47results about How to "Does not affect insulation" patented technology

The invention relates to a testing jig, in particular to a PCB (Printed Circuit Board) insulation resistance testing jig, comprising a base, a PCB placing table, guide posts, test pins, a test pin table and test leads. The guide posts and the PCB placing table or the test pin table are fixed on the base, the PCB placing table is provided with a PCB locating structure, the test pins are arranged on the test pin table, the PCB placing table or the test pin table is provided with guiding holes matched with the guide posts, and the test leads electrically connect the guide posts and the test pins. In the invention, the PCB insulation resistance testing jig is a special jig, which avoids the steps of lead preparation, lead welding, soldering flux cleaning and the like in the prior art, improves the test efficiency, and prevents the high-temperature impingement on the PCB and the poor influence of the soldering flux on the tested results in the test lead welding process.

The invention discloses a polyurethane composite solar photovoltaic module frame and a preparation method thereof. The solar photovoltaic module frame is prepared from polyurethane composite, wherein the polyurethane composite is prepared from the following components by weight percent: 10-60% of polyurethane resin and 60-90% of glass fiber twistless continuous roving; the polyurethane resin comprises two components; the component I is isocyanate; the component II comprises polyols, a dewatering agent, a defoaming agent, an anti-ultraviolet agent and a filler. The preparation method of the polyurethane composite solar photovoltaic module frame disclosed by the invention comprises the following steps: respectively injecting the component I and the component II into a mould; arranging the glass fiber twistless continuous roving into a preset shape; soaking resin in the mould and curing for formation; carrying out pultrusion. The polyurethane composite solar photovoltaic module frame is light in weight, high in strength, excellent in insulating property, corrosion resistant and ageing resistant, and replaces an aluminium alloy material, the cost of the solar photovoltaic module frame is greatly reduced, and consumption of non-ferrous metal resource is reduced.

The invention provides a wind power generator system. According to the wind power generator system, multi-phase flows entering the generator can be separated to reduce moisture and impurities entering the generator so as to improve the insulating performance of the generator while a cooling effect is achieved, and to reduce abrasion for a heat exchanging surface of the internal cavity of the generator. The wind power generator system comprises the generator with a motor cavity and blades connected with the rotor of the generator; the wind power generator system also comprises a separating apparatus used for performing multi-phase flow separation for flows from a windward direction; the air inlet of the separating apparatus is used for introducing flows from the windward direction; the air outlet is communicated with the motor cavity; and the motor cavity is communicated with an exhaust fan for discharging hot air flows. The invention also provides a fluid transportation apparatus, wherein the fluid transportation apparatus comprises power equipment with an overheat cavity; the fluid transportation apparatus also comprises the separating apparatus used for performing multi-phase flow separation for flows from the windward direction; the air inlet of the separating apparatus is used for introducing flows from the windward direction; the air outlet is communicated with the overheat cavity; and the overheat cavity is also communicated with the exhaust fan for discharging hot air flows.

The invention discloses an environment-friendly building brick and a preparation method thereof. The environment-friendly building brick is prepared from the following raw materials in parts by weight: 60 to 80 parts of construction waste, 10 to 18 parts of coal ash, 15 to 30 parts of mineral residue, 3 to 10 parts of marble, 1 to 2 parts of magnet, 1 to 3 parts of medical stone, 3 to 7 parts of fluorite, 1 to 2 parts of alundum powder, 15 to 30 parts of clay, 0.1 to 0.5 part of shell active carbon, 0.1 to 0.3 part of nanoscale aluminum oxide, 0.08 to 0.12 part of sodium rosinate, 0.05 to 0.1part of sodium tripolyphosphate, and 10 to 15 parts of water. The building brick has the advantages of high strength, good wear resistance, acid and alkali corrosion resistance, high compactness and the like, also has insecticidal and healthcare functions, and has a good visual effect.

The invention relates to the technical field of surface corrosion and protection of thermal barrier coating layers, specifically to a thermal barrier coating layer resisting CMAS erosion and a preparation method. In the technical solution of the invention, prefabricated CMAS suspension is uniformly coated on the surface of a thermal barrier coating layer; and then, the coating layer is sintered for a period of time in a high-temperature furnace to form a compact apatite phase barrier layer on the surface. The layer has the features of high melting point, high compactness, excellent phase stability and high bonding force, not only can fill inevitable holes and cracks in the surface spraying process of ceramic layers, but also can block CMAS diffusion channels in the ceramic layers, effectively improves the CMAS erosion resistance of the thermal barrier coating layer.

The invention discloses an insulating flame-retardant ethylene-propylene-diene monomer hose composition which is characterized by comprising the following components in parts by weight: 100 parts of an EPDM (ethylene-propylene-diene monomer) 5890F, 2-6 parts of kaolin, 3-8 parts of zinc oxide, 1-3 parts of stearic acid, 2-5 parts of paraffin, 1-3 parts of an anti-aging agent MB, 50-70 parts of carbon black SP6400A, 130-190 parts of a flame retardant, 10-30 parts of paroline, 1-2 parts of sulfur, 10-15 parts of calcium oxide and 1.6-3 parts of an accelerant, wherein the accelerant comprises 0.2-0.5 part of an accelerant TT; and the flame retardant comprises 80-100 parts of aluminum hydroxide, 20-40 parts of zinc borate, 10-20 parts of antimonous oxide and 20-30 parts of decabromodiphenyl ethane. The invention has another purpose of providing a preparation method of the insulating flame-retardant ethylene-propylene-diene monomer hose composition, and on premise that electric insulation and insulation resistance of vulcanized rubber are met, mechanical strength requirements of rubber can be met.

The invention discloses a controlling cable which comprises a plurality of wires. The wires are twisted to form two sets, the outside of each set of wires is covered with an insulating layer, and the outsides of the insulating layers of the two sets of wires are together covered with a low smoke zero halogen flame retardant belt wrapping layer. An H-shaped nylon skeleton is arranged in the low smoke zero halogen flame retardant belt wrapping layer, and the H-shaped nylon skeleton is wrapped with the two sets of wires. The outside of the low smoke zero halogen flame retardant belt wrapping layer is sequentially coated with a semiconductive shielding layer, a polyester silk knitting tear-resistant layer and a jacket layer. The gap between the polyester silk knitting tear-resistant layer and the PVC jacket layer is filled with a mixture of water stopping paste and water stopping powder. According to the controlling cable, the inner structure layer is simple, various properties such as insulation, water resistance and compression resistance of the entire cable cannot be affected, mounting is convenient, and the practicability can be achieved.

The invention discloses a wire drawing and color complementing device for copper wire, which includes a base, and is characterized in that: a vertical bar is welded vertically on the upper side of the base, a support plate is welded on the vertical bar, a wire take-up roller is arranged on the support plate, and one side of the motor is fixed. On the opposite side of the support plate, a shaft is fixed on the take-up drum, and the shaft rotates to connect the support plate to the motor. The dryer is fixed on the support plate, and the splint is fixed on the support plate. There are two layers of felt clamped between the splint B, the dye barrel is fixed on the splint B, there are many fine holes on the splint and the splint B, the collection channel is fixed on the support plate, the collection channel is under the splint, and the support plate is set. Drum A, Drum A and Drum B are fixedly connected by a shaft, the shaft is rotatably connected to the support plate, a baffle is fixed on the opposite side of the support plate, the cross bar is rotatably connected to the baffle, iron sheets and discs are fixed at both ends of the cross bar, iron A rubber pad is fixed on the sheet, and the lower end of the short bolt fixes the cross bar.

The invention discloses a capacity-adjusting traction transformer, which includes a first core post and a second core post, A first low-voltage coil and a first high-voltage coil are sequentially arranged outward on the first iron core post, A second low-voltage coil and a second high-voltage coil are sequentially arranged outward on the second iron core post, The first end of the first high-voltage coil and the first end of the second high-voltage coil are respectively connected to the contacts of the first series-parallel switching switch, and the first end of the first low-voltage coil andthe first end of the second low-voltage coil are respectively connected to the contacts of the second series-parallel switching switch. According to capacity-regulating traction transformer, By changing the series-parallel connection of high and low voltage coils simultaneously to realize the switching of half-capacity and full-capacity, the electric charge of basic capacity of substation can be significantly reduced, the no-load loss of traction transformer can be significantly reduced, and the operating cost of substation can be effectively reduced.

A method and device for detecting breaking and closing positions of vacuum circuit breaker contacts are provided. According to the method, due to the fact that capacitance of a shielding case changes when the vacuum circuit breaker contacts break and close, a capacitance value of the shielding case is calculated by detecting a value of a copper foil induced electric field at the position of the shielding case on the surface of a vacuum circuit breaker, and the breaking and closing positions of the contacts are determined. The device comprises copper foil, an electric field sensor and a detecting and processing unit, wherein the copper foil as high as the shielding case is attached to the surface of the vacuum circuit breaker and connected to the input end of the detecting and processing unit through a lead. By means of the method, the breaking and closing positions of the contacts in an arc extinguishing chamber of the vacuum circuit breaker are acquired indirectly by detecting the value of the induced electric field at the position of the shielding case on the surface of the vacuum circuit breaker. The device is simple in structure, convenient to use, low in cost and high in detection sensitivity.

The invention discloses an ecological plant outer wall which comprises a steel framework and a wall board fixed to one side of the steel framework. The wall board is provided with a bearing part whichextends inwards and is provided with a stud or an internal thread connector in an embedded mode. An inserting fixing part is fixed on the bearing part through the stud or the internal thread connector. Inserting grooves are formed in the two ends of the inserting fixing part. A cultivation plate rack and an outer cover are connected into the inserting grooves correspondingly. An overturning coverplate is rotatably connected to the wall board at one side of the bearing plate, and plant through holes are formed. The steel formwork is fixedly connected with cultivation containers. According tothe technical scheme, plants can gain sunlight well, the physical performance of a curtain wall is not influenced, and the wind resistance, thermal insulation, and watertight and airtight performanceof the curtain wall are not influenced. Mounting, maintaining and plant cultivation are more convenient, and popularization is facilitated.

The invention discloses a protection structure for a zirconium element outer electrode lead of an oxygen sensor and a preparation method. A ceramic material protection layer is arranged in a sealed surface area of a zirconium element, the ceramic material protection layer is provided with an insulation material protection layer, and the insulation material protection layer and the ceramic material protection layer cover an outer electrode lead in the sealed surface area to form an outer electrode lead protection structure. The characteristics of the first protection layer (ceramic material protection layer) is completely consistent with that of a matrix material, by virtue of a primary sintering process, the first protection layer and a matrix are difficult to separate, and the outer electrode lead is well protected; the second protection layer (the insulation material protection layer) is insulated at a high temperature, after endurance for a long time, even if the second protection layer is separated from the first protection layer, the outer electrode lead is not influenced, and the second protection layer is tightly compressed, so that the insulation performance is not influenced; and the protection and insulation problem of the sealed area of the tubular zirconium outer electrode lead can be well solved, and the durability and reliability of a product are remarkably improved.

The invention relates to the technical field of power distribution network engineering, and discloses a distribution network branch line connecting device for power distribution network engineering construction; the device comprises a left fixed semi-ring and a right fixed semi-ring, the left fixed semi-ring and the right fixed semi-ring are movably connected, and the left fixed semi-ring and the right fixed semi-ring are connected to form a cylindrical structure; first sealing sleeves are connected to the outer surfaces of the two ends of the left fixing semi-ring, second sealing sleeves are connected to the outer surfaces of the two ends of the right fixing semi-ring, a first connecting block is connected to the top of the left fixing semi-ring, a second connecting block is connected to the top of the right fixing semi-ring, and the first connecting block and the second connecting block are connected through a clamping structure. According to the distribution network branch line connecting device for power distribution network engineering construction and the method thereof, the left fixing semi-ring, the right fixing semi-ring, the open groove and the clamping structure are used in cooperation, a branch line and a cable can be rapidly fixed or separated, the working efficiency of workers is improved, and the use of the device does not affect the insulativity of a wiring position.

The invention provides an insulating member of a station door assembly. The insulating member of the station door assembly comprises an insulating layer and a sectional bar for constructing the station door assembly, wherein the sectional bar is coated with an insulating layer. Door frame sectional bars of door frames are coated with insulating layers, and the door frames are interconnected through detachable fasteners, so that the replacement is easy; upright columns and composite insulating materials are subjected to global extrusion forming through steelwork, and weld segments are reserved,so that the problem that composite materials cannot meet the requirements on high temperature during the welding of upright column sectional bars and bottom plates is solved; the stress requirementsand reliability of the upright columns are met, and the insulating property of the upright columns cannot be affected. The condition that passengers get an electric shock due to touch with station doors can be avoided, and the performance is stable and reliable.

The invention provides a cable head wireless temperature-monitoring apparatus, and belongs to the technical field of electric power. The technical problems to be solved of an electric energy parameter monitoring device are as follows: the conventional temperature-monitoring device has following defects: firstly, the installation is not easy, and the networking is inconvenient; secondly, the service lifetime of a battery is short, and power taking is difficult; and thirdly, data collection is not easy, and analysis is not facilitated. The technical scheme to solve the problems and main purposes are as follows: the wireless temperature-monitoring technology is employed; firstly, the installation is convenient, and watchband type installation is adopted; secondly, power supply with the battery is employed, the effective service lifetime can reach more than three years, and the problem of power supply of a wireless module is solved; and thirdly, the networking is convenient, and functions of data storage, inquiry, and statistics can be realized with cooperation of a host computer.

Existing articles, such as underwear, beddings and the like at home and abroad only have a passive heat-preservation function, and used ice (hot water) bags only can be local and unabiding, can not keep constant temperature and also have poor comfort and effect if a patient requires active physical temperature reduction or heat preservation in the field of medical treatment. The invention provides a temperature-control underwear and bedding system comprising a netty pipeline system (5) and a water tank (1), wherein the netty pipeline system (5) is made from crisscross soft materials and can be embedded into underwear and a bedding according to the sizes of the underwear and the bedding, and the water tank (1) can carry out heat generation, refrigeration (3) and double-phase regulation (2). The netty pipeline system (5) comprises more than two main pipelines and a plurality of netty fine pipelines which are penetrated between the main pipelines and have a certain distance, so that sufficient body-contact area and uninterrupted circulating water flow rate are ensured, and the netty pipeline system (5) is conveniently embedded into the underwear and the bedding without influencing the ventilation, the comfort and other functions of the underwear and the bedding; the temperature and the water pumpage of the water tank can be set according to the requirement. The invention is used for medical treatment, can effectively change the temperature environment of a human body and achieves the aim of temperature reduction or body temperature enhancing. The invention is used for summer-heat prevention and cold resistance in families and hotels, has convenient and feasible daily use and also can greatly lower the energy consumption.

The invention relates to a special insulation shielding tool for replacing an intermediate-phase isolating switch in an on-load manner by using an insulating rod method. The special insulation shielding tool is widely used for replacing the intermediate-phase isolating switch of an overhead distribution line in an on-load manner by using the insulating rod method and belongs to the technical fieldof distribution line live-line overhaul. The special insulation shielding tool comprises an insulating spacer and a shielding cover which are provided with a connector and the connector I. The top ofthe insulating spacer is equipped with a hook body I and a hook body II. The shielding cover includes an insulator cover and a wire cover. Detachable insulated operating rods are mounted on the connector and the connector I. Each insulated operating rod includes a metal head sleeved with an intermediate ring. The intermediate ring is sleeved with a locking ring. An outer tube I and an outer tubeII sleeve an insulated transmission rod along the length direction. The tail end of the outer tube II is fixed to the tail end of the insulated transmission rod. The special insulation shielding toolis simple in structure, convenient to install, good in safety and reliability, wide in application range, and high in live working efficiency.

The invention discloses a stem cell preservation box and belongs to the technical field of vessels special for medical or pharmaceutical purposes. The stem cell preservation box mainly consists of a box body, storage chambers positioned in the box body and storage chamber doors; each storage chamber is provided with the corresponding storage chamber door, an opening is formed in each storage chamber door and provided with a manually operated door to manually open or close the opening, and an automatic storage chamber door opening and closing device for controlling the storage chamber doors tobe opened or closed is arranged outside the box body. The stem cell preservation box overcomes technical defects commonly existing in the prior art that the evaporation consumption of liquid nitrogenis large since liquid nitrogen containers are uncovered for a long time, fluctuation of internal temperature of existing preservation boxes is caused since the preservation boxes are opened for a longtime, temperature fluctuation is caused since collecting bags which do not need to be taken out are forced to be taken out, and finally the effect of refrigerating and preserving stem cells is influenced. The stem cell preservation box has the advantages that acquiring and placement of samples are separate and do not influence the temperature preservation effect, the storage chamber doors can beautomatically opened or closed according to the position of the stem cell preservation box inside or outside a liquid nitrogen container, and the temperature constancy of the interiors of the storagechambers is improved.

The invention discloses a mounting method and a mounting structure of a roller blind. The mounting structure of the roller blind comprises a roller blind external box and a window frame which are mounted on a wall body; the wind frame is arranged under the roller blind external box; the window frame is fixedly connected with the internal side of a roller blind guide rail of a roller blind system;a roller blind internal box is fixed on the roller blind guide rail; and the roller blind internal box is arranged in the roller blind external box. The mounting method of the roller blind comprises the steps of mounting the wind frame and the roller blind external box first; and then, mounting external wall heat insulation and external decoration; and finally, mounting the roller blind and a window sash; the mounting of the roller blind completely does not affect the heat insulation performance of the system; the pre-mounted roller blind external box solves the waterproof problem of the roller blind internal box and enables the service life of the roller blind internal box to be longer; the construction times of procedures, such as a heat insulation layer and external decoration, with strict requirements on temperature are prolonged; the possible pollution of site construction to industrial product doors and windows, the roller blinds and the like is avoided; and the product protection and maintenance cost is saved.

The invention discloses a synthesis block for synthesizing artificial diamond. The synthesis block is positioned in a high-temperature and high-pressure six-surface propping and pressing machine, a cavity used for sheathing and accommodating a graphite block is arranged inside the synthesis block, the cavity penetrates through the two opposite sides of the synthesis block, the synthesis block is formed by combining two or more than two split blocks, heating sheets are arranged between the split blocks, the split blocks consist of a first split block ands a second split block, the cavity is in a cylindrical shape, and the heating sheet is a metal heating sheet or a graphite heating sheet and is positioned between the first split block and the second split block. The synthesis block has the beneficial technical effects that the synthesis block is formed by combining two ore more than two split blocks, the heating sheet is arranged between the split blocks, the heat can be sufficiently utilized, the heat utilization efficiency can be improved on the premise of not changing the high-temperature and high-pressure major environment, in addition, the pressure transfer, sealing, thermal isolation and insulation effects cannot be influenced, and the yield and the quality of the diamond are further improved.

The invention belongs to the field of crop cultivating, and particularly discloses a rice seedling cultivating technique for mechanical transplanting. The rice seedling cultivating technique comprises the following steps of selecting seeds; preparing seedling cultivating soil; putting the seedling cultivating soil into a seedling tray to 80 percent of the capacity; uniformly distributing seeds to the seedling tray according to an amount of 62.5 mg-71.4mg per tray; covering the seedling cultivating soil onto the seeds, and maintaining the thickness to 0.4mm-1mm; horizontally placing the seedling tray in a rice field, wetting the seedling cultivating soil, draining water, and covering a thin film, wherein the thin film comprises a film layer I and a film layer II, the film layer I is directly coated on the seedling tray, and the distance between the upper surface of the film layer II and the upper surface of the seedling cultivating soil is 18mm-25cm; maintaining the wetting of the seedling cultivating soil in the seedling tray; when the seedling grows to 5cm, spraying a plant root and stem growth promoter once; preventing and curing the insects and the diseases one day before transplanting. The rice seedling cultivating technique has the advantages that by adopting the method, the germination time and the seedling emergence time can be shortened; the thickness of the seedling soil layer is uniform and consistent, the four corners of a rice block are vertical and square and are not lack of edges and corners, the seedlings are regular and uniform, the roots are intertwined, and the loosening is avoided after lifting.

The invention discloses a copper-sheathed fireproof cable, comprising a conductor core located in the center, the outer part of the conductor core is wrapped with a mica tape layer for protecting the conductor core and preventing oxidation of the conductor core, and the mica tape layer and the conductor core are arranged between the mica tape layer and the conductor core. There is a silica gel insulating layer, and a longitudinal seam welded copper sheath layer is arranged outside the mica tape layer; the conductor core is made of a plurality of conductors twisted, and at least one central conductor with a circular conductor cross-section is located in the center. The outer part of the conductor is twisted with at least one special-shaped conductor layer whose cross-section can be closely arranged after stirring. On the basis of satisfying the requirements of good fireproof performance, the invention has good moisture-proof performance, especially can be made in extra length, reduces the use of joints in construction, and provides reliable guarantee for ensuring the transmission of electric energy and information.

The invention relates to the technical field of alarms, in particular to a high-voltage electrified automatic alarm, which comprises a control circuit board and a work circuit board. Specifically, a work circuit support is disposed in a shell of the alarm, and the lower portion of the work circuit support is provided with the control circuit board which is connected with a high-voltage end electrode. The upper portion of the work circuit support is provided with the work circuit board which is connected with the control circuit board. A battery pack and a self-check switch are respectively connected on the work circuit board. The high-voltage electrified automatic alarm is capable of clearly distinguishing whether equipment is electrified or not, has self-check function and checks alarm condition, avoids hidden safety dangers caused by failure of the alarm, ensures safety of operators, is low in cost, small in size and long in service life and stand-by time, does not affect equipment insulation or change equipment structure, is suitable for various electrified places and capable of clearing indicating electrified parts and ensuring human safety of operators and is a safety protection auxiliary device of the human body.

The invention proposes a municipal garden power cable, which includes a conductor, and the conductor is covered with a layer of insulator. There are bowl-shaped claw petals arranged around the circumferential direction of the tear-proof sliding sleeve, and the bowl-shaped claw petals are several and are arranged at intervals along the length direction of the tear-proof sliding sleeve. The invention has the advantages of strong grip and adhesion, and is suitable for power supply of electrical equipment on shrubs, trees and other garden plants.

The invention discloses an electronic pouring sealant which is composed of a component A and a component B with the weight ratio of 100:(90-110). The component A includes the following raw materials by weight: 50-60 parts of modified vinyl silicone oil, 5-10 parts of Cu-Al-O-B modified by silica, and 1-3 parts of a coupling agent A. The component B includes the following raw materials by weight: 45-55 parts of dibromoneopentyl glycol diglycidyl ether, 5-10 parts of Cu-Al-O-B modified by silica and 1-3 parts of a coupling agent B. The invention also discloses a preparation method of the electronic pouring sealant, wherein the preparation method includes the following steps: preparation of the component A, preparation of the component B and preparation of the pouring sealant finished product. The electronic pouring sealant provided by the invention has more excellent high temperature resistant, insulation, sealing, waterproofing and heat conduction performance and flame retardancy.

The invention relates to a combined electrode column of a vacuum arc extinguishing chamber which overcomes the problems of lower flow capacity and weaker heat radiating capability which may seriously reach the vitrification temperature of epoxy resin to cause major accidents in the traditional sealing electrode column. The combined electrode column is characterized in that epoxy resin perfusion points are arranged in the mutual connecting positions of an upper shielding ring, an upper insulating barrel, an upper wire outlet end, a lower insulating barrel and a shielding electrode; pre-mixed epoxy resin and a solidifying agent are perfused for firmly connecting the shielding electrode, the lower insulating barrel, the upper wire outlet end, the upper insulating barrel and the upper shielding ring together to form an outer cover of the electrode column; the vacuum arc extinguishing chamber is assembled in the outer cover of the electrode column; and the conductive connection of the electrode column is realized through a movable contact, a spring touching finger and a lower wire outlet end. The combined electrode column has the advantages that the manufacturing technology of the electrode column is simplified; the insulating capability of the electrode column is enhanced; the manufacturing cost of the electrode column is reduced; once the vacuum arc extinguishing chamber self has a quality problem, only the vacuum arc extinguishing chamber needs replacing; an outer electrode column still can be used continuously; and therefore, the installation and the replacement of the vacuum arc extinguishing chamber are convenient.

The invention discloses an attached insulator body cleaning device and relates to the technical field of maintenance of electric equipment for substations. It includes an insulator body, an active cleaning unit, and a follow-up cleaning unit; the active cleaning unit includes a support ring surrounding the middle of the insulator body and rotatably connected to the insulator body, and a threaded rod fixed on the outer side of the support ring and perpendicular to the axial direction of the insulator body. , a threaded sleeve threadedly connected to the threaded rod; the threaded sleeve is rotated and installed on the base; the base is equipped with a screw sleeve driving motor, two rollers arranged symmetrically about the threaded rod, a roller driving motor, and A gear transmission is connected to the output end of the roller drive motor; the follow-up cleaning unit includes a crossbeam fixed on the base in the middle; a brush is evenly installed on the crossbeam and matches with the shed skirt of the insulator body. The invention can rotate and clean the surface of the insulator body along the radial direction of the insulator body, has good cleaning effect and reduces the labor intensity of substation maintenance personnel.

The invention discloses a gas barrier device, comprising a pressure input port (1) and a pressure output port (2), wherein an insulation medium layer (3) is arranged between the pressure input port (1) and the pressure output port (2). The gas barrier device disclosed by the invention can be used to prevent gas from entering oil medium storage equipment when detecting a pressure relay, so as to guarantee the safety of a power transformer.

Embodiments of the invention disclose a rubber cable insulating material and a preparation method thereof, belonging to the field of rubber cables. A cavity with a certain size is formed in a rubber cable in an air pressure mode; a silicone adhesive is injected into the cavity; the silicone adhesive is ensured not to be in contact with air in the injection process so as to allow the silicone adhesive to be kept in a certain colloid state in the cavity; the silicone adhesive has the characteristics of weather resistance, vibration resistance, moisture prevention performance, odor resistance andadaptation to large cold and heat change, so the applicability of a cable is improved; when the cable is in use and the surface of the cable is scratched by a sharp object, the silicone adhesive in the cavity overflows from the notch; the silicone adhesive can be cured into a tough rubber solid material once the silicone adhesive is in contact with moisture in the air, so the notch of the cable is automatically filled; and the characteristics of the cured silicone adhesive are similar to the characteristics of the rubber cable material, so the use of the rubber cable is not influenced, and the practicability of the cable is improved.