Adjustable wheel base pay-off carriage

Abstract

The present application relates to the technical field of power transmission line construction, and more particularly to an adjustable-axle-distance pay-off trolley, comprising a frame, a small pulley, adjustable screw-type trolley supports, a central roller shaft and a locking device; the two ends of the central roller shaft are mounted on the frame through bearings, the locking device is connected with the central roller shaft and used for locking the central roller shaft on the frame, the adjustable screw-type trolley supports are divided into two groups, each group has eight supports, and each group is evenly fixed on the circumference of the two sides of the central roller shaft; connecting shafts are mounted between the two adjacent groups of adjustable screw-type trolley supports; and the small pulleys are multiple and evenly mounted on the connecting shafts. The device has great application prospects, is of great significance to mechanized safe construction, and especially under the background of the vigorous development of power transmission and distribution construction by the State Grid, can increase quality and efficiency, ensure safety and provide strong technical support for the development of reliable power grids.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transmission line construction, in particular to an adjustable-axle distance pay-off trolley. BACKGROUND

[0002] At present, pay-off construction basically adopts nylon large-diameter pay-off trolley, in order to ensure construction safety, the first pay-off trolley at the exit of a tension field (traction field) should be installed with double pay-off trolleys, and the middle wheels of the trolleys should be steel pulleys. At the same time, according to the calculated envelope angle and vertical load of each tower pay-off trolley, the number of each tower hanging pay-off trolley, the configuration of connecting tools and the check of whether the line rope is raised are determined. For the raised guide rope and traction rope, single-wheel line pressing trolley is used to press the rope to eliminate; for the raised wire, inverted pay-off trolley is used to press the wire to eliminate. The diameter of the groove bottom of the wire trolley wheel should not be less than 20d, and the diameter of the groove bottom of the ground wire trolley wheel should not be less than 15d.

[0003] The traditional pay-off trolley needs to hang double trolleys sometimes to reduce the envelope angle, which increases the construction workload; if the wire or traction rope is raised in the pay-off engineering, inverted trolley is also needed, which increases the construction difficulty; if the trolley is damaged during the pay-off process, the trolley needs to be replaced, which reduces the construction efficiency. SUMMARY

[0004] The present application proposes an adjustable-axle distance pay-off trolley to effectively solve the problems in the background technology.

[0005] The specific technical solution is as follows:

[0006] An adjustable-axle distance pay-off trolley, characterized in that it comprises a frame, a small pulley, an adjustable screw-type trolley support, a center roller and a locking device; the two ends of the center roller are installed on the frame through bearings, the locking device is connected with the center roller, and is used to lock the center roller on the frame, the adjustable screw-type trolley support is divided into two groups, each group has eight, and is evenly fixed on the circumferential surface of the two sides of the center roller, a connecting shaft is installed between the two adjacent groups of adjustable screw-type trolley supports, and the small pulley is a plurality of and is evenly installed on the connecting shaft.

[0007] The adjustable screw type trolley support comprises a support body, an umbrella gear pair, a gear bearing plate, a screw rod bearing seat, a lifting screw rod and a lifting block, the umbrella gear pair is installed inside the support body, the umbrella gear pair is connected with a wrench outside, the gear bearing plate is fixed in the support body, the umbrella gear pair is connected with the gear bearing plate through a bearing, the screw rod bearing seat is fixed in the support body and used for supporting the lifting screw rod, the upper end of the lifting screw rod is connected with the umbrella gear pair through the screw rod bearing seat, the inside of the lifting block is screwed with the lifting screw rod, the outside of the lifting block is slidably connected with the inner wall of the support body, and the small pulley is installed on the top of the lifting block.

[0008] The locking device comprises a brake gear, a center roller brake gear and a locking pin buckle, the brake gear is fixed on the frame, the center roller brake gear is installed on the center roller, the brake gear is located outside the center roller brake gear, and the locking pin buckle is installed on the brake gear and matched with the center roller brake gear.

[0009] Compared with the prior art, the beneficial effects of the present application are: from the innovative point of view, because the wire laying trolley can only run in the rolling bearing mode, the structure and use mode of the traditional trolley are changed, the traditional large pulley is replaced by parallel small rollers which can be freely lifted, the innovation changes from a single bearing to a multi-bearing system, not only the center bearing has rolling characteristics, but also the small trolley on the adjustable support has a bearing group; the foot brake device of the traditional trolley has a pin shaft self-locking function.

[0010] From the safety point of view, when the envelope angle of the trolley and the wire is too small, 2 groups of nylon rollers can be extended, and then the center shaft is locked to increase the envelope angle, the small rollers are used to lay the ground wire, the step of hanging double trolleys is saved, the high-altitude operation personnel is prevented from sliding down the trolley to do connection work, and the safety risk is reduced;

[0011] From the practicality point of view, when the wire is lifted, 1 group of small rollers below the wire ground wire can be shortened, the nylon rollers on the front and rear sides of the 1 group of small rollers are extended, then the device is locked, the wire ground wire passes through above and below 3 groups of small rollers respectively, so that the wire is pressed, and the construction difficulty of the inverted trolley is effectively reduced;

[0012] From the generalization point of view, in the wire laying process, when the roller in contact with the wire is damaged or fails, the roller can be extended to lift the wire, after the wire is lifted to a certain height, the wire naturally falls into other rollers, then the trolley is locked, and the small trolley is used for transmission, compared with the traditional trolley, the complicated construction process of lifting the wire to replace the trolley is effectively avoided;

[0013] Adjustable wheel base pay-off trolley has great application prospect, and has important significance for mechanized safe construction, especially under the background of national power grid developing power transmission and distribution construction, can increase quality and efficiency, and ensure safety. For the development of reliable power grid, it provides strong technical support. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present application;

[0015] Figure 2 is a side view of the present application;

[0016] Figure 3 is an internal view of the adjustable screw type trolley support in the present application;

[0017] Figure 4 is a position view of the center roller brake gear in the present application;

[0018] Figure 5 is a structural view of the locking device in the present application. DETAILED DESCRIPTION

[0019] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper", etc. can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned 90 degrees or in other orientations in other different ways, and the spatial relative description used herein is interpreted accordingly.

[0020] The specific embodiments of the present application will be described in detail below in conjunction with the drawings and preferred embodiments.

[0021] As shown in the drawings, an adjustable wheel base pay-off trolley comprises a frame 1, a small pulley 2, an adjustable screw type trolley support 3, a center roller 4 and a locking device 5. Figure 1

[0022] As shown in the drawings, an adjustable wheel base pay-off trolley comprises a frame 1, a small pulley 2, an adjustable screw type trolley support 3, a center roller 4 and a locking device 5. Figure 3 and Figure 4 ​As shown, the adjustable screw-type trolley bracket includes a bracket body 31, a bevel gear pair 32, a gear support plate 33, a screw bearing seat 34, a lifting screw 35, and a lifting block 36. The bevel gear pair is installed inside the bracket body and connected to a wrench 37 on the outside. The gear support plate is fixed inside the bracket body, and the bevel gear pair is connected to the gear support plate via a bearing. The screw bearing seat is fixed inside the bracket body and supports the lifting screw. The upper end of the lifting screw passes through the screw bearing seat and connects to the bevel gear pair. The lifting block has internal threads that are threaded to the lifting screw, and the outer side of the lifting block slides against the inner wall of the bracket body. A small pulley is installed on top of the lifting block. Turning the wrench 37 rotates the bevel gear pair 32, which in turn rotates the lower lifting screw 35, causing the lifting block 36 to extend outward from the bracket body 31, thus achieving the extension and retraction of the small pulley.

[0023] like Figure 5 As shown, the locking device includes a brake gear 51, a central roller brake gear 52, and a locking pin 53. The brake gear is fixed to the frame, the central roller brake gear is mounted on the central roller, and the brake gear is located on the outer ring of the central roller brake gear. The locking pin is mounted on the brake gear and engages with the central roller brake gear. The locking function of the central roller is achieved by the locking pin engaging between the brake gear 51 and the central roller brake gear 52.

[0024] The two ends of the central roller are mounted on the frame via bearings. The locking device is connected to the central roller to lock it onto the frame. The adjustable screw-type trolley brackets are divided into two groups of eight, each group evenly fixed around the circumference of the central roller. A connecting shaft 6 is installed between adjacent groups of adjustable screw-type trolley brackets. Multiple small pulleys are evenly installed on the connecting shaft. The adjustable bolt-type trolley brackets have an adjustment range of 822mm-916mm. During the laying process, the small pulley bearings and the central bearing work together to greatly reduce the resistance of the conductor laying. When the envelope angle between the trolley and the conductor is too small, Figure 2For example, after closing the locking device, lift pulleys 1 and 3 respectively to increase the envelope angle between the conductor and the trolley by increasing the radius of curvature. For instance, if pulley group 2 malfunctions or is damaged during the laying process, first lock the locking device, then use pulley group 2 to lift and fix the conductor, then open the locking device and replace pulley groups 1, 2, and 3 below the conductor with pulley groups 7, 8, and 1. Similarly, when laying different types of conductors, adjust the length of pulley groups 1-8 according to the scale of the adjustable bolt-type trolley bracket to adjust the trolley diameter to meet the radius of curvature of the laying trolley. When there is a situation where the conductor is raised, such as... Figure 2 As shown, pulley block 2 can be raised, and the walkway and wire can pass "above pulley blocks 1 and 3 and below pulley block 2".

[0025] The usage steps are as follows:

[0026] 1. First, determine the envelope angle between the conductor and the pulley in the tensioning field, and then determine the conductor type.

[0027] 2. Then adjust the pulley according to the wire type and envelope angle.

[0028] 3. Adjust the pulley supports at both ends. If the adjustable range of the pulleys still does not meet the envelope angle, the locking device can be opened to shorten the "2" angle.

[0029] Add "pulley group 1 and pulley group 3" to adjust the radius of curvature of the pulleys.

[0030] 4. When there are tower positions where the conductor rises in the laying section, raise pulley block No. 2, and let the guide plate and conductor pass "above pulley blocks No. 1 and No. 3 and below pulley block No. 2".

[0031] 5. In case of pulley failure during the laying process, such as the No. 2 pulley block being damaged, first lock the locking device, then use the No. 2 small pulley block to lift and fix the conductor, then open the locking device, and replace the original No. 1, No. 2, and No. 3 pulley blocks below the conductor with the No. 7, No. 8, and No. 1 pulley blocks.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An adjustable wheelbase pay-off sled, characterized by: The utility model relates to a kind of adjustable screw type pulley support frame, including frame, small pulley, adjustable screw type pulley support frame, center roller and locking device;Two ends of the center roller are installed on the frame by bearing, the locking device is connected with the center roller, for locking center roller on the frame, the adjustable screw type pulley support frame is divided into two groups, eight in each group, is fixed in the circumferential of the two sides of the center roller respectively, connecting shaft is installed between adjacent two adjustable screw type pulley support frames, the small pulley is multiple, is uniformly installed on the connecting shaft;The adjustable screw type pulley support frame includes support body, umbrella gear pair, gear support plate, screw rod bearing seat, lifting screw rod and lifting block, the umbrella gear pair is installed inside the support body, umbrella gear pair outside is connected with spanner, the gear support plate is fixed in the support body, umbrella gear pair is connected with the gear support plate by bearing, the screw rod bearing seat is fixed in the support body, for supporting lifting screw rod, the upper end of lifting screw rod passes through screw rod bearing seat and is connected with the umbrella gear pair, the inside of the lifting block is with thread and is connected with the lifting screw rod, the outside of lifting block and the inner wall of the support body sliding fit, the small pulley is installed in the top of lifting block;The locking device includes brake gear, center roller brake gear and locking pin buckle, the brake gear is fixed on the frame, the center roller brake gear is installed on the center roller, the brake gear is located in the outer ring of the center roller brake gear, the locking pin buckle is installed on the brake gear, locking pin buckle is matched with the center roller brake gear.

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