A pipeline pressure gauge with a pressure alarm structure

Abstract

The present invention provides a pipeline pressure gauge with a pressure alarm structure, relating to the technical field of pressure gauges, including: a pressure gauge installation pipe, at both ends of the pressure gauge installation pipe, there is respectively welded a docking flange, on the pipe wall of the pressure gauge installation pipe, there are four installation sockets opened, the axis of the installation socket is perpendicular to the axis of the pressure gauge installation pipe, and two inner docking pipes are tightly inserted into the four installation sockets, which can avoid the leakage of the objects inside the pressure gauge installation pipe. Through the action of the automatic closed pressure gauge installation structure, it is not necessary to close the pipeline through an external valve before the pressure gauge is disassembled, making the pipeline structure design simpler and facilitating the maintenance of the pipeline. It solves the problem that when performing maintenance or replacement, it is necessary to close the valve connecting the main pipeline and the pipeline where the pressure gauge is installed to avoid the leakage of the medium inside the pipeline after the pressure gauge is disassembled. The additional installation of a valve will increase the cost of pipeline construction and make the disassembly and maintenance process of the pressure gauge more cumbersome.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure gauges, and in particular to a pipeline pressure gauge with a pressure alarm structure. Background Art

[0002] A pressure gauge is an instrument that uses an elastic element as a sensitive element to measure and indicate a pressure higher than the ambient pressure. It is extremely widely used, almost covering all industrial processes and scientific research fields. Pressure gauges are widely used in industries, automobiles, and daily life, etc.

[0003] Traditional pressure gauges are generally externally connected to pipelines through pipes. When the pressure gauge is disassembled, the medium inside the pipeline will quickly leak through the installation port of the pressure gauge, causing unnecessary trouble. Therefore, when performing maintenance or replacement, it is necessary to close the valve connecting the main pipeline and the pipeline where the pressure gauge is installed to avoid the leakage of the medium inside the pipeline after the pressure gauge is disassembled. The additional installation of the valve will increase the cost of pipeline construction and make the disassembly and maintenance process of the pressure gauge more cumbersome. Summary of the Invention

[0004] The embodiments of the present disclosure relate to a pipeline pressure gauge with a pressure alarm structure to solve the problem that traditional pressure gauges are generally externally connected to pipelines through pipes. When the pressure gauge is disassembled, the medium inside the pipeline will quickly leak through the installation port of the pressure gauge, causing unnecessary trouble. Therefore, when performing maintenance or replacement, it is necessary to close the valve connecting the main pipeline and the pipeline where the pressure gauge is installed to avoid the leakage of the medium inside the pipeline after the pressure gauge is disassembled. The additional installation of the valve will increase the cost of pipeline construction and make the disassembly and maintenance process of the pressure gauge more cumbersome.

[0005] In a first aspect of the present disclosure, there is provided a pipeline pressure gauge with a pressure alarm structure, specifically including: a pressure gauge installation pipe, at both ends of the pressure gauge installation pipe, there is a butt flange welded respectively. There are four installation sockets opened on the wall of the pressure gauge installation pipe, and the axis of the installation socket is perpendicular to the axis of the pressure gauge installation pipe. Two inner butt pipes are closely inserted into the four installation sockets. The lower end of the inner butt pipe is fixedly connected with a positioning arc plate, and the upper surface of the positioning arc plate fits with the outer surface of the pressure gauge installation pipe. An active plug is slidably connected inside the inner butt pipe. A pressure detection gauge and a pressure limiting valve are respectively installed on the two inner butt pipes. Above the two positioning arc plates, an arc plate connection plate is installed through bolts, and two alarms are fixedly connected to the arc plate connection plate.

[0006] In at least some embodiments, an inner pipe cavity is opened below the inside of the inner butt pipe, and a butt pipe thread is machined above the inside of the inner butt pipe.

[0007] In at least some embodiments, a sealing wedge ring is opened at the lower edge of the butt pipe thread, and four communication pipe orifices with a square hole structure are opened on the wall of the inner butt pipe.

[0008] In at least some embodiments, arc-shaped flange edges are respectively bent and processed on the front edge and the rear edge of the positioning arc plate, and arc-shaped plate connection holes with circular hole structures are formed in the arc-shaped flange edges.

[0009] In at least some embodiments, a plug wedge edge is processed on the edge of the upper surface of the movable plug block. The plug wedge edge is attached to the sealing wedge ring. The movable plug block is slidably connected inside the inner pipe cavity, and two plug block support columns are provided on the edge of the upper surface of the movable plug block.

[0010] In at least some embodiments, a cavity is formed at the bottom of the movable plug block, and a plug block top spring is fixedly connected to the inner surface of the cavity at the bottom of the movable plug block. The lower end of the plug block top spring is fixedly connected to the upper surface of the positioning arc plate.

[0011] In at least some embodiments, a pressure gauge screw joint is fixedly connected to the input end of the pressure detection gauge, and the pressure gauge screw joint is screwed into the docking pipe thread of the inner docking pipe located on the left.

[0012] In at least some embodiments, a valve body screw joint is fixedly connected to the input end of the pressure limiting valve, and the valve body screw joint is screwed into the docking pipe thread of the inner docking pipe located on the right.

[0013] In at least some embodiments, the lower surface of the arc-shaped plate connection plate is attached to the outer surface of the pressure gauge installation pipe. Arc-shaped flange edges are respectively bent and processed on the front edge and the rear edge of the arc-shaped plate connection plate, and connection plate connection holes are formed in the arc-shaped flange edges.

[0014] In at least some embodiments, two alarm lights are installed on the alarm. The alarm lights are connected to the alarm through electrical connection lines. The alarm is connected to a liquid control trigger valve through an electrical connection line. The liquid control trigger valve is installed on the overflow pipe of the pressure limiting valve.

[0015] The present invention provides a pipeline type pressure gauge with a pressure alarm structure, which has the following beneficial effects:

[0016] The pressure gauge in the present invention is installed in the pressure gauge installation pipe through a new docking structure. In the normal installation state of the pressure detection gauge, the spiral connecting pipe of the pressure gauge is spirally connected to the docking pipe thread. The upper end of the plug block support column fits against the lower end face of the docking pipe thread, and pushes the movable plug block downward, compressing the plug block top spring. The plug block wedge edge separates from the sealing wedge ring, enabling the communication nozzle to connect the inside and outside of the inner docking pipe, connecting the pressure detection gauge to the pressure gauge installation pipe, and detecting the internal pressure of the pressure gauge installation pipe. When disassembling the pressure detection gauge, rotate and disassemble the pressure detection gauge to move the spiral connecting pipe of the pressure gauge upward. The movable plug block moves upward under the action of the plug block top spring to block the communication nozzle, disconnecting the inside of the inner docking pipe from the inside of the pressure gauge installation pipe, which can prevent the leakage of objects inside the pressure gauge installation pipe. Through the action of the automatic closed pressure gauge installation structure, there is no need to close the pipeline through an external valve before disassembling the pressure gauge, making the pipeline structure design simpler and facilitating pipeline maintenance.

[0017] In addition, a pressure limiting valve is installed on the pipeline type pressure gauge in the present invention. When the pressure is higher than the highest set pressure of the pressure limiting valve, the pressure limiting valve automatically opens to control the pressure inside the pressure gauge and the pipeline, preventing excessive pressure from damaging the pressure gauge or the pipeline. At the same time, an alarm mechanism is provided. When the pressure limiting valve is activated, the liquid discharged triggers the liquid control trigger valve connected to the discharge port of the pressure limiting valve, causing the alarm to start and emit an alarm sound, and at the same time emitting alarm light through the alarm lamp, which is used to remind the maintenance personnel to adjust the pipeline pressure and has a pressure alarm function, facilitating pipeline maintenance and repair.

[0018] In addition, in the present invention, the arc plate connecting plate is fixedly connected to the two positioning arc plates through bolts, enabling the two positioning arc plates to be fixedly attached to the outer surface of the pressure gauge installation pipe and maintaining a fixed fit, which can further improve the installation stability of the inner docking pipe and the positioning arc plates, preventing the inner docking pipe from detaching from the pressure gauge installation pipe under the action of external force or internal hydraulic pressure. The pipeline type pressure gauge in this application combines the pressure gauge and the pipeline into one. During manufacturing, the pressure gauge installation pipe, inner docking pipe, positioning arc plates, movable plug block, and arc plate connecting plate can be manufactured separately. After manufacturing, assembling multiple single components can complete the manufacturing of the pipeline type pressure gauge, which is convenient for manufacturing, assembling, and has a firm installation. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0020] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0021] In the drawings:

[0022] Figure 1 A schematic diagram showing the overall structure of the present application is shown;

[0023] Figure 2 Shows a schematic structural view of the bottom of the present application;

[0024] Figure 3 Shows a schematic structural view of the present application in a disassembled state;

[0025] Figure 4 Shows the present application Figure 3 of the schematic structural view of the bottom;

[0026] Figure 5 Shows a schematic structural view of the inside of the pressure gauge installation pipe of the present application;

[0027] Figure 6 Shows a schematic structural view of the present application after the internal docking pipe is disassembled;

[0028] Figure 7 Shows a schematic structural view of the inside of the internal docking pipe of the present application;

[0029] Figure 8 Shows a schematic structural view of the alarm of the present application;

[0030] Figure 9 Shows the present application Figure 5 of the enlarged partial structural view at location A;

[0031] Figure 10 Shows the present application Figure 6 of the enlarged partial structural view at location B.

[0032] List of reference numerals

[0033] 1. Pressure gauge installation pipe; 101. Installation socket; 2. Docking flange; 3. Internal docking pipe; 301. Inner pipe cavity; 302. Docking pipe thread; 303. Sealing wedge ring; 304. Connecting pipe orifice; 4. Positioning arc plate; 401. Arc plate flange; 402. Arc plate connection hole; 5. Movable plug; 501. Plug wedge edge; 502. Plug support; 503. Plug top spring; 6. Pressure detection gauge; 601. Pressure gauge spiral connecting pipe; 7. Pressure limiting valve; 701. Valve body spiral connecting pipe; 801. Arc plate connecting plate (8), connecting plate flange; 802. Connecting plate connection hole; 9. Alarm; 901. Alarm lamp; 902. Liquid control trigger valve. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0035] Embodiment 1: Please refer to Figures 1 to 10 :

[0036] The present invention provides a pipeline pressure gauge with a pressure alarm structure, including: a pressure gauge installation pipe 1, with a docking flange 2 welded to each end of the pressure gauge installation pipe 1. Four installation sockets 101 are provided on the wall of the pressure gauge installation pipe 1, and the axes of the installation sockets 101 are perpendicular to the axis of the pressure gauge installation pipe 1. Two inner docking pipes 3 are tightly inserted into the four installation sockets 101. By installing the inner docking pipes 3 through the installation sockets 101, the inner docking pipes 3 are fixedly connected inside the pressure gauge installation pipe 1. A positioning arc plate 4 is fixedly connected to the lower end of the inner docking pipe 3, and the upper surface of the positioning arc plate 4 fits against the outer surface of the pressure gauge installation pipe 1. An active plug 5 is slidably connected inside the inner docking pipe 3. A pressure detection gauge 6 and a pressure limiting valve 7 are respectively installed on the two inner docking pipes 3. Above the two positioning arc plates 4, an arc plate connecting plate 8 is installed by bolts, and two alarms 9 are fixedly connected to the arc plate connecting plate 8. Inside the lower part of the inner docking pipe 3, an inner pipe cavity 301 is provided, and inside the upper part of the inner docking pipe 3, a docking pipe thread 302 is machined. A sealing wedge ring 303 is provided at the lower edge of the docking pipe thread 302. Four square-hole-shaped communication nozzles 304 are provided on the wall of the inner docking pipe 3. The input end of the pressure detection gauge 6 is fixedly connected with a pressure gauge screw joint 601, and the pressure gauge screw joint 601 is screwed into the docking pipe thread 302 of the left inner docking pipe 3. The input end of the pressure limiting valve 7 is fixedly connected with a valve body screw joint 701, and the valve body screw joint 701 is screwed into the docking pipe thread 302 of the right inner docking pipe 3. The pipeline pressure gauge integrates the pressure gauge and the pipeline. During manufacturing, the pressure gauge installation pipe 1, the inner docking pipe 3, the positioning arc plate 4, the active plug 5, and the arc plate connecting plate 8 can be manufactured separately. After manufacturing, multiple single components can be assembled to complete the manufacturing of the pipeline pressure gauge. The manufacturing is convenient, the assembly is easy, and the installation is firm. By fixing the arc plate connecting plate 8 to the two positioning arc plates 4 with bolts, the two positioning arc plates 4 are fixedly attached to the outer surface of the pressure gauge installation pipe 1 and maintain a fixed fit, which can further improve the installation stability of the inner docking pipe 3 and the positioning arc plate 4, and prevent the inner docking pipe 3 from detaching from the pressure gauge installation pipe 1 under the action of external force or internal hydraulic pressure.

[0037] In the embodiment of the present disclosure, at the front edge and the rear edge of the positioning arc plate 4, an arc plate flange 401 is respectively bent and processed. An arc plate connection hole 402 with a circular hole structure is formed on the arc plate flange 401. The lower surface of the arc plate connection plate 8 is attached to the outer surface of the pressure gauge installation pipe 1. At the front edge and the rear edge of the arc plate connection plate 8, a connection plate flange 801 is respectively bent and processed. A connection plate connection hole 802 is formed on the connection plate flange 801. The inner docking pipe 3 is limited by the positioning arc plate 4, and the positioning arc plate 4 is fixedly connected to the arc plate connection plate 8 through bolts, maintaining the firm docking of the positioning arc plate 4 and the arc plate connection plate 8, so that the inner docking pipe 3 is fixedly installed inside the pressure gauge installation pipe 1, improving the installation firmness of the inner docking pipe 3, and avoiding the situation that the inner docking pipe 3 is separated from the pressure gauge installation pipe 1 due to the vibration of the internal liquid flow of the pipeline or the vibration outside the pipe body.

[0038] In the embodiment of the present disclosure, a plug block wedge edge 501 is processed at the upper surface edge of the movable plug block 5. The plug block wedge edge 501 is attached to the sealing wedge ring 303. The movable plug block 5 is slidably connected inside the inner pipe cavity 301. There are two plug block support columns 502 at the upper surface edge of the movable plug block 5. A cavity is formed at the bottom of the movable plug block 5. A plug block top spring 503 is fixedly connected to the inner surface of the cavity at the bottom of the movable plug block 5. The lower end of the plug block top spring 503 is fixedly connected to the upper surface of the positioning arc plate 4. Under normal conditions, the movable plug block 5 is pushed upward by the action of the plug block top spring 503, so that it is tightly pushed upward. When the pressure detection gauge 6 and the pressure limiting valve 7 are not installed, by the action of the plug block top spring 503, the movable plug block 5 is pushed and topped so that the plug block support column 502 thereof is attached to the sealing wedge ring 303, blocking the communication pipe orifice 304, so that the inside of the inner docking pipe 3 is not communicated with the inside of the pressure gauge installation pipe 1, and the pressure inside the pressure gauge installation pipe 1 will not affect the opening of the inner docking pipe 3, and the medium inside the pressure gauge installation pipe 1 will not leak through the opening of the inner docking pipe 3. When the pressure detection gauge 6 and the pressure limiting valve 7 are installed, as the pressure gauge screw connection pipe 601 or the valve body screw connection pipe 701 rotates and is inserted into the inside of the docking pipe thread 302, the movable plug block 5 is pushed downward, so that the movable plug block 5 moves below the communication pipe orifice 304, and the internal space of the inner docking pipe 3 is communicated with the internal space of the pressure gauge installation pipe 1 through the communication pipe orifice 304, so that the pressure detected by the pressure detection gauge 6 or the pressure limiting valve 7 is equal to the pressure inside the pressure gauge installation pipe 1, and the pressure detection gauge 6 and the pressure limiting valve 7 can operate normally to perform normal detection on the hydraulic pipeline.

[0039] Embodiment 2, on the basis of Embodiment 1, two warning lights 901 are installed on the alarm 9. The warning lights 901 are connected to the alarm 9 through electrical connection lines. The alarm 9 is connected to a liquid-controlled trigger valve 902 through an electrical connection line. The liquid-controlled trigger valve 902 is installed on the overflow pipe of the pressure-limiting valve 7; the set pressure of the pressure-limiting valve 7 is the highest set pressure of the hydraulic pipeline. When the pressure is higher than the highest set pressure of the pressure-limiting valve 7, the pressure-limiting valve automatically opens to control the pressure gauge and the internal pressure of the pipeline, avoiding damage to the pressure gauge or the pipeline due to excessive pressure. At the same time, an alarm mechanism is provided. When the pressure-limiting valve 7 is activated, the liquid-controlled trigger valve 902 connected to the discharge port of the pressure-limiting valve 7 is triggered by the discharged liquid, causing the alarm 9 to start and emit an alarm sound. At the same time, warning lights are emitted through the warning lights 901 to remind the maintenance personnel to adjust the pipeline pressure. It has a pressure alarm function, which is convenient for quickly carrying out pipeline maintenance.

[0040] Working principle of this embodiment: First, during the manufacture of the device, the pressure gauge installation pipe 1, the inner docking pipe 3, the positioning arc plate 4, the movable plug 5, and the arc plate connecting plate 8 are manufactured separately. Then, the inner docking pipe 3 is inserted into the installation socket 101 and the gap is filled by welding. The arc plate connecting plate 8 is fixedly connected to the two positioning arc plates 4 by bolts to improve the installation firmness of the inner docking pipe 3 on the pressure gauge installation pipe 1. The pressure detection gauge 6 and the pressure limiting valve 7 are respectively installed in the docking pipe threads 302 of the two inner docking pipes 3 by screw connection. The pipeline pressure gauge is installed in the pipeline through the docking flange 2. The set pressure of the pressure limiting valve 7 is the highest set pressure of the hydraulic pipeline. Under normal conditions, the pressure detection gauge 6 and the pressure limiting valve 7 are installed on the two inner docking pipes 3. The pressure gauge screw joint 601 is screwed to the docking pipe thread 302. The upper end of the plug post 502 fits against the lower end face of the docking pipe thread 302, and the movable plug 5 is pushed downward, compressing the plug top spring 503. The plug wedge edge 501 is separated from the sealing wedge ring 303, enabling the communication pipe orifice 304 to connect the inside and outside of the inner docking pipe 3, allowing the pressure detection gauge 6 to connect to the pressure gauge installation pipe 1 and detect the pressure inside the pressure gauge installation pipe 1. When it is necessary to repair, detect, or replace the pressure detection gauge 6 or the pressure limiting valve 7, the pressure detection gauge 6 is rotated and disassembled, causing the pressure gauge screw joint 601 to move upward. The movable plug 5 moves upward under the action of the plug top spring 503 to block the communication pipe orifice 304, disconnecting the inside of the inner docking pipe 3 from the inside of the pressure gauge installation pipe 1. When the pressure gauge screw joint 601 is withdrawn from the docking pipe thread 302, the pressure inside the pressure gauge installation pipe 1 will not leak, facilitating the quick installation and disassembly of the pressure detection gauge 6 and the pressure limiting valve 7. During the installation and disassembly process, there is no need to close the pipeline and no leakage will occur. When installing the pressure detection gauge 6 and the pressure limiting valve 7, as the pressure gauge screw joint 601 or the valve body screw joint 701 is rotated and inserted into the docking pipe thread 302, the movable plug 5 is pushed downward, causing the movable plug 5 to move below the communication pipe orifice 304, connecting the internal space of the inner docking pipe 3 and the internal space of the pressure gauge installation pipe 1 through the communication pipe orifice 304, making the pressure detected by the pressure detection gauge 6 or the pressure limiting valve 7 equal to the pressure inside the pressure gauge installation pipe 1. Thus, the pressure detection gauge 6 and the pressure limiting valve 7 can be normally connected to the hydraulic pipeline and monitor the hydraulic pipeline. When the pressure is higher than the highest set pressure of the pressure limiting valve 7, the pressure limiting valve automatically opens to control the pressure inside the pressure gauge and the pipeline, preventing excessive pressure from damaging the pressure gauge or the pipeline. At the same time, an alarm mechanism is provided. When the pressure limiting valve 7 is activated, the liquid-controlled trigger valve 902 connected to the discharge port of the pressure limiting valve 7 is triggered by the discharged liquid, causing the alarm 9 to start and emit an alarm sound. At the same time, an alarm light 901 emits an alarm light to remind the maintenance personnel to adjust the pipeline pressure, having a pressure alarm function.

[0041] In this article, the following points need attention:

[0042] 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.

[0043] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0044] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A pipeline pressure gauge with a pressure alarm structure, characterized in that: include: A pressure gauge installation tube (1), wherein two ends of the pressure gauge installation tube (1) are respectively welded with a butt flange (2), the pressure gauge installation tube (1) is provided with four installation sockets (101) on the tube wall, the axes of the installation sockets (101) are perpendicular to the axes of the pressure gauge installation tube (1), two inner butt tubes (3) are tightly plugged on the four installation sockets (101), the lower end of the inner butt tube (3) is fixedly connected with a positioning arc plate (4), the upper surface of the positioning arc plate (4) is in contact with the outer surface of the pressure gauge installation tube (1), the inner butt tube (3) is slidably connected with a movable block (5), a pressure detection gauge (6) and a pressure limiting valve (7) are respectively installed on the two inner butt tubes (3), arc plate connecting plates (8) are installed above the two positioning arc plates (4) by bolts, and two alarms (9) are fixedly connected to the arc plate connecting plates (8); An inner tube cavity (301) is provided at the lower part of the inner butt-joint tube (3), and a butt-joint tube thread (302) is processed at the upper part of the inner butt-joint tube (3); A sealing wedge ring (303) is provided at the lower end edge of the butt-joint pipe thread (302), and four connecting pipe openings (304) with square hole structures are provided on the pipe wall of the inner butt-joint pipe (3); a block wedge edge (501) is processed on the upper surface edge of the movable block (5), and the block wedge edge (501) is fitted with the sealing wedge ring (303); the movable block (5) is slidably connected inside the inner pipe cavity (301), and two block pillars (502) are provided on the upper surface edge of the movable block (5); A cavity is provided at the bottom of the movable block (5); a block top spring (503) is fixedly connected to the inner surface of the cavity at the bottom of the movable block (5); and the lower end of the block top spring (503) is fixedly connected to the upper surface of the positioning arc plate (4).

2. A pipeline pressure gauge with a pressure alarm structure according to claim 1, characterized in that: The front edge and the rear edge of the positioning arc plate (4) are respectively bent to form an arc plate fold edge (401), and an arc plate connection hole (402) with a circular hole structure is provided on the arc plate fold edge (401).

3. The pipeline pressure gauge with a pressure alarm structure according to claim 1, characterized in that: The input end of the pressure detection gauge (6) is fixedly connected to a pressure gauge screw pipe (601), and the pressure gauge screw pipe (601) is screwed into a butt-joint pipe thread (302) of the inner butt-joint pipe (3) located on the left side.

4. The pipeline pressure gauge with a pressure alarm structure according to claim 1, characterized in that: The input end of the pressure-limiting valve (7) is fixedly connected to a valve body spiral pipe (701), and the valve body spiral pipe (701) is spirally connected to a butt-joint pipe thread (302) located on the right inner butt-joint pipe (3).

5. The pipeline pressure gauge with a pressure alarm structure according to claim 1, characterized in that: The lower surface of the arc plate connecting plate (8) is in contact with the outer surface of the pressure gauge mounting tube (1), and the front edge and the rear edge of the arc plate connecting plate (8) are respectively bent to form connecting plate folding edges (801), and the connecting plate folding edges (801) are provided with connecting plate connecting holes (802).

6. The pipeline pressure gauge with a pressure alarm structure according to claim 1, characterized in that: The alarm (9) is installed with two alarm lights (901), the alarm lights (901) are connected to the alarm (9) via electrical connection lines, the alarm (9) is connected to a hydraulically controlled trigger valve (902) via electrical connection lines, and the hydraulically controlled trigger valve (902) is installed on the overflow pipe of the pressure limiting valve (7).

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