Gas and liquid balloon pressure testing system

Abstract

A gas and liquid balloon pressure test system disclosed by the present invention comprises a main tester, a water tank, an air pump, a diameter measurement tool and a balloon test piece, the water tank, the air pump and the diameter measurement tool are all located on the outer side of the main tester, the balloon test piece is positioned on the diameter measurement tool, a touch control screen is arranged on the side wall of the main tester, and the touch control screen is arranged on the side wall of the main tester. A water path system, a positive pressure gas path system, a negative pressure gas path system and a PLC main control unit electrically connected with the touch control screen are arranged in the main tester, and the water tank is communicated with the water path system under the control of the PLC main control unit and is connected to the balloon test piece through a water path system pipeline; the air pump is communicated with the positive pressure air path system under the control of the PLC main control unit and is connected to the balloon test piece through a pipeline of the positive pressure air path system, and the negative pressure air path system is communicated with the balloon test piece under the control of the PLC main control unit. The device has the beneficial effect that the purpose of improving the operation convenience is achieved.

Description

Technical Field

[0001] This invention relates to the field of balloon testing technology, and in particular to a gas and liquid balloon pressure testing system. Background Technology

[0002] Balloon catheters are widely used to treat diseases within the body. For example, in treating arterial stenosis, a catheter with an inflatable balloon at the end is used. Doctors guide the balloon catheter into the blood vessel using fluoroscopy, locate the lesion, and then inflate the balloon by applying pressure with fluid to achieve the therapeutic goal. Another example is the use of flexible balloons for ablating cardiac tissue, which employ gas-inflated balloons for treatment.

[0003] To ensure the quality of balloons, balloons typically need to undergo a series of performance tests, including burst tests, fatigue tests, hydrostatic tests, compliance tests, and negative pressure tests. Since the tests for different products vary, such as compliance tests after inflation and compliance tests after water filling, which involve two completely different testing logics and need to be conducted through water and air systems respectively, current technologies usually require different testing equipment for testing. This is inconvenient to operate and also does not save costs. Summary of the Invention

[0004] The present invention aims to overcome the inconvenience of balloon testing in the prior art and provides a gas and liquid balloon pressure testing system that improves the ease of operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A gas and liquid balloon pressure testing system includes a main testing instrument, a water tank, an air pump, a diameter measuring fixture, and a balloon test piece. The water tank, air pump, and diameter measuring fixture are all located outside the main testing instrument. The balloon test piece is positioned on the diameter measuring fixture. A touch control screen is provided on the side wall of the main testing instrument. The main testing instrument contains a water circuit system, a positive pressure air circuit system, a negative pressure air circuit system, and a PLC main control unit electrically connected to the touch control screen. Under the control of the PLC main control unit, the water tank is connected to the water circuit system and connected to the balloon test piece through water circuit system pipelines. Under the control of the PLC main control unit, the air pump is connected to the positive pressure air circuit system and connected to the balloon test piece through positive pressure air circuit system pipelines. The negative pressure air circuit system is connected to the balloon test piece under the control of the PLC main control unit.

[0006] The water tank, air pump, and diameter measuring fixture are all located on the outside of the main testing instrument. The balloon test piece is positioned on the diameter measuring fixture. A touch control screen is provided on the side wall of the main testing instrument. The main testing instrument contains a water system, a positive pressure air system, a negative pressure air system, and a PLC main control unit electrically connected to the touch control screen. Under the control of the PLC main control unit, the water tank is connected to the water system and connected to the balloon test piece through the water system pipeline. Under the control of the PLC main control unit, the air pump is connected to the positive pressure air system and connected to the balloon test piece through the positive pressure air system pipeline. The negative pressure air system is connected to the balloon test piece under the control of the PLC main control unit. The system employs a PLC main control unit, enabling precise flow rate adjustment within the range of 0.1~2.0cc / s. It also features PID control to ensure the stability and repeatability of pressure control. This technology is existing and will not be elaborated upon here. The water tank, under the control of the PLC main control unit, is connected to the water system and, through pipelines, to the balloon test piece for water injection. This allows for burst testing, fatigue testing, water pressure leakage testing, and water pressure compliance testing. The air pump, under the control of the PLC main control unit, operates with a positive pressure air pump... The system is connected to the balloon test piece via a positive pressure air supply system. By outputting a set pressure to the balloon test piece, it facilitates pressure compliance testing, etc. The negative pressure air supply system, under the control of the PLC main control unit, is connected to the balloon test piece, facilitating negative pressure testing, etc. This system integrates the water supply system, positive pressure air supply system, and negative pressure air supply system into the same testing equipment, enabling multiple tests on the balloon test piece, thereby improving operational convenience, increasing testing efficiency, and saving costs.

[0007] Preferably, the water system includes an electric cylinder, a water pressure cylinder, an inlet solenoid valve, a three-way valve, and a water pressure sensor. All components are detachably connected to the main testing instrument. The water pressure cylinder has a piston rod, and the electric cylinder, under the control of the PLC main control unit, drives the piston rod to extend and retract relative to the interior of the water pressure cylinder. The inlet solenoid valve, three-way valve, and water pressure sensor are all electrically connected to the PLC main control unit. The main testing instrument has a water pressure interface and a water inlet on its front and rear sides, respectively. The water tank is connected to the inlet solenoid valve pipeline through the water inlet. The inlet solenoid valve is connected to the interior of the water pressure cylinder and the water pressure interface pipeline through the three-way valve. The water pressure interface is connected to the balloon test piece pipeline. The water pressure sensor pipeline is connected between the three-way valve and the water pressure interface, and all three are connected in series. When water needs to be injected into the balloon test piece for testing, the PLC main control unit controls the water inlet solenoid valve to open and controls the three-way valve to operate, connecting the valve port connected to the water inlet solenoid valve and the valve port connected to the inside of the water pressure cylinder. Then, the PLC main control unit controls the electric cylinder to drive the piston rod to slide, so that the water in the water tank flows sequentially through the water inlet solenoid valve and the three-way valve into the inside of the water pressure cylinder. When the PLC main control unit controls the water inlet solenoid valve to close and controls the three-way valve to switch its working state, connecting the valve port connected to the inside of the water pressure cylinder and the valve port connected to the water pressure interface, the PLC main control unit controls the electric cylinder to drive the piston rod to slide in the opposite direction, so that the water in the water pressure cylinder flows sequentially through the three-way valve, the water pressure sensor, and the water pressure interface into the balloon test piece and pressurizes it according to the set injection rate. This structure can be used for automated testing such as burst testing, fatigue testing, water pressure leakage testing, and water pressure compliance testing. It is easy to operate and improves testing accuracy.

[0008] Preferably, the main testing instrument includes a lever rotatably connected to it. The electric cylinder and the hydraulic cylinder are parallel to each other. Both ends of the lever are rotatably connected to the telescopic end of the electric cylinder and one end of the piston rod on the hydraulic cylinder, respectively. The other end of the piston rod is fixed with a piston block that passes through the end of the hydraulic cylinder and is located inside it. The piston block is in close contact with the inner wall of the hydraulic cylinder and slides with it under the drive of the electric cylinder. Both the electric cylinder and the hydraulic cylinder are existing technologies, so their structures will not be described in detail. When the PLC main control unit controls the extension and retraction of the electric cylinder, the piston rod extends and retracts in the opposite direction under the rotation of the lever, thereby realizing the process of water tank filling the hydraulic cylinder and the water flow from the hydraulic cylinder into the balloon test piece. Therefore, under the control of the PLC main control unit, the coordinated operation of the electric cylinder and the hydraulic cylinder achieves automated water pressure testing, which is easy to operate and improves testing accuracy.

[0009] Preferably, one end of the hydraulic cylinder is close to the lever and has a flexible connecting pipe on its side wall. The flexible connecting pipe and the piston rod are both located at the same end of the hydraulic cylinder. The three-way valve is connected to the interior of the hydraulic cylinder through the flexible connecting pipe. The other end of the hydraulic cylinder is away from the lever and has a spare water pipe on its side wall. One end of the spare water pipe is connected to the interior of the hydraulic cylinder, and the other end of the spare water pipe passes through the side wall of the main tester and is located outside the main tester. The flexible connecting pipe and the spare water pipe are located on the left and right sides of the piston block, respectively. When the PLC main control unit controls the electric cylinder to extend, the piston rod retracts into the hydraulic cylinder under the rotation of the lever, and the piston block gradually slides towards the end of the hydraulic cylinder where the spare water pipe is located. A negative pressure is formed inside the hydraulic cylinder near the lever, thereby realizing the injection of water from the water tank into the hydraulic cylinder. At the same time, in order to prevent water leakage due to the fit gap between the piston block and the side wall of the hydraulic cylinder, which would cause liquid to accumulate inside the hydraulic cylinder away from the lever, the accumulated liquid is discharged from the main tester through the spare water pipe as the piston block slides. Conversely, when the PLC main control unit controls the electric cylinder to retract, the piston rod extends outward from the hydraulic cylinder under the rotation of the lever, and the piston block gradually slides towards the end of the hydraulic cylinder near the lever, thereby realizing the injection of water from the hydraulic cylinder into the balloon test piece.

[0010] Preferably, the positive pressure air circuit system includes a positive pressure electro-proportional valve. The main testing instrument has a positive pressure interface and an air inlet on its front and rear sides, respectively. The air pump is connected to the air inlet pipeline and, under the control of the PLC main control unit, is connected to the positive pressure interface via the positive pressure electro-proportional valve. The positive pressure interface is connected to the balloon test piece pipeline. Under the control of the PLC main control unit, the air pump outputs compressed air, which enters the positive pressure electro-proportional valve. After outputting the set pressure, the compressed air is injected into the balloon test piece for relevant tests, realizing automated air pressure testing, simplifying operation, and improving testing accuracy.

[0011] Preferably, the negative pressure gas path system includes a vacuum pump, a vacuum solenoid valve, and a negative pressure electro-proportional valve. All three components are detachably connected to the main testing instrument. The main testing instrument has a negative pressure interface on its front side. Under the control of the PLC main control unit, the vacuum pump connects to the negative pressure interface sequentially through the vacuum solenoid valve and the negative pressure electro-proportional valve. The negative pressure interface is connected to the tubing of the balloon test piece. Under the control of the PLC main control unit, the vacuum pump generates negative pressure, and the negative pressure power is controlled through the vacuum solenoid valve and the negative pressure electro-proportional valve, achieving automated negative pressure testing, simplifying operation, and improving testing accuracy.

[0012] Preferably, the main testing instrument includes an upper housing and a lower housing, which are detachably connected and isolated from each other. The touch control screen is located on the front of the upper housing, and the PLC main control unit is located inside the upper housing. The water system, positive pressure air system, and negative pressure air system are all detachably connected to the interior of the lower housing. Besides integrating the PLC main control unit, water system, positive pressure air system, and negative pressure air system into one housing, this invention can also be designed as a two-layer structure. The water pressure interface, positive pressure interface, and negative pressure interface are all located on the front of the lower housing, while the water inlet and air outlet are located on the rear of the lower housing. The upper housing typically has wiring holes to facilitate circuit connection between the PLC main control unit inside the upper housing and the electrical components inside the lower housing. Additionally, the testing instrument has an external power cord. These technical means are all existing technologies and will not be elaborated upon here.

[0013] Preferably, the rear side of the upper housing is hinged to the rear side of the lower housing. Locking hooks are fixed to both sides of the upper housing, and locking buckles matching the corresponding locking hooks are fixed to both sides of the lower housing. A gas spring is installed inside the lower housing. The cylinder of the gas spring is hinged to the left or right side of the lower housing and close to the front side of the lower housing. The extension end of the gas spring is hinged to the upper housing and away from the front side of the lower housing. The structure of the locking buckles and hooks is existing technology and will not be described in detail here. Since a PLC main control unit is installed inside the upper housing, the gas spring facilitates easy opening of the upper housing by the operator, making it convenient for the inspection and maintenance of internal components.

[0014] Preferably, the water tank is placed at a height greater than the main testing instrument to facilitate stable water pressure.

[0015] Preferably, the diameter measuring fixture includes a hot water tank, in which an angle frame is placed. A support frame and a placement platform for fixing the balloon test piece are detachably mounted on the angle frame. The support frame is suspended above the angle frame, and the placement platform is located at the bottom of the support frame. The top of the support frame has an XZ axis seat and a rectangular hole parallel to the X-axis. The XZ axis seat is located on the side of the rectangular hole and has several high-precision displacement gauges distributed along the X-axis and penetrating the rectangular hole. The high-precision displacement gauges are electrically connected to the PLC main control unit. The high-precision displacement gauges are slidably connected to the XZ axis seat along the X-axis and Z-axis respectively. The high-precision displacement gauges and the placement platform are vertically aligned. A thermocouple temperature controller is placed in the hot water tank and is electrically connected to the PLC main control unit. The hot water tank is existing technology, so its structure will not be described in detail. In this system, it is used to simulate the human body temperature environment. When conducting water pressure or air pressure compliance tests, the operator fixes the balloon test piece on the placement platform and places the angle frame in the hot water tank, so that the test part of the balloon test piece is immersed in the warm water. A high-precision displacement gauge with a micro-measuring force of 0.7N, a resolution of 0.1μm, and a range of 12mm is selected. Several high-precision displacement gauges are moved to appropriate test positions through the XZ axis seats, and the volume change of the test part of the balloon test piece under different pressure values ​​is recorded in real time. This realizes the automated compliance test of the balloon test piece, which is easy to operate and improves the test accuracy. Moreover, by controlling the displacement of the tooling and using the size sample block, the range can be increased, and the acquisition range of balloon size change can be maintained at >11mm, with a resolution of 0.1μm and an accuracy of ≥1μm.

[0016] Preferably, the top of the angle frame is inclined, and the height of the angle frame gradually decreases from its left end to its right end. This allows the test portion of the balloon test piece to be submerged in the water while the end of the balloon test piece that connects to the pipeline is placed outside the water, facilitating operation.

[0017] Preferably, the bottom of the placement platform is detachably and fixedly connected to the angle frame. The top of the placement platform has a U-shaped groove with both ends open to the outside. The length direction of the U-shaped groove is parallel to the X-axis. The U-shaped groove has two pressure blocks, one and two, distributed left and right. Both pressure blocks are slidably connected to the U-shaped groove. The center of pressure block one has several insertion holes that match one end of the balloon test piece. The top of pressure block two has a U-shaped slot that corresponds to the insertion holes. The U-shaped slot matches the other end of the balloon test piece. The side wall of the U-shaped groove has a rectangular hole two that is parallel to the X-axis. The side walls of pressure block one and pressure block two have threaded holes that correspond to and communicate with the rectangular hole two. The rectangular hole two has two locking screws that match the threaded holes on pressure block one and pressure block two, respectively. Both pressure block one and pressure block two can slide along the U-shaped groove and be locked in place by locking screws, thus achieving position adjustment of pressure block one and pressure block two; the front end of the balloon test piece is effectively fixed by the U-shaped slot on pressure block two, and the rear end of the balloon test piece is fixed by the insertion hole on pressure block one, making it easier for the balloon test piece to be parallel to the placement platform, thereby achieving fixation of the balloon test piece by pressure block one and pressure block two, which is simple to operate.

[0018] Preferably, the XZ axis support includes a vertical plate, with a rectangular hole located on the front side of the vertical plate. A lead screw motor is detachably fixed to the center of the rear side of the vertical plate. The lead screw motor is electrically connected to the PLC main control unit. A crossbar is detachably fixed to the output end of the lead screw motor. The crossbar is slidably connected to the vertical plate along the Z-axis under the drive of the lead screw motor. Rectangular sliding holes parallel to the Z-axis are provided on both the left and right sides of the vertical plate. Two support plates are vertically mounted on the crossbar, each passing through the rectangular sliding holes on the left and right sides of the vertical plate. One end of each support plate is fixedly connected to the crossbar, and a slide rail parallel to the X-axis is fixed to the other end of each support plate. A slider matching the slide rail is detachably installed on the high-precision displacement gauge. The PLC main control unit controls the lead screw motor to adjust the Z-axis position of the high-precision displacement gauge. Simultaneously, by moving the slider, the X-axis position of the high-precision displacement gauge can be adjusted, allowing the high-precision displacement gauge to accurately move to the required test position, thus improving test accuracy.

[0019] The beneficial effects of this invention are: 1. This system integrates the water system, positive pressure air system and negative pressure air system into the same testing equipment, which can perform multiple tests on balloon test pieces, thereby improving the ease of operation, increasing testing efficiency and saving costs; 2. Under the control of the PLC main control unit, it is easy to realize the automated testing of balloon test pieces, the operation is simple, and it is conducive to improving the testing accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 yes Figure 1 Schematic diagram of the internal structure of the testing instrument; Figure 3 yes Figure 1 Rear view of the testing instrument; Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 5 yes Figure 4 Internal structure diagram of the lower and middle boxes; Figure 6 yes Figure 4 Rear view of the testing instrument; Figure 7 This is a schematic diagram of the diameter measuring tool. Figure 8 This is a structural diagram of the angle frame; Figure 9 yes Figure 1 Physical product display image; Figure 10 yes Figure 4 A physical display image showing the device connected to the caliper measuring tool; Figure 11 This is a physical diagram showing the connection between the testing instrument and the water tank; Figure 12 This is a physical diagram showing the connection between the testing instrument and the air pump; Figure 13 This is a photograph showing the internal structure of the hydraulic cylinder. Figure 14 yes Figure 1 A physical display image showing the device connected to the caliper measuring tool; Figure 15 and Figure 16 These are all actual photos of the angle bracket.

[0021] In the diagram: 1. Main testing instrument, 2. Water tank, 3. Air pump, 4. Diameter measuring fixture, 5. Upper housing, 6. Lower housing, 7. Touch control screen, 8. Water system, 9. Positive pressure air system, 10. Negative pressure air system, 11. Electric cylinder, 12. Hydraulic cylinder, 13. Inlet solenoid valve, 14. Three-way valve, 15. Water pressure sensor, 16. Piston rod, 17. Water pressure interface, 18. Water inlet, 19. Lever, 20. Flexible connecting pipe, 21. Backup water pipe, 22. Positive pressure interface, 23. Air outlet, 24. Vacuum pump, 25. Vacuum solenoid valve, 26. Negative pressure electro-proportional valve, 27. Negative pressure interface, 28. Locking hook, 29. Locking buckle, 30. Gas spring, 31. Hot water tank, 32. Angle bracket, 33. 34. Support frame, 35. Placement platform, 36. XZ axis seat, 37. Rectangular hole one, 38. High-precision displacement gauge, 39. U-shaped groove, 40. Pressure block one, 41. Pressure block two, 42. Insertion hole, 43. U-shaped slot, 44. Rectangular hole two, 45. Locking screw, 46. Vertical plate, 47. Lead screw motor, 48. Crossbar, 49. Rectangular sliding hole, 50. Support plate, 51. Slide rail, 52. Slider, 53. PLC main control unit. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] 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 exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. 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.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0026] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 14In the embodiments described, a gas and liquid balloon pressure testing system includes a main testing instrument 1, a water tank 2, an air pump 3, a diameter measuring fixture 4, and a balloon test piece. The water tank 2, air pump 3, and diameter measuring fixture 4 are all located outside the main testing instrument 1. The balloon test piece is positioned on the diameter measuring fixture 4. A touch control screen 7 is provided on the side wall of the main testing instrument 1. The main testing instrument 1 contains a water circuit system 8, a positive pressure air circuit system 9, a negative pressure air circuit system 10, and a PLC main control unit 52 electrically connected to the touch control screen 7. Under the control of the PLC main control unit 52, the water tank 2 is connected to the water circuit system 8 and connected to the balloon test piece through the water circuit system 8 pipeline. Under the control of the PLC main control unit 52, the air pump 3 is connected to the positive pressure air circuit system 9 and connected to the balloon test piece through the positive pressure air circuit system 9 pipeline. The negative pressure air circuit system 10 is connected to the balloon test piece under the control of the PLC main control unit 52.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the water system 8 includes an electric cylinder 11, a water pressure cylinder 12, an inlet solenoid valve 13, a three-way valve 14, and a water pressure sensor 15. The electric cylinder 11, water pressure cylinder 12, inlet solenoid valve 13, three-way valve 14, and water pressure sensor 15 are all detachably connected to the main testing instrument 1. The water pressure cylinder 12 is equipped with a piston rod 16. Under the control of the PLC main control unit 52, the electric cylinder 11 drives the piston rod 16 to extend and retract relative to the interior of the water pressure cylinder 12. The inlet solenoid valve 13 and the three-way valve 14... Both the water pressure sensor 15 and the main control unit 52 of the PLC are electrically connected. The front and rear sides of the main tester 1 are respectively provided with water pressure interface 17 and water inlet 18. The water tank 2 is connected to the water inlet solenoid valve 13 through the water inlet 18. The water inlet solenoid valve 13 is connected to the inside of the water pressure cylinder 12 and the water pressure interface 17 through the three-way valve 14. The water pressure interface 17 is connected to the balloon test piece. The water pressure sensor 15 is connected between the three-way valve 14 and the water pressure interface 17 and the three are connected in series.

[0028] like Figure 2 and Figure 5 As shown, the main testing instrument 1 is equipped with a lever 19, which is rotatably connected to the main testing instrument 1. The electric cylinder 11 and the hydraulic cylinder 12 are parallel to each other. The two ends of the lever 19 are rotatably connected to the extension end of the electric cylinder 11 and one end of the piston rod 16 on the hydraulic cylinder 12, respectively. Figure 13 As shown, a piston block is fixed to the other end of the piston rod 16 and passes through the end of the hydraulic cylinder 12 and is located inside the hydraulic cylinder 12. The piston block is in close contact with the inner wall of the hydraulic cylinder 12 and is slidably connected to the hydraulic cylinder 12 under the drive of the electric cylinder 11.

[0029] One end of the hydraulic cylinder 12 is close to the lever 19 and has a flexible connecting pipe 20 on its side wall. The flexible connecting pipe 20 and the piston rod 16 are both located at the same end of the hydraulic cylinder 12. The three-way valve 14 is connected to the inside of the hydraulic cylinder 12 through the flexible connecting pipe 20. The other end of the hydraulic cylinder 12 is away from the lever 19 and has a spare water pipe 21 on its side wall. One end of the spare water pipe 21 is connected to the inside of the hydraulic cylinder 12, and the other end of the spare water pipe 21 passes through the side wall of the main tester 1 and is located outside the main tester 1. The flexible connecting pipe 20 and the spare water pipe 21 are located on the left and right sides of the piston block, respectively.

[0030] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the positive pressure air circuit system 9 includes a positive pressure electro-proportional valve (not shown in the figure). The front and rear sides of the main test instrument 1 are respectively provided with a positive pressure interface 22 and an air inlet 23. After the air pump 3 is connected to the air inlet 23, it is connected to the positive pressure interface 22 through the positive pressure electro-proportional valve under the control of the PLC main control unit 52. The positive pressure interface 22 is connected to the balloon test piece pipeline.

[0031] like Figure 2 and Figure 5 As shown, the negative pressure gas path system 10 includes a vacuum pump 24, a vacuum solenoid valve 25, and a negative pressure electro-proportional valve 26. The vacuum pump 24, vacuum solenoid valve 25, and negative pressure electro-proportional valve 26 are all detachably connected to the main test instrument 1. The front side of the main test instrument 1 is provided with a negative pressure interface 27. Under the control of the PLC main control unit 52, the vacuum pump 24 passes through the vacuum solenoid valve 25 and the negative pressure electro-proportional valve 26 in sequence and then connects to the negative pressure interface 27. The negative pressure interface 27 is connected to the balloon test piece pipeline.

[0032] like Figure 4 As shown, the main tester 1 includes an upper housing 5 and a lower housing 6. The upper housing 5 and the lower housing 6 are detachably connected and isolated from each other. The touch control screen 7 is located on the front side of the upper housing 5. The PLC main control unit 52 is located inside the upper housing 5. The water circuit system 8, the positive pressure air circuit system 9 and the negative pressure air circuit system 10 are all detachably connected to the interior of the lower housing 6.

[0033] like Figure 5 and Figure 6 As shown, the rear side of the upper box 5 is hinged to the rear side of the lower box 6. Locking hooks 28 are fixed on both the left and right sides of the upper box 5. Locking buckles 29 that match the corresponding locking hooks 28 are fixed on both the left and right sides of the lower box 6. A gas spring 30 is provided inside the lower box 6. The cylinder of the gas spring 30 is hinged to the left or right side of the lower box 6 and close to the front side of the lower box 6. The extension end of the gas spring 30 is hinged to the upper box 5 and away from the front side of the lower box 6.

[0034] like Figure 1 and Figure 4As shown, the water tank 2 is placed at a greater height than the main tester 1.

[0035] like Figure 1 , Figure 4 , Figure 7 , Figure 15 and Figure 16 As shown, the diameter measuring fixture 4 includes a hot water tank 31, an angle frame 32 is placed inside the hot water tank 31, a support frame 33 and a placement platform 34 for fixing the balloon test piece are detachably installed on the angle frame 32, the support frame 33 is suspended on the angle frame 32, the placement platform 34 is located at the bottom of the support frame 33, the top of the support frame 33 is provided with an XZ axis seat 35 and a rectangular hole 36 parallel to the X-axis, the XZ axis seat 35 is located on the side of the rectangular hole 36 and is provided with several high-precision displacement gauges 37 distributed along the X-axis and able to pass through the rectangular hole 36, the high-precision displacement gauges 37 are electrically connected to the PLC main control unit 52, the high-precision displacement gauges 37 are slidably connected to the XZ axis seat 35 along the X-axis and Z-axis respectively, the high-precision displacement gauges 37 and the placement platform 34 are vertically aligned, a thermocouple temperature controller (not shown in the figure) is placed inside the hot water tank 31, the thermocouple temperature controller is electrically connected to the PLC main control unit 52.

[0036] like Figure 7 and Figure 15 As shown, the top of the angle bracket 32 ​​is inclined, and the height of the angle bracket 32 ​​gradually decreases from its left end to its right end.

[0037] like Figure 7 , Figure 8 , Figure 15 and Figure 16 As shown, the bottom of the placement platform 34 is detachably and fixedly connected to the angle frame 32. The top of the placement platform 34 has a U-shaped groove 38 with both ends open to the outside. The length direction of the U-shaped groove 38 is parallel to the X-axis. The U-shaped groove 38 has two pressure blocks 39 and 40 distributed left and right. Both pressure blocks 39 and 40 are slidably connected to the U-shaped groove 38. The center of pressure block 39 has several insertion holes 41 that match one end of the balloon test piece. The top of pressure block 40 has a U-shaped slot 42 that corresponds to the insertion holes 41. The U-shaped slot 42 matches the other end of the balloon test piece. The side wall of the U-shaped groove 38 has a rectangular hole 43 that is parallel to the X-axis. The side walls of pressure blocks 39 and 40 have threaded holes that correspond to and communicate with the rectangular hole 43. The rectangular hole 43 has two locking screws 44 that match the threaded holes on pressure blocks 39 and 40 respectively.

[0038] The XZ axis support 35 includes a vertical plate 45, a rectangular hole 36 located on the front side of the vertical plate 45, a lead screw motor 46 detachably fixed at the center of the rear side of the vertical plate 45, the lead screw motor 46 being electrically connected to the PLC main control unit 52, a crossbar 47 detachably fixed at the output end of the lead screw motor 46, the crossbar 47 being slidably connected to the vertical plate 45 along the Z-axis under the drive of the lead screw motor 46, rectangular sliding holes 48 parallel to the Z-axis being provided on both the left and right sides of the vertical plate 45, two support plates 49 being vertically provided on the crossbar 47, the two support plates 49 respectively passing through the rectangular sliding holes 48 on the left and right sides of the vertical plate 45, one end of the support plate 49 being fixedly connected to the crossbar 47, and a slide rail 50 parallel to the X-axis being fixed on the other end of the two support plates 49, and a slider 51 matching the slide rail 50 being detachably installed on the high-precision displacement gauge 37.

[0039] Example 1, Bursting Test: The PLC main control unit 52 controls the inlet solenoid valve 13 to open and controls the three-way valve 14 to work, so that the valve port connected to the inlet solenoid valve 13 and the valve port connected to the inside of the water pressure cylinder 12 are connected. Then, the PLC main control unit 52 controls the electric cylinder 11 to drive the piston rod 16 to move, so that the water in the water tank 2 flows through the inlet solenoid valve 13 and the three-way valve 14 in sequence and flows into the inside of the water pressure cylinder 12. The PLC main control unit 52 controls the inlet solenoid valve 13 to close and controls the three-way valve 14 to switch the working state, so that the valve port connected to the inside of the water pressure cylinder 12 and the valve port connected to the water pressure interface 17 are connected. Then, the PLC main control unit 52 controls the electric cylinder 11 to drive the piston rod 16 to move in the opposite direction, so that the water in the water pressure cylinder 12 flows through the three-way valve 14, the water pressure sensor 15 and the water pressure interface 17 in sequence into the balloon test piece and is injected and pressurized at the set pressing rate. Based on the different compliance of the balloon test pieces, select the appropriate stamping rate. The flow rate can be adjusted by the PLC main control unit 52. After adjusting the percentage position of PID intervention, conduct the test until the balloon bursts.

[0040] Example 2, fatigue test: The PLC main control unit 52 controls the water inlet solenoid valve 13 to open and controls the three-way valve 14 to work, so that the valve port connected to the water inlet solenoid valve 13 and the valve port connected to the inside of the water pressure cylinder 12 are connected. Then, the PLC main control unit 52 controls the electric cylinder 11 to drive the piston rod 16 to move, so that the water in the water tank 2 flows through the water inlet solenoid valve 13 and the three-way valve 14 in sequence and flows into the inside of the water pressure cylinder 12. The PLC main control unit 52 controls the water inlet solenoid valve 13 to close and controls the three-way valve 14 to switch the working state, so that the valve port connected to the inside of the water pressure cylinder 12 and the valve port connected to the water pressure interface 17 are connected. Then, the PLC main control unit 52 controls the electric cylinder 11 to drive the piston rod 16 to slide in the opposite direction, so that the water in the water pressure cylinder 12 flows through the three-way valve 14, the water pressure sensor 15 and the water pressure interface 17 in sequence into the balloon test piece and is injected and pressurized at the set pressing rate. Based on the different compliance of the balloon test pieces, select an appropriate stamping rate. The flow rate can be adjusted via the PLC main control unit 52. After adjusting the percentage position of PID intervention, conduct the test. After setting the target pressure, use the PLC's built-in timer to set and hold the pressure, then depressurize, repeating this cycle N times until the test ends.

[0041] Example 3, Water Pressure Leakage Test: The PLC main control unit 52 controls the inlet solenoid valve 13 to open and controls the three-way valve 14 to work, so that the valve port connected to the inlet solenoid valve 13 and the valve port connected to the inside of the water pressure cylinder 12 are connected. Then, the PLC main control unit 52 controls the electric cylinder 11 to drive the piston rod 16 to move, so that the water in the water tank 2 flows through the inlet solenoid valve 13 and the three-way valve 14 in sequence and flows into the inside of the water pressure cylinder 12. The PLC main control unit 52 controls the inlet solenoid valve 13 to close and controls the three-way valve 14 to switch the working state, so that the valve port connected to the inside of the water pressure cylinder 12 and the valve port connected to the water pressure interface 17 are connected. Then, the PLC main control unit 52 controls the electric cylinder 11 to drive the piston rod 16 to slide in the opposite direction, so that the water in the water pressure cylinder 12 flows through the three-way valve 14, the water pressure sensor 15 and the water pressure interface 17 in sequence into the balloon test piece and injects water and pressurizes it at the set pressing rate, and maintains it for the set time.

[0042] Example 4, Water Pressure Compliance Test: The PLC main control unit 52 controls the inlet solenoid valve 13 to open and controls the three-way valve 14 to work, so that the valve port connected to the inlet solenoid valve 13 and the valve port connected to the inside of the water pressure cylinder 12 are connected. Then, the electric cylinder 11 is controlled to drive the piston rod 16 to move, so that the water in the water tank 2 flows through the inlet solenoid valve 13 and the three-way valve 14 in sequence and then flows into the inside of the water pressure cylinder 12. The PLC main control unit 52 controls the inlet solenoid valve 13 to close and controls the three-way valve 14 to switch the working state, so that the valve port connected to the inside of the water pressure cylinder 12 and the valve port connected to the water pressure interface 17 are connected. Then, the electric cylinder 11 is controlled to drive the piston rod 16 to slide in the opposite direction, so that the water in the water pressure cylinder 12 flows through the three-way valve 14, the water pressure sensor 15 and the water pressure interface 17 in sequence into the balloon test piece and is pressurized by water injection at the set pressing rate. Based on the different compliance of the balloon test pieces, a suitable stamping rate is selected. The flow rate can be adjusted via the PLC main control unit 52, and the percentage position of PID intervention is adjusted before testing. After setting N target pressures, each target pressure is set and maintained via the timer built into the PLC main control unit 52, and the change in balloon volume is recorded in real time by a high-precision displacement gauge 37.

[0043] Example 5, air pressure compliance test: Under the control of the PLC main control unit 52, the compressed air output by the air pump 3 is connected to the positive pressure electric proportional valve to output the set pressure. After N target pressures are set, each target pressure is set and maintained by the timer built into the PLC main control unit 52, and the change in balloon volume is recorded in real time by the high-precision displacement meter 37.

[0044] Example 6, Negative Pressure Test: Under the control of the PLC main control unit 52, the vacuum pump 24 generates negative pressure, and the negative pressure power is controlled by the vacuum solenoid valve 25 and the negative pressure electro-proportional valve 26.

[0045] In Example 7, during compliance testing with water or air pressure, three high-precision displacement gauges 37 with micro-force are mounted on the slide rail 50. These gauges can be adjusted left and right on the slide rail 50, and the XZ-axis seat 35 can be operated to adjust the high-precision displacement gauges 37 to the appropriate position. Since the maximum range of the available high-precision displacement gauges 37 is 12mm, for balloons with a size greater than 12mm, a suitable gauge block can be selected to reset the displacement gauge data. For example, a 20mm gauge block, calibrated and confirmed, is placed on the placement platform. The XZ-axis seat 35 is then adjusted, and the three high-precision displacement gauges 37 are sequentially placed on the gauge block and fixed. After resetting the data, the gauge block is removed. This increases the range of the high-precision displacement gauges 37 by 20mm. Since the measurement of balloon size under different pressures is primarily for checking balloon compliance, the device design ensures that the measurement of balloon changes occurs within the range of the high-precision displacement gauges 37, thus guaranteeing the accuracy of balloon changes. Furthermore, through data acquisition by the PLC main control unit 52, a sampling frequency of 100Hz can be achieved.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas and liquid balloon pressure testing system, comprising a main testing instrument (1), a water tank (2), an air pump (3), a diameter measuring fixture (4), and a balloon testing piece, wherein the water tank (2), the air pump (3), and the diameter measuring fixture (4) are all located outside the main testing instrument (1), characterized in that, The balloon test piece is positioned on the diameter measuring fixture (4). The main test instrument (1) is equipped with a touch control screen (7) on its side wall. The main test instrument (1) is equipped with a water system (8), a positive pressure air system (9), a negative pressure air system (10), and a PLC main control unit (52) electrically connected to the touch control screen (7). The water tank (2) is connected to the water system (8) under the control of the PLC main control unit (52) and connected to the balloon test piece through the water system (8) pipeline. The air pump (3) is connected to the positive pressure air system (9) under the control of the PLC main control unit (52) and connected to the balloon test piece through the positive pressure air system (9) pipeline. The negative pressure air system (10) is connected to the balloon test piece under the control of the PLC main control unit (52).

2. The gas and liquid balloon pressure testing system according to claim 1, characterized in that, The water system (8) includes an electric cylinder (11), a water pressure cylinder (12), an inlet solenoid valve (13), a three-way valve (14), and a water pressure sensor (15). The electric cylinder (11), water pressure cylinder (12), inlet solenoid valve (13), three-way valve (14), and water pressure sensor (15) are all detachably connected to the main tester (1). The water pressure cylinder (12) is equipped with a piston rod (16). Under the control of the PLC main control unit (52), the electric cylinder (11) drives the piston rod (16) to perform telescopic movement relative to the inside of the water pressure cylinder (12). The inlet solenoid valve (13), three-way valve (14), and water pressure sensor (15) are all detachably connected to the main tester (1). 4) Both the water pressure sensor (15) and the main control unit (52) of the PLC are electrically connected. The main tester (1) has a water pressure interface (17) and a water inlet (18) on its front and rear sides respectively. The water tank (2) is connected to the water inlet solenoid valve (13) through the water inlet (18). The water inlet solenoid valve (13) is connected to the inside of the water pressure cylinder (12) and the water pressure interface (17) through the three-way valve (14). The water pressure interface (17) is connected to the balloon test piece. The water pressure sensor (15) is connected between the three-way valve (14) and the water pressure interface (17) and the three are connected in series.

3. The gas and liquid balloon pressure testing system according to claim 2, characterized in that, The main tester (1) is equipped with a lever (19), which is rotatably connected to the main tester (1). The electric cylinder (11) and the water pressure cylinder (12) are parallel to each other. The two ends of the lever (19) are rotatably connected to the telescopic end of the electric cylinder (11) and one end of the piston rod (16) on the water pressure cylinder (12), respectively. The other end of the piston rod (16) is fixed with a piston block and passes through the end of the water pressure cylinder (12) and is located inside the water pressure cylinder (12). The piston block is in close contact with the inner wall of the water pressure cylinder (12) and is slidably connected to the water pressure cylinder (12) under the drive of the electric cylinder (11).

4. The gas and liquid balloon pressure testing system according to claim 3, characterized in that, One end of the water pressure cylinder (12) is close to the lever (19) and a flexible connector (20) is provided on its side wall. The flexible connector (20) and the piston rod (16) are both located at the same end of the water pressure cylinder (12). The three-way valve (14) is connected to the inside of the water pressure cylinder (12) through the flexible connector (20). The other end of the water pressure cylinder (12) is far away from the lever (19) and a spare water pipe (21) is provided on its side wall. One end of the spare water pipe (21) is connected to the inside of the water pressure cylinder (12). The other end of the spare water pipe (21) passes through the side wall of the main tester (1) and is located outside the main tester (1). The flexible connector (20) and the spare water pipe (21) are located on the left and right sides of the piston block, respectively.

5. The gas and liquid balloon pressure testing system according to claim 1, characterized in that, The positive pressure air circuit system (9) includes a positive pressure electro-proportional valve. The front and rear sides of the main test instrument (1) are respectively provided with a positive pressure interface (22) and an air inlet (23). After the air pump (3) is connected to the air inlet (23) pipeline, it is connected to the positive pressure interface (22) through the positive pressure electro-proportional valve under the control of the PLC main control unit (52). The positive pressure interface (22) is connected to the balloon test piece pipeline.

6. The gas and liquid balloon pressure testing system according to claim 1, characterized in that, The negative pressure gas path system (10) includes a vacuum pump (24), a vacuum solenoid valve (25), and a negative pressure electro-proportional valve (26). The vacuum pump (24), vacuum solenoid valve (25), and negative pressure electro-proportional valve (26) are all detachably connected to the main test instrument (1). The front side of the main test instrument (1) is provided with a negative pressure interface (27). Under the control of the PLC main control unit (52), the vacuum pump (24) is connected to the negative pressure interface (27) after passing through the vacuum solenoid valve (25) and the negative pressure electro-proportional valve (26) in sequence. The negative pressure interface (27) is connected to the balloon test piece pipeline.

7. The gas and liquid balloon pressure testing system according to claim 1, characterized in that, The main tester (1) includes an upper housing (5) and a lower housing (6). The upper housing (5) and the lower housing (6) are detachably connected and isolated from each other. The touch control screen (7) is located on the front side of the upper housing (5). The PLC main control unit (52) is located inside the upper housing (5). The water system (8), the positive pressure air system (9) and the negative pressure air system (10) are all detachably connected to the interior of the lower housing (6).

8. The gas and liquid balloon pressure testing system according to claim 7, characterized in that, The rear side of the upper box (5) is hinged to the rear side of the lower box (6). The left and right sides of the upper box (5) are fixed with locking hooks (28). The left and right sides of the lower box (6) are fixed with locking buckles (29) that match the corresponding locking hooks (28). The lower box (6) is provided with a gas spring (30). The cylinder of the gas spring (30) is hinged to the left or right side of the lower box (6) and close to the front side of the lower box (6). The extension end of the gas spring (30) is hinged to the upper box (5) and away from the front side of the lower box (6).

9. A gas and liquid balloon pressure testing system according to claim 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that, The water tank (2) is placed at a height greater than the main test instrument (1).

10. A gas and liquid balloon pressure testing system according to claim 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that, The caliper (4) includes a hot water tank (31), in which an angle frame (32) is placed. A support frame (33) and a placement platform (34) for fixing the balloon test piece are detachably installed on the angle frame (32). The support frame (33) is suspended on the angle frame (32), and the placement platform (34) is located at the bottom of the support frame (33). The top of the support frame (33) is provided with an XZ shaft seat (35) and a rectangular hole (36) parallel to the X-axis. The XZ shaft seat (35) is located at the bottom of the rectangular hole (36). The side of the rectangular hole (36) is provided with several high-precision displacement gauges (37) distributed along the X-axis and able to pass through the rectangular hole (36). The high-precision displacement gauges (37) are electrically connected to the PLC main control unit (52). The high-precision displacement gauges (37) are slidably connected to the XZ axis seat (35) along the X-axis and Z-axis respectively. The high-precision displacement gauges (37) are vertically aligned with the placement platform (34). A thermocouple temperature controller is placed in the hot water tank (31). The thermocouple temperature controller is electrically connected to the PLC main control unit (52).

11. The gas and liquid balloon pressure testing system according to claim 10, characterized in that, The top of the angle bracket (32) is inclined, and the height of the angle bracket (32) gradually decreases from its left end to its right end.

12. The gas and liquid balloon pressure testing system according to claim 10, characterized in that, The bottom of the placement platform (34) is detachably and fixedly connected to the angle frame (32). The top of the placement platform (34) is provided with a U-shaped groove (38) that is open at both ends. The length direction of the U-shaped groove (38) is parallel to the X-axis. The U-shaped groove (38) is provided with a pressure block 1 (39) and a pressure block 2 (40) distributed from left to right. The pressure block 1 (39) and the pressure block 2 (40) are slidably connected to the U-shaped groove (38). The center of the pressure block 1 (39) is provided with several insertion holes (41) that match one end of the balloon test piece along its vertical direction. The top of the pressure block 2 (40) is provided with a U-shaped groove (42) that corresponds to the insertion hole (41) on the left and right. The U-shaped groove (42) matches the other end of the balloon test piece. The side wall of the U-shaped groove (38) is provided with a rectangular hole 2 (43) that is parallel to the X-axis. The side walls of the pressure block 1 (39) and the pressure block 2 (40) are provided with threaded holes that correspond to and communicate with the rectangular hole 2 (43). The rectangular hole 2 (43) is provided with two locking screws (44) that match the threaded holes on the pressure block 1 (39) and the pressure block 2 (40) respectively.

13. The gas and liquid balloon pressure testing system according to claim 10, characterized in that, The XZ axis seat (35) includes a vertical plate (45), the rectangular hole (36) is located on the front side of the vertical plate (45), and a lead screw motor (46) is detachably fixed to the center of the rear side of the vertical plate (45). The lead screw motor (46) is electrically connected to the PLC main control unit (52). A crossbar (47) is detachably fixed to the output end of the lead screw motor (46). The crossbar (47) is slidably connected to the vertical plate (45) along the Z-axis under the drive of the lead screw motor (46). The left and right sides of the vertical plate (45) Each is provided with a rectangular sliding hole (48) parallel to the Z-axis. Two support plates (49) are vertically provided on the crossbar (47). The two support plates (49) pass through the rectangular sliding holes (48) on the left and right sides of the vertical plate (45). One end of the support plate (49) is fixedly connected to the crossbar (47). The other end of the two support plates (49) is fixed with a slide rail (50) parallel to the X-axis. The high-precision displacement gauge (37) is detachably installed with a slider (51) matching the slide rail (50).

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