KR101921257B1 - Internal pressure test device for pipes - Google Patents

Abstract

The present invention relates to an internal pressure test device for a pipe and, more specifically, relates to an internal pressure test device for a pipe, which comprises: a pressurization support unit in which both end portions of a pipe are accommodated; a fluid supply unit supplying a fluid to the inside of the pipe to measure internal pressure; and a packing unit coming in contact with an external surface of the pipe to prevent the fluid from leaking. Moreover, the packing unit is not in contact when the pipe is inserted into the pressurization support unit, and after the pipe is inserted into the pressurization support unit, an internal diameter of the packing unit is reduced to be in contact with an external surface of the pipe. Therefore, when the pipe is inserted or drawn out, abrasion of the packing unit is prevented by enabling the pipe to be in contact to improve durability. Even though the internal pressure test device is repeatedly used, watertightness is secured to secure accuracy of a test.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to an apparatus for inspecting the internal pressure of a pipe, and more particularly to an apparatus for inspecting the internal pressure of a pipe, including a pressurizing support unit for accommodating both ends of the pipe, a fluid supply unit for supplying the fluid into the pipe to measure the internal pressure, Wherein the packing unit is not contacted when the pipe is pulled into the pressurizing support unit and the inner diameter of the packing unit is reduced after the pulling is completed so as to be brought into close contact with the outer surface of the pipe, The present invention relates to a pipe internal pressure inspection apparatus which can improve durability by preventing a packing unit from being worn by contact with a pipe at the time of introduction or withdrawal and ensuring watertightness even if used repeatedly to ensure accuracy of inspection.

Pipes are manufactured in various sizes according to their materials and applications, and their production methods are also various.

Particularly, as one of such manufacturing processes, a method is used in which a pipe is obtained by bending a plate material and then connecting and welding opposite ends thereof to each other.

Particularly, in such a case, defective parts of the pipe due to welding failure are generated, and the overlooked weld defect part can cause various safety accidents.

There are visual inspection methods, non-destructive inspection methods, etc., and there is a method of inspecting welds by increasing the pressure by using water inside the pipe.

In this type of method using pressure, the both ends of the pipe are sealed, and then the inside of the pipe is filled with water or fluid to form a high pressure, and it is possible to check whether the pipe is welded or other surfaces are joined. It is widely used because it is possible to inspect the entire pipe as well as the site at one time.

A related related art is disclosed in Korean Patent No. 10-0942263 entitled " A clamp for fixing a pipe and a pipe water pressure tester equipped with the clamp "

The conventional art includes a main frame including a lower frame and a side frame extending from the lower frame; A pipe support coupled to one side of the base frame; a cylinder portion coupled to the other side of the base frame; a rocker arm portion coupled to the cylinder portion and moving up and down; And a support structure which is composed of a cam structure coupled to the pipe support and guiding the upward and downward movement of the arm.

However, the conventional technique has a complicated structure, and when a high water pressure is applied to the inside of the pipe, a minute change occurs at a position where the head portion and the tail portion are initially set.

Therefore, in order to solve such a problem, Patent No. 10-1158401 entitled " Hydraulic Tester for Pipe "

The above-described prior arts have a pair of pressing supports arranged coaxially and spaced apart from each other, in which a center hole penetrating right and left is formed, and a sealing pad is formed in close contact with both ends of a pipe as a test object, A water supply core having a plurality of discharge openings formed therein for discharging water toward the inside of the pipe, both ends of which are fixed by the pressure support portion, and a sealing packing provided in the center hole to prevent leakage of water by being in close contact with the outer surface of the water supply core Technology.

Also, as a conventional technique, there is a public utility model No. 20-2006-0000082 entitled "

The prior art has a structure in which the head portion and the tail portion are separated by a high pressure hose, a low pressure hose, and an air discharge valve, and an air discharge valve and a hydraulic cylinder are installed in the tail portion. The head portion of the present invention is provided at the tip end portion of the pipe and water is injected into the pipe with the low pressure hose of the head portion after the tail portion is provided at the rear end portion of the pipe, , It is suggested to inject water with a high-pressure hose to check whether the pipe is leaking.

However, in the conventional techniques, separate packing is used to fix both ends of the pipe. When the pipe is inserted to fix the end of the pipe, friction between the pipe and the packing occurs due to the packing being in close contact with the pipe So that wear of the packing easily occurs,

Therefore, the water tightness is lowered and it is difficult to accurately check the internal pressure.

In addition, due to such problems, frequent replacement of the packing must be performed, which increases the maintenance cost and delays in the operation due to the replacement.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

Wherein the packing unit includes a pressure support unit, a fluid supply unit, and a packing unit, the pressure is measured by introducing a fluid after fixing both ends of the pipe, and when the pipe is drawn out to the pressure support unit, And to prevent the wear of the packing unit.

In order to achieve the above-mentioned operation, the packing unit is composed of a packing member and a backup ring. The backup ring is composed of a plurality of ring powder and a restoring spring. When the pressurized fluid is supplied, And an inner diameter of the pipe can be enlarged by a restoring spring when supply of the pressurized fluid is stopped.

Another object of the present invention is to provide an apparatus for inspecting the internal pressure of a pipe for preventing the packing member from being deformed by fluid supplied for inspecting the internal pressure, thereby improving watertightness, by providing the backup ring so as to be offset in one direction of the packing member.

In addition, by constituting the first and second protrusions on the outer surface of the packing member, the pressurized fluid can improve the hermeticity by pushing the protrusions and improve the pressing force to push the packing unit in the pipe center direction, The present invention also provides another object of the present invention.

In order to achieve the above object, an apparatus for checking the internal pressure of a pipe according to the present invention comprises:

A pair of pressurizing and supporting units arranged to be coaxially displaced from each other and spaced apart from each other, and having a receiving portion such that both ends of the pipe are in close contact with each other;

A fluid supply unit provided in the pressure supporting unit for supplying fluid for measuring internal pressure of the pipe into the inside of the pipe;

A packing unit provided in the pressure supporting unit and adapted to be brought into close contact with an outer surface of the pipe seated in the receiving part to prevent the supplied fluid from leaking;

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The packing unit

The inner diameter of the packing unit can be reduced by the pressurized fluid supplied toward the outer surface of the packing unit,

The inner diameter of the packing unit is maximized when the end portion of the pipe is pulled out to the receiving portion so that the packing unit and the outer surface of the pipe are not in contact with each other,

And the packing unit is adhered to the outer surface of the pipe as the inner diameter of the packing unit is reduced by supplying the pressurized fluid when the end of the pipe is seated in the receiving part.

As described above, according to the present invention,

A fluid supply unit and a packing unit to supply a fluid for internal pressure measurement into the pipe to measure the internal pressure of the pipe. When the pipe is drawn in or out of the pressure support unit, the packing unit and the pipe are made to be in noncontact , It is possible to prevent the packing unit from being worn by friction between the packing unit and the pipe, thereby improving the durability and extending the service life.

Further, as the service life of the packing unit is extended, the replacement time of the packing unit is increased, so that the work amount and the operation speed are increased and the accuracy of the internal pressure measurement is also improved.

In order to achieve the above-mentioned effects, the packing unit is constituted by a packing member and a backup ring, and the backup ring is provided to be offset to one side of the packing member, It is possible to prevent the clearance, the gap, and the like from being generated, so that the internal pressure can be measured more accurately,

By forming a plurality of projections on the outer surface of the packing member, the pressure due to the pressurized fluid can be more effectively transmitted and the watertightness of the packing member can be improved.

1 is a cross-sectional view of an apparatus for checking the internal pressure of a pipe according to the present invention
2 is a perspective view of a packing unit of an apparatus for checking the internal pressure of a pipe according to the present invention.
3 is a view showing the packing unit of the apparatus for checking the internal pressure of the pipe according to the present invention
4 is a detailed view of the apparatus for checking the internal pressure of the pipe according to the present invention
5 is a circuit diagram of an apparatus for checking the internal pressure of a pipe according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 to 5, the apparatus for checking the internal pressure of a pipe according to the present invention comprises a pressurizing support unit 10 and a fluid supply unit 20 packing unit 30, (10) are arranged so as to be able to accommodate both ends of the pipe (P) as they are spaced apart and coaxially movably arranged.

First, the pressurizing and supporting unit 10 is provided in the housing B, and the housing B serves as a support for fixing the present device to the installation surface, The support units 10 are provided in a pair.

A pipe P is fixed between the pair of pressurizing and supporting units 10 so that the end of the pipe P can be inserted into the housing 15 of the pressurizing support unit 10. [ B may be provided with a supporting member B1 for separating the pipe P to a predetermined height.

The pair of pressurizing and supporting units 10 are coupled to the housing B by rails and are movable in the direction of the pipe P. The pressurizing and supporting unit 10 is described in more detail with reference to FIG. Explain it.

The pressing support unit 10 includes a main body 11 and a ring-shaped holding portion 13 bent in the direction of the pipe P so as to form a receiving portion 15 from the main body 11 In addition,

A fluid inflow hole 23 capable of supplying fluid F1 to the interior of the pipe P is formed in one of the pressure supporting units 10 and air And an exhaust valve 251 for opening and closing the exhaust hole 25 is further provided.

The holding part 13 is formed with a seating part 133 which can be equipped with the packing unit 30 to ensure watertightness between the holding part 13 and the pipe P, And a cover 131 is provided at an end of the holding part 13 to prevent the packing unit 30 of the seating part 133 from being separated from the seating part 133. The covering part 131 is fixed to the holding part 13, (Not shown).

The pressing support unit 10 and the cover ring 131 are made of a hard material such as stainless steel or iron to prevent the shape of the cover 131 from being deformed by the inflow fluid F1. And is in close contact with the ring 33 and serves to support the pushing of the backup ring 33 by the fluid F1, which will be described in more detail below.

2 to 4 are a detailed view showing the packing unit 30 in more detail and an operation of the packing unit 30,

The packing unit 30 will be described in more detail with reference to the drawings.

The packing unit 30 is provided on the pressure supporting unit 10 so as to be closely attached to the outer surface of the pipe P which is seated in the receiving part 15 to prevent the supplied fluid F1 from leaking out.

More precisely, the packing unit 30 is constructed so as not to contact the outer surface of the pipe P when the pipe P is pulled in or pulled out, thereby preventing the wear of the packing unit 30, The inner diameter of the packing unit 30 is reduced and can be brought into close contact with the outer surface of the pipe P. [

To this end, in the present invention, the pressurized fluid F2 for pressing the outer surface of the packing unit 30 is further supplied,

It is preferable that the fluid F1 supplied into the pipe P and measuring the internal pressure and the pressurized fluid F2 pressurizing the outer surface of the packing unit 30 are all made of the same fluid F1, It is also possible to have a fluid F1, and the scope of the right should not be limited.

That is, the packing unit 30 can be reduced in inner diameter by the pressurized fluid F2 supplied toward the outer surface of the packing unit 30,

The inner diameter of the packing unit 30 is maximized so that the packing unit 30 and the outer surface of the pipe P do not contact each other when the end of the pipe P is drawn out to the receiving part 15 ,

When the end of the pipe P is seated in the receiving portion 15, the pressurized fluid F2 is supplied to reduce the inner diameter of the packing unit 30, so that the packing unit 30 ) Can be closely adhered to each other,

The packing unit 30 includes a packing member 31 and a backup ring 33 provided in the packing member 31. The backup ring 33 is composed of a plurality of ring powder bodies 331, And a restoring spring 335 connecting the ring powder bodies 331 to each other.

More specifically, the packing member 31 is fixed to the seating portion 133 and is formed in a ring shape having a hollow portion 36 into which the pipe P can be inserted, And a pressing force is generated in the direction of the center of the packing unit 30 when the pressurized fluid F2 is supplied through the inlet hole 135 provided in the holding unit 13, Can be reduced.

In addition, the packing member 31 is provided with an insertion portion 311 which is inclined in one direction, and the insertion portion 311 is provided with a hard backup ring 33.

The backup ring 33 is made of a hard material and unlike the packing member 31, the inner diameter of the backup ring 33 can not be changed. To solve the problem, the backup ring 33 is provided with spaced- And a restoring spring 335 is provided between the ring powder bodies 331 so that they can be connected to each other.

In order to provide the restoration spring 335, it is self-evident that an insertion hole into which a spring can be inserted is formed in each ring powder 331, and a detailed description thereof will be omitted.

The ring powder 331 can form a single hollow 36. In the figure, six ring powder 331 are shown to form one ring, but this is only an example, Quantities may vary widely and should not be limited in scope.

As shown in the drawing, the ring powder 331 is spaced apart from each other to form a spacing part 333 and is provided in the packing member 31. The inner diameter at this time is b, B is made larger than a, and a non-contact portion 35 is formed between the pipe P and the backup ring 33 (packing unit 30). Therefore, when the pressing support unit 10 moves to the end of the pipe P and accommodates the end portion of the pipe P in the accommodating portion 15, the non-contact portion (not shown) between the packing unit 30 and the pipe P 35 are formed, the packing unit 30 is prevented from being abraded by friction with the outer surface of the pipe P,

Thereafter, the pressurized fluid F2 flows into the outer surface of the packing unit 30 to pressurize the packing unit 30 to reduce the inner diameter thereof. The backup ring 33 (each ring powder 331) A pressing force is generated in the center direction of the backup ring 33 to reduce the inner diameter of the ring powder 331 so that the ring powders 331 are closely contacted with each other.

That is, when the inner diameter of the backup ring 33 is reduced in the inner diameter, c is set to be the same as a, so that the packing unit 30 can be brought into close contact with the outer surface of the pipe P .

If the spacing 333 is too large, the c may be smaller than a. In this case, since the outer surface of the pipe P may be damaged, desirable.

Further, when the pressing force of the pressurized fluid F2 is released (the supply is released), the ring powder 331 is separated from each other by the elastic restoring force of the restoring spring 335, (P) as the inner diameter of the whole of the pipe (30) increases.

As shown in FIG. 4, in another aspect of the present invention, the backup ring 33 is biased in one direction at the packing member 31.

In this case, the one direction refers to a deviation from the packing member 31 in the direction of the covering 131.

As a result, the backup ring 33 is provided on the packing member 31 and is in close contact with the cover ring 131.

To explain this reason in more detail,

When the fluid F1 is introduced by the pump 21 a part of the fluid F1 pushes the packing member 31 at this time the backup ring 33 is located in the middle of the packing member 31 The packing member 31 together with the back-up ring 33 is filled with the packing member 31 made of a soft material. It is difficult to ensure perfect watertightness. However,

The present invention is characterized in that the backup ring 33 is in tight contact with the cover ring 131 and the backup ring 33 located at the rear end in the direction of pressure of the fluid F1 is made of a hard material, 33 are supported by the cover ring 131, the packing member 31 is prevented from being deformed by the pressing force, and water tightness can be ensured.

In another aspect, the packing member 31 further includes a first protrusion 313 and a second protrusion 315 provided on both sides of the first protrusion 313, 315 are each formed obliquely in a direction away from the first protrusion 313 (having a shape further projected by d).

This is to ensure a more complete watertightness,

When the packing member 31 of this structure is inserted into the seating portion 133 of the holding portion 13, the second projection portions 315 are more perfect for the inner wall surface of the seating portion 133 and the covering 131 When the pressurized fluid F2 is introduced through the inlet hole 135, a pressing force by the pressurized fluid F2 is applied to the inside of the second protrusion 315 (toward the first protrusion 313) The pressing force of the second protrusion 315 is improved and the pressing area of the first protrusion 313 becomes wider than when the first protrusion 313 is absent, The inner diameter of the packing unit 30 can be more easily reduced.

FIG. 5 is a circuit diagram of an apparatus for checking the internal pressure of a pipe according to the present invention. More specifically, in the description of a fluid inflow unit, a fluid F1 And a pressurized fluid F2 for pressing the outer surface of the packing unit 30 is composed of the same fluid F1 and is supplied through a single pump 21. [

In using the single pump 21, since the pressure of the fluid F1 for checking the internal pressure and the pressure for pressing the outer surface of the packing member 31 are equal to each other, the pressure is prevented from being tilted to one side And the single pump 21 can be used to simplify the structure, and it is not necessary to constitute different control sections for each, so that the convenience of use can be improved.

Referring to the flow of the fluid F1 with reference to FIG. 5,

First, when a fluid is pumped from a single pump 21, the fluid passes through the distribution section K1. In the distribution section K1, the first line K2 in which the fluid F1 flows into the fluid inflow hole 23, The second line K3 and the third line K4 flowing to the inlet hole 135 are distributed.

The third line K4 supplies fluid to the inlet port 135 to press the packing unit 30. The first line K2 and the second line K3 supply fluid to the inside of the pipe do.

In this case, there are two lines for supplying the fluid inside the pipe,

First, the first line K2 does not have a device for measuring the pressure but serves to fill the fluid inside the pipe. The second line K3 supplies the fluid to the inside of the pipe while applying pressure for testing Line.

That is, if pressure is applied from the beginning to the end through the second line K3 to fill the inside of the pipe, there is a problem that the time is long. Accordingly, the present invention can be applied to the case where after the fluid is supplied to the pipe through the first line K2 to a certain extent, if the fluid is almost filled in the pipe, the first line K2 is closed, It has features that can shorten the test time by applying pressure and filling the fluid.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the details of various modifications, permutations and permutations thereof, , Changes and substitutions are to be construed as falling within the scope of protection of the present invention.

D: Pressure test apparatus P: Pipe
B: Housing B1: Support member
10: pressurizing support unit 11:
13: Holding portion 131: Covering
132: fixing bolt 133: seat part
135: inlet hole 15:
20: fluid supply unit 21: pump
23: Fluid inflow hole 25: Exhaust hole
251: exhaust valve 30: packing unit
31: packing member 311:
313: first protrusion 315: second protrusion
317: insertion part 33: backup ring
331: Ring powder 333:
335: restoring spring 35: non-contact portion
36: Hollow portion

Claims (4)

A pair of pressing and holding units (10) arranged to be spaced apart from each other so as to be movable in a coaxial manner and having accommodating portions (15) for accommodating both ends of the pipe (P);
A fluid supply unit (20) provided in the pressure support unit (10) for supplying fluid for measuring internal pressure of the pipe (P) into the inside of the pipe;
A packing unit (30) provided in the pressure supporting unit (10) and brought into close contact with the outer surface of the pipe placed in the receiving part (15) so as to prevent the supplied fluid from leaking;
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The packing unit (30)
The inner diameter of the packing unit 30 can be changed by the pressurized fluid supplied toward the outer surface of the packing unit 30,
The inner diameter of the packing unit 30 is increased so that the packing unit 30 and the outer surface of the pipe P are not in contact with each other, ,
When the end of the pipe P is seated in the receiving portion 15, the pressurized fluid is supplied to reduce the inner diameter of the packing unit 30, so that the packing unit 30 is brought into close contact with the outer surface of the pipe P. However,
The packing unit (30)
A packing member 31 and a backup ring 33 provided on the packing member 31,

The backup ring (33)
A plurality of ring powder bodies 331 formed with spacing portions 333 so as to be spaced apart from each other and a restoring spring 335 connecting between the ring powder bodies 331,
When the pressurized fluid is supplied to press the outer surface of the packing member 31, the ring powder 331 receives pressure in the direction of the center of the pipe so that the spacing 333 is eliminated, The inner diameter is reduced,
Wherein when the supply of the pressurized fluid is stopped, the ring springs (331) are separated from each other by the restoring spring (335) to form the spacing (333) to increase the inner diameter. The method according to claim 1,
The backup ring (33)
Wherein the packing member (31) is biased in one direction. 3. The method according to claim 1 or 2,
Wherein the packing member is further provided with a first protrusion on an outer surface thereof and a second protrusion on the opposite sides of the first protrusion. The method of claim 3,
Wherein the backup ring (33) is made of a hard material.

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