CN213333718U

CN213333718U - Natural gas pipeline carries gas leakage detection device

Info

Publication number: CN213333718U
Application number: CN202021959864.3U
Authority: CN
Inventors: 钟磊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-06-01
Anticipated expiration: 2030-09-09

Abstract

The utility model belongs to the technical field of pipeline detection, in particular to a natural gas pipeline conveying gas leakage detection device, which comprises a pipeline, a first flange plate and a second flange plate, wherein the front sides of the first flange plate and the second flange plate are provided with an upper connecting piece and a lower connecting piece, an upper pulley and a lower pulley which are arranged on a rotating shaft rotationally connected with the upper connecting piece and the lower connecting piece are provided with a flexible cable in a transmission way, the rotating shaft on the first flange plate is connected with a speed reducing motor, a connecting plate arranged on the side surface of the lower connecting piece is provided with a limit switch, fixed blocks connected with the two ends of the flexible cable are connected with the inner wall of a mobile detection box, the inner part of the mobile detection box is provided with a methane sensor, the top end of the mobile detection box is provided with an acousto-optic alarm, the mobile detection box can move on, the transmission system composed of the upper pulley, the lower pulley and the flexible cable has long transmission distance, and the manufacturing and using cost of the device can be greatly reduced.

Description

Natural gas pipeline carries gas leakage detection device

Technical Field

The utility model belongs to the technical field of the pipeline detects, concretely relates to natural gas line carries gas leakage detection device.

Background

Natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the air space, water space and rock space (including oil field gas, gas field gas, mud volcanic gas, coal bed gas, biogenetic gas and the like). The definition of "natural gas" which has been common for a long time is a narrow definition from the energy point of view, and refers to a mixture of hydrocarbon and non-hydrocarbon gases which are naturally trapped in the formation.

Need rely on the pipeline transportation in the natural gas transportation process, and when carrying the natural gas through the pipeline, the phenomenon of pipeline gas leakage often can appear, so, not only can cause the waste of resource, but also can arouse conflagration and explosion accident, there is very big potential safety hazard, there is not inspection device behind the current pipeline gas leakage, thereby lead to a large amount of gas to run into the air, not only the resource is wasted, the polluted environment more, some natural gas pipeline transport gas leakage detection device that have now are only a plurality of detection device of simple interval arrangement, when detection device lays density big, the cost is higher, when detection device lays density hour, can't pinpoint specific leak point again, be unfavorable for quick maintenance.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a natural gas line carries gas leakage detection device, when removing the detection box and can moving on the flexible cable, detect the concrete position of revealing of pipeline through methane sensor, make the audible-visual annunciator send the audible-visual alarm to improve staff's maintenance efficiency, the transmission system transmission distance that upper pulley, lower pulley, flexible cable are constituteed is far away, but the manufacturing and the use cost of this device of greatly reduced.

In order to achieve the above object, the utility model provides a following technical scheme: a gas leakage detection device for natural gas pipeline transportation comprises a pipeline, a first flange plate and a second flange plate, wherein pressure transmitters are fixedly mounted on the upper sides of the first flange plate and the second flange plate respectively, an upper connecting piece and a lower connecting piece are fixedly mounted on the front sides of the first flange plate and the second flange plate respectively, the upper connecting piece and the lower connecting piece rotate to connect the two ends of a rotating shaft, an upper pulley and a lower pulley are fixedly mounted on the rotating shaft, an output shaft of a reduction motor is fixedly connected to the top end of the rotating shaft on the first flange plate, a flexible cable is mounted on the upper pulley and the lower pulley in a transmission mode, a connecting plate is fixedly mounted on the side surface of the lower connecting piece, a limit switch is fixedly mounted on the side surface of the connecting plate, fixed blocks are fixedly connected to the two ends of the flexible cable, the inner wall of a movable detection box is fixedly connected, and the top end of the movable detection box is fixedly provided with an acousto-optic alarm.

Preferably, the first flange plate and the second flange plate are respectively and fixedly arranged at two ends of the pipeline, and the detection end of the pressure transmitter is arranged on the inner sides of the first flange plate and the second flange plate in a penetrating way; the pressure transmitter installed on the first flange and the second flange can detect the pressure difference at two ends of the pipeline, thereby determining whether the pipeline leaks.

Preferably, the upper connecting piece is arranged above the lower connecting piece, the upper connecting piece and the lower connecting piece are flat cuboids with the same structure, the upper pulley and the lower pulley have the same structure and size, and the upper pulley is arranged above the lower pulley; the transmission system composed of the upper pulley, the lower pulley and the flexible cable has long transmission distance, simple structure, low installation requirement and low cost, and can greatly reduce the manufacturing and using cost of the device.

Preferably, the number of the flexible cables is two, four through holes for slidably connecting the flexible cables are symmetrically formed in the left side surface and the right side surface of the movable detection box in pairs, and the diameter of the fixed block is 2-3 times that of the through holes formed in the left side surface and the right side surface of the movable detection box; when the upper pulley and the lower pulley rotate to drive the flexible cable to rotate, the mobile detection box can horizontally move on the flexible cable, and the stability is higher.

Preferably, the measuring end of the methane sensor penetrates through the bottom surface of the mobile detection box; when the mobile detection box moves on the flexible cable, the methane sensor can detect the specific leakage position of the pipeline, so that the overhauling efficiency of workers is improved.

Preferably, the methane sensor is electrically connected with the acousto-optic alarm through a relay; when the methane sensor detects the leakage part of the pipeline, the acousto-optic alarm gives out acousto-optic alarm to remind workers of paying attention, so that the overhauling efficiency of the workers is improved.

Preferably, the connecting plate is fixedly arranged on the side surface of the lower connecting piece adjacent to the pipeline, the limit switch is fixedly arranged on the side surface of the connecting plate adjacent to the pipeline, and the limit switch is electrically connected with the speed reduction motor; the limit switch can limit the moving distance of the mobile detection box, and the speed reduction motor is started or stopped or the steering of the speed reduction motor is adjusted when the mobile detection box is close to the first flange plate and the second flange plate, so that the use safety and stability of the device are ensured.

Compared with the prior art, the beneficial effects of the utility model are that: pressure transmitters arranged on the first flange plate and the second flange plate can detect the pressure difference at two ends of the pipeline so as to determine whether the pipeline leaks; the transmission system consisting of the upper pulley, the lower pulley and the flexible cable has long transmission distance, simple structure, low installation requirement and low cost, and can greatly reduce the manufacturing and using cost of the device; when the upper pulley and the lower pulley rotate to drive the flexible cable to rotate, the mobile detection box can horizontally move on the flexible cable, and the stability is high; when the movable detection box moves on the flexible cable, the methane sensor can detect the specific leakage position of the pipeline, so that the overhauling efficiency of workers is improved; when the methane sensor detects a leakage part of the pipeline, the acousto-optic alarm gives out acousto-optic alarm to remind workers of paying attention, so that the overhauling efficiency of the workers is improved; the limit switch can limit the moving distance of the mobile detection box, and the speed reduction motor is started or stopped or the steering of the speed reduction motor is adjusted when the mobile detection box is close to the first flange plate and the second flange plate, so that the use safety and stability of the device are ensured.

The parts of the device not involved are the same as or can be implemented using prior art.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a front cross-sectional view of the present invention;

fig. 3 is a top view of the present invention;

FIG. 4 is an enlarged view of A of the present invention;

FIG. 5 is a side sectional view of the mobile testing cassette of the present invention;

in the figure: 1. a pipeline; 2. a first flange plate; 3. a second flange plate; 4. a pressure transmitter; 5. an upper connecting piece; 6. a lower connecting piece; 7. a rotating shaft; 8. an upper pulley; 9. a lower pulley; 10. a reduction motor; 11. a flexible cable; 12. a connecting plate; 13. a limit switch; 14. moving the detection box; 15. a fixed block; 16. a methane sensor; 17. an acousto-optic alarm.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-5, the present invention provides the following technical solutions: the utility model provides a natural gas line carries gas leakage detection device, includes pipeline 1, first ring flange 2, second ring flange 3, the equal fixed mounting of upside of first ring flange 2 and second ring flange 3 has pressure transmitter 4, the equal fixed mounting of front side of first ring flange 2 and second ring flange 3 has last connecting piece 5 and lower connecting piece 6, go up connecting piece 5 and the both ends of connecting pivot 7 of lower connecting piece 6 rotation, fixed mounting has top pulley 8 and lower pulley 9 on the pivot 7, the top fixed connection gear motor 10's of pivot 7 on the first ring flange 2 output shaft, top pulley 8 and the equal transmission of lower pulley 9 install flexible rope 11, the side fixed mounting of lower connecting piece 6 has connecting plate 12, the side fixed mounting of connecting plate 12 has limit switch 13, the both ends fixedly connected with fixed block 15 of flexible rope 11, the side of the fixed block 15 is fixedly connected with the inner wall of the mobile detection box 14, the methane sensor 16 is fixedly arranged inside the mobile detection box 14, and the top end of the mobile detection box 14 is fixedly provided with the acousto-optic alarm 17.

Specifically, the first flange 2 and the second flange 3 are respectively and fixedly installed at two ends of the pipeline 1, and the detection end of the pressure transmitter 4 is installed at the inner sides of the first flange 2 and the second flange 3 in a penetrating manner; the pressure transmitter 4 mounted on the first flange 2 and the second flange 3 can detect the pressure difference across the pipe 1 to determine whether the pipe 1 leaks.

Specifically, the upper connecting piece 5 is arranged above the lower connecting piece 6, the upper connecting piece 5 and the lower connecting piece 6 are flat cuboids with the same structure, the upper pulley 8 and the lower pulley 9 are the same in structure and size, and the upper pulley 8 is arranged above the lower pulley 9; the transmission system composed of the upper pulley 8, the lower pulley 9 and the flexible cable 11 has long transmission distance, simple structure, low installation requirement and low cost, and can greatly reduce the manufacturing and using cost of the device.

Specifically, the number of the flexible cables 11 is two, four through holes in sliding connection with the flexible cables 11 are symmetrically formed in the left side surface and the right side surface of the movable detection box 14 in pairs, and the diameter of the fixed block 15 is 2-3 times that of the through holes formed in the left side surface and the right side surface of the movable detection box 14; when the upper pulley 8 and the lower pulley 9 rotate to drive the flexible cable 11 to rotate, the mobile detection box 14 can horizontally move on the flexible cable 11, and the stability is high.

Specifically, the measuring end of the methane sensor 16 penetrates the bottom surface of the movable detection box 14; when the mobile detection box 14 moves on the wire 11, the methane sensor 16 can detect the specific leakage position of the pipeline 1, thereby improving the maintenance efficiency of workers.

Specifically, the methane sensor 16 is electrically connected with an acousto-optic alarm 17 through a relay; when the methane sensor 16 detects the leakage part of the pipeline 1, the acousto-optic alarm 17 gives out acousto-optic alarm to remind workers of paying attention, so that the overhauling efficiency of the workers is improved.

Specifically, the connecting plate 12 is fixedly installed on the side surface of the lower connecting piece 6 adjacent to the pipeline 1, the limit switch 13 is fixedly installed on the side surface of the connecting plate 12 adjacent to the pipeline 1, and the limit switch 13 is electrically connected with the speed reduction motor 10; the limit switch 13 can limit the moving distance of the mobile detection box 14, and start and stop the deceleration motor 10 or adjust the steering of the deceleration motor 10 when the mobile detection box 14 is close to the first flange plate 2 and the second flange plate 3, so that the use safety and stability of the device are ensured.

The working principle and the using process of the invention are as follows: the first flange plate 2 and the second flange plate 3 are connected between adjacent pipelines 1 through bolts, when the device works, the pressure transmitter 4 arranged on the first flange plate 2 and the second flange plate 3 can detect the pressure difference at two ends of the pipelines 1, thereby determining whether the pipelines 1 leak or not, when the pressure transmitter 4 detects that the pipelines 1 leak, the speed reducing motor 10 is started, the output shaft of the speed reducing motor 10 drives the upper pulley 8 and the lower pulley 9 to rotate through the rotating shaft 7, the rotating upper pulley 8 and the lower pulley 9 drive the flexible cable 11, so that the mobile detection box 14 horizontally moves on the flexible cable 11, when the methane sensor 16 arranged in the mobile detection box 14 detects that the natural gas concentration at the position of the moving point exceeds the set threshold value, the audible and visual alarm 17 gives an alarm, so that a maintainer can quickly and accurately determine the specific leakage position of the pipelines 1, the maintenance efficiency of staff is improved, when removing detection box 14 and remove to the position that triggers limit switch 13, limit switch 13 opens and stops gear motor 10 or adjusts turning to of gear motor 10 to the restriction removes the maximum displacement distance of detection box 14, guarantees security and the stability that the device used.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a natural gas pipeline carries gas leakage detection device which characterized in that: the pipeline connecting device comprises a pipeline (1), a first flange plate (2) and a second flange plate (3), wherein a pressure transmitter (4) is fixedly mounted on the upper sides of the first flange plate (2) and the second flange plate (3), an upper connecting piece (5) and a lower connecting piece (6) are fixedly mounted on the front sides of the first flange plate (2) and the second flange plate (3), the upper connecting piece (5) and the lower connecting piece (6) rotate to be connected with the two ends of a rotating shaft (7), an upper pulley (8) and a lower pulley (9) are fixedly mounted on the rotating shaft (7), an output shaft of a speed reducing motor (10) is fixedly connected to the top end of the rotating shaft (7) on the first flange plate (2), a flexible cable (11) is mounted on the upper pulley (8) and the lower pulley (9) in a transmission manner, a connecting plate (12) is fixedly mounted on the side surface of the lower connecting piece (6), and a limit switch (13) is, the both ends fixedly connected with fixed block (15) of flexible cable (11), the side fixed connection of fixed block (15) removes the inner wall that detects box (14), the inside fixed mounting who removes detection box (14) has methane sensor (16), the top fixed mounting who removes detection box (14) has reputation siren (17).

2. The natural gas pipeline transportation gas leakage detection device according to claim 1, wherein: the first flange plate (2) and the second flange plate (3) are fixedly arranged at two ends of the pipeline (1) respectively, and the detection end of the pressure transmitter (4) is arranged on the inner sides of the first flange plate (2) and the second flange plate (3) in a penetrating mode.

3. The natural gas pipeline transportation gas leakage detection device according to claim 1, wherein: go up connecting piece (5) and set up the top at connecting piece (6) down, go up connecting piece (5) and connecting piece (6) are the same flat cuboid of structure down, it is the same with lower pulley (9) structure size to go up pulley (8), it sets up the top at lower pulley (9) to go up pulley (8).

4. The natural gas pipeline transportation gas leakage detection device according to claim 1, wherein: the number of the flexible cables (11) is two, four through holes in sliding connection with the flexible cables (11) are symmetrically formed in the left side surface and the right side surface of the movable detection box (14) in a pairwise mode, and the diameter of the fixing block (15) is 2-3 times that of the through holes formed in the left side surface and the right side surface of the movable detection box (14).

5. The natural gas pipeline transportation gas leakage detection device according to claim 1, wherein: the measuring end of the methane sensor (16) penetrates through the bottom surface of the mobile detection box (14).

6. The natural gas pipeline transportation gas leakage detection device according to claim 1, wherein: the methane sensor (16) is electrically connected with the acousto-optic alarm (17) through a relay.

7. The natural gas pipeline transportation gas leakage detection device according to claim 1, wherein: the connecting plate (12) is fixedly installed on the side face of the lower connecting piece (6) adjacent to the pipeline (1), the limit switch (13) is fixedly installed on the side face of the connecting plate (12) adjacent to the pipeline (1), and the limit switch (13) is electrically connected with the speed reducing motor (10).