Water pressure testing device for GRP pipeline joint

Abstract

The invention relates to the field of GRP pipeline joint testing, in particular to a GRP pipeline joint water pressure testing device which comprises a frame body and an inflatable sealing ring. The inflatable sealing ring is arranged on the outer surface of the frame main body in a sleeving mode, an inflation pipe is installed on the inflatable sealing ring, the inflatable sealing ring is used for defining a first space at the joint of two adjacent pipelines to be subjected to pressure testing, and the inflatable sealing ring can seal the first space; the frame body is provided with a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe both extend into the first space. The testing device only needs to inject water into the first space at the joint through the water inlet pipe for testing, so that the water consumption is greatly reduced, and the overall construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of GRP pipe joint testing, and in particular to a GRP pipe joint water pressure testing device. Background Art

[0002] When building a factory along the coast, it is often necessary to lay GRP pipes (GRP pipes, also known as polyester GRP pipes) in water, underwater or onshore areas for drainage. The construction often involves the installation of thousands of GRP pipes, which is a huge project and has high requirements for pipe sealing.

[0003] At present, during the installation and construction of GRP pipes, the GRP pipes are generally tested for joint water pressure using the traditional method of filling the entire pipe with water and pressurizing it. The specific method is to first use blind plates and sealing rings to seal both ends of the test pipe section, then fill the GRP pipe with water, use a booster pump to pressurize the GRP pipe, and after confirming that there is no water leakage, drain the water and the test is completed. This traditional method consumes a large amount of fresh water, and the time for filling and draining the GRP pipe is long. The test operation steps are complicated and the test cost is high. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of low pressure testing efficiency and large amount of fresh water waste of the existing GRP pipe joint pressure testing device, and to provide a GRP pipe joint water pressure testing device.

[0005] In a first aspect, the present invention provides a GRP pipe joint water pressure testing device, comprising a frame body and an inflatable sealing ring; the inflatable sealing ring is sleeved on the outer surface of the frame body, the inflatable sealing ring is installed with an inflatable tube, the inflatable sealing ring is used to enclose a first space at the joint of two adjacent pipes to be pressure tested, and the inflatable sealing ring can seal the first space; the frame body is installed with an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe both extend into the first space.

[0006] The GRP pipe joint water pressure testing device provided by the present invention forms a first space at the joint of two adjacent pipes to be pressure tested by an inflatable sealing ring. The inflatable sealing ring can seal the first space after being inflated. It only needs to inject water into the first space at the joint through the water inlet pipe for testing, instead of the traditional method of sealing both ends of the entire pipe for testing, which greatly reduces water consumption, especially for countries with scarce fresh water, saves precious fresh water resources and reduces testing costs.

[0007] Moreover, the test device only needs to fill and drain the joints, and the pressure test steps are greatly simplified. After a joint test is completed, the test device can be directly moved to the next joint to be tested. There is no need to prepare a separate pressure test tool for each joint to be tested, which realizes the continuous pressure test of the entire GRP pipe. The time of the entire test process is greatly shortened, and more pipes can be tested in the same time, which improves the overall construction efficiency.

[0008] It is preferred to use an inflatable sealing ring to seal the first space. The inflatable sealing ring can expand according to the pipe diameter and the joint shape, and can adapt to pipes of different specifications. Compared with the traditional mechanical sealing method, the inflatable sealing ring can quickly achieve sealing by inflation, which greatly shortens the preparation time. In addition, the inflatable sealing ring is made of flexible material and will not easily scratch or damage the pipe surface like a hard sealing ring, so it has better protection performance for the pipe. The inflatable sealing ring can be directly replaced after being damaged, which reduces the long-term use cost. By adjusting the air pressure in the inflatable sealing ring, it can also adapt to different test pressure requirements, further improving the universality of the device.

[0009] Preferably, the inflatable sealing ring includes an integrally formed first inflatable sealing ring half, a second inflatable sealing ring half and an inflatable sealing ring connecting portion, the first inflatable sealing ring half and the second inflatable sealing ring half are connected via the inflatable sealing ring connecting portion, the first inflatable sealing ring half, the inflatable sealing ring connecting portion and the second inflatable sealing ring half are sequentially connected to form a first recess, and the first recess and the two adjacent pipes to be pressure tested together enclose the first space.

[0010] With this arrangement, the inflatable sealing ring forms an approximately "U"-shaped structure surrounding the joint, and the first and second inflatable sealing ring halves are respectively located on both sides of the joint, ensuring a better sealing effect; since the first inflatable sealing ring half, the second inflatable sealing ring half and the inflatable sealing ring connecting portion are an integrally formed structure, and the three are sequentially connected to form a first recess, compared with the method of separately arranging inflatable sealing rings on both sides of the joint, not only is the sealing performance better, but the first space enclosed by the first recess and the pipeline is more stable. During the pressure test, the pressure is evenly distributed on the inflatable sealing ring and the pipeline to be pressure tested, and it is not easy for the inflatable sealing ring to deform or shift due to excessive pressure, resulting in leakage, thereby improving the reliability and stability of the pressure test, allowing the inflatable sealing ring to adapt to a larger pressure test pressure, and improving the universality of the test device. In addition, this one-piece arrangement allows the entire inflatable sealing ring to be installed and disassembled as a whole, making the operation more convenient.

[0011] Preferably, the water inlet pipe and the water outlet pipe both pass through the inflatable sealing ring connecting portion and enter the first space.

[0012] Both the water inlet pipe and the water outlet pipe pass through the inflatable sealing ring connecting part to enter the first space. For example, a through hole for the pipe to pass through can be reserved in the inflatable sealing ring connecting part. The pipe passing through the through hole does not affect the air tightness of the inflatable sealing ring. The water inlet pipe and the water outlet pipe can conveniently fill and drain water in the first space.

[0013] Preferably, after the inflatable sealing ring is inflated, the height of the inflatable sealing ring connecting portion is smaller than the height of the first inflatable sealing ring half and the second inflatable sealing ring half, and the position of the inflatable sealing ring connecting portion corresponds to the joint.

[0014] With this arrangement, the position of the connecting part of the inflatable sealing ring corresponds to the joint, ensuring that the test area accurately covers the pipe joint and improving the accuracy of the test. The heights of the first inflatable sealing ring half and the second inflatable sealing ring half are greater, which means that a stronger sealing pressure is formed on both sides of the pipe, further improving the sealing performance of the inflatable sealing ring and preventing leakage due to excessive test pressure.

[0015] Preferably, two limiting convex rings are arranged on the outer surface of the frame body, and the inflatable sealing ring is located between the limiting convex rings.

[0016] With this arrangement, the two limiting protruding rings can ensure that the inflatable sealing ring is always in the correct position, reducing the possibility of deformation or displacement of the inflatable sealing ring during inflation, and preventing it from sliding or offsetting during use.

[0017] Preferably, the number of the inflatable sealing rings is two, and the two inflatable sealing rings are arranged on both sides of the joint. The two inflatable sealing rings, the outer surface of the frame body, and the two adjacent pipes to be pressure tested together enclose the first space.

[0018] The two inflatable sealing rings are arranged on both sides of the joint, that is, the inflatable sealing ring can adopt a common circular ring structure, which is easy to produce and reduce the production cost of the test device.

[0019] Preferably, the frame body includes a first frame half and a second frame half, the first frame half and the second frame half are both semicircular structures, and the first frame half and the second frame half are spliced ​​to form the frame body.

[0020] With this arrangement, the semicircular first and second frame halves can be produced and transported separately and then spliced ​​together, which facilitates the transportation of the test device. After the pressure measurement is completed, the two frame halves can be disassembled for easy storage.

[0021] Preferably, a wheel frame is installed on the frame body, and a wheel is installed on the wheel frame.

[0022] With this setup, the addition of wheels allows the entire test device to be easily moved, greatly improving its maneuverability within the pipeline to be pressure tested. It can help adjust the position of the test device more accurately, ensuring that it is correctly aligned with the pipeline joints, and helps to quickly move the test device from one test point to another, significantly reducing the time and labor consumption when testing multiple joints, and achieving continuous pressure testing of the entire section of GRP pipeline.

[0023] Preferably, the frame body is provided with a slide rail, and the wheel frame slides along the slide rail.

[0024] With this setting, the curvature of the slide rail can be set to be the same as that of the frame body. When the test device needs to be moved, the wheel frame can be moved along the slide rail to the bottom of the frame body. At this time, the wheel is in contact with the inner wall of the pipe to be pressure tested, which is convenient for movement. When a pressure test operation is required, the wheel frame can be moved along the slide rail to separate the wheel from the inner wall of the pipe, making it easier for the inflatable sealing ring to seal the first space.

[0025] Preferably, a support rod is further installed in the frame body, and both ends of the support rod are respectively connected to the inner wall of the frame body.

[0026] With this arrangement, under high pressure, the support rods can help the frame body maintain its original shape and prevent the frame body from deforming.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The GRP pipe joint water pressure test device provided by the present invention forms a first space at the joint of two adjacent pipes to be pressure tested through an inflatable sealing ring. The inflatable sealing ring can seal the first space after being inflated. It only needs to inject water into the first space at the joint through the water inlet pipe for testing, instead of the traditional method of sealing both ends of the entire pipe for testing, which greatly reduces water consumption, especially for countries with scarce fresh water, saves precious fresh water resources and reduces testing costs;

[0029] 2. The GRP pipe joint water pressure test device provided by the present invention only needs to fill and drain the joint, and the pressure test steps are greatly simplified. After the test of one joint is completed, the test device can be directly moved to the next joint to be tested. There is no need to prepare a separate pressure test tool for each joint to be tested, and continuous pressure testing of the entire GRP pipe is achieved. The time of the entire test process is greatly shortened, and more pipes can be tested in the same time, thereby improving the overall construction efficiency;

[0030] 3. The GRP pipe joint water pressure testing device provided by the present invention preferably uses an inflatable sealing ring to seal the first space. The inflatable sealing ring can be expanded according to the pipe diameter and the joint shape, and can adapt to pipes of different specifications. Compared with the traditional mechanical sealing method, the inflatable sealing ring can quickly achieve sealing by inflation, which greatly shortens the preparation time. In addition, the inflatable sealing ring is made of flexible material and will not easily scratch or damage the pipe surface like a hard sealing ring, so it has better protection performance for the pipe. The inflatable sealing ring can be directly replaced after being damaged, which reduces the long-term use cost. By adjusting the air pressure in the inflatable sealing ring, it can also adapt to different test pressure requirements, further improving the universality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a front view of the GRP pipe joint water pressure testing device.

[0032] Figure 2 This is a side view of the water pressure testing device for GRP pipe joints.

[0033] Figure 3 This is a schematic diagram of the front view of the frame body.

[0034] Figure 4 It is a side view of the inflatable sealing ring of the first embodiment.

[0035] Figure 5 This is a diagram of the GRP pipe joint water pressure testing device moving in the pipe to be tested.

[0036] Figure 6 This is the working status diagram of the GRP pipe joint water pressure testing device.

[0037] Figure 7 for Figure 4 A partial enlarged view of point A in the middle.

[0038] Figure 8 This is a partial enlarged view of the first space in Example 2.

[0039] Markings in the figure:

[0040] 1-frame body, 11-water inlet pipe, 12-water outlet pipe, 13-limiting convex ring, 14-first frame half, 15-second frame half, 16-support rod, 2-inflatable sealing ring, 21-inflatable pipe, 22-first inflatable sealing ring half, 23-second inflatable sealing ring half, 24-inflatable sealing ring connecting part, 3-pressure tester, 4-wheel frame, 41-wheel, 5-slide rail, 6-bolt, 7-hose, 8-sealing sleeve, 9-sealing ring, 100-pipeline to be pressure tested, 101-joint, 200-first space, 201-first recess. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0042] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the scheme of the present invention.

[0044] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0045] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0046] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0047] Example 1

[0048] like Figure 1 , Figure 2 As shown, this embodiment provides a GRP pipe joint water pressure testing device. When in use, the GRP pipe joint water pressure testing device is arranged inside the pipe to be pressure tested 100, and the pressure test is performed from the inside of the pipe to be pressure tested 100.

[0049] The GRP pipe joint water pressure testing device includes a frame body 1 and an inflatable sealing ring 2; the frame body 1 can be a circular structure with a smaller diameter than the pipe 100 to be pressure tested, the inflatable sealing ring 2 is sleeved on the outer surface of the frame body 1, the inflatable sealing ring 2 is installed with an inflatable tube 21, the inflatable sealing ring 2 can enclose a first space 200 at the joints 101 of two adjacent pipes 100 to be pressure tested, and the inflatable sealing ring 2 can seal the first space 200; the frame body 1 is installed with an inlet pipe 11 and an outlet pipe 12, and the inlet pipe 11 and the outlet pipe 12 both extend into the first space 200.

[0050] In this embodiment, the inflation tube 21 can be connected to an air pump, and the inflatable sealing ring 2 can be inflated by the air pump.

[0051] In this embodiment, the water inlet pipe 11 may be connected to a water pump, and water is injected into the first space 200 to pressurize the first space 200 through the water pump.

[0052] In this embodiment, the water outlet pipe 12 can be connected to a water tank. After the pressure test is completed, the switch of the water outlet pipe 12 is opened to drain the water in the first space 200.

[0053] Preferably, the air-filling pipe 21, the water inlet pipe 11, and the water outlet pipe 12 of the present embodiment are first connected to the pressure tester 3, and then the air-filling pipe 21 is connected to the air pump, the water inlet pipe 11 is connected to the water pump, and the water outlet pipe 12 is connected to the water tank. In this way, the opening and closing of the water inlet pipe 11, the water outlet pipe 12, and the air-filling pipe 21 can be controlled by the pressure tester 3, and the pressure tester 3 is used to detect the water pressure in the first space 200, and the pressure tester 3 can use a water pressure tester commonly used in industrial production.

[0054] The GRP pipe joint water pressure test device provided in this embodiment forms a first space 200 at the joint 101 of two adjacent pipes 100 to be pressure tested by means of an inflatable sealing ring 2. The inflatable sealing ring 2 can seal the first space 200 after being inflated. It is only necessary to inject water into the first space 200 at the joint 101 through the water inlet pipe 11 for pressure testing, rather than the traditional method of sealing both ends of the entire pipe for testing, which greatly reduces water consumption, especially for countries with scarce fresh water, saves precious fresh water resources, and reduces testing costs;

[0055] Moreover, the test device only needs to fill and drain the joint 101, and the pressure test steps are greatly simplified. After the test of a joint 101 is completed, the test device can be directly moved to the next joint 101 to be tested, and there is no need to prepare a separate pressure test tool for each joint 101 to be tested, thereby realizing continuous pressure testing of the entire GRP pipe. The time of the entire test process is greatly shortened, and more pipes can be tested in the same time, thereby improving the overall construction efficiency.

[0056] Preferably, an inflatable sealing ring 2 is used to seal the first space 200, and the first space 200 is located in the pipeline. The inflatable sealing ring 2 can be expanded according to the pipeline diameter and the shape of the joint 101, and can adapt to pipelines of different specifications. Compared with the traditional mechanical sealing method, the inflatable sealing ring 2 can quickly achieve sealing by inflation, which greatly shortens the preparation time. In addition, the inflatable sealing ring 2 is a flexible material and will not easily scratch or damage the pipeline surface like a hard sealing structure (such as installing a blind plate and a sealing ring), and has better protection performance for the pipeline; the inflatable sealing ring 2 can be directly replaced after being damaged, which reduces the long-term use cost. By adjusting the air pressure in the inflatable sealing ring 2, it can also adapt to different test pressure requirements, further improving the universality of the device.

[0057] Further, such as Figure 3 A schematic diagram of a possible frame body 1 is shown, the frame body 1 includes a first frame half 14 and a second frame half 15, both of which are semicircular structures, and the first frame half 14 and the second frame half 15 can be fixedly connected at the joint using bolts 6, and the two are spliced ​​to form the frame body 1. The semicircular first and second frame halves can be produced and transported separately, and then spliced, which is convenient for the transportation of the test device. After the pressure measurement is completed, the two frame halves can be disassembled for easy storage.

[0058] Further, such as Figure 1 , Figure 2As shown, a support rod 16 is also installed in the frame body 1. Specifically, the two ends of the support rod 16 can be welded to the inner wall of the frame body 1. For example, two parallel support rods 16 are installed in the first frame half 14, and two parallel support rods 16 are also installed in the second frame half 15. Under high pressure environment, the support rod 16 can help the frame body 1 maintain its original shape and prevent the frame body 1 from deformation.

[0059] Further, such as Figure 1 , Figure 3 As shown, the frame body 1 may also be provided with a slide rail 5, the curvature of the slide rail 5 may be the same as that of the frame body 1, and the specific position of the slide rail 5 may be provided at the lower part of the frame body 1, for example Figure 3 As shown in the second frame half 15, a wheel frame 4 can be installed in the slide rail 5. The extension direction of the wheel frame 4 can be the same as the extension direction of the axis of the frame body 1. Two wheel frames 4 can be provided, and two wheels 41 can be installed on each wheel frame 4. For example, Figure 2 As shown, the wheels 41 are located on the left and right sides of the frame body 1, and the wheel frame 4 can slide along the arc-shaped slide rail 5. When the wheel frame 4 needs to be fixed, the wheel frame 4 and the slide rail 5 can be fixed by bolts.

[0060] like Figure 5 As shown, the hollow arrow shows the moving direction of the test device. The addition of the wheel 41 allows the entire test device to be easily moved, greatly improving the maneuverability in the pipeline 100 to be pressure tested, and can help to more accurately adjust the position of the test device to ensure that it is correctly aligned with the pipeline joint 101, and help to quickly move the test device from one test point to another, significantly reducing the time and labor consumption when testing multiple joints 101, and realizing continuous pressure testing of the entire GRP pipeline; when the test device needs to be moved, the wheel frame 4 can be moved along the slide rail 5 to the bottom of the frame body 1, at this time, the wheel 41 is in contact with the inner wall of the pipeline 100 to be pressure tested for easy movement; when a pressure test operation is required, the wheel frame 4 can be moved along the slide rail 5 to separate the wheel 41 from the inner wall of the pipeline, so as to facilitate the inflatable sealing ring 2 to seal the first space 200.

[0061] Further, such as Figure 2 As shown, the outer surface of the frame body 1 for sleeve-mounting the inflatable sealing ring 2 is provided with two limiting convex rings 13, and the position of the limiting convex rings 13 can be specifically as follows: Figure 2 At the two ends of the outer surface of the frame body 1 shown, the inflatable sealing ring 2 is located between the limiting convex rings 13. The two limiting convex rings 13 are specifically annular structures, and the limiting convex rings 13 can be integrally formed or welded with the frame body 1. The two limiting convex rings 13 can ensure that the inflatable sealing ring 2 is always in the correct position, reducing the possibility of deformation or displacement of the inflatable sealing ring 2 during the inflation process, and preventing it from sliding or offsetting during use.

[0062] Further, such as Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 As shown, the structure of the inflatable sealing ring 2 is optimized. Specifically, the inflatable sealing ring 2 includes an integrally formed first inflatable sealing ring half 22, a second inflatable sealing ring half 23 and an inflatable sealing ring connecting portion 24. The first inflatable sealing ring half 22 and the second inflatable sealing ring half 23 are connected via the inflatable sealing ring connecting portion 24. The first inflatable sealing ring half 22, the inflatable sealing ring connecting portion 24 and the second inflatable sealing ring half 23 are sequentially connected to form a first recess 201. The first recess 201 and the two adjacent pipes 100 to be pressure tested together form a first space 200.

[0063] like Figure 7 As shown, before the pressure test, the joints 101 of the two pipelines 100 to be pressure tested are both located in the sealing sleeve 8, and a sealing ring 9 is arranged in the sealing sleeve 8. The sealing sleeve 8 and the sealing ring 9 seal the outside of the pipeline 100 to be pressure tested. When in use, the inflatable sealing ring 2 forms an approximately "U"-shaped structure around the joint 101, and the first and second inflatable sealing ring halves are respectively located on both sides of the joint 101, thereby ensuring a better sealing effect; since the first inflatable sealing ring half 22, the second inflatable sealing ring half 23 and the inflatable sealing ring connecting portion 24 are an integrally formed structure, and the three are sequentially connected to form the first recess 201, compared with the method of arranging the inflatable sealing ring 2 on both sides of the joint 101, not only is the sealing performance better, but the first space 200 enclosed by the first recess 201 and the pipeline is more stable. During the pressure test, the pressure is evenly distributed on the inflatable sealing ring 2 and the pipeline 100 to be pressure tested, and it is not easy for the inflatable sealing ring 2 to deform or shift due to excessive pressure, thereby causing leakage, thereby improving the reliability and stability of the pressure test, enabling the inflatable sealing ring 2 to adapt to a larger pressure test pressure, thereby improving the universality of the test device, and this integrally formed setting enables the entire inflatable sealing ring 2 to be installed and disassembled as a whole, making the operation more convenient.

[0064] Furthermore, the water inlet pipe 11 and the water outlet pipe 12 both pass through the inflatable sealing ring connecting portion 24 and enter the first space 200. Figure 7 As shown, after the inflatable sealing ring 2 is inflated, the first inflatable sealing ring half 22 and the second inflatable sealing ring half 23 expand and press against the inner wall of the pipe 100 to be pressure tested to seal the first space 200. The height of the inflatable sealing ring connecting portion 24 is smaller than the height of the first inflatable sealing ring half 22 and the second inflatable sealing ring half 23. The position of the inflatable sealing ring connecting portion 24 corresponds to the joint 101.

[0065] Both the water inlet pipe 11 and the water outlet pipe 12 pass through the inflatable sealing ring connecting part 24 to enter the first space 200. For example, a through hole for the pipe to pass through can be reserved in the inflatable sealing ring connecting part 24. The pipe passing through the through hole does not affect the air tightness of the inflatable sealing ring 2. The water inlet pipe 11 and the water outlet pipe 12 can conveniently fill and drain water in the first space 200. The position of the inflatable sealing ring connecting part 24 corresponds to the joint 101, ensuring that the test area accurately covers the pipe joint 101, improving the accuracy of the test, and the first inflatable sealing ring half 22 and the second inflatable sealing ring half 23 are higher than the inflatable sealing ring connecting part 24 after inflation (for example, during production, the material thickness of the inflatable sealing ring connecting part 24 can be made greater than the thickness of the first and second inflatable sealing ring halves. Thicker materials will limit the degree of expansion of the inflatable sealing ring connecting part 24, thereby maintaining a lower height after inflation; or materials with different elastic coefficients can be used. The inflatable sealing ring connecting part 24 uses rubber with a smaller elastic coefficient, for example, while the two inflatable sealing ring halves use rubber with a larger elastic coefficient. In this way, under the same pressure, the degree of expansion of the inflatable sealing ring connecting part 24 will be less than that of the two inflatable sealing ring halves), which means that a stronger sealing pressure is formed on both sides of the pipeline, further improving the sealing performance of the inflatable sealing ring 2, and preventing leakage caused by excessive test pressure.

[0066] Example 2

[0067] Different from Example 1, Figure 8 As shown, the inflatable sealing ring 2 of this embodiment can be a circular ring structure, and the number of inflatable sealing rings 2 is two, and the two inflatable sealing rings 2 are arranged on both sides of the joint 101. The two inflatable sealing rings 2, the outer surface of the frame body 1, and the two adjacent pipelines 100 to be tested for pressure jointly form a first space 200. The inflatable sealing ring 2 of this structural form is easy to produce and manufacture, and reduces the production cost of the test device.

[0068] Example 3

[0069] Based on Example 1, this example describes the method for using the GRP pipe joint water pressure testing device provided in Example 1.

[0070] like Figure 1-Figure 7 As shown, firstly, the bolt connection holes of the first frame half 14 and the second frame half 15 can be aligned, and the first frame half 14 and the second frame half 15 can be fixed together with bolts 6, flat washers, locking washers and nuts to form the frame body 1.

[0071] The position of the inflatable sealing ring 2 where the inflatable tube 21 is located can be painted red, and the corresponding hole on the frame body 1 through which the inflatable tube 21 passes can be painted red to facilitate alignment during installation. The water inlet pipe 11 is painted green, the water outlet pipe 12 is painted yellow, and the through holes on the inflatable sealing ring 2 through which the water inlet pipe 11 and the water outlet pipe 12 pass are also painted with corresponding colors for easy identification. Similarly, the positions on the frame body 1 for installing the water inlet pipe 11 and the water outlet pipe 12 are also painted with corresponding colors.

[0072] Lay the frame body 1 flat on the ground, align the holes marked with red, green and yellow on the inflatable sealing ring 2 with the through holes of corresponding colors on the frame body 1, apply some lubricant or soapy water solution on the inflatable sealing ring 2 and the frame body 1 to help the inflatable sealing ring 2 to be sleeved on the outer surface of the frame body 1 (since the inflatable sealing ring 2 needs to be tightly clamped on the frame body 1 to prevent the inflatable sealing ring 2 from slipping when pressed, auxiliary lubrication is required for installation). After the inflatable sealing ring 2 is sleeved, use Teflon tape to wrap each joint of the water inlet pipe 11, the water outlet pipe 12 and the inflation pipe 21, and install the water inlet pipe 11, the water outlet pipe 12 and the inflation pipe 21 in the corresponding positions, for example, they can be connected by threads.

[0073] Then the wheel frame 4 can be installed on the slide rail 5, and the water inlet pipe 11, the water outlet pipe 12 and the air charging pipe 21 can be connected to the corresponding joints on the pressure tester 3 using the hose 7, and the air charging and discharging, water inlet and water discharge can be controlled by the corresponding switches of the pressure tester 3. The pressure tester 3 can display the pressure gauge reading, flow meter reading, air charging volume reading, time reading, etc.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A GRP pipe joint water pressure testing device, characterized in that: It comprises a frame body (1) and an inflatable sealing ring (2); The inflatable sealing ring (2) is sleeved on the outer surface of the frame body (1), the inflatable sealing ring (2) is installed with an inflatable tube (21), the inflatable sealing ring (2) is used to enclose a first space (200) at the joint (101) of two adjacent pipes (100) to be pressure tested, and the inflatable sealing ring (2) can seal the first space (200); The frame body (1) is provided with a water inlet pipe (11) and a water outlet pipe (12), and both the water inlet pipe (11) and the water outlet pipe (12) extend into the first space (200).

2. A GRP pipe joint water pressure testing device according to claim 1, characterized in that: The inflatable sealing ring (2) comprises an integrally formed first inflatable sealing ring half (22), a second inflatable sealing ring half (23) and an inflatable sealing ring connecting portion (24); the first inflatable sealing ring half (22) and the second inflatable sealing ring half (23) are connected via the inflatable sealing ring connecting portion (24); the first inflatable sealing ring half (22), the inflatable sealing ring connecting portion (24) and the second inflatable sealing ring half (23) are sequentially connected to form a first recess (201); the first recess (201) and the two adjacent pipes to be pressure tested (100) together enclose the first space (200).

3. A GRP pipe joint water pressure testing device according to claim 3, characterized in that: The water inlet pipe (11) and the water outlet pipe (12) both pass through the inflatable sealing ring connecting portion (24) and enter the first space (200).

4. A GRP pipe joint water pressure testing device according to claim 3, characterized in that: After the inflatable sealing ring (2) is inflated, the height of the inflatable sealing ring connecting portion (24) is smaller than the height of the first inflatable sealing ring half (22) and the second inflatable sealing ring half (23), and the position of the inflatable sealing ring connecting portion (24) corresponds to the joint (101).

5. A GRP pipe joint water pressure testing device according to claim 2, characterized in that: Two limiting convex rings (13) are arranged on the outer surface of the frame body (1), and the inflatable sealing ring (2) is located between the limiting convex rings (13).

6. A GRP pipe joint water pressure testing device according to claim 1, characterized in that: The number of the inflatable sealing rings (2) is two, and the two inflatable sealing rings (2) are arranged on both sides of the joint (101). The two inflatable sealing rings (2), the outer surface of the frame body (1), and the two adjacent pipes (100) to be pressure tested together enclose the first space (200).

7. A GRP pipe joint water pressure testing device according to claim 1, characterized in that: The frame body (1) comprises a first frame half (14) and a second frame half (15); the first frame half (14) and the second frame half (15) are both semicircular structures; the first frame half (14) and the second frame half (15) are spliced ​​together to form the frame body (1).

8. A GRP pipe joint water pressure testing device according to claim 1, characterized in that: The frame body (1) is provided with a wheel frame (4), and a wheel (41) is provided on the wheel frame (4).

9. A GRP pipe joint water pressure testing device according to claim 8, characterized in that: The frame body (1) is provided with a slide rail (5), and the wheel frame (4) slides along the slide rail (5).

10. A GRP pipe joint water pressure testing device according to claim 1, characterized in that: A support rod (16) is also installed in the frame body (1), and two ends of the support rod (16) are respectively connected to the inner wall of the frame body (1).

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