111results about How to "Improve explosion-proof performance" patented technology

The invention discloses an explosive environment airtight medium-voltage power transmission cable, and relates to the technical field of power cables, the explosive environment airtight medium-voltage power transmission cable comprises a central conductor, the outer side of the central conductor is tightly coated with an internal conductor insulator, and the outer side of the internal conductor insulator is tightly coated with an insulated conductor shield; the outer sides of the multiple insulated conductor shields are jointly coated with a steel tape armoring, the outer side of the steel tape armoring is tightly coated with a PVC protection sleeve, and the outer side of the PVC protection sleeve is provided with an external telescopic expansion protection mechanism. A fireproof barrier is constructed on the outer side of the cable through the flame-retardant metal thin net, it is ensured that combustible gas outside the cable cannot be ignited even if open fire appears in the cable, the overall fireproof and explosion-proof performance of the cable is further effectively improved, and meanwhile the outer diameter of a fault position is actively increased, so that the service life of the cable is prolonged. A high-voltage breakdown protection layer in the cable is prevented from igniting external combustible gas, and the overall protection performance of the cable is improved.

The utility model relates to the technical field of electrical control boxes, in particular to an explosion-proof marine electrical control box which comprises a box body, the box body comprises an outer coating layer, an inner coating layer, an outer stainless steel plate, an inner stainless steel plate, a sound insulation cotton layer, a heat preservation plate layer and a screen plate, the sound insulation cotton layer is arranged on the outer side of the screen plate, and the outer stainless steel plate is arranged on the outer side of the sound insulation cotton layer. An outer coating layer is arranged on the outer side of the outer stainless steel plate, a heat preservation plate layer is arranged on the inner side of the screen plate, an inner stainless steel plate is arranged on the inner side of the heat preservation plate layer, and an inner coating layer is arranged on the inner side of the inner stainless steel plate. The utility model has the functions of sound insulation, noise reduction, heat preservation and moisture prevention, retains the original stainless steel plate design, designs the outer stainless steel plate and the inner stainless steel plate to play the roles of impact protection and supporting plasticity, coats the inner coating layer and the outer coating layer to realize the functions of insulation and moisture prevention, integrates the whole box body, reduces the thickness of the used stainless steel plate, and reduces the cost. The overall weight is reduced, the explosion-proof effect is better, and the moisture-proof effect is achieved from the two aspects of water insulation and heat preservation.

The invention discloses an explosion-proof motor for an underground coal mine, and relates to the technical field of explosion-proof motors, and the explosion-proof motor comprises a housing, the outer wall of the housing is fixedly connected with a plurality of short fins at equal intervals, the inner wall of the housing is fixedly connected with a stator around the circumference, and the inner wall of the center of the housing is rotatably connected with a rotating shaft. Through vertical separation of the flow guide plate and flow guide of concave arc faces on the two sides, the resistance of hot air shunting to the two sides can be reduced, after the hot air enters the ventilation cavity, the heat dissipation area is increased under the flat arrangement of the hot air, and heat on the surface of the ventilation cavity is rapidly guided out through cooperation of the unfolded first fins, the unfolded second fins and the unfolded third fins, so that the heat dissipation efficiency is improved. The temperature exchange rate can be increased through double heat conduction, hot air in the ventilation cavity can be rapidly cooled, airflow and temperature on the two sides can be balanced, the stability of the system is improved, the equipment temperature can be reduced through good heat dissipation, and electric sparks caused by overheating are reduced.

The anti-explosion oil pipe comprises an oil pipe, one end of the oil pipe is connected with a first pipe connector, and the end, away from the first pipe connector, of the oil pipe is connected with a second pipe connector. And a sleeve sleeves the outer side of the oil pipe and pressurizes the oil pipe. The oil pipe is prone to collision, extrusion or friction in the working process, the sleeve is arranged on the outer side of the oil pipe, oil pipe abrasion can be reduced, the risk of oil pipe damage is reduced, the anti-pressure capacity of the oil pipe is improved, the oil pipe slope fracture risk is reduced, and the oil pipe anti-explosion capacity is improved.

The utility model relates to a composite porcelain bushing explosion-proof current transformer, which comprises a high-voltage shell, an explosion-proof bushing, a base and a secondary junction box, the secondary junction box is arranged on the bottom surface of the base, the high-voltage shell is connected and supported on a bottom plate at the upper end of the base through metal flanges adhered to the two ends of the porcelain bushing, a glass fiber reinforced plastic inner bushing is lined in the porcelain bushing, and the explosion-proof bushing is arranged on the bottom plate. Metal flanges are adhered to the two ends of the porcelain sleeve; the glass fiber reinforced plastic inner sleeve is connected with the shielding supporting pipe in a penetrating mode along the same center line, the shielding supporting pipe extends into the high-voltage shell and supports the secondary coil through the coil shielding cylinder, the shielding supporting pipe is located on a bottom plate at the upper end of the base, a lead is arranged in the shielding supporting pipe, and the two ends of the lead are connected into the secondary coil and the secondary junction box respectively. The shielding supporting pipe is made of hard aluminum alloy, and the space between the shielding supporting pipe and the glass fiber reinforced plastic inner sleeve is filled with insulating gas. The device is simple in structure, effectively guarantees the supporting of a high-voltage insulating part, is firm and stable in structure, can prevent the supporting sleeve from being damaged and leaked, and is safe to use.

The utility model relates to the technical field of dies, in particular to a die-casting die for producing an explosion-proof lamp body, which sequentially comprises an upper die holder, a lower die holder and a demoulding mechanism for driving the lower die holder to lift from top to bottom, a lower die core is arranged in the middle of the lower die holder, and an upper die core corresponding to the lower die core is arranged in the middle of the upper die holder. A left die core and a right die core are embedded in the left side and the right side of the lower die core and the left side and the right side of the upper die core at the same time, a core pulling mechanism for driving the left die core and the right die core to move is arranged in the lower die base, and the upper die core, the lower die core, the left die core and the right die core form an explosion-proof lamp body die-casting cavity after die assembly.

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The utility model discloses a controller box which comprises a box body (1) and a box door (2), one side of the box door (2) is rotatably matched with one side of the box body (1) through a hinge (3), and a sealing ring (4) is arranged on the open end face of the box body (1). The box is characterized in that a supporting pad (5) is arranged on the side, away from the hinge (3), of the inner bottom side face of the box body (1), and balls (6) are rotatably arranged on the supporting pad (5); a lifting plate (7) is fixedly arranged on the inner side of the box door (2); and when the box door (2) is closed, the lifting plate (7) is lifted by the balls (6). When the box door is closed, the box door and the box body do not have relative position dislocation, normal locking can be achieved, the box door cannot be affected by the bulkiness of the box door, and meanwhile the box door and the box body are completely matched in an aligned mode, so that the sealing performance is guaranteed.

The utility model belongs to the technical field of chemical equipment, and discloses a low-temperature dangerous chemical reagent storage cabinet. A low-temperature dangerous chemical reagent storage cabinet comprises a storage cabinet body, an equipment placement cabinet, a support, a cabinet door and a reagent placement table, the storage cabinet body is in a hollow shape with an opening in one longitudinal side, and the reagent placement table can be detachably installed in the storage cabinet body; the equipment placing cabinet is arranged below the storage cabinet body in a connected mode, cooling equipment can be placed in the equipment placing cabinet, and the support is arranged below the equipment placing cabinet in a connected mode. Through cooperative work of the heat absorber and the closed-loop water cooling system, rapid cooling is achieved, the low temperature in the cavity is maintained, the cooling device is suitable for chemical reagents sensitive to the temperature, the damping device effectively absorbs vibration of the cooling device, and collision between reagent bottles caused by vibration generated when the cooling device works is avoided.

This invention discloses a cold-resistant, low-smoke, airtight, explosion-proof control cable and its manufacturing method, relating to the field of control cable technology. It includes a central transmission cable with an outer protective rubber layer. The outer protective rubber layer is covered by an inner anti-slip silicone ring, which is further covered by an inner rubber expansion layer. A side-guided inner tube is located outside the inner rubber expansion layer. This invention utilizes a flexible expansion airbag and an adjustable isolation box with a linked internal and external pressure-stabilizing structure to maintain the internal air pressure of the control cable within a suitable range during use. This allows for rapid sealing and protection of the damaged area after external damage, preventing internal damage or electrical sparks caused by external impurities after the outer sheath is damaged. This effectively improves the explosion-proof capability and safety of the control cable.

The present application relates to the technical field of castables, and specifically discloses a high-performance hawk beak castable and a preparation method thereof. A high-performance hawk beak castable, using a first aggregate and fused white corundum as aggregates, composite coated graphite powder, silicon nitride, α-alumina micropowder, silicon dioxide micropowder and barium sulfate as powders, calcium aluminate cement as a binder, sodium hexametaphosphate and sodium tripolyphosphate as composite dispersants, tri(2-hydroxypropionic acid) aluminum salt and an active agent as adjuvants, and is cast, heat-insulated, and fired in two stages. The high-performance hawk beak castable prepared in this application has the characteristics of high flexural strength and compressive strength, small permanent linear change rate, expansion resistance, good thermal shock stability, good burst resistance, and metal corrosion resistance.

The utility model relates to the technical field of chemical ammonia decomposition, and discloses a positive pressure type ammonia decomposition device which comprises a shell, a lining is fixedly connected to the inner wall of the shell, a spacing cavity is formed between the lining and an exhaust pipe, and a gas conveying pipe extending into the spacing cavity is fixedly connected to the wall surface of the shell. The wall face of the inner container is provided with a separation structure for separating the separation cavity, the separation structure comprises separation bodies, the wall face of the inner container is fixedly connected with the multiple separation bodies, the separation bodies can better support the outer portion of the exhaust pipe, deformation of the exhaust pipe caused by temperature difference is restrained, the overall strength of the exhaust pipe is improved, and the anti-explosion performance is further improved. Meanwhile, the separation bodies can separate the separation cavity, and when the external nitrogen supply device stops gas supply or nitrogen in the separation cavity is exhausted, the separation bodies divide the separation cavity into a plurality of independent cavities, gas with pressure in the separation cavity can be prevented from being exhausted rapidly, and the air hammer effect is prevented from being generated.

The invention provides a composite carbon black material for artificial stone as well as a preparation method and application thereof, the composite carbon black material for artificial stone comprises the following raw materials in parts by weight: 10 parts of carbon black and 3 parts of a siloxane complexing agent, the moisture content of the composite carbon black material is less than 1%, and the particle size is less than or equal to 10 microns. The composite carbon black material for the artificial stone can be applied to production of quartz plates, and the composite carbon black accounts for 2-6% of the mass of the quartz plates. According to the composite carbon black material for the artificial stone as well as the preparation method and the application of the composite carbon black material, the compatibility with a quartzite base material can be enhanced, and the water absorption rate of a plate is reduced, so that the anti-knock performance and the waterproof and impermeable performance are improved.

The invention provides an auxiliary oil tank structure for a split type on-load tap-changer. The auxiliary oil tank structure comprises an auxiliary oil tank, reinforcing ribs, an oil chamber barrel and a pressure relief valve. The auxiliary oil tank comprises an oil tank body and a tank body top cover, and the tank body top cover is located above the oil tank body and fixed through bolts. The oil chamber barrel is located in the auxiliary oil tank and fixed to the tank body top cover through bolts. And the pressure relief valve is positioned above the oil chamber barrel. Compared with an existing split type on-load tap-changer auxiliary oil tank, the auxiliary oil tank has the advantages that the reinforcing rib structure of the auxiliary oil tank is optimized, the transverse and vertical reinforcing ribs, the right-angle base reinforcing ribs and the like are additionally arranged, the tensile strength and the bending strength of the auxiliary oil tank are effectively improved, deformation of a tank body shell in an arc fault can be reduced, and the anti-explosion performance of the auxiliary oil tank is improved.

The explosion-proof distribution box with the gas detection function comprises a machine body, a supporting piece, a ventilation piece and a fire extinguishing piece, the supporting piece is arranged in the machine body, the ventilation piece is arranged below the supporting piece, the fire extinguishing piece is arranged at the top of the supporting piece, and the fire extinguishing piece is arranged below the supporting piece. The ventilation part comprises a ventilation chamber, ventilation openings, a fan assembly, a drying agent chamber and a filter plate, the ventilation openings are formed in the left side and the right side of the ventilation chamber, the fan assembly is arranged at one ends of the ventilation openings, the drying agent chamber is arranged on the side of the fan assembly, and the filter plate is arranged above the ventilation chamber. According to the explosion-proof distribution box with the gas detection function, when heat is too high, air in the cabinet body circulates through the ventilation opening in the bottom, and when electric appliance elements are on fire due to too high heat, a temperature sensor detects temperature change and transmits data to a buzzing alarm assembly for alarming; and then, the air pump at the top sprays out dry powder in the dry powder box through a spray head to extinguish flames.

The pressure relief structure comprises an upper cover and a tank body, the upper cover is fixedly connected with a pressure relief device, a blocking plate is installed in the pressure relief device, the blocking plate is connected with a blocking frame in a sliding mode, the blocking frame is connected with a spring a in a surrounding mode, the blocking plate is provided with a telescopic pipe, the telescopic pipe is provided with a moving plate b, and the moving plate b is provided with a spring. A moving plate b is arranged in the tank body, the moving plate b is slidably connected with a sliding frame, the moving plate b is slidably connected with a sliding block, the sliding block is rotatably connected with a rotating plate, the rotating plate is rotatably connected with a moving plate a, the tank body comprises a shell, aerogel, reinforcing cloth, polyurethane, carbon fibers and an inner container, and the shell is located on the outer side of the aerogel. When the pressure in the tank body is high, the moving plate a and the moving plate b are pushed to move upwards in sequence until the sliding frame is attached to the blocking frame, the air outlet and the air hole are exposed, air can be released outwards for pressure relief, and the service life is long; the carbon fiber, the polyurethane, the reinforcing cloth and the aerogel are matched to achieve a good explosion-proof effect.

The utility model discloses an explosion-proof surge protection device, which relates to the technical field of surge protection devices and comprises a surge protection device body. A plurality of first bolts are installed at one end in the surge protection device body in a threaded mode, a second bolt is connected to one end, at the bottom of each first bolt, in the surge protection device body in a threaded mode, and a plurality of cables are inserted into the top of the surge protection device body. And one end of the surge protection device body at one end of each first bolt is slidably provided with a baffle plate through a fixing block. According to the utility model, the baffle plate, the fixing block, the partition plate and the connecting block are arranged to prevent the first bolt and the second bolt from falling off due to vibration or impact, and the limiting component and the clamping component are arranged to limit the baffle plate and the partition plate, so that firm and reliable connection between the cable and the surge protection device is ensured; and meanwhile, electric arcs and sparks generated due to poor contact can be reduced, so that an explosion-proof effect is achieved.

The utility model belongs to the technical field of system cabinets, and discloses a novel explosion-proof control system cabinet which comprises a rotating mechanism, the rotating mechanism comprises a square fixing block and a second bevel gear, a side door drives a limiting block to move, the limiting block drives a rotating rod to move, the rotating rod drives a face gear to move, and under the action of a hollow gear rack, the face gear is driven to rotate. When the side door is closed, the face gear rotates, the face gear drives a rotating rod to rotate, the rotating rod drives a first bevel gear to rotate, the first bevel gear drives a second bevel gear to rotate, when the side door is opened, the first bevel gear can be driven to rotate, and under the action of a limiting elastic piece, opening of the side door can be limited when the side door is closed. The side door opening power can drive the second bevel gear to rotate under the action of the hollow gear rack, opening of the side door can be limited under the action of the limiting elastic piece, the anti-explosion capacity of the system cabinet is improved, and meanwhile the service life of the system cabinet is prolonged.

The utility model provides a mining flame-proof and intrinsic safety type digital flame-proof box, and belongs to the field of flame-proof boxes. The problems that a digital belt scale host is heavy and poor in communication signal are solved. In order to solve the technical problem, the technical scheme adopted by the utility model is that the explosion-proof box comprises an intrinsic safety box body and an explosion-proof box body, the intrinsic safety box body is provided with a wire inlet nozzle, the explosion-proof box body comprises an explosion-proof main box body, the explosion-proof main box body is provided with an explosion-proof cover, a matching part of a flange and the explosion-proof cover forms an explosion-proof joint surface I, the explosion-proof cover is provided with a window and a plurality of first wiring terminals, and the first wiring terminals are connected with the explosion-proof joint surface I; a glass pressing plate is arranged on one side of the window through a sealing gasket, a red copper gasket is arranged on the other side of the window, a second explosion-proof joint face is formed at the matching position of the explosion-proof cover and the first wiring terminal, a third explosion-proof joint face is formed at the matching position of the window and the red copper gasket, and a fourth explosion-proof joint face is formed at the matching position of the red copper gasket and the explosion-proof cover. The wire inlet nozzle is connected with the first wiring terminal through a through-wall line; the utility model is applied to the belt weigher.

The utility model discloses a cable branch box with an explosion-proof function, which belongs to the technical field of cable branch boxes and comprises a box body, an explosion-proof cover is sleeved outside the box body in a sliding manner, the side end of the explosion-proof cover is fixedly connected with an elastic clamp, guide columns are clamped inside the elastic clamp and symmetrically arranged on the outer side of the box body, and the outer side of the box body is fixedly connected with the explosion-proof cover. A binding frame is fixedly connected to the lower portion of the box body, the lower ends of the guide columns are fixedly connected with the binding frame, the box body and the binding frame are matched with a bolt frame in a sliding and penetrating mode, the anti-explosion cover is pulled downwards, the lower portion of the anti-explosion cover is inserted into the inner side of the binding frame, then the bolt frame penetrates through the binding frame, the anti-explosion cover and the box body, and bolts are screwed into the binding frame. When the inside of the box body is exploded unfortunately, the explosion-proof cover is used for preventing explosion shock waves from diffusing, the binding frame is used for binding the lower portion of the explosion-proof cover, the stability of the structure of the lower portion of the explosion-proof cover is improved, and the explosion-proof capacity of the box body is improved.

The utility model relates to a tank type explosion-proof electric heater, which belongs to the technical field of electric heaters and comprises a heating tank body, a tubular electric heater main body, a first explosion-proof partition plate, a sealing tank cover, an electric heater cable and a high-temperature-resistant remote-transmission magnetic turning plate liquid level meter, and the heating tank body is provided with a second explosion-proof partition plate. According to the utility model, the U-shaped electric heating tube of the tubular electric heater main body is inserted into the heating tank cavity, the first anti-explosion partition plate and the second anti-explosion partition plate are connected, and the first anti-explosion partition plate and the second anti-explosion partition plate can be combined to separate the anti-explosion isolation cavity and the heating tank cavity, so that electric sparks can be physically isolated, and a steam permeation path can be blocked; the explosion propagation path is blocked through the cavity dividing design, nitrogen is introduced into the explosion-proof isolation cavity through the one-way air inlet valve, the junction box end and the wiring position of the tubular electric heater body can be sealed in the nitrogen inert environment, the inert environment eliminates the possibility of electric spark ignition, and the explosion risk caused by electric spark ignition is avoided. Therefore, the explosion-proof performance of the tank type electric heater can be further improved.

The invention relates to the technical field of anti-explosion storage tanks, in particular to a temporary hydrogen anti-explosion storage tank which comprises a shell, a first frame is fixedly connected to the upper end of the shell, unfolding mechanisms are arranged on the surfaces of the two ends of the shell, and pressure relief mechanisms are arranged at the ends, close to the unfolding mechanisms, of the two ends of the shell. A diluting mechanism is arranged on the surface of each shell, sealing cloth is fixedly connected to one end of each shell, the multiple shells are connected through carbon fiber rubber through the arranged structure, the shells can be folded, the multiple shells are unfolded to form included angles to relieve pressure of internal hydrogen, and meanwhile the sealing cloth can be unfolded to store hydrogen. Meanwhile, the multiple shells can play a warning role when being unfolded, the larger the unfolding angle of the multiple shells is, the larger the hydrogen pressure in the shells is, the arranged structure can automatically release pressure when the hydrogen pressure in the sealing cloth is too large when the shells are unfolded to a certain angle, and the hydrogen in the shells is automatically released into the outside air.

The utility model relates to an explosion-proof wire passing structure of an explosion-proof distribution box, which comprises two distribution modules and two through heads, each through head and a wire passing port are coaxially provided with a wire passing hole in a penetrating manner, and each through head comprises a first part which is positioned on the outer side of the distribution module and abuts against the other through head and a second part which extends into the distribution module through the wire passing port. The side wall of the power distribution module is provided with a mounting hole at the wire passing port, the periphery of the second part is in threaded fit with the mounting hole to form an explosion-proof thread, the wire passing hole sequentially comprises a large-diameter part and a small-diameter part in the direction from the second part to the first part, and a mounting step is formed at the joint of the large-diameter part and the small-diameter part. A connecting ring matched with the mounting step in a limiting mode is arranged in each large-diameter part, a plurality of screws are arranged between the two connecting rings in a penetrating mode, and nuts matched with the connecting rings in a limiting mode are arranged at the two ends of each screw respectively. By adopting the scheme, the utility model provides the explosion-proof wire passing structure of the explosion-proof distribution box, which has the advantages of reduced processing cost, improved processing efficiency, good explosion-proof performance and improved assembly convenience.

The utility model belongs to the technical field of pipeline anti-explosion, and particularly discloses a pipeline anti-explosion reinforcing structure for chemical safety production, which comprises an upper shell component and a lower shell component, the top of the lower shell component is fixedly connected with a fixing plate, the upper shell component is internally provided with a limiting groove extending to the outside of the upper shell component, and the fixing plate is fixedly connected with the fixing plate. According to the pipeline anti-explosion reinforcing structure for chemical safety production, a worker enables the rotating ring to rotate, the rotating ring drives the L-shaped fixing frame and the positioning rod to rotate, the L-shaped fixing frame and the positioning rod are driven to rotate, and therefore the pipeline anti-explosion reinforcing structure for chemical safety production can be used for fixing the pipeline through the L-shaped fixing frame and the positioning rod; and the L-shaped fixing frame slides out of the square frame, and the positioning rod slides out of the fixing groove, so that fixation of the first shell and the upper shell assembly can be relieved at the same time, and disassembly of the first shell and the second shell and disassembly of the upper shell assembly and the lower shell assembly are more convenient.

The utility model discloses a kind of explosion-proof machine case and power electronic equipment, including machine case main body and the machine cover of installation fixed in the top of machine case main body, a pair of side edge of machine cover is equipped with several first cover hole concave package, another pair of side edge of machine cover is equipped with several second cover hole difference concave package, first cover hole concave package is equipped with first concave package via hole, second cover hole difference concave package is equipped with second concave package difference via hole, the top ring surface of machine case main body is installed with several machine case main body connecting support piece corresponding with first cover hole concave package and second cover hole difference concave package respectively, second concave package difference via hole and first concave package via hole are all equipped with matching machine cover connecting piece.The utility model has the beneficial effect that: better explosion-proof effect can be realized, and for existing machine case and cover body change is smaller, appearance influence is small, improve the application range of explosion-proof machine case, reduce explosion-proof cost, compared with explosion-proof valve explosion-proof, its explosion-proof reliability is higher.

The utility model relates to the technical field of distribution boxes, in particular to an explosion-proof distribution box device with a double-sealing structure, which comprises a distribution box body. According to the explosion-proof distribution box device with the double-sealing structure, through the installation of the sealing assembly, when the box door of the distribution box body needs to be closed, a sealing strip on the back surface of the box door can be pushed into a sealing groove in a sealing plate, so that when the box door is closed, the sealing strip generates elastic deformation under the extrusion of the box door and the box body; meanwhile, the rubber strips in the sealing grooves have excellent weather resistance, chemical corrosion resistance and high elasticity and can keep stable performance for a long time, and when the box door is closed, the first metal sealing gasket on the back face of the box door can be attached to the second metal sealing gasket, so that the sealing performance of the box door is improved. The sealing mode utilizes the good conductivity of the metal material to conduct static electricity between the box door and the box body, so that the static electricity is prevented from being accumulated to generate electric sparks, and meanwhile, the blocking effect on flammable and explosive substances is further enhanced.

The utility model relates to the technical field of cables, and discloses a flexible mineral explosion-proof cable, which comprises a cable main body and a protective sleeve, a filling layer is arranged in the cable main body, a heat insulation layer is arranged on the outer wall of the filling layer, a first fireproof layer is arranged on the outer wall of the heat insulation layer, and a second fireproof layer is arranged on the outer wall of the first fireproof layer. A first fireproof layer is arranged on the inner wall of the protective sleeve, a plurality of flexible supporting blocks are arranged on the outer wall of the first fireproof layer, a second fireproof layer is arranged on the outer walls of the flexible supporting blocks, a wear-resistant layer is arranged on the outer wall of the second fireproof layer, contraction grooves are formed in the upper portion and the lower portion of the inner wall of the protective sleeve, and fastening arc-shaped plates are movably arranged in the two contraction grooves. According to the utility model, through the arrangement of the first fireproof layer and the second fireproof layer, fire spreading can be effectively prevented, good fireproof protection is provided, and through the arrangement of the flexible supporting blocks and the heat insulation layer, damage of external high temperature to the conductors in the cable main body can be effectively isolated.

The utility model discloses an indicating lamp mounting structure which is characterized by comprising a window sleeve, a sealing ring, explosion-proof glass, a pressing ring and an indicating lamp circuit board, the window sleeve is fixedly arranged on a box body or a box door of the power box in a penetrating manner; the window sleeve inner hole is provided with an outer hole section, a step surface and an inner hole section, and the inner diameter of the outer hole section is smaller than that of the inner hole section; the sealing ring and the explosion-proof glass are sequentially arranged in the inner hole section and are blocked by the step surface; the compression ring is fixedly connected with the inner end of the window sleeve and compresses the explosion-proof glass; the indicating lamp circuit board is fixed on the hold-down ring; an indicating lamp is arranged on one side, facing the explosion-proof glass, of the indicating lamp circuit board; and the indicating lamp is positioned in the pressing ring. The explosion-proof indicating lamp can solve the technical problem that an existing indicating lamp is installed on a power box and cannot meet the explosion-proof requirement. The utility model also discloses a power box.