High-precision metering type current transformer
By designing fixed components and water-absorbing strips in the current transformer, the problem that the current transformer is not easy to be waterproof is solved, effective protection of the wires and connections is achieved, and the waterproof performance and reliability of the equipment are improved.
Patent Information
- Application Number
- CN202411713618.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-03-04
AI Technical Summary
Existing current transformers are not easy to waterproof and are prone to short circuits due to water splashing, which affects use.
A high-precision metering current transformer is designed, and the fixed cover is installed on the housing using fixed components. Through structures such as water-absorbing strips and elastic strips, the wires and connections are protected to prevent moisture from entering.
Effectively prevent moisture from entering the current transformer, reduce the situation where the wire is damaged due to touching water, and improve the waterproof performance and reliability of the equipment.
Smart Images
Figure CN119560287A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of current transformers, and in particular to a high-precision metering current transformer. Background Art
[0002] A current transformer is a device that works based on the principle of electromagnetic induction. It is mainly used to convert large current on the primary side into small current on the secondary side for measurement and protection. Current transformer is an important device for electric energy metering in power systems. It can convert high-voltage, high-current electricity into low-voltage, low-current electricity for accurate metering. Current transformers usually use fluxgate technology to achieve high-precision measurement to meet the accurate metering requirements of electricity meters.
[0003] In the related art, the current transformer includes a shell, a mounting groove is provided on the shell, a mounting bolt is provided on the mounting groove, the mounting bolt is threadedly connected in the mounting groove, and the mounting bolt can install the wire on the shell to connect the wire and the electrical components in the current transformer.
[0004] During the use of the current transformer, if the staff accidentally spills water on the current transformer, the water may flow into the wires and the installation groove, affecting the use of the current transformer and may even cause a short circuit in the current transformer. Summary of the invention
[0005] In order to improve the problem that the current transformer is not easily waterproof, the present application provides a high-precision metering current transformer.
[0006] The present application provides a high-precision metering current transformer, which adopts the following technical solution: A high-precision metering current transformer comprises a shell, a mounting groove is provided on the shell, a mounting bolt for fixing a wire is provided on the mounting groove, a fixing cover is provided on the shell, a placement groove is provided on the fixing cover, a through hole is provided on the fixing cover for the wire to pass through, the placement groove is for the wire and the mounting bolt to be placed, and a fixing assembly is provided on the shell, and the fixing assembly is used to limit the movement of the fixing cover.
[0007] By adopting the above technical solution, the fixing cover is installed on the shell through the fixing assembly, the placement groove protects the wire and the mounting bolt, and the wire passes through the through hole, so that the fixing cover can stably protect it. If water is spilled on the shell, the fixing cover can protect the connection between the wire and the shell, reducing the damage of the wire due to water.
[0008] Optionally, a first connecting piece is provided on the fixing cover, and a second connecting piece is provided on the shell, and a plurality of water-absorbing strips are provided on the first connecting piece and the second connecting piece; when the fixing cover is installed on the shell, a gap between the first connecting piece and the second connecting piece is provided for the wire to pass through.
[0009] By adopting the above technical solution, when the fixing cover is installed on the shell, the wire is allowed to pass between the first connecting piece and the second connecting piece, and a plurality of water-absorbing strips are provided on the first connecting piece and the second connecting piece, so that the water-absorbing strips can abut against the outer surface of the wire, so that the water on the wire can be absorbed by the water-absorbing strips, making it difficult for water to enter the fixing cover along the wire, thereby further reducing the influence of moisture on the connection between the wire and the shell.
[0010] Optionally, an elastic strip is provided on the first connecting piece, a stop block is provided on the elastic strip, and a stop groove for inserting the stop block is provided on the second connecting piece; when the first connecting piece abuts against the second connecting piece, the stop block is inserted into the stop groove.
[0011] By adopting the above technical solution, the staff drives the elastic strip to deform, inserts the stop block into the stop groove, and causes the stop block to limit the second connecting piece, thereby allowing the first connecting piece and the second connecting piece to be fixed to each other, reducing the possibility of separation of the first connecting piece and the second connecting piece, and allowing the wire to be stably positioned between the first connecting piece and the second connecting piece.
[0012] Optionally, the fixing assembly includes a fixing bar and a fixing block, the fixing bar has elastic deformation capability, the fixing bar is arranged on the shell, the fixing block is arranged on the fixing bar, and the fixing cover is provided with a fixing groove for inserting the fixing block; when the fixing block is inserted into the fixing groove, the fixing cover is fixed to the shell.
[0013] By adopting the above technical solution, the fixing bar has elastic deformation ability, and the staff drives the fixing bar to deform, so that the fixing block is inserted into the fixing groove, and the fixing block limits the fixing cover, so that the fixing cover can be stably located in the shell, making it difficult for the fixing cover to move on the shell.
[0014] Optionally, a limit plate for blocking the fixed groove is slidably connected to the shell, the second connecting piece is slidably connected to the shell, the first connecting piece is slidably connected to the fixed cover, and the first connecting piece is provided with a linkage component for driving the limit plate to move; when the second connecting piece abuts against the first connecting piece, the limit plate does not block the fixed groove; when the second connecting piece does not abut against the first connecting piece, the limit plate blocks the fixed groove.
[0015] By adopting the above technical solution, the staff slides the second connecting piece so that the second connecting piece abuts the first connecting piece until the stop block is inserted into the stop groove, and the first connecting piece and the second connecting piece are fixed to each other, so that the second connecting piece can drive the first connecting piece to move, and the first connecting piece drives the limit plate to move through the linkage assembly, so that the limit plate will not block the fixing groove, so that the fixing bar can be smoothly inserted into the fixing groove; if the first connecting piece and the second connecting piece are not fixed, the limit plate can block the fixing groove. At this time, the staff cannot completely insert the fixing block into the fixing groove, so that the staff knows that the first connecting piece and the second connecting piece are not firmly fixed, so that the staff can re-fix the first connecting piece and the second connecting piece; at the same time, the limit plate blocks the fixing groove, making it difficult for debris to enter the fixing groove, thereby avoiding the fixing cover from being blocked in the fixing groove by debris during installation, affecting the insertion of the fixing block.
[0016] Optionally, the linkage assembly includes a first rack, a rotating gear and a second rack, the second rack is arranged on a limiting plate, the rotating gear is rotatably connected to the shell, the first rack is arranged on a first connecting plate, and the first rack and the second rack are both engaged with the rotating gear; when the first connecting plate is lifted, the limiting plate does not block the fixing groove.
[0017] By adopting the above technical solution, the first rack is set on the first connecting plate, and the first connecting plate can drive the first rack to move, so that the first rack drives the rotating gear to rotate, and the rotating gear drives the second rack to move. Since the second rack is set on the limiting plate, the second rack can drive the limiting plate to move, so that the limiting plate will not block the fixing groove.
[0018] Optionally, a locking strip is slidably connected to the shell, a locking block is provided on the locking strip, and a locking groove is provided on the first connecting piece; when the locking block is located in the locking groove, the first connecting piece cannot abut against the second connecting piece; when the locking block is out of the locking groove, the first connecting piece can abut against the second connecting piece.
[0019] By adopting the above technical solution, the staff slides the locking bar to allow the locking block to be inserted into the locking groove, so that the locking block limits the first connecting piece to prevent the first connecting piece from sliding, thereby allowing the first connecting piece to be locked to prevent the first connecting piece from shaking during transportation and causing damage to the first connecting piece.
[0020] Optionally, a locking bevel is provided on the locking bar, and the distance between the locking bevel and the mounting groove gradually decreases along the insertion direction of the mounting bolt, and the locking bevel is located in the insertion path of the mounting bolt; when the mounting bolt is inserted into the mounting groove, the locking block disengages from the locking groove.
[0021] By adopting the above technical solution, the staff turns the mounting bolt, and the distance between the locking bevel and the mounting groove gradually decreases along the insertion direction of the mounting bolt. The mounting bolt drives the locking bar to move through the locking bevel, so that the locking block can disengage from the locking groove, thereby allowing the locking block to automatically unlock the first connecting piece, so as to facilitate the mutual fixation of the first connecting piece and the second connecting piece.
[0022] Optionally, a locking spring is provided on the locking bar, and the locking spring drives the locking block to be inserted into the locking groove.
[0023] By adopting the above technical solution, the locking block is driven by the locking spring to be inserted into the locking groove, so that the locking block can more stably fix the first connecting piece, thereby allowing the first connecting piece to be more stably fixed to the shell.
[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. Install the fixing cover on the shell through the fixing assembly, let the placement groove protect the wire and the mounting bolts, and the wire passes through the through hole, so that the fixing cover can stably protect it. If water is spilled on the shell, the fixing cover can protect the connection between the wire and the shell, reducing the damage of the wire due to water.
[0025] 2. The staff drives the elastic strip to deform, inserts the stop block into the stop groove, and limits the second connecting piece, so that the first connecting piece and the second connecting piece can be fixed to each other, reducing the possibility of separation of the first connecting piece and the second connecting piece, so that the wire can be stably positioned between the first connecting piece and the second connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is along Figure 1 Partial cross-sectional view along line AA; Figure 3 is a structural schematic diagram highlighting the first connecting piece in an embodiment of the present application; Figure 4 yes Figure 1 A magnified schematic diagram of part B; Figure 5 is an exploded schematic diagram highlighting the retaining groove in an embodiment of the present application; Figure 6 It is an exploded schematic diagram highlighting the fixing groove in the embodiment of the present application.
[0027] 1. Housing; 11. Mounting groove; 111. Ring groove; 12. Mounting bolt; 121. Mounting ring; 13. Moving groove; 131. Locking strip; 132. Locking inclined plane; 133. Slot; 134. Locking spring; 135. Block; 136. Locking block; 14. Second connecting piece; 141. Locking groove; 142. Second connecting block; 143. Operating block; 144. Operating hole; 145. Stop groove; 2. Fixed cover; 21. Placement groove; 211. Through hole; 22. First connecting piece; 221. First connecting block; 222. Water absorption strip; 223. Elastic strip; 224. Stop block; 23. Fixed groove; 24. Limiting plate; 3. Fixed assembly; 31. Fixed strip; 32. Fixed block; 4. Linkage assembly; 41. First rack; 42. Rotating gear; 43. Second rack; 44. Accommodating groove. DETAILED DESCRIPTION
[0028] The following is combined with Figure 1-6 This application is described in further detail.
[0029] This embodiment discloses a high-precision metering current transformer, which uses fluxgate technology to achieve high-precision measurement. Its principle is based on the nonlinear magnetization characteristics of the core material. The fluxgate technology achieves high-precision current measurement by utilizing the nonlinear magnetization characteristics of the core material and closed-loop compensation technology.
[0030] Reference Figure 1 and Figure 2 A high-precision metering current transformer includes a housing 1, a plurality of mounting grooves 11 are provided on the surface of the housing 1, and mounting bolts 12 are provided on the mounting grooves 11. The mounting bolts 12 are threadedly connected to the groove wall of the mounting groove 11. When the mounting bolts 12 are threadedly connected in the mounting groove 11, the mounting bolts 12 can fix the wire on the housing 1, so that the wire and the electrical components in the housing 1 are connected.
[0031] Reference Figure 2 and Figure 3 A mounting ring 121 is sleeved on the outer surface of the mounting bolt 12, and a ring groove 111 is provided on the surface of the housing 1 for the mounting ring 121 to be inserted. A connecting hole is provided on the surface of the mounting ring 121 for the wire to pass through.
[0032] Reference Figure 2 and Figure 3The outer surface of the housing 1 is provided with a moving groove 13 connected to the annular groove 111, and a locking bar 131 is slidably connected in the moving groove 13. A locking bevel 132 is provided on the surface of the locking bar 131 facing the annular groove 111, and the distance between the locking bevel 132 and the mounting groove 11 gradually decreases in the vertical downward direction, and the locking bevel 132 is located in the insertion path of the mounting ring 121. When the mounting bolt 12 is threadedly connected in the mounting groove 11, the mounting ring 121 drives the locking bar 131 to move through the locking bevel 132.
[0033] Reference Figure 2 and Figure 3 A clamping groove 133 is provided on the groove wall of the movable groove 13, and a locking spring 134 is provided on the groove wall of the clamping groove 133. One end of the locking spring 134 is fixedly connected to the groove wall of the clamping groove 133, and the other end of the locking spring 134 is fixedly connected to a clamping block 135. The clamping block 135 is fixedly connected to the surface of the locking bar 131, and the locking spring 134 drives the locking bar 131 to be located in the movable groove 13.
[0034] Reference Figure 2 and Figure 3 A locking block 136 is fixedly connected to the surface of the locking strip 131, and two second connecting pieces 14 are slidably connected to the outer surface of the housing 1, and each second connecting piece 14 is located on a different sliding path of the locking block 136. A locking groove 141 is provided on the surface of the second connecting piece 14 for the locking block 136 to pass through, and the locking groove 141 penetrates to the side of the second connecting piece 14 away from the moving groove 13. A second connecting block 142 is integrally formed on the surface of the second connecting piece 14 away from the ground, and the surface of the second connecting block 142 away from the second connecting piece 14 is an arc surface, and the arc surface is for the wire to be placed.
[0035] Reference Figure 3 and Figure 4 An operating block 143 is fixedly connected to the surface of the second connecting piece 14 , and an operating hole 144 for the operating block 143 to slide is provided on the housing 1 , and the operating hole 144 extends in the vertical direction. The staff moves the second connecting piece 14 by sliding the operating block 143 .
[0036] Reference Figure 2 and Figure 3 When the locking block 136 is inserted into the locking groove 141, one end of the locking strip 131 does not protrude from the housing 1, and the locking spring 134 is in a stretched state. At this time, the second connecting piece 14 cannot slide on the housing 1. When the locking block 136 is not inserted into the locking groove 141, one end of the locking strip 131 protrudes from the housing 1, and the locking spring 134 is in a non-stressed state. At this time, the second connecting piece 14 can slide on the housing 1.
[0037] Reference Figure 2 and Figure 3The housing 1 is provided with a fixing cover 2, and a placement groove 21 is provided on the surface of the fixing cover 2, and the placement groove 21 is used to place the mounting bolts 12 and the wires. A through hole 211 connected to the placement groove 21 is provided on the surface of the fixing cover 2, and the through hole 211 is used for the wires to pass through. Two fixing components 3 are provided on the housing 1, and the fixing components 3 are used to install the fixing cover 2 on the housing 1.
[0038] Reference Figure 3 Two first connecting pieces 22 are slidably connected on the surface of the fixing cover 2. When the fixing cover 2 is mounted on the housing 1, the two first connecting pieces 22 are respectively located directly above the second connecting piece 14. A first connecting block 221 is integrally formed on the surface of the first connecting piece 22 facing the ground, and the surface of the first connecting block 221 away from the first connecting piece 22 is an arc surface, and the arc surface is for placing the wire.
[0039] Reference Figure 3 , multiple water absorbing strips 222 are fixedly connected on the surfaces of the first connection block 221 and the second connection block 142, and the water absorbing strips 222 can absorb moisture. Some of the water absorbing strips 222 are fixedly connected to the arc surface of the first connection block 221 facing the second connection block 142, and the other part of the water absorbing strips 222 are fixedly connected to the arc surface of the second connection block 142 facing the first connection block 221. Multiple water absorbing strips 222 are distributed in an array along the bending direction of the arc surface of the first connection block 221 or the second connection block 142. When the wire is located between the first connection block 221 and the second connection block 142, the water absorbing strips 222 can absorb moisture on the surface of the wire.
[0040] Reference Figure 3 and Figure 5 , two elastic strips 223 are fixedly connected on the surface of the first connecting piece 22 facing the housing 1, and the elastic strips 223 have elastic deformation capability. The elastic strips 223 extend in the direction of the mounting cover to the housing 1, and a stop block 224 is fixedly connected on the surface of the elastic strips 223. Two stop grooves 145 are provided on the surface of the second connecting piece 14 away from the water absorbing strip 222, and the stop grooves 145 are for the stop blocks 224 to be inserted. The second connecting piece 14 moves toward the first connecting piece 22, and the first connecting block 221 drives the elastic strip 223 to deform until the stop block 224 is inserted into the stop groove 145. At this time, the first connecting block 221 and the second connecting block 142 are fixed to each other, so that the wire can be stably located between the first connecting block 221 and the second connecting block 142.
[0041] Reference Figure 6The fixing assembly 3 includes a fixing strip 31 and a fixing block 32. The fixing strip 31 is fixedly connected to the outer surface of the housing 1, and the fixing strip 31 has elastic deformation capability. The fixing block 32 is fixedly connected to the surface of the fixing strip 31. A fixing groove 23 is provided on the surface of the fixing cover 2 for the fixing block 32 to be inserted. When the fixing block 32 is inserted into the fixing groove 23, the fixing cover 2 is fixed to the housing 1.
[0042] Reference Figure 2 Two limit plates 24 are slidably connected to the inner wall of the placement groove 21, and each limit plate 24 can block different fixing grooves 23. A linkage component 4 is provided on the first connecting piece 22, and the linkage component 4 is used to mobilize the limit plates 24 to move.
[0043] Reference Figure 2 and Figure 3 The linkage assembly 4 includes a first rack 41, a rotating gear 42 and a second rack 43. The first rack 41 is fixedly connected to the first connecting piece 22, and the second rack 43 is fixedly connected to the limiting plate 24. The fixed cover 2 is provided with a receiving groove 44, and the receiving groove 44 is provided for the first rack 41, the rotating gear 42 and the second rack 43 to move. The rotating gear 42 is rotatably connected in the receiving groove 44, and the first rack 41 and the second rack 43 are both meshedly connected to the rotating gear 42.
[0044] Reference Figure 2 and Figure 3 When the fixing cover 2 is not fixed on the shell 1, the staff uses the second connecting block 142 to abut the first connecting block 221 until the first connecting piece 22 and the second connecting piece 14 are fixed to each other. At this time, the first connecting piece 22 moves in the direction away from the shell 1, allowing the first rack 41 to drive the rotating gear 42 to rotate, and the rotating gear 42 drives the limiting plate 24 to move through the second rack 43, so that the limiting plate 24 does not block the fixing groove 23.
[0045] Reference Figure 2 and Figure 3 When the fixing cover 2 is fixed on the shell 1, the staff drives the fixing block 32 to disengage from the fixing groove 23, and the staff moves the second connecting piece 14, and the second connecting piece 14 drives the first connecting piece 22 to move toward the ground until the stop block 224 disengages from the stop groove 145. At this time, the first rack 41 drives the rotating gear 42 to rotate, and the rotating gear 42 drives the limiting plate 24 to move through the second rack 43, so that the limiting plate 24 blocks the fixing groove 23.
[0046] The implementation principle of a high-precision metering current transformer in an embodiment of the present application is as follows: the staff first threadably connects the mounting bolt 12 into the mounting groove 11, and the mounting ring 121 drives the locking bar 131 to move through the locking bevel 132, so that the locking bar 131 releases the limiting position of the locking block 136 on the first connecting piece 22, and the staff places the fixing cover 2 on the shell 1, and then the staff slides the first connecting piece 22 to allow the stop block 224 to be inserted into the stop groove 145, so that the first connecting piece 22 and the second connecting piece 14 are fixed to each other. At this time, the first connecting piece 22 drives the rotating gear 42 to move through the first rack 41, and the rotating gear 42 drives the limiting plate 24 to move through the second rack 43, so that the limiting plate 24 does not block the fixing groove 23, and at this time, the fixing bar 31 drives the fixing block 32 to be inserted into the fixing groove 23, so that the fixing cover 2 and the shell 1 are fixed to each other.
[0047] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0048] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.
Claims
1. A high-precision metering current transformer, comprising a housing (1), wherein the housing (1) is provided with a mounting groove (11), wherein the mounting groove (11) is provided with a mounting bolt (12) for fixing a conductor, wherein: The housing (1) is provided with a fixing cover (2), the fixing cover (2) is provided with a placement groove (21), the fixing cover (2) is provided with a through hole (211) for a wire to pass through, the placement groove (21) is for placing the wire and the mounting bolt (12), and the housing (1) is provided with a fixing assembly (3), the fixing assembly (3) is used to limit the movement of the fixing cover (2).
2. A high-precision metering current transformer according to claim 1, characterized in that: The fixing cover (2) is provided with a first connecting piece (22), the shell (1) is provided with a second connecting piece (14), and the first connecting piece (22) and the second connecting piece (14) are both provided with a plurality of water absorbing strips (222); when the fixing cover (2) is mounted on the shell (1), a gap between the first connecting piece (22) and the second connecting piece (14) is provided for a wire to pass through.
3. A high-precision metering current transformer according to claim 2, characterized in that: The first connecting piece (22) is provided with an elastic strip (223), the elastic strip (223) is provided with a stop block (224), and the second connecting piece (14) is provided with a stop groove (145) for the stop block (224) to be inserted; when the first connecting piece (22) abuts against the second connecting piece (14), the stop block (224) is inserted into the stop groove (145).
4. A high-precision metering current transformer according to claim 3, characterized in that: The fixing assembly (3) comprises a fixing strip (31) and a fixing block (32); the fixing strip (31) has elastic deformation capability; the fixing strip (31) is arranged on the housing (1); the fixing block (32) is arranged on the fixing strip (31); and the fixing cover (2) is provided with a fixing groove (23) for inserting the fixing block (32); when the fixing block (32) is inserted into the fixing groove (23), the fixing cover (2) is fixed on the housing (1).
5. A high-precision metering current transformer according to claim 4, characterized in that: A limiting plate (24) for blocking the fixed groove (23) is slidably connected to the shell (1), the second connecting piece (14) is slidably connected to the shell (1), the first connecting piece (22) is slidably connected to the fixed cover (2), and the first connecting piece (22) is provided with a linkage assembly (4) for driving the limiting plate (24) to move; when the second connecting piece (14) abuts against the first connecting piece (22), the limiting plate (24) does not block the fixed groove (23); when the second connecting piece (14) does not abut against the first connecting piece (22), the limiting plate (24) blocks the fixed groove (23).
6. A high-precision metering current transformer according to claim 5, characterized in that: The linkage assembly (4) comprises a first rack (41), a rotating gear (42) and a second rack (43); the second rack (43) is arranged on a limiting plate (24); the rotating gear (42) is rotatably connected to the housing (1); the first rack (41) is arranged on a first connecting piece (22); the first rack (41) and the second rack (43) are both meshed with the rotating gear (42); when the first connecting piece (22) is lifted, the limiting plate (24) does not block the fixing groove (23).
7. A high-precision metering current transformer according to claim 5, characterized in that: The housing (1) is slidably connected with a locking strip (131), the locking strip (131) is provided with a locking block (136), and the first connecting piece (22) is provided with a locking groove (141); when the locking block (136) is located in the locking groove (141), the first connecting piece (22) cannot abut against the second connecting piece (14); when the locking block (136) is separated from the locking groove (141), the first connecting piece (22) can abut against the second connecting piece (14).
8. A high-precision metering current transformer according to claim 7, characterized in that: The locking strip (131) is provided with a locking bevel (132), the distance between the locking bevel (132) and the mounting groove (11) gradually decreases along the insertion direction of the mounting bolt (12), and the locking bevel (132) is located in the insertion path of the mounting bolt (12); when the mounting bolt (12) is inserted into the mounting groove (11), the locking block (136) disengages from the locking groove (141).
9. A high-precision metering current transformer according to claim 8, characterized in that: The locking strip (131) is provided with a locking spring (134), and the locking spring (134) drives the locking block (136) to be inserted into the locking groove (141).