Balanced discharge hole integrated valve chamber structure

Abstract

The utility model provides a balance discharge hole integrated valve chamber structure which comprises a plurality of diversion tunnels, the diversion tunnels are connected with flow balance discharge holes, and the flow balance discharge holes are connected with a regulating reservoir through discharge ball valves and flow regulating valves; an outlet of the diversion tunnel is connected with a plurality of diversion branch holes which are arranged in parallel, the diversion branch holes are connected with a unit through unit ball valves, the unit is connected with a regulating reservoir through a first tailrace tunnel, the first tailrace tunnel is provided with a tailrace tunnel bulkhead gate, and the tailrace tunnel bulkhead gate is connected with the regulating reservoir through a second tailrace tunnel; the discharge ball valve, the flow adjusting valve and the tailrace tunnel bulkhead gate are all arranged in the tailrace tunnel bulkhead gate chamber. The discharge hole valve chamber and the tail gate chamber are integrally arranged to replace the existing mode of integrated arrangement with a plant, so that the plant scale and the construction difficulty are effectively reduced, and meanwhile, the arrangement difficulty and the work amount of the discharge hole valve chamber are also reduced.

Description

Technical Field

[0001] This utility model belongs to the field of hydropower station construction and operation and maintenance technology, and in particular, it designs an integrated valve chamber structure for a balanced discharge tunnel. Background Technology

[0002] Diversion-type cascade hydropower stations are typically multiple hydropower stations connected by multiple water diversion tunnels in river sections with large gradients and concentrated drops, where it is not convenient to build dams.

[0003] In actual operation, this layout presents a problem: when a unit at a certain level of the hydropower station malfunctions, the corresponding water diversion tunnel needs to be shut down, cutting off the water supply to downstream hydropower stations and affecting their normal power generation. To address this, a balancing spillway is connected to the water diversion tunnel. In the event of a malfunction, the balancing spillway is opened to connect to the downstream power station, ensuring normal water supply. However, a valve chamber is needed to control the normal discharge from the balancing spillway. The current proposed solution is to share the valve chamber with the generator room. However, given the already large excavation scale of the generator room, integrating the valve chamber with it would further increase the excavation workload and construction difficulty. Utility Model Content

[0004] To address the existing technical problems, the main objective of this utility model is to provide an integrated valve chamber structure for a balanced discharge tunnel. By integrating the discharge tunnel valve chamber with the tailgate chamber, it replaces the current method of integrating with the plant, effectively reducing the plant size and construction difficulty, as well as the layout difficulty and workload of the discharge tunnel valve chamber.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: an integrated valve chamber structure for a balanced discharge tunnel, comprising multiple water intake tunnels, with a flow balanced discharge tunnel connected to each water intake tunnel, and the flow balanced discharge tunnel connected to the regulating pool through a discharge ball valve and a flow regulating valve.

[0006] The outlet of the water diversion tunnel is connected to multiple parallel water diversion branch tunnels. The water diversion branch tunnels are connected to the generating units through the unit ball valves. The generating units are connected to the regulating pool through the first tailrace tunnel. The tailrace tunnel maintenance gate is installed on the first tailrace tunnel. The tailrace tunnel maintenance gate is connected to the regulating pool through the second tailrace tunnel.

[0007] The discharge ball valve, flow regulating valve, and tailrace tunnel maintenance gate are all located inside the tailrace tunnel maintenance gate chamber.

[0008] The water diversion tunnel is connected to the flow balancing discharge tunnel via the first branch pipe.

[0009] The diversion tunnel is connected with the corresponding diversion branch tunnel through the second branch pipe.

[0010] All the unit ball valves and units are arranged inside the powerhouse.

[0011] The flow balance release hole is arranged below the powerhouse.

[0012] The flow regulating valve is provided with energy dissipation facilities between the flow regulating valve and the regulating pool.

[0013] The tail water tunnel maintenance gate chamber is internally provided with a maintenance platform, the tail water tunnel maintenance gate is arranged at the position of the tail water tunnel maintenance gate well, and the release ball valve is arranged at the position of the ball valve well.

[0014] The regulating pool is internally provided with an upper water level, a normal water storage level and a dead water level.

[0015] The regulating pool is internally provided with an upper water level, a normal water storage level and a dead water level.

[0016] The utility model has the following beneficial effects:

[0017] 1. By integrating the release hole valve chamber and the tail gate chamber, the current integrated arrangement with the powerhouse is replaced, the size and construction difficulty of the powerhouse are effectively reduced, and the arrangement difficulty and engineering quantity of the release hole valve chamber are also reduced.

[0018] 2. The first branch pipe can realize the connection between the flow balance release hole and the diversion tunnel.

[0019] 3. The second branch pipe can realize the connection between the diversion branch tunnel and the diversion tunnel.

[0020] 4. The corresponding unit ball valves and units are arranged inside the powerhouse, which facilitates subsequent control of the units and operation of the unit ball valves.

[0021] 5. The arrangement mode facilitates subsequent replenishment of the flow of the lower hydropower station through the flow balance release hole during unit maintenance.

[0022] 6. The energy dissipation facilities can realize energy dissipation of the water flow entering the regulating pool.

[0023] 7. The maintenance platform facilitates subsequent maintenance operation of the valves inside the tail water tunnel maintenance gate chamber.

[0024] 8. The water level line arrangement mode can facilitate control of the water level inside the regulating pool.

[0025] 9. By the above arrangement, water supply to the lower hydropower station is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model will be further described below in combination with the drawings and examples.

[0027] Figure 1 is the top view of the utility model.

[0028] Figure 2 is the longitudinal section view of the utility model.

[0029] Figure 3 is the Figure 1 or A-A view in Fig. 2.

[0030] In the figure: diversion tunnel 1, first branch pipe 2, second branch pipe 3, flow balance release hole 4, diversion branch tunnel 5, powerhouse 6, unit ball valve 7, unit 8, first tail water tunnel 9, tail water tunnel maintenance gate chamber 10, tail water tunnel maintenance gate 11, second tail water tunnel 12, release ball valve 13, flow regulating valve 14, regulating pool 15, lower power station water inlet 16, lower diversion tunnel 17, surge chamber 18, energy dissipation facility 19, maintenance platform 20, tail water tunnel maintenance gate well 21, ball valve well 22, upper water level 23, normal storage water level 24, dead water level 25. DETAILED DESCRIPTION

[0031] The embodiment of the utility model will be further described below in combination with the drawings.

[0032] Referring to Figures 1-3 , a balance release hole integrated valve chamber structure, comprising a plurality of diversion tunnels 1, the diversion tunnel 1 is connected with flow balance release hole 4, flow balance release hole 4 is connected with regulating pool 15 through release ball valve 13 and flow regulating valve 14;The outlet of diversion tunnel 1 is connected with a plurality of parallelly arranged diversion branch tunnels 5, diversion branch tunnel 5 is connected with unit 8 through unit ball valve 7, unit 8 is connected with regulating pool 15 through first tail water tunnel 9, first tail water tunnel 9 is provided with tail water tunnel maintenance gate 11, tail water tunnel maintenance gate 11 is connected with regulating pool 15 through second tail water tunnel 12;Release ball valve 13, flow regulating valve 14 and tail water tunnel maintenance gate 11 are all arranged in the interior of tail water tunnel maintenance gate chamber 10. By the integrated arrangement of release hole valve chamber and tail gate chamber, the current and powerhouse integrated arrangement is replaced, the scale of powerhouse and construction difficulty are effectively reduced, and the arrangement difficulty and engineering quantity of release hole valve chamber are also reduced.

[0033] Further, the diversion tunnel 1 is connected with flow balance release hole 4 through first branch pipe 2. By adopting the above first branch pipe 2, the connection between flow balance release hole 4 and diversion tunnel 1 can be realized.

[0034] Further, the diversion tunnel 1 is connected with the corresponding diversion branch tunnel 5 through the second branch pipe 3. The connection between the diversion branch tunnel 5 and the diversion tunnel 1 can be realized through the second branch pipe 3.

[0035] Further, all the unit ball valves 7 and units 8 are arranged inside the powerhouse 6. Through the arrangement of the unit ball valves 7 and units 8 inside the powerhouse, subsequent control of the units 8 and operation of the unit ball valves 7 are facilitated.

[0036] Further, the flow balance discharge hole 4 is arranged below the powerhouse 6. Through the arrangement, subsequent replenishment of the flow of the lower hydropower station through the flow balance discharge hole 4 during unit maintenance can be realized.

[0037] Further, the flow regulating valve 14 and the regulating pool 15 are provided with the energy dissipation facility 19. Through the energy dissipation facility 19, the water flow entering the inside of the regulating pool 15 can be dissipated.

[0038] Further, the tail water tunnel maintenance gate chamber 10 is provided with a maintenance platform 20, the tail water tunnel maintenance gate 11 is arranged at the position of the tail water tunnel maintenance gate well 21, and the discharge ball valve 13 is arranged at the position of the ball valve well 22. Through the maintenance platform 20, subsequent maintenance work of the valves inside the tail water tunnel maintenance gate chamber 10 is facilitated.

[0039] Further, the inside of the regulating pool 15 is provided with an upper water level 23, a normal water storage level 24 and a dead water level 25. Through the arrangement of the water level lines, the water level inside the regulating pool 15 can be controlled.

[0040] Further, the regulating pool 15 is provided with a lower hydropower station water inlet 16 on the other side, and the lower hydropower station water inlet 16 is connected with the surge chamber 18 through the lower diversion tunnel 17. Through the arrangement, water supply to the lower hydropower station is facilitated.

[0041] The working process and principle of the utility model are as follows:

[0042] Through the system, during the construction process of the flow balance discharge hole 4, the discharge ball valve 13, the flow regulating valve 14 and the tail water tunnel maintenance gate 11 are arranged inside the tail water tunnel maintenance gate chamber 10, and the two share a set of tail water tunnel maintenance gate chamber 10, so that the construction difficulty is effectively reduced, and the construction cost is saved.

Claims

1. A balanced bleed hole integrated valve chamber structure, characterized by: The water diversion tunnel (1) is connected with the flow balance discharge hole (4), the flow balance discharge hole (4) is connected with the adjusting pool (15) through the discharge ball valve (13) and the flow regulating valve (14); The outlet of the water diversion tunnel (1) is connected with the water diversion branch tunnel (5), the water diversion branch tunnel (5) is connected with the unit (8) through the unit ball valve (7), the unit (8) is connected with the adjusting pool (15) through the first tail water tunnel (9), the first tail water tunnel (9) is provided with the tail water tunnel maintenance gate (11), the tail water tunnel maintenance gate (11) is connected with the adjusting pool (15) through the second tail water tunnel (12); The discharge ball valve (13), the flow regulating valve (14) and the tail water tunnel maintenance gate (11) are arranged in the tail water tunnel maintenance gate chamber (10).

2. The balanced bleed hole integrated valve chamber structure of claim 1, wherein: The water diversion tunnel (1) is connected with the flow balance discharge hole (4) through the first branch pipe (2).

3. The balanced bleed hole integrated valve chamber structure of claim 1, wherein: The water diversion tunnel (1) is connected with the corresponding water diversion branch tunnel (5) through the second branch pipe (3).

4. The valve chamber structure of claim 1, wherein: All the unit ball valves (7) and the units (8) are arranged in the factory building (6).

5. The balanced bleed hole integrated valve chamber structure of claim 4, wherein: The flow balance discharge hole (4) is arranged below the factory building (6).

6. The valve chamber structure of claim 1, wherein: The flow regulating valve (14) and the adjusting pool (15) are provided with the energy dissipation facility (19).

7. The valve chamber structure of claim 1, wherein: The tail water tunnel maintenance gate chamber (10) is provided with the maintenance platform (20), the tail water tunnel maintenance gate (11) is arranged in the tail water tunnel maintenance gate well (21), and the discharge ball valve (13) is arranged in the ball valve well (22).

8. The balanced bleed hole integrated valve chamber structure of claim 1, wherein: The adjusting pool (15) is provided with the upper water level (23), the normal storage water level (24) and the dead water level (25).

9. The balanced bleed hole integrated valve chamber structure of claim 1, wherein: The adjusting pool (15) is provided with the lower power station water inlet (16) on the other side, the lower power station water inlet (16) is connected with the pressure regulating chamber (18) through the lower water diversion tunnel (17).

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