A plugging device and method for pipeline pressure resistance detection

Abstract

The present invention discloses a plugging device and method for pipeline pressure resistance detection, including an operating box with a box door that rotates on the front and a positioning rubber seat at the bottom, the top of the positioning rubber seat is located in the operating box and is convexly provided with a rubber plug that matches the pipe mouth of the pipeline, a pneumatic transmission mechanism is provided on the inner top wall of the operating box, the top of the pneumatic transmission mechanism is located outside the operating box and is provided with a vent, a flexible plug is provided at the bottom and drives the flexible plug to move vertically and expand and contract, the flexible plug has an inner cavity and corresponds to the rubber plug, a pair of symmetrically located on both sides of the rubber plug and can move away from or approach the limit plate is vertically provided in the operating box, the limit plate is used to support the pipeline so that the pipeline is always vertically located between the rubber plug and the flexible plug, and when in the working state, the outer peripheral walls of the rubber plug and the flexible plug are correspondingly and tightly pressed against the inner peripheral walls of the two ports of the pipeline. The present invention solves the technical problem of how to effectively plug the pipeline conveniently and reliably.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection, and in particular to a plugging device and method for pipeline pressure resistance detection. Background Art

[0002] Pipelines are devices used to transport fluid media such as gas and liquid. Before the pipeline leaves the factory, it needs to be sealed for pressure resistance testing to prevent defective products from flowing to the client and ensure safety in use. Currently, the pipeline is sealed by fastening a plug with a sealing ring to the two ends of the pipeline with screws. Obviously, this not only leads to cumbersome operation and low sealing efficiency, but also the screws are prone to loosening during the test, resulting in low reliability and poor sealing of the plug, which affects the accuracy of the test results. Summary of the invention

[0003] In view of the deficiencies in the background technology, the present invention provides a blocking device and method for pipeline pressure resistance detection to solve the problem of how to effectively block the pipeline conveniently and reliably.

[0004] In order to solve the above technical problems, the present invention provides a sealing device for pipeline pressure resistance detection, including an operating box, a box door is rotatably installed on the front of the operating box, and a positioning rubber seat is installed on the bottom, the top of the positioning rubber seat is located in the operating box, and a rubber plug that matches the pipe mouth of the pipeline is convexly provided thereon, a pneumatic transmission mechanism is provided on the inner top wall of the operating box, the top of the pneumatic transmission mechanism is located outside the operating box and is provided with a vent, a flexible plug is installed on the bottom and drives the flexible plug to move vertically and expand and contract, the flexible plug has a hollow inner cavity and corresponds to the rubber plug, a pair of limit plates symmetrically located on both sides of the rubber plug and can move away from or approach are vertically provided in the operating box, the two limit plates are used to support the pipeline so that the pipeline is always vertically located between the rubber plug and the flexible plug, and when in working state, the outer peripheral walls of the rubber plug and the flexible plug are tightly pressed against the inner peripheral walls of the two ports of the pipeline.

[0005] In one embodiment of the present invention, the pneumatic transmission mechanism includes a pressure regulating mechanism, an inflation mechanism, a pressure plate, a vent pipe and a guide column. The pressure regulating mechanism includes a pressure regulating box, a transmission plate and a plurality of compression springs. The transmission plate is horizontally located in the pressure regulating box, and a plurality of uniformly distributed compression springs are vertically connected to the bottom. The bottom of the compression spring is fixedly connected to the inner bottom wall of the pressure regulating box. The vent is provided on the side wall of the pressure regulating box above the transmission plate. The inflation mechanism includes an inflation box and at least one inflation component. The top of the inflation box is fixedly connected to the bottom of the pressure regulating box. The inflation component is located in the inflation box, and includes a transmission rod, a pressure rod, an energy-gathering spring, and a plurality of compression springs. , a delay block, a resistance mechanism and an airbag, the airbag is vertically mounted on the inner bottom wall of the inflation box, the transmission rod is horizontally located above the airbag, the pressure rod, the energy-gathering spring and the delay block are vertically fixedly connected between the transmission rod and the airbag in sequence from top to bottom, the resistance mechanism is movably connected to the upper end of the delay block, the guide column vertically slides through the pressure regulating box and the inflation box, the transmission plate and the transmission rod are fixedly connected to the guide column, the bottom end of the guide column is fixedly connected to the pressure plate horizontally located below the inflation box, the flexible plug is installed at the bottom of the pressure plate, and its inner cavity is communicated with the airbag through the ventilation pipe.

[0006] In one embodiment of the present invention, the axes of the pressure regulating box, the inflation box and the guide column coincide with each other, and the number of the inflation components is 2 and they are symmetrically located on both sides of the guide column.

[0007] In one embodiment of the present invention, a pair of transverse cylinders are provided on the inner wall of the operation box and are transmission-connected to the limit plates accordingly.

[0008] In one embodiment of the present invention, a pair of the limiting plates are provided with arc-shaped guide grooves adapted to the outer wall of the pipe on the opposite surfaces of each other.

[0009] A pipeline plugging method is performed in the above-mentioned pipeline pressure resistance testing plugging device, comprising the following steps:

[0010] Step S1, vertically clamping the pipeline on the positioning rubber seat, and the top of the rubber plug extends into the bottom port of the pipeline;

[0011] Step S2, controlling the pair of limit plates to approach each other until the opposing surfaces of the two limit plates are pressed against the outer wall of the pipe so that the pipe is always in a vertical state;

[0012] Step S3, continuously introduce high-pressure gas into the vent. Under the action of the high-pressure gas, the pneumatic transmission mechanism first drives the flexible plug to completely enter the top port of the pipe, and then drives the pipe to be vertically pressed down to the bottom end to be tightly pressed against the positioning rubber seat. The rubber plug is completely extended into the bottom port of the pipe to seal the bottom end of the pipe. Finally, the flexible plug is driven to expand to seal the top end of the pipe, and then the introduction of high-pressure gas is stopped.

[0013] The above-mentioned technical scheme of the present invention has the following advantages over the prior art: the present invention cooperates with the positioning rubber seat, rubber plug, flexible plug, pneumatic transmission mechanism and a pair of limit plates, so that when sealing, only the pipeline needs to be vertically clamped on the positioning rubber seat, and the top of the rubber plug extends into the bottom port of the pipeline, and then the opposite surfaces of the limit plates are correspondingly pressed against the outer wall of the pipeline to make the pipeline always vertical, and finally high-pressure gas is continuously introduced into the pneumatic transmission mechanism. Under the transmission of the pneumatic transmission mechanism, the flexible plug first completely enters the top port of the pipeline, and the pipeline is then vertically pressed down to the bottom end and pressed against the positioning rubber seat, the rubber plug completely extends into the bottom port of the pipeline to seal the bottom end of the pipeline, and then the flexible plug expands to seal the top end of the pipeline, thereby realizing convenient and reliable effective sealing of the pipeline, greatly improving the convenience of operation, the efficiency of sealing and the reliability of sealing, and ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a structural schematic diagram of another viewing angle of the present invention;

[0017] Figure 3 It is a usage state diagram of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the pneumatic transmission mechanism in the present invention;

[0019] Explanation of the reference numerals in the drawings in the specification: 1. operating box, 2. box door, 3. positioning rubber seat, 4. rubber plug, 5. pneumatic transmission mechanism, 51. vent, 52. pressure regulating mechanism, 521. pressure regulating box, 522. transmission plate, 523. compression spring, 53. inflation mechanism, 531. inflation box, 532. transmission rod, 533. pressure rod, 534. energy-gathering spring, 535. delay block, 536. resistance mechanism, 537. airbag, 54. pressure plate, 55. ventilation pipe, 56. guide column, 6. flexible plug, 7. limit plate, 8. transverse cylinder. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0021] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions with reference to the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0022] Reference Figure 1 , Figure 2 and Figure 3As shown, a plugging device for pipeline pressure resistance detection includes an operation box 1, a box door 2 is rotatably installed on the front of the operation box 1, a positioning rubber seat 3 is installed on the bottom, the top of the positioning rubber seat 3 is located in the operation box 1, and a rubber plug 4 adapted to the pipe mouth of the pipeline is convexly provided on the positioning rubber seat 3, a pneumatic transmission mechanism 5 is provided on the inner top wall of the operation box 1, the top of the pneumatic transmission mechanism 5 is located outside the operation box 1 and is provided with a vent 51, a flexible plug 6 is installed on the bottom and drives the flexible plug 6 to move vertically. The flexible plug 6 has a hollow inner cavity corresponding to the rubber plug 4, and a pair of limit plates 7 symmetrically located on both sides of the rubber plug 4 and capable of moving away from or approaching the rubber plug 4 are vertically arranged in the operating box 1. The two limit plates 7 are used to support the pipeline so that the pipeline is always vertically located between the rubber plug 4 and the flexible plug 6. When in working state, the outer peripheral walls of the rubber plug 4 and the flexible plug 6 are correspondingly and tightly pressed against the inner peripheral walls of the two ports of the pipeline. By cooperating with the positioning rubber seat 3, rubber plug 4, flexible plug 6, pneumatic transmission mechanism 5 and a pair of limiting plates 7, when sealing, it is only necessary to vertically clamp the pipe on the positioning rubber seat 3, and the top of the rubber plug 4 extends into the bottom port of the pipe, and then the opposite surfaces of the limiting plates 7 are correspondingly pressed against the outer wall of the pipe to make the pipe always vertical, and finally high-pressure gas is continuously introduced into the pneumatic transmission mechanism 5. Under the drive of the pneumatic transmission mechanism 5, the flexible plug 6 first completely enters the top port of the pipe, and the pipe is then vertically pressed down to the bottom end and pressed against the positioning rubber seat 3, and the rubber plug 4 completely extends into the bottom port of the pipe to seal the bottom end of the pipe, and then the flexible plug 6 expands to seal the top end of the pipe, thereby achieving the technical effect of convenient and reliable effective sealing of the pipe.

[0023] Among them, a pair of limit plates 7 can achieve the technical effect of being able to move away or closer through the following connection relationship: a pair of transverse cylinders 8 corresponding to the limit plates 7 are provided on the inner wall of the operation box 1.

[0024] Reference Figure 4As shown, the pneumatic transmission mechanism 5 achieves the technical effect of vertical movement and expansion and contraction of the transmission flexible plug 6 through the following structure: the pneumatic transmission mechanism 5 includes a pressure regulating mechanism 52, an inflation mechanism 53, a pressure plate 54, a vent pipe 55 and a guide column 56, the pressure regulating mechanism 52 includes a pressure regulating box 521, a transmission plate 522 and a plurality of compression springs 523, the transmission plate 522 is horizontally located in the pressure regulating box 521, and a plurality of uniformly distributed compression springs 523 are vertically connected to the bottom, the bottom of the compression spring 523 is fixedly connected to the inner bottom wall of the pressure regulating box 521, and the vent 51 is arranged on the side wall of the pressure regulating box 521 above the transmission plate 522; the inflation mechanism 53 includes an inflation box 531 and at least one inflation component, the top of the inflation box 531 is fixedly connected to the bottom of the pressure regulating box 521, the inflation component is located in the inflation box 531, and includes a transmission rod 532, a pressure rod 533, energy-gathering spring 534, delay block 535, resistance mechanism 536 and airbag 537, the airbag 537 is vertically mounted on the inner bottom wall of the inflatable box 531, the transmission rod 532 is horizontally located above the airbag 537, the pressure rod 533, the energy-gathering spring 534 and the delay block 535 are vertically fixedly connected between the transmission rod 532 and the airbag 537 from top to bottom, and the resistance mechanism 536 is movable Connected to the upper end of the delay block 535, the guide column 56 slides vertically through the pressure regulating box 521 and the inflation box 531, the transmission plate 522 and the transmission rod 532 are fixedly connected to the guide column 56, and the bottom end of the guide column 56 is fixedly connected to the pressure plate 54 horizontally located below the inflation box 531, the flexible plug 6 is installed at the bottom of the pressure plate 54, and its inner cavity is connected to the air bag 537 through the ventilation pipe 55.

[0025] The axes of the pressure regulating box 521, the inflation box 531 and the guide column 56 coincide with each other. The number of the inflation components is 2 and they are symmetrically located on both sides of the guide column 56. A pair of the limit plates 7 are provided with arc-shaped guide grooves that are compatible with the outer wall of the pipe on the opposite surfaces of each other. This arrangement improves the stability of the transmission.

[0026] A pipeline plugging method is performed in the above-mentioned pipeline pressure resistance testing plugging device, comprising the following steps:

[0027] Step S1, vertically clamp the pipeline on the positioning rubber seat 3, and the top of the rubber plug 4 extends into the bottom port of the pipeline;

[0028] Step S2, controlling the pair of limit plates 7 to approach each other until the opposing surfaces of the two limit plates 7 are pressed against the outer wall of the pipe so that the pipe is always in a vertical state;

[0029] Step S3, high-pressure gas is continuously introduced into the vent 51. Under the action of high-pressure gas, the pneumatic transmission mechanism 5 first drives the flexible plug 6 to completely enter the top port of the pipeline, and then drives the pipeline to be vertically pressed down to the bottom end to be pressed against the positioning rubber seat 3. The rubber plug 4 is completely extended into the bottom port of the pipeline to seal the bottom end of the pipeline. Finally, the flexible plug 6 is driven to expand to seal the top of the pipeline, and then the high-pressure gas is stopped. This method achieves the technical effect of conveniently and reliably effectively plugging the pipeline, which is convenient to operate, has high plugging efficiency, reliable plugging, good plugging sealing, and effectively ensures the accuracy of the test results.

[0030] The working principle of the present invention is as follows: when in use, first, open the box door 2, and vertically clamp the pipe to be blocked on the positioning rubber seat 3 in the operating box 1, so that the top of the rubber plug 4 extends into the bottom port of the pipe, and then control a pair of horizontal cylinders 8 to drive the limit plates 7 to approach each other, until the opposite surfaces of the two limit plates 7 are correspondingly pressed against the outer wall of the pipe to make the pipe vertical, and then, continuously introduce high-pressure gas into the vent 51, and the transmission plate 522 moves vertically downward under the push of the high-pressure gas, and the transmission plate 522 drives the pressure plate 54 and the transmission rod 532 and the pressure rod 533 to move downward through the guide column 56, and the pressure plate 54 first drives the flexible The plug 6 is inserted into the top port of the pipe, and then the pipe is pushed so that its bottom end is tightly against the positioning rubber seat 3. The rubber plug 4 is completely inserted into the bottom port of the pipe and its outer peripheral wall is tightly against the inner peripheral wall of the bottom port of the pipe. At the same time, the pressure rod 533 squeezes the energy-gathering spring 534. The energy-gathering spring 534 is compressed and gathers elastic potential energy to the delay block 535 to push the resistance mechanism 536 apart. The delay block 535 moves downward to squeeze the airbag 537. The gas in the airbag 537 is filled into the inner cavity of the flexible plug 6 through the ventilation pipe 55. After the flexible plug 6 expands and its outer peripheral wall is tightly against the inner peripheral wall of the top port of the pipe, the high-pressure gas is stopped from entering.

[0031] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A plugging device for pipeline pressure resistance detection, characterized in that: The invention comprises an operation box, wherein a box door is rotatably installed on the front of the operation box, and a positioning rubber seat is installed on the bottom. The top of the positioning rubber seat is located in the operation box, and a rubber plug which matches the pipe mouth of the pipeline is convexly provided thereon. A pneumatic transmission mechanism is provided on the inner top wall of the operation box, and the top of the pneumatic transmission mechanism is located outside the operation box and is provided with a vent, and a flexible plug is installed on the bottom and transmits the vertical movement and expansion and contraction of the flexible plug. The flexible plug has a hollow inner cavity and corresponds to the rubber plug. A pair of limit plates which are symmetrically located on both sides of the rubber plug and can move away from or approach the rubber plug are vertically provided in the operation box, and the two limit plates are used to support the pipeline so that the pipeline is always vertically located between the rubber plug and the flexible plug. When in working state, the outer peripheral walls of the rubber plug and the flexible plug are correspondingly and tightly pressed against the inner peripheral walls of the two ports of the pipeline; The pneumatic transmission mechanism includes a pressure regulating mechanism, an inflation mechanism, a pressure plate, a vent pipe and a guide column. The pressure regulating mechanism includes a pressure regulating box, a transmission plate and a plurality of compression springs. The transmission plate is horizontally located in the pressure regulating box, and a plurality of uniformly distributed compression springs are vertically connected to the bottom. The bottom of the compression spring is fixedly connected to the inner bottom wall of the pressure regulating box, and the vent is arranged on the side wall of the pressure regulating box above the transmission plate. The inflation mechanism includes an inflation box and at least one inflation component. The top of the inflation box is fixedly connected to the bottom of the pressure regulating box. The inflation component is located in the inflation box, and includes a transmission rod, a pressure rod, an energy-gathering spring, a delay block, an anti-vibration spring, a pressure plate ... The airbag is vertically mounted on the inner bottom wall of the inflation box, the transmission rod is horizontally located above the airbag, the pressure rod, the energy-gathering spring and the delay block are vertically and fixedly connected between the transmission rod and the airbag in sequence from top to bottom, the resistance mechanism is movably connected to the upper end of the delay block, the guide column vertically slides through the pressure regulating box and the inflation box, the transmission plate and the transmission rod are fixedly connected to the guide column, the bottom end of the guide column is fixedly connected with the pressure plate horizontally located below the inflation box, the flexible plug is installed at the bottom of the pressure plate, and its inner cavity is connected to the airbag through the ventilation pipe; A pair of transverse cylinders are provided on the inner wall of the operation box and are correspondingly connected to the limit plates.

2. The sealing device for pipeline pressure resistance detection according to claim 1, characterized in that: The axes of the pressure regulating box, the inflation box and the guide column coincide with each other. The number of the inflation components is 2 and they are symmetrically located on both sides of the guide column.

3. The sealing device for pipeline pressure resistance detection according to claim 1, characterized in that: A pair of the limiting plates are provided with arc-shaped guide grooves corresponding to the outer wall of the pipeline on the opposite surfaces of each other.

4. A pipeline plugging method, characterized in that: The method is carried out in the pipeline pressure resistance detection plugging device according to any one of claims 1 to 3, comprising the following steps: Step S1, vertically clamping the pipeline on the positioning rubber seat, and the top of the rubber plug extends into the bottom port of the pipeline; Step S2, controlling the pair of limit plates to approach each other until the opposing surfaces of the two limit plates are pressed against the outer wall of the pipe so that the pipe is always in a vertical state; Step S3, continuously introduce high-pressure gas into the vent. Under the action of the high-pressure gas, the pneumatic transmission mechanism first drives the flexible plug to completely enter the top port of the pipe, and then drives the pipe to be vertically pressed down to the bottom end to be tightly pressed against the positioning rubber seat. The rubber plug is completely extended into the bottom port of the pipe to seal the bottom end of the pipe. Finally, the flexible plug is driven to expand to seal the top end of the pipe, and then the introduction of high-pressure gas is stopped.

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