Buried polyethylene pipeline electric fusion welding port leakage monitoring device

Abstract

The invention provides a buried polyethylene pipeline electric fusion welding port leakage monitoring device, and belongs to the technical field of pipeline systems.The buried polyethylene pipeline electric fusion welding port leakage monitoring device comprises an electric fusion pipe fitting, and the electric fusion pipe fitting can be arranged on a buried polyethylene pipeline in a sleeving mode; an electric heating wire is arranged on the inner surface of the electric melting pipe fitting, a detection area is arranged between the end of the electric melting pipe fitting and the electric heating wire, and an annular groove is formed in the position, in the detection area, of the inner surface of the electric melting pipe fitting. A leakage sensing sensor and a position information memory are arranged in the annular groove, and the leakage sensing sensor and the position information memory are respectively connected with the pipeline local area network through signal lines; wherein when a certain welded junction leaks, after the leakage sensing sensor collects a leakage signal, the position information storage uploads position information to the control center monitoring platform through the pipeline local area network so as to display the position information of a leakage point; when leakage occurs, an operator can conveniently know the leakage position in time, and then the operator can conveniently handle the leakage in time.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline systems, and in particular relates to a leakage monitoring device for electric fusion welds of buried polyethylene pipelines. Background Art

[0002] In the prior art, electric fusion welding of buried polyethylene pipes is a welding method in which a resistance wire pre-buried in the inner surface of the electric fusion pipe is energized and heated, so that the material on the inner surface of the electric fusion pipe and the outer surface of the socket pipe reaches the melting temperature, the heated material expands to generate welding pressure, and the molecules are transferred, diffused, entangled, and cooled to fuse together. The quality of electric fusion welding is affected by many factors during the construction process, such as personnel operation, welding equipment, welding materials, and ambient temperature. During the use of polyethylene pipes, leakage is prone to occur at the electric fusion weld. When leakage occurs at the electric fusion weld of the polyethylene pipe, maintenance personnel cannot obtain the location of the leakage point in time. Summary of the invention

[0003] The embodiment of the present invention provides a buried polyethylene pipeline electric fusion weld leakage monitoring device, which aims to solve the technical problem in the prior art that the leakage location cannot be known in time when a buried polyethylene pipeline leaks, so that an automatic monitoring system is formed from the leaking weld, pipeline to the pipeline network detection center, so as to achieve the purposes of detection, early warning, positioning and active prevention.

[0004] To achieve the above object, the technical solution adopted by the present invention is: Provided is a buried polyethylene pipeline electrofusion weld leakage monitoring device, comprising an electrofusion pipe fitting, wherein the electrofusion pipe fitting can be sleeved on the buried polyethylene pipeline; The inner surface of the electric fusion pipe is provided with a heating wire, and both ends of each section of the heating wire are electrically connected to a terminal, and one end of the terminal is located outside the electric fusion pipe; A detection area is formed between the end of the electrofusion pipe and the electric heating wire, and an annular groove is provided on the inner surface of the electrofusion pipe at the position of the detection area; A leakage sensing sensor and a position information storage device are provided in the annular groove, and the leakage sensing sensor and the position information storage device are respectively connected to the pipeline local area network through signal lines; Among them, when a leak occurs in a weld, the leak sensing sensor collects the leak signal, and the location information storage device uploads the location information to the control center monitoring platform through the pipeline LAN to display the location information of the leak point.

[0005] In a possible implementation, the leakage sensing sensor includes one or more of a harmful gas concentration sensor, a combustible gas sensor, a pressure sensor, an odor sensor, and a temperature sensor.

[0006] In a possible implementation, annular grooves are provided on the inner wall of the electrofusion pipe near both ends, and a channel for connecting the two annular grooves is provided inside the side wall of the electrofusion pipe; the leakage sensing sensor and the position information storage device are both provided in one of the annular grooves.

[0007] In a possible implementation, annular grooves are provided on the inner wall of the electrofusion pipe near both ends, and a channel for connecting the two annular grooves is provided inside the side wall of the electrofusion pipe; a leakage sensing sensor is provided in one of the annular grooves, and a position information storage device is provided in the other annular groove.

[0008] In a possible implementation manner, a sealing structure is provided at the end of the electrofusion pipe.

[0009] In a possible implementation, the electrofusion pipe fitting includes an electrofusion sleeve, an electrofusion tee, an electrofusion elbow, an electrofusion reducer and an electrofusion end cap.

[0010] In a possible implementation, the leakage monitoring device further includes a signal indication structure, which is connected to the pipeline local area network via a signal line; the signal indication structure is located on the ground surface.

[0011] In a possible implementation manner, the signal indication structure includes: A support frame, arranged at the position of the electric fusion pipe fitting; A storage box is arranged on the top of the support frame; a signal light is arranged in the storage box, and a light-transmitting plate is detachably arranged on the top of the storage box; a cable connected to the pipeline LAN is arranged on the storage box, and one end of the cable located in the storage box has a working interface connected to the signal light; After the buried polyethylene pipe is buried, the light-transmitting plate on the top of the containing box is in the same plane as the ground surface.

[0012] In a possible implementation, a test interface is provided on the light-transmitting plate, and the signal light is connected to the test interface via a cable; a sealing cover is provided on the top of the light-transmitting plate at the position of the test interface.

[0013] In a possible implementation, a limit frame is provided on the inner peripheral wall of the containing box near the top, the light-transmitting plate is plugged into the containing box, and the bottom of the light-transmitting plate contacts the limit frame; wherein a seal is provided on the outer peripheral wall of the light-transmitting plate.

[0014] The present invention provides a buried polyethylene pipeline electric fusion weld leakage monitoring device. Compared with the prior art, when a weld leaks, the medium in the pipeline will enter the annular groove from the outer wall of the buried polyethylene pipeline, and the leakage sensing sensor in the annular groove can detect the medium entering the annular groove; after the leakage sensing sensor collects the leakage signal, the position information storage device uploads the position information to the control center monitoring platform through the pipeline local area network, and the monitoring center control platform can display the position information of the leakage point, so as to achieve the purpose of timely alarm when leakage occurs, and can realize the purpose of synchronous display of the leakage point position. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a buried polyethylene pipe electric fusion weld leakage monitoring device provided by an embodiment of the present invention in an underground state; Figure 2 A schematic diagram of a buried polyethylene pipeline electric fusion weld leakage monitoring device provided by an embodiment of the present invention; Figure 3 for Figure 2 The enlarged schematic diagram of the middle A part; Figure 4 A cross-sectional view of a buried polyethylene pipeline electric fusion weld leakage monitoring device provided by an embodiment of the present invention; Figure 5 A schematic diagram of a support frame portion of a buried polyethylene pipeline electrofusion weld leakage monitoring device provided by an embodiment of the present invention; Figure 6 for Figure 5 The enlarged schematic diagram of the middle part B; Figure 7 for Figure 6 The enlarged schematic diagram of the middle C part; Figure 8 A schematic diagram of a light-transmitting plate portion of a buried polyethylene pipeline electric fusion weld leakage monitoring device provided by an embodiment of the present invention; Fig. 9 for Figure 8 The enlarged schematic diagram of the middle D part; Fig.10 A schematic diagram of a sealing chamber portion of a buried polyethylene pipeline electric fusion weld leakage monitoring device provided by an embodiment of the present invention; Fig.11 A schematic diagram of the longitudinal groove portion of the annular groove box of a buried polyethylene pipeline electric fusion weld leakage monitoring device provided by an embodiment of the present invention; Fig.12 A schematic diagram of a clamp of a buried polyethylene pipeline electrofusion weld leakage monitoring device provided by an embodiment of the present invention being installed on an electrofusion pipe fitting.

[0016] Explanation of the reference numerals in the accompanying drawings: 1. Electric fusion pipe fitting; 11. Heating wire; 12. Terminal; 13. Annular groove; 131. Channel; 14. End cover; 15. Annular groove; 16. Longitudinal groove; 17. Sealing chamber; 2. Buried polyethylene pipe; 3. Signal indication structure; 31. Receiving box; 32. Signal light; 33. Sealing cover plate; 34. Support frame; 35. Light-transmitting plate; 351. Groove; 352. Lifting groove; 353. Protrusion; 36. Limiting frame; 37. Support column; 38. Positioning cylinder; 39. Arc plate; 4. Clamp. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] Please also read Figures 1 to 12 , now a buried polyethylene pipeline electric fusion weld leakage monitoring device provided by the present invention is described. The buried polyethylene pipeline electric fusion weld leakage monitoring device comprises an electric fusion pipe fitting 1, which can be sleeved on a buried polyethylene pipeline 2; the inner peripheral wall of the electric fusion pipe fitting 1 has an electric heating wire 11, and both ends of each section of the electric heating wire 11 are electrically connected to a terminal 12, and one end of the terminal 12 is located outside the electric fusion pipe fitting 1; a detection area is formed between the end of the electric fusion pipe fitting 1 and the electric heating wire 11, and the inner peripheral wall of the electric fusion pipe fitting 1 has an annular groove 13 at the position of the detection area; a leakage sensing sensor and a position information storage are arranged in the annular groove 13, and the leakage sensing sensor and the position information storage are respectively connected to the pipeline local area network through a signal line; wherein, when a certain weld leaks, after the leakage sensing sensor collects the leakage signal, the position information storage uploads the position information to the control center monitoring platform through the pipeline local area network to display the position information of the leakage point.

[0019] Compared with the prior art, the buried polyethylene pipeline leakage monitoring device provided by the present invention has the following advantages: when a certain weld leaks, the medium in the pipeline will enter the annular groove 13 from the outer peripheral wall of the buried polyethylene pipeline 2, and the leakage sensing sensor in the annular groove 13 can detect the medium entering the annular groove 13; after the leakage sensing sensor collects the leakage signal, the position information storage device uploads the position information to the control center monitoring platform through the pipeline local area network, and the monitoring center control platform can display the position information of the leakage point, so as to achieve the purpose of timely alarm when leakage occurs, and can realize the purpose of synchronous display of the leakage point position. The power supply line of the leakage sensing sensor and the position information storage device is the prior art, which will not be described in detail here.

[0020] Exemplarily, the leakage sensing sensor includes one or more of a harmful gas concentration sensor, a combustible gas sensor, a pressure sensor, an odor sensor, and a temperature sensor. The selection of the leakage sensing sensor needs to be determined according to the working conditions such as the conveying medium and pressure level of the pipeline.

[0021] Exemplarily, taking the leakage sensing sensor as a pressure sensor as an example, the cable connecting the pressure sensor and the position information storage device is laid along the length direction of the buried polyethylene pipeline 2; the pipeline local area network reflects the specific information of each pipeline, and the pipeline monitoring center screen displays the monitoring information of all pipelines. The principle of the wired transmission method is the existing technology and will not be repeated here.

[0022] It should be noted that the leakage sensing sensor is selected according to actual conditions. When the temperature of the medium in the buried polyethylene pipe is higher than normal temperature or lower than normal temperature, the leakage sensing sensor can be a temperature sensor or a pressure sensor, or both the temperature sensor and the pressure sensor can be set in the annular groove.

[0023] In addition, within the scope permitted by actual conditions, a plurality of sensors of different types may be arranged in the annular groove 13 to monitor the electric fusion weld from multiple angles.

[0024] In some embodiments, Figures 1 to 12 As shown, annular grooves 13 are provided on the inner wall of the electric fusion pipe fitting 1 near both ends, and a channel 131 is provided inside the side wall of the electric fusion pipe fitting 1 for connecting the two annular grooves 13; wherein, the leakage sensing sensor and the position information storage device can both be provided in one of the annular grooves 13, and the leakage sensing sensor and the position information storage device can also be provided in two annular grooves 13 respectively.

[0025] Take the example that the leakage sensing sensor and the position information storage device are both arranged in one of the annular grooves 13 for explanation; when leakage occurs in the electric fusion welding port, the leaked medium will enter one of the annular grooves 13; since the two annular grooves 13 are connected by the channel 131, there will be leakage medium in both annular grooves 13, that is, no matter in which annular groove 13 the leakage sensing sensor is arranged, as long as leakage occurs, the leakage sensing sensor will detect the leakage medium.

[0026] In some embodiments, Figures 1 to 12 As shown, the electric fusion pipe fitting 1 includes an electric fusion sleeve, an electric fusion tee, an electric fusion elbow, an electric fusion reducer and an electric fusion end cap; end covers 14 are respectively arranged at both ends of the electric fusion pipe fitting 1, the outer peripheral walls at both ends of the electric fusion pipe fitting 1 are arranged with external threads, the end covers 14 are arranged with internal threads, and the end covers 14 are threadedly matched with the end parts of the electric fusion pipe fitting 1; a sealing gasket is arranged between the end covers 14 and the end parts of the electric fusion pipe fitting 1.

[0027] Exemplarily, tightening the end cap 14 causes the end cap 14 to squeeze the sealing gasket in the sealing chamber 17 of the electrofusion pipe 1, and the sealing gasket generates expansion force to achieve the purpose of sealing and isolation. The sealing gasket can be an O-ring or a reciprocating seal.

[0028] The material of the sealing gasket is selected according to the pipeline transportation medium and laying environment. It is necessary to ensure that the pipeline transportation medium and operating conditions, and also to ensure that the pipeline laying environment has no adverse effects on the performance and service life of the sealing material, and meet the life cycle requirements for normal operation of the pipeline.

[0029] In some embodiments, Figures 1 to 12 As shown, annular grooves 15 are respectively provided on the outer surfaces of both ends of the electric fusion pipe fitting 1, and a clamp 4 is installed in the annular groove 15. A longitudinal groove 16 is provided in the annular groove 15 of the electric fusion pipe fitting 1 toward the outside of the pipe fitting. When the sealing gasket is installed in the sealing chamber 17 of the electric fusion pipe fitting 1, the screws of the clamp 4 are tightened, and the elastic sealing member is squeezed to generate expansion force, thereby sealing and isolating the electric fusion pipe fitting 1 from the outside of the pipe.

[0030] The material of the clamp 4 is determined according to the pipeline transportation medium and the pipeline laying environment. To ensure the pipeline transportation medium and operating conditions, it is also necessary to ensure that the pipeline laying environment has no adverse effects on the performance and service life of the clamp 4 material, and meet the life cycle requirements of normal operation of the pipeline.

[0031] The sealing gasket of the end sealing chamber 17 of the electrofusion pipe fitting 1 may be an O-ring, a reciprocating seal, etc.

[0032] In some embodiments, Figures 1 to 12 As shown, the leakage monitoring device also includes a signal indication structure 3, which is connected to the pipeline local area network through a signal line; the signal indication structure 3 is located on the ground surface.

[0033] It should be noted that the signal indication structure 3 is arranged directly above the electric fusion pipe fitting 1, and the signal indication structure 3 is located on the ground surface; when a leakage occurs, the signal indication structure 3 can be controlled to emit a bright light through the pipeline local area network, which can serve as an indication to the operator, making it easier for the operator to determine the location of the leakage, and then to dig out the pipeline at the leakage location.

[0034] In some embodiments, Figures 1 to 12As shown, the signal indication structure 3 includes a support frame 34 and a containing box 31; the support frame 34 is arranged at the position of the electric fusion pipe fitting 1; the containing box 31 is arranged on the top of the support frame 34; a signal light 32 is arranged in the containing box 31, and a light-transmitting plate 35 is detachably arranged on the top of the containing box 31; a cable connected to the pipeline LAN is arranged on the containing box 31, and one end of the cable located in the containing box 31 has a working interface connected to the signal light 32; wherein, after the buried polyethylene pipeline 2 is buried, the light-transmitting plate 35 on the top of the containing box 31 is in the same plane with the ground surface.

[0035] It should be noted that the cables are laid along the length direction of the buried polyethylene pipe 2; the support frame 34 is set at the position of the electric fusion pipe 1, and the support frame 34 can support the receiving box 31; when the buried polyethylene pipe 2 is buried, the receiving box 31 can remain relatively stable under the support of the support frame 34; after the burial is completed, the top of the receiving box 31 is in the same plane as the ground surface. By setting a light-transmitting plate 35 on the top of the receiving box 31, the light in the receiving box 31 can be emitted from the receiving box 31, so that it is convenient for the operator to determine the position of the electric fusion pipe 1.

[0036] In some embodiments, Figures 1 to 12 As shown, a test interface is provided on the light-transmitting plate 35, and the signal light 32 is connected to the test interface through a cable; a sealing cover plate 33 is provided on the top of the light-transmitting plate 35 at the position of the test interface; the light-transmitting plate 35 has a groove 351 at the position of the test interface, and the test interface is arranged on the bottom wall of the groove 351; the sealing cover plate 33 is directly buckled in the groove 351, and the top of the sealing cover plate 33 and the top of the light-transmitting plate 35 are in the same plane; a pull rope (not shown in the figure) is connected to the top of the sealing cover plate 33, and when the signal light 32 needs to be tested, the operator can pull the sealing cover plate 33 out of the groove 351 by pulling the pull rope. A protrusion 353 is provided on the inner peripheral wall of the groove 351, and the protrusion 353 can support the sealing cover plate 33.

[0037] It should be noted that when the operator inspects the signal light 32, the operator carries a mobile power supply and connects the mobile power supply to the test interface to observe whether the signal light 32 is on; if the signal light 32 is on, it means that there is no problem with the signal light 32, and the inspection of the next storage box 31 can continue; if the signal light 32 is not on, it means that the signal is damaged, and the signal light 32 needs to be replaced.

[0038] In addition, during the test, if the signal light 32 lights up normally, a control signal is transmitted to the signal light 32 through the pipeline LAN to determine whether there is a problem with the transmission line. Alternatively, a control signal can be transmitted to the signal light 32 through the pipeline LAN first, and if the signal light 32 does not light up, a second test is performed on the signal light 32 through the test interface.

[0039] Exemplarily, numbers can be set on the light-transmitting plate 35, and the numbers correspond to the position information of the electric fusion pipe fittings 1 one by one; when a leak occurs, if there is a problem with the signal light 32 at this time, the operator can also find the electric fusion pipe fitting 1 with the leak problem.

[0040] Illustratively, a lifting groove 352 is provided on the inner peripheral wall of the groove 351 , and the operator's finger can be inserted into the lifting groove 352 , thereby facilitating the operator to pull the light-transmitting plate 35 out of the receiving box 31 .

[0041] In some embodiments, Figures 1 to 12 As shown, a limit frame 36 is provided near the top of the inner wall of the receiving box 31, the light-transmitting plate 35 is plugged into the receiving box 31, and the bottom of the light-transmitting plate 35 is in contact with the limit frame 36; wherein a seal is provided on the outer wall of the light-transmitting plate 35.

[0042] It should be noted that the sealing member may be a sealing ring; or a sealing gasket, which is a frame-shaped structure; by providing a sealing member on the outer peripheral wall of the light-transmitting plate 35 , the sealing performance between the light-transmitting plate 35 and the containing box 31 can be improved.

[0043] Exemplarily, a pull rope may be fixedly provided on the light-transmitting plate 35 , and when the light-transmitting plate 35 needs to be taken out, the light-transmitting plate 35 can be taken out of the containing box 31 by pulling the pull rope.

[0044] In some embodiments, Figures 1 to 12 As shown, the support frame 34 includes at least two support columns 37 tangent to the two sides of the electrofusion pipe fitting 1 respectively. A positioning tube 38 is connected to the outer wall of the electrofusion pipe fitting 1 at the position of the support column 37. The support column 37 and the positioning tube 38 are plugged and matched.

[0045] It should be noted that, by plugging and fitting the support column 37 with the positioning tube 38, on the one hand, the support column 37 can stably support the containing box 31; on the other hand, when leakage occurs, the support column 37 can play a guiding role in the excavation process, thereby reducing the possibility of the excavation tool colliding with the buried polyethylene pipe 2.

[0046] Exemplarily, the two positioning cylinders 38 can be fixed on the arc plate 39, the arc plate 39 is sleeved on the outer peripheral wall of the electric fusion pipe fitting 1, and the interface positions at both ends of the arc plate 39 are connected by bolts and nuts, so that the arc plate 39 can be clamped on the outer peripheral wall of the electric fusion pipe fitting 1; through the above arrangement, the positions of the two positioning cylinders 38 can be adjusted so that the two positioning cylinders 38 are arranged along the height direction to ensure that the two support columns 37 of the support frame 34 are in a vertically arranged state.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A buried polyethylene pipeline electric fusion welding joint leakage monitoring device, characterized in that: It comprises an electric fusion pipe fitting, which can be sleeved on a buried polyethylene pipe; The inner surface of the electric fusion pipe is provided with a heating wire, and both ends of each section of the heating wire are electrically connected to a terminal, and one end of the terminal is located outside the electric fusion pipe; A detection area is formed between the end of the electrofusion pipe and the electric heating wire, and an annular groove is provided on the inner surface of the electrofusion pipe at the position of the detection area; A leakage sensing sensor and a position information storage device are provided in the annular groove, and the leakage sensing sensor and the position information storage device are respectively connected to the pipeline local area network through signal lines; When a leak occurs at a weld, the leak sensing sensor collects the leak signal, and the location information storage device uploads the location information to the control center monitoring platform through the pipeline LAN to display the location information of the leak point. The leakage monitoring device also includes a signal indication structure, which is connected to the pipeline local area network through a signal line; the signal indication structure is located on the ground surface.

2. A buried polyethylene pipeline electric fusion welding joint leakage monitoring device as claimed in claim 1, characterized in that: The leakage sensing sensor includes one or more of a harmful gas concentration sensor, a combustible gas sensor, a pressure sensor, an odor sensor, and a temperature sensor.

3. A buried polyethylene pipeline electric fusion welding joint leakage monitoring device as claimed in claim 1, characterized in that: Annular grooves are arranged near both ends of the inner peripheral wall of the electrofusion pipe fitting, and a channel for connecting the two annular grooves is arranged inside the side wall of the electrofusion pipe fitting; the leakage sensing sensor and the position information storage device are arranged in one of the annular grooves.

4. A buried polyethylene pipeline electric fusion welding joint leakage monitoring device as claimed in claim 1, characterized in that: Annular grooves are arranged near both ends of the inner peripheral wall of the electrofusion pipe fitting, and a channel for connecting the two annular grooves is arranged inside the side wall of the electrofusion pipe fitting; a leakage sensing sensor is arranged in one of the annular grooves, and a position information storage device is arranged in the other annular groove.

5. A buried polyethylene pipe electric fusion weld leakage monitoring device as claimed in claim 1, characterized in that: A sealing structure is arranged at the end of the electrofusion pipe.

6. A buried polyethylene pipeline electric fusion welding joint leakage monitoring device as claimed in claim 1, characterized in that: The electric fusion pipe fittings include an electric fusion sleeve, an electric fusion tee, an electric fusion elbow, an electric fusion reducer and an electric fusion end cap.

7. A buried polyethylene pipeline electric fusion welding joint leakage monitoring device as claimed in claim 1, characterized in that: The signal indication structure comprises: A support frame, arranged at the position of the electric fusion pipe fitting; A storage box is arranged on the top of the support frame; a signal light is arranged in the storage box, and a light-transmitting plate is detachably arranged on the top of the storage box; a cable connected to the pipeline local area network is arranged on the storage box, and one end of the cable located in the storage box has a working interface connected to the signal light; After the buried polyethylene pipe is buried, the light-transmitting plate on the top of the containing box is in the same plane as the ground surface.

8. A buried polyethylene pipe electric fusion weld leakage monitoring device as claimed in claim 7, characterized in that: The light-transmitting plate is provided with a test interface, and the signal light is connected to the test interface via a cable; a sealing cover is provided on the top of the light-transmitting plate at the position of the test interface.

9. A buried polyethylene pipeline electric fusion welding joint leakage monitoring device as claimed in claim 7, characterized in that: The inner peripheral wall of the containing box has a limiting frame near the top, the light-transmitting plate is plugged into the containing box, and the bottom of the light-transmitting plate contacts the limiting frame; wherein the outer peripheral wall of the light-transmitting plate has a sealing member.

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