RU26058U1 - DEVICE FOR TIGHTENING SCREW PILES - Google Patents

Description

OPP21119883

. "Tiii" "" "" i ™ Mffl

jiiiflmiiffii

DEVICE FOR TIGHTENING SCREW PILES

The utility model relates to construction and can be used in the design of mechanisms designed for screwing screw piles.

Scientific research and production experience with the use of screw piles have confirmed their technical and economic feasibility. The initial costs of manufacturing such piles are largely paid off due to the possibility of their subsequent unscrewing. These advantages make screw piles a leading place in those sectors of construction where the time spent on immersion, versatility of application, bearing capacity, reliability in work and the possibility of their repeated use are of paramount importance. In this regard, the task of improving the structural solutions of pile screwing mechanisms is of particular relevance.

A device 1 is known for screwing screw piles. The device comprises a housing with a holder inside with a vertical longitudinal grooves and a hollow sleeve on the inside of which helical guides are formed. The coupling is made integral, mounted on the housing using elastic elements and connected to the cage by means of gear clutch. The disadvantage of device 1 is the complexity of the kinematic scheme of its drive, due to the continuity of the screwing process.

IPC 7 E 02 D 7/22

a clip having longitudinal grooves, and drive disks that are connected by rods to the hydraulic cylinder, as well as a load mechanism. To increase productivity, the load mechanism is made in the form of two bushings with an external screw thread, rigidly connected to drive disks. The body of the device is equipped with two fixed couplings having an internal screw thread interacting with the load bushings. The disadvantage of the known device 2, as described above, the device 1, is, in addition to the complex kinematics of the drive, the unsuccessful design of switching the ratchet mechanism using dogs. This design creates an increased danger for personnel servicing the installation.

A device 3 for immersing screw piles is known, which comprises a rod with a headgear, a sleeve and a flywheel freely mounted on the rod. The teeth are made on the surfaces of the flywheel and headrest. The device is equipped with a rotation drive, as well as a flywheel lifting mechanism, which is kinematically connected with the sleeve. The rotation drive shaft is coaxially connected to the shaft interacting with the flywheel by means of a key coupling. The rod is mounted on the headgear, and the sleeve is mounted on the flywheel with the possibility of rotation. The disadvantages of the known device 3, which is inertial, include its large metal consumption, as well as the complexity of the kinematic circuit of the flywheel drive.

The closest in technical essence to the proposed utility model is a device 4 for dipping screw piles, selected as a prototype. The known device 4 contains a ratchet clutch located between the base plates, and consisting of a cylindrical cage with longitudinal grooves and ratchet wheels fixed to it, each of which is made of two gear discs rigidly connected to each other. The teeth of one of the discs are oriented clockwise, and the teeth of the other disc are oriented counterclockwise

arrows. The device 4 is equipped with a hydraulic cylinder, the rod of which is equipped with a rotary cross-shaped element with cylindrical stops of different lengths. The stops interact with the corresponding ratchet wheels. The design has a number of advantages in comparison with the analogues described above. This is, first of all, the cyclical nature of the process of screwing piles, due to which it was possible to significantly simplify the kinematics of the device. The original design is a cross-shaped element connected with a rod of a hydropod, a rotation cylinder and having the ability to rotate relative to the longitudinal axis. For one turn of the pile, five cycles are carried out. The screwing mechanism has high reliability. However, the disadvantages of the known device 4 should include the fact that the design of its ratchet clutch provides for the installation and twisting of piles having a certain geometry of their outer surface, namely:

ribs of a specific configuration corresponding to the shape of the longitudinal grooves of the cage,

diameter corresponding to the inner diameter of the cage (or slightly smaller).

In addition, the disadvantage of the device 4 is that in the process of screwing the piles, the mechanism moves along the guides having a fixed length determined by the length of the guide, and therefore the entire device 4 has a large overall size and weight. These shortcomings significantly limit the operational and functional capabilities of the device - the prototype and are the reason for its low productivity.

The objective of the proposed utility model is to expand operational capabilities, increase the productivity of the device and reduce the complexity of the screwing process, while significantly simplifying the design of the device, reducing its size and weight.

(

To achieve this technical result, a device for immersing screw piles is proposed, which, like the one closest to it, selected as a prototype, contains a ratchet clutch located between the base plates. The ratchet clutch consists of a cage with longitudinal grooves and two pairs of ratchet wheels fixed to it. The device also contains a hydraulic cylinder of rotation, the rod of which is equipped with a cross-shaped element rotatable relative to the longitudinal axis with stops having different lengths, interacting with the corresponding ratchet wheels. A feature of the proposed utility model that distinguishes it from the known device 4, adopted as a prototype, is that the ratchet ferrule is equipped with replaceable tubular inserts. The insert may be provided with a flange with holes. In this case, longitudinal projections are made on the outer surface of the insert, mating with the longitudinal grooves of the cage, while the cylindrical part of the insert is provided with a pair of coaxial holes. The insert can be made in the form of a pipe equipped with at least two pairs of sauce holes. The replaceable insert can also be made in the form of two half-cylinders with supporting shoulders.

The technical result achieved in the proposed utility model is obtained due to the following.

As mentioned above, the prototype device provides screwing of piles with two longitudinal ribs on the outer surface, and the diameter of the piles should be equal to the diameter of the inner hole of the cage of the ratchet clutch. The introduction to the design of the proposed device of replaceable tubular inserts of various configurations makes it possible to screw piles equipped with a flange (see paragraph 2 of the utility model formula), piles with a smooth trunk equipped with one hole, piles with a smooth trunk having a large number of holes located throughout the length of the pile shaft with the step size corresponding to the step

helical blades (see paragraph 3 of the utility model formula). The removable insert in the form of two half-cylinders, proposed in Section 4 of the utility model formula, also extends the functionality of the device, making it possible to screw piles with a large range of trunk diameters (from 300 to 400 mm).

A significant advantage of the proposed utility model is also that the screwing and unscrewing of piles is carried out continuously, and not cyclically, as it was in the prototype. As a result, there is no longer a need for a lifting mechanism for moving the device along rails having a certain fixed length. The design of the device as a whole has been greatly simplified, it has become more compact. The proposed mechanism can be used on the basis of cars, skidders. It is easily mounted on any lifting devices, for example, on hydraulic excavators and cranes as a removable attachment.

Thus, the combination of the above features allows us to solve the tasks.

The utility model is illustrated by drawings, which depict:

in FIG. 1 - the proposed screwing mechanism with an insert provided with a flange, in accordance with paragraph 2 of the utility model formula (general view);

in FIG. 2 is a section AA in FIG. 1;

in FIG. 3 - insert with a flange, in accordance with paragraph 2 of the formula of the utility model, (axial section);

in FIG. 4 is a plan view of FIG. 3;

in FIG. 5 - assembly of the cage assembly with a tubular liner, pile and fingers transmitting torque;

in FIG. 7 - assembly of the cage assembly with an insert in the form of two half-cylinders, in accordance with paragraph 4 of the utility model formula; FIG. 8 is a section BB of FIG. 7;

in FIG. 9 is a diagram of an installation of a screw pile screwing mechanism on an excavator.

The device for screwing screw piles (hydrobestan) consists of a ratchet coupling, which is located between the base plates 1 and 2. The ratchet coupling is a cylindrical sleeve 3 with longitudinal grooves 4 (see Fig. 2) and two pairs of ratchet wheels fixed on it. Each pair is made in the form of interconnected gear discs 5 and 6. A removable insert 7 is installed in the clip 3 of the ratchet clutch. The design of the insert is shown in FIG. 3 and 4. The insert 7 is fixed in the cage 3 using the locking pin 8, passing through the holes 9 (see Fig. 3) in the insert 7. On the outer surface of the insert 7 there are longitudinal projections 10 (see Fig. 4), which are included in the grooves 4 of the holder 3, preventing the rotation of the liner 7 relative to the holder 3. For fastening piles, the liner 7 has a flange 11 with four holes 12 for mounting elements. The rotation of the piles is drained; it is from the hydraulic cylinder 13, the rod 14 of which is equipped with a cross-shaped element with stops 15, 16, which have different lengths and interact with the corresponding ratchet wheels. In the considered example, the transmission of torque from the cage 3 of the ratchet clutch to the pile is carried out through the protrusions 10 of the insert 7, interacting with the grooves 4 of the cage 3. An insert with a flange of the above construction can be used when installing piles with flanges used as foundations for the supports of the electrified contact network railways.

For screwing cylindrical piles with a smooth trunk and a large number of holes located along the entire length of the pile shaft with a step size corresponding to the pitch of a screw blade, designed for foundations under power lines, can be used

the liner in the form of a pipe 17 (see Fig. 5, 6), in the upper part of which there is a pair of coaxial holes. These holes serve to secure the liner 17 and piles 18 in the ratchet ferrule 3, which is carried out using the fixing pin 19. In this example, corresponding to paragraph 3 of the utility model formula, the torque is transmitted from the ratchet ferrule 3 to the pile through special fingers 20. The fingers pass through holes whose axes are parallel to each other and are arranged in increments corresponding to the pitch of the screw blade.

When screwing piles, the diameter of which is much smaller than the inner diameter of the ratchet sleeve, a liner is provided, which consists of two half-cylinders with supporting shoulders. In this example, corresponding to paragraph 4 of the utility model formula, the liner consists of two half-cylinders 21 (see Figs. 7, 8) having supporting shoulders 22. In the assembled state, a gap is formed between the half-cylinders 21, which includes the fingers 23 that transmit torque from the clip 3 of the ratchet clutch to the pile 24.

The installation diagram of the screw pile screw mechanism on the lifting mechanism of the excavator is shown in FIG. 9. The diagram shows the following main nodes:

25- excavator;

26- excavator boom;

27- boom handle;

28 - additional fastener, which is installed on the mounting holes of the handle 27 of the boom 26;

29- screwing mechanism (hydrobestan);

30 - a pile installed in hydrobestant;

31- hydraulic cylinder, providing a change in the position of the boom 26; 32 - a hydraulic cylinder designed to rotate the hydrobestan 29 when screwing screw piles at an angle (within 30 - 40 °). The device operates as follows.

.thirteen

From the load-lifting mechanism 25 (see Fig. 9), for which, for example, the EK-18 excavator can be used, the bucket is removed and an additional fastening element 28 with hydrobestan 29 is installed on the landing holes of the excavator. 3 In advance, the cage 3 of the ratchet coupling of hydrobestan 29 in advance a removable liner is installed, corresponding to the design of the pile intended for screwing. The boom 26 of the excavator 25 is aided; the hydraulic cylinder 31 is lowered along the ground and the pile shaft 30 is inserted into the ratchet sleeve of the hydrobestan 29, which is attached to the insert of the screwing mechanism. After that, with the help of the boom 26, the pile 30 is installed in a vertical or inclined position and the hydraulic system is turned on, which ensures that the pile 30 is screwed to the required depth. The dry pile ability is determined by the amount of torque at the end of screwing.

Thus, due to the necessary set of interchangeable inserts of various configurations, the proposed utility model provides the expansion of the device's operational capabilities and increase the productivity of the process of sinking screw piles, while reducing the complexity of the work, while significantly simplifying the design of the device, as well as reducing its size and weight.

USED SOURCES:

1.Avt.svid. No. 395546, class E 02 D 7/22, publ. 1973

2.Avt.svid. .NO 574503, CL E 02 D 7/22, publ. 1977

3.Avt.svid. .№ 1604933, cl. E 02 D 7/22, publ. 1990 g.

4.Avt.svid. .№ 1726656, cl. E 02 D 7/22, publ. 1992 - a prototype.

Claims (4)

1. A device for screwing screw piles, comprising a ratchet coupling located between the support plates, consisting of a cage with longitudinal grooves and two pairs of ratchet wheels fixed to it, a rotation cylinder, the rod of which is provided with a cross-shaped element with stops of different lengths that rotate relative to the longitudinal axis, interacting with the corresponding ratchet wheels, characterized in that the ratchet ferrule is equipped with replaceable tubular inserts.  2. The device according to claim 1, characterized in that the liner is provided with a flange with holes, longitudinal projections are made on the outer surface of the liner, coupled with the longitudinal grooves of the cage, while the cylindrical part of the liner is provided with a pair of coaxial holes.  3. The device according to claim 1, characterized in that the replaceable liner is made in the form of a pipe equipped with at least two pairs of coaxial holes. 4. The device according to claim 1, characterized in that the interchangeable liner is made in the form of two half-cylinders with supporting shoulders.