NL1009111C2 - Weir or dam is provided with valve with low-lying axis and moved by two-sided hydraulic cylinders with extended piston rods - Google Patents

Abstract

The weir or dam is provided with a valve with low-lying axis. The valve is moved by two-sided hydraulic cylinders (7) with extended piston rods (8). The piston rods on the one hand are rotatably fitted on a surrounding structure at rotary points (0) and on the other hand are mounted rotatably on the valve at rotary points (10). The rotary points (10) are located at a point eccentric in respect of the vertical centre line of the weir or dam valve axis and at some distance from that axis. The cylinders are adjusted by a pump (12) via a four-way valve (14) with closed centre position (II). Both cylinders are connected in parallel with conduits (18,19) positioned along the bottom of the weir or dam.

Description

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Weir with laaaliqaende shaft.

The invention relates to a weir with a weir valve which has a low-lying shaft. For the sealing, thrust valve 05 is provided with semi-circular cheeks.

Known barrages of this type are mechanically adjusted on both sides, for example with a rack. To achieve this adjustment, an axis is arranged above the water level, which adjusts the thrust valve via right-angle transmissions. Such a device is mechanically inefficient. Adjusting is hard work. In some cases it makes sense that small vessels can pass the fully opened weir. It is also undesirable that unauthorized persons can cross the waterway.

The hydraulic drive according to the invention makes it possible to run the pipes at the bottom, so that no connection above the water level is necessary and passage is possible. The hydraulic drive has been found to be very efficient and easy to operate. In case an electric pump is used, remote control is possible.

For this purpose the damper is moved with two hydraulic cylinders which are rotatably mounted on the frame on the one hand and on the damper on the other hand at a point located eccentrically with respect to the vertical axis of the damper shaft. The piston rod has been extended for this purpose so that the top pivot point is approximately at the level of the highest water level. This makes it easy to reach the cylinder for inspection.

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The invention will be discussed with reference to the drawing. Fig. 1 shows a cross section across the weir.

Fig. 2 shows a view with partially removed casing.

FIG. 3 shows the hydraulic scheme.

In FIG. 1, the damper is indicated by (1). Thrust valve (l) pivots about shaft (2). Semi-circular 1009111 '-2-shaped cheeks (3) are fitted to the weir valve. Cheeks (3) seal against the casing (4) as well as the semicircular part around shaft (2). Weir valve (1) is reinforced with profiles (5). On one of the uprights of conversion (4) is a cabinet (6) in which the 05 hydraulic installation is placed. Between casing (4) and cheeks (3), cylinders (7) with extended piston rods (8) are connected to pivot point (9) and pivot point (10). Hinge point (9) is attached to casing (4) and hinge point (10) is attached to weir valve (1) at some distance from 10 axis (2). Because the damper (1) in the position for the highest water level is turned about 15 degrees relative to the vertical, cylinder (7) with extended piston rod (8) will exert an adjusting torque on damper (1).

In FIG. 3, buffer vessel (11) is filled with hydraulic oil which is connected to pump (12). Pump (12) is connected via line (13) to four-way valve (14). Four-way valve (14) has 3 positions:

Position I directs the oil from pump (12) to line (18) 20 with which the piston rod is pulled in. Oil flows back via line (19) via lines (20) to pump (12) or buffer tank (11). The damper (1) is set at a higher level (21).

Position II is the middle position of the four-way valve (14). In this position all channels are closed so that no oil can pass through. The cylinders (7) are locked in this way and keep the thrust valve (1) in the desired position. Position III directs oil from pump (12) to line (19), forcing the piston rod out. Oil 30 then returns via line (18) and (20). The weir valve is set at a lower level (21).

The pump (12) can be either a manual plunger pump or an electrically driven type. Four-way valve (14) can also be operated electrically and optionally also remotely.

10091 1 1

Claims (2)

1. Weir provided with a low-shaft thrust valve, characterized in that the thrust valve (1) is moved by two hydraulic cylinders (7) placed on both sides with an extended piston rod (8), which is rotatably mounted on the one side on the housing (4). pivot points (9) and rotatably mounted on thrust valve (1) on pivot points (10) located at a point which is eccentric with respect to the vertical axis of the thrust shaft (2) and some distance from the thrust shaft (2), cylinders (7) are adjusted with a pump (12) via a four-way valve (14) with closed center position (II). A weir provided with a low-lying shaft weir according to claim 1, characterized in that the two cylinders (7) are connected in parallel, with lines (18, 19) being fed below the weir. ***** 1009111