39results about How to "Realize holding pressure" patented technology

The invention provides an in-situ preserving coring system and method, and belongs to the field of in-situ mechanical research of rock masses. The coring system comprises a coring drilling tool and rock core preserving equipment, the coring drilling tool comprises a drill bit and a drilling tool body connected with the drill bit, a pressure testing device is arranged on the portion, close to the drill bit, of the side wall of one end of the drilling tool body, and a temperature testing device and a humidity testing device are arranged above the pressure testing device; the rock core preserving equipment comprises an equipment body, a core storage tube capable of freely sliding in the equipment body in the axial direction is arranged in the equipment body, the core storage tube is a hollow cavity and is used for storing rock cores subjected to drilling, the outer wall of the equipment body is provided with a pressure preserving device, a heat preserving device and a humidity preserving device which are connected with the core storage tube respectively, and a ball valve connected with the front end of the equipment body is further included. The ball valve is switched on, rock core drilling is conducted, the drilled rock cores gradually enter the core storage tube along with drilling of the coring drilling tool, after rock core drilling is completed, the ball valve is switched off, and the drilled rock cores are stored in the sealed core storage tube. The in-situ preserving coring system and method are suitable for mechanical property research of the rock masses.

A waste heat recovery steam cabinet comprises a cabinet body and a cavity inside the cabinet body. An intake pipe is arranged on one side of the cabinet body, an exhaust pipe is arranged on the other side of the cabinet body, the intake pipe and the exhaust pipe are respectively communicated with the cavity, the intake pipe is communicated with a steam generator, the exhaust pipe penetrates the inside of a heat exchange water tank, and the inside of the heat exchange water tank is communicated with the steam generator through a water pump and a water inlet pipe. By the aid of a waste steam recovery device, most exhausted waste steam is recovered by a condenser of the water tank to realize heat exchange, emission of the waste steam can be decreased, a water supply water tank can exchange heat, energy is saved, environments are protected, normal work of the steam cabinet cannot be affected, and the pressure of the steam cabinet can be maintained. The waste heat recovery steam cabinet can be in a safe working state for a long time, normal work is ensured, and the steam cabinet is stable and reliable in usability, ingenious in design, excellent in performance, convenient and practical.

The invention relates to well logging equipment, in particular to density calibrating equipment provided with an automatic hydraulic telescoping ram for calibrating a density instrument. The density calibrating equipment comprises the hydraulic telescoping ram and a density calibrator module, wherein the hydraulic telescoping ram comprises a hydraulic cylinder, a motor, a hydraulic gear pump driven by the motor, an oil tank and an energy accumulator; and the oil tank is connected into the hydraulic gear pump which is connected with the hydraulic cylinder, and the energy accumulator is connected into the hydraulic gear pump. In order to solve the technical problems of the prior density calibrating equipment, the invention provides the density calibrating equipment which is provided with the automatic hydraulic telescoping ram, has good fidelity and a controllable pressurizing process, and can achieve pressure maintaining.

The invention belongs to the technical field of deep sea sampling devices, and discloses a deep sea pressure compensation-type sampling device based on double-piston self-adaptive pressure balance. The deep sea pressure compensation-type sampling device comprises a deep water pump assembly, a first two-position three-way electromagnetic valve connected with the deep water pump assembly, a sampling barrel connected with the first two-position three-way electromagnetic valve, and a second two-position three-way electromagnetic valve, a valve block assembly and an energy accumulator which are connected with the other end of the sampling barrel, wherein the sampling barrel comprises a sealed cabin barrel, a front piston rod capable of moving inside the sealed cabin barrel, a return spring for pushing or limiting movement of the front piston rod, a marine organism filtering membrane assembly and a back piston rod incapable of moving inside the sealed cabin barrel; through holes are formed in the centers of the front piston rod and the back piston rod. Through adoption of the technical scheme, the deep sea pressure compensation-type sampling device can achieve in-situ, concentrated and pressure-maintained sampling of deep sea organisms.

The invention relates to a fast multi-direction multifunctional liquid control valve which comprises a valve element, a valve body and a valve seat. The valve element is disposed in the inner cavity of the valve body. The valve seat is fixed at the upper end of the valve body. A differential hole allowing the upper and lower ends of the valve element to generate differential pressure is formed in the valve element. A control hole is formed in the valve seat. The differential hole, the upper cavity of the valve element and the control hole are communicated. When a hydraulic valve opens, hydraulic oil in a main oil channel passes the differential hole, the upper cavity of the valve element and the control hole to form an oil channel; when the control hole is closed, the valve element moves under the action of the high-pressure hydraulic oil of the upper cavity of the valve element, and the liquid control valve is closed. The liquid control valve provided with the differential hole is fast and flexible in response, and pressure maintaining can be achieved.

The invention discloses a coring device and a coring method. The coring device comprises an upper connecting buckle, a coring outer cylinder and a coring drill bit which are sequentially connected, a connecting buckle inner hole of the upper connecting buckle, an inner hole of the coring outer cylinder and a drill bit inner hole of the coring drill bit are communicated to form a first shaft hole, a detachable valve, a slidable differential lifting rod and a coring inner cylinder connected with the valve and the differential lifting rod are arranged in the first shaft hole, a coring hole of the coring drill bit is communicated with the coring inner cylinder through the valve, the differential lifting rod is further connected with a lifting mechanism, and the lifting mechanism can drive the differential lifting rod and the coring inner cylinder to be away from the valve by a certain distance and close the valve. The coring method comprises the step that a sealing ball is put in to enable the lifting mechanism to drive the differential lifting rod to ascend. According to the coring device and the coring method, the valve is closed after a rock core is far away from the valve for a certain distance, so that the problem that the valve is blocked by the rock core is avoided, and the reliability of heat-preservation and pressure-maintaining coring is improved.

The sea water hydraulic electrically controlled one-way valve includes: sea water electromagnet with magnetic core barrel connected with holed end cap and no-hole end cap separately on two ends; magnetic core tube assembly with armature push rod extending beyond the assembly; winding assembly outside the magnetic core tube assembly and with casing, end cap and sealing rings; one-way valve with valve body, which has oil port A, throttle hole, valve core and jump ring, oil port B and oil hole; and armature push rod capable of contacting with the small end of the valve core. The present invention may be used as common one-way valve and can realize back flow under control of signal.

A detachable ERCP-specific multifunctional biliary stone extraction balloon, which relates to the technical field of medical appliances, including a tube body, a joint and a balloon; a first balloon cavity, a first guide wire cavity and a first Injection cavity, the second balloon cavity, the second guide wire cavity and the second injection cavity are arranged in the second tube; one end of the first tube is provided with a first connector; one end of the second tube is provided with a second connector, The second connecting piece is connected with a hollow balloon column, a hollow guide wire column and a hollow injection column, an airflow inlet and an airflow outlet are arranged on the balloon column, and a one-way valve is connected in the balloon column; the second connecting piece and the first A connector is detachably connected. After the connection, the first balloon cavity, the first guide wire cavity, and the first injection cavity are arranged in one-to-one correspondence with the one-way valve, the guide wire post, and the injection post. The invention not only has the function of taking stones by the common biliary tract stone removal balloon, but also can be used as a guiding device, which reduces the risk of ERCP operation and improves the work efficiency.

The invention relates to an elevator sliding guide shoe liner made of ultra-high molecular weight polyethylene and a preparation method for the elevator sliding guide shoe liner. The shoe liner comprises a product B and two products A oppositely arranged on the product B in the length direction of the product B, and the product B and the two products A are combined to form a structure adaptive to an elevator sliding guide shoe in shape. The products A and the product B are prepared from ultra-high molecular weight polyethylene resin or composite materials with ultra-high molecular weight polyethylene resin as the base body through the injection molding process, the mass fraction of the ultra-high molecular weight polyethylene resin in the composite materials is 45%-75%, and the rest is low molecular weight polyolefine resin. Compared with the prior art, the elevator sliding guide shoe liner is made of the ultra-high molecular weight polyethylene composite materials for the first time, and the application of the ultra-high molecular weight polyethylene composite materials to special-shaped products is achieved through the characteristics of superior mechanical properties of high strength and wear resistance, superior chemical corrosion resistance and superior ageing resistance of the ultra-high molecular weight polyethylene.

The invention discloses a calibrator for a hydraulic bolt tensioning jack. The calibrator comprises a testing tool, a protection unit, an ultrahigh-pressure oil source and a control unit; the testingtool comprises a top cover, a supporting part, a base, a working force sensor, a testing bolt mounting support and a testing bolt, wherein the top cover, the supporting part and the base form a closedshell, the working force sensor is fixed on the base, the testing bolt mounting support is fixed to the top end of the working force sensor, a threaded hole is arranged in the testing bolt mounting support, the central axis of the threaded hole is coaxial with the central axis of the working force sensor, and the testing bolt is a double-head bolt with threads at the two ends, one end of the testing bolt penetrates through the top cover to be screwed into the threaded hole of the testing bolt installation support, and the other end of the testing bolt is in threaded connection with a piston of the hydraulic bolt tensioning jack, the cylinder body of the hydraulic cylinder of the hydraulic bolt tensioning jack is seated on the upper surface of the top cover, and the protection unit is fixed on the top cover. According to the instrument, various specifications calibration and even large-load bolt tensioning jack calibration can be realized.

The invention relates to a high-temperature gas cooled reactor helium compressor isolation pressure maintaining overhaul method and device, and belongs to the technical field of reactor equipment sealing and overhaul. When a reactor runs normally, a spiral lifting overhaul device in the overhaul device is arranged in helium atmosphere at the upper part of a pressure vessel. When maintenance is needed, a helium compressor is lowered to a lower limit position through the overhaul device, a pressure maintaining overhaul isolation valve is closed, a loop pressure boundary is reconstructed, and a to-be-maintained part is isolated outside for overhaul; after overhauling is completed, the overhauled helium compressor is jacked through the spiral lifting overhaul device and abuts against the uppersealing face to achieve pretightening force, and sealing is achieved; the spiral lifting overhaul device is driven by a motor and a speed reducer and is lifted along guide rails which are uniformly distributed on the inner wall and have a self-locking function; and a jacket cooling system exchanges heat with the metal wall surface of the equipment, cools the environment in the equipment, maintains a local low-temperature helium environment, and prevents insulation overtemperature failure of a helium compressor stator winding and failure of a gear motor.

The invention discloses copper part forging equipment and method. The copper part forging equipment and method have the characteristics of high forging efficiency and good forming quality. The technical scheme is characterized in that the equipment comprises a multi-directional die forging hydraulic device and a hydraulic driving system; the multi-directional die forging hydraulic device comprisesa rack, a lower die, an upper die, a top stamping cylinder, a rear side stamping cylinder, a left side stamping cylinder and a right side stamping cylinder, a rear lifting pin, a left lifting pin anda right lifting pin are further arranged between the upper die and the lower die, the lower die is fixed to the rack, the top stamping cylinder is fixed to the rack and used for driving the upper dieto ascend and descend, the rear side stamping cylinder is fixed to the rack and used for driving the rear lifting pin to stretch out and draw back, the left side stamping cylinder is fixed to the rack and used for driving the left lifting pin to stretch out and draw back, and the right side stamping cylinder is fixed to the rack and used for driving the right lifting pin to stretch out and draw back; and the hydraulic driving system is used for controlling the operation states of the top stamping cylinder, the rear side stamping cylinder, the left side stamping cylinder and the right side stamping cylinder. The copper part forging equipment and method are applicable to the technical field of forging.

The invention relates to a rotary multi-way valve with pressure maintaining and shock preventing functions, and belongs to the technical field of fluid reversing valves. The technical problems that for an existing valve, a pressure maintaining function can not be achieved, operation is tedious, and misoperation is liable to be caused are solved. According to the technical scheme, the rotary multi-way valve with the pressure maintaining and shock preventing functions comprises a valve body, a valve element, a front end cover, a back end cover and a safety valve assembly and further comprises a valve element positioning sheet, a reset spring, a fastening screw and a spring base; a valve element hole is formed in the center of the valve body, a P-cavity annular groove is formed in the middle of the valve element hole, a T-cavity annular groove is formed in the end, close to the back end cover, of the valve element hole, the P-cavity annular groove communicates with an oil inlet, and the T-cavity annular groove communicates with an oil return inlet; the valve element is arranged in the valve element hole and can rotate around the axis of the valve element and axially move; two groups of inclined fluid working channels and two groups of parallel vertical fluid working channels are formed in the axial cross section of the valve body.

The invention relates to a cartridge valve for lifting equipment. The cartridge valve for lifting equipment is characterized by comprising a magnetic conductive sleeve assembly, a push rod, a coil, avalve body, a first valve sleeve, a cone valve element, a spring seat, a first spring, a valve seat, a throttling sheet, a second valve sleeve, a one-way valve element and a second spring. A third oilport is formed in the valve body, and a first oil port and a second oil port are formed in the second valve seat; the cone valve element is matched with a valve hole in the first valve sleeve to control on and off of the first oil port and the second oil port; the one-way valve element is matched with the valve seat to control on and off of the first oil port and the second oil port. The cartridge valve of an inserted design is compact in structure and low in processing cost, and can be used for ascending and descending pressure lifting equipment and stopping pressurizing control.

The electrically controlled one-way valve consists of electromagnet and one-way valve, and the one-way valve includes valve body, valve core and jump ring. The valve body has oil port A on one side, axial through hole, middle throttle hole, stepped valve core with small end fitting the throttle hole, jump ring and oil port B. The electromagnet push rod mounted inside axial through hole in the valve body can contact with the small end of the valve core. The present invention can realize the pressure maintaining one-way valve function and reverse motion under the control of electric signal.

The invention discloses a pneumatic soft mechanical arm, and belongs to the technical field of mechanical arms. The soft mechanical arm is composed of a multi-joint rigid-flexible coupling structure, a rigid body of each joint is composed of a light sandwich structure, and a flexible body is composed of four soft driving rods and soft connecting seats thereof; the rigid body part is embedded in the connecting seat and is fixed with the flexible connecting seat through a metal fastening ring; and the rigid-flexible coupled structure enables the arm to have the characteristic of high toughness.

The invention discloses an energetic powder material automatic press fitting device and method based on servo pressurization, and the device part comprises a pressure head, an igniter shell, an energetic powder material, a positioning mold, a pressure head dismounting station, a pressurization station, a pressure head assembling station, a manipulator, a conveying belt, a positioning carrier, a servo press, a jacking air cylinder, an intercepting air cylinder and a second manipulator. The automatic press-fitting device is used for replacing manual operation for press-fitting of the energetic powder material, man-machine isolation can be achieved, and the problem of automatic press-fitting of the energetic powder material of the aerospace initiating explosive device is solved.

The invention belongs to the technical field of automobiles, and discloses a hydraulic braking system and a hydraulic braking control method. The hydraulic braking system comprises a liquid storage reservoir, a brake wheel cylinder mechanism, a liquid outlet control mechanism, a hydraulic braking cylinder, a brake pedal, a booster cylinder and a liquid inlet control mechanism, wherein the liquid storage reservoir is used for storing a brake fluid; the brake wheel cylinder mechanism selectively communicates with the liquid storage reservoir through the liquid outlet control mechanism; the hydraulic braking cylinder communicates with the liquid storage reservoir, and a brake piston is arranged in the hydraulic braking cylinder in a sliding mode; the brake pedal is connected to the brake piston through a push rod; the booster cylinder communicates with the liquid storage reservoir, and a booster piston is arranged in the booster cylinder in the sliding mode; and one end of the liquid inlet control mechanism selectively communicates with the hydraulic braking cylinder and the booster cylinder, and the other end of the liquid inlet control mechanism selectively communicates with the brake wheel cylinder mechanism. According to the hydraulic braking system, the boost braking function of an electric boost braking system can be realized, and the function of a vehicle body stabilizing system can also be realized, so that the boost braking function and the vehicle body stabilizing control function are integrated, and the user experience is increased.

The invention provides a gas circuit contact. The gas circuit contact comprises a gas circuit plug pin and a gas circuit plug hole, through inner holes are formed in the gas circuit plug pin and the gas circuit plug hole correspondingly, and the inner hole of the gas circuit plug hole is provided with a valve body, a sealing body, a valve seat and a reset spring, wherein the valve body is connected with the valve seat through threads, the sealing body is arranged between the valve body and the valve seat, the sealing body is attached to the inner hole wall of the gas circuit plug hole, one endof the reset spring makes contact with the valve seat, the other end of the reset spring is fixed, a plurality of sealing grooves are formed in the right end of the gas circuit plug pin at intervals,and sealing rings are arranged in the sealing grooves. The invention further provides an electrical connector provided with the gas circuit contact. According to the gas circuit contact, after the gas circuit plug pin and the gas circuit plug hole are separated, a gas circuit channel can be closed automatically, and the functions of pressure maintaining, dust preventing, foreign matter blocking and the like on a gas circuit can be achieved; and meanwhile, the sectional area of the gas circuit is large, more gas media can be transferred, more heat is brought away in the same time, and the function of cooling protection is achieved for a system with the large heating quantity.

The invention belongs to the technical field of coil shaping of shell type electric reactors and relates to an intelligent control method and system for an oil press. According to the technical scheme, the system comprises an oil press pressing table (1), a touch screen (2), a control console (3), a PLC (4) and a pressure sensor (5). The touch screen is arranged on the control console, the PLC is arranged in the control console, the oil press pressing table is provided with the pressure sensor, the pressure sensor is connected with the PLC, and the PLC is connected with the touch screen and the control console. The intelligent control system for the oil press improves accuracy and safety of pressure control of the oil press, stage type pressurizing, pressure maintaining and decompressing functions can be achieved in the pressurizing process of the oil press, and the pressing and shaping process of a shell type transformer coil is optimized. The intelligent control system for the oil press has the advantages that pressure control errors are less, the control safety factor is high, the automatic pressurizing, pressure maintaining and decompressing functions can be achieved, various protection functions are complete, and the operation process is safe, convenient, fast and humanized.