CN212364811U - Capacitive underground water pumping device for coal mine - Google Patents

Abstract

The utility model relates to a capacitive underground pumping device for coal mines, which belongs to the technical field of drainage of underground roadway drainage ponds of coal mines; the capacitance type underground pumping device is not influenced by sludge and can accurately measure the liquid level of a drainage pool in a mine underground roadway; the technical scheme is as follows: a capacitive downhole pumping device for coal mines, comprising: the system comprises an intrinsic safety control power supply, a control circuit, a water pump and an intrinsic safety power supply; the direct current output end of the intrinsic safety power supply is electrically connected with the control circuit, and the intrinsic safety power supply, the control circuit and the water pump are sequentially connected in series; the utility model discloses but wide application in coal or other resource exploitation trades in the pit.

Description

Capacitive underground water pumping device for coal mine

Technical Field

The utility model relates to a capacitive underground pumping device for coal mine belongs to colliery underworkings drainage pool drainage technical field.

Background

During the current coal mine underground roadway tunneling, the drainage pump arranged at the drainage point can adopt an automatic control system to drain water. Compared with the manual operation of the water pump operator in the past, the efficiency and the safety are greatly improved. However, this kind of automatic water pump operating system adopts resistance-type liquid level detector, and the ponding in the tunnel contains more mud, and after the water pump was discharged ponding, always had mud to adhere to on the liquid level detector, leads to the water pump can not in time close, and the water pump generates heat the condition of damage and takes place occasionally, therefore this kind of automatic water pump operating system still need be equipped with the water pump operative employee, and efficiency is lower. Meanwhile, if a water pump operator fails to close the water pump in time due to negligence, the safety of mine production is possibly greatly influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a do not receive the mud to influence, to the accurate capacitive pumping device in pit tunnel in the pit of drainage pond liquid level measurement.

In order to achieve the technical purpose, the utility model provides a technical scheme does: a capacitive downhole pumping device for coal mines, comprising: the system comprises an intrinsic safety control power supply, a control circuit, a water pump and an intrinsic safety power supply;

the direct current output end of the intrinsic safety power supply is electrically connected with the control circuit, and the intrinsic safety power supply, the control circuit and the water pump are sequentially connected in series;

the control circuit includes: the liquid level detection sensor, the singlechip, the thyristor drive circuit, the thyristor and the relay; the liquid level detection sensor is connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the thyristor drive circuit, the output end of the thyristor drive circuit is connected with the control end of the thyristor, the thyristor is connected in series in the positive circuit of the relay coil, the relay contact is connected in series in the circuit of the intrinsic safety power supply and the water pump, and the liquid level detection sensor is a capacitance type liquid level sensor;

the water pump is arranged in a drainage pool in a mine underground roadway, and the liquid level detection sensor is arranged above the drainage pool in the mine underground roadway.

The liquid level detection sensor includes: the capacitance barrel, the upper polar plate, the lower polar plate, the suspension plate and the sensor measuring circuit; the capacitor barrel is fixed above a drainage pool in a roadway under a mine, the capacitor barrel is of a barreled structure with an opening at one end and a downward opening, an upper polar plate is fixed on the upper portion of the capacitor barrel, a lower polar plate is arranged in the capacitor barrel below the upper polar plate, the lower polar plate can slide up and down relative to the capacitor barrel, a suspension plate is arranged below the lower polar plate, the lower polar plate and the suspension plate are connected through an insulating supporting rod, the upper polar plate and the lower polar plate are respectively electrically connected with a sensor measuring circuit, and a signal voltage output end of the sensor measuring circuit is electrically connected with a single chip microcomputer.

The sensor measurement circuit includes: the circuit comprises an operational amplifier A, a fixed capacitor C and a power supply U, wherein the non-inverting input end and the inverting input end of the operational amplifier A are respectively connected with the positive electrode and the negative electrode of the power supply U, the fixed capacitor C is connected in series with the inverting input end of the operational amplifier A in a circuit, the inverting input end of the operational amplifier A is electrically connected with a lower electrode plate, and the output end of the operational amplifier A is electrically connected with an upper electrode plate and a signal input end of a single chip microcomputer.

The suspension plate is a liquid thin plate with density smaller than that of water, and the suspension plate is horizontally arranged on the water surface in a drainage pool in the mine roadway.

And a plurality of supporting columns are arranged on the lower surface of the suspension plate.

And a plurality of vent holes are formed in the wall of the capacitor barrel between the upper polar plate and the lower polar plate.

The outer wall of the capacitor barrel is covered with a layer of sponge, and the sponge can cover the vent holes.

The capacitor barrel is made of insulating materials.

The water pump is a submersible pump.

The operational amplifier A is μ A741.

Capacitor media, such as ceramic media, can be arranged in the capacitor barrels of the upper polar plate and the lower polar plate.

The signal voltage U0 input into the singlechip by the sensor measuring circuit is as follows:

u0 is the signal voltage input into the single chip by the sensor measuring circuit,

u is the voltage of a power supply U, the power supply U is a direct current power supply,

c is the capacitance of the fixed capacitor C,

d is the distance between the upper polar plate and the lower polar plate,

epsilon is the medium coefficient between the upper polar plate and the lower polar plate,

and S is the area of the opposite plate surface of the upper polar plate and the lower polar plate.

Compared with the prior art, the utility model has the beneficial effects of:

one, the utility model discloses a capacitanc sensor measures the liquid level height, has avoided sensor and ponding direct contact, and the reflection is sensitive simultaneously, and the small change of water level all can touch the sensor, is convenient for open fast and stop the water pump.

Two, the utility model discloses a be provided with a plurality of support columns on the suspension plate lower surface, prevent that ponding in the pond from exhausting back, the suspension plate adsorbs on silt, when leading to ponding more, the suspension plate can't rise and float.

Thirdly, the utility model discloses a be provided with a plurality of air vents and sponge on the electric capacity bucket wall, when the bottom plate of being convenient for upwards moves, with inside gas outgoing. Meanwhile, the sponge has an insulating function, and electric sparks are prevented from being generated between the upper and lower pole plates and external metal.

Drawings

FIG. 1 is a circuit diagram of the present invention;

FIG. 2 is a circuit diagram of the water pump and the intrinsically safe power supply of the present invention;

FIG. 3 is a structural diagram of the liquid level detecting sensor of the present invention;

FIG. 4 is a circuit diagram of the sensor measurement of the present invention;

in the figure: the device comprises a water pump 1, an intrinsic safety control power supply 2, a liquid level detection sensor 3, a single chip microcomputer 4, a thyristor drive circuit 5, a thyristor 6, a relay 7, a capacitor barrel 31, an upper polar plate 32, a lower polar plate 33, a suspension plate 34, an air vent 35 and a sponge 36.

Detailed Description

As shown in fig. 1 to 4: a capacitive downhole pumping device for coal mines, comprising: the system comprises an intrinsic safety control power supply 2, a control circuit, a water pump 1 and an intrinsic safety power supply;

the direct current output end of the intrinsic safety power supply 2 is electrically connected with the control circuit, and the intrinsic safety power supply, the control circuit and the water pump 1 are sequentially connected in series;

the control circuit includes: the liquid level detection sensor 3, the singlechip 4, the thyristor drive circuit 5, the thyristor 6 and the relay 7; the liquid level detection sensor 3 is connected with the input end of the single chip microcomputer 4, the output end of the single chip microcomputer 4 is connected with the thyristor drive circuit 5, the output end of the thyristor drive circuit 5 is connected with the control end of the thyristor 6, the thyristor 6 is connected in series in the positive circuit of the coil of the relay 7, the contact of the relay 7 is connected in series in the circuit of the intrinsic safety power supply and the water pump 1, and the liquid level detection sensor 3 is a capacitance type liquid level sensor;

the water pump 1 is arranged in a drainage pool in a mine underground roadway, and the liquid level detection sensor 3 is arranged above the drainage pool in the mine underground roadway.

The liquid level detection sensor 3 includes: a capacitor barrel 31, an upper polar plate 32, a lower polar plate 33, a suspension plate 34 and a sensor measuring circuit; the capacitor bucket 31 is fixed above a drainage pool in a roadway under a mine, the capacitor bucket 31 is of a barreled structure with an opening at one end and a downward opening, an upper polar plate 32 is fixed on the upper portion of the capacitor bucket 31, a lower polar plate 33 is arranged in the capacitor bucket 31 below the upper polar plate 32, the lower polar plate 33 can slide up and down relative to the capacitor bucket 31, a suspension plate 34 is arranged below the lower polar plate 33, the lower polar plate 33 and the suspension plate 34 are connected through an insulating support rod, the upper polar plate 32 and the lower polar plate 33 are respectively electrically connected with a sensor measuring circuit, and a signal voltage output end of the sensor measuring circuit is electrically connected with the single chip microcomputer 4.

The sensor measurement circuit includes: operational amplifier A, fixed capacitor C and power U, operational amplifier A's homophase input end and inverting input end link to each other with the positive negative pole of power U respectively, the fixed capacitor C has concatenated on operational amplifier A's the inverting input end circuit, and operational amplifier A inverting input end links to each other with bottom plate 33 electricity, operational amplifier A output links to each other with upper plate 32 and 4 single-chip microcomputer signal input parts electricity.

The suspension plate 34 is a liquid thin plate with density smaller than that of water, and the suspension plate 34 is horizontally arranged on the water surface in a drainage pool in a mine roadway.

A plurality of support columns are arranged on the lower surface of the suspension plate 34.

And a plurality of vent holes 35 are formed in the wall of the capacitor barrel 31 between the upper polar plate 32 and the lower polar plate 33.

The outer wall of the capacitor barrel 31 is covered with a layer of sponge 36, and the sponge 36 can cover the vent hole 35.

The utility model discloses an operation process as follows:

the utility model discloses after installing, download corresponding procedure to singlechip 4 in, when drainage pond ponding constantly increases, the suspension 34 come-up thereupon, drive simultaneously down polar plate 33 upwards operation, singlechip 4 accepts sensor measuring circuit's voltage U0 value, when voltage U0 value reaches the specified value (when the liquid level is enough high promptly), the singlechip sends voltage signal to thyristor drive circuit 5, 7 coil circular telegrams of relay, this ampere of power supply and water pump 1's circuit switch on.

The water pump 1 starts to work, and the ponding liquid level of drainage basin descends, and similarly, when voltage U0 value reached the specified value (when the liquid level was enough low promptly), singlechip 4 control thyristor drive circuit 5, and thyristor 6 can't the on-current, and this ampere of power supply and water pump 1's circuit disconnection, water pump 1 stop work.

Claims (7)

1. The utility model provides a capacitive type is pumping device in pit for colliery which characterized in that: the method comprises the following steps: the device comprises a water pump (1), an intrinsic safety control power supply (2), a control circuit and an intrinsic safety power supply;

the direct current output end of the intrinsic safety power supply (2) is electrically connected with the control circuit, and the intrinsic safety power supply, the control circuit and the water pump (1) are sequentially connected in series;

the control circuit includes: the liquid level detection device comprises a liquid level detection sensor (3), a singlechip (4), a thyristor drive circuit (5), a thyristor (6) and a relay (7); the liquid level detection sensor (3) is connected with the input end of the single chip microcomputer (4), the output end of the single chip microcomputer (4) is connected with the thyristor drive circuit (5), the output end of the thyristor drive circuit (5) is connected with the control end of the thyristor (6), the thyristor (6) is connected in series in a positive circuit of a relay (7) coil, a relay (7) contact is connected in series in a circuit of an intrinsic safety power supply and the water pump (1), and the liquid level detection sensor (3) is a capacitance type liquid level sensor;

the water pump (1) is arranged in a drainage pool in a mine underground roadway, and the liquid level detection sensor (3) is arranged above the drainage pool in the mine underground roadway.

2. The coal mine capacitive downhole pumping device according to claim 1, wherein: the liquid level detection sensor (3) includes: the device comprises a capacitor barrel (31), an upper polar plate (32), a lower polar plate (33), a suspension plate (34) and a sensor measuring circuit; capacitor bucket (31) are fixed in the pit tunnel above the drainage pond, capacitor bucket (31) are one end opening and the decurrent barreled structure of opening, capacitor bucket (31) upper portion is fixed with upper plate (32), be provided with bottom plate (33) in capacitor bucket (31) of upper plate (32) below, and bottom plate (33) can slide from top to bottom capacitor bucket (31) relatively, bottom plate (33) below is provided with suspension board (34), and is connected through insulating branch between bottom plate (33) and suspension board (34), upper plate (32) and bottom plate (33) are connected with sensor measuring circuit electrical connection respectively, sensor measuring circuit signal voltage output and singlechip (4) electrical connection.

3. The coal mine capacitive downhole pumping device according to claim 2, wherein: the sensor measurement circuit includes: operational amplifier A, fixed capacitor C and power U, operational amplifier A's homophase input end and inverting input end link to each other with the positive negative pole of power U respectively, the fixed capacitor C has concatenated on operational amplifier A's the inverting input end circuit, just operational amplifier A inverting input end links to each other with bottom plate (33) electricity, operational amplifier A output links to each other with last polar plate (32) and singlechip (4) signal input part electricity.

4. A capacitive downhole water pumping device for coal mines as set forth in claim 2 or 3, wherein: the suspension plate (34) is a liquid thin plate with the density smaller than that of water, and the suspension plate (34) is horizontally arranged on the water surface in a drainage pool in a mine roadway.

5. The coal mine capacitive downhole pumping device according to claim 4, wherein: and a plurality of supporting columns are arranged on the lower surface of the suspension plate (34).

6. A capacitive downhole water pumping device for coal mines as set forth in claim 2 or 3, wherein: and a plurality of vent holes (35) are formed in the wall of the capacitor barrel (31) between the upper polar plate (32) and the lower polar plate (33).

7. The coal mine capacitive downhole pumping device according to claim 6, wherein: the outer wall of the capacitor barrel (31) is covered with a layer of sponge (36), and the sponge (36) can cover the vent hole (35).

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