Pipe orifice sealing structure for pipeline sealing performance detection

Abstract

The utility model discloses a pipe orifice sealing structure for pipeline sealing performance detection, which comprises a sealing structure body installed in a pipe orifice, the sealing structure body comprises an elastic sealing body, an adjusting rod, a driving part and an extrusion assembly, the elastic sealing body is plugged into the pipe orifice, and the circumferential surface of the elastic sealing body is attached to the inner wall of the pipe orifice; the adjusting rod is slidably sleeved with the elastic sealing body and the extrusion assembly, and the driving piece drives the adjusting rod to move along the axis of the adjusting rod and drives the extrusion assembly to extrude the elastic sealing body so that the elastic sealing body can expand to seal the pipe opening. According to the star-shaped structure, the sealing structure of the end part of the pipe orifice is improved, the sealing structure which is detachable, low in cost and easy to operate is used for replacing the original welding mode, the star-shaped structure can be repeatedly used, and the detection cost and the detection time are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline sealing detection, in particular to a pipe opening sealing structure used for pipeline sealing detection. Background Art

[0002] In the production of metal aeration pipes, due to the large amount of welding operations involved in the pipelines, equipment manufacturers are required to perform gas tightness tests on the metal pipes (non-high pressure). Some aeration pipes have open ends. In such cases, the tightness test is usually carried out by welding threads or flanges on the ends of the branches, and then testing by installing metal plugs / blind plates. After the test is completed, the threads / flanges are removed. The removed threads or flanges cannot be used again, which greatly wastes raw materials and increases the workload of workers. Utility Model Content

[0003] The purpose of the utility model is to provide a pipe mouth sealing structure for pipeline sealing detection. By improving the structure of the pipe mouth end sealing, a detachable, low-cost, easy-to-operate sealing structure is used to replace the original welding method, which can be reused, which will greatly reduce the detection cost and detection time.

[0004] In order to solve the above technical problems, the present invention adopts the following solutions:

[0005] A pipe mouth sealing structure for pipeline sealing detection includes a sealing structure body installed in the pipe mouth, the sealing structure body includes an elastic sealing body, an adjusting rod, a driving member, and an extrusion assembly. The elastic sealing body is inserted into the pipe mouth and its circumferential surface is in contact with the inner wall of the pipe mouth. The adjusting rod is slidingly connected with the elastic sealing body and the extrusion assembly. The driving member drives the adjusting rod to move along the axis of the adjusting rod and drives the extrusion assembly to extrude the elastic sealing body so that the elastic sealing body expands to seal the pipe mouth.

[0006] In this solution, the elastic sealing body is inserted into the pipe mouth, and its circumferential surface can fit tightly with the inner wall of the pipe mouth. Fitting is the basis of sealing. The adjusting rod is slidably connected with the elastic sealing body and the extrusion assembly. The adjusting rod, the elastic sealing body and the extrusion assembly can move relative to each other. When the driving member drives the adjusting rod to move, the extrusion assembly will exert pressure on the elastic sealing body, causing it to expand and fit more tightly to the inner wall of the pipe mouth, thereby achieving a better seal. After the inspection is completed, the driving member is rotated in the opposite direction again to allow the extrusion assembly to release the extrusion of the elastic sealing body, and then the entire sealing structure body is removed from the pipe mouth. The sealing structure body is detachably connected to the pipeline, which reduces the loading and unloading time, thereby reducing the inspection time. The structure is simple and easy to operate. The sealing structure replaces the original welding method and is reusable, which will greatly reduce the inspection cost.

[0007] Optionally, the adjusting rod is a threaded rod, one end of which is provided with a baffle located on the inside of the pipe mouth, and the other end simultaneously passes through the elastic sealing body and the extrusion assembly to extend to the outside of the pipe mouth. The end of the adjusting rod located on the outside of the pipe mouth is threadedly connected to the driving member, and the driving member is screwed to drive the adjusting rod to move along the axis of the adjusting rod and drive the extrusion assembly to extrude the elastic sealing body so that the elastic sealing body expands and seals the pipe mouth.

[0008] Optionally, a first through hole allowing the adjustment rod to pass through is provided in the middle of the elastic sealing body.

[0009] Optionally, the elastic sealing body is provided with a plurality of annular cavities, the plurality of annular cavities are arranged at intervals along the length direction of the elastic sealing body, and the plurality of annular cavities are arranged between the outer wall of the elastic sealing body and the inner wall of the first through hole.

[0010] Optionally, a flow channel is provided between the annular cavity and the first through hole, and the flow channel connects the air path between the annular cavity and the first through hole.

[0011] Optionally, the extrusion assembly includes a first extrusion plate and a second extrusion plate, and the first extrusion plate and the second extrusion plate are provided with a second through hole that allows the adjusting rod to pass through. The first extrusion plate is located on the outside of the pipe mouth and has a diameter larger than the outer diameter of the pipe mouth, and the second extrusion plate is located on the inside of the pipe mouth and has a diameter smaller than the inner diameter of the pipe mouth. The second extrusion plate is located between the elastic sealing body and the baffle, and the screwing drive drives the adjusting rod to move along the axis of the adjusting rod and drives the first extrusion plate and the second extrusion plate to squeeze the elastic sealing body so that the elastic sealing body expands and seals the pipe mouth.

[0012] Optionally, a first sealing ring is embedded in the end surface of the first extrusion plate opposite to the elastic sealing body. When the elastic sealing body is extruded, the first sealing ring is circumferentially pressed between the first extrusion plate and the end surface of the pipe mouth.

[0013] Optionally, a second sealing ring is embedded in the end surface of the second extrusion plate opposite to the baffle plate. When the elastic sealing body is extruded, the second sealing ring is circumferentially pressed between the second extrusion plate and the baffle plate.

[0014] Optionally, the driving member is a locking nut, and an internal threaded hole adapted for the adjusting rod is provided in the middle of the locking nut.

[0015] Optionally, the baffle and the adjusting rod are integrally formed, and the baffle and the adjusting rod constitute a single-threaded rod.

[0016] The utility model has the beneficial effects:

[0017] 1. In the present invention, the elastic sealing body is inserted into the pipe mouth, and its circumferential surface can fit tightly with the inner wall of the pipe mouth. Fitting is the basis of sealing. The adjusting rod is slidably connected with the elastic sealing body and the extrusion assembly. The adjusting rod, the elastic sealing body and the extrusion assembly can move relative to each other. When the driving member drives the adjusting rod to move, the extrusion assembly will exert pressure on the elastic sealing body to make it expand and fit more tightly to the inner wall of the pipe mouth, thereby achieving better sealing. After the inspection is completed, the driving member is screwed in the opposite direction again to allow the extrusion assembly to release the extrusion of the elastic sealing body, and then the entire sealing structure body is taken out from the pipe mouth. The sealing structure body is detachably connected to the pipeline, which reduces the loading and unloading time, thereby reducing the inspection time. The structure is simple and easy to operate. The sealing structure replaces the original welding method and is reusable, which will greatly reduce the inspection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model after being assembled with the aeration pipe;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 3 It is a cross-sectional structural diagram of the utility model;

[0021] Figure 4 This is a structural diagram of the utility model installed at the pipe mouth;

[0022] Figure 5 Schematic diagram of the cross-sectional structure of the elastic sealing body.

[0023] Figure markings: 1-main pipe, 2-branch pipe, 3-blind plate, 4-pipe mouth, 5-sealing structure body, 6-elastic sealing body, 7-adjusting rod, 8-first extrusion plate, 9-driving member, 10-second extrusion plate, 11-baffle, 12-first sealing ring, 13-second sealing ring, 14-first through hole, 15-second through hole, 16-annular cavity, 17-flow channel. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0025] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] Example

[0028] A pipe mouth sealing structure for pipeline sealing detection includes a sealing structure body 5 installed in the pipe mouth 4, the sealing structure body 5 includes an elastic sealing body 6, an adjusting rod 7, a driving member 9, and an extrusion assembly. The elastic sealing body 6 is inserted into the pipe mouth 4 and its circumferential surface is in contact with the inner wall of the pipe mouth 4. The adjusting rod 7 is slidably connected with the elastic sealing body 6 and the extrusion assembly. The driving member 9 drives the adjusting rod 7 to move along the axis of the adjusting rod 7 and drives the extrusion assembly to extrude the elastic sealing body 6 so that the elastic sealing body 6 expands to seal the pipe mouth 4.

[0029] In this embodiment, Figure 1 As shown, the elastic sealing body 6 is made of rubber material and is cylindrical and matches the inner diameter of the pipe mouth 4. Before testing the sealing performance of the pipeline, Figure 4As shown, the circumferential surface of the elastic sealing body 6 can fit tightly with the inner wall of the pipe mouth 4, the elastic sealing body 6 is inserted into the pipe mouth 4, the adjusting rod 7 is slidably connected with the elastic sealing body 6 and the extrusion assembly, and the adjusting rod 7 and the elastic sealing body 6 and the extrusion assembly can move relative to each other. When the driving member 9 drives the adjusting rod 7 to move, the extrusion assembly will exert pressure on the elastic sealing body 6 to make it expand and fit more tightly to the inner wall of the pipe mouth 4, thereby achieving a better seal. After the inspection is completed, the driving member 9 is screwed in the opposite direction again to allow the extrusion assembly to release the extrusion of the elastic sealing body 6, and then the entire sealing structure body 5 is taken out from the pipe mouth 4. The sealing structure body 5 is detachably connected to the pipeline, which reduces the loading and unloading time, thereby reducing the inspection time. It has a simple structure and is easy to operate. The sealing structure replaces the original welding method and is reusable, which will greatly reduce the inspection cost.

[0030] Furthermore, the adjusting rod 7 is a threaded rod, one end of the adjusting rod 7 is provided with a baffle 11 located on the inner side of the pipe mouth 4, and the other end passes through the elastic sealing body 6 and the extrusion assembly to extend to the outside of the pipe mouth 4. The end of the adjusting rod 7 located on the outside of the pipe mouth 4 is threadedly connected to the driving member 9. Screwing the driving member 9 drives the adjusting rod 7 to move along the axis of the adjusting rod 7 and drives the extrusion assembly to extrude the elastic sealing body 6 so that the elastic sealing body 6 expands and seals the pipe mouth 4.

[0031] Specifically, such as Figure 2 and Figure 3 As shown, to seal the nozzle 4, the operator turns the driver 9. Because the driver 9 and the adjustment rod 7 are threaded together, the turning action translates into linear movement of the adjustment rod 7. As the adjustment rod 7 moves, it drives the extrusion assembly to apply pressure to the elastic sealing body 6. Under this pressure, the elastic sealing body 6 expands and fits tightly against the inner wall of the nozzle 4, achieving a seal. By precisely controlling the travel distance of the adjustment rod 7 by turning the driver 9, the degree of extrusion of the elastic sealing body 6 can be adjusted.

[0032] Furthermore, a first through hole 14 is provided in the middle of the elastic sealing body 6 to allow the adjustment rod 7 to pass through.

[0033] Furthermore, a plurality of annular cavities 16 are provided in the elastic sealing body 6 , and the plurality of annular cavities 16 are arranged at intervals along the length direction of the elastic sealing body 6 , and the plurality of annular cavities 16 are arranged between the outer wall of the elastic sealing body 6 and the inner wall of the first through hole 14 .

[0034] Furthermore, a flow channel 17 is provided between the annular cavity 16 and the first through hole 14 , and the flow channel 17 connects the gas path between the annular cavity 16 and the first through hole 14 .

[0035] Specifically, such as Figure 3 and Figure 5As shown, a plurality of annular cavities 16 are provided inside the elastic sealing body 6 at intervals along its length direction, and the annular cavities 16 are connected to the first through hole 14 through the flow channel 17. In the process of the extrusion assembly extruding the elastic sealing body 6, the presence of the annular cavity 16 can reduce the difficulty of extruding the elastic sealing body 6, making the elastic sealing body 6 more easily deformed and expanded under pressure, thereby accelerating the sealing efficiency. At the same time, the flow channel 17 connects the annular cavity 16 and the first through hole 14. When the elastic sealing body 6 is extruded, the air in the annular cavity 16 can be discharged, thereby preventing the air pressure inside the annular cavity 16 from hindering the deformation and expansion of the elastic sealing body 6.

[0036] Furthermore, the extrusion assembly includes a first extrusion plate 8 and a second extrusion plate 10. The first extrusion plate 8 and the second extrusion plate 10 are provided with a second through hole 15 that allows the adjusting rod 7 to pass through. The first extrusion plate 8 is located on the outside of the pipe mouth 4 and its diameter is larger than the outer diameter of the pipe mouth 4. The second extrusion plate 10 is located on the inside of the pipe mouth 4 and its diameter is smaller than the inner diameter of the pipe mouth 4. The second extrusion plate 10 is located between the elastic sealing body 6 and the baffle 11. The screwing drive 9 drives the adjusting rod 7 to move along the axis of the adjusting rod 7 and drives the first extrusion plate 8 and the second extrusion plate 10 to squeeze the elastic sealing body 6 so that the elastic sealing body 6 expands to seal the pipe mouth 4.

[0037] Furthermore, a first sealing ring 12 is embedded in the end surface of the first extrusion plate 8 opposite to the elastic sealing body 6. When the elastic sealing body 6 is extruded, the first sealing ring 12 is circumferentially pressed between the first extrusion plate 8 and the end surface of the pipe mouth 4.

[0038] Furthermore, a second sealing ring 13 is embedded in the end surface of the second extrusion plate 10 opposite to the baffle 11 . When the elastic sealing body 6 is extruded, the second sealing ring 13 is circumferentially pressed between the second extrusion plate 10 and the baffle 11 .

[0039] Furthermore, the driving member 9 is a locking nut, and an internal threaded hole adapted for the adjusting rod 7 is provided in the middle of the locking nut.

[0040] Furthermore, the baffle 11 and the adjusting rod 7 are integrally formed, and the baffle 11 and the adjusting rod 7 constitute a single-threaded rod.

[0041] The working principle of this utility model is as follows: Figure 1As shown, a pressure gauge and a gas connection port are installed in the aeration pipeline to be tested. The pressure gauge is used to detect the pressure after ventilation in the pipeline, and the gas connection port is used to connect the gas source. In the aeration pipeline, one end is the main pipe 1 with a welded flange port, and the other end is the branch pipe 2. The end of the branch pipe 2 is an open design. When performing a sealing test, a blind plate 3 can be installed on the flange end, and a sealing structure body 5 is installed on the end of the branch pipe 2. The end of the adjusting rod 7 with a baffle 11 is extended into the pipe mouth 4 until the end face of the elastic sealing body 6 is flush with the end face of the pipe mouth 4, and then the first extrusion plate 8 is pushed to fit the end face of the pipe mouth 4. The first extrusion plate 8 and the second extrusion plate 10 are both circular plates. The diameter of the first extrusion plate 8 is larger than the outer diameter of the branch pipe 2, and the outer diameter of the second extrusion plate 10 is smaller than the inner diameter of the pipe. The gap is greater than 4mm to prevent friction with the inner wall of the branch pipe 2. At the same time, the friction between the first extrusion plate 8 and the end face of the pipe mouth 4 is used to screw the locking nut to prevent the elastic sealing body 6 from rotating during the screwing of the locking nut. It is best to clamp the adjusting rod 7 with a tool to prevent the adjusting rod 7 from rotating when screwing the locking nut. Before the gas source is connected, turn the locking nut clockwise, the adjusting rod 7 moves axially, and the baffle 11 is mobilized to squeeze the second squeezing plate 10. At the same time, the first squeezing plate 8 will also squeeze the elastic sealing body 6. At this time, the elastic sealing body 6 will expand due to the squeezing, filling the entire pipe mouth 4 to achieve the purpose of sealing. Furthermore, the first sealing ring 12 can seal the gap between the pipe mouth 4 and the first squeezing plate 8, and the second sealing ring 13 can seal the gap between the baffle 11 and the second squeezing plate 10, further improving the sealing performance. At this time, the gas sealing performance test can be carried out. After the test is completed, loosen the locking nut in the opposite direction, and the elastic sealing body 6 can be removed after shrinking. Figure 3 As shown, in order to speed up the inspection efficiency, before installing the sealing structure, the operator directly adjusts the first extrusion plate 8 and the second extrusion plate 10 to contact both ends of the elastic sealing body 6, and allows the baffle 11 to contact the second extrusion plate 10, and then inserts the sealing structure into the pipe mouth 4. In this way, the locking nut does not need to be screwed a large number of turns, and the two extrusion plates can squeeze the elastic sealing body 6.

[0042] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A pipe orifice sealing structure for pipeline sealing detection, comprising a sealing structure body (5) installed in a pipe orifice (4), characterized in that: The sealing structure body (5) comprises an elastic sealing body (6), an adjusting rod (7), a driving member (9), and an extrusion assembly. The elastic sealing body (6) is inserted into the pipe mouth (4) and its circumferential surface is in contact with the inner wall of the pipe mouth (4). The adjusting rod (7) is slidably connected with the elastic sealing body (6) and the extrusion assembly. The driving member (9) drives the adjusting rod (7) to move along the axis of the adjusting rod (7) and drives the extrusion assembly to extrude the elastic sealing body (6) so that the elastic sealing body (6) expands and seals the pipe mouth (4).

2. A pipe orifice sealing structure for pipeline sealing detection according to claim 1, characterized in that: The adjusting rod (7) is a threaded rod. One end of the adjusting rod (7) is provided with a baffle (11) located inside the pipe opening (4). The other end of the adjusting rod (7) passes through the elastic sealing body (6) and the extrusion assembly and extends to the outside of the pipe opening (4). The end of the adjusting rod (7) located outside the pipe opening (4) is threadedly connected to the driving member (9). The driving member (9) is screwed to drive the adjusting rod (7) to move along the axis of the adjusting rod (7) and drive the extrusion assembly to extrude the elastic sealing body (6) so that the elastic sealing body (6) expands and seals the pipe opening (4).

3. A pipe opening sealing structure for pipeline sealing detection according to claim 2, characterized in that: A first through hole (14) is provided in the middle of the elastic sealing body (6) to allow the regulating rod (7) to pass through.

4. A pipe orifice sealing structure for pipeline sealing detection according to claim 3, characterized in that: The elastic sealing body (6) is provided with a plurality of annular cavities (16), the plurality of annular cavities (16) are arranged at intervals along the length direction of the elastic sealing body (6), and the plurality of annular cavities (16) are arranged between the outer wall of the elastic sealing body (6) and the inner wall of the first through hole (14).

5. The pipe opening sealing structure for pipeline sealing detection according to claim 4, characterized in that: A flow channel (17) is provided between the annular cavity (16) and the first through hole (14), and the flow channel (17) connects the air path between the annular cavity (16) and the first through hole (14).

6. The pipe opening sealing structure for pipeline sealing detection according to claim 2, characterized in that: The extrusion assembly comprises a first extrusion plate (8) and a second extrusion plate (10). The first extrusion plate (8) and the second extrusion plate (10) are provided with a second through hole (15) for allowing the adjustment rod (7) to pass through. The first extrusion plate (8) is located outside the pipe mouth (4) and has a diameter larger than the outer diameter of the pipe mouth (4). The second extrusion plate (10) is located inside the pipe mouth (4) and has a diameter smaller than the inner diameter of the pipe mouth (4). The second extrusion plate (10) is located between the elastic sealing body (6) and the baffle (11). The screwing driving member (9) drives the adjustment rod (7) to move along the axis of the adjustment rod (7) and drives the first extrusion plate (8) and the second extrusion plate (10) to squeeze the elastic sealing body (6), so that the elastic sealing body (6) expands and seals the pipe mouth (4).

7. A pipe opening sealing structure for pipeline sealing detection according to claim 6, characterized in that: A first sealing ring (12) is embedded in the end surface of the first extrusion plate (8) opposite to the elastic sealing body (6); when the elastic sealing body (6) is extruded, the first sealing ring (12) is circumferentially pressed between the first extrusion plate (8) and the end surface of the pipe mouth (4).

8. The pipe opening sealing structure for pipeline sealing detection according to claim 6, characterized in that: A second sealing ring (13) is embedded in the end surface of the second extrusion plate (10) opposite to the baffle (11); when the elastic sealing body (6) is extruded, the second sealing ring (13) is circumferentially pressed between the second extrusion plate (10) and the baffle (11).

9. The pipe opening sealing structure for pipeline sealing detection according to claim 1, characterized in that: The driving member (9) is a locking nut, and an internal threaded hole adapted to the adjusting rod (7) is provided in the middle of the locking nut.

10. The pipe opening sealing structure for pipeline sealing detection according to claim 2, characterized in that: The baffle (11) and the regulating rod (7) are integrally formed, and the baffle (11) and the regulating rod (7) constitute a single-threaded rod.

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