16results about How to "Maintenance free" patented technology

The invention belongs to the technical field of current transformers, and particularly relates to a current transformer and a production technology thereof.The current transformer comprises a primary winding, the lower end of the primary winding is sleeved with a plurality of secondary windings, an isolation plate is arranged between every two adjacent secondary windings, one end of each isolation plate is fixed to the primary winding, and the other end of each isolation plate is inserted into a groove in the inner side of a shell; epoxy resin is poured in the shell, after the epoxy resin is cured, the lower end of the primary winding and the secondary windings are packaged in the shell, the epoxy resin serves as insulation, and the voltage transformer is suitable for current and electric energy measurement and relay protection in an electric power system with the rated voltage of 66kV and the rated frequency of 50Hz. The oil-free and gas-free SF6 gas insulation device has the advantages of being oil-free, gas-free, flame-retardant, explosion-proof, maintenance-free, high in safety and reliability and the like, is pollution-free to the environment, is a similar product for replacing domestic and external oil insulation and SF6 gas insulation, and is suitable for being used for current and electric energy measurement and relay protection in an electric power system.

The utility model discloses a lifting table driven by a single motor, which comprises a support frame for fixing a table plate, the support frame is connected with the top ends of at least two table legs, and the lifting table further comprises the single motor for driving a screw rod to rotate so as to drive lifting pipes of inner and outer pipes of the table legs to ascend or descend through screw rod nuts; a worm is coaxially fixed to a shaft of a single motor fixed to the top end of a first lifting pipe of the first table leg, a worm gear meshed with the worm and the top end of a first lead screw of the first table leg are limited in the circumferential direction, and a driving chain wheel is coaxially limited to the top end of the first lead screw in the circumferential direction. An annular chain meshed with the driving chain wheel is meshed with a driven chain wheel which is circumferentially limited at the top end of a second screw rod of the second table leg; the worm, the worm gear, the driving chain wheel, the driven chain wheel and part of the annular chain meshed with the chain wheels are all contained in the containing space of the shell; the shell is detachably connected with the top end of the first lifting pipe. The driving structure is relatively simple and compact, relatively saves cost and is convenient to install.

The utility model discloses a structure for prolonging the service life of a pneumatic chute, which is characterized in that a material receiving point ventilation plate is fixed at a material receiving point in a material chamber, a ventilation plate protection device is arranged above the material receiving point ventilation plate, and the ventilation plate protection device comprises a first steel plate and a second steel plate which are hinged through a stainless steel hinge; rubber pads are arranged below the first steel plate, the second steel plate and the stainless steel hinge; vent holes are formed in the surfaces of the first steel plate and the second steel plate; a pneumatic chute cover plate is provided with a through hole, a normal-pressure quick-opening hand hole is welded and mounted on the pneumatic chute cover plate, a sealing gasket is arranged at the normal-pressure quick-opening hand hole, a vent hole is arranged to increase material fluidity and prevent material blockage, and the normal-pressure quick-opening hand hole is used for mounting a pneumatic chute ventilation plate protection device, optimizing lining protection and observing the internal condition of the pneumatic chute. And meanwhile, by additionally arranging the protective device for the ventilation plate of the pneumatic chute, protection of the ventilation plate at the material receiving point of the pneumatic chute is optimized and upgraded, and the risk that the ventilation plate is damaged due to scouring is eliminated.

This utility model discloses a metal-faced sandwich composite integrated panel for shielded rooms, relating to the fields of electromagnetic shielding and building envelope technology. This utility model includes a new integrated panel one for external building shielding and enclosure and a new integrated panel two for internal building shielding, decoration, and sound absorption. New integrated panel one consists of an enclosure layer, a sandwich layer, and a shielding layer; new integrated panel two consists of a shielding layer, a sandwich layer, and an enclosure layer. Through the unique design of new integrated panels one and two, this utility model is suitable for a wide frequency band of 10kHz-50GHz, exhibiting excellent shielding effectiveness, meeting and exceeding the national military standard GJB5792A-2021C level standard, fully meeting the design requirements of anechoic chambers and other types of shielded rooms. New integrated panels one and two are produced and constructed using innovative models and processes, achieving true integrated shielding, resulting in higher construction efficiency, better quality, stronger safety, shorter cycle time, and higher cost-effectiveness.

The invention relates to the technical field of water flow conveying between water treatment structures, in particular to a device and method for converting the flow state of open channel flow and the flow state of pipeline flow. The device is arranged at the intersection of the open channel and the vertical pipe. The open channel is located on the upstream of the vertical pipe, and the downstream of the vertical pipe is connected with the transverse pipe. The device comprises a guide rail group and a guide cylinder. The upper part of the guide cylinder is used for blocking water, blocking up the water level in an upstream open channel, stabilizing flow and reducing gas suction at a water flow inlet; a paddle at the lower part of the guide cylinder divides water flow entering the vertical pipe into four parts, so that rotation is eliminated, and gas suction is further prevented. When the water level in the upstream open channel is too high or too low, the guide cylinder moves upwards or downwards along with the guide rail set, and the water level in the open channel is controlled by changing the size of the gap between the guide cylinder and the vertical pipe. The lowest liquid level in an upstream channel can be effectively controlled, spiral flow and gas suction at an inlet of the vertical pipe are prevented, the water conveying capacity is improved, pipeline noise is lowered, and damage to a pipeline system caused by water plug flow in a water conveying pipe is avoided.

An object of the present invention is to obtain a gas adsorbent, a gas adsorption sheet, a filter medium, and an air filter that are excellent in gas component adsorption capacity and excellent in long-term stability of the adsorption capacity and also re-release little odor after being used as an air filter. A main object of the present invention is to provide a gas adsorbent that contains an acid-impregnated activated carbon, a base-impregnated activated carbon, and an aldehyde adsorbent.

The application discloses a wind power blade liquid damper, a prefabrication method and a wind power blade. The liquid damper comprises an elongated pipe and damping liquid. The elongated pipe is arranged in parallel on the SS inner surface and the PS inner surface of the wind power blade at a preset interval, is located at the wind power blade tip, is arranged along the airfoil contour line of the wind power blade, and is connected to the leading edge and the trailing edge of the wind power blade at two ends. The central axis of each elongated pipe is perpendicular to the pitch shaft of the wind power blade. The damping liquid is filled in the elongated pipe at a preset volume filling rate, so that the damping liquid is constrained in the elongated pipe and flows back and forth along the airfoil contour line of the wind power blade. The centrifugal force direction of the blade is always perpendicular to the movement track of the damping liquid. The liquid turbulent flow is generated by bending the elongated pipe to absorb vibration energy, the first-order pendulum vibration of the wind power blade can be effectively inhibited, and the liquid damper can meet the maintenance-free characteristic requirement in the service life.

The patent of the present invention discloses a three-stage sedimentation and filtration rural sewage centralized treatment system, which specifically relates to the technical field of sewage treatment systems. A three-stage sedimentation and filtration rural sewage centralized treatment system includes three foundation pits built according to the terrain difference, the inner wall of each foundation pit is cast with a concrete cushion layer, and the three foundation pits are sequentially provided with staggered first-stage filter ports, second-stage filter ports, third-stage filter ports and discharge ports, the first-stage filter ports are provided with gabions filled with sand and gravel of different grades, the second-stage filter ports are provided with a geotextile layer, the geotextile layer is folded from multiple geotextiles, and the third-stage filter ports are provided with a biofilm. The technical solution of the present invention solves the problem of difficult sewage treatment in remote rural areas, and can be used for sewage treatment in rural areas.

The utility model discloses a miniature visual electrothermal furnace, which comprises a furnace body assembly, a furnace plate assembly and a furnace cover assembly, the furnace body assembly comprises a furnace shell and a glass assembly, a furnace cavity is arranged in the furnace shell, at least one layer of heat insulation grid is arranged between the furnace plate assembly and the furnace shell, and a first electrode and a thermocouple joint are embedded in the side wall of the furnace shell. The thermocouple joint penetrates through the heat insulation grid and then abuts against the furnace plate assembly in a matched mode. The furnace plate assembly comprises a furnace plate, a first ceramic spraying layer, a nickel-chromium electric heating sheet and a second ceramic spraying layer, a sample plate is arranged in the furnace plate, and the first ceramic spraying layer, the nickel-chromium electric heating sheet and the second ceramic spraying layer are provided with through grooves corresponding to the sample plate; the furnace cover assembly comprises a furnace body sealing cover and a sealing cover frame, and the furnace body sealing cover and the furnace shell are fixed in a matched mode through a fastener. The vacuumizing device connected with the gas inlet pipe joint and the gas outlet pipe joint is used for vacuumizing the interior of the furnace chamber, and the heat transfer medium is reduced by arranging the multiple layers of heat insulation grids, so that the heating temperature of a sample is ensured.

The invention relates to an emergency device for a hydraulic cylinder for a lifting rail in a rolling mill in failure and a processing method.The emergency device for the hydraulic cylinder for the lifting rail in the rolling mill in failure comprises a lifting rail extension section, an upper fixing support, an upper boss, a lower fixing support and a lower boss, and one side of the upper fixing support is fixedly connected with the lifting rail extension section; an upper boss is arranged on the other side of the upper fixing support, a lower boss is arranged on the side portion of the lower end of the lower fixing support, the lower boss is located under the upper boss, and the bottom end of the upper fixing support abuts against the top end of the lower fixing support. The fixing support has the advantages that the upper boss is arranged on the other side of the upper fixing support, the lower boss is arranged on the side portion of the lower end of the lower fixing support, the upper fixing support and the upper boss are of an integrated structure, the lower fixing support and the lower boss are of an integrated structure, the bosses are used during accident emergency disposal, the integrated structure is designed, the strength is improved, machining is convenient, and maintenance is avoided.

This invention relates to the field of control model library management technology, specifically disclosing a combinatorial compilation method and system for control model library reuse. Addressing the shortcomings of existing technologies, such as reliance on manual verification, numerous implicit modifications, high mismatch risks, and untraceable reuse processes, this invention establishes encapsulation contracts for reusable units within the library, including input hypotheses, output commitments, timing windows, resource usage, and security levels. It constructs a combinatorial dependency graph based on the reuse requirements of the target project, performs multi-dimensional compatibility solving for interfaces, timing, resources, and security levels, and completes unit hierarchical labeling. For conditionally compatible units, it automatically generates wrapper layer code to match differences. After combinatorial compilation, it outputs target code, version seal records, and reuse evidence files, and provides replacement recommendations and enhancement suggestions for incompatible units. This effectively reduces reuse mismatch risks, eliminates implicit code modifications, and achieves full-process traceability and auditability for reuse, making it suitable for high-safety control scenarios such as flight control and rail transit signaling.

The invention provides a wheel corner zero-locking device suitable for rescue of an electronic guide rubber wheel vehicle, and relates to the technical field of vehicle steering, the wheel corner zero-locking device comprises a zero-locking device body installed between an axle main pin and a steering knuckle, the zero-locking device body comprises a spline pair and an actuator, the actuator comprises a shell, an actuating pressing plate, a rigid spring and a base, the actuating pressing plate is connected with a lower spline of the spline pair, the shell and the base are connected through threads, and the actuating pressing plate and the spline pair can move along the shell and the base. And closed spaces are formed between the shell and the actuating pressing plate, and a rigid spring is arranged in one of the closed spaces. According to the zero locking device, under the condition that a steering control system or a power-assisted steering system of the electronic guide rubber wheel vehicle fails, zero rigid locking which is easy to operate and high in reliability can be provided for the vehicle, it is guaranteed that the vehicle can normally run under the large turning radius, and the work of clearing passengers, returning to a garage and the like is completed.

The utility model relates to the technical field of travel switches, in particular to a travel switch contact plate, which comprises a travel switch contact plate structure and a travel switch, and is characterized in that the travel switch contact plate structure comprises a protruding plate, a positioning plate connected with the protruding plate and used for installation is arranged in the protruding plate, and the positioning plate is connected with the protruding plate. A contact plate which is connected with the protruding plate and can be in contact with the travel switch is arranged in the protruding plate, the positioning plates are symmetrically arranged at the two ends of the protruding plate, and the contact plate and the protruding plate are integrally connected. According to the travel switch contact plate, the maintenance of a user can be avoided, the strength of a shell door is enhanced, the reliable contact of the travel switch is ensured, the signal transmission is ensured, and an electromagnetic lock is enabled to act reasonably, so that the effect of reliable use is achieved.

The invention relates to the technical field of magnetic suspension and the field of engineering application, and provides a superconducting magnetic suspension simulation technical method and a superconducting magnetic suspension simulation system. The system comprises a floater and a permanent magnet track, due to the interaction of a magnetic field of a permanent magnet on the floater and a magnetic field of the permanent magnet track, the floater can suspend (suspend) above (below) a magnetic track, and the floater cannot derail due to guide force generated by the interaction of an alternating magnetic field of an electromagnet on the floater and the magnetic field of the permanent magnet track. According to the invention, the superconducting magnetic suspension phenomenon is simulated by using cheap equipment, so that the same effect as superconducting magnetic suspension can be realized, the superconducting magnetic suspension technology is replaced, and the device can be applied to the existing superconducting magnetic suspension application equipment (such as a magnetic suspension train) on a large scale, so that the cost and difficulty of the existing superconducting magnetic suspension equipment are greatly reduced; and large-scale popularization and application are facilitated.

The utility model discloses an intelligent ceramic insulator which comprises an insulator body (1), the insulator body (1) is hollow, and a high-voltage capacitor (2) and an acquisition circuit board (3) are fixedly installed at the two ends of the interior of the insulator body (1) respectively. The acquisition circuit board (3) is integrated with a power supply management circuit module (301), an envelope taking circuit module (302), a main control circuit module (303), a LoRa wireless communication module (304) and an onboard LoRa antenna (305) which are connected in sequence; and the high-voltage capacitor (2) is electrically connected with the power management circuit module (301). According to the utility model, through the built-in sensor for acquiring signals, electricity is taken from the high-voltage capacitor in the insulator and the signals are acquired, and the acquired signal data is sent to the background gateway through the built-in LoRa wireless module, so that the problem that in the prior art, when the sensor and the ceramic insulator are connected through a cable, the cable senses a space interference signal, and the signal data are transmitted to the background gateway through the LoRa wireless module is solved. And meanwhile, the installation and maintenance of the battery are avoided.

A small fully automatic chemiluminescence immunoassay analyzer and a method of using the same. The product comprises: a bottom top plate (26), a power supply (9) fixed on the bottom top plate (26), the power supply (9) connected to a main control board (8), the main control board (8) connected to a detection module (10) and an incubation module (11), the incubation module (11) connected to the bottom top plate (26), the incubation module (11) connected to a tip rack (12), a frame top plate (27) arranged on the main control board (8), and the frame top plate (27) connected to a sample loading module (13). The present invention is used for a chemiluminescence immunoassay analyzer.