Multi-stage energy dissipation well for pressure flow drainage pipeline

Abstract

The utility model belongs to the technical field of municipal pressure flow drainage engineering, and provides a pressure flow drainage pipeline multi-stage energy dissipation well which comprises a well chamber, a vertical pipe and a retention wall. The water retaining wall is vertically fixed in the well chamber, the water retaining wall divides the bottom in the well chamber into a water inlet chamber and a water outlet chamber, a water inlet is formed in the side wall of one side of the well chamber, the pressure drainage pipeline is inserted into the water inlet, the vertical pipe is arranged above the water inlet chamber, and the water outlet is formed in the side wall of the other side of the well chamber. The inner end of the pressure drainage pipeline is communicated with the top end of the vertical pipe, a water inlet concrete cushion layer is laid on the inner bottom face of the water inlet chamber, a pebble bed is laid on the water inlet concrete cushion layer, a horizontal drainage hole is formed in the side wall of the water retaining wall in a penetrating mode, and the bottom end of the drainage hole is flush with the top end of the water inlet concrete cushion layer. A water outlet is formed in the side wall of the water outlet chamber, and the gravity drainage pipeline is inserted into the water outlet. The energy dissipation well can solve the problems that an existing energy dissipation well is large in occupied space, and a retention wall is prone to damage due to large impact of water flow.

Description

Technical Field

[0001] The utility model belongs to the technical field of municipal pressure flow drainage engineering, and in particular relates to a multi-stage energy dissipation well of a pressure flow drainage pipeline. Background Art

[0002] In municipal drainage projects, rainwater and sewage are generally discharged by gravity flow. However, due to the conditions at the project site, rainwater and sewage need to be pressurized and transported to the downstream through a pressure pump station. Moreover, before the pressure transmission pipeline is connected to the downstream pipeline, it must be discharged after depressurization through an energy dissipation facility to reduce the impact of the water flow on the downstream pipeline.

[0003] Municipal pressure flow pipeline energy dissipation facilities mainly refer to the energy dissipation wells arranged between the pressure pipeline and the downstream pipeline to achieve the purpose of energy dissipation. At present, the mainstream energy dissipation wells are arranged with a water inlet chamber near the side of the pressure flow pipeline, a vertical water retaining wall is arranged in the middle of the well, and energy dissipation steps are arranged between the water retaining wall and the side near the downstream pipeline, so that the water flow can impact the water retaining wall for primary energy dissipation and the energy dissipation step waterfall for secondary energy dissipation. However, the water retaining wall of this energy dissipation well is impacted by water flow for a long time, and the wall structure is easily damaged by scouring, which has low safety. At the same time, a long water inlet chamber and energy dissipation steps need to be arranged before and after the water retaining wall, which has the disadvantages of large space occupation and high engineering investment. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a multi-stage energy dissipation well for a pressure flow drainage pipeline to solve the problems that the existing energy dissipation well occupies a large space and the retaining wall is easily damaged by the strong impact of the water flow.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-stage energy dissipation well of a pressure flow drainage pipeline, including a well chamber, a riser, and a retaining wall;

[0006] The retaining wall is vertically fixed in the well chamber, and the retaining wall divides the bottom of the well chamber into an inlet chamber and an outlet chamber. A water inlet compatible with a pressure drainage pipe is provided on the side wall of the well chamber, and the pressure drainage pipe is inserted in the water inlet. The riser is vertically arranged above the water inlet chamber, and the inner end of the pressure drainage pipe is connected with the top of the riser. A water inlet concrete cushion layer is paved on the bottom surface of the water inlet chamber, and a pebble layer is paved on the water inlet concrete cushion layer. A horizontally arranged drainage hole is penetrated through the side wall of the retaining wall, and the bottom end of the drainage hole is flush with the top of the water inlet concrete cushion layer. A water outlet compatible with a gravity drainage pipe is provided on the side wall of the outlet chamber, and the gravity drainage pipe is inserted in the water outlet.

[0007] Preferably, a plurality of drainage holes are provided on the side wall of the water retaining wall, and the plurality of drainage holes are evenly spaced apart.

[0008] Preferably, the projection of the riser on the pebble layer is located at the center of the upper surface of the pebble layer.

[0009] Preferably, the well chamber is buried under the ground, a manhole is provided on the top plate of the well chamber, a well shaft is provided above the well chamber, the bottom end of the well shaft is connected to the manhole, and the top end of the well shaft extends to the ground.

[0010] Preferably, two manholes are provided on the top plate of the well chamber, and the two manholes are respectively located above the water inlet chamber and the water outlet chamber. Two well shafts are provided above the well chamber, and the bottom ends of the two well shafts are respectively connected to the two manholes, and the top ends of the two well shafts extend to the ground.

[0011] Preferably, ladders are provided on the inner walls of the wellbore and the well chamber.

[0012] Preferably, the top cover of the shaft is provided with a manhole cover, and a ventilation hole is penetrated through the manhole cover.

[0013] Preferably, a chamfered structure is provided on the top of the water retaining wall close to the water outlet chamber.

[0014] Preferably, a water outlet concrete cushion layer is laid on the bottom surface of the water outlet chamber, and the top of the water outlet concrete cushion layer is flush with the bottom end of the gravity drainage pipe.

[0015] Preferably, a first waterproof casing is provided between the pressure drainage pipe and the water inlet, and a second waterproof casing is provided between the gravity drainage pipe and the water outlet.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model provides a multi-stage energy dissipation well of a pressure flow drainage pipeline. When water flows through a pebble layer, it can dissipate energy. At the same time, a water-holding layer can be formed above the pebble layer. The water-holding layer can also dissipate energy for the water flow. The retaining wall can dissipate energy by overflowing water. The water discharged from the drainage hole collides with the water overflowing from the water retaining wall to dissipate energy, thereby achieving multi-stage energy dissipation, reducing the impact of water flow on the water retaining wall, and improving the spatial utilization efficiency of energy dissipation facilities. The setting of the water inlet concrete cushion layer can avoid direct contact between the pebble layer and the bottom plate of the well chamber, which not only strengthens the basic structure of the water inlet chamber, but also reduces the impact of water flow through the pebble layer on the bottom plate. The setting of the drainage hole can also automatically discharge the residual water in the water inlet chamber, avoiding many adverse factors caused by the long-term accumulation of a large amount of water in the water inlet chamber, such as accelerating the damage of facilities such as the water retaining wall.

[0018] 2. The utility model provides a multi-stage energy dissipation well for a pressure flow drainage pipeline, in which ventilation holes are arranged on the well cover, thereby avoiding the risk of bubbles accumulating due to the impact of water flow in the well chamber and being unable to be discharged in time.

[0019] 3. The utility model provides a multi-stage energy dissipation well for a pressure flow drainage pipeline. By setting two wellbores, it is convenient for workers to go down to the corresponding water inlet chamber or water outlet chamber, avoiding the phenomenon that the workers need to climb the retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the front view structure of a multi-stage energy dissipation well of a pressure flow drainage pipeline provided by an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the side structure of a multi-stage energy dissipation well of a pressure flow drainage pipeline provided by an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the top view of a multi-stage energy dissipation well of a pressure flow drainage pipeline provided in an embodiment of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Well chamber; 2. Ladder; 3. First waterproof casing; 4. Pressure drainage pipe; 5. Elbow 6. Vertical pipe; 7. Pebble layer; 8. Retaining wall; 9. Water inlet concrete cushion; 10. Manhole; 11. Well shaft; 12. Gravity drainage pipe; 13. Vent; 14. Water inlet chamber; 15. Water outlet chamber; 16. Water outlet concrete cushion; 17. Well cover; 18. Drainage hole; 19. Second waterproof casing. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with specific embodiments so that those skilled in the art can understand the present invention more clearly.

[0026] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0027] like Figure 1-3 As shown, this embodiment provides a multi-stage energy dissipation well for a pressure flow drainage pipeline, including a well chamber 1, a riser 6, and a retaining wall 8;

[0028] The retaining wall 8 is vertically fixed in the well chamber 1, and the retaining wall 8 divides the bottom of the well chamber 1 into an inlet chamber 14 and an outlet chamber 15. A water inlet adapted to the pressure drainage pipe 4 is provided on one side wall of the well chamber 1, and the pressure drainage pipe 4 is inserted in the water inlet. The riser 6 is vertically arranged above the inlet chamber 14, and one end of the pressure drainage pipe 4 located in the well chamber 1 is connected to the top of the riser 6 through an elbow 5. The bottom surface of the inlet chamber 14 is paved with an inlet concrete cushion layer 9. The inlet concrete cushion layer 9 is provided on the bottom surface of the well chamber 14. A pebble layer 7 is laid on the cushion layer 9, and the projection of the riser 6 on the pebble layer 7 is located at the center of the upper surface of the pebble layer 7. A horizontally arranged drainage hole 18 is penetrated through the side wall of the retaining wall 8, and the bottom end of the drainage hole 18 is flush with the top of the water inlet concrete cushion layer 9. A water outlet compatible with the gravity drainage pipe 12 is provided on the side wall of the water outlet chamber 15, and the gravity drainage pipe 12 is inserted into the water outlet, and one end of the gravity drainage pipe 12 located in the water outlet chamber 15 is flush with the inner wall of the water outlet chamber 15.

[0029] In this embodiment, water can enter the elbow 5 through the pressure drainage pipe 4, and then flow downward through the riser 6 into the pebble layer 7. The pebble layer 7 can dissipate energy for the water. At the same time, the water cannot quickly flow out of the water inlet chamber 14, so that the water level gradually rises and forms a water-holding layer above the pebble layer 7. The water-holding layer can also dissipate energy for the water. When the water level in the water inlet chamber 14 rises to the height of the retaining wall 8, it can overflow into the water outlet chamber 15 and perform water drop energy dissipation through the retaining wall 8. At the same time, due to the setting of the drainage hole 18, part of the water can enter the water outlet chamber 15 through the drainage hole 18, and this part of the water will collide with the water overflowing from the retaining wall 8, further dissipating energy, thereby achieving multi-stage energy dissipation, significantly reducing the impact of water flow, and improving the space utilization efficiency of energy dissipation facilities.

[0030] Among them, the setting of the water inlet concrete cushion layer 9 can avoid direct contact between the pebble layer 7 and the bottom plate of the well chamber 1, which not only strengthens the basic structure of the water inlet chamber 14, but also reduces the impact of water flow through the pebble layer 7 on the bottom plate. Moreover, the water inlet concrete cushion layer 9 improves the position of the drainage hole 18, so that the water flow discharged through the drainage hole 18 can contact and collide with the overflowing water before it falls to the ground, thereby performing effective energy dissipation treatment.

[0031] Among them, the setting of the drainage hole 18 can also discharge the residual water in the water inlet chamber 14, so as to avoid a large amount of water being accumulated in the water inlet chamber 14 for a long time when the energy dissipation well is not used or maintenance is carried out, which may bring many adverse factors, such as inconvenience in maintenance, or accelerate damage to facilities such as the retaining wall 8.

[0032] In this embodiment, a plurality of drainage holes 18 are provided on the side wall of the water retaining wall 8, and the plurality of drainage holes 18 are evenly spaced in the horizontal direction, so that the water flow discharged through the drainage holes 18 is more uniform. The top surface of the water inlet concrete cushion layer 9 can be inclined, and the side of the water inlet concrete cushion layer 9 away from the drainage holes 18 is at a higher position, and the other side is at a lower position, so as to quickly discharge the residual water in the water inlet chamber 14.

[0033] In this embodiment, the well chamber 1 is buried below the ground, and two manholes 10 are opened on the top plate of the well chamber 1. The two manholes 10 are respectively located above the water inlet chamber 14 and the water outlet chamber 15. Two well shafts 11 are arranged above the well chamber 1. The bottom ends of the two well shafts 11 are respectively connected to the two manholes 10, and the top ends of the two well shafts 11 extend to the ground.

[0034] A ladder 2 is provided on the inner walls of the two shafts 11 , and a ladder 2 is also provided on the inner wall of the well chamber 1 corresponding to the lower position of the two shafts 11 .

[0035] In this way, the staff can enter the well chamber 1 through the well shaft 11. Moreover, by providing two well shafts 11, the staff can directly go down to the corresponding water inlet chamber 14 or the water outlet chamber 15, avoiding the phenomenon that the staff need to climb the retaining wall to cross to another chamber.

[0036] When water flows into the pebble layer 7, the retaining wall 8 or the water-intake concrete cushion 9, bubbles will be formed. In order to discharge these bubbles smoothly, in this embodiment, the top cover of the well 11 is provided with a well cover 17, and the well cover 17 is provided with a vent hole 13. For example, Figure 3 As shown, nine ventilation holes 13 are provided through the manhole cover 17, and the nine ventilation holes 13 are distributed in a matrix. The diameter of the ventilation holes 13 may be 2 cm, so that the ventilation holes 13 can smoothly discharge the accumulated bubbles.

[0037] In this embodiment, a chamfered structure is provided on the top of the water retaining wall 8 near the water outlet chamber 15. The chamfered structure can play a certain guiding role on the water flow.

[0038] In this embodiment, a water outlet concrete cushion layer 16 is laid on the inner bottom surface of the water outlet chamber 15, and the top of the water outlet concrete cushion layer 16 is flush with the bottom end of the gravity drainage pipe 12. On the one hand, the water outlet concrete cushion layer 16 can protect the inner bottom plate of the water outlet chamber 15 to prevent the water flow from directly impacting the inner bottom plate of the water outlet chamber 15, and on the other hand, the water outlet concrete cushion layer 16 can prevent water from remaining at the inner bottom of the water outlet chamber 15.

[0039] In this embodiment, a first waterproof sleeve 3 is provided between the pressure drainage pipe 4 and the water inlet, and a second waterproof sleeve 19 is provided between the gravity drainage pipe 12 and the water outlet. The provision of the first waterproof sleeve 3 and the second waterproof sleeve 19 can prevent water from penetrating to the outside of the well chamber 1.

[0040] The mechanisms, components and parts not specifically described in the present invention are all existing structures in the prior art and can be directly purchased from the market.

[0041] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0042] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-stage energy dissipation well for a pressure flow drainage pipeline, characterized in that: It comprises a well chamber (1), a riser (6), and a water retaining wall (8); The water retaining wall (8) is vertically fixed in the well chamber (1), and the water retaining wall (8) divides the bottom of the well chamber (1) into a water inlet chamber (14) and a water outlet chamber (15). A water inlet matched with the pressure drainage pipe (4) is provided on the side wall of the well chamber (1), and the pressure drainage pipe (4) is inserted into the water inlet. The standpipe (6) is vertically arranged above the water inlet chamber (14), and the inner end of the pressure drainage pipe (4) is connected to the top end of the standpipe (6). The water inlet chamber (14) is connected to the water supply chamber (15), the bottom surface of which is paved with a water inlet concrete cushion layer (9), a pebble layer (7) is paved on the water inlet concrete cushion layer (9), a horizontally arranged drainage hole (18) is penetrated through the side wall of the water retaining wall (8), the bottom end of the drainage hole (18) is flush with the top end of the water inlet concrete cushion layer (9), and a water outlet adapted to the gravity drainage pipe (12) is provided on the side wall of the water outlet chamber (15), and the gravity drainage pipe (12) is inserted into the water outlet.

2. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 1, characterized in that: A plurality of drainage holes (18) are provided on the side wall of the water retaining wall (8), and the plurality of drainage holes (18) are evenly spaced.

3. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 1, characterized in that: The projection of the vertical pipe (6) on the pebble layer (7) is located at the center of the upper surface of the pebble layer (7).

4. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 1, characterized in that: The well chamber (1) is buried under the ground, a manhole (10) is provided on the top plate of the well chamber (1), a well shaft (11) is provided above the well chamber (1), the bottom end of the well shaft (11) is connected to the manhole (10), and the top end of the well shaft (11) extends to the ground.

5. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 4, characterized in that: Two manholes (10) are provided on the top plate of the well chamber (1), and the two manholes (10) are respectively located above the water inlet chamber (14) and the water outlet chamber (15). Two well shafts (11) are provided above the well chamber (1), and the bottom ends of the two well shafts (11) are respectively connected to the two manholes (10), and the top ends of the two well shafts (11) extend to the ground.

6. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 4, characterized in that: Ladders (2) are provided on the inner walls of the wellbore (11) and the well chamber (1).

7. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 4, characterized in that: The top end of the wellbore (11) is provided with a well cover (17), and a vent hole (13) is penetrated through the well cover (17).

8. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 1, characterized in that: A chamfered structure is provided on one side of the top of the water retaining wall (8) close to the water outlet chamber (15).

9. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 1, characterized in that: The inner bottom surface of the water outlet chamber (15) is paved with a water outlet concrete cushion layer (16), and the top end of the water outlet concrete cushion layer (16) is flush with the bottom end of the gravity drainage pipe (12).

10. A multi-stage energy dissipation well for pressure flow drainage pipeline according to claim 1, characterized in that: A first waterproof sleeve (3) is provided between the pressure drainage pipe (4) and the water inlet, and a second waterproof sleeve (19) is provided between the gravity drainage pipe (12) and the water outlet.

Images