CN215830555U - Tunnel underground interval negative pressure drainage system - Google Patents
Tunnel underground interval negative pressure drainage system Download PDFInfo
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- CN215830555U CN215830555U CN202122536711.9U CN202122536711U CN215830555U CN 215830555 U CN215830555 U CN 215830555U CN 202122536711 U CN202122536711 U CN 202122536711U CN 215830555 U CN215830555 U CN 215830555U
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Abstract
The utility model is suitable for the field of drainage of underground sections of tunnels, and provides a negative pressure drainage system of the underground sections of the tunnels, which comprises an electric cabinet and at least two drainage pipelines, wherein at least one of the drainage pipelines is used mainly, at least one of the drainage pipelines is used for standby, the output ends of all the drainage pipelines are commonly connected with a pressure output pipe, the tail end of the pressure output pipe is used for being connected to a drainage pipe network through a valve, the drainage pipeline comprises a rotor pump, the water inlet of the rotor pump is connected with a water suction pipe extending into a reservoir, and the electric cabinet is connected with a liquid level float cable extending into the reservoir. The utility model can solve the problems of large flow, high suction lift and high lift drainage and avoid the possibility of blocking a pump head by scaling of water calcium compounds in leakage water according to the close occlusion characteristic of the rotor pump, the rotor pump arranged above the reservoir is convenient to overhaul and maintain, the reliability of the main and standby rotor pump systems is high, and meanwhile, the fault rate of the system is further reduced by the control mode of the electric cabinet and the liquid level floating ball, and the stable and effective drainage control can be realized.
Description
Technical Field
The utility model belongs to the field of drainage of underground sections of tunnels, and particularly relates to a negative pressure drainage system of an underground section of a tunnel.
Background
The tunnel underground interval pump room is a traditional gravity flow drainage scheme at present, namely a plurality of groups of submersible pumps and floating ball liquid level control are arranged in a reservoir, construction is mostly carried out by a freezing method, the civil engineering cost is high, the construction period is long, other construction periods are seriously influenced, high-lift submersible pumps with 30-60 tons of flow and 40-80 meters of lift are generally needed, products which can be selected by high-flow and high-lift submersible pumps at home and abroad at present are few, and the trouble that a gravity flow pipeline or even a pump head impeller is blocked by deposition and scaling of calcifications in leakage water after the pump room is put into operation is often caused.
For the interval pump house with deeper position, in order to solve the problem of high lift of the submersible pump, a buffer pool is generally required to be arranged at a certain height position above the interval pump house, and then a group of submersible pumps are arranged to realize secondary lifting. However, this solution significantly increases the material, construction and maintenance costs and also increases the system failure rate.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention provides a negative pressure drainage system for underground sections of tunnels, which aims to solve the above technical problems.
The utility model adopts the following technical scheme:
the negative pressure drainage system between tunnel underground section, including being located the tunnel underground section's cistern, the intercommunication has the gravity drain pipe between cistern and the tunnel escape canal bottom, negative pressure drainage system includes electric cabinet, two at least way drain pipe way, and wherein at least all the way is main use, and at least all the way is reserve, and all drain pipe way's output is connected with the pressure output tube jointly, the end of pressure output tube is used for being connected to the drainage pipe network through the valve, drain pipe includes a rotor pump, and the water inlet of rotor pump is connected with the pipe that absorbs water that stretches into to the cistern in, the electric cabinet is connected with the liquid level floater cable that stretches into to the cistern in.
Furthermore, the liquid level floating ball cable is provided with a starting liquid level sensor and a stopping liquid level sensor at different heights.
Furthermore, rubber connectors are further arranged at two ends of the rotor pump, and the rubber soft connectors are used for blocking vibration generated during operation of the rotor pump of the pump from being transmitted to the drainage pipeline to cause resonance.
Furthermore, a check valve and a control valve are further arranged on a water outlet pipeline of the rotor pump, and the control valve is used for guiding water in a drainage pipeline to the water storage tank and overhauling when the pump is stopped.
Furthermore, a flexible waterproof sleeve is arranged between the water drainage pipe and the reservoir.
Further, the space above the reservoir is a pump room, and a fireproof door is arranged between the pump room and the adjacent tunnel.
Furthermore, an overhaul well is arranged above the pump room, and the pressure output pipe penetrates through the overhaul well and then is connected to a drainage pipe network.
The utility model has the beneficial effects that: on one hand, the system of the utility model is provided with the rotor pump to replace the existing submersible pump, the pump outlet of the rotor pump has high lift, and the types of products with selectable flow lift are more, so that the water discharge problems of high flow, high suction lift and high lift (the lift is more than 50 meters) can be solved by the primary rotor pump, and the possibility of blocking the pump head by scaling of water calcification due to water leakage can be avoided due to the close occlusion rotation of the low-rotating-speed rotor of the rotor pump; on the other hand, the rotor pump is not positioned in the water storage tank and is arranged above the water storage tank in a dry mode, so that the construction and maintenance are convenient, and the overhaul cost is low; in the third aspect, the utility model adopts the form of the main and standby rotor pumps, thereby ensuring the reliability of the system and avoiding safety accidents; in addition, the control mode of the electric cabinet and the liquid level cable adopted by the utility model further reduces the system failure rate and can realize accurate drainage control.
Drawings
Fig. 1 is a structural diagram of a negative pressure drainage system between underground sections of a tunnel according to an embodiment of the utility model.
Fig. 2 is a structural view of the main drain line and the auxiliary drain line of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 shows the structure of a negative pressure drainage system between underground sections of a tunnel provided by an embodiment of the utility model, and only the parts related to the embodiment of the utility model are shown for convenience of description.
The negative pressure drainage system is suitable for underground tunnel parts of various urban subways and intercity railways. As shown in fig. 1, the negative pressure drainage system between the underground sections of the tunnel provided by this embodiment includes a reservoir 1 located between the underground sections of the tunnel, a gravity drainage pipe 2 is communicated between the reservoir 1 and the bottom of the tunnel drainage ditch a, the negative pressure drainage system further includes an electric cabinet 8 and at least two drainage pipelines, wherein one of the drainage pipelines is a main drainage pipeline 3, at least one of the drainage pipelines is a standby drainage pipeline 4, the output ends of the main and standby drainage pipelines are connected with a pressure output pipe 5, and the end of the pressure output pipe 5 is connected to a municipal drainage pipe network through a valve.
As shown in fig. 2, the drainage pipelines each include a rotor pump 61, the water inlet of the rotor pump 61 is connected with a water suction pipe 7 extending into the reservoir, the electric cabinet 8 is connected with a liquid level float cable 9 extending into the reservoir 1, and the liquid level float cable has a start liquid level sensor 91 and a stop liquid level sensor 92 in the height direction.
In this embodiment, tunnel underground is the underground between two adjacent websites in the interval, and the tunnel intermediate position between two websites is the lowest position generally, sets up the pump house in this position, and the percolating water in tunnel and station sparge water can the natural flow direction lowest position, through at tunnel escape canal lowest point and the pre-buried drain pipe of cistern, water can be along the drain pipe flow direction cistern. Further, a flexible waterproof sleeve 15 is arranged between the gravity drainage pipe 2 and the reservoir 1 in the figure, so that soil is prevented from entering the reservoir.
The number of the main and standby drainage pipelines is not limited in this embodiment, and may be set appropriately according to the actual project type, drainage requirements, and the like, for example, in a common case, it is only necessary to have one main and one standby. And for intercity railways, two purposes and one standby can be adopted, so that the fault rate is reduced. In addition, all the drainage pipelines have the same function and can be mutually used as a main and a standby, the specific path is not limited to be the main path and the standby path, and the switching can be set according to the work.
In fig. 2, the both ends of rotor pump 61 are rubber connector 62 in addition, the rubber connector has certain elastic connection performance, and the rotor pump has certain vibrations at the during operation, can cushion vibrations through the rubber connector, guarantees the stability of rotor pump place pipeline, and vibrations that can block when the pump rotor pump operates pass to the water drainage pipeline and arouse resonance. The water outlet pipeline of the rotor pump 61 is also provided with a check valve 63 and a control valve 64. The check valve is used for preventing pumped water from flowing into the reservoir, and the control valve is used for guiding water in the drainage pipeline to the reservoir and overhauling the water when the pump is stopped.
When the pump stopping liquid level sensor 92 is used for detecting the water level in the reservoir, when the starting liquid level sensor detects that the water level reaches the position, a signal is sent to the electric cabinet, and the electric cabinet controls the start of the control valve and the rotor pump; after the water level drops to the position of the pump stopping liquid level sensor, the pump stopping liquid level sensor outputs a signal to the electric cabinet, and the electric cabinet controls the closing of the control valve and the rotor pump, so that the water in the reservoir is timely, quickly and accurately discharged.
In the figure, 1 top space in cistern is the pump house, be equipped with between pump house and the adjacent tunnel and prevent fire door 10, the maintainer overhauls and maintains in the pump house, if the pump house accident appears, the maintainer can get into the tunnel and close and prevent fire door through preventing fire door, ensures not to appear great incident.
In addition, there is the inspection shaft 11 pump house top, pressure output tube 5 passes behind the inspection shaft is connected to municipal drainage pipe network. The pressure output pipe 5 can be overhauled to a certain extent in the manhole, and does not need to enter a pump room, so that the working efficiency is also improved.
In conclusion, the utility model adopts the scheme of the rotor pump set, and the rotor pump rotates through the two rotors which are mutually meshed and sealed, so that negative pressure suction is generated at the inlet and positive pressure is generated at the outlet for working. The self-suction capacity of the inlet of the rotor pump can reach 9 meters, the outlet lift can reach more than one hundred meters, and various types of products with selectable flow lifts are more. The low-speed rotor of the rotor pump is meshed and rotates, so that the possibility that the pump head is blocked by the scale of the water-leaking calcification is avoided. In addition, the starting and stopping of the rotor pump are controlled by arranging the liquid level sensor, the water column flows at high speed in the pipeline in a piston mode, the surrounding pipe walls are scoured, and calcification deposition scaling blockage in leakage water can be well avoided. And the rotor pump is not located the cistern to the dry-type is installed in the cistern top, is convenient for be under construction and maintain, and the cost of overhaul is also lower.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides an interval negative pressure drainage system in tunnel underground, is including being located the interval cistern in tunnel underground, the intercommunication has gravity drain pipe between cistern and the tunnel escape canal bottom, its characterized in that, negative pressure drainage system includes electric cabinet, two at least water drainage pipeline, wherein is used for mainly all the way at least, and at least all the way is reserve, and all water drainage pipeline's output is connected with pressure output tube jointly, pressure output tube's end is used for being connected to water drainage pipe network through the valve, water drainage pipeline includes a rotor pump, and the water inlet of rotor pump is connected with the pipe that absorbs water that stretches into to the cistern in, the electric cabinet is connected with the liquid level floater cable that stretches into to the cistern in.
2. The negative pressure drainage system in the underground space of the tunnel according to claim 1, wherein the liquid level float ball cable has a start liquid level sensor and a stop liquid level sensor at different heights.
3. The negative pressure drainage system in the underground space of the tunnel according to claim 2, wherein the rotor pump is further provided with soft rubber joints at both ends thereof, and the soft rubber joints are used for blocking vibration generated during operation of the rotor pump of the pump from being transmitted to the drainage pipeline to cause resonance.
4. The negative pressure drainage system for underground sections of tunnels according to claim 3, wherein the outlet pipeline of the rotory pump is further provided with a check valve and a control valve, and the control valve is used for guiding water in the drainage pipeline to a reservoir and performing maintenance when the pump is stopped.
5. The system of claim 4, wherein a flexible waterproof sleeve is disposed between the drain pipe and the reservoir.
6. The negative pressure drainage system between underground sections of tunnels according to claim 5, wherein the space above the water reservoir is a pump room, and a fire door is arranged between the pump room and the adjacent tunnel.
7. The system of claim 6, wherein the pump house has an access well above it, and the pressure output pipe passes through the access well and is connected to a drainage pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122536711.9U CN215830555U (en) | 2021-10-21 | 2021-10-21 | Tunnel underground interval negative pressure drainage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122536711.9U CN215830555U (en) | 2021-10-21 | 2021-10-21 | Tunnel underground interval negative pressure drainage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215830555U true CN215830555U (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122536711.9U Active CN215830555U (en) | 2021-10-21 | 2021-10-21 | Tunnel underground interval negative pressure drainage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215830555U (en) |
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2021
- 2021-10-21 CN CN202122536711.9U patent/CN215830555U/en active Active
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