CN217601621U - Drop-flow shaft with swirl split-flow inlet structure - Google Patents

Abstract

The utility model provides a falling flow vertical shaft with a spiral-flow type flow-dividing water inlet structure, which comprises a vertical shaft and a flow dividing device arranged in the vertical shaft; an air inlet pipe and a water inlet pipe are arranged on one side of the vertical shaft, and the bottom of the vertical shaft is vertically connected with a horizontal drainage pipe; the flow dividing device comprises a first partition plate, a second partition plate and a third partition plate which are equal in height, the surface of the first partition plate is a plane, and the surfaces of the second partition plate and the third partition plate are arc-shaped curved surfaces; the first end surfaces of the first and second partition plates and the first end surface of the third partition plate are connected in pairs, a first intersection line is formed at the joint, and the second and third partition plates are symmetrically distributed along the first partition plate; the second end surface of the first clapboard is connected with the inner wall of the vertical shaft, a second intersecting line is formed at the joint, and the midpoint of the second intersecting line is positioned on the extension line of the horizontal center line of the water inlet pipe; the second end surfaces of the second and third partition boards are connected with the inner wall of the vertical shaft. The utility model discloses a shaft can guarantee to have good ventilation condition in the shaft, adjusts shaft internal gas pressure to eliminate the kinetic energy of rivers.

Description

Poor stream well with a spin -type diversion of water inlet structure

technical field

The utility model relates to the technical field of municipal engineering, in particular to a drop-flow vertical shaft with a swirling flow split water inlet structure.

Background technique

Drop-flow shafts are widely used in urban drainage systems and are one of the most common hydraulic structures. They have the characteristics of simple design, convenient construction, safety and reliability. With the frequent occurrence of extreme weather, urban waterlogging has become more and more serious, and then the deep drainage system has been widely used. As an important part of the deep drainage system, the shaft undertakes the water flow transition between the drainage pipes at different altitudes. The height of the common deep shaft is about 30-60m. Gas can easily cause excessive pressure in shafts and drainage pipes, and in severe cases, well jet explosion and other phenomena will be found.

As the main place of air roll suction, there are many ways to suck gas. There are several ways: dragging the gas down the water down the water, the water tongue drop roll, the water flows to the bottom of the well Wait. When the water flow falls under the action of gravity, because the existence of the shear force will eventually be separated and crushed into a large amount of water droplets after a distance of the fall. When the flow in the water inlet pipe is large, the water flow will hit the wall on the opposite side to form a large tongue. The formation of the water tongue will hinder the circulation of the gas. The air pressure distribution is extremely unstable.

Utility model content

The purpose of the utility model is to provide a drop-flow shaft with a swirling flow split water inlet structure, which can ensure good ventilation conditions in the shaft, aiming at the problem of blocking the gas circulation passage due to the occurrence of water tongues in the shaft. Adjust the air pressure in the shaft and eliminate the kinetic energy of the water flow.

For achieving the above object, the technical scheme adopted in the present invention is as follows:

A drop-flow vertical shaft with a swirling flow split water inlet structure, comprising a vertical shaft and a flow split device arranged in the vertical shaft;

One side of the vertical shaft is provided with an air inlet pipe and a water inlet pipe, the air inlet pipe is arranged above the water inlet pipe, and the bottom of the vertical shaft is vertically connected with the drainage horizontal pipe to form a passage;

The flow dividing device includes a first partition plate, a second partition plate and a third partition plate with equal heights, the surface of the first partition plate is a plane, and the surfaces of the second partition plate and the third partition plate are both arc-shaped curved surfaces. ;

The first end face of the first separator, the first end face of the second separator and the first end face of the third separator are connected in pairs, and a first intersection line is formed at the connection, and the second separator and the third separator are connected in pairs. The partitions are symmetrically distributed along the first partition;

The second ends of the first partition are connected to the inner wall of the well, and the second phase line is formed at the connection. Among them, the middle point of the second phase line is located on the extension line of the horizontal center line of the water pipe, and the first is the first, and the first is the first, and the first is the first, and the first is the first, and the first is the first, and the first is the first, and the first is the first. One -screen divides the water inlet and vertical wells into the first water inlet and the second water entrance;

The second end surface of the second partition plate and the second end surface of the third partition plate are connected with the inner wall of the shaft;

The first baffle, the second baffle and the third baffle divide the inner cavity of the shaft into a first cavity, a second cavity and a third cavity, and the first cavity and the second cavity are overflow areas , and the third cavity is the gas passage area.

Preferably, the first line of intersection coincides with the vertical centerline of the shaft.

Preferably, the structures of the second separator and the third separator are the same.

Preferably, in the arc surface formed by the cross section of the second partition plate, the radius of the circle where the arc surface is located is 1/2 of the diameter of the shaft, and the central angle is 30°˜60°.

Preferably, the thickness of the second separator is 1/2 of the thickness of the first separator.

Preferably, the first partition is a rectangular board. Among them, the width is 1/2 of the diameter of the vertical well, the height is 2 to 3 times the diameter of the water inlet pipe, and the thickness is 1/8 to 1/10 of the diameter of the water pipe.

Preferably, the diameter of the water inlet pipe is 1/2 of the diameter of the vertical shaft, and the length of the water inlet pipe is 10-12 times the diameter of the water inlet pipe.

Preferably, the diameter of the air inlet pipe is 1/4 of the diameter of the vertical shaft, and the length of the air inlet pipe is 2-4 times the diameter of the air inlet pipe.

Preferably, the distance between the air inlet pipe and the top of the shaft is 1/45-2/45 of the length of the shaft, and the distance between the inlet pipe and the top of the shaft is 1/9-2/9 of the length of the shaft.

Preferably, the diameter of the drainage tube is the same as the diameter of the vertical well.

The beneficial effects of the present utility model are:

1. The diligant -streaming well with a spin -flow diversion structure with a diligent new type is equipped with a diversion device. After the water flows into the vertical well, hit the second partition and the third partition, and forms a water tongue in the overcurrent area. The excessive area is not hindered by the water tongue. The ventilation is smooth, thereby stabilizing the air pressure in the vertical well.

2. In the diverting device of the present invention, the second partition and the third partition are arranged in an arc-shaped curved surface. When the flow rate is large, the flow velocity of the water flow is large, and the part of the water flow that is diverted from the first partition will continue to surround the arc. The curved surface partition makes a rotating motion, and then hits the well wall. Part of the water flow continues to rotate against the wall surface and falls, and part of the water flow will directly fall freely from the well. Therefore, on the one hand, the broken amount of the water flow is reduced, air entrainment is reduced, and the The pressure at the bottom of the shaft improves the odor escaping problem caused by air entrainment. On the other hand, it increases the friction force, and increases the loss along the way compared to falling directly in the shaft, which can well eliminate the kinetic energy of the water flow , to prevent the impact of falling water on the bottom of the shaft.

Description of drawings

FIG. 1 is a schematic structural diagram of a drop-flow vertical shaft with a swirling flow split water inlet structure according to the present invention.

FIG. 2 is a schematic structural diagram of a drop-flow shaft with a swirling flow split water inlet structure according to the present invention.

FIG. 3 is a schematic structural diagram of the shunt device of the present invention.

Description of reference numerals: 10, shaft; 11, first cavity; 12, second cavity; 13, third cavity; 24, the first intersection line; 25, the second intersection line; 30, the air inlet pipe; 40, the water inlet pipe; 41, the first water inlet; 42, the second water inlet; 50, the drainage horizontal pipe; A1, the extension line of the horizontal center line of the water inlet pipe; A2, the vertical center line of the shaft.

Detailed ways

In order to better understand the technical content of this practical new model, the specific embodiments and the attached formulas are described as follows.

Aspects of the invention are described in this disclosure with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be understood that the various concepts and embodiments presented above, as well as those concepts and implementations described in greater detail below, can be implemented in any of numerous ways.

With reference to Figures 1-3, the present utility model provides a drop-flow shaft with a swirl flow split water inlet structure, and the shaft is divided into a flow area and a gas flow through a first baffle, a second baffle and a third baffle area, to ensure smooth ventilation in the shaft; at the same time, change the inflow mode of the water inlet pipe, so that the water flow rotates along the second and third partitions, and along both sides of the second and third partitions Falling, while reducing the amount of air entrainment, it can also play the role of energy dissipation and anti-collision.

As shown in Figure 1, in the examples of examples, a decline and vertical shaft with a spin -type diversion of water inlet structure, including vertical wells 10 and a diversion device located in the vertical shaft 20.

One side of the vertical shaft is provided with an air inlet pipe 30 and a water inlet pipe 40, the air inlet pipe 30 is arranged above the water inlet pipe 40, and the bottom of the vertical shaft is vertically connected with the drainage horizontal pipe 50 to form a passage.

1 and 2, the flow dividing device 20 includes a first partition 21, a second partition 22 and a third partition 23 with the same height. The surface of the first partition 21 is flat, and the second partition The surfaces of the partition plate 22 and the third partition plate 23 are both arc-shaped curved surfaces.

The first end face of the first separator 21 , the first end face of the second separator 22 and the first end face of the third separator 23 are connected in pairs, and a first intersection line 24 is formed at the connection, and the second separator The plates 22 and the third partitions 23 are symmetrically distributed along the first partition.

The second end face of the first partition 21 is connected with the inner wall of the shaft, and a second intersection line 25 is formed at the connection, wherein the midpoint of the second intersection line is located on the extension line A1 of the horizontal center line of the water inlet pipe , and the first partition divides the connection between the water inlet pipe and the vertical shaft into a first water inlet 41 and a second water inlet 42 .

The second end surface of the second partition plate 22 and the second end surface of the third partition plate 22 are both connected to the inner wall of the shaft.

In this way, the first partition 21, the second partition 22 and the third partition 23 divide the inner cavity of the shaft into the first cavity 11, the second cavity 12 and the third cavity 13, the first cavity 11 and the third cavity 13. The second cavity 12 is a flow area, and the third cavity 13 is a gas flow area.

In a preferred embodiment, the first line of intersection 24 coincides with the vertical centerline A2 of the shaft.

As shown in Figure 2, in the preferred embodiments, the structure of the second parts 22 and the third partition 23 is the same.

In an optional embodiment, in the arc surface formed by the cross sections of the second partition plate 21 and the third partition plate 23, the radius R of the circle where the arc surface is located is 1/2 of the shaft diameter, and the central angle θ is 30°～ 60°, and the central angle θ is particularly preferably 45°.

By setting the appropriate camber curvature and the positions of the second baffle 21 and the third baffle 23, more water flow can be rotated, so that the water flow is less broken and the energy dissipation effect is better.

As shown in FIG. 3 , in a preferred embodiment, the thickness W1 of the second separator 22 and the third separator 23 is 1/2 of the thickness W2 of the first separator.

It should be understood that the structures of the second partition plate 22 and the third partition plate 23 may be different, and the same structure can make the second partition plate 22 and the third partition plate 23 symmetrically distributed with the extension line L1 of the first partition plate as the axis of symmetry, so that the The inflow force is equal and the stability is better, but it can be selected according to the actual situation.

In a preferred embodiment, the first partition 21 is a rectangular plate, wherein the length L is 1/2 of the diameter of the shaft, the height H is 2-3 times the diameter of the water inlet pipe, and the thickness W2 is 1/2 of the diameter of the water inlet pipe /8～1/10.

In an optional embodiment, the diameter of the water inlet pipe 40 is 1/2 of the diameter of the vertical shaft, and the length of the water inlet pipe 40 is 10-12 times the diameter of the water inlet pipe.

In an optional embodiment, the diameter of the intake pipe 30 is 1/4 of the diameter of the vertical shaft, and the length of the intake pipe 30 is 2-4 times the diameter of the intake pipe.

In an optional embodiment, the distance between the 30 distance of the trachea 30 is 1/45 to 2/45 of the length of the vertical well.

In an optional embodiment, the distance between the 40 distance of the water pipe in the water pipe is 1/9 to 2/9 of the length of the vertical well.

In an optional embodiment, the diameter of the drainage transverse pipe 50 is the same as the diameter of the vertical shaft.

The working principle of the downflow vertical shaft with the swirl flow split water inlet structure of the utility model

By constructing the diverting device 20 in the vertical shaft 10, the water flow can enter the first cavity 11 and the second cavity 12 along the first water inlet 41 and the second water inlet 42, respectively, and fall down, so that the water flow in the water inlet pipe can be avoided. The water flow directly hits the well wall, forming a huge water tongue. The existence of the water tongue will occupy most of the air circulation channels in the well, and it is easy to form an area with constant negative pressure. 13. Reserve a channel for air circulation in the shaft to stabilize the air pressure in the shaft.

The water flow in the water inlet pipe is divided into two parts, and the movement form of the water flow in the first cavity 11 and the second cavity 12 is: when the flow rate is small, the water flow in the first cavity 11 and the second cavity 12. 12 falls freely or hits the well wall in the cavity; when the flow rate is large, the water flow velocity is large, the water flow moves along the first baffle 21, and then on the second baffle 22 and the third baffle 23 Make a rotating motion, and continue to move to the well wall, and continue to rotate around the well wall and fall under the action of inertial force. Since the water flow is close to the partition and the well wall, it rotates and falls, reducing the amount of water fragmentation. , reducing air entrainment, thereby reducing the pressure at the bottom of the shaft, and also greatly increasing the friction between the water flow and the well wall and the partition, which can eliminate the huge kinetic energy carried by the water flow.

Although the present invention has been exposed in better embodiments, it is not used to limit the present invention. Those who have common knowledge in the technology field of the invention should be used as a variety of more movement and decorations within the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall prevail as the definition of claims.

Claims (10)

1. A drop flow vertical shaft with a spiral-flow type flow-dividing water inlet structure is characterized by comprising a vertical shaft and a flow dividing device arranged in the vertical shaft;

an air inlet pipe and a water inlet pipe are arranged on one side of the vertical shaft, the air inlet pipe is arranged above the water inlet pipe, and the bottom of the vertical shaft is vertically connected with the horizontal drainage pipe to form a passage;

the flow dividing device comprises a first partition plate, a second partition plate and a third partition plate which are equal in height, the surface of the first partition plate is a plane, and the surfaces of the second partition plate and the third partition plate are both arc-shaped curved surfaces;

the first end face of the first partition plate, the first end face of the second partition plate and the first end face of the third partition plate are connected in pairs, a first intersection line is formed at the joint, and the second partition plate and the third partition plate are symmetrically distributed along the first partition plate;

the second end surface of the first partition board is connected with the inner wall of the vertical shaft, and a second intersecting line is formed at the connecting position, wherein the midpoint of the second intersecting line is positioned on the extension line of the horizontal center line of the water inlet pipe, and the first partition board divides the connecting port of the water inlet pipe and the vertical shaft into a first water inlet and a second water inlet;

the second end face of the second partition plate and the second end face of the third partition plate are connected with the inner wall of the vertical shaft;

the first partition plate, the second partition plate and the third partition plate divide an inner cavity of the shaft into a first cavity, a second cavity and a third cavity, the first cavity and the second cavity are overflow areas, and the third cavity is an air passing area.

2. The drop shaft with cyclonic split water entry structure of claim 1 wherein the first line of intersection coincides with the vertical centerline of the shaft.

3. The drop shaft with a cyclonic split flow water intake structure of claim 1, wherein the second partition and the third partition are structurally identical.

4. The drop shaft with the rotational flow type flow dividing and water inlet structure as claimed in claim 3, wherein in the arc surface formed by the cross section of the second partition plate, the radius of the circle where the arc surface is located is 1/2 of the diameter of the shaft, and the central angle is 30-60 degrees.

5. The drop shaft with a cyclonic split water intake structure of claim 3, wherein the thickness of the second partition is 1/2 of the thickness of the first partition.

6. The drop shaft with the spiral-flow type flow splitting water inlet structure as claimed in claim 1, wherein the first partition plate is a rectangular plate, the width of the rectangular plate is 1/2 of the diameter of the shaft, the height of the rectangular plate is 2-3 times of the diameter of the water inlet pipe, and the thickness of the rectangular plate is 1/8-1/10 of the diameter of the water inlet pipe.

7. The drop flow shaft with the rotational flow type flow dividing water inlet structure as claimed in claim 1, wherein the diameter of the water inlet pipe is 1/2 of the diameter of the shaft, and the length of the water inlet pipe is 10-12 times of the diameter of the water inlet pipe.

8. The drop flow shaft with the rotational flow type flow dividing water inlet structure as claimed in claim 1, wherein the diameter of the air inlet pipe is 1/4 of the diameter of the shaft, and the length of the air inlet pipe is 2-4 times of the diameter of the air inlet pipe.

9. The drop shaft with the rotational flow type flow splitting water inlet structure as claimed in claim 1, wherein the distance from the air inlet pipe to the top of the shaft is 1/45-2/45 of the length of the shaft, and the distance from the water inlet pipe to the top of the shaft is 1/9-2/9 of the length of the shaft.

10. The fall shaft with a cyclonic split water intake structure according to claim 1, wherein the diameter of the horizontal drain pipe is the same as the diameter of the shaft.

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