589 results about "Pressure.drive" patented technology

The invention discloses an anti-jamming coal mining drilling machine with drilling and multidirectional impacting functions and a using method thereof.The anti-jamming coal mining drilling machine comprises a drilling machine body, a high-pressure driving mechanism is arranged on the drilling machine body through a multidirectional guide rail mechanism, and a drilling assembly is connected with the high-pressure driving mechanism; when the drilling machine works, the high-pressure driving mechanism drives the drill rod and the drill bit to conduct rotary drilling, the high-frequency transverse vibration mechanism synchronously generates transverse high-frequency vibration, the high-pressure driving mechanism drives the drill rod and the drill bit to conduct rotary drilling, and the high-frequency transverse vibration mechanism drives the drill rod and the drill bit to conduct rotary drilling. The friction force between the drill bit and rock is reduced, debris accumulation is prevented, efficient deslagging is achieved, when hard rock or drill jamming occurs, the longitudinal vibration impact mechanism triggers longitudinal vibration, impact and drill jamming prevention functions are achieved through cooperative work of transverse vibration and longitudinal vibration, the drill jamming problem under the complex geological condition is effectively solved, the drilling efficiency and equipment reliability are improved, and the drilling cost is reduced. The device is suitable for drilling operation of mining roofs and baseplates, sides and the like.

The invention discloses a hydrostatic guideway performance testing device and a hydrostatic guideway performance testing method, the testing device comprises a base, a limiting part, an oil supply assembly, a pressure reducing valve, a driving part, a detection assembly and a processor, the base is used for installing two guideways, a guideway groove is arranged between the two guideways, and the limiting part is arranged at the tops of the guideways. The oil supply assembly enables oil films to be generated between the static pressure sliding block and the inner wall face of the guide rail groove and between the static pressure sliding block and the limiting part. The pressure reducing valve is used for adjusting the pressure of the oil film between the limiting part and the static pressure sliding block. The driving part is used for driving the static pressure sliding block to slide in the guide rail groove. The processor is at least used for calculating the rigidity of the oil film, judging the bearing capacity of the static pressure sliding block through the rigidity of the oil film and judging whether the motion performance of the static pressure sliding block meets the standard or not through the temperature of oil in the static pressure sliding block and the flow of the oil in the static pressure sliding block. The static pressure guide rail performance testing device solves the problem that a static pressure guide rail performance testing device in the prior art cannot comprehensively test the performance of a static pressure sliding block.

The invention relates to the technical field of sealing devices, in particular to an ocean deepwater oil and gas exploitation sealing device which comprises a sealing ring, a clamping connection pressing ring and a downward-pressing driving ring, and the downward-pressing driving ring is connected with a feeding tool in a clamped mode through a plurality of locking rods. According to the well head sealing device, locking between the sealing ring and the well head is achieved, locking between the pressing-down driving ring and the casing hanger is also achieved, the sealing device is connected with the well head and the casing hanger in a clamped mode, when shaking occurs, the probability of separation is reduced, and upward extraction and separation between the sealing device and the well head and between the sealing device and the casing hanger are avoided. When the thrust sleeve on the feeding tool presses the clamping pressing ring downwards, the clamping pressing ring drives the guide plate to vertically slide downwards, so that clamping between the locking rod and the feeding tool can be separated, that is, after the sealing device is installed, the sealing device and the feeding tool can be separated, and a breaking point does not need to be arranged.

A pressure-actuated switch having a pressure port, a diaphragm, a range spring, an actuator plate, a differential plate, and an electrical switch. A certain pressure level moves the diaphragm against the range spring at the pressure port and thus deflects the actuator plate. The actuator plate is coupled to the electrical switch via a snap spring, wherein the electrical switch can be switched on or off via the deflection of the actuator plate and the snap spring. The differential plate controlled by a differential spring is connected to the actuator plate and supports the actuator plate in a first portion of movement, wherein the differential plate is decoupled from the actuator plate in a second portion of movement of the actuator plate.

The utility model discloses embedded type double-station burning equipment. The embedded type double-station burning equipment comprises burning mechanisms which are arranged in pairs, the burning mechanism comprises a carrier plate body used for placing a chip, a movable probe plate, a detachable pressing assembly and a VPC module, the carrier plate body is located above the probe plate, the pressing assembly comprises a pressing driving part and a pressing plate, and when the probe plate moves to the position below the pressing assembly, the pressing driving part drives the pressing plate to press the chip. And the pressing driving part drives the pressing plate to move downwards so as to press the carrier plate body on the probe plate. According to the utility model, the burning efficiency of the chip is improved, and the switching test of different types of chips is facilitated.

The invention provides an ultrasonic driving circuit, an ultrasonic radar and a vehicle, and relates to the technical field of ultrasonic devices. The capacitor is connected with the power supply module, and the capacitor is also used for being connected with the ultrasonic transducer; the power supply module is used for charging the capacitor; the capacitor is used for providing a positive pressure driving signal and / or a negative pressure driving signal for the ultrasonic transducer; wherein the detection ranges of ultrasonic waves emitted by the ultrasonic transducer driven by the positive pressure driving signal and the negative pressure driving signal are different. According to the invention, the detection distance of the ultrasonic wave emitted by the ultrasonic transducer can be increased, and the integration area of the whole ultrasonic drive circuit is not increased.

The invention discloses a fluid pressure driving type controllable rubber sealing device and a control method thereof. The fluid pressure driving type controllable rubber sealing device comprises a sealing ring, a pressure adjusting device and a monitoring control system. The sealing ring comprises a plastic ring and a rubber outer ring; the pressure adjusting device comprises a rubber inner ring, a fluid conveying pipe and a valve element. The monitoring control system comprises a monitoring device, a microprocessor, a controller and a voltage transformation device. According to the control method, the leakage amount of the sealing element is monitored in real time through the monitoring device, the compensation pressure needed by the annular pressure cavity in the rubber inner ring is obtained through analysis and calculation of the microprocessor, the pressure transformation device is controlled by the controller to open and close the valve element, contraction and expansion of the sealing element are achieved, and the purpose of accurately controlling leakage is achieved. The environment adaptability of the sealing element is enhanced, long-term stable operation of sealing is ensured, and the service life of the sealing element is prolonged.

The invention relates to an automatic press-fitting system for a rotor and a spline shaft, which is characterized in that a laser sensor is used for detecting the reflected light intensity difference of a tooth crest and a tooth groove, and a PLC (Programmable Logic Controller) calculates the angular deviation of the spline shaft in real time based on a difference signal and generates a rotation instruction; after receiving the instruction, the servo motor drives the spline shaft to adjust at a certain increment angle; the suction cup tool sucks the rotor end face through a vacuum suction cup and moves to the position coaxial with the spline shaft; and the servo press drives the rotor to press with constant pressure, the PLC synchronously analyzes the press-in force and displacement, when the displacement reaches a preset range, it is judged that meshing succeeds, and when the displacement does not reach the preset range, it is judged that tooth crest interference occurs, and a reverse rotation correction process is triggered. The system can realize high-precision angle detection and dynamic correction, improves the one-time success rate of engagement of the spline shaft and the rotor, is suitable for precision assembly scenes such as a new energy automobile electric drive system and an industrial speed reducer, effectively reduces the manual intervention cost, and improves the production takt time stability.

The invention relates to the field of metal material testing, in particular to equipment for testing material performance, which comprises a testing platform, the testing platform is provided with a detection mechanism, a supporting mechanism, an extrusion mechanism and a power mechanism, the extrusion mechanism and the power mechanism are arranged on the supporting mechanism, and the extrusion mechanism comprises an extrusion block and a reversing unit for adjusting the orientation change of the extrusion block. At least one end of the extrusion block is open, the extrusion block is used for shearing and crushing a to-be-tested substrate, and a rotating handle is arranged on the extrusion block; and the power mechanism comprises a shearing driving unit and a pressure driving unit which are used for driving the extrusion block to move. By implementing the scheme, the test efficiency of the magnesium alloy material under various test conditions is improved.

The application relates to the technical field of well drilling, and is a motor control type variable-diameter stabilizer, which comprises a variable-diameter mechanism, a pressure driving mechanism, a non-magnetic drill collar, a control outer shell and a variable-diameter joint which are sequentially and threadedly connected together from top to bottom, the variable-diameter mechanism comprises a righting block which is slidingly installed in an installation sliding groove, the variable-diameter joint is provided with a limiting ring, a reset spring is arranged between the installation sliding block and the limiting ring, the variable-diameter joint is provided with a plurality of sinking grooves, a piston is arranged in each sinking groove, the variable-diameter joint is provided with a liquid storage channel, a communication hole which is in communication with the liquid storage channel is arranged on the inner side wall of each sinking groove, the control outer shell is internally provided with the pressure driving mechanism, the non-magnetic drill collar is internally provided with a control system, and the pressure driving mechanism is electrically connected with the control system. The application has the advantages of reasonable and compact structure, convenient use, safety, labor saving and high efficiency, and the righting block is controlled by forming a pressure difference at the variable-diameter joint and extending.

The invention relates to the technical field of robot servo control, in particular to a low-pressure drive control intelligent servo control method for a walking robot and a driving device. The method comprises the following steps of collecting a user behavior control instruction output by a decision unit, performing behavior semantic analysis and intelligent servo parameter regulation and control, and generating a bottom layer servo control instruction; a robot foot end sensing parameter set is collected, foot end pressure distribution calculation is carried out, terrain interaction state analysis is carried out, and a real-time terrain interaction state map is constructed; robot action behavior prediction is carried out based on a bottom layer servo control instruction and a real-time terrain interaction state map, and a full-joint load distribution sensing model is constructed; and performing minimum output power demand calculation based on a full-joint load distribution perception model, performing dynamic power distribution, and constructing a low-voltage driving control engine. Driving parameters are dynamically adjusted according to environment changes and load trends, and efficient and stable motion control of the walking robot is achieved.

The invention discloses a building external wall heat preservation structure, and belongs to the technical field of building external wall heat preservation, the building external wall heat preservation structure comprises an external wall, a first wallboard and a second wallboard, the first wallboard and the second wallboard are fixed on the outer side wall of the external wall, water storage cavities are formed in the first wallboard and the second wallboard, a water inlet is formed in the top surface of the first wallboard, and a port adjusting assembly is arranged in the first wallboard; a pressure adjusting assembly is arranged in the first wall plate, and a clean discharging assembly is arranged in the opening adjusting assembly. The water inlet is automatically sealed through the arranged opening adjusting assembly, so that excessive impurities in the external environment are prevented from entering the water storage cavity through the water inlet, the efficient performance of a temperature adjusting medium is maintained, the pressure adjusting assembly is triggered through the opening adjusting assembly to seal and press down water in the first wall plate to a certain degree, and the sealing effect is improved. And the pressure adjusting assembly is driven by the pressure of the liquid to block the gap between the two adjacent second wallboards, so that permeation and transmission of cold and heat energy through the gap between the second wallboards are greatly reduced, and the heat preservation effect of a building is improved.

The utility model discloses a filtering device for water paint production, and particularly relates to the field of filtering devices, the filtering device comprises a filtering box, the top of the filtering box is fixedly communicated with a feeding pipe, the bottom of the right side of the filtering box is fixedly communicated with a discharging pipe, and a valve is mounted on the discharging pipe; and a filtering mechanism is mounted in the filtering box. When the filtering device is pushed inwards and the sliding blocks make contact with the surfaces of the insertion blocks, the contact force enables the insertion blocks to move outwards till the insertion grooves correspond to the insertion blocks in position, so that the connecting springs lose pressing force, the insertion blocks are driven to move inwards to be inserted into the insertion grooves, and therefore the filtering device is fixed. When the filtering device needs to be taken out, a pushing block is pressed inwards, the pushing block drives a first piston to move inwards, air pressure drives two second pistons to move outwards, the second pistons move to drive two pushing pieces to move outwards through a connecting rod, the pushing pieces push two inserting blocks out of a pushing groove, and the filtering device is pulled out outwards. Therefore, the filtering device is convenient to mount and dismount.

The utility model discloses visual mouth matching equipment for vacuum cup processing, which comprises a rack, and a turntable mechanism, a cup mold ejecting mechanism, a mouth matching front detection support frame and a pressing support frame which are arranged on the rack, a mouth matching front detection mechanism is arranged on the mouth matching front detection support frame, and a pressing mechanism is arranged on the pressing support frame. The cup mold ejection mechanisms comprise cup molds used for fixing vacuum cups, the cup mold ejection mechanisms are correspondingly arranged below the opening matching front detection mechanism and the pressing mechanism, and the opening matching front detection mechanism comprises a front detection camera with a lens facing the corresponding cup mold ejection mechanism. The downward pressing mechanism comprises a downward pressing driving source arranged on the downward pressing supporting frame, a downward pressing telescopic rod driven by the downward pressing driving source to move up and down, a downward pressing guiding assembly arranged on the downward pressing telescopic rod and moving up and down along with the downward pressing telescopic rod, and a downward pressing buffering assembly arranged at the end of the downward pressing guiding assembly. The utility model solves the problems of low production efficiency, unstable rate of finished products and the like in the production process of the conventional opening matching procedure of the vacuum cup.

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.

Provided in the present invention is a double-layered liner structure comprising: a sub-structure; and a coating layer formed on top of the sub-structure.

The invention discloses a preparation device and process of hydrophobic lightweight concrete, and relates to the technical field of concrete processing, the preparation device comprises a base, a pedestal, a die holder, a vibration mechanism, a pressing plate, a hydraulic cylinder, a height adjusting mechanism and a one-way valve structure; the height adjusting mechanism communicates with the exhaust channel and is configured to drive the pressing plate to descend relative to the hydraulic cylinder through the pressure of gas entering the exhaust channel so as to reduce the distance between the pressing plate and the upper surface of the raw material. According to the invention, the special one-way valve structure is arranged on the pressing plate and matched with the up-and-down reciprocating motion of the die holder, so that air extruded from raw materials can be actively exhausted to the exhaust channel in the vibration process, and most of air can be effectively exhausted even if the vibration time is relatively short, so that the tap density of the raw materials is ensured, and the production efficiency is improved. And the layering phenomenon of light and heavy materials caused by long-time vibration is avoided, so that the overall quality and the yield of the lightweight concrete are remarkably improved.

The invention provides a cooling device, a control method, a compression system and an air conditioner, the cooling device comprises a cooling unit and a vacuum pump, the cooling unit comprises an oil storage tank and an oil conveying tank, an oil inlet and an exhaust port are formed in the upper end of the oil conveying tank, and an oil outlet is formed in the lower end of the oil conveying tank; the oil inlet pipeline communicates with the oil storage tank and the oil inlet. The exhaust pipeline communicates with the vacuum pump and the exhaust port. Under the action of the vacuum pump, air in the oil conveying tank is exhausted, so that negative pressure is formed in the oil conveying tank; under the action of negative pressure, cooling oil in the oil storage tank enters the oil conveying tank through the oil inlet pipeline, and then the cooling oil in the oil conveying tank is output through the oil outlet pipeline; the scheme that the vacuum pump replaces a traditional oil pump is adopted, cooling oil in the oil storage tank is input into the oil conveying tank through negative pressure, then the cooling oil is output through gravity, and conveying of one or more kinds of cooling oil is achieved; due to the characteristic of negative pressure driving, the device is not influenced by the viscosity of cooling oil and can be compatible with cooling oil with different rheological characteristics; when cooling oil is replaced, only the oil conveying tank and the corresponding pipeline need to be cleaned.

The utility model relates to the technical field of cleaning and nursing devices, in particular to a nasal aspirator which comprises a shell, a suction nozzle arranged outside the front end of the shell and a negative pressure driving assembly arranged at the rear end of the shell, the shell is provided with an opening and closing assembly, the negative pressure driving assembly is provided with a one-way air valve, and a snot containing cavity is formed between the inner wall of the shell and the negative pressure driving assembly. The suction nozzle is communicated with the snot containing cavity through the opening and closing assembly, the opening and closing assembly is used for opening or closing communication between the suction nozzle and the snot containing cavity, the one-way air valve is used for communicating the snot containing cavity and the negative pressure driving assembly in a one-way mode, the air inlet end of the one-way air valve is communicated with an air pipe, and the air pipe extends into the snot containing cavity. According to the nasal discharge collecting device, the air pipe is arranged to stretch into the nasal discharge containing cavity, so that nasal discharge in the nasal discharge containing cavity cannot enter the one-way air valve, the situation that the nasal discharge leaks outwards or the one-way air valve is damaged is avoided, a containing part needed in the prior art for collecting the nasal discharge is omitted, the structure is simplified, assembly is convenient and fast, cost is reduced, and the nasal discharge collecting volume is increased.

The utility model provides inspection equipment, and relates to the technical field of overhead transmission line inspection. The inspection equipment comprises a driving structure, a main body frame, a lifting structure and a pressure detection structure, the driving structure is movably connected with the main body frame, the pressure detection structure is connected with the driving structure, the pressure detection structure is used for detecting pressure applied by the driving structure to an overhead transmission line wire or a ground wire, and the lifting structure is connected with the driving structure and the main body frame. The lifting structure is electrically connected with the pressure detection structure, and the lifting structure is configured to drive the driving structure to lift relative to the main body frame according to the pressure so as to adjust the pressure to the preset pressure. According to the inspection equipment provided by the invention, the driving structure is not easy to slip when moving on the overhead transmission line lead or the ground wire, and the inspection efficiency of the inspection equipment is prevented from being influenced.

The utility model discloses an oil unloading tank for transferring crude oil, which comprises a tank body, two opposite ends of the tank body are respectively provided with an injection port and an output port, two layers of filter plates are fixedly connected inside the tank body, the inside of the tank body is divided into three parts by the filter plates, and the three parts are sequentially divided into a first cavity, a second cavity and a third cavity from the injection port to the output port. A sampling assembly is arranged on the outer wall, corresponding to the third cavity, of the box body, blow-down valves are arranged on the inner walls, corresponding to the first cavity and the second cavity, of the box body, and pressure assemblies are arranged on the outer walls of the first cavity and the third cavity. The pressure assembly is arranged in the oil unloading tank body, pressure distribution in the tank body can be changed, pressure difference is formed in the tank body, and crude oil is driven by pressure to penetrate through the filter screen, so that the filtering efficiency is improved.

The invention relates to the technical field of industrial circulating water treatment, in particular to a negative pressure driven micro-nano bubble industrial circulating water descaling treatment system which comprises a water quality monitoring module, a negative pressure generation and control module, a micro-nano bubble generation module, an intelligent descaling execution module, a network communication module and a man-machine interaction and visualization module. According to the system, personalized and precise descaling management is realized through multi-source data fusion, water quality prediction, dynamic descaling demand analysis and global optimization strategy generation; and meanwhile, bubble diffusion and self-cleaning functions are integrated, the descaling efficiency and the operation stability are improved, and risk early warning and closed-loop optimization capabilities are achieved. The operation efficiency of the industrial equipment can be remarkably improved, the energy consumption is reduced, and the system reliability and management convenience are enhanced.

The invention discloses an anchor rod pull-out test device, and particularly relates to the technical field of pull-out test devices, and the anchor rod pull-out test device comprises a confining pressure loading mechanism which comprises a confining pressure box for placing an anchor rod test piece and three groups of independent confining pressure loading units which are respectively installed at the top, the left side and the right side of the confining pressure box, each confining pressure loading unit comprises a loading end and a confining pressure driving assembly, and the confining pressure driving assembly drives the loading end to move towards the anchor rod test piece; the axial tension loading mechanism comprises a clamping head assembly and a tension driving device, one end of the clamping head assembly is used for being connected with an anchor rod of the anchor rod test piece in a clamping mode, the other end of the clamping head assembly is connected with the tension driving device, and the clamping head assembly is driven by the tension driving device to move in the direction away from the anchor rod test piece; and the confining pressure driving assemblies and the stretching driving devices are all in signal connection with the control system. The complex stress environment of an engineering site can be accurately simulated, test data conforming to actual working conditions are obtained, and the engineering economy and safety are effectively improved.

The invention discloses an energy storage battery module and manufacturing equipment thereof, the battery module comprises a frame body, a support plate is mounted at the bottom of the frame body, the frame body and the support plate form a battery box, and a battery pack is contained in the battery box; the manufacturing equipment is welding equipment, a laser welding head is arranged on one side of the first support, and the supporting plate and the frame body which abut against each other can be welded together through the laser welding head. A frame body is positioned from the inner side through a right prism in the equipment, accurate positioning is achieved through air pressure driving, the problem that the frame body deforms due to inconsistent force when a clamp is manually used for fixing is solved, the shape stability of the frame body is guaranteed, and then the quality consistency of subsequent welding is improved; the whole positioning, feeding and pressing process is automatically carried out, the frame body and the cover plate do not need to be fixed by manually adjusting the clamp for multiple times, the manual operation time is shortened, the complexity degree is reduced, and the production efficiency is remarkably improved.

The invention belongs to the technical field of refrigeration and heating equipment, and particularly relates to a reversing valve and an air conditioner heat pump system. Comprising a pressure driving assembly and a channel adjusting assembly. The channel adjusting assembly comprises a plurality of fluid channels, and each fluid channel comprises at least one fluid medium inlet and a fluid medium outlet; the fluid channels are separated by blocking elements; the pressure driving assembly comprises at least two cavities and a moving element used for blocking the two cavities, connectors serving as pressure driving channels are arranged in the two cavities respectively and used for generating pressure difference to drive the moving element to move, and the moving element is used for driving the blocking element to move so as to change the path of the fluid channel. According to the multi-way valve, the pressure difference serves as driving force, the valve element generates axial displacement or rotary motion, automatic switching of the working modes of the multi-way valve is achieved, and the working modes of a system are switched by switching the flow direction of fluid. And an automatic reversing function can be realized without extra electric energy or mechanical power input.

The invention discloses a die-casting integrated system for an aluminum alloy template, and relates to the technical field of aluminum alloy die-casting, the die-casting integrated system comprises a base, a fixed seat is mounted in the middle of the top end of the base, a movable seat is slidably mounted on one side of the fixed seat, a fixed die is embedded in the side end face of the fixed seat, and a movable die is embedded in the side end face of the movable seat; according to the energy recycling device for the die-casting system, energy of the die-casting system can be recycled, the effective utilization rate of the energy in the die-casting process is increased, and the economic benefit of die-casting work is improved; the die-casting work of aluminum alloy molten slurry can be achieved under the condition that equipment is driven by external electric pressure, the cost of a die-casting system is reduced, driving force can be circularly overlaid, the die-casting pressure is secondarily amplified, the obtaining difficulty of the die-casting pressure is reduced, the effective use range of the die-casting system is widened, and the forming effect of die-casting parts is improved.

The invention particularly relates to a flexible telescopic vacuum pipeline based on pneumatic driving, and solves the problems of high working complexity, low efficiency, inaccuracy and uncontrollability in the mounting and dismounting process of the existing vacuum pipeline. The vacuum pipeline comprises a fixed flange, an inner corrugated pipe, an outer corrugated pipe, a lap joint flange, an air hole and an air pipe, one end of the inner corrugated pipe and one end of the outer corrugated pipe are respectively and fixedly connected with the inner end of the fixed flange, the other end of the inner corrugated pipe and the other end of the outer corrugated pipe are respectively and fixedly connected with the inner end of the loose flange, and an annular sealing cavity is formed among the inner corrugated pipe, the outer corrugated pipe, the fixed flange and the loose flange; the inner corrugated pipe and inner cavities of the fixed flange, the lap joint flange, the external high-pressure pipe and the external low-pressure pipe form a vacuum cavity; an air hole is formed in the inner end of the fixing flange, one end of the air pipe is connected with the air hole, the other end of the air pipe is connected with external air source equipment, and the air pipe is used for inflating the annular sealing cavity to extend the vacuum pipeline or exhausting air to shorten the vacuum pipeline.

The application provides an automobile air conditioner manifold assembly, which comprises a manifold, a plurality of slots are equidistantly formed in the manifold, and a drying pipe is installed on the manifold through fixing pieces, and the fixing pieces are at least two in number and are used for fixing the drying pipe on the manifold. When the filter bag is blocked by sundries for a long time, the refrigerant passing through the filter bag is hindered, the pressure in the drying pipe is increased, the first piston block is driven to move along the inside of the L-shaped pipe, the second piston block is driven to move upwards along the L-shaped pipe through the hydraulic oil transmission between the first piston block and the second piston block, the fixing rod on the top of the second piston block moves along the hollow rod until the squeeze control switch, the control switch starts the alarm in the automobile to give an alarm, and thus the excessive pressure in the manifold can be conveniently and timely prompted, and the refrigerant can be prevented from leaking due to the excessive pressure.

The application relates to the technical field of hydraulic control, in particular to a jitter prevention system applied to a load-sensitive proportional multi-way valve, which controls the flow supply of a hydraulic system through the opening change of a pressure compensator, the pressure compensator is driven by an initial pressure P1 collected at a load-sensitive signal LS collection point, the initial pressure P1 presents irregular sawtooth fluctuation; the initial pressure P1 is subjected to filtering and voltage stabilizing treatment through an S-shaped damping bridge circuit, the S-shaped damping bridge circuit converts the fluctuating initial pressure P1 into stable target pressure P4, so as to drive the pressure compensator to smoothly act, and realize the continuous and stable supply of system flow.

The present invention relates to a system and a pressure activated valve for preventing fluid from passing through an ICD during installation and commissioning of a production string in a well bore. Further the invention relates to a method for operating the pressure activated valve. The pressure activated valve can be arranged outside the production string being configured to hinder fluid from entering the ICD from a reservoir when the pressure activated valve is closed and to allow fluid from entering from the reservoir when pressure activated valve is open.