40results about How to "Easy and efficient assembly" patented technology

The utility model discloses an assembled building integrated solar photovoltaic power generation device, which relates to the solar photovoltaic field and comprises a main supporting rod, a top horizontal groove is horizontally arranged on the top surface of the main supporting rod, side mounting holes are symmetrically arranged on the side edges of the main supporting rod, two ends of the main supporting rod are in butt joint with sealing end plates, and the sealing end plates are in butt joint with the top horizontal groove. Fixing screw rods are symmetrically inserted into the side edges of the sealing end plate, a main supporting plate is horizontally in butt joint with the top surface of the main supporting rod, a solar panel is horizontally and fixedly arranged on the top surface of the main supporting plate, a bottom butt joint rod is vertically and downwards in butt joint with the bottom surface of the main supporting rod, and a bottom sleeving rod vertically sleeves the bottom end of the bottom butt joint rod; limiting through holes are symmetrically formed in the side edges of the bottom sleeving rod, a mounting bottom plate is horizontally welded to the bottom end of the bottom sleeving rod, a buckle type connecting structure is adopted so that the split structure can be more convenient and efficient during splicing, and meanwhile the adjustable structure can meet the requirement for mounting and using in various environments.

The invention provides a cross beam matching prefabricating mold and a construction method thereof, a bottom mold is arranged on a movable trolley, the movable trolley is arranged on a track, a fixed end mold frame is arranged at one end of the bottom mold, a movable end mold frame is arranged at the other end of the bottom mold, and outer side mold frames are arranged on the two sides of the bottom mold; the outer side mold frames and the movable end mold frames on the two sides are connected with the mold plate through demolding lead screws. A movable inner core mold frame is further arranged in the bottom mold. Through the reasonable mold structure design, such as the connection mode of all parts and the arrangement of the demolding lead screw, the operation of assembling, adjusting, demolding and the like of the mold is more convenient and efficient, so that the labor intensity of workers in the construction process is reduced, and the construction efficiency is improved.

The invention relates to the technical field of photovoltaic support installation auxiliary devices, in particular to a positioning and assembling bracket for photovoltaic support installation, which comprises a bottom support assembly for horizontally supporting a photovoltaic support body to be assembled; the two side assembling parts are symmetrically installed on the two sides of the bottom support assembly and comprise side positioning frames horizontally moving in the directions of the two sides of the bottom support assembly, a cross beam rod is installed between the two side positioning frames in an inserted mode, and each side positioning frame is provided with a clamping unit; according to the positioning and assembling bracket for photovoltaic support installation, a to-be-assembled vertical rod structure can be rapidly and stably clamped through the arranged side assembling part, the matched bottom supporting assembly can be suitable for circular hoops of different specifications, the circular hoops and a vertical rod are installed in an aligned mode, and the positioning and assembling bracket is high in adjustability and wide in application range; the photovoltaic support body can be rapidly assembled in a vertical mode, a horizontal assembling mode is not adopted, the problem of rotation and displacement of the photovoltaic support structure can be avoided, and the device is convenient and efficient to assemble and has practicability.

This invention provides an infrared heating welding cutting device, comprising an infrared heating welding mold and a cutting module slidably mounted on the upper end of a device base, wherein the sliding direction of the infrared heating welding mold and the cutting module is perpendicular to the axial direction of the pipe to be welded; an infrared heating module mounting plate is slidably disposed on the device base, and a quick-change fixture is slidably mounted on the upper end of the infrared heating module mounting plate, with the infrared heating welding mold mounted on the upper end of the quick-change fixture; the cutting module includes a mounting frame disposed on the cutting module mounting plate and a blade assembly mounted on the mounting frame, and a grinding component mounted within the mounting frame; the blade assembly includes a fixed blade and a movable blade, wherein the sliding direction of the movable blade is perpendicular to the axial direction of the pipe to be welded; the grinding component includes a base vertical plate slidably disposed within the mounting frame, with a grinding wheel mounted on the base vertical plate; the forward and backward movement of the movable blade and the grinding component is driven by a drive unit with only one power source, and the moving directions of the movable blade and the grinding component are opposite.

The utility model discloses a kind of multifunctional stall box and its row display structure, the stall box is hollow hexahedron structure, including main box and the box door hinged with main box through hinged component;The main box adopts the box type structure of top opening, including bottom support pedestal, front facade and rear facade located main box front and back side and as display surface and left end face and right end face located main box left and right side, the left and right sides of the front facade are respectively provided with the card cloth groove extending along vertical direction.This utility model can quickly install or replace advertising cloth and decorative surface material by setting card cloth groove on the two sides of front facade, adapt to diversified display needs;Box door is connected with main box through hinged component, can be used as stable table top when covering, without additional configuration operating platform;Combined with hollow design in main box, effectively realize article storage, display and operation multifunctional integration, realize function high integration, improve space utilization.

A supporting shaft thread is arranged on the circumferential face of the left end of a supporting shaft, a supporting shaft locking notch is formed in the upper portion of the left end face of the supporting shaft, and an inner hole thread of a gear ring supporting disc and the supporting shaft thread are installed at the left end of the supporting shaft in a thread fit mode. The right end face of the gear ring supporting disc is attached to the left bearing. The locking gasket is fixed to the gear ring supporting disc through the upper screw and the lower screw, it is ensured that the locking gasket is clamped into the supporting shaft locking notch so that the effect of preventing the threads from loosening can be achieved, and a wheel edge bearing pre-tightening structure matched with the threads is formed. The hub reduction gear assembly is simple and compact in structure, convenient and efficient to assemble, low in manufacturing and maintenance cost and reliable in operation, and solves the problem that the manufacturing and maintenance cost of a drive axle is increased due to tedious assembly and material management when an adjusting gasket is adopted to control the bearing clearance of the hub reduction gear assembly in the prior art.

The utility model discloses a dustproof structure for a steering axle master pin of a wheel excavator. The dustproof structure comprises a steering knuckle, a master pin, a bolt, a sealing ring, a bearing, an axle sleeve and an axle housing, the main pin is fixed on the steering knuckle through a bolt; the bearing is arranged in a main pin hole of the axle housing and plays a supporting role; the shaft sleeve is arranged in a main pin hole of the axle housing to achieve a wear-resistant effect; the sealing ring is arranged on the lower portion of the bearing, and a rubber lip of the sealing ring seals the bearing in the axle housing and is used for isolating the bearing from the external environment and preventing dust and silt from entering the bearing. The excavator steering axle is simple and compact in structure, convenient to assemble, low in manufacturing and maintenance cost and long in service life, and solves the problem that when an excavator steering axle in the prior art works in a severe working condition environment with more dust and silt, foreign matter easily enters a bearing part to damage the bearing.

The utility model discloses a safety valve structure of a gearbox of a backhoe loader. The safety valve structure comprises a box body, a valve cover, a spring, a valve core, a locking bolt and a spring washer, the box body is provided with an oil drainage hole, a main oil duct and two threaded holes, and the main oil duct is located between an oil outlet of the variable-speed oil pump and an oil inlet of the pressure regulating valve; the valve cover is provided with a valve core hole; one end of the valve core is embedded into the oil drainage hole, and the other end is sleeved on the valve core hole of the valve cover; the spring is sleeved on the valve core and is positioned in the valve cover; and the valve cover is fastened on the box body by two locking bolts and a spring washer through two threaded holes. The pressure regulating valve is simple and compact in structure, convenient and efficient to assemble and long in service life, and solves the problem that other parts are damaged due to clamping stagnation of the pressure regulating valve core caused by substandard cleanliness of hydraulic transmission oil in the prior art.

The utility model relates to medium plate technical field discloses a kind of plastic medium plates for phase shifter special, including long plate component, middle plate component, small axle component, connecting seat, second clamping slot and short plate component, long plate component is basic component, its one end is equipped with connecting protrusion and first clamping slot, and long plate component still is provided with clamping slot, middle plate component is connected with long plate component, long plate component is distributed with through slot, slot and third clamping slot, small axle component is installed in the corresponding position of long plate component, connecting seat is simultaneously installed on long plate component and middle plate component, the middle position of long plate component is provided with long groove, short plate component is connected with middle plate component, second clamping slot is respectively set on long plate component and middle plate component.The utility model is cooperated by the long plate component, middle plate component and short plate component of being set, and it is positioned and assembled quickly and accurately by connecting protrusion, clamping slot and slot structure, and additional fastener can be reduced.

The utility model provides a shifting fork assembly assembling tool, belongs to the technical field of automobile part machining equipment, aims to solve the problem that in the prior art, shifting fork assemblies of the type cannot be assembled conveniently, and comprises a support and a lifting mechanism installed on the support. The lower die is arranged on the lower portion of the upper die, the upper die is provided with a pressing column and a protection column, a protection pad is arranged on the lower portion of the protection column, the lower die is provided with at least two positioning columns, the lower die is provided with a shifting fork assembly needing to be assembled, and the shifting fork assembly is provided with a first shifting fork component and a second shifting fork component. The first shifting fork component is provided with at least two first positioning holes and at least two first pin holes, the second shifting fork component is provided with second positioning holes and second pin holes, the first pin holes and the second pin holes are the same in number and are in one-to-one correspondence, the first positioning holes and the second positioning holes are the same in number and are in one-to-one correspondence, and the second pin holes are provided with pin shafts. The positioning columns and the second positioning holes are the same in number and are in one-to-one correspondence, the pressing columns and the pin shafts are the same in number and are in one-to-one correspondence, and the lifting mechanism can drive the upper die to move downwards.

The utility model discloses a battery pack assembling structure, and relates to the technical field of assembling structures. The device specifically comprises at least one quick-mounting assembly, and each quick-mounting assembly comprises a mounting beam which can be mounted on a frame and is provided with at least two elastic ejector pins; the mounting columns are connected to the side wall of the battery pack and are in one-to-one correspondence with the elastic ejector pins, accommodating grooves are formed in the side walls of the mounting columns, and inclined chamfers which are convenient for telescopic shafts of the elastic ejector pins to slide into the accommodating grooves so as to be clamped with the mounting columns are arranged at one ends, far away from the battery pack, of the mounting columns. The utility model aims to reduce battery packaging timing errors and improve the assembly efficiency at the same time.

The utility model discloses a pre-tightening force adjusting structure for a wheel-side bearing of a loading machine. The pre-tightening force adjusting structure comprises a wheel hub, a locking gasket, a supporting shaft, a round nut and a bearing, the hub is mounted on a supporting shaft serving as a fixing piece through a bearing; the round nut is installed at the end of the supporting shaft and tightly attached to the outer end face of the bearing. The round nut is provided with four threaded holes and two through holes. The locking gasket is locked on the round nut through a bolt, 24 bolt holes are formed in the locking gasket, and a locking boss is arranged on the inner circular ring wall of the locking gasket. The device is simple and compact in structure, convenient and efficient to assemble and maintain, long in service life, high in safety coefficient and capable of obviously reducing the failure rate.

The utility model discloses an electric energy meter shell assembly structure, including bottom shell, left upper cover, right upper cover and slide lock pin. Bottom shell is equipped with the outlet hole, the connecting step and the inlay groove, left upper cover has the elastic connecting piece, the pressed part, the inlay step and the connecting groove, and the right upper cover both sides wall is equipped with the plugboard, the compression part and the lock hole, and slide lock pin is installed in the bottom shell insertion slot side wall. When assembling, left upper cover cooperates through inlay step and inlay groove, connecting groove and connecting step and bottom shell, and right upper cover plugboard inserts into insertion slot, and compression part tightens pressed part, and slide lock pin inserts into lock hole and realizes right upper cover and bottom shell locking. This structure discards screw fastening, realizes quick assembly and disassembly, and each component cooperates and forms stable connection, guarantees shell leakproofness and protective property, reduces maintenance cost, and effectively satisfies the demand of electric power industry to electric energy meter high efficiency, reliable operation.

The utility model discloses a bearing assembly structure of a fixed shaft type gearbox of a 3-ton loader. The bearing assembly structure comprises a box body, a cone bearing and a shaft, the cone bearing comprises a bearing outer ring and a bearing inner ring, the bearing outer ring is assembled in a bearing hole of the box body, the bearing inner ring is assembled on a bearing position of the shaft, and the bearing outer ring and the bearing inner ring are assembled and combined; a boss is arranged at the position, corresponding to the shaft end, of the box body, and three bearing disassembling notches are evenly formed in an end opening of a bearing hole of the box body in the circumferential direction so that a bearing can be disassembled conveniently. The bearing assembling device is simple and compact in structure, low in manufacturing and maintenance cost, convenient and efficient to assemble and reliable in quality, and solves the problem of high manufacturing and mounting cost caused by many parts involved in bearing assembling in the prior art.

The utility model discloses a kind of climbing frames for kiwi planting, it is related to kiwi field, including main support rod, the bottom end of main support rod is butt joint with inserting nail body, the side of main support rod is evenly provided with side screw hole, the top end of main support rod is butt joint with butt joint top block, the side of butt joint top block is symmetrically provided with mounting screw hole, the side of butt joint top block is butt joint with connection top rod horizontally, the side of main support rod is evenly butt joint with auxiliary sleeve, one end of auxiliary sleeve is inserted with extension end rod horizontally, the top end of main support rod is provided with top joint hole, the inside of top joint hole is symmetrically provided with buckling inner groove, the bottom end of main support rod is provided with bottom screw hole, the top end of inserting nail body is fixedly welded with mounting screw rod, using split structure makes it convenient to carry transport operation after disassembly, simultaneously in the fixed connection mode of buckle and thread let it be more convenient and efficient to assemble.

The present invention provides an antenna assembly process for antenna assembly equipment, the antenna assembly equipment includes: antenna feeding equipment, welding wire winding equipment; welding platform; laser welder; antenna transportation equipment; the process includes: step S1: the antenna feeding equipment screens the antenna, keeps the screened antenna in a preset state, and transports it to a material taking position; step S2: the antenna transportation equipment grabs the antenna at the material taking position; step S3: the antenna transportation equipment transports the antenna to the welding wire winding equipment; step S4: the welding wire winding equipment winds the welding wire around the lower part of the antenna; step S5: an anode cylinder assembly is pre-installed on the welding platform, and the antenna transportation equipment transports the antenna with the welding wire wound to the welding platform for assembly with the anode plate in the anode cylinder assembly; step S6: the laser welder welds and fixes the antenna and the anode plate. The present invention realizes the full-process automated assembly production of the antenna in the production process of the magnetron anode assembly.

The utility model discloses a loader drive axle wheel edge oil seal dust cover structure which comprises a hub, an outer cone bearing, a supporting shaft, an inner cone bearing, a brake disc bolt, a brake disc, a dust cover, an oil seal and a check ring, the inner rings of the outer cone bearing and the inner cone bearing are installed on the supporting shaft, and the outer rings are matched with the hub; the outer circle of the oil seal is assembled in an inner hole of the hub, and the inner hole of the oil seal is matched with the supporting shaft to achieve the sealing effect. The dustproof cover is tightly attached to the outside of the brake disc, the bent edge of the dustproof cover is tightly attached to and partially wraps the outer circle of the supporting shaft so as to prevent silt and pulverized coal from entering the oil seal, the dustproof effect is achieved, and the dustproof cover and the brake disc are locked and assembled on the hub through brake disc bolts. The hub oil seal is simple and compact in structure, convenient and efficient to assemble, good in sealing effect and long in service life, and solves the problems that in the prior art, a hub oil seal is in contact with pulverized coal and silt for a long time, a lip is continuously abraded, sealing of the oil seal fails, and oil leaks.

The utility model relates to the technical field of electric trucks, in particular to a battery pack for quickly assembling battery cells for an electric truck. Comprising a shell, a buckle assembly arranged in the shell and a plurality of batteries arranged in the buckle assembly in sequence; a plurality of clamping grooves are formed in the inner walls of the two sides, connected with the buckle assembly, of the shell. Clamping blocks are arranged on the two sides of the buckle assembly, and the clamping blocks are matched with the clamping grooves; the buckle assembly comprises a lower buckle arranged at the bottom of the shell and an upper buckle arranged on one side of the lower buckle; a plurality of grooves for mounting the batteries are correspondingly formed in the upper buckle and the lower buckle; and a plurality of layers of grooves are arranged. The battery pack provided by the utility model has the advantages that the capacity of the battery pack can be adjusted, the cruising ability is strong, the stability is good, the service life is long, the safety is high, the structure is simple, the disassembly and assembly are convenient, and the like.

This utility model discloses a moving spring bracket, a moving spring structure, and an electromagnetic relay. The moving spring bracket includes a fixed part and a support part arranged and opposite to each other along a first direction. The support part supports a bridge-type moving spring. The fixed part has at least one positioning part on each side of a second direction. The positioning parts on both sides of the fixed part correspond one-to-one, forming at least one set of paired positioning parts. The two positioning parts in each set are opposite to at least one bridge-type moving spring supported by the support part in the first direction, so as to provide an elastic element between the positioning part and the bridge-type moving spring. The first direction and the second direction are perpendicular to each other, and the second direction is consistent with the length direction of the bridge-type moving spring supported by the support part. The moving spring bracket of this utility model can replace the traditional contact support, providing a structural basis for realizing multi-point support of the bridge-type moving spring. This structural design helps to optimize the force distribution of the bridge-type moving spring and can significantly reduce the vibration amplitude during the breaking process.

The utility model discloses a fixing structure for a parking brake of a gearbox of a loading machine. The fixing structure comprises a gearbox body, a nut, two positioning pins, a mechanical brake caliper body, a bolt, a spring washer, a brake disc and a front flange, two cylindrical bosses are cast on the surface of the gearbox body, and each cylindrical boss is provided with an inner threaded hole. One ends of the two positioning pins are screwed and mounted in the inner threaded holes of the cylindrical boss, the other ends of the two positioning pins are in floating fit with the mechanical brake caliper body, and the inner brake pad and the outer brake pad are clamped on the two sides of the brake disc; and the brake disc is fixed with a front flange of the gearbox through a bolt and a spring washer. The fixing support is simple and compact in structure, low in manufacturing cost and easy and convenient to assemble, and the problems that in the prior art, a fixing support of a parking brake of a loader gearbox is large in assembling difficulty and high in manufacturing cost are solved.

The invention discloses a novel cable outlet structure on a locking device and an assembling method, and the structure comprises a PCBA board which is provided with an external connector. The shell is used for accommodating the PCBA board; the glue leakage prevention foam is arranged between the connector on the PCBA board and the bottom shell; and the connector throwing line penetrates through the upper cover and is connected with a connector on the PCBA board. The connector module is externally arranged, so that the problems of low assembly efficiency and poor waterproof performance caused by a built-in connector in a traditional mode are solved, particularly, during long-term use, the risk of water leakage can be effectively prevented, and due to the application of the leakage-proof glue foam and the close contact structure of the leakage-proof glue foam and the bottom shell, the sealing performance of the device is further improved, and the service life of the device is prolonged. The stable performance of the device in a severe environment is ensured, meanwhile, the waterproof and dustproof effects are improved through the processing mode of the pouring sealant, the assembly process is simplified, automatic operation can be achieved, and the production efficiency is remarkably improved.

The utility model relates to the technical field of automobile parts, and provides an end cover and a hub assembly. The end cover is used for a hub of the vehicle and comprises a matching end face and a slope face located on the inner side of the matching end face. The multiple clamping jaw pieces are arranged on the slope face at intervals, the clamping jaw pieces are provided with claw parts protruding in the radial direction, and grooves are formed in the back faces of the claw parts; and the tight supporting ring is tightly supported in the grooves of the plurality of clamping jaw pieces. When the end cover provided by the utility model is assembled with the hub, the hook claw part is clamped into the groove ring on the inner wall of the shaft hole of the hub, so that the end cover is hung on the hub; the clamping jaw piece is arranged on the slope surface capable of weakening the plastic shrinkage deformation phenomenon and can be stably clamped in the groove ring of the hub; in addition, through the grooves formed in the back faces of the hook claw parts and the tight supporting rings tightly supported in the grooves of the multiple clamping claw pieces, when the hook claw parts are clamped into the groove rings of the hub, the tight supporting rings tightly press the hook claw parts to the groove rings, the matching end face of the end cover is attached to the installation end face of the hub, and it is ensured that the end cover is in sealed fit with the hub.

The utility model relates to a connecting structure of a wave generator and an input shaft of a harmonic reducer, which comprises the wave generator and the input shaft, one end of the input shaft is provided with external spline teeth, the middle part of the wave generator is provided with a step-shaped through hole, and the wall of the through hole with the minimum aperture is provided with internal spline teeth. The input shaft is inserted into the through hole of the wave generator, and clamping springs are arranged on the two sides of the through hole, with the minimum aperture, of the input shaft in a clamped mode respectively. The spline is adopted as a main torque transmission and radial positioning mode which is obviously superior to interference fit, the spline meshing face is large, the bearing capacity is high, meanwhile, the excellent radial centering precision can be provided, the coaxiality of the wave generator and the input shaft is effectively guaranteed, the vibration and noise risks are reduced fundamentally, and the service life of the wave generator is prolonged. And the service life of the flexible gear is prolonged. In addition, the structure that double clamp springs are used for axial limiting is adopted, so that the overall structure is extremely compact and reliable, and assembling is easy, convenient and efficient.

The utility model discloses a pair of lock catch beauty forceps, which comprises a first forceps body and a second forceps body, the front end of the first forceps body is hinged with the front end of the second forceps body, the first forceps body is provided with a first forceps handle, the second forceps body is provided with a second forceps handle, and the first forceps handle and the second forceps handle are oppositely arranged. A first lock pin is arranged on the inner side face of the first plier handle, a second lock pin is arranged on the inner side face of the second plier handle, the first lock pin is detachably connected with a first lock catch elastic piece, the second lock pin is detachably connected with a second lock catch elastic piece, and the first lock catch elastic piece and the second lock catch elastic piece are connected in a buckled mode. The lock catch elastic piece and the lock pin of the pair of lock catch beauty forceps are detachably connected, the structure is simple, the assembling and disassembling processes are simple and efficient, and daily replacement and maintenance by a user are facilitated.

The invention belongs to the technical field of welding of steel structures, and discloses a spiral step ascending box-shaped steel beam construction process which comprises the following steps: step 1, setting machining allowance for each component plate according to a structure and a welding seam form; a jig frame is erected; 2, assembling the middle web plate, the wing plate, the corresponding secondary beam vertical stiffening plate and the corresponding column vertical stiffening plate layer by layer from low to high, and welding after assembling; 3, assembling and welding corresponding main beam vertical stiffening plates and node stiffening plates in a step node area; fourthly, transverse stiffening plates of the corresponding stand columns are installed and welded; fifthly, outer webs corresponding to the vertical stiffening plates of the main beam are assembled; step 6, assembling and welding a vertical stiffening plate of the step node; 7, assembling a port partition plate and a secondary beam web at the position of a secondary beam; eighthly, the remaining outer web is assembled and welded; and ninthly, secondary beams are installed and welded, field welding grooves are formed, and lug plates are assembled and welded. Assembly is convenient, welding deformation of components is well controlled, and the welding difficulty is reduced.

The utility model discloses a combination bearing and an oscillating fan, and the combination bearing comprises a rolling assembly which comprises an inner ring and a middle ring, and the middle ring is arranged around the inner ring and is in rolling connection with the inner ring; the outer ring assembly is rotationally sleeved on the middle ring and is in spherical sliding fit with the middle ring; the outer ring assembly comprises a first outer ring and a second outer ring, the first outer ring is provided with a fixing protrusion, the second outer ring is provided with a fixing groove, the fixing protrusion and the fixing groove are in interference fit through press fitting, and the first outer ring and the second outer ring are rotationally connected with the outer walls of the two ends of the middle ring respectively. The advantages of a sliding bearing and a rolling bearing are effectively combined, the middle ring and the outer ring assembly are in spherical sliding fit, and a large aligning angle is achieved; the inner ring and the middle ring are combined into a structure similar to a rolling bearing, so that the effect of generating lower noise during high-speed use is achieved; besides, the first outer ring and the second outer ring are in interference fit by adopting a press-in method, so that the assembly of the middle ring, the first outer ring and the second outer ring is realized, the assembly is efficient and convenient, and the production cost is reduced.

This utility model discloses a windshield oil removal film structure for automobiles, including: a windshield wiper and an oil removal film wipe; the oil removal film wipe is detachably mounted on the windshield wiper and is used to clean the oil film on the windshield as the wiper moves; the oil removal film wipe is a strip-shaped flexible structure with an opening extending along its length at one end, the opening being used to slide the oil removal film wipe from the opening end along the length of the windshield wiper; the oil removal film wipe is provided with a pull cord, the pull cord passing through the oil removal film wipe on both sides of the opening, and is used to tighten the pull cord to close the opening and thus fix the oil removal film wipe to the windshield wiper.

The utility model discloses a combined electric power ring main unit which comprises a wire inlet cabinet, the top end of the wire inlet cabinet is provided with a plurality of stacked switch cabinet single bodies, the top ends of the switch cabinet single bodies are provided with an instrument cabinet in a clamping mode, and each switch cabinet single body comprises a combined cabinet body and a cabinet door hinged to the front face of the combined cabinet body. The top end of the combined type cabinet body is provided with a step assembling groove, four corners of the inner wall of the step assembling groove are provided with positioning holes, the bottom end of the combined type cabinet body is fixedly provided with a bottom clamping table, and four corners of the bottom end of the bottom clamping table are fixedly provided with positioning insertion columns. The main cabinet body is formed by splicing a plurality of combined cabinets, the combined cabinet bodies can be independently disassembled and transferred in the transportation, assembly and carrying processes, assembly is simple, convenient and efficient, installation is more labor-saving and convenient, after installation, the structural strength is high, stability and reliability are achieved, looseness is not prone to occurring, and the assembly and transportation difficulty of the ring main unit can be remarkably reduced.

The invention relates to the field of oil and gas exploitation, in particular to a one-way fluid automatic cut-off device and method. Comprising a valve body, a sealing piece, an adjusting piece, an elastic piece and a valve body gland, and the sealing piece, the adjusting piece, the elastic piece and the valve body gland are arranged in the valve body. The valve body gland is connected with the valve body, an inner cavity is formed in the middle of the valve body gland, one end of the adjusting piece extends into the inner cavity, the other end of the adjusting piece is connected with the sealing piece, an elastic piece is arranged between the adjusting piece and the valve body gland, and the flow channel is set or communicated through the sealing piece. The one-way fluid automatic cut-off device is installed on a pipeline, when the pipeline leaks, accurate segmented cut-off can be achieved on the pipeline, and therefore the leakage amount is effectively controlled, it can be ensured that the pipeline has the liquid-free and pressure-free sealing function and the excessive and overpressure sealing function at the same time when conveying liquid under the condition that an external new power source is not needed, and the sealing effect is good. And the safety and the reliability of pipeline operation are greatly improved.