32results about How to "Avoid direct erosion" patented technology

The invention discloses a wave, wind and light comprehensive electricity generation ship on the sea in the technical field of development and utilization of ocean renewable energy sources. Floaters are installed on the two sides of a hull respectively, the floaters vibrate up and down under the action of waves, and wave energy is firstly translated into mechanical energy and then translated into high-pressure energy of hydraulic oil through a hydraulic transition system; a perpendicular shaft wind machine is installed on a deck of the hull, wind rotors rotate under the action of blown wind, and wind energy is firstly translated into mechanical energy and then translated into high-pressure energy of the hydraulic oil through the hydraulic transition system; the hydraulic oil carrying the high-pressure energy works through impacting a hydraulic motor and drives a direct driven electric generator to generate electricity; a photovoltaic cell square matrix is installed on the deck of the hull to absorb solar energy and translate the solar energy into electric energy. The wave, wind and light comprehensive electricity generation ship solves the problems that electricity generation with ocean energy resources is high in unit cost, poor in stability and the like, and greatly improves competitive power of the development and utilization of the ocean renewable energy sources due to the high flexibility of a system.

The invention discloses a nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst and a preparation method and an application thereof. The catalyst is characterized in that for a structural unit, nitrogen-doped carbon nanotubes (NCNTs) are utilized as a conductive network, and iron-cobalt alloy nanoparticles wrapped by a nitrogen-doped ultrathin carbon layer are loaded on the nitrogen-doped ultrathin carbon layer. The preparation method comprises steps of pretreatment of carbon nanotubes, removing impurities on surfaces of the carbon nanotubesthrough cleaning, and generating a large number of defects and oxygen-containing surface functional groups on the surfaces of the carbon nanotubes through acid treatment; carrying out grafting reaction of an iron-cobalt organic ligand and melamine on the surfaces of the functionalized carbon nanotubes; calcining the iron-cobalt organic ligand and the melamine-grafted functionalized carbon nanotubes under a high-temperature condition to obtain the nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst.

The invention relates to a wafer supporting device, which comprises a wafer holder, a focusing ring and an insulating member arranged on the wafer holder. The surface of the insulating member is provided with a first section and a second section. The second section can be aligned with the focusing ring. By adopting the insulating member with an improved structure, the wafer supporting device can avoid the damage of the focusing ring due to the fact the plasma generated in the semiconductor manufacturing process erodes the fringe of the focusing ring directly, reduce the loss of the focusing ring and the insulating member and prolong the service life. Furthermore, the invention can improve etching uniformity of a wafer in the etching process, and improve yield of the product correspondingly.

The invention discloses a construction method for an enclosure structure unit of a water-area ecological breeding pasture as well as the enclosure structure unit and application thereof. The enclosure structure unit comprises at least two concrete tubular piles which are mutually spaced and fixed in a water area, and a grating net connected between every two concrete tubular piles, wherein the construction of each concrete tubular pile is combined with a specific outer retaining wall indwelling layer or an outer retaining wall sleeve, and a concrete cast-in-place method is adopted, so that the concrete tubular pile is quickly formed. The enclosure structure unit is utilized to enclose the water area into an ecological breeding pasture which can perform water exchange with the outside. The construction method for the enclosure structure unit of the water-area ecological breeding pasture as well as the enclosure structure unit and application have the advantages that through the technology, an enclosure structure unit which is strong in wind and wave resistance and efficient and fast in construction can be processed, thereby further forming a water-area ecological breeding pasture, which is conducive to promoting development and utilization of water area resources, especially the marine resources, and economic and social development.

The invention discloses a wave, wind and light comprehensive electricity generation ship on the sea in the technical field of development and utilization of ocean renewable energy sources. Floaters are installed on the two sides of a hull respectively, the floaters vibrate up and down under the action of waves, and wave energy is firstly translated into mechanical energy and then translated into high-pressure energy of hydraulic oil through a hydraulic transition system; a perpendicular shaft wind machine is installed on a deck of the hull, wind rotors rotate under the action of blown wind, and wind energy is firstly translated into mechanical energy and then translated into high-pressure energy of the hydraulic oil through the hydraulic transition system; the hydraulic oil carrying the high-pressure energy works through impacting a hydraulic motor and drives a direct driven electric generator to generate electricity; a photovoltaic cell square matrix is installed on the deck of the hull to absorb solar energy and translate the solar energy into electric energy. The wave, wind and light comprehensive electricity generation ship solves the problems that electricity generation with ocean energy resources is high in unit cost, poor in stability and the like, and greatly improves competitive power of the development and utilization of the ocean renewable energy sources due to the high flexibility of a system.

The invention relates to a water-jacket type reverse microcirculation guiding coring device. The coring device comprises a drill bit and a clamp spring seat, wherein the clamp spring seat is nested inthe drill bit, a through water tank is arranged on the outer side wall of the clamp spring seat, a drill bit matrix and a drill bit matrix working layer are arranged at one end of the drill bit, direct water injection nozzles and side water injection nozzles communicating with the water tank are arranged on the drill bit matrix and the drill bit matrix working layer, and direct water injection tanks and side water injection tanks are further arranged in the drill bit matrix and the drill bit matrix working layer. According to the coring device, other matching structures of a rope coring drilling tool are integrated and effectively combined, so that a fractured formation can smoothly enter an inner pipe for guiding while drilling fluid is prevented from directly eroding rock cores, the rock core clamping distance is shortened during coring, and therefore, the rock core recovery rate is increased.

The invention discloses a horizontally-arranged periodic blow-down flash tank which cannot cause washout to a shell body easily. The horizontally-arranged periodic blow-down flash tank is provided with a shell body, the top of the shell body is provided with a sewage inlet pipe, the opening in the top of the sewage inlet pipe is a boiler periodic blow-down inlet, a spraying energy dissipater is installed in the inner cavity of the shell body, an opening in the bottom of the sewage inlet pipe is communicated with an inlet of the spraying energy dissipater, and a secondary steam discharge outlet is formed in the top of the shell body. The spraying energy dissipater is provided with a spraying pipe, the opening in the bottom of the sewage inlet pipe is communicated with an opening in the top of the spraying pipe, and a plurality of spraying holes which are arrayed evenly are formed in the bottom of the spraying pipe. A steam-water separating device is installed on the upper portion of the inner cavity of the shell body, and the steam-water separating device is installed on the bottom of the secondary steam discharge outlet and is communicated with the secondary steam discharge outlet. High-temperature high-pressure boiler blow-down water enters the spraying energy dissipater through the sewage inlet pipe, the flow direction of sewage is changed through the spraying energy dissipater, direct washout of the high-temperature high-pressure boiler blow-down water to the shell body of equipment is avoided, and the service life of the equipment is prolonged.

The invention relates to a high-erosion-resistance screen pipe outer protective cover and a method for reducing the erosion damage risk of a screen pipe. The outer protective cover comprises an inner layer base body and an outer layer base body, wherein the inner layer base body and the outer layer base body are both provided with arc-shaped punching seams which are transversely arranged, and the arc-shaped punching seams are staggered, the arc directions are opposite. The method for reducing the erosion damage risk of the screen pipe comprises the steps that S1, the high-erosion-resistance screen pipe is provided, the side face inclined high-speed inflow erosion protection function is enhanced, and the flowing resistance of fluid passing through the outer protection cover is reduced; S2, a method for identifying the high-speed inflow position and area of the oil and gas well production interval can identify the area and length with high erosion risk in the production process; and S3, a sand control well completion design method for reducing the erosion damage risk of the screen pipe is adopted. According to the high-erosion-resistance screen pipe outer protective cover and the method, the anti-erosion capacity of the screen pipe in a high-erosion-risk area in the whole well section is improved, the erosion damage risk of the screen pipe at the bottom of the well is reduced, meanwhile, the use amount of the screen pipe of the high-erosion-resistance outer protective cover is reduced, and the sand control well completion cost is saved.

The invention relates to an electrolytic tank for researching an electrochemical behavior of an electroactive oxide in a fused electrolyte. According to the technical scheme, the electrolytic tank comprises a ZrO2 pipe (3), a reference electrode (15), an auxiliary electrode (1) and a solid working electrode (2), wherein the fused electrolyte is put in the closed end of the ZrO2 pipe (3); the auxiliary electrode (1) and the reference electrode (15) are annularly sintered on the outer surface of the closed end of the ZrO2 pipe (3) in sequence from bottom to top; the upper boundary of the auxiliary electrode (1) is flush with the liquid level of the fused electrolyte in the ZrO2 pipe (3); the reference electrode (15) is tightly adjacent to the upper boundary of the auxiliary electrode (1); the lower end of the solid working electrode (2) is inserted into the fused electrolyte; one end of a reference electrode wire (4), one end of an auxiliary electrode wire (7) and one end of a solid working electrode wire (8) are correspondingly connected with the reference electrode (15), the auxiliary electrode (1) and the solid working electrode (2). The electrolytic tank for researching the electrochemical behavior of the electroactive oxide in the fused electrolyte has the characteristics of simple structure, easiness in operation, high interference resistance and more stable and reliable test result.

The invention provides a toppling-preventive fuel tank cap and carbon canister combination of a small gasoline engine. The toppling-preventive fuel tank cap and carbon canister combination comprises a fuel tank cap outer cover, a clamp ring with lugs, a compression spring and a fuel tank cap sealing pad; the carbon canister loaded with activated carbon is positioned in space formed by a locking framework and the fuel tank cap outer cover in an encircled manner; the carbon canister is hermetically connected with the locking framework; a guide sleeve is connected to the lower portion of the carbon canister, and a lower shell cap is connected to the lower end of the guide sleeve; a valve capable of sliding up and down is arranged in the guide sleeve, a valve spool which is in seal fit with a valve port is arranged at the upper end of the valve, and the valve port is formed in the wall of the carbon canister; a ball is arranged on the lower portion of the valve; the lower portion of a ball seat is connected with the lower shell cap, and the ball is positioned in a conical concave portion of the ball seat; the conical concave portion is communicated with an air inlet formed in the lower shell cap; air outlets are formed in the upper portion of the carbon canister and are communicated with the outside of a fuel tank via air vents formed in the fuel tank cap outer cover or the locking framework; when the toppling-preventive fuel tank cap and carbon canister combination is tilted, the ball in the conical concave portion pushes the valve to move, so that the valve port can be sealed by the valve spool. The toppling-preventive fuel tank cap and carbon canister combination has the advantages that functions of a fuel stop valve, functions of the activated carbon canister and functions of a fuel tank cap are integrated in the toppling-preventive fuel tank cap and carbon canister combination, and the toppling-preventive fuel tank cap and carbon canister combination is simple in structure.

The invention discloses a wave energy power generation device and method. The wave energy power generation device comprises a swing device, a transmission device and a power generation device. The swing device is connected with the transmission device. The transmission device comprises transmission rods and pistons. The transmission rods are connected with the power generation device through the corresponding pistons. The power generation device comprises a power generation passage, magnetic bodies and electrode plates. The pistons move on the inner wall of the power generation passage. A sealing cavity is formed between the power generation passage and the pistons. The sealing cavities are internally provided with metallic fluid. The magnetic bodies are arranged on the outer side of the middle portion of the power generation passage and are magnetically matched with the metallic fluid. The electrode plates are arranged on the sidewall of the power generation passage and located between the magnetic bodies and are perpendicular to the magnetic bodies. According to the wave energy power generation device and method, the intermediate conversion link is omitted; the wave energy powergeneration device is simple in system, safe, reliable and low in maintenance cost; the problems that a transmission power generator is not matched with wave characteristics and an intermediate conversion system is low in system efficiency and poor in operation stability are solved; and the efficiency of the whole wave energy power generation device is improved.

The present invention discloses a composite submarine cable protection system convenient to detect, position and repair. The system comprises a cylindrical cover body, the cover body is internally provided with a cylindrical detection cavity of which the annular side wall is a mirror surface, the left side wall in the detection cavity is provided with a wireless charger, and the bottom wall of the detection cavity is fixedly provided with a plurality of fixing blocks which are transversely arranged. The upper side of the fixing block is connected with a supporting rod through a coil spring, a bearing block is fixedly arranged on the upper side of the supporting rod, a cable penetrating through the left end and the right end of the cover body is borne on the upper side of the supporting rod, a device body is arranged in the detection cavity, a penetrating groove penetrating left and right is formed in the device body, and the cable penetrates through the penetrating groove; and by wrapping the cable for protection, the possibility of being bitten by fishes is avoided, the possibility of cable damage is reduced, the maintenance cost of the protection shell is low, accurate positioning can be achieved after detection, and maintenance is simple.

The invention discloses a polyester-mixed cotton cloth with good hygroscopicity. The polyester-mixed cotton cloth comprises a body, a water storage layer is connected to the surface of the body through a binder, an isolation thin film layer is connected to the surface of the water storage layer through a binder, a water absorbing layer is connected to the surface of the isolation thin film layer through a binder, an untwisted cotton towel cloth layer is connected to the inner surface of the water absorbing layer through a binder, and a superfine fiber towel cloth layer is connected to the inner surface of the untwisted cotton towel cloth layer through a binder. According to the polyester-mixed cotton cloth, by connecting the water storage layer to the surface of the body through the binder, the effect of water storage is achieved, and the situation that a water source directly erodes the interior of the cotton cloth is prevented; by connecting the isolation thin film layer to the surface of the water storage layer through the binder, the effect of isolating the water source is achieved; by connecting the water absorbing layer to the surface of the isolation thin film layer throughthe binder, the effect of good hygroscopicity is achieved, and the problem that when an existing polyester-mixed cotton cloth is in use, the hygroscopicity is poor, and the interior of the cloth veryeasily gets humid accordingly is solved.

The invention relates to an electrolytic tank for researching an electrochemical behavior of an electroactive oxide in a fused electrolyte. According to the technical scheme, the electrolytic tank comprises a ZrO2 pipe (3), a reference electrode (15), an auxiliary electrode (1) and a solid working electrode (2), wherein the fused electrolyte is put in the closed end of the ZrO2 pipe (3); the auxiliary electrode (1) and the reference electrode (15) are annularly sintered on the outer surface of the closed end of the ZrO2 pipe (3) in sequence from bottom to top; the upper boundary of the auxiliary electrode (1) is flush with the liquid level of the fused electrolyte in the ZrO2 pipe (3); the reference electrode (15) is tightly adjacent to the upper boundary of the auxiliary electrode (1); the lower end of the solid working electrode (2) is inserted into the fused electrolyte; one end of a reference electrode wire (4), one end of an auxiliary electrode wire (7) and one end of a solid working electrode wire (8) are correspondingly connected with the reference electrode (15), the auxiliary electrode (1) and the solid working electrode (2). The electrolytic tank for researching the electrochemical behavior of the electroactive oxide in the fused electrolyte has the characteristics of simple structure, easiness in operation, high interference resistance and more stable and reliable test result.

The invention discloses a heat preservation method and device for a flow transmitter. The heat preservation method comprises the steps of forming a heat preservation layer; the heating sheet is inserted into the thermal insulation material; heating the thermal insulation material; detecting the temperature of the insulating layer; the temperature of the heat preservation layer reaches the preset temperature, and the heating piece is controlled to enable the temperature of the heat preservation layer to be constant within the preset temperature interval; the temperature data of the heat preservation layer correspond to time to form a temperature curve; forming a temperature-time change diagram; marking a preset temperature interval on the temperature-time change chart; counting the duration and times when the temperature of the thermal insulation layer is not in the preset temperature interval; performing comparison; and when the duration when the temperature of the thermal insulation layer is not in the preset temperature interval is greater than preset time or the frequency is greater than preset frequency, sound-light alarm information is sent out. The overall temperature of the flow transmitter is not too low, internal electronic elements are protected, the flow transmitter can be used in a low-temperature environment for a long time, and damage or failure of the flow transmitter is avoided.

The invention discloses a roll-free variable-stiffness vibration damping bearing. The roll-free variable-stiffness vibration damping bearing comprises a lower basin, a rubber plate body, a liner plate body and a backing plate body, wherein the rubber plate body is arranged in at bottom of the inner side of the lower basin; the lower surface of the liner plate body is in contact connection with the upper surface of the rubber plate body; the upper surface of the liner plate body is in contact connection with the lower surface of the backing plate body. Grooves are respectively formed in the upper surface or / and the lower surface of the rubber plate body of the roll-free variable-stiffness vibration damping bearing disclosed by the invention, so that the grooves can provide space for the compression deformation of the rubber plate body; the area proportion of the different grooves is adjusted, the rubber plate body with different elastic properties can be obtained; the rubber plate body is relatively closed in the inner space by the lower basin of the roll-free variable-stiffness vibration damping bearing; the conditions that the rubber plate body is exposed in air and directly radiated the ultraviolet rays, and is directly eroded by poor weather conditions are avoided; the service life of the vibration damping bearing disclosed by the invention is prolonged.

The invention discloses a floor substrate, a floor assembly and a floor. The floor substrate comprises an upper plate, a lower plate matching the upper plate, and an elastic connecting structure arranged between the upper plate and the lower plate, wherein the upper plate, the lower plate and the elastic connecting structure are all made of metal materials. According to the floor substrate, the upper plate, the lower plate and the elastic connecting structure are arranged in a matching manner, so that the floor has the advantages of long service life, good heat-conduction effect, low operationcost and good moisture-proof effect, the service life of a wood floor is prolonged, the decoration cost is reduced, the decoration effect is improved, and the mounting is more stable.

The invention discloses a protection method for a roller surface at the environment temperature of -35 DEG C to +30 DEG C. The protection method has the following advantages that (1) the roller surface is coated with a layer of light white oil crude oil without any additive, and the situation that common alcohol and ester additives with the carbon number distributed between C12 and C16 are crystallized, separated out and bonded to the roller surface in a low-temperature environment (the temperature is lower than 20 DEG C) can be effectively avoided; and (2) the outer ring of a roller is coated with a layer of oxidation-resistant and corrosion-resistant R5231 anti-rust oil, atmospheric environment gas can be isolated, the situation that the gas directly corrodes the roller surface, and consequently rust spots are generated on the roller surface is prevented, and meanwhile the situation that the anti-rust oil makes direct contact with the roller surface, and consequently the roller surface is difficult to clean subsequently is avoided.

The invention provides a sand control sieve tube used for filling a horizontal well with gravels. The sand control sieve tube comprises a base tube and sand control assemblies, wherein the base tube and the sand control assemblies are located in the horizontal well. At least two grooves are formed in the outer wall of the base tube, and through holes communicating with an inner cavity of the base tube are formed in the bottoms of the grooves. The sand control assemblies are embedded in the grooves correspondingly. Each groove is provided with a positioning side wall and a guiding side wall opposite to the positioning side wall, and a slope which inclines outwards is arranged on each guiding side wall. Each sand control assembly is provided with a first side and a second side opposite to the first side, wherein the first side abuts against the corresponding positioning side wall, and an sand cavity which is open outwards is formed between the second side and the corresponding guiding side wall. Each sand control assembly further comprises at least two filter pieces which are arranged in the circumferential direction of the base tube in a spaced mode, wherein a gasket is arranged between the upper portions of every two adjacent filter pieces in a clamped mode, and an overflow gap is formed between every two adjacent filter pieces and located below the corresponding gasket and communicates with the corresponding through hole in an aligned mode. According to the sand control sieve tube, the sand control assemblies can be protected both in the construction process and the production process, and the situation that the overflow gaps are scoured to become large and consequentially fail is prevented.

The invention discloses a drill mast. The drill mast comprises a main mast section, and a mast top section and a mast tail section which are positioned at the two ends of the main mast section respectively, wherein a fixed pulley, a movable pulley and a chain are arranged on the mast; the drill mast further comprises a protective cover arranged outside the mast; the protective cover is detachably and fixedly connected with the mast. After application of the drill mast provided by the invention, through arrangement of the protective cover, the chain and other structures which are exposed outside the mast are covered to avoid direct erosion of wind, sand and other severe environments, so that the service lives of components can be effectively prolonged, and thus the service life of the drill mast is prolonged and the working safety and the working reliability of the drill mast are improved; meanwhile, the protective cover is detachably and fixedly connected with the mast, and when the protective effect of the protective cover declines due to environmental erosion, only the protective cover is changed conveniently, so that the cost is lowered. The invention further provides a drill comprising the drill mast.

The invention provides a toppling-preventive fuel tank cap and carbon canister combination of a small gasoline engine. The toppling-preventive fuel tank cap and carbon canister combination comprises a fuel tank cap outer cover, a clamp ring with lugs, a compression spring and a fuel tank cap sealing pad; the carbon canister loaded with activated carbon is positioned in space formed by a locking framework and the fuel tank cap outer cover in an encircled manner; the carbon canister is hermetically connected with the locking framework; a guide sleeve is connected to the lower portion of the carbon canister, and a lower shell cap is connected to the lower end of the guide sleeve; a valve capable of sliding up and down is arranged in the guide sleeve, a valve spool which is in seal fit with a valve port is arranged at the upper end of the valve, and the valve port is formed in the wall of the carbon canister; a ball is arranged on the lower portion of the valve; the lower portion of a ball seat is connected with the lower shell cap, and the ball is positioned in a conical concave portion of the ball seat; the conical concave portion is communicated with an air inlet formed in the lower shell cap; air outlets are formed in the upper portion of the carbon canister and are communicated with the outside of a fuel tank via air vents formed in the fuel tank cap outer cover or the locking framework; when the toppling-preventive fuel tank cap and carbon canister combination is tilted, the ball in the conical concave portion pushes the valve to move, so that the valve port can be sealed by the valve spool. The toppling-preventive fuel tank cap and carbon canister combination has the advantages that functions of a fuel stop valve, functions of the activated carbon canister and functions of a fuel tank cap are integrated in the toppling-preventive fuel tank cap and carbon canister combination, and the toppling-preventive fuel tank cap and carbon canister combination is simple in structure.

The invention provides a novel cable connection protection device comprising a male connector and a female connector, wherein the male connector and the female connector are fixed by a fixing device,one ends of the male connector and the female connector are both provided with circular holes, through which a cable can run through; the male connector and the female connector are in a hollow structure and used for holding the cable connection parts inside. The novel cable connection protection device provided by the invention can effectively protect the cable connection parts from direct erosion of rainwater and leakage, and can prevent cables from rot due to sunlight.

The invention relates to a low temperature two-effect sea water desalting device. The device adopts engine cooling water or solar energy hot water and the like as a heat flow and adopts a gravity type heat pipe with high heat conductivity coefficient as a heat transfer medium, and seawater is subjected to low temperature distillation under low boiling point in a vacuum environment created by a jet flow vacuum pump. More importantly, the vapor generated by first effect distillation is utilized as a second effect hot source again to continue to evaporate seawater, so that an energy source is effectively utilized, and thus the structure of the sea water desalting device is simple, the manufacture is simple, the consumption is less, the maintenance is convenient, the cost is low, the service life is long, and the water producing ratio is large; compared with other sea water desalting devices, the low temperature two-effect sea water desalting device is greatly improved on aspects such as economy, practicability and working stability.

The invention discloses a mechanical in-place feedback device for a travel switch of a plugboard type air door. The mechanical in-place feedback device comprises a travel push rod, the travel push rod is mounted in a push rod fixing base, the push rod fixing base is mounted on the door frame, a contact piece of the travel push rod can contact a contact piece of the travel switch at the external, the push rod fixing base is arranged at one end of the inner side of an air door, and the top of the push rod fixing base is sleeved with an air door inner side large nut, the air door inner side large nut wraps an air door inner side graphite ring and an air door inner side seal ring, the push rod fixing seat is arranged at one end of the air door outer side and connected with one end of a seal shaft pipe, the other end of the seal shaft pipe is sleeved with an air door outer side large nut, the air door outer side large nut wraps an air door outer side graphite ring and an air door outer side seal ring, one end of a push rod return spring is fixed on the seal shaft pipe, and the other end is fixed to a travel push rod. The beneficial effect of the mechanical in-place feedback device for the travel switch of the plugboard type air door is that direct corrosion on spring caused by high temperature medium in air channel can be avoided, because a push rod return spring is mounted on the outer side of an air door.

The invention discloses a soil form test device, system and method under the action of seepage. The technical scheme is as follows: the device comprises a seepage destroying chamber for filling soil,a steady flow chamber is installed below the seepage destroying chamber, and a water tank is installed on one side of the seepage destroying chamber; and a plurality of movable pressurizing modules are mounted on the side surface of the seepage destroying chamber and can apply pressure to the soil body in the seepage destroying chamber. The device can be used for researching change rules of deformation parameters and seepage parameters of the excavation face under the conditions of different soil texture materials and different structure excavation faces, and is easy to use and convenient to operate.

The invention discloses a dome of a coal-water slurry gasifier. The dome includes a conical top and a spherical middle part. The feature is that the lower end of the dome is in an inverted cone shape. The lower end of the vault of the present invention is in an inverted cone shape, so that the vault structure forms a conical, spherical, and inverted cone-shaped space, and the high-speed airflow is first adjusted at the transition of the inverted cone shape, avoiding the direct erosion of the expansion joint by the high-speed airflow , to adapt to the configuration of the air flow field of the gasifier, reduce the erosion of the refractory brick by the air flow field in the furnace, and prolong its service life.

The invention discloses a control device for a garden decorative lamp, which comprises a garden lamp. An apron mechanism is installed at the lower end of the garden lamp. The corresponding cooperation between the ring rail cavity and the coil spring enables the outer ring to clamp the coil spring between the outer ring and the outer buried ring with the help of the inner ring cavity, and then the coil spring is limited as a whole through the lower ring wall The inner side of the inner ring cavity can effectively avoid derailment of the coil spring during the up and down bouncing process, and use the reverse rebound force generated after the coil spring is squeezed to quickly push the control opening mechanism together with the apron mechanism to the outer embedded ring The upper side of the bottom presses down through the bottom pressure plate to compact the soil at the bottom while improving the integrity and firmness of the soil.

The invention discloses a mechanical in-place feedback device for a travel switch of a plugboard type air door. The mechanical in-place feedback device comprises a travel push rod, the travel push rod is mounted in a push rod fixing base, the push rod fixing base is mounted on the door frame, a contact piece of the travel push rod can contact a contact piece of the travel switch at the external, the push rod fixing base is arranged at one end of the inner side of an air door, and the top of the push rod fixing base is sleeved with an air door inner side large nut, the air door inner side large nut wraps an air door inner side graphite ring and an air door inner side seal ring, the push rod fixing seat is arranged at one end of the air door outer side and connected with one end of a seal shaft pipe, the other end of the seal shaft pipe is sleeved with an air door outer side large nut, the air door outer side large nut wraps an air door outer side graphite ring and an air door outer side seal ring, one end of a push rod return spring is fixed on the seal shaft pipe, and the other end is fixed to a travel push rod. The beneficial effect of the mechanical in-place feedback device for the travel switch of the plugboard type air door is that direct corrosion on spring caused by high temperature medium in air channel can be avoided, because a push rod return spring is mounted on the outer side of an air door.

The invention discloses a soil form test device, system and method under the action of seepage. The technical proposal is as follows: a seepage destruction chamber for filling soil, a steady flow chamber installed below the seepage destruction chamber, and a side of the seepage destruction chamber A water tank is installed; a plurality of mobile pressurization modules are installed on the side of the seepage destruction chamber, and the mobile pressurization modules can exert pressure on the soil inside the seepage destruction chamber. The invention can be used to study the variation law of deformation parameters and seepage parameters of the excavation surface under the conditions of different soil materials and different structures of the excavation surface, and is easy to use and easy to operate.

The invention discloses a special anti-freezing device for a crude oil pressure gauge. The device comprises a pressure gauge, a mounting frame and first display glass are arranged on the pressure gauge; the bottom end of the pressure gauge is connected with a connecting pipe, a piston is arranged in the connecting pipe, the top end of the connecting pipe is filled with an anti-freezing solution, the anti-freezing solution is located on the upper side of the piston, a reset device is arranged at the bottom end of the piston, a protective shell is detachably installed on the outer side of the pressure gauge, and second display glass is arranged on the protective shell. The top end of the connecting pipe is filled with the anti-freezing solution, when the pressure gauge works, crude oil extrudes the piston to drive the anti-freezing solution to enter the spring pipe of the pressure gauge, liquid such as water is prevented from directly entering the spring pipe, the liquid such as water isprevented from freezing in the spring, and therefore the spring pipe and the pressure gauge can be prevented from being frozen.