CN214843524U - Mining water level sensor calibrating device - Google Patents

Abstract

The utility model relates to the technical field of coal mine safety instrument and meter verification and calibration, in particular to a mine water level sensor calibration device, which comprises a control mechanism, a base, a clamping mechanism and a detection mechanism; the control mechanism, the clamping mechanism and the detection mechanism are all arranged on the base; the control mechanism is used for controlling the detection signal output of the detection mechanism; the clamping mechanism is used for clamping the water level sensor; the detection mechanism comprises a pressure detection assembly and a pressure adjusting assembly, wherein the pressure detection assembly comprises a sensor pressure detection piece and a standard pressure detection piece. The utility model discloses an adopt pressure measurement subassembly and pressure adjustment subassembly to constitute detection mechanism for behind pressure measurement subassembly detection level sensor's the pressure value and the standard pressure value, finely tune level sensor's pressure value through the pressure adjustment subassembly, equal with standard pressure value after making level sensor's the pressure value calibration, realize level sensor's calibration regulation.

Description

Mining water level sensor calibrating device

Technical Field

The utility model relates to a colliery safety instrument and meter examination, calibration technical field specifically are a mining level sensor calibrating device.

Background

The mine water level sensor is a special instrument for monitoring the water level change of the mine water sump, can automatically convert the water level of the mine water sump into a standard electric signal and transmit the standard electric signal to associated equipment, can accurately display the water level of the mine water sump, and meets the water level monitoring requirement of daily production in the coal mine industry.

At present, in the field of measurement and calibration of coal mine safety instruments, the detection or calibration of a mine water level sensor is a blank, and whether the mine water level sensor is accurate or not directly affects the safety of personnel and property of a coal mine, so that equipment capable of accurately measuring the mine water level sensor is urgently needed to detect and calibrate the precision of the mine water level sensor.

Disclosure of Invention

An object of the utility model is to provide a mining level sensor calibrating device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a mining water level sensor calibration device comprises a control mechanism, a base, a clamping mechanism and a detection mechanism; the control mechanism, the clamping mechanism and the detection mechanism are all arranged on the base; the control mechanism is used for controlling the detection signal output of the detection mechanism; the clamping mechanism is used for clamping the water level sensor; the detection mechanism comprises a pressure detection assembly and a pressure adjusting assembly, the pressure detection assembly comprises a sensor pressure detection piece and a standard pressure detection piece, the pressure value of the water level sensor is finely adjusted through the pressure adjusting assembly after the pressure detection assembly detects the pressure value and the standard pressure value of the water level sensor, and the pressure value of the water level sensor is equal to the standard pressure value after being calibrated.

Preferably, in the above calibration device for a mining water level sensor, the control mechanism includes a console and a touch screen disposed on the console; a PLC controller is arranged in the console and is electrically connected with the touch screen; the PLC is also connected with an external computer through a lead.

Based on above-mentioned technical characteristics, the touch screen can be used for the input control signal, sends control signal for the PLC controller can control detection mechanism and carry out pressure detection and pressure adjustment, guarantees the convenience of device operation.

Preferably, in the calibration device for the water level sensor for the mine, the clamping mechanism comprises a lower clamping part and an upper clamping part, and a first guide groove and a second guide groove for the lower clamping part and the upper clamping part to adjust and guide are formed in the base; the first guide groove and the second guide groove are perpendicular to each other; the lower end clamping part comprises a first knob, a first sliding seat and a first screw rod; the first screw rod penetrates through the inside of the first guide groove, and one end of the first screw rod extends to the outer side of the base and is connected with a first knob; the sliding seat is sleeved outside the first screw rod and is in sliding connection with the first guide groove; the upper end clamping part comprises a second knob, two second sliding seats and a second screw rod; the second screw rod penetrates through the inside of the second guide groove, and one end of the second screw rod extends to the outer side of the base and is connected with a second knob; and the two sliding seats are sleeved on the outer sides of the screw rods and are in sliding connection with the guide grooves II.

Based on the technical characteristics, the first knob can drive the first screw rod to rotate, so that the first sliding seat slides in the first guide groove, and the distance between the first sliding seat and the upper end clamping part is changed; the second knob can drive the second screw rod to rotate, so that the second two sliding seats slide in the second guide groove, the distance between the second two sliding seats is changed, the upper end portions of the two pairs of water level sensors of the two sliding seats of the upper end clamping portion are clamped, the lower end portions of the two pairs of water level sensors of the two sliding seats of the lower end clamping portion abut against the lower end portions of the two pairs of water level sensors, and stable clamping of the two pairs of water level sensors and the device is achieved.

Preferably, in the above calibration device for the water level sensor for the mine, the clamping mechanism further includes a clamping member for clamping the conductive contact of the water level sensor, and the clamping member is movably disposed at one end of the console close to the upper clamping portion.

Based on the technical characteristics, the clamping piece on one side of the control console can clamp and fix the conductive connector of the water level sensor, so that the conductive connector of the water level sensor is prevented from being extruded and deformed, and the water level sensor after detection and calibration can be stably used.

Preferably, in the calibration device for the water level sensor for mines, the detection mechanism further includes a pressing member for pressing the sensor pressure detection member and the standard pressure detection member, so that the sensor pressure detection member and the standard pressure detection member can detect the generated pressure signal.

Based on the technical characteristics, the pressure applying part applies pressure to the sensor pressure detecting part and the standard pressure detecting part at the same time to obtain a sensor pressure value and a standard pressure value, so that whether the detected water level sensor needs to be calibrated or not is judged through the comparison of the values of the sensor pressure value and the standard pressure value.

Preferably, in the above calibration device for the water level sensor for the mine, the pressing member includes an air pump, a pressing plate, a fixing plate, a pressing base, a first air bag and a second air bag; the air pump is fixed at the top end of the first sliding seat, and the output end of the air pump is connected with a four-way pipe; the pressing plates are connected to two ends of the pressing seat, and the pressing seat is arranged in one side of the sliding seat in a sliding manner; the fixed plates are connected to two ends of the first sliding seat and are attached to the pressing plates; the first air bag is arranged between the pressing plate and the fixing plate, and the second air bag is arranged inside the first sliding seat; the first air bag and the second air bag are respectively connected with three output pipe ports of the four-way pipe through pipelines; the standard pressure detection piece is arranged in the first sliding seat on one side of the second air bag and is abutted against the second air bag.

Based on the technical characteristics, the air pump injects air to the first air bag and the second air bag, so that the pressure plate and the fixing plate exert pressure on the induction head of the water level sensor under the action of the first inflated air bag, and the two pairs of standard pressure detection pieces of the inflated air bag exert pressure, so that the pressure value of the sensor and the standard pressure value are synchronously detected, and the detection error is avoided.

Preferably, in the above calibration device for a mine water level sensor, the inflation volume of the second air bag is equal to the sum of the inflation volumes of the first air bags; the pipe diameter of the connecting pipe between the air bag II and the four-way pipe is equal to twice of that of the connecting pipe between the air bag I and the four-way pipe.

Based on the technical characteristics, when the air pump injects air into the first air bag and the second air bag, the pressure of the sensing head of the water level sensor given by the first air bag and the pressure of the standard pressure detection piece given by the second air bag can be kept consistent, so that the pressure values of the water level sensor and the standard pressure detection piece under the same pressure are obtained, and whether the water level sensor needs to be calibrated or not is judged according to the detected pressure values.

Preferably, in the calibration device for the water level sensor for the mine, an arc-shaped groove is formed in the center of the pressure seat, and an elastic support member is arranged at the bottom end of the arc-shaped groove; and one side of the pressure seat facing the upper end clamping part is at least provided with a first pressure sensor, so that the first pressure sensor forms a first sensor pressure detection part, the first air bag and the second air bag are synchronously inflated through an air pump of the pressure applying part, the first sensor pressure detection part and the standard pressure detection part are synchronously pressed, and the pressure value and the standard pressure value of the water level sensor are obtained.

Based on the technical characteristics, the arc-shaped groove arranged in the center of the pressure seat can be used for accommodating a connecting rod of the water level sensor, and the elastic supporting piece can be better contacted with the connecting rod of the water level sensor so as to be attached to the connecting rods of the water level sensors with different sizes and ensure the stable support of the water level sensor; the first pressure sensor can detect pressure when the pressure applying part applies pressure to the induction head of the water level sensor, and then the pressure value of the water level sensor is obtained; a plurality of pressure sensor one can obtain the pressure output signal of water level sensor's inductive head different positions, makes the water level sensor pressure signal who acquires more accurate through a plurality of numerical value contrasts.

Preferably, in the above calibration device for a mining water level sensor, guide rods parallel to each other are fixed to two sides of the top of the base through brackets respectively; the free ends of the pressing plate and the fixed plate are connected in a sliding mode through the guide rod.

Based on above-mentioned technical characteristics, the guide arm can supply clamp plate and fixed plate joint support as support piece, guarantees that clamp plate and fixed plate can be along the guide arm steady movement when the casting die during operation, avoids clamp plate and fixed plate free end unsettled to cause and rocks, reduces the testing result to the pressure measurement subassembly and causes the influence.

Preferably, in the above calibration device for the mining water level sensor, the external computer is further connected with a standard temperature sensor, a high-precision a/D converter and a 485-232 converter; and the standard temperature sensor and the standard pressure detection piece are both connected with the high-precision A/D converter.

Based on the technical characteristics, the high-precision A/D converter can convert the detection signals of the standard temperature sensor and the standard pressure detection part into digital signals, and then the digital signals are input into an external computer through the 485-232 converter for operation, so that the calculated values are used as the detection value calibration standard reference value of the water level sensor, and the detection signal values of the water level sensor are compared.

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

1) according to the mining water level sensor calibration device, the clamping pieces, the adjustable lower end clamping part and the upper end clamping part are adopted to fixedly clamp the water level sensors with different sizes, so that the stability of the water level sensors during pressure testing is ensured, and detection errors are avoided;

2) this mining water level sensor calibrating device constitutes detection mechanism through adopting pressure measurement subassembly and pressure regulating assembly for after pressure measurement subassembly detected water level sensor's pressure value and standard pressure value, finely tune water level sensor's pressure value through pressure regulating assembly, make water level sensor's pressure value after the calibration equal with standard pressure value, realize water level sensor's calibration regulation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of a partial top-down structure of the joint between the pressing member and the lower clamping portion of the present invention;

fig. 3 is a schematic view of the local side-cut structure of the pressing member of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a touch screen; 2. a console; 3. a clamping member; 4. a base; 41. a second guide groove; 42. a first guide groove; 5. a guide bar; 6. applying a pressing piece; 61. an air pump; 62. pressing a plate; 63. a fixing plate; 64. pressing a base; 65. an elastic support member; 66. a first air bag; 67. a second air bag; 68. a first pressure sensor; 7. a lower end clamping portion; 71. a first knob; 72. a first sliding seat; 73. a first screw rod; 8. an upper end clamping portion; 81. a second knob; 82. a second sliding seat; 83. a second screw; 9. and a standard pressure detection piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a mining water level sensor calibration device comprises a control mechanism, a base 4, a clamping mechanism and a detection mechanism; the control mechanism, the clamping mechanism and the detection mechanism are all arranged on the base 4; the control mechanism is used for controlling the detection signal output of the detection mechanism; the clamping mechanism is used for clamping the water level sensor; the detection mechanism comprises a pressure detection assembly and a pressure adjusting assembly, the pressure detection assembly comprises a sensor pressure detection piece and a standard pressure detection piece 9, and after the pressure detection assembly detects the pressure value and the standard pressure value of the water level sensor, the pressure adjusting assembly finely adjusts the pressure value of the water level sensor to enable the pressure value of the water level sensor to be equal to the standard pressure value after being calibrated;

please refer to fig. 1 in the drawings of the specification: the control mechanism comprises a console 2 and a touch screen 1 arranged on the console 2; a PLC (programmable logic controller) is arranged in the console 2 and is electrically connected with the touch screen 1; the PLC is also connected with an external computer through a wire; in this embodiment, the touch screen 1 may be used to input a control signal and send the control signal to the PLC controller, so that the PLC controller may control the detection mechanism to perform pressure detection and pressure adjustment, thereby ensuring convenience in operation of the device;

please refer to fig. 1 in the drawings of the specification: the clamping mechanism comprises a lower clamping part 7 and an upper clamping part 8, and a first guide groove 42 and a second guide groove 41 for adjusting and guiding the lower clamping part 7 and the upper clamping part 8 are formed in the base 4; the first guide groove 42 and the second guide groove 41 are perpendicular to each other; the lower end clamping part 7 comprises a first knob 71, a first sliding seat 72 and a first screw 73; the first screw rod 73 penetrates through the inner part of the first guide groove 42, and one end of the first screw rod 73 extends to the outer side of the base 4 and is connected with a first knob 71; the first sliding seat 72 is sleeved outside the first screw rod 73 and is in sliding connection with the first guide groove 42; the upper end clamping part 8 comprises a second knob 81, two second sliding seats 82 and a second screw 83; the second screw 83 penetrates through the second guide groove 41, and one end of the second screw 83 extends to the outer side of the base 4 and is connected with a second knob 81; the two sliding seats 82 are sleeved on the outer side of the screw rod 83 and are in sliding connection with the guide groove 41; in this embodiment, the first knob 71 can drive the first screw 73 to rotate, so that the first sliding seat 72 slides in the first guide groove 42, and the distance between the first sliding seat 72 and the upper clamping portion 8 is changed; the second knob 81 can drive the second screw 83 to rotate, so that the second sliding seats 82 slide in the second guide groove 41, the distance between the second sliding seats 82 is changed, the upper end part of the water level sensor is clamped by the second sliding seats 82 of the upper clamping part 8, and the first sliding seats 72 of the lower clamping part 7 abut against the lower end part of the water level sensor, so that stable clamping of the water level sensor and the device is realized;

in this embodiment, the anti-slip rubber pads are arranged on the side of the first sliding seat 72 facing the upper clamping part 8 and the opposite surfaces of the second sliding seats 82, so that the phenomenon that the water level sensor slips in the clamping process is avoided, and the first sliding seat 72 and the second sliding seats 82 are prevented from rigidly clamping the water level sensor;

please refer to fig. 1 in the drawings of the specification: the clamping mechanism further comprises a clamping piece 3 for clamping the conductive connector of the water level sensor, and the clamping piece 3 is movably arranged at one end, close to the upper end clamping part 8, of the console 2; in the embodiment, the clamping piece 3 is a fixing clamp, and the conductive connector of the water level sensor can be clamped and fixed through the clamping piece 3 on one side of the console 2, so that the conductive connector of the water level sensor is prevented from being extruded and deformed, and the water level sensor after detection and calibration can be stably used;

please refer to fig. 1 in the drawings of the specification: the detection mechanism further comprises a pressing piece 6 for pressing the sensor pressure detection piece and the standard pressure detection piece 9, so that the sensor pressure detection piece and the standard pressure detection piece 9 can detect the generated pressure signals; in the embodiment, the pressure applying part 6 applies pressure to the sensor pressure detecting part and the standard pressure detecting part 9 at the same time to obtain a sensor pressure value and a standard pressure value, so that whether the detected water level sensor needs to be calibrated or not is judged by comparing the values of the sensor pressure value and the standard pressure value;

please refer to fig. 1-2 in the drawings of the specification: the pressing piece 6 comprises an air pump 61, a pressing plate 62, a fixing plate 63, a pressing seat 64, a first air bag 66 and a second air bag 67; the air pump 61 is fixed at the top end of the sliding seat I72, and the output end of the air pump 61 is connected with a four-way pipe; the pressing plates 62 are connected to two ends of a pressing seat 64, and the pressing seat 64 is arranged inside one side of the sliding seat I72 in a sliding manner; the fixed plates 63 are connected to two ends of the sliding seat I72 and are attached to the pressing plates 62; the first air bag 66 is arranged between the pressing plate 62 and the fixing plate 63, and the second air bag 67 is arranged inside the first sliding seat 72; the first air bag 66 and the second air bag 67 are respectively connected with three output pipe ports of the four-way pipe through pipelines; the standard pressure detection piece 9 is arranged inside the sliding seat I72 on one side of the air bag II 67 and is abutted against the air bag II 67; in the embodiment, the air pump 61 injects air into the first air bag 66 and the second air bag 67, so that the pressure plate 62 and the fixing plate 63 press the sensing head of the water level sensor under the action of the first inflated air bag 66, and the second inflated air bag 67 presses the standard pressure detecting part 9, so that the pressure value of the sensor and the standard pressure value are synchronously detected, and the detection error is avoided;

please refer to fig. 1-2 in the drawings of the specification: the inflation capacity of the second air bag 67 is equal to the sum of the inflation capacities of the first air bags 66; the pipe diameter of the connecting pipe between the air bag II 67 and the four-way pipe is equal to twice of that of the connecting pipe between the air bag I66 and the four-way pipe; in this embodiment, when the air pump 61 injects air into the first air bag 66 and the second air bag 67, it can be ensured that the pressure applied to the sensing head of the water level sensor by the first air bags 66 is consistent with the pressure applied to the standard pressure detecting element 9 by the second air bags 67, so as to obtain the pressure values of the water level sensor and the standard pressure detecting element 9 under the same pressure, so as to determine whether the water level sensor needs to be calibrated according to the detected pressure values;

please refer to fig. 2-3 in the drawings of the specification: wherein, the center of the pressing base 64 is provided with an arc-shaped groove, and the bottom end of the arc-shaped groove is provided with an elastic supporting piece 65; at least four pressure sensors 68 are arranged on one side of the pressure seat 64 facing the upper end clamping part 8, so that the pressure sensors 68 form a sensor pressure detection part, the air bags 66 and the air bags 67 are synchronously inflated by the air pump 61 of the pressurizing part 6, the sensor pressure detection part and the standard pressure detection part 9 are synchronously pressurized, and the pressure value and the standard pressure value of the water level sensor are obtained; in this embodiment, the arc-shaped groove arranged in the center of the pressure seat 64 can be used for accommodating the connecting rod of the water level sensor, and the elastic support 65 can be better contacted with the connecting rod of the water level sensor, so as to attach the connecting rods of the water level sensors with different sizes, and ensure the stable support of the water level sensor; the first pressure sensor 68 is arranged to detect the pressure when the pressing member 6 presses the sensing head of the water level sensor, so as to obtain the pressure value of the water level sensor; the first pressure sensors 68 can obtain pressure output signals of different positions of the sensing head of the water level sensor, and the obtained pressure signals of the water level sensor are more accurate through comparison of a plurality of values;

in this embodiment, the supporting gap of the elastic supporting member 65 can be changed by elastic expansion and contraction, so as to meet different use requirements, and the elastic supporting member 65 is in the prior art and will not be described more herein;

please refer to fig. 1 in the drawings of the specification: wherein, the two sides of the top of the base 4 are respectively fixed with guide rods 5 which are parallel to each other through a bracket; the free ends of the pressure plate 62 and the fixed plate 63 are connected with the guide rod 5 in a sliding way; in this embodiment, the guide rod 5 can be used as a supporting member for connecting and supporting the pressing plate 62 and the fixing plate 63, so that the pressing plate 62 and the fixing plate 63 can stably move along the guide rod 5 when the pressing member 6 works, thereby avoiding the swinging caused by the suspension of the free ends of the pressing plate 62 and the fixing plate 63, and reducing the influence on the detection result of the pressure detection assembly;

wherein, the external computer is also connected with a standard temperature sensor, a high-precision A/D converter and a 485-232 converter; the standard temperature sensor and the standard pressure detection piece 9 are both connected with a high-precision A/D converter; in this embodiment, after the high-precision a/D converter converts the detection signals of the standard temperature sensor and the standard pressure detection element 9 into digital signals, the digital signals are input to an external computer through a 485-232 converter for operation, so that the calculated values are used as the detection values of the water level sensor to calibrate the standard reference values, and the detection signal values of the water level sensor are compared;

in this embodiment, the pipelines connecting the first air bag 66 and the second air bag 67 with the four-way pipe are provided with electromagnetic valves; when the electromagnetic valve is completely opened, the pressure plate 62, the fixing plate 63, the pressure seat 64 and the first air bag 66 form a pressure piece, and a sensor pressure detection piece formed by the first pressure sensor 68 is matched for carrying out pressure detection on the water level sensor; when the electromagnetic valve on the connecting pipeline of the second air bag 67 is closed, the pressure plate 62, the fixing plate 63, the pressure seat 64 and the first air bag 66 form a pressure adjusting assembly, the distance between the pressure plate 62 and the fixing plate 63 is changed through continuous air injection of the first air bag 66 until the pressure signal value detected by the sensor pressure detecting piece formed by the first pressure sensor 68 on one side of the pressure seat 64 is consistent with the detection signal value of the standard pressure detecting piece 9, and fine adjustment and calibration of the water level sensor are realized;

in this embodiment, the pressure signal that pressure measurement subassembly detected can transmit for external computer through the PLC controller and show to the pressure value's that carries out calibration operation through the pressure numerical difference control pressure adjustment subassembly that shows pressure value.

Principle of operation

When the mining water level sensor calibrating device is used, firstly, the water level sensor to be detected is fixed through the adjustment of the lower end clamping part 7 and the upper end clamping part 8, then, air is injected into the air bag I66 and the air bag II 67 through the air pump 61 of the pressing part 6, so that the pressing plate 62 and the fixing plate 63 press the induction head of the water level sensor under the action of the inflated air bag I66, the inflated air bag II 67 presses the standard pressure detecting part 9, the pressure value of the sensor and the standard pressure value are synchronously detected, and the pressure value of the sensor and the standard pressure value are obtained;

when the pressure value of the sensor is equal to the standard pressure value, the water level sensor does not need to be calibrated;

when the pressure value of the sensor is deviated from the standard pressure value, the electromagnetic valve on the connecting pipeline of the second air bag 67 is closed, the pressure plate 62, the fixing plate 63, the pressure seat 64 and the first air bag 66 form a pressure adjusting assembly, the distance between the pressure plate 62 and the fixing plate 63 is changed through continuous air injection of the first air bag 66 until the pressure signal value detected by the sensor pressure detecting piece formed by the first pressure sensor 68 on one side of the pressure seat 64 is consistent with the detection signal value of the standard pressure detecting piece 9, and fine adjustment and calibration of the water level sensor are achieved.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (10)

1. The utility model provides a mining water level sensor calibrating device which characterized in that: comprises a control mechanism, a base (4), a clamping mechanism and a detection mechanism; the control mechanism, the clamping mechanism and the detection mechanism are all arranged on the base (4); the control mechanism is used for controlling the detection signal output of the detection mechanism; the clamping mechanism is used for clamping the water level sensor; the detection mechanism comprises a pressure detection assembly and a pressure adjusting assembly, the pressure detection assembly comprises a sensor pressure detection piece and a standard pressure detection piece (9), and after the pressure detection assembly detects the pressure value and the standard pressure value of the water level sensor, the pressure value of the water level sensor is finely adjusted through the pressure adjusting assembly, so that the pressure value of the water level sensor is equal to the standard pressure value after being calibrated.

2. The mining water level sensor calibration device of claim 1, characterized in that: the control mechanism comprises a console (2) and a touch screen (1) arranged on the console (2); a PLC (programmable logic controller) is arranged in the console (2) and is electrically connected with the touch screen (1); the PLC is also connected with an external computer through a lead.

3. The mining water level sensor calibration device according to claim 2, characterized in that: the clamping mechanism comprises a lower end clamping part (7) and an upper end clamping part (8), and a first guide groove (42) and a second guide groove (41) which are used for adjusting and guiding the lower end clamping part (7) and the upper end clamping part (8) are arranged on the base (4); the first guide groove (42) and the second guide groove (41) are perpendicular to each other; the lower end clamping part (7) comprises a first knob (71), a first sliding seat (72) and a first screw rod (73); the first screw rod (73) penetrates through the inner part of the first guide groove (42), one end of the first screw rod (73) extends to the outer side of the base (4) and is connected with a first knob (71); the first sliding seat (72) is sleeved on the outer side of the first screw rod (73) and is in sliding connection with the first guide groove (42); the upper end clamping part (8) comprises a second knob (81), two second sliding seats (82) and a second screw rod (83); the second screw rod (83) penetrates through the inside of the second guide groove (41), one end of the second screw rod (83) extends to the outer side of the base (4) and is connected with a second knob (81); and the two second sliding seats (82) are sleeved on the outer side of the second screw rod (83) and are in sliding connection with the second guide groove (41).

4. The mining water level sensor calibration device of claim 3, characterized in that: the clamping mechanism further comprises a clamping piece (3) used for clamping the conductive connector of the water level sensor, and the clamping piece (3) is movably arranged at one end, close to the upper end clamping part (8), of the console (2).

5. A mining water level sensor calibration device according to claim 3 or 4, characterized in that: the detection mechanism further comprises a pressing piece (6) which is used for pressing the sensor pressure detection piece and the standard pressure detection piece (9) so that the sensor pressure detection piece and the standard pressure detection piece (9) can detect the generated pressure signals.

6. The mining water level sensor calibration device of claim 5, wherein: the pressing piece (6) comprises an air pump (61), a pressing plate (62), a fixing plate (63), a pressing seat (64), a first air bag (66) and a second air bag (67); the air pump (61) is fixed at the top end of the sliding seat I (72), and the output end of the air pump (61) is connected with a four-way pipe; the pressing plates (62) are connected to two ends of the pressing base (64), and the pressing base (64) is arranged in one side of the sliding base I (72) in a sliding mode; the fixed plates (63) are connected to two ends of the sliding seat I (72) and are attached to the pressing plates (62); the first air bag (66) is arranged between the pressing plate (62) and the fixing plate (63), and the second air bag (67) is arranged inside the first sliding seat (72); the air bag I (66) and the air bag II (67) are respectively connected with three output pipe ports of the four-way pipe through pipelines; the standard pressure detection piece (9) is arranged inside the sliding seat I (72) on one side of the air bag II (67) and is abutted against the air bag II (67).

7. The mining water level sensor calibration device of claim 6, wherein: the inflation capacity of the second air bag (67) is equal to the sum of the inflation capacities of the first air bags (66); the pipe diameter of the connecting pipe between the air bag II (67) and the four-way pipe is equal to twice of the pipe diameter of the connecting pipe between the air bag I (66) and the four-way pipe.

8. The mining water level sensor calibration device of claim 6, wherein: an arc-shaped groove is formed in the center of the pressing seat (64), and an elastic supporting piece (65) is arranged at the bottom end of the arc-shaped groove; one side of the pressure seat (64) facing the upper end clamping part (8) is at least provided with four first pressure sensors (68), the first pressure sensors (68) form a first sensor pressure detection piece, the first air bag (66) and the second air bag (67) are synchronously inflated through an air pump (61) of the pressing piece (6), the first sensor pressure detection piece and the standard pressure detection piece (9) are synchronously pressed, and the pressure value and the standard pressure value of the water level sensor are obtained.

9. The mining water level sensor calibration device of claim 6, wherein: guide rods (5) which are parallel to each other are respectively fixed on two sides of the top of the base (4) through brackets; the free ends of the pressure plate (62) and the fixed plate (63) are connected with the guide rod (5) in a sliding manner.

10. The mining water level sensor calibration device of claim 6, wherein: the external computer is also connected with a standard temperature sensor, a high-precision A/D converter and a 485-232 converter; and the standard temperature sensor and the standard pressure detection piece (9) are both connected with a high-precision A/D converter.

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