48results about How to "Guaranteed disassembly" patented technology

A closing link for a bicycle chain that includes a first outer link plate having a first elongated hole and a first chain pin extending therefrom and a second outer link plate having a second elongated hole and a second chain pin extending therefrom. The first chain pin is received in the second elongated hole and the second chain pin is received in the first elongated hole Each chain pin has a head at one end, a foot at the other end and a groove therebetween. Each elongated hole has a larger diameter end, a smaller diameter end and a displacement region therebetween. The larger diameter end has a diameter larger than a diameter of the pin head. The smaller diameter end receives the groove of the chain pin and includes a countersink to receive the pin head. The displacement region includes sides having recessed and unrecessed portions. The recessed portions have a smaller depth than a depth of the countersink at least in the region of the countersink.

The invention relates to a device (2) for sealing and evacuating or applying gas pressure to a paste-like liquid in a container, the interior chamber thereof having a cylindrical inner contour (12). Said device comprises: a seal (8) which is arranged on a circumference of the device (2) and is adapted to be inserted into the cylindrical inner contour (12) of a container in order to seal the circumference of said container, and which delimits the exterior (18) of the device (2) from the interior (20) of the device; a connection device (22) which is arranged on the exterior (18) of the device (2) and which is configured for connecting an evacuation pump; and an open-pored, porous wall (24) in the interior of the device (2), said wall having a conduit connection (25) to the connection device (22).

Turbocharger comprising a shaft, a housing, a turbine wheel and a compressor wheel mounted onto the shaft, at least one rolling bearing located between the shaft and the housing and comprising an inner ring, an outer ring and at least one row of rolling elements between raceways provided on the rings.Said turbocharger comprises at least one intermediate sleeve radially located between the shaft and the inner ring of the rolling bearing.

The invention discloses a self-climbing operation platform for a hoistway. The self-climbing operation platform comprises a tower body system and a wall attaching system; the wall attaching system comprises two attaching mechanisms vertically fixed to the two adjacent sides of the elevator hoistway; the tower body system comprises a top work mechanism, a tower body and a bottom drive mechanism which are sequentially and fixedly connected from top to bottom; and the tower body is in vertical sliding connection with the two attaching mechanisms at the same time. The operation platform comprises the tower body, the two attaching mechanisms fixed in the hoistway and the bottom drive mechanism arranged at the lower portion of the tower body. The tower body is connected with a guide rail frame at different heights by dismounting and mounting the attaching mechanisms to the guide rail frame, the purpose of self ascending and descending in the hoistway is finally achieved, and the construction work requirement is met. The multiple construction problems that at present, an operation construction platform in the hoistway is difficult to erect, and material transportation is difficult are solved.

The invention relates to a modular finished product partition system. The modular finished product partition system is characterized in that a steel adjusting base is connected with a main building floor through expansion bolts, and the upper top face of the steel adjusting base is adjusted to be in the ground horizontal line; a lower groove integrated aluminum alloy baseboard is connected with the steel adjusting base; a steel upper groove is connected with a grid hanging upside down through tapping screws and is adjusted to be in a top face locating line; an L-shaped steel panel fastener is connected with a finished product veneer through tapping screws and fastened into a hole portion prefabricated in a steel main keel; an L-shaped steel glass frame fastener is connected with an aluminum alloy frame through self-plugging rivets, a glass panel is combined into a whole through a prefabricated groove portion and fastened into the hole portion prefabricated in the steel main keel through the L-shaped steel panel fastener; and an aluminum alloy door cheek is meshed with a concave-convex portion fabricated in the steel main keel through a prefabricated concave-convex portion, and then fixed through tapping screws. The modular finished product partition system solves the problems of manual coarseness and inaccuracy in traditional decoration and reduces the thickness of a wall.

The invention discloses a mounting and dismounting device for a wind driven generator coupler. The mounting and dismounting device comprises a carrying platform mechanism and a height adjustment mechanism, wherein the carrying platform mechanism is used for carrying the coupler to be mounted or dismounted; and the height adjustment mechanism is fixed below the carrying platform mechanism and used for adjusting the level of the carrying platform mechanism to facilitate mounting or dismounting of the coupler. The device has the advantages that the device is simple and compact in structure and convenient to use and operate, and can reduce working strength and risks, and the couplers in different specifications can be quickly and precisely mounted or dismounted.

The invention discloses novel polyvinyl chloride (PVC) mother solution treatment method. The PVC mother solution is passed through a primary cooling and a secondary cooling to an anaerobic pool and an aerobiotic pool to apply biochemical treatment, then the product is put into a coagulating sedimentation pool to settle the sludge, at last, the product is filtered by submerged ultrafiltration, so as to produce the qualified water. The novel PVC mother solution treatment equipment has a good water treatment effect and high operating stability, can be used for effectively treating the PVC mother solution for a long time, and is relatively low in operating cost and high in quality of output water.

The invention provides a hub-shaped cutter and a cutting device which is a two-axle opposite type with an opposite positioned main axles assembly, remaining the assembly-disassembly character of the hub-shaped cutter, and decreasing the space of the opposite positioned hub-shaped cutters to the best of it's abilities.The hub-shaped cutters(60) are mounted on each main axle (52) of two group of main axle assemblies (51), wherein the two group of main axle assemblies are disposed approximately coaxially and can move in the axial direction.A blade (62) is provided at the peripheral portion of one lateral side of the base station (61), and the other lateral side thereof is provided as a screw seat surface (61c).The screw seat surfaces (61c) face to each other, and the cutter is fixed to the main axle (52) by fastening the fixation nut (55) on the screw seat surface (61c).A concave portion (63) is provided on the screw seat surface (61c) of the base station (61) to back off the surface fixing the nut (55).

The invention discloses a train model for a tunnel pressure wave test. The train model comprises a chassis 8 and a train body 12 installed on the chassis. Slide ways that slide on track steel ropes and enable the train model to be suspended on the steel ropes are arranged at four corners of the train body respectively. Support standing columns 10 are formed by a front support column and a rear support column that are arranged on the chassis vertically and symmetrically. An X-shaped clamp arm 9 is arranged between the front support column and the rear support column by a hinge shaft 11. On thebasis of the structure, a motor drives a traction steel rope and thus the train model is driven to complete tunnel pressure wave testing at the slide ways, so that the experiment cost is lowered. On the basis of the rapid traction and clamping structure, the clamping device is in a loosening state all the time before the motor is accelerated at a designated speed; and after the motor drives the traction steel rope to arrive at a designated speed, a wedge-shaped pressing block is loosened instantaneously and the clamping device clamps the traction steel rope instantaneously, thereby realizing high-speed starting of the train and reducing the starting accelerating speed substantially.

The invention relates to the technical field of diesel tanks, and particularly discloses an integrated diesel tank. The integrated diesel tank comprises an integrated tank body, a fuel filter, a ureatank and a pipeline valve body; the integrated tank body comprises a cylindrical structure and two end plates; openings are formed in two ends of the cylindrical structure; the two end plates are arranged on the openings in both ends of the cylindrical structure in a covering manner respectively; the integrated tank body is internally provided with an accommodating cavity for accommodating dieseloil; the side wall of the cylindrical structure is recessed to form a U-shaped groove; the fuel filter is arranged in the U-shaped groove and is connected with the wall of the U-shaped groove; the urea tank comprises a tank body and a filling port, and is arranged in the accommodating cavity; the side wall of the cylindrical structure is recessed to form an L-shaped groove; the pipeline valve bodycommunicates with the urea tank; and the pipeline valve body is arranged in the L-shaped groove and is connected with the wall of the L-shaped groove. The integrated diesel tank provided by the invention has a compact and reasonable structure, the leakage of the urea tank is avoided, an original fuel filter bracket and an original urea tank bracket are omitted, the weight and cost of the completevehicle are reduced, the size of the fuel tank is increased, and the convenience of disassembly and maintenance are ensured.

The invention relates to the technical field of anodic aluminum oxide porous membranes, in particular to an electrochemical deposition support for preparing a nano material. The support comprises a substrate, a front cover plate, a support base and a conductive assembly, the substrate is fixed through the front cover plate and the support base, the conductive assembly is arranged on the support base, the substrate is connected with the conductive assembly, and a through hole A is further formed in the front cover plate in a penetrating mode. According to the support, the structure is stable, the fixing effect of the substrate is good, the sealing performance is good, and the conductive assembly can be prevented from being corroded by an electrolyte; the whole body is of an assembly type structure, no glue or bonding structure is arranged, disassembling, assembling and parts replacement are easy, and the long-term effective use of the device is facilitated.

The invention discloses a proton exchange membrane fuel cell in the technical field of proton exchange membrane fuel cells. The fuel cell comprises a fuel cell stack, the upper end face and the lower end face of the fuel cell stack are fixedly connected with end plates, one end face of each end plate is provided with a plate body, a fan is arranged in the plate body, and a connecting mechanism is arranged between the fan and the plate body; the connecting mechanism comprises a first contact plate, a second contact plate and a connecting block, the connecting block is fixedly connected to the upper end face of the fan, the first contact plate is fixedly connected to one end face of the connecting block, the second contact plate is fixedly connected into the plate body, the connecting block is slidably inserted into the plate body, and the first contact plate and the second contact plate are in mutual contact and buckled connection. The installation efficiency is high, additional wiring operation does not need to be conducted on a wiring part in the disassembly and assembly process, the maintenance operation of a worker on the fan can be greatly improved, circuit connection is stable and safe, and practicability is high.

The utility model provides a transformer heat dissipation assembly which comprises an oil tank, heat dissipation fins and a connecting piece, two connecting pipes are arranged on the upper portion and the lower portion of the side face of the oil tank, the heat dissipation fins are fixedly arranged on the connecting pipes and communicated with the connecting pipes, the connecting piece is fixedly arranged between the connecting pipes and the heat dissipation fins, and flanges are arranged on the heat dissipation fins and the connecting pipes respectively. The two flanges are fastened through a fastener, a first lining and a second lining are arranged on the two flanges respectively, and the connecting piece is arranged in the first lining and the second lining. According to the transformer heat dissipation assembly, through matched arrangement of the connecting pieces, the heat dissipation pieces and the oil tank, the sealing performance between the oil tank and the heat dissipation pieces can be improved, oil leakage is avoided, through arrangement of the flanges, it is guaranteed that the heat dissipation pieces can be disassembled and assembled, the heat dissipation pieces and the oil tank can be cleaned conveniently, and the heat dissipation efficiency is improved. Through the cooperative arrangement of the first lining and the second lining, installation of the cooling fins is facilitated, the installation efficiency is improved, and through the arrangement of the compensation part, it is ensured that the sealing sleeve can always generate the sealing effect.

The invention discloses an intelligent automobile interior environment monitoring and heat dissipating control system. The intelligent automobile interior environment monitoring and heat dissipating control system has the advantages that the limitation that existing automobile interior environment detecting technologies do not have automatic automobile interior parameter real-time monitoring functions or man-machine intelligent communication functions can be broken through by the aid of the intelligent automobile interior environment monitoring and heat dissipating control system, and the problem of incapability of automatically dissipating heat in automobile interior environments when existing automobiles are parked and stalled and are positioned under sun exposure conditions can be solved by the aid of the intelligent automobile interior environment monitoring and heat dissipating control system; multiple parameters of the temperatures, formaldehyde, CO concentration, smoke concentration and PM 2.5 (particulate matter 2.5) concentration of interior environments of an automobile can be monitored by the intelligent automobile interior environment monitoring and heat dissipating control system in real time and can be displayed by the aid of mobile phones, an alarm can be given when the CO concentration and the smoke concentration exceed standards, and heat in the interior environments can be automatically dissipated by the intelligent automobile interior environment monitoring and heat dissipating control system when the automobile is parked and stalled and is positioned under sun exposure conditions; mobile phone APP (application) and control systems with DSP (digital signal processors) as cores are combined with one another to implement a function of automatically andintelligently controlling systems, and a function of automatically dissipating the heat when the automobile is positioned under the sun exposure conditions during parking and stalling can be implemented by the aid of a miniature air conditioner, which is mounted on a foot placing location of a co-driver cab, under the control.

The invention discloses a quick release type swing barrel tee joint, which relates to the technical field of material distribution tee joints, and comprises a tee joint main body, a feed hopper, a swing barrel, a cleaning port, a cleaning door and a track, and the swing barrel is positioned in the tee joint main body and can swing in the tee joint main body. The cleaning opening is formed in one side of the tee joint body, the cleaning door is arranged on the outer side of the cleaning opening, the swing barrel can be detached and cleaned by opening the cleaning door, the two foldable rails are arranged in the tee joint body, the foldable extending rails are arranged at one ends of the rails, and after the cleaning door is taken down, the swing barrel can be detached and cleaned. The rails and the extending rails can be unfolded outwards, the pulleys are arranged on the two sides of the swing barrel and can slide out along the rails and the extending rails, so that the swing barrel can be rapidly disassembled, the swing barrel can be rapidly reset through guiding of the rails and the extending rails after being cleaned and overhauled, and the disassembly and assembly efficiency of the swing barrel can be effectively improved.

The invention relates to the technical field of diesel tanks, and particularly discloses an integrated diesel tank. The integrated diesel tank comprises an integrated tank body, a fuel filter, a ureatank and a pipeline valve body; the integrated tank body comprises a cylindrical structure and two end plates; openings are formed in two ends of the cylindrical structure; the two end plates are arranged on the openings in both ends of the cylindrical structure in a covering manner respectively; the integrated tank body is internally provided with an accommodating cavity for accommodating dieseloil; the side wall of the cylindrical structure is recessed to form a U-shaped groove; the fuel filter is arranged in the U-shaped groove and is connected with the wall of the U-shaped groove; the urea tank comprises a tank body and a filling port, and is arranged in the accommodating cavity; the side wall of the cylindrical structure is recessed to form an L-shaped groove; the pipeline valve bodycommunicates with the urea tank; and the pipeline valve body is arranged in the L-shaped groove and is connected with the wall of the L-shaped groove. The integrated diesel tank provided by the invention has a compact and reasonable structure, the leakage of the urea tank is avoided, an original fuel filter bracket and an original urea tank bracket are omitted, the weight and cost of the completevehicle are reduced, the size of the fuel tank is increased, and the convenience of disassembly and maintenance are ensured.

The invention belongs to the field of clinical tools, and particularly relates to a suction tube with a detachable filter element. The suction tube provided by the invention comprises a main pipe body and a filter element; the filter element comprises a filter plate, and filter holes are formed in the filter plate; one end of an elastic supporting foot is installed on the inner plate surface of the filter plate, the other end of the elastic supporting foot forms a foot end and extends towards the inner end of the main pipe body, the three or more sets of elastic supporting feet which are sequentially and evenly distributed around the axis of the filter plate are all located on the same conical surface coaxial with the axis of the filter plate and make axial projection in the axial direction of the filter plate, and when the elastic supporting feet are in the initial non-stress state, the diameter of a circle defined by the foot ends of the elastic supporting feet is larger than the pipe diameter of the main pipe body; the inner wall of the main pipe body is correspondingly provided with clamping grooves or concave pits for the foot ends of the elastic supporting feet to be clamped in. According to the invention, the drainage objects in the suction tube can be rapidly removed, and therefore the non-blocking efficient operation drainage requirement can be continuously met, and an operation can be conducted smoothly.

The utility model discloses a kind of dried filter for laver processing, it is related to drying filter technical field, including main body and replacement mechanism, the inner wall of main body is provided with replacement mechanism, the inner wall of main body is provided with sliding slot, the inner wall of sliding slot is movably connected with sliding block, the inner wall of sliding block is welded with movable frame and is connected with.The utility model can effectively replace the effect of the quick replacement of molecular sieve body by the setting of replacement mechanism, so that the molecular sieve can be replaced in time after blocking, the sliding block is slid forward in the inner wall of sliding slot by electric push rod, the movable frame can be pushed out, then the pull block is pulled outwards, the pull block drives fixed rod, spring and limit block to pull outwards, at the same time, the molecular sieve is pulled upwards, the sliding rail is slid upwards in the inner wall of movable slot by the molecular sieve, so that the molecular sieve body is separated from the inside of fixed frame, thereby effectively guaranteeing the replacement of molecular sieve body.

The utility model belongs to the field of refrigerating devices, particularly relates to a wall-mounted refrigerating device for a refrigeration house, and aims to solve the problems that cold air is exhausted into the refrigeration house through a fan after an existing unit refrigerates, the temperature of the refrigeration house is low, the fan works in the refrigeration house for a long time, the fan is easy to damage, the fan needs to be disassembled and overhauled, and the maintenance cost is high. In order to solve the problems that in the prior art, in the prior art, a fan is generally installed through bolts, consequently, disassembly and assembly are inconvenient, and use of a device is affected, the following scheme is provided that the refrigerating unit comprises a refrigerating unit body and a connecting plate, and a connecting frame is arranged on the front side of the refrigerating unit body; a compressor, a condenser, an expansion valve and an evaporator which are used for refrigerating a refrigeration house are arranged in the refrigerating unit body, and two exhaust fans facilitating rapid spreading of cold air in the refrigeration house are arranged on the front side of the refrigerating unit body, so that the refrigerating unit body is stable in structure and convenient to operate, and the requirements of the refrigeration house for refrigeration and exhaust can be met; and meanwhile, a user can conveniently disassemble, assemble and maintain the exhaust fan.

The invention provides a pull ring unlocking apparatus capable of being repeatedly disassembled and assembled, comprising a main body structure and a matching pull ring; a concave sliding rail is provided on the main body structure, and the sliding rail comprises a locking end and an unlocking end; a groove for locking is provided on the locking end of the sliding rail; the pull ring slides in thesliding rail, the front end of the pulling ring is provided with a curved structure toward the front end of the locking end, and one side of the curved structure is provided with a reed; and the pullring slides to the locking end in the sliding rail, the reed is locked in the groove, the pull ring slides to the unlocking end in the sliding rail, and the reed is removed from the groove and unlocked. According to the pull ring unlocking apparatus capable of being repeatedly disassembled and assembled, the pull ring can be repeatedly disassembled and assembled, other components on modules neednot be disassembled during disassembly, the disassembly and assembly is simple, and the production cost is greatly reduced.

The utility model relates to the technical field of low-carbon buildings, and discloses information acquisition equipment for low-carbon building operation. Comprising a machine case, a connecting plate is fixedly connected to the side wall of the machine case, an air outlet pipe is fixedly connected to the side, away from the connecting plate, of the machine case, a pressurizing pipe is fixedly connected to the inner wall, located on one side of the machine case, of the connecting plate, an air detector is arranged in the pressurizing pipe, and a fixing frame is fixedly connected to the inner wall of the machine case; two fixing blocks are fixedly connected to the interior of the fixing frame, first rotating shafts are rotationally connected to the interiors of the two fixing blocks at the same time, and fan blades are fixedly arranged on the shaft walls of the first rotating shafts in a sleeving mode. Gas exhausted by the building flows into the machine box through the pressurizing pipe, the conveying pressure of the gas is improved through the pressurizing pipe, meanwhile, the content of carbon in the gas is detected through the air detector, and information collection is facilitated.

The invention discloses an agricultural vineyard intelligent automatic picking and conveying device. The agricultural vineyard intelligent automatic picking and conveying device is composed of a grape trellis, a first arch, a second arch, a picking device, a first rack, a conveying device, a rotary belt, a first rotary belt support, a driving rotary wheel, a first motor, a driven rotary wheel, a second rotary belt support and a second rack. The grape trellis is fixed to the soil earth surface, the first arch and the second arch are placed at the two ends of the grape trellis, the middle of the first arch and the middle of the second arch are connected through the first rack and the second rack, the picking device is installed on the first rack, and through holes are formed in the first arch and the second arch to allow the rotary belt to penetrate. The agricultural vineyard intelligent automatic picking and conveying device has the advantages that grapes can be picked and conveyed to the two ends of a vineyard, the automation degree is high, and the labor intensity of a vineyard owner is relieved.

The invention discloses a line maintenance bearing support capable of stable positioning. The bearing support includes an insulating bar working head, an electricity testing head and a telescopic piece. The telescopic piece includes a bottom part cannula, an extension pipe and a positioning lever. A lower end of the extension pipe is connected to a first positioning screw thread head. The first positioning screw thread head is connected to an upper end of the bottom part cannula through screw thread matching. A lower end of the positioning lever is connected to a second positioning screw thread head. The second positioning screw thread head is connected to an upper end of the extension pipe through screw thread matching. A top end of the positioning lever recesses inwardly to constitute apositioning screw hole. The lower ends of the insulating working head and the electricity testing head are both connected to a positioning screw. The bottom part cannula is sleeved thereon with an anti-skid sleeve which is in interference fit with the bottom part cannula. According to the invention, a line maintenance bearing support can ensure extension length through the telescopic piece, and conducts electricity testing and back brake on the ground, so that the line maintenance bearing support is easy to operate and can prevent safety hazards caused by operating workers performing work by climbing the support.

The invention relates to an intelligent breeding and gestation house temperature control system. The system comprises a hot water system, a cold water system and a controller, wherein the controller is connected with an intermediate server through a CAN bus, is connected with a temperature acquisition module which is arranged in the breeding and gestation house, and is connected with a computer terminal and a cloud server through the intermediate server via Internet; the hot water system and the cold water system are connected on a spacing pen plate through pipelines; the spacing pen plate consists of a plurality of hollow galvanized steel pipes or seamless steel tubes, the plurality of galvanized steel pipes or seamless steel tubes are communicated to fill the spacing pen plate with water; the spacing pen plate is connected on a pipeline through a hose which has one end provided with a self-sealed quick coupling; and the self-sealed quick coupling is detachably clamped on the spacingpen plate. The intelligent breeding and gestation house temperature control system has the advantages that the room temperature of the breeding and gestation house can be conveniently adjusted, efficient water supply of the hot water system and the cold water system can be effectively guaranteed, and the environmental temperature in the breeding and gestation house can be shared in real time conveniently.

The utility model discloses a filter assembling structure, which belongs to the field of filters and comprises a bottom shell, a top cover is arranged at the upper end of the bottom shell, a fixed assembling component is arranged on the top cover, and the fixed assembling component is connected with the bottom shell. The U-shaped holes and the positioning protrusions are arranged on the bottom shell, the fixing and assembling assembly is installed on the top cover, the top cover and the bottom shell can be rapidly assembled through the fixing and assembling assembly, it can be guaranteed that the top cover has good stability after being assembled, the use stability of the filter after being assembled is guaranteed, the abutting rods play an abutting and fixing role, and therefore the filter can be conveniently assembled and disassembled. A positioning groove and a positioning protrusion are used in cooperation to play a role in precise positioning, it is guaranteed that the top cover is precisely installed on the bottom shell, the fixed assembling assembly can be rapidly adjusted and loosened, rapid disassembly of the top cover is facilitated, the heat dissipation assembly is arranged on the top cover, the heat dissipation effect of the filter in use is improved, and the service life of the filter is prolonged. And normal use of the filter is ensured.

The invention discloses a real silk soaking trolley which comprises a soaking barrel with an open top surface, a top cover which covers the top surface of the soaking barrel and is openable, an inner barrel which is arranged in the barrel body in a sleeving manner, and moving idler wheels arranged on the bottom surface of the soaking barrel, wherein the top surface of the inner barrel is open, and the bottom surface and the side surface of the inner barrel are mesh screen surfaces; the soaking barrel comprises an upper barrel sleeving the inner barrel and a lower barrel; the bottom surface of the upper barrel is communicated with the lower barrel; the upper barrel is a hollow cylinder; the top surface of the upper barrel is open; a grid plate is arranged on the bottom surface of the upper barrel; the top surface of the lower barrel is an open flat top surface and is matched with the bottom surface of the upper barrel in size; the bottom surface of the lower barrel is an inclined plane; a liquid inlet is formed in the top end of the side wall of the upper barrel and is connected with an input pipe for externally supplying real silk soaking solution; a liquid outlet is formed in the bottom end of the side wall of the lower barrel and is connected with an output pipe for recycling used real silk soaking solution. The real silk soaking trolley can reduce volatilization of soaking solution, transfers flexibly, simply, conveniently, quickly and efficiently, prevents soaking solution from overflowing, improves the working environment, and recycles the used real silk soaking solution to the maximum.

The utility model relates to the technical field of switch cabinets, and discloses a dust removal cleaning type intelligent switch cabinet which comprises an intelligent switch cabinet body, ventilation plates are fixedly connected to the left side and the right side of the intelligent switch cabinet body respectively, two sliding grooves are formed in the left side and the right side of the intelligent switch cabinet body respectively, and mounting frames are slidably connected to the inner sides of the sliding grooves respectively. Rolling wheels are rotatably connected to the middles of the mounting frames, connecting rods are fixedly connected to the opposite sides of the two mounting frames, mounting boxes are fixedly connected to the middles of the connecting rods, mounting blocks are slidably connected to the inner sides of the mounting boxes, dust removal brushes are fixedly connected to the opposite sides of the two mounting blocks, and two hole grooves are formed in the top ends of the mounting blocks. The dust removal device is beneficial to reducing dust accumulation on the surface of the ventilation plate, so that the phenomenon that the ventilation plate is corroded is reduced, meanwhile, the phenomenon that the ventilation plate is blocked is reduced, the ventilation effect of the ventilation plate is maintained, the dust removal brush is convenient to flexibly disassemble and assemble, and replacement and dust removal are convenient.

The invention discloses a connecting structure for a floor drain core and a floor drain body. The connecting structure comprises the floor drain body and the core; the inner wall of the floor drain body is provided with a clamping groove, the outer wall of the core is provided with a plurality of convex blocks which can be connected with the clamping groove in a clamped mode, an isobathic annular groove is adopted as the clamping groove, and upper notches are formed in the positions, corresponding to the convex blocks of the core, of the upper portion of the annular groove; the height of the two ends of each convex block is smaller than that of the middle of the convex block. The connecting structure for the floor drain core and the floor drain body has the advantages that disassembly and assembly are convenient, no influence can be caused to water entry of the floor drain core, and the structure is simple and practical.

The utility model provides a fixing device and a photographic monitor, the fixing device comprises a base, a pressing structure, a fixing structure and an elastic piece, and the base is provided with a mounting groove formed by surrounding of a convex structure; the pressing structure is slidably connected with the base, the pressing structure comprises a pressing part and a limiting part which are connected with each other, a guide hole extending in the first direction is formed in the pressing part, the pressing part is located outside the mounting groove, and the pressing part can drive the limiting part to synchronously move in the first direction; the fixing structure comprises a fixing part and a guiding part which are connected with each other, the fixing part is fixedly connected with the base, the guiding part protrudes out of the fixing part, and the guiding part is arranged in the guiding hole in a penetrating mode; the elastic piece is located in the guide hole and abuts against the hole wall of the guide hole and the guide part. The fixing device has an unlocking state and a locking state, and the photographic monitor comprises a battery provided with a first groove and the fixing device. According to the fixing device, smooth switching between different states can be achieved, and continuous operation of the photographic monitor is guaranteed.