RU2021704C1 - Plant watering device - Google Patents

Abstract

FIELD: automatic watering in hothouses, vegetable kitchen gardens, forcing beds. SUBSTANCE: device has tank, tank water filling unit connested to water supply source and distributing line connected with tank. Device has siphon arranged under tank bottom. Support of tank is displaced in horizontal plane towards siphon relative to projection of centre of mass of empty tank. Height of one of two stops is less than heihgt of support. Upper part of tank is made asymmetric relative to lower part of tank with displacement of centre of mass of this part of tank towards siphon behind support. Pipeline connecting device with water supply source has calibrated hole. Tank water filling unit has storage reservoir with discrete valve at inlet controlled by water level pickup. EFFECT: enlarged operating capabilities. 3 cl, 1 dwg

Description

 The invention relates to agriculture and can be used for automatic watering of plants in limited areas: in greenhouses, hotbeds, ridges in vegetable gardens, etc.

 Known systems for watering plants (Pantelev Y. Kh. Seasonal work in vegetable growing. M.: Agropromizdat, 1986, p. 40) include a distribution network, for example, piping, connected to a water source through a valve or other control element.

 The disadvantage of these devices is the need for human participation in the irrigation process.

 A prototype device is known that contains a filling tank connected to a water source by an automatic unit for filling the tank with water, and with a distribution network through an electromagnetic valve controlled by a clock mechanism.

 The disadvantage of the prototype is that to control irrigation you need a source of electrical energy of a fairly high power, providing power to the valve's electromagnet during the irrigation time. In the conditions of summer cottages, greenhouses, hotbeds, such a source is often located at a great distance or completely absent. Often, electric energy is supplied to suburban areas irregularly or at certain times of the day. This makes it impossible to carry out regular watering. The presence of a clock mechanism (even electronic) complicates the operation of the device, reduces its reliability.

 The purpose of the invention is to simplify the design and increase reliability.

 This goal is achieved by the fact that the known irrigation device comprising a tank, a tank filling unit with water, connected to a water supply source, and a distribution network connected to the tank are provided with two stops, a tank support and a siphon, the elbow of which is placed in an opening made in the tank wall in its upper part at the level of maximum filling of the tank, and the ascending branch is located at the bottom of the tank. The tank support is placed under its bottom and is displaced in the horizontal plane relative to the projection of the center of mass of the empty tank towards the siphon. Two stops are installed under the bottom of the tank on both sides symmetrically to the support. The height of the first stop located on the siphon side is less than the height of the support by b ≥ a ˙ R / d, where a is the distance from the upper edge of the siphon to the water level, R is the distance between the support and the first stop, d is the distance from the tank wall to supports. The height of the second stop is equal to the height of the support. The upper part of the tank is made asymmetric with respect to the vertical axis of the lower part of the tank, and the center of gravity of this part of the tank is biased towards the siphon behind the support. A calibrated hole is made in the pipeline connecting the device to the water supply. The tank can be made axisymmetric over the entire height. In this case, an empty sealed vessel is placed in the upper part of the tank, rigidly connected to the tank wall and having the volume of the part lying below the maximum filling level of the tank, V ≥ Δx ˙h ˙ D, where h is the height of the liquid column in the tank, D is the diameter ( the width) of the tank, Δ x is the displacement of the center of mass of the empty tank relative to the support. To improve the accuracy of the device, the tank filling unit contains a buffer storage tank, the input of which is connected via a discrete valve controlled by a level sensor to a water supply, and the output is through a pipeline with a calibrated opening with a tank.

 The invention is illustrated in the drawing.

 The device consists of a storage tank 1, the input of which is connected via a tank filling unit 2, made in the form of a drain tank with a float water level sensor and a discrete valve, and a calibrated hole 3 with a water supply source, for example, water supply. The outlet is made in the form of a siphon 4, passed through an opening in the wall of the tank 1, made at a height exceeding the maximum water level. The ascending branch of the siphon is located inside the tank 1 at its bottom, and the outlet is connected to the distribution irrigation network 5. The bottom of the tank 1 is installed on the top of the support 6, which has, for example, a triangular shape, placed so that this vertex is offset relative to the horizontal projection of the center of mass of the empty tank in side of the siphon by Δ x. Stops 7 and 8 are placed under the bottom of the tank, the top of the first of which is placed below the top of the support 6 by b ≥ a ˙ R / d, where a is the distance from the upper edge of the siphon to the water level at maximum tank filling, R is the distance from the stop 7 to the support 6, d is the distance from the support 6 to the edge of the tank 1. The top of the second stop 8 lies at the same level with the top of the support 6. At the top of the tank 1 from the side opposite to the siphon is a hollow container 9 having a volume V≥ Δx ˙h ˙D and located below the maximum water level in the tank.

 The device operates as follows.

 An empty tank, due to the displacement of the support 6 relative to the projection of the center of mass, rests on the stop 8. The filling of tank 1 takes place in small portions, the volume of which is determined by the volume of the buffer capacity of the tank filling unit 2, through a calibrated hole 3, the size of which is chosen so that the filling the tank occurred in a day or another specified period, a multiple of days. While water fills the lower part of the tank 1, the projection of the center of mass due to the symmetry of the lower part of the tank remains stationary. However, when the water reaches the vessel 9, the center of mass position will begin to shift in the direction of the siphon, and when the part of the vessel 9 having the volume V is immersed in water, the center of mass position will shift toward the siphon behind the support 6. The tank will lean towards the siphon and stand to the stop 7. At this moment, the siphon 4 will be filled with water, and the water will flow by gravity to the irrigation distribution network 5. As the water drains, the projection of the center of mass of the tank will gradually shift beyond support 6, and tank 1 will return to its original position. Watering will end when the end of the ascending branch of siphon 4, which is in the tank, is exposed.

 The device allows you to automate the irrigation of small summer cottages, gardens, etc. with prolonged absence of the host.

Claims (3)

1. A device for watering plants, containing a tank, a tank filling unit with water, connected to a water supply source, and a distribution network in communication with the tank, characterized in that, in order to simplify the design and increase reliability, it is equipped with two stops, tank support and siphon the knee of which is placed in the hole made in the wall of the tank in its upper part at the level of maximum filling of the tank, and its ascending branch is located at the bottom of the tank, while the support of the tank is placed under its bottom and is mixed in a horizontal plane about regarding the projection of the center of mass of the empty tank towards the siphon, in addition, two stops are installed under the tank bottom on both sides of the support symmetrically to it, the height of the first stop located on the side of the siphon is less than the height of the support by
b≥ a

,
where a is the distance from the upper edge of the siphon to the water level at maximum tank filling;
R is the distance between the support and the first emphasis;
d is the distance from the tank wall to the support,
and the height of the second stop is equal to the height of the support, and the upper part of the tank is asymmetric with respect to the vertical axis of the lower part of the tank and the center of gravity of this part of the tank is biased towards the siphon behind the support, while a calibrated hole is made in the pipeline connecting the device to the water supply. 2. The device according to claim 1, characterized in that the tank is asymmetric over the entire height, and in its upper part from the side opposite the siphon an empty airtight vessel is placed, rigidly connected to the tank wall and having a volume of a part lying below the maximum filling level of the tank,
V ≥ Δ x˙h˙D,
where h is the height of the liquid column in the tank;
D is the diameter (width) of the tank;
Δ x is the displacement of the center of mass of the empty tank relative to the support.  3. The device according to claim 1, characterized in that the tank filling unit contains a buffer storage tank, the input of which is connected via a discrete valve controlled by a level sensor to a water supply, and the output by means of a pipeline to a calibrated opening with a tank.

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