32results about How to "Won't enter" patented technology

The invention relates to the technical field of tire treatment equipment, in particular to a waste tire cracking utilization device which comprises a cracking box, an upper cover is rotatably arranged at the upper end of the cracking box, a locking structure is arranged on the upper cover, and a cracking chamber for cracking waste tires is arranged in the cracking box. A heating mechanism for heating waste tires is arranged on the cracking chamber, an oil collecting tank matched with the heating mechanism is arranged at the lower end of the cracking chamber, a plugging mechanism matched with the oil collecting tank is arranged in the cracking chamber, and an upper cover is fixed by arranging a locking structure. The upper cover and the feed port of the cracking box form a sealing structure to prevent air permeation, and the plugging mechanism is arranged to plug the cracking chamber to form a sealing structure, so that air cannot enter the cracking chamber during reaction, the cracking chamber can be in an anoxic state, and liquid oil, gas and solid carbon black produced by cracking reaction are good in quality. The production efficiency is high.

The utility model discloses a power distribution cabinet with a cable protection structure, relates to the technical field of power distribution equipment, and provides the following scheme for solving the problems proposed in the background technology: the power distribution cabinet comprises a power distribution box, the front surface of the power distribution box is rotatably connected with a cabinet door, and the inner bottom wall of the power distribution box is fixedly connected with a protection assembly; the back surface of the distribution box is provided with a plurality of wire inlet holes, and the right side of the distribution box is fixedly connected with a sealing assembly. According to the utility model, through the arrangement of the protection assembly, during use, a cable can be guided and protected by using the guide sleeve, the internal silica gel sheath can reduce the wear of the cable at the bending part, and meanwhile, the front-back position of the guide sleeve can be changed through the slide block after the adjusting screw rod is rotated; therefore, the cable does not need to be greatly bent when electromechanical devices with different sizes are connected, so that the pressure on the surface of the cable is reduced, and the protection effect on the cable is relatively good.

The utility model discloses a new energy automobile connector with an additional sealing structure, which comprises a connecting wire, one end of the connecting wire is fixedly connected with a mounting seat, a first side plate is welded on the surface of the mounting seat, a bearing is welded on the side surface of the first side plate, a screw rod is welded in the bearing, and an internal thread bushing is sleeved on the surface of the screw rod. A second side plate is welded to one end of the inner threaded sleeve. According to the new energy automobile connector with the additional sealing structure, the mounting base is fixedly connected to one end of the connecting line, the first side plate is welded to the surface of the mounting base, the bearing is welded to the side face of the first side plate, and when the sleeve is moved to a proper position, rotation of the lead screw is stopped; at the moment, the sleeve can provide a limiting effect for the connecting position between the connecting wire and the mounting seat, so that the connecting position between the connecting wire and the mounting seat is not bent, and a protection effect is provided during use.

The utility model belongs to the technical field of instant noodle seasoning bag smashing, and particularly relates to an instant noodle seasoning powder raw material smashing machine with an anti-blocking function, which comprises a processing box and further comprises a fixing plate movably mounted on the surface of the processing box, and screws are mounted in the fixing plate in a penetrating manner. Roll shafts are movably installed at one ends of the fixing plates, motors are movably installed on the surfaces of the roll shafts, oil holes are formed in the tops of the roll shafts in a penetrating mode, the roll shafts can be fixed to the surface of the machining box through the fixing plates and then fixed through screws, and after the fixing plates are fixed, the roll shafts can be driven to rotate by starting the motors. During long-term use, when the roll shaft needs to be oiled, the screws are detached, the fixing plates are taken down, then the connection position of the roll shaft and the motor is oiled conveniently, lubricating oil can lubricate the interior of the roll shaft through the oil holes, the roll shaft can be used in cooperation, oiling work can be facilitated, the roll shaft cannot be clamped after long-term work, and ideal smashing can be achieved.

The utility model relates to the technical field of water tanks, in particular to a water tank with a water leakage alarm function. According to the technical scheme, the water tank comprises a water tank body and a supporting frame fixedly installed in the water tank body, and further comprises a protection box fixedly installed on the outer side of the water tank body, a water storage cavity is formed between the protection box and the water tank body, and a liquid level sensor and a communicating pipe fixedly installed on the water tank body are fixedly installed at the bottom of the water storage cavity; the communicating pipe indicates the height of the water level in the water tank body, an exhaust component is fixedly installed at the top of the communicating pipe, and the exhaust component controls the top of the communicating pipe to be communicated with the outside when the air pressure in the communicating pipe is increased and slowly blocks the communicating pipe. Through the arrangement of the exhaust component, pollutants can be prevented from entering the water tank body through the communicating pipe to pollute the water tank body, and the problem that the water level in the water tank body cannot be accurately reflected in the communicating pipe due to air pressure accumulation in the communicating pipe is avoided.

A kind of waterproof and drainage structure for corrugated steel tunnel support system and its construction method, waterproof and drainage structure, including corrugated steel plate, annular drain pipe, advanced drain pipe, longitudinal drain pipe and the bottom drain of being set along the extension direction of tunnel, the surface of corrugated steel plate is sprayed with waterproof material, annular drain pipe is installed in filled cavity, annular drain pipe is longitudinally communicated with longitudinal drain pipe and advanced drain pipe by tee pipe, annular drain pipe, longitudinal drain pipe and advanced drain pipe are all by from outside to inside sequentially arranged plastic blind ditch, geotextile and water inlet pipe with water inlet hole, construction method is first marked laying position;Annular drain pipe, advanced drain pipe and longitudinal drain pipe are laid and connected;Corrugated steel plate is sprayed with waterproof material, and concrete is poured.The present application constructs new waterproof and drainage structure, prevents blockage, and reasonably improves drainage effect.

The utility model discloses a high pressure water jet flow assisted antimony ore scrubbing device, including support frame upper jet mechanism and lower jet mechanism, support frame: its upper end is equipped with scrubbing shell, upper jet mechanism: it includes mounting bracket, gear no.

This application provides a single-droplet combustion test apparatus, including a first chamber, a second chamber, a heat insulation component, and a drive component. The first chamber encloses a high-temperature region with a first preset temperature for single-droplet combustion. The second chamber encloses a low-temperature region with a second preset temperature for storing the single droplet. The heat insulation component is disposed between the first and second chambers, and its two ends along the single droplet's movement direction are respectively connected to the first and second chambers to isolate most of the temperature transfer between the high-temperature and low-temperature regions. The output end of the drive component is connected to the single droplet, enabling it to drive the single droplet in the low-temperature region through the heat insulation component and move to the high-temperature region. By adopting a scheme of fixing the high-temperature region and moving the single droplet, the influence of the single droplet on the high-temperature field when it is pushed to the high-temperature region is negligible, and the single-droplet combustion test is conducted under the design conditions.

The utility model relates to the technical field of bearing assembly, and discloses an automatic sealing ring mounting device for bearing assembly, which comprises a base, two placing platforms for placing bearings are fixed at the upper end of the base, an overturning component is arranged between the two placing platforms, and an automatic oil injection device and a sealing ring fixing component are arranged above the placing platforms. A conveying device is arranged above the placement platform on the left side, two mounting frames are fixed to the upper end of the base and located between the automatic oil injection device and the sealing ring fixing assembly, a sealing ring placement assembly is arranged at the upper ends of the mounting frames, and a pushing device used for pushing bearings is arranged at the upper end of the base. By arranging the overturning assembly, the sealing ring fixing assembly and the sealing ring placing assembly, sealing rings can be automatically installed on the two faces of the bearing, the problem that an existing installation mode is low in efficiency is solved, it is guaranteed that dust, water and other impurities cannot enter the bearing, and therefore it is guaranteed that the service life of the bearing cannot be affected.

The invention relates to the technical field of sewage treatment, and discloses trestle construction rain sewage recovery treatment equipment which comprises a treatment box, a bearing seat is fixedly connected to the inner wall of the treatment box, a drainage plate is fixedly connected to the outer wall of a shaft rod of the bearing seat, and first meshes are evenly formed in the surface of the upper half section of the drainage plate; second meshes are evenly formed in the surface of the lower half section of the drainage plate, a driving assembly is arranged at the bottom of the drainage plate and comprises a supporting wheel, the supporting wheel can rotate and can increase the inclination angle of the drainage plate during rotation, and a cleaning assembly capable of alternately cleaning the first meshes and the second meshes is arranged at the bottom of the drainage plate. Through the driving assembly and the cleaning assembly, switching of the filtering states of the two meshes is achieved, and solid impurities clamped in the second meshes in the filtering process and impurities blocked on the inner walls of the first meshes after the first meshes play the filtering effect for a period of time can be removed under the effect of the cleaning assembly; sewage can continuously flow in from the water inlet pipe to be treated.

The utility model relates to a highly dustproof and waterproof tail gate switch, which relates to the technical field of automobile control switch manufacture, and comprises a button and a controller, the button is installed on a second shell assembly, the second shell assembly and a first shell assembly are connected through silica gel injection molding, the first shell assembly is fixed on a frame, and the controller is connected with the second shell assembly through silica gel injection molding. An inductive sensor is arranged on one side edge of the shell assembly and is in signal connection with the controller. The button is installed on the second shell assembly, the second shell assembly and the first shell assembly are connected through silica gel injection molding, and the first shell assembly is fixed to the vehicle frame, so that when pressure is applied to the button, the second shell assembly is pushed to move, at the moment, silica gel deforms to a certain degree, and the button is pressed. When the first shell assembly and the second shell assembly are connected through silica gel, it is guaranteed that water and dust cannot enter the first shell assembly and the second shell assembly, and therefore high stability is achieved.

This utility model discloses a multi-layer diversion type rainproof device for the fresh air inlet of an air conditioning unit, relating to the field of air conditioning technology. It includes two side plates, with multiple layered partitions installed between them. Each layered partition is sloped towards the air inlet side. In use, the sloped partitions effectively trap fine water particles, allowing them to flow downwards and exit from the device from the left and right, ensuring that rainwater does not enter the air conditioning unit. Furthermore, the dual-direction air inlet structure, with upper and lower insect-proof net components at each inlet, provides protection against sand, insects, animals, and rain. When rainwater comes into contact with the upper and lower insect-proof net components, most of it is intercepted and does not enter the air conditioning unit. The device is compact, occupies little space, and has high mechanical strength, making it particularly suitable for air conditioning units with large fresh air volumes.

The application discloses a permeation flow meter for determining the exchange amount of coastal groundwater-surface water, and relates to the technical field of measuring instruments.The permeation flow meter comprises a permeation chamber, a water tank joint, an elbow, a hose, a pipe sleeve, a ball valve and a water storage bag.The permeation chamber is composed of a barrel, the barrel top is provided with the water tank joint, the water tank joint is connected with the hose through the elbow, the hose is movably connected with the ball valve, and the ball valve is sealingly connected with the water storage bag through the pipe sleeve.The water storage bag forms an independent sealing unit when the ball valve is closed, and the water storage bag is in communication with the inside of the barrel when the ball valve is opened.The barrel bottom is inserted into the water bottom sediment to form a sealing contact.The present application reduces the water head loss through a large-diameter connecting piece, reduces the deformation resistance by using a thin-walled water storage bag, adapts to the tidal environment by using a flexible hose, and determines the optimal waiting time and the optimal correction coefficient through indoor sand tank simulation experiments, thereby significantly improving the measurement accuracy and the reliability of field work.

The utility model relates to medical instrument technical field discloses a portable constant-temperature nucleic acid amplification detector, including detector, the inner wall sliding connection of detector has the sliding rod, the inner wall sliding connection of sliding rod has the press down rod, the bottom fixed connection of press down rod has control spring, the left side outer wall fixed connection of press down rod has the triangular block, both sides fixed connection of sliding rod have the sliding board, one end fixed connection of sliding rod has the return spring, the inner wall of sliding rod is opened and has the sliding slot, the inner wall of detector has the fixing device for fixing test tube, the fixing device includes the thread cover, the outer wall screw thread connection of thread cover is in the inner wall of detector. In the utility model, through increase sealing assembly makes when using detector to detect the reagent in, will not make the impurity enter the inner wall of detector, leads to the inaccurate detection result, appears false positive or false negative.

The present application belongs to the technical field of fish intestine production, and particularly relates to a fish intestine automatic filling equipment, which comprises a shell and a filling pipe. The two ends of the shell are respectively a first circular pipe body and a second circular pipe body which are matched with the rear end and the front end gap of the filling pipe. The middle part of the filling pipe is provided with a taper pipe part with a gradually increasing radius from the front end to the rear end. In the present application, the sealing cathode of the sealing assembly is arranged on the outside of the taper pipe part of the filling pipe and has a sufficient gap with the taper pipe part. Therefore, the condensed water formed on the surface of the taper pipe part of the filling pipe flows along the water guide groove parallel to the generatrix on the lower side of the taper pipe part to the rear end of the filling pipe and drops into the second throttling drain port at the bottom of the shell to be slowly discharged by gravity, so that the condensed water formed on the surface of the taper pipe part cannot reach the sealing cathode to affect the sealing and connection of the film strip into a cylinder.

This invention relates to the field of white oil recovery technology and proposes a white oil recovery device, including a housing, rotating discs, auxiliary rollers, a white oil adsorption section, a rotating section, a pipeline assembly, an oil suction component, and an adsorption and cleaning section. The housing has an outlet and an inlet at its front and rear ends, respectively. Two rotating discs are symmetrically arranged through the housing at both ends and rotate in coordination with it. Two auxiliary rollers are symmetrically arranged at the inlet of the housing. The white oil adsorption section is installed between the rotating discs, and the rotating section is located at one end of the housing. The pipeline assembly is installed at the end of the white oil adsorption section away from the rotating section. The oil suction component includes an oil suction section and a buffer section. The oil suction section is installed on the pipeline assembly, and the buffer section is installed inside the oil suction section. The adsorption and cleaning section is installed through the rotating disc near the rotating section. This technical solution solves the problems of inconvenient white oil recovery and low recovery efficiency in existing technologies.

The utility model relates to the technical field of communication engineering, in particular to a sealing waterproof protection device for a base station antenna phase shifter module. The utility model provides a sealing waterproof protection device for a base station antenna phase shifter module, which comprises a base, a support frame, a placement box and the like, the upper side of the base is connected with the support frame, and the support frame is connected with the placement box. Through the design of a rain baffle, rainwater can be effectively shielded, and the situation that the rainwater directly sprays the containing box is avoided; through the arrangement of the sealing strip and the sealing ring, the sealing strip is used at the contact surface of the lead frame and can effectively prevent rainwater from permeating from gaps, and the sealing ring is used at the joint between the lead frame at the front side and the support frame, so that additional sealing protection is provided, and the rainwater is ensured not to enter the lead frame from the interfaces; the moisture-proof bag is placed in the placing frame, moisture possibly entering the box body can be absorbed, the internal environment is kept dry, and therefore the phase shifter module is effectively prevented from being affected with damp and damaged.

The invention relates to a sand control screen pipe, a method for machining the sand control screen pipe, a roller die and an extrusion die, the sand control screen pipe comprises a base pipe and a filter sleeve, the two ends of the filter sleeve are compacted on the base pipe through mechanical extrusion closing, the two ends of the filter sleeve are fixedly connected with the base pipe, and the filter sleeve sequentially comprises an outer protective sleeve, a filter layer and an inner protective sleeve from outside to inside; the filter layer is of an annular structure formed by winding at least one layer of metal wire woven mesh on the inner protective sleeve, and the filter layer is compacted by the outer protective sleeve and the inner protective sleeve through mechanical extrusion. According to the invention, the purpose of tight contact of the lap joint parts of the filter layer in the circumferential direction is realized by adopting mechanical compaction, so that the purpose of sand prevention and sealing in the circumferential direction is realized; the purpose that the two ends of the filter sleeve are tightly attached to the base pipe is achieved through mechanical extrusion, and therefore the purpose of sand prevention and sealing of the ends is achieved. Therefore, the sand prevention integrity of the filter sleeve is guaranteed, and compared with the prior art, irreversible mechanical damage caused by welding to the metal wire woven mesh is avoided.

The utility model relates to electronic atomization technical field, specifically disclose an atomization device, include: casing, be equipped with liquid storage cavity, atomization air channel and detection air channel in casing, liquid storage cavity is connected with atomization air channel, and detection air channel is connected with atomization air channel, and airflow sensor, airflow sensor sets up in casing, and airflow sensor sets up in detection air channel, wherein, atomization device is in storage and transportation state, and the up and down direction is parallel with vertical direction, in the up and down direction, the position of airflow sensor in casing is higher than the bottom of liquid storage cavity. Make atomization device in warehousing, transportation, use process, airflow sensor is always in the position above the bottom of liquid storage cavity, if liquid leakage or condensate is produced when sucking occurs in liquid storage cavity, and liquid leakage and condensate flow according to gravity downwards, will not flow to the airflow sensor located above, can guarantee that liquid leakage will not enter airflow sensor, will not damage airflow sensor, and will not cause airflow sensor false start.

The utility model discloses cleaning equipment. The cleaning equipment comprises a cleaning machine body and a cleaning seat body, the cleaning machine body comprises a cleaning machine body and a rolling brush assembly. The cleaning seat body comprises a cleaning base and a water containing groove formed in the cleaning base and used for storing cleaning liquid. The rolling brush assembly comprises a rolling brush body connected to the cleaning machine body and a rolling brush rotationally arranged at the front end of the rolling brush body, the rolling brush body is obliquely arranged on the cleaning base, the rear end of the rolling brush body is higher than the front end of the rolling brush body, and at least one part of the rolling brush is located in the water containing groove. The rolling brush body is obliquely arranged on the cleaning base, the angle between the rolling brush body and the cleaning base is adjusted, even if the capacity of the cleaning liquid in the water containing groove is increased, the cleaning liquid in the water containing groove cannot enter the rolling brush body when overflowing, and due to the fact that the rolling brush body is obliquely arranged, the cleaning liquid in the water containing groove cannot enter the rolling brush body. The rolling brush can be soaked in the cleaning liquid in the water containing groove to a greater extent, the cleaning effect is improved, and meanwhile the cleaning liquid cannot enter the rolling brush body.

A traction machine utilizing a traction wheel to dissipate heat relates to the traction machine technology and comprises a permanent magnet synchronous traction machine shell, a stator, a rotor, a rotating shaft and the traction wheel, the traction wheel is fixed on the rotating shaft penetrating out of the permanent magnet synchronous traction machine shell and comprises a supporting sleeve, an outer ring and a plurality of fan blades, and a rope groove is formed in the outer circle surface of the outer ring. The fan blades are evenly distributed around the axis of the rotating shaft and connected between the supporting sleeve and the outer ring, the included angle between the fanning face of each fan blade and the axis of the rotating shaft is an acute angle, wide gaps are formed between the traction wheel and the end face, facing the traction wheel, of the permanent magnet synchronous traction machine shell, and ventilation channels are formed between the fan blades and the wide gaps. Compared with the prior art, the permanent magnet synchronous traction machine has the advantages that the heat dissipation performance is good, the traction wheel is convenient to replace, and the permanent magnet synchronous traction machine can be efficiently cooled without dust entering the traction machine.

This utility model discloses a mandrel workpiece forming waste chip cleaning device, applied in the field of waste chip cleaning equipment technology. It includes a frame with multiple equidistantly arranged semi-circular storage seats inside. Each semi-circular storage seat has multiple symmetrically arranged permeation holes. By designing semi-circular storage seats inside the frame, this utility model pushes the cleaning device to the top of the cutting fluid tank. When the chip-laden cutting fluid discharged from the machine tool drain flows into the pre-cutting fluid tank, and then is filtered by this device before flowing into the main cutting fluid tank, it passes through a guide plate and enters the semi-circular storage seats. The cutting fluid carrying waste chips falls into the semi-circular storage seats. As the amount of cutting fluid increases, the water level inside the semi-circular storage seats rises, and the fluid flows out through the permeation holes into the cutting fluid tank, leaving waste chips in the semi-circular storage seats. This ensures that no waste chips enter the cutting fluid tank, facilitating subsequent cutting fluid recycling.

This utility model relates to the field of food storage technology and discloses a moisture-proof egg storage box, including a box body. A storage mechanism is fixedly connected inside the box body. A sealing plate is fixedly connected to the bottom of the inner wall of the box body. An adjustment mechanism is fixedly connected to the bottom of the sealing plate for adjusting the height of the entire box. The storage mechanism includes a fixed column. The left side of the fixed column is fixedly connected to the left side of the inner wall of the box body, and the right side of the fixed column is fixedly connected to an inner box. Multiple support plates are fixedly connected to the inner walls of the inner box. In this utility model, eggs are placed on top of the support plates. Multiple support plates are used for layered storage inside the inner box. The bottom sealing plate closes with the box door to form a sealed space. When there is moisture inside, a heating element is activated to heat the outer wall of the inner box, allowing heat to remain in the space and evaporate the internal moisture, preventing dampness.

The utility model relates to the technical field of lamp tube mounting frames, in particular to a waterproof protection type double-lamp-tube mounting frame which comprises a main frame, lamp holders are arranged on the two sides of the top end of the main frame, the section of the main frame is in an oval shape, a protection cover is movably clamped to the top end of the main frame, the main frame is hollow, and the lamp holders are arranged on the main frame. A cover plate is movably clamped to the bottom end of the main frame, and waterproof sealing structures are arranged between the main frame and the protective cover and between the main frame and the cover plate. The cross section of the main frame is oval, the top end of the main frame is clamped with the protective cover, and an oval symmetrical structure device is installed and accurately clamped, so that the assembling efficiency is improved, the protective cover can prevent the lamp tube from shifting or being damaged due to external force collision, and the bottom end of the main frame is movably clamped with the cover plate, so that the lamp tube is prevented from being damaged. And waterproof sealing structures are arranged between the main frame and the protective cover and between the main frame and the cover plate, so that rainwater and dust can be effectively prevented from intruding into lamp tube joints, and the device can still keep stable performance in severe environments such as high temperature and high humidity.

The application discloses an ancient-style building ridge waterproof structure and a waterproof method thereof, which comprises a crossbeam assembly, beam laying assemblies fixedly connected on both sides of the crossbeam assembly, waterproof plates fixedly connected on the top of the beam laying assemblies, tile block assemblies arranged on the top of the waterproof plates, triangular water guide blocks fixedly connected on the top of the crossbeam assembly, layered vertical strips fixedly connected on the inner side of the tile block assemblies, water draining grooves arranged on the outer side of the top of the beam laying assemblies, water leaking holes arranged on the top of the water draining grooves, water blocking strips fixedly connected on the front and back of the beam laying assemblies, and structures for drying the beam laying assemblies fixedly connected on the top of both sides of the crossbeam assembly. The ancient-style building ridge changes the traditional poor waterproof performance, adopts various waterproof and water draining structures, so that water flow cannot enter the inner layer of the tiles, the indoor roof cannot be damp, and the accommodation environment of the indoor residents cannot be affected.

The application discloses the technical field of environmental remediation and relates to an in-situ chemical treatment device and method for soil and underground water remediation, which comprises a mixing device, conveying equipment and a support, the support is provided with a mounting plate and a driving piece for driving the mounting plate to ascend and descend, the mounting plate is provided with an injection assembly, the injection assembly comprises an injection head in communication with the conveying equipment and two cover bodies for covering the bottom end of the injection head, the injection head is provided with a driving assembly for driving the cover bodies to move, the bottom end of the injection head is covered by the two cover bodies, the outlet of the injection head is separated from the outside world, the soil cannot enter the inside of the injection head when the injection head is inserted into the soil, the injection head is prevented from being blocked, and the remediation efficiency is ensured.

The utility model relates to the technical field of communication control boxes, in particular to an outdoor multifunctional communication control box which comprises a box body, a dustproof net is arranged on the outer walls of the two sides of the box body respectively, two fixing frames are fixedly connected to the outer walls of the two sides of the box body respectively, a motor is fixedly connected to the outer wall of one side of each fixing frame, and a plurality of gears are connected to the inner walls of the fixing frames. A first movable plate is movably connected to one side of the outer wall of the fixing frame, a first sealing block is fixedly connected to the outer wall of one side of the lower end of the first movable plate, a clamping block is fixedly connected to one side of the lower end of the first sealing block, and a second sealing block is fixedly connected to the lower end of the first movable plate. Clamping grooves are formed in the outer walls of the upper ends of the second movable plates. According to the utility model, the problems that the failure rate of equipment in an extreme environment is obviously increased and the maintenance cost is forcibly increased due to the adoption of a fixed sealing structure and the combination of a passive ventilation hole and a simple fan in the conventional communication control box are solved.

The utility model discloses a high-strength concrete prefabricated component, which relates to the technical field of concrete components and comprises a first component, a second component and a waterproof component, the first component comprises a first prefabricated block and a connecting block, the connecting block is fixedly connected to one end of the first prefabricated block, and the second component is arranged at one end of the first component. The first assembly comprises a connecting block and a mounting plate, the second assembly comprises a fixing lug and a rotating plate, the rotating plate is movably connected in the fixing lug, the waterproof assembly is arranged in the first assembly and the second assembly, the waterproof assembly comprises a clamping groove and a water guide plate, and the water guide plate is fixedly mounted in the clamping groove. When the first precast block and the second precast block are connected, the rotating plate is pressed downwards through the connecting block, so that the rotating plate turns over around the connecting rotating shaft, the first precast block is limited, then the embedded steel bars are connected through the connecting sleeve, the first precast block and the second precast block are connected, operation is easy and fast, and the mounting efficiency is improved.