388 results about "Sluice gate" patented technology

The sluice gate valve includes at least one binding reduction mechanism to reduce binding during actuation of the sluice gate. In one embodiment the mechanism includes a the guide elements and the tracks, the guide elements and the tracks being arranged such that a predetermined amount of rotational motion of the gate around the stem is permitted during actuation of the valve to reduce valve binding. In another embodiment the mechanism includes a stuffing box assembly including a stuffing box, a bushing, and a collar, where a convex curved surface of the collar slides on a concave curved surface of the bushing such that a predetermined amount of pivoting of the stem up to a predetermined cone angle is allowed. In a preferred embodiment the sluice gate valve includes both mechanisms.

The invention discloses a deck-type discharge device which is arranged on a ship deck to operate, and comprises a discharge chute, a sluice gate, a round fish box, a buffer cap, a support frame, a water inlet pipe, a switch and an adjustment pad, wherein the round fish box is arranged on the support frame of the fish box, and is used for accommodating fish fries needed to be discharged; the water inlet pipe is fixed on a round ring below the support frame of the fish box; the discharge chute is arranged on the support frame of the chute, and is divided into an upper chute and a lower chute; one end of the upper chute is connected with the round fish box through a bolt nut; an intermediate groove is provided with the sluice gate; the other end of the upper chute is connected with the lower chute through the bolt nut; the other end of the lower chute extends out of the side of the ship, so as to lead the fish fries to be discharged into the water; the fish fries can be discharged only in need of lifting the sluice gate in the discharge operation; the bottom of the support frame is connected with the adjustment pad; and the height of the support frame can be adjusted by the adjusting pad, so as to keep the fish box to be relatively horizontal and place the support frame stably on the uneven deck. The deck-type discharge device can be used for improving the safety of discharge, and reducing the damage to the fish fries.

An integrated power system combining tidal power generation and ocean current power generation comprises: constructing barrages across the sea to make up a lake; installing turbine structures of a tidal power plant and sluice structures of a tidal power dam for generating electricity by using the potential energy difference between seawaters caused by tides and ebbs; forming an ocean current power park in a lake side by installing a plurality of ocean current generators, for generating electricity by using the flow of the seawater discharged through turbine generators, in a rear lake side of the turbine structures of the tidal power plant; and forming an ocean current power park in a sea side by installing ocean current generators, for generating electricity by using the seawater with the fast speed discharged into the sea through sluice gates, in a rear sea side of the sluice structures of the tidal power dam.

A fixing device includes an encircling element having left and right lateral sides and an intermediate portion that is formed with a notch and that is bent to form two limiting apartments at two sides of the notch, each limiting apartment having left and right walls extending integrally and transversely from a longitudinal axis of the encircling element and a middle wall interconnecting the walls that define an opening accessible only from a direction that is the same direction, each of the left and right lateral sides is formed with a retainer stub; a sluice gate having two notches disposed on the retainer stubs for denying access into the apartments; and a locking member extending through a through hole in the sluice gate and the notch in the encircling element for preventing untimely disengagement of the sluice gate from the encircling element.

There is provided with a complex ocean power system combining ocean current power generation for generating electricity by forming a plurality of ocean current generators in front and rear of sluice structures of tidal power dams and sluice power generation for generating electricity by forming a plurality of ocean current generators in sluice conduits of the sluice structures, comprising: constructing barrages, which cross over the sea, to make up a lake; installing sluice structures of tidal power dams between the barrages 10 to generate electricity by changing a potential energy difference between seawaters caused by tides and ebbs to kinetic energy; installing ocean current generators in front and rear of the sluice structures and in the sluice conduits of the sluice structures to generate electricity by rotating turbine blades using the flow of the incoming seawater from a sea side into a lake side during flood tide and the flow of the seawater discharged from the lake side into the sea side during ebb tide; and installing sluice gates in the sluice structures 102, 210 to close and open the sluice conduits during flood tide and ebb tide.

The invention discloses a hydraulic engineering sluice gate. The hydraulic engineering sluice gate comprises a door frame. A top plate is welded to the top of the door frame. The inner side face of the door frame is provided with limiting sliding grooves. The inner side of the door frame is provided with a door body. Limiting sliding blocks on the two sides of the door body are slidably connectedwith the limiting sliding grooves on the two sides of the door frame. A top frame is welded to the middle portion of the upper surface of the door body. Lugs are welded to the two sides of the upper surface of the door body correspondingly. According to the hydraulic engineering sluice gate, while the door body is lifted up and down through a lead screw, and the two sides of the top of the door body are pulled and lifted up and down through two steel wire ropes, so that the door body is stressed uniformly in the lifting process, stable in operation and high in safety; a horizontal shaft is driven to rotate through a single driving motor; during rotation of the horizontal shaft, the lead screw engaged with the horizontal shaft also rotates to lift the door body up and down, reels rotate todrive the steel wire ropes to pull the door body. The hydraulic engineering sluice gate conducts driving through the driving motor in the whole process, and the synchronism is high. Meanwhile, energyconsumption is reduced, and the design is reasonable.

The invention discloses an anti-freezing device for a sluice gate. The anti-freezing device is arranged in front of the gate, and comprises a submersible pump, a jet pipe, multiple guide pulleys and a fixed winch, wherein a guide pulley is arranged on the top of each gate pier upstream face; the submersible pump and the jet pipe which is horizontally arranged in front of the gate are arranged in water in front of the gate; the fixed winch is arranged in a control building on the shoreside; the fixed winch is connected with the multiple guide pulleys through a main steel wire rope; the jet pipe is respectively connected with the main steel wire rope through the guide pulleys according to multiple auxiliary steel wire ropes, so that the fixed winch is started to drive the main steel wire rope to adjust the depth of the jet pipe and the submersible pump in the water; the jet pipe is a straight pipe; a plurality of upward jet pores are drilled on the pipe; and the submersible pump is communicated with the jet pipe. According to the device, the water body in front of the gate panel can be prevented from being frozen, the damage of ice pressure on the gate is avoided, the service life of the gate is prolonged, and the maintenance and repair cost of the gate is saved.

The invention discloses an automatic container loading and unloading wharf. A sluice gate, a container yard, an on-site transfer vehicle operating area and a bridge crane operating area are sequentially distributed in the direction from a land side to a sea side. The container yard is arranged along the direction perpendicular to a coastline; and a seaside interaction area is designed on one side,close to the coastline, of the yard, and a land side interaction area is designed on one side, far away from the coastline, of the yard, so that a walking path of an off-site transportation vehicle and a walking path of an on-site transfer vehicle are completely separated, and the problem that on-site road congestion and forced interruption of an operation flow are easily caused by crossed walking paths of the two vehicles is solved. In addition, the invention designs a background system for automatically controlling a rail-mounted gantry crane and the on-site transfer vehicle for carrying out container lifting and storing operation and loading and unloading operation, so that the overall operation efficiency of the wharf can be improved, the error rate is reduced, and the intelligent level of the container wharf is remarkably improved.

The invention relates to a potential energy converting device of a novel hydraulic piston pump. Most conventional piston pumps are driven by motors or diesel engines and have deficiencies of needing to use electricity, diesel, and the like. Therefore, the potential energy converting device comprises a piston pump mechanism, wherein the piston pump mechanism comprises a cylinder body and a piston; a fluid material inlet pipe and a fluid material outlet pipe are arranged on the cylinder body; and check valves are arranged on both the fluid material inlet pipe and the fluid material outlet pipe. The potential energy converting device is characterized in that the potential energy converting device further comprises a gravity water container and a resetting device, wherein the gravity water container is connected with the piston through a pull rope or / and a connecting rod; a water filling pipe and a valve are arranged above the gravity water container; a water outlet and a sluice gate are arranged on the gravity water container; and a sluice gate triggering device is arranged on the gravity water container in a matched manner. The potential energy converting device of the novel hydraulic piston pump, which is disclosed by the invention, has the advantages of reasonable design and simple and practical structure, and utilizes the gravity or buoyancy force of water with a certain water level difference to do work to increase the pressure intensity of fluid, thereby achieving the aims of water lifting, refrigeration, heating, power generation, and the like and serving the humankind.

The invention discloses an origin-destination (OD) estimation method for the traffic demand of a port roadway based on freight processes. The method is based on an activity theory, the entire freight logistics procedure is taken as a research unit, the main traffic generation and attraction point of a harbor district is taken as a starting point, and the typical freight logistics procedure of cargo vehicles in the harbor district is taken as an analysis object. Under the precondition of obtaining these basic data which are the basic parameters of the storage yards of the harbor district, the flow rate of each egress and ingress sluice gate in the harbor district and the collecting and distributing proportion of a dock roadway, the cargo quantity of each storage yard and the cargo collecting and distributing quantity of the dock roadway are estimated, the attraction intensity of each sluice gate, each storage yard and each dock in the harbor district is analyzed, the selective probability of different travelling routes of different freight process modes is also calculated, the generation and attraction quantity of each OD pair of the harbor district is estimated so as to obtain an OD matrix for the traffic generation and attraction of a port roadway, finally a macroscopic model of the harbor district is constructed by utilizing a VISUM, the OD of the harbor district is inversed according to the measured flow rate, and the relative error of the OD matrix and the OD is compared so as to verify the reliability of model estimation.

The invention discloses a distributing well with a double flaps sluice gate and a drainage system and a drainage control methods thereof, which is of an intelligent drainage effect. Reasonable water discharging is achieved by reasonably controlling the opening of a double flaps sluice gate of the drainage system through a control system, sewage and initial rainwater are enclosed to a storing and regulating facility to the most extent, while flood discharging is guaranteed. The drainage control methods comprise a water level method, a water quality method, a water quality-water level method, atime method, a total amount method, a rainfall method, a time-water level method, a total amount-water level method, and a rainfall-water level method. The phenomenons of water current cannot be limited in a intercepting sewer, and clean water and later rainwater are sent to a sewage treatment plant through an intercepting sewer of the prior art are effectively solved by the regulating of the methods. The sewage is enclosed to the storing and regulating facility to the most extent, and cleaner water is discharged to natural water body by reasonably controlling discharging routes of the sewage,the initial rainwater and the mid-term and later rainwater.

A fixable-seal sluice gate has a valve vise (18, 19, 25, 26, 31, 32) that forces a sluice-gate valve uniformly and tightly in sealing-surface contact with a domed seal ring (4) that is fixable conveniently and removably intermediate a sluice-gate plate (3) and a sluice-gate wall (1) of a sluice-gate flange that encompasses a valve side of a sluice-gate aperture (2). A plate locator on the valve vice sets the sluice-gate plate in predetermined sealing-contact position for select structure of the fixable-seal sluice gate. The domed seal ring is a plastic material such as Hypalon(R) having predetermined toughness to resist particle embedment in combination with having predetermined softness for select uses and objectives. A dome flange (5, 6) on one or both sides of a base of the domed seal ring is bracketed removably to optionally the sluice-gate wall or the sluice-gate plate for rigid, reliable, long-enduring and yet quick and convenient attachment and detachment of the domed seal ring.

The invention relates to a large span sluice gate dual-hanging point hoist machine, in particular to a large span sluice gate dual-hanging point hoist machine used for the hydraulic engineering, and comprises a motor, a speed reducer which is connected with the motor by a brake, a reel, a fixed pulley, a movable pulley which is connected with the sluice gate hanging point, a central small gear which is rigidly connected with the low speed driving output axis of the speed reducer, and a big gear which is meshed with the central small gear; wherein, the big gear and the reel which is winded with the steel rope controlling the lifting and the descending of the sluice gate by the fixed pulley and the movable pulley form the integrated structure. The invention is only provided with a driving mechanism, does not need a long shaft drive and solves the problem of the rigidity deficiency of a middle drive shaft in the conventional large span hoist machine.

The invention discloses a steel hydraulic river sluice which comprises a control system and a plurality of sluice gate units. Each sluice gate unit comprises a secondary concrete sluice gate groove, amain anchor bolt embedded part, a sluice gate body, a sensor, an oil cylinder, a swing oil cylinder, a hydraulic system and a limiting switch. All the sluice gate bodies harmoniously move on the whole. According to the river sluice, rising and falling of the multiple sluice gate units are automatically controlled; during outage caused by flooding, hydraulic oil can be pressed back to an oil tankthrough the self-weight of water, and the water level is controlled to achieve safe flood discharge; through the combined-type design, the installation process is simplified, no middle sluice pier isneeded, and maintenance is easy, convenient and feasible; the arc-shaped sluice gate bodies and a stiffened plate can effectively smoothen a water flow; the sluice is supported through the oil cylinders and the swing oil cylinders, and a foundation is simple; no mechanical bearing is needed, no guiding groove is needed so that a water seal cannot be blocked by sand entering of the guiding groove,and no space is occupied by a hydraulic arm; and information collected by the sensors is transmitted to the control system, and the control system sends an instruction to the hydraulic systems to automatically control the oil cylinders to adjust the elevation angles, namely the water retaining heights, of the sluice gate bodies.

The invention discloses an automatic cleaning machine for sluice gate guide rails of a frame-type PX pump station. The automatic cleaning machine comprises a frame, longitudinal cleaning systems, a transverse cleaning system, and a control system, wherein the frame is embedded into the sluice gate guide rails and capable of sliding up and down along steel angles in the sluice gate guide rails; the longitudinal cleaning systems are disposed at two sides of the frame respectively, and used for cleaning the guide rails on the two sides and a vertical surface of a rectangular sealing frame on a wall; the transverse cleaning system is assembled below the frame, and used for cleaning a lintel and a bottom sill; and the control system is used to control working of the longitudinal cleaning systems and the transverse cleaning system. The automatic cleaning machine for sluice gate guide rails of a frame-type PX pump station has the advantages as follows: the machine can be installed simply and conveniently in the same way as the sluice gate; the sluice gate can be allowed to enter the water smoothly for sealing; the key technical problems of inspection of the guide rails and the sealing frame are effectively solved; and the effect of longitudinal comprehensive cleaning by entering the water once is achieved. Furthermore, long-distance cross sliding is realized simply and effectively. Pipeline twining is avoided. Separation of the machine from the guide rails is avoided.

The invention provides a quick soil pressure sensor replacing device which comprises a sleeve, a sensor installation seat, a sluice gate installation seat, a sluice gate, a closing oil cylinder and atelescopic oil cylinder, wherein the inside of the sleeve is hollow, the sensor installation seat shares the same central axis with the sleeve and is detachably arranged in an inner cavity of the sleeve, the sluice gate installation seat is arranged on the sleeve in the radial direction of the sleeve, the sluice gate is arranged on the sluice gate installation seat and can seal the inner cavity ofthe sleeve in the radial direction, the closing oil cylinder is used for controlling the sluice gate to be opened and closed, and the telescopic oil cylinder is connected with the sensor installationseat and can control the sensor installation seat to move in the axial direction of the sleeve. The quick soil pressure sensor replacing device disclosed by the invention has the advantages of high automation degree, simple structure, convenience in control, ability in quickly and safely replacing a soil pressure sensor under the situation that a soil warehouse is under pressure, good sealing effect, high safety and ability in improving soil pressure sensor replacing efficiency.

The invention discloses a dam-break circulation water tank which comprises an experimental water tank, a dam-break gate, a water storage tank, a drainage gate, a pump tank, a circulation water pump, awater inlet pipe, an upstream water injection pipe, a downstream water injection pipe, a drainage pipe and a water guiding pipe. The dam-break gate is arranged in the experimental water tank, and isperpendicular to the direction of water flow in the experimental water tank. The water storage tank is located directly under the experimental water tank and is connected with the water outlet of theexperimental water tank. The drainage gate is located in the experimental water tank and is near the water outlet of the experimental water tank. The pump tank is located on the side of the water storage tank and is connected with the water outlet of the water storage tank, and the absolute elevation is smaller than the absolute elevation of the water storage tank. The water inlet pipe, the upstream water injection pipe, the downstream water injection pipe and the water guiding pipe are connected through four-way connection, and the circulation water pump is connected with the water guiding pipe. According to the invention, the device can complete dam-break repeated experiments efficiently and conveniently, and can be used for a wave making experiment and a uniform water flow circulation experiment; the function of gradient adjusting can work well with each hydrodynamic experiment; and the applicable range is greatly improved.

The invention discloses a sluice safety monitoring system based on a wireless network and belongs to the field of waterway engineering safety monitoring. The sluice safety monitoring system comprises an acquisition system, a data transmission system, a remote monitoring scheduling system. The data acquisition system comprises a parameter acquisition node, a video acquisition node, a routing node and a coordinator node. The remote monitoring scheduling system comprises a database server system and a monitoring scheduling center. An environment parameter, a structure parameter and video data of a sluice are acquired, transmitted, processed, displayed, controlled and the like by the wireless acquisition and wireless transmission technologies, and a sluice gate is opened and closed according to an operating regulation. A wireless sensor network technology, a 3G (third generation) wireless communication network technology and a video monitoring technology are applied to sluice management, operations ranging from information acquisition, transferring, storing to processing are performed by digital information and images, and accordingly efficiency and safety of sluice management are increased greatly.

The invention discloses a novel sluice bucket type flow-dividing and energy-dissipation scour prevention technology. The technology comprises five parts, i.e., the overall design thought, the type selection of a section simulating hydraulic model, the verification of an integral simulating hydraulic model, the observation of an original model, and the comparison of economic technology, and the like. The design of the invention has eight most important key parts, i.e., the frontal edge width B1 of a pier, the top width B2 of a tail end, the bottom width B3 of the tail end, the inverted arc radius R of the upstream face of the pier, the flip shot angle Theta, the pier height P, the number of the pier, and the top space B4 between the tail ends of the piers, and the like. The design method of the sluice bucket type flow-dividing and energy-dissipation scour prevention technology is divided into two major parts, i.e., the body form design and the distribution of the piers. The bucket type flow-dividing pier designed in the way is characterized by low downstream water level, high energy consumption rate in ordinary flow flood discharging working condition, small stilling pool depth, short pool length, less workamount, low investment, and the like.

The invention discloses a round middle ring water and sand separating device, which comprises a direct culvert pipe communicated with an inlet channel, and a sand basin provided with a water outlet and arranged in the sealing ring of an annular catchment channel. A through hole arranged on the top surface of the direct culvert pipe arranged in the sand basin is communicated with the water outlet of the sand basin; the connector of the direct culvert pipe and an annular sand sluicing canal is provided with a sand sluicing gate in the sand basin; a sand sluicing culvert pipe connected with the annular sand sluicing canal passes through the lower part of the annular catchment channel, and the outlet of the annular sand sluicing canal is connected with a sand sluicing channel; the sand sluicing channel is provided with an outer sand sluicing gate; an annular water blocking wall hanging into the sand basin is supported and fixed on the inner weir wall of the annular catchment channel; and filtering devices are evenly arranged on the water surface between the bottom of the annular water blocking wall and the inner weir wall of the annular catchment channel. The invention has good water and sand separating effect on sand-carried stream, little desanding time and little water consumption of sand sluicing, can realize continuous water supply, has good water filtering effect, can separate sand with smaller particles and suspended particles in sediment water in a sedimentation basin, thereby improving the water supply quality.

The invention relates to a project and a method for controlling flood in rivers. The method comprises the following steps: water drainage sluice gates are built on an embankment of a river at intervals, and when the waterline of the river is over a safety line, the sluice gates are opened to drain water; or pipes are used at intervals, and the water in the river is extracted to the outside of the embankment of the river by using a siphon method or other methods; or the branches of the river are built, and the flood in the river flows into the branches when the flood comes, thereby reducing water yield of a main riverway so as not to cause the main riverway to break down to bring out the flood damage at a large range. The invention relates to a method for controlling drought, which refers to drain the water at a peripheral large range area of a region where the drought occurs or at nationwide areas when earth is in the drought, i.e. any available water resources such as the rivers, reservoirs, ground water and the like are released on the ground, thereby generating more cloud and rain to moist the land.

The invention discloses a surge-type special cylinder cleaning machine. The surge-type special cylinder cleaning machine comprises a machine case, a surge water tank, a roll-over stand, an inner water tank, a drive component and an electrical cabinet. The surge water tank is communicated with the inner water tank through a sluice gate. The roll-over stand is rotatably arranged in the surge water tank. The roll-over stand is driven by a roll-over reducer. A plurality of aligned spraying cleaning pipelines are fixed on the periphery of the roll-over stand in the surge water tank, and the roll-over stand is provided with a plurality of limiting plates used for limiting a cylinder to be cleaned. A discharge conveying roller is arranged at the bottom of the roll-over stand. Aligned oil duct cleaning pipes are arranged on the positions, corresponding to oil duct holes of the cylinder to be cleaned, of the surge water tank. When the surge-type special cylinder cleaning machine is used for cleaning, the roll-over stand drives cleaning water in the surge water tank to achieve surge-type cleaning; meanwhile, the spraying cleaning pipelines perform spraying cleaning on the cylinder to be washed by spraying the cleaning water, and therefore the surge-type special cylinder cleaning machine has the advantages of being good in cleaning effect and free of cleaning dead corners.

A replaceable module for capturing amalgam and mercury from the waste water disposal system of a dental office, in which the waste water flows into a settling chamber, overflows from the settling chamber into a magnetically-assisted sluice, and then after being further cleaned by the sluice, flows on to a sewer connection.

The invention relates to a containment structure of a floating nuclear power plant. The containment structure includes a containment body, and is characterized in that the containment body is internally equipped with a loop area and a refueling area, the loop area includes a main coolant system compartment and a loop subsystem compartment that area interconnected, a steam generator and a voltage stabilizer of the main coolant system are arranged on one side close to the containment front wall, a loop subsystem is disposed in the compartments on both sides of a suppression water tank, the refueling area includes a spent fuel storage pool, a suppression pool and a reactor chamber, the suppression pool is located between the spent fuel storage pool and the reactor chamber, the suppression pool, sluice gate equipped partition walls are disposed between the suppression pool and the spent fuel storage pool and reactor chamber respectively, discharge pipelines are laid vertically in the wallbetween the loop subsystem compartment and the suppression pool, and the upper ends of lower ends of the discharge pipelines are respectively connected to the loop subsystem compartment and the suppression pool. The containment structure of a floating nuclear power plant provided by the invention has the advantages of compact structure, reasonable layout, good suppression effect, simplification ofrefueling process and improvement of refueling safety.

The invention discloses an on-line state monitoring control method and a monitoring system for a hydropower station sluice gate. The method comprises the following steps: a usage and operating state of the sluice gate is monitored in real time through a sluice gate control cabinet, a sluice gate motor frequency converter and a sensor arranged on the sluice gate; monitored data is transmitted to adata acquisition instrument via the sensor; the controller is used for reading and recording data signals from the data acquisition instrument, the sluice gate control cabinet and the sluice gate motor frequency converter respectively, performing spectrum analysis on the data signals, extracting signal characteristic values of the data signals of all test points from spectrum analysis results, establishing an early warning mathematical model, achieving real-time monitoring and control of the sluice gate, and giving early warnings upon occurrence of exceptions of the sluice gate. The on-line state monitoring control method and the monitoring system are characterized by ability to reduce the maintenance cost and improve troubleshooting speed.

The invention relates to an arc-shaped terrace beam sluice gate with a layered water intake function and a working method thereof. The sluice gate comprises the arc-shaped terrace beam sluice gate, anarc-shaped sluice gate slot, a fixed pulley, a hydraulic hoist, a rotating shaft, a hoist rod and an electric motor; the arc-shaped terrace beam sluice gate comprises a first arc-shaped sub sluice gate, a second arc-shaped sub sluice gate and a third arc-shaped sub sluice gate; and the third arc-shaped sub sluice gate is provided with a third cavity which can accommodate the insertion of the second arc-shaped sub sluice gate, the second arc-shaped sub sluice gate is provided with a second cavity which can accommodate the insertion of the first arc-shaped sub sluice gate, the first arc-shapedsub sluice gate is inserted into the second cavity of the second arc-shaped sub sluice gate, and the second arc-shaped sub sluice gate is inserted into the third cavity of the third arc-shaped sub sluice gate. According to the arc-shaped terrace beam sluice gate with the layered water intake function, the overall movement of the terrace beam sluice gate is controlled through the hydraulic hoist, lifting of the first arc-shaped sub sluice gate is controlled through the electric motor, and layered water intake and surface water intake of the arc-shaped terrace beam sluice gate are realized. Thehydraulic hoist is used for controlling whole movement of the terrace beam sluice gate to the height of flood scouring and silting, and a function of flood scouring and silting of the terrace beam sluice gate is realized.

The inventions relates to an extrusion apparatus suited for water-containing products which heat-expand by internal boiling of water by pressure relief after passing through extrusion nozzles. The apparatus comprises a) an extruder, which at the outlet end thereof comprises a nozzle plate, b) a pressure-controlling chamber for controlling the pressure on the outlet side of the nozzle plate, said pressure-controlling chamber possibly containing a cutting-off unit, and c) a sluice unit downstream of the pressure controlling chamber. The apparatus furthermore comprises that the pressure-controlling chamber and sluice unit being releasably interconnected and at least the sluice unit being mounted movably in and out of the product stream. Hereby may the apparatus start up without connecting the sluice and easily connecting the sluice, when the product is sufficiently stable for the correct function of the sluice, so that the problems during start-up of the apparatus, such as the unstable and the relatively wet products tendency of blocking the sluice is substantially avoided.

The invention discloses a nuclear power spent fuel pool sluice gate, which comprises a gate frame and a gate leaf, wherein the gate leaf is fixedly arranged in the gate frame via a set of hinge devices; the gate leaf is provided with a set of fastening devices; the gate leaf is provided with a gate leaf driving device; the junction of the gate frame and the gate leaf is provided with a layer of sealing element; and a set of reinforcing ribs is arranged in the gate leaf. The nuclear power spent fuel pool sluice gate disclosed by the invention has the advantages of flexibility in opening and closing, shock and pressure resistance and low leakage rate.

The invention provides an undershot sluice gate (17) to control flow of liquid through an open channel (10). The gate (17) includes a gate leaf (18) adapted to be raised and lowered by a control means (22) to allow flow of liquid along open channel (10). Gate leaf (18) has at least a pair of opposing liquid level sensors (44, 46) on, or in, gate leaf (18) to provide measurement of liquid level upstream and downstream of gate leaf (18). The sensors (44, 46) are located at a predetermined distance from the lowermost edge of gate leaf (18) to allow said measurements without disturbance from the fluid flow profile resulting from movement of liquid beneath the lowermost edge of gate leaf (18).