CN206157703U - Multistage orifice plate dissipation structure of lock water supply pipe - Google Patents

Abstract

The utility model relates to a multi-stage orifice plate energy dissipation structure of a ship lock water supply pipeline, which includes a water supply pipeline, an upper cushion section is installed inside the water supply pipeline, and a multi-stage orifice section is arranged at the lower end of the upper cushion section. The lower end of the multi-stage orifice section is provided with a water outlet section, the lower end of the water outlet section is provided with a lower cushion section, the upper cushion section, the multi-stage orifice section, the water outlet section and the lower cushion section The length ratio is 16:4:5:3. Applied in the field of energy dissipation of high water head water supply pipelines, the efficiency of energy dissipation is improved and the form of water flow is optimized.

Description

A multi-stage orifice plate energy dissipation structure for ship lock water supply pipeline

technical field

The utility model relates to a multi-stage orifice plate energy dissipation structure of a ship lock water supply pipeline, which belongs to the energy dissipation field of water conservancy and hydropower projects.

Background technique

In order to improve the energy dissipation efficiency of the high head water supply pipeline of the ship lock, in actual work, designers usually choose certain measures to increase the energy dissipation rate at the inlet, middle or outlet of the water flow. The traditional energy dissipation method for solving the water delivery system of a ship lock with a certain height is generally combined with several types of energy dissipation methods for flood discharge tunnels in hydraulic projects, and proposes an energy dissipation method for the water delivery system of a high head ship lock. It can be roughly divided into vortex type internal energy dissipation, shaft type internal energy dissipation, sudden expansion and contraction internal energy dissipation, and combined internal energy dissipation.

1. The vortex type internal energy dissipator and the vertical shaft type internal energy dissipator incorporate a large amount of air due to the need for energy dissipation, which not only affects the flow capacity of the flow tube, but also forms a complex water vapor secondary in the flow tube. Phase flow, if not properly resolved, will deteriorate the water flow conditions in the lock chamber and cause safety hazards to the berthing lock.

2. Although the sudden expansion and contraction internal energy dissipation device can better solve the problems of the discharge water flow rate and the safety of the berthing lock chamber, its own cavitation problem is serious, which affects the service life and even the safety of the water delivery system.

3. The combined internal energy dissipator is a combination type of internal energy dissipator. The research on it is in its infancy, and there are many problems to be perfected and summarized.

Among these four methods, the first three are the energy dissipation methods mainly adopted by the high-head water supply pipelines of ship locks, and each has its own advantages and disadvantages. Therefore, the utility model proposes a multi-stage orifice plate energy dissipation structure of the ship lock water supply pipeline, which overcomes the singleness and limitation of the energy dissipation mode of the traditional ship lock water delivery system, and improves the energy dissipation form of the existing ship lock high head water supply pipeline. Insufficient, the energy dissipation efficiency is greatly improved, and the flow state of the water flow is optimized, thereby eliminating the erosion damage of the structure at the bottom of the lock chamber and the vibration of the gate caused by the large fluctuation of the water surface in the lock chamber.

Utility model content

The purpose of the utility model is to provide a multi-stage orifice plate energy dissipation structure of a ship lock water supply pipeline, which is applied to the energy dissipation field of a high water head water supply pipeline, improves the energy dissipation efficiency, and optimizes the water flow form.

In order to solve the above technical problems, the utility model proposes the following technical solutions: a ship lock water supply pipeline multi-stage orifice plate energy dissipation structure, which includes a water supply pipeline, an upper cushion section is installed inside the water supply pipeline, and the upper cushion section The lower end of the multi-stage orifice section is provided with a water outlet section, the lower end of the water outlet section is provided with a lower cushion section, the upper cushion section, the multi-stage orifice plate The length ratio of the section, outlet section and lower cushion section is 16:4:5:3.

The multi-level orifice section is composed of three energy-dissipating orifice plates with the same thickness. The number and opening ratio of the first energy-dissipating orifice plate are the same Different; the opening number and opening ratio of the second energy dissipation orifice and the third energy dissipation orifice are the same, and the hole position distribution is misplaced; the distance between the three energy dissipation orifices is equal to the water flow recovery length 3 to 4.5 times.

A duck tongue plate with an inclination angle of 40 degrees to the horizontal plane inside the pipe is installed at two water flow recovery lengths from the third energy dissipation orifice on the water outlet section. The plates have the same diameter and half the thickness of the energy-dissipating orifice plate.

The same steel plate material is used for the multi-stage energy dissipation orifice plate and the duck tongue plate.

The lower cushion section directly extends into the lock chamber water.

When the water supply pipeline is installed, the cushion is flat, and several rubber rings are wrapped outside the water supply pipeline.

The utility model has the following beneficial effects:

The strong turbulence generated by the sudden contraction and expansion of the water flow through the orifice plate orifice is used to kill the huge water flow energy, and most of the kinetic energy of the kill is converted into heat energy and goes away with the water flow; the multi-stage orifice plate energy dissipation can be used. Make the water flow shrink and expand several times to increase the energy dissipation effect, and within a certain range, it can solve the water flow with large drop and fast downflow velocity; the water flow can be concentrated into the water cushion through the duck tongue plate set at the water outlet section area, which can solve the dispersion of water injection flow, so that the water flow turbulence after the sudden expansion downstream of the orifices at all levels can be alleviated to a certain extent, and the water flow swing can be properly controlled; while the bottom water cushion section extends into the water body of the sluice chamber, eliminating the initial water flow. In the first stage, the scouring damage of the bottom structure of the lock chamber may be caused, and in the later stage, the water surface of the lock chamber may fluctuate greatly, resulting in the vibration of the gate; compared with the traditional energy dissipation method, while increasing the energy dissipation effect, the overcurrent of the lock chamber is not reduced ability.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the main sectional view of the utility model.

Fig. 2 is a front view of the first energy-dissipating orifice plate of the present invention.

Fig. 3 is an A-A sectional view of the first energy dissipation orifice in Fig. 2 of the present invention.

Fig. 4 is a front view of the second energy-dissipating orifice plate of the present invention.

Fig. 5 is a B-B sectional view of the second energy-dissipating orifice plate in Fig. 2 of the present utility model.

In the figure: upper cushion section 1, multi-stage orifice plate section 2, water outlet section 3, lower cushion section 4, duck tongue plate 5, first energy dissipation orifice plate 201, second energy dissipation orifice plate 202, The third energy-dissipating orifice plate 203 .

detailed description

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

Example 1:

As shown in Figure 1-5, a multi-stage orifice plate energy dissipation structure for a ship lock water supply pipeline, which includes a water supply pipeline, an upper cushion section 1 is installed inside the water supply pipeline, and the lower end of the upper cushion section 1 is provided with multiple stages The orifice section 2, the lower end of the multi-stage orifice section 2 is provided with a water outlet section 3, the lower end of the water outlet section 3 is provided with a lower cushion section 4, the upper cushion section 1, the multi-stage orifice plate The length ratio of section 2, water outlet section 3 and lower cushion section 4 is 16:4:5:3.

Further, the multi-level orifice section 2 is composed of three energy-dissipating orifice plates with the same thickness. The number and opening ratio of the first energy-dissipating orifice plate 201 are the same as those of the second energy-dissipating orifice plate 202 and the second energy-dissipating orifice plate 201. The three energy-dissipating orifice plates 203 are different; the number of openings and opening ratio of the second energy-dissipating orifice plate 202 and the third energy-dissipating orifice plate 203 are the same, and the hole position distribution is misplaced; the three energy-dissipating orifice plates The distance between them is 3 to 4.5 times of the recovery length of the water flow.

Further, the water outlet section 3 is installed at two water flow restoration lengths from the third energy dissipation orifice 203 with a duck tongue plate 5 at an angle of 40 degrees to the horizontal plane inside the pipe, and the length and width ratio of the duck tongue plate 5 is 5:3 , and the length is the same as the diameter of the energy dissipation orifice, and the thickness is half of the energy dissipation orifice.

Further, the same steel plate material is used for the multi-stage energy dissipation orifice plate and the canard plate 5 .

Further, the lower cushion section 4 directly extends into the water in the sluice chamber.

Further, when the water supply pipeline is installed, the cushion is flat, and several rubber rings are wrapped around the water supply pipeline.

Example 2:

A water supply pipeline using multi-stage orifice plates for energy dissipation in a ship lock, comprising an upper cushion section, a multi-stage orifice plate section, a water outlet section and a lower cushion section, an upper cushion section, a multi-stage orifice plate section, a water outlet section and The length ratio of the lower cushion section is 16:4:5:3; the distance between the orifice plates is three times the water flow recovery length, the thickness of the orifice plate is determined according to the height of the water head and the flow rate of the water flow, and the diameter of the orifice plate is 1000mm; the duck tongue The ratio of plate length to width is 5:3, and the length is the same as the diameter of the energy dissipation orifice plate, and the thickness is half of the energy dissipation orifice plate; the energy dissipation orifice plate and the duck tongue plate are made of cold-rolled steel plates.

Example 3:

A water supply pipeline using multi-stage orifice plates for energy dissipation in a ship lock, comprising an upper cushion section, a multi-stage orifice plate section, a water outlet section and a lower cushion section, an upper cushion section, a multi-stage orifice plate section, a water outlet section and The length ratio of the lower cushion section is 16:4:5:3; the distance between the orifice plates is 3.5 times the recovery length of the water flow, and the thickness of the orifice plate is 30mm. The diameter is 1200mm; the length and width ratio of the duck tongue plate is 5:3, and the length is the same as the diameter of the energy dissipation orifice plate, and the thickness is half of the energy dissipation orifice plate; the energy dissipation orifice plate and the duck tongue plate are made of galvanized steel plate.

Example 4:

A water supply pipeline using multi-stage orifice plates for energy dissipation in a ship lock, comprising an upper cushion section, a multi-stage orifice plate section, a water outlet section and a lower cushion section, an upper cushion section, a multi-stage orifice plate section, a water outlet section and The length ratio of the lower cushion section is 16:4:5:3; the distance between the orifice plates is 4 times the water flow recovery length, the thickness of the orifice plate is determined according to the water head height and the water flow velocity, and the diameter of the orifice plate is 1300mm; The ratio of length to width is 5:3, and the length is the same as the diameter of the energy dissipation orifice, and the thickness is half of the energy dissipation orifice; the energy dissipation orifice and the duck tongue plate are made of killed steel plates.

Example 5:

A water supply pipeline using multi-stage orifice plates for energy dissipation in a ship lock, comprising an upper cushion section, a multi-stage orifice plate section, a water outlet section and a lower cushion section, an upper cushion section, a multi-stage orifice plate section, a water outlet section and The length ratio of the lower cushion section is 16:4:5:3; the distance between the orifice plates is 4.5 times the recovery length of the water flow, the thickness of the orifice plate is determined according to the height of the water head and the flow rate of the water flow, and the diameter of the orifice plate is 1500mm; the duck tongue The ratio of plate length to width is 5:3, and the length is the same as the diameter of the energy dissipation orifice, and the thickness is half of the energy dissipation orifice; the energy dissipation orifice and the duck tongue plate are made of high-quality carbon steel plates.

Through the above description, those skilled in the art can make various changes and modifications without departing from the technical idea of the utility model, all of which are within the protection scope of the utility model. Unfinished matters of the utility model belong to the common knowledge of those skilled in the art.

Claims (5)

1. A ship lock water supply pipeline multi-stage orifice energy dissipation structure, characterized in that it includes a water supply pipeline, an upper cushion section (1) is installed inside the water supply pipeline, and the lower end of the upper cushion section (1) A multi-stage orifice section (2) is provided, the lower end of the multi-stage orifice section (2) is provided with a water outlet section (3), and the lower end of the water outlet section (3) is provided with a lower cushion section (4 ), the length ratio of the upper cushion section (1), the multi-stage orifice section (2), the water outlet section (3) and the lower cushion section (4) is 16:4:5:3; The multi-stage orifice section (2) is composed of three energy-dissipating orifice plates with the same thickness. The number and opening ratio of the first energy-dissipating orifice plate (201) are the same ) is different from the third energy dissipation orifice (203); the number and opening ratio of the second energy dissipation orifice (202) and the third energy dissipation orifice (203) are the same, and the hole distribution Dislocation layout; the distance between the three energy dissipation orifice plates is 3 to 4.5 times the recovery length of the water flow. 2. A multi-stage orifice plate energy dissipation structure for a ship lock water supply pipeline according to claim 1, characterized in that: the water outlet section (3) is two water flow restoration lengths away from the third energy dissipation orifice plate (203) Install the duck tongue plate (5) with an inclination angle of 40 degrees to the horizontal plane inside the pipe. The length and width ratio of the duck tongue plate (5) is 5:3, and the length is the same as the diameter of the energy dissipation orifice plate, and the thickness is half of the energy dissipation orifice plate . 3. The multi-stage orifice plate energy dissipation structure of the ship lock water supply pipeline according to claim 2, characterized in that: the multi-stage energy dissipation orifice plate and the duck tongue plate (5) are both made of the same steel plate material. 4. The multi-stage orifice plate energy dissipation structure of the ship lock water supply pipeline according to claim 1, characterized in that: the lower cushion section (4) directly extends into the lock chamber water. 5. A multi-stage orifice plate energy dissipation structure for a ship lock water supply pipeline according to claim 1, characterized in that: when the water supply pipeline is installed, the mat is flat, and several rubber rings are wrapped around the water supply pipeline.