Drainage well for converting pressure flow into gravity flow
By using pressure relief wells, gradually expanding horn bends and pressure relief retaining wall structures in drain wells, the pressure flow is converted into gravity flow, which solves the problem of pressure flow erosion on municipal pipelines and rivers, and realizes the conversion of water flow state and The elimination of the impact extends the service life of the facility.
Patent Information
- Application Number
- CN202420988506.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In municipal drainage systems, when pressure flow is directly discharged into municipal pipelines or rivers, it is easy to cause downstream pipeline overflow and river erosion, affecting the stable flow state of the river.
Design a drainage well structure including pressure relief well, water inlet pipe, outlet pipe, trunk bend pipe and pressure relief retaining wall. The pressure flow is converted into gravity through the trunk bend pipe and pressure relief retaining wall in the pressure relief well. flow to prevent fluid from turning and impacting.
Effectively eliminate the impact of pressure flow on downstream pipelines and rivers, extend the service life of the facility, and realize the conversion of water flow state.
Smart Images
Figure CN222252414U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of urban sewage discharge, and in particular relates to a drainage well for converting a pressure flow into a gravity flow. Background Art
[0002] In the municipal drainage system, the drainage system is mostly gravity pipes, which are used to collect drainage from users along the line. With the growth of drainage lines, the buried depth of drainage pipes gradually deepens, and it is necessary to set up drainage pump stations in combination with drainage routes. The water discharged from the pump stations is pumped out by pressure flow, or discharged into the adjacent municipal main pipe or into the river. If it is directly discharged into the municipal main pipe by pressure, since the pressurized fluid enters the gravity pipe, the original water pressure has not disappeared, and the excess pressure will be supported to the top of the inspection well, and there is a risk of overflow in the downstream pipe network. If it is directly discharged into the river by pressure flow, the pressure of the pressurized fluid will impact the revetment, which will have a scouring effect on the revetment. At the same time, the pressurized water flow will impact the normal and stable flow state of the river, causing unstable local flow velocity in the river, affecting the river revetment and the flow state of the river water. Therefore, direct discharge by pressure flow is a particularly unfavorable choice, so it is necessary to propose a method to convert the pressure flow into gravity flow to reduce the impact on the downstream pipe network and river. Summary of the invention
[0003] The utility model aims to design a drainage well which has a simple structure, perfect functions and economical cost and is suitable for municipal drainage and is used for converting pressure flow into gravity flow.
[0004] The utility model provides a drainage well for converting pressure flow into gravity flow, comprising: a pressure relief well, a water inlet pipe, a water outlet pipe, a gradually expanding trumpet elbow pipe and a pressure relief retaining wall; wherein:
[0005] The water inlet pipe and the water outlet pipe are respectively arranged on two opposite well walls of the pressure relief well; the water inlet pipe is connected to the upstream pressure water pipe, and the pressure flow enters the pressure relief well through the water inlet pipe; the water outlet pipe is connected to the downstream gravity water outlet pipe or the river discharge outlet;
[0006] The gradually expanding trumpet elbow is arranged in the pressure relief well, one end of which is a water inlet connected to the water inlet pipe, and the other end is a water outlet, the axial angle between the water outlet and the water inlet is 90 degrees; the water outlet faces downward, and the size of the water outlet is larger than the size of the water inlet; in this way, the direction of the pressure flow can be changed, so that the pressure flow direction is changed to vertically downward and impact the bottom of the inner cavity of the pressure relief well;
[0007] The pressure relief retaining wall is arranged at the bottom and the middle of the inner cavity of the pressure relief well, wherein the bottom pressure relief retaining wall is fully arranged, and the middle pressure relief retaining wall is a horizontal retaining wall in the middle, and the top and bottom of the retaining wall have gaps for water flow to pass through. Figure 2 , Figure 3As shown; the pressure relief retaining wall is used to prevent the upstream pressure flow from directly rushing into the downstream gravity pipe after entering the well. After the pressure flow passes through the gradually expanding trumpet bend, the pressure relief retaining wall can effectively prevent the fluid from flipping up and impacting the downstream.
[0008] In the utility model, the pressure relief retaining wall adopts a reinforced concrete structure, and its height is determined by specific calculation through the actual pressure relief well size and the flow velocity of the water in the area; the height of the pressure relief retaining wall can be determined by the following formula: H=(flow / pressure relief well plane size+water outlet head+0.2).
[0009] In the utility model, the gradually expanding trumpet elbow pipe is made of steel pipe fittings, and the size of the steel pipe fittings is determined by specific calculation.
[0010] In the utility model, a maintenance cylinder for people to enter is provided on the top of the pressure relief well, so that workers can enter the pressure relief well to carry out cleaning and maintenance.
[0011] In the utility model, the pressure relief well and related water inlet and outlet pipes are arranged at the end of the pressure flow drainage system.
[0012] In the utility model, the sizes of the pressure relief well, the water inlet pipe, the water outlet pipe, the gradually expanding trumpet elbow pipe and the pressure relief retaining wall can be designed and determined according to actual engineering needs.
[0013] When the utility model is in operation, when water flows under pressure from the upstream, it enters the pressure relief well through the water inlet pipe and the gradually expanding trumpet bend pipe, and the water flow direction is converted to vertically downward, and the water flow impacts the pressure relief retaining wall. In this way, the pressure relief retaining wall can effectively organize the pressure flow to impact the downstream gravity pipe. After the pressure flow impacts the bottom of the pressure relief well, it overflows through the space channel at the bottom of the pressure relief retaining wall and enters the downstream gravity pipe, thereby realizing the process of converting the pressure flow to the gravity flow.
[0014] The utility model is suitable for the end of a pressure flow water delivery pipeline and is used to eliminate the influence of the pressure flow entering the gravity flow. It has the functions of converting the water flow state, eliminating the influence of the pressure flow on the gravity flow, and has the characteristics of long service life of the facility. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure plane of the utility model.
[0016] Figure 2 It is a schematic diagram of the AA section of the structure of the utility model.
[0017] Figure 3 It is a schematic diagram of the BB cross-sectional view (bottom plane) of the structure of the utility model.
[0018] The numbers in the figure are: 1 is the pressure relief well, 2 is the water inlet pipe, 3 is the water outlet pipe, 4 is the pressure relief retaining wall, 5 is the gradually expanding trumpet elbow pipe; 6 is the inspection tube, 7 is the ladder, 8 is the short wall pipe, 9 is the manhole cover, D1 is the diameter of the water inlet pipe 2, and D2 is the diameter of the water outlet pipe 3. DETAILED DESCRIPTION
[0019] The present invention is further described below through specific embodiments.
[0020] The utility model comprises a pressure relief well 1, a water inlet pipe 2, a water outlet pipe 3, a pressure relief retaining wall 4 and a gradually expanding trumpet elbow 5; wherein:
[0021] The pressure relief well 1 has a rectangular well body cavity;
[0022] The water inlet pipe 2 and the water outlet pipe 3 are respectively arranged on the two opposite side walls of the pressure relief well, and the connection method is a flexible connection; the water inlet pipe 2 is connected to the upstream pressure flow water pipe, and the pressure flow enters the pressure relief well 1 through the water inlet pipe 2; the water outlet pipe 3 is connected to the downstream gravity water outlet pipe or the river discharge outlet;
[0023] The gradually expanding trumpet elbow 5 is arranged in the pressure relief well, one end of which is a water inlet, connected to the water inlet pipe 2 through a short wall pipe 8, and the other end is a water outlet, the axial angle between the water outlet and the water inlet is 90 degrees; the water outlet faces downward, and the size of the water outlet is larger than the size of the water inlet, so that the direction of the pressure flow can be changed, so that the pressure flow direction is changed to vertically downward and impact the bottom of the inner cavity of the pressure relief well 1;
[0024] The pressure relief retaining wall 4 is arranged at the bottom and middle of the inner cavity of the pressure relief well 1, wherein:
[0025] The bottom pressure relief retaining wall is fully paved and located near the center line. The bottom pressure relief retaining wall is divided into a left low and a right high setting, that is, the pressure relief retaining wall below the gradually expanding trumpet elbow 5 is lower in height, and the right side pressure relief retaining wall is higher, forming a step structure, which can effectively prevent the pressure flow from impacting the bottom pressure relief retaining wall to form a horizontal flow directly impacting the outlet pipe 3; the middle pressure relief retaining wall is a middle section of a horizontal retaining wall, and a gap is left at the bottom for water flow to pass through, such as Figure 2 , Figure 3 As shown; in this way, the gap formed between the bottom and the middle pressure relief retaining wall allows the water to flow evenly and stably through the gap after the pressure is released and flow to the outlet pipe 3;
[0026] The pressure relief retaining wall 4 is used to prevent the upstream pressure flow from directly rushing into the downstream gravity pipe after entering the well. After the pressure flow passes through the gradually expanding trumpet bend 5, the pressure relief retaining wall 4 can effectively prevent the fluid from turning up and impacting the downstream.
[0027] The pressure relief retaining wall 4 adopts a reinforced concrete structure, and its height is determined by specific calculation based on the actual pressure relief well size and the flow rate of water in the area; the height of the pressure relief retaining wall 4 can be determined by the following formula: H=(flow / pressure relief well plane size+water outlet head+0.2).
[0028] The gradually expanding trumpet elbow 5 is made of steel pipe, and its size is determined by specific calculation.
[0029] A maintenance cylinder 6 for people to enter is provided at the top of the pressure relief well 1. The maintenance cylinder 6 extends to the ground, and a well cover 9 is provided at the cylinder mouth for sealing. A ladder 7 is provided on the side of the maintenance cylinder 6 for workers to enter the pressure relief well 1 through the ladder 7 for cleaning and maintenance.
[0030] The pressure relief well and related water inlet and outlet pipes are arranged at the end of the pressure flow drainage system.
[0031] When the utility model is in operation, when water flows under pressure from the upstream, it enters the pressure relief well through the water inlet pipe and the gradually expanding trumpet bend pipe, and the water flow direction is converted to vertically downward. The water flow impacts the bottom pressure relief retaining wall and the backwash water flow instantly aroused by the water flow impacts the middle pressure relief retaining wall. In this way, the pressure relief retaining wall can effectively organize the pressure flow to impact the downstream gravity pipe. After the pressure flow impacts the bottom of the pressure relief well, it overflows into the downstream gravity pipe through the space channel at the bottom of the pressure relief retaining wall, thereby realizing the process of converting the pressure flow to the gravity flow.
[0032] The utility model is suitable for the end of a pressure flow water delivery pipeline and is used to eliminate the influence of the pressure flow entering the gravity flow. It has the functions of converting the water flow state and eliminating the influence of the pressure flow on the gravity flow and has the characteristics of long service life of the facility.
[0033] Although the above methods are illustrated and described as a series of structures for simplicity of explanation, it should be understood and appreciated that these methods are not specifically limited because according to one or more embodiments, some structures may occur in different orders and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.
[0034] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A drainage well for converting pressure flow into gravity flow, characterized in that: include: Pressure relief well, water inlet pipe, water outlet pipe, gradually expanding trumpet elbow and pressure relief retaining wall; among which: The water inlet pipe and the water outlet pipe are respectively arranged on two opposite well walls of the pressure relief well; the water inlet pipe is connected to the upstream pressure water pipe, and the pressure flow enters the pressure relief well through the water inlet pipe; the water outlet pipe is connected to the downstream gravity water outlet pipe or the river discharge outlet; The gradually expanding trumpet elbow is arranged in the pressure relief well, one end of which is a water inlet connected to the water inlet pipe, and the other end is a water outlet, the axial angle between the water outlet and the water inlet is 90 degrees; the water outlet faces downward, and the size of the water outlet is larger than the size of the water inlet; in this way, the direction of the pressure flow can be changed, so that the pressure flow direction is changed to vertically downward and impact the bottom of the inner cavity of the pressure relief well; The pressure relief retaining wall is arranged at the bottom and the middle of the inner cavity of the pressure relief well, wherein the bottom pressure relief retaining wall is fully paved, and the middle pressure relief retaining wall is a horizontal retaining wall in the middle section, with gaps at the top and bottom for water to flow through.
2. The drainage well for converting pressure flow into gravity flow according to claim 1, characterized in that: The pressure relief retaining wall adopts a reinforced concrete structure.
3. The drainage well for converting pressure flow into gravity flow according to claim 1, characterized in that: The gradually expanding trumpet elbow is made of steel pipe fittings.
4. The drainage well for converting pressure flow into gravity flow according to claim 1, characterized in that: The top of the pressure relief well is provided with an inspection tube for people to enter.