Semi-closed bifurcated pipe structure

Abstract

The utility model provides a semi-closed bifurcated pipe structure which comprises a diversion tunnel, and the diversion tunnel is communicated with a balance discharge hole through a bifurcated pipe. Water passing holes are uniformly formed in the pipe wall of the diversion tunnel and at the part communicated with the bifurcated pipe; the tail end of the diversion tunnel is connected with a diversion branch hole through a branch pipe, the diversion branch hole is connected with a corresponding unit, and the unit is connected with the regulating reservoir through a tail water tunnel; and the balance discharge hole is connected with the regulating reservoir through a discharge ball valve and a flow control valve. An incomplete cutting arrangement mode is adopted at the connecting part of the diversion tunnel and the balance discharge hole, and the water passing holes are uniformly formed in the pipe wall of the connecting part of the diversion tunnel and the balance discharge hole, so that water flow can normally enter the balance discharge hole from the water passing holes; on the other hand, head loss of water flow in the diversion tunnel is reduced, and power generation efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hydropower station construction and hydropower station operation and maintenance, especially designs a kind of semi-closed divarication pipe structure. BACKGROUND

[0002] The diversion type cascade hydropower station is usually in the river section with large slope and concentrated drop, and it is inconvenient to build dam, and it is connected by multiple water diversion tunnels with gentle slope.

[0003] The problem of this arrangement in actual operation is that when the unit of a certain level power station fails, the corresponding water diversion tunnel needs to be closed, at this time, the water supply of the lower and subsequent hydropower stations will be cut off, and then the normal power generation of the lower hydropower stations will be affected. In order to solve this problem, a balance discharge hole is connected to the water diversion tunnel, when a fault occurs, the lower power station is connected by opening the balance discharge hole to achieve normal water supply, and a discharge hole valve chamber needs to be set to control the normal discharge of the balance discharge hole.

[0004] At present, the connection arrangement between the balance discharge hole and the water diversion tunnel is that a hole is opened on the side wall of the water diversion tunnel, and then the balance discharge hole is connected at the hole position. The defect of this connection mode is that, since the water diversion tunnel is a water channel that is often passed through, and the balance discharge hole is a water channel that is not often passed through, when the water flows through the hole position of the water diversion tunnel, a certain resistance will be generated, and then the water head loss will be caused, which affects the power generation efficiency. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the existing technical problems, the main purpose of the utility model is to provide a semi-closed divarication pipe structure, which adopts an incomplete cutting arrangement at the position where the water diversion tunnel and the balance discharge hole are connected, uniformly processes water passing holes on the pipe wall of the connection position of the water diversion tunnel and the balance discharge hole, and then ensures that the water flow can normally enter the balance discharge hole through the water passing holes, on the other hand, reduces the water head loss of the water flow in the water diversion tunnel, and ensures the power generation efficiency.

[0006] In order to realize the above technical features, the purpose of the utility model is realized as follows: a semi-closed divarication pipe structure, comprising a water diversion tunnel, a balance discharge hole connected to the water diversion tunnel through a divarication pipe; the position of the pipe wall of the water diversion tunnel and the divarication pipe is uniformly processed with water passing holes; the tail end of the water diversion tunnel is connected with a water diversion branch tunnel through a branch pipe, the water diversion branch tunnel is connected with a corresponding unit, and the unit is connected with a regulating pool through a tail water tunnel; the balance discharge hole is connected with the regulating pool through a discharge ball valve and a flow control valve.

[0007] The water diversion tunnel has multiple water diversion tunnels, and each water diversion tunnel is connected with a balance discharge hole through a divarication pipe.

[0008] The pipeline on the diversion branch hole and before the unit is arranged with a unit ball valve, and the unit ball valve and the unit are arranged in the interior of the machine room.

[0009] The discharge ball valve and the flow control valve are arranged in the interior of the valve chamber.

[0010] The balance discharge hole is arranged below the diversion tunnel.

[0011] The pipeline between the flow control valve and the regulating pool is arranged with an energy dissipation device.

[0012] The interior of the regulating pool is arranged with an upper limit water level, a normal water storage level and a dead water level.

[0013] The lower diversion tunnel is connected to the regulating pool through the lower water inlet, and the lower diversion tunnel is connected to the pressure regulating chamber.

[0014] The utility model has the following beneficial effects:

[0015] 1. By using the incomplete cutting arrangement mode at the position where the diversion tunnel is connected with the balance discharge hole, the water flow can enter the balance discharge hole through the water passing holes arranged uniformly on the pipe wall at the connecting position of the diversion tunnel and the balance discharge hole, thereby ensuring that the water flow can enter the balance discharge hole normally, and on the other hand, the water head loss of the water flow in the diversion tunnel is reduced, and the power generation efficiency is ensured.

[0016] 2. The multiple diversion tunnels can be connected with the upstream reservoir, thereby simultaneously supplying water to multiple diversion branch holes, and thereby simultaneously driving multiple power generator units to generate power.

[0017] 3. The unit ball valve can be used to control the opening and closing of the unit. By being arranged in the interior of the machine room, the unit ball valve and the unit can be protected.

[0018] 4. The valve chamber can be used to store the discharge ball valve and the flow control valve, and can be used to control the discharge of the balance discharge hole.

[0019] 5. The arrangement mode of the balance discharge hole can be used to automatically discharge the diversion flow through the water flow self-weight.

[0020] 6. The energy dissipation device can dissipate the flow discharged from the balance discharge hole, thereby ensuring the stability of the water flow.

[0021] 7. The different water levels ensure the safe operation of the regulating pool. DRAWINGS

[0022] The utility model will be further described in combination with the drawings and examples.

[0023] Fig. 1 is a plan view of the utility model.

[0024] Fig. 2 is a longitudinal section view of the utility model.

[0025] Fig. 3 is a local view of the direct connection between the diversion tunnel and the balance release hole of the utility model.

[0026] In the drawing: diversion tunnel 1, diversion bifurcated pipe 2, bifurcated pipe 3, diversion branch tunnel 4, machine room 5, unit ball valve 6, unit 7, tailrace tunnel 8, regulating pool 9, balance release hole 10, valve chamber 11, release ball valve 12, flow control valve 13, energy dissipation facility 14, upper limit water level 15, normal storage water level 16, dead water level 17, lower intake 18, lower diversion tunnel 19, surge chamber 20. DETAILED DESCRIPTION

[0027] The embodiment of the utility model will be further explained in combination with the drawings.

[0028] Referring to Figs. 1-3 , a semi-closed diversion bifurcated pipe structure comprises a diversion tunnel 1, the diversion tunnel 1 is connected with a balance release hole 10 through a diversion bifurcated pipe 2; the pipe wall of the diversion tunnel 1 is uniformly processed with water passing holes 21 at the position communicated with the diversion bifurcated pipe 2; the end of the diversion tunnel 1 is connected with a diversion branch tunnel 4 through a bifurcated pipe 3, the diversion branch tunnel 4 is connected with a corresponding unit 7, the unit 7 is connected with a regulating pool 9 through a tailrace tunnel 8; the balance release hole 10 is connected with the regulating pool 9 through a release ball valve 12 and a flow control valve 13. By adopting the incomplete cutting arrangement mode at the position connected with the balance release hole, the water passing holes are uniformly processed on the pipe wall at the connected position, thereby ensuring that the water flow can normally enter the balance release hole through the water passing holes, on the other hand, the water head loss of the water flow in the diversion tunnel is reduced, and the power generation efficiency is ensured.

[0029] Further, the diversion tunnel 1 has multiple diversion tunnels, each of which is connected with a balance release hole 10 through a diversion bifurcated pipe 2. By adopting the above multiple diversion tunnels 1, the upstream reservoir can be connected, thereby simultaneously supplying water to multiple diversion branch tunnels 4, and thereby simultaneously driving multiple generator units to generate electricity.

[0030] Further, the unit ball valve 6 is arranged on the pipeline before the unit 7 on the diversion branch tunnel 4, and the unit ball valve 6 and the unit 7 are arranged in the interior of the machine room 5. The unit ball valve 6 can be used to control the opening and closing of the unit 7. By being arranged in the interior of the machine room 5, the unit ball valve 6 and the unit 7 are convenient to protect.

[0031] Further, the bleed ball valve 12 and the flow control valve 13 are arranged inside the valve chamber 11. The valve chamber 11 facilitates storage of the bleed ball valve 12 and the flow control valve 13, and facilitates subsequent discharge control of the balance discharge hole 10.

[0032] Further, the balance discharge hole 10 is arranged below the diversion tunnel 1. The arrangement of the balance discharge hole 10 facilitates automatic discharge of the diversion flow through the water flow self-weight.

[0033] Further, the flow control valve 13 is provided with an energy dissipation facility 14 on the pipeline between the flow control valve 13 and the regulating pool 9. The energy dissipation facility 14 can dissipate the flow discharged from the balance discharge hole 10, thereby ensuring the stability of the water flow.

[0034] Further, the regulating pool 9 is provided with an upper limit water level 15, a normal water storage level 16 and a dead water level 17 inside. The different water levels ensure the safe operation of the regulating pool 9.

[0035] Further, the regulating pool 9 is connected with a lower-level diversion tunnel 19 through a lower-level water inlet 18, and the lower-level diversion tunnel 19 is connected with a pressure regulating chamber 20. The arrangement facilitates water supply to the lower-level hydropower station through the lower-level diversion tunnel 19.

[0036] The working process and principle of the utility model are as follows:

[0037] In the specific operation process of the specific bifurcated pipe structure, when the units are normally operated, the bleed ball valve 12 of the balance discharge hole 10 is in a closed state, at this time, the water flow will be normally generated through the diversion branch hole 4, and the water head loss does not exist when the water flow passes through the bifurcated pipe 2.

[0038] When a unit fails, the corresponding unit ball valve 6 needs to be closed at this time, in order to balance the flow, the bleed ball valve 12 needs to be opened, and the water flow in the diversion tunnel 1 is introduced into the regulating pool 9 through the balance discharge hole 10.

[0039] After the unit maintenance is completed, the balance discharge hole 10 is closed again, and the normal water supply of the diversion tunnel 1 is ensured.

Claims

1. A semi-enclosed Boucherie tube structure, characterized by: The application relates to a water diversion tunnel system, which comprises a water diversion tunnel (1), a balance discharge hole (10) connected to the water diversion tunnel (1) through a branch pipe (2), water holes (21) evenly arranged on the wall of the water diversion tunnel (1) and communicated with the branch pipe (2), a water diversion branch tunnel (4) connected to the tail end of the water diversion tunnel (1) through a branch pipe (3), a corresponding unit (7) connected to the water diversion branch tunnel (4), a tail water tunnel (8) connected to the unit (7) and a regulating pool (9), and a discharge ball valve (12) and a flow control valve (13) connected to the balance discharge hole (10) and the regulating pool (9).

2. A semi-enclosed duct structure according to claim 1, wherein: The water diversion tunnel (1) has a plurality of water diversion tunnels, and each water diversion tunnel (1) is connected to a balance discharge hole (10) through a branch pipe (2).

3. The semi-enclosed duct structure according to claim 1, wherein: A unit ball valve (6) is arranged on the pipeline of the water diversion branch tunnel (4) and located in front of the unit (7), and the unit ball valve (6) and the unit (7) are arranged in a machine room (5).

4. The semi-enclosed duct structure according to claim 2, wherein: The discharge ball valve (12) and the flow control valve (13) are arranged in a valve chamber (11).

5. A semi-enclosed duct structure according to claim 2, wherein: The balance discharge hole (10) is arranged below the water diversion tunnel (1).

6. The semi-enclosed duct structure according to claim 1, wherein: An energy dissipation device (14) is arranged on the pipeline between the flow control valve (13) and the regulating pool (9).

7. The semi-enclosed duct structure according to claim 1, wherein: An upper limit water level (15), a normal water storage level (16) and a dead water level (17) are arranged in the regulating pool (9).

8. The semi-enclosed duct structure according to claim 1, wherein: A lower water diversion tunnel (19) is connected to the regulating pool (9) through a lower water inlet (18), and a pressure regulating chamber (20) is connected to the lower water diversion tunnel (19).

Images