Portable loop closing detection device

Abstract

The invention discloses a portable loop closing detection device, and relates to the technical field of current transformers, the portable loop closing detection device comprises an operating rod and a current transformer, a lantern ring of the current transformer comprises a first connecting unit, two parallel second connecting units and a third connecting unit which are parallel to each other, each of the first connecting unit, the third connecting unit and the two second connecting units comprises a shell, an iron core arranged in the shell and a winding coil wound on the iron core; the first connecting unit is fixedly connected to one end of the operating rod, on one hand, a worker can control the positions of the operating rod and the two second connecting units, so that all parallel electric wires can respectively and sequentially penetrate through a closed structure formed by the current transformer, and then measurement work of the worker is facilitated; and on the other hand, the worker controls the current transformer by controlling the operation rod and other structures, and the worker is far away from the wire, so that the risk of the worker in wire current detection work can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of current transformers, in particular to a portable loop closing detection device. Background Art

[0002] The purpose of loop closing detection is to ensure the safety and reliability of loop closing operation and avoid damage to power equipment and systems caused by circulating current, overvoltage and other problems. Before loop closing operation, it is necessary to detect the current of the wires in the voltage box. Through detection, it is possible to know in real time whether there is abnormal circulating current in these wires, so as to discover potential problems in time and avoid overheating of wires and damage to equipment due to excessive circulating current.

[0003] The patent with announcement number CN220509839U discloses a plug-in current transformer, which includes a plug-in mechanism, a fixing mechanism is arranged on the outside of the plug-in mechanism, and the plug-in mechanism includes a lower shell, a limit groove is opened on the top of the lower shell, a power-on groove is opened at the bottom of the limit groove, an installation groove is opened at the bottom of the power-on groove, a buffer spring is installed at the bottom of the inner wall of the installation groove, a blocking column is installed on the top of the buffer spring, a limit plate is fixedly installed on the top of the blocking column, a clamping column is clamped inside the limit groove, a power-on column is installed at the bottom of the clamping column, and an upper shell is fixedly installed on the top of the clamping column.

[0004] Prior art such as the above-mentioned patent does not require the removal or modification of wires during current detection. However, during the closed-loop detection process, on the one hand, there are multiple wires arranged in parallel in the voltage box, which are limited by the internal space of the voltage box, and it is inconvenient for workers to install current transformers multiple times. On the other hand, if the worker installs the current transformer close to the voltage box, there is a safety risk for the worker. Summary of the invention

[0005] The purpose of the present invention is to provide a portable ring closing detection device to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable closed-loop detection device, comprising an operating rod and a current transformer, characterized in that the ring of the current transformer comprises a parallel first connection unit, two parallel second connection units and a third connection unit, the first connection unit, the third connection unit and the two second connection units all comprise a shell, an iron core arranged in the shell and a winding coil wound on the iron core; the first connection unit is fixedly connected to one end of the operating rod, the two ends of the first connection unit are respectively slidably connected to a second connection unit, the two second connection units respectively have a convex connection position of the first connection unit in the sliding stroke, at least one of the two second connection units is in the connection position, and the second connection unit and the third connection unit located at the connection position are detachably connected; when the two second connection units are both in the connection position, a ring-shaped closed structure is formed between the first connection unit, the third connection unit and the two second connection units.

[0007] Furthermore, a trigger assembly is disposed between each of the second connection units and the first connection unit, and the trigger assembly includes: a trigger block fixedly connected to the corresponding second connection unit; The first elastic member drives the corresponding second connecting unit to slide to the connecting position during the process of restoring its deformation.

[0008] Furthermore, a plug-in mechanism is provided between the two second connection units and the third connection unit, and the two second connection units are respectively plugged in and matched with the third connection unit through corresponding plug-in structures. The plug-in mechanism includes a pin fixedly connected to the corresponding second connection unit and a socket opened on the third connection unit and plugged in and matched with the pin.

[0009] Furthermore, a clamping mechanism is provided between the two second connection units and the third connection unit, and the two second connection units are respectively clamped and cooperated with the third connection unit through corresponding clamping structures, and the clamping mechanism includes: a fixed rod, which is fixedly connected to the corresponding second connection unit, and a connecting rod is fixedly connected thereto; a rotating shaft, which is rotatably connected in the third connection unit, and an arc ring is fixedly connected thereto, and a first arc surface and a second arc surface are provided at one end of the arc ring, and the arc ring has a clamping position capable of clamping the connecting rod in its rotational stroke relative to the third connection unit; a second elastic member, which drives the arc ring to rotate to the clamping position during the process of restoring its deformation.

[0010] Furthermore, it also includes at least one group of limiting mechanisms, which include: a connecting rod, which is fixedly connected to one of the second connecting units; a sliding rod, which is slidably connected to the first connecting unit and has an arc surface at one end; a connecting block, which is fixedly connected to the other second connecting unit and has a limiting groove thereon; a third elastic member, one end of which is connected to the first connecting unit and the other end is connected to the sliding rod.

[0011] Furthermore, the operating rod is an electric telescopic rod, and a push rod of the electric telescopic rod is fixedly connected to the first connecting unit.

[0012] Furthermore, the trigger block is in the shape of a triangular prism, and the triangular prism has a first inclined surface and a second inclined surface.

[0013] Furthermore, two L-shaped guide rods are fixedly connected to the operating rod, and two sliding members are respectively slidably connected to the guide rods. The first elastic member includes a first spring, one end of the first spring is connected to the corresponding second connecting unit, and the other end is connected to the corresponding guide rod.

[0014] Furthermore, the second elastic member includes a torsion spring, one end of which is connected to the rotating shaft, and the other end of which is connected to the third connecting unit.

[0015] In the above technical scheme, the present invention provides a portable loop detection device. During the process of current detection on multiple parallel-arranged wires inside the voltage box, the worker controls the operating rod to move the current transformer to the side of the wire, and the worker controls a second connection unit closer to the wire to slide relative to the first connection unit first, and while the second connection unit slides, the operating rod must also be moved to make the wire enter the C-shaped package formed by the first connection unit, the third connection unit and another second connection unit, and then the operating rod is controlled to remain stationary so that the second connection unit away from the third connection unit slides to the connection position. At this time, both second connection units are at the connection position, and a ring-shaped closed structure is formed between the first connection unit, the third connection unit and the two second connection units, which can detect the current of the wire passing through the current transformer. After the detection, the other second connection unit is controlled to be away from the connection position so that the wire moves out of the current transformer enclosure, and each parallel-arranged wire is detected in turn according to this operation.

[0016] On the one hand, the worker can control the position of the operating lever and the two second connecting units so that the parallel wires can respectively and sequentially pass through the closed structure formed by the current transformer, thereby facilitating the worker's measurement work. On the other hand, the worker controls the current transformer by manipulating the operating lever and other structures. The worker is far away from the wires, which can reduce the risk of the worker detecting the current of the wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure of a detection device provided in an embodiment of the present invention; Figure 2 A schematic diagram of a structure in which an electric wire provided in an embodiment of the present invention is about to pass through a current transformer; Figure 3 The embodiment of the present invention provides Figure 2 The enlarged structural diagram at A in the middle; Figure 4 The embodiment of the present invention provides Figure 2 The enlarged structural diagram at B in the middle; Figure 5 A schematic diagram of a clamping structure provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a current transformer through which electric wires pass provided by an embodiment of the present invention; Figure 7 A schematic diagram of a structure in which a wire is about to leave a current transformer provided by an embodiment of the present invention; Figure 8 A schematic diagram of the structure of the other side of the current transformer provided in an embodiment of the present invention; Fig. 9 The embodiment of the present invention provides Figure 8 Enlarged structural diagram at point C in the middle.

[0019] Description of reference numerals: 1. Operating rod; 11. Guide rod; 2. Current transformer; 201. Shell; 202. Iron core; 203. Winding coil; 21. First connecting unit; 22. Second connecting unit; 23. Third connecting unit; 231. Second elastic member; 3. Trigger assembly; 31. Trigger block; 311. First inclined surface; 312. Second inclined surface; 32. First elastic member; 4. Fixed rod; 41. Connecting rod; 5. Rotating shaft; 51. Arc ring; 511. First arc surface; 512. Second arc surface; 6. Limiting mechanism; 61. Connecting rod; 62. Sliding rod; 612. Arc surface; 63. Connecting block; 7. Wire. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] See also Figure 1-9A portable closed-loop detection device provided by an embodiment of the present invention includes an operating rod 1 and a current transformer 2. The ring of the current transformer 2 includes a parallel first connection unit 21, two parallel second connection units 22 and a third connection unit 23. The first connection unit 21, the third connection unit 23 and the two second connection units 22 all include a shell, an iron core 202 arranged in the shell and a winding coil 203 wound on the iron core 202; the first connection unit 21 is fixedly connected to one end of the operating rod 1, and the two ends of the first connection unit 21 are respectively slidably connected to a second connection unit 22. The two second connection units 22 have a convex connection position of the first connection unit 21 in the sliding stroke (sliding along the axial direction of the operating rod), and at least one of the two second connection units 22 is in the connection position, which is located at the connection position. The second connection unit 22 and the third connection unit 23 of the work station are detachably connected; when the two second connection units 22 are both in the connection station, an annular closed structure is formed between the first connection unit 21, the third connection unit 23 and the two second connection units 22, and the annular closed structure means that the shell 201 of the first connection unit 21 is in contact with the shells 201 of the two second connection units 22, and the iron core 202 and the winding coil 203 of the first connection unit 21 are in contact with the corresponding iron core 202 and the winding coil 203 of the two second connection units 22. In addition, the shell 201 of the third connection unit 23 is in contact with the shells 201 of the two second connection units 22, and the iron core 202 and the winding coil 203 of the third connection unit 23 are in contact with the corresponding iron core 202 and the winding coil 203 of the two second connection units 22 respectively.

[0022] In the above technical scheme, the present invention provides a portable loop detection device. During the process of current detection of multiple parallel-arranged wires 7 inside the voltage box, the worker controls the operating rod 1 to move the current transformer 2 to the side of the wire 7. The worker controls a second connection unit 22 closer to the wire 7 to slide relative to the first connection unit 21 first, and while the second connection unit 22 slides, the operating rod 1 is also moved to make the wire 7 enter the C-shaped package formed by the first connection unit 21, the third connection unit 23 and the other second connection unit 22. Then, the operating rod 1 is controlled to remain stationary so that the second connection unit 22 away from the third connection unit 23 slides to the connection position. At this time, the two second connection units 22 are both at the connection position, and a ring-shaped closed structure is formed between the first connection unit 21, the third connection unit 23 and the two second connection units 22, which can detect the current of the wire 7 passing through the current transformer 2. After the detection, the other second connection unit 22 is controlled to be away from the connection position so that the wire 7 moves out of the encirclement of the current transformer 2. According to this operation, each parallel-arranged wire 7 is detected in turn.

[0023] On the one hand, the worker can control the position of the operating lever 1 and the two second connecting units 22 so that the parallel wires 7 can respectively and sequentially pass through the closed structure formed by the current transformer 2, thereby facilitating the worker's measurement work. On the other hand, the worker controls the current transformer 2 by manipulating the operating lever 1 and other structures. The worker is far away from the wire 7, which can reduce the risk of the worker detecting the current of the wire 7.

[0024] As one of the embodiments of the present invention, a plug-in mechanism is provided between the two second connection units 22 and the third connection unit 23. The two second connection units 22 are respectively plugged and matched with the third connection unit 23 through corresponding plug-in structures (not shown in the figure). The plug-in mechanism includes a pin fixedly connected to the corresponding second connection unit 22 and a socket provided on the third connection unit 23 and plugged and matched with the pin. When one of the second connection units 22 is away from the connection station, the pin on this second connection unit 22 gradually disengages from the corresponding socket on the third connection unit 23, while the plug rod on the other second connection unit 22 is still plugged and matched with the corresponding socket on the third connection unit 23. Multiple plug-in mechanisms can be provided between the two second connection units 22 and the third connection unit 23.

[0025] As another embodiment of the present invention, refer to Figure 3 , Figure 4 as well as Figure 5 A clamping mechanism is provided between the two second connection units 22 and the third connection unit 23. The two second connection units 22 are respectively clamped and matched with the third connection unit 23 through corresponding clamping structures. The clamping mechanism includes a fixed rod 4, a rotating shaft 5, and a second elastic member 231. The fixed rod 4 is fixedly connected to the corresponding second connection unit 22, and a connecting rod 41 is fixedly connected to the fixed rod 4; the rotating shaft 5 is rotatably connected in the third connection unit 23, and an arc ring 51 is fixedly connected to the rotating shaft 5. One end of the arc ring 51 is provided with a first arc surface 511 and a second arc surface 512. The arc ring 51 has a clamping position that can clamp the connecting rod 41 in the rotation stroke relative to the third connection unit 23; the second elastic member 231 drives the arc ring 51 to rotate to the clamping position during the process of restoring the deformation. The second elastic member 231 includes a torsion spring, one end of which is connected to the rotating shaft 5, and the other end is connected to the third connection unit 23.

[0026] Taking one of the second connecting units 22 as an example, when the second connecting unit 22 is out of the connecting position, the connecting rod 41 on the second connecting unit 22 abuts against the first arc surface 511 of the arc ring 51, so that the arc ring 51 rotates relative to the third connecting unit 23, and the arc ring 51 is out of the clamping position. When the connecting rod 41 is no longer in abutment with the arc ring 51, the rotating shaft 5 on the arc ring 51 is driven by the restoring deformation force of the torsion spring to reset the arc ring 51 to the clamping position again, and when the second connecting unit 22 is reset to the connecting position During the process, the connecting rod 41 first abuts against the second curved surface 512 of the arc ring 51, so that the arc ring 51 is disengaged from the clamping position. When the upper edge of the connecting rod 41 abuts against the third connecting unit 23 and the connecting rod 41 no longer abuts against the arc ring 51, the rotating shaft 5 is driven by the restoring deformation force of the torsion spring to restore the arc ring 51 to the clamping position. At this time, the connecting rod 41 is in the recessed portion of the arc ring 51, and the elastic clamping of the connecting rod 41 is achieved under the joint action of the arc ring 51 and the shell 201 of the third connecting unit 23.

[0027] Among them, a trigger assembly 3 is arranged between the two second connection units 22 and the first connection unit 21, and the trigger assembly 3 includes a trigger block 31 and a first elastic member 32. The trigger block 31 is fixedly connected to the corresponding second connection unit 22; the first elastic member 32 drives the corresponding second connection unit 22 to slide to the connection position during the process of restoring the deformation. The trigger block 31 is a triangular prism, and the triangular prism has a first inclined surface 311 and a second inclined surface 312. Two L-shaped guide rods 11 are fixedly connected to the operating rod 1, and the two sliding members are respectively slidably connected to the guide rod 11. The first elastic member 32 includes a first spring, one end of the first spring is connected to the corresponding second connection unit 22, and the other end is connected to the corresponding guide rod 11.

[0028] Take one of the wires 7 as an example. When the wire 7 is about to enter the closed loop of the current transformer 2, the wire 7 first contacts the trigger assembly 3 on the second connecting unit 22 closest to the wire 7, and the wire 7 contacts the first inclined surface 311 of the trigger block 31. The trigger block 31 is abutted by the wire 7 so that the second connecting unit 22 is away from the connection position. Then, as the current transformer 2 moves, the wire 7 gradually enters the closed loop of the current transformer 2. When the wire 7 is no longer abutted against the first inclined surface 311, the trigger block 31 is subjected to the elastic force of the first spring so that the corresponding second connecting unit 22 gradually slides toward the connection position until it reaches the connection position. At this time, the wire 7 is already in the closed loop of the current transformer 2. The current of this wire 7 is recorded by observing the value of the ammeter (it is worth mentioning that when connecting before measurement, pay attention to the terminal polarity to ensure correct connection. Generally, the current enters from the P1 side of the transformer and exits from the P2 side. The secondary side current enters from the S1 side of the transformer. Flows out and enters the positive terminal of the ammeter, and flows into the secondary terminal S2 of the current transformer 2 after coming out of the negative terminal of the ammeter); after detection, the current transformer 2 is moved by moving the operating rod 1, and the wire 7 contacts the second inclined surface 312 of another trigger block 31, so that the corresponding second connecting unit 22 on the trigger block 31 gradually moves away from the connecting position, and the current transformer 2 continues to be moved until the wire 7 no longer contacts the second inclined surface 312 of the trigger block 31, and the second connecting unit 22 gradually slides to the connecting position under the elastic force of the corresponding first spring; it is worth mentioning that the trigger block 31 is set to a triangular prism shape so that the trigger block 31 has a first inclined surface 311 and a second inclined surface 312, so that the trigger block 31 can be triggered by the contact of the wire 7 with the first inclined surface 311 or the contact of the wire 7 with the second inclined surface 312.

[0029] Among them, it also includes at least one group of limiting mechanisms 6, which include a connecting rod 61, a sliding rod 62, a connecting block 63 and a third elastic member. The connecting rod 61 is fixedly connected to one of the second connecting units 22; the sliding rod 62 is slidably connected to the first connecting unit 21, and one end of the sliding rod 62 is provided with an arc surface 612; the connecting block 63 is fixedly connected to the other second connecting unit 22, and a limiting groove is provided on the connecting block 63; one end of the third elastic member (not shown in the figure) is connected to the first connecting unit 21, and the other end is connected to the sliding rod 62; refer to Figure 8, taking the left side of the operating rod 1 as the left second connecting unit 22 and the right side of the operating rod 1 as the right second connecting unit 22 as an example, a set of limiting mechanisms 6 here is used to keep the right second connecting unit 22 in the connecting position when the left second connecting unit 22 slides (even if other wires 7 touch the trigger block 31 on the right second connecting unit 22, the second connecting unit 22 cannot be separated from the connecting position). Specifically, when the wire 7 contacts the trigger block 31 on the left second connecting unit 22 to make the left second connecting unit 22 separate from the connecting position, when the left second connecting unit 22 is in the process of separating from the connecting position, the connecting rod 61 on the left second connecting unit 22 abuts against the arc surface 612 of the sliding rod 62, so that the sliding rod 62 slides toward the connecting block 63 until the sliding rod 6 2 is inserted into the limiting groove in the connecting block 63, and one end of the sliding rod 62 is in contact with the connecting rod 61, so that the right second connecting unit 22 cannot slide relative to the first connecting unit 21. When the left second connecting unit 22 is reset to the connecting position again, the sliding rod 62 is acted upon by the third elastic member so that the sliding rod 62 gradually disengages from the limiting groove of the connecting block 63, so that the right second connecting unit 22 can slide relative to the first connecting unit 21. It is worth mentioning that two groups of limiting mechanisms 6 are included, one group of limiting mechanisms 6 is used to keep the right second connecting unit 22 at the connecting position when the left second connecting unit 22 slides, and the other group of limiting mechanisms 6 is used to keep the left second connecting unit 22 at the connecting position when the right second connecting unit 22 slides.

[0030] Among them, the operating rod 1 is an electric telescopic rod, the push rod of the electric telescopic rod is fixedly connected to the first connecting unit 21. The electric telescopic rod (the prior art will not be described in detail here) can facilitate the worker to control the distance between the current transformer 2 and the worker, and retract the push rod of the electric telescopic rod when not in use, thereby facilitating the worker to carry it. An insulating rubber sleeve is provided on the sleeve rod shell of the electric telescopic rod.

[0031] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A portable loop detection device, comprising an operating rod and a current transformer, characterized in that: The ring of the current transformer includes a parallel first connection unit, two parallel second connection units and a third connection unit, wherein the first connection unit, the third connection unit and the two second connection units all include a shell, an iron core arranged in the shell and a winding coil wound on the iron core; The first connection unit is fixedly connected to one end of the operating rod, and both ends of the first connection unit are slidably connected to a second connection unit, and the two second connection units respectively have a connection position of the first connection unit in the sliding stroke, and at least one of the two second connection units is in the connection position, and the second connection unit and the third connection unit located at the connection position are detachably connected; When the two second connecting units are both in the connecting position, an annular closed structure is formed between the first connecting unit, the third connecting unit and the two second connecting units.

2. A portable ring closing detection device according to claim 1, characterized in that: A trigger component is disposed between each of the second connection units and the first connection unit, and the trigger component includes: A trigger block, which is fixedly connected to the corresponding second connecting unit; The first elastic member drives the corresponding second connecting unit to slide to the connecting position during the process of restoring its deformation.

3. A portable ring closing detection device according to claim 1, characterized in that: A plug-in mechanism is provided between the two second connection units and the third connection unit. The two second connection units are plug-in matched with the third connection unit through corresponding plug-in structures. The plug-in mechanism includes a pin fixedly connected to the corresponding second connection unit and a socket opened on the third connection unit and plug-in matched with the pin.

4. A portable ring closing detection device according to claim 1, characterized in that: A clamping mechanism is provided between the two second connection units and the third connection unit, and the two second connection units are respectively clamped and matched with the third connection unit through corresponding clamping structures, and the clamping mechanism includes: A fixing rod, which is fixedly connected to the corresponding second connecting unit and to which a connecting rod is fixedly connected; A rotating shaft, which is rotatably connected in the third connecting unit, and is fixedly connected to an arc ring, one end of which is provided with a first arc surface and a second arc surface, and the arc ring has a clamping position capable of clamping the connecting rod in the rotation stroke relative to the third connecting unit; The second elastic member drives the arc-shaped ring to rotate to the clamping position during the process of restoring its deformation.

5. A portable ring closing detection device according to claim 1, characterized in that: It also includes at least one set of limiting mechanisms, the limiting mechanisms including: A connecting rod fixedly connected to one of the second connecting units; A sliding rod, which is slidably connected to the first connecting unit and has an arc surface at one end; A connecting block, which is fixedly connected to another second connecting unit and has a limiting groove thereon; The third elastic member has one end connected to the first connecting unit and the other end connected to the sliding rod.

6. A portable ring closing detection device according to claim 1, characterized in that: The operating rod is an electric telescopic rod, and a push rod of the electric telescopic rod is fixedly connected to the first connecting unit.

7. A portable ring closing detection device according to claim 2, characterized in that: The trigger block is in the shape of a triangular prism, and the triangular prism has a first inclined surface and a second inclined surface.

8. A portable ring closing detection device according to claim 2, characterized in that: Two L-shaped guide rods are fixedly connected to the operating rod, and two sliding members are respectively slidably connected to the guide rods. The first elastic member includes a first spring, one end of the first spring is connected to the corresponding second connecting unit, and the other end is connected to the corresponding guide rod.

9. A portable ring closing detection device according to claim 4, characterized in that: The second elastic member includes a torsion spring, one end of which is connected to the rotating shaft, and the other end of which is connected to the third connecting unit.

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