US-12624804-B2 - Device for real-time detection of pipeline gas leakage and leakage prevention, and use method

US12624804B2US 12624804 B2US12624804 B2US 12624804B2US-12624804-B2

Abstract

A device for real-time detection of pipeline gas leakage and leakage prevention includes a gas pipeline, wherein a gas detector is arranged at an outer part of the gas pipeline, a telescopic cylinder is also electrically connected to an outer side of the gas detector, a plurality of three-way elliptical pipes are mounted at a middle segment part of the gas pipeline, a limiting cylinder is fixedly mounted at a bottom port of each three-way elliptical pipe, a separating mechanism is arranged between each limiting cylinder and the three-way elliptical pipe, and a pneumatic mechanism is arranged at a bottom of the limiting cylinder. After detecting gas leakage, the gas detector immediately triggers the telescopic cylinder through an electrical signal, and the pneumatic mechanism triggers the separating mechanism to separate and seal the three-way elliptical pipe when being driven by the telescopic cylinder.

Inventors

Zhenping SUN
Xiao Liu
Sheng XUE
Yingji FANG
Yanan GAO
Feng DOU

Assignees

Anhui University of Science and Technology
CHINA COAL TECHNOLOGY & ENGINEERING GROUP SHENYANG ENGINEERING COMPANY
CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Dates

Publication Date: 20260512
Application Date: 20230621

Claims (5)

1 . A device for real-time detection of pipeline gas leakage and leakage prevention, comprising a gas pipeline, wherein a gas detector is arranged at an outer part of the gas pipeline, a telescopic cylinder is also electrically connected to an outer side of the gas detector, a plurality of three-way elliptical pipes are mounted at a middle segment part of the gas pipeline, flange connectors being abutted with the gas pipeline are fixedly arranged at two ends of each three-way elliptical pipe, a limiting cylinder is fixedly mounted at a bottom port of each three-way elliptical pipe, a separating mechanism is arranged between each limiting cylinder and each three-way elliptical pipe, and a pneumatic mechanism is arranged at a bottom of the limiting cylinder and is capable of triggering each separating mechanism to separate and seal each three-way elliptical pipe when being driven by the telescopic cylinder; wherein the pneumatic mechanism comprises a sleeve cover threadedly sleeving to a bottom of each limiting cylinder, a gas pipe fixedly communicates to a bottom of each sleeve cover, one end away from each sleeve cover of the gas pipe jointly and fixedly communicates with an output end of a communicator, a gas delivery pipe is fixedly mounted at an input end of the communicator, and a gas cylinder communicates with one end away from the communicator of the gas delivery pipe; a piston block is embedded in the gas cylinder in a sliding manner, a first spring is arranged at one end close to the gas delivery pipe of the piston block, a push rod which penetrates through the gas cylinder in a sliding manner is fixedly mounted at one end away from the first spring, of the piston block, an another end of the push rod is fixedly connected with an output end of the telescopic cylinder, a first one-way gas valve of which a flowing direction is from an outer part of the gas cylinder to an inner part of the gas cylinder is arranged at one end close to the gas delivery pipe of the gas cylinder through a connecting pipe, and a second one-way gas valve of which a flowing direction is from the gas delivery pipe to the communicator is arranged on the gas delivery pipe; wherein each separating mechanism comprises an airbag fixedly mounted at a center of each three-way elliptical pipe through bolts, a connecting pipe fixedly communicates with an opening in a bottom of each airbag, each airbag is capable of being inflated to expand and tightly fill a middle of its respective three-way elliptical pipe, an abutting cylinder is fixedly mounted on an inner wall of each limiting cylinder, and a top of each abutting cylinder fixedly communicates with a bottom of each connecting pipe; wherein a protection mechanism is arranged at a bottom of each abutting cylinder, and comprises a cover plate fixedly mounted at a bottom of each abutting cylinder through screws, an extending cylinder which is embedded with an inner cylinder of each abutting cylinder in a sliding manner is fixedly mounted at an upper part of each cover plate, an inverted-conical bevel opening is formed between each extending cylinder and each cover plate, a plurality of through holes which are equidistantly distributed in a circumference are formed in a top of each extending cylinder, a positioning shaft is fixedly mounted at one end close to each inverted-conical bevel opening at a top of each extending cylinder, an elliptical sealing member sleeves an outer side of each positioning shaft, a sliding groove is formed in the elliptical sealing member, and a limiting disc which is embedded with each sliding groove in a sliding manner is fixedly mounted at a bottom of each positioning shaft; a second spring is arranged between an upper part of each elliptical sealing member and each extending cylinder, each elliptical sealing member is squeezed by each second spring, and an outer diameter of each elliptical sealing member is greater than a bottom diameter of each inverted-conical bevel opening, so that each elliptical sealing member realizes one-way sealing of a lower port of each inverted-conical bevel opening from top to bottom; and a prodding assembly is arranged at a bottom of each cover plate and is capable of clearing a lower port of each inverted-conical bevel opening from top to bottom by lifting each elliptical sealing member, and a communicating assembly which is capable of adjusting internal airtightness of each limiting cylinder is arranged between each prodding assembly and each limiting cylinder; wherein each prodding assembly comprises a damping rotating shaft fixedly embedded in each limiting cylinder, each damping rotating shaft is distributed below each cover plate, a rotating shaft part is arranged in each damping rotating shaft, a cam fixedly sleeves an outer surface of each rotating shaft part and is located directly below each elliptical sealing member, a knob is fixedly mounted at one end of each rotating shaft part, and another end of each rotating shaft part is rotatably embedded in each limiting cylinder; wherein each communicating assembly comprises a blocking rotary table fixedly mounted at one end away from each knob of each rotating shaft part, each blocking rotary table is rotatably embedded in each limiting cylinder, a first air hole is formed in each limiting cylinder, a second air hole is formed in each blocking rotary table, wherein when each rotating shaft part drives each cam to rotate until a protruding part of each cam points directly upwards, each first air hole and each second air hole are abutted, and an internal space and an external space of each limiting cylinder are in communication.
2 . The device for real-time detection of pipeline gas leakage and leakage prevention according to claim 1 , wherein connecting lines between each airbag and each set of two flange connectors are vertically distributed, and each airbag is made of a silicone rubber material.
3 . The device for real-time detection of pipeline gas leakage and leakage prevention according to claim 1 , wherein a rubber coating is arranged at an outer part of each elliptical sealing member.
4 . The device for real-time detection of pipeline gas leakage and leakage prevention according to claim 1 , wherein a triangular identifier is arranged on each knob, and a direction of each triangular identifier is the same as that of a protruding part of each cam.
5 . A use method of a device for real-time detection of pipeline gas leakage and leakage prevention, comprising the following steps: S1: a detection triggering stage: after detecting gas leakage, immediately triggering a telescopic cylinder through an electrical signal by a gas detector, thereby causing an output end of the telescopic cylinder to drive a piston block to move back and forth in a gas cylinder; S2: an expansion and isolation stage: inflating an airbag through a one-way blocking effect of a first one-way gas valve and a second one-way gas valve during reciprocating motion of the piston block, and after being inflated, tightly filling a middle of a three-way elliptical pipe by the airbag, thereby achieving blocking and sealing of the three-way elliptical pipe; and S3: a deflation stage: after maintenance is completed, rotating a knob, driving a protruding part of a cam to point directly upwards by a damping rotating shaft and a rotating shaft part, lifting an elliptical sealing member upwards by the protruding part of the cam, so that a first air hole and a second air hole are abutted, forming a gas path by an inner part of the airbag and an outer part of the device, and under an action of pressure, shrinking the airbag due to air leakage, and unobstructing an inner part of the three-way elliptical pipe.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of detection of pipeline gas leakage, and in particular to a device for real-time detection of pipeline gas leakage and leakage prevention and a use method. 2. The Prior Arts Gas is generally a general term for gas fuels by the public, which can be divided into three categories: coal gas, liquefied petroleum gas, and natural gas. At present, gas appliances such as the coal gas, the liquefied petroleum gas, and the natural gas have been widely used in people's lives. Switches and ventilation pipelines of the gas appliances are prone to poor sealing or aging and cracking, causing gas leakage and posing a great threat to personal safety. The Chinese patent with the publication No. CN115683468A discloses a gas leakage detection device for gas appliances, including a first detector and a second detector, where the first detector is mounted on a gas stove and can detect gas leakage in the gas stove, and the second detector is mounted in the gas stove and can detect gas leakage in a gas delivery pipe in the gas stove. When gas leakage occurs in the gas stove or the gas delivery pipe, it can be detected and an alarm can be issued immediately, and through design of an APP alarm module, gas leakage information can be transmitted to mobile phones. The gas leakage detection device for gas appliances provided in the prior art can only play a monitoring and warning role in gas leakage. When there is no person indoors, prevention of continuous gas leakage in a short period of time cannot be realized, resulting in a large amount of gas waste and significant safety hazards. In addition, conventional gas cut-off devices are generally arranged at a main valve of the gas pipeline. Although the main valve can be cut off in case of gas leakage, gas stored in an end pipeline will continue to leak, posing a threat to personal safety. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a device for real-time detection of pipeline gas leakage and leakage prevention and a use method, in response to defects existing in the prior art, thereby achieving timely detection of gas leakage and segmented sealing of a gas pipeline. In order to realize the objective, the present invention adopts the technical solution, the device for real-time detection of pipeline gas leakage and leakage prevention includes a gas pipeline, wherein a gas detector is arranged at an outer part of the gas pipeline, a telescopic cylinder is also electrically connected to an outer side of the gas detector, a plurality of three-way elliptical pipes are mounted at a middle segment part of the gas pipeline, flange connectors being abutted with the gas pipeline are fixedly arranged at two ends of each three-way elliptical pipe, a limiting cylinder is fixedly mounted at a bottom port of each three-way elliptical pipe, a separating mechanism is arranged between each limiting cylinder and the three-way elliptical pipe, and a pneumatic mechanism is arranged at a bottom of the limiting cylinder and is capable of triggering the separating mechanism to separate and seal the three-way elliptical pipe when being driven by the telescopic cylinder. Further, the pneumatic mechanism includes a sleeve cover threadedly sleeving to a bottom of each limiting cylinder, a gas pipe fixedly communicates to a bottom of the sleeve cover, one end away from the sleeve cover of the gas pipe jointly and fixedly communicates with an output end of a communicator, a gas delivery pipe is fixedly mounted at an input end of the communicator, and a gas cylinder communicates with one end away from the communicator of the gas delivery pipe; and a piston block is embedded in the gas cylinder in a sliding manner, a first spring is arranged at one end close to the gas delivery pipe of the piston block, a push rod which penetrates through the gas cylinder in a sliding manner is fixedly mounted at one end away from the first spring, of the piston block, an another end of the push rod is fixedly connected with an output end of the telescopic cylinder, a first one-way gas valve of which a flowing direction is from an outer part of the gas cylinder to an inner part of the gas cylinder is arranged at one end close to the gas delivery pipe, of the gas cylinder through a connecting pipe, and a second one-way gas valve of which a flowing direction is from the gas delivery pipe to the communicator is arranged on the gas delivery pipe. Further, the separating mechanism includes an airbag fixedly mounted at a center of the three-way elliptical pipe through bolts, a connecting pipe fixedly communicates with an opening in a bottom of the airbag, the airbag is capable of being inflated to expand and tightly fill a middle of the three-way elliptical pipe, an abutting cylinder is fixedly mounted on an inner wall of the limiting cylinder, and a top of the abutting cylinder fixedly com