KR20010091731A - Pipe fold machine - Google Patents

Abstract

PURPOSE: A pipe bending device is provided to minimize the generation of wrinkle portion and convex-concave portion, and to reduce the cost of piping work by eliminating the use of a bending connector. CONSTITUTION: The pipe bending device is comprised of a body(2), and a fastening member, of which one end is coupled with a flexible expansion tube(3) and the other end is coupled with a sealing member(5). The body comprises a handle, an inlet opening(22), a pressure gauge(23), a safety valve(24), which are spaced at regular distance of 90degree around the peripheral of the handle. Also, the pressure gauge, the inlet opening, and the safety valve are communicating each other by a three-way passage provided in the handle. An outlet opening surrounded by a receiving groove is integrally projected from the one side of the handle.

Description

Pipe bending machine {PIPE FOLD MACHINE}

The present invention relates to a pipe bending machine, and more particularly, to form an expansion tube that is expanded and expanded by air pressure, and to bend the pipe while bending the pipe while the tube is inserted into the tube. The present invention relates to a pipe bending machine that can minimize the occurrence of phenomena and can eliminate the use of other bending connectors, thereby reducing the cost of piping work.

In general, during the piping work of the PVC (granular pipe) pipe is required to bend the pipe according to the angle of the bent portion as the bending portion is indispensable,

Since the pipe bending work must consider the wrinkles and irregularities caused by the bending portion when the pipe itself is bent, the conventional bending work is sealed in a state filled with a pipe to bend and then heated to bend the desired portion. The working type of bending by angle was mainly used.

However, the conventional bending work as described above has the trouble of filling sand with a pipe to be bent, and has a problem that it is difficult to suppress irregularities and wrinkles in the bending pipe due to its own particle size.

On the other hand, another form of pipe bending work is to use a bending connector such as elbow, the use of this bending connector to cut the pipe in accordance with the connection portion, which causes the waste of the piping work The problem is that the cost rises and the layer is formed inside the pipe, which acts as a deterrent to the progress of the transported oil.

Therefore, the present invention was devised to solve the inconvenience of bending the above-described conventional pipe,

It is an object of the present invention to form an expansion tube that is expanded and expanded by air pressure, while bending the pipe while the tube is inserted into the tube, thereby minimizing the occurrence of wrinkles and irregularities of the bent portion, and other bending connections. It is possible to eliminate the use of a sieve to provide a pipe bending machine that can be expected to reduce the cost of piping work.

As a specific means of the present invention for achieving the above object;

An inlet, a pressure gauge, and a safety valve that are connected to each other through a through passage therein are formed to be coupled to the outer circumference of the handle. A main body having a groove having a discharge port protruding therefrom, a male thread having a male thread formed to be screwed into the female thread groove, and having a supply hole which is a through hole; It is achieved by having a pipe bending machine comprising an expansion tube that expands and expands in a pipe by receiving air pressure, and a sealing hole coupled to seal the other end of the expansion tube by a band fixture.

1 is an exploded perspective view of a pipe curved machine according to the present invention

Figure 2 is a perspective view of the combination of the pipe curved machine according to the present invention

3 is a cross-sectional view of a pipe curved machine according to the present invention

Figure 4 is a state of use of the pipe curved machine according to the present invention

<Explanation of symbols for major parts of drawing>

1 pipe bending machine 2 body 3 expansion tube

4 coupler 5 seal 21 handle

22: inlet port 23: pressure gauge 24: safety valve

25: outlet 26: receiving groove 41: supply hole

42: male thread 43, 52: band assembly 44, 51: fitting groove

211: through passage 251: female thread groove 431, 521: engaging projection

H: Air inlet hose P: Pipe

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a pipe curved machine according to the present invention, FIG. 2 is a perspective view of a pipe curved machine according to the present invention, FIG. 3 is a cross-sectional view of a pipe curved machine according to the present invention, and FIG. As a state diagram of the use of the pipe bending machine according to the configuration state;

Inlet 22, pressure gauge 23, and safety valve 24 are formed at the outer circumference of the handle 21, and at one side, the main body 2 having the outlet 25 protruding therefrom, a combination 4, and a sealing port. (5) is composed of an expansion tube (3) coupled to one end and the other end.

Here, the main body 2 is coupled to the inlet 22, the pressure gauge 23 and the safety valve 24 by 90 degrees at the outer circumference of the handle 21 taking the rod body as shown in Figure 1, One side of the handle 21 is that the discharge port 25 is wrapped in the receiving groove 26 is formed integrally extending to the handle 21,

The handle 21 is formed therein in three directions through the passage 211 is in communication with the outer circumference as shown in Figure 3, the inlet 22, the pressure gauge 23 and the safety valve 24 is in communication The safety valve 24 coupled as a structure and thus coupled is a means for discharging the excess pressure generated inside the through passage 211 to the outside, and discharges the excess pressure to the outside by an opening / closing action of the membrane supported by the spring. Done.

At this time, in the through passage 211, the end of the through passage 211 to which the inlet 22 is coupled to form a female screw, as shown in Figure 1 inlet 22 through which the pneumatic injection hose (H) is screwed The screw is coupled to, and the pressure gauge 23 and the safety valve 24 is coupled to the through passage 211 is preferably a sealing member (packing or sealing, etc.) to improve the sealing force.

In addition, the outlet 25 extending to one side of the handle 21 is formed to be wrapped by the receiving groove 26 having a stepped structure as shown in Figs.

Such outlet 25 has a rod-shaped body, but the female screw groove 251 is formed in the end portion has a structure in communication with the through passage 211 and the handle 21, the female screw groove 251 The diameter will have a diameter that can be screwed with the coupler (4) to be described later.

At this time, it is preferable to form the stepped jaw with the receiving groove 26 to be formed at least three steps of the jaw so as to correspond to the pipe having a large, small difference in diameter.

On the other hand, the coupler 4 is a through-hole 41 is formed through, as shown in Figure 1, the outer one of the center is formed with a male screw 42 which is screwed into the above-described female thread groove 251, the other center The outer circumference is formed with a fitting groove 44 into which the band assembly 43, which is a coupling medium with the expansion tube 3, described later.

At this time, the fitting groove 44 is " It is a groove having a shape such as ", the band coupling body 43 is formed in a ring shape of the rubber material, the coupling protrusion 431 is engaged with the fitting groove 44 by the inner diameter in order to improve the coupling force is formed. .

In addition, the closure 5 is the fitting groove 51 of the same structure as the above-described coupling sphere 4 is formed in the center of the outer circumference and sealed to the other side of the expansion tube 3 to be described later by the band coupling body 52 As combined, it has a stopper structure without a separate through hole configuration.

In addition, the expansion tube (3) to which the coupler (4) and the seal (5) is coupled is usually a tube having a length that can correspond to a 6-meter pipe is a rubber material having elasticity as its constituent material, Such expansion tube (3) has a diameter equal to at least the diameter of the pipe (P) to be bent at least so that it can expand to a diameter larger than its own diameter when inflow of external air pressure, according to the diameter of the pipe (P) to be bent It is produced by changing the diameter.

Thus, looking at the coupling state of the pipe curved machine (1) according to the present invention having the configuration as described above and the operating state between the respective components;

3 to 4, the first and the other end of the expansion tube (3) as shown in Figure 3 to 4 by the coupling member (43, 52) in the state of fitting the coupling sphere 4 and the sealing opening 5 , This is achieved by engaging the coupling protrusions (431, 521) of each band coupling member (43, 52) to the fitting grooves (44, 51), the male screw 42 of the coupling sphere (4) coupled to the expansion tube (3) in this way Assembly is completed by screwing into the female thread groove 251 of the main body 2 outlet 25.

At this time, the expansion tube (3) coupled to the main body (2) by the screw coupling of the coupler (4) through the outlet 25 as described above is the main body (2) through the supply hole 41 of the coupler (4) It is in communication with the through passage 211.

Therefore, the pipe bending machine 1 is assembled as described above, the expansion tube 3 is inserted into the pipe (P) to be bent, the outlet 25 of the main body 2 is inserted into the pipe (P) inner diameter One end of the pipe (P) to be fitted into the receiving groove (26), and the external air pressure inlet hose (H) is used in the state in which the screw inlet 22,

The external air pressure supplied to the inlet port 22 (the external air pressure is preferably 0.7-1.0 kgf / cm ² ) is expanded through the supply hole 41 of the outlet port 25 and the coupling port 4, which is in communication. 3) is introduced to expand the expansion tube (3),

When the expansion tube 3 expanded by the external air pressure is in close contact with the inner diameter of the pipe P, the portion to be bent is heated to a suitable temperature by a heating tool (torch lamp, etc.), softened, and then bent at a desired angle. do.

In addition, after the bending work is completed, the air pressure injection hose (H) is detached from the inlet port (22) or by pulling the handle connected to the membrane of the safety valve 24 to discharge the working pressure filled with the expansion tube (3) outside By returning the expansion tube to its original state, it is easily separated from the inner diameter of the pipe (P).

Thus, the bent pipe (P) can minimize the occurrence of wrinkles and irregularities of the outer skin portion as the bending operation is performed in the state in which the expansion tube (3) is in close contact with the inner diameter, and thus the pipe (P) itself By bending, it is possible to exclude the use of a separate bending connector to prevent the phenomenon of fluid catching.

Here, the pressure of the external air pressure supplied through the inlet 22 is visually confirmed by the operator through the pressure gauge 23, and when the excess pressure is supplied into the through passage 211 through the safety valve 24 Overfeed will be discharged to the outside.

On the other hand, the pipe bending machine 1 according to the present invention, the bending operation is performed as described above is used by changing the diameter of the expansion tube 3 according to the diameter of the pipe (P) as described above.

As described above, the pipe bending machine according to the present invention minimizes the occurrence of wrinkles and unevenness of the bending part by performing the bending work of the pipe while the expansion tube expanded and expanded by air pressure is inserted into the pipe tube to be bent. The use of other bending connectors can be eliminated, so the cost saving effect of piping work can be expected.

Claims (2)

An inlet, a pressure gauge, and a safety valve that are connected to each other through a through passage therein are formed to be coupled to the outer circumference of the handle. A main body having a groove having a discharge port protruding therefrom, a male thread having a male thread formed to be screwed into the female thread groove, and having a supply hole which is a through hole; Pipe expansion machine characterized in that it consists of an expansion tube which expands and expands in the pipe by receiving air pressure, and a sealing hole coupled to seal the other end of the expansion tube by a band fixing tool. The pipe bending machine according to claim 1, wherein the pipe receiving groove formed at the outer circumference of the outlet is formed with a multi-stage jaw having a different diameter so as to correspond to the diameter of the pipe to be bent.