Energy-saving joint power fitting

Abstract

The present application relates to the technical field of electric power fittings, and discloses an energy-saving jointing electric power fitting, which comprises a jointing pipe part, a split wire clamp part, a ratchet locking mechanism, a pre-tightening thrust assembly and an elastic conductive contact assembly. The one-way meshing and cooperation of the ratchet unit and the ratchet sleeve pipe constructs a rigid locking mechanism that only advances but does not retreat, allows the split wire clamp part to feed in the direction of the pipe opening to continuously tighten the wire, completely prevents the split wire clamp part from slipping backward in the middle of the pipe body, and directly offsets the backward trend of the wire clamp when the line is subjected to wind vibration, dance alternating load; the pre-tightening thrust assembly provides continuous forward axial pre-tightening force through the thrust disc spring, when the aluminum strand creep and diameter reduction occur during long-term operation of the wire, the thrust disc spring automatically releases the stroke and pushes the split wire clamp part to feed forward synchronously, thereby automatically compensating the clamping gap generated by the creep.

Description

Technical Field

[0001] This invention relates to the field of power fittings technology, specifically to an energy-saving power connection fitting. Background Technology

[0002] Splicing tubes are core electrical fittings used in overhead transmission lines to achieve mechanical connection and electrical conduction between two conductors. They are also typical energy-saving electrical fittings currently used to ensure low-loss operation of lines. Their connection conductivity and mechanical gripping stability directly determine the power loss level and operational safety and reliability of the line. Currently, the splicing tubes used in the industry are mainly divided into two types: hydraulic crimping type and wedge self-locking type. Although both have basic energy-saving conduction functions, they still have unavoidable technical defects in practical applications: Hydraulic crimping splices require specialized hydraulic tools for high-altitude operations, which involve complex procedures, long operation times, and high labor intensity for construction workers. Furthermore, the crimping quality is significantly affected by the operator's skill level, and problems such as incomplete crimping and excessive local stress damaging the conductors are prone to occur. This results in high contact resistance and increased losses at the splice, making it extremely unsuitable for emergency repair scenarios and difficult to guarantee stable energy-saving effects.

[0003] Existing wedge-shaped pressure-free splicing pipes, as energy-saving power splicing fittings, rely on the conical wedge tightening principle to achieve self-locking. Although they do not require hydraulic tools and improve installation convenience, their inherent shortcomings limit further improvements in energy saving and reliability: First, electrical conduction relies solely on the contact between the inner wall of the clamp and the outer strands of the conductor, resulting in a limited contact area. Furthermore, the oxide layer on the conductor surface easily leads to high contact resistance, resulting in high heat generation and high power loss at the splice, failing to fully realize the energy-saving effect of the fittings. Second, relying solely on the static friction of the conical surface for anti-loosening is problematic when the line is exposed to light winds for extended periods. Under the action of vibration and galloping alternating loads, the clamp is prone to slipping backward towards the middle of the tube, resulting in a continuous decrease in gripping force, loosening of the connection, and further increase in contact resistance. This poses both a safety hazard of wire breakage and a continuous increase in line loss. The lack of a rigid locking structure to restrain the backward slipping trend of the clamp is a problem. Furthermore, the absence of an active compensation structure means that after long-term operation, the aluminum strands undergo creep and thermal expansion and contraction, increasing the clamping gap. The forward wedging stroke of the clamp is insufficient, and the contact pressure continues to decrease, further exacerbating the increase in contact resistance and the problem of overheating. As a result, the energy-saving performance continues to decline with the years of operation.

[0004] Therefore, structural optimization of existing energy-saving power connection fittings is urgently needed, requiring a power connection fitting that combines rapid installation, rigid anti-loosening, creep adaptive compensation, and low-loss stable conduction. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving power connection fitting to solve the problems mentioned in the background art, such as low installation efficiency, poor anti-loosening performance, no creep compensation, high contact resistance, and large operating losses of existing energy-saving power connection fittings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving power connection fitting, including a connection tube, and further including a split wire clamp, a pawl locking mechanism, a pre-tightening thrust assembly, and an elastic conductive contact assembly; The inside of the connecting tube section is provided with a ratchet sleeve; The split wire clamp, pawl locking mechanism, pre-tightening thrust assembly and elastic conductive contact assembly are each provided in two sets, and are respectively provided on both sides inside the connecting tube. The split wire clamp includes a wire clamp end ring seat and multiple circumferential split clamp bodies. The split clamp bodies are hinged to the wire clamp end ring seat to form a clamping channel, which is adapted to the conical surface of the connecting tube. When moving axially, radial contraction and expansion can be realized simultaneously. The ratchet locking mechanism is connected and installed at one end of the split line clamp, and cooperates with the ratchet sleeve provided in the connecting tube to lock the split line clamp. The pre-tightening thrust assembly is used to provide axial pre-tightening thrust to the split wire clamp; The two sets of elastic conductive contact components are respectively disposed on both sides of the connecting tube section, and are used to abut against the end face of the wire to achieve conductivity.

[0007] As a preferred embodiment of the energy-saving power connection fitting of the present invention, the connection tube includes a connection tube body, a central partition block, a ratchet sleeve and two guide bell mouths; The main body of the connecting tube is a hollow tubular structure with symmetrical ends, including a middle circular tube section and two conical tube ends. The two conical tube ends are integrally connected to the two ends of the middle circular tube section. The diameter of the conical tube ends gradually decreases from the inside to the outside, forming a conical inner cavity that is narrow on the outside and wide on the inside. The central dividing block is coaxially fixed in the middle of the inner cavity of the connecting tube body, dividing the internal cavity of the connecting tube body into two independent cavities on the left and right. The ratchet sleeve is coaxially fixed to the inner wall of the connecting tube body. The inner wall of the ratchet sleeve is provided with a one-way ratchet structure, which is used to cooperate with the pawl locking mechanism to form a one-way locking engagement. Two guide bell mouths are coaxially fixed at both ends of the connector tube body. The outer end is a flared bell-shaped structure, and the inner diameter gradually narrows from the outside to the inside, which is used to guide the wire to be inserted into the connector tube body.

[0008] As a preferred embodiment of the energy-saving power connection fitting of the present invention, the wire clamp end ring seat is a coaxially arranged annular base, and a plurality of wire clamp mounting grooves for connecting the segmented clamp body are provided on the outer end face along the circumference, and each wire clamp mounting groove is provided with a shaft post mounting hole.

[0009] As a preferred embodiment of the energy-saving power connection fitting of the present invention, the segmented clamp body includes clamping arms, protruding clamping teeth, guide roller seats, connecting shafts, and clamping segment reset torsion springs. The inner end of the clamping arm is hinged to the shaft post mounting hole opened in the corresponding wire clamp mounting groove through the connecting shaft. Multiple clamping arms surround to form a clamping channel. The protruding clamping teeth are set on the inner wall surface of the clamping arm to bite the outer strand of the conductor to improve the clamping grip. The guide roller seat is installed on the outer wall surface of the clamping arm. The roller body of the guide roller seat can form rolling contact with the inner wall of the tapered tube end to reduce axial sliding resistance. The connecting shaft is fitted with the clamping resetting torsion spring, and the two ends of the clamping resetting torsion spring abut against the inner wall of the clamping arm and the shaft mounting hole, respectively, to drive each segment clamping body to maintain a radially open state when there is no external force constraint, so as to facilitate the insertion of wires.

[0010] As a preferred embodiment of the energy-saving power connection fitting of the present invention, the pawl locking mechanism includes a pawl mounting ring seat, a reinforced internal thread seat, a trigger linkage component, and a plurality of pawl units evenly arranged circumferentially. The pawl mounting ring seat is a coaxially arranged annular base, which is fixedly connected to the inner ring of the clamp end ring seat. A plurality of reinforced internal thread seats are fixedly provided on the outer wall of the pawl mounting ring seat circumferentially. The pawl mounting ring seat has an insertion interface.

[0011] In a preferred embodiment of the energy-saving power connection fitting of the present invention, the trigger linkage assembly includes a trigger push rod, a push ring, and a push rod return spring. The trigger push rod slides axially through the insertion interface of the pawl mounting ring seat. The push ring is fixedly connected to one end of the trigger push rod. The push rod return spring is sleeved on the outside of the trigger push rod, with its two ends abutting against the end face of the pawl mounting ring seat and the end face of the push ring, respectively, to drive the trigger push rod to maintain its initial state of extending forward out of the insertion interface.

[0012] As a preferred embodiment of the energy-saving power connection fitting of the present invention, each pawl unit includes a pawl housing, a locking pawl block, a cover, a guide post, a pawl return spring, and a stop head. The pawl housing is fixedly installed on the side of the clamp end ring seat. The locking pawl block is slidably assembled in the inner cavity of the pawl housing. The outer end of the locking pawl block extends out of the pawl housing, and its end is unidirectionally adapted to the inner tooth groove of the ratchet sleeve. The guide post is fixedly connected to the inner end of the locking pawl block. The cover is fitted onto the pawl housing. The guide post slides through the lower end of the pawl housing. The stop head is fixed to the lower end of the guide post. The pawl return spring is sleeved on the outside of the guide post, with its two ends abutting against the lower end of the pawl housing and the stop head, respectively, to drive the locking pawl block to maintain its outwardly extended state. The inner side of the locking pawl block has a driven engagement slope for forming a slope transmission engagement with the trigger push rod.

[0013] As a preferred embodiment of the energy-saving power connection fitting of the present invention, the pre-tightening thrust assembly includes a spring end seat and a thrust disc spring. The spring end seat is connected to the reinforced internal thread seat by a screw, and its inner end face has an annular spring limiting groove for coaxially embedding and positioning the outer end of the thrust disc spring. The thrust disc spring is coaxially sleeved on the outside of the elastic conductive contact assembly, its inner end is axially embedded and positioned on the side end face of the central dividing block, and its outer end is embedded in the spring limiting groove of the spring end seat. The thrust disc spring provides continuous axial elastic force by relying on the elastic deformation after pre-compression, and applies an axial pre-tightening thrust toward the outside of the split wire clamp through the spring end seat to provide initial clamping force for wire clamping.

[0014] In a preferred embodiment of the energy-saving power connection fitting of the present invention, the elastic conductive contact assembly includes a conductive base, a conductive post, a conductive contact piece, and a conductive post return spring. The conductive base is fixedly connected to the central dividing block. The conductive post is slidably mounted in the inner cavity of the conductive base along the axial direction. The conductive post return spring is fitted onto the conductive post. The conductive contact piece is fixedly connected to one end of the conductive post. One end of the conductive post return spring is connected to the conductive base, and the other end is connected to the conductive contact piece. Under the pushing force of the conductive post return spring, the conductive contact piece forms a flexible fit with the end face of the inserted wire.

[0015] As a preferred embodiment of the energy-saving power connection fitting of the present invention, the conductive base includes an insulating outer tube, a conductive inner tube, and a spring limiting groove. The conductive inner tube is fixedly installed in the inner cavity of the insulating outer tube, and the two are tightly nested together. The conductive inner tube is a hollow tubular structure made of a highly conductive metal material. Its inner cavity serves as a sliding installation chamber for the conductive post, providing axial sliding guidance and conductive conduction path for the conductive post. The outer end of the insulating outer tube is provided with a spring limiting groove for positioning and embedding the return spring of the conductive post.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention provides an elastic conductive contact component, which forms a flexible surface contact with the end face of the conductor through the conductive contact piece, and forms a dual conductive system by engaging the side conductive path of the split wire clamp side wall. This significantly increases the conductive contact area, effectively penetrates the oxide layer on the surface of the conductor, reduces the contact resistance at the joint, reduces heat generation and power loss during operation, and significantly improves the energy-saving performance of energy-saving fittings.

[0017] 2. This invention constructs a rigid locking mechanism that only advances and never retreats through the unidirectional meshing of the pawl unit and the ratchet sleeve. This allows the split wire clamp to feed towards the tube opening to continuously tighten the conductor, completely preventing the split wire clamp from sliding backward towards the middle of the tube. When the line is subjected to light wind vibration or galloping alternating loads, the locking structure directly counteracts the backward tendency of the wire clamp, completely solving the defects of traditional wedge-shaped splice tubes that rely solely on conical surface friction for loosening and are prone to micro-movement and slippage. The gripping stability is greatly improved, eliminating the safety hazards of splice loosening and wire breakage, and the long-term operating clamping reliability is significantly enhanced.

[0018] 3. This invention provides a continuous forward axial preload through the thrust disc spring of the preload thrust assembly. When the aluminum strands of the conductor undergo creep and the diameter decreases during long-term operation, the thrust disc spring automatically releases its stroke, pushing the split wire clamps forward synchronously to automatically compensate for the clamping gap caused by creep. With the help of the one-way locking mechanism, the compensated clamping position is rigidly locked, maintaining a stable clamping force and contact pressure throughout the process. No manual maintenance is required, which solves the problems of continuous attenuation of contact pressure and decline in energy-saving performance over time in traditional products after creep.

[0019] 4. This invention requires no hydraulic crimping tools. The ratchet locking mechanism is automatically triggered to unlock during wire insertion. After insertion, it automatically completes pre-locking and one-way locking. The installation can be completed by hand. The flared design of the guide horn reduces the difficulty of high-altitude alignment. The initial opening structure of the split clamp facilitates wire insertion, greatly shortening the operation time. It is especially suitable for emergency repairs, temporary power supply and other scenarios. The ease of installation is far superior to traditional splicing pipes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the connecting pipe section structure of the present invention; Figure 4 This is a schematic diagram of the structure of the split wire clamp, pawl locking mechanism, pre-tightening thrust assembly and elastic conductive contact assembly of the present invention. Figure 5 This is a schematic diagram of the structure of the split line clamp, pawl locking mechanism and pre-tightening thrust assembly of the present invention. Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a cross-sectional structural schematic diagram of the ratchet sleeve, the split line clamp, and the pawl locking mechanism of the present invention. Figure 8 for Figure 7 Enlarged view at point B in the middle; Figure 9 This is a schematic diagram of the split line clamp structure of the present invention; Figure 10 This is a schematic diagram of the cross-sectional structure of the wire clamp end ring seat of the present invention; Figure 11 This is a cross-sectional structural schematic diagram of the split wire clamp, pawl locking mechanism, pre-tightening thrust assembly and elastic conductive contact assembly of the present invention. Figure 12 for Figure 11 Enlarged view of point C.

[0021] The attached diagram lists the components represented by each number as follows: 100. Connecting pipe section; 110. Connecting pipe body; 111. Intermediate circular pipe section; 112. Tapered pipe end; 120. Central dividing block; 130. Ratchet sleeve; 140. Guide bell mouth; 200. Split clamp part; 210. Clamp end ring seat; 211. Clamp mounting groove; 212. Shaft mounting hole; 220. Split clamp body; 221. Clamp arm; 222. Raised bar clamp teeth; 223. Guide roller seat; 224. Connecting shaft; 225. Clamp reset torsion spring; 300. Pawl locking mechanism; 310. Pawl mounting ring seat; 311. Insertion interface; 320. Reinforced internal thread seat; 330. Trigger linkage assembly; 331. Trigger push rod; 332. Push ring; 333. Push rod return spring; 340. Pawl unit; 341. Pawl seat housing; 342. Locking pawl block; 343. Housing cover; 344. Guide post; 345. Pawl return spring; 346. Stop block head; 347. Driven mating inclined surface; 400. Preload thrust assembly; 410. Spring end seat; 420. Thrust disc spring; 500. Elastic conductive contact assembly; 510. Conductive base; 511. Insulating outer tube; 512. Conductive inner tube; 513. Spring limiting groove; 520. Conductive post; 530. Conductive contact piece; 540. Conductive post return spring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides a technical solution: such as Figures 1-12 The energy-saving power connection fitting shown includes a connection tube 100, a split wire clamp 200, a pawl locking mechanism 300, a pre-tightening thrust assembly 400, and an elastic conductive contact assembly 500. The inside of the connecting tube section 100 is provided with a ratchet sleeve 130; Two sets of the split wire clamp 200, the pawl locking mechanism 300, the pre-tightening thrust assembly 400, and the elastic conductive contact assembly 500 are provided, and are respectively provided on both sides inside the connecting tube 100. The split wire clamp 200 includes a wire clamp end ring seat 210 and multiple circumferential split clamp bodies 220. The split clamp bodies 220 are hinged to the wire clamp end ring seat 210, forming a clamping channel that is adapted to the conical surface of the connecting tube 100. When moving axially, radial expansion and contraction can be achieved simultaneously. The pawl locking mechanism 300 is connected and installed at one end of the split line clamp 200, and cooperates with the ratchet sleeve 130 provided in the connecting tube 100 to lock the split line clamp 200. The preload thrust assembly 400 is used to provide axial preload thrust to the split line clamp 200; Two sets of elastic conductive contact components 500 are respectively disposed on both sides of the connecting tube section 100, and are used to abut against the end face of the wire to achieve conduction.

[0024] In some embodiments of the present invention, reference is made to... Figures 1-3 As shown, the splice tube section 100 includes a splice tube body 110, a central partition block 120, a ratchet sleeve 130, and two guide bell mouths 140. The main body 110 of the connecting tube is a hollow tubular structure with symmetrical ends, including a middle circular tube section 111 and two conical tube ends 112. The two conical tube ends 112 are integrally connected to the two ends of the middle circular tube section 111. The diameter of the conical tube ends 112 gradually decreases from the inside to the outside, forming a conical inner cavity that is narrow on the outside and wide on the inside. The central dividing block 120 is coaxially fixed in the middle of the inner cavity of the connecting tube body 110, dividing the internal cavity of the connecting tube body 110 into two independent cavities on the left and right. The ratchet sleeve 130 is coaxially fixed to the inner wall of the connecting tube body 110. The inner wall of the ratchet sleeve 130 is provided with a one-way ratchet structure, which is used to cooperate with the pawl locking mechanism 300 to form a one-way locking engagement. Two guide horn openings 140 are coaxially fixed at both ends of the connector tube body 110. The outer end is a flared horn-shaped structure, and the inner diameter gradually narrows from the outside to the inside, which is used to guide the wire to be inserted into the connector tube body 110.

[0025] In some embodiments of the present invention, reference is made to... Figures 4-5 and Figures 7-11 As shown, the wire clamp end ring seat 210 is a coaxially arranged annular base. Multiple wire clamp mounting grooves 211 for connecting the segmented clamp body 220 are provided on its outer end face along the circumferential direction. Each wire clamp mounting groove 211 is provided with a shaft post mounting hole 212.

[0026] The segmented clamp 220 includes clamping arms 221, protruding clamping teeth 222, guide roller seat 223, connecting shaft 224, and clamping resetting torsion spring 225. The inner end of the clamping arm 221 is hinged to the shaft mounting hole 212 of the corresponding wire clamp mounting groove 211 through the connecting shaft 224. Multiple clamping arms 221 surround to form a clamping channel. The protruding clamping teeth 222 are set on the inner wall surface of the clamping arm 221 to bite the outer strand of the wire to improve the clamping grip. The guide roller seat 223 is installed on the outer wall surface of the clamping arm 221. The roller body of the guide roller seat 223 can form rolling contact with the inner wall of the tapered tube end 112 to reduce axial sliding resistance. A clamping and resetting torsion spring 225 is sleeved on the connecting shaft 224. The two ends of the clamping and resetting torsion spring 225 abut against the inner wall of the clamping arm 221 and the shaft mounting hole 212, respectively. It is used to drive each segment clamping body 220 to maintain a radially open state when there is no external force constraint, so as to facilitate the insertion of wires.

[0027] In some embodiments of the present invention, reference is made to... Figures 4-8 As shown, the pawl locking mechanism 300 includes a pawl mounting ring seat 310, a reinforced internal thread seat 320, a trigger linkage assembly 330, and multiple pawl units 340 evenly arranged circumferentially. The pawl mounting ring seat 310 is a coaxially arranged annular base, which is fixedly connected to the inner ring of the line clamp end ring seat 210. Multiple reinforced internal thread seats 320 are fixedly arranged circumferentially on the outer wall of the pawl mounting ring seat 310. The pawl mounting ring seat 310 has an insertion interface 311.

[0028] The trigger linkage assembly 330 includes a trigger push rod 331, a push ring 332, and a push rod return spring 333. The trigger push rod 331 slides axially through the insertion interface 311 of the pawl mounting ring seat 310. The push ring 332 is fixedly connected to one end of the trigger push rod 331. The push rod return spring 333 is sleeved on the outside of the trigger push rod 331, with its two ends abutting against the end face of the pawl mounting ring seat 310 and the end face of the push ring 332, respectively, to drive the trigger push rod 331 to maintain its initial state of extending forward out of the insertion interface 311.

[0029] Each pawl unit 340 includes a pawl housing 341, a locking pawl block 342, a cover 343, a guide post 344, a pawl return spring 345, and a stop head 346. The pawl housing 341 is fixedly installed on the side of the wire clamp end ring seat 210. The locking pawl block 342 is slidably assembled in the inner cavity of the pawl housing 341. The outer end of the locking pawl block 342 extends out of the pawl housing 341, and its end is unidirectionally adapted to the inner tooth groove of the ratchet sleeve 130. The axial length of the ratchet sleeve 130 is not less than the maximum feed stroke of the split wire clamp portion 200, ensuring that the locking pawl block 342 can cooperate with the ratchet sleeve 130 throughout its entire stroke, guiding... The pin 344 is fixedly connected to the inner end of the locking pawl block 342. The cover 343 is closed on the pawl seat 341. The guide pin 344 slides through the lower end of the pawl seat 341. The stop head 346 is fixed to the lower end of the guide pin 344. The pawl return spring 345 is sleeved on the outside of the guide pin 344. Its two ends abut against the lower end of the pawl seat 341 and the stop head 346, respectively, to drive the locking pawl block 342 to maintain its outward extension. The inner side of the locking pawl block 342 is provided with a driven engagement slope 347. The inner end of the trigger push rod 331 and the driven engagement slope 347 of each pawl unit 340 form a slope transmission engagement.

[0030] This invention constructs a rigid locking mechanism that only advances and never retreats through the unidirectional meshing of the pawl unit 340 and the ratchet sleeve 130. This allows the split wire clamp 200 to feed towards the tube opening to continuously tighten the conductor, completely preventing the split wire clamp 200 from sliding backward towards the middle of the tube. When the line is subjected to light wind vibration or galloping alternating loads, the locking structure directly counteracts the backward tendency of the wire clamp, completely solving the defects of traditional wedge-shaped splice tubes that rely solely on conical surface friction for loosening and are prone to micro-movement and slippage. The gripping stability is greatly improved, eliminating the safety hazards of splice loosening and wire breakage, and significantly enhancing the long-term operating clamping reliability.

[0031] In some embodiments of the present invention, reference is made to... Figures 4-5 and Figures 11-12As shown, the pre-tightening thrust assembly 400 includes a spring end seat 410 and a thrust disc spring 420. The spring end seat 410 is connected to the reinforced internal thread seat 320 by screws. An annular spring limiting groove is provided on its inner end face for coaxially embedding and positioning the outer end of the thrust disc spring 420. The thrust disc spring 420 is coaxially sleeved on the outside of the elastic conductive contact assembly 500. Its inner end is axially embedded and positioned on the side end face of the central dividing block 120, and its outer end is embedded in the spring limiting groove of the spring end seat 410. The thrust disc spring 420 provides continuous axial elastic force by relying on the elastic deformation after pre-compression. The spring end seat 410 applies an axial pre-tightening thrust toward the outside to the split wire clamp 200, providing an initial clamping force for wire clamping.

[0032] This invention provides a continuous forward axial preload through the thrust disc spring 420 of the preload thrust assembly 400. When the aluminum strands of the conductor undergo creep and the diameter decreases during long-term operation, the thrust disc spring 420 automatically releases its stroke, pushing the split wire clamp 200 forward synchronously, automatically compensating for the clamping gap caused by creep. With the help of the one-way locking mechanism, the compensated clamping position is rigidly locked, maintaining a stable clamping force and contact pressure throughout the process. No manual maintenance is required, solving the problems of continuous attenuation of contact pressure and decline in energy-saving performance over time in traditional products after creep.

[0033] In some embodiments of the present invention, reference is made to... Figure 4 and Figures 11-12 As shown, the elastic conductive contact assembly 500 includes a conductive base 510, a conductive post 520, a conductive contact piece 530, and a conductive post return spring 540. The conductive base 510 is fixedly connected to the central partition block 120. The conductive post 520 is slidably mounted in the inner cavity of the conductive base 510 along the axial direction. The conductive post return spring 540 is fitted on the conductive post 520. The conductive contact piece 530 is fixedly connected to one end of the conductive post 520. One end of the conductive post return spring 540 is connected to the conductive base 510, and the other end is connected to the conductive contact piece 530. Under the pushing force of the conductive post return spring 540, the conductive contact piece 530 forms a flexible fit with the end face of the inserted wire.

[0034] The conductive base 510 includes an insulating outer tube 511, a conductive inner tube 512, and a spring limiting groove 513. The conductive inner tube 512 is fixedly installed in the inner cavity of the insulating outer tube 511, and the two are tightly nested together. The ends of the conductive inner tubes 512 on both sides of the central separator block 120 are connected. The conductive inner tube 512 is a hollow tubular structure made of highly conductive metal material. Its inner cavity serves as a sliding installation chamber for the conductive post 520, providing axial sliding guidance and conductive conduction path for the conductive post 520. The outer end of the insulating outer tube 511 is provided with a spring limiting groove 513 for positioning and embedding the conductive post reset spring 540.

[0035] The present invention provides an elastic conductive contact component 500, which forms a flexible surface contact with the end face of the conductor through the conductive contact piece 530. Combined with the side conductive path of the split wire clamp 200, a dual conductive system is formed, which greatly increases the conductive contact area, effectively penetrates the oxide layer on the surface of the conductor, reduces the contact resistance at the joint, reduces heat generation and power loss during operation, and significantly improves the energy-saving performance of energy-saving fittings.

[0036] Working principle: When no wire is inserted, the clamping resetting torsion spring 225 drives each segment clamp 220 to remain open, and the inner diameter of the clamping channel is larger than the outer diameter of the wire; the push rod resetting spring 333 pushes the trigger push rod 331 to extend forward, the push ring 332 is in the front position, the locking pawl block 342 extends radially under the action of the pawl resetting spring 345, and engages with the ratchet teeth of the ratchet sleeve 130, and is in a one-way locking state, which can only slide forward and cannot be retracted backward; the conductive post resetting spring 540 pushes the conductive post 520 and the conductive contact piece 530 to the initial forward extension position.

[0037] The end of the wire to be connected is cut flat and inserted into the flared end of the guide horn 140, passing through the clamping channel enclosed by the split clamp body 220. The wire continues to be pushed backward, and the end face of the wire abuts against the push ring 332, pushing the trigger push rod 331 to move backward against the elastic force of the push rod return spring 333. The driving surface of the trigger push rod 331 acts on the driven engagement inclined surface 347 of the locking pawl block 342, and through the inclined surface transmission, all locking pawl blocks 342 are pushed to retract radially against the elastic force of the pawl return spring 345. The teeth of the locking pawl block 342 disengage from the tooth groove of the ratchet sleeve 130, releasing the one-way locking constraint. At this time, the split wire clamp part 200 can slide freely back and forth axially.

[0038] After the lock is released, the thrust disc spring 420 releases its preload, pushing the spring end seat 410, the pawl mounting ring seat 310, and the wire clamp end ring seat 210 forward axially as a whole; the split clamp body 220 moves forward synchronously with the wire clamp end ring seat 210, and under the constraint of the conical surface of the inner wall of the conical tube end 112, all the clamp arms 221 rotate radially around the connecting shaft 224 and retract, and the protruding bar clamp teeth 222 gradually bite the outer strand of the conductor, completing the initial clamping of the conductor.

[0039] As the conductor continues to advance to the predetermined depth, the end face of the conductor presses against the conductive contact piece 530, pushing the conductive post 520 to retract backward against the elastic force of the conductive post return spring 540. The conductive post return spring 540 is further compressed, and its reaction force causes the conductive contact piece 530 to fit tightly against the end face of the conductor, forming a stable end face conductive path. Together with the engagement and conduction of the side wall clamp, it forms a dual conductive path.

[0040] After the wire is inserted into place, the wire is released, and the thrust disc spring 420 continues to push the split wire clamp 200 forward to clamp it; at this time, the locking pawl block 342 extends radially again under the action of the pawl return spring 345 and gets into the corresponding tooth groove of the ratchet sleeve 130.

[0041] Because the ratchet is a unidirectional tooth shape with the front side inclined and the rear side vertical, when the split line clamp 200 is fed forward, the inclined surface of the locking pawl block 342 slides smoothly along the inclined surface of the ratchet, and can be continuously fed forward and tightened; once the split line clamp 200 shows a tendency to retreat, the vertical end face of the locking pawl block 342 directly abuts against the vertical side wall of the ratchet, forming a rigid mechanical lock, completely preventing the line clamp from loosening backward, and ensuring that the clamping force only increases and does not decrease.

[0042] When the conductor is subjected to axial tension (line tension, wind vibration tension, etc.), the conductor drives the split wire clamp 200 to slide forward through the protruding tooth 222; the conical wedge effect of the tapered tube end 112 converts the axial tension into a stronger radial clamping force. The greater the tension, the stronger the clamping force, forming a force-increasing effect of tightening as it is pulled.

[0043] During long-term operation of the line, when the aluminum strands of the conductor undergo creep and the diameter decreases, the thrust disc spring 420 automatically releases its compression stroke and continuously pushes the split wire clamp 200 forward to automatically compensate for the creep gap and maintain a stable clamping force and contact pressure. At the same time, the locking pawl block 342 follows and engages in a new toothed position, continuously maintaining a locked state that only moves forward and never backward, without the need for manual intervention throughout the entire process.

[0044] In terms of conductivity, the conductor current is conducted through two paths: the side wall split wire clamp 200 and the end face elastic conductive contact component 500. The large contact area and low contact resistance effectively reduce heat generation and power loss at the connection, achieving energy-saving operation.

Claims

1. An energy-saving power connection fitting, comprising a connection tube (100), characterized in that: It also includes a split wire clamp (200), a pawl locking mechanism (300), a pre-tightening thrust assembly (400), and an elastic conductive contact assembly (500); The inside of the connecting tube section (100) is provided with a ratchet sleeve (130). The split wire clamp (200), pawl locking mechanism (300), pre-tightening thrust assembly (400) and elastic conductive contact assembly (500) are each provided in two sets, and are respectively provided on both sides inside the connecting tube (100). The split wire clamp (200) includes a wire clamp end ring seat (210) and multiple circumferential split clamp bodies (220). The split clamp bodies (220) are hinged to the wire clamp end ring seat (210) to form a clamping channel, which is adapted to the conical surface of the connecting tube (100). When moving axially, radial contraction and expansion can be realized simultaneously. The pawl locking mechanism (300) is connected and installed at one end of the split line clamp (200), and cooperates with the ratchet sleeve (130) provided in the connecting tube (100) to lock the split line clamp (200); The preload thrust assembly (400) is used to provide axial preload thrust to the split line clamp (200); The two sets of elastic conductive contact components (500) are respectively disposed on both sides of the connecting tube (100) for contacting the end face of the wire to achieve conduction.

2. The energy-saving power connection fitting according to claim 1, characterized in that: The connecting tube section (100) includes a connecting tube body (110), a central partition block (120), a ratchet sleeve (130), and two guide bell mouths (140). The main body (110) of the connecting tube is a hollow tubular structure with symmetrical ends, including a middle circular tube section (111) and two conical tube ends (112). The two conical tube ends (112) are integrally connected to the two ends of the middle circular tube section (111). The diameter of the conical tube ends (112) gradually decreases from the inside to the outside, forming a conical inner cavity that is narrow on the outside and wide on the inside. The central dividing block (120) is coaxially fixed in the middle of the inner cavity of the connecting tube body (110), dividing the internal cavity of the connecting tube body (110) into two independent cavities on the left and right. The ratchet sleeve (130) is coaxially fixed on the inner wall of the connecting tube body (110). The inner wall of the ratchet sleeve (130) is provided with a one-way ratchet structure, which is used to cooperate with the pawl locking mechanism (300) to form a one-way locking engagement. Two guide horn openings (140) are coaxially fixed at both ends of the connector tube body (110). The outer end is a flared horn-shaped structure, and the inner diameter gradually narrows from the outside to the inside, which is used to guide the wire to be inserted into the connector tube body (110).

3. The energy-saving power connection fitting according to claim 2, characterized in that: The wire clamp end ring seat (210) is a coaxially arranged annular base. Multiple wire clamp mounting grooves (211) for connecting the segmented clamp body (220) are provided on its outer end face along the circumferential direction. Each wire clamp mounting groove (211) is provided with a shaft post mounting hole (212).

4. The energy-saving power connection fitting according to claim 3, characterized in that: The segmented clamp (220) includes clamping arms (221), protruding clamping teeth (222), guide roller seat (223), connecting shaft (224), and clamping resetting torsion spring (225). The inner end of the clamping arm (221) is hinged to the shaft post mounting hole (212) opened in the corresponding wire clamp mounting groove (211) through the connecting shaft (224). Multiple clamping arms (221) surround to form a clamping channel. The protruding clamping teeth (222) are set on the inner wall surface of the clamping arm (221) to bite the outer strand of the wire to improve the clamping grip. The guide roller seat (223) is installed on the outer wall surface of the clamping arm (221). The roller body of the guide roller seat (223) can form rolling contact with the inner wall of the tapered tube end (112) to reduce axial sliding resistance. The connecting shaft (224) is fitted with the clamping resetting torsion spring (225). The two ends of the clamping resetting torsion spring (225) abut against the inner wall of the clamping arm (221) and the shaft mounting hole (212) respectively. It is used to drive each segment clamp (220) to maintain a radially open state when there is no external force constraint, so as to facilitate the insertion of wires.

5. The energy-saving power connection fitting according to claim 4, characterized in that: The pawl locking mechanism (300) includes a pawl mounting ring seat (310), a reinforced internal thread seat (320), a trigger linkage assembly (330), and a plurality of pawl units (340) evenly arranged circumferentially. The pawl mounting ring seat (310) is a coaxially arranged annular base, which is fixedly connected to the inner ring of the clamp end ring seat (210). A plurality of reinforced internal thread seats (320) are fixedly arranged circumferentially on the outer wall of the pawl mounting ring seat (310). The pawl mounting ring seat (310) is provided with a insertion interface (311).

6. The energy-saving power connection fitting according to claim 5, characterized in that: The trigger linkage assembly (330) includes a trigger push rod (331), a push ring (332), and a push rod return spring (333). The trigger push rod (331) slides axially through the insertion interface (311) of the pawl mounting ring seat (310). The push ring (332) is fixedly connected to one end of the trigger push rod (331). The push rod return spring (333) is sleeved on the outside of the trigger push rod (331), with its two ends abutting against the end face of the pawl mounting ring seat (310) and the end face of the push ring (332), respectively, to drive the trigger push rod (331) to maintain its initial state of extending forward out of the insertion interface (311).

7. The energy-saving power connection fitting according to claim 6, characterized in that: Each pawl unit (340) includes a pawl housing (341), a locking pawl block (342), a cover (343), a guide post (344), a pawl return spring (345), and a stop head (346). The pawl housing (341) is fixedly installed on the side of the wire clamp end ring seat (210). The locking pawl block (342) is slidably assembled in the inner cavity of the pawl housing (341). The outer end of the locking pawl block (342) extends out of the pawl housing (341), and its end is unidirectionally adapted to the inner tooth groove of the ratchet sleeve (130). The guide post (344) is fixedly connected to the locking pawl block (342). The inner end of the pawl seat (341) is covered by the cover (343). The guide post (344) slides through the lower end of the pawl seat (341). The stop head (346) is fixed to the lower end of the guide post (344). The pawl return spring (345) is sleeved on the outside of the guide post (344). Its two ends abut against the lower end of the pawl seat (341) and the stop head (346) respectively, and are used to drive the locking pawl block (342) to keep it in an outwardly extended state. The inner side of the locking pawl block (342) is provided with a driven engagement inclined surface (347), which is used to form an inclined surface transmission engagement with the trigger push rod (331).

8. The energy-saving power connection fitting according to claim 7, characterized in that: The pre-tightening thrust assembly (400) includes a spring end seat (410) and a thrust disc spring (420). The spring end seat (410) is connected to the reinforced internal thread seat (320) by screws. An annular spring limiting groove is provided on its inner end face for coaxially embedding and positioning the outer end of the thrust disc spring (420). The thrust disc spring (420) is coaxially sleeved on the outside of the elastic conductive contact assembly (500). Its inner end is axially embedded and positioned on the side end face of the central dividing block (120), and its outer end is embedded in the spring limiting groove of the spring end seat (410). The thrust disc spring (420) provides continuous axial elastic force by relying on the elastic deformation after pre-compression. The spring end seat (410) applies an axial pre-tightening thrust toward the outside to the split wire clamp (200) to provide initial clamping force for wire clamping.

9. An energy-saving power connection fitting according to claim 8, characterized in that: The elastic conductive contact assembly (500) includes a conductive base (510), a conductive post (520), a conductive contact piece (530), and a conductive post return spring (540). The conductive base (510) is fixedly connected to the central partition block (120). The conductive post (520) is axially slidably assembled in the inner cavity of the conductive base (510). The conductive post return spring (540) is fitted on the conductive post (520). The conductive contact piece (530) is fixedly connected to one end of the conductive post (520). One end of the conductive post return spring (540) is connected to the conductive base (510), and the other end is connected to the conductive contact piece (530). Under the pushing force of the conductive post return spring (540), the conductive contact piece (530) forms a flexible fit with the end face of the inserted wire.

10. An energy-saving power connection fitting according to claim 9, characterized in that: The conductive base (510) includes an insulating outer tube (511), a conductive inner tube (512), and a spring limiting groove (513). The conductive inner tube (512) is fixedly installed in the inner cavity of the insulating outer tube (511), and the two are tightly nested together. The conductive inner tube (512) is a hollow tubular structure made of highly conductive metal material. Its inner cavity serves as a sliding installation chamber for the conductive post (520), providing axial sliding guidance and conductive conduction path for the conductive post (520). The outer end of the insulating outer tube (511) is provided with a spring limiting groove (513) for positioning and embedding the conductive post reset spring (540).

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