Lateral shore tower type water inlet / outlet of pumped storage power station

Abstract

The utility model discloses a lateral bank tower type water inlet / outlet of a pumped storage power station, which comprises a tunnel section and a gate section, the section of the tunnel section is round, the section of the gate section is square, the lateral bank tower type water inlet / outlet of the pumped storage power station further comprises a transition section, a gate rear adjusting section, a gate front adjusting section and a diffusion section, the head portion is connected with the tail portion of the tunnel section, the tail portion is connected with the gate rear adjusting section, the two ends of the gate section are connected with the tail portion of the gate rear adjusting section and the head portion of the gate front adjusting section respectively, and the diffusion section is connected to the tail portion of the gate front adjusting section. According to the arrangement mode, the length of the portion, outside the tunnel excavation line, of the tunnel is shortened, the topographic condition limitation of arrangement is smaller, on the other hand, the overall length of the tunnel and the water inlet / outlet is shortened, engineering investment is reduced, and high reliability and practicability are achieved.

Description

Technical Field

[0001] The utility model relates to the field of pumped storage power station engineering, in particular to a lateral shore tower type water inlet / outlet of a pumped storage power station. Background Art

[0002] At present, the common inlet / outlet of pumped storage power station is mostly arranged independently. According to the relationship between the water flow of the reservoir and the water diversion channel, it is divided into side inlet / outlet and well inlet / outlet. Side inlet / outlet can be divided into side shaft type, side slope type and side bank tower type; well inlet (outlet) can be divided into open well type, semi-open well type and cover well type.

[0003] The lateral bank tower type is suitable for water inlets and outlets where the water diversion channel enters the reservoir in a nearly horizontal direction and the reservoir bank has a gentle terrain and good geological conditions. The water inlet is arranged close to the bank slope, and the water inlet gate is arranged in a tower-shaped concrete gate well, which can be used as a bank slope retaining structure. The diffusion section and the trash rack section are located outside the tower body. The water inlets and outlets of the upper and lower reservoirs of the Guangzhou Pumped Storage Power Station, and the water inlets and outlets of the lower reservoirs of the Ming Tombs, Tai'an and Yixing Pumped Storage Power Stations all belong to this type.

[0004] The side bank tower inlet / outlet is often equipped with a long adjustment section between the gate section and the diffuser section, or between the diffuser section and the trash rack section, to ensure that the water flow conditions meet the requirements. There are two main reasons: first, the ratio of the maximum value to the average flow rate should be less than 1.5 during inflow and less than 2.0 during outflow; second, the unevenness of the flow rate of adjacent side and middle channels should not exceed 10%. The disadvantage of this arrangement is that in order to ensure better water flow conditions, the adjustment section is usually longer, so the size of the inlet / outlet is also longer, which may lead to large restrictions on the inlet / outlet layout and high engineering investment. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a lateral shore tower inlet / outlet of a pumped-storage power station. The length of the portion of the arrangement outside the tunnel excavation line is shortened, so that the terrain conditions for its arrangement are less restricted. On the other hand, the overall length of the tunnel and the inlet / outlet is shortened, the project investment is reduced, and the reliability and practicality are high.

[0006] In order to solve the above technical problems, the utility model is implemented through the following technical solutions: a lateral shore tower inlet / outlet of a pumped storage power station, including a tunnel section and a gate section, the tunnel section has a circular cross-section, the gate section has a square cross-section, and also includes a gradient section, a gate rear adjustment section, a gate front adjustment section and a diffusion section. The gradient section has a circular gradient square cross-section, the head is connected to the tail of the tunnel section, and the tail is connected to the gate rear adjustment section. The two ends of the gate section are respectively connected to the tail of the gate rear adjustment section and the head of the gate front adjustment section, and the diffusion section is connected to the tail of the gate front adjustment section.

[0007] Furthermore, the length of the adjustment section after the gate is the same as the gradual change section.

[0008] Furthermore, the length of the adjustment section before the gate is 0.5 times the length of the adjustment section after the gate.

[0009] The beneficial effects of the utility model are:

[0010] The inlet / outlet designed by the utility model effectively solves the problems of large layout restrictions and high engineering investment caused by the long size of the traditional lateral shore tower inlet / outlet. By arranging the gradient section and the adjustment section behind the gate section, the water flow can be effectively transitioned from the circular water-passing section of the tunnel section to the square water-passing section of the gate section, and it plays a role in buffering the flow rate of water and evenly distributing the cross-sectional flow rate. By arranging an adjustment section between the front of the gate section and the head of the diffusion section, it plays a role in buffering the flow rate of water and evenly distributing the cross-sectional flow rate. On the one hand, this layout form can shorten the length of the part outside the tunnel excavation line, making its layout less restricted by the terrain conditions. On the other hand, it shortens the overall length of the tunnel and the inlet / outlet, reduces the engineering investment, and has high reliability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the water inlet / outlet of the utility model;

[0012] Figure 2 It is a longitudinal section view of the main structure of the water inlet / outlet of the utility model.

[0013] In the figure: 1, tunnel section; 2, gradient section; 3, transition section after gate; 4, gate section; 5, transition section before gate; 6, diffusion section. DETAILED DESCRIPTION

[0014] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The described embodiments only serve as an explanation and should not limit the utility model.

[0015] like Figure 1 to Figure 2As shown, the utility model is a lateral bank tower water inlet / outlet of a pumped storage power station, comprising a tunnel section 1, a gradient section 2, a gate rear adjustment section 3, a gate section 4, a gate front adjustment section 5 and a diffusion section 6. The tunnel section 1 has a circular cross section, the gate section 4 has a square cross section, the gradient section 2 has a circular gradient square cross section, the head of the gradient section 2 is connected to the tail of the tunnel section 1, and the tail is connected to the gate rear adjustment section 3, which functions to allow the water flow in the pipeline to transition from the circular water-passing section in the tunnel to the square water-passing section of the same shape as the gate section; the gate rear adjustment section 3 is provided between the gradient section 2 and the gate section 4, which functions to adjust the water flow velocity and flow distribution, thereby achieving the purpose of improving the hydraulic characteristics. The gate front adjustment section 5 arranged at the rear end of the gate section 4 has the same function as the gate rear adjustment section 3. The gate rear adjustment section 3 has the same length as the gradient section 2. The gate front adjustment section 5 is 0.5 times the length of the gate rear adjustment section 3. The diffusion section 6 is connected to the tail of the adjustment section 5 before the gate.

[0016] Specifically, a pumped storage power station has a single unit rated flow of 75m 3 / s, adopting a one-tunnel two-machine layout, the lower reservoir inlet / outlet adopts a lateral shore tower inlet / outlet, which consists of a trash rack section, a diffuser section, a square section, a gate chamber section, an adjustment section and a gradient section. The total length of the lower reservoir inlet / outlet is 88.0m, of which the trash rack section is 10.0m long, the diffuser section is 40.0m long, the adjustment section before the gate is 5.0m long, the gate section is 13.0m, the adjustment section after the gate is 10.0m long, and the gradient section is 10.0m long. Each inlet / outlet is equipped with a 3-hole trash rack, and the size of the single-hole trash rack hole is 5.5m×10.2m (width×height).

[0017] After CFD simulation calculation, under each operating condition, the average flow velocity of the trash rack section at the inlet / outlet of the lower reservoir was less than 1m / s, and the diversion coefficient was between 0.9 and 1.1; the flow velocity unevenness coefficient under power generation conditions was less than 2.0, and the flow velocity unevenness coefficient under pumping conditions was less than 1.5, which met the requirements of the specification.

[0018] The inlet / outlet arrangement designed by the utility model effectively solves the problem that the adjustment section in the current commonly used solution is long, so the size of the inlet / outlet is also long, which may lead to large restrictions on the arrangement of the inlet / outlet and high engineering investment. By setting two adjustment sections, the length of the inlet / outlet outside the tunnel excavation line can be shortened, making the terrain conditions for its arrangement less restricted. On the other hand, the overall length of the tunnel and the inlet / outlet is shortened, reducing the engineering investment, and having high reliability and practicality.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lateral shore tower water inlet / outlet of a pumped storage power station, comprising a tunnel section (1) and a gate section (4), wherein the tunnel section (1) has a circular cross section and the gate section (4) has a square cross section, characterized in that: It also comprises a gradient section (2), a gate rear adjustment section (3), a gate front adjustment section (5) and a diffusion section (6); the gradient section (2) has a circular gradient square cross section, the head of which is connected to the tail of the tunnel section (1), and the tail of which is connected to the gate rear adjustment section (3); the two ends of the gate section (4) are respectively connected to the tail of the gate rear adjustment section (3) and the head of the gate front adjustment section (5); and the diffusion section (6) is connected to the tail of the gate front adjustment section (5).

2. A lateral shore tower water inlet / outlet of a pumped storage power station according to claim 1, characterized in that: The length of the gate rear adjustment section (3) is the same as that of the gradual change section (2).

3. A lateral shore tower water inlet / outlet of a pumped storage power station according to claim 1, characterized in that: The length of the adjustment section (5) in front of the gate is 0.5 times the length of the adjustment section (3) behind the gate.

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