RU2496193C1 - Mast device - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: mast device comprises a base capable of installation onto a vehicle, support jacks, a telescopic mast, mechanisms of mast and its sections fixation in the working position, centrifugal fans of high pressure, connected in series, a mast with a pneumatic lift detached in plan via 120 degrees along the height on three levels and mechanisms of sections fixation made in the form of grips of adjacent sections relative to each other, which represent stops with inclined surface arranged in the lower part of the upper section, and spring-loaded thrust plates that are arranged in the upper part of the lower section.

EFFECT: increased reliability and load-carrying ability of a structure, reduced time for system deployment.

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Description

The invention relates to lifting devices, in particular to antenna devices, and relates to a telescopic mast used for mobile radio relay communication.

Known antenna mast device [RF patent No. 94063, H01Q 1/12, publ. 05/10/2010], consisting of a chassis on which the frame is mounted, a mast made in the “scissor” type is fixed at the base of the frame. An antenna post is installed on the upper mast platform. Stretch drives are mounted on the lateral surface of the swivel bearings, pivotally connected to a frame, the corners of which are installed hanging and leveling. The mast lifting and lowering system includes winches fixed on the frame, ropes from which are fixed on the upper links of the mast and pass through a system of blocks and wire hoists. Stretch marks from the drive of stretch marks pass through a tension sensor and a bypass block and are connected to the upper mast platform. On the external vertical beams of the rotary supports, winches with a manual drive and pins are fixed. Inside the vertical beams of the pivot bearings, there are retractable racks with holes located with a certain pitch, screw jacks with fastening elements of the support shoes are installed in the lower part of the retractable racks.

The main disadvantage of the known technical solution is that the mast design based on pantograph sections (scissor structure) does not have sufficient resistance to wind action, which reduces its rigidity, low mast lifting height with a low deployment speed, design complexity, and, accordingly, reduction in its reliability .

Such mobile antenna installations, as a rule, involve lifting mast devices based on the vehicle and used to lift the antennas. So, close from the class of lifts is the pneumatic telescopic mobile lift Mikheenko [RF application No. 2009107645/11, B66F 3/24, B66F 3/28, publ. 04/27/2011], containing a vertical pneumatic telescopic cylinder with a loading platform, mounted on a frame with screw supports and swivel wheels, a source of high air pressure - a centrifugal fan of medium or high pressure, a rope limiter of the lifting height.

The disadvantages of a mobile lift include: the absence of stretch marks, which reduces the possibility of its use in the open air and, as a result, a decrease in the reliability of the structure under wind load, the limited lifting capacity.

The closest set of essential features to the claimed invention is a mobile antenna installation [RF patent No. 2200359, H01Q 1/10, publ. 03/10/2003], containing a base that can be installed on a vehicle, front and rear support jacks, a frame mounted on a base on which a telescopic mast is placed in a horizontal position, on the upper section of which an additional frame is mounted with the possibility of rotation, on an additional frame with a possibility of rotation relative to the latter, a flange is mounted on which a ring is designed to rotate, designed to mount the antenna, the mast position drive in the working or trans ortnoe position, and locking mechanisms of the mast in the upright position and rotation of the antenna.

As a result of the analysis of this installation (hereinafter the mast device), it should be noted that the reliability of its design is reduced due to the rather complicated drive of turning the mast from the transport horizontal position to the working vertical and cable-block drive to extend the telescopic mast, rather complex drives to set the antenna to a predetermined position, which increases system deployment time in preparation for work.

The technical result of the proposed technical solution is to increase the reliability and carrying capacity of the structure, reducing the deployment time of the system.

The specified technical result is achieved in that in a mast device containing a base that can be mounted on a vehicle, support jacks, a telescopic mast with locking mechanisms, it is new that there are high-pressure centrifugal fans connected in series, the mast with pneumatic lifting, unfastened in the plan through 120 degrees in height at three levels and section fixation mechanisms made in the form of captures of adjacent sections relative to each other, representing from ba stops with an inclined surface located in the lower part of the upper section, and spring-loaded thrust plates located in the upper part of the lower section.

These differences allow us to conclude that the proposed technical solution meets the criterion of "novelty." Signs that distinguish the claimed device from the prototype are not identified in other technical solutions and, therefore, provide the claimed solution with the criterion of "inventive step".

The invention is illustrated by drawings.

Figure 1 shows the mast device in working position with the mast lifting at a level of 20 meters; figure 2 - mast device, view according to A of figure 1; figure 3 - adjacent mast sections with a mechanism for their fixation; figure 4 is a view according to B of figure 3 and a section BB of figure 3.

The mast device is mounted on the vehicle 1 (Figs. 1, 2), which includes remote telescopic beams 2 hydraulic supports 3, in the base 4 with a working platform mounted telescopic pneumatic mast mast with a fixed base section 5 and movable internal 6, on the last section there is an antenna post 7, slewing devices 8 of antennas 9, based on which high-pressure centrifugal fans 10 are installed, connected in series, cable extensions of the air-lift at the level of 20 meters 11, 40 meters 12 and 60 meters 13, 3 drum winches 14, adjacent sections of the pneumatic hoist 15 and 16 (Fig. 3), each of which contains grips 17, a rope 18, a spring 19, a stop limiter 20, a pulley 21, a stop collar-piston with a seal 22 (Fig. 4) ), a rubber gasket 23, an abutment element 24, bolted 25, an abutment 26, abutment plates 27, which are covered from above by an angular element 28, bushings 29, in the base 4 on the working platform there is a winch 30 (Figs. 1, 2) with fixing sectional drums (not shown), an electric generator 31.

The mast device operates as follows.

The device moves to the deployment location of radio-relay communication thanks to a cross-country vehicle 1 (Figs. 1, 2), for example, a Ural car with a dual cab, in the rear of which there is a hardware module (not shown) with a control system for the mobile communications complex and the whole radio equipment. Initially, telescopic beams 2 are pulled out, then the vehicle 1 is lifted on the hydraulic supports 3 to ensure the leveling of the base 4 with the work platform on a "circular level".

The lifting of the telescopic pneumatic hoist mast, the extension of its movable inner sections 6 (the base 5 being fixed on the base) with the antenna post 7, the slewing devices 8 of the antennas 9, is carried out due to the air pressure created by high-pressure centrifugal fans 10 connected in series, fed through the duct into the bottom of the mast (not shown).

Since the wind effect on it increases with increasing mast lifting height, to ensure stability of the position of the antenna post 7 with antennas 9 on the upper section of the mast, it is unfastened by cable braces 11, 12, 13 in a plan through 120 degrees with three cable braces 11 secured the last section of 20-meter height, three cable ties 12 on the last section of 40 meter height and three cable ties 13 on the last cargo section, the supply and locking of which is carried out by three 3-drum hoists 14, two of which mounted on two remote telescopic beams 2 and a third in the front of the vehicle 1. The design allows you to raise the antenna post 7 with antennas 9 (instead of antennas, another load can be installed) to a height multiple of the length of one section of the air lift due to the tension of the cable ties 11, 12, 13. So, for example, at a mast height of 20 meters, 3 rope stretches of level 11 of 20 meters are stretched to their full length, the remaining 6 rope stretches are not involved, at a height of 40 meters 3 rope stretches of 11 levels of 20 meters and 3 ropes are stretched e extensions of level 12 are 40 meters, and when the mast is deployed to a maximum height of 60 meters (or to an intermediate height multiple of one section), all 9 rope extensions are stretched.

Thus, rope extensions have a double function, both as limiters of the mast lifting height, and as extensions that ensure a stable position of the mast under wind load. In this case, the mast is equipped with mechanisms for fixing the mutual position of adjacent sections, one 15 in another 16 (Fig.3) with their maximum extension relative to each other in the working position. For this purpose, grippers 17 are installed on all sections, through which a rope 18 is drawn, one end of which is secured by a spring 19, and the other passes through an abutment stop 20 and a pulley 21.

The locking mechanism of adjacent sections works as follows (Fig. 4): section 15 slides upward along the inner surface of section 16 until the collar 22 stops through a rubber gasket 23 into a stop element 24, bolted 25 in the working area of the section with a cutout for passage of the stop 26, which its inclined surface shifts the thrust plate 27 to the left, covered by an angular element 28, the position of which is fixed on the rope 18 by the thrust bushings 29, then the stop 26 extends in the cutout of the thrust element 24 by the distance of the thickness of the plate 27, which then latches t this space is against the stop on the outer surface of section 15 due to the radial force created by the rope 18 passing through the pulley 21 down onto the securing sectional drums (not shown) of the winch 30 (Figs. 1, 2), with the stop stop 20 installed (Fig. 3) under the action of the spring 19. In this way, all the grips of the neighboring sections are triggered sequentially, after which the mast operates in the “rigid pipe” mode and ensures a stable position of the antenna post 7 with antennas 9 in their azimuthal direction within 180 ° and at the place of their standing within 30 °, both sintering stable radio communications. When the adjacent sections of the mast are unlocked, the rope 18, on which the thrust plates 27 (not shown in Fig. 3) are fixed by the thrust bushings 29, is pulled down through the pulley 21 onto the corresponding drum (not shown) of the sectional winch 30 (Fig. 1), while the thrust the plates 27 are all shifted and release the exit downward by the stops 26, the rope extensions 11, 12, 13 are wound on 3 drum winches 14. The telescopic mast is folded.

Antenna feeders - communication cables, electrical cables and control cables (not shown) are located at the bottom of the air lift on a drum (not shown). They are unwound and unwound automatically in accordance with the mast lifting height.

All energy consumers of the pneumatic hoist are driven by an electric generator 31 driven from the engine of the vehicle 1 through a two-threaded power take-off. One stream - the shaft of the power take-off leads the generator 31 (figure 1). The second stream - the shaft leads a regular hydraulic pump that feeds the standard telescopic beams 2 and hydraulic bearings 3 of the vehicle 1. The electric generator feeds: electric motors to drive fans 10, consumers of the radio post and equipment, electric motors of 3 drum winch 14 and sectional winch 30.

The design ensures the deployment of the device in working position for 8 minutes. Minimizing this time is necessary to ensure the tactical goals of the operational communications of the rapid reaction forces.

The mast capacity (from 5 to 10 tons) is determined by the pressure developed by one or two high-pressure fans connected in series, and by the large areas of the ends of the mast sections, on average, 2 meters in diameter, acting as pistons.

Three leading bridges, a large angle of entry and exit of the vehicle 1 provides the possibility of its movement over rough terrain. The width and height of the device in the transport position fits into the road dimensions.

Of particular interest is the application of the proposed technical solution in a wooded, rugged, and hilly area, since the antennas are raised for direct radio visibility at a height of up to 60 meters. All these factors expand the possibility of radio relay communication.

The mast device can also be used when building a mobile departmental transport communications network (field backbone communications network), organizing a broadband wireless access network with moving objects, transmitting data and monitoring objects with quick response services in hard-to-reach areas and in areas of natural disasters, technological disasters and incidents, as well as for the reservation of cable trunk and fiber-optic communication lines in case of an accident and emergency.

As a result of using the proposed technical solution, the reliability and carrying capacity of the structure are increased, and the deployment time of the system is reduced.

Claims (1)

A mast device containing a base that can be mounted on a vehicle, support jacks, a telescopic mast, locking mechanisms of the mast and its sections in the working position, characterized in that there are high-pressure centrifugal fans connected in series, the mast with pneumatic lifting, unfastened in plan through 120 ° in height at three levels, and section fixing mechanisms made in the form of grips of adjacent sections relative to each other, which are stops with an inclined surface located at the bottom of the upper section, and spring-loaded thrust plates located at the top of the lower section.

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