Horizontal pulley

Abstract

The utility model discloses a horizontal pulley which comprises a pulley, a lifting mechanism and a supporting leg sleeve which are sequentially connected, the lifting mechanism comprises a U-shaped pulley supporting frame, a pulley lifting A column and a pulley lifting B column, the pulley is installed in the U-shaped pulley supporting frame, the pulley lifting A column is fixedly installed on the lower side of the U-shaped pulley supporting frame, and the supporting leg sleeve is fixedly installed on the lower side of the U-shaped pulley supporting frame. The pulley lifting column B is sleeved with the pulley lifting column A, open grooves are formed in the pulley lifting column A and the pulley lifting column B in an aligned mode, the supporting leg sleeve comprises a left pulley jacking piece, a right pulley jacking piece and a rotating shaft, and the left pulley jacking piece and the right pulley jacking piece are installed on the rotating shaft. The rotating shaft penetrates through open grooves in the pulley lifting column A and the pulley lifting column B, so that the pulley lifting column A is installed in the left pulley jacking piece and the right pulley jacking piece, and the upper end of the left pulley jacking piece and the upper end of the right pulley jacking piece make contact with the bottom of the U-shaped pulley supporting frame. The device has the advantage that the top horizontal pulley can be kept horizontal all the time.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power construction, in particular to a horizontal pulley at the top of an auxiliary mechanism for erecting a herringbone raft. Background Art

[0002] When the power system is currently installing poles outdoors, it generally uses herringbone poles to erect the poles that have been transported to the erection site. However, the erection process of the herringbone pole is very laborious: the herringbone pole includes a herringbone pole and two bottom plates at the bottom. The two bottom plates are installed at the bottom of the herringbone pole like a pair of shoes, and the herringbone pole can rotate around the bottom plates. The herringbone pole needs to be erected at the construction site: lift the herringbone pole that is flat on the ground, make it rotate around the bottom plate, and fix the pull rope at the top of the herringbone pole. After the herringbone pole is lifted to a certain height, it is straightened by manpower from the other end of the herringbone pole, and then the herringbone pole and the bottom plate are fixed so that the herringbone pole will no longer rotate around the bottom plate. This process requires multiple people to hold the bottom plate where the herringbone pole contacts the ground (to prevent the bottom plate from sliding forward when the herringbone pole is lifted). After that, multiple people work hard at the top of the herringbone pole to lift the top of the herringbone pole, so that the herringbone pole is constantly rotated around the bottom plate and raised. After the top of the herringbone pole is lifted to a certain height, the construction workers can no longer lift the top of the herringbone pole with their hands. According to construction experience, the herringbone pole is placed on the shoulders of the construction workers at this time, and the construction workers carry the herringbone pole on their shoulders, and the construction workers continue to walk towards the bottom plate. When the position of the bottom plate remains unchanged, the closer the construction workers are to the bottom plate, the higher the herringbone pole is lifted. When the herringbone pole is lifted to a certain height, the construction workers and the staff at the other end of the bottom plate can tighten the rope, straighten the herringbone pole, and fix the herringbone pole and the bottom plate. The whole process is very strenuous, and the construction workers have to spend a lot of effort.

[0003] In order to solve the above technical problems, the inventor has designed an auxiliary mechanism for erecting a herringbone pick-up rod, and applied for a Chinese utility model patent on August 12, 2022, with application number: 2022222121127.1, to assist in erecting a herringbone pick-up rod. However, in the actual production and use of the power system, it was found that the original design had certain defects: the original design only used a pulley shaft to connect the two auxiliary brackets of the auxiliary mechanism for erecting the herringbone pick-up rod, and a fixed pulley was put on the pulley shaft. However, such a design has a problem in actual use: the two auxiliary brackets are fixed to the base on the ground, and the tops of the two auxiliary brackets are connected by the pulley shaft, forming a trapezoid-like quadrilateral as a whole. The structure of the quadrilateral is unstable. Therefore, during the construction process, after the auxiliary mechanism for erecting the herringbone pick-up rod is established, the pulley shaft at the top is not completely fixed. When the length of the auxiliary bracket is too long, the pulley will twist and cannot be parallel to the horizontal plane. The two auxiliary brackets, the pulley shaft and the bottom fastening mechanism cannot form a quadrilateral, and the entire auxiliary mechanism is difficult to use. Utility Model Content

[0004] In order to solve the above technical problems, the inventor proposed a horizontal pulley on the basis of the original design to replace the original pulley shaft and fixed pulley, and installed it on the top of the auxiliary mechanism for erecting the herringbone pulley to ensure that the entire auxiliary mechanism for erecting the herringbone pulley will not be deformed after the installation is completed.

[0005] The technical solution of the utility model is as follows:

[0006] A horizontal pulley comprises a pulley, a lifting mechanism and a leg support sleeve connected in sequence, the lifting mechanism comprises a U-shaped pulley support frame, a pulley lifting A column, and a pulley lifting B column, the pulley is installed in the U-shaped pulley support frame, the pulley lifting A column is fixedly installed on the lower side of the U-shaped pulley support frame, the pulley lifting B column is sleeved in the pulley lifting A column, and the pulley lifting A column and the pulley lifting B column are both aligned and provided with slots, the leg support sleeve comprises a left pulley lifting piece, a right pulley lifting piece and a rotating shaft, the left pulley lifting piece and the right pulley lifting piece are installed on the rotating shaft, the rotating shaft passes through the slots on the pulley lifting A column and the pulley lifting B column, so that the pulley lifting A column is installed in the left pulley lifting piece and the right pulley lifting piece, and the upper ends of the left pulley lifting piece and the right pulley lifting piece are both in contact with the bottom of the U-shaped pulley support frame.

[0007] Furthermore, the contact points between the left pulley lifting member and the right pulley lifting member and the bottom of the U-shaped pulley supporting frame are in an arc shape.

[0008] Furthermore, the slot is a vertical slot, and the rotating shaft can move up and down in the slot.

[0009] The utility model has the advantages that after the two auxiliary brackets are unfolded, the connecting line of the auxiliary bracket and the bottom of the auxiliary bracket forms a triangle, the overall structure is stable and will not deform, and it is convenient to be used for erecting a herringbone pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a schematic diagram of the structure of the pulley and the U-shaped pulley support frame;

[0012] Figure 3 This is the first overall schematic diagram of the erection of the herringbone grouting pole;

[0013] Figure 4 The second overall schematic diagram for erecting the herringbone grout

[0014] 1. Pulley; 2. Lifting mechanism; 2.1. U-shaped pulley support frame; 2.2. Pulley lifting column A; 2.3. Pulley lifting column B; 2.4. Slotting; 3. Leg support sleeve; 3.1. Left pulley lifting piece; 3.2. Rotating shaft; 3.3. Right pulley lifting piece; 4. Pull rope; 5. Auxiliary bracket; 6. Horizontal pulley; 7. Herringbone rod; 8. Pull rope installation hole; 9. Fastening mechanism; 10. Base DETAILED DESCRIPTION

[0015] like Figure 1 and Figure 2 As shown, the utility model discloses a horizontal pulley, comprising a pulley 1, a lifting mechanism 2 and a leg support sleeve 3 connected in sequence, the lifting mechanism 1 comprises a U-shaped pulley support frame 2.1, a pulley lifting A column 2.2, and a pulley lifting B column 2.3, the pulley 1 is installed in the U-shaped pulley support frame 2.1, the pulley lifting A column 2.2 is fixedly installed on the lower side of the U-shaped pulley support frame 2.1, the pulley lifting B column 2.3 is sleeved in the pulley lifting A column 2.2, and the pulley lifting A column 2.2 and the pulley lifting B column 2.3 are aligned and provided with slots 2 .4, the leg support sleeve 3 includes a left pulley jacking member 3.1, a right pulley jacking member 3.3 and a rotating shaft 3.2, the left pulley jacking member 3.1 and the right pulley jacking member 3.3 are mounted on the rotating shaft 3.2, the rotating shaft 3.2 passes through the slots 2.4 on the pulley lifting A column 2.2 and the pulley lifting B column 2.3, so that the pulley lifting A column 2.2 is installed in the left pulley jacking member 3.1 and the right pulley jacking member 3.3, and the upper ends of the left pulley jacking member 3.1 and the right pulley jacking member 3.3 are in contact with the bottom of the U-shaped pulley support frame 2.1. The contact between the left pulley jacking member 3.1 and the right pulley jacking member 3.3 and the bottom of the U-shaped pulley support frame 2.1 is in an arc shape.

[0016] The erection mode of herringbone bar 7 is as follows Figure 3 and Figure 4 As shown, the herringbone raft 7 is transported to the site, and the herringbone raft 7 is first rotatably installed on the base 10, and the bases 10 are kept in the same horizontal plane. A pull rope installation hole 8 is provided on the top of the herringbone raft 7, and the pull rope 4 is tied in the pull rope installation hole 8. The tops of the two auxiliary brackets 5 are respectively inserted into the left pulley jacking piece 3.1 and the right pulley jacking piece 3.3 of the horizontal pulley 6, and the bottom of the auxiliary bracket 5 is fixedly installed on the base 10. At this time, the herringbone raft 7 lies flat on the ground. Then pull the pull rope 2, as shown in FIG. Figure 3 As shown, the herringbone pull rod 7 rotates around the base 10. The whole pulling process is divided into two stages: in the first stage, the height of the herringbone pull rod 7 has not yet exceeded the height of the top horizontal pulley 6 of the auxiliary bracket 5, and the pull rope 4 is in contact with the horizontal pulley 6, as shown in FIG. Figure 3In the second stage, the height of the herringbone pick 7 exceeds the height of the top horizontal pulley 6 of the auxiliary bracket 5, and then the pull rope 4 is gradually separated from the horizontal pulley 6, such as Figure 4 Such a design allows the construction workers to directly pull the pull rope 4 to pull the herringbone raker 7 to a vertical position on the ground without the need for the construction workers to lift the herringbone raker 7 by hand or shoulder during the erection process.

[0017] like Figure 1 and Figure 2 As shown, during the erection of the auxiliary bracket 5, since the two bases 10 are on the same horizontal plane, the two auxiliary brackets 5 are respectively connected with the left pulley jacking member 3.1 and the right pulley jacking member 3.3 of the horizontal pulley 6, and the left pulley jacking member 3.1 and the right pulley jacking member 3.3 are actually installed on the rotating shaft 3.2, so an isosceles triangle is formed between the connecting fastening mechanism 9 between the two bases 10 and the two auxiliary brackets 5. Since the two bases 10 are in a horizontal state, the fastening mechanism 9 between the two bases 10 is also in a horizontal state, and the perpendicular midline of the vertex angle of the isosceles triangle, namely the pulley lifting A column 2.2 and the pulley lifting B column 2.3, always remains vertical to the ground.

[0018] like Figure 1 As shown, the lifting mechanism 2 is essentially not fixedly connected to the left pulley lifting member 3.1, the right pulley lifting member 3.3 and the rotating shaft 3.2, and the rotating shaft 3.2 only passes through the slots 2.4 on the pulley lifting A column 2.2 and the pulley lifting B column 2.3. Therefore, no matter what state it is in, the lifting mechanism will be mounted on the left pulley lifting member 3.1 and the right pulley lifting member 3.3 due to the action of gravity and will not be suspended in the air. After the auxiliary bracket 5 is inserted into the left pulley lifting member 3.1 and the right pulley lifting member 3.3, when the auxiliary bracket 5 is unfolded and installed on the base 10, the left pulley lifting member 3.1 and the right pulley lifting member 3.3 rotate around the rotating shaft 3.2 respectively, and the tops of the left pulley lifting member 3.1 and the right pulley lifting member 3.3 rotate at the bottom of the U-shaped pulley support frame 2.1. It can be understood that when the auxiliary bracket 5 is unfolded outward, such as Figure 1 As shown, the point where the top of the left pulley lifting member 3.1 contacts the bottom of the U-shaped pulley support frame 2.1 rotates clockwise, and the point where the right pulley lifting member 3.3 contacts the bottom of the U-shaped pulley support frame 2.1 rotates counterclockwise, and the rotating shaft 3.2 moves downward in the slot 2.4, but the two auxiliary brackets 5 and the fastening mechanism 9 are always an isosceles triangle, so the pulley 1 at the top of the horizontal pulley 6 always remains horizontal. Conversely, when the auxiliary bracket 5 is closed inward, as shown in FIG. Figure 1As shown, the point where the top of the left pulley lifting member 3.1 contacts the bottom of the U-shaped pulley support frame 2.1 rotates counterclockwise, and the point where the right pulley lifting member 3.3 contacts the bottom of the U-shaped pulley support frame 2.1 rotates clockwise, and the rotating shaft 3.2 moves upward in the slot 2.4, but the two auxiliary brackets 5 and the fastening mechanism 9 are always an isosceles triangle, so the pulley 1 at the top of the horizontal pulley 6 always remains horizontal. In fact, in this design, it is only necessary to ensure that the two bases 10 at the bottom of the two auxiliary brackets 5 remain horizontal, and the pulley 1 always remains horizontal.

Claims

1. A horizontal pulley, characterized in that it comprises a pulley, a lifting mechanism and a leg support sleeve connected in sequence, the lifting mechanism comprising a U-shaped pulley support frame, a pulley lifting A column and a pulley lifting B column, the pulley is installed in the U-shaped pulley support frame, the pulley lifting A column is fixedly installed on the lower side of the U-shaped pulley support frame, the pulley lifting B column is sleeved in the pulley lifting A column, and the pulley lifting A column and the pulley lifting B column are both aligned and provided with slots, the leg support sleeve comprises a left pulley jacking piece, a right pulley jacking piece and a rotating shaft, the left pulley jacking piece and the right pulley jacking piece are installed on the rotating shaft, the rotating shaft passes through the slots on the pulley lifting A column and the pulley lifting B column, so that the pulley lifting A column is installed in the left pulley jacking piece and the right pulley jacking piece, and the upper ends of the left pulley jacking piece and the right pulley jacking piece are both in contact with the bottom of the U-shaped pulley support frame.

2. A horizontal pulley according to claim 1, characterized in that: The contact points between the left pulley lifting member and the right pulley lifting member and the bottom of the U-shaped pulley supporting frame are in an arc shape.

3. A horizontal pulley according to claim 1, characterized in that: The slot is a vertical slot, and the rotating shaft can move up and down in the slot.

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