51results about How to "Guaranteed Squeeze" patented technology

The invention discloses a necking mold for thin-wall cylindrical parts. An upper die is provided with a mandrel and a female die; a lower die is provided with a positioning ring and a sectioned male die; the thin-wall cylindrical parts are installed in a gap between the sectioned male die and the positioning ring and a gap between the sectioned male die and the female die; the sectioned male die is divided into a plurality of sectioned dies; when the thin-wall cylindrical parts are in a necking process, the upper die is gradually combined with the lower die; the mandrel gradually extends intothe sectioned female die; the mandrel is used for pushing the sectioned male die to radially expand so as to apply pressure stress to the non-necked cylindrical wall of the part and eliminate drum-like formation of the cylindrical wall; after being expanded, the sectioned male die seamlessly clings to the part in the circumferential direction, the roundness of the part can be corrected, no waved edges are generated at the cylindrical wall, the surface quality of the part is obviously improved; and the necking mold is simple in structure, convenient to use, easy to operate and high in machiningefficiency.

The invention relates to a plastic guardrail plate mould which comprises n layers of plastic rib passages, n+1 layers of molten plastic passages and molten plastic filling passages, wherein the n layers of plastic rib passages for arranging plastic ribs are molded inside the mould, the n+1 layers of molten plastic passages are used for molding molten plastics of a plate body, and the molten plastic filling passages for filling the molten plastics are communicated with the inlets of the molten plastic passages; the plastic rib passages and the molten plastic passages are alternately arranged, and each layer of plastic rib passage is clamped between the molten plastic passages; and the plastic rib passages and the molten plastic passages are converged at the molding outlet of a plastic guardrail plate at the outlet end of the mould, wherein the n is a natural number larger than or equal to 1. The invention solves the technical problem that the physical characteristic of the plastic ribs is difficult to ensure in the process of manufacturing the plastic guardrail plate containing the plastic ribs.

The invention discloses a device for preventing redundant robot wiring from winding and extruding, which comprises a partition bracket, a plurality of distressing pieces and a dragging chain bracket, wherein the distressing pieces are connected with the partition bracket; the partition bracket is connected with the dragging chain bracket; and the dragging chain bracket and a cable dragging chain are separately installed. The distressing pieces form a multilayer wiring guide device so that the wiring of a plurality of cables prevents mutual winding and extrusion; and the invention has simple structure and high applicability and can be matched with the dragging chain to ensure the smooth motion of the cables.

The invention relates to a high temperature sensitization method for preparing a coal mine emulsion explosive. The method comprises the following steps: preparing an aqueous phase, an oil phase, emulsifying, sensitizing, loading and cooling. The following raw materials are used: ammonium nitrate, sodium nitrate, a suppressor agent, water, a composite oil phase, an emulsifier and a foaming agent. The foaming agent is prepared by mixing and stirring uniformly alpha-olefin sulfonate, sodium lauryl sulfate, sodium carboxymethylcellulose, polyvinyl alcohol, lignin, potassium acrylate, and water. The sensitization is as below: adding an accelerator and the foaming agent to a emulsion matrix with temperature of 85-110 DEG C, uniformly mixing and sensitizing for 2 to 18 minutes. The coal mine emulsion explosive uses air as sensitization bubbles, does not contain nitrogen oxides, reduces the risk of gas explosion, reduces the generation of toxic gases in the event of an explosion reaction, and increases the security of coal mine emulsion explosive by one level, under the same amount of flame inhibitor.

The invention relates to a hydraulic-driven type passenger car safety escape window. The hydraulic-driven type passenger car safety escape window is used for escape of passengers in emergency situations, and comprises a safety window shell, an action mechanism, a driving mechanism and an oil supply mechanism; the safety window shell is used for being separated in an emergency state so as to obtaina passenger safety escape channel; the action mechanism is used for separating the safety window shell, and providing the support for the safety window shell when the safety window shell is separated; the driving mechanism is used for providing continuous oil pressure, driving a hydraulic main cylinder to move in a reciprocating mode, and providing the safety window shell separation power; and the oil supply mechanism is used for storing the pipeline hydraulic oil and allowing the pipeline hydraulic oil to pass through so as to provide the initial power for separation of the safety window shell. Compared with an escape window in the prior art, the hydraulic-driven type passenger car safety escape window has the advantages that the degree of easiness in opening of a passenger car safety escape window in the emergency state is improved, meanwhile, the opening speed is increased, and then the escape possibility and the escape efficiency of passengers in a passenger car when the emergencysituation occurs are improved.

The invention provides a collodion cooling tool, and belongs to the technical field of household articles. The problem that the type and the number of a wringing device structure in an existing collodion cooling tool are insufficient is solved. The collodion cooling tool comprises a collodion installing base, a wringing base and a connector, and a collodion working head is installed on the collodion installing base; the collodion installing base is connected with the connector through a detachable connecting structure; a wringing roller is arranged at the lower portion of the connector, and isinstalled on the wringing base; two swinging rods are arranged between the connector and the wringing base, and are arranged up and down, one ends of the two swinging rods are rotationally connectedwith the wringing base, and the other ends of the two swinging rods are rotationally connected with the connector; when the collodion installing base is installed on the connector, and the connector swings, the wringing roller can extrude the collodion working head. When articles are cleaned through the collodion cooling tool, the collodion installing base is disassembled from the wringing base orthe connector, and separating of a cleaning operation part and a wringing operation part is achieved.

The invention relates to the technical field of printing production, and discloses a printing advertisement production device. The printing advertisement production device comprises an ink tank and aprinting roller located above the ink tank. An ink conveying mechanism is further included and comprises a rotationally-arranged main gear. A swinging rod is fixedly connected to the main gear and extends in the radial direction of the main gear. A rotationally-arranged L-shaped ejector rod is arranged on the outer side of the swinging rod, one end of the ejector rod is connected with a reciprocated swinging mechanism, and the other end of the ejector rod is hinged to the swinging rod. A swinging frame is hinged to the free end of the swinging rod and rotationally connected with an ink roller.The roller face of the ink roller abuts against the roller face of the printing roller. A sliding rail is arranged on the top of the ink tank, sponge is laid on the sliding rail, cotton threads penetrate the sponge, the end portions of the cotton threads are immersed in ink liquid in the ink tank, and the ink roller can slide to the sliding rail in the motion process. By means of the printing advertisement production device, the problem that in the prior art, when the printing roller conducts ink rolling, ink liquid in the ink tank is prone to being thrown out can be solved.

The invention discloses a large-size additive-subtractive-integrated FDM printing head. According to the printing head, by arranging a cutting device and a hot roller device on the rear portion of theprinting head, if the defect that the two sides of a printed workpiece exceed the size of a model exists, the excessive parts are cut by the cutting device following behind; hot rollers are arrangedbehind the cutting device, a step is bridged through the hot rollers, thus, the concave part of the step is remedied by the protrusion part of the step, and the surface quality is improved; the layer-to-layer binding force is determined by the binding area of the concave part, thus, the layer-to-layer binding area is increased through the method, the layer-to-layer binding force is improved, and the mechanical property of the whole printed workpiece is improved; in the whole cutting process, organic dust is not generated, the machining environment is good, compared with existing mechanical subtractive manufacturing, the surface gloss after heat working and the surface consistency after 3D printing forming are good, and no obvious machining trace exits. A subtractive device is small in size, other machining equipment does not need to be arranged additionally, the occupied area is small, and the cost is low.

The invention provides multi-disc concentration equipment for a papermaking system. The multi-disc concentration equipment comprises a base; a cylinder is fixedly mounted at the top of the base, and a mounting plate is fixedly mounted on the left side of the base; a feeding hole is fixedly formed in the left side of the base, and the feeding hole is positioned above the mounting plate; a flow guide device is mounted at the top of the mounting plate, and the right side of the flow guide device is located in a concentration device; a collecting device is installed on the left side of the top of the base, and a receiving device is installed on the right side of the top of the base; and a material baffling device is installed on the right side of the cylinder, and an elastic piece is arranged between the material baffling device and the base. When a motor works, a connecting shaft drives a first belt wheel to rotate, so that a gear drives a gear ring to rotate, a filtering cover slowly rotates, meanwhile, filtered water washes filtering holes in the bottom, self-cleaning of the filtering holes is achieved, and the filtering holes are of a conical structure, so that fine paper pulp blocked in the filtering holes can flow out conveniently, and the filtering holes are prevented from being blocked.

The invention provides a downward-turning type passenger car safety escape window. After the car window is unlocked, a car window body is ejected out through an ejection mechanism, and then the car window body is pushed downwards and opened in a pneumatic driving mode. Gas required for pneumatic driving is from an internal air source and an air storage tank of a passenger car, under the emergencycondition, an initial driving air pressure is provided by the internal air source of the passenger car, the insufficient part is supplied by the air storage tank, and enough driving force can be provided for opening the safety escape window through the pneumatic driving mode, so that all the safety escape windows can be opened under the conditions of the damaged window body, foreign object extrusion and the like. In addition, when the safety escape window is opened, a mode that the safety escape window is opened in the outward direction and then moves downwards is adopted, an opened safety escape window structure can be taken as an armrest, support is provided for passengers for escape, the armrest can assist the passengers in the passenger car with escaping, and secondary injury in the escape process is effectively avoided; and compared with an existing outward-turning mode, the window opening space is larger.

The invention provides an MPO multifilament drawing auxiliary device with ultrahigh squareness. The device is arranged on the end surface of a drawing furnace and comprises: an outer clamp; an inner clamp, wherein the size of the inner clamp is smaller than that of the outer clamp, and the outer clamp and the inner clamp are installed diagonally, so that the outer clamp at least partially clamps the inner clamp, and a square enclosure is formed between the outer clamp and the inner clamp; a plurality of sliding blocks arranged in the square enclosure, wherein every two of the sliding blocks are adjacent to form a square hole located in the center; and through L-shaped grooves arranged on each edge of the outer clamp and the inner clamp and pushing mechanisms arranged in the L-shaped grooves, wherein the pushing mechanism can be switched between a locking state and a releasing state in the L-shaped groove, in the releasing state, a pushing rod is acted by a clamping spring and located in one side of a sliding groove in the direction perpendicular to the side face of the sliding block, contacts with the corresponding sliding block and is pressed, and in the locking state, the pushingrod is operated to overcome the elastic force of the clamping spring, and the pushing rod and the sliding block are clamped on the other side of the L-shaped groove, so that the overall squareness isguaranteed.

The invention discloses an integrated circuit plastic packaging mold for preventing a horizontal overflowed material at a cored hole. The integrated circuit plastic packaging mold comprises an upper insert seat, a lower insert seat, an upper forming insert, a lower forming insert and a core, wherein the cored hole is formed in the center of a contact position of the upper forming insert and the lower forming insert; a step-shaped through hole is formed in the lower forming insert; the core is positioned in the step-shaped through hole; and the upper end surface of the core is elastically extruded on the surface, with the cored hole, of the upper forming insert. The integrated circuit plastic packaging mold is in a gapless state in a filling process, the thickness of the horizontal overflowed material of a packaged product is not increased, the horizontal overflowed material is convenient to remove, and production efficiency is greatly increased.

The invention discloses a petroleum pipeline supporting seat which comprises a bottom plate, a supporting arc plate is fixedly connected to the top of the bottom plate through a supporting rod, and correcting devices are symmetrically installed at the top of the supporting arc plate; an anti-sinking groove is formed in the bottom plate, the two ends of the anti-sinking groove penetrate through the bottom plate, and triggering grooves are evenly formed in the bottom of the bottom plate; and the triggering grooves communicate with the anti-sinking groove, and an anti-sinking plate is slidably connected to the bottom of the inner side of the anti-sinking groove. The invention relates to the technical field of petroleum equipment. The petroleum pipeline supporting seat device achieves the purpose of improving the stability in loose soil areas such as deserts, the petroleum pipeline supporting seat is prevented from sinking in the loose soil areas, the angle adjusting capacity is achieved, the angle can be corrected when the angle of the supporting seat deviates, and the situation that rolling over of a petroleum pipeline is accelerated due to the gravity of the petroleum pipeline is avoided; and the intelligent degree is high, and the supporting area of the supporting seat can be increased when the supporting seat sinks.

Aiming to solve the defects that in an existing intelligent pedestal pan cover plate, an electric wire is not protected, and the assembly efficiency is low, the invention provides an easy-to-assembleintelligent pedestal pan cover plate which is provided with a protection shell. According to the technical scheme, the intelligent pedestal pan cover plate is provided with a bottom plate and a coverplate assembly, a functional assembly is arranged in a cavity formed by the bottom plate and the cover plate assembly, and the protection shell with a coverage function assembly is fixed to the bottomplate. The wire which was not fully fixed previously is covered with the protection shell, and when the bottom plate provided with the functional assembly is turned over and put into a rear cover, itis ensured that the wire is not squeezed or pierced; during installation, workers do not need to consider whether the wire is squeezed or not, and the installation efficiency is improved.

The invention discloses an oil product squeezing device for the agricultural field, and relates to the agricultural field. The oil product squeezing device is simple in structure, convenient to use, more thorough in squeezing and greatly improves the utilization rate of raw materials. A guide inclined plate is adopted to achieve a shielding effect during discharging, and the raw materials are prevented from falling into gaps in the ends of squeezing roller columns; the lower end of the guide inclined plate is fixedly connected with a shielding vertical plate extending downwards; notches corresponding to the squeezing roller columns are formed in the shielding vertical plate; the shielding effect is improved by means of the shielding vertical plate; a hinge baffle is further adopted; one end of the hinge baffle is rotationally connected with an oil pressing box body; the other end of the hinge baffle is arranged at the upper end of the squeezing roller columns, and is connected with thesqueezing roller columns, so that the fallen raw materials can be guided between the two squeezing roller columns while the work of the squeezing roller columns is not influenced, and it is guaranteed that the fallen raw materials are squeezed, an the oil yield can be improved;the surfaces of the squeezing roller columns are cleaned by a cleaning shovel plate, so that a squeezing effect is secured.

The invention discloses secondary water supply equipment. The secondary water supply equipment comprises a bottom plate, water pumps are installed on the two sides of the upper end of the bottom platecorrespondingly, connecting pipes are installed on the water pumps, connecting mechanisms are arranged at the two ends of each connecting pipe correspondingly, sliding sleeves are arranged on the connecting mechanisms, the two sliding sleeves on the same side are jointly sleeved with a second three-way pipe in a sliding mode, and the two sliding sleeves on the other side are jointly sleeved witha first three-way pipe in a sliding mode. According to the secondary water supply equipment, the heights of the two three-way pipes can be well adjusted and controlled, the three-way pipes can conveniently correspond to the connecting pipes and are connected and fixed to the connecting pipes, the connecting firmness and sealing performance can be well guaranteed, and leakage in the water conveyingprocess can be favorably avoided; and meanwhile, two pump bodies can operate in turn, the service life of the equipment can be favorably prolonged, adjustment and control are convenient, it is guaranteed that water can be fully extruded, high-rise transportation is facilitated, and pump body maintenance is facilitated.

The invention relates to a pressing tool for pressing fittings (4) for producing pipe connection. The pressing tool has two opposing pressing jaws (6, 8) which each have a pressing portion (10, 12) and a lever portion (14, 16); a holding element (18) used for pivotably connecting the pressing jaws (6, 8), wherein the pressing portions (10, 12) form a receiving region (24) and the receiving region(24) is closed by the forcing apart of the lever portions (14, 16). The technical problem of pressing fittings for producing pipe connection in a simple and cost-effective manner is solved in that a drive spindle (26), a spindle nut (28) and at least two drive levers (30, 32) are provided, each drive lever (30, 32) is pivotably connected at one end to the lever portion (14, 16) of a pressing jaw (6, 8), and each drive lever (30, 32) is connected pivotably to the spindle nut (28) at another end. The invention also relates to a method for pressing fittings for producing the pipe connection.

The invention discloses a waste rubber sorting device in the field of waste sorting. A sorting mechanism comprises a sorting machine case, the top of the sorting machine case is provided with a secondfeeding port, and a first feeding port communicates with the second feeding port; a roller and an arc-shaped plate are arranged in the sorting machine case and located under the second feeding port,and a gap is reserved between the roller and the arc-shaped plate; a plurality of sawteeth are arranged on the surface of the roller, a second motor is arranged at one end of the roller, and the roller is rotatably connected with the second motor; the arc-shaped plate is fixedly connected with the sorting machine case, and a plurality of sawteeth are arranged on the face, close to the roller, of the arc-shaped plate; and a first discharging tank is arranged at the bottom of the sorting machine case, a plurality of sorting pipes are vertically arranged in the first discharging tank at intervals, an opening is formed in the bottom of the first discharging tank, and a second discharging tank is arranged under the first discharging tank and located under the opening. By adopting the waste rubber sorting device, the labor intensity of workers can be reduced, and the working efficiency can be greatly improved.

The invention discloses a calcium magnesium silicate pipeline heat preservation layer convenient to install, which comprises a pipeline body, the surface of the pipeline body is uniformly coated with an anti-corrosion layer, the outer side wall of the anti-corrosion layer is provided with a calcium magnesium silicate heat preservation plate, and the calcium magnesium silicate heat preservation plate is respectively composed of a composite heat preservation layer, a heat insulation layer and a waterproof layer from inside to outside. Supporting pipes are arranged on the upper outer side wall and the lower outer side wall of the calcium magnesium silicate heat preservation plate, and fixing mechanisms are arranged on the left sides and the right sides of the two supporting pipes correspondingly. A positioning block and a positioning groove are arranged to form clamping connection, accurate positioning is facilitated, then a connecting block is lifted upwards to enable an L-shaped rod to be clamped in a concave block, therefore, two supporting pipes are rapidly fixed, installation is convenient, it can be guaranteed that the two supporting pipes extrude a calcium magnesium silicate heat preservation plate through the tension of a spring, and the heat preservation plate can be conveniently and rapidly fixed. The calcium magnesium silicate heat preservation plate can be attached to the pipeline body, heat loss of the pipeline body is reduced, and therefore the heat preservation effect of the pipeline body is improved.

The invention discloses a rock-soil layer anti-backward anchor rod for mining, and relates to the technical field of mining engineering. The rock-soil layer anti-backward anchor rod comprises an anchor head, a rod body and an anchor rod joint, wherein drilling plates are uniformly arranged on the outer wall of a hollow tube; the inner wall of the hollow tube is movably connected with a rotary tooth part; the bottom of a rotary shaft is rotatably connected with the top of an arc-shaped tooth block; and a plurality of hollow sharp heads are uniformly arranged on the outer wall of the hollow tube. According to the rock-soil layer anti-backward anchor rod disclosed by the invention, the hollow sharp heads and the hollow tube are arranged, so that when cement is injected into the anchor rod, a pushing block extrudes a hose, and the hollow tube is ejected out by pressure, on the pushing block, of cement; the hollow sharp heads are arranged on the outer wall of the hollow tube, are tapered, and are inserted into a rock-soil layer, and cement flows into the hollow sharp heads along the hollow tube, so that the anchor rod and the rock-soil layer are bonded and fixed better; when cement flows into a front drill bit, a pressure plate is extruded, and a hook cover moves upwards along a slide path to eject out a drill shell; and a hook tube is in the shape of an inverted hook, so that the anchor rod is prevented from moving backwards to cause safety problems of mining workers or rock-soil collapse.

The invention discloses a precise positioning clamp holder for batch part machining in the technical field of clamp holders. The precise positioning clamp holder comprises a tool body, the tool body is in a groove shape, positioning columns are evenly arranged on the front side and the rear side of the bottom end face of an inner cavity of the tool body, a machined product is arranged between every two adjacent positioning columns, limiting devices are correspondingly arranged between the machined products, and the front end faces and the rear end faces of the limiting devices are attached to the opposite faces of the machined products. The device structure is simple, operation is convenient, the precision of the machined products is effectively improved, the machining error is reduced, and the machining efficiency is improved.

The invention relates to a back percussion mattress for supination and turnover. First grooves and second grooves, the internal spaces of which are matched with coil frameworks, are densely arranged in the width range, located at the chest position of a supine human body, in the mattress; electric hammers are selectively placed in the first grooves and the second grooves; and the coil frameworks are arranged in the first grooves, where the electric hammers are arranged. The back percussion mattress for supination and turnover in the invention achieves that the upper surface of the mattress isflat, and the back percussion function can be realized when a bedridden disabled person lies on the back and turns over without foreign body sensation under the body.

The invention discloses a device for expanding a slot wedge in a motor stator slot. The device comprises a connecting plate, the lower end of the connecting plate is fixedly connected with a mountingplate, the lower end of the mounting plate is fixedly connected with an upper connecting cover, a lower connecting cover is arranged below the upper connecting cover, and a supporting mechanism is jointly inserted and fixed between the upper connecting cover and the lower connecting cover. An upper anti-disengaging mechanism and a lower anti-disengaging mechanism are movably embedded in the upperportion and the lower portion of the inner cavity of the supporting mechanism respectively, an ejection mechanism is movably connected between the upper anti-disengaging mechanism and the lower anti-disengaging mechanism, and an expansion shaft is movably connected to the inner side face of the ejection mechanism. According to the device for expanding the slot wedge in the motor stator slot, the problem that the slot wedges in the stator slots protrude is further avoided through a mechanical expansion plate method, the number of the mechanical expansion plates is consistent with the number ofthe stator slots, and the insulating slot wedges in all the stator slots can be expanded at the same time; and an air cylinder is matched with a linear module to achieve cross-assembly-line carrying between the stators.

The invention provides a floating algae fishing device for ecological restoration of a river channel. The device comprises a ship body; a sliding frame is connected with the front side of the left portion of a transverse supporting rod; a check block is arranged on the right side of the middle of the sliding frame; a sliding plate is connected with a rotating disc and located in an arc-shaped sliding groove; a telescopic rod is connected with the clockwise side of a guide rod; a fishing rod is connected with the outer side of the rotating disc in a surrounding mode; an air bag corresponding to an air pipe is arranged on the inner side of the end of the fishing rod; and the anticlockwise side of the fishing rod is connected with an elastic belt corresponding to the sliding plate. The fishing rod gathers floating algae in water through the guide rod, when the fishing rod gradually moves underwater, the air bag in the fishing rod is extruded by water pressure, and a ball part on the telescopic rod abuts against the cambered surface of the end of the fishing rod, so that the slender floating algae are fixed and further driven to move rightwards. By means of the structure, the problem that the fishing efficiency of the floating algae is low due to the fact that the floating algae easily slip from a hook part of a fishing device is solved.

The invention discloses a rock-soil layer anti-regression bolt for mining, which relates to the technical field of mining engineering and includes an anchor head, a rod body and a bolt joint. The inner wall of the hollow tube is movably connected with rotating gears, the bottom of the rotating shaft is rotatably connected with the top of the arc tooth block, and the outer wall of the hollow tube is uniformly provided with several hollow pointed ends. The present invention uses a hollow tip and a hollow tube, wherein when cement is injected into the anchor rod, the push block squeezes the hose, and the hollow tube is ejected by the pressure of the cement on the push block, and the outer wall of the hollow tube is provided with a hollow tip. The tip is conical, and the hollow tip is inserted into the rock and soil layer. The cement will flow into the hollow tip along the hollow tube to better bond and fix the anchor rod and the rock and soil layer. When the cement flows into the inside of the front drill bit, it will be squeezed The pressure plate and the hook cover move up along the slideway to push out the drill shell, and the hook tube is barb-shaped to prevent the safety problems of the mining workers or the rock and soil collapse caused by the retreat of the bolt.

The invention discloses a valve body of a polyethylene ball valve, and relates to the technical field of polyethylene ball valves. The valve body of the polyethylene ball valve at least comprises a valve seat, a valve element arranged in the valve seat and a valve rod used for driving the valve element, a medium channel is arranged in the valve seat, the valve element is arranged in the medium channel of the valve seat, and a leak checking sealing cover is further included; a sliding sleeve is embedded into one end of the interior of the medium channel, the sliding sleeve and the medium channel are arranged coaxially, the outer wall of the sliding sleeve is fixed to the inner wall of the medium channel in a sealing mode, an internal thread segment and a smooth segment are arranged in the sliding sleeve, and the internal thread segment is located on an opening side of the end of the medium channel; the leak checking sealing cover is sequentially divided into a sealing segment, an external thread segment and a limiting segment from front to back, and the sealing segment can be in sliding sealing fit with the smooth segment in the sliding sleeve; the external thread segment can be screwed and fixed with the internal thread segment in the sliding sleeve; and a gas conveying channel is arranged on the leak checking sealing cover in a penetrating through the front end surface and therear end surface mode. According to the valve body of the polyethylene ball valve, when the valve element shifts, leakage possibility can be further reduced, and gas tightness teat can be carried outconveniently.

The invention discloses a plastic cabinet with a self-locking function, and relates to the technical field of plastic cabinets. The plastic cabinet comprises a cabinet body, the cabinet body is hingedto a cabinet door through a hinge rod, and the cabinet body comprises a locking face making contact with the side face of the cabinet door and a storage cavity; a U-shaped lock nose is fixed on the side surface of the cabinet door; a plurality of first magnets are uniformly distributed on the locking surface; a self-locking mechanism is mounted in the first rectangular opening; a plurality of second magnets which magnetically attract the first magnets are uniformly distributed on the inner side surface of the cabinet door; the self-locking mechanism comprises a self-locking rod, a nut and a half gear. Magnetic attraction or electric driving is used as power to control the cabinet door to extrude the half gear, the self-locking rod is driven to descend on the basis of the nut, and lockingfit of the U-shaped lock nose and the locking rod is achieved; and finally, a motor rotates reversely, so that locking fit is relieved, and the cabinet door is opened. The process is simple in structure and convenient to control, the cabinet door can be effectively opened and locked, and the risk of economic and property loss of people is reduced.