Deep tunnel model measurement and control system based on variable frequency closed-loop control

Abstract

The present invention discloses a deep tunnel model measurement and control system based on variable frequency closed-loop control, which includes: a plurality of containers, each of which is spaced apart; two adjacent containers are connected by a first pipe; each first pipe is provided with a corresponding flood discharge pump; each flood discharge pump is provided with a corresponding frequency converter to control the flood discharge driving force of the flood discharge pump; the plurality of containers form multiple inlets; a flow monitoring device is provided on each first pipe segment located in the direction of the flood discharge outlet of the flood discharge pump, for monitoring the outflow of the corresponding segment of the first pipe; a plurality of pressure monitoring devices are provided for monitoring water pressure; a control unit is used to receive information on the outflow flow and outflow water pressure of the first pipe, and to control the frequency of the frequency converter based on the information on the outflow flow and outflow water pressure of the first pipe. The system can be widely applied to the field of physical model technology for deep tunnels.

Description

Technical Field

[0001] The present invention relates to the technical field of physical models of deep tunnels, and more particularly to a deep tunnel model measurement and control system based on variable frequency closed-loop control. Background Art

[0002] The application technology of deep tunnels is relatively blank in domestic applications, especially the monitoring technology of water flow status in deep tunnels. No practical and effective solutions have been proposed. The drainage system of deep tunnels has multiple inflows, and the water flows into the main tunnel through the vertical shaft with a large drop and complex hydrodynamic characteristics. It is particularly difficult to monitor the water flow environment inside deep tunnels, including water flow and water pressure. There is a necessary need for demonstration in terms of flow capacity, water flow state, pressure distribution, exhaust effect, siltation, and scouring effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a deep tunnel model measurement and control system based on variable frequency closed-loop control for simulating an underground deep tunnel environment.

[0004] In order to achieve these objectives and other advantages according to the present invention, a deep tunnel model measurement and control system based on variable frequency closed-loop control is provided, which includes:

[0005] A plurality of containers are arranged at intervals; two adjacent containers are connected via a first pipe; each first pipe is provided with a corresponding flood discharge pump; each flood discharge pump is provided with a corresponding frequency converter to control the flood discharge driving force of the flood discharge pump;

[0006] wherein a plurality of the containers are connected to a plurality of the first pipes to form a linear deep model, and a plurality of inlets are respectively provided at positions of the plurality of containers distributed on the linear deep model;

[0007] A flow monitoring device is provided on each section of the first pipeline located in the direction of the flood discharge outlet of the flood discharge pump, for monitoring the outflow of the corresponding section of the first pipeline;

[0008] A plurality of pressure monitoring devices, which are respectively provided on each segment of the deep model and are used to monitor water pressure;

[0009] A control unit is respectively connected to several of the flow monitoring devices and the pressure monitoring devices, and is used to receive the outflow flow information and outflow water pressure information of the first pipeline, and control the frequency of the inverter according to the outflow flow information and outflow water pressure information of the first pipeline.

[0010] Preferably, a plurality of water inlet segments are provided at the inlet, one end of each water inlet segment is connected to the container, and the other end is connected to the first pipe, and the water inlet segment includes:

[0011] The first water inlet is used to introduce and temporarily store a fixed amount of water, and includes:

[0012] First fore pool;

[0013] a first rear pool, separated from the first fore pool by a pool wall, wherein the height of the first rear pool is greater than that of the first fore pool;

[0014] a water inlet valve, arranged at a lower position on the pool wall and connecting the first front pool and the first rear pool;

[0015] a first water outlet, configured to receive water from the first water inlet;

[0016] a first water inlet pipe, one end of which is connected to the first rear tank and the other end of which is connected to the first water inlet;

[0017] a first flood discharge pump connected to the first water inlet pipe;

[0018] a first flow monitoring device, which is located on a section of the first water inlet pipe in the direction of the water outlet of the first flood discharge pump;

[0019] The first frequency converter is connected to the first flood drainage pump and controls the flood drainage driving force of the first flood drainage pump.

[0020] Preferably, the pressure sensing device is provided at the bottom of the first forebay for transmitting the water pressure data of the first forebay to the control unit.

[0021] Preferably, the inlet further includes a plurality of vertically arranged branch pipes, and the branch pipes are all connected to the first pipeline.

[0022] Preferably, the sub-management includes:

[0023] The flow guide part is a circle of straight cylinder with a spiral structure on the inner side and is arranged coaxially with the branch pipe.

[0024] Preferably, the length segment of the deep model further includes a plurality of water outlet segments, one end of each of the water outlet segments is connected to an end of the first pipe away from the first back pool, and the water outlet segment includes:

[0025] The second forebay is used to introduce and temporarily store a fixed amount of water, and includes:

[0026] a second rear pool, for receiving water from the second front pool;

[0027] A second water inlet pipe, which is a U-shaped pipe, with two free ends extending into the second front pool and the second rear pool on the corresponding side respectively;

[0028] a second flood discharge pump connected to the middle section of the U-shaped pipe;

[0029] a second flow monitoring device, which is located on the section of the U-shaped pipe in the direction of the water outlet of the second flood discharge pump;

[0030] The second frequency converter is connected to the second flood discharge pump and controls the flood discharge driving force of the second flood discharge pump.

[0031] Preferably, a manual valve is further provided on the second water inlet pipe.

[0032] Preferably, it also includes:

[0033] A plurality of sand settling tanks are respectively arranged to be connected to a plurality of the first pipes.

[0034] Preferably, a bottom support structure is further included, which is supported and arranged at the bottom of the deep model, specifically including:

[0035] A plurality of bases, which are respectively disposed on the bottoms of the plurality of containers;

[0036] A plurality of lifting devices are respectively supported on the bottoms of the plurality of containers and located on the base for adjusting the heights of the containers.

[0037] The measurement and control method of a deep tunnel model measurement and control system based on variable frequency closed-loop control includes the following steps:

[0038] S1. Preset the inlet and outlet flow information of the deep model, where the water flow information includes:

[0039] Water flow pressure, flow rate and water level information;

[0040] S2. Obtain inlet water flow information, process water flow information of the first pipeline, and outlet water flow information of the deep model;

[0041] S3. Compare the outlet water flow information in step S2 with the outflow water flow information in step S1. If the outlet water flow information is inconsistent with the outflow water flow information, control and adjust the process water flow information of the first pipeline until the outlet water flow information is consistent with the outflow water flow information.

[0042] The present invention has at least the following beneficial effects:

[0043] 1. The deep model is reasonably designed. The model is prepared in proportion according to the actual deep underground environment to simulate the water flow conditions in the internal environment of the deep underground tunnel, so that the model analysis of the deep underground environment can be made intuitively.

[0044] 2. The structure is simple, easy to build, and highly practical. It simulates the deep underground environment and inlet through pipes and containers, and sets flood discharge pumps and frequency converters to make the water flow in the model reach the expected design value, thereby being able to observe the influencing factors in the water flow process.

[0045] 3. High measurement accuracy. The water flow pressure and outflow are monitored and controlled by setting flow detection device, pressure monitoring device, frequency conversion device and software control unit.

[0046] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 Schematic diagram of the structure of the deep tunnel model measurement and control system based on variable frequency closed-loop control of the present invention;

[0048] Figure 2 It is a structural schematic diagram of the water inlet section of the present invention;

[0049] Figure 3 This is a schematic diagram of the water outlet segment structure of the present invention;

[0050] Explanation of the reference numerals in the accompanying drawings in the specification: 1. container, 2. first pipeline, 3. water inlet segment, 4. water outlet segment, 5. branch pipe, 6. bottom support, 7. lifting device, 8. first flood discharge pump, 9. first flow detection device, 10. first water outlet, 11. second front pool, 12. second water inlet pipe, 13. second rear pool, 701. first front pool, 702. first rear pool. DETAILED DESCRIPTION

[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0052] In the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] like Figure 1-3 As shown, the deep tunnel model measurement and control system based on variable frequency closed-loop control of the present invention includes:

[0054] A plurality of containers 1 are arranged at intervals; two adjacent containers 1 are connected via a first pipe 2; each first pipe 2 is provided with a corresponding flood discharge pump; each flood discharge pump is provided with a corresponding frequency converter to control the flood discharge driving force of the flood discharge pump;

[0055] Wherein, a plurality of the containers 1 are connected to a plurality of the first pipes 2 to form a linear deep model, and a plurality of the containers 1 are distributed at positions of the linear deep model and a plurality of inlets are respectively provided;

[0056] A flow monitoring device is provided on each section of the first pipeline 2 located in the direction of the flood discharge outlet of the flood discharge pump, for monitoring the outflow of the corresponding section of the first pipeline 2;

[0057] A plurality of pressure monitoring devices, which are respectively provided on each segment of the deep model and are used to monitor water pressure;

[0058] A control unit, which is respectively connected to several of the flow monitoring devices and the pressure monitoring devices, is used to receive the outflow flow information and outflow water pressure information of the first pipeline 2, and control the frequency of the inverter according to the outflow flow information and outflow water pressure information of the first pipeline 2.

[0059] In the above technical solution, the container 1 and the first pipe 2 are both made of transparent materials, so that the water flow inside the pipe can be directly observed from the outside. The height of the pipe segments is designed and arranged in proportion to the section height difference of the underground tunnel, so as to achieve a highly fitting state of the underground tunnel environment.

[0060] The experimental water can be pumped by a water pump. As the water flows gradually in the deep model and water enters multiple inlets, the inflow is not constant, which will be reflected in the form of a curve in the software unit. Multiple flood discharge pumps are set on the segment in the outflow direction of the water level to pump water. First, a pre-set water level threshold is designed. When the water level rises above the threshold, a flood discharge pump is turned on. When the water level gradually rises and a flood discharge pump cannot keep the water level at a constant state and continues to rise, another flood discharge pump is turned on, and so on, until the water level remains in a stable state.

[0061] In another technical solution, a plurality of water inlet segments 3 are provided at the inlet, one end of each water inlet segment 3 is connected to the container 1, and the other end is connected to the first pipe 2, and the water inlet segment 3 includes:

[0062] The first water inlet is used to introduce and temporarily store a fixed amount of water, and includes:

[0063] First forebay 701;

[0064] The first rear pool 702 is separated from the first front pool 701 by a pool wall. The height of the first rear pool 702 is greater than that of the first

[0065] Height of forebay;

[0066] a water inlet valve, provided on the lower portion of the pool wall and connecting the first front pool 701 and the first rear pool;

[0067] A first water outlet 10, for receiving water from the first water inlet;

[0068] a first water inlet pipe, one end of which is connected to the first rear tank 702 and the other end of which is connected to the first water inlet;

[0069] a first flood discharge pump 8, which is connected to the first water inlet pipe;

[0070] a first flow monitoring device 9, which is located on the section of the first water inlet pipe in the direction of the water outlet of the first flood discharge pump 8;

[0071] The first frequency converter is connected to the first flood discharge pump 8 and controls the flood discharge driving force of the first flood discharge pump 8 .

[0072] In the above technical solution, the first fore pool 701 and the first rear pool 702 are separated by a pool wall, and a communicating water inlet valve is provided on the pool wall. During operation, the first fore pool 701 is first filled with experimental water, and then the experimental water in the first fore pool 701 is filled into the first rear pool 702 through the water inlet valve. The water in the first rear pool 702 will maintain a certain steady state and flow back to the first fore pool 701. Then, water is pumped out of the first rear pool 702 through the first water inlet pipe to form a stable water flow environment.

[0073] The flood discharge pump is used to extract water from the first pipe 2, and the amount of water extracted is controlled by the first frequency converter.

[0074] In another technical solution, the pressure sensing device is provided at the bottom of the first forebay 701 for transmitting the water pressure data of the first forebay 701 to the control unit.

[0075] The pressure sensing device may be a waterproof pressure sensor, which is disposed at the bottom of the first forebay 701 to monitor the water pressure in the first forebay 701 and thereby determine the water level.

[0076] In another technical solution, the inlet further includes a plurality of vertically arranged branch pipes 5 , and the branch pipes 5 are all connected to the first pipeline 2 .

[0077] In the above technical solution, the branch pipe 5 can serve as multiple inflow points.

[0078] In another technical solution, the sub-management 5 includes:

[0079] The flow guide portion is a straight cylindrical portion with a spiral structure on the inner side and is coaxially arranged with the branch pipe 5 .

[0080] The guide part can fully resolve the impact generated during vertical inflow, forming surges in the pipeline and causing turbulence in the water environment.

[0081] In another technical solution, the length segment of the deep model further includes a plurality of water outlet segments 4, one end of each of the water outlet segments 4 is connected to an end of the first pipe 2 away from the first back pool 702, and the water outlet segment 4 includes:

[0082] The second forebay 11 is used to introduce and temporarily store a fixed amount of water, and includes:

[0083] a second rear pool 13 for receiving water in the second front pool 11;

[0084] A second water inlet pipe 12, which is a U-shaped pipe, with its two free ends extending into the second front pool 11 and the second rear pool 13 on the corresponding side respectively;

[0085] a second flood discharge pump connected to the middle section of the U-shaped pipe;

[0086] a second flow monitoring device, which is located on the section of the U-shaped pipe in the direction of the water outlet of the second flood discharge pump;

[0087] The second frequency converter is connected to the second flood discharge pump and controls the flood discharge driving force of the second flood discharge pump.

[0088] In another technical solution, a manual valve is further provided on the second water inlet pipe 12 .

[0089] In the above technical solution, the two ends of the U-shaped pipe section are respectively connected to the second front pool 11 and the second rear pool 13. The second rear pool 13 is used to receive the experimental tail water. When the experimental water supply is shut down, there is still accumulated water in the U-shaped pipe section and it will accumulate in the middle part. It will not directly flow into the front pool or the rear pool to affect the pipe section in the deep model.

[0090] In another technical solution, it also includes:

[0091] A plurality of sand settling tanks are respectively arranged to be connected to a plurality of the first pipes 2 .

[0092] In another technical solution, a bottom support 6 structure is further included, which is supported and arranged at the bottom of the deep model, specifically including:

[0093] A plurality of bases, which are respectively disposed at the bottoms of the plurality of containers 1;

[0094] A plurality of lifting devices 7 are respectively supported on the bottoms of the plurality of containers 1 and located on the base for adjusting the height of the containers 1 .

[0095] The lifting device 7 is used to adjust the height of the entire deep model at different sections.

[0096] The measurement and control method of a deep tunnel model measurement and control system based on variable frequency closed-loop control includes the following steps:

[0097] S1. Preset the inlet and outlet flow information of the deep model, where the water flow information includes:

[0098] Water flow pressure, flow rate and water level information;

[0099] S2, obtaining the inlet water flow information of the deep model, the process water flow information of the first pipeline 2, and the outlet water flow information;

[0100] S3. Compare the outlet water flow information in step S2 with the outlet water flow information in step S1. If the outlet water flow information is inconsistent with the outlet water flow information, control and adjust the process water flow information of the first pipe 2 until the outlet water flow information is consistent with the outlet water flow information.

[0101] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A deep tunnel model measurement and control system based on variable frequency closed-loop control, characterized in that: include: A plurality of containers are arranged at intervals; two adjacent containers are connected via a first pipe; each first pipe is provided with a corresponding flood discharge pump; each flood discharge pump is provided with a corresponding frequency converter to control the flood discharge driving force of the flood discharge pump; wherein a plurality of the containers are connected to a plurality of the first pipes to form a linear deep tunnel model, and a plurality of inlets are respectively provided at positions of the plurality of containers distributed along the linear deep tunnel model; A flow monitoring device is provided on each section of the first pipeline located in the direction of the flood discharge outlet of the flood discharge pump, for monitoring the outflow of the corresponding section of the first pipeline; A plurality of pressure monitoring devices, which are respectively arranged on each segment of the deep tunnel model and are used to monitor water pressure; a control unit, connected to the plurality of flow monitoring devices and the pressure monitoring devices, respectively, for receiving information on the outflow flow and the outflow water pressure of the first pipe, and controlling the frequency of the frequency converter according to the information on the outflow flow and the outflow water pressure of the first pipe; The bottom support structure is supported and arranged at the bottom of the deep tunnel model, and specifically includes: a plurality of bases, which are respectively arranged at the bottoms of the plurality of containers; a plurality of lifting devices, which are respectively supported at the bottoms of the plurality of containers and are located on the bases for adjusting the height of the containers.

2. The deep tunnel model measurement and control system based on variable frequency closed-loop control according to claim 1 is characterized in that: The inlet is provided with a plurality of water inlet segments, one end of each of the water inlet segments is connected to the container, and the other end is connected to the first pipe, and the water inlet segment includes: The first water inlet is used to introduce and temporarily store a fixed amount of water, and includes: First fore pool; The first rear pool is separated from the first front pool by a pool wall, and the height of the first rear pool is greater than that of the first Height of forebay; The water inlet valve is arranged on the lower part of the pool wall and connects the first front pool and the first rear pool. pool; a first water outlet, configured to receive water from the first water inlet; a first water inlet pipe, one end of which is connected to the first rear tank and the other end of which is connected to the first water inlet; a first flood discharge pump connected to the first water inlet pipe; a first flow monitoring device, which is located on a section of the first water inlet pipe in the direction of the water outlet of the first flood discharge pump; The first frequency converter is connected to the first flood drainage pump and controls the flood drainage driving force of the first flood drainage pump.

3. The deep tunnel model measurement and control system based on variable frequency closed-loop control according to claim 2 is characterized in that: A pressure sensing device is provided at the bottom of the first forebay for transmitting water pressure data of the first forebay to the control unit.

4. The deep tunnel model measurement and control system based on variable frequency closed-loop control according to claim 1 is characterized in that: The inlet further includes a plurality of vertically arranged branch pipes, and the branch pipes are all connected to the first pipeline.

5. The deep tunnel model measurement and control system based on variable frequency closed-loop control according to claim 4 is characterized in that: The responsibilities include: The flow guide part is a circle of straight cylinder with a spiral structure on the inner side and is arranged coaxially with the branch pipe.

6. The deep tunnel model measurement and control system based on variable frequency closed-loop control according to claim 2 is characterized in that: The length segment of the deep tunnel model further includes a plurality of water outlet segments, one end of each of which is connected to an end of the first pipe away from the first back pool, and the water outlet segment includes: The second forebay is used to introduce and temporarily store a fixed amount of water, and includes: a second rear pool, for receiving water from the second front pool; A second water inlet pipe, which is a U-shaped pipe, with two free ends extending into the second front pool and the second rear pool on the corresponding side respectively; a second flood discharge pump connected to the middle section of the U-shaped pipe; a second flow monitoring device, which is located on the section of the U-shaped pipe in the direction of the water outlet of the second flood discharge pump; The second frequency converter is connected to the second flood discharge pump and controls the flood discharge driving force of the second flood discharge pump.

7. The deep tunnel model measurement and control system based on variable frequency closed-loop control according to claim 6 is characterized in that: The second water inlet pipe is also provided with a manual valve.

8. The deep tunnel model measurement and control system based on variable frequency closed-loop control according to claim 1 is characterized in that: Also includes: A plurality of sand settling tanks are respectively arranged to be connected to a plurality of the first pipes.

9. The measurement and control method of a deep tunnel model measurement and control system based on variable frequency closed-loop control according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Preset the inlet and outlet flow information of the deep tunnel model, where the water flow information includes: Water flow pressure, flow rate and water level information; S2. Obtaining inlet water flow information, process water flow information of the first pipeline, and outlet water flow information of the deep tunnel model; S3. Compare the outlet water flow information in step S2 with the outflow water flow information in step S1. If the outlet water flow information is inconsistent with the outflow water flow information, control and adjust the process water flow information of the first pipeline until the outlet water flow information is consistent with the outflow water flow information.

Images