Contact structure capable of preventing wrong installation and vacuum arc-extinguishing chamber

Abstract

The utility model discloses an anti-misloading contact structure and a vacuum arc-extinguishing chamber of a circuit breaker, the contact structure comprises a sheet-shaped contact, and the center of the contact is provided with a connecting hole; the two surfaces of the contact in the thickness direction respectively comprise at least one contact surface and at least one non-contact surface positioned on the periphery of the contact surface; the connecting holes comprise a first hole penetrating through one contact surface of the contact and a second hole penetrating through the other contact surface of the contact, and the first hole and the second hole are different in size and / or shape. According to the contact structure of the utility model, the moving contact and the static contact can be used universally, so that the moving contact and the static contact do not need to be processed and formed independently, and installation is not easy to make mistakes. According to the utility model, the connecting holes comprise the first hole and the second hole which are different in size and / or shape, so that fool-proof and mistake-proof effects can be achieved during installation, and the rotation directions of the arc grooves of the moving contact and the static contact are consistent.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum arc extinguishing technical field especially to a prevent wrong contact structure and vacuum arc extinguishing chamber. BACKGROUND

[0002] The dynamic and static contact of vacuum arc extinguishing chamber is respectively provided with arc groove, and the rotation direction of arc groove is opposite, namely the rotation direction of arc groove of dynamic and static contact presents mirror image structure, in actual production process, dynamic and static contact is two separate parts, and the utilization rate of part is low, and the cost is higher, which brings inconvenience to batch production. SUMMARY

[0003] The utility model provides a prevent wrong contact structure and vacuum arc extinguishing chamber for the technical problem of prior art, it can improve production efficiency, and product consistency is good.

[0004] The utility model provides a prevent wrong contact structure, including the contact of sheet shape, the center of this contact is equipped with connecting hole, two surfaces of the contact in its thickness direction respectively include at least one contact surface and at least one non-contact surface located in the periphery of contact surface, the connecting hole includes the first hole of the one contact surface of the first hole and the second hole of the second hole of the other contact surface of the second hole of the contact, and the first hole and the second hole are not same in size and shape.

[0005] Further, the non-contact surface is located at the edge position of the contact, the thickness of the part of the contact provided with the non-contact surface gradually decreases in the direction of the contact radially outward, and / or the thickness of the part of the contact provided with the non-contact surface is less than the thickness of the part of the contact provided with the contact surface, so that the contact surface protrudes from the non-contact surface.

[0006] Further, the non-contact surface is a bevel or an arc surface.

[0007] Further, the first hole and the second hole are in communication, and the first hole and the second hole are connected by a step surface, or a third hole is arranged between the first hole and the second hole, the third hole is in communication with the first hole and the second hole, or the first hole and the second hole are blind holes.

[0008] Further, the cross-sectional area of the first hole is greater than the cross-sectional area of the second hole, and the first hole and the second hole are the same in shape.

[0009] Further, the first hole away from the second hole end is provided with a first chamfer, and the second hole away from the first hole end is provided with a second chamfer.

[0010] Further, the contact is provided with a plurality of arc grooves, which are distributed at intervals around the axis of the contact; one end of the arc groove is located in the middle region of the contact, and the other end of the arc groove penetrates the outer peripheral surface of the contact.

[0011] The utility model discloses still provide a kind of vacuum arc-extinguishing chamber, including contact group, which includes movable contact and static contact which cooperate with each other;The movable contact, static contact respectively adopt the contact structure of preventing wrong installation as above-mentioned utility model, and the first hole of movable contact is away from static contact, and is connected with a movable conducting rod, and the second hole of static contact is away from movable contact, and is connected with a static conducting rod.

[0012] Further, it further includes ceramic tube, first sealing ring, second sealing ring, the ceramic tube is arranged between the first sealing ring and the second sealing ring, the contact group is located in the first sealing ring, the static conducting rod is arranged in the first sealing ring, and the movable conducting rod is arranged in the second sealing ring;It further includes shielding cover, which is connected to the first sealing ring and / or ceramic tube, and isolates the ceramic tube and contact group;The shielding cover is provided with a clearance hole corresponding to the movable conducting rod.

[0013] Further, it further includes shielding plate, which is sleeved outside the movable conducting rod and located between the movable contact and the shielding cover, and the outer diameter of the shielding plate is greater than the inner diameter of the clearance hole.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、Since the two surfaces of the contact in its thickness direction respectively include a contact surface and a non-contact surface located at the periphery of the contact surface, the contact can realize "one use two": the movable and static contacts can be formed without separate processing, the same type of contact can be used to achieve, the installation is not prone to error, and the production efficiency can be improved, the product consistency is good, and the overall performance of the product is improved; The non-contact surface mainly bears the arc running function, and only bears a small arc starting function, so that the ablation degree of the peripheral surface of the contact at the initial breaking stage can be reduced, thereby improving the electrical life capacity of the product. Since the connecting hole includes a first hole penetrating one contact surface of the contact and a second hole penetrating the other contact surface of the contact, the first hole and the second hole are different in size and shape, so that the utility model can be distinguished by the first hole and the second hole and connected with the movable and static conducting rods, thereby playing the role of preventing mistakes and errors during installation, and further making the rotation directions of the arc grooves of the movable and static contacts consistent.

[0016] 2. The shielding plate and the shielding cover are arranged to be partially staggered, so that the arc and the metal vapor can be completely shielded, the inner wall of the ceramic tube is prevented from being polluted, and the insulation performance of the product after breaking is ensured.

[0017] The utility model will be further explained in detail in connection with the drawings and embodiments; but the utility model discloses a kind of contact structure and vacuum arc-extinguishing chamber of preventing misplacement, which is not limited to embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the three-dimensional structure schematic diagram of the first contact structure of the utility model;

[0019] Figure 2 It is the plan view of the contact structure of the utility model;

[0020] Figure 3 It is Figure 2 A-A section view of;

[0021] Figure 4 It is Figure 3 the enlarged schematic diagram of B part in;

[0022] Figure 5 It is the plan view of the second contact structure of the utility model;

[0023] Figure 6 It is the plan view of the third contact structure of the utility model;

[0024] Figure 7 It is the plan view of the fourth contact structure of the utility model;

[0025] Figure 8 It is the plan view of the fifth contact structure of the utility model;

[0026] Figure 9 It is the section view of the first vacuum arc-extinguishing chamber of the utility model;

[0027] Figure 10 It is the section view of the second vacuum arc-extinguishing chamber of the utility model;

[0028] In the drawing, 1, contact; 11, connecting hole; 111, first hole; 112, second hole; 113, step surface; 114, first chamfer; 115, second chamfer; 116, third hole 12, contact surface; 13, inclined surface; 14, arc groove; 2, moving contact; 3, static contact; 4, moving conducting rod; 5, static conducting rod; 6, first sealing ring; 7, second sealing ring; 8, ceramic tube; 9, shielding cover; 91, let-position hole; 10, shielding plate. DETAILED DESCRIPTION

[0029] In the utility model, the terms "first", "second" and the like are used only to distinguish similar objects, and in addition, in the description of the utility model, "a plurality of" means two or more than two, and "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0030] Please refer to Figures 1-4 As shown in the utility model, a contact structure to prevent misassembly, comprising a contact 1 in the form of a sheet, the center of the contact 1 is provided with a connecting hole 11 for connecting the conductive rod, the two surfaces of the contact 1 in the thickness direction respectively include at least one contact surface 12 and at least one non-contact surface 13 located at the periphery of the contact surface 12. The contact surface 12 refers to the surface that can play a contact role when the moving and static contacts are closed, while the non-contact surface 13 does not play a contact role. In this embodiment, the contact surface 12 is a plane perpendicular to the thickness direction of the contact 1, but it is not limited to this, in other embodiments, the contact surface is an arc surface or an irregular surface, etc. The non-contact surface 13 is located at the edge position of the contact 1, the thickness of the part of the contact 1 provided with the non-contact surface 13 gradually decreases in the direction of the radial outward of the contact 1, and the thickness of the part of the contact 1 provided with the non-contact surface 13 is smaller than the thickness of the part of the contact 1 provided with the contact surface 12, so that the contact surface 12 protrudes from the non-contact surface 12. Specifically, in this embodiment, the contact surface 12 is a plane perpendicular to the thickness direction of the contact 1, but it is not limited to this, in other embodiments, the contact surface 12 is an arc surface or an irregular surface, etc. The non-contact surface 13 is a bevel, but it is not limited to this, the bevel can also be replaced by an arc surface, which belongs to equivalent replacement.

[0031] The connecting hole 11 comprises a first hole 111 penetrating one contact surface 12 of the contact 1 and a second hole 112 penetrating another contact surface 12 of the contact 1, the first hole 111 and the second hole 112 are different in size and shape, and the first hole 111 and the second hole 112 are used for connecting different conductive rods. In the embodiment, the cross-sectional area of the first hole 111 is larger than that of the second hole 112, and the first hole 111 and the second hole 112 are of the same shape. Specifically, the first hole 111 and the second hole 112 are both cylindrical holes, and the inner diameter of the first hole 111 is larger than that of the second hole 112. The first hole 111 and the second hole 112 are in communication with each other, and the first hole 111 and the second hole 112 are transitioned by a stepped surface 113. In other embodiments, a third hole 116 is provided between the first hole 111 and the second hole 112, the third hole 116 is in communication with the first hole 111 and the second hole 112, and the first hole 111 and the second hole 112 are both cylindrical holes, the third hole 116 is also a cylindrical hole, and the inner diameter of the third hole 116 is smaller than that of the first hole 111 and the second hole 112, as shown in Figure 5 , or the first hole 111 and the second hole 112 are both tapered holes with narrow inner diameter and wide outer diameter, as shown in Figure 6 . In other embodiments, the first hole 111 and the second hole 112 are both blind holes, so the first hole 111 and the second hole 112 are not in communication, the first hole 111 and the second hole 112 are both cylindrical holes, as shown in Figure 7 , or the first hole 111 and the second hole 112 are both tapered holes with narrow inner diameter and wide outer diameter, as shown in Figure 8 , but the shapes of the first hole 111 and the second hole 112 are not limited thereto.

[0032] The first hole 111 is provided with a first chamfer 114 at one end away from the second hole 112, and the second hole 112 is provided with a second chamfer 115 at one end away from the first hole 111, so as to guide the insertion of the conductive rod into one end of the first hole 111 or the second hole 112 during installation.

[0033] In the embodiment, the contact 1 is provided with a plurality of arc grooves 14, the plurality of arc grooves 14 are distributed at intervals around the axis of the contact 1, each arc groove 14 is substantially spiral, and one end of the arc groove 14 is located in the middle region of the contact 1, and the other end of the arc groove 14 penetrates the outer peripheral surface of the contact 1.

[0034] The utility model discloses a contact 1 periphery adds bevel (namely non -contact surface 13) cooperation two holes of different sizes realizes movable contact and static contact general, namely, the contact 1 of the utility model can be used as movable contact, also can be used as static contact, thereby making movable contact, static contact can not be separately processed into shape, and installation is not easy to make a mistake, not only has improved production efficiency greatly, also makes product consistency good, promotes product overall performance. In addition, its non -contact surface 13 mainly undertakes the role of running arc, only undertakes the less arc starting effect, can reduce the ablation degree of contact 1 peripheral surface at the initial stage of breaking, thereby improving the electric life ability of product.

[0035] The utility model discloses make connecting hole 11 include first hole 111 and second hole 112 of different sizes, make the utility model can utilize first hole 111, second hole 112 and distinguish and respectively with movable conducting rod, static conducting rod cooperation connection, thereby can play the role of preventing stupid, preventing mistake when installing, can ensure that the rotation direction of arc groove on movable contact and static contact is consistent.

[0036] Please see Figures 1-10 The utility model discloses a vacuum arc-extinguishing chamber, specifically a vacuum arc-extinguishing chamber of circuit breaker, it includes contact group, and the contact group includes movable contact 2 and static contact 3 that cooperate with each other, and movable contact 2, static contact 3 respectively uses the contact structure of preventing mistake of above-mentioned utility model, namely, and the first hole 111 of movable contact 2 is away from static contact 3, and is connected with movable conducting rod 4, and the second hole 112 of static contact 3 is away from movable contact 2, and is connected with static conducting rod 5. Specifically, the connection mode of first hole 111 and movable conducting rod 4, the connection mode of second hole 112 and static conducting rod 5 are respectively welded, but not limited to this, still can adopt riveting, interference insertion etc.

[0037] The utility model discloses still include ceramic pipe 8, first sealing ring 6, second sealing ring 7, and ceramic pipe 8 sets up between first sealing ring 6 and second sealing ring 7. Contact group is located in first sealing ring 6, and static conducting rod 5 is worn in first sealing ring 6, and movable conducting rod 4 is worn in second sealing ring 7. The utility model discloses still include shield 9, and this shield 9 is connected in first sealing ring 6 and / or ceramic pipe 8, and separates ceramic pipe 8 and contact group;Shield 9 is equipped with the hole 91 of giving place to movable conducting rod 4.

[0038] The utility model also includes shielding board 10, this shielding board 10 is sleeved in dynamic conducting rod 4 outside, and is located between dynamic contact 2 and shield 9, and the outer diameter of shielding board 10 is greater than the inner diameter of the hole for passing. Specifically, shielding board 10 is sleeved on the step gap of the outside of dynamic conducting rod 4 and is limited in the limiting recess formed by step gap and dynamic contact 2. The setting of shielding board 10 and shield 9 makes shielding board 10 and shield 9 stagger partially, so that arc and metal vapor can be completely shielded, prevent the pollution of the inner wall of ceramic tube 8, and ensure the insulation performance after product breaking.

[0039] The part not involved in the utility model of a kind of contact structure and vacuum arc-extinguishing chamber for preventing misassembly is same as prior art or can be realized by prior art.

[0040] The above embodiment is only used to further illustrate the utility model of a kind of contact structure and vacuum arc-extinguishing chamber for preventing misassembly, but the utility model is not limited to the embodiment, any simple modification, equivalent change and modification according to the technical essence of the utility model to the above embodiment all fall into the protection scope of the utility model technical scheme.

Claims

1. A mistake-proof contact structure comprising a contact in the form of a tab, the contact having a connection hole in the center thereof; characterized by: The two surfaces of the contact in the thickness direction thereof respectively comprise at least one contact surface and at least one non-contact surface located at the periphery of the contact surface; the connecting hole comprises a first hole hole through one of the contact surfaces of the contact and a second hole hole through the other contact surface of the contact, and the first hole hole and the second hole hole are different in size and / or shape.

2. The misplug resistant contact structure of claim 1, wherein: The non-contact surface is located at the edge of the contact, the thickness of the part of the contact provided with the non-contact surface gradually decreases in the direction radially outward of the contact, and / or the thickness of the part of the contact provided with the non-contact surface is smaller than the thickness of the part of the contact provided with the contact surface, so that the contact surface protrudes from the non-contact surface.

3. The misplug resistant contact structure of claim 2, wherein: The non-contact surface is a bevel or an arc surface.

4. The misplug resistant contact structure of claim 1, wherein: The first hole hole and the second hole hole are in communication with each other, and a step surface is arranged between the first hole hole and the second hole hole, or a third hole hole is arranged between the first hole hole and the second hole hole, the third hole hole being in communication with the first hole hole and the second hole hole, or the first hole hole and the second hole hole are blind holes respectively.

5. The misplug resistant contact structure of claim 1, wherein: The cross-sectional area of the first hole hole is larger than the cross-sectional area of the second hole hole, and the first hole hole and the second hole hole are the same in shape.

6. The misplug resistant contact structure of claim 1, wherein: The end of the first hole hole away from the second hole hole is provided with a first chamfer, and the end of the second hole hole away from the first hole hole is provided with a second chamfer.

7. The misplug resistant contact structure of claim 1, wherein: The contact is provided with a plurality of arc grooves, and the plurality of arc grooves are distributed at intervals around the axis of the contact; one end of the arc groove is located in the middle region of the contact, and the other end of the arc groove penetrates the outer peripheral surface of the contact.

8. A vacuum interrupter comprising a contact set, the contact set comprising a movable contact and a stationary contact cooperating with each other; characterized in that: The movable contact and the fixed contact respectively adopt the anti-misassembly contact structure according to any one of claims 1-7, the first hole hole of the movable contact is away from the fixed contact and is connected with a movable conducting rod, and the second hole hole of the fixed contact is away from the movable contact and is connected with a fixed conducting rod.

9. The vacuum interrupter of claim 8, wherein: Further comprising a ceramic tube, a first sealing ring and a second sealing ring, the ceramic tube is arranged between the first sealing ring and the second sealing ring, the contact group is located in the first sealing ring, the fixed conducting rod is arranged in the first sealing ring, and the movable conducting rod is arranged in the second sealing ring; further comprising a shielding cover connected to the first sealing ring and / or the ceramic tube and isolating the ceramic tube and the contact group; the shielding cover is provided with a clearance hole corresponding to the movable conducting rod.

10. The vacuum interrupter of claim 9, wherein: Further comprising a shielding plate sleeved outside the movable conducting rod and located between the movable contact and the shielding cover, and the outer diameter of the shielding plate is greater than the inner diameter of the clearance hole. Further comprising a shielding plate sleeved outside the movable conducting rod and located between the movable contact and the shielding cover, and the outer diameter of the shielding plate is greater than the inner diameter of the clearance hole.

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