30results about How to "Reliable installation and use" patented technology

An elevator without an engine room mainly comprises a traction system, a guide system, an elevator car, a door system, a weight balancing system, an electric drive system, an electric control system and a safety protection system. A tractor of the traction system and a speed governor of the safety protection system are mounted in a shaft of the elevator. A control cabinet of the electric control system is mounted on the topmost hoistway door of the elevator so that the engine room is compressed in the shaft of the elevator. A permanent magnet gearless synchronous tractor is used as the tractor. Frequency conversion of the permanent magnet gearless synchronous tractor is controlled by a microcomputer. Transmission of the tractor is independent of a gearbox, so that transmission wastage is reduced greatly. Movable block transmission is used as a traction manner of the tractor. A diversion sheave which is used for rewinding of steel wire ropes of a traction system are mounted at two corners in the lower middle of the elevator car, so that top space of the shaft is saved, and top layer height is reduced. The elevator without the engine room has the advantages of simple structure, convenience to mount and use, reliability, low manufacture cost, capability of lowering energy consumption and the like.

The invention provides a hand brake detection reminding alarm system of a vehicle. The hand brake detection reminding alarm system comprises a hand brake device and a driver seat and is characterized by comprising a hand brake detection switch, a seat sensor, an ultrasonic object detection radar, an alarm device, a central control unit and a power source. The power source directly supplies power to the central control unit, and the hand brake detection switch, the seat sensor and the ultrasonic object detection radar are connected with the central control unit; and the signal output end of the central control unit is connected with the alarm device through an electronic switch. The ultrasonic object detection radar is arranged within the detection range of the radar to cover the driver position on the driver seat, and the seat sensor is arranged in a seat cushion of the driver seat. If the seat sensor and the hand brake detection switch detect that a driver leaves the seat cushion of the driver seat, and the hand brake device does not carry out braking, the ultrasonic object detection radar monitors whether the driver leaves driving space or not; if the abnormity exists, alarm indication is sent to the central control unit, and the alarm device is controlled to send out an alarm reminding signal.

The invention relates to a combined solid encapsulated pole and a working principle thereof. The combined solid encapsulated pole comprises an insulating cylinder with an upper cavity and a lower cavity, wherein one end of the insulating cylinder is connected to a seal cover. An outgoing line base is arranged at the left end inside the upper cavity, a pair of static conducting bases which are arranged at intervals and connected with each other are arranged in the middle, and a grounding base is arranged at the right end inside the upper cavity. The static conducting base at the left end is partially embedded in the left end inside the lower cavity. A screw rod for rotary positioning is arranged in the upper cavity, one end of the screw rod extends out of the seal cover, the screw rod is in threaded connection with a dynamic touch sleeve which is in contact match with the outgoing line base, the static conducting bases, and the grounding base and forms three conducting stations. A vacuum arc-extinguishing chamber is arranged in the lower cavity, the static contact of the vacuum arc-extinguishing chamber is connected to the static conducting base at the left end, the outer end of the dynamic contact is provided with soft connection and is fixedly connected with the left end of an insulating pull rod, the soft connection is connected with one end of a lower outgoing line rod fixedly sealed at the lower part of the insulating cylinder, and the right end of the insulating pull rod movably extends out of the seal cover. The combined solid encapsulated pole is small in size and relatively convenient and reliable to mount and use, and is suitable for being used as switch equipment.

The invention relates to a combined solid encapsulated pole and a working principle thereof. The combined solid encapsulated pole comprises an insulating cylinder with an upper cavity and a lower cavity, wherein one end of the insulating cylinder is connected to a seal cover. An outgoing line base is arranged at the left end inside the upper cavity, a pair of static conducting bases which are arranged at intervals and connected with each other are arranged in the middle, and a grounding base is arranged at the right end inside the upper cavity. The static conducting base at the left end is partially embedded in the left end inside the lower cavity. A screw rod for rotary positioning is arranged in the upper cavity, one end of the screw rod extends out of the seal cover, the screw rod is in threaded connection with a dynamic touch sleeve which is in contact match with the outgoing line base, the static conducting bases, and the grounding base and forms three conducting stations. A vacuum arc-extinguishing chamber is arranged in the lower cavity, the static contact of the vacuum arc-extinguishing chamber is connected to the static conducting base at the left end, the outer end of the dynamic contact is provided with soft connection and is fixedly connected with the left end of an insulating pull rod, the soft connection is connected with one end of a lower outgoing line rod fixedly sealed at the lower part of the insulating cylinder, and the right end of the insulating pull rod movably extends out of the seal cover. The combined solid encapsulated pole is small in size and relatively convenient and reliable to mount and use, and is suitable for being used as switch equipment.

The invention relates to an auxiliary supporting rod assembly special for a prefabricated panel with a door opening. The auxiliary supporting rod assembly comprises a large square pipe, a small square pipe, a steel plate A and a steel plate B, wherein one end of the small square pipe is sleeved with the large square pipe, one end of the large square pipe and the steel plate A are fixedly welded, and one end of the small square pipe and the steel plate B are fixedly welded. The steel plate A and the steel plate B are each provided with a plurality of screw holes in a drilling manner, a sleeve is fixed into each screw hole through a screw, the sleeves are embedded into the prefabricated panel with the door opening, and sleeving overlapping sections of the large square pipe and the small square pipe are fixedly connected and positioned through bolts and nuts. By means of the auxiliary supporting rod assembly, cracking damage of a prefabricated component with the door opening in the production, lifting and transporting process can be effectively avoided, and the building quality and the construction schedule are guaranteed; and meanwhile, the assembly is simple in structure, convenient to install and use, good in universality, reliable in working, capable of being repeatedly used and capable of reducing cost.

The invention provides an assembly type telescopic bridge-shaped tray of a low-voltage switchgear. The assembly type telescopic tray comprises a main bridge-shaped tray and piers at two ends of the main bridge-shaped tray. The main bridge-shaped tray comprises two first side plates at two sides, a bottom plate at the bottom, and a first cover plate at top. Each pier comprises four second side plates and a second cover plate at the top, wherein assembly type fixed connection is adopted. The ends of the first side plates at two ends of the main bridge-shaped tray are provided with two first waist holes. A first sealing plate is arranged outside the first side plate. One end of the first sealing plate is provided with two first circular holes. Furthermore fixing members are utilized for fixing. According to the assembly type telescopic bridge-shaped tray, the length of the bridge-shaped tray can be adjusted to a certain extent, thereby greatly reducing mounting cost and improving mounting efficiency. Furthermore the assembly type telescopic bridge-shaped tray has advantages of high convenience in mounting, and high structure stability.

The invention discloses a direct pressing type steel seal coding machine. The coding machine adopts a manual coding mode, and especially imprints six-digit character codes on the surfaces of upper covers of small cigarette cases, the character codes are clear and intelligible, and the parts of the character codes on the small cases have no damages. One end of a handle support adopts a pin to fix;a roller shaft passes through the handle support, and bearings are installed on one end of the roller shaft; the bearings directly press on an upper cover of a character code seat when being pressed,so that a lever type rolling down structure can be formed; two guiding shafts are sleeved by a pressure plate equipped with guiding sleeves to form a slip mechanism; a sleeve is installed in the center of the pressure plate and provided with a copper sleeve; a keyway penetrating in an axis direction is arranged in the copper sleeve; the character code seat penetrates into the sleeve; a flat key isinstalled at the upper part of the character code seat; the flat key combines with the keyway of the copper sleeve to form a slip mechanism; convex character codes are installed on the character codeseat; and under the action of the guiding and limiting of the two slip mechanisms, the character code seat can vertically press along the axes of the guiding shafts, so that the depth of each character code is consistent, and the quality of the character codes is intelligible and stable.

The invention discloses a filter screen of a fuel oil pump. The filter screen comprises a connecting head, a screen cloth skeleton and screen cloth, and is characterized in that an oil inlet is arranged in one end part of the lower end of the connecting head; longitudinal blocking pieces are respectively arranged on the lower end surfaces of the two end edges of the oil inlet in a downwards extending manner; an oil outlet with an oil inlet joint is arranged in the left end part on the lower end surface of one end part of the upper end of the connecting head, and a locking ring seat with a center hole on the bottom surface is arranged at the right end part of one end part of the upper end of the connecting head in an upwards extending manner; clamping buckles are evenly distributed at the upper end part of the inner wall of the locking ring seat; an arc-shaped locking ring window is arranged in the right side wall of the locking ring seat; a locking ring formed by a ring-shaped body and upwards-extending arc-shaped blades evenly distributed on the upper end surface of the ring-shaped body is arranged in the locking ring seat; the screen cloth skeleton consists of a framework and fillets distributed in the framework; and raised longitudinal support plates are distributed on the upper end surfaces of the longitudinal fillets; the two ends of one end part of the upper end of the framework are respectively connected with the two ends of the lower end edge of the oil inlet to form a whole body; and the screen cloth is wrapped outside the L-shaped screen cloth skeleton after being folded and is sealed in a welded manner. The filter screen is suitable for being used by the fuel oil pump.

The invention relates to release mechanisms, particularly to a universal type release mechanism. The universal type release mechanism solves the problem that existing release mechanisms are poor in safety and high in cost. According to the universal type release mechanism, a connecting plate is vertically arranged, two connecting rings are connected with the connecting plate in a fastened mode through a plurality of screw fasteners, and the central line of the two connecting rings coincides with the vertical central line of the connecting plate; the two connecting rings are symmetric to each other relative to the horizontal central line of the connecting plate; the V-groove of cutting explosives covers the entire horizontal central line of one side of the connecting plate, the initiating end of the cutting explosives is arranged outside the connecting plate and spaced from the neighboring side wall of the connecting plate at a distance of S; the cutting explosives are attached to the connecting plate through aluminum foil adhesive tapes; a detonator is adhered to the cutting explosives through insulating tapes and arranged between the initiating end of the cutting explosives and the neighboring side wall of the connecting plate, and the output end of the detonator is aligned to the upper surface of the cutting explosives. The universal type release mechanism can be applied to drop test of weaponry as wells as other mechanisms requiring a quick cutting function.

The invention provides an installation structure of the door and window auxiliary frame and the door and window outside frame. The door and window auxiliary frame consists of an upper auxiliary framematerial, a lower auxiliary frame material, a left auxiliary frame material, and a right auxiliary frame material, and the four auxiliary frame materials are correspondingly installed at a building opening; each auxiliary frame material is fixed on the inside wall of the building opening by fixed plates of the auxiliary frame; the fixed plates of auxiliary frame comprise an upper fixed plate and alower fixed plate; the door and window outside frame is arranged on the top end of each fixed plate of auxiliary frame by arranging fixed plates of outside frame, and the fixed plates of auxiliary frame are connected with the fixed plates of outside frame in a buckled mode; a plug-in head which is connected with the door and window outside frame in a plug-in mode is arranged on a horizontal plate, and the contact point on which the door and window outside frame is plugged on the outside of the plug-in head is sealed by sealant. A metal cover flashing used by the installation structure of thedoor and window auxiliary frame and the door and window outside frame is plugged into the integrative window more deeply, and the problem of rain leakage is thoroughly eradicated by gluing the sealanton the junctions of the materials; and a rainwater drainage structure is arranged on an external end of the metal cover flashing, and the rainwater directly flows down along a wall by a drainage lineof the rainwater drainage structure.

The invention relates to a junction box for a solar photovoltaic module and belongs to the technical field of electrical connectors. The junction box for the solar photovoltaic module comprises a box seat and a box cover body and is characterized in that a box cover seat is arranged at the middle position of a box seat body; a cavity is arranged in the middle of the box cover seat; a diode, a first sinking electrode and a second sinking electrode are arranged inside the cavity; an end face is formed at the outer edge of a wall body of the box cover seat; positive and negative lead terminals are formed at both sides of the bottom of the box seat body; a plug bush is arranged in the positive lead terminal and is connected with one end of the diode; a plug is arranged in the negative lead terminal and is connected with the other end of the diode; the first sinking electrode is arranged in a first positioning ring electrically connected with the plug bush; the second sinking electrode is arranged in a second positioning ring electrically connected with the plug; and the bottom surface of the box seat body is provided with a glue coating layer. The invention has the advantages that thejunction box is suitable for automatic stream line operation; the sinking electrodes are avoided being inclined or distorted due to an external force; the junction box is convenient for a manipulatorto operate; and the junction box is convenient to install and use and has long service life.

A liquid crystal display (LCD) auxiliary rack consists of a fixed arm and a connection arm, wherein the fixed arm is a right-angled fixed arm, one end of the fixed arm is provided with a U-shaped clip; the U-shaped clip is provided with a butterfly bolt, the U-shaped clip is used to clamp the fixed arm on the cylinder of a support on the back of the LCD; the other end of the fixed arm is connected with the connection arm through a bolt, the connection arm is provided with a folder; and the whole folder is prepared from engineering plastic. The auxiliary rack has simple structure, is easy to prepare, is convenient and firm to install and use and is convenient to assamble and disassamble. The invention solves the defect that the folder which is pasted with self-adhesive is easy to fall off, the folder of the invention can be folded and hidden to the back of the LCD when not used; and the invention has the advantages of convenient and beautiful installation, and can clamp and hold documents, note pads and the like and also hang folders, cloth bags, brush holders and other ornaments according to different demands so as to effectively expand the office space.

The invention relates to a rat-proof and anti-pressure prefabricated connection line and belongs to the fiber to the home solution technical field. The rat-proof and anti-pressure prefabricated connection line comprises a rat-proof and anti-pressure optical cable, a strengthening hanging wire and connectors which are connected with two ends of the rat-proof and anti-pressure optical cable; the rat-proof and anti-pressure optical cable includes an outer sheath, a stainless steel armoring tube and a tight-buffered optical fiber which are distributed sequentially from outside to inside; the strengthening hanging wire is connected with the rat-proof and anti-pressure optical cable through a strengthening rib; and the diameter of the strengthening hanging wire ranges from 1 mm to 1.2 mm. The rat-proof and anti-pressure prefabricated connection line has the advantages of convenient installation, high stability and high reliability and rat-proof and anti-pressure performance.

The diesel engine power transferring method and gear box device includes the power output of the marine diesel engine connected to the screw propeller via the transmitting gear box device; the parallel arrangement of the input shaft and the output shaft of the transmitting gear box device and the connection of the input shaft and the output shaft via shaft coupling to the output of the diesel engine and the input of the screw propeller separator, with at least one shaft coupling being universal shaft coupling; and the installation of the input gear and the transmission gear on the input shaft and the transmission shaft via separate sliding bearing. The present invention has reduced power transferring mechanism size, simple power transmission method, and other advantages.

The invention discloses an automatic exhaust valve device. A valve body with the top end center provided with an exhaust port is included. The valve body is internally provided with a sealing device.The automatic exhaust valve device is characterized in that the sealing device is of a structure capable of sliding up and down in a cavity of the part, below the exhaust port, of the valve body and is mainly formed through assembling of a floater, sliding rails, sliding rail tracks and track fixing frames; a blockage part is arranged at the top end of the floater, and a gap is arranged between the top end of the floater and the top wall of a hollow cavity of the valve body; and the multiple sliding rails are vertically and evenly arranged at the bottom end of the floater, the sliding rail tracks are connected to the inner wall of the valve body, and a plurality of liquid discharging stop plates are further arranged below the sealing device. The automatic exhaust valve device effectively achieves the function of automatic pipeline gas discharging, the abnormal motion of a floating oil discharging device due to gas in a pipeline is avoided, and potential safety hazards existing in a storage tank due to the pipeline gas are eliminated. The structure is simple, the production cost is lower, installation and usage are simpler and more convenient, the long-term work performance is stable and reliable, and safety of the oil tank and the pipeline is ensured.

The invention relates to the technical field of oil storage cabinets, in particular to an intelligent monitoring device for leakage of the oil storage cabinet. The intelligent monitoring device for leakage of the oil storage cabinet comprises the oil storage cabinet, a support, a first valve pipe and a second valve pipe, wherein the support is welded at the bottom end of the oil storage cabinet; the second valve pipe and the first valve pipe are respectively welded at the central positions of the upper end and the lower end of the oil storage cabinet; a monitoring device is welded at the top end of the left side of the oil storage cabinet. The leakage can be discovered in time and alarm can be carried out by adding the monitoring device on the oil storage cabinet; when the leakage occurs,the leakage condition can be observed quickly, meanwhile, the remote monitoring function is achieved, the leakage state of the oil storage cabinet can be monitored in a control room, the device is simple in structure, convenient and reliable to install and use, low in later maintenance cost and capable of better protecting a transformer, and the safety of the oil storage cabinet in the using process is greatly improved.

The invention relates to the technical field of oil storage cabinets, in particular to an intelligent monitoring device for leakage of the oil storage cabinet. The intelligent monitoring device for leakage of the oil storage cabinet comprises the oil storage cabinet, a support, a first valve pipe and a second valve pipe, wherein the support is welded at the bottom end of the oil storage cabinet; the second valve pipe and the first valve pipe are respectively welded at the central positions of the upper end and the lower end of the oil storage cabinet; a monitoring device is welded at the top end of the left side of the oil storage cabinet. The leakage can be discovered in time and alarm can be carried out by adding the monitoring device on the oil storage cabinet; when the leakage occurs,the leakage condition can be observed quickly, meanwhile, the remote monitoring function is achieved, the leakage state of the oil storage cabinet can be monitored in a control room, the device is simple in structure, convenient and reliable to install and use, low in later maintenance cost and capable of better protecting a transformer, and the safety of the oil storage cabinet in the using process is greatly improved.

The invention provides an aluminum plastic reinforced type mullion structure which comprises a mullion profile strip. The two ends of the mullion profile strip are transversely connected to the middles of vertical frames arranged on the two sides of a building door window, the mullion profile strip vertically divides and reinforces the door window integrally, the upper portion and the lower portion of the mullion profile strip are each provided with an L-shaped glass embedding groove for fixedly installing glass, the outdoor side of the mullion profile strip is connected with a long-strip-shaped aluminum alloy profile plate in a clamping mode, and the outer side face of the aluminum alloy profile plate is connected with an outwards-convex long-strip-shaped mullion reinforcing part through fastening parts; the mullion profile strip is made of macromolecular thermal insulation profiles, the upper end and the lower end of the outer side face of the mullion profile strip are each provided with an inwards-concaved clamping groove, and the upper portion and the lower portion of the aluminum alloy profile plate are connected to the upper clamping groove and the lower clamping groove in a clamping mode through clamping edges and then fixedly installed on the outer side face of the mullion profile strip; the mullion reinforcing part is connected together with the aluminum alloy profile plate and the mullion profile strip in a fastening mode through the fastening parts formed by long bolts. The aluminum plastic reinforced type mullion structure has the advantages of being simple in structure, convenient to install and use, reliable in installation and use, good in operation convenience, capable of further improving the wind pressure resistance of a door window system and increasing the safety level and the wind pressure resisting level of the door window and the like.

The invention relates to a laser projection point coordinate measurement device and its measurement method, which belong to the technical field of laser projection point coordinate measurement; the technical problem to be solved is: to provide an improvement of the hardware structure of a laser projection point coordinate measurement device and its measurement method; The technical solution adopted for this technical problem is: including a laser signal receiving unit and a laser signal scanning unit packaged in the casing, the front of the laser signal receiving unit is used to receive the laser beam emitted by the laser transmitter, and the laser beam is irradiated on the A laser irradiation point is formed on the housing of the laser signal receiving unit, and a laser signal scanning unit is connected to the back of the laser signal receiving unit; the signal output end of the laser signal scanning unit is connected to a microcontroller through a wire, and the microcontroller The signal input end of the controller is connected with the chip encoder, and the signal output end of the micro-controller is connected with the data storage module. The invention is applied to the laser projection point coordinate measuring device.

The invention discloses a cable line fault intelligent on-line monitoring system, which comprises a monitoring front end, and is characterized in that the monitoring front end is provided with a monitoring system, and the monitoring system comprises a control module, an on-line monitoring module, a current detection module, a centralized processing module and a communication module; the monitoring rear end is provided with a monitoring station, the monitoring station is internally provided with a CPU, the CPU is the core control of the monitoring station, and the monitoring station is also internally provided with a signal receiving unit, a signal analysis unit, a signal processing unit, a signal sending unit and a signal alarm unit; and the monitoring terminal comprises a computer, a mobile phone and a tablet personal computer and is used for receiving the fault information of the cable line. Intelligent real-time online monitoring is carried out on the cable line through the monitoring front end, the monitoring rear end and the monitoring terminal, the technical principle of a traditional common fault detector is broken through, the application range is wider, and installation and use are reliable.

A special auxiliary support bar assembly for prefabricated wall panels with door openings, comprising a large square tube, a small square tube with one end inserted into the large square tube, a steel plate A welded and fixed to one end of the large square tube, and a steel plate B welded to one end of the small square tube. A number of screw holes are drilled on the steel plate A and the steel plate B, and a sleeve is fixed with a screw in each screw hole. The sleeve is pre-buried in the prefabricated wall panel with a door opening. The nut secures the connection in place. The invention can effectively avoid cracking and damage of the prefabricated components with door openings during production, hoisting and transportation, and ensure the construction quality and construction progress. At the same time, the components have simple structure, convenient installation and use, good versatility, reliable work, reusable and low cost .

The invention relates to the technical field of oil level monitoring devices, in particular to a pull rod type oil level monitoring device for oil storage cabinets. The device comprises an oil storagecabinet, a transformer capsule, a first valve pipe and a second valve pipe. The first valve pipe and the second valve pipe are welded to the upper end and the lower end of the oil storage cabinet respectively. The transformer capsule is clamped in the inner cavity of the oil storage cabinet in a left-right direction. A monitoring mechanism is clamped with the top end of the left side of the oil storage cabinet at one end, and extends into the inner cavity of the oil storage cabinet and is clamped with the transformer capsule at the other end. According to the pull rod type oil level monitoring device for the oil storage cabinets, an oil level of the oil storage cabinet can be reliably and accurately displayed through replacing a floating ball type structure by the monitoring mechanism, thereby avoiding false oil level phenomena caused by wrinkles and wrapping, improving the accuracy, and ensuring the normal operation of the transformer. Meanwhile, oil level states of the oil storage cabinet can be remotely checked in real time by realizing the remote display function. The device is simple in structure, convenient and reliable to install and use, and can better protect the transformer.

A shock-absorbing mechanism for a saw blade, comprising: a base, a sliding table slidably installed on the base, a sliding table driving device arranged on the base for driving the sliding table to move, a tail end hingedly installed on the sliding table through a pin shaft III Gland and gland locking device, when installing or replacing the saw blade, turn the gland upwards, and turn the gland back after the replacement. At this time, drive the sliding table to move relative to the base through the sliding table driving device, adjust to the position of the upper and lower pressing blocks at the upper and lower ends of the saw blade, and fix it through the gland locking device after adjustment. At this time, the upper pressing block and the lower pressing block will be tight. Paste the upper and lower surfaces of the saw blade. When the saw blade is working, the vibration generated is transmitted to the spring II through the pressing block, and the spring II absorbs the vibration, thus playing the role of shock absorption and shock resistance. The invention has a compact and reasonable structure, is applicable to saw blades of different thicknesses and diameters, is convenient and reliable to install and use, improves the working efficiency of the sawing machine and the section quality of the workpiece, and prolongs the service life of the saw blade.

The invention provides a hand brake detection reminding alarm system of a vehicle. The hand brake detection reminding alarm system comprises a hand brake device and a driver seat and is characterized by comprising a hand brake detection switch, a seat sensor, an ultrasonic object detection radar, an alarm device, a central control unit and a power source. The power source directly supplies power to the central control unit, and the hand brake detection switch, the seat sensor and the ultrasonic object detection radar are connected with the central control unit; and the signal output end of the central control unit is connected with the alarm device through an electronic switch. The ultrasonic object detection radar is arranged within the detection range of the radar to cover the driver position on the driver seat, and the seat sensor is arranged in a seat cushion of the driver seat. If the seat sensor and the hand brake detection switch detect that a driver leaves the seat cushion of the driver seat, and the hand brake device does not carry out braking, the ultrasonic object detection radar monitors whether the driver leaves driving space or not; if the abnormity exists, alarm indication is sent to the central control unit, and the alarm device is controlled to send out an alarm reminding signal.

The invention relates to a damper for 1000kV extra-high voltage alternative-current transmission lines in power sector, which comprises a cable clamp, two damper bodies, a steel strand and at least one preformed armor rod. The cable clamp and the steel strand are fixedly connected; the two damper bodies are respectively fixed on the two ends of the steel strand; the preformed armor rod fixes the cable clamp on a power transmission line; the cable clamp is in a sea horse shaped structure; the damper bodies are in a kirsite cucurbit shaped structure; and the connection position of the steel strand and the damper bodies is arranged on the sides of the fixing end damper heads of the damper bodies. Since the cable clamp is provided with a separation nail, the damper can be effectively connected with a power transmission cable; and hangers of the cable clamp, as well as corners of the cable clamp, which are used for fixing conduits, are designed in to an arc shape, thereby avoiding marginaldischarge; since the damper bodies made of kirsite are cast into a cucurbit shape, the specific gravity of the damper bodies is improved and the volume of the damper bodies is reduced; and since the connection between the windward side of the damper head at a cantilever end and the damper heads is designed into an arc shape and the size of the arc is controlled in a certain range, the marginal discharge can be avoided.