36 results about "Hydraulic seal" patented technology

The invention relates to the technical field of underground water recharging, and particularly discloses a deep foundation pit underground water pumping and recharging balanced vacuum pressure type recharging device which comprises a basic hardware system, a sealing isolation system, a dynamic regulation and control system and a monitoring feedback system. The sealing isolation system comprises a vacuum well lid; according to the pipeline sealing assembly, a hydraulic drive sealing ring is arranged at the joint of a dewatering well water outlet pipe and a recharge well water inlet pipe, the sealing ring automatically expands to fill gaps during water injection, and air permeation is thoroughly isolated; through triple air isolation formed by water pumping pipe head immersion, vacuum well lid sealing and hydraulic sealing rings, contact between underground water and air is reduced to the maximum extent, oxidation reaction is reduced from the source, and the precipitation amount of iron and manganese oxides is reduced by 60% or above; meanwhile, bubbles and sediments can be effectively removed, more than 90% of bubbles and sediments can be actively removed through a periodic back raising and silt pumping mechanism, the anti-blocking performance of the recharge well is remarkably improved, and therefore the service life of the recharge well is prolonged.

The utility model discloses a hydraulic sealing plug, including sealing cap and plug, the sealing cap one end is with the sealing end cap of sealing, the other end is open, the inside cavity is cylindrical, and the outside is polygon, the plug is located the inside cavity of sealing cap, and is fixed in sealing end cap inboard middle part, and the plug includes the straight plug of upper portion and the reducing plug of lower portion, the reducing plug outer wall is surrounded and is provided with the screw thread, the straight plug and the reducing plug junction are equipped with the sealing ring, the sealing ring is equipped with between the sealing ring of sealing end cap below and the plug of sealing cap inner wall, simple structure, convenient to use, have good sealing performance, and have longer life.

A magnetic coupling assembly incorporating a sleeve having longitudinal and oppositely longitudinal ends; a first hydraulic seal fixedly attached to the sleeve, and being positioned at the sleeve's longitudinal end; a second hydraulic seal fixedly attached to the sleeve, and being positioned at the sleeve's oppositely longitudinal end; a plurality of magnets fixedly attached to the sleeve and positioned between the first and second hydraulic seals; the sleeve including longitudinal and an oppositely longitudinal segments; and incorporating first and second wiper rings, fixedly attached to the sleeve, the first wiper ring being positioned longitudinally from the first hydraulic seal, and the second wiper ring being positioned oppositely longitudinally from the second hydraulic seal; the sleeve forming a lubricant reservoir which is outwardly closed by the sleeve, the lubricant reservoir being longitudinally closed by the first hydraulic seal and oppositely longitudinally closed by the second hydraulic seal.

The utility model discloses a hydraulic sealing joint which comprises a main body, a joint pipe installed on the main body, an input pipe installed on the left side of the joint pipe, a fixing nut installed on the input pipe, a limiting ring installed on the input pipe, a first sealing ring installed on the right side of the limiting ring, and a second sealing ring installed on the right side of the first sealing ring. A third sealing ring is installed on the right side of the second sealing ring. According to the hydraulic sealing connector, the connection mode of the conical connector is adopted, and connection can be more stable through the connection mode. The three sealing rings are arranged on the connector, the perfect sealing effect can be achieved through the three sealing rings, and the service life of the connector can be prolonged. The limiting ring is arranged on the input pipe, it can be ensured that the fixing nut cannot be disengaged from the input pipe due to the existence of the limiting ring, a certain pulling force can be provided during connection operation, and therefore connection is tighter.

The invention discloses a high-pressure high-speed hydraulic sealing test device, and belongs to the technical field of hydraulic sealing test. The test platform comprises a driving motor, a diaphragm coupling, a hydraulic sealing test section, a sealing water inlet pipeline, a pressure water inlet pipeline, a sealing water return pipeline and the like, a closed water circulation loop is formed, and the stable regulation and control of the sealing performance can be realized. The platform design has the characteristics of high power (up to 110 kW), high pressure (up to 1.5 MPa) and high rotating speed (up to 3500 rev / min). The platform adopts an integrated design concept, the assembly precision and stability of the device are improved, the pressure boundary condition is monitored and adjusted in real time through the cooperation of the pressure sensor, the pressure supply pump and the electric control valve, and the flowing stability of each pipeline in the test process is ensured.

The invention relates to the technical field of hydraulic elements, in particular to an assembling and positioning device for a high-precision hydraulic element. The invention discloses a precise assembling and positioning device for a high-precision hydraulic element. The precise assembling and positioning device comprises a barrel body and a cylinder body which are connected; the cylinder body comprises a cylinder body and cylinder body preassembly positioning sensor which is embedded in the bottom of the cylinder body and corresponds to the cylinder body and cylinder body preassembly center position, a one-way pressure release valve fixed to one side of the bottom of the cylinder body, and a hydraulic sealing detection sensor embedded in the side wall of the cylinder body. On one hand, the hydraulic element assembling control module accurately controls preassembling and assembling of the barrel and the cylinder body, accurate assembling of hydraulic elements by workers is facilitated, and reusability of the hydraulic elements is guaranteed; and on the other hand, the barrel body and the cylinder body in the hydraulic element are accurately matched, so that the problems of repeated assembly, assembly errors and influence on the assembly precision are avoided, and the product performance and quality of the hydraulic element are greatly improved.

An optimized metallic thermal spray coating able to achieve a suitable surface finish such that it slides against a hydraulic seal without damaging the surface of the hydraulic seal or causing hydraulic fluid to leak between the two sliding surfaces. The optimized metallic thermal spray coating can achieve a surface finish which has a combination of roughness characteristics consisting of an arithmetical mean roughness, a maximum profile peak height, a mean roughness depth designated, skewness, and a roughness relative material ratio, each of which is within well-defined upper limits and / or ranges.

According to the invention, a dual fuel injector for injecting two separate fuels into a combustion chamber of an internal combustion engine is provided. A dual fuel injector includes a nozzle body housing a first fuel needle and a second fuel needle. The dual fuel injector also includes a first fuel control chamber defined at least in part by an upper end of the first fuel needle such that varying a first pressure in the first fuel control chamber varies a force on the upper end of the first fuel needle. Further, the dual fuel injector includes a second fuel control chamber defined at least in part by an upper end of the second fuel needle such that varying a second pressure in the second fuel control chamber varies a force on the upper end of the second fuel needle. The dual fuel injector includes a first fuel control valve defining a first switching volume fluidly coupled to a first fuel control chamber for actuating a first fuel needle valve; and a second fuel control valve defining a second switching volume fluidly coupled to the second fuel control chamber for actuating the second fuel needle valve. The dual fuel injector also includes an annular hydraulically sealed passage extending around an outer surface of the first fuel needle. The annular hydraulic seal passage is fluidly coupled to a high pressure fluid source. In addition, an annular hydraulic seal passage is fluidly coupled to at least one of the first switching volume and / or the second switching volume such that the respective switching volume is fluidly coupled to a high pressure fluid source via the seal passage.

The utility model discloses a hydraulic charging bucket sealing device for a submerged arc furnace, which comprises a charging bucket, a cover plate is rotatably mounted on the charging bucket, an n-shaped lifting lug is welded on the surface of the cover plate, the n-shaped lifting lug is connected with a connector, the connector is rotatably connected with a lifter, and the lifter controls the connector to move up and down to be connected with the n-shaped lifting lug. The lifter is rotationally connected with a hoisting mechanism, and the hoisting mechanism is used for hanging the lifter; after the hook head is connected with the n-shaped lifting lug in a hanging mode, the air cylinder controls the hook head to move upwards so that the cover plate can be opened, the cover plate can be actively opened and closed by controlling movement of the air cylinder and the connecting component, hooking and unhooking operation can be smoothly completed, and semi-automatic production can be achieved. A safe distance is reserved between the charging bucket cover plate and the charging bucket screen, it can be guaranteed that sufficient positions exist when the charging bucket is overfilled with discharging under the clamping and blocking conditions in the discharging process, lowering and sealing of the cover plate are not affected, and the fault rate of the discharging cover plate and smoke overflow are effectively reduced.

This invention discloses a non-contact hydraulic sealing device based on the hydrodynamic effect of spiral grooves, aiming to solve the problem of dry friction damage between the spiral groove surface and the smooth surface of the stationary ring during the start-up and shutdown phases of pump equipment. The device includes a rotating ring, a stationary ring, a secondary ring, and a locking mechanism. During initial startup, the secondary ring rotates under the viscous shear force of the rotating ring, effectively transferring mechanical friction to a preset wear-resistant surface, protecting the core spiral groove from high temperature and wear. When the rotational speed reaches a preset threshold, the locking mechanism is hydraulically or electromagnetically driven, braking through a piston and locking block, causing the secondary ring to transition from a rotating state to a stationary locked state. At this time, a momentary speed jump occurs between the rotating ring and the secondary ring, guiding the spiral groove to quickly establish a high-rigidity liquid film, achieving stable and reliable non-contact operation. This invention, by introducing a secondary ring and coordinating with locking and braking control, achieves friction transfer, protects the core working surface, and achieves a protective effect on the core hydraulic sealing structure.

This invention belongs to the field of shock absorber technology and relates to a large-size wellbore axial shock absorber, including an upper connector, a housing, and a lower connector. The housing is fitted onto the outer wall of the upper connector, and a receiving cavity is formed between the inner wall of the housing and the outer wall of the upper connector. A disc spring shock absorber assembly is installed in the receiving cavity. A hydraulic shock absorber assembly is connected to the bottom of the housing, and the lower connector is connected to the bottom of the hydraulic shock absorber assembly. The hydraulic shock absorber assembly includes a hydraulic shell, a piston, and a hydraulic sealing seat. The hydraulic shell is fitted onto the bottom of the housing, and the hydraulic sealing seat communicates with the bottom of the hydraulic shell and forms a hydraulic cavity inside. The piston slides through the hydraulic sealing seat and is slidably disposed in the hydraulic cavity. The piston has a hydraulic through hole, and an electromagnetic proportional valve is connected to the hydraulic through hole. This invention improves the problem of existing technology's single shock absorber element and fixed parameters, which are difficult to adapt to the vibration characteristics of large-size wellbores, by combining disc spring and hydraulic shock absorption, adaptive stiffness of shape memory alloy adjustment plate, and active adjustment by electromagnetic proportional valve.

The utility model discloses a low-leakage hydraulic valve group sealing assembly, and relates to the technical field of hydraulic sealing. The device comprises a hydraulic valve bank, a connecting mechanism and a plurality of configuration mechanisms are arranged on the hydraulic valve bank, and the connecting mechanism comprises a connector fixedly connected to the right side of the hydraulic valve bank. Through the arrangement of the connecting mechanism, if a sealing ring needs to be replaced, a first manual rotating disc on the outer wall of a first screw rod can be rotated outwards to move outwards, so that limiting on a T-shaped block on the first screw rod is relieved, at the moment, the T-shaped block drives a rotating block and a limiting rod on the rotating block to move outwards under the pushing of a first spring on the outer wall of a sliding rod, and the sealing ring is replaced. When the rotating block moves to a proper position, the rotating block can be rotated towards the two sides, so that the limiting rod on the rotating block can release limiting of the connecting pipe and the connector, the connecting pipe and the connector are further separated, the sealing ring is convenient to replace, through the design, tedious steps in the traditional mounting and dismounting process can be simplified, and the mounting efficiency is effectively improved.

The application discloses a kind of self-adapting air pressure balance sliding door control systems, it is related to sliding door control technical field.The sensor layer, PID control module, execution layer and prediction maintenance module are included;Sensor layer gathers pressure difference, sealed pressure, vibration, door position, temperature and humidity and other data, PID control module uses the improved algorithm with nonlinear correction and output amplitude limiting, the pressure difference is stabilized at 2Pa target value, simultaneously through closed loop PID, hydraulic sealed pressure is stabilized at 1.0MPa, and anti-integral saturation and output amplitude limiting are configured to ensure operation safety;Execution layer includes servo motor drive sliding door, hydraulic sealing system, emergency pressure relief valve and audible and visual alarm device;Prediction maintenance module is based on random forest regression model, according to the characteristics such as sealed pressure drop rate, valve response time, motor current variance, vibration level, operation frequency, remaining service life is predicted, and maintenance suggestion is output according to critical, early warning, normal classification.

The invention discloses a brake caliper maintenance method which comprises the following steps: S1, placing a brake caliper to be maintained in an operation area, disassembling and decomposing the brake caliper by using a tool assembly, and shooting the disassembling and decomposing process of the brake caliper through an image acquisition module; s2, the decomposed brake caliper parts are put into an ultrasonic cleaning machine to be cleaned; s3, the cleaned brake caliper parts are transferred into a drying device to be dried; s4, the dried brake calipers are assembled in an operation area, the assembling process is shot through an image acquisition module, and the assembled brake calipers are installed on a hydraulic sealing detection tool; s5, a corresponding brake caliper type is selected through a software interface of the control system, and sealing performance test parameters are set; s6, starting the hydraulic sealing detection tool, carrying out a pressurization test on the brake caliper, and shooting the test process through an image acquisition module; s7, the control system collects and displays test data in real time, and automatically generates a test result report after the test is completed; and S8, judging whether the sealing performance of the brake calipers is qualified or not according to the test result report.

The application discloses a hydraulic sealing machine for gas spring production and relates to the technical field of hydraulic sealing.The clamping mechanism is arranged in a vertically formed through hole, and the stamping mechanism is arranged above the through hole, so that the device can vertically fix the gas spring pre-assembly in the through hole, the distance between the cylinder port and the pressure head of different specifications and lengths is kept constant, the accurate and stable stamping and sealing operation of the gas spring is performed from top to bottom, the position and height of the pressure head do not need to be frequently adjusted, the stability of the hydraulic sealing is guaranteed, the production efficiency is improved, meanwhile, the swingable swing arm is rotatably arranged below the first roller, the first gear and the second gear are meshed and reversed, so that the cylinder can be secondarily clamped from the side surface after being subjected to the stamping force from the top, and the stability of the device in the process of the hydraulic sealing of the gas spring is guaranteed to a certain extent.

The invention discloses a universal hydraulic sealing element reliability test platform, system and method, and the test platform comprises a hydraulic pump station which is connected with a hydraulic machine through a hydraulic pipeline, and the hydraulic pump station is provided with a first pressure adjustment unit, a first flow adjustment unit and a temperature adjustment unit. And the display and control console is respectively connected with the hydraulic pump station, the hydraulic machine and the hydraulic pipeline through cables, and the display and control console is provided with a stroke control unit, a temperature control unit, a pressure control unit and a speed control unit. And a displacement sensor is arranged on a piston rod of the hydraulic machine. And the hydraulic pipeline is connected with the hydraulic pump station and the hydraulic machine, and a second pressure adjusting unit and a second flow adjusting unit are arranged on the hydraulic pipeline. According to the invention, the reliability test problem of hydraulic sealing elements with series sizes under multiple factors such as oil medium, movement speed, environment temperature, oil pressure and large stroke is solved, and the reliability of the hydraulic sealing elements under different factor conditions can be effectively tested.

The invention relates to the technical field of oil exploitation downhole tools, in particular to a spherical gyro shock absorber, and aims to solve the technical problems that the shock absorption effect is reduced and the equipment performance is damaged due to the fact that a spring and a sealing piece are aged because the spherical gyro shock absorber is difficult to adapt to a complex downhole environment in the prior art. The spherical gyroscope shock absorber comprises a shell and a shock absorption component, wherein the shock absorption component comprises a spherical gyroscope and a gravity adjusting assembly. The spherical gyroscope is rotationally connected to the gravity adjusting assembly. The pumped drilling fluid can drive the spherical gyroscope to rotate along a fixed axis. According to the spherical gyroscope shock absorber, the vibration effect is counteracted through the fixed shaft stability generated when the spherical gyroscope rotates at a high speed, quick-wear parts such as mechanical springs or hydraulic sealing parts are not used, and the risk that the shock absorption performance is damaged due to the fact that the parts are aged and fail when used in the underground environment is avoided. The technical problems that due to the fact that an existing shock absorber is difficult to adapt to the complex underground environment, a spring and a sealing piece are aged, the shock absorption effect is reduced, and then the equipment performance is damaged are solved.

The application discloses a kind of ultra-high pressure reciprocating water hydraulic seal comprehensive test bench and friction measurement method, belong to rubber reciprocating seal technical field.Test bench mainly includes driving mechanism, stress sensor, plunger, eccentric shaft, experimental valve block and hydraulic power source, driving mechanism controls plunger reciprocating motion in experimental valve block, stress sensor gathers the resistance signal of plunger movement, eccentric shaft can be adjusted eccentricity by adjusting screw on experimental valve block;Experimental valve block mainly includes main valve body, auxiliary valve body, end cover, valve sleeve, test seal and the like, main valve body is equipped with flow passage and pressure input port, test seal is installed on valve sleeve.The application can measure the inner and outer stroke friction of single seal, the friction of double-side pressure seal, the leakage rate of plunger rod double-side pressure reciprocating seal under different eccentricity and the leakage rate of ultra-high pressure gap seal, and provide experimental basis for the comprehensive performance research of reciprocating water hydraulic seal.

This invention provides a microscopic leakage observation device for hydraulic seals, comprising: a housing (1), a base (2), a screw plug (3), an oil nozzle (4), a first oil passage (5), a seal (6), a second oil passage (9), a transparent sheet (10), and an optical amplifier; the seal (6) is located in a sealing groove at the bottom of the housing (1); the transparent sheet (10) is disposed in the base (2), located directly below the sealing groove at the bottom of the housing (1); a through hole is provided at the bottom of the base (2) as a microscopic leakage observation hole for the contact area between the seal (6) and the transparent sheet (10); the optical amplifier is used to magnify and display the microscopic structure of the contact area between the seal (6) and the transparent sheet (10) within the microscopic leakage observation hole. This invention can detect minute leaks occurring in the sealing structure.

The application discloses a hydraulic sealing joint, comprising a sealing core and a locking piece, wherein the sealing core comprises a main body part, a guide part and a hard sealing part, the diameter of the main body part is larger than that of the guide part, the main body part and the guide part are connected through the hard sealing part, the side surface of the hard sealing part is extended from the side surface edge of the main body part to the side surface edge of the guide part, the guide part is a cylinder and is matched with a middle sink hole of a female joint part, the side surface of the hard sealing part is matched with an outer interface of the female joint part, and the locking piece is sleeved on the sealing core and is used for being fixed with the outer surface of the female joint part. The hydraulic sealing joint adopting the above technical scheme is easy to assemble, has better sealing effect and stable sealing structure.

The utility model discloses a hydraulic unblocking packer, which relates to the technical field of oil and gas exploitation equipment, and comprises a packing component, an outer sheath, a transportation component and a pipeline transportation component, the inner wall of the outer sheath is fixedly provided with a hydraulic sealing piece, the surface of the outer sheath is provided with a storage groove, and the pipeline transportation piece is arranged in the packing component. A feeding piece is fixed to the top of the pipeline conveying piece, and a fracturing jetting piece is fixed to the surface of the pipeline conveying piece. The device has the advantages that through cooperation of the second feeding pipe, the hollow pipe, the oil and gas conveying pipe, the annular spraying pipe and the pressurizing spraying head, the fluid conveying purity and the working efficiency are remarkably improved, the problems of cross contamination and conveying disorder are effectively solved, the chemical stability of different media is guaranteed, and the working efficiency is improved. And meanwhile, efficient flow dividing control in a limited space is achieved, and the safety of oil and gas exploitation and the process reliability are greatly improved.

The invention relates to the technical field of pipeline sealing, in particular to a prestress self-compensation hydraulic sealing concrete pipe connector which comprises a hydraulic cavity structure and a fractal meshing structure which are arranged at a bell mouth, and the hydraulic cavity structure comprises a plurality of micro cavities which are annularly arranged and filled with non-Newtonian fluid. The adjacent micro cavities are connected through an interconnection channel, the fractal occlusion structure is provided with a plurality of grooves which are annularly arranged and used for containing the micro cavities, partition plates between the adjacent grooves are provided with receding holes for the interconnection channel to pass through, each micro cavity comprises a pressure change cavity and a pressure bearing cavity, the interconnection channel comprises a capillary network, and the hydraulic cavity structure is provided with an elastic polymer film. The non-Newtonian fluid is carboxymethyl cellulose-based shear thickening fluid, and a clamping ring made of a shape memory material is arranged at a clamping groove in the inner wall of the avoiding hole. The technical effects that prestress self-compensation hydraulic sealing is achieved, and the sealing performance and reliability of the concrete pipe connector are effectively improved are achieved.

A rotary actuator includes a manifold block and a rotor assembly including a rotor shaft and a plurality of arcuate pistons attached to the rotor shaft, each arcuate piston curved at a set radial distance from the rotor shaft and each piston attached to the rotor shaft via a crank arm. A pressure chamber assembly coupled to the manifold block defines a plurality of piston pressure chambers receiving and at least partially surrounding each arcuate piston, including a plurality of gland seals disposed adjacent an inlet of each piston pressure chamber to create a seal between an inner surface of the pressure chamber and an outer surface of the arcuate piston. Each gland seal includes an inner seal engaging a piston surface of the arcuate piston and a plurality of outer seals engaging an inner surface of the piston pressure chamber, thereby forming a hydraulic seal.

The present application relates to a kind of impact device and its control method and engineering machinery and its operation method, belong to the technical field of impact operation machinery such as impact breaking hammer, rock drilling, pile driving, deep-sea pile driving, dynamic compaction, metal forming etc..The existing problems of impact device, such as cylinder piston easy to be damaged, hydraulic impact of emptying, piston and cylinder wear and tear, etc.are solved.The main fixed connecting seat for connecting carrier, ram, hydraulic cylinder and ram guide part connected with the main fixed connecting seat are included, the cylinder body of hydraulic cylinder is connected with the main fixed connecting seat, and the piston of hydraulic cylinder is slidingly installed in the cylinder body;Ram is located outside the cylinder body, ram guide part is used for axially guiding and radially limiting ram, piston rod is used for driving ram to do axial reciprocating impact motion along ram guide part, and ram does not bear the hydraulic seal of hydraulic cylinder.The present application is used for impact breaking hammer, rock drilling, pile driving, deep-sea pile driving, dynamic compaction and metal forming etc.impact operation.

The invention provides an autonomous leveling system and method for an underwater base platform. The autonomous leveling system for the underwater base platform comprises a hydraulic control module, hydraulic telescopic supporting legs, an inertial navigation module and an autonomous leveling master control module. The hydraulic control module comprises a hydraulic sealed cabin and an external pressure compensation device, the hydraulic telescopic supporting legs are provided with displacement and pressure sensors, the inertial navigation module feeds back platform attitude data, and the autonomous leveling master control module achieves data interaction and instruction issuing through an industrial personal computer and a switch. According to the method, a platform coordinate system is established, front and back coordinate changes of the base are combined, the expansion amount of the supporting legs is calculated through a rotation translation matrix, and the state estimation precision is improved through adaptive robust control until the platform meets the angle, pressure and stability conditions. According to the invention, autonomous leveling of the unmanned underwater vehicle recovery platform under different working conditions can be realized, and stable docking of the unmanned underwater vehicle is ensured.

A universal closure device for drain plugs for washbasins, bidets, bathtubs, showers and kitchen sinks, the universal closure device comprising: an opening and closing mechanism having a hollow central body adapted to be secured to an associated drain plug; and a hollow accommodating body coaxial with the central body and axially movable in a vertical direction relative to the central body by means of a bouncing device to stably turn from an open or raised configuration to a closed or lowered configuration; an adapter mechanically connected to the containment body of the opening and closing mechanism and externally equipped with an annular gasket configured to form a hydraulic seal against an inner peripheral edge of a drain plug of an associated washbowl, bidet, bathtub, shower and kitchen sink in a closed configuration. The device also includes a cap that is removably associated with the adapter and is located on a side opposite the opening and closing mechanism to form a top cover for the adapter.

The utility model discloses a multi-stage sealing hydraulic sealing element which comprises a multi-stage sealing outer base ring, an inner attaching sealing ring is embedded in the middle of the inner side of the multi-stage sealing outer base ring, a supporting inner ring is embedded in the middle of the interior of the multi-stage sealing outer base ring, and an outer attaching sealing ring is embedded in the middle of the outer side of the multi-stage sealing outer base ring. According to the multi-stage sealing structure, the multi-stage sealing outer base ring, the inner attaching sealing ring and the outer attaching sealing ring are arranged, the multi-stage sealing outer base ring serves as a main body frame, the inner attaching sealing ring and the outer attaching sealing ring conduct sealing from the inner side and the outer side respectively, multiple sealing defensive lines are formed, and the sealing effect is good. The multi-stage sealing structure is simpler and lower in cost, and the inner attaching sealing ring and the outer attaching sealing ring can be conveniently replaced.

The present application relates to the well logging fishing is used closed fishing device, especially relates to a kind of injection well closed fishing wellhead device.The device includes wellhead sealing locking gate, variable-diameter positioning fishing short circuit and hydraulic sealing short circuit;Wellhead sealing locking gate includes main body, sealing clamping elastic gate, gate hand wheel;The upper end of main body is connected to blowout preventer, and its lower end is connected to hydraulic sealing short circuit;Variable-diameter positioning fishing short circuit includes heavy rod connector, variable-diameter positioning short circuit, fishing head;Heavy rod connector connects variable-diameter positioning short circuit;Variable-diameter positioning short circuit can be detachably connected to fishing head;Hydraulic sealing short circuit includes: steel sleeve, rubber tube, pressurizing connector, first piston, second piston and spring;Injection well closed fishing wellhead device provided by the present application maximizes the success rate of fishing, meets the requirements of safety and environmental protection standards, realizes the goal of zero overflow and zero pollution on site.

The invention relates to the technical field of oil gas well oil production engineering, in particular to a hydraulic sealing anchoring packer for a horizontal well and a control system of the hydraulic sealing anchoring packer, and the hydraulic sealing anchoring packer for the horizontal well comprises a central pipe, a sealing assembly, an anchoring assembly and a pressure relief assembly. When the center pipe slides in the axial direction of the center pipe, the pressure relief assembly can control the high-pressure state or the low-pressure state of the oil supply area. By arranging the control system, when the pressure relief assembly enables the oil supply area to be in a high-pressure state, high-pressure hydraulic oil drives the sealing assembly to work, and the control system is in linkage to drive the anchoring assembly to work; when the pressure relief assembly places the oil supply area in a low pressure state, the control system is used for ensuring that the reset of the sealing assembly is prior to the reset of the anchoring assembly. Thus, stable resetting of the anchoring assembly is achieved while ensuring that wear of the sealing assembly is reduced.

The application relates to the technical field of butterfly valves, in particular to a manual butterfly valve with a hydraulic sealing structure, which comprises a butterfly valve body, a fluid channel in the butterfly valve body is blocked by cooperation of a hard ring body and a butterfly plate rotatable in the hard ring body, the hard ring body is fixed on the inner wall of the fluid channel of the butterfly valve body, a valve rod is arranged in the butterfly valve body to drive the butterfly plate to rotate, the butterfly plate comprises a disc-shaped butterfly plate eccentrically fixed on one side of the valve rod, a soft ring plate and a hard ring cylinder movably sleeved outside the disc-shaped butterfly plate, a door disc arranged on the disc-shaped butterfly plate and facing the fluid, a core rod axially movable at the position of the axis in the valve rod and a pressure-changing ring arranged on the disc-shaped butterfly plate and facing away from the fluid, the hard ring cylinder moves, the hard ring cylinder and the disc-shaped butterfly plate cooperate to clamp the soft ring plate, the soft ring plate is gradually flattened, the contact pressure between the periphery of the soft ring plate and the hard ring body is increased, and the hydraulic sealing performance of the butterfly valve is improved.