Combined fuse type disconnecting switch

Abstract

The utility model discloses a combined fuse type disconnecting switch which structurally comprises at least one disconnecting switch unit, each disconnecting switch unit comprises an installation shell and a fuse, the two ends of the inner side of the installation shell are fixedly provided with wiring terminals used for being connected with the fuse, and the installation shell comprises a shell body and a cover plate used for sealing the shell body. The shell and the cover plate are connected through a hinge arm, assembling concave positions used for containing the hinge arm are formed in the left side and the right side of the mounting shell, and the hinge arm comprises a hinge part located in the assembling concave positions and an assembling part detachably connected with the cover plate; according to the utility model, the housing and the cover plate are hinged and matched through the hinge arm, the opening and closing of the isolating switch can be realized by rotating the cover plate, and the hinge arm and the cover plate directly adopt a split structure, so that the daily maintenance and replacement are facilitated, and the use flexibility and practicability of the product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of isolating switches, and more specifically, to a combined fuse-type isolating switch. Background Art

[0002] A fuse-type disconnector is a switch that protects electrical equipment through a fuse. The switch is required to be simple and quick to open and close during use. An ordinary fuse-type disconnector usually includes a base with a static contact and an upper cover with a moving contact. The upper cover is hinged to the base through a connecting piece, and the switch is opened and closed by rotating the upper cover.

[0003] At present, a Chinese patent with a publication (announcement) number of CN212517011U discloses a combinable fuse-type disconnector, comprising at least one disconnector unit, the disconnector unit comprising a mounting shell and a fuse, both ends of the inner side of the mounting shell are fixedly provided with wiring terminals for connecting the fuse, the mounting shell comprises a shell and a cover plate, the shell and the cover plate are hinged, the fuse can be detachably fixed to the inner side of the cover plate, a protective cover is provided on the outer side of the wiring terminal at the open end of the shell, the protective cover is provided with a mounting hole, the mounting hole corresponds to the pin of the fuse, the two sides of the shell are respectively provided with a clamping part and a mounting part, and the adjacent clamping parts of the disconnector units arranged side by side can be clamped and fixed with the mounting part;

[0004] The cover plate 3 of the above-mentioned "combinable fuse-type disconnect switch" is hinged to the shell 2 through a rotating block 16, and two hinged arms are correspondingly arranged at the hinge of the cover plate 3. The hinge stability of the cover plate 3 and the shell 2 is ensured by the two hinged arms. However, the hinged arms are prone to wear or damage during daily use. Since the hinged arms and the cover plate 3 are an integrated structure, the entire cover plate needs to be replaced, and the damaged hinged arms cannot be replaced separately, which increases the production and maintenance costs of the product and is not practical. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a combined fuse-type isolating switch to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined fuse-type disconnector, comprising at least one disconnector unit, the disconnector unit comprising a mounting shell and a fuse, both ends of the inner side of the mounting shell are fixedly provided with terminal blocks for connecting the fuse, the mounting shell comprises a shell and a cover plate for sealing the shell, the shell and the cover plate are connected by an articulated arm, and assembly recesses for accommodating the articulated arms are provided on the left and right sides of the mounting shell, the articulated arms comprise an articulated portion located in the assembly recess and an assembly portion detachably connected to the cover plate.

[0007] The utility model is further configured as follows: a pivot is built into the assembly recess, the hinge portion is in a hook-shaped structure and is provided with a matching groove matched with the pivot.

[0008] The utility model is further configured as follows: a limit plate is fixedly installed outside the assembly recess, a through hole is opened on the limit plate and a limit shaft is installed in the through hole, and an arc groove adapted to the limit shaft is opened on the hinged part with the matching groove as the axis.

[0009] The utility model is further configured as follows: the assembly portion is formed with two latching teeth, and the rear end of the cover plate is provided with two latching grooves adapted to the latching teeth, one side of one of the latching teeth is formed with a locking portion, and the outer end of the latching groove is provided with a limiting piece for limiting the locking portion.

[0010] The utility model is further configured as follows: a reinforcing plate is connected between the two latching teeth, and a through slot adapted to the reinforcing plate is provided between the two latching slots.

[0011] The utility model is further configured as follows: an assembly area is formed on the side of the cover plate away from the hinged end, a handle is built into the assembly area and the handle has two lock hooks, and two lock grooves adapted to the lock hooks are correspondingly provided on the left and right sides of the shell.

[0012] The utility model is further configured as follows: two rotating shafts are correspondingly formed on the left and right sides of the handle and are hingedly arranged in an assembly area through the rotating shafts, and an elastic member is built in the assembly area to enable the handle to maintain a locked state.

[0013] In summary, the utility model has the following beneficial effects: the shell and the cover plate are hingedly matched by an articulated arm, the disconnecting switch can be opened and closed by rotating the cover plate, and the articulated arm and the cover plate directly adopt a split structure, which is convenient for daily maintenance and replacement, and improves the flexibility and practicality of the product. 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 three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic cross-sectional view of the structure of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the articulated arm of the utility model;

[0018] Figure 4 It is a schematic diagram of the inner structure of the limiting plate of the utility model.

[0019] Figure numerals: 1. isolating switch unit; 10. mounting shell; 11. housing; 12. cover plate; 13. assembly section; 14. lock hook; 15. lock slot; 16. rotating shaft; 17. elastic member; 18. handle; 2. hinged arm; 20. hinged part; 21. assembly part; 22. matching slot; 23. arc groove; 24. latching tooth; 25. latching slot; 26. locking part; 27. limiting member; 28. reinforcing plate; 29. ​​through slot; 3. assembly recess; 30. pivot; 31. limiting plate; 32. through hole; 33. limiting shaft. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 As shown, a combined fuse-type disconnector of an embodiment of the utility model comprises at least one disconnector unit 1, wherein the disconnector unit 1 comprises a mounting shell 10 and a fuse, wherein both ends of the inner side of the mounting shell 10 are fixedly provided with connection terminals for connecting the fuse, the mounting shell 10 comprises a shell 11 and a cover plate 12 for sealing the shell 11, wherein the shell 11 and the cover plate 12 are connected via an articulated arm 2, and assembly recesses 3 for accommodating the articulated arm 2 are provided on the left and right sides of the mounting shell 10, wherein the articulated arm 2 comprises an articulated portion 20 located in the assembly recess 3 and an assembly portion 21 detachably connected to the cover plate 12.

[0022] When in use, the shell 11 and the cover plate 12 are hingedly matched through the hinged arm 2. The disconnector can be opened and closed by rotating the cover plate 12. The hinged arm 2 and the cover plate 12 directly adopt a split structure, which is convenient for daily maintenance and replacement, and improves the flexibility and practicality of the product.

[0023] A pivot 30 is built into the assembly recess 3, and the hinged portion 20 is a hook-shaped structure and is provided with a matching groove 22 that is adapted to the pivot 30; a limit plate 31 is fixedly installed on the outer side of the assembly recess 3, the limit plate 31 is provided with a through hole 32, and a limit shaft 33 is installed in the through hole 32, and the hinged portion 20 is provided with an arc groove 23 that is adapted to the limit shaft 33 with the matching groove 22 as the axis; the assembly portion 21 is formed with two latch teeth 24, and the rear end of the cover plate 12 is provided with two latch grooves 25 that are adapted to the latch teeth 24, one side of one of the latch teeth 24 is formed with a locking portion 26, and the outer end of the latch groove 25 is provided with a limiting member 27 for limiting the locking portion 26; a reinforcing plate 28 is connected between the two latch teeth 24, and a through groove 29 that is adapted to the reinforcing plate 28 is provided between the two latch grooves 25.

[0024] When in use, during assembly, the hinged portion 20 of the hinged arm 2 is connected to the housing 11 and is located in the assembly recess 3, and the assembly portion 21 of the hinged arm 2 is fixedly connected to the cover plate 12;

[0025] The specific operation of connecting the hinge part 20 with the assembly recess 3 is to place the hinge part 20 into the assembly recess 3, calibrate the matching groove 22 with the pivot 30, install the limit plate 31 to the preset position through the fastener, and then install the limit shaft 33 into the through hole 32. The limit shaft 33 is installed and calibrated with the arc groove 23. When the limit plate 31 is in the installed state, a movable gap is formed between it and the assembly recess 3. The movable gap is adapted to the hinge part 20 to ensure the smooth movement of the hinge part 20; through the rotational cooperation between the pivot 30 and the matching groove 22 and the guiding cooperation between the limit plate 31 and the limit shaft 33, it is ensured that the hinge arm 2 and the shell 11 form a stable hinged cooperation. When the two need to be separated, the opposite operation can be performed.

[0026] The specific operation when the assembly part 21 is connected to the cover plate 12 is to align and push the two latch teeth 24 with the two latch grooves 25 at the rear end of the cover plate 12, and the latch teeth 24 are pushed in and form a limited clamping with the latch groove 25 to complete the connection between the assembly part 21 and the cover plate 12; a locking part 26 is formed on one side of one of the latch teeth 24, and a limiting member 27 (screw or bolt) for limiting the locking part 26 is installed at the outer end of the latch groove 25. After the assembly part 21 is installed in place, the limiting member 27 is tightened, and the locking part 26 is abutted against the limiting member 27 and limits the two latch teeth 24 from exiting the latch groove 25, that is, the locking of the assembly part 21 and the cover plate 12 is completed, and when the two need to be separated, the limiting member 27 can be removed; further, a reinforcing plate 28 is connected between the two latch teeth 24 to increase the structural strength of the two latch teeth 24, and a through groove 29 adapted to the reinforcing plate 28 is opened between the two latch grooves 25 to ensure smooth installation of the assembly part 21.

[0027] An assembly area 13 is formed on the side of the cover plate 12 away from the hinged end, and a handle 18 is built in the assembly area 13. The handle 18 has two locking hooks 14, and two locking grooves 15 adapted to the locking hooks 14 are correspondingly provided on the left and right sides of the shell 11; two rotating shafts 16 are correspondingly formed on the left and right sides of the handle 18 and are hingedly arranged in the assembly area 13 through the rotating shafts 16, and an elastic member 17 is built in the assembly area 13 to keep the handle 18 in a locked state.

[0028] When in use, the handle 18 is hingedly arranged in the assembly area 13 through two rotating shafts 16. In the initial state, the handle 18 is kept in a locked state due to the force of the spring member. In the locked state, the cover plate 12 and the housing 11 are locked by the limit locking formed by the two lock hooks 14 and the lock grooves 15. When the lock of the two needs to be released, the control handle 18 overcomes the force of the spring member and rotates around the rotating shaft 16. The rotation of the handle 18 causes the lock hooks 14 on both sides and the corresponding lock grooves 15 to move from the locked state to the unlocked state, so that the cover plate 12 can be rotated to control the opening and closing of the disconnector;

[0029] The locking structure is provided to prevent the cover plate 12 from being opened by mistake when the power is on, thereby affecting the normal operation of the isolating switch;

[0030] The elastic member 17 is preferably a spring, one end of which is fixedly connected to the inner wall of the assembly area 13 and the other end of which is against the handle 18;

[0031] The utility model comprises at least one primary isolating switch unit 1, and can also be composed of two or three isolating switches arranged transversely to form a secondary or tertiary isolating switch unit 1, and every two adjacent isolating switches are connected by fasteners. Figure 1 , illustrating a three-stage isolating switch unit 1 composed of three isolating switches arranged horizontally. The three-stage isolating switch unit 1 is connected to a three-stage cover plate 12. The three-stage cover plate 12 has two handle 18 locking structures. When opening and closing, both hands are required to control the two handles 18 structures separately and simultaneously to realize the opening and closing of the fuse-type isolating switch. The two-handed operation can effectively increase the operating safety.

[0032] It should also be pointed out that the terms used in the present invention, such as “front”, “rear”, “vertical”, “horizontal”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0033] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A combined fuse-type disconnector, comprising at least one disconnector unit (1), wherein the disconnector unit (1) comprises a mounting shell (10) and a fuse, wherein both ends of the inner side of the mounting shell (10) are fixedly provided with connection terminals for connecting the fuse, wherein: The mounting shell (10) comprises a shell (11) and a cover plate (12) for sealing the shell (11); the shell (11) and the cover plate (12) are connected via an articulated arm (2); the left and right sides of the mounting shell (10) are provided with assembly recesses (3) for accommodating the articulated arm (2); the articulated arm (2) comprises an articulated portion (20) located in the assembly recess (3) and an assembly portion (21) connected to the cover plate (12).

2. The combined fuse-type disconnector according to claim 1, characterized in that: The assembly recess (3) has a built-in pivot (30), and the hinged portion (20) is a hook-shaped structure and is provided with a matching groove (22) adapted to the pivot (30).

3. The combined fuse-type disconnector according to claim 2, characterized in that: A limit plate (31) is fixedly installed outside the assembly recess (3), the limit plate (31) is provided with a through hole (32) and a limit shaft (33) is installed in the through hole (32), and the hinge part (20) is provided with an arc groove (23) adapted to the limit shaft (33) with the matching groove (22) as the axis.

4. The combined fuse-type disconnector according to claim 1, characterized in that: The assembly portion (21) is formed with two latching teeth (24), and the rear end of the cover plate (12) is provided with two latching grooves (25) adapted to the latching teeth (24), one side of one of the latching teeth (24) is formed with a locking portion (26), and the outer end of the latching groove (25) is provided with a limiting member (27) for limiting the locking portion (26).

5. The combined fuse-type disconnector according to claim 4, characterized in that: A reinforcing plate (28) is connected between the two latching teeth (24), and a through slot (29) adapted to the reinforcing plate (28) is provided between the two latching slots (25).

6. The combined fuse-type disconnector according to claim 1, characterized in that: An assembly area (13) is formed on the side of the cover plate (12) facing away from the hinged end, a handle (18) is built into the assembly area (13), and the handle (18) has two locking hooks (14), and two locking grooves (15) adapted to the locking hooks (14) are correspondingly provided on the left and right sides of the housing (11).

7. The combined fuse-type disconnector according to claim 6, characterized in that: Two rotating shafts (16) are correspondingly formed on the left and right sides of the handle (18) and are hingedly arranged in the assembly area (13) via the rotating shafts (16). The assembly area (13) has an elastic member (17) built in to force the handle (18) to maintain a locked state.

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