CN212899997U

CN212899997U - Leakage-proof natural gas pipeline sealing valve

Info

Publication number: CN212899997U
Application number: CN202021264534.2U
Authority: CN
Inventors: 陈明; 马开冀
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-04-06
Anticipated expiration: 2030-07-01

Abstract

The utility model relates to a pipeline seal valve related technical field, specifically a natural gas pipeline seal valve that prevents leakage, including protective tube and the valve body that sets up inside the protective tube, the protective tube is a section of pipe, and has all seted up the internal thread structure on the both ends inside wall of its body, the right-hand member of seal valve is the air inlet, its left end is the gas vent, and the air inlet position department is connected with the admission line, the position department of its gas vent is connected with the exhaust duct, and the right-hand member of protective tube is provided with first sealed lid, and its right-hand member is provided with the second sealed lid, first sealed lid is a lid structure, and the tip of its lid opening position department has seted up the external screw thread structure, and it screws up on the body of protective tube through the external screw; the sealing valve has the advantages that the protective pipe is arranged on the outer surface of the valve body, so that the sealing effect of the sealing valve is improved through the double-layer protection effect of the valve body and the protective pipe, and the safety of the sealing valve is effectively improved.

Description

Leakage-proof natural gas pipeline sealing valve

Technical Field

The utility model relates to a pipeline seal valve technical field that is relevant specifically is a natural gas line seal valve who prevents leakage.

Background

The natural gas refers to all gases naturally existing in nature, including gases formed in various natural processes in an atmospheric space, a water space and a rock space (including oil field gas, gas field gas, mud volcanic gas, coal bed gas, biogenetic gas and the like); when natural gas leaks, the oxygen concentration in the air in the room is reduced, and when the methane content in the air reaches 10%, the human body is suffocated. Heavy hydrocarbon has the paralysis effect to human central nervous system, when propane content reaches 10% in the air, the people will stumble in it and stay 2 ~ 3min, it can lead to death to stay for a long time, and the leakage point of natural gas mostly appears in the hookup location department of natural gas valve and pipeline and the position department of natural gas valve pivot, though people's kitchen all can install natural gas leakage alarm device now, when natural gas concentration reaches alarm value in the air, its natural gas has led to the fact a large amount of leakages, and has led to the fact certain harm to the human body under the environment of this concentration, and the leakage of this part of natural gas also can cause the waste of resource, for this reason, the utility model provides a natural gas pipeline seal valve that prevents leaking is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a natural gas line seal valve that prevents to leak to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a natural gas pipeline sealing valve for preventing leakage comprises a protective pipe and a valve body arranged inside the protective pipe, wherein the protective pipe is a round pipe, inner thread structures are arranged on the inner side walls of the two ends of the pipe body, an air inlet is arranged at the right end of the valve body, an air outlet is arranged at the left end of the valve body, an air inlet pipeline is connected to the position of the air inlet, an exhaust pipeline is connected to the position of the air outlet, a first sealing cover is arranged at the right end of the protective pipe, a second sealing cover is arranged at the right end of the protective pipe, the first sealing cover is of a cover body structure, an external thread structure is arranged at the end part of the opening position of the cover body, the first sealing cover is fixedly screwed on the pipe body of the protective pipe through external threads at the end part of the first sealing cover, a sealing ring is arranged at the opening end part of the first sealing cover, the sealing ring is, and the connection mode is fixed welding.

Preferably, the upper end of the valve body is provided with a valve rotating handle, a mounting hole is formed in the position, located on the valve rotating handle, of the protective pipe, a mechanical seal is installed in the hole body, and a rotating shaft structure of the valve rotating handle is fixedly installed in an inner ring of the mechanical seal.

Preferably, the position department integrative casting of inside wall both ends of protective tube has spacing seat, spacing seat is the annular structure that the cross-section is the rectangle, and its lateral surface that leans on the protective tube has seted up the seal groove, and is provided with seal ring in its notch, and its notch position is corresponding with the structural seal ring position of sealed lid, and the seal ring embedding sets up among the notch of seal groove.

Preferably, the bottom surface of the cover body of the first sealing cover is provided with a through hole, sealing rubber is arranged in the hole body, the outer ring of the sealing rubber is fixedly connected in the through hole in an adhesive manner, the inner ring of the sealing rubber is attached to the outer surface of the air inlet pipeline, and the second sealing cover is identical to the first sealing cover in structure and is connected with the protective pipe in the same connection manner.

Preferably, a barometer is arranged in a cavity between the protective tube and the valve body, an instrument panel of the barometer is arranged on the outer surface of the protective tube, an air valve is arranged at the lower end of the instrument panel, inert gas is filled into the cavity between the protective tube and the valve body, and the relative difference value between the inflation pressure in the cavity and the standard atmospheric pressure is 500 Pa.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the sealing effect of the sealing valve is improved through the double-layer protection effect of the valve body and the protection pipe by arranging the protection pipe on the outer surface of the valve body, so that the safety of the sealing valve is effectively improved;

2. the air pressure gauge is arranged in the cavity between the protection pipe and the valve body, the air valve is arranged on the protection pipe, air with the relative difference value of 500Pa with the atmospheric pressure is flushed into the cavity between the protection pipe and the valve body, the air pressure gauge is in electric signal connection with the alarm through the PLC control system, and therefore whether the leakage phenomenon occurs at the connection position of the natural gas valve and the pipeline and the position of the natural gas valve rotating shaft or not is detected according to the gas pressure in the air cavity.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a half sectional view of the present invention;

fig. 3 is an enlarged schematic view of a structure in fig. 2.

In the figure: the device comprises a protective pipe 1, a valve body 2, an air inlet 3, an air outlet 4, an air inlet pipeline 5, an air outlet pipeline 6, a valve rotating handle 7, a mechanical seal 8, a connecting column 9, a first seal cover 10, a second seal cover 11, a limiting seat 12, a sealing washer 13, sealing rubber 14, an instrument panel 15, an air valve 16 and a sealing ring 17.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a natural gas pipeline sealing valve for preventing leakage comprises a protective pipe 1 and a valve body 2 arranged inside the protective pipe 1, wherein the protective pipe 1 is a section of round pipe, the inner side walls of the two ends of the pipe body are respectively provided with an internal thread structure, the right end of the valve body 2 is an air inlet 3, the left end of the valve body is an air outlet 4, the position of the air inlet is connected with an air inlet pipeline 5, the position of the air outlet 4 is connected with an exhaust pipeline 6, the right end of the protective pipe 1 is provided with a first sealing cover 10, the right end of the protective pipe is provided with a second sealing cover 11, the first sealing cover 10 is a cover body structure, the end part of the opening position of the cover body is provided with an external thread structure, the external thread structure is fixedly screwed on the pipe body of the protective pipe 1 through the external thread of the end part, the opening end part of the first sealing cover 10 is provided with a sealing ring 17, the sealing ring 17 is an annular structure with, the connection mode is fixed welding, and the protection pipe layer is arranged on the outer surface of the valve body 2, so that the sealing effect of the sealing valve is improved through the double-layer protection effect of the valve body 2 and the protection pipe 1, and the safety of the sealing valve is effectively improved.

Furthermore, a valve rotating handle 7 is arranged at the upper end of the valve body 2, a mounting hole is formed in the position, located on the valve rotating handle 7, of the protective pipe 1, a mechanical seal 8 is installed in the hole body position, and a rotating shaft structure of the valve rotating handle 7 is fixedly installed in an inner ring of the mechanical seal 8;

furthermore, the position of two ends of the inner side wall of the protective pipe 1 is integrally cast with a limiting seat 12, the limiting seat 12 is an annular structure with a rectangular section, a sealing groove is formed on the outer side surface of the limiting seat close to the protective pipe 1, a sealing washer 13 is arranged in a notch of the limiting seat, the notch of the limiting seat corresponds to a sealing ring 17 on the sealing cover structure, and the sealing ring 17 is embedded in the notch of the sealing groove, so that the sealing performance of the connecting part is improved;

furthermore, the bottom surface of the cover body of the first sealing cover 10 is provided with a through hole, a sealing rubber 14 is arranged in the hole body, the outer ring of the sealing rubber 14 is fixedly connected in the through hole in an adhesive manner, the inner ring of the sealing rubber 14 is attached to the outer surface of the air inlet pipeline 5, and the second sealing cover 11 has the same structure as the first sealing cover 10 and is connected with the protective pipe 1 in the same connection manner;

further, a barometer is arranged in a cavity between the protection tube 1 and the valve body 2, an instrument panel 15 of the barometer is arranged on the outer surface of the protection tube 1, an air valve 16 is arranged at the lower end of the instrument panel 15, inert gas is filled in the cavity between the protection tube 1 and the valve body 2, the relative difference value of the inflation pressure in the cavity and the standard atmospheric pressure is 500Pa, the barometer is arranged in the cavity between the protection tube 1 and the valve body 2, an air valve is arranged on the protection tube 1, air with the relative difference value of 500Pa is filled in the cavity between the protection tube 1 and the valve body 2, the barometer is electrically connected with an alarm through a PLC control system, and whether the leakage phenomenon occurs at the connection position of the natural gas valve and the pipeline and the position of the natural gas valve rotating shaft or not is detected according to the gas pressure in the air cavity, it is more secure than conventional alarm devices;

the working principle is as follows: when in actual use, a worker firstly sleeves the first sealing cover 10 and the second sealing cover 11 on the pipe bodies of the air inlet pipe 5 and the exhaust pipe 6 respectively, then connects and installs the air inlet 3 and the air inlet pipe 5, then connects and installs the exhaust port 4 and the exhaust pipe 6, then screws and installs the first sealing cover 10 and the second sealing cover 11 on the pipe body of the protection pipe 1 respectively, then inflates the cavity between the protection pipe 1 and the valve body 2 through the air valve 6, ensures that the relative atmospheric pressure of the inflated air is 500Pa compared with the standard atmospheric pressure, and indicates that the leakage occurs at the position of the valve when the pressure in the cavity is increased and indicates that the leakage occurs at the position of the protection pipe 1 when the internal pressure is reduced because the relative atmospheric pressure of the gas conveyed in the pipeline of the natural gas pipeline is 1500Pa to 3000Pa, and due to the action of the alarm, the alarm can be given out when the pressure in the cavity is too high or too low, so that the safety of the pipeline sealing valve in actual use is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a natural gas line seal valve of preventing leakage, includes protecting pipe (1) and sets up valve body (2) inside protecting pipe (1), its characterized in that: protective tube (1) is a section of pipe, and has all seted up internal thread structure on the both ends inside wall of its body, the right-hand member of valve body (2) is air inlet (3), and its left end is gas vent (4), and air inlet position department is connected with admission line (5), and the position department of its gas vent (4) is connected with exhaust duct (6), and the right-hand member of protective tube (1) is provided with first sealed lid (10), and its right-hand member is provided with the sealed lid (11) of second, first sealed lid (10) are a lid structure, and the tip of its lid open position department has seted up external screw thread structure, and its external screw thread through its tip is fixed to be screwed up on the body of protective tube (1), and the opening tip of first sealed lid (10) is provided with sealing ring (17), sealing ring (17) are the annular structure of a cross-section for the rectangle, carry out through spliced pole (9) between the surface of valve body (2) and the body inner wall of Fixedly connected and the connection mode is fixed welding.

2. The leakage prevention natural gas pipeline sealing valve according to claim 1, wherein: the upper end of the valve body (2) is provided with a valve rotating handle (7), a mounting hole is formed in the position, located on the valve rotating handle (7), of the protective pipe (1), a mechanical seal (8) is installed in the hole body position of the protective pipe, and a rotating shaft structure of the valve rotating handle (7) is fixedly installed in an inner ring of the mechanical seal (8).

3. The leakage prevention natural gas pipeline sealing valve according to claim 1, wherein: the utility model discloses a sealing structure, including protective tube (1), spacing seat (12), sealing washer (13), sealing washer (17) and sealing washer (13) are sealed to the lateral surface that the inside wall both ends position department of protective tube (1) integrated casting of protective tube (1) has spacing seat (12), spacing seat (12) are the annular structure of rectangle for the cross-section, and it leans on protective tube (1) to seted up the seal groove, and is provided with in its notch and seals washer (13), and its notch position is corresponding with the structural sealing.

4. The leakage prevention natural gas pipeline sealing valve according to claim 1, wherein: the bottom surface of the cover body of the first sealing cover (10) is provided with a through hole, sealing rubber (14) is installed in the hole body, the outer ring of the sealing rubber (14) is fixedly connected in the through hole in an adhesive mode, the inner ring of the sealing rubber (14) is attached to the outer surface of the air inlet pipeline (5), and the second sealing cover (11) is identical to the first sealing cover (10) in structure and is connected with the protective pipe (1) in the same connection mode.

5. The leakage prevention natural gas pipeline sealing valve according to claim 1, wherein: an air pressure meter is arranged in a cavity between the protective pipe (1) and the valve body (2), an instrument panel (15) of the air pressure meter is arranged on the outer surface of the protective pipe (1), an air valve (16) is arranged at the lower end of the instrument panel (15), air is filled into the cavity between the protective pipe (1) and the valve body (2), and the relative difference value between the inflation pressure in the cavity and the standard atmospheric pressure is 500 Pa.