CN219860236U - Disk crown block rotation control system - Google Patents
Disk crown block rotation control system Download PDFInfo
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- CN219860236U CN219860236U CN202320809020.8U CN202320809020U CN219860236U CN 219860236 U CN219860236 U CN 219860236U CN 202320809020 U CN202320809020 U CN 202320809020U CN 219860236 U CN219860236 U CN 219860236U
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- intermediate relay
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- power supply
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- crown block
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- 102100038184 Keratin-like protein KRT222 Human genes 0.000 description 2
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Abstract
The utility model discloses a rotary control system of a disc crown block, and relates to an electric control system. The self-circulation power supply device comprises a frequency converter, a motor, a change-over switch, a self-circulation power supply unit, a first intermediate relay and a second intermediate relay; the output end of the self-circulation power supply unit is respectively connected with one end of a second contact and one end of a third contact of the change-over switch; the other end of the second contact is connected with a zero line through a normally closed contact of a second intermediate relay and a coil of a first intermediate relay which are connected in series; the other end of the third contact is connected with a zero line through a normally closed contact of a first intermediate relay and a coil of a second intermediate relay which are connected in series; the normally open contact of the first intermediate relay is connected to the first motor control end of the frequency converter, and the normally open contact of the second intermediate relay is connected to the second motor control end of the frequency converter. According to the utility model, through optimizing the crown block operation panel, the surface switch is reduced, so that the misoperation rate is reduced, the misoperation phenomenon is avoided, and the reliability of the system is improved.
Description
Technical Field
The utility model relates to an electric control system, in particular to a disk crown block rotation control system.
Background
The existing disc crown block rotary system is connected with a motor of the disc crown block rotary system through an alternating current contactor, and a crown block driver realizes forward and reverse rotation control of the motor through an operation button. Because the overhead traveling crane driver can only visually observe the lifting height of the goods in the operation process, accurate parking control cannot be realized. This situation often requires frequent operation of the buttons to drive the vehicle. However, the motor is reversed and braked in a frequent full-power state, so that the impact current is very large, the temperature in the motor is accumulated in a short time and forms high temperature, the motor is operated in a high-temperature state for a long time, the motor is easy to burn out, the equipment fault is frequent, and the normal operation of the equipment is seriously affected. And the rotary mechanism can also rotate along with inertia after the motor burns out, thereby easily causing safety accidents.
For this reason, the art has solved this problem by changing the ac contactor to a frequency converter to control the motor. The specific control mode is that a trigger button is arranged at the positive and negative rotation control end of the motor of the frequency converter, and when the corresponding button is pressed, the motor performs corresponding rotation action. In addition, the controller is adopted to control the on-off of the relay to trigger the motor forward and reverse rotation control end of the frequency converter.
But in that way, there is a risk of misoperation and the reliability is not high. The operation of the crown block mainly belongs to the work with high risk and high tension, and when the crown block driver operates, the crown block driver can have the condition of starting two buttons simultaneously due to tension misoperation, in particular to a practice driver. In addition, because of the influence of environmental factors, a mode of controller control is adopted, the communication line of the controller needs to have better anti-interference capability, otherwise, the control signal is interfered, and the problem of control lag and even failure is easy to occur.
Disclosure of Invention
The utility model aims to solve the technical problems of low risk and reliability of misoperation in a mode of triggering a motor through a frequency converter in the conventional disk crown block rotation system.
The utility model relates to a rotary control system of a disk crown block, which comprises a frequency converter and a motor; the self-circulation power supply system also comprises a change-over switch, a self-circulation power supply unit, a first intermediate relay and a second intermediate relay; the input end of the self-circulation power supply unit is connected with an external power supply, and the output end of the self-circulation power supply unit is respectively connected with one ends of a second contact and a third contact of the change-over switch; the other end of the second contact is connected with a zero line of an external power supply through a normally closed contact of a second intermediate relay and a coil of a first intermediate relay which are connected in series; the other end of the third contact is connected with a zero line of an external power supply through a normally closed contact of a first intermediate relay and a coil of a second intermediate relay which are connected in series; the normally open contact of the first intermediate relay is connected between the first motor control end and the common ground end of the frequency converter, and the normally open contact of the second intermediate relay is connected between the second motor control end and the common ground end of the frequency converter.
The self-circulation power supply unit comprises a third intermediate relay and a first contact of a change-over switch; one end of the first contact is connected with a normally open contact of the third intermediate relay in parallel and is connected with a live wire of an external power supply, and the other end of the first contact is connected with a zero line of the external power supply through a coil of the third intermediate relay; the coil connecting end of the first contact and the coil connecting end of the third intermediate relay are connected with a normally open contact of the third intermediate relay through a wire; and a normally open contact of the third intermediate relay is used as an output end of the self-circulation power supply unit.
And a first protector is arranged on a connecting line between the first contact and the coil of the third intermediate relay.
And the coils of the first intermediate relay and the coils of the second intermediate relay are connected with the zero line through second fuses.
And the live wire and the zero wire of the external power supply are respectively provided with an air switch.
Advantageous effects
The utility model has the advantages that:
1. through the normal close electric shock of second intermediate relay and third intermediate relay and the interactive design of coil for when working on any one intermediate relay, the return circuit that another intermediate relay was located must be in the off-state, thereby avoided the phenomenon of maloperation, improved the reliability of system.
2. Through the setting of change over switch and third intermediate relay, can optimize the operating panel of crown block, reduce the switch on its surface, and then reduce the maloperation rate.
Drawings
FIG. 1 is a schematic diagram of a part of an electrical structure of a disk crown block rotation control system according to the present utility model;
FIG. 2 is a schematic view of another part of the electrical structure of the rotary control system of the disc crown block of the present utility model.
Detailed Description
The utility model is further described below in connection with the examples, which are not to be construed as limiting the utility model in any way, but rather as falling within the scope of the claims.
Referring to fig. 1-2, the disk crown block rotation control system comprises a frequency converter U1, a motor M1, a change-over switch, a third intermediate relay, a first intermediate relay and a second intermediate relay. Wherein, the frequency converter U1 adopts a CHY190-1000G-6 type frequency converter. The change-over switch adopts a switch with three contacts, and can avoid misoperation of simultaneously pressing a plurality of switches because the change-over switch can only rotate to one gear at a time.
An air switch K1 is arranged on the live wire and the zero wire of the external power supply and is used as a main control switch. One end of the first contact K21 of the transfer switch is connected in parallel with a normally open contact KA31 of the third intermediate relay and is connected with a live wire of an external power supply. The other end of the first contact K21 is connected with a zero line of an external power supply through a coil KA30 of the third intermediate relay, and a first protector F1 is arranged on a connecting line between the first contact K21 and the coil KA30 of the third intermediate relay so as to perform short-circuit protection. The connection end of the first contact K21 and the coil KA30 of the third intermediate relay is connected to the normally open contact KA31 of the third intermediate relay by a wire. The normally open contact KA31 of the third intermediate relay is connected to one end of the second contact K22 and one end of the third contact K23 of the change-over switch, respectively.
When the gear of the change-over switch is in the conduction state of the first contact K21, the coil KA30 of the third intermediate relay is electrified to work, so that the normally open electric shock of the third intermediate relay is closed, and the power can be supplied to a loop where the first intermediate relay and the second intermediate relay are located. When the gear of the change-over switch is not located at the position of the first contact K21, namely the first contact K21 is disconnected, the third intermediate relay can realize power supply through the normally open contact of the third intermediate relay due to the effect of the lead, and a self-circulation power supply loop is formed. Through the arrangement, the operation panel of the crown block can be optimized, the switch on the surface of the crown block is reduced, and the misoperation rate is further reduced.
The other end of the second contact K22 is connected with a zero line of an external power supply through a normally closed contact KA22 of a second intermediate relay and a coil KA10 of a first intermediate relay which are connected in series. The other end of the third contact K23 is connected with a zero line of an external power supply through a normally closed contact KA12 of the first intermediate relay and a coil KA20 of the second intermediate relay which are connected in series. And the second fuse F2 is arranged on the connecting lines of the coil KA10 of the first intermediate relay and the connecting lines of the coil KA20 of the second intermediate relay and the zero line so as to perform short-circuit protection. The normally open contact KA11 of the first intermediate relay is connected between the first motor control end of the frequency converter U1 and the common ground, and the normally open contact KA21 of the second intermediate relay is connected between the second motor control end of the frequency converter U1 and the common ground. Through the normally closed electric shock of the second intermediate relay and the third intermediate relay and the interactive design of the coils, the loop where the other intermediate relay is located is necessarily in a disconnected state when any intermediate relay works, so that the phenomenon of misoperation is avoided, and the reliability of the system is improved.
The working principle of the utility model is as follows: when the air switch K1 is opened and the change-over switch is in an initial state, the first contact K21 of the change-over switch is in a tool bit, so that the coil KA30 of the third intermediate relay works electrically, and the normally open electric shock of the third intermediate relay is closed. When the change-over switch rotates and the rotated position enables the second contact K22 to be conducted, the third intermediate relay can realize power supply through the normally open contact of the third intermediate relay due to the effect of the lead, and a self-circulation power supply loop is formed. In addition, the conduction of the second contact K22 enables the coil KA10 of the first intermediate relay to be electrified, the normally closed contact KA12 of the first intermediate relay is disconnected, and the loop where the second intermediate relay is located is always in a disconnected state; and the normally open contact KA11 of the first intermediate relay is closed. The first motor control terminal of the frequency converter U1 is conducted with the common ground terminal thereof, so as to trigger the motor M1 to rotate in a set direction.
When the change-over switch rotates and the third contact K23 is turned on after the change-over switch rotates, the coil KA20 of the second intermediate relay is electrified, the normally closed contact KA22 of the second intermediate relay is disconnected, and the loop where the first intermediate relay is positioned is always in a disconnected state; and the normally open contact KA21 of the second intermediate relay is closed. The second motor control terminal of the inverter U1 is conducted to its common ground, thereby triggering the motor M1 to rotate in the opposite direction.
While only the preferred embodiments of the present utility model have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these do not affect the effect of the implementation of the present utility model and the utility of the patent.
Claims (5)
1. A disk crown block rotation control system comprises a frequency converter (U1) and a motor (M1); the power supply system is characterized by further comprising a change-over switch, a self-circulation power supply unit, a first intermediate relay and a second intermediate relay; the input end of the self-circulation power supply unit is connected with an external power supply, and the output end of the self-circulation power supply unit is respectively connected with one end of a second contact (K22) and one end of a third contact (K23) of the change-over switch; the other end of the second contact (K22) is connected with a zero line of an external power supply through a normally closed contact (KA 22) of a second intermediate relay and a coil (KA 10) of a first intermediate relay which are connected in series; the other end of the third contact (K23) is connected with a zero line of an external power supply through a normally closed contact (KA 12) of a first intermediate relay and a coil (KA 20) of a second intermediate relay which are connected in series; the normally open contact (KA 11) of the first intermediate relay is connected between the first motor control end of the frequency converter (U1) and the common ground, and the normally open contact (KA 21) of the second intermediate relay is connected between the second motor control end of the frequency converter (U1) and the common ground.
2. The disc crown block revolution control system according to claim 1, wherein the self-circulation power supply unit comprises a third intermediate relay and a first contact (K21) of a transfer switch; one end of the first contact (K21) is connected with a normally open contact (KA 31) of the third intermediate relay in parallel and is connected with a live wire of an external power supply; the other end of the first contact (K21) is connected with a zero line of an external power supply through a coil (KA 30) of a third intermediate relay; the connection end of the first contact (K21) and the coil (KA 30) of the third intermediate relay is connected with a normally open contact (KA 31) of the third intermediate relay through a wire; the normally open contact (KA 31) of the third intermediate relay serves as the output end of the self-circulation power supply unit.
3. The disc crown block revolution control system according to claim 2, wherein a first fuse (F1) is provided on a connection line between the first contact (K21) and the coil (KA 30) of the third intermediate relay.
4. The disc crown block rotation control system according to claim 1, wherein the connection lines of the coil (KA 10) of the first intermediate relay and the coil (KA 20) of the second intermediate relay with the zero line are each provided with a second fuse (F2).
5. The disc crown block revolution control system according to claim 1, wherein an air switch (K1) is installed on both the live and neutral wires of the external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320809020.8U CN219860236U (en) | 2023-04-12 | 2023-04-12 | Disk crown block rotation control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320809020.8U CN219860236U (en) | 2023-04-12 | 2023-04-12 | Disk crown block rotation control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219860236U true CN219860236U (en) | 2023-10-20 |
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ID=88348336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320809020.8U Active CN219860236U (en) | 2023-04-12 | 2023-04-12 | Disk crown block rotation control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219860236U (en) |
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2023
- 2023-04-12 CN CN202320809020.8U patent/CN219860236U/en active Active
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