Switch contact device for high-voltage direct current on-off

Abstract

The utility model discloses a switch contact device for high-voltage direct current on-off, and relates to the technical field of contact devices. The switch contact device for high-voltage direct current on-off comprises a base, and a static contact is arranged over the base through a guide rod; the number of the moving contacts is four, and the four moving contacts are arranged on the upper surface of the base in a circumferential array; and the driving assembly is used for driving the four moving contacts to be connected with the static contacts at the same time. According to the utility model, through the arrangement of the driving assembly, when the moving contacts need to be connected with the static contacts, the device can start the driving motor to realize the purpose that the four moving contacts are simultaneously connected with the static contacts, so that compared with the prior art, the friction damage of the moving contacts and the static contacts in the frequent disconnection process is avoided, and the service life of the device is prolonged. And meanwhile, the generation of friction heat is avoided, and the service life of the high-voltage direct-current on-off switch is ensured while the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of contact devices, in particular to a switch contact device used for high-voltage direct current switching. Background Art

[0002] Electrical contacts are important components of high-voltage circuit breakers, switchgear, disconnectors, and earthing switches, and their performance directly affects the quality and service life of these high-voltage electrical appliances. A patent for a new type of high-voltage switch moving and static contacts is currently available, with patent publication number CN215118740U. The patent includes a moving contact base, including a connection disk disposed on its top, a spring base disposed on its surface, and a fastening spring disposed on the top of the spring base; a moving contact plum petal, including a metal slip ring disposed on its outer side, and an arc-shaped protrusion disposed on its inner side; and a static contact, including a groove disposed on its surface that cooperates with the arc-shaped protrusion. The utility model fixes the moving contact plum petal through the connection disk, and then, through the fastening spring, spring base, and metal slip ring, not only fastens the moving contact plum petal to the moving contact base, but also plays a role in equalizing voltage and current. Since the metal slip ring has a large cross-section and strong mechanical properties, and the moving and static contacts are in surface contact, the possibility of burning due to heat caused by poor contact is avoided.

[0003] Regarding the above-mentioned related technologies, the inventors believe that there are the following defects: Although the technical solution proposed by the above-mentioned patent technology can avoid the possibility of burning the contacts due to heat caused by poor contact, the moving contact plum petals will produce friction with the surface of the static contact during the connection with the static contact. When used frequently for a long time, it is easy to cause wear of the moving contact plum petals and the static contact, thereby affecting the sensitivity of the switch, and also causing the surface temperature of the moving contact plum petals and the static contact to rise, posing certain safety hazards. Therefore, we propose a switch contact device for high-voltage DC switching to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a switch contact device for high-voltage direct current switching, which solves the problem of friction generated when a moving contact and a static contact are connected, as mentioned in the background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A switch contact device for high-voltage direct current switching, comprising:

[0006] A base, a static contact is provided directly above the base through a guide rod, and an annular connecting groove is provided on the outer surface of the static contact;

[0007] There are four moving contacts, and the four moving contacts are arranged in a circular array on the upper surface of the base;

[0008] A drive assembly is used to drive four moving contacts to connect with the static contacts at the same time. The drive assembly includes four L-shaped rods slidably arranged in a circular array on the upper surface of the base, and an installation cavity opened inside the base. A drive motor is provided inside the installation cavity for driving the four L-shaped rods to move simultaneously toward the middle or toward the surroundings, and the four moving contacts are respectively fixed at the top ends of the four L-shaped rods.

[0009] Preferably, the driving assembly further comprises four rectangular grooves provided in a circular array on the upper surface of the base, and the outer surfaces of the bottom ends of the four L-shaped rods are respectively slidably connected to the inner walls of the four rectangular grooves.

[0010] Preferably, the inner walls of the four rectangular grooves are rotatably provided with threaded columns, and the outer surfaces of the L-shaped rods are provided with threaded holes that are respectively threadedly connected to the outer surfaces of the four threaded columns.

[0011] Preferably, the output end of the driving motor is fixed with a driving bevel gear, and one end of each of the four threaded columns extends into the interior of the mounting cavity and is fixed with a driven bevel gear, and the four driven bevel gears are meshed with the driving bevel gear.

[0012] Preferably, four connecting blocks are fixed on the upper surface of the base in a circular array, and corresponding limiting rods are fixed on the surfaces of the four connecting blocks. The four limiting rods are respectively fixed with mounting plates at one end away from the four connecting blocks, and the surfaces of the four L-shaped rods are respectively provided with sliding holes that are slidably connected to the outer surfaces of the four limiting rods.

[0013] Preferably, the surface of the moving contact is provided with a metal connecting ball that is compatible with the annular connecting groove on the surface of the static contact, the surface of the moving contact is fixed with a conductor cylinder, and the inner wall of the conductor cylinder is slidably provided with a conductor column, and the metal connecting ball is fixed at the end of the conductor column.

[0014] Preferably, a holding spring is fixedly provided on one end of the conductor post away from the metal connecting ball, and the end of the holding spring away from the conductor post is fixedly connected to the inner wall of the conductor cylinder.

[0015] Beneficial effects

[0016] The utility model provides a switch contact device for high-voltage direct current switching. Compared with the prior art, it has the following advantages:

[0017] The switch contact device for high-voltage DC switching is provided with a drive component so that when the device needs to connect the moving contact with the static contact, the drive motor can be started to achieve the purpose of connecting the four moving contacts with the static contacts at the same time. Compared with the existing technology, friction damage to the moving contact and the static contact during frequent disconnection is avoided, and the generation of friction heat is avoided, thereby improving safety and ensuring the service life of the high-voltage DC switching switch. Moreover, when the metal connecting ball contacts the inner wall of the annular connecting groove, the continued rotation of the drive motor can compress the clamping spring, so that the metal connecting ball can fully press against the inner wall of the annular connecting groove under the reaction force of the clamping spring, thereby ensuring the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 3 For this utility model Figure 2 A in the middle is an enlarged structural diagram;

[0021] Figure 4 For this utility model Figure 2 Enlarged structural diagram at point B in the middle.

[0022] In the picture:

[0023] 100, base;

[0024] 200, static contact;

[0025] 300, annular connecting groove;

[0026] 400, moving contact; 401, metal connecting ball; 402, conductor tube; 403, conductor post; 404, holding spring;

[0027] 500, drive assembly; 501, L-shaped rod; 502, drive motor; 503, threaded column; 504, driving bevel gear; 505, driven bevel gear; 506, connecting block; 507, limit rod; 508, mounting plate. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] See also Figure 1-4 The utility model provides a technical solution: a switch contact device for high-voltage direct current switching, comprising:

[0031] The base 100 has a static contact 200 disposed directly above the base 100 through a guide rod, and an annular connecting groove 300 is formed on the outer surface of the static contact 200;

[0032] The movable contacts 400 are four in number and are arranged in a circular array on the upper surface of the base 100 ;

[0033] The driving assembly 500 is used to drive the four moving contacts 400 to connect with the static contact 200 at the same time. The driving assembly 500 includes four L-shaped rods 501 slidingly arranged in a circular array on the upper surface of the base 100, and an installation cavity opened inside the base 100. A driving motor 502 is provided inside the installation cavity for driving the four L-shaped rods 501 to move simultaneously toward the middle or to the surroundings, and the four moving contacts 400 are respectively fixed at the top ends of the four L-shaped rods 501.

[0034] See Figure 2 、 Figure 3 The driving assembly 500 further includes four rectangular grooves formed in a circular array on the upper surface of the base 100 , and the outer surfaces of the bottom ends of the four L-shaped rods 501 are respectively slidably connected to the inner walls of the four rectangular grooves.

[0035] By providing the rectangular groove, the moving direction of the L-shaped rod 501 can be limited.

[0036] See Figure 3 The inner walls of the four rectangular grooves are all rotatably provided with threaded columns 503, and the outer surfaces of the L-shaped rods 501 are each provided with threaded holes that are respectively threadedly connected to the outer surfaces of the four threaded columns 503.

[0037] By providing the threaded column 503 , the L-shaped rod 501 can be automatically moved by rotating the threaded column 503 .

[0038] See Figure 3 The output end of the driving motor 502 is fixed with a driving bevel gear 504, and one end of each of the four threaded columns 503 extends into the interior of the mounting cavity and is fixed with a driven bevel gear 505. The four driven bevel gears 505 are all meshed with the driving bevel gear 504.

[0039] By providing the driving bevel gear 504 and the driven bevel gear 505 , the four threaded columns 503 can be driven to rotate simultaneously by the rotation of the driving motor 502 .

[0040] See Figure 2 、 Figure 3 Four connecting blocks 506 are fixed on the upper surface of the base 100 in a circular array, and corresponding limiting rods 507 are fixed on the surfaces of the four connecting blocks 506. The four limiting rods 507 are respectively fixed with mounting plates 508 at one end away from the four connecting blocks 506, and the surfaces of the four L-shaped rods 501 are respectively provided with sliding holes that are slidably connected to the outer surfaces of the four limiting rods 507.

[0041] By providing the limiting rod 507 , the stability of the L-shaped rod 501 during movement is effectively ensured.

[0042] In this embodiment, by setting up a drive component 500, the device can start the drive motor 502 when it is necessary to connect the moving contact 400 with the static contact 200, driving the four moving contacts 400 to move toward the middle at the same time, thereby achieving the purpose of connecting the four moving contacts 400 with the static contact 200 at the same time. Compared with the existing technology, this avoids friction damage between the moving contact 400 and the static contact 200 during frequent connection and disconnection, and avoids the generation of friction heat, thereby improving safety while ensuring the service life of the high-voltage DC on-off switch.

[0043] Example 2

[0044] Based on the first embodiment, and different from the first embodiment,

[0045] See Figure 2 、 Figure 4 The surface of the moving contact 400 is provided with a metal connecting ball 401 that is compatible with the annular connecting groove 300 on the surface of the static contact 200. A conductor tube 402 is fixedly provided on the surface of the moving contact 400, and a conductor column 403 is slidingly provided on the inner wall of the conductor tube 402. The metal connecting ball 401 is fixed at the end of the conductor column 403.

[0046] By providing the metal connecting ball 401 , it can be ensured that the moving contact 400 can be fully connected to the annular connecting groove 300 .

[0047] See Figure 4 A holding spring 404 is fixedly provided at one end of the conductor post 403 away from the metal connecting ball 401 , and one end of the holding spring 404 away from the conductor post 403 is fixedly connected to the inner wall of the conductor tube 402 .

[0048] By providing the pressing spring 404 , the metal connecting ball 401 can be pressed against the inside of the annular connecting groove 300 under the reaction force of the pressing spring 404 .

[0049] In this embodiment, when the metal connecting ball 401 contacts the inner wall of the annular connecting groove 300, the metal connecting ball 401 can be fully pressed against the inner wall of the annular connecting groove 300 under the reaction force of the pressing spring 404, thereby ensuring the stability of the connection.

[0050] During operation, when the device needs to connect the moving contact 400 with the static contact 200, it can start the drive motor 502. The rotation of the drive motor 502 drives the active bevel gear 504 to rotate. The rotation of the active bevel gear 504 drives the four driven bevel gears 505 to rotate at the same time, thereby driving the four threaded columns 503 to rotate at the same time. The rotation of the four threaded columns 503 drives the four L-shaped rods 501 to move toward the middle at the same time, thereby driving the four moving contacts 400 to move toward the middle at the same time, thereby achieving the purpose of connecting the four moving contacts 400 with the static contact 200 at the same time. During the connection process, the moving contact 40 0 does not generate friction with the static contact 200, thereby avoiding friction damage between the moving contact 400 and the static contact 200 during frequent connection and disconnection compared to the prior art, and avoiding the generation of friction heat, thereby improving safety while ensuring the service life of the high-voltage DC on-off switch. Moreover, when the metal connecting ball 401 contacts the inner wall of the annular connecting groove 300, the continued rotation of the driving motor 502 can compress the tightening spring 404, so that the metal connecting ball 401 can fully press against the inner wall of the annular connecting groove 300 under the reaction force of the tightening spring 404, thereby ensuring the stability of the connection.

[0051] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A switch contact device for high voltage direct current switching, characterized in that: include: A base (100), a static contact (200) being provided directly above the base (100) via a guide rod, and an annular connecting groove (300) being provided on the outer surface of the static contact (200); Moving contacts (400), the number of the moving contacts (400) is four, and the four moving contacts (400) are arranged in a circular array on the upper surface of the base (100); A drive assembly (500) is provided for driving four moving contacts (400) to be connected to the stationary contact (200) at the same time, the drive assembly (500) comprising four L-shaped rods (501) slidably arranged in a circular array on the upper surface of a base (100), and an installation cavity provided inside the base (100), wherein a drive motor (502) is provided inside the installation cavity for driving the four L-shaped rods (501) to move simultaneously toward the center or toward the periphery, and the four moving contacts (400) are respectively fixed to the top ends of the four L-shaped rods (501).

2. A switch contact device for high-voltage direct current switching according to claim 1, characterized in that: The driving assembly (500) further comprises four rectangular grooves arranged in a circumferential array on the upper surface of the base (100), and the outer surfaces of the bottom ends of the four L-shaped rods (501) are respectively slidably connected to the inner walls of the four rectangular grooves.

3. A switch contact device for high-voltage direct current switching according to claim 2, characterized in that: The inner walls of the four rectangular grooves are all rotatably provided with threaded columns (503), and the outer surfaces of the L-shaped rods (501) are each provided with threaded holes that are respectively threadedly connected to the outer surfaces of the four threaded columns (503).

4. A switch contact device for high-voltage direct current switching according to claim 3, characterized in that: The output end of the driving motor (502) is fixedly provided with a driving bevel gear (504), and one end of each of the four threaded columns (503) extends into the interior of the installation cavity and is fixedly provided with a driven bevel gear (505), and the four driven bevel gears (505) are all meshed with the driving bevel gear (504).

5. The switch contact device for high-voltage direct current switching according to claim 1, characterized in that: Four connecting blocks (506) are fixedly provided on the upper surface of the base (100) in a circular array, and corresponding limiting rods (507) are fixedly provided on the surfaces of the four connecting blocks (506). A mounting plate (508) is fixedly provided on one end of the four limiting rods (507) away from the four connecting blocks (506), and sliding holes are opened on the surfaces of the four L-shaped rods (501) for sliding connection with the outer surfaces of the four limiting rods (507).

6. The switch contact device for high-voltage direct current switching according to claim 1, characterized in that: The surface of the movable contact (400) is provided with a metal connecting ball (401) adapted to the annular connecting groove (300) on the surface of the static contact (200), the surface of the movable contact (400) is fixedly provided with a conductor cylinder (402), and the inner wall of the conductor cylinder (402) is slidably provided with a conductor column (403), and the metal connecting ball (401) is fixedly provided at the end of the conductor column (403).

7. The switch contact device for high-voltage direct current switching according to claim 6, characterized in that: A holding spring (404) is fixedly provided on one end of the conductor post (403) away from the metal connecting ball (401), and an end of the holding spring (404) away from the conductor post (403) is fixedly connected to the inner wall of the conductor cylinder (402).

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