36results about How to "Reduce scour damage" patented technology

The invention relates to a differential column-splitting inlet energy dissipater, comprising a water current inlet section, a stilling pool connected with the water current inlet section, and an apron connected with the stilling pool; the water current inlet section is composed of a high-level drainage channel (drainage hole) and a lower-level drainage channel (drainage hole) which are arrayed alternatively, a slim is arranged at the boundary position of a drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel and a bottom plate of the stilling pool, the slim is a right-angle wedge shape, the bottom surface of the right-angle wedge shape is arranged on the bottom plate of the stilling pool, and the side surface vertical to the bottom surface of the right-angle wedge shape is attached to the drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel, a tail sill of the stilling pool is a differential tail sill, and the top surface of the differential tail sill is formed by a combined surface unit I and a combined surface II which have different structures and are arrayed alternatively; a middle isolated pier tail between the high-level drainage channel and the lower-level drainage channel is a cantilever type streamline pier tail. The energy dissipater can improve the service life and reduces scouring damage of water current to downstream river channels.

The invention discloses an annular water inlet thin wall soil sampler and a use method thereof. The annular water inlet thin wall soil sampler comprises a drill rod joint pipe, an annular water inlet pipe cap, a waste soil room pipe, a thin wall sampling pipe and a safety bolt, wherein one end of the annular water inlet pipe cap is connected with the bottom end of the drill rod joint pipe; the other end of the annular water inlet pipe cap is connected with one end of the waste soil room pipe; the other end of the waste soil room pipe is connected with the thin wall sampling pipe; a circle of water inlet through holes are formed in the annular water inlet pipe cap along the circumference of the annular water inlet pipe cap. During use of the annular water inlet thin wall soil sampler, water is fed through the annular water inlet pipe cap in a static pressure process for flushing a pipe wall, thereby preventing waste soil from entering the waste soil room pipe and the thin-wall sampling pipe in the static pressure process; when the annular water inlet thin wall soil sampler is pressed to a position which is 30cm away from a sampling depth, water feeding is stopped, the thin wall sampling pipe is pressed to the sampling depth rapidly and uniformly, the safety bolt is placed into the drill rod joint pipe, the thin wall soil sampler is lifted, and a vacuum environment is formed in the whole thin wall soil sampler through the safety bolt, so that a sample is prevented from falling under the action of vacuum suction.

The invention discloses an energy dissipation construction structure suitable for a diffusion type drainage outlet. The energy dissipation construction structure suitable for the diffusion type drainage outlet comprises a diffusion type stilling pool, and also comprises a flat slope section arranged at the tail end of an upstream drainage open channel, and the flat slope section of the upstream drainage open channel is connected with the diffusion type stilling pool through a slope. The diffusion type stilling pool is internally provided with a diversion pier and a plurality of stilling piersin sequence in the flow-out direction. The cross section of the diversion pier is an isosceles triangle which is symmetrically arranged along a center line of the plane of the diffusion type stillingpool, and the apical angle of the isosceles triangle is opposite to the flat slope section of the upstream drainage open channel. A row of arc pier gates arching upstream are formed by the multiple stilling piers. The top elevations of the diversion pier and the stilling piers are higher than the water level of the diffusion type stilling pool. The tail end of the diffusion type stilling pool is aslope type tail ridge which is in an arc shape, and the top elevation of the slope type tail ridge is higher than the bottom elevation of the flat slope section of the upstream drainage open channel.The energy dissipation construction structure suitable for the diffusion type drainage outlet can fully diffuse the water flow, greatly improves the energy dissipation effect, and slows down the erosion damage to a seabed caused by drainage.

The invention discloses an automatic dredging system for a storage-capacity-regulating pipe culvert. The system comprises a dredging device, wherein the dredging device can slide in the storage-capacity-regulating pipe culvert, wherein the tail end of the storage-capacity-regulating pipe culvert is provided with a silting discharging pool and a sewage pump; the automatic dredging system comprises an aeration system which comprises an exhaust pipe arranged at the bottom of the storage-capacity-regulating pipe culvert; and a plurality of aeration holes are formed on the lower side of the exhaust pipe. The automatic dredging system disclosed by the invention comprises a dropping water energy storage device. The automatic dredging system disclosed by the invention has the beneficial effects of simple structure, energy conservation, high automaticity, good dredging effects and the like.

The invention discloses a buoyancy geomembrane device for preventing overburden dam failure. A wave-retaining wall is arranged on the dam crest on the upstream side, and a rectangular groove is fixed on the side wall of the wave-retaining wall facing the water. The length direction is parallel to the height direction of the wave wall, and several water inlet holes are opened on the side wall near the top of the rectangular groove, and a floating ball is arranged in the rectangular groove; the lower end of the floating ball is connected with one end of the corrosion-resistant metal wire, and the rectangular groove One end of the PVC pipe is fixed at the bottom, the other end of the PVC pipe is located in the dam crest, and the other end runs through the dam crest, protruding out of the downstream side wall of the dam crest, and the other end of the corrosion-resistant metal wire passes through the PVC pipe and protrudes The downstream side wall of the dam crest is connected with the support. The invention is installed under the anti-wave wall, and automatically deploys the geomembrane to protect the dam crest and the downstream surface from being scoured when flooding occurs, greatly reducing the scouring damage of the dam body, reducing the possibility of dam failure, and extending the length of the small earth-rock dam service life.

The invention provides an anti-scouring device for offshore wind power piles. The device comprises an anti-scouring cover for reducing scouring of wave and tidal current to a wind power pile foundation and an elastic pressing part for preventing collapse of the seabed surface. The anti-scouring cover is disposed at the position of the pile foundation and comprises a cover plate and a surrounding frame disposed under the cover plate, wherein the elastic pressing part is disposed between the cover plate and the seabed in a compression mode. The anti-scouring device has the advantages of ensuringthe stability of the pile foundation and being wide in adaptability and convenient to operate and install.

The invention discloses a tea seed grading winnower and belongs to the technical field of grading winnowing equipment of agriculture and forestry products. The tea seed grading winnower comprises a blower, an air duct, an air inlet pipe, a dust collector and an air return pipe, which are connected in sequence, wherein a feed hopper is mounted at the feed end of the air duct; a full seed discharging hopper, a non-full seed discharging hopper and a impurity and husk discharging hopper are arranged below the air duct in sequence; a feed adjusting mechanism is arranged at the bottom of the feed hopper; the feed adjusting mechanism comprises a feed adjusting plate, a handle, a locking handwheel and an arc-shaped guide plate; the feed adjusting plate is fixedly connected with the handle to form an included angle; a locking hole is formed in the handle; and a locking handwheel shaft passes through the locking hole and an arc-shaped guide groove in the arc-shaped guide plate. According to the physical characteristic that full seeds, non-full seeds, moldy tea seeds and empty husks have different densities, the tea seed grading winnower adopts strong wind to blow seeds or empty husks, which have different densities, to move different distances, and a plurality of different regions are divided according to the distances of falling points, so that the four kinds of materials are sorted accurately.

The invention provides a stop valve. The stop valve comprises a valve body, a valve element assembly, a temporary liquid storing cavity and a one-way backflow structure, wherein the valve body is provided with a closed work cavity, and the work cavity is provided with a first interface, a second interface and an installation hole; the valve element assembly comprises a valve rod installed in the installation hole, and a first valve clack arranged on the valve rod, and the first valve clack moves along with the valve rod to be communicated with or close the first interface and the second interface; the temporary liquid storing cavity is a sealed cavity which is formed outside the work cavity, and the sealed cavity has a position where the valve rod is matched with the installation hole; the one-way backflow structure is used for being unidirectionally connected with a channel from the temporary liquid storing cavity to the work cavity. Due to the arrangement of the temporary liquid storing cavity and the one-way backflow structure, the problem that in the prior art, residual liquid of a radioactive liquid medium remains after corrugated pipe is fractured is avoided, and the risk and hazard that people are irradiated when the stop valve is replaced and maintained are reduced. Meanwhile, the radioactive level of the stop valve is reduced, so that the requirements for facility maintenance and replacement are reduced, the building cost of devices, workshops and the like is saved, and the stop valve has very great economic benefits and social benefits.

The invention relates to a building which is located on a wide and deep soft foundation river and used for closure. According to the building, a bottom protection concrete slab is built on a riverbed, comb tooth piers are built on the bottom protection concrete slab and connected through steel wire ropes, and a stone blocking fence is formed by the comb tooth piers and the steel wire ropes together. The building has the advantages that the bottom protection concrete slab is built on the riverbed, so that scour damage to a riverbed soft foundation caused by high-speed water flows on a closure gap is reduced; the comb tooth piers are built on the bottom protection concrete slab, so that the diameter of special material used in river closure construction and material losses are reduced, tossing strength and difficulty of the closure construction are reduced, and meanwhile the comb tooth overflowing flow state is used for forming banked-up water rapidly in front of a gate to create good flow division conditions. If necessary, comb tooth protection bottom can be effectively combined with a cofferdam impermeable system to save construction cost and shorten a construction period, and the problems that large-fall high-flow deep soft foundation riverbed closure construction is difficult to organize, long in construction time and high in construction cost are solved.

The invention relates to a differential column-splitting inlet energy dissipater, comprising a water current inlet section, a stilling pool connected with the water current inlet section, and an apron connected with the stilling pool; the water current inlet section is composed of a high-level drainage channel (drainage hole) and a lower-level drainage channel (drainage hole) which are arrayed alternatively, a slim is arranged at the boundary position of a drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel and a bottom plate of the stilling pool, the slim is a right-angle wedge shape, the bottom surface of the right-angle wedge shape is arranged on the bottom plate of the stilling pool, and the side surface vertical to the bottom surface of the right-angle wedge shape is attached to the drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel, a tail sill of the stilling pool is a differential tail sill, and the top surface of the differential tail sill is formed by a combined surface unit I and a combined surface II which have different structures and are arrayed alternatively; a middle isolated pier tail between the high-level drainage channel and the lower-level drainage channel is a cantilever type streamline pier tail. The energy dissipater can improve the service life and reduces scouring damage of water current to downstream river channels.

The invention belongs to the technical field of stop valve structures, and discloses a three-stage throttling valve. The three-stage throttling valve comprises a valve body with a pressure inlet and apressure outlet, a passage opening controlled by a valve core to be opened or closed is arranged in the valve body to communicate the pressure inlet and the pressure outlet, produced gas enters the valve body from the pressure inlet and exits from the pressure outlet through the passage opening, the produced gas enters the pressure inlet with low pressure and exits from the pressure outlet with high pressure, the pressure inlet is provided with a throttling part I for throttling and depressurizing, a throttling part II for removing impurities of the produced gas through opposite flow is arranged at the passage opening, and the valve core is provided with a throttling part III which protects the valve core through staged depressurization.

The invention discloses a method for preventing earth dam overtopping breaking. The method includes the following steps that an electronic water level gauge detects a water level of a water body in real time, when the electronic water level gauge detects that the water level reaches a dangerous water level, an alarm sends an alarm signal to an operator on duty of an earth and rockfill dam, and theoperator on duty judges whether a waterproof membrane is laid down or not according to the alarm signal and a surveillance video or on-site observation. A support frame controlled remotely is in a supporting state at ordinary times, a support rod of the support frame controlled remotely is attached to the top of a dam so as to support a waterproof membrane roll, the support frame controlled remotely is laid down through remote closing in a distress situation, the waterproof membrane without supporting is automatically unfolded to overspread the downstream face with the gravity action and thewater scouring action, and the action of preventing dam breaking due to scouring damage is achieved.

An in-tunnel weak pressure sudden dropping and sudden expansion type jet flow stilling pool energy dissipation system is composed of a jet flow hole section connected with an upstream tunnel section, a drop sill arranged at an outlet of the jet flow hole section, a low-pressure stilling pool connected with the drop sill, and a tail sill connected with the tail of the low-pressure stilling pool and a downstream tunnel section from the upstream section to the downstream section in sequence. A gate matched with jet flow hole outlets is arranged at the outlet of the jet flow hole section and located above the drop sill. The jet flow hole section is provided with at least one jet flow hole, and the jet flow holes are formed by connecting a contraction type transition section with a pressing slop section in the water flow direction. In the formula d=(1.3-1.5)X, wherein d is the height of the low-pressure stilling pool, and X is the height of an upstream tunnel. Through the in-tunnel weak pressure sudden dropping and sudden expansion type jet flow stilling pool energy dissipation system, the energy dissipation effect can be ensured, cavitation and cavitation erosion as well as bottom plate scouring can be avoided, meanwhile, the engineering excavated volume is decreased, and the safety and economical efficiency of engineering are improved.

The invention discloses a desulfurization slurry pH monitoring system. The system comprises a sample injection pipe, a solid-liquid separation device, a constant temperature device, a measuring device, a clear liquid pipe and a control system; the output end of the sample injection pipe is communicated with the input end of the solid-liquid separation device; the solid-liquid separation device, the constant temperature device and the measuring device are sequentially communicated through pipelines; the clear liquid pipe is communicated with the measuring device, so that cleaning liquid in the clear liquid pipe can clean the pH measurement end in the measuring device; and the solid-liquid separation device, the constant temperature device and the measuring device are all electrically connected with the control system. With the desulfurization slurry pH monitoring system and monitoring method of the invention adopted, the timeliness of pH measurement is improved, the replacement frequency of the pH measurement end can be reduced, the maintenance cost is reduced, the influence of temperature on pH measurement is eliminated, and the accuracy of pH measurement values is improved; the procedure of taking out the pH measurement end is omitted, so that maintenance work and potential safety hazards are reduced; and it is guaranteed that the state of the pH measurement end meets the accurate measurement requirement.

The invention relates to a construction method of an ecological prefabricated reinforced-concrete torrent channel drainage system. The construction method mainly includes prefabricating a torrent channel, prefabricating grass planting mould boxes, constructing channels, mounting force-eliminating steps, mounting standard prefabricated sections of the torrent channel, mounting a prefabricated sump,mounting the grass planting mould boxes and mounting a spherical detachable filter screen. The prefabricated sections of the torrent channel are fastened together in a 'stacking type' way and are integrally bundled together by a steel cable, the two ends of the steel cable are drawn onto pre-embedded pull rings of the prefabricated sump, and the grass planting mould boxes are embedded into the tops of the prefabricated sections of the torrent channel. The torrent channel drainage system based on the prefabricated design concept has the advantages of convenience and rapidness in mounting, highconstruction speed, ecological environment protection and the like; damage, such as hollow-out and scouring, of drained water to roadbeds due to the problems such as water seepage, water leakage andsettlement deformation of brickwork-type torrent channels is avoided, and good economic and technical benefits are achieved.

The invention discloses a multifunctional ecological water supply hole structure for an ultrahigh rock-fill dam and an operation method, and belongs to the field of water resources and hydropower engineering. The multifunctional ecological water supply hole structure for the ultrahigh rock-fill dam can form different structures in different operation phases to achieve different functions and effects, is simple in structure arrangement and convenient to construct, synchronously has an ecological water supply function, a water storage and discharge control function, a maintenance period guide function and a flood season guide season function to achieve multiple effects, meets multiple demands of ultrahigh core-wall rock-fill dam engineering, can reduce other corresponding functional tunnelsneeded by the ultrahigh core-wall rock-fill dam engineering under the condition with corresponding functions, reduces the engineering quantity, and saves the engineering investment.

An in-tunnel weak pressure sudden dropping and sudden expansion type jet flow stilling pool energy dissipation system is composed of a jet flow hole section connected with an upstream tunnel section, a drop sill arranged at an outlet of the jet flow hole section, a low-pressure stilling pool connected with the drop sill, and a tail sill connected with the tail of the low-pressure stilling pool and a downstream tunnel section from the upstream section to the downstream section in sequence. A gate matched with jet flow hole outlets is arranged at the outlet of the jet flow hole section and located above the drop sill. The jet flow hole section is provided with at least one jet flow hole, and the jet flow holes are formed by connecting a contraction type transition section with a pressing slop section in the water flow direction. In the formula d=(1.3-1.5)X, wherein d is the height of the low-pressure stilling pool, and X is the height of an upstream tunnel. Through the in-tunnel weak pressure sudden dropping and sudden expansion type jet flow stilling pool energy dissipation system, the energy dissipation effect can be ensured, cavitation and cavitation erosion as well as bottom plate scouring can be avoided, meanwhile, the engineering excavated volume is decreased, and the safety and economical efficiency of engineering are improved.

The invention discloses a deep foundation pit fat groove backfilling system which comprises a rubble backfilling layer (4), a reserved pipeline (5), a composite stress backfilling layer and a top concrete backfilling layer (10). A foundation pit supporting system (1) of a deep foundation pit, a foundation pit foundation structure and a structural outer wall (8) form a semi-closed deep foundation pit fertile groove, the two sides of the deep foundation pit fertile groove are closed by the foundation pit supporting system and the structural outer wall, and the bottom of the deep foundation pit fertile groove is closed by the foundation pit foundation structure; the rubble backfill layer, the multiple composite stress backfill layers and the top concrete backfill layer are sequentially backfilled in the deep foundation pit fat groove from bottom to top to form a fat groove backfill structure. The reserved pipeline is vertically arranged in the deep foundation pit fat groove, the lower end of the reserved pipeline extends to the bottom of the rubble backfill layer, the upper end of the reserved pipeline extends to the position above the top concrete backfill layer, and a plurality of holes (51) are formed in the reserved pipeline. The problems that drainage and pressure reduction are difficult, internal stress is uneven and the backfilling effect is unstable in the deep foundation pit fat groove backfilling process can be effectively solved.

The invention provides a reverse slope type apron. The apron comprises a stilling pool apron section, a sea overtopping section and a big stone backfilling section; the sea overtopping section is arranged in a reverse slope type sea overtopping section manner; the scouring damage of water flowing out of a pond to the sea overtopping section is reduced; the flowing speed of water flowing out of thepond is reduced; a water surface line is smoothly connected with a downstream river channel; the vertical component speed of water flow flowing out of the pond is reduced; the water depth at the outlet of the stilling pool is increased, the overall stability of the stilling pool is improved, the depth of a water cushion in the stilling pool is increased, the energy dissipation rate is increased,the water surface line becomes gentle, water flow can better return to a groove, the stilling pool and the overall anti-scoring performance of the sea waves are improved, and the flow state of downstream water flow is greatly improved.

The invention discloses a hierarchical natural water landscape revetment with the functions of ecological protection and remediation and a construction method thereof. The revetment comprises a plurality of revetment units with a same structure, wherein the plurality of revetment units are arranged to form multiple stacked revetment unit layers from bottom to top; the plurality of revetment unitsin each layer are linearly adhered and aligned; the upper revetment unit layer is overlapped onto the lower revetment unit layer, and the revetment units in the upper layer and the lower layer are staggered; the multiple revetment unit layers retreat relative to the position of natural water layer by layer, and the upper revetment unit layer is farther away from the natural water. The revetment has basic functions of the conventional revetment, and further has a natural ecological environment protecting function and a natural water self-repairing function. The invention further discloses the construction method of the revetment.

The invention discloses a quantitative limiting valve for a crude oil conveying pipeline, and belongs to the field of valves. The quantitative limiting valve comprises a valve casing, wherein a valvedeck is clamped to the upper end of the valve casing, an adjusting rod is inserted into the valve deck, a pressure adjusting mechanism fixedly connected to the valve deck and comprises a shell, an adjusting bolt in threaded connection with the shell, a carrying bearing is rotationally connected to the end, located in the shell, of the adjusting bolt, the adjusting rod comprises a movable rod, a pressing plate and a supporting block are connected to the upper end and the lower end of the movable rod respectively, an outer ring of the carrying bearing is fixedly connected with the pressing plate, a compression spring is connected between the pressing plate and the valve deck, an inserting groove is cut in the upper end of the pressing plate, and a handle matched with the pressing plate is slidably connected to the top end of the shell. Through the quantitative limiting valve, the flow of fluid in a valve body can be rapidly adjusted, damage to the inner wall of the valve body when crudeoil in the valve body flushes the inner wall of the valve body is reduced, the interior of the valve body can be self-repaired in time after being damaged, and the service life of the valve body is prolonged.

The invention discloses an optimal arrangement method of a bridge coup. The method is characterized in that the critical conditions for the optimal arrangement can be obtained by a water tank test which is carried out through a varying-slope circulating glass water tank (1). The method comprises the steps of 1, performing single-columned pier test to verify the reliability of a test system; 2, testing with two pier columns according to different pier spaces; 3, respectively observing the local scouring features of single pier column and the upstream and downstream pier columns in step 1 and 2; 4, analyzing to obtain the critical conditions for the optimal arrangement, namely, the critical conditions that two piers do not influence each other. With the adoption of the method, the critical condition that the upstream and downstream bridge piers do not influence each other in scouring is determined, which is of general guide significance for the optimal arrangement of the bridge group; the method is simple and easy to be carried out; the construction cost and the accumulation influence on the bridge group can be reduced; therefore, the pressure from bridge pier scouring damage and urban flood control can be reduced. The formula is shown in the specification.

The invention discloses a bank scour prevention floating dam structure and a bank scour prevention system, belongs to the technical field of water conservancy projects and engineering emergency rescue, and provides the bank scour prevention floating dam structure capable of slowing down the water flow speed of local parts of a bank and preventing the locally collapsed bank from being continuously scoured and damaged by flood. The bank scour prevention floating dam structure comprises a main chain, a floating box, a flow stop net and a traction rope; the lower end of the main chain is connected with a flow stop stone; the floating box is used for floating on the water surface; one end of the floating box is connected with the main chain; the upper edge of the flow stop net is suspended on the floating box; and one end of the traction rope is connected with the floating box. The bank scour prevention floating dam structure can effectively slow down the water flow speed of the local parts of the bank through the flow stop net structure, reduces continuous scouring and damage of the flood to the locally collapsed bank, and achieves an effective protection effect on the locally collapsed bank.

The invention provides an adjusting valve labyrinth disc combined structure with a guide sleeve. The structure comprises the guide sleeve, and a plurality of adjusting labyrinth type discs are stacked outside the guide sleeve in a sleeving manner. The adjacent adjusting labyrinth type discs are fixed through cooperation of concave grooves and convex grooves. Sleeve grooves allowing fluid to flow are formed in the positions, flush with the position of labyrinth flow channels on the mounted adjusting labyrinth type discs, of the guide sleeve, and through flow holes are formed in the sleeve grooves. The discs are directly restrained and fixed through the self structures and the guide sleeve, the processing and assembling process is simplified, and cost is reduced. The discs are movably restrained, only the damaged discs are replaced in the repair process, and the repair cost is reduced. Hard alloy is overlaid or sprayed to the inner wall of the sleeve, and the overall service life of a valve element assembling part is prolonged. On the premise of guaranteeing that that the adjusting labyrinth type disc assembling part meets flow performance, the assembly precision is improved, the valve production efficiency is improved, the service life of the assembling part is prolonged, and the production and repair cost is reduced.

The invention discloses a tea seed grading winnower and belongs to the technical field of grading winnowing equipment of agriculture and forestry products. The tea seed grading winnower comprises a blower, an air duct, an air inlet pipe, a dust collector and an air return pipe, which are connected in sequence, wherein a feed hopper is mounted at the feed end of the air duct; a full seed discharging hopper, a non-full seed discharging hopper and a impurity and husk discharging hopper are arranged below the air duct in sequence; a feed adjusting mechanism is arranged at the bottom of the feed hopper; the feed adjusting mechanism comprises a feed adjusting plate, a handle, a locking handwheel and an arc-shaped guide plate; the feed adjusting plate is fixedly connected with the handle to form an included angle; a locking hole is formed in the handle; and a locking handwheel shaft passes through the locking hole and an arc-shaped guide groove in the arc-shaped guide plate. According to the physical characteristic that full seeds, non-full seeds, moldy tea seeds and empty husks have different densities, the tea seed grading winnower adopts strong wind to blow seeds or empty husks, which have different densities, to move different distances, and a plurality of different regions are divided according to the distances of falling points, so that the four kinds of materials are sorted accurately.

The invention belongs to the technical field of stop valve structures, and discloses a three-stage throttling valve. The three-stage throttling valve comprises a valve body with a pressure inlet and apressure outlet, a passage opening controlled by a valve core to be opened or closed is arranged in the valve body to communicate the pressure inlet and the pressure outlet, produced gas enters the valve body from the pressure inlet and exits from the pressure outlet through the passage opening, the produced gas enters the pressure inlet with low pressure and exits from the pressure outlet with high pressure, the pressure inlet is provided with a throttling part I for throttling and depressurizing, a throttling part II for removing impurities of the produced gas through opposite flow is arranged at the passage opening, and the valve core is provided with a throttling part III which protects the valve core through staged depressurization.

The invention discloses a wear-resistant and anti-scouring gate valve and aims at mainly solving the problems that an existing gate valve outlet valve seat is easily scoured and easy to wear to causepoor sealing performance. The wear-resistant and anti-scouring gate valve is characterized in that a notch groove is formed in the bottom of a gate plate; and the tops of the two ends of the notch groove are lower than the bottom of the inlet sealing surface and the bottom of the outlet sealing surface respectively. The wear-resistant and anti-scouring gate valve has the advantages that at the initial stage of opening the valve and lifting the gate plate, a flow channel is collectively formed among the notch groove at the bottom, the inlet valve seat and the outlet valve seat for medium circulation, so that the flow rate of a medium is lowered, damages on the outlet valve seat caused by wear and scouring with the medium are reduced, and reliable sealing between the outlet valve seat and the outlet sealing surface of the gate plate is guaranteed.

The invention discloses a smelting reduction furnace, which comprises: a horizontal furnace body, including a furnace shell, a water-cooled wall and a furnace lining which are sequentially stacked from the outside to the inside; A slag outlet is provided on the taphole and the other end wall, and a flue is arranged on the peripheral wall of the horizontal furnace body close to the taphole, and the taphole, the slag outlet, and the flue are respectively It communicates with the furnace hearth of the horizontal furnace body; the feeding unit includes a gas injector and a fuel injector, and the gas injector can movably penetrate into the furnace hearth from the top of the surrounding wall of the horizontal furnace body, so The fuel injector can movably penetrate into the furnace from the side of the peripheral wall of the horizontal furnace body. The smelting reduction furnace improves the smelting reduction reaction rate, the utilization rate of secondary combustion heat and the output efficiency of metallic iron, reduces the content of FeO and metallic iron in the discharged slag, and reduces the erosion of FeO in the slag to the furnace lining damage and prolong the service life of the furnace lining.

The invention discloses a self-conveying water-stone separation type flood drainage aqueduct and a construction method, and belongs to the technical field of disaster prevention and control for geotechnical engineering. The self-conveying water-stone separation type flood drainage aqueduct comprises an aqueduct inlet, an aqueduct outlet, a self-conveying aqueduct body, foundations, supporting columns and a water outlet pipe. The self-conveying aqueduct body is composed of a double-layer U-shaped channel, water turbines, driving wheels, driven wheels, belts and a conveyer belt, wherein the middle of the bottom of the upper layer of the double-layer U-shaped channel is provided with rollers, the two ends are provided with carrier rolls, the carrier rolls are provided with the driven wheels in a nesting manner, the water turbines are installed on the lower layer of the double-layer U-shaped channel and provided with the driving wheels in an embedding manner, the belts connect the drivingwheels with the driven wheels, and the rollers and the carrier rolls are sleeved with the conveyor belt. The foundations are built at the intersection of a gully and a highway, the supporting columnsare built on the foundations, the self-conveying aqueduct body is erected on the supporting columns and connected with the aqueduct inlet and the aqueduct outlet, and the water outlet pipe guides water into a gutterway. According to the self-conveying water-stone separation type flood drainage aqueduct, water and stones in a debris flow are largely separated, the kinetic energy of the water is utilized to drive the conveyor belt to convey the stones, the situation that stones settle in the aqueduct and block the aqueduct, the debris flow spills over, and the normal use of a line is affected isavoided, and the safety of pedestrians and vehicles is protected.