Multi-fracture linkage isolating switch

Abstract

The utility model discloses a multi-fracture linkage isolating switch, and belongs to the technical field of high-voltage switches. The utility model discloses a high-voltage switch, which comprises a shell and a fixed conductor, and further comprises a plurality of moving contact rods and a plurality of static contact seats, the shell is provided with a plurality of mounting ports, the static contact seats are arranged corresponding to the mounting ports, the fixed conductor is arranged in the shell, the fixed conductor is provided with a plurality of linear channels, and the moving contact rods are movably arranged on the linear channels in a matched manner. According to the utility model, the insulation shaft is mainly utilized to drive the four-quadrant crank arm to rotate, so that the three L-shaped connecting plates are driven to rotate in the fixed conductor at the same time, then the three moving contact rods are driven to move on the linear channel, and the three moving contact rods are contacted with the three static contact seats to realize electrical connection while moving; the three moving contacts are contacted with the three static contacts at the same time, so that isolation between equipment connected with adjacent mounting ports on the shell is realized, and the equipment can be independently tested and detected.

Description

Technical Field

[0001] The utility model relates to a multi-break linkage isolating switch, belonging to the technical field of high-voltage switches. Background Art

[0002] The GIS voltage transformer module in some areas requires the arrangement of the metering and protection winding modules, which requires two voltage transformer module interfaces. When a lightning arrester is used, a lightning arrester interface is also required. There are many current isolating switch arrangement structures. For example, in the prior art, Figure 1 , 2 As shown, in the single-break disconnector, the gear 9 and the rack 10 cooperate to drive the single break 1 4 to isolate the static side conductor 5. The static side conductor 5 has two interfaces (interface 1 7 and interface 2 8) to connect the corresponding protection voltage transformer 1 and the lightning arrester 3, and the dynamic side conductor has one interface (interface 3 6) to connect the corresponding metering voltage transformer 2;

[0003] The modules of the static side interface after isolation by the isolation break 4 are still electrically connected to each other, that is, the protective voltage transformer 1 and the lightning arrester 3 connected to the interface 1 7 and the interface 2 8 are electrically connected to each other, and their respective tests and inspections cannot be carried out; and the protective voltage transformer 1 and the lightning arrester 3 cannot be isolated from each other.

[0004] For another example, a double-break disconnector (publication number CN106373820A) uses two breaks driven by a gear rack to isolate the corresponding modules of two interfaces (such as lightning arrester 3, protective voltage transformer 1, and metering voltage transformer 2);

[0005] However, the above-mentioned prior art cannot open or close the break points at the same time, so when the detection is implemented, it is impossible to achieve the requirements of isolating the three modules at the same time and opening and closing the electrical circuit at the same time. Utility Model Content

[0006] The utility model provides a multi-break linkage isolating switch, which is intended to simultaneously isolate a lightning arrester, a protective voltage transformer and a metering voltage transformer, that is, one module controls the on-off and electrical insulation isolation of electrical circuits of two or more modules, thereby simplifying the product structure, reducing costs and improving reliability.

[0007] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0008] A multi-break linkage isolating switch comprises a shell and a fixed conductor, and also comprises: a plurality of moving contact rods and a plurality of static contact seats. The shell has a plurality of installation openings, and the static contact seats are arranged corresponding to the installation openings. The fixed conductor is arranged inside the shell, and a plurality of linear channels are arranged on the fixed conductor. The moving contact rod is cooperated with and movably arranged on the linear channels, and an insulating shaft is rotatably sleeved on the fixed conductor, and a crank arm is sleeved on the insulating shaft. A plurality of bent connecting plates are movably connected to the crank arm, and the two ends of the bent connecting plate are respectively hingedly connected to the free end of the crank arm and the end of the moving contact rod. When an external torque drives the insulating shaft to rotate, the crank arm is driven to rotate, and the plurality of bent connecting plates are driven to hinge and rotate, so that the plurality of moving contact rods move toward or away from the plurality of static contact seats corresponding to the plurality of moving contact rods in the plurality of linear channels at the same time, and finally the isolation between the devices connected to the adjacent installation openings on the shell is realized.

[0009] Preferably, the bent connecting plate is an L-shaped connecting plate, the crank arm is a four-quadrant crank arm, and the number of the moving contact rods and the number of the static contact seats are both four.

[0010] Preferably, a sliding groove matching the moving contact is formed at the end of each of the static contacts, one end of the moving contact slides inside the sliding groove, a guide ring is provided inside the sliding groove, and the moving contact performs linear motion in the sliding groove through the guide ring.

[0011] Preferably, the multiple fractures of the shell correspond to the linear channels for fixing the conductors.

[0012] Preferably, the four-quadrant turning arm is in the shape of a "cross" with a through hole in the middle, and the "cross"-shaped four-quadrant turning arm is sleeved on the insulating shaft through the through hole, and its side walls are rotatably connected to the L-shaped connecting plate respectively.

[0013] Preferably, a supporting conductor is provided inside the shell, the top of the supporting conductor is connected to the fixed conductor, and the fixed conductor is also installed on the shell;

[0014] Another device is installed outside the housing and is in contact with the supporting conductor.

[0015] Preferably, the moving contact rod is slidably sleeved on the linear channel.

[0016] Preferably, the insulating shaft is sleeved on the housing and the fixed conductor via a pin.

[0017] Preferably, the four-phase crank arm and the L-shaped connecting plate are hingedly connected via a pin.

[0018] Preferably, three four-quadrant crank arms as described above are commonly sleeved on the insulating shaft.

[0019] The beneficial effects of the utility model are as follows: the utility model mainly utilizes an insulating shaft to drive the four-quadrant crank arm to rotate, and drives the three L-shaped connecting plates to rotate in the fixed conductor at the same time, and then drives the three moving contact rods to move on the linear channel. The three moving contact rods move and realize contact with the three static contact seats at the same time, mainly the contact fingers on the moving contact contact the contact fingers on the static contact to realize the electrical connection of the two contact fingers;

[0020] On the other hand, the three moving contacts are in contact with the three static contacts at the same time, which realizes the isolation between the devices connected to the adjacent installation ports on the shell, that is, the mutual isolation between the protective voltage transformer, the metering voltage transformer and the lightning arrester is realized, so that the equipment can be tested and inspected separately;

[0021] Furthermore, the above structure only requires one insulating shaft and 1-3 four-quadrant crank arms to achieve the purpose of simultaneously isolating the disconnector, without the need to configure multiple isolation elements, thereby reducing production costs and application costs;

[0022] Finally, since the device is also connected to a supporting conductor, a fourth device is arranged on the outer side of the shell. The fourth device is electrically connected to the isolating switch through the supporting conductor, so that the on and off control between 1-4 devices can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the prior art;

[0024] Figure 2 It is a structural schematic diagram of a single-break disconnector in the prior art;

[0025] Figure 3 It is a structural schematic diagram of the utility model;

[0026] Figure 4 It is a cross-sectional view of the disconnector with three breaks in the embodiment of the utility model, and is also a schematic diagram of the structure when the static contact and the moving contact are not in contact;

[0027] Figure 5 for Figure 4 Schematic diagram of the structure in the middle AA direction;

[0028] Figure 6 for Figure 4 The structural diagram of part B;

[0029] Figure 7 for Figure 4 Schematic diagram of the structure of part C;

[0030] Figure 8 It is a cross-sectional view of the disconnector with three breaks in the embodiment of the utility model, and is also a schematic diagram of the structure when the static contact and the moving contact are in contact;

[0031] Fig. 9 for Figure 8 Schematic diagram of the structure in the middle DD direction;

[0032] In the figure: protective voltage transformer 1; metering voltage transformer 2; lightning arrester 3; fracture one 4; static side conductor 5; interface three 6; interface one 7; interface two 8; gear 9; rack 10; housing 11; fixed conductor 12; installation opening 13; fracture 14; insulating shaft 15; four-quadrant arm 16; L-shaped connecting plate 17; moving contact rod 18; static contact seat 19; guide ring 20; sliding groove 21; supporting conductor 22; another device 23. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific illustrations.

[0034] like Figure 3-9 As shown, a multi-break linkage disconnector comprises a housing 11 and a fixed conductor 12, a plurality of moving contact rods 18, and a plurality of stationary contact seats 19. The housing 11 has a plurality of mounting openings 13, and the stationary contact seats 19 are arranged corresponding to the mounting openings 13. The fixed conductor 12 is arranged inside the housing 11, and a plurality of linear channels are arranged on the fixed conductor 12. The moving contact rod 18 is matched and movably arranged on the linear channels, and an insulating shaft 15 is rotatably sleeved on the fixed conductor 12, and a four-quadrant turning arm 16 is sleeved on the insulating shaft 15. Three L-shaped connecting plates 17 are movably connected to the four-quadrant turning arm 16, (the shape of the four-quadrant turning arm 16 is a "cross" with a through hole in the middle, and the "cross"-shaped four-quadrant turning arm 16 is sleeved on the insulating shaft 15 through four square through holes, and its side walls are respectively connected to the The L-shaped connecting plate 17 is rotatably connected, the purpose of which is to utilize the square through hole to pass the shaft to achieve hole-shaft matching to achieve circumferential positioning, and adopt a pin shaft to achieve axial limitation). The two ends of the L-shaped connecting plate 17 are respectively hingedly connected to the free end of the four-quadrant crank arm 16 and the end of the moving contact rod 18. When the external torque drives the insulating shaft 15 to rotate (for example, driven by a motor or a push rod), the four-quadrant crank arm 16 is driven to rotate, and the three L-shaped connecting plates 17 are driven to rotate hingedly, so that the three moving contact rods 18 simultaneously move toward or away from the three static contact seats 19 corresponding to the three moving contact rods 18 in several linear channels, and finally achieve isolation between the devices connected to the adjacent installation ports 13 on the shell 11 (it should be noted that the devices connected to the three installation ports are preferably the protective voltage transformer 1, the metering voltage transformer 2 and the lightning arrester 3).

[0035] It should be noted that the three mounting openings 13 on the housing 11 correspond to the interface 1 6 , the interface 2 7 and the interface 3 8 in the prior art respectively.

[0036] A sliding groove 21 matching the moving contact 18 is formed at the end of each stationary contact 19 . One end of the moving contact 18 slides inside the sliding groove 21 . A guide ring 20 is provided inside the sliding groove 21 . The moving contact 18 performs linear motion in the sliding groove 21 through the guide ring 20 .

[0037] The ends of the moving contact 18 and the stationary contact 19 are both provided with contact fingers, and the two contact fingers are in contact to maintain a reliable electrical connection.

[0038] A supporting conductor 22 is disposed inside the housing 11 . The top of the supporting conductor 22 is connected to the fixed conductor 12 . The fixed conductor 12 is also mounted on the housing 11 .

[0039] Another device 23 is also installed outside the shell 11, and the other device 23 is in contact with the supporting conductor 22. The purpose is to use the supporting conductor 22 to electrically connect the other device 23 to the isolating switch through the supporting conductor 22, so as to achieve on-off control between 1-4 devices.

[0040] The insulating shaft 15 is sleeved with three four-quadrant crank arms 16 as described above.

[0041] The utility model adopts a single insulating shaft 15 for operation, and multiple fracture linkages are arranged in an isolation module or a contact assembly.

[0042] The utility model adopts an L-shaped connecting plate 17, a four-quadrant turning arm 16, and an integral insulating shaft 15 to drive the moving contact 18 to move. It has the characteristics of small size, simple structure, and reliable transmission, and effectively solves the problem of requiring multiple isolation elements when isolating multiple modules.

[0043] The utility model can set 1 to 4 isolation breaks according to actual needs, and control the on and off of four modules at the same time.

[0044] The external operating force can be input through the integral insulating shaft 15. The rotation of the integral insulating shaft 15 drives the four-quadrant crank arm 16 to swing. The L-shaped connecting plate 17 is respectively connected to the four-quadrant crank arm 19 and the moving contact 20 through the pin shaft. The swing torque of the four-quadrant crank arm 16 is transmitted to the moving contact 20 through the L-shaped connecting plate 17. The moving contact 20 performs linear motion in the hole of the fixed conductor 12. The moving contact 20 and the static contact 19 can be separated and closed by the positive and negative rotation of the integral insulating shaft 15.

[0045] The hole of the fixed conductor 12 is provided with a contact finger to realize reliable electrical connection, and a guide ring 21 is provided to realize the linear movement of the moving contact 20;

[0046] The static contact 19 is provided with a second contact finger, which maintains a reliable electrical connection with the first contact finger on the moving contact 20 when the switch is closed.

[0047] Different distances can be preset between the stationary contact 19 and the fixed conductor 12 according to electrical performance, so as to adapt to the isolation function of different voltages.

[0048] The integral insulating shaft 15 and the four-quadrant turning arm 16 are matched with a square hole shaft to achieve circumferential positioning, and the pin shaft 11 is used to achieve axial limitation.

[0049] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-break linkage disconnector, comprising a housing and a fixed conductor, characterized in that: Also includes: Multiple moving contact rods and multiple static contact seats, the shell has multiple installation openings, the static contact seats are arranged corresponding to the installation openings, the fixed conductor is arranged inside the shell, and the fixed conductor is provided with multiple linear channels, the moving contact rod is cooperated and movably arranged on the linear channels, and an insulating shaft is rotatably sleeved on the fixed conductor, and a crank arm is sleeved on the insulating shaft, and a plurality of bent connecting plates are movably connected to the crank arm, and the two ends of the bent connecting plate are respectively hingedly connected to the free end of the crank arm and the end of the moving contact rod. When the external torque drives the insulating shaft to rotate, it drives the crank arm to rotate, and drives the plurality of bent connecting plates to rotate hingedly, so that the plurality of moving contact rods move toward or away from the plurality of static contact seats corresponding to the plurality of moving contact rods in the plurality of linear channels at the same time, and finally realizes the isolation between the devices connected to the adjacent installation openings on the shell.

2. A multi-break linkage isolating switch according to claim 1, characterized in that: The bent connecting plate is an L-shaped connecting plate, the crank arm is a four-quadrant crank arm, and the number of the moving contact rods and the number of the static contact seats are both four.

3. A multi-break linkage isolating switch according to claim 2, characterized in that: A sliding groove matching the moving contact is formed at the end of each of the static contacts, one end of the moving contact slides inside the sliding groove, a guide ring is provided inside the sliding groove, and the moving contact moves linearly in the sliding groove through the guide ring.

4. A multi-break linkage isolating switch according to claim 2, characterized in that: The multiple cutouts of the shell correspond to the linear channels for fixing the conductors.

5. The multi-break linkage isolating switch according to claim 2, characterized in that: The shape of the four-quadrant turning arm is a "cross" shape with a through hole in the middle. The "cross"-shaped four-quadrant turning arm is sleeved on the insulating shaft through the through hole, and its side walls are respectively rotatably connected to the L-shaped connecting plate.

6. A multi-break linkage isolating switch according to claim 5, characterized in that: A supporting conductor is provided inside the shell, the top of the supporting conductor is connected to the fixed conductor, and the fixed conductor is also installed on the shell; Another device is installed outside the housing and is in contact with the supporting conductor.

7. The multi-break linkage isolating switch according to claim 2, characterized in that: The moving contact rod is slidably sleeved on the linear channel.

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