RU2350723C1 - Street lighting mast - Google Patents

Abstract

FIELD: lighting.

SUBSTANCE: invention concerns power industry object construction, particularly devices of electric street and square lighting. Street lighting mast includes basement and upper part connected by joint, device for vertical lift and descent of upper part, and lighting devices. Basement and upper part ends are slanted at sharp angle and conjugated to each other along broken sawtooth line. Joint connection is mounted at the sharp top of basement, while lift device is installed in mast basement niche and features hauling cable connected to lower sharp end of upper mast part over a pulley positioned in mast cavities. Reverse spring is installed at mast basement to disrupt upper mast part balance when it is leant down.

EFFECT: reduced cost of mast production and operation cost, improved reliability of street lighting.

1 dwg

Description

The invention relates to the construction of energy facilities, in particular the device of electric lighting in the streets and other open areas.

Known supports intended for installation of street lighting fixtures, for example a pole for street lighting according to US patent No. 6872883, class. Е04Н 12/00, published on March 29, 2005, attached to the foundation, on which a street lamp is fixed, and a switchgear and cables are located in the lower part of the column. The disadvantage of such a pillar is that for the maintenance of lamps and the replacement of light sources, it is necessary to climb a pole or use lifting mechanisms, which makes it more expensive and difficult to operate street lighting.

Known oblique support of street lighting according to British patent GB No. 2224292, class. Е04Н 12/18, published on 05/09/2002, bulletin No. 18, containing the base and the upper section. Their pairing in a vertical position occurs by entering part of the upper section into the nest of the lower section. To tilt, the upper section must be raised and then tilted. The disadvantage of the support is that it is impossible to perform a tilt operation without a lifting mechanism, this significantly narrows the scope of its application and complicates operation.

Known mast for street lighting according to the patent of Germany No. 2319877, class. Е04Н 12/8, published on 10/10/1981, Bulletin No. 41. The mast consists of a base, to which the upper part, which carries the lighting devices, is pivotally connected and is equipped with a mechanism for vertical raising and lowering of the hydraulic type with a control device mounted on the outside of the supporting part (adopted as a prototype).

The disadvantage of the mast is that the connector of the base and upper mast is made along a line perpendicular to the upper axis of the mast, and the hydraulic mechanism and balancing device are installed outside the mast base. The fastening of the swivel at the lower end of the upper part, at a great distance from its center of gravity, leads to a significant increase in the power of the mechanism for raising and lowering. These shortcomings increase the weight of the mast, increase the cost of manufacture and maintenance, since the lifting mechanism is constantly exposed to adverse effects, in addition, the aesthetic perception of the mast as an architectural element of the street, park, etc., is deteriorating.

The technical solution to the problem is to combine the balancing device with the top of the mast in a single design and place the mechanism for vertical lifting and lowering the top of the mast in the niche of the mast base at the level of convenient maintenance of the mechanism from the ground.

This problem is solved in that the mast for street lighting, containing the base and the upper part, pivotally connected, a mechanism for vertically raising and lowering the upper part, lighting devices, characterized in that the ends of the base and the upper part of the mast are made beveled at an acute angle and mated between along a broken gear line, while the hinge is located on the sharp top of the base, and the lifting and lowering mechanism is installed in the niche of the mast base and has a traction rope, which through the block Assumption in the cavities of the mast, connected to the lower end of the upper acute portion of the mast, the mast is set on the basis of the return spring, which eliminates the equilibrium of the upper part of the mast with lighting devices during the operation of the inclination.

The invention is illustrated in the drawing, which shows a mast for street lighting - General view.

The mast for street lighting consists of two parts: the base 1 and the upper part 2 with lighting devices 3. The ends of both parts are connected by a hinge 4 and articulate along the line of the connector 5, located at an acute angle 6 to the vertical axis of the mast. A mechanism 8 (a manual winch) is installed in a niche 7 of the base of the mast for raising and lowering the upper part 2, the traction rope 9 of the mechanism 8 is connected through the block 10 to the lower end of the upper part 2 of the mast. Based on 1, a return spring 11 is installed, and cables 12 are laid in the voids of the mast.

Installation and maintenance of the mast is carried out in the following sequence. The mast is installed on the foundation or in the pit in a prefabricated form. In the niche of the base 1, cables are laid and connected to electrical equipment and lighting devices 3. The performance of all mast nodes is checked.

When replacing light sources or repairing, the upper part of the 2 masts is lowered downward (dashed in the drawing). To do this, the traction rope 9 is released by mechanism 8 (hand winch), which through block 10 releases the lower end of the upper part 2. A return spring 11 installed on the base 1 pushes the end of the upper part 2 away from the mast axis, and since the center of gravity ( moment) of the upper part 2 lies higher from the hinge than the center of gravity of the lower (end) half of the upper part 2, then the upper part 2 under the influence of gravity rotates towards the ground, while the traction rope 9 is stretched and prevents a sharp fall of the upper part 2. Far The further tipping of the mast and its subsequent lifting to a vertical position is controlled by a mechanism.

Since the torque generated by the mast mass located above the hinge joint is approximately 10% greater than the torque of the end half of the upper part, it takes 10 times less force to lower and raise it to the vertical position than to turn the mast along prototype.

The mating line of the base 1 and the upper parts 2 of the mast is selected inclined to the vertical axis in order to create a counterweight and balance the halves of the upper part 2 relative to the axis of rotation in the hinge, and the mating line has a broken gear shape, which prevents slipping of the upper part 2 along the base 1 and reduces the load on the axis of the swivel.

The connection line between the base and the upper part can have another shape, for example, a zigzag, but the hinge should lie below the center of gravity of the entire upper part 2, and the end part should be a counterbalance.

The novelty of the proposed mast design for street lighting is that to reduce the power of the lifting and lowering mechanism of the upper part 2, its articulated connection to the base is located near the center of gravity so that its lower end half is a natural counterweight to the other upper half.

The placement of the lifting and lowering system inside the hollow mast protects the mechanism from adverse climatic conditions and mechanical damage or unauthorized use. This allows you to reduce the weight of the mast, the power of the lifting mechanism, improve the aesthetic appearance of the mast, increase the reliability of street lighting and reduce operating costs by eliminating the use of expensive lifting and handling equipment while improving working conditions and electrical safety.

Claims (1)

A mast for street lighting, comprising a base and a upper part, articulated, a mechanism for vertically raising and lowering the upper part, lighting devices, characterized in that the ends of the base and upper part of the mast are beveled at an acute angle and are interconnected along a broken gear line, while the swivel is located on the sharp top of the base, and the lifting and lowering mechanism is installed in the niche of the mast base and has a traction rope, which is connected through the block located in the voids of the mast inen with the lower sharp end of the upper part of the mast, and a spring is installed on the base of the mast, which unbalances the upper part of the mast with lighting devices when it is tilted.