790 results about "Spool valve" patented technology

The utility model discloses a volume ratio slide valve adjusting device, a single-machine two-stage screw compressor and an air conditioning unit. The volume ratio slide valve adjusting device comprises an oil cylinder, an oil piston, a slide valve rod, a slide valve, a loading electromagnetic valve and an unloading electromagnetic valve, wherein the slide valve rod and the slide valve are sequentially connected with one side of the oil piston, and the loading electromagnetic valve and the unloading electromagnetic valve are communicated with the oil cylinder. A spring is arranged between the other side face of the oil piston and the oil cylinder, and the unloading electromagnetic valve enables the oil cylinder to be communicated with the low-pressure stage of the single-machine two-stage screw compressor. The volume ratio slide valve adjusting device is applied to a single-machine two-stage screw compressor, and the size of the high-pressure stage Vi of the compressor can be adjusted in time according to needs, that is, the volume ratio slide valve adjusting device can be adjusted to the position of the minimum Vi under the working condition of a small pressure ratio. And after the compressor is shut down, the compressor can be automatically adjusted to be in a small Vi state, so that unloading starting is facilitated. And meanwhile, the high-pressure stage Vi can be stably and reliably increased, so that the matching of the pressure ratio of the compressor is effectively realized, and the efficiency of the compressor is improved.

The invention discloses an intelligent regulation and control system for heat supply and power saving of a heat pump. The system comprises a heat pump body control optimization module, a heat pump kernel regulation optimization module, a heat source dynamic switching module and a heat supply intelligent power saving module. The invention belongs to the technical field of heat pump power-saving intelligent regulation and control, a variable-capacity compression control module accurately regulates the load of a compressor through variable-capacity control of a bimodal slide valve, and more efficient energy utilization is achieved; the heat pump working condition optimization module adopts a multi-target dynamic optimization algorithm, comprehensively considers factors such as system efficiency, service life and noise, and realizes precise adjustment of working conditions; the multi-heat-source dynamic switching module intelligently selects an optimal heat source and realizes non-inductive switching through a game decision algorithm in combination with heat source entropy efficiency, an equipment health index and energy consumption cost, so that pressure fluctuation and system instability in a heat source switching process are reduced; the working efficiency of the heat pump system is effectively improved, the energy consumption is reduced, and the maintenance cost and the failure rate are reduced.

A hydraulic system according to an embodiment of the present invention comprises: a main hydraulic pump for discharging a hydraulic fluid; a plurality of driving apparatuses operating by receiving the hydraulic fluid; a parallel flow path through which the hydraulic fluid discharged by the main hydraulic pump flows; a plurality of control spools respectively connected to the parallel flow path in parallel to control the supply of hydraulic fluid to the plurality of driving apparatuses; and a plurality of electronic proportional decompression valves for adjusting a pilot pressure, applied to the respective control spools to be proportional to a current signal which has been input, wherein, if the plurality of control spools do not operate, the hydraulic fluid discharged by the main hydraulic pump is drained into an oil tank via the parallel flow path without passing through the plurality of control spools.

The invention discloses an ultralow-temperature cascade refrigeration device, belongs to the technical field of refrigeration devices, and solves the problems that when a low-temperature screw compressor continuously operates below-80 DEG C, organic acid generated by hydrolysis of trace moisture and ester lubricating oil and metal chips form colloidal deposition, the resistance of a slide valve is increased, displacement lag is caused, and the service life of the slide valve is prolonged. However, the sensor only feeds back an instruction signal and cannot be monitored by a control system, and finally bearing wear or energy efficiency reduction is caused. Comprising a screw compressor and a slide valve state monitoring circuit arranged in the screw compressor. The actual displacement of the slide valve is measured in real time through double-frequency laser interference, the thickness of jelly is analyzed in combination with acoustic surface wave frequency shift, the fault index is calculated after dynamic compensation, early warning is conducted when the limit is exceeded, a blind area of a traditional sensor is eliminated, diagnosis is conducted in advance, and compressor bearing abrasion is avoided.

The utility model discloses a hydraulic control system, which relates to the technical field of hydraulic control and comprises an oil tank, a hydraulic pump, a main cylinder, a first electromagnetic plug-in mounting direction valve, a second electromagnetic plug-in mounting direction valve and a third electromagnetic plug-in mounting direction valve. The main oil supply path is communicated with a rapid cavity of the main cylinder through a first electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with a lower cavity of the main cylinder through a second electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with an upper cavity of the main cylinder through a third electromagnetic plug-in mounting direction valve, and the upper cavity, the lower cavity and the rapid cavity of the main cylinder are all communicated with an oil tank through an oil return path; sliding valve control of a conventional hydraulic machine is replaced by cartridge valve control, the hydraulic machine is simple in structure and stable in performance, can be widely applied to the fields of game coins, souvenir medal, medal and the like, brings considerable benefits, and can adjust the drift diameter of corresponding cartridge valve combination parts according to actual conditions so as to improve the application range.

A pneumatic conveying device for conveying granular material, in particular seeds and / or fertilizer, includes at least one blower with at least one outlet, to which the at least one main air supply line is connected, into which flows an air flow generated by the blower. The at least one main air supply line leads into an air inlet of an air distribution device for controlling the volumetric air flow. The air distribution device has an even number of air outlets, to which the respective one connecting line is connected, to which a metering device for supplying the granular material is connected. The air distribution device is embodied as a cylindrical housing with a rotary slide valve arranged therein, which is equipped for changing an outlet cross-section of the air outlets in order to manipulate the supplied volumetric air flow for transporting the granular material coming from the respective metering device.

The utility model discloses a slide valve air tightness detection device, which relates to the technical field of slide valve detection, aims to solve the problem of designing detection equipment for detecting the air tightness of a slide valve by using a bubble method, and comprises a step-shaped detection water tank which comprises a water storage part and a supporting plate, the supporting plate is higher than the water storage part, the supporting plate is provided with a detection port for placing a valve body, the bottom of the detection port is communicated with an air source device, and the detection water tank is provided with a sealing assembly corresponding to the detection port; a drainage assembly is arranged above the water storage part and used for squeezing water in the water storage part to the supporting plate. A water retaining edge is arranged on one side, deviating from the water storage part, of the supporting plate.

The utility model belongs to the technical field of hydraulic valves, and discloses a two-stage buffer overflow valve and a fluid control assembly. The two-stage buffering overflow valve comprises a valve seat assembly, a valve body, a valve element mechanism, an oil passing channel and a buffering piston, the valve seat assembly is provided with an oil inlet, the valve body is arranged at the end, away from the oil inlet, of the valve seat assembly in a sleeving mode, the valve body is provided with an oil outlet, and the valve element mechanism comprises a sliding valve element arranged in the valve seat assembly in a sliding fit mode; the end, away from the oil inlet, of the sliding valve element is provided with a secondary pressure building cavity, the secondary pressure building cavity communicates with the oil inlet, at least part of the oil passing channel is arranged on the sliding valve element and / or the valve seat assembly and / or the valve body, and the oil passing channel communicates with the secondary pressure building cavity and the oil outlet; the buffer piston is arranged on the valve seat assembly in a sliding and sleeving mode and can block or open the oil outlet. By prolonging the completion time of secondary pressure establishment, the buffering effect is improved, and the impact generated when the hydraulic motor is started and braked is reduced.

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.

To improve abrasion resistance while reducing material costs.SOLUTION: A speed control valve 30 is a speed control valve of a die cast machine that controls molten metal injection speed. The speed control valve 30 includes: a housing 35 formed with a valve hole 350 therein; a spool 34 that slides inside the valve hole 350; and a sleeve 36 fixed to the inside of the valve hole 350 and supporting the spool 34 so as to be slidable. The sleeve 36 includes: inside sleeves 361, 362 that contact the spool 34 at at least any position at the time of sliding of the spool 34; and a frame 363 provided so as to surround the periphery of the inside sleeves 361, 362. The inside sleeves 361, 362 and the frame 363 are separate bodies. A material of the inside sleeves 361, 362 has a hardness higher than that of the frame 363.SELECTED DRAWING: Figure 1

An air control valve, including a main valve body, a main valve cavity communicates with an auxiliary air cylinder, an air inlet channel communicates with a train pipe, the air inlet channel communicates with the main valve cavity, and an air exhaust channel communicates with the main valve cavity; a sliding valve, which attaches to the main valve cavity, a communicating channel communicates with the air inlet channel, the communicating channel communicates with the air exhaust channel, a brake inflation channel communicates with the main valve cavity, and the brake inflation channel communicates with a brake cylinder; and a shut-off valve, a shut-off valve body is provided with a shut-off valve cavity, a shut-off valve core is disposed in a driving cavity and separates the driving cavity into an auxiliary air cavity and a brake cavity, the auxiliary air cavity communicates with the auxiliary air cylinder, the brake cavity communicates with the brake cylinder, the air exhaust cavity communicates with the air exhaust channel, and the shut-off valve core has an air outlet position for communicating an air inlet of the air exhaust cavity with an air outlet of the air exhaust cavity and a closing position for separating the air inlet of the air exhaust cavity from the air outlet of the air exhaust cavity.

A display container includes an enclosure having a container body and a lid mounted to the container body for enclosing an interior chamber of the enclosure. The lid has an integrated lens positioned over the interior chamber and a plurality of ports extending through the lid adjacent the lens. The display container further includes a slide valve assembly for selectively opening and closing the ports. The slide valve assembly includes a track fixed relative to the lid in alignment with the ports, and a slide plate slidably received in the track. The slide plate is slidable back and forth along the track between a first position in which the slide plate blocks the ports and a second position in which the ports are unblocked.

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.

The invention belongs to the technical field of slide valve pair zero-zone micro-scale static characteristic testing, and provides a slide valve pair zero-zone micro-scale static characteristic high-precision test bed and a test method.The slide valve pair zero-zone micro-scale static characteristic high-precision test bed comprises an ultra-precision slide valve pair mounting table and a slide valve pair static characteristic hydraulic testing system; by selecting a control element and a detection element which can measure and control the flow, the pressure and the temperature in a high-precision and precise manner, and combining an innovatively developed test subprogram, an intelligent data processing algorithm and a test model machine learning algorithm, the measurement precision, the test result confidence coefficient and the measurement efficiency are improved; according to the test bed, based on a hydraulic test system for the micro-scale static characteristics of the zero region of the slide valve pair, a control element and a detection element which can measure and control the flow, the pressure and the temperature in a high-precision and accurate manner are carefully selected, and the micro-scale static characteristic measurement under different flow, pressure and temperature of the zero region of the slide valve pair can be comprehensively and accurately simulated.

The invention relates to a dual-mode proportional servo valve oriented to multi-axis control and giving consideration to high dynamic and large flow. The dual-mode proportional servo valve comprises a valve body, a valve element, two end covers, two rigidity adjusting mechanisms, two proportional electromagnets, a Hall displacement sensor and a proportional servo controller. The two end covers, the rigidity adjusting mechanism and the proportional electromagnet are symmetrically arranged on the left side and the right side of the valve body, and the middle of the valve element is located in the valve body. The valve element is a non-circumferential opening sliding valve, a left stepped shaft part and a right stepped shaft part are arranged in the middle of the valve element, and a two-stage combined throttling groove with the through-flow area changing in the axial direction is formed in a shaft shoulder of the valve element. Rigidity adjusting mechanisms with adjustable spring rigidity are respectively arranged in the two end covers; the Hall displacement sensor monitors the displacement of the valve core in real time; and the proportional servo controller regulates and controls the output of the proportional servo valve according to the displacement feedback signal. According to the dual-mode proportional servo valve, two working modes of high-frequency fine adjustment and stable large flow are achieved through cooperative regulation and control of the through-flow area and the spring rigidity, and the dual-mode proportional servo valve adapts to various complex working conditions.

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 utility model relates to the technical field of filtration and separation, and discloses a flat microporous membrane gas flux testing device which comprises an aluminum-sprayed iron plate, a gas inlet pipeline is arranged on the left front side of the aluminum-sprayed iron plate, the right end of the gas inlet pipeline is communicated with a gas inlet pneumatic hand slide valve, and a gas purification pressure regulating valve is arranged on the right side of the gas inlet pneumatic hand slide valve. And a first-stage precise pressure regulating valve is arranged on the right side of the gas purification pressure regulating valve. Compared with an existing testing device, the flat microporous membrane gas flux testing device has the following advantages that through mutual cooperation of multiple groups of structures, the device can conveniently and efficiently carry out pressure adjustment or flow adjustment, gas flux testing of a flat microporous membrane under different pressures can be simply and efficiently carried out, and the testing efficiency is improved. The effective test area of the flat microporous membrane clamp is specially designed, calculation can be reduced, and test data can be conveniently, efficiently and accurately obtained.

The invention discloses an engine hydraulic variable valve mechanism, an engine and a method, and solves the problem that in the prior art, a piston and a tappet do not move synchronously, so that the valve closing angle is greatly changed along with the change of the rotating speed when a valve mechanism is partially opened. The hydraulic variable valve mechanism of the engine has the beneficial effect that the closing angle of the valve cannot be advanced along with the change of the rotating angle of the crankshaft at different rotating speeds, according to the specific scheme, an oil drainage hole is formed in the side, close to a piston, of a shell, the piston blocks the oil drainage hole, and the oil drainage hole can be communicated with a piston cavity in the moving process of the piston in the piston cavity; a slide valve is arranged at the oil drainage hole, is arranged between the tappet and the piston through the shell and can be communicated or disconnected with the low-pressure cavity, the control oil way is provided with a power-off normally-closed electromagnetic valve, the power-off normally-closed electromagnetic valve controls the slide valve, when the power-off normally-closed electromagnetic valve is powered off, the slide valve cuts off the high-pressure cavity and the low-pressure cavity, and when the power-off normally-closed electromagnetic valve is powered on, the high-pressure cavity is communicated with the low-pressure cavity. And the air valve is in a partial opening state.

A sleeve includes a first surface treated portion treated with electroless nickel plating at least on both ends in an axial direction, in an inner circumferential surface thereof. The first surface treated portion has an inner diameter smaller than other portions of the inner circumferential surface by a film thickness of first plating, and slidably supports a spool valve element.

A clutch mechanism has a clutch operating member that is rotated by an operation of a clutch lever and is brought into a driving force interruption state. A return mechanism causes the clutch mechanism that has been brought into the driving force interruption state to return to a driving force transmission state. The return mechanism comprises a returning gear that is provided on a motor shaft of an electric motor, a clutch returning rotator that meshes with the returning gear and rotates, and a kick member that is rotatably supported by the clutch operating member, rotates in conjunction with rotation of the clutch operating member to engage with / disengage from the clutch returning rotator, and causes the clutch operating member that has been brought into the driving force interruption state to return to the driving force transmission state. The clutch returning rotator and the kick member are disposed between a spool shaft and the motor shaft.

The utility model belongs to the technical field of hydraulic brake valves, and particularly relates to a hydraulic brake valve with an angle sensor, which comprises a mounting frame, a valve body is fixedly mounted on one side of the mounting frame, a slide valve cavity is arranged in the valve body, an output port communicated with the slide valve cavity is arranged above the valve body, and the angle sensor is arranged in the slide valve cavity. An input port communicated with the sliding valve cavity is formed in the side face, an oil return port communicated with the sliding valve cavity is formed below the sliding valve cavity, a valve element is slidably inserted in the sliding valve cavity, and the input port is formed between the output port and the oil return port; the other face of the mounting frame is movably connected with an operation panel, and a side frame is arranged on one side of the mounting frame. According to the novel automobile lamp, the stable adjusting control effect is achieved, the structure is compact, the braking effect is sensitive, a user can conduct fine adjustment according to needs through the operation panel, meanwhile, the angle sensor is arranged, the application scene that the new energy engineering automobile lamp needs signal feedback is met, and the user can know the adjusting control condition in real time.

The control system comprises a control unit, an oil tank, an oil pump, a heat exchanger, a two-position three-way slide valve, a two-position three-way proportional pressure control slide valve, a switch electromagnetic valve, a proportional electromagnetic valve, a proportional valve and an air source, the air source is respectively connected with the switch electromagnetic valve and the proportional electromagnetic valve, an air outlet of the switch electromagnetic valve is respectively connected with the two-position three-way slide valve and the two-position three-way proportional pressure control slide valve, and an air outlet of the proportional electromagnetic valve is connected with the proportional valve. During working, under the control of the two-position three-way slide valve and the two-position three-way proportional pressure control slide valve, engine oil can quickly enter the brake cavity to quickly generate brake torque, and the proportional electromagnetic valve can control the opening degree of the proportional valve to adjust the flow of the brake engine oil in the brake cavity so as to adjust the brake force. Therefore, the speed changing box has the advantages that the effect taking time of the brake oil cavity is prolonged, engine oil emulsification is prevented, the liquid filling rate is accurately controlled, oil pumping and oil leakage of the speed changing box are prevented, and air loss is reduced.

Switching valve with an actuating lever, the switching valve comprising: a valve body part in which a spool valve is housed in a valve hole communicating with a plurality of ports so as to be movable in an axial direction, and in which a plurality of switching positions, in which the connection states of the plurality of ports are different, can be changed by moving the spool valve; a detent mechanism arranged coaxially with the spool valve and capable of holding the spool valve in any of the plurality of switching positions; and an operating part that releases the position holding by the detent mechanism and allows the spool valve to selectively move to another switching position by a tilting operation of an operating lever, wherein the operating part comprises: a connecting part connected between a distal end of the operating lever in a central axis direction and an end of the valve body part in the axial direction, and converting the tilting of the operating lever into a linear movement along the axial direction; and a locking mechanism that locks the tilting of the operating lever in a state where the spool valve is held in the switching position by the detent mechanism, wherein the locking mechanism comprises: a rod part housed in the operating lever so as to be movable in the direction of the central axis; a pin member provided in the rod part in a direction orthogonal to the direction of the central axis; a plurality of engaging grooves fixedly provided in the valve body part and with which the pin member is detachably engaged according to the plurality of switching positions; a spring member that constantly urges the rod part in a direction in which the pin member is inserted into the engaging groove; and a rod operating part that is operated against the pressure of the spring member to move the rod part in a direction in which the pin member is removed from the engaging groove.

The present invention discloses a clutch oil pressure control system for a transmission, comprising a priority valve, a shift solenoid valve A, a shift solenoid valve B, a shift solenoid valve C, and a control assembly. One end of the priority valve is connected to a main oil pressure regulating valve, and the other end of the priority valve is connected to the control assembly. The shift solenoid valves A, B, and C are connected in parallel, and one end of each of the shift solenoid valves A, B, and C is connected to the main oil pressure regulating valve. The present invention ensures that only one clutch cylinder receives oil in the intersecting oil passages between the reversing spools A, B, and C, while the remaining clutch cylinders drain oil. Even if two or more valve cores become stuck, the transmission will not stop operating. By configuring the lock solenoid valve and the associated oil circuits, the original gear position can be maintained during a power outage, achieving a gear lock function. The shift position can also be returned to neutral during a power outage, achieving a neutral lock function.

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.