378results about How to "Reduce usage limitations" patented technology

The invention discloses a house building construction dust removal device which is applied to the technical field of house building construction and comprises a dust removal mechanism, the dust removal mechanism comprises a shell assembly, and when the house building construction dust removal device is used, the device is preferentially placed on a needed platform. And when spraying dust removal needs to be carried out in a near range, rotation of an adjusting ring is achieved by rotating a rotary knob, and the angle of a spray head can be adjusted. The angle of the spray head can be adjusted and changed, so that the range of the device is changed, the diameter of a sprayed cylinder is expanded, and the spray head is adjusted to be in a state of gathering towards the center when the fan blades need to be matched for remote spraying subsequently, so that the spray head can be matched with air blowing of the fan blades for spraying. Through the arrangement, different use angles of the spray head can be expanded to achieve different spraying effects, so that the use flexibility of the dust removal device is improved, and the use limitation is reduced.

The utility model relates to the technical field of metal door and window installation correction assemblies, and solves the problems that the device cannot be used in a scene that the device cannot be connected with a power supply, electrical equipment has a certain possibility of failure and damage and cannot be used when being damaged, and the use limitation of the scheme on the correction device is large. The metal door and window installation correcting assembly comprises a bottom plate, a supporting column is arranged on the top face of the bottom plate, a top plate is fixedly connected to the top face of the supporting column, a rotating assembly is installed on the top face of the top plate through an formed rotating hole, a screw is arranged on the bottom face of the rotating assembly, and a sleeve is in threaded connection with the surface of the screw. A movable plate is installed at the lower end of the sleeve, a pressing plate is installed on the bottom face of the movable plate through a buffering structure, the rotating assembly comprises a shell installed on the top face of the top plate, a rotatable handle is arranged on the top face of the shell, a large gear is installed on the bottom face of the handle, and the side face of the large gear is meshed with a small gear.

The utility model relates to the technical field of laser cutting machines, in particular to a laser cutting machine which is characterized in that a plate is placed on a disc and fixed through a fixing assembly, and after the position of a laser cutting assembly on a support is adjusted and fixed, a laser assembly and a motor are started; the motor drives the plate to rotate through the disc and under the cooperation of the fixing assembly, meanwhile, the laser cutting assembly cuts the plate, cutting of circles with different diameters on the plate is achieved, convenience is improved, and use limitation is reduced. Comprising a workbench, a support, a motor, a disc and protruding blocks, the support is arranged at the top end of the workbench, the motor is arranged at the bottom end of the workbench, the output end of the motor extends to the position above the workbench and is connected with the center of the bottom end of the disc, and the protruding blocks are arranged at the top end of the disc. A laser cutting assembly is fixedly arranged on the support in a sliding mode, and a fixing assembly is arranged on the disc.

The utility model discloses a safety grating convenient to install, which relates to the technical field of safety gratings and comprises a workbench, the top end of the workbench is connected with an adjusting assembly in a clamping manner, the adjusting assembly comprises two mounting plates, one side of one mounting plate is connected with a telescopic plate, and the telescopic plate is in sliding connection with the interior of the other mounting plate. Two clamping rods are slidably connected to the other side of the mounting plate, fixing plates are connected to the two sides of the top end of the workbench, clamping grooves are formed in the two sides of each fixing plate, and the clamping rods are connected with the clamping grooves in a clamped mode; the beneficial effects of the utility model are that through the cooperation of the two mounting plates and the telescopic plate, the distance between the transmitting grating and the receiving grating can be adjusted according to the monitoring range of the workbench, and then the mounting range of the transmitting grating and the receiving grating can be adjusted; and the mounting plate with the position adjusted can be conveniently and quickly mounted on a workbench, and the use limitation of the safety grating is reduced.

The utility model discloses video security monitoring equipment, belongs to the technical field of monitoring equipment, and mainly solves the technical problems that in the monitoring process of monitoring equipment in the prior art, a camera body is fixed in a shell, multi-angle adjustment of the monitoring equipment is difficult, the monitoring range of the equipment is inconvenient to adjust, the use limitation is large, and the monitoring efficiency is high. The monitoring equipment comprises a fixed support, a monitoring camera is rotationally arranged above the fixed support, a rotating column is arranged at the top of the fixed support, a mounting frame is fixedly connected to the top end of the rotating column, the mounting frame is in a U shape, the monitoring camera is located in the mounting frame, and the rotating column is arranged on the top of the fixed support. An adjusting assembly is arranged in the mounting frame, a fixing cover is fixedly connected to the top of the fixing support, a limiting assembly is arranged on the outer surface of one side of the fixing cover, a positioning ring is fixed to the surface of the rotating column, and a plurality of inserting holes are formed in the outer surface of the positioning ring.

The invention discloses pipeline joint multi-shaft automatic machining equipment, and relates to the technical field of pipeline joint machining, the pipeline joint multi-shaft automatic machining equipment comprises a connecting frame and a connecting plate, the top of the connecting frame is provided with a driving motor, the output end of the driving motor is provided with a lead screw, and the external thread of the lead screw is provided with a top frame. According to the multi-shaft automatic machining equipment for the pipeline joint, the rack can be synchronously driven to move through position adjustment of the top frame, so that the rack can be meshed with a side gear when moving, the side gear can rotate and follow a side screw connected with the side gear, and a threaded seat on the outer surface of the side screw can horizontally move on the outer surface of the side screw; and therefore, the vertical plate and the cleaning plate can be attached to the inner walls of the supporting base and the collecting frame for cleaning, the situation that small chippings generated during pipeline joint machining are attached to the inner walls of the supporting base or the collecting frame and are difficult to clean is avoided, and the cleanliness of a machining area is kept when the pipeline joint is machined.

The utility model relates to the technical field of wood processing, and discloses a wood processing positioning device which comprises a bottom plate, a supporting table is fixedly installed at the top end of the bottom plate, a hydraulic cylinder is fixedly installed at the top end of the supporting table, a U-shaped push plate is fixedly installed at the output end of the hydraulic cylinder, and positioning mechanisms are fixedly installed at the two ends of the U-shaped push plate. The positioning mechanism comprises a first clamping plate, a second clamping plate and a third clamping plate, positioning plates are fixedly installed on the outer walls of the second clamping plate and the third clamping plate, the first clamping plate, the second clamping plate and the third clamping plate are arranged to clamp and position cylindrical wood of different specifications, the stability of the cylindrical wood during machining is improved, and the using limitation of the device is reduced; through joint cooperation of a positioning plate, a positioning groove, a first magnetic plate, a second magnetic plate, a contraction groove, a clamping block, a clamping groove, a spring, an abutting block and an anti-skid pad, a worker can conveniently disassemble, assemble and replace a second clamping plate and a third clamping plate, and the machining efficiency of the cylindrical wood is improved.

The utility model relates to the technical field of heavy metal analysis and detection, and provides a sludge heavy metal analysis and detection device which comprises a rack, a sampling tube, a push plate, glass slides, a layering plate, a sampling mechanism and a fixing mechanism, a sliding hole is formed in the rack, the sampling tube is arranged in the sliding hole in a sliding mode, the push plate is arranged in the sampling tube in a sliding mode, the glass slides are arranged, and the layering plate is arranged on the rack. The multiple glass slides are arranged on the machine frame, the two layering plates are arranged on the machine frame, the sampling mechanism is arranged on the machine frame and used for sampling sludge, and the fixing mechanism is arranged on the machine frame and used for fixing the machine frame. In the prior art, heavy metal layering is different, only sampling detection of sludge on the surface of the river bottom is limited, accurate detection of heavy metal layering at different depths is difficult, and the final detection accuracy is easily affected.

The invention relates to the technical field of shear testing machines, in particular to a composite material shear testing machine which comprises a base and a support installed at the top end of the base. The device comprises a support and further comprises a driving device, a testing device, a first hydraulic cylinder, first clamping pieces, a supporting plate and two second hydraulic cylinders, the first hydraulic cylinder is installed at the top end of the support, the two first clamping pieces are installed at the moving end of the first hydraulic cylinder through the driving device, and the driving device is used for driving the two first clamping pieces to move oppositely; the supporting plate and the two first clamping pieces are vertically and oppositely arranged, the supporting plate is installed at the moving ends of the two second hydraulic cylinders, the two second hydraulic cylinders are both installed at the top end of the base, and the testing device is arranged on the base; the positioning operation convenience of the pattern is improved, the complexity of the fixing operation of the pattern by personnel is reduced, and the pattern is subjected to stretching, extruding and twisting tests through the test device, so that the test use limitation is reduced, the multi-purpose effect of one machine is improved, and the working efficiency is improved.

The utility model discloses a modularized combined deformation signboard capable of being quickly updated, and particularly relates to the technical field of signboards, the modularized combined deformation signboard mainly comprises a switching rotating block, a plurality of magnets are embedded and magnetically attracted on the outer wall of the switching rotating block, one side of each magnet is bonded and fixed with a module identification strip, and one side of the switching rotating block is provided with a combined switching assembly; the combined switching assembly comprises a rotating shaft fixedly arranged on one side of the switching rotating block; the combined switching assembly further comprises a sleeve plate, a rotating cap, a linkage shaft and a sleeving plate. The combined switching assembly is adopted, the magnets on the eight module identification strips are magnetically attracted to the switching rotating block to achieve combination, the linkage shaft and the rotating shaft can rotate the switching rotating block, the eight module identification strips are rotated, updated and replaced corresponding to different kindergarten child name identifications, signboards of different shapes and names are rapidly updated and switched, and the kindergarten child name identification switching device is simple in structure, convenient to use and high in practicability. The use limitation is small.

The utility model discloses a cooling liquid filling device for an engine test tool. The cooling liquid filling device for the engine test tool comprises a rack, a cooling liquid storage box, a filling assembly and a lifting assembly. During use, aiming at engine test tools of different specifications, especially when the heights of cooling liquid filling ports of engine racks are different, the height of the filling head can be adjusted by operating the lifting assembly, so that the filling head can be aligned with the cooling liquid filling ports of the engine racks of different heights and can be suitable for the engine test tools of different specifications; and the use limitation is smaller. The part, located between the lifting assembly and the cooling liquid storage box, in the connecting pipeline forms a deformation part, the deformation part can deform along with movement of the filling head, and the problem that the connecting pipeline is damaged due to the fact that the filling head pulls the connecting pipeline when moving can be avoided; the cooling liquid filling device for the engine test tool has the advantages of being smaller in limitation and higher in practicability on the basis of ensuring the working reliability.

The utility model discloses urban greening plant planting and maintaining equipment, and belongs to the technical field of urban greening and maintaining. Comprising an upper hoop and a lower hoop, a shaft rod is arranged between the upper hoop and the lower hoop, the shaft rod can annularly rotate around the outer edge of the upper hoop and the outer edge of the lower hoop, the shaft rod is parallel to the axis of the upper hoop, and a winding disc capable of ascending and descending is rotationally arranged on the shaft rod. The lower hoop is fixed to the lower end of a tree trunk, then the upper hoop is arranged above the tree trunk, then the end of the heat preservation cloth is fixed to the tree trunk, the shaft rod is dragged to enable the winding disc to rotate around the tree trunk so that the heat preservation cloth can be wound around the tree trunk, the winding disc ascends and descends along the shaft rod, all-directional winding can be conveniently conducted, the overall structure is simple, and operation is convenient. Power supply cooperation is not needed, and the use limitation and the cost are reduced.

The invention relates to the technical field of detection of building construction, and discloses a hole-finding device for detecting grooves formed in ground-connected walls, comprising a shell, wherein an adjusting mechanism is arranged inside the shell; the adjusting mechanism comprises a motor and a moving rod, a rotating shaft is fixedly installed at the output end of the motor, the bottom end of the rotating shaft is rotatably connected to the bottom end of the inner wall of the shell through a first bearing, a gear roller is fixedly sleeved on the outer wall of the rotating shaft, a sleeve passes through the bottom end of the shell, and the outer wall of the sleeve is rotatably connected to the shell through a second bearing, and a gear is fixedly sleeved on the outer wall of the sleeve. By arranging the adjusting mechanism, the hole-finding mechanism at the bottom can be driven to rotate, so that the groove wall can be detected at 360 degrees, the detection range can be increased, the detection efficiency can be improved, and the problem that it is inconvenient to adjust the angle of the existing hole-finding device, the hole-finding mechanism needs to be disassembled and reassembled when adjusting the angle, which is inconvenient to use and has low detection efficiency is solved.

The utility model discloses an automatic spraying device for formaldehyde removal reagent, which comprises a bottom plate, a protective cylinder fixedly mounted on the top end face of the bottom plate, a height adjusting mechanism fixedly mounted at the center of the top end face of the bottom plate, a rotating mechanism fixedly mounted at the top end of the height adjusting mechanism, and a placing plate fixedly mounted at the top end of the rotating mechanism. An angle adjusting mechanism is fixedly installed on the top end face of the containing plate, a collecting box is fixedly installed on the angle adjusting mechanism, and a spraying machine is fixedly installed at the top end of the collecting box. The placing plate is mounted on the bottom plate through the height adjusting mechanism and the rotating mechanism, and the placing plate can be clamped and meshed on an output shaft of the driving gear and a driven gear through the connecting ring and the driven gear, so that the rotating mechanism drives the spraying machine to rotate through the placing plate, the angle adjusting mechanism and the collecting box; and it is guaranteed that the spraying machine can conduct all-directional spraying operation, the spraying range of the formaldehyde removal reagent is widened, and the use limitation of the automatic spraying device for the formaldehyde removal reagent is reduced.

The utility model discloses an ion fan mounting structure of EOL test equipment relates to EOL test equipment technical field, including fixed bottom plate and ion fan main part, the left and right sides of ion fan main part all are installed with damping pivot, and the end of damping pivot is provided with the axle end cover. This kind of ion fan mounting structure of EOL test equipment, ion fan main part can utilize the design of damping pivot and rotate, and the damping effect of damping pivot can be limited at any angle when ion fan main part is rotated, so that after ion fan main part is installed, angle adjustment can be carried out through damping pivot, which is convenient for users to maintain or adapt to the adjustment according to the required heat dissipation position, reduces the use limitation, and the design of fixed bottom plate and fixed side plate can provide sufficient space for the angle rotation of ion fan main part, and reduce the actual contact surface of ion fan main part.

The utility model discloses an external flip 180-degree super fast charging wire for a luggage, which comprises a USB (universal serial bus) surface cover, a rear cover arranged behind the USB surface cover, a front puncture nail arranged behind the USB surface cover, and a rear puncture nail arranged in front of the rear cover and matched with the front puncture nail for use, and relates to the technical field of luggage. The bag is externally provided with the 180-degree flip cover super fast charging wire, the convenience and practicability are high, a user does not need to hold a power bank for charging, the complexity of holding charging equipment by the user is reduced, good convenience is provided for mobile phone charging, the outer sealing frame and the inner sealing frame are in extrusion contact, sealing waterproof protection on an interface in the USB surface cover is achieved, and the practicability is high. Screws can penetrate through the external threaded holes and the internal threaded holes, so that the rear cover is connected with the USB surface cover, the thickness of cloth and leather which are pressed by the front piercing nails and the rear piercing nails in a crossed manner is adjusted and fixed according to the driving depth of the screws, and the use limitation is small.

This utility model discloses a kilogram weight verification and protection device, belonging to the field of weight verification and protection technology. It includes a protective frame and electrically operated sliding doors. The protective frame has a C-shaped structure and is mounted on a base. Two sets of electrically operated sliding doors are slidably arranged inside the protective frame, and the two sets of doors are staggered. When the two sets of doors slide to the leftmost and rightmost positions of the protective frame respectively, the protective frame and the two sets of doors form a closed structure covering the base. Photoelectric switches are respectively provided on the left and right sides of the protective frame to detect the position of the electrically operated doors. This utility model has a high degree of automation, requires little space, and facilitates the handling of weights.

The invention provides an intelligent mobile operation robot control system and method.The intelligent mobile operation robot control system comprises an intelligent robot body, a mechanical arm is rotationally matched with one side of the top end of the intelligent robot body, the extending end of the mechanical arm is rotationally connected with a rotating block, and the bottom end of the rotating block is rotationally connected with a connecting sleeve; the bottom end of the connecting sleeve is in threaded connection with an electromagnetic chuck; t-shaped grooves are formed in the two ends of the rear side of the intelligent robot body correspondingly, hydraulic frames are arranged at the two ends of the rear side of the intelligent robot body correspondingly, and an inclined plate is fixedly connected to one end of each hydraulic frame. Through the intelligent robot body, the camera, the hydraulic cylinder and the electromagnetic chuck, the intelligent robot body receives a moving operation instruction, then planning is completed through a route, the intelligent robot body completes position movement after planning, and the hydraulic frame can be adopted to complete the conveying effect; and when the position of the part needs to be transferred, the electromagnetic chuck can be adopted to complete electromagnetic adsorption to complete position movement.

The utility model discloses a machining equipment clamp with an adjusting effect, and relates to the technical field of clamps. A universal ball rod is fixedly arranged at the bottom end of the connecting block, a supporting rod is fixedly arranged at the bottom end of the universal ball seat, a ball head of the universal ball rod is rotatably connected into a groove of the universal ball seat, four connecting rods are evenly and fixedly arranged at the two ends of the connecting block, and two positioning blocks are evenly and fixedly arranged at the ends, away from each other, of the four connecting rods. Two positioning plates are evenly and fixedly arranged at the top end of the positioning block, first threaded holes are formed in the two positioning plates, and first threaded rods are screwed into the two first threaded holes. The supporting rod, the rotating groove, the second threaded hole, the round rod, the fixing rod limiting block and the second threaded rod are used in cooperation to rotationally fix the position of the universal ball seat, and the universal ball rod and the universal ball seat are arranged and matched with the stabilizing handle to rotationally fix the positions of the clamp and a workpiece. And the use limitation of the clamp for the machining equipment with the adjusting effect is reduced.

The utility model relates to the technical field of lithium batteries, and discloses a high-safety spot welding splicing device for assembling lithium batteries, which comprises a workbench, a connecting block and a moving mechanism, a fixing frame is fixedly mounted at the top end of the workbench, and the connecting block is fixedly mounted at the top end of the inner wall of the fixing frame through the moving mechanism. An electric telescopic rod is fixedly installed at the bottom end of the connecting block, and a pressing protection mechanism is arranged at the output end of the electric telescopic rod. The pressing protection mechanism comprises a fixing plate and a pressing plate, the pressing plate is arranged below the fixing plate, the fixing plate is fixedly installed at the output end of the electric telescopic rod, by arranging the pressing protection mechanism, the pressing plate can move along with the electric welding machine, the pressing plate can press a nickel sheet at any position on a lithium battery, the use limitation of the device is reduced, and the use efficiency of the device is improved. And by arranging the blocking cover and the transparent cover, a certain protection effect can be achieved on the eyes of people in time in the welding process, and the situation that strong light irritates and harms the eyes is avoided.

The utility model relates to the technical field of wind speed and wind direction measurement, in particular to a meteorological wind speed and wind direction measuring instrument, which is portable and movable for an ultrasonic wind speed and wind direction measuring instrument, and the ultrasonic wind speed and wind direction measuring instrument displays the detection result of wind direction and wind speed through a display screen. When the ultrasonic wind direction and wind speed measuring instrument needs to be fixedly installed and fixed detection is carried out on the same place, the lead screw assembly extends to the position below the grab handle through the through opening under the cooperation of the positioning hole, and the use limitation is reduced; comprising an ultrasonic wind direction and wind speed measuring instrument, a display screen, a grab handle, a cavity, a through opening, a fixing hole and a positioning hole, the display screen is arranged on the ultrasonic wind direction and wind speed measuring instrument, the grab handle is arranged at the bottom end of the ultrasonic wind direction and wind speed measuring instrument, the cavity is formed in the grab handle, the through opening is formed in the bottom end of the grab handle, and the through opening is communicated with the cavity. Two groups of fixing holes and two groups of positioning holes are symmetrically formed in the left and right ends of the grab handle.

This utility model discloses a multimodal inspection drone, including a central body base. Four rotating arms are fixedly installed on the outer surface of the central body base, and the four rotating arms are evenly distributed circumferentially around the central point of the central body base. A steering motor is fixedly installed at the center of the lower surface of the central body base. A rotating connecting seat is fixedly installed at the bottom end of the output shaft of the steering motor. A camera is arranged inside the rotating connecting seat. Rotating shafts are fixedly installed on the outer walls of both ends of the camera. The camera is rotatably connected to the rotating connecting seat through the rotating shafts on both sides. An angle motor is fixedly installed on one outer wall of the rotating connecting seat, and the output shaft of the angle motor is connected to the rotating shaft. The camera of this utility model inspection drone has multiple angle adjustment effects in terms of up and down and left and right, enabling the camera to complete multimodal adjustment work and have a multimodal adjustment effect of shooting angle, effectively improving the inspection shooting effect of the camera.

The utility model discloses a foamed pearl cotton board composite device, including primary frame and secondary frame, primary frame and secondary frame mirror image opposite setting, the bottom inside of primary frame and secondary frame all is provided with linear guide groove, the linear guide groove of primary frame is rotated and is installed with ball screw through bearing, ball screw is positive and negative type thread screw rod, the positive and negative thread of ball screw all is connected with the thread block of screwing, the linear guide groove of secondary frame is fixedly installed with the guide light pole, and two sliding blocks that are adapted with the thread block are slidably sleeved on the guide light pole, and the relative two thread blocks are rotatably installed with the composite roller between the sliding block, and the bottom outer wall on primary frame is fixedly installed with servo motor, the utility model discloses can carry out dynamic spacing size adjustment according to the thickness of different pearl cotton board, so it can be applicable to the pearl cotton board of different thickness and carry out composite processing uses, has good composite size adjustability, and the structure uses more nimble, and the adjustment is convenient.

The utility model relates to cleaning machine equipment field discloses a kind of high-pressure gas cutting pipes of external type height-adjustable for cleaning machine, comprising: high-pressure gas cutting pipe, height adjusting mechanism is provided on the high-pressure gas cutting pipe;The height adjusting mechanism includes main frame, vertical support, screw rod, self-locking screw rod, threaded sleeve, guide rod and sliding sleeve;The vertical support is fixedly installed on main frame, the screw rod is fixedly connected with high-pressure gas cutting pipe, the screw rod is clamped with vertical support, the self-locking screw rod is threadedly connected with threaded sleeve, the threaded sleeve and sliding sleeve are fixedly installed on main frame, the sliding sleeve is slidably arranged on the outside of guide rod.The utility model has following advantages and effects: the height of gas cutting pipe can be flexibly adjusted, so that the nozzle can be as close to the workpiece as possible, while avoiding interference with the workpiece movement, ensuring that the ejected fluid can act on the workpiece surface with appropriate pressure, significantly improving the cleaning effect, and being able to adapt to workpieces of different heights.

The utility model relates to the technical field of environment monitoring, and discloses an environment detection unmanned ship which comprises an unmanned ship body and a detection assembly, a slipway is fixedly installed at the top end of the unmanned ship body, the detection assembly is fixedly installed at the position, close to the front end, of the top end of the unmanned ship body, and a wind driving mechanism is arranged at the top end of the slipway; the wind-driven mechanism comprises a rotating shaft, by arranging the wind-driven mechanism, birds and other birds can be well repelled and threatened during operation detection of the unmanned ship, the birds are prevented from staying on the unmanned ship body, guano or foreign matter is prevented from being left, normal detection of the unmanned ship and detection accuracy are prevented from being influenced, and the subsequent cleaning difficulty of personnel is reduced; the problems that due to the fact that an existing environment detection unmanned ship is not provided with a bird repelling structure, birds possibly stay on a ship body when the unmanned ship is used, normal detection and use of the unmanned ship are affected, and the follow-up cleaning difficulty of personnel is improved are solved.

This utility model discloses a single crystal rod clamping mechanism, including a base, a threaded rod mounted on the base via bearings, a rotating disk fixedly mounted on the right end of the threaded rod; a guide post fixedly mounted inside the base; a moving block screwed onto the outside of the threaded rod; a fixing sleeve fixedly mounted above the moving block, with an insert post fixedly mounted inside the fixing sleeve; an insertion rod inserted into the inside of the fixing sleeve, with a connecting block fixedly mounted between the insertion rod and a clamping ring; a first limiting assembly mounted on the side of the fixing sleeve, comprising a first track, a first T-shaped slider, a connecting block, an end plate, a spring, a handle, a screw, and a threaded sleeve; and a support plate fixedly mounted above the base. This mechanism facilitates the disassembly of the clamping ring and allows for replacement with clamping rings of other sizes, enabling the product to clamp single crystal rods of different sizes, thus minimizing limitations and broadening its applicability.

The utility model discloses a single crystal silicon rod clamping mechanism of a zone-melting single crystal furnace in the technical field of zone-melting single crystal furnaces, which comprises a fixed base and three groups of positioning rods, mounting parts are arranged at the tops of the three groups of positioning rods, a machine box is mounted at the tops of the mounting parts, a gear is rotatably connected to the inner wall of the machine box, and a movable toothed plate is connected to the outer wall of the bottom end of the gear in a meshed manner; the two ends of the movable toothed plates penetrate through the two ends of the machine box, mounting bases are connected to the bottoms of the movable toothed plates, clamping mechanisms are arranged in the mounting bases and comprise bearing plates, side plates are arranged on the outer walls of the two ends of each bearing plate, rotating shafts are rotationally connected between the two side plates, the rotating shafts are sleeved with rolling columns, and the positions of the rolling columns at the bottoms of the three movable toothed plates are adjustable. Single crystal silicon rods with different sizes in the zone-melting single crystal furnace can be clamped, the use limitation is small, and the application range is wide; and moreover, the clamping mechanism can be quickly disassembled and assembled, the clamping mechanism is convenient to replace, and the production cost is saved.

The invention relates to the technical field of fire fighting equipment, in particular to a server room security alarm which comprises an alarm body, a mounting plate, locking bolts, a side plate, a rotating shaft, a sealing door, a shell, an iron sheet, a magnetic block, a clamping assembly, a fixing assembly, an elastic assembly and a buzzer assembly. A shell is arranged at the front end of the mounting plate, a square opening is formed in the front end of the shell, two pairs of side plates are arranged at the front end of the shell, a set of rotating shafts is rotationally arranged between each pair of side plates, a sealing door is installed on each set of rotating shafts, a set of iron sheets are arranged on each set of rotating shafts, and two sets of magnetic blocks are arranged at the bottom end of the shell. The device further comprises a clamping assembly, an elastic assembly, a buzzer assembly and a fixing assembly, the clamping assembly is arranged at the top end of the shell, the clamping assembly is used for sealing the square opening of the two sealing doors, and the elastic assembly is used for releasing sealing of the square opening of the two sealing doors. The flexibility is improved, and the use limitation is reduced.