9results about How to "Improve antifreeze effect" patented technology

The utility model relates to the technical field of centrifugal pumps, and discloses a centrifugal pump with a heat preservation anti-freezing structure. Comprising a pump body and a waterproof cover, the waterproof cover is arranged on the outer side of the pump body, a base is arranged at the bottom of the waterproof cover, heat preservation cotton is fixedly connected to the inner wall of the waterproof cover, two through holes are formed in the inner wall of the waterproof cover, and sealing rings are arranged on the inner walls of the through holes; accumulated snow on the top of the waterproof cover can be blown off by starting the snow removing assembly, the accumulated snow is prevented from freezing, the anti-freezing effect of the pump body is improved, when the pump body generates heat during operation, the sealing piece on the waterproof cover is opened at the moment, the heat generated by the pump body is discharged from the ventilation hole, and the anti-freezing effect of the pump body is improved. And when the pump body stops running, the sealing piece is closed, the waste heat in the waterproof cover can be prevented from rapidly volatilizing through the heat preservation cotton, and therefore the heat preservation purpose is achieved.

The utility model discloses a water supply and drainage anti-freezing device for municipal engineering, and relates to the technical field of water supply and drainage anti-freezing. The water supply and drainage pipe assembly comprises a first water supply and drainage pipe and a second water supply and drainage pipe, and the two ends of the first water supply and drainage pipe and the two ends of the second water supply and drainage pipe are each provided with a flange ring. The surface of the first water supply and drainage pipe and the surface of the second water supply and drainage pipe can be fully wrapped through the heat preservation cotton, so that a good heat preservation effect can be achieved, then the outer side face of the heat preservation cotton can be evenly wrapped through the limiting component, and the situation that adhesion is not tight enough after viscosity is reduced, and the service life of the heat preservation cotton is prolonged can be avoided. And meanwhile, the arranged sealing limiting shell can also achieve a good sealing and heat preservation effect on the joint of the first water supply and drainage pipe and the second water supply and drainage pipe, and therefore the anti-freezing effect of the anti-freezing device can be further improved.

The application discloses an anti-freezing low-temperature gate valve, which comprises a valve body, connecting pipes, a valve cover, a sealing seat, connecting pipes are communicated with both sides of the valve body, the upper end of the valve body is fixedly installed with the valve cover through bolts, the upper end of the valve cover is fixedly installed with the sealing seat through bolts, and the gap between the sealing seat and the valve cover is filled with packing; the anti-freezing low-temperature gate valve further comprises a threaded rod, which is rotatably connected to the inner side of the sealing seat, the upper end of the threaded rod is fixedly connected with a knob through bolts, the lower end of the threaded rod is connected with a movable cylinder, and the lower end of the movable cylinder is fixedly installed with a gate plate; an elastic torsion spring is arranged on the inner side of the gate plate; and a liquid tank is fixedly installed on the inner wall of the connecting pipe. The anti-freezing low-temperature gate valve can store the elastic torsion spring by using the liquid flow when the valve is opened, and can generate heat and store heat by using the liquid flow, so that the liquid inside the valve body can be kept warm and stirred after the valve is closed, and the valve body is effectively prevented from freezing.

This invention provides a flexible perovskite solar cell, its fabrication method, and its application. The flexible perovskite solar cell includes an electron transport layer, an organic gel layer, a perovskite light-absorbing layer, a hole transport layer, and a back electrode sequentially disposed on a conductive substrate. The organic gel used in the flexible perovskite solar cell of this invention has good thermal stability, antifreeze properties, as well as toughness and tensile strength. The gel contains abundant -NH2 and -OH, which can form hydrogen bonds with A-site organic cations and halide ions in the perovskite, inhibiting ion migration and improving the stability of the flexible perovskite solar cell.

The application belongs to the field of valves, and particularly relates to a valve with anti-freezing effect, which comprises a valve body, a valve pipe formed on the water inlet and outlet end of the valve body, and a flange interface installed on the valve pipe; an opening and closing mechanism comprises a shaft seat installed on the upper part of the valve body, and a driving device installed on the upper part of the shaft seat; the valve is improved, a channel for discharging residual liquid outward is added at the originally closed valve cavity, the opening and closing of the channel is controlled by a movable heating end seat, when a retaining hole and a drain hole are connected as a passage, residual liquid in the valve cavity can be directly discharged through the passage, freezing of the residual liquid in the valve cavity when the valve is closed is prevented, and the heating end seat can penetrate into the inner cavity of a valve plate when liquid is transmitted, the heating disc is heated by the combination of the heating end seat and a heat conduction interface, the transmitted liquid is heated by heat conduction of the valve plate, freezing in a cold environment is prevented, and the anti-freezing effect of the valve is improved.

The application discloses a sealing heating device for winter operation of an indirect air cooling system, comprising a driving mechanism, an anti-swing fixing mechanism and a plurality of connected anti-freezing curtains installed on the indirect air cooling tower; the top of the anti-freezing curtain is connected with the driving mechanism, and the bottom of the anti-freezing curtain is connected with the anti-swing fixing mechanism; wherein the anti-freezing curtain comprises an outer insulation layer and an inner heating layer, and the outer insulation layer is arranged outside the inner heating layer. The anti-freezing curtain is detachably arranged outside the indirect air cooling tower to heat and insulate the indirect air cooling tower, so that the problem of draught is effectively avoided; the anti-freezing curtain is easy to dismount and install according to the external environment, and has the characteristics of small space occupation, simple use, convenience and good anti-freezing effect.

The utility model provides a low-temperature-resistant frost-crack-resistant wire and cable, which relates to the technical field of wires and cables and comprises a heat-insulating layer, an isolating layer for protecting the heat-insulating layer is arranged on the surface of the heat-insulating layer, and a sizing anti-freezing net made of insulating materials is arranged on the surface of the isolating layer. And a reinforcing sleeve for supporting and protecting the shaping anti-freezing net is arranged on the surface of the shaping anti-freezing net. The advantages of the utility model are that the surface of the wire cable formed by the conductive wire core and the insulation protection sleeve is provided with the thermal insulation layer to carry out thermal insulation protection on the inside, and the shaped anti-freezing net is arranged to carry out reinforcement protection on the shaped thermal insulation layer; the overall stability and connectivity of the heat-preservation and anti-freezing structure of the electric wire and cable are enhanced through the connection between the reinforcing sleeve and the shaping anti-freezing net, meanwhile, the slotted hole structure in the shaping anti-freezing net can be used for intercepting permeating water to a certain degree, and it is avoided that the surface of the electric wire and cable is frozen to damage a heat-preservation layer of the electric wire and cable; and the thermal insulation performance of the wire cable can be effectively improved.

The application discloses a preparation method and application of a silver tailing slag composite material, and relates to the technical field of cement production, and particularly relates to a preparation method of a silver tailing slag composite material. The preparation method comprises the following steps: drying and carbonizing silver tailing slag, mixing the silver tailing slag with iron slag powder and fly ash, adding YT and YTM additives, and then grinding; and the application of the silver tailing slag composite material in cement production can keep the early strength of the cement basically unchanged, can slightly increase the late strength of the cement, and can meet the quality index requirements of other indexes. Due to the mixing of the fine particles, the durability, the frost resistance and the permeability resistance of the cement can be improved. The above test shows that the composite additive can be applied in the cement production.

The application discloses a kind of cold region tunnel waterproof heat preservation board self-adapting deformation pre-assembly rapid construction method, comprising the following steps: inspecting initial support flatness and cleanliness;Waterproof coating is sprayed to the surface of heat preservation board, and self-adhesive strip and hot melt pad are arranged on the front and back of heat preservation board;Head and tail of heat preservation board are sequentially connected and assembled into a whole by deformable connecting groove, and first waterproof plate is bonded and applied on the back of pre-assembled heat preservation board;A layer of waterproof plate connecting band is applied on the free side of initial support, and second waterproof plate is welded on the waterproof plate connecting band;The front of heat preservation board is integrally bonded to the second waterproof plate on the side of initial support, and deformable connecting groove is adjusted according to the shape of tunnel section, so that heat preservation board and connected second waterproof plate are closely attached;After completion of each process, the installation of heat preservation board and second waterproof plate is inspected and accepted in combination with design requirements.The application can realize pre-assembly rapid construction of heat preservation board in the construction process of cold region tunnel.