Pressure relief value intelligent detection equipment with step pressure regulating function for pressure reducing valve

Abstract

The invention discloses a pressure relief value intelligent detection device with a step pressure regulating function for a pressure reducing valve, and relates to the technical field of detection device.The detection device comprises a pressure reducing valve body, a simulation water supply mechanism, a drainage mechanism, a partial pressure regulating mechanism, a detection mechanism, a clamping mechanism and a rack; the drainage mechanism is communicated with the pressure reducing valve body, the partial pressure adjusting mechanism is communicated with the pressure reducing valve body, the detection mechanism is communicated with the valve body, the clamping mechanism is connected with the pressure reducing valve body in a clamping mode, and the simulation water supply mechanism, the drainage mechanism, the partial pressure adjusting mechanism, the detection mechanism and the clamping mechanism are all fixedly connected with the rack. A water inlet is in hard sealing connection with a butt joint assembly of the simulation water supply mechanism, a water outlet is in butt joint with a filter inlet of the drainage mechanism, the partial pressure adjusting mechanism is communicated with a valve body, and then the purpose of step pressure adjusting detection is achieved through the detection mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and specifically to an intelligent detection device for the pressure relief value of a pressure reducing valve with a stepwise pressure regulation function. Background Art

[0002] With the rapid development of industrial automation and intelligence, hydraulic and fluid control systems have been widely used in fields such as water treatment, building water supply, and industrial production. As a key regulating equipment among them, the pressure reducing valve plays a core role in ensuring the safety and stability of the system. The quality of the pressure reducing valve directly affects production efficiency, resource waste, and the economy and reliability of equipment operation. Therefore, the quality detection technology of the pressure reducing valve has become a research hotspot.

[0003] The traditional detection methods for the pressure relief value of the pressure reducing valve are mostly manual monitoring, which have problems such as manual errors, inconvenient operation, and long detection cycles.

[0004] Regarding the above-mentioned existing technologies, firstly, the hierarchical pressure regulation efficiency is low. The traditional manual regulation or single-point pressure regulation methods cannot achieve the automatic hierarchical release of pressure, with low regulation accuracy, long process time, and a lack of adaptability to pressure fluctuations. Secondly, the traditional detection instruments for capturing the leakage of the pressure reducing valve are often limited to visual inspection or single-point detection methods, unable to locate tiny leakage points and with low sensitivity. Thirdly, most of the existing technologies lack flexible docking and modification capabilities. The device is often limited to detecting valve bodies of fixed sizes and has poor adaptability. Finally, the existing equipment cannot achieve the efficient recycling of resources. The clamping mechanism or the frame design has insufficient rigidity, making it easy to generate vibrations or displacements during high-pressure operations, affecting the detection results. Therefore, the technical personnel in this field have provided an intelligent detection device for the pressure relief value of a pressure reducing valve with a stepwise pressure regulation function to solve the problems raised in the above background. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent detection device for the pressure relief value of a pressure reducing valve with a stepwise pressure regulation function to solve the problems raised in the existing technologies.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: The detection device includes a pressure reducing valve body, a simulated water supply mechanism, a drainage mechanism, a pressure division and regulation mechanism, a detection mechanism, a clamping mechanism, and a frame. The simulated water supply mechanism is connected to the pressure reducing valve body, the drainage mechanism is connected to the pressure reducing valve body, the pressure division and regulation mechanism is connected to the pressure reducing valve body, the detection mechanism is connected to the valve body, the clamping mechanism is clamped and connected to the pressure reducing valve body, and the simulated water supply mechanism, the drainage mechanism, the pressure division and regulation mechanism, the detection mechanism, and the clamping mechanism are all firmly connected to the frame.

[0007] By adopting the above technical solution, the pressure reducing valve body is used as the core object to be measured. Its water inlet is hermetically connected to the docking component of the simulated water supply mechanism through a DN50 flange, and the water outlet is docked with the filter inlet of the drainage mechanism through a corrugated hose. The pressure dividing and regulating mechanism is respectively connected to the pilot port and the pressure relief port of the valve body through a φ8mm stainless steel pipe to achieve pressure distribution control. The pilot pressure gauge of the detection mechanism is connected in parallel with the pilot port through a three-way joint, and the drainage pressure gauge is directly installed at the threaded interface of the pressure relief port. The V-shaped jaws of the clamping mechanism are driven by a servo motor to clamp the flange of the valve body with a clamping force of 1200N to eliminate vibration displacement during detection. The frame adopts a welded steel structure frame, and a T-shaped groove installation platform is set at the top. Each mechanism is modularly fixed through M16 bolts, and the flatness error is ≤0.1μm.

[0008] Furthermore, the pressure reducing valve body includes a valve body to be inspected, a lower valve cover, a valve stem, a valve core, an adjusting bolt, a first elastic member, a second elastic member, a first sealing ring and a valve plate. The valve body to be inspected is connected to the simulated water supply machine, and the valve body to be inspected is connected to the drainage mechanism. The clamping mechanism is tightly connected to the valve body to be inspected. The valve stem is slidably connected to the valve body to be inspected. The valve plate is fixedly connected to the valve stem. The valve core is fixedly connected to the valve stem. The valve core abuts against the valve body to be inspected. The valve core is frustum-shaped. The first sealing ring is fixedly connected to the valve plate and slidably connected to the valve body to be inspected. The first elastic member abuts against the valve stem and the adjusting bolt. The adjusting bolt is threadedly connected to the valve body to be inspected. The second elastic member is fixedly connected to the valve stem and the lower valve cover. The lower valve cover is threadedly connected to the valve body to be inspected. The first elastic member is located at the upper end of the valve body to be inspected, and the second elastic member is located at the lower end of the valve body to be inspected. The valve body to be inspected is provided with a water inlet, a water outlet, a pilot port, a pilot chamber, a pressure relief chamber and a pressure relief port. The water inlet is connected to the simulated water supply mechanism, the water outlet is connected to the drainage mechanism, the pilot port is connected to the detection mechanism, the pilot port is connected to the pressure dividing and regulating mechanism, the pilot port is connected to the pilot chamber, the pressure relief port is connected to the pressure relief chamber, and the pilot chamber is located above the pressure relief chamber.

[0009] By adopting the above technical solution, the valve body to be inspected serves as the main pressure-bearing housing and forms a sealed connection with the simulated water supply mechanism through the water inlet. The lower valve cover is fixed to the lower end of the valve body by threads to form a closed structure of the pressure relief chamber. The valve stem penetrates through the center of the valve body in a sliding fit manner and realizes water flow cutoff through a conical surface fit with the frustum-shaped valve core. The adjusting bolt is screwed into the top of the valve body through threads and cooperates with the first elastic member (spring) to form a valve stem pre-tightening force adjusting mechanism. When the system pressure fluctuates, the first elastic member changes the pre-tightening force by adjusting the screwing depth of the adjusting bolt, causing the valve core to generate a compensation displacement. The second elastic member (spring) is installed between the end of the valve stem and the lower valve cover and forms a valve core reset force through pre-compression. The first sealing ring is made of fluororubber and forms a combined sealing structure with the valve plate to maintain the sealing performance of the pilot chamber during the reciprocating movement of the valve stem. When the pressure at the water inlet increases, the medium acts on the lower end face of the valve plate through the pilot chamber, pushing the valve stem upward to compress the first elastic member and driving the conical valve core to open the pressure relief channel. The pressure relief chamber is communicated with the pressure dividing mechanism through the pressure relief port to achieve hierarchical pressure release. This structure enables precise control of the valve core opening during the detection process, achieving a dynamic balance detection effect. At the same time, the double-spring design realizes bidirectional pressure compensation, improving the detection accuracy.

[0010] Further, the simulated water supply mechanism includes a stepped pressure regulating component, a docking component, a water pump, and a water supply tank. The water pump is communicated with the water supply tank, the water supply tank is communicated with the drainage mechanism, the water pump is communicated with the stepped pressure regulating component, the stepped pressure regulating component is communicated with the docking component, and the docking component is communicated with the water inlet.

[0011] By adopting the above technical solution, the water pump extracts water from the water source and sends it into the water supply tank. At the same time, part of the water flow enters the stepped pressure regulating component for pressure regulation, and the regulated water flow enters the water inlet through the docking component and then enters the target water supply system. The drainage mechanism helps the water in the valve to flow back to the water supply tank to ensure the stability and efficiency of the system.

[0012] Further, the docking component includes a docking block, a rotating plate, a connecting pipe, a fixing plate, a fitting block, an expansion block, a third elastic member, and a docking motor. The rotating plate is slidably connected to the docking block, the docking block abuts against the water inlet, the connecting pipe is communicated with the stepped pressure regulating component, the fixing plate is fixedly connected to the connecting pipe, the fitting block is slidably connected to the docking block, the expansion block is fixedly connected to the fitting block, the third elastic member is fixedly connected to the docking block, the third elastic member is fixedly connected to the fitting block, the docking motor is fixedly connected to the fixing plate, the docking motor is drivingly connected to the rotating plate, and rotating chutes are provided on both the rotating plate and the fixing plate.

[0013] By adopting the above technical solution, the rotating plate is slidably connected to the docking block, enabling dynamic adjustment of the docking block and the water inlet, thus adapting to different docking diameters. The connecting pipe is connected to the stepped pressure regulating component, ensuring that the adjusted water flow can be stably transmitted to the docking component. The fixing plate firmly connects the connecting pipe and the docking motor, providing stable support for the component. The fitting block is slidably connected to the docking block, enhancing the flexibility of water flow adjustment. The expansion block is firmly connected to the fitting block, playing a role in further clamping the pressure valve body. The third elastic member provides elastic support when the pressure changes, ensuring the smooth operation of the system. The docking motor, through the transmission connection with the rotating plate, precisely controls the opening and closing size and ensures the smooth rotation of the rotating plate through the rotating chute, ensuring the efficient cooperation of each component during the working process.

[0014] Further, the stepped pressure regulating component includes a pressure regulating box, a first pressure regulating piston, a second pressure regulating piston, an elastic diaphragm, a first electromagnetic block, a first magnetic block, a fourth elastic member, a contact piston, a hinge rod, a piston rod, a connecting rod, a balance plate, and a pressure regulating rod. The pressure regulating box is connected to the water pump. The first pressure regulating piston and the second pressure regulating piston are both slidably connected to the pressure regulating box. The first pressure regulating piston and the second pressure regulating piston are in contact and slide against each other. The second pressure regulating piston is firmly connected to the fourth elastic member, and the fourth elastic member is firmly connected to the pressure regulating box. The first electromagnetic block is firmly connected to the pressure regulating box. The first electromagnetic block and the first magnetic block are attracted by magnetic poles for transmission. The elastic diaphragm is firmly connected to the pressure regulating rod, and the pressure regulating rod is firmly connected to the first pressure regulating piston. The connecting rod and the hinge rod are both hinged to the pressure regulating rod. The balance plate is firmly connected to the pressure regulating rod. The hinge rod is in transmission connection with the piston rod, the piston rod is in transmission connection with the contact piston, and the contact piston is slidably in contact with the pressure regulating box.

[0015] By adopting the above technical solution, the pressure regulating box is connected to the water pump, receives the water flow, and adjusts the pressure through the slidably connected first pressure regulating piston and second pressure regulating piston, ensuring that the water flow pressure is within a suitable range. The elastic diaphragm and the fourth elastic member provide elastic response, absorbing the instantaneous fluctuations of the water flow and preventing the system from malfunctioning due to pressure fluctuations. The first electromagnetic block and the first magnetic block are attracted by magnetic force, precisely controlling the movement of the piston and automatically adjusting the water flow pressure. The pressure regulating rod, through the cooperation with the connecting rod and the hinge rod, accurately transmits the adjustment information, controls the movement of the piston rod and the contact piston, and finally adjusts the water flow pressure. The balance plate provides support for the pressure regulating rod, ensuring the stable operation of the system. Through the close cooperation of these parts, the overall system not only improves the accuracy and response speed of water flow adjustment but also enhances the system's adaptability to pressure fluctuations, ensuring the efficient and stable operation of the water supply system.

[0016] Further, the drainage mechanism includes a drain pipe, a filter, a conductivity meter, and a return tank. The drain pipe is connected to the water outlet. The filter is connected to the drain pipe. The conductivity meter is firmly connected to the return tank, and the return tank is connected to the water supply tank.

[0017] By adopting the above technical solution, the filter adopts a three-stage filter element structure (80 mesh + 120 mesh + 200 mesh), and the conductivity meter monitors the return water quality in real time. When the conductivity exceeds 50μs / cm, the alarm is triggered. The built-in baffle in the return box forms an S-shaped flow channel, which extends the impurity precipitation time to 120 seconds. The drain pipe adopts 304 stainless steel bellows, which can withstand 2.5MPa bursting pressure. The medium at the outlet of the tested valve body enters the filter through the drain pipe, and enters the return box after removing particles >50μm. The water body that passes the conductivity test returns to the water supply tank through the siphon. This structure achieves a recycling rate of 98% for the detection medium, while ensuring the stability of the system for long-term operation.

[0018] Furthermore, the pressure dividing mechanism includes a pilot pressure dividing pipe, a drainage pressure dividing pipe, a pressure dividing box and a return pipe. The pilot pressure dividing pipe is connected to the pilot port, the pilot pressure dividing pipe is connected to the pressure dividing box, the return pipe is connected to the pressure dividing box, the return pipe is connected to the water supply tank, the drainage pressure dividing pipe is connected to the pressure dividing box, the drainage pressure dividing pipe is connected to the pressure relief port, and the pilot pressure dividing pipe, the drainage pressure dividing pipe, and the return pipe are all connected to the pressure dividing box. A control valve is installed at the connection between the pilot pressure dividing pipe, the drainage pressure dividing pipe, and the return pipe, and the pressure dividing box. The pressure dividing mechanism also includes a bolt adjustment column, a torque limiting column, a transmission column, an adjustment motor, a limiting elastic member, a limiting electromagnetic block, an adjustment frame, a pressure sensor and a lifting hydraulic cylinder. The lifting hydraulic cylinder is fastened to the clamping mechanism , the lifting hydraulic cylinder and the adjusting frame are connected by transmission, the adjusting motor and the adjusting frame are fastened, the adjusting motor and the transmission column are connected by transmission, the transmission column and the torque limiting column are connected by transmission, the torque limiting column and the limiting elastic part are fastened, the limiting elastic part and the bolt adjusting column are fastened, the limiting electromagnetic block and the bolt adjusting column are fastened, the limiting electromagnetic block and the torque limiting column are magnetically pole-repelling transmission, the torque limiting column and the bolt adjusting column are connected by transmission, the bolt adjusting column and the adjusting bolt are connected by transmission, a limiting groove is provided on the torque limiting column, a transmission groove is provided on the torque limiting column, the transmission groove is L-shaped, and the pressure sensor and the bolt adjusting column are fastened.

[0019] By adopting the above technical solution, the regulating motor drives the transmission column to rotate through the harmonic reducer, and the torque limiting column forms a sliding fit with the transmission groove under the 0.5N·m magnetic repulsion torque generated by the limiting electromagnetic block. When the pressure sensor detects that the axial force of the bolt adjustment column exceeds 200N, the limiting elastic member (disc spring group) is compressed by 2mm to achieve overload protection. The lifting hydraulic cylinder drives the adjustment frame to move vertically by ±15mm to ensure the precise alignment of the torque limiting column and the adjusting bolt of the valve body to be inspected. According to the preset detection curve, the system drives the bolt adjustment column to rotate by adjusting the motor, accurately controls the screw-in depth of the pressure reducing valve adjusting bolt (accuracy ±0.01mm), and forms a closed-loop control with the real-time feedback of the pressure sensor. The mechanism can adjust the torque 0-5N·m and the angle control accuracy is ±0.5°.

[0020] Furthermore, the detection mechanism includes a pilot pressure gauge, a drain pressure gauge, and a temperature sensor. The pilot pressure gauge is connected to the pilot port, the drain pressure gauge is connected to the pressure relief port, the temperature sensor is fastened to the clamping mechanism, and the temperature sensor is used to detect leakage at the valve body to be inspected.

[0021] By adopting the above technical solution, the pilot pressure gauge adopts a 0.25-level precision pressure transmitter with a range of 0-4MPa, which is connected to the pilot port through a φ6mm copper tube. The drainage pressure gauge is equipped with a pulse damper to effectively suppress the influence of pressure fluctuations on the reading. The temperature sensor adopts an infrared array type (8×8 pixels) and is installed on the inside of the clamp to detect the temperature field distribution on the valve body surface. When the local temperature difference exceeds 2°C, it is determined to be leaking. In the pressure holding stage, by comparing the pressure decay curves of the pilot port and the pressure relief port (sampling rate 10Hz), combined with the positioning of temperature abnormality points, tiny leaks of 0.1mm³ / min can be identified. The system achieves a leak positioning accuracy of ±1.5mm and a pressure detection error of <±0.1%FS.

[0022] Furthermore, the clamping mechanism includes an electric slide rail, a clamping claw, a clamping motor, a Z-block, a pulling rod and a clamping frame. The electric slide rail and the frame are fastened together, the electric slide rail and the clamping frame are transmission-connected, the clamping motor and the clamping frame are fastened together, the Z-block and the clamping frame are rotationally connected, the clamping motor and the Z-block are transmission-connected, the Z-block and the pulling rod are transmission-connected, and the pulling rod and the clamping claw are transmission-connected.

[0023] By adopting the above technical solution, the electric slide rail is driven by a linear motor with a repeat positioning accuracy of ±0.02mm. The clamping motor drives the Z-block to rotate 55° through a harmonic reducer, which is converted into radial movement of the clamping jaw (stroke 0-30mm) through the pull rod. The clamping jaw is lined with a V-shaped polyurethane friction block to adapt to DN50-DN200 valve body clamping. The system automatically adjusts the position of the electric slide rail according to the size of the valve body. The clamping motor drives the Z-block to rotate, and the clamping jaw generates a constant clamping force of 1200N through the lever principle. The mechanism can complete the valve body clamping within 15 seconds, and the deflection angle is <0.1°, meeting the rigidity requirements of high-pressure detection.

[0024] Compared with the prior art, the present invention has the following beneficial effects: By adjusting the motor-driven bolt adjusting column and the real-time feedback of the pressure sensor, a closed-loop control system is formed. Compared with traditional manual adjustment, this mechanism can accurately control the screwing depth of the adjusting bolt of the pressure reducing valve, greatly improving the repeatability and consistency of the detection process. An infrared array temperature sensor and a high-precision pressure gauge are used to identify micro-leaks and locate the accuracy through the analysis of the pressure decay curve and the detection of the temperature field distribution. Compared with traditional detection methods, the sensitivity and accuracy of leak detection are improved. The adjusting motor drives the torque limiting column and the bolt adjusting column to rotate through the transmission column, precisely adjusting the internal pressure of the pressure reducing valve. The limiting electromagnet and the limiting elastic member protect the system from overload at critical moments; and the docking motor of the docking component drives the rotating plate to rotate. Through the guidance of the rotating chute, the rotating plate drives the docking block to slide and fit the water inlet of the pressure reducing valve. The connecting pipe introduces water flow, the fixing plate provides stable support, the matching block and the expanding block cooperate to clamp the water inlet, and the third elastic member ensures smoothness during dynamic adjustment. The docking component can adapt to water inlets of different diameters, while ensuring the efficiency and sealing of water flow transmission, significantly improving the compatibility and operating stability of the system; and the first pressure regulating piston and the second pressure regulating piston adjust the opening and closing of the water flow channel by sliding to achieve preliminary and fine two-stage pressure regulation, and have the function of automatically closing when there is no water flow. The pressure regulating rod, supported by the elastic diaphragm and the fourth elastic member, drives the piston rod and the abutting piston through the connecting rod and the articulated rod to further optimize the water pressure. The balance plate ensures smooth movement, making the water pressure regulation more accurate, with a faster response speed, effectively absorbing instantaneous fluctuations, and ensuring the stable operation of the water supply system, and simulating the purpose of intermittent water supply and single-side water supply at the bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the clamping mechanism structure of the present invention; Figure 3 It is a schematic diagram of the pressure reducing valve body structure of the present invention; Figure 4 It is a schematic diagram of the simulated water supply mechanism structure of the present invention; Figure 5 It is a schematic diagram of the docking component structure of the present invention; Figure 6 It is a schematic diagram of the stepped pressure regulating component structure of the present invention; Figure 7 It is a schematic diagram of the drainage mechanism structure of the present invention; Figure 8 It is a schematic diagram of the partial pressure regulating mechanism structure of the present invention; Figure 9 It is a schematic diagram of the torque limiting column structure of the present invention; Figure 10 It is a schematic diagram of the Z-shaped block structure of the present invention.

[0026] In the figure: 1. Pressure reducing valve body; 11. Valve body to be inspected; 111. Water inlet; 112. Water outlet; 113. Pilot port; 114. Pilot cavity; 115. Pressure relief cavity; 116. Pressure relief port; 12. Lower valve cover; 13. Valve rod; 14. Valve core; 15. Adjusting bolt; 16. First elastic member; 17. Second elastic member; 18. First sealing ring; 19. Valve plate; 2. Simulated water supply mechanism; 21. Step voltage regulating assembly; 211. Voltage regulating box; 212. First pressure regulating piston; 213. Second pressure regulating piston; 214. Elastic diaphragm; 215. First electromagnetic block; 216. First magnetic block; 217. Fourth elastic member; 218. Abutting piston; 219. Hinge rod; 2110. Piston rod; 2111. Connecting rod; 2112. Balancing plate; 2113. Pressure regulating rod; 22. Docking assembly; 221. Docking block; 222. Rotating plate; 2221. Rotating chute; 223. Connecting pipe; 224. Fixed plate; 225. Fitting block; 226. Expansion block; 227. Third elastic member; 228. Docking motor; 23. Water pump; 24. Water supply tank; 3. Drainage mechanism; 31. Drain pipe; 32. Filter; 33. Conductivity meter; 34. Return tank; 4. Voltage division regulating mechanism; 41. Pilot voltage dividing pipe; 42. Drainage voltage dividing pipe; 43. Voltage dividing box; 44. Return pipe; 45. Bolt adjusting column; 46. Torque limiting column; 461. Limiting groove; 462. Transmission groove; 47. Transmission column; 48. Adjusting motor; 49. Limiting elastic member; 410. Limiting electromagnetic block; 411. Adjusting frame; 412. Pressure sensor; 413. Lifting hydraulic cylinder; 5. Detection mechanism; 51. Pilot pressure gauge; 52. Drainage pressure gauge; 53. Temperature sensor; 6. Clamping mechanism; 61. Electric slide rail; 62. Claw; 63. Clamping motor; 64. Z-shaped block; 65. Pulling rod; 66. Clamping frame; 7. Frame. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1 - Figure 10 As shown, the present invention provides a technical solution for an intelligent detection device for the pressure relief value of a pressure reducing valve with a step voltage regulating function: The detection device includes a pressure reducing valve body 1, a simulated water supply mechanism 2, a drainage mechanism 3, a pressure dividing and regulating mechanism 4, a detection mechanism 5, a clamping mechanism 6 and a frame 7. The simulated water supply mechanism 2 is connected to the pressure reducing valve body 1, the drainage mechanism 3 is connected to the pressure reducing valve body 1, the pressure dividing and regulating mechanism 4 is connected to the pressure reducing valve body 1, the detection mechanism 5 is connected to the valve body, the clamping mechanism 6 is clamped and connected to the pressure reducing valve body 1, and the simulated water supply mechanism 2, the drainage mechanism 3, the pressure dividing and regulating mechanism 4, the detection mechanism 5 and the clamping mechanism 6 are all fixedly connected to the frame 7.

[0029] By adopting the above technical solution, the pressure reducing valve body 1 is used as the core object to be measured. Its water inlet 111 is hermetically connected to the docking component 22 of the simulated water supply mechanism 2 through a DN50 flange, and the water outlet 112 is docked with the inlet of the filter 32 of the drainage mechanism 3 through a corrugated hose. The pressure dividing and regulating mechanism 4 is respectively connected to the pilot port 113 and the pressure relief port 116 of the valve body through a φ8mm stainless steel pipe to realize pressure distribution control. The pilot pressure gauge 51 of the detection mechanism 5 is connected in parallel with the pilot port 113 through a three-way joint, and the drainage pressure gauge 52 is directly installed on the threaded interface of the pressure relief port 116. The V-shaped jaws 62 of the clamping mechanism 6 are driven by a servo motor and clamp the flange of the valve body with a clamping force of 1200N to eliminate vibration displacement during detection. The frame 7 adopts a welded steel structure frame, and a T-slot installation platform is arranged at the top. Each mechanism is modularly fixed through M16 bolts, and the flatness error ≤0.1μm.

[0030] Further, the pressure relief valve body 1 includes a valve body to be inspected 11, a lower valve cover 12, a valve stem 13, a valve core 14, an adjusting bolt 15, a first elastic member 16, a second elastic member 17, a first sealing ring 18, and a valve plate 19. The valve body to be inspected 11 is communicated with the simulated water supply machine, the valve body to be inspected 11 is communicated with the drainage mechanism 3, the clamping mechanism 6 is clamped and connected with the valve body to be inspected 11, the valve stem 13 is slidably connected with the valve body to be inspected 11, the valve plate 19 is fixedly connected with the valve stem 13, the valve core 14 is fixedly connected with the valve stem 13, the valve core 14 abuts against the valve body to be inspected 11, the valve core 14 is frustum-shaped, the first sealing ring 18 is fixedly connected with the valve plate 19, the first sealing ring 18 is slidably connected with the valve body to be inspected 11, the first elastic member 16 abuts against the valve stem 13, the first elastic member 16 abuts against the adjusting bolt 15, the adjusting bolt 15 is threadedly connected with the valve body to be inspected 11, the second elastic member 17 is fixedly connected with the valve stem 13, the second elastic member 17 is fixedly connected with the lower valve cover 12, the lower valve cover 12 is threadedly connected with the valve body to be inspected 11, the first elastic member 16 is located at the upper end of the valve body to be inspected 11, the second elastic member 17 is located at the lower end of the valve body to be inspected 11, the valve body to be inspected 11 is provided with a water inlet 111, a water outlet 112, a pilot port 113, a pilot chamber 114, a pressure relief chamber 115, and a pressure relief port 116. The water inlet 111 is communicated with the simulated water supply mechanism 2, the water outlet 112 is communicated with the drainage mechanism 3, the pilot port 113 is communicated with the detection mechanism 5, the pilot port 113 is communicated with the pressure dividing and regulating mechanism 4, the pilot port 113 is communicated with the pilot chamber 114, the pressure relief port 116 is communicated with the pressure relief chamber 115, and the pilot chamber 114 is located above the pressure relief chamber 115.

[0031] By adopting the above technical solution, the valve body 11 to be inspected serves as the main pressure-bearing housing and forms a sealed connection with the simulated water supply mechanism 2 through the water inlet 111. The lower valve cover 12 is fixed to the lower end of the valve body by threads to form a closed structure for the pressure relief chamber 115. The valve stem 13 passes through the center of the valve body in a sliding fit manner and is in conical surface fit with the frustum-shaped valve core 14 to achieve water flow cutoff. The adjusting bolt 15 is screwed into the top of the valve body through threads and cooperates with the first elastic member 16 (spring) to form a pre-tightening force adjusting mechanism for the valve stem 13. When the system pressure fluctuates, the first elastic member 16 changes the pre-tightening force by adjusting the screwing depth of the adjusting bolt 15, causing the valve core 14 to generate a compensating displacement. The second elastic member 17 (spring) is installed between the end of the valve stem 13 and the lower valve cover 12 and forms a reset force for the valve core 14 through pre-compression. The first sealing ring 18 is made of fluororubber and forms a combined sealing structure with the valve plate to maintain the sealing performance of the pilot chamber 114 during the reciprocating movement of the valve stem 13. When the pressure at the water inlet 111 increases, the medium acts on the lower end face of the valve plate through the pilot chamber 114, pushing the valve stem 13 upward to compress the first elastic member 16 and driving the conical valve core 14 to open the pressure relief channel. The pressure relief chamber 115 is connected to the pressure dividing mechanism through the pressure relief port 116 to achieve staged pressure release. This structure enables the detection process to precisely control the opening degree of the valve core 14, achieving a dynamic balance detection effect. At the same time, the double-spring design realizes bidirectional pressure compensation, and the detection accuracy is improved by 35%.

[0032] Further, the simulated water supply mechanism 2 includes a stepped pressure regulating component 21, a docking component 22, a water pump 23, and a water supply tank 24. The water pump 23 is connected to the water supply tank 24, the water supply tank 24 is connected to the drainage mechanism 3, the water pump 23 is connected to the stepped pressure regulating component 21, the stepped pressure regulating component 21 is connected to the docking component 22, and the docking component 22 is connected to the water inlet 111.

[0033] By adopting the above technical solution, the water pump 23 extracts water from the water source and sends it into the water supply tank 24. At the same time, part of the water flow enters the stepped pressure regulating component 21 for pressure regulation. The regulated water flow enters the water inlet 111 through the docking component 22 and then enters the target water supply system. The drainage mechanism 3 helps the water in the valve to flow back to the water supply tank 24 to ensure the stability and efficiency of the system.

[0034] Furthermore, the docking component 22 includes a docking block 221, a rotating plate 222, a connecting pipe 223, a fixing plate 224, a mating block 225, an expansion block 226, a third elastic member 227, and a docking motor 228. The rotating plate 222 is slidably connected to the docking block 221. The docking block 221 abuts against the water inlet 111. The connecting pipe 223 is communicated with the cascade pressure regulating component 21. The fixing plate 224 is fixedly connected to the connecting pipe 223. The mating block 225 is slidably connected to the docking block 221. The expansion block 226 is fixedly connected to the mating block 225. The third elastic member 227 is fixedly connected to the docking block 221. The third elastic member 227 is fixedly connected to the mating block 225. The docking motor 228 is fixedly connected to the fixing plate 224. The docking motor 228 is drivingly connected to the rotating plate 222. Rotating chutes 2221 are provided on both the rotating plate 222 and the fixing plate 224.

[0035] By adopting the above technical solution, the rotating plate 222 is slidably connected to the docking block 221, which can realize the dynamic adjustment of the docking block 221 and the water inlet 111, so as to adapt to different docking diameters. The connecting pipe 223 is connected to the cascade pressure regulating component 21, ensuring that the adjusted water flow can be stably transmitted to the docking component 22. The fixing plate 224 fixedly connects the connecting pipe 223 and the docking motor 228, providing stable support for the components. The mating block 225 is slidably connected to the docking block 221, enhancing the flexibility of water flow adjustment. The expansion block 226 is fixedly connected to the mating block 225, playing a role in further clamping the pressure valve body. The third elastic member 227 provides elastic support when the pressure changes, ensuring the smooth operation of the system. The docking motor 228 precisely controls the opening and closing size through the driving connection with the rotating plate 222, and ensures the smooth rotation of the rotating plate 222 through the rotating chute 2221, ensuring the efficient cooperation of each component during the working process.

[0036] Furthermore, the stepped pressure regulating assembly 21 includes a pressure regulating box 211, a first pressure regulating piston 212, a second pressure regulating piston 213, an elastic diaphragm 214, a first electromagnetic block 215, a first magnetic block 216, a fourth elastic member 217, an abutting piston 218, a hinged rod 219, a piston rod 2110, a connecting rod 2111, a balance plate 2112 and a pressure regulating rod 2113. The pressure regulating box 211 is communicated with the water pump 23. The first pressure regulating piston 212 and the second pressure regulating piston 213 are both slidably connected to the pressure regulating box 211. The first pressure regulating piston 212 and the second pressure regulating piston 213 are in abutting sliding connection. The second pressure regulating piston 213 is fixedly connected to the fourth elastic member 217. The fourth elastic member 217 is fixedly connected to the pressure regulating box 211. The first electromagnetic block 215 is fixedly connected to the pressure regulating box 211. The first electromagnetic block 215 and the first magnetic block 216 are attracted by magnetic poles for transmission. The elastic diaphragm 214 is fixedly connected to the pressure regulating rod 2113. The pressure regulating rod 2113 is fixedly connected to the first pressure regulating piston 212. The connecting rod 2111 and the hinged rod 219 are both hinged to the pressure regulating rod 2113. The balance plate 2112 is fixedly connected to the pressure regulating rod 2113. The hinged rod 219 is in transmission connection with the piston rod 2110. The piston rod 2110 is in transmission connection with the abutting piston 218. The abutting piston 218 is in sliding abutment with the pressure regulating box 211.

[0037] By adopting the above technical solution, the pressure regulating box 211 is communicated with the water pump 23, receives water flow and adjusts the pressure through the slidably connected first pressure regulating piston 212 and second pressure regulating piston 213 to ensure that the water flow pressure is within a suitable range. The elastic diaphragm 214 and the fourth elastic member 217 provide elastic response, absorb the instantaneous fluctuation of the water flow, and prevent the system from malfunctioning due to pressure fluctuation. The first electromagnetic block 215 and the first magnetic block 216 are attracted by magnetic force to precisely control the movement of the piston and automatically adjust the water flow pressure. The pressure regulating rod 2113 precisely transmits the adjustment information through the cooperation with the connecting rod 2111 and the hinged rod 219, controls the movement of the piston rod 2110 and the abutting piston 218, and finally adjusts the water flow pressure. The balance plate 2112 provides support for the pressure regulating rod 2113 to ensure the stable operation of the system. Through the close cooperation of these parts, the overall system not only improves the accuracy and response speed of water flow regulation, but also enhances the adaptability of the system to pressure fluctuation, ensuring the efficient and stable operation of the water supply system.

[0038] Furthermore, the drainage mechanism 3 includes a drain pipe 31, a filter 32, a conductivity meter 33 and a return box 34. The drain pipe 31 is communicated with the water outlet 112. The filter 32 is communicated with the drain pipe 31. The conductivity meter 33 is fixedly connected to the return box 34. The return box 34 is communicated with the water supply tank 24.

[0039] By adopting the above technical solution, the filter 32 adopts a three-stage filter element structure (80 mesh + 120 mesh + 200 mesh). The conductivity meter 33 monitors the quality of the returned water in real time, and triggers an alarm when the conductivity exceeds 50 μs / cm. The reflux box 34 is internally provided with baffle plates to form an S-shaped flow channel, extending the impurity precipitation time to 120 seconds. The drain pipe 31 is made of 304 stainless steel corrugated pipe, which can withstand a bursting pressure of 2.5 MPa. The medium at the outlet 112 of the valve body to be measured enters the filter 32 through the drain pipe 31, and after removing particles larger than 50 μm, it enters the reflux box 34. The water body qualified through conductivity detection returns to the water supply tank 24 through the siphon tube. This structure realizes a detection medium circulation utilization rate of 98%, and at the same time ensures the stability of the long-term operation of the system.

[0040] Further, the pressure dividing mechanism includes a pilot pressure dividing pipe 41, a drain pressure dividing pipe 42, a pressure dividing box 43 and a reflux pipe 44. The pilot pressure dividing pipe 41 is communicated with the pilot port 113, the pilot pressure dividing pipe 41 is communicated with the pressure dividing box 43, the reflux pipe 44 is communicated with the pressure dividing box 43, the reflux pipe 44 is communicated with the water supply tank 24, the drain pressure dividing pipe 42 is communicated with the pressure dividing box 43, and the drain pressure dividing pipe 42 is communicated with the pressure relief port 116. Control valves are installed at the connection points of the pilot pressure dividing pipe 41, the drain pressure dividing pipe 42 and the reflux pipe 44 with the pressure dividing box 43. The pressure dividing mechanism further includes a bolt adjusting column 45, a torque limiting column 46, a transmission column 47, an adjusting motor 48, a limiting elastic member 49, a limiting electromagnet 410, an adjusting frame 411, a pressure sensor 412 and a lifting hydraulic cylinder 413. The lifting hydraulic cylinder 413 is fixedly connected to the clamping mechanism 6, the lifting hydraulic cylinder 413 is in transmission connection with the adjusting frame 411, the adjusting motor 48 is fixedly connected to the adjusting frame 411, the adjusting motor 48 is in transmission connection with the transmission column 47, the transmission column 47 is in transmission connection with the torque limiting column 46, the torque limiting column 46 is fixedly connected to the limiting elastic member 49, the limiting elastic member 49 is fixedly connected to the bolt adjusting column 45, the limiting electromagnet 410 is fixedly connected to the bolt adjusting column 45, the limiting electromagnet 410 and the torque limiting column 46 are magnetically repelled and transmitted, the torque limiting column 46 is in transmission connection with the bolt adjusting column 45, the bolt adjusting column 45 is in transmission connection with the adjusting bolt 15. A limiting groove 461 is provided on the torque limiting column 46, a transmission groove 462 is provided on the torque limiting column 46, the transmission groove 462 is L-shaped, and the pressure sensor 412 is fixedly connected to the bolt adjusting column 45.

[0041] By adopting the above technical solution, the adjusting motor 48 drives the transmission column 47 to rotate through the harmonic reducer, and the torque limiting column 46 forms a sliding fit with the transmission groove 462 under the 0.5N·m magnetic repulsion torque generated by the limiting electromagnetic block 410. When the pressure sensor 412 detects that the axial force of the bolt adjustment column 45 exceeds 200N, the limiting elastic member 49 (disc spring group) is compressed by 2mm to achieve overload protection. The lifting hydraulic cylinder 413 drives the adjustment frame 411 to move vertically by ±15mm to ensure the precise alignment of the torque limiting column 46 and the adjustment bolt 15 of the valve body 11 to be inspected. According to the preset detection curve, the system drives the bolt adjustment column 45 to rotate by adjusting the motor 48, accurately controls the screw-in depth of the pressure reducing valve adjustment bolt 15 (accuracy ±0.01mm), and forms a closed-loop control with the real-time feedback of the pressure sensor 412. The mechanism realizes the adjustable torque of 0-5N·m and the angle control accuracy of ±0.5°.

[0042] Furthermore, the detection mechanism 5 includes a pilot pressure gauge 51, a drain pressure gauge 52, and a temperature sensor 53. The pilot pressure gauge 51 is connected to the pilot port 113, the drain pressure gauge 52 is connected to the pressure relief port 116, and the temperature sensor 53 is fastened to the clamping mechanism 6. The temperature sensor 53 is used to detect leakage at the valve body 11 to be inspected.

[0043] By adopting the above technical solution, the pilot pressure gauge 51 adopts a 0.25-level precision pressure transmitter with a range of 0-4MPa, and is connected to the pilot port 113 through a φ6mm copper tube. The drainage pressure gauge 52 is equipped with a pulse damper to effectively suppress the influence of pressure fluctuations on the readings. The temperature sensor 53 adopts an infrared array type (8×8 pixels) and is installed on the inside of the clamp 62 to detect the temperature field distribution on the valve body surface. When the local temperature difference exceeds 2°C, it determines the leakage. In the pressure holding stage, by comparing the pressure decay curves of the pilot port 113 and the pressure relief port 116 (sampling rate 10Hz), combined with the positioning of the temperature abnormality point, a small leak of 0.1mm³ / min can be identified. The system achieves a leak positioning accuracy of ±1.5mm and a pressure detection error of <±0.1%FS.

[0044] Furthermore, the clamping mechanism 6 includes an electric slide rail 61, a clamping claw 62, a clamping motor 63, a Z-block 64, a pulling rod 65 and a clamping frame 66. The electric slide rail 61 is fastened to the frame 7, the electric slide rail 61 is transmission-connected to the clamping frame, the clamping motor 63 is fastened to the clamping frame 66, the Z-block 64 is rotationally connected to the clamping frame 66, the clamping motor 63 is transmission-connected to the Z-block 64, the Z-block 64 is transmission-connected to the pulling rod 65, and the pulling rod 65 is transmission-connected to the clamping claw 62.

[0045] By adopting the above technical solution, the electric slide rail 61 is driven by a linear motor with a repeat positioning accuracy of ±0.02 mm. The clamping motor 63 drives the Z-shaped block 64 to rotate by 55° through a harmonic reducer, and is converted into the radial movement of the jaw 62 (stroke 0 - 30 mm) through the pull rod 65. The inner lining of the jaw 62 is a V-shaped polyurethane friction block, which is suitable for clamping valve bodies with DN50 - DN200. The system automatically adjusts the position of the electric slide rail 61 according to the valve body size, and the clamping motor 63 drives the Z-shaped block 64 to rotate. Through the lever principle, the jaw 62 generates a constant clamping force of 1200 N. This mechanism can complete the clamping of the valve body within 15 seconds, with a deflection angle <0.1°, meeting the rigid requirements of high-pressure detection.

[0046] The working principle of the present invention: By adjusting the bolt adjusting column 45 driven by the adjusting motor 48 and the real-time feedback of the pressure sensor 412, a closed-loop control system is formed. Compared with the traditional manual adjustment, this mechanism can accurately control the screwing depth of the adjusting bolt 15 of the pressure reducing valve, greatly improving the repeatability and consistency of the detection process. An infrared array thermal sensor 53 and a high-precision pressure gauge are adopted. Through the analysis of the pressure decay curve and the detection of the temperature field distribution, the identification of micro-leaks and the positioning of accuracy are realized. Compared with the traditional detection method, the sensitivity and accuracy of leak detection are improved. The adjusting motor 48 drives the torque limiting column 46 and the bolt adjusting column 45 to rotate through the transmission column 47 to accurately adjust the internal pressure of the pressure reducing valve. The limiting electromagnet block 410 and the limiting elastic member 49 protect the system from overload at critical moments; and the docking motor 228 of the docking assembly 22 drives the rotating plate 222 to rotate. Through the guidance of the rotating chute 2221, the rotating plate 222 drives the docking block 221 to slide and fit the water inlet 111 of the pressure reducing valve. The connecting pipe 223 introduces water flow, the fixing plate 224 provides stable support, the cooperation block 225 and the expansion block 226 cooperate to clamp the water inlet 111, and the third elastic member 227 ensures the smoothness during dynamic adjustment. The docking assembly 22 can adapt to water inlets 111 of different diameters, while ensuring the high efficiency and tightness of water flow transmission, significantly improving the compatibility and operation stability of the system; and the first pressure regulating piston 212 and the second pressure regulating piston 213 adjust the opening and closing of the water flow channel by sliding, realizing primary and fine double-stage pressure regulation, and having the function of automatically closing when there is no water flow. The pressure regulating rod 2113, supported by the elastic diaphragm 214 and the fourth elastic member 217, drives the piston rod 2110 and the abutting piston 218 through the connecting rod 2111 and the articulated rod 219 to further optimize the water pressure. The balance plate 2112 ensures smooth movement, making the water pressure regulation more accurate, with a faster response speed, effectively absorbing instantaneous fluctuations, and ensuring the stable operation of the water supply system, and simulating the purpose of intermittent water supply and single-side water supply at the bottom.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any respect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function, characterized in that: The detection device comprises a pressure reducing valve body (1), a simulated water supply mechanism (2), a drainage mechanism (3), a partial pressure regulating mechanism (4), a detection mechanism (5), a clamping mechanism (6) and a frame (7); the simulated water supply mechanism (2) is connected to the pressure reducing valve body (1); the drainage mechanism (3) is connected to the pressure reducing valve body (1); the partial pressure regulating mechanism (4) is connected to the pressure reducing valve body (1); the detection mechanism (5) is connected to the valve body; the clamping mechanism (6) is clamped to the pressure reducing valve body (1); and the simulated water supply mechanism (2), the drainage mechanism (3), the partial pressure regulating mechanism (4), the detection mechanism (5) and the clamping mechanism (6) are all tightly connected to the frame (7).

2. According to claim 1, the intelligent detection device for pressure relief value of a pressure reducing valve with a step pressure regulating function is characterized in that: The pressure reducing valve body (1) comprises a valve body to be inspected (11), a lower valve cover (12), a valve stem (13), a valve core (14), an adjusting bolt (15), a first elastic member (16), a second elastic member (17), a first sealing ring (18) and a valve plate (19); the valve body to be inspected (11) is connected to a simulated water supply machine; the valve body to be inspected (11) is connected to a drainage mechanism (3); the clamping mechanism (6) is clamped and connected to the valve body to be inspected (11); the valve stem (13) is slidably connected to the valve body to be inspected (11); The valve plate and the valve stem (13) are tightly connected, the valve core (14) and the valve stem (13) are tightly connected, the valve core (14) and the valve body (11) to be inspected are in contact with each other, the valve core (14) is in a truncated cone shape, the first sealing ring (18) and the valve plate (19) are tightly connected, the first sealing ring (18) and the valve body (11) to be inspected are slidably connected, the first elastic member (16) and the valve stem (13) are in contact with each other, the first elastic member (16) and the adjusting bolt (15) are in contact with each other, the adjusting bolt (15) and the valve body to be inspected are in contact with each other, and the adjusting bolt (15) and the valve body to be inspected are in contact with each other. (11) is threadedly connected, the second elastic member (17) is tightly connected to the valve stem (13), the second elastic member (17) is tightly connected to the lower valve cover (12), the lower valve cover (12) is threadedly connected to the valve body (11) to be inspected, the first elastic member (16) is located at the upper end of the valve body (11) to be inspected, the second elastic member (17) is located at the lower end of the valve body (11) to be inspected, and the valve body (11) to be inspected is provided with a water inlet (111), a water outlet (112), a pilot port (113), and a pilot cavity (114). ), a pressure relief chamber (115) and a pressure relief port (116), the water inlet (111) being in communication with a simulated water supply mechanism (2), the water outlet (112) being in communication with a drainage mechanism (3), the pilot port (113) being in communication with a detection mechanism (5), the pilot port (113) being in communication with a pressure dividing regulating mechanism (4), the pilot port (113) being in communication with a pilot chamber (114), the pressure relief port (116) being in communication with a pressure relief chamber (115), and the pilot chamber (114) being located above the pressure relief chamber (115).

3. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 2 is characterized in that: The simulated water supply mechanism (2) comprises a stepped pressure regulating assembly (21), a docking assembly (22), a water pump (23) and a water supply tank (24); the water pump (23) and the water supply tank (24) are in communication; the water supply tank (24) and the drainage mechanism (3) are in communication; the water pump (23) and the stepped pressure regulating assembly (21) are in communication; the stepped pressure regulating assembly (21) and the docking assembly (22) are in communication; and the docking assembly (22) and the water inlet (111) are in communication.

4. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 3 is characterized in that: The docking assembly (22) comprises a docking block (221), a rotating plate (222), a connecting pipe (223), a fixing plate (224), a matching block (225), an expansion block (226), a third elastic member (227) and a docking motor (228); the rotating plate (222) and the docking block (221) are slidably connected; the docking block (221) and the water inlet (111) are in contact; the connecting pipe (223) and the step pressure regulating assembly (21) are in communication; the fixing plate (224) and the connecting pipe (223) are tightly connected; The matching block (225) and the docking block (221) are slidably connected, the expansion block (226) and the matching block (225) are firmly connected, the third elastic member (227) and the docking block (221) are firmly connected, the third elastic member (227) and the matching block (225) are firmly connected, the docking motor (228) and the fixed plate (224) are firmly connected, the docking motor (228) and the rotating plate (222) are transmission-connected, and a rotating slide groove (2221) is provided on both the rotating plate (222) and the fixed plate (224).

5. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 4 is characterized in that: The step pressure regulating assembly (21) comprises a pressure regulating box (211), a first pressure regulating piston (212), a second pressure regulating piston (213), an elastic diaphragm (214), a first electromagnetic block (215), a first magnetic block (216), a fourth elastic member (217), an abutting piston (218), a hinged rod (219), a piston rod (2110), a connecting rod (2111), a balancing plate (2112) and a pressure regulating rod (2113); the pressure regulating box (211) is connected to the water pump (23); the first pressure regulating piston (212) and the second pressure regulating piston (213) are both slidably connected to the pressure regulating box (211); the first pressure regulating piston (212) and the second pressure regulating piston (213) are abutted and slidably connected; the second pressure regulating piston (213) and the fourth elastic member (217) are tightly connected; The fourth elastic member (217) is tightly connected to the pressure regulating box (211), the first electromagnetic block (215) is tightly connected to the pressure regulating box (211), the first electromagnetic block (215) and the first magnetic block (216) are electrically connected by magnetic pole attraction, the elastic diaphragm (214) is tightly connected to the pressure regulating rod (2113), the pressure regulating rod (2113) and the first pressure regulating piston (212) are tightly connected, the connecting rod (2111) and the hinged rod (219) are both hinged to the pressure regulating rod (2113), the balancing plate (2112) and the pressure regulating rod (2113) are tightly connected, the hinged rod (219) and the piston rod (2110) are electrically connected, the piston rod (2110) and the abutting piston (218) are electrically connected, and the abutting piston (218) and the pressure regulating box (211) are slidably abutted.

6. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 5, characterized in that: The drainage mechanism (3) comprises a drainage pipe (31), a filter (32), a conductivity meter (33) and a return box (34); the drainage pipe (31) is in communication with a water outlet (112); the filter (32) is in communication with the drainage pipe (31); the conductivity meter (33) is fixedly connected to the return box (34); and the return box (34) is in communication with a water supply box (24).

7. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 6, characterized in that: The pressure dividing mechanism comprises a pilot pressure dividing pipe (41), a drainage pressure dividing pipe (42), a pressure dividing box (43) and a return pipe (44); the pilot pressure dividing pipe (41) is connected to the pilot port (113); the pilot pressure dividing pipe (41) is connected to the pressure dividing box (43); the return pipe (44) is connected to the pressure dividing box (43); the return pipe (44) is connected to the water supply box (24); the drainage pressure dividing pipe (42) is connected to the pressure dividing box (43); the drainage pressure dividing pipe (42) is connected to the pressure relief port (116); The pilot pressure-dividing pipe (41), the drainage pressure-dividing pipe (42), and the return pipe (44) are all connected to the pressure-dividing box (43) with control valves installed at their connection points. The pressure-dividing mechanism also includes a bolt adjustment column (45), a torque limiting column (46), a transmission column (47), an adjustment motor (48), a limiting elastic member (49), a limiting electromagnetic block (410), an adjustment frame (411), a pressure sensor (412), and a lifting hydraulic cylinder (413). The lifting hydraulic cylinder (413) is fastened to the clamping mechanism (6). The lifting hydraulic cylinder (413) is connected to the adjusting frame (411) in a transmission connection, the adjusting motor (48) is fixedly connected to the adjusting frame (411), the adjusting motor (48) is connected to the transmission column (47), the transmission column (47) is connected to the torque limiting column (46), the torque limiting column (46) is fixedly connected to the limiting elastic member (49), the limiting elastic member (49) is fixedly connected to the bolt adjusting column (45), the limiting electromagnetic block (410) is connected to the bolt adjusting column (45) The limiting electromagnetic block (410) and the torque limiting column (46) are connected in a transmission manner by magnetic pole repulsion, the torque limiting column (46) and the bolt adjustment column (45) are connected in a transmission manner, the bolt adjustment column (45) and the adjustment bolt (15) are connected in a transmission manner, the torque limiting column (46) is provided with a limiting groove (461), the torque limiting column (46) is provided with a transmission groove (462), the transmission groove (462) is L-shaped, and the pressure sensor (412) and the bolt adjustment column (45) are connected in a transmission manner.

8. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 7, characterized in that: The detection mechanism (5) comprises a pilot pressure gauge (51), a drainage pressure gauge (52), and a temperature sensor (53); the pilot pressure gauge (51) is connected to the pilot port (113); the drainage pressure gauge (52) is connected to the pressure relief port (116); the temperature sensor (53) is tightly connected to the clamping mechanism (6); and the temperature sensor (53) is used to detect leakage at the valve body (11) to be inspected.

9. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 8, characterized in that: The clamping mechanism (6) comprises an electric slide rail (61), a clamping claw (62), a clamping motor (63), a Z-shaped block (64), a pulling rod (65) and a clamping frame (66); the electric slide rail (61) and the frame (7) are fixedly connected; the electric slide rail (61) and the clamping frame (66) are transmission-connected; the clamping motor (63) and the clamping frame (66) are fixedly connected; the Z-shaped block (64) and the clamping frame (66) are rotationally connected; the clamping motor (63) and the Z-shaped block (64) are transmission-connected; the Z-shaped block (64) and the pulling rod (65) are transmission-connected; and the pulling rod (65) and the clamping claw (62) are transmission-connected.

Images