1089 results about "Vacuum switch" patented technology

The present invention relates to a real time dynamic physics simulation device of flexible DC transmission system. The device includes simulated converter transformer, simulated AC field, simulated DC field, simulated converter reactor, simulated converter, and measurement and control cabinet chassis; the simulated AC field includes the vacuum switch I, the contactor I, resistors and the vacuum switch II connected orderly; the simulated DC field includes successively connected the vacuum switch contactor III and II; the simulated AC field is connected with said measurement and control cabinet chassis; Said converter transformer is set between said resistors and said vacuum switch II; Said simulated converter reactors and said simulated converter connected are set between the vacuum switch II and the vacuum switch III. The present invention can accurately simulate different voltage level flexible DC transmission system based on modular multilevel converter (MMC-HVDC), able to accurately understand the operation characteristics of MMC-HVDC and the dynamic responds to the instruction of the control system.

Insulated vacuum switchgear and active switchgear elements therefor are provided with a rigid support structure mechanically isolating a vacuum insulator from axial loads in use without reinforcing or insulating encapsulations. At least one of the elastomeric insulating housing and the support structure directly contacts an outer surface of the insulator. Systems and methods for assembling the switchgear are also provided.

The invention discloses a three-station vacuum switch tube comprising a vacuum chamber, a fixed contact assembly, a moving contact assembly and a grounding contact, wherein the grounding contact comprises a grounding contact ring and a grounding terminal, wherein the grounding terminal is electrically connected with the grounding contact ring, and a moving contact is driven by an operating mechanism to take linear back-and-forth movement between a fixed contact and the grounding contact ring; and when the moving contact, the fixed contact and the grounding contact ring are all in off states, the tolerance electric field intensity between the moving contact and the fixed contact is higher than that between the moving contact or the fixed contact and the grounding contact ring. The invention realizes the switch-on, isolation and grounding three-station functions, also not only has the advantages of compact structure, reasonable design, advanced technology, current relative standard accordance, long electrical life and mechanical life, wide application range, high safety and reliability, and the like, but also realizes that electric breakdown firstly generates between a loading terminal and a grounding terminal once vacuum degree is reduced, enables the leakage currents and the short-circuit currents to flow into earth and ensures the safety of maintenance personnel who possibly mistakenly contact the loading terminal.

The invention discloses a full-automatic vacuum packaging machine which comprises a membrane releasing device, a printing device, a bag making device, a feeding device and a vacuum and sealing device connected in sequence. The vacuum and sealing device comprises a vacuum reciprocating mechanism, a vacuum switching mechanism, a bag receiving mechanism, a bag delivery mechanism, a traction mechanism, a sealing mechanism, a bag pressing and shaping mechanism, a bag clamp adjusting mechanism and a transfer belt separating mechanism. The vacuum reciprocating mechanism comprises a main box body capable of laterally moving and fixed side box bodies located on both sides of the main box body, and the main box body laterally moves to be combined with one side box body to form a vacuum chamber and simultaneously to be separated from another side box body to form an opened sealing station. The vacuum switching mechanism is used for vacuumizing and relieving the vacuum of the vacuum chamber and the sealing station. The bag receiving mechanism, the bag delivery mechanism, the traction mechanism, the sealing mechanism, the bag pressing and shaping mechanism, the bag clamp adjusting mechanism and the transfer belt separating mechanism are respectively located on both sides of the main box body. Packaging, inputting and outputting can be carried out at the same time, so that the efficiency is greatly increased.

An engine mount which is capable of changing its vibration transmission characteristics with a simple structure using an inexpensive actuator is provided. A partition is inserted to a side member to which a mount rubber (rubber vibration isolator) of the engine mount is spliced to close a space between the mount rubber and to create an air chamber. An air duct pipe which communicates with the air chamber is connected to the side member and is connected to a VSV (vacuum switching valve) via a connection pipe. The VSV is controlled to ON/OFF states based on a driving voltage Vout from an ECU which corresponds to explosive vibrations of the engine to switch pressure within the air chamber to negative pressure of a vacuum tank in which negative pressure of an intake manifold is accumulated or to atmospheric pressure, interlocking with the vibration of the engine. Thereby, the vibration transmission characteristics of the engine mount may be adequately changed and the vehicular vibration may be reduced significantly.

The invention discloses a solid insulated totally-enclosed ring main unit, which comprises at least a line of leading-in unit and at least a line of leading-out unit, and each line of switch comprises a 3-phase high-voltage vacuum switch unit. The high-voltage vacuum switch consists of a housing fixed inside a box body, and a main switch and an isolator arranged in the housing, wherein, the housing is made of epoxy resin, and a copper joint pin of the main switch and the outside of a busbar connected with the copper joint pin are coated with silicon rubber layers. The ring main unit of the invention adopts a totally enclosed design, which causes the ring main unit to have a smaller volume and compact structure, and to be safe and reliable; the probability of leakage and discharge is low, thus improving the insulation class, and the ring main unit has obvious effect on saving energy and materials; air, moisture, dust and hot and cool air sources are isolated, which effectively retards the corrosion of a power source body, stabilizes the output of source voltage, decreases the times of the device maintenance, reduces expense cost and prolongs the service life of the ring main unit.

The invention relates to a turnable vacuum chuck machine for lifting concrete segment and steel segment, which consists of a support bracket, a vacuum pump, a vacuum gauge, an electromagnetic valve, a turnable hollow sealing beam used as a gasholder and a plurality of vacuum chucks which are arranged on different positions of the hollow sealing beam with a hinge. When working, the whole chuck machine is hooked on a corresponding hoisting device through a wire rope and is attached to an external surface (which can be a plane surface or an arc surface) of the segment of the lifted object depending on the self gravity. The vacuum pump exhausts air in the hollow sealing beam driven by a self-bring motor through the electromagnetic valve to cause the sealing beam to generate certain vacuum; when operates the vacuum switch, the vacuum switch can be caused to be communicated with the vacuum in the hollow sealing beam through a gas source pipeline; the segment can be lifted by the negative difference of the vacuum and atmospheric pressure in the hollow sealing beam. When the lifted object segment needs to be turned, through a power transfer system which consists of a rack, a gear and a driving shaft driven by another motor, the lifted segment can wind around a rotational axis along the hollow sealing beam and arbitrarily turn in a required angle under the support bracket so as to be in favor of the storage and arrangement of the lifted segment. The turnable segment chuck machine adopts purely mechanical structure and has reliable suction crane as well as turns steadily. The invention can turn and stop in any angle with simple and flexible operation as well as convenient maintenance.

The invention relates to a silver alloy composite solder strip for a vacuum switch tube stainless steel and 95 percent alumina ceramic low-stress hermetic seal joint. The cross section of the composite solder strip has a three-layer overlapping structure of a solder alloy layer, a copper core layer and a solder alloy layer, wherein solder in the composite solder comprises the following compositions in percentage by mass: 55 to 72 percent of silver, 19.0 to 43.0 percent of copper and 0.50 to 4.50 percent of nickel; the melting temperature of the solder is between 780 and 835 DEG C, and the hermetic seal temperature is between 820 and 850 DEG C; the unilateral thickness of the solder alloy layer in the composite solder is between 0.08 and 0.20 millimeter; the copper core layer in the composite solder is copper with the purity of more than or equal to 99.95 percent or oxygen free copper; the interlayer composite proportion of the composite solder, namely the thickness of the solder layer to the thickness of the copper core layer to the thickness of the solder layer, is 1:X:1 (wherein, X is between 1.8 and 3.5); and firm metallurgical combination is formed between various layers. The intensity of the vacuum switch tube stainless steel and 95 percent alumina ceramic joint is more than or equal to 90 MPa, and the leakage rate of the joint is less than or equal to 1*10Pa.m/s.

The related over-voltage protector for high-power motor comprises: three ZnO arresters with cathode paralleled together and connected to ground terminal and anode connected to three-phase terminal, three groups of R-C devices with two ends connected to ground terminal and arrester another end respectively. This invention can reduce damage rate of high-power motor and transformer to 2%.

The invention relates to a cu-cr-copper composite contact material and the method for making the material, the cu-cr-copper composite contact material mainly comprises a cu-cr layer, a layer of copper is compounded on at least one surface of the cu-cr layer, and the thickness of the cu-cr layer is 1.5-2.5mm, the thickness of the copper layer is 1.5-4.5mm, and the total thickness of the cu-cr layer and the copper layer can be arbitrarily controlled between 3.0-7.0mm according to the requirements. The making method comprises the following steps: firstly, preparing powder materials of the cu-cr layer, secondly, preparing powder materials for the copper layer, thirdly, pressing composite materials, fourthly, carrying out the sintering, the repressing and the after-burning. The manufacturing method has the following technical effects: firstly, the thickness of the cu-cr layer is greatly reduced, the inner electric resistance of the contact material is effectively reduced, and the performance of a vacuum switch tube is improved, secondly, the difficulty of the welding technique of the copper layer and a conducting bar is reduced, the welding is easy and the quality is reliable, thirdly, the dosage of chromium is reduced, thereby the cost of raw materials for manufacturing the contact materials is reduced, fourthly, common silver-copper solder can be directly used, one time sealing and exhausting can be realized and the manufacturing cost of the vacuum switch tube can be greatly reduced.

A shorting switch (2) includes a vacuum switch (4) having fixed and movable contact assemblies (8, 10) and a driven member (26). A spring cover tube (38) and bushing (36) mount the driven member (26) for linear movement along a path substantially parallel to a longitudinal axis of the movable contact assembly (10). The driven member (26) moves the movable contact assembly (10) between open and closed circuit positions. A compression spring (40) has a compressed state and a released state, which moves the driven member (26) and movable contact assembly (10) to the closed circuit position. A release bolt (32) has an opening (68) therein and is coupled to the driven member (26) to normally maintain the compression spring (40) in the compressed state. A charge (60) is disposed in the opening of the release bolt (32) and is actuated to fracture the release bolt and release the compression spring (40) to the released state. First and second terminals (16, 22) are respectively electrically interconnected with the fixed and movable contact assemblies (8, 10).

A flexible shunt in the form of a flexible member made up of a stack of electrically conductive laminations each of a thickness of no more than about 0.002 inch (0.051 mm) has a moveable end secured by a moveable mount to a moveable contact support of an electric power switch for movement along a linear path. A fixed mount secures the fixed end of the flexible member to a fixed conductor termination spaced laterally from the moveable end along a neutral axis perpendicular to the linear path of the moveable end by an offset distance such that the installed length of the intermediate section between the fixed and moveable ends is less than the free length of the intermediate section. With this arrangement the stroke of the moveable end along the linear path can be up to at least ⅓ and even ½ of the free length of the intermediate section of the flexible member and with very low operating forces.

A fault current limiter based on a fast switch and a triggered vacuum switch is disclosed, which comprises a fast switch (1) and a current limiting resistor (2) which are connected in parallel, wherein, a first pulse capacitor (3), a first inductor (4) and a first triggered vacuum switch (5) are connected in series between two ends of the fast switch (1); a second pulse capacitor (6), a second inductor (7) and a second triggered vacuum switch (8) are connected in series between two ends of the current limiting resistor (2). The invention: 1) enables short circuit current to be incapable of reaching a first current peak value in a state of infinite current; 2) causes arc current of the fast switch to achieve fast zero crossing and then arc blowout; 3) can pass through large pulse current at high triggering speed and can achieve arc blowout at the time of the zero crossing of the pulse current; 4) can rapidly inhibit the short circuit current; 5) and automatically limits current subsequent to the short circuit of a system to ensure quality of power supply and save establishment expenditure of network.

The invention provides a solid insulating vacuum ring network cabinet comprising at least one wire inlet ring network cabinet and at least one wire outlet ring network cabinet, wherein the wire inlet ring network cabinet is assembled on a cabinet body by a vacuum switch unit through screws so as to form the whole wire inlet ring main unit; the wire outlet ring network cabinet is formed by assembling the vacuum switch unit and a fuse tripping interlocking device on the cabinet body through screws; a fuse cylinder component is arranged at the position in the vacuum switch unit at which a polar column assembling plug is securely sealed. The solid insulating vacuum ring network cabinet has the advantages that harmful substances are not generated during the working process; furthermore, all parts can be reclaimed after achieving the service life; and the environment-friendly requirement is adapted. All charged bodies are placed or arranged in epoxy resin; the electric performance of the ring network cabinet is not affected by external environments such as vapor, dust and the like; and the maintenance quantity is little and the service life is long. As charged bodies are all arranged inthe epoxy resin, semiconductor substance is sprayed outside the epoxy resin; and the induction voltage is grounded; therefore, even when a user contacts with the ring network cabinet, the electric shock accident does not occur, and the safety of equipment is improved.

A vacuum switching device with pre-insertion contact arrangement is disclosed. The vacuum switch includes first and second contact systems. The first contact system includes an annular stationary contact and an annular moving contact retained on a moving contact drive rod. A second contact system includes a moving contact retained on an end of the moving contact drive rod and a floating contact retained along the same axis as the second moving contact. Both contact systems are enclosed in a vacuum envelope. A mechanical adjustment system is provided for the floating contact, which allows it to be positioned so that the secondary moving contact and floating moving contact may engage at a set interval before the annular moving contact engages the annular stationary contact. A resistor or inductor is connected between the second contact system and a load to prevent a current in-rush into the load.

A system for filing or discharging compressed gas or liquid cylinders mounted on the cylinder. An automatic system for filing or discharging a compressed gas cylinder, specifically chlorine, sulfur dioxide, or ammonia cylinders. The system includes an electric motor that rotates the cylinder valve system toward open or closed position without interfering with or requiring additional adapters for the filing or discharge hardware. The motor, gears, and controls are assembled as one unit to eliminate the necessity for a separate control panel or interconnecting control wires. The system has the capabilities for integral leak detection with automatic shutdown, battery backup in the event of power failure, remote control by leak detector, remote control panic button, remote low weight transmitter, remote vacuum switch for automatic switch-over systems and other remote digital signals. The system requires only a flexible power cord for trickle charge of the battery backup, which makes the assembly totally portable when not in use. Placement of the system container can be accomplished by connection to the cylinder valve, a permanent stand, or a movable stand on casters. Motor and controls are accomplished through an on-board microprocessor with integral LED displays for "C<SMALLCAPS>LOSED</SMALLCAPS>," "A<SMALLCAPS>LIGN</SMALLCAPS>," and "O<SMALLCAPS>PEN</SMALLCAPS>" indicators. Programming is accomplished through an integral keypad. Actual valve position is transmitted to the microprocessor from a direct-coupled potentiometer.

The invention discloses a laser triggered vacuum, which comprises an airtight shell, a first electrode, a second electrode and a laser irradiation window, wherein the first electrode and the second electrode are arranged on the airtight shell and are respectively fixed on both ends of the airtight shell, the second electrode is internally and axially provided with a through hole, one end face of the first electrode is provided with a target electrode opposite to the through hole, the laser irradiation window is positioned on the outer end of the second electrode, and the laser irradiation window, the through hole and the target electrode are positioned on same axis. The laser triggered vacuum switch has simple structure, stable triggering property, long service life and convenient processing.

A hybrid high-voltage or medium-voltage breaker device includes an enclosure filled with a dielectric gas, a vacuum switch, a gas switch and an operating rod. The vacuum switch includes a fixed first arc contact and a second arc contact which can move in translation in an axial direction of the enclosure. The gas switch includes a fixed or quasi-fixed third arc contact and a fourth arc contact which can move in translation. The operating rod is connected to the fourth contact. The device also includes a connection arrangement for electrically connecting the second and third contacts and a displacement arrangement connected to the connection arrangement and to the rod which separates the second and fourth contacts from the first and third contacts, respectively.