CN219530587U - Natural gas pipeline valve well leakage detection device - Google Patents

Abstract

The utility model provides a natural gas pipeline valve well leakage detection device, which comprises a surrounding cylinder and a leakage observation assembly, wherein the surrounding cylinder comprises an upper half cylinder and a lower half cylinder which are connected in a hinged manner, and a transparent cover is covered on the periphery of the upper half cylinder; the air leakage observation assembly is arranged on the upper half cylinder and comprises a vertical cylinder and a lifting column, wherein the upper end of the lifting column is provided with an upper supporting plate, the lower end of the lifting column is connected with a lower pushing plate, and a plurality of vent holes are formed in the lower pushing plate in a penetrating manner. According to the leakage detection device for the natural gas pipeline valve shaft, the upper half cylinder and the lower half cylinder can be enclosed on the periphery of a natural gas pipeline, the transparent cover above the upper half cylinder can be used for directly observing the leakage observation assembly, when the natural gas pipeline leaks, gas can be discharged into the transparent cover through the vertical cylinder, the lower push plate pushes the lifting column upwards under the impact action of the gas flow, the upper support plate is driven to open the upper opening of the vertical cylinder, the leakage condition of the natural gas pipeline is intuitively judged through observing the lifting action of the lifting column, and the device is convenient to maintain and process in time.

Description

Natural gas pipeline valve well leakage detection device

Technical Field

The utility model belongs to the technical field of natural gas leakage detection, and particularly relates to a natural gas pipeline valve well leakage detection device.

Background

In the natural gas conveying process, steel pipes or PE pipes are generally adopted. Because the pipeline is easy to leak after long-time use, a device capable of monitoring natural gas leakage needs to be installed to monitor the pipeline in the valve well. The existing detection mode through a sensor generally adopts a concentration monitoring method, namely when the concentration in the environment reaches a certain value due to the leakage of the gas in a valve well, the sensor can detect the leakage of the gas. Under the condition of small leakage caliber of the pipeline, the mode is difficult to measure, the concentration value which is detected can be reached only after long accumulation, and the small leakage point can not be treated in time.

Disclosure of Invention

The utility model aims to provide a leakage detection device for a valve well of a natural gas pipeline, which can timely treat small leakage points on the natural gas pipeline, is convenient and accurate to monitor and is convenient to maintain in time.

In order to achieve the above purpose, the utility model adopts the following technical scheme: provided is a natural gas pipeline valve well leakage detection device, comprising:

the enclosing cylinder comprises an upper half cylinder and a lower half cylinder which are connected in a hinged manner, the upper half cylinder and the lower half cylinder can be enclosed on the periphery of the natural gas pipeline and locked by a locking piece, and a transparent cover is covered on the periphery of the upper half cylinder;

the air leakage observation assembly is arranged on the upper half cylinder, the air leakage observation assembly comprises a vertical cylinder penetrating through the top wall of the upper half cylinder along the up-down direction and a lifting column arranged in the vertical cylinder along the axial direction of the vertical cylinder, an upper supporting plate arranged on the upper end face of the vertical cylinder is arranged at the upper end of the lifting column, a lower pushing plate which is connected in the vertical cylinder in a sliding mode is connected at the lower end of the lifting column, and a plurality of vent holes are formed in the lower pushing plate in a penetrating mode.

In one possible implementation, the upper end of the vertical cylinder gradually extends obliquely to the axis; the lower end of the vertical cylinder is provided with a collecting cylinder, and the lower opening of the collecting cylinder is a horn mouth.

In some embodiments, a conical block protruding upwards is arranged above the upper supporting plate, and the lamp beads are embedded on the conical block.

In one possible implementation manner, the wall of the upper half cylinder is further embedded with a film component, the film component comprises a mounting frame and a polyester film plugged on the mounting frame, and the polyester film can bulge when the air pressure in the enclosure cylinder is increased.

In some embodiments, the air leakage observation assembly is arranged at intervals in the axial direction of the upper half cylinder, the membrane assembly is arranged at intervals in the axial direction of the upper half cylinder, and the membrane assembly and the air leakage observation assembly are arranged at intervals in the axial direction of the upper half cylinder.

In one possible implementation manner, sealing rubber strips are respectively arranged on the adjacent edges of the upper half cylinder and the lower half cylinder, the sealing rubber strips are used for sealing a gap between the upper half cylinder and the lower half cylinder, and the upper half cylinder and the lower half cylinder are respectively provided with a butt rubber strip used for being abutted on the peripheral wall of the natural gas pipeline.

In one possible implementation, an airtight detection component is disposed within the transparent cover, the airtight detection component comprising:

the laser emission element is arranged on one side wall of the transparent cover and is used for emitting laser beams;

the laser receiving element is arranged on the other side wall of the transparent cover and opposite to the laser emitting element, and is used for receiving the laser beam and generating laser parameters;

and the controller is electrically connected with the laser receiving element and is used for receiving the laser parameters and judging the leakage condition of the natural gas.

In some embodiments, the laser emitting element and the laser receiving element are arranged at intervals in the axial direction of the enclosing cylinder, and the emitting end of the laser emitting element is horizontally arranged corresponding to the receiving end of the laser receiving element.

In some embodiments, two sets of airtight detection components are arranged in the transparent cover, and the two sets of airtight detection components are respectively located on two sides above the axis of the upper half cylinder.

In some embodiments, the natural gas pipeline valve well leakage detection device further comprises an alarm device arranged at the top of the transparent cover and electrically connected with the controller, and the alarm device is used for receiving an alarm instruction of the controller and generating an alarm signal.

Compared with the prior art, the leakage detection device for the natural gas pipeline valve well provided by the embodiment of the utility model has the advantages that the upper half cylinder and the lower half cylinder can be enclosed on the periphery of a natural gas pipeline, a space enclosed on the periphery of the natural gas pipeline is formed inside the enclosed cylinder, the transparent cover above the upper half cylinder can be used for directly observing the leakage observation assembly, when the natural gas pipeline leaks gas, the gas can be discharged into the transparent cover through the vertical cylinder, the lower push plate pushes the lifting column upwards under the impact of the gas flow, the upper port of the vertical cylinder is further driven to be opened by the upper push plate, the leakage condition of the natural gas pipeline is intuitively judged through the lifting action of the lifting column, and the maintenance treatment is convenient in time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of a natural gas pipeline valve well leakage detection device according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1 in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of B-B in FIG. 1 according to an embodiment of the present utility model;

FIG. 4 is a schematic view illustrating another state of the leakage observation assembly shown in FIG. 3 according to an embodiment of the present utility model;

FIG. 5 is a schematic view of another state of the membrane module shown in FIG. 4 according to an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the leakage observing assembly shown in FIG. 1 according to an embodiment of the present utility model.

Wherein, each reference sign in the figure:

1. a closing cylinder; 11. an upper half cylinder; 12. a lower half cylinder; 13. a transparent cover; 14. a locking member; 15. a sealing rubber strip; 16. abutting against the adhesive tape; 2. a leakage observation assembly; 21. a vertical cylinder; 22. lifting columns; 23. an upper supporting plate; 24. a lower push plate; 25. a vent hole; 26. a collection cylinder; 27. a conical block; 28. a lamp bead; 3. a membrane assembly; 31. a mounting frame; 32. a polyester film; 41. a laser emitting element; 42. a laser receiving element; 5. an alarm device; 6. natural gas pipeline.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a number" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 6, a description will now be given of a leak detection apparatus for a valve well of a natural gas pipeline according to the present utility model. The natural gas pipeline valve well leakage detection device comprises a surrounding cylinder 1 and a leakage observation assembly 2, wherein the surrounding cylinder 1 comprises an upper half cylinder 11 and a lower half cylinder 12 which are connected in a hinged manner, the upper half cylinder 11 and the lower half cylinder 12 can be surrounded on the periphery of a natural gas pipeline and are locked through a locking piece 14, and a transparent cover 13 is covered on the periphery of the upper half cylinder 11; the air leakage observation assembly 2 is arranged on the upper half cylinder 11, the air leakage observation assembly 2 comprises a vertical cylinder 21 penetrating through the top wall of the upper half cylinder 11 along the up-down direction and a lifting column 22 arranged in the vertical cylinder 21 along the axial direction of the vertical cylinder 21, an upper supporting plate 23 arranged on the upper end face of the vertical cylinder 21 is arranged at the upper end of the lifting column 22, a lower pushing plate 24 connected in the vertical cylinder 21 in a sliding mode is connected at the lower end of the lifting column 22, and a plurality of vent holes 25 are formed in the lower pushing plate 24 in a penetrating mode.

Compared with the prior art, the leakage detection device for the natural gas pipeline valve well provided by the embodiment has the advantages that the upper half cylinder 11 and the lower half cylinder 12 can be enclosed on the periphery of the natural gas pipeline 6, the space enclosed on the periphery of the natural gas pipeline 6 is formed inside the enclosing cylinder 1, the transparent cover 13 above the upper half cylinder 11 can be used for directly observing the leakage observation assembly 2, when the natural gas pipeline 6 leaks, gas can be discharged into the transparent cover 13 through the vertical cylinder 21, the lower push plate 24 pushes the lifting column 22 upwards under the impact action of air flow, the upper opening of the vertical cylinder 21 is further driven to open the upper supporting plate 23, the leakage condition of the natural gas pipeline 6 is intuitively judged through the lifting action of the lifting column 22, and the maintenance treatment is facilitated in time.

In this embodiment, whether the natural gas pipe 6 leaks or not can be directly determined by observing the vertical state of the lifting column 22 and the upper pallet 23 at the upper end. When the air pushes the lower push plate 24 upwards, the air flows from bottom to top in the air vent 25 to form a pushing action on the bottom surface of the upper support plate 23, so that the upper support plate 23 drives the lifting column 22 to move upwards to open the upper opening of the vertical cylinder 21.

On the basis, a discharge port can be further formed in the transparent cover 13, and in a normal state, the discharge port is tightly plugged by a plug, and in a closed state, when the air pressure in the transparent cover 13 becomes large after a certain period of time is detected, the air flow is influenced to flow up and down from the vertical cylinder 21 to the transparent cover 13, the plug can be opened to discharge the air, and the normal use of a subsequent device is facilitated.

In some possible implementations, the feature stand 21 adopts the structure shown in fig. 1 and 6. Referring to fig. 1 and 6, the upper end of the upright tube 21 gradually extends obliquely toward the axial center; the lower end of the vertical cylinder 21 is provided with a collecting cylinder 26, and the lower opening of the collecting cylinder 26 is a horn mouth.

In this embodiment, the upper end of the vertical tube 21 is gradually folded, so as to increase the impact force of the air flow, achieve the pushing effect on the upper supporting plate 23, the collecting tube 26 at the lower end of the vertical tube 21 can collect the air, so that the air flow smoothly enters the vertical tube 21 and flows to the lower part of the upper supporting plate 23 through the air vent 25, achieve the pushing effect on the upper supporting plate 23, achieve the effect of driving the lifting column 22 to move upwards, and facilitate direct observation.

Specifically, the upper supporting plate 23, the lifting column 22 and the lower pushing plate 24 are made of light materials such as aluminum foils, so that the problems of high pushing difficulty and inaccurate monitoring caused by overlarge weight are avoided. In addition, the lower push plate 24 is arranged with two or more than two at intervals in the axial direction of the lifting column 22, so that the lubrication degree of sliding fit between the lower push plate 24 and the vertical cylinder 21 is conveniently improved, and the problems of jamming and the like are avoided.

In some embodiments, the characteristic upper tray 23 adopts a structure as shown in fig. 6. Referring to fig. 6, a tapered block 27 protruding upward is provided above the upper plate 23, and a lamp bead 28 is fitted on the tapered block 27. The conical blocks 27 above the upper pallet 23 are also made of a light material, and the outer surfaces thereof can be coated with a vivid color to provide a good marking effect.

On the basis, the lamp beads 28 are embedded on the conical blocks 27, so that the natural gas pipeline 6 leakage condition can be conveniently observed under dark conditions, and accurate judgment is facilitated.

In one possible implementation, the upper half 11 is configured as shown in fig. 1 to 5. Referring to fig. 1 to 5, the wall of the upper half cylinder 11 is further embedded with a film assembly 3, the film assembly 3 comprises a mounting frame 31 and a polyester film 32 plugged on the mounting frame 31, and the polyester film 32 can bulge when the air pressure in the enclosure cylinder 1 increases.

In this embodiment, the film unit 3 is further provided on the wall of the upper half cylinder 11, and the pressure in the enclosure 1 is detected by the mylar 32 provided in the mounting frame 31. When the natural gas pipeline 6 leaks and the air pressure in the enclosing cylinder 1 increases, the middle part of the polyester film 32 can bulge upwards to form a bulge effect, so that the surface change of the bulge effect can be conveniently observed, and the judgment of the gas leakage condition can be realized.

In some embodiments, the above-described characteristic air leakage observation assembly 2 and the film assembly 3 adopt the structures shown in fig. 1 to 5. Referring to fig. 1 to 5, the air leakage observation assemblies 2 are arranged at intervals in the axial direction of the upper half cylinder 11, the film assemblies 3 are arranged at intervals in the axial direction of the upper half cylinder 11, and the film assemblies 3 and the air leakage observation assemblies 2 are arranged at intervals in the axial direction of the upper half cylinder 11.

In this embodiment, the leakage observation assembly 2 is provided with a plurality of leakage observation assemblies in the axial direction of the upper half cylinder 11, so as to monitor leakage conditions at different positions in the axial direction of the natural gas pipeline 6. The air leakage observation assembly 2 and the film assembly 3 are distributed at intervals in the axial direction of the upper half cylinder 11, and can be combined with the change condition of the air leakage observation assembly and the film assembly to judge the air leakage condition, so that the judgment accuracy is improved.

In some possible implementations, the upper half cylinder 11 and the lower half cylinder 12 have the structures shown in fig. 1 to 5. Referring to fig. 1 to 5, sealing rubber strips 15 are respectively arranged on the edges of the upper half cylinder 11 adjacent to the lower half cylinder 12, the sealing rubber strips 15 are used for sealing gaps between the upper half cylinder 11 and the lower half cylinder 12, and abutting rubber strips 16 used for abutting against the peripheral wall of the natural gas pipeline 6 are respectively arranged on the upper half cylinder 11 and the lower half cylinder 12, so that the enclosure cylinder 1 is in a sealing state, the overflow of leakage gas is avoided, and the monitoring accuracy is ensured.

In some possible implementations, the feature airtight detection component adopts a structure as shown in fig. 1 to 5. Referring to fig. 1 to 5, an airtight detection component is provided in the transparent cover 13, the airtight detection component includes a laser emitting element 41, a laser receiving element 42, and a controller, the laser emitting element 41 is provided on one side wall of the transparent cover 13 for emitting a laser beam; the laser receiving element 42 is disposed on the other side wall of the transparent cover 13 and opposite to the laser emitting element 41, and is used for receiving the laser beam and generating laser parameters; the controller is electrically connected to the laser receiving element 42 for receiving laser parameters and determining natural gas leakage conditions.

In this embodiment, when the natural gas pipe 6 located in the enclosure 1 leaks, the natural gas flows into the transparent cover 13, and the gas composition in the transparent cover 13 changes, which is different from the composition and density of the outside air. The laser beam emitted by the laser emitting element 41 is affected by the change of the density of the surrounding gas during the propagation, when the density of the natural gas in the transparent cover 13 is increased, the laser beam is refracted, so that the light intensity received by the laser receiving element 42 is reduced, and when the light intensity is reduced to a certain extent, the controller can judge that the natural gas pipeline 6 leaks according to a preset program.

The structure detects the natural gas pipeline 6 through the change of the optical signal, has high reliability and good accuracy, can be combined with the leakage observation assembly to judge the leakage condition of the natural gas pipeline 6, and has good rechecking effect.

In some embodiments, the laser emitting element 41 and the laser receiving element 42 are arranged at intervals in the axial direction of the enclosure 1, and the emitting end of the laser emitting element 41 is horizontally disposed corresponding to the receiving end of the laser receiving element 42. In this embodiment, the laser emitting element 41 and the laser receiving element 42 are correspondingly located at different positions on the axis of the natural gas pipeline 6, and after the laser beam is emitted, the laser beam is affected by the gas density in the above region to generate a refraction effect, so that the reaction can be performed on the gas condition in the larger region in the enclosure 1, and the leakage condition of the natural gas pipeline 6 is comprehensively judged by combining the leakage observation assembly 2 and the film assembly 3, so that the monitoring accuracy is improved.

In some embodiments, two sets of airtight detecting components are disposed in the transparent cover 13, and the two sets of airtight detecting components are respectively located on two sides above the axis of the upper half cylinder 11. The airtight detection components are arranged in the transparent cover 13 in two groups, and the two groups of airtight detection components are respectively positioned at two sides above the axis of the upper half cylinder 11; the laser emitting element 41 and the laser receiving element 42 are arranged at intervals in the axial direction of the enclosure 1.

In some embodiments, referring to fig. 1, the natural gas pipeline valve well leakage detection device further comprises an alarm device 5 disposed on the top of the transparent cover 13 and electrically connected to the controller, wherein the alarm device 5 is configured to receive an alarm instruction of the controller and generate an alarm signal.

In this embodiment, when the laser parameter received by the controller is smaller than the preset value, the controller sends an alarm signal to the alarm device 5, and the alarm device 5 sends an alarm instruction after receiving the alarm signal, so as to prompt the operator that the gas leakage of the natural gas occurs at the position, and the operator can conveniently and timely overhaul and maintain.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. Natural gas line valve well leakage detection device, its characterized in that includes:

the enclosing cylinder comprises an upper half cylinder and a lower half cylinder which are connected in a hinged manner, wherein the upper half cylinder and the lower half cylinder can be enclosed on the periphery of a natural gas pipeline and locked through a locking piece, and a transparent cover is covered on the periphery of the upper half cylinder;

the gas leakage observation assembly is arranged on the upper half cylinder, the gas leakage observation assembly comprises a vertical cylinder penetrating through the top wall of the upper half cylinder along the vertical direction and a lifting column arranged in the vertical cylinder along the axial direction of the vertical cylinder, an upper supporting plate arranged on the upper end face of the vertical cylinder is arranged at the upper end of the lifting column, the lower end of the lifting column is connected with a lower pushing plate which is connected with the vertical cylinder in a sliding manner, and a plurality of vent holes are formed in the lower pushing plate in a penetrating manner.

2. The natural gas pipeline valve well leakage detection device according to claim 1, wherein the upper end of the vertical cylinder gradually extends to the axis in an inclined manner; the lower extreme of standing a section of thick bamboo is equipped with the collection section of thick bamboo, the lower extreme of collection section of thick bamboo is the horn mouth.

3. The natural gas pipeline valve well leakage detection device according to claim 2, wherein a conical block protruding upwards is arranged above the upper supporting plate, and a lamp bead is embedded on the conical block.

4. The natural gas pipeline valve well leakage detection device according to claim 1, wherein a film component is further embedded on the wall of the upper half cylinder, the film component comprises a mounting frame and a polyester film plugged on the mounting frame, and the polyester film can bulge when the internal air pressure of the enclosing cylinder is increased.

5. The natural gas pipeline valve well leakage detection device according to claim 4, wherein the leakage observation assemblies are arranged at intervals in the axial direction of the upper half cylinder, the membrane assemblies are arranged at intervals in the axial direction of the upper half cylinder, and the membrane assemblies and the leakage observation assemblies are arranged at intervals in the axial direction of the upper half cylinder.

6. The natural gas pipeline valve well leakage detection device according to claim 1, wherein sealing rubber strips are respectively arranged on edges of the upper half cylinder adjacent to the lower half cylinder, the sealing rubber strips are used for sealing gaps between the upper half cylinder and the lower half cylinder, and abutting rubber strips used for abutting on the peripheral wall of the natural gas pipeline are respectively arranged on the upper half cylinder and the lower half cylinder.

7. A natural gas pipeline valve well leak detection apparatus as defined in any one of claims 1-6, wherein an airtight detection assembly is provided within the transparent cover, the airtight detection assembly comprising:

the laser emission element is arranged on one side wall of the transparent cover and is used for emitting laser beams;

the laser receiving element is arranged on the other side wall of the transparent cover and opposite to the laser emitting element, and is used for receiving the laser beam and generating laser parameters;

and the controller is electrically connected with the laser receiving element and is used for receiving the laser parameters and judging the leakage condition of the natural gas.

8. The natural gas pipeline valve well leakage detection device according to claim 7, wherein the laser emitting element and the laser receiving element are arranged at intervals in the axial direction of the enclosing cylinder, and the emitting end of the laser emitting element is horizontally arranged corresponding to the receiving end of the laser receiving element.

9. The natural gas pipeline valve well leakage detection device according to claim 7, wherein two groups of the airtight detection assemblies are arranged in the transparent cover, and the two groups of the airtight detection assemblies are respectively close to two sides above the axis of the upper half cylinder.

10. The natural gas pipeline valve well leak detection apparatus of claim 7, further comprising an alarm device disposed on top of the transparent cover and electrically connected to the controller, the alarm device configured to receive an alarm command from the controller and generate an alarm signal.