Pressure tapping pipeline for broken pipe detection system

Abstract

The utility model discloses a pressure tapping pipeline for a broken pipe detection system, and belongs to the technical field of gas conveying pipelines. The pressure tapping pipeline comprises a pressure sensor and a compound valve group, the pressure inlet end of the compound valve group is communicated with a gas transmission main line through a pressure guide pipe, and the pressure outlet end of the compound valve group is communicated with the pressure inlet end of the pressure sensor; and a pressure relief opening is formed in the compound valve bank to relieve the pressure in the pressure guide pipe. According to the pressure tapping pipeline for the broken pipe detection system, the compound valve set with the pressure relief function is additionally arranged on the pressure guide pipe, the pressure of the pressure guide pipe can be relieved on line without disassembly, the risks of part damage and medium leakage caused by disassembly are effectively avoided, the verification disassembly recovery time of the pressure sensor is effectively shortened, and the detection efficiency is improved. Time consumed for single-time disassembly and recovery is saved by 88%, and meanwhile the operation risk is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas transmission pipelines, and particularly relates to a pressure-taking pipeline for a pipe break detection system. Background Art

[0002] The pipe break detection system is developed to ensure the absolute safety of natural gas supply. This system can monitor the integrity of natural gas pipelines in real time, continuously monitor the pressure of natural gas pipelines, and send corresponding signals to the actuator when an accident occurs, driving the valve to a safe position. The pipe break detection system can monitor the integrity of natural gas pipelines in real time, continuously monitor the pressure of natural gas pipelines, and send corresponding signals to the actuator when an accident occurs, driving the valve to a safe position.

[0003] The pipe break detection system uses pressure and pressure drop rate as control parameters. When the pipeline leaks or bursts, causing the pipeline pressure to exceed the limit value or the pressure drop rate to be greater than the limit value and reach a certain delay time, the pipe break detection system will drive the valve to automatically enter the shut-off state and close the upstream and downstream block valves. The settings of the pressure limit value and pressure drop rate limit value of the pipe break detection system directly affect the effectiveness of the pipe break detection system in exerting its safety function.

[0004] The pipe break detection system needs to obtain pressure detection values through a pressure-taking pipeline. The existing pressure-taking pipeline is connected to the main pipeline through a pressure sensor, which has the problems of long time-consuming for calibration and disassembly of the pressure sensor, and is prone to component damage and medium leakage due to disassembly. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a pressure-taking pipeline for a pipe break detection system to solve the problem of long time-consuming for calibration and disassembly of the pressure sensor in the existing pipe break detection system.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] The utility model provides a pressure-taking pipeline for a pipe break detection system, including: a pressure sensor and a compound valve group. The inlet pressure end of the compound valve group is connected to the gas transmission main line through a pressure guiding pipe, and the outlet pressure end of the compound valve group is connected to the inlet pressure end of the pressure sensor;

[0008] A pressure relief port is provided on the compound valve group to relieve the pressure in the pressure guiding pipe.

[0009] Further, in the pressure-taking pipeline for the pipe breakage detection system, the compound valve group includes: a valve group body. A pressure-taking port for connecting with the pressure guiding pipe is arranged at the pressure inlet end of the valve group body. A pressure outlet port for connecting with the pressure sensor is arranged at the pressure outlet end of the valve group body. A pressure guiding channel is arranged inside the valve group body, and both ends of the pressure guiding channel are communicated with the pressure-taking port and the pressure outlet port of the valve group body respectively;

[0010] Main control valves and auxiliary control valves are correspondingly installed on both sides of the valve group body, and both the main control valve and the auxiliary control valve are communicated with the pressure guiding channel.

[0011] Further, in the pressure-taking pipeline for the pipe breakage detection system, a pressure relief port is arranged on the valve group body. The pressure relief port is arranged close to the pressure outlet port of the valve group body. A pressure relief channel is arranged inside the valve group body, and both ends of the pressure relief channel are communicated with the auxiliary control valve and the pressure relief port respectively.

[0012] Further, in the pressure-taking pipeline for the pipe breakage detection system, the axis of the pressure guiding channel is arranged parallel to the axis of the pressure relief channel.

[0013] Further, in the pressure-taking pipeline for the pipe breakage detection system, the pressure outlet port of the valve group body is connected with the pressure inlet port of the pressure sensor through a union joint.

[0014] Further, in the pressure-taking pipeline for the pipe breakage detection system, a short connector is also connected between the valve group body and the pressure sensor. The pressure outlet port of the valve group body and the pressure inlet port of the pressure sensor are connected with both ends of the short connector through union joints.

[0015] Further, in the pressure-taking pipeline for the pipe breakage detection system, the pressure-taking pipeline further includes: a multi-stage cut-off valve, and the cut-off valve is arranged on the pressure guiding pipe.

[0016] Further, in the pressure-taking pipeline for the pipe breakage detection system, both the pressure inlet port and the pressure outlet port of the cut-off valve are connected with the pressure guiding pipe through union joints.

[0017] Further, in the pressure-taking pipeline for the pipe breakage detection system, the pressure-taking pipeline further includes: a filter element. The filter element includes a filter body, and a filter screen is arranged inside the filter body. The mesh surface of the filter screen is perpendicular to the pressure guiding pipe;

[0018] The pressure outlet port of the filter body is connected with the pressure inlet port of the valve group body by screw threads.

[0019] Furthermore, in the pressure-taking pipeline for the pipe break detection system, the pressure-taking pipeline further includes: a system control box, and the system control box is connected to the pressure outlet of the pressure sensor through a circuit.

[0020] The utility model has the following beneficial effects:

[0021] The pressure-taking pipeline for the pipe break detection system provided by the utility model adds a compound valve group with pressure relief to the pressure guiding pipe, and can relieve the pressure of the pressure guiding pipe online without disassembly, effectively avoiding the risks of component damage and medium leakage caused by disassembly, effectively shortening the calibration disassembly and recovery time of the pressure sensor, saving 88% of the time consumed for single disassembly and recovery, and at the same time effectively reducing the operation risk. Description of the Drawings

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the utility model, form a part of this application, and do not limit the embodiments of the utility model. In the drawings:

[0023] Figure 1 is a schematic structural diagram of the pressure-taking pipeline for the pipe break detection system of the utility model;

[0024] Figure 2 is a schematic partial structural diagram of the pressure-taking pipeline for the pipe break detection system of the utility model;

[0025] Figure 3 is a schematic structural diagram of the compound valve group in the pressure-taking pipeline for the pipe break detection system of the utility model;

[0026] Figure 4 is a schematic structural diagram of the filter element in the pressure-taking pipeline for the pipe break detection system of the utility model.

[0027] Marks in the drawings and corresponding component names:

[0028] In the figure: 1 - gas transmission main line, 10 - pressure sensor, 17 - union joint, 20 - pressure guiding pipe, 30 - valve group body, 31 - pressure guiding channel, 34 - main control valve, 35 - auxiliary control valve, 36 - pressure relief port, 37 - pressure relief channel, 40 - union, 50 - short connector, 60 - cut-off valve, 70 - filter body, 71 - filter screen, 80 - system control box. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0031] Embodiment

[0032] Please refer to Figures 1-4 , the pressure-taking pipeline for the pipe-breaking detection system provided by the embodiment of the present utility model includes: a pressure sensor 10 and a compound valve group. The inlet pressure end of the compound valve group is connected to the gas transmission main line through a pressure guiding pipe 20, and the outlet pressure end of the compound valve group is connected to the inlet pressure end of the pressure sensor 10;

[0033] A pressure relief port 36 is provided on the compound valve group to relieve the pressure in the pressure guiding pipe 20.

[0034] The pressure-taking pipeline for the pipe-breaking detection system provided by the present utility model, by adding a compound valve group with pressure relief to the pressure guiding pipe 20, can relieve the pressure in the pressure guiding pipe 20 online without disassembly, effectively avoiding the risk of component damage and medium leakage caused by disassembly, effectively shortening the calibration disassembly and recovery time of the pressure sensor 10, saving 88% of the time-consuming for single disassembly and recovery, and at the same time effectively reducing its operation risk.

[0035] In some feasible ways, the compound valve group includes: a valve group body 30. The inlet pressure end of the valve group body 30 is provided with a pressure-taking port for connecting with the pressure guiding pipe 20, the outlet pressure end of the valve group body 30 is provided with an outlet pressure port for connecting with the pressure sensor 10, and a pressure guiding channel 31 is arranged in the valve group body 30. The two ends of the pressure guiding channel 31 are respectively communicated with the pressure-taking port of the valve group body 30 and the outlet pressure port of the valve group body 30;

[0036] The main control valve 34 and the auxiliary control valve 35 are correspondingly installed on both sides of the valve group body 30, and both the main control valve 34 and the auxiliary control valve 35 are communicated with the pressure guiding channel 31.

[0037] In the compound valve group, the main control valve 34 is used to control the main flow rate of the fluid in the pressure guiding channel 31. According to the changes in the requirements of the pipe break detection system, it can be opened, closed or adjusted to control the flow rate and pressure of the fluid. The auxiliary control valve 35 is used to assist the control of the main control valve 34 to achieve the function of discharging pressure.

[0038] In some feasible ways, a pressure relief port 36 is provided on the valve group body 30. The pressure relief port 36 is arranged close to the pressure outlet of the valve group body 30. A pressure relief channel 37 is provided in the valve group body 30. Both ends of the pressure relief channel 37 are respectively communicated with the auxiliary control valve 35 and the pressure relief port 36. By providing the pressure relief channel 37 on the valve group body 30 to achieve pressure relief, the auxiliary control valve 35 is used for pressure relief operation. A pressure relief channel 37 is also provided to facilitate the pressure relief of the auxiliary control valve 35. A plug is installed on the pressure relief port 36. When performing pressure relief, by externally screwing the plug, the auxiliary control valve 35 is activated to transfer the pressure to the pressure relief port 36 through the pressure relief channel 37 to achieve pressure relief and ensure the safety of the operation.

[0039] In some feasible ways, the axis of the pressure guiding channel 31 is arranged parallel to the axis of the pressure relief channel 37. In this way, the pressure guiding channel 31 and the pressure relief channel 37 are communicated, and the pressure transfer is easier.

[0040] In some feasible ways, the pressure outlet of the valve group body 30 is connected to the pressure inlet of the pressure sensor 10 through a union joint 40. The setting of the union joint 40 facilitates disassembly, avoids the risk of easy cable breakage during disassembly, and reduces the operation of restoring cable wiring.

[0041] In some feasible ways, a short connector 50 is also connected between the valve group body 30 and the pressure sensor 10. The pressure outlet of the valve group body 30 and the pressure inlet of the pressure sensor 10 are connected to both ends of the short connector 50 through the union joint 40. The setting of the short connector 50 is used to create a closed test environment for more rapid pressure testing. Only a short pipe with a simple structure is required, and no other structures need to be added. Through the short connection of the short connector 50, the pressure applied during the test can be more easily controlled, the test environment is more closed, and it will not be interfered by external factors.

[0042] In some feasible ways, the pressure taking pipeline further includes: a multi-stage shut-off valve 60, and the shut-off valve 60 is arranged on the pressure guiding pipe 20. The shut-off valve 60 has multiple stages. The flow of the fluid is controlled by opening or closing the shut-off valve 60. In this embodiment, the shut-off valve 60 has two stages. The first-stage shut-off valve 60 is arranged on the pressure guiding pipe 20 close to the gas transmission main line to control the initial pressure of the fluid entering the pressure taking pipeline. The second-stage shut-off valve 60 is arranged on the pressure guiding pipe 20 close to the compound valve group to control the initial pressure of the fluid entering the compound valve group.

[0043] In some feasible ways, both the inlet pressure port of the shut-off valve 60 and the outlet pressure port of the shut-off valve 60 are connected to the union 17 of the pressure guiding pipe 20. The shut-off valve 60 has a union section and a light column section adapted to the pressure guiding pipe 20. The shut-off valve 60 is connected to the pressure guiding pipe 20 through the union 17, and the installation and disassembly of the shut-off valve 60 connected by the union 17 are more convenient.

[0044] In some feasible ways, the pressure tapping pipeline further includes: a filter element, the filter element includes a filter body 70, a filter screen 71 is arranged inside the filter body 70, and the mesh surface of the filter screen 71 is perpendicular to the pressure guiding pipe 20;

[0045] The outlet pressure port of the filter body 70 is threadedly connected to the inlet pressure port of the valve group body 30.

[0046] The setting of the filter element is used to filter impurities, solid particles or other bad substances in the fluid entering the compound valve group, ensure the cleanliness and purity of the fluid, prevent impurities or particles from entering the compound valve group and the pipeline system, so as to protect the compound valve group and the pipeline system from pollution or damage, thereby reducing the wear and blockage of the compound valve group, and improving the operation efficiency and reliability of the system.

[0047] In some feasible ways, the pressure tapping pipeline further includes: a system control box 80, and the system control box 80 is connected to the outlet pressure port of the pressure sensor 10 through a circuit. The system control box 80 is used to realize the start or close of the valve and the data acquisition of the pressure sensor 10.

[0048] The above specific implementation manners further elaborate the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above is only the specific implementation manners of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure-taking pipeline for a pipe break detection system, characterized in that: include: A pressure sensor (10) and a compound valve group, wherein the pressure inlet end of the compound valve group is connected to a gas transmission trunk line via a pressure guide pipe (20), and the pressure outlet end of the compound valve group is connected to the pressure inlet end of the pressure sensor (10); The compound valve assembly is provided with a pressure relief port (36) for releasing the pressure in the pressure guiding pipe (20).

2. The pressure-taking pipeline for a pipe break detection system according to claim 1, characterized in that: The compound valve group comprises: a valve group body (30), a pressure-inlet end of the valve group body (30) is provided with a pressure-taking port for connecting to the pressure-guiding pipe (20), a pressure-outlet end of the valve group body (30) is provided with a pressure-outlet port for connecting to the pressure sensor (10), a pressure-guiding channel (31) is provided inside the valve group body (30), and two ends of the pressure-guiding channel (31) are respectively connected to the pressure-taking port of the valve group body (30) and the pressure-outlet port of the valve group body (30); A main control valve (34) and an auxiliary control valve (35) are correspondingly installed on both sides of the valve group body (30), and both the main control valve (34) and the auxiliary control valve (35) are in communication with the pressure-conducting channel (31).

3. The pressure-taking pipeline for a pipe break detection system according to claim 2, characterized in that: The valve group body (30) is provided with a pressure relief port (36), and the pressure relief port (36) is arranged close to the pressure outlet of the valve group body (30). The valve group body (30) is provided with a pressure relief channel (37), and the two ends of the pressure relief channel (37) are respectively connected to the auxiliary control valve (35) and the pressure relief port (36).

4. The pressure-taking pipeline for a pipe break detection system according to claim 3, characterized in that: The axis of the pressure-conducting channel (31) is arranged parallel to the axis of the pressure-relieving channel (37).

5. The pressure-taking pipeline for a pipe break detection system according to claim 2, characterized in that: The pressure outlet of the valve group body (30) is connected to the pressure inlet of the pressure sensor (10) via a flexible joint (40).

6. The pressure-taking pipeline for a pipe break detection system according to claim 2, characterized in that: A short-circuit (50) is also connected between the valve group body (30) and the pressure sensor (10), and the pressure outlet of the valve group body (30) and the pressure inlet of the pressure sensor (10) are connected to two ends of the short-circuit (50) via a flexible joint (40).

7. The pressure-taking pipeline for a pipe break detection system according to claim 2, characterized in that: The pressure-taking pipeline further comprises: a multi-stage cut-off valve (60), wherein the cut-off valve (60) is arranged on the pressure-conducting pipe (20).

8. The pressure-taking pipeline for a pipe break detection system according to claim 7, characterized in that: The pressure inlet of the cut-off valve (60) and the pressure outlet of the cut-off valve (60) are both connected to the pressure-conducting pipe (20) via a slipknot (17).

9. The pressure-taking pipeline for a pipe break detection system according to claim 2, characterized in that: The pressure-taking pipeline further comprises: a filter element, the filter element comprising a filter body (70), a filter screen (71) being arranged inside the filter body (70), and a mesh surface of the filter screen (71) being perpendicular to the pressure-conducting pipe (20); The pressure outlet of the filter body (70) is threadedly connected to the pressure inlet of the valve group body (30).

10. The pressure-taking pipeline for a pipe break detection system according to claim 1, characterized in that: The pressure-taking pipeline further comprises: a system control box (80), and the system control box (80) is connected to the pressure outlet of the pressure sensor (10) via a line.

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