Generator disconnector and generator system

Abstract

The utility model discloses a generator isolating switch and generator system belong to generator field, and the transmission mechanism of this generator isolating switch contains turning crank arm and insulation transmission rod, one end of turning crank arm is fixedly connected with rotating drive shaft, and the other end is hinged with one end of insulation transmission rod, one end of insulation transmission rod away from turning crank arm is hinged with starting knife contact, when rotating drive shaft rotates, turning crank arm drives starting knife contact to slide up and down in insulation sleeve, the rotating drive shaft of the motor of this generator isolating switch directly drives starting knife contact to realize current conduction or disconnect through turning crank arm and insulation transmission rod, and the structure is simple, and transmission is stable, and insulation sleeve and insulation transmission rod insulate and protect in many places, further guarantee the security of isolating switch operation.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and more specifically, to a generator disconnect switch and a generator system. Background Technology

[0002] Generator disconnect switches are key devices in power systems used for the safe isolation of power sources. Their core function is to create a visible physical break during generator maintenance or repair, ensuring the safety of personnel and equipment. They typically employ high-strength insulating supports and reliable contact structures (such as clamp-type designs), and achieve opening and closing operations through mechanical transmission.

[0003] For example, Chinese patent document (CN 119764102 A) provides a disconnecting switch and generator system for a generator starting circuit. The disconnecting switch includes: a conductive housing; a static contact member disposed at one end inside the conductive housing, the static contact member including a static arc contact; and a moving contact member disposed opposite to the static contact member and located at the other end inside the conductive housing, the moving contact member including a transmission member and a moving arc contact, one end of the transmission member being used to receive external power and the other end being provided with a moving contact, the transmission member being able to move relative to the conductive housing in a first direction under the action of external power, and being able to drive the moving arc contact to contact the static arc contact.

[0004] The system includes three disconnect switches, each corresponding to one of the three circuits of the three-phase generator. The conductive housings of the three-phase disconnect switches are all fixed to a steel structure support. An operating mechanism for operating the disconnect switches is provided on one side of the steel structure support, and the operating mechanism is electrically connected to the disconnect switches.

[0005] Furthermore, the operating mechanism performs three-phase linkage operation on the disconnect switches, meaning that a single operation controls the synchronous start or stop of all three disconnect switches. Currently available disconnect switches on the market are all three-phase linkage devices, as is the case in Chinese patent document (CN 119889969A).

[0006] However, the transmission stability of this type of three-phase linkage disconnect switch is not high, and it often faces the problem of needing maintenance.

[0007] The relevant technologies do not provide effective solutions to the above problems. Utility Model Content

[0008] To address potential problems with generator disconnect switches in related technologies, some embodiments of this application provide a generator disconnect switch, comprising: a frame, a motor fixed to the frame, the rotation drive shaft of the motor extending into the inner cavity of the frame; an insulating support member fixed to the upper side of the frame, and a conductive cylinder fixed to the insulating support member; A conductive cylinder is provided with an insulating sleeve at the top, and an upper connecting contact seat and a lower connecting contact seat are respectively provided at the upper and lower ends of the insulating sleeve; The starting knife contact is movably disposed in the inner cavity of the conductive cylinder and the insulating sleeve via a transmission mechanism. The starting knife contact is used to connect or disconnect the upper connecting contact seat and the lower connecting contact seat. The transmission mechanism includes a turning crank arm and an insulated transmission rod; one end of the turning crank arm is fixedly connected to the rotary drive shaft, and the other end is hinged to one end of the insulated transmission rod; the end of the insulated transmission rod away from the turning crank arm is hinged to the starting knife contact. When the rotary drive shaft rotates, the turning arm drives the starting knife contact to slide up and down inside the insulating sleeve.

[0009] Furthermore, the frame is fixed with an opening signal switch and a closing signal switch; the opening signal switch is located above the rotary drive shaft, and the closing signal switch is located below the rotary drive shaft; when the two ends of the starting knife contact contact the upper and lower connecting contact seats respectively, the insulating transmission rod can press the opening signal switch to send an opening signal; when the starting knife contact disconnects from the upper connecting contact seat and moves to a designated position, the insulating transmission rod can press the closing signal switch.

[0010] Furthermore, the frame is fixed with a first limiting protrusion and a second limiting protrusion; the first limiting protrusion is located above the rotary drive shaft; the second limiting protrusion is located below the rotary drive shaft; when the two ends of the starting knife contact contact the upper connecting contact seat and the lower connecting contact seat respectively, the first limiting protrusion abuts against the turning crank arm; when the starting knife contact disconnects from the upper connecting contact seat and moves to a designated position, the second limiting protrusion abuts against the turning crank arm.

[0011] Furthermore, the wall of the insulating sleeve is corrugated, and / or the outer wall of the insulating transmission rod has several annular protrusions.

[0012] Furthermore, the inner wall of the insulating sleeve is formed with a guide hole, which gradually expands from top to bottom, so that the inner wall of the guide hole forms a guide slope; the top of the starting knife contact is formed with a mating slope that cooperates with the guide slope.

[0013] Furthermore, elastic contact fingers are fixed to the lower outer sides of the upper and lower contact seats respectively.

[0014] Furthermore, the insulating support is columnar and comprises at least four.

[0015] To achieve the above objectives, some embodiments of this application also provide a generator system, including a three-phase generator and the generator disconnect switches described above. There are three generator disconnect switches, each corresponding to one of the three circuits of the three-phase generator, and each of the three generator disconnect switches has one of the generators.

[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages: The generator disconnect switch provided in this application has a motor rotation drive shaft that directly drives the starting knife contact to achieve current conduction or disconnection through a turning crank arm and an insulating transmission rod. It has a simple structure, stable transmission, and multiple insulation protections in the insulating sleeve and insulating transmission rod, further ensuring the safety of disconnect switch operation. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of a generator disconnect switch structure according to an embodiment of this application; Figure 2 This is a partial cross-sectional view of a generator disconnector according to an embodiment of this application; Figure 3 This is a partial cross-sectional view of a generator disconnector according to an embodiment of this application; Label Explanation: 100. Frame; 110. Motor; 111. Rotary drive shaft; 120. Insulating support; 130. Gate opening signal switch; 140. Gate closing signal switch; 150. First limit protrusion; 160. Second limit protrusion; 200. Conductive cylinder; 300, Insulating sleeve; 310, Upper connecting contact seat; 320, Lower connecting contact seat; 330, Guide hole; 331, Guide slope; 340, Flexible contact finger; 400. Starter contact; 410. Contact head; 420. Mating bevel; 500. Transmission mechanism; 510. Turning crank arm; 520. Insulated transmission rod. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0021] like Figure 1-3 As shown, this application provides a generator disconnect switch, including a frame 100, a conductive cylinder 200, an insulating sleeve 300, a starting knife contact 400, and a transmission mechanism 500.

[0022] like Figure 2 As shown, a motor 110 is fixed to the frame 100, and the rotation drive shaft 111 of the motor 110 extends into the inner cavity of the frame 100. An insulating support 120 is fixed to the upper side of the frame 100, and a conductive cylinder 200 is fixed to the insulating support 120.

[0023] like Figure 2 As shown, an insulating sleeve 300 is provided on the top of the conductive cylinder 200, and an upper connecting contact seat 310 and a lower connecting contact seat 320 are respectively provided on the upper and lower ends of the insulating sleeve 300.

[0024] like Figure 2As shown, the starting knife contact 400 is movably disposed within the inner cavity of the conductive cylinder 200 and the insulating sleeve 300 via the transmission mechanism 500. The starting knife contact 400 is used to connect or disconnect the upper connecting contact seat 310 and the lower connecting contact seat 320. Specifically, the end of the starting knife contact 400 is formed with a contact head 410, which is used to contact the upper connecting contact seat 310 to conduct electricity.

[0025] like Figure 2 As shown, the transmission mechanism 500 includes a turning crank arm 510 and an insulated transmission rod 520. One end of the turning crank arm 510 is fixedly connected to the rotary drive shaft 111, and the other end is hinged to one end of the insulated transmission rod 520. The end of the insulated transmission rod 520 away from the turning crank arm 510 is hinged to the starting knife contact 400.

[0026] When the rotary drive shaft 111 rotates, the turning arm 510 drives the starting knife contact 400 to slide up and down inside the insulating sleeve 300.

[0027] In this way, the rotating drive shaft 111 of the motor 110 directly drives the starting knife contact 400 to conduct or disconnect the current through the turning arm 510 and the insulating transmission rod 520. The structure is simple and the transmission is stable. The insulating sleeve 300 and the insulating transmission rod 520 have multiple insulation protections, which further ensures the safety of the disconnecting switch operation.

[0028] As a specific solution, such as Figure 2 As shown, the frame 100 is fixed with an open gate signal switch 130 and a close gate signal switch 140, which are used to provide feedback on the working status of each disconnecting switch. The open gate signal switch 130 is located above the rotary drive shaft 111, and the close gate signal switch 140 is located below the rotary drive shaft 111.

[0029] like Figure 3 As shown, when the two ends of the starting knife contact 400 contact the upper connecting contact seat 310 and the lower connecting contact seat 320 respectively, the insulating transmission rod 520 can press the gate opening signal switch 130 to send a gate opening signal. Figure 2 As shown, when the starting knife contact 400 disconnects from the upper connecting contact seat 310 and moves to the designated position, the insulating transmission rod 520 can press the gate closing signal switch 140.

[0030] Reference Figure 2 , 3As shown, the specific workflow of the above scheme is as follows: When the generator disconnect switch is closed, the motor 110 rotates, driving the drive shaft 111 to rotate, which in turn drives the crank arm and the insulating transmission rod 520 to move, thereby pushing the starting knife contact 400 to move upward. After reaching the closed position, the upper connecting contact seat 310 and the lower connecting contact seat 320 of the starting knife contact 400 are connected to achieve conductivity. The insulating transmission rod 520 presses the opening signal switch 130, causing the opening signal switch 130 to output a closed position signal, and the generator starts. When the generator disconnect switch is closed, the motor 110 rotates, driving the drive shaft 111 to rotate in the opposite direction, causing the starting knife contact 400 to move downward, disengage from the upper connecting contact seat 310, and reach the designated position. After reaching the designated position, the insulating transmission rod 520 presses the closing signal switch 140, causing the closing signal switch 140 to output a tripped position signal.

[0031] Preferred, such as Figure 2 , 3 As shown, the frame 100 is fixed with a first limiting protrusion 150 and a second limiting protrusion 160. The first limiting protrusion 150 is located above the rotary drive shaft 111. The second limiting protrusion 160 is located below the rotary drive shaft 111. When the two ends of the starting knife contact 400 contact the upper connecting contact seat 310 and the lower connecting contact seat 320 respectively, the first limiting protrusion 150 abuts against the turning crank arm 510. When the starting knife contact 400 disconnects from the upper connecting contact seat 310 and moves to the designated position, the second limiting protrusion 160 abuts against the turning crank arm 510. When the motor 110 rotates the drive shaft 111 and does not rotate, the limiting protrusion can bear part of the weight of the transmission mechanism 500, preventing the motor 110 from being damaged by excessive torque on the drive shaft 111. Furthermore, this design can also prevent most of the weight from pressing on the gate opening signal switch 130 or the gate closing signal switch 140, thereby avoiding mechanical damage to the gate opening signal switch 130 and the gate closing signal switch 140.

[0032] Specifically, such as Figure 3 As shown, the wall of the insulating sleeve 300 is corrugated, and / or the outer wall of the insulating transmission rod 520 has several annular protrusions. This design is used to increase the creepage distance and increase the structural strength, thereby effectively resisting the electrodynamic forces generated by dynamic and thermal instability.

[0033] As a better option, such as Figure 3 As shown, the inner wall of the insulating sleeve 300 has a guide hole 330, which gradually expands from top to bottom, forming a guide slope 331 on the inner wall of the guide hole 330. The top of the starting knife contact 400 has a mating slope 420 that mates with the guide slope 331. During the operation of the starting knife contact 400, the mating slope 420 and the guide slope 331 come into contact with each other, guiding the starting knife contact 400 to make as precise a contact as possible with the upper connecting contact seat 310, preventing the starting knife head from shifting during operation.

[0034] As a specific solution, such as Figure 2 , 3 As shown, elastic contact fingers 340 are fixed to the lower outer sides of the upper contact seat 310 and the lower contact seat 320 respectively. The elastic contact fingers 340 are equipped with pressure springs to ensure that there is sufficient pressure when the starting knife contact 400 contacts the upper contact seat 310.

[0035] Preferably, the insulating support 120 is columnar and includes at least two, for example four, to stably support the conductive cylinder 200.

[0036] Specifically, due to transmission and protection requirements, the insulating support 120, the insulating sleeve 300, and the insulating transmission rod 520 are all made of insulating materials with high hardness, such as nylon, FR4, G10, etc.

[0037] As a specific implementation scheme, this scheme also provides a generator system, including a three-phase generator and the generator disconnect switches of the above embodiment. There are three generator disconnect switches, which correspond to the three circuits of the three-phase generator respectively. Each of the three generator disconnect switches has a motor 110. The disconnect switches of this generator system can work stably and efficiently, avoid transmission errors, and reduce maintenance costs.

[0038] In this application, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A generator isolating switch, characterized in that include: A frame, on which a motor is fixed, the rotation drive shaft of the motor extending into the inner cavity of the frame; an insulating support is fixed on the upper side of the frame, and a conductive cylinder is fixed on the insulating support; A conductive cylinder is provided with an insulating sleeve at the top, and an upper connecting contact seat and a lower connecting contact seat are respectively provided at the upper and lower ends of the insulating sleeve; The starting knife contact is movably disposed in the inner cavity of the conductive cylinder and the insulating sleeve via a transmission mechanism. The starting knife contact is used to connect or disconnect the upper connecting contact seat and the lower connecting contact seat. The transmission mechanism includes a turning crank arm and an insulated transmission rod; one end of the turning crank arm is fixedly connected to the rotary drive shaft, and the other end is hinged to one end of the insulated transmission rod; the end of the insulated transmission rod away from the turning crank arm is hinged to the starting knife contact. When the rotary drive shaft rotates, the turning arm drives the starting knife contact to slide up and down inside the insulating sleeve.

2. The generator disconnect switch according to claim 1, characterized in that: The frame is fixed with an opening signal switch and a closing signal switch; The gate opening signal switch is located above the rotary drive shaft, and the gate closing signal switch is located below the rotary drive shaft; When the two ends of the starting knife contact contact the upper and lower connecting contact seats respectively, the insulating transmission rod can press the gate opening signal switch to send a gate opening signal; when the starting knife contact disconnects from the upper connecting contact seat and moves to a designated position, the insulating transmission rod can press the gate closing signal switch.

3. A generator disconnect switch according to claim 2, characterized in that: The frame is fixed with a first limiting protrusion and a second limiting protrusion; The first limiting protrusion is located above the rotary drive shaft; the second limiting protrusion is located below the rotary drive shaft. When the two ends of the starting knife contact contact the upper and lower connecting contact seats respectively, the first limiting protrusion abuts against the turning crank arm; when the starting knife contact disconnects from the upper connecting contact seat and moves to the designated position, the second limiting protrusion abuts against the turning crank arm.

4. A generator disconnect switch according to claim 1, characterized in that: The insulating sleeve has a corrugated wall, and / or the insulating transmission rod has several annular protrusions on its outer wall.

5. A generator disconnect switch according to claim 1, characterized in that: The inner wall of the insulating sleeve is formed with a guide hole, which gradually expands from top to bottom, so that the inner wall of the guide hole forms a guide slope. The top of the starting knife contact has a mating slope that engages with the guide slope.

6. A generator disconnect switch according to claim 1, characterized in that: The lower outer sides of the upper and lower connecting contact seats are respectively fixed with elastic contact fingers.

7. A generator disconnect switch according to claim 1, characterized in that: The insulating support is columnar and comprises at least two.

8. A generator system, characterized in that: The three-phase generator and the generator disconnector according to any one of claims 1-7 are included, and there are three generator disconnectors in total, each corresponding to one loop of the three-phase generator, and each having one motor.

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