Monitoring device for three-phase position of disconnecting switch

Abstract

The utility model discloses a monitoring device for the three-phase position of an isolating switch, which comprises an A-phase gear box, a B-phase gear box, a C-phase gear box and a rotary connecting rod, the A-phase gear box, the B-phase gear box and the C-phase gear box are sequentially and rotationally connected through the rotary connecting rod, and one side of the rotary connecting rod is provided with an operating mechanism for driving; the operating mechanism is provided with a first position indicator; according to the utility model, the first position indicator and the second position indicator are added to monitor the linkage of the rotary connecting rods among the A phase, the B phase and the C phase, and the next operation can be carried out if the signals of the first position indicator and the second position indicator are consistent, so that the problem that the opening and closing positions of the A-phase, B-phase and C-phase disconnecting links are inconsistent with the position indicators arranged on the operating mechanism is solved; the reliability of field switch position confirmation is improved, the economic loss caused by unexpected shutdown of the GIS equipment is avoided, the safety of the GIS equipment during operation is improved, and an effective judgment basis is provided for operators to confirm the state of the disconnecting link on site.

Description

Technical Field

[0001] The utility model relates to the field of GIS equipment, in particular to a monitoring device for the three-phase position of an isolating switch. Background Art

[0002] GIS equipment is indispensable in large power plants, large chemical plants, refineries and other power production enterprises. Its function is to enclose components such as circuit breakers, disconnectors, grounding switches, current transformers, voltage transformers, lightning arresters, busbars, incoming and outgoing bushings or cable terminals in a grounded metal shell, which is filled with SF6 gas at a certain pressure as an insulating medium and arc extinguishing medium to form a complete set of switchgear.

[0003] Disconnectors and earthing switches are indispensable components in GIS complete equipment. Their structure is a phase-independent structure. The three-phase (A phase, B phase and C phase) operation adopts transmission rod linkage operation. The three-phase disconnectors share one operating mechanism, and a position indicator is installed on the operating mechanism.

[0004] During GIS equipment operation, due to a failure in the transmission rod linkage between phases A, B, and C, phase A was successfully opened and the position indicator indicated the open position, but the B and C phase switches were still in the closed position. At this time, this abnormal phenomenon could not be detected by the position indicator, triggering serious power failure consequences. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a monitoring device for the three-phase position of the isolating switch, which is convenient for the operator to observe and confirm the open and close position status of the three-phase knife switch on site during operation. The structure is simple to install and is applicable to all GLS equipment of the same type. It greatly improves the economy and safety of the isolating switch.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a monitoring device for the three-phase position of an isolating switch, comprising an A-phase gearbox, a B-phase gearbox, a C-phase gearbox and a rotating connecting rod, wherein the A-phase gearbox, the B-phase gearbox and the C-phase gearbox are rotatably connected in sequence through the rotating connecting rod, and an operating mechanism for driving is provided on one side of the rotating connecting rod;

[0007] The operating mechanism is provided with a first position indicator, and the C-phase gearbox is provided with a second position indicator. The first position indicator and the second position indicator are used together to monitor the transmission of the A-phase gearbox, the B-phase gearbox and the C-phase gearbox and the opening and / or closing status of the isolation switch.

[0008] Furthermore, in the three-phase position monitoring device of the disconnector, preferably, the first position indicator and the second position indicator each include a gear transmission mechanism and an opening and closing display element, and the gear transmission mechanism deflects to drive the opening and closing display element to display the deflected position.

[0009] Furthermore, in the three-phase position monitoring device for the disconnector, the opening and closing display element is preferably provided with two deflection surfaces for respectively indicating the rotation of the A-phase gearbox, the B-phase gearbox and the C-phase gearbox.

[0010] Furthermore, in the three-phase position monitoring device for an isolating switch, the gear transmission mechanism preferably includes a worm and a worm wheel;

[0011] The worm is rotatably arranged on one side of the C-phase gear box and / or the operating mechanism, the worm wheel is mounted on the worm, and the display opening and closing element is mounted on the worm wheel.

[0012] Furthermore, in the three-phase position monitoring device of the isolating switch, preferably, the A-phase gearbox, the B-phase gearbox and the C-phase gearbox all include a box body, and a driving gear for driving the isolating switch to open and / or close is rotatably installed in the box body, and a linkage gear is meshed with the driving gear, and the linkage gear is cooperatively connected with the rotating connecting rod.

[0013] Furthermore, in the device for monitoring the three-phase position of an isolating switch, it is preferred that the operating mechanism is provided with a hand crank cover for manual operation.

[0014] Furthermore, in the three-phase position monitoring device of the isolating switch, the operating mechanism preferably includes a housing and a motor installed in the housing, the output end of the motor is provided with a gear transmission assembly that cooperates with the rotating connecting rod, and the housing is also provided with an interlocking locking assembly, auxiliary contacts and aviation plug elements.

[0015] Furthermore, in the device for monitoring the three-phase position of an isolating switch, it is preferred that the hand crank cover and the gear transmission assembly are cooperatively connected to each other.

[0016] The implementation of the utility model has the following beneficial effects: adding a first position indicator and a second position indicator to monitor the rotary connecting rod linkage between phases A, B and C, and the next operation can only be performed when the signals of the first position indicator and the second position indicator are consistent, thereby avoiding the problem of inconsistency between the opening and closing positions of the A-phase, B-phase and C-phase knife switches and the first position indicator and the second position indicator set by the operating mechanism, improving the reliability of on-site switch position confirmation, not only avoiding the economic losses caused by unexpected shutdown of GIS equipment, but also improving the safety of GIS equipment during operation. After installation, it provides an effective judgment basis for operators to confirm the status of the knife switch on-site.

[0017] In addition to the advantages of easy disassembly and assembly and small maintenance workload, the added position indicator is targeted at the working characteristics of operation and maintenance in the nuclear power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 This is a schematic structural diagram of a three-phase position monitoring device for an isolating switch according to the present invention from a first perspective;

[0020] Figure 2 It is a structural schematic diagram of the second position indicator of the utility model.

[0021] Explanation of the numbers in the schematic diagram:

[0022] 1. Phase A gearbox; 2. Phase B gearbox; 3. Phase C gearbox; 4. Rotating connecting rod; 5. Operating mechanism; 6. First position indicator; 7. Second position indicator; 8. Worm; 9. Worm wheel; 10. Display opening and closing element; 11. Drive gear; 12. Linkage gear; 13. Hand crank cover. DETAILED DESCRIPTION

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0024] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0026] Depend on Figures 1 to 2 The utility model discloses a monitoring device for the three-phase position of an isolating switch, comprising an A-phase gearbox 1, a B-phase gearbox 2, a C-phase gearbox 3 and a rotating connecting rod 4. The A-phase gearbox 1, the B-phase gearbox 2 and the C-phase gearbox 3 are rotatably connected in sequence through the rotating connecting rod 4. An operating mechanism 5 for driving is provided on one side of the rotating connecting rod 4.

[0027] The operating mechanism 5 is provided with a first position indicator 6, and the C-phase gearbox 3 is provided with a second position indicator 7. The first position indicator 6 and the second position indicator 7 are used together to monitor the transmission of the A-phase gearbox 1, the B-phase gearbox 2 and the C-phase gearbox 3 and the opening and / or closing status of the isolation switch.

[0028] Preferably, the device is provided with three isolating switch switches, namely A-phase switch, B-phase switch and C-phase switch, and A-phase switch, B-phase switch and C-phase switch are respectively installed in A-phase gearbox 1, B-phase gearbox 2 and C-phase gearbox 3.

[0029] Specifically, the operating mechanism 5 drives the A-phase gearbox 1, the B-phase gearbox 2, and the C-phase gearbox 3 to rotate by rotating the connecting rod 4, and then the A-phase gearbox 1, the B-phase gearbox 2, and the C-phase gearbox 3 respectively drive the A-phase knife switch, the B-phase knife switch, and the C-phase knife switch to close and / or open.

[0030] In addition, the first position indicator 6 monitors the operating mechanism 5 driving the A-phase gearbox 1 to rotate, and the second position indicator 7 is used to monitor the C-phase gearbox 3 to rotate. Since the A-phase gearbox 1, the B-phase gearbox 2, and the C-phase gearbox 3 are connected in sequence through the rotating connecting rod 4, when the monitoring status of the first position indicator 6 and the second position indicator 7 is correct, that is, the A-phase gearbox 1 and the C-phase gearbox 3 are both rotating, then the B-phase gearbox 2 must also rotate.

[0031] From the first position indicator 6 at the head end, the operating mechanism 5, the A-phase gearbox 1, the B-phase gearbox 2, the C-phase gearbox 3, the rotating connecting rod 4 and the second position indicator 7 is a continuous process. If a component is separated, the states of the first position indicator 6 and the second position indicator 7 will be inconsistent.

[0032] Depend on Figure 2 It is shown that the first position indicator 6 and the second position indicator 7 respectively include a gear transmission mechanism and an opening and closing display element 10 , and the gear transmission mechanism deflects to drive the opening and closing display element 10 to display the deflected position.

[0033] The display opening and closing element 10 is provided with two deflection surfaces for respectively indicating the rotation of the A-phase gearbox 1 , the B-phase gearbox 2 and the C-phase gearbox 3 .

[0034] The gear transmission mechanism includes a worm 8 and a worm wheel 9; the worm 8 is rotatably arranged on one side of the C-phase gear box 3 and / or the operating mechanism 5, the worm wheel 9 is mounted on the worm 8, and the display opening and closing element 10 is mounted on the worm wheel 9.

[0035] Preferably, the C-phase gearbox 3 or operating mechanism 5 drives the worm 8 to rotate, and the display opening and closing element 10 rotates along with the worm wheel 9, with the two deflection surfaces being green and red. When the display opening and closing element 10 rotates to the green part, it indicates that the knife switch is in the open state; when the display opening and closing element 10 rotates to the red part, it indicates that the knife switch is in the closed state.

[0036] Specifically, the color of the opening and closing element 10 of the first position indicator 6 should be the same as the color of the opening and closing element 10 of the second position indicator 7, so as to improve the reliability of the visual inspection of the three-phase switch position.

[0037] It is also possible that the two deflection surfaces can be in the form of pointers, and the two pointers of different shapes are used to indicate whether the isolating switch is closed or open. It is also possible that the surface of the deflection surface can be equipped with lights of different colors for easy observation at night.

[0038] Depend on Figure 1 It is shown that the A-phase gearbox 1, the B-phase gearbox 2 and the C-phase gearbox 3 all include a box body, in which a driving gear 11 for driving the isolating switch to open and / or close is rotatably installed, and a linkage gear 12 is meshed with the driving gear 11, and the linkage gear 12 is connected to the rotating connecting rod 4 in cooperation with each other.

[0039] Preferably, the three driving gears 11 respectively drive the A-phase knife switch, the B-phase knife switch and the C-phase knife switch to close and / or open. Specifically, the A-phase knife switch, the B-phase knife switch and the C-phase knife switch all include a driving shaft, a moving contact, a static contact, etc. The rotation of the driving gear drives the driving shaft to move, and the driving shaft drives the moving contact to move together, and the moving contact contacts the static contact to close successfully.

[0040] The operating mechanism 5 is provided with a crank cover 13 for manual operation. Preferably, the crank cover 13 can be inserted into the operating mechanism 5 for manual operation. Electric operation is the standard working mode of the operating mechanism 5. For electric operation, the lock under the crank cover 13 must be in the "working" position, in a locked state, and the key must be removed.

[0041] The operating mechanism 5 includes a housing and a motor installed in the housing. The output end of the motor is provided with a gear transmission assembly that cooperates with the rotating connecting rod 4. The housing is also provided with an interlocking locking assembly, an auxiliary contact and an aviation plug element.

[0042] Preferably, a motor or an electric motor is used as a driving component. In this device, a motor is used to drive the rotating connecting rod 4, which in turn drives the driving gear 11 and the linkage gear 12. The gear transmission assembly includes a worm gear and a worm. The motor drives the worm gear to rotate, the worm gear drives the worm gear to rotate, and the worm gear drives the rotating connecting rod 4 to rotate.

[0043] Depend on Figure 1 Provided, the crank handle cover 13 and the gear transmission assembly are mutually connected. Preferably, the crank handle cover 13 is connected with the gear transmission assembly, and then the crank handle cover 13 drives the gear transmission assembly to rotate.

[0044] Beneficial effects obtained by the A-phase gearbox 1, the B-phase gearbox 2, the C-phase gearbox 3, the rotating connecting rod 4, the first position indicator 6 and / or the second position indicator 7: The utility model adds the first position indicator 6 and the second position indicator 7 to monitor the linkage of the rotating connecting rod 4 between the A-phase, B-phase and C-phase, and the next operation can only be performed when the signals of the first position indicator 6 and the second position indicator 7 are consistent, thereby avoiding the problem of inconsistency between the opening and closing positions of the A-phase, B-phase and C-phase knife switches and the first position indicator 6 and the second position indicator 7 set by the operating mechanism, improving the reliability of on-site switch position confirmation, not only avoiding the economic losses caused by unexpected shutdown of GIS equipment, but also improving the safety of GIS equipment during operation. After installation, it provides an effective judgment basis for the operator to confirm the status of the knife switch on-site.

[0045] In addition to the advantages of easy disassembly and assembly and small maintenance workload, the added position indicator is targeted at the working characteristics of operation and maintenance in the nuclear power industry.

[0046] When the present invention is in use: the operating mechanism 5 drives the rotating connecting rod 4 to rotate, the rotating connecting rod 4 drives the A-phase gearbox 1, the B-phase gearbox 2 and the C-phase gearbox 3 to rotate, and the A-phase gearbox 1, the B-phase gearbox 2 and the C-phase gearbox 3 drive the A-phase knife switch, the B-phase knife switch and the C-phase knife switch to close and / or open. Since the first position indicator 6 at the head end, the operating mechanism 5, the A-phase gearbox 1, the B-phase gearbox 2, the C-phase gearbox 3 and the rotating connecting rod 4 and the second position indicator 7 are a coherent process, if a component is separated, the first position indicator 6 and the second position indicator 7 will display the same color, which means that the transmission is normal and the closing and opening operations can be performed, which effectively determines the problem of consistent positions of the three-phase disconnector and improves safety.

[0047] If the colors displayed by the first position indicator 6 and the second position indicator 7 are inconsistent, it means that the transmission is abnormal and the opening and closing operations cannot be performed to avoid triggering serious consequences of power failure.

[0048] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A monitoring device for the three-phase position of an isolating switch, characterized in that: The invention comprises an A-phase gearbox (1), a B-phase gearbox (2), a C-phase gearbox (3) and a rotating connecting rod (4), wherein the A-phase gearbox (1), the B-phase gearbox (2) and the C-phase gearbox (3) are rotatably connected in sequence via the rotating connecting rod (4), and an operating mechanism (5) for driving is provided on one side of the rotating connecting rod (4); The operating mechanism (5) is provided with a first position indicator (6), and the C-phase gearbox (3) is provided with a second position indicator (7). The first position indicator (6) and the second position indicator (7) are used together to monitor the transmission of the A-phase gearbox (1), the B-phase gearbox (2), and the C-phase gearbox (3), and the opening state and / or closing state of the isolating switch.

2. The monitoring device for the three-phase position of an isolating switch according to claim 1, characterized in that: The first position indicator (6) and the second position indicator (7) each comprise a gear transmission mechanism and a display opening and closing element (10), and the gear transmission mechanism deflects to drive the display opening and closing element (10) to display the deflected position.

3. The monitoring device for the three-phase position of an isolating switch according to claim 2, characterized in that: The display opening and closing element (10) is provided with two deflection surfaces for respectively indicating the rotation of the A-phase gearbox (1), the B-phase gearbox (2) and the C-phase gearbox (3).

4. The monitoring device for the three-phase position of an isolating switch according to claim 2, characterized in that: The gear transmission mechanism includes a worm (8) and a worm wheel (9); The worm (8) is rotatably arranged on one side of the C-phase gearbox (3) and / or the operating mechanism (5), the worm wheel (9) is mounted on the worm (8), and the display opening and closing element (10) is mounted on the worm wheel (9).

5. The monitoring device for the three-phase position of an isolating switch according to claim 1, characterized in that: The A-phase gearbox (1), the B-phase gearbox (2) and the C-phase gearbox (3) all comprise a housing, wherein a driving gear (11) for driving the isolating switch to open and / or close is rotatably mounted in the housing, a linkage gear (12) is meshed with the driving gear (11), and the linkage gear (12) is cooperatively connected to the rotating connecting rod (4).

6. The device for monitoring the three-phase position of an isolating switch according to claim 1, characterized in that: The operating mechanism (5) is provided with a hand crank cover (13) for manual operation.

7. The device for monitoring the three-phase position of an isolating switch according to claim 6, characterized in that: The operating mechanism (5) comprises a housing and a motor installed in the housing. The output end of the motor is provided with a gear transmission assembly that matches the rotating connecting rod (4). The housing is also provided with a locking assembly, an auxiliary contact and an aviation plug element.

8. The device for monitoring the three-phase position of an isolating switch according to claim 7, characterized in that: The hand crank cover (13) and the gear transmission assembly are cooperatively connected.

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