408 results about "Spool valve" patented technology

The invention relates to a single-slide-valve type zero-leakage two-way hydraulic lock. The two-way hydraulic lock comprises an end cover, a shell, a valve element I assembly, a valve element II assembly, a first spring, a second spring, a control piston, a plug and a locking nut. The valve element II assembly and the control piston are in dynamic sealing contact with the inner wall of the shell, the valve element I assembly is in dynamic sealing connection with the end cover, and the positions of the valve element II assembly, the control piston and the valve element I assembly are changed, so that the single-slide-valve type zero-leakage two-way hydraulic lock is adjusted to work in a locking state and a two-way circulation state. A miniaturization design concept is adopted, the two sets of hydraulic control one-way valves share one control valve element, oil ways are arranged on part of parts, threaded plug-in type compact structural design is achieved, compared with an existing two-way hydraulic lock connected in a plate mode, the number of product parts and the complex degree of flow channels are effectively reduced, an external connector is simple, and cost is low. And installation and maintenance are convenient.

The invention discloses a screw compressor slide valve adjusting mechanism with an oil-pressure-free unloading function. The screw compressor slide valve adjusting mechanism comprises a flow piston, a volume ratio piston, a volume ratio slide valve, a flow slide valve, a compression spring, a guide rod, a three-position four-way electromagnetic reversing valve, a valve seat, a steering engine and a valve element. The valve element is rotatably installed in the valve seat and driven by the steering engine to rotate, and the valve element is provided with an internal channel structure and can be driven to rotate to different working positions so as to control communication between the oil pipe and the oil cavities, so that the flow of the flow sliding valve and the volume ratio of the volume ratio sliding valve are selectively adjusted. According to the screw compressor slide valve adjusting mechanism with the oil-pressure-free unloading function, an oil pump does not need to provide high oil pressure, the flow load of the compressor can be reduced to the minimum, the compressor gets rid of dependence on the oil pump, unloading is carried out by utilizing downtime, the starting time is shortened, and the structure is more simplified.

A spool valve for a height adjustment seat post for a saddle of a bicycle includes a spool valve housing, a spool valve body positioned within the spool valve housing, and a spool valve sleeve supported by the spool valve housing, with the spool valve body including a radial fluid port and the spool valve sleeve including a fluid port, and the spool valve sleeve fit over the spool valve body and slidable relative to the spool valve housing and the spool valve body to communicate the fluid port of the spool valve sleeve with the radial fluid port of the spool valve body.

A multi-tire inflation / deflation system. The multi-tire inflation / deflation system includes an air compressor, the air compressor configured to take in ambient air and discharge compressed air at a pressure higher than ambient pressure and a power input for the air compressor, where the power input is configured to provided electrical power to the air compressor. The multi-tire inflation / deflation system also includes a control, where the control allows the user to select a desired pressure and an output hose, where the compressed air is output from the air compressor. The multi-tire inflation / deflation system further includes a connector, where the connector allows the output to be connected to an external device and a slide valve, where the slide valve is configured to allow a user to turn off or on the air flow as desired.

The invention discloses a single-feedback closed-loop proportional throttle valve of an integrated amplifier, and relates to the technical field of throttle valve production. An integrated amplifier single-feedback closed-loop proportional throttle valve comprises a main valve, a pilot proportional valve, a displacement sensor and an amplifier, and single-feedback closed-loop control over displacement of a main valve element is formed through a built-in oil way and electric signal feedback. On the basis that a main valve and a pilot proportional valve adopt a threaded plug-in integrated design, an integrated amplifier and a displacement sensor are taken as cores, a single-feedback closed-loop control loop is constructed, a slide valve structure of the pilot proportional valve is matched with precise electromagnetic control, the movement flexibility and clamping stagnation resistance of a valve element are remarkably improved, and the service life of the pilot proportional valve is prolonged. The technical problems that a traditional double-feedback proportional throttle valve is complex in structure and prone to clamping stagnation are effectively solved, accurate proportional throttle control under the high-pressure large-flow working condition is achieved, and the double-feedback proportional throttle valve has the remarkable advantages of being compact in structure, fast in response, high in anti-pollution capacity and high in reliability.

The application discloses a through-layer drilling ring flow supply self-cleaning and blocking integrated hole bottom extraction non-jetting drill tool, which comprises a multifunctional rod body, an extraction inner group pipe, a radial cavity forming nozzle, an axial blocking nozzle, a conical hole screen plate strip, an air inlet transition piece, a cross-border air inlet pipe, a compression spring slide valve assembly and a ring flow opening and closing drill bit. The special slide valve control mechanism is adopted, the original radial cavity forming jet flow is reserved, and the instantaneous axial blocking jet flow is added, so that the conical hole screen plate strip is self-cleaned and blocked. The cross-border air inlet pipe and the transition air inlet piece are combined and sealed, so that the radial air inlet channel passes through the axial flow supply channel without air and water leakage. The ring flow supply anti-backflow opening and closing drill bit is designed, and the jet flow water medium pollution problem and the drill bit opening and closing problem are solved.

A position estimation apparatus includes: a supplying unit that supplies a high-frequency signal Sh to a solenoid for driving a spool of an electromagnetic valve; an acquisition unit that acquires electrical information Je related to the solenoid supplied with the high-frequency signal Sh, and an estimation unit that estimates a position of the spool based on a result of comparison between the electrical information Je acquired by the acquisition unit and the high-frequency signal Sh supplied from the supplying unit.

The application relates to a valve core valve sleeve subassembly necking assembly equipment and an assembly method, and belongs to the field of electromagnetic valve assembly. The equipment comprises a rack, a press-fitting seat, a valve sleeve subassembly feeding mechanism, a valve core subassembly feeding mechanism, an assembly mechanism and a necking mechanism. The press-fitting seat is arranged on the rack. The valve sleeve subassembly feeding mechanism is arranged on the rack and is used for feeding the valve sleeve subassembly. The valve core subassembly feeding mechanism is arranged on the rack and is used for feeding the valve core subassembly. The assembly mechanism is arranged on the rack and is used for press-fitting the valve core subassembly to the valve sleeve subassembly. The necking mechanism is arranged on the rack and is used for necking the valve sleeve subassembly. The application has the effect of improving the precision of press-fitting the valve core subassembly in the valve sleeve subassembly.

This invention discloses a working mode switch for a medical negative pressure regulator, including a valve seat, a slide valve, a sealing gasket, an adjusting component, and an elastic clamping component. The sealing gasket is fixedly mounted on the valve seat, and the slide valve is placed on the sealing gasket and can rotate around the valve seat axis, forming a three-position, five-way torsion planar slide valve structure with the valve seat. The structure has three working positions: closed, adjusting, and straight-through. In addition to the air source port, adjusting port, and straight-through port, it also includes a control port and a vent port. When the three-position, five-way torsion slide valve structure is in the closed position, the control port is closed; when the three-position, five-way torsion slide valve structure is in the open state, the control port connects to the vent port. The closing and venting functions of the control port can be used to externally control the negative pressure generator switch, working in conjunction with it. The adjusting component drives the slide valve, enabling it to rotate within the valve seat and switch between the closed, adjusting, and straight-through working positions. The elastic clamping component is located between the adjusting component and the slide valve, providing elastic clamping force to the slide valve facing the valve seat. This solution enables synchronous operation with medical negative pressure regulators and employs an elastic compression sealing method, offering flexible operation and excellent planar sealing of the slide valve.

The application relates to the technical field of energy station building monitoring, in particular to an energy station building equipment fault monitoring method and system, which comprises the following steps: obtaining operation monitoring data of a screw water chiller in an energy station building, setting a slide valve hot range power-on event and a slide valve cold range power-on event according to the operation monitoring data based on a slide valve stable condition; generating a hot range power-on stroke rate according to the slide valve hot range power-on event and a cold range power-on stroke rate according to the slide valve cold range power-on event; counting an abnormal stroke rate number of the hot range power-on stroke rate being less than or equal to the cold range power-on stroke rate; judging whether the abnormal stroke rate number is greater than or equal to an abnormal number threshold value; and if the judgment is yes, generating a slide valve fault alarm. The application can solve the problems of affecting production and long time consumption caused by fault monitoring after the compressor is stopped and disassembled in the prior art.

A valve device (30) is provided with a cylindrical passage-forming member (40) and a cylindrical spool valve (60) that is slidable with respect to the passage-forming member (40). The passage-forming member (40) has a communication port (56) that communicates the inside and the outside in the radial direction. The slide valve (60) has at least one cut portion (62, 63) cut from one end surface (61) in the axial direction (Rs). The degree of communication of the cutout portions (62, 63) with respect to the communication port (56) can be adjusted by relative displacement of the spool valve (60) with respect to the passage forming member (40).

The present invention provides an automatic stop device that simplifies the structure, improves the responsiveness and reliability of stopping fluid delivery, and enables rapid stopping of fluid delivery in emergencies, as well as a siphon-type fluid delivery pump equipped with this automatic stop device. [Solution] The device includes a float 212 that detects the liquid level in the container to which the liquid is being delivered, and a storage section 213 that houses the float and holds air. A communication hole 214 is opened at the top of the storage section, and the held air is sent to the discharge valve 14 of the pump 1 via an air inlet tube 215. A slide valve 211 that operates in response to the float rising connects the top of the storage section and the air inlet tube via the communication hole when the float rises to a predetermined position. As a result, the discharge valve is closed by the released air, the liquid flow in the discharge hose 15 is restricted, and the liquid delivery of the siphon-type liquid delivery pump is stopped. This provides an automatic stop device 2 and a siphon-type liquid delivery pump having an automatic stop device.

The utility model provides a kind of servo valve flow channel and servo valve, including valve core and valve sleeve;The servo valve flow channel includes the passage being set in the valve body inside servo valve, including inlet flow channel, oil return flow channel, first actuating port flow channel, second actuating port flow channel;Two cavities are arranged in the position of the length direction of the two ends of valve body inside close to valve sleeve, the valve body inside is also provided with balance passage, balance passage is used to connect the two cavities inside valve body, oil liquid in one cavity can flow to another cavity by balance passage when valve core is translated in valve sleeve;Utilize such a kind of servo valve flow channel and servo valve, by setting cavity and balance passage as control oil cavity and control channel in the two ends of valve sleeve, the pressure fluctuation when spool moves is reduced to controllable range, to balance two sides oil pressure, reduce rigid impact and valve core resistance.

A spool valve assembly operable for automatic control of oil flow includes: a housing; a spool valve configured to slide axially within the housing; a first inlet port on the housing configured to connect to a first oil passage, wherein the first oil passage is operable as an outlet of a first oil control valve; a second inlet port on the housing configured to connect to a second oil passage, wherein the second oil passage is operable as an outlet of a second oil control valve; a valve core outlet on the housing configured to connect to a third oil passage; and a return spring configured to return the spool valve to a rest position.

The invention discloses a high-temperature friction testing device for a hydraulic slide valve. The device is composed of a valve element clamping module, a valve body mounting module, a vertical force applying module, a high-temperature heating module and a friction force applying module. The valve element clamping module is composed of a valve element, a valve element centering fixing column, a valve element fixing clamp, a valve element mounting rod and a mounting rod fixing shell. The valve body mounting module consists of an oil storage tank, an oil storage tank fixing plate and a valve body; the vertical force applying module comprises X, Y and Z three-axis guide rails driven by a motor, and pressure and friction force sensors; the high-temperature heating module surrounds the whole valve body and the valve core mounting part; the friction force applying module is driven by a motor to drive the oil storage tank to achieve axial movement of the valve body, and relative friction between the valve element and the valve body is achieved. The device can carry out friction tests of the hydraulic slide valve at different temperatures, realizes friction wear simulation of the hydraulic slide valve under multiple working conditions of oil environment, high temperature, pollution and the like, and provides data support for wear and degradation tests of the hydraulic slide valve.

The invention relates to a slide element (1) for a damper valve (10), wherein the slide element (1) has a control section (2) configured to extend displaceably in a control channel (11) of the damper valve (10) transversely to a flow direction (S) of a damping medium in order to adjust a flow cross-section of the damper valve (10), wherein the slide element (1) has a mounting section (3) arranged on a side of the slide element (1) opposite the control section (2), wherein the mounting section (3) can be attached to an actuating means (12) of the damper valve (10) for displacing the slide element (1) in a direction transverse to the flow direction (S), and wherein a connecting section (4) is formed between the control section (2) and the mounting section (3).which has a lower stiffness against deformation in the flow direction (S) than the control section (2) and the fastening section (3).

The invention relates to the technical field of aircraft anti-skid brake control systems, in particular to a stop valve for a brake system of a high-pressure system aircraft, which comprises a valve casing, a slide valve and an electromagnetic valve assembly are arranged in the valve casing, and the slide valve comprises a valve sleeve and a reset assembly; an end cover is arranged at one end of the valve shell; the valve sleeve is arranged in the valve shell, a valve element is movably arranged in the valve sleeve, an oil inlet cavity is formed between the valve element and the oil inlet, a control cavity hole and an output cavity hole are formed in the valve sleeve, and the control cavity hole is used for being communicated with an output channel of the electromagnetic valve assembly through a control oil way arranged on the valve shell. The output cavity hole is used for supplying oil to a brake servo valve of a brake system through an output oil way arranged on the valve shell when the output cavity hole communicates with the oil inlet cavity, and a second seal and a third seal are arranged on the periphery of the valve sleeve. The reset assembly is arranged between the valve element and the end face of the end cover. The length of the slide valve is reduced, so that the structure is more compact; and the reliability of the stop valve in a high-pressure system airplane brake system is improved.

This invention discloses a constant flow pressure reducing valve, relating to the field of hydraulic valve technology. It includes a valve seat with an oil outlet, an oil inlet, and a drain port arranged sequentially from right to left. An elastic pressure regulating component is located at the left end of the valve seat, and a spool valve core is abutted at the right end of the elastic pressure regulating component. An axially movable elastic flow control valve core is located at the right end of the spool valve core. A drain channel communicating with the inner cavity of the valve seat is opened at the left end of the spool valve core, and the drain channel is connected to the drain port. The valve core slides within the valve seat, allowing oil to flow out from the drain port to relieve pressure. An oil inlet channel communicating with the oil inlet is located at the right end of the spool valve core, and a throttling channel communicating with both the oil inlet and outlet is provided on the elastic flow control valve core. The movement of the elastic flow control valve core within the valve seat maintains a constant pressure difference between the throttling channel and the oil inlet channel, thereby achieving a constant output flow rate. This constant flow pressure reducing valve achieves pressure reduction in the oil circuit and a constant output flow rate, facilitating processing and disassembly, and simplifying the hydraulic circuit.

The invention relates to a recyclable squeezing bridge plug which comprises a central pipe, a lower connector, a first connecting sleeve and a lock cap which are connected in sequence. The rotary joint, the coupling, the oil pipe and the round head guide shoe are connected in sequence; the sliding valve, the ball seat, the lining, the blocking ball capable of being fixed to the ball seat and the setting assembly arranged on the central pipe are arranged on the base; the slide valve is provided with a first channel, and the side wall of the lower joint is provided with a second channel which can be communicated with the first channel; the lining is connected with the ball seat through a rivet, a third channel is arranged on the side wall of the lining, a fourth channel is arranged on the side wall of the ball seat, and when the rivet is not broken, the third channel is communicated with the fourth channel. According to the scheme, after the cement paste is directly injected into the bottom of the well body through the third channel and the fourth channel, the cement paste circulates upwards, the problem that cement escapes outwards along a well body leakage layer when the well is sealed by cement is avoided, the cement paste can fully fill a target area of the well body, and the conditions that the stratum is blocked and the permeability is too high are avoided.

Slide valve (V3) comprising a valve element (111) and a cylinder (112) with a bore (112a) that accommodates the valve element (111) to be movable in an axial direction, and designed such that when the valve element (111) moves in an initial position in the axial direction relative to the cylinder (112), a supply valve port (Vi) formed between the valve element (111) and the cylinder (112) opens, thereby introducing a working fluid from a hydraulic pressure source (31) through the supply valve port (Vi) into a hydraulic chamber, wherein a throttle section (O3) is provided in a fluid channel formed between the supply valve port (Vi) and the hydraulic pressure source (31), or in a fluid channel formed between the supply valve port (Vi) and the hydraulic chamber, wherein the throttle section (O3) is designed such that the area of ​​an opening formed between the valve element (111) and the cylinder (112) is constant in a throttle effectiveness range extending from the initial position to a position where the magnitude of an axial movement of the valve element (111) from the initial position becomes equal to a predetermined value, and the area of ​​the opening increases in a throttle ineffective range where the magnitude of an axial movement of the valve element (111) exceeds the predetermined value. characterized by the fact that the throttle section (O3) is provided at a position axially offset by a predetermined amount from one end of a wall surface of the bore (112a) of the cylinder (112), the end of which forms the feed valve port (Vi); wherein the throttle section (O3) is formed by an outer circumferential surface of the valve element (111) and a cylindrical projection (112e1) having a predetermined thickness and extending along the entire circumference of an inner end of a connecting hole (112e) formed in the cylinder (112) and communicating with the bore (112a) of the cylinder (112) at its inner end; and wherein a recess (112g) is formed between the cylindrical projection (112e1) and the end of the wall surface of the bore (112a) of the cylinder (112), the end of which forms the feed valve port (Vi), and the connecting hole (112e) and the cylindrical projection (112e1) are formed by a tube (P) which is fluid-tightly joined to the cylinder (112).

To provide a fluid pressure control circuit capable of improving fuel consumption performance while improving responsiveness to an operation input, and a work machine including the same.SOLUTION: A controller 35 has a function of controlling a confluence valve 31 to an open position on the basis of detection of a standby state in which a spool valve 14 is in a non-operation state from an idling state in which a plurality of hydraulic pumps 12 are activated, controlling any one of bypass valves 27 to the open position, controlling the remaining other bypass valves 27 to a closed position, controlling a discharge flow rate of any one of the hydraulic pumps 12 to a required flow rate for generating a standby pressure, and controlling the discharge flow rate of the remaining other hydraulic pumps 12 to the required flow rate or less.SELECTED DRAWING: Figure 1

The present application relates to a kind of on-off flow combined steam regulating valve device, including steam chamber, valve seat, oil cylinder connecting body, piston valve rod connecting device, main oil motor piston, intermediate oil motor spool, tension spring, top rod, lower shell, tension spring rod, main oil motor spring, valve rod, the steam chamber, oil cylinder connecting body and lower shell are all connected by bolt, the valve rod is connected together with main oil motor piston by piston valve rod connecting device, the main oil motor piston is connected intermediate oil motor spool, intermediate oil motor spool is connected tension spring rod by top rod and tension spring.The device of the present application is small in size, compact structure, easy to replace installation as a whole, steam regulating valve valve, main oil motor and intermediate oil motor are integrated together, which can be applied to small ship turbine in the equipment space requirement more demanding.

The invention discloses a pneumatic measurement system for slide valve core edge processing quality detection, and the system comprises a pneumatic measurement module which collects the pneumatic measurement data of the slide valve core edge, and transmits the data to a data processing and analysis module; the optical measurement module performs optical measurement on the size and the surface quality of the edge of the valve core of the slide valve and transmits optical measurement data to the data processing and analyzing module; the motion control module controls a pneumatic measuring head of the pneumatic measuring module to move along the axial direction of the spool of the slide valve so as to ensure that the pneumatic measuring head performs full-coverage scanning on the edge of the spool of the slide valve in the detection process; and fusing pneumatic measurement data, optical measurement data and motion control data, and carrying out defect identification and quality evaluation based on a deep learning algorithm. According to the technical scheme, pneumatic measurement and optical measurement are combined, high-precision detection of the edges of the valve element of the sliding valve is achieved, and the problem that the measurement precision is insufficient in a complex environment is solved by fusing multi-modal data.

The present application provides a kind of fluid valve, fluid system, construction machinery and control method. The independent regulating valve (2) of the present application is provided with valve body (3) and outlet regulating spool (15). Valve body (3) has: each discharge port (D1), (D2), which is connected with any one of each port (Rp), (Hp) arranged to hydraulic cylinder (113) driven by working oil;And each tank port (T1), (T2) is connected with each discharge flow path (135), (136). Outlet regulating spool (15) makes stem port (Rp) only communicate with cover port (Hp), or makes stem port (Rp) only communicate with the (2) tank port (T2), or makes stem port (Rp) communicate with cover port (Hp) and the (2) tank port (T2).

The invention relates to a window (20) designed for a housing of an actuator for automation technology for actuating a valve fitting, such as a valve or a slide valve, in a media line, such as a pipeline, the window comprising: a support ring (21) made of a metallic material, in particular a corrosion-resistant material, having an inner surface (21.1) and an outer surface (21.2); and a transparent glass element (22) which is cast into the support ring and completely fills a cross-sectional area of the support ring.

The invention relates to a method for controlling a longitudinal slide valve (1) with an electromagnetically controlled longitudinal slide (2) actuated by a spring force, which is movable back and forth between two end positions (5, 7) defined by mechanical stops and at least one intermediate position (6). To improve the actuation of the longitudinal slide valve (1), the longitudinal slide (2) is actuated with a decaying superimposed oscillation when its intermediate position (6) is actuated in such a way that the longitudinal slide (2) is specifically stimulated to additional movements which serve to bring the longitudinal slide (2) quickly and precisely into its intermediate position (6) when there is an occurrence of frictional forces between moving and stationary valve components which are undesirable in themselves.

The invention provides a slide valve device, and relates to the technical field of railway vehicle air braking. Comprising a sliding valve seat and a valve sleeve, the sliding valve seat comprises a first sealing piece and a seat body, and the first sealing piece is in sealing connection with one side of the seat body; a sliding groove is formed in the inner hole wall of the valve sleeve, a second sealing piece is arranged on the bottom face of the sliding groove in a sealed mode, the side, away from the base body, of the first sealing piece can be attached to the side face of the second sealing piece, a first valve port set is arranged on the first sealing piece, and a second valve port set corresponding to the first valve port set is arranged on the second sealing piece in a penetrating mode. A gas path group is arranged in the seat body in a penetrating manner; the first valve port group is communicated with the gas path group; the first sealing piece and the second sealing piece are made of high-strength wear-resistant materials. Due to the fact that the first sealing piece and the second sealing piece are large in hardness and excellent in abrasion resistance, foreign matter is not prone to abrading the first sealing piece and the second sealing piece, the sealing performance between the first sealing piece and the second sealing piece is guaranteed, and the service life of the sliding valve device is prolonged by more than ten times.

The invention discloses a control system of a double-pressure cylinder gas circuit and a photoetching machine, the control system comprises a first solenoid valve, a second solenoid valve, a first pressure reducing valve, a second pressure reducing valve, a first control valve and a pushing cylinder, the first control valve is a two-position three-way control slide valve; the control slide valve comprises a first input interface, a second input interface, an output interface and a pneumatic control interface, a lower end air outlet of the first electromagnetic valve is connected with an air inlet end of the first pressure reducing valve, and an air outlet end of the first pressure reducing valve is connected with the first input interface and the pneumatic control interface of the first control valve; a lower-end air outlet of the second electromagnetic valve is connected with an air inlet end of a second pressure reducing valve, an air outlet end of the second pressure reducing valve is connected with a second input interface of the first control valve, and an output interface of the first control valve is connected with a first vent of the pushing cylinder. Through cooperation of the electromagnetic valve and the control valve, precise air cylinder action adjustment can be achieved, the cost is effectively reduced, and the economic benefits are remarkably improved on the premise that the machining precision is guaranteed.