, the switch rod 4 is hidden by the cap 6, so that the cap 6 will not be exposed to the outside, and the switch rod 4 will not be accidentally touched, which is very convenient to use.

[0029] The surface of the natural gas valve 1 is fixedly connected to the connecting pipe 2, the other end of the connecting pipe 2 is welded to the flange 12, the baffle 13 is welded to the surface of the flange 12, the side of the baffle 13 is welded to the external threaded rod 16, the external threaded rod 16 passes through the positioning piece 14, the surface of the external threaded rod 16 is installed with a nut 17, the nut 17 is located on the side of the positioning piece 14, the side of the positioning piece 14 is fixedly connected with a positioning ring 15, the flange 12 is located inside the positioning ring 15, by installing the positioning ring 15, when installing the flange 12, the flange 12 can be directly embedded in the positioning ring 15, at this time, the flange 12 will be aligned, and then the flange 12 only needs to be rotated to a suitable position for installation, which provides a positioning effect for the flange 12 and is very convenient to use.

[0030] A control device 3 is installed on the surface of the natural gas valve 1, a magnet sheet 9 is bonded to the top of the control device 3, the top of the magnet sheet 9 is attached to the iron sheet 10, and a cap 6 is welded to the top of the iron sheet 10. By installing the magnet sheet 9, when the cap 6 needs to be placed aside, the iron sheet 10 on the cap 6 can be placed on the magnet sheet 9. At this time, the magnetic attraction effect can be used to fix the cap 6 on the magnet sheet 9, which is very convenient to use.

[0031] A fixing ring 8 is welded at the bottom of the control device 3, the magnet sheet 9 is located inside the fixing ring 8, and the iron sheet 10 is embedded in the fixing ring 8. By installing the fixing ring 8, when the iron sheet 10 and the magnet sheet 9 need to be fitted together, the fixing ring 8 can be used to provide a positioning effect for the iron sheet 10, and at the same time provide a limiting effect for the iron sheet 10, so that it has greater stability during use.

[0032] A sealing ring 18 is bonded inside the flange 12 and is located at one end of the connecting pipe 2. By installing the sealing ring 18, when the flanges 12 are installed to each other, the sealing ring 18 can be used to provide a sealing effect, and the sealing performance is strong during use.

[0033] An anti-sliding block 11 is welded on the surface of the cap 6, and the anti-sliding block 11 is distributed in a ring shape. By installing the anti-sliding block 11, when the cap 6 is rotated, the anti-sliding block 11 can be used to increase the friction for the palm, which is very labor-saving when used.

[0034] The working principle of the natural gas pipeline leakage emergency shut-off valve: When using the natural gas pipeline leakage emergency shut-off valve, the natural gas pipeline leakage emergency shut-off valve should be installed on the natural gas pipeline first. At this time, the external threaded rod 16 is first inserted through the positioning plate 14, and the positioning plate 14 is fixed on the baffle 13 by the nut 17. Then the flange 12 on the natural gas pipeline is embedded in the positioning ring 15, and then the flange 12 is rotated to a suitable position, and then they can be installed with each other. The positioning ring 15 provides a positioning effect for the flange 12 during installation, which is very convenient to use. Then the cap 6 is installed on the external threaded ring 5 through the internal thread 7. At this time, the switch rod 4 is located inside the cap 6. When using the natural gas pipeline leakage emergency shut-off valve, The switch rod 4 can be hidden by the cover cap 6 so that the cover cap 6 will not be exposed to the outside. At this time, the switch rod 4 will not be touched by mistake, which is very convenient to use. Later in use, when the natural gas pipeline leakage emergency shut-off valve senses a leak in the natural gas pipeline, the control device 3 will control the switch rod 4 to close the natural gas pipeline leakage emergency shut-off valve. When the natural gas pipeline leakage emergency shut-off valve needs to be reopened, the cover cap 6 is first rotated down, and the iron sheet 10 on the cover cap 6 is embedded in the fixing ring 8 until it fits onto the magnet sheet 9 to fix the cover cap 6, and then the switch rod 4 is lifted upward to open the natural gas pipeline leakage emergency shut-off valve, and finally the cover cap 6 is installed on the external threaded ring 5 again.

[0035] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A natural gas pipeline leakage emergency shut-off valve, comprising a natural gas valve (1), characterized in that: A switch rod (4) is installed on the top of the natural gas valve (1), an external thread ring (5) is welded on the top of the natural gas valve (1), a cover cap (6) is provided on the top of the natural gas valve (1), an internal thread (7) is provided inside the cover cap (6), the cover cap (6) is connected to the external thread ring (5) via the internal thread (7), and the switch rod (4) is located inside the cover cap (6).

2. The natural gas pipeline leakage emergency shut-off valve according to claim 1 is characterized by: The surface of the natural gas valve (1) is fixedly connected to a connecting pipe (2), the other end of the connecting pipe (2) is welded to a flange (12), a baffle (13) is welded to the surface of the flange (12), an external threaded rod (16) is welded to the side of the baffle (13), the external threaded rod (16) passes through a positioning piece (14), a nut (17) is installed on the surface of the external threaded rod (16), the nut (17) is located on the side of the positioning piece (14), the side of the positioning piece (14) is fixedly connected to a positioning ring (15), and the flange (12) is located inside the positioning ring (15).

3. The natural gas pipeline leakage emergency shut-off valve according to claim 1 is characterized by: The control device (3) is mounted on the surface of the natural gas valve (1), a magnet sheet (9) is bonded to the top of the control device (3), the top of the magnet sheet (9) is attached to an iron sheet (10), and a cap (6) is welded to the top of the iron sheet (10).

4. The natural gas pipeline leakage emergency shut-off valve according to claim 3 is characterized by: A fixing ring (8) is welded to the bottom of the control device (3), the magnet sheet (9) is located inside the fixing ring (8), and the iron sheet (10) is embedded inside the fixing ring (8).

5. The natural gas pipeline leakage emergency shut-off valve according to claim 2 is characterized by: A sealing ring (18) is bonded inside the flange (12), and the sealing ring (18) is located at one end of the connecting pipe (2).

6. The natural gas pipeline leakage emergency shut-off valve according to claim 1, characterized in that: An anti-sliding block (11) is welded on the surface of the cover cap (6), and the anti-sliding block (11) is distributed in a ring shape.

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