31results about How to "Easy to achieve sealing" patented technology

The invention discloses a memory alloy driving device by adoption of gas isolating cold and hot working media. The memory driving device by adoption of the gas isolating the cold and hot working media comprises a moving structure, a driving structure and a cold-hot water and gas circulating control structure, wherein the moving structure is composed of blades, connecting rods, hinge pins and supporting frame firming pieces. The driving structure of each blade is composed of memory alloy springs, air cylinders, two fixing round plates, pressure springs and push rods. Three holes of the front section fixing round plate are connected with ends of the three air cylinders in a threaded mode, and three square holes of the rear section fixing round plate are connected with the three supporting frame firming pieces in a interference fitted mode. The cold-hot water and gas circulating control structure is composed of a cold water pump, a hot water pump, a cavity, an electronic control unit box, an air pump, a two-position and three-way electromagnetic directional valve, a vent valve, an enter stroke hose, a return stroke hose, various connecting pieces and the like. The memory alloy driving device by adoption of the gas isolating the cold and hot working media has the characteristics of being low in noise, less in environmental influence, low in energy consumption, high in theoretical thermal efficiency and low in cost, and is mainly applied to the field of water transportation tools.

The invention relates to an automatic tea fermentation system. A passage for enabling a fertilization box to pass through is formed in a fermentation tunnel; a pushing device is arranged at one end of the fermentation tunnel; a discharge device is arranged at the other end of the fermentation tunnel; and a water mist spray pipe and a heating device are arranged in the fermentation tunnel. A fermentation method employing the above-mentioned automatic tea fermentation systems comprises the steps of: loading fresh leaves into fermentation tanks; pushing the fermentation tanks into a fermentation tunnel in turn by a pusher; controlling oxygen content, temperature and humidity in the fermentation process; after fermentation, pushing the fermentation tanks to unloading equipment by the pusher, so as to realize automatic tea fermentation. The invention employs a structure containing the fermentation tunnel located in the fermentation chamber cooperated with the pusher, and reduces the volume of the fermentation space, thereby reducing energy consumption radically and reducing the chance of contamination by bacteria as well.

The invention discloses a modularized forming machine waste heat recovery machine. The waste heat recovery machine comprises a shell and a heat exchange device, wherein the shell is provided with a waste gas inlet, a waste gas outlet, a fresh air inlet and a fresh air outlet; the heat exchange device comprises a heat pipe, a partition plate and fins; the partition plate is arranged on the heat pipe; the fins are arranged on two sides of the pipe body of the heat pipe; the heat pipe is vacuum and is filled with working medium; and the working medium is heat conducting oil. In the waste heat recovery machine, fresh air can be effectively heated by waste heat of the waste gas discharged by a thermal forming machine and then is returned into the thermal forming machine, so that production cost is saved, heat energy recovery rate is increased, matters such as cotton batting, rag and the like included in the waste gas can be filtered, and fire hazard can be eliminated.

The invention provides an introspection magnetic inertial navigation monitoring system for a dam. A flexible detecting tube is embedded in the dam body; a monitoring device walking along the flexible detecting tube is arranged in the flexible detecting tube; a triaxial magnetic flux door sensor and an accelerometer are arranged in the monitoring device; and a calculation chip is arranged in the monitoring device. By means of the combination of the flexible detecting tube and the monitoring device with the triaxial magnetic flux door sensor and the accelerometer, the introspection magnetic inertial navigation monitoring system for a dam can improve the monitoring accuracy and overcome the problem that an existing fiber gyroscope is great in the accumulated error and the zero drift error is difficult to compensate, and takes an almost changeless geomagnetic sensing line as the measuring reference and improves the data accuracy obtained by the whole monitoring device. By coordinating with the high-accuracy accelerometer and other devices, the introspection magnetic inertial navigation monitoring system for a dam can further improve the measuring accuracy of the data and greatly reduce the engineering cost. For the introspection magnetic inertial navigation monitoring system for a dam, the accuracy for flexibility deformation of the flexible detecting tube can reach 1 millimeter.

The invention relates to the technical field of vacuum metallurgy equipment, in particular to a vacuum reduction furnace for electromagnetic induction heating melting reduction of magnesium metal. The vacuum reduction furnace comprises a furnace body (1), a hopper (4) made of a hard insulating material is arranged in the furnace body (1), and a center channel penetrating the bottom face of the hopper (4) is arranged in the center position of the hopper (4); one or more annular grooves (7) are concentrically arranged in the bottom face of the hopper (4), and iron in the solid state or the molten state is arranged in the grooves (7); a rectangular iron core (6) is arranged in the furnace body (1), one side of the rectangular iron core (6) penetrates the center channel of the hopper (4), and the other side of the rectangular iron core (6) is wound with a primary side coil (9); and the leading-out end of a copper winding of the primary side coil (9) is led out of the furnace through an insulation sealing device on the furnace body (1) so as to be connected with a power device. The vacuum reduction furnace is reasonable in design, distribution of a temperature field of the reduction furnace can be adjusted, and the heat transferring efficiency is high; and the vacuum reduction furnace is used for thermal reduction production of high-vapor-pressure metal such as magnesium, lithium, strontium and calcium and the like.

The invention relates to the field of traditional Chinese medicine smashing equipment, in particular to a traditional Chinese medicine mashing machine. The traditional Chinese medicine mashing machinecomprises medicine mashing tubes, medicine mashing rods and a bracket. Hanging brackets are mounted on the bracket, and positioning holes for allowing the medicine mashing rods to penetrate through are formed in the hanging brackets. The medicine mashing rods penetrate into the positioning holes in the hanging brackets, one ends of the medicine mashing rods are connected with medicine mashing heads, and the other ends of the medicine mashing rods are connected with magnets. The positions, between the magnets and the hanging brackets, of the medicine mashing rods are provided with springs in apenetrating mode, one ends of the springs are connected with the hanging brackets, and the other ends of the springs are connected with the magnets. Electromagnets are mounted on the positions, opposite to the magnets, of the hanging brackets, and the medicine mashing tubes are arranged below the medicine mashing rods. According to the traditional Chinese medicine mashing machine, a traditional Chinese medicine can be automatically mashed, the smashing fineness is even, the processing speed is high, the production efficiency is high, workers only conduct medicine adding and discharging work after smashing, and accordingly the working intensity is small.

The invention belongs to the technical field of radio frequency microwaves, and particularly relates to a high-isolation power divider / combiner. The power divider / combiner comprises a waveguide cavity, the waveguide cavity comprises a first end and a second end which are opposite to each other, the first end is provided with a waveguide port for power input or output, the second end is closed by aconductive shell to form a waveguide short-circuit surface, a window is arranged above the waveguide cavity adjacent to the waveguide short-circuit surface, and through the window, the waveguide cavity is coupled with the microstrip circuit; a microstrip circuit comprises a substrate, two paths of microstrip lines are arranged on the upper end surface of the substrate, and the lower end surface of the substrate comprises a section of joint part used for covering the window of the waveguide cavity; and a waveguide filling medium fills the window of the waveguide cavity and is used for connecting the substrate of the microstrip circuit with the waveguide ridge of the waveguide cavity. According to the structure, power distribution / combination is directly realized while waveguide microstripconversion is carried out, good isolation is realized, the structure is more compact, and miniaturization design of the system is facilitated.

The invention discloses a stacked filter. The stacked filter comprises a filter body, an oil way cover plate and a filter element; the filter body is installed between a valve station and a plate type hydraulic valve, the oil way cover plate is detachably installed on the filter body, the filter body is provided with a filter element cavity, the filter element is arranged in the filter element cavity, a main oil passage is arranged in the filter body and is communicated with the filter element cavity, and a medium entering the main oil passage is led to the outer side of the filter element in the filter element cavity; a filter oil inlet is formed in one side surface of the filter body, a filter oil outlet is formed in the other side surface of the filter body, the filter oil inlet is communicated with the main oil passage, and the filter oil outlet is communicated with the filter element cavity through an oil way in the oil way cover plate. The stacked filter locally filters a control valve with higher precision requirements to form local protection under the condition that the filtering precision of the main oil passage is not high and the filtering reliability is not enough, so that the service lives of equipment and a system are prolonged.

The invention discloses an earthquake electromagnetic disturbance observation system and an observation method based on an induction type magnetic sensor. The wide-band induction type magnetic sensoris used in the field of geophysical exploration and the like, and is difficult to directly apply to observations of the seismic electromagnetic disturbance. The system comprises a data acquisition module and an induction type magnetic sensor; the core of the data acquisition module adopts the NI data acquisition platform; the inductive magnetic sensor comprises a magnetic coil module and a circuitmodule; the magnetic coil module converts the seismic electromagnetic disturbance signal into a voltage signal, and then performs pre-amplification, filtering processing and post-stage amplificationthrough the circuit module, and transmits the seismic electromagnetic disturbance signal to the computer through the NI data acquisition platform. According to the characteristic of the frequency bandof the seismic electromagnetic disturbance signal, the earthquake electromagnetic disturbance observation system and observation method based on induction type magnetic sensor designs the magnetic coil module and the circuit module of the inductive magnetic sensor, converts the seismic electromagnetic disturbance signal into a voltage signal, and collects and processes the data through the NI data acquisition platform to obtain the low noise. The high-sensitivity signal output is suitable for the observation of the electromagnetic disturbance of the earthquake.

The invention discloses a single-station high-pressure water filling production line. The single-station high-pressure water filling production line comprises a filling machine body, and a conveying line is transversely mounted in the middle of the upper side of the filling machine body. A lower support is mounted on the lower side of the filling machine body, and a filling chamber is mounted at the position, in the middle of the upper side of the conveying line, of the filling machine body. Feeding and discharging ports are formed in the two sides of the lower end of the filling chamber, andlifting sealing plates are mounted on the inner side of the feeding and discharging ports. An air cylinder is mounted at the top in the filling chamber, a filling head is mounted on the lower side ofthe air cylinder through a filling seat, and the filling head communicates with a water tank through a water conveying pipe. One side of the upper end of the filling chamber is connected with a vacuumizing pump, and a PLC control cabinet is mounted on one side of the lower end of the lower support. According to the single-station high-pressure water filling production line, the filling chamber canbe vacuumized, vacuum filling is achieved, the production purity of drinking water is improved, and the filling efficiency is high.

The invention relates to the technical field of hydraulic pressure, in particular to a load maintaining sheet type multi-way valve which comprises a valve body, a valve element, a one-way valve hole, at least one pilot oil cavity, a middle body and an on-off mechanism. A valve element hole, working oil cavities, an oil inlet cavity and an oil return cavity are formed in the valve body, the working oil cavities, the oil inlet cavity and the oil return cavity are communicated with the valve element hole, the oil inlet cavity is connected with an oil inlet, and the oil return cavity is connected with an oil return opening; the valve element is arranged in the valve element hole and used for oil way conversion; the one-way valve hole is communicated with one working oil cavity, a one-way valve is arranged in the one-way valve hole, and a cavity communicated with the corresponding working oil cavity is formed in the one-way valve; the middle body is provided with a pilot channel and a middle channel, the pilot channel is used for communicating the pilot oil cavity with the valve element hole to push the valve element to move, and the middle channel is communicated with a cavity body of the one-way valve; and the on-off mechanism is used for communicating or disconnecting the middle channel and the pilot oil cavity. According to the load maintaining sheet type multi-way valve, oil in the cavity body of the one-way valve communicates with the middle channel at the end of the valve element hole, so that sealing between the cavity body of the one-way valve and the valve element hole is conveniently achieved.

The invention relates to the medical field, specifically a medical plastic recycling device, including a cleaning structure, a cover plate, a casing, a limiting structure, a sharps storage structure, a guiding structure and a storage structure; the inside of the casing is arranged in two A storage structure for storing garbage and a sharps storage structure for storing sharps; the top of the casing is provided with a guiding structure for guiding the cover plate and a limiting structure for limiting the guiding structure; the side wall of the casing is provided with a Liquid cleaning structure. The inside of the shell of the present invention is provided with two storage structures for classifying and storing medical waste, which facilitates the treatment of medical waste and avoids the secondary treatment of waste. The storage of sharp tools avoids the damage of the operator when disposing of garbage. The use of the cleaning structure facilitates the filtration of medical waste liquid in medical waste, facilitates the treatment of medical waste liquid, and prevents medical waste liquid from polluting the environment.

The invention provides a magnetic and inertial navigation monitoring system inside a dam. A flexible detection tube is embedded in the dam body, a monitoring device that walks along the flexible detection tube is installed in the flexible detection tube, and a three-axis magnetic sensor is installed in the monitoring device. The door sensor and the accelerometer are also provided with a solution chip in the monitoring device. By using a combination of a flexible detection tube and a monitoring device with a three-axis fluxgate sensor and an accelerometer, the monitoring accuracy can be improved, and the problems of the existing optical fiber gyroscopes with large cumulative errors and difficult compensation of zero drift errors can be overcome, and almost fixed The constant geomagnetic induction line is used as the measurement reference to improve the accuracy of the data obtained by the entire monitoring device. Cooperating with high-precision accelerometers and other equipment can further improve the measurement accuracy of data and greatly reduce engineering costs. The accuracy of the invention for the deflection deformation of the flexible detection tube can reach 1 mm.

The invention discloses a memory alloy driving device that uses gas to isolate hot and cold working fluids, including a motion structure, a driving structure and a hot and cold water gas circulation control structure; the motion structure is mainly composed of blades, connecting rods, pins, and bracket stabilizers. . The driving mechanism of each blade mainly consists of a memory alloy spring, a cylinder, two fixed discs, a compression spring, and a push rod. The three holes of the disc are threadedly connected to the ends of the three cylinders respectively, and the three pairs of square holes of the disc are connected to the three bracket stabilizers using an interference fit. The hot and cold water gas circulation control structure mainly consists of a cold water pump, a hot water pump, a cavity, an electronic control component box, an air pump, a two-position three-way electromagnetic reversing valve, a gas storage tank, an exhaust valve, a process hose, a return hose, Composed of various connectors, etc. This device has the characteristics of low noise, little impact on the environment, low energy consumption, high theoretical thermal efficiency, and relatively low cost. It is mainly used in the field of water surface transportation vehicles.

The invention relates to the technical field of detection, and discloses a high-protection detection kit which solves the problems that a kit is low in storage performance and poor in protection performance of reagent liquid to be detected, the high-protection detection kit comprises a kit body and a sealing cover, the sealing cover is installed at the top end of the kit body, an opening is formed in one side of the kit body, and the sealing cover is installed at the top end of the kit body. An opening is formed in the kit body, a drawing box is inserted into the opening, the kit body and the drawing box are connected through a locking mechanism, a supporting frame located above the drawing box is arranged in the kit body, and a storage box located in the kit body is arranged at the top end of the supporting frame; by arranging the kit body, the sealing cover, the opening, the drawing box, the locking mechanism, the supporting frame and the storage box, double storage of the kit body is conveniently achieved, and the storage performance of the kit body is effectively improved; and through the design of the fixing mechanism, reagent tubes can be conveniently clamped and fixed, the situation that reagent liquid is mixed due to mutual collision of the reagent tubes is avoided, and the reagent liquid is protected.

The invention discloses a stacked filter. The stacked filter comprises a filter body, an oil way cover plate and a filter element; the filter body is installed between a valve station and a plate type hydraulic valve, the oil way cover plate is detachably installed on the filter body, the filter body is provided with a filter element cavity, the filter element is arranged in the filter element cavity, a main oil passage is arranged in the filter body and is communicated with the filter element cavity, and a medium entering the main oil passage is led to the outer side of the filter element in the filter element cavity; a filter oil inlet is formed in one side surface of the filter body, a filter oil outlet is formed in the other side surface of the filter body, the filter oil inlet is communicated with the main oil passage, and the filter oil outlet is communicated with the filter element cavity through an oil way in the oil way cover plate. The stacked filter locally filters a control valve with higher precision requirements to form local protection under the condition that the filtering precision of the main oil passage is not high and the filtering reliability is not enough, so that the service lives of equipment and a system are prolonged.

The invention discloses a coal underground gasification continuous pipe and a connection method thereof. The continuous pipe comprises a titanium alloy pipe body and a titanium alloy pipe body, the pipe end of the stainless steel continuous pipe body and the pipe end of the titanium alloy pipe are connected through threads meshing with each other, the portion between the stainless steel continuouspipe body and the titanium alloy pipe body is sealed, and the connecting parts of the stainless steel continuous pipe body and the titanium alloy pipe body are fixed through a countersunk pin in theradial direction. The connection method comprises the steps that the stainless steel continuous pipe body is fixed, the threads on the stainless steel continuous pipe body and on the titanium alloy pipe body are coated with high-temperature locking grease, the titanium alloy pipe body is screwed into the stainless steel continuous pipe body by using a preset make-up torque, then a pin connection threaded hole with a counter bore is drilled between the titanium alloy pipe body and the titanium alloy pipe body in the radial direction, and finally, the countersunk pin is screwed into the pin connection threaded hole. According to the continuous pipe, the titanium alloy pipe body is connected to the front end of the titanium alloy pipe body, so that the high temperature resistance and corrosion resistance of the pipe end of the underground gasification continuous pipe can be improved, and performance requirements of the coal underground gasification process for pipes are met.

The invention relates to the technical field of cable bridges, and discloses a cable bridge structure with high impact resistance, which solves the problem of low space utilization rate caused by cable accumulation due to the fact that cables cannot be stored in a layered manner in a cable bridge, and comprises a groove body, wherein a groove cover is arranged at the top end of the groove body, two parallel partition plates are arranged in the groove body, protruding blocks are arranged on the two sides of the top end of the groove body at equal intervals, grooves arranged outside the protruding blocks in a sleeving mode are formed in the bottom end of the groove cover, a first accommodating groove is formed in the groove cover, a mounting mechanism connected with the protruding blocks is arranged in the first accommodating groove, a second accommodating groove is formed in one side of the groove body, and a third accommodating groove is formed in the other side of the groove body. By arranging the groove body, the groove cover, the two partition plates, the protruding blocks, the groove, the first accommodating groove, the mounting mechanism, a stabilizing set and a height adjusting mechanism, layering of the groove body is achieved, then layered storage of cables is achieved, and the space utilization rate of the cable bridge is effectively increased.

The invention discloses a gas tank protective cover for fire escape. The purpose is to solve the existing problem that a gas tank is not easy to move. The gas tank protective cover for the fire escapeincludes a protective cover body, a seal cover is fixedly installed at the lower end of the protective cover body, connecting plates are symmetrically welded to the top end of two sides of the protective cover body, and pull rings are fixedly installed on the lower surfaces of the connecting plates. Guide pipes are symmetrically welded to the lower ends of two sides of the protective cover body,guide rods are welded to the sides of the guide pipes, the guide pipes sleeve drill rods, motors are installed on the upper sides of the drill rods, guide rings are fixedly installed on the sides of the motors, and second spiral springs sleeve the guide rods. Pull ropes are fixedly connected to the top ends of the motors, hooks are fixedly installed at the top ends of the pull ropes, an explosion-proof layer is fixedly installed on the inner side of the protective cover body, and a seal ring is inlaid in the top end of the protective cover body. The gas tank protective cover for the fire escape is a safe type gas tank cover, the gas tank is conveniently moved, at the same time, the function of explosion proof is further provided, and more safety is achieved.

The invention discloses an internal-pressure forming method for a magnetic medium-assisted pipe. The internal-pressure forming method for the magnetic medium-assisted pipe is an internal-pressure forming method for a medium of a pipe, and used for solving the series problems of difficult sealing, the need of subsequent cleaning, poor force transfer effect and the like of traditional mediums during internal-pressure forming for a pipe. The stress state, the deformational behavior and the coordination sequence of each part during internal-pressure forming for a pipe are changed through adjusting the rheological property of a magnetorheological fluid under the action of a controllable magnetic field, and quantitative controllable loading based on on-demand distribution is realized. The method comprises the following steps: fully filling a pipe blank (4) with the prepared magnetorheological fluid (5); arranging the pipe blank (4) in a cavity formed by an upper punch pin (1), a concave die (3) and a lower punch pin (6); changing the rheological property of the magnetorheological fluid (5) through the action of the magnetic field to realize different force transfer effects; the upper punch pin (1) moves downwards to load and transfers an action force through the magnetorheological fluid (5), so that the needed parts of the pipe generate deformation; and the magnetic field and the upper punch pin (1) are removed after forming, and the obtained workpiece is taken out. The method disclosed by the invention is used for internal-pressure forming for a medium of a pipe.

The invention relates to the technical field of soil sampling, and discloses a sampling device for geographic data acquisition, and solves the problems of high labor input and low acquisition efficiency of manual soil acquisition, and low soil acquisition accuracy caused by easy mixing of acquired soil with other soils, the device comprises a box body, supporting columns are symmetrically arranged at the bottom end of the box body, the bottom ends of the supporting columns are provided with moving wheels, a first through groove is formed in the middle of the bottom end of the box body, four second through grooves are formed in the bottom end of the box body, supporting rods are inserted into the four second through grooves in a penetrating mode, the four supporting rods are connected through height adjusters, and a height adjusting mechanism is arranged in the box body. The bottom end of the height adjusting mechanism is provided with a lead screw barrel penetrating through the interior of the first through groove, a sampling barrel is arranged below the lead screw barrel, a soil loosening mechanism is arranged outside the sampling barrel, and a sampling mechanism is arranged inside the sampling barrel; according to the design, manual sampling is avoided, labor input is effectively reduced, and meanwhile the sampling efficiency is improved.

The invention discloses an auxiliary device for form stripping of a pervious concrete test block and a form stripping method. The auxiliary device comprises a cover body, a sealing strip and connecting devices, wherein the cover body is of a box body-shaped structure of which the lower end is provided with an opening; the opening in the lower end of the cover body is used for butting against an opening in the upper end of a test mold; the sealing strip is annular and is used as a sealing element between the two openings; the connecting devices are used as connectors between the cover body andthe test mold when the two openings are butted. The method comprises the following steps: closing the upper end of the test mold; introducing compressed gas into the test mold and separating the testmold from the test block after the test mold expands. According to the auxiliary device and the method, efficient form stripping of the pervious concrete test block can be realized by using compressedair.

The embodiment of the invention discloses a spraying device for environment-friendly machining in the technical field of machining. The spraying device comprises a base, a cover seat is arranged abovethe base, the cover seat and the base are fixed through a mounting bracket, a first push rod motor is fixed to the upper surface of the cover seat, the power output ends of the first push rod motor is connected with side cover plates through push rods, one side of the bottom of each side cover plate makes contact with the upper surface of the base, a spray gun capable of being adjusted in the height direction of the side cover plate is installed on each side cover plate, and a workbench is arranged in the middle of the upper surface of the base. According to the spraying device for environment-friendly machining, through cooperation of the retractable side cover plates, the base and the cover base, sealing treatment can be conveniently carried out on a to-be-sprayed mechanical component,pollution of spraying paint to the surrounding environment is reduced, and when the side cover plates are opened, a bin door can be formed by the gap between the side cover plates, so that the mechanical component is conveniently placed in the bin door.

The invention belongs to the technical field of remote operation and relates to a separable master-slave manipulator stretching movement transmission system. The separable master-slave manipulator stretching movement transmission system comprises a driving transmission chain, a through-wall transmission shaft and a driven transmission chain which are connected sequentially; the driving transmission chain comprises a driving transmission chain inner pipe, a first steel belt, a second steel belt, a driving transmission chain fixed belt wheel and a driving transmission chain bevel gear drum; thedriven transmission chain comprises a sleeve, a third steel belt, a fourth steel belt, a driven transmission chain fixed belt wheel, moving belt wheels, a driven transmission chain bevel gear drum, agear component, a middle pipe through-wall transmission shaft and a motor; and the sleeve is composed of a driven transmission chain inner pipe and a driven transmission chain middle pipe which are independent of each other and relative to each other. By utilizing the transmission system provided by the invention, sealing of a through-wall pipe can be conveniently realized without influencing movement transmission of manipulators on the premise of guaranteeing the personal safety of an operator.

The invention relates to the field of ventilating equipment, in particular to ventilating and energy-saving equipment for a green building. The ventilating and energy-saving equipment comprises a windspeed adjusting structure, a supporting frame, a filtering structure, an adjusting rod, a draught fan, and a flow guiding structure. The filtering structure used for filtering raindrops and dust in the air is arranged at the end, with a storing space, of the rectangular supporting frame. The supporting frame is internally provided with the draught fan used for promoting air circulation. The supporting frame is internally provided with the flow guiding structure used for ventilating and flow guiding. The supporting frame is provided with the wind speed adjusting structure used for adjusting the ventilation and air exchange amount. The wind speed adjusting structure is provided with the adjusting rod used for adjusting the distance between the flow guiding structure and the wind speed adjusting structure. The filtering structure is fixed to the supporting frame by bolts and is matched with the draught fan to use, and therefore the direction of the air flow changes when the air flow passes through the filtering structure. The raindrops and large dust particles in the air are filtered and stored, and therefore the performance of ventilating and air exchanging is greatly improved, andthe ventilating and energy-saving equipment can be applied to buildings of different types.

The invention discloses high-definition digital transmission equipment suitable for mobile communication, and relates to the technical field of digital transmission equipment, the high-definition digital transmission equipment comprises an equipment shell, the equipment shell is of a hollow rectangular structure, two open grooves are formed in the side wall of the equipment shell, and the inner space and the outer space of the equipment shell are communicated through the open grooves; a plurality of draught fans and a travel switch are installed on the inner wall, located between the two open grooves, of the equipment shell, and the travel switch is electrically connected with the draught fans. By arranging the telescopic driving mechanism, cooperative movement of the rod body, the connecting rod, the net plate and the baffle plate is conveniently realized, so that shielding and starting of the fan on the digital transmission equipment are realized, internal and external communication heat dissipation of the equipment is conveniently realized when the draught fans are exposed, and sealing and dust prevention of the equipment can be realized when the draught fans are shielded by the baffle plate; and on-demand communication heat dissipation can be carried out according to high and low peaks of mobile communication, and sealing and dust prevention are achieved.

The application belongs to the field of radio frequency microwave technology, and in particular relates to a power divider and combiner with high isolation. The power divider and combiner includes a waveguide cavity, including a first end and a second end opposite to each other. The first end is set as a waveguide port for power input or output, and the second end is closed by a conductive shell to form a short waveguide. On the road surface, there is a window above the waveguide cavity adjacent to the short-circuit surface of the waveguide, through which the waveguide cavity is coupled with the microstrip circuit; the microstrip circuit includes a substrate, and two microstrip circuits are arranged on the upper end surface of the substrate. line, the lower end surface of the substrate includes a joint portion used to cover the window of the waveguide cavity; the waveguide filling medium is filled at the window of the waveguide cavity, and is used to connect the substrate of the microstrip circuit with the waveguide ridges of the waveguide cavity. The structure directly realizes power distribution / combination while the waveguide microstrip is converted, and also realizes good isolation, and the structure is more compact, which is beneficial to the miniaturization design of the system.