294results about How to "Avoid connection" patented technology

The invention belongs to the technical field of sewage pipeline flow detection, and particularly relates to a sewage pipeline flow calculation method based on electromagnetic induction, which comprises the following steps: step 1, a detection mechanism is arranged between two butt-joint flowing sewage pipelines, and the detection mechanism is composed of a measuring pipe, an electrode and an excitation coil, the magnet exciting coil wraps the outer arc surface of the measuring tube. The sewage pipeline flow calculation method based on electromagnetic induction is high in measurement precision and suitable for various conductive media including sewage, corrosive liquid and a mixture containing solid particles; the measuring range is wide, and the device is suitable for measuring fluids with different pipe diameters and flow ranges. The electromagnetic flowmeter can be quickly mounted on the sewage pipe through the quick clamping mechanism, so that the mounting time is shortened, the labor intensity is reduced, and maintenance and calibration are facilitated; measurement errors caused by fluid interference are avoided by reducing accumulation of sediments, and the accuracy of circulation measurement is further enhanced by circular motion measurement of the electrodes.

The utility model provides a rock drill impact hydraulic control valve group and a rock drill, the valve group comprises a hydraulic control reversing valve, a first throttling hole, an electric proportional overflow valve, an overflow valve, a second throttling hole, a valve body and an electromagnetic reversing valve, the valve body is provided with a pressure oil port P, an oil return port T, an oil drainage port L, an LS oil port and a working oil port A; the pressure oil port P is communicated with an oil inlet of the overflow valve and an oil inlet of the second throttling hole through a hole channel in the valve body. An oil outlet of the second throttling hole is communicated with an oil inlet of the electromagnetic reversing valve; a working oil port of the electromagnetic reversing valve is communicated with a control oil port of the hydraulic control reversing valve; the oil return port T is communicated with an oil outlet of the overflow valve; and the oil drainage port L is communicated with an oil drainage port of the electromagnetic reversing valve, and is communicated with an oil drainage port of the hydraulic control reversing valve, an oil outlet of the electric proportional overflow valve and a control oil port at the same time. Damage of pressure building to a system and elements is eliminated, and residual impact pressure existing after oil cut-off is eliminated.

The invention provides a self-locking hydraulic anchor which comprises a hydraulic anchor body, a sliding mandrel capable of making contact with the hydraulic anchor body, an elastic piece connected with the sliding mandrel, a one-way valve and a sealing mandrel. The one-way valve comprises a valve seat arranged in the hydraulic anchor body and a valve element capable of being separated from or making contact with the valve seat. A part of the outer wall of the sealing mandrel and a part of the inner wall of the hydraulic anchor body form a closed cavity, the first end of the one-way valve is communicated with the closed cavity, the second end of the one-way valve is communicated with an inner tubular column of the sliding mandrel, and the sliding mandrel can abut against the hydraulic anchor body under the action of the elastic piece and push the valve element to leave the valve seat at the same time. And the valve element can move away from the hydraulic anchor body under the action of external force, so that the valve element is in contact with the hydraulic anchor body. According to the self-locking type hydraulic anchor, in the reservoir transformation period, the pressure in the self-locking type hydraulic anchor is always larger than the pressure borne by the outside, so that the anchor fluke is in a locked state, a packer is prevented from being unblocked, and an oil pipe is prevented from being communicated with a sleeve.

The utility model relates to the field of vehicles, and provides a vehicle roof and a vehicle. The vehicle ceiling comprises a ceiling body, a decorative plate and a connecting plate. The ceiling body is provided with an open hole for a mounting rod of the loading net to penetrate through, the decorative plate is connected with the side, facing the interior of a vehicle, of the ceiling body in an attached mode, the open hole is located in the projection of the decorative plate on the ceiling body, the connecting plate and the decorative plate are distributed in a stacked mode and connected with each other, and the ceiling body is clamped between the decorative plate and the connecting plate. The decorative plate and the connecting plate are connected with the ceiling body in a clamping manner, so that the decorative plate is prevented from being connected with a metal connecting bracket, a clamping pin clamped with the connecting bracket does not need to be arranged on the decorative plate, and the decorative plate and the connecting plate can only deform along with the ceiling body and cannot form splashes when a side air curtain point explosion test is performed on a vehicle; and failure of the side air curtain ignition test is avoided.

The utility model relates to a chain plate type feeder which comprises a chain scraper, a conveying belt, a driving chain and a belt connection driving chain piece, the belt connection driving chain piece enables the driving chain to be connected to one side or two sides of the conveying belt to form a rubber chain conveying belt, the chain scraper is arranged on the upper portion of the conveying belt or fixedly connected with the conveying belt, and when the chain scraper is fixedly connected with the conveying belt, the conveying belt is fixedly connected with the conveying belt. The chain scraping plates are higher than the upper surface of the conveying belt, the chain scraping plates are connected to the rubber chain conveying belt through the driving chain or the conveying belt or the belt connecting driving chain piece to form a chain scraping plate conveying belt, and the belt connecting driving chain piece comprises a conveying belt gear shaft or a nail button with a flange or a screw with a flange or a threading with a flange or a zipper with a flange. When the conveying belt gear shaft is used, the conveying belt gear shaft is arranged on one side or two sides of the conveying belt, the conveying belt gear shaft is connected with the driving chain in a penetrating mode, the conveying belt is connected to the driving chain in a penetrating mode or the conveying belt is buckled to the driving chain, the chain plate type feeding machine further comprises a driving gear, and the driving chain is meshed with the driving gear to drive the chain scraper conveying belt to operate.

A fabric-based implant or prosthetic tubular or non-tubular product is provided that requires two materials: a fabric and an impermeable non-organic hydrophobic or super-hydrophobic material that, when built into the graft product of the invention, create three different regions. The resulting self-sealing implant or prosthetic product has super moisture resistance and is thus easier to transplant from the body. Tolerance of transplantation to electrosurgical energy, such as electrocauterization, is further improved through a surface. The implant or prosthesis product also prevents leakage and transmural communication or migration through the implant or wall while still allowing tissue to grow inwardly along at least a portion of one surface of the implant or prosthesis for secure anchoring.

The invention relates to the technical field of industrial kilns, in particular to an improved structure for solving the over-temperature problem of an upper temperature area of a heating section of an industrial kiln, which comprises a furnace body and a plurality of temperature areas arranged along the length direction of the furnace body; the exhaust system is connected to the top of the furnace body and comprises an exhaust fan, an exhaust pipe, a first chimney and a second chimney, the exhaust pipe is arranged in the length direction of the furnace body and connected with the exhaust fan, a plurality of temperature areas on the front section of the furnace body are communicated with the exhaust pipe through the first chimney, a plurality of temperature areas on the rear section of the furnace body are communicated with the exhaust pipe through the second chimney, and the first chimney is communicated with the second chimney. The second chimney is closed to block gas flow and heat transfer of adjacent temperature intervals along the length direction of the furnace body; the conveying belt is arranged in the length direction of the furnace body and used for conveying products; the air curtain pipes are arranged between the adjacent temperature areas, air exhausted from the air curtain pipes forms an air curtain, and air flow in front of the adjacent temperature areas is separated.

The present invention relates to a movable verticality detection device for engineering quality inspection applied to the technical field of measuring devices. The device adopts a spherical shell sealing structure, the interior of which is filled with liquid and evacuated to improve vibration isolation performance. The device is provided with a horizontal shell and a vertical shell supported by buoyancy, and resists external disturbances through a high-speed rotating turntable to provide a stable reference direction. Laser reflection lenses and prisms are used to project a laser beam onto the surface of an object to be measured, and the verticality is judged by comparing the light band deviation. The device adopts a conductive coil to transmit power and signals, and a laser angle detection component corrects errors in real time. The permanent magnet adsorption method is easy to install, and the controller realizes automatic operation and data processing, thereby improving detection efficiency and accuracy. The present invention integrates laser and electronic technologies, realizes automatic and intelligent detection, improves detection accuracy and efficiency, is suitable for engineering construction, precision instrument calibration and other fields, and has broad application prospects.

The invention relates to the technical field of cold drink heat preservation, in particular to an ice cream heat preservation device which comprises a heat preservation box body, a heat insulation barrel is fixedly connected to the interior of the heat preservation box body, a plurality of phase change cold storage plates are arranged in the heat insulation barrel in the circumferential direction, and containing barrels are arranged between the multiple phase change cold storage plates. A sealing cover is hinged to the top of the heat preservation box body, a circular through hole is formed in one end of the top of the heat preservation box body, and a water storage cylinder is fixedly connected into the circular through hole; through cooperative work of the closed water inlet mechanism and the uncovered water drainage mechanism, when the ice cream spoon body is used every time, cleaning water in the water storage barrel can be replaced, the cleaning effect and attractiveness of the ice cream spoon body are guaranteed, and the influence of repeated use of the ice cream spoon body on the buying desire of a purchaser is reduced.

The invention relates to the technical field of noise reduction, in particular to a sound insulation structure and sound insulation glass, comprising: a main body having a first surface which is recessed inwards to form a cavity; and the rebounding piece is arranged in the cavity and can reflect the sound waves entering the cavity from the first surface. The device has the beneficial effects that when low-frequency sound waves are transmitted and incident to the main body, the sound wave frequency is matched with the cavity frequency to cause air resonance in the cavity, air rushes into the cavity from the outside of the cavity, viscous loss can be generated between holes and the air, and sound wave energy is converted into heat energy to be weakened; the rebound piece in the cavity starts to vibrate due to the resonance effect, the acting force of the sound waves on the main body and the counter-acting force generated by vibration of the rebound piece offset each other, the vibration of the main body is weakened, and therefore the noise reduction effect on low and medium frequency noise is achieved.

The utility model relates to liquid containing utensil technical field, concretely relates to a bubble kettle, including the kettle body, the kettle body upper cover is equipped with the kettle cover, is provided with the gas generating device on the kettle cover, and the gas generating device is connected with the kettle body, be provided with the upper cover on the kettle cover, and the upper cover forms the installation space with the kettle cover, be provided with the drinking water pipe subassembly in the kettle body, and the first end of drinking water pipe subassembly is located in the kettle body, and the second end of drinking water pipe subassembly is connected with the pipe orifice cover after passing through the kettle cover and the upper cover in proper order, be provided with the gas generating device that can communicate with the kettle body on the kettle cover, open the gas generating device can produce gas and melt into the liquid that the kettle body is filled with, set up drinking water pipe subassembly in the kettle body, and drinking water pipe subassembly exposes outside after passing through the kettle cover and the upper cover, and the one end of drinking water pipe subassembly exposed outside is provided with the pipe orifice cover, prevents the kettle body from communicating with the outside through drinking water pipe subassembly when not using.

The invention relates to a semiconductor structure and a forming method thereof. The semiconductor structure comprises a substrate; the active array is positioned on the substrate and comprises a plurality of active columns which are arranged at intervals along a first direction and a second direction, and the first direction is intersected with the second direction; the bit line structure is positioned on the substrate, the bit line structure comprises a plurality of bit lines which are arranged at intervals along a second direction, and the bit lines extend along the first direction and are electrically connected with the plurality of active columns which are arranged at intervals along the first direction; the isolation structure is located below the bit line, the isolation structure comprises an isolation layer and an air gap located in the isolation layer, and the resistivity of the isolation layer is larger than that of the substrate. According to the invention, the electrical isolation effect between the adjacent bit lines is enhanced, so that the problem of electric leakage between the adjacent bit lines is reduced.

The present invention discloses an anti-misplugging structure for a surge protector, which relates to the technical field of surge protectors, and comprises a base and a plurality of main bodies detachably connected to the base, wherein the base is provided with wiring holes and a blocking mechanism, wherein the wiring holes are provided with a plurality of holes for connecting a neutral line, a live line or a ground line; the blocking mechanism has a first state of blocking the plurality of wiring holes and a second state of opening the plurality of wiring holes, and when the plurality of main bodies are installed on the base, the blocking mechanism switches to the second state. The present invention provides an anti-misplugging structure for a surge protector, which can block the plurality of wiring holes through the first state of the blocking mechanism, and when in use, the plurality of main bodies are installed on the base to form a complete surge protector, and at this time the blocking mechanism switches to the second state to open the plurality of wiring holes, so that the neutral line, the live line or the ground line can be normally inserted into the wiring hole for connection.

The mobile vehicle-mounted energy storage emergency power supply system comprises an intelligent transport vehicle, an energy storage battery module, an inversion power supply module and an emergency power supply detection control module, the energy storage battery module is arranged on the intelligent transport vehicle, and a damping buffer platform for installing the energy storage battery module is arranged on the intelligent transport vehicle; an automatic lifting support and fixed wheel sets are arranged at the bottom of the intelligent transport vehicle, and a detachable trailer wheel set is arranged at the position, between the fixed wheel sets, of the bottom of the intelligent transport vehicle. The energy storage battery module is in driving connection with the automatic lifting support through the control device and used for lifting the intelligent transport vehicle when the trailer wheel sets are replaced, the two fixed wheel sets are used for passing through channels in an area, and after the trailer wheel sets are installed at the bottom of the intelligent transport vehicle, the intelligent transport vehicle is rapidly transferred and deployed between sections or cities. A plurality of energy storage and power supply devices can be quickly deployed to an emergency power supply occasion, energy storage and power supply device resources can be fully utilized, an existing fuel power generation vehicle power supply guaranteeing mode can be completely replaced, and the overall deployment cost is saved.

The utility model discloses a reagent bottle safety connecting device, including bottle stopper, anti-sticking connecting piece and connecting rope, the bottle stopper is used for inserting in the inlet end of reagent bottle, the anti-sticking connecting piece wraps the outer surface of the bottle stopper and is detachably connected with the bottle stopper, the connecting rope passes through the top of the bottle stopper, the anti-sticking connecting piece is detachably connected with the bottle stopper, and the connecting rope is detachably connected with the anti-sticking connecting piece. The anti-sticking connecting piece is movably arranged on the connecting rope, and the connecting rope can be connected with bottle plugs of other reagent bottles. The utility model further discloses a reagent bottle assembly which comprises the reagent bottle and the reagent bottle safety connecting device. According to the utility model, the bottle plug has an anti-loss function, and the bottle plug can be effectively prevented from being adhered to the inlet end of the reagent bottle.

The utility model discloses a bridge engineering steel box girder assembly quick support, which relates to the technical field of bridge engineering and comprises a bottom plate, a support column is fixedly connected to the middle of the top of the bottom plate, a rotating shaft is fixedly connected to the top of the support column, and a first connecting mechanism is arranged on the outer side of the rotating shaft. The top of the supporting column is connected with a supporting plate through a first connecting mechanism, and second connecting mechanisms are evenly arranged on the outer side wall of the supporting column. According to the bridge engineering steel box girder splicing fast support, a pressing rod is pressed, so that a connecting plate drives clamping blocks to move, the clamping blocks get close to each other, the clamping blocks are arranged in a moving groove, the pressing rod is loosened, the connecting plate drives the clamping blocks to reset, the clamping blocks are clamped into clamping grooves, and therefore a supporting plate and a supporting column are conveniently connected; and a large number of bolts are prevented from being connected through tools, time is saved, the labor amount is reduced, assembling is faster, and the convenience of the device is improved.

The invention relates to the technical field of cable crimping devices, in particular to a crimping device for an automobile wire harness cable, and the crimping device comprises a supporting column, the upper end of the supporting column is fixedly provided with an operation box, and the operation box is provided with a feeding port; and the clamping assembly comprises two clamping heads. The outer surface of a cable is fixed through the two chucks driven to be close to each other, when the chucks move to fix the cable, air in an air injection box can be pushed into an air bag through an air conveying pipe through the arrangement of a connecting rod and a linkage rod, and the air bag can only expand towards the axis of a clamping ring through the arrangement of the clamping ring, so that the cable can be fixed through the clamping ring. The expanded air bag can fix and gather the electric cores of the cable together, at the moment, the electric cores of the cable and the outer surface of the cable are fixed together, and the situation that the outer surfaces of the cable and the electric cores are damaged due to the fact that the electric cores move on the outer surfaces of the cable and the electric cores when the cable is fixed can be effectively avoided through the sponge and the air bag.

The application discloses an intelligent power supply control system, and relates to the field of intelligent power supply management equipment.The system comprises an LCD display module and a power supply management MCU chip, wherein the power supply management MCU chip is internally integrated with a nonvolatile memory, a CPU module, a PMU module, an LCD controller and a bandwidth arbitrator; the bandwidth arbitrator is connected with the nonvolatile memory, the CPU module and the LCD controller; the CPU module is connected with the PMU module and the LCD controller; the output end of the LCD controller is in communication connection with the LCD display module; the nonvolatile memory internally stores color screen display memory data and instruction codes to be executed by the CPU module; and the bandwidth arbitrator configures the priority and bandwidth of the nonvolatile memory in responding to an access request when an access conflict occurs.The application simplifies the hardware circuit.

The invention provides a method for removing a linker self-linking product in a small RNA library preparation process. The method comprises the following steps: step a) adding excessive reverse transcription primers to close a 3'linker; a step b) of Damp; l, enzyme treatment; and a step c) of Cas-sgRNA complex treatment. The invention also provides a method for removing a linker self-linking product and polluted nucleic acid in the preparation process of the small RNA library, a preparation method of the small RNA library, a multi-omics sequencing library containing the small RNA and the like.

This utility model provides a wiring system for the low-voltage side of a single-phase autotransformer and a prefabricated box-type switchgear in a confined space, comprising: a low-voltage bushing of the single-phase autotransformer, an aluminum tube busbar branch bus, an aluminum tube busbar main bus, a copper tube bus, and a prefabricated box-type switchgear. The low-voltage bushing of the single-phase autotransformer is connected to the aluminum tube busbar branch bus via a flexible copper busbar; the aluminum tube busbar branch bus is connected to the phase-separated aluminum tube busbar main bus via a flexible copper busbar; the aluminum tube busbar main bus is connected to the copper tube bus; and the end of the copper tube bus is connected to the prefabricated box-type switchgear. The wiring system provided by this utility model occupies little space and has a simple and compact layout; the delta connection on the low-voltage side of the transformer uses an aluminum tube bus to reduce costs, and the connection to the box-type switchgear bus avoids terrain limitations by using a flexible copper tube bus; the prefabricated box-type switchgear occupies little space, is easy to assemble and saves construction time, and the internal switch cabinet spacing is easy to expand.

The invention discloses a testing device for a point type smoke fire detector, and belongs to the technical field of testing of smoke fire detectors, the testing device comprises a smoke box, a placement piece and a switching device, the smoke box is of a closed-loop cavity structure shaped like a Chinese character'hui ', and one side of the smoke box is connected with a smoke inlet pipe; a smoke outlet pipe is arranged on the lower side of the smoke box; the placing piece comprises a supporting plate, a plurality of placing grooves are formed in the supporting plate, and the supporting plate is in sliding connection with the smoke box; the two supporting plates are arranged, detection is carried out in the smoke box through one supporting plate, the smoke sensing fire detector body is placed on the outer side of the other supporting plate, the utilization efficiency of time is improved, after detection is completed, switching is carried out through the switching device, the detection device does not need to be shut down, and the detection efficiency is improved. Therefore, the smoke-sensing fire detector body on the other supporting plate can be rapidly detected, and the detection efficiency is improved.

The utility model relates to the field of needleless injector medicine taking devices, and particularly provides a novel single-injector flexible medicine taking device. The device comprises a medicine taking assembly, an inner sleeve assembly, a medicine taking device, an ampoule bottle and an insulin bottle, the medicine taking assembly comprises an outer sleeve, a limiting mechanism is arranged on one side of the outer sleeve, the limiting mechanism comprises a fixing ring, the outer side of the fixing ring is in threaded connection with a rotating ring, a spring piece is arranged on the inner side of the fixing ring, and the rotating ring is in threaded connection with the rotating ring. Through the limiting mechanism, along with the transverse position movement of the rotating ring, the inner side of the limiting mechanism and the spring piece form inclined plane abutting, so that the spring piece is elastically deformed, the friction plate on the inner side of the spring piece is tightly abutted against the inner sleeve shell, and the contact friction force between the outer sleeve and the inner sleeve shell is increased; further threaded rotation between the outer sleeve and the inner sleeve shell can be effectively prevented, and therefore the situation that medicine in the insulin medicine bottle overflows after the ampoule bottle is removed is avoided.

The application provides a point cloud encoding method and device based on a prediction tree, equipment and a storage medium. The method comprises the following steps: obtaining a target point cloud, the target point cloud comprising N points; constructing a main prediction tree based on part of the main nodes in the N points; inserting the adjacent points of the main nodes in the remaining points into the main nodes to obtain a target prediction tree of the target point cloud for each main node in the main prediction tree; and encoding the target point cloud based on the target prediction tree. That is, the application takes the main nodes as the center, optimizes the connection relationship between the local points, and prevents the connection of points far away from each other. The target prediction tree obtained in this way realizes the optimal ordering of the local points, improves the construction accuracy of the target prediction tree. When prediction is performed based on the accurately constructed target prediction tree, the prediction accuracy of the target point cloud can be improved, and the encoding efficiency of the target point cloud is further improved.

System for moving a retractable roof consisting of aligned movable trusses that move on two parallel guide rails by means of runners arranged on the side posts of the said trusses, and where the trusses are joined together by a tarpaulin, where the retraction system has the particularity that each runner consists of two side walls facing each other, and between these walls there are rows of grooved wheels fixed at two different heights; each guide rail comprises an upper curved surface on its upper side, and a lower curved surface on its lower side; where the runner runs along and is kept in contact with the guide rail by the wheels of the upper row being in contact with the upper curved surface of the guide rail, and by the wheels of the lower row being in contact with the lower curved surface of the guide rail.

The present application provides an electrical connector and a method for making the same, an electrical connection assembly, and an electronic device, and relates to the technical field of electronic products. The electrical connector uses a polymer elastomer as the main supporting structure, and disperses conductive fillers in a local area of ​​the polymer elastomer. The conductive fillers are directionally arranged along the height direction of the polymer elastomer and completely occupy the height space of the polymer elastomer. In this way, a conductive channel extending to the surfaces on both sides along the height direction can be formed in the polymer elastomer. Thus, the polymer elastomer electrically connects the structural parts located on both sides thereof through the conductive channel. In this way, the polymer elastomer isolates the salt solution outside the conductive elastic connection area of ​​the electrical connection assembly, prevents the formation of electronic and ion pathways in the electrical connection assembly, improves or even avoids galvanic corrosion, improves the connection reliability of the electrical connection assembly, ensures the structural strength and dimensional stability of the structural parts, and improves the reliability of the electronic device.

The invention relates to a hybrid voltage limiter. According to the invention, the hybrid voltage limiter (1) comprises a first electrode (14), a second electrode (15), flip-flop electronics (10), a thyristor component and a varistor component, the varistor component comprising a varistor (9) and being connected in parallel with the thyristor component, where the thyristor component is electrically connected to the first electrode (14), the thyristor component forming two thyristors (5) connected antiparallel, the gate of an anti-parallel connected thyristor (5) is connected to the flip-flop electronics (10) in such a way as to be able to receive a trigger signal of the flip-flop electronics (10), where the flip-flop electronics (10) are electrically connected to a first electrode (14) and a second electrode (15), where the thyristor component is electrically connected to the second electrode (15) via a first resistivity. The thyristor component is electrically connected to the second electrode (15) by a bypass (6) having a second electrical resistivity, the first electrical resistivity having a higher resistance value than the second electrical resistivity, and the bypass (6) is connected to the second electrode (15) in a spark gap-avoiding manner, and the varistor component is electrically connected to the first electrode (14) and the second electrode (15).

The utility model discloses an aluminum cup with good anti-corrosion effect in the field of textile aluminum cups, which comprises a rotating rod, an aluminum cup body, a protective mechanism and a connecting mechanism, the aluminum cup body is fixedly connected to the top of the outer side of the rotating rod through the connecting mechanism, the protective mechanism is fixedly connected to the outer side of the aluminum cup body, and the connecting mechanism is fixedly connected to the outer side of the aluminum cup body. The inner side of the aluminum cup body is sleeved with a lining, and the top of the lining is fixedly connected with a mounting ring. According to the aluminum cup with the good anti-corrosion effect, the lining is mounted in the aluminum cup body, the inserting rod is pulled, the connecting spring is stretched, the outer side of the aluminum cup body is sleeved with the outer lining, the connecting spring is loosened, and the outer lining is rotated; and through resetting of the connecting spring, the inserting rod is embedded in the inserting hole, and the outer lining is fixed, so that the outer side of the aluminum cup is protected, corrosion to the aluminum cup is reduced, the anti-rust capacity of the aluminum cup is improved, and the service life of the aluminum cup is prolonged.

The utility model discloses a novel environment-friendly edible oil paper packaging roof box which comprises a box body, the box body is surrounded by a plate body to form a cavity, the plate body is provided with an inner surface and an outer surface, the plate body is bent into a first plate body and a second plate body, one end of the second plate body is connected with one end of the first plate body, and the other end of the second plate body is connected with the other end of the second plate body. The outer surface of the second plate body abuts against and makes contact with the outer surface of one end of the first plate body, the inner surface of the other end of the first plate body is connected with the inner surface of the second plate body, the upper side edge of the box body is sealed, and the lower side edge of the box body is sealed. The first plate body and the second plate body are formed after the plate body is bent, the inner surface of the other end of the first plate body is connected with the inner surface of the second plate body, when edible oil is contained in the roof box, the fracture surface of the plate body is prevented from being soaked in the edible oil, the problem that the fracture surface of paper at the sealed edge in the box is damaged is avoided, and the edible oil is prevented from being oxidized and deteriorated; through the technical improvement that the overlap edge is reversely folded and then sealed when the roof box is formed, the contact between the fracture surface and the edible oil can be avoided, so that the shelf life and flavor of the edible oil are ensured.