Combined mutual inductor and disassembly method thereof

Abstract

The present invention relates to the field of electric power detection equipment, and specifically to a combined mutual inductor and a disassembly method thereof, comprising two groups of semi-circular ring-shaped casings, the ends of the two groups of casings abut against each other to form a ring, the two groups of casings are both provided with semi-circular ring-shaped iron cores, and one end of the iron core extends out of the casing, and the other end is received in the end face of the casing, and a connector is provided outside the end of the iron core extending out of the casing; one end of the connector is a hinged end hinged to the casing, and the other end outside the connector is a free end connected to adjacent casings. The beneficial effect is that the present invention improves the convenience of disassembly and connection of the two groups of casings by setting a connector as a combined connection structure of the two groups of casings, and the rotatable connector is rotated to the outside of the casing as a combined connector; and the connector can be rotated to the end of the casing after the two groups of casings are separated, so as to use the connector to cover and protect the end of the iron core extending out of the casing, thereby improving the protection capability of the iron core.

Description

Technical Field

[0001] The present invention relates to the field of electric power detection equipment, and in particular to a combined mutual inductor and a disassembly method thereof. Background Art

[0002] The function of a current transformer is to convert a larger primary current into a smaller secondary current by setting a ratio, which is used for protection, measurement and other purposes. When the power line is not cut off, the transformer can be used to detect current and electric energy. Transformers are widely used in electronic equipment, power systems, communication equipment and various control circuits, and are an indispensable component of electronic and power technology.

[0003] The combined transformer mainly includes two separable halves of a shell with a built-in iron core. The ends of the built-in iron cores of the two sets of shells are abutted to form a closed iron core surrounding the conductor to be tested. The current combined transformers are mostly set to be clamp-shaped or ring-shaped with two halves. When in the separated state, the iron core contact surface of the combined end face of the transformer protrudes outward. Since the transformer is an open-and-close precision transformer, its test data is easily affected by the contact tightness of the iron core end faces after the combination abuts. However, the iron core end faces of the current combined transformer are in an unprotected state when in the separated state, and are easily deformed by collision or contaminated by contact with foreign objects. They need to be wiped and cleaned before use, which is inconvenient to operate. At the same time, the current combined transformer cannot be locked at any position in the length direction of conductors of different sizes to be tested. During the test, the transformer needs to be manually held to keep it centered and in a stable position, which is inconvenient to operate and dangerous. Summary of the Invention

[0004] The purpose of the present invention is to provide a combined mutual inductor and a disassembly method thereof in order to solve the above-mentioned problems. By setting a connector as a combined connection structure of two sets of casings, the rotatable connector is rotated to the outside of the casing as a combined connecting piece, thereby improving the convenience of disassembling and connecting the two sets of casings; and the connector can be rotated to the end of the casing after the two sets of casings are separated, so that the connector can be used to cover and protect one end of the iron core extending out of the casing, thereby improving the protection capability of the iron core, as described below for details.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The present invention provides a combined mutual inductor, comprising two sets of semi-circular housings, the ends of the two sets of housings abutting against each other to form a ring, and a semi-circular iron core disposed inside each set of housings, with one end of the iron core extending out of the housing and the other end retracted into the end face of the housing, and a connector disposed on the outside of the end of the iron core extending out of the housing;

[0007] One end of the connector is a hinged end hinged to the casing, and the other end outside the connector is a free end connected to the adjacent casing. The end face of the casing is provided with a positioning hole for accommodating the iron core. The upper and lower sides of the casing where the iron core extends out of one end of the casing are provided with closed grooves, and the upper and lower sides of the other end of the casing are provided with assembly grooves. The free end of the connector is provided with a buckle that snaps into place with the assembly groove.

[0008] Preferably, the upper and lower sides of the casing near one end of the closed slot are provided with a rotating shaft, and the hinged end of the connector is fixed with a rotating ear hingedly matched with the rotating shaft. The connector is a rectangular frame structure, and the connector can be rotated to abut the side of the iron core end face under the support of the rotating shaft. A protective pad is provided in the middle of the connector to cover and protect the iron core end face when it is rotated to the end of the casing, and a wedge-shaped clamping block is fixed to the buckle end. When the connector is rotated to abut the iron core end face, the clamping block is clamped and matched with the closed slot.

[0009] Preferably, two groups of clamping assemblies are arranged on the inner side of the casing around the axis of the casing, and a mounting frame supporting the clamping assemblies is fixed to the opening on the inner side of the casing.

[0010] Preferably, the mounting bracket includes a semi-circular receiving groove body adapted to the opening of the casing, and the upper and lower openings of the receiving groove body extend outward to form wing plates that close the inner opening of the casing.

[0011] Preferably, the clamping assembly includes a retaining frame extending into the interior of the accommodating slot body, the retaining frame is a C-shaped frame with an opening toward the axis of the casing, both ends of the retaining frame are penetrated by sliding grooves, a U-shaped guide rod with an opening toward the axis of the casing is fixed to the rear side of the retaining frame, a sliding hole for accommodating the guide rod is penetrated on the rear side of the accommodating slot body, and the guide rod is clearance-matched with the sliding hole.

[0012] Preferably, two groups of symmetrically distributed sliders are slidingly arranged inside the two groups of sliding grooves of the clamping assembly, and the middle parts of the two groups of sliders are rotatably connected with a wheel axle, and a positioning wheel extending out of the retaining frame is coaxially fixed to the outside of the middle section of the wheel axle, and shaft sleeves are fixed to the outer side of the wheel axle at both ends of the positioning wheel, and clamps corresponding to the distribution of the shaft sleeves are fixed inside the retaining frame, and the clamps are C-shaped structures with the opening facing the shaft sleeve.

[0013] Preferably, the clamp is made of tough stainless steel, both ends of the clamp extend outward to form an arc-shaped expansion, the sleeve is an elastic rubber sleeve structure, and the inner diameter of the clamp is smaller than the outer diameter of the sleeve, and a fastening hole is vertically passed through the middle of the accommodating groove body on both sides of the retaining frame, and the middle thread of the casing is matched with a fastening screw that vertically passes through the fastening hole, and the fastening screw is gap-fitted with the fastening hole, and both ends of the wheel axle pass outward from the slider.

[0014] Preferably, an operating piece extending along the outer circumference of the casing is provided on the outside of the casing, and a side groove for accommodating the operating piece is provided on the outside of the casing. The ends of the two groups of operating pieces of the two groups of casings are abutted against each other, and a guide hole is passed through the middle section of the casing on the inside of the side groove. A rib is fixed to the middle part of the operating piece, which extends along the guide hole and extends into the two groups of iron cores inside the casing, and the rib is gap-fitted with the guide hole.

[0015] Preferably, two groups of guide grooves corresponding to the distribution of the clamping components are vertically penetrated on the rib plate, and the guide groove is arc-shaped. The middle section of the guide rod vertically penetrates the guide groove, and the guide rod is loosely fitted with the guide groove. An auxiliary groove is vertically penetrated in the middle of the rib plate, and a support rod is fixed in the auxiliary groove along the radial direction of the casing. A positioning piece that slides along the auxiliary groove is passed through the outside of the support rod, and a spring is sleeved on the outside of the support rod to keep the positioning piece against the inner wall of the casing. The outside of the operating piece is provided with an outward-protruding indicating convex pattern along its length.

[0016] The disassembly method of the combined mutual inductor is characterized by comprising the following steps:

[0017] a. When the combined mutual inductor needs to be sleeved onto the outside of the cable to be tested, the connector is pushed outward to remove the buckle at its free end from the assembly groove of the adjacent housing, so that the two sets of separated housings are buckled onto the two sides of the outside of the conductor to be tested, and then the ends of the two sets of housings are kept in contact, so that the protruding part of the iron core inside one set of housings is embedded in the positioning hole of the other set of housings, and the ends of the iron cores of the two sets of housings are abutted. At the same time, the connector is reset to a position that fits the outer circumference of the housing, and the block at the end of the buckle is again embedded in the assembly groove of the housing, thereby completing the assembly process of the two sets of housings on the outer circumference of the conductor to be tested;

[0018] b. The conductor to be tested is clamped by four clamping assemblies between the two sets of housings. During operation, the operating pieces in the grooves on the outer circumference of the housing are toggled, and the ends of the two sets of operating pieces abut against each other, thereby ensuring that the two sets of operating pieces rotate synchronously. The ribs on the inner side of the operating pieces extend into the housing to support the guide rods of the clamping assemblies. The arc-shaped guide grooves on the ribs support the guide rods and drive the entire clamping assembly to translate radially along the housing.

[0019] c. Change the radial position of the clamping assembly in the housing. When the positioning wheel of the clamping assembly contacts the outer circumference of the conductor to be measured, the rotation of the operating piece is hindered, completing the pre-positioning of the combination transformer outside the conductor to be measured. At this time, the positioning wheel and the wheel shaft are in a rotatable state supported by the slider to adjust the relative position of the combination transformer in the length direction of the conductor to be measured;

[0020] d. After the combined transformer moves to the desired detection position in the length direction of the conductor to be measured, continue to rotate the operating piece to support the clamping assembly to move toward the conductor to be measured, while the positioning wheel is blocked by the outer circumference of the conductor to be measured and remains stationary. The positioning wheel, wheel shaft, shaft sleeve and slider slide inside the slide groove, and the shaft sleeve is clamped into the clamp. At this time, the clamp clamps the shaft sleeve, keeping the wheel shaft and positioning wheel in a braking state, thereby maintaining the clamping stability of the combined transformer at the detection position;

[0021] e. After the inspection is completed, the operating piece is rotated to store the clamping assembly in the mounting frame. During the process of storing the clamping assembly as a whole in the accommodating tank, the fastening screw is used as a blocking structure for the part of the wheel axle extending out of the slider. When the wheel axle moves to contact the fastening screw, the retaining frame continues to move in the direction of approaching the category under the support of the guide rod. The fastening screw blocks the wheel axle from further movement, thereby automatically disengaging the sleeve stuck in the clamp from the clamp, thereby automatically releasing the braking state of the wheel axle and the positioning wheel, and realizing the reset action of the positioning wheel, wheel axle, sleeve and slider;

[0022] f. After separating the two sets of casings, rotate the connector to the side close to the end face of the casing under the support of the rotating shaft, and insert the connector's block into the closed groove on the outside of the same end of the casing to fix the connector to the end of the casing. That is, the connector covers the end of the iron core extending out of the casing, and the protective pad abuts against the iron core end face to protect the iron core contact surface.

[0023] The beneficial effects are as follows: 1. The present invention provides a connector as a combined connection structure of two sets of housings, and the rotatable connector is rotated to the outside of the housing to serve as a combined connection piece, thereby improving the convenience of disassembling and connecting the two sets of housings;

[0024] The connector can be rotated to the end of the casing after the two sets of casings are separated, so that the connector can be used to cover and protect the end of the iron core extending out of the casing, so as to prevent the protruding end of the iron core from being bumped or contacted by foreign objects, thereby improving the protection capability of the iron core and avoiding manual cleaning of the iron core end face during use;

[0025] At the same time, two sets of operating pieces are provided that abut against each other and can rotate synchronously outside the two sets of housings. The arc-shaped guide grooves on the operating pieces serve as position adjustment components for the four sets of clamping assemblies. During the synchronous rotation of the two sets of operating pieces, the four sets of clamping assemblies can be synchronously extended or retracted to clamp and position conductors of different thicknesses to be tested, thereby adapting to the use of different products.

[0026] In addition, a clamp that can be clamped and locked with a locking sleeve is provided on the inner side of the retaining frame of the clamping assembly. The operating piece is rotated to support the positioning wheel of the clamping assembly to press against the conductor to be measured, and the retaining frame is used to drive the clamp to move and clamp to the outside of the sleeve, so that the sleeve is automatically locked by the clamp, and the rotation braking lock of the positioning wheel is completed, so that the transformer is clamped and locked to any position in the length direction of the conductor to be measured. The locking and unlocking actions of the positioning wheel can be realized as needed through the operating piece, and there is no need to manually maintain the transformer detection position, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a top view of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the structural split of the present invention;

[0031] Figure 4 Is a schematic diagram of the three-dimensional structure of the casing of the present invention;

[0032] Figure 5 Is a schematic diagram of the three-dimensional structure of the mounting frame of the present invention;

[0033] Figure 6 Is a schematic diagram of the three-dimensional structure of the connector of the present invention;

[0034] Figure 7 Is a schematic diagram of the three-dimensional structure of the clamping assembly of the present invention;

[0035] Figure 8 Is a schematic diagram of the structure of the clamping assembly of the present invention is split;

[0036] Figure 9 Is a schematic diagram of the three-dimensional structure of the operating piece of the present invention;

[0037] Figure 10 Is a schematic diagram of the three-dimensional structure of another direction of the present invention;

[0038] Figure 11 It is a schematic diagram of the structural disassembly of another aspect of the present invention.

[0039] The following are the descriptions of the reference numerals:

[0040] 1. Casing; 101. Positioning hole; 102. Rotating shaft; 103. Assembly slot; 104. Closing slot; 105. Side slot; 106. Guide hole; 107. Fastening screw; 2. Iron core; 3. Connector; 301. Rotating ear; 302. Buckle; 302a. Block; 303. Protective pad; 4. Mounting frame; 401. Accommodating slot; 402. Wing plate; 403. Fastening hole; 4 04. Slide hole; 5. Clamping assembly; 501. Retaining frame; 501a. Slide groove; 502. Axle; 503. Positioning wheel; 504. Slider; 505. Bushing; 506. Clamp; 507. Guide rod; 6. Operating piece; 601. Rib; 602. Guide groove; 603. Indicating ridge; 604. Auxiliary groove; 605. Positioning piece; 606. Support rod; 607. Spring. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0042] See also Figures 1-11 As shown, the present invention provides a combined mutual inductor, comprising two sets of semi-circular casings 1, the ends of the two sets of casings 1 abutting against each other to form a ring, so as to facilitate the buckling of the mutual inductor housing to the outside of the conductor to be measured. A semi-circular iron core 2 is provided inside each set of casings 1, and one end of the iron core 2 extends out of the casing 1, and the other end is retracted into the end surface of the casing 1, so as to facilitate the combined connection of the iron core 2 by buckling the two sets of casings 1. A connector 3 is provided on the outside of the end of the iron core 2 extending out of the casing 1. The connector 3 is used to connect the two sets of casings 1 when the two sets of casings 1 are in a combined state, and to protect the end of the iron core 2 extending out of the casing 1 when the two sets of casings 1 are in a separated state;

[0043] Specifically, one end of the connector 3 is the hinged end of the hinged casing 1, and the other end outside the connector 3 is the free end connected to the adjacent casing 1. The end face of the casing 1 is provided with a positioning hole 101 for accommodating the iron core 2. The upper and lower sides of the casing 1 where the iron core 2 extends out of one end of the casing 1 are provided with closed grooves 104, and the upper and lower sides of the other end of the casing 1 are provided with assembly grooves 103. The free end of the connector 3 is provided with a snap-fitting buckle 302 for snap-fitting the assembly groove 103. When the connector 3 is rotated to the end face of the casing 1, the snap-fitting buckle 302 can snap-fit ​​with the closed groove 104.

[0044] As an optional embodiment, the upper and lower sides of the end of the casing 1 near the closed slot 104 are provided with a rotating shaft 102, and the hinged end of the connector 3 is fixed with a rotating ear 301 that is hingedly matched with the rotating shaft 102. The connector 3 is a rectangular frame structure. The connector 3 can be rotated to abut the end face of the iron core 2 under the support of the rotating shaft 102. A protective pad 303 is provided in the middle of the connector 3 to cover and protect the end face of the iron core 2 when it is rotated to the end of the casing 1, so as to improve the covering and protection effect of the connector 3 on the iron core 2. A wedge-shaped clamping block 302a is fixed to the end of the buckle 302. When the connector 3 is rotated to abut the end face of the iron core 2, the clamping block 302a is engaged with the closed slot 104, thereby improving the clamping stability of the connector 3 on the outside of the casing 1;

[0045] Two sets of clamping assemblies 5 are arranged on the inside of the casing 1 around the axis of the casing 1, and a mounting frame 4 that supports the clamping assemblies 5 is fixed to the inner opening of the casing 1. The mounting frame 4 includes a semi-circular shaped receiving groove 401 that adapts to the opening of the casing 1. The upper and lower openings of the receiving groove 401 extend outward to form wing plates 402 that close the inner opening of the casing 1. A semi-circular cavity for accommodating the iron core 2 is formed between the outer side of the receiving groove 401 and the casing 1;

[0046] The clamping assembly 5 includes a retaining frame 501 extending into the interior of the accommodating groove body 401. The retaining frame 501 is a C-shaped frame with an opening facing the axis of the housing 1. A slide groove 501a is passed through both ends of the retaining frame 501. A U-shaped guide rod 507 with an opening facing the axis of the housing 1 is fixed to the rear side of the retaining frame 501. A slide hole 404 for accommodating the guide rod 507 is passed through the rear side of the accommodating groove body 401. The guide rod 507 and the slide hole 404 are clearance-matched to ensure that the guide rod 507 can slide radially along the housing 1 in the slide hole 404, thereby realizing the position adjustment action of the retaining frame 501. Two sets of symmetrically distributed sliders 504 are slidably provided inside the two sets of slide grooves 501a of the clamping assembly 5. The middle parts of the two sets of sliders 504 are rotatably connected to the wheel shaft 502. A positioning wheel 503 extending from the holder 501 is coaxially fixed to the outside of the middle section of the wheel shaft 502. The positioning wheel 503 serves as a support and positioning structure for the conductor to be measured inside the housing 1. Bushings 505 are fixed to the outside of the wheel shaft 502 at both ends of the positioning wheel 503. Clamps 506 corresponding to the bushings 505 are fixed inside the holder 501. The clamps 506 are C-shaped structures with the opening facing the bushing 505.

[0047] Specifically, the clamp 506 is made of stainless steel with toughness. Both ends of the clamp 506 extend outward to form an arc-shaped expansion. The sleeve 505 is an elastic rubber sleeve structure, and the inner diameter of the clamp 506 is smaller than the outer diameter of the sleeve 505, ensuring that the sleeve 505 can be kept in a locked state after being clamped into the clamp 506 to prevent the sleeve 505, the axle 502 and the positioning wheel 503 from rotating. The middle part of the accommodating groove 401 on both sides of the retaining frame 501 is vertically penetrated with a fastening hole 403, and the middle thread of the housing 1 is matched with a fastening screw 107 that vertically penetrates the fastening hole 403 to fasten The screw 107 is loosely fitted in the fastening hole 403, and both ends of the wheel axle 502 extend outward through the sliders 504. With this arrangement, after the sleeve 505 is inserted into the clamp 506, the guide rod 507 can be pulled outward to pull the retaining frame 501 as a whole toward the fastening screw 107. When the outer end of the wheel axle 502 contacts the fastening screw 107, the sliding movement of the wheel axle 502 is blocked by the fastening screw 107. At this time, the sleeve 505 can be disengaged from the clamp 506, thereby releasing the braking state of the wheel axle 502, the sleeve 505, and the positioning wheel 503.

[0048] An operating piece 6 extending along the outer circumference of the housing 1 is provided on the outside of the housing 1. A side groove 105 is provided on the outside of the housing 1 to accommodate the operating piece 6. The ends of the two sets of operating pieces 6 of the two sets of housings 1 abut against each other, ensuring that the operating pieces 6 of the two sets of housings 1 can rotate synchronously, thereby keeping the four sets of clamping components 5 inside the two sets of housings 1 synchronously gathered or dispersed. A guide hole 106 is penetrated through the middle section of the housing 1 inside the side groove 105. A rib 601 is fixed to the middle of the operating piece 6 along the guide hole 106 and extends into the space between the two sets of iron cores 2 inside the housing 1. The rib 601 is clearance-matched with the guide hole 106.

[0049] Two sets of guide grooves 602 corresponding to the distribution of the clamping assembly 5 are vertically penetrated on the rib plate 601. The guide groove 602 is arc-shaped. The middle section of the guide rod 507 vertically penetrates the guide groove 602, and the guide rod 507 and the guide groove 602 are clearance-matched to ensure that when the operating piece 6 is rotated, the guide rod 507 can be supported by the arc-shaped guide groove 602 to drive the clamping assembly 5 to slide inward or outward as a whole. An auxiliary groove 604 is vertically penetrated in the middle of the rib plate 601. A support rod 606 is fixed in the radial direction of the housing 1 in the auxiliary groove 604, and a fixed rod 606 is provided on the outside of the support rod 606 to slide along the auxiliary groove 604. The positioning piece 605 and the support rod 606 are sleeved on the outside with a spring 607 for keeping the positioning piece 605 against the inner wall of the casing 1, so that the positioning piece 605 can be pressed against the inner wall of the casing 1 by the spring 607, thereby increasing the pressing force of the positioning piece 605 against the inner wall of the casing 1, thereby ensuring that the operating piece 6 can maintain a stable position on the outside of the casing 1, avoiding the reduction of the clamping force of the clamping assembly 5 on the conductor to be measured due to the movement of the position of the operating piece 6, and ensuring the clamping stability of the transformer on the conductor to be measured. The outside of the operating piece 6 is provided with an outward-protruding indicator ridge 603 along its length direction to improve the grip stability of pushing the operating piece 6 to rotate.

[0050] The disassembly method of the combined mutual inductor comprises the following steps:

[0051] a. When the combined mutual inductor needs to be sleeved onto the outside of the cable to be tested, the connector 3 is pushed outward to remove the buckle 302 at its free end from the assembly groove 103 of the adjacent housing 1, so that the two sets of separated housings 1 are buckled onto the two sides of the outside of the conductor to be tested, and then the ends of the two sets of housings 1 are kept in contact, so that the protruding part of the iron core 2 inside one set of housings 1 is embedded in the positioning hole 101 of the other set of housings 1, thereby abutting the ends of the iron core 2 of the two sets of housings 1, and at the same time, the connector 3 is reset to a position that fits the outer circumference of the housing 1, and the block 302a at the end of the buckle 302 is again embedded in the assembly groove 103 of the housing 1, thereby completing the assembly process of the two sets of housings 1 on the outer circumference of the conductor to be tested;

[0052] b. The conductor to be measured is clamped by four clamping assemblies 5 between the two sets of housings 1. During operation, the operating piece 6 in the outer circumferential side groove 105 of the housing 1 is moved, and the ends of the two sets of operating pieces 6 abut against each other, thereby ensuring that the two sets of operating pieces 6 rotate synchronously. The ribs 601 on the inner side of the operating piece 6 extending into the housing 1 support the guide rod 507 of the clamping assembly 5. The curved guide groove 602 on the rib 601 supports the guide rod 507, driving the clamping assembly 5 as a whole to translate radially along the housing 1;

[0053] c. Changing the radial position of the clamping assembly 5 within the housing 1. When the positioning wheel 503 of the clamping assembly 5 contacts the outer circumference of the conductor to be measured, the rotation of the operating piece 6 is hindered, completing the pre-positioning of the combined transformer outside the conductor to be measured. At this time, the positioning wheel 503 and the wheel shaft 502 are in a rotatable state supported by the slider 504, so that the relative position of the combined transformer in the length direction of the conductor to be measured can be adjusted;

[0054] d. After the combined transformer moves to the desired detection position in the length direction of the conductor to be measured, the operating piece 6 is further rotated to support the clamping assembly 5 to move in a direction close to the conductor to be measured. The positioning wheel 503 is blocked by the outer circumference of the conductor to be measured and remains stationary. The positioning wheel 503, the wheel axle 502, the shaft sleeve 505 and the slider 504 slide inside the slide groove 501a, and the shaft sleeve 505 is clamped into the clamp 506. At this time, the clamp 506 locks the shaft sleeve 505, keeping the wheel axle 502 and the positioning wheel 503 in a braking state, thereby maintaining the clamping stability of the combined transformer in the detection position;

[0055] e. After the inspection is completed, the operating piece 6 is rotated to receive the clamping assembly 5 into the mounting frame 4. During the process of receiving the clamping assembly 5 as a whole into the accommodating tank body 401, the fastening screw 107 is used as a blocking structure for the part of the wheel shaft 502 extending out of the slider 504. When the wheel shaft 502 moves to contact the fastening screw 107, the retaining frame 501 continues to move in the direction of approaching the category under the support of the guide rod 507. The fastening screw 107 blocks the wheel shaft 502 from continuing to move, thereby automatically disengaging the sleeve 505 clamped in the clamp 506 from the clamp 506, thereby automatically releasing the braking state of the wheel shaft 502 and the positioning wheel 503, and realizing the reset action of the positioning wheel 503, the wheel shaft 502, the sleeve 505 and the slider 504;

[0056] f. After separating the two sets of casings 1, rotate the connector 3 to the side close to the end face of the casing 1 under the support of the rotating shaft 102, and insert the clamping block 302a of the connector 3 into the closed groove 104 on the outer side of the same end of the casing 1 to fix the connector 3 to the end of the casing 1. That is, the connector 3 covers the end of the core 2 extending out of the casing 1, and the protective pad 303 abuts against the end face of the core 2 to protect the contact surface of the core 2;

[0057] By providing a connector 3 as a combined connection structure of the two sets of housings 1, the rotatable connector 3 is rotated to the outside of the housing 1 to serve as a combined connection piece, thereby improving the convenience of disassembling and connecting the two sets of housings 1;

[0058] The connector 3 can be rotated to the end of the casing 1 after the two sets of casings 1 are separated, so that the connector 3 can be used to cover and protect the end of the iron core 2 extending out of the casing 1, so as to prevent the protruding end of the iron core 2 from being bumped or contacted by foreign objects, thereby improving the protection capability of the iron core 2 and avoiding manual cleaning of the end surface of the iron core 2 during use;

[0059] At the same time, two sets of operating pieces 6 are provided to abut against each other so as to be able to rotate synchronously outside the two sets of housings 1. The arc-shaped guide grooves 602 on the operating pieces 6 serve as position adjustment components for the four sets of clamping assemblies 5. During the synchronous rotation of the two sets of operating pieces 6, the four sets of clamping assemblies 5 can be synchronously extended or retracted to clamp and position conductors of different thicknesses to be tested, thereby adapting to the use of different products.

[0060] In addition, a clamp 506 that can be clamped and locked with the locking sleeve 505 is provided on the inner side of the retaining frame 501 of the clamping assembly 5. The operating piece 6 is rotated to support the positioning wheel 503 of the clamping assembly 5 to press against the conductor to be measured, and the retaining frame 501 is used to drive the clamp 506 to move and clamp to the outside of the sleeve 505, so that the sleeve 505 is automatically locked by the clamp 506, completing the rotational braking lock of the positioning wheel 503, so that the transformer is clamped and locked to any position in the length direction of the conductor to be measured. The locking and unlocking actions of the positioning wheel 503 can be realized as needed through the operating piece 6, without the need to manually maintain the transformer detection position, which is more convenient to use.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A combined mutual inductor, comprising two sets of semi-circular housings (1), the ends of the two sets of housings (1) abutting against each other to form a ring, characterized in that: A semi-circular iron core (2) is disposed inside both sets of the casings (1), and one end of the iron core (2) extends out of the casing (1) and the other end is retracted into the end surface of the casing (1); a connector (3) is disposed outside the end of the iron core (2) extending out of the casing (1); One end of the connecting body (3) is a hinged end hinged to the housing (1), and the other end of the connecting body (3) is a free end connected to an adjacent housing (1); a positioning hole (101) for accommodating the iron core (2) is provided on the end surface of the housing (1); closed grooves (104) are provided on the upper and lower sides of the housing (1) at one end of the iron core (2) extending out of the housing (1); and assembly grooves (103) are provided on the upper and lower sides of the other end of the housing (1); and a buckle (302) for engaging with the assembly groove (103) is provided on the free end of the connecting body (3); Two groups of clamping assemblies (5) are arranged on the inner side of the housing (1) around the axis of the housing (1), and a mounting frame (4) supporting the clamping assemblies (5) is fixed at the inner opening of the housing (1); The mounting frame (4) comprises a semi-circular accommodating groove (401) adapted to fit the opening of the housing (1), and the upper and lower openings of the accommodating groove (401) both extend outwards to form a wing plate (402) that closes the inner opening of the housing (1); The clamping assembly (5) comprises a retaining frame (501) extending into the interior of the accommodating groove body (401), the retaining frame (501) being a C-shaped frame body with an opening facing the axis of the housing (1), a slide groove (501a) passing through both ends of the retaining frame (501), a U-shaped guide rod (507) with an opening facing the axis of the housing (1) being fixed to the rear side of the retaining frame (501), a slide hole (404) for accommodating the guide rod (507) passing through the rear side of the accommodating groove body (401), and the guide rod (507) and the slide hole (404) being clearance-matched; Two groups of symmetrically distributed sliders (504) are slidably arranged inside the two groups of slide grooves (501a) of the clamping assembly (5), and the middle parts of the two groups of sliders (504) are rotatably connected with a wheel shaft (502), and a positioning wheel (503) extending out of the retaining frame (501) is coaxially fixed to the outside of the middle section of the wheel shaft (502), and shaft sleeves (505) are fixed to the outside of the wheel shaft (502) at both ends of the positioning wheel (503), and a clamp (506) distributed corresponding to the shaft sleeve (505) is fixed inside the retaining frame (501), and the clamp (506) is a C-shaped structure with an opening facing the shaft sleeve (505); The clamp (506) is made of stainless steel with toughness. Both ends of the clamp (506) extend outward to form an arc-shaped expansion. The shaft sleeve (505) is an elastic rubber sleeve structure, and the inner diameter of the clamp (506) is smaller than the outer diameter of the shaft sleeve (505). A fastening hole (403) is vertically penetrated in the middle of the accommodating groove body (401) on both sides of the retaining frame (501). The middle part of the housing (1) is threadedly matched with a fastening screw (107) vertically penetrating the fastening hole (403). The fastening screw (107) is clearance-matched with the fastening hole (403). Both ends of the wheel shaft (502) pass out of the slider (504) outward. The housing (1) is provided with an operating sheet (6) extending along the outer circumference of the housing (1), and the housing (1) is provided with a side groove (105) on the outside for accommodating the operating sheet (6). The ends of the two groups of operating sheets (6) of the two groups of housings (1) are abutted against each other, and a guide hole (106) is penetrated through the middle section of the housing (1) inside the side groove (105). A rib plate (601) is fixed to the middle of the operating sheet (6) and extends along the guide hole (106) into the two groups of iron cores (2) inside the housing (1), and the rib plate (601) is clearance-matched with the guide hole (106); The rib plate (601) is vertically penetrated by two groups of guide grooves (602) corresponding to the distribution of the clamping components (5); the guide grooves (602) are arc-shaped; the middle section of the guide rod (507) vertically penetrates the guide groove (602); the guide rod (507) and the guide groove (602) are clearance-matched; an auxiliary groove (604) is vertically penetrated by the middle of the rib plate (601); a support rod (606) is fixed radially in the auxiliary groove (604) along the housing (1); a positioning piece (605) is slidably matched along the auxiliary groove (604) on the outside of the support rod (606); a spring (607) is sleeved on the outside of the support rod (606) for keeping the positioning piece (605) against the inner wall of the housing (1); and an outwardly protruding indicating convex pattern (603) is provided on the outside of the operating piece (6) along its length direction.

2. A combined mutual inductor according to claim 1, characterized in that: A rotating shaft (102) is provided on the upper and lower sides of one end of the housing (1) close to the closed slot (104); a rotating ear (301) hingedly matched with the rotating shaft (102) is fixed to the hinged end of the connecting body (3); the connecting body (3) is a rectangular frame structure; the connecting body (3) can be rotated to abut against one side of the end face of the iron core (2) under the support of the rotating shaft (102); a protective pad (303) is provided in the middle of the connecting body (3) for covering and protecting the end face of the iron core (2) when the connecting body (3) is rotated to the end of the housing (1); a wedge-shaped clamping block (302a) is fixed to the end of the buckle (302); when the connecting body (3) is rotated to abut against the end face of the iron core (2), the clamping block (302a) is clamped and matched with the closed slot (104).

3. The method for disassembling a combined mutual inductor according to claim 2, characterized in that: The following steps are involved: a. When it is necessary to sleeve the combined mutual inductor onto the outside of the cable to be tested, the connector (3) is pushed outward to remove the buckle (302) at its free end from the assembly groove (103) of the adjacent housing (1), so that the two sets of separated housings (1) are buckled onto the two sides of the outside of the conductor to be tested respectively, and then the ends of the two sets of housings (1) are kept in contact, so that the protruding part of the iron core (2) inside one set of housings (1) is embedded into the positioning hole (101) of the other set of housings (1), thereby abutting the ends of the iron cores (2) of the two sets of housings (1), and at the same time, the connector (3) is reset to a position fitting the outer circumference of the housing (1), and the block (302a) at the end of the buckle (302) is again embedded into the assembly groove (103) of the housing (1), thereby realizing the assembly process of the two sets of housings (1) on the outer circumference of the conductor to be tested; b. The conductor to be measured is clamped by four groups of clamping components (5) between two groups of housings (1). When operating, the operating piece (6) in the outer circumferential side groove (105) of the housing (1) is turned, and the ends of the two groups of operating pieces (6) are abutted against each other, thereby ensuring that the two groups of operating pieces (6) rotate synchronously, and the ribs (601) extending into the housing (1) from the inner side of the operating piece (6) are used to support the guide rod (507) of the clamping component (5), and the arc-shaped guide groove (602) on the ribs (601) is used to support the guide rod (507) to drive the clamping component (5) as a whole to translate radially along the housing (1); c. changing the radial position of the clamping assembly (5) on the housing (1); when the positioning wheel (503) of the clamping assembly (5) contacts the outer circumference of the conductor to be measured, the rotation of the operating piece (6) is hindered, and the combined mutual inductor is pre-positioned outside the conductor to be measured. At this time, the positioning wheel (503) and the wheel shaft (502) are in a rotatable state supported by the slider (504), so as to be able to adjust the relative position of the combined mutual inductor in the length direction of the conductor to be measured; d. After the combined mutual inductor moves to the desired detection position in the length direction of the conductor to be measured, the operating piece (6) is continuously rotated to support the clamping assembly (5) to move in a direction close to the conductor to be measured, while the positioning wheel (503) is blocked by the outer circumference of the conductor to be measured and remains stationary, the positioning wheel (503), the wheel shaft (502), the shaft sleeve (505) and the slider (504) slide inside the slide groove (501a), the shaft sleeve (505) is clamped into the clamp (506), and the clamp (506) clamps the shaft sleeve (505), keeping the wheel shaft (502) and the positioning wheel (503) in a braking state, thereby maintaining the clamping stability of the combined mutual inductor at the detection position; e. After the detection is completed, the operating piece (6) is rotated to store the clamping assembly (5) in the mounting frame (4). During the process of storing the clamping assembly (5) as a whole in the accommodating groove (401), the tightening screw (107) is used as a blocking structure for the portion of the wheel shaft (502) extending out of the slider (504). When the wheel shaft (502) moves to contact the tightening screw (107), the retaining frame (501) continues to move toward the rib plate under the support of the guide rod (507). The tightening screw (107) blocks the wheel shaft (502) from continuing to move, thereby automatically disengaging the shaft sleeve (505) clamped in the clamp (506) from the clamp (506), thereby automatically releasing the braking state of the wheel shaft (502) and the positioning wheel (503), thereby realizing the reset action of the positioning wheel (503), the wheel shaft (502), the shaft sleeve (505) and the slider (504); f. After the two sets of housings (1) are separated, the connecting body (3) is rotated to a side close to the end face of the housing (1) under the support of the rotating shaft (102), and the clamping block (302a) of the connecting body (3) is clamped into the closed groove (104) on the outer side of the same end of the housing (1) to fix the connecting body (3) to the end of the housing (1), that is, the end of the iron core (2) extending out of the housing (1) is covered by the connecting body (3), and the protection pad (303) is abutted against the end face of the iron core (2) to achieve protection of the contact surface of the iron core (2).

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