SU1527380A1 - Friction-type pile-driving hammer - Google Patents

Abstract

The invention relates to the field of construction and is used to immerse piles and other elements in the ground. The purpose of the invention is to increase the efficiency of the operation by striking at intervals of time not exceeding the time of immersing the pile for the impact. The piling friction hammer includes a housing with guides 1 and a composite impact part 2. The opposite rollers 4 and 5 are mounted on the drive shafts one above the other on the shaft height. In each pair, one of the rollers is made with a sector ledge 6. The lifting of the composite impact part is carried out during rotation rollers and their interaction through projections with an appropriate mass of 3. At the same time, the radii of the sector projections are 6 rollers 5 with the same sector angles or the corners of the sectors with projections of the rollers 5 with the same radii of sector projections 6 in Full uvelichivayuschimis in the upward direction. The specified implementation provides the striking of the immersed pile at intervals of time due to the lifting of the masses to different heights while simultaneously resetting. Moreover, the time intervals between blows do not exceed the time of pile piling per blow. 4 il.

Description

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with sector protrusion 6. The composite impact part is lifted by rotating the rollers and their interaction through projections with a corresponding mass of 3. At the same time, the radii of the sector projections 6 of the rollers 5 at the same sector angles or the corners of the sectors with the projections of the rollers 5 with the same radii of the sectors

This invention relates to the field of

construction and can be used to immerse piles and other elements in the ground.

The purpose of the invention is to increase the efficiency of work by striking at intervals of time that do not exceed the time of the pile being poured for the blow.

FIG. 1 shows a diagram of a two-mass shock section before lifting, when performing rollers with sector protrusions with different sector angles; in fig. 2 - the same, after lifting the composite impact part to the extreme upper position; in fig. 3 - the same at the time of the fall of the composite drum; in fig. 4 is a diagram of the composite impact part before lifting, when performing rollers with sector protrusions having a different radius.

The hammer contains a housing with the direction of Juice 1 and a shock part 2, made of a composite of two or more masses 3

one above the other. Hit

Part 2 is mounted between opposite rollers 4 and 5, which are installed in pairs in height. Each of the pairs of rollers 4 and 5 is mounted with the ability to interact with one of the masses 3. One of the rollers in each pair, for example roller 5, is made with a sector ledge 6 used for lifting the impact part 2. The rollers 5 are mounted on the shafts of the drives 7. All the rollers 4 and 5 are located on the power structure of the housing 8. The protrusions 6 are made of wear-resistant material (for example, rubber-cord type) with a high coefficient of friction when clutch SRI part 2 with the shock.

The radii of the sector protrusions 6 rollers 5 with the same angles of sectors

273804

the protrusions 6 are made increasing in the bottom-up direction. This design provides for striking the immersed pile at time intervals due to the lifting of the masses to different heights and simultaneous dumping. Moreover, the time intervals between blows do not exceed the time JQ m immersed piles per blow. 4 il.

or the corners of the sectors with protrusions of the rollers 5 with the same radii of the sector protrusions 6 are filled with increasing in the bottom-up direction and are taken from the condition of ensuring the strikes of each of the masses 3 (upstream) at intervals of time not exceeding the pile immersion time for the impact. With simultaneous dumping of all masses 3 and the same speed of rotation of the rollers 5, the radii R of the sector protrusions 6 of the outwardly spaced rollers 5 at the same angles of all sectors are taken from the inequality

 I 2 90R /

.. (,.

where g is the radius of the sector protrusion 6 of the downstream nearby roller 5; t is the pile immersion time

a blow below the nearby mass of 3; g - free fall acceleration. In the case of the same radius Z

sector projections 6 corners of sectors with projections 6 of upstream rollers 5 (FIG. 1-3) are taken from another inequality

.

Z l90g where y is the angle of the sector with the protrusions 6 of the smelling nearby roller 5.

In these inequalities, the conditions r R and (f fi are necessary to provide a gap between the masses 3 before dropping them, i.e. striking the masses 3 at intervals of time (with a time gap, and conditions

.-l) (- 41) -:

five

so that these time intervals do not exceed the time of pile piling in one stroke.

The simultaneous discharge of all masses 3 of the impact part 2 is achieved by arranging the edges of the protrusions 6 of the rollers 5 along the edges of the protrusions 8 along radii parallel to each other.

The mass number 3 of the shock part 2 can be taken and more than two,

Svaeboinsky friction hammer works as follows.

When the drives 7 are turned on, the rollers 5 are synchronously rotated. After the protrusion 6 of each of the rollers 5 engages with the corresponding mass 3, the latter rises up. At different angles of the sectors with protrusions 6, the upper rollers 4 and 5 are the first to engage with the masses 3, therefore the upper mass 3 begins to rise first, with the upper mass 3 rising to a greater height than the lower one due to the fact that the angle ft Jf. different radii of the sector protrusions 6 last enter into engagement with each of the masses 3 at the same time (since the angles of the sectors are equal), however, in this case, the upper mass 3 rises to a greater height than the lower due to the fact that the radius R After leaving the engagement protrusions 6 rollers 5 that It is at the same time, due to the same speed of rotation of rollers 5 and positioning the trailing edges of the projections 6 at radii which are parallel to each other, the masses 3 under the action of gravity down pdayut sequentially strikes the submerged pile. The value of the first shock pulse in each series should be sufficient to break the pile, i.e. set it in motion. Then again the protrusions 6 of the rollers 5 are engaged with the masses 3, and a new working cycle of the hammer is repeated.

Thus, the immersion of the pile is carried out by a series of blows (the number of blows in each series is equal to the number of masses 3), and in each series - blows are struck at intervals of time that do not exceed the time of immersion per blow.

The rotational drive can be implemented with any energy source.

The implementation of the shock part of a mass, one above the other, interacting with lifting rollers equipped with sector protrusions and lifted to different heights while being simultaneously dropped, whereby mass strikes are applied at intervals (not simultaneously MSHHo), the impact force of each mass is limited , which leads to a decrease in the likelihood of premature destruction (under subsidence) of the pile. Ensuring the possibility of applying

5 strokes of the upstream masses in each series at intervals not exceeding the pile immersion time per blow causes a decrease in immersion resistance and

0 energy to install piles in

the ground by striking the masses against the moving pile (i.e., we are dealing with sliding friction forces, and not with the rest peace training forces). In aggregate, reducing the likelihood of premature pile destruction, as well as resistance to immersion and energy consumption for installation of a pile in the soil, allows for increased efficiency

0 hammer work.

Claims (1)

Invention Formula five 0 five 0 five Pile driving hammer friction co. holding body with guides and impact part located between the driving opposite rollers mounted in pairs in height, one of which in each pair is made with a sector ledge, characterized in that, in order to increase work efficiency by striking at intervals that do not exceed the time of the pile being pushed for a blow, the shock part is made up of a composite of masses placed one above the other, in contact with a pair of rollers corresponding to it, the starting points of contact of each of the sector heights The blunt heads of which are arranged in phase in pairs installed in height, and the rollers with sector protrusions are made with the same sector angle or with the same radius of the sector protrusion, while the sector radius of the protrusion of the stationary rollers with the same sector angle or sector angle with the protrusion of the rollers with the same radius sector protrusion is determined from the corresponding inequalities: - "l-l -. where r is the radius of the sector lug downstream roller; t is the pile immersion time hit lower down soy; R is the radius of the sector protrusion upstream roller; fti is the angle of the sector with a protrusion; g - free fall acceleration, or 90g J is the angle of the sector with the protrusion of the downstream roller; and - the angle of the sector with the protrusion of the upstream roller; Z is the radius of the sector protrusion. Fi9,3 I