Mining anti-flooding drainage system driven by explosion-proof motor and leakproofness detection method thereof

Abstract

The invention relates to a flood-proof drainage system driven by a mining explosion-proof motor and a leakproofness detection method thereof. When running in a dry environment, the main drainage pump runs in a dry mode, and the functions of the main drainage pump are the same as those of a mine main drainage system; when the mining anti-explosion dry-type motor is submerged, the waterproof sleeve is subjected to first-layer sealing, the oil chamber is subjected to second-layer sealing, an outer-static and inner-dynamic multi-sealing structure is formed, and reliable operation of a unit in a diving state is guaranteed. Besides, both the interior of the waterproof sleeve and the interior of the oil chamber have a pressure monitoring function and a pressure adjusting function, the internal pressure of the waterproof sleeve and the internal pressure of the oil chamber are monitored in real time, liquid supplementing or air supplementing pressurization is carried out, dynamic air supplementing and air-liquid pressure self-balance of a motor cavity are achieved, the pressure difference between the two sides of a static seal or a dynamic seal is eliminated, the sealing service life is prolonged, and the sealing performance is improved. Reliable operation of the motor in a deep diving state is ensured, and normal starting of the unit during disaster relief, drainage and mine recovery is ensured. The leakproofness detection method of the flood-proof drainage system is simple and safe to operate.

Description

Technical Field

[0001] The invention relates to the technical field of mine main drainage systems, and in particular to a mine anti-flooding drainage system driven by an explosion-proof motor and a method for detecting the airtightness thereof. Background Art

[0002] The general mine main drainage system mainly includes a mine explosion-proof dry motor, a horizontal drainage pump, and a pipeline connected to the drainage pump. The output shaft of the mine explosion-proof dry motor is connected to the horizontal drainage pump to output distortion and drive the horizontal drainage pump to discharge the underground water. Once the underground water surge exceeds the drainage capacity of the mine main drainage system, the mine explosion-proof dry motor will be submerged and fail to work; the mine main drainage system will be paralyzed, eventually causing the mine to be submerged, threatening the lives of miners. According to the provisions of the "Coal Mine Safety Regulations", the mine also needs to be equipped with waterproof gates or high-power submersible electric pumps; waterproof gates are only suitable for mines with a depth of no more than 600 meters, while high-power submersible pumps are not limited to the depth of mines; therefore, high-power submersible pumps have a wider range of applications. However, high-power submersible pumps are only used when underground water submerges the mine explosion-proof dry motor, and are not used at other times; and the underground environment is harsh, and high-power submersible electric pumps are eroded by mine water and silt debris for a long time, and are easily damaged by mud and sand entering the submersible pump. Therefore, submersible electric pumps require regular maintenance; large-power submersible pumps are often installed horizontally in inclined drainage shafts, where the space is small and maintenance is inconvenient. Summary of the invention

[0003] The main technical problem that needs to be solved when mining explosion-proof dry-type motors face water flooding failures is the sealing problem; the parts of ordinary mining explosion-proof dry-type motors that are easily penetrated by water are the output shaft and the fan for heat dissipation; the purpose of the present invention is to solve the above problem and provide a flood prevention and drainage system driven by a mining explosion-proof motor and a method for detecting its airtightness.

[0004] The technical solution of the present invention is: a flood prevention and drainage system driven by an explosion-proof motor for use in a mine, comprising an explosion-proof dry-type motor for use in a mine, a horizontal drainage pump and a pipeline connected to the drainage pump; the explosion-proof dry-type motor comprises a rotor, a cylindrical shell, an outer end cover, an inner end cover and an output shaft; the inner wall of the shell is provided with a stator that cooperates with the rotor, and the outer wall is provided with a cooling channel; cooling liquid or cooling gas can be introduced into the cooling channel to cool the explosion-proof dry-type motor; the cooling channel is an existing mature technology, such as the patent with authorization announcement number CN214063303U, a main mine drainage pump with cooling function, which discloses a cooling trough body that can serve as a cooling channel; so the specific structure of the cooling channel is no longer described in detail in the present invention; the outer end cover is statically and tightly connected to one end of the shell; the inner end The cover is statically and tightly connected to the other end of the shell; the rotor is arranged inside the shell and is coaxially fixed to the output shaft; one end of the output shaft is rotatably connected to the outer end cover on the inner wall of the outer end cover, and the other end passes through the inner end cover and is dynamically and tightly rotatably connected to the inner end cover; the explosion-proof dry motor replaces the cooling fan with a cooling channel to prevent the underground water from entering the inside of the explosion-proof dry motor through the cooling fan; the explosion-proof dry motor is in a closed state; the horizontal drainage pump is provided with a drive shaft; the output shaft is coaxially fixed to the drive shaft; the flooding prevention and drainage system also includes a waterproof sleeve and an oil chamber; the waterproof sleeve is statically and tightly connected to the end of the horizontal drainage pump and the inner end cover; when the explosion-proof dry motor is flooded, the waterproof sleeve can isolate the output shaft of the explosion-proof dry motor from the underground water; the oil chamber is sleeved on the output shaft and is statically and tightly connected to the inner end cover. The output shaft is dynamically and airtightly connected; the interior of the oil chamber is filled with oil that wraps the output shaft; the oil can have a water-proof effect on the one hand, and a lubricating effect on the other; the outer wall of the oil chamber is provided with an oil pressure sensor for monitoring the oil pressure in the oil chamber, and an oil filling valve connecting the external oil source with the interior of the oil chamber; the output end of the horizontal drainage pump is connected to the output pipe; the output pipe is also connected to a detection pipe; the detection pipe is connected to the interior of the water-proof jacket; a regulating valve is provided on the detection pipe; the side wall of the water-proof jacket is provided with a pressure sensor A for monitoring the interior of the water-proof jacket, and a pressure control valve A connecting the outside with the interior of the water-proof jacket; the water-proof jacket is the first layer of water-proof for the explosion-proof dry motor; the oil chamber is the second layer of water-proof for the explosion-proof dry motor; two layers of water-proof can form a better water-proof effect for the explosion-proof dry motor; when conducting a tightness test, the detection pipe can The underground water is introduced into the waterproof sleeve to simulate the flooding state; the regulating valve can adjust the pressure and flow rate of the underground water introduced into the waterproof sleeve; the pressure of the underground water is a specific pressure; the pressure sensor A can detect the pressure in the waterproof sleeve in real time; the sealing condition is judged according to the difference between the detection value of the pressure sensor A and the specific pressure; when the mine explosion-proof dry motor is flooded, the waterproof sleeve and the outer end cover separate the underground water from the mine explosion-proof dry motor; the underground water can only penetrate into the mine explosion-proof dry motor from the pump body of the horizontal drainage pump along the drive shaft and the output shaft; the dynamic closed connection between the output shaft and the oil chamber blocks this part of the underground water in the waterproof sleeve; the pressure sensor A detects the pressure of this part of the underground water in the waterproof sleeve in real time;The oil filling valve is opened, and the oil filling valve connected to the external oil source injects oil into the oil chamber, causing the oil pressure in the oil chamber to rise; the oil pressure sensor monitors the rising oil pressure in real time; when the oil pressure rises to the pressure value detected by pressure sensor A, the oil filling valve is closed; the pressure on both sides of the dynamic sealed connection structure between the output shaft and the oil chamber is balanced; the airtightness of the dynamic sealed connection structure between the output shaft and the oil chamber is guaranteed. ;

[0005] Preferably, there are several oil chambers which are connected in parallel to the output shaft in sequence; adjacent oil chambers are statically and tightly connected; the increase in the number of oil chambers can improve the water-isolating effect.

[0006] Preferably, the flood prevention and drainage system driven by the mining explosion-proof motor also includes a coupling; the output shaft and the drive shaft are coaxially fixedly connected through the coupling for transmitting torque.

[0007] Preferably, the pressure control valve A is arranged on the lower side of the water-blocking jacket, which can not only serve as an input port for an external gas source, but also as a discharge port after the underground water gushes into the water-blocking jacket.

[0008] Preferably, the horizontal drainage pump is a non-axial force self-balancing pump and can work in a non-submersible state.

[0009] Preferably, the horizontal drainage pump is an axial force self-balancing pump; the internal impellers of the axial force self-balancing pump are arranged in a counter-rotating manner to form a symmetrical impeller group, which can work submersible.

[0010] Preferably, a pressure sensor B for monitoring the inside of the motor and a pressure control valve B connecting the outside with the inside of the motor are provided on the side of the outer shell; the pressure sensor B and the pressure control valve B are staggered with the cooling channel; the pressure control valve B can transport gas or liquid to the inside of the motor; the oil pressure sensor and the pressure sensor B are used to detect the pressure inside the oil chamber and the inside of the motor respectively; when the detection value of the pressure sensor B is significantly smaller than the detection value of the oil pressure sensor, the pressure control valve B adds corresponding gas or liquid to the inside of the motor to make the internal pressure of the motor equivalent to the internal pressure of the oil chamber, and the inside of the motor also isolates the oil and liquid in the oil chamber to prevent the downhole water in the watertight sleeve from seeping into the inside of the motor.

[0011] A method for detecting the tightness of the above-mentioned anti-flooding drainage system driven by an explosion-proof motor for mining comprises the following steps: ①Transport fluid of specific pressure into the watertight jacket through the detection pipeline or pressure control valve A; ② Make judgment based on the real-time monitoring of pressure sensor A and oil pressure sensor The pressure sensor A detects the pressure inside the watertight sleeve in real time; the oil pressure sensor detects the pressure in the oil chamber in real time; when the monitoring value of the pressure sensor A = the specific pressure of the fluid, the fluid does not flow in the watertight sleeve, and the sealing effect inside the watertight sleeve is good; When the monitoring value of pressure sensor A is less than the specific pressure of the fluid, oil equal to the specific pressure is input into the oil chamber through the oil filling valve; when the monitoring value of the oil pressure sensor = the specific pressure of the fluid, there may be leakage in the static closed connection between the outer casing and the inner end cover, and in the static closed connection between the outer casing and the end of the horizontal drainage pump; when the monitoring value of the oil pressure sensor is less than the specific pressure of the fluid, there may be leakage in the dynamic closed connection between the oil chamber and the output shaft.

[0012] Preferably, in step ①, the explosion-proof dry motor outputs torque through the output shaft, driving the drive shaft to rotate; the rotation of the drive shaft causes the horizontal drainage pump to discharge the underground water through the output end; a part of the underground water is discharged through the output pipe, and the other part is injected into the watertight sleeve through the detection pipe; the injected underground water can control the flow and pressure through the regulating valve to reach a specific pressure value.

[0013] Preferably, in step ①, the pressure control valve A is connected to an external gas source; the pressure output by the external gas source is a specific pressure; the pressure control valve A is opened to allow gas of the specific pressure to enter the watertight jacket.

[0014] The beneficial effects of the present invention are as follows: the anti-flooding and drainage system driven by the explosion-proof motor for mining of the present invention has the following advantages: (1) When the present invention operates in a dry environment, it acts as the main drainage pump and its function is the same as that of the main drainage system of a mine. When the mine explosion-proof dry motor is submerged, the waterproof jacket performs the first layer of sealing, and the oil chamber performs the second layer of sealing, forming a multi-pass sealing structure with static outside and dynamic inside, to ensure the reliable operation of the unit in a submerged state. In addition, the inside of the waterproof jacket and the inside of the oil chamber both have pressure monitoring and pressure regulation functions, which monitor the internal pressure of the waterproof jacket and the internal pressure of the oil chamber in real time, and perform fluid replenishment or air replenishment to increase pressure, realize dynamic air replenishment of the motor cavity and self-balancing of gas-liquid pressure, eliminate the pressure difference on both sides of the static seal or dynamic seal, improve the life and sealing performance of the seal, ensure the reliable operation of the motor in a deep submerged state, and ensure that the unit can be started normally during disaster relief, drainage and mining resumption. (2) The detection pipeline of the present invention can introduce the high-pressure liquid in the output pipeline into the interior of the watertight sleeve, and control the pressure in the watertight sleeve by adjusting the opening of the valve. At the same time, the oil chamber pressure is manually adjusted for daily sealing performance testing and pressure balance testing and inspection of the unit to ensure the reliability of the system unit during submerged operation.

[0015] The airtightness detection method of the flood control and drainage system is simple and safe to operate, and can detect sealing problems in time, thereby ensuring the smooth operation of the mine explosion-proof dry motor and the smooth operation of the flood control and drainage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the anti-flooding and drainage system driven by the explosion-proof motor for mining of the present invention in the first embodiment; Figure 2 yes Figure 1 I magnified view of; Figure 3 It is a structural schematic diagram of a flood prevention and drainage system driven by a mining explosion-proof motor of the present invention in Embodiment 2; Figure 4 It is a structural schematic diagram of the anti-flooding and drainage system driven by the explosion-proof motor for mining of the present invention in the third embodiment; In the figure: 11. rotor, 12. casing, 121. cooling channel, 122. pressure sensor B, 123. pressure control valve B, 13. outer end cover, 14. inner end cover, 15. output shaft, 2. horizontal drainage pump, 21. driving shaft, 31. output pipeline, 32. detection pipeline, 321. regulating valve, 4. water-blocking jacket, 41. pressure sensor A, 42. pressure control valve A, 5. oil chamber, 51. oil pressure sensor, 52. oil filling valve, 6. coupling. DETAILED DESCRIPTION

[0017] Example 1: See Figure 1-2, a flood prevention and drainage system driven by an explosion-proof motor for mining, comprising an explosion-proof dry motor for mining, a horizontal drainage pump 2 and a pipeline connected to the drainage pump; the explosion-proof dry motor comprises a rotor 11, a cylindrical shell 12, an outer end cover 13, an inner end cover 14, and an output shaft 15; the inner wall of the shell 12 is provided with a stator matched with the rotor 11, and the outer wall is provided with a cooling channel 121; the cooling channel 121 can be passed with cooling liquid or cooling gas to cool the explosion-proof dry motor; the cooling channel 121 is an existing mature technology, such as the patent with authorization announcement number CN214063303U, a main mine drainage pump with cooling function, which discloses a cooling trough body that can serve as the cooling channel 121; so regarding the specific structure of the cooling channel 121, The present invention will not be described in detail; the outer end cover 13 is statically and tightly connected to one end of the outer shell 12; the inner end cover 14 is statically and tightly connected to the other end of the outer shell 12; the rotor 11 is arranged inside the outer shell 12 and is coaxially fixed to the output shaft 15; one end of the output shaft 15 is rotatably connected to the outer end cover 13 on the inner wall of the outer end cover 13, and the other end passes through the inner end cover 14 and is dynamically and tightly rotatably connected to the inner end cover 14; the explosion-proof dry motor replaces the cooling fan with a cooling channel 121, thereby preventing underground water from entering the interior of the explosion-proof dry motor through the cooling fan; the explosion-proof dry motor is in a closed state; the horizontal drainage pump 2 is provided with a drive shaft 21; the output shaft 15 is coaxially fixed to the drive shaft 21; the flood prevention and drainage system also includes a waterproof jacket 4 and an oil chamber 5; the waterproof jacket 4 is connected to the ends of the horizontal drainage pump 2 The outer wall of the oil chamber 5 is provided with an oil pressure sensor 51 for monitoring the oil pressure in the oil chamber 5, and an oil filling valve 52 for connecting an external oil source with the inside of the oil chamber 5; the output end of the horizontal drainage pump 2 is connected to the output pipe 31; the output pipe 31 is also connected to a detection pipe 32; the detection pipe 32 is connected to the inside of the water-blocking sleeve 4; a regulating valve 321 is provided on the detection pipe 32 ; The side wall of the waterproof jacket 4 is provided with a pressure sensor A 41 for monitoring the inside of the waterproof jacket 4, and a pressure control valve A 42 for connecting the outside with the inside of the waterproof jacket 4; the waterproof jacket 4 is the first waterproof layer of the explosion-proof dry motor; the oil chamber 5 is the second waterproof layer of the explosion-proof dry motor; the two layers of waterproofing can form a better waterproofing effect for the explosion-proof dry motor; when performing a tightness test, the detection pipeline 32 can introduce the underground water into the waterproof jacket 4 to simulate a flooded state; the regulating valve 321 can adjust and control the pressure and flow of the underground water introduced into the waterproof jacket 4; the pressure of the underground water is a specific pressure; the pressure sensor A 41 can perform real-time detection of the pressure in the waterproof jacket 4; the sealing condition is judged according to the difference between the detection value of the pressure sensor A 41 and the specific pressure;When the mine explosion-proof dry motor is flooded, the water-blocking sleeve 4 and the outer end cover 13 separate the underground water from the mine explosion-proof dry motor; the underground water can only penetrate into the mine explosion-proof dry motor from the pump body of the horizontal drainage pump 2 along the drive shaft 21 and the output shaft 15; the dynamic and airtight connection between the output shaft 15 and the oil chamber 5 blocks this part of the underground water in the water-blocking sleeve 4; the pressure sensor A 41 detects the pressure of this part of the underground water in the water-blocking sleeve 4 in real time; the oil injection valve 52 is opened, and the oil injection valve 52 connected to the external oil source injects oil into the oil chamber 5, so that the oil pressure in the oil chamber 5 rises; the oil pressure sensor 51 monitors the rising oil pressure in real time; when the oil pressure rises to the same pressure value as that detected by the pressure sensor A 41, the oil injection valve is closed; the pressure balance is achieved on both sides of the dynamic and airtight connection structure between the output shaft 15 and the oil chamber 5; the airtightness of the dynamic and airtight connection structure between the output shaft 15 and the oil chamber 5 is guaranteed. ;

[0018] Compared with the prior art, the present invention provides a cooling channel 121 in the housing 12 of the explosion-proof dry-type motor for mining to replace fan cooling, so that the two ends of the explosion-proof dry-type motor for mining are statically and tightly connected with the outer end cover 13 and the inner end cover 14, so that the explosion-proof dry-type motor for mining is in a basically closed state; at the inner end cover 14, the present invention is provided with a watertight jacket 4 which is statically and tightly connected with the explosion-proof dry-type motor for mining and the horizontal drainage pump 2, and an oil chamber 5 which is dynamically and tightly connected with the output shaft 15; the watertight jacket 4 is provided with a pressure sensor A 41; the oil chamber 5 is provided with an oil pressure sensor 51 and an oil filling valve 52; the watertight sleeve 4 is the first layer of watertightness for the explosion-proof dry motor; the oil chamber 5 is the second layer of watertightness for the explosion-proof dry motor; the two layers of watertightness can form a better watertightness effect for the explosion-proof dry motor; the pressure sensor A 41, the oil pressure sensor 51, and the oil filling valve 52 cooperate with each other, and the pressure balance is achieved on both sides of the dynamic closed connection structure between the output shaft 15 and the oil chamber 5, and the airtightness of the dynamic closed connection structure between the output shaft 15 and the oil chamber 5 is guaranteed.

[0019] There are several oil chambers 5, which are sequentially connected to the output shaft 15; adjacent oil chambers 5 are statically and tightly connected; the increase in the number of oil chambers 5 can improve the water-proof effect. In this embodiment, there are two oil chambers 5.

[0020] In this embodiment, the cooling channel 121 is a channel that surrounds the outer shell 12 and reciprocates along the axial direction of the outer shell 12 .

[0021] The anti-flooding and drainage system driven by the explosion-proof motor for mining further includes a coupling 6; the output shaft 15 and the drive shaft 21 are coaxially fixedly connected through the coupling 6 for transmitting torque.

[0022] The pressure control valve A 42 is arranged at the lower side of the waterproof jacket 4, and can not only serve as an input port for an external gas source, but also as a discharge port after the underground water enters the waterproof jacket 4.

[0023] The horizontal drainage pump 2 in this embodiment is a self-balancing pump.

[0024] A pressure sensor B 122 for monitoring the inside of the motor and a pressure control valve B 123 for connecting the outside with the inside of the motor are provided on the side of the casing 12; the pressure sensor B 122 and the pressure control valve B 123 are staggered from the cooling channel 121; the pressure control valve B 123 can transport gas or liquid to the inside of the motor; the oil pressure sensor 51 and the pressure sensor B 122 are used to detect the pressure inside the oil chamber 5 and the inside of the motor respectively; when the detection value of the pressure sensor B 122 is significantly smaller than the detection value of the oil pressure sensor 51, the pressure control valve B 123 replenishes the corresponding gas or liquid into the motor to make the internal pressure of the motor equivalent to the internal pressure of the oil chamber 5, and the inside of the motor also isolates the oil in the oil chamber 5 to prevent the downhole water in the watertight sleeve 4 from seeping into the inside of the motor.

[0025] Both static sealed connection and dynamic sealed connection are mature existing technologies; static sealed connection refers to the sealed connection between two parts without relative motion, which can be divided into medium and low pressure static seals and high pressure static seals; among them, medium and low static pressure seals often use wider and softer gaskets, and high pressure static seals are composed of cemented carbide with narrower contact width; this embodiment uses flange connection, lap end seal and O-ring seal; dynamic sealed connection is a sealing method in which the joint surface where the seal is located is in a relative motion state during the operation of the equipment, including packing seals, mechanical seals and oil seals; the dynamic sealed connection in this embodiment uses a combination of mechanical seals and oil seals.

[0026] The working process of this embodiment is as follows: when the mine explosion-proof dry motor is flooded, the waterproof sleeve 4 and the outer end cover 13 separate the underground water from the mine explosion-proof dry motor; the underground water can only penetrate into the mine explosion-proof dry motor from the pump body of the horizontal drainage pump 2 along the drive shaft 21 and the output shaft 15; the dynamic and airtight connection between the output shaft 15 and the oil chamber 5 blocks this part of the underground water in the waterproof sleeve 4; the pressure sensor A 41 detects the pressure of this part of the underground water in the waterproof sleeve 4 in real time; the oil injection valve 52 is opened, and the oil injection valve 52 connected to the external oil source injects oil into the oil chamber 5, so that the oil pressure in the oil chamber 5 rises; the oil pressure sensor 51 detects the rising oil Real-time pressure monitoring; when the oil pressure rises to a pressure value equivalent to that detected by pressure sensor A 41, the oil filling valve is closed; pressure balance is achieved on both sides of the dynamic closed connection structure between the output shaft 15 near the watertight sleeve 4 and the oil chamber 5; at the same time, the pressure control valve B 123 is opened to inject fluid into the motor; the pressure sensor B 122 monitors the pressure of the injected fluid in real time; when the fluid pressure rises to a pressure value equivalent to that detected by pressure sensor A 41, the pressure control valve B 123 is closed; pressure balance is achieved on both sides of the dynamic closed connection structure between the output shaft 15 near the motor and the oil chamber 5; the airtightness of the dynamic closed connection structure between the output shaft 15 and the oil chamber 5 is guaranteed.

[0027] Example 2: See Figure 3 The second embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that the horizontal drainage pump 2 is a non-axial force self-balancing pump and can work without submersion. There is one oil chamber 5 in this embodiment.

[0028] Example 3: See Figure 4 The third embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that the horizontal drainage pump 2 is an axial force self-balancing pump; the internal impellers of the axial force self-balancing pump are arranged in a counter-rotating manner to form a symmetrical impeller group, which can work submersible. There is one oil chamber 5 in this embodiment.

[0029] Embodiment 4: A method for detecting the tightness of a flood prevention and drainage system driven by a mining explosion-proof motor as described in Embodiment 1, comprising the following steps: ① Delivering a fluid of a specific pressure into the watertight jacket 4 through the detection pipeline 32 or the pressure control valve A 42; ② Make judgment based on the real-time monitoring of pressure sensor A 41 and oil pressure sensor 51 The pressure sensor A 41 detects the pressure inside the watertight jacket 4 in real time; the oil pressure sensor 51 detects the pressure inside the oil chamber 5 in real time; when the monitoring value of the pressure sensor A 41 = the specific pressure of the fluid, the fluid does not flow in the watertight jacket 4, and the sealing effect inside the watertight jacket 4 is good; When the monitoring value of the pressure sensor A 41 is less than the specific pressure of the fluid, oil equivalent to the specific pressure is input into the oil chamber 5 through the oil filling valve 52; the monitoring value of the oil pressure sensor 51 = the specific pressure of the fluid, and there is a possibility of leakage in the static closed connection between the outer casing 12 and the inner end cover 14, and in the static closed connection between the outer casing 12 and the end of the horizontal drainage pump 2; the monitoring value of the oil pressure sensor 51 is less than the specific pressure of the fluid; there is a possibility of leakage in the dynamic closed connection between the oil chamber 5 and the output shaft 15.

[0030] Embodiment 5: Embodiment 5 is basically the same as Embodiment 4, and the similarities are not repeated here. The differences are as follows: in step ①, the explosion-proof dry motor outputs torque through the output shaft 15, driving the drive shaft 21 to rotate; the rotation of the drive shaft 21 causes the horizontal drainage pump 2 to discharge the downhole water through the output end; a part of the downhole water is discharged through the output pipe 31, and the other part is injected into the watertight sleeve 4 through the detection pipe 32; the injected downhole water can control the flow and pressure through the regulating valve 321 to reach a specific pressure value.

[0031] This embodiment can simulate the situation where underground water gushes into the waterproof jacket 4 when the explosion-proof dry motor is submerged; the detection result of this airtightness detection method fits the actual situation.

[0032] Example 6: Example 6 is basically the same as Example 4, and the similarities are not repeated here. The difference is: in step ①, the pressure control valve A 42 is connected to the external gas source; the pressure output by the external gas source is a specific pressure; the pressure control valve A 42 is opened to allow the gas of the specific pressure to enter the watertight jacket 4.

[0033] The airtightness detection method of this embodiment will not cause damage even if an airtightness problem occurs and gas of a specific pressure enters the interior of the motor.

Claims

1. A flood prevention and drainage system driven by a mine explosion-proof motor, comprising a mine explosion-proof dry motor, a horizontal drainage pump and a pipeline connected to the drainage pump; characterized in that: The explosion-proof dry-type motor comprises a rotor, a cylindrical housing, an outer end cover, an inner end cover, and an output shaft; the inner wall of the housing is provided with a stator matching the rotor, and the outer wall is provided with a cooling channel; the outer end cover is statically and tightly connected to one end of the housing; the inner end cover is statically and tightly connected to the other end of the housing; the rotor is arranged inside the housing and is coaxially fixedly connected to the output shaft; one end of the output shaft is rotatably connected to the outer end cover at the inner wall of the outer end cover, and the other end passes through the inner end cover and is dynamically and tightly rotatably connected to the inner end cover; the horizontal drainage pump is provided with a driving shaft; the output shaft is coaxially and firmly connected to the driving shaft; the flood prevention and drainage system also comprises a waterproof sleeve and an oil chamber; the waterproof sleeve is connected to the horizontal The end of the horizontal drainage pump and the inner end cover are statically and tightly connected; the oil chamber is mounted on the output shaft and is statically and tightly connected to the inner end cover, and is dynamically and tightly connected to the output shaft; the interior of the oil chamber is filled with oil that wraps the output shaft; the outer wall of the oil chamber is provided with an oil pressure sensor for monitoring the oil pressure in the oil chamber, and an oil filling valve connecting the external oil source with the interior of the oil chamber; the output end of the horizontal drainage pump is connected to the output pipe; the output pipe is also connected to a detection pipe; the detection pipe is connected to the interior of the watertight jacket; a regulating valve is provided on the detection pipe; the side wall of the watertight jacket is provided with a pressure sensor A for monitoring the interior of the watertight jacket, and a pressure control valve A connecting the outside with the interior of the watertight jacket.

2. The anti-flooding and drainage system driven by an explosion-proof motor for mining according to claim 1 is characterized in that: There are several oil chambers which are connected in parallel to the output shaft in sequence; adjacent oil chambers are statically and tightly connected.

3. The anti-flooding and drainage system driven by an explosion-proof motor for mining according to claim 1 is characterized in that: It also includes a coupling; the output shaft and the drive shaft are coaxially fixedly connected through the coupling.

4. The anti-flooding and drainage system driven by an explosion-proof motor for mining according to claim 1 is characterized in that: The pressure control valve A is arranged on the lower side of the watertight jacket.

5. The anti-flooding and drainage system driven by an explosion-proof motor for mining according to claim 1 is characterized in that: The horizontal drainage pump is a non-axial force self-balancing pump.

6. The anti-flooding and drainage system driven by an explosion-proof motor for mining according to claim 1 is characterized in that: The horizontal drainage pump is an axial force self-balancing pump.

7. The anti-flooding and drainage system driven by an explosion-proof motor for mining according to claim 1 is characterized in that: A pressure sensor B for monitoring the inside of the motor and a pressure control valve B for connecting the outside with the inside of the motor are arranged on the side of the shell.

8. A method for detecting the tightness of a flood prevention and drainage system driven by a mine explosion-proof motor according to claim 1, characterized in that: The following steps are involved: ①Transport fluid of specific pressure into the watertight jacket through the detection pipeline or pressure control valve A; ② Make judgment based on the real-time monitoring of pressure sensor A and oil pressure sensor The pressure sensor A detects the pressure inside the watertight sleeve in real time; the oil pressure sensor detects the pressure in the oil chamber in real time; when the monitoring value of the pressure sensor A = the specific pressure of the fluid, the fluid does not flow in the watertight sleeve, and the sealing effect inside the watertight sleeve is good; When the monitoring value of pressure sensor A is less than the specific pressure of the fluid, oil equal to the specific pressure is input into the oil chamber through the oil filling valve; when the monitoring value of the oil pressure sensor = the specific pressure of the fluid, there may be leakage in the static closed connection between the outer casing and the inner end cover, and in the static closed connection between the outer casing and the end of the horizontal drainage pump; when the monitoring value of the oil pressure sensor is less than the specific pressure of the fluid, there may be leakage in the dynamic closed connection between the oil chamber and the output shaft.

9. A method for detecting the tightness of a flood prevention and drainage system driven by a mine explosion-proof motor as claimed in claim 8, characterized in that: In step ①, the explosion-proof dry motor outputs torque through the output shaft, driving the drive shaft to rotate; the rotation of the drive shaft causes the horizontal drainage pump to discharge the underground water through the output end; part of the underground water is discharged through the output pipe, and the other part is injected into the watertight sleeve through the detection pipe; the injected underground water can control the flow and pressure through the regulating valve to reach a specific pressure value.

10. A method for detecting the tightness of a flood prevention and drainage system driven by a mine explosion-proof motor according to claim 8, characterized in that: In step ①, the pressure control valve A is connected to an external gas source; the pressure output by the external gas source is a specific pressure; the pressure control valve A is opened to allow the gas of the specific pressure to enter the watertight jacket.

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