A quick wiring device and a mutual inductor having the same

Abstract

The application provides a quick wiring device and a mutual inductor with the same. The device comprises an embedding part, a connecting part and two pressing plates. The embedding part is used for embedding on an electrical equipment. The two pressing plates are arranged in sequence on one side of the embedding part, and the opposite wall surfaces of the two pressing plates are provided with pressing grooves. The connecting part is arranged through the two pressing plates, and the connecting part and the embedding part are connected in a position-adjustable manner along the thickness direction of the pressing plate. The connecting part and the embedding part are connected in a position-adjustable manner along the thickness direction of the pressing plate to adjust the distance between the end part of the connecting part away from the embedding part and the embedding part, so as to place the wire in the pressing hole and press the wire by the two pressing plates.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mutual inductors, in particular to a quick wiring device and a mutual inductor with the same. BACKGROUND

[0002] In the current technical field of mutual inductors, the resin pouring type mutual inductor secondary wiring insert adopts a circular semi-closed structure. After the coil secondary wire is fixed by soldering treatment with the insert, it is put into a pouring mold for integral pouring and molding by epoxy resin. When the mutual inductor is shipped, a cross slot outer hexagonal combination bolt is preassembled at the threaded hole position of the insert and is tightened. When wiring, the cable outer rubber needs to be peeled off first, then the cross slot outer hexagonal combination bolt preassembled on the insert is loosened to a loose state, the cable is passed through the wire hole reserved in the mutual inductor body until the circular hole position reserved at the bottom of the insert, and the wire is wound into a circular ring. Finally, the bolt is tightened with a tool to compress the wire and ensure that the wire is firm and does not loosen.

[0003] In the current installation of mutual inductors, the cross slot outer cylindrical head bolt matched with the insert is a combination bolt. In order to improve work efficiency, the installation staff may use electric tools for operation. The wire is ensured to be in firm contact under the pressure of the bolt tightening. However, due to the small contact area between the bolt and the wire, the wire may loosen or break under long-term stress, which brings great risk to the operation of the power grid. SUMMARY

[0004] In view of this, the present application provides a quick wiring device and a mutual inductor with the same, aiming to solve the problem that the small contact area between the bolt on the insert in the existing mutual inductor and the wire causes the wire to loosen or break easily.

[0005] In one aspect, the present application provides a quick wiring device for connecting a wire and an electrical equipment, the quick wiring device comprising: an insert, a connecting piece, and two pressing plates; wherein the insert is used for embedding on the electrical equipment; the two pressing plates are sequentially stacked on one side of the insert, and the opposite wall surfaces of the two pressing plates are each provided with a pressing groove, so as to form a pressing hole for pressing the wire; the connecting piece is arranged between the two pressing plates, and the connecting piece and the insert are connected in a position-adjustable manner along the thickness direction of the pressing plate, so as to adjust the distance between the end portion of the connecting piece away from the insert and the insert, so as to place the wire in the pressing hole and press the wire by the two pressing plates.

[0006] Further, the quick wiring device, the connecting piece is a connecting bolt structure, the connecting bolt structure comprises: a threaded rod and a limiting plate; wherein the threaded rod is vertically arranged with the limiting plate, and the end of the threaded rod is connected with the limiting plate, the limiting plate is used for limiting the pressing plate, so that two pressing plates are pressed between the limiting plate and the electrical equipment; the embedded part is provided with a threaded hole, the threaded rod is provided between the two pressing plates, and the threaded rod is also matched with the threaded hole to adjust the distance between the limiting plate and the embedded part.

[0007] Further, the quick wiring device, the threaded hole comprises: a first threaded part, a second threaded part and an idling part; wherein the first threaded part, the second threaded part and the idling part are coaxially arranged, and the idling part is arranged between the first threaded part and the second threaded part; the middle position of the threaded rod is provided with a groove along the circumferential direction, forming a straight rod section, and the threaded rod on both sides of the straight rod section is a first threaded section and a second threaded section respectively; when the wire is in a pressed state, the first threaded section is screwed with the first threaded part, and the second threaded section is screwed with the second threaded part, so that the threaded rod is in a fixed connection state; when the wire is in a non-pressed state, the first threaded section is placed outside the embedded part, the straight rod section is arranged at the first threaded part, and the straight rod section and the first threaded part have a screwing idling space, the second threaded section is arranged at the idling part, and the second threaded section and the idling part have a screwing idling space, so that the threaded rod is in an idling state.

[0008] Further, the quick wiring device, the hole diameter of the idling part is greater than the hole diameter of the first threaded part and the second threaded part, and the outer diameter of the straight rod section is smaller than the outer diameter of the first threaded section and the second threaded section.

[0009] Further, the quick wiring device, the wall surface of the limiting plate away from the threaded rod is provided with a screwing groove for cooperating with a screwdriver to screw the connecting bolt structure.

[0010] Further, the quick wiring device, the screwing groove is a cross groove structure.

[0011] Further, the quick wiring device, the outer wall of the embedded part is provided with a clamping groove for clamping on the electrical equipment.

[0012] Further, the quick wiring device, the clamping groove is arranged along the circumferential direction of the embedded part.

[0013] Further, the quick wiring device has two connecting members arranged side by side and spaced apart along the length direction of the pressing plate.

[0014] The quick wiring device provided by the application can adjust the distance between the end of the connecting member away from the embedding member and the embedding member in the thickness direction of the pressing plate, and then place the wire in the pressing hole and press the wire by the two pressing plates, that is, the wire is directly inserted into the corresponding pressing slot of the two pressing plates, so that the wire is prevented from loosening on the mutual inductor, thereby improving the safety of the mutual inductor.

[0015] First, the limiting plate is provided with a screwing groove, which facilitates the rotation of the connecting member by a screwdriver, is more labor-saving, and is more worthy of promotion and use.

[0016] Second, the second threaded section provided on the threaded rod cooperates with the idling part of the embedding member, at this time the threaded rod and the embedding member are idling and cannot be detached, thereby playing the role of preventing the threaded rod from falling off.

[0017] On the other hand, the application provides a mutual inductor provided with the quick wiring device.

[0018] Since the quick wiring device has the above effects, the mutual inductor provided with the quick wiring device also has corresponding technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, the same reference numerals are used throughout the drawings to designate similar or equivalent parts. In the drawings:

[0020] Figure 1 The structure schematic view of the mutual inductor provided by the embodiment of the application;

[0021] Figure 2 The structure schematic view of the mutual inductor provided by the embodiment of the application; Figure 1 The enlarged view of A in FIG. 4;

[0022] Figure 3 The cross-sectional view of the quick wiring device in the mutual inductor provided by the embodiment of the application;

[0023] Figure 4 Structure diagram of the two pressing plates provided in the embodiment of the present application;

[0024] Figure 5 Structure diagram of the pressing plate provided in the embodiment of the present application;

[0025] Figure 6 Structure diagram of the embedding part provided in the embodiment of the present application;

[0026] Figure 7 Sectional view of the embedding part provided in the embodiment of the present application;

[0027] Figure 8 Structure diagram of the connecting part provided in the embodiment of the present application;

[0028] Figure 9 Sectional view of the connecting part provided in the embodiment of the present application;

[0029] Figure 10 Structure diagram of the embedding part and the connecting part when the wire is in the compressed state provided in the embodiment of the present application;

[0030] Figure 11 Structure diagram of the embedding part and the connecting part when the wire is in the non-compressed state provided in the embodiment of the present application. DETAILED DESCRIPTION

[0031] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0032] Referring to Figures 1 to 3 , a preferred structure of the mutual inductor provided in the embodiment of the present application is shown. As shown in the figure, the mutual inductor 1 is provided with a quick wiring device 2; wherein, the quick wiring device 2 is used for wiring the wire to realize the wiring between the mutual inductor 1 and the wire. In the present embodiment, the quick wiring device 2 can be two, both of which are arranged on the top wall of the mutual inductor 1, and are used for wiring two wires respectively; of course, the quick wiring device 2 can also be other quantities, which is not limited in the present embodiment.

[0033] Continuing to refer to Figures 1 to 5 , the quick wiring device 2 can include: an embedding part 21, a connecting part 22, and two pressing plates 23; wherein,

[0034] The insert 21 is used to be installed on electrical equipment and can be embedded in the electrical equipment. Specifically, the insert 21 is embedded in the electrical equipment, for example, it can be installed on the electrical equipment first, and then the corresponding components of the electrical equipment are cast, for example, by casting resin, so that the insert 21 is at least partially embedded in the electrical equipment, and it can ensure that the insert 21 is fixedly installed in the electrical equipment, preventing the insert 21 from rotating or moving during wire connection. In this embodiment, the top wall of the insert 21 protrudes from the outside of the electrical equipment, or it can be flush with the top wall of the electrical equipment, so as to connect other components, such as connectors 22, to realize the installation of connectors 22 and pressure plates 23. In this embodiment, the electrical equipment is described using a current transformer as an example. Of course, in other embodiments, other electrical equipment can also be used; wherein, the insert 21 can be electrically connected to the coil of the current transformer 1. The insert 21 can be fixed in the corresponding position of the current transformer 1 by resin casting.

[0035] Two pressure plates 23 are stacked sequentially on one side of the insert 21 (e.g., Figure 3 (As shown on the upper side), and each of the two pressure plates 23 has a clamping groove 231 on its opposing wall surface for mating to form a clamping hole for crimping the wire. Specifically, the two pressure plates 23 can be stacked sequentially on top of the insert 21, that is, stacked sequentially on the upper side of the insert 21, so that the pressure plates 23 are vertically supported by the insert 21. Figures 3 to 5 Each pressure plate 23 is provided with a clamping groove 231. Two pressure plates 23 are arranged opposite each other so that the clamping grooves 231 surround each other to form a clamping hole for crimping wires, thereby achieving wire installation and fixation. In this embodiment, the clamping groove 231 has a semi-circular structure so that two clamping grooves 231 are joined to form a circular clamping hole, allowing the wire to be crimped within the clamping hole. The clamping groove 231 extends through the pressure plate 23 along its length, allowing the wire to extend from one end to the other, increasing the contact area between the wire and the pressure plate 23, thereby improving the crimping stability of the wire. In this embodiment, as... Figure 1 As shown, the current transformer 1 is provided with a wire mounting hole 11 that mates with the clamping hole, so that the wire can pass through the wire mounting hole 11 and be crimped into the clamping hole. The clamping groove 231 can be a through hole with a diameter of 2.20 mm or a through hole of other diameters. In this embodiment, no limitation is made on it.

[0036] The connector 22 passes through the two pressure plates 23, and the connector 22 and the insert 21 are along the thickness direction of the pressure plate 23 (e.g., Figure 1 The vertical direction shown is connected in a position-adjustable manner, for adjusting the end of the connector 22 away from the insert 21 (e.g., in the vertical direction shown). Figure 1The distance between the top end of the connecting piece 22 and the embedded piece 21 is adjusted, for example, when the distance between the top end of the connecting piece 22 and the top wall of the embedded piece 21 is increased, the movable distance of the two pressing plates 23 is increased, so that the two pressing plates 23 have a gap therebetween, the part of the wire to be connected is separated from the sheath and placed in the pressing groove, through the position adjustment of the connecting piece 22, the distance between the top end of the connecting piece 22 and the top wall of the embedded piece 21 is reduced, and the two pressing plates 23 are pressed between the top end of the connecting piece 22 and the transformer 1 through the top end of the connecting piece 22, and then the wire is pressed by the two pressing plates 23, that is, the wire is locked, and the wire is fixed on the electrical equipment, that is, the transformer 1, to prevent the wire from loosening. The connecting piece 22 can be multiple, and two are taken as an example in the embodiment, which are arranged side by side and spaced apart along the length direction of the pressing plate 23, so as to further improve the stability of the two pressing plates 23 in pressing the wire, and further improve the stability of the wire connection. Figure 1 The distance between the top end of the connecting piece 22 and the embedded piece 21 is adjusted, for example, when the distance between the top end of the connecting piece 22 and the top wall of the embedded piece 21 is increased, the movable distance of the two pressing plates 23 is increased, so that the two pressing plates 23 have a gap therebetween, the part of the wire to be connected is separated from the sheath and placed in the pressing groove, through the position adjustment of the connecting piece 22, the distance between the top end of the connecting piece 22 and the top wall of the embedded piece 21 is reduced, and the two pressing plates 23 are pressed between the top end of the connecting piece 22 and the transformer 1 through the top end of the connecting piece 22, and then the wire is pressed by the two pressing plates 23, that is, the wire is locked, and the wire is fixed on the electrical equipment, that is, the transformer 1, to prevent the wire from loosening. The connecting piece 22 can be multiple, and two are taken as an example in the embodiment, which are arranged side by side and spaced apart along the length direction of the pressing plate 23, so as to further improve the stability of the two pressing plates 23 in pressing the wire, and further improve the stability of the wire connection. Figure 1

[0037] In the embodiment, the embedded piece 21, the connecting piece 22 and the two pressing plates 23 can all be conductors, serving as terminals, so as to realize the connection between the wire and the transformer. The connecting piece is a copper connecting piece, and can also be of other conductor materials, which are not limited in the embodiment.

[0038] Referring back to Figures 4 to 5 The pressing plate 23 is further provided with a through connecting hole 232, and the connecting piece 22 is arranged in the pressing plate 23 through the through connecting hole 232. Specifically, in the embodiment, the number of the through connecting holes 232 on the pressing plate 23 is two, which is matched with the number of the connecting pieces 22.

[0039] Referring back to Figures 6 to 9 The connecting piece 22 is a connecting bolt structure, which comprises a threaded rod 221 and a limiting plate 222. The threaded rod 221 and the limiting plate 222 are arranged vertically, and the end of the threaded rod 221 (such as Figure 8 ​The top end) is connected with the limiting plate 222, the limiting plate 222 is used for limiting the pressing plate 23, so that the two pressing plates 23 are pressed between the limiting plate 222 and the electrical equipment; The threaded hole 211 is provided on the embedded part 21, the threaded rod 221 is provided on the two pressing plates 23, and the threaded rod 221 is further matched with the threaded hole 211, so as to adjust the distance between the limiting plate 222 and the embedded part 21. Specifically, the limiting plate 222 is used as the head of the connecting bolt structure, and can be limited and powered to make the threaded rod 221 rotate with the limiting plate 222. The outer wall of the threaded rod 221 is provided with external threads, which are matched with the internal threads provided on the inner wall of the threaded hole 211, so as to adjust the position of the threaded rod 221 along the axis of the threaded hole 211 by screwing the limiting plate 222, and then convert the rotating force of the screwed limiting plate 222 into a transverse force, so that the limiting plate 222 is pressed tightly on the two pressing plates 23, and then locked, the wire is fixed on the electrical equipment, that is, the transformer 1, to prevent the wire from loosening; At the same time, it is convenient to disassemble and assemble, so that the two pressing plates 23 are pressed tightly on the wire. The limiting plate 222 can be a circular plate structure, the threaded rod 221 is coaxially arranged with the limiting plate 222, forming a T-shaped structure. In order to facilitate the rotation of the threaded rod 221, the opening end (such as Figure 9 The top end) is provided with a chamfer 2114, the side length of which is 0.5mm, and the angle can be 30°, the chamfer 2114 facilitates the rotation of the threaded rod 221 into the matched threaded hole 211, prevents the threaded rod 221 from being stuck on the threaded hole 211, and further improves the installation efficiency.

[0040] Referring to Figure 8 , the wall (such as Figure 8 The top wall) of the limiting plate 222 away from the threaded rod 221 is provided with a screw groove 2221 for matching the screwdriver to screw the connecting bolt structure. Specifically, the screw groove 2221 facilitates the locking of the screwdriver, and the disassembly and assembly of the wire is more labor-saving, and the limiting plate 222 can be locked by the wrench, the disassembly and assembly of the wire is more labor-saving, the locking force is larger, it is not easy to loosen, and the safety of the transformer is prolonged.

[0041] Referring to Figure 7The threaded hole 211 comprises a first threaded part 2111, a second threaded part 2112 and an idling part 2113; the first threaded part 2111, the second threaded part 2112 and the idling part 2113 are coaxially arranged, and the idling part 2113 is arranged between the first threaded part 2111 and the second threaded part 2112. Specifically, the first threaded part 2111 and the second threaded part 2112 are both threaded hole structures, and the inner walls thereof are provided with internal threads with the same parameters, for example, both can be M6 threads, which can be manufactured at a lower cost, thereby reducing the cost of using the device; the idling part 2113 is arranged between the first threaded part 2111 and the second threaded part 2112, and the hole diameter of the idling part 2113 is greater than the hole diameters of the first threaded part 2111 and the second threaded part 2112.

[0042] Continuing to refer to Figure 8 and Figure 9 , the middle position of the threaded rod 221 is provided with a groove along the entire circumference thereof, forming a straight rod section 2211, and the threaded rods on both sides of the straight rod section 2211 are a first threaded section 2212 and a second threaded section 2213. Specifically, the outer walls of the first threaded section 2212 and the second threaded section 2213 are both provided with external threads with the same parameters, which can be M6 threads, which are matched with the internal threads of the inner walls of the first threaded part 2111 and the second threaded part 2112, so that the first threaded section 2212 and the second threaded section 2213 can be threadedly connected with the first threaded part 2111 and the second threaded part 2112, so that the second threaded section 2213 is threadedly connected with the first threaded part 2111, and the threaded rod 221 is moved in the direction of embedding into the embedding part 2 (such as the lower direction shown in Figure 3 ), until the second threaded section 2213 is rotated to the idling part 2113, the second threaded section 2213 is rotated into the second threaded part 2112 by the downward force, the first threaded section 2212 is rotated into the first threaded section 2212, and the two-part threaded connection can further ensure the stability of the threaded connection, and the continuous downward rotation causes the limiting plate 222 to gradually press the two pressing plates 23. The hole diameter of the straight rod section 2211 is smaller than the hole diameters of the first threaded part 2111 and the second threaded part 2112, so that the straight rod section 2211 can rotate in the first threaded part 2111 to achieve idling; at the same time, since the hole diameter of the idling part 2113 is greater than the hole diameters of the first threaded part 2111 and the second threaded part 2112, that is, the hole diameter of the idling part 2113 is greater than the hole diameters of the first threaded part 2111 and the second threaded part 2112, so that the second threaded part 2112 can idle at the idling part 2113.

[0043] When the wires are in the pressed state, as Figure 3 and Figure 10As shown, the first threaded segment 2212 is screwed with the first threaded part 2111, and the second threaded segment 2213 is screwed with the second threaded part 2112, so that the threaded rod 221 is in a fixed connection state, which can ensure the stability of the wire compression.

[0044] When the wire is in a non-compressed state, as shown in Figure 11 the first threaded segment 2212 is arranged outside the embedded part 2, the straight rod segment 2211 is arranged at the first threaded part 2111, and the straight rod segment 2211 has a screw idle space with the first threaded part 2111, the second threaded segment 2213 is arranged at the idle part 2112, and the second threaded segment 2213 has a screw idle space with the idle part 2112, so that the threaded rod 221 is in an idle state, and the first threaded part 2111 can limit the second threaded segment 2213 to avoid the threaded rod 221 from falling off.

[0045] Therefore, when the threaded rod 221 is screwed into the embedded part 21, the second threaded segment 2213 cooperates with the first threaded part 2111 to make the threaded rod 221 screwed into the embedded part 21, and continuously screwing the threaded rod 221 makes the second threaded segment 2213 located in the idle part 2112, at which time the threaded rod 221 and the embedded part 21 are in an idle state and cannot be detached; continuing to screw down makes the second threaded segment 2213 screwed into the second threaded part 2112, and the first threaded segment 2212 screwed into the first threaded segment 2212, and the two threaded connections are connected until the limiting plate 222 gradually compresses the two compression plates 23; conversely, unscrewing the threaded rod 221 can also achieve the idle phenomenon of the threaded rod 221 and the embedded part 21, and the first threaded part 2111 can limit the second threaded part 2112, so that the second threaded segment 2213 is limited at the idle part 2112, solving the problem of existing bolts falling into other equipment or copper bars in the cabinet, which is prone to short circuit and has a safety hazard. Of course, under the action of the upward force, the second threaded segment 2213 can also be screwed upward into the first threaded part 2111, and the threaded rod 221 and the embedded part 21 are detached by screwing, but an additional force is needed, and only the screwing force can make the threaded rod 221 idle and cannot be detached.

[0046] Continuing to refer to Figure 6 and Figure 7 , the outer wall of the embedded part 21 is provided with a clamping groove 212 for clamping on the electrical equipment. Specifically, the clamping groove 212 is arranged along the circumferential direction of the embedded part 21 to form an annular groove structure, so that a protrusion is formed at the clamping groove 212 when the resin is poured in the mutual inductor 1, the protrusion cooperates with the clamping groove 212 to achieve further clamping of the embedded part 21.

[0047] In summary, the quick wiring device and the mutual inductor with the same provided by the embodiment can adjust the distance between the end of the connecting piece 22 away from the embedding piece 21 and the embedding piece 21 in the thickness direction of the pressing plate 23, and then place the wire in the pressing hole and press the wire by the two pressing plates 23, that is, the wire is directly inserted into the corresponding pressing groove of the two pressing plates, so that the wire is prevented from loosening on the mutual inductor, and the safety of the mutual inductor is improved. The wire can be avoided to be wound into a ring shape, that is, the wire can be bent into a ring without great force, the difficulty of installing the wire is further reduced, the installation steps are reduced, and the labor is saved, the installation efficiency is improved, and the wire is prevented from being extruded by the bolt during the tightening process to cause the wire to loosen or break, and the service life of the wire is prolonged. In addition, the quick wiring device and the mutual inductor with the same have the following advantages:

[0048] First, the limiting plate is provided with a screw groove, which facilitates the rotation of the connecting piece by a screwdriver, is more labor-saving, and is more worthy of promotion and use.

[0049] Second, the second threaded section 2213 provided on the threaded rod 221 cooperates with the idling part 2111 on the embedding piece 21, at this time, the threaded rod 221 and the embedding piece 21 realize idling and cannot be detached, and thus the threaded rod 221 plays a role of preventing falling off.

[0050] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, it should be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting" and "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A quick-connection device, characterized in that, The quick-connect device, used for connecting wires and electrical equipment, includes: an insert, a connector, and two pressure plates; wherein... The insert is used to be disposed on the electrical equipment; the insert is at least partially embedded in the electrical equipment, and the top wall of the insert protrudes from the outside of the electrical equipment; The two pressure plates are stacked on one side of the insert, and each of the two pressure plates has a pressing groove on its opposite wall surface for mating to form a pressing hole for crimping the wire. The connector passes through the two pressure plates, and the connector and the insert are connected along the thickness direction of the pressure plates in a position-adjustable manner to adjust the distance between the end of the connector away from the insert and the insert, so as to place the wire in the clamping hole and clamp the wire by the two pressure plates; The connecting bolt structure includes: a threaded rod and a limiting plate; wherein, The threaded rod is perpendicular to the limiting plate, and the end of the threaded rod is connected to the limiting plate. The limiting plate is used to limit the pressure plate, so that the two pressure plates are pressed between the limiting plate and the electrical equipment. The insert has a threaded hole, the threaded rod passes through the two pressure plates, and the threaded rod also cooperates with the threaded hole to adjust the distance between the limiting plate and the insert; The threaded hole includes: a first threaded portion, a second threaded portion, and a free-rotating portion; wherein... The first threaded portion, the second threaded portion, and the idler portion are coaxially arranged, and the idler portion is disposed between the first threaded portion and the second threaded portion; The threaded rod has a groove along its circumference at the middle position to form a straight rod segment, and the threaded rods on both sides of the straight rod segment are the first threaded segment and the second threaded segment, respectively. When the wire is in a compressed state, the first threaded segment is screwed into the first threaded portion, and the second threaded segment is screwed into the second threaded portion, so that the threaded rod is in a fixed connection state; When the wire is in a non-compressed state, the first threaded section is placed outside the insert, the straight rod section is disposed at the first threaded portion, and there is a turning free space between the straight rod section and the first threaded portion. The second threaded section is disposed at the free-spinning portion, and there is a turning free-spinning free space between the second threaded section and the free-spinning portion, so that the threaded rod is in a free-spinning state.

2. The quick-connection device according to claim 1, characterized in that, The bore diameter of the idling part is larger than the bore diameters of the first threaded part and the second threaded part, and the outer diameter of the straight rod section is smaller than the outer diameters of the first threaded section and the second threaded section.

3. The quick-connect device according to claim 1, characterized in that, The limiting plate has a screw-tightening groove on its wall surface facing away from the threaded rod, which is used to engage a screwdriver to tighten the connecting bolt structure.

4. The quick-connection device according to claim 3, characterized in that, The screw groove has a cross-shaped groove structure.

5. The quick-connect device according to any one of claims 1 to 4, characterized in that, The outer wall of the insert is provided with a locking groove for locking onto the electrical equipment.

6. The quick-connection device according to claim 5, characterized in that, The retaining groove is arranged around the circumference of the insert.

7. The quick-connect device according to any one of claims 1 to 4, characterized in that, There are two connectors, which are arranged side by side and spaced apart along the length of the pressure plate.

8. A current transformer, characterized in that, It is equipped with a quick-connection device as described in any one of claims 1 to 7.

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