Lifting equipment control system and lifting equipment

Abstract

The utility model relates to the technical field of lifting equipment, in particular to a lifting equipment control system and lifting equipment, which comprises a motor, a motor band-type brake arranged on the motor, a release device connected with the motor band-type brake, a motor driver connected with the motor, a switch circuit and an energy consumption circuit, the motor band-type brake is used for locking a rotating shaft of the motor when external power supply is cut off, the releasing device is used for opening the motor band-type brake, the motor driver is used for driving the motor to operate, and the switching circuit is connected between the energy consumption circuit and a winding of the motor and used for switching off the rotating shaft of the motor when the lifting equipment is in a power-off state. According to the utility model, the energy-consuming circuit can be used for consuming the work done by the falling of the lifting equipment when the external power supply is cut off, so that the falling speed of the lifting equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a lifting equipment control system and a lifting equipment. Background Art

[0002] Lifting equipment is a platform or semi-enclosed platform type mechanical equipment or device that can carry people or goods up and down vertical passages. It has been widely used in the fields of construction, mine shafts, wind turbine towers, etc. As a mechatronic device, lifting equipment can be controlled by motors. In the prior art, if a mechanical or electrical failure suddenly occurs in the lifting equipment at high altitude, it will be trapped in the air and unable to rise or descend normally. In this way, maintenance personnel have to troubleshoot and repair the lifting equipment at high altitude, which is inconvenient to operate and will cause greater safety hazards. Utility Model Content

[0003] The utility model provides a lifting equipment control system and a lifting equipment, so as to solve the technical problem in the prior art that when the lifting equipment fails and is in a power-off state, the lifting equipment can be slowly lowered to a lower position to facilitate maintenance personnel to repair and avoid the safety hazards caused by high-altitude maintenance, which can facilitate maintenance personnel to carry out maintenance work.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is implemented in the following ways:

[0005] On the one hand, the utility model provides a lifting equipment control system, characterized in that it includes a motor, a motor brake arranged on the motor, a release device connected to the motor brake, a motor driver connected to the motor, a switch circuit and an energy consumption circuit, the motor brake is used to lock the rotating shaft of the motor when the external power supply is cut off, the release device is used to open the motor brake, the motor driver is used to drive the motor to operate, the switch circuit is connected between the energy consumption circuit and the winding of the motor, and the switch circuit is used to connect the winding of the motor to the energy consumption circuit when the lifting equipment is in a power-off state, so as to consume the work done by the lifting equipment when the external power supply is cut off, so as to reduce the falling speed of the lifting equipment.

[0006] Furthermore, the switch circuit includes a first AC contactor, which includes a normally closed contact. The normally closed contact on the first AC contactor is closed when the lifting device is powered off, and the winding of the motor and the energy consumption circuit are turned on in the closed state.

[0007] Furthermore, the first AC contactor also includes a normally open contact, and the normally open contact on the first AC contactor is connected between the driving end of the motor driver and the winding of the motor. When the normally open contact of the first AC contactor is closed, the motor driver and the winding of the motor are turned on.

[0008] Furthermore, the switching circuit also includes a second AC contactor, which includes a normally open contact. The normally open contact of the second AC contactor is connected between the driving end of the motor driver and the winding of the motor. When closed, the normally open contact of the second AC contactor connects the motor driver and the winding of the motor.

[0009] Furthermore, there are two normally open contacts on the first AC contactor, and any two ports in the driving end of the motor driver are respectively connected to any two phase terminals of the three-phase terminal of the motor winding through the two normally open contacts on the first AC contactor, and the remaining port in the driving end of the motor driver is directly connected to the remaining phase terminal of the three-phase terminal of the motor winding.

[0010] Furthermore, the energy consumption circuit is specifically a triangle-connected resistance circuit, which includes three triangle-connected first resistors, a second resistor and a third resistor. There are specifically two normally closed contacts on the first AC contactor. Any two of the three corner contacts of the triangle-connected resistance circuit are respectively connected to any two of the three-phase terminals of the motor winding through the two normally closed contacts on the first AC contactor, and the remaining one of the three corner contacts of the triangle-connected resistance circuit is directly connected to the remaining phase terminal of the three-phase terminals of the motor winding.

[0011] Furthermore, there are two normally open contacts on the second AC contactor, and any two ports in the driving end of the motor driver are respectively connected to any two phase terminals of the three-phase terminals of the motor winding through the two normally open contacts on the second AC contactor, and the remaining port in the driving end of the motor driver is directly connected to the remaining phase terminal of the three-phase terminals of the motor winding.

[0012] Another aspect of the present invention provides a lifting device, comprising a lifting device control system as described in any one of the above items.

[0013] Furthermore, the lifting equipment is specifically a tower climbing machine, and the tower climbing machine is provided with the lifting equipment control system described in any one of the above items.

[0014] Beneficial effects of the utility model:

[0015] In the utility model, by adopting an energy-consuming circuit and a switch circuit, when the external power supply is cut off, the switch circuit conducts the winding of the motor with the energy-consuming circuit, and the work done by the lifting device when the external power supply is cut off is consumed by the heat generated by the energy-consuming circuit, thereby reducing the falling speed of the lifting device, allowing the lifting device to fall slowly and ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a lifting equipment control system in one embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of a lifting equipment control system in another embodiment of the utility model;

[0018] Figure 3 It is a structural schematic diagram of a lifting equipment control system in another embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1. Motor; 2. Motor brake; 3. Release device; 4. Energy consumption circuit; 5. Switching circuit; 6. Motor driver. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] Reference Figure 1 , an embodiment of the present application provides a lifting equipment control system, including a motor 1, a motor brake 2 arranged on the motor 1, a release device 3 connected to the motor brake 2, a motor driver 6 connected to the motor 1, an energy consumption circuit 4 and a switch circuit 5, the motor brake 2 is used to lock the rotating shaft of the motor 1 when the external power supply is cut off, the release device 3 is used to open the motor brake 2, the motor driver 6 is used to drive the motor 1 to operate, the switch circuit 5 is connected between the energy consumption circuit 4 and the winding of the motor 1, and the switch circuit 5 is used to connect the winding of the motor 1 to the energy consumption circuit 4 when the lifting equipment is in a power-off state, consume the work done by the lifting equipment when the external power supply is cut off, so as to reduce the falling speed of the lifting equipment.

[0023] In this embodiment, the working process of the utility model is as follows: when the system operates normally, the motor driver 6 drives the motor 1 to operate normally, and the energy consumption circuit 4 is disconnected from the winding of the motor 1 through the switch circuit 5, which does not affect the normal operation of the motor 1. When the lifting equipment suddenly fails, the external power supply is cut off, and the motor 1 is locked by the motor brake 2. After the motor brake 2 is opened by the release device 3, the lifting equipment descends by its own weight, driving the motor 1 to reverse. At this time, the energy consumption circuit 4 is connected to the winding of the motor 1 through the switch circuit 5, consuming the work done by the lifting equipment to fall, so as to reduce the falling speed of the lifting equipment.

[0024] The motor brake 2 may be an electromagnetic mechanical brake, which can lock the shaft of the motor 1 when the power supply is cut off, thus completing the brake function.

[0025] The release device 3 may be a manual release device, which can open the motor brake 2 under the action of an external force. For example, the manual release device may be a mechanical handle plugged into the motor brake 2, and when an external force acts on the mechanical handle, the motor brake 2 may be opened by torque; the manual release device may also be a mechanical transmission mechanism connected to the motor brake 2, which may lock the shaft of the motor 1 when cut off, thereby completing the brake function.

[0026] Based on a pull-rope mechanical transmission mechanism, the motor holding brake 2 can be opened by manually operating the mechanical transmission mechanism.

[0027] The switch circuit 5 includes a first AC contactor KM1, which includes a normally closed contact. The normally closed contact on the first AC contactor KM1 is closed when the lifting device is powered off, and the winding of the motor 1 and the energy consumption circuit 4 are turned on in the closed state.

[0028] Second embodiment:

[0029] See also Figure 2 The second embodiment is based on the first embodiment, and a normally open contact is added to the first AC contactor KM1. The normally open contact on the first AC contactor KM1 is connected between the driving end of the motor driver 6 and the winding of the motor 1. When the normally open contact of the first AC contactor KM1 is closed, the motor driver 6 and the winding of the motor 1 are connected.

[0030] By arranging a normally open contact between the motor driver 6 and the winding of the motor 1, since both the normally open contact and the normally closed contact are contacts on the first AC contactor, it can be realized by an AC contactor, which is convenient for wiring and cost saving. In addition, the state between the normally open contact and the normally closed contact on the first AC contactor is opposite, if the normally open contact is turned on, the normally closed contact is disconnected, otherwise, if the normally open contact is disconnected, the normally closed contact is turned on. By such a design, it can be ensured that only one of the motor driver 6 and the energy consumption circuit 4 is in a working (i.e., turned on) state, and the state of the two contacts (normally open contact and normally closed contact) on the first AC contactor KM1 can be controlled by the logic we want.

[0031] Furthermore, the energy consumption circuit 4 in this embodiment is specifically a triangle-connected resistor circuit, which includes three triangle-connected first resistors, a second resistor and a third resistor.

[0032] Further, when the energy consumption circuit 4 is specifically a triangle-connected resistance circuit, there are specifically two normally closed contacts on the first AC contactor, and any two of the three corner contacts of the triangle-connected resistance circuit are respectively connected to any two of the three-phase terminals of the motor winding through the two normally closed contacts on the first AC contactor, and the remaining one of the three corner contacts of the triangle-connected resistance circuit is directly connected to the remaining phase terminal of the three-phase terminals of the motor winding.

[0033] Third embodiment:

[0034] See also Figure 3 The third embodiment adds a second AC contactor KM2 on the basis of the first embodiment. The first AC contactor KM1 and the second AC contactor KM2 together constitute a switch circuit 5. The second AC contactor KM2 includes a normally open contact. The normally open contact of the second AC contactor KM2 is connected between the driving end of the motor driver 6 and the winding of the motor 1. When the normally open contact of the second AC contactor KM2 is closed, the motor driver 6 and the winding of the motor 1 are turned on.

[0035] Furthermore, there are two normally open contacts on the second AC contactor, and any two ports in the driving end of the motor driver 6 are respectively connected to any two phase terminals of the three-phase terminal of the motor 1 winding through the two normally open contacts on the second AC contactor, and the remaining port in the driving end of the motor driver 6 is directly connected to the remaining phase terminal of the three-phase terminal of the motor 1 winding.

[0036] By arranging the first AC contactor between the energy consumption circuit 4 and the winding of the motor 1, and arranging the second AC contactor between the driving end of the motor driver 6 and the winding of the motor 1, the corresponding circuits can be controlled separately. In addition, the states between the normally closed contact on the first AC contactor and the normally open contact on the second AC contactor are opposite. If the normally closed contact on the first AC contactor is turned on, the normally open contact on the second AC contactor is disconnected. On the contrary, if the normally closed contact on the first AC contactor is disconnected, the normally open contact on the second AC contactor is turned on. Through such a design, it can be ensured that only one of the motor driver 6 and the energy consumption circuit 4 is in the working (i.e., turned on) state, and the states of the two contacts (normally open contact and normally closed contact) on the first AC contactor KM1 and the second AC contactor KM2 can be controlled by the logic we want.

[0037] A lifting device comprises the lifting device control system described in any one of the above embodiments.

[0038] Furthermore, the above-mentioned lifting equipment is specifically a tower climbing machine, and the tower climbing machine is provided with the lifting equipment control system described in any of the above-mentioned embodiments.

[0039] For the specific limitations on lifting equipment, please refer to the limitations on a lifting equipment control system mentioned above, which will not be repeated here.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. In addition, the technical solutions between the various implementations of the utility model can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A lifting equipment control system, characterized in that: The invention comprises a motor (1), a motor brake (2) arranged on the motor (1), a release device (3) connected to the motor brake (2), a motor driver (6) connected to the motor (1), a switch circuit (5) and an energy consumption circuit (4), wherein the motor brake (2) is used to lock the rotating shaft of the motor (1) when the external power supply is cut off, the release device (3) is used to open the motor brake (2), the motor driver (6) is used to drive the motor (1) to operate, the switch circuit (5) is connected between the energy consumption circuit (4) and the winding of the motor (1), and the switch circuit (5) is used to connect the winding of the motor (1) to the energy consumption circuit (4) when the lifting device is in a power-off state, so as to consume the work done by the lifting device when the external power supply is cut off, so as to reduce the falling speed of the lifting device; The switch circuit (5) comprises a first AC contactor, the first AC contactor comprises a normally closed contact, the normally closed contact on the first AC contactor is closed when the lifting device is powered off, and in the closed state, the winding of the motor (1) and the energy consumption circuit (4) are turned on; The energy consumption circuit (4) is specifically a triangle-connected resistor circuit, the triangle-connected resistor circuit includes three triangle-connected first resistors, a second resistor and a third resistor, the first AC contactor has two normally closed contacts, any two of the three corner contacts of the triangle-connected resistor circuit are respectively connected to any two of the three-phase terminals of the motor winding through the two normally closed contacts on the first AC contactor, and the remaining one of the three corner contacts of the triangle-connected resistor circuit is directly connected to the remaining phase terminal of the three-phase terminals of the motor winding.

2. The lifting equipment control system according to claim 1, characterized in that: The first AC contactor also includes a normally open contact, the normally open contact on the first AC contactor is connected between the drive end of the motor driver (6) and the winding of the motor (1), and the normally open contact of the first AC contactor conducts the motor driver (6) and the winding of the motor (1) when closed.

3. The lifting equipment control system according to claim 1, characterized in that: The switch circuit (5) further comprises a second AC contactor, the second AC contactor comprising a normally open contact, the normally open contact of the second AC contactor being connected between the drive end of the motor driver (6) and the winding of the motor (1), and the normally open contact of the second AC contactor conducting the motor driver (6) and the winding of the motor (1) when closed.

4. The lifting equipment control system according to claim 2, characterized in that: There are specifically two normally open contacts on the first AC contactor, and any two ports in the driving end of the motor driver (6) are respectively connected to any two phase terminals of the three-phase terminal of the winding of the motor (1) through the two normally open contacts on the first AC contactor, and the remaining one port in the driving end of the motor driver (6) is directly connected to the remaining phase terminal of the three-phase terminal of the winding of the motor (1).

5. The lifting equipment control system according to claim 3, characterized in that: There are specifically two normally open contacts on the second AC contactor, and any two ports in the driving end of the motor driver (6) are respectively connected to any two phase terminals of the three-phase terminal of the motor winding through the two normally open contacts on the second AC contactor, and the remaining one port in the driving end of the motor driver (6) is directly connected to the remaining phase terminal of the three-phase terminal of the motor winding.

6. A lifting device, characterized in that: It comprises the lifting equipment control system as described in any one of claims 1 to 5.

7. The lifting device according to claim 6, characterized in that: The lifting equipment is specifically a tower climbing machine, and the tower climbing machine is provided with the lifting equipment control system.

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