Current transformer slot type terminal box

Abstract

The utility model discloses a current transformer slot type terminal box, and specifically relates to the current transformer field, the current transformer slot type terminal box comprises a terminal box, one side of the terminal box is fixedly connected with a connecting plate, one end of the terminal box close to the connecting plate is provided with a cover plate in an inserting manner, one side of the cover plate is provided with a clamping groove, an inner cavity of the clamping groove is provided with a sealing gasket, and the inner cavity of the clamping groove is provided with a through hole. Positioning blocks are symmetrically and fixedly connected to the two ends of the top of one side of the connecting plate, positioning grooves are formed in the positions, corresponding to the positioning blocks, of one side of an inner cavity of the cover plate, and openings are formed in the bottoms of inner cavities of the clamping grooves. The connecting plate can be conveniently inserted into the cover plate through the opening, the cover plate can be conveniently mounted and limited, the mounting position of the cover plate can be limited through the matching of the positioning block and the positioning groove, and the cover plate can be conveniently fixed through the extrusion block. The fastening screw can be prevented from falling off and losing in the carrying process during outdoor installation, and the assembling and using effects are not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, and more specifically, to a slot-type terminal box for a current transformer. 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. The current transformer consists of a closed iron core and a winding. Its primary winding has very few turns and is connected in series to the current line that needs to be measured. Most of the existing outdoor transformer terminal boxes use a flat sealing structure, that is, the transformer terminal box is a flange surface, and the sealing element is deformed and sealed by the tightening force applied to the flange baffle by bolts.

[0003] The utility model with Chinese patent application number CN202223595917.X discloses a current transformer slot-type terminal box structure, including a terminal box, a terminal box cover, fasteners and a foam sealing pad. The terminal box cover is provided with a slot for inserting the terminal box, the flange of the terminal box and the terminal box cover are locked and fixed by fasteners, and a foam sealing pad is placed between the flange and the terminal box cover. In the above manner, the utility model has a simple structure, can be quickly installed, can effectively prevent rainwater from penetrating, and prolongs the service life of the current transformer;

[0004] However, in actual use, when the slot-type terminal box is used, bolts are passed through the cover plate and the connecting plate, so that the cover plate and the connecting plate squeeze the sealing gasket on one side of the cover plate to achieve installation and fixation and play a role of sealing and waterproofing. During installation and production, the bolts are separated from the cover plate, which is easy to be lost when installed outdoors, resulting in inability to install and fix. Moreover, when the slot-type terminal box is small in size, it is inconvenient to install and use due to the small size of the bolts, which affects the installation and use effect. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides a current transformer slot-type terminal box to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: a current transformer slot-type terminal box, comprising a terminal box, a connecting plate fixedly connected to one side of the terminal box, a cover plate inserted at one end of the terminal box close to the connecting plate, a card slot opened on one side of the cover plate, a sealing gasket provided in the inner cavity of the card slot, and positioning blocks symmetrically fixedly connected to both ends of the top of one side of the connecting plate;

[0007] It can be seen that the cover plate can be clamped from the top of the connecting plate to the middle of the connecting plate through the card slot to wrap the connecting plate, which can play a waterproof role, facilitate connection and installation, and the provided sealing pad can play a sealing role, and the position is limited by the positioning block to improve the use effect;

[0008] A positioning groove is provided at a position corresponding to the positioning block on one side of the inner cavity of the cover plate, an opening is provided at the bottom opening of the inner cavity of the card slot, and fastening screws are symmetrically inserted around the cover plate near the terminal box, and the two ends of the fastening screws are respectively fixedly connected with a rotating screw head and an extrusion block;

[0009] It can be seen that through the cooperation of the positioning block and the positioning groove, the installation position of the cover plate can be limited conveniently, the position of the cover plate can be initially fixed, and the cover plate can be conveniently clamped in the middle of the connecting plate through the opening, which is convenient for the installation of the cover plate. The fastening screw is controlled by turning the rotating screw head to drive the extrusion block to extrude the connecting plate, and through cooperation with the sealing gasket, the sealing effect is achieved, thereby improving the use effect.

[0010] Preferably, the card slot has the same size as the connecting plate, the connecting plate is arranged inside the card slot, and the inner width of the card slot is greater than the thickness of the connecting plate;

[0011] It can be seen that the provided card slot can facilitate the limiting of the connection plate and the installation and fixing of the cover plate, thereby improving the use effect.

[0012] Preferably, a side wall of the positioning block is arranged in an arc shape, the positioning groove is adapted to the positioning block, and the positioning block is arranged inside the positioning groove;

[0013] It can be seen that, through the cooperation of the positioning block and the positioning groove, the installation position of the cover plate can be preliminarily positioned, which facilitates the installation and fixation of the cover plate.

[0014] Preferably, the sealing gasket is in contact with the wall of the connecting plate, and the cross-sectional shape of the opening is set to a trumpet-shaped structure;

[0015] It can be seen that the sealing gasket can improve the sealing strength between the connecting plate and the cover plate, improve the waterproof effect, and the connecting plate can be easily inserted into the slot through the opening, so as to install and fix the cover plate.

[0016] Preferably, the fastening screw is threadedly connected to a side wall of the cover plate, and the rotating screw head is arranged on a side of the cover plate away from the connecting plate;

[0017] It can be seen that by rotating the screw head to control the movement of the fastening screw, one side of the connecting plate can be squeezed, which makes it easier to control the chicken to stick close to the wall of the connecting plate and improve the installation sealing strength.

[0018] Preferably, the extrusion block is arranged inside the card slot, and the extrusion block is arranged on a side of the connecting plate away from the positioning block;

[0019] It can be seen that by pushing the connecting plate with the extrusion block, the fitting strength between the cover plate and the connecting plate can be improved, thereby improving the strength of the positioning block inserted into the positioning groove, improving the connection strength of the cover plate, and improving the use effect.

[0020] Preferably, the material of the extrusion block is set to be rubber material, and a placement groove is opened at a position of the inner cavity of the card slot corresponding to the extrusion block, and the card slot is arranged inside the placement groove;

[0021] It can be seen that the extrusion block can avoid extrusion damage to the connecting plate, play a protective role, and avoid excessive extrusion strength of the connecting plate and the cover plate on the sealing gasket, which may cause damage to the sealing gasket, and play a buffering role. By placing the groove, the installation and use of the connecting plate will not be affected, thereby improving the use effect.

[0022] Technical effects and advantages of the utility model:

[0023] 1. The utility model firstly makes it convenient to insert the connecting plate into the interior of the cover plate through the provided opening, so as to facilitate the installation and positioning of the cover plate. The cooperation of the provided positioning block and the positioning groove can limit the installation position of the cover plate, and the provided extrusion block can prevent the fastening screw from falling and being lost during carrying during outdoor installation, thereby affecting the assembly and use effect.

[0024] 2. The utility model also controls the extrusion block to extrude the connection plate by rotating the rotating screw head through the fastening screw rod, and can extrude the sealing gasket by cooperating with the cover plate, thereby improving the sealing strength of the installation, and at the same time increasing the strength of the connection between the positioning block and the positioning groove, thereby improving the installation fixing strength. The material of the extrusion block is set to be rubber material, thereby avoiding extrusion damage to the connection plate, thereby playing a protective role;

[0025] In summary, through the mutual influence of the above-mentioned multiple effects, the fastening screw can be connected to the cover plate. At the same time, it is only necessary to rotate the screw head to push and squeeze the connecting plate, which is convenient for installation and fixation. It can also prevent the fastening screw from falling and being lost during carrying when installed outdoors, thereby improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0027] Figure 2 It is a schematic diagram of the connection cross-section structure of the cover plate and the terminal box of the utility model.

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the cover plate of the utility model.

[0029] The figures are marked as follows: 1. terminal box; 2. cover plate; 3. connecting plate; 4. sealing gasket; 5. positioning block; 6. positioning groove; 7. slot; 8. opening; 9. fastening screw; 10. rotating screw head; 11. extrusion block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] As attached Figure 1-3 A current transformer slot-type terminal box shown in the figure comprises a terminal box 1, a connecting plate 3 is fixedly connected to one side of the terminal box 1, a cover plate 2 is inserted at one end of the terminal box 1 close to the connecting plate 3, a card slot 7 is opened on one side of the cover plate 2, a sealing gasket 4 is arranged in the inner cavity of the card slot 7, and positioning blocks 5 are symmetrically fixedly connected to both ends of the top of one side of the connecting plate 3;

[0032] A positioning groove 6 is provided at a position corresponding to the positioning block 5 on one side of the inner cavity of the cover plate 2, an opening 8 is provided at the bottom opening of the inner cavity of the slot 7, and fastening screws 9 are symmetrically inserted around the cover plate 2 near the terminal box 1, and the two ends of the fastening screws 9 are respectively fixedly connected with a rotating screw head 10 and an extrusion block 11.

[0033] As attached Figure 1-3As shown, the card slot 7 has the same size as the connecting plate 3, the connecting plate 3 is arranged inside the card slot 7, the inner cavity width of the card slot 7 is greater than the thickness of the connecting plate 3, one side wall of the positioning block 5 is arranged in an arc shape, the positioning slot 6 is adapted to the positioning block 5, the positioning block 5 is arranged inside the positioning slot 6, the sealing gasket 4 fits the wall of the connecting plate 3, the cross-sectional shape of the opening 8 is arranged in a trumpet-shaped structure, the fastening screw 9 is threadedly connected to one side wall of the cover plate 2, the rotating screw head 10 is arranged on the side of the cover plate 2 away from the connecting plate 3, the extrusion block 11 is arranged inside the card slot 7, the extrusion block 11 is arranged on the side of the connecting plate 3 away from the positioning block 5, and the material of the extrusion block 11 is set to rubber material, A placement groove is provided at a position corresponding to the inner cavity of the card slot 7 and the extrusion block 11. The card slot 7 is arranged inside the placement groove so that the movement of the fastening screw 9 can be controlled by rotating the rotating screw head 10. The connection plate 3 can be pushed by the extrusion block 11, and the sealing gasket 4 can be squeezed by cooperating with the cover plate 2 to improve the sealing strength of the connection plate 3 and the cover plate 2, thereby improving the waterproof effect. At the same time, the installation position of the cover plate 2 can be preliminarily positioned by cooperating with the positioning block 5 and the positioning groove 6, and the connection strength of the positioning block 5 and the positioning groove 6 can be improved by squeezing the sealing gasket 4 by the second connection plate 3, thereby improving the installation strength of the cover plate 2 and improving the use effect.

[0034] The opening 8 can be used to conveniently insert the connecting plate 3 into the slot 7, so as to install and fix the cover plate 2. The material of the extrusion block 11 is set to rubber material to avoid extrusion damage to the connecting plate 3, thereby playing a protective role, and avoiding excessive extrusion strength of the connecting plate 3 and the cover plate 2 on the sealing gasket 4, which may cause damage to the sealing gasket 4, thereby playing a buffering role. At the same time, the extrusion block 11 can prevent the fastening screw 9 from falling and being lost during disassembly, thereby playing an anti-falling role. The placement groove can also prevent the installation and use of the connecting plate 3 from being affected, thereby improving the use effect.

[0035] Working principle of the utility model: when in use, the cover plate 2 is inserted from the top of the connecting plate 3, so that the connecting plate 3 enters the inside of the card slot 7 through the opening 8, until the positioning block 5 is stuck in the inside of the positioning slot 6, the cover plate 2 can be initially limited, and then the rotating screw head 10 is turned to control the extrusion block 11 to push the connecting plate 3 through the tightening screw 9, and the sealing gasket 4 can be pressurized by cooperating with the cover plate 2 to improve the sealing strength of the cover plate 2 and the connecting plate 3, and at the same time, the fixing strength of the positioning block 5 inserted into the positioning slot 6 can be improved, so as to limit and fix the installation position of the cover plate 2 and improve the fixing strength;

[0036] When disassembling, it is only necessary to turn the rotating screw head 10 to loosen the extrusion on the connecting plate 3, and pull the cover plate 2 to move the positioning block 5 out from the inside of the positioning groove 6, so that the cover plate 2 can be disassembled, and the extrusion block 11 can be used to prevent the fastening screw 9 from falling and being lost, thereby improving the installation and connection effect.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A current transformer slot-type terminal box, comprising a terminal box (1), characterized in that: A connecting plate (3) is fixedly connected to one side of the terminal box (1); a cover plate (2) is inserted into one end of the terminal box (1) close to the connecting plate (3); a card slot (7) is provided on one side of the cover plate (2); a sealing gasket (4) is provided in the inner cavity of the card slot (7); and positioning blocks (5) are symmetrically fixedly connected to both ends of the top of one side of the connecting plate (3); A positioning groove (6) is provided at a position corresponding to the positioning block (5) on one side of the inner cavity of the cover plate (2), an opening (8) is provided at the bottom opening of the inner cavity of the slot (7), and fastening screws (9) are symmetrically inserted around the cover plate (2) near the terminal box (1), and the two ends of the fastening screws (9) are respectively fixedly connected to a rotating screw head (10) and an extrusion block (11).

2. A current transformer slot type terminal box according to claim 1, characterized in that: The card slot (7) has the same size as the connecting plate (3); the connecting plate (3) is arranged inside the card slot (7); and the inner cavity width of the card slot (7) is greater than the thickness of the connecting plate (3).

3. A current transformer slot type terminal box according to claim 1, characterized in that: A side wall of the positioning block (5) is arranged in an arc shape, the positioning groove (6) is adapted to the positioning block (5), and the positioning block (5) is arranged inside the positioning groove (6).

4. A current transformer slot type terminal box according to claim 1, characterized in that: The sealing pad (4) is fitted with the wall of the connecting plate (3), and the cross-sectional shape of the opening (8) is set to a trumpet-shaped structure.

5. A current transformer slot type terminal box according to claim 1, characterized in that: The fastening screw (9) is threadedly connected to a side wall of the cover plate (2), and the rotating screw head (10) is arranged on a side of the cover plate (2) away from the connecting plate (3).

6. A current transformer slot type terminal box according to claim 1, characterized in that: The extrusion block (11) is arranged inside the clamping groove (7), and the extrusion block (11) is arranged on a side of the connecting plate (3) away from the positioning block (5).

7. A current transformer slot-type terminal box according to claim 1, characterized in that: The material of the extrusion block (11) is set to be a rubber material, and a placement groove is provided in the inner cavity of the card slot (7) at a position corresponding to the extrusion block (11), and the card slot (7) is arranged inside the placement groove.

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