Static pressure blasting and under-pressure thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves of DN50 and below

Abstract

A static pressure blasting and under-pressure thermal cycle high-precision dynamic torque intelligent control comprehensive test system for valves of DN50 and below is characterized in that a static pressure test unit, a blasting and under-pressure thermal cycle test unit and a high-precision dynamic torque cycle test unit are rapidly installed to form a mechanical combination unit; the mechanical combination unit realizes control and interaction through pipeline and communication connection between the mechanical combination unit and the intelligent control operation combination unit. The integrated test bench has the advantages that the integrated test bench integrates the functions of a rapid installation static pressure test unit, a blasting-under-pressure thermal cycle test unit and a high-precision dynamic torque cycle test unit, an integrated multi-station structure is adopted, the equipment functions are complete, the structure is small and exquisite, the integration degree is high, the test tool cost is greatly reduced, and the test efficiency is improved. The testing and mounting problems of diversified end connection of threads, butt welding, socket welding, clamping sleeves, flanges and non-standard connection of small-caliber valves of DN50 and below are solved, and the reliability testing requirements of static pressure, blasting, hot circulation under pressure and dynamic torque of the valves of DN50 and below are met.

Description

Technical Field

[0001] The patent of this invention relates to the field of valve testing, and specifically to a high-precision dynamic torque intelligent control integrated testing system for static pressure blasting and pressurized thermal cycling for valves of DN50 and below. Background Art

[0002] At present, the detection devices for valves below DN50 on the market have single functions, high development costs for customized devices, low measurement accuracy caused by simple factory-made devices, low degree of automation, inability to accurately quantify, and very easy to cause damage or failure of the tested valves. These deficiencies and lags make it impossible to provide scientific and accurate technical feedback and improvement on product quality, which is one of the main bottlenecks affecting the development of the valve industry below DN50 and the improvement of product quality. It is also one of the main reasons why valves below DN50 used in the nuclear power and chemical industries are still mainly dependent on imports.

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

[0004] China's special equipment catalog stipulates that valves of DN50 and above are special equipment pressure piping components that meet the medium and pressure conditions, are included in the scope of supervision, and need to obtain production licenses and type tests. There is a gap in the supervision of valves below DN50, which basically relies on market or industry access, that is, factory self-inspection, customer acceptance, voluntary certification, etc. Under the current situation of fierce market price competition, this is one of the main reasons for the uneven quality of valves below DN50 in the market.

[0005] For valve products below DN50, technical performance indicators such as static pressure, burst, pressurized thermal cycle and dynamic torque test are some of the key indicators for evaluating the reliability of these valve products. In the market, there are more pressure testing machines above DN50, while there are fewer test devices for valves below DN50, with single functions and low test efficiency. For example, conventional pressure testing machines suitable for valves below DN50, the products supplied on the market generally have relatively simple functions and the development of customized equipment is still insufficient. Most companies use self-designed and simple tooling to reduce costs and improve efficiency based on the characteristics of the valve products they produce, such as cylinder top pressure + sealing disk tooling that can only test low-pressure gas media. These tooling solves the problem of low test efficiency in some areas, but there are major defects in measurement stability, measurement accuracy, measurement safety, inability to accurately quantify, narrow test range, etc., and cannot meet the market demand for comprehensive, automated, high-precision, high-reliability testing and safety requirements such as large-scale static pressure testing, burst testing, and high-precision dynamic torque cycle testing; this is another major reason for the large number of procurement of testing equipment for valves below DN50, high investment costs, as well as the low reliability of these valve products, uneven quality, limited development of domestic products, and high reliance on imports for high-end products.

[0006] For the torque test of key indicators of valve products below DN50, torque wrenches or simple torque sensors + motor drives are currently used. There are common problems such as rough test process, low precision, low adaptability to the manual drive device of the valve under test, and inability to accurately characterize dynamic process data. Especially for the simple torque sensor + motor drive torque test, the torque test accuracy is low, the inertia of the driving force during the opening and closing process can easily lead to damage to valve components caused by over-range / overload, and the test method is not tight and cannot run continuously. These problems often occur, resulting in time-consuming and labor-intensive tests, equipment failures, damage to the valve under test, and confusion and distortion of torque result data. Summary of the invention

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

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A high-precision dynamic torque intelligent control integrated test system for static pressure explosion and pressurized thermal cycle for valves of DN50 and below, comprising a quick-install static pressure test unit, an explosion and pressurized thermal cycle test unit, a high-precision dynamic torque cycle test unit and an intelligent control operation combination unit. The quick-install static pressure test unit, the explosion and pressurized thermal cycle test unit and the high-precision dynamic torque cycle test unit constitute 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.

[0009] Furthermore, a quick-install static pressure test unit includes a double-ear drainage box, a first manual needle valve, a second manual needle valve, a first pressure gauge, a screw with a handwheel, an L-shaped mounting frame, a base plate, a sealing disk, a valve to be tested, a pressure-bearing steel plug plate, a large thrust cylinder, a cylinder control unit, a first manual needle valve, a second manual needle valve and a first pressure gauge are installed on one end of the test bench, a double-ear drainage box is provided under the test bench, a drain port is provided at the lower end of one side of the double-ear drainage box, a drain port is provided on the drain port, 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, 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 box is connected to one end of the second manual needle valve through a pipe, the other end of the second manual needle valve is connected to the first pressure gauge, and the base plate is connected and fixed on the test bench. On the test bench, two symmetrical L-shaped mounting grooves are provided on the bottom plate, and the two L-shaped mounting grooves are symmetrically installed in the corresponding L-shaped mounting grooves; the large thrust cylinder is installed on the L-shaped mounting frame on the left; the screw with a handwheel is installed on the L-shaped mounting frame on the right; the sealing disk is provided with an inlet, a pressure relief, and a leak detection channel, one sealing disk is installed on the right side of the large thrust cylinder, and the other sealing disk is installed on the left side of the screw with a handwheel; the valve to be tested is placed between the two sealing disks, and the pressure-bearing steel plug plate is a flat steel plate structure with a U-shaped notch in the middle of the lower part and a lug on the upper part, and is arranged at a position where the extended shaft of the large thrust cylinder is located behind a sealing disk; 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 disks at both ends of the valve to be tested.

[0010] Furthermore, the blasting and pressurized thermal cycle 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 clamp fixing tool, a connecting pipe fitting, a third manual needle valve, a fourth manual needle valve, and a second pressure gauge are installed on 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 box is connected to one end of the third manual needle valve through a pipeline, and the second pressure gauge is connected to the third pressure gauge through a pipe. The force gauge is connected to the rear end of the fourth manual needle valve; a small heating table with a heat-insulating cover and a high-pressure protective cover is fixed on the top of the test bench, and the workpiece under test is placed on the small heating table with the heat-insulating cover and the high-pressure protective cover and covered by the heat-insulating cover and the high-pressure protective cover; one end of the workpiece under test is connected to one end of a connecting pipe fitting, and the other end of the workpiece under test is connected to one end of another connecting pipe fitting; the connecting pipe fitting is used to connect the workpiece under test; the pipe clamping fixture fixes and locks the connecting pipe fitting and the valve under test, and the third high-pressure quick connecting port is placed at the other end of a connecting pipe fitting; the fourth high-pressure quick connecting port is placed at the other end of another connecting pipe fitting.

[0011] Furthermore, a high-precision dynamic torque cycle test unit includes a guide rail, a locking slider, a column, a support block, a cross column, a mounting pallet, a motor reduction integrated machine, a precision coupling, a high-precision torque sensor, and a connecting tool. The guide rail is installed on the test bench, the locking slider is installed on the guide rail, the column is installed on the locking slider, the support block is installed on the column and can be moved up and down and locked along the column, the cross column is installed on the support block, the mounting pallet is installed on the cross column and can be moved left and right along the cross column and locked, and a motor reduction integrated machine is provided on the mounting pallet; the motor reduction integrated machine is connected to the high-precision torque sensor through a precision coupling at the bottom to measure the opening and closing drive and dynamic torque of the valve under test; the connecting tool is installed at the bottom of the high-precision torque sensor, and the connecting tool is connected to the first valve under test.

[0012] 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 quantitative 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 quantitative pump are connected to a water pipe, the water pipe extends into the water tank, the gas-liquid booster pump is connected in parallel, one end of the second one-way valve is connected to the other end of the continuous quantitative 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, and the pipeline is connected to one end of the fifth manual needle valve, one end of the sixth manual needle valve, and one end of the seventh manual needle valve. One end of the valve, one end of the ninth manual needle valve, one end of the tenth manual needle valve, and the other end of the fifth manual needle valve are connected to the pressure reducing valve, which 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 measured object; 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 measured object, 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 measured object; 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 measured object; the PLC digital control system is placed in the intelligent control operation combination unit to control and collect data for the high-precision torque sensor, the gas-liquid booster pump, the continuous quantitative pump, the first solenoid valve, the second solenoid valve, the first pressure sensor, and the second pressure sensor.

[0013] Furthermore, the optional measuring cylinder and laser bubble leak detector are connected to the intelligent control operation combination unit through the first quick connection port, the second quick connection port, the third quick connection port, and the 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.

[0014] Furthermore, the connecting tooling includes a grooved sleeve, a connecting plate, and a tooling; the grooved sleeve is connected to the bottom of the high-precision torque sensor, the connecting plate 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 connecting plate, the tooling is fixed in the through groove, and is connected to the small-diameter valve.

[0015] Furthermore, the tooling includes a two-limb tooling and a single-limb tooling. The two-limb tooling is used to connect and drive a small-diameter valve with a T-handle during opening and closing cycles and high-precision dynamic torque tests; the single-limb tooling is used to connect and drive a small-diameter valve with a ┒-handle during opening and closing cycles and high-precision dynamic torque tests.

[0016] Furthermore, it also includes a safety protection isolation unit, which includes a fixed protective plate, a first movable protective plate, a second movable protective plate, a third movable protective plate, a liftable protective plate, a liftable protective plate control unit, a double-acting cylinder and a test bench, wherein the fixed protective plate is fixed on the test bench to isolate the high-precision dynamic torque cycle test unit from the quick-install static pressure test unit and the blasting and pressurized thermal cycle test unit; the first movable protective plate, the second movable protective plate and the third movable protective plate are placed on the upper edge of the test bench outside the quick-install static pressure test unit and the blasting and pressurized thermal cycle test unit to form a square with the fixed protective plate; the liftable protective plate is placed between the quick-install static pressure test unit and the blasting and pressurized thermal cycle test unit, and the liftable protective plate is driven to rise and fall by controlling the double-acting cylinder through the liftable protective plate control unit.

[0017] Furthermore, the intelligent control operation combination unit also 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.

[0018] The beneficial effects of the present invention are: 1) The present invention integrates the functions of a quick-installation static pressure test unit, a burst-heat cycle test unit under pressure, and a high-precision dynamic torque cycle test unit into an integrated test bench, and adopts an integrated multi-station structure. The equipment has complete functions, a compact structure, and a high degree of integration, which greatly reduces the cost of test tooling, solves the test and installation problems of various end connections of small-diameter valves of DN50 and below, such as threads, butt welds, socket welds, ferrules, flanges, and non-standard connections, and meets the reliability test requirements of static pressure, burst, heat cycle under pressure, and dynamic torque of valves below DN50.

[0019] The equipment of the present invention has diversified functions, low carbon and high efficiency, and solves the common technical problem in the industry that "most of the test devices on the market are single-function test devices such as pulse test, fatigue test and pressure test for pipe fittings, and there is no report on high-precision multifunctional test equipment for hydrostatic pressure / burst test / dynamic torque cycle of valves below DN50, which cannot meet the reliability test requirements of valves below DN50 specified in ASTM F1387, GB / T 8464, JB / T 7746 and other standards"; 3) The present invention is fully functional, safe and reliable, and low in cost. A pressure-bearing steel plug plate with a U-shaped notch in the middle of the lower part and a lug on the upper part is designed in the quick-installation static pressure test unit, which compensates for and solves the disadvantages of insufficient cylinder thrust during high-pressure water testing and increased cost and occupied space caused by larger cylinders.

[0020] 4) The present invention has a high degree of automation, intelligence and convenient operation. Through the intelligent control operation combination unit of the system, the operation and test process of static pressure, blasting, pressurized thermal cycle and dynamic torque of valves below DN50 can be conveniently controlled and real-time data collected, analyzed and processed. It can also be connected to AI plug-ins to realize intelligent voice control and data recognition.

[0021] 5) The present invention has high precision, automatic flexible design, and reliable functions. Aiming at the driving difficulties of common manual devices such as handwheels, T-handles, and ┒-handles for small-diameter valves of DN50 and below during dynamic testing, a high-precision dynamic torque cycle test unit with two-limb tooling and single-limb tooling access system is designed, as well as a flexible structure of a freely liftable column and a freely horizontally movable crossbar, which meets the testing requirements of multiple stations and realizes high-precision torque dynamic detection of the tested product; Among them, the high-precision dynamic torque cycle test process is aimed at the valve type characteristics "multi-turn valves such as gate valves, partial turn valves The "characteristics of valves such as ball valves" are combined with the intelligent control operation combination unit to design "number of turns and angle switch prediction control" and "set torque prediction switch in place control" dual high-precision / valve matching opening and closing cycle control, with over-torque overload protection, alarm response, remaining 5% to 20% number of turns speed reduction protection, and high-precision auxiliary design for over-set torque under-reaching alarm torque speed reduction protection. It solves the problems of low torque test accuracy of common small-caliber 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 and labor-intensive tests with low precision such as poor closing, inability to open, and inability to run continuously.

[0022] 6) The present invention has a safe structure, is low-carbon and clean, and has excellent expandability. A safety protection isolation unit is designed to effectively isolate the quick-install static pressure test unit, the blasting and pressurized thermal cycle test unit, and the high-precision dynamic torque cycle test unit to ensure the safety of the test and personnel. A drainage box with double L ears is designed in the test bench to prevent the splashing of the pressure relief medium after the test, ensuring the safety of the test and personnel. The design reserves access ports such as laser bubble leak detectors and high-pressure gas boosting devices to meet the requirements of high-precision valve seat leakage detection and high-pressure gas boosting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycling for valves DN50 and below.

[0024] Figure 2 This is a schematic diagram of the connecting tooling structure of a two-limb tooling.

[0025] Figure 3 This is a schematic diagram of the connecting tooling structure of a single-limb tooling.

[0026] Figure 4 This is a schematic diagram of the pipe clamping fixture structure.

[0027] Figure 5 This is a schematic diagram of the pressure-bearing steel plug plate structure.

[0028] 1 is a mechanical combination unit 1.1 is the drain port, 1.2 is the drain valve, 1.3 is the double-ear drain box, 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 handwheel, 1.29 is the L-shaped mounting frame, 1.30 is the bottom plate, 1.31 is the sealing disc, 1.32 is the valve to be tested, 1.33 is the pressure-bearing steel plug plate, 1.34 is the high-thrust cylinder, 1.36 is the cylinder control unit, B1 is the first pressure inlet, C1 is the first pressure outlet, A1 is the first high-pressure quick connection port, and D1 is the second high-pressure quick connection port; 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 a small heating table with a heat-insulating cover and a high-pressure protective cover, 1.23 is the test piece, 1.24 is a pipe clamping fixture, 1.25 is a connecting pipe fitting, B2 is the second pressure inlet, C2 is the second pressure outlet, A2 is the second high-pressure quick connection port, and D2 is the second high-pressure quick connection port; 1.8 is a guide rail, 1.9 is a slider with lock, 1.10 is a column, 1.11 is a support block, 1.12 is a horizontal column, 1.13 is a mounting bracket, 1.14 is a motor reduction integrated machine, 1.15 is a precision coupling, 1.16 is a high-precision torque sensor, 1.17 is a connecting tool, 1.17.1 is a grooved sleeve, 1.17.2 is a connecting plate, 1.17.3 is a two-limb tool, 1.17.4 is a single-limb tool; 1.17.5 is the first valve to be tested; 1.7 is a fixed protective plate, 1.18 is a first movable protective plate, 1.26 is a second movable protective plate, 1.35 is a third movable protective plate, 1.27 is a liftable protective plate, 1.37 is a liftable protective plate control unit, 1.38 is a double-acting cylinder, and 1.39 is a test bench; 2 is the intelligent control operation combination unit 2.1 is a water tank, 2.2 is a gas-liquid booster pump, 2.3 is a first one-way valve, 2.4 is a second one-way valve, 2.5 is a continuous quantitative pump, 2.6 is a gas cylinder group, 2.7 is a pressure reducing valve, 2.8 is the fifth manual needle valve, 2.10 is the sixth manual needle valve, 2.12 is the seventh manual needle valve, 2.19 is the ninth manual needle valve, 2.20 is the tenth manual needle valve, 2.15 is the eighth manual needle valve, 2.22 is the eleventh manual needle valve, 2.9 is an accumulator, 2.11 is the first solenoid valve, 2.21 is the second solenoid valve, 2.13 is the first pressure sensor, 2.18 is the second pressure sensor, 2.14 is the third pressure gauge, 2.17 is the fourth pressure gauge, 2.16 is the first test piece, 2.23 is the PLC digital control system, L is the measuring cylinder, LT is the laser bubble leak detector, A3 is the first quick connection port, B3 is the second quick connection port, C3 is the third quick connection port, and D3 is the fourth quick connection port. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1 Combination Figure 1-5 A high-precision dynamic torque intelligent control comprehensive test system for static pressure explosion and pressurized thermal cycle for valves of DN50 and below, including 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 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.

[0031] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The quick-install static pressure test unit includes a double-ear drain box 1.3, a first manual needle valve 1.4, a second manual needle valve 1.5, a first pressure gauge 1.6, a screw with a handwheel 1.28, an L-shaped mounting frame 1.29, a bottom plate 1.30, a sealing disc 1.31, a valve to be tested 1.32, a pressure-bearing steel plug 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, and a first high-pressure quick connection port A 1 and the 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 on one end of the test bench, a binaural drainage box is provided under the test bench, a drainage port is provided at the lower end of one side of the binaural drainage box, a drainage valve for controlling the drainage port is provided on the drainage 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, and the rear end of the first manual needle valve 1.4 is selectively connected 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 box 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 connected and fixed on the test bench. Two symmetrical L-shaped mounting grooves are opened on the bottom plate. Two L-shaped mounting grooves are symmetrically installed in the corresponding L-shaped mounting grooves; the large thrust cylinder 1.34 is installed on the L-shaped mounting groove on the left; the handwheel screw 1.28 is installed on the L-shaped mounting groove on the right; the sealing plate 1.31 is provided with an inlet, a pressure relief, and a leak detection channel, and a sealing plate 1 .31 is installed on the right side of the large thrust cylinder, and another sealing disk 1.31 is installed on the left side with a handwheel screw; the valve 1.32 to be tested is placed between the two sealing disks 1.31, and the pressure-bearing steel plug plate 1.33 is a flat steel plate structure with a U-shaped notch in the middle of the lower part and a lug on the upper part, which is arranged at a position where the extended shaft of the large thrust cylinder is located behind a sealing disk 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 disks at both ends of the valve to be tested.

[0032] A high-precision dynamic torque intelligent control integrated test system for static pressure explosion and pressurized thermal cycle for valves of DN50 and below, an explosion and pressurized thermal cycle test unit, comprising 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 clamp fixing tool 1.24, a connecting pipe fitting 1.25, a second pressure inlet B2, a second pressure outlet 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 on 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 pressure inlet B2, and the rear end of the fourth manual needle valve 1.20 is at the third high-pressure quick connection port A2 and the fourth high-pressure quick-connect port D2, the ear at the upper end of the other side of the double-ear drainage box is connected to one end of the third manual needle valve 1.19 through a pipe, and the second pressure gauge 1.21 is connected to the rear end of the fourth manual needle valve 1.20; a small heating table 1.22 with a heat-insulating cover and a high-pressure protective cover is fixed on the top of 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 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 fitting 1.25 is used to connect the test piece; the pipe clamping fixture 1.24 fixes and locks the connecting pipe fitting and the valve under test, and the third high-pressure quick-connect port A2 is placed at the other end of a connecting pipe fitting 1.25; the fourth high-pressure quick-connect port D2 is placed at the other end of another connecting pipe fitting 1.25.

[0033] The second pressure inlet B2 is connected to the third high-pressure quick connection port A2, and the second pressure outlet C2 is connected to the fourth high-pressure quick connection port D2. A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, a high-precision dynamic torque cycle test unit, including a guide rail 1.8, a locking slider 1.9, a column 1.10, a support block 1.11, a cross column 1.12, a mounting bracket 1.13, a motor reduction integrated machine 1.14, a precision coupling 1.15, a high-precision torque sensor 1.16, and a connecting tool 1.17. The guide rail 1.8 is installed on the test bench, the locking slider 1.9 is installed on the guide rail 1.8, and the column 1.10 is installed on the locking On the slider, the support block 1.11 is installed on the column, and can be moved up and down and locked along the column. The cross column 1.12 is installed on the support block. The mounting bracket 1.13 is installed on the cross column, and can be moved left and right and locked along the cross column. The mounting bracket 1.13 is provided with a motor reduction integrated machine 1.14; the motor reduction integrated machine 1.14 is connected to a high-precision torque sensor through a precision coupling below 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.

[0034] A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves 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 one-way valve 2.3, a second one-way valve 2.4, a continuous quantitative 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, and a second pressure sensor 2. .18, the third pressure gauge 2.14, the fourth pressure gauge 2.17, the first test piece 2.16, the PLC digital control system 2.23; one end of the gas-liquid booster pump 2.2 and one end of the continuous quantitative pump 2.5 are connected to the water pipe, the water pipe extends into the water tank, the gas-liquid booster pump 2.2 and the continuous quantitative pump 2.5 are connected in parallel, one end of the second one-way valve 2.4 is connected to the other end of the continuous quantitative pump, and one end of the first one-way valve 2.3 is connected to the other end of the gas-liquid booster pump; the other end of the first one-way valve 2.3 is connected to the accumulator and the pipeline, the other end of the second one-way valve 2.4 is connected to the pipeline, the pipeline, the pipeline is connected to one end of the fifth manual needle valve 2.8, the sixth One end of the 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, one end of the tenth manual needle valve 2.20, and the other end of the fifth manual needle valve 2.8 are connected to the pressure reducing valve 2.7, and the pressure reducing valve 2.7 is installed at the gas 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 manual needle valve parallel circuit before the first measured object 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 manual needle valve parallel circuit after the first measured object 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 manual needle valve parallel circuit in front of the first measured object 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 manual needle valve parallel circuit behind the first measured object 2.16; the PLC digital control system 2.23 is placed in the intelligent control operation combination unit, and the PLC digital control system is placed in the intelligent control operation combination unit to control and collect data for the high-precision torque sensor, the gas-liquid booster pump, the continuous quantitative pump, the first solenoid valve, the second solenoid valve, the first pressure sensor, and the second pressure sensor.

[0035] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycling for valves of DN50 and below. The optional measuring cylinder L and laser bubble leak detector LT are connected to an intelligent control operation combination unit through a first quick connection port A3, a second quick connection port B3, a third quick connection port C3, and a fourth quick connection port D3 for leak detection according to the accuracy requirements of leakage measurement of a 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.

[0036] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The connecting tool 1.17 includes a grooved sleeve 1.17.1, a connecting plate 1.17.2, and a tool. The grooved sleeve 1.17.1 is connected to the bottom of the high-precision torque sensor, and the connecting plate 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 plate, and the tool is fixed in the through groove to be connected to the small-diameter valve.

[0037] A comprehensive test system for static pressure blasting and pressurized thermal cycle high-precision dynamic torque intelligent control for valves of DN50 and below. The tooling includes a two-limb tooling 1.17.3 and a single-limb tooling 1.17.4. The two-limb tooling is used to connect and drive small-diameter valves with T-type handles during opening and closing cycles and high-precision dynamic torque tests; the single-limb tooling is used to connect and drive small-diameter valves with ┒-type handles during opening and closing cycles and high-precision dynamic torque tests.

[0038] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, also includes a safety protection isolation unit, the safety protection isolation unit includes a fixed protective plate 1.7, a first movable protective plate 1.18, a second movable protective plate 1.26, a third movable protective plate 1.35, a liftable protective plate 1.27, a liftable protective plate control unit 1.37, a double-acting cylinder 1.38 and a test bench 1.39, the fixed protective plate 1.7 is fixed on the test bench to isolate the high-precision dynamic torque cycle test unit and Quick installation static pressure test unit, blasting and pressurized thermal cycle test unit; the first movable protective plate 1.18, the second movable protective plate 1.26, and the third movable protective plate 1.35 are placed on the upper edge of the test bench outside the quick installation static pressure test unit and the blasting and pressurized thermal cycle test unit to form a square with the fixed protective plate 1.7; the liftable protective plate 1.27 is placed between the quick installation static pressure test unit and the blasting and pressurized thermal cycle test unit, and the liftable protective plate 1.27 is driven to rise and fall by a double-acting cylinder controlled by a liftable protective plate control unit.

[0039] A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. 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 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 water tank 2.1.

[0040] A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The double-ear drainage box is a double L-ear drainage box. A high-precision dynamic torque intelligent control integrated testing system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The quick installation static pressure testing unit is used for the quick installation and testing of the pressure resistance and sealing of small-diameter plumbing valves or instrument valves of DN50 and below with threaded ends, flange ends, welding ends, ferrule connections and existing diversified end structures.

[0041] The first manual needle valve and the second manual needle valve are used to control the pressure inlet, pressure maintenance, discharge, sealing and strength test of the valve 1.32 under test respectively; the double-ear drain box is a double L-ear drain box, which is used for water or gas after the static pressure test. Its double L-ear structure can discharge the gas from the ears and avoid the splash of water and gas. A drain port and a drain valve are arranged on the lower side. When the liquid level in the water tank is high, some 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 pressure inlet pipeline to monitor the test pressure of the valve 1.32 under test; the bottom plate provides mechanical positioning and support for the quick installation of the static pressure test unit; the L-shaped mounting frame is used to fix the connection and installation of the handwheel screw and the large thrust cylinder; the large thrust cylinder root The extension and retraction and thrust are automatically adjusted according to the structural length of the valve under test and the test pressure; the handwheel screw is manually adjusted and tightened according to the structural length of the valve under test; the sealing disk is provided with an inlet, a pressure relief and a leak detection channel, which is used to provide sealing protection for the valve under test and provide channels for pressure inlet, pressure relief and leak detection; the pressure-bearing steel plug plate can make up for and solve the problems of insufficient thrust of the large-thrust cylinder during high-pressure water testing and increased cost and space occupation caused by larger cylinders; the cylinder control unit realizes precise control of the thrust and extension and retraction 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 disks at both ends of the valve under test, which are used for the test medium to enter or discharge and provide a convenient channel.

[0042] A high-precision dynamic torque intelligent control integrated test system for static pressure explosion and pressurized thermal cycle for valves of DN50 and below, wherein the explosion and pressurized thermal cycle test unit is used for high-pressure explosion test and high-temperature pressurized thermal cycle test 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 pressure inlet, pressure maintenance, discharge, sealing, strength and explosion test of the tested piece; the second pressure gauge is placed at the rear end of the fourth manual needle valve 1.20 on the pressure inlet pipeline to monitor the test pressure of the tested piece; when testing on a small heating table with a thermal insulation cover and a high-pressure protective cover, the side piece is placed above the small heating table, in the thermal insulation cover and the high-pressure protective cover, to provide an external heat source, safety protection and thermal insulation protection for the thermal cycle test of the tested piece; the pipe clamping fixture prevents the tested valve and the connecting pipe fittings from loosening during the test and affecting 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, so as to facilitate connection with the connecting pipe fittings through high-pressure temperature-resistant hoses.

[0043] A high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The high-precision dynamic torque cycle test unit is used for the opening and closing cycles and high-precision dynamic torque testing of handwheels, intermediate fulcrum handles, and cantilever fulcrum handles of threaded and ferrule-connected instrument valves. In view of the valve type characteristics, multi-rotary valves and partial-rotary valves are combined with intelligent control operation combination units to design double high-precision high / valve matching opening and closing cycle programming of number of turns or angle switch predictive control and set torque predictive switch in-position 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 alarm torque speed reduction protection for exceeding the set 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, inability to open, and inability to continuously run tests.

[0044] The guide rail is used to control the free linear movement of the column; the locking slider is used to control the movement and position locking of the column; the support block can move up and down and lock along the column; the mounting bracket can move left and right and lock along the horizontal column, and a motor reducer is provided on it; the motor reducer is connected to a high-precision torque sensor through a precision coupling below to achieve precise measurement of the opening and closing drive and dynamic torque of the first measured valve; the connector is installed below the high-precision torque sensor to connect the first measured valve; the grooved sleeve is connected below the high-precision torque sensor and can be used for lifting The opening and closing cycle test of lift stem and non-lift stem valves provides rising displacement space and positioning for the opening and closing cycle process of lift stem valves to avoid misalignment; the connecting plate is connected to the grooved sleeve through the connecting shaft, and the bottom of the plate is opened with a through groove for fixing the two-limb tooling or the single-limb tooling; the two-limb tooling is fixed in the through groove at the bottom of the connecting plate, and is used to connect the small-diameter valve driving the T-handle during the opening and closing cycle and high-precision dynamic torque test; the single-limb tooling is fixed in the through groove at the bottom of the connecting plate, and is used to connect the small-diameter valve driving the ┒-type handle during the opening and closing cycle and high-precision dynamic torque test.

[0045] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The intelligent control operation combination unit and the test mechanical combination unit are connected through high-voltage quick-connect connectors, electrical communication lines, etc. The three functional units in the test mechanical combination unit are dynamically operated, monitored, and feature data are displayed and processed in real time through the valve, electrical button, and PLC digital control interface in the intelligent control operation combination unit. 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 quantitative pump, the continuous quantitative pump is used to inject water into the first tested object and the pipeline at low pressure, and the gas-liquid booster pump is used to boost the water pressure after the first tested object is injected with water at low pressure. The two are used in parallel, which can greatly improve the pressurization speed and detection time efficiency; the first check valve and the second check valve are placed behind the continuous quantitative pump and the gas-liquid booster pump respectively to prevent the medium from backflowing; the gas cylinder group, the pressure reducing valve, and the gas booster GB are connected in sequence for Provide gas test medium and boost pressure for the valve and pipeline under test; 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 tested object to control the on and off of the circulating medium in the test pipeline; the accumulator is used for stabilizing the pressure of the test pipeline; the solenoid valve realizes the boost and pressure relief of the first tested object , leak detection and other automatic and manual interchangeable dual functions and safety protection to improve 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 before and after the valve under test; the PLC digital control system is placed in the intelligent control operation combination unit, and the solenoid valve, the first pressure sensor, the second pressure sensor, the gas-liquid booster pump, the continuous quantitative pump, the gas booster GB (optional), the motor reducer, and the high-precision torque sensor in the intelligent control operation combination unit are controlled and data collected through electrical communication lines, etc., to realize the intelligent control function of the entire test process; the L measuring cylinder or the laser LT 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 leakage measurement of the valve under test.

[0046] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The safety protection isolation unit can achieve safe isolation of independent tests of three functional units and the safety of testers; the fixed protective plate effectively isolates the high-precision dynamic torque cycle test unit from the other two units; the liftable protective plate is controlled by the liftable protective plate control unit to control the double-acting cylinder to extend the valve when testing and lower it when installing or removing it, which is convenient for the installation of the valve and ensures the safety of personnel during the test.

[0047] A high-precision dynamic torque intelligent control integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below. The static pressure test unit can be quickly installed. When the static pressure test is performed with water or gas as the medium, the valve to be tested is installed between the sealing disk at the right end of the extended shaft of the large thrust cylinder and the left end of the handwheel screw. The cylinder control unit and the handwheel screw are operated to pre-tighten the two ends of the valve to be tested to ensure that there is no leakage in the connection 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 and the continuous quantitative pump or gas booster GB, the first solenoid valve 2.11, the second solenoid valve 2.21, the first pressure sensor 2.13, and the second pressure sensor 2.18 in the intelligent control operation combination unit 2 are automatically controlled through the PLC digital control system to realize intelligent control processes such as automatic liquid or gas medium pressurization / pressure relief / data acquisition and processing. When the pre-tightening force at both ends of the tested valve 1.32 required for the test pressure is greater than the range of the large thrust cylinder, a pressure-bearing steel plug plate is used to the rear end of the sealing disk on the extended shaft of the large thrust cylinder, and the handwheel screw is operated to lock the other end of the tested valve 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 overall increase in equipment size and cost caused by the larger specification cylinder.

[0048] Explosion-pressure thermal cycle test unit, during the explosion test, the test piece 1.23 is connected and tightened with the connecting pipe fittings, placed on a small heating table with a heat-insulating cover and a high-pressure protective cover, and fixed on the fixture with a clamp pipe, and 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, and the gas-liquid booster pump and the continuous quantitative pump or gas booster GB, the first solenoid valve 2.11, the second solenoid valve 2.21, the first pressure sensor 2.13, and the second pressure sensor 2.18 in the intelligent control operation combination unit 2 are automatically controlled by the PLC digital control system to realize the automatic liquid or gas medium pressurized explosion test / pressure relief / data acquisition and processing and other intelligent control processes. During the pressure thermal cycle test, the installation, protection, and intelligent control operation of the test piece 1.23 are equivalent to the explosion test. During the 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 by the 2.23 PLC digital control system to ensure the automatic control / data acquisition and processing of the test heating / cooling, etc.

[0049] 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.

[0050] 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.

[0051] 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 integrated test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized by: The invention comprises a quick-install static pressure test unit, a blasting and pressurized thermal cycle test unit, a high-precision dynamic torque cycle test unit and an intelligent control operation combination unit. The quick-install static pressure test unit, the blasting 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 with the intelligent control operation combination unit (2) through pipelines and communication connections.

2. According to claim 1, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized in that: The quick-install static pressure test unit includes a double-ear drain box (1.3), a first manual needle valve (1.4), a second manual needle valve (1.5), a first pressure gauge (1.6), a screw with a hand wheel (1.28), an L-shaped mounting frame (1.29), a base plate (1.30), a sealing disc (1.31), a valve to be tested (1.32), a pressure-bearing steel plug plate (1.33), a large thrust cylinder (1.34), a cylinder control unit (1.36), a first manual needle valve (1.4), a second manual needle valve (1.5) and a first pressure gauge (1.6) which are installed on one end of the test bench, and a double-ear drain box is provided below the test bench. A water tank, a drain port is provided at the lower end of one side of the double-ear drain box, a drain valve for controlling the drain port is provided on the drain port, a front end of a first manual needle valve is connected to a first pressure inlet (B1), a rear end of the first manual needle valve is selectively connected between a first high-pressure quick connection port (A1) and a second high-pressure quick connection port (D1), an ear at the upper end of the other side of the double-ear drain box 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 a first pressure gauge, a bottom plate is connected and fixed on a test bench, two symmetrical L-shaped mounting grooves are provided on the bottom plate, and the two L-shaped mounting grooves are symmetrically installed in the corresponding L-shaped mounting grooves; The large thrust cylinder is installed on the L-shaped mounting frame on the left; the screw with a handwheel is installed on the L-shaped mounting frame on the right; the sealing disk is provided with an inlet, a pressure relief and a leak detection channel, one sealing disk is installed on the right side of the large thrust cylinder, and the other sealing disk is installed on the left side of the screw with a handwheel; the valve to be tested is placed between the two sealing disks, and the pressure-bearing steel plug plate is a flat steel plate structure with a U-shaped notch in the middle of the lower part and a lug on the upper part, which is arranged at a position where the extended shaft of the large thrust cylinder is located behind a sealing disk; 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 disks at both ends of the valve to be tested.

3. According to claim 2, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized in that: The explosion and pressurized thermal cycle test unit comprises 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 fixture (1.24), a connecting pipe (1.25), a third manual needle valve (1.19), a fourth manual needle valve (1.20), and a second pressure gauge (1.21) installed on the other end of the test bench, a front end of the fourth manual needle valve is connected to the second pressure inlet (B2), and a 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). Then, the ear at the upper end of the other side of the double-ear drainage box is connected to one end of the third manual needle valve through a pipeline, and the second pressure gauge is connected to the rear end of the fourth manual needle valve; a small heating table with a heat-insulating cover and a high-pressure protective cover is fixed on the top of the test bench, and the test piece is placed on the small heating table with the heat-insulating cover and the high-pressure protective cover and 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 fitting is used to connect the test piece; the pipe clamp fixing tool fixes and locks the connecting pipe fitting and the valve under test, and the third high-pressure quick connecting port is placed at the other end of a connecting pipe fitting; the fourth high-pressure quick connecting port is placed at the other end of another connecting pipe fitting.

4. According to claim 3, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized in that: The high-precision dynamic torque cycle test unit includes a guide rail (1.8), a locking slider (1.9), a column (1.10), a support block (1.11), a cross column (1.12), a mounting plate (1.13), a motor reduction integrated machine (1.14), a precision coupling (1.15), a high-precision torque sensor (1.16), and a connecting tool (1.17). The guide rail is installed on the test bench, the locking slider is installed on the guide rail, the column is installed on the locking slider, the support block is installed on the column and can be moved up and down and locked along the column, the cross column is installed on the support block, the mounting plate is installed on the cross column and can be moved left and right along the cross column and locked, and a motor reduction integrated machine is arranged on the mounting plate; the motor reduction 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 valve under test; the connecting tool is installed below the high-precision torque sensor, and the connecting tool is connected to the first valve under test (1.17.5).

5. According to claim 4, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, 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 quantitative 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), and 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), a PLC digital control system (2.23); one end of the gas-liquid booster pump and one end of the continuous quantitative pump are connected to a water pipe, the water pipe extends into the water tank, the gas-liquid booster pump and the continuous quantitative pump are connected in parallel, one end of the second one-way valve is connected to the other end of the continuous quantitative pump, and one end of the first one-way valve is connected to the other end of the gas-liquid booster pump; the first one-way valve The other end of the check valve is connected to the accumulator and the pipeline, the other end of the second check valve is connected to the pipeline, 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 measured object; 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 measured object, 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 measured object; 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 measured object; the PLC digital control system is placed in the intelligent control operation combination unit to control and collect data for the high-precision torque sensor, the gas-liquid booster pump, the continuous quantitative pump, the first solenoid valve, the second solenoid valve, the first pressure sensor, and the second pressure sensor.

6. According to claim 5, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized in that: An optional measuring cylinder (L) and a laser bubble leak detector (LT) are connected to the intelligent control operation combination unit through a first quick connection port (A3), a second quick connection port (B3), a third quick connection port (C3), and a 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).

7. According to claim 6, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized in that: The connecting tooling includes a grooved sleeve (1.17.1), a connecting plate (1.17.2), and a tooling; the grooved sleeve is connected to the bottom of the high-precision torque sensor, the connecting plate 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 connecting plate, and the tooling is fixed in the through groove and connected to the small-diameter valve.

8. According to claim 7, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized in that: The tooling includes two-limb tooling (1.17.3) and single-limb tooling (1.17.4). The two-limb tooling is used to connect and drive small-diameter valves with T-handles during opening and closing cycles and high-precision dynamic torque tests; the single-limb tooling is used to connect and drive small-diameter valves with ┒-handles during opening and closing cycles and high-precision dynamic torque tests.

9. According to claim 8, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, characterized in that: The invention also includes a safety protection isolation unit, which 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-install static pressure test unit and the blasting and pressurized thermal cycle test unit; the first movable protection plate, the second movable protection plate and the third movable protection plate are arranged on the upper edge of the test bench outside the quick-install static pressure test unit and the blasting and pressurized thermal cycle test unit to form a square with the fixed protection plate; the liftable protection plate is arranged between the quick-install static pressure test unit and the blasting and pressurized thermal cycle test unit, and the liftable protection plate is driven to rise and fall by controlling the double-acting cylinder through the liftable protection plate control unit.

10. According to claim 5, a high-precision dynamic torque intelligent control comprehensive test system for static pressure blasting and pressurized thermal cycle for valves of DN50 and below, 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 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 (2.1).

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