A detection device for CPVC chlorinated polyvinyl chloride pipe production and processing

Abstract

This invention relates to the field of pipeline testing technology, specifically a testing device for the production and processing of CPVC (chlorinated polyvinyl chloride) pipes. It includes a main body of a hydrostatic / burst testing machine with a constant-temperature chamber, within which multiple small mounting chambers are installed. This invention utilizes multiple independent mounting chambers, each with an on-demand water injection mechanism controlled by a communication control component. The water inlet channel of the small chamber automatically opens only when the mounting plate is correctly closed, injecting water only into that small chamber until the sample is submerged, unlike traditional constant-temperature chambers which require filling the entire large chamber. Because the cross-sectional area of ​​the mounting chamber is much smaller than the entire constant-temperature chamber, and the water injection height only needs to submerge the sample, water consumption is reduced. Simultaneously, the amount of water requiring heating is significantly reduced, correspondingly reducing the electrical or steam energy consumption for heating, thus significantly lowering testing costs and meeting the requirements of green manufacturing and energy conservation.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, specifically to an inspection device for the production and processing of CPVC (chlorinated polyvinyl chloride) pipes. Background Technology

[0002] Chlorinated polyvinyl chloride (CPVC) pipes are widely used in building water supply and drainage, industrial fluid transportation, and other fields due to their excellent heat resistance, corrosion resistance, and mechanical strength. To ensure the long-term pressure resistance and safety of CPVC pipes in actual use, hydrostatic and burst tests must be performed during the production process to determine the pipe's pressure resistance time and burst strength. The hydrostatic / burst testing machine is the core equipment for evaluating the pressure resistance of CPVC pipes.

[0003] When conducting hydrostatic or burst tests, the test standards require maintaining a constant temperature environment, typically by completely immersing the sample in constant-temperature water at a specified temperature. Thermostatic chambers used to maintain this constant water temperature are generally large, allowing for the simultaneous testing of multiple samples. In existing technologies, samples are placed in the thermostatic chamber primarily in two ways: horizontally and vertically. Vertical placement, compared to horizontal placement, facilitates the upward accumulation of air bubbles at the vent, ensuring thorough air removal from the system and thus obtaining accurate test results. Simultaneously, vertical placement saves space within the thermostatic chamber, allowing for the simultaneous placement of more samples within a single chamber unit. This is particularly suitable for testing long samples (vertical placement of long samples requires only a small amount of space within the thermostatic chamber).

[0004] However, the vertical placement method also has obvious drawbacks: in order to completely immerse the sample in water, even if only one pipe is being tested, the water in the constant temperature chamber must be added up to the level of the submerged pipe. This means that the constant temperature chamber needs to be filled with far more water than the horizontal placement method. This not only causes a large waste of water resources, but also requires more energy to heat the water to the specified temperature and maintain the constant temperature, which significantly increases the testing cost and energy consumption. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a testing device for the production and processing of CPVC (chlorinated polyvinyl chloride) pipes, which can significantly save water resources and energy consumption.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a testing device for the production and processing of CPVC (chlorinated polyvinyl chloride) pipes, comprising a hydrostatic / burst testing machine body with a constant temperature chamber, wherein multiple independent mounting chambers are provided inside the hydrostatic / burst testing machine body for vertically placing CPVC pipe samples to be tested; both ends of the sample are provided with sealing clamps; a mounting pressure connection structure is fixedly connected to the outer wall of the sealing clamp located above the sample; a circulation pump is fixedly connected to the inner wall of the hydrostatic / burst testing machine body, and the output end of the circulation pump is connected to a main pipe; a branch pipe is connected to the side wall of each mounting chamber, and the other end of all branch pipes is connected to the main pipe; a cavity is opened inside the mounting chamber, and a communication control component for controlling the water inlet of the chamber is provided inside the cavity.

[0007] Preferably, the sealing clamp includes a fixed clamp consisting of two clamps, a plug ring, and a conical ring; the two fixed clamps are fixedly clamped to the outer wall of the sample by a first bolt and a first nut; the conical ring is sleeved on the outer wall of the sample inside the fixed clamp, and one end of the conical ring is inserted into the plug ring; a second nut is threaded onto one side wall of the fixed clamp, one end of the second nut passes through the fixed clamp and abuts against the conical ring, and the conical ring can be moved axially by rotating the second nut, thereby achieving radial compression sealing.

[0008] Preferably, the pressure-adjusting connection structure includes a mounting plate; one end of the plug ring is connected to a connecting pipe and an exhaust pipe; the mounting plate is fixedly sleeved on the outer wall of the connecting pipe, and the side wall of the mounting plate has a through hole for the exhaust pipe to pass through; one end of the exhaust pipe passes through the mounting plate and extends above it, and a sealing plug is threaded to the top of the exhaust pipe; a control valve is fixedly connected to one end of the connecting pipe, and a hose is fixedly connected to the other end of the control valve; the outer wall of the hydrostatic / burst testing machine body has a pressure-adjusting interface hole that can be sealed with the hose.

[0009] Preferably, the communication control component includes a partition plate that is slidably and sealingly connected to the inner wall of the cavity, and a guide hole is provided on one side wall of the partition plate; a groove is provided on the upper surface of the supporting box, and a pressure block and a spring are provided in the groove; a connecting rod is fixedly connected to one end of the partition plate, and one end of the connecting rod passes through the wall of the supporting box and the spring and is fixedly connected to the pressure block; when the supporting plate is correctly covered on the supporting box, the supporting plate presses down on the pressure block, and then pushes the partition plate down through the connecting rod, so that the guide hole on the partition plate is precisely aligned and connected with the outlet of the branch pipe.

[0010] Preferably, the inner wall of the supporting box is fixedly connected to a mesh plate for support, and a one-way membrane is provided above the mesh plate. One side wall of the one-way membrane is fixedly connected to the inner wall of the supporting box to form a structure similar to a one-way valve, which only allows water to flow from the bottom to the top and prevents water from flowing back.

[0011] Preferably, the connection point between the hose and the circular hole on the main body of the hydrostatic / burst testing machine is provided with a plug for sealing the circular hole when not in use.

[0012] Preferably, the outer wall of the conical ring is fixedly connected with a soft sleeve to enhance the sealing effect.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Significantly saves water and energy consumption: This invention uses multiple independent mounting chambers, each equipped with an on-demand water injection mechanism controlled by a interconnected control component. The water inlet channel of each chamber automatically opens only when the mounting plate is correctly closed, allowing water to be injected into that chamber until the sample is submerged, unlike traditional constant temperature chambers which require filling the entire large chamber. Because the cross-sectional area of ​​the mounting chamber is much smaller than the entire constant temperature chamber, and the water level only needs to submerge the sample, water consumption is reduced. Simultaneously, the amount of water requiring heating is significantly reduced, consequently decreasing the electrical or steam energy consumption for heating, thus significantly lowering testing costs and meeting the requirements of green manufacturing and energy conservation.

[0014] 2. Precise water level control with anti-backflow function ensures high test reliability. This invention features a unique communication control component. The weight of the mounting plate presses down on the pressure block and spring, driving the partition to move and precisely align the guide hole with the branch pipe for communication. When the mounting plate is removed, the spring automatically resets, and the guide hole and branch pipe close, preventing water leakage due to misoperation. More importantly, a mesh plate and one-way membrane are installed on the inner wall of the mounting chamber. The one-way membrane only allows water to enter the sample area from the bottom upwards, preventing backflow. Even if the circulation pump unexpectedly stops or the main pipeline loses pressure, the one-way membrane will immediately close, firmly maintaining a constant water level inside the mounting chamber. This ensures the sample is always in a completely submerged, constant-temperature environment, greatly improving the success rate of the test and the accuracy of the data.

[0015] 3. Modular design, high testing efficiency, and flexible independent control: Multiple small mounting boxes can independently hold samples, and a unified constant temperature water supply is provided through a circulating pump and main pipeline system, which not only ensures temperature consistency but also enables parallel or time-sharing testing of multiple sets of samples, greatly improving testing efficiency and meeting the sampling inspection needs in batch production; When testing a single sample, the circulating pump only needs to pump water into one of the mounting boxes being tested, raising the water level in that box, so that the warm water completely covers the pipeline. Only a small amount of water is needed in the constant temperature chamber, and the device can be used, thereby reducing water consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 for Figure 2 Enlarged structural diagram at point C; Figure 6 is a partial structural schematic diagram of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point D; Figure 8 This is a partial schematic diagram of the two structures of the present invention; Figure 9 for Figure 8 Enlarged structural diagram at point E; Figure 10 This is a schematic diagram of the circulating pump structure of the present invention.

[0017] In the diagram: 1. Main body of the hydrostatic / burst testing machine; 2. Erecting box; 3. Connecting rod; 4. Mesh plate; 5. Circulating pump; 6. Main pipe; 7. Branch pipe; 8. Cavity; 9. One-way membrane; 10. Fixing clamp; 11. Plug ring; 12. Conical ring; 13. First bolt; 14. First nut; 15. Soft sleeve; 16. Second nut; 17. Erecting plate; 18. Connecting pipe; 19. Exhaust pipe; 20. Sealing plug; 21. Control valve; 22. Hoses; 23. Partition plate; 24. Guide hole; 25. Pressure block; 26. Spring; 27. Perforation. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0020] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0022] Please see Figures 1 to 10 A testing device for the production and processing of CPVC (chlorinated polyvinyl chloride) pipes includes a hydrostatic / burst testing machine body 1 with a constant temperature chamber. Multiple small mounting chambers 2 are installed inside the hydrostatic / burst testing machine body 1. Samples are placed inside the small mounting chambers 2, and sealing clamps are installed at both ends of the samples. A mounting pressure connection structure is fixedly connected to the outer wall of the upper sealing clamp. A circulation pump 5 is fixedly connected to the inner wall of the hydrostatic / burst testing machine body 1, and the output end of the circulation pump 5 is connected to a main pipe 6. Branch pipes 7 are connected to the side walls of the small mounting chambers 2, and one end of the branch pipe 7 is connected to the main pipe 6. A cavity 8 is opened inside the small mounting chambers 2, and a communication control component is installed inside the cavity 8.

[0023] As can be seen from the above structure: Before testing, sealing clamps are installed at both ends of the CPVC pipe sample, and the upper sealing clamp is fixed to the pressure-supporting connection structure. The sample is placed vertically into the supporting small box 2. At this time, the pressure-supporting connection structure triggers the communication control component, opening the channel between the branch pipe 7 and the supporting small box 2. The circulation pump 5 is started, and constant temperature water is distributed through the main pipe 6 to each branch pipe 7, and then enters the supporting small box 2, with the liquid level rising until the sample is completely submerged. Since the volume of each supporting small box 2 is much smaller than the entire constant temperature chamber, the water consumption and heating energy consumption are greatly reduced. The circulation pump 5 works continuously to keep the water circulating and maintain a uniform water temperature. Subsequently, hydrostatic pressure or burst pressure is applied to the inside of the sample through the pressure-supporting connection structure to complete the test. By setting up multiple independent supporting small boxes 2 in conjunction with the circulation pump 5, main pipe 6, branch pipe 7 and communication control component, on-demand water filling and independent temperature control of each supporting small box 2 are achieved. Compared with traditional integrated constant temperature chambers, only the small box 2 needs to be filled to submerge the sample, which reduces water consumption and significantly reduces heating energy consumption, thus solving the problem of water and energy waste when the sample is placed vertically.

[0024] Furthermore, the sealing clamp includes a fixing clamp 10 consisting of two clamps, a plug ring 11, and a conical ring 12; the two fixing clamps 10 are fixed to the outer wall of the sample by a first bolt 13 and a first nut 14; the conical ring 12 is fitted inside the fixing clamp 10 on the outer wall of the sample, with one end of the conical ring 12 inserted into the plug ring 11; a second nut 16 is threaded onto one side wall of the fixing clamp 10, and one end of the second nut 16 passes through the fixing clamp 10 and abuts against the conical ring 12; when installing the sealing clamp, first, the soft sleeve 15 is fitted onto the outer wall of the conical ring 12, then the conical ring 12 is fitted onto the end of the sample, and then the plug ring 11 is fitted onto the outside of the conical ring 12, with one end inserted into the plug ring 11. The two semi-circular fixing clamps 10 (clamps) are closed to enclose the plug ring 11 and the conical ring 12, and locked by the first bolt 13 and the first nut 14, so that the fixing clamp 10 is tightly clamped onto the outer wall of the sample. Subsequently, rotating the second nut 16 (which is threaded to the side wall of the fixing clamp 10 and whose inner end abuts against the stepped surface of the conical ring 12) pushes the conical ring 12 towards the center of the sample. The conical surface of the conical ring 12 slides relative to the conical surface of the plug ring 11, converting the axial force into radial compressive force. This compresses the soft sleeve 15, causing elastic deformation, thus tightly fitting the outer wall of the sample and the inner wall of the plug ring 11, forming a highly reliable seal. The interaction between the conical surface of the conical ring 12 and the inner conical surface of the plug ring 11 generates radial compressive force, tightening the seal and achieving a seal at the end of the sample. Reversing the rotation of the second nut 16 releases the seal.

[0025] Furthermore, the pressurized connection structure includes a mounting plate 17; one end of the plug ring 11 is connected to a connecting pipe 18 and an exhaust pipe 19; the mounting plate 17 is fixedly sleeved on the outer wall of the connecting pipe 18, and a through hole 27 is opened on the side wall of the mounting plate 17; one end of the exhaust pipe 19 passes through the mounting plate 17 and extends to the top of the mounting plate 17, and a sealing plug 20 is threadedly connected to one end of the exhaust pipe 19 located above the mounting plate 17; a control valve 21 is fixedly connected to one end of the connecting pipe 18, and a hose 22 is fixedly connected to one end of the control valve 21; a round hole that can be connected to the hose 22 is opened on the outer wall of the hydrostatic / burst testing machine body 1; the mounting plate 17 is fixedly connected to the upper sealing clamp and covers the upper opening of the mounting box 2. The lower end of the exhaust pipe 19 connects to the highest point inside the sample, and the upper end passes through the perforation 27 of the mounting plate 17 and extends out. When water is injected, the sealing plug 20 is opened, and the air inside the sample gathers upward under water pressure and is discharged from the exhaust pipe 19, ensuring that there are no residual air bubbles in the system. After venting, the sealing plug 20 is tightened. The connecting pipe 18 connects to the inside of the sample and is connected to the round hole on the outer wall of the hydrostatic / burst testing machine body 1 in sequence via the control valve 21 and the hose 22. After opening the control valve 21, the testing machine can apply the set hydrostatic pressure or burst pressure to the inside of the sample for testing.

[0026] Furthermore, the communication control component includes a partition 23 that is slidably connected to the inner wall of the cavity 8, and a guide hole 24 is provided on one side wall of the partition 23; a groove is provided on the upper surface of the supporting box 2, and a pressure block 25 and a spring 26 are provided in the groove; a connecting rod 3 is fixedly connected to one end of the partition 23, and one end of the connecting rod 3 passes through the supporting box 2 and the spring 26 and is fixedly connected to the pressure block 25; when the supporting plate 17 covers the supporting box 2, the supporting plate 17 presses the pressure block 25, the connecting rod 3 and the partition 23, so that the guide hole 24 on the partition 23 communicates with the branch pipe 7; when no sample is placed, the spring 26 pushes the pressure block 25 upward, and the connecting rod 3 drives the partition 23 to the upper position, the guide hole 24 is misaligned with the branch pipe 7, and the branch pipe 7 is closed. When the mounting plate 17 is placed on the mounting box 2, it presses down on the pressure block 25, compressing the spring 26. This, along with the connecting rod 3, pushes the partition 23 downwards until the guide hole 24 aligns with the branch pipe 7, allowing water to enter the mounting box 2. After the test, the mounting plate 17 is removed, the spring 26 returns to its original position, the partition 23 moves upwards, and the guide hole 24 and branch pipe 7 are misaligned again, automatically closing the water inlet channel.

[0027] This interconnection control component enables intelligent control of "automatic water injection for sampling and automatic water shut-off for sampling," eliminating the need for additional electrical or manual valve operation. The spring 26 reset mechanism ensures that branch pipe 7 is normally closed when not in use, preventing water overflow or waste due to misoperation.

[0028] Furthermore, a mesh plate 4 is fixedly connected to the inner wall of the small mounting box 2, and a one-way membrane 9 is installed above the mesh plate 4. One side wall of the one-way membrane 9 is fixed to the inner wall of the small mounting box 2. The mesh plate 4 is fixed to the inner wall of the small mounting box 2, located above the water inlet of the branch pipe 7, and is used to support the one-way membrane 9. One side of the one-way membrane 9 is fixed, while the rest is free, similar to a one-way valve. When the circulating pump 5 is working normally, water impacts the one-way membrane 9 from the bottom upwards, causing its free end to rise upwards, and the water smoothly passes through the mesh plate 4 into the sample area. When the circulating pump 5 malfunctions or loses pressure, the gravity of the water column above generates downward pressure, pressing the one-way membrane 9 tightly onto the mesh plate 4 to form a seal, preventing water from flowing back down to the branch pipe 7, thereby maintaining a constant water level in the small mounting box 2 and ensuring that the sample is always submerged.

[0029] Furthermore, a plug-sealed circular hole is provided at the connection point between the hose 22 and the main body 1 of the hydrostatic / burst testing machine; the circular hole on the outer wall of the main body 1 of the hydrostatic / burst testing machine is used to connect the hose 22. When not in use, the circular hole is sealed with a plug to prevent impurities from entering or pressure medium from leaking. During testing, the plug is removed, and the end of the hose 22 is reliably connected to the circular hole. The pressurization system of the testing machine can then apply pressure to the inside of the sample through the circular hole, hose 22, control valve 21, and connecting pipe 18. After testing, the control valve 21 is closed, the hose 22 is removed, and the circular hole is resealed with a plug for future use.

[0030] Furthermore, a flexible sleeve 15 is fixedly connected to the outer wall of the conical ring 12; the flexible sleeve 15, typically made of rubber or elastic plastic, is fixedly connected to the outer wall of the conical ring 12. When the second nut 16 is rotated to push the conical ring 12 to move axially, the conical surface of the conical ring 12 and the inner conical surface of the plug ring 11 press against each other, and the resulting axial force is converted into radial compressive force, which acts on the flexible sleeve 15. The flexible sleeve 15 undergoes elastic deformation, its inner wall tightly adhering to the outer wall of the sample, and its outer wall tightly adhering to the inner wall of the plug ring 11, forming two reliable sealing interfaces.

[0031] In this invention, firstly, sealing clamps are installed at both ends of the CPVC pipe sample to be tested. Specifically, a conical ring 12 is fitted onto the outer wall of the sample end, and then a plug ring 11 is fitted on top, so that one end of the conical ring 12 is inserted into the plug ring 11. Then, a fixing clamp 10 composed of two clamps is wrapped around the outside of the plug ring 11 and the conical ring 12, and the first bolt 13 and the first nut 14 are tightened, so that the fixing clamp 10 is tightly clamped to the outer wall of the sample. Next, the second nut 16 is rotated to push the conical ring 12 to move axially. The soft sleeve 15 fixedly connected to the outer wall of the conical ring 12 is elastically deformed after radial compression, tightly fitting the outer wall of the sample and the inner wall of the plug ring 11, completing the end seal. Subsequently, one of the plugs is removed, and a hose 22 is connected to the main body 1 of the hydrostatic / burst testing machine through a round hole. The assembled sample is vertically placed into a small mounting box 2 inside the main body 1 of the hydrostatic / burst testing machine, so that the mounting plate 17 covers the upper opening of the small mounting box 2. At this time, the mounting plate 17 presses down on the pressure block 25 set in the groove on the upper surface of the small mounting box 2, compressing the spring 26, and pushing the partition plate 23 to slide downward in the cavity 8 through the connecting rod 3, so that the guide hole 24 opened on one side wall of the partition plate 23 is aligned and connected with the branch pipe 7. The circulation pump 5, which is fixedly connected to the inner wall of the main body 1 of the hydrostatic / burst testing machine, is started. Constant temperature water enters the main pipe 6 from the output end of the circulation pump 5, and then flows into the small mounting box 2 through the branch pipe 7 connected to the main pipe 6 and the guide hole 24. As water flows from bottom to top through the mesh plate 4 fixedly connected to the inner wall of the small box 2, it breaks through the one-way membrane 9 set above the mesh plate 4 and fixed to the inner wall of the small box 2 on one side, and enters the sample area. The liquid level gradually rises until it completely submerges the sample. After the water level rises to a certain level, the water in the small box 2 flows back into the constant temperature chamber in the main body 1 of the hydrostatic / burst test machine through the perforation 27, completing the circulation of hot water and maintaining a constant temperature. During the water injection process, open the sealing plug 20 at the upper end of the exhaust pipe 19 and start the hydrostatic / burst test machine body 1, so that the hydrostatic / burst test machine body 1 injects the pressurized medium into the sample through the hose 22, etc., so that the air in the sample gathers upward under the pressure of the medium and is discharged from the exhaust pipe 19. After the air is discharged, tighten the sealing plug 20 to ensure that there are no air bubbles left in the system. Subsequently, the main body 1 of the hydrostatic / burst testing machine applies the set hydrostatic or burst pressure to the inside of the sample through the hose 22 and connecting pipe 18, performs testing, and records the data. After the test is completed, the control valve 21 is closed to release the pressure, the hose 22 is removed, and the round hole is resealed with a plug. The mounting plate 17 and the sample are taken out from the mounting box 2. At this time, the spring 26 returns to its original position, pushing the pressure block 25, connecting rod 3, and partition 23 upward. The guide hole 24 is misaligned with the branch pipe 7, and the water inlet channel is automatically closed in preparation for the next use.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended technical solutions and their equivalents.

Claims

1. A testing device for the production and processing of CPVC (chlorinated polyvinyl chloride) pipes, comprising a hydrostatic / burst testing machine body (1) with a constant temperature chamber, characterized in that: The main body (1) of the hydrostatic / burst testing machine is provided with multiple small mounting boxes (2), the specimen is placed in the small mounting box (2), and both ends of the specimen are provided with sealing clamps; the outer wall of the sealing clamp located above is fixedly connected to the mounting pressure connection structure; the inner wall of the main body (1) of the hydrostatic / burst testing machine is fixedly connected to a circulation pump (5), and the output end of the circulation pump (5) is connected to a main pipe (6); the side wall of the small mounting box (2) is connected to a branch pipe (7), and one end of the branch pipe (7) is connected to the main pipe (6); the interior of the small mounting box (2) is provided with a cavity (8), and a communication control component is provided in the cavity (8).

2. The testing device for the production and processing of CPVC chlorinated polyvinyl chloride pipes according to claim 1, characterized in that: The sealing clamp includes a fixed clamp (10) consisting of two clamps, a plug ring (11) and a conical ring (12); the two fixed clamps (10) are fixed to the outer wall of the sample by a first bolt (13) and a first nut (14); the conical ring (12) is sleeved on the outer wall of the sample inside the fixed clamp (10), and one end of the conical ring (12) is inserted into the plug ring (11); a second nut (16) is threaded to one side wall of the fixed clamp (10), and one end of the second nut (16) passes through the fixed clamp (10) and abuts against the conical ring (12).

3. The testing device for the production and processing of CPVC chlorinated polyvinyl chloride pipes according to claim 1, characterized in that: The pressure connection structure includes a mounting plate (17); one end of the plug ring (11) is connected to a connecting pipe (18) and an exhaust pipe (19); the outer wall of the connecting pipe (18) is fixedly fitted with the mounting plate (17), and the side wall of the mounting plate (17) is provided with a perforation (27); one end of the exhaust pipe (19) passes through the mounting plate (17) and extends to the top of the mounting plate (17), and one end of the exhaust pipe (19) located above the mounting plate (17) is threaded with a sealing plug (20); one end of the connecting pipe (18) is fixedly connected with a control valve (21), and one end of the control valve (21) is fixedly connected with a hose (22), and the outer wall of the hydrostatic / burst test machine body (1) is provided with a round hole that can be connected to the hose (22).

4. The testing device for the production and processing of CPVC chlorinated polyvinyl chloride pipes according to claim 1, characterized in that: The communication control component includes a partition (23) that is slidably connected to the inner wall of the cavity (8), and a guide hole (24) is provided on one side wall of the partition (23); a groove is provided on the upper surface of the mounting box (2), and a pressure block (25) and a spring (26) are provided in the groove; a connecting rod (3) is fixedly connected to one end of the partition (23), and one end of the connecting rod (3) passes through the mounting box (2) and the spring (26) and is fixedly connected to the pressure block (25); when the mounting plate (17) covers the mounting box (2), the mounting plate (17) presses the pressure block (25), the connecting rod (3) and the partition (23), so that the guide hole (24) on the partition (23) is connected to the branch pipe (7).

5. The testing device for the production and processing of CPVC chlorinated polyvinyl chloride pipes according to claim 1, characterized in that: The inner wall of the small box (2) is fixedly connected with a mesh plate (4), and a one-way membrane (9) is provided above the mesh plate (4). One side wall of the one-way membrane (9) is fixed to the inner wall of the small box (2).

6. The testing device for the production and processing of CPVC chlorinated polyvinyl chloride pipes according to claim 3, characterized in that: The hose (22) is provided with a plug sealing hole at the connection between it and the main body (1) of the hydrostatic / burst test machine.

7. The testing device for the production and processing of CPVC chlorinated polyvinyl chloride pipes according to claim 2, characterized in that: The outer wall of the cone ring (12) is fixedly connected to a soft sleeve (15).

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