301 results about "Arc extinction" patented technology

The application discloses an environment-friendly grounding switch with a gas arc-extinguishing medium, which comprises a grounding transmission spring mechanism, a transmission box assembly, a shell support sealing system, a grounding switch moving side assembly and a grounding switch static side conductor assembly; the grounding transmission spring mechanism is in driving connection with the grounding switch moving side assembly through the transmission box assembly; the grounding switch moving side assembly and the grounding switch static side conductor assembly are correspondingly arranged in the shell; the shell support sealing system provides support, sealing and gas chamber environment for the whole; the built-in air cylinder and the piston of the grounding switch moving side assembly form a gas blowing structure, and forced gas blowing auxiliary arc extinguishing is formed during opening. Compared with the prior art, the environment-friendly grounding switch has the advantages that the design structure is convenient to operate and use, and clean dry air or mixed gas arc-extinguishing medium with different proportions of N2 and O2 can be used.

The utility model relates to the field of electric power system and high voltage switch equipment discloses vacuum circuit breaker with signal feedback mechanism, including arc extinguishing chamber, the bottom fixedly connected with mechanism box of arc extinguishing chamber, the outside of mechanism box is provided with quick -witted connection mechanism, the top fixedly connected with voltage transformer of quick -witted connection mechanism, the outside fixedly connected with base of mechanism box, the outside of base is provided with quick -witted break mechanism, quick -witted connection mechanism includes support connecting plate, the outside fixedly connected with air cylinder no.

The application relates to the technical field of switch equipment, in particular to an arc-extinguishing chamber with a flow guide structure and a circuit breaker. The arc-extinguishing chamber with the flow guide structure comprises a contact seat, a static support and a flow guide cylinder, the contact seat is provided with an axial flow hole, the static support is a tubular structure with an open end, is sleeved on the contact seat through the open end, the flow guide cylinder is arranged in the static support along an axial direction, the flow guide cylinder and the static support surround an annular flow guide channel, a through hole is formed in the outer wall of the static support, a gas baffle is fixedly installed on the outer wall of the static support and corresponds to the through hole, and the gas baffle is provided with a gas discharge hole. The arc-extinguishing chamber with the flow guide structure can prolong the discharge path of the hot airflow and reduce the flow speed, can effectively prevent a large amount of foreign matters such as metal particles and dust carried in the hot airflow from being discharged, avoids threatening the ground or interphase insulation at the tail of the airflow channel, and improves the insulation reliability.

This utility model relates to a double-acting arc-extinguishing chamber based on ball screw transmission, including a housing, a moving contact and a stationary contact disposed within the housing, a ball screw rotatably disposed within the housing, a first fixed block fixedly connected to the moving contact, and a second fixed block fixedly connected to the stationary contact. One end of the ball screw is connected to a drive device. The ball screw has a first threaded section and a second threaded section with opposite directions of rotation. The first fixed block is threadedly connected to the first threaded section, and the second fixed block is threadedly connected to the second threaded section. A first guide rail is fixedly disposed on the housing, slidingly engaging with the first fixed block, and a second guide rail is slidably engaged with the second fixed block. This utility model, through ball screw transmission, converts rotational motion into linear motion of the first and second fixed blocks, realizing the opposite or opposite movements of the moving and stationary contacts, improving the closing and opening speeds of the arc-extinguishing chamber, shortening the breaking time, and effectively improving the breaking capacity of the circuit breaker.

The application discloses an arc extinguishing system, an independent three-phase switch and an electric life prediction method thereof. The arc extinguishing system adopts an innovative double arc extinguishing chamber structure, including a second arc extinguishing chamber arranged in a static contact head arranging space and a first arc extinguishing chamber fixed through a fixed frame, forming a hierarchical arc extinguishing mechanism. Based on the structure, the application also proposes a corresponding electric life prediction method. Through constructing a comprehensive prediction model including a first arc extinguishing chamber degradation sub-model, a second arc extinguishing chamber degradation sub-model and a synergistic effect model, using an accelerated life test platform to collect multi-source characteristic parameters, using a machine learning algorithm to learn the parameter degradation trajectory, and finally outputting the quantitative prediction of the remaining electric life. The method introduces non-invasive online monitoring, environmental correction, confidence interval evaluation and digital twin technology, realizes the transformation from "periodic maintenance" to "accurate predictive maintenance", significantly improves the prediction accuracy and operation and maintenance efficiency, and provides a reliable guarantee for the safe and stable operation of the power system.

This application provides an arc-blocking device and a circuit breaker, belonging to the field of electrical equipment technology. In this arc-blocking device, one end of an elastic element is connected to the circuit breaker housing, and the other end is connected to an arc-blocking element, which is located on the movement trajectory of the circuit breaker's moving contact. When the moving and stationary contacts of the circuit breaker are in contact, the arc-blocking element is located on the side of the moving contact facing away from the stationary contact. During the separation process of the moving and stationary contacts, the moving contact pushes against the first side of the arc-blocking element, causing the arc-blocking element to drive the elastic element to bend and deform in the first direction until the moving contact slips off from the first side. Then, under the elastic force of the elastic element, the arc-blocking element moves in the second direction to between the moving and stationary contacts, thereby forcibly cutting off the arc generated when the moving and stationary contacts separate. It has good breaking capacity and can effectively improve the arc-extinguishing capability of the circuit breaker. Furthermore, the arc-blocking device provided in this embodiment has a simple structure, is easy to assemble, operates reliably, and has a certain degree of universality.

The application discloses a triangular on-load voltage regulating tap switch and distribution transformer, which comprises a triangular shell, a time sequence contact assembly arranged in a strip layout in the shell and connected in series through a same square shaft, a wiring terminal arranged at each side of the triangular structure of the shell, and a stepping motor horizontally arranged in the shell and arranged in the same direction with the square shaft. The time sequence contact assembly comprises a support seat, a time sequence system arranged on the support seat, and a contact assembly. The time sequence system controls the opening and closing sequence of the vacuum arc-extinguishing chamber, and the contact assembly is driven by the stepping motor to realize gear shifting. The whole switch is installed below the transformer box cover. The application has the advantages of compact structure, convenient wiring, and reliable sealing ensured by integral buried installation. The pure mechanical time sequence system with a transmission ratio of 9:4 synchronizes the gear stepping and time sequence action, can stably realize 9-gear wide-range on-load voltage regulation, and improves the power supply reliability and equipment service life.

The application discloses an arc-extinguishing chamber assembly, which comprises a piston rod, a cylinder body and a piston seat. The outer circumferential surface of the piston rod, the inner wall of the cylinder body and the end surface of the piston seat form a compression cavity. The outer circumferential wall of the piston rod and the inner wall of the piston seat form an expansion cavity which is communicated with a nozzle. The piston seat is provided with a compression hole which is communicated between the expansion cavity and the compression cavity. The compression hole is provided with a one-way compression valve which allows gas to flow from the compression cavity to the expansion cavity. The piston rod is provided with a piston inner cavity which is communicated with the internal gap of a movable arc contact. The side wall of the piston rod is provided with a compensation hole which is communicated between the piston inner cavity and the expansion cavity. The compensation hole is provided with a compensation valve which allows gas to flow from the piston inner cavity to the expansion cavity. The arc-extinguishing chamber assembly can utilize the arc energy generated by the arc contact assembly, so that the operation of the movable mechanism of the circuit breaker is more convenient and labor-saving, and the breaking operation effect of the circuit breaker is optimized. The application further discloses a circuit breaker using the arc-extinguishing chamber assembly.

The application discloses a fuse shell and a fuse, and relates to the technical field of fuses, wherein the fuse shell comprises a shell body, at least one first partition and at least one second partition, the shell body is formed with an arc-extinguishing cavity and a buffer cavity distributed along a first direction; the first partition and the second partition are distributed along the first direction, the at least one first partition is arranged between the arc-extinguishing cavity and the buffer cavity, and the at least one second partition is arranged in the buffer cavity; wherein the first partition is provided with a first air vent, the second partition is provided with a second air vent, and the first air vent and the second air vent are arranged in a staggered mode along the first direction. The technical scheme of the application sets the first partition between the arc-extinguishing cavity and the buffer cavity, at least sets the second partition in the buffer cavity, and arranges the first air vent on the first partition and the second air vent on the second partition in a staggered mode, so that the breaking capacity of the fuse is improved, and the breaking effect of zero flying arc is facilitated to be realized.

The utility model belongs to the low -voltage electrical apparatus arc extinguishing technical field, especially point to a magnet assembly for arc extinguishing chamber, be located in circuit breaker, it is including: magnet shell, including opposite setting and having the first casing and second casing of internal cavity, the bottom of first casing and second casing is equipped with the insertion port that communicates with internal cavity, magnet, can be installed in internal cavity through insertion port, locking cover plate, it is movably set up at insertion port, it is used for after magnet installs in internal cavity can operate to lock magnet in the internal cavity of magnet shell. The utility model through above -mentioned design scheme will magnet completely package in the inside of insulating shell, has isolated electric arc pollution to the maximum extent, has improved the anti -pollution and anti -electricity -leakage performance.

The utility model discloses a kind of moulded case circuit breaker conducting systems, including base, multiple contact cavities are formed by multiple arrangement settings baffle in the base, multiple rotating cavities are opened in the base middle part in contact cavity opposite position, movable contact assembly is rotatably connected in the rotating cavity, static contact assembly that is installed in contact cavity is cooperated with movable contact assembly and realizes on-off, connection position is opened in the base surface front end, the static contact assembly includes static contact, first arc-extinguishing chamber and fixed baffle, one end of the static contact is set in contact cavity, the other end of the static contact extends to connection position, first arc-extinguishing chamber is installed below static contact, fixed baffle is arranged in first arc-extinguishing chamber opposite position on the surface of static contact upper side, and the bottom of fixed baffle is contacted with the outer wall of first arc-extinguishing chamber. By setting two arc-extinguishing chamber arrangement and positioning, the breaking capacity, safety reliability and service life of moulded case circuit breaker are significantly improved.

The utility model relates to a direct current switch arc extinguishing cabin structure, including the shell, the left side of shell and the right side of shell all are provided with the binding post, the bottom of shell is provided with the through groove, and the inside of through groove communicates with the shell, the inside of shell is installed with the sliding block that slides up and down, and the bottom end of sliding block passes through the through groove and extends to the outside of through groove, and the front side central position of shell is provided with the mounting hole, and the mounting hole is installed with the pivot, and the middle segment of pivot is equipped with the connecting rod, and the rear end of connecting rod is located in the inside of shell, and the terminal fixed mounting of connecting rod in the inside of shell is provided with the conducting rod, and the inside bottom of shell is provided with the binding post left and right sides symmetry, and the top fixed mounting of sliding block in the inside of shell is provided with the insulating sheet, and the rotation of pivot makes the conducting rod of connecting rod in the inside of shell close to the binding post or be far away from the binding post when the connecting rod is pushed, realizes on-off function, through the sliding sliding block, makes the insulating sheet insert the position that the conducting rod and the binding post are pasted together, realizes the function that extinguishes arc.

A high-voltage and high-current fast fuse comprises an end cover, a contact, a fuse tube, a fuse body, a fuse body guide column, arc extinguishing filler and a fastening screw, characterized in that two or more fuse body guide columns are arranged in the fuse tube, the fuse body is fixed on the fuse body guide column in a spiral winding manner, the contact is provided with a fuse body perforation, the fuse body is welded on the outer end surface of the contact through the perforation, the end cover end surface is overlapped on the outer end of the contact and is connected and fixed with the contact through the fastening screw installed hole of the end cover and the contact and the fastening screw. The disadvantages of poor welding are overcome to the maximum extent. In the case of not increasing the length of the fuse tube or even shortening the length, the rated voltage and the rated current of the fuse can be effectively improved, the anti-impact and anti-bumping capabilities of the fuse are improved, and the fuse can be used to protect the integrated power system of a ship, a large energy storage and power transmission system and other high-voltage and high-current power transmission systems.

This application relates to the field of electrical connection device technology, and more particularly to a double-break circuit breaker. The double-break circuit breaker provided by this application includes a housing and a contact system and an arc-extinguishing system located within the housing. The arc-extinguishing system includes a first sub-arc-extinguishing structure, a second sub-arc-extinguishing structure, and a partition. The first sub-arc-extinguishing structure is used to extinguish the arc generated when the first stationary contact separates from the first moving contact, and the second sub-arc-extinguishing structure is used to extinguish the arc generated when the second stationary contact separates from the second moving contact. The partition extends from the arc-initiating zone to the arc-extinguishing zone, providing electrical isolation between the first and second sub-arc-extinguishing structures in the arc-initiating and arc-extinguishing zones. Thus, during the arc-extinguishing process, the arc generated by the first contact group and the second contact group is less likely to cross-contact. The first sub-arc-extinguishing structure is only used to extinguish the arc generated by the first contact group, and the second sub-arc-extinguishing structure is only used to extinguish the arc generated by the second contact group, which helps to improve arc-extinguishing efficiency.

The application discloses a contactor, comprising: an outer insulating shell with a top opening; an insulating top cover covering the top opening of the outer insulating shell; an inner insulating shell arranged in the outer insulating shell for defining an arc-extinguishing chamber; a movable contact head movably arranged in the arc-extinguishing chamber; a first stationary contact head fixed to the inner insulating shell; and a second stationary contact head fixed to the inner insulating shell. One end of the first stationary contact head and the second stationary contact head extends into the arc-extinguishing chamber for electrically contacting with the movable contact head; at least one of the first stationary contact head and the second stationary contact head has a flat welding end extending from the insulating top cover, which is used for welding to a circuit board to be electrically connected with the circuit board. The contactor of the application is suitable for being directly welded to the circuit board, which is beneficial to saving customer installation time, improving installation efficiency and reducing installation space of the contactor.

The application belongs to the technical field of switches, and particularly relates to a circuit breaker or disconnector, which increases a backflow channel structure on the side wall of an arc extinguishing chamber, after the circuit breaker or disconnector arcs, the arc moves upwards, the pressure above the arc extinguishing chamber increases, the pressure in the middle region of the moving and static contacts below the arc decreases, the backflow channel is used to supplement the gas in the space behind the arc with the cold gas above, the arc is inhibited from falling back, and the arc extinguishing performance of the product is improved.

This invention proposes a voltage equalization circuit breaker. The voltage equalization circuit breaker includes a porcelain column circuit breaker and a voltage equalization device. The porcelain column circuit breaker includes a first arc-extinguishing unit, a second arc-extinguishing unit, a support post, and a tee. The voltage equalization device includes a first voltage equalization capacitor, a second voltage equalization capacitor, a first side voltage equalization ring, and a second side voltage equalization ring. The first and second side voltage equalization rings are formed as annular tubular components. This disclosure solves the problems of insulation structure failure and arc generation in existing circuit breakers used in high-altitude areas.

The utility model relates to a zero flying arc arc extinguishing chamber structure of circuit breaker, a zero flying arc arc extinguishing chamber structure of circuit breaker, including the casing formed by the upper cover, middle cover and base screw connection, install arc extinguishing chamber in the base, the upper and lower both ends of middle cover are equipped with corresponding several wiring terminals, the arc extinguishing chamber includes contact head support, the arc extinguishing grid piece of several connected in the both sides of contact head support and the peripheral baffle connected in the end of arc extinguishing grid piece, the peripheral baffle is equipped with the air outlet matched with the position of arc extinguishing grid piece, the base still is equipped with the baffle groove and the arc baffle of interference connection in baffle groove, the position of arc baffle corresponds with air outlet, is equipped with several through -holes on this arc baffle, the through -hole array forms the net -like structure, has realized arc baffle alignment air outlet, the arc baffle on the physical isolation blocks arc extinguishing chamber and does not completely extinguish the arc, the through -hole on arc baffle further separates arc, accelerates the remaining arc to extinguish, avoids the short circuit of circuit breaker because of the arc that sprays.

A high breaking large current small volume intelligent circuit breaker, comprising a shell with a width of 18 mm, the shell comprising a middle shell and side covers arranged on both sides of the middle shell, the middle shell and the side covers on both sides forming a first space and a second space for placing a circuit board respectively, the second space being partially recessed towards the first space to form a third space for accommodating a transmission assembly, both ends of the first space being provided as fourth spaces for accommodating a wiring assembly, between the two fourth spaces being sequentially arranged a fifth space for accommodating an electromagnetic assembly, a sixth space for accommodating an arc extinguishing assembly and a seventh space for accommodating an operating assembly, wherein the fifth space and the sixth space are arranged along the height direction of the shell, and the heights of the fifth space and the sixth space are consistent with the available height inside the shell, and the fifth space, the seventh space and the third space are sequentially arranged along the length direction of the shell. The overall structure is rearranged by staggered arrangement of the middle shell on both sides, realizing compatibility of large current and high breaking, and improving the overall performance and market competitiveness of the product.

The present invention relates to a fuse device for high-voltage applications, comprising a housing (10), an actuation chamber (12) and an arc-extinguishing chamber (14) formed within the housing (10), a busbar (16) extending through the housing (10) and between the actuation chamber (12) and the arc-extinguishing chamber (14), and a separation element (34) that moves out of the actuation chamber (12) and against the busbar (16) by means of an actuator (32), wherein a section (42) of the busbar can be moved to the arc-extinguishing chamber (14). In this invention, the busbar (16) is cut at a first predetermined break point (74); and a guide element (48) extends into the arc-extinguishing chamber (14) and has two opposing sidewalls (52, 54) that extend to a support surface (102) that defines the arc-extinguishing chamber (14) along the direction of movement of the separating element (34), and when viewed along the direction of movement of the separating element (34), the two sidewalls extend past opposing longitudinal sides (55) of the busbar segment (42) to be separated. The object of the invention is to extinguish the arc more quickly by squeezing the arc in a gapless manner in the triggered state. This is achieved by providing stiffeners (111) on the two sidewalls (52, 54) that extend along the direction of movement of the separating element (34) and at least along the length of the sidewalls (52, 54) to a support surface (102) that defines an arc-extinguishing chamber (14) along the direction of movement of the separating element (34) and abuts against the support surface when the separating element (34) moves into the arc-extinguishing chamber (14).

This application provides an arc detection and processing method and apparatus for a radio frequency plasma processing system, belonging to the field of semiconductor equipment technology. The method includes: acquiring analog voltage and current signals from the matching unit side as analog electrical signals; acquiring image data within the reaction chamber; fusing the analog electrical signals and image data to obtain arc level information and spatial location information; executing real-time arc extinguishing control based on the level information; and executing a location-based processing strategy based on the spatial location information. This application achieves accurate arc detection and location through the fusion of electrical signals and image information, efficiently realizes arc extinguishing control based on a graded arc extinguishing strategy, and guides root cause management through a location-based processing strategy. This solves the problem of high arc misjudgment rate in existing technologies and helps to eliminate the causes of arc occurrence at their source.

This utility model relates to the field of circuit breaker technology and discloses a circuit breaker that can shorten the overall arcing time. It includes two housings, a fixed frame, and an arc-extinguishing grid. The outer walls on both sides of the fixed frame are fixedly connected to the housings. A contact piece is fixedly connected to the middle of the lower end of the fixed frame. An actuating mechanism is provided inside the housings. The actuating mechanism includes a sleeve, a shaft, a rack, and a moving block. The lower end of the sleeve is fixedly connected to the fixed frame, and a first return spring is fixedly connected to the upper end of the fixed frame. A top block is fixedly connected to the upper end of the first return spring. An induction coil is sleeved on the outer wall of the sleeve. In this utility model, a large current is passed through the induction coil in the actuating mechanism to generate a strong magnetic field, attracting the top block to move downwards. This pushes the moving block to cause the locking block to release from the locking groove on the rack. Two torsion springs drive the rack to rotate, and through the connecting rod, the conductive piece and the contact piece are quickly separated, thereby shortening the arcing time.

This invention discloses a PCS energy storage inverter cabinet, comprising: a cabinet body, an arc-extinguishing circuit breaker, a PCS inverter assembly, and an input busbar assembly and an output busbar assembly fixed inside the cabinet body. A first electrode and a second electrode are fixedly installed on the inner side of the cabinet body, located at both ends of the arc-extinguishing circuit breaker and electrically connected to both ends of the circuit breaker, respectively. Both ends of the PCS inverter assembly are electrically connected to the second electrode and the ends of the output busbar assembly, respectively. The input busbar assembly includes: a first busbar assembly and, sequentially connected to it, an electrical isolation device, an overcurrent protector, and a filter module. In this invention, by setting an arc-extinguishing circuit breaker structure, the contact head and electrode ears deflect under the mechanical pressing action of the circuit pressure rod to engage the electrodes, improving the closing and opening speed and establishing an effective and stable connection. That is, the distance between the contacts increases significantly within the same time frame, and the electric field strength decreases, which helps to establish a strong arc-extinguishing capability in a shorter time.

The utility model discloses a kind of equalization electric field fixed sealing pole, comprising: pole body, moving contact, vacuum arc-extinguishing chamber, static contact seat and external component;Along the axial direction of pole body, the middle part is provided with the installation cavity through both ends;Moving contact is arranged in one end of installation cavity;Vacuum arc-extinguishing chamber is arranged in installation cavity;Static contact seat is arranged in installation cavity, and its one end is connected with moving contact, and the other end is connected with the one end of vacuum arc-extinguishing chamber close to moving contact;External component one end is connected in the one end of vacuum arc-extinguishing chamber away from static contact seat, and the other end is arranged in the one end of installation cavity away from moving contact. To solve the discharge problem caused by uneven electric field.

The utility model relates to vacuum arc-extinguishing chamber technical field and disclose high pressure direct current contactor's vacuum arc-extinguishing chamber quick dismounting and mounting mechanism, including the installation seat and the vacuum arc-extinguishing chamber main part of card in the installation seat of U type state setting, vacuum arc-extinguishing chamber main part top middle part is equipped with the installation support of U type state setting, the top of installation support all symmetrical sliding joint has the pusher, the bottom of pusher all fixedly connected with the sliding block, the one end of sliding block all fixedly connected with push rod, and the one end of push rod all fixedly connected with the piston, the top of installation support is equipped with the sliding cavity and piston cavity of the caliber all with the caliber of sliding block and piston matching, and all fixedly connected with reset spring between sliding cavity and sliding block, the both bottom of installation support all fixedly connected with the support, and the both outer wall of support all are equipped with the taper mouth, and the inner wall edge department all of taper mouth inlayed and set up with the clamping air bag, the utility model reduces the dismounting time, improved the efficiency, avoided the problem that the bolt scattered and installed the alignment inaccuracy simultaneously, promoted the assembly accuracy and equipment reliability.

This application belongs to the field of switch technology, specifically an arc-extinguishing chamber and a circuit breaker or disconnecting switch. The upper part of the arc-extinguishing chamber is divided into multiple independent spaces by a partition structure, which together with the lower arc-extinguishing chamber, forms multiple arc-extinguishing chambers connected in series. Each space has a pressure relief channel connected to the outside. After the circuit breaker or disconnecting switch ignites, the arc moves independently within each partition, preventing the gas in the high-pressure area of ​​the strong magnetic blow-out region from flowing to the low-pressure area of ​​the weak magnetic blow-out region. This effectively promotes the entry of gas into the grid plates (such as the last few grid plates on the moving contact side) in areas with weaker magnetic blow-out force, thereby improving the arc-extinguishing performance of the arc-extinguishing chamber grid plates.

This invention relates to the field of fuse technology, specifically a surface-mount fuse, comprising an insulating shell and a molten metal element. The insulating shell has side cavities and an inner platform. The side cavities are located at both ends of the inner platform. A narrow cavity communicating with the side cavities is located within the inner platform, and the cross-sectional area of ​​the side cavities is larger than that of the narrow cavity. The molten metal element is disposed through the narrow cavity, with both ends of the molten metal element positioned within the side cavities. The surface-mount fuse of this invention has advantages such as high breaking capacity, lead-free design, simple manufacturing process, and low cost. The design of the insulating shell in this invention incorporates four arc-extinguishing mechanisms: the rapid cooling effect of the high thermal conductivity of quartz sand on the electric arc; increased mechanical strength and impact resistance due to the thicker wall in the middle of the shell; arc-extinguishing effect of arc-extinguishing gas generated by the high-temperature ablation of the shell surface; and increased cross-sectional area of ​​the inner holes at both ends of the shell to provide pressure relief space. These mechanisms improve the breaking capacity of the product.

The utility model provides a pan-tilt driving motor starting capacitor board. The pan-tilt driving motor starting capacitor board comprises a switch interface module, an arc extinguishing module, a starting capacitor module and a network and power supply transmission interface module which are integrally configured on a circuit board, the arc extinguishing module is respectively connected with a motor limit switch of a holder driving motor, the camera device and the starting capacitor module through the switch interface module, and the network and power supply transmission interface module is configured to supply power to the camera device by external voltage and input network signals; in response to an electric energy signal sent to the pan-tilt driving motor by the camera device, the pan-tilt driving motor is controlled to act through the arc extinguishing module and the starting capacitor module; and in response to the moment that the contact of the trigger generator limit switch is disconnected, the arc extinguishing module absorbs transient voltage generated at the moment that the contact is disconnected so as to control the pan-tilt driving motor to stop acting. According to the application, the electric arc and sparking conditions generated by the position of the contact point in the limit switch during action in an alternating current power supply environment can be effectively inhibited, the contact point is effectively protected, the reliability is improved, the problem of control failure of the pan-tilt is avoided, and long-term stable operation of the pan-tilt is ensured.

This utility model relates to a chemical vapor deposition apparatus, which has a reaction chamber. The chemical vapor deposition apparatus also includes an upper electrode, a lower electrode, a mask, and an arc-extinguishing assembly. The upper and lower electrodes are vertically spaced within the reaction chamber, with the lower electrode supporting the substrate. The mask is installed on the inner wall of the reaction chamber and located above the lower electrode, serving to shield the edge of the substrate. The arc-extinguishing assembly includes a monitor, a gas ejector, and a controller. The monitor and gas ejector are installed on the inner wall of the reaction chamber, located between and adjacent to the mask and the upper electrode. The gas ejector is connected to an external gas source, and the monitor and gas ejector are connected to the controller. The monitor is used to monitor whether arc precursors appear in the area above the mask, and the controller is used to control the gas ejector to inject neutral particulate gas into the area where arc precursors appear, thereby blocking the formation of an arc in that area.