CN210031719U - A pressure tunnel buffer energy dissipation device - Google Patents

Abstract

The utility model relates to a pressure tunnel buffer energy dissipation device, which belongs to the field of hydraulic engineering. The utility model is provided with a rubber plate group in the pressure tunnel, the rubber plate group is composed of a plurality of rubber plates, the rubber plates are equidistantly arranged obliquely inside the pressure tunnel, and the rubber plates are evenly arranged with a number of diversion holes. The number and area of diversion holes on different rubber sheets are different. When the flow velocity in the pressure tunnel is high and there is a large flow, the water flow at the intersection is complicated and generates huge energy. The water flow hits the flush wall unit formed by the rubber sheet and the diversion hole, which can reduce most of the energy. The utility model solves the cavitation erosion caused by the high flow velocity in the pressure tunnel and the wear and tear of the high-speed sand-laden water flow, adopts multi-level layered buffering, degrades the water pressure, makes it flow smoothly, and fully dissipates energy.

Description

A pressure tunnel buffer energy dissipation device

technical field

The utility model relates to a pressure tunnel buffer energy dissipation device, which belongs to the field of hydraulic engineering.

Background technique

Pressure tunnels are often used for water diversion, power generation and sand discharge and flood discharge tunnels. The control section and the working gate are often set at the exit of the pressure relief tunnel. With the vigorous development of the water conservancy industry at home and abroad, pressure tunnels, as an important part of the flood discharge and sediment discharge system, are becoming increasingly giant and super giant, and their design theory, calculation methods and construction technology have been greatly developed. In this case, the design of pressure tunnels faces greater challenges. In order to prevent cavitation caused by high-speed water flow and wear and tear caused by high-speed sand-laden water flow, necessary protection measures can be taken to protect the tunnel. affect the operation of the entire system.

SUMMARY OF THE INVENTION

The utility model solves the cavitation erosion caused by the high flow velocity in the pressure tunnel and the wear and tear of the high-speed sand-laden water flow, adopts multi-level layered buffering, degrades the water pressure, makes it flow smoothly, and fully dissipates energy.

The technical scheme of the utility model is: a pressure tunnel buffer energy dissipation device, in the pressure tunnel 1

There is a rubber plate group in the middle, the rubber plate group is composed of a number of rubber plates, the rubber plates are arranged equidistantly and obliquely inside the pressure tunnel 1, and a number of diversion holes are evenly arranged on the rubber plate, and different rubber plates are diverted. The number and area of holes are different.

Further, the rubber plate group includes a first rubber plate 2, a second rubber plate 4 and a third rubber plate 6, which are sequentially arranged in the pressurized tunnel 1 at equal intervals along the water flow direction. The first rubber plate 2 A first guide hole 3 is arranged on the second rubber plate 4 , a second guide hole 5 is arranged on the second rubber plate 4 , and a third guide hole 7 is arranged on the third rubber plate 6 .

The area of the first guide hole 3 is larger than the area of the second guide hole 5 , and the area of the second guide hole 5 is larger than the area of the third guide hole 7 .

The number of the first guide holes 3 is smaller than the number of the second guide holes 5 , and the number of the second guide holes 5 is smaller than the number of the third guide holes 7 .

The working principle of the utility model is as follows: when the water flow in the pressure tunnel passes through the anti-scour wall unit composed of the rubber plate and the diversion hole, when the water flow passes through the first rubber plate, a large part of the kinetic energy and potential energy of the water flow is converted into When the heat energy generated by friction passes through the second and third grade rubber plates, the turbulent water flow tends to be stable, and the streamlined arrangement of more than one flush wall unit increases the flow area. The water flow is smoothly introduced into the downstream pipeline, which greatly degrades the water pressure and fully dissipates energy.

The beneficial effects of the utility model are that the structure is simple, the operation is easy, and the utility model is economical and practical. It solves the cavitation erosion caused by the high velocity in the pressurized tunnel and the wear and tear of the high-speed sand-laden water flow. The multi-level layered buffer is used to degrade the water pressure, so that it flows smoothly and fully dissipates energy.

Description of drawings

Fig. 1 is the sectional view of the pressure tunnel buffer energy dissipation device of the present invention;

Fig. 2 is the schematic diagram of the diversion hole of the pressure tunnel buffer energy dissipation device of the present invention;

Each label in the figure: 1-pressurized tunnel, 2-first rubber plate, 3-first diversion hole, 4-second rubber plate, 5-second diversion hole, 6-third rubber plate, 7- The third guide hole.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Example 1: As shown in Figures 1-2, a pressure tunnel buffer energy dissipation device is installed in the pressure tunnel 1.

A rubber plate group is arranged, and the rubber plate group is composed of several rubber plates. The rubber plates are equidistantly arranged in the interior of the pressure tunnel 1. The rubber plates are evenly arranged with a number of diversion holes, and the diversion holes are arranged on different rubber plates. are different in number and size. When the flow velocity in the pressurized tunnel 1 is high and there is a large flow, the flow pattern of the water flow at the intersection is complicated and huge energy is generated. The water flow hits the flush wall unit formed by the rubber sheet and the diversion hole, which can reduce most of the energy. More than one anti-scour wall unit formed by the rubber sheet and the diversion hole can be reasonably arranged in scale according to the size of the pressure tunnel and the flow rate. And the rubber sheet is suitable for equipment shock absorption, sealing, gasket and oil resistance, acid and alkali resistance and insulation purposes. The rubber sheet is mainly used for anti-corrosion, wear-resisting, impact-resisting protection of its equipment and devices, with simple structure and light weight. Its rubber sheet is wear-resistant and impact-resistant to protect its equipment and related pipeline equipment, and can prolong the service life of its equipment.

Example 2: As shown in Figure 1-2, the rubber plate group includes a first rubber plate 2, a second rubber plate 4 and a third rubber plate 6, which are sequentially arranged in the pressure tunnel 1 at an equal distance along the water flow direction. internal for maximum flow area. The first rubber plate 2 is provided with a first guide hole 3 , the second rubber plate 4 is provided with a second guide hole 5 , and the third rubber plate 6 is provided with a third guide hole 7 . All the rubber sheets are welded inside the pressurized tunnel 1, and form more than one impact wall unit with the diversion holes on it.

As shown in FIG. 2 , the area of the first guide hole 3 is larger than the area of the second guide hole 5 , and the area of the second guide hole 5 is larger than the area of the third guide hole 7 . The number of the first guide holes 3 is smaller than the number of the second guide holes 5 , and the number of the second guide holes 5 is smaller than the number of the third guide holes 7 .

When the water flow in the pressure tunnel 1 passes through the first rubber plate 2, a large part of the kinetic energy and potential energy of the water flow is converted into heat energy generated by friction. When passing through the second rubber plate 4 and the third rubber plate 6, the turbulent water flow tends to In addition, the streamlined arrangement of more than one flush wall unit increases the flow area. The water flow is smoothly introduced into the downstream pipeline, which greatly degrades the water pressure and fully dissipates energy.

The specific embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the art, the utility model can also be used without departing from the purpose of the present utility model. Various changes are made under the premise.

Claims (4)

1. A buffer energy dissipation device for a pressurized tunnel, characterized in that: a rubber plate group is provided in the pressurized tunnel (1), and the rubber plate group is composed of several rubber plates, and the rubber plates are equidistantly and obliquely arranged on the pressurized tunnel (1). Inside the tunnel (1), a number of diversion holes are evenly arranged on the rubber plate, and the number and area of the diversion holes on different rubber plates are different. 2 . The buffer energy dissipation device for a pressurized tunnel according to claim 1 , wherein the rubber plate group comprises a first rubber plate ( 2 ), a second rubber plate ( 4 ) and a third rubber plate ( 6 ). 3 . , and the three are sequentially arranged equidistantly and obliquely along the water flow direction inside the pressure tunnel (1). The first rubber plate (2) is provided with a first guide hole (3), and the second rubber plate (4) is provided with The second guide hole (5), the third rubber plate (6) is provided with a third guide hole (7). 3. The pressure tunnel buffer energy dissipation device according to claim 2, characterized in that: the area of the first diversion hole (3) is larger than the area of the second diversion hole (5), and the first diversion hole (3) has an area larger than that of the second diversion hole (5). The area of the second guide hole (5) is larger than the area of the third guide hole (7). 4 . The buffer energy dissipation device for a pressurized tunnel according to claim 2 , wherein the number of the first diversion holes ( 3 ) is smaller than the number of the second diversion holes ( 5 ). The number of the second guide holes (5) is smaller than the number of the third guide holes (7).

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