44results about How to "Small loop resistance" patented technology

The invention provides a high voltage isolation switch which comprises two insulation pillars which are vertically fixed on an installation plate. The two insulation pillars are fixed with a moving contact and a static contact respectively, the static contact is hinged with an isolator, and another end of the isolator is in overlapping joint with the moving contact, wherein the moving contact and a corresponding binding post are one-piece shaping, the static contact and a corresponding binding post are one-piece shaping, contact between the isolator and the moving contact is a surface to surface contact mode, and conductive connection is realized to reduce loop resistance of the whole isolation switch. Peripheral of the insulation pillar is provided with a parachute cluster which enlarges gradually from one end to another end of the insulation pillar, a screw is pivoted on the static contact, and the screw is sleeved with a disk spring set which presses against the isolator. Since employing the above structure, conduction performance of the high voltage isolation switch is improved, whole loop resistance is substantially reduced to 45-50 micro Omegas, and security and reliability in working are improved.

The invention discloses a protecting structure for a vacuum air extinguish chamber corrugated pipe under high gas pressure and application. The protecting structure comprises a hollow metal drum and a corrugated pipe outside sealing device, the hollow metal barrel is arranged at the end, positioned outside a vacuum arc extinguish chamber movable end cap, of a vacuum arc extinguish chamber movable electroconductive rod, one end of the corrugated pipe outside sealing device is arranged on the lower portion of the vacuum arc extinguish chamber movable end cap while the other end of the same is arranged outside the circumference of the hollow metal barrel, the hollow metal barrel and the vacuum arc extinguish chamber movable electroconductive rod are in welded sealing, the hollow metal barrel and the corrugated pipe outside sealing device are in direct-acting reciprocating sealing, and the corrugated pipe outside sealing device and the vacuum arc extinguish chamber movable end cap are in fixed gas sealing. By adopting magnetofluid direct-acting reciprocating sealing technology, a closed space can be formed among the inside of the vacuum arc extinguish chamber corrugated pipe, the lower portion of the vacuum arc extinguish chamber movable end cap and the movable electroconductive rod, and no high-pressure gas exists inside the closed space, so that difference of air pressure inside and outside the corrugated pipe is reduced, and breakage failure probability of the corrugated pipe can be lowered effectively.

The invention provides a battery protection circuit, and the circuit comprises a battery pack, a BMS main control unit, a first discharge MOS tube, a controllable switch, a positive end, and a negative end. The first discharge MOS tube and the battery pack are connected between the positive end and the negative end in a series manner, and the first discharge MOS tube is used for controlling the on/off of an output current of the battery pack. Two ends of the controllable switch are connected between the positive end and the negative end, and a series circuit which is formed by the battery pack and the first discharge MOS tube is connected with the controllable switch in a parallel manner. The BMS main control unit comprises a control module and a detection module, wherein the detection module is used for detecting the state information of the battery pack and transmitting the state information to the control module, and the control module is connected with the first discharge MOS tube and the controllable switch. The circuit provided by the invention aims at solving problems that a conventional battery protection circuit is large in loop resistance, is large in power consumption and is poor in reversibility of a secondary protection circuit.

The invention discloses a switch cabinet and an incoming and outgoing line function module thereof. The incoming and outgoing line function module comprises a conducting core with an axis extending linearly and a core-penetrating type mutual inductor sleeved on the periphery of the conducting core, the front end and the rear end of the conducting core are respectively provided with a first connection structure and a second connection structure which are serially connected on a main loop of the switch cabinet, the conducting core and the mutual inductor are solidified into a whole through an insulator casted on the outsides thereof, and the surface of the insulator is provided with adaptation holes which are corresponding to the first connection structure and second connection structure respectively and used for leading in an external conductor for conducting electricity and leading out an external conductor for conducting electricity. The core-penetrating type mutual inductor with the conducting core penetrating from the center is adopted in the incoming and outgoing line function module, and is casted into a whole through epoxy resin to form the incoming and outgoing line function module with a CT, space of a cabinet body is effectively utilized by the arrangement, and height of the cabinet body is decreased.

The invention discloses a contact of a transverse magnetic field of a novel vacuum arc-extinguishing chamber. The contact comprises a first conducting rod, a first contact piece, a second contact piece and a second conducting rod, wherein one end of the first conducting rod is arranged at one end of a first contact end, the other end of the first conducting rod is a protruding end and is opposite to an opening direction of the first contact piece; one end of the second conducting rod is arranged at one end of a second contact end, the other end of the second conducting rod is a protruding end and is identical to an opening direction of the second contact piece; when the contact is closed, another end of the first contact end is in contact with another end of the second contact end and bears pre-compression when the contact is closed. The contact provided by the invention has the following advantages: 1, the area of the contact can be obviously improved at certain diameter of the contact, so as to improve the cut-off capacity of a breaker; 2, a radial outward opening distance of the contact can be controlled to be smaller under certain travel, so as to be beneficial for an expansion movement of an initial arc to be tend to be radially outward; 3, a tangent relative movement between movable and static contacts can be generated to prevent the contact from being partially ablated.

The invention discloses a roll-to-roll capacitive touch screen sensor. The roll-to-roll capacitive touch screen sensor comprise a substrate, a first electrode, a second electrode, third electrodes, adisapparation protection layer and an OCA optical adhesive layer, wherein the first electrode is arranged at the middle part of the upper surface of the substrate; the second electrode is arranged onthe upper surface of the substrate and at the periphery of the first electrode; the second electrode comprises a second electrode body and second electrode leads; the third electrodes cover the secondelectrode leads; the disapparation protection layer covers the upper surface of the first electrode and the parts, except the surface covered by the third electrodes, of the second electrode; and theOCA optical adhesive layer covers the first electrode, the second electrode, the third electrodes and the disapparation protection layer. The invention furthermore discloses a preparation method of the roll-to-roll capacitive touch screen sensor. The touch screen sensor has the characteristics of being low in resistance, good in electric conductivity, low in production cost and excellent in buckling performance. The preparation method has the characteristics of being simple in process, high in production efficiency, good in product performance stability and high in yield.

The invention belongs to the technical field of surface treatment of medical equipment and relates to a stainless steel matte finishing process. The primary technical scheme is as follows: the stainless steel matte finishing process comprises the following steps: placing a deoiled stainless steel workpiece and the anode of a power supply connected in an anodizing matte finishing solution of a mixture containing 10-50 g/L H3PO4, 10-30 g/L C6H8O7, 100-300 g/L H2O2 and 0.4-1 g/L K2SO4; heating the solution to 60-80 DEG C and connecting a platinum and titanium net to the cathode of a direct current power supply, wherein the area ratio of the platinum and titanium net and the cathode of the direct current power supply is 1: 1; and keeping the distance between the cathode and the anode at 6.0 cm, carrying out anodizing for 30-60 min under the condition that the current density is 3.4-6.8 A/dm<2> and the working voltage is 9.4-10.5 V, wherein the surface of stainless steel workpiece is matteand has silver metal gloss, the hardness of the stainless steel is improved, and the pitting corrosion resistance is improved. The stainless steel matte finishing process provided by the invention notonly can solve the environmental problem that an existing stainless steel matte finishing solution contains harmful substances and strong acids, but also can solve the problem that the dissolving speed of the environment-friendly solution is low, thereby providing a new path for development of stainless steel matte technical treatment.

The invention relates to a fixedly-sealed polar column with an anomalous soft connection. The fixedly-sealed polar column comprises a vacuum extinction chamber which is arranged inside the fixedly-sealed polar column; the upper end of a movable end is arranged inside the vacuum extinction chamber; the lower end of the movable end, which goes out of the vacuum extinction chamber, is connected with one end of the anomalous soft connection; the lower side of one end of the anomalous soft connection is connected with an insulating tension rod; the other end of the anomalous soft connection is integrally connected with a lower line outlet seat through a screw; the lower end of the movable end is in an external taper shape and the connection part of the anomalous soft connection with the lower end of the movable end is in the shape of a column with an internal taper; the connection part where the other end of the anomalous soft connection is connected with the lower line outlet seat through the screw is in the shape of a binding face; and a thread through hole is arranged on the binding face and the screw extends from a through hole of the lower line outlet seat to the thread through hole. The fixedly-sealed polar column provided by the invention has the beneficial effects that the contact area between the movable end of the extinction chamber and the soft connection is enlarged, the flow rate is increased, the loop resistance is easy to reduce, fewer parts are mounted and the design is simpler than that of sliding connection.

The invention relates to the field of polycrystalline silicon production equipment, and discloses an electric leakage detection system and a polycrystalline silicon reduction furnace. The electric leakage detection system comprises a grounding wire and a current differential detection module, wherein the current differential detection module can detect an amplitude change rate of leakage current in the grounding wire, so that whether the type of a grounding short-circuit fault in the reduction furnace belongs to a circuit short caused by dust accumulation or silicon junction at an electrode orfalling of silicon rods according to a detection result of the current differential detection module, thereby deciding whether to shut down the furnace to process or continue to operate according toactual conditions, and reducing the great economic loss caused by shutdown of the furnace due to misjudgment. The polycrystalline silicon reduction furnace disclosed by the invention is provided withthe electric leakage detection system, and the furnace wall of a furnace body of the polycrystalline silicon reduction furnace is grounded through the grounding wire, thereby being convenient for technicians to judge the short-circuit type in the reduction furnace.

The invention relates to a vacuum switching tube for a protective circuit breaker of a generator outlet, solving the problem that the conventional vacuum switching tube has low surface utilization rate and small capacity and can not satisfy great current breaking requirement. The vacuum switching tube for a protective circuit breaker of a generator outlet comprises a guiding sleeve, ceramic insulated shells, a composite shielded sleeve, a movable end pipe core, a static end pipe core and a protective cap, wherein the ceramic insulated shell is respectively connected with the movable end pipe core and the static end pipe core by kovars; the composite shielded sleeve is connected with the ceramic insulated shells at both ends; and the contact combinations of the movable end pipe core and the static end pipe core are corresponding to each other. The vacuum switching tube for a protective circuit breaker of a generator outlet is characterized in that either contact combination is in arc-distributed electrode structure and respectively comprises a cup seat, a supporting disk, a magnetism-concentrating column, a contact body and an oxygen-free copper tray; the composite shielded sleeve comprises an arc absorption inner layer and a magnetic shielded outer layer; and the surface of a static conductive rod is provided with radiation grooves. The invention has the advantages of reasonable structure, strong current breaking and closing capabilities, small loop resistance, uniform electrode surface combustion, high surface utilization rate and strong radiation capability.

The invention relates to a novel vacuum circuit breaker with a fixedly encapsulated pole. The vacuum circuit breaker comprises a vacuum arc-extinguishing chamber (1), an upper contact arm (2) and a lower contact arm (3) and is characterized in that the vacuum arc-extinguishing chamber and the upper contact arm (2) are fixedly encapsulated. The novel vacuum circuit breaker with the fixedly encapsulated pole adopts a high performance epoxy resin material, utilizes the automatic pressure gel (APG) process to fixedly encapsulate the vacuum arc-extinguishment chamber, the upper contact arm and the lower contact arm, is suitable for working environment with large sand, dryness, plateau highness and coldness, moisture, foul, underground and power stations, simultaneously reduces oxidation of conductive parts of the circuit breaker, reduces circuit resistance and improves main circuit connection reliability. Experiments prove that mechanical service life can reach 30000 times.

The invention discloses a novel conductor connector which comprises a straight conductor. One end of the straight conductor is provided with a connecting flange, four installing holes are arranged on the connecting flange, a circular protrusion face is arranged in the middle of the outer end of the connecting flange, the section of a section from the middle of the straight conductor to the connecting flange is quincunx-shaped, and a single-end connector, a double-end connector or a three-end connector are arranged at the other end of the straight conductor. The novel conductor connector is connected with an insulation piece through a bolt directly through the connecting flange, a quincunx-shaped structure has a shielding effect, and shielding covers are reduced. Only one contact face is arranged in connection, and return circuit resistance is reduced. In addition, the conductor connector is simple in structure, easy to machine and manufacture and low in manufacture cost.

The invention discloses a rapid box type single-pole vacuum contactor which comprises an insulation shell, a vacuum switching tube, two electric connection terminals, an insulation pull rod, a lever, an opening mechanism and a closing mechanism, wherein the vacuum switching tube is arranged in the shell, the two electric connection terminals are arranged on the shell and connected with two electrodes of the vacuum switching tube respectively, the insulation pull rod is arranged in the shell and connected with a moving contact of the vacuum switching tube, the lever is used for driving the insulation pull rod to perform opening and closing actions, the opening mechanism is used for driving the lever to perform the opening action, and the closing mechanism is used for driving the lever to perform the closing action. The closing mechanism comprises a driving lever and a closing driving rod, wherein the driving lever is rotatably arranged in the shell and used for driving the lever to rotate, the closing driving rod is used for driving the driving lever to rotate, and the end, far away from the driving lever, of the closing driving rod extends out of the shell to be served as a manual closing button; the opening mechanism comprises an electromagnetic tripping mechanism and an opening driving rod, wherein the electromagnetic tripping mechanism is arranged in the shell and used for driving the lever to rotate, the opening driving rod is used for triggering the electromagnetic tripping mechanism to work, and the outer side end of the opening driving rod extends out of the shell to be served as a manual opening button. The rapid box type single-pole vacuum contactor is high in closing speed and capable of meeting the requirements of grid-connected power generation of novel electricity equipment.