Isolating switch with arc extinguishing device

Abstract

The utility model discloses an isolating switch with an arc extinguishing device, which structurally comprises a shell, the shell is provided with a plurality of mutually spliced layer shells and a shell cover located at the uppermost part, an assembling recess for bearing a contact assembly is formed above each layer shell, the contact assembly comprises a moving contact unit and a static contact piece, and the moving contact unit is provided with a plurality of arc extinguishing devices. The moving contact unit comprises a disc-shaped support and a moving contact piece arranged on the disc-shaped support, two arc extinguishing chambers are further formed in the assembling concave position, and deionization pieces are arranged in the arc extinguishing chambers. When the switch equipment is powered on or off, the disc-shaped support is controlled to rotate, the disc-shaped support drives the movable contact piece to rotate and enables the two ends of the movable contact piece to be in contact with or disconnected from the two corresponding static contact pieces, and due to the fact that electric arcs can be generated when the movable contact piece and the static contact pieces are disconnected or disconnected, the electric arcs enter the two arc extinguishing cavities for arc extinguishing. And a deionization sheet is also arranged in the arc extinguishing chamber to realize deionization.

Description

Technical Field

[0001] The utility model relates to the technical field of disconnectors, and more specifically, it relates to a disconnector with an arc extinguishing device. Background Art

[0002] A disconnector, also known as a "rotary switch", is a switching device mainly used for "isolating power sources, performing switching operations, and connecting and disconnecting small current circuits" without an arc extinguishing function; when the disconnector is in the open position, there is an insulating distance that meets the specified requirements and an obvious disconnection mark between the contacts, and when in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time.

[0003] Currently known disconnectors all include multiple layers, each layer includes a housing, and moving and static contacts carried by the housing for connection and disconnection. The moving contacts of multiple layers rotate around the same rotation axis. The moving contacts of each layer are separated from and closed with their respective corresponding static contacts, and the switching of multiple circuits can be achieved simultaneously. This type of disconnector is mainly used in DC circuits. Therefore, when the switch is disconnected, an arc will be generated, and the size of the arc increases with the increase of the switching power. Therefore, it will have a relatively large impact on the contact chamber of the switch and even cause a short circuit phenomenon. Summary of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the present utility model is to provide a disconnector with an arc extinguishing device to solve the above technical problems.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A disconnector with an arc extinguishing device includes a housing. The housing has multiple mutually spliced layer shells and a shell cover located at the top. An assembly recess for carrying a contact assembly is formed above each layer shell. The contact assembly includes a moving contact unit and a static contact member. The moving contact unit includes a disc-shaped bracket and a moving contact member provided on the disc-shaped bracket. Two arc extinguishing chambers are also formed in the assembly recess, and deionizing sheets are arranged in the arc extinguishing chambers.

[0006] The present utility model is further provided as: A baffle is formed in the arc extinguishing chamber. An installation interval for installing the deionizing sheet is formed between the baffle and the side wall of the layer shell, and exhaust holes communicating with the outside of the layer shell are opened on the inner wall of the installation interval.

[0007] The present utility model is further provided as: The deionizing sheet is formed by pressing a stainless steel wire block.

[0008] The present utility model is further provided as: Two installation slots are formed on the upper surface of the layer shell, and arc blowing magnets are arranged in the installation slots.

[0009] The utility model is further configured as follows: two abutment blocks are formed on one side of the installation slot, and guiding oblique waists are formed on the upper ends of the two abutment blocks.

[0010] The utility model is further configured as follows: the moving contact is formed by two contact sheets being laminated and stacked, both ends of the contact sheets are formed with bending sections, a contact gap adapted to the stationary contact is formed between the two bending sections, and guiding arc surfaces are formed on both sides of the bending sections.

[0011] The utility model is further configured as follows: four latching teeth are preset in the middle of one of the contact sheets, and the latching teeth are used to realize the fixed stacking of the two contact sheets.

[0012] The utility model is further configured as follows: a matching hole is formed in the middle section of the contact piece, a matching column adapted to the matching hole is formed in the middle of the disc-shaped bracket, and matching openings adapted to the bending section are formed on both sides of the disc-shaped bracket.

[0013] In summary, the utility model has the following beneficial effects: when the switch device is powered on or off, the disc-shaped bracket is controlled to rotate, the disc-shaped bracket drives the moving contact to rotate and makes the two ends of the moving contact contact or disconnect with the two corresponding static contacts, because an arc is generated when the moving contact and the static contact are released or disconnected, the arc enters the two arc extinguishing chambers for arc extinguishing, and the arc extinguishing chamber is also equipped with a built-in de-ionizing sheet to achieve de-ionization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the assembly recess of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the disc-shaped bracket of the utility model;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the movable contact member of the utility model.

[0019] Reference numerals: 1, housing; 10, layer housing; 11, housing cover; 12, assembly recess; 2, moving contact unit; 20, static contact; 21, disc-shaped bracket; 22, moving contact; 23, contact piece; 24, bending section; 25, guiding arc surface; 26, engaging teeth; 27, mating hole; 28, mating post; 29, mating opening; 3, arc extinguishing chamber; 30, deionization piece; 31, baffle; 32, installation interval; 33, exhaust hole; 4, installation slot; 40, arc blowing magnet; 41, abutting block; 42, guiding inclined waist. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 As shown, a disconnecting switch with an arc extinguishing device in an embodiment of the present invention includes a housing 1. The housing 1 has a plurality of mutually spliced layer housings 10 and a housing cover 11 located at the uppermost part. An assembly recess 12 for carrying a contact assembly is formed above each layer housing 10. The contact assembly includes a moving contact unit 2 and a static contact 20. The moving contact unit 2 includes a disc-shaped bracket 21 and a moving contact 22 provided on the disc-shaped bracket 21. Two arc extinguishing chambers 3 are also formed in the assembly recess 12, and deionization pieces 30 are provided in the arc extinguishing chambers 3.

[0022] During use, two static contacts 20 are correspondingly arranged on the top surface of each layer housing 10. A disc-shaped bracket 21 is arranged in the housing 1 at the corresponding position of each layer housing 10. The disc-shaped bracket 21 is rotatably arranged in the housing 1 and is provided with a moving contact 22;

[0023] In the initial state, both ends of the moving contact 22 are electrically connected to the two static contacts 20. At this time, the switching device is in the energized state. When the switching device is turned on and off, the disc-shaped bracket 21 is controlled to rotate. The disc-shaped bracket 21 drives the moving contact 22 to rotate and makes the two ends of the moving contact 22 contact or disconnect from the two corresponding static contacts 20. Since an arc will be generated when the moving contact 22 and the static contact 20 contact or disconnect, the arc enters the two arc extinguishing chambers 3 to achieve arc extinction. The arc extinguishing chambers 3 are also provided with deionization pieces 30 to achieve deionization.

[0024] A baffle 31 is formed in the arc extinguishing chamber 3. An installation interval 32 for installing the deionization piece 30 is formed between the baffle 31 and the side wall of the layer housing 10. An exhaust hole 33 communicating with the outside of the layer housing 10 is opened on the inner wall of the installation interval 32.

[0025] During use, stable limiting is formed through the installation section 32 for the position of the deionization sheet 30 to ensure its installation stability. The exhaust hole 33 discharges the gas generated by arc extinction outside the switchgear.

[0026] The deionization sheet 30 is formed by a stainless steel wire pressing block.

[0027] During use, the gas generated by arc extinction first passes through the deionization sheet 30 and then is discharged through the exhaust hole 33. The deionization sheet 30 is formed by a stainless steel wire pressing block, so that a plurality of irregular pores are densely distributed on the surface of the deionization sheet 30. The gas attached with charged ions passes through the pores densely distributed on the surface of the deionization sheet 30, and the charged ions in the gas are adsorbed, blocked and filtered by the deionization sheet 30, preventing the charged ions in the gas from being discharged outside the disconnector along with the gas.

[0028] Since most disconnectors are installed in cabinet-type electrical components such as inverters, taking the inverter as an example, the space of the inverter is relatively narrow and there are multiple circuit boards built in. When the gas discharged from the disconnector contains a large number of charged ions, the charged ions may attach to the surface of the circuit board or other electrical components, thus causing a short circuit or even burnout of the attached electrical components and affecting the use safety of the equipment. Therefore, blocking and filtering the charged ions through the deionization sheet 30 can effectively improve the use safety of the disconnector.

[0029] Two installation slots 4 are formed on the upper surface of the layer shell 10. The installation slots 4 are internally provided with arc-blowing magnets 40. Two abutting blocks 41 are formed on one side of the installation slots 4, and guiding beveled waists 42 are formed at the upper ends of the two abutting blocks 41.

[0030] During use, the arc-blowing magnet 40 can blow the arc and demagnetize the magnet.

[0031] Among them, a stable installation section 32 is provided for the arc-blowing magnet 40 through the installation slot 4. During installation, the arc-blowing magnet 40 is calibrated with the installation slot 4 and pushed in. The guiding beveled waist 42 provides guidance for the arc-blowing magnet 40 to enable it to accurately fall into place. In the installed state, the abutting block 41 abuts against the arc-blowing magnet 40 to make it stably exist in the installation slot 4.

[0032] The moving contact 22 is formed by laminating two contact pieces 23. Bending sections 24 are formed at both ends of the contact piece 23. A contact gap adapted to the static contact 20 is formed between the two bending sections 24. Guiding arc surfaces 25 are formed on both sides of the bending section 24. Four locking teeth 26 are preset in the middle of one of the contact pieces 23, and the locking teeth 26 are used to realize the fixed lamination of the two contact pieces 23.

[0033] During use, the moving contact 22 is composed of two contact pieces 23 laminated together. Four locking teeth 26 are preset in the middle of one of the contact pieces 23, and the lamination and splicing are realized through the four locking teeth 26.

[0034] The bent sections 24 at both ends of the two contact pieces 23 and the corresponding bent sections 24 of another contact piece 23 form a contact gap adapted to the static contact 20. When it is necessary to control the switching device to switch to the energized state, the disc-shaped bracket 21 is rotated counterclockwise to drive the moving contact 22 to rotate. The rotation of the moving contact 22 causes the two static contacts 20 to enter the two contact gaps of the moving contact 22 respectively, realizing the energization of the switching device. When the static contact 20 enters the two contact gaps, the cooperation with the two guiding arc surfaces 25 causes the two bent sections 24 to bend away from each other. When the static contact 20 is located in the contact gap, the elastic force of the two bent sections 24 clamps the static contact 20 to improve the connection stability between the moving contact 22 and the static contact 20. Further, the two guiding arc surfaces 25 enable the static contact 20 to enter the contact gap more stably, avoiding jamming due to contact errors between the two and affecting the normal energization of the switching device.

[0035] A fitting hole 27 is formed in the middle section of the contact piece 23, a fitting post 28 adapted to the fitting hole 27 is formed in the middle of the disc-shaped bracket 21, and fitting openings 29 adapted to the bent sections 24 are also formed on both sides of the disc-shaped bracket 21.

[0036] During use, through the cooperation between the fitting hole 27 and the fitting post 28 and the cooperation between the fitting opening 29 and the bent section 24, a stable limit is formed for the moving contact 22, so that the moving contact 22 can exist more stably on the disc-shaped bracket 21, and the disc-shaped bracket 21 can drive the moving contact 22 to realize on-off more stably.

[0037] At the same time, it should be noted that the terms pointed out in the present invention, such as: "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0038] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. An isolating switch with an arc extinguishing device, comprising a housing (1), the housing (1) having a plurality of mutually spliced layer shells (10) and a shell cover (11) located at the uppermost part, and an assembly recess (12) for carrying a contact assembly being formed above each layer shell (10), characterized in that: the contact assembly includes a moving contact unit (2) and a static contact piece (20), the moving contact unit (2) includes a disc-shaped bracket (21) and a moving contact piece (22) arranged on the disc-shaped bracket (21), and two arc extinguishing chambers (3) are further formed in the assembly recess (12), and a deionizing sheet (30) is arranged in the arc extinguishing chamber (3).

2. The disconnector with an arc extinguishing device according to claim 1, characterized in that: A baffle (31) is formed in the arc extinguishing chamber (3), and an installation interval (32) for installing the deionizing sheet (30) is formed between the baffle (31) and the side wall of the layer shell (10), and exhaust holes (33) communicating with the outside of the layer shell (10) are formed in the inner wall of the installation interval (32).

3. The disconnecting switch with an arc extinguishing device according to claim 2, characterized in that: The deionizing sheet (30) is formed by pressing a stainless steel wire block.

4. The disconnector with an arc extinguishing device according to claim 1, characterized in that: Two installation slots (4) are formed on the upper surface of the layer shell (10), and arc blowing magnets (40) are arranged in the installation slots (4).

5. The disconnecting switch with an arc extinguishing device according to claim 4, characterized in that: Two abutting blocks (41) are formed on one side of the installation slot, and guiding bevel waists (42) are formed at the upper ends of the two abutting blocks (41).

6. The disconnecting switch with an arc extinguishing device according to claim 1, characterized in that: The moving contact piece (22) is formed by laminating two contact pieces (23) in a fitting manner, bending sections (24) are formed at both ends of the contact piece (23), a contact gap adapted to the static contact piece (20) is formed between the two bending sections (24), and guiding arc surfaces (25) are formed on both sides of the bending section (24).

7. The disconnecting switch with an arc extinguishing device according to claim 6, characterized in that: Four engaging teeth (26) are preset in the middle of one of the contact pieces (23), and the engaging teeth (26) are used to realize the fixed lamination of the two contact pieces (23).

8. The disconnector with an arc extinguishing device according to claim 7, characterized in that: A fitting hole (27) is formed in the middle section of the contact piece (23), a fitting post (28) adapted to the fitting hole (27) is formed in the middle of the disc-shaped bracket (21), and fitting openings (29) adapted to the bending section (24) are further formed on both sides of the disc-shaped bracket (21).

Images