Optical fiber current transformer

Abstract

The utility model relates to the technical field of electric power measurement, and discloses an optical fiber current transformer which comprises a protective shell. A positioning structure capable of adjusting the installation position is arranged on the wall face of a lug plate of the protective shell, the positioning structure comprises an adjusting channel, a plurality of positioning grooves, a pressing plate and a thrust protrusion, the adjusting channel is formed in the top face of the protective shell, the positioning grooves communicated with the adjusting channel are further formed in the top face of the protective shell, and the thrust protrusion is fixedly connected with the pressing plate. The pressing plate is locked and fixed through the bolt, the bolt penetrates through the pressing plate, the thrust protrusion is clamped into the positioning groove in the corresponding position, then the relative position of the pressing plate and the protective shell is locked, the pressing plate and the protective shell can be pressed and fixed by fastening the bolt, the position of the protective shell can be adjusted relative to the pressing plate, and therefore installation and debugging are convenient. And especially for the threading of optical fibers, the installation flexibility is better.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power measurement, in particular to an optical fiber current transformer. Background Art

[0002] The prior art discloses a fiber optic current transformer (CN201721113550.X), which includes a cast body, a copper terminal, a metal base plate and a terminal box;

[0003] In the prior art, installation is mainly achieved by locking the shell with the installation groove by bolts. When installing the entire device, the pressing force provided by the bolts is required to achieve anti-slip. For electronic components working with power on, there will be certain vibrations, which will affect the installation stability. The direct locking and fixing method of the bolts makes the relative installation position of the shell have high limitations, which is inconvenient for the threading of optical fibers. Therefore, there is still room for optimization of the shell installation and locking method in the prior art.

[0004] To this end, we propose a fiber optic current transformer. Utility Model Content

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a fiber optic current transformer.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an optical fiber current transformer, comprising a protective shell; a junction box fixedly mounted on the wall of the protective shell for connecting optical fibers, the bottom surface of the protective shell being integrally formed with an ear plate for installation, the ear plate wall of the protective shell being provided with a positioning structure with an adjustable installation position, the positioning structure comprising an adjustment channel, a positioning groove, a pressure plate and a thrust protrusion, the top surface of the protective shell being provided with an adjustment channel, the top surface of the protective shell being further provided with a plurality of positioning grooves connected to the adjustment channel, the thrust protrusion being fixedly connected to the pressure plate, and the pressure plate being locked and fixed by bolts.

[0007] As a preferred embodiment of the present invention, the adjustment channel forms a rectangular groove structure, the positioning groove is opened on the top surface of the protective shell and extends toward the bottom, and the depth of the positioning groove is less than the depth of the adjustment channel.

[0008] As a preferred embodiment of the present invention, the inner wall surfaces on both sides of the protective shell located in the adjustment channel are provided with a plurality of positioning grooves, and the depth of the adjustment channel is equal to the thickness of the protective shell.

[0009] As a preferred embodiment of the utility model, the positioning groove forms a groove with a semicircular horizontal cross-section, the thrust protrusion and the positioning groove are used in conjunction with each other, two identical thrust protrusions are symmetrically arranged on the bottom surface of the pressure plate, and the two thrust protrusions are respectively embedded in the corresponding positioning grooves to lock the position of the pressure plate.

[0010] As a preferred embodiment of the utility model, the pressing plate forms a rectangular plate structure, a circular sunken groove for installing bolts is provided on the top surface of the pressing plate, and the width of the pressing plate is greater than the width of the adjustment channel.

[0011] As a preferred embodiment of the present invention, the positioning structure further comprises an extension body and a deformation groove, the extension body is fixedly connected to the pressure plate, a plurality of deformation grooves are provided on the wall surface of the extension body, and the extension body can be deformed by bolt compression.

[0012] As a preferred embodiment of the utility model, the extension body forms a circular tube structure, the deformation groove is opened on the lower end face of the extension body, the end face of the deformation groove is opened in a circular array to form a plurality of extension bodies, and the end face of the extension body forms a contact surface through the plurality of deformation grooves.

[0013] Beneficial Effects

[0014] The utility model provides a fiber optic current transformer, which has the following beneficial effects:

[0015] 1. This fiber optic current transformer has at least four adjustment channels on the top surface of the protective shell, and a bolt is placed in each adjustment channel. The bolt and the device are locked to press and fix the protective shell to achieve installation. When installing the protective shell, the bolt is passed through the pressure plate so that the thrust protrusion is inserted into the positioning groove at the corresponding position, thereby locking the relative position of the pressure plate and the protective shell. The tightening bolt can achieve the compression and fixation of the pressure plate and the protective shell, and the protective shell can be adjusted relative to the pressure plate, so that installation and debugging, especially for the threading of optical fibers, have better installation flexibility, and at the same time have better stability and anti-deviation effect after installation and locking.

[0016] 2. This fiber optic current transformer is provided with an extension body made of rubber. The extension body has a plurality of deformation grooves. When the pressure plate is squeezed and fixed in position by bolts, the lower end surface of the extension body can contact the device, so that elastic contact is formed between the pressure plate and the device. The extension body with deformation grooves has a better deformation effect, can suppress the resonance and displacement of the pressure plate, and ensure the stability of locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is one of the three-dimensional diagrams of the utility model;

[0018] Figure 2 This is the second stereogram of the utility model;

[0019] Figure 3 A schematic diagram of an adjustment channel for the protective housing of the utility model;

[0020] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is one of the three-dimensional diagrams of the pressing plate of the utility model;

[0022] Figure 6 This is the second three-dimensional diagram of the pressure plate.

[0023] Legend: 10, protective housing; 11, junction box; 20, adjustment channel; 21, positioning groove; 22, pressure plate; 23, thrust protrusion; 30, extension body; 31, deformation groove. DETAILED DESCRIPTION

[0024] A fiber optic current transformer, such as Figure 1 and Figure 2 As shown, it includes a protective shell 10; a junction box 11 fixedly installed on the wall of the protective shell 10 for connecting optical fibers, and an ear plate for installation is integrally formed on the bottom surface of the protective shell 10. In this solution, the protective shell 10 forms a hollow shell structure, and a sensitive ring is provided inside the protective shell 10. The optical fiber is connected from the junction box 11 to the cavity of the protective shell 10 and is wound around the surface of the sensitive ring. Of course, a connecting steel bar and terminals for power connection are also installed in the cavity of the protective shell 10. The specific connection method and control method have been disclosed in detail in the prior art and will not be repeated here.

[0025] like Figure 3 , Figure 4 and Figure 5As shown, the ear plate wall surface of the protective shell 10 is provided with a positioning structure with an adjustable installation position, the positioning structure includes an adjusting channel 20, a positioning groove 21, a pressure plate 22 and a thrust protrusion 23, the top surface of the protective shell 10 is provided with an adjusting channel 20, and the top surface of the protective shell 10 is also provided with a plurality of positioning grooves 21 connected to the adjusting channel 20, the thrust protrusion 23 is fixedly connected to the pressure plate 22, and the pressure plate 22 is locked and fixed by bolts, the adjusting channel 20 forms a rectangular groove structure, the positioning groove 21 is provided on the top surface of the protective shell 10 and extends toward the bottom, the depth of the positioning groove 21 is less than the depth of the adjusting channel 20, the inner wall surfaces on both sides of the protective shell 10 located in the adjusting channel 20 are provided with a plurality of positioning grooves 21, the depth of the adjusting channel 20 is equal to the thickness of the protective shell 10, the positioning groove 21 forms a groove with a semicircular horizontal cross-section, the thrust protrusion 23 and the positioning groove 21 are used in conjunction with each other, and two identical thrust protrusions 23 are symmetrically arranged on the bottom surface of the pressure plate 22 The two thrust protrusions 23 are respectively embedded in the corresponding positioning grooves 21 to lock the position of the pressure plate 22. The pressure plate 22 forms a rectangular plate structure. The top surface of the pressure plate 22 is provided with a circular sunken groove for installing bolts. The width of the pressure plate 22 is greater than the width of the adjustment channel 20. In this solution, based on the improvement made on the basis of the prior art, at least four adjustment channels 20 are provided on the top surface of the protective shell 10. A bolt is placed in each adjustment channel 20. The bolts and the equipment are locked to press and fix the protective shell 10 to achieve installation. When installing the protective shell 10, the bolts are passed through the pressure plate 22 so that the thrust protrusions 23 are inserted into the positioning grooves 21 at the corresponding positions, thereby locking the relative positions of the pressure plate 22 and the protective shell 10. Tightening the bolts can realize the compression and fixation of the pressure plate 22 and the protective shell 10, and the protective shell 10 can be adjusted relative to the pressure plate 22, so that installation and debugging, especially for the threading of optical fibers, have better installation flexibility.

[0026] like Figure 5 and Figure 6 As shown, the positioning structure also includes an extension body 30 and a deformation groove 31. The extension body 30 is fixedly connected to the pressure plate 22. A plurality of deformation grooves 31 are provided on the wall surface of the extension body 30. The extension body 30 can be deformed by bolt compression. The extension body 30 forms a circular tube structure. The deformation groove 31 is provided on the lower end surface of the extension body 30. The end surface of the deformation groove 31 is provided with a plurality of extension bodies 30 in a ring array. The end surface of the extension body 30 forms a contact surface through a plurality of deformation grooves 31. On the basis of achieving the above-mentioned effect, an extension body 30 is provided. The extension body 30 is made of rubber. The extension body 30 with a plurality of deformation grooves 31 can resist the equipment when the pressure plate 22 is fixed in position by bolt compression. Therefore, elastic contact is formed between the pressure plate 22 and the equipment. The extension body 30 with the deformation groove 31 has a better deformation effect, can suppress the resonance and displacement of the pressure plate 22, and ensure the stability of the locking.

[0027] The working principle of the utility model is as follows: the bolts are passed through the pressure plate 22 so that the thrust protrusions 23 are inserted into the positioning grooves 21 at the corresponding positions. The extension body 30 is made of rubber. The extension body 30 is provided with a plurality of deformation grooves 31. When the pressure plate 22 is squeezed and fixed in position by the bolts, the lower end surface of the extension body 30 can contact the equipment, so that elastic contact is formed between the pressure plate 22 and the equipment, thereby suppressing the resonance and displacement of the pressure plate 22. The bolts press and fix the pressure plate 22 and the protective shell 10 to achieve installation.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An optical fiber current transformer, comprising a protective housing (10); a junction box (11) fixedly mounted on the wall of the protective housing (10) for connecting optical fibers, the bottom surface of the protective housing (10) being integrally formed with an ear plate for mounting, characterized in that: The ear plate wall surface of the protective shell (10) is provided with a positioning structure with an adjustable installation position, and the positioning structure includes an adjustment channel (20), a positioning groove (21), a pressure plate (22) and a thrust protrusion (23). The top surface of the protective shell (10) is provided with an adjustment channel (20), and the top surface of the protective shell (10) is also provided with a plurality of positioning grooves (21) connected to the adjustment channel (20). The thrust protrusion (23) is fixedly connected to the pressure plate (22), and the pressure plate (22) is locked and fixed by bolts.

2. The optical fiber current transformer according to claim 1, characterized in that: The adjustment channel (20) forms a rectangular groove structure, the positioning groove (21) is opened on the top surface of the protective shell (10) and extends toward the bottom, and the depth of the positioning groove (21) is less than the depth of the adjustment channel (20).

3. The optical fiber current transformer according to claim 1, characterized in that: The inner wall surfaces of both sides of the protective shell (10) located in the adjustment channel (20) are provided with a plurality of positioning grooves (21), and the depth of the adjustment channel (20) is equal to the thickness of the protective shell (10).

4. The optical fiber current transformer according to claim 1, characterized in that: The positioning groove (21) is formed into a groove with a semicircular horizontal cross section. The thrust protrusion (23) and the positioning groove (21) are used in cooperation with each other. Two identical thrust protrusions (23) are symmetrically arranged on the bottom surface of the pressure plate (22). The two thrust protrusions (23) are respectively embedded in the corresponding positioning grooves (21) to lock the position of the pressure plate (22).

5. The optical fiber current transformer according to claim 1, characterized in that: The pressing plate (22) forms a rectangular plate structure, and a circular sunken groove for installing bolts is provided on the top surface of the pressing plate (22). The width of the pressing plate (22) is greater than the width of the adjusting channel (20).

6. The optical fiber current transformer according to claim 1, characterized in that: The positioning structure also includes an extension body (30) and a deformation groove (31). The extension body (30) is fixedly connected to the pressure plate (22). A plurality of deformation grooves (31) are provided on the wall surface of the extension body (30). The extension body (30) can be deformed by bolt compression.

7. The optical fiber current transformer according to claim 6, characterized in that: The extension body (30) forms a circular tube structure, the deformation groove (31) is provided on the lower end surface of the extension body (30), the end surface of the deformation groove (31) is provided with a plurality of extension bodies (30) in a circular array, and the end surface of the extension body (30) forms a contact surface through the plurality of deformation grooves (31).

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