CN212712404U - Multifunctional height-adjustable portal frame for electric power construction - Google Patents

Abstract

The utility model relates to a technical field of many functions portal frame, a portal frame with adjustable many functions height for electric power construction is disclosed, it includes the base, the base has two, the base is kept away from ground one end and is articulated to have supporting mechanism, supporting mechanism is connected with stop gear, stop gear keeps away from supporting mechanism one end and base fixed connection, supporting mechanism keeps away from base one end and rotates and be connected with the crossbeam, the first hoist mechanism of crossbeam intermediate position fixedly connected with, first hoist mechanism is including lifting unit and drive assembly, lifting unit and crossbeam fixed connection, drive assembly connects the one end at crossbeam length direction, the base is connected with the first hoist mechanism of second. The supporting mechanism is hinged to the base, the supporting mechanism can rotate relative to the base, when the portal frame is installed, connection between the limiting mechanism and the base is disconnected, and an included angle between the supporting mechanism and the base is in a small state.

Description

Multifunctional height-adjustable portal frame for electric power construction

Technical Field

The application relates to the field of multifunctional portal frames, in particular to a multifunctional height-adjustable portal frame for electric power construction.

Background

The portal frame is a novel small-sized hoisting portal frame developed according to the requirements of carrying equipment, warehouse in and out goods, hoisting and maintaining heavy equipment and material transportation in daily production of medium and small factories (companies). The method is suitable for manufacturing moulds, automobile repair factories, mines, civil engineering construction sites and occasions needing lifting. The lifting machine is commonly used for material transportation and up-and-down use of constructors in building construction, and achieves lifting mechanization. The manpower can be reduced, the production and operation cost can be reduced, and the working efficiency can be improved.

The 110kV equipment applied to the existing transformer substation is GIS equipment, and in the assembling process of the GIS equipment, especially in the assembling process of PT and bus barrels, due to the fact that the equipment is heavy in mass and installed at a height above the ground, a lot of inconvenience exists in the installing process.

When the GIS room design, the top is not designed to hang, generally adopts pre-buried couple, need climb to indoor top and hang the chain block and carry out equipment work in PT and combined electrical apparatus generating line section of thick bamboo equipment process, and hang the back and only to a work point in below, need remove when carrying out next group of PT equipment again, select to hang again behind the point and articulate again, not only wastes time and energy, has serious potential safety hazard in the climbing in-process moreover.

At present, the portal frame that most electric power construction adopted includes the base, the perpendicular fixedly connected with montant of ground one end is kept away from to the base, rotates between two montants and is connected with the crossbeam, crossbeam intermediate position fixedly connected with hoist mechanism, hoist mechanism includes lifting unit and drive assembly, lifting unit and crossbeam fixed connection, drive assembly connects the one end at crossbeam length direction. The driving mechanism is used for driving the cross beam to rotate, the winding rope is wound in the rotating process of the cross beam, and the winding rope is used for lifting the equipment.

Aiming at the related technologies, the inventor thinks that the defects of complex environment, frequent movement of the gantry crane and inconvenient disassembly and assembly of the gantry crane exist in the electric power construction.

SUMMERY OF THE UTILITY MODEL

In order to make portal crane easy dismounting, this application provides a portal frame with adjustable many functions height for electric power construction.

The application provides a pair of portal frame with adjustable a many functions height for electric power construction adopts following technical scheme:

the utility model provides a portal frame with adjustable many functions height for electric power construction, includes the base, the base has two, the base is kept away from ground one end and is articulated to have a supporting mechanism, supporting mechanism is connected with stop gear, stop gear keeps away from supporting mechanism one end and base fixed connection, supporting mechanism keeps away from base one end and rotates and be connected with the crossbeam, the first hoist mechanism of crossbeam intermediate position fixedly connected with, first hoist mechanism is including promoting subassembly and drive assembly, promote subassembly and crossbeam fixed connection, drive assembly connects the one end at crossbeam length direction, the base is connected with second hoist mechanism.

By adopting the technical scheme, the supporting mechanism is hinged with the base, the supporting mechanism can rotate relative to the base, and when the portal frame is installed, the limiting mechanism is disconnected from the base, so that an included angle between the supporting mechanism and the base is in a small state, and a worker can assemble the portal frame conveniently. After the portal frame is assembled, the supporting mechanism is perpendicular to the base, one end, far away from the supporting mechanism, of the limiting mechanism is fixed with the base, the supporting mechanism and the base are kept relatively fixed, and supporting is stable.

Preferably, the supporting mechanism comprises a first vertical rod and a second vertical rod, the first vertical rod is hinged to the base, one end, away from the base, of the first vertical rod is in threaded connection with the second vertical rod, the first vertical rod and the second vertical rod are coaxially arranged, and one end, away from the first vertical rod, of the second vertical rod is rotatably connected with the cross beam.

Through adopting above-mentioned technical scheme, between the crossbeam installation of portal frame, according to the required height of work, rotate the second montant and adjust supporting mechanism's height, the workman of being convenient for uses.

Preferably, the hoisting component includes two spacing dishes and a roll cable, two spacing dishes all with the coaxial fixed connection of crossbeam, it is located between two spacing dishes to roll up the cable, roll up cable and crossbeam fixed connection, it keeps away from crossbeam one end fixedly connected with hanging flower basket to roll up the cable, drive assembly includes motor, first gear, second gear and chain, first gear and crossbeam length direction's the coaxial fixed connection of one end, the second gear rotates to be connected on the first montant that is close to first gear, the second gear is located the position that first montant is close to the base, motor fixed connection is on the base, the main shaft and the coaxial fixed connection of second gear of motor, first gear passes through the chain with the second gear and is connected.

Through adopting above-mentioned technical scheme, the main shaft of motor rotates and drives the second gear rotation, utilizes the chain to make first gear and second gear synchronous revolution during the second gear rotation, and first gear drives the crossbeam and rotates. The winding or the loosening of the winding rope is realized through the forward and reverse rotation of the cross beam, the effect of controlling the lifting of the hanging basket is achieved, the winding rope is limited by utilizing the two limiting discs, the winding range of the winding rope is limited, the winding is more stable, and the lifting process of the hanging basket is more stable.

Preferably, the limiting mechanism comprises a first limiting rod, the first limiting rod is hinged to the first vertical rod, and one end, far away from the first vertical rod, of the first limiting rod is fixedly connected with the base through a bolt.

Through adopting above-mentioned technical scheme, utilize the bolt to keep away from first montant one end to first gag lever post and fix with the base, make first gag lever post and base easy dismounting. One end, far away from the base, of the first limiting rod is hinged to the first vertical rod, so that the first limiting rod can rotate relative to the first vertical rod when being separated from the base, and interference of the first limiting rod on rotation of the first vertical rod is reduced.

Preferably, the second hoisting mechanism comprises a winch, a sleeve, a hook and a fixed pulley, the winch is fixedly connected to the base, the winch is located between two first vertical rods, the sleeve is coaxially sleeved on the outer side of the cross beam, the sleeve is fixedly connected with the second vertical rods, the sleeve is close to one end of the base and provided with a sliding groove, the fixed end of the fixed pulley is slidably connected to the sliding groove, a connecting rope of the winch penetrates through a gap between a rotating wheel of the fixed pulley and the sleeve and is fixedly connected with the hook, and the connecting rope of the winch and the rotating wheel of the fixed pulley are far away from one end of the base in a butt joint mode.

Through adopting above-mentioned technical scheme, the reel that utilizes the hoist engine rotates and connects rope rolling or relaxs to the lift of control couple utilizes the couple to connect the equipment that promotes reaches the effect of carrying the equipment of carrying. The fixed end of the fixed pulley is connected with the sleeve in a sliding manner, so that the fixed pulley and the sleeve slide relatively, the position of the hook is changed, and the hook is convenient for workers to use.

Preferably, two the base all is connected with moving mechanism, moving mechanism has four groups, and is two sets of moving mechanism connects respectively on the lateral wall at a base both ends, and other two sets of moving mechanism connects respectively on the lateral wall at another base both ends, moving mechanism includes two for base lateral wall pivoted gyro wheel, two the coaxial setting of gyro wheel, the roll axis and the plane perpendicular of base lateral wall place of gyro wheel.

Through adopting above-mentioned technical scheme, all connect two sets of moving mechanism on two bases, make the base ground movement relatively to make portal frame global movement. The moving mechanism comprises two rollers which rotate relative to the side wall of the base, and the friction between the base and the ground in the moving process is reduced by the rollers, so that the moving is more labor-saving. A set of moving mechanism is connected respectively through the both ends at a base, makes the base remove more steadily, and four gyro wheels are even atress, guarantee that four gyro wheels receive the degree of wear similar, improve the holistic life of rolling mechanism.

Preferably, the moving mechanism further comprises a fixing shaft, one end of the fixing shaft is coaxially and rotatably connected with the roller, and the other end of the fixing shaft is fixedly connected with the side wall of the base.

Through adopting above-mentioned technical scheme, utilize the fixed axle to make the gyro wheel rotate for the lateral wall of base, make the connection structure between rolling subassembly and the base lateral wall more stable.

Preferably, the fixed axle includes one end and base lateral wall fixed connection's axis of rotation and one end and the coaxial pivoted oscillating axle of gyro wheel, the one end that the gyro wheel was kept away from to the oscillating axle is articulated with the one end of axis of rotation, the articulated axis of rotation and oscillating axle is vertical setting.

By adopting the technical scheme, the swinging shaft can swing relative to the rotating shaft, so that the roller is driven to swing, the roller has a certain steering space, and the base can conveniently move in multiple directions.

Preferably, the one end that the gyro wheel was kept away from to the oscillating axle extends the limiting plate, the arc hole has been seted up to the limiting plate, fixed axle lateral wall fixedly connected with rather than vertically second gag lever post, the second gag lever post passes the arc hole.

Through adopting above-mentioned technical scheme, to the restriction that rotates the space of gyro wheel, avoid gyro wheel turned angle too big, make the removal of base too nimble, be unfavorable for the moving direction of workman control portal frame.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the supporting mechanism is hinged with the base, the supporting mechanism can rotate relative to the base, and when the portal frame is installed, the limiting mechanism is disconnected from the base, so that an included angle between the supporting mechanism and the base is in a small state, and a worker can assemble the portal frame conveniently;

2. the two limiting discs are coaxially and fixedly connected to the cross beam, the coiled cable is located between the two limiting discs, and the two limiting discs are used for limiting the coiled cable, so that the winding range of the coiled cable is limited, the coiling is more stable, and the lifting process of the hanging basket is more stable;

3. two sets of moving mechanisms are connected to the two bases, so that the bases can move relative to the ground, and the portal frame moves integrally. The friction between the moving mechanism and the ground is rolling friction, and the portal frame is convenient to move.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a schematic structural view of a second lifting mechanism portion of the present embodiment;

fig. 3 is a schematic structural view of a moving mechanism portion of the present embodiment.

Description of reference numerals: 100. a base; 200. a support mechanism; 210. a first vertical bar; 220. a second vertical bar; 300. a limiting mechanism; 310. a first limit rod; 320. a bolt; 400. a cross beam; 500. a first lifting mechanism; 510. a lifting assembly; 511. a limiting disc; 512. rope winding; 513. a hanging basket; 520. a drive assembly; 521. a motor; 522. a first gear; 523. a second gear; 524. a chain; 600. a second lifting mechanism; 610. a winch; 620. a sleeve; 630. hooking; 640. a fixed pulley; 650. a chute; 700. a moving mechanism; 710. a roller; 720. a fixed shaft; 721. a rotating shaft; 722. a swing shaft; 730. a limiting plate; 740. an arc-shaped hole; 750. a second limiting rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a portal frame with adjustable many functions height for electric power construction. Referring to fig. 1, a multifunctional height-adjustable portal frame for electric power construction includes two bases 100, a supporting mechanism 200 is hinged on the base 100, so that the supporting mechanism 200 can rotate relative to the base 100, and when the portal frame is installed, an included angle between the supporting mechanism 200 and the base 100 is in a small state, which is convenient for a worker to assemble the portal frame. The supporting mechanism 200 is connected with a limiting mechanism 300, one end of the limiting mechanism 300, which is far away from the supporting mechanism 200, is fixedly connected with the base 100, and after the portal frame is installed, the limiting mechanism 300 is used for relatively fixing the supporting mechanism 200 and the base 100. A cross beam 400 is vertically and rotatably connected between the two supporting mechanisms 200, and the cross beam 400 is a cylinder. The base 100 is fixedly connected with a moving mechanism 700, and the base 100 can move on the ground through the moving mechanism 700. The middle position of the cross beam 400 is fixedly connected with a first lifting mechanism 500, the first lifting mechanism 500 comprises a lifting assembly 510 and a driving assembly 520, the lifting assembly 510 is fixedly connected with the cross beam 400, and the driving assembly 520 is connected to one end of the cross beam 400 in the length direction. The worker is lifted using the first lifting mechanism 500 so that the worker can work at a distance from the ground. The base 100 is connected with a second lifting mechanism 600, and the apparatus is lifted by the second lifting mechanism 600.

Referring to fig. 1, the limiting mechanism 300 includes a first limiting rod 310, the first limiting rod 310 is hinged to the first vertical rod 210, and one end of the first limiting rod 310, which is far away from the first vertical rod 210, is fixedly connected to the base 100 through a bolt 320. The bolt 320 is used to fix the end of the first limiting rod 310 away from the first vertical rod 210 and the base 100, so that the first limiting rod 310 and the base 100 can be conveniently disassembled and assembled. The end of the first limiting rod 310 away from the base 100 is hinged to the first vertical rod 210, so that the first limiting rod 310 can rotate relative to the first vertical rod 210 when being separated from the base 100, and interference of the first limiting rod 310 on rotation of the first vertical rod 210 is reduced.

Referring to fig. 1, the supporting mechanism 200 includes a first vertical rod 210, the first vertical rod 210 is hinged to the base 100, one end of the first vertical rod 210, which is far away from the base 100, is connected to a second vertical rod 220 through a screw thread, the first vertical rod 210 and the second vertical rod 220 are coaxially disposed, and one end of the second vertical rod 220, which is far away from the first vertical rod 210, is rotatably connected to the cross beam 400. Between the installation of crossbeam 400 of portal frame, according to the required height of work, rotate second montant 220 and adjust the height of supporting mechanism 200, the workman of being convenient for uses.

Referring to fig. 1, the lifting assembly 510 includes two limiting discs 511, the two limiting discs 511 are both coaxially and fixedly connected with the cross beam 400, a coiled cable 512 is disposed between the two limiting discs 511, one end of the coiled cable 512 is fixedly connected with the cross beam 400, and one end of the coiled cable 512 far away from the cross beam 400 is fixedly connected with a hanging basket 513. When the portal frame is used, workers enter the hanging basket 513, and the hanging basket 513 is used for lifting the workers to a position with a certain height away from the ground, so that the workers can work conveniently.

Referring to fig. 1, the driving assembly 520 includes a motor 521, and the motor 521 is fixedly connected to the base 100. A first gear 522 is coaxially and fixedly connected to one end of the cross beam 400 in the longitudinal direction. The first vertical rod 210 close to the first gear 522 is rotatably connected with a second gear 523, and the second gear 523 is located at a position where the first vertical rod 210 is close to the base 100. The main shaft of the motor 521 is coaxially and fixedly connected with the second gear 523, and a chain 524 is connected between the first gear 522 and the second gear 523. The main shaft of the machine rotates to drive the second gear 523 to rotate, when the second gear 523 rotates, the chain 524 is used to make the first gear 522 and the second gear 523 rotate synchronously, and the first gear 522 drives the beam 400 to rotate.

Referring to fig. 2, the second lifting mechanism 600 includes a winch 610, the winch 610 is fixedly connected to the base 100, and the winch 610 is located between the two first vertical rods 210. The outer side of the cross beam 400 is coaxially sleeved with a sleeve 620, and the sleeve 620 is fixedly connected with the second vertical rod 220. One end of the sleeve 620 close to the base 100 is provided with a sliding groove 650, a fixed pulley 640 is slidably connected in the sliding groove 650, and the fixed end of the fixed pulley 640 is slidably connected with the sleeve 620. The hoist 610 is connected with a hook 630, a connecting rope of the hoist 610 passes through a gap between the rotating wheel of the fixed pulley 640 and the sleeve 620 and is fixedly connected with the hook 630, and the connecting rope is abutted against one end, far away from the base 100, of the rotating wheel of the fixed pulley 640. The winding drum of the winding machine 610 rotates to wind or release the connecting rope, so that the hook 630 is controlled to lift, the hook 630 is connected with a lifting device, and the effect of lifting the device is achieved. The fixed end of the fixed pulley 640 is slidably connected with the sleeve 620, so that the fixed pulley 640 and the sleeve 620 can slide relatively, thereby changing the position of the hook 630 and facilitating the use of workers.

Referring to fig. 3, two bases 100 are connected with moving mechanisms 700, there are four sets of moving mechanisms 700, two sets of moving mechanisms 700 are respectively connected to the side walls at two ends of one base 100, the other two sets of moving mechanisms 700 are respectively connected to the side walls at two ends of the other base 100, the moving mechanism 700 includes two rollers 710 rotating relative to the side walls of the bases 100, the two rollers 710 are coaxially arranged, and the rolling axes of the rollers 710 are perpendicular to the plane where the side walls of the bases 100 are located. Two sets of moving mechanisms 700 are connected to the two bases 100, so that the bases 100 can move relative to the ground, and the portal frame can move integrally. The moving mechanism 700 includes two rollers 710 rotating relative to the side walls of the base 100, and the rollers 710 reduce the friction between the base 100 and the ground during moving, thereby saving labor. The two ends of one base 100 are respectively connected with one group of moving mechanisms 700, so that the base 100 can move more stably, the four rollers 710 are uniformly stressed, the abrasion degrees of the four rollers 710 are close, and the service life of the whole rolling mechanism is prolonged.

Referring to fig. 3, the moving mechanism 700 further includes a fixing shaft 720 having one end coaxially and rotatably connected to the roller 710, and the other end of the fixing shaft 720 is fixedly connected to the sidewall of the base 100. The roller 710 is rotated relative to the sidewall of the base 100 by the fixing shaft 720, so that the connection structure between the rolling assembly and the sidewall of the base 100 is more stable. The fixed shaft 720 includes a rotating shaft 721 with one end fixedly connected with the sidewall of the base 100 and a swinging shaft 722 with one end rotating coaxially with the roller 710, one end of the swinging shaft 722 far away from the roller 710 is hinged with one end of the rotating shaft 721, and the hinged axes of the rotating shaft 721 and the swinging shaft 722 are vertically arranged. The swing shaft 722 can swing relative to the rotation shaft 721 to drive the roller 710 to swing, so that the roller 710 has a certain turning space, thereby facilitating the multi-directional movement of the base 100.

Referring to fig. 3, a limiting plate 730 extends from one end of the swing shaft 722 far away from the roller 710, the limiting plate 730 is provided with an arc-shaped hole 740, a second limiting rod 750 perpendicular to the side wall of the fixed shaft 720 is fixedly connected to the side wall of the fixed shaft 720, and the second limiting rod 750 passes through the arc-shaped hole 740. The limiting plate 730, the arc-shaped hole 740 formed in the limiting plate and the first limiting rod 310 limit the rotating space of the roller 710, so that the roller 710 is prevented from rotating at an excessively large angle, the base 100 is moved too flexibly, and the movement direction of the portal frame is not favorably controlled by a worker.

The implementation principle of the multifunctional height-adjustable portal frame for electric power construction in the embodiment of the application is as follows: when the portal frame needs to be used, the portal frame is firstly assembled. When the portal frame is assembled, a small angle is kept between the first vertical rod 210 and the base 100, the second vertical rod 220 is rotated according to the use requirement, the length of the supporting mechanism 200 is adjusted, and the cross beam 400 is rotatably connected between the two second vertical rods 220. The length of the chain 524 is adjusted according to the length of the support mechanism 200, and the first gear 522 and the second gear 523 are connected by the chain 524. The connecting rope passes through the gap between the rotating wheel of the fixed pulley 640 and the rotating drum and is fixedly connected with the hook 630. The first vertical rod 210 is rotated to make the first vertical rod 210 perpendicular to the base 100, one end of the first limiting rod 310 far from the first vertical rod 210 is fixedly connected to the base 100, the supporting mechanism 200 is relatively fixed to the base 100, and the main shaft of the motor 521 is coaxially and fixedly connected to the second gear 523.

The spindle of the motor 521 rotates to drive the second gear 523 to rotate, so that the beam 400 rotates, and the winding rope 512 is wound or loosened through the forward and reverse rotation of the beam 400, thereby lifting the hanging basket 513. The winding drum of the winding machine 610 rotates to wind or loosen the connection rope, so that the hook 630 is controlled to lift, the hook 630 is connected with a lifting device, and the effect of lifting the device is achieved. The fixed end of the fixed pulley 640 is slidably connected with the sleeve 620, so that the fixed pulley 640 and the sleeve 620 can slide relatively, thereby changing the position of the hook 630 and facilitating the use of workers.

The gantry can be moved within a small range by a moving mechanism 700 connected to the base 100. The rollers 710 are rotated relative to the sidewalls of the base 100 by the fixed shafts 720, so that the gantry can be moved conveniently. The fixed shaft 720 includes a rotating shaft 721 with one end fixedly connected with the sidewall of the base 100 and a swinging shaft 722 with one end rotating coaxially with the roller 710, one end of the swinging shaft 722 far away from the roller 710 is hinged with one end of the rotating shaft 721, and the hinged axes of the rotating shaft 721 and the swinging shaft 722 are vertically arranged. The swing shaft 722 can swing relative to the rotation shaft 721 to drive the roller 710 to swing, so that the roller 710 has a certain turning space, thereby facilitating the multi-directional movement of the base 100.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a portal frame with adjustable many functions height for electric power construction which characterized in that: including base (100), base (100) have two, base (100) are kept away from ground one end and are articulated to have supporting mechanism (200), supporting mechanism (200) are connected with stop gear (300), stop gear (300) are kept away from supporting mechanism (200) one end and base (100) fixed connection, base (100) one end rotation is kept away from in supporting mechanism (200) and is connected with crossbeam (400), crossbeam (400) the first hoist mechanism (500) of intermediate position fixedly connected with, first hoist mechanism (500) are including hoisting component (510) and drive assembly (520), hoisting component (510) and crossbeam (400) fixed connection, drive assembly (520) are connected in crossbeam (400) length direction's one end, base (100) are connected with second hoist mechanism (600).

2. The utility height adjustable portal frame for electric power construction of claim 1, wherein: the supporting mechanism (200) comprises a first vertical rod (210) and a second vertical rod (220), the first vertical rod (210) is hinged to the base (100), one end of the base (100) and one end of the second vertical rod (220) are far away from the first vertical rod (210), the first vertical rod (210) and the second vertical rod (220) are coaxially arranged, and one end of the second vertical rod (220) far away from the first vertical rod (210) is rotatably connected with the cross beam (400).

3. The utility height adjustable portal frame for electric power construction of claim 1, wherein: the lifting assembly (510) comprises two limiting discs (511) and a rolling cable (512), the two limiting discs (511) are fixedly connected with the beam (400) in a coaxial mode, the rolling cable (512) is located between the two limiting discs (511), one end of the rolling cable (512) is fixedly connected with the beam (400), one end of the rolling cable (512) far away from the beam (400) is fixedly connected with a hanging basket (513), the driving assembly (520) comprises a motor (521), a first gear (522), a second gear (523) and a chain (524), the first gear (522) is fixedly connected with one end of the beam (400) in the length direction in a coaxial mode, the second gear (523) is rotatably connected to a first vertical rod (210) close to the first gear (522), the second gear (523) is located at a position, close to the base (100), of the first vertical rod (210), and the motor (521) is fixedly connected to the base (100), the main shaft of the motor (521) is coaxially and fixedly connected with the second gear (523), and the first gear (522) is connected with the second gear (523) through a chain (524).

4. The utility height adjustable portal frame for electric power construction of claim 2, wherein: the limiting mechanism (300) comprises a first limiting rod (310), the first limiting rod (310) is hinged to a first vertical rod (210), and one end, far away from the first vertical rod (210), of the first limiting rod (310) is fixedly connected with the base (100) through a bolt (320).

5. The utility height adjustable portal frame for electric power construction according to claim 4, wherein: second hoist mechanism (600) include hoist engine (610), sleeve (620), couple (630) and fixed pulley (640), hoist engine (610) fixed connection is on base (100), hoist engine (610) are located between two first montants (210), the coaxial cover of sleeve (620) is established in the crossbeam (400) outside, sleeve (620) and second montant (220) fixed connection, spout (650) have been seted up near base (100) one end in sleeve (620), the stiff end sliding connection of fixed pulley (640) is in spout (650), the connection rope of hoist engine (610) passes clearance and couple (630) fixed connection between runner and sleeve (620) of fixed pulley (640), base (100) one end butt is kept away from with the runner of fixed pulley (640) to the connection rope of hoist engine (610).

6. The utility height adjustable portal frame for electric power construction of claim 1, wherein: two base (100) all are connected with moving mechanism (700), moving mechanism (700) have four groups, two sets of moving mechanism (700) are connected respectively on the lateral wall at a base (100) both ends, and other two sets of moving mechanism (700) are connected respectively on the lateral wall at another base (100) both ends, moving mechanism (700) include two for base (100) lateral wall pivoted gyro wheel (710), two gyro wheel (710) coaxial setting, the roll axis and base (100) lateral wall place plane vertical of gyro wheel (710).

7. The utility height adjustable portal frame for electric power construction of claim 6, wherein: the moving mechanism (700) further comprises a fixed shaft (720) with one end coaxially and rotatably connected with the roller (710), and the other end of the fixed shaft (720) is fixedly connected with the side wall of the base (100).

8. The utility height adjustable portal frame for electric power construction of claim 7, wherein: the fixed shaft (720) comprises a rotating shaft (721) with one end fixedly connected with the side wall of the base (100) and a swinging shaft (722) with one end coaxially rotating with the roller (710), one end of the swinging shaft (722) far away from the roller (710) is hinged with one end of the rotating shaft (721), and the hinged axes of the rotating shaft (721) and the swinging shaft (722) are vertically arranged.

9. The utility height adjustable portal frame for electric power construction of claim 8, wherein: swing axle (722) keep away from the one end of gyro wheel (710) and extend limiting plate (730), arc hole (740) have been seted up to limiting plate (730), fixed axle (720) lateral wall fixedly connected with and its vertically second gag lever post (750), second gag lever post (750) pass arc hole (740).

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