522 results about "Medium pressure" patented technology

The invention discloses a temperature and pressure sensor for a new energy automobile, and belongs to the technical field of sensor equipment, the temperature and pressure sensor comprises a plug assembly, a shell and a protective sleeve, a support seat, a circuit board, a temperature sensing probe and a pressure sensing element are arranged in the shell, the protective sleeve is arranged at the lower waist part of the support seat, and the temperature sensing probe is located in the protective sleeve and is in electric signal connection with the circuit board; a square groove for containing the pressure sensing element and the circuit board is formed in the top of the support base, the pressure sensing element is arranged at the bottom of the circuit board and is in electric signal connection with the circuit board, and a pressure transmission channel is further arranged in the shell. The pressure transmission channel comprises a gap part defined by a protective sleeve and a shell and a special-shaped channel formed in the support base, a circular pressure groove is formed in the square groove, the circular pressure groove is matched with the pressure sensing element to form a pressure cavity which is eccentrically designed relative to the shell in the axial direction, and the special-shaped channel is formed in a medium leading-in area. Therefore, the medium entering surface area can be increased through the eccentric design, and the response speed of medium pressure measurement is ensured.

The invention discloses a pilot valve control method and device based on data detection and automatic pressure regulation, and relates to the technical field of pilot valves. The method comprises the steps that the medium pressure of a piston containing cavity is obtained in real time through a pressure sensor, and the displacement amount of a piston shaft is obtained in real time through a displacement sensor; querying a pre-stored pressure-displacement correlation curve based on the medium pressure to determine a target displacement amount; generating an adjusting signal according to the deviation data of the real-time displacement and the target displacement; and the pressure regulating component is controlled to dynamically regulate the pretightening force of the spring to realize pressure closed-loop control. The device comprises a mechanical execution unit, a data detection unit and a control processing unit, all the units work cooperatively, closed-loop control over pressure adjustment is achieved by detecting medium pressure and piston shaft displacement in real time and dynamically adjusting spring pre-tightening force, and the device has the advantages of automatic calibration, manual intervention reduction and control precision improvement.

The invention discloses an automatic medium-pressure online detection and closed-loop control method for die steel, relates to the technical field of medium-pressure online detection, and is used for solving the problems that the probability of production deviation is increased and the precision of medium-pressure interval range adjustment is reduced due to abnormality discovery lag. Collecting a pressure fluctuation value and an off-center peak value to comprehensively judge whether the conditions are abnormal; when an abnormal instruction is generated, entering a pressure test stage, calculating a pressure scaling interval based on vibration deviation and fan frequency, adjusting a default pressure interval to obtain a new pressure control interval, and comparing the new pressure control interval with a pressure value; and when the temperature exceeds the range, the surface temperature uniformity of the steel billet is detected, a fault-tolerant proportional adjustment pressure scaling interval is calculated, a control interval is updated and subjected to secondary comparison, whether an abnormal instruction is eliminated or not is determined, production abnormity is found in time, the abnormity judgment accuracy is improved, the abnormity is found in time, and the dynamic adjustment precision of the pressure control interval is improved.

The invention relates to the technical field of coal mine underground drilling equipment, in particular to a gyrator for a coal mine directional drilling machine and a using method.The gyrator comprises a shell, an input shaft and an output shaft, the shaft extension end of the output shaft is provided with a pressure balance type multiple dynamic sealing system, and the sealing system comprises a main sealing unit, a pressure balance unit and a dustproof sealing unit; the pressure balance unit comprises a sealing cavity, a lubricating grease injection channel and a grease injection nozzle; pressure lubricating grease is injected into the sealing cavity through the grease injection nozzle, so that a dynamic positive pressure barrier higher than the internal medium pressure of the gyrator and the external pressure of the environment is formed in the sealing cavity; through a triple sealing structure formed by combining the spring seal main seal, the pressurization balance cavity and the V-shaped dustproof ring and by combining an active injection and dynamic balance using method, passive blocking of traditional sealing is converted into active defense, the problem of invasion of high-pressure slurry and pulverized coal is effectively solved, and the service life of the sealing device is prolonged. And the working reliability and the service life of the equipment are obviously improved.

An accumulator assembly includes a medium pressure accumulator having an MPA cavity including at least one brake-side passage adjacent a first end thereof. A powered MPA two-way valve is interposed fluidically between the brake-side passage of the MPA cavity and at least one corresponding wheel brake. The MPA two-way valve includes an MPA two-way valve cavity placing the brake-side passage of the MPA cavity and the at least one corresponding wheel brake in selective fluid communication via both of an MPA two-way valve fill fluid path configured to provide pressurized hydraulic fluid to the MPA cavity and an MPA two-way valve supply fluid path configured to remove pressurized hydraulic fluid from the MPA cavity.

The utility model discloses a high-temperature-resistant flash valve exhaust nozzle structure which comprises a pipe body and an energy reduction structure. The energy reduction structure comprises at least two stages of ceramic energy reduction units which are connected in series, and the ceramic energy reduction units are connected in the pipe body; the ceramic energy reduction unit comprises a first-stage energy reduction assembly and a second-stage energy reduction assembly; the first-stage energy reduction assembly comprises a first ceramic spray pipe and a first liner pipe; the first lining pipe sleeves the outer side of the first ceramic spray pipe; the first liner tube is arranged in the tube body; the second-stage energy reduction assembly comprises a second ceramic spray pipe and a second liner pipe; the second lining pipe sleeves the outer side of the second ceramic spray pipe; the second liner tube is arranged in the tube body; the end of the first ceramic spray pipe abuts against the end of the second ceramic spray pipe. And a medium flows out of the pipe body after sequentially passing through the first-stage energy reduction assembly and the second-stage energy reduction assembly from the inlet end of the pipe body. According to the multi-stage energy reduction device, the multi-stage energy reduction assemblies connected in series are adopted, medium pressure can be decomposed into stage-by-stage release, and therefore the fluid speed is effectively reduced, and dependence on a high-temperature adhesive is also avoided.

The invention relates to a variable load leakage and deformation controllable mechanical sealing device, and belongs to the technical field of mechanical sealing.The variable load leakage and deformation controllable mechanical sealing device comprises a shaft sleeve, a shell, a first mechanical sealing mechanism and a second mechanical sealing mechanism, and the shell is provided with a lubricating liquid inlet and a lubricating liquid outlet; the first mechanical sealing mechanism is arranged between the shaft sleeve and the shell, the second mechanical sealing mechanism is arranged between the shaft sleeve and the shell, a liquid cavity is defined by the first mechanical sealing mechanism, the shaft sleeve, the shell and the second mechanical sealing mechanism, and the lubricating liquid inlet and the lubricating liquid outlet are both communicated with the liquid cavity. The pressure of lubricating liquid entering from the lubricating liquid inlet is dynamically changed, the pressure of the lubricating liquid is always larger than the pressure of a medium in the circulating pump, and the pressure difference is within a preset range. The mechanical seal has the advantages that the use effect of the mechanical seal is effectively guaranteed under the condition that the medium pressure in the circulating pump changes, and the mechanical seal can be suitable for the high-pressure variable-load working condition.

The invention provides a non-contact measuring device and method for medium pressure in a pipeline based on an ultrasonic surface wave array, and the device comprises an ultrasonic surface wave array transmitting module, an ultrasonic surface wave receiving module, a signal amplification circuit, a high-speed signal collection card, a drive circuit, and an industrial control computer. Respectively sending driving instructions to the driving circuit when the medium pressure in the test pipeline is zero and the test pipeline is in a working state; after the amplified ultrasonic surface wave signals are received, extracting frequency signals including a zero-pressure state ultrasonic surface wave array frequency f0 and a working state ultrasonic surface wave array frequency f, calculating to obtain an ultrasonic surface wave array frequency difference value, and calculating a pressure indicating value through a pressure calculation formula; based on the ultrasonic surface wave array, the pressure of the medium in the pipeline is inverted by measuring the frequency of the ultrasonic surface wave, high-precision non-contact measurement of the pressure of the medium in the pipeline can be realized, and the sensor belongs to a novel mechanical sensor.

The invention discloses a regulating valve capable of quickly realizing large and small flow switching and a control method thereof, relates to the technical field of regulating valves, and is obviously different from a conventional regulating valve in improvement of a valve rod structure. The initial purpose is to meet the requirement for medium flow fluctuation in an upstream channel through the moving capacity of the movable valve rod, the control method comprises three stages of self-weight balance, information interaction and opposite regulation and control, opening balance is completed through a balancing weight, then the medium flow and valve element opening information are combined, and the valve element opening degree is adjusted and controlled. Two times of opening degree switching are achieved through the fixed valve rod and the electromagnetic action assembly in sequence, the fluid flow fluctuation scene can be adapted, the pressure fluctuation influence during opening degree switching is reduced, firstly, self-adaption can be conducted according to the medium flow change in an upstream channel, and secondly, active interference can be conducted through the electromagnetic action assembly; the passing requirement of a medium in a downstream channel is ensured, and the negative influence caused by medium pressure is reduced.

The invention relates to the technical field of bearings, in particular to a comprehensive evaluation method and system for the sealing performance of a deep groove ball bearing. According to the method, the actual working state of the deep groove ball bearing is obtained through the dynamic contact half width and the contact stress, the health condition of a sealing part can be reflected more accurately, and the dynamic characteristics of the sealing change in the working process of the bearing can be captured in time by measuring the total contact pressure and the contact stress in real time; by monitoring the pressure driving leakage rate and the centrifugal effect leakage rate of the contact area of the sealing lip and the bearing ring, the sealing performance can be evaluated more directly and accurately, and by monitoring the dynamic oil film thickness and the medium pressure difference of the contact area in real time to obtain the leakage rate, the sealing state can be reflected more accurately. By comprehensively considering various factors such as the pressure driving leakage rate and the centrifugal effect leakage rate, a more comprehensive sealing efficiency index can be obtained, and the accuracy and reliability of sealing performance evaluation are improved.

The invention provides a valve device. The valve device comprises a main valve component, a bypass valve component and a communicating pipe. When the medium pressure difference of the inflow runner part and the outflow runner part of the main valve part reaches the preset value, the first valve port part of the bypass valve part can be opened for pressure relief, the bypass valve part and the main valve part are integrated, and the problem that the pressure relief function is lost due to reverse installation of the bypass valve part does not exist. The bypass valve component is provided with the pressure gauge connector part, the bypass valve component has a bypass function and a cut-off function, a channel between the pressure gauge connector part and the main valve component can be cut off, and the safety problem when the pressure gauge is connected is solved.

The utility model discloses a straight-through type hydraulic stop valve which comprises a valve body, a piston type valve element and a valve seat, an overflowing channel is arranged in the middle of the piston type valve element in a penetrating mode, the piston type valve element is arranged in the valve body in a sliding mode, and a sliding part attached to the inner wall of the valve body is arranged on the periphery of the piston type valve element. A first cylinder seat and a second cylinder seat are installed at openings in the two ends of the valve body respectively, the inner wall of the first cylinder seat and the inner wall of the second cylinder seat are attached to the outer wall of the piston type valve element, a first cavity is formed between the first cylinder seat and the sliding part, and a second cavity is formed between the second cylinder seat and the sliding part. A first medium channel and a second medium channel which are communicated with the first cavity are formed in the side portion of the valve body in a penetrating mode, the valve seat is installed at one end of the valve body, and an overflowing hole is formed in the valve seat. The valve element is driven to move close to or away from the valve seat in a hydraulic driving mode, opening and closing of the valve are achieved, the opening and closing action is rapid, upstream medium pressure does not need to be considered, and the using reliability and convenience of the valve are greatly improved.

The utility model provides a switch cabinet pressure relief channel and a medium voltage nuclear power switch cabinet equipped with the pressure relief channel, the switch cabinet pressure relief channel comprises two groups of side plates arranged in parallel, the tops of the two groups of side plates are fixedly equipped with a top cover plate, the two ends of the two groups of side plates are fixedly equipped with sealing plates, and the side plates, the top cover plate and the sealing plates form a box-shaped structure. The top cover plate is provided with a vent hole, an inner lining plate is fixedly mounted at the bottom of the top cover plate, an outer lining plate is arranged at the top of the top cover plate, a supporting plate is mounted between the inner lining plate and the top cover plate, and the outer lining plate, the inner lining plate and the supporting plate correspond to the vent hole in position. The medium-voltage nuclear power switch cabinet is provided with the switch cabinet pressure relief channel, so that when an arcing fault occurs in a compartment of one medium-voltage nuclear power switch cabinet, internal arcing gas can be timely discharged after being filtered layer by layer. And personnel and equipment in the power distribution room can be effectively protected from being damaged.

The invention relates to a control method, device, equipment and medium for stepped cascade electric adjusting valves, and belongs to the technical field of centrifugal separation of isotopes. The method comprises the steps that a preset pressure value and an actual pressure value corresponding to each electric adjusting valve are obtained; determining a pressure deviation value based on the preset pressure value and the corresponding actual pressure value; determining a pressure deviation change rate of the pressure deviation value based on the pressure deviation value; the pressure deviation value and the pressure deviation change rate serve as input values to be input into a fuzzy controller, output values are obtained, and the output values comprise # imgabs0 # and # imgabs1 #; superposing the output value with a set value of a controller to obtain an adjustment parameter; and the opening degree of each electric adjusting valve is adjusted based on the adjusting parameters, so that when the actual pressure value of one unit changes, the fuzzy controller adjusts the opening degrees of the electric adjusting valves of the other units according to the adjusting parameters, and the medium pressure in the low-vacuum medium environment is controlled. The pressure control device has the effect of effectively controlling the medium pressure.

The invention provides a supercritical carbon dioxide power generation working medium pressure adjusting system, belongs to the technical field of power generation system working medium pressure adjusting, and can at least partially solve the problems that in the existing unit start-stop and load adjusting process, the system pressure is greatly changed, normal operation of a unit is affected, and the working efficiency is low. The system comprises a power generation module, and the power generation module comprises a compressor and a heat regenerator connected with the compressor through a pipeline; the carbon dioxide working medium circulating system is provided with the gas storage tank, part of the carbon dioxide working medium is stored in the gas storage tank through the differential pressure of the high-pressure part and the low-pressure part of the circulating system, the working quality of the circulating system is adjusted, and the carbon dioxide working medium circulating system has the advantages of being simple and convenient to operate.

The invention provides an integrated ball valve which comprises a valve body and an actuator, a ball body is arranged in the valve body, the actuator is in driving connection with the ball body through a valve rod, the integrated ball valve is characterized by further comprising an electromagnetic valve, a first piston cylinder and a second piston cylinder, a first piston is arranged in the first piston cylinder, and a second piston is arranged in the second piston cylinder. A first piston is arranged in the first piston cylinder, a second piston is arranged in the second piston cylinder, the first piston and the second piston are in meshed connection with the valve rod, and the electromagnetic valve is used for introducing medium pressure on the high-pressure side of the valve body into the first piston cylinder and / or the second piston cylinder so that the first piston cylinder and / or the second piston cylinder can act. The piston cylinder is arranged on the valve body, medium pressure is introduced, driving force is formed at the two ends of the piston through medium pressure difference, the driving force and the actuator are combined to drive the valve rod to achieve rapid opening and closing of the valve, and the problems that an actuator of an existing high-pressure working condition integrated ball valve is large in size and weight and long in opening and closing time are solved.

An annular groove is formed in a valve body, a piston ring and a valve seat ring are arranged in the annular groove, a movable valve seat is arranged at the front end of the valve seat ring, the movable valve seat is matched with a butterfly plate in a conical surface hard sealing mode, and a drainage hole is formed in the bottom of the annular groove. A reverse medium enters the annular groove through the drainage hole to push the piston ring, the piston ring pushes the valve seat ring, and the valve seat ring pushes the movable valve seat, so that the movable valve seat is wedged on the sealing surface of the butterfly plate; when a medium flows in the forward direction, the downstream is a low-pressure area, the piston ring is pushed to the bottom of the annular groove, the valve seat ring and the movable valve seat are pushed by the medium to be tightly attached to the sealing face of the butterfly plate, the larger the medium pressure is, the larger the sealing force is, and the medium pressure self-sealing effect is achieved; the movable valve seat is pushed by a medium to be tightly attached to the sealing face of the butterfly plate for compensation, and therefore the whole sealing pair can keep the sealing performance of a new valve after being opened and closed at high frequency.

The invention discloses a staged opening double-disc flat gate valve and a sealing specific pressure adjusting method thereof, the flat gate valve comprises a valve body, a piston plate is arranged in a middle cavity formed between the valve body and a valve cover, the piston plate divides the middle cavity into an upper middle cavity and a lower middle cavity, and a cavity pressure adjusting mechanism is arranged on the piston plate; a center plate is arranged at the lower end of the valve rod, left and right disc springs are respectively arranged between the center plate and the left and right flashboards, and the center plate is in graded lifting fit with the left and right flashboards; a hole channel communicated with the outlet cavity is formed in the bottom of the valve body, the lower middle cavity can be communicated with the hole channel through the flashboard separation cavity, and a sealing plug is arranged at the lower end of the center plate and matched with the hole channel; according to the sealing specific pressure adjusting method, the medium pressure in the lower middle cavity is adjusted through the cavity pressure adjusting mechanism so as to adjust the acting force of the medium in the lower middle cavity on the left gate plate and the right gate plate, and therefore the sealing specific pressure of the sealing pairs between the left gate plate and the left valve seat and between the right gate plate and the right valve seat is adjusted. Adjustment of the gate sealing specific pressure is achieved, and leakage is reduced; the gate is opened in a staged mode, and abrasion is reduced.

The present invention discloses an in-service closing valve action test structure for an axial flow check valve in the field of on-line valve detection. A guide rod is connected to the medium pressure-bearing surface of the valve flap. The guide rod is inserted into a guide rod hole. A test hole communicating with the guide rod hole is provided on the fairing. A test interface is provided at a position corresponding to the test hole on the valve body. At the same time, a plurality of drainage holes are opened on the fairing. One end of the drainage hole is connected to the guide rod hole, and the other end leads to the medium pressure-bearing surface of the valve flap. The present invention can conveniently and efficiently detect and test the closing valve action of the axial flow check valve.

The invention belongs to the technical field of nuclear power, and particularly relates to a pressure self-driving type separation pressure relief device. The device is driven to be opened through unbalanced force caused by medium pressure to the valve rod assembly. The separation structure is arranged, and the bearing bush and the separator can complete the separation action when the required separation pulling force is applied; the protector is of an integrated structure, one end of the protector is designed to be a blind hole, the head of the protector is designed to be a weak area, zero leakage is kept in a closed state under the normal working condition, when medium pressure reaches starting pressure, the disengaging structure is disengaged, the valve rod breaks the protector in a pulling mode, and the opening action is completed. The whole action process does not depend on external energy, signals, manpower and other operations, has the characteristic of high reliability, and can be applied to numerous key parts needing to execute the pressure relief function.

The utility model provides a fluid medium pressure gauge adopting an embedded damping device, which comprises a damping plate, bottom plates are arranged on two sides in a sliding chute, a supporting seat is movably arranged at the top of each bottom plate, an outer protection plate is mounted at the top of each supporting seat, and a pressure gauge body is mounted on each outer protection plate. An inner buffer rubber block is arranged between the bottom of the pressure gauge body and the outer protection plate; according to the utility model, the top of the damping plate is provided with the supporting seat sliding on the bottom plate, the top of the supporting seat is provided with the outer protection plate, the pressure gauge body is supported by the outer protection plate, and one side of the supporting seat is provided with the damper, so that the pressure gauge body can be damped through cooperation of the supporting seat and the damper when being subjected to transverse vibration; and meanwhile, the inner buffer rubber block is arranged between the pressure gauge body and the outer protection plate, so that the transmitted vibration can be reduced through the inner buffer rubber block when the pressure gauge body is subjected to vertical vibration, and the impact on the pressure gauge body is reduced.

The utility model relates to a pilot-operated type pressure balance pneumatic valve which comprises a valve body, a valve cover and a valve rod, and a valve seat is installed at the position of a valve shoulder of the valve body. The valve body is connected with the valve cover through a bolt; a through hole is formed in the center of the valve deck, the valve rod moves up and down along the through hole in the valve deck, and a sleeve is arranged on the upper portion of the valve seat and fixed in the valve body through the valve deck. A valve clack is arranged in the sleeve and moves up and down in the sleeve; a pilot valve core is arranged in the valve clack; a pressure balance disc is arranged on the top of the pilot valve element. The thrust requirements of the valve in the opening, closing, opening process, closing process and semi-opening state are greatly reduced, the opening process and the closing process only need to overcome friction of all parts and can be achieved without overcoming medium pressure, and meanwhile the medium auxiliary sealing effect in the full-closing state of the valve is reserved; while the good sealing performance is met, the opening and closing thrust of the valve is reduced, the operability of the valve is improved, and the requirement for an actuator is reduced.

The invention relates to the technical field of ball valves, in particular to an all-welded ball valve which comprises a welded valve body, a movable valve element, a ball body and a floating valve seat. Stepped holes are formed in the left side and the right side of an inner cavity of the welding valve body correspondingly, columnar structures in sliding fit with the stepped holes in the corresponding sides are arranged at the two ends of the movable valve element correspondingly, and the two ends of the movable valve element are in sealing fit with the stepped holes in the corresponding sides through corrugated pipes I correspondingly. A springback device for driving the movable valve core to move towards the medium inlet side of the welding valve body is arranged between the movable valve core and the welding valve body; a cut-off device is arranged on the medium inlet side of the welding valve body. By arranging the pressure balance mechanism composed of the movable valve element, the rebounding device and the cut-off device, when the ball body is in the closed state, the medium pressure is mainly borne by the cut-off device, the ball body only bears the elastic force provided by the rebounding device, the sealing reliability of the valve under the high-pressure frequent opening and closing working condition is remarkably improved, and the service life of the valve under the high-pressure frequent opening and closing working condition is remarkably prolonged.

The invention relates to the technical field of outer surface safety detection in the process that a pressure pipeline deals with pressure bearing of a conveying medium, in particular to a detection device for pressure pipeline medium pressure bearing safety. The detection device comprises a first restraining part and a second restraining part, the front ends of the first restraining part and the second restraining part are movably hinged, and the rear ends of the first restraining part and the second restraining part are matched in an abutting mode. A first pneumatic part is installed on the first restraining part, a second pneumatic part is installed on the second restraining part, the first restraining part and the second restraining part are connected to the outer surface of a pressure pipeline in a sleeving mode in the using state and form a circumferential restraining track, and a dynamic surrounding detector is arranged in the circumferential restraining track in a sliding fit mode. According to the invention, rapid detection of the outer surface of the pressure pipeline is realized, whether a straight pipe section or a bent pipe section, a detector only needs to hold the device by hand to carry out simple operation, the detection work can be rapidly completed, the detection efficiency is greatly improved, and the timeliness requirement of pressure pipeline detection in different scenes is met.

The present invention relates to a check valve with forced opening with back pressure. The check valve comprises a valve body and a valve seat. The valve seat has a flow channel. A first valve flap is provided for rotation inside the valve body. A medium channel is provided on the first valve flap. A shaft is provided for rotation inside the valve body. The first valve flap is freely rotatably mounted on the shaft. A rocker is provided for synchronous rotation on the shaft. A second valve flap is provided on the rocker to realize forced opening and closing of the medium channel. A first sealing surface is provided on the second valve flap. A second sealing surface that seals with the first sealing surface is provided on the first valve flap. A driving mechanism for driving the shaft to rotate is provided on the valve body. The check valve with this structure can not only realize the requirement of forcibly opening the second valve flap under back pressure to allow the downstream medium to flow into the upstream; it can also meet the normal forward operation of the system. When the medium comes from the upstream of the pipeline, the driving mechanism drives the second valve flap to open. The positive medium pressure can directly push open the first valve flap, open the medium flow channel, and meet the requirements of normal operation.

The utility model discloses a device is unloaded to tank car with ice machine liquid ammonia simply, including compressor, ice machine system, liquid ammonia unloading pipeline, liquid ammonia pipeline, medium pressure nitrogen pipeline and tank car, ice machine system includes anti surge cooler, liquid ammonia storage jar and power saver, compressor links to each other with anti surge cooler, and anti surge cooler links to each other with liquid ammonia storage jar, and liquid ammonia storage jar links to each other with power saver, and power saver links to each other with the ammonia cooler of low temperature methanol washing system, and the ammonia cooler of low temperature methanol washing system links to each other with compressor, be connected with liquid ammonia pipeline on liquid ammonia storage jar, and liquid ammonia pipeline links to each other with tank car, be connected with liquid ammonia unloading pipeline on power saver, and liquid ammonia unloading pipeline links to each other with liquid ammonia pipeline, and medium pressure nitrogen pipeline links to each other with liquid ammonia pipeline and tank car. Advantage is: guarantee ice machine system supplement liquid ammonia and can utilize same pipeline safely and effectively when storing liquid ammonia in system and unloading, avoid the emergence of overpressure or leakage due to preparation use temporary pipeline and cause safety accident.

The pipeline pressure blocking operation multi-degree-of-freedom hydraulic manipulator device and method of the present application belongs to the pipeline repair and pressure blocking technical field, comprising: setting pressure blocking execution device, wherein the pressure blocking execution device comprises a main feeding rod and a blocking head at the end of the main feeding rod, and an embedded fine adjustment mechanism is connected between the blocking head and the main feeding rod, and the scheme adopts the parallel connection configuration of high-strength flexible hinge and micro hydraulic cylinder; the high-strength flexible hinge has very high rigidity in the axial direction, can withstand the huge axial thrust generated by the medium pressure up to 25 MPa or above, and ensures that the blocking head is not pushed back; at the same time, by using the incompressibility of hydraulic oil, the system can still realize the fine adjustment of ± 3 degrees to ± 5 degrees of pitch and yaw while maintaining high pressure bearing capacity through the coordinated action of the hydraulic cylinder, solving the pain points of easy self-locking and difficult adjustment under high pressure.

The application provides a multi-working-condition adaptive valve group, an expansion turbine and a reaction speed type expander. The multi-working-condition adaptive valve group has a distribution cavity with an air inlet and used for collecting and receiving a working medium; a plurality of valve body units are connected with the distribution cavity, each valve body unit has a different preset opening and closing pressure interval, and the opening and closing pressure interval of any valve body unit intersects with or has the same end point value as the opening and closing pressure interval of at least one other valve body unit, so that any valve body unit is closed, and at least one other valve body unit is necessarily opened. The application also provides an expansion turbine with the valve group, a reaction speed type expander applied with the expansion turbine, and the application of the expander. The valve group in the application can adaptively distribute according to the working medium pressure at the air inlet. When the valve group is installed in an expander, a compressor and other equipment or systems, the problems of under-expansion, over-expansion and other working condition matching in the prior art can be solved.

The invention discloses a vacuum composite insulation prefabricated pipe test system and method. The system comprises a steam generation module, a test pipeline module, a condensation recovery module and a sensing monitoring module. The method comprises the following steps: a steam generation module provides low-pressure, medium-pressure and high-pressure temperature-adjustable steam through a graded heating unit, the steam is introduced into a test pipeline, pressure and temperature sensors are arranged at an inlet, the middle and an outlet of the test pipeline, and multi-dimensional parameter acquisition of pressure and temperature under different working conditions is realized; in the test process, the condensation recovery module recovers condensate water and a vapor-liquid mixture to the steam generator water tank, and energy recycling is achieved. The sensing monitoring module monitors the pressure and temperature of a vacuum layer and the state of a working pipe in real time. According to the method, key parameters such as the vacuum leak rate, the thermal resistance and the thermal loss are synchronously measured through the steps of preheating, stepped temperature rise, steady state testing and the like, the actual working condition can be accurately simulated, multi-parameter synchronous measurement is achieved, the testing efficiency and accuracy are improved, energy recycling is achieved, and a safe and stable operation guarantee mechanism is achieved.

The application relates to the technical field of valve driving, and discloses a high-speed driving device and a method thereof, which comprises a cylinder body, a piston is slidably connected to the inner wall of the cylinder body, an energy storage cavity and an annular cavity are arranged at the upper part of the inner wall of the cylinder body, a buffer cavity is arranged at the lower part of the inner wall of the cylinder body, the annular cavity is communicated with the buffer cavity, the energy storage cavity, the annular cavity and the buffer cavity are all connected with an external pressure source, the energy storage cavity is connected with a first controller and a first valve, the first controller is used for controlling the opening and closing of the first valve, the annular cavity and the buffer cavity are connected with a second controller and a second valve, and the second controller is used for controlling the opening and closing of the second valve. The pressure medium of the energy storage cavity is fed in advance, when the pressure medium in the buffer cavity flows into the annular cavity, the piston can respond instantaneously, and the pressure medium does not need to be injected, under the action of the medium pressure of the energy storage cavity and the medium pressure of the annular cavity, the piston is driven downward instantaneously, and millisecond-level response of the piston is realized.