CN120691266A - A combined multi-purpose insulating temporary crossarm - Google Patents

Abstract

The application discloses a combined multipurpose insulating temporary cross arm, which relates to the field of maintenance and replacement of distribution circuit devices, and comprises a base and a supporting rod, wherein the base is fixedly connected with an insulating cross rod, the base is fixed on a concrete rod through a chain type anchor ear, two ratchet wire tighteners are arranged on the insulating cross rod and are arranged in a mirror image mode relative to the center of the supporting rod, two ends of the insulating cross rod are also provided with main supporting rods, a lifting rope is arranged on each ratchet wire tightener, the other end of each lifting rope is provided with a hook for hanging a wire, the main supporting rods are rotatably connected with pulleys, and the lifting rope is erected on the pulleys.

Description

Combined multipurpose insulating temporary cross arm

Technical Field

The invention relates to the field of maintenance and replacement of distribution line devices, in particular to a combined multipurpose insulating temporary cross arm.

Background

The overhead line is widely applied to a power distribution network, wherein most of urban overhead lines are arranged by double-circuit wires, and live working is an important mode for replacing aged and damaged 10kV (including 0.4kV lines) straight line rod cross arms or insulators. The insulating temporary cross arm plays a role in temporarily supporting the wires in the operation, wherein basic working steps of live replacement of the linear rod cross arm and the insulator are mounting insulating shielding measures, transferring two-side phase wires, removing an old linear rod cross arm (insulator), mounting a new linear rod cross arm (insulator), transferring four wires and removing the insulating shielding measures, and an operator can complete the operation through operating the insulating arm up and down for many times, so that the operation steps are complicated.

The traditional insulating temporary cross arm still has a large optimization space, and is simple in structure, large in weight, complex in installation and disassembly processes and time-consuming, and most of design schemes cannot operate in double loops at the same time, so that large physical burden is brought to operators, and the operation efficiency is affected. Fourth, independent small parts are more, and the risk of falling objects in high altitude is increased.

The conventional common insulating temporary cross arm adopts a linear structure as shown in fig. 1, and is fixed on a cement electric pole by using a tool when in use, a wire is temporarily supported in a clamping fixture, and the space between the clamping fixtures can be flexibly adjusted by using a bolt screw. However, this design relies on "bolts" for fixation, increasing the risk of falling objects during aloft work. In addition, the tool can only temporarily support the wires on the same side of the electric pole, can not simultaneously support the double-circuit line, so that the repeated labor is prolonged during double-circuit operation, the linear structure is not enough in stability in heavy load and severe environment, and meanwhile, in the wire transferring process, the lifting of the wires is required to be mechanically lifted by the aid of the small suspension arm of the insulating bucket, so that the dependence on an external power supply is high.

Disclosure of Invention

The application aims to provide a combined multipurpose insulating temporary cross arm which has the advantages of supporting double-circuit lines, reducing operation complexity, improving operation stability and reducing risk of high-altitude falling objects.

The application provides a combined multipurpose insulating temporary cross arm, which adopts the following technical scheme:

A combined multipurpose insulating temporary cross arm comprises a base and a supporting rod, wherein the base is fixedly connected with the insulating cross rod, the base is fixed on a concrete rod through a chain type hoop, two ratchet wheel tighteners are arranged on the insulating cross rod and are arranged in a mirror image mode relative to the center of the supporting rod, two ends of the insulating cross rod are respectively provided with a main supporting rod, a lifting rope is arranged on each ratchet wheel tightener, a hook for hanging a wire is arranged at the other end of each lifting rope, pulleys are rotatably connected to the main supporting rods, and the lifting ropes are erected on the pulleys.

Optionally, the main support bar and the insulating cross bar form a trapezoid structure.

Optionally, two auxiliary supporting rods are further arranged at the middle section of the insulating cross rod, the auxiliary supporting rods are located between the main supporting rods and the ratchet wire tightener, pulleys are also arranged on the auxiliary supporting rods, the ratchet wire tightener is a double-layer wire tightener, two lifting ropes are connected, one lifting rope is erected on the pulleys of the main supporting rods, and the other lifting rope is erected on the lifting rope of the auxiliary supporting rods.

Optionally, the auxiliary supporting rod is rotatably connected to the insulating cross rod, the rotation axes of the auxiliary supporting rod are the same along the thickness direction of the insulating cross rod, and the insulating cross rod is further provided with a limiting assembly for limiting the rotation of the auxiliary supporting rod.

Optionally, an installation seat is arranged on the insulating cross rod, the auxiliary support rod is rotatably connected to the installation seat through a rotating shaft, the limiting assembly comprises a clamping block, the clamping block is slidably connected to the auxiliary support rod along the thickness direction of the insulating cross rod, and a plurality of limiting holes for the clamping block to slide for insertion are formed in the installation seat along the circumferential direction of the rotating shaft.

Optionally, two clamping blocks are arranged on two sides of the auxiliary supporting rod respectively, a spring is arranged between the two clamping blocks, and when the spring is in a natural state, the clamping blocks are inserted into the limiting holes.

According to the combined type multipurpose insulating temporary cross arm, the trapezoid structure and the limiting assembly thereof, double-circuit line synchronous operation is achieved through the double-ratchet tightener and the trapezoid supporting structure which are arranged in a mirror image mode, the adjustable limiting assembly and the pulley system are combined, the installation process is simplified, the stability is improved, the problems that the traditional insulating cross arm is complex in operation, insufficient in stability and high in risk of falling objects at high altitude are effectively solved, and the combined type multipurpose insulating temporary cross arm has the advantages that double-circuit lines can be supported simultaneously, the operation complexity is reduced, the operation stability is improved, and the risk of falling objects at high altitude is reduced.

Drawings

FIG. 1 is a view of a combined multipurpose insulating temporary cross arm of the present application in use;

FIG. 2 is an overall block diagram of the temporary cross arm of FIG. 1;

FIG. 3 is an overall construction view of the auxiliary supporting rod of FIG. 1;

fig. 4 is an overall cross-sectional view of the structure of fig. 3.

Reference numerals illustrate:

1.The cable comprises a concrete pole, a base, a 21, an abutting block, a 22, a chain anchor ear, a 3, an insulating cross rod, a 4, a main support rod, a5, an auxiliary support rod, a 51, a mounting seat, a52, a rotating shaft, a 53, a clamping block, a 54, a limiting hole, a 55, a spring, a 6, a ratchet wheel wire tightener, a 7, a lifting rope, an 8, a pulley, a 9 and a wire.

Detailed Description

The application is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses a combined multipurpose insulating temporary cross arm, wherein a base 2 is fixedly connected with an insulating cross rod 3 and is fixed on a concrete pole 1 through a chain type hoop 22, the insulating cross rod 3 is provided with ratchet wire tighteners 6 which are arranged in a mirror image mode, two ends of each ratchet wire tightener are provided with a main supporting rod 4, the ratchet wire tighteners 6 are connected with a lifting rope 7 with a hook, and pulleys 8 are arranged on the main supporting rods 4 and used for guiding the lifting rope 7 to move.

The chain type anchor ear 22 is an annular fixing device composed of a plurality of chain links, and can be realized by matching metal chain links with lock catches, and the number of the chain links is adjusted to adapt to concrete rods 1 with different diameters, so that the risk of falling off of parts in high-altitude operation is reduced by replacing the traditional bolt connection mode.

The ratchet tightener 6 is a tension adjusting device with a self-locking function, and particularly can adopt a gear and pawl matching structure, the length adjustment of the lifting rope 7 is realized through handle operation, and the double-loop lead 9 is balanced in stress by mirror image arrangement.

The main supporting rod 4 is a bearing component perpendicular to the insulating cross rod 3, and can be made of an insulating composite material, and forms a trapezoid frame structure with the insulating cross rod 3, so that the integral bending strength is enhanced.

The pulley 8 is a rotating wheel body with grooves, and specifically, a nylon bearing structure can be adopted, so that smooth movement can be realized by reducing friction resistance of the lifting rope 7.

The lifting rope 7 is a flexible traction piece for bearing the weight of the lead 9, and can be a torsion-proof steel wire rope or a high-strength nylon rope, and the tail end of the lifting rope is connected with a metal hook for fixing the lead 9.

Specifically, during installation, the chain type anchor ear 22 is closed and locked around the concrete pole 1 to form a reliable fixed point, meanwhile, in order to increase friction force and facilitate leveling, two abutting blocks 21 are further arranged on the base 2, an operator rotates the handles of the ratchet tightener 6 at two sides simultaneously to drive the lifting rope 7 to lift through the pulley 8 at the top of the main supporting pole 4, and the hook pulls the lead 9 to a preset height. The bending moment generated by the load of the lead 9 is dispersed by the trapezoid frame structure, and the mirror symmetry ratchet system ensures that the double-loop lead 9 is lifted synchronously, so that the tool inclination caused by single-side stress is avoided. The lifting rope 7 moves along the vertical direction under the guidance of the pulley 8, so that positioning deviation caused by transverse swing is reduced, after the wire 9 is lifted, the existing insulating cross arm is removed, and after the running insulating cross arm is replaced, the lifting rope 7 is operated by the ratchet tightener 6, so that the wire 9 is lowered onto a new insulating cross arm.

Compared with the prior art, the traditional scheme adopts bolts to fasten parts with various specifications, the chain type anchor ear 22 is high in adaptability through chain links and free from small part falling risks, single-side supports of existing tools are required to be detached and installed repeatedly, double-side synchronous operation of the scheme is reduced by 50% operation steps, a straight-line structural cross arm is easy to be unstable when the lead 9 is deviated, the ladder-shaped frame of the scheme improves lateral load resistance, the traditional lead 9 is lifted and lowered, and independent control is realized by an external suspension arm through an integrated ratchet mechanism.

According to the technical scheme, synchronous transfer of the double-circuit line lead 9 is realized, repeated operation steps are eliminated, the high-altitude falling risk is reduced by a flexible fixing mode, the reliable support under a severe environment is ensured by the enhanced structural stability, and the dependence on external equipment is reduced by the built-in lifting mechanism, so that the live working flow is safer and more efficient.

The application further provides a technical scheme that the main supporting rod 4 and the insulating cross rod 3 form a trapezoid structure.

The trapezoid structure is a quadrilateral frame formed by two main supporting rods 4 which are obliquely arranged and a horizontal insulating cross rod 3, and particularly can be realized by adopting a mode that the lower ends of the main supporting rods 4 are welded and fixed with the two ends of the insulating cross rod 3, and the upper ends of the main supporting rods extend outwards in an inclined manner. The structure forms a geometric stable system through inclined struts which are symmetrically distributed on two sides, and the inclination angle of the structure can be controlled between 30 and 60 degrees, for example, 45 degrees.

In particular, the oblique connection of the main supporting rod 4 with the insulating crossbar 3 forms a trapezoidal frame with a triangular supporting effect. When the wire 9 is suspended from the hanger, vertical load is transferred to the main support bar 4 through the hoist rope 7, and the obliquely arranged main support bar 4 breaks down vertical force into axial pressure and lateral support force. The transverse supporting forces are offset by the symmetrical arrangement of the trapezoid frames, so that the insulating cross rod 3 is effectively prevented from lateral bending deformation. When double-circuit lines are operated, the trapezoidal structures which are symmetrically distributed on two sides can simultaneously bear the composite load of two groups of wires 9, and the rigidity of the frame can resist the horizontal moment generated by the swinging of the wires 9, so that the overall stability of the support system is maintained.

Compared with the prior art, the cross arm with the traditional linear structure only depends on the vertical supporting rod to bear load, and single-side moment is easy to generate when the double-circuit wires 9 work simultaneously, so that the structure is unstable. The trapezoid structure converts lateral force generated by the suspension point of the lead 9 into internal stress of the frame through couple action formed by the oblique support rods, so that torsion or inclination of the support system is avoided, and the lateral movement resistance of the structure is remarkably improved.

Through the technical scheme, the defect of stability of the traditional linear structure in double-circuit operation is effectively overcome, the symmetrical supporting characteristic of the trapezoid frame enables the temporary cross arm to simultaneously bear the composite load of two groups of wires 9 without structural deformation, the geometric stability of the temporary cross arm enhances the wind load resistance of the supporting system under severe weather conditions, and meanwhile, the temporary cross arm adapts to the operation requirement of symmetrical distribution of urban double-circuit lines, and the position adjustment time of the wires 9 during transfer is obviously shortened.

The application further provides that the middle section of the insulating cross rod 3 is also provided with two auxiliary supporting rods 5, the auxiliary supporting rods 5 are positioned between the main supporting rods 4 and the ratchet tightener 6, the auxiliary supporting rods 5 are also provided with pulleys 8, the ratchet tightener 6 is a double-layer tightener, two lifting ropes 7 are connected, one lifting rope 7 is erected on the pulleys 8 of the main supporting rods 4, and the other lifting rope 7 is erected on the lifting ropes 7 of the auxiliary supporting rods 5.

The auxiliary supporting rod 5 is an auxiliary supporting structure arranged at the middle section of the insulating cross rod 3 and positioned between the main supporting rod 4 and the ratchet tightener 6, and can be specifically realized in a mode of hinging a metal rod piece with the insulating cross rod 3 and is used for dispersing the load of the conducting wire 9 and enhancing the bending rigidity of the insulating cross rod 3. The double-layer tightener is a ratchet device with two independent winding units, and can be realized by adopting a coaxial double-winding drum structure, and the two winding drums are synchronously operated to respectively control the winding and unwinding of the two lifting ropes 7, so that the independent adjustment of the double-circuit line wires 9 is realized. The pulley 8 of the auxiliary supporting rod 5 is a guide wheel mounted at the top end of the auxiliary supporting rod 5, and specifically, a pulley 8 structure made of nylon and provided with grooves can be used for changing the traction direction of the second lifting rope 7 so that the second lifting rope and the lifting rope 7 of the main supporting rod 4 form space dislocation arrangement.

Specifically, when the double-layer tightener is operated, the first hoist rope 7 vertically pulls the single-side wire 9 through the pulley 8 of the main support rod 4, the second hoist rope 7 forms an inclined pulling path through the pulley 8 of the auxiliary support rod 5, and the working areas of the two hoist ropes 7 are spatially separated. The main supporting rod 4 and the auxiliary supporting rod 5 form a trapezoid supporting frame together, and bending moment at the middle section of the insulating cross rod 3 is decomposed by the two supporting rods and transmitted to the base 2. In double-circuit line operation, two reels of double-layer turn-buckle can independent control corresponding lifting rope 7, make two sets of wires 9 go up and down and do not interfere each other in step. The pulley 8 system of the auxiliary supporting rod 5 prevents the double lifting ropes 7 from interfering in the same plane of the insulating cross rod 3 by changing the stress direction of the second lifting ropes 7, and simultaneously prevents the falling risk of the lead 9 caused by single-point failure through the redundant supporting structure.

Compared with the prior art, the traditional insulating cross arm only adopts a single-layer tightener and a linear supporting structure, double-circuit line synchronous operation cannot be realized, and the lifting of the lead 9 is dependent on external boom equipment. According to the scheme, the auxiliary supporting rod 5 and the double-layer tightener are additionally arranged, so that a single device can simultaneously control two groups of lifting ropes 7, and the operation range covers the space area required by the double-circuit line. Compared with a straight line structure, the trapezoid support frame remarkably improves bending resistance, tool positions do not need to be frequently adjusted in the transfer process of the lead 9, and operation interruption times are reduced.

Through the technical scheme, the synchronous independent adjustment of the double-circuit line wires 9 can be realized, and the operation steps of transferring the device for many times or relying on external equipment in the traditional operation are eliminated. The double support rod structure reduces the risk of high-altitude falling objects by reducing the use of independent fasteners while improving the load distribution uniformity. The cooperation of double-deck turn-buckle and double-pulley 8 system makes wire 9 traction path form the space separation, avoids double-sling 7 winding risk, ensures double-circuit line operation's continuity and security.

The application further provides that the auxiliary supporting rod 5 is rotatably connected to the insulating cross rod 3, the rotation axes of the auxiliary supporting rod are the same along the thickness direction of the insulating cross rod 3, and the insulating cross rod 3 is also provided with a limiting component for limiting the rotation of the auxiliary supporting rod.

The auxiliary supporting rod 5 is rotatably connected to the insulating cross rod 3, namely, the auxiliary supporting rod 5 is connected to the insulating cross rod 3 through a rotatable structure, specifically, the auxiliary supporting rod can be realized by adopting a mode that a rotating shaft 52 is matched with an installation seat 51, the rotating shaft 52 is fixed on the installation seat 51, and the installation seat 51 is welded or bolted to the surface of the insulating cross rod 3. The rotary connection enables the auxiliary supporting rod 5 to rotate around the axis, so that the supporting angle can be conveniently adjusted according to the operation requirement. The limiting component is a mechanical locking device for fixing the rotation angle of the auxiliary supporting rod 5, and can be specifically realized by adopting a mode that a clamping block 53 is matched with a limiting hole 54, the clamping block 53 is embedded into the limiting hole 54 by the pretightening force of a spring 55, and the clamping block 53 is separated from the limiting hole 54 by sliding so as to release the locking. The assembly replaces the traditional bolt fixing mode, and the use of independent small parts is reduced.

Specifically, the auxiliary supporting rod 5 is connected with the mounting seat 51 through the rotating shaft 52, and can rotate to a target angle according to the position requirement of the lead 9 during operation, and then the auxiliary supporting rod is embedded into the limiting hole 54 through the sliding clamping block 53, so that the angle is fixed. The unified direction design of the rotation axis enables a plurality of auxiliary supporting rods 5 to keep direction consistency during adjustment, and uneven distribution of supporting force caused by axis deviation is avoided. The limiting component realizes the self-locking function through the mechanical cooperation of the spring 55 and the clamping block 53, and can complete the angle locking without additional tools, thereby reducing the steps of disassembling bolts in high-altitude operation.

Compared with the prior art, the supporting rod of the traditional insulating temporary cross arm adopts a bolt fixing mode, the bolts are required to be repeatedly disassembled during adjustment, and the risk that parts fall off and the operation is time-consuming exists. According to the scheme, the supporting rod angle is quickly adjusted and locked through the cooperation of the rotating connection and the limiting assembly, parts are not required to be disassembled, and the risk of high-altitude falling objects is reduced. Meanwhile, compared with the mechanical locking mode of the clamping block 53, the bolt fixing of the limiting hole 54 is more stable, and the problem of angular deviation caused by loosening of the bolt is avoided.

Through the technical scheme, the problem of low efficiency caused by unstable structure in the installation and adjustment process of the auxiliary supporting rod 5 is solved, the number of independent parts is reduced through the integrated limiting design, the risk of part falling off in high-altitude operation is reduced, and meanwhile, the convenience and reliability of supporting rod angle adjustment are improved.

The application further provides that the insulating cross rod 3 is provided with the mounting seat 51, the auxiliary support rod 5 is rotatably connected to the mounting seat 51 through the rotating shaft 52, the limiting component comprises a clamping block 53, the clamping block 53 is slidably connected to the auxiliary support rod 5 along the thickness direction of the insulating cross rod 3, and the mounting seat 51 is provided with a plurality of limiting holes 54 for the clamping block 53 to slide to insert along the circumferential direction of the rotating shaft 52.

The mounting seat 51 is a connection structure fixed on the insulating cross bar 3, and may be implemented by a metal base fixed by welding or bolts, so as to provide a stable rotation pivot for the auxiliary support bar 5. The rotating shaft 52 is a cylindrical connecting piece penetrating through the mounting seat 51 and the auxiliary supporting rod 5, and can be specifically realized by a stainless steel shaft pin, so that the auxiliary supporting rod 5 can freely rotate around an axis. The clamping block 53 is a limiting component with an inserting function, and can be specifically realized by a metal sliding block with a guide groove, and can be separated from or clamped with the limiting hole 54 by transverse sliding. The limiting holes 54 are positioning holes uniformly distributed along the circumferential direction of the rotating shaft 52, and can be realized by circular holes or square holes in an annular array, so that a plurality of fixed angle gears are formed.

Specifically, when the angle of the auxiliary supporting rod 5 needs to be adjusted, the operator slides the clamping block 53 along the thickness direction of the insulating cross rod 3 to withdraw from the current limiting hole 54, and at this time, the auxiliary supporting rod 5 can freely rotate around the rotating shaft 52. When the angle is rotated to the target angle, the clamping block 53 is released to be automatically inserted into the limiting hole 54 at the corresponding position under the action of the sliding mechanism, so that the angle fixing is completed. In the process, the clamping block 53 and the limiting hole 54 are matched to realize positioning through mechanical self-locking, and additional fastening operation is not needed. The cooperation of the mounting seat 51 and the rotating shaft 52 ensures the consistency of the line of the rotating shaft 52 and avoids the deflection of the supporting rod. The annular arrangement of the plurality of limiting holes 54 may provide angular adjustment accuracy, for example, 15 ° apart, meeting the needs of different work scenarios.

Compared with the prior art, the traditional insulating cross arm adopts the bolt to fix the angle of the supporting rod, and each time the adjustment is required to be completely loosened the nut and then fastened again, the risk that the part falls exists and the time consumption is longer. According to the scheme, through the mechanical interlocking structure of the sliding clamping block 53 and the limiting hole 54, the quick angle adjustment of one-hand operation is realized, and the use of small parts such as bolts is completely eliminated. The rotary positioning process does not need tool assistance, and the clamping block 53 is always in a connection state with the auxiliary supporting rod 5, so that the hidden danger of falling objects from high altitude is radically eliminated.

Through the technical scheme, the application realizes the rapid stepless adjustment and reliable fixation of the angle of the auxiliary supporting rod 5, does not need to disassemble any part in the operation process, and obviously shortens the overhead working time. The matching structure of the clamping block 53 and the limiting hole 54 has a self-locking and retaining characteristic, so that the support rod cannot rotate accidentally when bearing the load of the lead 9. The whole adjusting mechanism only comprises three main parts, is compact in structure and free of parts which are easy to lose, and effectively reduces operation risks.

The application further provides that two clamping blocks 53 are arranged, the two clamping blocks 53 are respectively arranged on two sides of the auxiliary supporting rod 5, a spring 55 is further arranged between the two clamping blocks 53, and when the spring 55 is in a natural state, the clamping blocks 53 are inserted into the limiting holes 54.

The clamping block 53 is a limiting component for limiting the rotation of the auxiliary supporting rod 5, and specifically may be a metal block structure, and is installed on two sides of the auxiliary supporting rod 5 in a sliding connection manner, and angle locking is achieved by inserting the limiting hole 54. The spring 55 is a connection element for providing elastic force, and specifically, a spiral compression spring 55 may be adopted, where two ends of the spring are respectively connected to the clamping blocks 53 at two sides, and the clamping blocks 53 are pushed to maintain a stable state of being inserted into the limiting holes 54 in a natural state. The limiting holes 54 are positioning hole groups arranged on the mounting seat 51, and can be specifically circular hole structures distributed in an annular array, are circumferentially arranged at intervals along the rotating shaft 52, and are fixed at multiple angles through the cooperation of the clamping blocks 53 and different hole positions.

Specifically, when the auxiliary supporting rod 5 rotates, the clamping blocks 53 on two sides are synchronously embedded into the corresponding limiting holes 54 under the action of the springs 55, so that bidirectional mechanical constraint is formed. When the supporting angle needs to be adjusted, opposite pressure needs to be applied to the clamping blocks 53 at two sides to separate the clamping blocks from the limiting holes 54, and at the moment, the springs 55 are compressed to store energy. After the angle adjustment is completed, the spring 55 releases energy storage to push the clamping block 53 to be automatically embedded into the limiting hole 54 at the new position, so that the self-locking fixation without bolts is realized. The symmetrical arrangement of the double clamping blocks 53 in the process can offset the deflection moment caused by single-side stress, and accidental tripping caused by vibration or load change is avoided.

The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.

Claims (6)

1. A modular multi-purpose insulated temporary crossarm, characterized in that it includes a base and a support rod, the base is fixedly connected to the insulating crossbar, and the base is fixed to the concrete pole by a chain clamp; the insulating crossbar is provided with two ratchet tensioners, and the two ratchet tensioners are arranged in a mirror image with respect to the center of the support rod; both ends of the insulating crossbar are also provided with a main support rod, the ratchet tensioners are provided with a high-strength insulating rope, and the other end of the rope is provided with a hook for hanging the wire; the main support rod is rotatably connected to the pulley, and the rope is mounted on the pulley. 2. A combined multi-purpose insulating temporary cross arm according to claim 1, characterized in that the main support rod and the insulating cross rod form a trapezoidal structure. 3. A combined multi-purpose insulating temporary cross arm according to claim 2, characterized in that: two auxiliary support rods are also provided in the middle section of the insulating cross bar, and the auxiliary support rods are located between the main support rod and the ratchet tensioner; a pulley is also provided on the auxiliary support rod, and the ratchet tensioner is a double-layer tensioner, which is connected to two of the said suspension ropes, one of which is mounted on the pulley of the main support rod, and the other suspension rope is mounted on the suspension rope of the auxiliary support rod. 4. A combined multi-purpose insulating temporary cross arm according to claim 1, characterized in that: the auxiliary support rod is rotatably connected to the insulating cross bar, and its rotation axis is in the same direction along the thickness of the insulating cross bar; the insulating cross bar is also provided with a limit assembly for limiting its rotation. 5. A combined multi-purpose insulating temporary cross arm according to claim 4, characterized in that: a mounting seat is provided on the insulating cross bar, and the secondary support rod is rotatably connected to the mounting seat through a rotating shaft; the limiting assembly includes a card block, which is slidably connected to the secondary support rod along the thickness direction of the insulating cross bar, and a plurality of limiting holes are opened on the mounting seat along the circumferential direction of the rotating shaft for the card block to slide and insert. 6. A combined multi-purpose insulating temporary crossarm according to claim 1, characterized in that: there are two clamping blocks, which are respectively arranged on both sides of the auxiliary support rod, and a spring is provided between the two clamping blocks; when the spring is in a natural state, the clamping block is inserted into the limiting hole.