Urban gas pipeline leakage detecting and positioning device

Abstract

The utility model discloses an urban gas pipeline leakage detecting and positioning device, and belongs to the technical field of gas detection. Comprising a detection frame internally provided with a gas sensor; the vacuum pump is fixedly connected to one side of the detection frame; the fastening hand wheel is rotationally connected to one side of the detection frame; the clamping frame is in threaded connection with the exterior of the fastening hand wheel and is in sliding limit with the detection frame; the closed frame is additionally provided with a positioning pin, is inserted and mounted on one side of the detection frame and is clamped and matched with the clamping frame; the sealing sheet is clamped and mounted between the closed frame and the detection frame; and the plurality of pipe orifice sleeves are used for being attached to the gas pipeline for sealing and are symmetrically mounted outside the closed frame and the detection frame. When the detection frame and the closing frame are closed to form the frame body which is tightly clamped and mounted at the joint of the gas pipeline, the gas content in the frame body is detected after the gas in the exhaust frame of the vacuum pump, whether the leakage condition occurs at the joint of the pipeline or not is quickly judged, and the gas detection efficiency at the joint of the pipeline is improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas detection, and more specifically, to a device for detecting and locating leakage in a city gas pipeline. Background Art

[0002] As a "smokeless industry" and strategic industry with "low consumption, high returns, low pollution and high efficiency", natural gas plays a major role in the national economy and sustainable development. However, due to the substantial increase in gas users and the long-term use of gas equipment, there will inevitably be some safety hazards. Therefore, it is necessary to conduct regular leakage detection at the connection points of urban gas pipelines to ensure the safety of gas transportation.

[0003] A document with prior art disclosure (announcement) number CN118009256A provides a city gas pipeline leak detection and positioning device. In the related technology of the device, the air pressure inside the casing is increased by the leaking gas, so that the air pressure inside the casing is greater than the external air pressure. The air pressure inside the casing will push the push block to move upward, and the push block will push the conductive sphere on the push rod to move, so that the conductive sphere will be stuck inside the conductive shell, so that the alarm mechanism will form a closed loop, and the alarm light and the buzzer will light up at the same time, so as to alert the staff and prevent the gas from continuing to leak and causing unnecessary consequences.

[0004] Although the above-mentioned prior art solution can achieve the relevant beneficial effects through the structure of the prior art, it still has the following defects: the device uses the pressure difference of gas leakage for detection. Although the effect is obvious, the leakage conditions at the pipeline leakage points are different, and a lot of waiting time is required during detection, which is not conducive to the device to quickly detect gas leaks at the pipeline connection points.

[0005] In view of this, we propose a city gas pipeline leak detection and positioning device. Utility Model Content

[0006] In order to improve the problems raised in the above background technology, the present application provides a city gas pipeline leakage detection and positioning device.

[0007] The urban gas pipeline leakage detection and positioning device provided in this application adopts the following technical solutions:

[0008] A city gas pipeline leakage detection and positioning device, comprising:

[0009] A detection frame with a gas sensor installed inside;

[0010] A vacuum pump is fixedly connected to one side of the detection frame and is electrically connected to an external controller of the gas sensor;

[0011] Tighten the hand wheel and turn it to connect to one side of the detection frame;

[0012] The clamping frame is threadedly connected to the outside of the fastening hand wheel and is limited by the sliding movement of the detection frame;

[0013] A closed frame with positioning pins is installed on one side of the detection frame and is snap-fitted with the clamping frame;

[0014] A sealing sheet, clamped and installed between the closing frame and the detection frame;

[0015] A plurality of pipe mouth sleeves for sealing the gas pipeline are symmetrically installed outside the closing frame and the detection frame.

[0016] By adopting the above technical scheme, the detection frame and the closing frame are closed to form a frame that is tightly clamped and installed at the gas pipeline connection. After the vacuum pump discharges the gas in the frame, the gas content inside the frame is detected to quickly determine whether a leakage occurs at the pipeline connection, thereby improving the gas detection efficiency at the pipeline connection, and the pipe mouth sleeve can be replaced according to the specifications of the pipeline to be tested, thereby further improving the flexibility of the device.

[0017] As an optional solution of the technical solution of the present application document, the clamping frame includes a threaded pull frame, and both ends of the threaded pull frame arranged in a U-shaped structure are hingedly installed with a snap-fit ​​frame, and one end of the snap-fit ​​frame is fixedly connected to a rubber layer.

[0018] By adopting the above technical solution, the threaded pull frame and the snap-fit ​​frame are hinged to form a clamping frame, so as to achieve flexible snap-fitting and pressing of the closing frame, and keep the closing frame and the detection frame closed and sealed.

[0019] As an optional solution to the technical solution of the present application document, a closing plate is hingedly installed inside and outside the observation window opened on one side of the closing frame, a rubber sheet with a ring structure is fixedly connected to one side of the closing plate, and the closing plate is connected to the observation window through the rubber sheet to limit the position.

[0020] By adopting the above technical solution and using a closing plate equipped with a rubber sheet, the position of the closing plate on the observation window can be limited, which facilitates the adjustment of the opening and closing range of the closing plate.

[0021] As an optional solution of the technical solution of the present application document, the sealing sheet arranged in a rectangular structure is fixedly connected to the outside with a positioning plate, and the side wall of the sealing sheet is arranged in a wavy shape.

[0022] By adopting the above technical solution, a positioning plate is sleeved on the outside of the fitting part between the closing frame and the detection frame, so that the sealing sheet can be installed more in place, thereby ensuring the sealing stability of the sealing sheet, and the sealing sheet with a wavy side wall can ensure the sealing effect of the fitting part between the closing frame and the detection frame.

[0023] As an optional solution to the technical solution of the present application document, a sealing ring with a horseshoe structure is embedded and installed on one side of the pipe mouth sleeve, and the side wall of the sealing ring is arranged in a serrated structure.

[0024] By adopting the above technical solution, a horseshoe-structured sealing ring is used to form a ring body of a sealing structure with two matching pipe mouth sleeves. The sealing sleeve is arranged on the outside of the gas pipeline for sealing, and the side wall is arranged in a serrated structure, which can improve the sealing stability of the sealing ring.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The present application utilizes the detection frame and the closing frame to close to form a frame that is tightly clamped and installed at the gas pipeline connection. After the vacuum pump discharges the gas in the frame, the gas content inside the frame is detected to quickly determine whether there is a leak at the pipeline connection, thereby improving the gas detection efficiency at the pipeline connection, and the pipe mouth sleeve can be replaced according to the specifications of the pipeline to be tested, thereby further improving the flexibility of the device.

[0027] 2. The present application utilizes a positioning plate sleeve mounted on the outside of the joint between the closing frame and the detection frame, so that the sealing sheet can be installed more in place and the sealing stability of the sealing sheet can be ensured. The sealing sheet with a wavy side wall can ensure the sealing effect of the joint between the closing frame and the detection frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram on the left side of the overall structure of a city gas pipeline leakage detection and positioning device disclosed in a preferred embodiment of the present application;

[0029] Figure 2 The right side schematic diagram of the overall structure of the urban gas pipeline leakage detection and positioning device disclosed in a preferred embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a clamping frame of a city gas pipeline leakage detection and positioning device disclosed in a preferred embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the installation of a closed frame structure of a city gas pipeline leakage detection and positioning device disclosed in a preferred embodiment of the present application;

[0032] Figure 5 A schematic diagram of the sealing sheet structure of a city gas pipeline leakage detection and positioning device disclosed in a preferred embodiment of the present application;

[0033] Figure 6 A schematic diagram of the disassembly of the pipe mouth sleeve structure of a city gas pipeline leakage detection and positioning device disclosed in a preferred embodiment of the present application;

[0034] Explanation of the numbers in the figure: 1. Detection frame; 2. Vacuum pump; 3. Tightening hand wheel; 4. Clamping frame; 5. Closing frame; 6. Sealing sheet; 7. Pipe mouth sleeve; 41. Threaded pull frame; 42. Snap-fit ​​frame; 51. Closing plate; 52. Rubber sheet; 61. Positioning plate; 71. Sealing ring. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings.

[0036] Reference Figure 1 and Figure 2 A city gas pipeline leakage detection and positioning device in the city gas pipeline leakage detection and positioning device described in the embodiment of the present application includes:

[0037] A detection frame 1 having a gas sensor installed therein;

[0038] The vacuum pump 2 is fixedly connected to one side of the detection frame 1 and is electrically connected to an external controller of the gas sensor;

[0039] Tighten the hand wheel 3 and rotate it to connect it to one side of the detection frame 1;

[0040] The clamping frame 4 is threadedly connected to the outside of the fastening hand wheel 3 and is slidably limited with the detection frame 1;

[0041] The closing frame 5 with positioning pins is installed on one side of the detection frame 1 and is engaged with the clamping frame 4;

[0042] The sealing sheet 6 is clamped and installed between the closing frame 5 and the detection frame 1;

[0043] A plurality of pipe opening sleeves 7 for sealing against the gas pipeline are symmetrically mounted outside the closing frame 5 and the detection frame 1 .

[0044] The city gas pipeline leakage detection and positioning device uses the detection frame 1 and the closing frame 5 to close the frame body to form a tightly clamped frame installed at the gas pipeline connection, and after the vacuum pump 2 discharges the gas in the frame, the gas content inside the frame 1 is detected to quickly determine whether a leakage occurs at the pipeline connection, thereby improving the gas detection efficiency at the pipeline connection, and the pipe mouth sleeve 7 can be replaced according to the specifications and dimensions of the pipeline to be tested, thereby further improving the flexibility of the device.

[0045] Reference Figure 3 and Figure 1 In the urban gas pipeline leakage detection and positioning device recorded in the embodiment of the present application, the clamping frame 4 includes a threaded pull frame 41, and both ends of the threaded pull frame 41 arranged in a U-shaped structure are hingedly installed with a snap-fit ​​frame 42, and one end of the snap-fit ​​frame 42 is fixedly connected to a rubber layer.

[0046] The city gas pipeline leakage detection and positioning device uses a threaded pull frame 41 and a snap-fit ​​frame 42 to hinge to form a clamping frame 4, thereby achieving flexible snap-fitting and pressing of a closing frame 5, and keeping the closing frame 5 and the detection frame 1 closed and sealed.

[0047] Reference Figure 4 and Figure 2 In the urban gas pipeline leakage detection and positioning device recorded in the embodiment of the present application, an observation window opened on one side of the closing frame 5 is hingedly installed with a closing plate 51 inside and outside, and a rubber sheet 52 with a ring structure is fixedly connected to one side of the closing plate 51, and the closing plate 51 is connected to the observation window through the rubber sheet 52 to limit the position.

[0048] The city gas pipeline leakage detection and positioning device can limit the position of the observation window by the closing plate 51 by using the closing plate 51 equipped with the rubber sheet 52, so as to facilitate the adjustment of the opening and closing range of the closing plate 51.

[0049] Reference Figure 5 and Figure 1 In the city gas pipeline leakage detection and positioning device recorded in the embodiment of the present application, the sealing sheet 6 arranged in a rectangular structure is fixedly connected to the outside of a positioning plate 61, and the side wall of the sealing sheet 6 is arranged in a wavy shape.

[0050] The city gas pipeline leakage detection and positioning device utilizes a positioning plate 61 to be sleeved on the outside of the fitting portion between the closing frame 5 and the detection frame 1, so that the sealing sheet 6 can be installed more in place and the sealing stability of the sealing sheet 6 can be ensured. The sealing sheet 6 with a wavy side wall can ensure the sealing effect of the fitting portion between the closing frame 5 and the detection frame 1.

[0051] Reference Figure 6 and Figure 1 In the urban gas pipeline leakage detection and positioning device recorded in the embodiment of the present application, a sealing ring 71 with a horseshoe structure is embedded and installed on one side of the pipe mouth sleeve 7, and the side wall of the sealing ring 71 is arranged in a serrated structure.

[0052] The city gas pipeline leakage detection and positioning device uses a horseshoe-structured sealing ring 71 to form a ring body with two matching pipe mouth sleeves 7. The sealing sleeve is arranged on the outside of the gas pipeline for sealing, and the side wall is arranged in a serrated structure, which can improve the sealing stability of the sealing ring 71.

[0053] Working principle: When the device is installed on the outside of the gas pipeline joint, the vacuum pump 2 is started by the external controller of the detection frame 1 to discharge the gas from the sealed space composed of the detection frame 1 and the closing frame 5;

[0054] As the gas inside the sealed space decreases, if a leak occurs at the gas pipeline joint, the gas in the pipe enters the sealed space composed of the detection frame 1 and the closing frame 5 under the suction of the vacuum pump 2, causing a sudden increase in the gas content in the frame;

[0055] At this time, the gas sensor installed in the detection frame 1 performs an alarm process according to the gas content in the sealed space formed by the detection frame 1 and the closing frame 5.

Claims

1. A city gas pipeline leakage detection and positioning device, characterized in that: include: A detection frame (1) having a gas sensor installed therein; A vacuum pump (2) is fixedly connected to one side of the detection frame (1) and is electrically connected to an external controller of the gas sensor; Tighten the hand wheel (3) and rotate it to connect it to one side of the detection frame (1); The clamping frame (4) is threadedly connected to the outside of the tightening hand wheel (3) and is slidably limited with the detection frame (1); A closing frame (5) equipped with positioning pins is plugged and installed on one side of the detection frame (1) and is engaged with the clamping frame (4); A sealing sheet (6) is clamped and installed between the closing frame (5) and the detection frame (1); A plurality of pipe opening sleeves (7) for sealing against a gas pipeline are symmetrically mounted outside the closing frame (5) and the detection frame (1).

2. The urban gas pipeline leakage detection and positioning device according to claim 1 is characterized in that: The clamping frame (4) comprises a threaded pull frame (41), and both ends of the threaded pull frame (41) arranged in a U-shaped structure are hingedly mounted with a snap-fit ​​frame (42), and one end of the snap-fit ​​frame (42) is fixedly connected with a rubber layer.

3. The urban gas pipeline leakage detection and positioning device according to claim 1 is characterized in that: A closing plate (51) is hingedly installed inside and outside the observation window opened on one side of the closing frame (5), a rubber sheet (52) in an annular structure is fixedly connected to one side of the closing plate (51), and the closing plate (51) is connected to the observation window for limiting position via the rubber sheet (52).

4. The urban gas pipeline leakage detection and positioning device according to claim 1 is characterized in that: The sealing sheet (6) arranged in a rectangular structure is fixedly connected to a positioning plate (61) on the outside, and the side wall of the sealing sheet (6) is arranged in a wave shape.

5. The urban gas pipeline leakage detection and positioning device according to claim 1 is characterized in that: A sealing ring (71) in a horseshoe structure is embedded and installed on one side of the pipe mouth sleeve (7), and the side wall of the sealing ring (71) is arranged in a sawtooth structure.

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