An intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulation function

Abstract

The application discloses a pressure relief value intelligent detection equipment with step pressure regulating function for a pressure reducing valve, and relates to the technical field of detection equipment. The detection equipment comprises a pressure reducing valve body, a simulated water supply mechanism, a drainage mechanism, a partial pressure adjusting mechanism, a detection mechanism, a clamping mechanism and a rack. The simulated water supply mechanism and the pressure reducing valve body are communicated, the drainage mechanism and the pressure reducing valve body are communicated, the partial pressure adjusting mechanism and the pressure reducing valve body are communicated, the detection mechanism and the valve body are communicated, and the clamping mechanism and the pressure reducing valve body are clamped and connected. The simulated water supply mechanism, the drainage mechanism, the partial pressure adjusting mechanism, the detection mechanism and the clamping mechanism are fastened to the rack. The pressure reducing valve body is a core measured object. The water inlet of the pressure reducing valve body is hard sealed to a butt joint assembly of the simulated water supply mechanism, the water outlet is butt jointed to the filter inlet of the drainage mechanism, the partial pressure adjusting mechanism is communicated with the valve body, and then the detection mechanism is used to achieve the purpose of step pressure regulating detection.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, in particular to an intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function. Background Art

[0002] With the rapid development of industrial automation and intelligentization, hydraulic and fluid control systems have been widely used in water treatment, building water supply, industrial production, and other fields. Pressure reducing valves, as key regulating equipment, play a core role in ensuring system safety and stability. The performance of pressure reducing valves directly affects production efficiency, resource waste, and the economic and reliability of equipment operation. Therefore, the quality inspection technology of pressure reducing valves has become a major research hotspot.

[0003] Traditional methods of detecting the pressure relief value of pressure reducing valves mostly rely on manual monitoring, which has problems such as manual error, inconvenient operation and long detection cycle.

[0004] Regarding the above-mentioned existing technologies, firstly, the efficiency of graded pressure regulation is low, and the traditional manual adjustment or single-point pressure adjustment method cannot achieve automatic graded pressure release, the adjustment accuracy is low, the process is time-consuming, and there is a lack of adaptability to pressure fluctuations. Secondly, the detection of pressure reducing valve leaks by traditional detection instruments is often limited to visual inspection or single-point detection methods, which cannot locate tiny leak points and have low sensitivity. Furthermore, most existing technologies lack flexible docking and modification capabilities, and the devices are often limited to detecting valve bodies of fixed sizes and have poor adaptability. Finally, existing equipment cannot achieve efficient recycling of resources, and the clamping mechanism or frame design is not rigid enough, which makes it easy to generate vibration or displacement during high-pressure operation, affecting the detection results. Therefore, those skilled in the art provide an intelligent pressure relief value detection device for pressure reducing valves with a stepped pressure regulation function to solve the problems raised in the above background. Summary of the Invention

[0005] The object of the present invention is to provide an intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function, so as to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The detection equipment includes a pressure reducing valve body, a simulated water supply mechanism, a drainage mechanism, a pressure dividing adjustment 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 dividing adjustment mechanism is connected to the pressure reducing valve body, the detection mechanism is connected to the valve body, the clamping mechanism and the pressure reducing valve body are clamped in connection, and the simulated water supply mechanism, the drainage mechanism, the pressure dividing adjustment mechanism, the detection mechanism and the clamping mechanism are all fastened to the frame.

[0008] By adopting the technical scheme, the pressure relief valve body is taken as a core measured object, the water inlet of the pressure relief valve body is hard sealed and connected with a docking assembly of the simulated water supply mechanism through a DN50 flange, and the water outlet is docked with an inlet of a filter of the drainage mechanism through a corrugated hose. The pressure distribution adjusting mechanism is connected with the pilot port and the pressure relief port of the valve body through a φ8mm stainless steel pipe, so as to realize pressure distribution control. The pilot pressure gauge of the detection mechanism is connected with the pilot port in parallel through a tee joint, and the drainage pressure gauge is directly installed on the threaded interface of the pressure relief port. The V-shaped clamping jaw of the clamping mechanism is driven by a servo motor, so as to hold the flange of the valve body with a clamping force of 1200N, and eliminate vibration displacement during detection. The rack is a welded steel structure frame, a T-shaped groove installation platform is arranged at the top, and each mechanism is modularly fixed through M16 bolts, and the flatness error is less than or equal to 0.1μm.

[0009] Further, the pressure relief valve body comprises a valve body to be detected, a lower valve cover, a valve rod, 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 detected is connected with the simulated water supply mechanism, the valve body to be detected is connected with the drainage mechanism, the clamping mechanism is clamped and connected with the valve body to be detected, the valve rod is slidably connected with the valve body to be detected, the valve plate is fixedly connected with the valve rod, the valve core is fixedly connected with the valve rod, the valve core abuts against the valve body to be detected, the valve core is a circular truncated cone, the first sealing ring is fixedly connected with the valve plate, the first sealing ring is slidably connected with the valve body to be detected, the first elastic member abuts against the valve rod, the first elastic member abuts against the adjusting bolt, the adjusting bolt is threadedly connected with the valve body to be detected, the second elastic member is fixedly connected with the valve rod, the second elastic member is fixedly connected with the lower valve cover, the lower valve cover is threadedly connected with the valve body to be detected, the first elastic member is located at the upper end of the valve body to be detected, the second elastic member is located at the lower end of the valve body to be detected, the valve body to be detected is provided with a water inlet, a water outlet, a pilot port, a pilot cavity, a pressure relief cavity and a pressure relief port, the water inlet is connected with the simulated water supply mechanism, the water outlet is connected with the drainage mechanism, the pilot port is connected with the detection mechanism, the pilot port is connected with the pressure distribution adjusting mechanism, the pilot port is connected with the pilot cavity, the pressure relief port is connected with the pressure relief cavity, and the pilot cavity is located above the pressure relief cavity.

[0010] Using this technical solution, the valve body under inspection serves as the primary pressure-bearing housing, forming a sealed connection with the simulated water supply mechanism via the water inlet. The lower valve cover is threadedly secured to the lower end of the valve body, forming a closed pressure relief chamber. The valve stem slides through the center of the valve body and engages with the conical spool via a tapered surface to cut off water flow. An adjusting bolt, threaded into the top of the valve body, cooperates with a first elastic element (spring) to form the stem preload adjustment mechanism. When system pressure fluctuates, the first elastic element varies the preload by adjusting the screw depth, causing the valve spool to compensate for displacement. The second elastic element (spring), installed between the end of the valve stem and the lower valve cover, creates a pre-compression force to return the valve spool to its original position. The first sealing ring, made of fluororubber, forms a combined sealing structure with the valve disc, maintaining the tightness of the pilot chamber during reciprocating motion of the valve stem. When the inlet pressure increases, the medium acts on the lower end of the valve disc through the pilot chamber, pushing the valve stem upward and compressing the first elastic element, thereby driving the tapered spool to open the pressure relief channel. The pressure relief chamber is connected to the pressure regulating mechanism via a pressure relief port, achieving graded pressure release. This structure allows precise control of the valve core opening during testing, achieving a dynamic balance test effect. The dual-spring design also enables bidirectional pressure compensation, improving test accuracy.

[0011] Furthermore, the simulated water supply mechanism includes a step pressure regulating assembly, a docking assembly, a water pump and a water supply tank. The water pump is connected to the water supply tank, the water supply tank is connected to the drainage mechanism, the water pump is connected to the step pressure regulating assembly, the step pressure regulating assembly is connected to the docking assembly, and the docking assembly is connected to the water inlet.

[0012] By adopting the above technical solution, the water pump draws water from the water source and sends it into the water supply tank. At the same time, part of the water flows into the stepped pressure regulating assembly for pressure regulation. The regulated water flows into the water inlet through the docking assembly and then enters the target water supply system. The drainage mechanism helps the water in the valve flow back to the water supply tank, ensuring the stability and efficiency of the system.

[0013] Furthermore, the docking assembly includes a docking block, a rotating plate, a connecting pipe, a fixed plate, a matching block, an expansion block, a third elastic member and a docking motor. The rotating plate and the docking block are slidingly connected, the docking block and the water inlet are abutted, the connecting pipe and the step pressure regulating assembly are connected, the fixed plate and the connecting pipe are tightly connected, the matching block and the docking block are slidingly connected, the expansion block and the matching block are tightly connected, the third elastic member and the docking block are tightly connected, the third elastic member and the matching block are tightly connected, the docking motor and the fixed plate are tightly connected, the docking motor and the rotating plate are transmission-connected, and rotating slide grooves are provided on both the rotating plate and the fixed plate.

[0014] By adopting the above technical scheme, the rotating plate and the butt joint block are in sliding connection, the dynamic adjustment of the butt joint block and the water inlet can be realized, so as to adapt to different butt joint diameters. The connecting pipe is connected with the stepped pressure regulating assembly, so that the adjusted water flow can be stably transmitted to the butt joint assembly. The fixed plate fastens the connecting pipe and the butt joint motor, and provides stable support for the assembly. The matching block and the butt joint block are in sliding connection, which enhances the flexibility of water flow adjustment. The expansion block and the matching block are fastened, which further clamps the valve body. The third elastic member provides elastic support when the pressure changes, so as to ensure the stable operation of the system. The butt joint motor is in transmission connection with the rotating plate, so as to accurately control the opening and closing size, and ensure the stable rotation of the rotating plate through the rotating sliding groove, so as to ensure the efficient cooperation of each component in the working process.

[0015] Further, the stepped pressure regulating assembly comprises 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, an abutting piston, a hinged rod, a piston rod, a connecting rod, a balance plate and a pressure regulating rod. The pressure regulating box is in communication with the water pump. The first pressure regulating piston and the second pressure regulating piston are in sliding connection with the pressure regulating box. The first pressure regulating piston and the second pressure regulating piston abut and slide. The second pressure regulating piston and the fourth elastic member are fastened. The fourth elastic member and the pressure regulating box are fastened. The first electromagnetic block and the pressure regulating box are fastened. The first electromagnetic block and the first magnetic block are in magnetic pole attraction transmission. The elastic diaphragm and the pressure regulating rod are fastened. The pressure regulating rod and the first pressure regulating piston are fastened. The connecting rod and the hinged rod are hinged with the pressure regulating rod. The balance plate and the pressure regulating rod are fastened. The hinged rod and the piston rod are in transmission connection. The piston rod and the abutting piston are in transmission connection. The abutting piston and the pressure regulating box are in sliding abutment.

[0016] By adopting the above technical scheme, the pressure regulating box is in communication with the water pump, receives water flow and adjusts the pressure through the sliding connection of the first pressure regulating piston and the second pressure regulating piston, so as to ensure that the water flow pressure is within a suitable range. The elastic diaphragm and the fourth elastic member 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 and the first magnetic block are in magnetic attraction through magnetic force, accurately control the movement of the piston, and automatically adjust the water flow pressure. The pressure regulating rod accurately transmits the adjustment information through cooperation with the connecting rod and the hinged rod, controls the movement of the piston rod and the abutting piston, and finally adjusts the water flow pressure. The balance plate provides support for the pressure regulating rod, so as 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 adjustment, but also enhances the adaptability of the system to pressure fluctuation, so as to ensure the efficient and stable operation of the water supply system.

[0017] Further, the drainage mechanism comprises a drainage pipe, a filter, an electric conductivity instrument and a backflow box. The drainage pipe is in communication with the water outlet. The filter is in communication with the drainage pipe. The electric conductivity instrument and the backflow box are fastened. The backflow box is in communication with the water supply tank.

[0018] By adopting the above technical scheme, the filter adopts a three-stage filter element structure (80 mesh + 120 mesh + 200 mesh), and the conductivity meter monitors the backflow water quality in real time, and triggers an alarm when the conductivity exceeds 50 μs / cm. The backflow tank is provided with a baffle to form an S-shaped flow channel, so that the sedimentation time of impurities is prolonged to 120 seconds. The drain pipe is made of 304 stainless steel corrugated pipe and can withstand a burst pressure of 2.5 MPa. The medium at the outlet of the valve body enters the filter through the drain pipe, removes particles greater than 50 μm, and then enters the backflow tank. The water body that passes the conductivity detection returns to the water supply tank through the siphon pipe. The structure realizes a detection medium recycling rate of 98%, while ensuring the stability of the system during long-term operation.

[0019] Further, the pressure division adjusting mechanism includes a pilot pressure division pipe, a drain pressure division pipe, a pressure division tank, and a backflow pipe, the pilot pressure division pipe and the pilot port are in communication, the pilot pressure division pipe and the pressure division tank are in communication, the backflow pipe and the pressure division tank are in communication, the backflow pipe and the water supply tank are in communication, the drain pressure division pipe and the pressure division tank are in communication, the drain pressure division pipe and the pressure relief port are in communication, control valves are installed at the connection points of the pilot pressure division pipe, the drain pressure division pipe, and the backflow pipe with the pressure division tank, the pressure division adjusting mechanism further includes a bolt adjusting column, a torque limiting column, a transmission column, an adjusting motor, a limiting elastic element, a limiting electromagnetic block, an adjusting frame, a pressure sensor, and a lifting hydraulic cylinder, the lifting hydraulic cylinder is fixedly connected with the clamping mechanism, the lifting hydraulic cylinder is in transmission connection with the adjusting frame, the adjusting motor is fixedly connected with the adjusting frame, the adjusting motor is in transmission connection with the transmission column, the transmission column is in transmission connection with the torque limiting column, the torque limiting column is fixedly connected with the limiting elastic element, the limiting elastic element is fixedly connected with the bolt adjusting column, the limiting electromagnetic block is fixedly connected with the bolt adjusting column, the limiting electromagnetic block and the torque limiting column repel each other magnetically, the torque limiting column is in transmission connection with the bolt adjusting column, the bolt adjusting column is in transmission connection with the adjusting bolt, a limiting groove is arranged on the torque limiting column, a transmission groove is arranged on the torque limiting column, the transmission groove is L-shaped, and the pressure sensor is fixedly connected with the bolt adjusting column.

[0020] By adopting the above technical scheme, the adjusting motor drives the transmission column to rotate through the harmonic reducer, and the torque limiting column is in sliding fit with the transmission groove under the 0.5 N·m magnetic repulsion torque generated by the limiting electromagnetic block. When the pressure sensor detects that the axial force of the bolt adjusting column exceeds 200 N, the limiting elastic element (disc spring group) is compressed by 2 mm to realize overload protection. The lifting hydraulic cylinder drives the adjusting frame to move vertically by ±15 mm, thereby ensuring accurate alignment of the torque limiting column with the adjusting bolt of the valve to be detected. The system accurately controls the rotation depth (accuracy ±0.01 mm) of the adjusting bolt of the pressure reducing valve according to a preset detection curve by driving the bolt adjusting column to rotate through the adjusting motor, and forms a closed-loop control in cooperation with the real-time feedback of the pressure sensor. The mechanism realizes adjustable torque of 0-5 N·m, and the angle control accuracy is ±0.5°.

[0021] Further, the detection mechanism comprises a pilot pressure gauge, a drainage pressure gauge and a temperature sensor, the pilot pressure gauge is communicated with the pilot port, the drainage pressure gauge is communicated with the pressure relief port, and the temperature sensor is fixedly connected with the clamping mechanism and used for detecting the leakage of the valve body.

[0022] By adopting the technical scheme, the pilot pressure gauge adopts a 0.25-grade precision pressure transmitter with a range of 0-4 MPa, and is connected with the pilot port through a φ6 mm red copper pipe. The drainage pressure gauge is provided with a pulse damper to effectively inhibit the influence of pressure fluctuation on reading. The temperature sensor adopts an infrared array type (8x8 pixels), is installed on the inner side of the clamping jaw, detects the temperature field distribution of the valve body surface, and determines leakage when the local temperature difference exceeds 2 DEG C. In the pressure maintaining stage, by comparing the pressure decay curves (sampling rate 10 Hz) of the pilot port and the pressure relief port and combining temperature abnormal point positioning, a small leakage of 0.1 mm3 / min can be identified. The system realizes a leakage positioning accuracy of ±1.5 mm and a pressure detection error of <±0.1% FS.

[0023] Further, the clamping mechanism comprises an electric slide rail, a clamping jaw, a clamping motor, a Z-shaped block, a pulling rod and a clamping frame, the electric slide rail is fixedly connected with the frame, the electric slide rail is in transmission connection with the clamping frame, the clamping motor is fixedly connected with the clamping frame, the Z-shaped block is in rotation connection with the clamping frame, the clamping motor is in transmission connection with the Z-shaped block, the Z-shaped block is in transmission connection with the pulling rod, and the pulling rod is in transmission connection with the clamping jaw.

[0024] By adopting the technical scheme, the electric slide rail is driven by a linear motor, and the repeat positioning accuracy is ±0.02 mm. The clamping motor drives the Z-shaped block to rotate by 55 DEG through a harmonic reducer, and converts the radial movement (stroke 0-30 mm) of the clamping jaw through the pulling rod. The inner lining of the clamping jaw is a V-shaped polyurethane friction block, which is suitable for clamping DN50-DN200 valve bodies. 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-shaped block to rotate, and through the lever principle, the clamping jaw generates a constant clamping force of 1200 N. The mechanism can complete the clamping of the valve body within 15 seconds, the deflection angle is <0.1 DEG, and the rigidity requirement of high-pressure detection is met.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] 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 the traditional manual adjustment, the mechanism can accurately control the rotation depth of the adjusting bolt of the pressure reducing valve, realize the repeatability and consistency of the detection process, and through the pressure decay curve analysis and temperature field distribution detection, realize the identification and precision positioning of the micro leakage, compared with the traditional detection method, improve the sensitivity and accuracy of the leakage detection, the adjusting motor drives the torque limiting column and the bolt adjusting column to rotate through the transmission column, and accurately adjusts the internal pressure of the pressure reducing valve. The limiting electromagnetic block and the limiting elastic piece protect the system from overload at the critical moment; and by driving the rotating plate to rotate through the docking motor of the docking assembly, the rotating plate drives the docking block to slide through the guide of the rotating sliding groove, and the docking block is attached to the water inlet of the pressure reducing valve. The connecting pipe introduces the water flow, the fixed plate provides stable support, the cooperation block and the expansion block cooperate to clamp the water inlet, and the third elastic piece ensures the stability in dynamic adjustment. The docking assembly can adapt to different diameters of the water inlet, while ensuring the efficiency and sealing of the water flow transmission, significantly improving the compatibility and operation 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 through sliding, realize two-stage pressure regulation of preliminary and fine, and have the function of automatic closing without water flow. The pressure regulating rod is supported by the elastic diaphragm and the fourth elastic piece, and drives the piston rod and the abutting piston through the connecting rod and the hinged rod, further optimizes the water pressure, and the balance plate ensures smooth operation, so that the water pressure regulation accuracy is higher, the response speed is faster, the instantaneous fluctuation is effectively absorbed, the stable operation of the water supply system is ensured, and the purpose of intermittent water supply and bottom unilateral water supply is simulated. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the application;

[0028] Figure 2 It is a schematic diagram of the clamping mechanism structure of the application;

[0029] Figure 3 It is a schematic diagram of the pressure reducing valve body structure of the application;

[0030] Figure 4 It is a schematic diagram of the simulation water supply mechanism structure of the application;

[0031] Figure 5 It is a schematic diagram of the docking assembly structure of the application;

[0032] Figure 6 It is a schematic diagram of the stepped pressure regulating assembly structure of the application;

[0033] Figure 7 It is a schematic diagram of the drainage mechanism structure of the application;

[0034] Figure 8This is a schematic structural diagram of the voltage-dividing regulating mechanism of the present invention;

[0035] Figure 9 This is a schematic diagram of the torque limiting column structure of the present invention;

[0036] Figure 10 This is a schematic diagram of the Z-shaped block structure of the present invention.

[0037] Figure: 1. Pressure reducing valve body; 11. Valve body to be inspected; 111. Water inlet; 112. Water outlet; 113. Pilot port; 114. Pilot chamber; 115. Pressure relief chamber; 116. Pressure relief port; 12. Lower valve cover; 13. Valve stem; 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. Stepped pressure regulating assembly; 211. Pressure 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, hinged rod; 2110, piston rod; 2111, connecting rod; 2112, balance plate; 2113, pressure regulating rod; 22, docking assembly; 221, docking block; 222, rotating plate; 2221, rotating slide; 223, connecting pipe; 224, Fixed plate; 225, matching block; 226, expansion block; 227, third elastic member; 228, docking motor; 23, water pump; 24, water supply tank; 3, drainage mechanism; 31, drainage pipe; 32, filter; 33, conductivity meter; 34, return tank; 4, partial pressure adjustment mechanism; 41, pilot partial pressure pipe; 42, drainage partial pressure pipe; 43, partial pressure box; 44, return pipe; 45, bolt adjustment column; 46, torque limiting column; 461, limiting groove; 46 2. Transmission groove; 47. Transmission column; 48. Adjustment motor; 49. Limiting elastic member; 410. Limiting electromagnetic block; 411. Adjustment frame; 412. Pressure sensor; 413. Lifting hydraulic cylinder; 5. Detection mechanism; 51. Pilot pressure gauge; 52. Drain pressure gauge; 53. Temperature sensor; 6. Clamping mechanism; 61. Electric slide rail; 62. Clamping claw; 63. Clamping motor; 64. Z-block; 65. Pull rod; 66. Clamping frame; 7. Frame. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1 -Figure 10 As shown, the present invention provides a technical solution for an intelligent detection device for pressure relief value of a pressure reducing valve with a step pressure regulating function:

[0040] The detection equipment includes a pressure reducing valve body 1, a simulated water supply mechanism 2, a drainage mechanism 3, a pressure dividing adjustment 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 adjustment 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 pressure dividing adjustment mechanism 4, the detection mechanism 5 and the clamping mechanism 6 are all fastened to the frame 7.

[0041] By adopting the above technical solution, the pressure reducing valve body 1 serves as the core test object. Its water inlet 111 is hard-sealed to the docking assembly 22 of the simulated water supply mechanism 2 via a DN50 flange, and the water outlet 112 is connected to the inlet of the filter 32 of the drainage mechanism 3 via a corrugated hose. The pressure regulating mechanism 4 connects the valve body pilot port 113 and the pressure relief port 116 via a φ8mm stainless steel pipe, achieving pressure distribution control. The pilot pressure gauge 51 of the detection mechanism 5 is connected in parallel to the pilot port 113 via a tee connector, and the drainage pressure gauge 52 is directly mounted 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 valve body flange with a clamping force of 1200N, eliminating vibration displacement during testing. The frame 7 adopts a welded steel structure frame with a T-slot mounting platform on the top. The various mechanisms are modularly fixed using M16 bolts, with a flatness error of ≤0.1μm.

[0042] Further, the pressure relief valve body 1 comprises a valve body 11, a lower valve cover 12, a valve rod 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 11 is communicated with the simulated water supply mechanism 2, the valve body 11 is communicated with the drainage mechanism 3, the clamping mechanism 6 is clamped with the valve body 11, the valve rod 13 is slidably connected with the valve body 11, the valve plate 19 is fixedly connected with the valve rod 13, the valve core 14 is fixedly connected with the valve rod 13, the valve core 14 abuts against the valve body 11, the valve core 14 is a circular truncated cone, 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 11, the first elastic member 16 abuts against the valve rod 13, the first elastic member 16 abuts against the adjusting bolt 15, the adjusting bolt 15 is threadedly connected with the valve body 11, the second elastic member 17 is fixedly connected with the valve rod 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 11, the first elastic member 16 is located at the upper end of the valve body 11, the second elastic member 17 is located at the lower end of the valve body 11, the valve body 11 is provided with a water inlet 111, a water outlet 112, a pilot port 113, a pilot cavity 114, a pressure relief cavity 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 division adjusting mechanism 4, the pilot port 113 is communicated with the pilot cavity 114, the pressure relief port 116 is communicated with the pressure relief cavity 115, and the pilot cavity 114 is located above the pressure relief cavity 115.

[0043] By adopting the technical scheme, the valve body 11 to be detected serves as a main pressure-bearing shell and is in 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 through screw threads to form a closed structure of the pressure relief chamber 115. The valve stem 13 penetrates the center of the valve body in a sliding fit and cooperates with the conical valve core 14 to achieve water flow interruption. The adjusting bolt 15 is screwed into the top of the valve body through screw threads and cooperates with the first elastic member 16 (spring) to form a valve stem 13 pre-tightening force adjusting mechanism. 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, so that the valve core 14 generates 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 valve core 14 reset force 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 of the pilot chamber 114 during the reciprocating motion of the valve stem 13. When the pressure of the water inlet 111 rises, the medium acts on the lower end surface of the valve plate through the pilot chamber 114, pushes the valve stem 13 upward to compress the first elastic member 16, and drives the conical valve core 14 to open the pressure relief passage. The pressure relief chamber 115 is in communication with the pressure division adjusting mechanism 4 through the pressure relief port 116 to realize pressure staged release. This structure can accurately control the opening of the valve core 14 during the detection process, achieve dynamic balance detection effect, and realize two-way pressure compensation through double-spring design, thereby improving the detection accuracy by 35%.

[0044] Further, the simulated water supply mechanism 2 includes 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.

[0045] By adopting the technical scheme, the water pump 23 extracts water from the water source and sends it into the water supply tank 24, and part of the water flow enters the stepped pressure regulating assembly 21 for pressure regulation. The regulated water flow enters the water inlet 111 through the docking assembly 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, thereby ensuring the stability and efficiency of the system.

[0046] Further, 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 in sliding connection. The docking block 221 abuts against the water inlet 111. The connecting pipe 223 and the stepped pressure regulating assembly 21 are in communication. The fixing plate 224 and the connecting pipe 223 are in fastening connection. The matching block 225 and the docking block 221 are in sliding connection. The expansion block 226 and the matching block 225 are in fastening connection. The third elastic member 227 and the docking block 221 are in fastening connection. The third elastic member 227 and the matching block 225 are in fastening connection. The docking motor 228 and the fixing plate 224 are in fastening connection. The docking motor 228 and the rotating plate 222 are in transmission connection. The rotating plate 222 and the fixing plate 224 are both provided with rotating sliding grooves 2221.

[0047] By adopting the above technical scheme, the rotating plate 222 and the docking block 221 are in sliding connection, so that the docking block 221 and the water inlet 111 can be dynamically adjusted, thereby adapting to different docking diameters. The connecting pipe 223 is connected with the stepped pressure regulating assembly 21, so as to ensure that the adjusted water flow can be stably transmitted to the docking assembly 22. The fixing plate 224 fastens the connecting pipe 223 and the docking motor 228, thereby providing stable support for the assembly. The matching block 225 and the docking block 221 are in sliding connection, thereby enhancing the flexibility of water flow adjustment. The expansion block 226 and the matching block 225 are in fastening connection, thereby further clamping the valve body. The third elastic member 227 provides elastic support when the pressure changes, thereby ensuring the stable operation of the system. The docking motor 228 is in transmission connection with the rotating plate 222, thereby accurately controlling the opening and closing size. The rotating plate 222 is in stable rotation through the rotating sliding grooves 2221, thereby ensuring the efficient cooperation of each component in the working process.

[0048] 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 connected to the water pump 23, and 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 abut and slide, and the second pressure regulating piston 213 and the fourth elastic member 217 are tightly connected. The fourth elastic member 217 and the pressure regulating box 211 are firmly connected, the first electromagnetic block 215 and the pressure regulating box 211 are firmly connected, the first electromagnetic block 215 and the first magnetic block 216 are magnetically attracted to each other for transmission, the elastic diaphragm 214 and the pressure regulating rod 2113 are firmly connected, the pressure regulating rod 2113 and the first pressure regulating piston 212 are firmly connected, the connecting rod 2111 and the hinged rod 219 are both hinged to the pressure regulating rod 2113, the balance plate 2112 and the pressure regulating rod 2113 are firmly connected, the hinged rod 219 and the piston rod 2110 are transmission-connected, the piston rod 2110 and the abutting piston 218 are transmission-connected, and the abutting piston 218 and the pressure regulating box 211 are slidingly abutted.

[0049] By adopting the above technical solution, the pressure regulating box 211 is connected to the water pump 23, receiving water flow and regulating pressure through the slidingly connected first and second pressure regulating pistons 212 and 213, ensuring that the water pressure remains within the appropriate range. The elastic diaphragm 214 and the fourth elastic member 217 provide elastic response, absorbing transient fluctuations in the water flow and preventing system failure due to pressure fluctuations. The first electromagnetic block 215 and the first magnetic block 216 attract each other magnetically, precisely controlling the movement of the piston and automatically regulating the water pressure. The pressure regulating rod 2113, through cooperation with the connecting rod 2111 and the hinged rod 219, accurately transmits regulation information, controls the movement of the piston rod 2110 and the abutting piston 218, and ultimately regulates the water pressure. The balance plate 2112 provides support for the pressure regulating rod 2113, ensuring stable system operation. The tight coordination of these components not only improves the accuracy and response speed of water flow regulation, but also enhances the system's adaptability to pressure fluctuations, ensuring the efficient and stable operation of the water supply system.

[0050] 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 connected to the water outlet 112, the filter 32 is connected to the drain pipe 31, the conductivity meter 33 and the return box 34 are fastened together, and the return box 34 is connected to the water supply tank 24.

[0051] By adopting the above technical scheme, the filter 32 adopts a three-stage filter element structure (80 mesh + 120 mesh + 200 mesh), the conductivity meter 33 monitors the backflow water quality in real time, and triggers an alarm when the conductivity exceeds 50 μs / cm. The backflow tank 34 is provided with a baffle to form an S-shaped flow channel, so that the sedimentation time of impurities is prolonged to 120 seconds. The drain pipe 31 is made of 304 stainless steel corrugated pipe and can withstand a burst pressure of 2.5 MPa. The medium at the water outlet 112 of the measured valve body enters the filter 32 through the drain pipe 31, removes >50 μm particulate matter, and then enters the backflow tank 34. The water body that passes the conductivity detection returns to the water supply tank 24 through the siphon pipe. The structure realizes a detection medium recycling rate of 98%, while ensuring the stability of the system during long-term operation.

[0052] Further, the pressure division adjusting mechanism 4 includes a pilot pressure division pipe 41, a drain pressure division pipe 42, a pressure division tank 43, and a backflow pipe 44. The pilot pressure division pipe 41 communicates with the pilot port 113, the pilot pressure division pipe 41 communicates with the pressure division tank 43, the backflow pipe 44 communicates with the pressure division tank 43, the backflow pipe 44 communicates with the water supply tank 24, the drain pressure division pipe 42 communicates with the pressure division tank 43, the drain pressure division pipe 42 communicates with the pressure relief port 116, and the pilot pressure division pipe 41, the drain pressure division pipe 42, and the backflow pipe 44 are all provided with control valves at the connection positions with the pressure division tank 43. The pressure division adjusting mechanism 4 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 electromagnetic block 410, an adjusting frame 411, a pressure sensor 412, and a lifting hydraulic cylinder 413. The lifting hydraulic cylinder 413 is fixedly connected with 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 with 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 with the limiting elastic member 49, the limiting elastic member 49 is fixedly connected with the bolt adjusting column 45, the limiting electromagnetic block 410 is fixedly connected with the bolt adjusting column 45, the limiting electromagnetic block 410 and the torque limiting column 46 are in repulsion transmission, 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, 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 is fixedly connected with the bolt adjusting column 45.

[0053] By adopting the above technical scheme, the 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 0.5 N·m magnetic repulsion torque generated by the limiting electromagnetic block 410. When the pressure sensor 412 detects that the axial force of the bolt adjusting column 45 exceeds 200 N, the limiting elastic element 49 (disc spring group) is compressed by 2 mm to realize overload protection. The lifting hydraulic cylinder 413 drives the adjusting frame 411 to move vertically by ±15 mm, ensuring that the torque limiting column 46 is accurately aligned with the adjusting bolt 15 of the valve body 11 to be detected. According to the preset detection curve, the system drives the bolt adjusting column 45 to rotate through the adjusting motor 48, accurately controls the rotation depth (accuracy ±0.01 mm) of the reducing valve adjusting bolt 15, and cooperates with the pressure sensor 412 to realize real-time feedback and form a closed-loop control. The mechanism realizes adjustable torque of 0-5 N·m, and the angle control accuracy is ±0.5°.

[0054] Further, the detection mechanism 5 includes a pilot pressure gauge 51, a drainage pressure gauge 52, and a temperature sensor 53. The pilot pressure gauge 51 is in communication with the pilot port 113, the drainage pressure gauge 52 is in communication with the pressure relief port 116, and the temperature sensor 53 is fixedly connected with the clamping mechanism 6. The temperature sensor 53 is used for detecting the leakage of the valve body 11 to be detected.

[0055] By adopting the above technical scheme, the pilot pressure gauge 51 adopts a 0.25-grade precision pressure transmitter with a range of 0-4 MPa, and is connected with the pilot port 113 through a φ6 mm copper pipe. The drainage pressure gauge 52 is equipped with a pulse damper to effectively suppress the influence of pressure fluctuation on the reading. The temperature sensor 53 adopts an infrared array type (8×8 pixels) and is installed on the inner side of the clamping jaw 62. When the local temperature difference exceeds 2℃, it is determined that there is leakage. During the pressure maintaining stage, by comparing the pressure decay curves (sampling rate 10 Hz) of the pilot port 113 and the pressure relief port 116, and combining the temperature abnormal point positioning, a small leakage of 0.1 mm³ / min can be identified. The system realizes a leakage positioning accuracy of ±1.5 mm and a pressure detection error of <±0.1% FS.

[0056] Further, the clamping mechanism 6 includes an electric sliding rail 61, a clamping jaw 62, a clamping motor 63, a Z-shaped block 64, a pulling rod 65, and a clamping frame 66. The electric sliding rail 61 is fixedly connected with the rack 7, the electric sliding rail 61 and the clamping frame are in transmission connection, the clamping motor 63 is fixedly connected with the clamping frame 66, the Z-shaped block 64 is rotationally connected with the clamping frame 66, the clamping motor 63 is in transmission connection with the Z-shaped block 64, the Z-shaped block 64 is in transmission connection with the pulling rod 65, and the pulling rod 65 is in transmission connection with the clamping jaw 62.

[0057] By adopting the above technical scheme, the electric slide rail 61 is driven by a linear motor, and the repeated positioning accuracy is ±0.02 mm. The clamping motor 63 drives the Z-shaped block 64 to rotate 55° through a harmonic reducer, and converts the radial motion (stroke 0-30 mm) of the clamping jaw 62 through the pull rod 65. The clamping jaw 62 is lined with V-shaped polyurethane friction blocks, and is suitable for clamping DN50-DN200 valve bodies. The system automatically adjusts the position of the electric slide rail 61 according to the size of the valve body, the clamping motor 63 drives the Z-shaped block 64 to rotate, and through the lever principle, the clamping jaw 62 generates a constant clamping force of 1200N. The mechanism can complete the valve body clamping within 15 seconds, the deflection angle is less than 0.1°, and meets the rigidity requirement of high-pressure detection.

[0058] The working principle of the application is as follows:

[0059] By adjusting the real-time feedback of the screw adjusting column 45 driven by the motor 48 and the pressure sensor 412, a closed-loop control system is formed. Compared with traditional manual adjustment, the mechanism can accurately control the rotation depth of the adjusting screw 15 of the pressure reducing valve, greatly improve the repeatability and consistency of the detection process, and use infrared array temperature sensing sensor 53 and high-precision pressure gauge to realize the identification and precision positioning of micro leakage through pressure decay curve analysis and temperature field distribution detection. Compared with the traditional detection method, the sensitivity and accuracy of the leakage detection are improved. The adjusting motor 48 drives the torque limiting column 46 and the screw adjusting column 45 to rotate through the transmission column 47, and accurately adjusts the internal pressure of the pressure reducing valve. The limiting electromagnetic block 410 and the limiting elastic element 49 protect the system from overload at the critical moment; and the rotating plate 222 is driven to rotate by the docking motor 228 of the docking assembly 22, and the docking block 221 is driven to slide by the rotating sliding groove 2221, and the rotating plate 222 is driven to slide by the rotating sliding groove 2221. The water inlet 111 of the pressure reducing valve is fitted. The connecting pipe 223 introduces water flow, the fixed plate 224 provides stable support, the matching block 225 and the expansion block 226 cooperate to clamp the water inlet 111, and the third elastic element 227 ensures the stability in dynamic adjustment. The docking assembly 22 can adapt to different diameters of the water inlet 111, while ensuring the efficiency and sealing of the water flow transmission, and 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 passage by sliding, realize two-stage pressure regulation of preliminary and fine, and have the function of automatic closing without water flow. The adjusting rod 2113 is supported by the elastic diaphragm 214 and the fourth elastic element 217, drives the piston rod 2110 and the abutting piston 218 through the connecting rod 2111 and the hinged rod 219, further optimizes the water pressure, and balances the plate 2112 to ensure smooth operation, so that the water pressure regulation accuracy is higher, the response speed is faster, the instantaneous fluctuation is effectively absorbed, the stable operation of the water supply system is ensured, and the purpose of simulating intermittent water supply and bottom unilateral water supply is achieved.

[0060] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. An intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function, characterized by: 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 and connected to the pressure reducing valve body (1); 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 fastened and connected to the frame (7); 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 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) abut and slide; the second pressure regulating piston (213) and the fourth elastic member (217) are fastened together; 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 attracted to each other, 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 in sliding abutment with each other.

2. The intelligent pressure relief value detection device for a pressure reducing valve with a step pressure regulating function according to claim 1, 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 to be inspected (11) are in contact, 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 to be inspected (11) are in sliding connection, the first elastic member (16) and the valve stem (13) are in contact, the first elastic member (16) and the adjusting bolt (15) are in contact, the adjusting bolt (15) and the valve body to be inspected are in contact. (11) is threadedly connected, the second elastic member (17) is fastened to the valve stem (13), the second elastic member (17) is fastened to the lower valve cover (12), the lower valve cover (12) is threadedly connected to 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), and the valve body to be inspected (11) is provided with a water inlet (111), a water outlet (112), a pilot port (113), a pilot cavity (114 ), a pressure relief chamber (115) and a pressure relief port (116), the water inlet (111) is in communication with the simulated water supply mechanism (2), the water outlet (112) is in communication with the drainage mechanism (3), the pilot port (113) is in communication with the detection mechanism (5), the pilot port (113) is in communication with the partial pressure regulating mechanism (4), the pilot port (113) is in communication with the pilot chamber (114), the pressure relief port (116) is in communication with the pressure relief chamber (115), and the pilot chamber (114) is 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, characterized in that: The water pump (23) is in communication with the water supply tank (24), the water supply tank (24) is in communication with the drainage mechanism (3), the water pump (23) is in communication with the step pressure regulating assembly (21), the step pressure regulating assembly (21) is in communication with the docking assembly (22), and the docking assembly (22) is in communication with the water inlet (111).

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 fixed 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 fixed plate (224) and the connecting pipe (223) are firmly connected; The matching block (225) and the docking block (221) are slidably connected, the expansion block (226) and the matching block (225) are fastened, the third elastic member (227) and the docking block (221) are fastened, the third elastic member (227) and the matching block (225) are fastened, the docking motor (228) and the fixed plate (224) are fastened, 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, 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 connected to the water outlet (112); the filter (32) is connected to the drainage pipe (31); the conductivity meter (33) is fixedly connected to the return box (34); and the return box (34) is connected to the water supply tank (24).

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 pressure dividing regulating mechanism (4) 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 in communication with the pilot port (113); the pilot pressure dividing pipe (41) is in communication with the pressure dividing box (43); the return pipe (44) is in communication with the pressure dividing box (43); the return pipe (44) is in communication with the water supply box (24); the drainage pressure dividing pipe (42) is in communication with the pressure dividing box (43); the drainage pressure dividing pipe (42) is in communication with the pressure relief port (113); 6), the pilot pressure dividing pipe (41), the drainage pressure dividing pipe (42), the return pipe (44) are all connected to the pressure dividing box (43) with a control valve installed, the pressure dividing regulating mechanism (4) further includes a bolt regulating column (45), a torque limiting column (46), a transmission column (47), an regulating motor (48), a limiting elastic member (49), a limiting electromagnetic block (410), an adjusting frame (411), a pressure sensor (412) and a lifting hydraulic cylinder (413), the lifting hydraulic cylinder (413) and the clamping mechanism (6 ) is fastened and connected, the lifting hydraulic cylinder (413) and the adjustment frame (411) are transmission-connected, the adjustment motor (48) and the adjustment frame (411) are fastened and connected, the adjustment motor (48) and the transmission column (47) are transmission-connected, the transmission column (47) and the torque limiting column (46) are transmission-connected, the torque limiting column (46) and the limiting elastic member (49) are fastened and connected, the limiting elastic member (49) and the bolt adjustment column (45) are fastened and connected, the limiting electromagnetic block (410) and the bolt adjustment column ( 45) is fastened and connected, the limiting electromagnetic block (410) and the torque limiting column (46) are magnetically repelled and transmitted, the torque limiting column (46) and the bolt adjustment column (45) are transmission-connected, the bolt adjustment column (45) and the adjustment bolt (15) are transmission-connected, a limiting groove (461) is provided on the torque limiting column (46), a transmission groove (462) is provided on the torque limiting column (46), and the transmission groove (462) is L-shaped, and the pressure sensor (412) and the bolt adjustment column (45) are fastened and connected.

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 detection mechanism (5) includes 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), and the temperature sensor (53) is tightly connected to the clamping mechanism (6). The temperature sensor (53) is used to detect leakage of the valve body (11) to be inspected.

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 clamping mechanism (6) includes 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), wherein the electric slide rail (61) and the frame (7) are fastened together, the electric slide rail (61) and the clamping frame (66) are transmission-connected, the clamping motor (63) and the clamping frame (66) are fastened together, 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.

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