Leakage point detection device for directly-buried gas pipeline

Abstract

The utility model relates to a leakage point detection device of a direct burial gas pipeline, which comprises a chisel head, a long pipe and a detector, the upper end of the chisel head is provided with a blind hole, the side surface of the chisel head is provided with an air inlet communicated with the blind hole, the lower end of the long pipe is connected in the blind hole through threads, the middle part of the long pipe is a channel, and the side surface of the long pipe is provided with a through hole communicated with the channel. A detection head is arranged at the front end of the detector and can be inserted into the channel through the through hole. Under the change and influence of airflow and air pressure outside the long pipe, the long pipe can guide fuel gas in a soil layer, namely, the fuel gas leaked from the soil layer enters from the air inlet more easily and escapes from the upper end of the through hole or the channel, which is equivalent to a gas collection function of guiding the fuel gas to enter the channel, so that the interference of combustible gas in flowing air is greatly reduced, and the service life of the fuel gas is prolonged. Therefore, the detection head can perform detection in the channel of the long pipe, and the gas leakage position can be quickly and accurately determined.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas detection technical field, concretely relates to a leakage point detection device of direct -buried gas pipeline. BACKGROUND

[0002] The buried position of gas pipeline in the road needs to be determined according to the road type, safety specification and actual condition, usually preferentially selects the below of non-motor vehicle lane or sidewalk, but needs to satisfy more stringent depth requirement when being buried below motor vehicle lane, so the direct -buried position of gas pipeline mostly is below the human step at present. Because of the existence of crustal movement phenomenon, or the unavoidable overload superheavy vehicle on the road, all can produce larger vibration, when this vibration is transmitted to gas pipeline, causes the sway of gas pipeline, especially the vibration of frequent overload superheavy vehicle can continuously test the reliability of gas pipeline, is easy to lead to the crack of gas pipeline connecting place or pipeline midsection, and further lead to gas leakage. When gas pipeline leakage occurs, the traditional mode is to use handheld detector, drills hole along the sidewalk ground interval 5-10m, inserts sampling probe to detect gas concentration, and then judges the approximate position of leakage, and under this mode, the probe is still about 0.6m height difference from the direct -buried gas pipeline, and the probe is difficult to collect and capture small gas concentration, and gas still escapes from each position of sidewalk, cannot ensure that the gas leakage position is determined in the first screening under 5-10m drilling interval arrangement, and under this mode, the probe is easy to be contaminated and corroded, is not conducive to the long -term use of detector. SUMMARY

[0003] To solve the above technical problem, the utility model provides a leakage point detection device of direct -buried gas pipeline, can greatly reduce the interference of flammable gas in flowing air, and quickly and accurately determine the gas leakage position.

[0004] The technical scheme of the utility model is as follows: a leakage point detection device of direct -buried gas pipeline, including chisel head, long tube and detector, the upper end of chisel head is equipped with blind hole, the side of chisel head is equipped with the air inlet that communicates with blind hole, the lower end of long tube is connected in blind hole through screw thread, the middle part of long tube is passageway, the side of long tube is equipped with the through -hole that communicates with passageway, and the front end of detector is detection head, and detection head can be inserted into passageway through through -hole.

[0005] Further, it further includes solid rod, the solid rod can be inserted into blind hole through passageway, and the upper end of solid rod protrudes from the upper end surface of long tube.

[0006] Further, the upper end of the solid rod is provided with a circular truncated cone.

[0007] Further, it further includes a limiting structure, the limiting structure is sleeved on the outer side of the long tube, and a screw that can be inserted into the through -hole is arranged in the limiting structure.

[0008] Further, the limiting structure comprises a sleeve ring, a limiting rod and the screw, the sleeve ring is sleeved outside the long tube, the limiting rod is horizontally connected outside the sleeve ring, the side surface of the sleeve ring is provided with a threaded hole, the screw is connected in the threaded hole, and one end of the screw can be inserted into the through hole.

[0009] Further, the object carrying plate is further provided, the front end of the object carrying plate is provided with a circular tube, the circular tube is inserted into the through hole, the detector can be placed on the object carrying plate, the detection head can be inserted into the channel through the circular tube, and the lower end of the circular tube in the channel is provided with a notch.

[0010] Further, the two sides of the through hole are grooves, and the two sides of the circular tube are protrusions in sliding connection with the grooves.

[0011] Further, the object carrying plate is a box-shaped structure with an opening upward.

[0012] Compared with the prior art, the long tube can provide guidance for the gas in the soil layer under the influence of the change of the airflow and the air pressure outside the long tube, that is, the leaked gas in the soil layer is more likely to enter from the gas inlet and escape from the upper end of the through hole or the channel, which is equivalent to the gas collection function of guiding the gas into the channel, greatly reduces the interference of the combustible gas in the flowing air, and the detection head can detect in the channel of the long tube, so that the gas leakage position can be quickly and accurately determined. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 It is a structural schematic diagram of the present application;

[0015] Figure 2 It is a use state diagram of the present application;

[0016] Figure 3 It is Figure 2 It is an enlarged view of A in the middle;

[0017] Figure 4 It is a structural schematic diagram of the object carrying plate of the present application;

[0018] Figure 5 It is a structural schematic diagram of the chisel head of the present application.

[0019] Wherein: 1, chisel head; 101, air inlet; 102, blind hole; 2, long tube; 201, through hole; 202, groove; 3, solid rod; 301, circular truncated cone; 4, collar; 401, threaded hole; 5, limiting rod; 6, screw; 7, object plate; 8, circular tube; 801, notch; 9, boss; 10, detector; 1001, detection head. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined invention purpose, the specific implementation, structure, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0021] As Figures 1-5As shown, a leakage point detection device for a directly buried gas pipeline comprises a chisel head 1, a long tube 2 and a detector 10, the upper end of the chisel head 1 is provided with a blind hole 102, the side of the chisel head 1 is provided with an air inlet 101 communicating with the blind hole 102, the lower end of the long tube 2 is connected to the blind hole 102 through threads, the middle part of the long tube 2 is a channel, the side of the long tube 2 is provided with through holes 201 communicating with the channel, the through holes 201 are multiple and vertically arranged on the long tube 2, the front end of the detector 10 is a detection head 1001, the detection head 1001 can be inserted into the channel through the through holes 201. The chisel head 1 is made of steel, tungsten steel or hard alloy material, has the characteristics of wear resistance, durability and stable performance, the lower end of the chisel head 1 is conical, can easily break the soil layer, cushion layer and the like above the gas pipeline with the help of external force. The long tube 2 is made of aluminum alloy or hard alloy, is light and solid, is not easy to rust, is convenient to carry and manufacture; under the influence of the change of airflow and air pressure outside the long tube 2, the long tube 2 can guide the gas in the soil layer, that is, the leaked gas in the soil layer is more likely to enter from the air inlet 101 and escape from the through holes 201 or the upper end of the channel, which is equivalent to the function of guiding the gas into the channel; the air inlet 101 can also be arranged on the long tube 2, which is different from the air inlet 101 on the chisel head 1 in terms of manufacturing difficulty and distance from the gas pipeline, although the air inlet 101 on the long tube 2 can reduce the manufacturing difficulty, it is not conducive to approaching the gas pipeline and collecting gas, and if the air inlet 101 is arranged on both the chisel head 1 and the long tube 2, more sand in the soil layer will enter the channel, which will affect the smoothness of the gas entering the channel from the air inlet 101 on the chisel head 1, so it can be seen that it is more reasonable to arrange the air inlet 101 only on the chisel head 1. The detector 10 is a handheld multi-gas detector 10, which integrates multiple sensors such as methane, oxygen, hydrogen sulfide and carbon monoxide, has multiple functions and is suitable for complex environments, is widely used in safety inspection and emergency response, the cost and maintenance cost of the handheld multi-gas detector 10 are much lower than those of professional equipment such as laser methane detector 10, and it is convenient to carry and use, when the device is used for multi-point positioning detection, one handheld multi-gas detector 10 can be equipped for each device and detection can be carried out at the same time, the gas leakage area can be quickly investigated and determined according to the gas concentration, a lot of time can be saved for repair, and the safety of residents' life and property is ensured.

[0022] The device also comprises a solid rod 3, which can be inserted into the blind hole 102 through the channel, the upper end of the solid rod 3 protrudes from the upper end surface of the long tube 2; the lower end of the solid rod 3 abuts against the chisel head 1, the upper end of the solid rod 3 can be hit by a hammer to break the bricks and cushion layer on the pedestrian walkway, which also helps the chisel head 1 to sink into the soil layer, then the detector 10 is connected, gas collection operation is carried out at a position closer to the gas pipeline, and the accuracy of gas detection is improved. The upper end of the solid rod 3 is provided with a circular table 301, which can provide a force position for the hammer to hit, and facilitates the extraction of the solid rod 3 when the chisel head 1 is sunk into place.

[0023] The device also includes a limiting structure, which is sleeved on the outer side of the long pipe 2, and a screw 6 is arranged in the limiting structure and can be inserted into the through hole 201. The limiting structure is adjusted by inserting the screw 6 into different through holes 201 to adjust the position, so that the length of the device entering the ground can be limited, the chisel head 1 can be prevented from chiseling the gas pipeline, and the safety of the device is improved. The limiting structure includes a sleeve ring 4, a limiting rod 5 and the screw 6. The sleeve ring 4 is sleeved on the outer side of the long pipe 2, and the limiting rod 5 is horizontally connected to the outer side of the sleeve ring 4. The sleeve ring 4 is provided with a threaded hole 401 on the side, the screw 6 is connected in the threaded hole 401, and one end of the screw 6 can be inserted into the through hole 201. The sleeve ring 4 is in sliding connection with the long pipe 2. In the case that the direct-buried depth of the gas pipeline is known, the height difference between the top of the gas pipeline and the pedestrian sidewalk can be calculated by a simple calculation, and a certain safety value is subtracted to ensure the safety of construction. The obtained distance from the lower end of the chisel head 1 to the limiting structure is measured by a tape measure and a suitable through hole 201 is selected. The limiting structure is connected and fixed. After the chisel head 1 of the device continuously chisels, the limiting rods 5 on both sides of the limiting structure abut against the ground to declare that the position is reached, so that the sinking depth of each device is consistent and does not change any more, and the accuracy of the measurement result is improved in details.

[0024] The device also includes a carrier plate 7, which is provided with a circular pipe 8 at the front end. The circular pipe 8 is inserted into the through hole 201, and the shape of the front end of the circular pipe 8 corresponds to the inner diameter of the channel. When the circular pipe 8 is completely inserted into the channel, the circular pipe 8 can abut against the side of the channel, so that the stability of installation is improved. There is still a gap between the circular pipe 8 and the channel, so that the normal realization of the guiding and escaping functions of the circular pipe 8 for gas is ensured. The detector 10 can be placed on the carrier plate 7, the detection head 1001 can be inserted into the channel through the circular pipe 8, and the detector 10 does not need to be fixed by a lifting appliance or a clamp, so that the detector 10 is prevented from falling and being damaged. The lower end of the circular pipe 8 in the channel is provided with a notch 801, so that the detection head 1001 can be directly contacted with gas, and the detection speed and the accuracy of the measurement result are improved within the limited sensitivity of the detector 10. The two sides of the through hole 201 are grooves 202, and the two sides of the circular pipe 8 are protrusions. The protrusions and the grooves 202 are in sliding connection, so that the relative rotation of the carrier plate 7 is avoided, and the use safety of the detector 10 is ensured. The carrier plate 7 is a box-shaped structure with an opening upward, and provides a storage space for the detector 10. One end of the box-shaped structure is also provided with an opening, so that the detector 10 is convenient to take and place.

[0025] The working mode of the device is described as follows:

[0026] When a suspected gas pipeline leakage occurs, the regional gas supply is cut off, a warning area is set up on the pedestrian walkway where the gas pipeline is directly buried, and the walkway bricks are opened every 10 meters along the pedestrian walkway to drill and locate, or the chisel head 1 of the device is used to directly break the ground; with the aid of the hammer and solid rod 3, the chisel head 1 breaks the cement pad and soil layer below the walkway bricks and penetrates downward, stops at 0.2 meters above the gas pipeline through the limiting structure, at this time the solid rod 3 is pulled out, the round tube 8 of the carrier plate 7 is inserted into the first through hole 201 in the ground and the detector 10 is placed in the carrier plate 7, the detector 10 is pushed to send the detection head 1001 into the channel; under the influence of external air flow and air pressure changes, more gas in the soil layer passes through the device with relatively small resistance, enters through the air inlet 101 of the chisel head 1 and escapes upward, and real-time data measurement is performed at the detection head 1001; through the measurement of multiple devices at the same time, the approximate position of the gas pipeline leakage can be determined, and then the device is repeatedly detected every 1 meter or 2 meters in the area, further narrowing the position interval, saving a lot of work and time for gas pipeline excavation. Through the detection of the device, the interference of flammable gas in the flowing air is greatly reduced, so that the detection head 1001 can detect in the channel of the long tube 2, quickly and accurately determine the gas leakage position.

[0027] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leak detection device for a directly buried gas pipeline, comprising a chisel, a long pipe, and a detector, characterized in that: The upper end of the chisel head is provided with a blind hole, and the side of the chisel head is provided with an air inlet communicating with the blind hole. The lower end of the long tube is connected to the blind hole by a thread. The middle part of the long tube is a channel, and the side of the long tube is provided with a through hole communicating with the channel. The front end of the detector is a detection head, which can be inserted into the channel through the through hole.

2. The leak detection device for directly buried gas pipelines according to claim 1, characterized in that: It also includes a solid rod, which can be inserted into a blind hole through a channel, with the upper end of the solid rod protruding from the upper end face of the long tube.

3. The leak detection device for directly buried gas pipelines according to claim 2, characterized in that: The solid rod has a frustum at its upper end.

4. The leak detection device for directly buried gas pipelines according to claim 1, characterized in that: It also includes a limiting structure, which is sleeved on the outside of the long tube and has a screw that can be inserted into a through hole.

5. The leak detection device for directly buried gas pipelines according to claim 4, characterized in that: The limiting structure includes a collar, a limiting rod, and a screw. The collar is sleeved on the outside of the long tube, and the limiting rod is horizontally connected to the outside of the collar. The collar has a threaded hole on its side, and the screw is connected to the threaded hole. One end of the screw can be inserted into the through hole.

6. The leak detection device for directly buried gas pipelines according to claim 1, characterized in that: It also includes a carrier plate, the front end of which is provided with a round tube, which is inserted into a through hole. The detector can be placed on the carrier plate, and the detection head can be inserted into the channel through the round tube. The lower end of the round tube located in the channel is provided with a notch.

7. The leak detection device for directly buried gas pipelines according to claim 6, characterized in that: The through hole has grooves on both sides, and the round tube has protrusions on both sides, with the protrusions slidably connected to the grooves.

8. The leak detection device for directly buried gas pipelines according to claim 6, characterized in that: The carrier plate is a box-shaped structure with its opening facing upwards.

Images