Current transformer bushing

Abstract

The utility model provides a bushing of a current transformer. The current transformer bushing comprises a sleeve, two mounting plates are arranged on the sleeve, through grooves are formed in the outer walls of one sides of the two mounting plates, clamping plates are arranged in the two through grooves, the clamping plates are connected with the mounting plates through clamping mechanisms, connecting blocks are fixedly mounted at the bottoms of the mounting plates, and the connecting blocks are connected with the through grooves through clamping mechanisms. And a threaded rod is rotatably installed on the outer wall of the sleeve, the threaded rod penetrates through the connecting block and is in threaded connection with the connecting block, a sliding rod is fixedly installed on the outer wall of the sleeve, and the sliding rod penetrates through the connecting block and is in sliding connection with the connecting block. The bushing of the current transformer has the advantages of being good in protection effect and capable of improving the connection stability of the terminal and the electric wire.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a current transformer bushing. Background Art

[0002] A current transformer is an instrument that converts a large primary current into a small secondary current for measurement based on the principle of electromagnetic induction. It consists of a closed iron core and a winding. Its primary winding has very few turns and is connected in series in the circuit of the current that needs to be measured. It can be roughly divided into two categories according to its different uses. One is to provide the current information of the power grid to measurement and metering devices within the normal working current range. The other is to provide the fault current information of the power grid to relay protection and other devices under the condition of a power grid fault.

[0003] During use, the current transformer needs to be connected to external wires through terminals. However, the connection between the current terminals and wires is generally in direct contact with the external environment, which is easily affected by external dust and causes short circuits, affecting the measurement and protection effects of the current transformer.

[0004] Therefore, it is necessary to provide a current transformer bushing to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a current transformer bushing which has good protection effect and can improve the stability of connection between terminals and wires.

[0006] In order to solve the above technical problems, the current transformer bushing provided by the utility model includes: a sleeve, two mounting plates are arranged on the sleeve, through grooves are opened on the outer walls of one side of the two mounting plates, clamps are arranged in the two through grooves, the clamps are connected to the mounting plates through a clamping mechanism, a connecting block is fixedly installed on the bottom of the mounting plate, a threaded rod is rotatably installed on the outer wall of the sleeve, the threaded rod passes through the connecting block and is threadedly connected to the connecting block, and a sliding rod is fixedly installed on the outer wall of the sleeve, the sliding rod passes through the connecting block and is slidably connected to the connecting block.

[0007] Preferably, a mounting ring is fixedly mounted on the outer portion of the sleeve, and four mounting holes arranged in a ring shape are opened on the top of the mounting ring.

[0008] Preferably, a card slot is provided on the outer wall of one side of the mounting plate, and the holding mechanism includes a fixed block, a hinge block, a sliding groove, a pull hook and a pulling spring, the fixed block is fixedly mounted on the outer wall of one side of the clamping plate, the hinge block is rotatably mounted on the fixed block, the sliding groove is provided on the outer wall of one side of the hinge block, the pull hook is arranged on one side of the hinge block, one side of the pull hook extends into the sliding groove and is slidably connected to the sliding groove, the pulling spring is fixedly mounted on the inner wall of one side of the sliding groove, and the other end of the pull spring is fixedly connected to the outer wall of one side of the pull hook.

[0009] Preferably, an arc-shaped groove is formed on the top of the clamping plate, and a rubber plate is provided on the inner wall of the arc-shaped groove.

[0010] Preferably, the sleeve is provided with a plurality of annular openings, a plurality of annular sleeve frames are fixedly mounted on the outer wall of the sleeve, the plurality of annular sleeve frames are respectively adapted to the plurality of annular openings, and a plurality of air holes are provided at the bottom of the plurality of annular sleeve frames.

[0011] Preferably, the top of the annular frame is arranged as an inclined surface.

[0012] Compared with the related art, the current transformer bushing provided by the utility model has the following beneficial effects:

[0013] The utility model provides a current transformer bushing, which can protect the connection between the terminal and the wire through the sleeve and two mounting plates, thereby improving the connection safety and stability between the current transformer and the external wire;

[0014] Through the arrangement of the threaded rod, the sliding rod, the connecting block and the two mounting plates, the two clamping plates can clamp the wires, thereby ensuring the stability of the wires and improving the connection stability between the current transformer and the external wires;

[0015] Through the setting of the card slot, hinge block, sliding slot, hook and pull spring, different clamping plates can be quickly replaced to adapt to different wire sizes and improve the use range of the bushing;

[0016] By setting the annular sleeve frame and the air holes, the air permeability of the bushing can be guaranteed, and the heat dissipation effect of the connection between the terminal and the wire can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional structural schematic diagram of a current transformer bushing provided by the utility model;

[0018] Figure 2 Another three-dimensional structural schematic diagram of the current transformer bushing provided by the utility model;

[0019] Figure 3A schematic diagram of the three-dimensional connection structure of the clamping plate and the mounting plate in the current transformer bushing provided by the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the three-dimensional connection structure of the connection block and the draw hook in the current transformer bushing.

[0021] Numbers in the figure: 1. sleeve; 2. annular sleeve frame; 3. air hole; 4. mounting ring; 5. mounting plate; 6. connecting block; 7. threaded rod; 8. sliding rod; 9. through groove; 10. slot; 11. clamping plate; 12. rubber plate; 13. fixing block; 14. hinge block; 15. sliding groove; 16. hook; 17. pulling spring. DETAILED DESCRIPTION

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

[0023] Please refer to Figure 1-Figure 4 ,in, Figure 1 A three-dimensional structural schematic diagram of a current transformer bushing provided by the utility model; Figure 2 Another three-dimensional structural schematic diagram of the current transformer bushing provided by the utility model; Figure 3 A schematic diagram of the three-dimensional connection structure of the clamping plate and the mounting plate in the current transformer bushing provided by the utility model; Figure 4 The utility model provides a schematic diagram of the three-dimensional connection structure of the connection block and the hook in the current transformer bushing. The current transformer bushing comprises: a sleeve 1, a mounting ring 4 is fixedly installed on the outer side of the sleeve 1, and four mounting holes arranged in a ring shape are provided on the top of the mounting ring 4 to facilitate the installation of the sleeve 1, two mounting plates 5 are provided on the sleeve 1, and through grooves 9 are provided on the outer walls of one side of the two mounting plates 5, and clamping plates 11 are provided in the two through grooves 9, and the clamping plates 11 are connected to the mounting plates 5 through a clamping mechanism, and an arc groove is provided on the top of the clamping plates 11, and a rubber plate 12 is provided on the inner wall of the arc groove. Through the setting of the rubber plate 12, the damage to the clamping of the wire can be reduced and the protection of the wire can be improved. A connecting block 6 is fixedly installed on the bottom of the mounting plate 5, and a threaded rod 7 is rotatably installed on the outer wall of the sleeve 1, and the threaded rod 7 penetrates the connecting block 6 and is threadedly connected to the connecting block 6, and a sliding rod 8 is fixedly installed on the outer wall of the sleeve 1, and the sliding rod 8 penetrates the connecting block 6 and is slidably connected to the connecting block 6.

[0024] A card slot 10 is provided on the outer wall of one side of the mounting plate 5, and the holding mechanism includes a fixed block 13, a hinge block 14, a sliding groove 15, a hook 16 and a pulling spring 17. The fixed block 13 is fixedly mounted on the outer wall of one side of the clamping plate 11, and the hinge block 14 is rotatably mounted on the fixed block 13. The sliding groove 15 is provided on the outer wall of one side of the hinge block 14. The hook 16 is arranged on one side of the hinge block 14. One side of the hook 16 extends into the sliding groove 15 and is slidably connected to the sliding groove 15. The pulling spring 17 is fixedly mounted on the inner wall of one side of the sliding groove 15, and the other end of the pulling spring 17 is fixedly connected to the outer wall of one side of the hook 16.

[0025] A plurality of annular openings are provided on the sleeve 1, and a plurality of annular sleeve frames 2 are fixedly installed on the outer wall of the sleeve 1. The plurality of annular sleeve frames 2 are respectively adapted to the plurality of annular openings. A plurality of air holes 3 are provided on the bottom of the plurality of annular sleeve frames 2. The top of the annular sleeve frames 2 is set as an inclined surface. The air holes 3 can ensure the heat dissipation effect in the sleeve 1. The setting of the inclined surface can prevent dust from entering the sleeve 1 through the air holes 3.

[0026] In this embodiment:

[0027] When in use, the sleeve 1 can be installed around the terminal of the current transformer through the mounting ring 4 and the bolts. When connecting with external wires, select a suitable clamping plate 11 and install it on the mounting plate 5. The installation is to pull the hook 16 to drive the hinge block 14 to rotate, and extend one side of the hook 16 into the slot 10, thereby completing the installation of the clamping plate 11. The operation is simple and convenient. After the wire is connected to the terminal, the threaded rod 7 can be rotated to drive the connecting block 6 and the mounting plate 5 to move, and the wires are fixed by the two mounting plates 5, thereby ensuring the connection stability between the wires and the terminals. At the same time, the top of the sleeve 1 can be shielded by the two mounting plates 5 to prevent dust from affecting the connection between the terminal and the wire.

[0028] Compared with the related art, the current transformer bushing provided by the utility model has the following beneficial effects:

[0029] The sleeve 1 and the two mounting plates 5 can be used to protect the connection between the terminal and the wire, thereby improving the safety and stability of the connection between the current transformer and the external wire.

[0030] Through the arrangement of the threaded rod 7, the sliding rod 8, the connecting block 6 and the two mounting plates 5, the two clamping plates 11 can clamp the wires, thereby ensuring the stability of the wires and improving the connection stability between the current transformer and the external wires;

[0031] By setting the card slot 10, the hinge block 14, the sliding slot 15, the hook 16 and the pull spring 17, different clamping plates 11 can be quickly replaced to adapt to different wire sizes and improve the use range of the bushing;

[0032] By providing the annular sleeve frame 2 and the air holes 3, the air permeability of the bushing can be ensured, and the heat dissipation effect of the connection between the terminal and the wire can be ensured.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A current transformer bushing, comprising: The sleeve is characterized in that two mounting plates are provided on the sleeve, and through grooves are opened on the outer walls of one side of the two mounting plates, and clamps are provided in the two through grooves, and the clamps are connected to the mounting plates through a clamping mechanism, and a connecting block is fixedly installed on the bottom of the mounting plate, and a threaded rod is rotatably installed on the outer wall of the sleeve, and the threaded rod passes through the connecting block and is threadedly connected to the connecting block, and a sliding rod is fixedly installed on the outer wall of the sleeve, and the sliding rod passes through the connecting block and is slidably connected to the connecting block.

2. The current transformer bushing according to claim 1, characterized in that: A mounting ring is fixedly mounted on the outer portion of the sleeve, and four mounting holes arranged in a ring shape are opened on the top of the mounting ring.

3. The current transformer bushing according to claim 1, characterized in that: A card slot is provided on the outer wall of one side of the mounting plate, and the holding mechanism includes a fixed block, a hinge block, a sliding groove, a pull hook and a pulling spring. The fixed block is fixedly installed on the outer wall of one side of the clamping plate, and the hinge block is rotatably installed on the fixed block. The sliding groove is provided on the outer wall of one side of the hinge block, and the pull hook is arranged on one side of the hinge block. One side of the pull hook extends into the sliding groove and is slidably connected to the sliding groove. The pulling spring is fixedly installed on the inner wall of one side of the sliding groove, and the other end of the pull spring is fixedly connected to the outer wall of one side of the pull hook.

4. The current transformer bushing according to claim 3, characterized in that: An arc-shaped groove is formed on the top of the clamping plate, and a rubber plate is arranged on the inner wall of the arc-shaped groove.

5. The current transformer bushing according to claim 1, characterized in that: The sleeve is provided with a plurality of annular openings, and a plurality of annular sleeve frames are fixedly mounted on the outer wall of the sleeve. The plurality of annular sleeve frames are respectively adapted to the plurality of annular openings, and a plurality of air holes are provided at the bottom of the plurality of annular sleeve frames.

6. The current transformer bushing according to claim 5, characterized in that: The top of the annular frame is arranged as an inclined surface.

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