A three-position switch of GIS equipment

Abstract

The present application relates to GIS (gas insulated metal enclosed switch) technical field, specifically, it is a kind of three-position switch of GIS equipment.It includes ground contact seat, movable contact seat and static contact seat in shell, movable contact seat is provided with movable contact, ground contact seat, movable contact seat and static contact seat are coaxial;The movable contact includes main body section and adjusting section at both ends of main body section, adjusting section and main body section are slidably connected in elastic mode, the sliding direction of adjusting section is consistent with the movement direction of main body section;The three-position switch of the GIS equipment, the movable contact is set as main body section and adjusting section, and is matched with two groups of gear drive mechanism, the main body section and adjusting section are controlled respectively by two groups of gear drive mechanism, increase the length of movable contact in movable contact seat after stretching, change movable contact gravity distribution by adjusting length, so that most of the weight of movable contact is in movable contact seat.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of GIS (gas insulated metal-enclosed switch), in particular to a three-position switch of GIS equipment. BACKGROUND

[0002] The GIS equipment combines circuit breakers, disconnectors, grounding switches and other electrical equipment together, has the advantages of compact structure, small space occupation, high reliability, good anti-seismic performance, low noise, small daily maintenance workload and the like, and is widely used in power systems. The GIS internally comprises a static contact seat, a grounding contact seat and a moving contact seat, wherein the moving contact seat is located between the static contact seat and the grounding contact seat, and under the action of a driving mechanism, a moving contact located in the moving contact seat moves back and forth between the static contact seat and the grounding contact seat.

[0003] In some internal structures of GIS, the moving contact seat needs to maintain a relatively long distance with the static contact seat and the grounding contact seat, i.e. the distance between the moving contact seat and the static contact seat and the grounding contact seat is relatively long. In this way, the moving contact needs to extend a relatively long length in the moving contact seat to contact the static contact seat / grounding contact seat. However, after the moving contact extends a relatively long length, the following problems will be faced:

[0004] After the moving contact extends a relatively long length, under the action of gravity, a front section of the moving contact will appear a relatively large downward tilting force. At this time, a relatively large friction force will be generated between the front section of the moving contact and the end of the moving contact seat, which will cause the end of the moving contact seat to be easily worn. Moreover, there is often a gap between the moving contact and the moving contact seat, and the downward tilting of the front section of the moving contact will make the moving contact and the grounding contact seat and the static contact seat eccentric, and the moving and static contacts are easily seriously rubbed after multiple operations, which will accelerate the wear between the moving and static contacts.

[0005] Therefore, how to slow down the downward tilting phenomenon of the front section of the moving contact is a problem currently faced. SUMMARY

[0006] The present application aims to provide a three-position switch of GIS equipment, which sets the moving contact as an extendable structure and controls the extendable structure through two sets of gear driving mechanisms, so as to solve the problem that the front section of the moving contact will appear a relatively large downward tilting force as mentioned in the background.

[0007] To achieve the above-mentioned purpose, the three-position switch of GIS equipment comprises a grounding contact seat, a moving contact seat and a static contact seat located in a shell, the moving contact seat is provided with a moving contact, and the grounding contact seat, the moving contact seat and the static contact seat are coaxial;

[0008] The moving contact comprises a main body section and adjusting sections located at both ends of the main body section, the adjusting sections and the main body section are connected in an elastic sliding manner, and the sliding direction of the adjusting sections is consistent with the movement direction of the main body section.

[0009] The gear driving mechanism for driving the movement of the main body section is arranged in at least two groups along the movement direction of the main body section; one of the two groups of gear driving mechanisms is arranged away from the movement direction of the main body section and is used to limit the movement of the corresponding adjusting section, thereby increasing the length of the movable contact head in the movable contact head seat after movement.

[0010] The adjusting section to be limited is located at the end of the movement direction of the main body section.

[0011] In the above technical solution, when the adjusting section moves above the gear driving mechanism, the gear driving mechanism stops rotating to make the adjusting section stay in the movable contact head seat, at this time, the length of the movable contact head is increased, and the increased part is located in the contact head seat. In this way, the gravity in front of the movable contact head is reduced.

[0012] On this basis, the two groups of gear driving mechanisms respectively include a first gear and a second gear rotatably arranged in the movable contact head seat; the first gear and the second gear are coaxially connected with a driving shaft, the end of the driving shaft is connected with a driving member, and the driving member drives the first gear and the second gear to rotate through the driving shaft.

[0013] The main body section of the movable contact head and the bottom of the adjusting section are both provided with a rack; the top of the first gear and the second gear penetrates into the tubular structure of the movable contact head seat and is engaged with the rack.

[0014] On this basis, the main body section of the movable contact head is a rod body, 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 body, and the second movable end is located at the other end of the rod body.

[0015] Further comprising a sliding structure, the first movable end and the second movable end are elastically and slidably connected with the rod body through the sliding structure. Specifically, the sliding structure includes a sliding cavity arranged in the rod body and a first sliding rod and a second sliding rod slidingly extending into the sliding cavity.

[0016] The sliding cavity is fixedly provided with an elastic connecting member, and the elastic connecting member is a spring.

[0017] The first sliding rod is fixedly connected with the first movable end, and the second sliding rod is fixedly connected with the second movable end.

[0018] There are two ways to arrange the sliding cavity as follows:

[0019] The first way is that the sliding cavity is provided with two sliding cavities, one end of one of the two sliding cavities penetrates through one end of the rod body, and one end of the other sliding cavity penetrates through the other end of the rod body; the elastic connecting members in the two sliding cavities are respectively fixedly connected with the first sliding rod and the second sliding rod.

[0020] The second mode is that the sliding cavity penetrates through both ends of the rod body, one end of the elastic connecting piece is fixedly connected with the first sliding rod, and the other end is fixedly connected with the second sliding rod.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1. In the three-position switch of the GIS device, the movable contact is provided with a main section and an adjusting section, and two sets of gear driving mechanisms are arranged in cooperation, the main section and the adjusting section are controlled respectively by the two sets of gear driving mechanisms, the length of the movable contact in the movable contact seat after being extended is increased, the gravity distribution of the movable contact is changed by adjusting the length, most of the weight of the movable contact is in the movable contact seat, and the inclination of the movable contact is reduced.

[0023] 2. In the three-position switch of the GIS device, when the distance between the movable contact seat and the ground contact seat and the static contact seat is far, the two sets of gear driving mechanisms can drive the movable contact to extend for a long distance, and the closing or opening operation of the movable contact in a long distance can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0025] Figure 2 It is a schematic diagram of the structure of the movable contact seat of the present application;

[0026] Figure 3 It is a schematic diagram of the structure of the sliding cavity of the present application Figure 1 ;

[0027] Figure 4 It is a schematic diagram of the structure of the first sliding rod of the present application;

[0028] Figure 5 It is a working state schematic diagram of the main contact of the present application Figure 1 ;

[0029] Figure 6 It is a working state schematic diagram of the first movable end of the present application Figure 1 ;

[0030] Figure 7 It is a schematic diagram of the structure of the sliding cavity of the present application Figure 2 ;

[0031] Figure 8 It is a working state schematic diagram of the main contact of the present application Figure 2 ;

[0032] Figure 9 It is a working state schematic diagram of the first movable end of the present application Figure 2 .

[0033] The meanings of the various reference numbers in the drawings are as follows:

[0034] 100, housing; 101, ground contact seat; 102, static contact seat; 110, movable 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 sliding rod; 132, second sliding rod; 133, elastic connecting piece. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0038] As Figure 6 shown, the problem of the current movable contact after elongation is that when the middle part A of the rod body 120 extends out of the movable contact seat 110, that is, the length L1 of the rod body 120 extending out is greater than the length L2 of the rod body 120 located in the movable contact seat 110. At this time, the weight of the rod body 120 close to the second movable end 122 will be greater than the weight of the rod body 120 close to the first movable end 121, and the end of the rod body 120 close to the second movable end 122 will receive a larger downward tilting force, which will exert a larger friction force on position B on the one hand, and will make the movable contact eccentric with the ground contact seat 101 and the static contact seat 102 on the other hand.

[0039] To this end, in view of the problem that a large downward tilting force occurs on the front section of the moving contact, the application provides a three-position switch of GIS equipment to reduce the tilting phenomenon of the moving contact. Figure 1 As shown in the figure, the three-position switch comprises a moving contact seat 110, the upper part of the moving contact seat 110 is a tubular structure for accommodating the moving contact, the moving contact is slidingly arranged in the tubular structure, and the moving contact is driven to move linearly back and forth in the tubular structure by a gear driving mechanism. In addition, the ground contact seat 101 and the static contact seat 102 in the shell 100 are respectively located at the ends of the moving contact seat 110, so as to Figure 1 For example, the state and direction in the figure, the ground contact seat 101 is located at the left end of the moving contact seat 110, and the static contact seat 102 is located at the right end of the moving contact seat 110. At the same time, the ground contact seat 101, the moving contact seat 110 and the static contact seat 102 are coaxial. This design realizes the logical interlocking of isolation and grounding in structure, when the static contact seat 102 is in the closed state, the ground contact seat 101 must be in the open state, and vice versa. If you want to realize the conversion of the moving contact from the static contact seat 102 to the ground contact seat 101, you must first make the moving contact move from the static contact seat 102 to the moving contact seat 110 for opening, and then move to the ground contact seat 101 position.

[0040] In the above, the moving contact comprises a main section and adjusting sections located at both ends of the main section, the adjusting sections are slidingly connected with the main section in an elastic manner, and the sliding direction of the adjusting sections is consistent with the movement direction of the main section;

[0041] The gear driving mechanism is provided with at least two groups along the movement direction of the main section; the two groups of gear driving mechanisms are used for driving the main section to move. In the two groups of gear driving mechanisms, one group of gear driving mechanisms far away from the moving direction of the main section is used to limit the movement of the corresponding adjusting section, so as to increase the length of the moving contact in the moving contact seat 110 after moving. The adjusting section to be limited is at the end of the movement direction of the main section. In this way, the length of the rod body 120 in the moving contact seat 110 is increased, and at this time the front section of the moving contact (the part extending out of the moving contact seat 110) is difficult to overcome the weight of the rear section, so as to reduce the downward tilting force of the front section of the moving contact.

[0042] Moreover, the application tilts the ground contact seat 101, the moving contact seat 110 and the static contact seat 102, which is conducive to reducing the tilting state of the moving contact.

[0043] Figure 2The specific structure of the two sets of gear driving mechanisms is shown. As shown in the figure, the two sets of gear driving mechanisms respectively include a first gear 111 and a second gear 112 rotatably arranged in the movable contact seat 110, and the first gear 111 and the second gear 112 are arranged along the movement direction of the main body section. Then, the bottom of the main body section and the adjusting section of the movable contact are provided with a rack 123. The top of the first gear 111 and the second gear 112 are respectively inserted into the tubular structure of the movable contact seat 110 and engaged with the rack 123. In this way, when the second gear 112 and the second gear 112 rotate synchronously, the rack 123 changes the rotary motion of the first gear 111 and the second gear 112 into linear motion for driving the movement of the main body section of the movable contact, and when the main body section of the movable contact moves, the adjusting section of the movable contact moves synchronously. In addition, the first gear 111 and the second gear 112 are coaxially connected with a driving shaft 113, and the end of the driving shaft 113 is connected with a motor or driven by manpower.

[0044] Specifically, as shown in Figure 2 , the main body section of the movable contact is a rod body 120, and the adjusting section includes a first movable end 121 and a second movable end 122, and the rod body 120, the first movable end 121 and the second movable end 122 are all cylindrical structures. Then, as shown in the direction in Figure 2 , the first movable end 121 is located at the right end of the rod body 120, and the second movable end 122 is located at the left end of the rod body 120, and the end shapes of the second movable end 122 and the first movable end 121 correspond to the ground contact seat 101 and the static contact seat 102 respectively. Through this design, for example, when the rod body 120 drives the second movable end 122 to move to the ground contact seat 101, the second movable end 122 can enter the ground contact seat 101 to realize the connection between the ground contact seat 101 and the rod body 120.

[0045] On this basis, the first movable end 121 and the second movable end 122 are elastically and slidably connected with the rod body 120 through the sliding structure. The sliding structure includes a sliding cavity 130 arranged inside the rod body 120 and a first sliding rod 131 and a second sliding rod 132 slidingly extending into the sliding cavity 130. Among them, the sliding cavity 130 is fixedly provided with an elastic connecting piece 133, which can be a spring, a spring piece or other structure. The first sliding rod 131 is fixedly connected with the first movable end 121, and the second sliding rod 132 is fixedly connected with the second movable end 122. In addition, there are many ways to arrange the sliding cavity 130, and the present application selects two kinds, which are described in detail through the following two embodiments.

[0046] Embodiment 1, as shown in Figure 3As 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.

[0047] 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 3 In 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.

[0048] 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:

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application 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; Among them, the restricted adjustment section is located at the end of the main section's direction of movement; 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); 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; 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).

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 first gear (111) and the second gear (112) are arranged along the movement direction of the main body segment.

4. The three-position switch of the GIS equipment according to claim 1, characterized in that: The elastic connector (133) is a spring.

5. The three-position switch of the GIS equipment according to claim 1, 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.

6. The three-position switch of the GIS equipment according to claim 5, 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).

7. The three-position switch of the GIS equipment according to claim 1, 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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