Urban gas low-pressure pipeline micro-leakage monitoring device

Abstract

The utility model relates to gas leakage digital electronic instrument monitoring technical field, concretely is a kind of town gas low pressure pipeline microleakage monitoring device, including monitoring machine, the conduit is installed in monitoring machine outside, the cavity block is installed in conduit middle end;It further includes sensing component;For early warning when conduit leaks;Transmission mechanism, for the sensing effect of sensing component is promoted;The sensing component includes: elastic diaphragm, the elastic diaphragm one end fixed mounting is in the side of cavity block, by the setting of sensing component, conduit microleakage makes the pressure change in cavity block, elastic diaphragm deformation, drive a series of components action: moving ring slides, through rack, gear, threaded rod one transmission, make fixed block go up, movable rod swing knock alarm bell;When moving ring right slide, resist bar triggers microswitch, resist touch strip promotes gas lock to start, monitoring machine closes gas valve, so prevent microleakage to develop into major hidden danger, improve the accuracy and timeliness of monitoring.

Description

Technical Field

[0001] This utility model relates to the field of gas leak monitoring technology, specifically a micro-leakage monitoring device for low-pressure gas pipelines in urban areas. Background Technology

[0002] With the acceleration of urbanization, natural gas, as a clean and efficient energy source, is increasingly widely used in urban areas, and the scale of gas pipeline networks is constantly expanding. Low-pressure gas pipelines in urban areas are ubiquitous, covering streets, residential areas, and commercial districts, directly impacting residents' daily lives and the safe operation of the city. However, due to factors such as pipeline aging, corrosion, and damage from third-party construction, micro-leakage accidents in low-pressure gas pipelines occur frequently. If these micro-leakages are not detected and addressed promptly, they not only waste gas resources but may also accumulate into safety hazards, even triggering serious accidents such as explosions and fires, threatening public safety and the safety of life and property. Therefore, we have developed a low-pressure pipeline micro-leakage monitoring device, a digital television testing instrument.

[0003] However, existing micro-leakage monitoring technologies for low-pressure gas pipelines in urban areas have many shortcomings. On the one hand, when a micro-leak occurs in a low-pressure gas pipeline, the leakage amount is often small, and the resulting pressure change is very weak. Conventional monitoring methods are unlikely to accurately capture these subtle changes, resulting in insufficient monitoring accuracy and difficulty in detecting problems in the early stages of leakage, thus missing the best opportunity for handling.

[0004] On the other hand, the inability to quickly and accurately identify minute pressure changes caused by micro-leaks results in a significant lag in the response of the entire monitoring system, preventing timely warnings and corresponding measures. Once a micro-leak continues to develop and the leaked gas accumulates to a certain extent, it can easily cause serious accidents such as fires, explosions, or poisoning, posing a huge threat to public safety and seriously affecting the effective implementation of urban gas safety management. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a micro-leakage monitoring device for low-pressure urban gas pipelines, which solves the problems of insufficient monitoring accuracy and delayed response in existing micro-leakage monitoring of low-pressure urban gas pipelines mentioned in the background art, due to the small leakage amount and weak pressure changes.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a micro-leakage monitoring device for low-pressure urban gas pipelines, comprising a monitoring unit, a conduit mounted on the outside of the monitoring unit, and a cavity block mounted in the middle of the conduit; further comprising a sensing component for providing early warning when the conduit leaks; and a transmission mechanism for enhancing the sensing effect of the sensing component; the sensing component comprises: an elastic diaphragm, one end of which is fixedly mounted on one side of the cavity block, and the other end of which penetrates the cavity block; a fixing block is provided at the top of the conduit, a movable rod is hinged to the inner side of the fixing block, a connecting block is hinged to the middle of the movable rod, a connecting pipe is fixedly mounted on the outside of the conduit, an electrical signal device is mounted on the surface of the connecting pipe, a connecting shaft is fixedly mounted on the outside of the electrical signal device, and a micro switch is slidably connected inside the connecting shaft.

[0007] Preferably, a reset spring is fixedly mounted on the surface of the micro switch, and the reset spring is fixedly mounted on the outside of the connecting shaft.

[0008] Preferably, an alarm bell is installed on the top of the electrical signal, and an airlock is slidably connected to the outside of the electrical signal.

[0009] Preferably, the transmission mechanism includes: a fixed bar, which is installed on the outside of the elastic diaphragm, a movable ring is installed on the surface of the fixed bar, the movable ring is slidably connected to the surface of the guide tube, and a rack is installed at the bottom of the movable ring.

[0010] Preferably, a fixing frame is installed at the bottom of the cavity block, and a gear is rotatably connected to the top of the fixing frame. The gear meshes with the outside of the rack. A threaded rod is installed on the top of the gear. The threaded rod passes through the guide tube. The fixing block is threadedly connected to the surface of the threaded rod. A threaded rod is threadedly connected to the bottom of the connecting block. The threaded rod is rotatably connected to the top of the electrical signal device.

[0011] Preferably, a stop bar is installed on the right side of the rack, and an abutment bar is installed on the right side of the movable ring, with the abutment bar installed at the bottom of the airlock.

[0012] Preferably, the cross-section of the fixing frame is L-shaped, and a sliding groove is provided on the inner side of the fixing frame.

[0013] As can be seen from the above technical solutions, the micro-leakage monitoring device for low-pressure urban gas pipelines provided in this specification has at least the following beneficial effects: 1. This utility model, through the setting of the sensing component, when the micro-leakage of the catheter causes a change in the pressure inside the cavity, the elastic diaphragm deforms, driving a series of components to move: the moving ring slides, and through the transmission of the rack, gear, and threaded rod, the fixed block moves upward, and the movable rod swings to strike the alarm bell; when the moving ring slides to the right, the abutment rod triggers the micro switch, the abutment strip pushes the gas stop lock to start, and the monitoring machine closes the gas valve. In this way, the micro-leakage is prevented from developing into a major hidden danger, the accuracy and timeliness of monitoring are improved, and the safety risks are reduced.

[0014] 2. Through the transmission mechanism, when the conduit leaks, the elastic diaphragm contacts the moving ring, which drives the rotation of the threaded rod, the movement of the abutment rod and the contact strip. This can improve the accurate capture and amplification of micro-pressure changes, and timely detect potential dangers, thereby enhancing the early warning capability of the monitoring machine. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application: Figure 1 This is a schematic diagram of the overall front view of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the cavity block of this utility model; Figure 3 This is a front view schematic diagram of the sensing component in this utility model; Figure 4 This is a front view structural diagram of the transmission mechanism in this utility model; Figure 5 This is a front view schematic diagram of the fixing frame in this utility model.

[0016] In the diagram: 1. Monitoring unit; 2. Conduit; 3. Lumen block; 4. Sensing component; 41. Elastic diaphragm; 42. Fixed block; 43. Movable rod; 44. Connecting pipe; 45. Electrical signal device; 46. Connecting shaft; 47. Micro switch; 48. Return spring; 49. Alarm bell; 410. Airlock; 411. Connecting block; 5. Transmission mechanism; 51. Fixed bar; 52. Moving ring; 53. Rack; 54. Fixed frame; 55. Gear; 56. Threaded rod one; 57. Threaded rod two; 58. Abutment rod; 59. Abutment bar; 540. Slide groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 - Figure 5 As shown, the present invention provides a technical solution: a micro-leakage monitoring device for low-pressure urban gas pipelines, including a monitoring unit 1, a conduit 2 installed on the outside of the monitoring unit 1, and a cavity block 3 installed in the middle of the conduit 2; It also includes sensing component 4; used to provide early warning in case of leakage in conduit 2; The transmission mechanism 5 is used to enhance the sensing effect of the sensing component 4; First, the sensing component 4 includes: an elastic diaphragm 41, one end of which is fixedly installed on one side of the cavity block 3, and the other end of which passes through the cavity block 3. A fixing block 42 is provided at the top of the conduit 2, and a movable rod 43 is hinged to the inner side of the fixing block 42. A connecting block 411 is hinged to the middle end of the movable rod 43. A connecting pipe 44 is fixedly installed on the outer side of the conduit 2, and an electrical signal device 45 is installed on the surface of the connecting pipe 44. A connecting shaft 46 is fixedly installed on the outer side of the electrical signal device 45, and a micro switch 47 is slidably connected inside the connecting shaft 46. The elastic diaphragm 41 is made of a highly elastic and aging-resistant diaphragm material. By sealing the elastic diaphragm 41 inside the conduit 2 and the cavity block 3, and exposing the other side to the atmosphere or reference pressure environment, a pressure difference sensitive surface is formed. When a micro-leak occurs inside the conduit 2, the internal pressure drops, and the elastic diaphragm 41 undergoes a slight deformation under the action of the pressure difference on both sides. The elastic characteristics of the elastic diaphragm 41 ensure that it is highly sensitive to low pressure changes and has good resilience to adapt to pressure fluctuations.

[0019] Secondly, a reset spring 48 is fixedly installed on the surface of the micro switch 47. The reset spring 48 is fixedly installed on the outside of the connecting shaft 46. By fixing the reset spring 48 on the surface of the micro switch 47, the effect of resetting the micro switch 47 after it is triggered can be achieved.

[0020] Furthermore, an alarm bell 49 is installed on the top of the electrical signal 45, and a gas lock 410 is slidably connected to the outside of the electrical signal 45. The mechanical displacement is converted into an electrical signal by a micro switch 47, which can be remotely transmitted to the gas lock 410 to cut off the gas supply.

[0021] Furthermore, the transmission mechanism 5 includes: a fixed bar 51, which is installed on the outside of the elastic diaphragm 41; a movable ring 52 is installed on the surface of the fixed bar 51; the movable ring 52 is slidably connected to the surface of the conduit 2; a rack 53 is installed at the bottom of the movable ring 52; the transmission mechanism 5 is made of lightweight and high-strength material and follows the principle of mechanical amplification to amplify the minute displacement of the elastic diaphragm 41 by tens or even hundreds of times; a fixed frame 54 is installed at the bottom of the cavity block 3; a gear 55 is rotatably connected to the top of the fixed frame 54; the gear 55 meshes with the outside of the rack 53; a threaded rod 56 is installed at the top of the gear 55; the threaded rod 56 passes through the conduit 2; a fixed block 42 is threadedly connected to the surface of the threaded rod 56; a threaded rod 57 is threadedly connected to the bottom of the connecting block 411; the threaded rod 57 is rotatably connected to the top of the electrical signal 45; a stop rod 58 is installed on the right side of the rack 53; a stop bar 59 is installed on the right side of the movable ring 52; and the stop bar 59 is installed at the bottom of the airlock 410.

[0022] Finally, the cross-section of the fixing frame 54 is L-shaped, and a sliding groove 540 is provided on the inner side of the fixing frame 54. The L-shaped fixing frame 54 can improve the connection between the fixing frame 54 and the monitoring machine 1. The sliding groove 540 on the top of the fixing frame 54 can also drive the rack 53 to slide on the top of the fixing frame 54.

[0023] In the use of this utility model's micro-leakage monitoring device for low-pressure urban gas pipelines, under normal leak-free conditions, one end of the elastic diaphragm 41 is fixed to one side of the cavity block 3, while the other end penetrates the cavity block 3, remaining in a relatively stable static state. The fixed block 42, movable rod 43, connecting block 411, and other components at the top of the conduit 2 are also in their initial relative positions. The movable rod 43 can rotate flexibly through a hinge structure, and the connecting block 411 maintains the corresponding posture. The electrical signal 45 is mounted on the surface of the connecting pipe 44, and the micro switch 47 inside the connecting shaft 46 on its outer side is in a reset state. Under the action of spring 48, the device is in its initial position, the alarm bell 49 is in an untriggered state, and the gas stop lock 410 also maintains its original state. The entire sensing assembly 4 is on standby to monitor for gas leaks. When a micro-leak occurs in the conduit 2, the leaked gas enters the chamber 3, causing a change in the pressure inside the chamber 3. Since one end of the elastic diaphragm 41 is fixed to the chamber 3, under the action of the pressure difference, the elastic diaphragm 41 will deform, and its end penetrating the chamber 3 will move accordingly. The movement of the elastic diaphragm 41 will cause it to abut against the moving ring 52 on the surface of the conduit 2 via the fixing strip 51. When the moving ring 52 slides, it causes the rack 53 at the bottom to slide. When the rack 53 slides, it causes the inner meshing gear 55 to rotate. When the gear 55 rotates, it causes the threaded rod 56 to rotate. When the threaded rod 56 rotates, it causes the fixed block 42 connected to its surface threaded to move upward. When the fixed block 42 moves upward, it causes one end of the movable rod 43 to move upward. When one end of the movable rod 43 moves upward, the part of the movable rod 43 connected by the connecting block 411 in the middle will swing downward, so that the movable rod 43 strikes the alarm bell 49. At the top, when the moving ring 52 slides to the right, it will drive the abutment 58 to move. The abutment 58 will abut against the surface of the micro switch 47 to trigger it. When the moving ring 52 slides to the right, it will also drive the abutment strip 59 to move. When the abutment strip 59 moves, it will push the gas lock 410 to activate, thereby achieving the effect of the monitoring machine 1 closing the gas valve. This prevents the micro-leakage of the conduit 2 from becoming a major hidden danger in gas safety management. Once the leak continues to develop, it may cause fire, explosion or poisoning accidents. This improves the stability and efficiency of the monitoring machine 1 and reduces safety hazards.

[0024] The above embodiments are only used to illustrate the present utility model, and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A micro-leakage monitoring device for low-pressure urban gas pipelines, comprising a monitoring unit (1), characterized in that: The monitoring machine (1) is equipped with a conduit (2) on its outer side, and a cavity block (3) is installed in the middle of the conduit (2). It also includes a sensing component (4); used to provide early warning in case of leakage in the conduit (2); The transmission mechanism (5) is used to enhance the sensing effect of the sensing component (4); The sensing component (4) includes: an elastic diaphragm (41), one end of which is fixedly installed on one side of the cavity block (3), and the other end of which passes through the cavity block (3); a fixing block (42) is provided at the top of the conduit (2); a movable rod (43) is hinged to the inner side of the fixing block (42); a connecting block (411) is hinged to the middle end of the movable rod (43); a connecting pipe (44) is fixedly installed on the outer side of the conduit (2); an electrical signal device (45) is installed on the surface of the connecting pipe (44); a connecting shaft (46) is fixedly installed on the outer side of the electrical signal device (45); and a micro switch (47) is slidably connected inside the connecting shaft (46).

2. The micro-leakage monitoring device for low-pressure urban gas pipelines according to claim 1, characterized in that: A reset spring (48) is fixedly mounted on the surface of the micro switch (47), and the reset spring (48) is fixedly mounted on the outside of the connecting shaft (46).

3. The micro-leakage monitoring device for low-pressure urban gas pipelines according to claim 1, characterized in that: An alarm bell (49) is installed on the top of the electrical signal (45), and an airlock (410) is slidably connected to the outside of the electrical signal (45).

4. The micro-leakage monitoring device for low-pressure urban gas pipelines according to claim 1, characterized in that: The transmission mechanism (5) includes: a fixing bar (51), which is installed on the outside of the elastic diaphragm (41), and a moving ring (52) is installed on the surface of the fixing bar (51). The moving ring (52) is slidably connected to the surface of the guide tube (2), and a rack (53) is installed at the bottom of the moving ring (52).

5. The micro-leakage monitoring device for low-pressure urban gas pipelines according to claim 1, characterized in that: The bottom of the cavity block (3) is equipped with a fixing frame (54), and the top of the fixing frame (54) is rotatably connected to a gear (55). The gear (55) meshes with the outside of the rack (53). The top of the gear (55) is equipped with a threaded rod (56), which passes through the guide tube (2). The fixing block (42) is threadedly connected to the surface of the threaded rod (56). The bottom of the connecting block (411) is threadedly connected to a threaded rod (57), which is rotatably connected to the top of the electrical signal machine (45).

6. The micro-leakage monitoring device for low-pressure urban gas pipelines according to claim 4, characterized in that: A stop bar (58) is installed on the right side of the rack (53), and an abutment bar (59) is installed on the right side of the moving ring (52). The abutment bar (59) is installed at the bottom of the airlock (410).

7. A micro-leakage monitoring device for low-pressure urban gas pipelines according to claim 5, characterized in that: The cross-section of the fixing frame (54) is L-shaped, and a sliding groove (540) is provided on the inner side of the fixing frame (54).

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