Fire-fighting semi-rigid hose bending pressure test device and use method

Abstract

This invention discloses a bending pressure testing device and method for semi-rigid fire hoses, relating to the technical field of fire protection product testing devices. The device includes: a workbench with a pressurizing assembly comprising an electrically controlled booster pump, a fixed pipe, and a reducing connector connected in sequence; the fixed pipe being fixed to the workbench and equipped with a pressure sensor; and the reducing connector connecting the fixed end of a semi-rigid hose sample; a binding assembly including self-locking binding tape with marking lines, the marking lines defining the inner bending diameter of the semi-rigid hose sample after binding; and a visual inspection assembly including an image recognition sensor positioned above the semi-rigid hose sample. This invention solves the problem of excessively tight or loose binding, replaces manual inspection for signs of bursting, leakage, or damage, eliminates safety hazards, and improves testing quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of fire protection product testing equipment technology, specifically to a bending pressure testing device for semi-rigid fire protection hoses and its usage method. Background Technology

[0002] Semi-rigid hoses used with fire pumps and fire trucks are characterized by their ability to maintain a stable circular cross-section even when not pressurized. These hoses are classified into 1.5MPa standard pressure type and 4.0MPa high pressure type based on their maximum working pressure, and can operate in ambient temperatures as low as -20℃. They are typically stored in coils for rapid deployment. In application scenarios, these hoses must maintain their cross-sectional shape at all times to prevent water flow obstruction due to flattening or twisting, thus ensuring the continuity and reliability of firefighting operations. Therefore, verifying their pressure-bearing capacity under bending conditions is a crucial step in ensuring product quality.

[0003] According to current standards and specifications, the bending pressure test of semi-rigid hoses should be performed as follows: cut a sample with a length of 2m, first raise the internal water pressure to 0.07MPa, then bend the sample 180° in the middle section to form a sharp bend, then raise the pressure to its rated maximum working pressure within 60s, and hold the pressure for 1min to confirm that the sample has no bursting, leakage or structural damage before it is qualified.

[0004] However, existing testing methods suffer from insurmountable technical bottlenecks: First, in the bending and fixing stage, the lack of standardized binding mechanisms makes it impossible to precisely control the binding force, easily leading to situations where the constraint is too tight, restricting the normal deformation of the sample, or too loose, causing the bending angle to fail to meet the standard, seriously affecting the validity of the test data; Second, in the pressure holding and monitoring stage, the reliance on visual means to judge the state of the sample is limited by the human eye's ability to distinguish and subjective judgment, making it difficult to accurately capture minute leaks or hidden damage, and unable to avoid the instantaneous safety risks caused by high-pressure bursts; In addition, existing fluid transport pipeline testing devices are mostly designed for static pressure testing of straight sections, lacking the structural foundation to adapt to the 180° sharp bend forming and fixing of semi-rigid hoses, and thus failing to meet the specific testing needs of this type of product. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a bending pressure testing device and method for fire-fighting semi-rigid hoses, which solves the problem of excessively tight or loose binding, replaces manual inspection for signs of bursting, leakage or damage, eliminates potential safety hazards, and improves the quality and efficiency of the test.

[0006] The technical solution of the present invention is as follows: In a first aspect of the invention, a bending pressure testing apparatus for a semi-rigid fire hose is provided, comprising: A workbench is provided with a pressurizing assembly, which includes an electrically controlled booster pump, a fixed pipe, and a reducing connector connected in sequence. The fixed pipe is fixed to the workbench and is equipped with a pressure sensor. The reducing connector is used to connect the fixed end of a semi-rigid flexible tube sample. The binding assembly includes a self-locking binding tape with a marking line for defining the inner bending diameter of the semi-rigid flexible tube sample after binding; The visual inspection component includes an image recognition sensor disposed above the semi-rigid flexible tube sample; The PLC controller is electrically connected to the electrically controlled booster pump, the pressure sensor, and the image recognition sensor, respectively. The PLC controller has a built-in test control program and an image analysis module.

[0007] In some embodiments of the present invention, the fixed pipe is further provided with an electrically controlled exhaust valve, which is located at the highest point of the fixed pipe wall and is electrically connected to the PLC controller.

[0008] In some embodiments of the present invention, the distance between the marking line and the self-locking strap buckle is equal to the sum of the outer diameter and circumference of the semi-rigid flexible tube sample.

[0009] In some embodiments of the present invention, the fixed pipe is fixedly connected to the workbench surface by bolts, and the reducing connector is detachably connected to the water outlet end of the fixed pipe by bolts. Replacing the reducing connector with different specifications can adapt to semi-rigid hose samples with different pipe diameters.

[0010] In some embodiments of the present invention, the fixed pipe is fixedly connected to the workbench surface by bolts, and the reducing connector is detachably connected to the water outlet end of the fixed pipe by bolts. Different specifications of reducing connectors can be replaced to adapt to semi-rigid hose samples with different pipe diameters.

[0011] In some embodiments of the present invention, the PLC controller is configured to perform the following operations: The booster pump is controlled to raise the water pressure inside the sample to a preset first stable pressure, and the electrically controlled exhaust valve is controlled to close. After receiving the signal that the bending and bundling is complete, the booster pump is controlled to raise the water pressure to the rated working pressure and maintain the pressure within a set time. The image analysis module processes the image data acquired by the image recognition sensor to determine whether the sample has defects.

[0012] In some embodiments of the present invention, the test control program of the PLC controller has two types of pressure thresholds for semi-rigid hoses: the rated working pressure of type I hose is 1.5 MPa, and the rated working pressure of type II hose is 4.0 MPa.

[0013] In a second aspect of the invention, a method of using a semi-rigid fire hose bending pressure testing device is provided, comprising the following steps: S1. Input the type and outer diameter information of the semi-rigid flexible tube sample into the PLC controller. The PLC controller automatically calculates the position of the marking line of the strapping and marks the corresponding position on the strapping. S2. Fix the 2m long semi-rigid hose sample to the water outlet end of the fixed pipe through the reducing joint, and seal the free end of the sample. S3. Start the electronically controlled booster pump to raise the water pressure to 0.07MPa, then purge the air from the sample through the electronically controlled exhaust valve, and then maintain a stable pressure of 0.07MPa. S4. Bend the middle section of the sample 180° so that the free end is close to the fixed end. Use a binding strap with marked lines to evenly bind the sample in the bending area. When binding, align the marked lines of all the binding straps to form a sharp bend. S5. Trigger the pressure boosting command. The PLC controller controls the electronically controlled booster pump to increase the pressure inside the sample to the rated working pressure of the corresponding category within 60 seconds and maintain the pressure for 1 minute. S6. During the pressure holding period, the AI ​​image recognition sensor continuously collects images of the sample. The PLC controller automatically determines whether the sample has cracks, leaks, or damage defects through the built-in image analysis software, and outputs the test results.

[0014] In some embodiments of the present invention, in step S4, five straps are evenly distributed to bind the bending area, and the spacing between adjacent straps is consistent.

[0015] In some embodiments of the present invention, if the pressure sensor B detects that the pressure is lower than the rated working pressure threshold in step S5, the PLC controller automatically adjusts the electronically controlled booster pump to supplement the pressure and maintain pressure stability.

[0016] One or more technical solutions of the present invention have the following beneficial effects: (1) This invention is specifically adapted to the special working conditions of semi-rigid hoses, which require "pressure-free shape preservation and 180° sharp bend pressure bearing". It breaks through the structural limitations of existing test devices that are only adapted to the gentle bending and straight static pressure of flexible parts. Through a special bending and fixing structure, it ensures the standardization and fixing stability of sharp bend forming from a physical level, fills the technical gap of special test equipment for this type of product, and provides a standardized and reproducible special implementation carrier for the bending pressure performance test of semi-rigid hoses. It completely solves the common industry pain point that existing equipment has no adaptable structural foundation.

[0017] (2) This invention achieves quantitative control of bending binding force by setting a self-locking strap with a preset marking line and utilizing the specific distance relationship between the marking line and the strap buckle (equal to the sum of the outer diameter and circumference of the sample). This structure avoids the dependence on the operator's feel in traditional tests, ensuring the standardization of the 180° bending angle and reserving reasonable deformation space. It avoids limiting the sample's pressure expansion due to excessive binding or causing bending failure due to excessive looseness, significantly improving the consistency of test conditions and the accuracy of data results.

[0018] (3) This invention introduces an image recognition sensor and a control component with built-in analysis algorithms to construct an intelligent visual inspection system. By acquiring sample images in real time during the pressure holding stage, mature machine vision algorithms are used to automatically identify bursts, leaks, and surface damage, replacing traditional manual visual inspection. This not only eliminates the risk of subjective human error and missed detection of minor defects, but also fundamentally avoids the potential safety threat to personnel from high-pressure bursts, realizing the objectification and automation of the test judgment process, and significantly improving detection efficiency and intrinsic safety level. Attached Figure Description

[0019] Figure 1 This is a front view of the fire-fighting semi-rigid hose bending pressure testing device of the present invention; Figure 2 This is a top view of the fire-fighting semi-rigid hose bending pressure testing device of the present invention; Figure 3 This is a schematic diagram of the fixed length of the strapping strap of the present invention; Figure 4 This is the electrical control schematic diagram of the present invention; In the diagram: 1. Water storage tank; 2. Pipe A; 3. Ground; 4. Electrically controlled booster pump; 5. Pressure sensor A; 6. Workbench; 7. Pipe B; 8. Solenoid valve; 9. Electrically controlled exhaust valve; 10. Pressure sensor B; 11. Fixed pipe; 12. Reducing joint; 13. Semi-rigid flexible hose sample; 14. PLC controller; 15. AI image recognition sensor; 16. Upright pole; 17. Sealing component; 18. Tabletop; 19. Self-locking stainless steel strapping; 20. Sharp bend; 21. Marking line; 22. Horizontal bar; 23. Marking line position dimension; 24. Total length; 25. Locking buckle. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Example 1 In a typical embodiment of the present invention, a bending pressure testing device for semi-rigid fire hoses is provided, comprising: a workbench, on which a pressurizing assembly is provided, the pressurizing assembly including an electrically controlled booster pump, a fixed pipe, and a reducing connector connected in sequence; the fixed pipe being fixed to the workbench surface by bolts, and a pressure sensor for real-time monitoring of internal water pressure is provided on the fixed pipe; the reducing connector is used to connect the fixed end of the semi-rigid hose sample, and different diameter samples can be adapted by replacing different specifications of reducing connectors, thereby achieving the versatility of the device; and a binding assembly including self-locking binding straps with marking lines. The marking lines are used to precisely define the inner bending diameter of the semi-rigid flexible tube sample after bundling, ensuring the standardization and consistency of the bending radius; the visual inspection component includes an image recognition sensor located above the semi-rigid flexible tube sample, used to continuously acquire high-definition images of the sample surface during the test; the PLC controller is electrically connected to the booster pump, the pressure sensor and the image recognition sensor, forming the core control system of the device. The PLC controller has a built-in preset test control program and an image analysis module for analyzing image data, so as to realize the automated control of the test process and the intelligent identification of defects.

[0023] In this embodiment, the fixed tube is also equipped with an electrically controlled exhaust valve. The electrically controlled exhaust valve is located at the highest point of the fixed tube wall and is used to efficiently remove residual air from the pipeline and sample in the early stage of the test. It is also electrically connected to the PLC controller to realize automatic control of the exhaust process.

[0024] In this embodiment, the distance between the marking line and the self-locking strap buckle is precisely calculated, and its value is equal to the sum of the outer diameter and circumference of the semi-rigid flexible tube sample. This design ensures that a standardized bending radius can be formed after binding, meeting the test specification requirements.

[0025] In this embodiment, the fixed pipe is firmly fixed to the workbench surface by bolts, and the reducing connector is also detachably connected to the water outlet end of the fixed pipe by bolts. This modular design makes it easy to replace reducing connectors of different specifications, thereby flexibly adapting to semi-rigid hose samples of different pipe diameters.

[0026] In this embodiment, the fixed pipe is securely connected to the workbench surface by bolts, and the reducing connector is detachably connected to the water outlet of the fixed pipe by bolts. By replacing the reducing connectors of different specifications, the device can be adapted to semi-rigid hose samples of different pipe diameters, thereby improving the applicability and testing flexibility of the device.

[0027] In this embodiment, the PLC controller is configured to perform the following operations: First, control the booster pump to raise the water pressure inside the sample to a preset first stable pressure and control the electrically controlled exhaust valve to close, completing the preparation for exhaust and pressure stabilization; Second, after receiving the signal that bending and binding is complete, control the booster pump to steadily raise the water pressure to the rated working pressure within a set time and maintain the pressure stable; Finally, process the image data collected by the image recognition sensor in real time through the image analysis module to automatically determine whether the sample has burst, leaked or other damage defects during the pressure holding period.

[0028] Furthermore, the test control program of the PLC controller has two types of pressure thresholds pre-stored for semi-rigid hoses: the rated working pressure of type I hoses is 1.5MPa, and the rated working pressure of type II hoses is 4.0MPa. The controller can automatically call the corresponding pressure parameters for testing according to the input sample type.

[0029] Specifically, such as Figure 1 and Figure 2As shown, an electrically controlled booster pump 4 and a workbench 6 are placed on the ground 3. The electrically controlled booster pump 4 is equipped with a pressure sensor A5. The water supply of the electrically controlled booster pump 4 is connected to the water storage tank 1 through pipe A2. The water outlet of the electrically controlled booster pump 4 is connected to the solenoid valve 8 through pipe B7. The solenoid valve 8 is installed at the left end of the fixed pipe 11. An electrically controlled exhaust valve 9 and a pressure sensor B10 are installed at the highest point of the pipe wall of the fixed pipe 11. The fixed pipe 11 is fixed to the table surface 18 of the workbench 6 by bolts. The right end of the fixed pipe 11 is bolted with a reducing connector 12. The right end of the reducing connector 12 is connected to a semi-rigid hose sample 13. By replacing the reducing connector 12 with different specifications, semi-rigid hose samples 13 with different pipe diameters can be installed. The free end of the semi-rigid hose sample 13 is sealed with a sealing piece 17. A vertical support rod 16 is bolted to the edge of the tabletop 18. A display PLC controller 14 is bolted to the support rod 16. A horizontal rod 22 is welded to the top of the support rod 16. An AI image recognition sensor 15 is bolted to the cantilever end of the horizontal rod 22. The AI ​​image recognition sensor 15 is located above the semi-rigid flexible tube sample 13. Instead of using long ropes to bind the semi-rigid flexible tube sample 13, coated self-locking stainless steel strapping 19 is used for binding. The coated self-locking stainless steel strapping 19 is 16mm wide, 1.5mm thick, and has a total length 24 equal to A + 60mm of the marking line position dimension 23. The value of A in the marking line position dimension 23 is the outer diameter + circumference of the semi-rigid flexible tube sample 13. Marking lines 21 are drawn on the five coated self-locking stainless steel strapping 19. Figure 4 As shown, the electrical control wires of the electric booster pump 4, pressure sensors A5 and B10, solenoid valve 8, electric exhaust valve 9, and AI image recognition sensor 15 are all connected to the display PLC controller 14 via wired or wireless connection, and the control program and image analysis software are input to the display PLC controller 14.

[0030] The specific usage method is as follows: Input the type and actual outer diameter information of the semi-rigid flexible tube sample 13 into the PLC controller 14 to determine the total length 24 of the coated self-locking stainless steel strapping 19. Draw marking lines 21 on the five coated self-locking stainless steel strapping 19 (see appendix). Figure 3The position of the marking line 21, from the lock 25 to the right, is the value A of the marking line position dimension 23, where A is the outer diameter + circumference of the semi-rigid hose sample 13. The 2m long semi-rigid hose sample 13 is installed on the reducer 12, and the sealing piece 17 is installed on the free end of the semi-rigid hose sample 13. The test start button in the display PLC controller 14 is pressed, and all electrical control components enter the working state. The electrically controlled booster pump 4 operates, drawing water from the water tank 1 through pipe A2, pipe B7, solenoid valve 8, fixed pipe 11, and reducer 12 into the semi-rigid hose sample 13. The water pushes the air inside the semi-rigid hose sample 13 to the electrically controlled exhaust valve 9. When all the air is discharged from the electrically controlled exhaust valve 9, the display PLC controller 14 controls the electrically controlled exhaust valve 9 to close. When the pressure value transmitted from the pressure sensor B10 to the display PLC controller 14 reaches 0.07MPa, the display PLC controller 14 controls the electrically controlled booster pump 4 to maintain this pressure value (see attached figure). Figure 1 A 2m long semi-rigid flexible tube sample 13 is bent approximately 180° at its midpoint, with its free end as close as possible to the fixed end. It is then evenly bound with coated self-locking stainless steel strapping 19, starting from the combined free and fixed ends. After binding, the marking lines 21 on each strap 19 stop at the same position, creating a sharp bend 20 at the fold of the semi-rigid flexible tube sample 13 (see Appendix). Figure 2 Then press the category pressure button on the PLC controller 14 (Class I: maximum working pressure of type A and type B hoses 1.5MPa, Class II: maximum working pressure of type A, type B and type C hoses 4.0MPa). The PLC controller 14 will control the electronically controlled booster pump 4 to increase the pressure from 0.07MPa to the maximum working pressure value of the hose category within 60 seconds, and maintain this pressure value for 1 minute. The PLC controller 14 will automatically determine whether there are signs of bursting, leakage or damage in the semi-rigid hose sample 13 before the pressure is released, based on the image transmitted by the AI ​​image recognition sensor 15.

[0031] It should be noted that the AI ​​image recognition sensor 15 in this embodiment can be implemented using mature industrial vision inspection devices in the field. Those skilled in the art can select a suitable CMOS / CCD industrial camera according to the detection requirements of the test scenario, and with the ring LED supplementary light source, clear image acquisition of the bending area of ​​the semi-rigid hose can be completed. Typical selection parameters are a resolution of not less than 5 million pixels and a frame rate of not less than 30fps. Alternatively, an intelligent industrial camera with integrated image processing function can be directly selected. Its image analysis algorithm can call known algorithms such as edge detection, texture comparison, and feature matching that are already available in public vision libraries such as OpenCV. Only conventional parameter adaptation is needed for the conventional color and surface braided texture features of the semi-rigid hose coating to achieve automatic identification of bursting, leakage, and structural damage in the bending area.

[0032] Example 2 This embodiment provides a method for using a semi-rigid fire hose bending pressure testing device, including the following steps: S1. Input the key information such as the type and outer diameter of the semi-rigid flexible tube sample into the PLC controller. The PLC controller automatically calculates the position of the marking line of the strapping tape according to the built-in algorithm and marks the corresponding position on the strapping tape to prepare for subsequent standardized strapping. S2. Securely fix the 2m long semi-rigid hose sample to the outlet end of the fixed pipe using a reducing connector, and seal the free end of the sample to ensure a good seal at the connection. S3. Start the electronically controlled booster pump to raise the system water pressure to 0.07MPa, then purge the air from the sample and pipeline through the electronically controlled exhaust valve, and then maintain a stable pressure of 0.07MPa to prepare for the formal test. S4. Bend the middle section of the sample 180° so that its free end is close to the fixed end. Use pre-marked strapping to evenly distribute and strap the sample in the bending area. When strapping, ensure that the marking lines of all straps are precisely aligned to form a standardized sharp bend. S5. Trigger the pressure boosting command. The PLC controller then controls the electronically controlled booster pump to steadily increase the pressure inside the sample to the rated working pressure of the corresponding category within 60 seconds, and maintain the pressure for 1 minute. S6. During the pressure holding period, the AI ​​image recognition sensor continuously collects images of the sample surface. The PLC controller automatically processes and analyzes the images through the built-in image analysis software, intelligently determines whether the sample has defects such as cracking, leakage or damage, and finally outputs the test results.

[0033] In this embodiment, step S4 specifically uses 5 straps to evenly distribute and bind the bending area, and the spacing between adjacent straps is consistent to ensure that the bending force is uniform and meets the standard test conditions.

[0034] In this embodiment, if the pressure sensor detects that the pressure is lower than the preset rated working pressure threshold in step S5, the PLC controller will automatically adjust the electronically controlled booster pump to provide real-time pressure replenishment in order to maintain the stability and accuracy of the pressure throughout the pressure holding stage.

[0035] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A bending pressure testing device for semi-rigid fire hoses, characterized in that, include: A workbench is provided with a pressurizing assembly, which includes an electrically controlled booster pump, a fixed pipe, and a reducing connector connected in sequence. The fixed pipe is fixed to the workbench and is equipped with a pressure sensor. The reducing connector is used to connect the fixed end of a semi-rigid flexible tube sample. The binding assembly includes a self-locking binding tape with a marking line for defining the inner bending diameter of the semi-rigid flexible tube sample after binding; The visual inspection component includes an image recognition sensor disposed above the semi-rigid flexible tube sample; The PLC controller is electrically connected to the electrically controlled booster pump, the pressure sensor, and the image recognition sensor, respectively. The PLC controller has a built-in test control program and an image analysis module.

2. The fire-fighting semi-rigid hose bending pressure testing device as described in claim 1, characterized in that, The fixed pipe is also equipped with an electrically controlled exhaust valve, which is located at the highest point of the fixed pipe wall and is electrically connected to the PLC controller.

3. The fire-fighting semi-rigid hose bending pressure testing device as described in claim 1, characterized in that, The distance between the marking line and the self-locking strap buckle is equal to the sum of the outer diameter and circumference of the semi-rigid flexible tube sample.

4. The fire-fighting semi-rigid hose bending pressure testing device as described in claim 1, characterized in that, The fixed pipe is fixedly connected to the workbench surface by bolts, and the reducing connector is detachably connected to the water outlet end of the fixed pipe by bolts. By replacing the reducing connector with different specifications, it can be adapted to semi-rigid hose samples with different pipe diameters.

5. The fire-fighting semi-rigid hose bending pressure testing device as described in claim 1, characterized in that, The fixed pipe is fixedly connected to the workbench surface by bolts, and the reducing connector is detachably connected to the water outlet end of the fixed pipe by bolts. Different specifications of reducing connectors can be replaced to adapt to semi-rigid hose samples with different pipe diameters.

6. The fire-fighting semi-rigid hose bending pressure testing device as described in claim 1, characterized in that, The PLC controller is configured to perform the following operations: The booster pump is controlled to raise the water pressure inside the sample to a preset first stable pressure, and the electrically controlled exhaust valve is controlled to close. After receiving the signal that the bending and bundling is complete, the booster pump is controlled to raise the water pressure to the rated working pressure and maintain the pressure within a set time. The image analysis module processes the image data acquired by the image recognition sensor to determine whether the sample has defects.

7. The fire-fighting semi-rigid hose bending pressure testing device as described in claim 1, characterized in that, The test control program of the PLC controller has two types of pressure thresholds pre-stored for semi-rigid hoses: the rated working pressure of type I hose is 1.5MPa, and the rated working pressure of type II hose is 4.0MPa.

8. A method of using the fire-fighting semi-rigid hose bending pressure testing device as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Input the type and outer diameter information of the semi-rigid flexible tube sample into the PLC controller. The PLC controller automatically calculates the position of the marking line of the strapping and marks the corresponding position on the strapping. S2. Fix the 2m long semi-rigid hose sample to the water outlet end of the fixed pipe through the reducing joint, and seal the free end of the sample. S3. Start the electronically controlled booster pump to raise the water pressure to 0.07MPa, then purge the air from the sample through the electronically controlled exhaust valve, and then maintain a stable pressure of 0.07MPa. S4. Bend the middle section of the sample 180° so that the free end is close to the fixed end. Use a binding strap with marked lines to evenly bind the sample in the bending area. When binding, align the marked lines of all the binding straps to form a sharp bend. S5. Trigger the pressure boosting command. The PLC controller controls the electronically controlled booster pump to increase the pressure inside the sample to the rated working pressure of the corresponding category within 60 seconds and maintain the pressure for 1 minute. S6. During the pressure holding period, the AI ​​image recognition sensor continuously collects images of the sample. The PLC controller automatically determines whether the sample has cracks, leaks, or damage defects through the built-in image analysis software, and outputs the test results.

9. The method of using the anti-bending pressure testing device for semi-rigid hoses as described in claim 8, characterized in that, In step S4, five straps are evenly distributed to bind the bent area, with the spacing between adjacent straps being consistent.

10. The method of using the anti-bending pressure testing device for semi-rigid hoses as described in claim 8, characterized in that, If pressure sensor B detects that the pressure is lower than the rated working pressure threshold in step S5, the PLC controller will automatically adjust the electronically controlled booster pump to replenish the pressure and maintain pressure stability.

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