Enclosed isolating switch

Abstract

The utility model provides a closed disconnecting switch, which comprises a first insulating pillar, a second insulating pillar and a knife board which is arranged between the first insulating pillar and the second insulating pillar and can be used for opening or closing, wiring boards are connected to two sides of the knife board close to the end, one end of the knife board is hinged to the wiring boards, and the other end of the knife board can be opened or closed with the wiring boards. The connecting positions of the knife board and the wiring board are sleeved with supporting pieces, the knife board and the supporting pieces are externally provided with insulating protective covers made of silicon rubber materials, and the isolating switch can play a role in sealing electrified metal parts.

Description

Technical Field

[0001] The utility model relates to the technical field of disconnectors, and particularly relates to a closed disconnector. Background Art

[0002] A disconnector is a switch device mainly used for "isolating power sources, performing switching operations, and connecting and disconnecting small-current circuits". 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; 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] The disconnector consists of a first insulating column, a second insulating column, and a knife plate arranged between the two and capable of opening and closing. In the prior art, the knife plate is charged with high voltage and is exposed to the outside during use, making it easy for birds, airborne objects, tree branches, etc. to attach to these high-voltage charged metal components, easily causing a short circuit in the circuit and seriously affecting the safe and reliable operation of the power grid. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that a short circuit is caused by birds, etc. attaching to these high-voltage charged metal components due to the exposure of the knife plate to the outside, so as to provide a closed disconnector that avoids short circuits.

[0005] To this end, the utility model provides a closed disconnector, which includes a first insulating column, a second insulating column, and a knife plate arranged between the two and capable of opening or closing. Wiring boards are connected to both sides of the knife plate near the ends. One end of the knife plate is hinged to the wiring board, and the other end can be opened or closed with the wiring board. Support members are sleeved at the connection between the knife plate and the wiring board, and an insulating protective cover made of silicone rubber material is arranged outside the knife plate and the support members.

[0006] Further: The knife plate includes an upper connection plate arranged in a "T" shape and a lower connection plate vertically arranged below the upper connection plate. The support member wraps the connection between the knife plate and the wiring board, and the insulating protective cover wraps the outside of the support member.

[0007] Further: The knife plate has an open state and a closed state. A buckling component for controlling the opening or closing of the knife plate is arranged at the connection between the knife plate and the wiring board. The buckling component includes a lock arranged on one side of the circuit board or the knife plate and a buckle arranged on the other side and adapted to the lock. A pull ring is arranged above the buckle. When the knife plate is in the closed state, the buckle is clamped inside the lock.

[0008] Further: The pull ring includes an unlocking end arranged in an annular structure and an abutting end abutting against the insulating protective cover. An activity cavity for the buckle to swing is arranged between the unlocking end and the abutting end.

[0009] Further: The buckle is provided with a barb, the lock catch is provided with a card slot for the barb to be inserted into, and a guiding inclined surface for guiding the barb into the card slot is arranged above the lock catch.

[0010] Further: A circular ring is arranged at the unlocking end, and the inner radius of the circular ring is greater than or equal to 42 mm.

[0011] Further: The insulating protective cover includes an insulating wrapping board wrapped around the outside of the lower connecting plate and an insulating cover board wrapped around the outside of the upper connecting plate.

[0012] Further: A contact component is further arranged between the knife board and the wiring board. The contact component includes a first contact and a second contact arranged oppositely and a connecting part arranged between the two. A limiting part for fixing the distance between the first contact and the second contact is arranged between the first contact and the second contact.

[0013] Further: The limiting part includes a limiting board wrapped around the outside of the first contact and the second contact and a limiting pin penetrating through the limiting board and between the first contact and the second contact.

[0014] Further: A wire connecting sleeve is sleeved outside the wiring board. The wire connecting sleeve is provided with a through hole for the wire to penetrate into and be connected with the wiring board. The wire connecting sleeve is made of silicone rubber material.

[0015] The technical solution of the present utility model has the following advantages:

[0016] 1. A closed disconnector provided by the present utility model, compared with the prior art, in this embodiment, an insulating protective cover made of silicone rubber material is arranged on the outer side surface of the knife board. Since the silicone rubber material is relatively soft and its supporting force is not enough to support the knife board, a support member made of a hard material is arranged between the knife board and the first insulating pillar and the second insulating pillar. The support member can be made of materials such as epoxy resin or bulk molding compound. By sleeving the support member between the knife board and the first insulating pillar and the second insulating pillar, the supporting strength of the knife board and the first insulating pillar and the second insulating pillar can be increased. And through the arrangement of the insulating protective cover, the charged metal parts such as the knife board can be wrapped, avoiding that during the working process, due to birds, airborne floating objects, tree branches, etc. falling on the charged metal parts, resulting in the short circuit or failure of the disconnector, and at the same time, it can also avoid the operator directly contacting the charged part, greatly reducing the electric shock risk and improving the safety of the product.

[0017] 2. The enclosed disconnect switch provided by the utility model, the insulation protection cover and the first and second insulation pillars can be formed separately or integrally injection molded. In the state of integral injection molding, it is convenient for installation. When the insulation protection cover is formed separately from the first and second insulation pillars, the insulation protection cover can be adapted to different insulation pillars, and there is no need to open multiple sets of molds, effectively saving costs. To meet the requirements of electrical conductivity, the knife plate can be made of copper material. To enhance the strength of the knife plate and prevent the knife plate from deforming, the knife plate is set into a "T" - shaped structure. Through the combined setting of the upper connecting plate and the lower connecting plate, the anti - deformation ability of the knife plate is increased, thereby reducing the deformation force generated during the use of the knife plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is the overall structural schematic diagram of the disconnect switch;

[0020] Figure 2 is the schematic diagram of a partial structure of the disconnect switch;

[0021] Figure 3 is the cross - sectional structural schematic diagram of the disconnect switch;

[0022] Figure 4 is Figure 3 the enlarged view of part A in

[0023] Figure 5 is the structural schematic diagram of the snap - fit component and the knife plate in the disconnect switch;

[0024] Figure 6 is the structural schematic diagram of the limiting part.

[0025] Description of the reference numerals:

[0026] 1. First insulating support; 2. Second insulating support; 3. Knife plate; 31. Upper connecting plate; 32. Lower connecting plate; 4. Wiring plate; 41. Wire connecting sleeve; 42. Perforation; 5. Support member; 6. Insulating protective cover; 61. Insulating wrapping plate; 62. Insulating cover plate; 7. Buckling assembly; 71. Lock; 72. Buckle; 73. Pull ring; 731. Unlocking end; 732. Abutting end; 74. Movable cavity; 75. Barbs; 76. Card slot; 78. Ring; 8. Contact assembly; 81. First contact; 82. Second contact; 83. Connecting portion; 9. Limiting member; 91. Limiting plate; 92. Limiting pin. Detailed implementation manners

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] Embodiment

[0032] This embodiment provides a closed-type disconnector, including a first insulating support 1, a second insulating support 2, and a blade 3 disposed therebetween and capable of opening or closing. Connecting plates 4 are connected to both sides of the blade 3 near the ends. One end of the blade 3 is hinged to the connecting plate 4, and the other end can be opened or closed with the connecting plate 4. Support members 5 are sleeved at the connection between the blade 3 and the connecting plate 4. An insulating protective cover 6 made of silicone rubber material is disposed outside the blade 3 and the support members 5.

[0033] The specific improvement is as follows: As Figures 1 - 4 shown, a blade 3 is disposed between the first insulating support 1 and the second insulating support 2. The opening and closing of the disconnector are realized by the rotation of the blade 3. The first insulating support 1 and the second insulating support 2 are generally made of silicone rubber. Compared with the prior art, in this embodiment, an insulating protective cover 6 made of silicone rubber material is disposed on the outer side of the blade 3. Since the silicone rubber material is relatively soft and its supporting force is not sufficient to support the blade 3, support members 5 made of hard materials are disposed between the blade 3 and the first insulating support 1 and the second insulating support 2. The support members 5 can be made of materials such as epoxy resin or bulk molding compound. By sleeving the support members 5 between the blade 3 and the first insulating support 1 and the second insulating support 2, the supporting strength of the blade 3 and the first insulating support 1 and the second insulating support 2 can be increased. And through the setting of the insulating protective cover 6, the live metal parts such as the blade 3 can be wrapped, preventing birds, airborne objects, branches, etc. from falling on the live metal parts during operation, thus avoiding short circuits or failures of the disconnector, and at the same time, it can also prevent operators from directly contacting the live parts, greatly reducing the risk of electric shock and improving the safety of the product.

[0034] Based on the above embodiment: The blade 3 includes an upper connecting plate 31 arranged in a "T" - shaped structure and a lower connecting plate 32 vertically disposed below the upper connecting plate 31. The support member 5 wraps the connection between the blade 3 and the connecting plate 4, and the insulating protective cover 6 wraps the outside of the support member 5.

[0035] The specific improvement is as follows: As Figure 5As shown, the insulating protective cover 6 and the first insulating support 1 and the second insulating support 2 can be formed separately or integrally injection-molded. The integrally injection-molded state is convenient for installation. When the insulating protective cover 6 is formed separately from the first insulating support 1 and the second insulating support 2, the insulating protective cover 6 can be adapted to different insulating supports, and there is no need to open multiple sets of molds, effectively saving costs. To meet the requirements of electrical conductivity, the knife plate 3 can be made of copper material. To enhance the strength of the knife plate 3 and prevent the knife plate 3 from deforming, the knife plate 3 is set in a "T" structure. Through the combined setting of the upper connecting plate 31 and the lower connecting plate 32, the anti-deformation ability of the knife plate 3 is increased, thereby reducing the deformation force generated by the knife plate 3 during use.

[0036] Based on the above embodiments: The knife plate 3 has a tripping state and a closing state. A buckling component 7 for controlling the closing or tripping of the knife plate 3 is provided at the connection between the knife plate 3 and the wiring board 4. The buckling component 7 includes a lock catch 71 provided on one side of the circuit board or the knife plate 3, and a buckle 72 provided on the other side and adapted to the lock catch 71. A pull ring 73 is provided above the buckle 72. When the knife plate 3 is in the closing state, the buckle 72 is clamped inside the lock catch 71.

[0037] The above specific improvement is as Figure 1 and Figure 2 As shown, to enable the knife plate 3 to maintain the closing state with the first insulating support 1, a lock catch 71 is provided on the insulating protective cover 6 on the knife plate 3, and then a buckle 72 is provided on the insulating protective cover 6 outside the knife plate 3. During operation, generally, a live-line tool needs to pass through the pull ring 73 to drive the rotation of the knife plate 3. When closing is required, the knife plate 3 is driven to rotate towards the side close to the lock catch 71, so that the buckle 72 is snapped into the lock catch 71. When tripping is required, an external tool is inserted into the pull ring 73, and the knife plate 3 is driven to rotate towards the other side, so that the buckle 72 is separated from the lock catch 71 to achieve tripping.

[0038] Based on the above embodiments: The pull ring 73 includes an unlocking end 731 arranged in a ring structure and an abutting end 732 abutting against the insulating protective cover 6. An activity cavity 74 for the buckle 72 to swing is provided between the unlocking end 731 and the abutting end 732.

[0039] The above specific improvement is as Figure 4As shown, the pull ring 73 includes an unlocking end 731 and an abutting end 732. When closing the switch, the buckle 72 will rotate towards the side close to the lock catch 71. When the lower end surface of the abutting end 732 abuts against the upper end surface of the insulating protective cover 6, the buckle 72 can still swing freely within the range of the movable cavity 74. Therefore, during the process of the buckle 72 being inserted into the lock catch 71, the buckle 72 can have a certain elastic buffer force, and it will not be forced into the lock catch 71 due to the position of the buckle 72 being restricted, which better protects the buckle 72 and improves the service life of the buckle 72.

[0040] Based on the above embodiment: A barb 75 is provided on the buckle 72, a slot 76 for the barb 75 to be inserted into is provided in the lock catch 71, and a guiding inclined surface for guiding the barb 75 into the slot 76 is provided above the lock catch 71.

[0041] The above specific improvement is as follows: As Figure 4 and Figure 6 shown, through the setting of the barb 75 and the slot 76, the knife plate 3 can be kept in the closed state, and through the setting of the guiding inclined surface, the barb 75 can be effectively guided into the slot 76.

[0042] Based on the above embodiment: A circular ring 78 is provided at the unlocking end 731, and the inner radius of the circular ring 78 is greater than or equal to 42 mm.

[0043] The above specific improvement is as follows: As Figure 5 shown, in order to enable the live line stick to quickly pass through the circular ring 78, the radius of the circular ring 78 can be set to be greater than or equal to 42 mm, which is convenient for the live line stick to quickly pass through.

[0044] Based on the above embodiment: The insulating protective cover 6 includes an insulating wrapping plate 61 wrapped around the outer part of the lower connecting plate 32 and an insulating cover plate 62 wrapped around the outer part of the upper connecting plate 31.

[0045] The above specific improvement is as follows: As Figure 2 and Figure 5 shown, in order to fully wrap the knife plate 3 and avoid restricting the opening and closing movement of the knife plate 3, an insulating wrapping plate 61 is sleeved outside the lower connecting plate 32, and an insulating cover plate 62 is sleeved outside the upper connecting plate 31. When the knife plate 3 is in the closed state, the insulating wrapping plate 61 and the insulating cover plate 62 will wrap around the outside of the knife plate 3 to prevent external operators or birds, etc. from directly contacting the knife plate 3, thus avoiding danger. When the knife plate 3 is in the open state, the insulating wrapping plate 61 and the insulating cover plate 62 will rotate together with the upper connecting plate 31 and the lower connecting plate 32 to achieve opening.

[0046] On the basis of the above embodiments: A contact assembly 8 is further provided between the knife plate 3 and the wiring board 4. The contact assembly 8 includes a first contact 81 and a second contact 82 arranged opposite to each other, and a connecting portion 83 disposed therebetween. A limiting member 9 for fixing the distance between the first contact 81 and the second contact 82 is provided between the first contact 81 and the second contact 82.

[0047] On the basis of the above embodiments: The limiting member 9 includes a limiting plate 91 wrapped around the outer parts of the first contact 81 and the second contact 82, and a limiting pin 92 passing through the limiting plate 91 and between the first contact 81 and the second contact 82.

[0048] The above specific improvement is as follows: As Figure 6 shown, when the knife plate 3 is closed, the lower connecting plate 32 will be clamped between the first contact 81 and the second contact 82 and contact with the first contact 81 and the second contact 82 to form an energized state. Both the first contact 81 and the second contact 82 are formed by punching and forging T2 copper. Through the arrangement of the connecting portion 83 of the first contact 81 and the second contact 82, the contact area between the lower connecting plate 32 and the contact assembly 8 can be increased, and the current flow can be increased. During use, when the distance between the first contact 81 and the second contact 82 and the lower connecting plate 32 is too large, the resistance will increase, resulting in a decrease in the passing current. When the distance between the first contact 81 and the second contact 82 and the lower connecting plate 32 is too small, it will be difficult to close the switch. To solve this technical problem, a limiting member 9 for positioning the distance between the first contact 81 and the second contact 82 is provided outside the first contact 81 and the second contact 82. The limiting member 9 includes a limiting plate 91 wrapped around the outer parts of the first contact 81 and the second contact 82, and a limiting pin 92 is fixed outside the limiting plate 91, thereby fixing the distance between the first contact 81 and the second contact 82, and preventing the first contact 81 and the second contact 82 from generating displacement after the knife plate 3 is switched on and off multiple times, resulting in a gradual increase in the distance between the first contact 81 and the second contact 82.

[0049] On the basis of the above embodiments: A wire connection sleeve 41 is sleeved outside the wiring board 4. The wire connection sleeve 41 has a through hole 42 for the wire to penetrate and be connected to the wiring board 4. The wire connection sleeve 41 is made of silicone rubber material.

[0050] The above specific improvement is as follows: In the prior art, most wires are aluminum wires, while the wiring board 4 is made of copper material. However, there will be a thermal reaction during the transition between copper and aluminum. To avoid this phenomenon, the wiring board 4 is made of aluminum material to avoid the risk of copper-aluminum transition. To prevent operators from directly contacting the wiring board 4, an insulating silicone rubber material is provided outside the wiring board 4. When connecting the wire, first fix the wire on the wiring board 4, and then wrap the wire connection sleeve 41 around the outside of the wiring board 4 to form an insulating protection.

[0051] Obviously, the above embodiments are merely examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the creation of this utility model.

Claims

1. A closed isolator, characterized in that: The first insulating support (1), the second insulating support (2), and a knife plate (3) disposed between the two and capable of opening or closing. Connection plates (4) are connected to both sides of the knife plate (3) near the ends. One end of the knife plate (3) is hinged to the connection plate (4), and the other end can be opened or closed with the connection plate (4). Support members (5) are sleeved at the connection positions of the knife plate (3) and the connection plate (4). An insulating protective cover (6) made of silicone rubber material is disposed outside the knife plate (3) and the support members (5).

2. The enclosed disconnecting switch according to claim 1, wherein: The knife plate (3) includes an upper connection plate (31) arranged in a "T" shape and a lower connection plate (32) vertically arranged below the upper connection plate (31). The support member (5) wraps the connection position of the knife plate (3) and the connection plate (4), and the insulating protective cover (6) wraps outside the support member (5).

3. The enclosed disconnecting switch according to claim 2, characterized in that: The knife plate (3) has an open state and a closed state. A buckling component (7) for controlling the opening or closing of the knife plate (3) is arranged at the connection position of the knife plate (3) and the connection plate (4). The buckling component (7) includes a lock catch (71) arranged on one side of the circuit board or the knife plate (3), and a buckle (72) arranged on the other side and adapted to the lock catch (71). A pull ring (73) is arranged above the buckle (72). When the knife plate (3) is in the closed state, the buckle (72) is clamped inside the lock catch (71).

4. The enclosed isolator according to claim 3, characterized in that: The pull ring (73) includes an unlocking end (731) arranged in a ring shape and an abutting end (732) abutting against the insulating protective cover (6). An activity cavity (74) for the buckle (72) to swing is arranged between the unlocking end (731) and the abutting end (732).

5. The enclosed disconnecting switch according to claim 4, characterized in that: A barb (75) is arranged on the buckle (72), a card slot (76) for the barb (75) to be inserted into is arranged inside the lock catch (71), and a guiding inclined surface for guiding the barb (75) into the card slot (76) is arranged above the lock catch (71).

6. The enclosed disconnector according to claim 4, characterized in that: A circular ring (78) is arranged at the unlocking end (731), and the inner radius of the circular ring (78) is greater than or equal to 42 mm.

7. A closed disconnector according to claim 6, characterized in that: The insulating protective cover (6) includes an insulating wrapping plate (61) wrapping outside the lower connection plate (32) and an insulating cover plate (62) wrapping outside the upper connection plate (31).

8. The enclosed isolator according to claim 7, characterized in that: A contact component (8) is further arranged between the knife plate (3) and the connection plate (4). The contact component (8) includes a first contact (81), a second contact (82) arranged oppositely, and a connecting portion (83) arranged between the two. A limiting member (9) for fixing the distance between the first contact (81) and the second contact (82) is arranged between the first contact (81) and the second contact (82).

9. The enclosed disconnecting switch according to claim 8, wherein: The limiting member (9) includes a limiting plate (91) wrapping outside the first contact (81) and the second contact (82), and a limiting pin (92) passing through the limiting plate (91) and between the first contact (81) and the second contact (82).

10. A closed isolator according to any one of claims 1 - 9, characterized in that: The external of the wiring board (4) is sleeved with a wire connection sleeve (41). The wire connection sleeve (41) has a perforation (42) for the wire to penetrate and connect with the wiring board (4). The wire connection sleeve (41) is made of silicone rubber material.

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