Shell of current transformer and current transformer

Abstract

The utility model relates to a shell of a current transformer and the current transformer. The shell of the current transformer comprises a first shell body and a second shell body which are hinged to each other, the first shell body is provided with a first containing cavity used for containing a first winding, and the side wall of the first shell body is provided with a first cable groove; the second shell is provided with a second containing cavity used for containing the second winding, and a second cable groove is formed in the side wall of the second shell. The first clamping structure is arranged at the first clamping end of the first shell; the second clamping structure is arranged at the second clamping end of the second shell, the second clamping structure is matched with the first clamping structure, and the first cable groove and the second cable groove can form a through hole capable of containing a tested cable. According to the current transformer, clamping connection of the first shell and the second shell is achieved through the first clamping structure and the second clamping structure, the current transformer can be conveniently arranged on the detected cable in a sleeving mode, looseness during connection of the first shell and the second shell is avoided, and the detection safety is improved.

Description

Technical Field

[0001] The present application relates to the field of current detection equipment, and in particular to a housing of a current transformer and a current transformer. Background Art

[0002] In power systems, current transformers are widely used for current measurement and monitoring in distribution systems. Existing open-type current transformers, due to their ability to operate without power outages, have become a crucial piece of testing equipment in power systems. However, the locking mechanism for open-type current transformers typically uses screws, which can be cumbersome to install and pose the risk of the screws loosening and falling. Utility Model Content

[0003] Based on the above problems, the present application provides a housing of a current transformer, which realizes the connection of the housing through a snap-on structure and is easy to operate.

[0004] The present application provides a housing of a current transformer, comprising:

[0005] A first housing, comprising a first hinged end and a first clamping end, the first housing having a first accommodating cavity for accommodating a first winding, and a first cable groove being provided on a side wall of the first housing;

[0006] a second housing, comprising a second hinged end and a second clamping end, the second hinged end being hingedly connected to the first hinged end of the first housing, the second housing having a second accommodating cavity for accommodating a second winding, and a second cable groove being provided on a side wall of the second housing;

[0007] a first engaging structure, disposed at the first engaging end of the first housing;

[0008] The second clamping structure is arranged at the second clamping end of the second shell, and the second clamping structure is adapted to the first clamping structure. When the second clamping structure is clamped with the first clamping structure, the first cable groove and the second cable groove form a through hole that can accommodate the cable under test.

[0009] According to some embodiments of the present application, the first hinged end of the first shell is provided with a first protrusion, and the first protrusion can abut against the second shell to limit the first clamping end of the first shell from rotating in a direction away from the second shell.

[0010] According to some embodiments of the present application, the first hinged end of the first housing is provided with a second protrusion, the second protrusion is provided with a first wire hole, and the first wire hole is connected to the first accommodating cavity;

[0011] The second shell is provided with a receiving hole adapted to the second protrusion.

[0012] According to some embodiments of the present application, the first engaging structure includes a card plate, one end of the card plate is connected to the first connecting end, and the other end of the card plate is provided with a card hole;

[0013] The second engaging structure includes a first hook, which is arranged at the second engaging end and can be engaged with the engaging hole.

[0014] According to some embodiments of the present application, the first engaging structure includes a card slot, and the card slot is provided at the first card end;

[0015] The second clamping end is provided with a sliding hole, and the second clamping structure includes:

[0016] A sliding post is slidably disposed in the sliding hole, and the bottom end of the sliding post can slide into the slot;

[0017] An elastic member is disposed in the second housing, and the elastic member can push the sliding column to move toward the clamping slot.

[0018] According to some embodiments of the present application, the second engaging structure further includes an upper cover, which is disposed on the top end of the sliding column.

[0019] According to some embodiments of the present application, the housing of the current transformer further includes a compression structure, and the compression structure is used to compress the cable under test.

[0020] According to some embodiments of the present application, the compression structure includes:

[0021] a first pressing block, disposed in the first cable slot;

[0022] The second pressing block is arranged in the second cable groove, and the first pressing block and the second pressing block can respectively abut against the tested cable.

[0023] According to some embodiments of the present application, the compression structure includes:

[0024] a first boss, disposed on a side wall of the first shell;

[0025] a second boss, disposed on a side wall of the second shell;

[0026] a third pressing block, slidably disposed on the second boss;

[0027] The locking structure is provided on the second boss and can push the third pressing block to slide, so that the third pressing block and the first boss press the cable under test.

[0028] According to some embodiments of the present application, the locking structure includes:

[0029] a nut, disposed on the second boss;

[0030] A screw is matched with the nut, and the screw can abut against the third pressing block.

[0031] The present application realizes the clamping connection between the first shell and the second shell through the first clamping structure and the second clamping structure, which facilitates the current transformer to be mounted on the cable to be tested, avoids loosening when the first shell and the second shell are connected, and improves the safety of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without exceeding the scope of protection required by this application.

[0033] Figure 1 is a schematic diagram of a housing of a current transformer according to an embodiment of the present application;

[0034] Figure 2 is a schematic diagram of a first shell and a second shell according to an embodiment of the present application;

[0035] Figure 3 Schematic diagram of the first accommodating cavity and the second accommodating cavity in an embodiment of the present application;

[0036] Figure 4 is a schematic diagram of the first protrusion and the second protrusion of an embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of a snap-fit ​​structure according to an embodiment of the present application;

[0038] Figure 6 is a schematic diagram of another engaging structure according to an embodiment of the present application;

[0039] Figure 7 This is a schematic diagram of a compression structure according to an embodiment of the present application;

[0040] Figure 8 is a schematic diagram of another compression structure according to an embodiment of the present application;

[0041] Figure 9 This is a schematic diagram of the locking structure of an embodiment of the present application;

[0042] Figure 10 It is a schematic diagram of the third pressing block in the embodiment of the present application. DETAILED DESCRIPTION

[0043] The following is a clear and complete description of the technical solution of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts are within the scope of protection of this application.

[0044] like Figure 1 As shown, an embodiment of the present application provides a housing (hereinafter referred to as housing) 100 of a current transformer. The housing 100 includes: a first shell 1 , a second shell 2 , a first locking structure 3 and a second locking structure 4 .

[0045] like Figure 2 and Figure 3 As shown, the first housing 1 includes a first hinged end 1a and a first clamping end 1b. The first housing 1 has a first accommodating cavity 11, in which the first winding 410 is disposed. The shape of the first accommodating cavity 11 is adapted to the first winding 410. A first cable groove 12 is provided on the side wall of the first housing 1 near the second housing 2. The first cable groove 12 is generally semicircular.

[0046] The second housing 2 includes a second hinged end 2a and a second clamping end 2b. The second housing 2 has a second accommodating cavity 21 for accommodating the second winding 420. The shape of the second accommodating cavity 21 is adapted to accommodate the second winding 420. A second cable trough 22 is provided on the side wall of the second housing 2 adjacent to the first housing 1. The second cable trough 22 is generally semicircular.

[0047] The second hinged end 2a of the second housing 2 is hingedly connected to the first hinged end 1a of the first housing 1. For example, an axis hole 13 is provided at the first hinged end 1a, and a rotating shaft 23 is provided at the second hinged end 2a. The rotating shaft 23 is inserted into the axis hole 13 to realize the hinged connection between the second hinged end 2a and the first hinged end 1a.

[0048] A first engaging structure 3 is provided at the first engaging end 1b of the first housing 1. A second engaging structure 4 is provided at the second engaging end 2b of the second housing 2, and the second engaging structure 4 is adapted to the first engaging structure 3. When the second engaging structure 4 is engaged with the first engaging structure 3, the first housing 1 and the second housing 2 cannot move relative to each other. The bottom end of the first winding 410 abuts against the bottom end of the second winding 420, and the top end of the first winding 410 abuts against the top end of the second winding 420. The first cable groove 12 and the second cable groove 22 form a through hole capable of accommodating the cable under test 200.

[0049] Optionally, the second hinged end 2 a of the second housing 2 is provided with a wire 300 , which includes a first wire 310 and a second wire 320 . The first wire 310 is electrically connected to the first winding 410 , and the second wire 320 is electrically connected to the second winding 420 .

[0050] When using the current transformer, separate the first clamping end 1b of the first shell 1 from the second clamping end 2b of the second shell 2, put the current transformer on the cable under test 200, so that the cable under test 200 is located in the through hole formed by the first cable groove 12 and the second cable groove 22, rotate the first shell 1 or the second shell 2, so that the second clamping structure 4 is clamped with the first clamping structure 3 to detect the cable under test 200.

[0051] In this embodiment, the first housing 1 and the second housing 2 are connected by the first and second locking structures 3 and 4, which facilitates the installation of the current transformer on the cable 200 under test and prevents the first and second housings 1 and 2 from becoming loose during connection, thereby improving the safety of detection.

[0052] like Figure 4 As shown, in some embodiments, a first protrusion 14 is provided on the end surface of the first hinged end 1a of the first housing 1. When the first clamping end 1b of the first housing 1 is rotated away from the second housing 2, the first protrusion 14 can abut the side wall of the second housing 2 to limit the first clamping end 1b of the first housing 1 from further rotation away from the second housing 2, thereby preventing the current transformer from being excessively opened.

[0053] In some embodiments, a second protrusion 15 is provided on the sidewall of the first hinged end 1a of the first housing 1. Optionally, the second protrusion 15 is substantially rectangular. A first wire hole 16 is provided on the second protrusion 15. The first wire hole 16 communicates with the first accommodating cavity 11. The first wire 310 passes through the first wire hole 16 and enters the first accommodating cavity 11.

[0054] The second housing 2 is provided with a receiving hole 24 adapted to fit the second protrusion 15. Optionally, the receiving hole 24 is communicated with the second receiving cavity 21. The first wire 310 passes through the receiving hole 24 and the first wire hole 16 and enters the first receiving cavity 11.

[0055] Glue is filled between the hole wall of the first wire hole 16 and the first wire 310 to fix the first wire 310 and prevent the rotation of the first housing 1 from affecting the connection between the first wire 310 and the first winding 410 .

[0056] like Figure 5As shown, in some embodiments, the first engaging structure 3 includes a clamping plate 31. The clamping plate 31 is located above the first engaging end 1b, with one end of the clamping plate 31 connected to the first engaging end 1b. The other end of the clamping plate 31 is provided with a clamping hole 32. The second engaging structure 4 includes a first clamping hook 41, which is provided at the second engaging end 2b. The first clamping hook 41 can be clamped into the clamping hole 32.

[0057] Optionally, the end surface of the first hook 41 proximal to the first housing 1 is an inclined surface. When the first housing 1 approaches the second housing 2, the first hook 41 abuts against the retaining plate 31, slightly lifting the retaining plate 31 and causing elastic deformation of the retaining plate 31. After the first hook 41 moves into the retaining hole 32, the retaining plate 31 returns to its original position, completing the engagement between the first hook 41 and the retaining plate 31.

[0058] like Figure 6 As shown, in some embodiments, the first engaging structure 3 includes a slot 33, which is provided at the top of the first engaging end 1a. The second engaging end 2b is provided with a sliding hole 25. The second engaging structure 4 includes: a slide post 42 and an elastic member 43. The slide post 42 is slidably provided in the sliding hole 25, the top end of the slide post 42 is located outside the sliding hole 25, and the bottom end of the slide post 42 can slide into the slot 33. The elastic member 43 is provided in the second shell 2, and the elastic member 43 can push the slide post 42 to move in a direction close to the slot 33 so that the slide post 42 remains in the slot 33. Optionally, the elastic member 43 is a spring, one end of the elastic member 43 is connected to the slide post 42, and the other end of the elastic member 43 abuts against the inner wall of the second shell 2.

[0059] To connect the first and second housings 1 and 2, the first housing 1 is rotated toward the second housing 2. The first housing 1 contacts and lifts the slide post 42, causing the elastic member 43 to elastically deform. The first housing 1 continues to rotate, causing the slide post 42 to slide into the slot 33, and the elastic member 43 to return to its original position, completing the connection between the first and second housings 1 and 2.

[0060] When the first shell 1 and the second shell 2 need to be separated, the slide post 42 is appropriately lifted, the bottom end of the slide post 42 is disengaged from the slot 33, and the first shell 1 is rotated away from the second shell 2 to separate the first shell 1 and the second shell 2.

[0061] In some embodiments, the second engaging structure 4 further includes an upper cover 44, which is disposed on the top of the slide post 42. The length of the upper cover 44 is greater than the diameter of the slide hole 25. The upper cover 44 facilitates lifting the slide post 42 and also prevents the slide post 42 from sliding downward excessively.

[0062] like Figure 7As shown, in some embodiments, the housing 100 further includes a clamping structure 5. When the first shell 1 and the second shell 2 are clamped, the clamping structure 5 is used to clamp the cable under test 200 to prevent relative movement between the current transformer and the cable under test 200 during the detection process.

[0063] In some embodiments, the compression structure 5 includes a first compression block 51 and a second compression block 52. The first compression block 51 and the second compression block 52 are both roughly semicircular in shape. The first compression block 51 is disposed in the first cable trough 12, and the second compression block 52 is disposed in the second cable trough 22. When the first housing 1 and the second housing 2 are engaged, the first compression block 51 and the second compression block 52 can respectively abut against the cable under test 200 to compress the cable under test 200. Optionally, the first compression block 51 and the second compression block 52 are both rubber and can elastically deform when abutting against the cable under test 200.

[0064] like Figure 8 and Figure 9 As shown, in some embodiments, the pressing structure 5 includes: a first boss 53 , a second boss 54 , a third pressing block 55 and a locking structure 56 .

[0065] A first boss 53 is provided on a side wall of the first housing 1, and a second boss 54 is provided on a side wall of the second housing 2. The cable under test 200 is located between the first boss 53 and the second boss 54, and the first boss 53 can abut the cable under test 200. A third pressure block 55 is slidably provided on the second boss 54, and the third pressure block 55 can abut the cable under test 200.

[0066] The locking structure 56 is provided on the second boss 54. The locking structure 56 can push the third pressing block 55 to slide toward the first boss 53, so that the third pressing block 55 and the first boss 53 press the tested cable 200. Optionally, both the first boss 53 and the third pressing block 55 are provided with grooves adapted to the tested cable 200.

[0067] like Figure 9 and Figure 10 As shown, in some embodiments, the second boss 54 is provided with a pressing block cavity 541 adapted to accommodate the third pressing block 55. A guide block 551 is provided on the side wall of the third pressing block 55, and a guide groove adapted to accommodate the guide block 551 is provided on the inner wall of the pressing block cavity 541, so that the third pressing block 55 can slide in the pressing block cavity 541 without completely sliding out of the pressing block cavity 541.

[0068] The locking structure 56 includes a nut 561 and a screw 562. A nut hole 542 is provided on the second boss 54, communicating with the pressure block cavity 541. The nut 561 is inserted into the nut hole 542. The screw 562 mates with the nut 561 and abuts against the third pressure block 55, pushing it to compress the cable under test 200. Loosening the screw 562 releases the third pressure block 55 from compressing the cable under test 200.

[0069] An embodiment of the present application further provides a current transformer, which includes the housing 100 as described above.

[0070] The embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the technical solutions and core concepts of the present application. Therefore, changes or modifications made by those skilled in the art based on the concepts of the present application, the specific implementation methods, and the scope of application of the present application, all fall within the scope of protection of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

1. A housing of a current transformer, characterized in that: include: A first housing, comprising a first hinged end and a first clamping end, the first housing having a first accommodating cavity for accommodating a first winding, and a first cable groove being provided on a side wall of the first housing; a second housing, comprising a second hinged end and a second clamping end, the second hinged end being hingedly connected to the first hinged end of the first housing, the second housing having a second accommodating cavity for accommodating a second winding, and a second cable groove being provided on a side wall of the second housing; a first engaging structure, disposed at the first engaging end of the first housing; The second clamping structure is arranged at the second clamping end of the second shell, and the second clamping structure is adapted to the first clamping structure. When the second clamping structure is clamped with the first clamping structure, the first cable groove and the second cable groove form a through hole that can accommodate the cable under test.

2. The housing of the current transformer according to claim 1, characterized in that: The first hinged end of the first shell is provided with a first protrusion, and the first protrusion can abut against the second shell to limit the first clamping end of the first shell from rotating in a direction away from the second shell.

3. The housing of the current transformer according to claim 1, characterized in that: The first hinged end of the first housing is provided with a second protrusion, the second protrusion is provided with a first wire hole, and the first wire hole is connected to the first accommodating cavity; The second shell is provided with a receiving hole adapted to the second protrusion.

4. The housing of the current transformer according to claim 1, characterized in that: The first engaging structure includes a card plate, one end of which is connected to the first engaging end, and the other end of which is provided with a card hole; The second engaging structure includes a first hook, which is arranged at the second engaging end and can be engaged with the engaging hole.

5. The housing of the current transformer according to claim 1, characterized in that: The first engaging structure includes a card slot, and the card slot is provided at the first card end; The second clamping end is provided with a sliding hole, and the second clamping structure includes: A sliding post is slidably disposed in the sliding hole, and the bottom end of the sliding post can slide into the slot; An elastic member is disposed in the second housing, and the elastic member can push the sliding column to move toward the clamping slot.

6. The housing of the current transformer according to claim 5, characterized in that: The second engaging structure further includes an upper cover, and the upper cover is arranged on the top end of the sliding column.

7. The housing of the current transformer according to claim 1, characterized in that: It also includes a compression structure, which is used to compress the cable under test.

8. The housing of the current transformer according to claim 7, characterized in that: The compression structure comprises: a first pressing block, disposed in the first cable slot; The second pressing block is arranged in the second cable groove, and the first pressing block and the second pressing block can respectively abut against the tested cable.

9. The housing of the current transformer according to claim 7, characterized in that: The compression structure comprises: a first boss, disposed on a side wall of the first shell; a second boss, disposed on a side wall of the second shell; a third pressing block, slidably disposed on the second boss; The locking structure is provided on the second boss and can push the third pressing block to slide, so that the third pressing block and the first boss press the cable under test.

10. The housing of the current transformer according to claim 9, characterized in that: The locking structure comprises: a nut, disposed on the second boss; A screw is matched with the nut, and the screw can abut against the third pressing block.

11. A current transformer, comprising the housing according to any one of claims 1 to 10.

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