Open-close type waterproof current transformer

Abstract

The utility model discloses an open-close type waterproof current transformer which comprises a transformer shell, the transformer shell comprises an upper shell body and a lower shell body, the two ends of the lower shell body are respectively provided with an installation cavity, the two ends of the upper shell body are respectively provided with a clamping block, and the upper shell body and the lower shell body are matched in an inserted mode through the installation cavities and the clamping blocks. Rotating shafts are arranged at the two ends of the upper shell and the two ends of the lower shell correspondingly, the rotating shafts penetrate through the mounting cavities and the clamping blocks, and after the rotating shaft at one end is detached, the upper shell can swing relative to the lower shell through the rotating shaft at the other end; telescopic button assemblies are arranged on the two sides of the upper shell correspondingly and can be fixed after the upper shell and the lower shell are inserted in a matched mode, and the problem that enough space cannot be provided for the upper shell to rotate along a rotating shaft at a specific position or in a narrow space is solved. And after the open-close type current transformer is buckled, two iron cores are not tightly attached to each other, so that the measurement precision of the transformer is influenced.

Description

Technical Field

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

[0002] The current transformer consists of a closed iron core and a wire package (induction coil), in which the wire package is wound on the iron core. It is an instrument that converts a large current on the primary side into a small current on the secondary side to achieve current measurement based on the principle of electromagnetic induction. There are many types of current transformers, typically closed current transformers and open-close current transformers. Among them, the open-close current transformer can measure current without disconnecting the measured circuit. It is easy to use and widely used.

[0003] The upper shell and the lower shell of the existing split-type current transformer are usually connected by an axis, so that the upper shell and the lower shell can be installed through the axis. However, this arrangement makes it impossible to completely separate the upper shell from the lower shell, and there is not enough space for the upper shell to rotate along the shaft in a specific position or a narrow space, which makes the operation complicated and the installation inconvenient. Moreover, after the two cores of the split-type current transformer are buckled together, they often do not fit tightly and the cross-sections cannot be accurately aligned, which affects the measurement accuracy of the transformer. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides an open-and-close waterproof current transformer, which solves the problems that there is not enough space for the upper shell to rotate along the shaft in a specific position or a narrow space, thereby making the operation complicated and inconvenient to install, and the two iron cores of the open-and-close current transformer are not tightly fitted after being buckled, which affects the measurement accuracy of the transformer.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an open-and-close waterproof current transformer, comprising a transformer housing, the transformer housing comprising an upper shell and a lower shell, installation cavities are respectively provided at both ends of the lower shell, and clamping blocks are respectively provided at both ends of the upper shell, the upper shell and the lower shell are plugged together through the installation cavity and the clamping block, and rotating shafts are respectively provided at both ends of the upper shell and the lower shell, and the rotating shaft passes through the installation cavity and the clamping block. After the rotating shaft at one end is removed, the upper shell can be swung relative to the lower shell through the rotating shaft at the other end; telescopic button assemblies are respectively provided on both sides of the upper shell, and the telescopic button assemblies can be fixed after the upper shell and the lower shell are plugged together.

[0006] The utility model is further configured as follows: the telescopic button assembly includes a first button and a second button symmetrically arranged, the first button and the second button are provided with a pressing portion and a clamping portion, a spring is provided in the pressing portion, one end of the spring is abutted against the bottom of the pressing portion of the first button, and the other end is abutted against the bottom of the second pressing portion; a fixing groove is provided in the installation cavity to be plugged into the clamping portion.

[0007] The utility model is further configured as follows: the installation cavity is provided with an abutting inclined surface on the contact path with the clamping portion, and the end surface of the clamping portion is provided with a chamfer matched with the abutting inclined surface.

[0008] The utility model is further configured as follows: an iron core is respectively arranged in the upper shell and the lower shell, and a plurality of helical teeth are arranged on the contact surface of the iron core, and when the upper shell and the lower shell are plugged together, the helical teeth of the iron core are meshed.

[0009] The utility model is further configured as follows: a sliding groove adapted to the first button and the second button is provided on the upper shell, and the sliding groove makes the telescopic button assembly more stable when telescoping.

[0010] The utility model is further configured as follows: a nut is arranged at one end of the rotating shaft, and a fixing nut connected by thread is arranged at the other end.

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

[0012] 1. Compared with the prior art, the utility model is provided with four telescopic buttons on the upper shell, and a spring is provided inside the telescopic buttons, so that when the upper shell and the lower shell are plugged in, the telescopic buttons will shrink inward until they are plugged in with the fixing groove, so that the upper shell and the lower shell are quickly fixed, and rotating shafts passing through the upper and lower shells are provided at both ends of the current transformer, and an installation cavity is provided on the lower shell. During installation, if the space on the left side is insufficient, the rotating shaft on the other side can be installed so that it can be swung and installed from the right side, and then it can be switched according to actual usage; then, when the space on both sides during installation is relatively small and there is no swinging space, there is no need to install the rotating shaft, and it can be directly plugged in, so as to meet a variety of usage scenarios.

[0013] 2. Compared with the prior art, the utility model provides helical teeth on the contact surface of the iron core of the upper and lower shells of the current transformer, so that after the upper shell and the lower shell are plugged in, the helical teeth of the iron core mesh with each other, thereby making the iron core connection more stable and preventing the cross section from being misaligned, thereby ensuring the accuracy of the current transformer measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment;

[0015] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of this embodiment;

[0016] Figure 3 is a schematic diagram of the internal three-dimensional structure of the upper shell of this embodiment;

[0017] Figure 4 It is a schematic diagram of the internal structure of this embodiment after closing.

[0018] Figure numerals: 1. Transformer housing; 101. Upper housing; 102. Lower housing; 2. Mounting cavity; 3. Snap-in block; 4. Rotating shaft; 5. Telescopic button assembly; 501. First button; 502. Second button; 6. Pressing portion; 7. Snap-in portion; 8. Spring; 9. Fixing groove; 10. Abutting inclined surface; 11. Chamfer; 12. Iron core; 13. Bevel teeth; 14. Sliding groove; 15. Nut; 16. Fixing nut. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] This embodiment discloses a split waterproof current transformer, such as Figure 1-4 As shown, the transformer housing 1 includes an upper housing 101 and a lower housing 102. The lower housing 102 has installation cavities 2 at both ends, and the upper housing 101 has clamping blocks 3 at both ends. The upper housing 101 and the lower housing 102 are plugged together through the installation cavity 2 and the clamping blocks 3. The upper housing 101 and the lower housing 102 have rotating shafts 4 at both ends, and the rotating shafts 4 penetrate the installation cavity 2 and the clamping blocks 3. After the rotating shaft 4 at one end is removed, the upper housing 101 can swing relative to the lower housing 102 through the rotating shaft 4 at the other end; telescopic button assemblies 5 are respectively provided on both sides of the upper housing 101, and the telescopic button assemblies 5 can be fixed after the upper housing 101 and the lower housing 102 are plugged together. The present invention is provided with a telescopic button assembly 5 on the upper shell 101, so that when the upper shell 101 and the lower shell 102 are plugged in, the telescopic button assembly 5 will shrink inward until it extends out from the installation cavity 2, thereby fixing the upper shell 101 and the lower shell 102; when using the present open-and-closed current transformer, when the space where the transformer needs to be installed is large, the rotating shaft 4 at one end can be installed first, so that the upper shell 101 can be swung by the rotating shaft 4, and the installation and fixation can be completed quickly. Therefore, the present invention can adjust the installation method of the current transformer according to the conditions of the installation site, thereby greatly increasing the installation efficiency.

[0021] The utility model is further configured as follows: the telescopic button assembly 5 includes a first button 501 and a second button 502 symmetrically arranged, a pressing portion 6 and a clamping portion 7 are arranged on the first button 501 and the second button 502, a spring 8 is arranged in the pressing portion 6, one end of the spring 8 abuts against the bottom of the pressing portion 6 of the first button 501, and the other end abuts against the bottom of the second pressing portion 6; a fixing groove 9 is arranged in the installation cavity 2 to be plugged with the clamping portion 7. The utility model is further configured as follows: the installation cavity 2 is provided with an abutting inclined surface 10 on the contact path with the clamping portion 7, and a chamfer 11 matching the abutting inclined surface 10 is arranged on the end surface of the clamping portion 7. This arrangement allows, during installation, when the upper shell 101 and the lower shell 102 are plugged together, the chamfer 11 of the clamping portion 7 abuts against the abutting slope 10 provided on the installation cavity 2, and then when the clamping portion 7 slides inward and moves to the position of the fixing groove 9, the force of the spring 8 makes it plug into the fixing groove 9, thereby completing the installation and fixation; when disassembling, it is only necessary to press the pressing portion 6, thereby driving the clamping portion 7 to separate from the fixing groove 9, and then remove the upper shell 101.

[0022] The utility model is further configured as follows: an iron core 12 is respectively arranged in the upper shell 101 and the lower shell 102, and a plurality of helical teeth 13 are arranged on the contact surface of the iron core 12, and when the upper shell 101 and the lower shell 102 are plugged together, the helical teeth 13 of the iron core 12 are meshed. The helical teeth 13 are arranged on the contact surface of the iron core 12, so that when the split current transformer is closed, the iron cores 12 can be in closer contact and will not be offset.

[0023] The utility model is further configured as follows: a sliding groove 14 adapted to the first button 501 and the second button 502 is provided on the upper shell 101, and the sliding groove 14 makes the telescopic button assembly 5 more stable when telescoping. The sliding groove 14 enables the button to slide and telescope smoothly in the upper shell 101.

[0024] The utility model is further configured as follows: a nut 15 is provided at one end of the rotating shaft 4 , and a threaded fixing nut 16 is provided at the other end, so as to facilitate the rapid installation of the rotating shaft 4 .

[0025] 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. A split-type waterproof current transformer, comprising a transformer housing (1), wherein the transformer housing (1) comprises an upper housing (101) and a lower housing (102), characterized in that: The lower shell (102) is provided with mounting cavities (2) at both ends, and the upper shell (101) is provided with clamping blocks (3) at both ends. The upper shell (101) and the lower shell (102) are plugged together through the mounting cavity (2) and the clamping blocks (3). The upper shell (101) and the lower shell (102) are provided with rotating shafts (4) at both ends. The rotating shafts (4) penetrate the mounting cavity (2) and the clamping blocks (3). After the rotating shaft (4) at one end is removed, the upper shell (101) can swing relative to the lower shell (102) through the rotating shaft (4) at the other end. Telescopic button assemblies (5) are provided on both sides of the upper shell (101). The telescopic button assemblies (5) can be fixed after the upper shell (101) and the lower shell (102) are plugged together.

2. The retractable waterproof current transformer according to claim 1, characterized in that: The telescopic button assembly (5) comprises a first button (501) and a second button (502) which are symmetrically arranged, wherein a pressing portion (6) and a clamping portion (7) are arranged on the first button (501) and the second button (502), wherein a spring (8) is arranged inside the pressing portion (6), wherein one end of the spring (8) abuts against the bottom of the pressing portion (6) of the first button (501), and the other end abuts against the bottom of the second pressing portion (6); and a fixing groove (9) which is plugged into the clamping portion (7) is arranged inside the installation cavity (2).

3. The retractable waterproof current transformer according to claim 2, characterized in that: The installation cavity (2) is provided with an abutting inclined surface (10) on the contact path with the clamping portion (7), and the end surface of the clamping portion (7) is provided with a chamfer (11) matching the abutting inclined surface (10).

4. The retractable waterproof current transformer according to claim 1, characterized in that: An iron core (12) is disposed in the upper shell (101) and the lower shell (102), respectively. A plurality of helical teeth (13) are disposed on the contact surface of the iron core (12). When the upper shell (101) and the lower shell (102) are plugged together, the helical teeth (13) of the iron core (12) mesh with each other.

5. The retractable waterproof current transformer according to claim 1, characterized in that: The upper shell (101) is provided with a sliding groove (14) adapted to the first button (501) and the second button (502), and the sliding groove (14) makes the telescopic button assembly (5) more stable when telescoping.

6. The retractable waterproof current transformer according to claim 1, characterized in that: A nut (15) is provided at one end of the rotating shaft (4), and a threaded fixing nut (16) is provided at the other end.

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