Hydraulic ram

FIELD: construction.

SUBSTANCE: hydraulic ram comprises a feeding reservoir 17, a supplying pipeline 1, a body 2, a water-air cap 3 with a valve and a slide valve 4, an impact valve 6, made in the form of a sphere and placed on a stem, an injection check valve 7, a loading pipeline 16 with an overflow valve 14 and a hydraulic cylinder 11. The injection cavity 15 of the valve 14 is connected to the pipeline 16. The stem of the valve 6 is simultaneously a through stem 10 of the hydraulic cylinder 11 piston. The loading cavity 12 of the hydraulic cylinder 11 is connected to a drain hole 13 of the valve 14. The unloading cavity 18 of the hydraulic cylinder 11 is connected to atmosphere. The diameter of the hydraulic cylinder and travel of the impact valve are determined according to formulas.

EFFECT: provision of regulation in automatic mode and maintenance of maximum efficiency.

1 dwg, 1 tbl

 

The present invention relates to water-lifting devices that use potential energy of water, and can be used if the difference between water levels, such as dams ponds.

Known hydraulic RAM containing water stage, including the inlet pipe with the shock valve, pressure cap with the inlet and by-pass valves (EN 82798 U1, IPC 7 F04F02, publ. 17.12.2009).

The disadvantage of analog is a small performance.

Known hydraulic RAM containing water stage, including the inlet pipe with the shock valve, pressure cap with the inlet and bypass valves, air pressure level, an overflow chamber (RU 2239102 C1 IPC 7 F04F02, publ. 27.10.2004).

The disadvantage of this analogue is also low productivity, insufficient reliability.

The closest technical solution, taken as a prototype, is a hydraulic RAM, comprising a housing, an air cap with valve and slide valve, separated by an elastic membrane is a big turn on water and air parts, shock valve, made of spheres, discharge (return) valve, discharge piping, pressure vessel (EN 2468261 C1 IPC 7 F04F02, publ. 13.05.2011).

The disadvantage of the prototype is the inability to maintain and automatic regulation e is about the maximum performance depending on the input pressure without manual configuration lack of reliability in operation, a large intensity for powerful hydrocarbon.

Object of the invention is the regulation in automatic mode and maintain maximum performance (flow) hydraulic RAM at any pressure (inlet) pressure, improving the reliability of his work.

The technical result is ensured by the fact that the hydraulic RAM includes a supply tank, a supply pipe, a casing hydracarina, air cap with valve and slide valve, shock valve, made in the form of spheres and impaled on the rod, discharge check valve, but unlike the prototype for regulation in automatic mode and maintain maximum performance additionally installed load the pipeline with overflow valve and the hydraulic cylinder, and the injection cavity pressure relief valve connected to the load pipeline, the piston rod of the shock valve combined with a through piston rod of the hydraulic cylinder, the load cylinder chamber connected with the outlet of a pressure relief valve discharging to the atmosphere, the diameter of the piston cylinder is determined by the formula:

dC=13d2+dWt2 (1)

and stroke of the shock valve according to the formula:

y=13d(2)

where dC- diameter cylinder;

d is the diameter of the feed pipe;

dPCs- the diameter of the through piston rod of the hydraulic cylinder;

y - stroke of the shock valve.

Known General principle of the hydraulic RAM. Through the open drum valve fluid under pressure from the supply basin (created by the dam or the topography of the river) is dispersed in the feed tube until a certain speed, at which slams the shock valve. Due to a sharp decrease speed feed tube to 0 there is a hydraulic shock, i.e. a manifold increase in the pressure discharge valve opens the discharge valve, and the fluid begins to flow into an air cap until such time as the pressure discharge valve will not fall and he will not be closed. When this pressure drops to a certain value of the shock valve under the action of its own weight and the weight on it again opens, and the cycle repeats. As the pressure surge much higher than the pressure created by the pressure of the dam, the liquid from the air cap is under the action of compressed in the cap of the air discharge pipe rises in the pressure vessel to a height, much greater than the supply pressure. (Hovsepyan V.M. Hydraulic RAM and RAM setup. M: mechanical engineering, 1968, 124 S.)

Significant distinctive features that characterize the invention, namely the presence of a load pipe with overflow valve and the hydraulic cylinder, and the injection cavity pressure relief valve connected to the load pipeline, through the rod of the hydraulic cylinder is a piston rod of the shock valve, and the load cylinder chamber connected with the outlet of a pressure relief valve, the discharge cylinder chamber is connected to atmosphere, the piston cylinder has a certain amount determined by the formula (1), and the stroke of the shock valve adjusted by a certain amount determined by the formula (2), make it possible to automatically maintain peak performance hydraulic RAM whenever changing the height of a water column in the supply tank.

The drawing shows a diagram of the proposed hydraulic RAM.

Hydraulic RAM includes (see drawing) the supply pipe 1, the housing hydracarina 2, air cap 3 with the valve and the spool 4, separated by an elastic membrane 5 great progress on water and air parts, shock valve 6, is made of spheres, the discharge valve 7, magnet the sory line 8, water tank 9 to the discharge head h, the piston rod of the shock valve is simultaneously continuous rod 10 of the piston of the hydraulic cylinder 11. The output end of the through shaft 10 has a regulating nut 19. The cylinder 11 is divided by the piston onto the discharge cavity 18 that is connected with the atmosphere, and load the cavity 12, which is connected with the drain hole 13 pressure relief valve 14, a pressure cavity 15 pressure relief valve connected load of the pipe 16 with the supply tank 17 with the supply pressure H.

Hydraulic RAM operates as follows. Before working with the adjusting nuts 19 set calculated by the formula (2) the stroke of the shock valve 6. Hydrotron place below the water source and connect with him via a feed line 1. To start hydracarina in the work force open the shock valve 6, through-rod 10, the water part of the air cap 3 half-filled. By means of an air pump with pressure gauge through the valve 4 valve pump air into the air cap 3 depending on the height of the water in the water tower. Then, after a few pushes through the rod 10 in the direction of the shock valve 6 start hydrotron.

When opening shock valve 6 water coming through it and once oneasy, increases the pressure under the valve (from the feed pipe 1). When this pressure becomes sufficient to overcome the pressure in the load cavity 12 of the cylinder 11, created by the head H of the supply tank (dam) 17, the valve 6 begins to slam, moves with the piston of the cylinder 11 and displaces the water in the overflow valve 14, by moving the piston of the relief valve 14 and opening the drain hole 13. Water is displaced through the outlet 13 of the pressure relief valve 14, the shock valve 6 slams. Occurs hammer and pressure injection valve 7 increases dramatically, opening it. Comes injection phase of operation hydracarina. The water enters the air cap 3, compresses the air and under the action of compressed air through the discharge pipe 8 flows into the water tank 9 to the height of the pressure head h. During this phase, the piston pressure relief valve 14 is lowered down to the water pressure from the reservoir and covers the hole 13, again creating excessive pressure on the piston of the hydraulic cylinder 11, which transmits the load to the shock valve 6 through the stem 10 of the hydraulic cylinder 11. After completion of the injection pressure of the injection valve 7 is falling, it is closed, and the shock valve 6 is opened under the action of load through the stem 10 gidrol the Indra 11. The process is repeated.

In the course of the research the proposed technical solutions established that the maximum performance (flow) hydraulic RAM is dependent on the relationship of the effective area of the piston of the hydraulic cylinder to the cross-sectional area of the feed pipe and the relationship of the stroke of the shock valve to the sectional area of the feed pipe (see table).

Table
The rise of water h m510
H, md, mmSdmm2qmax
l/min
y-mmy/dSeffmm2Seff/Sdqmax,
l/min
y-mmy/dSeffmm2Seff/Sd
15019637.6140.279 5520.2813.8140.2195550.283
100785432.5320.3223430.29816.3320.3223480.299
20031420136.9670.33799640.31768.5670.33799680.317
1.550196314.6140.2796140.3137.3140.2796140.313
100785462320.3225820.32931.3320.3225750.328
20031420262.2670.337109000.347131670.337108400.345
250196323.2140.2796580.3311.6140.2796550.33
100785499320.3227580.3549.5320.3227340,348
20031420415670.337115900.369207.2670.337114600.365
N - m, the pressure dam
h - m, the rise of water
d - mm, size of hydracarina (the diameter of the feed pipe)
mm2the sectional area of the feed tubes
mm2, the effective area of the hydraulic cylinder
qmax- l/min, maximum performance (flow rate) of hydracarina

The data analysis reflected in the table, allows you to apply in engineering practice formulas (1) and (2).

Thus, to ensure and maintain maximum performance (flow) hydraulic RAM diameter of the cylinder is determined by the formula:

dC=13d2+dWt2(1)

and the stroke of the shock valve set regulating nuts through piston rod of the hydraulic cylinder by an amount recommended the controls to be determined by the formula

y=13d(2)

where dC- diameter cylinder;

d is the diameter of the feed pipe;

dPCs- the diameter of the through piston rod of the hydraulic cylinder;

y - stroke of the shock valve.

Pre-setting the diameter of the feed pipe and selecting the diameter of the rod of the hydraulic cylinder, by the formulas (1) and (2) determine the diameter of the piston cylinder and the stroke of the shock valve, providing the maximum flow hydraulic RAM.

For example, for a hydraulic RAM, in which the diameter of the feed pipe d=100 mm, the diameter of the piston rod of the hydraulic cylinder dPCs=10 mm, the stroke of the shock valve, defined by the formula (2), y=34 mm, the diameter of the piston cylinder defined by the formula (1), dC=59 mm, when the supply pressure H=2 m and discharge head h=10 m get the best possible performance (flow rate) of hydracarina 49,5 l/min

The proposed solution also allows you to reduce the intensity and reduce the dimensions of the powerful (with large diameter feed lines) hydraulic Taranov through the use of a hydraulic cylinder instead of the usually applied in a powerful hydrocarbo other load elements and to maintain maximum make inost in automatic mode.

Hydraulic RAM containing a supply tank, a supply pipe, a casing hydracarina, air cap with valve and slide valve, shock valve, made in the form of spheres and impaled on the rod, discharge check valve, characterized in that the control is in automatic mode and maintain maximum performance additionally installed load the pipeline with overflow valve and the hydraulic cylinder, and the injection cavity pressure relief valve connected to the load pipeline, the piston rod of the shock valve combined with a through piston rod of the hydraulic cylinder, the load cylinder chamber connected with the outlet of a pressure relief valve discharging to the atmosphere, the piston diameter of the cylinder is determined by the formula:
dC=13d2+dWt2,(1)
and stroke of the shock valve according to the formula:
y=13d,(2)
wheredC- diameter cylinder;
d- the diameter of the feed pipe;
dPCs- the diameter of the through piston rod of the hydraulic cylinder;
y- stroke of the shock valve.



 

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