RU129032U1 - PIPE CUTTING DEVICE - Google Patents

Abstract

1. A device for cutting pipes containing the upper half housing and the lower half housing connected by articulated bolts, an electric motor with a pinion gear and a reducer, mounted on a frame connected to the upper half housing, a gear wheel consisting of two halves connected together by clamping devices mounted on supporting rollers in the upper half-housing and lower half-housing and made with the possibility of engagement with the drive gear, the tipper unit, tool holders installed in the caliper placed on the gear wheel x, and the calipers are equipped with clamping bars and nodes of the feed screw for feeding the cutter into the cutting zone, and set screws and supports for attaching the cutting machine to the pipe. 2. The device according to claim 1, characterized in that it comprises latches placed on the upper half-housing and lower half-housing for fixing the position of the gear halves in the upper half-housing and the lower half-housing in a disassembled state. The device according to claim 1, characterized in that it comprises eyebolts located on the upper half-housing and the lower half-housing for its installation. The device according to claim 1, characterized in that it contains a removable protective casing. The device according to claim 4, characterized in that it comprises a lubricant unit for lubricating the gear wheel and pinion gear located in the protective casing. The device according to claim 5, characterized in that the lubrication unit is made in the form of a box filled with a porous material soaked in oil. The device according to claim 1, characterized in that the caliper is made tracking to compensate for ovality.

Description

The utility model relates to devices for processing pipes and can be used for cutting pipes in the construction and repair of pipelines.

The prior art detachable pipe cutting machines using a hydraulic station as a drive (for example, RF patent No. 2132260). The disadvantage of such solutions is their bulkiness, as well as difficulties in conditions of extremely low temperatures.

It seems more appropriate to use an electric motor as an engine. Based on this principle of work, widely used cutting machines for fireless pipe cutting of the Volzhanka series are implemented (http: //sovitek.m/mrt-cold/voljanka.html).

The machine for flameless cutting of pipes according to RF patent No. 80135 (published on January 27, 2009; IPC B23D 21/06; F16H 1/32) contains a cutting tool and its drive mounted on a trolley that is equipped with a mechanism for moving it around the outer circumference of the pipe. The trolley moving mechanism is kinematically connected to the cutting tool drive and includes a planetary gear comprising a central wheel and two gear rings, one of which is mounted for rotation rotation, and the central wheel and second ring gear are fixedly connected respectively to the drive and driven shafts of the planetary gear, satellites symmetrically located around the central axis of the planetary gear, and a carrier containing for each satellite two identical cheeks in which a rotating axis with a satellite movably mounted on it. A planetary gear contains four satellites.

The technical result of the known solution is to increase the torque that can withstand the planetary gear mechanism for moving the cart in a machine for fireless cutting. However, in the specified machine for flameless pipe cutting, cutting is carried out using a special profile tool that moves along the pipe using special sleeve-roller chains. In some cases, this does not provide sufficient structural rigidity. Their design has such significant disadvantages as a long cutting time and difficulties when cutting pipes with a large thickness in one pass.

The closest analogue of the claimed technical solution is a pipe cutting machine according to the patent of the Russian Federation No. 2028882 (published on 02.20.1995; IPC B23D 21/04). The pipe cutting machine contains a housing, a drive plate located in it, at least three calipers installed in it with toolholders with the ability to rotate, fix and move in the angular direction, lead screws installed in the tool holders, a movable stop. It is also equipped with an additional stop for retracting the tool. The housing is detachable in two parts. The plates are made in the form of two sectors, respectively located in the mentioned parts of the housing. One of the calipers is made in the form of two sectors, a reading mechanism, a guide, a shaft, and one of the caliper sectors is rigidly fixed to the faceplate with the ability to interact with the movable stop by means of an asterisk. The shaft is mounted on the caliper, and the second of the caliper sectors is mounted by means of an axis fixed to the stationary sector with the possibility of rotation around it. The lead screw is installed in this sector and is connected with the guide and kinematically with the shaft of the fixed sector. The tool holder is installed in the moving sector by means of an axis made with a conical lateral surface with the possibility of rotation relative to the specified sector and moving along it along the guide. The reading mechanism is mounted on the tool post. An additional emphasis is mounted on one of the parts of the housing with the possibility of interaction with the calipers by means of sprockets and is connected to the spindles by means of spring-loaded rods mounted in the said sprockets.

A pipe cutting machine is used for cutting pipes and cutting pipe joints for welding in the conditions of their installation, as well as for sampling defects in ring welds. The technical result achieved is to increase productivity and accuracy, as well as expanding technological capabilities. A disadvantage of the known solution is the complexity of the device, and in addition, it does not disclose the drive mechanism for rotating the faceplate on which the calipers are mounted.

The inventive utility model is aimed at simplifying the design of the device for cutting pipes in comparison with the known solutions and allows to reduce the cutting time, to provide a rigid structure of the device to increase the durability and wear resistance of its main components and parts, to make its use more universal.

The problem is solved in that the pipe cutting device comprises an upper half housing and a lower half housing connected by articulated bolts, an electric motor with a pinion gear and a reducer mounted on a frame connected to the upper half housing, a gear wheel consisting of two halves connected together by clamping devices, mounted on support rollers in the upper half-housing and lower half-housing and made with the possibility of engagement with the drive gear, the tipper unit, tool holders installed in the placement calipers mounted on the gear wheel, and the calipers are equipped with clamping bars and feed screw assemblies for supplying the cutter to the cutting zone, and set screws and supports for attaching the pipe cutting device to the pipe.

Clamps can be placed on the upper half-housing and the lower half-housing to fix the position of the gear halves in the upper half-housing and the lower half-housing in the disassembled state. In addition, the upper half-housing and lower half-housing can be equipped with eyebolts for ease of installation of the device for cutting pipes by means of a lifting mechanism.

Preferably, if the device for cutting pipes contains a removable protective casing. A lubrication unit for lubricating the gear and pinion can be placed in it. In this case, the lubrication unit can be made in the form of a box filled with a porous material soaked in oil.

Further, the utility model is explained in more detail with reference to the figures.

Figure 1 shows a front view of a device for cutting pipes.

Figure 2 shows a side view of a device for cutting pipes.

The device comprises a tipper unit (1), a gear wheel (2), an upper half-housing (3) and a lower half-housing (4), calipers (5), a gearbox and an electric motor (6), a pinion gear (7), latches (8).

The upper half-housing (3) and the lower half-housing (4) are interconnected using two hinged bolts (9).

The gear wheel (2) also consists of two halves, held together by clamping devices (10), mounted in support rollers (not shown). Support rollers are placed in the upper floor of the housing (3) and the lower half-housing (4). To reliably fix the position of the halves of the gear wheel (2) in the upper floor of the housing (3) and the lower half-housing (4) in the disassembled state, clamps (8) are used.

Calipers (5) are mounted directly on the gear wheel (2) using bolts. They include tool holders (11), which are designed to store a cutting tool - an insert tool (not shown). The calipers (5) are also equipped with adjustable clamping bars and a feed screw assembly (12), which is used to feed the insert cutter into the cutting zone. As a support (5), a follow-up support can be used to compensate for ovality.

The tipper unit (1) is rigidly fixed on the outer side of the upper floor of the housing (3) and is designed to store the axis of the tipper (13). The tipper axis (13) is used to rotate the sprocket (14) on the feed screw assembly (12). Also, using the tipper unit (1), the position of the cutters relative to the processed pipe is adjusted before starting work.

Using the set screws (15), made in the form of internal hexagons, and supports (18), the pipe cutting device is mounted on the pipe. Interchangeable set screws (15) and supports (18) may be provided for installing the device on pipelines of various diameters from 325 to 530 mm.

The gearbox and electric motor (6) are mounted on the frame (16), which in turn is connected to the upper floor of the casing (3) of the pipe cutting device. The design of the device may include the use of an electric motor (6) with frequency regulation.

On the upper half-housing (3) and lower half-housing (4), eyebolts (17) are provided for mounting the device using lifting mechanisms.

The pipe cutting device may include a removable protective cover (not shown). In this case, for lubricating the gear wheel (2) and the pinion gear (7), a lubrication unit located on the protective casing can be provided. This lubrication unit is a box filled with a porous material that is saturated with oil. The gear wheel (2) is lubricated through the holes in the protective casing by drip.

A device for cutting pipes works as follows. Rotation from the motor shaft (6) is transmitted to a reduction gearbox, for example, a gearbox of the RP 400 brand. From the gearbox, the rotation is transmitted to the gear wheel (2) of the device through the drive gear (7).

Calipers (5) together with tool holders (11) are fixed on the gear wheel (2) and begin to rotate with it. The feed screw assembly (12) on the support (5) includes a flywheel in which several grooves are made, for example 10 grooves, and with each rotation of the gear wheel (2) the flywheel rotates from the rigidly fixed axis of the tipper unit (1) by one division, feeding cutting tool by a predetermined amount, for example 0.1 mm

Since the tipping unit (1) is one, and the supports (5) with cutters are two, it is obvious that the cutting of one of the cutters will happen faster. To ensure the simultaneous cutting of the incisors, the tipping unit (I) is used: the maintenance worker lifts the handle of the tipping unit (1) towards himself before passing the caliper (5) with the cutter, which has already cut into the pipeline. Thus, the feed screw of the feed screw assembly (12) of this caliper (5) remains in place and further feeding of the cutting tool does not occur. After the support (5) passes the tipper block (1), the employee returns the tipper block (1) to its original position. This operation is performed until the second caliper (5) makes the required number of revolutions and the cutter fixed in the tool holder (11) makes a cut.

On the calipers (5), a “hot” replacement of cutters is provided without dismantling the pipe cutting device. To do this, turn off the motor (6) of the device, loosen the mounting bolts, remove the old cutter and insert a new one. It is possible to use high-speed steel cutters of various configurations for any type of chamfer (30 °, 45 °, 60 °). An advantage of the device for cutting pipes of this design is also that the cutting of edges for welding is possible simultaneously with cutting using special cutters, and further processing of the edges is not required.

To reduce play between the gear wheel (2) and the support rollers, an eccentric can be provided on the axis of the support roller block. Using this axis, the clearance is adjusted on all rollers.

Stop and start the device for cutting pipes is carried out from the control panel.

Coolant is supplied to the cutting tool by a hose from the tank.

Before installing the device for cutting pipes, it is necessary to select a set of set screws (15) and supports (18) in accordance with the diameter of the pipeline. Installation begins with the installation of the upper half-shell (3) with the electric motor (6) and the gearbox using lifting devices. For this, eye bolts (17) are provided on the upper half-housing (3). Further, the lower half-shell (4) is brought under the pipe and is combined with the upper half-shell (3) already installed. After that, the hinge bolts (9) are tightened on the upper floor of the housing (3) and the lower half-housing (4) of the device, as well as the clamping devices (10) and on the gear wheel (2).

Further, the pipe cutting device can be rigidly fixed to the pipe using the set screws (15) and supports (18). To do this, slightly tighten the two set screws (15) with the hexagon with the supports (18) located opposite each other, while trying to maintain the centered and perpendicular position of the device relative to the pipe being processed. Then the remaining two set screws (15) are tightened, located at an angle of 90 ° with respect to the first set of set screws (15) with supports (18).

Before inserting inserted cutters into the tool holder (11), it is necessary to determine which cutters should be used for a particular treatment. The pipe cutting apparatus performs cutting in a clockwise direction as viewed in FIG. There are right and left cutting tools for cutting and beveling. Right-side cutters cut and chamfer the edges on the side on which the machine is mounted, left-side cutters on the opposite side.

The proposed utility model provides a simpler design in comparison with the closest analogue, which positively affects the durability and wear resistance of the main components and parts, as well as the cutting tool. In addition, as shown by tests, the inventive device for cutting pipes allows you to increase the cutting speed, which reduces the total time of repair work of pipelines.

Other advantages of the utility model are the ability to quickly change cutters, the ability to simultaneously cut and chamfer (when using special cutters), cost reduction compared to peers, automatic feeding of the cutter into the cutting zone, unpretentiousness in operation (can be used both in the workshop and in the field).

Claims (7)

1. A device for cutting pipes containing the upper half housing and the lower half housing connected by articulated bolts, an electric motor with a pinion gear and a reducer, mounted on a frame connected to the upper half housing, a gear wheel consisting of two halves connected together by clamping devices mounted on supporting rollers in the upper half-housing and lower half-housing and made with the possibility of engagement with the drive gear, the tipper unit, tool holders installed in the caliper placed on the gear wheel x, and the calipers are equipped with clamping bars and nodes of the feed screw for feeding the cutter into the cutting zone, and set screws and supports for attaching the cutting machine to the pipe. 2. The device according to claim 1, characterized in that it contains latches placed on the upper half-housing and lower half-housing for fixing the position of the gear halves in the upper half-housing and the lower half-housing in a disassembled state. 3. The device according to claim 1, characterized in that it contains eyebolts located on the upper half-housing and lower half-housing for its installation. 4. The device according to claim 1, characterized in that it contains a removable protective casing. 5. The device according to claim 4, characterized in that it comprises a lubricant unit for lubricating the gear wheel and pinion gear located in the protective casing. 6. The device according to claim 5, characterized in that the lubrication unit is made in the form of a box filled with a porous material soaked in oil. 7. The device according to claim 1, characterized in that the caliper is made tracking to compensate for ovality.

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