Automatic control system for underground fuel delivery for mine

Abstract

The utility model belongs to the field of automatic control of mining underground fuel oil conveying, and particularly relates to an automatic control system for mining underground fuel oil conveying. The system comprises an upper computer; the earth surface switch is connected with the upper computer; the earth surface PLC control cabinet is connected with the earth surface switch, and the earth surface PLC control cabinet is respectively connected with an earth surface oil storage tank and an earth surface transfer oil tank; the underground switch is connected with the earth surface switch; the underground oil gathering tank PLC control cabinet is connected with the underground switch; the underground oil gathering tank PLC control cabinet is connected with an underground oil gathering tank; the underground oil storage tank PLC control cabinet is connected with the underground switch; the underground oil storage tank PLC control cabinet is connected with an underground oil storage tank; and the oiling machine is connected with the underground switch. According to the utility model, an operator can monitor the whole oil transportation system in real time, and the operation safety of the oil transportation system is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of automatic control of underground fuel transportation for mines, and in particular relates to an automatic control system for underground fuel transportation for mines. Background Art

[0002] Underground mining sites in mines require a large number of transport vehicles and construction machinery. With the increase in mining volume, the consumption of fuel is also increasing. At present, the main method of transporting oil to underground in China is to transport fuel by tank trucks. This method of transporting oil is time-consuming and labor-intensive, and also has great safety hazards. The underground mine oil transportation method in developed countries uses pipelines to transport fuel. Oil storage tanks are built in safe areas on the surface and transported to underground oil storage tanks through pumps and pipelines. Transporting oil underground through pipelines is much more economical and safer than transporting oil by tank trucks. Therefore, designing an underground intelligent oil transportation control system for mining, which is applied to complex underground working conditions, is a technical problem that needs to be solved urgently by technicians in this field. Utility Model Content

[0003] In order to solve the deficiencies of the prior art, the utility model provides an automatic control system for underground fuel transportation in mines, which provides good automatic control functions for underground fuel transportation systems in mines. The operation status signal, alarm signal and fault signal of the entire oil transportation system are transmitted to the local control cabinet through electrical signals, and then transmitted to the operator station of the control center through the control network, so that the operator can monitor the entire oil transportation system in real time and ensure the safe operation of the oil transportation system.

[0004] The technical solution provided by the utility model is as follows:

[0005] An automatic control system for underground fuel transportation in a mine, comprising:

[0006] Host computer;

[0007] A surface switch connected to the host computer;

[0008] A surface PLC control cabinet connected to the surface switch, wherein the surface PLC control cabinet is respectively connected to a surface oil storage tank and a surface transfer oil tank;

[0009] a downhole switch connected to the surface switch;

[0010] A downhole oil collecting tank PLC control cabinet connected to the downhole switch, and the downhole oil collecting tank PLC control cabinet is connected to the downhole oil collecting tank;

[0011] A downhole oil storage tank PLC control cabinet connected to the downhole switch, and the downhole oil storage tank PLC control cabinet is connected to the downhole oil storage tank;

[0012] And a refueling machine connected to the downhole switch.

[0013] In the above technical solution:

[0014] PLC control cabinets are installed in the surface oil storage tank area, underground oil collection tank area (mainly set at the lowest point of the oil transportation system pipeline to collect accident oil) and underground oil storage tank area. Each PLC control cabinet collects the status signals of field instruments and equipment and sends control signals. After being processed by the programmable controller in the cabinet, it is connected to the host computer in the surface control room through the optical fiber network for centralized monitoring. The switch is used to connect the PLC controllers in each area and communicate the field data to the host computer in the control room for centralized monitoring.

[0015] Specifically, the surface oil storage tank includes: a first temperature sensor connected to the surface PLC control cabinet; a first pressure sensor connected to the surface PLC control cabinet; a first liquid level sensor connected to the surface PLC control cabinet; and a first submersible oil pump connected to the surface PLC control cabinet.

[0016] Specifically, the surface transfer oil tank includes: a second temperature sensor connected to the surface PLC control cabinet; a second pressure sensor connected to the surface PLC control cabinet; a second liquid level sensor connected to the surface PLC control cabinet; and a second submersible oil pump connected to the surface PLC control cabinet.

[0017] Furthermore, the surface PLC control cabinet is also connected to a first combustible gas alarm.

[0018] Furthermore, the surface oil storage tank includes a tank body, the surface oil transfer tank includes a tank body, the tank body of the surface oil storage tank is connected to the tank body of the surface oil transfer tank through the first submersible pump, and the surface oil transfer tank is connected to the oil pipeline through the second submersible pump.

[0019] Specifically, the downhole oil collecting tank includes: a third temperature sensor connected to the downhole oil collecting tank PLC control cabinet; a third pressure sensor connected to the downhole oil collecting tank PLC control cabinet; a third liquid level sensor connected to the downhole oil collecting tank PLC control cabinet; and a third submersible pump connected to the downhole oil collecting tank PLC control cabinet.

[0020] Furthermore, the underground oil collecting tank PLC control cabinet is also connected to a second combustible gas alarm.

[0021] Furthermore, the downhole oil collecting tank includes a tank body, the tank body of the downhole oil collecting tank is respectively connected to an accident oil unloading pipe and an accident oil leakage pipe, the accident oil unloading pipe is provided with a first electric regulating valve and a first flow sensor, and the accident oil leakage pipe is provided with a second electric switching valve; the third submersible pump is connected to a quick connector through a pipeline.

[0022] Specifically, the downhole oil storage tank includes: a fourth temperature sensor connected to the downhole oil storage tank PLC control cabinet; a fourth pressure sensor connected to the downhole oil storage tank PLC control cabinet; a fourth liquid level sensor connected to the downhole oil storage tank PLC control cabinet; and a high-pressure plunger pump connected to the downhole oil storage tank PLC control cabinet. The downhole oil storage tank can further be provided with a fourth submersible pump and connected to the downhole oil storage tank PLC control cabinet for further expansion.

[0023] Furthermore, the underground oil storage tank PLC control cabinet is also connected to a third combustible gas alarm.

[0024] Furthermore, the downhole oil storage tank includes a tank body, the tank body of the downhole oil storage tank is connected to the oil delivery pipeline through an oil inlet pipeline, and the oil inlet pipeline is provided with a second flow sensor and a second electric regulating valve; the tank body of the downhole oil storage tank is connected to the oil delivery pipeline through an oil return pipeline, and the oil return pipeline is provided with the high-pressure plunger pump, pressure gauge and third electric switch valve.

[0025] Furthermore, the surface transfer oil tank is connected to the downhole oil collecting tank and the downhole oil storage tank respectively through a deep well oil pipeline, and the deep well oil pipeline is provided with a first electric switch valve at one end connected to the surface transfer oil tank, and the first electric switch valve is connected to the surface PLC control cabinet; the deep well oil pipeline is provided with a fifth pressure sensor at one end connected to the downhole oil storage tank, and the fifth pressure sensor is connected to the downhole oil storage tank PLC control cabinet.

[0026] Furthermore, the high-pressure plunger pump is started, the second electric switch valve is opened, and the high-pressure plunger pump transports fuel oil to the deep well oil pipeline in reverse.

[0027] The high-pressure plunger pump is started or stopped by the downhole PLC control cabinet and can be used for the first oil transportation. The reserved fuel in the downhole storage tank is reversely transported to fill the fuel delivery pipeline. The plunger pump is then stopped from reverse transportation, and the speed of fuel delivery is controlled by the bypass regulating valve to suppress the hazards of high pressure, high flow rate, water hammer effect, etc. in the pipeline caused by the height difference when transporting oil vertically from the surface to the downhole.

[0028] In the above technical solution:

[0029] Temperature, pressure, and liquid level sensors are installed on each oil tank body, and the local PLC collects data such as the temperature, pressure, and liquid level of the oil tank. When the temperature, pressure, and liquid level of the oil tank are abnormal or exceed the alarm setting value, the PLC will send an alarm to the central control room to remind the operator of the risk. The liquid level of the oil tank can also be interlocked with the submersible pump through the PLC. When the liquid level reaches the preset high limit or low limit, the PLC interlocks to start or stop the corresponding submersible pump to achieve the purpose of automatic oil transportation and interlock protection. A flow sensor is installed at the end of the oil pipeline to monitor the flow rate of the terminal pipeline;

[0030] The combustible gas alarm consists of a fixed combustible gas detector and a gas detection alarm controller. The combustible gas detector converts the combustible gas concentration detected by the sensor into an electrical signal, which is transmitted to the local PLC through a cable. The local PLC is connected to the alarm controller. When the gas concentration reaches or exceeds the alarm point set by the alarm controller, the alarm sends an alarm signal and starts external equipment such as ventilation fans to automatically eliminate hidden dangers.

[0031] The submersible oil pump is started or stopped by the local PLC control cabinet to achieve the purpose of transporting or discharging oil from the surface to the underground mine.

[0032] The plunger pump is started or stopped by the PLC control cabinet of the underground oil tank, and the reserved fuel in the underground tank is transported in reverse to fill the fuel delivery pipeline. Then the plunger pump is stopped from transporting in reverse, and the speed of fuel delivery is controlled by the bypass regulating valve to suppress the hazards of high pressure, high flow rate, water hammer effect, etc. in the pipeline caused by the height difference when transporting oil vertically from the surface to the underground. The plunger pump is only used for the first oil transportation;

[0033] The electric switch valve is connected to the local PLC control cabinet, sends the electric switch valve status information and fault information to the control cabinet, receives the command signal sent by the PLC control cabinet, and performs operations;

[0034] The electric regulating valve is connected to the local PLC control cabinet, sends the electric regulating valve status information and fault information to the control cabinet, and receives the adjustment command signal from the PLC control cabinet, which is interlocked with the flow signal, and controls the fuel flow rate in the pipeline within a reasonable range through PID adjustment.

[0035] Specifically, the host computer includes a monitoring computer host, which is connected to a display and a human-computer interaction interface, and displays the oil transportation system status information on the display, so that operators can centrally monitor the oil transportation system.

[0036] Compared with the prior art, the utility model has the following beneficial effects:

[0037] 1) Based on signal detection, various important parameters in the system operation are monitored in real time, system failures can be discovered in time, and corresponding alarm records can be made;

[0038] 2) Reduce the labor intensity of workers, reduce the impact of human judgment factors, achieve unattended operation, and improve processing speed and system reliability;

[0039] 3) Based on the control system, reduce safety hazards such as pipe pressure, flow velocity, water hammer effect, etc. to ensure safe and reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The utility model is a system block diagram of an automatic control system for underground fuel transportation for mining.

[0041] Figure 2 It is a schematic diagram of the structure of surface oil storage tanks and surface transfer tanks.

[0042] Figure 3 It is a structural schematic diagram of an underground oil collecting tank.

[0043] Figure 4 It is a structural diagram of an underground oil storage tank.

[0044] Attached Figure 2 , 3 , 4, the structure list represented by each number is as follows:

[0045] 11. a first pressure sensor, 12. a first liquid level sensor, 13. a first temperature sensor, 14. a first submersible oil pump, 15. a first combustible gas alarm, 16. a first electric switch valve;

[0046] 21. a second pressure sensor, 22. a second liquid level sensor, 23. a second temperature sensor, 24. a second submersible pump;

[0047] 31. a third temperature sensor, 32. a third liquid level sensor, 33. a third pressure sensor, 34. a third submersible oil pump, 35. a second electric switch valve, 36. a first electric regulating valve, 37. a first flow sensor, 38. a second combustible gas alarm;

[0048] 41. a fourth temperature sensor, 42. a fourth liquid level sensor, 43. a fourth pressure sensor, 44. a second flow sensor, 45. a second electric regulating valve, 46. a third combustible gas alarm, 47. a pressure gauge, 48. a high-pressure plunger pump, 49. a third electric switch valve;

[0049] 5. Fifth pressure sensor;

[0050] 6. Fuel dispenser. DETAILED DESCRIPTION

[0051] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0052] Example 1

[0053] like Figure 1 As shown, the automatic control system for underground fuel transportation in mines includes: a host computer, a surface switch, a surface PLC control cabinet, an underground switch, an underground oil collecting tank PLC control cabinet, and an underground oil storage tank PLC control cabinet.

[0054] The surface switch is connected to the host computer through the communication line. The surface PLC control cabinet is connected to the surface switch through the communication line. The underground switch is connected to the surface switch through the communication line. The underground oil collecting tank PLC control cabinet is connected to the underground switch through the communication line. The underground oil storage tank PLC control cabinet is connected to the underground switch through the communication line.

[0055] The surface PLC control cabinet is connected to the surface oil storage tank and the surface transfer tank. The underground oil collecting tank PLC control cabinet is connected to the underground oil collecting tank. The underground oil storage tank PLC control cabinet is connected to the underground oil storage tank. The underground switch is also connected to the refueling machine.

[0056] Based on this technical solution, each local PLC control cabinet collects the status signals of field instruments and equipment and sends control signals. After being processed by the PLC control cabinet, the signals are sent to the host computer in the surface control room through communication lines such as optical fiber networks for centralized monitoring, thereby improving the automation level of the underground fuel transportation system for mines.

[0057] Example 2

[0058] On the basis of Example 1, Figure 2 As shown, the surface oil storage tank includes: a tank body; a first temperature sensor 13 connected to the surface PLC control cabinet; a first pressure sensor 11 connected to the surface PLC control cabinet; a first liquid level sensor 12 connected to the surface PLC control cabinet; and a first submersible pump 14 connected to the surface PLC control cabinet. The tank body of the surface oil storage tank is connected to the tank body of the surface oil transfer tank through the first submersible pump 14. The surface oil transfer tank is connected to the oil pipeline through the second submersible pump 24. The surface oil storage tank is filled with oil through a quick connector.

[0059] The surface transfer oil tank includes: a tank body; a second temperature sensor 23 connected to the surface PLC control cabinet; a second pressure sensor 21 connected to the surface PLC control cabinet; a second liquid level sensor 22 connected to the surface PLC control cabinet; and a second submersible pump 24 connected to the surface PLC control cabinet.

[0060] The surface PLC control cabinet is also connected to a first combustible gas alarm 15 .

[0061] Based on this technical solution, surface oil storage tanks and surface transfer tanks can be automatically monitored, and the surface transfer tanks can be controlled to supply oil to the underground well.

[0062] Example 3

[0063] On the basis of Example 1, Figure 3 As shown, the downhole oil collecting tank includes: a tank body; a third temperature sensor 31 connected to the downhole oil collecting tank PLC control cabinet; a third pressure sensor 33 connected to the downhole oil collecting tank PLC control cabinet; a third liquid level sensor 32 connected to the downhole oil collecting tank PLC control cabinet; and a third submersible pump 34 connected to the downhole oil collecting tank PLC control cabinet.

[0064] The tank body of the downhole oil collecting tank is connected to the accident oil unloading pipe and the accident oil leakage pipe respectively. The accident oil unloading pipe is provided with a first electric regulating valve 36 and a first flow sensor 37, and the accident oil leakage pipe is provided with a second electric switch valve 35; the third submersible pump 34 is connected to the quick connector through a pipeline.

[0065] The underground oil collecting tank PLC control cabinet is also connected to a second combustible gas alarm 38 .

[0066] Based on this technical solution, the underground oil collecting tank can be automatically monitored and the underground oil collecting tank can be controlled to collect the accident oil.

[0067] Example 4

[0068] On the basis of Example 1, Figure 4 As shown, the downhole oil storage tank includes: a tank body; a fourth temperature sensor 41 connected to the downhole oil storage tank PLC control cabinet; a fourth pressure sensor 43 connected to the downhole oil storage tank PLC control cabinet; a fourth liquid level sensor 42 connected to the downhole oil storage tank PLC control cabinet; and a high-pressure plunger pump 48 connected to the downhole oil storage tank PLC control cabinet. The tank body is connected to the refueling machine 6.

[0069] The tank body of the downhole oil storage tank is connected to the oil delivery pipeline through an oil inlet pipeline, and the oil inlet pipeline is provided with a second flow sensor 44 and a second electric regulating valve 45; the tank body of the downhole oil storage tank is connected to the oil delivery pipeline through an oil return pipeline, and the oil return pipeline is provided with a high-pressure plunger pump 48, a pressure gauge 47 and a third electric switch valve 49.

[0070] The underground oil storage tank PLC control cabinet is also connected to a third combustible gas alarm 46 .

[0071] Based on this technical solution, the underground oil storage tank is automatically monitored and the oil return and storage operations of the underground oil storage tank can be controlled.

[0072] The working principle of the utility model is as follows:

[0073] When starting the oil pipeline for the first time, first fill the entire oil pipeline with nitrogen, and make sure there is enough fuel in the downhole oil storage tank. Use the plunger pump to pump back to the surface oil storage tank for the first time. After ensuring that there is fuel in the entire oil pipeline, stop the plunger pump and close the outlet valve.

[0074] After the operator determines that the oil transportation system meets the operating conditions, the oil transportation sequence control program is started through the automatic control system. After the oil transportation sequence control program command is issued, the submersible pump of the surface oil storage tank is started, and the outlet main pipe electric door is interlocked to open after a delay of 1S (adjustable). After the outlet main pipe electric door is fully opened, the inlet main pipe regulating valve of the downhole oil storage tank is opened, and the oil transportation flow rate is controlled by PID adjustment according to the flow parameters on the pipeline to prevent the hidden dangers of high pressure and high flow rate in the pipeline. When the fuel level in the downhole oil storage tank reaches the high limit setting value, the surface submersible pump is stopped interlocked, and the electric valve is closed by sequence control, and the single oil transportation ends. When the fuel level in the downhole oil storage tank reaches the low limit setting value, the system automatically starts the oil transportation sequence control program again, and the cycle is repeated to realize automatic oil transportation process control.

[0075] The temperature, pressure and liquid level sensors of the tank bodies in the oil tank area are used to monitor the tank status. When the alarm parameters are higher than a certain value, the automatic control system will alarm and record automatically.

[0076] The underground oil tank area is set at the lowest point of the underground oil transportation system pipeline. When the oil transportation system has an accident or is out of service, the oil tank inlet regulating valve is started to discharge the residual fuel in the pipeline into the oil tank, and the oil flow rate is controlled by PID adjustment according to the flow parameters on the pipeline to prevent adverse effects such as high pressure and high flow rate in the pipeline. The temperature, pressure and liquid level sensors of the storage tank body in the underground oil tank area are used for tank status monitoring. When the alarm parameter is higher than a certain value, the automatic control system alarms and automatically records.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic control system for underground fuel transportation in mines, characterized in that: include: Host computer; A surface switch connected to the host computer; A surface PLC control cabinet connected to the surface switch, wherein the surface PLC control cabinet is respectively connected to a surface oil storage tank and a surface transfer oil tank; a downhole switch connected to the surface switch; A downhole oil collecting tank PLC control cabinet connected to the downhole switch, and the downhole oil collecting tank PLC control cabinet is connected to the downhole oil collecting tank; A downhole oil storage tank PLC control cabinet connected to the downhole switch, and the downhole oil storage tank PLC control cabinet is connected to the downhole oil storage tank; And a refueling machine connected to the downhole switch.

2. The automatic control system for underground fuel transportation for mining according to claim 1 is characterized in that: The surface oil storage tank comprises: a first temperature sensor (13) connected to the surface PLC control cabinet; a first pressure sensor (11) connected to the surface PLC control cabinet; a first liquid level sensor (12) connected to the surface PLC control cabinet; and a first submersible oil pump (14) connected to the surface PLC control cabinet; The surface transfer oil tank comprises: a second temperature sensor (23) connected to the surface PLC control cabinet; a second pressure sensor (21) connected to the surface PLC control cabinet; a second liquid level sensor (22) connected to the surface PLC control cabinet; and a second submersible oil pump (24) connected to the surface PLC control cabinet; The surface PLC control cabinet is also connected to a first combustible gas alarm (15).

3. The automatic control system for underground fuel transportation for mining according to claim 2 is characterized in that: The surface oil storage tank comprises a tank body, the surface oil transfer tank comprises a tank body, and the tank body of the surface oil storage tank is connected to the tank body of the surface oil transfer tank via the first submersible pump (14); The surface oil transfer tank is connected to the oil pipeline via the second submersible pump (24).

4. The automatic control system for underground fuel transportation for mining according to claim 1 is characterized in that: The downhole oil collecting tank comprises: a third temperature sensor (31) connected to the downhole oil collecting tank PLC control cabinet; a third pressure sensor (33) connected to the downhole oil collecting tank PLC control cabinet; a third liquid level sensor (32) connected to the downhole oil collecting tank PLC control cabinet; and a third submersible pump (34) connected to the downhole oil collecting tank PLC control cabinet; The underground oil collecting tank PLC control cabinet is also connected to a second combustible gas alarm (38).

5. The automatic control system for underground fuel transportation for mining according to claim 4 is characterized in that: The downhole oil collecting tank comprises a tank body, the tank body of the downhole oil collecting tank is respectively connected to an accident oil unloading pipe and an accident oil leakage pipe, the accident oil unloading pipe is provided with a first electric regulating valve (36) and a first flow sensor (37), and the accident oil leakage pipe is provided with a second electric switch valve (35); the third submersible pump (34) is connected to a quick connector through a pipeline.

6. The automatic control system for underground fuel transportation for mining according to claim 1 is characterized in that: The downhole oil storage tank comprises: a fourth temperature sensor (41) connected to the downhole oil storage tank PLC control cabinet; a fourth pressure sensor (43) connected to the downhole oil storage tank PLC control cabinet; a fourth liquid level sensor (42) connected to the downhole oil storage tank PLC control cabinet; and a high-pressure plunger pump (48) connected to the downhole oil storage tank PLC control cabinet; The underground oil storage tank PLC control cabinet is also connected to a third combustible gas alarm (46).

7. The automatic control system for underground fuel transportation for mining according to claim 6 is characterized in that: The downhole oil storage tank comprises a tank body, the tank body of the downhole oil storage tank is connected to the oil delivery pipeline via an oil inlet pipeline, the oil inlet pipeline is provided with a second flow sensor (44) and a second electric regulating valve (45); the tank body of the downhole oil storage tank is connected to the oil delivery pipeline via an oil return pipeline, the oil return pipeline is provided with the high-pressure plunger pump (48), a pressure gauge (47) and a third electric switch valve (49).

8. The automatic control system for underground fuel transportation for mining according to any one of claims 1 to 7, characterized in that: The surface oil transfer tank is connected to the underground oil collecting tank and the underground oil storage tank respectively through a deep well oil pipeline. The deep well oil pipeline is provided with a first electric switch valve (16) at one end connected to the surface oil transfer tank, and the first electric switch valve (16) is connected to the surface PLC control cabinet; the deep well oil pipeline is provided with a fifth pressure sensor (5) at one end connected to the underground oil storage tank, and the fifth pressure sensor (5) is connected to the underground oil storage tank PLC control cabinet.

9. The automatic control system for underground fuel transportation for mining according to any one of claims 1 to 7, characterized in that: The host computer includes a monitoring computer host, and the monitoring computer host is connected to a display and a human-computer interaction interface.

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