A kind of open and close current transformer

Abstract

The invention relates to the technical field of current measurement, and discloses an open-and-closed current transformer, comprising a lower shell, wherein one side of the top of the lower shell is rotatably connected to an upper shell, a semi-circular iron core is embedded in the lower shell and the upper shell, a copper wire is wound on the iron core in the lower shell, both ends of the copper wire are fixedly connected to a docking joint, the docking joint is embedded on the outer wall of one side of the lower shell, a side of the lower shell close to the docking joint is rotatably connected to a mounting plate, both ends of the mounting plate close to the docking joint are fixedly connected to a docking rod, two limiting holes are provided on the mounting plate, two limiting seats are fixedly connected to one side of the lower shell close to the mounting plate, each limiting seat is aligned with the limiting hole on the same side thereof, a mounting groove is provided on the top and bottom of the limiting seat, and limiting blocks are slidably connected in the mounting groove. The open-and-closed current transformer can avoid the problem of the need to remove the wiring copper wire and then change the position for winding due to reverse connection of positive and negative poles, which leads to a more troublesome operation.

Description

Technical Field

[0001] The invention relates to the technical field of current measurement, in particular to a split-type current transformer. Background Art

[0002] The current transformer is an important power equipment. It uses the principle of electromagnetic induction to convert the large current on the primary side into a small current on the secondary side, so as to facilitate the use of measurement, metering and protection devices. The split current transformer is a special current transformer. The most significant feature between it and the traditional current transformer is that the magnetic circuit design allows the transformer to be installed without disconnecting the circuit being measured, which greatly improves the convenience and flexibility of installation.

[0003] When using the current transformer, the wiring ends on the ammeter need to be connected to the positive and negative poles on the current transformer according to the positive and negative poles, and then the measured wires are passed through the current transformer. At this time, when the measured current flows through the wires in the current transformer, an induced electromotive force will be generated in the secondary winding of the current transformer. The electromotive force is proportional to the measured current, thereby realizing the current measurement;

[0004] When connecting the wiring ends to the positive and negative terminals of the current transformer, the staff may easily be negligent and connect the positive and negative terminals in reverse, which will cause problems such as instrument reading deviation and electricity meter measurement error. At this time, the general operation is to remove the wiring ends from the positive and negative terminals of the current transformer, and then re-position them for connection. The wiring method of some ammeters and current transformers is to wrap the wiring copper wire around the docking head on the current transformer, which makes it more troublesome to remove the wiring ends from the docking head of the current transformer, and after removal, it is necessary to change the position and perform the winding and docking work again, which increases the tediousness after misoperation. For this reason, we propose an open and close current transformer. Summary of the invention

[0005] The object of the present invention is to provide a split current transformer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a split-type current transformer, comprising a lower shell, a top side of the lower shell is rotatably connected to an upper shell, a semi-circular iron core is embedded in the lower shell and the upper shell, a copper wire is wound on the iron core in the lower shell, both ends of the copper wire are fixedly connected to a docking joint, the docking joint is embedded on the outer wall of one side of the lower shell, a side of the lower shell close to the docking joint is rotatably connected to a mounting plate, both ends of the mounting plate close to the docking joint are fixedly connected to a docking rod, and two limit holes are provided on the mounting plate;

[0007] Two limit seats are fixedly connected to one side of the lower shell body close to the mounting plate, each of the limit seats is aligned with the limit hole on the same side, mounting grooves are provided at the top and bottom of the limit seats, and limit blocks are slidably connected in the mounting grooves, and a limit spring is fixedly connected between the limit block and the inner wall of the mounting groove on the same side.

[0008] Preferably, two slide grooves are provided at both ends of the mounting plate close to one side of the lower shell body, the limiting hole is located between two adjacent slide grooves, and a limiting frame is slidably connected between the slide grooves on both sides of each limiting hole, and the two limiting frames are staggered and distributed, and the limiting frame is fitted with the limiting seat on the same side thereof.

[0009] Preferably, one end of the docking rod away from the lower shell is sleeved with a clamping plate slidably connected thereto, and one end of the docking rod away from the lower shell is fixedly connected to a screw rod, a threaded cap is threadedly connected to the screw rod, and the threaded cap is rotatably connected to the clamping plate.

[0010] Preferably, a limiting plate is fixedly connected to one side of the lower shell, and a limiting opening is formed on a side of the limiting plate away from the lower shell.

[0011] Preferably, a fixing plate is fixedly connected to one side of the upper shell body close to the limiting plate, and a fixing plate is rotatably connected to a limiting rod on one side of the fixing plate close to the limiting plate.

[0012] Preferably, a side of the lower shell body close to the mounting plate is rotatably connected to a mounting shaft, the mounting plate is sleeved on the mounting shaft and slidably connected thereto, and a side of the mounting plate away from the lower shell body is fixedly connected to a knob, the knob is sleeved on the mounting shaft and slidably connected thereto.

[0013] Preferably, a mounting hole is provided on the fixing plate, and slots are provided on inner walls on both sides of the mounting hole.

[0014] Preferably, the top of the limit rod is fixedly connected to a limit shaft, the limit shaft is located in the mounting hole and is rotatably connected to its inner top wall, a torsion spring is fixedly connected between the limit shaft and the inner wall of the mounting hole, and telescopic rods are fixedly connected on both sides of the limit shaft, and the telescopic rods have built-in fixing springs.

[0015] Preferably, a guiding inclined surface is arranged on the top of a side of the limiting block close to the limiting hole, and a rubber pad is fixedly connected to a side of the limiting block away from the mounting groove.

[0016] Preferably, a positive and negative pole marking is provided on one side of the lower shell body close to the mounting plate, the positive and negative pole markings on the lower shell body are respectively located on both sides of the mounting plate, and a gasket is fixedly connected to the bottom of the lower shell body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention can directly exchange the positions of the docking rods at both ends of the mounting plate by rotating the mounting plate. At this time, the wiring ends connected to the docking rods can directly exchange the docking positions of the positive and negative poles with the mounting plate. After the mounting plate is rotated, the mounting plate is pushed toward the lower shell body so that the docking of the docking rods and the docking joints on the same side thereof is completed. At this time, the current of the wires between the current transformers can be measured, thereby avoiding the problem that the wiring copper wires need to be removed and then replaced for winding due to the reverse connection of the positive and negative poles, which leads to the problem that the operation is more troublesome. At the same time, when the mounting plate is rotated, it can drive the limit frame to rotate together. When the limit frame contacts the limit seat on the other side, the limit frame can be driven to slide along the slide slot with the rotation of the mounting plate. When the limit frame slides to the end of the slide slot, it can be limited. At this time, the rotation angle of the mounting plate can be limited by the cooperation of the limit frame and the limit seat, thereby avoiding that the rotation angle of the mounting plate is too large, resulting in the inability of the docking rod to smoothly dock with the docking joint, and effectively improving the auxiliary function of the device when converting the positive and negative pole joints.

[0019] When the mounting plate is pushed toward the lower housing, the limiting block is provided with a guide inclined surface on one side close to the limiting hole, and the guiding inclined surface is pressed by extrusion, so that the pushing force changes direction, the limiting block is pressed toward the inside of the mounting groove, and the limiting spring is contracted at the same time. When the limiting block is contracted into the mounting groove, the limiting seat is stuck into the limiting hole, and the limiting spring uses its rebound force to make the limiting blocks on the upper and lower sides of the limiting seat respectively press against the inner top wall and the inner bottom wall of the limiting hole. At this time, the limiting seat can be used to cooperate with the limiting hole to limit the mounting plate, so as to avoid the problem of displacement during the use of the current transformer, and further improve the auxiliary performance of stabilizing the mounting plate when detecting the current.

[0020] When the upper shell body and the lower shell body are closed, the limit rod is passed through the limit opening of the limit plate and moved to the bottom of the limit plate, and then the limit plate is rotated to drive the limit shaft to rotate together and make the telescopic rod clamped in the slot. At this time, the upper shell body can be limited by the cooperation of the limit rod and the limit plate. When the upper shell body needs to be opened, the limit rod is slightly rotated to drive the limit shaft to rotate, so that the end of the telescopic rod is moved out of the slot. At this time, the limit shaft and the limit rod are driven to rotate by themselves through the rebound force of the torsion spring, and the limit rod is rotated to a state flush with the limit opening. At this time, the upper shell body can be directly opened, avoiding the need for manual alignment of the limit rod with the limit opening when opening the upper shell body in traditional devices, which leads to the problem of more troublesome operation, and effectively improving the auxiliary performance of the device for opening and closing the current transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2It is a schematic diagram of the bottom structure of the lower shell of the present invention;

[0023] Figure 3 It is a schematic diagram of the unfolded structure of the lower shell and the upper shell of the present invention;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the lower shell of the present invention;

[0025] Figure 5 It is a schematic diagram of the outer structure of the lower shell of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention;

[0028] Figure 8 It is a schematic diagram of the cross-sectional structure of the threaded cap of the present invention;

[0029] Fig. 9 It is a schematic diagram of the cross-sectional structure of the limiting seat of the present invention;

[0030] Fig.10 It is a schematic diagram of the cross-sectional structure of the fixing plate of the present invention;

[0031] Fig.11 For the present invention Fig.10 A schematic diagram of the enlarged structure of area A is shown.

[0032] In the figure: 1. lower shell; 11. limit plate; 12. limit opening; 2. upper shell; 21. fixing plate; 211. mounting hole; 212. slot; 22. limit rod; 221. limit shaft; 222. torsion spring; 223. telescopic rod; 224. fixing spring; 3. iron core; 31. copper wire; 32. docking joint; 4. mounting plate; 401. mounting shaft; 41. knob; 42. docking rod; 43. limit hole; 44. slide groove; 45. limit frame; 5. splint; 51. screw; 52. threaded cap; 6. limit seat; 61. mounting groove; 62. limit block; 63. limit spring; 64. rubber pad. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-11The present invention provides a technical solution: a split-type current transformer, comprising a lower shell 1, a top side of the lower shell 1 is rotatably connected to an upper shell 2, and an arc-shaped groove is provided on the opposite sides of the upper shell 2 and the lower shell 1. When current detection is performed, the wires to be detected can be placed between the upper shell 2 and the lower shell 1, a limit plate 11 is fixedly connected to one side of the lower shell 1, a limit opening 12 is provided on the side of the limit plate 11 away from the lower shell 1, a fixing plate 21 is fixedly connected to one side of the upper shell 2, a side of the fixing plate 21 close to the limit plate 11 is rotatably connected to a limit rod 22, a mounting hole 211 is provided on the fixing plate 21, and slots 212 are provided on the inner walls on both sides of the mounting hole 211, and the limit rod 2 2 is fixedly connected with a limit shaft 221 at the top, the limit shaft 221 is located in the mounting hole 211 and is rotatably connected with the inner top wall thereof, a torsion spring 222 is fixedly connected between the limit shaft 221 and the inner wall of the mounting hole 211, and telescopic rods 223 are fixedly connected on both sides of the limit shaft 221, and the telescopic rods 223 are built with fixed springs 224. Through the design of the telescopic rod 223, when the telescopic rod 223 leaves the slot 212, the end of the telescopic rod 223 is always in contact with the inner wall of the mounting hole 211 through the rebound force of the fixed spring 224. At this time, the problem that the limit shaft 221 and the limit rod 22 cannot be aligned with the limit opening 12 in time due to inertia caused by excessive rotation when the limit shaft 221 and the limit rod 22 rotate can be avoided.

[0035] Furthermore, both the lower shell 1 and the upper shell 2 are shells made of insulating material. When in use, the upper shell 2 is opened, and then the wire to be tested is placed in the hole between the lower shell 1 and the upper shell 2, and then the upper shell 2 and the lower shell 1 are closed. At this time, the limit rod 22 will pass through the limit opening 12 on the limit plate 11 and move to the bottom of the limit plate 11. At this time, the limit rod 22 is manually rotated to make it horizontal below the limit opening 12. At this time, the upper shell 2 can be fixed by the cooperation of the limit rod 22 and the limit plate 11. During the rotation of the limit rod 22, it can be driven to rotate synchronously through the limit shaft 221. When the limit rod 22 rotates ninety degrees, the telescopic rod 223 will move to the slot 212. At this time, the fixing spring 224 will rebound to clamp the end of the telescopic rod 223 into the slot 212. In this way, the limit shaft 221 and the limit rod 22 are limited. During this process, the limit shaft 221 can also tighten the torsion spring 222. When the upper shell 2 needs to be opened again, the limit rod 22 is manually slightly rotated. At this time, the limit rod 22 can drive the limit shaft 221 and the telescopic rod 223 to rotate. At this time, the telescopic rod 223 will generate an extrusion force between the inner wall of the slot 212, and the telescopic rod 223 can be retracted by the extrusion force. At this time, the limiting effect generated by the cooperation between the telescopic rod 223 and the slot 212 on the limit shaft 221 disappears. At this time, the torsion spring 222 starts to rebound, driving the limit shaft 221 to rotate towards the original position until the limit rod 22 rotates to the state aligned with the limit opening 12. At this time, by lifting the upper shell 2, the limit rod 22 can directly pass through the limit opening 12 of the limit plate 11, thereby opening the upper shell 2.

[0036] Combined with Figure 3 , Figure 4 and Figure 7As shown, a semi-annular iron core 3 is embedded in the lower shell 1 and the upper shell 2. When the lower shell 1 and the upper shell 2 are in a closed state, the two ends of the iron core 3 located in the lower shell 1 and the upper shell 2 will fit with the two ends of the other iron core 3. At this time, the two iron cores 3 will be in a circular ring structure, which is convenient for subsequent current detection. A copper wire 31 is wound around the iron core 3 located in the lower shell 1, and both ends of the copper wire 31 are fixedly connected to a docking joint 32. The docking joint 32 is embedded in the outer wall of one side of the lower shell 1, and a mounting plate 4 is rotatably connected to one side of the lower shell 1 close to the docking joint 32. The two ends of the mounting plate 4 are fixedly connected to one side of the docking joint 32 with a docking rod 42. The body 1 is rotatably connected to a mounting shaft 401 on one side close to the mounting plate 4, the mounting plate 4 is sleeved on the mounting shaft 401 and slidably connected thereto, the mounting plate 4 is fixedly connected to a knob 41 on one side away from the lower shell 1, the knob 41 is sleeved on the mounting shaft 401 and slidably connected thereto, a positive and negative pole mark is provided on one side of the lower shell 1 close to the mounting plate 4, the positive and negative pole marks can better assist the staff in wiring work, the positive and negative pole marks on the lower shell 1 are respectively located on both sides of the mounting plate 4, a gasket is fixedly connected to the bottom of the lower shell 1, openings are provided on both sides of the gasket, external bolts can be cooperated with the openings to complete the installation and fixing of the lower shell 1.

[0037] Furthermore, when detecting the current, the two positive and negative wiring ends on the ammeter are wound around the docking rod 42 on the side of the mounting plate 4 away from the lower shell 1 according to the positive and negative pole markings, and then the mounting plate 4 is pushed by the knob 41 to move the mounting plate 4 toward the lower shell 1, and the docking rod 42 is docked with the docking joints 32 on the same side thereof. At this time, when the current passes between the lower shell 1 and the upper shell 2, the current can be introduced into the ammeter through the cooperation of the iron core 3 and the copper wire 31. At this time, the current can be detected by the pointer on the ammeter. When the operator accidentally connects the positive and negative poles of the wiring ends in reverse, the operator can pull the knob 41 outward to separate the docking rod 42 from the docking joint 32, and then drive the mounting plate 4 to rotate by the knob 41, and convert the positive and negative poles of the two docking rods 42 through the mounting plate 4, and at the same time drive the wiring ends to be exchanged, and then the docking rod 42 is docked with the docking joint 32 again, and the current detection work can continue normally.

[0038] Combined with Figure 3 , Figure 7 and Figure 8 As shown, one end of the docking rod 42 away from the lower shell 1 is sleeved with a clamping plate 5 slidably connected thereto, and one end of the docking rod 42 away from the lower shell 1 is fixedly connected to a screw rod 51, and a threaded cap 52 is threadedly connected to the screw rod 51, and the threaded cap 52 is rotationally connected to the clamping plate 5.

[0039] Furthermore, after the wiring ends of the ammeter are wound around the docking rod 42, the threaded cap 52 is rotated to move it along the screw rod 51 toward the docking rod 42. During this process, the threaded cap 52 can push the clamping plate 5 to move toward the mounting plate 4. At this time, the clamping plate 5 and the mounting plate 4 can cooperate to clamp and fix the wiring ends wound around the docking rod 42, so that the connection between the wiring ends and the docking rod 42 is tighter, thereby improving the accuracy of subsequent current detection results. When it is necessary to separate the wiring ends from the docking rod 42, the threaded cap 52 is rotated in the opposite direction to separate the clamping plate 5 from the mounting plate 4. At this time, the clamping effect of the clamping plate 5 and the mounting plate 4 on the wiring ends disappears, and the wiring ends can be directly separated from the docking rod 42.

[0040] Combined with Figure 5 , Figure 6 , Figure 7 and Fig. 9 As shown, two limiting holes 43 are provided on the mounting plate 4, and two slide grooves 44 are provided at both ends of the mounting plate 4 close to the lower shell 1. The limiting hole 43 is located between two adjacent slide grooves 44, and the slide grooves 44 on both sides of each limiting hole 43 are slidably connected to the limiting frames 45, and the two limiting frames 45 are staggered. Two limiting seats 6 are fixedly connected to the side of the lower shell 1 close to the mounting plate 4, and each limiting seat 6 is aligned with the limiting hole 43 on the same side thereof. The top and bottom of the limiting seat 6 are provided with mounting grooves 61, and the mounting grooves 61 are slidably connected to the lower shell 1. A limiting block 62 is connected, and a limiting spring 63 is fixedly connected between the limiting block 62 and the inner wall of the mounting groove 61 on the same side thereof. The limiting frame 45 fits with the limiting seat 6 on the same side thereof. A guiding slope is arranged on the top of the limiting block 62 on the side close to the limiting hole 43, and a rubber pad 64 is fixedly connected to the side of the limiting block 62 away from the mounting groove 61. The rubber pad 64 can increase the friction between the limiting block 62 and the inner wall of the limiting hole 43, thereby preventing the mounting plate 4 from sliding by itself, resulting in unstable docking between the docking rod 42 and the docking joint 32.

[0041] Furthermore, during the rotation of the mounting plate 4, the limiting frame 45 can be driven to rotate together with it. Since the two limiting frames 45 are staggered, one limiting frame 45 is located below the limiting seat 6 on the same side thereof, and the other limiting frame 45 is located above the limiting seat 6 on the same side thereof. During the rotation of the mounting plate 4, the limiting frames 45 will be separated from the limiting seat 6 on the same side thereof. When the mounting plate 4 continues to rotate, the limiting frame 45 will fit with the limiting seat 6 on the other side. The limiting seat 6 squeezes the limiting frame 45 so that the limiting frame 45 slides along the slide groove 44. When the limiting frame 45 moves to the other end of the slide groove 44, the limiting frame 45 cooperates with the limiting seat 6 to limit the mounting plate 4, ensuring that the mounting plate 4 is rotated at an angle of 180 degrees at this time, so that the docking rod 42 is more accurately aligned with the docking joint 32. After that, when the mounting plate 4 is pushed to move toward the lower shell 1, the inner wall of the limiting hole 43 can first align with the guide slope on the limiting block 62 The force direction of the limit block 62 can be changed by the guide inclined surface, so that the limit block 62 shrinks toward the installation groove 61. In this process, the limit block 62 squeezes the limit spring 63 to shrink it. When the limit seat 6 enters the limit hole 43, the limit block 62 can be attached to the inner wall of the limit hole 43 by the rebound force of the limit spring 63, and the friction between the limit block 62 and the inner wall of the limit hole 43 is increased by the rubber pad 64. At this time, the limit block 62 and the limit hole 43 are With the cooperation, the limiting work of the mounting plate 4 can be completed, so that the docking rod 42 is more stable when docking with the docking head 32. The limiting frames 45 are all I-shaped structures. After the mounting plate 4 is rotated, the two ends of the limiting frame 45 will first contact the two sides on the same side of the limiting seat 6. At this time, the limiting seat 6 and the limiting frame 45 can limit each other. The middle part of the limiting frame 45 will reserve a certain amount of activity space for the limiting block 62 due to the I-shaped structure design, ensuring that the limiting block 62 will not contact the limiting frame 45.

[0042] Working principle: First, the lower shell 1 is fixed at the specified position by means of screws and gaskets. When the current needs to be detected, the upper shell 2 is opened, and then the detected wire is placed in the hole between the lower shell 1 and the upper shell 2. Then the upper shell 2 and the lower shell 1 are closed. At this time, the limit rod 22 will pass through the limit opening 12 on the limit plate 11 and move to the bottom of the limit plate 11. At this time, the limit rod 22 is manually rotated so that it is horizontally below the limit opening 12. At this time, the upper shell 2 can be fixed by means of the limit rod 22 and the limit plate 11. During the rotation of the limit rod 22, it can be driven to rotate synchronously through the limit shaft 221. When the limit rod 22 rotates ninety degrees, the telescopic rod 223 will move to the slot 212. At this time, the fixing spring 224 will rebound and the end of the telescopic rod 223 will be stuck in the slot 212, so as to limit the limit shaft 221 and the limit rod 22.

[0043] When detecting the current, the two positive and negative terminal wire ends on the ammeter are wound around the docking rod 42 on the side of the mounting plate 4 away from the lower shell 1 according to the positive and negative pole markings. Then, after the terminal wire ends of the ammeter are wound around the docking rod 42, the threaded cap 52 is rotated to make it move along the screw rod 51 toward the docking rod 42. In this process, the threaded cap 52 can push the clamping plate 5 to move toward the mounting plate 4. At this time, the clamping plate 5 can cooperate with the mounting plate 4 to clamp and fix the terminal wire ends wound on the docking rod 42, so that the connection between the terminal wire ends and the docking rod 42 is tighter. Then, the mounting plate 4 is pushed by the knob 41 to move the mounting plate 4 toward the lower shell 1, and the docking rod 42 is docked with the docking connector 32 on the same side thereof. At this time, when the current passes between the lower shell 1 and the upper shell 2, the current can be introduced into the ammeter through the cooperation of the iron core 3 and the copper wire 31. At this time, the current can be detected through the pointer on the ammeter;

[0044] When the operator accidentally connects the positive and negative poles of the wiring ends in reverse, the operator can pull the knob 41 outward to separate the docking rod 42 from the docking head 32, and then drive the mounting plate 4 to rotate through the knob 41, and switch the positive and negative poles of the two docking rods 42 through the mounting plate 4, and drive the wiring ends to be replaced at the same time. During the rotation of the mounting plate 4, it can drive the limit frame 45 to rotate together, and because the two limit frames 45 are staggered, one of the limit frames 45 is located at the limit frame on the same side as it. The limiting frame 45 is located below the limiting seat 6, and the other limiting frame 45 is located above the limiting seat 6 on the same side thereof. During the rotation of the mounting plate 4, the limiting frame 45 will be separated from the limiting seat 6 on the same side thereof. When the mounting plate 4 continues to rotate, the limiting frame 45 will fit with the limiting seat 6 on the other side. During the rotation of the mounting plate 4, the limiting frame 45 is squeezed by the limiting seat 6 to make the limiting frame 45 slide along the slide groove 44. When the limiting frame 45 moves to the other end of the slide groove 44, the limiting frame 45 is 5 cooperates with the limiting seat 6 to limit the mounting plate 4, ensuring that the mounting plate 4 is rotated at an angle of 180 degrees at this time, so that the docking rod 42 is more accurately aligned with the docking joint 32. After that, when the mounting plate 4 is pushed to move toward the lower shell 1, the inner wall of the limiting hole 43 can first contact the guiding inclined surface on the limiting block 62, and the force direction of the limiting block 62 can be changed through the guiding inclined surface, so that the limiting block 62 is contracted toward the mounting groove 61. In this process, the limiting block 62 will The limit spring 63 is squeezed to shrink. When the limit seat 6 enters the limit hole 43, the limit block 62 can be attached to the inner wall of the limit hole 43 through the rebound force of the limit spring 63, and the friction between the limit block 62 and the inner wall of the limit hole 43 is increased by the rubber pad 64. At this time, the limit block 62 cooperates with the limit hole 43 to complete the limiting work of the mounting plate 4. At this time, it can be ensured that the docking rod 42 and the docking joint 32 are well docked, and the current detection work can continue normally.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A split-type current transformer, comprising a lower housing (1), wherein one side of the top of the lower housing (1) is rotatably connected to an upper housing (2), wherein a semi-annular iron core (3) is embedded in both the lower housing (1) and the upper housing (2), wherein a copper wire (31) is wound around the iron core (3) in the lower housing (1), wherein both ends of the copper wire (31) are fixedly connected to a butt joint (32), wherein the butt joint (32) is embedded in an outer wall of one side of the lower housing (1), and wherein: A mounting plate (4) is rotatably connected to a side of the lower shell (1) close to the docking joint (32); a mounting shaft (401) is rotatably connected to a side of the lower shell (1) close to the mounting plate (4); the mounting plate (4) is sleeved on the mounting shaft (401) and is slidably connected thereto; a knob (41) is fixedly connected to a side of the mounting plate (4) away from the lower shell (1); the knob (41) is sleeved on the mounting shaft (401) and is slidably connected thereto; a docking rod (42) is fixedly connected to a side of both ends of the mounting plate (4) close to the docking joint (32); two limiting holes (43) are provided on the mounting plate (4); the mounting plate (4) close to the lower shell (1) Two slide grooves (44) are provided at both ends of one side, the limiting hole (43) is located between two adjacent slide grooves (44), and the slide grooves (44) on both sides of each limiting hole (43) are slidably connected to a limiting frame (45), the two limiting frames (45) are staggered, and the limiting frames (45) are fitted with the limiting seats (6) on the same side thereof, and the end of the docking rod (42) away from the lower shell (1) is sleeved with a slidably connected clamping plate (5), and the end of the docking rod (42) away from the lower shell (1) is fixedly connected with a screw rod (51), and a threaded cap (52) is threadedly connected to the screw rod (51), and the threaded cap (52) is rotatably connected to the clamping plate (5); Two limit seats (6) are fixedly connected to a side of the lower shell (1) close to the mounting plate (4), each of the limit seats (6) is aligned with the limit hole (43) on the same side thereof, a mounting groove (61) is provided at the top and bottom of the limit seat (6), a limit block (62) is slidably connected in each of the mounting grooves (61), a guide inclined surface is provided at the top of a side of the limit block (62) close to the limit hole (43), a limit spring (63) is fixedly connected between the limit block (62) and the inner wall of the mounting groove (61) on the same side thereof, and a rubber pad (64) is fixedly connected to a side of the limit block (62) away from the mounting groove (61).

2. A split current transformer according to claim 1, characterized in that: One side of the lower shell (1) is fixedly connected to a limit plate (11), and a limit opening (12) is provided on a side of the limit plate (11) away from the lower shell (1).

3. A split current transformer according to claim 2, characterized in that: A fixing plate (21) is fixedly connected to one side of the upper shell (2) close to the limiting plate (11), and a fixing plate (21) is rotatably connected to a limiting rod (22) on one side of the fixing plate (21) close to the limiting plate (11).

4. A split current transformer according to claim 3, characterized in that: The fixing plate (21) is provided with a mounting hole (211), and inner walls on both sides of the mounting hole (211) are provided with clamping grooves (212).

5. A split current transformer according to claim 3, characterized in that: The top of the limiting rod (22) is fixedly connected to a limiting shaft (221); the limiting shaft (221) is located in the mounting hole (211) and is rotatably connected to the inner top wall thereof; a torsion spring (222) is fixedly connected between the limiting shaft (221) and the inner wall of the mounting hole (211); telescopic rods (223) are fixedly connected to both sides of the limiting shaft (221); and a fixing spring (224) is built into the telescopic rod (223).

6. A split current transformer according to claim 1, characterized in that: A positive and negative pole marking is provided on one side of the lower shell (1) close to the mounting plate (4); the positive and negative pole markings on the lower shell (1) are respectively located on both sides of the mounting plate (4); and a gasket is fixedly connected to the bottom of the lower shell (1).

Images