Pipeline leakage detection device

Abstract

The utility model discloses a pipeline leakage detection device. The device comprises a gas collection part sleeving a pipeline; a leakage detection part is vertically arranged at the top of the gas collection part; the leakage detection part is in sealed connection with the gas collection part, communicates with the hollow cavity of the gas collection part and comprises a monitoring pipe and a light piston arranged in the monitoring pipe; the bottom end of the monitoring pipe is connected to the top of the gas collection part and communicates with the hollow cavity, and the top end communicates with the outside; an inflatable sealing ring is arranged between one end of the light piston and the monitoring pipe, and the other end extends out of the top of the monitoring pipe; and the inflatable sealing ring is sleeved on the light piston. According to the gas collecting part provided by the invention, leaked objects at the easy-to-leak part of the pipeline can be gathered in the hollow cavity in time, and enter the monitoring pipe through the hollow cavity, so that the light piston arranged in the monitoring pipe moves relatively along with the change of pressure, and detection personnel can find the leakage problem in time conveniently. The problem that leakage cannot be found in time due to the fact that existing detection equipment is affected by the outside world is solved.

Description

Technical Field

[0001] The present application relates to a pipeline leakage detection device, belonging to the technical field of pipeline monitoring. Background Art

[0002] Pipelines are usually used to transport large quantities of goods such as gas and liquids. They have the advantages of high efficiency, safety, and environmental protection. This method is suitable for long-distance and long-term transportation, such as the transportation of natural gas, oil, water and other resources. During the use of the pipeline, it is necessary to install a leak detection device on it. Although the existing detection device can detect whether the gas is leaking, the existing detection equipment can only detect it when the leakage reaches a certain amount or range. However, when used in a large space, the gas leak cannot be detected in time due to the time required for air circulation, resulting in the staff being unable to discover it in time. Utility Model Content

[0003] In view of this, the present application provides a pipeline leakage detection device to solve the problem that the prior art cannot detect leakage in time. The specific solution is:

[0004] A pipeline leakage detection device comprises: a gas collecting portion sleeved on the outside of the pipeline;

[0005] The gas collecting part is provided with a hollow cavity in contact with the pipeline, a leakage detection part is vertically provided on the top of the gas collecting part, and the gas collecting part is sealed and connected with the pipeline;

[0006] The leakage detection part is sealed and connected to the gas collecting part, and communicated with the hollow cavity, and the leakage detection part includes a monitoring tube and a lightweight piston arranged in the monitoring tube;

[0007] The bottom end of the monitoring tube is vertically connected to the top of the gas collecting part, the top end of the monitoring tube is connected to the outside, and the end of the monitoring tube connected to the gas collecting part is connected to the hollow cavity;

[0008] An inflatable sealing ring is arranged between one end of the lightweight piston and the monitoring tube, and the other end of the lightweight piston extends out of the top of the monitoring tube;

[0009] The inflatable sealing ring is sleeved on the lightweight piston, and moves synchronously with the lightweight piston along the axial direction of the monitoring tube according to the size of the airflow entering the monitoring tube, so as to detect pipeline leakage.

[0010] Preferably, a piercing member is provided on the inner side of one end of the monitoring tube facing away from the gas collecting portion;

[0011] One end of the piercing member is connected to the inner side of the monitoring tube, and the other end of the piercing member is directed toward the end of the monitoring tube connected to the gas collecting part. The piercing member is used to pierce the inflatable sealing ring on the lightweight piston when the gas leakage in the monitoring tube has reached the limit of the gas contained in the monitoring tube and the lightweight piston moves to the top of the monitoring tube.

[0012] Preferably, the lightweight piston is in a T-shaped structure as a whole, and one end of the horizontal portion of the lightweight piston is located outside the top of the monitoring tube.

[0013] Preferably, the gas collecting part comprises a first gas collecting part and a second gas collecting part;

[0014] The axial cross-sections of the first gas collecting part and the second gas collecting part are U-shaped structures, the openings of the first gas collecting part and the second gas collecting part are opposite to each other, respectively located at the upper and lower sides of the pipeline, and are sealed and connected to form a cylindrical structure sleeved outside the pipeline;

[0015] The monitoring pipe is installed on the top of the first gas collecting part.

[0016] Preferably, first sealing members are respectively provided between the two ends of the first air collecting part and the second air collecting part and the pipeline;

[0017] A second sealing member is provided between the first air collecting portion and the second air collecting portion;

[0018] The first sealing member is in an arc shape, and the second sealing member is in a strip shape;

[0019] The first seal is located at two ends of the second seal respectively.

[0020] Preferably, the cross section of the first sealing member is a trapezoidal structure;

[0021] The sides of the first sealing members with smaller cross-sections at both ends of the first air collecting portion and the second air collecting portion are arranged opposite to each other, and the sides of the first sealing members with larger cross-sections are arranged opposite to each other.

[0022] Preferably, fastening devices are provided on the outer sides of both ends of the gas collecting portion;

[0023] The fastening devices are respectively sleeved on the outer sides of the two ends of the gas collecting part, and the fastening devices are used to fix the gas collecting part outside the pipeline.

[0024] Preferably, the monitoring tube is provided with a scale;

[0025] The scale is arranged along the axial direction of the monitoring tube.

[0026] The beneficial effects of this application include:

[0027] The gas collection part provided by the present application can timely collect leaks from the leak-prone parts of the pipeline in the hollow cavity without being affected by the outside world. The leaks collected in the gas collection part enter the monitoring tube from the hollow cavity, causing the pressure in the monitoring tube to change, so that the lightweight piston placed in the monitoring tube moves relative to the pressure change, which is convenient for the detection personnel to find the leakage problem in time. This solves the problem that the existing detection equipment cannot find the leakage in time due to the influence of the outside world. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a front cross-sectional structure of a pipeline leakage detection device of the present application;

[0029] Figure 2 for Figure 1 Sectional view of section B;

[0030] Figure 3 This is a schematic diagram of the connection between a first sealing member and a second sealing member in a pipeline leakage detection device of the present application.

[0031] List of parts and reference numerals:

[0032] 1. Gas collecting part; 2. Monitoring tube; 3. Lightweight piston; 4. Puncture piece; 5. Inflatable sealing ring; 6. Fastening device; 7. First sealing part; 8. Pipeline leakage point; 9. Pipeline; 10. Connecting flange; 11. Bolt assembly; 12. Second sealing part. DETAILED DESCRIPTION

[0033] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0034] According to the attached Figure 1-3 The pipeline leakage detection device shown includes: a gas collecting part 1, and a leakage detection part vertically arranged on the top of the gas collecting part 1 and connected to the gas collecting part 1.

[0035] The gas collecting part 1 is sleeved on the leak-prone part 8 of the pipeline. The gas collecting part 1 is a cylindrical structure, with the two ends of the gas collecting part 1 located on both sides of the leak-prone part 8 of the pipeline, and the inside of the gas collecting part 1 is a hollow cavity, and the leak-prone part 8 of the pipeline is located in the hollow cavity; first sealing members 7 are respectively arranged between the inner sides of the two ends of the gas collecting part 1 and the pipeline 9, and the inner and outer sides of the first sealing member 7 respectively abut against the inner wall of the gas collecting part 1 and the outer wall of the pipeline 9, so as to achieve sealing between the inner sides of the two ends of the gas collecting part 1 and the pipeline 9; the gas collecting part 1 includes a first gas collecting part and a second gas collecting part;

[0036] The axial cross-sections of the first gas collecting part and the second gas collecting part form a U-shaped structure. The openings of the first gas collecting part and the second gas collecting part are opposite to each other and are respectively located at the upper and lower sides of the pipeline 9, and are sealed and connected to form a cylindrical structure sleeved outside the pipeline 9; a second sealing member 12 is provided on the opposite side of the first gas collecting part and the second gas collecting part, and the second sealing member 12 abuts against the opposite side of the first gas collecting part and the second gas collecting part, respectively, to achieve sealing at the connection between the first gas collecting part and the second gas collecting part;

[0037] In one embodiment of the present application, the first gas collecting section of the first gas collecting section and the second gas collecting section is located above the second gas collecting section, and the monitoring tube 2 is installed on the top of the first gas collecting section.

[0038] Fastening devices 6 are provided outside the two ends of the gas collecting part 1, and the fastening devices 6 are respectively sleeved on the outside of the two ends of the gas collecting part 1 to fasten the gas collecting part 1 outside the pipeline 9; in the present application, the fastening device 6 includes but is not limited to a clamp to achieve the ability to fix the gas collecting part 1 outside the pipeline 9.

[0039] Connecting flanges 10 extend outward on the opposite side of the opening and closing part of the clamp. When fixing, the clamp is put on the outside of the air collecting part 1 so that the two connecting flanges 10 are located on the same side, and then the bolt rods in the bolt assembly 11 are respectively passed through the two connecting flanges 10, and then fixed by the nuts in the bolt assembly 11.

[0040] The leakage detection part includes a monitoring tube 2 and a lightweight piston 3, wherein the monitoring tube 2 is vertically arranged on the outside of the top of the gas collecting part 1, one end of the monitoring tube 2 is fixedly connected to the top of the gas collecting part 1, the monitoring tube 2 is a cylindrical structure, one end of the monitoring tube 2 is connected to the hollow cavity of the gas collecting part 1, and the other end of the monitoring tube 2 is connected to the outside; one end of the lightweight piston 3 is inserted into the monitoring tube 2, and the other end of the lightweight piston 3 extends out of the top of the monitoring tube 2 and is located on the outside of the top of the monitoring tube 2. The end of the lightweight piston 3 inserted into the monitoring tube 2 is covered with an inflatable sealing ring 5 to achieve sealing between the lightweight piston 3 and the monitoring tube 2;

[0041] A piercing member 4 is provided on the inner side of the top of the monitoring tube 2. One end of the piercing member 4 is fixedly connected to the inner side of the top of the monitoring tube 2, and the other end of the piercing member 4 is arranged facing forward.

[0042] It should be noted that:

[0043] In the present application, a gap is set between the light piston 3 and the monitoring tube 2 to form a space for accommodating the inflatable sealing ring 5; the light piston 3 is a T-shaped structure as a whole, and the horizontal part of the light piston 3 (the horizontal part of the T-shaped structure is placed on the outer end of the top of the monitoring tube 2) and the vertical part of the light piston 3 are inserted into the monitoring tube 2. Among them, the maximum external expansion size of the horizontal part of the light piston 3 is greater than the outer diameter of the monitoring tube 2, and the horizontal part of the light piston 3 serves as a limiter for the entire light piston 3 to prevent the light piston 3 from being adjusted into the gas collecting chamber; the piercing member 4 serves as a protective member for the light piston 3. When the gas leaked in the monitoring tube 2 exceeds the limit of the monitoring tube 2 (the capacity of the monitoring tube 2 itself), when the light piston 3 is pushed to the top of the monitoring tube 2 by the airflow, the piercing member 4 pierces the inflatable sealing ring 5 toward the end of the monitoring tube 2 connected to the gas collecting part 1. At this time, the light piston 3 is completely separated from the monitoring tube 2 by the continuous air pressure in the monitoring tube 2, avoiding the continuous increase of the air pressure in the monitoring tube 2 and the gas collecting part 1, which may cause danger.

[0044] In the present application, the cross-section of the first sealing member 7 is a trapezoidal structure, wherein the side with a smaller cross-section (i.e., the upper base of the trapezoid) of the first sealing member 7 is relatively arranged (i.e., facing the inside of the gas collecting part 1), and the side with a larger cross-section (the lower base of the trapezoid) of the first sealing member is back-to-back arranged (i.e., facing away from the gas collecting part 1). Since the cross-section of the first sealing member 7 is a trapezoid, the sealing performance of the first and second gas collecting parts is prevented from being affected due to wear, thereby achieving a sealed connection between the gas collecting part 1 and the pipeline 9.

[0045] The first sealing member 7 is in an arc-shaped structure, and the openings of the first sealing members 7 respectively located on the first gas collecting portion and the second gas collecting portion are buckled together to form a full circle;

[0046] The sealing between the first gas collecting part and the second gas collecting part is achieved by the second sealing member 12.

[0047] A sealing groove is correspondingly provided on one side of the first gas collecting part and the second gas collecting part, and the sealing groove and the second sealing member 12 are provided along the extension direction of the first gas collecting part and the second gas collecting part, and have the same length as the first gas collecting part and the second gas collecting part; the second sealing member 12 is located in the sealing groove, and the second sealing member 12 abuts against the first gas collecting part and the second gas collecting part respectively to achieve sealing of the first gas collecting part and the second gas collecting part;

[0048] The first sealing members 7 located at both ends of the first air collecting portion and the second air collecting portion are respectively located at both ends of the second sealing member 12 , and are respectively connected to both ends of the second sealing member 12 .

[0049] In one embodiment of the present application, the lightweight piston 3 is a foam piston; the inflatable sealing ring 5 is an inner inflatable sealing ring 5; the monitoring tube 2 is a transparent rod, and a scale is provided on the monitoring tube 2 along the axial direction; the piercing member 4 is a bent needle with the bend facing the end where the monitoring tube 2 is connected to the gas collecting part 1; the material of the gas collecting part 1 is the same as the material of the pipe 9 to be detected; the monitoring tube 2 is integrally arranged with the gas collecting part 1, and the pipe leakage-prone part 8 is the connection point of two adjacent pipes 9.

[0050] When using this device, first, place the first gas collecting part and the second gas collecting part on both sides of the easy-to-leakage part 8 of the pipeline respectively, so that the two ends of the first gas collecting part and the second gas collecting part are respectively located on both sides of the easy-to-leakage part, the first sealing member 7 is respectively located between the first gas collecting part and the second gas collecting part and the pipeline 9, and the second sealing member 12 is respectively located on the opposite side of the first gas collecting part and the second gas collecting part; then put the clamp on both ends of the first gas collecting part and the second gas collecting part, and fix them by the bolt assembly 11 to realize the installation between the first gas collecting part and the second gas collecting part, and form a completed gas collecting part 1 outside the easy-to-leakage part 8 of the pipeline. When installing, pay attention to the monitoring tube 2 facing vertically upward. Finally, insert the lightweight piston with an inflatable sealing ring into the monitoring tube 2, and then install the piercing member on the inner side of the top of the monitoring tube 2 to complete the installation of this device.

[0051] When there is no leakage in the pipeline 9, the horizontal part of the lightweight piston 3 covers the top of the monitoring tube 2; but when there is a leak in the pipeline 9, the air pressure in the monitoring tube 2 increases, causing the lightweight piston 3 to drive the inflatable sealing ring 5 to move upward synchronously, and a scale is set on the monitoring, so the on-site operator can visually judge whether there is a leak here by observing whether the piston moves. As the amount of gas leaked in the gas collecting cavity and the monitoring tube 2 increases, the air pressure in the monitoring tube 2 continues to increase until the inflatable sealing ring 5 reaches the piercing member 4, the inflatable sealing ring 5 is pierced by the piercing member 4, and the lightweight piston 3 is completely separated from the monitoring tube 2 by the impact of the continuous air pressure in the monitoring tube 2.

[0052] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A pipeline leakage detection device, characterized in that: include: It is installed on the gas collecting part outside the pipeline; The gas collecting part is provided with a hollow cavity in contact with the pipeline, a leakage detection part is vertically provided on the top of the gas collecting part, and the gas collecting part is sealed and connected to the pipeline; The leakage detection part is sealed and connected to the gas collecting part, and is in communication with the hollow cavity. The leakage detection part includes a monitoring tube and a lightweight piston arranged in the monitoring tube; The bottom end of the monitoring tube is vertically connected to the top of the gas collecting part, the top end of the monitoring tube is connected to the outside, and the end of the monitoring tube connected to the gas collecting part is connected to the hollow cavity; An inflatable sealing ring is provided between one end of the lightweight piston and the monitoring tube, and the other end of the lightweight piston extends out of the top of the monitoring tube; The inflatable sealing ring is sleeved on the lightweight piston and moves synchronously with the lightweight piston along the axial direction of the monitoring tube according to the size of the air flow entering the monitoring tube, so as to realize the detection of pipeline leakage.

2. A pipeline leakage detection device according to claim 1, characterized in that: A piercing member is provided on the inner side of one end of the monitoring tube facing away from the gas collecting portion; One end of the puncture member is connected to the inner side of the monitoring tube, and the other end of the puncture member is directed toward the end of the monitoring tube connected to the gas collecting part. The puncture member is used to puncture the inflatable sealing ring on the lightweight piston when the gas leakage in the monitoring tube has reached the limit of the gas contained in the monitoring tube and the lightweight piston moves to the top end of the monitoring tube.

3. A pipeline leakage detection device according to claim 1, characterized in that: The lightweight piston is in a T-shaped structure as a whole, and one end of the horizontal portion of the lightweight piston is located outside the top of the monitoring tube.

4. A pipeline leakage detection device according to claim 1, characterized in that: The gas collecting part includes a first gas collecting part and a second gas collecting part arranged up and down; The first gas collecting part and the second gas collecting part have an axial cross-section that is U-shaped. The first gas collecting part and the second gas collecting part have openings facing each other, are located on the upper and lower sides of the pipeline, and are sealed and connected to form a cylindrical structure that is sleeved outside the pipeline. The monitoring pipe is installed on the top of the first gas collecting part.

5. A pipeline leakage detection device according to claim 4, characterized in that: A first sealing member is provided between both ends of the first gas collecting part and the second gas collecting part and the pipeline respectively; A second sealing member is provided between the first air collecting portion and the second air collecting portion; The first sealing member is in an arc shape, and the second sealing member is in a strip shape; The first seals are respectively located at two ends of the second seal.

6. A pipeline leakage detection device according to claim 5, characterized in that: The cross section of the first sealing member is a trapezoidal structure; The sides of the first sealing members with smaller cross-sections at both ends of the first air collecting portion and the second air collecting portion are arranged opposite to each other, and the sides of the first sealing members with larger cross-sections are arranged opposite to each other.

7. The pipeline leakage detection device according to claim 1, characterized in that: Fastening devices are provided on the outer sides of both ends of the gas collecting portion; The fastening devices are respectively sleeved on the outer sides of both ends of the gas collecting part, and the fastening devices are used to fix the gas collecting part outside the pipeline.

8. The pipeline leakage detection device according to claim 1, characterized in that: The monitoring tube is provided with a scale; The scale is arranged along the axial direction of the monitoring tube.

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