Control circuit applied to magnet feeding device

Abstract

The utility model provides a control circuit applied to a magnet feeding device. The control circuit comprises a PLC module, a first inductive switch, a second inductive switch, a third inductive switch, a relay and an electromagnetic valve. Wherein the first inductive switch is powered by a direct-current power supply and is used for outputting an inductive signal to a first input pin of the PLC module when a magnet exists at a material taking position; the second inductive switch is connected between the negative electrode of the direct-current power supply and the second input pin of the PLC module and is configured to be closed when the piston rod of the feeding air cylinder is located at the initial position; the third inductive switch is connected between the negative electrode of the direct-current power supply and a third input pin of the PLC module and is configured to be closed when a piston rod of the feeding cylinder is in an extending state; the relay coil is connected between the first output pin of the PLC module and the positive electrode of the direct-current power supply; the relay contact and the electromagnetic valve coil are connected in series between the cathode and the anode of the direct-current power supply; the electromagnetic valve drives the feeding air cylinder in a reciprocating mode based on an external air source. According to the utility model, the problem of low automation degree of a strong magnet installation process in the prior art can be solved.

Description

Technical Field

[0001] The utility model belongs to the field of automatic feeding, and more specifically, relates to a control circuit applied to a magnet feeding device. Background Art

[0002] In the related art, a large number of electronic devices are charged through corresponding charging bases. In order to enable the electronic devices to be firmly adsorbed on the charging bases during the charging process, the existing charging bases usually adopt a structural design with built-in strong magnets.

[0003] Currently, on the assembly line of the charging base, the operation process of the strong magnet installation station is usually as follows: the operator first places a box of strong magnets on a wooden table, then manually separates a predetermined number of strong magnets from a plurality of adsorbed strong magnets, and then installs the strong magnets at the corresponding positions of the charging base. However, this manual separation method of strong magnets not only has low efficiency, but also has a large operation difficulty. It is easy to pinch the hand when separating the magnets, and gloves need to be worn for operation. At the same time, the operator is prone to fatigue under the state of long-term mechanical operation, which will undoubtedly further exacerbate the decline of the strong magnet installation efficiency. Therefore, for the above-mentioned strong magnet installation process, how to improve its automation degree is an urgent problem to be solved. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem of low automation degree of the strong magnet installation process in the related art.

[0005] In order to achieve the above purpose, the utility model provides a control circuit applied to a magnet feeding device, and the magnet feeding device has a feeding cylinder;

[0006] The control circuit includes a PLC module, a first induction switch, a second induction switch, a third induction switch, a relay and a solenoid valve. The relay includes a relay coil and a relay contact, and the solenoid valve includes a solenoid valve coil;

[0007] The first induction switch is powered by a DC power supply and is used to output an induction signal to the first input pin of the PLC module when there is a magnet at a predetermined material taking position;

[0008] The second induction switch is connected between the negative pole of the DC power supply and the second input pin of the PLC module, and is configured to be closed when the piston rod of the feeding cylinder is in the initial position;

[0009] The third induction switch is connected between the negative pole of the DC power supply and the third input pin of the PLC module, and is configured to be closed when the piston rod of the feeding cylinder is in the extended state;

[0010] The relay coil is connected between the first output pin of the PLC module and the positive pole of the DC power supply;

[0011] The relay contact and the solenoid valve coil are connected in series between the negative pole and the positive pole of the DC power supply;

[0012] The solenoid valve reciprocally drives the feeding cylinder based on an external air source.

[0013] Optionally, the control circuit further includes a start switch, and the start switch is connected between the negative pole of the DC power supply and the fourth input pin of the PLC module.

[0014] Optionally, the control circuit further includes an emergency stop switch, and the emergency stop switch is connected between the negative pole of the DC power supply and the fifth input pin of the PLC module.

[0015] Optionally, both the start switch and the emergency stop switch are push-button switches.

[0016] Optionally, the first induction switch is a Hall proximity switch.

[0017] Optionally, both the second induction switch and the third induction switch are magnetic switches;

[0018] A magnetic ring is sleeved on the part of the piston rod that is always located inside the feeding cylinder.

[0019] Optionally, the relay contact is a normally open contact.

[0020] Optionally, the control circuit further includes a buzzer, and the buzzer is connected between the second output pin of the PLC module and the positive pole of the DC power supply.

[0021] Optionally, the DC power supply is implemented by a power adapter connected to an AC power supply.

[0022] The beneficial effects of the present utility model are as follows:

[0023] The control circuit of the present utility model applied to the magnet feeding device detects whether there is a magnet at a predetermined material taking position based on the first induction switch, and determines the current state of the piston rod of the feeding cylinder based on the second induction switch and the third induction switch. When there is no magnet at the material taking position, the PLC module controls the signal state of its first output pin according to the corresponding signal state combinations of its first input pin, second input pin and third input pin, so that the relay coil is energized, and further the solenoid valve coil is energized. When the solenoid valve coil is energized, the solenoid valve drives the piston rod of the feeding cylinder based on an external air source to extend it from the initial position to the predetermined position. During the process of the piston rod extending from the initial position to the predetermined position, the target magnet that has been previously conveyed to the feeding position is separated from other magnets by a pusher piece matching the piston rod and pushed to the material taking position.

[0024] When the operator takes away the magnet from the material taking position, the PLC module controls the signal state of its first output pin according to the corresponding signal state combinations of its first input pin, second input pin and third input pin, so that the relay coil is de-energized, and further the solenoid valve coil is de-energized. When the solenoid valve coil is de-energized, the solenoid valve drives the piston rod of the feeding cylinder based on an external air source to retract it from the predetermined position to the initial position.

[0025] As can be seen from the above, the control circuit of the present utility model can cooperate with the corresponding mechanical structure to realize the automatic magnet feeding in the strong magnet installation process in the related art, thereby significantly improving the magnet installation efficiency of the charging base.

[0026] Other features and advantages of the present utility model will be described in detail in the following specific implementation part. Brief Description of the Drawings

[0027] The present utility model can be better understood by referring to the descriptions made in conjunction with the drawings in the following text, in which the same or similar reference numerals are used in all the drawings to represent the same or similar components.

[0028] Figure 1 Shows the circuit schematic diagram of the control circuit applied to the magnet feeding device according to an embodiment of the present utility model;

[0029] Figure 2 Shows the schematic diagram of the relative position relationship between the second induction switch and the third induction switch and the feeding cylinder according to an embodiment of the present utility model. Detailed Description of the Invention

[0030] In order to enable those skilled in the art to more fully understand the technical solution of the present utility model, the exemplary embodiments of the present utility model will be described more comprehensively and in detail below in conjunction with the accompanying drawings. Obviously, one or more of the embodiments of the present utility model described below are merely one or more of the specific ways to implement the technical solution of the present utility model, and are not exhaustive. It should be understood that other ways belonging to a general inventive concept of the present utility model can be used to implement the technical solution of the present utility model, and should not be limited by the exemplary embodiments described. All other embodiments obtained by those of ordinary skill in the art based on one or more embodiments of the present utility model without creative efforts should fall within the protection scope of the present utility model.

[0031] Embodiment: Figure 1 The circuit schematic diagram of the control circuit applied to the magnet feeding device according to the embodiment of the present utility model is shown. Figure 2 The schematic diagram of the relative position relationship between the second induction switch and the third induction switch and the feeding cylinder according to the embodiment of the present utility model is shown.

[0032] Referring to Figure 1 and Figure 2 The control circuit applied to the magnet feeding device according to the embodiment of the present utility model includes a PLC module 10, a first induction switch 20, a second induction switch 30, a third induction switch 40, a relay, and a solenoid valve 50. The relay includes a relay coil 61 and a relay contact 62. The solenoid valve 50 includes a solenoid valve coil 51.

[0033] The first induction switch 20 is powered by a DC power supply and is configured to output an induction signal to the first input pin of the PLC module 10 when a magnet exists at a predetermined material taking position.

[0034] The second induction switch 30 is connected between the negative pole of the DC power supply and the second input pin of the PLC module 10, and is configured to be closed when the piston rod 71 of the feeding cylinder 70 is in the initial position.

[0035] The third induction switch 40 is connected between the negative pole of the DC power supply and the third input pin of the PLC module 10, and is configured to be closed when the piston rod 71 of the feeding cylinder 70 is in the extended state.

[0036] The relay coil 61 is connected between the first output pin of the PLC module 10 and the positive pole of the DC power supply.

[0037] The relay contact 62 and the solenoid valve coil 51 are connected in series between the negative pole and the positive pole of the DC power supply.

[0038] The solenoid valve 50 reciprocally drives the feeding cylinder 70 based on an external air source 80.

[0039] Further, the control circuit applied to the magnet feeding device in the embodiment of the present utility model further includes a start switch 90, and the start switch 90 is connected between the negative pole of the DC power supply and the fourth input pin of the PLC module 10.

[0040] Still further, the control circuit applied to the magnet feeding device in the embodiment of the present utility model further includes an emergency stop switch 100, and the emergency stop switch 100 is connected between the negative pole of the DC power supply and the fifth input pin of the PLC module 10.

[0041] Still further, in the embodiment of the present utility model, both the start switch 90 and the emergency stop switch 100 are push-button switches.

[0042] Still further, in the embodiment of the present utility model, the first induction switch 20 is a Hall proximity switch.

[0043] Specifically, in the embodiment of the present utility model, the first induction switch 20 is implemented by a Hall proximity switch. The positive pole of the first induction switch 20 is connected to the positive pole of the DC power supply, the negative pole of the first induction switch 20 is connected to the negative pole of the DC power supply, and the signal output end of the first induction switch 20 is connected to the first input pin of the PLC module 10. When there is a magnet at the material taking position, the first induction switch 20 outputs an induction signal to the PLC module 10; when there is no magnet at the material taking position, the first induction switch 20 does not output an induction signal to the PLC module 10.

[0044] Still further, in the embodiment of the present utility model, both the second induction switch 30 and the third induction switch 40 are magnetic switches;

[0045] A magnetic ring 72 is sleeved on the part of the piston rod 71 that is always located inside the feeding cylinder 70.

[0046] Specifically, in the embodiment of the present utility model, when the piston rod 71 is in the initial position, the magnetic ring 72 is disposed opposite to the second induction switch 30, and at this time, the second induction switch 30 is in the closed state and the third induction switch 40 is in the open state; when the piston rod 71 is in the extended state, the magnetic ring 72 is disposed opposite to the third induction switch 40, and at this time, the second induction switch 30 is in the open state and the third induction switch 40 is in the closed state.

[0047] The second induction switch 30 is connected between the negative pole of the DC power supply and the second input pin of the PLC module 10. When the second induction switch 30 is closed, the second input pin of the PLC module 10 is in the low level state, and when the second induction switch 30 is open, the second input pin of the PLC module 10 is in the floating state.

[0048] The third induction switch 40 is connected between the negative pole of the DC power supply and the third input pin of the PLC module 10. When the third induction switch 40 is closed, the third input pin of the PLC module 10 is in a low level state. When the third induction switch 40 is open, the third input pin of the PLC module 10 is in a floating state.

[0049] Furthermore, in the embodiment of the present invention, the relay contact 62 is a normally open contact.

[0050] Furthermore, the control circuit of the magnet feeding device in the embodiment of the present invention further includes a buzzer 110. The buzzer 110 is connected between the second output pin of the PLC module 10 and the positive pole of the DC power supply.

[0051] Furthermore, in the embodiment of the present invention, the DC power supply is implemented by a power adapter 120 connected to an AC power supply.

[0052] Specifically, in the embodiment of the present invention, the power adapter 120 is connected to an AC power supply to provide a 24V DC power supply.

[0053] The working principle of the control circuit of the magnet feeding device of the present invention is specifically as follows:

[0054] When the control circuit is operating normally, that is, the start switch 90 is in the pressed state and the emergency stop switch 100 is in the unpressed state:

[0055] When there is no magnet at the material taking position and the piston rod 71 is in the initial position, the first input pin of the PLC module 10 does not receive an induction signal, the second input pin is in a low level state, and the third input pin is in a floating state. The PLC module 10 makes its first output pin in a low level state according to this signal state combination, so that the relay coil 61 is energized, the relay contact 62 is closed, and the solenoid valve coil 51 is energized. When the solenoid valve coil 51 is energized, the solenoid valve 50 drives the piston rod 71 of the feeding cylinder 70 based on the external air source 80 to extend it from the initial position to a predetermined position. During the process of the piston rod 71 extending from the initial position to the predetermined position, the target magnet pre-transported to the feeding position is separated from other magnets by a pushing member matching the piston rod 71 and pushed to the material taking position.

[0056] When the operator removes the magnet from the material taking position, the first input pin of the PLC module 10 does not receive an induction signal, the second input pin is in a floating state, and the third input pin is in a low level state. The PLC module 10 makes its first output pin in a floating state according to this signal state combination, so that the relay coil 61 loses power, the relay contact 62 disconnects, and the solenoid valve coil 51 loses power. When the solenoid valve coil 51 loses power, the solenoid valve 50 drives the piston rod 71 of the feeding cylinder 70 based on the external air source 80 to retract it from the predetermined position to the initial position.

[0057] Specifically, in the embodiment of the present invention, when a fault occurs, the PLC module 10 controls its second output pin to be in a low level state to make the buzzer 110 powered on, thereby giving an alarm. For example, when the second input pin and the third input pin of the PLC module 10 are both in a floating state or a low level state, it indicates that one of the second induction switch 30 and the third induction switch 40 may have a fault. At this time, the buzzer gives a fault alarm to the operator. Another example is that when the first input pin of the PLC module 10 receives an induction signal and the second input pin is in a low level state, it indicates that one of the first induction switch 20 and the second induction switch 30 may have a fault. At this time, the buzzer gives a fault alarm to the operator.

[0058] The control circuit of the embodiment of the present invention can cooperate with the corresponding mechanical structure to realize the automatic magnet feeding in the strong magnet installation process in the related art, and thus significantly improve the magnet installation efficiency of the charging base.

[0059] Although the above describes one or more embodiments of the present invention, those of ordinary skill in the art should know that the present invention can be implemented in any other form without departing from its gist and scope. Therefore, the above-described embodiments are illustrative rather than restrictive, and many modifications and substitutions are obvious to those of ordinary skill in the art in the technical field without departing from the spirit and scope of the present invention defined by the appended claims.

Claims

1. A control circuit applied to a magnet feeding device, characterized in that The described magnet feeding device has a feeding cylinder; The control circuit includes a PLC module, a first induction switch, a second induction switch, a third induction switch, a relay, and a solenoid valve. The relay includes a relay coil and a relay contact, and the solenoid valve includes a solenoid valve coil; The first induction switch is powered by a DC power supply and is configured to output an induction signal to the first input pin of the PLC module when a magnet exists at a predetermined material taking position; The second induction switch is connected between the negative pole of the DC power supply and the second input pin of the PLC module and is configured to close when the piston rod of the feeding cylinder is in the initial position; The third induction switch is connected between the negative pole of the DC power supply and the third input pin of the PLC module and is configured to close when the piston rod of the feeding cylinder is in the extended state; The relay coil is connected between the first output pin of the PLC module and the positive pole of the DC power supply; The relay contact and the solenoid valve coil are connected in series between the negative pole and the positive pole of the DC power supply; The solenoid valve reciprocally drives the feeding cylinder based on an external air source.

2. The control circuit applied to the magnet feeding device according to claim 1, characterized in that It further includes a start switch, and the start switch is connected between the negative pole of the DC power supply and the fourth input pin of the PLC module.

3. The control circuit applied to the magnet feeding device according to claim 2, characterized in that, It further includes an emergency stop switch, and the emergency stop switch is connected between the negative pole of the DC power supply and the fifth input pin of the PLC module.

4. The control circuit applied to the magnet feeding device according to claim 3, characterized in that Both the start switch and the emergency stop switch are push-button switches.

5. The control circuit applied to the magnet feeding device according to claim 1, wherein The first induction switch is a Hall proximity switch.

6. The control circuit applied to the magnet feeding device according to claim 1, wherein, Both the second induction switch and the third induction switch are magnetic switches; A magnetic ring is sleeved on the part of the piston rod that is always located inside the feeding cylinder.

7. The control circuit applied to the magnet feeding device according to claim 1, characterized in that, The relay contact is a normally open contact.

8. The control circuit applied to the magnet feeding device according to claim 1, characterized in that, It further includes a buzzer, and the buzzer is connected between the second output pin of the PLC module and the positive pole of the DC power supply.

9. The control circuit applied to the magnet feeding device according to claim 1, wherein, The DC power supply is realized by a power adapter connected to an AC power supply.

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