阅读说明：本技术 一种跌流竖井与旋流竖井转换的流态自适应性立面衔接导流结构 (Flow state self-adaptive vertical face connection flow guide structure for conversion of drop flow vertical shaft and rotational flow vertical shaft ) 是由 卫望汝 许唯临 邓军 刘善均 王韦 田忠 张法星 于 2021-07-01 设计创作，主要内容包括：本发明公开了一种跌流竖井与旋流竖井转换的流态自适应性立面衔接导流结构,包括依次衔接的衔接区水平段、竖井进口可旋转导流结构、衔接区竖井段；竖井进口可旋转导流结构由与衔接区竖井段直径相同的二分之一圆筒和与二分之一圆筒相切且呈一体结构的两面可变侧墙构成；二分之一圆筒与竖井段顶部边缘通过具有阻尼结构的转轴连接,使竖井进口可旋转导流结构随衔接区水平段的来流冲击作用强弱自适应性地向来流方向转动；所述可变侧墙通过止水结构与衔接区水平段侧墙衔接。本发明所述导流结构能够解决大流量下跌水竖井衔接段封堵,小流量下旋流竖井衔接段边墙需过高设计,增大工程投资的问题,保障市政工程中排水管渠立面水流衔接安全高效运行。(The invention discloses a flow state self-adaptive vertical surface connection flow guide structure for conversion of a drop flow vertical shaft and a rotational flow vertical shaft, which comprises a connection area horizontal section, a vertical shaft inlet rotatable flow guide structure and a connection area vertical shaft section which are connected in sequence; the rotatable flow guide structure of the shaft inlet consists of a half cylinder with the same diameter as the shaft section of the joining area and two variable side walls which are tangent to the half cylinder and are of an integral structure; the half cylinder is connected with the edge of the top of the vertical shaft section through a rotating shaft with a damping structure, so that the rotatable flow guide structure at the inlet of the vertical shaft can adaptively rotate towards the current direction along with the strength of the impact of the incoming current of the horizontal section of the connecting area; the variable side wall is connected with the side wall of the horizontal section of the connection area through a water stop structure. The flow guide structure can solve the problems that the connection section of the high-flow drop vertical shaft is blocked, the side wall of the connection section of the low-flow lower rotational flow vertical shaft needs to be designed to be too high, and the engineering investment is increased, and ensures safe and efficient operation of water flow connection of the vertical surface of the drainage pipe canal in municipal engineering.)

1. A flow state self-adaptive vertical face connection flow guide structure for conversion of a drop flow vertical shaft and a rotational flow vertical shaft is characterized in that the flow state self-adaptive vertical face connection flow guide structure is arranged in a vertical face turning connection area of a rectangular-section pipe duct and a circular-section vertical shaft and comprises a connection area horizontal section, a vertical shaft inlet rotatable flow guide structure and a connection area vertical shaft section which are sequentially connected; the rotatable flow guide structure of the vertical shaft inlet is composed of a half cylinder with the same diameter as the vertical shaft section in the joining area and two variable side walls which are tangent to the half cylinder and are of an integral structure; the half cylinder is connected with the edge of the top of the vertical shaft section through a rotating shaft with a damping structure, so that the rotatable flow guide structure at the inlet of the vertical shaft can rotate in the direction of the incoming flow adaptively along with the strength of the impact action of the incoming flow of the horizontal section of the connecting area, and the conversion from the flow falling vertical shaft to the rotational flow vertical shaft is realized; the variable side wall is connected with the side wall of the horizontal section of the connection area through a water stop structure; and the area of the variable side wall meets the requirement that the horizontal section of the joining area and the vertical well section of the joining area are completely covered in the rotating process.

2. The flow adaptive elevation engagement flow guiding structure for conversion of a drop shaft and a swirl shaft according to claim 1, wherein the engagement edge of the half cylinder of the rotatable flow guiding structure at the shaft inlet and the shaft section at the engagement area is provided with a water stop baffle extending towards the inside of the shaft section so as to block a gap after the half cylinder is separated from the top of the shaft during rotation of the rotatable flow guiding structure at the shaft inlet.

3. The flow state adaptive vertical surface joint flow guiding structure for conversion of the drop shaft and the rotational flow shaft as claimed in claim 2, wherein the shape of the water stop baffle is a circular arc surface matched with the cylindrical wall surface of the shaft section.

4. The flow adaptive vertical joint flow guiding structure for conversion of a drop shaft and a swirl shaft according to claim 1, wherein the width of the bottom plate of the horizontal section of the joint region is equal to the diameter of the vertical section of the joint region, and the bottom plate of the horizontal section of the joint region is connected with the top wall surface of the vertical section of the joint region.

5. The flow adaptive vertical surface joint flow guiding structure for conversion of a drop shaft and a swirl shaft according to claim 1, wherein the height of one half cylinder of the rotatable flow guiding structure at the shaft inlet is 1-3 times of the diameter of the shaft section, and the height of the shaft section at the joint area is 0.5-1.5 times of the diameter of the shaft section.

6. The flow adaptive elevation-engaging flow guiding structure for conversion of a drop shaft and a swirl shaft according to claim 1, wherein the variable side wall of the rotatable flow guiding structure at the shaft inlet is a fan-shaped or semicircular plane.

7. The flow adaptive vertical surface joint flow guiding structure for conversion of a drop shaft and a swirl shaft according to claim 1, wherein a rotating shaft connecting the rotatable flow guiding structure at the shaft inlet and the vertical shaft section of the joint area meets the requirement that the rotatable angle of one half cylinder ranges from 30 degrees to 45 degrees.

8. The flow state adaptive vertical surface connection flow guide structure for the conversion of the drop shaft and the rotational flow shaft according to claim 1, wherein the rotating shaft with the damping structure is a rotating shaft provided with a spring, so that the rotatable flow guide structure at the shaft inlet rotates along with the magnitude of the stress when impacted by incoming flow, and automatically restores to the initial state when the impact of water flow disappears.

Technical Field

The invention belongs to the technical field of drainage pipeline connection in municipal engineering, and particularly relates to a flow state adaptive vertical surface connection flow guide structure for switching a drop flow vertical shaft and a rotational flow vertical shaft.

Background

As underground drainage pipelines at different elevation positions arranged in municipal engineering, a design form of a joint structure for turning of a vertical face is often encountered due to the arrangement requirements of different areas of the vertical face and the joint among different pipelines. The design of turning and connecting the water flow on the vertical surface of the existing pipeline is mainly to arrange a vertical shaft at a quarter turn joint position, guide the water flow to flow in the horizontal direction of an upper-layer pipe area, and enter a pipe duct with a lower elevation position along the vertical flow of the vertical shaft under the action of gravity through the turn joint. At present, the design form of the turning of the vertical surface of the drainage pipeline mainly comprises a water drop vertical shaft pipeline and a rotational flow vertical shaft pipeline, and the two forms are widely applied to municipal engineering.

For a water drop vertical shaft, water flow positively enters an inlet of a vertical shaft at a connection section under the guidance of a plane pipe canal vertical shaft, directly impacts a facing area of the vertical shaft under the action of inertia, and then vertically and downwardly moves along the vertical shaft under the action of inertia, however, along with the increase of water flow, under the action of the direct impact, in the connection area at the inlet of the vertical shaft, the water flow impact causes the flow velocity to be reduced, the water depth to be increased, and the phenomenon of upward water blocking and water blocking easily occur in the connection area, so that the water wall effect is generated, and the connection section is blocked and the drainage is not smooth. For guaranteeing unobstructed, often through the size that increases the shaft structure, reduce the influence of harmony water, nevertheless can greatly increased engineering volume and design burden to the hydraulic phenomenon that can't avoid the surface of water harmony water to increase often faces and predicts improper turning section node under the extreme drainage demand condition and blocks, and rivers excrete not smoothly, influences the smooth and easy problem of operation of whole municipal pipe network even.

For the rotational flow vertical shaft, water flow enters the vertical shaft along the lateral inlet of the vertical shaft under the guide of the lateral contraction of the plane pipe channel, and then performs rotational flow motion along the wall surface of the vertical shaft, and simultaneously moves downwards in combination with the action of gravity to enter the drainage pipe channel with lower elevation. However, because the water flow needs to be guided to laterally enter the vertical shaft, the design form of lateral contraction of the plane pipe canal leads to the reduction of the water flow width along the way and the gradual increase of the water depth, therefore, a higher side wall is often required to be designed for the horizontal vertical joint area to ensure that the stable lateral inflow flow state is realized before the water flow enters the vertical shaft, under the condition of smaller water discharge requirement, the engineering quantity and the design burden can be greatly increased, the investment is increased, and the design requirements can not be met for dense urban pipeline arrangement groups and areas with relatively complex geological conditions.

Disclosure of Invention

The invention aims to provide a flow state self-adaptive vertical surface connection flow guide structure for switching a drop shaft and a rotational flow shaft, aiming at overcoming the problems that a connection section of the drop shaft with large flow is blocked, and a side wall of a connection section of the rotational flow shaft with small flow needs to be designed too high, so that the engineering investment is increased, and the safe and efficient operation of water flow connection of the vertical surface of a drainage pipe in municipal engineering is guaranteed.

The invention provides a flow state self-adaptive vertical face connection flow guide structure for conversion between a drop flow vertical shaft and a rotational flow vertical shaft, which is arranged in a vertical face turning connection area of a rectangular-section pipe duct and a circular-section vertical shaft and comprises a connection area horizontal section, a vertical shaft inlet rotatable flow guide structure and a connection area vertical shaft section which are connected in sequence; the rotatable flow guide structure of the vertical shaft inlet is composed of a half cylinder with the same diameter as the vertical shaft section in the joining area and two variable side walls which are tangent to the half cylinder and are of an integral structure; the half cylinder is connected with the edge of the top of the vertical shaft section through a rotating shaft with a damping structure, so that the rotatable flow guide structure at the inlet of the vertical shaft can rotate in the direction of the incoming flow adaptively along with the strength of the impact action of the incoming flow of the horizontal section of the connecting area, and the conversion from the flow falling vertical shaft to the rotational flow vertical shaft is realized; the variable side wall is connected with the side wall of the horizontal section of the connecting area through the water stop structure, and the area of the variable side wall meets the requirement that the connecting port of the horizontal section of the connecting area and the vertical well section of the connecting area is kept to be completely covered in the rotating process, so that air leakage and water leakage are avoided.

Furthermore, a water stop baffle extending towards the inside of the vertical shaft section is arranged on the connecting edge of the half cylinder of the rotatable flow guide structure at the vertical shaft inlet and the vertical shaft section at the connecting area, so that a gap formed after the half cylinder is separated from the top of the vertical shaft is sealed in the rotating process of the rotatable flow guide structure at the vertical shaft inlet, and air leakage and water leakage are prevented. Preferably, the shape of the water stop baffle is a circular arc surface matched with the cylindrical wall surface of the shaft section.

Furthermore, the width of the bottom plate of the horizontal section of the joining area is equal to the diameter of the vertical shaft section of the joining area, and the bottom plate of the horizontal section of the joining area is connected with the top wall surface of the vertical shaft section of the joining area.

Furthermore, the height of one half of the cylinder of the rotatable flow guide structure at the shaft inlet is 1-3 times of the diameter of the shaft section, and the height of the shaft section in the joining area is 0.5-1.5 times of the diameter of the shaft section.

Furthermore, the variable side wall of the rotatable flow guide structure of the shaft inlet is fan-shaped or semicircular.

Furthermore, a rotating shaft connecting the rotatable flow guide structure at the shaft inlet with the shaft section of the joining area ensures that the rotatable angle range of one half cylinder is 30-45 degrees.

Furthermore, the water stopping structure is two water stopping adhesive tapes arranged on the edge of the variable side wall and the horizontal section side wall of the linking area, the adhesive tapes on the horizontal section side wall are matched with the sliding track of the variable side wall, the two adhesive tapes are kept in close contact with each other in the rotating process of the variable side wall, the contact surface is dense, water stopping is guaranteed, and meanwhile the rotating process is not influenced. Preferably, the two water stop rubber strips are made of rubber with good elasticity.

Furthermore, the rotating shaft with the damping structure is preferably a rotating shaft provided with a spring, so that the rotatable flow guide structure at the shaft inlet rotates along with the stress action when impacted by incoming flow, and automatically restores to the initial state when the impact action of the incoming flow disappears. Other materials or structures having the same function may be selected instead.

In the invention, the flow state self-adaptive vertical surface connection flow guide structure for converting the drop flow vertical shaft and the rotational flow vertical shaft is usually arranged at the connection position of the rectangular cross section pipe channel with a lower elevation away from the ground and the circular cross section vertical shaft, and water is conveyed to a deeper underground position from a position close to the ground through the connection of the flow guide structure and the vertical shaft.

The water flow state when the flow state self-adaptive vertical face connection flow guide structure converted from the drop flow vertical shaft and the rotational flow vertical shaft runs is as follows:

under the initial condition, the section size of the vertical shaft inlet conversion section is consistent with that of a downstream vertical shaft, when the water flow is small, water flows pass through the horizontal section of the connection area to enter the vertical shaft inlet conversion section in a drop water flow state, and impact to a facing vertical shaft area (a half cylindrical surface) under the action of inertia. Along with the increase of the water flow, the flow velocity of the water flow entering the connection area is increased along with the increase of the water flow impact action, the opposite surface (half cylindrical surface) of the vertical shaft can not bear the water flow impact of response under the vertical state, the rotatable flow guide structure of the vertical shaft inlet rotates, the opposite outermost point of the incoming flow is taken as a pivot, the half cylindrical surface and the variable side wall are driven to integrally rotate under the action of the water flow impact, the arc-shaped variable side wall has a larger fan-shaped area, so that a leakage area between the side wall and the bottom plate can be ensured, the water flow still enters the vertical shaft section under the constraint of the bottom plate and the arc-shaped variable side wall, the lower part is provided with a water stop baffle which can move along with the structure in the rotating process of the opposite surface of the vertical shaft, the side leakage area formed by the rotation of the vertical shaft section is filled, the water flow can not rush out of the vertical shaft, and the conversion section of the vertical shaft inlet forms an upper part with a large section, the similar back taper structure that the terminal section is little drives lower part stagnant water baffle rebound naturally, forms the stagnant water effect in this region, avoids structure overall structure to appear leaking the empty region. Under the action of the structure, water flows on two sides enter the inverted cone structure laterally along with the guide of the horizontal section straight wall, a rotational flow state of wall-attached motion is formed under the action of vertical contraction, and a water flow in the middle impacts the inclined inverted cone structure wall surface along with the inertia effect; along with the continuous increase of the water flow, the larger the difference of the cross section area of the upper end and the cross section area of the end is, the stronger the constraint of the similar inverted cone structure on the water flow rotational flow is, when the opposite side wall is inclined to 30-45 degrees, the middle water flow part impacts the inclined wall surface and forms a water flow state which is diffused towards two sides and rotates, thus, the water flow in the rotational flow state is completely formed in the vertical shaft, and a complete rotational flow vertical shaft is formed through self-adaptive adjustment. Along with the completion of the pipe canal leakage flow, the rotatable flow guide structure at the shaft inlet is restored to the original shape under the action of damping restoration of the connection section.

In the transformation process of the adaptive vertical face connection flow guide structure, the height of the side wall of the horizontal section of the connection area is kept unchanged, the height space of the side wall of the rotational flow vertical shaft is avoided, and meanwhile, the large section of the upper area of the vertical shaft inlet is changed, so that the unfavorable hydraulic phenomenon that the inlet is blocked by large-flow water flow is effectively guaranteed. The further rotary circular motion of rivers has fully utilized the original water cross section space of shaft, promotes sluicing flow and drainage ability, realizes the self-adaptation regulation purpose of "low discharge drop shaft operation, large-traffic whirl shaft operation", effectively alleviates the problem of canal water retention, jam, high side wall design in the process of the rivers turning through the facade, guarantees the smooth and easy operation of canal facade water conservancy linking.

Compared with the prior art, the invention has the following beneficial effects:

1. the flow state self-adaptive vertical face connection flow guide structure for switching the drop flow vertical shaft and the rotational flow vertical shaft can be designed into a drop flow vertical shaft form during initial design, so that a horizontal section side wall of a connection area is lower, the circular structure section of the vertical shaft is smaller, the design difficulty is reduced, and the construction engineering amount and the construction investment are saved.

2. According to the flow state self-adaptive vertical face connection flow guide structure for switching the drop shaft and the rotational flow shaft, the rotatable flow guide structure at the shaft inlet is adjusted along with the strength of the water flow impact effect, the vertical face shaft connection structure is switched from the drop shaft to the rotational flow shaft in an autonomous manner, small flow is guaranteed to run in the drop shaft, large flow is guaranteed to run in the rotational flow shaft, the connection section hydraulic safety operation efficiency can be greatly improved under the condition that the shaft inlet is not blocked, and the leakage requirements of different water flow can be met.

3. The flow state self-adaptive vertical face connection flow guide structure for converting the drop flow vertical shaft and the rotational flow vertical shaft has the advantages of easiness in construction, small engineering quantity and low cost, can be suitable for structural design of a newly-built pipe duct, can also be used for lifting and transforming an existing vertical face turning pipeline, and is wide in application range and strong in practicability.

Drawings

Fig. 1 is a schematic structural diagram of a flow state adaptive elevation joint flow guiding structure for conversion between a drop shaft and a swirl shaft in a drop shaft state (not rotating) according to the invention;

FIG. 2 is a structural diagram of the swirl shaft of the flow state adaptive elevation joint flow guiding structure converted from the drop shaft and the swirl shaft in the state (rotation);

FIG. 3 is a top view of the swirl shaft of the flow state adaptive elevation joint flow guiding structure converted from the drop shaft and the swirl shaft of the invention in a state (rotation);

FIG. 4 is a schematic view of the joint of the adhesive tapes on the variable side wall and the horizontal segment side wall.

In the figure, 1 is a horizontal section of a joining area, 2-1 is a half cylinder, 2-2 is a variable side wall, 3 is a vertical well section of the joining area, 4 is a water stop baffle, 5 is a rotating shaft, 6-1 is an adhesive tape on the side wall of the horizontal section, and 6-2 is an adhesive tape on the edge of the variable side wall.

Detailed Description

The invention will be further illustrated with reference to the following specific examples and the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

In the flow state adaptive elevation joint flow guiding structure for conversion between the drop shaft and the swirl shaft in this embodiment, as shown in fig. 1 to 3, the flow state adaptive elevation joint flow guiding structure for conversion between the drop shaft and the swirl shaft is generally arranged at a joint of a rectangular-section pipe channel at a lower elevation from the ground and a circular-section shaft, and water is transported from a position close to the ground to a deeper position underground through the joint of the flow guiding structure and the shaft. The flow guide structure comprises a horizontal section 1 of a joining area, a rotatable flow guide structure 2 of a shaft inlet and a vertical shaft section 3 of the joining area which are sequentially connected; the rotatable flow guide structure of the vertical shaft inlet is composed of a half 2-1 cylinder with the same diameter as the vertical shaft section in the joining area and two variable side walls 2-2 which are tangent to the half cylinder and are of an integral structure; the half cylinder is connected with the edge of the top of the vertical shaft section through a rotating shaft 3 with a damping structure, so that the rotatable flow guide structure at the inlet of the vertical shaft can rotate in the direction of the incoming flow in a strong and weak self-adaptive manner along with the impact action of the incoming flow at the horizontal section of the connecting area, and the conversion from the falling flow vertical shaft to the rotational flow vertical shaft is realized; the variable side wall is connected with the side wall of the horizontal section of the connecting area, and the area of the variable side wall meets the requirement that the connecting port of the horizontal section of the connecting area and the vertical section of the connecting area is kept to be completely covered in the rotating process, so that air leakage and water leakage are avoided.

And a water stop baffle 4 extending towards the inside of the shaft section is arranged on the connecting edge of the half cylinder 2-1 of the rotatable flow guide structure at the shaft inlet and the shaft section at the connecting area, so that a gap formed after the half cylinder is separated from the top of the shaft is blocked in the rotating process of the rotatable flow guide structure at the shaft inlet, and the leakage is prevented. The shape of the water stop baffle 4 is an arc surface matched with the cylindrical wall surface of the vertical shaft section. The height of one half of a cylinder of the rotatable flow guide structure at the shaft inlet is 3 times of the diameter of the shaft section, and the height of the shaft section at the joining area is 1 time of the diameter of the shaft section. The variable side wall of the rotatable flow guide structure at the shaft inlet is semicircular.

The width of the bottom plate of the horizontal section of the joining area is equal to the diameter of the vertical shaft section of the joining area, and the bottom plate of the horizontal section of the joining area is connected with the top wall surface of the vertical shaft section of the joining area. The water stopping structure is formed by two water stopping rubber strips 6-2 and 6-1 arranged on the edge of the variable side wall and the horizontal section side wall of the connecting area, the rubber strip 6-1 on the horizontal section side wall is matched with the sliding track of the variable side wall, the two rubber strips are kept in close contact in the rotating process of the variable side wall, the contact surface is compact, water stopping is guaranteed, and meanwhile the rotating process is not influenced. The two water stop rubber strips are made of rubber with good elasticity.

The rotating shaft connecting the rotatable flow guide structure at the shaft inlet with the shaft section of the connecting area ensures that the rotatable angle range of the half cylinder is 30-45 degrees. The rotating shaft with the damping structure is a rotating shaft provided with a spring, so that the rotatable flow guide structure at the shaft inlet rotates along with the stress action when impacted by incoming flow, and automatically restores to an initial state when the water impact action disappears.