RU61732U1 - SCREW DRIVING DEVICE - Google Patents

Abstract

The utility model relates to construction and can be used in the construction of bridge pylons, power lines (transmission lines), pylons of the contact network of electrified railways, cell towers, surface racks, moorings and other structures using screw piles. The objective of the proposed utility model is to increase the productivity of the device while simplifying the design and reducing the complexity of the screwing process, expanding the operational capabilities of the device, which consists in providing the possibility of immersion of a screw pile to the ground surface. The problem is solved due to the fact that the device for immersion of screw piles contains a base machine, on the platform of which a crane is mounted with a working body carrying a mechanism for screwing piles, and a rotary device for fixing and guiding screw piles in a vertical or inclined position. The pile screwing mechanism includes a powerful gearbox, driven by a hydraulic motor, and a cartridge, consisting of a sleeve with a through longitudinal groove, in which the axis with bearings is mounted in a horizontal position with the groove in the horizontal position, while the cartridge is mounted on the gearbox shaft through a hexagon, and the hydraulic motor with the gearbox is mounted vertically on the working body of the crane using two brackets connected by a cross, and the through longitudinal groove of the cartridge sleeve is reinforced with longitudinal plates. The proposed utility model will significantly reduce the complexity of the screwing process and increase the productivity of the device by more than 10 times compared with the prototype. Using the device allows the immersion of a screw pile to the very surface of the soil. 1 s.p. f-ly; 6 ill.

Description

The utility model relates to construction and can be used in the construction of bridge pylons, power lines (transmission lines), pylons of the contact network of electrified railways, cell towers, surface racks, moorings and other structures using screw piles.

The use of screw piles and anchors requires special installations and mechanisms. Such installations should be highly productive, reliable and maneuverable, providing a reduction in the time and cost of work on the construction of foundations on screw piles and various anchoring.

The development of rational foundation designs using screw piles and various anchorage for power transmission towers, radar facilities, cell towers and other objects stimulates the development of devices designed to immerse screw piles and anchors based on cross-country vehicles and all-terrain vehicles. So, the scientific research institutes Vniizmmash, Vniistroydormash developed and created prototypes of such machines, some of them (MZS-13, MZS-19, Anker) were produced by small experimental lots. Unfortunately, at present, the domestic industry does not produce such machines, which hinders the introduction into the construction of reliable and cost-effective foundations using screw piles.

Known machine MZS-13 (see V.N.Zhelezkov. Screw piles in the energy and other construction sectors. - St. Petersburg: PRAGMA, 2004, p.30-31), developed by the Leningrad branch of VNIIstroydormash on the basis of the car KRAZ-214 and designed for the construction of foundations on screw piles. Reinforced transverse mounted on the base machine

beams the frame on which the transmission of the drive of the working equipment is mounted, the hydraulic drive of the outriggers and the winch of forced deepening of the screw piles, as well as the controls and auxiliary equipment. The main working body of the machine is a pipe in which a movable carriage with a hydraulic winch is mounted. The rotation of the pipe is through the transmission from the engine. The pipe transmits rotation to the carriage with a pile fixed to it. In the process of screwing, the carriage with a hydraulic winch and pile along special guides goes down. With the help of a hydraulic winch, axial loading of the pile is created. The machine can develop a torque of 13 tcm (130 kNm) and immerse both vertical and inclined piles.

Also known is the MZS-19 machine (see ibid., P.31), which has a similar design, but differs in higher operational characteristics and a larger amount of torque.

Compared with MZS-13 and MZS-19, the Anker installation (see ibid., Pp. 31-32) developed by VNIIzemmash for the complex mechanization of the construction of screw pile foundations is more advanced. The unit is designed for screwing piles directly into the ground and drilling leader wells. The power of the Anker installation allows you to create a torque of 23 tcm (230 kNm) and immerse piles and anchors vertically and obliquely in all types of soils, including hard frozen and some rock formations. The Anchor installation consists of the following main units: a frame, a working body (pipe), two control panels, a pile elevator and outriggers. As the base car used KRAZ-257. The Anker installation has two independent drives of the working body: mechanical - for screwing piles and hydraulic - for drilling leader wells. The performance of the Anker plant reaches 12 piles per shift. The greatest depth that a pile can be immersed without interrupting screwing is 6 meters.

It should be noted that all the devices described above can only screw piles with additional vertical loading with a torque of 10-12 tcm, and they have very complex loading mechanisms.

A significant drawback of the devices is the fact that in case of a malfunction of the rotation mechanism, they become “chained” to the pile, since the car cannot move away from the place of screwing and the pile to be immersed must be cut down.

It is also known a device for immersing the working body in the ground (see RF patent No. 2045624, class IPC 6 E 02 D 7/22, publ. 1995.10.10), which can be used in construction, as well as when laying main pipelines for drilling wells and screw screw anchors and piles. The device consists of a base machine with an arrow, a handle and a tip. The arrow head is pivotally connected by levers to a rotator equipped with a working body. The handle of the machine is connected to the lever using a hydraulic cylinder. A feature of the known device is that the hydraulic cylinder is controlled by a stabilizer, which is mounted on a rotator. The stabilizer consists of a distributor and a plumb, which is pivotally mounted by means of a roller on the axis. The stabilization of the vertical stroke of the working body is carried out by the said stabilizer, which operates on the principle of the Earth's attraction mechanism. When the working body is immersed in the soil, the head with the arrow makes a circular motion. As a result, the rotator tends to deviate from the vertical. The plumb line, which always remains vertical, deflects the handle of the distributor, as a result of which the hydraulic fluid is sent to the hydraulic cylinder, which, acting on the lever system, brings the rotator with the working body to the vertical position.

A disadvantage of the known device for immersing the working body in the soil is the complexity and cumbersome control system

stabilizer hydraulic cylinder, which leads to low reliability of the entire device during operation.

The closest in technical essence to the proposed utility model is an installation for screwing UZS piles (see V.N.Zhelezkov. Screw piles in the energy and other construction sectors. - St. Petersburg: PRAGMA, 2004, p. 32-33), the design of which incorporated the technical solution for ed. testimonial. USSR No. 767285, cl. IPC 3 E 02 D 7/22, publ. 09/30/80, selected as a prototype.

The UZS screw piling dipping installation is intended for the construction of inventory foundations under the supports of temporary high-water bridges and provides the possibility of carrying out work both on land and on water using a ferry. The installation comprises a base machine, on the platform of which lifting stands are installed, pivotally attached to the platform at one end and with the help of fixing racks installed on the edge parts of the platform with the other. Stands are equipped with guides in which rotary devices with screwing mechanisms are mounted with the possibility of movement. On the base machine platform and in the lifting supports, bushings are installed for guiding the piles. An arrow is also installed on the platform of the base machine with crane devices carrying screwing mechanisms, which are hydrobestans, which provide for simultaneous screwing of two piles vertically or obliquely at an angle from 15 ° to 30 °. Each hydrobestan develops a torque of 5.0 topics (50 kNm).

The main structural feature of hydrobestants, which compares favorably with other similar mechanisms, is the use of split hinged couplings, which allow quick and convenient driving of piles into the side couplings, providing a significant reduction in time for preparatory work.

However, the known device, selected as a prototype, provides the ability to immerse piles of only one diameter corresponding to the inner diameter of the cage of the screwing mechanism. In addition, a significant drawback of the known device is the impossibility of immersing piles to the soil surface, which is due to the design feature of the installation, namely, the significant height of the arrangement of screwing mechanisms (hydrobestants) relative to the platform of the base machine. The disadvantages of the device should also include a relatively small amount of developed torque, as well as insufficient lifting capacity of crane equipment.

These shortcomings significantly limit the functional and operational capabilities of the device - the prototype, and, in addition, are the reason for its low productivity.

The objective of the proposed utility model is to increase the productivity of the device by increasing the speed of immersion of piles while simplifying the design and reducing the complexity of the screwing process. Another important task posed in the development of the claimed utility model is to expand the operational capabilities of the device, which consists in providing the possibility of immersion of a screw pile to the surface of the soil.

To achieve the technical result, a device for immersing screw piles is proposed, which, like the one closest to it, selected as a prototype, contains a base machine, on the platform of which a crane with a working body carrying a mechanism for screwing piles, and a rotary device for fixation and direction of screw piles in a vertical or inclined position.

A feature of the proposed utility model, which distinguishes it from a known device selected as a prototype, is that the mechanism for screwing piles includes a powerful gearbox driven by a hydraulic motor, and a cartridge consisting of a sleeve with a through

a longitudinal groove in which an axis with bearings is mounted in a horizontal position with the possibility of movement along the groove. The screwing mechanism cartridge is mounted on the gearbox shaft through the hexagon, and the gearbox is mounted vertically on the working body of the crane using two brackets connected by a cross. To increase the rigidity of the cartridge sleeve of the screwing mechanism, its through longitudinal groove is reinforced with longitudinal plates.

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

In the claimed utility model, a device for immersing screw piles is proposed, which contains a fundamentally new screwing mechanism. Unlike the prototype, in which hydrocobestan is used as the screwing mechanism, the claimed screwing mechanism is a hydraulic motor with a powerful gearbox having a large gear ratio. Due to this, the torque transmitted to the screw pile increases to 8-10 tcm. The result of this is an increase in the speed of immersion of the screw piles, and, consequently, the productivity of the entire device, which was the main task posed when creating a useful model. The pilot tests of a device for immersing screw piles showed that productivity, that is, the speed of immersion, increased by more than 10 times compared to the prototype installation, which uses hydrobestan as a screwing mechanism.

An important essential feature of the utility model is also the newly developed screwing mechanism cartridge, the structural elements of which (a sleeve with a longitudinal groove, an axis with bearings) provide a reliable direction, vertical or inclined, to the screwing point, as well as screwing the piles to the ground surface. In the prototype, this was not possible.

It should also be noted that the signs related to the design of mounting the engine with gear to the working body of the crane, and

namely: two brackets connected by means of a crosspiece, provide the mechanism of screwing piles four degrees of mobility. This increases the accuracy and speed of manipulation of the working body in the process of capturing piles, pointing them to a picket, etc., and, consequently, there is a decrease in labor intensity and an increase in productivity of the process of immersing piles in soil.

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

Below is described one of the specific examples of the implementation of the proposed utility model.

The utility model is illustrated by drawings, on which:

figure 1 - a device for immersion screw piles (General view);

figure 2 is a view And figure 1 with an additional image of a screw pile, immersed at an angle to the vertical;

figure 3 - the mechanism of screwing piles;

figure 4 is a view of B in figure 3;

figure 5 - rotary device for fixing and guiding the screw piles in a vertical or inclined position;

figure 6 is a view In figure 5.

A device for immersing screw piles consists of a base machine (car, tractor, all-terrain vehicle, etc.) (see Figs. 1, 2), on the platform 1 of which a manipulator 2 is mounted (or another device having at least four degrees of working mobility body) with the working body 3 and the mechanism of screwing piles. The pile screwing mechanism (see Figs. 3, 4) consists of a hydraulic motor 4 with a powerful gearbox 5 and a cartridge mounted on the shaft of the gearbox 5 through the hexagon 6. The screwing mechanism cartridge consists of a sleeve 7 in which a through longitudinal groove is made 8. In the groove 8, the axis 9 with bearings 10, 11 is installed in a horizontal position. Through the axis 9, which can move along the groove 8, the torque from the powerful gearbox 5 is transmitted to the screw pile. Longitudinal groove 8 bushings 7

the cartridge is reinforced with longitudinal plates 12. A hydraulic motor 4 with a gearbox 5 is mounted on a working body 3 of a crane 2 in an upright position using two brackets 13 and 14 connected by a crosspiece 15. This connection provides at least four degrees of mobility of the working body 3. On the platform 1 a rotary device 16 is also mounted on the base machine (FIGS. 5, 6) for fixing and guiding screw piles in a vertical or inclined position. The rotary device 16 consists of a guide pipe 17 with holes provided with a support flange 18, which is fastened to the platform 1 of the base machine by means of a bolt connection. In the guide pipe 17 includes an inner pipe 19 with holes, which serves to move the pile vertically and its inclination at an angle from 15 ° to 30 °. A pull-down sleeve 20 is welded to the inner pipe 19, with the help of which the pile is installed and fixed in a vertical or inclined position.

The inventive device for immersion screw piles can be implemented on the basis of high cross-country vehicles (excavators, tractors, all-terrain vehicles, etc.), manufactured by domestic industry. The hydraulic motor and gearbox, as well as a crane with boom, are serially produced by Stroydormash Plant OJSC (Russian Federation, Sverdlovsk Region, Alapaevsk).

A device for immersion screw piles works as follows.

Before the start of the cycle, the screw pile 21 is removed from the platform 1 with the help of a crane 2 and is installed in the opening sleeve 20 of the rotary device 16 mounted on the platform 1 to ensure a stable position. Then, a screwing mechanism cartridge is put on the pile, in which the pile 21 through a longitudinal groove 8 is fixed with the help of axis 9 with bearings 10, 11. The cycle starts with pointing the screw pile 21 to the screwing point (picket). By manipulating workers

body 3 screw pile 21 is installed in a vertical or inclined position. The rotation of the hydraulic motor 4 is turned on and the screw pile 21 begins to sink, while the gearbox 5 should be in the same position (the distance to the ground should not change), and the axis 9 with bearings 10, 11 moves along the groove 8, transmitting torque to the screw pile 21. The screw pile 21 rotates until the axis 9 with bearings 10, 11 abuts against the lower edge of the longitudinal groove 8. The rotation stops and, by manipulating the working member 3, the gearbox 5 with the chuck is lowered along the screw pile 21 until the axis 9 s bearings 10, 11 will not touch the upper edge of the groove 8, after which the rotation of the cartridge is switched on again. The cycle is repeated until the screw pile 21 is completely screwed to the design mark.

The above described device for immersion screw piles can also be effectively used for screwing up drills.

Thus, in the proposed utility model, by increasing the speed of immersion of piles, it was possible to significantly reduce the complexity of the screwing process and increase the productivity of the device by more than 10 times in comparison with the prototype. In addition, the use of the device allows immersion of the screw piles to the very surface of the soil.

Claims (2)

1. A device for immersion screw piles containing a base machine, on the platform of which a crane is mounted with a working body carrying a mechanism for screwing piles, and a rotary device for fixing and guiding screw piles in a vertical or inclined position, characterized in that the mechanism for screwing piles includes a powerful gearbox driven by a hydraulic motor, and a cartridge consisting of a sleeve with a through longitudinal groove, in which it can be moved horizontally along the groove an axis with bearings, while the cartridge is mounted on the gearbox shaft through a hexagon, and a hydraulic motor with gearbox are mounted vertically on the working body of the crane using two brackets connected by a cross. 2. The device for immersion screw piles according to claim 1, characterized in that the through longitudinal groove of the cartridge sleeve is reinforced with longitudinal plates.