A high-precision dynamic torque intelligent control comprehensive test system for static pressure burst and pressurized thermal cycling of valves with a nominal diameter of DN50 and below

Abstract

A high-precision dynamic torque intelligent control comprehensive test system for static pressure bursting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below. A mechanical combination unit is composed of a quick-installation static pressure test unit, a bursting and pressurized thermal cycling test unit, and a high-precision dynamic torque cycling test unit. The mechanical combination unit realizes control and interaction through pipelines and communication connections with the intelligent control operation combination unit. The advantages are as follows: integrating the functions of a quick-installation static pressure test unit, a bursting-pressurized thermal cycling test unit, and a high-precision dynamic torque cycling test unit into an integrated test bench, adopting an integrated multi-station structure, with complete equipment functions, a refined and small structure, and high integration, greatly reducing the cost of test tooling, solving the test installation problems of diverse end connections such as threads, butt welding, socket welding, compression fittings, flanges, and non-standard connections for small-diameter valves with a nominal diameter of DN50 and below, and meeting the reliability test requirements for static pressure, bursting, pressurized thermal cycling, and dynamic torque of valves with a nominal diameter of DN50 and below.

Description

Technical Field

[0001] This invention patent relates to the field of valve testing, and particularly to a high-precision dynamic torque intelligent control integrated test system for hydrostatic bursting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below. Background Art

[0002] At present, the testing devices for valves with a nominal diameter of DN50 and below on the market have the following deficiencies and lags: single function, high development cost of customized devices, low measurement accuracy, low automation level, inability to accurately quantify, and easy damage or failure of the valves to be tested. They cannot provide scientific data support for scientific and accurate technical feedback and improvement of product quality, which is one of the main bottlenecks affecting the development of the valve industry with a nominal diameter of DN50 and below and the improvement of product quality. It is also one of the main reasons why valves with a nominal diameter of DN50 and below used in the nuclear power and chemical industries still mainly rely on imports.

[0003] Valves with a nominal diameter of DN50 and below mainly include plumbing valves, instrument valves, compact forged steel valves, general valves, etc., and are widely used in pipeline systems such as nuclear power, chemical industry, water supply and heating systems, electric power, coal chemical industry, gas systems, and instrumentation. They play a key control role in the medium transportation in the pipeline system. The quality of these valves directly affects the operation and maintenance, safety, reliability, and energy consumption of the entire pipeline system.

[0004] In the Special Equipment Catalog of China, it is stipulated that valves with a nominal diameter of DN50 and above belong to the pressure pipeline components of special equipment and are included in the supervision scope and need to obtain production licenses and type tests under the conditions of meeting the medium and pressure. There is a gap in the supervision of valves with a nominal diameter of DN50 and below. Basically, it depends on market or industry access, that is, factory self-inspection before leaving the factory, customer acceptance, voluntary certification, etc. Under the current situation of fierce bad competition in the market price, this is one of the main reasons for the uneven quality of valve products with a nominal diameter of DN50 and below on the market.

[0005] For valve products below DN50, technical performance indicators such as static pressure, burst, pressurized thermal cycle, and dynamic torque tests are some of the key indicators for evaluating the reliability of these valve products. In the market, there are many pressure testing machine equipment for valves above DN50, while there are few testing devices for valves below DN50, with single functions and low testing efficiency. For example, for the pressure testing machines commonly applicable to valves below DN50, the products supplied in the market generally have relatively single functions and insufficient development of customized equipment. Most enterprises adopt self-designed and fabricated simple toolings according to the characteristics of the valve products they produce to reduce costs and improve efficiency, such as the cylinder top pressure + sealing disc tooling that can only test low-pressure gas media. These toolings solve some problems of low testing efficiency, but there are major defects in aspects such as measurement stability, measurement accuracy, measurement safety, inability to accurately quantify, and narrow testing range, and they cannot meet the comprehensive, automated, high-precision, high-reliability testing and safety requirements such as large-range static pressure testing, burst testing, and high-precision dynamic torque cycle testing demanded by the market; this is another major reason for the large number of purchases of testing equipment for valve products below DN50, high input costs, as well as the low reliability, uneven quality of these valve products, limited development of domestic products, and the main dependence on imports for high-end products.

[0006] For the key indicator torque test of valve products below DN50, currently, torque wrenches or simple torque sensors + motor drives are basically used for torque testing. There are common problems such as rough testing processes, low precision, low adaptability to the manual drive devices of the valves to be tested, and inability to accurately characterize dynamic process data. Especially for the simple torque sensor + motor drive torque test, the torque test accuracy is low, and the inertia of the driving force during the opening and closing processes is extremely likely to cause damage to valve components such as over-range / overload, and problems such as inability to close tightly and inability to run continuously often occur in this testing method, resulting in time-consuming and laborious tests, equipment failures, damage to the valves to be tested, and chaotic and distorted torque result data. Summary of the Invention

[0007] The purpose of the present invention is to solve the existing technical problems, and a high-precision dynamic torque intelligent control comprehensive testing system for static pressure burst and pressurized thermal cycle of valves DN50 and below is proposed.

[0008] To achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A high-precision dynamic torque intelligent control comprehensive test system for static pressure bursting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below, including a quick-installation static pressure test unit, a bursting and pressurized thermal cycling test unit, a high-precision dynamic torque cycling test unit, and an intelligent control operation combination unit. The quick-installation static pressure test unit, the bursting and pressurized thermal cycling test unit, and the high-precision dynamic torque cycling test unit form a mechanical combination unit, and the mechanical combination unit realizes control and interaction through pipelines and communication connections with the intelligent control operation combination unit.

[0010] Further, the quick-installation static pressure test unit includes a double-ear drainage tank, a first manual needle valve, a second manual needle valve, a first pressure gauge, a handwheel screw, an L-shaped mounting bracket, a bottom plate, a sealing disc, a valve under test, a pressure-bearing steel plug, a large thrust cylinder, a cylinder control unit. The first manual needle valve, the second manual needle valve, and the first pressure gauge are installed at one end of the test bench. A double-ear drainage tank is provided below the test bench. A drain port is provided at the lower end of one side of the double-ear drainage tank, and a drain valve for controlling the drain port is provided on the drain port. The front end of the first manual needle valve is connected to the first pressure inlet, and the rear end of the first manual needle valve is selectively connected between the first high-pressure quick connection port and the second high-pressure quick connection port. The ear at the upper end of the other side of the double-ear drainage tank is connected to one end of the second manual needle valve through a pipeline, and the other end of the second manual needle valve is connected to the first pressure gauge. The bottom plate is fixedly connected to the test bench, and two symmetrical L-shaped mounting bracket mounting grooves are formed on the bottom plate. Two L-shaped mounting brackets are symmetrically installed in the corresponding L-shaped mounting bracket mounting grooves; the large thrust cylinder is installed on the left L-shaped mounting bracket; the handwheel screw is installed on the right L-shaped mounting bracket; an inlet, a pressure relief, and a leak detection channel are arranged in the sealing disc. One sealing disc is installed on the right side of the large thrust cylinder, and the other sealing disc is installed on the left side of the handwheel screw; the valve under test is placed between the two sealing discs. The pressure-bearing steel plug is a flat steel plate structure with a U-shaped notch in the middle of the lower part and a lug in the upper part, and is arranged at the position where the extended shaft of the large thrust cylinder is behind one sealing disc; the cylinder control unit is connected to the large thrust cylinder through an air source hose to control the large thrust cylinder; the first high-pressure quick connection port and the second high-pressure quick connection port are respectively connected to the sealing discs at both ends of the valve under test.

[0011] Furthermore, the blasting and pressure - thermal cycling test unit includes a third manual needle valve, a fourth manual needle valve, a second pressure gauge, a small heating table with a heat - insulating cover and a high - pressure protective cover, a test piece, a pipe - clamping and fixing tooling, connecting pipe fittings, the third manual needle valve, the fourth manual needle valve, and the second pressure gauge are installed at the other end of the test bench. The front end of the fourth manual needle valve is connected to the second pressure inlet, and the rear end of the fourth manual needle valve is selectively connected between the third high - pressure quick - connection port and the fourth high - pressure quick - connection port. The ear at the upper end of the other side of the double - ear drainage tank is connected to one end of the third manual needle valve through a pipe, and the second pressure gauge is connected to the rear end of the fourth manual needle valve; the small heating table with a heat - insulating cover and a high - pressure protective cover is fixed above the test bench, and the test piece is placed on the small heating table with a heat - insulating cover and a high - pressure protective cover and is covered by the heat - insulating cover and the high - pressure protective cover; one end of the test piece is connected to one end of a connecting pipe fitting, and the other end of the test piece is connected to one end of another connecting pipe fitting; the connecting pipe fittings are used to connect the test piece; the pipe - clamping and fixing tooling fixes and locks the connecting pipe fittings and the test valve, the third high - pressure quick - connection port is placed at the other end of one connecting pipe fitting; the fourth high - pressure quick - connection port is placed at the other end of the other connecting pipe fitting.

[0012] Furthermore, the high - precision dynamic torque cycling test unit includes a guide rail, a lockable slider, a column, a support block, a cross - column, a mounting support plate, a motor - reducer integrated machine, a precision coupling, a high - precision torque sensor, and a connecting tooling. The guide rail is installed on the test bench, the lockable slider is installed on the guide rail, the column is installed on the lockable slider, the support block is installed on the column and can move up and down along the column and be locked, the cross - column is installed on the support block, the mounting support plate is installed on the cross - column and can move left and right along the cross - column and be locked, and the motor - reducer integrated machine is provided on the mounting support plate; the motor - reducer integrated machine is connected to the high - precision torque sensor through a precision coupling below, and measures the opening and closing drive and dynamic torque of the test valve; the connecting tooling is placed below the high - precision torque sensor, and the connecting tooling connects the first test valve.

[0013] Furthermore, the intelligent control operation combination unit includes a water tank, a gas-liquid booster pump, a first one-way valve, a second one-way valve, a continuous metering pump, a gas cylinder group, a pressure reducing valve, a fifth manual needle valve, a sixth manual needle valve, a seventh manual needle valve, a ninth manual needle valve, a tenth manual needle valve, an accumulator, a first solenoid valve, a second solenoid valve, a first pressure sensor, a second pressure sensor, a third pressure gauge, a fourth pressure gauge, a first test piece, and a PLC digital control system; one end of the gas-liquid booster pump and one end of the continuous metering pump are connected to a water pipe, and the water pipe extends into the water tank. The gas-liquid booster pump and the continuous metering pump are in parallel. One end of the second one-way valve is connected to the other end of the continuous metering pump, and one end of the first one-way valve is connected to the other end of the gas-liquid booster pump; the other end of the first one-way valve is connected to the accumulator and a pipeline, and the other end of the second one-way valve is connected to the pipeline. The pipeline is connected to one end of the fifth manual needle valve, one end of the sixth manual needle valve, one end of the seventh manual needle valve, one end of the ninth manual needle valve, and one end of the tenth manual needle valve. The other end of the fifth manual needle valve is connected to the pressure reducing valve, and the pressure reducing valve is installed at the gas outlet of the gas cylinder group; the other end of the sixth manual needle valve is connected to the first solenoid valve, and the first solenoid valve is placed in the manual needle valve parallel circuit in front of the first test piece; the other end of the tenth manual needle valve is connected to the second solenoid valve, and the second solenoid valve is placed in the manual needle valve parallel circuit behind the first test piece. The first pressure sensor is connected to the third pressure gauge and placed at the rear end of the manual needle valve parallel circuit in front of the first test piece; the second pressure sensor is connected to the fourth pressure gauge and placed at the front end of the manual needle valve parallel circuit behind the first test piece; the PLC digital control system is placed in the intelligent control operation combination unit to control and collect data from the high-precision torque sensor, the gas-liquid booster pump, the continuous metering pump, the first solenoid valve, the second solenoid valve, the first pressure sensor, and the second pressure sensor.

[0014] Furthermore, an optional graduated cylinder and a laser bubble leak detector are connected to the intelligent control operation combination unit through a first quick connection port, a second quick connection port, a third quick connection port, and a fourth quick connection port for leak detection. The first quick connection port, the second quick connection port, the third quick connection port, and the fourth quick connection port are arranged at both ends of the first test piece.

[0015] Furthermore, the connection tooling includes a grooved sleeve, a connection disk, and a tooling; the grooved sleeve is connected below the high-precision torque sensor, and the connection disk is installed below the grooved sleeve and connected to the grooved sleeve through a connection shaft. A through groove is opened at the bottom of the connection disk, and the tooling is fixed in the through groove and connected to a small-diameter valve.

[0016] Furthermore, the tooling includes a two-limb tooling and a single-limb tooling. The two-limb tooling is connected to a small-diameter valve that drives a T-shaped handle during the opening and closing cycle and high-precision dynamic torque test; the single-limb tooling is connected to a small-diameter valve that drives a ┒-shaped handle during the opening and closing cycle and high-precision dynamic torque test.

[0017] Further, it further includes a safety protection isolation unit, which includes a fixed protection plate, a first movable protection plate, a second movable protection plate, a third movable protection plate, a liftable protection plate, a liftable protection plate control unit, a double-acting cylinder, and a test bench. The fixed protection plate is fixed on the test bench to isolate the high-precision dynamic torque cycle test unit from the quick-installation static pressure test unit, the blasting and pressure-holding thermal cycle test unit; the first movable protection plate, the second movable protection plate, and the third movable protection plate are placed on the upper edge of the test bench on the periphery of the quick-installation static pressure test unit and the blasting and pressure-holding thermal cycle test unit, and form a quadrilateral with the fixed protection plate; the liftable protection plate is placed between the quick-installation static pressure test unit and the blasting and pressure-holding thermal cycle test unit, and the double-acting cylinder is driven by the liftable protection plate control unit to lift the liftable protection plate.

[0018] Further, the intelligent control operation combination unit further includes an eighth manual needle valve and an eleventh manual needle valve. The pipeline is also connected to the eighth manual needle valve, and one end of the eighth manual needle valve is placed in the first water tank; the tenth manual needle valve and the second solenoid valve are also connected to the eleventh manual needle valve, and one end of the eleventh manual needle valve is connected to the water tank.

[0019] The beneficial effects of the present invention are as follows: 1) The present invention integrates the functions of a quick-installation static pressure test unit, a blasting-pressure-holding thermal cycle test unit, and a high-precision dynamic torque cycle test unit into an integrated test bench. It adopts an integrated multi-station structure, with complete equipment functions, a refined and small structure, and high integration. It greatly reduces the cost of test tooling, solves the test installation problems of various end connections such as threads, butt welding, socket welding, compression fittings, flanges, and non-standard connections for small-diameter valves with a diameter of DN50 and below, and meets the reliability test requirements of static pressure, blasting, pressure-holding thermal cycle, and dynamic torque for valves below DN50.

[0020] The equipment of the present invention has diverse functions, is low-carbon and efficient, and solves the industry's common technical problems that "most of the testing devices in the market are for single functions such as pulse tests, fatigue tests, and pressure tests for pipe fittings. There is no report on high-precision multi-functional test equipment for hydrostatic pressure / blasting tests / dynamic torque cycles of valves below DN50, and it cannot meet the reliability test requirements of valves below DN50 specified in standards such as ASTM F1387, GB / T 8464, and JB / T 7746".

[0021] 3) The present invention has complete functions, is safe and reliable, and has low costs. In the quick-installation static pressure test unit, a pressure-bearing steel plug plate with a U-shaped notch in the middle and lugs on the upper part is designed to make up for and solve the problems of insufficient cylinder thrust during high-pressure water tests and the adverse problems of increased costs and occupied space caused by larger cylinders.

[0022] 4) The present invention features high automation, intelligence, and convenient operation. Through the intelligent control operation combination unit of the system, it can conveniently achieve intelligent control, real-time data acquisition, analysis, and processing of the operation and test processes of static pressure, bursting, pressure-bearing thermal cycling, and dynamic torque for valves below DN50. It can also access AI plugins to achieve intelligent voice control and data recognition.

[0023] 5) The present invention has high precision, automated flexible design, and reliable functions. Aiming at the driving difficulties in the dynamic testing of common manual devices such as handwheels, T-shaped handles, and ┒-shaped handles for small-diameter valves including DN50 and below, a high-precision dynamic torque cycling test unit with two-limb type tooling and single-limb type tooling connected to the system is designed, as well as a flexible structure with a freely liftable column and a freely horizontally movable cross-column to meet the test requirements of multiple workstations and achieve high-precision torque dynamic detection of the product under test. Among them, in the high-precision dynamic torque cycling test process, in view of the valve type characteristics "characteristics of multi-turn valves such as gate valves and part-turn valves such as ball valves", "number of turns and angle switch prediction control" and "set torque prediction switch in-place control" double high-precision high / valve matching opening and closing cycle program controls are designed, with over-torque overload protection, alarm response, 5% to 20% remaining number of turns speed reduction protection, and over-set torque but not reaching the alarm torque speed reduction protection high-precision auxiliary design, solving the problems of low torque test accuracy for common small-diameter valves, valve component damage caused by over-range / overload due to driving inertia during the opening and closing process, and problems such as not closing tightly, not opening, being unable to run continuously, time-consuming, laborious, and low precision.

[0024] 6) The present invention has a safe structure, is low-carbon, clean, and has excellent expandability; a safety protection isolation unit is designed to effectively isolate the quick-installation static pressure test unit, bursting and pressure-bearing thermal cycling test unit, and high-precision dynamic torque cycling test unit to ensure test and personnel safety; a double-L ear drainage tank is designed inside the test bench to prevent the splashing of the pressure-relieving medium after the test and ensure test and personnel safety; connection ports for a laser bubble leak detector, high-pressure gas booster device, etc. are designed and reserved to meet the requirements of high-precision valve seat leak detection and high-pressure gas boosting. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a static pressure bursting and pressure-bearing thermal cycling high-precision dynamic torque intelligent comprehensive test system for valves below DN50.

[0026] Figure 2 It is a schematic structural diagram of the connecting tooling of the two-limb type tooling.

[0027] Figure 3 It is a schematic structural diagram of the connecting tooling of the single-limb type tooling.

[0028] Figure 4 It is a schematic structural diagram of the pipe clamping and fixing tooling.

[0029] Figure 5 It is a schematic diagram of the pressure-bearing steel plug structure.

[0030] 1 is the mechanical combination unit

[0031] 1.1 is the drain port, 1.2 is the drain valve, 1.3 is the double-ear drain tank, 1.4 is the first manual needle valve, 1.5 is the second manual needle valve, 1.6 is the first pressure gauge, 1.28 is the screw with a handwheel, 1.29 is the L-shaped mounting bracket, 1.30 is the bottom plate, 1.31 is the sealing disc, 1.32 is the valve under test, 1.33 is the pressure-bearing steel plug, 1.34 is the large thrust cylinder, 1.36 is the cylinder control unit, B1 is the first inlet pressure port, C1 is the first outlet pressure port, A1 is the first high-pressure quick connection port, D1 is the second high-pressure quick connection port;

[0032] 1.19 is the third manual needle valve, 1.20 is the fourth manual needle valve, 1.21 is the second pressure gauge, 1.22 is the small heating table with a heat-insulating cover and a high-pressure protective cover, 1.23 is the test piece, 1.24 is the pipe clamping and fixing tooling, 1.25 is the connecting pipe fitting, B2 is the second inlet pressure port, C2 is the second outlet pressure port, A2 is the second high-pressure quick connection port, D2 is the second high-pressure quick connection port;

[0033] 1.8 is the guide rail, 1.9 is the slider with a lock, 1.10 is the column, 1.11 is the support block, 1.12 is the cross column, 1.13 is the mounting plate, 1.14 is the motor-reducer integrated machine, 1.15 is the precision coupling, 1.16 is the high-precision torque sensor, 1.17 is the connecting tooling, 1.17.1 is the grooved sleeve, 1.17.2 is the connecting disc, 1.17.3 is the two-leg type tooling, 1.17.4 is the single-leg type tooling; 1.17.5 is the first valve under test;

[0034] 1.7 is the fixed protective plate, 1.18 is the first movable protective plate, 1.26 is the second movable protective plate, 1.35 is the third movable protective plate, 1.27 is the liftable protective plate, 1.37 is the liftable protective plate control unit, 1.38 is the double-acting cylinder, 1.39 is the test bench;

[0035] 2 is the intelligent control operation combination unit

[0036] 2.1 is a water tank, 2.2 is a gas-liquid booster pump, 2.3 is a first check valve, 2.4 is a second check valve, 2.5 is a continuous metering pump, 2.6 is a gas cylinder group, 2.7 is a pressure reducing valve, 2.8 is a fifth manual needle valve, 2.10 is a sixth manual needle valve, 2.12 is a seventh manual needle valve, 2.19 is a ninth manual needle valve, 2.20 is a tenth manual needle valve, 2.15 is an eighth manual needle valve, 2.22 is an eleventh manual needle valve, 2.9 is an accumulator, 2.11 is a first solenoid valve, 2.21 is a second solenoid valve, 2.13 is a first pressure sensor, 2.18 is a second pressure sensor, 2.14 is a third pressure gauge, 2.17 is a fourth pressure gauge, 2.16 is a first test piece, 2.23 is a PLC digital control system, L is a graduated cylinder, LT is a laser bubble leak detector, A3 is a first quick connection port, B3 is a second quick connection port, C3 is a third quick connection port, D3 is a fourth quick connection port. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.

[0038] Embodiment 1 is combined with the attached Figures 1-5 , a static pressure burst and pressurized thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below, includes a quick-installation static pressure test unit, a burst and pressurized thermal cycle test unit, a high-precision dynamic torque cycle test unit, and an intelligent control operation combination unit. The quick-installation static pressure test unit, the burst and pressurized thermal cycle test unit, and the high-precision dynamic torque cycle test unit constitute a mechanical combination unit. The mechanical combination unit 1 realizes control and interaction through pipelines and communication connections with the intelligent control operation combination unit 2.

[0039] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below. The quick-installation static pressure test unit includes a double-ear drainage tank 1.3, a first manual needle valve 1.4, a second manual needle valve 1.5, a first pressure gauge 1.6, a handwheel screw 1.28, an L-shaped mounting bracket 1.29, a bottom plate 1.30, a sealing disc 1.31, a valve under test 1.32, a pressure-bearing steel insert plate 1.33, a large thrust cylinder 1.34, a cylinder control unit 1.36, a first pressure inlet B1, a first pressure outlet C1, a first high-pressure quick connection port A1, and a second high-pressure quick connection port D1; The first manual needle valve 1.4, the second manual needle valve 1.5, and the first pressure gauge 1.6 are installed at one end of the test bench. A double-ear drainage tank is provided below the test bench. A drain port is provided at the lower end of one side of the double-ear drainage tank, and a drain valve for controlling the drain port is provided on the drain port. The first manual needle valve 1.4 and the second manual needle valve 1.5 are connected in parallel. The front end of the first manual needle valve 1.4 is connected to the first pressure inlet B1. The rear end of the first manual needle valve 1.4 selects a connection between the first high-pressure quick connection port A1 and the second high-pressure quick connection port D1. The ear at the upper end of the other side of the double-ear drainage tank is connected to one end of the second manual needle valve 1.5 through a pipeline, and the other end of the second manual needle valve 1.5 is connected to the first pressure gauge 1.6. The bottom plate is fixedly connected to the test bench. Two symmetrical L-shaped mounting bracket mounting grooves are opened on the bottom plate, and two L-shaped mounting brackets 1.29 are symmetrically installed in the corresponding L-shaped mounting bracket mounting grooves; The large thrust cylinder 1.34 is installed on the left L-shaped mounting bracket; The handwheel screw 1.28 is installed on the right L-shaped mounting bracket; The sealing disc 1.31 is provided with an inlet, a pressure relief, and a leak detection channel. One sealing disc 1.31 is installed on the right side of the large thrust cylinder, and the other sealing disc 1.31 is installed on the left side of the handwheel screw; The valve under test 1.32 is placed between the two sealing discs 1.31. The pressure-bearing steel insert plate 1.33 is a flat steel plate structure with a U-shaped notch in the middle of the lower part and a lug in the upper part, and is arranged at the position where the extending shaft of the large thrust cylinder is behind one sealing disc 1.31; The cylinder control unit 1.36 is connected to the large thrust cylinder through an air source hose to control the large thrust cylinder; The first high-pressure quick connection port A1 and the second high-pressure quick connection port D1 are respectively connected to the sealing discs at both ends of the valve under test.

[0040] A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below. The blasting and pressurized thermal cycling test unit includes a third manual needle valve 1.19, a fourth manual needle valve 1.20, a second pressure gauge 1.21, a small heating table 1.22 with a heat-insulating cover and a high-pressure protective cover, a test piece 1.23, a pipe clamping and fixing tooling 1.24, connecting pipe fittings 1.25, a second inlet pressure port B2, a second outlet pressure port C2, a third high-pressure quick-connection port A2, and a fourth high-pressure quick-connection port D2. The third manual needle valve 1.19, the fourth manual needle valve 1.20, and the second pressure gauge 1.21 are installed at the other end of the test bench. The third manual needle valve 1.19 and the fourth manual needle valve 1.20 are connected in parallel. The front end of the fourth manual needle valve 1.20 is connected to the second inlet pressure port B2, and the rear end of the fourth manual needle valve 1.20 is selectively connected between the third high-pressure quick-connection port A2 and the fourth high-pressure quick-connection port D2. One end of the third manual needle valve 1.19 is connected through a pipe to the ear at the upper end of the other side of the double-ear drainage tank. The second pressure gauge 1.21 is connected to the rear end of the fourth manual needle valve 1.20. The small heating table 1.22 with a heat-insulating cover and a high-pressure protective cover is fixed above the test bench, and the test piece 1.23 is placed on the small heating table 1.22 with a heat-insulating cover and a high-pressure protective cover and is covered by the heat-insulating cover and the high-pressure protective cover. One end of the test piece is connected to one end of a connecting pipe fitting 1.25, and the other end of the test piece is connected to one end of another connecting pipe fitting 1.25. The connecting pipe fittings 1.25 are used to connect the test piece. The pipe clamping and fixing tooling 1.24 fixes and locks the connecting pipe fittings and the test valve. The third high-pressure quick-connection port A2 is placed at the other end of one connecting pipe fitting 1.25. The fourth high-pressure quick-connection port D2 is placed at the other end of the other connecting pipe fitting 1.25.

[0041] The second inlet pressure port B2 is connected to the third high-pressure quick-connection port A2, and the second outlet pressure port C2 is connected to the fourth high-pressure quick-connection port D2.

[0042] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below, and a high-precision dynamic torque cycling test unit, comprising a guide rail 1.8, a locked slider 1.9, a column 1.10, a support block 1.11, a cross column 1.12, a mounting plate 1.13, a motor reducer integrated machine 1.14, a precision coupling 1.15, a high-precision torque sensor 1.16, and a connecting tooling 1.17. The guide rail 1.8 is installed on the test bench. The locked slider 1.9 is installed on the guide rail 1.8. The column 1.10 is installed on the locked slider. The support block 1.11 is installed on the column and can move up and down along the column and be locked. The cross column 1.12 is installed on the support block. The mounting plate 1.13 is installed on the cross column and can move left and right along the cross column and be locked. The motor reducer integrated machine 1.14 is provided on the mounting plate 1.13. The lower part of the motor reducer integrated machine 1.14 is connected to the high-precision torque sensor through a precision coupling to measure the opening and closing drive and dynamic torque of the valve under test. The connecting tooling 1.17 is placed below the high-precision torque sensor, and the connecting tooling is connected to the first valve under test 1.17.5.

[0043] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below. The intelligent control operation combination unit 2 includes a water tank 2.1, a gas-liquid booster pump 2.2, a first check valve 2.3, a second check valve 2.4, a continuous metering pump 2.5, a gas cylinder group 2.6, a pressure reducing valve 2.7, a fifth manual needle valve 2.8, a sixth manual needle valve 2.10, a seventh manual needle valve 2.12, a ninth manual needle valve 2.19, a tenth manual needle valve 2.20, an accumulator 2.9, a first solenoid valve 2.11, a second solenoid valve 2.21, a first pressure sensor 2.13, a second pressure sensor 2.18, a third pressure gauge 2.14, a fourth pressure gauge 2.17, a first test piece 2.16, and a PLC digital control system 2.23. One end of the gas-liquid booster pump 2.2 and one end of the continuous metering pump 2.5 are connected to a water pipe, and the water pipe extends into the water tank. The gas-liquid booster pump 2.2 and the continuous metering pump 2.5 are connected in parallel. One end of the second check valve 2.4 is connected to the other end of the continuous metering pump, and one end of the first check valve 2.3 is connected to the other end of the gas-liquid booster pump. The other end of the first check valve 2.3 is connected to the accumulator and the pipeline. The other end of the second check valve 2.4 is connected to the pipeline. The pipeline is connected to one end of the fifth manual needle valve 2.8, one end of the sixth manual needle valve 2.10, one end of the seventh manual needle valve 2.12, one end of the ninth manual needle valve 2.19, and one end of the tenth manual needle valve 2.20. The other end of the fifth manual needle valve 2.8 is connected to the pressure reducing valve 2.7, and the pressure reducing valve 2.7 is installed at the outlet of the gas cylinder group 2.6. The other end of the sixth manual needle valve 2.10 is connected to the first solenoid valve 2.11, and the first solenoid valve 2.11 is placed in the parallel manual needle valve circuit in front of the first test piece 2.16. The other end of the tenth manual needle valve 2.20 is connected to the second solenoid valve 2.21, and the second solenoid valve 2.21 is placed in the parallel manual needle valve circuit behind the first test piece 2.16. The first pressure sensor 2.13 is connected to the third pressure gauge 2.14 and is placed at the rear end of the parallel manual needle valve circuit in front of the first test piece 2.16. The second pressure sensor 2.18 is connected to the fourth pressure gauge 2.17 and is placed at the front end of the parallel manual needle valve circuit behind the first test piece 2.16. The PLC digital control system 2.23 is placed in the intelligent control operation combination unit. The PLC digital control system is placed in the intelligent control operation combination unit to control and collect data from the high-precision torque sensor, gas-liquid booster pump, continuous metering pump, first solenoid valve, second solenoid valve, first pressure sensor, and second pressure sensor.

[0044] A static pressure burst and pressurized thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below. The optional graduated cylinder L and laser bubble leak detector LT are connected to the intelligent control operation combination unit through the first quick connection port A3, the second quick connection port B3, the third quick connection port C3, and the fourth quick connection port D3 for leak detection according to the accuracy requirements of leakage measurement of the first test piece 2.16. The first quick connection port A3, the second quick connection port B3, the third quick connection port C3, and the fourth quick connection port D3 are arranged at both ends of the first test piece 2.16.

[0045] A static pressure burst and pressurized thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below. The connection tooling 1.17 includes a grooved sleeve 1.17.1, a connection disk 1.17.2, and a tooling. The grooved sleeve 1.17.1 is connected below the high-precision torque sensor. The connection disk 1.17.2 is installed below the grooved sleeve and connected to the grooved sleeve through a connecting shaft. A through groove is opened at the bottom of the disk, and the tooling is fixed in the through groove and connected to the small-diameter valve.

[0046] A static pressure burst and pressurized thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below. The tooling includes a two-leg type tooling 1.17.3 and a single-leg type tooling 1.17.4. The two-leg type tooling is connected to the small-diameter valve that drives the T-shaped handle during the opening and closing cycle and high-precision dynamic torque test. The single-leg type tooling is connected to the small-diameter valve that drives the ┒-shaped handle during the opening and closing cycle and high-precision dynamic torque test.

[0047] A static pressure burst and pressurized thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below further includes a safety protection isolation unit. The safety protection isolation unit includes a fixed protection plate 1.7, a first movable protection plate 1.18, a second movable protection plate 1.26, a third movable protection plate 1.35, a liftable protection plate 1.27, a liftable protection plate control unit 1.37, a double-acting cylinder 1.38, and a test bench 1.39. The fixed protection plate 1.7 is fixed on the test bench to isolate the high-precision dynamic torque cycle test unit from the quick-installation static pressure test unit and the burst and pressurized thermal cycle test unit. The first movable protection plate 1.18, the second movable protection plate 1.26, and the third movable protection plate 1.35 are placed at the upper edge of the test bench on the periphery of the quick-installation static pressure test unit and the burst and pressurized thermal cycle test unit, and form a square with the fixed protection plate 1.7. The liftable protection plate 1.27 is placed between the quick-installation static pressure test unit and the burst and pressurized thermal cycle test unit, and the double-acting cylinder is driven by the liftable protection plate control unit to lift the liftable protection plate 1.27.

[0048] A high-precision dynamic torque intelligent control comprehensive test system for hydrostatic burst and pressurized thermal cycle of valves with a nominal diameter of DN50 and below. The intelligent control operation combination unit 2 further includes an eighth manual needle valve 2.15 and an eleventh manual needle valve 2.22. The pipeline is also connected to the eighth manual needle valve 2.15, and one end of the eighth manual needle valve 2.15 is placed in the first water tank. The tenth manual needle valve 2.20 and the second solenoid valve 2.21 are also connected to the eleventh manual needle valve 2.22, and one end of the eleventh manual needle valve 2.22 is connected to the inside of the water tank 2.1.

[0049] A high-precision dynamic torque intelligent control comprehensive test system for hydrostatic burst and pressurized thermal cycle of valves with a nominal diameter of DN50 and below. The double-ear drainage tank is a double-L-ear drainage tank

[0050] A high-precision dynamic torque intelligent control comprehensive test system for hydrostatic burst and pressurized thermal cycle of valves with a nominal diameter of DN50 and below. The quick-installation hydrostatic test unit is used for the quick installation and testing of the pressure resistance and sealing performance of small-diameter plumbing valves or instrument valves with a nominal diameter of DN50 and below at the threaded end, flange end, welded end, ferrule connection, and existing diverse end structures.

[0051] The first manual needle valve and the second manual needle valve are respectively used to control the inlet pressure, pressure holding, pressure release, sealing, and strength testing of the valve under test 1.32. The double-ear drainage tank is a double-L-ear drainage tank, which is used to receive water or gas after hydrostatic testing. Its double-L-ear structure can allow gas to escape from the ears and avoid the splashing of water and gas. A drain port and a drain valve are provided at its lower side. When the liquid level in the water tank is relatively high, part of the water can be discharged through the drain valve. The first pressure gauge is placed at the rear end of the second manual needle valve 1.5 on the inlet pressure pipeline to monitor the test pressure of the valve under test 1.32. The bottom plate provides mechanical positioning and support for the quick-installation hydrostatic test unit. The L-shaped mounting bracket is used to fixedly connect and install the handwheel screw rod and the large-thrust cylinder. The large-thrust cylinder automatically adjusts its expansion, contraction, and thrust according to the structural length and test pressure of the valve under test. The handwheel screw rod is manually adjusted and tightened according to the structural length of the valve under test. The sealing disc is provided with inlet, pressure relief, and leak detection channels inside, which are used to provide sealing guarantee for the test of the valve under test and channels for inlet pressure, pressure relief, and leak detection. The pressure-bearing steel insert plate can make up for and solve the problem of insufficient thrust of the large-thrust cylinder during high-pressure water testing and the increase in cost and occupied space brought by a larger cylinder. The cylinder control unit realizes the precise control of the thrust and expansion / contraction displacement of the large-thrust cylinder. The first high-pressure quick connection port A1 and the second high-pressure quick connection port D1 are respectively connected to the sealing discs at both ends of the valve under test, which are used for the entry or release of the test medium and provide a convenient channel.

[0052] A static pressure bursting and pressurized thermal cycling high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below. The bursting and pressurized thermal cycling test unit is used for high-pressure bursting tests and high-temperature pressurized thermal cycling tests of instrument valves. The third manual needle valve and the fourth manual needle valve are connected in parallel and are respectively used to control the inlet pressure, pressure holding, pressure relief, sealing, strength, and bursting tests of the test piece. The second pressure gauge is placed at the rear end of the fourth manual needle valve 1.20 on the inlet pressure pipeline and is used to monitor the test pressure of the test piece. During the test, the test piece is placed above the small heating table with a heat-insulating cover and a high-pressure protective cover, inside the heat-insulating cover and the high-pressure protective cover, which provides an external heat source, safety protection, and heat insulation protection for the thermal cycling test of the test piece. The pipe clamping and fixing tooling prevent the loosening of the test valve and the connecting pipe fittings during the test, which may affect the normal progress of the test. The third high-pressure quick connection port A2 and the fourth high-pressure quick connection port D2 are placed near the inlet and outlet of the connecting pipe fittings, which is convenient for connecting with the connecting pipe fittings through high-pressure heat-resistant hoses.

[0053] A static pressure bursting and pressurized thermal cycling high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below. The high-precision dynamic torque cycling test unit is used for the opening and closing cycles and high-precision dynamic torque tests of the handwheels, intermediate fulcrum handles, and cantilever fulcrum handles of threaded connection and ferrule connection instrument valves. For the valve type characteristics of multi-turn valves and part-turn valves, a dual high-precision high / valve matching opening and closing cycle program control of the number of turns or angle switch prediction control and set torque prediction switch in-place control is designed in combination with the intelligent control operation combination unit. It has high-precision auxiliary designs such as over-torque overload protection, alarm response, speed reduction protection for the remaining 5% to 20% of the number of turns, and speed reduction protection for the set torque not reaching the alarm torque. It solves the problems of low torque test accuracy of common small-diameter valves, damage to valve components caused by over-range / overload due to the driving force inertia during the opening and closing process, as well as the problems of not closing tightly, not opening, unable to run continuously, time-consuming and laborious tests, and low precision.

[0054] The guide rail is used to control the linear free movement of the column; the slider with a lock is used to control the movement and position locking of the column; the support block can move up and down along the column and be locked; the mounting plate can move left and right along the cross column and be locked, and there is a motor-reducer integrated machine on it; the motor-reducer integrated machine is connected to a high-precision torque sensor through a precision coupling below it to achieve the opening and closing drive of the first valve under test and the precise measurement of the dynamic torque; the connecting device is placed below the high-precision torque sensor and is used to connect the first valve under test; the grooved sleeve is connected below the high-precision torque sensor and can be used for the opening and closing cycle test of the rising stem and non-rising stem valves, providing a rising displacement space and positioning for the opening and closing cycle process of the rising stem valve to avoid misalignment; the connecting plate is connected to the grooved sleeve through a connecting shaft, and a through slot is opened at the bottom of the plate for fixing the two-limb type tooling or single-limb type tooling; the two-limb type tooling is fixed in the through slot at the bottom of the connecting plate and is used to connect the small-diameter valve that drives the T-shaped handle during the opening and closing cycle and high-precision dynamic torque test; the single-limb type tooling is fixed in the through slot at the bottom of the connecting plate and is used to connect the small-diameter valve that drives the ┒-shaped handle during the opening and closing cycle and high-precision dynamic torque test.

[0055] A high-precision dynamic torque intelligent control comprehensive test system for static pressure bursting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below. The intelligent control operation combination unit and the test mechanical combination unit are connected through high-pressure quick connectors, electrical communication lines, etc. The three functional units in the test mechanical combination unit are respectively dynamically operated, monitored, and the characteristic data is displayed and processed in real time through the valves, electrical buttons, and PLC digital control interface in the intelligent control operation combination unit.

[0056] The water tank provides water source for the intelligent control operation combination unit; the gas-liquid booster pump is connected in parallel with the continuous metering pump. The continuous metering pump is used for low-pressure water injection into the first test piece and the pipeline, and the gas-liquid booster pump is used for water pressure boosting after the low-pressure water injection of the first test piece. The two are used in parallel, which can greatly improve the pressurization speed and detection efficiency; the first check valve and the second check valve are respectively placed behind the continuous metering pump and the gas-liquid booster pump to prevent the medium from flowing back; the gas cylinder group, the pressure reducing valve, and the gas booster GB are connected in sequence to provide gas test medium and pressurization for the test valve and the pipeline; the fifth manual needle valve 2.8, the sixth manual needle valve 2.10, the seventh manual needle valve 2.12, the ninth manual needle valve 2.19, the tenth manual needle valve 2.20, the eighth manual needle valve 2.15, and the eleventh manual needle valve 2.22 are placed in the pipelines at the front and rear ends of the first test piece to control the on-off of the flowing medium in the test pipeline; the accumulator is used for stabilizing the pressure of the test pipeline; the solenoid valve realizes the dual functions of automatic and manual interchange and safety protection such as pressurization, pressure relief, and leak detection of the first test piece, improving the reliability of the test system; the first pressure sensor 2.13, the second pressure sensor 2.18, the third pressure gauge 2.14, and the fourth pressure gauge 2.17 are used to monitor the real-time pressure and change amount before and after the test valve; the PLC digital control system is placed in the intelligent control operation combination unit, and controls and collects data from the solenoid valve, the first pressure sensor, the second pressure sensor, the gas-liquid booster pump, the continuous metering pump, the gas booster GB (optional), the motor reduction unit, and the high-precision torque sensor through electrical communication lines, etc., to realize the intelligent control function of the entire test process; the L measuring cylinder or the LT laser bubble leak detector can be conveniently connected to the intelligent control operation combination unit through the first quick connection port A3, the second quick connection port B3, the third quick connection port C3, and the fourth quick connection port D3 for leak detection according to the accuracy requirements of the leak measurement of the test valve.

[0057] A static pressure burst and pressurized thermal cycle high-precision dynamic torque intelligent comprehensive test system for valves with a nominal diameter of DN50 and below. The safety protection isolation unit can achieve the safety isolation of independent tests of 3 functional units and the safety of test personnel; the fixed protection plate effectively isolates the high-precision dynamic torque cycle test unit from the other two units; the liftable protection plate controls the action of the double-acting cylinder through the liftable protection plate control unit, realizes lifting during the test of the test valve and lowering during installation or disassembly, facilitates the installation of the test valve, and ensures the safety of personnel during the test process.

[0058] A high-precision dynamic torque intelligent control comprehensive test system for static pressure bursting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below. The static pressure test unit can be quickly installed. During the static pressure test with water or gas medium, the valve under test is installed between the right end of the extending shaft of the large thrust cylinder and the sealing disc at the left end of the screw with a handwheel. The cylinder control unit and the screw with a handwheel are operated to pre-tighten both ends of the valve under test to ensure no leakage during the test process. The first high-pressure quick connection port A1 and the second high-pressure quick connection port D1 are connected to the corresponding connection ports in the intelligent control operation combination unit 2. The gas-liquid booster pump, continuous metering pump or gas booster GB, first solenoid valve 2.11, second solenoid valve 2.21, first pressure sensor 2.13, and second pressure sensor 2.18 in the intelligent control operation combination unit 2 are automatically controlled by the PLC digital control system to realize intelligent control processes such as automatic liquid or gas medium pressurization / depressurization / data acquisition and processing. When the pre-tightening force required at both ends of the valve under test 1.32 for the test pressure is greater than the range of the large thrust cylinder, a pressure-bearing steel insert plate is placed at the rear of the sealing disc on the extending shaft of the large thrust cylinder, and the screw with a handwheel is operated to lock the other end of the valve under test 1.32 to ensure the reliability of the high-pressure static pressure test connection, effectively making up for the insufficient thrust of the large thrust cylinder and the problems of overall increase in equipment size and significant increase in cost brought by larger-sized cylinders.

[0059] Bursting - pressurized thermal cycling test unit. During the bursting test, the test piece 1.23 is firmly connected to the connecting pipe fittings, placed on a small heating table with a heat-insulating cover and a high-pressure protective cover, and fixed tightly with a pipe clamping fixture. The third high-pressure quick connection port A2 and the fourth high-pressure quick connection port D2 are connected to the corresponding connection ports in the intelligent control operation combination unit 2. The gas-liquid booster pump, continuous metering pump or gas booster GB, first solenoid valve 2.11, second solenoid valve 2.21, first pressure sensor 2.13, and second pressure sensor 2.18 in the intelligent control operation combination unit 2 are automatically controlled by the PLC digital control system to realize intelligent control processes such as automatic liquid or gas medium pressurized bursting test / depressurization / data acquisition and processing. During the pressurized thermal cycling test, the installation, protection, and intelligent control operation of the test piece 1.23 are the same as those in the bursting test. During this period, the automatic heating operation of the small heating table with a heat-insulating cover and a high-pressure protective cover needs to be operated through the 2.23 PLC digital control system to ensure the automatic control / data acquisition and processing of test temperature rise / fall, etc.

[0060] High-precision dynamic torque cycle test unit. During the high-precision dynamic torque cycle test, the first valve under test 1.17.5 can be installed on the workstation of the quick-install static pressure test unit or the blasting and pressurized thermal cycle test unit according to the test parameters: such as no-load, pressure, temperature, opening angle or stroke limit parameter requirements. According to the characteristics of the manual devices of the first valve under test 1.17.5 such as handwheels and handles, a two-limb tooling or a single-limb tooling is selected. Through the flexible mechanism composed of the guide rails, 1.9 locking sliders, columns, support blocks, cross columns and mounting trays of the unit, the connecting tooling can be freely, accurately and reliably connected to the manual devices of the first valve under test 1.17.5, thereby reducing measurement errors. Through the PLC digital control system of the intelligent control operation combination unit 2, the operation of the motor reduction integrated machine and the data acquisition and transmission process of the high-precision torque sensor are automatically controlled to realize automatic and high-precision operation of the high-precision dynamic torque cycle test, as well as data acquisition and processing and real-time dynamic display of characteristic curves. The high-precision dynamic torque cycle test process, based on the valve type characteristics of multi-rotary valves (such as gate valves) and part-rotary valves (ball valves), is designed through the PLC digital control system to control the number of turns and angle switches and the set torque prediction switch in-position control with dual high-precision / valve matching opening and closing cycle control. It has high-precision auxiliary design with over-torque overload protection, alarm response, remaining 5% to 20% number of turns speed reduction protection, and speed reduction protection for exceeding the set torque but not reaching the alarm torque. It solves the problems of low torque test accuracy of common small-diameter valves, damage to valve components caused by over-range / overload due to inertia of driving force in the opening and closing process, and time-consuming, labor-intensive and low-precision tests such as poor closing, failure to open, and inability to run continuously.

[0061] The device described in the present invention is versatile, complete, exquisite, small and intensive with high integration, high degree of automation, intelligence, cleanliness and efficiency, high measurement accuracy, outstanding safety and reliability, and realizes the comprehensive functions of real-time data human-computer interactive display and processing, water or gas cut-off static pressure rapid installation test, pressurized thermal cycle and valve high-pressure explosion verification test, high-precision dynamic torque measurement and fault diagnosis integration and innovation, which greatly improves the detection efficiency and accuracy.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below, characterized in that: It includes a quick-installation static pressure test unit, a bursting and pressurized thermal cycle test unit, a high-precision dynamic torque cycle test unit, and an intelligent control operation combination unit. The quick-installation static pressure test unit, the bursting and pressurized thermal cycle test unit, and the high-precision dynamic torque cycle test unit form a mechanical combination unit. The mechanical combination unit (1) realizes control and interaction through pipeline and communication connections with the intelligent control operation combination unit (2); The quick-installation static pressure test unit includes a double-ear drainage tank (1.3), a first manual needle valve (1.4), a second manual needle valve (1.5), a first pressure gauge (1.6), a handwheel screw (1.28), an L-shaped mounting bracket (1.29), a bottom plate (1.30), a sealing disc (1.31), a valve under test (1.32), a pressure-bearing steel plug (1.33), a large thrust cylinder (1.34), a cylinder control unit (1.36), the first manual needle valve (1.4), the second manual needle valve (1.5), and the first pressure gauge (1.6) are installed at one end of the test bench. A double-ear drainage tank is provided under the test bench. A drainage port is provided at the lower end of one side of the double-ear drainage tank, and a drainage valve for controlling the drainage port is provided on the drainage port. The front end of the first manual needle valve is connected to the first pressure inlet (B1), and the rear end of the first manual needle valve selects a connection between the first high-pressure quick connection port (A1) and the second high-pressure quick connection port (D1). The ear at the upper end of the other side of the double-ear drainage tank is connected to one end of the second manual needle valve through a pipeline, and the other end of the second manual needle valve is connected to the first pressure gauge. The bottom plate is fixedly connected to the test bench, and two symmetric L-shaped mounting bracket mounting grooves are provided on the bottom plate. Two L-shaped mounting brackets are symmetrically installed in the corresponding L-shaped mounting bracket mounting grooves; The large thrust cylinder is installed on the left L-shaped mounting bracket; The handwheel screw is installed on the right L-shaped mounting bracket; The sealing disc is provided with an inlet, a pressure relief, and a leak detection channel. One sealing disc is installed on the right side of the large thrust cylinder, and the other sealing disc is installed on the left side of the handwheel screw; The valve under test is placed between the two sealing discs. The pressure-bearing steel plug is a flat steel plate structure with a U-shaped notch in the middle of the lower part and a lug in the upper part, and is arranged at the position where the extending shaft of the large thrust cylinder is behind one sealing disc; The cylinder control unit is connected to the large thrust cylinder through an air source hose to control the large thrust cylinder; The first high-pressure quick connection port and the second high-pressure quick connection port are respectively connected to the sealing discs at both ends of the valve under test.

2. A high-precision dynamic torque intelligent control comprehensive test system for static pressure bursting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below according to claim 1, characterized in that: Blasting and pressure - bearing thermal cycle test unit, including a third manual needle valve (1.19), a fourth manual needle valve (1.20), a second pressure gauge (1.21), a small heating table with a heat - insulating cover and a high - pressure protective cover (1.22), a test piece (1.23), a pipe - clamping and fixing tooling (1.24), connecting pipe fittings (1.25). The third manual needle valve (1.19), the fourth manual needle valve (1.20), and the second pressure gauge (1.21) are installed at the other end of the test bench. The front end of the fourth manual needle valve is connected to the second pressure inlet (B2), and the rear end of the fourth manual needle valve is selectively connected between the third high - pressure quick - connection port (A2) and the fourth high - pressure quick - connection port (D2). One end of the third manual needle valve is connected by a pipe to the ear at the upper end of the other side of the double - ear drainage tank. The second pressure gauge is connected to the rear end of the fourth manual needle valve. The small heating table with a heat - insulating cover and a high - pressure protective cover is fixed above the test bench. The test piece is placed on the small heating table with a heat - insulating cover and a high - pressure protective cover and is covered by the heat - insulating cover and the high - pressure protective cover. One end of the test piece is connected to one end of a connecting pipe fitting, and the other end of the test piece is connected to one end of another connecting pipe fitting. The connecting pipe fittings are used to connect the test piece. The pipe - clamping and fixing tooling fixes and locks the connecting pipe fittings and the test valve. The third high - pressure quick - connection port is located at the other end of one connecting pipe fitting. The fourth high - pressure quick - connection port is located at the other end of the other connecting pipe fitting.

3. A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below according to claim 2, characterized in that: High - precision dynamic torque cycle test unit, including a guide rail (1.8), a lockable slider (1.9), a column (1.10), a support block (1.11), a cross - column (1.12), a mounting plate (1.13), a motor - reducer integrated machine (1.14), a precision coupling (1.15), a high - precision torque sensor (1.16), a connecting tooling (1.17). The guide rail is installed on the test bench. The lockable slider is installed on the guide rail. The column is installed on the lockable slider. The support block is installed on the column and can move up and down along the column and be locked. The cross - column is installed on the support block. The mounting plate is installed on the cross - column and can move left and right along the cross - column and be locked. The motor - reducer integrated machine is installed on the mounting plate. The motor - reducer integrated machine is connected to the high - precision torque sensor through a precision coupling below to measure the opening and closing drive and dynamic torque of the test valve. The connecting tooling is placed below the high - precision torque sensor, and the connecting tooling connects the first test valve (1.17.5).

4. An intelligent comprehensive test system for static pressure bursting and pressurized thermal cycling high-precision dynamic torque control of valves with a nominal diameter of DN50 and below according to claim 3, characterized in that: The intelligent control operation combination unit (2) includes a water tank (2.1), a gas-liquid booster pump (2.2), a first one-way valve (2.3), a second one-way valve (2.4), a continuous metering pump (2.5), a gas cylinder group (2.6), a pressure reducing valve (2.7), a fifth manual needle valve (2.8), a sixth manual needle valve (2.10), a seventh manual needle valve (2.12), a ninth manual needle valve (2.19), a tenth manual needle valve (2.20), an accumulator (2.9), a first solenoid valve (2.11), a second solenoid valve (2.21), a first pressure sensor (2.13), a second pressure sensor (2.18), a third pressure gauge (2.14), a fourth pressure gauge (2.17), a first test piece (2.16), and a PLC digital control system (2.23); One end of the gas-liquid booster pump and one end of the continuous metering pump are connected to a water pipe, and the water pipe extends into the water tank. The gas-liquid booster pump and the continuous metering pump are connected in parallel. One end of the second one-way valve is connected to the other end of the continuous metering pump, and one end of the first one-way valve is connected to the other end of the gas-liquid booster pump; The other end of the first one-way valve is connected to the accumulator and the pipeline, and the other end of the second one-way valve is connected to the pipeline. The pipeline is connected to one end of the fifth manual needle valve, one end of the sixth manual needle valve, one end of the seventh manual needle valve, one end of the ninth manual needle valve, and one end of the tenth manual needle valve. The other end of the fifth manual needle valve is connected to the pressure reducing valve, and the pressure reducing valve is installed at the gas outlet of the gas cylinder group; The other end of the sixth manual needle valve is connected to the first solenoid valve, and the first solenoid valve is placed in the parallel manual needle valve circuit in front of the first test piece; The other end of the tenth manual needle valve is connected to the second solenoid valve, and the second solenoid valve is placed in the parallel manual needle valve circuit behind the first test piece. The first pressure sensor is connected to the third pressure gauge and placed at the rear end of the parallel manual needle valve circuit in front of the first test piece; The second pressure sensor is connected to the fourth pressure gauge and placed at the front end of the parallel manual needle valve circuit behind the first test piece; The PLC digital control system is placed in the intelligent control operation combination unit to control and collect data from the high-precision torque sensor, gas-liquid booster pump, continuous metering pump, first solenoid valve, second solenoid valve, first pressure sensor, and second pressure sensor.

5. The static pressure burst and pressurized thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves with a nominal diameter of DN50 and below according to claim 4, characterized in that: Optional graduated cylinder (L) and laser bubble leak detector (LT) are connected to the intelligent control operation combination unit through the first quick connection port (A3), the second quick connection port (B3), the third quick connection port (C3), and the fourth quick connection port (D3) for leak detection. The first quick connection port, the second quick connection port, the third quick connection port, and the fourth quick connection port are arranged at both ends of the first test piece (2.16).

6. A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below according to claim 5, characterized in that: The connection tooling includes a grooved sleeve (1.17.1), a connection disk (1.17.2), and a tooling; The grooved sleeve is connected below the high-precision torque sensor. The connection disk is installed below the grooved sleeve and connected to the grooved sleeve through a connecting shaft. A through groove is opened at the bottom of the connection disk, and the tooling is fixed in the through groove and connected to the small-diameter valve.

7. An integrated intelligent control comprehensive test system for static pressure bursting and pressurized thermal cycling high-precision dynamic torque of valves with DN50 and below, characterized in that: The tooling includes a two-leg type tooling (1.17.3) and a single-leg type tooling (1.17.4). The two-leg type tooling connects to a small-diameter valve that drives a T-shaped handle during the opening and closing cycle and high-precision dynamic torque test; the single-leg type tooling connects to a small-diameter valve that drives an L-shaped handle during the opening and closing cycle and high-precision dynamic torque test.

8. An intelligent comprehensive test system for static pressure blasting and pressurized thermal cycling high-precision dynamic torque control of valves with a nominal diameter of DN50 and below according to claim 7, characterized in that: It also includes a safety protection isolation unit. The safety protection isolation unit includes a fixed protection plate (1.7), a first movable protection plate (1.18), a second movable protection plate (1.26), a third movable protection plate (1.35), a liftable protection plate (1.27), a liftable protection plate control unit (1.37), a double-acting cylinder (1.38), and a test bench (1.39). The fixed protection plate is fixed on the test bench to isolate the high-precision dynamic torque cycle test unit from the quick-installation static pressure test unit and the burst and pressurized thermal cycle test unit; the first movable protection plate, the second movable protection plate, and the third movable protection plate are placed at the upper edge of the test bench on the periphery of the quick-installation static pressure test unit and the burst and pressurized thermal cycle test unit, forming a square with the fixed protection plate; the liftable protection plate is placed between the quick-installation static pressure test unit and the burst and pressurized thermal cycle test unit, and the double-acting cylinder is driven by the liftable protection plate control unit to lift the liftable protection plate.

9. A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycling of valves with a nominal diameter of DN50 and below according to claim 4, characterized in that: The intelligent control operation combination unit (2) also includes an eighth manual needle valve (2.15) and an eleventh manual needle valve (2.22). The pipeline also connects to the eighth manual needle valve, and one end of the eighth manual needle valve is placed in the first water tank; the tenth manual needle valve and the second solenoid valve also connect to the eleventh manual needle valve, and one end of the eleventh manual needle valve is connected to the inside of the water tank (2.1).

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