Electrical safety protection control device of corrugated board line stacking elevator

Abstract

The utility model discloses an electrical safety protection control device for a corrugated board line stacking elevator, belongs to the technical field of safety protection of stacking elevators, and solves the problem that safety accidents are caused as the limiting protection function of the conventional elevator is easy to lose efficacy. The safety protection control device comprises a stand column and an electrical cabinet, a lifting frame used for lifting and stacking is arranged on the stand column, a first limiting switch used for controlling the lifting height of the lifting frame is arranged on the stand column, and a third limiting switch used for controlling the descending height of the lifting frame is arranged below the stand column. A fourth limiting switch used for preventing collision is arranged on the stand column above the first limiting switch, an infrared photoelectric switch SQ1 is arranged in the middle of the lifting frame, and a limiting plate is arranged on the lifting frame. According to the electrical safety protection control device of the corrugated board line stacking elevator, under the condition that the elevator ascends abnormally, a power supply loop can be rapidly cut off, and safety is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety protection of stacking elevators, in particular to an electrical safety protection control device for a stacking elevator of a corrugated cardboard line. Background Art

[0002] Although the lifting motor of the corrugated cardboard stacking elevator is equipped with overload protection and limit protection functions, the main contacts of the AC contactor that controls the lifting motor will cause arcing between the main contacts due to frequent operation, which will burn the engagement or make the limit protection function invalid, and the elevator cannot be driven down normally, causing the elevator to rise and hit the top, causing the lifting motor to stall. If the operator is not paying attention or the overload protection KR fails, the following safety problems are very likely to occur: the lifting chain breaks, causing the elevator to fall and injure people, or damage equipment; the lifting motor burns and causes its brake device to fail, causing the elevator to fall and injure people, or damage equipment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to address the above-mentioned deficiencies in the prior art and provide an electrical safety protection control device for a corrugated cardboard line stacking elevator. In the event of abnormal ascent of the elevator, the power supply circuit can be quickly cut off, thereby effectively improving safety. The utility model has the characteristics of wide applicability and strong practicality.

[0004] The technical solution adopted by the utility model is: an electrical safety protection control device for a corrugated cardboard line stacking elevator, comprising a column and an electrical cabinet, wherein a lifting frame for lifting and stacking is provided on the column, a first limit switch for controlling the rising height of the lifting frame is provided on the column, a third limit switch for controlling the descending height of the lifting frame is provided below the column, a fourth limit switch for anti-collision is provided on the column above the first limit switch, an infrared photoelectric switch SQ1 is provided in the middle position of the lifting frame, a limit plate is provided on the lifting frame, a control component for controlling the movement of the elevator is provided in the electrical cabinet, and the first limit switch, the third limit switch and the fourth limit switch are all electrically connected to the control component.

[0005] As a further improvement, a second limit switch is provided above the first limit switch, a fifth limit switch is provided above the fourth limit switch, the second limit switch and the first limit switch are connected to the control component, and the fourth limit switch and the fifth limit switch are connected to the control component.

[0006] Furthermore, the control component includes a first AC contactor, a second AC contactor KM22, a third AC contactor, a first time relay, and a second time relay.

[0007] Furthermore, the fourth limit switch, the fifth limit switch and the third AC contactor are connected in series between two power supply terminals of the control circuit.

[0008] Furthermore, a thermal relay is provided in the electrical cabinet, and the thermal relay is connected to the motor.

[0009] Furthermore, the limiting plate includes an upper plate and a lower plate, and the upper plate and the lower plate are respectively arranged on the upper and lower sides of the lifting frame.

[0010] Beneficial effects

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The utility model relates to an electrical safety protection control device for a corrugated cardboard line stacking elevator. By upgrading and renovating the original electrical protection function of the lifting motor, the first limit switch SQ2 and the second limit switch SQ3 are used to limit the lifting height of the elevator, and the fourth limit switch SQ5 and the fifth limit switch SQ6 are installed to limit the high position of the elevator when it rises and hits the top. Through multiple electrical protection controls, in the case of abnormal lifting of the elevator, the elevator rises and hits the top, the limit plate presses the fourth limit switch SQ5 or the fifth limit switch SQ6, and the third AC contactor KM33 is disconnected due to power failure, cutting off the power supply circuit and the control power supply circuit of the lifting motor, thereby preventing safety accidents from occurring. The utility model has the characteristics of strong practicality and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 This is the electrical control principle diagram of the utility model.

[0015] Among them: 1-column, 2-lifting frame, 3-motor, 4-limit plate, 5-electrical cabinet, 6-control component, SQ1-infrared photoelectric switch, SQ2-first limit switch, SQ3-second limit switch, SQ4-third limit switch, SQ5-fourth limit switch, SQ6-fifth limit switch, KM11-first AC contactor, KM22-second AC contactor, KM33-third AC contactor, KT1-first time relay, KT2-second time relay, KR-thermal relay. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0017] See Figure 1-2As shown, the utility model is an electrical safety protection control device for a stacking elevator of a corrugated cardboard line, comprising a column 1 and an electrical cabinet 5. A lifting frame 2 for lifting and stacking is provided on the column 1. A first limit switch SQ2 for controlling the rising height of the lifting frame 2 is provided on the column 1. A third limit switch SQ4 for controlling the descending height of the lifting frame 2 is provided below the column 1. A fourth limit switch SQ5 for anti-collision is provided on the column 1 above the first limit switch SQ2. An infrared photoelectric switch SQ1 is provided in the middle position of the lifting frame 2. A limit plate 4 is provided on the lifting frame 2. A control component 6 for controlling the movement of the elevator is provided in the electrical cabinet 5. The first limit switch SQ2, the third limit switch SQ4, and the fourth limit switch SQ5 are all electrically connected to the control component 6. Whenever the infrared photoelectric switch SQ1 detects the corrugated cardboard 7, the first AC contactor KM1 1 is energized and energized. Under the control of the first time relay KT1, the lifting frame 1 performs step-by-step ascent. When the lifting frame 2 rises to the limit plate 6 and presses SQ2 or SQ3, the second time relay KT2 is energized and delays the control of the second AC contactor KM22 to be energized and energized. The lifting frame 1 begins to descend until the limit plate 6 presses the third limit switch SQ4 and stops. During the repeated lifting process, when an arc is generated between the main contacts of the first AC contactor KM11 and burns out the engagement or limit protection of the first limit switch SQ2 and the second limit switch SQ3, the protection function becomes invalid and the lifting frame 2 cannot be driven to descend normally. As a result, the lifting frame 2 rises and hits the limit plate 6, pressing the fourth limit switch SQ5 or the fifth limit switch SQ6. The third AC contactor KM33 loses power and is disconnected, thereby cutting off the power supply circuit and the control power supply circuit of the lifting motor 3, thereby preventing safety accidents.

[0018] Specifically, a second limit switch SQ3 is provided above the first limit switch SQ2, and a fifth limit switch SQ6 is provided above the fourth limit switch SQ5. The second limit switch SQ3 and the first limit switch SQ2 are connected to the control component 6, and the fourth limit switch SQ5 and the fifth limit switch SQ6 are connected to the control component 6. By setting the second limit switch SQ3 and the fifth limit switch SQ6, double protection is achieved and safety performance is improved.

[0019] Preferably, the control component 6 includes a first AC contactor KM11, a second AC contactor KM22, a third AC contactor KM33, a first time relay KT1, and a second time relay KT2. Under the control of the first time relay KT1, the lifting frame 1 performs step-by-step ascent. When the lifting frame 2 rises to the limit plate 6 and presses SQ2 or SQ3, the second time relay KT2 is energized and delays the control of the second AC contactor KM22 to be energized and attracted. The lifting frame 1 begins to descend until the limit plate 6 presses the third limit switch SQ4 and stops, thereby realizing the safe lifting of the corrugated cardboard 7 by the elevator.

[0020] Furthermore, the fourth limit switch SQ5, the fifth limit switch SQ6 and the third AC contactor KM33 are connected in series between the two power supply ends of the control circuit. When an arc is generated between the main contacts of the first AC contactor KM11 and the engagement or limit protection SQ2 and SQ3 are burned out, the protection functions fail, the limit plate 6 presses SQ5 or SQ6, and the third AC contactor KM33 loses power and is disconnected, thereby cutting off the power supply circuit and the control power supply circuit of the lifting motor 3, thereby preventing safety accidents from occurring.

[0021] Furthermore, a thermal relay KR is provided in the electrical cabinet 5 , and the thermal relay KR is connected to the motor 3 . The thermal relay KR plays a role of overload protection to prevent the motor 3 from burning out.

[0022] Furthermore, the limit plate 4 includes an upper plate and a lower plate, which are respectively arranged on the upper and lower sides of the lifting frame 2, so that the limit plate 4 can accurately press the limit switches on the upper and lower sides.

[0023] When the electrical safety protection control device for the stacking elevator of a corrugated cardboard line of this embodiment is in use, whenever the infrared photoelectric switch SQ1 detects the corrugated cardboard 7, the first AC contactor KM11 is energized and attracted, and the lifting frame 1 is controlled by the first time relay KT1 to perform step-by-step ascent. When the lifting frame 2 rises to the limit plate 6 and presses SQ2 or SQ3, the second time relay KT2 is energized and delays the control to energize the second AC contactor KM22, and the lifting frame 1 begins to descend to the limit plate 6 and presses the third limit switch SQ2 or SQ3. Q4 stops. During the repeated lifting process, an arc occurs between the main contacts of the first AC contactor KM11, burning out the engagement or limit protection of the first limit switch SQ2 and the second limit switch SQ3, rendering the protection function ineffective. The lifting frame 2 cannot be driven down normally, causing the lifting frame 2 to rise and hit the limit plate 6, pressing the fourth limit switch SQ5 or the fifth limit switch SQ6. The third AC contactor KM33 loses power and disconnects, thereby cutting off the power supply circuit and the control power supply circuit of the lifting motor 3, thereby preventing safety accidents. The electrical safety protection control device for a corrugated cardboard stacking elevator of the present utility model can quickly cut off the power supply circuit in the event of abnormal elevator ascent, effectively improving safety, and has the characteristics of wide application range and strong practicality.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An electrical safety protection control device for a corrugated cardboard line stacking elevator, characterized in that: The utility model comprises a column (1) and an electrical cabinet (5), wherein a lifting frame (2) for lifting and stacking is provided on the column (1), a first limit switch (SQ2) for controlling the rising height of the lifting frame (2) is provided on the column (1), a third limit switch (SQ4) for controlling the descending height of the lifting frame (2) is provided below the column (1), a fourth limit switch (SQ5) for anti-collision is provided on the column (1) above the first limit switch (SQ2), an infrared photoelectric switch (SQ1) is provided at the middle position of the lifting frame (2), a limit plate (4) is provided on the lifting frame (2), a control component (6) for controlling the movement of the lift is provided in the electrical cabinet (5), and the first limit switch (SQ2), the third limit switch (SQ4), and the fourth limit switch (SQ5) are all electrically connected to the control component (6).

2. The electrical safety protection control device for a corrugated cardboard line stacking elevator according to claim 1 is characterized in that: A second limit switch (SQ3) is provided above the first limit switch (SQ2), a fifth limit switch (SQ6) is provided above the fourth limit switch (SQ5), the second limit switch (SQ3) and the first limit switch (SQ2) are connected to the control component (6), and the fourth limit switch (SQ5) and the fifth limit switch (SQ6) are connected to the control component (6).

3. The electrical safety protection control device for a corrugated cardboard line stacking elevator according to claim 2, characterized in that: The control component (6) includes a first AC contactor (KM11), a second AC contactor (KM22), a third AC contactor (KM33), a first time relay (KT1), and a second time relay (KT2).

4. The electrical safety protection control device for a corrugated cardboard line stacking elevator according to claim 3 is characterized in that: The fourth limit switch (SQ5), the fifth limit switch (SQ6) and the third AC contactor (KM33) are connected in series between the two power supply terminals of the control circuit.

5. The electrical safety protection control device for a corrugated cardboard line stacking elevator according to claim 1, characterized in that: A thermal relay (KR) is provided in the electrical cabinet (5), and the thermal relay (KR) is connected to the motor (3).

6. The electrical safety protection control device for a corrugated cardboard line stacking elevator according to claim 1, characterized in that: The limiting plate (4) comprises an upper plate and a lower plate, and the upper plate and the lower plate are respectively arranged on the upper and lower sides of the lifting frame (2).

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