CN102966076B - Liftable rigid float interception system capable of being used for water inlet of large-sized power station - Google Patents

Abstract

The invention discloses a liftable rigid floating retaining system that can be used for the water inlet of a large-scale power station, comprising: at least one rigid long straight piece; a floating piece, which is connected with the rigid long straight It floats on the water surface in a horizontal state; the blocking assembly that prevents the rigid long straight parts from drifting into the power station with the water flow is fixed at the water inlet. The invention is not easy to break, and is durable; the floating parts can make the rigid long straight parts float on the water surface at any time, ensure that the floating block can rise and fall with the water level, and can intercept the floating objects in time; the blocking component can prevent the rigid long straight parts from floating in with the water flow into the power station. The invention replaces the traditional flexible structure with a rigid structure, which is not easy to be washed away by water, and at the same time, due to its rigid boundary, it can well guide large-volume floating objects to the downstream of the power station, which is safe and reliable. The invention can be applied to the water inlet of a large power station to intercept floating objects.

Description

A Liftable Rigid Drift Retaining System Applicable to Water Inlets of Large Power Stations

technical field

The invention relates to a drift-stopping system for a water inlet of a large-scale power station.

Background technique

A hydropower station is a comprehensive engineering facility that converts water energy into electrical energy. It generally consists of reservoirs formed by water retaining and drainage structures, water diversion systems of hydropower stations, power plants, electromechanical equipment, etc. Use these buildings to concentrate the drop of natural water flow to form a water head, collect and adjust the flow of natural water flow, and send it to the water turbine. Through the joint operation of the water turbine and the generator, the concentrated water energy is converted into electrical energy, and then through the transformer, switch Stations and transmission lines, etc. input electric energy into the grid.

For low-head power stations on plain rivers, due to the large flow of the river and the location downstream, many floating objects in the river, such as dead wood, plastic, foam and domestic garbage, will move with the huge diversion flow of the water inlet of the power station. In order to prevent these floating After entering the forebay of the power station, the waste is sucked into the generator set, which will cause damage to the unit or affect the normal operation of the unit. In the forebay of the power station, it is generally necessary to design a floating row.

Existing drift arresting systems are generally flexible. Referring to Fig. 1 and Fig. 2, the traditional drift arresting system generally includes a long steel wire rope 1 with a plurality of buoys 2 connected in series in the middle of the steel wire rope 1, and the two ends of the steel wire rope 1 are fixed at both ends of the water inlet through anchor piers 3. After the buoys 2 are connected in a string, they float on the water surface to form a barrier floating row, which can rise and fall up and down immediately with the change of the water level, and intercept the floating objects on the water surface. Because it is connected in series with steel wire ropes, the drift arresting system has certain flexibility. But its defects are also obvious: during the flood period, when the river flow velocity is high, the steel wire rope is often easily broken when it is impacted by the huge water flow, thus losing its drift blocking effect. This often occurs in many domestic hydropower stations. Although it can be repaired later, This will affect the normal operation of the power station and cause large economic losses; in addition, because the flexible floating barrier swings back and forth under the action of the water flow, it has a poor guiding effect on the larger floating objects and cannot guide the floating objects smoothly. To the downstream, and it is a steel wire structure, which often causes entanglement of aquatic plants, making cleaning more difficult.

Contents of the invention

The technical problem to be solved by the present invention is: to provide a liftable rigid drift arresting system, which must at least meet the following conditions: (1), not easy to break; (2), can rise and fall with the water level; (3), have interception The function of floating objects and guiding them downstream.

The solution that the present invention solves its technical problem is:

A liftable rigid floating retaining system applicable to the water inlet of a large-scale power station, comprising: at least one rigid long straight piece; a floating piece connected to the rigid long straight piece, which can make the rigid long straight piece float in a transverse state On the water surface; prevent the rigid long straight piece from drifting into the power station with the water flow, and it is fixed at the water inlet.

As a further improvement of the above technical solution, there are multiple floating parts, and there are multiple rigid long straight parts, and the multiple rigid long straight parts are sequentially connected to form a long strip, and the two adjacent rigid long straight parts The joints at the joints are the floating parts.

As a further improvement of the above technical solution, the rigid long straight piece is a stainless steel tube with a smooth surface.

As a further improvement of the above technical solution, the blocking assembly is several upright support piers distributed along a straight line and arranged at intervals.

As a further improvement of the above technical solution, the floating member is a floating ball.

As a further improvement of the above technical solution, the support pier is provided with a vertical guide groove, and the floating ball and/or the rigid straight piece is provided with a card seat embedded in the guide groove.

Or, as another improvement of the above technical solution, the floating member is a floating ring sleeved on the support pier.

No matter how it is improved, the lower part of the blocking assembly is provided with a low water level control pin.

The beneficial effects of the present invention are: the present invention adopts the rigid long straight part as the main body of the floating block, so that the floating block is not easy to break and is durable; the floating part can make the rigid long straight part float on the water surface at any time, ensuring that the floating block It can rise and fall with the water level, and can intercept floating objects in time; the blocking component can prevent rigid long straight parts from drifting into the power station with the water flow. The invention replaces the traditional flexible structure with a rigid structure, which is not easy to be washed away by water, and at the same time, due to its rigid boundary, it can well guide large-volume floating objects to the downstream of the power station, which is safe and reliable. The invention can be applied to the water inlet of a large power station to intercept floating objects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings that need to be used in the description of the embodiments. Apparently, the described drawings are only some embodiments of the present invention, not all embodiments, and those skilled in the art can obtain other designs and drawings based on these drawings without creative work.

Figure 1 is a schematic diagram of the top view of the traditional flexible drift arresting system installed behind the water inlet of the power station;

Fig. 2 is a front view structural schematic diagram of a traditional flexible drift arresting system;

Fig. 3 is a top view structural schematic diagram of the present invention arranged behind the water inlet of the power station;

Fig. 4 is a schematic diagram of the front structure of the present invention adopting the first embodiment;

Fig. 5 is a schematic diagram of the connection relationship between the support pier and the floating ball when the present invention adopts the first embodiment, which is a top view;

Fig. 6 is a front view structural schematic diagram of a second embodiment of the present invention;

Fig. 7 is a schematic diagram of the connection relationship between the support pier and the floating ring when the second embodiment of the present invention is adopted, and it is a top view.

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection/connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

Referring to Figures 3 to 5, a liftable rigid floating barrier system that can be used at the water inlet of a large power station includes: at least one rigid long straight piece 21; a floating piece 22, which is connected with the rigid long straight piece 21, and can The rigid straight piece 21 floats on the water surface in a transverse state; the blocking assembly that prevents the rigid straight piece 21 from drifting into the power station with the water flow is fixed at the water inlet.

Two specific implementations are given below, the first implementation is:

There are multiple floating parts 22, and the rigid long straight parts 21 also have multiple pieces. The multiple rigid long straight parts 21 are sequentially connected to form a strip shape, and the joints of the connecting parts of two adjacent rigid long straight parts 21 It is the floating part 22 described above. Theoretically, as long as the rigid long straight piece is long enough, only one piece can span and block the front of the entire water inlet, but considering the actual assembly, it is preferable to use a connection method of multi-section long pipes and floating pieces connected in series.

As a further preferred embodiment, the rigid straight piece 21 is a stainless steel tube with a smooth surface. The smooth appearance will not cause the entanglement of aquatic plants, and the operation and maintenance are very convenient. In addition, rigid long straight pieces such as square steel can also be considered.

As a further preferred embodiment, the blocking assembly is several upright supporting piers 23 distributed along a straight line and arranged at intervals.

As a further preferred embodiment, the floating member 22 is a floating ball.

As a further preferred embodiment, the support pier 23 is provided with a vertical guide groove, and the floating ball and/or the rigid straight piece 21 is provided with a card seat embedded in the guide groove.

The support pier 23 can ensure that the stainless steel pipe is not bent and deformed, and plays a role in strengthening the overall structure. The support pier 23 is made into a cylindrical shape with a diameter of generally 1m~2m, so as to reduce the water flow resistance. At the same time, if the diameter is selected, the width of the guide groove will not easily cause dirt to accumulate, get stuck on the deck, and cause the lifting function to fail.

Further as a preferred embodiment, a low water level control pin 24 is provided at the lower part of the blocking assembly. In order to prevent the floating row from falling into the river bed or the bottom of the river, a low water level control pin 24 is specially provided, so that when the water level is low, the low water level control pin 24 can support the rigid long straight piece 21 or the floating ball, and the water can flow from Passed below.

Referring to Figures 6 to 7, the second embodiment modifies the connection structure between the floating member 22 and the supporting pier 23, and the remaining parts are the same as the first embodiment. 23 on the floating ring. The floating ring also has buoyancy, and its annular structure can prevent the whole structure from detaching from the supporting pier 23 and deforming and falling apart.

In addition to the above-mentioned two ways to achieve liftability, it is also possible to make the support pier hollow, set out windows on both sides, the floating part is located in the hollow position, and the rigid long straight part is inserted into the floating part from the windows on both sides structural form.

The invention proves that the rigid liftable drift arresting system has a stable structure, convenient operation and maintenance, and can obviously save the operating cost of the power station through the fixed bed test of the physical model and the actual engineering operation verification.

The above is a specific description of the preferred embodiments of the present invention, but the invention is not limited to the described embodiments, those skilled in the art can also make various equivalent modifications or replacements without violating the spirit of the present invention , these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (5)

1. the Liftable type rigidity that can be used for large-scale power station water inlet blocks a drift system, it is characterized in that: comprising:

At least one long straight part (21) of rigidity;

Buoyant member (22), it connects with the long straight part (21) of rigidity, and the long straight part (21) of described rigidity can be made to float on the water surface in transverse state;

Prevent the long straight part (21) of rigidity from floating to the obstruction assembly within power station with current, it is fixed on water inlet;

Described buoyant member (22) has multiple, the long straight part (21) of described rigidity also has many, the many long straight parts (21) of rigidity connect formation strip in turn, the joint of the point of attachment of the long straight part (21) of adjacent two rigidity is described buoyant member (22), described obstruction assembly is that several distribute and spaced apart, upright support pier (23) along straight line, described support pier (23) is provided with vertical gathering sill, and buoyant member (22) and/or the long straight part (21) of rigidity are provided with the deck embedded in described gathering sill.

2. the Liftable type rigidity that can be used for large-scale power station water inlet according to claim 1 blocks drift system, it is characterized in that: the long straight part (21) of described rigidity is ganoid stainless steel tube.

3. the Liftable type rigidity that can be used for large-scale power station water inlet according to claim 1 blocks drift system, it is characterized in that: described buoyant member (22) is ball float.

4. the Liftable type rigidity that can be used for large-scale power station water inlet according to claim 1 blocks drift system, it is characterized in that: described buoyant member (22) is for being enclosed within the floating ring on support pier (23).

5. the Liftable type rigidity that can be used for large-scale power station water inlet according to claim 1 blocks drift system, it is characterized in that: the position on the lower stopping assembly is provided with low water stage and controls bolt (24).