RU9408U1 - PIPE CUTTER - Google Patents

Abstract

1. A pipe cutter comprising a trolley, a cutting tool mounted on a trolley, a drive having a motor rigidly connected to each other and a transfer case with two output shafts: the first for driving the cutting tool and the second for driving the trolley, cutting tool cutting mechanism and clamping mechanism with a tensioner, characterized in that the cutting tool is mounted via a spindle on the first output shaft of the transfer case, and the transfer case is mounted by means of pins on the trolley with the possibility of rotation that (swing) with respect to it, and the cutting tool and the insertion mechanism mounted on opposite sides of tsapf.2. Pipe cutter according to claim 1, characterized in that the pins for installing the transfer case are made on its second output shaft. Pipe cutter according to claim 1, characterized in that the elastic element of the tensioning device is made in the form of a torsion bar. The pipe cutter according to claim 1, characterized in that the clamping mechanism is made in the form of two guide chains, and the driving elements of the trolley are made in the form of sprockets mounted on the second output shaft of the transfer case. The pipe cutter according to claim 4, characterized in that it is additionally equipped with a device for changing its support base depending on the diameter of the pipe being cut, having an axis on which the driven supporting wheels of the carriage are fixed, and nests with grooves for passing flats are made in the walls of the carriage body made on the specified axis.

Description

The utility model relates to the processing of metals by cutting, more precisely, to devices for mechanical cutting of pipes. It is intended primarily for use in the construction and repair of trunk pipelines, but can be used in other areas as well - for cutting hollow tanks.

Known pipe cutter a. with. SSOR N 1366324, MKI4 B23D 21/06, containing TV-set: y, a tool mounted on the trolley, a drive having an engine and a transfer case with two output shafts: the first for driving the cutting tool and the second for driving the trolley, the cutting machine clamping mechanism with tensioner.

In this pipe cutter, the source of energy is an electric motor, the B1L of which is connected to the input shaft of the transfer case through a chain transmission.

, the tool is mounted in a separate box that has been handed out, and the caliper, which has the ability to rotate from the screw-in plunge mechanism. The cutting tool is driven in rotation from the first output shaft of the transfer case through an additional gear transmission.

The clamping mechanism is made in the form of two guiding chains, each of which has its own tension device, made in the form of a screw pair. To carry out the movement of the pipe cutter along the guide chains during the cutting process, there are leading sprockets driven in rotation from the second output shaft of the transfer case. Guide chains during cutting

B23D 21/00, 21/04, 21/06 PIPE CUTTER

Do not move relative to the pipe.

The chain transmission between the motor shaft and the input shaft of the transfer case, as well as the caliper and additional gear transmission for cutting the cutting tool, EXTEND the design of the pipe cutter.

The specified disadvantage is partially eliminated in the pipe cutter along a. with. USSR N1620223, ЖИ5 B23D 21/04), containing a trolley mounted on trolley 1, a tool, an actuator having a motor rigidly connected to each other and a transfer case with two output shafts: the first for driving the cutting tool and the second - for driving a trolley, a cutting tool cutting mechanism and a clamping mechanism with a tensioning device.

In this pipe cutter, the motor shaft is connected to the input shaft of the transfer case directly, without an intermediate gear, which simplifies the design of the pipe cutter in comparison with the pipe cutter-analogue in a. with. USSR N 1366324.

The movement of the pipe cutter along the perimeter of the pipe being cut is carried out due to the driving support wheels driven from the transfer case and pressed to the surface of the pipe being cut by means of the guide chain. When cutting, the guide chain moves with the trolley.

Cutting tool in a pipe cutter according to a. with. N 1620223 as well as in the pipe cutter according to a. with. N 1366324 mounted in a caliper separate from the transfer case, which can be rotated to cut the cutting tool into the pipe wall. The insertion mechanism is made in the form of a worm pair, the worm being mounted on the transfer case body, and the worm sector on the support.

The presence of a caliper in this pipe cutter, for the cutting tool and intermediate gears for transferring rotation from the drive 1; the first shaft of the transfer case to the cutting tool complicates the design of the pipe cutter, correspondingly increasing the cost of its manufacture and assembly and complicating operation.

According to its technical essence and the achieved result, the pipe cutter according to a. with. N 1620223 is the closest to the claimed utility model and can be taken as a prototype.

The objective of this utility model is to create a pipe cutter having a simpler design compared to the prototype and, accordingly, more convenient in operation and more economical.

The problem is solved due to the fact that in the pipe cutter containing the trolley, there is a tool mounted on the trolley, a drive having a motor rigidly connected to each other and a transfer case with two output shafts: the first to drive the cutting tool and the second to drive the trolley, mechanism cutting tool and clamping mechanism with a tensioning device, the cutting tool is mounted via a spindle on the first shaft of the transfer case, and the transfer case is mounted by means of pins on the trolley with Stu pivot (swing) relative thereto, wherein rezhu-conductive tool infeed mechanism and mounted on the different STS-Rhone of trunnions.

The pins for mounting the pc1 transfer case can be made on its second output shaft.

The elastic element of the tensioning device can be made in the form of a torsion bar.

lyayupshch chains, while the leading elements of the trolley can be made in the form of asterisks mounted on the second output shaft of the transfer case.

The pipe cutter can be equipped with a device for changing its support base depending on the diameter of the pipe being cut, having an axis on which the driven supporting wheels of the cart are fixed, while nests with grooves for passing flats made on the indicated can be made in the walls of the cart. axis.

Securing the cutting tool by means of a spindle on the first output shaft of the transfer case, mounting the case of the transfer case on the pins, as well as installing the cutting tool and the plunging mechanism on different sides) from the pins .-. turning the case of the transfer case (together with the engine) relative to the trunnions and, thereby, block it from the construction1., and the pipe cutter an intermediate gear with all the elements of its installation and fasteners s

The implementation of the pins for installing the transfer case on its second output shaft eliminates the need to perform these pins directly on the case of the transfer case and helps simplify the design.

The execution of the elastic element of the tensioning device in the form of a torsion contributes to the reliable operation of the tensioning device.

The execution of the clamping mechanism in the form of two guiding chains and the corresponding design of the leading cart elements in the form of sprockets and support wheels fixed on the second output shaft of the transfer case allow more accurate cutting than the execution of this mechanism in the form of a single 4-chain and the corresponding implementation of the driving elements of the cart and in the form of support wheels.

Supply the pipe cutter with a device for changing its support base, depending on the diameter of the pipe being cut, having an axis. on which the driven supporting wheels of the body are fixed} yak, and, and the implementation of the body of the carriage and the nests with grooves in the walls of the housing, allows you to quickly transfer the pipe cutter from cutting pipes of one diameter to cutting pipes of other diameters.

The possible embodiment of the utility model is illustrated in the drawing, where:

in FIG. 1 shows a general view of a pipe cutter (thin lines indicate a pipe being cut);

in FIG. 2 is a view A in FIG. 1;

in FIG. 3 is a section BB of FIG. 2;

in FIG. 4 is a section BB of FIG. 1;

in FIG. 5 is a section G-D of FIG. 1;

in FIG. 6 section DD DD of 4;

in FIG. 7 - transfer case;

in FIG. 8 is a view E of FIG. 7;

in FIG. 9 is a kinematic diagram.

The pipe cutter contains a trolley 1 (Fig. 1), an engine 2 and a transfer case 3 mounted on a trolley, a plunge mechanism, a clamping mechanism, a device for changing the support of a pipe cutter for pipes of different diameters and tensioning devices.

The engine 2 is mounted on the housing of the transfer case 3 by means of studs 4 (Fig. 7).

The transfer case 3 has a first output shaft 5, at the end of which a spindle b is mounted for the cutting tool. As a cutting tool in the presented embodiment

- I used cutter 7 (in other cases, an abrasive disk can be used). On the second output shaft 8 (Fig. 1.8) of the transfer case, drive sprockets 9 (Fig. 1) and support wheels are fixed 10. The second output shaft also has pins 11 (Fig. 8) for installing the transfer case in the trolley case (in others trunnion versions can be made on the walls of the trolley case).

The insertion mechanism has a screw 12 (Fig. 3) and a nut 13 pivotally mounted on an arm 14 (Fig. 7.8) of the transfer case body 3.

The clamping mechanism is made in the form of two sleeve-roller guide chains 15 (Fig. 2), covering the leading 9, driven 16 and intermediate sprockets 17,18,19 (in other embodiments, the clamping mechanism can have only one chain, as in the prototype pipe cutter by A.S. USSR N 1620223).

A device for changing the support base of the pipe cutter when cutting pipes of different diameters has an axis 20 (Fig. 4) with flats 21 (Fig. B), on which driven sprockets 16 and support wheels are mounted 22. Axis 20 is installed in sockets 23 (Fig. 6) made in the walls of the housing of the trolley, and is fixed by means of dowels 24 and screws 25.

Each tensioning device has a screw 26 (Fig. 1,5), a nut 27, a lever 28, and a torsion 29. One end of the torsion 29 is rigidly fixed to the wall of the trolley case, and a lever 28 is mounted at its other end, pivotally connected to the nut 27 (Fig. . 5).

Pos. 30, the shift handle, pos. 31 - a protective casing, pos. 32 - device for supplying cutting fluid (coolant), pos. 33 - cut pipe.

- b Depending on the diameter of the pipe being cut, an axis 20 with supporting wheels 22 and sprockets 16 is installed in one of the pairs of sockets 23 and fixed with keys 24 and screws 25, after which the pipe cutter is installed on the surface of the pipe being cut 33 with supporting wheels 10 and 22.

The chains 15 cover the pipe 33 to be cut and tuck them into the pipe cutter sprockets, after which the chains 15 are tensioned uniformly by the tensioning devices, acting on the nuts 27. When the chains 15 are tensioned, the moment arising from the chain tension force is perceived by the torsion bars 29.

The milling cutter 7 is fixed on the spindle b. The direction of rotation of the milling cutter 7 should be set in accordance with the movement of the pipe cutter.

Turn on the electric motor. The movement from the electric motor through the first output shaft 5 and the spindle 6 is transmitted to the milling cutter 7. Turning the nut 13 of the plunging mechanism, drains and rotates (in Fig. 1 - counterclockwise) the transfer case with the electric motor relative to the pins 11, cutting the milling cutter 7 into the wall of the cut pipe 14, then the handle 30 include a second output shaft 8.

Leading sprockets 9 begin rotation, rolling around on stationary chains 15, due to which the pipe cutter is moved around the perimeter of the pipe and the pipe is cut. During operation of the pipe cutter, coolant is supplied to the cutting zone by device 32 to cool the cutter.

In order to avoid jamming of the cutter 7, wedges are driven into the cut (not shown in the drawings).

After the cut, the tensioning device is returned to its original position and the chains 15 are dismantled, and then the pipe cutter is removed from the pipe.

- 7 The inventive pipe cutter, having a simpler (in comparison with the known pipe cutters) design, has small dimensions, is convenient in operation, economical and ensures, as shown by tests, high quality cutting.

- eight

Claims (5)

1. A pipe cutter comprising a trolley, a cutting tool mounted on a trolley, a drive having a motor rigidly connected to each other and a transfer case with two output shafts: the first for driving the cutting tool and the second for driving the trolley, cutting tool cutting mechanism and clamping mechanism with a tensioner, characterized in that the cutting tool is mounted via a spindle on the first output shaft of the transfer case, and the transfer case is mounted by means of pins on the trolley with the possibility of rotation that (swing) with respect to it, and the cutting tool and the insertion mechanism mounted on opposite sides of the pins.  2. The pipe cutter according to claim 1, characterized in that the pins for installing the transfer case are made on its second output shaft.  3. The pipe cutter according to claim 1, characterized in that the elastic element of the tensioning device is made in the form of a torsion bar.  4. The pipe cutter according to claim 1, characterized in that the clamping mechanism is made in the form of two guide chains, and the driving elements of the trolley are made in the form of sprockets mounted on the second output shaft of the transfer case. 5. The pipe cutter according to claim 4, characterized in that it is additionally equipped with a device for changing its support base depending on the diameter of the pipe being cut, having an axis on which the driven supporting wheels of the carriage are fixed, and nests with grooves are made in the walls of the carriage body passage of flats made on a specified axis.