Magnetic drill disk magnetic field detection protection circuit

Abstract

The utility model provides a magnetic drill disk magnetic field detection protection circuit, which comprises a voltage input end, a voltage output end, a motor switch, a rectifier bridge circuit and a disk magnetic induction switch, and is characterized in that the motor switch is electrically connected between the voltage input end and the voltage output end and is used for controlling a motor in a drilling machine to start or stop; the rectifier bridge circuit is used for performing half-wave rectification on alternating current, the anode of the magnetic disk is electrically connected with the anode of the rectifier bridge circuit, and the cathode end of the magnetic disk is electrically connected with the cathode of the rectifier bridge circuit to generate magnetic force; the position of the magnetic induction switch corresponds to the position of the magnetic disk, and when the magnetic force generated by the magnetic disk is insufficient or cannot be generated due to damage, the magnetic induction switch is used for disconnecting a power supply of a motor in the drilling machine so as to prevent the motor in the drilling machine from continuously rotating.

Description

Technical Field

[0001] The present application belongs to the technical field of drilling machine protection devices, and more specifically, to a magnetic base drill disk magnetic field detection protection circuit. Background Art

[0002] Magnetic drills are widely used in industrial manufacturing and large-scale infrastructure construction. When in use, the switch of the magnetic disk on the magnetic drill is turned on to magnetically attract the magnetic base to the target workpiece, so that the drilling machine in the magnetic drill can drill holes in the target workpiece. However, during the use of the magnetic drill, the magnetic drill only has simple functions such as connecting and disconnecting the power of the disk and starting and stopping the motor in the drilling machine. When the magnetic disk is damaged and the magnetic field cannot reach the preset magnetic attraction or the magnetic disk has no magnetic attraction, the disk cannot fix the drilling machine on the workpiece, and at this time, the motor in the drilling machine can still continue to run, which brings safety hazards to the operator. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a magnetic field detection protection circuit for a magnetic base drilling disk, so as to solve the technical problem in the prior art that the magnetic base is unable to detect the magnetic attraction of the disk.

[0004] In order to achieve the above purpose, the technical solution adopted by the present application is: to provide a magnetic base drill disk magnetic field detection protection circuit, including:

[0005] A voltage input terminal and a voltage output terminal, wherein the voltage input terminal has a first connection port and the voltage output terminal has a second connection port;

[0006] a motor switch, electrically connected to the first wiring port and the second wiring port, and having a third wiring port and a fourth wiring port, the motor switch being used to conduct the first wiring port and the third wiring port, and being used to conduct the second wiring port and the fourth wiring port;

[0007] A rectifier bridge circuit, having a first input terminal and a second input terminal, wherein the first input terminal is electrically connected to the voltage input terminal through a first wire, the second input terminal is electrically connected to the voltage output terminal through a second wire, and the positive electrode of the rectifier bridge circuit is electrically connected to the third wiring port through a third wire;

[0008] A magnetic disk, wherein the positive pole of the magnetic disk is electrically connected to the positive pole of the rectifier bridge circuit, and the negative pole of the magnetic disk is electrically connected to the negative pole of the rectifier bridge circuit;

[0009] A magnetic induction switch, the position of which corresponds to the position of the magnetic disk, the input end of the magnetic induction switch is electrically connected to the third wire, and the output end of the magnetic induction switch is electrically connected to the fourth wiring port;

[0010] The magnetic induction switch has a first state and a second state. When the magnetic induction switch is in the first state, the magnetic induction switch disconnects the first wiring port and the fourth wiring port. When the magnetic induction switch is in the second state, the magnetic induction switch connects the first wiring port and the fourth wiring port.

[0011] Optionally, a varistor is provided on the second wire.

[0012] Optionally, there is a first diode on the first conductive line.

[0013] Optionally, a second diode is provided between the positive electrode of the rectifier bridge circuit and the negative electrode of the rectifier bridge circuit, and the second diode is connected in parallel with the magnetic disk.

[0014] Optionally, the magnetic disk comprises two coils connected in series.

[0015] Optionally, it also includes:

[0016] A disk switch is provided at the voltage output terminal

[0017] The beneficial effect of the magnetic base drill disk magnetic field detection protection circuit provided by the present application is that: compared with the prior art, the magnetic base drill disk magnetic field detection protection circuit provided by the present application includes a voltage input terminal and a voltage output terminal, a motor switch, a rectifier bridge circuit, and a disk magnetic induction switch. The motor switch is electrically connected between the voltage input terminal and the voltage output terminal, and is used to control the start or stop of the motor in the drilling machine; the rectifier bridge circuit is used to perform half-wave rectification on the alternating current, the positive pole of the disk is electrically connected to the positive pole of the rectifier bridge circuit, and the negative pole of the disk is electrically connected to the negative pole of the rectifier bridge circuit to generate magnetic force; the position of the magnetic induction switch corresponds to the position of the disk. When the magnetic force generated by the disk is insufficient or cannot generate magnetic force due to damage, the magnetic induction switch is used to disconnect the power supply of the motor in the drilling machine to prevent the motor in the drilling machine from continuing to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of the structure of a magnetic field detection protection circuit for a magnetic drill bit provided in an embodiment of the present application;

[0020] Among them, the reference numerals in the figure are:

[0021] 1. Voltage input terminal; 2. Voltage output terminal; 3. Motor switch; 4. Rectifier bridge circuit; 5. Disk; 6. Magnetic induction switch; 7. Disk switch; 8. First wiring port; 9. Second wiring port; 10. Third wiring port; 11. Fourth wiring port; 12. Motor; 13. First wire; 14. Second wire; 15. Varistor; 16. Coil; 17. Third wire; 18. First diode; 19. Second diode. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] See also Figure 1 , the magnetic field detection protection circuit of the magnetic base drill disk provided in the embodiment of the present application is now described.

[0027] A magnetic field detection protection circuit for a magnetic base drill disk comprises a voltage input terminal 1, a voltage output terminal 2, a motor switch 3, a rectifier bridge circuit 4, a disk 5, a magnetic induction switch 6 and a disk switch 7.

[0028] The voltage input terminal 1 is the "live wire" in the alternating current, the voltage output terminal 2 is the "neutral wire" in the alternating current, the voltage input terminal 1 has a first connection port 8, and the voltage output terminal 2 has a second connection port 9. The disk switch 7 is arranged at the voltage output terminal 2.

[0029] The motor switch 3 is electrically connected to the first wiring port 8 and the second wiring port 9. The motor switch 3 has a third wiring port 10 and a fourth wiring port 11. When the motor switch 3 conducts the first wiring port 8 and the third wiring port 10, and conducts the second wiring port 9 and the fourth wiring port 11, at this time, the motor 12 electrically connected between the third wiring port 10 and the fourth wiring port 11 is powered on and rotates. The motor 12 is the motor 12 in the magnetic base rotary drilling mechanism. When the motor switch 3 closes the first wiring port 8 and the third wiring port 10, and closes the second wiring port 9 and the fourth wiring port 11, at this time, the motor 12 electrically connected between the third wiring port 10 and the fourth wiring port 11 is powered off and stops rotating.

[0030] The rectifier bridge circuit 4 has a first input terminal and a second input terminal. The first input terminal is electrically connected to the voltage input terminal 1 through a first wire 13, and a first diode 18 is provided on the first wire 13. The second input terminal is electrically connected to the voltage output terminal 2 through a second wire 14, and a varistor 15 is provided on the second wire 14. The positive electrode of the rectifier bridge circuit 4 is electrically connected to the third wiring port 10 through a third wire 17.

[0031] The positive pole of the disk 5 is electrically connected to the positive pole of the rectifier bridge circuit 4, and the negative pole of the disk 5 is electrically connected to the negative pole of the rectifier bridge circuit 4. The rectifier bridge circuit 4 performs half-wave rectification on the alternating current and supplies power to the disk 5. The disk 5 includes two coils 16 connected in series, and the coils 16 generate a magnetic field after being energized. A second diode 19 is provided between the positive pole of the rectifier bridge circuit 4 and the negative pole of the rectifier bridge circuit 4, and the second diode 19 is connected in parallel with the disk 5.

[0032] The position of the magnetic induction switch 6 corresponds to the position of the magnetic disk 5 , the input end of the magnetic induction switch 6 is electrically connected to the third wire 17 , and the output end of the magnetic induction switch 6 is electrically connected to the fourth connection port 11 .

[0033] The magnetic induction switch 6 has a first state and a second state.

[0034] After the disk switch 7 and the motor switch 3 are closed, and the coil 16 is energized to generate a magnetic field and the magnetic field strength meets the preset strength, the magnetic induction switch 6 is in the first state, and at this time, the magnetic induction switch 6 disconnects the first wiring port 8 and the fourth wiring port 11, so that the motor 12 can be powered on and work normally.

[0035] When the coil 16 generates a magnetic field after being energized and the magnetic field strength does not meet the preset strength, and the coil 16 is damaged and cannot generate a magnetic field, the magnetic induction switch 6 is in the second state, and at this time, the magnetic induction switch 6 connects the first wiring port 8 and the fourth wiring port 11. At this time, the motor 12 is equivalent to being short-circuited and cannot rotate.

[0036] Compared with the prior art, the magnetic field detection protection device for the magnetic base drill disk 5 provided in the present application includes a voltage input terminal 1 and a voltage output terminal 2, a motor switch 3, a rectifier bridge circuit 4, and a magnetic induction switch 6 for the disk 5. The motor switch 3 is electrically connected between the voltage input terminal 1 and the voltage output terminal 2, and is used to control the start or stop of the motor 12 in the drilling machine; the rectifier bridge circuit 4 is used to perform half-wave rectification on the alternating current, the positive pole of the disk 5 is electrically connected to the positive pole of the rectifier bridge circuit 4, and the negative terminal of the disk 5 is electrically connected to the negative pole of the rectifier bridge circuit 4 to generate magnetic force; the position of the magnetic induction switch 6 corresponds to the position of the disk 5. When the magnetic force generated by the disk 5 is insufficient or cannot generate magnetic force due to damage, the magnetic induction switch 6 is used to disconnect the power supply of the motor 12 in the drilling machine to prevent the motor 12 in the drilling machine from continuing to rotate.

[0037] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A magnetic field detection protection circuit for a magnetic drill bit, characterized in that: include: A voltage input terminal and a voltage output terminal, wherein the voltage input terminal has a first connection port and the voltage output terminal has a second connection port; a motor switch, electrically connected to the first wiring port and the second wiring port, and having a third wiring port and a fourth wiring port, the motor switch being used to conduct the first wiring port and the third wiring port, and being used to conduct the second wiring port and the fourth wiring port; A rectifier bridge circuit, having a first input terminal and a second input terminal, wherein the first input terminal is electrically connected to the voltage input terminal through a first wire, the second input terminal is electrically connected to the voltage output terminal through a second wire, and the positive electrode of the rectifier bridge circuit is electrically connected to the third wiring port through a third wire; A magnetic disk, wherein the positive pole of the magnetic disk is electrically connected to the positive pole of the rectifier bridge circuit, and the negative pole of the magnetic disk is electrically connected to the negative pole of the rectifier bridge circuit; A magnetic induction switch, the position of which corresponds to the position of the magnetic disk, the input end of the magnetic induction switch is electrically connected to the third wire, and the output end of the magnetic induction switch is electrically connected to the fourth wiring port; The magnetic induction switch has a first state and a second state. When the magnetic induction switch is in the first state, the magnetic induction switch disconnects the first wiring port and the fourth wiring port. When the magnetic induction switch is in the second state, the magnetic induction switch connects the first wiring port and the fourth wiring port.

2. The magnetic field detection protection circuit of the magnetic base drill disk as claimed in claim 1, characterized in that: A varistor is arranged on the second conducting wire.

3. The magnetic field detection protection circuit of the magnetic base drill disk as claimed in claim 2, characterized in that: A first diode is provided on the first conductive line.

4. The magnetic field detection protection circuit of the magnetic base drill disk as claimed in claim 3, characterized in that: A second diode is provided between the positive electrode of the rectifier bridge circuit and the negative electrode of the rectifier bridge circuit, and the second diode is connected in parallel with the magnetic disk.

5. The magnetic field detection protection circuit of the magnetic base drill disk as claimed in claim 4, characterized in that: The magnetic disk includes two coils connected in series.

6. The magnetic field detection protection circuit for a magnetic drill bit according to claim 1 or 5, characterized in that: Also includes; The disk switch is arranged at the voltage output end.

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