Magnetic disk protection circuit of magnetic drill press

Abstract

The utility model provides a magnetic drill disk protection circuit, which comprises a voltage input end, a voltage output end, a motor switch, a rectifier bridge circuit, a photoelectric switch, a silicon controlled rectifier and a disk short circuit 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 short-circuit switch corresponds to that of the magnetic disk, and when the magnetic force generated by the magnetic disk is insufficient or cannot be generated due to damage, the photoelectric switch and the silicon controlled rectifier are conducted, so that the short-circuit switch is used for disconnecting a power supply of a motor in the drilling machine 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 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 magnetic drills, due to the lack of daily maintenance of the equipment, the insulation performance of the disk coil is damaged, the fuse is blown, and many other factors will cause the disk to lose its proper function. When the disk is damaged and the magnetic field cannot reach the preset magnetic attraction or the 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 base drilling disk protection circuit to solve the technical problem in the prior art that the magnetic base drill has no ability to detect the magnetic attraction of the disk.

[0004] To achieve the above purpose, the technical solution adopted by the present application is: to provide a magnetic base drill disk 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 photoelectric switch, having a third input terminal and a third input terminal, and a first output terminal and a second output terminal corresponding to the third input terminal, the third input terminal and the first output terminal are both electrically connected to the positive electrode of the rectifier bridge circuit, and the fourth input terminal is electrically connected to the second wire;

[0010] A thyristor having a fifth input terminal, a sixth input terminal and a third output terminal, wherein the fifth input terminal is electrically connected to the second wire, and the sixth input terminal is electrically connected to the second output terminal;

[0011] a short-circuit switch, the position of which corresponds to the position of the disk, the input end of the short-circuit switch being electrically connected to the third output end, and the output end of the short-circuit switch being electrically connected to the fourth wiring port;

[0012] The short-circuit switch has a first state and a second state. When the short-circuit switch is in the first state, the short-circuit switch disconnects the first wiring port and the fourth wiring port. When the short-circuit switch is in the second state, the short-circuit switch connects the first wiring port and the fourth wiring port.

[0013] Optionally, a first resistor is provided between the third input terminal and the positive electrode of the rectifier bridge circuit.

[0014] Optionally, a first unidirectional diode is provided between the first resistor and the first output end.

[0015] Optionally, a plurality of second unidirectional diodes are provided between the positive pole of the magnetic disk and the positive pole of the rectifier bridge circuit.

[0016] Optionally, a second resistor is provided between the second input terminal and the sixth input terminal.

[0017] Optionally, a varistor is provided on the second wire.

[0018] Optionally, there is a first diode on the first conductive line.

[0019] 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.

[0020] Optionally, the magnetic disk comprises two coils connected in series.

[0021] Optionally, it also includes:

[0022] The disk switch is arranged at the voltage output end.

[0023] The beneficial effect of the magnetic base drill disk protection circuit provided by the present application is that: compared with the prior art, the magnetic base drill disk magnetic field detection protection device provided by the present application includes a voltage input terminal and a voltage output terminal, a motor switch, a rectifier bridge circuit, a photoelectric switch, a thyristor, and a disk short-circuit 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 short-circuit 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 photoelectric switch and the thyristor are turned on, so that the short-circuit 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

[0024] 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 creative labor.

[0025] Figure 1 A schematic diagram of the structure of a magnetic drill disk protection circuit provided in an embodiment of the present application.

[0026] Among them, the reference numerals in the figure are:

[0027] 1. Voltage input terminal; 2. Voltage output terminal; 3. Motor switch; 4. Rectifier bridge circuit; 5. Disk; 6. Photoelectric switch; 7. Thyristor; 8. Short-circuit switch; 9. Disk switch; 10. First wiring port; 11. Second wiring port; 12. Third wiring port; 13. Fourth wiring port; 14. Motor; 15. First wire; 16. Third unidirectional diode; 17. Fourth unidirectional diode; 18. Third input terminal; 19. Fourth input terminal; 20. First output terminal; 21. Second output terminal; 22. Fifth input terminal; 23. Sixth input terminal; 24. Third output terminal; 25. First resistor; 26. First unidirectional diode; 27. Second unidirectional diode; 28. Second resistor; 29. ​​Varistor; 30. Second wire; 31. Third wire. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] See also Figure 1 , the magnetic base drill disk protection circuit provided in the embodiment of the present application is now described.

[0033] A magnetic base drill disk protection circuit comprises a voltage input terminal 1, a voltage output terminal 2, a motor 14, a switch 3, a rectifier bridge circuit 4, a disk 5, a photoelectric switch 6, a thyristor 7, a short-circuit switch 8 and a disk switch 9.

[0034] The voltage input terminal 1 is the "live wire" in the alternating current, and the voltage output terminal 2 is the "neutral wire" in the alternating current. The voltage input terminal 1 has a first connection port 10, and the voltage output terminal 2 has a second connection port 11. The disk switch 9 is arranged at the voltage output terminal 2.

[0035] The motor 14 switch 3 is electrically connected to the first wiring port 10 and the second wiring port 11, and the motor 14 switch 3 has a third wiring port 12 and a fourth wiring port 13. When the motor 14 switch 3 conducts the first wiring port 10 and the third wiring port 12, and conducts the second wiring port 11 and the fourth wiring port 13, at this time, the motor 14 electrically connected between the third wiring port 12 and the fourth wiring port 13 is powered on and rotates, and the motor 14 is the motor 14 in the magnetic base rotary drilling mechanism. When the motor 14 switch 3 closes the first wiring port 10 and the third wiring port 12, and closes the second wiring port 11 and the fourth wiring port 13, at this time, the motor 14 electrically connected between the third wiring port 12 and the fourth wiring port 13 is powered off and stops rotating.

[0036] 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 15, and a third unidirectional diode 16 is provided on the first wire 15. The second input terminal is electrically connected to the voltage output terminal 2 through a second wire 30, and a varistor 29 is provided on the second wire 30. The positive electrode of the rectifier bridge circuit 4 is electrically connected to the third wiring port 12 through a third wire 31.

[0037] 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 connected in series, and the coils generate a magnetic field after being energized. A fourth unidirectional diode 17 is provided between the positive pole of the rectifier bridge circuit 4 and the negative pole of the rectifier bridge circuit 4, and the fourth unidirectional diode 17 is connected in parallel with the disk 5.

[0038] The photoelectric switch 6 has a third input terminal 18 and a fourth input terminal 19, and a first output terminal 20 and a second output terminal 21 corresponding to the third input terminal 18, the third input terminal 18 and the first output terminal 20 are both electrically connected to the positive pole of the rectifier bridge circuit 4, and the fourth input terminal 19 is electrically connected to the second wire 30.

[0039] The thyristor 7 has a fifth input terminal 22 , a sixth input terminal 23 and a third output terminal 24 . The fifth input terminal 22 is electrically connected to the second wire 30 , and the sixth input terminal 23 is electrically connected to the second output terminal 21 .

[0040] The position of the short-circuit switch 8 corresponds to the position of the disk 5 , the input end of the short-circuit switch 8 is electrically connected to the third output end 24 , and the output end of the short-circuit switch 8 is electrically connected to the fourth wiring port 13 ;

[0041] The short-circuit switch 8 has a first state and a second state. After the disk switch 9 and the motor 14 switch 3 are closed, and the coil is energized to generate a magnetic field and the magnetic field strength meets the preset strength, the short-circuit switch 8 is in the first state. At this time, the short-circuit switch 8 disconnects the first wiring port 10 and the fourth wiring port 13, so that the motor 14 can be powered on and work normally.

[0042] When the coil generates a magnetic field after being energized and the magnetic field strength does not meet the preset strength, and the coil is damaged and cannot generate a magnetic field, the short-circuit switch 8 is in the second state, and at this time, the short-circuit switch 8 connects the first connection port 10 and the fourth connection port 13. At this time, the motor 14 is equivalent to being short-circuited and cannot rotate.

[0043] In the present application, a first resistor 25 is provided between the third input terminal 18 and the positive electrode of the rectifier bridge circuit 4. A first unidirectional diode 26 is provided between the first resistor 25 and the first output terminal 20. A plurality of second unidirectional diodes 27 are provided between the positive electrode of the disk 5 and the positive electrode of the rectifier bridge circuit 4. A second resistor 28 is provided between the second input terminal and the sixth input terminal 23. A varistor 29 is provided on the second wire.

[0044] Compared with the prior art, the magnetic base drilling disk 5 magnetic field detection protection device provided in the present application includes a voltage input terminal 1 and a voltage output terminal 2, a motor 14 switch 3, a rectifier bridge circuit 4, a disk 5, a photoelectric switch 6, a thyristor 7, and a disk 5 short-circuit switch 8. The motor 14 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 14 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 short-circuit switch 8 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 photoelectric switch 6 and the thyristor 7 are turned on, so that the short-circuit switch 8 is used to disconnect the power supply of the motor 14 in the drilling machine to prevent the motor 14 in the drilling machine from continuing to rotate.

[0045] The above description is only a preferred embodiment of the present application and is 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 base drilling disk protection circuit, 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 photoelectric switch having a third input terminal and a third input terminal, and a first output terminal and a second output terminal corresponding to the third input terminal, the third input terminal and the first output terminal are both electrically connected to the positive electrode of the rectifier bridge circuit, and the fourth input terminal is electrically connected to the second wire; A thyristor having a fifth input terminal, a sixth input terminal and a third output terminal, wherein the fifth input terminal is electrically connected to the second wire, and the sixth input terminal is electrically connected to the second output terminal; a short-circuit switch, the position of which corresponds to the position of the disk, the input end of the short-circuit switch being electrically connected to the third output end, and the output end of the short-circuit switch being electrically connected to the fourth wiring port; The short-circuit switch has a first state and a second state. When the short-circuit switch is in the first state, the short-circuit switch disconnects the first wiring port and the fourth wiring port. When the short-circuit switch is in the second state, the short-circuit switch connects the first wiring port and the fourth wiring port.

2. The magnetic base drill disk protection circuit as claimed in claim 1, characterized in that: A first resistor is provided between the third input terminal and the positive electrode of the rectifier bridge circuit.

3. The magnetic base drill disk protection circuit as claimed in claim 2, characterized in that: A first unidirectional diode is provided between the first resistor and the first output terminal.

4. The magnetic base drill disk protection circuit as claimed in claim 3, characterized in that: A plurality of second unidirectional diodes are arranged between the positive pole of the magnetic disk and the positive pole of the rectifier bridge circuit.

5. The magnetic base drill disk protection circuit as claimed in claim 4, characterized in that: A second resistor is provided between the second input terminal and the sixth input terminal.

6. The magnetic base drill disk protection circuit according to claim 1 or 5, characterized in that: A varistor is arranged on the second conducting wire.

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

8. The magnetic base drill disk protection circuit as claimed in claim 7, 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.

9. The magnetic base drill disk protection circuit as claimed in claim 8, characterized in that: The magnetic disk includes two coils connected in series.

10. The magnetic base drill disk protection circuit 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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