Electric chain block linkage device

Abstract

The utility model relates to an electric chain block linkage device which can reduce safety risks and improve working efficiency, the electric chain block linkage device comprises a first electric chain block, a second electric chain block and a linkage control box, and the first electric chain block and the second electric chain block are both electrically connected with the linkage control box; the movable end of the first electric chain block is connected with a first preset position of a generator rotor rear support, and the movable end of the second electric chain block is connected with a second preset position of the generator rotor rear support. The first preset position and the second preset position are located on the two sides of a rear support of the generator rotor respectively and used for pulling the generator rotor out of a stator chamber or penetrating the generator rotor into the stator chamber. And the linkage control box is arranged at a preset position in the plant.

Description

Technical Field

[0001] The present disclosure relates to the field of electrical control technology, and in particular to an electric fall chain linkage device. Background Art

[0002] The rotor of a generator is a key component in generating a magnetic field. After prolonged high-speed, loaded operation, the rotor and its associated components may deteriorate due to various factors, including mechanical wear and aging of electrical insulation. To ensure the safe operation of the generator set, the rotor and its associated components must be regularly inspected and repaired. This process requires the rotor to be removed from the stator chamber, inspected, and then inserted into the stator chamber to ensure smooth maintenance of the generator body.

[0003] In the relevant technology, when extracting the generator rotor, two cranes need to be used simultaneously in conjunction with the reversing pulley. Because the crane hook is lifted unstably, it will produce instantaneous impact force on the wire rope, which may cause the wire rope to break or the generator rotor to suddenly move axially. In addition, when using two electric fall chains separately to insert the generator rotor, due to the inconsistent manual start and stop actions of the two fall chains, it is easy to cause the generator rotor to deviate and swing during the insertion process, causing damage, leading to safety accidents. Utility Model Content

[0004] The purpose of the present disclosure is to provide an electric fall chain linkage device to solve the problems in the related art.

[0005] In order to achieve the above-mentioned object, the present disclosure provides an electric fall chain linkage device, the electric fall chain linkage device comprising a first electric fall chain, a second electric fall chain and a linkage control box, the first electric fall chain and the second electric fall chain are both electrically connected to the linkage control box;

[0006] The movable end of the first electric fall chain is connected to a first preset position of the generator rotor rear bracket, and the movable end of the second electric fall chain is connected to a second preset position of the generator rotor rear bracket, the first preset position and the second preset position are respectively located on both sides of the generator rotor rear bracket, and are used to withdraw the generator rotor from the stator bore or insert the generator rotor into the stator bore;

[0007] The linkage control box is arranged at a preset position in the factory building.

[0008] Optionally, the first electric fall chain includes a first motor, the second electric fall chain includes a second motor, and the linkage control box includes a first air switch, a first contactor, and a second contactor;

[0009] The inlet terminal of the first air switch is connected to a three-phase power supply, and the outlet terminal of the first air switch is connected to the main contact inlet terminal of the first contactor and the main contact inlet terminal of the second contactor respectively;

[0010] The main contact output terminals of the first contactor are respectively connected to the three-phase winding of the first motor and the three-phase winding of the second motor according to a first preset phase sequence, and the main contact output terminals of the second contactor are respectively connected to the three-phase winding of the first motor and the three-phase winding of the second motor according to a second preset phase sequence.

[0011] Optionally, the linkage control box includes a second air switch and a third air switch;

[0012] The main contact outlet of the first contactor and the main contact outlet of the second contactor are both connected to the three-phase winding of the first motor through a second air switch, and the main contact outlet of the first contactor and the main contact outlet of the second contactor are both connected to the three-phase winding of the second motor through a third air switch. Optionally, the linkage control box includes a first control button and a second control button;

[0013] The normally open contact of the first control button, the normally closed contact of the second control button, the coil of the first contactor and the normally closed contact of the second contactor are sequentially connected in series to form a first control circuit;

[0014] The normally open contact of the second control button, the normally closed contact of the first control button, the coil of the second contactor and the normally closed contact of the first contactor are sequentially connected in series to form a second control circuit.

[0015] Optionally, the linkage control box includes a first indicator light and a second indicator light;

[0016] The normally open contact of the first contactor and the first indicator light are connected in series to form a first indicator light circuit;

[0017] The normally open contact of the second contactor and the second indicator light are connected in series to form a second indicator light circuit.

[0018] Optionally, the first control circuit, the second control circuit, the first indicator light circuit, and the second indicator light circuit are all connected in parallel.

[0019] Optionally, the linkage control box includes a fuse;

[0020] The three-phase power supply is connected to the incoming line terminal of the first air switch through the fuse.

[0021] Optionally, the linkage control box includes a first thermal relay and a second thermal relay;

[0022] The output terminal of the second air switch is connected to the three-phase winding of the first motor through the first thermal relay, and the output terminal of the third air switch is connected to the three-phase winding of the second motor through the second thermal relay.

[0023] Optionally, the fixed end of the first electric fall chain and the fixed end of the second electric fall chain are both connected to a preset fixing component in the factory building, or are both connected to a preset lifting ring of the generator stator chamber.

[0024] Optionally, the electric fall chain is a ring chain type electric fall chain.

[0025] Through the above technical solution, the electric fall chain linkage device includes a first electric fall chain, a second electric fall chain and a linkage control box. The first electric fall chain and the second electric fall chain are both electrically connected to the linkage control box. The electric fall chain is driven by a motor to achieve smooth and uniform operation without generating sudden impact force. The linkage control box enables the two electric fall chains to achieve consistent movements, thereby reducing safety risks and improving work efficiency.

[0026] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0028] Figure 1 Schematic diagram of an electric fall chain linkage device according to an exemplary embodiment.

[0029] Figure 2 The figure is a wiring diagram of a linkage control box according to an exemplary embodiment.

[0030] Description of Reference Numerals

[0031] 110-First electric fall chain; 120-Second electric fall chain; 130-Linkage control box; 111-First motor; 121-Second motor; 131-First air switch; 132-First contactor; 133-Second contactor; 134-Second air switch; 135-Third air switch; 136-First indicator light; 137-Second indicator light; 138-Fuse; 11-First control button normally open contact; 12-First control button normally closed contact; 21-Second control button normally open contact; 22-Second control button normally closed contact; 31-First contactor coil; 32-First contactor normally closed contact; 33-First contactor normally open contact; 41-Second contactor coil; 42-Second contactor normally closed contact; 43-Second contactor normally open contact DETAILED DESCRIPTION

[0032] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0033] As mentioned in the background technology, in the related technology, when pulling out the generator rotor, two cranes need to be used simultaneously in conjunction with the reversing pulley. Because the crane hook is lifted unstably, it will produce instantaneous impact force on the wire rope, which may cause the wire rope to break or the generator rotor to suddenly move axially. In addition, when using two electric fall chains separately to insert the generator rotor, due to the inconsistent manual start and stop actions of the two fall chains, it is easy to cause the generator rotor to deviate and swing during the insertion process, causing damage, leading to safety accidents.

[0034] In view of this, an embodiment of the present disclosure provides an electric fall chain linkage device, which can reduce safety risks and improve work efficiency.

[0035] Figure 1 is a schematic diagram of an electric chain-falling linkage device according to an exemplary embodiment, referring to Figure 1 The electric fall chain linkage device includes a first electric fall chain 110, a second electric fall chain 120 and a linkage control box 130, and the first electric fall chain 110 and the second electric fall chain 120 are both electrically connected to the linkage control box 130;

[0036] The movable end of the first electric fall chain 110 is connected to a first preset position of the generator rotor rear bracket, and the movable end of the second electric fall chain 120 is connected to a second preset position of the generator rotor rear bracket. The first preset position and the second preset position are respectively located on both sides of the generator rotor rear bracket, and are used to extract the generator rotor from or insert the stator bore;

[0037] The linkage control box 130 is arranged at a preset position in the factory.

[0038] It should be understood that a generator primarily consists of two parts: the rotor and the stator. The rotor is the rotating part of the generator, while the stator is the stationary part. The stator bore refers to the inner cavity of the stator core, which is where the rotor rotates. The rotor is mounted inside the stator bore, supported by bearings and able to rotate freely. A certain gap is left between the inner diameter of the stator bore and the outer diameter of the rotor to ensure smooth rotation of the rotor.

[0039] It should be understood that, during long-term operation, the rotor of a generator is subject to various mechanical and electromagnetic stresses. To ensure the performance and reliability of the generator, the rotor needs to be regularly inspected and maintained. This inspection may include checking the insulation status, cleaning and lubricating the rotor core and windings, etc. Furthermore, during rotor inspection, the rotor must first be removed from the stator chamber and then installed back into the stator chamber after the inspection is complete. Specifically, in actual operation, a crane or lifting mechanism can be used to control vertical movement to lift the entire rotor assembly. The rotor can then be smoothly removed and installed by using a vertically lifting crane and two horizontally pulling electric fall chains.

[0040] It should also be understood that when pulling out or inserting the rotor, by connecting the movable end of the electric fall chain to the rear bracket of the rotor so that the driving force acts on the rear bracket of the rotor, the shaking and vibration of the rotor during the extraction process can be reduced, and the risk of damage to the rotor and bearings can be reduced. In addition, the two electric fall chains can maintain consistent movements through the linkage control box, thereby ensuring that the rotor maintains a stable posture throughout the process, avoiding safety hazards such as deflection and collision, improving operational safety, and reducing the risk of human injury.

[0041] For example, the linkage control box 130 can be set in a working area close to the operator according to actual conditions, so that the operator can monitor and adjust it at any time. This embodiment of the present disclosure is not limited to this.

[0042] In the above manner, the electric fall chain linkage device includes a first electric fall chain 110, a second electric fall chain 120 and a linkage control box 130. The first electric fall chain 110 and the second electric fall chain 120 are both electrically connected to the linkage control box 130. The electric fall chain is driven by a motor to achieve smooth and uniform operation without generating sudden impact force. The linkage control box 130 enables the two electric fall chains to achieve the effect of consistent movement, thereby reducing safety risks and improving work efficiency.

[0043] Figure 2 This is a wiring diagram of a linkage control box according to an exemplary embodiment. Figure 2 The first electric fall chain 110 includes a first motor 111, the second electric fall chain 120 includes a second motor 121, and the linkage control box 130 includes a first air switch 131, a first contactor 132 and a second contactor 133;

[0044] The inlet terminal of the first air switch 131 is connected to the three-phase power supply, and the outlet terminal of the first air switch 131 is connected to the main contact inlet terminal of the first contactor 132 and the main contact inlet terminal of the second contactor 133 respectively;

[0045] The main contact output terminals of the first contactor 132 are respectively connected to the three-phase winding of the first motor 111 and the three-phase winding of the second motor 121 according to a first preset phase sequence, and the main contact output terminals of the second contactor 133 are respectively connected to the three-phase winding of the first motor 111 and the three-phase winding of the second motor 121 according to a second preset phase sequence.

[0046] It should be understood that the first air switch 131 can control the power supply of the entire circuit, and through its outlet terminal, it is connected to the main contact inlet terminal of the first contactor 132 and the main contact inlet terminal of the second contactor 133, respectively, so as to supply power to the first contactor 132 and the second contactor 133. By connecting the contactor to the motor winding according to different preset phase sequences, the forward and reverse rotation control of the motor can be realized, thereby realizing the upward and downward movement of the electric fall chain. Moreover, when the first contactor 132 is energized, the first motor 111 and the second motor 121 can be driven to operate synchronously. When the second contactor 133 is energized, the first motor 111 and the second motor 121 can be driven to operate synchronously. Thereby, the synchronization of the electric fall chain action can be ensured, the potential safety hazards to personnel caused by inconsistent manual start and stop actions can be avoided, and the safety and reliability of operation can be improved.

[0047] Optionally, the linkage control box 130 may include a second air switch 134 and a third air switch 135;

[0048] The main contact outlet terminals of the first contactor 132 and the second contactor 133 are both connected to the three-phase winding of the first motor 111 through the second air switch 134, and the main contact outlet terminals of the first contactor 132 and the second contactor 133 are both connected to the three-phase winding of the second motor 121 through the third air switch 135.

[0049] It should be understood that the second air switch 134 and the third air switch 135 can provide power to the first motor 111 and the second motor 121 respectively. When a fault occurs, the power supply status of the first motor 111 and the second motor 121 can be checked respectively through the second air switch 134 and the third air switch 135, which helps to quickly locate the cause of the fault, thereby improving operational safety and reliability.

[0050] Optionally, the linkage control box 130 may include a first control button and a second control button;

[0051] The first control button normally open contact 11, the second control button normally closed contact 22, the first contactor coil 31 and the second contactor normally closed contact 42 are sequentially connected in series to form a first control circuit;

[0052] The second control button normally open contact 21, the first control button normally closed contact 12, the second contactor coil 41 and the first contactor normally closed contact 32 are sequentially connected in series to form a second control circuit.

[0053] It should be understood that according to the above connection method, when the first control button is pressed, the second contactor cannot be attracted because the second control button's normally closed contact 22 is disconnected; when the second control button is pressed, the first contactor cannot be attracted because the first control button's normally closed contact 12 is disconnected. When the first contactor is attracted, the first contactor's normally closed contact 32 will disconnect the control circuit of the second contactor's coil 41, thereby preventing the second contactor from being attracted at the same time; when the second contactor is attracted, the second contactor's normally closed contact 42 can disconnect the control circuit of the first contactor's coil 31, thereby preventing the first contactor from being attracted at the same time. This achieves interlocking protection between the two contactors, ensuring that they will not be attracted at the same time, avoiding the risk of power short circuits, and improving operational safety and reliability.

[0054] Optionally, the linkage control box 130 may include a first indicator light 136 and a second indicator light 137;

[0055] The first contactor normally open contact 33 and the first indicator light 136 are connected in series to form a first indicator light circuit;

[0056] The second contactor normally open contact 43 and the second indicator light 137 are connected in series to form a second indicator light circuit.

[0057] It should be understood that when the first contactor is energized, the normally open contact 33 of the first contactor is closed and the first indicator light 136 can be illuminated. Similarly, when the second contactor is energized, the normally open contact 43 of the second contactor is closed and the second indicator light 137 can be illuminated. Therefore, by observing the on and off conditions of the indicator lights, the working status of each contactor can be quickly determined, providing a reliable basis for fault diagnosis and maintenance.

[0058] Optionally, the first control circuit, the second control circuit, the first indicator light circuit, and the second indicator light circuit are all connected in parallel.

[0059] It should be understood that parallel connection can reduce electromagnetic interference between lines, facilitate rapid location and resolution of problems, and improve the maintainability and operational safety of the system.

[0060] Optionally, the linkage control box 130 may include a fuse 138;

[0061] The three-phase power supply is connected to the incoming line terminal of the first air switch 131 through the fuse 138 .

[0062] It should be understood that the primary function of fuse 138 is to quickly disconnect the circuit when the current exceeds a predetermined value, preventing excessive current from damaging the circuit and equipment. Furthermore, in the event of a short circuit, fuse 138 quickly blows, severing the circuit and preventing further damage from the short-circuit current. This protects electrical equipment from overload and short-circuit damage, extending its lifespan.

[0063] Optionally, the linkage control box 130 may include a first thermal relay and a second thermal relay;

[0064] The output terminal of the second air switch is connected to the three-phase winding of the first motor 111 through the first thermal relay, and the output terminal of the third air switch is connected to the three-phase winding of the second motor 121 through the second thermal relay.

[0065] It should be understood that a thermal relay can be used to monitor the motor's operating current. When the motor current exceeds a set value, the thermal relay contacts open, cutting off the motor's power supply and protecting the motor from overload damage. Furthermore, the operating status of the thermal relay contacts can reflect the motor's operating conditions. If the thermal relay overheats and causes the contacts to open, the faulty motor can be quickly located, facilitating repairs and improving operational safety and reliability.

[0066] Optionally, the fixed end of the first electric fall chain 110 and the fixed end of the second electric fall chain 120 may both be connected to a preset fixing component in the factory building, or both be connected to a preset lifting ring of the generator stator chamber.

[0067] For example, during the process of pulling out the rotor, the fixed end of the electric fall chain can be installed on a steel beam, column or other fixed structure inside the factory building according to actual conditions. This fixed structure is located in the direction in which the rotor is to be pulled out, thereby ensuring that the pulling direction of the electric fall chain is consistent with the direction in which the rotor is pulled out, avoiding the generation of skew or yaw torque.

[0068] For example, during the process of installing the rotor, the fixed end of the electric chain can be connected to the lifting ring provided at the upper end of the stator chamber of the generator, and the two electric rings are symmetrically distributed on the left and right. The height can be selected according to the specific motor structure, and the embodiment of the present disclosure does not limit this.

[0069] Optionally, the electric fall chain may be a chain-type electric fall chain.

[0070] It should be understood that the chain of the ring-type electric fall chain is made of high-strength alloy steel, has good durability and impact resistance, and can flexibly increase or decrease the number of links according to actual needs, with high scalability and safety.

[0071] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0072] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0073] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An electric chain-falling linkage device, characterized in that: The electric fall chain linkage device comprises a first electric fall chain (110), a second electric fall chain (120) and a linkage control box (130), wherein the first electric fall chain (110) and the second electric fall chain (120) are both electrically connected to the linkage control box (130); The movable end of the first electric fall chain (110) is connected to a first preset position of the generator rotor rear bracket, and the movable end of the second electric fall chain (120) is connected to a second preset position of the generator rotor rear bracket, the first preset position and the second preset position are respectively located on both sides of the generator rotor rear bracket, and are used to extract the generator rotor from the stator bore or insert the stator bore; The linkage control box (130) is arranged at a preset position in the factory building.

2. The electric chain-falling linkage device according to claim 1, characterized in that: The first electric fall chain (110) includes a first motor (111), the second electric fall chain (120) includes a second motor (121), and the linkage control box (130) includes a first air switch (131), a first contactor (132), and a second contactor (133); The inlet terminal of the first air switch (131) is connected to a three-phase power supply, and the outlet terminal of the first air switch (131) is respectively connected to the main contact inlet terminal of the first contactor (132) and the main contact inlet terminal of the second contactor (133); The main contact output terminals of the first contactor (132) are respectively connected to the three-phase winding of the first motor (111) and the three-phase winding of the second motor (121) according to a first preset phase sequence, and the main contact output terminals of the second contactor (133) are respectively connected to the three-phase winding of the first motor (111) and the three-phase winding of the second motor (121) according to a second preset phase sequence.

3. The electric chain-falling linkage device according to claim 2, characterized in that: The linkage control box (130) includes a second air switch (134) and a third air switch (135); The main contact outlet terminal of the first contactor (132) and the main contact outlet terminal of the second contactor (133) are both connected to the three-phase winding of the first motor (111) through the second air switch (134), and the main contact outlet terminal of the first contactor (132) and the main contact outlet terminal of the second contactor (133) are both connected to the three-phase winding of the second motor (121) through the third air switch (135).

4. The electric chain-falling linkage device according to claim 3, characterized in that: The linkage control box (130) comprises a first control button and a second control button; The first control button normally open contact (11), the second control button normally closed contact (22), the first contactor coil (31) and the second contactor normally closed contact (42) are sequentially connected in series to form a first control circuit; The second control button normally open contact (21), the first control button normally closed contact (12), the second contactor coil (41) and the first contactor normally closed contact (32) are sequentially connected in series to form a second control circuit.

5. The electric chain-falling linkage device according to claim 4, characterized in that: The linkage control box (130) includes a first indicator light (136) and a second indicator light (137); The first contactor normally open contact (33) and the first indicator light (136) are connected in series to form a first indicator light circuit; The second contactor normally open contact (43) and the second indicator light (137) are connected in series to form a second indicator light circuit.

6. The electric chain-falling linkage device according to claim 5, characterized in that: The first control circuit, the second control circuit, the first indicator light circuit, and the second indicator light circuit are all connected in parallel.

7. The electric chain-falling linkage device according to claim 2, characterized in that: The linkage control box (130) includes a fuse (138); The three-phase power supply is connected to the incoming line terminal of the first air switch (131) via the fuse (138).

8. The electric chain-fall linkage device according to claim 3, characterized in that: The linkage control box (130) comprises a first thermal relay and a second thermal relay; The output terminal of the second air switch (134) is connected to the three-phase winding of the first motor (111) through the first thermal relay, and the output terminal of the third air switch (135) is connected to the three-phase winding of the second motor (121) through the second thermal relay.

9. The electric chain-fall linkage device according to claim 1, characterized in that: The fixed end of the first electric fall chain (110) and the fixed end of the second electric fall chain (120) are both connected to a preset fixed component in the factory building, or are both connected to a preset lifting ring of the generator stator chamber.

10. The electric chain-fall linkage device according to claim 1, characterized in that: The electric fall chain is a ring chain type electric fall chain.

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