Electronic current transformer

Abstract

The utility model relates to the technical field of current transformers, in particular to an electronic current transformer. The current transformer mainly aims at solving the problems that after an existing current transformer is installed, a cable penetrates through an annular iron core of the current transformer, so that the arrangement path of the cable needs to be arranged according to the installation position of the current transformer, and the position of the current transformer is difficult to adjust after the current transformer is installed; according to the technical scheme, the cable detection device comprises a positioning plate, a protective shell, an annular electromagnetic core and a Rogowski coil, and the top of the positioning plate is provided with an auxiliary cylinder. According to the utility model, the angles and extension lengths of the protective shell, the annular electromagnetic core and the Rogowski coil are adjusted, so that the installation of the cable is prevented from being influenced after the installation is completed, and the influence on the accuracy of subsequent cable detection caused by the error of the cooperation is prevented.

Description

Technical Field

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

[0002] An electronic current transformer is a sensor used to measure current, and its function is similar to that of a traditional current transformer. Electronic current transformers are used in various power systems to measure and monitor parameters such as the magnitude, direction, and phase of current in a circuit. Nowadays, electronic current transformers are usually installed in distribution cabinets, and the cables in the distribution cabinets are passed through the ring core to monitor and detect the cables.

[0003] However, after the existing current transformer is installed, the cable is passed through the ring-shaped iron core of the current transformer, so that the cable layout path needs to be arranged according to the installation position of the current transformer. Since it is difficult to adjust the position of the current transformer after installation, it is inconvenient to detect the cable according to the cable layout path, which can easily lead to the accuracy of the current signal captured by the transformer. In view of this, we propose an electronic current transformer. Utility Model Content

[0004] The purpose of the utility model is to propose an electronic current transformer in view of the problems existing in the background technology.

[0005] The technical solution of the utility model: an electronic current transformer, including a positioning plate, a protective shell, a ring-shaped electromagnetic core and a Rogowski coil, an auxiliary cylinder is installed on the top of the positioning plate, a telescopic component for driving the protective shell to extend and contract is installed at the bottom of the protective shell, an auxiliary component for assisting the rotation of the telescopic component is installed in the auxiliary cylinder, a limit component for limiting the position of the auxiliary component is arranged on one side wall of the auxiliary cylinder, threaded holes are symmetrically opened on the positioning plate, and positioning bolts for fixing the position of the positioning plate are symmetrically arranged in the two threaded holes.

[0006] Preferably, the annular electromagnetic core and the Rogowski coil are both arranged in a protective shell, and the Rogowski coil is wound on the outer surface of the annular electromagnetic core.

[0007] Preferably, the telescopic assembly comprises a support block, a bottom wall of the support block is connected to a screw rod, and a swivel is sleeved on the screw rod.

[0008] Preferably, a dovetail groove is provided on the outer surface wall of the screw, the rotating ring is arranged in the dovetail groove, and a slider is welded on the outer surface wall of the rotating ring.

[0009] Preferably, the auxiliary component comprises an internally threaded barrel, and a bearing and a positioning collar are sleeved on the outer surface wall of the internally threaded barrel, and the outer surface walls of the bearing and the positioning collar are connected to the inner surface wall of the auxiliary barrel.

[0010] Preferably, the limiting assembly comprises a T-shaped locking rod, a spring is connected to the bottom wall of the pulling end of the T-shaped locking rod, and a pull head is welded to the top wall of the pulling end of the T-shaped locking rod.

[0011] Preferably, a positioning groove is provided on the surface of the outer ring of the bearing, and the locking end of the pull head is located in the positioning groove.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects:

[0013] The utility model positions the protective shell, the annular electromagnetic core and the Rogowski coil by means of a positioning bolt and a positioning plate, and twists the support block to drive the screw to rotate, so that the screw can complete the length adjustment with the assistance of the internal threaded tube, and realizes driving the protective shell to extend or shorten, and with the assistance of the bearing, it is beneficial to rotate the swivel, which is convenient for adjusting the rotation angle of the protective shell to avoid affecting the subsequent installation of the cable, and at the same time, under the action of the T-shaped positioning rod, it is beneficial to lock the position of the positioning slot opened on the outer surface wall of the bearing, and due to the adjustment of the extended length and angle of the protective shell, the device can be adjusted according to the cable layout after installation, so as to avoid affecting the subsequent detection of the cable, so as to prevent the accuracy during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an isometric three-dimensional structural diagram of an electronic current transformer;

[0015] Figure 2 yes Figure 1 A schematic diagram of a front cross-sectional structure;

[0016] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure of the telescopic component.

[0017] Figure numerals: 1. Positioning plate; 2. Auxiliary cylinder; 3. Protective shell; 4. Ring-shaped electromagnetic core; 5. Rogowski coil; 6. Telescopic assembly; 61. Support block; 62. Screw; Swivel 63. Swivel; 64. Slider; 7. Auxiliary assembly; 71. Internally threaded cylinder; 72. Bearing; 73. Positioning collar; 8. Limit assembly; 81. T-shaped positioning rod; 82. Spring; 83. Pull head; 9. Positioning bolt. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Example

[0020] like Figure 1-3 As shown, an electronic current transformer proposed by the utility model includes a positioning plate 1, a protective shell 3, a ring-shaped electromagnetic core 4 and a Rogowski coil 5. The positioning plate 1 is symmetrically provided with threaded holes, and two positioning bolts 9 are symmetrically arranged on the positioning plate 1 and are located in the threaded holes corresponding to the positions. Through the cooperation of the threaded holes, the positioning plate 1 can be conveniently fixedly installed in the existing distribution cabinet; the auxiliary cylinder 2 is fixedly installed on the top wall of the positioning plate 1, the protective shell 3, the ring-shaped electromagnetic core 4 and the Rogowski coil 5 are all arranged above the auxiliary cylinder 2, and the ring-shaped electromagnetic core 4 and the Rogowski coil 5 are arranged inside the protective shell 3, and the ring-shaped electromagnetic core 4 and the Rogowski coil 5 are protected by the protective shell 3, and the Rogowski coil 5 is wound around the ring-shaped electromagnetic core 4.

[0021] Furthermore, a telescopic component 6 is installed at the bottom of the protective shell 3 for driving the protective shell 3 to extend and contract. The telescopic component 6 includes a support block 61. The top arc wall of the support block 61 is fixedly connected to the outer surface of the protective shell 3 to support the protective shell 3; the top of the screw 62 is fixedly connected to the bottom wall of the support block 61, which is convenient for subsequent height adjustment of the support block 61, so as to complete the extension or contraction length control of the protective shell 3, the annular electromagnetic core 4 and the Rogowski coil 5, and avoid affecting the installation of the cable; the swivel 63 is sleeved in the dovetail groove opened on the outer surface wall of the screw 62, and the position of the swivel 63 is limited by the dovetail groove. A plurality of sliders 64 are respectively welded on the outer surface wall of the swivel 63 to facilitate the subsequent auxiliary screw 62 movement.

[0022] Furthermore, an auxiliary assembly 7 is installed in the auxiliary cylinder 2 to facilitate the rotation of the auxiliary telescopic assembly 6. The auxiliary assembly 7 includes an internally threaded cylinder 71, a part of the cylinder body of the internally threaded cylinder 71 is arranged inside the auxiliary cylinder 2, a bearing 72 and a positioning collar 73 are both sleeved on the outer ring surface of the internally threaded cylinder 71, and are both arranged inside the auxiliary cylinder 2, the outer ring surface of the bearing 72 is connected to the inner surface wall of the auxiliary cylinder 2, and is used to assist the rotation of the internally threaded cylinder 71; a limiting rotation groove is opened on the inner surface wall of the auxiliary cylinder 2, and a part of the positioning collar 73 is arranged in the limiting rotation groove, through the limiting The rotation control groove limits the position of the positioning ring 73, which is beneficial to the rotation of the auxiliary internal threaded tube 71 in the auxiliary tube 2; a plurality of limiting grooves are provided on the inner surface wall of the internal threaded tube 71, and a plurality of sliders 64 are respectively arranged in the limiting grooves corresponding to the positions. The position of the slider 64 is limited by the limiting grooves to prevent the screw 62 from detaching from the internal threaded tube 71 during the process of adjusting the extension length of the support block 61, affecting the reset and hindering the subsequent use. At the same time, under the setting of the rotating ring 63, the slider 64 does not hinder the rotation of the screw 62 during the guiding process.

[0023] Furthermore, a limiting component 8 is provided on one side wall of the auxiliary cylinder 2 for facilitating position limitation of the auxiliary component 7. The limiting component 8 includes a T-shaped locking rod 81. A movable groove is provided on one side wall of the auxiliary cylinder 2. A spring 82 is provided in the movable groove. The top end of the spring 82 is fixedly connected to the bottom wall of the pulling end of the T-shaped locking rod 81. The bottom end of the spring 82 is fixedly connected to the wall of the movable groove. A through hole is provided on the bottom wall of the movable groove. A positioning slot is provided on the outer surface wall of the bearing 72. The positioning slot corresponds to the position of the through hole. The locking end of the T-shaped locking rod 81 passes through the through hole and is provided in the positioning slot. By cooperating with the positioning slot, the bearing 72 is locked. After the rotation of the internal threaded tube 71 is completed, its position is restricted to prevent its movement from damaging the cable, and the setting of the bearing 72 prevents the protective shell 3 from adjusting the length and causing the hollow part of the protective shell 3 to face in the direction affecting the installation of the cable; the pull head 83 is welded to the top wall of the pulling end of the T-shaped clamping rod 81, which is convenient for the staff to pull the T-shaped clamping rod 81 to move. When the pull head 83 is pulled to drive the T-shaped clamping rod 81 to move out of the positioning slot, the bearing 72 can be released to facilitate the bearing 72 to assist the rotation of the internal threaded tube 71. After the rotation adjustment is completed, the pull head 83 is released, so that the spring 82 drives the T-shaped clamping rod 81 to reset, and the bearing 72 is locked again, which is simple to operate.

[0024] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. An electronic current transformer, comprising a positioning plate (1), a protective housing (3), a ring-shaped electromagnetic core (4) and a Rogowski coil (5), Features: An auxiliary cylinder (2) is installed on the top of the positioning plate (1), a telescopic component (6) is installed at the bottom of the protective shell (3) for driving the protective shell (3) to extend and retract, an auxiliary component (7) is installed in the auxiliary cylinder (2) for assisting the rotation of the telescopic component (6), a limit component (8) is arranged on one side wall of the auxiliary cylinder (2) for limiting the position of the auxiliary component (7), threaded holes are symmetrically opened on the positioning plate (1), and positioning bolts (9) are symmetrically arranged in the two threaded holes for fixing the position of the positioning plate (1).

2. An electronic current transformer according to claim 1, It is characterized in that The annular electromagnetic core (4) and the Rogowski coil (5) are both arranged in the protective housing (3), and the Rogowski coil (5) is wound on the outer surface of the annular electromagnetic core (4).

3. An electronic current transformer according to claim 1, It is characterized in that The telescopic assembly (6) comprises a support block (61), a bottom wall of the support block (61) is connected to a screw rod (62), and a rotating ring (63) is sleeved on the screw rod (62).

4. An electronic current transformer according to claim 3, It is characterized in that A dovetail groove is provided on the outer surface wall of the screw rod (62), the rotating ring (63) is arranged in the dovetail groove, and a sliding block (64) is welded on the outer surface wall of the rotating ring (63).

5. An electronic current transformer according to claim 1, It is characterized in that The auxiliary component (7) comprises an internally threaded cylinder (71), on the outer surface wall of which a bearing (72) and a positioning collar (73) are sleeved, and the outer surface walls of the bearing (72) and the positioning collar (73) are both connected to the inner surface wall of the auxiliary cylinder (2).

6. An electronic current transformer according to claim 5, It is characterized in that The limiting assembly (8) comprises a T-shaped locking rod (81), a spring (82) is connected to the bottom wall of the pulling end of the T-shaped locking rod (81), and a pull head (83) is welded to the top wall of the pulling end of the T-shaped locking rod (81).

7. An electronic current transformer according to claim 6, It is characterized in that A positioning groove is provided on the outer ring surface of the bearing (72), and the locking end of the pull head (83) is located in the positioning groove.

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