Pipeline air tightness detection device based on air pressure measurement

Abstract

The utility model provides a pipeline air tightness detection device based on air pressure measurement, which comprises a fastening mechanism, mounting racks, arc-shaped sleeves, a sliding rack, clamping plates, a driving mechanism and a barometer, the two mounting racks are sleeved and mounted on a pipeline through the fastening mechanism, the two clamping plates abut against and push the two arc-shaped sleeves through the driving mechanism, and the two arc-shaped sleeves are fixed through the sliding rack. The arc plate on the arc-shaped sleeve is tightly attached to the outer wall of the pipeline and matched with the inner cavity of the arc-shaped sleeve to form the closed annular cavity, the barometer is used for detecting the air pressure change at the annular cavity so as to judge whether the pipeline leaks or not, and the driving mechanism drives the clamping plates to be far away so that the installation frame can be moved at will through the rolling wheels to detect the next position of the pipeline. And the sliding frame is rotated to drive the clamping plate to be away from the arc-shaped sleeve and release the fixing of the fastening mechanism to the mounting frames, so that the two mounting frames can be disassembled, the disassembly and assembly process of the whole device is simplified, meanwhile, the leakage detection work of the pipeline is simplified, convenience is provided for the detection work, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to a pipeline air tightness detection device based on air pressure measurement. Background Art

[0002] Pipelines are widely used in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, water conservancy projects and various industrial devices. In the process of transporting gas, the airtightness of the pipeline is particularly important, otherwise gas leakage will cause losses to users, so it is necessary to regularly detect leaks in the pipeline. For example, a natural gas pipeline flange leak detection auxiliary device disclosed in publication number CN216279906U is installed from both ends of the pipeline to be detected by bolt connection, and cooperates with the natural gas leak alarm to perform pipeline leak detection. However, when this detection method is used to measure multiple locations in the pipeline, it is necessary to disassemble and assemble along the pipeline multiple times to perform leak detection at various locations in the pipeline. The entire disassembly and assembly process is relatively complicated, resulting in low detection efficiency. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies in the above-mentioned technology and to propose a pipeline air tightness detection device based on air pressure measurement, aiming to solve the above-mentioned problems.

[0004] The utility model provides a pipeline air tightness detection device based on air pressure measurement, comprising a fastening mechanism and a mounting frame arranged in pairs, the fastening mechanism is used to sleeve and install the two mounting frames on the pipeline, the mounting frames are provided with rollers for rolling along the pipeline, each mounting frame is movably provided with an arc sleeve, and arc plates are provided at both ends of each arc sleeve, the arc plate is used to be closely attached to the outer wall of the pipeline and cooperate with the inner cavity of the arc sleeve to form a closed annular cavity, a sliding frame is rotatably provided on the mounting frame, two clamping plates are slidably provided on the sliding frame, an abutment portion for the clamping plates to abut, the sliding frame can drive the two clamping plates to approach or move away from the arc sleeve, the sliding frame is provided with a driving mechanism for driving the two clamping plates to move relative to each other, the two clamping plates are used to push the two arc sleeves to drive the two arc sleeves to be tightly sleeved on the pipeline, and a barometer for detecting the air pressure of the annular cavity is provided on the arc sleeve.

[0005] Preferably, the sliding frame is provided with a sliding rod for slidingly installing the two clamps, the driving mechanism includes a driving motor and a rotating rod, the rotating rod is provided with a first threaded portion and a second threaded portion with opposite rotation directions, the two clamps are respectively provided with a first screw hole and a second screw hole, the first threaded portion cooperates with the first screw hole, and the second threaded portion cooperates with the second screw hole.

[0006] Preferably, a latch is movably provided on the mounting frame, and a socket is provided on the sliding frame, and the latch can cooperate with the socket to fix the sliding frame on the mounting frame.

[0007] Preferably, a sealing rubber strip is provided on the periphery of the arc-shaped sleeve.

[0008] Preferably, a mounting plate is provided on the arc-shaped sleeve, and a sliding column for movably mounting the mounting plate is provided on the mounting frame.

[0009] Preferably, a spring is provided on the mounting frame, and the spring can push the mounting plate to drive the arc-shaped sleeve away from the pipeline.

[0010] Preferably, the fastening mechanism comprises a bolt and a nut, and the bolt can cooperate with the nut to sleeve-mount the two mounting brackets on the pipeline.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The two mounting frames are sleeved and mounted on the pipeline by a fastening mechanism, and the whole device can be moved on the pipeline by a roller. The two clamping plates are driven close to the arc sleeve by rotating the sliding frame, and the two clamping plates are pushed against the two arc sleeves by the driving mechanism. The arc plates on the arc sleeve are close to the outer wall of the pipeline and cooperate with the inner cavity of the arc sleeve to form a closed annular cavity. The pressure change in the annular cavity is detected by a barometer to determine whether the pipeline is leaking. The clamping plates are driven away by the driving mechanism, and the mounting frame can be freely moved by the roller to detect the next position of the pipeline. The two mounting frames can be disassembled by rotating the sliding frame to drive the clamping plates away from the arc sleeve and releasing the fixing of the mounting frame by the fastening mechanism, which simplifies the disassembly and assembly process of the whole device and simplifies the leak detection work of the pipeline, provides convenience for the detection work, and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of a certain embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of a mounting frame and a fastening mechanism in a certain embodiment of the utility model;

[0016] Figure 3This is a schematic diagram of the structure of the arc-shaped sleeve and the annular cavity in a certain embodiment of the utility model;

[0017] Figure 4 It is a structural schematic diagram of a driving mechanism in a certain embodiment of the utility model.

[0018] In the figure, 1-pipe; 2-fastening mechanism; 21-bolt; 22-nut; 3-mounting frame; 31-roller; 32-latch pin; 33-sliding column; 34-spring; 4-arc sleeve; 41-arc plate; 42-mounting plate; 5-annular cavity; 6-sliding frame; 61-clamp; 62-sliding rod; 63-jack; 7-driving mechanism; 71-driving motor; 72-rotating rod; 721-first threaded portion; 722-second threaded portion; 8-barometer. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the invention, but it cannot be understood as a limitation on the scope of protection of the invention.

[0020] Embodiment 1:

[0021] Reference Figures 1 to 4 The utility model provides a pipeline 1 air tightness detection device based on air pressure measurement, comprising a fastening mechanism 2 and a pair of mounting frames 3, wherein the fastening mechanism 2 is used to sleeve and mount two mounting frames 3 on the pipeline 1, and the mounting frames 3 are provided with rollers 31 for rolling along the pipeline 1, and each mounting frame 3 is movably provided with an arc sleeve 4, and each arc sleeve 4 is provided with arc plates 41 at both ends, and the arc plates 41 are used to be closely attached to the outer wall of the pipeline 1 and cooperate with the inner cavity of the arc sleeve 4 to form a closed annular cavity 5, A sliding frame 6 is rotatably arranged on the mounting frame 3, and two clamping plates 61 are slidably arranged on the sliding frame 6. An abutting portion for the clamping plates 61 to abut is arranged on the arc sleeve 4. The sliding frame 6 can drive the two clamping plates 61 to approach or move away from the arc sleeve 4. A driving mechanism 7 for driving the two clamping plates 61 to move relative to each other is arranged on the sliding frame 6. The two clamping plates 61 are used to push the two arc sleeves 4 to drive the two arc sleeves 4 to be tightly sleeved on the pipeline 1. A barometer 8 for detecting the air pressure of the annular cavity 5 is arranged on the arc sleeve 4.

[0022] The two mounting frames 3 are sleeved and mounted on the pipeline 1 by the fastening mechanism 2, and the whole device can be moved on the pipeline 1 by the roller 31, and the two clamping plates 61 are driven to approach the arc sleeve 4 by rotating the sliding frame 6, and the two clamping plates 61 are pushed against the two arc sleeves 4 by the driving mechanism 7, so that the arc plates 41 on the two arc sleeves 4 are close to the outer wall of the pipeline 1 and cooperate with the inner cavity of the arc sleeve 4 to form a closed annular cavity 5, and the pressure gauge 8 is used to detect the air pressure change in the annular cavity 5 to determine whether the pipeline 1 at that location is leaking, and the clamping plates 61 are driven away by the driving mechanism 7. The mounting frame 3 can be moved at will by the roller 31 to detect the next position of the pipeline 1, and the two mounting frames 3 can be disassembled by rotating the sliding frame 6 to drive the clamping plates 61 away from the arc sleeve 4 and releasing the fixing of the mounting frame 3 by the fastening mechanism 2, which simplifies the disassembly and assembly process of the whole device and simplifies the leak detection work of the pipeline 1, provides convenience for the detection work, and improves the detection efficiency.

[0023] Specifically, the sliding frame 6 is provided with a sliding rod 62 for slidingly installing two clamps 61, the driving mechanism 7 includes a driving motor 71 and a rotating rod 72, the rotating rod 72 is provided with a first threaded portion 721 and a second threaded portion 722 with opposite rotation directions, and the two clamps 61 are respectively provided with a first screw hole and a second screw hole, the first threaded portion 721 cooperates with the first screw hole, and the second threaded portion 722 cooperates with the second screw hole.

[0024] When the driving motor 71 drives the rotating rod 72 to rotate, the rotating rod 72 cooperates with the first screw hole and the second screw hole respectively through the first threaded portion 721 and the second threaded portion 722 to drive the two clamps 61 to move closer to or away from each other. When the two clamps 61 move closer to each other, they can respectively push the two arc sleeves 4 to drive the arc plates 41 on the two arc sleeves 4 to fit tightly against the outer wall of the pipeline 1 and cooperate with the inner cavity of the arc sleeve 4 to form a closed annular cavity 5, which is convenient for leak detection of the pipeline 1 at this location; when the two clamps 61 move away from each other, the locking state of the two arc sleeves 4 can be released, which is convenient for moving or disassembling the two mounting frames 3.

[0025] Embodiment 2:

[0026] Reference Figures 1 to 4 Combined with the technical solution of Example 1, in this embodiment, a pin 32 is movably provided on the mounting frame 3, and a socket 63 is provided on the sliding frame 6. The pin 32 can cooperate with the socket 63 to fix the sliding frame 6 on the mounting frame 3.

[0027] The sliding frame 6 is fixed by moving the latch pin 32 to drive the clamping plates 61 to align with the abutting portion on the arc-shaped sleeve 4 , so that the two clamping plates 61 push the two arc-shaped sleeves 4 to form a closed annular cavity 5 .

[0028] Specifically, a sealing rubber strip is arranged on the periphery of the arc sleeve 4. By arranging the sealing rubber strip on the arc sleeve 4 to fill the gap between the arc sleeve 4 and the pipeline 1, the sealing performance of the annular cavity 5 is improved, thereby improving the accuracy of the pipeline 1 detection work.

[0029] Embodiment 3:

[0030] Reference Figures 1 to 4 Combining the technical solutions of Example 1 and Example 2, in this embodiment, a mounting plate 42 is provided on the arc sleeve 4, and a sliding column 33 for movably installing the mounting plate 42 is provided on the mounting frame 3.

[0031] Specifically, a spring 34 is provided on the mounting frame 3 , and the spring 34 can push the mounting plate 42 to drive the arc sleeve 4 away from the pipeline 1 .

[0032] When the driving mechanism 7 drives the two clamping plates 61 to move away from each other, under the action of the spring 34, the two arc sleeves 4 move away from each other, releasing the tight state between the arc plate 41 and the pipeline 1, eliminating the friction between the arc plate 41 and the outer wall of the pipeline 1, and facilitating the movement of the mounting frame 3 to the next detection position for leak detection.

[0033] Specifically, the fastening mechanism 2 includes a bolt 21 and a nut 22 . The bolt 21 can cooperate with the nut 22 to sleeve and install the two mounting frames 3 on the pipeline 1 .

[0034] The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present invention by using the above technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A pipeline air tightness detection device based on air pressure measurement, characterized in that: The cam is provided with a plurality of rollers for rolling along the pipe, and each of the plurality of rollers is provided with a plurality of rollers for rolling along the pipe.

2. A pipeline air tightness detection device based on air pressure measurement according to claim 1, characterized in that: The sliding frame is provided with a sliding rod for slidingly installing the two clamps, the driving mechanism includes a driving motor and a rotating rod, the rotating rod is provided with a first threaded portion and a second threaded portion with opposite rotation directions, the two clamps are respectively provided with a first screw hole and a second screw hole, the first threaded portion cooperates with the first screw hole, and the second threaded portion cooperates with the second screw hole.

3. A pipeline air tightness detection device based on air pressure measurement according to claim 1, characterized in that: The mounting frame is movably provided with a latch pin, and the sliding frame is provided with a socket. The latch pin can cooperate with the socket pin to fix the sliding frame on the mounting frame.

4. The pipeline air tightness detection device based on air pressure measurement according to claim 1, characterized in that: A sealing rubber strip is arranged on the periphery of the arc-shaped sleeve.

5. The pipeline air tightness detection device based on air pressure measurement according to claim 1, characterized in that: The arc-shaped sleeve is provided with a mounting plate, and the mounting frame is provided with a sliding column for movably mounting the mounting plate.

6. A pipeline air tightness detection device based on air pressure measurement according to claim 5, characterized in that: The mounting frame is provided with a spring, and the spring can push the mounting plate to drive the arc sleeve away from the pipeline.

7. The pipeline air tightness detection device based on air pressure measurement according to claim 1, characterized in that: The fastening mechanism comprises a bolt and a nut, and the bolt can cooperate with the nut to sleeve and install the two mounting frames on the pipeline.

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