SU1303656A1 - Deep-water transition between ponds - Google Patents

Abstract

The invention relates to the field of hydraulic engineering, in particular, to devices designed to close deep-seated pressure conduits of a large cross-section, preferably temporary. The purpose of the invention is to reduce the material consumption of the shell and increase reliability of operation. A shut-off device is inserted into the narrowing shutter chamber 2 of the conduit 1 through the inlet 3, containing closures 7 and 8, made in the form of elastic shells filled with water and placed in a closed bag-shaped net 9. The aeration tube 10 is connected to the conduit 1 behind the stopper chamber 2, In the stream of chamber 2, channels 4 and 5 are made, which connect the middle part of chamber 2 with the lower and upper pools, respectively. When water enters the interfacial space 6 through channel 5, it freely flows out from channel 4, as a result of which hydrostatic pressure is established in inter-gate space 6 with a piezometric level at the height of water spout from channel 4. The pressure difference acting on the locking device is evenly distributed to the gates 7 and 8. 1 h, p. f-ly, 3 yl. I (L oo about with about: SP 05

Description

The invention relates to hydraulic engineering, namely, to deep gates intended to close pressure pipes, preferably temporary, high-pressure and large in cross-section.

The aim of the invention is to reduce the material consumption of the shell and increase reliability of operation.

FIG. Figure 1 shows the deep interbuff transition in the closed state in FIG. 2 - the same, at the moment of the locking device being drawn into it by the flow of water; in fig. 3 strips of a grid in which locks are placed, cross section.

The deep inter-ridge junction (Fig. 1) includes a water line 1, a shut-off chamber 2 with an inlet opening 3 into the chamber 2 on the side of the headwater and channels 4 and 5 connecting the middle part 6 (inter-gate space) of the shut-off chamber 2 respectively to the lower and upper the pools, and the locking device in the sealing chamber 2, containing the valves 7 and 8 of elastic shells filled with water, and a closed bag-shaped mesh 9, in which the valves 7 and 8 are placed.

Channel 4 rises to the height of the maximum calculated piezometric water level H, in the inter-gate space 6 and exits, for example,

In this case, first, the shutter 7 is drawn into the chamber 2, which, through the grid 9, is slowed down by the shutter 8. Therefore, the shutter 7 enters the shutter.camera 2 with a lower speed than the water flow. The shutter 7 touches the walls of the chamber 2, deforms and inhibits the flow, and draws a grid 9 into the chamber 2.

into the aeration pipe 10, and the channel 5 of a limited section, is below 35 atvor 8, which also concerns the water level H. camera 2, deforms and slows down

flow. Gate

The end of the attraction body 12 is connected to the end of the closed bag-shaped net 9 facing the downstream by means of a flexible link 11 40. The body 12 has a small, in comparison with the valves 7 and 8, the sail and can have a reserve of buoyancy as more zero when closing the conduit 1 with non-pressure movement of water in it, and less than zero when closing the conduit 1 with pressure movement of water in it.

The free discharge of water from channel 4 through the weir 13 (Fig. 1) is carried out, for example, into the aeration pipe 10 at level v, which is located above the water level in the lower pool.

7 (Fig. 1) under the action of the load from external water, exceeding the load-carrying capacity of the shutter 7, passes the middle part 6 of chamber 2 and releases it, gives an exit from the channel 5 and the entrance to the channel 4. This occurs directly during the closing of the conduit 1 or as raising the water level in the upstream after closing the waterway 1.

Since the cross-sectional area of the channel 4 exceeds (usually many times) the limited cross-sectional area of the channel 5, the water from the inter-gate space 6 that enters it through channel 5 is freely drained from the channel 4, and in inter-gate space 6 it sets 50

and below the water level in the upstream and

divides the head H - the excess of the level is the constant hydrostatic pressure in the upper pool above the water level with the piezometric level

in the downstream - into two usually equal to the height of H, the outflow of water from the channel 4.

Ny parts: H, - pressure on the bolt 7 As a result, the gate 7 finally

and Hjp - the pressure on the bolt 8. stops in the cylindrical

Channel 5, the cross section of which is many times smaller than the cross section of channel 4, is below the V mark.

The grid 9 is made of soft trapezoidal cross-section strips, with the smaller bases of the trapeziums obtained in sections, the strips adhere to the shell (Fig. 3).

 The deep inter-rib transition works as follows (Fig. 2).

The elastic shells of the valves 7 and 8 are placed in a bag-shaped grid 9, after which the grid 9 is closed, the shells 7 and 8 are filled with water, and the body 12 is attached to the end of the grid 9 by means of a flexible connection 11. The locking device is assembled in water to the inlet 3 of the conduit 1 so that the first in the water

20

25

thirty

Water 1 involved body 12 (Fig. 2). As a result of the hydrodynamic effect of the flow of water on the body 12, the entire locking device is drawn into the sealing chamber 2 and closes the conduit 1.

In this case, first, the shutter 7 is drawn into the chamber 2, which, through the grid 9, is slowed down by the shutter 8. Therefore, the shutter 7 enters the shutter.camera 2 with a lower speed than the water flow. The shutter 7 touches the walls of the chamber 2, deforms and inhibits the flow, and draws a grid 9 into the chamber 2.

35 Atvor 8, which also applies to the camera O 2, deforms and slows down

Atvor 8, which also touches Ste-O camera 2, deforms and brakes

flow. Gate

7 (Fig. 1) under the action of the load from external water, exceeding the load-carrying capacity of the shutter 7, passes the middle part 6 of chamber 2 and releases it, gives an exit from the channel 5 and the entrance to the channel 4. This occurs directly during the closing of the conduit 1 or as raising the water level in the upstream after closing the waterway 1.

Since the cross-sectional area of the channel 4 exceeds (usually many times) the limited cross-sectional area of the channel 5, the water from the interfacial space 6 that enters it through the channel 5 is freely drained from the channel 4, and in interfacial space 6 it sets

parts of the shutter chamber 2. The shutter 8 enters the cylindrical part of the chamber 2 partially and stops, without fully exhausting its carrying capacity .. 5

Thus, when the conduit 1 is closed, the shutter 7 is acted upon by external water with excess pressure from the upstream side above the water pressure on the downstream side equal to 10 – hundredth water column H, and to shutter 8 equal to Hj, and H where H is the difference in water levels in pools.

The length of the grid 9 is made such that when the shutter 7 15 releases into the channel 4, the shutter 8 waterproofly blocks the water path, and the shutter 8 is drawn into the chamber 2 by the shutter 7 mainly without breaking the strength of 20 mesh elements 9. At the same time water from the interfacial space through channel 4 is squeezed out into the downstream.

The complexity of the depressurization of the valve is due to the fact that the pressure inside the valves 7 and 8 is different (in valve 8 is greater than in valve 7), therefore the cavity of the valves cannot be communicating.

Claims (2)

1. A deep interbore transition, including a water line connecting the upper and lower pools, aeration pipe. bu, a variable section shutter chamber located in front of the conduit, an inlet to the shutter chamber from the headwaters, a locking device containing a shutter of an elastic shell in the form of a sealed sphere filled with water, the diameter of which is smaller than the diameter of the inlet to the stopper chamber and larger than the diameter of the conduit , characterized in that, in order to reduce the material intensity of the shell The cross section of channel 4 is prescribed from the condition of increasing the reliability of operation, Catch, so that the piezometric level of the camera is equipped with two channels in the inter-gate space of 6 lambs, of which one is connecting It was close (practically equal to the middle part of the sealing chamber with air) to the V mark of the weir with the 13th flow tube, and the other to connect (Fig. 1) to drain the water from channel 4. This 30n the middle part of the shutter chamber is possible if the velocity VI head in channel 4 is small. Need 8 go to. (speeds) and respectively areas) 5 35 The function of channel 5 is to reliably meet the condition Ift + qs Tr where qg and q are possible .Q values filtering water through the valves 8 and 7 (on the grid 7, the seams and cracks in the wall of the conduit). Based on the smallness of q and qg, the diameter of the channel 5 is small, for example, about 1-2 cm, the diameter of the channel 4-45 is about 5-10 cm and more. Removing the locking device from the conduit 1 is possible after equalizing the pressure on the gates 7 and 8 s. The upper tail with the cross-sectional area of the first channel is larger than the cross-sectional area of the second channel, while the output of the first channel is made in the form of a weir, which is higher than the water level in the lower reach and lower than the water level in the upper reach; below the weir mark, and the locking device is additionally equipped with an elastic sheath gate in the form of a sealed sphere filled with water, and placed in a grid. 2. The transition according to claim 1, characterized in that the locking device is provided with an attractive and flexible coupling body, while the flexible coupling is attached at one end to the attraction body, and the other end to the end one. 2. The transition according to claim 1, characterized in that the locking device is provided with an attracting body and a flexible connection, wherein the flexible connection is attached at one end to the attraction body and the other end to the end connection. both sides (installation of the main za-50 creation or performance of a traffic jam in the water-side towards the downstream, de) and depressurization of shells 7 and 8. parts of the grid. The difficulty of depressurization of the closures is due to the fact that the pressure inside the closures 7 and 8 is different (in the closure 8 is greater than in the closure 7), therefore the cavities of the closures cannot be communicating. Invention Formula 1. A deep inter-ridge junction, including a water line connecting the upper and lower pools, an aeration tube, a variable cross-section shut-off chamber located in front of the conduit, an inlet to the shutter chamber from the upper reach, a locking device containing an elastic sheath gate a sealed sphere filled with water, the diameter of which is smaller than the diameter of the inlet to the sealing chamber and larger than the diameter of the conduit, characterized in that, in order to reduce the material intensity of the shell the middle of the shutter chamber The upper tail with the cross-sectional area of the first channel is larger than the cross-sectional area of the second channel, while the output of the first channel is made in the form of a weir, which is higher than the water level in the lower reach and lower than the water level in the upper reach; below the weir mark, and the locking device is additionally equipped with an elastic sheath gate in the form of a sealed sphere filled with water, and placed in a grid. 2. The transition according to claim 1, characterized in that the locking device is provided with an attractive and flexible coupling body, while the flexible coupling is attached at one end to the attraction body, and the other end to the end one. facing downstream, eight X v XTVTVU  Fi.: 5 72