42results about How to "Achieve protective effect" patented technology

The utility model discloses a fire hydrant device for fire-fighting early warning, and relates to the technical field of fire hydrants. The fire hydrant device for fire early warning comprises a fire hydrant body, a driving mechanism is arranged on the outer side of the fire hydrant body, a buffer structure is arranged on the outer side of the driving mechanism, the driving mechanism comprises a fixing frame, and an electric hydraulic push rod is fixedly installed on the inner wall of the fixing frame; a connecting rod is fixedly installed at the movable end of the electric hydraulic push rod, and a lifting frame is installed at the other end of the connecting rod. An electric hydraulic push rod on the inner side of the fixed frame can be used for controlling the lifting frame through a connecting rod to realize a height adjusting function, so that the total height of the fixed frame and the lifting frame is flexibly adjusted according to the actual use requirement and the idle state of the fire hydrant main body, and the use convenience of the fire hydrant is ensured; and meanwhile, safety protection in a non-use state is also guaranteed, so that an all-around protection effect is achieved.

This utility model belongs to the technical field of oracle bone translation assistance, specifically relating to an auxiliary device for multilingual intelligent oracle bone translation. It includes a base, with a concave frame fixedly connected to the upper end of the base. The left and right ends of the concave frame are movably connected to the left and right sides of a threaded rod, respectively. The threaded rod is threadedly connected to a mounting bracket with a threaded hole at its lower end. Through the cooperation of the electric telescopic rod body, connecting frame, toothed plate, gear, rotating shaft, L-shaped plate, and scanning bracket, this utility model enables the recognition scanning lens body to rotate downwards around the rotating shaft into the protective housing after use, thus achieving protection for the recognition scanning lens body in idle state. The cooperation between the fixed plate, limiting rod, and L-shaped bracket allows for convenient adjustment of the positions of the two pressure plates according to the size of the document to be scanned.

The utility model discloses a double-layer shell high-strength corrosion-resistant valve which comprises a valve body, a valve shell is arranged outside the valve body, a valve element is arranged in the valve shell, and the two ends of the valve shell are fixedly connected with pipelines communicated with the valve shell. The two pipelines are slidably connected with protective shells matched with the valve shell in a sleeving mode, the opposite ends of the two protective shells are open, sound insulation cotton is fixedly connected to the inner walls of the protective shells, and the two pipelines are fixedly connected with fixing plates in a sleeving mode. The valve is reasonable in structure, the protective shell is arranged outside the valve shell, noise generated when the valve body works can be effectively isolated through the sound insulation cotton arranged in the protective shell, the mute effect of the valve body can be greatly improved, meanwhile, the valve shell can be protected, and the service life of the valve body is prolonged. And external collision and dust pollution are avoided.

The utility model provides an intelligent fire-fighting box based on Internet of Things, and relates to the technical field of fire-fighting boxes, the intelligent fire-fighting box comprises a fire-fighting box body, the fire-fighting box body is used for placing fire-fighting equipment, one side of the fire-fighting box body is provided with a protective door through a hinge, and the protective door can protect the fire-fighting equipment in the fire-fighting box body. The protection device is fixedly installed on the periphery of the fire box body, the protection device comprises a plurality of air bags and four installation frames, the four installation frames are fixedly installed on the periphery of the fire box body, the auxiliary device is arranged in the installation frames, the air bags are detachably installed in the installation frames, and the air bags are detachably installed in the installation frames. According to the fire-fighting box, the fire-fighting box body is surrounded by the plurality of air bags arranged on the protection device, so that the effect of protecting the fire-fighting box body is achieved, and the situation that the fire-fighting box body is damaged due to the fact that an automobile or a heavy object collides with the fire-fighting box body is avoided.

The utility model relates to pile cap technical field discloses a kind of precast concrete pipe pile pile cap, including pile cap, the pile cap outside is provided with protection assembly, the protection assembly includes protective cover, the protective cover slidingly connects in the outer wall of the pile cap, the protective cover top is fixedly connected with thread reinforcing bar, the protective cover inner wall is provided with connecting ring, the connecting ring is located at the top of the pile cap, the connecting ring outer wall is provided with buffer assembly, the pile cap outer wall is provided with positioning assembly.In the utility model, the hammering force is dispersed by the thread reinforcing bar, and the buffer assembly is used to slow down the hammering force, so as to achieve the protection effect of the product. The problem of cracks caused by stress concentration during the long-term hammering process of the traditional product by the pile hammering machine is solved. Especially when bearing vertical load or horizontal seismic force, the cracks will expand to the pile body, affecting the overall carrying capacity. The vertical carrying capacity of the product is enhanced.

The utility model provides a flexible protection structure for a power line, which relates to the technical field of flexible protection structures for power lines, and comprises a power line, a rubber sheet is fixedly connected to the surface of the power line, a protection device is arranged on the surface of the power line, and a plug and a bolt are fixedly connected to the two ends of the power line respectively. A storage device is arranged on the surface of the power line, the protection device comprises a protection frame arranged on the surface of the power line in a sleeving mode, the protection frame is made of a deformable silica gel material, a rectangular plate is fixedly connected to the side face of the protection frame, a through groove is formed in the surface of the rectangular plate, and a bolt is inserted into the through groove; the side face of the rectangular plate is fixedly connected with a nut, the bolt is in threaded connection with the nut, the surface of the rectangular plate is fixedly connected with a base plate, the base plate is a rubber plate, and the problem that the power line cannot be used due to the fact that rubber on the surface of the power line is easily bitten by pets is solved.

The utility model relates to the technical field of carrying robot, and disclose a kind of for cold chain logistics carrying robot, including robot car body, the surface of robot car body is equipped with placing bin, the inside of placing bin is equipped with sliding slot, the inside sliding connection of sliding slot has expansion bin, the top of expansion bin is fixedly connected with moving mechanism, the front and rear ends of robot car body are all fixedly connected with anti-collision mechanism.The carrying robot for cold chain logistics, by the setting of moving mechanism, when using, according to the size of the height size of carrying goods, the storage space can be adjusted in real time, the electric push rod of both sides is started, and the electric push rod is retracted and drives the top expansion bin to slide inside the placing bin, to adjust the size of storage space, so as to realize the effect of carrying goods of different height, improve the flexibility and versatility of equipment in use process.

The utility model relates to the technical field of veneering hot presses, in particular to a special-shaped curved surface veneering hot press. The hot press comprises a hot press body, a plurality of heat dissipation holes are formed in the surface of the hot press body, a dustproof device is arranged on the surface of the hot press body, the dustproof device comprises a fixing frame, the fixing frame is fixedly connected with the surface of the hot press body, and a dustproof plate is connected to the surface of the fixing frame in a sliding mode. A rotating rod is rotatably connected to the surface of the fixing frame, a baffle is fixedly connected to the arc surface of the rotating rod, sliding rods are fixedly connected to the two sides of the fixing frame, and special-shaped plates are slidably connected to the arc surfaces of the sliding rods. The problems that in the long-time using process of the hot press body, a heating element generates heat for a long time, the temperature in the hot press body is too high due to much dust and slow heat dissipation at heat dissipation holes of the hot press body, and the aging speed of parts of the hot press body is increased are solved.

The utility model discloses a hazardous chemical substance transportation tank protection device which comprises two connecting shells, one side of the inner wall of each connecting shell is fixedly connected with a protection plate, a protection assembly is arranged outside each connecting shell, and an adjusting assembly is arranged on the outer wall of each connecting shell. The adjusting assembly comprises multiple sliding blocks, one sides of the multiple sliding blocks are fixedly connected to the outer wall of the connecting shell on one side, a groove is formed in each sliding block, the multiple sliding blocks are slidably connected to the interior of the connecting shell on the other side, bolts are arranged in the connecting shells, one ends of the bolts penetrate and extend to the exteriors of the sliding blocks and the rubber sleeves, and the other ends of the bolts penetrate through the rubber sleeves. And one end of each bolt is in threaded connection with a nut. The sliding block on the outer wall of the connecting shell on one side slides in the connecting shell on the other side to be matched with the outer wall of the tank body in length, then the connecting shells are fixed through bolts and nuts, the effect of adjusting the length of the equipment is achieved, and the problems that traditional equipment is relatively fixed in length and inconvenient to use are solved. And partial areas of the outer wall of the tank body are not protected in place.

The utility model relates to fluid pump valve technical field, and disclose a kind of leakage-proof fluid pump valve parts, including flange plate body, the surface of flange plate body is equipped with compression device, compression device includes sealing sleeve ring, sealing sleeve ring is slidably connected with the surface of flange plate body, the surface of sealing sleeve ring is slidably connected with compression plate, the both sides of compression plate are fixedly connected with short rod, the arc surface of two short rods is slidably connected with push plate, fixed rod is slidably inserted in push plate, one end of fixed rod is fixedly connected with round plate, the arc surface of flange plate body is equipped with two fixed slots, the arc surface of fixed rod is covered with spring, the both ends of spring are fixedly connected with round plate and push plate respectively, the arc surface of short rod is rotatably connected with rotary ring.This kind of leakage-proof fluid pump valve parts, avoid the gap in flange plate body, cause fluid to leak, thereby leading to the situation that the efficiency of fluid pump is reduced.

This utility model relates to the field of injection molding machine technology and discloses a sliding component for injection molding machines, including a horizontal plate. An electric slide rail is fixedly mounted on the outside of the horizontal plate. A moving block is fixedly connected to the output end of the electric slide rail. A column is fixedly connected to one side of the moving block. A support rail is fixedly connected to the side of the horizontal plate. A connecting shaft is fixedly connected to the outside of the column. A support wheel is rotatably connected to the outside of the connecting shaft. The support wheel is slidably connected inside the support rail. A guide block is fixedly connected to one side of the column. A cylinder is fixedly mounted on the outside of the guide block. A push rod is fixedly connected to the output end of the cylinder. A moving column is fixedly connected to one end of the push rod. This utility model has the following advantages and effects: This device can not only perform lateral and longitudinal displacement of the injection nozzle, but also the movement process is smooth and the movement effect is highly stable.

The invention discloses a picture library combined high-speed rail insulator inspection image recognition method, and relates to the technical field of high-speed rail insulator inspection image recognizing.The picture library combined high-speed rail insulator inspection image recognition comprises a fixing base, an adjusting mechanism, a cleaning mechanism and a camera device, the adjusting mechanism is arranged on the fixing base, and the camera device is arranged above the adjusting mechanism; and the cleaning mechanism is arranged above the fixed seat. By arranging the cleaning mechanism, a camera lens of the camera device can be cleaned, when a high-speed train moves at a high speed, the impact force of wind can push a wind shield to move backwards, so that a cleaning frame can be driven to move backwards, and a sponge strip at the bottom of the cleaning frame is used for wiping the camera lens of the camera device to remove dust and dirt on the camera lens; when the high-speed rail train stops, the cleaning frame can move forwards under the action of the reset spring, dirt cleaning is conducted on the lens of the camera device again, and the phenomenon that the shot picture is not clear due to the fact that the lens of the camera device is polluted is avoided.

This utility model discloses a corner joint structure for a window frame with insulated built-in blinds, relating to the field of insulated built-in blinds technology. It includes a window frame body with a corner protection mechanism on one side. This utility model, through the corner protection mechanism, facilitates the splicing and installation of the window frame corners while protecting workers. The two window frame bodies are spliced ​​and installed through the cooperation of the mounting block and mounting groove, and the cooperation of the threaded hole and bolt. The corner protector prevents the spliced ​​window frame corners from being sharp or pointed, avoiding the cumbersome process of splicing the corners, which often requires professional personnel or a long time. This ensures the ease of installation and avoids the risk of injury to workers' hands or feet due to the sharp corners of traditional window frames, thus guaranteeing the safety and reliability of the structure.

The utility model relates to the technical field of rubber clack check valves, and discloses a stainless steel rubber clack check valve which comprises a valve seat, two supporting blocks are installed on the inner wall of the valve seat, one side of each supporting block is fixedly connected with a protection mechanism, and the left side of the valve seat is connected with a connecting pipe A in a penetrating mode. According to the stainless steel rubber clack check valve, through the arrangement of the protection mechanism, when the stainless steel rubber clack check valve is used, a silica gel pad on the back of a rubber clack body is in lap joint with the bottom of a valve seat, a water source bursts through the rubber clack body to form a passage after water is introduced, and after the water source is closed, the rubber clack body bears opposite acting force provided by two torsion springs on the top; when the valve seat is opened, the rubber clack body returns to the initial position, the valve seat is sealed, at the moment, the bottom of the rubber clack body and the inner bottom of the valve seat are abraded, friction between the rubber clack body and the valve seat is replaced with the added silica gel pad, and therefore the effect of protecting the rubber clack body is achieved, and the service life of equipment is prolonged.

The utility model discloses a head anti -collision device for psychiatric patient, including external shield and internal shield, the lower extreme between the lower extreme of external shield inner chamber and the external surface of internal shield is fixedly connected with hollow rubber buffer pad, the periphery of the upper end of external shield inner chamber and the periphery of the upper end of the external surface of internal shield are all fixedly connected with foam buffer block, the middle end fixedly connected with fixed sleeve of the top of the external surface of internal shield, the top of external shield is fixedly installed with alarm, fixed shell and power supply battery in proper order from front to back. The utility model discloses through the setting of external shield, foam buffer block, hollow rubber buffer pad and internal shield, the head wearing of psychiatric patient is convenient, can carry out the impact buffering protection when the head and the object of patient due to the onset and produce the impact, effectively reduces the impact of the head caused in the process, reaches the effect of the protection of the head of patient.

According to the technical scheme, the light-weight high-strength seamless pipe comprises a seamless steel pipe and a carbon fiber sleeve, a weight reduction groove is formed in the seamless steel pipe and close to the outer surface, a carbon fiber pipe is installed in the weight reduction groove in an interference mode, and a carbon fiber column is installed in the middle of the inner surface of the carbon fiber pipe. Nylon strips are installed at the positions, located on the two sides of the carbon fiber column, in the carbon fiber pipe, a magnesium-aluminum alloy pipe is installed on the outer surface of the seamless steel pipe, a carbon fiber sleeve is installed on the outer surface of the magnesium-aluminum alloy pipe, a boss is installed on the inner surface of the magnesium-aluminum alloy pipe, and a groove is formed in the position, located at the boss, of the outer surface of the seamless steel pipe. The light-weight and high-strength seamless pipe solves the problems that an existing seamless steel pipe needs a large wall thickness to achieve corresponding strength, the weight of the seamless steel pipe is large, the load of an installation support is increased, and the seamless pipe is prone to falling off in the using process, the overall weight of the seamless steel pipe is reduced, and therefore safe use of the seamless pipe is guaranteed.

The utility model relates to the technical field of purification equipment, in particular to a purification window for a purifier. The air purifier comprises a purifier body, the surface of the purifier body is provided with a dismounting device, the dismounting device comprises a U-shaped frame, the U-shaped frame is fixedly connected with the surface of the purifier body, the surface of the U-shaped frame is provided with two sliding grooves, the surfaces of the two sliding grooves of the U-shaped frame are connected with sliding frames in a sliding mode, and the sliding frames are connected with the purifier body in a sliding mode. A sliding frame is fixedly connected to the surface of the U-shaped frame, a plurality of layers of filter screens are fixedly connected to the surface of the sliding frame, a handle is fixedly connected to the surface of the sliding frame, L-shaped plates are fixedly connected to the two sides of the U-shaped frame, limiting rods are slidably inserted into the L-shaped plates, two limiting blocks are fixedly connected to the surface of the sliding frame, and limiting grooves are formed in the surfaces of the limiting blocks. The problems that the multilayer filter screen cannot be used normally and the filtering effect of the multilayer filter screen is reduced due to the fact that the multilayer filter screen is damaged after being used for a long time are solved.

The utility model relates to the technical field of hardware fitting machining equipment, in particular to an automatic feeding device for precise hardware fitting machining. The conveying device comprises supporting tables, the surfaces of the supporting tables are rotationally connected with a conveying belt, the surfaces of the supporting tables are fixedly connected with a storage bin, fixing devices are arranged on the surfaces of the supporting tables, each fixing device comprises two fixing plates, and the two fixing plates are fixedly connected with the surfaces of the supporting tables. A threaded hole is formed in the surface of the fixing plate, a threaded rod is rotationally connected to the inner wall of the threaded hole, a round block is fixedly connected to one end of the threaded rod, a containing plate is fixedly connected to the other end of the threaded rod, and a rubber plate is slidably connected to the inner surface of the containing plate. And the problem that in the hardware fitting conveying process of an automatic feeding device, hardware fittings are likely to be separated from the machining position, so that some hardware fittings are not machined, and manual secondary treatment needs to be conducted is solved.

This application relates to the technical field of reverse osmosis membranes, and discloses a highly chlorine-resistant hydrophilic membrane and its preparation process. The hydrophilic membrane includes a membrane body and a first chlorine-resistant layer and a second chlorine-resistant layer sequentially disposed on the surface of the membrane body. The first chlorine-resistant layer uses raw material components including laccase, dopamine, 5,5-dimethylhydantoin, and a stabilizer. The concentration of the laccase is 0.1-0.3 wt%, the concentration of the dopamine is 0.8-1.2 wt%, the concentration of the 5,5-dimethylhydantoin is 0.3-0.6 wt%, and the concentration of the stabilizer is 0.2-0.4 wt%. The second chlorine-resistant layer is obtained by crosslinking a first carboxymethyl dextran and a second carboxymethyl dextran. The molecular weight of the first carboxymethyl dextran is smaller than that of the second carboxymethyl dextran, and the weight ratio of the first carboxymethyl dextran to the second carboxymethyl dextran is (1-5):1. This application can improve the durability of chlorine resistance and maintain good water flux.

The utility model discloses a mine topographic survey unmanned plane with landing buffer structure belongs to mine topographic survey unmanned plane technical field, the utility model discloses a unmanned plane body, the unmanned plane body bottom is installed with first support rod, and the unmanned plane body bottom is installed with the surveyor, the first support rod bottom slidingly connected with guide rod, and the guide rod bottom is installed with support seat, this mine topographic survey unmanned plane can protect the surveyor on the unmanned plane when not using the unmanned plane, prevent the surveyor on the unmanned plane to accumulate dust, reduced the maintenance cost of unmanned plane, and can avoid the sandstone that unmanned plane lifts up and collides the surveyor when the unmanned plane takes off, effectively protected the surveyor, can effectively carry out landing buffer when the unmanned plane is landing, prevent the unmanned plane from receiving greater impact, and if the impact degree is bigger when landing can protect the surveyor and reduce the maintenance cost of surveyor.

The utility model relates to a kind of teaching power amplifier equipment, belong to teaching aid technical field, including cabinet and power amplifier control host, the upper end of cabinet is provided with through-hole, and the inside of cabinet is fixedly installed with sliding plate, the inside sliding of sliding plate is connected with baffle, the lower end of baffle is linked installation has lifting plate, power amplifier control host is fixedly installed in the upper end of lifting plate, the lower end of sliding plate middle position is fixedly installed with electric telescopic rod, and the telescopic end of electric telescopic rod is fixedly connected with baffle, the front end of cabinet is embedded with sound, power amplifier control host is lifted by lifting plate, it is convenient to be raised to the upper of cabinet or be lowered to the inside of cabinet, use or storage, when storage, reach the effect of protecting power amplifier control host, and when storage, the descent of lifting plate, drive baffle moves in the inside of sliding plate, the exposed through-hole is plugged, improve the utilization effect of cabinet upper surface, it is convenient for teaching use.

The utility model provides a high-frequency high-voltage gamma ray flaw detector, which particularly relates to the technical field of ray flaw detection and comprises a flaw detector body, a lifting handle is fixedly connected to the top of the flaw detector body, a positioning seat is fixedly connected to the bottom of the flaw detector body, and a mounting mechanism is arranged at the bottom of the flaw detector body. When the flaw detection machine body needs to be used for flaw detection of a pipeline, the flaw detection machine body is simply positioned through a positioning seat, then a control shaft is rotated through a grip, so that a stress plate is pushed in the process of pushing an inclined plate to move, a supporting shaft rotates to drive a mounting arc plate to rotate, and the rotated mounting arc plate coincides with a fixed arc plate; the flaw detection pipeline is wound and fixed, so that the flaw detection machine body is stably mounted, the effect of stably mounting the flaw detection machine body is achieved, and it is ensured that equipment cannot move or incline in the using process.

The application belongs to the technical field of high water level pipe network dredging device, in particular to a high water level pipe network dredging device, which comprises a dredging assembly, a sewage pipe, a vertical shaft and a driving well; the vertical shaft is communicated with the sewage pipe, and the driving well is communicated with the vertical shaft; the booster pump is pushed to slide along the limiting pipe by the propeller until it slides to the position where the sludge at the bottom of the sewage pipe needs to be cleaned, then the sewage sucked by the water inlet pipe on the right side of the booster pump is pressurized by the booster pump, and then sprayed out through the water jet pipe to spray the sludge at the bottom of the sewage pipe, and the sprayed sludge flows to the downstream of the sewage pipe under the action of water flow, reducing the accumulation of sundries in the sewage pipe; the device has efficient dredging function, can use the power and pressure of water flow to flush and remove the accumulated material, ensures the smoothness of the pipeline and avoids the accumulation of sludge in the sewage pipe, can greatly improve the dredging efficiency of long-term high water level pipe network, and reduce the maintenance cost and labor input.

The utility model discloses a device of prefabricated pier reinforcement cage pedestal relates to prefabricated pier reinforcement cage technical field, the utility model discloses a bottom plate, the top fixedly connected with pedestal of bottom plate is provided with fixed mechanism in the inside of pedestal. The utility model discloses through the mutual cooperation between the fixed mechanism's threaded rod, fixed arc plate and torsional spring etc. component, when installing reinforcement cage, the staff places reinforcement cage at the top of pedestal through the tower, and the motor drive threaded rod rotates, drives threaded bush straight -line movement, and then promotes push rod, and push rod promotes the stressed plate, drives the support axle rotation, and then drives the rotation of connecting plate and fixed arc plate, and fixed arc plate presses down and clamps reinforcement cage. When adjusting, push rod leaves the stressed plate, and fixed arc plate is automatically reset through the torsional spring elasticity, and the design reaches the effect of the stable fixing of reinforcement cage, ensures that reinforcement cage is positioned stably and accurately during installation.

The application discloses a kind of multistage active and passive protection battery module of lithium ion battery, including lithium ion battery body and metal shell, the inside of the metal shell is equipped with heat control mechanism, the lithium ion battery body is equipped in heat control mechanism inside, the upper end of the lithium ion battery body is equipped with tab, pressure relief valve and fire-retardant agent respectively, the inside bottom of the metal shell is equipped with liquid cooling plate, the lithium ion battery body is equipped in the upper end of liquid cooling plate, the inside upper end of the metal shell is fixedly installed with energy directional pipe, the inside of the energy directional pipe is equipped with fire-resistant pressure-resistant cover plate, the upper end of the fire-resistant pressure-resistant cover plate is equipped with one-way spray valve, the left and right sides of the metal shell are symmetrically equipped with vent opening.This scheme is through fire-retardant agent on the lithium ion battery body and the buffer zone above cooperation, when lithium ion battery body occurs thermal runaway, temperature rises, reaches the melting point of wrapping material, fire-retardant agent is released into buffer space, can effectively inhibit fire.

The utility model belongs to the field of geological exploration sampling, and particularly relates to a stabilizing mechanism for a geological exploration sampling device, which comprises an outer cylinder, a connecting rod is slidably connected to an inner cavity of the outer cylinder, a connecting plate is fixedly connected to one end of the connecting rod, and a supporting structure is arranged at the other end of the connecting rod; the extension plates and the transmission gear are integrally formed, the transmission gear and the extension plates are rotationally connected to the inner cavity of the support, when the extension plates are combined, a drill bit of the sampling device body in the inner cavity of the lifting cylinder can be protected, and the lifting cylinder can lift and slide along the inner cavity of the outer cylinder; as the tooth surface of the transmission gear abuts against one side of the transmission plate to form a meshing state, when the transmission cylinder descends, the transmission gear can be driven to drive the extension plate to synchronously rotate and unfold to form a supporting leg, and a bottom plate at the other end of the extension plate makes contact with the ground and can be fixedly connected with the ground by adopting a ground bolt to penetrate through an insertion hole. The effects of being portable and protecting the drill bit of the sampling device are achieved.

The utility model discloses a pressure testing machine. Its technical scheme main points are: a pressure testing machine, including the detection mechanism for detecting the sample compression resistance degree and setting in the detection mechanism one side for showing the control cabinet of sample compression resistance intensity, the outside of detection mechanism is provided with the protection mechanism, and the protection mechanism includes the protection frame and the protection board of sliding setting on the protection frame, and the bottom fixedly connected with the adjusting block for adjusting the position of protection board of protection board bottom, the bottom of protection frame corresponds the clamping groove of adjusting block and is opened, and the top and bottom of protection board all are provided with fixed assembly no.

The utility model relates to the technical field of filtering equipment, and discloses a coal-fired power plant boiler make-up water raw water filtering device which comprises a filtering bin, a first filtering net is arranged in the filtering bin, one side of the first filtering net is fixedly connected with a collecting box, and a protection assembly and a recycling assembly are arranged on the outer wall of the first filtering net. The protection assembly comprises a plurality of second springs, the second springs are located on the outer wall of the first filter screen, a plurality of first connecting blocks and second connecting blocks are fixedly connected to one side of the first filter screen, a fixing block is slidably connected to the outer wall of each second connecting block, and a second filter screen is fixedly connected to one side of each fixing block. One end of the second spring is fixedly connected to the outer wall of the second connecting block, and the other end of the second spring is fixedly connected to the inner wall of the fixing block. According to the device disclosed by the utility model, the scouring force of water flow to the surface of the filter screen I is relieved through the stretching of the spring I and the compression of the spring II, so that the effect of protecting the filter screen I is achieved, and the protection property of the device to the filter screen I is enhanced.

The utility model belongs to the technical field of tablet anti-falling, and relates to a tablet anti-falling device for English learning, which comprises a protective frame, a protective cavity is enclosed in a frame body of the protective frame, a learning tablet can be placed in the protective cavity, and a heat dissipation assembly is mounted on the protective frame. A mounting groove is formed in the lower position of a cavity body of the protection cavity, a first net plate is mounted at the top of the mounting groove, a second net plate is mounted at the bottom of the mounting groove, fixing seats are symmetrically mounted between the first net plate and the second net plate, rotating seats are mounted on the fixing seats, fan blades are mounted on seat bodies of the rotating seats, and driving devices are mounted in the rotating seats. The driving device can drive the fan blades to rotate, and an auxiliary fixing assembly is installed on the protection frame. Through cooperation of the heat dissipation assembly and the auxiliary fixing assembly, it can be guaranteed that the heat dissipation requirement is met when the flat plate is protected, meanwhile, the flat plate is prevented from being popped out when falling off, and the protection effect on the flat plate is further achieved.

The utility model relates to the technical field of engineering supervision patrol recorders, and discloses an engineering supervision patrol recorder, which comprises a patrol recorder main body, the switch button is arranged on one side of the patrol recorder main body; the camera is arranged on the front surface of the patrol recorder main body; the fixing assembly is arranged on the back surface of the patrol recorder main body; and the protection assembly is arranged on the front surface of the patrol recorder main body. The handle is pulled, the handle drives the connecting column to move through the connecting block, the connecting column moves to drive the limiting block to move, after the limiting block moves to leave the first limiting groove, the handle is rotated, the handle rotates to drive the connecting column to rotate through the connecting block, the connecting column rotates to drive the gear to rotate through the limiting block, and the gear rotates to drive the rack to move. And the rack moves to drive the movable baffle to move, so that opening and closing of the movable baffle can be controlled, and the effect of protecting the camera is achieved.