67results about How to "Convenient positioning work" patented technology

The jig 1 is used for positioning an inner tube and a transition piece of a combustor for a gas turbine when assembling the combustor. The jig 1 has the alignment member 2 that is inserted into the transition piece when positioning the transition piece to determine an installation position of the transition piece. The alignment member 2 has an outer circumferential shape which is substantially the same as an inner circumferential shape of the transition piece.

The invention provides a composite positioning device and method for a chassis foundation large-size component and an FE end of multiple units, and belongs to the field of assembly welding positioning auxiliary devices and application methods for chassis foundation large-size components and FE end components of multiple units. The composite positioning device comprises an FE end positioning tool, a chassis center line positioning tool and multiple boundary beam middle lateral tightening mechanisms, wherein the FE end positioning tool is used for clamping and positioning an FE end of a chassis, the chassis center line positioning tool is used for positioning a center line of the chassis in the length direction and the center of the chassis, and the boundary beam middle lateral tightening mechanisms are used for positioning the middles of boundary beams of the chassis. The FE end positioning tool of the composite positioning device can be modularly produced in batches, overhauling and maintenance are facilitated, production cost is reduced, the composite positioning device becomes a basis component of assembly line work, and a new subsequent process method of integrated machining after chassis assembly welding can become possible. The subsequent new method can effectively guarantee chassis geometric sizes and is beneficial to improving the product manufacturing precision and forming quality.

The invention discloses a recycling treatment device for waste dry batteries. The recycling treatment device comprises a support frame, a fixed die, a rotating shaft, a first motor, a rotating wheel, a feed hopper, a separating device and a transmission device, wherein battery grooves for accommodating the dry batteries are formed in the circumferential edge of the rotating wheel; the transmission device comprises a second motor, a jacket shell, a screw rod, a transmission jacket and a rotation limiting mechanism; the separating device comprises a push rod and a pushing die; a first cavity is arranged in the push rod; an air inlet is formed in the side wall of the push rod; the air inlet is communicated with an external pressure air source; a second cavity communicated with the first cavity is formed in the pushing die; a stamping die is mounted in the second cavity; a limiting part for limiting the stamping die is arranged on the inner side wall of the bottom of the pushing die; a third cavity for the inner cores of the dry batteries to pass through is formed in the fixed die. The recycling treatment device can preferably complete the separation of the outer shells and the inner cores of the waste dry batteries, so that the recycling efficiency of the waste dry batteries is obviously improved.

The invention discloses a high-voltage switch cabinet partial discharge positioning detection system and detection method. Four TEV sensors are adopted to form a sensor group. Partial discharge signals of four positions of the cabinet surface of the high-voltage switch cabinet are collected in a square arrangement mode. A pulse source direction judging unit is combined to judge the sequence of thepartial discharge pulses reaching the four TEV sensors so as to judge the source direction of the partial discharge pulse signal; partial discharge pulse signals are obtained in a square arrangementmode that four TEV sensors form a sensor group in a fast and concise manner, software processing does not need to be carried out on the partial discharge pulse signal; the pulse source direction judgment unit is used for judging the arrival sequence of the TEV sensor signals, and the sensor signals do not need to be compared through a software method any more, so that the use of an ultrahigh-speedacquisition chip is avoided, the positioning work is facilitated, the working process is simplified, the detection efficiency is improved, and the positioning accuracy is improved.

The invention discloses a vehicle-mounted air-conditioning assembly of a new energy vehicle which is convenient to install, including a support seat, two mounting grooves are symmetrically arranged onthe top of the support seat, an air conditioning body is arranged on the top of the support base, two mounting bases are symmetrically and fixedly mounted on the bottom of the air conditioning body,the bottom of the two mounting bases extend into corresponding mounting grooves, the two mounting seats are provided with trapezoidal clamping grooves on the side which is far away from each other, The two mounting grooves are provided with a first groove on the inner wall on the side which is far away from each other, a second groove is provided on the inner wall on the side which is far away from each other, a support block is slidably installed in the second groove, and a trapezoidal clamp block located in the corresponding trapezoidal clamp groove is fixedly installed on the side where thetwo support blocks are close to each other. The invention has the advantages of simple operation, time-saving, labor-saving and strong practicability, can quickly install the air-conditioning body, and simultaneously improves the maintenance efficiency of the air-conditioning body.

The invention discloses a ventilator pipeline connection fixing device used for coal mining. The device includes a pipeline main body, the two sides of the outer part of the pipeline main body are connected with a supporting ring cover through first fastening bolts, the lower portion of the pipeline main body is connected with the bottom of the supporting ring cover through a damping spring, the bottom of the supporting ring cover is integrally connected with a fixing sleeve, the bottom of a sliding base is provided with a moving ball, the upper portion of the sliding base is connected with the base through a second fastening bolt, a second sliding groove is formed in the surface of the upper portion of the base, and a moving ball is arranged in the second sliding groove. When the ventilator pipeline connection fixing device used for coal mining is in use, the connection parts between pipelines can be well moved and positioned, the whole process is mostly formed automatically, and thusworkload of workers can be greatly reduced.

The invention discloses a positioning device for machining a cam shaft and a cam by a milling machine. The positioning device comprises a fixing table, two fixing columns are welded at the bottom of the fixing table, two positioning device bodies are symmetrically arranged at the top of the fixing table, grooves are formed in the sides, close to each other, of the two positioning device bodies, positioning rods are installed in the grooves in a sliding mode, one ends of the positioning rods extend out of the grooves, and positioning clamping blocks are welded to the ends, close to each other,of the two positioning rods; and first rotating shaft grooves are formed in the ends, located in the grooves, of the positioning rods, first rotating shafts are rotationally installed in the first rotating shaft grooves, one ends of the first rotating shafts extend out of the first rotating shaft grooves, second rotating shaft grooves are formed in the inner walls of the sides, far away from the positioning rods, of the grooves, and the second rotating shaft grooves are rotationally connected with the first rotating shafts. According to the positioning device, the structure is simple, the useis convenient, through the positioning device bodies, the positioning work can be more conveniently carried out, moreover, connecting rods can be easier to fix, the operation is easy, the time is saved, and the use by people can be facilitated to a greater degree.

The invention relates to an elevator, including a hoistway (1); an elevator car (2); a counterweight (3); a guide rail (4); a guide rail (5); a ladder (L1-L3); and a car position detection device (7, 10). The car position detection device (7, 10) includes a detector device (7); and a pairing device (10). Each said mating device (10) includes an elongated support arm (12); a mounting base (15); and a first mating member (11). Each pairing device (10) includes a fixing device for fixing the elongated arm segment (12a) on the guide rail (4, 5), the fixing device includes a first fixing clamp (40); a second a fixed clamp (50); and fastening means (42a, 42b; 52a, 52b) for immovably fastening the fixed clamp (40; 50) to the elongated arm section (12a), said fastening means (42a, 42b; 52a, 52b) are fastenable and releasable.

The invention discloses a standardized D-series high-speed train chassis combined positioning device and a positioning method thereof, and belongs to the field of standardized D-series high-speed train chassis large part whole installing and welding positioning auxiliary devices and using methods thereof. The positioning device comprises an FE end positioning tooling, an end chassis positioning tooling, a chassis center line positioning tooling and a plurality of side beam middle lateral jacking mechanisms. According to the combined positioning device, the parts such as the FE end positioning tooling and the end chassis positioning tooling can realize modular mass production, are convenient to overhaul and maintain, reduce the production cost, become base parts of assembly line work, and make a following process new method possible that a chassis is installed and welded and then machined overall; and the following whole machining method can effectively guarantee the geometrical size of the chassis, the position size of a floor doorway, the diagonal size of the chassis, the whole length of the chassis and the like, and is more advantageous to improve product manufacturing precision and forming quality.

The invention discloses a packaging device for packaging paper cases in sequence. The packaging device comprises a working box. A working cavity is formed in the working box, an electric push rod is fixed to the inner wall of the upper side of the working cavity, and moving plates which are connected to the left inner wall and the right inner wall of the working cavity in a sliding mode and are inbilateral symmetry are fixed to the lower side of the electric push rod. The device is used for overturning and covering paper covers of paper cases with side lengths in different proportions, the device can adapt to the paper cases with different sizes, the centers of the paper cases can be located at a determined position, and positioning work of the paper covers is facilitated. The device canensure that the two paper covers which are far away from each other are covered firstly without using an inductor, so that the two paper covers which are close to each other are covered later, the structure is simple, and the operation is easy.

The invention relates to a shear wall formwork supporting system, and particularly provides a building shear wall formwork supporting system. The building shear wall formwork supporting system comprises a plurality of splice formworks, connecting pieces extend from the left side and the right side of each splice formwork, the splice formworks which are transversely adjacent are connected through first connecting components, and the splice formworks are fixed to the ground through second connecting components. The splice formworks which are longitudinally adjacent are connected through positioning pieces, and the first connecting components are inserted into connecting grooves in connecting pieces adjacent to every two adjacent splice formworks. Each second connecting component comprises aplurality of connecting rods, each connecting rod is of a telescoping structure with the length capable of being adjusted, and a plurality of insertion pieces of an E-shaped structure are fixedly arranged on the connecting rods and correspond to the splice formworks. The building shear wall formwork supporting system is used for improving the building efficiency of the splice formworks of a shearwall, and gaps are prevented from being generated when the splice formworks are connected.

The invention discloses a novel recovery processing device of a waste dry battery. The recovery processing device comprises a support rack, a battery shell broken device, a sorting device, a fixed mould, a rotation shaft, a first motor, a runner, a feeding hopper, a separation device and a transmission device, wherein battery grooves used for accommodating the dry battery are formed at the circumferential edge of the runner, the transmission device comprises a second motor, a shell, a screw rod, a transmission sleeve and a rotation limiting mechanism, the separation device comprises a push rod and a push mould, a first cavity is arranged in the push rod, an air inlet is formed on the side wall of the push rod and communicated with outside pressure air source, a second cavity is arranged in the push mould, a punch die is arranged in the second cavity, a limitation part used for limiting the punch die is arranged on the inner side wall at the bottom of the push mould, and a third cavity for the inner core of the dry battery to pass through is formed on the fixed mould. By the novel recovery processing device, the job of separation of the shell and the inner core of the waste dry battery can be fulfilled better, and the recovery efficiency of the waste dry battery can be significantly improved.

The invention discloses probe disinfection equipment for the ultrasonic department, and belongs to the technical field of medical disinfection instruments. The probe disinfection equipment comprises a disinfection box body, a clamping and adjusting assembly, a cleaning and disinfecting assembly, a collecting assembly, a plurality of disinfection lamps and a drying lamp; the clamping and adjusting assembly is arranged in the disinfection box body, the clamping and adjusting assembly comprises a partition plate and a rotating disc, the rotating disc is arranged on the upper surface of the partition plate and rotationally connected with the partition plate, a placing table is fixedly arranged in the middle of the upper surface of the rotating disc, and inclined flow guide surfaces are arranged at the two sides of the upper surface of the rotating disc; the cleaning and disinfecting assembly is arranged at the top of the disinfecting box body; the collecting assembly is arranged at one side of the disinfection box body; the plurality of disinfection lamps are arranged on the inner wall of the disinfection box body; the drying lamp is arranged at one side of the inner wall of the disinfection box body. Therefore, the protective property on a patient can be improved, cross infection is avoided, meanwhile, the disinfection effect on a probe is good, and the efficiency is high.

The invention belongs to the technical field of shoe mold production, and in particular relates to PVC injection shoe mold processing equipment. The PVC injection shoe mold processing equipment comprises a base. Two first supporting plates are symmetrically and fixedly mounted on the top of the base, a same placing seat is fixedly mounted on the tops of the two first supporting plates, a screw isarranged between the placing seat and the base, two ends of the screw are rotatably connected to the two first supporting plates, separately, a motor is fixedly mounted on the top of the base, a rotary shaft is fixedly mounted on an output shaft of the motor, a first belt wheel is fixedly arranged on the outer side of the rotary shaft in a sleeving manner, a second belt wheel matched with the first belt wheel is fixedly arranged on the outer side of the screw in a sleeving manner, a same belt is arranged on the first and second belt wheels in a sleeving manner, and two first supporting blocksare arranged on the outer side of the screw with threads in a sleeving manner. The PVC injection shoe mold processing equipment provided by the invention is high in practicality and convenient to operate, and can position and clamp a PVC injection shoe mold quickly, so that the PVC injection shoe mold is processed conveniently, and the PVC injection shoe mold processing efficiency is improved.

The invention discloses a special-shaped cable bent tower decorative plate mounting device which comprises a lower-layer fixed operation platform, a lower-layer movable operation platform, an upper-layer fixed operation platform, an upper-layer movable operation platform, two sets of safety crawling ladders, a supporting frame, a limiting mechanism, a supporting steel plate and the like. The invention further discloses a mounting construction method of the special-shaped cable bent tower decorating plate, the mounting device is connected with the special-shaped cable bent tower decorating plate through the pin shaft, a constructor enters the platform of the mounting device from the tower top, and the special-shaped cable bent tower decorating plate and the mounting device reach the to-be-mounted area of the special-shaped cable bent tower decorating plate; and a constructor connects the special-shaped cable bent tower decorative plate with the cable bent tower embedded part through theoperation platform. The installation device is simple in structure, composed of components, easy to machine and convenient to assemble quickly. The construction method is high in applicability and easy to operate, working hours are saved, and cost is reduced.

The invention discloses a robot ejection connecting structure with a stable butt joint function for storage and freight transport. The robot ejection connecting structure comprises a storage robot main body, a goods shelf main body, a lifting column and bolts, a bottom plate is arranged over the storage robot main body, the bottom plate is welded and fixed to the outer surface of the bottom end ofthe goods shelf main body, the lifting column is arranged in the center of the storage robot main body, the top surface of the lifting column is fixedly connected with the center of the bottom surface of a supporting plate, and the supporting plate is located in a first connecting groove. According to the robot ejection connecting structure with the stable butt joint function for storage and freight transport, the storage robot main body controls the supporting plate and a top plate to ascend and descend through the lifting column, so that the supporting plate conveniently pushes the top plate to slide into a positioning hole for clamping, meanwhile, a limiting shaft can slide into a limiting groove for clamping connection through pushing of elastic force of a connecting spring, the overall positioning work of the goods shelf main body is facilitated, and therefore the goods shelf main body is prevented from shaking during subsequent transportation.

The invention discloses an unmanned aerial vehicle wireless charging device design. The unmanned aerial vehicle wireless charging device comprises anti-slip supports, a bottom plate, a lifting component, unmanned aerial vehicle supporting frames and a charging module. The anti-slip supports are welded to the lower surface of the bottom plate, positioning component mounting plates are welded to theupper surface of the bottom plate, and the unmanned aerial vehicle supporting frames are mounted at upper middle positions of the positioning component mounting plates. Infrared transmitting devicesare mounted at top ends of the unmanned aerial vehicle supporting frames, and an infrared receiving device is mounted on one side of the upper surface of each positioning component mounting plate. Thelifting component is arranged at the upper middle position of the bottom plate, a lower connector is arranged at the bottom end of the lifting component, two first folding rods are arranged on one side of the lower connector, and two second folding rods are arranged on the other side of the lower connector. A rotating rod is mounted at an output end of a rotating motor which is arranged on one side of the lifting component. By the unmanned aerial vehicle wireless charging device design, intelligent operation of vertical movement of the charging module can be realized, and accordingly unmannedaerial vehicle charging efficiency is improved, and convenience in unmanned aerial vehicle charging is achieved.

The invention discloses a rotation control mechanism of a rotary welding device. The rotation control mechanism of the rotary welding device includes a support frame, a welding machine case, a rotating shaft and a clamping platform; the left side of the support frame is fixedly installed with the welding machine case; a top bearing of the support frame is connected with the rotating shaft; a fixing plate is welded and installed on the outer surface of the rotating shaft, and the clamping platform is fixedly installed on the top surface of the fixing plate; the right end of the rotating shaft is connected to the center of a turntable, and the interior of the turntable is provided with a receiving groove; a connecting spring is installed in the receiving groove; and the top end of the connecting spring is fixedly connected to a connecting block. According to the rotation control mechanism of the rotary welding device, the staff can pull a connecting shaft to make the connecting shaft drive the connecting block for a contraction operation, so that the follow-up staff can turn the connecting shaft to make the connecting shaft drive the turntable for a rotation operation, which is convenient for the operation and use of the staff, and meanwhile improves the comfort during operation.

The invention discloses a rib fracture orthotopic fixing device for a thoracic surgery department. The device comprises a supporting plate; a first movable groove is formed in the outer side wall of the supporting plate; a movable block and a first adjusting device for driving the movable block to move frontwards and backwards are arranged in the first movable groove; a movable plate is fixedly connected to the outer side wall of the movable block; a second movable groove is formed in the outer side wall of the movable plate; and a moving plate and a second adjusting device for driving the moving plate to move up and down are arranged in the second movable groove. Through mutual cooperation of the supporting plate, the first movable groove, a servo motor, a first threaded rod and the movable block, the first threaded rod can be driven to rotate forwards and backwards through forward and reverse rotation of the servo motor, so that the movable block moves forwards and backwards along the first threaded rod, the position of the movable plate is integrally adjusted, a positioning plate can be accurately positioned to a fracture part, and the convenience is brought to the accurate positioning work of a medical staff.

The invention discloses a special-shaped column device for a fabricated steel structure building, and relates to the technical field of steel structure buildings. The special-shaped column device comprises a special-shaped column body, a first cross beam and a second cross beam are correspondingly and movably arranged on the two sides of the special-shaped column body, a fixing box is fixedly arranged on the surface of the special-shaped column body, a first limiting device and a second limiting device are arranged in the special-shaped column body, a positioning rod extending into the special-shaped column body is movably arranged in the fixing box, and releasing devices are correspondingly at the two ends of the positioning rod. The first cross beam and the second cross beam are inserted into the special-shaped column body, so that the first cross beam and the second cross beam correspondingly press the first limiting device and the second limiting device, so that a first limiting block and a second limiting block descend firstly and then ascend, the tops of the first limiting block and the second limiting block enter the first cross beam and the second cross beam correspondingly, the primary limiting effect is achieved, and thus subsequent positioning work is facilitated.

The invention discloses an automatic trademark die cutting machine based on artificial intelligence, which is characterized in that a material picture is acquired through an industrial camera, then the position of each trademark image is determined by establishing a coordinate system with a stable position, and specifically, the subsequent transmission distance is determined by determining the distance between two trademark images; by determining the deviation degree of the material and the deviation degree of the image position on the material in the direction perpendicular to the material conveying direction and adjusting the position of the cutter head, the shearing precision in the direction perpendicular to the material conveying direction is guaranteed, and compared with manual adjustment in the prior art, the shearing precision in the direction perpendicular to the material conveying direction is guaranteed. The effect of non-stop real-time adjustment can be achieved, the product quality is guaranteed, and meanwhile the production efficiency can be improved.

The invention discloses an improved recovery processing device for waste dry batteries. The improved recovery processing device comprises a support frame, a battery shell cracking device, a fixed mold, a rotation shaft, a first motor, a rotation wheel, a feeding hopper, a separation device, and a transmission device, wherein a battery slot containing the dry batteries is formed in the edge of the circumference of the rotation wheel; the transmission device comprises a second motor, a sleeve shell, a spiral rod, a transmission sleeve, and a rotation limiting mechanism; the separation device comprises a pushing rod, and a pushing mold; a first cavity is arranged in the pushing rod; an air inlet is formed in the side wall of the pushing rod; the air inlet is communicated with an outside pressure air source; a second cavity communicated with the first cavity is arranged in the pushing mold; a stamping mold is arranged in the second cavity; the inner side wall at the bottom of the pushing mold is provided with a limiting part which is used for limiting the stamping mold; a third cavity through which inner cores of the dry batteries can penetrate is arranged on the fixed mold. The improved recovery processing device can be used for separating shells and the inner cores of the waste dry batteries relatively well, and the recovery efficiency of the waste dry batteries is obviously improved.

The invention relates to an elevator, including a well hole (1), an elevator car (2), a counterweight (3), a guide rail (4), a guide rail (5), a landing (L1-L3), and car position detection devices (7, 10). The car position detection devices (7, 10) include detector devices (7) and pairing devices (10). Each pairing device (10) comprises a thin long support arm (12), a mounting base (15), and a first pairing member (11). Each pairing device (10) comprises a fixing device for fixing a thin long arm section (12a) on the guide rails (4, 5). The fixing device comprises a first fixing clamp (40), a second fixing clamp (50), and fastening devices (42a, 42b, 52a, 52b) which fasten the fixing clamps (40, 50) onto the thin long arm section (12a) unmovably. The fastening devices (42a, 42b, 52a, 52b) can be fastened and released.

The invention discloses a sewage treatment integrated waste water pool which comprises a pool body, an aeration pipe device, a pool cover, a sewage outlet pipe, an agent adding pipe, a goods elevatorplatform, a sunshade, an agent adder, an alkaline agent pot, a positioning slot, a connecting pipe, a ventilating hose, a carrying platform, an acidic agent pot, a hydraulic lifting rod, a ladder stand and a sewage inlet pipe. The sewage treatment integrated waste water pool has the advantages that the production environment is improved, human health is protected, the corrosion speed of equipmentaround the waste water pool is reduced, and enterprise losses are reduced. By means of the agent adding pipe, acid-base agents do not need to be added from a top end opening. Pipeline cleaning and replacing are very convenient, operation is easy, and the aeration effect is guaranteed. The use safety of the acid-base agents is improved. By means of the goods elevator platform, replacing or replenishing of the acid-base agents at the top end of the carrying platform is convenient, and by means of the ladder stand, a worker can conveniently climb to the top end of the carrying platform to work. The sewage treatment integrated waste water pool is simple in structure, convenient to use and mount and easy to popularize.

The invention discloses a positioning method and a positioning device for red point real-time positioning anchor nodes. The positioning method comprises the following steps of building communication connection with a server; obtaining reference point position information input by a user; using the reference point as an origin; obtaining recognition information of anchor nodes to be measured; measuring distance information between the anchor nodes to be tested and the reference points; uploading the recognition information of the anchor nodes to be measured, the reference point position information and the distance information between the anchor nodes to be measured and the reference point to the server. The anchor nodes to be measured are further recognized while the recognition information is obtained; the distance information from the anchor nodes to the specific origin can be measured; the recognition information, the origin position information and the distance information betweenthe anchor nodes to be measured and the origin are uploaded to the server; the former artificial recording trouble is omitted, so that the positioning work of the anchor nodes is more convenient.

The invention discloses cutting equipment for steel wire woven rubber hoses, relates to the technical field of rubber hose cutting, and aims to solve the problem that in the cutting process, after each rubber hose is cut, the length of the rubber hose needs to be manually measured, then the rubber hose is cut, and the rubber hose needs to be manually supported for cutting. A winding assembly is arranged on the upper surface of the rear side of the workbench, a cutting assembly is arranged at the position, located in front of the winding assembly, of the upper surface of the workbench and comprises a shell base fixedly connected to the upper surface of the workbench, and a hollow cylinder is arranged on the upper surface of the shell base. And a cutting piece is arranged on the upper surface of one end of the hollow cylinder. According to the cutting equipment for the steel wire braided rubber hose, when the rubber hose is cut, the length of the rubber hose needing to be cut can be automatically measured, the rubber hose does not need to be manually measured section by section, and therefore the labor intensity of workers is reduced.

The invention discloses an easy-to-assemble modular installation structure for an industrial instrument. The easy-to-assemble modular installation structure comprises a measuring meter head, a measuring pipeline and a connecting pipeline; wherein the measuring meter head is fixed on a pipe wall of the measuring pipeline, fixed mounting heads are arranged at two ends of the measuring pipeline, andmovable mounting heads matched with the fixed mounting heads are arranged at the end parts of the connecting pipeline; two threaded holes penetrating through the outer walls of the fixed mounting heads are symmetrically formed in the fixed mounting heads in the radial direction, and threaded columns are in threaded connection with the threaded holes; the top ends of the threaded columns are fixedly connected to the bottoms of rotating discs through connecting rods, and rotating seats are fixed on the rotating discs. The bottom ends of the threaded columns are fixed to the outer walls of arc-shaped sealing plates, the outer walls of the arc-shaped sealing plates are matched with the inner walls of the measuring pipeline and the connecting pipeline in an attached mode, clamping heads are arranged at two ends of the arc-shaped sealing plates in the axial direction, and clamping grooves matched with the clamping heads are formed in the inner walsl of the measuring pipeline and the connecting pipeline. According to the invention, the positioning and mounting work of the industrial instrument can be conveniently and quickly completed.

The invention discloses a special-shaped column device for an assembled steel structure building, and relates to the technical field of steel structure buildings. Including the special-shaped column body, the first beam and the second beam are movable on both sides of the special-shaped column body, the surface of the special-shaped column body is fixedly provided with a fixed box, and the inside of the special-shaped column body is provided with a first limiting device and a second limiting device. Positioning device, the internal activities of the fixed box are provided with positioning rods extending to the inside of the special-shaped column body, and the two ends of the positioning rods are respectively provided with unlocking devices. By arranging the first beam and the second beam to be inserted into the inside of the special-shaped column body, the first beam and the second beam will respectively press the first limiter and the second limiter, so that the first limiter and the second limiter The blocks will descend first and then rise, so that the tops of the first and second limit blocks enter the insides of the first beam and the second beam respectively, achieving the effect of preliminary positioning, which facilitates the follow-up positioning work.