Water retaining wall for changing laminar flow of water inlet of hydropower station

Abstract

The utility model provides a retention wall for changing the laminar flow of a water inlet of a hydropower station, which comprises a retention wall body and an anti-impact assembly, the upper left side of the retention wall body is provided with the anti-impact assembly for preventing the flapping impact of water waves, and the retention wall body comprises a main wall body, an extension part, a slope part I, a slope part II and a wall top part. Compared with the prior art, the anti-impact water retaining wall has the advantages that the anti-impact assembly is arranged, impact and erosion of water waves to the water retaining wall body can be effectively resisted, the service life of the water retaining wall body can be prolonged, the water retaining wall body is matched with the first slope part and the second slope part on the water retaining wall body, and the service life of the water retaining wall body is prolonged. The elevation difference between the top end elevation of the wall top of the retention wall body and the upstream water surface is always kept lower than 0.5 m, that is, it is guaranteed that water entering the power station from the upstream is surface layer oxygen-enriched water all the time, and the oxygen content in downstream water can be increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of water retaining walls, in particular to a water retaining wall for changing the laminar flow of a water inlet of a hydropower station. Background Art

[0002] Dissolved oxygen is an important indicator of river water quality and ecosystem health. Dissolved oxygen can reflect the metabolism in aquatic ecosystems, that is, the temporary balance between atmospheric dissolution and the oxygen release process of plant photosynthesis and the oxygen consumption process of biological respiration. Drastic changes in dissolved oxygen reflect changes in the structure and function of aquatic ecosystems. Lower dissolved oxygen concentrations not only affect the distribution and growth of fish and invertebrates, but also affect the redox potential of sediments, thereby affecting the dissolution and balance of phosphorus and other inorganic nutrients and toxic trace metals.

[0003] Factors that directly affect river water quality and ecological processes mainly include pollutant input and changes in hydrological conditions. River dam construction can also significantly affect the dissolved oxygen concentration in the water body. For example, after the Three Gorges Dam was filled with water, the dissolved oxygen concentration in the upstream section generally decreased. Water storage will cause the flow rate in the upstream reservoir area to slow down and the river's reoxygenation capacity to decrease. At the same time, the residence time of pollutants in the water body will increase, increasing the consumption of dissolved oxygen.

[0004] The surface dissolved oxygen in the upstream and downstream of the Jiantan Power Station dam on the Dongjiang River is 5.0 mg / L and 4.1 mg / L respectively, with a difference of 0.9 mg / L, while the surface and bottom dissolved oxygen concentrations in front of the dam are 5.0 mg / L and 3.3 mg / L respectively, with a difference of 1.7 mg / L. Therefore, the operation mode of the Jiantan Power Station on the Dongjiang River (low-oxygen water from the bottom enters the power station) causes a loss of 1.7 mg / L of dissolved oxygen downstream. After aeration by the power station, the dissolved oxygen increases (1.7-0.9=0.8 mg / L), but overall the operation of the power station has a side effect on the dissolved oxygen in the Dongjiang River, that is, a loss of 0.9 mg / L. This type of river-type power station basically takes in water from the bottom, and there is a risk of reducing the dissolved oxygen in the downstream river section, which is universal. Therefore, we hope to design a retaining wall with a new structure to solve this problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a retaining wall for changing the laminar flow at the water inlet of a hydropower station, so as to solve the problems raised in the above-mentioned background technology.

[0006] The utility model is realized by the following technical scheme: a water retaining wall for changing the laminar flow of the water inlet of a hydropower station, comprising: a water retaining wall body, an anti-impact component, an anti-impact component for preventing water waves from hitting and impacting is arranged on the upper left side of the water retaining wall body, and the water retaining wall body comprises a main wall body, an extension part, a first slope part, a second slope part and a wall top;

[0007] The left side of the main wall is integrally provided with an extension portion, the upper right side of the main wall is integrally provided with a slope portion 1, the upper right side of the main wall is integrally provided with a slope portion 2, the slope portion 1 is located on the upper left side of the slope portion 2, and the upper end of the main wall is integrally provided with a wall top;

[0008] The anti-impact component includes a lower connecting portion, an arc portion and an upper connecting portion. The arc portion is arranged on the right side of the lower connecting portion, and the upper connecting portion is integrally arranged on the upper side of the right end of the arc portion.

[0009] As a preferred embodiment, the upper side of the extension part is depressed downward to form a groove, and a protrusion is integrally provided on the upper side of the left end of the extension part. The setting of the protrusion and the slot can improve the use strength of the entire anti-impact component.

[0010] As a preferred embodiment, the lower end of the lower connecting part is cast inside the groove, and a slot is provided on the lower side of the left end of the lower connecting part. The size and structure of the slot match the size and structure of the raised part. The setting of the anti-impact component can protect the side of the retaining wall body that stores water and reduce the erosion of the retaining wall body by water waves.

[0011] As a preferred embodiment, the left end of the lower connecting portion is flush with the left end of the extending portion, the arc portion is arranged at a right angle near the upper side between the extending portion and the main wall, and the overall width of the cross section of the upper connecting portion gradually increases from top to bottom.

[0012] As a preferred embodiment, the upper end of the slope portion 1 is smoothly connected to the lower side of the right end of the wall top through an arc connecting portion 1, and the slope portion 1 is set at a downward angle of 30 degrees with the left side higher and the right side lower.

[0013] As a preferred embodiment, an arc connection part 2 is provided at the right end of the slope part 1, and an arc connection part 3 is provided between the lower side of the right end of the slope part 1 and the upper side of the left end of the slope part 2. The slope part 2 is set at a downward angle of 15 degrees with the left side higher and the right side lower.

[0014] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: by setting the anti-impact component, in actual use, the lower end of the lower connecting part is set inside the groove, and the left end of the lower connecting part is provided with a slot to match the protruding part, so that the entire anti-impact component can have a strong use strength when under pressure, and the setting of the arc part makes the entire anti-impact component itself have a strong impact resistance. With the anti-impact component made of impact-resistant materials, it can effectively resist the impact and erosion of water waves on the retaining wall body, which helps to improve the service life of the retaining wall body;

[0015] By setting up a retaining wall body, in conjunction with the slope part one and the slope part two thereon, the retaining wall body can release the water rich in dissolved oxygen in the upper layer of the water storage into the power station. When this part of water passes through the slope part one, it undergoes the first natural impact with dissolved oxygen under the action of the water level difference. When passing through the slope part two, it undergoes the second natural impact with dissolved oxygen under the action of the water level difference, and finally flows to the power station through the slope part two. If the elevation of the water inlet of the power station is lower than the elevation of the bottom of the upstream river, the bottom of the water retaining wall body will be level with the bottom of the river (to prevent low-oxygen water from the bottom from entering); if the elevation of the water inlet of the power station is higher than the elevation of the bottom of the upstream river, the elevation of the bottom of the water retaining wall body will be the lowest elevation below the water inlet.

[0016] The top elevation of the water retaining wall body always maintains an elevation difference of less than 0.5m from the upstream water surface, that is, to ensure that the water entering the power station from the upstream is always surface oxygen-rich water. If the water level upstream of the power station remains unchanged for a long time, the water retaining wall body is built with a concrete structure (if the upstream water level changes with the seasons, the top of the wall is replaced with a stacked beam, and the total height of the stacked beam is equal to the maximum water level difference, that is, the water level fluctuation range. The upper connecting part on the left side of the part of the wall top replaced by the stacked beam is segmented with the stacked beam separation spacing, and the corresponding stacked beam structure is matched to ensure normal protection of the entire water retaining wall body), which helps to increase the oxygen content in the downstream water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the structure of a riverbed hydropower station in the prior art.

[0019] Figure 2 The utility model is a schematic diagram of the overall structure of a water retaining wall for changing the laminar flow at the water inlet of a hydropower station.

[0020] Figure 3 for Figure 2 A is an enlarged schematic diagram.

[0021] Figure 4 The utility model is a schematic diagram of a retaining wall body structure of a retaining wall for changing the laminar flow at the water inlet of a hydropower station.

[0022] Figure 5 It is a schematic diagram of the anti-impact component structure of a water retaining wall for changing the laminar flow at the water inlet of a hydropower station according to the utility model.

[0023] In the figure, 100 - water retaining wall body, 110 - main wall, 120 - extension part, 121 - groove, 122 - raised part, 130 - slope part 2, 131 - arc connection part 3, 140 - slope part 1, 141 - arc connection part 1, 142 - arc connection part 2, 150 - wall top;

[0024] 200 - impact-proof component, 210 - lower connecting portion, 211 - slot, 220 - upper connecting portion, 230 - arc portion. DETAILED DESCRIPTION

[0025] 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 of 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.

[0026] See also Figures 1 to 5 The utility model provides a technical solution: a water retaining wall for changing the laminar flow of the water inlet of a hydropower station, comprising: a water retaining wall body 100, an anti-impact component 200, an anti-impact component 200 for preventing water waves from hitting and impacting is arranged on the upper left side of the water retaining wall body 100, and the water retaining wall body 100 comprises a main wall 110, an extension part 120, a slope part 140, a slope part 2 130 and a wall top 150;

[0027] An extension part 120 is integrally provided on the left side of the main wall 110, a slope part 140 is integrally provided on the right side of the upper end of the main wall 110, a slope part 2 130 is integrally provided on the right side of the upper end of the main wall 110, the slope part 140 is located on the upper left side of the slope part 2 130, and a wall top 150 is integrally provided on the upper end of the main wall 110;

[0028] The impact protection assembly 200 includes a lower connecting portion 210 , an arc portion 230 and an upper connecting portion 220 . The arc portion 230 is disposed on the right side of the lower connecting portion 210 , and the upper connecting portion 220 is integrally disposed on the upper side of the right end of the arc portion 230 .

[0029] See also Figure 2 , Figure 5 The upper side of the extension part 120 is recessed downward to form a groove 121, and a protrusion 122 is integrally provided on the upper side of the left end of the extension part 120. The setting of the protrusion 122 and the slot 211 can improve the use strength of the entire anti-impact assembly 200.

[0030] The lower end of the lower connecting part 210 is cast inside the groove 121, and a slot 211 is provided on the lower side of the left end of the lower connecting part 210. The size and structure of the slot 211 match the size and structure of the raised part 122. The setting of the anti-impact component 200 can protect the side of the water retaining wall body 100 that stores water, thereby reducing the erosion of the water retaining wall body 100 by water waves.

[0031] As the first embodiment of the utility model, in actual use, the lower end of the lower connecting part 210 is arranged inside the groove 121, and the left end of the lower connecting part 210 is provided with a slot 211 that matches the protrusion 122, so that the entire anti-impact component 200 can have a strong use strength when under pressure, and the setting of the arc portion 230 makes the entire anti-impact component 200 itself have a strong impact resistance. The anti-impact component 200 made of impact-resistant material can effectively resist the impact and erosion of water waves on the retaining wall body 100, which helps to improve the service life of the retaining wall body 100.

[0032] See also Figures 2 to 5 The left end of the lower connecting portion 210 is flush with the left end of the extending portion 120, the arc portion 230 is arranged at a right angle near the upper side between the extending portion 120 and the main wall 110, and the overall width of the cross section of the upper connecting portion 220 gradually increases from top to bottom.

[0033] The upper end of the slope part 140 is smoothly connected to the lower side of the right end of the wall top 150 through an arc connecting part 141, and the slope part 140 is set at a downward angle of 30 degrees with the left side higher and the right side lower.

[0034] A second arc connection part 142 is provided at the right end of the first slope part 140, and a third arc connection part 131 is provided between the lower side of the right end of the first slope part 140 and the upper side of the left end of the second slope part 130. The second slope part 130 is provided at a downward angle of 15 degrees with the left side higher and the right side lower.

[0035] As the second embodiment of the utility model, based on the above-mentioned first embodiment, by setting a retaining wall body 100, in conjunction with the slope part 140 and the slope part 2 130 thereon, in actual use, the retaining wall body 100 can put the water rich in dissolved oxygen in the upper layer of the water storage into the power station. When this part of water passes through the slope part 140, it undergoes the first natural impact with dissolved oxygen under the action of the water level difference. When passing through the slope part 2 130, it undergoes the second natural impact with dissolved oxygen under the action of the water level difference, and finally flows to the power station through the slope part 2 130. If the elevation of the water inlet of the power station is lower than the elevation of the bottom of the upstream river, the bottom of the water retaining wall body 100 is level with the bottom of the river (to prevent low-oxygen water from the bottom from entering); if the elevation of the water inlet of the power station is higher than the elevation of the bottom of the upstream river, the elevation of the bottom of the water retaining wall body 100 is the lowest elevation below the water inlet.

[0036] The top elevation of the wall top 150 of the water retaining wall body 100 always maintains an elevation difference of less than 0.5m from the upstream water surface, which ensures that the water entering the power station from the upstream is always surface oxygen-rich water. If the water level upstream of the power station remains unchanged for a long time, the water retaining wall body 100 is built with a concrete structure (if the upstream water level changes with the seasons, the wall top 150 is replaced with a stacked beam, and the total height of the stacked beam is equal to the maximum water level difference, that is, the water level fluctuation range. The upper connecting part 220 on the left side of the part of the wall top 150 replaced by the stacked beam is segmented with the stacked beam spacing interval, and the corresponding matching stacked beam structure is sufficient to ensure normal protection of the entire water retaining wall body 100), which helps to increase the oxygen content in the downstream water.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A retaining wall for changing the laminar flow of a water inlet of a hydropower station, comprising: A water retaining wall body (100) and an anti-impact assembly (200), characterized in that an anti-impact assembly (200) for preventing water waves from hitting and impacting is arranged on the upper left side of the water retaining wall body (100), and the water retaining wall body (100) comprises a main wall body (110), an extension part (120), a first slope part (140), a second slope part (130) and a wall top (150); An extension portion (120) is integrally provided on the left side of the main wall (110), a slope portion 1 (140) is integrally provided on the right side of the upper end of the main wall (110), a slope portion 2 (130) is integrally provided on the right side of the upper end of the main wall (110), the slope portion 1 (140) is located on the upper left side of the slope portion 2 (130), and a wall top portion (150) is integrally provided on the upper end of the main wall (110); The impact protection component (200) comprises a lower connecting portion (210), an arc portion (230) and an upper connecting portion (220), wherein the arc portion (230) is arranged on the right side of the lower connecting portion (210), and the upper connecting portion (220) is integrally arranged on the upper side of the right end of the arc portion (230).

2. A retaining wall for changing the laminar flow of a water inlet of a hydropower station as claimed in claim 1, characterized in that: The upper side of the extension portion (120) is recessed downward to form a groove (121), and a protrusion (122) is integrally provided on the upper side of the left end of the extension portion (120).

3. A retaining wall for changing the laminar flow of a water inlet of a hydropower station as claimed in claim 2, characterized in that: The lower end of the lower connecting portion (210) is cast inside the groove (121), and a clamping groove (211) is provided on the lower side of the left end of the lower connecting portion (210), and the size and structure of the clamping groove (211) match the size and structure of the protruding portion (122).

4. A retaining wall for changing the laminar flow of a water inlet of a hydropower station as claimed in claim 3, characterized in that: The left end of the lower connecting portion (210) is flush with the left end of the extending portion (120), the arc portion (230) is arranged at a right angle close to the upper side between the extending portion (120) and the main wall (110), and the overall width of the cross section of the upper connecting portion (220) gradually increases from top to bottom.

5. A retaining wall for changing the laminar flow of a water inlet of a hydropower station as claimed in claim 4, characterized in that: The upper end of the slope part 1 (140) is smoothly connected to the lower side of the right end of the wall top (150) through an arc connecting part 1 (141), and the slope part 1 (140) is set at a downward inclination of 30 degrees with the left side higher and the right side lower.

6. A retaining wall for changing the laminar flow of a water inlet of a hydropower station as claimed in claim 5, characterized in that: The right end of the slope part 1 (140) is provided with an arc connecting part 2 (142), and an arc connecting part 3 (131) is provided between the lower side of the right end of the slope part 1 (140) and the upper side of the left end of the slope part 2 (130). The slope part 2 (130) is arranged at a downward inclination of 15 degrees with the left side higher than the right side.

Images