392 results about "Open air" patented technology

A multi-layer shock absorbing cushion sole for footwear includes four layers of material, assembled in such a way that air pockets are created within the sole to provide a shock-absorbing, cushioning effect for a wearer's feet. The top layer of the sole is a hard rubber layer, preferably made from a thermoplastic rubber. The second layer is preferably positioned directly beneath the top layer, and includes shaped surfaces forming ridges and grooves on a top and bottom portion thereof to create open air pockets within the sole. The third layer, positioned below the cushion layer, is also preferably formed from a thermoplastic rubber. The bottom layer is preferably formed from natural rubber, and preferably includes a tread design on the bottom surface thereof. A multi-layer shock absorbing cushion insert for pre-existing footwear is also provided in another embodiment.

A multi-layer shock absorbing cushion sole for footwear includes four layers of material, assembled in such a way that air pockets are created within the sole to provide a shock-absorbing, cushioning effect for a wearer's feet. The top layer of the sole is a hard rubber layer, preferably made from a thermoplastic rubber. The second layer is preferably positioned directly beneath the top layer, and includes shaped surfaces forming ridges and grooves on a top and bottom portion thereof to create open air pockets within the sole. The third layer, positioned below the cushion layer, is also preferably formed from a thermoplastic rubber. The bottom layer is preferably formed from natural rubber, and preferably includes a tread design on the bottom surface thereof. A multi-layer shock absorbing cushion insert for pre-existing footwear is also provided in another embodiment.

The utility model discloses a range hood, which comprises a range hood main body, an air suction panel, an air suction opening, a fan, an air inlet and a fan, the air suction panel is provided with an air suction opening, the air suction opening comprises a normally closed air suction opening and a normally open air suction opening, and the normally open air suction opening is positioned above the normally closed air suction opening; the baffle is connected to the front side of the air suction panel in a sliding mode and shields the normally-closed air suction opening. The movable panel is connected to the front side of the air suction panel in a sliding mode, shields the baffle and is used for opening or closing the air suction opening, the part, exposed out of the rear side of the movable panel, of the air suction opening forms an effective air suction opening, and the air suction area of the effective air suction opening is not smaller than that of the normally-open air suction opening; and the driving end of the driving module is connected with the baffle and the movable panel. According to the range hood, the air suction area of the air suction opening can be adjusted more flexibly according to the amount of smoke in a kitchen, so that an ideal smoke exhaust effect is achieved while energy is saved, and the health level of cooking personnel is improved.

The utility model discloses an oil-gas separator airtight detection device in the field of automobile part manufacturing, which comprises a base, a vertical quick clamp, a plug assembly and a plug driving piece, the vertical quick clamp is used for fixing an oil-gas separator on the base, the oil-gas separator comprises an oil return port, an air inlet joint and an air outlet joint, and the plug assembly is used for fixing the oil-gas separator on the base. The outer side of the base is provided with an air inlet connector, an air channel is formed in the base, the air inlet connector is communicated with the oil return opening through the air channel, and the plug driving piece is used for driving the plug assembly to be close to or away from the oil-gas separator so as to plug or open the air inlet connector and the air outlet connector. The oil-gas separator airtightness detection device is simple in structure, high in automation degree and good in stability, and can effectively carry out airtightness detection on the oil-gas separator.

The utility model discloses a pulse back-blowing dust remover which comprises a shell, a dust removal unit is arranged in the middle of the shell, a dust removal assembly used for filtering dust is arranged in the dust removal unit, a dust removal subarea is arranged above the dust removal unit, airflow enters the dust removal subarea through the dust removal assembly, and the dust removal subarea is communicated with an exhaust pipeline through a stop valve. The side face of the shell is provided with an air inlet communicated with the air purification chamber, the air inlet is provided with an inwards-opened air door, the air door comprises a door plate, the upper end side of the door plate is hinged to the shell, the door plate is provided with a balance weight and a sealing strip, and closing and sealing of the air door can be achieved by means of self weight. A position sensor is arranged at the door plate to detect opening and closing and opening degree of the door plate, a pulse blowing assembly is arranged above the dust removal unit, the position of the door plate is sensed through the position sensor, and opening or closing of a stop valve and pulse back blowing are controlled. And high-pressure air is saved, the ash removal capability is high, the dust removal efficiency is high, the energy consumption is low, and the operation is stable and reliable.

The invention discloses a method for preparing high-performance carbon microspheres based on classification of waste cotton textiles, which comprises the following steps: aiming at the waste cotton textiles which are accumulated in the open air and have obvious aging difference, firstly carrying out mechanical opening and impurity removal and photocatalytic decontamination pretreatment, and then sorting the aging degree through a carbonyl sensitive fluorescent probe and laser irradiation, so as to obtain the high-performance carbon microspheres. The heavily aged hydrophobic fibers and the lightly and moderately aged hydrophilic fibers are obtained. Treating the lightly and moderately aged fibers with an ionic liquid repairing system, and then preparing regenerated high-strength fibers by adopting magnetic control liquid crystal spinning; the heavily aged fiber is subjected to catalyst-free hydrothermal carbonization and gradient KOH activation pore expansion, and the graded pore carbon microspheres are prepared. According to the method, different aged fibers are accurately utilized, the performance of regenerated products is improved, pollution is reduced, and the resource utilization rate and additional value of the waste cotton textiles are increased.

The invention relates to a light source system of an integrated closed heat dissipation structure. The light source system is mainly applied to equipment such as an ultraviolet phototherapy instrument. Aiming at the contradiction between potential safety hazards (liquid / dust invasion and ozone leakage) and heat dissipation efficiency in the existing open type air cooling heat dissipation scheme, the system innovatively adopts a totally-closed structure: a closed space for isolating the outside is formed by a sealed shell, and an internal circulation heat dissipation unit consisting of a heat conducting plate, a semiconductor chilling plate cold end and a double-circulation fan is arranged in the closed space. After cold air absorbs heat through the light source module, heat exchange is completed in a cold source fin air channel, and internal efficient circulation heat dissipation is achieved. And meanwhile, heat is led out through the hot end of the semiconductor chilling plate and an external cooling fan. The system has the advantages of airtight protection and active heat dissipation, external pollutants are effectively isolated, ozone leakage is prevented, the heat dissipation efficiency is improved through the multi-stage heat conduction design, the service life of a light source is prolonged, and the problem of contradiction between protection and heat dissipation in a traditional scheme is solved.

An apparatus and methods are provided for an air filter precleaner for an open air filter box. The air filter precleaner includes a filter medium between a base and a grating that are fastened over an opening into an interior of the air filter box. The filter medium comprises a sheet of filter material having a shape and a size suitable for being supported between the base and the grating. The base is a rigid member that supports the filter medium in a sheet configuration, such that the airstream passes through the filter medium before entering the air filter box. The grating is a rigid member comprising a screen portion surrounded by a frame that is configured to be fastened onto the air filter box. The screen portion comprises a shaped lattice that allows the airstream to pass through the filter medium before entering the air filter box.

The invention discloses a shoe which comprises a vamp and a sole, the sole is connected to the vamp to form a wearing space, the vamp and / or the sole are / is provided with vent holes, and the vent holes are communicated with the wearing space; the sole is provided with a flow guide device, a sole air inlet and a sole air outlet, and the sole air inlet is communicated with the wearing space. Through the arrangement of the structure, when the flow guide device works in use, air fluid enters the wearing space from the external environment through the vent holes, then flows into the flow guide device, and finally flows back to the external environment under the action of the flow guide device; therefore, an open air circulation flow path is formed between the wearing space and the external environment, and good ventilation and perspiration effects are achieved.

The application provides a control cabinet for smart grid, and belongs to the technical field of control cabinets. The control cabinet comprises a cabinet body, a refrigerating machine fixedly connected to the upper wall of the cabinet body, an external pipeline I arranged on one side of the refrigerating machine, an external pipeline II arranged on the other side of the refrigerating machine, an openable cabinet door arranged on the front side of the cabinet body, an air flow assembly arranged on the inner wall of the cabinet door and the cabinet body, an assembly component arranged in the cabinet body, and a heat removal unit arranged on the rear side of the cabinet body and connected to the air flow assembly. The application solves the problem that the control cabinet for smart grid is usually cooled by open air cooling, and external air is introduced into the cabinet by a fan to reduce the temperature. However, this method is prone to cause dust, water vapor and pollutants in the external environment to enter the cabinet body, thereby polluting electrical components.

The invention relates to the field of hydrogen fuel cell stacks, in particular to an open type air-cooled hydrogen fuel cell stack with a vibration self-cleaning function. Comprising a shell and a cell stack, the cell stack is composed of two side end plates and a plurality of bipolar plates, a cathode flow channel is formed between every two adjacent bipolar plates, the cooling fan is installed on one side of the shell, an installation frame and two side guide rods are arranged at the corresponding positions of the shell, and the two side guide rods are connected with the installation frame. The guide rods are arranged between end plates on the two sides of the cell stack in a penetrating mode in the stacking direction of the cell stack, the periphery of each guide rod is sleeved with an elastic layer, the vibration mechanism is arranged on the installation frame, and the vibration mechanism comprises a vibration generator, a vibration transmission structure connected with the vibration generator and a water collecting tank. The vibration generator is driven by air flow generated by the cooling fan, high-frequency micro-amplitude vibration self-cleaning of each bipolar plate is achieved in combination with the vibration transmission structure, and water films and particles in a cathode flow channel are effectively stripped and collected by the bottom water collection tank in a centralized mode.

The utility model relates to the field of display cabinets, and discloses an open air curtain display cabinet with a good refrigeration effect. The air curtain machine is arranged in the upper cabinet body and is used for blowing cold air to a cabinet opening of the upper cabinet body and forming a barrier so as to isolate external hot air; the top plate is mounted in the upper cabinet body; the protection mechanism is installed on the top plate and used for shielding the open area of the upper cabinet body when the display cabinet is not used. According to the air curtain display cabinet, the intelligent control protection mechanism is introduced, the air curtain display cabinet automatically closes the open area when no person approaches, the open area needing to be maintained by an air curtain system and a refrigerating system is reduced, energy consumption is remarkably reduced, the shielding curtain can effectively isolate external hot air, and the energy-saving effect is achieved; the intelligent combination of the inductor and the driving mechanism realizes the automatic on-off control of the protection mechanism, does not need manual intervention, and is convenient and efficient.

The utility model relates to the field of rock mass restoration, in particular to a rock mass restoration and reinforcement device for broken rock mass of stone cultural relics, and provides the following scheme aiming at the problem that the rock mass restoration and reinforcement device in the prior art has excessive intervention on a rock mass structure: the rock mass restoration and reinforcement device comprises a vertical supporting mechanism, the first jacks are fixed to the top face of the mounting plate, the supporting columns are detachably mounted on the bottom face of the mounting plate, and a mounting groove is formed in one end of the mounting plate; the side edge supporting mechanism comprises a movable plate movably arranged in the mounting groove, a fixed plate fixed to the top face of the movable plate, a second jack hinged to the outer wall of the side, close to the mounting plate, of the fixed plate, and a telescopic rod mounted at the output end of the second jack. The bottom and the side edges of a damaged rock mass can be conveniently supported, interference and damage to the rock mass are reduced, the whole device can be conveniently stored and transferred, and great convenience is brought to outdoor use of a user.

An in-ear earphone includes a digital signal processor (DSP), a speaker operatively coupled to the DSP; an external microphone operatively coupled to the DSP, and an in-ear earphone power management unit (PMU) to provide power to the DSP the speaker, and the external microphone. The in-ear earphone includes an earphone in-ear external sound-permitting tip operatively coupled to the in-ear earphone, the earphone in-ear external sound-permitting tip for insertion into a user's ear canal and including tip channels to allow noise to enter into the user's ear canal. The DSP executes computer-readable program code of a noise cancelling module to cancel, from audio input from the external microphone, sounds external to a user's ear canal.

The utility model discloses a smoke hood combined type oil smoke purifying and deodorizing machine which comprises a machine shell, the left end of the machine shell is fixedly communicated with an air inlet pipeline, the lower end of the air inlet pipeline is fixedly connected with a smoke collecting hood, and an oil smoke concentration sensor is fixedly installed on the inner wall of the smoke collecting hood. An anti-leakage mechanism, a suction fan, a high-voltage electrostatic oil smoke purifier and an air odor removal purifier are detachably mounted in the machine shell from left to right in sequence, a controller is arranged on the anti-leakage mechanism, and the suction fan, the high-voltage electrostatic oil smoke purifier and the air odor removal purifier are all in signal connection with the output end of the controller. When the cooking fume concentration sensor monitors cooking fume, the suction fan, the high-voltage electrostatic cooking fume purifier and the air odor removal purifier can be automatically started, when the cooking fume concentration sensor monitors that the cooking fume concentration is high, the air speed of the suction fan can be increased, the equipment does not need to manually touch a button, and the equipment can intelligently sense and automatically adjust the air speed; and the user experience and the use convenience are improved.

The utility model provides an air valve and an air valve module based on memory alloy driving, which comprise a shell, an air cavity is arranged in the shell, and two opposite ends of the air cavity are respectively provided with a normally open air port and a normally closed air port; an actuating piece is arranged in the air cavity and comprises a movable arm, a fixed arm and an elastic part for connecting the movable arm and the fixed arm; the movable arm extends towards one side, a plug is arranged at the free end of the movable arm, the plug is located between the normally-open air opening and the normally-closed air opening and connected with one end of a memory alloy wire, and the other end of the memory alloy wire is connected to the position, close to the elastic part, of the fixed arm. The memory alloy wire deforms after being powered on to drive the plug to move, and therefore opening and sealing closing of the normally-open air opening and the normally-closed air opening are achieved. The air valve has the advantages of being simple in structure, fast in response, accurate in control, low in power consumption, small in size, long in service life and the like, and is suitable for the fields of industrial automation, medical instruments, aerospace and the like.

The utility model relates to a fan with a detachable battery, which comprises a fan main body, the fan main body is provided with a mounting panel, the mounting panel is provided with a first power-on interface and a rechargeable battery pack arranged on the mounting panel, the rechargeable battery pack comprises a second power-on interface, and the second power-on interface is provided with a first power-on interface and a second power-on interface. The second power-on interface is electrically connected with the first power-on interface, and the rechargeable battery pack is detachably connected with the mounting panel through a clamping structure. According to the fan with the detachable battery, due to the fact that the detachable rechargeable battery bag connected in the clamping mode is arranged, the fan can work without an external power source, the portability of the fan is improved, and a user can use the fan outdoors or in the place without a power socket.

The invention discloses a reinforcing steel bar safety protection device for a building construction site, relates to the technical field of building construction, and solves the problems that most existing reinforcing steel bars are exposed, and exposed ends of vertical reinforcing steel bars are easy to cause puncture injury, such as falling of workers and collision during material carrying; the steel bars are easily rusted by rainwater and moisture when being stacked outdoors, and the tensile strength is reduced. A reinforcing steel bar safety protection device for a building construction site comprises a base, a transverse groove is formed in the front end face of the base, a drawer is movably arranged on the inner side of the transverse groove, a dehumidification device is arranged on the inner side of the drawer, a shell is installed on the upper end face of the base, and a groove is formed in the lower portion of one side of the inner wall of the shell. And a push plate is movably mounted on the inner side of the groove through a first moving mechanism. The reinforcing steel bar can be stored in the shell, and rusting of the reinforcing steel bar can be avoided. And workers are prevented from being hurt, and the steel bars can be conveniently taken out and transported.

The utility model relates to a luggage cabinet drawing assembly, including cabinet body and cabinet door, and cabinet body is provided with cabinet body support device, drawing board and drawing board support device, is provided with folding telescopic seat in the cabinet body, and the cabinet body is provided with folding telescopic support plate. The utility model discloses a luggage cabinet drawing assembly, simple structure, convenient to carry, integrates drawing frame, drawing board, drawing workbench and drawing seat, can carry all drawing tools, when drawing sketching in the open air, is more convenient, creates good condition for drawing.

The invention relates to the technical field of heat dissipation, in particular to the technical field of heat dissipation of personal computers, workstations and servers, and particularly relates to an open type air duct memory radiator. The radiator comprises radiating fins, a limiting component and a heat-conducting medium, wherein the radiating fins, the limiting component and the heat-conducting medium surround a memory bank to form an open air duct. The cooling fins are symmetrically arranged on the two sides of the memory bank; the limiting component is arranged between the two cooling fins and abuts against the top of the memory bank. And the heat-conducting medium is arranged on a memory chip of the memory bank and is in contact with the inner surfaces of the adjacent cooling fins. According to the internal memory radiator, internal accumulated heat is reduced through the open air duct, and the air flowing efficiency is improved; and heat generated during operation of the memory bank is directly conducted to the cooling fins through the heat-conducting medium, so that the heat conduction efficiency is improved. The flow guide type design of an open type air channel is combined with the direct heat conduction design, efficient heat dissipation is achieved, and stable operation of the memory bank is guaranteed.

The utility model belongs to the technical field of mounting structures, and relates to a simple surface mounting structure, which comprises a mounting shell, a mounting base and a mounting base, the fixed bracket is used for being mounted on a wall surface; the rotating bracket is used for rotationally connecting the mounting shell and the fixed bracket; the first end of the rotary bracket is rotationally connected with the mounting shell, and the second end of the rotary bracket is rotationally connected with the fixed bracket; and when the second end of the rotary bracket rotates around the first end, the fixed bracket exceeds or is lower than the outer surface of the mounting shell. According to the simple exposed installation structure, blind installation is not needed when a product hanger is installed, direct exposed installation can be achieved, and the installation efficiency is improved.

The utility model discloses a ventilation pipe fire-retardant device, which relates to the technical field of ventilation pipes, and comprises a ventilation pipe, two tuyere baffle tongues are arranged at the middle position of the inner wall of the ventilation pipe, and the two tuyere baffle tongues are arranged at the middle position of the inner wall of the ventilation pipe and can swing. A hexagon-headed bolt is installed in the middle of the ventilation pipe, the hexagon-headed bolt penetrates through the central axis of the ventilation pipe and extends out of the outer wall of the ventilation pipe, and a hexagon flange face locking nut is installed at the top end, extending out of the outer wall of the ventilation pipe, of the hexagon-headed bolt. When the temperature of the pipeline rises continuously due to fire or other reasons and reaches more than 68 DEG C, the fusing plate can fuse automatically (the fusing point of the fusing plate is low), at the moment, the fusing buckle fixing plates on the surfaces of the two normally-open tuyere blocking tongues are fixed through the fusing plate, then the torsion spring works rapidly, and the temperature of the pipeline rises continuously. The two tuyere blocking tongues are assisted to be closed, fire disasters are prevented from occurring or spreading, and the blocking and protecting effects are achieved.

The air conditioner indoor unit comprises a shell, a heat exchanger, a draught fan and an air duct, the shell comprises a shell body and a panel, an air outlet is formed in the shell body, one end of the panel is rotationally connected with the shell body, the panel shields the air outlet, a connecting assembly is arranged between the shell body and the panel, and the connecting assembly is connected with the shell body. The connecting assembly is used for opening or closing the air outlet; the connecting assembly comprises a first connecting part and a second connecting part, and when the connecting assembly closes the air outlet, the first connecting part and the second connecting part extend in the same direction based on the connecting position; and when the air outlet is opened by the connecting assembly, the first connecting part and the second connecting part extend back to back based on the connecting part. The first connecting part is connected to the shell body, the second connecting part is connected to the panel, the connecting assembly is arranged between the shell body and the panel by rotationally connecting the first connecting part and the second connecting part, and the panel is limited to be opened on the shell body through the first connecting part and the second connecting part.

The present application relates to the technical field of photovoltaic devices, and discloses a multi-source energy storage type photovoltaic energy-saving mushroom house heat pump drying device, which comprises a mushroom house, a heat pump and an energy storage device arranged on the left side of the mushroom house, and further comprises a cleaning part, a cleaning part and a vibration part; the cleaning part is installed on the mushroom house; the cleaning part is arranged on the mushroom house; the vibration part is installed on the top of the mushroom house; the cleaning part comprises a cleaning assembly and a collecting assembly; the cleaning assembly and the collecting assembly are arranged on the mushroom house; the cleaning assembly comprises a fixing block, an adjusting plate, a photovoltaic panel, a triangular block group one, a motor one and a screw rod. The present application solves the problem that the existing photovoltaic energy-saving mushroom house heat pump drying device is in the open air for a long time, and the photovoltaic panel is easily covered with dust and other impurities, which will cause the photoelectric conversion efficiency of the photovoltaic panel to decrease significantly, thereby affecting the power generation capacity of the whole device and the economy of the drying operation.

The utility model relates to the technical field of small household appliances for daily use, and discloses an air escape valve, an adsorption device, a base station and a window cleaning robot system. In the air release valve, a vent hole is formed in the first end of a shell; the shell is provided with an air leakage hole; the first end of the pull rod is inserted into the shell and connected with the sealing gasket; the pull rod is used for pushing the sealing gasket to seal the vent hole and / or pulling the sealing gasket to open the vent hole so as to communicate with the deflation hole for deflation. The base station comprises a base station body and the adsorption device. Wherein the air release valve is arranged in the base station body; the suckers are arranged at the bottom of the base station body and used for being adsorbed to the surface of an object to fix the base station body. According to the technical scheme, the air release valve controls the pull rod to push the sealing gasket to seal the vent hole, and the sealing gasket is pulled to release air from the air release hole. The air release valve can be closed and opened by directly operating the pull rod, so that adsorption and release of the sucker are controlled; the air release valve is simple, convenient and fast to operate and has no potential safety hazard.

The utility model discloses a surrounding air outlet structure for an air purifier, relates to the technical field of air purifiers, and specifically comprises a shell, an air inlet net, an air outlet net and a top cover, the shell comprises an outer shell, a supporting part and an inner shell, the inner shell is located in an inner cavity of the outer shell, and the top of the outer shell is connected with the top of the inner shell through the supporting part; a stepped groove is formed in the outer side of the connecting portion of the shell and the supporting portion, a round corner is arranged on the outer side of the connecting portion of the shell and the supporting portion, sealing blocks are evenly arranged on the top of the supporting portion, and an inserting groove is formed between every two adjacent sealing blocks. According to the surrounding air outlet structure for the air purifier, the air outlet net is provided with the air outlet flow guide design, so that 360-degree surrounding air outlet of the air purifier product is achieved; the lateral blowing scheme can reduce dust entering the machine, and the using effect is improved. Through the mechanical sealing design, the sealing contact end face is increased, the sealing effect is improved, and the sealing effect is stable and reliable.

The utility model relates to the technical field of range hoods, in particular to cavity equipment and a range hood. The cavity equipment comprises a cavity, a smoke barrier lifting device and a cover plate overturning device; the cavity is provided with a containing inner cavity, and an open air inlet is formed in the top of the containing inner cavity. The lifting smoke barrier device comprises a smoke barrier and a driving mechanism; one end of the driving mechanism can be connected with the smoke barrier, and the other end can be connected with the cavity; in the direction from the bottom to the top of the containing inner cavity, the driving mechanism is configured to drive the smoke barrier to ascend or descend in the containing inner cavity; the turnover cover plate device comprises a turnover motor and a turnover panel, and the turnover motor can be arranged at the opening of the cavity; an output shaft of the turnover motor can be connected with the turnover panel so as to drive the turnover panel to rotate to close or open the air inlet. In this way, the lifting operation of the smoke barrier can be independently controlled, and the overturning action of the overturning panel can be independently controlled.

The invention provides a test system and method for indirectly representing the shielding effectiveness of a carbon fiber composite material, and belongs to the technical field of shielding effectiveness test. According to the system, a rectangular resonant cavity with an air gap partial trepanning effect is adopted, and the microwave surface resistance of the carbon fiber composite material is tested in a microwave frequency band, so that the shielding effectiveness of the carbon fiber composite material can be accurately represented; an air gap with a certain distance is formed in actual measurement, so that a non-contact state is kept between the cavity and the to-be-tested sample, the influence caused by discontinuous contact between the sample and the cavity is reduced, and the test precision is improved; the whole testing device is simple and easy to implement.

1. The name of this design product: Planting robot. 2. Purpose of this design product: This design product is used for vegetable operation robots to achieve precise automatic driving in the open air and in vegetable greenhouses. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model relates to the technical field of emulsifier grinding, in particular to an emulsifier fine powder grinding device which comprises a grinding box and a feeding pipe fixedly connected to the top end of the grinding box and communicated with the grinding box, and an air inlet valve fixedly connected to the top end of the grinding box and communicated with the grinding box is arranged on one side of the feeding pipe. According to the powder material discharging device, through the arrangement of the air inlet valve, the discharging electromagnetic valve, the sealing box, the exhaust assembly, the storage table, the transparent cabinet door and the collecting box, when powder materials need to be discharged, the air inlet valve and the discharging electromagnetic valve are opened, an air pump is started, the sealing box is sealed, and the sealing box is sealed; powder materials on the inner side of the grinding box are rapidly discharged into the collecting box through the discharging electromagnetic valve, discharging of the powder materials can be accelerated through the design of the air inlet valve and the connecting assembly thereof, the working efficiency is improved, solid dust on the inner side of the sealing box can be blocked through the design of the exhaust assembly and the connecting assembly thereof, and the situation that dust flies and harms the health of workers is avoided.