HDPE silicon core pipe pressure resistance performance detection device and method

Abstract

This invention relates to the field of silicon core tube performance testing technology, specifically to a device and method for testing the compressive strength of HDPE silicon core tubes. The testing device includes a pressure-bearing base plate, a testing mechanism fixed on the pressure-bearing base plate, and a pressure-applying mechanism. The testing device is used to test the compressive strength of straightened and bent silicon core tube samples, simulating the static pressure load experienced by silicon core tubes after being buried underground and the static pressure load experienced by the outermost layer of rolled silicon core tubes during stacking or transportation. This invention uses a fan-shaped plate, an extrusion block, and a clamping assembly to bend the silicon core tube sample into the arc of the outermost layer of the silicon core tube reel, which facilitates the simulation of the stress situation of the outermost layer of the silicon core tube reel during stacking or transportation, making the compressive strength test results of the bent silicon core tube more accurate. This invention can also test the compressive strength of multiple straightened silicon core tube samples, and the clamping assembly can switch back and forth according to the different testing states of the silicon core tubes.

Description

Technical Field

[0001] This invention relates to the field of silicon core tube performance testing technology, specifically to a device and method for testing the pressure resistance performance of HDPE silicon core tubes. Background Technology

[0002] HDPE silicone core pipe is a new type of composite pipe with a silicone-based solid lubricant on its inner wall, often simply called silicone pipe. It is produced by simultaneous extrusion compounding using three plastic extruders. The main raw material is high-density polyethylene, and the core layer is silicone, a solid lubricant with the lowest coefficient of friction. It is widely used in optical fiber and cable communication network systems.

[0003] After being manufactured, silicon core tubes are usually wound into rolls for easy stacking. When transporting silicon core tube rolls, they need to be laid horizontally with each layer staggered. This causes the outermost layer of the bottom silicon core tube roll to be subjected to greater static pressure.

[0004] Currently, when testing the compressive strength of silicon core tubes, straight tubes laid flat are generally used as test samples. However, when silicon core tubes are rolled up, the outermost layer is under tension for a long time, resulting in residual stress inside. This stress alters the molecular arrangement of the tube, making it more prone to localized stress concentration when subjected to external pressure, and the compressive strength limit will be lower than that of the unstressed straightened state. Therefore, the test of straightened samples reflects the original compressive strength of the tube without initial stress and cannot reflect the negative impact of residual stress.

[0005] In addition, the silicon core tube reel will be subject to constant vibration during transportation. When the transportation starts and stops, brakes suddenly, or the road surface is bumpy, the silicon core tube reel will collide with the carriage wall and other goods, generating instantaneous impact pressure. Currently, the compressive strength test of horizontally straightened silicon core tube samples cannot reflect the effect of external vibration on compressive strength. Summary of the Invention

[0006] This invention provides a device and method for testing the compressive strength of HDPE silicon core tubes, in order to solve the technical problem in related technologies that the stress situation of rolled silicon core tubes cannot be reflected when straightened silicon core tube samples are tested for compressive strength, resulting in deviations in the test results.

[0007] This invention provides a device for testing the pressure resistance of HDPE silicon core tubes, including a pressure-bearing base plate, a testing mechanism fixed on the pressure-bearing base plate, and a pressure-applying mechanism. The testing mechanism includes vertical plates fixed at the front and rear ends of the upper surface of the pressure-bearing base plate. A flipping seat is rotatably installed between the two vertical plates. A squeezing block is slidably installed in the middle of the flipping seat. Electric push rods are fixed on both the left and right side walls of the flipping seat. A clamping assembly is installed between two corresponding electric push rods. The clamping assembly includes a flipping component fixed to the end of the electric push rod, and a clamping component is provided between the two flipping components.

[0008] The extrusion block consists of a semi-circular block and a rectangular block fixed in the middle of the top of the semi-circular block. The rectangular block passes through the flip seat from top to bottom. When the compressive strength is tested, the pressure-applying mechanism applies pressure to the silicon core tube or the top of the extrusion block.

[0009] The testing device is used to test the compressive strength of straightened and bent silicon core tube samples, simulating the static pressure load that silicon core tubes are subjected to after being buried underground and the static pressure load that the outermost layer of rolled silicon core tubes is subjected to during stacking or transportation.

[0010] In one possible implementation, the flipping seat consists of a rectangular plate and chamfered plates fixed at the front and rear ends of the rectangular plate. The openings of the two chamfered plates face each other, and the chamfered plates are rotatably mounted on the corresponding upright plates. A rectangular through hole is provided in the middle of the rectangular plate, and a rectangular block passes through the rectangular through hole from top to bottom.

[0011] In one possible implementation, a sector plate is fixed on both the left and right sides of the rectangular plate. The arc segment of the semicircular block is a minor arc, the top of the semicircular block is a plane, the arc segment of the sector plate and the arc segment of the semicircular block are on the same circular trajectory, and the upper surface of the sector plate is flush with the rectangular plate.

[0012] In one possible implementation, the flipping component includes an ear seat fixed to the end of an electric push rod, with a rotating shaft rotatably mounted inside the ear seat, the front and rear ends of the rotating shaft extending to the outside of the ear seat, and a fixing sleeve fixedly fitted on the rotating shaft.

[0013] In one possible implementation, the clamping member includes a fixed clamping plate fixed to two fixed sleeves at the front and rear, and a plurality of screws evenly distributed from front to back are fixedly installed on the side wall of the fixed clamping plate. The clamping member also includes a movable clamping plate slidably sleeved on all the screws, and a nut is screwed onto the screws after passing through the movable clamping plate.

[0014] In one possible implementation, locking components are installed on both the front and rear side walls of the ear seat. The locking components include a fixing ring fixed to the outer wall of the ear seat, the fixing ring being coaxial with the rotating shaft, and four circumferentially evenly distributed positioning grooves being formed on the circumferential surfaces at both ends of the rotating shaft. Four circumferentially evenly distributed elastic telescopic rods are fixed on the inner wall of the fixing ring, and an arc-shaped block that engages with the positioning groove is fixed at the end of the elastic telescopic rod.

[0015] In one possible implementation, the pressure applying mechanism includes a gantry frame, a hydraulic rod fixed to the top of the gantry frame, and a pressure applying element fixed to the bottom of the hydraulic rod. The two vertical sections of the gantry frame are fixedly connected to two upright plates. The pressure applying element includes several pressure plates evenly distributed from left to right. Adjacent pressure plates are fixedly connected by connecting plates. The lower surface of each pressure plate is provided with multiple thin-film pressure sensors evenly distributed from front to back.

[0016] In addition, the present invention also provides a method for testing the pressure resistance of HDPE silicon core tubes, including the following steps: S1, calibrating the support plane: moving the extrusion block down to be flush with the upper surface of the flipping seat.

[0017] S2. Place the sample: Place multiple cut silicon core tube samples on the flipping seat and align the silicon core tube samples with the thin-film pressure sensor below the pressure plate. Flip the flipping part 90 degrees toward the center of the extrusion block so that the openings of the clamping parts are facing each other.

[0018] S3. Clamping the sample: Insert the end of the silicon core tube into the clamping component and clamp it. The electric push rod extends and drives the clamping assembly to move, straightening the silicon core tube.

[0019] S4. Pressure test: The hydraulic rod extends and moves the pressure-applying component downward to apply pressure to the silicon core tube until the target compressive strength of the silicon core tube is reached. After maintaining this pressure for a period of time, the external force is removed. The silicon core tube is judged to be qualified by observing the deformation and surface cracking of the silicon core tube before and after the test.

[0020] The present invention also provides another method for testing the pressure resistance of HDPE silicon core tubes, including the following steps: S1, adjusting the supporting surface: the flipping seat rotates 180 degrees and remains locked, the extrusion block rotates accordingly, and the curved surface of the fan-shaped plate and the extrusion block together form the supporting surface for the silicon core tube sample.

[0021] S2. Place the sample: Flip the flipper 90 degrees away from the center of the extrusion block so that the openings of the clamping parts are all facing upwards and keep them locked. Place the silicon core tube sample in sequence on the supporting curved surface formed by the extrusion block and the fan-shaped plate.

[0022] S3. Clamping the sample: The end of the silicon core tube is inserted into the clamping device for initial clamping.

[0023] S4. Sample bending and shaping: The flipping seat rotates 180 degrees again and remains locked. During the rotation, the extrusion block moves down to the arc segment and the arc segment of the fan-shaped plate are on the same circular trajectory. The silicon core tube is bent and shaped, and finally the outer surface of the silicon core tube sample contacts the upper surface of the pressure base plate.

[0024] S5. Pressure Detection: The hydraulic rod extends, causing the pressure-applying component to move downwards. The lower surface of the pressure-applying component presses against the top of the extrusion block, causing the extrusion block to press down on the bent silicon core tube. Thin-film pressure sensors monitor the pressure value applied to the extrusion block in real time. The hydraulic rod gradually applies pressure until the bent silicon core tube ruptures or undergoes irreversible deformation. At this point, the pressure reaches the critical pressure value. The sum of the pressure values ​​monitored by the thin-film pressure sensors in contact with the extrusion block is the force value applied by the hydraulic rod. By distributing several thin-film pressure sensors corresponding to each silicon core tube from front to back at the lowest point of the curved surface of the extrusion block, the individual force condition of each silicon core tube can be monitored in real time.

[0025] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: The present invention uses a fan-shaped plate, an extrusion block and a clamping assembly to bend the silicon core tube sample into the arc of the outermost layer of the silicon core tube reel, which is convenient to simulate the stress situation of the outermost layer of the silicon core tube reel when stacking and stacking, and makes the test results of the compressive strength of the bent silicon core tube more accurate.

[0026] Furthermore, this invention can also perform compressive strength testing on multiple straightened silicon core tube samples, and the clamping assembly can switch back and forth according to the different testing states of the silicon core tube; moreover, this invention has a simple structure and lower cost, and with the help of an external vibration motor, it can simulate the stress situation of the outermost layer of the silicon core tube reel during transportation. Attached Figure Description

[0027] Figure 1 A three-dimensional structural diagram of the pressure resistance testing device for HDPE silicon core tubes provided in an embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional perspective view of the HDPE silicon core tube pressure resistance testing device provided in an embodiment of the present invention.

[0029] Figure 3 This is a three-dimensional structural diagram of the flip-up seat provided in an embodiment of the present invention.

[0030] Figure 4 A three-dimensional structural diagram of the electric push rod and the flipping component provided in the embodiment of the present invention.

[0031] Figure 5 This is an exploded view of the clamping component provided in an embodiment of the present invention.

[0032] Figure 6 for Figure 4 An enlarged schematic diagram of region A in the middle.

[0033] In the diagram: 1. Pressure-bearing base plate; 2. Detection mechanism; 21. Vertical plate; 22. Tilting seat; 221. Rectangular plate; 222. C-shaped plate; 223. Rectangular through hole; 224. Guide hole; 23. Fan-shaped plate; 24. Extrusion block; 25. Guide rod; 26. Electric push rod; 27. Clamping assembly; 271. Ear seat; 272. Rotating shaft; 273. Fixed sleeve; 274. Fixed clamping plate; 275. Screw; 276. Moving clamping plate; 277. Fixed ring; 278. Elastic telescopic rod; 279. Arc-shaped block; 3. Pressure application mechanism; 31. Portal frame; 32. Hydraulic rod; 33. Pressure application component; 331. Pressure plate; 332. Connecting plate. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Please see Figure 1 and Figure 2 A pressure resistance testing device for HDPE silicon core tubes is disclosed, capable of testing the compressive strength of straightened and bent silicon core tube samples. The compressive strength test of horizontally straightened silicon core tubes simulates the static pressure load experienced by the silicon core tube after it is buried underground. The compressive strength test of bent silicon core tubes simulates the static pressure load experienced by the outermost layer of rolled silicon core tubes during stacking. The testing device includes a pressure-bearing base plate 1, a testing mechanism 2 fixed on the pressure-bearing base plate 1, and a pressure-applying mechanism 3. The testing mechanism 2 includes vertical plates 21 fixed at both ends of the upper surface of the pressure-bearing base plate 1. A flipping seat 22 is rotatably installed between the two vertical plates 21. Clamping components 27 are installed on both sides of the flipping seat 22, and a pressing block 24 is slidably installed vertically in the middle of the flipping seat 22.

[0036] It should be noted that the rotation angle of the flip seat 22 is 180 degrees at a time, and it is locked after rotating 180 degrees. Specifically, the intermittent rotation and fixation of the flip seat 22 can be achieved by using gear transmission or gear and rack meshing transmission. When the flip seat 22 rotates, it will drive the pressing block 24 to rotate together, but the pressing block 24 will not completely detach from the flip seat 22.

[0037] Please see Figure 1 and Figure 3 The flipping seat 22 is composed of a rectangular plate 221 and chamfered plates 222 fixed at the front and rear ends of the rectangular plate 221. The openings of the two chamfered plates 222 are opposite to each other, and the chamfered plates 222 are rotatably mounted on the corresponding upright plate 21. A rectangular through hole 223 is provided in the middle of the rectangular plate 221. The extrusion block 24 is composed of a semi-circular block and a rectangular block fixed in the middle of the top of the semi-circular block. The rectangular block passes through the rectangular through hole 223 from top to bottom. Guide holes 224 are provided on the upper surface of the rectangular plate 221 on the left and right sides of the rectangular through hole 223. Guide rods 25 that slide through the guide holes 224 are fixed on the top left and right sides of the semi-circular block, and the top of the guide rods 25 is slightly lower than the top of the rectangular block. Fan-shaped plates 23 are fixed on both the left and right sides of the flipping seat 22. The upper surface of the fan-shaped plates 23 is flush with the rectangular plate 221.

[0038] It should be noted that the arc segment of the semicircular block is a minor arc, the top of the semicircular block is a plane, and both the semicircular block and the rectangular block can be hollow structures. The arc segment of the sector plate 23 and the arc segment of the semicircular block are on the same circular trajectory.

[0039] Please see Figure 3 , Figure 4 and Figure 5 Electric push rods 26 are fixed to both the left and right side walls of the C-shaped plate 222. A clamping assembly 27 is installed between two corresponding electric push rods 26. The clamping assembly 27 includes a flipping part fixed to the end of the electric push rod 26. A clamping member is provided between the two flipping parts. The flipping part includes an ear seat 271 fixed to the end of the electric push rod 26. A rotating shaft 272 is rotatably installed inside the ear seat 271. The front and rear ends of the rotating shaft 272 extend to the outside of the ear seat 271. A fixed sleeve 273 is fixedly sleeved on the rotating shaft 272. The clamping member includes a fixed clamping plate 274 fixed on the two fixed sleeves 273. Several screws 275 evenly distributed from front to back are fixedly installed on the side wall of the fixed clamping plate 274. The clamping member also includes a movable clamping plate 276 slidably sleeved on all the screws 275. After the screws 275 pass through the movable clamping plate 276, they are locked by nuts to clamp the end of the silicon core tube.

[0040] Please see Figure 4 and Figure 6 Locking components are installed on both the front and rear side walls of the ear seat 271. The locking components include a fixing ring 277 fixed to the outer wall of the ear seat 271. The fixing ring 277 is coaxial with the rotating shaft 272. The rotating shaft 272 has circumferentially distributed positioning grooves on the circumferential surfaces at both ends. The included angle between two adjacent positioning grooves is 90 degrees. Circumferentially distributed elastic telescopic rods 278 are fixed on the inner wall of the fixing ring 277. The included angle between two adjacent elastic telescopic rods 278 is also 90 degrees. An arc-shaped block 279 is fixed to the end of the elastic telescopic rod 278. When the arc-shaped block 279 corresponds to the positioning groove, the arc-shaped block 279 is stuck in the positioning groove under the elastic force of the elastic telescopic rod 278.

[0041] Please see Figure 1 The pressure applying mechanism 3 includes a portal frame 31, a hydraulic rod 32 fixed to the top of the portal frame 31, and a pressure applying component 33 fixed to the bottom of the hydraulic rod 32. The two vertical sections of the portal frame 31 are fixedly connected to two upright plates 21. The pressure applying component 33 includes several pressure plates 331 evenly distributed from left to right. Adjacent pressure plates 331 are fixedly connected by several connecting plates 332 evenly distributed from front to back. The lower surface of the connecting plates 332 is higher than the pressure plates 331. The connecting plates 332 can be fixed connectors or telescopic connectors. The hydraulic rod 32 is fixed to the pressure plate 331 located in the middle. The lower surface of each pressure plate 331 is provided with multiple thin-film pressure sensors (not shown in the figure) evenly distributed from front to back.

[0042] Silicon core tubes are generally buried underground and subjected to static pressure loads from the underground soil. During routine compressive strength testing, the two ends of the silicon core tube are usually fixed and straightened before pressure is applied to the silicon core tube.

[0043] When transporting rolled silicon core tubes, they are usually stacked in two layers. At this time, the outermost layer of the silicon core tube roll at the bottom not only bears the weight of the silicon core tube inside it, but also the weight of the corresponding silicon core tube above it. It will also be subject to external vibration during transportation. To simulate the above situation, a vibration motor is installed on the outside of the pressure base plate 1. The vibration frequency and intensity of the vibration motor need to be close to the vibration situation when the transport vehicle transports the silicon core tubes.

[0044] Specifically, when testing the compressive strength of the straightened silicon core tube sample, the process is as follows: S1, calibrating the support plane: First, the extrusion block 24 and the guide rod 25 move down under the action of gravity until the bottom of the extrusion block 24 contacts the upper surface of the pressure base plate 1. At this time, the top of the extrusion block 24 is flush with the upper surface of the rectangular plate 221, and the top of the guide rod 25 is slightly lower than the upper surface of the rectangular plate 221.

[0045] S2. Place the sample: Place multiple cut silicon core tube samples on the rectangular plate 221 and align the silicon core tube samples with the thin-film pressure sensor below the pressure plate 331. Flip the flipping part 90 degrees toward the center of the extrusion block 24 so that the openings of the clamping parts face each other, and the locking part keeps the clamping parts in the state where the openings face each other.

[0046] S3. Clamping the sample: Insert the end of the silicon core tube between the fixed clamping plate 274 and the movable clamping plate 276, move the movable clamping plate 276 upward so that it moves closer to the fixed clamping plate 274, and then tighten the nut on the screw 275 until the movable clamping plate 276 can no longer move, clamping the silicon core tube. The electric push rod 26 extends and drives the clamping assembly 27 to move, straightening the silicon core tube.

[0047] S4. Pressure test: The hydraulic rod 32 extends and moves the pressure-applying component 33 downward. The lower surfaces of multiple pressure plates 331 gradually press on the silicon core tube. The thin-film pressure sensor monitors the pressure value applied to the silicon core tube in real time. The hydraulic rod 32 gradually applies pressure until the target compressive strength of the silicon core tube is reached. After maintaining this pressure for a period of time, the external force is removed. The silicon core tube is judged to be qualified by observing the deformation and surface cracking of the silicon core tube before and after the test.

[0048] When bending the silicon core tube before testing its compressive strength, the process is as follows: S1. Adjusting the supporting surface: The flipping seat 22 is rotated 180 degrees by means of gear transmission and kept locked. The flipping seat 22 simultaneously rotates the extrusion block 24 and the guide rod 25 180 degrees. The fan-shaped plate 23 acts as a block against the extrusion block 24 to prevent the rectangular block of the extrusion block 24 from moving down too much. The curved surfaces of the fan-shaped plate 23 and the extrusion block 24 together form the supporting surface for the silicon core tube sample.

[0049] S2. Place the sample: Flip the flipper 90 degrees away from the center of the extrusion block 24 so that the openings of the clamping parts are all facing upwards and keep them locked. Place the silicon core tube sample in sequence on the supporting curved surface formed by the extrusion block 24 and the fan-shaped plate 23.

[0050] S3. Clamping the sample: The silicon core tubes can be squeezed against each other by external force or placed separately. The ends of the silicon core tubes are initially clamped after being inserted between the fixed clamping plate 274 and the movable clamping plate 276.

[0051] S4. Sample bending and shaping: The flipping seat 22 is driven to rotate 180 degrees again and remain locked through the gear transmission. During the rotation, the extrusion block 24 moves slightly down until the arc segment and the arc segment of the fan plate 23 are on the same circular trajectory. The silicon core tube is bent and shaped, and finally the outer surface of the silicon core tube sample contacts the upper surface of the pressure base plate 1.

[0052] S5. Pressure Detection: The hydraulic rod 32 extends, causing the pressure-applying component 33 to move downward. The lower surface of the pressure plate 331 presses against the top of the extrusion block 24, thereby causing the extrusion block 24 to press down on the bent silicon core tube. The thin-film pressure sensor monitors the pressure value applied to the extrusion block 24 in real time. The hydraulic rod 32 gradually applies pressure until the bent silicon core tube ruptures or undergoes irreversible deformation. At this point, the pressure reaches the critical pressure value. The sum of the pressure values ​​monitored by the thin-film pressure sensor in contact with the extrusion block 24 is the force value applied by the hydraulic rod 32.

[0053] It should be noted that the silicon core tube samples are selected with uniform specifications and cut to the same length. Ideally, each bent silicon core tube is subjected to uniform force. In order to make the force on the bent silicon core tube clearer, several thin-film pressure sensors (not shown in the figure) are distributed from front to back at the lowest point of the curved surface of the extrusion block 24 to monitor the individual force on each silicon core tube in real time.

[0054] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the pressure resistance of HDPE silicon core pipes, comprising a pressure-bearing base plate, a testing mechanism fixed on the pressure-bearing base plate, and a pressure-applying mechanism, characterized in that: The detection mechanism includes vertical plates fixed at the front and rear ends of the upper surface of the pressure base plate. A flipping seat is rotatably installed between the two vertical plates. A squeezing block is slidably installed in the middle of the flipping seat. Electric push rods are fixed on both the left and right side walls of the flipping seat. A clamping assembly is installed between two corresponding electric push rods. The clamping assembly includes a flipping part fixed to the end of the electric push rod. A clamping part is provided between the two flipping parts. The extrusion block consists of a semi-circular block and a rectangular block fixed in the middle of the top of the semi-circular block. The rectangular block passes through the flip seat from top to bottom. When the compressive strength is tested, the pressure-applying mechanism applies pressure to the silicon core tube or the top of the extrusion block. The flipping seat consists of a rectangular plate and a c-shaped plate fixed at the front and rear ends of the rectangular plate. A fan-shaped plate is fixed on both the left and right sides of the rectangular plate. The arc segment of the semicircular block is a minor arc, and the top of the semicircular block is a plane. The arc segment of the fan-shaped plate and the arc segment of the semicircular block are on the same circular trajectory, and the upper surface of the fan-shaped plate is flush with the rectangular plate. The arc segments of the fan-shaped plate and the semicircular block together form a supporting curved surface for the silicon core tube sample. The testing device is used to test the compressive strength of straightened and bent silicon core tube samples, simulating the static pressure load that silicon core tubes are subjected to after being buried underground and the static pressure load that the outermost layer of rolled silicon core tubes is subjected to during stacking or transportation.

2. The HDPE silicon core tube pressure resistance testing device according to claim 1, characterized in that: Two rectangular plates have openings facing each other, and the rectangular plates are rotatably mounted on the corresponding upright plates. A rectangular through hole is opened in the middle of the rectangular plate, and the rectangular block passes through the rectangular through hole from top to bottom.

3. The HDPE silicon core tube pressure resistance testing device according to claim 1, characterized in that: The flipping component includes an ear seat fixed to the end of the electric push rod. A rotating shaft is rotatably mounted inside the ear seat, and the front and rear ends of the rotating shaft extend to the outside of the ear seat. A fixing sleeve is fixedly sleeved on the rotating shaft.

4. The HDPE silicon core tube pressure resistance testing device according to claim 3, characterized in that: The clamping component includes a fixed clamping plate fixed on two fixed sleeves at the front and rear. Several screws evenly distributed from front to back are fixedly installed on the side wall of the fixed clamping plate. The clamping component also includes a movable clamping plate slidably sleeved on all the screws. The screws pass through the movable clamping plate and are screwed with nuts.

5. The HDPE silicon core tube pressure resistance testing device according to claim 3, characterized in that: Locking components are installed on both the front and rear side walls of the ear seat. The locking components include a fixing ring fixed to the outer wall of the ear seat. The fixing ring is coaxial with the rotating shaft. Four circumferentially evenly distributed positioning grooves are opened on the circumferential surfaces at both ends of the rotating shaft. Four circumferentially evenly distributed elastic telescopic rods are fixed on the inner wall of the fixing ring. An arc-shaped block that engages with the positioning groove is fixed at the end of the elastic telescopic rod.

6. The HDPE silicon core tube pressure resistance testing device according to claim 1, characterized in that: The pressure-applying mechanism includes a gantry frame, a hydraulic rod fixed to the top of the gantry frame, and a pressure-applying component fixed to the bottom of the hydraulic rod. The two vertical sections of the gantry frame are fixedly connected to two upright plates. The pressure-applying component includes several pressure plates evenly distributed from left to right. Adjacent pressure plates are fixedly connected by connecting plates. The lower surface of each pressure plate is provided with multiple thin-film pressure sensors evenly distributed from front to back.

7. A method for testing the pressure resistance of HDPE silicon core pipes, performed using the HDPE silicon core pipe pressure resistance testing device as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Align the support plane: Move the extrusion block down until it is flush with the upper surface of the flipping seat; S2. Place the sample: Place multiple cut silicon core tube samples horizontally on the flipping seat, and align the silicon core tube samples with the thin-film pressure sensor under the pressure plate. Flip the flipping part 90 degrees toward the center of the extrusion block so that the openings of the clamping parts are facing each other. S3. Clamping the sample: Insert the end of the silicon core tube into the clamping component and clamp it. The electric push rod extends and drives the clamping assembly to move, straightening the silicon core tube. S4. Pressure test: The hydraulic rod extends and moves the pressure-applying component downward to apply pressure to the silicon core tube until the target compressive strength of the silicon core tube is reached. The thin-film pressure sensor monitors the pressure value applied to the silicon core tube in real time. After maintaining for a period of time, the external force is removed. The silicon core tube is judged as qualified by observing the deformation and surface cracking of the silicon core tube before and after the test.

8. A method for testing the pressure resistance of HDPE silicon core pipes, performed using the HDPE silicon core pipe pressure resistance testing device as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Adjust the support surface: Rotate the flip seat 180 degrees and keep it locked. The extrusion block rotates accordingly. The curved surfaces of the fan-shaped plate and the extrusion block together form the support surface for the silicon core tube sample. S2. Place the sample: Flip the flipper 90 degrees away from the center of the extrusion block so that the openings of the clamping parts are all facing upwards and keep them locked. Place the silicon core tube sample in sequence on the supporting curved surface formed by the extrusion block and the fan-shaped plate. S3. Clamping the sample: The end of the silicon core tube is inserted into the clamping device for initial clamping; S4. Sample bending and shaping: The flipping seat rotates 180 degrees again and remains locked. During the rotation, the extrusion block moves down to the arc segment and the arc segment of the fan-shaped plate are on the same circular trajectory. The silicon core tube is bent and shaped, and finally the outer surface of the silicon core tube sample contacts the upper surface of the pressure base plate. S5. Pressure Detection: The hydraulic rod extends, causing the pressure-applying component to move downwards. The lower surface of the pressure-applying component presses against the top of the extrusion block, causing the extrusion block to press down on the bent silicon core tube. Thin-film pressure sensors monitor the pressure value applied to the extrusion block in real time. The hydraulic rod gradually applies pressure until the bent silicon core tube ruptures or undergoes irreversible deformation. At this point, the pressure reaches the critical pressure value. The sum of the pressure values ​​monitored by the thin-film pressure sensors in contact with the extrusion block is the force value applied by the hydraulic rod. By distributing several thin-film pressure sensors corresponding to each silicon core tube from front to back at the lowest point of the curved surface of the extrusion block, the individual force condition of each silicon core tube can be monitored in real time.

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