193 results about "Vacuum switch" patented technology

The invention relates to the technical field of power transmission and distribution switches, and discloses a vacuum bypass switch, which comprises an insulating shell, a static end copper bar, a movable end copper bar, a vacuum switch tube, an insulator, a pull rod and a permanent magnetic mechanism, the pull rod is driven by a magnetic field generated by the permanent magnet assembly to drive the moving end copper bar to move in the direction away from the vacuum switch tube so as to realize opening. The first coil and / or the second coil generate / generates a target magnetic field opposite to the magnetic field generated by the permanent magnet assembly in direction under the power-on effect so as to drive the pull rod to drive the movable end copper bar to move towards the vacuum switch tube, and closing is achieved. Closing is achieved through the first coil and / or the second coil, the problem that closing cannot be achieved due to single-coil faults is avoided, and the problem of thermal runaway caused by continuous energization of the single coil is solved. The invention also discloses a bypass switch control system, which controls the energization of the first coil and the second coil through the first energizing loop and the second energizing loop respectively to ensure the reliable closing of the vacuum bypass switch.

The utility model discloses a vacuum integrated module mechanism of a condensate bead packaging machine, which comprises a roller mould and a support seat, the roller mould comprises a turntable and a mould plate fixed on the outer circumference of the turntable, and vent holes are arranged on the turntable at one end of the roller mould along the center circumference array. Each vent hole is connected with the corresponding mold plate through an exhaust pipe; a vacuum switching assembly is mounted on the supporting seat on one side of the roller mold, the vacuum switching assembly comprises a vacuum switching block, a first arc-shaped groove and a second arc-shaped groove are formed in the vacuum switching block, the vacuum switching block is attached to the section of the rotary table, and the first arc-shaped groove and the second arc-shaped groove are opposite to the vent hole; and the second arc-shaped groove is communicated with external air. The first arc-shaped groove and the second arc-shaped groove which are formed in the vacuum switching block are matched with the vent holes in the rotating disc, so that the vacuum states of the mold plates at different positions are conveniently controlled, and different actions of the mold plates at different positions are conveniently realized.

The invention discloses a multi-port direct current change-over switch based on a controllable negative voltage source, and belongs to the technical field of power equipment. Comprising X (X = 5 or 3) main branches, a commutation branch and X groups of controllable conduction switches, each main branch is composed of a through-flow vacuum switch, and the commutation branch is composed of a controllable negative voltage source and a square wave resonance direct current circuit breaker which are connected in series. The five main branches of the sending end are connected with a sending end positive pole rectifier and the like, and the three main branches of the receiving end are connected with a receiving end positive pole rectifier and the like and are all connected with the commutation branch through a controllable conduction switch. The controllable negative voltage source is formed by connecting a double-thyristor branch circuit and a negative voltage source in parallel, and the square wave resonance direct current circuit breaker comprises a temporary through-flow branch circuit and the like. The vacuum switch is used for replacing an SF6 switch, so that the switch is good in environmental protection property; the converter branch and the lightning arrester are shared, so that the use of high-price equipment is reduced, and the cost is reduced; a controllable square wave voltage source is utilized to excite high-frequency oscillation of an LC branch, and the element size is reduced; and rapid transfer of current in different directions can be realized, and the system response speed is improved.

The invention discloses a suspension air supply module helium detection test system and method, and relates to the technical field of automobile part detection, and the system comprises a helium detection airtight cabin which is used for accommodating a suspension air supply module to be detected and forming a closed test environment; the nitrogen pre-detection module is connected with the helium detection airtight cabin and is used for pre-filling nitrogen to detect macroscopic leakage; the helium supply module is connected with the helium detection airtight cabin and used for filling helium with set pressure into the suspension air supply module; the vacuum pump is connected with the helium detection airtight cabin through a vacuum switching valve and is used for vacuumizing the helium detection airtight cabin to a preset vacuum degree; the helium detection mass spectrometer is configured to detect the helium leakage rate in the helium detection airtight cabin; and the helium recovery device is connected with the helium detection airtight cabin and is used for recovering residual helium after the test is completed. According to the scheme, the adaptability limitation of a traditional helium detection technology on a complex non-standard structure can be broken through, and the detection sensitivity and the detection efficiency of tiny leakage are improved.

The invention relates to a vacuum switch circuit breaker. The vacuum switch circuit breaker comprises a protective shell and a supporting shell, the double-tube vacuum bag is positioned in the shell and comprises a vacuum arc extinguish chamber and a vacuum insulation chamber; wherein the vacuum arc-extinguishing chamber comprises a static conducting rod and a movable conducting rod, the static conducting rod comprises a first penetrating end and a first contact end, the first penetrating end penetrates through one end of the vacuum arc-extinguishing chamber, the movable conducting rod comprises a second penetrating end and a second contact end, and the second penetrating end penetrates through the other end of the vacuum arc-extinguishing chamber and extends to the vacuum insulation chamber; the first contact end of the static conducting rod and the second contact end of the movable conducting rod are oppositely arranged and are spaced by a distance; the vacuum insulation chamber comprises an insulation push rod, one end of the insulation push rod penetrates through the other end of the vacuum insulation chamber, and the other end of the insulation push rod is connected with the second penetrating end of the movable conducting rod; and the transmission and control mechanism is connected with one end of the insulating push rod. By arranging the vacuum insulation chamber, the insulation push rod is packaged, and the insulation performance is better.

The invention relates to a magnetic field contact for a vacuum arc extinguish chamber and a manufacturing method of the magnetic field contact, and belongs to the technical field of vacuum switchs.The magnetic field contact comprises a contact cup, a contact and reinforcing ribs, the contact covers an opening of the contact cup and is fixedly connected with the contact cup, a spiral groove is formed in the circumferential outer wall of the contact cup, and the reinforcing ribs are arranged in the spiral groove. The spiral groove is used for forming a longitudinal or transverse magnetic field, the reinforcing rib is located in the contact cup and fixedly connected with the inner wall of the contact cup, and the outer diameter of the reinforcing rib is the same as the inner diameter of the contact cup where the reinforcing rib is located. The manufacturing process of the contact structure is reduced, and the use amount of silver-copper solder and contact materials is reduced.

According to the mechanical direct-current circuit breaker based on the variable inductor and the method, in the circuit breaker, a switch branch comprises a vacuum switch VB and a current sensor which are connected in series; the reverse injection branch is connected in parallel to the two ends of the vacuum switch VB, comprises a pre-charging capacitor, a discharging thyristor, a multi-stage series inductor and a parallel thyristor module, and is selectively connected in series with the multi-stage series inductor according to the detected fault current so as to realize variable inductance; a reverse injection current is formed to realize current zero passage and arc quenching of the VB fracture of the vacuum switch; the energy consumption branch is connected in parallel to two ends of the vacuum switch VB and is used for dissipating residual energy in the loop after the mechanical direct current circuit breaker is switched off; the controller is connected with the current sensor and the thyristors and used for judging the number of inductors needing to be input according to the rise rate and amplitude of fault current and controlling the corresponding thyristors to be switched on, and graded inductor series-in and reverse current injection of the multi-stage series inductors of the variable inductor are achieved.

The invention relates to a switch closing holding device and a vacuum switch. The device comprises a piezoelectric actuator, an energy taking coil arranged on a main loop of the vacuum switch, and a first friction surface and a second friction surface which are arranged in parallel, wherein the input end of the piezoelectric actuator is connected with the output end of the energy taking coil, the output end of the piezoelectric actuator is connected with the first friction surface, and the second friction surface is fixed on an operating mechanism transmission rod of the vacuum switch; the energy taking coil is used for sensing a current signal on the main loop and outputting a corresponding voltage signal to the piezoelectric actuator according to the current signal; the piezoelectric actuator is used for applying a driving force to the first friction surface under the condition that the change amplitude of the detected voltage signal is greater than a preset threshold value; the driving force is used for driving the first friction surface and the second friction surface to generate friction force, so that the vacuum switch is kept in a closed state under a short-circuit fault. The device can ensure that the switch is kept in a closed state during a fault.

The invention relates to a load transfer switch (1) for a load tap changer (2), comprising at least one vacuum interrupter (30), a handling element (50) which is mechanically connected to the vacuum interrupter (30) on a first end (51) and has a roller (53) on a second end (52), a handling body (10) which has a base body (11) and at least one cam (20), wherein the vacuum interrupter (30) is handled via the handling element (50) by the roller (53) being driven over the handling body (10), at least one part (21) of the cam (20) having a higher strength than the base body (11).

The utility model relates to the technical field of tray fixing, in particular to a tray fixing device with guiding and self-positioning functions, which comprises a workbench, an upper machine tray is mounted on the workbench, an upper and lower surface communicating notch is formed in the upper machine tray, and a carrying strip positioning pin is mounted on the outer side of the upper and lower surface communicating notch. A carrying strip is connected to the carrying strip positioning pin, a vacuum switch is installed on the bottom side of the workbench, and a vacuum head is arranged on one side of the vacuum switch. According to the scheme, the structure of the tray device is simplified, the operation convenience of production personnel is improved, the risk that products are damaged in the operation process is reduced, the repeated positioning precision of the products is improved, production abnormity caused by inaccurate positioning is reduced, and the production efficiency is improved.

The application discloses a kind of vacuum switch contact ablation intelligent evaluation method based on physical information fusion, belong to vacuum circuit breaker technical field.The method of the present application includes: according to the data set of vacuum switch breaking type obtained from vacuum arc experimental data, construct physical information enhanced support vector machine to predict breaking type of working condition;Vacuum arc simulation model is extracted from each working condition Contact surface energy flow density radial distribution data, and is fitted by Gaussian function;Based on the energy flow density radial distribution curve obtained by fitting, a vacuum arc simulation data set is constructed, and a physical information enhanced Gaussian process regression is constructed to predict the energy flow density of the working condition;Combining the heat transfer model to solve the radial distribution of contact surface temperature, further quantitatively evaluate the ablation degree of contact surface, and output the ablation degree level.The present application embeds the physical law of vacuum arc into machine learning model, realizes the breaking type prediction, energy flow density prediction and contact temperature rise calculation and ablation degree calculation and evaluation.

The invention discloses a control method of a multi-port direct current change-over switch based on a controllable negative voltage source, and belongs to the technical field of power system control. Before current conversion, the through-flow vacuum switch and the commutation vacuum switch are switched on, and other assemblies are switched off. When the current of the main branch to be cut off is in the forward direction, the through-flow vacuum switch is switched off, and the thyristors VT1 and VT4 and the forward conduction assembly are triggered to enable the current to flow to the commutation branch; and opening the commutation vacuum switch, adjusting the controllable square wave voltage source by using the same frequency / frequency division control method, so that the current is transferred to the LC branch, and finally, the current is transferred to other main branches through the action of the MOV. And when the current is reverse, the VT2, the VT3 and the reverse conducting assembly are triggered, and the subsequent steps are similar. The same frequency / frequency division control method is realized by controlling the switching frequency of the IGBT, and the methods are different when the number of the trigger branches is one or more. The control method is simple, current in different directions can be rapidly transferred, and the control methods of the sending end and the receiving end are consistent.

The application relates to a medium-voltage air-charge cabinet control panel and a control method for dynamically displaying the working state of a bus, wherein the control panel is provided with an LED lamp strip for displaying the working state of the bus; the LED lamp strip for displaying the working state of the bus comprises three lamp strip bands; the three lamp strips are respectively displayed as yellow, green and red; three sensors are arranged in the control cabinet for each phase of the bus; the sensors for each phase comprise an upper inlet bushing sensor, a vacuum switch tube lower port sensor and a lower outlet wire bus bushing end sensor; secondary voltage signals are sensed by the sensors, are led out from the cabinet body through an aviation plug, and three sensors are arranged for each phase; the sensors are connected with the lamp strips; each sensor controls a section of the lamp strip. The medium-voltage air-charge cabinet control panel and the control method can faster find problems, more accurately display fault positions, timely eliminate faults, are safe and reliable, and guarantee safe operation of equipment.

The invention relates to a high-voltage circuit breaker (1), comprising a vacuum switching tube (7) which is electrically connected to two high-voltage terminals and which is designed to establish an electrical connection in accordance with a mechanical switching actuation (8), for which purpose the vacuum switching tube (7) has a switching contact (10) which is movably arranged in a tube housing (9), characterized by a closing spring (15) which is arranged in the tube housing (9) and which is arranged in the tube housing (9), the invention relates to a switching device (1) comprising a switching contact (10), a closing spring (13) configured to transmit a mechanical switching operation (8) to the switching contact (10), a contact hold-down spring (13) configured to maintain a closing state of the switching contact (10), the closing state being occupied by the switching contact (10) after the switching operation (8) is transmitted to the switching contact (10), a spring energy store (26) configured to store the mechanical switching operation (8) on the switching contact (10), the spring energy store (26) is designed to be at least partially tensioned immediately before the switching contact (10) enters the closed state, and wherein the spring energy store (26) is designed to at least partially transmit the stored tensioning energy to the contact pressure spring (13) when the switching contact (10) enters the closed state. The invention also relates to a high-voltage power switching device (2) and a method.

The utility model relates to a bus socket and a normal pressure switch cabinet, an isolation switch device in a cabinet body is arranged above a vacuum switch unit, the bus socket comprises an insulator and a central conductor, the insulator is provided with a plugging port and a second end portion, the central conductor comprises a plugging conductive rod correspondingly arranged in the plugging port, and the second end portion is provided with a second end portion. The plug-in conducting rod is connected with an electric connecting piece, the electric connecting piece is provided with an electric connecting portion corresponding to the second end portion, the insulator comprises a plug-in seat portion with a plug-in port formed in one end, a 7-shaped connecting lever is integrally formed on one transverse side of the plug-in seat portion and comprises a lateral protruding portion protruding on the transverse side wall of the plug-in seat portion, and the plug-in seat portion is provided with a plug-in port formed in the other end of the plug-in seat portion. The end part of the longitudinal handle part forms a second end part, the longitudinal handle part extends along the direction opposite to the direction of the plugging port, the second end part on the longitudinal handle part is longer than the end part of the plugging seat part, and the longitudinal handle part of the bus socket extends to an electric connection end at the top of the disconnecting switch device and is electrically connected with the electric connection end. The bus socket is reasonable in structural design and convenient to install and use.

The invention provides a circuit breaker with a current-limiting reactor LR switching function. The circuit breaker comprises a mechanical switch K1, a first thyristor D1, a current-limiting reactor LR, a coupling inductor LO and a power supply VDD, the positive electrode of the mechanical switch K1 is respectively connected with the current limiting reactor LR, the first thyristor D1 and the power supply VDD; the negative electrode of the mechanical switch K1 is respectively connected with the current limiting reactor LR, the first thyristor D1 and the vacuum switch K2 through the primary side of the coupling inductor LO; the negative electrode of the vacuum switch K2 is connected with the negative electrode of the power supply VDD through the load R. When the circuit breaker is in rated operation, current only passes through the mechanical switch and the vacuum switch, so that the system loss is reduced, and the energy transmission efficiency of the circuit breaker is improved; in a fault state, the current limiting reactor is put into use, so that the effect of limiting the rising rate of the fault current of the system can be achieved, and favorable guarantee is provided for fault removal of the circuit breaker; and the speed of transferring the fault transient current from the mechanical switch to the current limiting reactor is improved.

The utility model relates to a shielding device for a vacuum switch and the vacuum switch with the shielding device. The shielding device comprises a pair of shielding plates, each shielding plate comprises a main body part which is of a straight plate structure extending in the vertical direction and is arranged opposite to the transmission device in the transverse direction; a pair of connecting parts which are respectively arranged at two longitudinal ends of the main body part adjacent to the vertical end side of the arc extinguishing device, and each connecting part is configured to extend away from the main body part in the vertical direction and extend towards the other shielding plate in the transverse direction; the first arc-shaped extension parts are arranged on the two longitudinal sides of the main body part and the vertical end side far away from the arc extinguishing device; the pair of second arc-shaped extension parts are respectively arranged on the transverse end sides, back on to the other shielding plate, of the connecting parts and the vertical end sides, far away from the main body part, of the connecting parts; the curvature radius of the first arc-shaped extending part ranges from 8 mm to 20 mm, and the pair of second arc-shaped extending parts continuously extend from the two longitudinal sides of the first arc-shaped extending part respectively and are in smooth transition connection with the first arc-shaped extending part.

The utility model provides a self-locking mechanism for a high-voltage vacuum switch. According to the self-locking mechanism for the high-voltage vacuum switch, a high-voltage vacuum switch body is installed at the top of a buffering bottom frame, a brake shaft is installed on one side of the high-voltage vacuum switch body through a brake head, a soft sleeve is arranged at the position, close to the other end, of the outer surface of the brake shaft, and a fixing ring is installed on the outer surface of the brake shaft; mounting bolts are fixedly connected to the top and the bottom of the fixing ring, clamping rings are mounted at the positions, close to one sides, of the outer surfaces of the mounting bolts, mounting openings are formed in the tops and the bottoms of the clamping rings, and fixing discs are fixedly connected to the opposite faces of the interiors of the mounting openings; the other end of each fixing disc is provided with a connecting bolt through a reset spring. According to the self-locking mechanism for the high-voltage vacuum switch provided by the utility model, bidirectional self-locking of the brake shaft on the high-voltage vacuum switch body can be realized through the structure, and the safety of the high-voltage vacuum switch body after opening and closing can be improved.

The invention discloses a mechanochemical planetary high-energy machine for powder grinding, a planetary grinding blade assembly performs multidirectional high-speed rotation in a tank body to form efficient mechanochemical acting force, the powder grinding efficiency is remarkably improved, and in the grinding process, the powder can be ground by adjusting the rotating speed of a driving motor, controlling the atmosphere environment through an air inlet / outlet system and the like. Precise control over material granularity, uniformity and chemical modification is achieved, so that the product quality is improved, the feeding and discharging mechanism integrates a plurality of modules such as a material mixing fan, a feeding assembly, a material returning assembly, a discharging assembly and a mixed material returning assembly, automatic feeding, grinding, separating, material returning, discharging and storing processes are achieved, and the production efficiency is improved. And intelligent control components such as the vacuum switching valve, the feeding rotary valve, the discharging intelligent control air door and the separation intelligent control air door are arranged, so that the whole technological process can be accurately controlled, manual intervention is reduced, and the production continuity and stability are improved.

The utility model relates to the technical field of vacuum switches, in particular to a heat dissipation type solid-sealed polar pole which comprises a vacuum arc-extinguishing chamber, an upper outgoing line, an insulating pull rod, a lower outgoing line electrically connected with a moving contact of the vacuum arc-extinguishing chamber through flexible connection, a resin shell and a heat dissipation mechanism used for cooling the vacuum arc-extinguishing chamber. The heat dissipation mechanism comprises an inner heat conduction ring arranged on the outer wall of the vacuum arc-extinguishing chamber in a sleeving mode, an outer heat conduction ring arranged on the outer wall of the resin shell in a sleeving mode, a plurality of heat conduction rods evenly distributed outside the vacuum arc-extinguishing chamber in the circumferential direction, a plurality of heat dissipation fins evenly distributed outside the resin shell in the circumferential direction and an insulating cylinder covering the heat dissipation fins in an annular mode, and the inner ends of the heat conduction rods are connected with the inner heat conduction ring. The outer end of the heat conduction rod penetrates through the resin shell to be connected with the outer heat conduction ring, the insulating cylinder is a conical cylinder with two open ends, one vertical edge of the cooling fin is connected with the outer wall of the resin shell, and the other vertical edge of the cooling fin is connected with the inner wall of the insulating cylinder. According to the scheme, the cooling rate of the vacuum arc-extinguishing chamber can be accelerated, and the service life of the solid-sealed polar pole is effectively prolonged.

The utility model discloses a 31.5 kA short-time withstand current vacuum switch tube for increasing creepage distance along a surface, which comprises a vacuum switch tube main body, the vacuum switch tube main body is composed of a ceramic shell, a movable conducting rod, a static conducting rod, a movable end sealing cover, a static end sealing cover, a corrugated pipe, a shielding cover, a movable contact and a static contact, the ceramic shell is of a cylindrical structure, the length of the ceramic shell is 130 + / -0.2 mm, and the width of the corrugated pipe is larger than that of the movable end sealing cover. The outer side face of the porcelain shell is of a corrugated structure, the corrugated structure is provided with wave crests and wave troughs, the diameter of the wave crests is 92 mm, the diameter of the wave troughs is 83 mm, and the creepage distance, formed by the wave crests and the wave troughs, of the outer side face of the porcelain shell is 244 mm. According to the utility model, through the arrangement of the overall structure, the creepage distance is increased, so that the vacuum switch tube can be used in an environment with an altitude of 1000 meters or below, the application range of the vacuum switch tube is expanded, and the stability of the vacuum switch tube is improved.

The utility model discloses a circuit breaker switch for a 24kV circuit breaker switch cabinet, which comprises a vacuum switch and an isolating switch, the vacuum switch comprises a vacuum arc-extinguishing chamber, the isolating switch comprises an isolating switch static contact, the isolating switch static contact is lapped at the static end of the vacuum arc-extinguishing chamber through a connecting device, the connecting device comprises a pressing rod and a contact support, and the pressing rod is in lap joint with the contact support. The compression bar is in threaded connection with the contact support, the compression bar is movably connected with the contact support, and the static contact and the static end of the disconnecting switch are kept in a lap joint state and the fixed height of the vacuum arc-extinguishing chamber is adjusted through the movement of the compression bar, so that the height of the compression bar can be adjusted in the vertical direction, and the fixed height of the vacuum arc-extinguishing chamber is further adjusted; the pressure of the moving contact at the moving end of the three-phase vacuum arc-extinguishing chamber and the wear compensation over-travel of the moving contact are adjusted, so that the lapping effectiveness of the contact within the allowable wear extent range of the contact is ensured.

The invention discloses a vacuum switch for a flexible direct current system and a closing method, and relates to the technical field of vacuum switches. The static end assembly is arranged at one end of the insulating shell and comprises a static conducting rod, a static contact connected to the inner end of the static conducting rod and a static end cover connected with the insulating shell in a sealing manner; the moving end assembly is arranged at the other end of the insulating shell and comprises a moving conductive rod, a moving contact connected to the inner end of the moving conductive rod and a moving end cover connected with the insulating shell in a sealing manner; the sealing element is arranged between the movable conducting rod and the movable end cover; wherein one of the static contact and the moving contact is of a conical structure, and the other one of the static contact and the moving contact is of a conical nest structure matched with the conical structure. According to the vacuum switch, the problems of huge size, insufficient action speed and low closing reliability caused by huge electric repulsive force when a traditional vacuum switch closes extra-large short-circuit current of a flexible direct current system can be solved.

The application relates to a method and device for determining the breaking capacity of a vacuum switch device. The method comprises: obtaining critical current data of the vacuum switch device at each time when executing a simulation opening command; obtaining estimated current data of a target circuit to be cut off by the vacuum switch device; determining a target separation time range corresponding to the vacuum switch device; determining an adjustment strategy for adjusting the estimated current data according to the difference between the short-circuit current of the target circuit at each separation time within the target separation time range and the critical current data at the corresponding separation time; adjusting the estimated current data according to the adjustment strategy, and continuing the determination step of the adjustment strategy until the adjustment amount in the adjustment strategy is less than a preset adjustment amount, and determining the breaking capacity of the vacuum switch device according to the estimated current data when the adjustment amount is less than the preset adjustment amount. The method can improve the evaluation accuracy of the breaking capacity of the vacuum switch device.

The invention relates to a vacuum switch (1). The vacuum switch (1) comprises a vacuum switching tube (3) with a tube housing (5) and two contact elements (7, 9) projecting into the tube housing (5), of which a first contact element (7) is movable relative to the tube housing (5) and the second contact element (9) between a first switching position, in which the first contact element (7) is in contact with the second contact element (9), and a second switching position, in which the first contact element (7) is separated from the second contact element (9). Furthermore, the vacuum switch (1) comprises a braking unit (11) configured to brake the movement of the first contact element (7) from the first switching position to the second switching position, and which is arranged near the tube housing (5).

The invention relates to a method for calibrating a pressure measurement, comprising the steps of: providing at least one vacuum switching tube (1); applying an electric field (23) and a magnetic field (24) to the interior (26) of the vacuum switching tube at a plurality of different pressures (p x ) of the vacuum in the interior space, such that a gas discharge is generated in the interior space, wherein a plurality of gas discharges are generated at each of the pressures, wherein the electric field in the interior space has an orientation different from the magnetic field; Determine for each of the gas discharges a delay (Δt) which is the time interval between a time zero (t0) and a generation time (t1), wherein the time zero is the first time in time at which the electric field and the magnetic field are present, wherein the gas discharge is generated at the generation time; Determine for each a distribution (fp x) the delays at each of the pressures; determining a confidence interval (C x ) the distribution at each of the pressures, with a lower limit (uG) for each x ) and an upper limit (oG x ); Determining an upper calibration function (oF) where an upper pressure of the vacuum is determined based on the upper limits from the respective delays (Δt), the majority of gas discharges for each of the pressures px.

The utility model discloses a thermostable vacuum switch tube contact structure, which relates to the technical field of vacuum switch tube contact structures, and comprises a vacuum tube, a sealing sleeve is arranged on the vacuum tube, a static contact and a moving contact are arranged in the vacuum tube, iron core assemblies are arranged on the static contact and the moving contact, one end of the static contact is provided with a static end conducting rod, and the other end of the static end conducting rod is provided with an iron core assembly. One end of the moving contact is provided with a moving conductive rod, and the moving conductive rod is provided with an elastic sheet. According to the utility model, through the arrangement of the elastic sheet, the elastic sheet instantly generates deformation and changes from downward bending to upward bending, so that the moving contact and the static contact are rapidly driven to be separated through the spherical surface, arc generation caused by insufficient contact and separation speed of the moving contact and the static contact is avoided, and the working safety of the contact structure is guaranteed; through the mutual cooperation of the longitudinal groove, the magnet and the arc striking groove, the electric arc is led out through the arc striking groove and enters the longitudinal groove after being generated at the center of the contact, thereby preventing the electric arc from gathering, achieving the rapid arc extinguishing, and improving the breaking capacity.

The utility model discloses a kind of high-purity membrane box absolute pressure vacuum switches, it is related to high-purity technical field, including lower connector, the middle part of lower connector is provided with vertical through-hole, vertical through-hole is fixed with flow guide pipe inside, the upper end of flow guide pipe is fixed with membrane box assembly, the inner chamber of flow guide pipe and membrane box assembly is communicated, the upper end of lower connector is threadedly connected with upper connector, the upper end of lower connector inside is threadedly connected with switch fixing sleeve, the surface of switch fixing sleeve is threadedly connected with limiting nut, the lower end in switch fixing sleeve inside is fixed with microswitch by switch fixed pin, the upper end of microswitch and membrane box assembly is inlaid, the upper end of upper connector is fixed with serial port connector by two hexagonal fixed screws, can accurately monitor tiny absolute pressure change, and can avoid damage under instantaneous overvoltage or impact condition.

This utility model discloses a high-voltage-resistant vacuum switch tube, comprising a metal outer tube, a ceramic inner tube, and a ring. The outer wall of the ceramic inner tube is fitted with the metal outer tube, and the two ends of the ceramic inner tube are fitted with rings. The switch tube body is disposed inside the ceramic inner tube, and the two ends of the switch tube body extend to the outside of the rings and are fixedly connected to contacts. The lower surface of the ring has a protrusion that extends into the metal outer tube. Heat-conducting ring blocks are fixedly connected at equal intervals to the inner wall of the metal outer tube. The vacuum environment between the metal outer tube and the ceramic inner tube improves the overall voltage resistance level and effectively blocks the discharge path under high voltage. At the same time, the elastic metal sheet is inclined to increase the contact area with the ceramic inner tube. During operation, the elastic metal sheet can continuously remove the heat generated by the resistance and arc of the switch tube body, avoiding heat accumulation and temperature exceeding the limit, ensuring that the switch tube body operates stably within a suitable temperature range, and improving the overall reliability of the switch tube.