Urban underground gas pipeline leakage monitoring instrument

Abstract

The utility model discloses city underground gas pipeline leak monitor, including detector, still include half open type casing and fixed plate, two sets of half open type casing are set in gas pipeline junction, two sets of half open type casing and fixed plate slide fit, the detector is installed on the fixed plate, and the detection head of detector passes through half open type casing, the fixed plate is fixed with air bag, and the air bag is connected with half open type casing through the trachea. In the utility model, the detector is used to send alarm when detecting gas leakage, the leaked gas is introduced into the air bag through the trachea, is collected by the air bag, avoids the outward leakage of gas, improves the work safety of maintenance personnel, at the gas pipeline leakage place, rotates hand wheel drive worm reverses, and worm drive worm wheel drives two -way screw rod to rotate, and based on screw drive effect, drives both sides dovetail block to drive half open type casing to move outward and separate on gas pipeline, and it is convenient for maintenance personnel to carry out pipeline maintenance at gas leakage place.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a leak detector for urban underground gas pipelines. Background Technology

[0002] Gas pipelines are used to transport gas and are usually made of materials such as steel pipes, cast iron pipes, or plastic pipes. During long-term use, gas leaks are prone to occur at the pipe connections and valve installation points of underground gas pipelines. Therefore, gas pipeline leak detectors are often installed at locations where gas leaks are likely to occur for safety monitoring.

[0003] However, since gas pipelines are mostly buried underground, the air circulation underground is poor. Once a gas leak occurs at a leak-prone location such as a pipe joint, the gas leak detectors placed around the pipeline are difficult to detect and handle in a timely manner. This affects the reliability of existing gas pipeline leak detectors and causes leaked gas to accumulate, which can easily lead to safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide an urban underground gas pipeline leakage monitoring device in order to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The urban underground gas pipeline leak detector includes a detector, a semi-open housing, and a fixing plate. Two sets of semi-open housings are fitted at the gas pipeline connection. The two sets of semi-open housings are slidably fitted with the fixing plate. The detector is mounted on the fixing plate. The detector head passes through the semi-open housing. An air bladder is fixed on the fixing plate. The air bladder and the semi-open housing are connected by a gas pipe.

[0007] As a further description of the above technical solution:

[0008] Sealing strips are adhered to the opposite surfaces of the semi-open shell and the contact surface between the semi-open shell and the gas pipeline.

[0009] As a further description of the above technical solution:

[0010] The bottom side of the fixed plate is provided with a dovetail groove, and dovetail blocks are slidably connected to both sides of the dovetail groove. Each set of dovetail blocks is fixedly connected to the semi-open shell on the same side.

[0011] As a further description of the above technical solution:

[0012] The fixed plate is fixedly connected to limit plates at both ends, and a bidirectional screw rod that is threadedly connected to the two sets of dovetail blocks is rotatably installed between the two sets of limit plates.

[0013] As a further description of the above technical solution:

[0014] A worm gear is rotatably mounted on the top of the fixed plate, and a worm wheel that meshes with the worm gear is fixedly sleeved in the middle of the bidirectional lead screw.

[0015] As a further description of the above technical solution:

[0016] A handwheel is fixedly connected to the top of the worm gear.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: the detector issues an alarm when it detects a gas leak; the leaked gas is introduced into the gas bag through the gas pipe and collected by the gas bag, preventing the gas from leaking outward and improving the work safety of maintenance personnel; at the gas pipeline leak point, turning the handwheel drives the worm gear to reverse, and the worm gear drives the worm wheel to drive the bidirectional lead screw to rotate. Based on the thread transmission, the dovetail blocks on both sides drive the semi-open housing to move outward and detach from the gas pipeline, making it convenient for maintenance personnel to perform pipeline maintenance at the gas leak point. Attached Figure Description

[0018] Figure 1 A schematic diagram of the connection structure between the urban underground gas pipeline leak detector and the gas pipeline according to an embodiment of the present invention is shown.

[0019] Figure 2 A three-dimensional structural schematic diagram of an urban underground gas pipeline leak detector provided according to an embodiment of the present utility model is shown;

[0020] Figure 3 A top view schematic diagram of an urban underground gas pipeline leak detector provided according to an embodiment of the present utility model is shown;

[0021] Figure 4 It shows Figure 3 Cross-sectional view along the AA direction;

[0022] Figure 5 It shows Figure 3 Cross-sectional view along the middle BB direction;

[0023] Figure 6 It shows Figure 2 Enlarged diagram of point C in the middle.

[0024] Legend:

[0025] 1. Semi-open housing; 2. Detector; 3. Airbag; 4. Air tube; 5. Fixing plate; 501. Dovetail groove; 6. Worm gear; 7. Sealing strip; 8. Two-way lead screw; 9. Dovetail block; 10. Limiting plate; 11. Worm wheel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-6 This utility model provides a technical solution: an urban underground gas pipeline leak detector, including a detector 2, which is used to issue an alarm when a gas leak is detected. It also includes a semi-open housing 1 and a fixing plate 5. Two sets of semi-open housings 1 are fitted at the gas pipeline connection. Sealing strips 7 are glued to the opposite surfaces of the semi-open housings 1 and the contact surfaces of the semi-open housings 1 and the gas pipeline to prevent leaked gas from overflowing. The two sets of semi-open housings 1 are slidably fitted with the fixing plate 5. The detector 2 is installed on the fixing plate 5. The detection head of the detector 2 passes through the semi-open housing 1. An airbag 3 is fixed on the fixing plate 5. The airbag 3 and the semi-open housing 1 are connected by a gas pipe 4. The leaked gas is introduced into the airbag 3 through the gas pipe 4 and collected by the airbag 3 to prevent the gas from leaking outward and to facilitate maintenance personnel to perform pipeline maintenance at the gas leak point.

[0028] Specifically, such as Figure 2 , Figure 4 and Figure 5 As shown, a dovetail groove 501 is provided on the bottom side of the fixed plate 5, and dovetail blocks 9 are slidably connected to both sides of the dovetail groove 501. Each set of dovetail blocks 9 is fixedly connected to the semi-open shell 1 on the same side. Limiting plates 10 are fixedly connected to both ends of the fixed plate 5. A bidirectional screw 8 that is threadedly connected to the two sets of dovetail blocks 9 is rotatably installed between the two sets of limiting plates 10. A worm gear 6 is rotatably installed on the top of the fixed plate 5. A worm wheel 11 that meshes with the worm gear 6 is fixedly sleeved in the middle of the bidirectional screw 8. A handwheel is fixedly connected to the top of the worm gear 6. Rotating the handwheel drives the worm gear 6 to rotate forward, and the worm gear 6 drives the worm wheel 11 to drive the bidirectional screw 8 to rotate. Based on the threaded transmission, the dovetail blocks 9 on both sides are driven to move the semi-open shell 1 onto the gas pipeline. Similarly, when the handwheel is reversed, the semi-open shell 1 moves outward and is separated from the gas pipeline, which facilitates the disassembly and assembly of the semi-open shell 1 and the gas pipeline.

[0029] Working principle: When in use, the detector 2 is used to issue an alarm when a gas leak is detected. The leaked gas is introduced into the gas bag 3 through the gas pipe 4 and collected by the gas bag 3 to prevent the gas from leaking outward and improve the work safety of maintenance personnel. At the gas pipeline leak point, turning the handwheel drives the worm gear 6 to reverse, and the worm gear 6 drives the worm wheel 11 to drive the double-sided lead screw 8 to rotate. Based on the thread transmission, the dovetail blocks 9 on both sides drive the semi-open housing 1 to move outward and detach from the gas pipeline, making it easier for maintenance personnel to perform pipeline maintenance at the gas leak point.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A city underground gas pipeline leakage monitor, comprising a detector (2), characterized in that, It also includes a semi-open shell (1) and a fixed plate (5). Two sets of semi-open shells (1) are fitted at the gas pipeline connection. The two sets of semi-open shells (1) are slidably fitted with the fixed plate (5). The detector (2) is installed on the fixed plate (5). The detection head of the detector (2) passes through the semi-open shell (1). An airbag (3) is fixed on the fixed plate (5). The airbag (3) and the semi-open shell (1) are connected by a gas pipe (4).

2. The urban underground gas pipeline leakage monitor according to claim 1, characterized in that, Sealing strips (7) are adhered to the opposite surfaces of the semi-open shell (1) and the contact surfaces of the semi-open shell (1) and the gas pipeline.

3. The urban underground gas pipeline leakage monitor according to claim 2, characterized in that, The bottom side of the fixed plate (5) is provided with a dovetail groove (501), and dovetail blocks (9) are slidably connected on both sides of the dovetail groove (501). Each set of dovetail blocks (9) is fixedly connected to the semi-open shell (1) on the same side.

4. The urban underground gas pipeline leak detector according to claim 3, characterized in that, The fixed plate (5) is fixedly connected to the two ends of the limiting plate (10), and a bidirectional screw (8) is rotatably installed between the two sets of limiting plates (10) and threadedly connected to the two sets of dovetail blocks (9).

5. The urban underground gas pipeline leakage monitor according to claim 4, characterized in that, The top of the fixed plate (5) is rotatably mounted with a worm gear (6), and the middle of the bidirectional screw (8) is fixedly fitted with a worm wheel (11) that meshes with the worm gear (6).

6. The urban underground gas pipeline leakage monitor according to claim 5, characterized in that, A handwheel is fixedly connected to the top of the worm gear (6).

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