57results about How to "Guaranteed waterproof function" patented technology

The invention discloses a high-reliability miniature mechanical pump which comprises a pump body, pump chambers, a fluid inlet, a fluid outlet, an impeller and a brushless motor, wherein the pump body is formed in such a manner that a volute, a motor protection housing and a motor cover plate are connected with one another, and the pump chamber for accommodating the impeller and the pump chamber for accommodating the brushless motor are formed. The fluid inlet and the fluid outlet are formed in the volute and communicated with the pump chambers. The brushless motor is arranged in the pump chamber in the motor protection housing and the motor cover, an output shaft of the brushless motor is connected with a spindle of the impeller, and the brushless motor comprises a permanent magnet rotor assembly and a winding coil stator assembly, wherein a metal sleeve is arranged between the rotor assembly and the stator assembly, and a waterproof sealant layer is formed on the surface of a stator coil to wrap and seal the stator coil. The invention further discloses other structural adjustment. With the adoption of the high-reliability miniature mechanical pump, the water tightness of the motor can be achieved, the heat dissipation performance of the motor can be improved, the spare part structure of the pump can be further simplified and compact, the effective seal of the pump chambers and the precise concentric positioning of the impeller can be realized.

The invention provides a planted roof root-resistance waterproof roll which is composed of 28-30 parts of asphalt, 2-6 parts of SBS (styrene butadiene styrene), 3-6 parts of SBR (styrene butadiene rubber), 1.6-7 parts of APP (ammonium polyphosphate), 15-23 parts of mixed grease, 3-6 parts of fire retardant, 10-13 parts of anti-migration plasticizer, 23-24 parts of polyvinyl chloride resin, 8-10 parts of portland cement powder, 1.0-1.2 parts of nano-zinc oxide, 1-5 parts of dibasic lead phosphate, 2-8 parts of terpolymer resin, 1-5 parts of ABS (acrylonitrile butadiene styrene) resin, 15-22 parts of 909 anti-freeze binder, 10-12 parts of polypropylene fibers and 0.8-1.2 parts of chemical root retardant. The roll is capable of resisting root puncture without influences on normal growth of plants, is waterproof for long term, is capable of forming a high-intensity waterproof layer with high pressure water resistance capacity, and further is fatigue resistant and is high in tensile strength; besides, due to the SBS modified asphalt coating layer with strong original nature, the roll has the advantages of high adaptability to shrinkage and crack of the base layer, excellent high-temperature and low-temperature resistance capacity, high adaptability to cold and hot regions, and high corrosion, mildew and weather resistance.

The invention discloses a multifunctional integrated off-island shelter. The multifunctional integrated off-island shelter comprises a container quick-assembly house and a PVT combined heat and powersupply system, a photovoltaic tile support system is arranged at the top end of the container quick-assembly house, a full-open type door and window system is arranged on the front side of the container quick-assembly house, a lithium battery energy storage system and a partition plate are arranged in the container quick-assembly house, a power distribution room and a toilet are formed between thecontainer quick-assembly house and the partition plate in a surrounding mode, a heating water tank is placed in the power distribution room, a control box is installed on the heating water tank, a leading-in pipe and a leading-out pipe are connected between the control box and a graphene heat collecting plate, the graphene heat collecting plate is arranged on the back face of a photovoltaic tile,the photovoltaic tile is laid on a transverse rod, the transverse rod is fixed to a connecting rod, and the connecting rod is connected with a supporting rod through an adjusting rod. The multifunctional integrated off-island shelter is rapid to disassemble and assemble, convenient to move and carry and capable of providing various energy sources independently and becoming a positive energy building.

The invention discloses a planted roof waterproof heat preservation and exhaust system with exhaust devices and a construction method. The planted roof waterproof heat preservation and exhaust system comprises the rotatable exhaust devices which are evenly distributed in split seams of a planted roof, a flange plate, a steel pipe base, a connecting sleeve and a bend exhaust pipe, wherein the flange plate, the steel pipe base, the connecting sleeve and the bend exhaust pipe are sequentially arranged from bottom to top; the flange plate is fixed on a structural floor; the steel pipe base is fixedly welded on the flange plate; the upper end of the steel pipe base is detachably fixedly connected with the bend exhaust pipe through the connecting sleeve; exhaust holes which are evenly distributed are formed in the steel pipe base covered with a piece of glass cloth; on the structural floor of the split seams, an FTC heat preservation layer, a waterproof leveling layer, a waterproof layer and a fine stone concrete protective layer are sequentially arranged on the peripheries of the rotatable exhaust devices from bottom to top; a ventilation channel is reserved in the FTC heat preservation layer and filled with FTC dry powder; and the waterproof layer is upward returned to the rotatable exhaust devices for at least 150 mm. The planted roof waterproof heat preservation and exhaust system has the characteristics of safety, applicability and the like, has good popularization and practical value and produces good economic benefits after extensive application and popularization.

The invention discloses a curved building structure. The curved building structure comprises a steel structure with a shared boundary, a roof with dual water-proof and dual thermal-insulating effect, a specially-arranged purlin support structure and a cleaning fixation structure at the penetrating part of the purlin support. The cleaning fixation structure is capable of performing waterproofing work and is detachable.The curved building structure has following beneficial effects: by arranging a rigid-flexible double water-proof layer and a double thermal-insulating layer, water-proof and thermal-insulating functions of a building are ensured; by arranging a cavity, the thermal-insulating and sound-insulating functions of the building are added; special water-proof treatment is carried out on the penetrating part of the purlin support; by arranging the special purlin support structure, adjustments can be made according to the actual condition; and by arranging a detachable safe lock fixing structure, a curtain wall board is conveniently cleaned while the curtain wall board is prevented from affecting attractiveness of the building through rapid detachment.

The invention provides a fire extinguishing plug for cable trench internal fire early warning and automatic alarm. The fire extinguishing plug is characterized by comprising a data display and acquisition module, an alarm module, a sensor group, an aerosol fire extinguishing module, a communication module and a fire extinguishing plug body. The extinguishing plug body provided by the invention hasthe functions of rain prevention, dust prevention and lightning protection. The upper part of the fire extinguishing plug body are provided with display and alarm devices, and a side face of the fireextinguishing plug is provided with a maintenance door to facilitate the maintenance and repair of the fire extinguishing plug. The front side of the fire extinguishing plug is provided with a switchbutton for controlling the display parameters of the display device to be switched between gas concentration and temperature, a seam of the maintenance door is subjected to special processing so as to ensure the waterproof and dustproof performance of the seam. With the consideration of high temperature in summer and low temperature in winter, different alarm and fire extinguishing data combinations are set for the temperature and mixed gas concentration, and false alarm and missed alarm are effectively avoided. Through setting the system power supply, the high reliability and high stabilityof a power supply system of the fire extinguishing plug are ensured.

The invention discloses a cable interface sealing mechanism. The mechanism comprises a cable inlet and outlet conduit, a flexible conical sleeve, a locking compression ring and a locking bolt; the cable inlet and outlet conduit is fixedly connected with the box body inlet and outlet; the inner side of the outer end of the cable inlet and outlet conduit is set into a conical flaring structure; a cylindrical through hole is formed in the inner side of the flexible conical sleeve, and a cone matched with the cone-shaped flaring structure is arranged on the outer side of the flexible conical sleeve; the axial length of the flexible conical sleeve is greater than that of the conical flaring structure, the locking bolt is fixedly connected with the outer end face of the cable inlet and outlet conduit through a bolt through hole in the locking compression ring, and the flexible conical sleeve is tightly pressed between the cable inlet and outlet conduit and the cable through the locking compression ring under the action of the locking bolt to form sealing. A self-plastic sealing layer is arranged between the flexible conical sleeve and the cable. The invention further discloses an underwater power transformer adopting the sealing mechanism. Good sealing of the cable and the transformer box body can be achieved, and reliable guarantee is provided for an underwater power transformer which is truly immersed in water for a long time and operates safely.

The invention discloses a waterproof grille of a pure electric bus, and belongs to waterproof grilles. The waterproof grille comprises two transverse frames, two vertical frames and a waterproof grille body, wherein the two transverse frames and the two vertical frames form a rectangular window frame; the waterproof grille body is uniformly fixed between the two vertical frames from the upper part to the lower part; the waterproof grille body is inclined outwards; the top end of the waterproof grille body is connected with a vertical upward extending part; the bottom end of the waterproof grille body is connected with a vertically downward extending part; a vertical water retaining brush is arranged at the upper part of the bottom of the waterproof grille body; the bottom end of the downward extending part is connected with a second baffle parallel with the waterproof grille body; water leakage through holes are uniformly formed in the second baffle. The waterproof grille is reasonable in structural design, simple in manufacture technology and low in cost, guarantees a good ventilation effect on the basis that water from all directions cannot penetrate through the whole grille, and effectively guarantees the heat dissipation and waterproof functions of batteries in a luggage compartment.

The invention relates to a control box for an electric vehicle charger that may provide enhanced manipulation convenience and an improved waterproof function. According to an embodiment, the control box may include a case having a circuit board therein, the circuit board may include a light emitting unit and a switch, a cover member attached to an upper portion of the case and may be configured to allow light emitted from the light emitting unit to be transmitted therethrough, the cover member may include a press protrusion to press the switch, and an exterior member attached to an upper portion of the cover member.

The invention discloses a side-placed stage lamp optical system. The side-placed stage lamp optical system comprises lamp body supports arranged left and right, a support top plate is arranged at thetop of the lamp body supports and used for installing a lens assembly. A support bottom plate is arranged at the bottom of the lamp body supports and used for installing a cooling device. The lamp body supports, the support top plate and the support bottom plate jointly surround to form a lamp body frame, the lamp body frame is internally provided with a light source and optical assemblies arranged in the principal optic axis direction of the light source, and the optical assemblies are installed on the inner walls of the lamp body supports. Compared with the prior art, the optical assembliesare arranged on the inner walls of the lamp body supports which are arranged left and right, the independent operation and non-interference of the optical assemblies and the stability and firmness ofthe lamp body supports can be effectively ensured, and the side-placed stage lamp optical system further has the beneficial effects of simple structure, more streamlined lamp body and convenient follow-up maintenance.

The invention discloses a waterproof heat insulation roof with a detachable cleaning piece. The waterproof heat insulation roof comprises a first heat insulation layer fixed to the upper portion of ta steel structure; a second heat insulation layer is fixedly arranged above the first heat insulation layer; a flexible waterproof layer is sprayed to the bottom face of the second heat insulation layer, a rigid waterproof layer is fixedly arranged on the top face of the second heat insulation layer; an interval cavity is formed between the first heat insulation layer and the second heat insulation layer; a purlin hanger structure fixed to the steel structure penetrates through the roof to be fixedly connected with a fixing supporting rod; the fixing supporting rod is provided with a fixing sleeve, and a safety rope fixing piece is detachably connected to the fixing sleeve. Due to the two waterproof layers and the two heat insulation layers, the waterproof and heat insulation functions of a building are ensured; by arranging the cavity, the heat insulation and sound insulation functions of the building are added; by arranging the external rigid waterproof layer and the internal flexible waterproof layer, the two waterproof layers are matched, the better waterproof effect is achieved; due to a detachable supporting point, and the beautifying effect is not affected while the roof is easy to clean.

The invention provides an existing roof waterproof system and a waterproof roof. The system comprises a butyl rubber plastic waterproof coating layer arranged on an existing roof; a waterproof roll layer and an ultraviolet resisting layer are arranged on the butyl rubber plastic waterproof coating layer; cell joints and settlement joints are formed in the existing roof and filled with caulk compounds, and gluing and sealing are performed through the caulk compounds. The existing roof is the roof which is not subjected to base layer treatment in the prior art, namely the roof which an existingwaterproof layer; according to the technical scheme, the roof with the existing waterproof layer is directly constructed, and therefore the construction step for base layer treatment is omitted, the construction time is shortened, the construction efficiency is improved, the construction workloads are lowered, and the construction cost is lowered; the existing layer is directly constructed, and byarranging the butyl rubber plastic waterproof coating layer and the waterproof roll layer or the ultraviolet resisting layer, the waterproof function is ensured.

The invention discloses a foundation solidification agitating head, which comprises a left agitating drum, a main machine power head shell, and a right agitating drum, the left agitating drum is arranged at the upper end of one side of the main machine power head shell, a left sealing cover is arranged on the top of the left agitating drum, a left hydraulic motor rotation speed reducer is arrangedinside the left agitating drum, a left floating oil seal and a left fixed flange are respectively arranged on one side of the left hydraulic motor rotation speed reducer, the right agitating drum isarranged at the lower end of one side of the main machine power head shell, a right sealing cover is arranged on the bottom of the right agitating drum, a right hydraulic motor rotation speed reduceris arranged inside the right agitating drum, and a right floating oil seal and a right fixed flange are respectively arranged on one side of the right hydraulic motor rotation speed reducer. Since theproduct adopts hydraulic power and does not have any motor, the waterproof function in the process of use is ensured; and since a triangular shape is adopted and the angle between the two agitating drums is 130 degrees, the penetrating performance of the design is better than the penetrating performance of the conventional T shape.

The invention provides a root puncture resistant self-adhesive waterproof coiled material and a preparation method thereof, and relates to the technical field of waterproof materials. The root puncture resistant self-adhesive waterproof coiled material is prepared from the following components in percentage by mass: 5% of terpene resin, 20% of 10 # asphalt, 35% of 90 # asphalt, 10% of engine oil,8% of styrene-butadiene-styrene segmented copolymer, 4% of a root inhibitor and 18% of talcum powder. The waterproof coiled material performs well on the building surface where plants need to be planted, can play a waterproof role, and effectively prevents vegetation from puncturing a waterproof layer.

The invention discloses a low-noise oil-gas separation type cylinder head cover assembly. The low-noise oil-gas separation type cylinder head cover assembly comprises a cylinder head cover body provided with an inner cavity, a gas outlet pipe communicating an outer cover of the cylinder head cover body with the inner cavity, a labyrinth cover plate assembly arranged in the middle of the inner cavity, and an oil baffle plate arranged at one end of the inner cavity; the outer cover surface of the cylinder head cover body is provided with a gas outlet communicating with the inner cavity, a PVC valve hole and an oil filler cover hole; a downwards-concave water guiding groove is formed in the middle of the outer cover surface; a plurality of ignition coil mounting bases are arranged in the water guiding groove at intervals; the bottom surface, close to the oil filler cover hole, of the inner cavity is provided with an oil baffle plate mounting base; the inner cavity is internally provided with a first reinforcing rib connected with the ignition coil mounting bases; the end of the first reinforcing rib is provided with a second reinforcing rib connected with the first reinforcing rib, the bottom surface of the inner cavity and the side surface of the inner cavity; and the first reinforcing rib and the side wall of the inner cavity are provided with a plurality of sealing plate mounting bases. The cylinder head cover assembly has the function of flow guiding, liquid accumulated at the top of a cylinder head cover can be effectively discharged, the structural strength is high, theanti-vibration capability is good, the service life is long, and low-cost oil separation can be achieved.

The invention discloses a zinc-plated substrate powder coating and a preparation method thereof. The powder coating comprises, by mass, 55-65 parts of epoxy resin, 10-14 parts of a phenolic curing agent, 15-17 parts of titanium dioxide, 0.06-0.10 part of carbon black, 0.01-0.02 part of pigment green, 0.5-0.6 part of iron oxide yellow, 0.8-1.0 part of a leveling agent, 0.2-0.4 part of a defoamer, 0.2-0.3 part of a catalyst and 8-16 parts of a filler. The preparation method comprises the following steps: mixing all raw materials in proportion to obtain a coating mixture; conveying the coating mixture into a twin-screw extruder, and extruding the mixture to obtain a coating liquid; cooling the coating liquid, and tabletting the cooled coating liquid to obtain a coating tablet; and crushing and screening the coating tablet to obtain the powder coating product. The adhesion of the powder coating is improved, and the quality of a coating layer formed by the coating is improved.

The invention discloses a production method of waterproof composite bedsheet fabric. The production method comprises following steps: firstly, gray cloth is made from hollow cotton and polyester fiber, and the inner side of the gray cloth is provided with a layer of metal net via pressing; the processed gray cloth is subjected to peached finish, and sizing of the gray cloth is carried out according to production requirements; and at last, the sized gray cloth is bonded with TP thin film with polyurethane (PU) adhesive. The production method is simple, and is easy to understand, possesses water resistance, is capable of realizing heat preservation, and is comfortable for using; water resistance, air permeability, and moisture permeability are increased greatly; and excellent performance is maintained.

The invention relates to a multifunctional mattress based on computer control. The multifunctional mattress comprises a mattress body, wherein the mattress body comprises a bamboo charcoal fiber layer, an electric heating layer and a magnet pavement layer from bottom to top sequentially; the magnet pavement layer adopts uniformly arranged magnet sheets, gaps are left between the magnet sheets, anda humidity sensor is arranged on the magnet pavement layer; a temperature sensor is arranged on the electric heating layer; a controller is arranged on the bamboo charcoal fiber layer; a fan is arranged on one side of the mattress body, and a casing is arranged outside the fan and higher than the mattress body; an air outlet is formed in the side wall of the casing, and the controller is connected with the temperature sensor, the humidity sensor and the fan. The mattress is simple in structure and reasonable in design; by means of computer control, the ventilation effect can be ensured underthe conditions of ensuring the health care function, waterproof function, cooling function and warm keeping function, comfort of human bodies is improved, and breeding of bacteria is avoided.

The present invention relates to a long-lasting powder essence composition with improved coloring and skin feeling and its preparation method. The powder essence composition is a high-fitting coloring powder not likely to smear or wear off. The composition turns into liquid the moment it is rubbed on the skin to offer a natural color tone like water color, keeps the color clear without getting cakey even when it is reapplied multiple times, and delivers a clearer color as it glides on the skin to break powder and water particles. The powder essence composition according to the present invention is also a powder emulsion, which makes the skin feel light and hydrated rather than sticky or stuffy when applied to the skin and stays long due to its water-resistant function. In addition, the powder essence composition according to the present invention contains different functional moisturizing agents to provide plenty of nourishment when applied to the skin. The composition makes the skin feel fresh and hydrated rather than stuffy or heavy, lightly sinks into the skin like nothing is applied on the skin, to display a strong tint function, stays long just with one touch and has a good water-resistant effect, so it does not bleed when in contact with water.

The invention relates to a waterproof composite fabric which is characterized in that the inside of a waterproof layer is filled with hollow cottons, the inside of a polyester fiber mixed layer is provided with a metal mesh layer consisting of metal wires, the inside of the metal mesh layer is provided with a polyamide fiber layer, and the outside of the mixed layer is provided with a waterproof layer. The waterproof composite fabric provided by the invention is reasonable in structure and easy to manufacture, has the characteristics of antistatic property, heat preservation and good comfortableness while maintaining a waterproof function, and can be used for manufacturing various protective clothing and high-grade suits, jackets, bed sheets, carpets and the like, therefore, the waterproof composite fabric has a very broad development prospect.

The invention provides an energy-saving ventilation roof structure which comprises a herringbone roof, wherein a rectangular concrete body arranged in the longitudinal direction is arranged in the middle of the herringbone roof; a plurality of cable guide pipes arranged at equal intervals and in the transverse direction are arranged in the longitudinal direction of the rectangular concrete body; each cable guide pipe is of a reverse V-shaped structure; a circular arc transition section is arranged in the middle part of the reverse V-shaped structure; verge boards are arranged at the two ends of the herringbone roof; inclined holes arranged in a way of corresponding to the cable guide pipes are formed in the verge boards; the verge board sections positioned among the cable guide pipes are provided with eave grates; ventilation structures are arranged in the rectangular concrete body; a hanging cable device is arranged in each cable guide pipe, and comprises a steel strand; the two endsof the steel strands are anchored onto anchoring boards arranged at the outer sides of the verge boards at two sides; and flashing boards are arranged at the outer sides of the anchoring boards of thecable hanging devices. The cost is reduced by optimizing the roof structure; the waterproof function is ensured; meanwhile, the energy can be saved, and ventilation can be realized; the performance of a roof system is improved; and the service life of the roof system is prolonged.

The invention discloses a self-repairing polymer waterproof coiled material and a preparation method thereof. The waterproof coiled material is composed of a self-repairing layer and two polymer layers arranged on the two sides of the self-repairing layer respectively. A microcapsule is adopted to provide a good self-repairing function for the waterproof coiled material, the waterproof coiled material can be rapidly repaired after being punctured by a plant root system, and the waterproof function of the waterproof coiled material is guaranteed. The microcapsule is good in adaptability to a humid soil environment, where plants are planted, a core material of the microcapsule can be solidified in the humid environment under the condition that a catalyst is not used, repairing of the waterproof coiled material is completed, and the self-repairing period is greatly shortened. The self-repairing layer adopts organic silicon cured at the room temperature as a matrix, a precursor of the self-repairing layer is in a liquid state, a high-temperature reaction is not needed in the curing process, damage to the microcapsule in the self-repairing forming process can be reduced, and the retention rate of the microcapsule can be greatly increased. The waterproof coiled material has a good waterproof property, root resistant property, self-repairing property, and flame retardant property, anda long service life.

The invention discloses a full-transparent waterproof flexible organic memristor and a preparation method thereof. The full-transparent waterproof flexible organic memristor comprises: a flexible substrate; a bottom electrode formed on the flexible substrate; a PEDOT:PSS organic functional layer subjected to low-temperature annealing is formed on the bottom layer electrode; and top layer electrodes which are mutually isolated and distributed on the PEDOT:PSS organic functional layer. According to the invention, the problem of performance attenuation or failure of the device due to the fact that the organic material device is easily affected by water is solved, and possibility is provided for a waterproof application scene of the organic memristor.

The invention discloses a lamp respirator structure and a lamp with a respirator and relates to an illumination device or functional characteristics of a system of the illumination device or parts of the illumination device, in particular to the lamp respirator structure used for preventing air or water for the lamp and the lamp with the respirator. The lamp respirator structure is arranged on the inner side of a sealing end cover of the lamp and comprises a diaphragm, a respirating cavity and a respirating hole. The lamp with the respirator comprises a lamp main body and at least one sealing end cover, wherein the inner side of the sealing end cover at least comprises more than one lamp respirator structure; and the interior of the lamp main body is a respirable sealed water-proof airtight space. The respirator and the sealing end cover of the lamp are integrally designed and a groove structure is arranged on the sealing end cover and serves as the respirating cavity, so that a shell and an air flow pipe of an externally arranged respirator are omitted; and the diaphragm substitutes a silicon rubber sealing ring of the current lamp, so that components in the lamp main body are not corroded by rain water, dust and other harmful liquid or gas, and antifogging and airtight functions are added.

The invention discloses a new energy automobile charging gun convenient to plug and unplug, and the charging gun comprises a gun head, wherein a wire bundling pipe is arranged at one end of the gun head, a locking piece matched with the wire bundling pipe is arranged on the outer side of the wire bundling pipe, a connecting piece is installed at the end, away from the wire bundling pipe, of the gun head, and a gun head inserting cylinder is arranged on the inner side of the connecting piece; a gun head inserting cylinder matched with the connecting piece is arranged on one side of the connecting piece, a vent hole is formed in the gun head inserting cylinder, and one end of the vent hole extends to the outer side of the top of the PE pole. The charging gun is provided with a reset spring,an air-bag-shaped sealing spherical head, a vent hole, a sealing ring, the gun head and the gun head inserting cylinder; the charging head has a waterproof function when the gun head and the gun headinsertion cylinder are not connected, the reset spring pushes the air-bag-shaped sealing spherical head to block the vent hole, the interior is in a sealed state, and the internal air tightness is improved; therefore, rainwater is prevented from entering the charging head or the interior of the automobile to cause corrosion and even burnout of parts.

The invention discloses a composite material reinforcing special-shaped mortise and tenon self-fastening-type duct pieces for underground pipe galleries. The composite material reinforcing special-shaped mortise and tenon self-fastening-type duct pieces for main underground pipe galleries, multi-body galleries, branch galleries and main subsidiary gallery bodies are jointly composed of duct piececonnecting tapered planes, high-performance concrete, concave mortise and tenon joint faces, longitudinal basalt fiber composite material reinforcing ribs, concave mortise and tenon stress slopes, convex mortise and tenon joint faces, convex mortise and tenon composite material reinforcing ribs, convex mortise and tenon stress slopes, convex mortise and tenon concrete and arc composite material reinforcing ribs. The composite material reinforcing special-shaped mortise and tenon self-fastening-type duct pieces for the underground pipe galleries replace duct pieces with reinforced steel materials and reinforced concrete and for the underground pipe galleries, the problem that the service life of main underground pipe gallery bodies is short due to the ubiquitous phenomena of corrosion of duct pieces with steel fastening parts and reinforced concrete and for the pipe galleries, and disassembly of duct pieces with expansive concrete is solved, the safety and reliability of long-term use of the underground pipe galleries are improved, the maintenance and replacement period of the underground pipe gallery bodies is prolonged, and the service life of the main underground pipe gallery bodies is greatly prolonged.

The invention relates to the technical field of switchgears, and particularly relates to a GCS low voltage switchgear. The GCS low voltage switchgear comprises a cabinet body (1), a main circuit connector (2), a wire (4), a bolt (5), a nut (6), a wiring board (7) and an insertion connection block, wherein the wire (4), the bolt (5) and the nut (6) are connected with a wiring terminal (3). The insertion connection block comprises an insertion connection block body (8) made of rubber and a bow-shaped insertion plate (9) made of copper. The bow-shaped insertion plate (9) is inlaid in the insertion connection block body (8). A first liquid seal structure is arranged between the insertion connection block body (8) and the main circuit connector (2). The bolt (5) passes through a bolt abdicate hole (14) and is tightened with the nut (6). A third liquid seal structure is arranged on the bolt (5) and the nut (6). Through the structure, condensate water at the top of the GCS low voltage switchgear is effectively prevented from dropping to the connection of the wiring terminal and the wiring board of the main circuit connector.

The invention provides an anti-explosion fire-proof protection box for a cable joint. The protection box comprises an upper arc-shaped casing pipe and a lower arc-shaped casing pipe, wherein the upperarc-shaped casing pipe and the lower arc-shaped casing pipe are oppositely arranged and are connected for forming a box body; a channel is arranged between the upper arc-shaped casing pipe and the lower arc-shaped casing pipe for placing the cable joint; and the inner wall of the upper arc-shaped casing pipe and the inner wall of the lower arc-shaped casing pipe are independently coated with a high-temperature-resistant layer. By use of the protection box, the upper arc-shaped casing pipe and the lower arc-shaped casing pipe are oppositely arranged and are connected for forming the box body,in addition, the channel is arranged between the upper arc-shaped casing pipe and the lower arc-shaped casing pipe for placing the cable joint so as to protect the cable joint, the inner wall of the upper arc-shaped casing pipe and the inner wall of the lower arc-shaped casing pipe are independently coated with the high-temperature-resistant layer, the anti-explosion fire-proof effect of the protection box is improved through the high heat conduction coefficient, the high heat transfer performance, the high ductility and the high thermal shock resistant coefficient of the protection box, and therefore, fire hazard accidents due to cable circuit faults can be avoided.