36results about How to "Reduce leakage area" patented technology

The invention relates to a stroke differential type high-energy hydraulic drive down-hole hammer. A spline on a drill bit is in sliding fit with a spline groove, a valve cover sleeve is in interference fit with a valve sleeve to be installed into the upper end of the valve sleeve. A valve cover is inserted into a cylinder body upper end hole and is radially provided with low-pressure emptying channels, hole channels corresponding to the radial channels are radially formed in the radial direction of a cylinder body and are communicated with axial hole channels. The upper portion of the high-energy hydraulic drive down-hole hammer is in threaded connection with an outer cylinder through an upper connector and a middle connector respectively to form a whole through package. The axial size of a piston of the hammer is small, matching surfaces are few, the leakage area is greatly decreased, and the hammer is easy to assemble, not prone to abrasion, long in service life and high in sensitivity. A differential loop is adopted for a stroke, so that the piston quickly obtains large impact end speed within a shorter stroke, and the hard rock drilling efficiency is remarkably improved. The hammer is provided with a novel empty hammering preventing mechanism, high-pressure slurry flows into a cavity through the channels and then flows into the bottom of a hole, the hammer is not driven, it is ensured that the down-hole hammer does not work when a drilling tool is lifted to be away from the down-hole hammer, and accordingly the safety of the drilling tool is ensured.

The present invention provides a control circuit for a display panel, a driving method of a display panel, and a display device. The control circuit for the display panel is used for controlling the display panel, wherein the display panel includes shielding electrodes, gate lines and a gate driving circuit, wherein corresponding shielding electrodes are arranged above a row of gate lines and are used for blocking the gate lines; the control circuit for the display panel includes a shielding electrode control unit; the shielding electrodes are connected with a common electrode through the shielding electrode control unit; and the shielding electrode control unit is used for controlling the corresponding the shielding electrodes to be in floating states when the gate lines are switched on. With the control circuit of the invention adopted, time required by the gate signals lines to perform charging and discharging can be effectively decreased, and the charging time of pixels can be ensured, electric leakage areas can be reduced, and the high-aperture ratio frame of the pixels can be ensured.

Provided is a combined piston ring having an excellent gas seal characteristic and comprising a special gap effective for countermeasures against blow-by, wherein a combustion chamber-side side surface is not locally deformed nor melted even when receiving combustion gas from the combustion chamber side. To this end, a combined piston ring comprises a piston ring body which is produced from a high-strength heat-resistant resin and has a gap part having a step shape when viewed from the upper and lower surfaces and the outer peripheral surface, and a spring which is mounted to the inner peripheral part of the piston ring body and presses the piston ring body radially outward, and the combustion chamber-side side surface of at least the piston ring body is coated with a heat-resistant film.

The invention discloses an internal injection replacement support room type coal pillar recovery method. In the process of room type coal pillar recovery, room type coal pillars with an aspect ratio greater than 0.6 are divided into reserved coal pillars and pre-mining coal pillars, after the mining of the pre-mining coal pillars, cement filling materials are injected into goafs surrounded by thereserved coal pillars, after the goafs are stabilized, the coal pillars are replaced with the goafs for supporting, and the reserved coal pillars are recovered; and based on the Winkel beam theory, amechanical model of the reserved coal pillars in the stage of supporting overlying strata is established, and the displacement and force conditions of roofs of the reserved coal pillars in the supportstage are obtained. According to the first strength theory of the roofs and the criterion of the ultimate strength of the reserved coal pillars, the theoretical setting width of the reserved coal pillars is obtained. The internal injection replacement support room type coal pillar recovery method can not only efficiently recover valuable coal resources and reduce waste of the coal resources, butalso can effectively support the overlying strata and prevent a series of mine safety problems.

The invention is a smoke insulating damper-throttle relating to a insulating block used for smoke switch and insulation in smoke desulphurizing system, it can realize insulation to smoke with simple and reliable structure, the throttle includes a valve of a closed structure valve board with a sealed cavity, a middle media control switching valve, a electric executing mechanism; the electric executing mechanism, the middle media control switching valve are at two sides of the valve, the self-closed structure valve board with sealed cavity is in the valve, one end is connected to the outer electric executing mechanism, another end is connected to the outer middle media control switching valve, the middle media control switching valve and the hollow part of the self-closed structure valve board are connected; the valve board can be driven by the electric executing mechanism to rotate 90 degrees, at the same time, it drives the middle media control switch valve to rotate 90 degrees. It integrates the middle media control switch system and the valve board control, it guarantees the safety and reliability of the seal.

The embodiment of the invention provides a display panel and a preparation method of the display panel. The display panel comprises an array substrate, a pixel definition layer and a first carrier layer; the pixel definition layer is located on the array substrate; the pixel definition layer comprises a plurality of pixel openings distributed in an array mode; the pixel openings comprise a first opening close to one side of the array substrate and a second opening far away from one side of the array substrate; the first carrier layer is arranged on the side, deviating from the array substrate,of the pixel definition layer; a plurality of breaking parts are arranged on the first carrier layer; the minimum distance between the orthographic projection of the breaking parts on the array substrate and the orthographic projection of the first openings on the array substrate is a first distance L1, and meets the following condition that: L1 is larger than 0 and smaller than or equal to 2 microns. According to the display panel and the preparation method of the display panel of the invention, a conductive path between at least part of adjacent light-emitting elements can be blocked, and the display effect of the display panel is improved.

The invention discloses a water-saving anti-blocking water pump, comprising a water pump housing and a main water pipe installed in the water pump housing; one end of the water pump housing is provided with a lifting handle, and the other end of the water pump housing is connected with water inlet pipes; water absorption pump heads are installed at the other ends of the water inlet pipes; the cylinder surface of the water pump housing is connected with a plurality of water outlet pipes; the ends, fixed in the water pump housing, of the water inlet pipes are connected with the main water pipe; the ends, fixed in the water pump housing, of the water outlet pipes are connected with the main water pipe; the main water pipe sleeves a filter cartridge, and the filter cartridge is fitted between the main water pipe and the water outlet pipes; movable hoops sleeve the other ends of the water outlet pipes, recycling pipes are connected with the movable hoops, and the other ends of the recycling pipes are connected with the water inlet pipes. The water-saving anti-blocking water pump effectively solves the problem of impurity blockage by means of multilayer filtering; furthermore, the recycling pipes are installed at the connection parts of the water outlet pipes and the water inlet pipes, so that the large-area leakage of water is prevented, and the aims of reducing water resource waste and increasing water pumping efficiency are further achieved.

The invention provides a fiber enhanced type wet paving / pre-paving waterproof coil material and a special construction method of the fiber enhanced type wet paving / pre-paving waterproof coil material for water prevention of an underground engineering bottom plate. The waterproof coil material comprises a fiber enhancing layer, an upper adhesive layer, a tread layer, a lower adhesive layer and an isolating membrane. The construction method comprises the following steps: (1) constructing a concrete cushion layer of the underground engineering bottom plate; (2) wetly paving a fiber enhanced type wet paving / pre-paving waterproof coil material; and (3) bundling bottom plate structure steel bars on the fiber enhancing layer and pouring bottom plate structure concrete. According to the fiber enhanced type wet paving / pre-paving waterproof coil material and the construction method, wet paving and pre-paving construction manners in a waterproof coil material construction process are combined together; a waterproof structure is simple, and waterproof and safe dual guarantees are realized; and the probability of water leakage is effectively reduced.

The invention discloses an online minor repair method for 300 / 380KA large-scale prebake cells. The method comprises the following steps of: when lining damage or red furnace or furnace leakage occursat the side part of a prebake cell, pulling out an anode carbon block at a leakage point in time without stopping the cell; encircling the periphery of the leakage point by molten aluminum and liquidelectrolyte through a mixture of electrolyte and aluminum oxide; cooling the outer side of the cell shell leakage point of the prebake cell via blowing by using compressed air; when the temperature islower than 150 DEG C, starting to clean the inner side of the leakage point to ensure that the bottom is flat and the vertical face is straight; cleaning the residual materials, cooling via blowing by using compressed air, when the temperature is reduced to 100 DEG C, paving a thickener and carrying out compaction, constructing an anode carbon block at the top of the thickener, and tamping aluminum oxide between the lateral anode carbon block and the cell shell; after the repair, carrying out baking for 24, and mounting the pulled anode carbon block. According to the method, rapid repair is carried out in a shortest time without stopping the cell, so that large-area molten aluminum leakage caused by untimely processing is prevented from thrusting buses around the cell and then influencingthe safe operation of electrolytic series.

The invention discloses a pneumatic elastic sealing device and a gas turbine engine. The pneumatic elastic sealing device comprises a first outer ring, a second outer ring, a positioning component anda sealing component. The first outer ring and the second outer ring are arranged oppositely, and an accommodating cavity is formed between the first outer ring and the second outer ring. The first outer ring is provided with an annular boss. The second outer ring is provided with an annular limiting groove. The positioning component is arranged on the second outer ring, extends towards the firstouter ring in the axial direction of the second outer ring and is at least partially located in the accommodating space, and the portion, located in the accommodating space, of the positioning component is called a guide section. The sealing component is arranged on the guide section. The gas turbine engine comprises the pneumatic elastic sealing device. According to the pneumatic elastic sealingdevice and the gas turbine engine, two layers of sealing pieces are connected in series, and fan-shaped notches of the two layers of sealing pieces are arranged in a staggered mode, so that the leakage area is greatly reduced, the sealing efficiency is improved, and installation is convenient.

The invention discloses an explosion-proof valve capable of rotating by 360 degrees. The explosion-proof valve comprises a valve body, a water inlet, a water outlet, a control valve element and a water channel. The valve body is divided into a first valve body part, a second valve body part and a third valve body part. The first valve body part is provided with a containing cavity. The containing cavity is provided with a first opening and a second opening in the axial direction of the first valve body part. The control valve element is inserted into the containing cavity through the first opening and closes the first opening. The containing cavity is provided with a third opening in the radial direction of the first valve body part. The second opening and the third opening are controlled to be connected or disconnected through the control valve element. The second valve body part is arranged on a first sealing ring and a second sealing ring of the first valve body part in a sleeving mode through a first through hole so that the second valve body part can rotate by 360 degrees relative to the first valve body part and the third valve body part. The third valve body part is fixedly connected with a first connecting section through a second connecting section. The explosion-proof valve has the characteristics of convenient mounting and better performance guarantee.

The invention provides a fiber enhanced type wet paving / pre-paving waterproof coil material and a special construction method of the fiber enhanced type wet paving / pre-paving waterproof coil material for water prevention of an underground engineering bottom plate. The waterproof coil material comprises a fiber enhancing layer, an upper adhesive layer, a tread layer, a lower adhesive layer and an isolating membrane. The construction method comprises the following steps: (1) constructing a concrete cushion layer of the underground engineering bottom plate; (2) wetly paving a fiber enhanced type wet paving / pre-paving waterproof coil material; and (3) bundling bottom plate structure steel bars on the fiber enhancing layer and pouring bottom plate structure concrete. According to the fiber enhanced type wet paving / pre-paving waterproof coil material and the construction method, wet paving and pre-paving construction manners in a waterproof coil material construction process are combined together; a waterproof structure is simple, and waterproof and safe dual guarantees are realized; and the probability of water leakage is effectively reduced.

The invention relates to a Schottky diode structure for reducing a reverse leakage current by utilizing a generated depletion area, provided with a first conductive material semiconductor substrate and a metal layer combined with the same. The combined periphery of the first conductive material semiconductor and the metal layer is provided with an oxide layer, wherein a plurality of linearly arranged second conductive material areas are formed in the surface of the first conductive material semiconductor substrate, adjacent to the metal layer, and the second conductive material regions can form a depletion area in the first conductive material semiconductor substrate so that the depletion area can reduce the electric leakage area of a Schottky diode and further decrease the reverse leakage current and the forward voltage drop of the Schottky diode. When the first conductive material is a P-type semiconductor, a second conductive material is an N-type semiconductor; and on the contrary, and when the first conductive material is a N-type semiconductor, the second conductive material is a P-type semiconductor.

The invention discloses an SCARA robot. The SCARA robot comprises a first rotary arm and a base. The upper portion of the right side of the firs rotary arm is connected with the base through a first driving device. A protection plate is arranged on the base. A first inserting pipe connector and a plurality of cable connectors are installed on the protection plate. A second rotary arm is connected to the upper portion of the left side of the first rotary arm through a second driving device. A ball screw is connected to the second rotary arm through a third driving device, and a lower protection cover is arranged at the joint between the second rotary arm and the ball screw. A transition plate is fixedly connected to the second rotary arm and provided with a second inserting pipe connector. An upper protection cover is connected to the transition plate. A corrugated pipe is connected between the transition plate and the base. According to the SCARA robot, the requirements of an SCARA for the installing environment can be effectively lowered, quick switching of a top hanging type installing mode and a side wall type installing mode of the SCARA robot can be easily achieved, and the application range of the same robot is broadened.

The invention provides a landfill type biogas generator, which belongs to the field of comprehensive utilization of agricultural wastes. The landfill type biogas generator is embedded in a soil layer,and comprises a barrel body and a barrel cover covering the barrel body, wherein an annular connecting seat is screwed into the barrel body, a rotating shaft is vertically arranged in the barrel body, the connecting seat sleeves the rotating shaft which is hollow, the upper end and the lower end of the rotating shaft are open and closed, respectively, the rotating shaft is rotatably connected with the barrel body through a bearing, a groove is formed in the bottom wall of the barrel body, the lower end of the rotating shaft extends out of the barrel body and is located in the groove, a gear motor is fixed in the groove and can drive the rotating shaft to rotate through a transmission mechanism, a seal is formed between the rotating shaft and the connecting seat through a sealing ring, anair inlet hole is formed in the side wall of the rotating shaft in a penetrating manner and is located below the connecting seat, the top of the barrel cover extends upward to form a straight tubularexhaust part, the upper end of the exhaust part protrudes out of the soil layer and is connected to a valve, and the lower end of the rotating shaft is fixedly provided and sleeved with an annular stirring blade. The landfill type biogas generator has the advantage of good safety.

The invention aims at discloses an online repair method of a large pre-baking tank. Compared with the prior art, during runout of an electrolytic tank, an anode carbon block on the leaking tank portion is rapidly pulled out, an electrolyte and aluminum oxide are mixed to isolate the area, a mixture is tamped, and molten aluminum and the electrolyte are prevented from leaking out; rapid repair canbe achieved within the shortest time under the condition of production without shutting down the tank, and the situation that the molten aluminum leaks by a large area, the generatrix around the tankis cut off, and safety operation of series electrolytic tanks is influenced is avoided; and construction is simple, operation is easy, the repair cost is saved, and the aim of the method is achieved.

The invention relates to a novel heat preservation system of a heat preservation tank car. The novel heat preservation system comprises a tank body heat preservation structure camped between an innertank body and an outer tank body, and a secondary heat preservation structure connected with the tank body heat preservation structure. The novel heat preservation system is technically characterizedin that the secondary heat preservation structure is composed of a tank body end socket secondary heat preservation structure, a tank body V-shaped beam secondary heat preservation structure, a tank body traction disc secondary heat preservation structure and a tank body heat insulation structure located on a tank body metal connector. The novel heat preservation system effectively solves the problem that heat is leaked out of a tank body of an existing heat preservation tank car, heat conduction is effectively blocked, the heat leakage rate is reduced, and therefore the heat preservation effect of the tank body is guaranteed. Meanwhile, on the premise of guaranteeing the heat preservation effect, the weight of the tank body end socket heat preservation structure is reduced, the productiondifficulty is reduced, and production cost is reduced.

The invention relates to a hazardous waste salt pyrolysis system and a pyrolysis process thereof, the hazardous waste salt pyrolysis system is used for removing organic impurities in hazardous waste salt, the pyrolysis system comprises a drying reactor (1), a crusher (2), a pyrolysis reactor (3), a cyclone dust collector (4), a spray tower (5), a demister (6), an incinerator (7) and a heat exchanger (8); a solid outlet of the drying reactor is connected with a solid inlet of the pyrolysis reactor through the crusher, and a gas outlet of the drying reactor is connected with a first inlet of the cyclone dust collector; the pyrolysis salt outlet (322) is connected with an inorganic matter impurity removal system (9), the pyrolysis gas outlet (321) is connected with a second inlet of the cyclone dust collector, and the heating flue gas outlet (302) is connected with a gas inlet of the drying reactor; an outlet of the cyclone dust collector is connected with an inlet of the heat exchanger through the spray tower, the demister and the incinerator, a flue gas outlet of the heat exchanger is connected with a heated flue gas inlet (303) of the pyrolysis reactor, and a steam outlet of the heat exchanger is connected with the inorganic matter impurity removal system.

According to the rotor end face tooth profile of the high-temperature-resistant double-screw machine, the outer circle diameter of a female rotor is smaller than the pitch circle diameter of the female rotor, and rack profiles of the end face tooth profiles of the female rotor and the male rotor are formed by smoothly connecting seven sections of curves end to end. The tooth curve of each tooth type of the end face of the female rotor comprises a curve segment A2B2, an arc segment B2C2, a curve segment C2D2, a curve segment D2E2, a curve segment E2F2, an arc segment F2G2 and an arc segment G2H2 which are connected in sequence. The tooth curve of each tooth type of the end face of the male rotor comprises a curve segment A1B1, a curve segment B1C1, a curve segment C1D1, an arc segment D1E1, a curve segment E1F1, a curve segment F1G1 and an arc segment G1H1. A small gap is reserved between the female rotor and the male rotor adopting the rotor end face tooth profile, when the expansion allowance reaches the critical value at the high temperature, the collision position is small, jamming is avoided, a section of small gap can be formed in a running-in mode, and the tooth profile is not provided with cross points and is smoother.

The present invention provides a control circuit for a display panel, a driving method of a display panel, and a display device. The control circuit for the display panel is used for controlling the display panel, wherein the display panel includes shielding electrodes, gate lines and a gate driving circuit, wherein corresponding shielding electrodes are arranged above a row of gate lines and are used for blocking the gate lines; the control circuit for the display panel includes a shielding electrode control unit; the shielding electrodes are connected with a common electrode through the shielding electrode control unit; and the shielding electrode control unit is used for controlling the corresponding the shielding electrodes to be in floating states when the gate lines are switched on. With the control circuit of the invention adopted, time required by the gate signals lines to perform charging and discharging can be effectively decreased, and the charging time of pixels can be ensured, electric leakage areas can be reduced, and the high-aperture ratio frame of the pixels can be ensured.

The invention relates to a novel heat preservation system of a heat preservation tank car. The novel heat preservation system comprises a tank body heat preservation structure camped between an innertank body and an outer tank body, and a secondary heat preservation structure connected with the tank body heat preservation structure. The novel heat preservation system is technically characterizedin that the secondary heat preservation structure is composed of a tank body end socket secondary heat preservation structure, a tank body V-shaped beam secondary heat preservation structure, a tank body traction disc secondary heat preservation structure and a tank body heat insulation structure located on a tank body metal connector. The novel heat preservation system effectively solves the problem that heat is leaked out of a tank body of an existing heat preservation tank car, heat conduction is effectively blocked, the heat leakage rate is reduced, and therefore the heat preservation effect of the tank body is guaranteed. Meanwhile, on the premise of guaranteeing the heat preservation effect, the weight of the tank body end socket heat preservation structure is reduced, the productiondifficulty is reduced, and production cost is reduced.

The invention provides application of thrombospondin 1 (THBS-1) in preparation of a medicine for preventing and / or treating age-related macular degeneration (AMD), and belongs to the technical field of eye disease medicines. As the pathological process of the AMD comprises injury and death of retinal pigment epithelium (RPE), formation of choroidal neovascularization (CNV) and retinal inflammation, in-vitro cell experiments and in-vivo animal experiments are combined to verify the anti-inflammatory effect of the THBS-1 in experimental blue light induced retinal inflammation and verify the effect of the THBS-1 in inhibition of pathological neovascularization and the protection effect of retinal injury. Therefore, the invention provides the application of the THBS-1 in preparation of the medicine for preventing and / or treating the AMD.

The invention relates to the technical field of accessory devices of safety valves, in particular to a remote electromagnetic emergency cut-off device. The remote electromagnetic emergency cut-off device can realize a remote emergency cut-off function, is lower in cost and more convenient to manage. The remote electromagnetic emergency cut-off device includes a crane pipe, a connecting pipe and adischarge pipe, a first on-off valve is arranged at the input end of the crane pipe, the output end of the connecting pipe communicates with the input end of the first on-off valve, and the output endof the discharge pipe communicates with the input end of the connecting pipe. The remote electromagnetic emergency cut-off device further includes a hydraulic valve, a hand oil pump, a communicatingpipe, an electromagnetic valve and a hand-held remote control. The hand oil pump is provided with a rocker, the hydraulic valve is fixedly arranged on the connecting pipe, the hydraulic valve is provided with an oil delivery pipe, the output end of the hand oil pump communicates with the input end of the electromagnetic valve, the output end of the electromagnetic valve communicates with the inputend of the communicating pipe, the output end of the communicating pipe communicates with the input end of the oil delivery pipe, and the hand-held remote control is connected with the electromagnetic valve through an electrical signal.

The present invention provides a composite durable antistatic non-asphalt-based self-adhesive gas insulation board and its preparation method, which solves the problem that the gas insulation board in the prior art is a hard plastic board due to long-term high and low temperature changes in the use environment. It has the phenomenon of dimensional change, which leads to the technical problem of gas leakage. It includes a polymer waterproof board layer, a self-adhesive material layer and a polyurethane coating layer; the polymer waterproof board layer is the bottom layer, the self-adhesive material layer is covered on the polymer waterproof board layer, and the polyurethane The paint layer is the surface layer. The invention forms a composite weather-resistant and antistatic non-asphalt-based self-adhesive gas isolation board for gas tunnels through the compounding of polymer waterproof board layer, self-adhesive rubber material layer and polyurethane coating layer, thereby effectively preparing an excellent Mechanical properties, good flexibility, weather resistance, excellent gas insulation performance, excellent flame retardancy and antistatic properties, and easy construction and transportation of gas insulation panels.

The invention provides a composite durable antistatic non-asphalt-based self-adhesive gas isolation plate and a preparation method thereof, and solves the technical problems that a gas isolation platein the prior art is a hard plastic plate, the size of the gas isolation plate is changed due to long-time high and low temperature changes in a use environment, and gas leakage happens. The gas isolation plate comprises a polymer waterproof board layer, a self-adhesive material layer and a polyurethane coating layer, wherein the polymer waterproof plate layer is the bottom layer, the self-adhesive material layer covers the polymer waterproof plate layer, and the polyurethane coating layer is the surface layer. The polymer waterproof plate layer, the self-adhesive material layer and the polyurethane coating layer are compounded to form the composite weather-resistant antistatic non-asphalt-based self-adhesive gas isolation plate for a gas tunnel, and the gas isolation plate, which is excellent in mechanical property, good in flexibility and weather resistance, excellent in gas isolation performance, excellent in flame retardance and antistatic property and convenient to construct and transport, is effectively prepared.

The invention relates to a stroke differential type high-energy hydraulic drive down-hole hammer. A spline on a drill bit is in sliding fit with a spline groove, a valve cover sleeve is in interference fit with a valve sleeve to be installed into the upper end of the valve sleeve. A valve cover is inserted into a cylinder body upper end hole and is radially provided with low-pressure emptying channels, hole channels corresponding to the radial channels are radially formed in the radial direction of a cylinder body and are communicated with axial hole channels. The upper portion of the high-energy hydraulic drive down-hole hammer is in threaded connection with an outer cylinder through an upper connector and a middle connector respectively to form a whole through package. The axial size of a piston of the hammer is small, matching surfaces are few, the leakage area is greatly decreased, and the hammer is easy to assemble, not prone to abrasion, long in service life and high in sensitivity. A differential loop is adopted for a stroke, so that the piston quickly obtains large impact end speed within a shorter stroke, and the hard rock drilling efficiency is remarkably improved. The hammer is provided with a novel empty hammering preventing mechanism, high-pressure slurry flows into a cavity through the channels and then flows into the bottom of a hole, the hammer is not driven, it is ensured that the down-hole hammer does not work when a drilling tool is lifted to be away from the down-hole hammer, and accordingly the safety of the drilling tool is ensured.

The invention relates to a leakage test method of a polymerization kettle, and belongs to the technical field of chemical production. The leakage test method comprises the following steps ofS1, addinga monomer with the boiling point being -80 DEG C to 30 DEG C into the polymerization kettle; S2, injecting hot water into the polymerization kettle in the step S1, so that the monomer is heated to begasified, and the pressure in the polymerization kettle is increased; S3, observing a pressure value in the polymerization kettle, and stopping injecting the hot water when the pressure is increasedto 1 Mpa; S4, coating the joint of a kettle body and a pipeline flange and the joint of a stirring shaft and the kettle body with foam water, controlling the pressure in the polymerization kettle to be maintained for 10-15 minutes, and observing whether bubbles are generated or not; and S5, recovering the monomer in the polymerization kettle after detection is finished. The method has the beneficial effects that the detection time for leakage of the polymerization kettle can be greatly shortened, so that the utilization rate of the polymerization kettle is improved, and meanwhile, the production benefit of an enterprise is improved.

The invention provides a flame-retardant self-adhesive for a composite gas isolation board and a preparation method thereof, which solves the problem of the composite gas isolation board in the prior art, where the ordinary waterproof board cannot be fully bonded to the second lining structure, causing the primary lining to be separated from the second lining. The occurrence of water channeling between the structures will cause the technical problem of large-area leakage of the structure. It is prepared from the following raw materials in weight percentage: SIS elastomer 18%-21%; first polyisobutylene 10%-18%; second polyisobutylene 6%-8%; first C5 petroleum resin 25%-30%; The second C5 petroleum resin 5%-12%; flame retardant 10%-20%; polyethylene wax 2%-5%; antioxidant 1%-1.5%; anti-ultraviolet agent 0.5%-1.5%; The sum of weight percentages is 100%. When the present invention is applied to the composite gas isolation board, water channeling between the primary lining and the secondary lining structure is avoided, and large-area leakage of the structure can be avoided.

The invention provides a composite durable anti-static gas isolation system and a construction method, and solves the technical problems that in the prior art, only a gas isolation plate is adopted for blocking gas, the potential safety hazard that the gas escapes easily exists, and the operation risk of a gas tunnel is large. The system sequentially comprises a primary lining concrete structure doped with an airtight agent, an anti-static polyethylene closed-cell foam board, an isolation board and a secondary lining concrete structure doped with the airtight agent, wherein the primary liningconcrete structure doped with the airtight agent is arranged on one side close to the gas. According to the system, gas isolation, flame retardancy, anti-static property and excellent mechanical properties can be met, escape of the gas can be avoided as much as possible, and the safety of gas tunnel engineering operation is improved.