A multifunctional current transformer

Abstract

The present application relates to the technical field of mutual inductor, especially to a multifunctional current transformer, which comprises a first protective shell, the first protective shell is rotationally connected with a second protective shell, the first protective shell and the second protective shell are both slidably connected with a rotating shell, the opposite sides of the two rotating shells are both provided with sealing rings, the two rotating shells are used for locking the first protective shell and the second protective shell, the rotating shell is provided with a conducting piece, and the both ends of the conducting piece are fixedly connected with connecting pieces. The first protective shell and the second protective shell are matched, and the rotating shell is rotated, so that the two interface parts are quickly locked and fixed, the locking mode is simple to operate and quick to respond, and has the anti-pulling-off ability in the locked state, and then the magnetic circuit closing position is arranged on the inner side of the first protective shell and the second protective shell, so that the sealing effect of the magnetic circuit closing position is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of mutual inductors, and in particular to a multifunctional current mutual inductor. Background Art

[0002] Current transformers are commonly used devices in power systems for current measurement, metering, and protection and control. Their basic working principle is to use electromagnetic induction to convert a high primary current into a small secondary current that is easy to measure and process. This provides standardized current signals for relay protection, instrument measurement, and system monitoring, ensuring the safe and stable operation of the system.

[0003] In practical applications, open-type current transformers are widely used for the installation, modification, and maintenance of existing systems on site due to their unique structure. This type of transformer usually consists of two separable magnetic circuit parts, and can be assembled or disassembled without cutting the primary conductor during installation, thereby improving the efficiency and safety of on-site construction.

[0004] Open-type current transformers in the existing technology usually use a snap-on or plug-in structure to connect and fix the two parts of the magnetic circuit. However, this type of connection method has problems such as cumbersome operation, low connection strength, and susceptibility to loosening due to vibration in actual applications. Especially in outdoor or vibration-prone operating environments, it is easy to cause the connection parts to loosen and the magnetic circuit to crack, thereby affecting measurement accuracy and equipment reliability. Summary of the Invention

[0005] In order to solve the problems raised by the above background technology, the present invention provides a multifunctional current transformer.

[0006] The technical solution of the present invention is as follows: A multifunctional current transformer includes a first protective shell, the first protective shell is rotatably connected to the second protective shell, the first protective shell and the second protective shell are both slidably connected to a rotating shell, the two rotating shells are provided with sealing rings on the opposite sides, and the two rotating shells are jointly used to lock the first protective shell and the second protective shell, a conductive part is provided in the rotating shell, and connecting parts are fixed at both ends of the conductive part. When the two conductive parts are docked, the two adjacent connecting parts are fitted to achieve electrical connection, the first protective shell and the second protective shell are jointly provided with sliding grooves distributed symmetrically with the center, the first protective shell and the second protective shell are both slidably connected to sliding parts, the sliding parts slide along the adjacent sliding grooves, and the sliding parts are respectively passed through the corresponding rotating shells.

[0007] Preferably, the sliding groove consists of an arc groove and a transverse groove. When the first protective shell and the second protective shell are fitted together, the transverse groove is located at the fitting point of the first protective shell and the second protective shell. The middle part of the sliding part is an elastic hollow cylinder.

[0008] Preferably, the rotating shell is provided with a guide groove for the sliding member to slide, and a shielding plate fixed to the adjacent sliding member is slidably connected in the guide groove.

[0009] Preferably, the first protective shell and the second protective shell are both provided with a connecting seat and a connecting block, and the connecting block is fixedly connected to two tension springs, one of which is rotatably connected to the adjacent connecting seat, and the other is rotatably connected to the adjacent sliding member, and the elastic coefficient of the tension spring is greater than the elastic coefficient of the elastic hollow cylinder in the middle of the sliding member.

[0010] Preferably, the connecting block is rotatably connected to a guide plate located between the first protective shell and the second protective shell.

[0011] Preferably, an anti-slip coating is provided on the inner side of the guide plate.

[0012] Preferably, protective films are provided on the facing sides of two adjacent connecting members, and the protective films are used to protect the adjacent connecting members.

[0013] Preferably, the protective film is in the shape of a triangle.

[0014] Preferably, a rejection piece is fixedly connected to the first protective shell and the second protective shell, and the rejection piece is used to hook the adjacent protective films.

[0015] Preferably, the protective film is inclined toward a side adjacent to the rejecting member.

[0016] The present invention has the following advantages: the present invention discloses an improved open-type current transformer, which is configured with a rotatable rotating shell on the first protective shell and the second protective shell of the transformer body. After the first protective shell and the second protective shell are affixed, the two interface parts can be quickly locked and firmly fixed by simply rotating the rotating shell. This locking method is not only simple to operate and has a rapid response, but also has a pull-off resistance in the locked state and is not easily loosened by external force or vibration, thereby improving the safety and reliability of the transformer in on-site use. The magnetic circuit closing position is placed inside the first protective shell and the second protective shell to achieve the effect of enhancing the sealing of the magnetic circuit closing position.

[0017] After the first protective shell and the second protective shell are installed, the cable is squeezed by the guide plate so that the cable is located in the middle of the first protective shell and the second protective shell, thereby facilitating subsequent cable inspection;

[0018] In order to enhance the sealing performance of adjacent connectors when closed and ensure surface cleanliness, a protective film is pre-applied to the surface of the connector before the first protective shell and the second protective shell are closed to prevent dust or impurities from adhering. During the closing process, the protective film is automatically peeled off and removed by the removal part, thereby increasing the sealing performance of the two adjacent connectors when in contact, while keeping the surface clean, thereby improving the reliability and stability of the connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the first protective shell and the second protective shell when they are not closed;

[0021] Figure 3 This is a sectional view of the three-dimensional structure of the rotating shell of the present invention;

[0022] Figure 4 A sectional view of the three-dimensional structure of the first protective shell and the second protective shell of the present invention;

[0023] Figure 5 Schematic diagram of the three-dimensional structure of the positional relationship between the conductive member and the connector of the present invention;

[0024] Figure 6 Schematic diagram of the three-dimensional structure of the positional relationship between the sliding member and the shielding plate of the present invention;

[0025] Figure 7 Schematic diagram of the three-dimensional structure of the positional relationship between the connecting member and the protective film of the present invention;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the positional relationship between the protective film and the rejection element of the present invention.

[0027] Explanation of the accompanying drawings: 1-first protective shell, 2-second protective shell, 3-rotating shell, 4-conducting part, 5-connecting part, 6-sliding groove, 7-arc groove, 701-horizontal groove, 8-sliding part, 9-guide groove, 10-shielding plate, 11-connecting seat, 12-connecting block, 13-tension spring, 14-guide plate, 15-protective film, 16-removal part. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] In order to solve the problems of complex operation, low connection strength, and easy loosening due to vibration in the actual application of existing open-type current transformers, especially in an environment where the installation position is on the outside and there is wind influence, the present invention provides an improved open-type current transformer. By setting a rotary locking structure, the two parts of the magnetic circuit can be quickly connected through a rotating action after closing. Moreover, after the connection is completed, the magnetic circuit closing position is not located at the interface, but is placed on the inner side of the first protective shell 1 and the second protective shell 2, thereby improving the structural stability and enhancing the sealing of the magnetic circuit closing position, further ensuring the reliable operation of the equipment under complex working conditions.

[0030] Example 1

[0031] A multifunctional current transformer, please refer to Figures 1-6 , including a first protective shell 1, the first protective shell 1 is rotatably connected to the second protective shell 2, the first protective shell 1 and the second protective shell 2 are both slidably connected to the rotating shell 3, the facing sides of the two rotating shells 3 are provided with sealing rings, the two rotating shells 3 are jointly used to lock the first protective shell 1 and the second protective shell 2, a conductive part 4 is provided in the rotating shell 3, and both ends of the conductive part 4 are fixed with connecting parts 5. When the two conductive parts 4 are docked, the two adjacent connecting parts 5 are fitted to achieve electrical connection, the first protective shell 1 and the second protective shell 2 are jointly provided with sliding grooves 6 distributed symmetrically around the center, the first protective shell 1 and the second protective shell 2 are both slidably connected with sliding parts 8, the sliding parts 8 slide along the adjacent sliding grooves 6, and the sliding parts 8 are respectively penetrated into the corresponding rotating shells 3.

[0032] In the above scheme, the conductive part 4 is the existing iron core, and the connecting part 5 is high-magnetic carbon steel. When the two rotating shells 3 are fitted together, they form a complete ring. After the ring rotates, the first protective shell 1 and the second protective shell 2 are quickly locked and fixed. At the same time, the two adjacent connecting parts 5 are fitted together. When the two rotating shells 3 are rotated 90°, the four connecting parts 5 are respectively placed in the middle of the first protective shell 1 and the middle of the second protective shell 2. While achieving the fixing effect, it can also enhance the sealing between the two connecting parts 5.

[0033] The working principle is: when the current of the cable needs to be detected, first adjust the device to Figure 2 The state (the second protective shell 2 and its parts can be adjusted to the state of the ... Figure 2 Then, move the device to the cable to be tested, and then reversely rotate the second protective shell 2 and its parts to adjust it to Figure 1The cable is now located between the first protective shell 1 and the second protective shell 2, and the two adjacent connecting parts 5 are in contact with each other. The user then rotates the two sliding members 8, causing the sliding members 8 to drive the adjacent rotating shells 3 and the conductive member 4 and their attached parts to rotate synchronously counterclockwise along the first protective shell 1 and the second protective shell 2 (counterclockwise rotation when viewed from front to back, and the sliding members 8 slide along the adjacent sliding grooves 6 during the process).

[0034] After the two rotating shells 3 and the parts thereon are rotated 90°, the user no longer rotates the two sliding members 8. At this time, the connecting member 5 has been placed in the middle of the first protective shell 1 and the middle of the second protective shell 2 (the position of the connecting member 5 is the magnetic circuit closed position). Through the above process, the first protective shell 1 and the second protective shell 2 are fixed while enhancing the sealing between the two connecting members 5.

[0035] Example 2

[0036] On the basis of embodiment 1, a part for self-locking the first protective shell 1 and the second protective shell 2 is also disclosed. Please refer to Figures 1-6 The sliding groove 6 is composed of an arc groove 7 and a transverse groove 701. When the first protective shell 1 and the second protective shell 2 are fitted together, the transverse groove 701 is located at the fitting position of the first protective shell 1 and the second protective shell 2. The middle part of the sliding member 8 is an elastic hollow cylinder. The rotating shell 3 is provided with a guide groove 9 for the sliding member 8 to slide. The guide groove 9 is slidably connected with a baffle 10 fixed to the adjacent sliding member 8. The first protective shell 1 and the second protective shell 2 are both provided with a connecting seat 11 and a connecting block 12. The connecting block 12 is fixed with two tension springs 13, one of which is rotatably connected to the adjacent connecting seat 11, and the other is rotatably connected to the adjacent sliding member 8. The elastic coefficient of the tension spring 13 is greater than the elastic coefficient of the elastic hollow cylinder in the middle of the sliding member 8. The connecting block 12 is rotatably connected with a guide plate 14 located between the first protective shell 1 and the second protective shell 2. The inner side of the guide plate 14 is provided with an anti-slip coating for increasing the friction coefficient between the inner side of the guide plate 14 and the cable.

[0037] In the above scheme, the sliding piece 8 in the process of moving, the shielding plate 10 to the adjacent guide groove 9 shielding, sliding piece 8 middle elastic hollow cylinder length is greater than the thickness of the adjacent guide piece 4, for giving the sliding piece 8 middle elastic hollow cylinder deformation space, sliding piece 8 along the adjacent arc slot 7 to the side of the adjacent horizontal slot 701, sliding piece 8 pull adjacent tension spring 13, make tension spring 13 in the stretch, when the sliding piece 8 is located in the adjacent horizontal slot 701, rely on the tension of the tension spring 13 itself, make the sliding piece 8 middle elastic hollow cylinder deformation and adjacent guide piece 4 generate extrusion force, increase the two guide piece 4 and the adjacent two connecting piece 5 of the degree of fit, at the same time, the guide plate 14 with the movement of the sliding piece 8 and tension spring 13, extrusion of the cable, so that the center axis of the cable close to the center axis of the first protective shell 1 and the second protective shell 2, in order to facilitate the subsequent detection of the cable.

[0038] The working principle is: when the current of the cable needs to be detected and the first protective shell 1 and the second protective shell 2 have been fitted, the user rotates the two sliding pieces 8, so that the sliding piece 8 slides along the arc slot 7 (the sliding piece 8 slides in the process of bringing the rotating shell 3 and its attached parts to rotate counterclockwise), when the sliding piece 8 slides to the junction position of the arc slot 7 and the adjacent horizontal slot 701, the rotating shell 3 and its attached parts have been rotated 90°, at the same time, the sliding piece 8 in the process of moving stretches the tension spring 13, so that the tension spring 13 drives the adjacent guide plate 14 to move to one side of the cable through the connecting block 12 and another tension spring 13.

[0039] When the guide plate 14 is fitted with the sliding piece 8 and the cable, the cable is located in the middle of the first protective shell 1 and the second protective shell 2, so as to facilitate the subsequent detection of the cable, the sliding piece 8 slides into the horizontal slot 701 under the action of the adjacent tension spring 13, at this time the middle elastic hollow cylinder of the sliding piece 8 deforms and generates extrusion force on the adjacent guide piece 4, the middle elastic hollow cylinder of the sliding piece 8 deforms in the process of moving the shielding plate 10 to the side close to the cable, the sliding piece 8 slides along the adjacent guide groove 9 in the above process.

[0040] When the sliding piece 8 enters the adjacent horizontal slot 701 and the middle elastic hollow cylinder of the sliding piece 8 has already applied extrusion force on the adjacent guide piece 4, the sliding piece 8 is located in the horizontal slot 701 and the tension spring 13 applies tension to the sliding piece 8, so as to realize the self-locking of the two rotating shells 3.

[0041] Embodiment 3

[0042] On the basis of embodiment 2, how to increase the cleanliness of the parts of the adjacent two connecting pieces 5 when they are connected is also disclosed, so that the adjacent two connecting pieces 5 remain clean before connection, please refer to Figure 4-Figure 8, the opposite sides of the two adjacent connecting pieces 5 are provided with protective films 15, the protective films 15 are used for protecting the adjacent connecting pieces 5, the protective films 15 are in the shape of a paper clip, the first protective shell 1 and the second protective shell 2 are fixed with removing pieces 16, the removing pieces 16 are used for hooking the adjacent protective films 15, the side of the protective film 15 facing the adjacent removing piece 16 is in an inclined shape, so that the protective film 15 is in contact with the removing piece 16, and the inclined part is a hard material, and the remaining part is a soft film, and in Figure 8 , in order to show the shape of the protective film 15, the gap between the two adjacent connecting pieces 5 is large, in fact, the gap between the two adjacent connecting pieces 5 is only used to provide a pulling space for the two protective films 15.

[0043] In the above scheme, the protective film 15 is in the shape of a paper clip, which is easy to tear, and initially does not need to detect the cable, the protective film 15 is attached to the side of the connecting piece 5 away from the lead-through 4, so as to protect the surface of the connecting piece 5, when the two adjacent connecting pieces 5 need to be connected, the protective film 15 is removed by the removing piece 16 in the first protective shell 1 and the second protective shell 2, so that the first protective shell 1 and the second protective shell 2 keep the surface of the connecting piece 5 clean before closing, and are removed in time by the removing piece 16 when closing, thereby enhancing the sealing performance of the two adjacent connecting pieces 5 when closing and ensuring the cleanliness between them.

[0044] The working principle is that when the first protective shell 1 and the second protective shell 2 are attached (in the state in Figure 1 , the two adjacent protective films 15 are attached, then the user rotates the sliding piece 8, so that the sliding piece 8 drives the rotating shell 3 to rotate along the first protective shell 1 and the second protective shell 2, the two adjacent protective films 15 are hooked by the two adjacent removing pieces 16 along with the rotation of the two rotating shells 3, and the two adjacent protective films 15 are torn off from the opposite sides of the two connecting pieces 5 along with the continuous rotation of the two rotating shells 3, the effect of the above working process is that:

[0045] Before the first protective shell 1 and the second protective shell 2 are closed, the protective film 15 is attached to the surface of the adjacent connecting piece 5 to prevent dust or impurities from adhering, during the closing of the first protective shell 1 and the second protective shell 2, the protective film 15 is automatically removed by the removing piece 16, thereby increasing the sealing performance of the two adjacent connecting pieces 5 when they are in contact and ensuring the cleanliness between them, so as to improve the reliability and stability of the connection, according to the above-mentioned embodiment 2, the two sliding pieces 8 are in close proximity, thereby enhancing the attachment degree between the two adjacent connecting pieces 5.

[0046] The above merely illustrates the embodiments of the present application but should not be taken as limitation. Any equivalent replacement within the principles of the present application should be included in the protection scope of the present application. The contents not described in detail in the present application belong to the prior art known by the skilled in the art.

Claims

1. A multifunctional current transformer, characterized in that: It includes a first protective shell (1), the first protective shell (1) is rotatably connected to a second protective shell (2), a rotating shell (3) is slidably connected in both the first protective shell (1) and the second protective shell (2), sealing rings are arranged on the opposite sides of the two rotating shells (3), the two rotating shells (3) are jointly used to lock the first protective shell (1) and the second protective shell (2), a conducting member (4) is arranged in the rotating shell (3), connecting members (5) are fixedly connected to both ends of the conducting member (4), when the two conducting members (4) are butted, the adjacent two connecting members (5) are in contact to achieve electrical connection, the first protective shell (1) and the second protective shell (2) are jointly provided with symmetrically distributed sliding grooves (6) centered, the first protective shell (1) and the second protective shell (2) are both slidably connected with sliding members (8), the sliding members (8) slide along the adjacent sliding grooves (6), and the sliding members (8) respectively pass through the corresponding rotating shells (3). The sliding groove (6) consists of an arc-shaped groove (7) and a transverse groove (701). When the first protective shell (1) and the second protective shell (2) are in contact, the transverse groove (701) is located at the contact position of the first protective shell (1) and the second protective shell (2), and the middle part of the sliding member (8) is an elastic hollow cylinder. The rotating shell (3) is provided with a guiding groove (9) for the sliding member (8) to slide, and a shielding plate (10) fixedly connected to the adjacent sliding member (8) is slidably connected in the guiding groove (9). Both the first protective shell (1) and the second protective shell (2) are provided with connecting seats (11) and connecting blocks (12), two tension springs (13) are fixedly connected to the connecting blocks (12), one of the tension springs (13) is rotatably connected to the adjacent connecting seat (11), the other tension spring (13) is rotatably connected to the adjacent sliding member (8), and the elastic coefficient of the tension spring (13) is greater than the elastic coefficient of the elastic hollow cylinder in the middle of the sliding member (8).

2. A multifunctional current transformer according to claim 1, characterized in that: The connecting block (12) is rotatably connected to a guiding plate (14) located between the first protective shell (1) and the second protective shell (2).

3. A multifunctional current transformer according to claim 2, characterized in that: An anti-slip coating is provided on the inner side of the guiding plate (14).

4. The multifunctional current transformer according to claim 1, characterized in that: Protective films (15) are arranged on the opposite sides of adjacent two connecting members (5), and the protective films (15) are used to protect the adjacent connecting members (5).

5. The multifunctional current transformer according to claim 4, characterized in that: The protective film (15) is in an L shape.

6. The multifunctional current transformer according to claim 5, characterized in that: Removing members (16) are fixedly connected in both the first protective shell (1) and the second protective shell (2), and the removing members (16) are used to hook the adjacent protective films (the 7. The multifunctional current transformer according to claim 6, characterized in that: One side of the protective film (15) facing the adjacent removing member (16) is inclined.

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