CN106532561A - Centrifuging clamping apparatus with backup protection - Google Patents

Abstract

The invention discloses a centrifugal jig with back-up protection, comprising a front clamp, a rear clamp and a lead screw, a protective sliding rod assembly is arranged between the front clamp and the rear clamp, and the protective sliding rod assembly includes an outer sleeve and an inner sliding rod. The outer sleeve and the inner sliding rod can slide relatively, and the inner sliding rod is limited in the outer sleeve by a limiting device. The centrifugal fixture has a backup protection function, which can prevent the breakage of the insulator string after the lead screw breaks or falls off accidentally, has a high safety factor, and avoids serious personal safety accidents or grid equipment accidents.

Description

A Centrifugal Fixture with Backup Protection

technical field

The invention relates to an insulator replacement tool, in particular to a centrifugal jig with backup protection.

Background technique

Centrifugal fixture is a metal fixture used to replace monolithic glass or porcelain insulators in the maintenance of power transmission lines. It includes front and rear clamps for installing insulators. When the insulator is to be replaced, only the front card and the rear card need to be clamped on the two insulator steel caps at the front and rear of the insulator to be replaced, and the lead screw will transfer the load on the insulator to be replaced to the centrifugal card, thereby replacing the insulator.

At present, when the existing centrifugal card is used in the process of replacing insulators, due to the large load borne by the insulator string, the centrifugal card must also carry a relatively large load, and the operator is laborious to replace the insulators, and the operation is difficult. When the lead screw accidentally breaks or the lead screw falls off due to improper operation, the insulator string breaks and the wire falls off, which will cause serious personal safety accidents and grid equipment accidents.

Contents of the invention

In order to solve the above technical problems, the present invention discloses a centrifugal clamp with backup protection. The centrifugal clamp has a backup protection function, which can prevent the breakage of the insulator after the lead screw breaks or falls off accidentally, has a high safety factor, and avoids serious personal injuries. Safety accidents or power grid equipment accidents.

The present invention realizes through following technical scheme:

A centrifugal jig with back-up protection, comprising a front clamp, a rear clamp and a lead screw, a protective slide rod assembly is provided between the front clamp and the rear clamp, and the protection slide rod assembly includes an outer sleeve and an inner slide rod, the outer sleeve and the inner sleeve The sliding rod can slide relatively, and the inner sliding rod is limited in the outer casing by a limiting device.

Due to the existing centrifugal card in the process of replacing insulators, the insulator string bears a large load, and the centrifugal card also bears a large load. When the screw breaks accidentally or the screw falls off due to improper operation, the insulator string breaks and the wire falls off. , will cause serious personal safety accidents and grid equipment accidents.

In the present invention, a protective sliding rod assembly is arranged between the front clamp and the rear clamp, so that the outer sleeve and the inner sliding rod in the protective sliding rod assembly can slide relative to each other without detaching from each other, thereby producing a backup protection effect on the centrifugal clamp. When the lead screw rotates and the distance between the front clamp and the rear clamp increases or decreases, the outer sleeve and the inner sliding rod will slide relative to each other to adapt to the change of the distance between the front clamp and the rear clamp. When the screw in the centrifugal clamp When the insulator cannot withstand the load of the insulator and breaks or falls off, the inner sliding rod and the outer sleeve in the protective sliding rod assembly slide to the limit, and the relative position is fixed and limited by the limit device. Even if the screw breaks or falls off, the front and rear clamps still It can rely on the protection of the connection of the sliding rod assembly to avoid the breakage of the insulator string, greatly improve the safety of the operation of replacing the insulator of the centrifugal card, and avoid unnecessary personal safety accidents and electrical equipment accidents.

The end of the outer casing away from the inner sliding rod is fixed on the front card through a front clamping joint, and the end of the inner sliding rod away from the outer sleeve is fixed on the rear clamping through a rear clamping joint. The limiting device is arranged on the inner sliding rod.

The limiting device is an adjusting knob, which is ring-shaped and sleeved on the inner sliding rod, and the adjusting knob is connected with the inner sliding rod through thick threads.

The outer diameter of the adjustment knob is the same as the inner diameter of the bar-shaped chute section of the outer sleeve, and the inner diameter of the outer sleeve connecting one end of the inner sliding rod to the bar-shaped chute is smaller than the inner diameter of the bar-shaped chute section of the outer sleeve.

In the present invention, the position of the adjusting knob on the inner sliding rod can be adjusted, and the use of thick threads can increase the efficiency of its adjustment. The adjusted adjusting knob and the inner sliding rod can slide freely in the outer casing of the bar-shaped chute section, which is beneficial to the protection The sliding rod assembly makes corresponding changes with the tightening or loosening of the lead screw. When the inner sliding rod with the adjustment knob slides to the lowest end of the bar-shaped chute, since the inner diameter from the end of the outer sleeve connected to the inner sliding rod to the bar-shaped chute is smaller than the inner diameter of the outer sleeve with the bar-shaped chute section, the adjustment knob It will be limited in the outer casing at the bottom of the bar-shaped chute to prevent the inner sliding rod from slipping out of the outer casing, ensuring the reliability of the protection sliding rod assembly and realizing its backup protection function.

Further, a limiting block is provided at the end of the inner sliding rod, and the limiting block is partially placed in the bar-shaped sliding groove. The limit block is set at the end of the inner sliding rod. When the adjustment knob is difficult to bear the stress and is damaged, the inner sliding rod can also be limited in the outer sleeve by the limit block, so that the two will not be separated, which further improves the safety and protection of the sliding rod assembly. reliability.

The bar-shaped chute can not only cooperate with the limit block to further improve the reliability of the protection slide rod assembly, but also can use fingers to rotate the adjustment knob exposed at the bar-shaped chute.

In the present invention, the adjusting knob can not only be used to limit the inner sliding rod in the outer sleeve, but also can adjust its relative position on the inner sliding rod. The inner sliding rod will rapidly slide out to the bottom of the bar-shaped chute in the direction away from the outer casing, and the sliding distance is the distance from the adjustment knob to the bottom of the bar-shaped chute. The greater the speed at the bottom of the chute, the greater the impact on the adjustment knob. If the impact force is too large, the adjustment knob may be damaged, reducing the safety of protecting the slide rod assembly. The adjustment knob of the present invention uses coarse threads to adjust its position on the inner sliding rod. When the screw accidentally breaks or falls off, since the sliding distance of the inner sliding rod in the protection sliding rod assembly can be adjusted, the protection sliding rod assembly is guaranteed to follow the lead screw. While retracting and retracting to make a corresponding slide, it can effectively reduce the impact on the adjustment knob when the lead screw breaks or falls off, improves the reliability of protecting the sliding rod assembly, and prolongs its service life.

There are two protective sliding rod assemblies, which are respectively arranged on the left and right sides of the front card and parallel to the lead screw.

The lead screw is connected with the front card and the rear card through a screw joint, and the end of the screw joint is provided with a self-locking device at the end connected with the lead screw, and the end of the lead screw joint with the lead screw is provided with a The positioning device matched with the self-locking device automatically locks the lead screw joint in the lead screw through the self-locking device and the positioning device.

The reason why the safety factor of the existing centrifugal card is not high is that the lead screw is easy to break and fall off during the insulator replacement process. Due to the large load borne by the insulator string, when the insulator is loose, the centrifugal card also needs to bear the full load before the insulator is loose. When the lead screw crank makes the lead screw and the lead screw joint gradually separated, the lead screw and the lead screw joint are easy to fall off, causing the insulator to break and the wire to fall off.

Because the front card and the rear card of the centrifugal card are mass-produced in advance according to the specifications of the insulator, their structure, strength and stability are good, and it is not easy to be deformed or broken during the replacement of the insulator, and the screw and the screw joint themselves It has a certain strength and is not easy to break. However, in the process of replacing the insulator, it is necessary to turn the crank handle of the screw to make the screw rotate relative to the screw joint to adjust the distance between the front card and the rear card, which is convenient for insulator replacement, and the screw and the screw joint are connected by threads. The thread needs to bear a certain load. When the lead screw and the lead screw joint are about to separate, it is easy to cause the lead screw to detach from the lead screw joint because the thread cannot bear the stress.

The inventor of the present application has provided a self-locking device placed at the end of the lead screw joint and a positioning device located at the end of the lead screw at the joint between the lead screw and the lead screw joint. When the rod joint is separated, the self-locking device on the lead screw joint is automatically locked in the positioning device of the lead screw. Therefore, in the connection between the lead screw and the lead screw joint, not only the thread bears the stress caused by the weight of the insulator, but also through the self-locking device and the screw joint. The positioning device bears the stress, greatly improves the reliability of the connection between the screw and the screw joint, protects the connection between the screw and the screw joint, and prevents the screw from falling off during the replacement of the insulator, resulting in the breakage of the insulator string and the wire falling off . The safety hazard of the centrifugal fixture can be significantly reduced, the safety of insulator replacement can be improved, and it is suitable for wide promotion.

The self-locking device includes an elastic device and a ball, two balls are fixed at both ends of the elastic device, a radial through hole is provided on the screw joint, and a sleeve is arranged transversely in the through hole. The elastic device and the ball are arranged in the casing, and a limit sleeve is connected to each side of the elastic device, and the limit sleeve is set on the outer periphery of the elastic device, and the middle part of the inner wall of the limit sleeve is fixed on both ends of the elastic device .

The positioning device is two positioning grooves, the positioning grooves are arranged on the inner wall of the lead screw, and the positioning grooves include a groove end for positioning and a groove for the ball to slide in or out of the groove end tail.

The self-locking device in the present invention is mainly an elastic device and a ball. When the screw is tightened, the end of the screw joint is placed at the bottom of the screw hole. At this time, the elastic device is in a compressed state, and both the elastic device and the ball are in the casing. , when the screw rotates, the screw joint rotates outward relative to the screw slot, and when the self-locking device on the screw joint rotates to the tail of the positioning groove, the elastic device starts to extend to both sides, and the ball starts to Stretch out of the bushing, twist the lead screw, the lead screw joint continues to rotate outward relative to the lead screw, the elastic device continues to stretch on both sides, and finally presses the balls at both ends into the groove end of the positioning groove. The positioning sleeve is stretched with the elastic device. One end of the limiting sleeve is placed in the sleeve, and the other end is placed in the positioning groove, so that the screw joint is locked in the screw. At this time, the screw can no longer be twisted to prevent the screw from twisting. Disengage from screw connector.

At the same time, the limit sleeve of the present invention ensures that when the ball is completely sunk into the end of the groove, one end of the limit sleeve is placed in the sleeve, and the other end is placed at the end of the groove, ensuring that there is no gap between the self-locking device and the positioning device. The effective connection realizes the self-locking function.

When the distance between the front card and the rear card of the centrifugal card needs to be tightened, reversely rotate the screw, the screw joint rotates inward relative to the screw slot, and the ball goes along the end of the groove to the tail of the groove The path gradually slides out, the elastic device is gradually compressed, and finally the self-locking device completely slides out of the positioning device, and the elastic device and the ball are re-compressed in the casing. On the basis of ensuring that the lead screw can be rotated and adjusted in two directions, it is ensured that the lead screw does not fall off from the lead screw joint, and the safety of insulator replacement is improved.

The side wall near the outer side of the lead screw at the end of the groove is perpendicular to the inner wall of the lead screw, the side wall at the end of the groove away from the outer side of the lead screw is a smooth arc surface, the inner wall of the tail of the groove is an arc surface, and the tail of the groove goes toward It is consistent with the direction of the thread, and the depth of the positioning groove gradually decreases from the end of the groove to the end of the tail of the groove.

The side wall of the groove end close to the outer side of the screw is perpendicular to the inner wall of the screw. Compared with making the side wall of the groove end close to the outer side of the screw into an arc surface, it can prevent the ball from continuing to move towards the screw along it. Sliding on the outside can also increase the contact surface between the limit sleeve and the end of the groove, which can prevent the limit sleeve from being worn or deformed due to unbearable stress at the part in contact with the end of the groove, effectively improving the self-locking function. The reliability and durability of the system of devices and positioning devices.

Simultaneously, in the present invention, the contact part between the self-locking device and the positioning device is a ball, the groove end of the positioning groove is a smooth arc surface away from the side wall outside the lead screw, and the inner wall of the tail of the groove is an arc surface, and the arc contact The surface friction coefficient is small, which is conducive to the sliding of the self-locking device relative to the positioning device. The direction of the tail of the groove is consistent with the direction of the thread, and the depth of the positioning groove gradually decreases from the end of the groove to the end of the tail of the groove, which is convenient for the self-locking device to slide into the positioning device and lock in the direction of rotation during the rotation of the screw It is convenient for the self-locking device to slide out of the positioning device along the same path. It achieves the function of easy self-locking and unlocking, which saves time and effort in operation, and is safe and reliable.

Preferably, the elastic device is a spring. Other elastic structures or components with better elastic properties can also be used. So that the self-locking device can effectively perform its self-locking function.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. The present invention is a centrifugal jig with back-up protection. By setting a protective sliding rod assembly between the front clamp and the rear clamp, the outer casing and the inner sliding rod in the protective sliding rod assembly can slide relative to each other without detaching from each other. If the screw In case of accidental breakage or falling off, the front card and the rear card can still be connected by means of the protective sliding rod assembly to avoid breakage of the insulator string, greatly improving the safety of the centrifugal card replacement insulator operation, and avoiding unnecessary personal safety accidents and electrical equipment accidents;

2. A centrifugal jig with backup protection of the present invention, by setting the self-locking device at the end of the screw joint and the positioning device at the end of the screw at the joint between the screw and the screw joint, the screw During the rotation process, when it rotates to the point where it is about to separate from the lead screw joint, the self-locking device on the lead screw joint automatically locks in the positioning device of the lead screw, which greatly improves the reliability of the connection between the lead screw and the lead screw joint, and directly and effectively avoids In order to prevent the lead screw from falling off during the replacement of the insulator, it can significantly reduce the safety hazard of the centrifugal fixture, and is suitable for widespread promotion;

3. A centrifugal jig with backup protection of the present invention, by setting the protection sliding rod assembly, self-locking device and positioning device system, it can not only prevent the lead screw from falling off at the root, but also prevent the front screw from falling off or breaking. The card and the rear card are separated, avoiding the breakage of the insulator string, causing electric safety accidents, and minimizing the potential safety hazard and possible loss caused by insulator replacement.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the present invention, constitute a part of the application, and do not limit the embodiments of the present invention. In the attached picture:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the protection sliding rod assembly of the present invention;

Fig. 3 is a longitudinal sectional view of an outer casing of the present invention;

Fig. 4 is a radial sectional view of an outer sleeve of the present invention;

Fig. 5 is a partial cross-sectional view of place A in Fig. 1 of the present invention;

Fig. 6 is a structural schematic diagram of the self-locking device and the positioning device of the present invention;

Fig. 7 is a schematic diagram of locking the self-locking device in the positioning device of the present invention;

Fig. 8 is a partially expanded view of the inner wall of the screw according to the present invention.

Marks and corresponding parts names in the attached drawings:

1-Front card, 2-Rear card, 3-Lead screw, 31-Thread, 4-Protection slide rod assembly, 5-Outer sleeve, 51-Front card joint, 52-Bar chute, 6-Inner slide rod, 61- Rear card joint, 62-adjusting knob, 63-limiting block, 7-screw joint, 8-self-locking device, 81-elastic device, 82-ball, 83-sleeve, 84-limiting sleeve, 9 - positioning means, 91 - groove end, 92 - groove tail.

detailed description

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

Example

As shown in Figures 1 to 8, the present invention is a centrifugal jig with backup protection, including a front clamp 1, a rear clamp 2 and a screw 3, and a protective sliding rod assembly 4 is provided between the front clamp 1 and the rear clamp 2, The protective sliding rod assembly 4 includes an outer sleeve 5 and an inner sliding rod 6 , the outer sleeve 5 and the inner sliding rod 6 can slide relative to each other, and the inner sliding rod 6 is limited in the outer sleeve 5 by a limiting device.

The end of the outer sleeve 5 away from the inner sliding rod 6 is fixed on the front card 1 through a front clamping joint 51, and the end of the inner sliding rod 6 away from the outer sleeve 5 is clamped on the rear through a rear clamping joint 61, and on the outer sleeve 5 A bar-shaped sliding slot 52 is provided, and the limiting device is arranged on the inner sliding rod 6 .

The limiting device is an adjusting knob 62 , which is ring-shaped and sleeved on the inner sliding rod 6 , and the adjusting knob 62 is connected with the inner sliding rod 6 through thick threads.

The outer diameter of the adjustment knob 62 is the same as the inner diameter of the bar-shaped chute 52 section of the outer sleeve 5, and the inner diameter of the outer sleeve 5 connected to the inner sliding rod 6 to the bar-shaped chute 52 is smaller than the inner diameter of the outer sleeve 5 with the bar-shaped slide. The inner diameter of the slot 52 segment.

A limiting block 63 is provided at the end of the inner sliding rod 6 , and a part of the limiting block 63 is placed in the bar-shaped sliding groove 52 .

There are two protective sliding rod assemblies 4 , which are respectively arranged on the left and right sides of the front card 1 and parallel to the lead screw 3 .

The lead screw 3 is connected with the front card 1 and the rear card 2 through the screw joint 7, and the end of the screw joint 7 connected with the lead screw 3 is provided with a self-locking device 8, and the lead screw 3 is connected to the lead screw. The end of the connection of the joint 7 is provided with a positioning device 9 matching the self-locking device 8 , and the screw joint 7 is automatically locked in the lead screw 3 through the self-locking device 8 and the positioning device 9 .

Described self-locking device 8 comprises elastic device 81 and spherical ball 82, and spherical ball 82 is two and is fixed on the two ends of elastic device 81, and described screw joint 7 is provided with a radial through hole, and the transverse direction in through hole A sleeve 83 is provided, the elastic device 81 and the ball 82 are arranged in the sleeve 83, a limit sleeve 84 is connected to each side of the elastic device 81, and the limit sleeve 84 is sleeved on the elastic device 81 The outer periphery and the middle part of the inner wall of the limit sleeve 84 are fixed to both ends of the elastic device 81 .

The positioning device 9 is two positioning grooves, the positioning grooves are arranged on the inner wall of the screw 3, and the positioning grooves include a groove end 91 for positioning and a groove end that is convenient for the ball 82 to slide in or out of the groove. Groove tail 92 of part 91.

The side wall near the outer side of the lead screw 3 of the groove end 91 is perpendicular to the inner wall of the lead screw 3, the side wall of the groove end 91 away from the outer side of the lead screw 3 is a smooth arc surface, and the inner wall of the groove tail 92 is an arc. On the surface, the direction of the groove tail 92 is consistent with the direction of the inner wall thread 31 of the lead screw 3, and the depth of the positioning groove gradually decreases from the groove end 91 to the groove tail 92 end.

Preferably, the elastic device 81 is a spring.

When utilizing the centrifugal fixture of the present invention to replace the insulator, since the connecting part of the lead screw 3 and the lead screw joint 7 is provided with a self-locking device 8 and a positioning device 9, the stability of the connection between the lead screw 3 and the lead screw joint 7 is high, and the lead screw Not easy to fall off. When the screw 3 is rotated to adjust the distance between the front card and the rear card to replace the insulator, the inner slide rod 6 of the protection slide rod assembly 4 will slide up and down in the outer sleeve 5 to adapt to the distance between the front card 1 and the rear card 2. Change, when the lead screw breaks accidentally, the inner sliding rod 6 quickly slides in the direction of sliding out of the outer casing 5, and finally the inner sliding rod 6 is confined in the outer casing 5 by adjusting the knob 62, so as to avoid safety accidents caused by insulator string breakage.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. A centrifugal fixture with back-up protection, comprising front clamp (1), rear clamp (2) and leading screw (3), it is characterized in that, the described front clamp (1) and rear clamp (2) are provided with There is a protective sliding rod assembly (4), the protective sliding rod assembly (4) includes an outer sleeve (5) and an inner sliding rod (6), the outer sleeve (5) and the inner sliding rod (6) can slide relatively, and the inner sliding rod (6) It is limited within the outer sleeve (5) by a limiting device. 2. A centrifugal jig with backup protection according to claim 1, characterized in that the end of the outer casing (5) away from the inner sliding rod (6) is fixed on the front clamp (51) through a front clamp joint (51) 1), the end of the inner sliding rod (6) away from the outer casing (5) is connected to the rear card (2) through a rear card joint (61), and a strip chute (52) is provided on the outer casing (5) ), the limiting device is arranged on the inner sliding rod (6). 3. A centrifugal fixture with backup protection according to claim 2, characterized in that, the limit device is an adjustment knob (62), which is ring-shaped and sleeved on the inner sliding rod (6 ), the adjusting knob (62) is connected with the inner sliding rod (6) through coarse threads. 4. A kind of centrifugal gripper with back-up protection according to claim 3, characterized in that, the outer diameter of the adjustment knob (62) is the same as the inner diameter of the strip chute (52) section of the outer casing (5) , the inner diameter of the outer sleeve (5) connected to the inner sliding rod (6) at one end to the bar-shaped chute (52) is smaller than the inner diameter of the bar-shaped chute (52) section of the outer sleeve (5). 5. A centrifugal fixture with backup protection according to any one of claims 1 to 4, characterized in that a limit block (63) is provided at the end of the inner sliding rod (6), and the limit block (63) The bit block (63) is partially placed in the bar chute (52). 6. A centrifugal fixture with backup protection according to claim 5, characterized in that there are two protective slide rod assemblies (4), which are respectively arranged on the left and right sides of the front clamp (1) and connected with the wire Bar (3) is parallel. 7. A centrifugal clamp with backup protection according to any one of claims 1 to 4, characterized in that, the lead screw (3) passes through the front clamp (1) and the rear clamp (2). The lead screw joint (7) is connected, and the end of the lead screw joint (7) connected with the lead screw (3) is provided with a self-locking device (8), and the lead screw (3) is connected with the lead screw joint (7). A positioning device (9) matching the self-locking device (8) is provided at the end of the position, and the screw joint (7) is automatically locked in the lead screw (3) by the self-locking device (8) and the positioning device (9). 8. A kind of centrifugal chuck with back-up protection according to claim 7, characterized in that, the self-locking device (8) comprises an elastic device (81) and a ball (82), and the ball (82) is Two and fixed on the two ends of the elastic device (81), the screw joint (7) is provided with a radial through hole, and a sleeve (83) is arranged transversely in the through hole, and the elastic device (81) And the ball (82) is located in the casing (83), and a limit sleeve (84) is respectively connected to both sides of the elastic device (81), and the limit sleeve (84) is sleeved on the elastic device (81). ) outer periphery, and the middle part of the inner wall of the limit sleeve (84) is fixed on the two ends of the elastic device (81). 9. A kind of centrifugal chuck with back-up protection according to claim 8, characterized in that, the positioning device (9) is two positioning grooves, and the positioning grooves are arranged on the inner wall of the lead screw (3), so that The positioning groove includes a groove end (91) for positioning and a groove tail (92) for facilitating the ball (82) to slide in or out of the groove end (91). 10. The self-locking centrifugal clamp according to claim 9, characterized in that, the side wall near the outer side of the lead screw (3) at the end of the groove (91) is perpendicular to the inner wall of the lead screw (3), and the groove The side wall of the end (91) away from the outer side of the lead screw (3) is a smooth arc surface, the inner wall of the groove tail (92) is an arc surface, and the direction of the groove tail (92) is consistent with the direction of the thread (31), and The depth of the positioning groove gradually decreases from the end of the groove (91) to the end of the tail of the groove (92).