CN111969546A

CN111969546A - Power line connecting device

Info

Publication number: CN111969546A
Application number: CN202010917394.2A
Authority: CN
Inventors: 李孝娥
Original assignee: 李孝娥
Current assignee: Shandong chenzhiyi Information Technology Co.,Ltd.
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2020-11-20
Anticipated expiration: 2040-09-03
Also published as: CN111969546B

Abstract

The invention discloses a power line connecting device which comprises two conductive clamping plates which are arranged in an up-and-down symmetrical mode, wherein the middle parts of the two conductive clamping plates are fastened through two bolt assemblies which are distributed in the left-and-right direction; two clamping grooves distributed in the front-back direction are formed between the two conductive clamping plates, and each clamping groove is used for clamping the end part of one of the power lines; each conductive clamping plate faces one side of each clamping groove, an arc-shaped groove used for embedding the power line part is formed in the position where each clamping groove is located, a plurality of convex ribs distributed along the length direction of each arc-shaped groove are integrally formed on the inner wall of each arc-shaped groove, and two ends of each convex rib respectively extend to two side edges of the arc-shaped groove; the invention can effectively avoid the phenomenon that the power line is separated from the clamping groove, thereby improving the reliability of the power line after being connected with the power line connecting device.

Description

Power line connecting device

Technical Field

The invention relates to the technical field of power connection devices, in particular to a power line connection device.

Background

The power line connection device is a device for connecting two power lines, and the two power lines can be electrically connected after being connected by the power line connection device, but at present, the power line connection device in the market does not have a reliable anti-drop structure between the power line connection device and the power line after fixing the end portions of the two power lines, so that the power line is easily separated from the power line connection device, that is, the power line and the power line connection device have the defect of poor connection reliability.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the power line connecting device, which can increase the friction force between the power line and the conductive clamping plates when the two conductive clamping plates clamp the power line after the inner wall of the arc-shaped groove is provided with the plurality of convex ribs distributed along the length direction of the arc-shaped groove, so that the phenomenon that the power line is separated from the clamping groove can be effectively avoided, and the reliability of the power line connected with the power line connecting device can be improved.

The power line connecting device comprises two conductive clamping plates which are arranged in an up-and-down symmetrical mode, wherein the middle parts of the two conductive clamping plates are fastened through two bolt assemblies which are distributed in the left-and-right direction; two clamping grooves distributed in the front-back direction are formed between the two conductive clamping plates, and each clamping groove is used for clamping the end part of one of the power lines; every electrically conductive splint all is provided with the arc wall that is used for power line part embedding towards one side of pressing from both sides the groove and being located every clamp groove position department, and integrated into one piece has a plurality of protruding muscle that distribute along arc wall length direction on the inner wall of arc wall, and two sides departments that do not extend to the arc wall at place are equallyd divide at the both ends of every protruding muscle.

The power line connecting device comprises a locking ring and a bolt body, wherein the middle part of the locking ring is provided with a groove with an opening at the upper end and used for embedding the head part in the bolt body, the bottom of the groove is provided with a through hole used for a screw rod part in the bolt body to pass through, and the through hole and the locking ring are coaxially arranged; a plurality of locking grooves which are uniformly distributed in the circumferential direction are formed in the locking ring positioned at the bottom of the groove, a hexagonal sunk groove is formed in the middle of the upper end face of the head in the bolt body and is used for being matched with the end part of an external hexagonal wrench, four sliding cavities which are uniformly distributed in the circumferential direction and are provided with openings at the lower end are formed in the lower end face of the head in the bolt body, an arc-shaped locking block is connected in each sliding cavity in a sliding mode, a tooth head used for being clamped with one locking groove is formed in the middle of the lower end face of each locking block, and a driving structure used for driving the locking blocks to move along the sliding cavities so that the tooth heads on the locking blocks are separated from the locking grooves or clamped with the locking grooves is arranged in the bolt body; the conductive clamping plate positioned above is provided with a countersunk hole for embedding the locking ring, and the bolt body movably penetrates through the locking ring and the countersunk hole and then is in threaded connection with a threaded hole in the conductive clamping plate positioned below.

The power line connecting device comprises a driving structure, a driving structure and a connecting structure, wherein the driving structure comprises a guide pillar and a spring, a blind hole is formed in a bolt body positioned below a sinking groove, the lower end of the guide pillar is inserted into the blind hole and is in sliding connection with the blind hole, the spring is arranged in the blind hole, and two ends of the spring are respectively abutted against the inner bottom of the blind hole and the lower end face of the guide pillar; a sliding rod is integrally formed in the middle of the upper end face of each locking block, a sliding hole for the sliding rod to insert and slide is formed in the top of each sliding cavity, a sliding way is arranged in the bolt body between each sliding hole and the blind hole, each sliding way extends along the radial direction of the bolt body, a top rod is connected in each sliding way in a sliding mode, one side, facing the top rod, of each sliding rod is provided with a slot for inserting the outer end part of the top rod, the lower surface of the outer end part of each top rod is provided with a first inclined surface, and the inner bottom of each slot is provided with a second inclined surface matched with the first inclined surface to slide; a first annular step and a second annular step for supporting the inner end part of the ejector rod are arranged on the outer peripheral wall of the guide pillar, the first annular step is positioned above the second annular step, an annular conical surface with a small upper part and a large lower part is arranged between the first annular step and the second annular step, the upper end of the annular conical surface is connected with the lower end of the first annular step, and the lower end of the annular conical surface is connected with the upper end of the second annular step; magnets are embedded on the upper end faces of the two end parts of each locking block and are used for being magnetically attracted with the bolt body to drive the locking blocks to move upwards for resetting; an expansion hole with the inner diameter larger than that of the blind hole is arranged between the sinking groove and the blind hole and is used for the guide pillar to pass through; when the inner end part of the ejector rod is abutted against the first annular step, the outer end part of the ejector rod is completely retracted into the slideway, at the moment, the locking block moves upwards to reset, and the tooth head on the locking block is separated from the locking groove on the locking ring; when the inner end part of the ejector rod is supported on the second annular step, the outer end part of the ejector rod pushes the locking block to move downwards to the place, and at the moment, the tooth head on the locking block is clamped with the locking groove on the locking ring; and a channel for the ejector rod to pass through and for the ejector rod to be installed in the slideway is arranged in the bolt body positioned on the outer side of each sliding hole.

In the power line connecting device of the present invention, the height of the guide post above the first annular step is the same as the height of the expanded hole.

According to the power line connecting device, the peripheral wall of the locking ring is provided with a plurality of saw-tooth grooves which are uniformly distributed in the circumferential direction, and each saw-tooth groove extends along the axial direction of the locking ring.

According to the invention, after the plurality of convex ribs distributed along the length direction of the arc-shaped groove are arranged on the inner wall of the arc-shaped groove, when the two conductive clamping plates clamp the power line, the friction force between the power line and the conductive clamping plates can be increased, so that the phenomenon that the power line is separated from the clamping groove can be effectively avoided, and the reliability of the power line and the power line connecting device after connection can be improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic diagram of a right-view structure of two power lines connected by the present invention;

FIG. 3 is a schematic cross-sectional view of one of the present invention;

FIG. 4 is another cross-sectional structural schematic of the present invention;

FIG. 5 is a schematic top view of the locking ring;

FIG. 6 is a cross-sectional structural view of the locking collar;

FIG. 7 is a schematic top view of the bolt body;

FIG. 8 is a bottom view of the bolt body;

FIG. 9 is a cross-sectional structural view of the bolt body;

FIG. 10 is a perspective view of the locking block;

FIG. 11 is a schematic top view of the magnet engaged with the lock block;

FIG. 12 is a cross-sectional view of the end of the alien wrench inserted into a counterbore in the bolt body;

fig. 13 is a schematic cross-sectional view after the ram is installed in the bolt body and the end of the alien wrench is inserted into the counterbore in the bolt body while the lock block is installed in the slide cavity.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The power line connecting device comprises two conductive clamping plates 1 which are arranged in an up-down symmetrical mode, wherein the middle parts of the two conductive clamping plates 1 are fastened through two bolt assemblies which are distributed in the left-right direction; two clamping grooves 2 distributed in the front-back direction are formed between the two conductive clamping plates 1, and each clamping groove 2 is used for clamping the end part of one of the power lines 3; every electrically conductive splint 1 all is provided with the arc wall 11 that is used for the 3 partial embedding of power line towards one side of pressing from both sides groove 2 and being located every position department that presss from both sides groove 2, and integrated into one piece has a plurality of protruding muscle 12 that distribute along 11 length direction of arc wall on the inner wall of arc wall 11, and two sides departments that do not extend to place arc wall 11 are equallyd divide at the both ends of every protruding muscle 12.

Each bolt assembly comprises a locking ring 4 and a bolt body 5, the middle part of the locking ring 4 is provided with a groove 41 with an upper end opened and used for embedding a head part 51 in the bolt body 5, the bottom of the groove 41 is provided with a through hole 42 used for a screw rod part 52 in the bolt body 5 to pass through, and the through hole 42 is coaxially arranged with the locking ring 4; a plurality of locking grooves 43 which are uniformly distributed in the circumferential direction are formed in the locking ring 4 positioned at the bottom of the groove 41, a hexagonal sunk groove 53 is formed in the middle of the upper end face of the head 51 in the bolt body 5, the sunk groove 53 is used for being matched with the end part of the external hexagonal wrench 6, four sliding cavities 54 which are uniformly distributed in the circumferential direction and have an open lower end are formed in the lower end face of the head 51 in the bolt body 5, an arc-shaped locking block 7 is slidably connected in each sliding cavity 54, a tooth head 71 which is respectively used for being clamped with one locking groove 43 is formed in the middle of the lower end face of each locking block 7, and a driving structure which is used for driving the locking block 7 to move along the sliding cavities 54 so that the tooth head 71 on the locking block 7 is separated from the locking groove 43 or is clamped with the locking groove 43 is arranged in the bolt body 5; a countersunk hole 13 for embedding the lock ring 4 is formed in the upper conductive clamp plate 1, and the bolt body 5 movably penetrates through the lock ring 4 and the countersunk hole 13 and then is in threaded connection with a threaded hole 14 in the lower conductive clamp plate 1; after the bolt assembly is adopted, after the locking ring is tightly embedded with the countersunk hole in the conductive clamping plate positioned above, and after the bolt body is screwed with the conductive clamping plate positioned below, the self-locking function can be realized between the bolt body and the locking ring, so that the phenomenon that the bolt body is loosened can be effectively avoided, namely, the phenomenon that the two conductive clamping plates fastened through the bolt body are loosened can be avoided, and the reliability of the two conductive clamping plates after clamping a power line can be improved.

The driving structure comprises a guide post 8 and a spring 9, a blind hole 55 is arranged in the bolt body 5 below the sinking groove 53, the lower end of the guide post 8 is inserted into the blind hole 55 and is in sliding connection with the blind hole 55, the spring 9 is arranged in the blind hole 55, and two ends of the spring 9 respectively abut against the inner bottom of the blind hole 55 and the lower end surface of the guide post 8; a sliding rod 72 is integrally formed in the middle of the upper end face of each locking block 7, a sliding hole 56 for the sliding rod 72 to insert and slide is formed in the top of each sliding cavity 54, a sliding way 57 is formed in the bolt body 5 between each sliding hole 56 and the blind hole 55, each sliding way 57 extends along the radial direction of the bolt body 5, a top rod 10 is connected in each sliding way 57 in a sliding manner, a slot 73 for inserting the outer end part of the top rod 10 is formed in one side, facing the top rod 10, of each sliding rod 72, a first inclined surface 101 is formed in the lower surface of the outer end part of each top rod 10, and a second inclined surface 74 for sliding in cooperation with the first inclined surface 101 is formed in the inner bottom of each slot 73; a first annular step 81 and a second annular step 82 for supporting the inner end part of the ejector rod 10 are arranged on the outer peripheral wall of the guide post 8, the first annular step 81 is positioned above the second annular step 82, an annular conical surface 83 with a small upper part and a large lower part is arranged between the first annular step 81 and the second annular step 82, the upper end of the annular conical surface 83 is connected with the lower end of the first annular step 81, and the lower end of the annular conical surface 83 is connected with the upper end of the second annular step 82; magnets 75 are embedded on the upper end faces of the two end parts of each locking piece 7, and the magnets 75 are magnetically attracted with the bolt body 5 to drive the locking pieces 7 to move upwards for resetting; an expansion hole 58 with the inner diameter larger than that of the blind hole 55 is arranged between the sinking groove 53 and the blind hole 55, and the expansion hole 58 is used for the guide pillar 8 to pass through; when the inner end part of the ejector rod 10 is abutted against the first annular step 81, the outer end part of the ejector rod 10 is completely retracted into the slide way 57, at the moment, the locking block 7 moves upwards to reset, and the tooth head 71 on the locking block 7 is separated from the locking groove 43 on the locking ring 4; when the inner end part of the ejector rod 10 is supported on the second annular step 82, the outer end part of the ejector rod 10 pushes the locking block 7 to move downwards to a proper position, and at the moment, the tooth head 71 on the locking block 7 is clamped with the locking groove 43 on the locking ring 4; a channel 59 for the mandril 10 to pass through and for the mandril 10 to be installed in the slideway 57 is arranged in the bolt body 5 outside each sliding hole 56; by adopting the driving structure, after the end part of the outer hexagonal wrench is inserted into the sinking groove, the end part of the outer hexagonal wrench can push the guide pillar to move downwards to the place, at the moment, the inner end part of the ejector rod can be separated from the second annular step, meanwhile, under the magnetic attraction of the magnet on the locking block and the bolt body, the locking block can move upwards to the place, meanwhile, the locking block can drive the ejector rod to contract inwards, after the locking block moves upwards to the place, the tooth head on the lower end surface of the locking block can be separated from the locking groove on the locking ring, thus, the bolt body and the locking ring can be unlocked, and the bolt body can be rotated by the outer hexagonal wrench; when the end part of the outer hexagonal wrench is pulled out of the sinking groove, the spring can push the guide post to move upwards for resetting, at the moment, under the action of the annular conical surface, the annular conical surface can push the ejector rod outwards, finally, the inner end part of the ejector rod can be supported on the second annular step again, meanwhile, after the ejector rod moves outwards for resetting, the locking block can move downwards for resetting under the matching action of the first inclined surface on the ejector rod and the second inclined surface on the slide rod, at the moment, the tooth head on the lower end surface of the locking block can be clamped with the locking groove on the locking ring again, and therefore the locking of the bolt body and the locking ring is realized; the application aims to install the ejector rod into the slide way through the arrangement of the channel, namely when the spring and the guide post are installed in the blind hole and the lock block is not installed on the bolt body, the ejector rod can be installed into the slide way through the channel, after the ejector rod is installed in the slide way, the inner end part of the ejector rod is abutted against the first annular step on the guide post (after the inner end part of the ejector rod is abutted against the first annular step, the outer end part of the ejector rod can be retracted into the slide way, so that the slide rod on the lock block can be inserted into the slide hole, namely, the lock block can be installed in the slide cavity), then the lock block is installed in the slide cavity, after the spring, the guide post, the ejector rod and the lock block are assembled with the bolt body, the spring can drive the guide post to move upwards, at the inner end part of the ejector rod can be supported on the second annular step, so under the cooperation action of the first inclined plane on the ejector rod and, the locking block can be moved downwards to be reset.

The height of the guide post 8 above the first annular step 81 is the same as the height of the expansion hole 58; after adopting this kind of structure, move down the back that targets in place at the guide pillar, insert the heavy groove at outer hexagonal spanner's tip promptly in, the guide pillar that is located first annular step top can enter into the expansion hole completely, so, can avoid the guide pillar to cause the interference to outer hexagonal spanner's tip.

A plurality of sawtooth grooves 44 which are uniformly distributed in the circumferential direction are formed in the outer circumferential wall of the locking ring 4, and each sawtooth groove 44 extends along the axial direction of the locking ring 4; through the setting of sawtooth groove, can further increase the frictional force between the counter sink in the conductive clamping plate that the catch is arranged in the top, can effectively avoid the catch to appear the phenomenon that the conductive clamping plate free rotation of relative position in the top appears.

When the bolt assembly is connected with the two conductive clamping plates, the locking ring in the bolt assembly is firstly embedded into the countersunk hole in the conductive clamping plate above (the embedding process of the locking ring and the countersunk hole can be completed by a press), and then the bolt body penetrates through the locking ring and the countersunk hole and is in threaded connection with the conductive clamping plate below. When two power lines need to be fixed with the electric power fixing device, the end parts of the two power lines are respectively inserted into one of the clamping grooves, then the end part of the outer hexagonal wrench is inserted into the sinking groove on the bolt body and the bolt body is rotated, so that the bolt body can fasten the two conductive clamping plates, and after the two conductive clamping plates are fastened through the bolt body, the two conductive clamping plates can clamp the end parts of the two power lines, namely, the two power lines are electrically connected. After the two conductive clamping plates are fastened through the bolt body, and the end part of the outer hexagonal wrench is pulled out of the sinking groove, the spring can push the guide pillar to move upwards for resetting, at the moment, the annular conical surface can push the ejector rod outwards under the action of the annular conical surface, finally, the inner end part of the ejector rod can be supported on the second annular step again, meanwhile, after the ejector rod moves outwards for resetting, the locking block can move downwards for resetting under the matching action of the first inclined surface on the ejector rod and the second inclined surface on the slide rod, at the moment, the tooth head on the lower end surface of the locking block can be clamped with the locking groove on the locking ring, and therefore, the locking of the bolt body and the locking ring is realized, and the self-locking of the bolt body is also realized; when the two conductive clamping plates need to release the clamping of the end part of the power line, the end part of the outer hexagonal wrench is inserted into the sinking groove, after the end part of the outer hexagonal wrench is inserted into the sinking groove, the end part of the outer hexagonal wrench can push the guide pillar to move downwards to be in place, at the moment, the inner end part of the ejector rod can be separated from the second annular step, meanwhile, under the magnetic attraction of the magnet on the locking block and the bolt body, the locking block can move upwards to be in place, meanwhile, the locking block can drive the ejector rod to shrink inwards, after the locking block moves upwards to be in place, the tooth head on the lower end face of the locking block can be separated from the locking groove on the locking ring, in this way, the bolt body and the locking ring can be unlocked, namely, the bolt body can be gradually screwed out from the threaded hole in the conductive clamping plate positioned below by rotating the outer hexagonal wrench, after the bolt body, the distance between the two conductive clamping plates can be increased, and at the moment, the two conductive clamping plates can release the clamping of the power line.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A power line connecting device comprises two conductive clamping plates (1) which are arranged in an up-down symmetrical mode, wherein the middle parts of the two conductive clamping plates (1) are fastened through two bolt assemblies which are distributed in the left-right direction; two clamping grooves (2) distributed in the front-back direction are formed between the two conductive clamping plates (1), and each clamping groove (2) is used for clamping the end part of one power line (3); the method is characterized in that: every conductive splint (1) is towards one side of pressing from both sides groove (2) and is located every and presss from both sides groove (2) position department and all is provided with arc wall (11) that are used for power line (3) partial embedding, integrated into one piece has protruding muscle (12) that a plurality of ways distribute along arc wall (11) length direction on the inner wall of arc wall (11), and two sides departments that do not extend to place arc wall (11) are equallyd divide at the both ends of every way protruding muscle (12).

2. The power line connection device according to claim 1, wherein each bolt assembly includes a lock ring (4) and a bolt body (5), a middle portion of the lock ring (4) is provided with a groove (41) which is open at an upper end and into which a head portion (51) in the bolt body (5) is inserted, a bottom portion of the groove (41) is provided with a through hole (42) through which a screw portion (52) in the bolt body (5) passes, and the through hole (42) is coaxially arranged with the lock ring (4); a plurality of locking grooves (43) which are uniformly distributed in the circumferential direction are arranged in the locking ring (4) positioned at the bottom of the groove (41), the middle part of the upper end surface of the head part (51) in the bolt body (5) is provided with a regular hexagonal sunk groove (53), the sunk groove (53) is used for being matched with the end part of an outer hexagonal wrench (6), four sliding cavities (54) which are uniformly distributed in the circumferential direction and have an opening at the lower end are arranged on the lower end surface of the head part (51) in the bolt body (5), an arc-shaped locking block (7) is connected in each sliding cavity (54) in a sliding manner, a tooth head (71) which is respectively used for being clamped with one locking groove (43) is arranged in the middle of the lower end surface of each locking block (7), a driving structure for driving the locking block (7) to move along the sliding cavity (54) so as to enable the tooth head (71) on the locking block (7) to be separated from the locking groove (43) or be clamped with the locking groove (43) is arranged in the bolt body (5); the conductive clamping plate (1) positioned above is provided with a countersunk hole (13) for embedding the locking ring (4), and the bolt body (5) movably penetrates through the locking ring (4) and the countersunk hole (13) and then is in threaded connection with a threaded hole (14) in the conductive clamping plate (1) positioned below.

3. The device according to claim 2, wherein the driving structure comprises a guide post (8) and a spring (9), a blind hole (55) is provided in the bolt body (5) below the sinking groove (53), the lower end of the guide post (8) is inserted into the blind hole (55) and is slidably connected with the blind hole (55), the spring (9) is provided in the blind hole (55), and two ends of the spring (9) respectively abut against the inner bottom of the blind hole (55) and the lower end surface of the guide post (8); a sliding rod (72) is integrally formed in the middle of the upper end face of each locking block (7), a sliding hole (56) for the sliding rod (72) to insert and slide is formed in the top of each sliding cavity (54), a sliding way (57) is formed in the bolt body (5) between each sliding hole (56) and the blind hole (55), each sliding way (57) extends along the radial direction of the bolt body (5), a top rod (10) is connected to each sliding way (57) in a sliding mode, a slot (73) for inserting the outer end portion of the top rod (10) is formed in one side, facing the top rod (10), of each sliding rod (72), a first inclined face (101) is formed in the lower surface of the outer end portion of each top rod (10), and a second inclined face (74) matched with the first inclined face (101) to slide is formed in the inner bottom of each slot (73); a first annular step (81) and a second annular step (82) which are used for supporting the inner end part of the ejector rod (10) are arranged on the outer peripheral wall of the guide post (8), the first annular step (81) is positioned above the second annular step (82), an annular conical surface (83) which is small in upper part and large in lower part is arranged between the first annular step (81) and the second annular step (82), the upper end of the annular conical surface (83) is connected with the lower end of the first annular step (81), and the lower end of the annular conical surface (83) is connected with the upper end of the second annular step (82); magnets (75) are embedded on the upper end faces of the two end parts of each locking block (7), and the magnets (75) are magnetically attracted with the bolt body (5) to drive the locking blocks (7) to move upwards for resetting; an expansion hole (58) with the inner diameter larger than that of the blind hole (55) is arranged between the sinking groove (53) and the blind hole (55), and the expansion hole (58) is used for a guide pillar (8) to pass through; when the inner end part of the ejector rod (10) is abutted against the first annular step (81), the outer end part of the ejector rod (10) is completely retracted into the slide way (57), at the moment, the lock block (7) moves upwards to reset, and the tooth head (71) on the lock block (7) is separated from the lock groove (43) on the lock ring (4); when the inner end part of the ejector rod (10) is supported on the second annular step (82), the outer end part of the ejector rod (10) pushes the locking block (7) to move downwards to the right position, and at the moment, a tooth head (71) on the locking block (7) is clamped with a locking groove (43) on the locking ring (4); and a channel (59) for the mandril (10) to pass through and for the mandril (10) to be installed into the slideway (57) is arranged in the bolt body (5) positioned outside each sliding hole (56).

4. The device according to claim 3, characterized in that the height of the guide post (8) above the first annular step (81) is the same as the height of the expanded hole (58).

5. The power line connection device according to claim 2, wherein the outer peripheral wall of the lock ring (4) is provided with a plurality of saw-tooth grooves (44) uniformly distributed in the circumferential direction, and each saw-tooth groove (44) extends in the axial direction of the lock ring (4).