RU225699U1 - DEVICE FOR CUTTING PLASTIC PIPE - Google Patents

Abstract

The utility model relates to hand-held devices for cutting plastic pipes used in plumbing systems. A device for cutting plastic pipes contains two parts in the form of a body and a cover that can be rotated relative to each other. The body has a groove at the base of which a cutting tool is installed, pressed to the base of the groove by means of a latch. There is a recess in the body, the shape of which corresponds to the shape of the outer and inner surfaces of the pipe. A niche is formed in the lower part of the body, connected to a recess through a hole. The niche contains a trimmer protruding into the recess through the specified hole. The technical result of the utility model is the creation of a device for cutting plastic pipes with the ability to chamfer it. 6 ill.

Description

The utility model relates to hand-held devices for cutting plastic pipes used in plumbing systems.

To connect plastic sewer pipes to each other in engineering plumbing, pipes with a socket are used. To facilitate insertion into the socket, the edge of the cut pipe must contain a chamfer on the outer surface of the pipe.

Currently, a professional plumber who installs plastic pipes has to use a wide variety of tools. A tool carried from object to object takes up the dimensions of the box and increases its weight. Therefore, it is relevant to develop and implement a universal tool that will combine some of the functions of tools (for example, a pipe cutter and a chamfer) and facilitate the work of a plumber.

A separate device for chamfering is known - utility model of the People's Republic of China No. 215882285, B29C37/00, publ. 02/22/2022, consisting of a tower-shaped stepped body and a cutting blade screwed to it with screws. During operation, a pipe of a given diameter is inserted into the device and rotated. Chamfering a pipe occurs using a blade located at a certain angle. The disadvantage of this device is that it only performs a chamfering function and to cut a plastic pipe it requires an additional device in the form of a pipe cutter.

A device for cutting pipes (pipe cutter) is known - German application 102022100784, B26D 3/16, B23D 21/08 publ. 01/14/2022, which allows you to fix the pipe by clamping it between the retractable cutting element and the rollers, hinged in pairs on the body. The cutting element of the device allows you to cut the pipe immediately with the formation of a chamfer. The disadvantage of the device is that the width of the resulting chamfer depends on the thickness of the pipe wall, so, with a pipe wall thickness of less than 1.8 mm, the width of the chamfer is 1 mm, which differs from the factory chamfer from the pipe manufacturer and may not make it easier to insert a cut pipe with a chamfer into the bell The disadvantage is the large dimensions of the device.

The closest technical solution (prototype) is a device for cutting pipes (pipe cutter) - German application 102021105343, B26B 27/00, publ. 09.19.2022, consisting of two halves in the form of half rings, fastened together, one of which has a groove into which a clamp with a cutting blade is inserted. Pipe cutting is achieved by clamping the pipe between half rings and then rotating the pipe in the device. This device has smaller dimensions compared to the previous device and a simpler operating principle.

The main disadvantage of this device is that chamfering is not provided in this device and it is necessary to use an additional device for chamfering - a chamfer.

During the use of the device, the edge of the cut pipe may turn out to be uneven and with burrs, which interferes with subsequent chamfering or the chamfer ends up being uneven. Cutting burrs and straightening edges is inconvenient, since the cutting blade has a cutting edge on only one side. You have to remove the pipe, turn the device over and make the cut in the opposite direction, i.e. carry out additional manipulations with the device.

The technical result is the creation of a device for cutting plastic pipes with the ability to chamfer it.

The specified technical result is achieved by the fact that in a device for cutting plastic pipes containing two parts in the form of a body and a cover that can be connected with the possibility of rotation relative to each other, the body has a groove at the base of which a cutting tool is installed, pressed to the base of the groove by means of a latch, a recess is made in the body, the shape of which corresponds to the shape of the outer and inner surfaces of the pipe, while in the lower part of the body a niche is formed, connected to the recess through the hole and containing a trimmer protruding into the recess through the specified hole. The cutting tool is made in the form of a double-edged blade. The base of the recess contains pipe recess limiters.

The essence of the technical solution is illustrated by drawings.

Fig. 1 - a device for cutting a plastic pipe in an isometric view.

Fig. 2 - the claimed device in a partially disassembled isometric view.

Fig. 3 - the claimed device, right view.

Fig. 4 - the inventive device, bottom view in partially disassembled form.

Fig. 5 - the inventive device, left view during the pipe cutting process.

Fig. 6 - the inventive device, right view during the process of chamfering a pipe.

As shown in FIG. 1, the device contains a housing 1 connected to a cover 2 using a fastening element 3 (for example, a screw, a pin, etc.).

On the left side of the housing 1 (Fig. 2) there is a groove 4, into the base of which a cutting tool 5 is inserted (for example, a double-edged cutting blade 5). The latch 6 presses the blade 5 to the base of the groove 4 (for example, using fasteners 7 - screws, etc.), which ensures reliable fixation of the blade 5 in the body 1.

As can be seen from Fig. 3 in the right side part of the housing 1 there is a protrusion 8 and a recess 9. At the base of the recess 9 there are limiters 10 for deepening the pipe in the inventive device.

The shape of the recess 9 in the body 1 is formed by the convex and concave surfaces 11 and 12 (respectively). In this case, the convex surface 11 repeats the inner surface of the pipe, and the concave surface 12 repeats the outer surface of the pipe.

In fig. 4, in the lower part of the housing 1 there is a niche 13, into which a trimmer 14 is placed, pressed by a holder 15 using fasteners 16 (for example, a screw, etc.). The niche 13 has a through hole 17 into the recess 9. The trimmer 14 with its sharp part protrudes through the hole 17 into the recess 9.

To improve ergonomics and better position of the tool in the hand, the shape of the outer surface of the cover 2 follows the contours of the fingers. On the outer surface of the cover 2 and body 1 there are protrusions 18 and 19 (respectively), increasing the grip of the hand with the inventive device.

In fig. 5 shows a pipe 20, which is placed in the inventive device during the pipe cutting process, clamped by the cover 2 and the body 1.

In fig. 6 shows a pipe 20, which is placed in the inventive device during the process of chamfering the pipe. Pipe 20 is placed in recess 9 in housing 1 and pressed with lid 2.

The device for cutting plastic pipes works as follows. A pipe 20 of a given diameter (from 32 mm to 50 mm) is placed in the open device in the hand between the body 1 and the cover 2. In this case, the outer wall of the pipe 20 is in contact with the cutting blade 5 and the surface of the cover 2. Next, the pipe 20 is rotated in the device, and on the outer surface of the pipe 20, a shallow guide groove is formed using blade 5. As soon as the end of the furrow coincides with its beginning, i.e. There will be a full rotation of the pipe 20 in the device, the compression force of the tool by hand is increased and the blade 5 is completely buried in the pipe 20. Continuing to rotate the pipe 20 in the device, the blade 5 is moved along the guide groove and the pipe 20 is cut.

Next, the device is opened, the cut pipe 20 is removed and inserted into the recess 9 until it stops with its base (see Fig. 6). Next, the pipe 20 in the device is fixed, pressing with the lid 2. The pipe 20 is rotated in the device, while the fixed end trimmer 14 with its sharp part protruding through the hole 17 into the recess 9, cuts into the cavity of the pipe 20. The protrusion 8, in contact with the inner surface of the pipe 20, provides stabilization of the pipe 20 during its rotation in the recess 9. When the pipe 20 is rotated a full turn, a chamfer is removed from the pipe 20 and the cut part is removed through the hole 17 into the niche 13. The width of the resulting chamfer is always constant, since the end trimmer 14 is in a stationary state, and the chamfer is removed immediately from the cut edge and the outer surface of the pipe.

The advantages of the proposed technical solution in relation to the prototype are:

1. Possibility of cutting a pipe with subsequent chamfering from the cut pipe;

2. The use of a double-edged blade allows you to remove burrs when turning the pipe in the device in the opposite direction;

3. The width of the resulting chamfer is the same and does not depend on the wall thickness.

Practice has shown the functionality of this device design for cutting plastic sewer pipes. The declared result was achieved: a device was created for cutting plastic pipes with the ability to chamfer it.

Claims (3)

1. A device for cutting plastic pipes, containing two parts in the form of a body and a cover that are connected and can be rotated relative to each other, wherein the body has a groove in the base of which a cutting tool is installed, pressed to the base of the groove by means of a latch, characterized in that in the body a recess is made, the shape of which corresponds to the shape of the outer and inner surfaces of the pipe, while in the lower part of the body a niche is formed, connected to the recess through the hole and containing a trimmer protruding into the recess through the specified hole. 2. The device according to claim 1, characterized in that the cutting tool is made in the form of a double-edged blade. 3. The device according to claim 1, characterized in that the base of the recess is made with pipe recess limiters.