45results about How to "To achieve the purpose of explosion-proof" patented technology

The present invention relates to an improvement on existent fibreglass reinforced plastics composite type pipeline structure and its preparation process. Said invented technological process includes four procedures of base pipe forming, end portion flange connection treatment, forced layer forming and surface decoration, and every procedure uses its correspondent thermosetting resin adhesive formula so as to make said pipeline possess the antistatic and fire-resisting effect.

The invention relates to an explosion-proof function switch, which belongs to the gate lamp switch as well as the switching element of the thermostat. It is composed of key-press, switch box body which contains the circuit switching installment, touch foot which connects the circuit and soft gum cover and the outer covering, the soft gum cover covers on the switch-box body and with the box body forms the cavity hold the key-press, the box body corresponds the aperture of the key-press located in the cavity, the outer covering nests on the soft gum cover which contacts the switch-box body, the soft gum cover hermetic connects the switch-box body, the touch foot hermetic connects the switch-box body, the air in the cavity and the switch-box body inner space is isolated with the air in the switch-box body exterior space. The explosion-proof function switch also can be the clarinet switch which is composed of the clarinet body and the touch foot of junction circuit. The explosion-proof function switch has low cost and easy to install and maintenance.

An explosion-proof control box comprises a control box body, a positive pressure system and a monitoring system, wherein multiple vent holes are distributed in the control box body; each vent hole is provided with a one-way valve; the positive pressure system comprises a gas pump and a gas storage tank storing an inert gas; the gas pump is connected with the gas storage tank for charging the gas to the control box body; the positive pressure system is arranged in the control box body; the monitoring system comprises a temperature detector, a pressure intensity detector and a controller; the temperature detector and the pressure intensity detector are connected with the controller; the controller is connected with the gas pump; the temperature detector is arranged outside the control box body; and the pressure intensity detector is arranged inside the control box body. By adopting positive pressure explosion protection, the high pressure gas fills the control box body, outer air can be prevented from entering the control box body, and in addition, the high pressure gas can be emitted out of the control box body, a gas protection layer is formed around the control box body, and the explosion-proof purpose is achieved. With such structural design, high safety during the use process can be ensured.

The invention discloses an alcohol precipitation tank and horizontal spiral centrifugal machine combined system which is mainly composed of an alcohol precipitation tank, a horizontal spiral centrifugal machine and a material conveying pipe. The alcohol precipitation tank and horizontal spiral centrifugal machine combined system is characterized in that the alcohol precipitation tank is detachably connected with the horizontal spiral centrifugal machine through the material conveying pipe; the position, close to the bottom of the alcohol precipitation tank, of the lower end of a stirring end is provided with a compressed gas spraying opening and is provide with a bottom stirring blade; meanwhile, the upper portion of the horizontal spiral centrifugal machine is provided with an inert gas input opening and a gas sampling opening; and the gas sampling opening is provided with an online gas oxygen detecting device. The alcohol precipitation tank and horizontal spiral centrifugal machine combined system is novel in design, reasonable in structure and convenient to operate, the traditional Chinese medicine extract producing rate can be increased by the adoption of the system, stability and controllability of preparation quality are facilitated, medicine liquid and ethyl alcohol in alcohol sediment are recycled through the improved horizontal spiral centrifugal machine, losses of solvents can be reduced, the resource utilization rate is increased, the production cost is reduced, the purpose of safe and efficient production is achieved, and a wide application and popularization prospect is achieved.

The invention relates to a process for preventing fogging and explosion of coal dried tail gas in dry bag-type dust removal process. The process comprises the following steps of: sucking high-dew-point and low-oxygen-content dust-containing dried tail gas which is exhausted from the tail of a drier into a bag-type dust remover by a draught fan for gas-solid separation; discharging separated dust which is deposited at the bottom of the bag-type dust remover by a star discharger; drawing purified carrier gas and water vapour to a safety place by the draught fan for exhausting; drawing a part ofthe tail gas from an outlet pipeline of the bag-type dust remover by a circulating fan; mixing a part of air which is heated by an air heater; and heating the air by using a circulating heater, and mixing into an outlet tail gas pipeline of the drier. The aim of preventing the fogging of the tail gas in the dried tail gas treatment process is fulfilled by cyclically heating the part of the tail gas and mixing a certain amount of hot air, the aim of preventing the explosion is fulfilled by controlling the content of oxygen in an outlet of the bag-type dust remover, and the fogging of the driedtail gas in the bag-type dust remover is prevented during explosion prevention.

The invention discloses an anti-explosion air conditioner and an explosion-proof control method of the anti-explosion air conditioner. A partition plate is arranged in a machine shell of a outdoor unit. The machine shell is divided into an air flue cavity and a sealed compressor cavity through the partition plate. An outdoor fan is arranged in the air flue cavity. A compressor and a refrigerant concentration sensor are arranged in the compressor cavity. A first channel capable of being opened and closed is arranged between the air flue cavity and the compressor cavity, and a second channel capable of being opened and closed is arranged between the compressor cavity and the external environment. The anti-explosion air conditioner is reasonable in structural design, low in cost investment and capable of monitoring the accidental leakage of the refrigerant in the air conditioner in real time, evacuation and discharging, and warning function are achieved, so that the use safety of a user is greatly improved.

The invention relates to a blast and vacuum prevention self-detaching safety valve for solar energy water heater, which belongs to the technical field of solar energy water heater. The invention comprises two column shaped pipelines, a round drum shaped pipeline positioned between a round pipeline at two ends and communicated with two round pipelines, as well as a spherical ball with less specific gravity than water being positioned inside the round drum shaped pipeline and can move inside the pipeline. Wherein, an upper end port in the round column shaped pipeline is configured as the overflow port or air inlet port or air outlet port for the safety valve; a lower end port in the round column shaped pipeline is configured as the water outlet port or air inlet port or air outlet port for the safety valve; a plurality of bordering gaps are made on the internal wall at the interface of the round column shaped pipeline connected with the round drum. Therefore, the invention, which can be applied to ensure the safe application of solar energy water heater, has the advantages of simple structure, low cost and easy realization.

The invention discloses a solar water heater with a rotating effect and relates to the technical field of solar water heaters. The solar water heater comprises a solar water heater body. A rotating support is fixedly installed at the bottom end of a supporting leg of the solar water heater body. A first sliding column body is fixedly installed at the bottom end of the front side of the solar waterheater. According to the solar water heater, a controller is arranged, thus whether illumination intensity sensed by a first light sensor and illumination intensity sensed by a second light sensor are the same or not can be judged, if yes, the controller controls an electromagnetic braking motor to drive the solar water heater body to rotate until the illumination intensity sensed by the first light sensor and the illumination intensity sensed by the second light sensor are different, when the illumination intensity sensed by the first light sensor and the illumination intensity sensed by thesecond light sensor are different, it shows that the second light sensor is stopped by the first light sensor, at the moment, sun light directly shines on the solar water heater body, at the moment,the illumination intensity received by the solar water heater is the strongest, and the light absorbed is the most.

The invention discloses an explosion-proof high-low voltage complete electrical cabinet which comprises a cabinet body, a switch assembly and a pressure relief assembly. The cabinet body comprises a vertically arranged side plate and a horizontally arranged top plate, electrical equipment is arranged in the cabinet body, the switch assembly comprises a switch cylinder, an elastic film, a contact switch, a contact and a connecting rod, the pressure relief assembly comprises a pressure relief cylinder, a rotating plate, a middle rod and a limiting mechanism, the limiting mechanism comprises a clamping cover, a clamping block, a sleeve, a first spring and a first electromagnet, raised air pressure and flames in the cabinet body are sprayed to the outside above through the pressure relief barrel, pressure is relieved in time, high-pressure gas and flame are exhausted above the cabinet body, so that impact on the horizontal surrounding environment of the cabinet body can be reduced, and theexplosion loss is reduced, impact on other parts of the cabinet body caused by explosion of the electrical cabinet can be reduced, and impact force generated by explosion can be reduced, therefore, damage of explosion to surrounding people or objects is reduced, and the purpose of explosion prevention is achieved.

The invention discloses a lithium ion battery, comprising an electrical core and a housing with an intracavity. The electrical core is arranged inside the intracavity. The housing comprises a cover plate including a first sheet metal, wherein the first sheet metal is equipped with at least a first through hole and a second through hole that are penetrating through an upper surface and a lower surface, and the first through hole is equipped with a cathode column therein, and an insulating part is arranged between the first through hole and the cathode column. The cover plate also includes an explosion-proof apparatus, which comprises a bursting disk sealing the second through hole; an explosion-proof wire is arranged on the bursting disk and will break to expel gas when an air pressure in the electrical core reaching a preset value. In a detailed implementation of the invention, the explosion-proof apparatus is arranged on the second through hole and comprises the bursting disk; the bursting disk seals the second through hole and is also equipped with an explosion-proof wire, so as to realize explosion proofing and avoid electrical core failure caused by impaling or breaking of the bursting disk due to thin film thickness or low mechanical strength during production, transportation and usage.

The invention relates to a double-trigger umbrella type oil and gas pipeline explosion-proof valve which comprises a valve body, a support, a valve rod guide rail, a valve rod set, an explosion-proof cover, a left mechanical response mechanism, a right mechanical response mechanism, a locking mechanism and a temperature sensing action mechanism. Valve diameter parts are arranged at the two ends of the valve body, and the valve rod guide rail is arranged between the left mechanical response mechanism and the right mechanical response mechanism. The valve rod guide rail is located in the valve body, the valve rod set surrounds the valve rod guide rail, and the valve rod set is externally wrapped by a layer of anti-explosion cover. The left mechanical response mechanism and the right mechanical response mechanism are centrally installed in the valve diameter parts at the two ends of the valve body through the supports respectively. When a pipeline is burnt or exploded, a limiting disc at one end of the device is unfixed and rapidly moves in the guide rail, the valve rod set is rapidly shrunk, and therefore a valve clack is in an opened posture. When the limiting disc moves to the limit distance, the limiting disc and another limiting disc are locked through a locking block and a locking cavity and cannot move continuously, at the moment, the valve clack is tightly attached to the inner wall of the valve body, flames or shock waves can be blocked, and the explosion-proof effect is achieved.

The invention provides a coal mine wastewater recycling system, relates to the technical field of coal mine wastewater treatment, and solves the technical problem that a membrane filtration technologyin the prior art cannot be suitable for an underground special environment of a coal mine. The coal mine wastewater recycling system comprises reclaimed water recycling equipment, a purified water tank, a jigging screen and a raw water tank. The purified water tank provides clean water for a drilling machine, underground wastewater enters the jigging screen, the jigging screen is located on the upstream of the raw water tank, and raw water passing through the jigging screen enters the raw water tank. The raw water tank is positioned at the upstream of the reclaimed water recycling equipment and is connected with the reclaimed water recycling equipment, the reclaimed water recycling equipment is connected with the purified water tank, and the purified water tank is connected with an underground coal mine clean water supply pipeline. Fine particle impurities and coal slime in the wastewater are removed by the jigging sieve and the raw water tank in a filtering and precipitating manner.Then, the wastewater is further filtered by utilizing the reclaimed water recycling equipment to realize purification of the coal mine wastewater. The purified clear water is used for underground operation, so that the cyclic utilization of coal mine wastewater is realized.

The invention discloses an aircraft fuel tank inerting system and a fuel tank explosion-proof method. The aircraft fuel tank inerting system comprises a heat exchanger arranged in a fuel tank, and theheat exchanger is connected with a heating system. The fuel tank explosion-proof method comprises the step of heating fuel so that a concentration of fuel steam in the fuel tank is higher than a combustible threshold value. In the invention, fuel in the fuel tank is heated so that concentration of the fuel steam in a gas-phase space on upper portion of the oil tank is increased and located outside combustible limit, and therefore an anti-explosion purpose is achieved; in addition, the temperature of the fuel in the fuel tank is high, preheating power of the fuel before the fuel enters an engine to be combusted can be reduced, and the system and the method are short in inerting time, free of environmental pollution, simple and controllable in system and the like.

The invention discloses a multifunctional paint for lamp tubes. The paint comprises following raw materials in parts by weight: 15 to 30 parts of nano glass resin, 10 to 30 parts of aqueous hydroxyl acrylic acid emulsion, 5 to 10 parts of amino resin, 1 to 5 parts of organic silicone powder, 1 to 5 parts of nano barium sulfate, 0.1 to 3 parts of light diffusion powder, 0.05 to 0.5 part of blue light absorbent, 0.05 to 0.5 part of natural camphor, 0.1 to 1 part of silicon whisker, 0.1 to 0.2 part of pH adjuster, 0.1 to 0.2 part of antifoaming agent, 2 to 5 parts of film forming agent, 0.3 to 0.5 part of dispersant, 0.3 to 0.5 part of base material wetting agent, 5 to 10 parts of deionized water, and 0.5 to 1.0 part of thickening agent. The invention also discloses a preparation method of the paint. The paint is aqueous, is applied to glass, is explosion-proof, is resistant to blue light, and can repel insects. By improving the wetting and leveling performance, the paint can be applied to glass, and the coating has good hardness.

The invention discloses an explosion-proof high and low voltage complete electrical cabinet, which comprises a cabinet body, a switch assembly and a pressure relief assembly; the cabinet body includes a vertically arranged side plate and a horizontally arranged top plate; the inside of the cabinet is used for arranging electrical equipment ; The switch assembly includes a switch cylinder, an elastic membrane, a contact switch, a contact and a connecting rod; the pressure relief assembly includes a pressure relief cylinder, a rotating plate, a middle rod and a limit mechanism; cover, clamping block, sleeve, first spring and first electromagnet; the rising air pressure and flame in the cabinet are sprayed out to the upper outside through the pressure relief cylinder, and the pressure is released in time; the high-pressure gas and flame are discharged to the inside of the cabinet. Above, it can also reduce the impact on the surrounding environment of the cabinet level and reduce the explosion loss; it can also reduce the impact on other parts of the cabinet caused by the explosion of the electrical cabinet, and reduce the impact force caused by the explosion; thus reducing The damage caused by the explosion to the surrounding people or objects, in order to achieve the purpose of explosion protection.

The invention relates to a hot welding plate of a thermofussion welding machine for an underground coal mine. A hot plate body is made from anti-explosion aluminum, an anti-explosion wiring cavity is formed in the upper part of the hot plate body, an anti-explosion cover body which is used for sealing the anti-explosion wiring cavity is arranged at the top end of the anti-explosion wiring cavity, the combining surface of the anti-explosion wiring cavity and the anti-explosion cover body is an anti-explosion surface, a conducting layer is arranged on the anti-explosion surface, arc extinguishing paint layers are respectively arranged on the inner surfaces of the anti-explosion wiring cavity and the anti-explosion cover body, a bracket is arranged in the anti-explosion wiring cavity, a plurality of binding posts which are connected with a resistance heating wire and a temperature sensor are arranged on the bracket, a grounding screw is arranged in the anti-explosion wiring cavity, two handles are respectively arranged on both sides of the hot plate body, and a plurality of sealed cable channels are communicated with the anti-explosion wiring cavity. The hot welding plate has the advantage of reasonable structural design, explosion suppression and prevention can be effectively realized, the sparking and arc phenomena of a terminal stud are prevented, and underground gas ignition caused by sparks generated by friction and striking of the hot plate body is avoided so as to avoid gas explosion.

The invention relates to a double-trigger umbrella type oil and gas pipeline explosion-proof valve, which includes a valve body, a bracket, a valve stem guide rail, a valve stem group, an explosion-proof cover, a left mechanical response mechanism, a right mechanical response mechanism, a locking mechanism, a sensor Warm action mechanism, the two ends of the valve body are the valve diameter, the valve stem guide rail is set between the left mechanical response mechanism and the right mechanical response mechanism, the valve stem guide rail is located in the valve body, the valve stem group is surrounded by the valve stem guide rail, and the valve stem group is outsourced A layer of explosion-proof cover; the left mechanical response mechanism and the right mechanical response mechanism are installed in the center of the valve diameter at both ends of the valve body through brackets. When the pipeline burns or explodes, the limiting plate at one end of the present invention is released and moves quickly in the guide rail, so that the valve stem group shrinks rapidly, so that the valve disc presents an open posture; when the limiting plate moves to the limit distance, It is locked with another limit plate through the lock block and the lock cavity, and cannot continue to move. At this time, the valve disc is close to the inner wall of the valve body, blocking flame or shock wave, and achieving the effect of flameproofing.

The invention relates to an explosion-proof structure of a capacitor. The structure comprises first and second connection boards arranged separately, and the first and second connection boards are connected via a fuse assembly formed by spot welding. The mechanical stretching type explosion-proof structure is used, two poles are led out via a group of spot-welding fuses, the stroke equals a deformation displacement of a body casing, when deformation of the casing reaches the predetermined amount, a copper sheet formed by spot welding is broken and form a normally open state, the capacitor is cut from the power grid, the explosion-proof purpose is achieved, and the problem that the service life of a product is short due to small current passing area in weak points, weak current passing capability and large heating amount is solved.

The invention discloses an explosion-proof locking mechanism for a temperature sensor element. The explosion-proof locking mechanism comprises a threaded sleeve, a telescopic spring, a locking sleeveand a threaded joint. A cavity is formed in the threaded sleeve, internal threads are arranged at one end of the threaded sleeve in the axial direction, and a baffle is arranged at the other end of the threaded sleeve. The telescopic spring is arranged between the threaded sleeve and the locking sleeve. At least one threaded hole is formed in the locking sleeve in the radial direction. The two ends of the screwed joint in the axial direction are provided with external threads, one end of the screwed joint is used for being connected with the threaded sleeve, and the other end of the screwed joint is used for being connected with a component with measured temperature. The explosion-proof locking mechanism for the temperature sensor element is a novel tool. In the actual use process, the failure rate of the armored temperature element is obviously reduced, the service life of the armored temperature element is prolonged, and meanwhile the explosion-proof locking mechanism is simple in structure, convenient to manufacture, easy to install, high in practicability and high in popularization value.

An explosion-proof disinfectant batching kettle capable of preventing smell from diffusing outwards comprises a kettle body, a first motor, a heating pipe, an infusion pump and a pressure gauge, the inner side of the upper right end of the kettle body is rotationally connected with a balance weight plate, the outer side of the left end of the balance weight plate is fixedly connected with a sealing gasket, and the inner side of the upper end of the kettle body is connected with a limiting rod in a clamped mode; and an output shaft of a second motor is connected to the right side of the limiting rod, a connecting block is connected to the outer side of the limiting rod in a penetrating mode, a bearing plate is rotatably connected to the outer side of the upper end of the movable plate, and a filter screen is connected into the lower end of the kettle body in a penetrating mode. The explosion-proof disinfectant batching kettle capable of preventing smell from dispersing outwards is convenient for corrosion prevention, long in service life, convenient for controlling the amount of water introduced into the kettle body, convenient for quickly filtering, heating and stirring a solution and powder added into the kettle body to quickly mix the solution and the powder, convenient for preventing explosion of the batching kettle and convenient for preventing odor from dispersing.

The invention relates to a cabinet door and a high-voltage switch cabinet. The cabinet door comprises a door panel which is provided with a detection window. Infrared light-transmitting glass is arranged in the detection window. The cabinet door further comprises a baffle which is arranged on the door panel, can move relative to the door panel and is provided with a first through hole which can bealigned and communicated with the detection window, and a dial plate which is movably arranged on the door panel and can dial the baffle. When the inside of the high-voltage switch cabinet needs to be monitored, the staff simply needs to dial the dial plate. When the dial plate is rotated, the baffle is synchronously dialed to move. The first through hole preset in the baffle can be aligned and communicated with the detection window. The temperature measuring probe of a temperature measuring device can be aligned with the infrared light-transmitting glass. With the excellent infrared light-transmitting performance of the infrared light-transmitting glass, infrared monitoring operation in the cabinet can be accurately performed, and potential safety hazards can be effectively eliminated. The cabinet door provided by the invention has the advantages of highly precise detection capability and excellent explosion-proof performance.

The invention provides an explosion-proof fuel gas pipeline. The explosion-proof fuel gas pipeline comprises a fuel gas conveying pipe and is characterized in that an inner cavity of the fuel gas conveying pipe is filled with a plurality of ventilating explosion-proof balls; the multiple explosion-proof balls are fixed into the fuel gas conveying pipe through brackets; and the explosion-proof balls are porous metal balls which are wound by aluminum alloy pieces or stainless steel pieces and are approximately spherical. The fuel gas conveying pipe is filled with the ventilating explosion-proof balls so that tempering can be prevented; meanwhile, the explosion-proof balls adopts the aluminum alloy pieces or stainless steel piece materials, heat conduction is fast, heat in the fuel gas pipe can be quickly transmitted out, and the effect of explosion prevention is achieved; and according to the wall effect and heat conduction theory, the explosion-proof fuel gas pipeline destroys the explosion forming condition, and the purpose of explosion prevention is achieved.

The invention discloses a button cell and a surface treatment process of a cap of the button cell, and relates to the technical field of microcells. The shell is provided with a bottom surface and a side wall extending around the edge of the bottom surface, the edge of the upper end of the shell is connected with a cap, and the cap comprises a connecting ring with a through hole in the middle and an electrode plate which is connected to the surface wall of the connecting ring through sealing insulation glue and used for covering the through hole. The connecting ring is welded with the edge of the upper end of the shell; an electrode assembly and electrolyte are arranged in the shell, one side of the electrode assembly is electrically connected to the inner wall of the shell through a conductor, and the other side of the electrode assembly is electrically connected with the electrode plate through a conductor. The button cell is simple and exquisite in structural design, low in manufacturing cost, capable of improving the capacity and specific energy density of the button cell, good in sealing performance, anti-explosion performance and corrosion resistance, long in storage time and long in service life.

A fire-proof and explosion-proof centrifugal fan comprises an impeller and a casing; a grille mechanism for blocking solid particles is arranged on the casing and comprises a fixing ring as well as an inner-layer reticular grille and an outer-layer fire-proof grille which are arranged inside the fixing ring; the grille mechanism is detachably connected with the casing; and an explosion-proof plate is arranged inside the casing of a fan body. Compared with the prior art, the fan has the remarkable advantages and beneficial effects as follows: the double-layer grille mechanism prevents the hard solid particles contained in gas from entering the fan from the source, and sector-shaped blades of the fire-proof grille can effectively block partial solid particles and prevent sparks produced due to the fact that the solid particles collide with the casing under the effect of the centrifugal force of the impeller, so that the explosion-proof purpose is achieved; and meanwhile, a fixator can be driven by a fusing screw to rotate, thus, the blades are expanded to form a sealed round section, the isolation effect is realized, and the fire-proof purpose is achieved.

The invention provides an explosion-proof lamp comprising an upper shell, a lower shell cooperating with the upper shell, a driver and a lamp tube are arranged in the lower shell, the lamp tube is electrically connected to the driver, and the locking device is locked. The switch mechanism of the upper shell and the lower shell. The switch mechanism includes multiple sets of rotating assemblies rotatably arranged on the first side of the lower case, and multiple sets of locking assemblies arranged on the second side of the lower case. The explosion-proof lamp also includes a sealing assembly, which is used for sealing the upper shell and the lower shell. The above-mentioned explosion-proof lamp uses a sealing component to seal the upper case and the lower case, and cooperates with the rotating component and the locking component to lock the upper case and the lower case. At this time, the gap between the upper shell and the lower shell is very small, which can limit the explosive gas, steam or mist from entering the interior of the lamp body to achieve the purpose of explosion protection. When the locking component is released, the upper shell can rotate around the rotating component, which facilitates the opening of the lamp, and the operation is simple and economical.

The invention discloses a novel mother-child tire. A wheel inner hub is included. An outer tire wall is arranged on an outer side of the wheel inner hub; and an anti-explosion sub-tire is arranged between an inner portion of the outer tire wall and the outer side of the wheel inner hub, one side of the anti-explosion sub-tire is connected with a one-way valve, one end of the one-way valve is connected with an inflation air guide pipe, an air pressure sensor is arranged in the inflation air guide pipe, and the inner side of the inflation air guide pipe is connected with a small inflation pump.A defect that in the prior art, in a running process of an automobile, especially in a high-speed running process, a tire burst situation suddenly occurs is effectively overcome.

An explosion-proof safety valve for a lithium battery, comprising a valve body (2), a filter (1) that allows gas to pass through but not liquid, a rubber cover (3) that is resistant to electrolyte corrosion, a cover (4), and a rubber sleeve The cover (3) is an inverted cylinder-shaped structure with a top-capped longitudinal section in the shape of "冂". The bottom of the valve body (2) is open, and an annular bead (21) protrudes upward in the valve inner chamber (22). The inner cavity (23) of the protruding ring (21) runs through up and down, and the lithium battery explosion-proof safety valve also includes an annular pressure ring (5), an annular pressure ring (5), a filter disc (1), and a rubber cover (3) from top to bottom The bottom is placed in the inner cavity (22) of the valve in turn, the rubber cover (3) is buckled and arranged on the annular bead (21), the cover (4) is covered on the top surface of the valve body (2), and the cover ( 4) There is a ventilation gap (41) between the bottom surface and the top surface of the valve body (2) for the valve inner cavity (22) to communicate with the outside world, and the filter (1) is provided with a groove that can be broken through if the air pressure is higher than the set value bottom annular groove (11). Its advantages are: sensitive response to pressure, high adaptability and good explosion-proof effect.

The invention relates to a filtering capacitor equipped with an explosion-proof apparatus. The filtering capacitor comprises a shell, a capacitor core group, a cover board, a first electrode electrically connected with the capacitor core group, a second electrode electrically connected with the capacitor core group, insulating oil and the explosion-proof apparatus, wherein the explosion-proof apparatus comprises a pressure switch and an alternating current contactor; a drainage tube is arranged at the bottom of the pressure switch; a downwardly convex film sheet is arranged at the bottom of the drainage tube; the alternating current contactor comprises a coil, a first contact switch and a second contact switch; the circuit where the coil is located is connected with the circuit where the pressure switch is located in series; the circuit where the first contact switch is located is connected with the first electrode in series; and the circuit where the second contact switch is located is connected with the second electrode in series. The filtering capacitor equipped with the explosion-proof apparatus is simple to overhaul and troubleshoot, convenient to use, good in explosion-proof effect, high in safety, and high in application value.

The invention relates to a process for preventing fogging and explosion of coal dried tail gas in dry bag-type dust removal process. The process comprises the following steps of: sucking high-dew-point and low-oxygen-content dust-containing dried tail gas which is exhausted from the tail of a drier into a bag-type dust remover by a draught fan for gas-solid separation; discharging separated dust which is deposited at the bottom of the bag-type dust remover by a star discharger; drawing purified carrier gas and water vapour to a safety place by the draught fan for exhausting; drawing a part ofthe tail gas from an outlet pipeline of the bag-type dust remover by a circulating fan; mixing a part of air which is heated by an air heater; and heating the air by using a circulating heater, and mixing into an outlet tail gas pipeline of the drier. The aim of preventing the fogging of the tail gas in the dried tail gas treatment process is fulfilled by cyclically heating the part of the tail gas and mixing a certain amount of hot air, the aim of preventing the explosion is fulfilled by controlling the content of oxygen in an outlet of the bag-type dust remover, and the fogging of the driedtail gas in the bag-type dust remover is prevented during explosion prevention.