1660 results about "Liquid pressure" patented technology

The invention relates to the technical field of energy storage management, in particular to a high-energy-density liquid cooling energy storage system based on thermal management optimization, which comprises a thermal response calculation module, a thermal risk area identification module, a cooling resource allocation module, a thermal decoupling state judgment module and a charging and discharging power limiting module. According to the method, the inlet temperature, the outlet temperature and the cooling liquid flow speed of the high-energy-density energy storage equipment are obtained, the unit thermal load conversion rate is calculated, the unit thermal response deviation degree is determined, the thermal risk area higher than the standard limit is clearly recognized in the energy storage equipment, the corresponding liquid cooling channel is accurately selected, and the cooling liquid pulse flow frequency is optimized; the pertinence and timeliness of the cooling liquid in actual use are effectively improved, the local overheating hidden danger is avoided, the lag response is marked in time by monitoring the cooling liquid pressure difference and the temperature rise change in real time, the decoupling state between the cooling liquid and the thermal load is judged, the charge and discharge power dynamic reduction measure is implemented, and the trend of abnormal and continuous accumulation of the local thermal load is restrained.

Tubing connector having an inlet for a liquid and an outlet for the liquid as well a first tubing connector element and a second tubing connector element, wherein the inlet and the outlet. The connector comprises at least one first pressure measurement chamber for measuring the pressure of the liquid which is present in said first wherein the first chamber is fluidly arranged between the inlet and the first tubing connector element or between the outlet and the second tubing connector element. The measuring surface is arranged in an angled orientation w.r.t to pumping plane. Further, a blood treatment device is adapted to accommodate the tubing connector.

The invention discloses a high-precision concrete liquid penetration test integrated system and a use method. The system comprises a closed liquid containing box, a self-absorption turbine, a tank body, an upstream high-precision flow meter, a downstream high-precision flow meter, a data acquisition port set, a downstream data acquisition port set, a liquid pressure detector, a digital display differential pressure sensor, a concrete permeation device and a multi-channel recorder. The system can comprehensively collect the flow velocity, the surface pressure and the up-down pressure difference before and after the liquid flows through the concrete test piece, and synchronously display real-time data to computer software. Synchronous data acquisition ensures the accuracy of test data under different boundary conditions, and the system provided by the invention can accurately measure the permeability of concrete test pieces with different shapes and different fracture states under different pressures on the premise of not influencing the structural integrity of the test pieces.

The utility model discloses an aluminum-strontium alloy extruding and shearing automation structure which comprises two conveyors, supports on the surfaces of the conveyors on the two sides are mutually fixed, and a shearing mechanism, a detecting mechanism and a conveying mechanism are arranged on the surfaces of the conveyors. The shearing mechanism comprises a supporting frame, a first hydraulic cylinder, a mounting shell and a shearing knife; the detection mechanism comprises a linear module, a second laser sensor and a connecting frame, a first laser sensor is fixed to a sliding table on the surface of the linear module, a connecting plate is arranged below the second laser sensor, a movable plate is arranged below the connecting frame, a spring is fixed to the surface of the movable plate, and a trigger plate is fixed to the bottom of the spring. The automatic conveying and shearing device has the advantages that automatic conveying and shearing of the aluminum-strontium alloy plate can be achieved, meanwhile, the flatness quality of a tangent plane can be guaranteed, and the problem that the tangent plane of the aluminum-strontium alloy plate is prone to being uneven when the aluminum-strontium alloy plate is cut is solved.

The invention relates to the technical field of casting equipment, and discloses energy-saving furnace roller automatic cooling mold opening casting equipment which comprises an upper mold, a lower mold, an upper locking assembly, a lower locking assembly and a jacking assembly. After casting is completed, cooling liquid is continuously input into the water inlet, the outlet of the lower die cooling cavity is blocked by the sealing column, the cooling liquid is gradually accumulated in the closed lower die cooling cavity, the liquid pressure is gradually increased in a stable and controllable trend, and along with continuous increase of the pressure, the sealing plate is subjected to thrust from bottom to top, so that the sealing effect is improved. When the sealing column moves to the limiting plate, the sealing column is pushed to move upwards, in the process, the liquid pressure is not instantly exploded but is gradually increased, damage of impact force to the mold is effectively avoided, after the sealing column moves to the limiting plate, the rising pressure can push the upper mold to stably rise, and automatic mold opening is achieved. According to the mode that the liquid pressure gradually rises to complete mold opening, an additional power device is not needed, the maintenance difficulty is lowered, and meanwhile a large amount of energy consumption is saved.

The invention discloses a piston type compressor driven by liquid pressure, which is characterized in that hydraulic and gas compression components are integrated in a cylinder body, a crankshaft rotates to drive a hydraulic piston, then a gas piston is driven by utilizing the characteristic that liquid cannot be compressed, the upper part of the gas piston is filled with sealing liquid, a gap of a sealing ring is filled, and gas leakage is reduced. According to the structure, lubricating and hydraulic media can be combined into a whole, hydraulic oil is stored through the crankcase and serves as the lubricating media, and the equipment size is further reduced in the mode that an oil pump is arranged inside. And meanwhile, a multi-stage compression form can be combined, so that the discharge pressure is further improved. The invention can be used for high-pressure hydrogen filling piston type compressors of gas stations and energy storage stations, and can also be used in the field of other high-pressure and ultrahigh-pressure gas compressors.

The invention discloses a methanol direct injection injector, comprising: an injector body and a solenoid valve component, an orifice plate, a control valve seat and a needle valve component which are installed below the injector body through a tight cap of the injector body; wherein the solenoid valve component is located above the orifice plate, the orifice plate is located above the control valve seat, and the control valve seat is located above the needle valve component; a first and a second straight hole are arranged on the orifice plate, an inclined hole, a third straight hole and two small holes are arranged on the control valve seat, a needle valve component control chamber is arranged on the upper part of the needle valve component, the lower end of the first straight hole is communicated with the lower end of the second straight hole on the orifice plate and the upper ends of the inclined hole, the third straight hole and the two small holes on the control valve seat, and the lower ends of the inclined hole, the third straight hole and the two small holes on the control valve seat are communicated with the needle valve component control chamber; the opening and closing of the second straight hole on the orifice plate is controlled by turning on and off the power of the solenoid valve component, and then the methanol liquid pressure in the control chamber of the needle valve component is controlled to realize the start of the needle valve component injection.

A structure plumbing flow simulation apparatus is described herein. An example structure plumbing flow simulation apparatus may include: (1) a reservoir configured to hold a set volume of a liquid; (2) a pump connected to the reservoir configured to pump the liquid; (3) a pressure source connected to the pump and configured to pressurize the liquid from the pump which flows to a water shut off valve downstream of the pressure source; (4) one or more pipes connected to the pressure source and adapted to be connected to the water shut off valve; and / or (5) a pipette connected to the one or more pipes.

The invention belongs to the technical field of oil drilling and discloses self-sealing sampling oil drilling equipment which comprises a rotary drilling rig, a drill bit is mounted at the lower end of a drill rod of the rotary drilling rig, a functional box and a sampling box are mounted on the outer side surface of the upper end of the drill bit in an embedded manner, and mounting holes are formed in the outer side surfaces of the functional box and the sampling box. The functional box and the sampling box are fixedly mounted through mounting holes and bolts, pressure sampling mechanisms are arranged on the surfaces of the functional box and the sampling box, and collection of samples at different depths is triggered by utilizing liquid pressure when liquid is drilled. According to the oil drilling equipment with the self-sealing type sampling function, collection of samples at different depths is automatically triggered by utilizing liquid pressure when liquid is drilled, a pressure triggering mechanism of triggering time is changed by changing spring rigidity, and the samples can be accurately obtained at different target depths; depth errors caused by manual operation or repeated start and stop of drilling equipment are effectively avoided.

Provided is an endoscopic surgery system with automatic hydraulic monitoring function, comprising a control system, a cart kit and an endoscope accessory. Then control system includes a processor, a touch display, a perfusion pump, a negative pressure pump, etc. The cart kit includes a cart, a perfusion tube and an extraction tube. The endoscope accessory includes a pressure measuring guide sheath, a hydraulic sensor and an electron microscope. When the endoscope is employed for observation, the invention can control the perfusion and monitoring of the liquid in endoscope instrument, as well as the cavity liquid pressure in organs, allowing for precise control of the intracavity pressure during operation. The real-time monitoring module measures the liquid pressure in the organ in real time and sends data to the control system, calculates a state of the intracavity pressure based on real-time data obtained from the hydraulic sensor using intelligent PID control.

The invention discloses a gas lift reverse circulation drilling starting pressure and circulation gas supply pressure calculation method. The method comprises the following steps that S1, hydrostatic pressure of the bottom of an inner pipe of a double-wall drill rod is calculated; s2, calculating the friction loss pressure of compressed air of an outer annulus of the double-wall drill rod; s3, calculating the friction loss pressure of the compressed air flowing through the earth surface gas transmission channel; s4, calculating the local pressure loss of the compressed air passing through the orifice in the gas-liquid mixer from the outer pipe of the double-wall drill rod; s5, calculating the liquid phase flow friction pressure loss of the inner pipe of the double-wall drill pipe; s6, calculating the liquid-phase flow friction pressure loss of the deslagging pipeline; s7, calculating the three-phase flow pressure drop of the inner pipe of the double-wall drill pipe; and S8, the starting pressure and the circulating air supply pressure are calculated. According to the method for calculating the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling, the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling can be accurately and conveniently calculated by accurately calculating the pressure of each part of the gas lift reverse circulation drilling process, and a theoretical basis is provided for stable and efficient operation of a circulating system.

The utility model provides a mineral admixture storage device, which relates to the technical field of mineral admixture storage and comprises a slide rail, a guide groove, a storage box, a seal cover, a guide rod, a vertical rod, a blanking barrel, a feeding port, a fixed plate, a first hydraulic cylinder, a through hole, a pressing plate, a second hydraulic cylinder, a push plate mechanism, a fixed block, a push plate and a movable block. The fixed block is provided with a positioning block matched with the movable block, convex rods are arranged on the two sides of the movable block and the two sides of the fixed block respectively, and the two convex rods located on the same side of the movable block and the fixed block are connected through a tension spring. The air content in the material storage box is reduced, extra drying treatment does not need to be conducted on residual air in the material storage box, meanwhile, the admixture in the material storage box is in a compacted state, more admixture can be stored in a single material storage box, the space utilization rate of the material storage box is increased, and the using effect is good.

The invention relates to a diaphragm type energy accumulator airtightness detection method and system and a storage medium, and relates to the technical field of energy accumulators, and the method comprises the steps: obtaining the preparation completion triggering information of a diaphragm type energy accumulator; acquiring test plan information of the diaphragm type energy accumulator based on the preparation completion triggering information; according to the test plan information, controlling a preset hydraulic system to perform liquid filling test on the diaphragm type energy accumulator so as to determine pressure detection information; analyzing according to the pressure detection information and the test plan information to determine liquid pressure information of the hydraulic system; judging whether the pressure detection information meets the requirements of liquid pressure information or not; if not, prompting according to preset unqualified prompt information; and if yes, prompting according to preset qualified prompt information. The air tightness detection device has the effect of improving the air tightness detection accuracy of the diaphragm type energy accumulator.

The invention discloses a testing machine for testing the sealing performance of a sealing pair of a control valve, which comprises a closed box body, a rotary driving mechanism, a rotary lifting assembly, a lower sample replacement block, a telescopic cylinder, an upper sample replacement block, a liquid pressure supply system, a gas pressure supply system, a leakage detection system and a data acquisition and control system, and is characterized in that the rotary driving mechanism is mounted in the closed box body; the rotary lifting assembly is located in the closed box and is in transmission connection with the rotary driving mechanism. The lower sample replacement block is mounted at the top of the rotary lifting assembly; the telescopic cylinder is installed in the closed box body, and a telescopic rod of the telescopic cylinder is fixedly connected with the rotary lifting assembly. The upper sample replacement block is mounted at the top of the closed box body and corresponds to the lower sample replacement block in position; the liquid pressure supply system is connected and communicated with the sealed cavity of the upper sample replacement block; and the gas pressure supply system is aligned with a sealing interface formed between the upper sample replacement block and the lower sample replacement block. The method can improve the applicability, quantify the sealing leakage rate of the valve, and comprehensively evaluate the sealing performance of the control valve.

The present invention relates to a capsule for use in a beverage preparation machine, said capsule containing soluble and / or extractable beverage ingredients, said capsule comprising:-a capsule body (2) defining a chamber (21),-a top membrane (3) closing a top opening and adapted to be punctured for injecting a liquid into the capsule, and-a bottom membrane (4), -a bottom membrane (2) arranged inside the chamber (21) so as to define a dosing chamber between the top membrane (3) and said bottom membrane, and-an opening device (5), the opening device is arranged inside the chamber and is adapted to open the chamber by opposite engagement of the opening device with the bottom membrane (4) during injection of the liquid under the action of an increase in liquid pressure in the dispensing chamber, the bottom membrane being a laminated multilayer material, the invention relates to an opening device (5) comprising a laminated multilayer material comprising, in order:-a layer of vegetable parchment (41), and-an adhesive layer (42), and-a layer of non-woven material (43) comprising fibres wherein said fibres are biodegradable fibres, and wherein the layer of vegetable parchment faces the opening device (5).

The invention aims at disclosing a vehicle lifting machine unlocking system and a lifting height control method, and relates to the technical field of vehicle lifting machines, the vehicle lifting machine unlocking system comprises two lifting platforms which synchronously lift and are arranged in parallel, and a first lifting assembly and a second lifting assembly are symmetrically arranged; the first lifting assembly comprises a first connecting rod assembly, a first hydraulic cylinder and a first locking assembly; the first hydraulic cylinder comprises a cylinder barrel, a telescopic rod and a U-shaped frame, a pull rope sensor is arranged at the end of the telescopic cylinder, a pull rope extending out of the pull rope sensor is connected to the cylinder barrel, and the first hydraulic cylinder always drives the lifting platform to ascend and descend through a first connecting rod assembly in an inclined mode. The locking air cylinder drives the second locking piece to be close to or away from the first locking piece, and the lifting device has the technical effects that the first hydraulic cylinder always drives the lifting platform to ascend and descend through the first connecting rod assembly in an inclined mode, and the lifting height of the lifting platform is controlled through the length of a pull rope; and locking or unlocking of the first hydraulic cylinder is achieved through the locking air cylinder, and the structure is reliable.

The invention relates to a BOG (Boil Off Gas) circulating treatment method for a marine ship and land liquid cargo film tank filling process, which comprises the following steps of: carrying out primary cooling on the top temperature in a second film tank, and then further cooling the second film tank; then the supercooled liquid goods are sprayed on a second film tank, the second film tank is communicated with the first film tank to achieve gas-liquid pressure balance, and then the filling process is conducted, specifically, the liquid goods in the first film tank are conveyed into the second film tank through a liquid goods pump and a liquid phase connecting hose. Compared with the prior art, the problem that storage of compressed low-temperature liquefied gas such as LNG is affected due to the fact that the temperature of a land liquid cargo thin film tank (or a ship thin film tank) is increased due to the fact that the land liquid cargo thin film tank (or the ship thin film tank) is exposed to the sun and BOG generated by liquid cargo such as LNG is increased can be effectively solved.

A double-floating-ball gas relay double alarm method based on oil pressure and a baffle rotation angle is characterized in that a gas relay experiment platform for simulating different degrees of faults of a transformer is designed, an embedded liquid pressure transmitter is installed in a pipeline in front of a double-floating-ball gas relay, and an angle sensor is installed on a baffle rotation shaft of the double-floating-ball gas relay; the rotation angle of the baffle is monitored in real time, the baffle of the double-floating-ball gas relay is subjected to the magnetic force of the magnet, the magnetic force is exponentially attenuated along with the distance, and the baffle leaves the magnet and rotates to the heavy gas alarm angle to cause heavy gas alarm. An oil pressure signal, an oil pressure curve graph, a baffle rotation angle curve graph and an oil pressure change trend of a pipeline are collected based on a pressure sensor to serve as a determined pipeline oil pressure setting value, whether a heavy gas action occurs or not is judged based on the pipeline oil pressure setting value which is alarmed twice, and the heavy gas alarm accuracy of the double-floating-ball gas relay is greatly improved. And a new method is provided for setting the heavy gas action of the transformer.

A sensing device includes a body having a first chamber, a second chamber, and a liquid path which are filled with a liquid, the liquid path communicates with the second chamber, a pressure difference detection chip installed in the first chamber, and a pressure detection chip installed in the first chamber. The pressure difference detection chip seals an opening of the liquid path disposed on a bottom surface of the first chamber. The pressure difference detection chip detects a liquid pressure difference between the first chamber and the second chamber. The pressure detection chip detects a liquid pressure in the first chamber.

The invention relates to the technical field of check valves, in particular to an adjustable spherical check valve which comprises a valve shell, a sealing disc, a cover plate and a liquid inlet bent pipe. The top of the valve shell is connected with the sealing disc through a splicing disc C. A guide sleeve is arranged at the axis of the sealing disc in a sleeving mode, and a movable column is arranged in the guide sleeve in a sleeving mode. The two ends of the top of the sealing disc are connected with a cover plate through connecting rods, an adjusting screw rod is installed on the cover plate through a screw hole, the bottom of the adjusting screw rod is sleeved with a bearing, a bearing seat is installed at the bottom end of the bearing, and a supporting spring is arranged between the bearing seat and the movable column. The adjustable spherical check valve adjusts the degree of tightness of extrusion on the supporting spring, so that circulation of the valve body is achieved under different liquid pressures, the use requirement for conveying liquid with different concentrations is met, liquid additives or gas can be conveniently and evenly introduced into the conveyed liquid, mixing is achieved, manpower and material resources are saved, and the use effect is improved.

The utility model belongs to the technical field of drive axle assembly, and particularly relates to horizontal C-shaped press-fitting equipment and a press-fitting system for a forklift drive axle. The press-fitting device comprises two press-fitting mechanisms symmetrically arranged on the two sides of a line body rail and a connecting rod used for fixedly connecting the two press-fitting mechanisms. The press-fitting mechanism comprises a rack, an L-shaped press-fitting support installed on the rack in a sliding mode through a horizontal moving sliding table, a gas-liquid pressure cylinder with the fixed end fixedly installed on the L-shaped press-fitting support and a pressure head assembly installed on the L-shaped press-fitting support in a sliding mode through a first sliding assembly. At the initial position, the distances between the corresponding L-shaped press-fitting supports on the two sides of the line body rail and the corresponding drive axle press-fitting positions to be press-fitted in the X-axis direction are different. The two press-fitting mechanisms symmetrically arranged on the machine frame are adopted to form a horizontal C-shaped structure, press-fitting force only acts on the axes, where half-shaft oil seals and oil seal check rings are installed, of the two ends of the drive axle, other parts are not stressed, the service life of press-fitting equipment is guaranteed, and high operation efficiency is achieved.

A liquid cartridge has an outer body composed of at least two wall components and which surrounds a pressure chamber for receiving pressurized gas and pressurized liquid. The liquid cartridge has an outlet opening which penetrates one of the wall components. The liquid cartridge has an outlet valve component held movably or fastened on an inner side of the pressure chamber on at least one wall component, and which, in a closed state, prevents liquid from leaving the pressure chamber through the outlet opening. The outlet valve component can be transferred to an open state by application of force from the outside. For separation of gas and liquid in the pressure chamber, the pressure chamber includes a displaceable or deformable partition wall, which divides the pressure chamber into a gas chamber and a liquid chamber.

The invention discloses an intelligent hysteroscope liquid management system and a fluctuation suppression method thereof, and relates to the technical field of medical equipment liquid management. According to the intelligent hysteroscope liquid management system and the fluctuation suppression method thereof, a liquid fluctuation detection module, a dynamic fluctuation compensation control module and a fluctuation suppression module are arranged, liquid pressure and flow data in a uterine cavity and in an infusion pipeline are collected, frequency domain and time domain analysis technologies are combined, liquid fluctuation characteristics are extracted, and a dynamic characteristic model is established. Based on the fluctuation characteristic model, the liquid fluctuation index is calculated in real time, the flow speed of the infusion pump and the opening degree of the return valve are dynamically adjusted through a self-adaptive control algorithm, and therefore effective compensation and suppression of liquid fluctuation are achieved. Meanwhile, through the flexible damping assembly, high-frequency fluctuation in the liquid transmission process is absorbed on the physical level, and the fluctuation restraining effect is further optimized. The liquid management precision in hysteroscopic surgery can be remarkably improved, surgical operation interference caused by liquid fluctuation is reduced, and the stability of the surgery is guaranteed.

The invention discloses a water jet rock free surface cutting test device under a submerged jet environment, and relates to the field of geotechnical engineering detection.The water jet rock free surface cutting test device comprises a closed experiment bin, a high-pressure water jet system, a pressure servo system and a water pressure sensing device; liquid pressure around a to-be-tested rock block in the closed experiment bin is adjusted through the pressure servo system so as to simulate a submerged jet environment in the actual rock breaking process, the high-pressure water jet system can generate a high-pressure water jet cutter to cut the to-be-tested rock block, and in the process of a water jet rock free surface cutting test in the submerged jet environment, the rock free surface is cut by the high-pressure water jet cutter. By adjusting the moving speed of the water jet nozzle in the high-pressure water jet system, the nozzle moving speed matched with the required grooving depth is obtained, and therefore the problem that the rock breaking and well drilling efficiency is low is solved.

A brake system for a vehicle include first brake devices respectively provided in two vehicle wheels of a vehicle and configured to perform a braking operation by transmitted liquid pressure, second brake devices respectively provided in the other two vehicle wheels of the vehicle and configured to perform a braking operation by an embedded second electromechanical actuator, a reservoir, a master cylinder including a master chamber, and a master piston provided in the master chamber, a hydraulic actuator configured to generate the liquid pressure by an electrical signal outputted in response to a displacement amount of the brake pedal, a hydraulic circuit configured to control the liquid pressure to be transmitted to the first brake device, and an electronic control unit configured to control the first electromechanical actuator, the hydraulic actuator, and the hydraulic circuit so that the first brake device and the second brake device generate braking forces.

The invention discloses an extracorporeal circulation system and a control method thereof, and relates to the technical field of medical instruments. The extracorporeal circulation system comprises a membrane oxygenator, a microembolus filter, a rolling pump, a first pressure detector and a second pressure detector; a liquid inlet of the membrane oxygenator is communicated with the arterial cannula; the microembolus filter is circularly communicated with the membrane oxygenator, and the liquid outlet end of the microembolus filter is communicated with the venous cannula; the rolling pump is circularly communicated with the membrane oxygenator; the first pressure detector is communicated with the rolling pump and is used for detecting the outlet liquid pressure of the rolling pump and generating a first pressure signal; the second pressure detector is communicated with the microplug filter and is used for detecting the inlet liquid pressure of the microplug filter and generating a second pressure signal; the structure of the extracorporeal circulation system and the control method of the extracorporeal circulation system are improved, the accuracy and timeliness of medical staff for judging the oxygenation effect of the membrane type oxygenator are improved, the membrane type oxygenator can be replaced in time, a large number of complications can be avoided, and the death rate of patients is reduced.

The invention discloses a foldable multifunctional anchoring drilling machine, and relates to the technical field of anchoring drilling machines, the foldable multifunctional anchoring drilling machine comprises a mounting rack, the top of the mounting rack is provided with a folding assembly, the folding assembly comprises a sliding block, and the outer surface of the sliding block is provided with an anchoring assembly. According to the foldable multifunctional anchoring drilling machine, in order to facilitate transportation of the anchoring drilling machine, after the anchoring drilling machine is used, a first hydraulic rod is started firstly, a drill bit is driven to move to the position between the outer surfaces of the two clamps, the drill bit is clamped, and then the drill bit is separated under the action of a driving motor; when the multifunctional anchoring drilling machine is used, an arc-shaped rod is moved to the position parallel to a first drilling rod, a plurality of electromagnets are inserted into a limiting groove, a plurality of rotating pipes are moved out of the interior of a second drilling rod through rotation, then the first drilling rod is rotated to the position perpendicular to a mounting frame, and folding of a sliding way and a rotating rod part in the multifunctional anchoring drilling machine is achieved; the problem that in the prior art, an anchoring drilling machine is large in size and inconvenient to transport is solved.

The utility model relates to the technical field of liquid pressure control, and discloses a positive and negative pressure device for plant in-vitro culture, which comprises a gear pump, a liquid storage tank, a bubble remover, an electric control pressure regulating part, a liquid stirring part and a plant fixing part, and the electric control pressure regulating part comprises a first water flow regulating electromagnetic valve, a second water flow regulating electromagnetic valve and a hydraulic pressure gauge. The plant fixing part is provided with a flow guide pipe connecting pipe, a connecting pipe, a metal cable tie A and a metal cable tie B; according to the positive and negative pressure device for plant in-vitro culture, a nutrient solution is stirred through the liquid stirring part, the nutrient solution is conveyed through the gear pump, the water pressure in the flow guide pipe is controlled and adjusted through the electric control pressure adjusting part, and bubbles in the nutrient solution are filtered through the bubble remover. Therefore, the problems that an existing plant in-vitro culture device cannot culture plants with a nutrient solution under the same water pressure in the plants, the survival time of the plants is short, and leaves are prone to withering are solved.

The invention relates to the technical field of low-temperature flexible cable production, and discloses a tension adjusting device and method for a low-temperature flexible cable, and the device comprises a supporting type driving mechanism and a plurality of hydraulic telescoping mechanisms. The longitudinal hollow shell is fixedly installed at the bottom of the n-shaped supporting column, and the interior of the longitudinal hollow shell is of a hollow structure. The longitudinal telescopic rod is placed in the longitudinal hollow shell and can move downwards under the action of liquid pressure. The second rotating wheel is installed under the longitudinal telescopic rod and can move longitudinally along with the longitudinal telescopic rod. According to the tension adjusting device and method for the low-temperature flexible cable, when the cable is paid off, the damping strength of the winding wheel in the rotating process in the paid-off process is controlled, the damping strength can directly act on tension adjustment of the cable, and therefore the effective tension adjusting function on the cable is achieved; according to the device, the relative friction phenomenon of the cable is avoided, so that the damage degree of the cable is reduced.

The utility model discloses a pin shaft press-fitting bearing assembling mechanism which comprises a mounting base, a stand column, a top plate, a ball guide column mold frame, a bottom plate, a pin shaft fixing plate, a clamp spring positioning assembly, a gas-liquid pressure cylinder, a positioning shaft base and a bearing positioning shaft. The ball guide column mold frame is arranged on the mounting base, and the bottom plate is horizontally arranged on a lower mold frame of the ball guide column mold frame; the pin shaft fixing plate is horizontally arranged on the bottom plate, longitudinally-distributed positioning holes are formed in the pin shaft fixing plate, the clamp spring positioning assembly is fixed to the pin shaft fixing plate, the gas-liquid pressure cylinder is longitudinally fixed to the top of the top plate, and the driving end of the gas-liquid pressure cylinder is connected with the top of an upper die frame of the ball guide column die frame. The bottom of the upper die frame is provided with a bearing positioning shaft which is longitudinally distributed through a positioning shaft seat and corresponds to the positioning hole up and down, and the lower portion of the bearing positioning shaft is arranged below the positioning shaft seat in a protruding mode. The press-fitting device effectively reduces labor intensity, improves press-fitting efficiency and guarantees press-fitting quality.