Corrugated pipe tensile property detection equipment

Abstract

The invention discloses corrugated pipe tensile property detection equipment, and relates to the technical field of corrugated pipe tensile property detection. Comprising a base, the base is fixedly connected with an inverted-U-shaped frame, the inverted-U-shaped frame is provided with a pulling element used for pulling a corrugated pipe, and a stretchability detection module is arranged in the pulling element on the inverted-U-shaped frame; the fixing frame is arranged on the inverted U-shaped frame, the fixing frame and the inverted U-shaped frame are jointly and rotationally connected with a rotating rod, the rotating rod is fixedly connected with a winding piece, the outer side of the winding piece is fixedly connected with a sliding rod, and the winding piece is used for supporting the interior of a corrugated pipe to be tested. By utilizing the contraction and release characteristics of the coil spring, when corrugated pipes with different diameters need to be adapted, the outer side expansion of the coil spring can be realized only by twisting the coil spring, so that the diameter of the inner pipe is flexibly adjusted to be matched with the sizes of the corrugated pipes, the inner pipe does not need to be individually customized for each corrugated pipe, and the material waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of testing technology for the tensile properties of corrugated pipes, and in particular to a device for testing the tensile properties of corrugated pipes. Background Technology

[0002] To meet performance requirements in different scenarios, corrugated pipes are typically manufactured using different materials. As researchers continuously develop new materials, corrugated pipes made from these new materials need to undergo mechanical performance testing before being put into use to evaluate whether their various performance indicators meet the standards. Mechanical performance testing of corrugated pipes includes a series of tests such as tensile strength, bending life, and compressive strength to comprehensively assess their structural durability. When testing the tensile strength of corrugated pipes, depending on the testing objective, tensile performance testing can be divided into two categories: The first is conventional tensile testing, which is a non-destructive test mainly used for quality control and service performance verification. It evaluates the yield strength and elastic modulus of the bellows by loading it within the elastic deformation range. The second is the tensile-to-fracture test, which is a destructive test used to study the ultimate performance of materials or verify the reliability of new processes. It involves continuously loading the corrugated pipe until it breaks, and then determining the maximum tensile strength, elongation, and fracture mode.

[0003] To prevent the corrugated pipe from collapsing or buckling locally due to insufficient radial stiffness during the stretching process, existing equipment usually requires inserting an inner tube into the corrugated pipe and using an outer clamp to hold both ends of the corrugated pipe for stretching, ensuring that the tensile force is uniformly transmitted along the axial direction.

[0004] However, in actual testing, due to the different application scenarios of corrugated pipes, their diameter ranges vary. Therefore, the insertable inner tube needs to be customized according to the diameter of the corrugated pipe, adopting a "one pipe, one match" mode. This mode not only leads to increased consumption of inner tube materials, but also significantly increases testing costs and operational complexity due to repeated disassembly, assembly and calibration of the corresponding inner tube. Summary of the Invention

[0005] To address the problems raised in the background art, the present invention provides a device for testing the tensile properties of corrugated pipes.

[0006] The technical implementation scheme of the present invention is as follows: a device for testing the tensile properties of corrugated pipes, comprising: The base is fixedly connected to an inverted U-shaped frame, which is provided with a pulling element for pulling the corrugated pipe. The pulling element on the inverted U-shaped frame is equipped with a tensile testing module. A fixed frame is provided on the inverted U-shaped frame. The fixed frame and the inverted U-shaped frame are rotatably connected to a rotating rod. A winding member is fixedly connected to the rotating rod. A sliding rod is fixedly connected to the outside of the winding member. The winding member is used to support the inside of the corrugated pipe to be tested. A stabilizing component, disposed on the base, is used to keep the winding component stable; An adjustment component, disposed on the fixed frame, is used to adjust the winding degree of the winding component.

[0007] Furthermore, the adjustment component includes: A fixed cylinder is fixedly connected to the fixed frame; A sliding frame is slidably connected to the fixed cylinder, and the sliding frame is slidably connected to the sliding rod; The first transmission gear is fixedly connected to the rotating rod; The first rack frame is slidably connected to the fixed cylinder and meshes with the first transmission gear. The first rack frame is fixedly connected to the sliding rod.

[0008] Furthermore, the portion of the rotating rod located inside the fixed cylinder is provided with a spiral groove, and a fixing pin is fixedly connected to one side of the sliding frame located inside the fixed cylinder. The fixing pin of the sliding frame is slidably connected to the threaded groove on the rotating rod, and both the sliding frame and the sliding rod are provided with graduations.

[0009] Furthermore, the winding component is equipped with a protective cover.

[0010] Furthermore, the stabilizing component includes: A multi-stage elastic telescopic rod is fixedly connected to the base, and a second transmission gear is fixedly connected to the side of the rotating rod near the base; A connecting frame is fixed to the telescopic part of the multi-stage elastic telescopic rod. The connecting frame is slidably connected to a second rack frame. The second rack frame is used to drive the sliding rod to move synchronously. The multi-stage elastic telescopic rod is used to drive the second rack frame to mesh with the second transmission gear.

[0011] Furthermore, it also includes: A fixing component, disposed on the inverted U-shaped frame, is used to fix the bellows under test. The fixing component includes: Two limiting frames are both located above the base. One limiting frame is fixedly connected to the inverted U-shaped frame, and the other limiting frame slides vertically along the inverted U-shaped frame via an electric slider. The limiting frame is slidably connected to two symmetrically distributed rectangular rods. Sliding sleeves are slidably connected to the opposing sides of the symmetrically distributed rectangular rods. The sliding sleeves are rotatably connected to symmetrically distributed hinge rods. The side of the hinge rod away from the adjacent sliding sleeve is rotatably connected to a connecting rod. Evenly distributed connecting ropes are fixedly connected between adjacent connecting rods on different rectangular rods of the same limiting frame.

[0012] Furthermore, a tension spring is provided between the rectangular rod and the adjacent sliding sleeve, and a pull rope is fixedly connected between the rectangular rod and the adjacent and symmetrically distributed hinge rods.

[0013] Furthermore, on the same limiting frame, evenly distributed elastic elements are fixed between adjacent connecting rods on different rectangular rods. The elastic elements are fixed to adjacent connecting ropes, and the elastic elements are used to drive the adjacent connecting ropes to reset.

[0014] Furthermore, the limiting frame is fixedly connected to a fixed shell, the fixed shell is rotatably connected to a rotating column, and the rotating column is wound with symmetrically distributed traction ropes. The symmetrically distributed traction ropes all pass through the limiting frame and are respectively fixedly connected to the adjacent rectangular rods.

[0015] Furthermore, it also includes: A locking assembly, disposed on the fixed housing and the inverted U-shaped frame, is used to limit the movement of the rotating rod and the rotating column. The locking assembly includes: Three knobs are respectively fixed to the two rotating columns and the rotating rod. The inverted U-shaped frame and the two fixed shells are provided with evenly distributed blind holes. The knobs are splined to limit the limiters. A compression spring is provided between the knobs and the adjacent limiters. The blind holes on the inverted U-shaped frame and the two fixed shells are used to limit the adjacent limiters.

[0016] The beneficial effects of this invention are as follows: In order to solve the problem of increased testing costs and operational complexity caused by the "one tube, one fitting" mode in the prior art, this invention proposes a method based on the dynamic adjustment of the inner tube diameter using a coil spring. By utilizing the contraction and release characteristics of the coil spring, when it is necessary to adapt to corrugated pipes of different diameters, it is only necessary to twist the coil spring to achieve its outer expansion, thereby flexibly adjusting the inner tube diameter to match the size of the corrugated pipe. There is no need to customize the inner tube for each corrugated pipe, reducing material waste. To address the problem that existing clamping methods can easily lead to localized deformation or damage to bellows, this invention proposes a novel clamping method. This method utilizes multiple ropes evenly bound to the surface of the bellows and applies tension, thereby effectively dispersing pressure and avoiding excessive localized stress on the bellows, allowing it to remain in normal use after non-destructive testing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural bottom view of the present invention; Figure 3 This is a three-dimensional structural cross-sectional view of the inverted U-shaped frame of the present invention; Figure 4 This is a three-dimensional structural diagram of the fixing frame of the present invention; Figure 5 This is a three-dimensional structural diagram showing the positional relationship between the fixing frame and the fixing cylinder of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the limiting component of the present invention; Figure 7 This is a three-dimensional structural cross-sectional view of the sliding frame of the present invention; Figure 8 This is a three-dimensional structural diagram of the stabilizing component of the present invention; Figure 9 This is a three-dimensional structural cross-sectional view of the multi-stage elastic telescopic rod of the present invention; Figure 10 This is a three-dimensional structural cross-sectional view of the limiting frame of the present invention; Figure 11 This is a three-dimensional structural cross-sectional view of the sliding sleeve of the present invention; Figure 12 This is a three-dimensional structural cross-sectional view of the fixing shell of the present invention.

[0018] Reference numerals: 1-Base, 2-Inverted U-shaped frame, 3-Fixed frame, 4-Rotating rod, 5-Retracting component, 6-Sliding rod, 7-Fixed cylinder, 8-Sliding frame, 9-First transmission gear, 10-First rack frame, 11-Protective cover, 12-Multi-stage elastic telescopic rod, 13-Second transmission gear, 14-Connecting frame, 15-Second rack frame, 20-Limiting frame, 21-Rectangular rod, 22-Sliding sleeve, 23-Hinged rod, 24-Connecting rod, 25-Connecting rope, 26-Elastic component, 27-Fixed shell, 28-Rotating column, 29-Knob, 30-Limiting component. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0020] To address the issue that the existing "one pipe, one fitting" model increases testing costs and operational complexity, this invention utilizes the contraction and release of a coil spring. When the inner tube diameter needs to be changed according to the diameter of the corrugated pipe under test, the coil spring is twisted, causing the outer side of the coil spring to expand or contract, thereby adapting to the diameter of the corrugated pipe and achieving the effect of eliminating the need to customize the inner tube for each diameter.

[0021] Example 1: A device for testing the tensile properties of corrugated pipes, such as... Figures 1-6As shown, it includes: a base 1, with an inverted U-shaped frame 2 fixedly connected to the base 1. The inverted U-shaped frame 2 is provided with a pulling element for pulling the corrugated pipe, and the pulling element on the inverted U-shaped frame 2 has a tensile testing module inside (the above is prior art and therefore not shown in the attached figure); a fixing frame 3, which is set on the inverted U-shaped frame 2. The fixing frame 3 and the inverted U-shaped frame 2 are rotatably connected to a rotating rod 4. The rotating rod 4 is fixedly connected to a winding component 5, and a sliding rod 6 is fixedly connected to the outside of the winding component 5. The winding component 5 is used to support the inside of the corrugated pipe to be tested; a stabilizing component, which is set on the base 1, for keeping the winding component 5 stable; and an adjusting component, which is set on the fixing frame 3, for adjusting the winding degree of the winding component 5.

[0022] The above solutions address the problem of increased testing costs and operational complexity caused by the "one pipe, one fitting" model in existing technologies. By releasing the winding component 5, it can adapt to corrugated pipes of different diameters, reducing material waste and simplifying the operation process. The winding component 5 is an existing coil spring, and it is initially in a retracted state. The base 1 is equipped with a control terminal, and all electrical components in this device are electrically connected to the control terminal.

[0023] like Figure 3-Figure 7 As shown, the adjustment assembly includes: a fixed cylinder 7, fixedly connected to the fixed frame 3; a sliding frame 8, slidably connected to the fixed cylinder 7, and the sliding frame 8 is slidably connected to the sliding rod 6; a first transmission gear 9, fixedly connected to the rotating rod 4; a first rack frame 10, slidably connected to the fixed cylinder 7 and meshing with the first transmission gear 9, the first rack frame 10 being fixedly connected to the sliding rod 6; the portion of the rotating rod 4 located inside the fixed cylinder 7 is provided with a spiral groove; a fixing pin is fixedly connected to one side of the sliding frame 8 located inside the fixed cylinder 7; the fixing pin of the sliding frame 8 is slidably connected to the threaded groove on the rotating rod 4; both the sliding frame 8 and the sliding rod 6 are provided with graduations; and the winding component 5 is fitted with a protective cover 11.

[0024] In the above scheme, a limiting groove is provided on the right side of the fixed cylinder 7 for the sliding frame 8 to move vertically. When the rotating rod 4 drives the first transmission gear 9 to rotate, the first transmission gear 9 transmits power to the first rack frame 10, causing the first rack frame 10 to drive the sliding rod 6 to move actively away from the central axis of the rotating rod 4, thereby expanding the radius of the winding member 5. The central axis of the fixed cylinder 7 and the central axis of the rotating rod 4 coincide. The spiral groove on the rotating rod 4 is used to squeeze the fixing pin of the sliding frame 8. By squeezing the fixing pin of the sliding frame 8 through the spiral groove on the rotating rod 4, the sliding frame 8 and the fixing pin move. During the movement of the sliding frame 8, the degree of external expansion of the winding member 5 is identified by the scale on the sliding rod 6. The protective cover 11 is made of elastic deformable material and is used to separate the outside of the winding member 5 from the inside of the corrugated tube to be tested. When the sliding rod 6 moves along the sliding frame 8 away from the central axis of the rotating rod 4, the winding member 5 expands, thereby driving the protective cover 11 to expand synchronously.

[0025] like Figures 1-3 , Figure 8 and Figure 9 As shown, the stabilizing component includes: a multi-stage elastic telescopic rod 12, fixedly connected to the base 1, and a second transmission gear 13 fixedly connected to the side of the rotating rod 4 near the base 1; a connecting frame 14, fixedly connected to the telescopic part of the multi-stage elastic telescopic rod 12, and a second rack frame 15 slidably connected to the connecting frame 14. The second rack frame 15 is used to drive the sliding rod 6 to move synchronously, and the multi-stage elastic telescopic rod 12 is used to drive the second rack frame 15 to mesh with the second transmission gear 13.

[0026] In the above scheme, the second transmission gear 13 drives the second rack frame 15, causing the second rack frame 15 to move laterally. When the bellows to be tested needs to be inspected, the second rack frame 15 is connected to the sliding rod 6, and the extension end of the multi-stage elastic telescopic rod 12 contacts the rotating rod 4. The second transmission gear 13 and the first transmission gear 9 are exactly the same.

[0027] Working principle: When destructive testing is required on the bellows under test, the user first presses the telescopic end of the multi-stage elastic telescopic rod 12 downward. During the process of pressing the telescopic end of the multi-stage elastic telescopic rod 12 downward, the connecting frame 14 drives the second rack frame 15 to move downward, so that the second rack frame 15 gradually moves away from the second transmission gear 13 and the sliding rod 6 (during the retraction of the telescopic end of the multi-stage elastic telescopic rod 12, it gradually disengages from the contact with the lower end of the rotating rod 4).

[0028] Once the distance between the telescopic end of the multi-stage elastic telescopic rod 12 and the rotating rod 4 is sufficient to allow the corrugated tube to be tested to be fitted onto the protective cover 11, the user no longer presses the telescopic end of the multi-stage elastic telescopic rod 12, and then the user fits the corrugated tube to be tested onto the protective cover 11.

[0029] After the corrugated pipe to be tested is fitted onto the protective cover 11, the user releases the multi-stage elastic telescopic rod 12. Under the action of its own elastic force, the telescopic part of the multi-stage elastic telescopic rod 12 drives the connecting frame 14 and the second rack frame 15 to move upward.

[0030] When the telescopic end of the multi-stage elastic telescopic rod 12 moves to engage with the rotating rod 4, the second rack frame 15 meshes with the second transmission gear 13, and the second rack frame 15 is fitted onto the sliding rod 6 (see reference). Figure 8 and Figure 9(In the state of being tested), after completing the above actions, the corrugated pipe to be tested has been fitted onto the protective cover 11. Then, the user rotates the rotating rod 4 clockwise (clockwise when viewed from above). During the rotation of the rotating rod 4, the first transmission gear 9 rotates synchronously. The first transmission gear 9 then drives the first rack frame 10 to move to the right. During the movement of the first rack frame 10 to the right, the sliding rod 6 moves synchronously (during the rotation of the rotating rod 4, the second transmission gear 13 drives the second rack frame 15 to move, so that the first rack frame 10 and the second rack frame 15 move synchronously). During the movement of the sliding rod 6, the outer side of the winding component 5 moves to the right, increasing the expansion radius of the winding component 5 (during the movement of the sliding rod 6, it slides to the right along the sliding frame 8, and the value of the expansion radius of the winding component 5 can be obtained through the scale on the sliding frame 8).

[0031] During the rotation of the rotating rod 4, the winding component 5 is released, increasing the density of the winding component 5 and thus increasing the external support force of the winding component 5. This allows the winding component 5 to provide stable support to the bellows through the protective cover 11 after expansion. During the rotation of the rotating rod 4, the fixed pin on the sliding frame 8 is pressed downward through the threaded groove on it, thereby causing the sliding frame 8 to move downward along the fixed cylinder 7. The density of the winding component 5 can be determined by the scale on the sliding rod 6.

[0032] After the winding component 5 expands and the corrugated pipe under test is internally fixed through the protective cover 11, the user stops the operation and then fixes the upper and lower ends of the corrugated pipe under test through the existing clamping device. Then, the tensile performance of the corrugated pipe is tested by the tensile testing module inside the pulling element through the back movement of the pulling element (or by the movement of a single clamping device). When the corrugated pipe is broken, the clamping device stops moving and feeds back the recorded value to the control terminal.

[0033] After the tensile performance test of the bellows is completed, the clamping device releases the bellows that have been tested. Then, the user rotates the rotating rod 4 in the opposite direction, causing the first transmission gear 9 to drive the first rack frame 10 to move to the left. During the rotation of the rotating rod 4, the second transmission gear 13 drives the second rack frame 15 to move synchronously to the left, so that the first rack frame 10 and the second rack frame 15 move synchronously. During the reverse rotation of the rotating rod 4, the fixed pin on the sliding frame 8 is guided upward through the threaded groove on it, so that the sliding frame 8 moves upward and resets along the sliding rod 6. After the above parts are reset, the user no longer rotates the rotating rod 4. Then, the user removes the bellows that have been tested from the protective cover 11 (before removal, repeat the step of disengaging the telescopic end of the multi-stage elastic telescopic rod 12 from contact with the rotating rod 4). When the mechanical performance test of the bellows to be tested is required again, the above actions can be repeated.

[0034] When verifying the performance of a bellows under normal operating conditions, it is usually sufficient to stretch the bellows to a specified tensile force. This testing method ensures that the product meets design requirements without breaking it (referred to as non-destructive tensile testing). During testing, the bellows under test is fixed at both ends using clamping equipment, and tensile force is applied to simulate the working environment. However, existing clamping equipment presents the following problems: traditional clamping equipment (such as grippers or rigid clamps) can easily cause excessive local pressure on the clamping parts of the bellows under test, leading to deformation or damage to the clamping parts. This situation will affect the test results. Accuracy is crucial. If traditional clamping equipment deforms or damages the clamping part of the corrugated pipe during the testing process, the corrugated pipe cannot be used normally (deformation or damage to the clamping part affects the appearance quality, making it unable to meet the requirements of the actual working environment). To solve the above problems, this invention uses multiple ropes evenly distributed on the surface of the corrugated pipe and applies tension to avoid the problem of excessive local stress. Compared with traditional rigid clamps, it reduces the damage to the appearance and structural integrity of the corrugated pipe, allowing the corrugated pipe to still be in normal use after completing non-destructive testing.

[0035] Example 2: Based on Example 1, such as Figure 3 , Figure 4 , Figure 10 and Figure 11 As shown, it also includes: a fixing component, set on the inverted U-shaped frame 2, used to fix the bellows to be tested. The fixing component includes: two limiting frames 20, both set above the base 1. One limiting frame 20 is fixedly connected to the inverted U-shaped frame 2, and the other limiting frame 20 slides vertically along the inverted U-shaped frame 2 via an electric slider. The limiting frame 20 is slidably connected to two symmetrically distributed rectangular rods 21. Sliding sleeves 22 are slidably connected to the opposite sides of the symmetrically distributed rectangular rods 21. The sliding sleeves 22 are rotatably connected to symmetrically distributed hinge rods 23. The side of the hinge rod 23 away from the adjacent sliding sleeve 22 is rotatably connected to a connecting rod 24. Adjacent connecting rods on different rectangular rods 21 on the same limiting frame 20 are connected to each other. Evenly distributed connecting ropes 25 are fixed between the rectangular rods 24. A tension spring is provided between the rectangular rod 21 and the adjacent sliding sleeve 22. Pull ropes are fixed between the rectangular rod 21 and the adjacent and symmetrically distributed hinged rods 23. Evenly distributed elastic elements 26 are fixed between adjacent connecting rods 24 on different rectangular rods 21 on the same limiting frame 20. The elastic elements 26 are fixed to the adjacent connecting ropes 25. The elastic elements 26 are used to drive the adjacent connecting ropes 25 to reset. A fixed shell 27 is fixed to the limiting frame 20. A rotating column 28 is rotatably connected to the fixed shell 27. A symmetrically distributed traction rope is wound around the rotating column 28. The symmetrically distributed traction ropes all pass through the limiting frame 20 and are fixed to the adjacent rectangular rods 21 respectively.

[0036] In the above scheme, when the two sliding sleeves 22 on the same horizontal line move in opposite directions, the connecting rope 25 is stretched, thereby shortening the distance between the middle of the connecting rope 25 and the bellows. The bellows is fixed by the contraction of the two adjacent connecting ropes 25 in the front-back direction. When the lower limiting frame 20 is driven to move downward by the electric slider in the inverted U-shaped frame 2, the two limiting frames 20 move away from each other and cooperate with the contraction of the two connecting ropes 25 to detect the tensile strength of the bellows. The tension spring on the rectangular rod 21 is used to drive the rectangular rod 21 to reset. When the pull rope on the rectangular rod 21 pulls the adjacent hinge rod 23, the hinge rod 23 moves towards the middle of the sliding sleeve 22, further shortening the distance between the ends of the two connecting ropes 25, thereby increasing the contact area with the bellows. In this embodiment, the bellows is fixed by a fixing component instead of the pulling element mentioned in embodiment 1.

[0037] Working principle: After the winding component 5 is adjusted (i.e., after the winding component 5 adapts to the corrugated pipes of different diameters to be tested), the user first operates the parts within the upper limiting frame 20 to fix the upper side of the corrugated pipe to be tested, as detailed below: The user first calibrates the corrugated part of the corrugated pipe to be tested with the four connecting ropes 25 on the upper side, so that the horizontal plane of the connecting ropes 25 is parallel to the horizontal plane of the trough of the corrugated pipe to be tested. Then the user rotates the counterclockwise rotating column 28 (counterclockwise when viewed from top to bottom). During the rotation of the rotating column 28, the two traction ropes are gradually tightened. Taking the tightening process of one traction rope as an example: when the traction rope on the rotating column 28 is tightened, it pulls the rectangular rod 21 away from the corrugated pipe to be tested. The rectangular rod 21 drives the adjacent sliding sleeve 22 to move synchronously through the adjacent tension spring. The sliding sleeve 22 drags the connecting rope 25 through the two hinged rods 23, so that the connecting rope 25 and the adjacent elastic element 26 move to one side of the corrugated pipe to be tested (the elastic element 26 deforms during the movement).

[0038] After the front and rear sides of the two connecting ropes 25 contact the front and rear sides of the corrugated pipe to be tested (the sliding sleeve 22 stops moving), the rectangular rod 21 continues to move away from the corrugated pipe to be tested. During the movement of the rectangular rod 21, it pulls the adjacent tension spring and the two pull ropes. The two pull ropes drive the two adjacent hinge rods 23 to swing towards each other along the adjacent sliding sleeve 22. Through the swing of the two hinge rods 23 towards each other, the distance between the ends of the two adjacent connecting ropes 25 in the front and rear direction is reduced, and the contact area between the connecting ropes 25 and the trough of the corrugated pipe to be tested is increased. The corrugated pipe to be tested is fixed by means of a loop (at this time, the user no longer rotates the rotating column 28).

[0039] After the parts located in the upper limiting frame 20 are fixed to the bellows to be tested, the parts located in the lower limiting frame 20 are fixed in the same way.

[0040] After the corrugated pipe to be tested is fixed, the user operates the electric slider on the lower limit frame 20 through the control terminal. The lower limit frame 20 stretches the lower part of the corrugated pipe downward through its upper parts. After stretching to the required working length, the user operates the electric slider on the lower limit frame 20 through the control terminal to move its upper parts upward to reset and restore the basic state. After the corrugated pipe is tested, the corrugated pipe that meets the standard is put into normal use. If the corrugated pipe deforms or undergoes other changes at this time, the decision to continue production will be made on a case-by-case basis.

[0041] After the bellows inspection is completed, the user rotates the rotating column 28 in the opposite direction to loosen the traction rope. Under the action of the elastic element 26 and the tension spring retracting and resetting, the sliding sleeve 22 moves along the adjacent rectangular rod 21 to reset. Then, relying on the elastic force of the elastic element 26 itself, the connecting rope 25 and its accessories are restored to their original positions. Figure 10 and Figure 11 Once the bellows reaches the specified state, the user can remove it after testing. To perform further testing on the bellows, simply repeat the above steps.

[0042] Example 3: Based on the above examples, such as Figure 3 , Figure 5 , Figure 6 , Figure 10 and Figure 12 As shown, it also includes: a locking assembly, disposed on the fixed housing 27 and the inverted U-shaped frame 2, used to limit the rotation rod 4 and the rotating column 28. The locking assembly includes: three knobs 29, which are respectively fixed to the two rotating columns 28 and the rotation rod 4. The inverted U-shaped frame 2 and the two fixed housings 27 are provided with evenly distributed blind holes. The knobs 29 are splined connected to limit members 30. A compression spring is provided between the knobs 29 and the adjacent limit members 30. The blind holes on the inverted U-shaped frame 2 and the two fixed housings 27 are used to limit the adjacent limit members 30.

[0043] Before rotating the lever 4 or rotating column 28, the user first pulls the limiting member 30 upward. During the upward movement of the limiting member 30, it compresses the adjacent compression spring and temporarily disengages from the adjacent blind hole on the inverted U-shaped frame 2 or fixed shell 27, thereby releasing the limiting of the lever 4 or rotating column 28. When the lever 4 or rotating column 28 is no longer rotated, the limiting member 30 is released. Under the action of the adjacent compression spring, the limiting member 30 is reinserted into the adjacent blind hole on the inverted U-shaped frame 2 or fixed shell 27 to restore the limiting of the lever 4 or rotating column 28.

[0044] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims

1. A device for testing the tensile properties of corrugated pipes, characterized in that, include: The base (1) is fixedly connected to an inverted U-shaped frame (2), and the inverted U-shaped frame (2) is provided with a pulling element for pulling the corrugated pipe. The pulling element on the inverted U-shaped frame (2) is provided with a tensile testing module. A fixed frame (3) is provided on the inverted U-shaped frame (2). The fixed frame (3) and the inverted U-shaped frame (2) are rotatably connected to a rotating rod (4). A winding member (5) is fixedly connected to the rotating rod (4). A sliding rod (6) is fixedly connected to the outside of the winding member (5). The winding member (5) is used to support the inside of the corrugated pipe to be tested. A stabilizing component, disposed on the base (1), is used to keep the winding component (5) stable; An adjustment component is provided on the fixed frame (3) for adjusting the winding degree of the winding component (5).

2. The equipment for testing the tensile properties of corrugated pipes according to claim 1, characterized in that, The adjustment component includes: The fixed cylinder (7) is fixedly connected to the fixed frame (3); A sliding frame (8) is slidably connected to the fixed cylinder (7), and the sliding frame (8) is slidably connected to the sliding rod (6); The first transmission gear (9) is fixedly connected to the rotating rod (4). The first rack frame (10) is slidably connected to the fixed cylinder (7) and meshes with the first transmission gear (9). The first rack frame (10) is fixedly connected to the sliding rod (6).

3. The equipment for testing the tensile properties of corrugated pipes according to claim 2, characterized in that, The portion of the rotating rod (4) located inside the fixed cylinder (7) is provided with a spiral groove. The sliding frame (8) located inside the fixed cylinder (7) is fixedly connected to a fixing pin on one side. The fixing pin of the sliding frame (8) is slidably connected to the threaded groove on the rotating rod (4). Both the sliding frame (8) and the sliding rod (6) are provided with scales.

4. The equipment for testing the tensile properties of corrugated pipes according to claim 1, characterized in that, The winding component (5) is fitted with a protective cover (11).

5. The equipment for testing the tensile properties of corrugated pipes according to claim 3, characterized in that, The stabilizing component includes: A multi-stage elastic telescopic rod (12) is fixedly connected to the base (1), and a second transmission gear (13) is fixedly connected to the side of the rotating rod (4) near the base (1). The connecting frame (14) is fixed to the telescopic part of the multi-stage elastic telescopic rod (12). The connecting frame (14) is slidably connected to the second rack frame (15). The second rack frame (15) is used to drive the sliding rod (6) to move synchronously. The multi-stage elastic telescopic rod (12) is used to drive the second rack frame (15) to mesh with the second transmission gear (13).

6. The equipment for testing the tensile properties of corrugated pipes according to claim 5, characterized in that, Also includes: A fixing component, disposed on the inverted U-shaped frame (2), is used to fix the corrugated pipe to be tested. The fixing component includes: Two limiting frames (20) are both set above the base (1). One of the limiting frames (20) is fixedly connected to the inverted U-shaped frame (2), and the other limiting frame (20) slides vertically along the inverted U-shaped frame (2) via an electric slider. The limiting frame (20) is slidably connected to two symmetrically distributed rectangular rods (21). Sliding sleeves (22) are slidably connected to the opposite sides of the symmetrically distributed rectangular rods (21). The sliding sleeves (22) are rotatably connected to symmetrically distributed hinge rods (23). The side of the hinge rod (23) away from the adjacent sliding sleeve (22) is rotatably connected to a connecting rod (24). The connecting rods (24) on different rectangular rods (21) on the same limiting frame (20) are fixedly connected to evenly distributed connecting ropes (25).

7. The equipment for testing the tensile properties of corrugated pipes according to claim 6, characterized in that, A tension spring is provided between the rectangular rod (21) and the adjacent sliding sleeve (22), and a pull rope is fixed between the rectangular rod (21) and the adjacent and symmetrically distributed hinge rods (23).

8. The equipment for testing the tensile properties of corrugated pipes according to claim 7, characterized in that, On the same limiting frame (20), there are uniformly distributed elastic elements (26) fixed between adjacent connecting rods (24) on different rectangular rods (21). The elastic elements (26) are fixed to the adjacent connecting ropes (25) and are used to drive the adjacent connecting ropes (25) to reset.

9. The equipment for testing the tensile properties of corrugated pipes according to claim 8, characterized in that, The limiting frame (20) is fixedly connected to a fixed shell (27), and the fixed shell (27) is rotatably connected to a rotating column (28). The rotating column (28) is wound with symmetrically distributed traction ropes, which all pass through the limiting frame (20) and are respectively fixedly connected to the adjacent rectangular rod (21).

10. The equipment for testing the tensile properties of corrugated pipes according to claim 9, characterized in that, Also includes: A locking assembly, disposed on the fixed housing (27) and the inverted U-shaped frame (2), is used to limit the movement of the rotating rod (4) and the rotating column (28). The locking assembly includes: Three knobs (29) are fixed to the two rotating columns (28) and the rotating rod (4) respectively. The inverted U-shaped frame (2) and the two fixed shells (27) are provided with evenly distributed blind holes. The knobs (29) are splined connected to the limiting members (30). A compression spring is provided between the knobs (29) and the adjacent limiting members (30). The blind holes on the inverted U-shaped frame (2) and the two fixed shells (27) are used to limit the adjacent limiting members (30).

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