48results about How to "Maximize contact area" patented technology

The present invention relates to the technical field of the production of high and low voltage distribution cabinets, and specifically relates to a crimping device for wiring terminals of high and low voltage distribution cabinets, which includes a base. An inverted U-shaped bracket is fixedly installed on the upper end surface of the base, and a number of operating plates located inside the inverted U-shaped bracket and arranged in a linear array are provided. A crimping mechanism is jointly arranged on the inverted U-shaped bracket and the base. An integrated operation model of positioning, fixing, and crimping is adopted to complete the synchronous crimping operation of multiple wiring terminals. Before crimping, the wiring terminals are double-limited and the cables are clamped and fixed to ensure the stable positions of the wiring terminals and the cables during the crimping process, achieve uniform force application, and ensure that each wiring terminal is correctly and stably crimped. This not only improves the stability of the connection of the wiring terminals and the crimping quality, enhances the electrical performance and mechanical strength, but also maximizes the contact area to reduce the contact resistance and improve the conduction efficiency, so as to ensure the reliability, safety of the electrical connection and the overall performance of the system.

The utility model provides a positioning device for steel structure installation, which relates to the technical field of steel structure installation machinery and comprises a positioning mechanism, the positioning mechanism comprises a supporting plate, an adjusting mechanism is arranged at the bottom of the supporting plate, sliding blocks are arranged in sliding grooves formed in the two sides of the top of the supporting plate, and reinforcing frames are arranged on the two sides of the supporting plate. The clamping plate is adjusted to a proper position through the installed positioning mechanism, accurate butt joint of the steel beam or the steel plate and the positioning device can be guaranteed, the contact area between the steel beam or the steel plate and the positioning device can be maximized by adjusting the position of the clamping plate, and therefore the butt joint stability and precision are improved, and the butt joint precision is improved. And by adjusting the positions of the clamping plates, a worker can adjust according to the size of a steel beam or a steel plate needing to be in butt joint on site, so that the device can adapt to steel structure materials of different sizes and shapes, and the universality and the applicability of the device are improved.

The utility model discloses an extraction tank for tributylphosphine production, and relates to the technical field of tributylphosphine production. The extraction tank comprises a protective shell, the bottom of an inner cavity of the protective shell is fixedly connected with an extraction tank body, and the top of the protective shell is fixedly connected with a protective top; an air inlet assembly is arranged in the protective shell and comprises a containing box, the containing box is fixed to the tops of the two sides of the inner wall of the protective shell, the top of the protective shell communicates with an air inlet pipe, and a first one-way valve is arranged at the top of the surface of the air inlet pipe. The work of the motor can drive the rotating rod to rotate so as to drive the first bevel gear to rotate, so that the second bevel gear drives the stirring rod and the stirring blades to rotate, and meanwhile, the rotating rod drives the piston plate to move through the cam, so that nitrogen is added into a reactant; and the stirring rod and the stirring blades are matched, so that nitrogen and reactants can be effectively mixed, and the purposes of increasing the reaction efficiency and protecting the reactants are achieved.

The utility model belongs to the technical field of concrete 3D printing, and relates to a structure for connecting an interlayer interface of a 3D printing test piece, which comprises a first reinforcing piece for connecting the 3D printing test piece, and the 3D printing test piece is formed by laminating at least two layers of 3D printing test piece bodies; the first reinforcing piece penetrates through at least two layers of 3D printing test piece bodies in the stacking direction of the 3D printing test piece bodies; according to the 3D printing test piece disclosed by the utility model, through the first reinforcing piece, interlayer interfaces of multiple layers of 3D printing test pieces can be conveniently connected to form a whole, and the interlayer bonding strength of the 3D printing test pieces is enhanced, so that when the 3D printing test pieces are subjected to external force, the layers are not easy to separate or slide, the stress and the force transfer are continuous at the interlayer interfaces, and the structural reliability of the 3D printing test pieces is improved.

The utility model discloses a radiation refrigeration power measuring device capable of automatically following light. Comprising a light sensor, a groove-shaped bracket, a windproof and moisture-proof protective film, a thermocouple, a sample table, a heat conducting plate, a heating film, a temperature sensor, a connecting block, a connecting rod, a motor, a first transmission wheel, a photosensitive controller, a heating power controller, a radiation refrigeration power display screen, a power supply, a transmission belt, a fixed block, a supporting plate, a second transmission wheel, a rotating shaft, a base and a box body. The radiation heat energy testing device can directly measure the radiation heat energy generated by the radiation refrigeration material, realizes accurate control of the refrigeration process, realizes effective and accurate testing of the radiation refrigeration power, and improves the testing efficiency and the refrigeration effect.

The utility model discloses a tile adhesiveness detection device, which relates to the technical field of tile adhesiveness detection and comprises a supporting structure, the supporting structure comprises a bottom plate, a supporting column is fixedly mounted at the bottom of the bottom plate, a mounting frame is fixedly mounted on one side of the top of the bottom plate, and a detection table is fixedly mounted in the middle of the top of the bottom plate. A detection structure is arranged on the mounting frame, a moving structure is arranged at the top of the bottom plate, a glue spraying structure is arranged at the top end of the fixing frame and comprises a second mounting groove, a gluing structure is arranged on one side of the second mounting groove, and a glue removing structure is arranged at the top of the bottom plate. Glue is sprayed to the detection table through the glue spraying structure, then the sprayed glue is evenly smeared through the glue smearing structure, the glue is evenly distributed on the back face or other surfaces of a ceramic tile, and therefore the bonding quality is improved, the contact area between the glue and the ceramic tile is maximized, and the bonding strength and stability are improved.

The utility model discloses a piezometric tube with a backwashing structure, which comprises a tube body, a washing assembly and a positioning assembly, the tube body comprises a guide tube section and a permeable section which are of an up-down structure, the washing assembly is arranged in the tube body and is provided with a water outlet tube, the positioning assembly comprises a sleeve, a positioning plate and an elastic piece, and the sleeve is connected to the water outlet tube. The sleeve is provided with a sliding way facing the inner wall of the pipe body, the positioning plate is slidably arranged on the sliding way, the elastic piece is arranged between the sleeve and the positioning plate, and the positioning plate keeps making contact with the inner wall of the pipe body under the elastic force of the elastic piece. By means of continuous elastic pressing of the elastic piece on the positioning plate, a constraint structure is formed between the water outlet pipe and the inner wall of the pipe body, the structure can effectively restrain transverse shaking caused by fluid impact in backwashing operation, vibration energy is absorbed through deformation of the elastic piece, and therefore the vibration amplitude and frequency of the washing assembly are reduced, and the washing efficiency is improved. The dynamic load impact of the joint part is obviously reduced, and the stability and durability of the whole structure are enhanced.

The utility model provides a kind of water cooling structure and outer rotor permanent magnet motor, belong to the technical field of motor, wherein outer rotor permanent magnet motor includes outer rotor structure, inner stator structure and two end covers;Water cooling structure includes cooling water channel and inlet and outlet water component;Cooling water channel is arranged in the inside of annular plate in inner stator structure;Inlet and outlet water component is arranged on inner stator structure, and is used to supply and discharge coolant to cooling water channel in circulation;Cooling water channel includes multiple direct current sections and multiple bending sections;Multiple direct current sections circumferential interval distribution in the inside of annular plate in inner stator structure, and the extension direction of direct current section is parallel to the axial direction of inner stator structure;Multiple bending sections are communicated between the end of adjacent two direct current sections, and close to the both ends of annular plate.The utility model passes through the combination of direct current section and bending section, makes coolant constantly flow through the both ends of annular plate, avoids temperature gradient to be generated at the both ends of inner stator structure, improves heat dissipation effect.

The utility model relates to the field of new energy batteries, in particular to an improved water-cooling battery which comprises a battery pack and a water-cooling module, the water-cooling module comprises at least two groups of water-cooling pipes, each water-cooling pipe comprises two groups of positioning sections which are arranged in parallel, and the bottoms of the two positioning sections are connected through a bearing section, so that the water-cooling pipes are arranged in a U shape; the positioning sections of every two adjacent water-cooling pipes are communicated through a connecting section and then inserted into a mounting cavity in the bottom of the battery pack from bottom to top, the positioning sections of the water-cooling pipes are matched to clamp and fix the battery pack, and the bearing sections of the water-cooling pipes bear the battery pack from bottom to top. The water cooling device can synchronously cool the inside and the outside of the battery, and the cooling efficiency is greatly improved.

The invention relates to the technical field of industrial wastewater regeneration treatment, and discloses a phosphoric acid wastewater deep purification device based on an adsorption regeneration structure, the phosphoric acid wastewater deep purification device comprises a placing part, the placing part comprises a tank body, the bottom of the tank body is fixedly provided with a supporting seat, and the bottom of the tank body is fixedly communicated with a communicating pipe; and the other end of the communicating pipe is fixedly communicated with an RO membrane tank. The phosphoric acid wastewater deep purification device based on the adsorption regeneration structure can effectively solve the problems that in the prior art, an adsorbent supporting layer of a traditional wastewater purification device is of a fixed plane structure, the straight surface cannot play an effective role in guiding, retarding or dispersing falling wastewater, and consequently the wastewater cannot be effectively purified under the action of gravitational potential energy. The problem that soluble phosphate is difficult to fully intercept due to the fact that a path with the minimum natural selection resistance vertically falls, the phenomena of vertical direct discharge and short flow easily occur, the wastewater purification path is short, the contact time of wastewater and an adsorbent is short and the utilization rate of the adsorbent is low in the prior art is solved.

The present invention provides a pluggable three-phase smart electric energy meter, including a smart meter body, which is connected by a communication module. A concentrator is installed at the bottom of the smart meter body, and a plurality of installation grooves are arranged on one side of the smart meter body. Fixing devices are arranged inside the plurality of installation grooves. A first positive electrode sheet and a first negative electrode sheet will contact the second negative electrode sheet and the second negative electrode sheet. At this time, a DC motor driving shaft rotates in the positive direction, and a pressing component moves upward. When the first positive electrode sheet contacts the second negative electrode sheet and the second negative electrode sheet contacts the first positive electrode sheet, the pressing component moves downward. At this time, the end of an external cable is fixed by the pressing component. For pulling out the end of the cable, it is only necessary to make the first positive electrode sheet and the first negative electrode sheet contact the second negative electrode sheet and the second negative electrode sheet again. At this time, the cable can be loosened to realize pulling out the end of the cable. The device is convenient for installing and removing the cable end, and has a simple structure and is easy to operate.

The oxygen remover of the biomass power generation boiler comprises an oxygen remover body, the oxygen remover body comprises an oxygen remover head and a water storage tank arranged in communication with each other, an exhaust port, a spraying assembly, a water spraying grate group and a steam inlet pipe are sequentially arranged from top to bottom in the oxygen remover head, the water spraying grate group comprises a first-stage water spraying grate, a second-stage water spraying grate and a third-stage water spraying grate arranged in sequence from top to bottom, the second-stage water spraying grate comprises a base plate, a plurality of second through holes are equidistantly arranged on the base plate, a plurality of flow guide distributors extending upwards are arranged on the base plate, the flow guide distributors are arranged in dislocation with the adjacent second through holes, the lower part of the flow guide distributor is detachably connected with the base plate, and the flow guide distributor has an upwardly inclined flow guide surface. The flow guide surface of the conical spiral flow guide vane is in the shape of a conical spiral, the residence time of water drops or water films to be deoxygenated can be prolonged, the water flow can be forced to rotate along the conical surface through the spiral flow guide surface, a strong centrifugal force field is formed, and the downward flow is facilitated.

The invention discloses an auxiliary rolling device for corrugated pipe outer ring welding, and relates to the technical field of corrugated pipes. The device comprises a machining table, two lower pressing rollers are rotationally installed at the top of the machining table through a support, a U-shaped frame is fixed to the top of the machining table, a hydraulic cylinder is fixed to the top of the U-shaped frame, an upper pressing roller is rotationally installed at the bottom of the telescopic end of the hydraulic cylinder through a support, and a limiting device is arranged between the two lower pressing rollers. Through the arrangement of the limiting device, the two-way screw rod and the threaded block are matched to drive the two through groove rods to clamp and limit the two ends of the corrugated pipe, so that the problems that the position of the corrugated pipe is unstable in the rolling process due to the fact that the end of the corrugated pipe is not limited, and rolling is uneven are solved; and meanwhile, the containing groove blocks can bear the copper rings, the containing groove blocks can effectively stabilize the positions of the copper rings, and it is guaranteed that the copper rings cannot deviate or fall off in the rolling process.

This utility model provides a transformer cooling device for a substation, comprising: a transformer assembly; a coolant tank disposed on and connected to the transformer assembly; a self-cooling circulating radiator disposed on one side of the transformer assembly and connected to the transformer assembly, for receiving coolant to dissipate heat from the transformer assembly; and a fan disposed on one side of the self-cooling circulating radiator, with the projection of the self-cooling circulating radiator toward the grounding end covering the fan, and the fan outputting air energy to the self-cooling circulating radiator. The technical problem solved by this utility model is that in related technologies, the heat dissipation of transformers in substations mainly relies on the temperature of the natural environment and lacks an independent cooling device, which makes it impossible for transformers to effectively dissipate heat in high-temperature natural environments or under heavy system loads.

The present invention relates to the technical field of automobile air-conditioning compressor production, and specifically to a surface cleaning system before spraying of automobile air-conditioning compressor parts, comprising a base, wherein the upper end surface of the base is fixedly mounted with left-right symmetrical support circular plates and a drainage groove located between the left-right symmetrical support circular plates, and the left-right symmetrical support circular plates are commonly provided with a loading mechanism for loading multiple piston rings. The present invention realizes efficient cleaning of multiple piston ring surfaces by using the loading mechanism, the brushing mechanism and the cleaning mechanism in coordination with each other, and adopts an integrated operation model of loading, brushing and cleaning, and at the same time, a limiting and fixing mechanism is provided to ensure that the piston ring maintains the correct position during the cleaning process, and the surface of each piston ring is accurately brushed and rinsed, and at the same time, the piston ring is ensured to be fully and evenly cleaned by synchronously brushing the inner and outer ring walls and side walls of the piston ring and combining brushing and flushing.

The present invention discloses a non-woven fabric paving device and method between the surface layer and the core layer of an OSB board, and relates to the technical field of non-woven fabric paving, comprising a base, wherein a paving mechanism is arranged on the top of the base, wherein the paving mechanism comprises a paving unit, wherein the paving unit is arranged on the top of the base, and wherein the paving unit is used to pave the non-woven fabric body, wherein the paving mechanism further comprises a gluing unit, wherein the gluing unit is arranged on the top of the base, and wherein the gluing unit is used to gluing the surface of the non-woven fabric body, wherein a winding mechanism is arranged on the top of the base, wherein the non-woven fabric paving device between the surface layer and the core layer of an OSB board pre-positions the surface layer board and the core layer board by arranging the paving unit, thereby providing a basis for subsequent non-woven fabric interlayer and cutting operations, wherein the glue-coated non-woven fabric is moved between the surface layer board and the core layer board by the power of winding, thereby facilitating the cutting by the tool, maximizing the use of the non-woven fabric body, and reducing waste and loss.

The utility model discloses an adjustable osteotomy and bone grafting fusion cage, which belongs to the technical field of medical instruments, and comprises a container frame capable of implanting bone grafts, the container frame comprises an upper plate layer, a hinge piece and a lower plate layer, the side surface between the upper plate layer and the lower plate layer is of a net structure, the lower plate layer is a solid plane, the upper plate layer is a rectangular hollow plane, and the hinge piece is arranged on the lower plate layer. A bone graft is placed in the container frame through the upper plate layer; the opening and closing angle of the fusion cage can be accurately adjusted according to the size of an osteotomy gap through the hinge piece, so that high individuation for different patients and operation requirements is achieved, meanwhile, a net-shaped structure is designed on the side face of the fusion cage, the requirement for adjusting the opening and closing angle can be met, bone grafts can be prevented from leaking out of the side face, and the fusion cage is convenient to use. In order to maximize the bone grafting efficiency and the contact area so as to promote bone healing, unique developing marks are further designed, the marks are clearly visible in X-rays, it is ensured that a surgeon can monitor the position and state of the fusion cage in real time, then the bone grafting process is accurately controlled, and potential complications are avoided.

An exemplary embodiment of the present invention provides a method of manufacturing a secondary battery, the method including: manufacturing a jelly-roll electrode assembly by winding a first electrode, a second electrode, and a separator together; attaching a tape to cover an outermost edge portion of the electrode assembly; accommodating the electrode assembly in a battery casing opened at an upper side thereof; and removing the tape attached to the electrode assembly from the electrode assembly. The tape includes a first portion attached to the electrode assembly, and a second portion extending in an upward direction of the electrode assembly from the first portion. In the removing of the tape, the tape is removed by pulling the second portion.

The invention belongs to the field of building construction technology, in particular to a large-span gymnasium steel structure roof and a construction method, comprising a roof, a lower steel structure and a plurality of support components installed between the roof and the lower steel structure for temporarily supporting the roof, wherein a main support frame is fixedly installed on the top of the lower steel structure, and the plurality of support components are slidably arranged on a plurality of main tracks for supporting the roof; the four corners of the rectangular frame in the support component are fixedly connected with a rectangular frame, and an adjustment component for adjusting the inclination angle of the support top plate is arranged inside the rectangular frame; a support block is fixedly connected with the bottom of the rectangular frame, and a sliding component for facilitating the translation of the support top plate is arranged inside the support block; anti-drift components for preventing the device from shifting are arranged on both sides of the support block; the problem that the existing steel structure roof support system does not have the function of adjusting the support angle according to the position or arch shape of the arch beam, resulting in poor support stability for the arch beam of the steel structure roof, affecting the construction efficiency and the construction progress is solved.

The utility model discloses a kind of high-temperature-resistant multicolor cloth film, including base layer, color layer and protective layer, the base layer is made of high-temperature-resistant polymer material, the upper surface of the base layer is provided with color layer, the color layer includes high-temperature-resistant pigment and heat stabilizer, the upper surface of the color layer is provided with protective layer, the protective layer is made of transparent high-temperature-resistant material, the top of the color layer is provided with groove, the bottom of the protective layer is provided with grain protrusion, the grain protrusion is arranged in the inside of groove, by the setting of groove and grain protrusion, when film material is subjected to external force such as stretching or bending, the structure of protrusion embedding groove can prevent color layer and protective layer from relative displacement, avoid the delamination, peeling problem caused by insufficient interface adhesion of traditional coating, after protrusion embedding groove, the contact area of color layer and protective layer is maximized, compared with smooth interface, the bonding strength of this structure is higher.

The utility model relates to the technical field of polishing, in particular to a magnet type polishing clamp which comprises a supporting frame and a plurality of connecting rods arranged at the lower end of the supporting frame, connecting sleeves are connected to the lower ends of the connecting rods in an inserted mode, strong magnetic blocks are arranged between the connecting sleeves and the connecting rods, and the strong magnetic blocks are connected with the supporting frame in an inserted mode. A connector is arranged on the lower end face of the connecting rod, the connector is connected with the strong magnetic block in a magnetic attraction mode, the strong magnetic block is connected with the interior of the connecting sleeve in a magnetic attraction mode, the connector is inserted into the connecting sleeve, a screw tap body is arranged below the connecting sleeve, the screw tap body is inserted into the connecting sleeve, and the connecting sleeve is connected with the connector. The screw tap body is connected with the lower surface of the strong magnetic block in a magnetic attraction mode. Based on the magnetic attraction effect of the strong magnetic block, the connector, the strong magnetic block, the connecting sleeve and the screw tap body can be connected in a positioning mode, the screw tap body and the connecting sleeve can be adjusted and replaced conveniently, and the replacement convenience of the screw tap body and the connecting sleeve is improved.

A dual-mode photocatalytic reactor based on the biomimetic structure of *Hylocereus undatus* is disclosed, relating to the field of industrial waste gas purification technology. The reaction unit mimics the spherical multicellular aggregate structure of *Hylocereus undatus*, which efficiently utilizes light energy and promotes material exchange. This constructs a novel device that can simultaneously enhance light energy capture, optimize the reaction flow field, and achieve modular maintenance, thereby improving energy utilization efficiency, mass transfer performance, and ease of operation.

The utility model belongs to the technical field of pipeline lines, and particularly discloses a pipeline positioning device which comprises a base, a sliding groove is formed in the outer surface of the base, the inner wall of the sliding groove is in sliding connection with a shifting frame through a driving mechanism, a positioning table is fixedly installed on the top of the shifting frame, a pipe containing groove is formed in the bottom of the inner wall of the positioning table, and the pipe containing groove is in sliding connection with the sliding groove. A clamping and fixing mechanism used for stabilizing the pipeline is arranged on the inner side of the positioning table, and the pipe containing groove is designed to be similar to a V shape. According to the pipeline positioning device, through combination of the motor and the lead screw, synchronous displacement of the positioning table can be achieved, so that the positioning position of a pipeline line is adjusted, operation is easier under the pipeline positioning requirements of different depths, different directions or different types due to the flexibility, the working flexibility and adaptability are improved, and the practicability is high. The positioning stability and reliability of the pipeline are ensured, and the pipeline positioning requirements under different conditions are better met.

This invention discloses a nickel-iron powder grinding and preparation apparatus, comprising a base on which a conveying system, a grinding system, and a dust collection system are mounted. The conveying system includes a hopper and a belt conveyor. The grinding system includes a weighing bin, a feed pipe assembly, a grinding assembly, a transmission device, and a cooling pipe assembly. The dust collection system includes a fan assembly, a centrifugal dust collector, and a bag filter dust collector. This invention enables highly efficient grinding of nickel-iron alloys.

This invention belongs to the field of solid-state battery technology, specifically relating to a solid-state lithium metal battery and its fabrication method. This invention achieves a structure that evolves from simple stacking to three-dimensional fusion by casting a composite solid electrolyte into a 3D-printed cathode framework. This integrated fabrication process utilizes the fluidity and capillary action of the precursor solution to achieve full wetting and filling at the microscale, forming a stable three-dimensional interconnected network structure after solidification. This structure not only maximizes the contact area and minimizes the interfacial impedance but also constructs an ideal continuous ion / electron transport channel: the cathode framework provides a continuous electron conduction path, while the composite electrolyte running through it provides a continuous ion conduction path. This unique continuous structure ensures that the electrochemical reaction proceeds efficiently and uniformly in three-dimensional space, ultimately achieving a synergistic improvement in high energy density, high power density, and ultra-long cycle life, providing a new technical path for the development of high-performance solid-state batteries.

The utility model relates to food processing technical field discloses an upper exhaust pressure type spray drying tower, including base, the base top fixedly connected with support frame, support frame inner wall fixedly connected with drying tower, drying tower inner wall bottom fixedly connected with fluidized bed, the base top left side fixedly connected with high pressure pump, input end links feed pipe, and the output end is connected atomizing nozzle through the feed pipe, right side has air heater, connects the air pipe, and drying tower outer wall near top passes through fixed ring and links cyclone separator. Through high pressure pump, material is transported to the atomizing nozzle in the middle of drying tower inner wall through feed pipe, and material can be fully atomized into fine droplets, and the hot air that enters from air heater through air pipe forms efficient convection contact, and this central atomization design cooperates the upper exhaust structure, makes the contact area of hot air and material droplet maximization, and heat exchange is more fully, and drying time is shortened significantly, and the material processing capacity in unit time is improved.

The application relates to the technical field of waste gas treatment, and discloses a VOCs waste gas treatment device and method for memory strip processing, wherein the VOCs waste gas treatment device for memory strip processing comprises a purification tower, an input pipe arranged below the outer side of the purification tower, a clean input pipe arranged above the outer side of the purification tower, a clean output pipe arranged at the bottom of the purification tower, an adsorption assembly arranged in the purification tower, and a cleaning auxiliary assembly. The VOCs waste gas treatment device for memory strip processing is provided with the cleaning auxiliary assembly, hot air flows through the air vent first during desorption, then passes through the activated carbon plate, impurities adsorbed previously are purified, meanwhile, the open air vent slides on the surface of the activated carbon plate in sequence, full coverage of the activated carbon plate is realized, the hot air can uniformly flow through each part of the activated carbon plate, full desorption is realized, and the hot air is prevented from preferentially flowing through the part with smoother flow, so that the desorption effect of the part with serious blockage is reduced.

This utility model discloses a replaceable sacrificial anode device, including a mounting frame and two lead blocks. Each lead block is connected to an external wiring connection. A groove is provided in the center of each lead block, the cross-section of which is the same as the cross-section of the sacrificial anode block. One lead block is fixedly connected to the mounting frame, while a shrinkage assembly is provided between the other lead block and the mounting frame. The shrinkage assembly includes a sleeve and a connecting rod. The lead block moves by the movable engagement of the sleeve and the connecting rod, enabling rapid insertion of the sacrificial anode block. Furthermore, the groove cross-section of the lead block matches the anode block, maximizing the contact area and ensuring stable conductivity. Simultaneously, the compression of the return spring can be released by unscrewing a bolt, pushing the movable lead block to ensure contact between the lead block and the sacrificial anode block, maintaining pressure on the sacrificial anode block, and ensuring stable contact resistance.

The utility model discloses a PVC pipe outer wall cleaning device, including work table, the top surface middle symmetry of work table is provided with spraying device, the top surface symmetry of work table is provided with recess, the inside fixed mounting of recess has electric push rod, the top surface fixed connection of electric push rod has support plate, the top surface fixed mounting of fixed plate is located the above spraying device, the top surface middle fixed mounting of fixed plate has the cylinder, the one side surface fixed connection of cylinder output end through fixed plate has cleaning piece, still include: the top surface both sides symmetry of work table is provided with turnover subassembly, through setting up clamping subassembly, so that can to the pipe of different size clamping, set up turnover subassembly simultaneously, so that can to the pipe of clamping overturn, thereby can to the different face of pipe clean, thereby improve the cleaning efficiency of pipe to a certain extent.

The present application belongs to the technical field of bridge engineering support height adjustment, and relates to a stepped automatic height adjustment support height engagement adjustment and multi-step adjustment method, which comprises the following steps: lifting a fixed stepped block to a preset height, wherein the preset height is greater than a target height by no more than a stepped height; keeping the lifting state of the fixed stepped block, and driving a movable stepped block to move horizontally to abut against the vertical surface of the fixed stepped block; keeping the position of the movable stepped block, and releasing the lifting of the fixed stepped block, so that the fixed stepped block falls and sits on the movable stepped block. Through the cooperation logic of the vertical preset height and the horizontal abutment, the present application reduces the vertical lifting displacement control precision requirement, and the fixed stepped block and the movable stepped block always remain in a close engagement state after the height adjustment is completed, so as to ensure that the tooth force transmission area is maximized, and the present application is suitable for the height adjustment scene of the change of the bridge girder or the pier top elevation.