Pipeline static pressure test plug device
By designing a pipeline static pressure test plug device including inner plug plate, rubber layer and outer plug plate, the cumbersome problems of flange welding and dismantling in the prior art are solved, efficient sealing and repeated use of large-diameter pipelines are achieved, and testing materials are saved.
Patent Information
- Application Number
- CN202421638635.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-05-30
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In the existing pipeline static pressure test, the welding and dismantling process of the flange as a plug device is cumbersome, which easily causes pipe wear, and the flanges of large-diameter pipelines cannot be used for secondary use, wasting test materials.
A static pressure test plug device for pipelines including inner plug plate, rubber layer and outer pressure plate is designed to block the inner gap of the pipeline through the elasticity of the rubber layer, and combine the connecting parts of screws and nuts to achieve sealing and disassembly without welding.
It realizes efficient sealing of large-diameter pipelines, is easy to disassemble, avoids pipe wear, and the device can be reused, saving test materials.
Smart Images
Figure CN222760533U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline static pressure testing, in particular to a pipeline static pressure testing plugging device. Background Art
[0002] When conducting a static pressure test on a pipeline, the end of the pipeline needs to be sealed. Flanges are often used as plugging devices. When connecting the flange to the pipeline, steel materials need to be welded, and plastic materials need to be bonded or welded. After the test is completed, the flange needs to be removed, that is, the weld is ground using a cutting machine or an angle grinder until the weld is completely removed. The operation is cumbersome, and the removal process will cause wear to the pipeline, requiring repair. When flanges are used as plugging devices for large-diameter pipelines, the welding and removal of the flanges is a large workload, and once the flange is damaged during removal, it cannot be reused, which will consume a large amount of test materials. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a pipeline static pressure test plugging device, which is mainly used for large-diameter pipeline static pressure test to achieve the purpose of good plugging effect, convenient disassembly and assembly, and repeated use.
[0004] The utility model discloses a pipeline static pressure test plug device, comprising an inner plugging plate, a rubber layer and an outer pressure plate which are arranged in sequence, the centers of the inner plugging plate, the rubber layer and the outer pressure plate are located on the same horizontal line, the outer pressure plate is in a circular shape, the outer diameter of the outer pressure plate is the same as the diameter of the inner plugging plate, the rubber layer is adhered between the inner plugging plate and the outer pressure plate, the diameter of the rubber layer is larger than the diameter of the inner plugging plate and abuts against the inner wall of the pipeline, a connecting piece for connecting the outer pressure plate and the inner plugging plate is provided on the side of the inner plugging plate away from the pipeline, and the inner plugging plate, the rubber layer and the inner wall of the pipeline form a closed space.
[0005] Furthermore, the connecting piece includes a screw and a nut, one end of the screw is fixedly connected to the inner blocking plate, and the other end passes through the rubber layer and the outer pressure plate in sequence and is threadedly connected to the nut.
[0006] As a preferred embodiment, the connecting pieces are multiple and are evenly arranged on the inner blocking plate along the circumference of the inner blocking plate.
[0007] Furthermore, a handle is provided on the side of the inner blocking plate facing away from the pipeline.
[0008] As a preferred embodiment, there are two handles which are symmetrically arranged on the inner blocking plate.
[0009] Furthermore, a pressure relief hole is provided at the center of the inner blocking plate, and a threaded plug is provided on the pressure relief hole.
[0010] Furthermore, the rubber layer is a rubber expansion ring, and the rubber expansion ring is arranged on the circumference of the outer pressure plate and the inner blocking plate.
[0011] The beneficial effects of the utility model are as follows: the pipeline static pressure test plugging device is used to seal a large-diameter pipeline that is subjected to a static pressure test, and the inner plugging plate can be directly placed in the pipeline, and the rubber layer is abutted against the inner wall of the pipeline to seal the pipeline. At the same time, the elasticity of the rubber is used to seal any gap in the pipeline, and the sealing effect is good; when the outer pressure plate and the connecting piece are set, the rubber layer is clamped between the inner plugging plate and the outer pressure plate to avoid slipping. During the installation process, the pipeline can be sealed without welding, and it is easy to disassemble. During the disassembly process, the pipeline or the pipeline static pressure test plugging device itself will not be damaged, so that the pipeline static pressure test plugging device can be repeatedly used, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 : A schematic diagram of the structure of the utility model pipeline static pressure test plug device;
[0013] Figure 2 : A schematic diagram of the structure of the utility model pipeline static pressure test plug device installed on the pipeline;
[0014] Figure numerals: 1-inner plugging plate; 11-pressure relief hole; 12-thread plug; 2-rubber layer; 3-outer pressure plate; 4-connecting piece; 41-screw; 42-nut; 5-handle; 6-pipeline; 61-inner wall of the pipe. DETAILED DESCRIPTION
[0015] The utility model is further described below.
[0016] The utility model provides a pipeline static pressure test plug device, which is mainly used for large-diameter pipeline static pressure test, and comprises an inner plugging plate 1, a rubber layer 2 and an outer pressure plate 3 which are arranged in sequence, the centers of the inner plugging plate 1, the rubber layer 2 and the outer pressure plate 3 are located on the same horizontal line, the outer pressure plate 3 is in a circular shape, the outer diameter of the outer pressure plate 3 is the same as the diameter of the inner plugging plate 1, the rubber layer 2 is adhered between the inner plugging plate 1 and the outer pressure plate 3, the diameter of the rubber layer 2 is larger than the diameter of the inner plugging plate 1 and abuts against the inner wall 61 of the pipeline, the side of the inner plugging plate 1 facing away from the pipeline 6 is provided with a connecting piece 4 for connecting the outer pressure plate 3 and the inner plugging plate 1, the inner plugging plate 1, the rubber layer 2 and the inner wall 61 of the pipeline form a closed space.
[0017] like Figure 1 , Figure 2As shown, the pipeline static pressure test plug device includes an inner plugging plate 1, a rubber layer 2 and an outer pressure plate 3. Specifically, the shape of the inner plugging plate 1 is consistent with the cross-section of the pipeline 6, but the diameter of the inner plugging plate 1 is slightly smaller than the inner diameter of the pipeline 6, so that the entire device can be installed in the pipeline 6. Specifically, the inner plugging plate 1 can be made of steel plate, and the diameter of the inner plugging plate 1 is 5mm smaller than the inner diameter of the pipeline 6, which is convenient for placing the entire plugging device in the pipeline 6 and can also be used as the main sealing device to seal the pipeline 6 to ensure a certain degree of airtightness, thereby allowing the pipeline static pressure test to proceed normally; a rubber layer 2 is arranged between the inner plugging plate 1 and the outer pressure plate 3, and the diameter of the rubber layer 2 is larger than the inner The diameter of the plugging plate 1 is in contact with the inner wall 61 of the pipe. The entire device is brought into the pipe 6 through the inner plugging plate 1, and then the inner wall 61 of the pipe is squeezed and sealed through the elastic rubber layer 2. Since the rubber layer 2 is elastic, it can be deformed accordingly according to the squeezing of the inner wall 61 of the pipe, so that it can completely fill the gap of the inner wall 61 of the pipe, ensuring the tightness of the pipe static pressure test plug device to the inner wall 61 of the pipe. The rubber layer 2 can be specifically cut from rubber with high heat resistance, good toughness, good pressure resistance and large thickness. The cutting edges should be neat to ensure the tightness of the extrusion and expansion on the pipe wall. When bonding, a special rubber for bonding rubber and metal should be used. Glue, during bonding, bubbling should be avoided to ensure bonding stability; an annular outer pressure plate 3 is set to squeeze the rubber layer 2 between the outer pressure plate 3 and the inner plugging plate 1, the outer diameter of the outer pressure plate 3 is consistent with the diameter of the inner plugging plate 1, and the outer pressure plate 3 is set to clamp the rubber layer 2 between the inner plugging plate 1 and the outer pressure plate 3, provide pressure for the rubber layer 2, and facilitate the entire device to be pressed into the pipeline 6. Compared with the circular outer pressure plate 3, the use of an annular outer pressure plate 3 can reduce the weight of the entire device and reduce the labor intensity of the operator. Specifically, the outer pressure plate 3 is made of steel plate, and the width of the ring is 50mm, and the outer pressure plate 3 is also drilled There is a drill hole for the connecting piece 4 to pass through; a connecting piece 4 for connecting the outer pressure plate 3 and the inner baffle plate 1 is provided on the inner baffle plate 1, and the connecting piece 4 penetrates the rubber layer 2 to connect the outer pressure plate 3 and the inner baffle plate 1 to prevent the rubber layer 2 from slipping out from between the inner baffle plate 1 and the outer pressure plate 3 during use. Specifically, the connecting piece 4 can be a pin or a bolt; the centers of the inner baffle plate 1, the rubber layer 2 and the outer pressure plate 3 are maintained on the same horizontal line, that is, the center and the center of gravity of the plug device are located at the same point, so that when the entire pipeline static pressure test plug device is installed in the pipeline 6, it can always be located in the same plumb plane and perpendicular to the pipeline 6, thereby ensuring the airtightness of the pipeline 6.The pipeline static pressure test plugging device is used to seal a large-diameter pipeline undergoing a static pressure test. The inner plugging plate 1 can be directly placed in the pipeline 6, and the rubber layer 2 is abutted against the inner wall 61 of the pipeline to seal the pipeline 6. At the same time, the elasticity of the rubber is used to seal any gap in the pipeline 6, and the sealing effect is good; when the outer pressure plate 3 and the connecting piece 4 are set, the rubber layer 2 is clamped between the inner plugging plate 1 and the outer pressure plate 3 to avoid slipping. During the installation process, the pipeline 6 can be sealed without welding, and it is easy to disassemble. It only needs to release the pressure after the test is completed, and then push the lower end of the inner plugging plate 1 to the side of the pipeline 6 away from the outer pressure plate 3, so that the whole device is in a tilted state in the pipeline 6, and then it is taken out therefrom. During the disassembly process, the pipeline 6 or the pipeline static pressure test plugging device itself will not be damaged, so that the pipeline static pressure test plugging device can be reused to save costs.
[0018] After the pipeline static pressure test plug device is installed, there is still a gap between the rubber layer 2 and the inner wall 61 of the pipeline due to the process or installation, and the installation position needs to be repeatedly adjusted. In order to reduce the number of adjustments and ensure that the rubber layer 2 can block any position of the inner wall 61 of the pipeline; the connecting member 4 includes a screw 41 and a nut 42, one end of the screw 41 is fixedly connected to the inner plugging plate 1, and the other end passes through the rubber layer 2 and the outer pressure plate 3 in sequence and is threadedly connected with the nut 42; the screw 41 adopts a full-thread screw 41, and is welded to the inner plugging plate 1 by spot welding to avoid the screw nut 42 from being screwed when the screw nut 4 is screwed. 2, the screw 41 is driven to rotate, affecting the pressure of the outer pressure plate 3 on the rubber layer 2; since the rubber layer 2 has a certain elasticity, screwing the nut 42 will reduce the distance between the outer pressure plate 3 and the inner plugging plate 1, and squeeze the rubber layer 2 between the outer pressure plate 3 and the inner plugging plate 1, so that the rubber layer 2 extends away from the center of the outer pressure plate 3 and the inner plugging plate 1, that is, it is in close contact with the inner wall 61 of the pipe, ensuring the tightness of the pipe static pressure test plug device to the pipe 6; it should be noted that before installing the plug device, the screw 41 and the nut 42 need to be installed to avoid jamming when the nut 42 is screwed. Furthermore, in order to deal with the situation where there is a slight gap between the rubber layer 2 and the inner wall 61 of the pipe at different positions that needs to be adjusted, the connecting piece 4 is multiple and is evenly arranged on the inner plugging plate 1 along the circumference of the inner plugging plate 1; specifically, as Figure 1 As shown, there are 10 groups of connecting parts 4, which are evenly arranged on the inner baffle plate 1 around the circumference of the inner baffle plate 1 and connected to the outer pressure plate 3; with such an arrangement, the distance between the inner baffle plate 1 and the outer pressure plate 3 at the location where there is a gap with the inner wall 61 of the pipe can be adjusted in a targeted manner, thereby squeezing the rubber layer 2 at this position to extend outward, and then closely contact with the inner wall 61 of the pipe, thereby ensuring the tightness of the pipe static pressure test plug device to the pipe 6.
[0019] To facilitate the removal of the pipeline hydrostatic test plugging device by the operator after the pipeline hydrostatic test, a handle 5 is further provided on the side of the inner plugging plate 1 facing away from the pipeline 6. Specifically, the handle 5 can be bent from a steel bar with a diameter of 10 mm. When bending, a certain arc is used at the turning point, and then the same length is intercepted on both sides of the handle 5 to form a "冂"-shaped structure for the operator to hold. The handle 5 is fixedly connected to the inner plugging plate 1 by welding. Specifically, full welding is used between the handle 5 and the inner plugging plate 1, and the welding joint between the lower part of the handle 5 and the inner plugging plate 1 needs to be polished to enhance the strength of the connection of the handle 5. Further, to facilitate the operator to pick up and place the pipeline hydrostatic test plugging device with both hands, two handles 5 are provided and symmetrically arranged on the inner plugging plate 1. With such an arrangement, it is not only convenient for the operator to pick up and place the pipeline hydrostatic test plugging device, but also ensures that when the pipeline hydrostatic test plugging device is installed into the pipeline 6, the device can always remain in the same vertical plane when placed in the pipeline 6 and will not tilt, resulting in seal failure.
[0020] To facilitate the removal of the pipeline hydrostatic test plugging device after the pipeline hydrostatic test, a pressure relief hole 11 is provided at the center of the inner plugging plate 1, and a plug 12 is provided on the pressure relief hole 11 with a screw thread connection to the pressure relief hole 11. The pressure relief hole 11 is drilled at the center of the inner plugging plate 1, and the plug 12 is arranged on the pressure relief hole 11. When installing the pipeline hydrostatic test plugging device, the plug 12 is opened to balance the air pressure inside and outside the pipeline 6 during installation, avoiding excessive pressure inside the pipeline 6 and making it impossible to install the pipeline hydrostatic test plugging device normally. When conducting the pipeline hydrostatic test, the plug 12 is installed on the pressure relief hole 11 to form a sealed space between the plugging device and the inner wall 61 of the pipeline, ensuring the normal progress of the pipeline hydrostatic test. However, when removing the pipeline hydrostatic test plugging device, the plug 12 is opened to facilitate the discharge of the liquid after the pipeline hydrostatic test, and then the removal is carried out.
[0021] To save materials and facilitate acquisition, the rubber layer 2 is a rubber expansion ring, and the rubber expansion ring is arranged on the circumferences of the outer pressing plate 3 and the inner plugging plate 1, with the outer side of the rubber expansion ring arched. Using the rubber expansion ring as the rubber layer 2, since the rubber expansion ring is also circular, it can just be bonded between the circular outer pressing plate 3 and the inner plugging plate 1 without excessive waste. At the same time, with the outer side of the rubber expansion ring arched, when using the pipeline hydrostatic test plugging device, the outer side of the rubber expansion ring can be in close contact with the inner wall 61 of the pipeline, ensuring the tightness of the pipeline 6. It should be noted that when bonding the rubber expansion ring, the concentricity of the entire outer side of the rubber expansion ring needs to be ensured so that when the outer pressing plate 3 and the inner plugging plate 1 are tightened by the nut 42, they can be in close contact with the inner side of the pipeline 6.
Claims
1. A pipe static pressure test plugging device, characterized in that: The invention comprises an inner blocking plate (1), a rubber layer (2) and an outer pressure plate (3) which are arranged in sequence, wherein the centers of the inner blocking plate (1), the rubber layer (2) and the outer pressure plate (3) are located on the same horizontal line, the outer pressure plate (3) is in a circular shape, and the outer diameter of the outer pressure plate (3) is the same as the diameter of the inner blocking plate (1), the rubber layer (2) is adhered between the inner blocking plate (1) and the outer pressure plate (3), the diameter of the rubber layer (2) is larger than the diameter of the inner blocking plate (1) and is in contact with the inner wall (61) of the pipe, and a connecting piece (4) for connecting the outer pressure plate (3) and the inner blocking plate (1) is provided on the side of the inner blocking plate (1) away from the pipe (6), and the inner blocking plate (1), the rubber layer (2) and the inner wall (61) of the pipe form a closed space.
2. A pipeline static pressure test plugging device as claimed in claim 1, characterized in that: The connecting member (4) comprises a screw rod (41) and a nut (42); one end of the screw rod (41) is fixedly connected to the inner blocking plate (1), and the other end of the screw rod (41) passes through the rubber layer (2) and the outer pressure plate (3) in sequence and is threadedly connected to the nut (42).
3. A pipeline static pressure test plugging device as claimed in claim 2, characterized in that: The connecting pieces (4) are multiple and are evenly arranged on the inner blocking plate (1) along the circumference of the inner blocking plate (1).
4. A pipeline static pressure test plugging device as claimed in claim 1, characterized in that: A handle (5) is also provided on the side of the inner blocking plate (1) facing away from the pipeline (6).
5. A pipeline static pressure test plugging device as claimed in claim 4, characterized in that: There are two handles (5) which are symmetrically arranged on the inner blocking plate (1).
6. A pipeline static pressure test plug device as claimed in claim 1, characterized in that: A pressure relief hole (11) is provided at the center of the inner blocking plate (1), and a threaded plug (12) threadedly connected to the pressure relief hole (11) is provided on the pressure relief hole (11).
7. A pipeline static pressure test plug device as described in any one of claims 1 to 6, characterized in that: The rubber layer (2) is a rubber expansion ring, which is arranged on the circumference of the outer pressure plate (3) and the inner blocking plate (1), and the outer side of the rubber expansion ring is arched.