Power generation system in navigation lock

FIELD: electricity.

SUBSTANCE: power generation system of navigation lock contains the navigation lock chamber for connection of the first navigation reservoir with high water level and the second navigation reservoir with low water level, a flow-through passage with the turbine and holes, at least one hole for each reservoir respectively and two holes at the navigation camera of the lock, and also the lock control unit the first output of which is connected to the turbine. The navigation chamber of the lock has a pair of gates with the drives respectively for their opening and closing. The system is additionally fitted with reservoir water level sensors with high and low water level and the navigation chamber water level sensor of the lock the outputs of which are connected respectively to the inputs of the control unit of the lock. The holes are fitted with shutters with actuators. The control inputs of actuators of shutters and gates are connected to outputs of the control unit of the lock. The turbine is placed in the flow-through passage between the input and output holes of the navigation chamber of the lock.

EFFECT: simplification of power generation system of navigation lock.

1 dwg

 

The invention relates to the field of power generation during the change of water levels in the shipping gateways.

A gateway is navigable hydrotechnical structure located between water bodies with different levels, through which pass judgment. Gateway erected in river waterworks, canals and ports, the areas of which are subject to ebb and flow with large amplitude levels. Many major gateways built in the waterworks on the Volkhov river, the Dnieper, the Svir river, the Volga, the Kama, on many navigable canals, reservoirs. A significant number of major gateways built in the U.S., for example, on the rivers Ohio, Mississippi, ST. Lawrence and others.

Known counterparts - gateways (Mikhailov A.V. Shipping gateways. M., 1966), containing the camera, the head pieces and approaches. The chamber in which are raised (lowered) the court, formed by two longitudinal walls and bottom that are performed, usually made of reinforced concrete; the ends it is limited to metal gates positioned within the respective head parts. The number of cells in series are distinguished gateways single-chamber and multi-chamber (multi-stage). Filling and emptying of the chambers is equipped with paddles of water supply devices (power system gateway).

In head cha�threads are specified gate, support the difference in water levels (upstream) and low level (downstream) and providing for the passage of vessels when levels aligned adjacent the tailrace, the mechanisms for control of equipment and system automatic control.

The disadvantage of devices-analogues is that the energy of the high pressures between the upper and lower tailrace is not used when filling the chambers with water and emptying them.

Known system (prototype) for generating electrical energy in the shipping gateway (patent RF №2339764, the authors desi Norman, Pekka Virta, "power Generation in the shipping gateway") containing at least one navigation lock to connect the first navigable body of water and the second navigable body of water, and navigation lock has a pair of gates to implement the passage of vessels in navigation lock even when the gates are alternately opened and closed at least one passage for fluid connecting the navigation lock at least one from the first reservoir and second reservoirs to ensure water flows directly between the gateway and at least one of the first and second reservoirs, a turbine placed in communication with the fluid in the passage for the fluid with the possibility of generating electrical energy when�and the water passes through, at least one passage for fluid to flow between the gateway and shipping at least one of the first and second reservoirs, and a control turbine controller, arranged to control the speed of flow in the drainage of water through the turbine so that it was within the specified range of flow velocities, defined as a function of one or more of the requirements in relation to the time of transfer of water, the maximum turbine performance and capacity requirements of the network.

This system (prototype) for generating electrical energy based on the text material and drawings of the patent has the following drawbacks. First, each gateway contains two turbines (number of gates). Secondly, the first of turbines only work when content gateway, the second turbine works when emptying the gateway, and the first turbine when it is idle.

The technical problem solved by the proposed device is to simplify the system of electricity generation in the shipping gateway. The technical effect is to provide each of the lock chamber with one turbine.

In the solution of the technical problem specified technical effect is achieved in that known system of power generation in the shipping gateway that contains at least one navigable camera gateway with�connection of the first navigable waterfront with high water level and the second navigable water reservoir with low water level, moreover, the shipping lock chamber has a pair of gate actuators, respectively, for opening and closing, as well as water-carrying passage with the turbine and holes, at least one opening of the reservoirs respectively, and two holes at the shipping lock chamber, and a control unit gateway, the first output of which is connected to the turbine, further provided with a water level sensor of the reservoir high water level, a water level sensor of the reservoir with low water level and a water level sensor navigation lock chamber, the outlets of which are respectively connected to inputs of the control unit, gateway, the holes made with the dampers with actuators, respectively, wherein control inputs of gate drives and actuators of the valves are connected to the outputs of the control unit of the gateway, and the turbine is placed in the conduit passage between the inlet and the outlet of the navigable camera gateway.

The drawing schematically shows a General view of the proposed system of power generation in the shipping gateway in the section.

The system of electricity generation in the shipping gateway comprises at least one navigable chamber 1 gateway to connect the first navigable water body 2 with a high water level and the second shipping of the reservoir 3 with a low level of water, and navigable camera 1 gateway has a pair of gates 4 and 5 � actuators 6 and 7 respectively for opening and closing and culvert passage 8 with the turbine 9, made of, for example, in the form of capsule hydrogenerator (voldek A. I. of the Electric machine. 2 ed., revised and enlarged, publishing house "Energy", Leningrad branch, 1974, p. 372), and holes 10, 11, 12 and 13, at least one opening 10, and 11 ponds 2 and 3 respectively and the two holes 12 and 13 at shipping camera 1 gateway and unit 14 of the management gateway, made of, for example, in the form of the controller, the first output 15 of which is connected to the turbine 9. The system is further provided with a sensor 16 water level of the reservoir 2 with a high water level sensor 17 water level of the reservoir 3 with low water level and the sensor 18 of navigable water level of the chamber 1 gateway, the outputs of which are connected respectively to the inputs 19, 20 and 21 of block 14 management gateway, the holes 10, 11, 12 and 13 are formed with flaps with actuators 22, 23, 24 and 25, respectively, while the control inputs of the actuators 6 and 7 gates 4 and 5 and the actuators 22, 23, 24 and 25 of the valves are connected respectively to the outputs 26, 27, 28, 29, 30 and 31 of the control unit 14 of the gateway, and the turbine 9 is placed in the culvert passage 8 between the two holes 12 and 13 of the shipping chamber 1 gateway, designed as the outlet 12 and an inlet 13.

The process of passing vessels through the gateway (i.e., sluicing) consists of a series of successive operations (opening and closing woro� and paddles, the filling of the chambers with water and emptying, Deposit and withdrawal of vessels, etc.).

The system of electricity generation in the shipping gateway works as follows. Consider the process of filling a shipping camera 1 gateway, starting from the moment when water levels in navigable camera 1 gateway and the reservoir 3 with a low water level is the same that determines the control unit 14 of the gateway based on signals from sensors 17 and 18 the water level. When the gate 5 is opened, and the gates 4 are closed. At the beginning of the filling process of shipping the camera 1 gateway unit 14 management gateway instructs the actuator 7 for closing the gate 5, the actuators 23 and 24 for respectively closing flaps of the opening 11 and the outlet 12 and simultaneously the actuators 22 and 25 on the opening of the shutters opening 10 and the inlet 13. The water flows through the hole 10 that passes through the turbine 9, which generates electricity in the network, and then through the inlet 13 fills shipping chamber 1 gateway (solid arrows). In the filling process on the signals from sensors 16 and 18 of block 14 management gateway detects the water level when the pressure is insufficient to generate electricity, and gives the command to the actuator 24 to the opening of the valve hole 12, which provides a more intensive filling of navigable camera 1 gateway. At small difference in water levels of the reservoir 2 and the navigation camera 1 gateway unit weprovide gateway instructs the actuator 6 is small, the partial opening of gate 4, what increases the intensity of fill in navigable camera 1 gateway. In the absence of differential water levels of the reservoir 2 and the navigation camera 1 gateway unit 14 management gateway instructs the actuator 6 on the full opening of the gate 4.

The process of emptying shipping camera 1 gateway is implemented in the following sequence. Unit 14 management gateway instructs the actuator 6 for closing the gate 4, the actuators 22 and 25 on the closure flaps respectively opening 10 and the inlet 13 and simultaneously the actuators 23 and 24 to the opening flaps respectively of the opening 11 and the outlet 12. The water flows through the outlet port 12, passes through the turbine 9, which generates electricity in the network, and then through the opening 11 and flows into the reservoir 3 with low water level (dashed arrows). In the process of emptying of the chamber 1 gateway based on signals from sensors 17 and 18, block 14 management gateway detects the water level when the pressure is insufficient to generate electricity, and gives the command to the actuator 25 to open the valve holes 13, which provides a more intensive emptying shipping camera 1 gateway. At small difference in water levels of the reservoir 3 and shipping camera 1 gateway unit 14 management gateway instructs the actuator 7 in a small open gate 5, which increases the intensity of emptying shipping camera 1. If the said�tvii drop in water levels of the reservoir 3 and shipping camera 1 gateway unit 14 management gateway instructs the actuator 7 for the full opening of the gate 5.

The task is solved by the proposed device. The system of electricity generation in the shipping gateway is simplified, and hence cheaper, since one and the same turbine generates electricity as when filling the shipping lock chamber, and in the event of evacuation.

The system of electricity generation in the shipping gateway, containing at least one shipping a lock chamber for connecting the first navigable waterfront with high water level and the second navigable water reservoir with low water level, and the shipping lock chamber has a pair of gate actuators, respectively, for opening and closing, as well as water-carrying passage with the turbine and holes, at least one opening of the reservoirs respectively, and two holes at the shipping lock chamber, and a control unit gateway, the first output of which is connected to the turbine, wherein she is further provided with a water level sensor of the reservoir high water level, a water level sensor of the reservoir with low water level and a water level sensor navigation lock chamber, the outlets of which are respectively connected to inputs of the control unit of the gateway, the holes made with the dampers with actuators, respectively, wherein control inputs of gate drives and actuators valves respectively connected to the outputs of block �of the Board of the gateway, and the turbine is placed in the culvert passage between the two openings of the shipping lock chamber, designed as the outlet and inlet.



 

Same patents:

FIELD: power industry.

SUBSTANCE: invention refers to hydroelectric power industry, particularly to methods of small river and artificial flow utilisation for electric power generation. Method of midget hydroelectric power plant construction involves construction of hydroelectric aggregates in the form of converters of kinetic water flow energy to potential hydraulic shock energy, and rotating drive of electric power generators. Water ducts of hydroelectric aggregates feature walls moving in radial direction and injectors with actuators driven in reciprocal motion by water duct walls moving in radial direction. Electric power generator drive is made in the form of propellers rotated by energy transferred from injectors to propellers by intermediate energy carrier, a work medium other than water.

EFFECT: simple method of midget hydroelectric power plant construction in low-intensity water flows.

4 cl, 1 dwg

FIELD: power industry.

SUBSTANCE: at implementation of a construction method of OTPP combined with SP 1, all the component parts of the object being built in the form of ready-made reinforced concrete or metal blocks from the works to the assembly site are delivered by means of a float-on method. Sequence of construction work is started from an earlier installed supporting and restricting barrier consisting of a metal, reinforced concrete or wooden grooved pile projecting in an underwater position through the height sufficient for fixed retention of flooded threshold blocks with orthogonal turbines 4, including foundation of SP 1. First, assembly of the foundation is started by afloat attachment into a common structure of a rectangular shape, the margin of buoyancy of which is sufficient for retention of posts for laying of board panels. Assembly of SP 1 is completed by installation of double-leaf gate 7. Gate 7 is left open till completion of work on installation of threshold blocks with turbines 4 connected through shafting 5 to generators 6 installed on the shore.

EFFECT: construction of HPP on navigable rivers, where it is impossible to erect dams and flood gates as per local conditions.

3 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: hydraulic pulse lift includes feed pipe 1, guide case 2 with vanes 3 forming centripetal drain channels 4, vanes 5 positioned under the channels 4 and forming centripetal pressure channels, and rotor wheel 8 mounted on shaft 22 and featuring main 10 and additional blades forming drain 11 and pressure-head centripetal channels of hydraulic turbine wheel stage, so that outlet of channels 11 enters diffuser of suction pipe 26, with radial blades of centrifugal pressure-head pump stage of wheel positioned above pressure channels. At the level of vanes 5 forming centripetal pressure channels, feed pipe 1 features systems 27 of insulated electrodes with positive intensity of electric hydraulic impulse discharge device, installed in spiral or circle and connected with rotating switch 32 with low-speed high-voltage generator 31. Both are mounted on the common shaft 22. Negative electrodes in the form of metal blade fins 15 are installed in centripetal pressure channels of wheel 8 and connected to the earth.

EFFECT: improved output parameters and possible fluid supply and pressure at hydraulic pulse lift output.

2 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: invention is related to hydraulic machine building in terms of renewable power sources. A hydraulic pulser comprises a feed line 1, a guide vane 2 with blades 3 forming centripetal drain channels, blades set above the said channels and forming centripetal pressure channels 6, and an impeller 8 with blades 10 forming drain and pressure centripetal channels 11 and 14 of a hydroturbine stage of the impeller, the channels 11 lead out to the draft tube 26 with the radial blades of centrifugal pressure pump impeller stage being set above the channels 14. The output diameters of the impeller blades in the centrifugal pump stage are less than the outer diameters of the impeller blades in centripetal hydroturbine stage.

EFFECT: invention is aimed at the provision of design output parameters and possibility to regulate the supply and head of fluid at the hydraulic pulser output.

4 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: invention is related to hydraulic machine building in terms of renewable power sources. A hydraulic pulser comprises a feed line 1, a guide vane 2 with blades 3 forming centripetal drain channels, blades set above the said channels and forming centripetal pressure channels 6, and an impeller 8 with blades 10 forming drain and pressure centripetal channels 11 and 14 of a hydroturbine stage of the impeller is mounted on a shaft 22, the channels 11 lead out to the diffuser of a draft tube 26 with the radial blades of centrifugal pressure pump impeller stage being set above the channels 14. Electromagnets are set in the blades of the guide vane 2. The electromagnet windings are connected to a current source via a current reverse switch 32, the current source is installed on a common shaft 22 with a low-speed generator 31. The generator 31 contains a rotor position sensor. Permanent magnets 16 are installed in the cavities forming channels 11 and 14 of the impeller 8.

EFFECT: invention is aimed at the provision of improved output parameters and possibility to change the supply and head of fluid at the hydraulic pulser output.

2 cl, 7 dwg

FIELD: transport.

SUBSTANCE: flying collector for atmospheric water includes main fabric canvas, boundary toroidal balloon attached to it, rope bracing of attachment to lifting aerostat and captive cable. Main fabric canvas of collector is made as surface of rotation with increasing generatrix inclination to plane perpendicular to axis of rotation when approaching to this axis. Interior of boundary toroidal balloon and lifting aerostat is connected by fabric tube with valve. stiffness of structure is provided by boundary toroidal balloon supercharged with gas from lifting aerostats.

EFFECT: portable and quick-deployable device can be used in liftable and high-mountain parts of renewable energy and fresh water sources.

2 dwg

FIELD: electricity.

SUBSTANCE: method to produce electric energy includes installation of two non-polarised electrodes in a zone of continuous water flow in a sea or river at a distance from each other and from the bottom. Current-collecting lines are connected to the electrodes to transfer a difference of values of natural electric field potentials between the electrodes to a coastal station of electric energy collection. At the station they sum up the difference of potentials from all such pairs of electrodes, convert into AC and send to consumers.

EFFECT: provision of the possibility to produce electric energy by simple means.

FIELD: construction.

SUBSTANCE: invention relates to hydraulic engineering and may be used in construction of hydraulic power plants in any area. The method includes construction of a cascade of water reservoirs with small capacity that are built at side river affluents, in area folds or in ravines, aside from the main river bed. Water reservoirs and their dams are arranged at one or both sides of the river at such distance from each other so that water horizons of each subsequent water reservoir of the cascade, starting from the river head, are lower than the bottom of the previous one. All water reservoirs of the cascade are connected to each other by discharge water conduits, water intakes of which are arranged in the lowest points of the dam of the previous water reservoir, and the end, with a hydraulic turbines or hydraulic turbines, for instance, active, cone and generators, on the dam or shores of the subsequent water reservoir, with drainage of water in it from the turbines. The first water intake of the HPP cascade is made, for instance, as a side one from the main river bed.

EFFECT: invention provides for river protection as an HPP is constructed on it in its original form, reduced adverse effects from water reservoirs, preserved ecology of the area, where the HPP is being built, provides for the possibility to obtain high HPP capacities from the river without accumulation of high amount of water in water reservoirs, and elimination of domino effect in damage of one or several dams of the HPP cascade.

1 dwg

FIELD: power industry.

SUBSTANCE: hydro-electric pontoon power plant includes anchored floating shell and vane wheels 6 linked to electric generators. Shell is made in the form of two parallel pontoons 7 attached rigidly to each other with wheels 6 mounted between them. Each pontoon 7 has parallelogram cross-section in longitudinal direction. Gap between pontoons 7 is limited in the front and rear ends by shields 10 and 2 connected rigidly to pontoons 7. At the top, pontoons 7 are rigidly connected by two cross-ties 9 and 3 I the form of stripes adjoining shields 10 and 2. Rectangular gap is formed between stripes 9 and 3 and pontoons 7. Equal angles 5 are positioned vertically in each corner of that rectangle, with their bottom ends connected rigidly to side surfaces of pontoons 7. Top ends protrude above pontoons 7. Cap 4 is mounted above wheels 6.

EFFECT: possible application of plant both in summer and in winter.

2 cl, 2 dwg

Aero hpp // 2500854

FIELD: power engineering.

SUBSTANCE: device comprises a lower reach 1, an upper reach 2, a water conduit 3, a turbogenerator 4 and surfaces 5. Surfaces 5 are made as capable of receiving atmospheric moisture from the air flow and delivering it to the upper reach. Besides, surfaces 5 are raised to the height above the dew point for these atmospheric conditions. To support the surfaces 5, balloons or airships 6 are used.

EFFECT: expansion of functional capabilities and increased specific capacity of HPP by using maximum possible difference of heights between upper and lower reaches from height of actual condensation of atmospheric moisture in a cloud to ground level.

2 dwg

FIELD: transport.

SUBSTANCE: invention relates to water transport and is intended for cargo loading and unloading on/from vessels. Method for heavy-weights loading-unloading on/from vessels (2) includes wharf device (7) with access ramp (8), execution of bottom sand bed in dock chamber (3) with pump station equipped with gate (4), installation of ramp between wharf and vessel for loading-unloading heavy-weights by highway freighter. To execute loading-unloading a vessel is led into dock chamber, dock gate is closed, water is pumped out of chamber until vessel is sitting on bed. The access ramp is made with side walls top edges of which coincide with top of dock chamber walls.

EFFECT: higher reliability of loading-unloading in conditions of variable water levels in water body.

2 cl, 6 dwg

FIELD: transport.

SUBSTANCE: invention relates to water transport, particularly, to protection of lock gate against docking impact. Proposed device consists of flexible element (6), hose (3) and shock absorbers mounted at lock chamber walls. Flexible element (6) is thrown over the lock chamber navigable span and secured at ends of bars (3) articulated with lifting bars. Lifting bars are arranged at trolleys equipped with lat lift-and-lower cable system. Element (6) lowered in lock chamber, lifting bars rest on trolleys (2). Shock absorbers are arranged at trolley (2) ends. Trolley (2) top tier is stepped. Total height of steps complies with water level variation amplitude in lock chamber. Height of every step corresponds to step of rearrangement of said element (6).

EFFECT: higher safety.

3 dwg

FIELD: construction.

SUBSTANCE: safety device of sluice gates is designed for protection of sluice gates against impact of vessels. The safety device comprises a flexible barrier with shock absorbers, two beams that rotate in the horizontal plane and a truss with drives. Two rotary beams are hingedly fixed on opposite sides of the sluice. The rotary truss is installed on one of the rotary beams. The flexible barrier comprises two ropes. Some ends of ropes are connected to shock absorbers. On free ends of ropes there are elements of a coupling unit. Each rope is equipped with stops. Stops, interacting with ends of rotary beams, provide during assembly the necessary tension of ropes. During installation of a barrier device, rotary beams and truss turn by drives perpendicularly to the sluice in one line. Free ends of two ropes are coupled with a coupling unit. The rotary truss turns with a drive relative to the rotary beam to the side opposite to the impact of the vessel, leaving the rope freely sagging only between rotary beams. Reduced capacity of drives and mass of metal structures is achieved by installation of beams and truss, which are rotary in the horizontal plane.

EFFECT: reduced force of rope tension is achieved by reduction of length of a rope freely sagging between rotary beams.

6 dwg

FIELD: construction.

SUBSTANCE: system of shock absorbers is arranged in the form of rubber blocks installed on lock walls. Rubber blocks of shock absorbers are installed in niches arranged on horizontal sites of lock chamber walls. Rotary beams, one end of which rests on a hinged joint near end wall of a niche, are installed in the same niches. The second end of the beam rests on rail tracks via wheel supports and is connected to the end of a barrier element. Rubber blocks are fixed with one end to a vertical wall of a niche, and with the other they rest against a vertical face of a rotary beam.

EFFECT: increased reliability of a system of shock absorbers.

3 cl, 6 dwg

FIELD: water engineering.

SUBSTANCE: invention refers to method and system of electric power generation when water levels in navigation locks change. Navigation lock uses hydraulic turbine and/or pump turbine for maintaining approximately constant value of flow velocities during water drainage through navigation lock within major portion of water transfer cycle, which leads to loss reduction of full head strength, and for recuperating unused hydraulic energy to be generated as electricity. Difference between water levels on the opposite sides of navigation lock forms the potential hydraulic energy. By controlling water drainage, full head energy losses are sufficiently reduced within this period, thus providing possibility of optimising hydraulic energy recuperation.

EFFECT: optimising hydraulic energy recuperation.

16 cl, 2 dwg

Hydropower plant // 2102559
The invention relates to low energy and concerns of the project small hydro power plants under construction in various rivers and reservoirs

FIELD: water engineering.

SUBSTANCE: invention refers to method and system of electric power generation when water levels in navigation locks change. Navigation lock uses hydraulic turbine and/or pump turbine for maintaining approximately constant value of flow velocities during water drainage through navigation lock within major portion of water transfer cycle, which leads to loss reduction of full head strength, and for recuperating unused hydraulic energy to be generated as electricity. Difference between water levels on the opposite sides of navigation lock forms the potential hydraulic energy. By controlling water drainage, full head energy losses are sufficiently reduced within this period, thus providing possibility of optimising hydraulic energy recuperation.

EFFECT: optimising hydraulic energy recuperation.

16 cl, 2 dwg

FIELD: construction.

SUBSTANCE: system of shock absorbers is arranged in the form of rubber blocks installed on lock walls. Rubber blocks of shock absorbers are installed in niches arranged on horizontal sites of lock chamber walls. Rotary beams, one end of which rests on a hinged joint near end wall of a niche, are installed in the same niches. The second end of the beam rests on rail tracks via wheel supports and is connected to the end of a barrier element. Rubber blocks are fixed with one end to a vertical wall of a niche, and with the other they rest against a vertical face of a rotary beam.

EFFECT: increased reliability of a system of shock absorbers.

3 cl, 6 dwg

FIELD: construction.

SUBSTANCE: safety device of sluice gates is designed for protection of sluice gates against impact of vessels. The safety device comprises a flexible barrier with shock absorbers, two beams that rotate in the horizontal plane and a truss with drives. Two rotary beams are hingedly fixed on opposite sides of the sluice. The rotary truss is installed on one of the rotary beams. The flexible barrier comprises two ropes. Some ends of ropes are connected to shock absorbers. On free ends of ropes there are elements of a coupling unit. Each rope is equipped with stops. Stops, interacting with ends of rotary beams, provide during assembly the necessary tension of ropes. During installation of a barrier device, rotary beams and truss turn by drives perpendicularly to the sluice in one line. Free ends of two ropes are coupled with a coupling unit. The rotary truss turns with a drive relative to the rotary beam to the side opposite to the impact of the vessel, leaving the rope freely sagging only between rotary beams. Reduced capacity of drives and mass of metal structures is achieved by installation of beams and truss, which are rotary in the horizontal plane.

EFFECT: reduced force of rope tension is achieved by reduction of length of a rope freely sagging between rotary beams.

6 dwg

FIELD: transport.

SUBSTANCE: invention relates to water transport, particularly, to protection of lock gate against docking impact. Proposed device consists of flexible element (6), hose (3) and shock absorbers mounted at lock chamber walls. Flexible element (6) is thrown over the lock chamber navigable span and secured at ends of bars (3) articulated with lifting bars. Lifting bars are arranged at trolleys equipped with lat lift-and-lower cable system. Element (6) lowered in lock chamber, lifting bars rest on trolleys (2). Shock absorbers are arranged at trolley (2) ends. Trolley (2) top tier is stepped. Total height of steps complies with water level variation amplitude in lock chamber. Height of every step corresponds to step of rearrangement of said element (6).

EFFECT: higher safety.

3 dwg

Up!