Moving contact assembly of isolating switch and isolating switch

Abstract

The utility model discloses a moving contact assembly of an isolating switch and the isolating switch. The moving contact assembly comprises a first conductive arm; the second conductive arm and the first conductive arm are arranged in a crossed manner and are hinged; the movable contact strip is installed on the opposite sides of the upper ends of the first conductive arm and the second conductive arm and used for making contact with the static contact rod when the upper ends of the first conductive arm and the second conductive arm are closed, the movable contact strip comprises an attaching part, a connecting part and a contact part, the attaching part and the contact part are arranged in a spaced mode, one side of the connecting part is connected with the attaching part, and the other side of the connecting part is connected with the contact part. And the other side is connected with the contact part. According to the utility model, the heat dissipation performance and the elastic contact characteristic of the movable contact strip are improved, and the contact part has better elasticity and can be elastically and tightly contacted with the static contact rod due to the interval arrangement of the fitting part and the contact part, so that the efficiency and the reliability of current transmission are improved; in addition, the attaching part, the connecting part and the contact part are limited to form the open slot, so that the heat dissipation area is increased, heat can be quickly dissipated, and the moving contact strip is effectively prevented from being overheated.

Description

Technical Field

[0001] The utility model relates to the technical field of isolating switches, in particular to a movable contact assembly of an isolating switch and the isolating switch. Background Art

[0002] In power transmission and distribution systems, single-pole, double-arm, vertically telescopic outdoor high-voltage AC disconnectors are widely used. They must operate safely and reliably under various conditions around the world, placing extremely stringent and even demanding requirements on their insulation, conductivity, and mechanical performance. The clamping force of the main switch of a single-pole, double-arm, vertically telescopic outdoor high-voltage AC disconnector is an important factor in ensuring the conductivity of its conductive circuit.

[0003] When a moving contact operates under high voltage, the thermal effects of the current generate a significant amount of heat. Poor heat dissipation can lead to overheating, affecting normal operation or even damage. Furthermore, the quality of contact between the moving contact and the stationary contact rod directly impacts the efficiency and reliability of current transmission. Traditional moving contact designs often suffer from deficiencies in heat dissipation and contact elasticity. For example, limited heat dissipation area hinders rapid heat dissipation, while insufficient contact elasticity results in loose contact, hindering current transmission. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a movable contact assembly of an isolating switch and an isolating switch, which can.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] A moving contact assembly of an isolating switch comprises: a first conductive arm; a second conductive arm, which is arranged crosswise with the first conductive arm and is hingedly connected; a moving contact strip, which is installed on opposite sides of the upper ends of the first conductive arm and the second conductive arm, and is used to contact the static contact rod when the upper ends of the first conductive arm and the second conductive arm are closed together, the moving contact strip comprises a fitting portion, a connecting portion and a contact portion, the fitting portion is connected to the corresponding first conductive arm or the second conductive arm, the contact portion is used to contact the static contact rod, the fitting portion and the contact portion are spaced apart, one side of the connecting portion is connected to the fitting portion, and the other side is connected to the contact portion, and the fitting portion, the connecting portion and the contact portion define an open slot.

[0007] Furthermore, the fitting portion is provided with a plurality of first connection holes arranged along the length direction of the fitting portion, the first conductive arm and the second conductive arm are provided with a plurality of second connection holes corresponding to the first connection holes, the first connection holes are aligned with the corresponding second connection holes and are penetrated by bolts, and one end of the bolt passes through the first connection hole and the second connection hole, extends into the open slot and is connected with a nut.

[0008] Furthermore, a hollow cavity is formed in the middle of the first conductive arm and the second conductive arm, the second connecting hole is formed on one side of the hollow cavity, and a mounting through-hole aligned with the second connecting hole is provided on the other side of the hollow cavity. The mounting through-hole is used for allowing bolts to pass through during installation, and a rainproof cover is installed on the mounting through-hole to cover the mounting through-hole.

[0009] Furthermore, the movable contact strip is made of elastic metal material.

[0010] Furthermore, it also includes a mounting bar, the bottom of which is embedded in the open groove and the top is connected to a pressure equalizing cover; the bottom of the mounting bar and the corresponding fitting part and the corresponding first conductive arm or second conductive arm are provided with corresponding holes for connection and fixation by fasteners.

[0011] Furthermore, two first conductive arms are provided at intervals along the hinge axis direction, two second conductive arms are provided at intervals along the hinge axis direction, the two second conductive arms are located between the two first conductive arms, and the two second conductive arms and the two first conductive arms are passed through the same hinge axis to achieve hinge connection.

[0012] Furthermore, three insulating sleeves are sleeved on the hinge shaft to separate adjacent first conductive arms and second conductive arms, and two adjacent second conductive arms.

[0013] Furthermore, an insulating sleeve is sleeved on the hinge shaft, and four insulating sleeves are provided to correspond to the two first conductive arms and the two second conductive arms respectively; the four insulating sleeves and the three insulating sleeves are staggered and sleeved on the hinge shaft, and the first conductive arm and the second conductive arm are sleeved on the corresponding insulating sleeves.

[0014] Furthermore, the two first conductive arms are connected via a series rod.

[0015] The utility model also provides an isolating switch, comprising a movable contact assembly of the isolating switch.

[0016] The utility model has the following beneficial effects:

[0017] The utility model improves the heat dissipation performance and elastic contact characteristics of the moving contact strip. First, the spacing between the fitting part and the contact part of the moving contact strip makes the contact part have better elasticity, and can elastically and closely contact with the static contact rod, thereby improving the efficiency and reliability of current transmission; in addition, the open grooves defined by the fitting part, the connecting part and the contact part increase the heat dissipation area, which helps to quickly dissipate heat and effectively prevent the moving contact strip from overheating.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the dynamic touch assembly of the utility model;

[0021] Figure 2 yes Figure 1 Schematic diagram of the decomposed state structure;

[0022] Figure 3 1. It is a schematic diagram of the exploded structure of the first conductive arm and the moving contact strip;

[0023] Figure 4 yes Figure 3 A structural diagram from another perspective;

[0024] Figure 5 It is a schematic diagram of the local structure of the moving contact strip;

[0025] Figure 6 This is a structural diagram of the dynamic contact assembly and the static contact rod of the utility model;

[0026] Figure 7 yes Figure 6 Cross-sectional view at AA;

[0027] Figure 8 yes Figure 6 Cross-sectional view at BB.

[0028] Legend:

[0029] First conductive arm 100, static contact rod 101, second connection hole 110, hollow cavity 120, mounting hole 130, rainproof cover 140;

[0030] A second conductive arm 200;

[0031] The movable contact strip 300, the fitting portion 310, the first connecting hole 311, the connecting portion 320, the contact portion 330, and the opening slot 340;

[0032] Bolt 400, nut 410;

[0033] Mounting bar 500, threaded hole 510, pressure equalizing cover 520;

[0034] Articulated shaft 600, insulating sleeve 610, insulating sleeve 620

[0035] Tandem rod 700. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0040] Please refer to Figure 1 and Figure 2 In a preferred embodiment of the present invention, a movable contact assembly of an isolating switch includes a first conductive arm 100 , a second conductive arm 200 and a movable contact strip 300 .

[0041] The second conductive arm 200 and the first conductive arm 100 are cross-arranged and hingedly connected, so that the second conductive arm 200 and the first conductive arm 100 can be driven to separate and close together under the drive of the driving mechanism.

[0042] The moving contact strip 300 is installed on the opposite sides of the upper ends of the first conductive arm 100 and the second conductive arm 200, and is used to contact the stationary contact rod 101 when the upper ends of the first conductive arm 100 and the second conductive arm 200 are closed. Figure 5 As shown, the movable contact strip 300 includes a fitting portion 310, a connecting portion 320, and a contact portion 330. The fitting portion 310 is connected to the corresponding first conductive arm 100 or second conductive arm 200. That is, the movable contact strip 300 is divided into two groups, one group connected to the first conductive arm 100 and the other group connected to the second conductive arm 200. The contact portion 330 is used to contact the stationary contact rod 101. The fitting portion 310 and the contact portion 330 are spaced apart. One side of the connecting portion 320 is connected to the fitting portion 310 and the other side is connected to the contact portion 330. The fitting portion 310, the connecting portion 320, and the contact portion 330 define an open slot 340.

[0043] The present invention improves the heat dissipation performance and elastic contact characteristics of the moving contact strip 300, and is simple and convenient to install. First, the spacing between the fitting portion 310 and the contact portion 330 of the moving contact strip 300 makes the contact portion 330 have better elasticity, enabling elastic and close contact with the static contact rod 101, thereby improving the efficiency and reliability of current transmission; in addition, the open groove 340 defined by the fitting portion 310, the connecting portion 320 and the contact portion 330 increases the heat dissipation area, facilitates the rapid dissipation of heat, and effectively prevents the moving contact strip from overheating.

[0044] Reference Figure 3 and Figure 7 In some embodiments of the present invention, the fitting portion 310 is provided with a plurality of first connection holes 311 arranged along the length direction of the fitting portion 310, and the first conductive arm 100 and the second conductive arm 200 are provided with a plurality of second connection holes 110 corresponding to the first connection holes 311. The first connection holes 311 are aligned with the corresponding second connection holes 110 and are penetrated by bolts 400. One end of the bolt 400 passes through the first connection holes 311 and the second connection holes 110 and extends into the open groove 340 and is connected with a nut 410, thereby fixing the moving contact bar 300 on the first conductive arm 100 and the second conductive arm 200. The open groove 340 can also hide the nut 410, so that the moving contact bar 300 will not protrude and affect the contact with the static contact rod 101, and there is no need to provide a countersunk groove on the moving contact bar 300 to hide the nut 410.

[0045] Reference Figure 3 and Figure 4In some embodiments of the present invention, a hollow cavity 120 is formed in the middle of the first conductive arm 100 and the second conductive arm 200. The second connection hole 110 is formed on one side of the hollow cavity 120. A mounting hole 130 aligned with the second connection hole 110 is provided on the other side of the hollow cavity 120. The mounting hole 130 is used for passing the bolt 400 during installation. The provision of the hollow cavity 120 can effectively reduce the weight of the first conductive arm 100 and the second conductive arm 200, thereby achieving lightweight devices and reducing the size of the driving force and energy consumption. The provision of the mounting hole 130 prevents the bolt head 400 and the nut 410 from being clamped in the entire first conductive arm 100 and the second conductive arm 200, thereby easily causing the hollow cavity 120 to shrink and deform. Figure 6 and Figure 7 As shown, the bolt head of the bolt 400 can pass through the mounting hole 130, and the bolt head and the nut 410 cooperate to clamp the side wall of one side of the hollow cavity 120. The mounting hole 130 is installed with a rainproof cover 140 to cover the mounting hole 130, thereby preventing rainwater from easily entering the hollow cavity 120 and preventing rainwater from accumulating in the hollow cavity 120. It can be understood that the upper end of the hollow cavity 120 is opened, so a rainproof cap also needs to be installed on the upper end of the hollow cavity.

[0046] In a specific embodiment of the present invention, the movable contact strip 300 is made of an elastic metal material. Specifically, the movable contact strip 300 can be made of copper, which has excellent elastic deformation ability.

[0047] Reference Figure 2 and Figure 3 In some embodiments of the present invention, a mounting bar 500 is further included. The bottom of the mounting bar 500 is embedded in the open groove 340 and the top is connected to the pressure equalizing cover 520. The bottom of the mounting bar 500 is provided with corresponding holes to the corresponding fitting portion 310 and the corresponding first conductive arm 100 or second conductive arm 200 for connection and fixation by fasteners, such as Figure 3 As shown, the mounting bar 500 has a threaded hole 510 at its bottom, and the fitting portion 310 and the first conductive arm 100 have corresponding holes for screws to pass through. The screws connect with the threaded holes 510, thereby connecting and securing the first conductive arm 100, the mounting bar 500, and the fitting portion 310. Specifically, the mounting bar 500 has two groups: one group connects and secures to the first conductive arm 100 and the fitting portion 310 of the movable contact strip 300 thereon, and the other group connects and secures to the second conductive arm 200 and the fitting portion 310 of the movable contact strip 300 thereon. Furthermore, the mounting bar 500, the movable contact strip 300, and the first conductive arm 100 or the second conductive arm 200 are connected and secured using the same fasteners, reducing the number of fasteners. This reduces the number of holes and fasteners required to secure the movable contact strip 300 to the first conductive arm 100 or the second conductive arm 200, thereby simplifying the installation process.

[0048] Reference Figure 1 and Figure 8 In some embodiments of the present invention, two first conductive arms 100 are provided at intervals along the hinge axis direction, and two second conductive arms 200 are provided at intervals along the hinge axis direction. The two second conductive arms 200 are located between the two first conductive arms 100. The two second conductive arms 200 and the two first conductive arms 100 are penetrated by the same hinge axis 600 to achieve hinge connection, thereby realizing multi-position clamping contact with the static contact rod 101 and improving the stability of the electrical connection.

[0049] Reference Figure 8 In a further embodiment of the present invention, three insulating sleeves 610 are provided on the hinge shaft 600 to separate the adjacent first conductive arms 100 and the second conductive arms 200 and the adjacent two second conductive arms 200. Figure 1 and Figure 8 As shown, there are two pairs of adjacent first conductive arms 100 and second conductive arms 200 and one pair of adjacent second conductive arms 200 , so the three insulating sleeves 610 can separate the three pairs of adjacent conductive arms and play the role of axial positioning and insulation separation.

[0050] Reference Figure 8 In a further embodiment of the present invention, an insulating sleeve 620 is sleeved on the hinge shaft 600, and four insulating sleeves 620 are provided to correspond to the two first conductive arms 100 and the two second conductive arms 200 respectively; the four insulating sleeves 620 and the three insulating sleeves 610 are staggered and sleeved on the hinge shaft 600, so that the three insulating sleeves 610 can axially separate the four insulating sleeves 620, and the first conductive arm 100 and the second conductive arm 200 are sleeved on the corresponding insulating sleeves 620. The three insulating sleeves 610 simultaneously play a role in axial positioning and axial separation of the four insulating sleeves 620 and the four conductive arms, and the insulating sleeves 620 prevent the four conductive arms from being electrically connected through the hinge shaft 600. It can be understood that shaft necks are provided at both ends of the hinge shaft 600, and limiting structures such as nuts are installed on the shaft necks, thereby playing a role in axial limiting the three insulating sleeves 610, the four insulating sleeves 620 and the four conductive arms, preventing the structures on the hinge shaft 600 from slipping out from both ends.

[0051] Reference Figure 2 In some embodiments of the present invention, the two first conductive arms 100 are connected by a series rod 700, so that the two first conductive arms 100 move synchronously. Similarly, the two second conductive arms 200 are connected in series by a connecting rod to achieve synchronous movement.

[0052] The utility model also provides an isolating switch, comprising a movable contact assembly of the isolating switch.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A movable contact assembly of an isolating switch, characterized in that: include: a first conductive arm (100); A second conductive arm (200) is arranged to cross the first conductive arm (100) and is hingedly connected; A movable contact strip (300) is installed on the opposite sides of the upper ends of the first conductive arm (100) and the second conductive arm (200), and is used to contact the static contact rod (101) when the upper ends of the first conductive arm (100) and the second conductive arm (200) are closed and close to each other. The movable contact strip (300) includes a fitting portion (310), a connecting portion (320) and a contact portion (330). The fitting portion (310) is connected to the corresponding first conductive arm (100) or second conductive arm (200). The contact portion (330) is used to contact the static contact rod (101). The fitting portion (310) and the contact portion (330) are spaced apart. One side of the connecting portion (320) is connected to the fitting portion (310) and the other side is connected to the contact portion (330). The fitting portion (310), the connecting portion (320) and the contact portion (330) define an open slot (340).

2. The movable contact assembly of the isolating switch according to claim 1, characterized in that: The fitting portion (310) is provided with a plurality of first connection holes (311) arranged along the length direction of the fitting portion (310); the first conductive arm (100) and the second conductive arm (200) are provided with a plurality of second connection holes (110) corresponding to the first connection holes (311); the first connection holes (311) are aligned with the corresponding second connection holes (110) and are penetrated by bolts (400); one end of the bolt (400) passes through the first connection hole (311) and the second connection hole (110), extends into the open slot (340), and is connected to a nut (410).

3. The movable contact assembly of the isolating switch according to claim 2, characterized in that: A hollow cavity (120) is formed in the middle of the first conductive arm (100) and the second conductive arm (200), the second connecting hole (110) is formed on one side of the hollow cavity (120), and a mounting hole (130) aligned with the second connecting hole (110) is provided on the other side of the hollow cavity (120), the mounting hole (130) is used for allowing a bolt to pass through during installation, and a rainproof cover (140) is installed on the mounting hole (130) to cover the mounting hole (130).

4. The movable contact assembly of the isolating switch according to claim 1, characterized in that: The movable contact strip (300) is made of elastic metal material.

5. The movable contact assembly of the isolating switch according to claim 1, characterized in that: The invention also includes a mounting bar (500), wherein the bottom of the mounting bar (500) is embedded in the open groove (340) and the top is connected to the pressure equalizing cover (520); the bottom of the mounting bar (500) and the corresponding fitting portion (310) and the corresponding first conductive arm (100) or second conductive arm (200) are provided with corresponding holes for connection and fixation via fasteners.

6. The movable contact assembly of the isolating switch according to claim 1, characterized in that: Two first conductive arms (100) are spaced apart along the direction of the hinge axis, and two second conductive arms (200) are spaced apart along the direction of the hinge axis. The two second conductive arms (200) are located between the two first conductive arms (100), and the two second conductive arms (200) and the two first conductive arms (100) are penetrated by the same hinge axis (600) to achieve hinge connection.

7. The movable contact assembly of the isolating switch according to claim 6, characterized in that: Three insulating sleeves (610) are sleeved on the hinge shaft (600) to separate adjacent first conductive arms (100) and second conductive arms (200), and two adjacent second conductive arms (200).

8. The movable contact assembly of the isolating switch according to claim 7, characterized in that: An insulating sleeve (620) is sleeved on the hinge shaft (600), and four insulating sleeves (620) are provided to correspond to the two first conductive arms (100) and the two second conductive arms (200) respectively; the four insulating sleeves (620) and the three insulating sleeves (610) are staggered and sleeved on the hinge shaft (600), and the first conductive arm (100) and the second conductive arm (200) are sleeved on the corresponding insulating sleeves (620).

9. The movable contact assembly of the isolating switch according to claim 1, characterized in that: The two first conductive arms (100) are connected via a series rod (700).

10. An isolating switch, characterized in that: A movable contact assembly comprising the isolating switch according to any one of claims 1 to 9.

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