CN111933467A

CN111933467A - Small fuse type isolating switch

Info

Publication number: CN111933467A
Application number: CN202010941385.7A
Authority: CN
Inventors: 刘德先
Original assignee: Zhejiang Grl Electric Co ltd
Current assignee: Zhejiang Grl Electric Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2020-11-13

Abstract

The invention provides a small fuse type isolating switch, comprising: the contact terminals are arranged on the base, one ends of the contact terminals are provided with elastic contact head parts which can be clamped with the fuse core, the other ends of the contact terminals are connected with the wiring terminals, and a first partition plate is arranged between every two adjacent wiring terminals; the second partition plate is arranged between the two adjacent contacts, the left end face of the second partition plate exceeds the elastic contact part, and the right end face of the second partition plate extends into an inner cavity formed by the two adjacent first partition plates. Through the extension of the end face length of the two sides of the second partition plate, the creepage distance and the electric clearance between two adjacent contacts are increased, the rated punching withstand voltage and the rated insulation voltage of a product are further improved, and the use requirements of customers on certain special occasions are met.

Description

Small fuse type isolating switch

Technical Field

The invention relates to the technical field of electrical switches, in particular to a small fuse type isolating switch.

Background

The isolating switch is usually matched with a fuse for use, has two functions of load breaking and isolating, can be additionally provided with the fuse for overload and short-circuit protection at each pole, fully utilizes the protection characteristic curve of the fuse, realizes the protection of equipment in cables and lines, and provides an obvious disconnection point for ensuring the personal safety of workers during maintenance.

As shown in fig. 11 and 12, the conventional small fuse type disconnecting switch includes a base 01, a plurality of contacts 02 disposed on the base, and connection terminals 03 connected to the contacts 02, a first partition 04 is disposed between two adjacent connection terminals 03, and a second partition 05 is disposed between two adjacent contacts 02, wherein a left end surface 051 of the second partition 05 is flush with one side end surface of the contact 02, and a right end surface 052 of the second partition is flush with the first partition 04.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the small fuse type disconnecting switch in the prior art has low electrical parameters and can not meet the use requirements of customers in some special occasions, thereby providing the small fuse type disconnecting switch with high electrical parameters.

The invention provides a small fuse type isolating switch, which comprises contacts and a second partition plate, wherein a plurality of contacts are arranged on a base, one end of each contact is provided with an elastic contact part which can be clamped with a fusible core, the other end of each contact is connected with a connecting terminal, and the first partition plate is arranged between every two adjacent connecting terminals; the second partition plate is arranged between every two adjacent contacts, the left end face of the second partition plate exceeds the elastic contact part, and the right end face of the second partition plate extends into an inner cavity formed by the two adjacent first partition plates.

The contact structure comprises a base, wherein two rows of contacts are arranged on the left side and the right side of the base respectively, a plurality of first screws are arranged between the two rows of contacts, and screw insulation sleeves arranged around the first screws are arranged on the base.

The screw insulation cover has two, two the screw insulation cover passes through the connecting plate and links to each other, the connecting plate pass through the elastic hook structure with the base links to each other, the elastic hook structure is including locating hanging hole on the base, and locate on the connecting plate can with the elastic hook that the hanging hole hook is connected.

The base is provided with a connecting shaft, the outer wall of the base is provided with a rotating arm which can be connected with the connecting shaft, and the rotating arm is provided with a slot which is connected with the connecting shaft in an adaptive manner.

The cover plate is in a closed state and in an open state, the cover plate and the base are obliquely arranged at a certain angle, the rotating arm is U-shaped, and a stop block which can be matched with the U-shaped rotating arm to stop the rotating arm so that the cover plate can keep in a set open state is arranged on the outer wall of the base.

The cover plate is connected with the base in a buckling mode through a buckling platform structure, the buckling platform structure comprises a matching hole formed in the base and a buckling platform which is arranged on the cover plate and can be connected with the matching hole in a buckling mode.

The cover plate is provided with a plurality of mounting pieces suitable for mounting the fusible cores, and a third partition plate is arranged between every two adjacent fusible cores.

The top of the cover plate is provided with a panel, and the side surface of the cover plate and the panel are provided with heat dissipation holes.

The base is located connecting axle one side binding post's top is equipped with the backplate, the backplate pass through buckle structure with base fixed connection, buckle structure is including locating oblique knot on the base hangs the platform, and locates on the backplate can with the oblique knot that hangs the platform lock and be connected to one side detains.

The backplate still through location structure with the base location is connected, location structure is including locating two constant head tanks of base both sides, and locate on the backplate can with constant head tank adaptation connection's locating piece.

The contact is fixedly connected with the base through a second screw, and a blind hole for the second screw to extend into is formed in the base.

The technical scheme of the invention has the following advantages:

1. according to the small fuse type disconnecting switch provided by the invention, the second partition plate is arranged between two adjacent contacts, the left end face of the second partition plate exceeds the elastic contact part, the right end face of the second partition plate extends into the inner cavity formed by two adjacent first partition plates, and the length of the end faces at two sides of the second partition plate is lengthened, so that the creepage distance and the electric gap between two adjacent contacts are increased, and the rated punching withstand voltage and the rated insulation voltage of a product are further improved.

2. According to the small fuse type isolating switch provided by the invention, the plurality of first screws are arranged between the two rows of contacts, the screw insulating sleeve arranged around the first screws is arranged on the base, the creep distance and the electric clearance between the first screws and the contacts can be increased by the screw insulating sleeve, and the safety performance is higher.

3. The small fuse type isolating switch provided by the invention has the advantages that the number of the screw insulating sleeves is two, the two screw insulating sleeves are connected through the connecting plate, the connecting plate is connected with the base through the elastic hook structure, the elastic hook structure comprises the hanging hole arranged on the base and the elastic hook which is arranged on the connecting plate and can be hooked and connected with the hanging hole, and the elastic hook and the hanging hole which are matched with each other have the advantages of simple structure and rapidness and convenience in disassembly and assembly.

4. According to the small fuse type isolating switch, the connecting shaft is arranged on the outer wall of the base, the rotating arm capable of being connected with the connecting shaft is arranged on the cover plate, the slot adaptive to the connecting shaft is formed in the rotating arm, and compared with the mode that the rotating arm of the cover plate in the prior art is arranged in the base, and an avoiding hole for the rotating arm to move needs to be formed in a base bottom plate of the base.

5. The invention provides a small fuse type isolating switch, wherein a cover plate has a closed state and an open state which is obliquely arranged at a certain angle with a base, a rotating arm is U-shaped, and a stop block which can be matched with the U-shaped rotating arm to stop and enable the cover plate to keep the set open state is arranged on the outer wall of the base. The cover plate is not easy to separate from the base, the fusible core is convenient to replace, the safety of a user and a switch can be guaranteed, and the cover plate is prevented from directly falling after the switch is opened.

6. According to the small fuse type isolating switch provided by the invention, the cover plate is connected with the base in a buckling mode through the buckling platform structure, the buckling platform structure comprises the matching hole formed in the base and the buckling platform which is arranged on the cover plate and can be connected with the matching hole in a buckling mode, the buckling platform and the matching hole which are matched with each other have the advantage of simple structure, the cover plate and the base are not prone to separation and falling off in different placement states when a fuse core is not installed in the switch, and the reliability is higher.

7. According to the small fuse type disconnecting switch provided by the invention, the cover plate is provided with the plurality of mounting parts suitable for mounting the fusible cores, the third partition plate is arranged between two adjacent fusible cores, and when the cover plate and the base are in a buckling state, the third partition plate can be inserted between two adjacent contacts, so that the creepage distance and the electric gap between the two adjacent contacts are further increased, and the safety performance is improved.

8. The invention provides a small fuse type isolating switch.A rear protective plate is arranged above a wiring terminal on one side of a connecting shaft on a base and is fixedly connected with the base through a buckle structure, and the buckle structure comprises an inclined buckle hanging table arranged on the base and an inclined buckle which is arranged on the rear protective plate and can be buckled and connected with the inclined buckle hanging table. The backplate can shelter from protection binding post, guarantees switch housing protection level IP30, and adopts buckle connected mode, and the dismouting is swift convenient.

9. According to the small fuse type isolating switch provided by the invention, the contact is fixedly connected with the base through the second screw, the blind hole for the second screw to extend into is formed in the base, and compared with the mode that the second screw penetrates through the base bottom plate in the prior art and needs to be sealed through a glue filling process in order to prevent electric leakage, the process is simplified, and the safety performance is higher.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of a miniature fused disconnect switch of the present invention in an open state;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a perspective view of the base;

FIG. 4 is an exploded view of the back cover plate, screw insulator sleeve and base;

FIG. 5 is a top view of FIG. 3;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 5;

figure 9 is a perspective view of the miniature fused disconnect switch in a closed state;

FIG. 10 is a cross-sectional view of FIG. 9;

FIG. 11 is a perspective view of a small and medium fuse-type isolator switch of the prior art;

fig. 12 is a top view of the base of fig. 11.

Description of reference numerals: 01. a base; 02. a contact; 03. a wiring terminal; 04. a first separator; 05. a second separator; 051. a left end face; 052. a right end face;

1. a base; 11. a first separator; 12. a second separator; 121. a left end face; 122. a right end face; 13. hanging holes; 14. a connecting shaft; 15. a stopper; 16. a mating hole; 17. a diagonal buckle hanging table; 18. positioning a groove; 19. blind holes; 2. a contact; 21. an elastic contact portion; 22. a second screw; 3. a fusible core; 4. a wiring terminal; 5. a first screw; 6. a screw insulating sleeve; 61. a connecting plate; 62. an elastic hook; 7. a cover plate; 71. a rotating arm; 72. a slot; 73. buckling a platform; 74. a mounting member; 75. a third partition plate; 76. a panel; 77. heat dissipation holes; 8. a rear guard plate; 81. obliquely buckling; 82. and (5) positioning the blocks.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a miniature fuse-type disconnector, which comprises a base 1, a cover plate 7 and a backplate 8, as shown in fig. 1 and 9.

The left side and the right side of the base 1 are respectively provided with two rows of the contacts 2, as shown in fig. 3-5, a plurality of first screws 5 are arranged between the two rows of the contacts 2, screw insulation sleeves 6 which are arranged around the first screws 5 are arranged on the base 1, the number of the screw insulation sleeves 6 is two, the two screw insulation sleeves 6 are connected through a connecting plate 61, the connecting plate 61 is connected with the base 1 through an elastic hook structure, as shown in fig. 6, the elastic hook structure comprises a hanging hole 13 arranged on the base 1 and an elastic hook 62 arranged on the connecting plate 61 and capable of being connected with the hanging hole 13 in a hooked mode. The contact 2 is fixedly connected with the base 1 through a second screw 22, as shown in fig. 7, a blind hole 19 into which the second screw 22 extends is formed on the base 1.

Every row all is equipped with three contact 2, as shown in fig. 5, the one end of contact 2 is equipped with the elastic contact portion 21 that can with the 3 joints of fusible core, and the other end links to each other with binding post 4, adjacent two be equipped with first baffle 11 between binding post 4, adjacent two be equipped with second baffle 12 between the contact 2, the left end face 121 of second baffle 12 surpasss elastic contact portion 21 sets up, and its right-hand member face 122 stretches into by adjacent two in the inner chamber that first baffle 11 formed.

The cover plate 7 is rotatably installed on the base 1, as shown in fig. 2, a connecting shaft 14 is arranged on the outer wall of the base 1, a rotating arm 71 capable of being connected with the connecting shaft 14 is arranged on the cover plate 7, and a slot 72 in adaptive connection with the connecting shaft 14 is arranged on the rotating arm 71. The cover plate 7 has a closed state and an open state which is obliquely arranged at a certain angle with the base 1, the rotating arm 71 is U-shaped, and a stop block 15 which can be matched with the U-shaped rotating arm 71 to stop the U-shaped rotating arm 71 so as to enable the cover plate 7 to keep the set open state is arranged on the outer wall of the base 1. As shown in fig. 10, the cover plate 7 is connected to the base 1 by a fastening structure, which includes a matching hole 16 formed on the base 1 and a fastening platform 73 formed on the cover plate 7 and capable of being fastened to the matching hole 16. As shown in fig. 1, a plurality of mounting members 74 adapted to mount the fusible core 3 are provided on the bottom surface of the cover plate 7, and a third partition plate 75 is provided between two adjacent fusible cores 3. As shown in fig. 9, a panel 76 is disposed on the top of the cover plate 7, and heat dissipation holes 77 are disposed on both the side surface of the cover plate 7 and the panel 76.

Backplate 8 locates binding post 4 top, as shown in fig. 8 and 9, backplate 8 through buckle structure with base 1 fixed connection, buckle structure is including locating oblique knot on the base 1 hangs platform 17, and locates on backplate 8 can with the oblique knot 81 of hanging platform 17 lock connection is detained to one side. The rear protective plate 8 is also connected with the base 1 in a positioning manner through a positioning structure, and the positioning structure comprises two positioning grooves 18 arranged on two sides of the base 1 and a positioning block 82 arranged on the rear protective plate 8 and capable of being in adaptive connection with the positioning grooves 18.

According to the small fuse type disconnecting switch provided by the invention, the second partition plate 12 is arranged between two adjacent contacts 2, the left end surface 121 of the second partition plate 12 is arranged beyond the elastic contact part 21, and the right end surface 122 of the second partition plate 12 extends into an inner cavity formed by two adjacent first partition plates 11, and the creepage distance and the electric gap between two adjacent contacts 2 are increased by lengthening the end surfaces at two sides of the second partition plate 12, so that the rated punching withstand voltage and the rated insulation voltage of a product are improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A miniature fused disconnect switch comprising:

the fuse core structure comprises a plurality of contacts (2) arranged on a base (1), wherein one end of each contact (2) is provided with an elastic contact part (21) which can be clamped with a fuse core (3), the other end of each contact is connected with a connecting terminal (4), and a first partition plate (11) is arranged between every two adjacent connecting terminals (4);

the second partition plate (12) is arranged between the two adjacent contacts (2), the left end face (121) of the second partition plate (12) exceeds the elastic contact part (21) and the right end face (122) of the second partition plate extends into an inner cavity formed by the two adjacent first partition plates (11).

2. A miniature fused disconnect switch according to claim 1 wherein the base (1) is provided with two rows of said contacts (2) on each of the left and right sides thereof, a plurality of first screws (5) being provided between the two rows of said contacts (2), and a screw insulating sleeve (6) being provided on the base (1) around said first screws (5).

3. A miniature fused disconnect switch as defined in claim 2 wherein there are two of said screw insulating sleeves (6), two of said screw insulating sleeves (6) being connected by a connecting plate (61), said connecting plate (61) being connected to said base (1) by a resilient hook structure comprising a hanging hole (13) formed in said base (1) and a resilient hook (62) formed in said connecting plate (61) and adapted to be hooked to said hanging hole (13).

4. A miniature fuse-type disconnector according to any of claims 1-3, further comprising a cover plate (7) rotatably connected to the base (1), wherein the base (1) is provided with a connecting shaft (14) on an outer wall thereof, the cover plate (7) is provided with a rotating arm (71) capable of being connected to the connecting shaft (14), and the rotating arm (71) is provided with a slot (72) adapted to the connecting shaft (14).

5. A miniature fused disconnect switch as defined in claim 4 wherein the cover (7) has a closed position and an open position angularly displaced from the base (1), the pivoted arm (71) being U-shaped, and the base (1) having an outer wall provided with a stop (15) engageable with the U-shaped pivoted arm (71) to stop the cover (7) in the open position.

6. A miniature fused disconnect switch as defined in claim 5 wherein the cover (7) is snap-fit to the base (1) by means of a snap-fit structure comprising a mating hole (16) in the base (1) and a snap-fit boss (73) in the cover (7) snap-fit to the mating hole (16).

7. A miniature fused disconnect switch as defined in claim 6 wherein said cover plate (7) is provided with a plurality of mounting members (74) adapted to mount said fusible core (3), and a third spacer (75) is provided between adjacent ones of said fusible cores (3).

8. A miniature fused disconnect switch of claim 7 wherein the top of the cover plate (7) is provided with a face plate (76), and heat dissipation holes (77) are provided on both the side of the cover plate (7) and the face plate (76).

9. A miniature fuse-type isolating switch according to claim 8, wherein a rear protective plate (8) is arranged on the base (1) above the connecting terminal (4) on one side of the connecting shaft (14), the rear protective plate (8) is fixedly connected with the base (1) through a buckle structure, and the buckle structure comprises an inclined buckle hanging table (17) arranged on the base (1) and an inclined buckle (81) arranged on the rear protective plate (8) and capable of being buckled and connected with the inclined buckle hanging table (17).

10. A miniature fused disconnect switch as defined in claim 9, wherein the backplate (8) is further connected to the base (1) by a locating structure, the locating structure comprising two locating slots (18) provided on both sides of the base (1), and a locating block (82) provided on the backplate (8) and adapted to connect with the locating slots (18).

11. A miniature fused disconnect switch as defined in claim 1 wherein the contact (2) is fixedly attached to the base (1) by a second screw (22), the base (1) having a blind bore (19) formed therein into which the second screw (22) extends.