Rainwater and sewage regulation and storage vertical shaft with slag and sand removal function

Abstract

The rain sewage regulation and storage vertical shaft with the deslagging and desanding functions comprises a pretreatment well chamber, a regulation and storage vertical shaft body and a drainage tunnel, a grit chamber is arranged in the pretreatment well chamber, and a water blocking weir is arranged at an inlet of the grit chamber. According to the utility model, the diversion effect of the diversion water-blocking weir is arranged in the pretreatment well chamber, the introduced sewage is divided into bypasses along the two sides of the water-blocking weir, so that an obvious slow flow area is formed behind the water-blocking weir, and the bypasses on the two sides of the water-blocking weir and the rear slow flow can form local circulation due to flow velocity difference and fluid viscosity; floating garbage or mud and sand in a streaming area with high flow speed are effectively driven to a slow flow area behind the water blocking weir, and under the action of gravity, the floating garbage can be intercepted on the surface by the horizontal grating; and mud and sand can enter the grit chamber through the grating. And the V-shaped grating can effectively prevent the problem that the trapped garbage on the surface of the horizontal grating is resuspended and flushed into a downstream regulation and storage vertical shaft chamber after the liquid level in the shaft chamber rises due to the increase of the water inlet flow.

Description

Technical Field

[0001] The utility model relates to a process structure of a rainwater and sewage discharge pipe network system, in particular to a rainwater and sewage storage shaft with slag and sand removal functions. Background Art

[0002] In recent years, in order to strengthen the control of rainwater runoff pollution and combined sewer overflow pollution, the construction of rainwater and sewage pipe network interception system has become an effective measure. However, due to the limitation of the transfer capacity of the newly built interception system or the capacity of the downstream rainwater and sewage treatment station, it is still impossible to discharge all the intercepted rainwater and sewage into natural water bodies after treatment. Therefore, improving the storage and transfer capacity of the interception system is the key to solving the above problems.

[0003] Although increasing the diameter of sewage interception pipes and building new storage facilities can achieve the above goals, in areas with a high degree of urban construction, the above facilities are often built at a deep location below 20m above the ground to avoid affecting or damaging the original municipal pipe network system with a shallow burial depth. These deep facilities must be connected to the shallow pipe network system through waterfall structures. During the fall process, in order to avoid the impact of water flow on deep structures, energy reduction measures need to be taken to consume the kinetic energy of the water flow; at the same time, high-speed water flow is prevented from bringing garbage and gravel into deep facilities.

[0004] Although the vertical waterfall shafts in Chinese patents CN217325707U and CN210658617U use different methods to achieve the waterfall energy dissipation effect, it is impossible to prevent garbage and gravel in the incoming rainwater and sewage from entering the deep pipes; and there is a lack of consideration on how to ensure the stable operation of the waterfall energy dissipation facilities when the inflow volume fluctuates greatly. Utility Model Content

[0005] The utility model provides a rainwater and sewage storage shaft with slag and sand removal functions to solve the problems in existing waterfall shafts that large inflow fluctuations lead to poor operating stability and sewage and garbage are easily introduced, resulting in high operation and maintenance frequency.

[0006] According to one aspect of the utility model, a rainwater and sewage regulating and storing shaft with slag and sand removing functions is provided, comprising a pre-treatment well chamber, a regulating and storing shaft and a drainage tunnel, a grit chamber is arranged in the pre-treatment well chamber, a water blocking weir is arranged at the entrance of the grit chamber, a horizontal grille is arranged at the upper part of the grit chamber, a V-shaped grille is arranged at the output end of the grit chamber, a partition is arranged between the grit chamber and the regulating and storing shaft, an overflow hole is arranged at the upper part of the partition, a drainage riser is installed in the regulating and storing shaft, the inlet of the drainage riser is connected to the grit chamber, and the drainage tunnel is arranged in parallel with the pre-treatment well chamber and is respectively connected with the regulating and storing shaft.

[0007] Preferably, on the basis of the above scheme, energy dissipation folded plates are arranged at intervals in the height direction of the regulating and storage shaft, and adjacent energy dissipation folded plates are arranged in a staggered manner.

[0008] Preferably, based on the above solution, the drainage riser is connected to the upper part of the grit chamber through a ventilation pipe.

[0009] Preferably, based on the above scheme, an energy dissipation pool is provided at the bottom of the regulating and storing shaft, a cyclone water diffuser is installed at the output end of the drainage riser, and the cyclone water diffuser is arranged in the energy dissipation pool, and a partition is provided between the energy dissipation pool and the drainage tunnel.

[0010] Preferably, based on the above scheme, a maintenance ladder is provided in the regulating and storage shaft.

[0011] Preferably, based on the above solution, an inspection port is provided on the pre-treatment well chamber.

[0012] Preferably, based on the above solution, the sand settling tank is further provided with water-blocking support plates at intervals.

[0013] The utility model is a rainwater and sewage storage shaft with the function of removing slag and sand. Through the diversion effect of the diversion water-blocking weir set in the pre-treatment well chamber, the introduced sewage is divided into the bypass flow along the two sides of the water-blocking weir, and thus an obvious slow flow area is formed behind the water-blocking weir. The bypass flow on both sides of the water-blocking weir and the slow flow at the rear will form a local circulation due to the difference in flow velocity and fluid viscosity, effectively driving the floating garbage or mud and sand in the bypass flow area with a faster flow velocity to the slow flow area behind the water-blocking weir. Under the action of gravity, the floating garbage will be intercepted on the surface by the horizontal grille; the mud and sand will enter the sand settling tank through the grille. The V-shaped grille can effectively prevent the increase of the water inlet flow, resulting in the problem that the intercepted garbage on the surface of the horizontal grille is re-suspended and flushed into the downstream storage shaft chamber after the liquid level in the well chamber rises.

[0014] The beneficial effects of the present invention compared with the prior art are:

[0015] 1. Through the horizontal grid, grit chamber and other components in the pre-treatment well chamber, the floating garbage and mud in the incoming rainwater and sewage can be intercepted and treated;

[0016] 2. Through the combined design of drainage risers, ventilation pipes and overflow channels, a stable transfer capacity can be achieved within the system when the inflow of rainwater and sewage fluctuates significantly.

[0017] 3. Through the combination of cyclone diffusers, energy dissipation pools and energy dissipation folding plates, stable energy dissipation efficiency can be achieved in the system when the inflow of rainwater and sewage fluctuates significantly.

[0018] In addition, the system contains no moving mechanical parts and no electrical equipment, so the equipment operation requires no energy and the amount of manual maintenance is significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 It is a cross-sectional stereoscopic schematic diagram of a rainwater and sewage storage shaft;

[0021] Figure 2 It is a cross-sectional stereoscopic schematic diagram of the rainwater and sewage storage shaft from another perspective;

[0022] Figure 3 This is the main view of the rainwater and sewage storage shaft;

[0023] Description of Figure Numbers:

[0024] Shallow inflow pipeline 1, pre-treatment well chamber 2, storage main shaft 3, drainage tunnel 4, inspection channel 5, partition 6, overflow hole 61.

[0025] Pre-treatment well chamber 2, water blocking weir 21, horizontal grille 22, V-shaped grille 23, sand settling tank 24, water blocking support plate 25, inspection port 26, overflow channel 27;

[0026] The main vertical shaft 3, the energy dissipation folding plate 31, the drainage riser 32, the ventilation pipe 33, the cyclone water diffuser 34, the energy dissipation pool 35, the exhaust port 36, and the ventilation port 37;

[0027] Inspection passage 5, ladder 51, inspection opening 26. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0030] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0031] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0035] See also Figure 1 , and combined with Figure 2 and Figure 3 As shown, the utility model is a rainwater and sewage regulating and storing shaft with slag and sand removing functions, comprising a pre-treatment well chamber 22, a regulating and storing shaft 3 and a drainage tunnel 4, wherein the input end of the pre-treatment well chamber 22 is connected to a shallow inflow pipe 1 to introduce sewage, and a grit chamber 24 is arranged in the pre-treatment well chamber 22, a water blocking weir 21 is arranged at the entrance of the grit chamber 24, and a horizontal grille 22 is arranged at the upper part of the grit chamber 24, and a V-shaped grille 23 is arranged at the end of the horizontal grille 22, that is, the output end of the grit chamber 24, a partition 6 is arranged between the grit chamber 24 and the regulating and storing shaft 3, and an overflow hole 61 is arranged on the upper part of the partition 6, a drainage riser 32 is installed in the regulating and storing shaft 3, and the inlet of the drainage riser 32 is connected to the grit chamber 24, the drainage tunnel 4 is arranged in parallel with the pre-treatment well chamber 22, and the drainage tunnel 4 is connected to the regulating and storing shaft 3.

[0036] After the rainwater and sewage are introduced through the shallow inflow pipe 1, they enter the pre-treatment well chamber 22 and are divided into two bypass flows along the two sides of the water blocking weir 21 under the diversion effect of the water blocking weir 21, thus forming an obvious slow flow area behind the water blocking weir 21. The bypass flows on both sides of the water blocking weir 21 and the slow flow at the rear will form local circulations due to the difference in flow velocity and fluid viscosity. These circulations can effectively drive the floating garbage or mud and sand in the bypass flow area with a faster flow velocity to the slow flow area behind the water blocking weir 21. Under the action of gravity, the floating garbage will be intercepted on the surface by the horizontal grille 22; the mud and sand will enter the sand settling tank 24 through the grille.

[0037] The utility model also provides a plurality of water-blocking support plates 25 arranged at intervals in the sand settling tank 24. The water-blocking support plates 25 can further reduce the water flow velocity, promote the sedimentation of gravel, and play a structural support role for the horizontal grid 22. A V-shaped grid 23 is also provided at the end of the horizontal grid 22. This component can effectively prevent the problem that the intercepted garbage on the surface of the horizontal grid 22 is re-suspended and flushed into the downstream storage shaft 3 chamber after the increase of the water inflow and the increase of the liquid level in the well chamber.

[0038] Among them, the drainage riser 32 is connected to the upper part of the grit chamber 24 through the ventilation pipe 33. When the inflow is low, all the rainwater and sewage enter the regulating and storing shaft 3 through the drainage riser 32. The ventilation pipe 33 acts as a breathing valve to ensure the stable discharge of water flow in the drainage riser 32. When the inflow increases and the ventilation pipe 33 of the pre-treatment well chamber 22 is in a submerged state, the drainage riser 32 enters a siphon state, and the discharge capacity can be significantly improved. When the inflow further increases, the rainwater and sewage enter the regulating and storing shaft 3 through the overflow trough, and fall back and forth between the energy dissipation folding plates 31 to the bottom.

[0039] The regulating and storing shaft 3 of the utility model is provided with energy dissipation folding plates 31 at intervals in the height direction, and adjacent energy dissipation folding plates 31 are arranged in a staggered manner. An energy dissipation pool 35 is arranged at the bottom of the regulating and storing shaft 3. A cyclone water diffuser 34 is installed at the output end of the drainage riser 32, and the cyclone water diffuser 34 is arranged in the energy dissipation pool 35. A partition plate 6 is arranged between the energy dissipation pool 35 and the drainage tunnel 4.

[0040] When the water flow treated by the grit chamber 24 enters the drainage riser 32, the rainwater and sewage will be discharged into the energy dissipation pool 35 through the cyclone diffuser 34 after falling to the bottom of the regulating and storage shaft 3. The cyclone diffuser 34 is submerged in the energy dissipation pool 35 and connected to the drainage riser 32 through the tangential water inlet. After entering the water inlet, the falling water flow is divided into two in the horizontal direction to form a vortex, and the water is dispersed through the circular outlets on both sides. Since the cyclone diffuser 34 is submerged in the energy dissipation pool 35, the water dispersion process can significantly improve the efficiency of establishing turbulence in the energy dissipation pool 35, and finally play an energy dissipation role through the mutual collision of turbulence in the pool. The water flow entering the regulating and storage shaft 3 through the overflow channel 27 of the utility model completes most of the energy dissipation effect in the process of colliding with the energy dissipation folding plate 31 and the shaft wall and falling, and finally falls into the energy dissipation pool 35.

[0041] In order to facilitate maintenance, the utility model also provides a maintenance passage 5 on one side of the regulating shaft 3, and a maintenance ladder 51 is provided in the maintenance passage 5, and an exhaust port 36 and a ventilation port 37 are provided on the maintenance passage 5, and an inspection port 26 is provided on the pre-treatment well chamber 22.

[0042] The utility model is a rainwater and sewage storage shaft with the function of removing slag and sand. By setting the diversion weir 21 in the pre-treatment well chamber 22, the introduced sewage is divided into the bypass flow along the two sides of the water blocking weir 21, and thus an obvious slow flow area is formed behind the water blocking weir 21. The bypass flow on both sides of the water blocking weir 21 and the slow flow at the rear will form a local circulation due to the difference in flow velocity and fluid viscosity, effectively driving the floating garbage or mud and sand in the bypass flow area with a faster flow velocity to the slow flow area behind the water blocking weir 21. Under the action of gravity, the floating garbage will be intercepted on the surface by the horizontal grille 22; the mud and sand will enter the sand settling tank 24 through the grille. The V-shaped grille 23 can effectively prevent the increase of the water inlet flow, resulting in the problem that the intercepted garbage on the surface of the horizontal grille 22 is re-suspended and flushed into the downstream storage shaft chamber 3 after the liquid level in the well chamber rises.

[0043] The beneficial effects of the present invention compared with the prior art are:

[0044] 1. Through the horizontal grid 22, the grit chamber 24 and other components in the pre-treatment well chamber 22, the floating garbage and mud and sand in the incoming rainwater and sewage are intercepted and treated;

[0045] 2. Through the combined design of the drainage riser 32, the ventilation pipe 33 and the overflow channel 27, a stable transfer capacity within the system can be achieved when the inflow of rainwater and sewage fluctuates significantly.

[0046] 3. Through the combination of the cyclone diffuser 34, the energy dissipation pool 35 and the energy dissipation folding plate 31, a stable energy dissipation efficiency can be achieved in the system when the inflow of rainwater and sewage fluctuates significantly.

[0047] 4. In addition, the system does not contain any moving mechanical parts or electrical equipment, the equipment does not require energy to operate, and the amount of manual maintenance is significantly reduced.

[0048] Finally, the method of this application is only a preferred implementation scheme 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 should be included in the protection scope of the utility model.

Claims

1. A rainwater and sewage storage shaft with slag and sand removal functions, characterized in that: It includes a pre-treatment well chamber, a regulating and storing shaft and a drainage tunnel. A grit chamber is arranged in the pre-treatment well chamber. A water-blocking weir is arranged at the entrance of the grit chamber, and a horizontal grille is arranged at the upper part of the grit chamber. A V-shaped grille is arranged at the output end of the grit chamber. A partition is arranged between the grit chamber and the regulating and storing shaft, and an overflow hole is arranged on the upper part of the partition. A drainage riser is installed in the regulating and storing shaft, and the inlet of the drainage riser is connected to the grit chamber. The drainage tunnel is arranged in parallel with the pre-treatment well chamber, and the drainage tunnel is connected to the regulating and storing shaft.

2. A rainwater and sewage storage shaft with slag and sand removal functions as claimed in claim 1, characterized in that: The regulating and storage shaft is provided with energy dissipation folding plates at intervals in the height direction, and adjacent energy dissipation folding plates are arranged in a staggered manner.

3. A rainwater and sewage storage shaft with slag and sand removal functions as claimed in claim 1, characterized in that: The drainage riser is communicated with the upper part of the grit chamber through a ventilation pipe.

4. A rainwater and sewage storage shaft with slag and sand removal functions as claimed in claim 1, characterized in that: An energy dissipation pool is arranged at the bottom of the regulating and storing shaft, a cyclone water diffuser is installed at the output end of the drainage riser, and the cyclone water diffuser is arranged in the energy dissipation pool, and a partition is arranged between the energy dissipation pool and the drainage tunnel.

5. A rainwater and sewage storage shaft with slag and sand removal functions as claimed in claim 1, characterized in that: A maintenance ladder is provided in the regulating and storing vertical shaft.

6. A rainwater and sewage storage shaft with slag and sand removal functions as claimed in claim 1, characterized in that: The pre-processing well chamber is provided with an inspection port.

7. A rainwater and sewage storage shaft with slag and sand removal functions as claimed in claim 1, characterized in that: The sand settling tank is also provided with water blocking support plates at intervals.

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