Slurry pump stroke frequency sensor and winch encoder detector

Abstract

The utility model relates to a slurry pump stroke frequency sensor and winch encoder detector. The slurry pump stroke frequency sensor and winch encoder detector is composed of a base, a stepping motor module, a pump stroke sensor fixing module, a hollow shaft photoelectric encoder fixing module, a computer, a controller and a stepping motor driver. The device is characterized in that the pump stroke sensor fixing module and the hollow shaft photoelectric encoder fixing module are fixed to the two sides of the base respectively, the stepping motor module is fixed to the middle of the base, and a stepping motor of the stepping motor module is sequentially connected with the computer, the controller and the stepping motor driver. The beneficial effects of the utility model are that the variable-frequency rotating speed of the stepping motor is used as a motion platform to simulate the working states of the winch, the turntable and the slurry pump, and the real-time rotating speed of the turntable and the slurry pump and the height of the traveling block can be accurately calculated. The automation degree is high, the precision is high, and the on-site use standard can be reached through on-site verification.

Description

Technical Field

[0001] The utility model relates to the field of measurement detection, in particular to a mud pump stroke sensor and a winch encoder detector. Background Art

[0002] The winch, turntable and mud pump play a very important role in the oil drilling process. The traveling block lifts and lowers the drilling tools, the turntable provides power for the drilling tools, and the mud pump is one of the main equipment in the mud circulation system. The height of the traveling block, the real-time speed of the turntable and the mud pump can help the driller understand the working status of the drilling.

[0003] The current method of measuring the number of strokes of the mud pump and the number of encoder revolutions generally uses a timer to calculate the number of times the proximity switch is on and off within a specified time. Since the proximity switch may not be in the on state within the specified time, that is, the last on and off of the proximity switch is not during the timer time, resulting in data loss, this method has a large error; if it meets actual needs, it requires enough sampled data to calculate the average value, which wastes time and reduces work efficiency. Summary of the invention

[0004] The purpose of the utility model is to overcome the problem of large error or low efficiency in the existing timer measuring the number of mud pump strokes and encoder turns, and to provide a mud pump stroke sensor and a winch encoder detector. By simulating the turntable and triggering the proximity switch sensor when the mud pump is working, the rotation speed of the turntable and the number of mud pump strokes are measured. By simulating the drum driving the encoder to rotate when the winch is working, the number of turns of the winch is measured, and the current height of the drilling rig traveling block is calculated. In the utility model, a controller is used to control the stepper motor to drive the induction pointer and the transmission shaft to rotate, and the counting method of the timer is abandoned. Each time the proximity switch is turned on and off, the controller records the time, which perfectly solves the above-mentioned problems.

[0005] The technical solution of the utility model is:

[0006] A mud pump stroke sensor and winch encoder detector, consisting of a base, a stepper motor module, a pump stroke sensor fixing module, a hollow shaft photoelectric encoder fixing module, a computer, a controller, and a stepper motor driver; characterized in that the pump stroke sensor fixing module and the hollow shaft photoelectric encoder fixing module are respectively fixed on both sides of the base, the stepper motor module is fixed in the middle of the base, and the stepper motor of the stepper motor module is connected to the computer, the controller and the stepper motor driver in sequence.

[0007] The stepper motor module consists of a fixed plate, a stepper motor, a sensing pointer, and a flexible coupling. The stepper motor is a dual-axis output stepper motor; the fixed plate is fixed to the middle of the base, the stepper motor is fixed to the fixed plate, the flexible coupling is fixed to the output shaft on one side of the stepper motor, and the sensing pointer is fixed to the output shaft on the other side of the stepper motor.

[0008] The pump stroke sensor fixing module is composed of a pump stroke sensor fixing plate, two screw handles, and two V-shaped clamps. The pump stroke sensor fixing plate is fixed on one side of the base and is located on the proximity sensing pointer side. Two rectangular frames for installing V-shaped clamps are provided on the pump stroke sensor fixing plate. Two threaded handles are respectively inserted from both sides of the pump stroke sensor fixing plate and connected to the V-shaped clamps placed in the rectangular frames. Each threaded handle drives the V-shaped clamp to move in the rectangular frame.

[0009] The hollow shaft photoelectric encoder module consists of two hollow shaft photoelectric encoder fixing rods, two encoder screw handles, and two encoder V-shaped clamps. The two hollow shaft photoelectric encoder fixing rods are respectively fixed on one side of the base and are located close to the flexible coupling side. Each encoder threaded handle passes through a hollow shaft photoelectric encoder fixing rod from the outside and is connected to an encoder V-shaped clamp.

[0010] When the utility model is used, the pump stroke sensor to be inspected is fixed in two V-shaped clamps of the pump stroke sensor fixing module. Since the sensing pointer is installed on the output shaft of the stepper motor close to one side of the pump stroke sensor, under the control of the computer, the output shaft of the stepper motor drives the sensing pointer to rotate through the controller and the stepper motor driver. The rotation speed of the output shaft is set in the computer. During this process, each time the sensing pointer passes through the sensing range of the pump stroke sensor, a switch on-off signal is sent out. The controller records the time difference between the two on-off signals in seconds. One minute divided by this time difference is the turntable speed and the pump stroke speed. The hollow shaft photoelectric encoder is installed on the stepper motor through a flexible coupling. The hollow shaft photoelectric encoder is fixed between two encoder V-clamps by adjusting the distance of the encoder threaded handle on the hollow shaft photoelectric encoder fixing rod. The flexible coupling drives the hollow shaft photoelectric encoder to rotate one circle for each rotation of the stepper motor. The real-time pulse value of the hollow shaft photoelectric encoder in the controller is read and divided by the resolution of the hollow shaft photoelectric encoder to calculate the number of rotations of the hollow shaft photoelectric encoder, that is, the number of rotations of the winch. Combined with the number of layers, number of turns and diameter of the wire rope wound on the winch at the beginning, the current height of the traveling block can be calculated.

[0011] The principle of the utility model is to install an inductive proximity switch sensor and a hollow shaft photoelectric encoder on the sensor fixing plate, and drive the sensing pointer and the flexible coupling to rotate through a stepper motor. When the sensing pointer approaches the pump stroke sensor, the magnetic field around the pump stroke sensor is changed to trigger the pump stroke sensor switch; the time difference between the two pump stroke sensor switches is recorded, and the frequency of the switch on and off within one minute is calculated, that is, the speed of the turntable and the number of strokes of the mud pump. For each rotation of the stepper motor, the flexible coupling drives the hollow shaft photoelectric encoder to rotate one circle accordingly. The real-time pulse value of the hollow shaft photoelectric encoder is divided by the resolution of the hollow shaft photoelectric encoder to calculate the number of rotations of the hollow shaft photoelectric encoder, that is, the number of rotations of the winch; combined with the number of layers, number of turns and diameter of the wire rope wound on the winch at the beginning, the current height of the traveling block can be calculated.

[0012] The beneficial effect of the utility model is that the variable frequency speed of the stepping motor is used as a motion platform to simulate the working state of the winch, turntable and mud pump, and the real-time speed of the turntable and mud pump and the height of the traveling block can be accurately calculated. It has a high degree of automation and high precision, and has been verified on site to meet the standards for on-site use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model. DETAILED DESCRIPTION

[0014] The utility model is described in detail below in conjunction with the accompanying drawings: The controller 13 and the stepper motor driver 14 of the utility model are existing structures and are purchased directly.

[0015] like Figure 1As shown, the utility model is composed of a base 1, a stepper motor module, a pump stroke sensor fixed module, a hollow shaft photoelectric encoder fixed module, a computer 12, a controller 13, and a stepper motor driver 14; it is characterized in that: the pump stroke sensor fixed module and the hollow shaft photoelectric encoder fixed module are respectively fixed on both sides of the base 1, the stepper motor module is fixed in the middle of the base 1, and the stepper motor 7 of the stepper motor module is connected with the computer 12, the controller 13 and the stepper motor driver 14 in sequence; the stepper motor module is composed of a fixed plate 9, a stepper motor 7, a sensing pointer 5, and a flexible coupling 10, and the stepper motor 7 is a dual-axis output stepper motor; the fixed plate 9 is fixed in the middle of the base 1, the stepper motor 7 is fixed on the fixed plate 9, the flexible coupling 10 is fixed to the left output shaft of the stepper motor 7 with a screw 8, and the sensing pointer 5 is fixed to the right output shaft of the stepper motor 7 with a screw 8 ; The pump stroke sensor fixing module is composed of a pump stroke sensor fixing plate 2, two screw handles 3, and two V-shaped clamps 4. The pump stroke sensor fixing plate 2 is fixed on the right side of the base 1 and is located on the side of the proximity sensing pointer 5. Two rectangular frames for installing V-shaped clamps are provided on the pump stroke sensor fixing plate 2. The two threaded handles 3 are respectively inserted from both sides of the pump stroke sensor fixing plate 2 and connected to the V-shaped clamps 4 placed in the rectangular frames. Each threaded handle 3 drives the V-shaped clamp to move in the rectangular frame; the hollow shaft photoelectric encoder module is composed of two hollow shaft photoelectric encoder fixing rods 11, two encoder screw handles, and two encoder V-shaped clamps. The two hollow shaft photoelectric encoder fixing rods 11 are respectively fixed on the left side of the base 1 and are located close to both sides of the flexible coupling 10. Each encoder threaded handle passes through a hollow shaft photoelectric encoder fixing rod 11 from the outside and is connected to an encoder V-shaped clamp.

[0016] The computer 12 and the controller 13 are connected via a network cable. The controller 13 controls the start and stop of the stepper motor 7 by transmitting a pulse signal to the stepper motor driver 14. The stepper motor driver 14 is connected to the stepper motor 7 via a communication cable. Under the operation control of the computer 12, the relevant instructions are transmitted to the controller 13 via the network cable. The controller 13 parses the received instructions and transmits them to the stepper motor driver 14.

[0017] Control the movement of the stepper motor 7 to make the flexible coupling 10 and the sensing pointer 5 do circular motion according to the parameters set in the computer 12; the pump stroke sensor to be tested is on the side of the dual-axis output stepper motor 7 close to the pump stroke sensor fixing plate 2, and the distance is adjusted by the threaded handle 3 and fixed in the V-clamp 4. Every time the sensing pointer 5 approaches the pump stroke sensor to be tested in the V-clamp 4, the proximity switch of the pump stroke sensor to be tested is turned on once, and the counter in the controller 13 is increased by 1. The controller 13 calculates the time difference between the two connections of the pump stroke sensor in seconds. By dividing 60 by this time difference, the turntable speed (number of revolutions per minute, RPM) and pump stroke rate (mud pump strokes per minute, SPM) can be calculated; by reading the counter accumulation The value can be used to calculate the cumulative pump strokes of the mud pump; on the side of the dual-axis output stepper motor 7 close to the hollow shaft photoelectric encoder fixing rod 11, the distance of the encoder threaded handle on the hollow shaft photoelectric encoder fixing rod 11 is adjusted to fix the hollow shaft photoelectric encoder to be inspected between the two encoder V-type clamps. When the stepper motor 7 rotates one circle, the flexible coupling 10 drives the hollow shaft photoelectric encoder to rotate one circle; by reading the current value of the hollow shaft photoelectric encoder in the controller 13 and dividing it by the resolution of the hollow shaft photoelectric encoder, the number of rotations of the hollow shaft photoelectric encoder, that is, the number of rotations of the winch, can be calculated. Combined with the number of layers, number of circles and diameter of the wire rope wound on the winch at the beginning, the number of rotations of the winch and the height of the traveling block can be obtained. In the computer 12, different speeds can be set for the stepper motor 7 to achieve frequency conversion effect, simulating the winch speed, turntable speed and strokes of the mud pump under different working conditions.

Claims

1. A mud pump stroke sensor and winch encoder detector, consisting of a base, a stepper motor module, a pump stroke sensor fixing module, a hollow shaft photoelectric encoder fixing module, a computer, a controller, and a stepper motor driver; characterized in that: The pump stroke sensor fixed module and the hollow shaft photoelectric encoder fixed module are respectively fixed on both sides of the base, the stepper motor module is fixed in the middle of the base, and the stepper motor of the stepper motor module is connected with the computer, the controller and the stepper motor driver in sequence.

2. A mud pump stroke sensor and winch encoder detector according to claim 1, characterized in that: The stepper motor module consists of a fixed plate, a stepper motor, a sensing pointer, and a flexible coupling. The stepper motor is a dual-axis output stepper motor; the fixed plate is fixed to the middle of the base, the stepper motor is fixed to the fixed plate, the flexible coupling is fixed to the output shaft on one side of the stepper motor, and the sensing pointer is fixed to the output shaft on the other side of the stepper motor.

3. A mud pump stroke sensor and winch encoder detector according to claim 2, characterized in that: The pump stroke sensor fixing module is composed of a pump stroke sensor fixing plate, two screw handles, and two V-shaped clamps. The pump stroke sensor fixing plate is fixed on one side of the base and is located on the proximity sensing pointer side. Two rectangular frames for installing V-shaped clamps are provided on the pump stroke sensor fixing plate. Two threaded handles are respectively inserted from both sides of the pump stroke sensor fixing plate and connected to the V-shaped clamps placed in the rectangular frames. Each threaded handle drives the V-shaped clamp to move in the rectangular frame.

4. A mud pump stroke sensor and winch encoder detector according to claim 2, characterized in that: The hollow shaft photoelectric encoder module consists of two hollow shaft photoelectric encoder fixing rods, two encoder screw handles, and two encoder V-shaped clamps. The two hollow shaft photoelectric encoder fixing rods are respectively fixed on one side of the base and are located close to the flexible coupling side. Each encoder threaded handle passes through a hollow shaft photoelectric encoder fixing rod from the outside and is connected to an encoder V-shaped clamp.

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