131 results about "Hydraulic test" patented technology

The invention relates to the technical field of hydraulic test of nickel alloy pipes, and discloses a hydraulic test system for a thin-wall nickel alloy pipe. According to the system, in the axial loading state of the thin-wall nickel alloy pipe, a closed water pressure cavity is established through an annular sealing clamp, and then strain distribution data on the surface of the pipe body is collected through a distributed optical fiber sensor array. And constructing a three-dimensional stress field reconstruction model based on the acquired strain distribution data, calculating an equivalent plastic deformation threshold value of the pipe body under different water pressure gradients, adjusting a water pressure loading curve slope parameter according to the equivalent plastic deformation threshold value, and generating a dynamic water pressure loading instruction. And the high-frequency pressure pulse generator executes the instruction, synchronously triggers the X-ray diffractometer to collect lattice distortion data of the tube body, inputs the data into the material microscopic damage evolution model, and outputs a microscopic defect spatial distribution map. And finally, material constitutive parameters of the three-dimensional stress field reconstruction model are corrected based on the atlas, closed-loop feedback control is formed, and multi-dimensional data acquisition and accurate management and control of the thin-wall nickel alloy pipe hydrostatic test are achieved.

The invention discloses a system and method for testing flow, displacement and hydraulic power of a main valve element. The system comprises two displacement sensors, a tested balance valve and a hydraulic testing assembly. A main valve core and a pilot valve core of the tested balance valve are coaxially and oppositely arranged; the two displacement sensors are coaxially fixed with the main valve core and the control piston respectively; the hydraulic test assembly detects the pressure of an oil return port A, a load oil port B, a feedback spring cavity pressure measuring port Pc and a pilot oil inlet X through pressure sensors; the load pressure, the pilot pressure and the oil return back pressure are controlled through a main load oil way, a pilot control oil way and an oil return back pressure oil way respectively, and meanwhile the flow of the oil return is measured through a flow meter. According to the invention, the flow, displacement and hydraulic force of the main valve core under different working conditions can be synchronously and dynamically measured.

The invention belongs to the technical field of hydraulic test and intelligent control, and particularly discloses a hydraulic component test system integrating data acquisition and automatic data analysis functions, which comprises a physical hardware test platform, a test control software platform and a digital twinborn model of a tested component, and realizes real-time interaction through an OPC UA protocol. Model parameters are corrected on line by means of measured data, and steady state, transient state and disturbance working condition tests are automatically executed based on a working condition library; and dynamically optimizing a test sequence in a test process, skipping a redundant working condition or encrypting a critical region, and synchronously generating a structured performance report. The accuracy and consistency of test results are improved, working condition simulation signals are automatically generated, performance data are collected in real time, a comprehensive performance report is generated, manual operation is reduced, the test process optimization unit can skip redundant working conditions and refine failure boundary positioning, and the test time and cost are effectively saved.

The invention relates to the technical field of hydraulic control one-way valve testing, and discloses a hydraulic control one-way valve testing method which is used for solving the problem that the real performance of a hydraulic control one-way valve under actual complex working conditions is difficult to comprehensively reflect due to the fact that an existing testing method is single in working condition, insufficient in data acquisition dimension and lack of dynamic modeling capacity. A programmable working condition loading module is introduced, a hydraulic test environment with dynamic characteristics is constructed according to a pressure and flow change curve in practical application, and high-precision and multi-dimensional synchronous acquisition of the whole opening and closing process of the hydraulic control one-way valve is realized by combining a high-frequency displacement sensor, a micro-flow sensor and a vibration sensing unit; according to the scheme, the defect that a traditional testing method is difficult to restore the real dynamic working condition is effectively overcome, the authenticity of valve performance testing and the detail integrity of response data are remarkably improved, and powerful support is provided for accurately evaluating the dynamic behavior of the hydraulic control one-way valve under the complex working condition.

The invention discloses a modularized hydraulic system testing system and method, and relates to the technical field of hydraulic testing, and the method comprises the following steps: S1, collecting outlet pulsating pressure signals of a high-pressure plunger pump and a low-pressure vane pump by adopting a nanosecond-level synchronous time mark system, generating a phase residual error map, and calculating a phase residual error map of the outlet pulsating pressure signals of the high-pressure plunger pump and the low-pressure vane pump; the hidden resonance risk is preliminarily judged through frequency drift and amplitude gradient calculation; and S2, on the basis of the synchronous acquisition base line, carrying out cross spectrum coherence degree calculation and phase difference time sequence analysis on the pulsating pressure sequence, identifying a frequency dislocation anchor point, generating a pump source pulsating interference fingerprint, and determining a time window of recessive resonance. According to the method, real-time identification, dynamic intervention and closed-loop control of recessive resonance in the hydraulic system are realized through nanosecond-level synchronous acquisition, phase conjugate inversion and frequency dislocation traction strategies, energy coupling caused by frequency dislocation is effectively avoided, the operation stability and safety of the system are improved, and the service life of equipment is prolonged.

The invention relates to the technical field of nickel alloy pipe water pressure detection, and discloses a thin-wall nickel alloy pipe inner wall water pressure test detection system and method. The method comprises the steps that a closed water pressure environment is established in a pipe, a preset pressure gradient is applied, and pipe wall deformation response data are collected through a distributed sensing array; and generating a composite feature matrix containing axial strain, circumferential stress and radial displacement features through multi-dimensional feature extraction, inputting the composite feature matrix into a material performance degradation evaluation model, and simulating microstructure change to output a potential defect distribution map. Dynamically adjusting the water pressure gradient and the pressure maintaining time according to the map, executing a secondary water pressure test, and capturing a microscopic deformation sequence image through high-frequency imaging; comparing the image with a model prediction result identification deviation value, and iteratively updating a model parameter to optimize a detection threshold value; the test is completed by optimizing the threshold value, qualified pipe section marks and defective pipe section positioning coordinates are output, and the comprehensiveness and accuracy of thin-wall nickel alloy pipe inner wall defect detection are improved.

The invention relates to the technical field of hydropower station pressure steel pipe detection, in particular to a hydropower station steel branch pipe differential graded loading and unloading hydrostatic test method, system and equipment and a storage medium. The hydraulic test process is scientifically divided into a low-pressure stage, a medium-pressure stage and a high-pressure stage, differentiated boosting amplitude and speed control strategies are adopted in the different stages, the technical limitation of a traditional uniform graded boosting method is broken through, and an innovative control mode of low-pressure fast rising and high-pressure slow rising is achieved. The large boosting amplitude and the high boosting speed are adopted in the low-pressure stage, the bearing allowance of the steel branch pipe in the elastic deformation stage is fully utilized, and the test efficiency is remarkably improved; and in the high-pressure stage, the small pressure increasing amplitude and the slow pressure increasing speed are adopted, the sensitive characteristic when the steel is close to the yield strength is effectively adapted, and the local stress concentration and plastic deformation risks are avoided.

The invention discloses a digital twinborn body and a digital twinborn method for a hydraulic test system of a turbine pump of a liquid rocket engine, and solves the technical problem of high production and test resource consumption caused by research and development of engine products. The basic architecture of the digital twinning body comprises a digital twinning engine, a physical entity and a digital virtual body, and dynamic unification of digital virtual body prediction performance and object actual measurement performance is realized through virtual-real interaction and model training and optimization; finally, the display effect that a digital virtual body completely replaces a liquid rocket engine turbine pump hydraulic test system entity can be achieved, and the contradiction between increasing turbine pump hydraulic test tasks and limited physical test resources is greatly relieved.

The invention provides a medium isolation type pressure conversion device. The medium isolation type pressure conversion device comprises a first sealing flange and a second sealing flange which are oppositely arranged; two ends of the limiting rod are fixedly connected with axial end surfaces of the two sealing flanges; the metal isolation flange is arranged between the two sealing flanges and is in sliding connection with the limiting rod; the first corrugated pipe mechanism is connected with the first sealing flange and the isolation flange to form a first medium space; the second corrugated pipe mechanism is connected with the isolation flange and the second sealing flange to form a second medium space; a pressure receiving end for transmitting a first medium is arranged outside the first sealing flange; the outer side of the second sealing flange is provided with a liquid supplementing port for supplementing the second medium, and the pressure output end outputs pressure to the to-be-tested piece. Pressure source equipment drives the first corrugated pipe to axially extend to push the isolation flange to move, the limiting rod restrains the total length to force the second corrugated pipe to be shortened, static sealing isolation type conversion of two pressure media is achieved, and the problem that in a hydraulic test, the pressure media of the pressure source equipment are not compatible with the pressure media of a to-be-tested piece is solved.

The invention provides a pump valve shaft seal water hydraulic pressure test detection device which comprises a box body, a partition plate is fixed in the box body, an opening is formed in the partition plate, a movable plate is movably installed in the opening, a displacement mechanism and a positioning column are fixed to the movable plate, a positioning pipe is movably installed at one end of the positioning column, and the other end of the positioning pipe is provided with a clamping groove. The positioning pipe and the displacement mechanism are both fixed to the side of the box body, a pushing mechanism is fixedly installed on the side of the box body, fixing assemblies are installed on the pushing mechanism, a valve body is movably installed between the fixing assemblies, a cavity is formed in the box body, and the valve body is movably installed in the cavity. During use, before the pump body is installed, the ring seat drives the fixed pipe to move, the fixed pipe provides a required space for installation of the valve body after moving, the ring seat and the fixed pipe enter one end of the valve body in the later period, the valve body is limited and supported through the fixed pipe, and the movable seat moves in the later period to extrude and fix the valve body between the fixed seats; and air enters the fixed pipe at the later stage, and the elastic seat deforms to be in contact with the valve body for sealing during air intake.

1. The name of the design product: hydraulic comprehensive test bench. 2. The use of the design product: the design product is used for the hydraulic circuit lapping of pump body and valve body and hydraulic test. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view.

The invention relates to the technical field of hydraulic sealing, in particular to an O-shaped ring service life prediction method suitable for an extremely low temperature environment, and the method comprises the steps: carrying out the uniaxial tensile test of an O-shaped ring material in the extremely low temperature environment, and obtaining a stress-strain curve; establishing an O-shaped ring sealing structure model, and simulating and analyzing the mechanical properties of the O-shaped ring at extremely low temperature to obtain the relationship between the maximum contact stress and the compression ratio of the sealing surface of the O-shaped ring; and a dynamic seal friction wear hydraulic test bed is built, and the relation between the quality of the O-shaped ring and time is obtained. And based on a maximum contact stress criterion, coupling simulation and friction wear test results, and obtaining a life prediction result of the O-shaped ring. The method comprehensively considers the influence of temperature, pressure and medium on the O-shaped ring in the extremely low temperature environment, effectively improves the problem that the existing life prediction method cannot accurately reflect the failure mode of the O-shaped ring material under the extremely low temperature condition, and improves the accuracy of life prediction.

The application discloses a kind of main valve core flow, displacement, hydraulic force test system and test method, comprising: two displacement sensors, the balanced valve to be measured, hydraulic test component;The main valve core of the balanced valve to be measured and the pilot valve core are coaxially arranged oppositely;Two displacement sensors are respectively fixed with main valve core, control piston coaxially;Hydraulic test component detects the pressure of return oil outlet A, load oil port B, feedback spring cavity pressure measuring port Pc, pilot oil inlet X by each pressure sensor;And by main load, pilot control, three oil circuits of return oil back pressure, load pressure, pilot pressure and return oil back pressure are controlled respectively, while return oil flow is measured by flowmeter simultaneously.The application can synchronously dynamically measure the flow, displacement and hydraulic force of main valve core under different working conditions.

The invention discloses a rotary joint hydraulic test system and a control method, and the control method comprises the steps: connecting a first hydraulic joint and a second hydraulic joint on a tested piece through a hydraulic test system, and supplying high hydraulic pressure and low hydraulic pressure to the first hydraulic joint and the second hydraulic joint respectively; then the first hydraulic connector and the second hydraulic connector are driven to rotate to one end value in a rated angle range at a low speed through a hydraulic driving system, the pressure is relieved to zero after the hydraulic values are maintained, and then the supplied hydraulic values of the first hydraulic connector and the second hydraulic connector are alternated; the first hydraulic connector and the second hydraulic connector are driven to rotate to the other end value of the rated angle range, a complete hydraulic test cycle is formed, durability tests of the first hydraulic connector and the second hydraulic connector are achieved through multiple cycles, optimization of sealing type selection of the rotating connector is facilitated, and reliability of the rotating connector is improved.

The utility model relates to a hydraulic test tool which comprises an adapter base, an inlet connector, an expansion assembly, an outlet assembly, a pressure sensor and a pressure relief assembly, a hydraulic oil cavity is formed in the adapter base, the two ends of the hydraulic oil cavity penetrate through the adapter base so that two adapter ports can be formed in the adapter base, and an outlet connector is formed in the adapter base; the outlet interface is communicated with the hydraulic oil cavity; the inlet joint is arranged on one of the switching ports; the expansion assembly comprises a screw plug and an inlet connector, and the screw plug and the inlet connector are selectively connected to the other switching port in a screwed mode. The outlet assembly comprises an outlet connector, and the outlet connector is installed on the outlet connector. The pressure sensor is installed on the adapter base and used for measuring the pressure in the hydraulic oil cavity. The pressure relief assembly is installed on the adapter base and communicated with the hydraulic oil cavity. According to the invention, the problem that a single oil inlet does not have the capability of increasing the pressure increasing speed due to the fact that the pressure increasing speed of a single oil inlet mode is low and the working efficiency is influenced in the related technology can be solved.

1. Name of the product in this design: Hydraulic test bench computer control cabinet. 2. Purpose of this design: For precise, automated, and safe control of the testing process on a hydraulic testing bench. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The utility model discloses an assembly type hydraulic characteristic test bench, which comprises an experiment box, an experiment pedestal and an electric lifting mechanism, the inner top of the experiment pedestal is provided with a plurality of groups of placing clamping grooves, the inner bottoms of the plurality of groups of placing clamping grooves are in sliding clamping connection with support top plates, the bottom ends of the support top plates are symmetrically connected with extrusion push rods, and the extrusion push rods are in sliding clamping connection with the support top plates. The outer side of the extrusion push rod is sleeved with a spring, the bottom extending end of the extrusion push rod is connected with a sensing sliding block, a pressure sensing detection table is installed at the inner bottom of the experiment table base, a plurality of sets of sensing empty grooves are evenly formed in the pressure sensing detection table, and a hydraulic guide pressure box is arranged in the experiment box; the beneficial effects of the utility model are that through the integrated extrusion impact compression resistance test and the integrated multi-group compression liquid injection hydraulic test structure, the detection cost is reduced, the detection diversity is improved, the manual operation is reduced, and the use convenience and the test efficiency are improved.

The invention relates to the technical field of hydraulic test equipment, in particular to a pump valve integrated reliability comprehensive test system, and aims to solve the problems that existing pump valve test equipment is single in stress simulation and cannot cooperatively apply working stress and environmental stress. The system comprises an environment simulation unit, a pump valve tested piece, a working fluid loop, a flexible connection mechanism and an integrated intelligent console. The environment simulation unit comprises a three-comprehensive test box and a vibration table, and the three-comprehensive test box is arranged on the vibration table; a pump valve tested piece is arranged in the three-comprehensive test box; the working fluid loop is arranged outside the test box and comprises a circulating water pump and a pressure tank; the flexible connecting mechanism penetrates through the wall of the test box to communicate the external working fluid loop with the internal pump valve tested piece; the integrated intelligent console cooperatively controls the vibration table, the three comprehensive test boxes and the working fluid loop, so that multiple composite stresses such as vibration, temperature and humidity, flow and pressure are simultaneously applied to the tested pump valve piece.

The utility model relates to an explosion-proof motor shell hydraulic pressure test device, and belongs to the technical field of explosion-proof motor production, the explosion-proof motor shell hydraulic pressure test device comprises a base, an upper sealing gasket, a lower sealing gasket and a hydraulic mechanism arranged on the base, the surface of the upper sealing gasket is provided with a water inlet hole, the output end of the hydraulic mechanism is fixedly provided with a pressing block, and the pressing block is provided with a water inlet pipe; the water inlet pipe is communicated with the water inlet hole and externally connected with a pressure system, the surface of the base is concavely provided with a water storage tank, the water storage tank is externally connected with a drainage pipe, sliding rails are symmetrically fixed to the base, supporting tables are symmetrically and slidably connected to the sliding rails, and lower sealing gaskets are arranged on the surfaces of the supporting tables. According to the device, two supporting tables are arranged, when one supporting table moves to the bottom of the hydraulic mechanism for testing, the other supporting table can conduct feeding and discharging actions of a motor shell, the two supporting tables conduct testing alternately, feeding and discharging can be conducted on the other supporting table in the testing process of one motor shell, and therefore uninterrupted testing is achieved; and the test efficiency is improved.

The utility model discloses a hydraulic test device for a chemical pipeline, which comprises a base and a protective box, the protective box is arranged at the top of the base, a supporting plate is arranged at the upper part in the protective box, a gear shaft is arranged between the inner walls, close to one side of the front surface, above the supporting plate in the protective box through a bearing seat, and gears are arranged at positions, corresponding to tooth mark strips, on the gear shaft; first telescopic rods are arranged on the tops, close to the front face, of the supporting plates on the inner sides of the gears, the output ends of the first telescopic rods penetrate through the supporting plates to be fixedly connected with pipe covers, arc-shaped clamping blocks are arranged on the two sides in the pipe covers, and springs are evenly arranged on the tops and the bottoms of the outer sides of the clamping blocks to be connected with the inner walls of the pipe covers. According to the utility model, by protecting the connecting pipe, the connecting pipe can be prevented from being damaged, and before a test, the clamping block can be used for clamping and limiting the connecting part, so that the connecting part can be prevented from deviating during the test, and the test result can be prevented from being influenced.

The invention discloses a hydraulic system and a high-pressure large-flow inertia load hydraulic test bench and method, and the hydraulic system comprises a loading oil cylinder which comprises a first bidirectional hydraulic cylinder and a second bidirectional hydraulic cylinder; the reversing valve is connected with the loading oil cylinder and comprises a first reversing valve and a second reversing valve; a first inertia loading guide hydraulic cylinder; a second inertia loading guide hydraulic cylinder; the first inertia loading motor is connected between the two oil ports of the first inertia loading guide hydraulic cylinder; the second inertia loading motor is connected between the two oil ports of the second inertia loading guide hydraulic cylinder; and the plurality of switch valves are used for switching the connection relationship between the loading oil cylinder and the reversing valve, and under the action of the reversing valve, the first bidirectional hydraulic cylinder and the second bidirectional hydraulic cylinder realize a bypass working mode, a series working mode and a parallel working mode.

A hydraulic testing system and method for a high-temperature, high-pressure feedwater pump includes a main circulation loop system, a steam heating system, a makeup water system, and a cooling water system. The main circulation loop system includes an integrated water tank. The outlet of the integrated water tank is sequentially connected to an inlet shut-off valve, an inlet regulating valve, and the inlet of the high-temperature, high-pressure feedwater pump. The outlet of the high-temperature, high-pressure feedwater pump is sequentially connected to an outlet regulating valve, a flow meter, a first shut-off valve, and a heat exchanger before returning to the inlet of the integrated water tank. The steam heating system is connected to the inside of the integrated water tank for heating the medium. The makeup water system is connected to the integrated water tank for automatically replenishing the medium loss. The cooling water system is connected to the heat exchanger for cooling the circulating medium. The system features a compact structure, high degree of automation, precise parameter adjustment, and safe and stable operation.

The invention provides a full-automatic intelligent testing method and system for a hand-operated direction valve for a hydraulic support, and belongs to the technical field of hydraulic support direction valve testing, and the method comprises the steps: calling a corresponding digital twinborn model according to the model information of a tested hand-operated direction valve, and obtaining standard test parameters to carry out the pretest of the tested hand-operated direction valve; calibrating the digital twin model through a parameter optimization algorithm; and executing a reversing performance test on the tested hand-operated reversing valve based on the calibrated digital twinborn model. Automatically switching test items according to a preset test sequence, reconstructing a corresponding hydraulic test loop, and solving an optimal control instruction based on the calibrated digital twin model and a safety constraint optimization algorithm; and after all the test items are completed, comprehensively analyzing the commutation performance test data and other item test data, and generating a test report. According to the invention, automatic adaptation and precise testing of different types of hand-operated direction valves can be realized, and the testing precision, efficiency and automation level are improved.

The utility model discloses a hydrostatic test tool for a conductive copper pipe, which relates to the technical field of hydrostatic tests for conductive copper pipes and comprises a support structure and a test mechanism. The test mechanism comprises a lifting seat, a connecting piece, a first sealing piece, a second sealing piece, a lifting assembly and a moving assembly; a supporting plate, a supporting rod, a clamping piece, a clamping block, a limiting block, a limiting rod and a limiting spring can support and limit a conductive copper pipe, and a hydraulic cylinder, a moving rod, a second rack, a second gear, a first gear, a first rack, a lifting rod and a guide rod control a first sealing piece and a second sealing piece through a lifting base to adjust the height. The driving motor, the bevel gear structure, the lead screw transmission device and the connecting piece control the first sealing piece and the second sealing piece to seal the conductive copper pipe, hydrostatic tests can be rapidly carried out on different conductive copper pipes, and the test efficiency of the hydrostatic test tool is improved.

The present application relates to the technical field of nickel alloy pipe water pressure detection, and discloses a thin-walled nickel alloy pipe inner wall hydraulic test detection system and method. The method comprises establishing a closed water pressure environment in the pipe and applying a preset pressure gradient, collecting pipe wall deformation response data through a distributed sensing array; generating a composite feature matrix containing axial strain, circumferential stress and radial displacement features through multi-dimensional feature extraction, inputting a material performance degradation evaluation model, simulating microstructure changes to output a potential defect distribution map. The water pressure gradient and pressure holding time are dynamically adjusted according to the map, a second hydraulic test is performed, and micro-deformation sequence images are captured through high-frequency imaging; the deviation amount is identified by comparing the images with the model prediction results, the model parameters are iteratively updated to optimize the detection threshold; the test is completed using the optimized threshold, and the qualified pipe section marker and defect pipe section positioning coordinates are output, thereby improving the comprehensiveness and accuracy of thin-walled nickel alloy pipe inner wall defect detection.

The utility model discloses a pipeline reel structure of hydraulic test equipment, which belongs to the technical field of hydraulic test equipment, and comprises a hydraulic test equipment box body, a pipeline reel mechanism is arranged on the outer wall of one side of the hydraulic test equipment box body, and the pipeline reel mechanism comprises two support side lug plates which are symmetrically arranged, a reel piece and a servo motor, a finger air cylinder is arranged right in front of the reel piece, two clamping claws are symmetrically arranged at the working end of the finger air cylinder, and a pipeline penetrates through the position between the two clamping claws and is wound and wound to the reel piece. Wherein the outer wall of one supporting side lug plate is further provided with a swing arm assembly used for driving the finger air cylinder to swing in an arc mode along the outer circumferential track of the reel piece to adjust the position and angle of the finger air cylinder, and when the swing arm assembly drives the finger air cylinder to move in an arc mode, the finger air cylinder clamps the pipeline and bends the pipeline to lock the looseness of the pipeline. The pipeline clamping device clamps a pipeline, the pipeline is prevented from sliding off from the reel piece or being wound disorderly, safety is improved, and manual intervention is reduced.

The invention provides a closed pump motor loading hydraulic test system which comprises an oil supply way, a motor module, a first connecting oil way, a second connecting oil way, an adjusting module, a cartridge valve group and an oil return way, the oil supply way is connected with one end of the cartridge valve group, and the other end of the cartridge valve group is connected with the first connecting oil way and the second connecting oil way. The third end of the cartridge valve set is connected with an oil return oil way, the oil return oil way is connected with the oil supply oil way through a first reversing valve, the first connecting oil way is connected with the adjusting module through a second reversing valve to form a first adjusting oil way, and the second connecting oil way is connected with the adjusting module through a second reversing valve to form a second adjusting oil way. The motor module is connected with a connector PA1 in the first connecting oil way and a connector PB1 in the second connecting oil way. Through mutual cooperation of the overflow valves in the different branch oil paths, multiple different hydraulic oil pressures required by the loading motor during testing can be accurately adjusted, so that the accuracy of the testing result of the loading motor is ensured.

The utility model relates to a hydrostatic test device for tube head samples of a high-pressure heat exchanger. The test device comprises a plurality of heat exchange tube samples, the test device further comprises two tube plate samples, and the tube plate samples are provided with shoulder butt joint grooves which are located on the peripheries of the round holes in the tube plate samples. The two tube plate samples are connected together, the butt joint grooves of the shoulders on the two tube plate samples form a sealing cavity, each heat exchange tube sample is arranged in the sealing cavity, and the two ends of each heat exchange tube sample penetrate through the corresponding round holes in the two tube plate samples to extend out and are welded with the two tube plate samples, so that a tube head sample is formed; the two tube plate samples which are connected together are provided with a test water inlet / outlet and a pressure gauge interface, the test water inlet / outlet and the pressure gauge interface are communicated with the sealing cavity, during test, the test water inlet / outlet is connected with a sample water inlet / outlet pipeline, and a pressure gauge is mounted on the pressure gauge interface. A pressure test shell and a pipe plug are omitted, so that materials are saved; and the size of the tube plate sample can be reduced when the same number of tube heads is required.

The invention provides a hydraulic test system for a hydraulic cylinder, and the system comprises an oil tank which stores hydraulic oil; an input oil path of the first main pump is communicated with the oil tank; the first main oil way reversing pressure regulating valve group is communicated with an output oil way of the first main pump; an input oil path of the second main pump is communicated with the oil tank; the second main oil way reversing pressure regulating valve group is communicated with the output oil way of the second main pump, and a flow collecting valve is arranged between the output oil way of the first main pump and the output oil way of the second main pump; wherein the rated displacement of the first main pump is configured to be smaller than the rated displacement of the second main pump, and the oil path drift diameter of the first main oil path reversing pressure regulating valve group is smaller than the oil path drift diameter of the second main oil path reversing pressure regulating valve group, so that at least two tested hydraulic cylinders with different specifications are connected.

The utility model discloses a hydraulic test device for pipe parts, which relates to the field of hydraulic test devices for oil and gas exploitation pipe parts and comprises a valve group module, a pump group module, a safety isolation chamber and a control center. According to the utility model, the safety isolation chamber formed by the plurality of detachably connected isolation coamings and the corresponding top cover coamings is designed, the length of the safety isolation chamber can be adjusted according to the length of a test pipe part, so that the hydraulic test equipment can adapt to multiple test scenes, and in addition, the pump group module and the valve group module are integrated, so that the test efficiency is improved. The equipment is fast and convenient to hoist, transport and mount, the deployment period is shortened, the pump end unloading valve is connected with the one-way valve pipeline, and before the high-pressure pressurizing test of the pipeline component, the pump end unloading valve is opened to protect the one-way valve and prevent the one-way valve from being damaged by high pressure.