A pipe body pressure testing system

Abstract

This utility model discloses a pipe pressure bearing test system, belonging to the field of pipe performance testing technology. It includes a sealing component, a negative pressure suction component, and a testing component. The sealing component is disposed on both sides of the pipe to be tested to seal the ends of the pipe, forming a sealed space. The negative pressure suction component includes a suction pipe connected to the sealing component, which can suction air from the sealed space. The testing component includes an inflatable annular airbag and a detection unit. The annular airbag is fitted around the middle of the pipe to be tested, and the detection unit can detect the pressure change of the pipe relative to the annular airbag during deformation. This utility model can accurately sense the deformation of the pipe to be tested and test its negative pressure bearing capacity.

Description

Technical Field

[0001] This utility model relates to the field of pipe performance testing technology, and in particular to a pipe pressure testing system. Background Technology

[0002] PPR (Polypropylene-Random) pipe, also known as Type III polypropylene pipe or random copolymer polypropylene pipe, has the advantages of energy saving and material saving, environmental protection, lightweight and high strength, corrosion resistance, smooth inner wall without scaling, simple construction and maintenance, and long service life. It is widely used in building water supply and drainage, urban and rural water supply and drainage, urban gas, power and optical cable sheathing, industrial fluid transportation, agricultural irrigation and other construction, municipal, industrial and agricultural fields.

[0003] When PPR is used in drainage and irrigation processes, it needs to withstand negative pressure to draw water from the end of the pipe. PPR may deform or even crack under negative pressure. Current technology lacks a method to quantitatively detect the deformation of PPR under negative pressure, thus failing to ensure the quality of PPR leaving the factory. Utility Model Content

[0004] In view of this, it is necessary to provide a pipe pressure testing system to solve the problem that existing PPRs are unable to detect their deformation under negative pressure.

[0005] This utility model provides a pipe pressure testing system, including:

[0006] A sealing assembly is provided on both sides of the tube body to be tested, so as to seal the ends of the tube body to be tested and form a sealed space;

[0007] A negative pressure suction assembly, the negative pressure suction assembly including a suction tube communicating with the sealing assembly, the suction tube being capable of suctioning air from the sealed space;

[0008] The test assembly includes an inflatable annular airbag and a detection unit. The annular airbag is fitted over the middle of the tube to be tested, and the detection unit is capable of detecting the pressure change of the tube to be tested relative to the annular airbag when it deforms.

[0009] Furthermore, the annular airbag includes an outer casing and an inflatable bladder, the bladder being disposed inside the outer casing, the outer casing being fitted onto the tube to be tested, and the bladder being able to fill the gap between the outer casing and the tube to be tested.

[0010] Furthermore, the capsule includes multiple capsule flaps, which are equidistantly arranged around the central axis of the outer sheath and integrally connected to the capsule.

[0011] Furthermore, the detection unit includes an air supply tube for delivering air and a pressure gauge. The air supply tube is connected to the bladder via the outer casing, and the pressure gauge is mounted on the air supply tube to measure the air pressure inside the bladder.

[0012] Furthermore, the test assembly also includes an inflation / deflation unit, which is connected to the other end of the gas delivery pipe. The inflation / deflation unit is capable of inflating, deflating, and maintaining the gas pressure relative to the capsule.

[0013] Furthermore, it also includes a support frame, which is connected to the two sealing components respectively, and the two sealing components are arranged horizontally relative to each other.

[0014] Furthermore, the sealing assembly includes an annular clamp, a sealing plug, and fastening units. The sealing plug has an end cap and a cylindrical body. The cylindrical body is inserted into the tube to be tested. The end cap is connected to one end of the cylindrical body for sealing against the end of the cylindrical body. The annular clamp is sleeved on the cylindrical body, and a clamping space is formed between the annular clamp and the cylindrical body for clamping the tube to be tested. Multiple fastening units are arranged along the axial direction of the tube to be tested. The end cap is connected to the annular clamp through the fastening units to enhance the seal between the end cap and the tube to be tested.

[0015] Furthermore, the fastening unit includes a first connecting hole, a second connecting hole, and a first screw connector. The first connecting hole is formed on the annular clamp, the second connecting hole is formed on the end cap, and the first screw connector passes through the first connecting hole and the second connecting hole to tighten the end cap from the axial direction of the pipe.

[0016] Furthermore, the annular clamp includes two half clamps and a second screw connector. The two half clamps are arranged opposite each other to form a clamping space for the pipe. The ends of the two half clamps are respectively connected by the second screw connector to adjust the clamping degree between the two half clamps.

[0017] Furthermore, the cylinder is provided with an annular support inside, the annular support is fixedly connected to the cylinder and is positioned relative to the annular clamp, the annular support can prevent the deformation of the cylinder.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This utility model discloses a pipe pressure testing system, which includes a testing assembly comprising an inflatable annular airbag and a detection unit. The annular airbag is fitted around the middle of the pipe to be tested. The middle of the pipe is relatively far from the sealing assembly, thus experiencing minimal external forces and the greatest stress and deformation. When the pipe deforms relative to the annular airbag, the airbag expands or contracts due to changes in external pressure, thereby altering its own gas pressure. The detection unit can detect these pressure changes in the annular airbag, monitoring the pipe's deformation in real time. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connection structure of the tube body to be tested, the sealing assembly, and the testing assembly in this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the annular airbag in this utility model;

[0024] Figure 4 This is a schematic diagram of the detection unit in this utility model;

[0025] Figure 5 This is a schematic diagram of the sealing component and the tube body to be tested in this utility model;

[0026] Figure 6 This is a schematic diagram of the sealing and plugging structure in this utility model.

[0027] In the diagram, 100 is the sealing assembly; 110 is the annular clamp; 111 is the half clamp; 112 is the second screw connector; 120 is the sealing plug; 121 is the end cap; 122 is the cylinder; 122a is the annular support; 130 is the fastening unit; 131 is the first screw connector; 200 is the negative pressure suction assembly; 210 is the suction tube; 300 is the testing assembly; 310 is the annular airbag; 311 is the outer casing; 312 is the airbag body; 312a is the airbag flap; 320 is the detection unit; 321 is the gas delivery tube; 322 is the pressure gauge; 330 is the inflation / deflation unit; 400 is the support frame; and 500 is the tube to be tested. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0029] This embodiment of a pipe pressure bearing test system relates to the field of pipe performance testing technology. By setting an annular airbag 310 in the middle of the pipe body 500 to be tested, the annular airbag 310 can accurately sense the deformation of the pipe body 500 to be tested by utilizing air pressure changes, and test the negative pressure bearing capacity of the pipe body 500 to be tested.

[0030] Please see Figures 1 to 6 This embodiment of a pipe pressure testing system includes a sealing assembly 100, a negative pressure suction assembly 200, and a testing assembly 300. The sealing assembly 100 is disposed on both sides of the pipe 500 to be tested. The sealing assembly 100 can seal both ends of the pipe 500, forming a sealed space inside the pipe 500 to prevent pressure leakage. The negative pressure suction assembly 200 includes a suction pipe 210, which communicates with the sealing assembly 100. The suction pipe 210 can pass through the sealing assembly 100 and communicate with the sealed space inside the pipe 500 to suction air from the sealed space, simulating negative pressure conditions in a real working environment, allowing the pipe to be subjected to stress and deformation under a certain negative pressure.

[0031] The test assembly 300 includes an inflatable annular airbag 310 and a detection unit 320. The annular airbag 310 is fitted around the middle of the tube body 500 under test. The middle of the tube body 500 is relatively far from the sealing assembly 100, and is therefore least affected by external forces, but is most susceptible to stress and deformation. When the tube body 500 deforms relative to the annular airbag 310, the annular airbag 310 expands or contracts due to changes in external pressure, thereby changing its own gas pressure. The detection unit 320 can detect the pressure changes of the annular airbag 310 and monitor the deformation of the tube body in real time.

[0032] During use, the annular airbag 310 is fitted onto the middle of the tube body 500 to be tested. The annular airbag 310 is relatively inflated and presses firmly against the tube body 500. The detection unit 320 monitors the pressure of the annular airbag 310 in real time. By drawing air from the tube body 500 through the suction tube 210, a negative pressure is created, causing the tube body 500 to deform relatively. The annular airbag 310 is then released, and the detection unit 320 can detect the pressure change.

[0033] It should be noted that the negative pressure suction assembly 200 also includes a vacuum pump, which is connected to the inside of the tube body 500 under test through the suction pipe 210 to draw in the air inside the tube body 500 under test and form a negative pressure.

[0034] In some embodiments, please refer to Figure 2 and Figure 3 The annular airbag 310 includes an outer sleeve 311 and an inflatable bladder 312. The bladder 312 is disposed inside the outer sleeve 311, which is fitted onto the tube 500 to be tested. The bladder 312 can fill the gap between the outer sleeve 311 and the tube 500. Under negative pressure, the bladder 312 expands or contracts under the constraint of the outer sleeve 311. When the pipeline is subjected to negative pressure, the pipeline may undergo local deformation (such as shrinkage, denting, etc.), and the degree of expansion of the bladder 312 is directly related to the amount of deformation. Therefore, the expansion state of the airbag can reflect the deformation of the pipeline.

[0035] The filling space of the air bladder 312 within the outer casing 311 changes as negative pressure suction proceeds, and this change can be detected by a pressure sensor. Since the air bladder 312 experiences different pressure changes during expansion or contraction, the detection unit 320 can accurately measure the pressure inside the air bladder, thereby determining the degree of pipe deformation under negative pressure. The inflation and deflation process of the air bladder is closely related to the pipe deformation response, providing accurate quantitative data for pipe quality assessment.

[0036] Furthermore, in practical applications, pipe sizes and structures may vary, and the adjustability and adaptability of the airbag allow it to accommodate pipes of different sizes and types. The structure of the outer jacket 311 and the airbag body 312 enables the airbag to uniformly adapt to the shape of the pipe, ensuring accurate testing for different pipe types and sizes.

[0037] In some embodiments, please refer to Figure 3 The air bladder body 312 includes multiple air bladder flaps 312a, which are equidistantly arranged around the central axis of the outer sleeve 311 and integrally connected to the air bladder body 312. The multiple air bladder flaps 312a enable the air bladder to expand evenly during inflation, avoiding excessive expansion or uneven pressure in local areas. Each air bladder flap 312a serves as an independent unit of the air bladder. When the air bladder is inflated, the multiple air bladder flaps 312a expand together, ensuring that the pressure is evenly distributed inside the air bladder, thereby making the transmission of negative pressure smoother.

[0038] Multiple flaps 312a enhance the flexibility of the airbag during inflation. Each flap 312a can inflate independently, allowing the entire airbag to better adapt to different pipe shapes and surface conditions. When there are minor irregularities on the pipe surface, multiple flaps 312a can more flexibly adapt to these changes, ensuring more uniform contact between the airbag and the pipe and avoiding uneven pressure distribution caused by surface roughness.

[0039] In some embodiments, the detection unit 320 includes an air supply pipe 321 capable of supplying air and a pressure gauge 322. The air supply pipe 321 is connected to the bladder 312 via an outer sleeve 311, and the pressure gauge 322 is disposed on the air supply pipe 321.

[0040] The barometer 322 can monitor the pressure changes inside the airbag in real time. The expansion and contraction of the airbag are directly affected by its internal pressure, and the barometer 322 can accurately record the pressure changes of the airbag. The pressure changes directly reflect the degree of deformation of the tube under negative pressure.

[0041] In practical implementation, the barometer 322, as a measuring tool, can indirectly reflect the deformation of the tube 500 under test based on changes in the air pressure inside the air bladder. Under negative pressure, if the tube deforms, the air bladder will expand or contract, and the air pressure inside the air bladder will change accordingly. The barometer 322 can accurately record this change and convert it into a specific numerical value, which facilitates the quantification of the deformation of the tube.

[0042] In some embodiments, please refer to Figure 4 The test assembly 300 also includes an inflation / deflation unit 330, which is connected to the other end of the gas supply pipe 321. The inflation / deflation unit 330 can precisely control the inflation and deflation process of the airbag, thereby adjusting the expansion state of the airbag 312. By precisely controlling the internal air pressure of the airbag, the inflation / deflation unit 330 can effectively simulate different negative pressure environments, ensuring accurate measurements of the pipeline during negative pressure testing. This unit can adjust the air pressure through inflation and deflation according to test requirements, avoiding the problem of the airbag inflating too quickly or too slowly.

[0043] In practical implementation, the inflation / deflation unit 330 includes a housing and an electric inflation pump. The electric inflation pump is located inside the housing, and the other end of the air supply pipe 321 enters the housing, connecting sequentially to the pressure gauge 322 and then to the electric inflation pump. The electric inflation pump can automatically supply gas into the air supply pipe 321 to maintain a certain pressure. When needed, the electric inflation pump can deflate in reverse, controlling the retraction of the annular airbag 310.

[0044] In some embodiments, please refer to Figure 1 A pipe pressure testing system also includes a support frame 400, which is connected to two sealing components 100 respectively. The support frame 400 horizontally supports and aligns the sealing components 100 on both sides. The horizontally arranged sealing components 100 can provide a uniform and consistent sealing effect, avoiding the impact of pressure applied due to tilting or asymmetry on the test results, thereby improving the accuracy of the testing system.

[0045] The support frame 400 enhances the structural stability of the sealing assembly 100 by fixing the sealing assembly 100 in a relatively horizontal position, and reduces the risk of displacement or failure of the sealing assembly 100 due to external forces.

[0046] In some embodiments, please refer to Figure 2 , Figure 5 as well as Figure 6 The sealing assembly 100 includes an annular clamp 110, a sealing plug 120, and a fastening unit 130. The sealing plug 120 has an end cap 121 and a cylindrical body 122. The cylindrical body 122 is inserted into the pipe, and the outer circumferential surface of the cylindrical body 122 abuts against the inner wall of the pipe to form a first sealing structure. The end cap 121 is connected to one end of the cylindrical body 122, and the end of the end cap 121 abuts against the end of the pipe to form a second sealing structure. The first sealing structure and the second sealing structure cooperate with each other to enhance the seal between the pipe and the sealing plug 120, improve the sealing performance, and increase the accuracy of the test.

[0047] An annular clamp 110 is fitted onto the cylinder 122, forming a clamping space between the annular clamp 110 and the cylinder 122 for clamping the pipe. The annular clamp 110 clamps the pipe from the outside in, while the cylinder 122 supports the pipe body 500 to be tested from the inside out. The cooperation between the annular clamp 110 and the cylinder 122 can compress the gap between the cylinder 122 and the pipe body 500 to be tested, enhancing the sealing performance of the first sealing structure. Multiple fastening units 130 are arranged along the axial direction of the pipe body 500 to be tested. The end cap 121 is connected to the annular clamp 110 through the fastening units 130. The multiple fastening units 130 act simultaneously on the end cap 121, causing the end cap 121 to move relative to the annular clamp 110, so that the end cap 121 presses against the end of the pipe, enhancing the sealing performance of the second sealing structure. The ring clamp 110 and fastening unit 130 can further strengthen the seal between the plug 120 and the tube body 500 under test, prevent air leakage, and improve the accuracy of the test.

[0048] It should be noted that the top of the support frame 400 has an arc-shaped slot, and the bottom of the end cap 121 can be snapped into the arc-shaped slot. The arc-shaped slot can position the end cap 121. The support frame 400 can support the weight of the tube body 500 to be tested and the sealing assembly 100.

[0049] Based on the fixed-length sampling of the tube body 500 under test, the distance between the two end caps 121 can always remain unchanged and close to the length of the tube body 500 under test, thereby maintaining the fit between the support frame 400 and the end caps 121.

[0050] In some embodiments, the fastening unit 130 includes a first connecting hole, a second connecting hole, and a first screw connector 131. The first screw connector 131 is specifically a bolt and nut. The first connecting hole is opened on the annular clamp 110, and the second connecting hole is opened on the end cap 121. The bolt passes through the first connecting hole and the second connecting hole in sequence and is connected to the nut. The head of the bolt and the nut abut against the annular clamp 110 and the end cap 121 respectively, which can pull the end cap 121 to move relative to the annular clamp 110. The annular clamp 110 is stationary relative to the tube body 500 to be tested, and the end cap 121 presses against the end of the tube body 500 to be tested, forming a compression on the tube body 500 to be tested, further improving the sealing performance of the first sealing structure.

[0051] The annular clamp 110 includes two halves 111 and a second screw connector 112. The two halves 111 are arranged opposite each other to form a clamping space for the tube body 500 to be tested. The ends of the two halves 111 are connected by the second screw connector 112. The design of the two halves 111 allows the annular clamp 110 to adapt to tube bodies 500 with different diameters and wall thicknesses, improving the versatility of the device. By adjusting the second screw connector 112, the clamping degree between the two halves 111 can be flexibly adjusted to ensure close contact and good sealing with the tube body 500 to be tested.

[0052] In the specific implementation process, the end of the half hoop 111 extends radially relative to the pipe body to form a docking part. A third connecting hole is opened on the docking part. The second screw connector 112 is specifically a bolt and nut. The bolt passes through the two second connecting holes in sequence and connects with the nut. The head of the bolt and the nut abut against the two half hoops 111 respectively, which can provide a uniform clamping force, making the clamping of the two half hoops 111 on the pipe body 500 to be tested more stable.

[0053] The cylinder 122 has an annular support 122a inside. The annular support 122a is fixedly connected to the cylinder 122 and is positioned relative to the annular clamp 110. The annular support 122a provides additional support to prevent the cylinder 122 from deforming during pressurization. With the support of the annular support 122a, the cylinder 122 can maintain its original shape, ensuring the accuracy of the internal pressure test.

[0054] Workflow: First, remove the fastening unit 130 and annular clamp 110 from the sealing assembly 100. Then, place the annular airbag 310 onto the tube body 500 to be tested, and insert two sealing plugs into both ends of the tube body 500. Next, use the annular clamp 110 and fastening unit 130 to complete a double seal between the tube body 500 and the plugs, and insert the end cap 121 into the arc-shaped groove at the top of the support frame 400. Finally, sequentially start the inflation / deflation unit 330 and the vacuum pump to inflate the annular airbag 310, ensuring that the inner side of the annular airbag 310 presses firmly against the tube body 500 to be tested, and the pressure gauge 322 maintains a constant pressure. The vacuum pump is then used to evacuate the inner cavity of the tube body 500 to be tested, and the deformation of the tube body 500 is assessed by observing the pressure change on the pressure gauge 322.

[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A pipe body pressure test system, characterized by ,include: A sealing assembly is provided on both sides of the tube body to be tested, so as to seal the ends of the tube body to be tested and form a sealed space; A negative pressure suction assembly, the negative pressure suction assembly including a suction tube communicating with the sealing assembly, the suction tube being capable of suctioning air from the sealed space; The test assembly includes an inflatable annular airbag and a detection unit. The annular airbag is fitted over the middle of the tube to be tested, and the detection unit is capable of detecting the pressure change of the tube to be tested relative to the annular airbag when it deforms.

2. The pipe pressure testing system according to claim 1, characterized in that, The annular airbag includes an outer shell and an inflatable bladder. The bladder is disposed inside the outer shell. The outer shell is fitted onto the tube to be tested. The bladder is capable of filling the gap between the outer shell and the tube to be tested.

3. The pipe pressure testing system according to claim 2, characterized in that, The capsule includes multiple capsule flaps, which are equidistantly arranged around the central axis of the outer sheath and integrally connected to the capsule.

4. The pipe pressure testing system according to claim 2, characterized in that, The detection unit includes an air supply tube for delivering air and a pressure gauge. The air supply tube is connected to the bladder via the outer casing, and the pressure gauge is mounted on the air supply tube to measure the air pressure inside the bladder.

5. The pipe pressure testing system according to claim 4, characterized in that, The test assembly also includes an inflation / deflation unit, which is connected to the other end of the gas delivery pipe. The inflation / deflation unit is capable of inflating, deflating, and maintaining the gas pressure relative to the capsule.

6. The pipe pressure testing system according to claim 1, characterized in that, It also includes a support frame, which is connected to the two sealing components respectively, and the two sealing components are arranged horizontally relative to each other.

7. The pipe pressure testing system according to claim 1, characterized in that, The sealing assembly includes an annular clamp, a sealing plug, and fastening units. The sealing plug has an end cap and a cylindrical body. The cylindrical body is inserted into the tube to be tested. The end cap is connected to one end of the cylindrical body for sealing against the end of the cylindrical body. The annular clamp is sleeved on the cylindrical body, and a clamping space is formed between the annular clamp and the cylindrical body for clamping the tube to be tested. Multiple fastening units are arranged along the axial direction of the tube to be tested. The end cap is connected to the annular clamp through the fastening units to enhance the seal between the end cap and the tube to be tested.

8. The pipe pressure testing system according to claim 7, characterized in that, The fastening unit includes a first connecting hole, a second connecting hole, and a first screw connector. The first connecting hole is formed on the annular clamp, the second connecting hole is formed on the end cap, and the first screw connector passes through the first connecting hole and the second connecting hole to tighten the end cap from the axial direction of the pipe.

9. A pipe pressure testing system according to claim 7, characterized in that, The annular clamp includes two half clamps and a second screw connector. The two half clamps are arranged opposite each other to form a clamping space for the pipe. The ends of the two half clamps are respectively connected by the second screw connector to adjust the clamping degree between the two half clamps.

10. A pipe pressure testing system according to claim 8, characterized in that, The cylinder has an annular support inside, which is fixedly connected to the cylinder and positioned relative to the annular clamp. The annular support can prevent the deformation of the cylinder.

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