137 results about "Pressure work" patented technology

The invention relates to the technical field of mining monitoring, in particular to an intelligent mining monitoring system and method for a coal mine, and the system comprises a propulsion recognition module, a pressure work imbalance recognition module, a rotating speed cooling linkage module, a cooling efficiency delay module and a monitoring output module. According to the method, the abnormal response in the propelling process is disclosed step by step by collecting the propelling displacement and resistance change sequence of the tunneling oil cylinder, calculating the gradient change of propelling and resistance, comparing propelling and load mismatching sections and further analyzing the asynchronous behavior of the pressure intensity and the motor power, the coupling relation between a hydraulic system and a power system is extracted layer by layer, and the abnormal response in the propelling process is disclosed step by step. For coupling of start and stop of a cooling pump and the rotating speed of a main drive motor, a water temperature change curve is combined, a dislocation segment with the cooling response lagging behind mechanical restability is positioned, and it is determined that response delay exists when equipment deals with temperature rise. Segments with reduced thermal conduction efficiency are screened to identify cooling efficiency issues due to a mismatch of hydrodynamic force and thermal conduction response.

According to the comparison test method for testing the sealing performance of the valve by using the water pressure and the air pressure, different leakage opening degrees are designed for the test valve under different water pressure test pressure working conditions of the test valve; a water pressure drop method sealing test device and an air pressure flow method sealing test device are respectively used for carrying out a comparison sealing test on the same leakage opening degree to obtain different leakage rates of the water and the air medium under respective test pressures under the leakage opening degree, and finally, the leakage rate conversion relation of the water and the air medium under different test pressures is analyzed and obtained. The device is used for finding out the leakage rate conversion relation of water and gas media under different test pressures, and solves the problems that the leakage rate detected by a gas pressure flow method cannot directly reflect the valve leakage condition and is lack of acceptance standards.

The invention belongs to the technical field of marine clutches, and discloses a clutch connecting and discharging control system and a clutch connecting and discharging control method. The clutch connecting and discharging control system comprises an oil conveying pipeline, a first pressure regulating valve and a first control valve, the oil conveying pipeline comprises a first branch and a second branch, the first branch is used for being connected with a clutch, and the second branch is used for being connected with a lubricating point of a gearbox; the first pressure regulating valve is arranged on the second branch, the first pressure regulating valve is provided with a regulating oil port A0, a regulating piston and a regulating spring, the regulating oil port A0 is connected with the first branch through a regulating pipe, and the regulating piston can move under the pressure action of oil in the regulating oil port A0; the first control valve is arranged on the adjusting pipe and can be switched between a low-pressure working position and a high-pressure working position. The clutch engagement control system can reduce the impact when the clutch is engaged so as to realize the stability when the clutch is engaged.

The utility model discloses an active pressure working claw which comprises a fixing disc, a lead screw motor is arranged on one end face of the fixing disc, a fixing sleeve is coaxially arranged on the other end face of the fixing disc, a high-speed motor is arranged at the end of the fixing sleeve, the high-speed motor is connected with a working disc, and at least three push rods are evenly hinged to the edge of the fixing disc. A sucker is hinged to the end of the push rod; an output shaft of the lead screw motor is connected with a lead screw extending into the fixing sleeve, the outer wall of the fixing sleeve is movably sleeved with a sliding ring, the sliding ring is connected with the push rod through a connecting rod, the lead screw is connected with the sliding ring through a lead screw nut base, and the lead screw motor drives the lead screw to rotate and drives the lead screw nut base to ascend and descend. The lead screw nut seat drives the three push rods to swing synchronously through the sliding rings and the connecting rods. The working disc positioning device can adapt to different working scenes, high-precision positioning of the working disc is achieved, pressure needed during construction can be actively provided for a working face, and rust removal, grinding, drilling and other operations can be completed.

The application belongs to the technical field of numerical control processing, in particular to a turning equipment for precise metal structural parts, which comprises an adjusting part, a modified seat, an annular metal part arranged at the axis of the upper surface of the modified seat, a rotating part arranged in the interior of the modified seat and used for twisting the placed annular metal part, and a butt joint part arranged at the axis of the modified seat. The device modifies the modified seat of the bearing metal part, so that the counterweight shaft cylinder can drive the heavy metal part to rotate centrifugally without being blocked by friction due to excessive pressure, thus avoiding the problems of serious wear or difficulty in rotation of the bottom of the counterweight shaft cylinder. Since the mass of the metal part is large and the rotational inertia is also large, a certain time is needed for deceleration and stopping. At this time, the lower pressure suction cylinder can perform suction and pressure work on the annular rotating groove, and the embedded rolling ball applies resistance to the rotation of the counterweight shaft cylinder, thereby promoting the deceleration of the metal part and reducing the adverse effects caused by inertia.

The invention relates to the technical field of oil and gas wellhead sealing equipment in the field of petroleum engineering, and discloses an oil and gas wellhead rotary sealing device suitable for workover treatment. The device consists of a bottom flange, a self-sealing middle body, a central pipe, a rotor upper body, a thrust bearing, a tapered roller bearing, a deep groove ball bearing, a lower rubber ring, an upper rubber ring, an upper rubber ring compression ring, a lower rubber ring compression ring, a gland and a positioning pin, is simple in structure, small in size and light in weight, adopts an integrated design, reduces redundant parts, is compact in overall structure, is convenient to mount and carry on site, and is convenient to maintain and maintain. The load burden of a wellhead is reduced; the sealing pressure is small, the sealing performance is good, reliable sealing can be achieved under the low pre-tightening pressure through the synergistic effect of mechanical pre-sealing and hydraulic sealing, and the sealing stability under the high-pressure working condition is effectively improved through the double-sealing mode; due to the design of the three-bearing structure and the detachable central pipe, the operation stability of the device under the complex working conditions of rotation, drilling and the like is guaranteed.

The invention provides a pressure sensing system compensation method and system, and the method comprises the steps: building a mathematical fitting model of an input and output pressure difference value and time under different conditions through testing and processing the data of a system in a starting time period under different input pressure and working temperature conditions, obtaining an initial environment condition when the system is started, and carrying out the calculation of the initial environment condition after the initial environment condition is obtained; and a corresponding mathematical fitting model is substituted to compensate the output pressure, so that the accurate pressure value in the system starting time period can be quickly calculated, and the performance improvement in the whole time period after the system is started is realized. According to the technical scheme, the technical problem that in the prior art, the pressure measurement precision deviation is large due to the fact that a thermal field is unbalanced in the starting period of a pressure sensing system is solved.

The utility model discloses a header welding device which comprises a fixing seat and a base, the top of the fixing seat is fixedly connected with welding equipment, the left side of the welding equipment is fixedly connected with a welding head, the center of the top of an inner cavity of the base is fixedly connected with a damper, and the bottom of the damper is fixedly connected with a pressure buffering plate. According to the header welding device, the device can be moved through the moving wheels, the time of manually carrying the device by workers is saved, the working efficiency of the workers is improved, a pressure buffering plate is conveniently driven to start pressure buffering through a damper, and the pressure buffering plate drives a sliding sleeve and a shaft rod to start pressure buffering work; and meanwhile, a sliding sleeve drives a sliding plate to start to slow pressure, and the sliding plate drives a spring to start to slow pressure, so that the shaking force generated by a bumpy road surface in the moving process of the moving wheel is effectively relieved, and the moving stability of the equipment is improved.

The present invention relates to a method for calibrating safety valves of a power station boiler. This method calibrates the safety valves of the power station boiler after the steam turbine of the generating unit is shut down. During calibration, the superheated steam in the boiler superheater is guided into the reheater steam pipeline, and the reheater steam pressure is adjusted to be stable at the set pressure working point. The safety valves of the reheater are calibrated at the pressure working point to determine the corresponding compressed air lifting pressure, forming a reheater steam pressure - compressed air lifting pressure calibration point, and judging whether the calibration point is within the set safety range. Compared with the prior art, the present invention has the advantages of high safety, accurate calibration, and high efficiency.

The utility model relates to the technical field of press machines, in particular to a hydraulic machine for manufacturing and processing automobile parts, which comprises a main body, a loading component is arranged at the top of the main body, and a pressure applying component is arranged on the side surface of the loading component; the gear on the side face of the electric hydraulic roller is meshed with the rack on the side face of the pressure rod, then the bottom end of the pressure rod exerts pressure on an object, and the press machine has the advantages of being easy to operate, wide in stroke range, completely adjustable in stroke and height position, small in operating force, large in pressure and high in working efficiency. Due to the fact that the electric press is driven by an electric motor to press downwards, an operator can use the minimum pressing force to meet the requirement for part pressing, the damping rod, the spring and the limiting end can guarantee that the electric press cannot crush a workpiece due to too large pressure, and convenience can be provided for disassembly and assembly of the press through the first clamping hoop, the second clamping hoop and the third clamping hoop.

The invention discloses a drainage reinforcement method for a soft soil foundation by combining vacuum preloading with positive-pressure air bag air outlet rods. An air outlet rod with an air bag is arranged at the center position of every four plastic drainage plates which are arranged in a square shape; and the top ports of all the air outlet rods with the air bags are connected with a positive pressure supply device. The positive pressure supply device inputs high-pressure gas to the air outlet rods with the air bags through the transverse pipelines, so that the air holes of the air outlet rods with the air bags blow out the high-pressure gas outwards in the transverse direction, the high-pressure gas moves towards the plastic drainage plates on the periphery, and then the high-pressure gas and the negative pressure working state of the vacuum preloading foundation drainage system cooperate to promote drainage. Meanwhile, the air bags on the air outlet rods with the air bags are inflated and expanded to compact surrounding soil under the action of positive pressure, so that ultra-static pore water pressure is generated in the extruded soil, and the drainage and reinforcement effect of the foundation is further improved.

The application discloses a kind of production process of PTFE pipeline of resistant vacuum steel lining, specifically includes the following steps: S1, steel lining welding, steel lining includes steel net and multiple steel bars, steel net, steel bar is formed by welding in the pipe wall of pipe body and is formed into prefabricated pipeline with steel lining;S2, PTFE inner lining blank isostatic pressing forming, the setting of steel lining in the application, increase the strength of PTFE inner lining, improve its anti-negative pressure capacity, so that PTFE pipeline can be better applicable to negative pressure working condition field, steel bar is positioned evenly in the pipe body with steel net, so that the interval between the outer periphery of steel net and the inner wall of pipe body is kept uniform, to ensure that the position of steel lining in PTFE inner lining is accurate, the thickness of PTFE inner lining after forming can keep consistent, guarantee its anti-negative pressure effect, core mould supports soft silica gel mould, so that the deformation of silica gel mould under the action of water pressure can be more uniform, to ensure the thickness of PTFE inner lining is uniform.

The invention provides an engine lubricating system, an engine and a vehicle, and relates to the technical field of engines. The crankcase has a negative pressure working condition and a positive pressure working condition, and is isolated from the oil pool box under the negative pressure working condition so as to perform negative pressure defoaming on lubricating oil in the crankcase; the oil pump is communicated with the oil pool tank under the positive pressure working condition so as to accelerate discharge of lubricating oil in the oil pump to the oil pool tank; the defoaming system utilizes the negative pressure working condition and the positive pressure working condition to conduct defoaming treatment on bubbles in the crankcase, the content of the bubbles in lubricating oil is reduced, and the service life of an engine is prolonged.

The invention relates to the technical field of waste explosive treatment, in particular to a feeding assembly and a waste explosive destroying device. A feeding main body of the feeding assembly is provided with a feeding channel extending in the first preset direction and a plurality of first cooling channels located on the periphery of the feeding channel, and the multiple first cooling channels are sequentially arranged in the first preset direction at intervals. The temperature detection unit is used for detecting the temperature of the feeding channel; the plurality of movable valve plates are movably connected with the feeding main body, and are arranged at intervals to divide the feeding channel into a plurality of sub-sections; the feeding assembly is applied to the waste explosive destroying device and can control the temperature of the feeding channel, so that the situation that waste explosive spontaneously combusts before entering a furnace can be avoided, and meanwhile, the situation that an anti-static plastic bag externally packaged with the waste explosive is fused and bonded to a feeding port before being fed can be avoided; and the feeding safety can be improved, splashes generated by sympathetic detonation are prevented from rushing out of the furnace body, and the negative pressure working condition in the hearth is guaranteed.

The invention discloses a method and tool for detecting the internal pressure of a shock absorber, the tool comprises a shock absorber body, the shock absorber body is composed of an oil storage cylinder, a working cylinder, a middle cylinder, a guider, an oil seal and a bottom valve, and the shock absorber body is provided with a pressure detector assembly. According to the invention, a pressure detection assembly composed of four pressure detectors is accurately arranged on core function devices such as a shock absorber oil seal, a guider, the middle part of an oil storage cylinder and a bottom valve, so that the limitation that only single-position static pressure detection can be realized in the prior art is broken through, and the shock absorber can be accurately detected under actual working conditions of stretching, compression and the like. Through real-time acquisition and synchronous monitoring of internal multi-key area pressure data, core detection dimensions such as oil seal gas sealing lip pressure, upper and lower pressure of a working cylinder and internal pressure of an oil storage cylinder are fully covered, and the technical blank of multi-position pressure cooperative detection of a shock absorber under a dynamic working condition in the industry is filled. And a more systematic and more accurate pressure data support is provided for performance optimization of the shock absorber.

The utility model discloses an electric high-flow negative-pressure workstation, which belongs to the technical field of suckers and comprises a shell, end covers are respectively arranged at two ends of the shell, two electromagnetic valves are arranged in the shell, a diaphragm pump is arranged in the shell and communicated with the two electromagnetic valves, a quick connector is arranged at the top of the shell, and the quick connector is communicated with the two electromagnetic valves. The two electromagnetic valves are connected with the quick connector, and a negative pressure filter is further arranged on the top of the shell and communicated with the electromagnetic valves. The visual negative pressure filter is additionally arranged, the problem that dust easily enters a traditional electric suction cup is solved, and the negative pressure filter can be replaced at any time.

The present invention discloses a pressure regulating system and a pressure regulating method thereof. The pressure regulating system includes: a pilot-operated two-way three-way valve and a pressure sensor connected to the pressure control chamber of the pressure working component. The pilot-operated two-way three-way valve includes a pilot valve disposed on one side of the valve seat and a main valve disposed on the other side of the valve seat. The pressure sensor and the coil assembly of the pilot valve are electrically connected to the electronic control unit respectively. The pressure regulating method of the present invention can not only achieve the state where port A is connected to port P and the state where port A is connected to port T, but also achieve the state where port A is not connected to both port P and port T during the pressure holding stage. The coil assembly is switched on and off at a set frequency to control the reciprocating movement of the main spool, dynamically regulate the pressure of port A, and keep the pressure of the pressure control chamber connected to port A in the system stable, meeting the working requirements; and simplify the structure and reduce the cost.

The invention relates to a lower plastic part and cover plate assembly, comprising a plastic part main body mounted between a cover plate and a battery cell; an anti-explosion valve is arranged on the cover plate, and a supporting part is arranged on the plastic part main body; part of the supporting piece is located between the plastic piece body and the anti-explosion valve, and the supporting piece is used for supporting the anti-explosion valve. The lower plastic part is a part between the battery cover plate and the battery cell, and the supporting part is located on the side, facing the anti-explosion valve, of the plastic part body and used for supporting the anti-explosion valve. The supporting piece can be designed into a single type, an independent type or a mixed type, the top end attaching part is a smooth plane, all the attaching parts are kept on the same horizontal plane, and uniform supporting is achieved. Reverse support is provided under the negative pressure working conditions of vacuumizing, liquid injection and the like, unexpected sinking of the anti-explosion valve, especially a nick and thinned weak area is prevented, meanwhile, the fracture pressure relief function of the anti-explosion valve under the abnormal high pressure is not intervened, it is guaranteed that the anti-explosion valve can be fractured along a preset path when the anti-explosion valve is abnormal, and gas can be rapidly exhausted.

The invention discloses thin-wall stainless steel water supply pipe ring pressing type connecting and installing construction equipment and method, and relates to the technical field of pipe fitting connection. The method comprises the following steps that the end of a pipe and an external cylindrical sealing material are inserted into a pipe fitting, and air pressure borne by the end face of a sliding block is limited; the on-off valve is closed to limit the initial air pressure in the air cylinder and the air cylinder, the direction of the annular pressure head is corrected, the air pump is started, and after the air pressure reaches an annular pressure air pressure threshold value, annular pressure work of the water pipe is completed. Deformation of the water pipe under the action of unbalanced force is avoided, the annular pressure effect is improved, annular pressure errors caused by abrasion loss of the annular pressure head are made up, the annular pressure precision is improved, the trouble of frequent replacement of the clamp seat and the annular pressure head is solved, the convenience of annular pressure work is improved, the directions of the pipe, the pipe fitting and the annular pressure head can be corrected and limited, and the effectiveness of the annular pressure work is guaranteed.

The present invention relates to a method for preparing a Frame substrate for OLED, and the preparation process adopted is medium frequency furnace melting, LF refining, VD refining, pouring, surface treatment, hot rolling, solution treatment, leveling, flaw detection, water cutting, aging treatment, flattening, inspection, and finished product packaging. The present invention is subjected to a heat treatment system of solution treatment, leveling, aging treatment, and flattening, combined with the support and pressure provided by pressure-bearing tooling and pressure-applying tooling; it is convenient for industrial production and ensures that the straightness of the Frame substrate is ≤1.0mm and the expansion coefficient is ≤1.4×10 ‑6 / ℃.

An energy recovery type scroll compressor and a carbon dioxide heat pump system using same. The compressor comprises: a scroll compression mechanism, a driving mechanism, and a scroll expansion mechanism; one end of a motor shaft (703) of the driving mechanism is transmittingly connected to the scroll compression mechanism, and the other end is transmittingly connected to the scroll expansion mechanism; the motor shaft (703) of the driving mechanism is transmittingly connected to a loaded orbiting scroll (5) of the scroll expansion mechanism, and the end of an unloaded orbiting scroll (3) of the scroll expansion mechanism distant from the loaded orbiting scroll (5) is an air intake hollow shaft (1); and an air inlet is communicated with an expansion end high-pressure working medium channel (a), and an expansion cavity of the scroll expansion mechanism is communicated with an expansion end low-pressure working medium channel (b).

The present application aims at providing a turbine blade reverse rotation air blowing loss measuring method, two turbine test pieces are designed, one turbine test piece is provided with a complete set of double-layer turbine blades, and a partition structure is used to block air from passing through the reverse rotation channel, and the other turbine test piece is provided with only forward rotation blades without reverse rotation blades. During the test, under the same air source inlet parameters, compressed air is used to drive the two turbine test pieces to rotate respectively, and the output power is measured, the output power of the reverse rotation turbine before modeling is obtained through a turbine modeling conversion relationship, the difference between the two output powers is the air blowing loss generated by the reverse rotation of the reverse rotation blades, and the influence of the structural size, gas temperature, gas pressure, working speed and other parameters on the reverse rotation air blowing loss of the turbine blade is obtained through finite element simulation calculation. The present application can solve the problem of measuring the reverse rotation air blowing loss of the double-layer turbine blade, and is an air blowing loss measuring method with simple operation and high measuring accuracy.

The application relates to the technical field of hydraulic transmission control, and discloses a method and system for driving and controlling a plunger pump by a servo motor, wherein the method for driving and controlling the plunger pump by the servo motor comprises the following steps: obtaining initialization data and equipment configuration parameters of a servo motor control system; performing hardware state detection and pressure working condition parameter configuration through a controller; establishing a quantitative relationship between the rotating speed of the servo motor and the output flow of the plunger pump; performing pressure working condition identification and mode switching, and verifying the working characteristics of the plunger pump; performing solenoid pulse width modulation control; determining a current working mode, performing mode-specific rotating speed strategy formulation and proportional-integral-derivative parameter adaptive control; and performing multi-mode performance comparison and cooperation effect analysis; the application can intelligently identify pressure working condition changes and automatically perform smooth mode switching, thereby ensuring optimal control performance under different working conditions.

The invention provides an integrated vacuum controller compatible with positive and negative pressure input, which is applied to the technical field of vacuum controller equipment, and through a confluence plate, positive pressure inlet air is collected into the interior through the confluence plate to perform air inlet and locking work on a subsequent vacuum generation assembly; the first positive pressure air inlet is formed in one side of the confluence plate and is used for breaking air; the second positive pressure air inlet is formed in one side of the confluence plate and is used for generating vacuum; the problems that when an existing vacuum controller controls one or more vacuum generators, it is usually difficult to be compatible with the vacuum quantities and vacuum breaking quantities corresponding to the multiple vacuum generators, if a user wants to provide multiple negative pressure power sources, the multiple vacuum generators are needed, but the multiple vacuum generators cannot be bought and connected in a scattered mode one by one, and the user experience is poor are solved. Even if the wire harnesses are too many, the wire harnesses are troublesome and complex, but if the wire harnesses are combined together, the pneumatic balance can not solve the technical problem of corresponding negative pressure work.

To provide an earth bucket fly-prevention structure for caissons that can certainly prevent the incident of earth buckets' flying and a soil removal method applied in a pneumatic caisson construction method.SOLUTION: An earth bucket fly-prevention structure for caissons prevents an earth bucket from being pushed out with compressed air and then flying even when the compressed air in a high-pressure work space is released upon the encapsulating door of a material lock being damaged and flows into a material shaft. In the structure, the material shaft that is meant for an earth bucket transporting out the excavation soil excavated in the high-pressure work space to run through is a double-tube material shaft composed of an inner tube 2 and an outer tube 3. The aforesaid inner tube 2 of the double-tube material shaft has a slit part 2a formed on it that is capable of releasing the aforesaid compressed air from the inside of the shaft through the outside.SELECTED DRAWING: Figure 5

The utility model discloses a data line production metering device, which belongs to the technical field of data line production, comprises a base, and is characterized in that one end of the base is provided with a winding mechanism for taking up a data line, and the other end of the base is provided with a metering mechanism for measuring the take-up length of the data line; the data line production metering device has the beneficial effects that the data line production metering device with the two take-up stations can work without stopping the machine to disassemble a line roller and installing the other line roller, so that the production efficiency is improved; when the movable block is matched with the meter counting wheel to work, the data line can be well extruded, so that the data line is not easy to slide, the data line cannot be crushed, and the working requirement of the pressure of the meter counting wheel can be met; and the movement of the sliding plate can drive the pressing wheel and the meter counting wheel to linearly move back and forth, so that the data line is uniformly wound on the line roller.

The utility model is suitable for numerical control angle saw field provides a numerical control angle saw with pressure structure, include: numerical control angle saw main part, be used for saw cutting processing, including saw cutting platform and saw blade seat, saw blade seat rotation is installed in saw cutting platform side face, feed frame, symmetry is installed in saw cutting platform both sides, is used for feeding, two pressure assembly, be used for to saw cutting material's fixed, symmetry is located saw blade seat saw blade both sides, pressure assembly includes: mounting seat, fixed mounting is installed on saw cutting platform, its side face fixed mounting has a plurality of hydraulic cylinders, pressure seat, fixed mounting is installed in the telescopic link end part in hydraulic cylinder. The utility model is through two pressure assembly of symmetrical setting to saw cutting material carries out pressure fixed, and carries out saw cutting through the saw blade seat of setting, compares with current numerical control angle saw, need not extra use pressure tool, and based on setting hydraulic cylinder, automatic pressure work is carried out, pressure speed is fast, and pressure effect is better.

The application discloses a compressed oxygen switch pressure reducer flow automatic detection device, and relates to the technical field of compressed oxygen equipment detection.The device takes the latest national standard of the isolated compressed oxygen self-rescuer as the design basis, and aims to solve the problems of low detection efficiency, large result determination error and dependence on manual operation in the process of detecting the flow of the existing compressed oxygen switch pressure reducer.The device can realize the flow detection of the switch pressure reducer under 20MPa high pressure working condition and 5MPa low pressure working condition through the construction of a multi-channel test gas path, and can automatically complete the classification of the detection results through four channels based on the preset standard, wherein only the products with the flow of 1.5L / min under 20MPa high pressure and the flow of 1.2-1.5L / min under 5MPa low pressure are determined as qualified, and the rest are classified into the unqualified channel.The application realizes the automation of flow detection and sorting, improves the detection accuracy and efficiency, and meets the quality control requirements in the production process of the isolated compressed oxygen self-rescuer.

The present invention relates to a plate-fin heat exchanger, comprising a bottom surface and a sealing box, wherein the left and right ends of the bottom surface are both connected with side surfaces, and the upper and lower ends of the bottom surface are both installed with end plates, the sealing box is located on the outside of the end plate, and the upper left end of the side surface is installed with a high-pressure working medium inlet, the lower right end of the side surface is connected with a high-pressure working medium outlet, and the middle part of the bottom end of the sealing box is connected with a low-pressure working medium inlet. The beneficial effects of the present invention are as follows: in the plate-fin heat exchanger, the high-pressure working medium is input from the high-pressure working medium inlet on the side of the shell, and flows to the high-pressure working medium outlet along the high-pressure working medium channel in the heat exchange plate bundle; then, the low-pressure working medium is input from the low-pressure working medium inlet of the sealing box to the sealing box, and then enters the low-pressure working medium channel in the heat exchange plate bundle and flows to the low-pressure working medium outlet; it is ensured that the heat exchange plate pair is always under the action of positive pressure difference (external pressure is greater than internal pressure), so that the heat exchange plate pair is in a compressive stress state, and the integrity of the pressure boundary between the high-pressure working medium and the low-pressure working medium is maintained.

This utility model discloses a relay oil flow measurement device, including a measuring device and a pressure flange disposed at both ends of the top of the relay. The relay includes a relay piston, a relay cylinder, a relay rear end cover, and a relay front end cover. The measuring device and the pressure flange are respectively connected to the relay rear end cover and the relay front end cover. The oil flow measurement device also includes a pressure device, the output end of which is connected to the measuring device and the pressure flange. The beneficial effect of this utility model is that the device can also be used for relay pressure work and driving the relay piston movement. The device can accurately measure the oil flow between the relay piston and the cylinder, providing a test measurement means for relay maintenance quality.