RU2582882C1 - Device for controlling flow rate in closed water conduit - Google Patents

Abstract

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to hydraulic engineering and land reclamation and may be used for automatic water flow to consumer, as well as in self-pressurising systems with intermediate tanks. Device comprises tank 4, supply pressure pipeline 1 at end divided into two lines of pipes 2 and 3. Each line of pipes 2 and 3 is connected with tank 4 with partitions 5 and 6, dividing vessel 4 into two tight chambers 7 and 8 and one common chamber made up of tank 9. Partition wall 6 has outlet holes 10 and 11, gates 12 and 13. Pipes 2 and 3 with intake holes 18 and 19 are connected with pressure chambers 16 and 17, at bottom of which there are holes 18 and 19 with valves 20 and 21, which connected by hinged-lever mechanism made up of levers 22, 23, 24, 25, respectively with rods 28 and 29 with floats 26 and 27. Floats 26 and 27 are placed in vessel 9 separated from each other by closed partitions 32 and 33, in middle part of which there are outlet holes 34 and 35 at bottom of tank 9.

EFFECT: design of device is aimed at efficiency, simplification and reduction of metal consumption.

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Description

The invention relates to hydraulic engineering and land reclamation and can be used for automatic flow of water to the consumer, as well as in self-pressure systems with intermediate tanks.

A device for regulating the flow rate of pressure pipelines, including a reservoir, a pressure piping, on which a shut-off element with guides is installed, a kinematic device connected to an actuator of the control chamber, a float level sensor with a rod connected to a switching unit connected to the locking body, the switching unit made in the form of a hydraulic switch having a drain channel connected to a pressure pipe and connected to the upper cavity of the control chamber while the float sensor with the switch is isolated by a partition in which an opening is made, located at a level below the minimum liquid level (patent RU No. 20155526, G05D 7/01 from 06/30/1989).

A disadvantage of the known device is that it has an actuator such as a piston hydraulic actuator, which is limited in operation only at a pressure of more than 0.2 MPa. It contains moving friction parts - a piston, a rod with oil seals that require periodic lubrication. Moreover, the reliability of the device requires the need for accurate mutual alignment of the piston in the housing and other structural elements and, as a result, a large material consumption.

Known automatic regulator of static water pressure for closed pipelines, containing a reservoir supplying a pressure pipe, which has a shut-off body with guides, kinematically connected with the Executive body of the control chamber, a float level sensor with a rod connected to a switching unit connected to the shut-off body, and the switching unit is made in the form of a hydraulic switch having a drain channel connected to a pressure pipe and connected to the upper cavity an avalanche chamber, the float sensor with a switch insulated with a partition in which a hole is made, located at a level below the minimum liquid level, it contains a vertically placed telescopic distributor suspended from the abutments with the possibility of a fixed movement of a relative channel inlet having through symmetrical openings, one of which is connected to the atmosphere, and the other is hydraulically connected to the upper cavity of the executive body, made in the form of a control membrane chamber and with a pressure pipe equipped with valves, and in the initial position, the shoulder of the two shoulders lever, on which the float level sensor is fixed, is limited from vertical movement by the support below the limit level in the flow tank and by a horizontal visor installed above the opening of the partition placed at a level lower the minimum liquid level (patent RU No. 2475705, G01F 1/00 of 02.20.2013).

The disadvantage of this device is the presence of numerous elements of the device and, as a result, a large material consumption. In addition, it is limited by the costs of distribution pipelines in systems with intermediate tanks (pools) with pressure-discharge chambers, i.e. it becomes cumbersome if large volumes of water flow into the well, and the operation of one actuator with a switching unit with a float sensor does not lead to a change in the sequence of water supply in the case of sectional chambers, since communication lines are complicated structurally, and this will need to be linked to time opening and closing of each locking body after filling the containers. Thus, in order to increase the flow rate of each chamber to a predetermined one, it is necessary to use a complication of the design and, as a result, a large material consumption.

Consequently, new structures should be created taking into account the characteristics of self-pressure systems with intermediate tanks (pools), i.e. as unloading tanks with automatic regulation of the downstream on a large length water conduit, for example, several kilometers long with a large diameter inlet pressure pipe. Along the way of such water conduits, several unloaded reservoirs (pools) can be installed, which are designed to reduce the pressure in it and to automatically control the water supply in accordance with the requests of consumers along the route of the self-pressure pipeline.

The technical result from the use of the claimed invention is to increase work efficiency, simplify the design and reduce material consumption.

The technical result is achieved in that a device for controlling flow in a closed conduit containing a reservoir leading a pressure pipe, on which a shut-off element with guides is installed, a kinematic device connected with an actuator of the control chamber, a float level sensor with a rod, and the float sensor is isolated by a partition in which a hole is made, the tank is made in the form of two sealed chambers with two inlet openings and two outlet openings, each inlet opening with The pressure chamber is blocked by a valve that is connected to the float by a pivot-lever actuator located in a water-filled container, the latter is divided into two identical float chambers symmetrically to each other, enclosed by closed partitions, and an outlet in the middle is made in the side wall of each corresponding float chamber parts located at the bottom of the water-filled tank, with each hermetic chamber connected to the corresponding pressure pipe, dividing the supply th pressure pipe into two pipe lines.

In addition, each sealed chamber is equipped with an operational shutter.

In addition, the outlet of the water-filled tank is equipped with an adjustable shutter.

Therefore, it can be noted that the discharge tank automatically limits the pressure in the inlet distribution pipe to the permissible value and regulates the transit flow rate of the water conduit along the highway in self-pressure systems. The creation and sharing of high costs in the inlet pipeline boils down to the fact that when large amounts of water come in, it is necessary to stabilize its level in a short section of the pressure system and relieve its level in the discharge tank closest to the consumer. In the proposed invention, water is supplied until equilibrium is reached - the inflow becomes equal to the selection. Thus, the command from the consumer is transmitted from bottom to top along the water conduit from one tank to the next, until the flow from the source of water supply increases accordingly. Moreover, in the proposed device in each case, the tank capacity is taken from the operating conditions adopted by the system for regulating the water supply and the length of the water pipe section.

It is rational in the practice of such water conduits in the presence of intermediate withdrawals along the water conduit to seek to combine the sampling points with the location of discharge tanks, which serve as sources of intermediate water intake.

Based on the foregoing, the author considers it possible to argue that the proposed technical solution meets the criterion of "significant differences".

In FIG. 1 shows a device for controlling flow in a closed conduit, in plan; in FIG. 2 is a section AA in FIG. one.

A device for controlling the flow in a closed water conduit contains an inlet pressure pipe 1, which is finally divided into two pipe lines 2 and 3. Each pipe line 2 and 3 is connected to the tank 4 with partitions 5 and 6, dividing the tank 4 into two sealed chambers 7 and 8 and one common chamber, made in the form of a tank 9. Each hermetic chamber 7 and 8 is equipped with an automatic device that controls the flow depending on consumer demand. The partition 6 has outlet openings 10 and 11, valves 12 and 13, which serve to inspect and repair the corresponding sealed chamber 7 or 8 and other elements installed in them. A pressure chamber 16 and 17 is attached to each pipeline 2 and 3 with inlet openings 14 and 15, at the bottom of which there are openings 18 and 19. To control the area of the openings 18 and 19, valves 20 and 21 are used, each of which with levers 22 and 23 as well as levers 24 and 25 are connected to the floats 26 and 27 through rods 28 and 29. Each lever 24 and 25 is attached to the axes 30 and 31. Each float 26 and 27 is placed in a common tank 9, and they are limited by closed partitions 32 and 33 in the middle part, at the bottom of the tank 9 of which there are outlet openings 34 and 35. At the outlet 36 of the tank 9 is installed The control valve 37 is charged if the filling speed in the tank exceeds the permissible upper limit (for example, an accident at the water conduit).

A device for controlling flow in a closed conduit operates as follows.

When the water flow increases, its level in the discharge tank 4 begins to rise, this causes each individual floats 26 and 27 to rise. Each float 26 and 27 is connected with rods 28 and 29, as well as with levers 22, 23, 24 and 25, rotation which through the axes 30 and 31 are transmitted to the device of valves 20 and 21, located below in the pressure chambers 16 and 17, opening and closing the holes 18 and 19 with valves 20 and 21. The pressure chambers 16 and 17 are connected to the inlet openings at the ends of the pipes 2 and 3, through which water is supplied through pressure chambers 16 and 17 further to sealed containers measures 7 and 8. In the case of lowering the floats 26 and 27, therefore, the valves 20 and 21 are opened. Thus, the area of the holes 18 and 19 increases and the passing water flow through it increases. Increasing the flow rate in the tank 4, respectively, in the tank 9, causes a reverse process, that is, raising the floats 26 and 27 up and decreasing the area of the holes 18 and 19 leads to a decrease in water demand in the downstream sections of the water conduit depending on the intake of the consumer. Therefore, when lowering the floats, the degree of opening of valves 20 and 21 increases, and water enters the tank 4 until equilibrium is reached - the inflow will become equal to the selection. Thus, the command from the consumer is transmitted from bottom to top along the water conduit from one tank to the next, until the supply from the water supply increases accordingly.

The partition 6 with the outlet openings 10 and 11 at the initial stage creates a certain quenching of the water coming from the pipes 2 and 3, and the outlet opening 36 with the shutter 37 of the tank 9 creates the required volume of water to completely quench the energy (pressure) of the jets flowing from the outlet openings 34 and 35, which affects the control mechanism of the float actuator with floats 26 and 27. In this case, water from the closed partitions 32 and 33, respectively, through the bottom outlet openings 34 and 35 completely fills the tank 9, adjustable by the shutter 37.

The gates 12 and 13 at the outlet openings in the partition 6 are mainly used to inspect or repair the corresponding chamber 7 or 8. At the outlet 36 of the vessel 9, it is possible to automatically stop the flow of water from the tank 4 by closing the shutter 37.

Thus, the operation of the device, the increase or decrease in water demand in any part of the conduit due to hydraulic feedback is automatically transferred to the higher sections of the conduit, taking into account the high-pressure head in the conduit.

An emergency discharge can be provided in the tank (not shown in the drawing), which is located at the highest permissible level, and acts in case of a malfunction of the automatic equipment. For emptying the individual sealed chambers 7 and 8, water outlets into the common pipe 38 of the outlets 39 are used, equipped with valves (not shown).

In the proposed device, the total tank capacity is taken depending on the operating conditions, the adopted water supply control system and the lengths of the water pipe sections, in addition, in irrigation systems, the selection along the water pipe must be combined with the location of the discharge tanks, which serve as sources of intermediate water intake.

Thus, the proposed device allows to simplify the design by eliminating the distribution mechanisms of the hydraulic connection of each pipe, to ensure operational efficiency and reduce material consumption.

Claims (3)

1. A device for controlling flow in a closed water conduit, comprising a reservoir supplying a pressure pipe, on which a shut-off element with guides is installed, a kinematic device connected to the actuating element of the control chamber, a float level sensor with a rod, the float sensor is isolated by a partition in which an opening is made, characterized by the fact that the tank is made in the form of two sealed chambers with two inlet openings and two outlet openings, each inlet opening being provided with a pressure head a measure covered by a valve that is connected to the float by a pivot-lever actuator located in a water-filled tank, the latter is divided into two identical float chambers symmetrically to each other, enclosed by partitions, and an outlet in the middle part located in the side wall of each corresponding float chamber at the bottom of the water-filled tank, while the sealed chamber is connected to the corresponding pressure pipes, dividing the supply pressure pipe into two lines pipes. 2. The device according to p. 1, characterized in that each sealed chamber is equipped with an operational shutter. 3. The device according to p. 1, characterized in that the outlet of the water-filled tank is equipped with an adjustable shutter.

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