Three-position switch of GIS equipment

Abstract

The invention relates to the technical field of GIS (Gas Insulated Switchgear), in particular to a three-position switch of GIS equipment. The grounding contact seat, the moving contact seat and the static contact seat are located in a shell, a moving contact is arranged in the moving contact seat, and the grounding contact seat, the moving contact seat and the static contact seat are coaxial; the moving contact comprises a main body section and adjusting sections located at the two ends of the main body section, the adjusting sections and the main body section are in sliding connection in an elastic mode, and the sliding direction of the adjusting sections is consistent with the moving direction of the main body section; in the three-position switch of the GIS equipment, the moving contact is arranged into the main body section and the adjusting section and is matched with the two gear driving mechanisms, and the main body section and the adjusting section are respectively controlled through the two gear driving mechanisms, so that the length of the moving contact in the moving contact seat after the moving contact extends out is increased; the gravity distribution of the moving contact is changed by adjusting the length, so that most of the weight of the moving contact is located in the moving contact seat.

Description

Technical Field

[0001] This invention relates to the field of GIS (Gas Insulated Metal Enclosed Switchgear) technology, and more specifically, to a three-position switch for GIS equipment. Background Technology

[0002] GIS equipment integrates electrical devices such as circuit breakers, disconnectors, and grounding switches, offering advantages such as compact structure, small footprint, high reliability, good seismic performance, low noise, and minimal daily maintenance. It is widely used in power systems. Internally, GIS includes a stationary contact base, a grounding contact base, and a moving contact base. The moving contact base is located between the stationary and grounding contact bases. Under the action of a drive mechanism, the moving contact within the moving contact base reciprocates between the stationary and grounding contact bases.

[0003] In some GIS internal structures, the moving contact seat needs to maintain a relatively long distance from the stationary contact seat and the grounding contact seat; that is, the moving contact seat needs to be far apart from the stationary and grounding contact seats. This requires the moving contact to extend a considerable length beyond the moving contact seat to make contact with the stationary / grounding contact seat. However, extending the moving contact beyond this length presents the following problems: When the moving contact extends a considerable distance, its front section will experience a significant downward tilting force under gravity. This generates substantial friction between the moving contact and the end of the moving contact seat, leading to easy wear at the end of the moving contact seat. Furthermore, a gap often exists between the moving contact and its seat. The downward tilting of the moving contact's front section can cause misalignment between the moving contact and both the grounding and stationary contact seats. After repeated operations, this can result in severe friction between the moving and stationary contacts, accelerating their wear.

[0004] Therefore, how to mitigate the downward tilting phenomenon at the front of the moving contact is the current problem. Summary of the Invention

[0005] The purpose of this invention is to provide a three-position switch for GIS equipment, which solves the problem mentioned in the background art by setting the moving contact as an extendable structure and using two sets of gear drive mechanisms to control the extendable structure, namely, that the front part of the moving contact will have a large downward tilting force.

[0006] To achieve the above objectives, the three-position switch of the GIS equipment includes a grounding contact seat, a moving contact seat, and a stationary contact seat located within the housing. A moving contact is provided inside the moving contact seat, and the grounding contact seat, the moving contact seat, and the stationary contact seat are coaxial. The moving contact includes a main body segment and adjustment segments located at both ends of the main body segment. The adjustment segments are slidably connected to the main body segment in an elastic manner, and the sliding direction of the adjustment segments is consistent with the movement direction of the main body segment. It also includes a gear drive mechanism for driving the movement of the main body section, wherein at least two sets of the gear drive mechanism are arranged along the movement direction of the main body section; among the two sets of gear drive mechanisms, one set of gear drive mechanisms away from the movement direction of the main body section is used to limit the movement of the corresponding adjustment section and increase the length of the moving contact in the moving contact seat after movement; The restricted adjustment section is located at the end of the main section's direction of movement.

[0007] In the above technical solution, when the adjusting section moves above the gear drive mechanism, the gear drive mechanism stops rotating so that the adjusting section stays inside the moving contact seat. At this time, the length of the moving contact is increased, and the increased part is located inside the contact seat. In this way, the gravity in front of the moving contact is reduced.

[0008] Based on this, the two sets of gear drive mechanisms each include a first gear and a second gear rotatably disposed in the moving contact seat; the first gear and the second gear are both coaxially connected to a drive shaft, and the end of the drive shaft is connected to a drive member, which drives the first gear and the second gear to rotate through the drive shaft; Both the main body section and the bottom of the adjusting section of the moving contact are equipped with racks; the tops of the first gear and the second gear are inserted into the tubular structure of the moving contact seat and mesh with the racks.

[0009] Based on this, the main body of the moving contact is a rod, and the adjusting section includes a first movable end and a second movable end; the first movable end is located at one end of the rod, and the second movable end is located at the other end of the rod; It also includes a sliding structure, through which the first movable end and the second movable end are elastically slidably connected to the rod body. Specifically, the sliding structure includes a sliding cavity disposed inside the rod body and a first sliding rod and a second sliding rod that slide into the sliding cavity; An elastic connector, which is a spring, is fixedly installed inside the sliding cavity. The first slide bar is fixedly connected to the first movable end, and the second slide bar is fixedly connected to the second movable end.

[0010] There are two ways to set up the sliding cavity: Method 1: Two sliding cavities are provided, one end of which passes through one end of the rod body, and the other end of which passes through the other end of the rod body; the elastic connecting parts in the two sliding cavities are fixedly connected to the first sliding rod and the second sliding rod, respectively.

[0011] Method 2: The sliding cavity extends through both ends of the rod, and one end of the elastic connector is fixedly connected to the first sliding rod, and the other end is fixedly connected to the second sliding rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the three-position switch of this GIS equipment, the moving contact is set as a main section and an adjustment section, and is coordinated with two sets of gear drive mechanisms. The main section and the adjustment section are controlled separately by the two sets of gear drive mechanisms, which increases the length of the moving contact in the moving contact seat after it extends. By adjusting the length, the weight distribution of the moving contact is changed, so that most of the weight of the moving contact is in the moving contact seat, thereby reducing the tilting phenomenon of the moving contact.

[0013] 2. In the three-position switch of this GIS equipment, when the distance between the moving contact seat and the grounding contact seat and the stationary contact seat is far, the two sets of gear drive mechanisms set in this invention can drive the moving contact to extend a longer distance, so as to realize the closing or opening operation of the moving contact at a longer distance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the moving contact seat of the present invention; Figure 3 This is a schematic diagram of the sliding cavity structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the structure of the first slide bar of the present invention; Figure 5 This is a schematic diagram of the working state of the main contact of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the working state of the first active end of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the sliding cavity structure of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the working state of the main contact of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the working state of the first active end of the present invention. Figure 2 .

[0015] The meanings of the labels in the diagram are as follows: 100. Housing; 101. Grounding contact seat; 102. Stationary contact seat; 110. Moving contact seat; 111. First gear; 112. Second gear; 113. Drive shaft; 120. Rod body; 121. First movable end; 122. Second movable end; 123. Rack; 130. Sliding cavity; 131. First slide rod; 132. Second slide rod; 133. Elastic connector. Detailed Implementation

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] like Figure 6 As shown, the current problem with the extended moving contact is that when the middle part A of the rod 120 extends out of the moving contact seat 110, that is, the extended length L1 of the rod 120 is greater than the length L2 of the rod 120 within the moving contact seat 110, the weight of the end of the rod 120 near the second movable end 122 will be greater than the weight of the end of the rod 120 near the first movable end 121. The end of the rod 120 near the second movable end 122 will receive a larger downward tilting force. On the one hand, this will exert a large frictional force on position B, and on the other hand, it will cause the moving contact to be misaligned with the grounding contact seat 101 and the stationary contact seat 102.

[0020] Therefore, to address the problem of significant downward tilting force at the front of the moving contact, this invention provides a three-position switch for GIS equipment to reduce the tilting phenomenon of the moving contact. For example... Figure 1 As shown, the three-position switch includes a moving contact base 110. Above the moving contact base 110 is a tubular structure that accommodates the moving contact. The moving contact is slidably disposed within the tubular structure and is driven by a gear drive mechanism to perform reciprocating linear motion within the tubular structure. Furthermore, a grounding contact base 101 and a stationary contact base 102 within the housing 100 are respectively located at the ends of the moving contact base 110. Figure 1Taking the state and direction as an example, the grounding contact seat 101 is located at the left end of the moving contact seat 110, and the stationary contact seat 102 is located at the right end of the moving contact seat 110. Simultaneously, the grounding contact seat 101, moving contact seat 110, and stationary contact seat 102 are coaxial. This design structurally achieves logical interlocking of isolation and grounding. When the stationary contact seat 102 is in the closed state, the grounding contact seat 101 must be in the open state. Similarly, when the grounding contact seat 101 is in the closed state, the stationary contact seat 102 must be in the open state. To achieve the switching of the moving contact from the stationary contact seat 102 closed to the grounding contact seat 101 closed, the moving contact must first move from the stationary contact seat 102 position to the moving contact seat 110 to open, and then move to the grounding contact seat 101 position.

[0021] In the above, the moving contact includes a main body segment and adjusting segments located at both ends of the main body segment. The adjusting segments are slidably connected to the main body segment in an elastic manner, and the sliding direction of the adjusting segments is consistent with the movement direction of the main body segment. At least two sets of gear drive mechanisms are provided along the movement direction of the main body section; both sets of gear drive mechanisms are used to drive the movement of the main body section. Of the two sets of gear drive mechanisms, one set, located away from the movement direction of the main body section, is used to restrict the movement of the corresponding adjusting section, thereby increasing the length of the moving contact within the moving contact seat 110 after movement. The restricted adjusting section is located at the end of the movement direction of the main body section. Thus, because the length of the rod 120 within the moving contact seat 110 is increased, the front section of the moving contact (the part extending out of the moving contact seat 110) has difficulty overcoming the weight of the rear section, thereby reducing the downward tilting force of the front section of the moving contact.

[0022] Furthermore, by tilting the grounding contact seat 101, the moving contact seat 110, and the stationary contact seat 102, the present invention helps to reduce the tilting state of the moving contact.

[0023] Figure 2 The specific structure of the two gear drive mechanisms is shown. As shown in the figure, each gear drive mechanism includes a first gear 111 and a second gear 112 rotatably mounted within the moving contact seat 110, with the first gear 111 and the second gear 112 positioned along the direction of movement of the main body segment. Next, racks 123 are provided at the bottom of both the main body segment and the adjusting segment of the moving contact. The tops of the first gear 111 and the second gear 112 penetrate into the tubular structure of the moving contact seat 110 and mesh with the racks 123. Thus, when the second gear 112 rotates synchronously, the rack 123 converts the rotational motion of the first gear 111 and the second gear 112 into linear motion driving the main body segment of the moving contact. Simultaneously, the adjusting segment of the moving contact moves synchronously as the main body segment moves. Furthermore, both the first gear 111 and the second gear 112 are coaxially connected to a drive shaft 113, the end of which is connected to a motor or manually driven.

[0024] Specifically, such as Figure 2 As shown, the main body of the moving contact is a rod 120, and the adjusting section includes a first movable end 121 and a second movable end 122. The rod 120, the first movable end 121, and the second movable end 122 are all cylindrical structures. Next, using... Figure 2 Based on the directions shown in the diagram, the first movable end 121 is located at the right end of the rod 120, and the second movable end 122 is located at the left end of the rod 120. The end shapes of the second movable end 122 and the first movable end 121 correspond to the grounding contact seat 101 and the stationary contact seat 102, respectively. With this design, for example, when the rod 120 moves the second movable end 122 towards the grounding contact seat 101, the second movable end 122 can enter the grounding contact seat 101, thus connecting the grounding contact seat 101 and the rod 120.

[0025] Based on this, the first movable end 121 and the second movable end 122 are elastically slidably connected to the rod body 120 through a sliding structure. The sliding structure includes a sliding cavity 130 disposed inside the rod body 120 and a first sliding rod 131 and a second sliding rod 132 that slide into the sliding cavity 130. An elastic connector 133 is fixedly disposed within the sliding cavity 130; the elastic connector 133 can be a spring, a sheet, or other structure. The first sliding rod 131 is fixedly connected to the first movable end 121, and the second sliding rod 132 is fixedly connected to the second movable end 122. Furthermore, there are various ways to configure the sliding cavity 130; this invention selects two, which are detailed in the following two embodiments.

[0026] Example 1, as Figure 3 As shown, two sliding cavities 130 are provided. The elastic connecting members 133 within the two sliding cavities 130 are respectively fixedly connected to the first slide rod 131 and the second slide rod 132. Furthermore, the two sliding cavities 130 can be arranged in a vertical, horizontal, or other manner. Figure 3 Taking the illustrated state as an example, the left end of the upper sliding cavity 130 extends to the left end of the rod 120, and the right end penetrates the right end of the rod 120; the left end of the lower sliding cavity 130 penetrates the left end of the rod 120, and the right end extends to the right end of the rod 120. In this embodiment, for example, when the first movable end 121 is restricted by the gear drive mechanism, the continued movement of the rod 120 will cause the elastic connector 133 to stretch, thereby causing the first sliding rod 131 to extend out of the sliding cavity 130, which increases the overall length of the moving contact.

[0027] Furthermore, in this embodiment, the lengths of the first slide bar 131 and the second slide bar 132 are both adjusted to be greater than half the length of the rod body 120. Through this adjustment, the first slide bar 131 and the second slide bar 132... Figure 3In the initial state shown, the ends of both the first slide rod 131 and the second slide rod 132 can extend beyond the middle portion of the rod body 120. Thus, for example, when the first slide rod 131 extends out of the sliding cavity 130, the end of the first slide rod 131 that extends beyond the middle portion of the rod body 120 will move to the end of the rod body 120 located within the moving contact seat 110, thereby increasing the weight of the end of the rod body 120 located within the moving contact seat 110.

[0028] To mitigate the tilting phenomenon of the rod 120, the working principle of Embodiment 1 of the present invention will be described in detail below: Reference position of moving contact in open state Figure 5 The upper part of the text. Next, taking the movement of the moving contact to the left as an example, the process is detailed: firstly, the first gear 111 and the second gear 112 are driven to rotate counterclockwise synchronously. At this time, the first gear 111 and the second gear 112 drive the moving contact to move to the left. Then, refer to... Figure 5 In the lower half of the structure, when the first movable end 121 moves with the rod 120 to the top of the second gear 112, the drive on the second gear 112 stops, preventing the second gear 112 from rotating. At this time, the second gear 112 restricts the movement of the first movable end 121 through the rack 123, while the first gear 111 continues to drive the rod 120 to move to the left. The final state after the movement is as follows. Figure 6 As shown, it can be seen that after the first movable end 121 is separated from the rod body 120, the length of the movable contact within the movable contact seat 110 changes from the previous length L2 to length L2 + length L3.

[0029] Therefore, it can be seen that the portion of the moving contact located within the moving contact seat 110 has been lengthened, thus altering the gravity distribution of the moving contact. When the moving contact is in... Figure 6 When in the middle state, most of the weight of the moving contact is within the moving contact seat 110, thereby reducing the tilting phenomenon of the moving contact.

[0030] Example 2, as Figure 7 As shown, the sliding cavity 130 passes through both ends of the rod body 120, and one end of the elastic connector 133 is fixedly connected to the first sliding rod 131, and the other end is fixedly connected to the second sliding rod 132. The working principle of Embodiment 2 can be referenced based on Embodiment 1. Figure 8 and Figure 9 The working principle of this embodiment is basically the same as that of Embodiment 1, and will not be described in detail here.

[0031] It should be noted that a partition can also be provided in the middle of the sliding cavity 130 to divide the sliding cavity 130 into left and right parts. In this case, two elastic connectors 133 are provided, namely, one elastic connector 133 is connected to the first slide rod 131 and the other elastic connector 133 is connected to the second slide rod 132.

[0032] Furthermore, to prevent rotation of the first movable end 121 and the second movable end 122, the first slide rod 131 and the second slide rod 132 need to be designed as non-circular structures. For example, refer to... Figure 4 A protrusion is provided on the outer ring of the first slide rod 131 and the second slide rod 132, and a groove is provided on the second slide rod 132 corresponding to the protrusion. The groove only allows the first slide rod 131 and the second slide rod 132 to slide axially, thereby preventing the first movable end 121 and the second movable end 122 from rotating.

[0033] In summary, this invention sets the moving contact as a main body section and an adjustment section, and coordinates it with two sets of gear drive mechanisms. The main body section and the adjustment section are controlled separately by the two sets of gear drive mechanisms, which increases the length of the moving contact within the moving contact seat 110 after it extends. By adjusting the length, the weight distribution of the moving contact is changed, so that most of the weight of the moving contact is within the moving contact seat 110, thereby reducing the tilting phenomenon of the moving contact.

[0034] In addition, when the distance between the moving contact seat 110 and the grounding contact seat 101 and the stationary contact seat 102 is far, the two sets of gear drive mechanisms provided in this invention can drive the moving contact to extend a longer distance, which can realize the closing or opening operation of the moving contact at a longer distance.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-position switch for a GIS device, comprising a grounding contact seat (101), a moving contact seat (110), and a stationary contact seat (102) located within a housing (100), wherein a moving contact is disposed within the moving contact seat (110), and the grounding contact seat (101), the moving contact seat (110), and the stationary contact seat (102) are coaxial; characterized in that: The moving contact includes a main body segment and adjustment segments located at both ends of the main body segment. The adjustment segments are slidably connected to the main body segment in an elastic manner, and the sliding direction of the adjustment segments is consistent with the movement direction of the main body segment. It also includes a gear drive mechanism for driving the movement of the main body section, wherein at least two sets of the gear drive mechanism are provided along the movement direction of the main body section; among the two sets of gear drive mechanisms, one set of gear drive mechanisms away from the movement direction of the main body section is used to limit the movement of the corresponding adjustment section and increase the length of the moving contact in the moving contact seat (110) after movement; The restricted adjustment section is located at the end of the main section's direction of movement.

2. The three-position switch of the GIS equipment according to claim 1, characterized in that: The grounding contact seat (101), moving contact seat (110) and stationary contact seat (102) are all inclined.

3. The three-position switch for the GIS equipment according to claim 1, characterized in that: The two sets of gear drive mechanisms each include a first gear (111) and a second gear (112) rotatably disposed in the moving contact seat (110); the first gear (111) and the second gear (112) are both coaxially connected to a drive shaft (113), and the end of the drive shaft (113) is connected to a drive component; The bottom of both the main body section and the adjustment section of the moving contact are provided with racks (123); the tops of the first gear (111) and the second gear (112) are inserted into the tubular structure of the moving contact seat (110) and mesh with the racks (123).

4. The three-position switch of the GIS equipment according to claim 3, characterized in that: The first gear (111) and the second gear (112) are arranged along the movement direction of the main body segment.

5. The three-position switch of the GIS equipment according to claim 1, characterized in that: The main body of the moving contact is a rod (120), and the adjustment section includes a first movable end (121) and a second movable end (122); the first movable end (121) is located at one end of the rod (120), and the second movable end (122) is located at the other end of the rod (120); It also includes a sliding structure, wherein the first movable end (121) and the second movable end (122) are elastically slidably connected to the rod (120) through the sliding structure.

6. The three-position switch of the GIS equipment according to claim 5, characterized in that: The sliding structure includes a sliding cavity (130) disposed inside the rod (120) and a first slide rod (131) and a second slide rod (132) that slide into the sliding cavity (130). An elastic connector (133) is fixedly installed inside the sliding cavity (130); The first slide bar (131) is fixedly connected to the first movable end (121), and the second slide bar (132) is fixedly connected to the second movable end (122).

7. The three-position switch of the GIS equipment according to claim 6, characterized in that: The elastic connector (133) is a spring.

8. The three-position switch of the GIS equipment according to claim 6, characterized in that: The sliding cavity (130) is provided in two parts, one end of which passes through one end of the rod (120), and the other end of which passes through the other end of the rod (120). The elastic connectors (133) in the two sliding cavities (130) are fixedly connected to the first slide rod (131) and the second slide rod (132), respectively.

9. The three-position switch of the GIS equipment according to claim 8, characterized in that: The lengths of the first slide bar (131) and the second slide bar (132) are both greater than half the length of the rod body (120).

10. The three-position switch of the GIS equipment according to claim 6, characterized in that: The sliding cavity (130) passes through both ends of the rod (120), and one end of the elastic connector (133) is fixedly connected to the first slide rod (131) and the other end is fixedly connected to the second slide rod (132).

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