331 results about "Vacuum arc" patented technology

The invention relates to the technical field of fault diagnosis, in particular to a pole-mounted circuit breaker fault diagnosis method based on multi-information fusion, and the method comprises the steps: firstly obtaining electric quantity modal data such as three-phase current and coil current and mechanical quantity modal data such as mechanism vibration and voiceprint, and constructing a time-frequency domain alignment feature tensor; then, through a graph space-time attention fusion model, deeply mining physical structure association and time sequence evolution laws among heterogeneous data, and generating a dynamic space-time feature matrix; then, respectively constructing a mechanical evidence body for representing the state of the transmission chain of the operating mechanism and an electrical evidence body for representing the working condition of the vacuum arc-extinguishing chamber by adopting a feature level-decision level mixed framework; an improved D-S evidence theory is applied for fusion, when high-conflict evidences are detected, a self-adaptive arbitration mechanism is automatically triggered, conflict weights are dynamically attenuated or distributed to uncertain items, misjudgment is effectively avoided, and high-robustness collaborative diagnosis of the electromechanical state is achieved.

The invention belongs to the technical field of research and development of fast neutron reactor jackets and structural materials, and particularly relates to a high-temperature-lead-bismuth-corrosion-resistant high-silicon-content ferrite / martensite steel ladle tube and a preparation method thereof. According to the mass percentage, the composition mainly comprises the following components: 0.16-0.24% of C; 0.4 to 0.8 percent of Mn; cr: 11.6% to 12.4%; 1.2 to 1.8 percent of W; 0.1 to 0.4 percent of Ta; 0.2 to 0.4 percent of V; 1.0%-1.8% of Si and Fe. The preparation method comprises the steps of vacuum induction and vacuum arc remelting. Carrying out homogenization treatment and forging; extruding and annealing; cold rolling and annealing; and performing normalizing and tempering treatment. Through an efficient short-flow process route and reasonable smelting, pipe machining deformation and heat treatment processes, the microscopic structure of the material is remarkably improved, then the mechanical property and high-temperature lead and bismuth corrosion resistance of the finished pipe are improved, and the use requirement of the lead and bismuth cooling fast reactor fuel assembly cladding material under the high-temperature working condition is met.

The invention relates to the technical field of power equipment, in particular to a vacuum pole-mounted circuit breaker, which comprises a vacuum arc-extinguishing chamber and a mechanism box, a static contact and a moving contact are inserted in the vacuum arc-extinguishing chamber, and under the action of the mechanism box, the moving contact can be close to or far away from the static contact and can be conducted with the static contact; a conductive part is arranged between the static contact and the moving contact, the conductive part can generate elastic deformation, can be in stop fit with the static contact or the moving contact, and is configured to be conducted with the static contact and the moving contact before the static contact and the moving contact are conducted. Therefore, the problem of arc erosion between the static contact and the moving contact is effectively avoided in a mode of transferring an arc generation position, the bounce amplitude of the moving contact is reduced by utilizing the elastic deformation characteristic of the conductive part, the service life of the static contact and the moving contact can be ensured while the wear of the static contact and the moving contact is reduced, and the service life of the static contact and the moving contact is prolonged. And the conductivity between the static contact and the moving contact can be ensured.

The invention relates to the technical field of high-voltage electric appliance detection, in particular to a device and method for detecting the vacuum degree of a vacuum arc-extinguishing chamber, and the method comprises the steps: arranging a field emission cathode on one metal end cover of the vacuum arc-extinguishing chamber; an anode is arranged on the metal shielding cover close to the field emission cathode in the vacuum arc-extinguishing chamber; the high-voltage direct-current power supply is connected to the field emission cathode and the anode and is used for applying voltage to the electrodes so as to drive the field emission cathode to emit electron beams to impact the anode; the X-ray energy spectrum detector directly faces the anode, the X-ray energy spectrum detector is used for measuring bremsstrahlung X-ray energy spectrum generated when the electron beam impacts the anode, an electron emission source is actively arranged in the arc extinguish chamber, and the distribution of the X-ray energy spectrum generated by the electron emission source is measured. And high signal-to-noise ratio, high-precision and high-sensitivity vacuum degree quantitative detection is realized by utilizing the strong correlation between the energy spectrum form and the internal gas pressure.

The invention relates to a pole-mounted circuit breaker monitoring method and system, electronic equipment and a medium. The method comprises the following steps: acquiring a voltage recovery waveform characteristic and a mechanical vibration characteristic during operation of a vacuum arc-extinguishing chamber, and performing timestamp alignment; calculating a contact gap conductive channel risk value based on the aligned waveform characteristics; generating breaking capacity attenuation trend characteristics by combining the historical breaking current peak value, the breaking times and the risk value; calculating the remaining service life according to the trend characteristics, and synchronously obtaining a fault probability value according to the conductive channel risk value; and finally, according to the residual service life and the fault probability value, determining a maintenance early warning level and outputting a maintenance early warning signal. Therefore, according to the method, the risk of the conductive channel is evaluated through fusion of the operation waveform and the mechanical signal, and the breaking capacity attenuation trend is extrapolated along the historical breaking data, so that online evaluation and advanced early warning of the health state of the pole-mounted circuit breaker are realized, and the operation reliability and the operation and maintenance efficiency of the key node of the power distribution network are improved.

The invention discloses a super-fusion pole-mounted switch device, belongs to the technical field of switch devices, and discloses the super-fusion pole-mounted switch device which comprises a switch body, a power taking unit and a feeder terminal. The switch body comprises a deep fusion solid-sealed polar pole which is integrally poured, a vacuum arc extinguish chamber, an isolating switch contact and a voltage and current sensor are integrated in the switch body, and the electricity taking unit supplies power to the deep fusion solid-sealed polar pole through a separable spring electric contact structure; the feeder terminal is embedded in the switch box body and is operated in a hot-line mode through a special operating rod. The invention further provides a transient electromagnetic interference suppression module which is used for eliminating electromagnetic interference in the equipment. The CLC topological power taking unit can adapt to multiple working conditions; the state monitoring module is fused with multi-source data to diagnose faults, and the problems that an existing primary and secondary fusion column switch is low in fusion degree, weak in anti-electromagnetic interference, poor in electricity taking reliability and low in intelligence are solved. The equipment can supply power to the 10kV power distribution network intelligently, the reliability is improved, and the operation and maintenance cost is reduced.

The invention relates to the field of circuit breakers, and provides a circuit breaker which comprises an insulating shell and a pull rod mechanism, a power connection end is arranged on the side face of the insulating shell, the circuit breaker further comprises a first capacitor and a second capacitor, and the first capacitor is arranged in the insulating shell and electrically connected with a first conductive metal body of the power connection end; the second capacitor is arranged in the insulating shell, a second conductive metal body electrically connected with the second capacitor is arranged at the end part of a moving contact of the vacuum arc-extinguishing chamber of the insulating shell, and a first interface and a second interface are arranged on the side wall or the end part of the insulating shell. The circuit breaker is connected for use, and the power connection end is connected with external detection or feedback equipment, so that the working state of the circuit breaker is monitored and fed back in real time. When the circuit breaker is disconnected, the first capacitor and the second capacitor can be used for detection so as to determine whether the interior of the circuit breaker is completely powered off, that is, no residual voltage exists on the power connection end and the moving contact part, so that safe and reliable operation is ensured.

A vacuum induction melting (VIM) furnace and method of using. A VIM is configured for use with metal-containing carbon powders. In operation, the metal-containing carbon powders are formed into a pellet so as to minimize or eliminate ejection of material during introduction of the pellet into the VIM processor. The VIM processor may be substituted or used in combination with a vacuum arc melt processing apparatus, an electron beam melt furnace, an ion plating furnace, a plasma flame source, a smelter, a traditional metal-metal melt furnace, or any equivalent. Pelletizing can be accomplished through use of a press or through application of any pelletizing technique and / or use of any apparatus that is able to generate pellets that have sufficient mass to avoid ejection from a VIM processor.

The invention discloses a vacuum arc extinguish chamber structure with large rated current and strong breaking capacity, which comprises a structure body, and is characterized in that the structure body comprises a static contact assembly, the static contact assembly comprises a static end arc contact and a static end main contact, and the static end arc contact is arranged in front of the static end main contact and protrudes for a preset distance d along the on-off direction; and the moving contact assembly comprises a moving end main contact and a moving end arc contact, and the moving end main contact and the moving end arc contact are located on the same plane. According to the invention, the effect that the main contact does not burn arc during breaking is realized, the contact surface of the main contact is protected from being ablated by the arc, and a physical foundation is laid for the high capacity of the vacuum arc-extinguishing chamber. The moving end arc contact is provided with a coil structure so as to generate a transverse magnetic field or a longitudinal magnetic field, and the magnetic lines of force between the static end arc contact and the moving end arc contact have the combined action of the longitudinal magnetic field and the transverse magnetic field, so that the breaking capacity is high.

The invention relates to the technical field of electric power, in particular to a vacuum circuit breaker and a phase selection closing control method, and the vacuum circuit breaker comprises a hybrid electromagnetic mechanism and a vacuum arc-extinguishing chamber; the hybrid electromagnetic mechanism comprises a permanent magnet closing assembly and an electromagnetic repulsion opening assembly, the permanent magnet closing assembly comprises double coils and a T-shaped movable iron core which are arranged in parallel, and a discharge loop is formed to drive a movable contact of the vacuum arc-extinguishing chamber to complete a closing action and maintain a closing state; the electromagnetic repulsion opening assembly comprises a static coil panel and a moving coil panel which are coaxially and oppositely arranged to form a reverse current repulsion loop so as to drive a moving contact of the vacuum arc-extinguishing chamber to complete an opening action and maintain an opening state, and the moving coil panel is connected with a T-shaped moving iron core of the permanent magnet closing assembly through an insulating guide rod; the vacuum arc-extinguishing chamber comprises a driving connecting rod, a moving contact and a static contact, one end of the driving connecting rod is connected with the moving contact, and the other end of the driving connecting rod is connected with the insulating guide rod. Therefore, the opening and closing speed of the vacuum circuit breaker is improved.

The invention discloses a circuit breaker with external vacuum arc extinguish chambers, and belongs to the technical field of circuit breakers, the circuit breaker with the external vacuum arc extinguish chambers comprises a circuit breaker body, the circuit breaker body is provided with a plurality of external arc extinguish chambers, the top of each external arc extinguish chamber is fixedly provided with a terminal, the side wall of each terminal is fixedly provided with a cushion block, and the cushion blocks are fixedly connected with the external arc extinguish chambers. A fixed clamping jaw is movably arranged outside the cushion block, the other ends of the multiple arc-shaped rods are jointly and fixedly provided with a top grading ring, two connecting rods are fixedly arranged at the bottom of the top grading ring, and a bottom grading ring is fixedly arranged at the bottoms of the two connecting rods. According to the invention, the top grading ring and the bottom grading ring are arranged outside the external arc extinguish chamber, the electric field of the external arc extinguish chamber can be homogenized, and the top grading ring and the bottom grading ring can be fixed on the side wall of the external arc extinguish chamber due to the existence of the fixed clamping jaw and the fixing mechanism. Therefore, the vibration influence during the switching-on and switching-off operation of the circuit breaker is avoided.

According to the preparation method for preparing the CuCr alloy with the high Cr content through the vacuum non-consumable electric arc furnace or the induction melting furnace, through the design concept of microelement alloying, the CuCr alloy can be fully and evenly diffused in the smelting process by adding a trace amount of miscible elements such as Al and Ti; the alloy comprises, by mass, 44%-52% of Cu, 43%-47% of Cr, 2%-8% of Al, 0%-5% of Ti, 0%-2% of Mo and 0%-2% of Nb, and elements with the purity larger than 99.9 wt% serve as raw materials. Compared with an infiltration method, the alloy material prepared by the method disclosed by the invention is more compact in structure, smaller in grain size of the Cr phase and higher in hardness, so that the alloy material has excellent wear resistance and mechanical properties.

The invention discloses a preparation method of a high-temperature strain gauge grid wire, and the preparation method comprises the steps: carrying out the vacuum arc melting of a super-high-temperature-resistant strain alloy material, rolling into a foil material with uniform radian, and carrying out the heat treatment of the foil material, thereby obtaining a uniform fine-grain structure. And preparing the foil subjected to heat treatment into grid wires by using a femtosecond laser direct writing technology, subsequently performing in-situ real-time monitoring and defect self-correction on the grid wires, and finally performing functional post-treatment and integrated packaging on the grid wires. According to the preparation method of the high-temperature strain gauge grid wire, femtosecond laser is used for replacing traditional mechanical means such as drawing and wire winding to prepare the grid wire, the grid wire is uniform in size, high in precision and good in material performance, and therefore the measurement precision of the grid wire can be guaranteed, and meanwhile the grid wire has long-term reliability in a high-temperature environment; and the preparation process of the grid wire can be integrated on one laser platform, so that the preparation process is simple and efficient, and the production cost is reduced.

The invention relates to an environment-friendly switch vacuum arc-extinguishing chamber contact temperature monitoring method and system based on surface acoustic wave array sensing and inversion, and belongs to the field of electrical monitoring. In order to solve the problem that in the prior art, non-intrusive and high-reliability monitoring of the contact temperature of the vacuum arc-extinguishing chamber is difficult to realize due to vacuum sealing and metal shielding, the technical scheme of the invention is as follows: an acoustic surface wave sensor array comprising three or more sensing nodes is constructed on the outer wall of the vacuum arc-extinguishing chamber, and the longitudinal temperature gradient distribution of the outer wall is captured in a lossless manner. A narrow-band flat-plate reader antenna is adopted to realize array signal parallel transmission with a high signal-to-noise ratio, and the steady-state temperature of an internal contact is accurately inverted through a pre-trained physical information neural network (PINN) model by utilizing multi-source data fusion and array characteristics. According to the method, a non-intrusive monitoring function from external sensing to internal deduction is realized, the problem that the temperature of the contact cannot be measured in a high-voltage closed environment is solved, and a key technical support is provided for safe operation of environment-friendly switch equipment.

The application belongs to the technical field of copper wire preparation, and discloses a preparation process of high-strength and high-toughness copper wire. The preparation process comprises the following steps: mixing Ni, Co and Al element powders according to a molar ratio of 0.95-1.05:0.95-1.05:0.95-1.05, and then high-energy ball milling to obtain Ni-Co-Al middle-entropy alloy micro powder, and then vacuum arc melting or discharge plasma sintering to obtain Ni-Co-Al middle-entropy alloy; mixing the Ni-Co-Al middle-entropy alloy with tungsten copper alloy and copper ingot for melting, cooling the molten copper water through a condensing device, drawing out by a traction mechanism, annealing treatment, winding by a rewinding machine after cooling, and obtaining the copper wire. The application takes the copper ingot as a base material, the tungsten copper alloy as a reinforcing phase, and the Ni-Co-Al middle-entropy alloy as a bonding phase, and the copper wire is prepared by conventional mixed melting, so that the application has the advantages of simple processing method and low production cost.

This invention discloses a rare-earth Ce-purified Ti-Mn-based hydrogen storage alloy and its preparation method. The preparation method includes the following steps: mixing FeV80 with Ce and melting it in a vacuum arc melting furnace under an argon protective atmosphere; polishing the surface of the FeV80-yCe master alloy to remove the surface-enriched impurity phases, obtaining a purified master alloy; mixing the purified master alloy with Ti, Zr, Mn, and Cr raw materials and arc melting it under vacuum conditions; after melting, cooling it to room temperature with the furnace to obtain the rare-earth Ce-purified Ti-Mn-based hydrogen storage alloy. This invention pre-treats FeV80 with Ce, and removes impurities enriched on the surface of the metal ingot through melting and then polishing. The process is simple and cost-controllable, fundamentally solving the problem of impurity deterioration in industrial raw materials, improving the hydrogen storage capacity of the hydrogen storage alloy at 5MPa hydrogen pressure, and meeting the comprehensive performance requirements for industrial applications.

The vacuum contact comprises a static end contact and a moving end contact, the static end contact comprises a first transverse magnetic assembly and a first longitudinal magnetic assembly, the first transverse magnetic assembly comprises a first spiral arm contact piece and a first conducting rod, the first longitudinal magnetic assembly is of a hollow structure, and the first longitudinal magnetic assembly is arranged on the peripheral side of the first conducting rod in a sleeving mode; the first radial arm contact blade is fixed at one end of the first conducting rod and is in contact with the first longitudinal magnetic assembly; the moving end contact comprises a second transverse magnetic assembly and a second longitudinal magnetic assembly, the second transverse magnetic assembly comprises a second radial arm contact blade and a second conducting rod, the second radial arm contact blade is fixed at one end of the second conducting rod and is arranged opposite to the first radial arm contact blade, and the second longitudinal magnetic assembly is of a hollow structure and is fixed on the first radial arm contact blade. The second longitudinal magnetic assembly sleeves the peripheral side of the second conductive rod. The advantages of the two magnetic fields are combined to control movement and diffusion of the vacuum arc, and the breaking capacity of the vacuum contact is improved from the aspect of mechanism.

The invention provides a method for preparing a high-purity niobium ingot by utilizing multistage refining and the high-purity niobium ingot, and the method comprises the following steps: (1) taking aluminum particles, niobium pentoxide, a heat generating agent and a slag former as raw materials, preparing an aluminum-niobium alloy ingot by adopting an exothermic method outside a furnace, and then carrying out surface treatment and crushing treatment to obtain aluminum-niobium alloy particles; (2) the aluminum-niobium alloy particles are subjected to horizontal electron beam smelting, and a smelted niobium plate is obtained; (3) stacking a plurality of smelting niobium plates, and then sequentially performing vacuum diffusion welding and vacuum arc smelting to obtain a primary niobium ingot; and (4) the primary niobium ingot is placed in a double-gun electron beam smelting furnace to be smelted, and the high-purity niobium ingot is obtained. The stable production of the high-RRR value high-purity niobium is realized by adopting a multi-stage refining process coupling system of an aluminothermy method, horizontal electron beam melting, diffusion welding, electric arc melting and double-gun electron beam melting, and the technical problems of high energy consumption, high cost, low production efficiency and the like in the traditional process are effectively solved.

The application provides a generator circuit breaker control system and method based on a stroke curve, which is built by using an electromagnetic repulsion mechanism, a laser displacement sensor, a vacuum arc-extinguishing chamber, a drive circuit, a controller, a transfer capacitor branch and a small-capacity circuit breaker S1, stroke data of a main branch circuit breaker is collected in real time, and a circuit breaker stroke curve model is established. When a short-circuit fault occurs at a generator outlet side, the action time of the circuit breaker is predicted according to the stroke curve of the main branch circuit breaker, and the opening time is optimized through a correction algorithm, so that the fast and accurate control of the generator circuit breaker is realized. The application mainly solves the problem that the existing control method is too dependent on a complex short-circuit current calculation expression, provides a generator circuit breaker control method with small interference and strong universality, and fills the technical blank in the field of generator outlet side circuit control.

The invention relates to the technical field of power equipment, and discloses a high-capacity vacuum circuit breaker and a direct current change-over switch, the high-capacity vacuum circuit breaker is applied to the direct current change-over switch, and the high-capacity vacuum circuit breaker comprises N vacuum arc extinguish chambers and M current sharing structures; wherein the N vacuum arc-extinguishing chambers are mutually connected in parallel and are connected with a first branch circuit of the direct current change-over switch to form N parallel branch circuits, the N vacuum arc-extinguishing chambers are arranged in parallel along a preset direction, the M current-sharing structures are all made of the same magnetic conductive material and are arranged in a closed ring shape, the M current-sharing structures are sleeved on the corresponding vacuum arc-extinguishing chambers, and the M current-sharing structures are connected in parallel with the first branch circuit of the direct current change-over switch. N is an integer greater than or equal to 2, M is an integer greater than or equal to 1, and when the first branch conducts current, equivalent inductance is generated in the branches to limit current transfer between the branches, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1. According to the technical scheme, the equivalent resistance in a normal through-current state can be prevented from being increased while the equivalent inductance of the branch is increased to limit current transfer, the electric energy transmission efficiency is guaranteed, and the loss is reduced.

The utility model discloses an isolation circuit breaker switch module on an environment-friendly ring main unit, and particularly relates to the technical field of switches, the isolation circuit breaker switch module comprises a front mounting plate and a rear mounting plate, an upper contact seat, an operation main shaft, a circuit breaking piece and a wire inlet plate are jointly mounted between the front mounting plate and the rear mounting plate, the operation main shaft is located between the upper contact seat and the circuit breaking piece, and the wire inlet plate is located between the operation main shaft and the circuit breaking piece. The wire inlet plate is located on one side of the operation main shaft, a plurality of power connection heads are arranged on the wire inlet plate, a plurality of operation arms are arranged on the operation main shaft, a plurality of static contacts are installed on the upper contact seat, and a plurality of connection contacts are installed at the top of the circuit breaker. According to the vacuum arc-extinguishing chamber, when the top of the vacuum arc-extinguishing chamber is in contact with the bottom of the connecting contact, a circuit forms a closed loop, current is allowed to pass through to realize a power-on function, when the top of the vacuum arc-extinguishing chamber is separated from the bottom of the connecting contact, secondary circuit disconnection is realized, and the safety and the stability of operation are ensured while the use requirement of the switch is met.

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 provides a closing holding device for a vacuum arc-extinguishing chamber and a vacuum circuit breaker, and belongs to the technical field of switch equipment. The switch-on holding device comprises a spring cylinder, a guide block is installed in the spring cylinder, a switch-on holding spring is installed between the guide block and the cylinder bottom in a pressing mode, the spring cylinder comprises a guide inner circumferential face used for guiding the switch-on holding spring, a lining cylinder is fixedly arranged in the spring cylinder, and the lining cylinder is sleeved with the switch-on holding spring. The lining cylinder comprises a guiding outer peripheral surface, wherein the outer diameter of the guiding outer peripheral surface is matched with the inner diameter of the closing retaining spring so as to guide the compression deformation of the closing retaining spring. According to the invention, the guide outer circumferential surface of the lining cylinder is utilized to guide the compression deformation of the closing retaining spring, and the guide inner circumferential surface of the spring cylinder is combined to realize the inner and outer guide functions of the closing retaining spring, so that the stable output of the magnitude and direction of closing retaining force is ensured, and the good centering effect and stable contact of the moving and static contacts are ensured; and the performance stability and the service life prolonging of the vacuum arc-extinguishing chamber are facilitated.

The utility model discloses a six-groove cup-shaped electrode contact seat structure and a vacuum arc-extinguishing chamber, a first electrode contact seat and a second electrode contact seat are respectively provided with three first chutes which are inclined towards the same direction, and the chutes provide multi-element transmission channels which are clear in guiding for current, so that the current is dispersed, multiple strands of current flow in parallel, and the current transmission efficiency is improved. And meanwhile, through the interval length difference between the first skewed slot and the second skewed slot, the situation that the flow guide section at the root of the skewed slot is limited, the local current density is too large, and the resistance is too high is avoided, and the overall resistance of the loop is reduced in an all-around mode. On the basis of an existing six-groove cup-shaped longitudinal magnetic electrode, through the differentiated long and short contact finger structure design, on the basis of ensuring the on-off performance, the diversion of the electrode is effectively improved, and the requirement of a low-resistance vacuum arc-extinguishing chamber is met.

The application discloses a modular vacuum circuit breaker, comprising an operation box, a base and vacuum arc-extinguishing chambers, the base is connected to the rear of the operation box, the vacuum arc-extinguishing chambers are provided in plurality, and all the vacuum arc-extinguishing chambers are installed in a linear type on the base; the connecting rod mechanism in the base comprises L-shaped lever frames, one L-shaped lever frame is hinged below each vacuum arc-extinguishing chamber, all the L-shaped lever frames are connected through a synchronous frame, and the L-shaped lever frame close to the operation box is connected with an operation mechanism in the operation box; the lubricating mechanism comprises a sealed oil storage cavity at the bottom of the base and a manual booster pump, the pump body end and the piston rod end of the manual booster pump are respectively hinged to the base and the synchronous frame, and the synchronous frame is reciprocated to drive the piston rod to synchronously extend and retract. The application adds the lubricating mechanism, the lubricating mechanism has no electronic parts, is not affected by high ionization and high static electricity environment, can long-effectively lubricate the connecting rod mechanism, and reduces the failure rate of the modular vacuum circuit breaker.

The invention relates to a method and system for detecting the vacuum degree of a vacuum arc-extinguishing chamber based on high-frequency discharge and spectral analysis, and the method comprises the steps: exciting the interior of the vacuum arc-extinguishing chamber to generate field emission current through a high-frequency electric field, and obtaining a high-frequency current peak value through the spectral analysis of the field emission current; the vacuum degree is determined according to a pre-constructed vacuum degree-high-frequency current peak value standard relation curve, a high-frequency power source is connected to a vacuum arc extinguish chamber, the output voltage of the high-frequency power source is gradually increased until a vacuum gap breaks down, the voltage waveform in the process is recorded, and the total current of a loop is calculated; calculating a capacitive current component by combining the equivalent capacitance of the loop; and selecting a stable current section between two dielectric breakdown events in the total current, intercepting a current peak signal in the section, and subtracting the capacitive current component from the total current corresponding to the peak signal to obtain the field emission current. Compared with the prior art, the method has the advantages of high sensitivity, simplicity and convenience in operation, accurate result and the like.

The utility model relates to the technical field of vacuum arc extinguish chambers, in particular to a vacuum arc extinguish chamber shielding cylinder fixing structure which comprises a shell, a shielding cylinder and a plurality of movable parts, the shell is provided with a vacuum cavity, the cavity wall of the vacuum cavity is provided with a first protruding part, and the side wall of the shielding cylinder is provided with a second protruding part. The second protruding part abuts against one end of the first protruding part, and each movable part is in threaded connection with the shielding cylinder, extends out of the outer side wall of the shielding cylinder by a preset distance and abuts against the other end of the first protruding part. And the movable piece abuts against the first protruding part, so that the protrusion with the adjustable extending length is achieved, and the shielding cylinder is prevented from shaking and making abnormal sounds.

The utility model discloses a two-body vacuum arc-extinguishing outdoor grading ring comprising a first arc-shaped member and a second arc-shaped member, the first arc-shaped member and the second arc-shaped member are made of the same metal material, the inner side of the first arc-shaped member is provided with a first arc-shaped groove, the inner side of the second arc-shaped member is provided with a second arc-shaped groove, and the first arc-shaped groove and the second arc-shaped groove are made of metal materials. The first arc-shaped piece and the second arc-shaped piece are oppositely connected to form a complete circular ring, the first arc-shaped piece and the second arc-shaped piece are connected through screws, and the two ends of the first arc-shaped groove and the two ends of the second arc-shaped groove are connected to form a complete circular-ring-shaped groove. According to the utility model, the condition of non-uniform distribution of electric fields on the outer edge surface of the vacuum arc-extinguishing chamber is improved, and the flashover phenomenon on the edge surface in the aging process is reduced.

The application discloses a high-extraction-efficiency ion source structure and sealed neutron tube structure; a TiT thin film target is tightly attached to the inner wall of a closed shell; a target grid is tightly attached to the TiT thin film target, and a negative bias voltage is generated by loading a voltage between the target grid and the closed shell; plasma is generated after a voltage is loaded between a discharge anode and a discharge cathode; the scheme is based on the existing vacuum arc discharge ion source structure and is improved in structure; space is reserved between the discharge cathode and the anode grid for free expansion of the plasma, an open expansion space is provided for the plasma, most of the plasma generated by the discharge can expand into the acceleration zone to obtain energy and bombard the target surface, so that the arc current utilization rate can be increased to about 1%, and the neutron yield can be broken through 1*10 10 n / s.

The utility model discloses a solid-sealed polar pole for a primary and secondary deep fusion circuit breaker switch, which relates to the technical field of solid-sealed polar poles and comprises a solid-sealed polar pole main body, a main body shell is arranged on the periphery of the solid-sealed polar pole main body, an insulating layer is arranged on one side of the main body shell, a flame-retardant layer is arranged on the outer side of the insulating layer, and a waterproof layer is arranged on the outermost side of the main body shell. The main body shell is a component made of a stainless steel material, the insulating layer is a component made of an epoxy resin coating, and the flame-retardant layer is a component made of a rubber insulating coating; a vacuum arc extinguishing chamber is arranged in the solid-sealed polar pole body, a wire outlet side chamber is arranged on one side of the solid-sealed polar pole body, and various protective layers are additionally arranged on the periphery of the main body shell, so that the service life of the main body shell is prolonged, the use safety of the solid-sealed polar pole body is improved, a circuit breaker can be effectively protected, and the service life of the solid-sealed polar pole body is prolonged. And the circuit can be protected in all directions, so that the safety of the circuit is improved.