131results about How to "Improve waterproof sealing performance" patented technology

The invention discloses a body dryer which comprises a shell, a first circuit board and two air channels are connected in the shell, the air channels are located on the side face of the first circuit board, air inlets are formed in the front end and the rear end of the shell, the two air inlets are communicated with one ends of the two air channels respectively, two assembly openings matched with the other ends of the two air channels respectively are formed in the shell, and the two assembly openings are communicated with the first circuit board. The two assembly ports are located at the two ends of the same side wall of the shell respectively, the other end of the air channel is connected with the corresponding assembly port in a sealed mode and provided with a plurality of air outlets, and a filter, a motor, a main control board and a heater are connected into the air channel and sequentially distributed from the end, communicated with the air inlet, of the air channel to the other end of the air channel. The main control board is electrically connected with the motor, the heater and the first circuit board, and a touch panel and a power line which are electrically connected with the first circuit board are arranged outside the shell. The drying device has the beneficial effects that the drying speed is increased while the air volume is increased.

The utility model relates to the technical field of sunlight rooms, in particular to a movable sunlight room. The movable sunlight room comprises a track and two sets of telescopic arch assemblies oppositely arranged at the two ends of the track. For any telescopic arch-shaped assembly, the telescopic arch-shaped assembly comprises a fixed arch-shaped unit and a movable arch-shaped unit, the fixed arch-shaped unit is fixedly arranged at the end of the track, and the movable arch-shaped unit is arranged outside the fixed arch-shaped unit in a sleeving mode and is in sliding connection with the track; the two movable arch units can slide oppositely along the track until the opposite ends of the two movable arch units abut against each other, and the other ends of the two movable arch units are connected with the corresponding fixed arch units in an adjacent mode respectively. A'side wall + top 'omnibearing ventilation mode can be provided, so that the permeability of the sunlight room is improved.

The utility model relates to a waterproof sealing type electric connector which comprises a socket, a jack is formed in the socket, and a waterproof cover plate used for covering the opening face of the jack is rotationally arranged on the outer side wall of the socket. A mounting seat located outside the jack is integrally formed on the socket, the waterproof cover plate is rotatably arranged on the mounting seat located on one side of the jack, and a first torsional spring sleeves a rotating shaft of the waterproof cover plate; a locking piece is rotationally arranged on the mounting seat on the other side of the socket, and a second torsional spring sleeves a rotating shaft of the locking piece; and when the waterproof cover plate covers the opening surface of the socket under the acting force of the first torsion spring, the locking piece is mutually clamped and fixed with the waterproof cover plate under the acting force of the second torsion spring. The waterproof cover plate has the effect of enhancing the waterproof sealing performance of the waterproof cover plate to the socket.

The invention provides a main shaft structure which comprises a pipeline disc, a rear end seat, a shaft core, a water retaining ring and a rear shaft core end cover, the rear end seat is located on the periphery of at least part of a shaft section of the shaft core, the pipeline disc and the rear end seat are arranged at intervals in the axial direction, and the water retaining ring is further arranged between the pipeline disc and the rear end seat. At least part of the structure of the water retaining ring is located on the periphery of at least part of the structure of the shaft core, the rear shaft core end cover is arranged at the axial upper end of the shaft core, a containing cavity is formed in the upper end of the rear shaft core end cover, a water outlet hole is formed in the water retaining ring, and the water outlet hole is located below the containing cavity and can be communicated with the containing cavity. Water in the containing cavity can be discharged out of the main shaft structure through the water outlet hole. Water can be effectively prevented from entering the motor at the lower end of the spindle structure, the waterproof sealing effect on the motor of the spindle structure is achieved, and the problem that in the prior art, water easily enters the motor of an electric spindle, and potential safety hazards are caused is solved.

The invention relates to a prefabricated reinforced concrete silo and a construction method thereof.A silo body of the silo is provided with a plurality of silo layers formed by mutually assembling and connecting arc-shaped reinforced concrete prefabricated pieces, positioning steel bars are arranged on supports of the silo, and positioning through holes are formed in the reinforced concrete prefabricated pieces; positioning during assembly of the prefabricated pieces is achieved through the positioning steel bars and the positioning through holes which are matched with each other, positioning is simple, convenient and rapid, the bin body assembly efficiency can be effectively improved, the two adjacent barrel layers of the bin body are bonded and fixed through cement mortar, the two adjacent prefabricated pieces of the same barrel layer are matched through concave-convex spigots and locked through locking bolts, and the bin body assembly efficiency can be effectively improved. Every two upper and lower adjacent prefabricated pieces are connected in a sleeve grouting mode, the connecting strength of the prefabricated pieces can be effectively improved, and the structural stability of the silo is improved.

The utility model provides a wire harness connecting assembly, battery pack and electric equipment, the wire harness connecting assembly comprises a connecting shell, a wire harness and a sealing cover, the connecting shell comprises a fixed pipe and a sealing cavity which are connected with each other, one end of the wire harness is connected with a wiring terminal, the wire harness is sleeved in the fixed pipe, the outer side of the wire harness is tightly attached to the inner wall of the fixed pipe, and the sealing cover is arranged in the sealing cavity. The wiring terminals are correspondingly arranged in the sealing cavities; the sealing cover is matched with the sealing cavity and is suitable for sealing the wiring terminal in the sealing cavity; according to the utility model, the wiring terminal is arranged in the sealing cavity and is sealed in the sealing cavity through the sealing cover, so that the waterproof sealing performance of the wiring terminal is improved, and meanwhile, the fixing pipe is tightly sleeved outside the wiring harness, so that the tight connection between the fixing pipe and the wiring harness is realized, the tight connection between the fixing pipe and the wiring harness is ensured, and the sealing performance of the wiring harness is improved; and the stable clamping effect of the fixing pipe on the wire harness is achieved, the wire harness is prevented from shaking or falling off, and the stability and safety of wire harness connection are improved.

The invention discloses a compact thermotank, and relates to the technical field of radar equipment, the compact thermotank comprises a thermotank body, the top of the thermotank body is movably provided with a top cover plate, the bottom of the thermotank body is provided with a temperature adjusting assembly, and the temperature adjusting assembly comprises a protective cover body arranged at the bottom of the thermotank body; the TEC semiconductor chilling plate is arranged in the protective cover body, the hot end part is arranged at the bottom of the TEC semiconductor chilling plate, the cold end part is arranged at the top of the TEC semiconductor chilling plate, and the hot end part and the cold end part are both of an integrated form-relieved tooth structure. The cold end fans are arranged at the top of the cold end part and distributed at intervals, the hot end fans are arranged at the two ends of the hot end part and distributed at intervals, a constant-temperature working environment is provided for the receiver through the temperature adjusting assembly arranged in the constant-temperature box body, the temperature noise of the receiver is reduced, the sensitivity is improved, and the reliability of the receiver is improved. The overall performance of the radar is enhanced, and the radar detection effect is improved.

The utility model discloses a large-diameter shield tunnel composite structure which comprises a prefabricated segmental lining, a prefabricated box culvert located at the bottom is arranged in the prefabricated segmental lining, the two side top faces of the prefabricated box culvert are both connected with locking foot longitudinal connection beams, and arch wall linings are arranged on the two locking foot longitudinal connection beams. A reinforced concrete internal structure which is closed in the circumferential direction and continuous in the longitudinal direction is formed on the inner side of the prefabricated segmental lining, so that the structural longitudinal rigidity, the overall stability and the waterproof effect of the large-diameter shield tunnel are effectively improved; the large-diameter shield tunnel structure can be widely applied to large-diameter shield tunnel engineering built in complex environments such as soft soil unfavorable geology, high water pressure, underwater riverbed erosion and deposition change and high seismic intensity, the overall rigidity, longitudinal stability and waterproof sealing performance of a large-diameter shield tunnel are effectively improved, and meanwhile the large-diameter shield tunnel structure has the advantages of being high in mechanization degree, good in integrity, controllable in construction quality and the like.

The utility model discloses an assembly type precast concrete wallboard which comprises a reinforced concrete wall body, the left side and the right side of the reinforced concrete wall body are respectively provided with a pouring reserved area in a concave mode, and a plurality of layers of butt joint steel bar rings which are respectively of a closed-loop structure are respectively embedded in the left side and the right side of the reinforced concrete wall body. At least part of ring bodies of the butt-joint steel bar rings are exposed out of the reinforced concrete wall body and located in the pouring reserved area; a slurry baffle is formed on the reinforced concrete wall body and located on the outer side portion of the pouring reserved area. According to the utility model, rapid and reliable connection with an adjacent wall body is realized, and the assembly is simple and reliable; due to the fact that the slurry blocking plate is formed on the outer side portion of the pouring reserved area, a scaffold and a packaging formwork do not need to be erected on the outer side of the wall body during pouring operation, and only the formwork is packaged on the inner side of the wall body, in this way, the workload of erecting the scaffold and disassembling the formwork on site is greatly reduced, the construction efficiency is greatly improved, and the construction period is shortened.

The invention discloses a waterproof new energy electric vehicle battery box power conversion connector, and aims to solve the problems that the connection part of the existing electric vehicle power conversion connector is lack of a waterproof facility, the waterproof facility can enter a plug along a terminal, the power transmission is influenced, even a contact point is heated, and the power conversion efficiency is high. And abnormal phenomena such as electric connection failure or burning and the like are caused. The battery box power conversion connector comprises a socket and a plug matched with the socket, and the socket is provided with a male end plug assembly used for being in contact fit with a female end jack assembly of the plug. By arranging the first waterproof sealing ring, the waterproof boss and the second waterproof sealing ring, after the socket and the plug are locked through the fixing assembly, the second waterproof sealing ring on the waterproof boss is in close fit with the inner wall of the mounting groove, and the first waterproof sealing ring on the right side of the connecting column is in close contact with the inner wall of the mounting groove; therefore, the waterproof sealing capability of the connection part is improved, and the damage of the power conversion connector caused by external reasons is effectively avoided.

The utility model relates to the technical field of charging guns, and particularly discloses a waterproof, anti-heating, anti-electric shock and anti-arc structure of a conversion head, which comprises a CCS1 gun head and an NACS interface connected with the CCS1 gun head, a first copper contact pin, a first signal pin and a PCBA circuit board are arranged in the CCS1 gun head, a first button and a second button are arranged on the NACS interface, and a second copper contact pin is arranged on the first button. The inner side of the first button and the inner side of the second button are each provided with a microswitch electrically connected with the PCBA circuit board, a copper bar, a second copper pin and a second signal pin are arranged in the NACS interface, and a waterproof sealing strip is arranged between the CCS1 gun head and the NACS interface. According to the utility model, the first copper pin and the second copper pin are both connected with the copper bar in a pressure riveting manner, the first button and the second button are internally provided with the microswitches, power is cut off before the gun is pulled out, electric arc generation is avoided, the electric arc prevention function is realized, and the electric shock prevention function is realized by arranging the safety door structure at the output end of the CCS1 gun head. The waterproof sealing performance is improved by arranging the waterproof sealing strip, and the waterproof grade is improved.

The utility model discloses a battery cell top cover component and battery module, including top cover and upper insulator, wherein the top cover is equipped with mounting through hole and annular groove, mounting through hole is used for the pole to pass through, annular groove is arranged on the top surface of top cover and is constructed to surround the periphery of mounting through hole; the upper insulating part is provided with a sealing through hole and a fitting end face, the sealing through hole is used for being in sealing fit with the pole, the fitting end face is arranged on the side, facing the top cover, of the upper insulating part and is used for being bonded to the top face of the top cover through structural adhesive, an annular convex part is arranged on the fitting end face, and the annular convex part is constructed to be bonded to the annular groove in a matched mode. According to the battery cell top cover assembly, the waterproof sealing performance between the upper insulating part and the top cover can be greatly improved, and the problem that the battery cell top cover assembly is prone to battery cell sealing failure is solved.

The application discloses a kind of stainless steel gutter side TPO fixed structure, including galvanized support by pin fixed on gutter keel;With the fixed stainless steel gutter socket type fixed folding piece of stainless steel;Roof TPO waterproof roll goods are fixedly connected with socket type fixed folding piece of stainless steel and galvanized support device.The application adopts galvanized support piece, and it has gutter fixing and TPO roll support function, improves the stability of overall structure;The application adopts socket type fixed folding piece of stainless steel and is welded with gutter, to ensure reliable connection, excellent waterproof performance;TPO waterproof roll goods in the application and fixed folding piece are mechanically connected and sealed by glue injection, to enhance wind lifting capacity and waterproof tightness;The structure and process of the application can ensure overall sealing effect even in the case of TPO non-full-paved gutter, to prevent rainwater from pouring into indoor.

The present invention discloses a storage plate, a storage plate combination unit, and a battery swap station or energy storage station. The storage plate includes a protruding end and a matching end arranged at two opposite ends of the storage plate. A protruding cavity is formed in the protruding end and the matching end. The protruding end and the matching end both protrude from the same side surface of the storage plate and extend in the same direction. The matching end is used to match with the protruding end of an adjacent storage plate when multiple storage plates are assembled. The protruding end and the matching end are used to control liquids such as rainwater to be discharged from the storage plate from both ends of the extension direction of the protruding end and the matching end, so as to prevent liquids such as rainwater from penetrating into the interior of the storage plate from the connection between the two storage plates. The instantaneous rainfall needs to at least overflow the highest point of the protruding end or the matching end before it can flow to the connection between the two, thereby enhancing the waterproof effect. The structure of the cavity facilitates the assembly of multiple storage plates. Through the connection and matching of the matching ends of two adjacent storage plates with the protruding ends, the rapid assembly of the battery swap station or energy storage station is realized, the assembly efficiency is accelerated, and the structural strength of the storage plate itself and the connection is improved.

The utility model relates to the technical field of external wall panel waterproof structures, in particular to a waterproof structure of an assembly type external wall panel connecting node, which comprises a first external wall panel, a cast-in-place connecting plate and a second external wall panel which are sequentially arranged from bottom to top, and an overhanging connecting rib is arranged at the top of the first external wall panel and extends into the cast-in-place connecting plate; a connecting groove is formed in the bottom of the second external wall panel, a connecting block is arranged on the top of the cast-in-place connecting plate and embedded into the connecting groove, and a waterproof assembly is arranged between the bottom of the second external wall panel and the top of the cast-in-place connecting plate. The overhanging connecting rib, the connecting block and the waterproof assembly have high use stability, and long-term stable use can be ensured.

The utility model relates to an environment-friendly ecological cofferdam which comprises a plurality of cofferdam plates, the cofferdam plates are connected through bolts, one side of each cofferdam plate is fixedly connected with an inserting strip, the other side of each cofferdam plate is fixedly connected with a U-shaped connecting strip, the inserting strips are matched with the U-shaped connecting strips, and the two sides of the outer wall of each inserting strip are fixedly connected with first sealing gaskets. First connecting holes are uniformly formed in the inserting strip and the first sealing gasket; second connecting holes matched with the first connecting holes are uniformly formed in the U-shaped connecting strip; according to the scheme, when the cofferdam is used, the inserting strips and the U-shaped connecting strips are fixed through bolts from the first connecting holes and the second connecting holes, so that the connecting positions between the adjacent cofferdam plates can be limited, and the sealing performance of connection between the adjacent cofferdam plates can be enhanced through the first sealing gaskets; and a second sealing gasket can enhance the waterproof sealing performance between the bottom of the cofferdam plate and the ground, so that when the environment-friendly ecological cofferdam is used, the water flow interception effect can be enhanced.

This utility model discloses a waterproof and sealed wire and cable connector structure for plant lights, including a wire body and a connector body. The connector body is fixedly connected to the end of the wire body, and a sealing protective sleeve is fixedly installed on the outer wall of the connector body. A sealing rubber sleeve is fixedly connected to the inner wall of one end of the sealing protective sleeve, and a transmission ring is fitted on the outer wall of the other end of the sealing protective sleeve. A sealing ring is movably arranged on the inner wall of the transmission ring, and a sealing ring is adhered to the outer wall of the side of the sealing ring. A support arm is fixedly connected to the lower surface of the sealing protective sleeve below the sealing rubber sleeve, and a positioning frame is movably installed at the lower end of the support arm. A protective mechanism is provided on the inner wall of the end of the positioning frame. This waterproof and sealed wire and cable connector structure for plant lights enhances waterproof sealing, thereby preventing water vapor from corroding the connector and improving the safety and stability of the connector.

The present application relates to the field of foaming glue, and in particular to a polyurethane foaming glue and a preparation method thereof. The polyurethane foaming glue comprises components A and B; the raw materials of component A are 65-85 parts of polyol composition, 2-5 parts of chain extender, 10-20 parts of flame retardant, 10-15 parts of functional particles, 2-5 parts of thixotropic agent, 0.3-1 parts of catalyst, 1.5-3 parts of foam stabilizer, 1-2 parts of deionized water, 0.4-0.8 parts of antioxidant, and 1.5-2.5 parts of auxiliary agent in parts by mass; the raw materials of component B are 45-55 parts of polyisocyanate and 45-55 parts of functional polymer in parts by mass. The polyurethane foaming glue prepared in the present application is halogen-free and phosphorus-free, environmentally friendly and flame-retardant. Through the design of high viscosity and high thixotropy, it effectively meets the industrial needs of gluing on planes and inclined surfaces, greatly improves its water absorption rate, improves waterproof sealing and mechanical property retention rate, and has very excellent application prospects.

The utility model discloses an underwater optical branching optical cable joint box, which comprises a box bottom and a box cover, the box bottom is provided with a cable inlet end and a cable outlet end, the cable inlet end is provided with at least one cable inlet hole, the cable outlet end is provided with at least two cable outlet holes, and at least one optical cable fixing plate corresponding to the cable inlet hole is arranged on the box bottom close to the cable inlet hole. The box bottom is provided with at least two optical cable fixing plates corresponding to the cable outlet holes at positions close to the cable outlet holes, the middle position of the box bottom is provided with a fiber melting disc, the middle position of the fiber melting disc is provided with a miniature branching device, and the miniature branching device is provided with at least one input end and at least two output ends; and the optical cable of the cable outlet hole is connected with the output end of the miniature splitter through fiber fusion. By means of the mode, the optical cable connector can be used for pipeline straight-through and branch connection of various underwater and buried optical cables, has the advantages of being high in sealing waterproof performance and reliability, and has particularly good underwater usability and adaptability.

The utility model provides a waterproof sealing servo turntable control box with high cooling performance, and belongs to the technical field of control boxes. The problem that the sealing performance and the cooling effect of an existing servo turntable control box are difficult to consider at the same time is solved. The control box comprises a control box body, an isolation plate and a cooling structure, the isolation plate is fixedly arranged in the control box body and divides the space in the control box body into a sealing cavity and a cooling cavity, and the isolation plate is made of a heat conduction material; the sealing cavity is used for placing a power supply and electronic devices; the cooling structure comprises a water-cooling heat dissipation pipe and a plurality of fans, the water-cooling heat dissipation pipe is fixedly arranged in the cooling cavity, a plurality of ventilation openings are formed in the two opposite side walls of the cooling cavity, a part of the fans are arranged on one side wall of the cooling cavity, the other part of the fans are arranged on the other side wall of the cooling cavity, and the fans and the ventilation openings are arranged in a one-to-one correspondence mode. The control box not only has good waterproof sealing capability, but also has efficient cooling capability.

The utility model discloses a rotary table shafting part waterproof sealing device which is used for sealing a shafting part of a rotary table, the rotary table comprises an H-shaped support, the upper half portion of the H-shaped support is a first U-shaped frame, the lower half portion of the H-shaped support is a second U-shaped frame, and the rotary table further comprises a bearing cabin arranged in the first U-shaped frame. Pitch shaft systems connected with the first U-shaped frame are arranged on the two sides of the bearing cabin respectively, an azimuth shaft system is arranged on the second U-shaped frame, and the rotary table shaft system waterproof sealing device comprises first waterproof sealing assemblies arranged in the pitch shaft systems respectively and a second waterproof sealing assembly arranged in the azimuth shaft system. According to the waterproof sealing device for the rotary table shafting part, the problem that in the prior art, sealing is conducted only through a labyrinth structure, and the good sealing effect cannot be achieved is solved, and the problems that in the prior art, due to the fact that sealing is conducted through an oil seal, the requirement for shafting machining precision is high, shafting friction resistance is increased, and the sealing effect is poor are solved. And the requirement on the output torque of the motor is increased.

The utility model relates to the technical field of cable installation and laying. The transformer high-low voltage integrated cable box device comprises a main body structure, the main body structure comprises a base, a cabinet body structure, ventilation openings and sealing washers, and the number of the ventilation openings is two; and the protection structure comprises a hinge and a sealing ring, and one end of the hinge is fixedly connected with the outer surface of one side of the cabinet body structure. According to the utility model, through the attachment of the sealing ring and the sealing washer, a gap generated when the cabinet body structure is attached to the protective door can be filled as much as possible, so that the waterproof sealing capability of the protective structure can be improved to a certain extent, external air can enter the waterproof box only through the air inlet, and the opening of the air inlet is vertically downward; therefore, rainwater can be prevented from flowing into the air inlet, and the design can effectively prevent the rainwater from entering the cabinet body structure.

The utility model discloses a through-wall sealing connection structure of a flexible waterproof sleeve. The through-wall sealing connection structure comprises a flange sleeve, a flange gland, a first limiting ring, a second limiting ring and an air bag sealing ring. The flange sleeve is pre-embedded in a building wall, and a first limiting ring and a second limiting ring are fixedly arranged on the inner wall of the flange sleeve respectively and limit radial displacement of a pipe path. When the air bag sealing ring is inflated, the outer ring abuts against the inner wall face of the flange sleeve, the inner ring abuts against the periphery of the pipeline, the front end abuts against the rear end of the flange gland, and the rear end abuts against the front end of the first limiting ring, so that plugging and sealing are conducted. According to the sealing connection structure, the rear end of the flange gland and the front end of the first limiting ring are used for limiting, displacement of the air bag sealing ring is avoided, meanwhile, the air bag sealing ring is deflated when a pipeline is mounted and dismounted, the inner ring of the air bag sealing ring is separated from the pipeline, friction force between the air bag sealing ring and the pipeline is greatly reduced, and the risk of abrasion of the air bag sealing ring is reduced; therefore, the pipeline is convenient to mount and dismount.

The utility model provides a reflective film capable of being embossed to form an edge. The reflective film comprises a film body, the film body is provided with a reflective surface layer, a waterproof layer, a polystyrene foam layer and a bottom glue layer which are laminated from top to bottom; the thickness of the polystyrene foam layer is greater than that of the waterproof layer, and the thickness of the polystyrene foam layer is greater than that of the bottom glue layer; the polystyrene foam layer is configured to be capable of correspondingly forming a whole circle of edge finding structure on the peripheral side of the film body in an overflow form after the reflective film is embossed and formed; the polystyrene foam layer is arranged in the film body, the thickness of the polystyrene foam layer is larger than the thickness of the waterproof layer and the thickness of the bottom glue layer, a continuous and uniform edge finding structure can be formed on the periphery of the reflective film at a time according to the principle that polystyrene foam overflows during imprinting forming, and continuous annular protrusions are formed on the periphery of the edge finding structure, so that the reflective area is enlarged, and the reflective effect is improved. Light rays can be reflected more effectively from the side direction and different angles, and the warning effect is remarkably improved.

The utility model relates to cement pole flange reinforcing technical field, and disclose a kind of conical cement pole flange reinforcing structure, including flange plate one, the bottom side of flange plate one is provided with radial support subassembly, the outside sleeve joint of radial support subassembly has conical cover, the sidewall of radial support subassembly is connected with reinforcement rib subassembly and is penetrated, the bottom end of radial support subassembly is fixedly connected with flange plate two, the upper end of flange plate one the conical cover is welded with welding frame. Through radial support subassembly through vertical passage one, circular buffer ring and vertical passage two form elastic support system, both can pass through rigid channel transmission axial load, and circular buffer ring of rubber material can also be used to absorb radial impact force, reduce stress concentration to the damage of cement pole;Radial rod, oblique rod and annular reinforcement rib in reinforcement rib subassembly constitute three-dimensional rigid network, can effectively disperse axial tension, pressure and torque, improve structure overall deformation resistance.

The invention discloses a gas-liquid mixing device for preparing hydrogen-rich water. The gas-liquid mixing device comprises a shell and a gas-liquid mixing assembly, a gas-liquid inlet and a gas-liquid outlet are formed in the two axial ends of the shell; the gas-liquid mixing assembly is arranged in the shell and comprises a plurality of first gas mixing pieces and second gas mixing pieces which are alternately arranged in a stacked mode in the axial direction of the shell. A self-excitation turbulent flow type flow channel is formed between the adjacent first gas mixing sheet and second gas mixing sheet; the self-excitation turbulent flow type flow channel comprises a main flow channel and an auxiliary flow channel; the plurality of auxiliary runners are arranged beside the main runner, and the two ends of each auxiliary runner are communicated with the main runner; the head end and the tail end of each self-excitation turbulent flow type flow channel are sequentially communicated to form a gas-liquid mixing channel; the inlet end of the gas-liquid mixing channel is communicated with the gas-liquid inlet; and the outlet end of the gas-liquid mixing channel is communicated with the gas-liquid outlet. The hydrogen and water can be fully mixed and dissolved, the mixing efficiency is high, the overall structure is compact, the size is small, and the actual application requirement is effectively met.

The utility model discloses a drainage pipe anti-seepage device for engineering construction, and relates to the technical field of construction drainage pipes, the drainage pipe anti-seepage device comprises an anti-seepage sealing pipe and drainage pipes, one end of each drainage pipe is provided with a sealing supporting assembly, and a sealing material filling pipe can fill sealing materials to the connecting position of the two drainage pipes through a plurality of filling holes in the bottom. Four supporting frames fix arc-shaped blocks in sliding grooves through locking bolts, the practical stability of an upper clamp and a lower clamp is improved, meanwhile, the effect of limiting a sealing material filling pipe is achieved, and the two upper limiting hoops and the two lower limiting hoops move in adjusting grooves in the outer wall of the anti-seepage sealing pipe through moving blocks; the position distance between every two adjacent upper limiting hoops can be adjusted according to the lengths of different drainage pipes, a locking barrel fixes a sealing strip plate to the tops of the two upper limiting hoops through a movable rod, and the effect of sealing and protecting filler holes formed in the top of a supporting frame is achieved.

The utility model belongs to the technical field of dental instruments, and relates to a key structure which comprises at least one key and flexible glue, the key is installed in an installation opening of a shell, the position of the key corresponds to a switch used for controlling on-off of a circuit, and each key is provided with at least one pressing part used for pressing the switch; the soft rubber is arranged between the key and the switch, the soft rubber is provided with an elastic part corresponding to the pressing part, and the elastic part protrudes towards the direction of the key and abuts against the key or is connected with the key; according to the technical scheme provided by the invention, the elastic part has a certain resilience force, so that the feedback experience of the use hand feeling of the key is better, and meanwhile, the flexible glue and the shell as well as the elastic part and the key are tightly connected, so that water is effectively prevented from entering the shell from a gap between the key and the shell, and the service life of the key is prolonged. The waterproof sealing performance is improved, and the switch and the control mainboard are prevented from being damaged by short circuit and static electricity. The utility model further relates to a handheld dental instrument handle comprising the key structure.

This utility model discloses a concrete pipe pile molding mold with a biodegradable release agent, belonging to the field of mold technology. It includes a shell with an upper plate at the top of its outer surface. A rotating wheel is inserted inside the shell, and a knob is installed at the top of the outer surface of the rotating wheel. A connecting block is sleeved inside the outer surface of the rotating wheel. The mold employs a precise temperature control system using heating wires, allowing the curing temperature to be set according to the concrete characteristics. This avoids gas expansion caused by high temperatures, reducing porosity at the source and ensuring a uniform and dense internal structure of the concrete. A vacuum pump at the top of the housing, along with valves and air pipes, actively extracts air from the pipe during concrete pouring, eliminating internal air bubbles and improving concrete density and waterproof sealing performance. Furthermore, the mold's wear-resistant protective layer and heat-insulating buffer layer effectively extend its service life and maintain stable curing temperature, providing a reliable guarantee for the production of high-performance concrete pipe piles.