Pipeline pressure monitoring control device

Abstract

The application discloses a pipeline pressure monitoring control device, which is connected with a detected pipeline through a pipeline connecting structure. The pipeline monitoring device comprises a first pipe body, a second pipe body and a driven pipe body. A first pressure gauge is connected to the first pipe body, a second pressure gauge is connected to the second pipe body, and a third pressure gauge and a fourth pressure gauge are connected to the detected pipeline respectively. First, the control valve is closed, then the driving motor of the pipeline monitoring device between the two detected pipelines is operated, the values of the first pressure gauge and the second pressure gauge are input to the controller, the controller judges according to the values, if the controller itself does not leak, the control valve works normally, the pipeline monitoring device is closed, and whether the control valve leaks is judged through the third pressure gauge and the fourth pressure gauge. If the control valve leaks, the control valve is closed, and the pipeline monitoring device is opened, which plays a replacement role. Or if no leakage is found, the pipeline monitoring device can also be opened, which plays a shunting role.

Description

Technical Field

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

[0002] A pipeline is a device consisting of pipes, pipe fittings, and valves used to transport gases, liquids, or fluids containing solid particles, such as natural gas transportation pipelines. In the event of a natural gas leak, a large amount of carbon monoxide is produced, wasting energy and potentially causing poisoning. Currently, pipeline pressure monitoring typically involves installing pressure-holding valves with pressure gauges. However, if the pressure valve itself leaks, accurate monitoring and control become difficult. Therefore, developing a pipeline pressure monitoring and control device that overcomes these shortcomings is crucial. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, the present invention provides a pipeline pressure monitoring and control device, including a pipeline detection mechanism, wherein the pipeline detection mechanism is connected to the pipeline being detected through a pipeline connection structure;

[0004] The detection pipeline mechanism includes a first pipe body, a second pipe body, and a driven pipe body connecting the first pipe body and the second pipe body. The driven pipe body is a flat cylindrical shape and has a built-in first cavity. A crescent-shaped connecting post is integrally formed between the upper and lower surfaces of the first cavity. A driving cavity is formed between the concave surface of the crescent-shaped connecting post and the inner wall of the first cavity. A driving wheel is rotatably connected in the driving cavity. The driving wheel has first mating grooves evenly distributed on it. A first protrusion is formed between several first mating grooves. The mechanism also includes a driving motor. The output end of the driving motor is fixedly connected to the driving wheel.

[0005] The detection pipeline mechanism further includes a limiting component, which includes several limiting blocks connected to each other. The limiting blocks sequentially pass through the convex surface of the crescent-shaped connecting column and the inner wall of the first cavity. The end of the first protruding block abuts against the concave surface of the crescent-shaped connecting column at least when it moves to the middle of the crescent-shaped connecting column. The limiting block engages with the first mating groove, causing the limiting block to deform under pressure. It abuts against the inner wall of the first cavity and the outer wall of the first mating groove. At this time, the end of the first protruding block abuts against the concave surface of the crescent-shaped connecting column, and at this time, the surface of another limiting block abuts against the convex surface of the crescent-shaped connecting column and the inner wall of the first cavity, so that the first tube and the second tube are not connected.

[0006] The first tube is connected to a first pressure gauge, the second tube is connected to a second pressure gauge, and the device also includes a controller. The input end of the controller is connected to the first pressure gauge and the second pressure gauge, the output end of the controller is connected to a drive motor, and the output end of the controller is also electrically connected to an alarm.

[0007] The tested pipes are connected by control valves. A third pressure gauge and a fourth pressure gauge are respectively connected to the tested pipes located on both sides of the control valve. The tested pipes located on both sides of the control valve are respectively connected to the first pipe body and the second pipe body. The third pressure gauge and the fourth pressure gauge are electrically connected to the input terminal of the controller. The output terminal of the controller is electrically connected to the valve stem drive of the control valve.

[0008] Through the above technical solution, the first and second pressure gauges can detect whether there is any leakage in the detection pipeline mechanism of this invention. When put into use: first, the control valve is closed, then the drive motor of the detection pipeline mechanism between the two pipelines being detected works. The values ​​of the first and second pressure gauges are input to the controller. The controller judges based on the values. If there is no leakage, the control valve works normally and the detection pipeline mechanism is closed. The third and fourth pressure gauges are used to judge whether the control valve is leaking. If there is a leak, the control valve is closed and the detection pipeline mechanism is opened, which plays a substitute role. Alternatively, if no leakage is found, the detection pipeline mechanism can also be opened to divert the flow.

[0009] As a preferred embodiment, the limiting block includes a limiting body and an abutting protrusion disposed on the outer wall of the limiting body. The abutting protrusion includes a first protrusion, and a first limiting groove is formed on the limiting body. The first protrusion is fitted into the first limiting groove. The abutting protrusion also includes a second protrusion, and a second limiting groove is formed on the limiting body. The second protrusion is fitted into the second limiting groove. The first limiting groove and the second limiting groove are respectively disposed on opposite sides of the limiting body and abut against the inner wall of the first cavity and the outer wall of the first mating groove, respectively.

[0010] Preferably, the first protrusion is provided in a plurality of pieces, which are arranged intermittently or continuously, and the second protrusion is provided in a plurality of pieces, which are arranged continuously or intermittently; or the first protrusion and the second protrusion are connected end to end and integrally formed into a protruding ring surrounding the outer wall of the limiting body.

[0011] The first and / or second protrusions of the pipeline detection mechanism are hollow rubber elastic balls; or the first and second protrusions are connected end to end to form a hollow rubber ring.

[0012] The above technical solution increases the sealing performance by setting the first and second protrusions, ensuring that the amount of gas or liquid passing through the driven tube is constant.

[0013] As a preferred embodiment, the connector includes a connecting body and connecting balls integrally formed at both ends of the connecting body. The limiting block has a spherical groove that mates with the connecting ball. The connector is connected to the top or bottom of two adjacent limiting blocks.

[0014] With the above technical solution, the above arrangement does not obstruct the smooth flow of liquids or gases.

[0015] As a preferred embodiment, the connecting body includes several interconnected connecting sub-bodies, with adjacent connecting sub-bodies capable of relative axial movement and circumferential rotation; one of the connecting sub-bodies has a movable groove on its end face, and the end face of the adjacent connecting sub-bodies is integrally formed with a movable insert block inserted into the movable groove. The movable insert block includes an insertion post and an insertion limiting protrusion integrally formed with the insertion post within the movable groove. The connecting sub-bodies have a movable through hole communicating with the movable groove and used for inserting the insertion post. The diameter of the movable through hole is larger than the diameter of the insertion post, and the width of the movable groove is larger than the thickness of the limiting protrusion.

[0016] Preferably, a spring is fitted between the limiting protrusion and the movable groove.

[0017] Through the above technical solution, the connecting body can be of fixed length or variable length, in order to cooperate with the rotation of the first mating groove on the drive wheel and the sealing limit.

[0018] As a preferred embodiment, the first pipe body and the pipe to be tested are connected by a first pipe body connection structure. The first pipe body connection structure includes a first connecting pipe body integrally formed on the pipe to be tested. A plurality of first elastic arms are integrally formed on the inner wall of the first connecting pipe body. A plurality of elastic arms are spaced apart by a first interval. A second elastic arm is integrally formed on the inner wall of the connecting pipe body located at the first interval. A first extension tube extends outward from the end face of the first pipe body. After the first extension tube is inserted into the connecting pipe body, the first elastic arms and the second elastic arms deform and abut against the outer wall of the first extension tube. A first sealing ring is fixed on the end face of the first pipe body. After the first pipe body and the pipe to be tested are inserted, they are fixed by a clamp.

[0019] As a preferred embodiment, the second pipe body and the pipe being tested are connected by a second pipe body connection structure. The second pipe body connection structure includes a second connecting pipe body integrally formed on the pipe being tested. A plurality of third elastic arms are integrally formed on the inner wall of the second connecting pipe body, and a second interval is provided between the plurality of elastic arms. A fourth elastic arm is integrally formed on the inner wall of the connecting pipe body located at the second interval. A second extension tube extends outward from the end face of the second pipe body. After the second extension tube is inserted into the connecting pipe body, the third elastic arms and the fourth elastic arms deform and abut against the outer wall of the second extension tube. A second sealing ring is fixed on the end face of the first pipe body. After the second pipe body and the pipe being tested are inserted, they are fixed by clamps.

[0020] The second elastic arm bends inward at both ends to form a first locking foot. After the first tube body is inserted into the first connecting tube body, it causes the first elastic arm to deform, so that two adjacent first elastic arms are locked into the first locking foot; or the fourth elastic arm bends inward at both ends to form a second locking foot. After the second tube body is inserted into the second connecting tube body, it causes the third elastic arm to deform, so that two adjacent third elastic arms are locked into the second locking foot.

[0021] Through the above technical solution, the setting of the first tube connection structure and the second tube connection structure can increase the connection sealing of the present invention and prevent the influence of the values.

[0022] Compared with the prior art, the advantages of the present invention are as follows: The present invention has a simple structure. The first and second pressure gauges can detect whether there is any leakage in the detection pipeline mechanism of the present invention. When put into use: First, the control valve is closed. Then, the drive motor of the detection pipeline mechanism between the two pipelines being detected works. The values ​​of the first and second pressure gauges are input to the controller. The controller judges based on the values. If there is no leakage, the control valve works normally and the detection pipeline mechanism is closed. The third and fourth pressure gauges are used to judge whether the control valve is leaking. If there is a leak, the control valve is closed and the detection pipeline mechanism is opened, which plays a substitute role. Alternatively, if no leakage is found, the detection pipeline mechanism can also be opened to divert the flow. Attached Figure Description

[0023] Figure 1 This is a three-dimensional cross-sectional view of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the cross-section of the limiting block at point AA;

[0025] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 4This is a schematic diagram of the connection structure between the pipeline monitoring mechanism and the pipeline being monitored according to the present invention;

[0027] Figure 5 This is a schematic diagram of the cross-section of the connector.

[0028] Figure label:

[0029] 1-The pipe to be inspected; 2-First pipe body; 3-Second pipe body; 4-Driven pipe body; 5-First cavity; 6-Crescent-shaped connecting column; 7-Drive wheel; 8-First mating groove; 9-First protrusion; 10-Limiting block; 11-Limiting body; 13-First protrusion; 14-Second protrusion;

[0030] 15-Connector; 16-Connector body; 17-Connector ball; 18-Connector sub-body; 19-Modible groove; 20-Modible insert; 21-Control valve;

[0031] 22-First pressure gauge; 23-Second pressure gauge; 24-Third pressure gauge; 25-Fourth pressure gauge; 26-First connecting tube body; 27-First elastic arm; 28-Second elastic arm; 29-First locking foot; 30-First extension tube; 31-Second connecting tube body; 32-Second extension tube. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention and to more clearly define the scope of protection claimed by the present invention, the present invention will be described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present invention, and are merely a part of the embodiments of the present invention. The specific and direct descriptions of related structures are only for the convenience of understanding the present invention, and the specific features do not necessarily or directly limit the scope of the present invention.

[0033] Referring to the accompanying drawings, the present invention adopts the following technical solution: a pipeline pressure monitoring and control device, including a pipeline detection mechanism, wherein the pipeline detection mechanism is connected to the pipeline to be detected 1 through a pipeline connection structure;

[0034] The detection pipeline mechanism includes a first pipe body 2, a second pipe body 3, and a driven pipe body 4 connecting the first pipe body 2 and the second pipe body 3. The driven pipe body 4 is a flat cylindrical shape and has a built-in first cavity 5. A crescent-shaped connecting post 6 is integrally formed between the upper and lower surfaces of the first cavity 5. A driving cavity is formed between the concave surface of the crescent-shaped connecting post 6 and the inner wall of the first cavity 5. A driving wheel 7 is rotatably connected in the driving cavity. The driving wheel is evenly provided with first mating grooves 8. A first protrusion 9 is formed between several first mating grooves 8. The mechanism also includes a driving motor. The output end of the driving motor is fixedly connected to the driving wheel 7.

[0035] The detection pipeline mechanism also includes a limiting component, which includes a plurality of limiting blocks 10. Connectors 15 are connected between the limiting blocks 10. The limiting blocks 10 sequentially pass between the convex surface of the crescent-shaped connecting post 6 and the inner wall of the first cavity 5. At least when the end of the first protruding block 9 moves to the middle of the crescent-shaped connecting post 6, it abuts against the concave surface of the crescent-shaped connecting post 6. The limiting block 10 engages with the first mating groove 8, causing the limiting block 10 to deform under pressure. It abuts against the inner wall of the first cavity 5 and the outer wall of the first mating groove 8. At this time, the end of the first protruding block 9 abuts against the concave surface of the crescent-shaped connecting post 6, and the surface of another limiting block 10 abuts against the convex surface of the crescent-shaped connecting post 6 and the inner wall of the first cavity, so that the first tube 2 and the second tube 3 are not connected.

[0036] The first tube body 2 is connected to a first pressure gauge 22, the second tube body 3 is connected to a second pressure gauge 23, and a controller is also included. The input end of the controller is connected to the first pressure gauge 22 and the second pressure gauge 23, the output end of the controller is connected to a drive motor, and the output end of the controller is also electrically connected to an alarm.

[0037] Several of the tested pipes 1 are connected by control valves 21. A third pressure gauge 24 and a fourth pressure gauge 25 are respectively connected to the tested pipes 1 located on both sides of the control valve 21. The tested pipes 1 located on both sides of the control valve 21 are respectively connected to the first pipe body 2 and the second pipe body 3. The third pressure gauge 24 and the fourth pressure gauge 25 are electrically connected to the input terminal of the controller. The output terminal of the controller is electrically connected to the valve stem drive of the control valve 21.

[0038] Through the above technical solution, the first pressure gauge 22 and the second pressure gauge 23 can detect whether there is any leakage in the detection pipeline mechanism of the present invention. When put into use: first, the control valve 21 is closed, then the drive motor of the detection pipeline mechanism between the two detected pipelines 1 works, the value of the first pressure gauge 22 and the value of the second pressure gauge 23 are input to the controller, the controller judges according to the value, if there is no leakage, the control valve 21 works normally, the detection pipeline mechanism is closed, and the third pressure gauge 24 and the fourth pressure gauge 25 judge whether the control valve 21 is leaking. If there is leakage, the control valve 21 is closed and the detection pipeline mechanism is opened, which plays a substitute role; or if no leakage is found, the detection pipeline mechanism can also be opened to play a diversion role.

[0039] As a preferred embodiment, the limiting block 10 includes a limiting body 11 and an abutting protrusion disposed on the outer wall of the limiting body 11. The abutting protrusion includes a first protrusion 13. A first limiting groove is formed on the limiting body 11, and the first protrusion 13 is fitted into the first limiting groove. The abutting protrusion also includes a second protrusion 14. A second limiting groove is formed on the limiting body 11, and the second protrusion 14 is fitted into the second limiting groove. The first limiting groove and the second limiting groove are respectively disposed on opposite sides of the limiting body 11 and abut against the inner wall of the first cavity 5 and the outer wall of the first mating groove 8, respectively.

[0040] Preferably, the first protrusion 13 is provided in a plurality of pieces, which are arranged intermittently or continuously, and the second protrusion 14 is provided in a plurality of pieces, which are arranged continuously or intermittently; or the first protrusion 13 and the second protrusion 14 are connected end to end and integrally formed into a protruding ring surrounding the outer wall of the limiting body 11.

[0041] The first protrusion 13 and / or the second protrusion 14 of the pipeline detection mechanism are hollow rubber elastic balls; or the first protrusion 13 and the second protrusion 14 are connected end to end to form a hollow rubber ring.

[0042] Through the above technical solution, the arrangement of the first protrusion 13 and the second protrusion 14 can increase the sealing performance, so that the amount of gas or liquid passing through the driven tube 4 at one time is constant.

[0043] As a preferred embodiment, the connector 15 includes a connecting body 16 and a connecting ball 17 integrally formed at both ends of the connecting body 16. The limiting block 10 has a spherical groove that mates with the connecting ball 17. The connector 15 is connected to the top or bottom of two adjacent limiting blocks 10.

[0044] With the above technical solution, the above arrangement does not obstruct the smooth flow of liquids or gases.

[0045] As a preferred embodiment, the connecting body 16 includes a plurality of interconnected connecting sub-bodies 18, which can move axially and rotate circumferentially relative to each other. One of the connecting sub-bodies 18 has a movable groove 19 on its end face, and the end face of the other connecting sub-bodies 18 adjacent to it is integrally formed with a movable insert 20 inserted into the movable groove 19. The movable insert 20 includes an insert post and an insertion limiting protrusion integrally formed with the insert post in the movable groove 19. The connecting sub-bodies 18 have a movable through hole that communicates with the movable groove 19 and is used for inserting the insert post. The diameter of the movable through hole is larger than the diameter of the insert post, and the width of the movable groove 19 is larger than the thickness of the limiting protrusion.

[0046] Preferably, a spring is fitted between the limiting protrusion and the movable groove 19.

[0047] Through the above technical solution, the connecting body 16 can be of fixed length or variable length, in order to cooperate with the rotation of the first mating groove 8 on the drive wheel 7 and the sealing limit.

[0048] As a preferred embodiment, the first pipe body and the pipe to be tested are connected by a first pipe body connection structure. The first pipe body connection structure includes a first connecting pipe body 26 integrally formed on the pipe to be tested. A plurality of first elastic arms 27 are integrally formed on the inner wall of the first connecting pipe body 26. A first interval is provided between the plurality of elastic arms. A second elastic arm 28 is integrally formed on the inner wall of the connecting pipe body located at the first interval. A first extension tube 30 extends outward from the end face of the first pipe body 2. After the first extension tube 30 is inserted into the connecting pipe body, the first elastic arms 27 and the second elastic arms 28 deform and abut against the outer wall of the first extension tube 30. A first sealing ring is fixed on the end face of the first pipe body 2. The first pipe body and the pipe to be tested are fixed by clamps after being inserted.

[0049] As a preferred embodiment, the second pipe body and the pipe being tested are connected by a second pipe body connection structure. The second pipe body connection structure includes a second connecting pipe body 31 integrally formed on the pipe being tested. A plurality of third elastic arms are integrally formed on the inner wall of the second connecting pipe body 31, and a second interval is provided between the plurality of elastic arms. A fourth elastic arm is integrally formed on the inner wall of the connecting pipe body located at the second interval. A second extension pipe 32 extends outward from the end face of the second pipe body 3. After the second extension pipe 32 is inserted into the connecting pipe body, the third elastic arms and the fourth elastic arms deform and abut against the outer wall of the second extension pipe 32. A second sealing ring is fixed on the end face of the first pipe body 2. After the second pipe body and the pipe being tested are inserted, they are fixed by clamps.

[0050] After the two ends of the second elastic arm 28 are bent inward to form the first locking foot 29, the first tube body is inserted into the first connecting tube body 26, causing the first elastic arm 27 to deform, so that two adjacent first elastic arms 27 are locked into the first locking foot; or after the two ends of the fourth elastic arm are bent inward to form the second locking foot, the second tube body is inserted into the second connecting tube body 31, causing the third elastic arm to deform, so that two adjacent third elastic arms are locked into the second locking foot.

[0051] Through the above technical solution, the setting of the first tube connection structure and the second tube connection structure can increase the connection sealing of the present invention and prevent the influence of the values.

[0052] Compared with the prior art, the advantages of the present invention are as follows: The present invention has a simple structure. The first pressure gauge 22 and the second pressure gauge 23 can detect whether there is any leakage in the detection pipeline mechanism of the present invention. When put into use: first, the control valve 21 is closed, and then the drive motor of the detection pipeline mechanism between the two detected pipelines 1 works. The values ​​of the first pressure gauge 22 and the second pressure gauge 23 are input to the controller. The controller judges according to the values. If there is no leakage, the control valve 21 works normally and the detection pipeline mechanism is closed. The third pressure gauge 24 and the fourth pressure gauge 25 determine whether the control valve 21 is leaking. If there is leakage, the control valve 21 is closed and the detection pipeline mechanism is opened, which plays a substitute role. Alternatively, if no leakage is found, the detection pipeline mechanism can also be opened to divert the flow.

[0053] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0054] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A pipeline pressure monitoring and control device, characterized in that: It includes a pipeline detection mechanism, which is connected to the pipeline (1) being detected via a pipeline connection structure; The detection pipeline mechanism includes a first pipe body (2), a second pipe body (3), and a driven pipe body (4) connecting the first pipe body (2) and the second pipe body (3). The driven pipe body (4) is a flat cylindrical shape and has a built-in first cavity (5). A crescent-shaped connecting column (6) is integrally formed between the upper and lower surfaces of the first cavity (5). A driving cavity is formed between the concave surface of the crescent-shaped connecting column (6) and the inner wall of the first cavity (5). A driving wheel (7) is rotatably connected in the driving cavity. A first mating groove (8) is evenly opened on the driving wheel. A first protrusion (9) is formed between several first mating grooves (8). The mechanism also includes a driving motor. The output end of the driving motor is fixedly connected to the driving wheel (7). The detection pipeline mechanism also includes a limiting component, which includes several limiting blocks (10), and connecting members (15) are connected between the several limiting blocks (10). The several limiting blocks (10) pass sequentially through the convex surface of the crescent-shaped connecting column (6) and the inner wall of the first cavity (5). The end of the first protruding block (9) abuts against the concave surface of the crescent-shaped connecting column (6) at least when it moves to the middle of the crescent-shaped connecting column (6). The limiting block (10) is engaged into the first mating groove (8) so that the limiting block (10) is deformed by compression. It abuts against the inner wall of the first cavity (5) and the outer wall of the first mating groove (8). At this time, the end of the first protruding block (9) abuts against the concave surface of the crescent-shaped connecting column (6), and at this time, the surface of another limiting block (10) abuts against the convex surface of the crescent-shaped connecting column (6) and the inner wall of the first cavity so that the first tube body (2) and the second tube body (3) are not connected to each other. The first tube (2) is connected to a first pressure gauge (22), the second tube (3) is connected to a second pressure gauge (23), and a controller is also included. The input end of the controller is connected to the first pressure gauge (22) and the second pressure gauge (23), the output end of the controller is connected to a drive motor, and the output end of the controller is also electrically connected to an alarm. Several of the tested pipes (1) are connected by control valves (21). A third pressure gauge (24) and a fourth pressure gauge (25) are respectively connected to the tested pipes (1) located on both sides of the control valve (21). The tested pipes (1) located on both sides of the control valve (21) are respectively connected to the first pipe body (2) and the second pipe body (3). The third pressure gauge (24) and the fourth pressure gauge (25) are electrically connected to the input terminal of the controller. The output terminal of the controller is electrically connected to the valve stem drive of the control valve (21). The limiting block (10) includes a limiting body (11) and an abutting protrusion disposed on the outer wall of the limiting body (11). The abutting protrusion includes a first protrusion (13). A first limiting groove is formed on the limiting body (11). The first protrusion (13) is fitted and installed in the first limiting groove. The abutting protrusion includes a second protrusion (14). A second limiting groove is formed on the limiting body (11). The second protrusion (14) is fitted and installed in the second limiting groove. The first limiting groove and the second limiting groove are respectively disposed on opposite sides of the limiting body (11) and abut against the inner wall of the first cavity (5) and the outer wall of the first mating groove (8) respectively.

2. The pipeline pressure monitoring and control device according to claim 1, characterized in that: The first protrusion (13) is provided in several pieces, either intermittently or continuously, and the second protrusion (14) is provided in several pieces, either continuously or intermittently; or the first protrusion (13) and the second protrusion (14) are connected end to end and integrally formed into a protruding ring surrounding the outer wall of the limiting body (11).

3. The pipeline pressure monitoring and control device according to claim 1 or 2, characterized in that: The first protrusion (13) and / or the second protrusion (14) are hollow rubber elastic balls; or the first protrusion (13) and the second protrusion (14) are connected end to end to form a hollow rubber ring.

4. The pipeline pressure monitoring and control device according to claim 1, characterized in that: The connector (15) includes a connecting body (16) and a connecting ball (17) integrally formed at both ends of the connecting body (16). The limiting block (10) has a spherical groove that cooperates with the connecting ball (17). The connector (15) is connected to the top or bottom of two adjacent limiting blocks (10).

5. The pipeline pressure monitoring and control device according to claim 4, characterized in that: The connecting body (16) includes several interconnected connecting sub-bodies (18), which can move axially and rotate circumferentially relative to each other. One of the connecting sub-bodies (18) has a movable groove (19) on its end face, and the other connecting sub-bodies (18) adjacent to it has a movable insert (20) integrally formed on its end face, which is inserted into the movable groove (19). The movable insert (20) includes an insertion post and an insertion limiting protrusion integrally formed with the insertion post in the movable groove (19). The connecting sub-bodies (18) have a movable through hole that communicates with the movable groove (19) and is used for inserting the insertion post. The diameter of the movable through hole is larger than the diameter of the insertion post, and the width of the movable groove (19) is larger than the thickness of the limiting protrusion.

6. The pipeline pressure monitoring and control device according to claim 5, characterized in that: A spring is fitted between the limiting protrusion and the movable groove (19).

7. The pipeline pressure monitoring and control device according to claim 1, characterized in that: The first pipe body and the pipe to be tested are connected by a first pipe body connection structure. The first pipe body connection structure includes a first connecting pipe body (26) integrally formed on the pipe to be tested. A plurality of first elastic arms (27) are integrally formed on the inner wall of the first connecting pipe body (26). There is a first interval between the plurality of elastic arms. A second elastic arm (28) is integrally formed on the inner wall of the connecting pipe body located at the first interval. A first extension tube (30) extends outward from the end face of the first pipe body (2). After the first extension tube (30) is inserted into the connecting pipe body, the first elastic arms (27) and the second elastic arms (28) deform and abut against the outer wall of the first extension tube (30). A first sealing ring is fixed on the end face of the first pipe body (2). The first pipe body and the pipe to be tested are fixed by clamps after being inserted.

8. The pipeline pressure monitoring and control device according to claim 1, characterized in that: The second pipe body and the pipe to be tested are connected by a second pipe body connection structure. The second pipe body connection structure includes a second connecting pipe body (31) integrally formed on the pipe to be tested. A plurality of third elastic arms are integrally formed on the inner wall of the second connecting pipe body (31). There is a second interval between the plurality of elastic arms. A fourth elastic arm is integrally formed on the inner wall of the connecting pipe body located at the second interval. A second extension pipe (32) extends outward from the end face of the second pipe body (3). After the second extension pipe (32) is inserted into the connecting pipe body, the third elastic arms and the fourth elastic arms deform and abut against the outer wall of the second extension pipe (32). A second sealing ring is fixed on the end face of the first pipe body (2). The second pipe body and the pipe to be tested are fixed by clamps after being inserted.

9. The pipeline pressure monitoring and control device according to claim 7 or 8, characterized in that: The second elastic arm (28) is bent inward at both ends to form the first locking foot (29). After the first tube body is inserted into the first connecting tube body (26), the first elastic arm (27) is deformed, so that two adjacent first elastic arms (27) are locked into the first locking foot. Alternatively, the two ends of the fourth elastic arm are bent inward to form the second locking foot. After the second tube body is inserted into the second connecting tube body (31), the third elastic arm is deformed, so that the two adjacent third elastic arms are locked into the second locking foot.

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