Fixing device, performance testing system of reinforced pipe and performance testing method

Abstract

The application provides a fixing device, a performance test system and a performance test method of a reinforced pipe, and relates to the technical field of performance test of the reinforced pipe. The fixing device is used for fixing the reinforced pipe and comprises a loading piece, two clamping pieces and a fixing piece. The loading piece has a first side for connecting a load and a second side opposite to the first side. The two clamping pieces are connected to the loading piece and located at the second side of the loading piece, and the two clamping pieces are configured to clamp the reinforcing rib. The side of the two clamping pieces away from the loading piece is configured to abut against the outer circumferential surface of the pipe. The fixing piece is connected to the loading piece and located at the second side of the loading piece, and the fixing piece is configured to abut against the surface of the reinforcing rib away from the pipe. The fixing device fixes the reinforcing rib of the reinforced pipe in three directions, so that stress concentration at the reinforcing rib can be avoided to a certain extent. Meanwhile, the fixing device fixes the pipe in two directions, so that the fixing effect of the reinforced pipe is better, and the test result is more accurate.

Description

Technical Field

[0001] This application relates to the field of performance testing technology for reinforced pipes, and more specifically, to a fixing device, a performance testing system for reinforced pipes, and a performance testing method. Background Technology

[0002] Fiberglass is a type of reinforced plastic made by combining glass fiber and its products as reinforcing materials with thermosetting resin as the matrix material. Pipes made from this material are called fiberglass pipes. To improve the deformation resistance of fiberglass pipes, reinforcing ribs are usually spaced along the outer surface (the combination of the fiberglass pipe and the reinforcing ribs forms a reinforced pipe). The reinforcing ribs are ring-shaped rib structures integrally formed with the fiberglass pipe, and their cross-sectional shape can be circular, elliptical, rectangular, or trapezoidal, etc.

[0003] There are many international standards for fiberglass pipes, such as AWWA C950, ISO 23856, and ASTM D2996. However, none of these standards cover the relevant regulations and requirements for reinforced pipes, so they cannot be directly used as standards for reinforced pipes.

[0004] Domestic standards, such as GB / T 21238, GB 51160, and JC / T 552, do not define the concept of reinforced pipes, and therefore lack testing methods for them. Just like other pipe materials, each type has its own specific standards. Reinforced pipes have traditionally been treated as a type of pure fiberglass pipe and have adopted the standards for pure fiberglass pipes. However, this leads to significant discrepancies with the actual standards for reinforced pipes.

[0005] Because reinforced tubes contain reinforcing ribs, if the stiffness of reinforced tubes is tested using a traditional device for testing smooth-walled tubes, it will cause slippage between the testing device and the reinforcing ribs, resulting in a large deviation in the test results. At the same time, due to the special shape of the reinforcing ribs, local stress concentration may occur, which may damage the reinforcing ribs and also cause deviation in the test results. Summary of the Invention

[0006] The purpose of this application is to provide a fixing device, a performance testing system for reinforced pipes, and a performance testing method to effectively fix the reinforced pipes, thereby making the performance test results of the reinforced pipes more accurate.

[0007] In a first aspect, embodiments of this application provide a fixing device for fixing a reinforced pipe. The reinforced pipe includes a pipe and reinforcing ribs disposed on the outer surface of the pipe. The fixing device includes a loading member, two clamping members, and a fixing member. The loading member has a first side for connecting a load and a second side opposite to the first side. The two clamping members are connected to the loading member and located on the second side of the loading member, and are configured to clamp the reinforcing ribs; the sides of the two clamping members facing away from the loading member are configured to abut against the outer peripheral surface of the pipe. The fixing member is connected to the loading member and located on the second side of the loading member, and is configured to abut against the surface of the reinforcing ribs facing away from the pipe.

[0008] In the above technical solution, the reinforcing ribs of the reinforced pipe are positioned between two clamping members to fix both sides of the reinforcing ribs. The ends of the reinforcing ribs facing away from the pipe are fixed using fasteners, while one side of the pipe is fixed using clamping members. This secures the reinforced pipe between the bearing surface and the fixing device, resulting in better fixation. When a load is applied to the first side of the loading member, the entire reinforced pipe can be subjected to force through the fixing device to test its performance. Furthermore, because the reinforcing ribs are fixed in three directions, stress concentration at the reinforcing ribs can be avoided to some extent; and the pipe is fixed in two directions, resulting in better fixation and more accurate test results.

[0009] In one possible implementation, each clamping member includes a clamping plate and an abutment plate fixedly connected together, the clamping plate being connected to the loading member, and the two clamping plates being configured to clamp reinforcing ribs; the side of the two abutment plates facing away from the loading member is configured to abut against the outer circumferential surface of the pipe.

[0010] In the above technical solution, fixing the reinforcing ribs and pipes with a plate-like structure can improve the fixing effect of the reinforcing pipe, so as to test its performance.

[0011] In one possible implementation, the loading element is a loading plate, and each clamping element also includes a connecting plate connected to the end of the clamping plate away from the abutment plate, and the connecting plate is connected to the loading plate.

[0012] In the above technical solution, the force is transmitted to the plate-shaped clamping and fixing parts through the plate structure, which can better transmit the force to the stiffened tube, and the force is more evenly distributed, which can further improve the problem of local stress concentration.

[0013] In one possible implementation, the two connecting plates can reciprocate relative to the loading plate to adjust the distance between the two clamping plates.

[0014] In the above technical solution, the distance between the two clamping plates is adjustable, which can meet the fixing of reinforcing ribs of different thicknesses and has a wider range of applications.

[0015] In one possible implementation, the loading plate is provided with a strip hole, the fixing rod passes through the strip hole and connects to the connecting plate, and the fixing rod can move back and forth in the strip hole to adjust the distance between the two clamping plates.

[0016] In the above technical solution, the distance between the two clamping plates is adjusted by the reciprocating movement of the fixing rod in the strip hole, which is relatively convenient and the structure is relatively simple.

[0017] In one possible implementation, the fastener is positioned between two clamping plates and is connected to the loading plate.

[0018] In the above technical solution, the force on the loading plate can be better transmitted to the fixing member, and the fixing member is located between the two clamping plates and connected to the loading plate and abutting against the reinforcing rib, so that the fixing effect of the reinforcing tube can be better and the force on the loading plate can be better transmitted.

[0019] In one possible implementation, the loading plate abuts against the connecting plate, and the fixing member is threadedly connected to the loading plate via a connecting rod to adjust the distance between the fixing member and the loading plate.

[0020] In the above technical solution, if the reinforcing rib is wide (the reinforcing rib protrudes high from the pipe), the distance between the fixing component and the loading plate can be shortened by rotating the connecting rod, and the distance between the fixing component and the outer circumference of the pipe can be increased, so as to fix the wider reinforcing rib. If the reinforcing rib is narrow (the reinforcing rib protrudes low from the pipe), the distance between the fixing component and the loading plate can be increased by rotating the connecting rod, and the distance between the fixing component and the outer circumference of the pipe can be decreased, so as to fix the narrower reinforcing rib.

[0021] In one possible implementation, the connecting plate, clamping plate, and abutment plate are combined to form a U-shaped plate, with the U-shaped openings of the two U-shaped plates facing away from each other.

[0022] In the above technical solution, the clamping component is a U-shaped plate. One side of the U-shaped plate (connecting plate) is connected to the loading plate to transfer the load provided by the loading plate. The other side of the U-shaped plate (abutting plate) is used to abut against the outer circumference of the pipe to transfer the load to the pipe for testing the performance of the pipe. The middle part of the U-shaped plate (clamping plate) is used to clamp the reinforcing ribs, which can make the overall pipe fixation effect better and the force transmission more uniform.

[0023] In one possible implementation, the fastener is fixedly connected to the loading plate, and the loading plate and the connecting plate are connected by a fixed rod threadedly to adjust the distance between the loading plate and the connecting plate.

[0024] In the above technical solution, if the reinforcing rib is wide (the reinforcing rib protrudes high from the pipe), the distance between the connecting plate and the loading plate can be shortened by rotating the fixing rod, and the distance between the fastener fixed on the loading plate and the outer circumference of the pipe can be increased to fix the wider reinforcing rib. If the reinforcing rib is narrow (the reinforcing rib protrudes low from the pipe), the distance between the connecting plate and the loading plate can be increased by rotating the fixing rod, and the distance between the fastener fixed on the loading plate and the outer circumference of the pipe can be decreased to fix the narrower reinforcing rib.

[0025] In one possible implementation, the fastener has a plane and a concave arc surface arranged opposite to each other, the plane or concave arc surface being used to selectively abut against the surface of the reinforcing rib facing away from the pipe.

[0026] In the above technical solution, if the surface of the reinforcing rib facing away from the pipe is flat, the flat part of the fastener is used to abut against the reinforcing rib to fix it and facilitate the testing of the performance of the reinforced pipe; if the surface of the reinforcing rib facing away from the pipe is a convex arc surface, the concave arc surface of the fastener is used to abut against the reinforcing rib to fix it and facilitate the testing of the performance of the reinforced pipe.

[0027] Secondly, embodiments of this application provide a performance testing system for reinforced pipes, including a loading device and the aforementioned fixing device, wherein the loading device is configured to apply a load to the loading member.

[0028] In the above technical solution, the stiffening pipe is stably fixed by the fixing device, which can prevent the stiffening pipe from slipping when the loading device provides load, and can improve the accuracy of the performance test of the stiffening pipe.

[0029] Thirdly, a performance testing method for reinforced pipe is provided, applicable to the aforementioned performance testing system for reinforced pipe. The performance testing method includes: placing the reinforced pipe on a bearing surface; installing two clamping members on both sides of the reinforcing rib and clamping the reinforcing rib, while the side of the clamping members facing away from the loading member also abuts against the outer peripheral surface of the pipe away from the bearing surface; setting a fixing member above the reinforcing rib facing away from the pipe, so that the fixing member abuts against the surface of the reinforcing rib facing away from the pipe; connecting a loading device to the first side of the loading member and providing a load to the loading member.

[0030] In the above technical solution, by using the above method to fix the reinforced pipe and the reinforcing ribs at the same time, the fixing effect of the reinforced pipe can be improved so that its performance can be tested. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a sectional view of the reinforced pipe;

[0033] Figure 2 A schematic diagram of the first combined structure of the fixing device and the reinforcing pipe provided in the embodiments of this application;

[0034] Figure 3 A schematic diagram of the second combined structure of the fixing device and the reinforcing pipe provided in the embodiments of this application;

[0035] Figure 4 This is a flowchart illustrating the stiffness testing method for stiffened pipes provided in an embodiment of this application.

[0036] Icons: 100-Reinforced pipe; 110-Pipe; 111-Outer circumference; 120-Reinforcing rib; 121-First surface; 122-Second surface; 123-Protruding surface; 200-Fixing device; 210-Loading component; 211-First side; 212-Second side; 213-Connecting shaft; 214-Strip hole; 220-Clamping component; 221-Clamping plate; 222-Abutting plate; 223-Connecting plate; 224-Fixing rod; 230-Fixing component; 231-Flat surface; 232-Concave arc surface; 233-Connecting rod; 300-Bearing surface; 310-Groove. Detailed Implementation

[0037] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0043] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] Generally, the stiffness requirements for pipes installed in different locations vary. Therefore, it is necessary to select pipes with appropriate stiffness for installation at the corresponding locations to extend the service life of the pipes. Currently, the method for testing pipe stiffness is usually as follows: place the pipe laterally (along the pipe's axis) on a bearing surface, then place a loading device on top of the pipe and apply pressure. Once the pipe is compressed into an elliptical shape, the pipe stiffness is calculated based on the amount of deformation and the load provided by the loading device.

[0046] However, if the stiffened pipe is also tested using the above method, the test results will have a large error. The reason is that, due to its special structure, the stiffened pipe is not easy to fix. If the loading device acts directly on the stiffened pipe, slippage is likely to occur, leading to inaccurate stiffness test results.

[0047] Figure 1 For a sectional view of the reinforced tube 100, please refer to... Figure 1 The reinforced pipe 100 includes a pipe 110 and a reinforcing rib 120. The pipe 110 has an outer peripheral surface 111, and the reinforcing rib 120 is disposed on and protrudes from the outer peripheral surface 111 of the pipe 110. Along the axial direction of the pipe 110, the reinforcing rib 120 has a first surface 121 and a second surface 122, and the reinforcing rib 120 also has a protruding surface 123, which is the surface of the reinforcing rib 120 facing away from the pipe 110. Figure 1 The reinforcing ribs 120 of the reinforced pipe 100 are arranged around the outer perimeter of the pipe 110, that is to say... Figure 1 The reinforcing rib 120 of the reinforced pipe 100 is annular. In other embodiments, the reinforcing rib 120 of the reinforced pipe 100 may not be annular, but may protrude in block shape from the outer peripheral surface 111 of the pipe 110.

[0048] Due to the aforementioned structure of the stiffened tube 100, this application provides a fixing device 200, which can improve the fixing effect of the stiffened tube 100 and prevent slippage between the stiffened tube 100 and the loading device during stiffness testing, thereby making the stiffness test structure of the stiffened tube 100 more accurate.

[0049] Figure 2 This is a schematic diagram of the first combined structure of the fixing device 200 and the reinforcing tube 100 provided in an embodiment of this application. Please refer to... Figure 2The fixing device 200 includes a loading member 210, two clamping members 220, and a fixing member 230. The loading member 210 has a first side 211 for connecting a load and a second side 212 opposite to the first side 211. The two clamping members 220 are connected to the loading member 210 and located on the second side 212 of the loading member 210. The two clamping members 220 are configured to clamp a reinforcing rib 120. The side of the two clamping members 220 facing away from the loading member 210 is configured to abut against the outer peripheral surface 111 of the pipe 110. The fixing member 230 is connected to the loading member 210 and located on the second side 212 of the loading member 210. The fixing member 230 is configured to abut against the surface of the reinforcing rib 120 facing away from the pipe 110.

[0050] When fixing the reinforcing pipe 100, first place the reinforcing pipe 100 horizontally on the bearing surface 300 (the axis of the pipe 110 of the reinforcing pipe 100 is set in the horizontal direction), and then place the upper side of the reinforcing pipe 100 ( Figure 2 The reinforcing rib 120 (indicated by the middle arrow "up") is positioned between two clamping members 220 to fix both sides of the reinforcing rib 120. The protruding surface 123 of the reinforcing rib 120 is fixed using the fixing member 230, and the clamping member 220 fixes the upper side of the outer peripheral surface 111 of the pipe 110. Thus, the reinforced pipe 100 can be fixed between the bearing surface 300 and the fixing device 200. Since the reinforcing rib 120 of the reinforced pipe 100 is fixed in three directions, the fixing effect of the reinforced pipe 100 can be better.

[0051] A connecting shaft 213 is provided on the first side 211 of the loading member 210, through which a loading device can be connected to provide load to the fixing device 200 and the reinforcing tube 100 on the fixing device 200. The fixing device 200 fixes the reinforcing tube 100. When the loading device applies force, slippage between the reinforcing tube 100 and the loading device is less likely to occur, which can avoid stress concentration at the reinforcing rib 120 to a certain extent, resulting in more accurate test results.

[0052] Figure 3 This is a schematic diagram of the second combined structure of the fixing device 200 and the reinforcing tube 100 provided in an embodiment of this application. Please refer to... Figure 2 and Figure 3 In this application, each clamping member 220 includes a clamping plate 221 and an abutment plate 222 that are fixedly connected. The clamping plate 221 is connected to the loading member 210, and the two clamping plates 221 are configured to clamp the reinforcing rib 120. The side of the two abutment plates 222 that is away from the loading member 210 is configured to abut against the outer peripheral surface 111 of the pipe 110.

[0053] Optionally, each clamping member 220 further includes a connecting plate 223, which is fixedly connected to the end of the clamping plate 221 away from the abutment plate 222. Please continue reading. Figure 3The first surface 121 and the second surface 122 of the reinforcing rib 120 are both perpendicular to the axis of the pipe 110. The connecting plate 223, the clamping plate 221, and the abutment plate 222 are combined to form a U-shaped plate, with the U-shaped openings of the two U-shaped plates facing away from each other. After the reinforcing pipe 100 is fixed by the two clamping members 220, the two abutment plates 222 abut against the upper side of the outer peripheral surface 111 of the pipe 110, the two clamping plates 221 abut against the first surface 121 and the second surface 122 of the reinforcing rib 120 respectively, and the connecting plate 223 is connected to the loading member 210.

[0054] Please continue reading. Figure 3 In this application, the loading element 210 is a loading plate, that is, the loading element 210 is a plate-shaped structure. The loading plate is connected to the connecting plate 223, and the surface of the loading plate is horizontally set, as is the surface of the connecting plate 223. Optionally, the connecting plate 223 and the loading plate can be fixed together by a fixing rod 224.

[0055] In some embodiments, the two connecting plates 223 can reciprocate relative to the loading plate to adjust the distance between the two clamping plates 221. The adjustable distance between the two clamping plates 221 can accommodate the fixing of reinforcing ribs 120 of different thicknesses (reinforcing ribs 120 with different distances between the first surface 121 and the second surface 122), thus broadening its application range.

[0056] Optionally, the loading plate is provided with a strip-shaped hole 214, through which a fixing rod 224 passes and connects to the connecting plate 223. The fixing rod 224 can reciprocate within the strip-shaped hole 214 to adjust the distance between the two clamping plates 221. The fixing rod 224 can fix the connecting plate 223 and the loading plate longitudinally, and can also adjust the lateral distance between the two clamping plates 221.

[0057] For example, the fixing rod 224 can be a screw rod with nuts at both ends. The screw rod passes through the loading plate and the connecting plate 223, and the loading plate and the connecting plate 223 are located between the two nuts. The screw rod and the two nuts allow for longitudinal fixation of the connecting plate 223 and the loading plate, and the fixing structure is relatively simple. When the reinforcing rib 120 is thicker (the distance between the first surface 121 and the second surface 122 is larger), the left and right screw rods can be slid in the slotted hole 214 and adjusted in a direction away from each other to increase the distance between the two clamping plates 221; when the reinforcing rib 120 is thinner (the distance between the first surface 121 and the second surface 122 is smaller), the left and right screw rods can be slid in the slotted hole 214 and adjusted in a direction closer to each other to shorten the distance between the two clamping plates 221.

[0058] Please continue reading. Figure 3In this application, the fixing member 230 is disposed between the two clamping plates 221 and is connected to the loading plate. The force on the loading plate can be better transmitted to the fixing member 230, and the fixing member 230 is located between the two clamping plates 221 and connected to the loading plate, abutting against the reinforcing rib 120, thereby improving the fixing effect of the reinforcing tube 100 and the force on the loading plate can be better transmitted.

[0059] For different reinforced pipes 100, the height of the reinforcing rib 120 protruding from the outer peripheral surface 111 of the pipe 110 varies. To enable the fixing device 200 provided in this application to match different reinforced pipes 100, in one embodiment, the fixing member 230 is fixedly connected to the loading plate (the distance between the fixing member 230 and the loading plate remains unchanged), and the loading plate and the connecting plate 223 are threadedly connected by the fixing rod 224 to adjust the distance between the loading plate and the connecting plate 223. If the reinforcing rib 120 is wider (the reinforcing rib 120 protrudes higher from the pipe 110), the distance between the connecting plate 223 and the loading plate can be shortened by rotating the fixing rod 224, and the distance between the fixing member 230 fixed on the loading plate and the outer peripheral surface 111 of the pipe 110 can be increased to fix the wider reinforcing rib 120. If the reinforcing rib 120 is narrow (the reinforcing rib 120 protrudes low from the pipe 110), the distance between the connecting plate 223 and the loading plate can be increased by rotating the fixing rod 224, and the distance between the fixing member 230 fixed on the loading plate and the outer peripheral surface 111 of the pipe 110 can be reduced, so as to fix the narrower reinforcing rib 120.

[0060] For example, the fixing rod 224 can be a screw rod with nuts at both ends. The screw rod passes through the loading plate and the connecting plate 223, with the loading plate and the connecting plate 223 located between the two nuts. When fixing the reinforcing tube 100, the fixing member 230 is first abutted against the reinforcing rib 120, and then the screw rod and the two nuts are connected to fix the loading plate and the connecting plate 223. The distance between the loading plate and the connecting plate 223 can be adjusted based on the actual width of the reinforcing rib 120 to fix different reinforcing tubes 100.

[0061] In another embodiment, the loading plate abuts against the connecting plate 223, and the fixing member 230 is threadedly connected to the loading plate via a connecting rod 233 to adjust the distance between the fixing member 230 and the loading plate.

[0062] If the reinforcing rib 120 is wider (the reinforcing rib 120 protrudes higher from the pipe 110), the distance between the connecting plate 223 and the loading plate can be shortened by rotating the connecting rod 233, and the distance between the fastener 230 fixed on the loading plate and the outer peripheral surface 111 of the pipe 110 can be increased to fix the wider reinforcing rib 120. If the reinforcing rib 120 is narrower (the reinforcing rib 120 protrudes lower from the pipe 110), the distance between the connecting plate 223 and the loading plate can be increased by rotating the connecting rod 233, and the distance between the fastener 230 fixed on the loading plate and the outer peripheral surface 111 of the pipe 110 can be decreased to fix the narrower reinforcing rib 120.

[0063] For example, if the connecting rod 233 is a screw, and the reinforcing rib 120 is wider, the screw is rotated upward to increase the distance between the fixing member 230 and the pipe 110 so that the fixing member 230 and the reinforcing rib 120 abut against each other; if the reinforcing rib 120 is narrower, the screw is rotated downward to shorten the distance between the fixing member 230 and the pipe 110 so that the fixing member 230 and the reinforcing rib 120 abut against each other.

[0064] In this application, the fastener 230 has a flat surface 231 and a concave arc surface 232 disposed opposite to each other. The flat surface 231 or the concave arc surface 232 is used to selectively abut against the surface of the reinforcing rib 120 facing away from the pipe 110. If the protruding surface 123 of the reinforcing rib 120 is a flat surface 231, the flat surface 231 of the fastener 230 abuts against the reinforcing rib 120 to fix it, which facilitates the testing of the performance of the reinforced pipe 100; if the protruding surface 123 of the reinforcing rib 120 is an outwardly convex arc surface, the concave arc surface 232 of the fastener 230 abuts against the reinforcing rib 120 to fix it, which also facilitates the testing of the performance of the reinforced pipe 100.

[0065] The fastener 230 is detachably connected to the loading plate by screws. When fixing the reinforcing tube 100, the flat surface 231 or the concave arc surface 232 of the fastener 230 can be selected to face downwards based on the different shapes of the protruding surface 123 of the reinforcing rib 120, so as to fix different reinforcing tubes 100.

[0066] After the aforementioned fixing device 200 fixes the reinforcing pipe 100, it can cooperate with the loading device to apply a load to the reinforcing pipe 100 on the fixing device 200 to test the performance of the reinforcing pipe 100. The performance testing method of the reinforcing pipe 100 includes: placing the reinforcing pipe 100 on the bearing surface 300; installing two clamping members 220 on both sides of the reinforcing rib 120 and clamping the reinforcing rib 120, while the side of the clamping member 220 away from the loading member 210 also abuts against the outer peripheral surface 111 of the pipe 110 away from the bearing surface 300; setting the fixing member 230 above the reinforcing rib 120 away from the pipe 110 so that the fixing member 230 abuts against the surface of the reinforcing rib 120 away from the pipe 110; connecting the loading device to the first side 211 of the loading member 210 and providing a load to the loading member 210.

[0067] In this application, the performance test of the stiffened tube 100 can test not only stiffness, but also other properties. As long as the stiffened tube 100 can be fixed by the fixing device 200 provided in this application and then the performance is tested, it is within the protection scope of this application. Figure 4 This is a schematic flowchart illustrating the stiffness testing method for the stiffened tube 100 provided in this embodiment of the application. Please refer to... Figures 2-4 It includes the following steps:

[0068] S110, a pipe 110 with a reinforced pipe 100 cut out is formed. The pipe 110 has a reinforcing rib 120, and the reinforcing rib 120 is located in the middle of the pipe 110.

[0069] S120. Place the reinforced pipe 100 on the bearing surface 300. Optionally, the bearing surface 300 can be the ground or other work surface. A strip-shaped groove 310 capable of accommodating the bending deformation of the reinforcing rib 120 can be provided on the bearing surface 300, placing the lower part of the pipe 110 ( Figure 2 The reinforcing rib 120 (as shown in the diagram, "below") is provided in the groove 310.

[0070] S130. Fix the fixing device 200 above the reinforcing pipe 100, so that the two clamping plates 221 abut against the first surface 121 and the second surface 122 of the reinforcing rib 120 and clamp the reinforcing rib 120. The two abutting plates 222 abut against the upper part of the outer peripheral surface 111 of the pipe 110, and the fixing member 230 abuts against the protruding surface 123 of the reinforcing rib 120.

[0071] S140. Connect the loading device to the connecting shaft 213 of the loading plate and provide a load to the loading plate. Optionally, the loading device presses down on the stiffening pipe 100, causing the pipe 110 of the stiffening pipe 100 to become elliptical. Based on the deformation and the load provided by the loading device, the stiffness of the pipe 110 is calculated.

[0072] The stiffness testing method provided in this application can test the stiffness of the fiberglass reinforced pipe 100, and can also test the performance of reinforced pipes 100 made of other materials, making the test more accurate.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fixing device, characterized in that, For fixing a reinforced pipe, the reinforced pipe including a pipe and reinforcing ribs disposed on the outer circumference of the pipe, the fixing device including: A loading element having a first side for connecting a load and a second side opposite to the first side; the loading element is a loading plate; Two clamping members are connected to the loading member and located on the second side of the loading member, and the two clamping members are configured to clamp the reinforcing rib between them; the side of the two clamping members opposite to the loading member is configured to abut against the outer peripheral surface of the pipe; each clamping member includes a clamping plate and an abutment plate fixedly connected to it, the clamping plate being connected to the loading member and configured to clamp the reinforcing rib between them; the side of the two abutment plates opposite to the loading member is configured to abut against the outer peripheral surface of the pipe; each clamping member also includes a connecting plate, the connecting plate being connected to the end of the clamping plate away from the abutment plate, and the connecting plate being connected to the loading plate; A fastener is connected to the loading member and located on the second side of the loading member. The fastener is configured to abut against the surface of the reinforcing rib facing away from the pipe. The fastener is disposed between the two clamping plates and is connected to the loading plate.

2. The fixing device according to claim 1, characterized in that, The two connecting plates are capable of reciprocating relative to the loading plate to adjust the distance between the two clamping plates.

3. The fixing device according to claim 2, characterized in that, The loading plate is provided with a strip-shaped hole, through which the fixing rod passes and connects to the connecting plate. The fixing rod can reciprocate within the strip-shaped hole to adjust the distance between the two clamping plates.

4. The fixing device according to claim 1, characterized in that, The loading plate abuts against the connecting plate, and the fixing member is threadedly connected to the loading plate via a connecting rod to adjust the distance between the fixing member and the loading plate.

5. The fixing device according to claim 4, characterized in that, The connecting plate, the clamping plate, and the abutment plate are combined to form a U-shaped plate, and the U-shaped openings of the two U-shaped plates are opposite to each other.

6. The fixing device according to claim 1, characterized in that, The fixing member is fixedly connected to the loading plate, and the loading plate and the connecting plate are connected by a fixing rod threadedly to adjust the distance between the loading plate and the connecting plate.

7. The fixing device according to any one of claims 4 to 6, characterized in that, The fastener has a plane and a concave arc surface arranged opposite to each other, the plane or the concave arc surface being used to selectively abut against the surface of the reinforcing rib facing away from the pipe.

8. A performance testing system for reinforced pipes, characterized in that, It includes a loading device and a fixing device as described in any one of claims 1 to 7, wherein the loading device is configured to apply a load to the loading member.

9. A performance testing method for reinforced pipes, characterized in that, The performance testing method applicable to the performance testing system of claim 8 includes: Place the reinforced pipe on the bearing surface; Two clamping members are installed on both sides of the reinforcing rib to clamp the reinforcing rib. At the same time, the side of the clamping member opposite to the loading member also abuts against the outer peripheral surface of the pipe away from the bearing surface. The fixing member is set above the reinforcing rib opposite to the pipe so that the fixing member abuts against the surface of the reinforcing rib opposite to the pipe. The loading device is connected to the first side of the loading member and provides a load to the loading member.

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