CN102108801A - Guide rail system for use on end part of cross arms of helicopter-assembled power transmission line iron tower - Google Patents

Abstract

The invention provides a guide rail system for use on the end part of cross arms of a helicopter-assembled power transmission line iron tower, which comprises a limiting device 21, a hook device 22, an ejecting device 23, and a stopping device 24. The limiting device 21 and the ejecting device 23 are mounted on the upper and lower main sections of a cross arm 31 which is arranged in place respectively; and the hook device 22 and the stopping device 24 are arranged on the upper and lower main sections of a hoisted cross arm 32. When the cross arm is position in place, a hook rod 51 on the hook device 22 hooks a cross rod 42 on the limiting device 21, and an ejecting rod 61 on an ejecting device 23 tightly ejects the baffle plate 71 on the stopping device 24. Through the traction on the upper part, and the stopping on the lower part, the hoisted cross arm can be accurately positioned at a mounting position. The guide rail system is simple in structure, can be quickly arranged and simply and conveniently manufactured and be used in helicopter hoisting of the end parts of the cross arms of standing iron towers, and has high generality and wide application range.

Description

A guide rail system for the end of the cross-arm of the iron tower of the transmission line erected by the helicopter

technical field

The invention belongs to the field of construction equipment for erecting iron towers of overhead transmission lines, and in particular relates to a guide rail system used for erecting cross-arm ends of iron towers of electric transmission lines by helicopters.

Background technique

Transmission line towers can be roughly divided into two types according to the structure type, that is, cable-stayed towers and self-supporting towers. Among them, self-supporting towers have been widely used because of their wide tower shape, good rigidity, and no need for cable. The self-supporting iron tower (Figure 1 is the plane wireframe diagram of a certain type of self-supporting iron tower) is generally a three-dimensional truss structure composed of hundreds or even thousands of steel sections connected by bolts or rivets, and its cross-section is mostly square or rectangular. One side is a plane truss. The four main members of the three-dimensional truss of the iron tower are called main materials, and the web materials are used to connect two adjacent main materials. The whole tower can be divided into multiple sections, including three parts from bottom to top: tower leg 11 (the first section of truss on the basis), tower body 12 (composed of multi-section trusses) and tower head 13, of which the horizontal part of tower head 13 is called It is a cross-arm 14, which is generally a variable-section square truss structure.

Self-supporting iron towers are generally assembled using the method of decomposing and assembling towers, and can also be assembled as a whole if conditions permit. The tower assembly method is to split the tower into a single root, single piece or single section, and use lifting equipment to carry out separate hoisting, aerial docking, and sequential assembly of an iron tower construction method. Compared with the commonly used construction poles, mobile cranes, tower cranes and other special tower cranes for tower assembly, helicopter tower assembly is a novel and unique construction method for iron tower assembly. Compared with other tower equipment, the use of helicopter towers has the following advantages:

(1) Since the tower section is assembled on the ground, the amount of high-altitude operations is reduced and the safety is good;

(2) There is no need to transport the tower assembly equipment and tower materials to the site where the iron tower is in place, which reduces the labor intensity of the construction personnel, and at the same time reduces the opening of transportation channels and vegetation felling, and protects the ecological environment. It is especially suitable for construction environments such as mountains and mountains bad place;

(3) The tower grouping efficiency is high.

The use of helicopter towers has high requirements for the segment weight, joint form, and joint position of the tower, and the biggest difficulty lies in how to ensure the accurate and automatic docking of the tower segments in the air, avoid manual intervention as much as possible, and ensure construction safety. Efficient, so the guide rails for tower section docking are very important.

Since some self-supporting iron towers have heavy cross arms, if the overall hoisting will exceed the lifting capacity of the helicopter, it is necessary to separate the end of the cross arm for separate hoisting. When using a helicopter to assemble the end of the cross arm of the self-supporting iron tower, the general construction process is as follows:

(1) Install the rail system 2 at the connection position between the suspended cross-arm end 32 and the cross-arm 31 in place;

(2) use the suspension device 33 to suspend the cross arm end 32 below the belly of the helicopter, then hoist it to the front top of the cross arm 31 in place and hover;

(3) The helicopter pilot gradually lowers the hovering height, so that the cross-arm end 32 slowly descends by the guidance of the guide rail system 2, and enters the installation position in place. At this time, the guide rail system 2 provides temporary support for the cross-arm end 32;

(4) The helicopter flies away after loosening the connection with the end of the cross arm, and the construction personnel climb the tower, use bolts and connecting plates to connect the end of the cross arm 32 and the cross arm 31 in place, and finally remove the guide rail system 2 to complete Helicopter hoisting construction at the end of the cross arm.

Contents of the invention

The purpose of the present invention is to provide a simple structure, safe and reliable guide rail system, which can meet the requirements of the helicopter assembly construction at the end of the cross arm in the iron tower of the power transmission line.

To achieve the above object, the present invention takes the following technical solutions:

A guide rail system for the ends of cross arms on both sides of a transmission line iron tower erected by a helicopter, characterized in that the guide rail system includes a limit device, a hook device, a push device and a stopper device, and the limit device is installed On the upper main material of the cross-arm that is in place, the pushing device is installed on the lower main material of the cross-arm in place, the hook device is installed on the upper main material of the suspended cross-arm, and the stop The device is installed on the lower main material of the suspended cross arm.

Wherein, the limiting device includes a limiting plate, a cross bar, a bottom plate I and a connecting plate I connected to the upper main material of the cross arm in place, the limiting plate is welded on the bottom plate I, and a connecting plate is welded below it. Plate 1, the horizontal bar is welded on the limit plate.

Wherein, there are two limiting plates, and the two limiting plates are arranged opposite to each other with a space between them. Gradually narrowing limit slot.

Wherein, a stiffened plate I is welded between the limiting plate and the bottom plate I and between the bottom plate I and the connecting plate I, and the cross bar passes through the stiffened plate I and is perpendicular to the stiffened plate I.

Wherein, the hook device includes a hook bar, a support plate I, a bottom plate II and a connecting plate II connected to the upper main material of the suspended cross arm, the support plate I is connected to one side of the hook bar, and the bottom plate II is respectively Connected to support plate I and connecting plate II.

Wherein, the middle and rear part of the hook rod is a straight rod, and the front part is a bow-shaped hook, and a stiffened plate II is welded on the bow-shaped hook and between the support plate I and the bottom plate II.

Wherein, the pushing device includes a push rod, a support plate II, a bottom plate III and a connecting plate III connected with the lower main material of the cross arm in place, the push rod is connected with the bottom plate III through the support plate II, and on the bottom plate III Welded with connecting plate III.

Wherein, the ejector rod is a straight rod, the bottom plate III and the connecting plate III are installed on one side of the ejector rod through the support plate II, and a stiffened plate III is welded between the support plate II and the bottom plate III.

Wherein, the stop device includes a baffle, a support plate III, a bottom plate IV and a connection plate IV connected to the lower main material of the suspended cross arm, and the baffle and the connection plate IV are connected through the support plate III and the bottom plate IV.

Wherein, the baffle is a flat plate, and a stiffened plate IV is welded between the baffle and the bottom plate IV.

The guide rail system used for the end of the cross arm in the iron tower of the transmission line erected by the helicopter of the present invention has the following beneficial effects:

(1) The structural form of each component of this type of guide rail system is simple, and the processing and manufacturing are convenient.

(2) Each component in the system is connected with the iron tower by bolts, which is convenient for installation and removal.

(3) This type of guide rail system can be used for the construction of helicopter assembly at the end of the cross arm in various types of iron towers, and has a wide range of applications.

Using the guide rail system of the present invention can ensure the safety, accuracy, automaticity and reliability of the end of the crossarm in the iron tower of the transmission line erected by the helicopter, and has good economic and social benefits.

Description of drawings

In order to make the content of the present invention more clearly understood, and to facilitate the description of specific embodiments, the accompanying drawings related to the present invention are provided below, and are described as follows:

Figure 1 is a structural wireframe diagram of a self-supporting iron tower, in which 11-tower legs, 12-tower body, 13-tower head, 14-cross arm;

Fig. 2 is the helicopter hoisting schematic diagram of cross arm end, among the figure 2-rail system, 31-cross arm in place, 32-hanging cross arm, 33-suspension device;

Figure 3 is a schematic diagram of the composition and installation relationship of the guide rail system of the present invention, in the figure 21-limiting device, 22-hook device, 23-jacking device, 24-stop device, 31-cross arm in place, 32- The suspended cross-arm, 34-the upper main material of the cross-arm in place, 35-the lower main material of the suspended cross-arm, 36-the upper main material of the suspended cross-arm, 37-the lower main material of the suspended cross-arm ;

Fig. 4 is the schematic structural view of the limiting device in the guide rail system of the present invention, wherein Fig. 4a is an oblique side view, and Fig. 4b is an oblique side view, among which 41-limiting plate, 42-cross bar, 43-base plate 1 , 44-connecting plate I, 45-stiffened plate I;

Fig. 5 is the schematic structural view of the hook device in the guide rail system of the present invention, in which 51-hook bar, 52-support plate I, 53-bottom plate II, 54-connecting plate II, 55-stiffened plate II;

Fig. 6 is a schematic structural view of the pushing device in the rail system of the present invention, in which 61-ejector, 62-support plate II, 63-bottom plate III, 64-connecting plate III, 65-stiffened plate III;

7 is a schematic structural view of the stop device in the guide rail system of the present invention, in which 71-baffle plate, 72-support plate III, 73-bottom plate IV, 74-connecting plate IV, 75-stiffened plate IV.

Detailed ways

The guide rail system used for the end of the crossarm in the iron tower of the transmission line erected by the helicopter of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 3, the guide rail system of the present invention includes four parts: a limit device 21, a hook device 22, a push device 23 and a stopper device 24. The limit device 21 and the push device 23 are respectively installed on the On the upper main material 34 and the lower main material 35 of the cross arm 31, the hook device 22 and the stopper device 24 are respectively installed on the upper main material 36 and the lower main material 37 of the suspended cross arm 32, and each part can be made of angle steel or steel plate It is welded, with simple structure and convenient processing and manufacturing; bolts are used to connect each component and the cross arm of the iron tower, which is convenient for installation and removal.

As shown in Figures 4a and 4b, the limiting device 21 includes a limiting plate 41, a cross bar 42, a base plate 143, a connecting plate 144 and a stiffened plate 145, and the limiting plate 41 is welded on the bottom plate 143 and welded below it. Connecting plate I44 is arranged, and cross bar 42 is welded on the limiting plate 41 horizontally. There are two limiting plates 41. The two limiting plates are relatively arranged with a distance between them. The upper parts of the two limiting plates 41 are slope-shaped and form a gradually narrowed space between them from top to bottom. The limiting groove can provide a guiding function for the positioning of the hook rod 51 of the hook device 22 . In order to strengthen the anti-collision capability of the limiting device 21, a reinforcing stiffened plate is welded at a local position: namely, two stiffened plates 145 are welded between the two limiting plates 41 and the base plate 143, and the cross bar 42 passes through the two A stiffened plate 1 is vertically arranged with the stiffened plate 1; several stiffened plates 145 are also welded between the base plate 143 and the connecting plate 144. Offer bolt holes on the connecting plate 1 44, use bolts to connect the connecting plate 1 on the upper main material 34 of the cross arm in place.

As shown in Figure 5, hook device 22 comprises hook bar 51, support plate I 52, base plate II 53, connecting plate II 54 and stiffened plate II 55, and support plate I52 is connected on one side of hook bar 51, and support plate I The bottom is welded with a base plate II53, and the base plate is welded with a connecting plate II54. The connecting plate II is provided with bolt holes, and the connecting plate II is connected to the upper main material 36 of the suspended cross arm by bolts. The middle and rear part of the hook rod 51 is a straight rod, and the front part is a bow-shaped hook. In order to strengthen the impact resistance of the hook device 22, a stiffened plate II55 is welded on the bow-shaped hook, and it is also welded between the support plate I52 and the bottom plate II53. There are several stiffened panels II55.

As shown in FIG. 6 , the pushing device 23 includes a push rod 61 , a support plate II62 , a bottom plate III63 , a connecting plate III64 and a stiffened plate III65 . The push rod 61 is a straight rod, and one side of the push rod is welded with a supporting plate II62, the upper end of the supporting plate II is connected with a base plate III63, and the connecting plate III64 is welded on the base plate III63. Bolt holes are provided on the connecting plate III64, and the connecting plate III64 is connected to the lower main material 35 of the cross arm in place by using bolts. In order to strengthen the anti-collision capability of the pushing device 23, several stiffened plates III65 are welded between the supporting plate II62 and the bottom plate III63.

As shown in FIG. 7 , the stop device 24 includes a baffle plate 71 , a support plate III72 , a bottom plate IV73 , a connecting plate IV74 and a stiffened plate IV75 . The baffle plate 71 and the bottom plate IV73 are both rectangular flat plates, the supporting plate III72 is connected with the baffle plate 71 and the bottom plate IV73 respectively, the connecting plate IV74 is welded on the bottom plate IV, and a bolt hole is opened on the connecting plate IV74, and the connecting plate IV74 is connected to the On the lower main material 37 of being hung cross-arm. In order to strengthen the impact resistance of the stopper 24 , a stiffened plate IV75 is welded between the baffle plate 71 and the bottom plate IV73 .

When in use, the limit device 21 is installed on the upper main material 34 of the cross arm 31 in place; the hook device 22 is installed on the upper main material 36 of the suspended cross arm 32; On the lower main material 35 of the bearer 31; the stop device 24 is installed on the lower main material 37 of the suspended cross arm 32. When in place, the hook rod 51 of the hook device 22 hooks the cross bar 42 of the limit device 21, so that the suspended cross arm 32 can be pulled; 71, so that the suspended cross arm 32 can be prevented from rotating around the cross bar 42 of the limiting device 21. Through the pulling of the upper part and the stopper of the lower part, the suspended cross arm 32 can be accurately positioned at the installation position.

The invention has been described herein in terms of specific exemplary embodiments. Appropriate substitutions or modifications will be apparent to those skilled in the art without departing from the scope of the present invention. The exemplary embodiments are illustrative only, and not limiting of the scope of the invention, which is defined by the appended claims.

Claims (10)

1. one kind is used for going straight up to the guide track system that unit founds iron tower of power transmission line cross-arm both side ends, it is characterized in that: this guide track system comprises stopping means (21), hooking device (22), thrustor (23) and stop device (24), described stopping means (21) is installed on the last main material (34) of cross-arm in place (31), described thrustor (23) is installed on the following main material (35) of cross-arm in place (31), described hooking device (22) is installed on the last main material (36) that is hung cross-arm (32), and described stop device (24) is installed on the following main material (37) that is hung cross-arm (32).

2. guide track system according to claim 1, it is characterized in that: described stopping means (21) comprises limiting plate (41), cross bar (42), base plate I (43) and the junction plate I (44) that links to each other with the last main material (34) of cross-arm in place, be welded with limiting plate (41) above the described base plate I (43), be welded with junction plate I (44) below it, described cross bar (42) horizontal welding is connected on the limiting plate (41).

3. guide track system according to claim 2, it is characterized in that: described limiting plate (41) has two, leave spacing between two limiting plate positioned opposite and the two, the top of described two limiting plates (41) is ramped shaped and constitutes a stopper slot of constriction gradually from top to bottom between the two.

4. according to claim 2 or 3 described guide track systems, it is characterized in that: be welded with stiffened panel I (45) between described limiting plate (41) and the base plate I (43) and between base plate I (43) and the junction plate I (44), described cross bar (42) pass stiffened panel I (45) and with the vertical setting of stiffened panel I (45).

5. guide track system according to claim 1, it is characterized in that: described hooking device (22) comprises hook bar (51), gripper shoe I (52), base plate II (53) and the junction plate II (54) that links to each other with the last main material (36) that is hung cross-arm, described gripper shoe I (52) is connected a side of hook bar (51), and described base plate II (53) links to each other with junction plate II (54) with gripper shoe I (52) respectively.

6. guide track system according to claim 5 is characterized in that: the postmedian of described hook bar (51) is a straight-bar, and the front portion is arc hook, all is welded with stiffened panel II (55) on this arc hook and between gripper shoe I (52) and the base plate II (53).

7. guide track system according to claim 1, it is characterized in that: described thrustor (23) comprises push rod (61), gripper shoe II (62), base plate III (63) and the junction plate III (64) that links to each other with the following main material (35) of cross-arm in place, described push rod (61) links to each other with base plate III (63) by gripper shoe II (62), is welded with junction plate III (64) on the base plate III (63).

8. guide track system according to claim 7, it is characterized in that: described push rod (61) is a straight-bar, described base plate III (63) and junction plate III (64) are welded with stiffened panel III (65) by the side that gripper shoe II (62) is installed in push rod (61) between described gripper shoe II (62) and the base plate III (63).

9. guide track system according to claim 1, it is characterized in that: described stop device (24) comprises that baffle plate (71), gripper shoe III (72), base plate IV (73) and the junction plate IV (74) that links to each other with the following main material (37) that is hung cross-arm, described baffle plate (71) link to each other with base plate IV (73) by gripper shoe III (72) with junction plate IV (74).

10. guide track system according to claim 9 is characterized in that: described baffle plate (71) is welded with stiffened panel IV (75) for dull and stereotyped between described baffle plate (71) and the base plate IV (73).

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