Pressure pipeline air tightness detection device

Abstract

The utility model discloses a pressure pipeline air tightness detection device, which belongs to the technical field of pipeline air tightness detection devices and comprises a supporting rack, a pressurization driving mechanism, an air expansion plugging structure, a limiting support, a locking mechanism, a detection clamp and a sensor actuating mechanism. The pressurization driving mechanism is arranged on one side face of the supporting rack, the air expansion plugging structure is arranged on the supporting rack, and the pressurization driving mechanism is in driving connection with the air expansion plugging structure; the limiting support and the locking mechanism are arranged adjacently, and the limiting support is arranged between the detection clamp and the air expansion plugging structure. The detection clamp is arranged on the other side of the supporting rack relative to the pressurization driving mechanism, and the sensor action mechanism is arranged adjacent to the detection clamp and movably connected with the detection clamp. The air tightness detection device for the pressure pipeline solves the technical problem of how to carry out air tightness detection on a single-section gas pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipeline gas tightness detection device, particularly to a kind of pressure pipeline gas tightness detection device applied to building gas pipeline construction field. BACKGROUND

[0002] Building gas pipeline is the pipeline network connecting external gas supply system and building internal gas facility, which is an important component of urban gas pipeline system; usually, it passes through different levels of pipeline structure, such as introduction pipe, vertical pipe, horizontal main pipe, etc., to introduce gas from municipal main pipeline into building interior, and distribute to specific gas points according to design requirements.

[0003] Gas, such as natural gas, liquefied petroleum gas, etc., has flammable and explosive characteristics, and pipeline gas tightness deficiency can cause leakage, leading to poisoning, fire or explosion accidents. Therefore, gas tightness detection is a mandatory step before putting into use after gas pipeline construction is completed, for example, indoor pipeline needs to complete test after backfilling, and detection data needs to meet standards such as "Petroleum and Chemical Metal Pipeline Engineering Construction Quality Acceptance Specification".

[0004] Based on this, the Chinese patent file with publication number CN221527905U discloses a gas pipeline gas tightness detection device, which includes a water tank, a top plate vertically lifting above the water tank, two moving seats moving in opposite directions arranged side by side on the top plate, an axis horizontally arranged rotating disc rotatingly arranged on each moving seat, a support hole arranged at the center of the rotating disc, and a sealing cover slidingly arranged on each rotating disc along its axial direction. This kind of gas pipeline gas tightness detection device solves the problem of inaccurate test results caused by slow change of pressure gauge value when the damage of gas pipeline is small, by ventilating one end of the pipeline and installing pressure gauge at the other end to detect the gas tightness of the pipeline in the traditional technology.

[0005] In addition, another Chinese patent file with publication number CN222047438U also discloses a gas pipeline interface gas tightness detection device, which includes a U-shaped base, a clamping assembly arranged inside the U-shaped base, a clamping plate, a sliding groove arranged on one side of the outer surface of the clamping plate, a rack welded to the lower outer surface of the clamping plate, a gear meshing with the outer surface of the rack, a worm gear fixedly installed on the lower outer edge of the gear, a worm meshing with the outer surface of the worm gear, and a motor fixedly installed on one end of the outer surface of the worm. By setting the clamping assembly, starting the motor to drive the worm to rotate, the worm drives the worm gear to rotate, thereby driving the gear to rotate synchronously, at this time, the two racks meshing with the outer surface of the gear move horizontally, the horizontal movement of the rack brings the two clamping plates closer to each other, thereby completing the clamping action. By using the above structure, the technician is prevented from directly contacting the gas leakage, thereby ensuring the health of the technician.

[0006] However, the prior art also has the technical problem that single-section gas pipelines cannot be detected for gas tightness. Specifically, when the construction of a building gas pipeline is completed, even if the existing gas pipeline gas tightness detection device is used to obtain a test qualified condition, it can basically be determined that the pipeline construction meets the design standard; However, there may be a situation where the gas tightness detection cannot pass. At this time, it is necessary to check the gas tightness of the pipeline system one by one. For example, the patent document with the announcement number CN222047438U discloses a technical scheme of a gas pipeline interface gas tightness detection device; However, this technical scheme cannot determine the gas tightness of a single-section pipeline. More specifically, according to the GB51455-2023 standard, the gas pipeline tightness test pressure needs to be determined according to the design pressure. For example, when the design pressure is greater than or equal to 5kPa, the test pressure is 1.15 times the design pressure and is not less than 0.1MPa. If the gas tightness of a single-section gas pipeline cannot be determined during the construction of a gas pipeline, especially if the gas tightness of a pressure pipeline does not meet the design requirements, the pipeline system that leaks cannot be optimized, and thus the subsequent gas tightness defects of the gas pipeline system cannot be completely avoided. Practical new type content

[0007] Therefore, it is necessary to provide a pressure pipeline gas tightness detection device for solving the technical problem of how to detect the gas tightness of a single-section gas pipeline.

[0008] A pressure pipeline gas tightness detection device comprises a support rack, a pressure boosting driving mechanism, a gas expansion plugging structure, a limiting support, a locking mechanism, a detection clamp and a sensor action mechanism; one side of the support rack is provided with the pressure boosting driving mechanism, the gas expansion plugging structure is arranged on the support rack, and the pressure boosting driving mechanism is drivingly connected with the gas expansion plugging structure; the limiting support and the locking mechanism are arranged adjacent to each other, and the limiting support is arranged between the detection clamp and the gas expansion plugging structure; the detection clamp is arranged on the other side of the support rack relative to the pressure boosting driving mechanism, the sensor action mechanism is arranged adjacent to the detection clamp, and the sensor action mechanism is movably connected with the detection clamp.

[0009] Further, the pressure boosting driving mechanism has a pressure boosting support frame, a pressure boosting driving cylinder, a pressure boosting piston telescopic rod and a pressure boosting stable connecting frame.

[0010] Further, the pressure boosting support frame is arranged on one end side of the support rack, the pressure boosting driving cylinder is connected with the pressure boosting support frame, and the pressure boosting driving cylinder is drivingly connected with the pressure boosting piston telescopic rod; the pressure boosting stable connecting frame is movably arranged on the side surface of the pressure boosting support frame, and the pressure boosting piston telescopic rod is drivingly connected with the pressure boosting stable connecting frame.

[0011] Further, the air inflation sealing structure has an internal inflation action cylinder, an internal inflation piston rod, an internal inflation container end, an internal inflation moving part, a gas guide end cover, an internal inflation sealing ring, and a gas guide channel.

[0012] Further, the internal inflation action cylinder is connected to the side of the supercharging stabilizing connecting frame, the internal inflation piston rod is movably arranged in the internal inflation action cylinder, and the internal inflation action cylinder is drivingly connected with the internal inflation piston rod; the internal inflation container end is arranged on the side of the internal inflation action cylinder, the internal inflation moving part is movably arranged in the internal inflation container end, the internal inflation piston rod is drivingly connected with the internal inflation moving part; the gas guide end cover is arranged on the side of the internal inflation container end, the internal inflation sealing ring is arranged between the gas guide end cover and the internal inflation container end, the internal inflation moving part is movably connected with the internal inflation sealing ring; and the gas guide channel is respectively connected with the internal inflation container end and the gas guide end cover.

[0013] Further, the locking mechanism has a locking base, a locking action cylinder, a locking telescopic piston rod, a swing connecting rod, and a locking limiting block.

[0014] Further, the locking base is arranged on the supporting rack, the locking action cylinder is movably arranged on the locking base, and the locking action cylinder is drivingly connected with the locking telescopic piston rod; the middle part of the swing connecting rod is movably arranged on the limiting support, one end of the swing connecting rod is connected with the locking telescopic piston rod, the other end of the swing connecting rod is connected with the locking limiting block, and the locking limiting block is movably arranged on the limiting support.

[0015] Further, the detection clamp has a clamp support, a clamp main body, a clamp limiting block, a clamp sealing ring, and a clamp detection gas channel.

[0016] Further, the clamp support is arranged on the supporting rack, the clamp main body is arranged on the clamp support, a plurality of the clamp limiting blocks are evenly distributed and arranged on the side of the clamp main body, the clamp sealing ring is arranged between the plurality of the clamp limiting blocks on the side of the clamp main body, and the clamp detection gas channel is arranged in the clamp main body.

[0017] Further, the sensor action mechanism has a sensor support, a sensor action cylinder, a sensor telescopic piston rod, and a measurement sensor; the sensor support is arranged on the supporting rack adjacent to the clamp support, the sensor action cylinder is arranged on the sensor support, the sensor action cylinder is drivingly connected with the sensor telescopic piston rod, the measurement sensor is connected to one end of the sensor telescopic piston rod, and the measurement sensor is movably connected with the clamp detection gas channel.

[0018] In summary, the pressure pipeline airtightness testing device of this utility model includes a support frame, a pressurization drive mechanism, an air expansion sealing structure, a limiting bracket, a locking mechanism, a testing fixture, and a sensor actuation mechanism. The pressurization drive mechanism is disposed on one side of the support frame, and the air expansion sealing structure is disposed on the support frame, with the pressurization drive mechanism and the air expansion sealing structure being drivenly connected. The limiting bracket is disposed adjacent to the locking mechanism and between the testing fixture and the air expansion sealing structure. The testing fixture is disposed on the other side of the support frame relative to the pressurization drive mechanism, and the sensor actuation mechanism is disposed adjacent to the testing fixture, with the sensor actuation mechanism being movably connected to the testing fixture. This utility model discloses a pressure pipeline airtightness testing device. It utilizes a pressurization drive mechanism to press one end of the gas pipe under test against the side of the testing fixture, while the other end of the gas pipe is sealed internally by an air-expansion sealing structure. After further air is introduced into the gas pipe using the air-expansion sealing structure, and provided there is no gas leakage in the testing fixture, the airtightness of the gas pipeline under high pressure can be verified using the sensor action mechanism based on the principle of differential pressure airtightness testing. Therefore, this utility model solves the technical problem of how to perform airtightness testing on a single section of gas pipeline. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a pressure pipeline airtightness testing device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a pressure pipeline airtightness testing device of this utility model from another direction;

[0021] Figure 3 This is a cross-sectional structural diagram of another part of the pressure pipeline airtightness testing device of this utility model.

[0022] Figure 4 This is an exploded structural diagram of another part of the pressure pipeline airtightness testing device of this utility model;

[0023] Figure 5 This is a cross-sectional structural diagram of a pressure pipeline airtightness testing device according to the present invention from another direction. Detailed Implementation

[0024] In order to make the above object, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners without departing from the spirit of the present application. Those skilled in the art will appreciate the scope of the present application and can make similar modifications without departing from the spirit of the present application. Therefore, the present application is not limited by the embodiments disclosed below.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0027] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be the first and second features directly contact, or the first and second features indirectly contact through intermediate media. Moreover, the first feature is "on", "above" and "on" the second feature can be the first feature is directly above or obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under", "below" and "under" the second feature can be the first feature is directly below or obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and are not the only embodiment.

[0030] Please see Figures 1 to 5 The utility model discloses a pressure pipeline gas tightness detection device includes: support rack 1, pressure drive mechanism 2, gas inflation plugging structure 3, spacing support 4, locking mechanism 5, detection clamp 6 and sensor action mechanism 7, one side of support rack 1 is provided with pressure drive mechanism 2, gas inflation plugging structure 3 is arranged on support rack 1, pressure drive mechanism 2 is driven to be connected with gas inflation plugging structure 3, spacing support 4 is provided with locking mechanism 5, spacing support 4 is arranged between detection clamp 6 and gas inflation plugging structure 3, detection clamp 6 is arranged on the other side of support rack 1 relative to pressure drive mechanism 2, sensor action mechanism 7 is provided with detection clamp 6, and sensor action mechanism 7 is movably connected with detection clamp 6.

[0031] Specifically, when the pressure pipeline airtightness testing device of this utility model is in operation, the operator can place the single section of gas pipeline to be tested on the limiting bracket 4, and make one end of the gas pipeline abut against the side of the testing clamp 6. At this time, the other end of the gas pipeline is placed on the adjacent side of the gas expansion sealing structure 3. Then, the locking mechanism 5 starts to operate, clamping the gas pipeline on the limiting bracket 4 in an upper and lower limiting posture. Next, the pressurizing drive mechanism 2 drives the gas expansion sealing structure 3 forward, so that the gas expansion sealing structure 3 extends into the inner cavity of the gas pipeline to be tested. Then, the pressurizing drive mechanism 2 pushes the end face of the gas pipeline to be tested until the other end of the gas pipeline to be tested is tightly attached to the testing clamp 6. On the side, the detection clamp 6 presses and seals the gas pipe at this end; then, the gas expansion sealing structure 3 expands under the drive of an external gas source until it expands and seals one end of the gas pipe; thus, both ends of the gas pipe to be tested are sealed; thereafter, the sensor action mechanism 7 starts to move until it abuts the side of the detection clamp 6, and this side is connected to the inner cavity of the gas pipe to be tested through the inner cavity of the detection clamp 6; thus, when high-pressure gas is filled into the inner cavity of the gas pipe to be tested through the gas expansion sealing structure 3, the sensor action mechanism 7 can detect whether there is a gas leak in the gas pipe under high pressure, for example, under a test pressure of 1.15 times the design pressure and not less than 0.1 MPa, on the side of the detection clamp 6. This utility model discloses a pressure pipeline airtightness testing device. The device utilizes a pressurizing drive mechanism 2 to press one end of the gas pipe under test against the side of the testing clamp 6, while the other end of the gas pipe is sealed internally by the air-expansion sealing structure 3. After air is continuously injected into the gas pipe under test using the air-expansion sealing structure 3, and provided there is no gas leakage in the testing clamp 6, the airtightness of the gas pipeline under high pressure can be verified using the sensor action mechanism 7, based on the principle of differential pressure airtightness testing. Therefore, this utility model's pressure pipeline airtightness testing device solves the technical problem of how to perform airtightness testing on a single section of gas pipeline.

[0032] Furthermore, the boosting drive mechanism 2 includes a boosting support frame 201, a boosting drive cylinder 202, a boosting piston telescopic rod 203, and a boosting stabilizing connecting frame 204; the boosting support frame 201 is disposed on one end of the support frame 1, the boosting drive cylinder 202 is connected to the boosting support frame 201, and the boosting drive cylinder 202 is drivenly connected to the boosting piston telescopic rod 203; the boosting stabilizing connecting frame 204 is movably disposed on the side of the boosting support frame 201, and the boosting piston telescopic rod 203 is drively connected to the boosting stabilizing connecting frame 204.

[0033] Furthermore, the air expansion sealing structure 3 includes an internal expansion cylinder 301, an internal expansion piston rod 302, an internal expansion receiving end 303, an internal expansion moving part 304, an air guide end cap 305, an internal expansion sealing ring 306, and an air guide channel 307; the internal expansion cylinder 301 is connected to the side of the pressurization stabilization connecting frame 204, the internal expansion piston rod 302 is movably disposed within the internal expansion cylinder 301, and the internal expansion cylinder 301 is drivenly connected to the internal expansion piston rod 302; the internal expansion receiving end 303 is disposed within the internal expansion cylinder. On the side of body 301, the inner expansion moving part 304 is movably disposed in the inner expansion receiving end 303, and the inner expansion piston rod 302 is pulsatorically connected to the inner expansion moving part 304; the air guide end cap 305 is disposed on the side of the inner expansion receiving end 303, the inner expansion sealing ring 306 is disposed between the air guide end cap 305 and the inner expansion receiving end 303, and the inner expansion moving part 304 is movably connected to the inner expansion sealing ring 306; the air guide channel 307 connects the inner expansion receiving end 303 and the air guide end cap 305 respectively.

[0034] Specifically, when the booster drive cylinder 202 is started, an external air source can be connected to its interior, thereby causing the booster drive cylinder 202 to drive the booster piston telescopic rod 203 to reciprocate to extend or retract, thereby driving the booster stabilizing connecting frame 204 to reciprocate forward or backward on the side of the booster support frame 201, so that the air expansion sealing structure 3 follows the booster stabilizing connecting frame 204 to move forward or backward.

[0035] Specifically, when the internal expansion cylinder 301 is activated, an external air source can connect to the inside of the device, thereby causing the internal expansion cylinder 301 to drive the internal expansion piston rod 302 to reciprocate forward or backward; the inner cavity of the end 303 of the internal expansion device is a hollow structure, and an air intake valve can be opened on its side so that the external high-pressure gas can enter its inner cavity through the air intake valve, and then enter the air guide end cover 305 from the air guide channel 307, and then enter the inner cavity of the external gas pipeline to be tested from the air guide end cover 305.

[0036] Furthermore, the inner expansion moving part 304 is movably disposed within the inner expansion receiving end 303. When the inner expansion piston rod 302 drives the inner expansion moving part 304 to reciprocate forward or backward within the inner expansion receiving end 303, the outer edge of the inner expansion moving part 304 can be a slightly tapered structure, with a small end and a larger side near the inner expansion piston rod 302. Thus, when the inner expansion moving part 304 moves forward, the inner expansion sealing ring 306, which is movably sleeved outside the inner expansion moving part 304, can be expanded. The inner expansion sealing ring 306 can be a rubber structure, so that when the inner expansion sealing ring 306 is expanded, it can tightly seal the inner cavity of the gas pipe port to be tested. Subsequently, when the inner expansion piston 302 drives the inner expansion moving part 304 to retract, the outer edge of the inner expansion sealing ring 306 can be reduced to release the sealing connection to the gas pipe port.

[0037] Furthermore, the locking mechanism 5 includes a locking base 501, a locking action cylinder 502, a locking telescopic piston rod 503, a swing link 504, and a locking limit block 505. The locking base 501 is disposed on the support frame 1, the locking action cylinder 502 is movably disposed on the locking base 501, and the locking action cylinder 502 is drivenly connected to the locking telescopic piston rod 503. The middle part of the swing link 504 is movably disposed on the limit bracket 4, one end of the swing link 504 is connected to the locking telescopic piston rod 503, and the other end of the swing link 504 is connected to the locking limit block 505. The locking limit block 505 is movably disposed on the limit bracket 4.

[0038] Specifically, when the gas pipeline to be tested is placed on the limiting bracket 4, the locking cylinder 502 is activated. The locking cylinder 502 is a cylinder-operated mechanism, which, with the assistance of an external gas source, drives the locking telescopic piston rod 503 to extend or retract. Thus, the locking telescopic piston rod 503 drives the swing connecting rod 504 to swing back and forth along its support point with the limiting bracket 4. When the telescopic piston rod 503 extends, it can drive the connecting end of the swing connecting rod 504 and the locking limiting block 505 to move downward, so that the locking limiting block 505 cooperates with the limiting bracket 4 to limit and clamp the gas pipeline to be tested in the vertical direction.

[0039] Furthermore, the detection fixture 6 includes a fixture support 601, a fixture body 602, a fixture limiting block 603, a fixture sealing ring 604, and a fixture detection air passage 605; the fixture support 601 is disposed on the support platform 1, the fixture body 602 is disposed on the fixture support 601, a plurality of fixture limiting blocks 603 are evenly distributed on the side of the fixture body 602, the fixture sealing ring 604 is disposed on the side of the fixture body 602 between the plurality of fixture limiting blocks 603, and the fixture detection air passage 605 is disposed in the fixture body 602.

[0040] Furthermore, the sensor actuation mechanism 7 includes a sensor bracket 701, a sensor actuation cylinder 702, a sensor telescopic piston rod 703, and a measuring sensor 704; the sensor bracket 701 is disposed adjacent to the clamp bracket 601 on the support frame 1, the sensor actuation cylinder 702 is disposed on the sensor bracket 701, the sensor actuation cylinder 702 is drivenly connected to the sensor telescopic piston rod 703, the measuring sensor 704 is connected to one end of the sensor telescopic piston rod 703, and the measuring sensor 704 is movably connected to the clamp detection air passage 605.

[0041] Specifically, when the airtightness of the gas pipeline is tested, the sensing cylinder 702 drives the sensing telescopic piston rod 703 to extend, thereby causing the measuring sensor 704 to abut against the side of the clamp body 602 and connect with the port of the clamp detection air passage 605. Then, external high-pressure gas is introduced into the inner cavity of the gas pipeline to be tested from the air guide channel 307 through the air guide end cap 305. At this time, the measuring sensor 704 can detect parameters such as the gas pressure in the inner cavity of the gas pipeline to be tested by clamping the air passage 605 with the clamp. The differential pressure method can be used to determine whether the airtightness of this section of the gas pipeline meets the design requirements.

[0042] In summary, the pressure pipeline airtightness testing device of this utility model is provided with a support frame 1, a pressurization drive mechanism 2, an air expansion sealing structure 3, a limiting bracket 4, a locking mechanism 5, a testing fixture 6, and a sensor actuation mechanism 7. The pressurization drive mechanism 2 is arranged on one side of the support frame 1, and the air expansion sealing structure 3 is arranged on the support frame 1. The pressurization drive mechanism 2 and the air expansion sealing structure 3 are drivenly connected. The limiting bracket 4 is arranged adjacent to the locking mechanism 5 and is arranged between the testing fixture 6 and the air expansion sealing structure 3. The testing fixture 6 is arranged on the other side of the support frame 1 relative to the pressurization drive mechanism 2. The sensor actuation mechanism 7 is arranged adjacent to the testing fixture 6 and is movably connected to the testing fixture 6. This utility model discloses a pressure pipeline airtightness testing device. The device utilizes a pressurizing drive mechanism 2 to press one end of the gas pipe under test against the side of the testing clamp 6, while the other end of the gas pipe is sealed internally by the air-expansion sealing structure 3. After air is continuously injected into the gas pipe under test using the air-expansion sealing structure 3, and provided there is no gas leakage in the testing clamp 6, the airtightness of the gas pipeline under high pressure can be verified using the sensor action mechanism 7, based on the principle of differential pressure airtightness testing. Therefore, this utility model's pressure pipeline airtightness testing device solves the technical problem of how to perform airtightness testing on a single section of gas pipeline.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pressure pipe air tightness testing device characterized by, It includes: support rack (1), supercharged drive mechanism (2), air inflation sealing structure (3), limit support (4), locking mechanism (5), detection clamp (6) and sensor action mechanism (7); One side of the support rack (1) is provided with the supercharged drive mechanism (2), the air inflation sealing structure (3) is arranged on the support rack (1), the supercharged drive mechanism (2) is drivingly connected with the air inflation sealing structure (3); The limit support (4) is arranged between the detection clamp (6) and the air inflation sealing structure (3), and the limit support (4) is arranged adjacent to the locking mechanism (5); The detection clamp (6) is arranged on the other side of the support rack (1) relative to the supercharged drive mechanism (2), and the sensor action mechanism (7) is arranged adjacent to the detection clamp (6), and the sensor action mechanism (7) is movably connected with the detection clamp (6).

2. The apparatus for detecting gas tightness of a pressure pipeline according to claim 1, wherein: The supercharged drive mechanism (2) has a supercharged support frame (201), a supercharged drive cylinder (202), a supercharged piston telescopic rod (203) and a supercharged stable connecting frame (204).

3. The apparatus for detecting gas tightness of a pressure pipeline according to claim 2, characterized in that: The supercharged support frame (201) is arranged on one end side of the support rack (1), the supercharged drive cylinder (202) is connected with the supercharged support frame (201), and the supercharged drive cylinder (202) is drivingly connected with the supercharged piston telescopic rod (203); The supercharged stable connecting frame (204) is movably arranged on the side surface of the supercharged support frame (201), and the supercharged piston telescopic rod (203) is drivingly connected with the supercharged stable connecting frame (204).

4. The apparatus for detecting gas tightness of a pressure pipeline according to claim 3, wherein: The air inflation sealing structure (3) has an inflation action cylinder body (301), an inflation piston rod (302), an inflation containing end (303), an inflation moving part (304), a gas guide end cover (305), an inflation sealing ring (306) and a gas guide channel (307).

5. A device for detecting leaks in a pressure pipe according to claim 4, characterized in that: The inflation action cylinder body (301) is connected to the side surface of the supercharged stable connecting frame (204), the inflation piston rod (302) is movably arranged in the inflation action cylinder body (301), and the inflation action cylinder body (301) is drivingly connected with the inflation piston rod (302); The inflation containing end (303) is arranged on the side surface of the inflation action cylinder body (301), the inflation moving part (304) is movably arranged in the inflation containing end (303), and the inflation piston rod (302) is drivingly connected with the inflation moving part (304); The gas guide end cover (305) is arranged on the side surface of the inflation containing end (303), the inflation sealing ring (306) is arranged between the gas guide end cover (305) and the inflation containing end (303), and the inflation moving part (304) is movably connected with the inflation sealing ring (306); The gas guide channel (307) is connected with the inflation containing end (303) and the gas guide end cover (305) respectively.

6. A device for detecting the gas tightness of a pressure pipe according to claim 5, characterized in that: The locking mechanism (5) has a locking base (501), a locking action cylinder (502), a locking telescopic piston rod (503), a swing connecting rod (504) and a locking limit block (505).

7. A pressure pipe gas tightness detection device according to claim 6, characterized in that: The locking base (501) is arranged on the support rack (1), the locking action cylinder (502) is movably arranged on the locking base (501), and the locking action cylinder (502) is drivingly connected with the locking telescopic piston rod (503); the middle part of the swing connecting rod (504) is movably arranged on the limiting support (4), one end of the swing connecting rod (504) is connected with the locking telescopic piston rod (503), and the other end of the swing connecting rod (504) is connected with the locking limit block (505), and the locking limit block (505) is movably arranged on the limiting support (4).

8. The apparatus for detecting gas tightness of a pressure pipeline according to claim 7, wherein: The detection clamp (6) has a clamp support (601), a clamp body (602), a clamp limit block (603), a clamp sealing ring (604) and a clamp detection air channel (605).

9. The apparatus for detecting gas tightness of a pressure pipeline according to claim 8, wherein: The clamp support (601) is arranged on the support rack (1), the clamp body (602) is arranged on the clamp support (601), a plurality of clamp limit blocks (603) are evenly distributed on the side surface of the clamp body (602), the clamp sealing ring (604) is arranged on the side surface of the clamp body (602) between the plurality of clamp limit blocks (603), and the clamp detection air channel (605) is arranged in the clamp body (602).

10. The apparatus for detecting gas tightness of a pressure pipeline according to claim 9, wherein: The sensor action mechanism (7) has a sensing support (701), a sensing action cylinder (702), a sensing telescopic piston rod (703) and a measurement sensor (704); the sensing support (701) is arranged adjacent to the clamp support (601) on the support rack (1), the sensing action cylinder (702) is arranged on the sensing support (701), the sensing action cylinder (702) is drivingly connected with the sensing telescopic piston rod (703), the measurement sensor (704) is connected to one end of the sensing telescopic piston rod (703), and the measurement sensor (704) is movably connected with the clamp detection air channel (605).

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