Insulating rod rope annular detection clamp and use method thereof

Abstract

The invention relates to an insulating rod rope annular detection clamp and a use method thereof, and belongs to the technical field of current detection equipment. According to the technical scheme, the device comprises a machine body, a fixed clamp and a movable clamp, the fixed clamp is arranged at the top of the machine body, the movable clamp is arranged on the top side of the fixed clamp in an openable mode, the fixed clamp and the movable clamp form a pincer-shaped cover body which can be separated and opened, and an iron core is arranged in the pincer-shaped cover body; the iron core comprises an upper half core fixed in the movable clamp and a lower half core arranged in the fixed clamp, the lower half core can vertically slide in the fixed clamp, and the end faces of the connecting positions of the upper half core and the lower half core are comb-tooth-shaped crossed grooves which are mutually crossed. Compared with the prior art, the iron core has the advantages that the cross grooves of the end faces of the upper half core and the lower half core are meshed through the comb-tooth-shaped cross grooves, compared with traditional plane splicing, the contact area is larger, attaching is tighter, air gap magnetic resistance can be greatly reduced, the magnetic leakage phenomenon is restrained, the detection precision is improved, and the problem of measurement errors caused by air gaps is solved.

Description

Technical Field

[0001] This invention relates to an insulating rod rope loop detection clamp and its usage method, belonging to the technical field of current detection equipment. Background Technology

[0002] In the fields of power system operation and maintenance and electrical equipment testing, monitoring the electrical performance of live-line working tools such as insulating rods and ropes is crucial. Clamp-on current testing tools, with their advantage of non-circuit clamping and testing, have become key equipment for ensuring the safety of live-line work. They are mainly used to monitor the leakage current of the object under test in real time, preventing on-site workers from being unaware of potential safety hazards due to substandard insulation caused by weather, equipment aging, or humid conditions.

[0003] Traditional leakage current monitors mostly use a clamp-on ammeter structure, which is a portable tool that can clamp and measure current without disconnecting the circuit. The principle is that there is an openable and closable ring-shaped iron core inside the jaws, and a secondary coil is wound on the iron core. When the jaws are closed, the iron core concentrates the magnetic field lines around the wire into the secondary coil. According to the principle of electromagnetic induction, the secondary coil will induce a current proportional to the current in the wire to obtain the detection result.

[0004] The iron core of existing testing equipment, as the core component of clamp-on testing, is limited by its openable and closable structure. The iron core must be designed as a two-section structure. However, the contact surfaces of the current iron core are mostly simple planar splices. When closed, the separation air gap at the open contact position is a problem that is difficult to completely avoid in the design of current clamps. This will affect the measurement accuracy by increasing magnetic resistance and reducing magnetic flux, affecting the magnetic circuit performance, leading to problems such as increased magnetic resistance and serious magnetic leakage, and decreased testing accuracy. In particular, the iron core end face wears down over long-term use. Currently, the two sections of the iron core in the testing equipment are fixed in two separate separable shells, and it is impossible to tighten and adjust the iron core to compensate for wear problems during subsequent use, causing the equipment error to gradually increase over time.

[0005] In addition, range adjustment is a necessary operation to adapt to different current amplitude detection. When adjusting the range, the iron core must be disconnected to prevent surges or sparks from being generated during the switching process, which could damage the detection element. However, the existing detection device relies entirely on manual operation to open the jaws to disconnect the iron core before adjusting the range. It is easy for personnel to forget to disconnect the jaws due to improper operation, which can cause the secondary coil to continuously induce voltage and damage precision circuits such as amplifiers and ADC modules. Summary of the Invention

[0006] The purpose of this invention is to provide an insulating rod rope loop detection clamp and its usage method. The iron core structure with comb-shaped cross grooves achieves the interlocking of the cross grooves on the end faces of the upper and lower cores. Compared with traditional planar splicing, the contact area is larger and the fit is tighter, which can significantly reduce air gap magnetic resistance, suppress magnetic leakage, improve detection accuracy, and solve the above-mentioned problems in the background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An insulating rod rope loop detection clamp includes a body, a fixed clamp, and a movable clamp. The fixed clamp is located on the top of the body, and the movable clamp is detachably located on the top side of the fixed clamp. The fixed clamp and the movable clamp form a detachable clamp-like cover, and an iron core is provided inside the clamp-like cover. The iron core includes an upper half core fixed inside the movable clamp and a lower half core disposed inside the fixed clamp. The lower half core can slide vertically inside the fixed clamp. The end faces of the upper half core and the lower half core are both comb-shaped cross grooves. The upper half core and the lower half core are connected to each other through the cross grooves. The fixed clamp is provided with a retainer that supports the lower half core and the upper half core to abut against each other through the cross grooves.

[0008] Preferably, a rotating component is provided on one side of the clamp-shaped cover, and a locking pin is provided on the other side corresponding to the rotating component. The movable clamp is opened or locked onto the fixed clamp by rotating upward from one end of the fixed clamp through the rotating component and the locking pin.

[0009] Preferably, the fixing clip includes a front fixing shell and a rear fixing shell symmetrically distributed front and rear. One end of the front fixing shell is provided with a rotating pin tube to support the rotation of the locking pin. One end of the rear fixing shell is provided with a locking groove corresponding to the rotating pin tube. The other ends of both the front fixing shell and the rear fixing shell are provided with rotating bushings to support the rotation of the rotating component.

[0010] Preferably, the movable clamp includes a front movable shell and a rear movable shell symmetrically distributed front and rear. Each of the front and rear movable shells has a rotating lug fixed at one end. A rotating component passes through the rotating bushing and the rotating lug to connect the front fixed shell, the rear fixed shell, the front movable shell, and the rear movable shell together. The other end of the rear movable shell is fixed with a pawl that extends into the locking groove.

[0011] Preferably, the pawl is a C-shaped slot structure with the opening facing downwards, and the locking pin includes a rotating section rotatably disposed in a rotating pin tube. A pin rod is disposed behind the rotating section, which passes through the locking groove and engages with the pawl. The pin rod includes a slot section with flat grooves on both sides. The width of the slot section is smaller than the opening width of the pawl, so that the slot section can rotate to be parallel to the opening of the pawl to unlock the pawl. An eccentric connecting rod is connected at an eccentric point between the rotating section and the slot section. A rotating paddle is fixed at the front end of the rotating section, and a tail cap is fixed at the rear end of the pin rod to prevent the locking pin from falling out of the fixing clamp.

[0012] Preferably, the upper half of the core is externally fixed with an upper retainer installed inside the movable clamp, and the lower half of the core is externally fixed with a lower retainer located inside the fixed clamp. A vertically extending push rod is fixed to the bottom of the lower retainer. The retainer includes a shock-absorbing pad disposed inside the fixed clamp. A vertically extending inner slide cylinder is fixed to the top side of the shock-absorbing pad to accommodate the push rod. A driven slider that slides and seals with the inner slide cylinder is fixed to the bottom end of the push rod.

[0013] Preferably, the bottom outer side of the inner slide cylinder is connected to a balance tube, and the other end of the balance tube is connected to an outer slide cylinder disposed inside the fixing clamp. An active slider is slidably sealed inside the outer slide cylinder, and a slide rod is fixed on the top side of the active slider, extending out of the outer slide cylinder. A support arm is hinged between the outer end of the slide rod and the eccentric connecting rod.

[0014] Preferably, the rotating component includes a shaft fixed between two sets of rotating ears of the movable clamp. A retaining ring that rotates and engages with the rotating bushing is fixed to the outside of the shaft. A coil spring is fixed to the outside of the retaining ring to keep the shaft from driving the movable clamp to press against the end face of the fixed clamp. A steel cable that passes downward into the machine body is wound around the outside of the shaft between the two sets of retaining rings.

[0015] Preferably, the top of the machine body is fixed with a top plate that supports the fixing clamp. The top plate has a through hole for accommodating the steel cable, and a sliding sleeve for guiding the steel cable is fixed in the through hole. The outer side of the machine body is provided with a positioning hole, and an operating part is provided in the positioning hole. The operating part includes a fixing seat fixed inside the machine body. A pressure rod is slidably arranged on the outer side of the fixing seat. A button extending out of the positioning hole is fixed at the end of the pressure rod. A safety plate that can slide downward is provided on the edge of the top plate. A constraint groove extending to the outer side of the pressure rod is provided on the bottom side of the safety plate, and a receiving hole serving as a button locking hole is provided on the top side of the constraint groove. A connection hole for fixing the bottom end of the steel cable is provided on the safety plate above the receiving hole.

[0016] A method for using an insulating rod rope loop detection clip, comprising the following steps: a. When it is necessary to open the clamp-like cover to clamp the outside of the conductor to be tested for current testing, rotate the rotating lever to keep the locking pin rotating as a whole, and rotate the slot section to be parallel to the opening of the claw of the movable clamp. At this time, the locking state of the locking pin on the opening side of the movable clamp is released. Then, pull the movable clamp upward to realize the opening action of the clamp-like cover under the support of the rotating part. b. After placing the conductor to be tested between the movable clamp and the fixed clamp, release the movable clamp so that the spring support shaft can drive the rotating ear and the movable clamp as a whole to reset, thereby maintaining the automatic closing action of the movable clamp. The cross slots of the upper half core and the lower half core interlock with each other to achieve staggered contact at the iron core joint. At this time, the pawl is placed in the locking slot of the fixed clamp. Rotate the locking pin to drive the pawl section to rotate and lock the pawl, completing the locking action of the clamp-shaped cover. c. While rotating the rotary lever to drive the locking pin to rotate and lock the movable clamp, the eccentric connecting rod rotates downward synchronously under the support of the slot section and the rotating section. The eccentric connecting rod drives the support arm to move downward, thereby pushing the active slider downward to compress the space inside the outer slide cylinder, increasing the air pressure inside the balance tube. The pressure is then transmitted to the inner slide cylinder through the balance tube, using the air pressure to push the driven slider and the push rod upward synchronously. The push rod drives the lower clamp to support the lower half core to move upward. That is, while locking the movable clamp, rotating the locking pin synchronously pushes the lower half core upward, increasing the tightness of the cross groove at the iron core interface and reducing the air gap. d. When it is necessary to open the clamp-like cover and separate the iron core to remove the conductor to be tested, rotate the rotating paddle to drive the locking pin to rotate in the opposite direction. At the same time, the slot section releases the locking state of the claw, the eccentric connecting rod pulls the support arm and slide rod to move upward, the pressure inside the outer slide cylinder decreases, and the driven slider pulls the top rod and the lower half core to move downward through the balance tube, so as to actively separate the end intersection section of the upper and lower parts of the iron core before opening the movable clamp. e. When pressing the button on the operating section to control the adjustment of the detection range, first press down the top of the safety plate so that its receiving hole moves down to the position aligned with the button, releasing the safety plate from the button's pressing and locking state. At the same time, the safety plate can pull the steel cable down. Since the top of the steel cable is wound around the outside of the shaft, pressing down the safety plate can pull the shaft support movable clamp upward to rotate and open, ensuring that the iron core can be disconnected while the detection range is adjusted by pressing the button, thus realizing the safety function.

[0017] The beneficial effects of the present invention are: 1. The present invention achieves the interlocking of the end faces of the upper half core and the lower half core by adopting a comb-shaped cross-groove iron core structure. Compared with the traditional planar splicing, the contact area is larger and the fit is tighter, which can significantly reduce the air gap magnetic resistance, suppress the leakage magnetic phenomenon, improve the detection accuracy, and solve the measurement error problem caused by the air gap. 2. Through the transmission structure of the cage and locking pin with eccentric connecting rod, when locking the movable clamp, the lower half core can be pushed upward simultaneously to actively compress the gap at the iron core joint. Even if the iron core end face undergoes slight deformation due to wear during long-term use, it can still achieve pressure compensation by relying on the pneumatic power mechanical support of the driven slider and push rod. This can maintain the tight engagement at the cross slot, ensure that the equipment error does not accumulate with the use time, and extend the high-precision service life of the equipment. 3. The coil spring and shaft, as rotating components, work in conjunction with the locking structure of the slot section and the jaws to achieve automatic closing action after the movable clamp is opened. The coil spring supports the movable clamp to close and reset, ensuring fast and stable connection of the iron core. In addition, the locking mechanism of the slot section and the jaws, combined with the locking pin, improves the resistance to vibration and impact, solves the problem of easy loosening of traditional buckles, ensures the continuity of testing in complex working environments, and reduces the testing failure caused by accidental disconnection of equipment. 4. When opening the jaws, rotating the locking pin can simultaneously trigger the lower half of the core to move downward, thus separating the iron core first. There is no need to manually adjust the position of the iron core, avoiding the problem of sticking and difficult separation at the intersection of the iron cores in humid environments, and improving the operational safety in live working scenarios. 5. The safety mechanism, which uses a safety clip to pull the steel cable and works in conjunction with the operating unit, ensures that before pressing the range adjustment button, the safety clip must be pressed to move the cable downwards, forcibly pulling the steel cable to open the jaws and disconnect the iron core. This structure fundamentally eliminates the problem of misoperation when adjusting the detection range without disconnecting the iron core, ensuring that there is no induced voltage in the secondary coil when switching ranges, avoiding damage to the precision circuit from surges and sparks, and guaranteeing the service life and detection accuracy stability of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a partial structural breakdown diagram of the present invention; Figure 4 This is a schematic diagram of the internal structure of the present invention; Figure 5 This is a schematic diagram showing the disassembled structure of the body, fixing clamp, and iron core of the present invention; Figure 6 This is a front view of the internal structure of the present invention; Figure 7 This is a schematic diagram showing the overall structure of the present invention broken down; Figure 8 This is a structural disassembly diagram of the fixing clip of the present invention; Figure 9 This is a structural breakdown diagram of the movable clip of the present invention; Figure 10 This is a structural disassembly diagram of the iron core of the present invention; Figure 11 This is a structural breakdown diagram of the locking pin of the present invention; Figure 12 This is a three-dimensional structural schematic diagram of the rotating component of the present invention; Figure 13 This is a structural breakdown diagram of the body of the present invention; Figure 14This is a structurally disassembled schematic diagram of the operating part and the safety plate of the present invention; Figure 15 This is a three-dimensional structural diagram of the present invention in the open state; Figure 16 This is a three-dimensional structural diagram of the invention in the open state from another direction.

[0020] The annotations in the attached figures are explained as follows: 1. Body; 101. Top plate; 102. Positioning hole; 103. Through-tube hole; 2. Fixing clamp; 201. Front fixed shell; 202. Rear fixed shell; 203. Rotating pin tube; 204. Locking groove; 205. Rotating bushing; 3. Movable clamp; 301. Front movable shell; 302. Rear movable shell; 303. Rotating ear; 304. Claw; 4. Iron core; 401. Upper half core; 402. Lower half core; 403. Cross groove; 404. Upper bracket; 405. Lower bracket; 406. Push rod; 407. Driven slider; 5. Locking pin; 501. Pin rod; 502. Slot 503. Rotating section; 504. Rotating lever; 505. Eccentric connecting rod; 506. Tail end cover; 6. Rotating component; 601. Shaft; 602. Retaining ring; 603. Coil spring; 604. Steel cable; 7. Operating part; 701. Fixed seat; 702. Pressure rod; 703. Button; 8. Safety plate; 801. Receiving hole; 802. Constraint groove; 803. Connecting hole; 9. Cage; 901. Shock-absorbing pad; 902. Inner slide cylinder; 903. Balance tube; 904. Outer slide cylinder; 905. Active slider; 906. Slide rod; 907. Support arm; 10. Sliding sleeve tube. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] See Figures 1-16 As shown, the present invention provides an insulating rod rope loop detection clamp, including a body 1, a fixed clamp 2 and a movable clamp 3. The fixed clamp 2 is disposed on the top of the body 1, and the movable clamp 3 is openably disposed on the top side of the fixed clamp 2. The fixed clamp 2 and the movable clamp 3 form a detachable clamp-like cover. An iron core 4 is disposed inside the clamp-like cover. The iron core 4 is used to concentrate the magnetic field lines around the conductor to be tested. Based on the principle of electromagnetic induction, the conductor current is converted into an electrical signal of the secondary coil to realize the detection of parameters such as leakage current. The iron core 4 includes an upper half core 401 fixed inside the movable clamp 3 and a lower half core 402 disposed inside the fixed clamp 2. The lower half core 402 can slide vertically inside the fixed clamp 2. The end faces of the upper half core 401 and the lower half core 402 are both comb-shaped cross grooves 403 that can intersect each other, which are used to increase the contact area of ​​the mating surface of the iron core 4. The air gap is reduced by the comb-shaped interlocking structure, thereby improving the integrity of the magnetic circuit and the detection accuracy. The fixed clamp 2 is provided with a retainer 9 that supports the lower half core 402 and the upper half core 401 to abut against each other through the cross grooves 403.

[0023] As an optional implementation, a rotating member 6 is provided on one side of the clamp-shaped cover to support the movable clamp 3 to rotate upward and open from one end of the fixed clamp 2, and a locking pin 5 is provided on the other side of the clamp-shaped cover corresponding to the rotating member 6 to keep the opening of the movable clamp 3 locked on the fixed clamp 2. With this configuration, the rotating member 6 provides rotational support for the opening of the movable clamp 3, and the locking pin 5 locks the movable clamp 3 after it is closed, ensuring the stability and reliability of the opening and closing operation of the clamp-shaped cover, and facilitating the quick clamping of the object to be tested and locking of the detection state. The fixing clip 2 includes a front fixing shell 201 and a rear fixing shell 202 symmetrically distributed. One end of the front fixing shell 201 is provided with a rotating pin tube 203 to support the rotation of the pin shaft. One end of the rear fixing shell 202 is provided with a locking groove 204 corresponding to the rotating pin tube 203. The other ends of both the front fixing shell 201 and the rear fixing shell 202 are provided with rotating bushings 205 to support the rotation of the rotating component 6. With this configuration, the symmetrical structure of the front fixing shell 201 and the rear fixing shell 202 provides installation support for the rotating component 6 and the locking pin 5, ensuring the stability and coaxiality of the assembly of each component. The rotating bushing 205 provides a rotation reference for the rotating component 6, and the rotating pin tube 203 provides installation space for the rotation of the locking pin 5. The movable clamp 3 includes a front movable shell 301 and a rear movable shell 302 symmetrically distributed front and rear. One end of the front movable shell 301 and the rear movable shell 302 is fixed with a rotating ear 303 for connecting to the rotating component 6, which is used to connect with the shaft 601 and other components of the rotating component 6, transmit the driving force of the rotating component 6, and realize the upward rotation and opening action of the movable clamp 3. The other end of the rear movable shell 302 is fixed with a claw 304 that extends into the locking groove 204. With this configuration, the claw 304 extends into the locking groove 204 and cooperates with the slot section 502 of the locking pin 5 to realize the locking connection between the movable clamp 3 and the fixed clamp 2, ensuring the structural stability of the clamp-like cover after it is closed. The pawl 304 has a downward-facing C-shaped slot structure. The locking pin 5 includes a rotating section 503 rotatably disposed in the rotating pin tube 203. Behind the rotating section 503 is a pin 501 that passes into the locking groove 204 and engages with the pawl 304. Both sides of the pin 501 are flat groove-shaped slot sections 502. The width of the slot section 502 is smaller than the opening width of the pawl 304, so that the slot section 502 can be rotated to be parallel to the opening of the pawl 304 to unlock the pawl 304. In this way, by rotating the locking pin 5, the angle between the slot section 502 and the opening of the pawl 304 can be changed to unlock the pawl. The locking and unlocking of 304 is convenient and reliable. An eccentric connecting rod 505 is connected eccentrically between the rotating section 503 and the slot section 502. A rotating paddle 504 is fixed at the front end of the rotating section 503, and a tail cover 506 is fixed at the rear end of the slot section 502 to prevent the locking pin 5 from falling out of the fixing clamp 2. With this configuration, the rotating paddle 504 makes it easy for the operator to manually rotate the locking pin 5, and the eccentric connecting rod 505 can convert the rotation of the locking pin 5 into the linkage action of the subsequent retainer 9 components. The tail cover 506 prevents the locking pin 5 from falling out of the fixing clamp 2, ensuring the structural integrity and functional stability of the locking pin 5. The upper half core 401 is externally fixed with an upper retainer 404 installed inside the movable clamp 3, and the lower half core 402 is externally fixed with a lower retainer 405 located inside the fixed clamp 2. A vertically extending top rod 406 is fixed to the bottom of the lower retainer 405. The retainer 9 includes a shock-absorbing pad 901 disposed inside the fixed clamp 2. The shock-absorbing pad 901 is made of elastic rubber or silicone and other materials with buffering and shock-absorbing properties, used to absorb the impact force generated by equipment operation or external vibration, and to prevent the vibration from being transmitted to the iron core 4 and affecting the detection accuracy. The damping pad 901 provides a stable mounting base for the inner slide cylinder 902. The top side of the damping pad 901 is fixed with a vertically extending inner slide cylinder 902 that accommodates the insertion of the top rod 406. The bottom end of the top rod 406 is fixed with a driven slider 407 that slides and seals with the inner slide cylinder 902. When the top rod 406 moves vertically, the driven slider 407 and the inner slide cylinder 902 cooperate to form a sealed space. The lower half core 402 can be supported and its position adjusted using air pressure or hydraulic principle, ensuring the stability of the docking pressure of the iron core 4. The bottom outer side of the inner slide cylinder 902 is connected to a balance tube 903. The other end of the balance tube 903 is connected to an outer slide cylinder 904 located inside the fixed clamp 2. An active slider 905 is slidably sealed inside the outer slide cylinder 904. A slide rod 906 that passes through the outer slide cylinder 904 is fixed on the top side of the active slider 905. A support arm 907 is hinged between the outer end of the slide rod 906 and the eccentric connecting rod 505. This arm is used to convert the rotation of the locking pin 5 into the vertical movement of the active slider 905 through the eccentric connecting rod 505 and the support arm 907. The pressure is then transmitted through the balance tube 903 to achieve the linkage push of the retainer 9 on the lower half core 402. This optimizes the tightness of the iron core 4 docking when locking the movable clamp 3. The rotating component 6 includes a shaft 601 fixed between two sets of rotating ears 303 of the movable clamp 3. A retaining ring 602 that rotates and engages with the rotating bushing 205 is fixed to the outside of the shaft 601. A coil spring 603 is fixed to the outside of the retaining ring 602 to keep the shaft 601 driving the movable clamp 3 to press against the end face of the fixed clamp 2. The coil spring 603 provides elastic restoring force and releases elastic potential energy after the movable clamp 3 is opened, causing the movable clamp 3 to automatically press against the end face of the fixed clamp 2 to close, ensuring that the iron core 4 is quickly and stably connected. A steel cable 604 is wound around the outside of the shaft 601 between the two sets of retaining rings 602 and passes downward into the machine body 1 to transmit the driving force of the operating part 7, so as to realize the opening action of the movable clamp 3 controlled by the operating part 7, providing a basis for safe operation of range adjustment and other operations.

[0024] A top plate 101 supporting the fixing clamp 2 is fixed on the top of the machine body 1. A through hole 103 for accommodating the steel cable 604 is passed through the top plate 101. A sliding sleeve 10 is fixed inside the through hole 103 to guide the steel cable 604 into the machine body 1, providing a channel for the steel cable 604 to pass through. The sliding sleeve 10 guides and protects the steel cable 604, preventing direct friction between the steel cable 604 and the through hole 103, which could cause damage. A positioning hole 102 is provided on the outer side of the machine body 1. An operating part 7 is provided inside the positioning hole 102. The operating part 7 includes a fixing seat 701 fixed inside the machine body 1. A pressure rod 702 is slidably mounted on the outer side of the fixing seat 701. A button 703 extending out of the positioning hole 102 is fixed to the end of the pressure rod 702. The button 703 is used by the operator to trigger functions such as range adjustment in the operating part 7. Pressing the button causes the pressure rod 702 to slide, transmitting operating commands. A sliding safety plate 8 is provided along the edge of the 01. A constraint groove 802 extending to the outside of the pressure rod 702 is provided on the bottom side of the safety plate 8. A receiving hole 801 serving as a locking hole for the button 703 is provided on the top side of the constraint groove 802. When the safety plate 8 is not sliding down, the constraint groove 802 restricts the lateral sliding of the pressure rod 702. The receiving hole 801 is misaligned with the button 703 to achieve lateral locking of the button 703 and prevent accidental activation. After the safety plate 8 slides down, the receiving hole 801 aligns with the button 703, releasing the lock on the pressure rod 702 and the button 703 and ensuring operational safety. A connecting hole 803 for fixing the bottom end of the steel cable 604 is passed through the safety plate 8 above the receiving hole 801, thereby connecting the safety plate 8 and the steel cable 604. When the safety plate 8 slides, it pulls the steel cable 604, triggering the synchronous action of opening the movable clamp 3, ensuring that the iron core 4 is disconnected before operations such as range adjustment, thus meeting the requirements for safe operation.

[0025] A method for using an insulating rod rope loop detection clip includes the following steps: a. When it is necessary to open the clamp-like cover to clamp the outside of the conductor to be tested for current testing, rotate the rotating lever 504 to keep the locking pin 5 rotating as a whole, and rotate the slot section 502 to be parallel to the opening of the claw 304 of the movable clamp 3. At this time, the locking state of the locking pin 5 on the opening side of the movable clamp 3 is released. Then, the movable clamp 3 is pulled upward to realize the opening action of the clamp-like cover under the support of the rotating part 6. b. After placing the conductor to be tested between the movable clamp 3 and the fixed clamp 2, release the movable clamp 3 so that the spring 603 supports the shaft 601 to drive the rotating ear 303 and the movable clamp 3 to reset as a whole, thereby maintaining the automatic closing action of the movable clamp 3. The cross grooves 403 of the upper half core 401 and the lower half core 402 engage with each other to achieve staggered contact at the joint of the iron core 4. At this time, the claw 304 is placed in the locking groove 204 of the fixed clamp 2. Rotate the locking pin 5 to drive the slot section 502 to rotate and lock the claw 304, thus completing the locking action of the clamp-like cover. c. While rotating the rotary paddle 504 to drive the locking pin 5 to rotate and lock the movable clamp 3, the eccentric connecting rod 505 rotates downward synchronously under the support of the slot section 502 and the rotating section 503. The eccentric connecting rod 505 drives the support arm 907 to support the slide rod 906 to move downward, thereby pushing the active slider 905 downward to compress the space inside the outer slide cylinder 904, thereby increasing the air pressure inside the balance tube 903. The pressure is then transmitted to the inner slide cylinder 902 through the balance tube 903, so that the air pressure can be used to push the driven slider 407 and the push rod 406 upward synchronously. The push rod 406 drives the lower card seat 405 to support the lower half core 402 to move upward. That is, while locking the movable clamp 3, the locking pin 5 is rotated to press the lower half core 402 upward synchronously, increasing the tightness of the cross groove 403 at the interface of the iron core 4 and reducing the air gap. d. When it is necessary to open the clamp-like cover and separate the iron core 4 to take out the conductor to be tested, rotate the rotating paddle 504 to drive the locking pin 5 to rotate in the opposite direction and reset. At the same time, the slot section 502 releases the locking state of the claw 304, and the eccentric connecting rod 505 pulls the support arm 907 and the slide rod 906 to move upward. The internal pressure of the outer slide cylinder 904 decreases, and the driven slider 407 pulls the top rod 406 and the lower half core 402 to move downward through the balance tube 903, so as to actively separate the end intersection section of the upper and lower parts of the iron core 4 before opening the movable clamp 3. e. When pressing button 703 on the operation unit 7 to control the adjustment of the detection range, first press down the top of the safety plate 8 so that its receiving hole 801 moves down to the position aligned with button 703, releasing the locking state of the safety plate 8 on button 703. At the same time, the safety plate 8 can pull the steel cable 604 down. Since the top of the steel cable 604 is wound around the outside of the shaft 601, the shaft 601 can be pulled upward to support the movable clamp 3 while pressing down the safety plate 8, so as to ensure that the iron core 4 can be disconnected while the detection range is adjusted by pressing button 703, thus realizing the safety function.

[0026] By adopting a core 4 structure with comb-shaped cross grooves 403, the upper half core 401 and the lower half core 402 end face cross grooves 403 are engaged. Compared with traditional planar splicing, the contact area is larger and the fit is tighter, which can significantly reduce air gap magnetic resistance, suppress magnetic leakage, improve detection accuracy, and solve the measurement error problem caused by air gap.

[0027] Through the transmission structure of the retainer 9 and the locking pin 5 in conjunction with the eccentric connecting rod 505, when locking the movable clamp 3, the lower half core 402 can be pushed upward simultaneously to actively compress the gap at the joint of the iron core 4. Even if the end face of the iron core 4 undergoes slight deformation due to wear during long-term use, it can still achieve pressure compensation by relying on the pneumatic power mechanical support of the driven slider 407 and the push rod 406. This can maintain the tight engagement at the cross groove 403, ensuring that the equipment error does not accumulate with the use time and extending the high-precision service life of the equipment.

[0028] The coil spring 603 and shaft 601, as rotating parts 6, work together with the locking structure of the slot section 502 and the claw 304 to achieve the automatic closing action after the movable clamp 3 is opened. The coil spring 603 supports the movable clamp 3 to close and reset, ensuring that the iron core 4 is quickly and stably connected. In addition, the locking mechanism of the slot section 502 and the claw 304 of the locking pin 5 improves the vibration and impact resistance, solves the problem of easy loosening of traditional buckles, ensures the continuity of detection in complex working environments, and reduces the detection failure problem caused by accidental disconnection of equipment.

[0029] When the jaws are opened, rotating the locking pin 5 can simultaneously trigger the lower half core 402 to move downward, so that the iron core 4 is separated downward first. There is no need to manually adjust the position of the iron core 4, avoiding the problem of stickiness and difficulty in separation at the intersection of the iron core 4 in humid environments, thus improving the operational safety in live working scenarios.

[0030] By using the safety pin 8 to pull the steel cable 604, and in conjunction with the operating unit 7 as a safety structure, before pressing the range adjustment button 703, the safety pin 8 must first be pressed to move it down, forcibly pulling the steel cable 604 to open the jaws and disconnect the iron core 4. This structure fundamentally eliminates the problem of erroneous operation when adjusting the detection range without disconnecting the iron core 4, ensuring that there is no induced voltage in the secondary coil when switching the range, avoiding surges and sparks that could damage the precision circuit, and ensuring the service life and detection accuracy stability of the equipment.

[0031] 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 variations or substitutions that can be easily conceived by those 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 determined by the scope of the claims.

Claims

1. An insulating rod rope loop detection clamp, characterized in that: It includes a body (1), a fixed clamp (2) and a movable clamp (3). The fixed clamp (2) is located on the top of the body (1), and the movable clamp (3) is openable and located on the top side of the fixed clamp (2). The fixed clamp (2) and the movable clamp (3) form a detachable clamp-like cover. An iron core (4) is provided inside the clamp-like cover. The iron core (4) includes an upper half core (401) fixed inside the movable clamp (3) and a lower half core (402) disposed inside the fixed clamp (2). The lower half core (402) can slide vertically inside the fixed clamp (2). The end faces of the upper half core (401) and the lower half core (402) are comb-shaped cross grooves (403). The upper half core (401) and the lower half core (402) are connected to each other through the cross grooves (403). The fixed clamp (2) is provided with a retainer (9) that supports the lower half core (402) and the upper half core (401) to abut against the cross grooves (403).

2. The insulating rod rope loop detection clamp according to claim 1, characterized in that: The clamp-shaped cover has a rotating part (6) on one side and a locking pin (5) on the other side corresponding to the rotating part (6). The movable clamp (3) is opened or locked on the fixed clamp (2) by rotating upward from one end of the fixed clamp (2) through the rotating part (6) and the locking pin (5).

3. The insulating rod rope loop detection clamp according to claim 2, characterized in that: The fixing clip (2) includes a front fixing shell (201) and a rear fixing shell (202) symmetrically distributed. One end of the front fixing shell (201) is provided with a rotating pin tube (203) to support the rotation of the locking pin. One end of the rear fixing shell (202) is provided with a locking groove (204) corresponding to the rotating pin tube (203). The other ends of the front fixing shell (201) and the rear fixing shell (202) are both provided with rotating bushings (205) to support the rotation of the rotating component (6).

4. The insulating rod rope loop detection clamp according to claim 3, characterized in that: The movable clamp (3) includes a front movable shell (301) and a rear movable shell (302) symmetrically distributed front and rear. One end of the front movable shell (301) and the rear movable shell (302) is fixed with a rotating ear (303). The rotating component (6) passes through the rotating bushing (205) and the rotating ear (303) to connect the front fixed shell (201), the rear fixed shell (202), the front movable shell (301) and the rear movable shell (302) together. The other end of the rear movable shell (302) is fixed with a claw (304) that extends into the locking groove (204).

5. The insulating rod rope loop detection clamp according to claim 4, characterized in that: The pawl (304) has a downward-facing C-shaped slot structure. The locking pin (5) includes a rotating section (503) rotatably disposed in a rotating pin tube (203). Behind the rotating section (503) is a pin (501) that passes into the locking groove (204) and engages with the pawl (304). The pin (501) includes a slot section (502) with flat grooves on both sides. The width of the slot section (502) is smaller than that of the pawl (304). The opening width of 04) is used to rotate the slot section (502) to be parallel to the opening of the claw (304) to unlock the claw (304). An eccentric connecting rod (505) is connected between the rotating section (503) and the slot section (502). A rotating paddle (504) is fixed at the front end of the rotating section (503). A blocking locking pin (5) is fixed at the rear end of the pin (501) to disengage from the tail end cap (506) of the fixing clamp (2).

6. The insulating rod rope loop detection clamp according to claim 5, characterized in that: The upper half core (401) is fixed with an upper bracket (404) installed inside the movable clamp (3), and the lower half core (402) is fixed with a lower bracket (405) located inside the fixed clamp (2). The bottom of the lower bracket (405) is fixed with a vertically extending top rod (406). The retainer (9) includes a shock-absorbing pad (901) disposed inside the fixed clamp (2). The top side of the shock-absorbing pad (901) is fixed with a vertically extending inner slide cylinder (902) that accommodates the top rod (406). The bottom end of the top rod (406) is fixed with a driven slider (407) that slides and seals with the inner slide cylinder (902).

7. The insulating rod rope loop detection clamp according to claim 6, characterized in that: The inner slide tube (902) is connected to a balance tube (903) on the outer side of its bottom end. The other end of the balance tube (903) is connected to an outer slide tube (904) located inside the fixing clamp (2). An active slider (905) is provided inside the outer slide tube (904) in a sliding seal. A slide rod (906) that passes through the outer slide tube (904) is fixed on the top side of the active slider (905). A support arm (907) is hinged between the outer end of the slide rod (906) and the eccentric connecting rod (505).

8. The insulating rod rope loop detection clamp according to claim 7, characterized in that: The rotating component (6) includes a shaft (601) fixed between two sets of rotating ears (303) of the movable clamp (3). A retaining ring (602) that rotates and engages with a rotating bushing (205) is fixed to the outside of the shaft (601). A coil spring (603) is fixed to the outside of the retaining ring (602) to keep the shaft (601) from driving the movable clamp (3) to press against the end face of the fixed clamp (2). A steel cable (604) that goes downward into the machine body (1) is wound around the outside of the shaft (601) between the two sets of retaining rings (602).

9. The insulating rod rope loop detection clamp according to claim 8, characterized in that: The top of the body (1) is fixed with a top plate (101) supporting the fixing clamp (2). The top plate (101) is provided with a tube hole (103) for accommodating the steel cable (604) to pass through, and a sliding sleeve (10) for guiding the steel cable (604) to extend into the tube hole (103) is fixed inside the tube hole (103). The outer side of the body (1) is provided with a positioning hole (102), and an operating part (7) is provided inside the positioning hole (102). The operating part (7) includes a fixing seat (701) fixed inside the body (1), and a sliding part is provided on the outer side of the fixing seat (701). A pressure bar (702) has a button (703) fixed at its end that extends out of a positioning hole (102). A safety plate (8) that can slide downwards is provided on the edge of the top plate (101). A constraint groove (802) extending to the outside of the pressure bar (702) is provided on the bottom side of the safety plate (8), and a receiving hole (801) serving as a locking hole for the button (703) is provided on the top side of the constraint groove (802). A connecting hole (803) for fixing the bottom end of a steel cable (604) is provided on the safety plate (8) above the receiving hole (801).

10. A method of using an insulating rod rope loop detection clip, comprising the insulating rod rope loop detection clip as described in any one of claims 1-9, characterized in that... Includes the following steps: a. When it is necessary to open the clamp-like cover to clamp the outside of the conductor to be tested for current testing, rotate the rotating lever (504) to keep the locking pin (5) rotating as a whole, and rotate the slot section (502) to be parallel to the opening of the claw (304) of the movable clamp (3). At this time, the locking state of the locking pin (5) on the opening side of the movable clamp (3) is released, and then the movable clamp (3) is pulled upward to realize the opening action of the clamp-like cover under the support of the rotating part (6). b. After placing the conductor to be tested between the movable clamp (3) and the fixed clamp (2), release the movable clamp (3) so that the spring (603) supports the shaft (601) to drive the rotating ear (303) and the movable clamp (3) to reset as a whole, thereby maintaining the automatic closing action of the movable clamp (3). The cross grooves (403) of the upper half core (401) and the lower half core (402) mesh with each other to achieve the staggered contact at the joint of the iron core (4). At this time, the claw (304) is placed in the locking groove (204) of the fixed clamp (2). Rotate the locking pin (5) to drive the slot section (502) to rotate and lock the claw (304), thus completing the locking action of the clamp-shaped cover. c. While rotating the rotary lever (504) drives the locking pin (5) to rotate and lock the movable clamp (3), the eccentric connecting rod (505) rotates downward synchronously under the support of the slot section (502) and the rotating section (503). Through the eccentric connecting rod (505), the support arm (907) drives the sliding rod (906) to move downward, thereby pushing the active slider (905) downward to compress the space inside the outer slide cylinder (904) to increase the air pressure inside the balance tube (903). Pressure is transmitted to the inner slide cylinder (902) through the balance tube (903) so that the driven slider (407) and the push rod (406) are pushed upward synchronously by the air pressure. The push rod (406) drives the lower card seat (405) to support the lower half core (402) to move upward. That is, while locking the movable clamp (3), the lower half core (402) is pushed upward synchronously by rotating the locking pin (5), which increases the tightness of the cross groove (403) at the interface of the iron core (4) and reduces the air gap. d. When it is necessary to open the clamp-like cover and separate the iron core (4) to take out the conductor to be tested, rotate the rotating paddle (504) to drive the locking pin (5) to rotate in the opposite direction. At the same time, the slot section (502) releases the locking state of the claw (304), the eccentric connecting rod (505) pulls the support arm (907) and slide rod (906) to move upward, the pressure inside the outer slide cylinder (904) drops, and the driven slider (407) is pulled by the balance tube (903) to move the top rod (406) and lower half core (402) downward, so as to actively separate the end intersection section of the upper and lower parts of the iron core (4) before opening the movable clamp (3); e. When pressing the button (703) on the operation unit (7) to control the adjustment of the detection range, first press down the top of the safety plate (8) so that its receiving hole (801) moves down to the position aligned with the button (703), releasing the locking state of the safety plate (8) on the button (703). At the same time, the safety plate (8) can pull the steel cable (604) down. Since the top of the steel cable (604) is wound around the outside of the shaft (601), the shaft (601) can be pulled up to support the movable clamp (3) to rotate and open while the safety plate (8) is pressed down, so as to ensure that the iron core (4) can be disconnected while the button (703) is pressed to adjust the detection range, thus realizing the safety function.

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