1390results about How to "Easy to disassemble and repair" patented technology

The invention discloses a hydraulic reversing mechanism. The hydraulic reversing mechanism comprises an upper joint, a center shaft, a guide ring, an upper shell, a guide pin, a connection nipple, a compression spring, a lower shell, a limiting sleeve and a lower joint, wherein the upper joint is connected with the center shaft, the guide ring is arranged between the upper joint and the upper shell, and the upper shell, the connection nipple, the lower shell and the lower joint can be slidably arranged on the outer side of the center shaft. The guide pin is arranged on the upper shell, a guidegroove is formed in the portion, corresponding to the guide pin, of the center shaft, the guide pin can rotate in the guide groove, a compression cavity is defined by the connection nipple, the lowershell, the lower joint and the center shaft, and the compression spring and the limiting sleeve are arranged in the compression cavity. The hydraulic reversing mechanism has the benefits that the hydraulic reversing mechanism can be used for rotational reversing of a sand washing tool, the washing operation is more sufficient, no atomization is generated, and the washing capacity is ensured. According to the hydraulic reversing mechanism, reversing is achieved under the hydraulic action, the structure is simple, and convenience is brought to installation, disassembly and maintenance. The large-discharge-capacity cleaning work can be met, and rotary jetting to the washing tool can be achieved.

The invention discloses a light-emitting diode (LED) fluorescent lamp tube which comprises a lamp tube body (2) and plugs (4) installed at two ends of the lamp tube body (2) and used for being connected with a power source. The LED fluorescent lamp tube is characterized in that 4-6 magnetic blocks (6) are arranged on the surfaces of two ends of the lamp tube body (2) at uniform intervals along the circumference of the lamp tube body (2), grooves (8) corresponding to the magnetic blocks (6) are arranged inside the plugs (4) along inner walls of the circumferences of the plugs (4), and the surfaces of the grooves (8) are made of iron skin. The LED fluorescent lamp tube has the advantages of being simple in structure and easy to dismantle and maintain.

The invention provides an indoor unit of a vertical air conditioner. The indoor unit comprises a machine shell, a heat exchanger, a first cross flow fan and a second cross flow fan; the heat exchange is arranged in the machine shell; the first cross flow fan and the second cross flow fan are arranged up and down in the machine shell, vertically extend along an axis and are arranged collinearly; the machine shell comprises a framework, a bottom plate, a front upright post, a rear upright post, a left upright post, a right upright post and a shell; the framework is used for mounting the heat exchanger, the first cross flow fan and the second cross flow fan; the bottom plate is arranged below the framework and is used for supporting the indoor unit of the vertical air conditioner; the front upright post and the rear upright post respectively extends upwards from the front and rear sides of the bottom plate to the bottom end of the framework to support the framework; the left upright post and the right upright post respectively extend upwards from the left and right sides of the bottom plate to the top end of the framework to fix the framework; and the shell surrounds the outer side of the framework, the lower end of the shell extends to the edge of the bottom plate, a plurality of air outlets are formed in the front side of the shell, and an air inlet is formed in the rear side of the shell. The indoor unit of the vertical air conditioner, provided by the invention, is relatively low in fan air pressure loss and capable of saving more energy during operation and has various air supply modes, so that the user experience is improved.

A toner cartridge includes: a toner container for containing a toner, the toner container being removably mounted in an image forming apparatus; and a storage section for electronically storing specific information held by the toner container, the storage section being electrically connected to a to-be-connected portion of the image forming apparatus when the toner container is mounted in the image forming apparatus, the storage section comprising: a board assembly including a board on which a storage element for storing the specific information held by the toner container as electronic information is mounted; a housing member for holding the board assembly; and a covering member for detachably integrating the board assembly and the housing member, the storage section being attachable to and removable from the toner container.

The invention relates to a hot-redundancy CAN (Controller Area Network)-bus high-fault-tolerance control terminal and method based on dual DSPs (Digital Signal Processors), belonging to the field of automation and control. The terminal and the method are used for solving the problems of control failure, data loss, transmission timeout and the like easily caused due to the fact that control terminals of existing distributed control systems mostly adopt cold backup and the problem that the existing fault tolerance mechanism is not perfect enough. The terminal comprises a digital-analog I / O (Input / Output) board and a dual-redundancy DSP control board, wherein the dual-redundancy DSP control board comprises a master DSP, a slave DSP, a first CAN transceiving module, a second CAN transceiving module, a third CAN transceiving module and a fourth CAN transceiving module, the digital-analog I / O board comprises a power supply module, an ADC (Analog to Digital Converter) module, a first RS232 (Recommended Standard 232) communication module, a second RS232 communication module, a CPLD (Complex Programmable Logic Device), a PWM (Pulse Width Modulation) module and a PWM filtering and self-inspection module, the master DSP and the slave DSP form redundancy, and the failure of controllers is solved by two manners comprising self inspection and mutual inspection.

The precise multifunctional incremental pressing die includes a lower die, an upper die, an internal guiding mechanism and an outer guiding mechanism. The upper die includes an upper die seat, a convex die back plate, an unloading back plate, and an unloading plate. The lower die includes a lower die seat, a concave back plate and a concave die plate. The outer guiding mechanism includes a large guide pin, a large ball sleeve, a large guide sleeve and a spring. The internal guiding mechanism includes a small guide pin, a small ball sleeve, a small guide sleeve and a spring. The making process features that the unloading plate and the concave die plate are fastened together.

The invention discloses an automatic ultrasonic flaw detector and aims at overcoming the problem that the existing device probe is incapable of moving automatically so that three-dimensional and automatic flaw detection is difficult to realize. A first longitudinal guide rail and a second longitudinal guide rail of the guide rail part of the automatic ultrasonic flaw detector are fixed in parallel at the two sides of the bottom panel of a guide rail shell in the longitudinal direction; the two ends of a transverse guide rail are fixedly on the sliders of the first longitudinal guide rail and the second longitudinal guide rail, respectively, and the transverse guide rail is perpendicular to the direction of the first longitudinal guide rail; the probe part of the automatic ultrasonic flaw detector is fixed on the slider of the transverse guide rail and electrically connected with a data transmitting / receiving circuit part; the transverse front slide rail and the transverse rear slide rail of a fixture part are mounted in parallel on the guide rail shell, a longitudinal left slide rail and a longitudinal right slide rail are mounted in parallel on the transverse front slide rail and the transverse rear slide rail, a first clamp and a second clamp are mounted on the longitudinal left slide rail, a third clamp and a fourth clamp are mounted on the longitudinal right slide rail; the data transmitting / receiving circuit part is electrically connected with a data processing part.

The invention discloses an injection pump. The injection pump comprises a housing, a transmission device, a driving device, a circuit board module and a battery module, wherein the housing comprises a rear housing and a middle board, and the middle board is fixed at the opening end of the rear housing. The closing end of the rear housing is depressed towards the direction of the opening end to form a battery bin for containing the battery module. The transmission device is in a long strip shape and is horizontally fixed on the middle board. The driving device is connected with the transmission device and located between the transmission device and the battery module. The whole of the driving device and the battery module are arranged in the length direction of the transmission device with the circuit board module to facilitate that the circuit board module in electrical connection with the driving device and the battery module at the same time, wires inside are arranged conveniently, and the structure is compact. The circuit board module is fixedly connected with the middle board and located between the transmission device and the closing end of the rear housing. The driving device, the transmission device and the circuit board module are all connected with the middle board to form a whole, the middle board is fixedly connected with the rear housing, and the injection pump is convenient to assemble. All the parts in the housing can be revealed after the rear housing is dismantled, and the injection pump is convenient to dismantle and maintain.

The invention discloses an electric wheelbarrow structure. A control mainboard is arranged in a groove which is formed in a plastic casing which is arranged on one side; the control mainboard is fixed through an integral part of a silicone gel protective cushion and a cover plate; the battery is arranged in a groove which is formed in a plastic casing which is arranged on the other side; the battery is fixed through the integral part of the silicone gel protective cushion and the cover plate. The electric wheelbarrow structure enables the assembling efficiency of the electric wheelbarrow to be improved and is convenient for daily maintenance and disassembling maintenance.

The invention relates to a megawatt ten-shunt wind power generation speed increasing box, which relates to the technical field of wind power generation speed increase and is a fixed shaft type multi-shunt speed increasing box using a fixed shaft driving theory as a basis and a moving shaft planet structure as a framework. The speed increasing box comprises a machine base, an input shaft, a ring gear, a duplex gear, a sun gear and a third stage speed increasing gear pair, and is characterized in that two intermediate gears are arranged between a center shaft gear of the duplex gear and the ring gear, and five shunts are divided between a driving gear and a center shaft gear sleeve, thus (2*5) ten shunts are formed. The megawatt ten-shunt wind power generation speed increasing box has the following advantages that: (1) the weight is 35 to 45 percent lighter than that of the prior product, and the shape is reduced by 40 to 50 percent; (2) a single piece is light and is convenient to assemble, disassemble and maintain; and (3) a gear slotting machine and a gear grinding machine made in China can process 5 MW model gears, and thus the manufacturing cost is greatly reduced.

The invention relates to the technical field of bamboo and wood machining, in particular to bamboo stick clamping and drilling equipment for bamboo straw manufacturing. The equipment comprises a conveying device, a clamping device and a drilling device which are arranged on a rack, wherein the conveying device is arranged on one side of the clamping device and used for conveying a bamboo stick tothe clamping device, and the drilling device is used for drilling the bamboo stick clamped by the clamping device. According to the bamboo stick clamping and drilling equipment for bamboo straw manufacturing, the machining efficiency of the bamboo straw is greatly improved, and the equipment is simple in mechanism and easy to disassemble and maintain; the formed bamboo stick can be directly drilled, and compared with a traditional bamboo straw manufacturing mode, the efficiency is higher; and through the straightening and fixing effect of a taper sleeve and a clamping roller on the bamboo stick, the bamboo stick is always in a rotating state in the drilling process, it is guaranteed that a drill bit advances straightly in the bamboo stick, the problem that the drill bit drills through thebamboo stick due to the insufficient straightness of the bamboo stick or the structure of a sunny side and a nightside is avoided, and the yield of bamboo straw machining is greatly increased.

A brush seal assembly which includes a brush seal which is bristle hoop positioned between two plates. A segmented ring is positioned in contact with the brush seal and provides a uniform clamping force against the seal to hold it in place within a support member.

A brush seal assembly which includes a brush seal which is bristle hoop positioned between two plates. A segmented ring is positioned in contact with the brush seal and provides a uniform clamping force against the seal to hold it in place within a support member.

The invention relates to a pipe casting centrifuge machine by a thermodyn process, which comprises an equivalently casting device, a centrifugal host, a pushing pipe device, a pipe supporting device and a pipe connecting device. The frame of the equivalently casting device is fixed with a ladle fixing frame and a pouring ladle with a long pouring channel, and the ladle fixing frame is fixed with a same-speed board; the support wheel groups of centrifugal host are driven by a motor and support pipe die; the supporting frame of the pushing pipe device fixes a pushing rod through a guide rail, and the pushing rod is driven by a motor through pin teeth transmission for the pipe rough breaking away from the pipe die and cleaning inner wall of the pipe die and coating the inner wall of the pipe die; the pipe supporting device ensures the separation of the steel pipe from the pipe die; the pipe connecting device is used for connecting the pipe rough separated from the pipe pushing device. The pipe casting centrifuge machine of the invention can obtain the hollow steel pipe with good structure, precise size and high output rate of material and realizes whole machine automatic production.

The invention provides a hidden handle of a refrigerator door body and a refrigerator, which can solve the problem that the exposed handle is not beautiful and can be stained easily in the prior art. The hidden handle of a refrigerator door body is installed on the door shell of a refrigerator door body; the door shell is provided with a handle open slot; the hidden handle comprises a handle box and a handle panel assembly installed in the handle box; the handle box is installed in the handle open slot; the handle pane assembly comprises a panel and a shaft seat, wherein the panel is used for covering the mouth of the handle box; the shaft seat is installed on the back of the panel; a connecting shaft is arranged on the shaft seat in a penetrating manner and is sheathed with a spring; one end of the spring butts against the back of the panel; and the other end of the spring is connected with the shaft seat. According to the invention, the door body handle is hidden on the door shell of the refrigerator door body, is not exposed to the outside, has beautiful appearance and has small possibility of accumulating dust, thereby ensuring that the refrigerator body can be cleanly used. Meanwhile, each part of the hidden handle is installed in a buckling mode, is convenient to disassemble and maintain, and does not affect refrigerator appearance.

In order to solve the defect of low inspection precision of the printing material quality online visual inspection device, the invention provides a printing material quality online visual inspection system. An inspection machine box and an inspection assembly arranged on the inspection machine box are arranged in a small space formed by a printing cylinder, a transmission link, series inking rollers and an ink delivering roller which are arranged in the printer; one end of the inspection machine box, which is close to the printing cylinder, is provided with a slit which faces to the surface of the printing cylinder and is parallel to the rotating shaft of the printing cylinder; a light source assembly is positioned on one end, which is close to the printing cylinder, of the inspection machine box; a linear array cameral assembly is positioned on one end, which is far away the printing cylinder, of the inspection machine box, and shoots the picture of the printing material on the printing cylinder through the slit; and a coder is arranged on the rotating shaft of the printing cylinder. The invention can perform online inspection for the printing material on the printing cylinder, not only has high inspection precision, but also has smart design and small size, can not occupy additional space, and is suitable for the online inspection for special printing material and common printing material.

The invention discloses an automatic assembly device of a breaker terminal screw. The device comprises a bench. The device is characterized in that a rotary disk which is driven by a rotary disk drive device to rotate, a terminal feeding device, a screw matching detection device, a screwing back device and a qualified product unloading device are installed on the bench, the terminal feeding device, the screw matching detection device, the screwing back device and the qualified product unloading device are arranged on four stations on the periphery of the rotary disk along the rotary direction of the rotary disk sequentially, at least one terminal positioning hole which rotates through the rotary disk and corresponds to the devices on the stations is arranged on the rotary disk, a screw feeding device and a defective product unloading device which correspond to the screw matching detection device are arranged on the bench, and all devices are connected to a Programmable Logic Controller (PLC). By the aid of the device, the assembly of the breaker terminal screw can be completed automatically, defective products can be removed, the production efficiency is improved effectively, the labor cost is reduced and the assembly quality of the breaker terminal screw is stable and reliable.

The invention belongs to the technical field of construction of exterior walls of structure buildings, and relates to a structure-integrated heat-insulation and decorating exterior formwork and an exterior wall constructing method thereof. The structure-integrated heat-insulation and decorating exterior formwork comprises a heat-insulation structure layer, a decorating structure layer and lateral connecting plates, wherein the inner side surface of the heat-insulation structure layer is used as an outer side formwork surface during pouring of a concrete structure; at least one anchoring groove and / or at least one anchoring hole are formed in the inner side surface of the heat-insulation structure layer corresponding to the concrete structure; the decorating structure layer is arranged on the outer side of the heat-insulation structure layer; and the lateral connecting plates are connected to the peripheral side surfaces of the heat-insulation structure layer and the decorating structure layer. The structure-integrated heat-insulation and decorating exterior formwork can become an exterior formwork having an integrated structure; after pouring of the concrete structure is finished, forms do not need to be disassembled, and the construction efficiency and convenience of construction are greatly improved; and moreover, the anchoring grooves or / and anchoring holes are formed in the structure heat-insulation layer, and therefore, the structure heat-insulation layer, the decorating structure layer and the concrete structure are integrated.

The invention discloses a lose-in-weigh continuous weighing-metering feeding system. The lose-in-weigh continuous weighing-metering feeding system comprises a raw material bin II, a raw material bin I, a lose-in-weigh single-screw metering feeding machine, a lose-in-weigh double-screw metering feeding machine, a forcible side feeding machine and a lose-in-weigh liquid metering feeding machine, wherein the lose-in-weigh single-screw metering feeding machine comprises a weighing hopper II, a single-screw spherical feeding body, a single-screw feeding barrel and a weighing sensor II; the lose-in-weigh double-screw metering feeding machine comprises a weighing hopper I, a double-screw spherical feeding body, a double-screw feeding barrel and a weighing sensor I; the forcible side feeding machine comprises a side feeding barrel; and the lose-in-weigh liquid metering feeding machine comprises a liquid raw material bin, a weighing hopper III, a liquid metering pump and a weighing sensor III. The feeding system disclosed by the invention is adaptive to meet many weighing-metering feeding machines with different material states, high in shock resistance, and capable of preventing the 'bridging' phenomenon of powder materials, and ensuring the feeding continuity.

The invention relates to an LED (Light-Emitting Diode) lamp tube with large light flux and a large light-emitting angle. The LED lamp tube is provided with an insulated connecting sleeve which introduces a power supply to the electricity supply part of a COMMB-LED light source assembly and the heat dissipating and transferring aluminum profile support frame part of a V-shaped structure; the combined body of the heat dissipating and transferring aluminum profile of the V-shaped structure and the COMMB-LED light source assembly is arranged in a glass lamp tube. The LED lamp tube is characterized in that the heat conducting and transferring aluminum profile of the V-shaped structure is arranged in the glass lamp tube of the LED lamp tube along the length direction of the lamp tube; the COMMB-LED light source assembly is arranged on two symmetrical inclined surfaces of the heat conducting and transferring aluminum profile of the V-shaped structure and closely contact with the heat conducting and transferring aluminum profile in an adhering way; both ends of the lamp tube is provided with constant current power supplies; a diffusion membrane or a fluorescent powder adhesive tape which realizes light uniformity, different color temperature and color developing indexes is arranged on the inner wall of the glass tube positioned in the light-emitting direction of the COMMB-LED light source assembly.

The invention relates to a chopstick polisher, which comprises a forming device and a polishing device. The forming device comprises a feeding mechanism and a grinding head mechanism, wherein the feeding mechanism comprises a feeding hopper; the lower part of the feeding hopper is provided with a conveying trough; a chopstick pushing wheel is arranged at an opening on the side of the conveying trough; the lower side of the conveying trough is provided with a delivery screw driven by a main motor to rotate; the grinding head mechanism comprises a clamping belt pulley mechanism and a bottom plate; and one side of the clamping belt pulley mechanism is provided with a grinding head abrasive disc. The chopstick polisher has a compact and reasonable structure and high automation degree, does not need manual operation, saves the production cost, and improves the production efficiency. The feeding mechanism has a reasonable structure and makes the delivery and the grinding of semi-finished products of chopsticks more uniform and safe through the cooperation of the chopstick pushing wheel and the delivery screw; the transmission speed is controlled through the transmission connection of belt pulleys; and the semi-finished products of the chopsticks are delivered by a conveying belt and are ground and polished on the same machine, so that the production cost is greatly reduced, the production efficiency is effectively improved, and the use effect is good.

The invention relates to a full-automatic multifunctional bottle opener. A multifunctional bottle opening cutter is connected with a cutter frame disc through a thread; various types of cutters in the multifunctional bottle opening cutter are placed on a disc of the cutter frame disc; the disc is mounted in the upper part of a machine shell through a screw rod, and is movably connected with the screw rod; the cutter frame disc moves along axis when rotating to drive the multifunctional bottle opening cutter to position different bottle caps and to switch to the corresponding cutters; and a 360-degree rotating chassis is mounted at the lower part of the machine shell through a base extension shaft, and moves along axis when rotating, and is driven to position and clamp bottles. The full-automatic multifunctional bottle opener is small in size and light in mass, is more convenient for both home and entertainment venues, is simple in operation, automatically finishes the bottle opening task only by users pressing down a button, is safe, needs no manual opening of the bottles, in particular difficult-opened beer bottles, prevents dangers, is convenient and labor-saved, and is convenient for life. In addition, no similar products are on the market; and the full-automatic multifunctional bottle opener adapts to the demands of people.

The invention discloses a pure electric vehicle drive motor. The motor comprises a mounting seat, a mounting slot is formed in a top side of the mounting seat, a motor body is mounted in the mountingslot, an output shaft is arranged on one side of the motor body, first trapezoidal blocks are fixedly mounted on inner walls of two sides of the mounting slots, grooves are formed in both sides of themotor body, sliding blocks are slidably mounted in the grooves, second trapezoidal blocks are fixedly mounted on sides, away from each other, of the sliding blocks, the first trapezoidal blocks are adapted to the second trapezoidal blocks, one ends, away from the sliding blocks, of the second trapezoidal blocks extend out of the grooves and are in contact with the first trapezoidal blocks, firstlimiting slots are formed in the top side inner walls and the bottom side inner walls of the grooves, and first limiting blocks are fixedly mounted on the top side and the bottom side of the sliding blocks. According to the motor, the motor body is convenient to install, disassemble and maintain, the function of buffer protection for the motor body is achieved, and the motor has the advantages ofsimple structure and convenient operation.

The invention relates to a crude oil water content measuring device and method based on a radio frequency method. A left connecting pipe is arranged at the left end of an inner pipe, and a right connecting pipe is arranged at the right end of the inner pipe; an antenna protective sleeve with one end stretching into the right connecting pipe is arranged on the wall of the right connecting pipe, a radio frequency antenna is arranged in the antenna protective sleeve, a plug is arranged at one end, located in the inner pipe, of the antenna protective sleeve, a seal ring is arranged between the antenna protective sleeve and the wall of the right connecting pipe, an outer sleeve pipe is arranged outside the inner pipe, and a displayer and a radio frequency measuring device connected with the displayer through a wire are arranged on the outer sleeve pipe; the crude oil water content measuring device comprises a radio frequency signal generator, a signal amplification unit, a radio frequency power detection unit, a measuring resistor, a signal conditioning unit and a controller. The crude oil water content measuring device is reasonable in design, simple in structure, high in measuring accuracy, wide in range and suitable for all large oil fields.

The invention discloses a flexible joint clamp, a multi-layer mechanical arm with the flexible joint clamp and a full-automatic welding system provided with the multi-layer mechanical arm. The flexible joint clamp comprises a first flexible joint clamping board and a second flexible joint claming board, wherein the first flexible joint clamping board and the second flexible joint clamping board are arranged oppositely. The middle portion of the second flexible joint clamping board is installed on the first flexible joint clamping board in a pivoting mode. The upper portion of the first flexible joint clamping board and the upper portion of the second flexible joint clamping board are respectively provided with a flexible joint clamping portion. The lower portion of the second flexible joint clamping board is an inclined pressing board. The second flexible joint clamping board presses and abuts against the first flexible joint clamping board through a flexible joint spring. The flexible joint clamp can be matched with other hard elements so that the multi-level mechanical arm can be installed and formed, the multi-level mechanical arm with the flexible joint clamp can be applied to the welding system, and therefore full automatic welding between flexible joint and the hard elements is achieved. An accurate welding point and the good welding uniformity can be kept and the performance index of the welded product is good.

The invention discloses a rapid switched-type anti-skidding device for a car tire, pertaining to the anti-skidding technical field of car tires.The rapid switched-type anti-skidding device comprises a hub, the outside of which is provided with the tire. Two end surfaces of the hub are both provided with chucks. Multiple jaw grooves in the centripetal direction are formed in chuck bodies. Each jaw is outwardly provided with a support rod in the centripetal direction on a chuck plane. The top end of each support rod is provided with a ball head. A driving rod is arranged between two chucks and provided with gears matched with inner-ring gear teeth of bottom surfaces of the two chucks. A right end of the driving rod is connected with a power system. The rapid switched-type anti-skidding device for the automobile tire has following beneficial effects: when a driver inside a car does not stop the car on a snowy and frozen road surface, the rapid switched-type anti-skidding device for the car tire can be started or closed in order to conveniently and quickly ensure safety driving of the car and to ensure safety of the driver.

A catalytic burner of large-power fuel gas type is prepared for connecting gas inlet end of gas transmission pipe to one end of T-joint on pipe, connecting the other two ends in form of 90 degree elbow of T-joint to mixed gas channel, arranging fluid rectifier separately at inlet and outlet of mixed gas channel, connecting one set of catalyst carrier porous module set in frame separately to each of double-surface at burner cavity, packing high-temperature resisting insulation material at peripheral gap of said module and extending temperature transducer into said module through a temperature transducer entrance set on external wall of burner cavity.

The invention discloses a spherical electrode spark gap switch with an adjustable gap. A switch housing is cylindrical; a switch housing side baffle is combined with the switch housing through a bonding method; an anode support is fixed together with the switch housing side baffle through a screw and combined with a stud of an anode through a thread on a central through hole of the anode support; a conductor is fixed on an anode terminal through two nuts; one end of the anode in a switch cylinder body is a discharging spherical part; the other end of the anode is the stud; and the stud also has an effect of wiring the anode while having an effect of supporting the anode. A cathode and a cathode support are integrated; a trigger electrode is placed or not placed at the central part of the cathode; if the trigger electrode is placed at the central part of the cathode, the trigger electrode is placed in the cathode after being protected by a trigger electrode sheath; and a lead of the trigger electrode is led in through a trigger electrode terminal and a knurled thumb flat-head screw. According to the invention, the length of a discharging gas gap is adjustable, the length of the discharging gas gap can be flexibly changed according to requirements on switch discharging voltage, and the working range of the switch is wider.