Outdoor waterproof open-close type current transformer

Abstract

The utility model discloses an outdoor waterproof open-close type current transformer which comprises a transformer body, the transformer body comprises an upper shell and a lower shell, the upper shell can swing relative to the lower shell in a hinged mode, and the outdoor waterproof open-close type current transformer is characterized in that a first pressing edge and a third pressing edge are arranged on the abutting face of the upper shell; a first sealing ring and a third sealing ring are arranged on the abutting face of the upper shell, a second sealing ring is arranged between the first pressing edge and the third pressing edge, a first sealing ring and a third sealing ring are arranged on the abutting face of the lower shell, a second pressing edge is arranged between the first sealing ring and the third sealing ring, and after the abutting face of the upper shell abuts against the abutting face of the lower shell, the first sealing ring and the third sealing ring are sealed. And a multi-stage sealing cavity is formed between the upper shell and the lower shell, so that the problem that the service life of the current transformer is influenced by corrosion and open circuit of an internal coil due to the fact that external dust and rainwater can still enter the current transformer through a gap at the mounting and connecting part of the shell is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, and more specifically to an outdoor waterproof split-type current mutual inductor. Background Art

[0002] A current transformer is a common current measuring instrument. In the prior art, a current transformer generally includes two upper and lower shell sections that are arranged opposite to each other. A core section is installed in each of the two shell sections. When the two shell sections are buckled together, the two core sections are connected to form a ring core. The cable passes through the ring core so that the cable can be tested.

[0003] Existing outdoor split-type current transformers usually use rubber rings to seal the split parts, but the corresponding overall waterproof structure is too simple. As a result, during outdoor use, external dust and rainwater can still enter the interior of the current transformer through the gaps at the shell installation connection, causing problems such as internal coil corrosion and circuit breaking, which affects the service life of the transformer. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an outdoor waterproof open-close current transformer, which improves the overall waterproof performance of the current transformer by setting up a multi-stage sealed cavity, and solves the problem that external dust and rainwater can still enter the interior of the current transformer through the gap at the installation connection of the shell, causing corrosion and short circuit of the internal coil, thereby affecting the service life of the transformer.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an outdoor waterproof open-and-close current transformer, comprising a transformer body, the transformer body comprising an upper shell and a lower shell, the upper shell can be hinged and swung relative to the lower shell, and is characterized in that: a first clamping edge and a third clamping edge are arranged on the abutting surface of the upper shell, a second sealing ring is arranged between the first clamping edge and the third clamping edge, a first sealing ring and a third sealing ring are arranged on the abutting surface of the lower shell, a second clamping edge is arranged between the first sealing ring and the third sealing ring, and after the abutting surface of the upper shell and the abutting surface of the lower shell are abutted, a multi-stage sealed cavity is formed between the upper shell and the lower shell.

[0006] The utility model is further configured as follows: a clamping mechanism and a positioning boss are arranged on the lower shell body, and the clamping mechanism and the positioning boss are arranged opposite to each other.

[0007] The utility model is further configured as follows: the clamping mechanism includes a mounting block, an adjusting screw and a clamping block, an adjusting nut is arranged in the mounting block, the adjusting screw passes through the mounting block and is matched with the adjusting nut, the adjusting screw extends into the clamping block, one end of the adjusting screw extending into the clamping block is provided with a mounting groove, and the other end is provided with an adjusting knob, a limiting plate is provided on the clamping block, and the limiting plate is inserted into the clamping block and matched with the mounting groove.

[0008] The utility model is further configured as follows: a plurality of locking blocks are arranged in a circular array on the adjusting nut, a chamfer is arranged on the upper surface of the locking block, a locking rubber is arranged inside the locking block, the locking rubber is in contact with the adjusting screw, a locking slider is slidably arranged inside the mounting block, an inclined surface inclined to the axis of the regulating valve stem is arranged on the locking slider, and the locking slider is adapted to the locking block.

[0009] The utility model is further configured as follows: an air drying box is arranged on one side of the upper shell and the lower shell away from the iron core.

[0010] The utility model is further configured as follows: both the upper shell and the lower shell are provided with a clamping cavity, and waterproof grease is provided in the clamping cavity.

[0011] In summary, the utility model has the following beneficial effects:

[0012] 1. Compared with the prior art, the utility model forms a multi-stage sealed cavity at the opening by setting a pressing edge and a sealing ring, so that the waterproof performance of the entire open-close current transformer is greatly improved. Furthermore, during outdoor use, rainwater and dust from the outside cannot enter the interior of the current transformer through the installation gap of the shell, so that the internal coil and battery core will not rust and corrode, thereby improving the service life of the overall current transformer.

[0013] 2. The utility model is provided with a locking assembly on the clamping mechanism. When in use, after the clamping mechanism completes clamping the conductor to be measured, the clamping mechanism is locked by the locking assembly. Therefore, when the transformer is used outdoors, the clamping mechanism will not loosen when vibrating or colliding, making the installation connection more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the embodiment in a closed state;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the embodiment in the open and closed state;

[0016] Figure 3 Schematic diagram of the internal structure of the sealed chamber of this embodiment;

[0017] Figure 4is a schematic diagram of the internal structure of the clamping device of this embodiment;

[0018] Figure 5 is a schematic diagram of the three-dimensional structure of the clamping device of this embodiment;

[0019] Figure 6 is a schematic diagram of the three-dimensional structure of the locking device of this embodiment;

[0020] Figure 7 This embodiment Figure 4 A partial enlarged schematic diagram.

[0021] Figure numerals: 1. Transformer body; 2. Upper shell; 201. First clamping edge; 202. Third clamping edge; 203. Second sealing ring; 3. Lower shell; 301. First sealing ring; 302. Third sealing ring; 303. Second clamping edge; 4. Clamping mechanism; 401. Mounting block; 402. Adjusting screw; 403. Clamping block; 404. Adjusting nut; 5. Positioning boss; 6. Mounting groove; 7. Adjusting knob; 8. Limiting plate; 9. Locking block; 10. Chamfer; 11. Locking rubber; 12. Locking slider; 13. Inclined surface; 14. Air drying box; 15. Snap-in cavity. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] This embodiment discloses an outdoor waterproof split-type current transformer, such as Figure 1-7 As shown, it includes a transformer body 1, which includes an upper shell 2 and a lower shell 3. The upper shell 2 can be hinged and swung relative to the lower shell 3. The abutting surface of the upper shell 2 is provided with a first clamping edge 201 and a third clamping edge 202, and a second sealing ring 203 is provided between the first clamping edge 201 and the third clamping edge 202. The abutting surface of the lower shell 3 is provided with an installation cavity, and the installation cavity is provided with a first sealing ring 301 and a third sealing ring 302, and a second clamping edge 303 is provided between the first sealing ring 301 and the third sealing ring 302. After the abutting surface of the upper shell 2 and the abutting surface of the lower shell 3 are abutted, a multi-stage sealing cavity is formed between the upper shell 2 and the lower shell 3. After the upper shell 2 and the lower shell 3 are closed, the first clamping edge 201 and the third clamping edge 202 arranged on the upper shell 2 can press the first mounting ring and the third mounting ring arranged on the lower shell 3, thereby forming a first waterproof cavity and a third waterproof cavity. At the same time, the second clamping edge 303 arranged on the lower shell 3 presses the second sealing ring 203 arranged on the upper shell 2 to form a second waterproof cavity, thereby forming a maze-like multi-stage sealing cavity as a whole, which greatly improves the overall waterproof performance, prevents the internal coil and the iron core from rusting and corrosion, and thereby extends the overall service life.

[0024] The utility model further provides that the lower shell 3 is provided with a clamping mechanism 4 and a positioning boss 5, and the clamping mechanism 4 is arranged opposite to the positioning boss 5. The utility model further provides that the clamping mechanism 4 includes a mounting block 401, an adjusting screw 402 and a clamping block 403, an adjusting nut 404 is arranged in the mounting block 401, the adjusting screw 402 passes through the mounting block 401 and is matched with the adjusting nut 404, the adjusting screw 402 extends into the clamping block 403, one end of the adjusting screw 402 extending into the clamping block 403 is provided with a mounting groove 6, and the other end is provided with an adjusting knob 7, and a limiting plate 8 is provided on the clamping block 403, and the limiting plate 8 is inserted into the clamping block 403 and plugged into the mounting groove 6. This arrangement can easily replace the accessories of the clamping mechanism 4, and after being worn outdoors, the accessories can be easily replaced so as to continue working.

[0025] The utility model further provides a plurality of locking blocks 9 arranged in a circumferential array on the adjusting nut 404, a chamfer 10 is provided on the upper surface of the locking block 9, a locking rubber 11 is provided inside the locking block 9, the locking rubber 11 contacts the adjusting screw 402, a locking slider 12 is slidably provided inside the mounting block 401, a slope 13 inclined toward the axis of the regulating valve stem is provided on the locking slider 12, and the locking slider 12 is adapted to the locking block 9. During the installation process, after the adjusting screw 402 drives the clamping block 403 to clamp the measured cable, the installer slides the locking slider 12 toward the locking block 9. Since the locking slider 12 is provided with an inclined surface 13 that fits the chamfer 10 of the locking block 9, the locking block 9 is driven to deform toward the adjusting screw 402 during the sliding process, so that the locking rubber 11 provided on the locking block 9 fits with the adjusting screw 402, so that the adjusting screw 402 is locked due to friction, thereby enabling a more stable connection outdoors.

[0026] The utility model further provides an air drying box 14 on the side away from the iron core in the upper shell 2 and the lower shell 3. An air desiccant is placed in the air drying box 14, so that it can absorb and filter the moisture in the air inside the current transformer, thereby keeping the internal air dry and preventing the internal iron core from rusting.

[0027] The utility model further arranges that both the upper shell 2 and the lower shell 3 are provided with a clamping cavity 15, and waterproof grease is arranged in the clamping cavity 15, which can further prevent external air and dust from entering the interior through the gap.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. An outdoor waterproof split-type current transformer, comprising a transformer body (1), wherein the transformer body (1) comprises an upper shell (2) and a lower shell (3), wherein the upper shell (2) can be hinged and swung relative to the lower shell (3), and characterized in that: The upper shell (2) is provided with a first clamping edge (201) and a third clamping edge (202) on the abutting surface, and a second sealing ring (203) is provided between the first clamping edge (201) and the third clamping edge (202). The lower shell (3) is provided with a first sealing ring (301) and a third sealing ring (302) on the abutting surface, and a second clamping edge (303) is provided between the first sealing ring (301) and the third sealing ring (302). When the abutting surface of the upper shell (2) and the abutting surface of the lower shell (3) are in abutment with each other, a multi-stage sealing cavity is formed between the upper shell (2) and the lower shell (3).

2. An outdoor waterproof split-type current transformer according to claim 1, characterized in that: The lower shell (3) is provided with a clamping mechanism (4) and a positioning boss (5), and the clamping mechanism (4) and the positioning boss (5) are arranged opposite to each other.

3. An outdoor waterproof split-type current transformer according to claim 2, characterized in that: The clamping mechanism (4) comprises a mounting block (401), an adjusting screw (402) and a clamping block (403); an adjusting nut (404) is arranged in the mounting block (401); the adjusting screw (402) passes through the mounting block (401) and is matched with the adjusting nut (404); the adjusting screw (402) extends into the clamping block (403); one end of the adjusting screw (402) extending into the clamping block (403) is provided with a mounting groove (6); the other end is provided with an adjusting knob (7); a limiting plate (8) is arranged on the clamping block (403); the limiting plate (8) is inserted into the clamping block (403) and is matched with the mounting groove (6).

4. The outdoor waterproof split-type current transformer according to claim 3, characterized in that: The adjusting nut (404) is provided with a plurality of locking blocks (9) in a circular array, the upper surface of the locking block (9) is provided with a chamfer (10), a locking rubber (11) is provided inside the locking block (9), the locking rubber (11) is in contact with the adjusting screw (402), a locking slider (12) is slidably provided inside the mounting block (401), the locking slider (12) is provided with an inclined surface (13) inclined toward the axis of the adjusting valve stem, and the locking slider (12) is adapted to the locking block (9).

5. The outdoor waterproof split-type current transformer according to claim 1, characterized in that: An air drying box (14) is provided in the upper shell (2) and the lower shell (3) on a side away from the iron core.

6. The outdoor waterproof split-type current transformer according to claim 1, characterized in that: The upper shell (2) and the lower shell (3) are both provided with a snap-fitting cavity (15), and waterproof grease is provided in the snap-fitting cavity (15).

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