A pressure pipeline leak monitoring device

Abstract

The application belongs to the technical field of pipeline engineering, and discloses a pressure pipeline leakage monitoring device, which comprises a pipeline main body, a pressure monitoring table, a mirror, a pressure transmission assembly and a linkage assembly. The pressure monitoring table is threadedly connected to the middle part of the top end of the pipeline main body. The mirror is fixedly installed on the front surface of the pressure monitoring table. The pressure transmission assembly is arranged in the inner cavity of the pressure monitoring table. The linkage assembly is arranged on the pressure monitoring table. The technical scheme is characterized in that a pressure relief pipe and a pressure relief valve are arranged. When the air pressure in the pressure monitoring table is too large, part of the air is concentrated in the pressure relief pipe, thereby pushing the whole pressure relief pipe backward, so that the pressure relief valve is communicated with the outside. At this time, the excess gas in the pressure relief pipe pushes the pressure relief valve to open until the pressure is completely released. When the pressure relief pipe moves backward, the sliding block and the pneumatic rod are also moved backward. Therefore, when the pressure is released, the first spring can pull the pneumatic rod, the sliding block and the whole pressure relief pipe to reset forward, thereby completing the self-pressure relief process and greatly improving the service life.

Description

Technical Field

[0001] This invention belongs to the field of pipeline engineering technology, specifically a pressure pipeline leakage monitoring device. Background Technology

[0002] Pressure pipelines refer to all pipelines that withstand internal or external pressure, regardless of the medium inside. Pressure pipelines are a type of pipeline. Existing pressure pipelines utilize corresponding leak monitoring devices to detect changes in gas pressure within the pipeline and determine if a gas leak has occurred and where it is located. Generally, pressure gauges are used for real-time monitoring, with pressure relief plugs on the back. When the pressure inside the gauge is high, the plug can be removed to release the pressure. However, this requires immediate detection and pressure relief by operators. Because long pipelines often require multiple pressure gauges, it's difficult to detect and relieve pressure immediately, potentially leading to pressure gauges bursting under prolonged high pressure and reducing their lifespan. Therefore, improvements are needed. Summary of the Invention

[0003] To address the problems mentioned in the background section, this invention provides a pressure pipeline leakage monitoring device with the advantages of self-depressurization and improved service life.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pressure pipeline leakage monitoring device, comprising a pipeline body; The pressure monitoring gauge is threaded and fitted into the middle of the top of the pipe body; The mirror is fixedly installed on the front of the pressure monitoring gauge; Pressure transmission assembly, which is located inside the pressure monitoring gauge; The linkage component is located inside the pressure monitoring gauge and inside the pressure transmission component. The pointer is fixedly attached to the front end of the linkage component and the back of the mirror. The first pressure relief assembly is movably installed at the rear end of the pressure monitoring gauge and includes a pressure relief pipe. The pressure relief pipe is movably installed in the middle of the rear end of the pressure monitoring gauge. A pressure relief valve is fixedly installed on the inner wall of the rear end of the pressure relief pipe. Slider blocks located on the inner wall of the pressure monitoring gauge are fixedly installed at the front ends of both sides of the pressure relief pipe. By moving the pressure relief pipe and the pressure relief valve as a whole backward, the pressure relief valve can be exposed to the outside, thereby causing the pressure in the pressure relief pipe to push the pressure relief valve to open and discharge.

[0005] Preferably, the pressure transmission assembly includes a pressure groove and a Bourdon tube; The pressure groove is located in the middle of the bottom of the pressure monitoring gauge, and the Bourdon tube is fixedly connected to one side of the bottom of the inner cavity of the pressure monitoring gauge and is fixedly connected to the pressure groove.

[0006] Preferably, the linkage assembly includes a mounting shaft, a mounting bracket, a gear, a sector toothed plate, a connecting rod, and a return coil spring; The mounting shaft is movably sleeved in the middle of the inner cavity of the pressure monitoring gauge. The mounting bracket is fixedly installed in the inner cavity of the pressure monitoring gauge and the rear end of the mounting shaft. The gear and the return spring are respectively fixedly connected to the rear end of the mounting shaft. The sector toothed plate is movably sleeved below the front end of the mounting bracket and its top meshes with the gear. The connecting rod is hinged to the bottom end of the Bourdon tube and the bottom of one side of the sector toothed plate.

[0007] Preferably, the pressure monitoring gauge has a pneumatic assembly located outside the pressure relief pipe, the pneumatic assembly including an air cylinder, a pneumatic rod and a first spring; The air cylinder is fixedly installed inside the pressure monitoring gauge and at the rear end of the outer side of the pressure relief pipe. The pneumatic rod is movably sleeved in the inner cavity of the air cylinder and its front end is fixedly connected to the slider. The first spring is fixedly installed between the front end of the pneumatic rod and the inner wall of the air cylinder.

[0008] Preferably, a second pressure relief assembly is movably installed in the inner cavity at the top center of the pressure monitoring gauge, the second pressure relief assembly including a cylindrical box and a water-blocking net; The cylindrical box is movably installed in the inner cavity of the top center of the pressure monitoring gauge, and the water-blocking net is fixedly installed on the inner wall of the top of the cylindrical box.

[0009] Preferably, a piston assembly located outside the cylindrical box is fixedly installed inside the pressure monitoring gauge. The piston assembly includes a piston cylinder, a piston rod, and a fixing block. The piston cylinder is fixedly installed inside the pressure monitoring gauge and outside the cylindrical box. The piston rod is movably installed in the inner cavity of the piston cylinder. The fixing block is fixedly installed at the bottom end of the piston rod and below the cylindrical box. A connecting pipe is fixedly connected between the bottom of the outer end of the piston cylinder and the middle of the rear end of the air cylinder.

[0010] Preferably, a clamping assembly located outside the cylindrical box is fixedly installed at the top of the pressure monitoring gauge; the clamping assembly includes a clamping plate and a pull block. The clamping plate is movably installed on the inner wall of the pressure monitoring gauge and the outer side of the cylindrical box, with its inner end extending into the interior of the cylindrical box. The pull block is fixedly installed on the outer end of the clamping plate.

[0011] Preferably, a limiting rod located at the center of the top of the clamping plate is movably installed on the inner wall of the pressure monitoring gauge, and the bottom end of the limiting rod is movably sleeved with the clamping plate.

[0012] Preferably, the bottom end of the limiting rod is provided with a power assembly located in the inner cavity of the clamping plate, the power assembly including a rectangular block, a sliding rod and a second spring; The rectangular block is fixedly installed at the bottom of the limiting rod and in the inner cavity of the top of the clamping plate. The sliding rod is fixedly installed inside the inner cavity of the clamping plate and inside the rectangular block. The second spring is fixedly installed between the inner side of the rectangular block and the inner cavity of the clamping plate.

[0013] Preferably, there are two sliding rods, and the two sliding rods are of the same size.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The above technical solution, by setting up a pressure relief pipe and a pressure relief valve, allows some of the air pressure inside the pressure monitoring gauge to concentrate inside the pressure relief pipe when it is too high. This pushes the entire pressure relief pipe backward, allowing the pressure relief valve to connect with the outside. At this time, the excess gas inside the pressure relief pipe pushes the pressure relief valve to open until the pressure is completely released. As the pressure relief pipe moves backward, it also drives the slider and pneumatic rod backward. Therefore, when the pressure is released, the first spring can pull the pneumatic rod, slider, and the entire pressure relief pipe forward to reset, completing the autonomous pressure relief process and greatly improving the service life.

[0015] This invention, by setting up a connecting pipe, a cylindrical box, and a piston rod, allows the gas inside the air cylinder to be pushed into the piston cylinder cavity through the connecting pipe when the pneumatic rod moves backward in the air cylinder cavity. At this time, due to the increased air pressure in the bottom cavity of the piston cylinder, the piston rod and the fixed block can be pushed upward, thereby driving the cylindrical box and the water baffle to move upward. Ultimately, this allows the pressure of the liquid surging between the pressure monitoring gauge and the mirror surface when the pointer rotation angle is too large to be discharged and relieved through the water baffle.

[0016] This invention incorporates a clamping plate and a second spring. Due to the elastic force of the second spring, the two clamping plates can be pushed towards each other, locking the inner end against the inner wall of the cylindrical box. This allows the cylindrical box to be positioned and installed on top of the pressure monitoring gauge. When disassembly is required, the two pull blocks can be pulled to move the two clamping plates in opposite directions until the inner end disengages from the inner wall of the water-blocking mesh, releasing the clamping and fixing of the cylindrical box so that it can be quickly removed and liquid can be added to the cavity between the pressure monitoring gauge and the mirror. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A; Figure 4 This is a cross-sectional view of the pressure relief pipe of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the local structure at point B; Figure 6This is a cross-sectional view of the mounting shaft of the present invention; Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point C; Figure 8 This is a partially enlarged cross-sectional schematic diagram of the pneumatic rod of the present invention.

[0018] In the diagram: 1. Pipe body; 2. Pressure monitoring gauge; 3. Mirror; 401. Pressure groove; 402. Bourdon tube; 501. Mounting shaft; 502. Mounting bracket; 503. Gear; 504. Sector toothed plate; 505. Connecting rod; 506. Return coil spring; 6. Pointer; 701. Pressure relief pipe; 702. Pressure relief valve disc; 703. Slider; 801. Air cylinder; 802. Pneumatic rod; 803. First spring; 9. Connecting pipe; 101. Cylindrical box; 102. Water baffle; 1101. Piston cylinder; 1102. Piston rod; 1103. Fixing block; 1201. Clamping plate; 1202. Pull block; 13. Limiting rod; 1401. Rectangular block; 1402. Sliding rod; 1403. Second spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 8 As shown, the present invention provides a pressure pipeline leakage monitoring device, including a pipeline body 1; Pressure monitoring gauge 2, its threaded connection is fitted to the middle of the top of the main pipe body 1; Mirror 3 is fixedly installed on the front of pressure monitoring gauge 2; The pressure transmission assembly is located inside the pressure monitoring gauge 2; The linkage component is located inside the pressure monitoring gauge 2 and inside the pressure transmission component; Pointer 6 is fixedly attached to the front end of the linkage component and the back of mirror 3; The first pressure relief assembly is movably installed at the rear end of the pressure monitoring gauge 2 and includes a pressure relief pipe 701. The pressure relief pipe 701 is movably installed in the middle of the rear end of the pressure monitoring gauge 2. A pressure relief valve 702 is fixedly installed on the inner wall of the rear end of the pressure relief pipe 701. Slider blocks 703 located on the inner wall of the pressure monitoring gauge 2 are fixedly installed on the front ends of both sides of the pressure relief pipe 701. By moving the pressure relief pipe 701 and the pressure relief valve 702 backward as a whole, the pressure relief valve 702 can be exposed to the outside, thereby causing the pressure in the pressure relief pipe 701 to push the pressure relief valve 702 to open and discharge.

[0021] When the pressure relief pipe 701, slider 703 and pneumatic rod 802 move backward as a whole, the two first springs 803 will be stretched at the same time. When the pressure is released, due to the pulling force of the first springs 803, the pneumatic rod 802, slider 703 and pressure relief pipe 701 can be pulled forward to reset.

[0022] like Figure 2 As shown, the pressure transmission assembly includes a pressure groove 401 and a Bourdon tube 402; The pressure groove 401 is located in the middle of the bottom of the pressure monitoring gauge 2. The Bourdon tube 402 is fixedly connected to one side of the bottom of the inner cavity of the pressure monitoring gauge 2 and is fixedly connected to the pressure groove 401.

[0023] The above scheme is adopted: by setting up a Bourdon tube 402, when the pressure inside the main body of the pipeline 1 enters into the Bourdon tube 402 through the pressure groove 401, the Bourdon tube 402 can move and drive the linkage component to drive the pointer 6 to rotate and read the value.

[0024] like Figure 2 , Figure 4 and Figure 6 As shown, the linkage assembly includes a mounting shaft 501, a mounting bracket 502, a gear 503, a sector toothed plate 504, a connecting rod 505, and a return coil spring 506; Mounting shaft 501 is movably sleeved in the middle of the inner cavity of pressure monitoring gauge 2. Mounting bracket 502 is fixedly installed in the inner cavity of pressure monitoring gauge 2 and the rear end of mounting shaft 501. Gear 503 and return spring 506 are respectively fixedly connected to the rear end of mounting shaft 501. Sector toothed plate 504 is movably sleeved on the lower side of the front end of mounting bracket 502 and its top meshes with gear 503. Connecting rod 505 is hinged to the bottom end of Bourdon tube 402 and the bottom of one side of sector toothed plate 504.

[0025] The above scheme is adopted: by setting a sector toothed plate 504, when the Bourdon tube 402 moves, the connecting rod 505 can drive the sector toothed plate 504 to deflect, which in turn can drive the gear 503, the mounting shaft 501 and the pointer 6 to rotate synchronously.

[0026] like Figure 7 and Figure 8 As shown, the pressure monitoring gauge 2 is equipped with a pneumatic assembly located outside the pressure relief pipe 701. The pneumatic assembly includes an air cylinder 801, a pneumatic rod 802, and a first spring 803. The air cylinder 801 is fixedly installed inside the pressure monitoring gauge 2 and at the rear end of the outer side of the pressure relief pipe 701. The pneumatic rod 802 is movably sleeved in the inner cavity of the air cylinder 801 and its front end is fixedly connected to the slider 703. The first spring 803 is fixedly installed between the front end of the pneumatic rod 802 and the inner wall of the air cylinder 801.

[0027] The above solution is adopted: by setting a first spring 803, when the pneumatic rod 802 moves backward, the first spring 803 can be stretched. At this time, due to the pulling effect of the first spring 803, the subsequent pneumatic rod 802 can be assisted in resetting.

[0028] like Figure 3 As shown, a second pressure relief assembly is movably installed in the inner cavity at the top center of the pressure monitoring gauge 2. The second pressure relief assembly includes a cylindrical box 101 and a water-blocking net 102. The cylindrical box 101 is movably installed in the inner cavity of the top center of the pressure monitoring gauge 2, and the water-blocking net 102 is fixedly installed on the inner wall of the top of the cylindrical box 101.

[0029] The above solution is adopted: by setting up a water-blocking net 102, when the cylindrical box 101 is facing upward, the pressure of the liquid rising between the pressure monitoring gauge 2 and the mirror 3 will be discharged through the water-blocking net 102, and the water-blocking net 102 can also block the liquid to prevent leakage.

[0030] like Figure 3 and Figure 7 As shown, a piston assembly located outside the cylindrical box 101 is fixedly installed inside the pressure monitoring gauge 2. The piston assembly includes a piston cylinder 1101, a piston rod 1102, and a fixing block 1103. The piston cylinder 1101 is fixedly installed inside the pressure monitoring gauge 2 and outside the cylindrical box 101. The piston rod 1102 is movably installed in the inner cavity of the piston cylinder 1101. The fixing block 1103 is fixedly installed at the bottom of the piston rod 1102 and below the cylindrical box 101. A connecting pipe 9 is fixedly connected between the bottom of the outer end of the piston cylinder 1101 and the middle of the rear end of the air cylinder 801.

[0031] Using the above scheme: By setting a piston rod 1102, when the gas in the gas cylinder 801 is introduced into the inner cavity at the bottom of the piston cylinder 1101 through the connecting pipe 9, the piston rod 1102 and the fixed block 1103 can be pushed to drive the cylindrical box 101 to move upward as a whole.

[0032] like Figure 5 As shown, a clamping assembly located on the outside of the cylindrical box 101 is fixedly installed on the top of the pressure monitoring gauge 2. The clamping assembly includes a clamping plate 1201 and a pull block 1202. The clamping plate 1201 is movably installed on the inner wall of the pressure monitoring gauge 2 and the outer side of the cylindrical box 101, with its inner end extending into the interior of the cylindrical box 101. The pull block 1202 is fixedly installed on the outer end of the clamping plate 1201.

[0033] The above solution is adopted: by setting up pull blocks 1202, the operator can pull the two pull blocks 1202 to drive the two clamping plates 1201 to move in opposite directions to release the clamping and fixing of the cylindrical box 101.

[0034] like Figure 5 As shown, a limiting rod 13 located at the top center of the clamping plate 1201 is movably installed on the inner wall of the pressure monitoring gauge 2. The bottom end of the limiting rod 13 is movably sleeved with the clamping plate 1201.

[0035] The above solution is adopted: by setting a limit rod 13, when the cylindrical box 101 moves upward as a whole, the clamping plate 1201 and the pull block 1202 can move upward under the limit of the limit rod 13.

[0036] like Figure 5 As shown, the bottom end of the limiting rod 13 is provided with a power assembly located in the inner cavity of the clamping plate 1201. The power assembly includes a rectangular block 1401, a sliding rod 1402, and a second spring 1403. A rectangular block 1401 is fixedly installed at the bottom of the limiting rod 13 and the top cavity of the clamping plate 1201. A sliding rod 1402 is fixedly installed inside the cavity of the clamping plate 1201 and the rectangular block 1401. A second spring 1403 is fixedly installed between the inner side of the rectangular block 1401 and the cavity of the clamping plate 1201. There are two sliding rods 1402, and the two sliding rods 1402 are the same size.

[0037] The above solution is adopted: by setting a second spring 1403, the elastic force of the two second springs 1403 can push the two clamping plates 1201 to move towards each other as a whole.

[0038] Working principle and usage process of this invention: First, the operator can pull the two pull blocks 1202 to move the two clamping plates 1201 in opposite directions to release the clamping and fixing of the cylindrical box 101. Then, the cylindrical box 101 can be disassembled. Then, the corresponding liquid can be added through the inner cavity of the top of the pressure monitoring gauge 2 into the cavity between the pressure monitoring gauge 2 and the mirror 3, so that the pointer 6 can rotate stably to read the value. Then, the cylindrical box 101 is installed. The second spring 1403 pushes the two clamping plates 1201 towards each other to clamp and fix them. Finally, the bottom end of the pressure monitoring gauge 2 is rotated to the top of the pipe body 1 for threaded connection installation.

[0039] Subsequently, when the gas enters the Bourdon tube 402 through the pressure groove 401, it can cause the drive linkage 505 to drive the sector tooth plate 504 to deflect, thereby causing the gear 503, the mounting shaft 501 and the pointer 6 to rotate synchronously. At this time, the pressure will be proportional to the rotation angle of the pointer 6, and the corresponding gas pressure value can be obtained.

[0040] When the internal air pressure of pressure monitoring gauge 2 is too high, some of the air pressure will push the pressure relief pipe 701 backward, which will cause the gas to push the pressure relief valve 702 to flip and discharge for self-decompression. At the same time, the rotation angle of pointer 6 is also large due to the high pressure, which will cause the liquid in the cavity between pressure monitoring gauge 2 and mirror 3 to surge upward and generate overpressure. When the pressure relief pipe 701 moves backward, it will cause the slider 703 and the pneumatic rod 802 to push the gas in the air cylinder 801 backward and introduce it into the bottom cavity of the piston cylinder 1101. The increased air pressure can push the piston rod 1102 and the fixed block 1103 to drive the cylindrical box 101 to move upward. Then the surged pressure can be discharged through the water baffle 102. After the pressure is released, the pneumatic rod 802 and slider 703 can be reset by the pulling force of the first spring 803 for subsequent pressure relief.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure pipeline leakage monitoring device, characterized in that, Including the main body of the pipeline (1); Pressure monitoring gauge (2), its threaded sleeve is fitted to the middle of the top of the pipe body (1); The mirror (3) is fixedly installed on the front of the pressure monitoring gauge (2); The pressure transmission assembly is located inside the pressure monitoring gauge (2); The linkage component is located inside the pressure monitoring gauge (2) and inside the pressure transmission component; The pointer (6) is fixedly attached to the front end of the linkage component and the back of the mirror (3); The first pressure relief assembly is movably installed at the rear end of the pressure monitoring meter (2) and includes a pressure relief pipe (701). The pressure relief pipe (701) is movably installed in the middle of the rear end of the pressure monitoring meter (2). A pressure relief valve (702) is fixedly installed on the inner wall of the rear end of the pressure relief pipe (701). A slider (703) located on the inner wall of the pressure monitoring meter (2) is fixedly installed on the front ends of both sides of the pressure relief pipe (701). By moving the pressure relief pipe (701) and the pressure relief valve (702) backward as a whole, the pressure relief valve (702) can be exposed to the outside, thereby causing the pressure in the pressure relief pipe (701) to push the pressure relief valve (702) to open and discharge. The pressure monitoring gauge (2) is equipped with a pneumatic assembly located outside the pressure relief pipe (701). The pneumatic assembly includes an air cylinder (801), a pneumatic rod (802), and a first spring (803). The air cylinder (801) is fixedly installed inside the pressure monitoring gauge (2) and at the rear end of the outer side of the pressure relief pipe (701). The pneumatic rod (802) is movably sleeved in the inner cavity of the air cylinder (801) and its front end is fixedly connected to the slider (703). The first spring (803) is fixedly installed between the front end of the pneumatic rod (802) and the inner wall of the air cylinder (801). The pressure monitoring gauge (2) has a second pressure relief assembly installed in the inner cavity at the top center. The second pressure relief assembly includes a cylindrical box (101) and a water-blocking net (102). The cylindrical box (101) is movably installed in the inner cavity of the top center of the pressure monitoring gauge (2), and the water-blocking net (102) is fixedly installed on the inner wall of the top of the cylindrical box (101); The pressure monitoring gauge (2) has a piston assembly fixedly installed inside, located outside the cylindrical box (101). The piston assembly includes a piston cylinder (1101), a piston rod (1102), and a fixing block (1103). The piston cylinder (1101) is fixedly installed inside the pressure monitoring gauge (2) and outside the cylindrical box (101). The piston rod (1102) is movably installed in the inner cavity of the piston cylinder (1101). The fixing block (1103) is fixedly installed at the bottom of the piston rod (1102) and below the cylindrical box (101). A connecting pipe (9) is fixedly connected between the bottom of the outer end of the piston cylinder (1101) and the middle of the rear end of the air cylinder (801). By setting up a water-blocking net (102), when the cylindrical box (101) is facing upwards, the pressure of the liquid rising between the pressure monitoring gauge (2) and the mirror (3) will be discharged through the water-blocking net (102), and the water-blocking net (102) can also block the liquid to prevent leakage.

2. The pressure pipeline leakage monitoring device according to claim 1, characterized in that: The pressure transmission assembly includes a pressure groove (401) and a Bourdon tube (402). The pressure groove (401) is located in the middle of the bottom of the pressure monitoring gauge (2). The Bourdon tube (402) is fixedly connected to one side of the bottom of the inner cavity of the pressure monitoring gauge (2) and is fixedly connected to the pressure groove (401).

3. The pressure pipeline leakage monitoring device according to claim 1, characterized in that: The linkage assembly includes a mounting shaft (501), a mounting bracket (502), a gear (503), a sector toothed plate (504), a connecting rod (505), and a return coil spring (506). The mounting shaft (501) is movably sleeved in the middle of the inner cavity of the pressure monitoring gauge (2). The mounting bracket (502) is fixedly installed in the inner cavity of the pressure monitoring gauge (2) and the rear end of the mounting shaft (501). The gear (503) and the reset coil spring (506) are respectively fixedly connected to the rear end of the mounting shaft (501). The fan-shaped toothed plate (504) is movably sleeved below the front end of the mounting bracket (502) and its top meshes with the gear (503). The connecting rod (505) is hinged to the bottom end of the Bourdon tube (402) and the bottom of one side of the fan-shaped toothed plate (504).

4. The pressure pipeline leakage monitoring device according to claim 1, characterized in that: The pressure monitoring gauge (2) is fixedly mounted with a clamping assembly located outside the cylindrical box (101) at its top. The clamping assembly includes a clamping plate (1201) and a pull block (1202). The clamping plate (1201) is movably installed on the inner wall of the pressure monitoring gauge (2) and the outer side of the cylindrical box (101), with its inner end extending into the interior of the cylindrical box (101). The pull block (1202) is fixedly installed on the outer end of the clamping plate (1201).

5. The pressure pipeline leakage monitoring device according to claim 1, characterized in that: The inner wall of the pressure monitoring gauge (2) is movably fitted with a limiting rod (13) located at the middle of the top of the clamping plate (1201), and the bottom end of the limiting rod (13) is movably sleeved with the clamping plate (1201).

6. The pressure pipeline leakage monitoring device according to claim 5, characterized in that: The bottom end of the limiting rod (13) is provided with a power assembly located in the inner cavity of the clamping plate (1201). The power assembly includes a rectangular block (1401), a sliding rod (1402), and a second spring (1403). The rectangular block (1401) is fixedly installed at the bottom of the limiting rod (13) and the top cavity of the clamping plate (1201). The sliding rod (1402) is fixedly installed inside the cavity of the clamping plate (1201) and the rectangular block (1401). The second spring (1403) is fixedly installed between the inner side of the rectangular block (1401) and the cavity of the clamping plate (1201).

7. The pressure pipeline leakage monitoring device according to claim 6, characterized in that: There are two sliding rods (1402), and the two sliding rods (1402) are the same size.

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