On-load tap-changer driving mechanism of springless quick mechanism

Abstract

The utility model relates to an on-load tap-changer driving mechanism of a spring-free quick mechanism, and relates to the technical field of on-load tap-changers, the on-load tap-changer driving mechanism comprises an electric device, a driving piece is arranged in the electric device, the driving piece is connected with a worm gear box through a transmission device, and a shifting wheel is connected below the worm gear box. The driving piece drives the shifting wheel to rotate through the transmission device and the worm gear box; one side of the shifting wheel is in transmission connection with a grooved wheel, and the grooved wheel is used for driving the change-over switch to work; and an independent power supply is arranged in the electric device and is used for supplying power to the driving piece. The on-load tap-changer has the advantages that no quick spring switching mechanism is provided, the problem that the on-load tap-changer breaks down due to rigidity change in the using process of a spring quick mechanism is solved, and the operation risk and the maintenance cost of the on-load tap-changer are reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of on-load tap changers, in particular to a spring-free quick mechanism on-load tap changer driving mechanism. BACKGROUND

[0002] The on-load tap changer refers to a voltage regulating device suitable for operation under transformer excitation or load, which is used to change the tap connection position of the transformer winding, the basic principle of which is to realize the switching between the taps in the transformer winding under the condition of ensuring uninterrupted load current, so as to change the number of turns of the winding, that is, the voltage ratio of the transformer, and finally realize the purpose of voltage regulation.

[0003] The commonly used on-load tap changer comprises an electric device, a transmission device, a worm gear box and a switching switch, the electric device drives the notch wheel arranged on the top of the switching switch through the transmission device and the worm gear box, the notch wheel drives the switching switch to work, so that the voltage gear is adjusted.

[0004] In the current on-load tap changer, the voltage regulation is mainly realized by rotating the notch wheel through the gear transmission of the worm gear box and the shifting rod, the quick rotation of the notch wheel is realized by using the spring quick mechanism arranged on the shifting rod, the energy storage and potential energy process of the spring can quickly realize the voltage gear shifting process. At the same time, the spring quick mechanism can continue to pull the shifting rod under the condition of external power failure, so that the voltage is kept at the original gear or switched to the next gear, and the situation of gear vacancy is reduced. However, the stiffness of the spring in the spring quick mechanism changes with the deformation degree and the use time in the working process, which leads to unstable reset force, affects the reset accuracy and reliability, affects the reliable operation of the on-load tap changer, and increases the maintenance difficulty and cost of the on-load tap changer. CONTENT OF THE INVENTION

[0005] In order to reduce the operation risk and maintenance cost of the on-load tap changer, the application provides a spring-free quick mechanism on-load tap changer driving mechanism.

[0006] The spring-free quick mechanism on-load tap changer driving mechanism provided by the application adopts the following technical scheme:

[0007] The spring-free quick mechanism on-load tap changer driving mechanism comprises an electric device, a driving member is arranged in the electric device, a worm gear box is connected to the driving member through a transmission device, a shifting wheel is connected below the worm gear box, and the driving member drives the shifting wheel to rotate through the transmission device and the worm gear box; a notch wheel is transmissionally connected to one side of the shifting wheel, the notch wheel is used to drive a switching switch to work; an independent power supply is arranged in the electric device, and the independent power supply is used to supply power to the driving member.

[0008] By adopting the technical scheme, the independent power supply independently supplies power to the driving member, the driving member drives the dial wheel to rotate by using the transmission device, the dial wheel directly drives the notch wheel to rotate, the possibility of the load tap changer being in an idle state due to power failure of an external circuit is reduced, the process of the load tap changer rotating by using a spring quick mechanism is cancelled, the problem of the load tap changer being faulty due to stiffness change in the process of using the spring quick mechanism is solved, and the operation risk and maintenance cost of the load tap changer are reduced.

[0009] Optionally, the independent power supply is a rechargeable power supply.

[0010] By adopting the technical scheme, the independent power supply can be charged to prolong the working time of the driving member, and the service life of the driving mechanism of the load tap changer is improved.

[0011] Optionally, an electric control device is further arranged between the independent power supply and the driving member, and the electric control device is electrically connected with the independent power supply and the driving member.

[0012] By adopting the technical scheme, the electric control device can monitor the power of the independent power supply and the working state of the driving member, when the power of the independent power supply is insufficient and the driving member stops working, the electric control device can control the external circuit to charge the independent power supply, and the possibility of the driving member stopping working due to power failure of the independent power supply is reduced.

[0013] Optionally, the dial wheel is provided with a convex part, the convex part is provided with a dial rod, the notch wheel is uniformly provided with a plurality of connecting blocks on the circumferential side, recesses are formed between adjacent connecting blocks, and the dial rod is located in the recess.

[0014] By adopting the technical scheme, when the dial wheel rotates, the dial rod can be inserted into the recess, the dial rod can drive the notch wheel to rotate along with the continuous rotation of the dial wheel, the connecting blocks are uniformly arranged on the circumferential side of the notch wheel, the continuous rotation of the dial wheel is converted into the interval rotation of the notch wheel, and the gear shifting work of the switch is realized.

[0015] Optionally, the outer side of the connecting block is provided with an inner concave arc surface, and the side surface of the dial wheel abuts against the inner concave arc surface.

[0016] By adopting the technical scheme, the inner arc surface arranged on the outer side of the connecting block abuts against the side surface of the dial wheel, so that the dial wheel can be clamped to the notch wheel when the dial wheel rotates, and the stability of the connection between the dial wheel and the notch wheel is improved.

[0017] Optionally, the transmission device comprises a speed reduction gear box connected with the driving member, the speed reduction gear box is connected with a first transmission rod, the first transmission rod is drivingly connected with a second transmission rod, and the second transmission rod is connected with the worm gear box.

[0018] By adopting the technical scheme, the driving member drives the worm gear box to work through the first transmission rod and the second transmission rod, and then directly drives the dial to rotate through the worm gear box.

[0019] Optionally, the worm gear is arranged in the worm gear box, the worm gear is connected with the second transmission rod, the worm gear is drivingly connected with a worm wheel in the worm gear box, a connecting shaft is connected with the worm wheel, and one end of the connecting shaft extends out of the worm gear box and is connected with the dial.

[0020] By adopting the technical scheme, the connection of the second transmission rod and the worm gear and the driving connection of the worm gear and the worm wheel realize the rotation of the connecting shaft, and then the dial directly connected with the connecting shaft rotates.

[0021] Optionally, the independent power supply is detachably connected in the electric device.

[0022] By adopting the above technical scheme, the independent power supply is detachably connected in the electric device, so that the independent power supply can be replaced after being damaged.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The worm gear box is directly connected with the dial, and the dial is directly connected with the notch wheel, so that the process of realizing the rotation of the notch wheel by the spring quick mechanism of the on-load tap changer is cancelled, the problem of on-load tap changer failure caused by stiffness change in the use process of the spring quick mechanism is improved, and the operation risk and maintenance cost of the on-load tap changer are reduced.

[0025] 2. The independent power supply is used to supply power to the driving member, so that the work of the driving member is not affected by the power failure of the external line, and the possibility of on-load tap changer emptying is reduced.

[0026] 3. The electric control device is arranged, the electric control device can control the work of the independent power supply and the driving member, the electric control device can monitor the power of the independent power supply and the working state of the driving member, when the power of the external power supply is insufficient and the driving member stops working, the electric control device can control the circuit to charge the independent power supply, and the possibility of the driving member stopping working caused by the power failure of the independent power supply is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole structure schematic view of the on-load tap changer driving mechanism without spring quick mechanism of the present application.

[0028] Figure 2 This is a first structural schematic diagram of the worm gear box, dial wheel and grooved wheel of a springless fast mechanism on-load tap changer drive mechanism according to this application;

[0029] Figure 3 This is a first structural schematic diagram of the worm gear box, dial wheel and grooved wheel of a springless fast mechanism on-load tap changer drive mechanism according to this application;

[0030] Figure 4 This is a schematic diagram of the worm gear box of an on-load tap changer drive mechanism with a springless fast mechanism according to this application.

[0031] In the diagram: 1. Electric actuator; 101. Drive unit; 102. Independent power supply; 103. Electric controller; 2. Transmission device; 201. Reduction gear box; 202. First transmission rod; 203. Second transmission rod; 3. Worm gear box; 301. Connecting shaft; 302. Worm; 303. Worm wheel; 4. Switch; 5. Dial wheel; 501. Dial plate; 502. Dial lever; 503. Connecting part; 6. Grooved wheel; 601. Connecting block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail below.

[0033] This application discloses a springless, fast-response on-load tap changer drive mechanism. For example... Figure 1 As shown, the on-load tap changer drive mechanism includes an electric actuator 1, within which a drive component 101 is installed. Preferably, the drive component 101 is a high-speed motor, ensuring that the changeover switch 4 can quickly shift gears. The drive component 101 has an independent power supply 102 installed within the electric actuator 1. The independent power supply 102 is bolted to the electric actuator 1, facilitating replacement in case of damage. The independent power supply 102 can independently power the drive component 101, ensuring that its operation is unaffected by external power outages and reducing the possibility of the on-load tap changer operating in neutral due to external power failures.

[0034] like Figure 1 As shown, an electronic controller 103 is also provided in the electric device 1. The electronic controller 103 is electrically connected to the independent power supply 102 and the drive unit 101. The electronic controller 103 can monitor the power level of the independent power supply 102 and the working status of the drive unit 101. When the power level of the independent power supply 102 is insufficient and the drive unit 101 stops working, the electronic controller 103 can control the external circuit to charge the independent power supply 102, reducing the possibility of the drive unit 101 stopping working due to a power outage of the independent power supply 102.

[0035] likeFigure 1 As shown, a transmission device 2 and a worm gear box 3 are connected between the drive component 101 and the switch 4. The transmission device 2 includes a reduction gear box 201 connected to the drive component 101. A first transmission rod 202 is connected to the top of the reduction gear box 201. The vertical first transmission rod 202 is connected to a horizontal second transmission rod 203. The second transmission rod 203 is connected to the worm gear box 3 located above the switch 4. The drive component 101 drives the worm gear box 303 through the transmission device 2.

[0036] Among them, such as Figure 4 As shown, a worm 302 is installed inside the worm gear box 3, and a second connecting rod is connected to the worm 302. A worm wheel 303, which is drively connected to the worm 302, is also installed inside the worm gear box 3. A connecting shaft 301 is connected to the worm wheel 303, and the connecting shaft 301 extends out of the worm wheel box 303 and is fixedly connected to the lever 502. The worm wheel box 303 and the transmission device 2 enable the drive component 101 to drive the connecting shaft 301, thereby realizing the rotation of the lever 5, which is directly connected to the connecting shaft 301.

[0037] like Figure 2 and Figure 3 As shown, the dial 5 is composed of a pair of paddles 501 connected by a connecting part 503 in the middle, which is generally disc-shaped. Each paddle 501 has a protrusion, and a lever 502 is fixedly connected between the protrusions of the two paddles 501. A grooved wheel 6 is provided on one side of the dial 5, and several connecting blocks 601 are evenly arranged on the grooved wheel 6. In this embodiment, six connecting blocks 601 are evenly arranged. The outer surface of the connecting block 601 forms a concave arc surface, which matches the arc surface of the connecting part 503. When the dial 5 rotates, the arc surface of the connecting part 503 abuts against the concave arc surface of the connecting block 601, allowing the dial 5 to engage the grooved wheel 6 during rotation, thus improving the stability of the grooved wheel 6. When the dial wheel 5 rotates, causing the lever 502 to enter the groove between adjacent connecting blocks 601, the rotation of the dial wheel 5 causes the lever 502 to abut against the inner wall of the groove, thereby driving the rotation of the groove wheel 6. This converts the continuous rotation of the dial wheel 5 into the intermittent rotation of the groove wheel 6. The groove wheel 6 is connected to the switching switch 4 below and drives the switching switch 4 to work, thus realizing the adjustment of the on-load tap changer.

[0038] The implementation principle of the on-load tap changer drive mechanism of the springless fast mechanism in this application embodiment is as follows:

[0039] When voltage regulation is needed, the driving member 101 drives the connecting shaft 301 in the worm wheel box 3 to rotate through the transmission device 2. Since the connecting shaft 301 is directly connected with the dial wheel 5, and the driving member 101 is a high-speed motor, the dial wheel 5 can quickly drive the notch wheel 6 to rotate, thereby realizing the quick voltage shift of the on-load tap changer. Meanwhile, the driving member 101 is connected with the independent power supply 102, and an electric control device 103 is arranged to monitor the working states of the driving member 101 and the independent power supply 102. When the independent power supply 102 and the driving member 101 stop working, the electric control device 103 can control the external circuit to charge the independent power supply 102, so that the on-load tap changer is not affected by the power-off of the external circuit, and the possibility of the on-load tap changer being in an idle gear due to the power-off of the external circuit is reduced.

[0040] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A springless quick-action mechanism on-load tap changer drive mechanism, comprising an electric device (1), a drive member (101) is arranged in the electric device (1), a worm gear box (3) is connected to the drive member (101) through a transmission device (2), characterized in that, The worm gear box (3) is connected with a dial wheel (5) below, the driving part (101) drives the dial wheel (5) to rotate through the transmission device (2) and the worm gear box (3), one side of the dial wheel (5) is drivingly connected with a notched wheel (6), the notched wheel (6) is used for driving the switch (4) to work, the electric device (1) is provided with an independent power supply (102), and the independent power supply (102) is used for power supply to the driving part (101).

2. A drive mechanism for a springless on-load tap changer according to claim 1, characterized in that The independent power supply (102) is a rechargeable power supply.

3. A drive mechanism for a springless on-load tap changer according to claim 2, characterized in that The independent power supply (102) and the driving part (101) are further provided with an electric control device (103), and the electric control device (103) is electrically connected with the independent power supply (102) and the driving part (101).

4. A drive mechanism for a springless on-load tap changer according to claim 1, characterized in that The dial wheel (5) is provided with a convex part, the convex part is provided with a dial rod (502), the notched wheel (6) is uniformly provided with a plurality of connecting blocks (601) on the circumferential side, recesses are formed between adjacent connecting blocks (601), and the dial rod (502) is located in the recess.

5. A drive mechanism for a springless on-load tap changer according to claim 4, characterized in that The outer side of the connecting block (601) is provided with an inner concave arc surface, and the side surface of the dial wheel (5) is in abutment with the inner concave arc surface.

6. A drive mechanism for a springless on-load tap changer according to claim 1, characterized in that The transmission device (2) comprises a speed reduction gear box (201) connected with the driving part (101), the speed reduction gear box (201) is connected with a first transmission rod (202), the first transmission rod (202) is drivingly connected with a second transmission rod (203), and the second transmission rod (203) is connected with the worm gear box (3).

7. A drive mechanism for a springless on-load tap changer according to claim 6, characterized in that The worm gear box (3) is provided with a worm (302), the worm (302) is connected with the second transmission rod (203), the worm (302) is drivingly connected with a worm wheel (303) in the worm gear box (3), the worm wheel (303) is connected with a connecting shaft (301), and one end of the connecting shaft (301) extends out of the worm gear box (3) and is connected with the dial wheel (5).

8. A springless quick-action drive mechanism for a load tap changer, according to claim 1, characterized in that, The independent power supply (102) is detachably connected in the electric device (1).

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