Ground water level controller

FIELD: construction.

SUBSTANCE: controller comprises a well 7, a stop element in the form of a valve 4 installed in it on the head of the drain, and the valve is connected with levers of a hinged mechanism, and a float 8. The lever mechanism is made as capable of free contact with the floating float 8. The float is installed in an additional chamber 6. The lever mechanism is installed on the horizontal axis 12. Besides, the axis of the lever mechanism divides it into two unequal parts 14 and 15, the top one of which is more than the bottom one. On the top part of the arm 14 there is a counterbalance reservoir 17 hingedly fixed, the centre of gravity of which is placed above the horizontal axis of rotation. On the bottom part of the arm 15 there is a mechanism hingedly fixed to change position accordingly above the float at elevations of maximum and minimum water level in the float chamber.

EFFECT: increased reliability of a device, higher accuracy of control and possibility to adjust system operation into a drying mode.

5 cl, 3 dwg

 

The invention relates to the reclamation, in particular for hydraulic structures on drainage, watering systems, and is intended for automatic control of water level in open and closed networks.

A device for humidity control, including a well and a complex armature of the regulation, which provides for changing the operation mode of drainage when changing the water level in the channel (USSR Author's certificate No. 794112, CL E02B 11/00, 1981).

However, the device has a low accuracy level stabilization, require special watering channel and major drainage systems and is characterized by structural complexity, and this entails a reduction of reliability.

The closest in technical essence to the present invention is a regulator of the groundwater level, containing a well, installed it on the head drain shut-off body in the form of a Poppet valve associated with the levers articulated mechanism and the float is placed in the well. Such a device allows to stabilize the water levels in the well and open the drain manifold, regardless of the level with increasing groundwater (USSR Author's certificate No. 763519, CL E02B 13/00, 1978).

However, this device requires a supply of water to the drainage reservoir from the source to the mouth and is characterized by Neva who Oka accuracy level stabilization. In addition, the device is difficult to manufacture, during operation due to silting and sogrevaniya gauge tubular filter is not provided with sufficient accuracy to maintain specified pressures; the complexity of the adjustment knob to another level of groundwater. Another disadvantage is that when simultaneously raising in excess of specified levels of ground water in the upper and lower pools, for example, from rain, floats acting on the actuator of the locking member in two mutually opposite directions, which entails randomness in the choice of its provisions. The inability of the regulator in full drainage.

The purpose of the invention is to enhance reliability of the device and improving the accuracy of regulation and restructuring in the dry mode.

This goal is achieved by the fact that the lever mechanism is made with the possibility of free contact with the floating float placed in the secondary camera, and levers mounted on a horizontal axis, and the axis of the lever to divide it into two unequal parts, horse of which are more grassroots, and horse of the shoulder pinned capacity and balance, center of gravity, which is placed above the horizontal axis of rotation, and at the grassroots of the shoulder hinged mechanism changes the position of the corresponding is but on the float at the maximum and minimum water level in the float chamber.

In addition, the lever mechanism is in the form of two interconnected parts bolt located at an obtuse angle, attached to the convex side of the horizontal axis.

The mechanism for changing the position in contact with the float is made in the form of a helical articulated pusher with a horizontal plate fixed to the downstream end of the shoulder, and the controller is equipped with a lift, interacting with screw hinge follower.

The controller is equipped with a free float is placed on the supports in the chamber, the bottom of which has a slope towards the trash device made in the form of removable vertical grid in the lower part at the bottom of the camera with proryvnym window and has a longitudinal slot with decreasing in the direction of the height of the camera width.

Application level control of groundwater the proposed design allows you to maintain groundwater levels, and also provides a flexible and differentiated regulation specified levels on the commanded area depending on the types of crops and vegetation period, which increases C. agricultural crops regardless of weather conditions. In addition, the proposed device is lower compared to the prototype material. The effectiveness of the proposed controller also ODA is determined by the ability to automatically control the rate of drainage in the humidification-dehumidification, and if you need to rebuild the system in the dry mode, which eliminates the need for creating a sealed well. In addition, wave flow from the well into the chamber, calm down due to the presence of narrowing the slits in the grating, resulting in the float moves along the height of the camera in still filling the chamber with water. The settled suspended sediment on the bottom of the camera is easily dissolved by water and washed off the reverse flow of water when the lowering of the water level in the reservoir. The destruction of the settled sediment is produced by reducing the water level in the discharge manifold below the minimum estimated mark - water from the well, the manipulation of which produces a mechanism provisions on free-floating float. All this is characterized by high reliability of the movement of the floating float in the chamber.

Perform design protective grille allows you to automate the process of protecting the camera from the dam suspended (fine) sediment and small debris. The process of protection is differentially: the destruction of pronounced dam - at the command of the reduction in water level in the reservoir or when closing pipe-elbows valve by manipulation of the control mechanism configured to support the maximum design elevation of the water level (conque the well from the water), that is, its drain.

Figure 1 shows the regulator groundwater, top view; figure 2 is a section a-a in figure 1; figure 3 - scan grid.

The level control consists of a welded housing 1 with a flange, connected to Drenai 2 and is made in the form of a pipe-elbows 3 at 90°. Vertical pipe end valve is also blocked by the shut-off body in the form of a valve 4, is rigidly fixed to the two hinge lever bolt 5, which is located in a high-rise ratio above the float chamber 6, is placed within the well 7. In the float chamber 6 is sensitive element in the form of floating (free) float 8. Removable grating 9 has a longitudinal slot with decreasing in the direction of the height of the camera width and mounted in the guide transversely of the chamber 6 to the bottom 10. The bottom of the chamber 6 provided with a bias towards the inlet pipe-elbows 3 and has lugs 10, which drops float float 8. A lever mechanism is mounted on a horizontal axis 12, and the axis 12 of the lever to divide it into two unequal parts 14 and 15 and the axis 12 is fixed to the lugs 13. A lever mechanism is in the form of two rigidly interconnected parts of the bolt 14 and 15, arranged at an obtuse angle, attached to the convex side to a horizontal axis 12. The axis 12 is displaced relative to the mounting bolt 5 to the valve 4 in the direction of the float chamber 6. On the horse part II is ECA 14 fixed swivel camera counterweight 17, the center of gravity which is located above the horizontal axis 12 of rotation. At the grassroots of the shoulder 15 hinged screw plunger 18 with a horizontal plate 19 in contact with the floating float 8 in the chamber 5. To change the job, screw pusher 18 can move along the screw relative to the grassroots of the shoulder 15 by a specified amount, with the screw plunger 18 with the flange 20 is fixed inside the latch 21 with the lift 22.

In General, the regulator is a hard dvuhzonovy hinge mechanism is rigidly attached to the supports 13. Camera-the counterweight 17 is placed in the well 23 with drain pipe 24 at the bottom of the well. This removable grating 9, made with decreasing width toward its top end, is placed in the guide and made in the lower part at the bottom of the camera proryvnym 28, with lifting handle 29, and drena 24 is connected to the collector 25.

The controller operates as follows.

When water enters the collector controller is in position when the casing pipe-elbows 3 preloaded valve 4 and the float 8 is freely placed on the lugs 11 of the chamber 6. The water in the well no. The incoming water enters the collector 25 and there is an increase in water pressure on the valve 4. As a result, the valve 4 under the action of the buoyancy of the water rises up to a value that allows you to skip the required supplies is on the water in the well 7. When levels in drena smaller Hpvalve 4 under the action of the weight capacity of the counterweight 17 with a stabilizer (e.g., fill - gravel, cobble or other heavy improvised material) is closed, since the torque from the force of the hydrostatic water pressure G·l1>P·l (where G is the weight capacity of the counterweight; P - force hydrostatic water pressure; l1and l - respectively, the distance horizontally and vertically to the axis of rotation). The amount of ballast for capacity-counterweight 17 is selected such that when the water level in the ditch Hpthe force of the hydrostatic water pressure on the pressure valve 4 Particlewas sufficient to automatic valve 4 is moved and opened up from the top of the water drains 2 into the well 7. The upper part of the valve 4 with the bolt 5 is rigidly connected with a lever mechanism supported on the axle 12 with the convex side (friction force can be neglected because of their smallness) rises due to the action of dvuhtomnogo mechanism, consisting of interconnected at an obtuse angle turning of the shoulders 14 and 15. Simultaneously with the rotation of the lever, turning around the axis 12, rises the capacity of the counterweight 17. By increasing the level in the float chamber 6 8 floats upwards, releasing the lugs 11, and comes in contact with the plate 19 and acts on the plunger 18, the pinned hinge is on at the grassroots of the shoulder 15. The filling with water of the well 7 and the camera 6, and the contact plate 19 of the plunger 18 continues until the pressure in the chamber 6 are balanced for maximum this discharge water level in the outlet manifold 25. At the termination of reset and rise of water level in the reservoir 25 and, consequently, increasing the hydrostatic pressure in the chamber 6 of the valve 4 is closed and the well 7 remains filled with water. Wave flow from the well 7 through narrowed slits removable grating 9 is supplied into the chamber 6, calms down, because this is a peaceful movement of the float 8 freely on the height of the camera 6. If the lower part (base) of the grating 9 the flushing box 28 sediment suspended sediment on the bottom 10 of the chamber 6 are washed away by the flow of water during the lowering of the water level in the reservoir 25. During the washing chamber 6 from the settled sediment due to lowering of the water level in it, perhaps to explore the bars 9 and, if the fin is partially delayed on the grid 9, then it is lifted (for example, a hook or other known devices) handle 29, is cleaned from the remnants of the fin.

The reduction of the total area of holes in the lattice 9 allows exceptions ripple on the surface of the water in the chamber 6 without special dampers, which is characterized by high reliability free movement of the float in the chamber 6.

When full the m emptying of the chamber 6 and pit 7, the water gradually flows from the drain 24 in the manifold 25. When the float 8 falls freely on the supports 11. The inclined bottom 10 of the chamber 6 is connected with proryvnym hole 28 with a removable grate 9, allows washing of sediment into the well 7 and the drain 24. The fin also breaks away from the proposed construction of the lattice, as washing will depend on the speed of flow of water at a lower level in the well 7 and the speed of movement of water in the drain 24. Articulated lever mechanism (actuator) with capacity-counterweight 17 shoulder 14 rises, the valve 4 opens the pipe elbow 3. Water from the inlet drains 2 under pressure rushes into the well 7 and fills again the camera 6. The pressure in the drain outlet 24 is maintained at a specified value, caused by the filling of the reservoir 25.

Thus, in the inter-irrigation period is automatically maintained constant pressure in the outlet ditch determined based on the amount of water loss of soil at the time of release estimated, for example, arable layer of this drainage system that keeps the pipe from impact and from destruction. Moreover, the hydraulic regime in the drain outlet 24 is characterized by a smooth, gradually fading the change in the flow rate until the complete evacuation of the cavity drains and sediment.

At lower water levels in the upper ditch 2 to a given Hpthe resultant force is Alenia water P articledecreases and the moment of this force becomes smaller moments of the weight capacity of the counterweight 17. Valve 4 begins to close. The upper part of the shoulder 14 of the lever based on the axis 12 of rotation is lowered, and the lower part of the shoulder 15 is moved upward with the plunger 18, the float 8 is lowered to the lugs 11. When closing the valve 4, the ratio of the moments will be G·l1>R·l.

The value of the obtuse angles must settle during design development.

The magnitude of the resultant is determined by the formula

P=(γHp2g),

where Hp- estimated working head, m;

γ is the volumetric weight of water, t/m3;

g=9,81 m/s2.

Finally the weight capacity of counterbalance is specified by filling ballast 17 when designing a controller (fill - gravel, cobble or other heavy improvised material).

Thus, the combination of floating of the float 8, the pusher 18 plate 19 associated with the two shoulders of the hinge mechanism and the valve 4, is placed in the General well 7, is supported by the pressure in the automatic mode, even after emptying capacity of the well 7 and the camera 6, the reclamation system g is ready for a new cycle of operation.

For this control in dry mode, you need the latch 21 lift 22 to press down fully on the flange 20 of the plunger 18, thereby the valve 4 will open the pipe elbow 3.

In addition, in complete emptying of the well 7 and the camera 6, which contributes to the erosion and transport of suspended sediment from the cavity structures and drains must retainer 21 lift 22 to engage the flange 20 and fully raise the plunger 18, thereby the valve 4 will close the pipe elbow 3.

To supply a given flow rate Q, the valve 4 is set to opena. Due to the lever-hinge mechanism and the interaction of a screw plunger 18 with the float 8, actual consumption, expiration equal to

Q=μKaboutl.ωKaboutl.2gZ,

where ωNr.- the cross-sectional area of the knee, m2;

µNr.- consumption ratio tribe is (0,3...0,4);

Z - the difference between the hydraulic pressure in the output section of the knee and the level of the downstream manifold, m;

g=9,81 m/s2.

This means that the regulator may have the optimum ratio of the geometric dimensions. Given that the float chamber 6 made for p is edely pulsating area and are equipped with soothing removable grating 9, with the reduction of the total area of the holes of the grating 9 and proryvnym 28, grill, which is located in the guides, as well as the lack of influence of the pulsation of the water level from the opening of the orifice tubes-knee 3 valve 4, is created the stability of floating of the float 8. Flooding of the outlet above the valve, it is advisable to take is equal to (1,0...1,5)DNr.(where DNr.the diameter of the knee), the height limit valve opening (0.5 to 0.8)DNr.Given that the opening of valve 4 also depends on the unit level screw plunger 18 with the mechanism in position with the lift and installs any mode flow from drains, connecting the opening and the flow rate, it is advisable to maintain these parameters. The pipe-elbow 3 in such diameters is responsible for regulating the flow of water in the well when the change in the flow rate (level) in the manifold 25.

The calculation of the float determines the volume of the float and the length of the lower arm when the contact to the axis of the lever. Based on the fact that both of the shoulders 14 and 15 of the lever is different and fixed with the convex side towards the axis 12 in the direction from the valve 4, the floating float 8 works steadily with less vertical load. The controller design is simple and compact. Installation guide removable grids with narrowing the slits in the side with decreasing its top end width and prom the main window, characterized by high reliability free movement of the float in the chamber. The camera, with the slope of the bottom in the direction of the flushing box in the grid will increase its floating float.

This version of the controller, according to the authors, was previously unknown and meets the criterion of "Significant differences".

Thus, compared with the prototype controller allows you to regulate the water level in the ditch in the automatic mode with high accuracy and high performance. Has a simple system of nodes and decreased sensitivity to suspended sediment due to the fact that water flows under pressure from the well even when closing the valve on the pipe - elbows not received when it is closed. Therefore, the proposed controller is robust with variations above the minimum specified level of water in the upper ditch.

The effectiveness of the proposed controller is that it provides the opportunity to control the process of wetting and drying; washing the float chamber and cavity drains, as well as the need to rebuild the system in the dry mode, which eliminates the need for creating a sealed well, which is larger and cost several times more expensive than the device itself. The proposed controller has a simple connected with the battle part of the bolt, located at an obtuse angle, attached to the convex side of the horizontal axis, and reduces the amount of control effort when working design.

1. The regulator of the groundwater level, containing a well, installed it on the head drain shut-off body in the form of a valve associated with the levers articulated mechanism and the float, characterized in that, in order to increase reliability, simplify the device and improve the control accuracy, the lever mechanism is made with the possibility of free contact with the floating float placed in the secondary camera, and levers mounted on a horizontal axis, and the axis of the lever divides it into two unequal parts, horse of which are more grassroots, and horse of the shoulder pinned capacity and balance, center of gravity, which placed above the horizontal axis of rotation, and at the grassroots of the shoulder hinged mechanism changes position, respectively, above the float at the maximum and minimum water level in the float chamber.

2. The regulator according to claim 1, characterized in that the lever mechanism is in the form of two rigidly interconnected parts bolt located at an obtuse angle, attached to the convex side of the horizontal axis.

3. The regulator according to claim 1, characterized in that the mechanism of the change of the position in contact with the float is made in the form of a helical articulated pusher with a horizontal plate, attached to the downstream end of the shoulder.

4. The regulator according to claim 1, characterized in that, with a view to restructuring in the dry mode, the controller is equipped with a lift, interacting with screw hinge follower.

5. The regulator according to claim 1, characterized in that the free float is placed on the supports in the chamber, the bottom of which has a slope towards the trash device made in the form of removable vertical grid in the lower part at the bottom of the camera with proryvnym window and has a longitudinal slot with decreasing in the direction of the height of the camera width.



 

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