Hydropower station pressure regulating structure

Abstract

The utility model discloses a hydropower station pressure regulating structure, which relates to the technical field of hydraulic engineering, is used for solving the problem that the existing hydropower station pressure regulating structure is not firm enough, and comprises a pressure regulating chamber, a main communicating pipe, a pressure pipeline, a first auxiliary communicating pipe and a second auxiliary communicating pipe, the left side of the pressure regulating chamber is fixedly connected with one end of a first metal rod, the other end of the first metal rod is fixedly connected with a concrete layer, the right side of the pressure regulating chamber is fixedly connected with one end of a second metal rod, the other end of the second metal rod is fixedly connected with the concrete layer, and a first fastening rod is fixedly connected between the first auxiliary communicating pipe and the first metal rod. According to the pressure regulating structure, the stability of the connection between the pressure regulating chamber and the pressure pipeline can be improved, so that the water attack resistance pressure is improved, and a guarantee is provided for the overall safety of the pressure regulating structure.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to a pressure regulating structure of a hydropower station. Background Art

[0002] During the operation of power generation, a hydropower station generally needs to trim the corresponding pressure pipes to intake water to meet the water requirements of the turbine generator set. Once the unit is shut down or the opening is suddenly reduced, a large water hammer pressure will be caused in the pressure pipe. Once the water hammer pressure exceeds the allowable pressure of the pressure pipe, it may cause damage to the pressure pipe and affect the normal and safe use of the hydropower station.

[0003] After searching, the Chinese patent authorization number CN202865809U discloses a pressure regulating structure of a hydropower station, which relates to the field of water conservancy and hydropower engineering technology, including a water diversion tunnel, and a pressure regulating chamber connected to the tunnel, wherein the pressure regulating chamber axis is arranged at an acute angle to the horizontal plane. Although the prior art reduces the actual excavation cross-sectional area of ​​the pressure regulating chamber, thereby improving the stability of the surrounding rock, and also reduces the difficulty of arranging the pressure regulating chamber in the case of multiple hydraulic units, most of the pressure regulating chambers in the prior art are directly connected to the pressure pipeline by connecting pipes, and the energy dissipation effect is general, the water hammer pressure cannot be consumed in time, and a large water hammer pressure will still affect the structural safety. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pressure regulating structure for a hydropower station, which solves the problem in the prior art proposed in the background technology that most of the pressure regulating chambers are directly connected to the pressure pipeline using a connecting pipe, the energy dissipation effect is general, the water hammer pressure cannot be dissipated in time, and a large water hammer pressure will still affect the structural safety.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a pressure regulating structure of a hydropower station, comprising a pressure regulating chamber, a main connecting pipe, a pressure pipeline, a first secondary connecting pipe and a second secondary connecting pipe, one end of the main connecting pipe is connected to the bottom of the pressure regulating chamber, and the other end is connected to the pressure pipeline, one end of the first secondary connecting pipe is connected to the left side of the pressure regulating chamber, the other end of the first secondary connecting pipe is connected to the main connecting pipe, one end of the second secondary connecting pipe is connected to the right side of the pressure regulating chamber, and the other end of the second secondary connecting pipe is connected to the main connecting pipe, a concrete layer is poured on the outside of the pressure pipeline, one end of the first metal rod is fixedly connected to the left side of the pressure regulating chamber, the other end of the first metal rod is fixedly connected to the concrete layer, one end of the second metal rod is fixedly connected to the right side of the pressure regulating chamber, the other end of the first metal rod is fixedly connected to the concrete layer, the first secondary connecting pipe is fixedly connected to the first metal rod, the other end of the second metal rod is fixedly connected to the concrete layer, a first fastening rod is fixedly connected between the first secondary connecting pipe and the first metal rod, and a second fastening rod is fixedly connected between the second secondary connecting pipe and the second metal rod.

[0006] Preferably, it further comprises a first shunt pipe, one end of which is connected to the first secondary connecting pipe, and the other end of which is connected to the pressure pipe.

[0007] Preferably, it further comprises a second shunt pipe, one end of which is connected to the second secondary connecting pipe, and the other end of which is connected to the pressure pipe.

[0008] Preferably, a first receiving hole is provided at the bottom of the pressure regulating chamber, and the main connecting pipe is connected with the inner cavity of the pressure regulating chamber through the first receiving hole.

[0009] Preferably, second receiving holes are respectively provided on the left and right sides of the pressure regulating chamber, and the first secondary connecting pipe and the second secondary connecting pipe are respectively connected with the inner cavity of the pressure regulating chamber through the second receiving holes on the left and right sides.

[0010] Preferably, a plurality of buffer plates are fixedly connected to inner walls on both sides of the pressure regulating chamber, and the plurality of buffer plates are arranged in a staggered manner.

[0011] The utility model provides a pressure regulating structure for a hydropower station, which has the following beneficial effects:

[0012] 1. A pressure regulating structure of a hydropower station, by pouring a concrete layer on the outer side of a pressure pipe, and fixing one end of a first metal rod to the left side of a pressure regulating chamber, the other end of the first metal rod to the concrete layer, one end of a second metal rod to the right side of the pressure regulating chamber, the other end of the second metal rod to the concrete layer, and fixing the first fastening rod between the first secondary connecting pipe and the first metal rod, and fixing the second fastening rod between the second secondary connecting pipe and the second metal rod; based on the connection and matching relationship among the concrete layer, the first metal rod, the second metal rod, the first fastening rod and the second fastening rod, on the one hand, the water hammer pressure resistance of the pressure regulating chamber and the pressure pipe is improved, and a better energy dissipation effect is achieved; on the other hand, the stability of the connection between the pressure regulating chamber, the first secondary connecting pipe, the second secondary connecting pipe, the main connecting pipe and the pressure pipe is improved, and the overall safety of the pressure regulating structure is guaranteed.

[0013] 2. By setting a first shunt pipe between the first secondary connecting pipe and the pressure pipe, and setting a second shunt pipe between the second secondary connecting pipe and the pressure pipe, on the one hand, the impact pressure of the water flow in the pressure regulating chamber on the first secondary connecting pipe, the main connecting pipe and the second secondary connecting pipe can be alleviated, so that the water hammer pressure can be consumed in time; on the other hand, the water flow in the pressure pipe can be further divided, thereby ensuring the overall stable operation of the pressure regulating structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall cross-sectional view of the utility model;

[0015] Figure 2 This is a schematic diagram of the concrete layer pouring structure of the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the structure of the first receiving hole and the second receiving hole.

[0017] In the figure, 1, pressure regulating chamber; 2, main connecting pipe; 3, pressure pipe; 4, first secondary connecting pipe; 5, second secondary connecting pipe; 6, concrete layer; 7, first metal rod; 8, first fastening rod; 9, second metal rod; 10, second fastening rod; 11, first shunt pipe; 12, second shunt pipe; 13, first receiving hole; 14, second receiving hole; 15, buffer plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0019] See also Figure 1-3 , the utility model embodiment provides a technical solution: a pressure regulating structure of a hydropower station, including a pressure regulating chamber 1, a main connecting pipe 2, a pressure pipeline 3, a first secondary connecting pipe 4 and a second secondary connecting pipe 5, one end of the main connecting pipe 2 is connected to the bottom of the pressure regulating chamber 1, and the other end of the main connecting pipe 2 is connected to the pressure pipeline 3, and then the water flow in the pressure regulating chamber 1 can be introduced into the pressure pipeline 3 through the main connecting pipe 2; one end of the first secondary connecting pipe 4 is connected to the left side of the pressure regulating chamber 1, the other end of the first secondary connecting pipe 4 is connected to the main connecting pipe 2, and one end of the second secondary connecting pipe 5 is connected to the pressure regulating chamber 1. The right side of the pressure regulating chamber 1 is connected, and the other end of the second secondary connecting pipe 5 is connected to the main connecting pipe 2; specifically, the water flow in the pressure regulating chamber 1 is divided into three paths and flows into the pressure pipe 3; wherein, the first path of water flows out from the pressure regulating chamber, flows into the pressure pipe through the main connecting pipe 2, the second path of water flows out from the pressure regulating chamber 1, merges into the main connecting pipe 2 through the first secondary connecting pipe 4 on the left side of the pressure regulating chamber 1, and then flows into the pressure pipe 3, and the third path of water flows out from the pressure regulating chamber 1, merges into the main connecting pipe 2 through the second secondary connecting pipe 5 on the right side of the pressure regulating chamber 1, and then flows into the pressure pipe 3.

[0020] More specifically, a concrete layer 6 is poured on the outside of the pressure pipe 3, and the outside of the pressure pipe 3 is tightly wrapped by the concrete layer 6; in order to improve the connection stability between the pressure regulating chamber 1, the main connecting pipe 2, and the pressure pipe 3; the pressure regulating chamber 1 also includes a first metal rod 7 and a second metal rod 9, wherein one end of the first metal rod 7 is fixedly connected to the left side of the pressure regulating chamber 1, and the other end of the first metal rod 7 is fixedly connected to the concrete layer 6, one end of the second metal rod 9 is fixedly connected to the right side of the pressure regulating chamber 1, and the other end of the second metal rod 9 is fixedly connected to the concrete layer 6; and in order to ensure that the first auxiliary connecting pipe 4, the second auxiliary connecting pipe 5 and the pressure regulating chamber 1 , the connection stability between the main connecting pipe 2, the first fastening rod 8 is fixedly connected between the first secondary connecting pipe 4 and the first metal rod 7, and the second fastening rod 10 is fixedly connected between the second secondary connecting pipe 5 and the second metal rod 9; wherein, based on the connection between the first metal rod 7, the second metal rod 9, the first fastening rod 8 and the second fastening rod 10, on the one hand, the connection stability between the pressure regulating chamber 1, the first secondary connecting pipe 4, the second secondary connecting pipe 5, the main connecting pipe 2 and the pressure pipe 3 can be improved, and on the other hand, the water hammer pressure resistance of the pressure regulating chamber 1 and the pressure pipe 3 is improved, which has a better energy dissipation effect and provides a guarantee for the overall safety of the pressure regulating structure.

[0021] Example 1

[0022] See attached Figure 1 In order to further alleviate the pressure of water flow impact, the water station pressure regulating structure also includes a first shunt pipe 11 and a second shunt pipe 12; wherein, one end of the first shunt pipe 11 is connected to the first auxiliary connecting pipe 4, and the other end of the first shunt pipe 11 is connected to the pressure pipe 3 through insertion; one end of the second shunt pipe 12 is connected to the second auxiliary connecting pipe 5, and the other end of the second shunt pipe 12 is connected to the pressure pipe 3 through insertion; then, after the second water flow flows out of the pressure regulating chamber 1, part of the water flow flows into the main connecting pipe 2 through the first auxiliary connecting pipe 4 on the left side of the pressure regulating chamber 1, and then flows into the pressure pipe 3, and part of the water flow flows into the pressure pipe 3 through the first shunt pipe 11. The flow pipe 11 is directly introduced into the pressure pipe 3; the third water flow flows out from the pressure regulating chamber 1, part of the water flow is merged into the main connecting pipe 2 through the second auxiliary connecting pipe 5 on the right side of the pressure regulating chamber 1, and then flows into the pressure pipe 3, and part of the water flow is directly introduced into the pressure pipe 3 through the second branch pipe 12; on the one hand, it can alleviate the impact pressure of the water flow in the pressure regulating chamber 1 on the first auxiliary connecting pipe 4, the main connecting pipe 2 and the second auxiliary connecting pipe 5, so that the water hammer pressure can be consumed in time, and on the other hand, it can further divide the pressure of the water flow in the pressure pipe 3, thereby ensuring the stable operation of the overall pressure regulating structure.

[0023] Example 2

[0024] According to the attached Figure 3As shown, in order to facilitate the connection and fixation of the first auxiliary connecting pipe 4, the second auxiliary connecting pipe 5 and the main connecting pipe 2 with the pressure regulating chamber 1, a first receiving hole 13 and two second receiving holes 14 are opened on the pressure regulating chamber 1, and the first receiving hole 13 is opened at the bottom of the pressure regulating chamber 1, and the two second receiving holes 14 are respectively opened on the left and right sides of the pressure regulating chamber 1, the end of the main connecting pipe 2 away from the pressure pipe 3 is connected to the interior of the pressure regulating chamber 1 through the first receiving hole 13, the end of the first auxiliary connecting pipe 4 away from the pressure pipe 3 is connected to the interior of the pressure regulating chamber 1 through the second receiving hole 14 on the left side of the pressure regulating chamber 1, and the end of the second auxiliary connecting pipe 5 away from the pressure pipe 3 is connected to the interior of the pressure regulating chamber 1 through the second receiving hole 14 on the right side of the pressure regulating chamber 1.

[0025] Example 3

[0026] See attached Figure 1 In order to further reduce the water flow impact inside the pressure regulating chamber 1, a plurality of buffer plates 15 are fixedly connected to the inner walls on both sides of the pressure regulating chamber 1, and the plurality of buffer plates 15 are arranged in a staggered manner, thereby forming a flow channel for reducing the water flow impact inside the pressure regulating chamber 1; specifically, the setting of the buffer plates 15 can effectively reduce the flow velocity of the water flowing into the pressure regulating chamber 1, thereby reducing the impact of the water flow, and then realizing wind pressure protection for the pressure regulating chamber 1.

[0027] Working principle: water flows into the pressure regulating chamber 1 from the outside, and acts on the buffer plates 15 staggered on the inner walls on both sides of the pressure regulating chamber 1, and then the water flows into the pressure pipe 3 in three ways; among them, the first water flow flows out of the pressure regulating chamber 1, flows into the pressure pipe through the main connecting pipe 2, the second water flow flows out of the pressure regulating chamber 1, merges into the main connecting pipe 2 through the first secondary connecting pipe 4 on the left side of the pressure regulating chamber 1, and then flows into the pressure pipe 3, the third water flow flows out of the pressure regulating chamber 1, merges into the main connecting pipe 2 through the second secondary connecting pipe 5 on the right side of the pressure regulating chamber 1, and then flows into the pressure pipe 3; and, after the second water flow flows out of the pressure regulating chamber 1, part of the water flow merges into the main connecting pipe through the first secondary connecting pipe 4 on the left side of the pressure regulating chamber 1 2, and then flows into the pressure pipe 3, and part of the water flow is directly introduced into the pressure pipe 3 through the first shunt pipe 11; the third water flow flows out of the pressure regulating chamber 1, and part of the water flow is merged into the main connecting pipe 2 through the second secondary connecting pipe 5 on the right side of the pressure regulating chamber 1, and then flows into the pressure pipe 3, and part of the water flow is directly introduced into the pressure pipe 3 through the second shunt pipe 12; in this process, the first metal rod 7 and the second metal rod 9 are used to firmly support the main connecting pipe 2 connected between the pressure regulating chamber 1 and the pressure pipe 3, the first fastening rod 8 firmly supports the first secondary connecting pipe 4 connected between the left side of the pressure regulating chamber 1 and the pressure pipe 3, and the second fastening rod 10 is used to firmly support the second secondary connecting pipe 5 connected between the right side of the pressure regulating chamber 1 and the pressure pipe 3.

[0028] The components of the utility model, 1, a pressure regulating chamber; 2, a main connecting pipe; 3, a pressure pipe; 4, a first secondary connecting pipe; 5, a second secondary connecting pipe; 6, a concrete layer; 7, a first metal rod; 8, a first fastening rod; 9, a second metal rod; 10, a second fastening rod; 11, a first shunt pipe; 12, a second shunt pipe; 13, a first receiving hole; 14, a second receiving hole; 15, a buffer plate, are all common standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0029] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pressure regulating structure of a hydropower station, comprising a pressure regulating chamber (1), a main connecting pipe (2), a pressure pipeline (3), a first secondary connecting pipe (4) and a second secondary connecting pipe (5), wherein one end of the main connecting pipe (2) is connected to the bottom of the pressure regulating chamber (1), and the other end is connected to the pressure pipeline (3), one end of the first secondary connecting pipe (4) is connected to the left side of the pressure regulating chamber (1), and the other end of the first secondary connecting pipe (4) is connected to the main connecting pipe (2), one end of the second secondary connecting pipe (5) is connected to the right side of the pressure regulating chamber (1), and the other end of the second secondary connecting pipe (5) is connected to the main connecting pipe (2), characterized in that: A concrete layer (6) is poured outside the pressure pipe (3); the left side of the pressure regulating chamber (1) is fixedly connected to one end of a first metal rod (7), and the other end of the first metal rod (7) is fixedly connected to the concrete layer (6); the right side of the pressure regulating chamber (1) is fixedly connected to one end of a second metal rod (9), and the other end of the second metal rod (9) is fixedly connected to the concrete layer (6); a first fastening rod (8) is fixedly connected between the first secondary connecting pipe (4) and the first metal rod (7), and a second fastening rod (10) is fixedly connected between the second secondary connecting pipe (5) and the second metal rod (9).

2. A hydropower station voltage regulating structure according to claim 1, characterized in that: It also comprises a first shunt pipe (11), one end of which is connected to the first secondary connecting pipe (4), and the other end of which is connected to the pressure pipe (3).

3. A hydropower station voltage regulating structure according to claim 1, characterized in that: It also comprises a second shunt pipe (12), one end of which is connected to the second secondary connecting pipe (5), and the other end of which is connected to the pressure pipe (3).

4. A hydropower station voltage regulating structure according to claim 1, characterized in that: A first receiving hole (13) is provided at the bottom of the pressure regulating chamber (1), and the main connecting pipe (2) is connected to the inner cavity of the pressure regulating chamber through the first receiving hole (13).

5. A hydropower station voltage regulating structure according to claim 1, characterized in that: The pressure regulating chamber (1) is provided with second receiving holes (14) on the left and right sides respectively, and the first secondary connecting pipe (4) and the second secondary connecting pipe (5) are connected to the inner cavity of the pressure regulating chamber through the second receiving holes (14) on the left and right sides respectively.

6. A hydropower station voltage regulating structure according to claim 1, characterized in that: A plurality of buffer plates (15) are fixedly connected to the inner walls on both sides of the pressure regulating chamber (1), and the plurality of buffer plates (15) are arranged in a staggered manner.

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