KR100836593B1 - The water pressure cap for pressure testing a pipe - Google Patents

Abstract

A water pressure cap for a pressure test of a pipe is provided to reduce defect rate during a pressure test by increasing airtightness with less joint parts. A water pressure cap for a pressure test of a pipe includes a holder(30), a cap(20), and a sealing member(40), and a fastening compressor(50). The holder includes a body(31), and a rib(36). The body has a coupling hole(39) in the center and a fastening part(33) on the exterior. The rib is elongated from the body, receives a connection pipe(11) inside, and has male screw thread(35) on the exterior. The cap includes a hole(21) formed in the center as a way the pipe passes, a large hole(22) elongated from the hole, and an angular fastening part(24) formed on the top. The sealing member is interposed between a flange(51) and the connection pipe for keeping airtight. The fastening compressor passes through the coupling hole and includes the flange formed inside the holder.

Description

The water pressure cap for pressure testing a pipe}

The present invention relates to a hydraulic cap for confirming airtightness after installation of various pipes, more specifically, the fluid (air, gas or liquid) injected through the pressure measurement after injecting air, gas or liquid, etc. In the pressure test of pipes to check for leaks, the hydraulic cap installed in the connecting pipe at the end of the pipe keeps the inside of the pipe closed, and can be easily and conveniently installed and removed as compared to the conventional screw method. A hydraulic cap for pressure test of pipes that can save time and cost.

In general, when building or civil works such as apartments, buildings, houses, and tunnels, various pipes are provided to supply water, lubrication, heating water, fire extinguishing water, and the like. Install gradually according to the box.

If a crack such as a crack occurs during the manufacturing or installation process of the pipe, the installed pipe should be removed and reconstructed. If the pipe is already buried in the floor or wall, it will be difficult to find the leaking part of the pipe. This is undesirable, as tearing down and rebuilding the built floor or wall is not only very inefficient, but also shortens the lifespan of the building.

Therefore, recently, after constructing the building, the pipe work is carried out, and then a pressure leak test is performed to check whether the constructed pipe is leaked. After this test, the pipe is buried or fixed by concrete pouring.

In order to test the pressure leakage of pipes installed on the floor or wall of such a building, a pressure gauge is installed at one end of the pipe, and air or water is communicated at a constant pressure at the other end to allow pressure inside the pipe to be instructed by the pressure gauge. It is to closely examine whether there is a drop or leakage, and at this time, one end of the pipe is sealed by installing a hydraulic cap.

If the pressure decreases, a crack in the pipe wall may be suspected, but the pressure gradually decreases even if the hydraulic cap installed at the pipe end and the air tightness of the pipe decrease. This may cause a waste of re-installing the pipe as a mistake.

Therefore, in the installation of the hydraulic cap, in addition to the convenience of mounting and dismounting, it must be ensured the stability of the air tightness with the simple structure.

As a related art for a hydraulic cap, Korean Registered Utility Model Publication No. 20-0297181 has a plurality of fixing bolts 2 installed radially on an outer circumferential surface thereof to be fitted and fixed to the tip of a standing pipe 1, and a screw portion is provided on an inner circumferential surface of an upper end portion. The connector 20 in which the fastener 10 having the 12 formed therein and a threaded portion 22 engaged with the threaded portion 12 are formed on the outer circumferential surface of the lower end portion, and a threaded portion 24 on which the pressure gauge 3 is mounted at the upper end portion. And it is proposed a prefabricated hydraulic cap for pressure test of the building riser consisting of an annular packing (30) interposed between the fastener 10 and the threaded portion (12) (22) to be engaged with the connector 20 to maintain the airtight.

As another conventional technology, Korean Registered Utility Model Publication No. 20-0301192, in the structure of the prior art, is prefabricated hydraulic pressure for pressure test of building standing pipes in which an air discharge valve 40 is connected to one side of the connector 20. I suggest a cap.

However, in order to fix the hydraulic cap according to the prior art to the pipe 1, a plurality of fixing bolts 2 must be fastened one by one to a plurality of screw holes radially formed on the outer circumferential surface of the fixture 10. It takes time, and it is difficult to tighten the plurality of fixing bolts 2 at a uniform pressure, which is difficult for the skilled person, and thus, there is a problem in that workability is lowered.

Moreover, when the plurality of fastening bolts 2 are not uniformly tightened, the fastener 10 and the pipe 1 are easily separated from each other and separated from each other under a high pressure atmosphere formed in the pipe at the time of pressure measurement. There is a problem that leakage occurs because the contact part of (1) is not airtight.

Accordingly, the present invention has been made in order to solve the above problems, the present invention comprises a screw structure of the hydraulic cap that is mounted and detached to the connection pipe of the pipe end, while minimizing the number of parts and simplify the structure The purpose is to provide a pressure cap for pressure test of pipes that can improve workability so that work can be done more conveniently and quickly when installing and removing pipes.

In addition, the present invention reduces the manufacturing cost by reducing the manufacturing cost due to the simplification of the structure, reducing the construction cost by reducing the air, and further leakage by greatly improving the airtightness of the contact portion of each part, including the connection of each part It is another object to provide a hydraulic cap for pressure testing pipes which can minimize the incidence rate.

The preferred means of the present invention for solving the above problems, the one end is provided with a first expansion pipe portion 12 in contact with the end of the pipe 10, the other end is provided with a second expansion pipe portion 13 for crimping ( 11) a hydraulic cap fixed to an outer surface of the pipe 10 to measure airtightness in the pipe 10, the body 31 having a fastening hole 39 formed at a center thereof and a tightening part 33 formed at an outer circumferential surface thereof; A holder 30 consisting of a rib 36 extending in an annular shape from one end of the body 31 to receive a connecting pipe 11 on the inner side and a male screw 35 formed on an outer surface thereof, and fastening with the male screw 35 on an inner circumferential surface thereof. The inner thread portion 23 and the inner diameter portion 21 through which the pipe 10 penetrates are drilled, and the enlarged diameter portion 22 is formed in the inner diameter portion 21 to be pressed against the first expansion tube portion 12. In addition, the cap 20 having a square fastening portion 24 on the outside, and screwed through the fastening hole 39, a flange 51 is formed inside the holder 30, the fastening portion 53 on the outside Is formed and is interposed at the end of the tightening pressure member 50 and the flange 51 and the connection pipe 11 provided with a through hole 32 and a connecting means 34 communicating with the through hole 32 at the center thereof. It characterized in that the sealing member 40 to maintain the airtight, characterized in that the flange 51 by rotating the tightening pressure member 50 to seal the sealing member 40. The.

Another preferred embodiment is fixed to the outer surface of the connecting pipe 11 having a first expansion pipe portion 12 in contact with the end of the pipe 10 at one end and a second expansion pipe portion 13 for crimping at the other end thereof. In the hydraulic cap for measuring the airtightness of the inside of the pipe (10), the through hole 32 is provided therein, the male thread (35) formed on the outer circumferential surface; An annular rib 36 accommodating the connector pipe 11 extends on one end of the body 31, and a connecting means communicating with the diaphragm tightening part 33 and the through hole 32 at the other end thereof ( 34 is provided with a holder 30, the inner threaded surface 23 and the inner threaded portion 21 through which the pipe 10 is fastened to the inner threaded surface 35, and the inner diameter portion 21 A press portion 25 protruding in the direction of the female screw 23 is provided, and a cap 20 having a square fastening portion 24 on an outer side thereof, and the connecting pipe 11 inside the annular rib 36. Sealing member 40 and the pressing portion 25 to be in contact with the end of the press and the pressing portion 25 is in contact with the ring-shaped stopper 60 in contact with the second expansion portion 13 is characterized in that the cap ( 20 is rotated so that the pressing portion 25 presses the stopper 60 so that the connecting pipe 11 is hermetically sealed with the sealing member 40.

According to the hydraulic pressure cap for pressure test of the pipe according to the present invention, since the structure of the hydraulic cap is simple and the mounting and dismounting work is excellent, it is faster and more convenient than the prior art when mounting and detaching the hydraulic cap to the pipe end. As it can work, it is possible to shorten the air as well as to significantly reduce the costs (reduced cost and labor costs and various process costs associated with shortening the product).

In addition, as the number of parts decreases, each connection part that needs to maintain airtightness is reduced, which in turn improves airtightness, significantly reducing the defect rate according to the pressure test, and enables more accurate and accurate pressure measurement. It has a very beneficial effect such as greatly improving workability, workability and reliability in which the test can be performed.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the specific structure and operation of the present invention, through which those skilled in the art will be able to easily implement the present invention, but the following drawings And the description are not intended to limit the invention.

1 is an exploded structural diagram of a hydraulic cap according to a first embodiment of the present invention, Figure 2 is an assembled cross-sectional view of the hydraulic cap according to the first embodiment of the present invention.

1 and 2, at the end of the pipe 10, a connection pipe 11 for interconnecting another pipe (not shown) is fixed, and the connection pipe 11 is at one end of the pipe 10. The first expanding portion 12 is provided in contact with the other end is provided with a second expanding portion 13 for crimping.

The first expansion pipe 12 is a diameter is expanded so that the other pipe of the same diameter as the pipe 10 can be inserted into the connection pipe 11, the second expansion pipe 13 is compressed to maintain the airtight In other words, when another pipe is inserted into the connection pipe 11, the second expansion pipe part may be disposed between the inside of the second expansion pipe 13 and the outer surface of the other pipe to be inserted through a rubber ring or a metal ring. When the 13) is pressed by a press device, the rubber ring or the metal ring is pressed at the same time, so that the inner surface of the connecting pipe 11 and the outer surface of the other pipe inserted into the connecting pipe 11 are hermetically sealed.

The hydraulic cap of the present invention is fixed to the outer surface of the connecting pipe 11 in a state in which the second expansion pipe 13 is not crimped, that is, the pipes are not interconnected to measure the airtightness inside the pipe 10. To be used to, largely divided into the holder 30 and the cap 20 for fixing the holder 30, according to the first embodiment of the present invention, the holder 30 is tightening pressure member 50 It further includes.

First, the holder 30 is formed in the inner center of the body 31, the fastening pressure member 50 to be described later through the screw fastening hole 39 is formed, the outer peripheral surface is formed with a square fastening portion 33.

In addition, one end of the body 31 has ribs 36 integrally formed in an annular shape at its periphery, and an external thread 35 is formed on the outer circumferential surface of the ribs 36, and a pipe 10 is formed inside the ribs 36. Connector 11 is received.

Preferably, a protrusion 37 protruding inwardly may be formed at an end of the rib 36, and the protrusion 37 is caught by the jaw of the second expansion part 13 of the connector 11. Temper 30 serves as a temporary fixing when fitted to the outer surface of the connector 11, which will be embodied in the following description of the operation.

The fastening pressure member 50 screwed to the fastening hole 39 is configured such that the flange 51 is positioned inside the holder 30, that is, inside the rib 36, and outside the holder 30, that is, the A square fastening portion 53 is formed at an opposite end of the flange 51, and the center of the flange 51 is configured to inject air or water into the pipe 10 or to measure the pressure of the injected air or water. Is provided with a through hole 52, one side of the through hole 52 is provided with a connecting means 54 for fastening an injection tube for injecting water or air or a gauge for pressure measurement.

Here, the holders 30 and each of the tightening portions 33 and 53 of the tightening pressure member 50 are formed in a square shape, such as a bolt head, so as to be rotated by a tool such as a hexagonal shape, a hexagonal shape or a triangular shape, a pentagonal shape. It means that it is formed like an octagon.

On the other hand, the cap 20 is provided with a female screw 23 is fastened corresponding to the male screw 35 on the inner circumferential surface, the inner diameter portion 21 is provided so that the pipe 10 penetrates through the end of the female screw 23. In this case, as the first embodiment of the present invention, the inner diameter portion 21 is formed with an enlarged diameter portion 22 which is supported in contact with the first expanding portion 12 of the connecting pipe 11.

Similarly, the outer side of the cap 20 is formed with a square fastener 24, where the meaning of the square is the same as the description of the fastener 33.

The hydraulic cap according to the present invention further includes a sealing member 40 inserted into the annular rib 36 and interposed between the end of the connecting pipe 11 and the flange 51, which will be described later. It demonstrates in detail through description.

3 is a plan view of a sealing member according to a first embodiment of the present invention, Figure 3 is a cross-sectional view of a modified holder (holder) according to the first embodiment of the present invention, as shown in the outer view of FIG. 40 may be in the form of a donut having a relatively small inner diameter, or may be in the form of a ring that can be inserted into the top of the flange 51 as shown in the right figure of FIG. 3, and the shape thereof is not limited.

In addition, as shown in FIG. 4, the flange 51 and the connection pipe 11 of the tightening and pressing member 50 are inserted into or detached from the rib 36 so as to have flexibility in the rib 36. One slit 38 may be formed.

The slits 38 may be installed at two or four opposing positions, or may be formed at a plurality of positions radially, and may be appropriately designed in consideration of the material and characteristics of the holder 30.

With reference to Figures 2 and 4 will be described the operation of the hydraulic cap according to the first embodiment of the present invention, from which the configuration of the present invention will be further embodied.

As shown in the drawing, a ring-shaped sealing member 40 made of an elastic material such as rubber or silicon is seated on the flange 51 in a state where the fastening pressure member 50 is fastened to the fastening hole 39, and then The connecting pipe 11 formed at the end of the 10 is sandwiched between the ribs 36 of the holder 30. In this case, when the protrusions 37 are formed on the ribs 36, the protrusions 37 are formed in the second expansion tube ( 13) is fastened in a state that does not leave at random, that is to say fixed temporarily.

Of course, under the condition that the holder 30 is temporarily fixed, the outer diameter of the second expansion portion 13 must be larger than the inner diameter of the protrusion 37, and the slit 38 formed in the rib 36 is formed of the protrusion 37. The holder 30 can be easily fastened or detached from the connector 11 because the inner diameter is flexible so that the size can be changed.

Next, in the process of fastening the cap 20 installed on the outer surface of the pipe 10 to the holder 30, the female screw 23 and the male screw 35 formed on the cap 20 and the holder 30, respectively, The enlarged diameter portion 22 of the inner circumferential surface of the cap 20 and the first expanded portion 12 of the connecting pipe 11 come into contact with each other.

Thereafter, when the tightening portion 53 of the tightening pressure member 50 is rotated, the flange 51 moves the sealing member 40 as the tightening pressure member 50 rises through the fastening hole 39 of the holder 30. In this case, the reaction force is supported by the expansion part 22 and the first expansion part 11 so that the sealing member 40 is compressed by the flange 51 so that the flange 51 and the connection pipe ( 11) The airtight of the end is maintained.

In this series of working processes, the female screw 23 and the male screw 35 may be inclined as shown in order to further facilitate the fastening and detaching of the cap 20 and the holder 30.

When the female screw 23 forms a taper (inclined), when the female screw 23 is engaged with the male screw 35 of the holder 30, the force of the upper end of the rib 36 is gradually collected inward by the inclined surface Since the slit 38 is formed in the rib 36, the upper end of the rib 26 may be collected inward, and in this case, the protrusion 37 of the rib 36 may have a second expansion of the connecting pipe. Tighten the tube 13 can hold tight.

5 is an exploded structural view of a hydraulic cap according to a second embodiment of the present invention, Figure 6 is an assembled cross-sectional view of the hydraulic cap according to a second embodiment of the present invention, Figure 7 is a second embodiment of the present invention. As the top view of the stopper, the hydraulic cap according to the second embodiment of the present invention is composed of the same components in substantial parts as the hydraulic cap of the first embodiment described above, and therefore the same components are denoted by the same reference numerals.

5 and 6, the holder 30 is in communication with the outside to inject air or water into the pipe 10 into the body 31 or to measure the pressure of the injected air or water. A through hole 32 is provided, and one side of the through hole 32 is provided with a connecting means 34 for fastening an injection tube for injecting water or air or a gauge for pressure measurement.

One side end of the body 31 is integrally provided with a fastening portion 33 of a square, as shown, the connecting means 34 may be formed inside the fastening portion 33.

An outer end of one side of the body 31 has an annular rib 36 is formed to extend to accommodate the connecting pipe 11, the outer surface of the body 31 and the outer surface of the rib 36, respectively A male screw 35 is formed to be engaged with the cap 20.

On the other hand, the cap 20 according to the second embodiment of the present invention is provided with a female screw 23 is fastened to the inner peripheral surface corresponding to the male screw 35, the end of the female screw 23 is the pipe 10 The inner diameter portion 21 is drilled to penetrate, and the annular pressing portion 25 extends from the inner diameter portion 21 toward the female screw 23.

The outer side of the cap 20 is formed with a square fastener 24, where the meaning of the square is the same as described in the first embodiment described above.

The second embodiment of the present invention also includes a sealing member 40 inserted into the annular rib 36 and in contact with the end of the connecting pipe 11, in addition to the first of the connecting pipe 11 It further includes a ring-shaped stopper 60 having an inner diameter larger than the outer diameter of the connecting pipe 11 so as to be seated on the double expansion portion 13 and having an outer diameter smaller than the inner diameter of the rib 36.

The stopper 60 is not limited to a ring shape, and as shown in FIG. 7, one side of the stopper 60 may be formed in a 'U' shape so as to be directly inserted into and detached from the side surface of the connecting pipe 11. In addition, the inner diameter of the stopper 60 may be variously changed according to the size of the pipe 10 or the connecting pipe 11 to large, medium, small, or standard sizes, and may be applied to the present invention.

Although not shown, the female screw 23 and the male screw 35 of the second embodiment of the present invention may also be inclined for ease of fastening and detaching.

5 and 6 will be described the operation of the hydraulic cap according to a second embodiment of the present invention.

As shown in the drawing, a ring-shaped sealing member 40 made of an elastic material such as rubber or silicone is seated on the bottom between the ribs 36 of the holder 30, and then a connection tube formed at the end of the pipe 10 ( 11) The outer surface is sandwiched between the ribs 36 of the holder 30, and then the stopper 60 is seated on the second expansion part 13.

In this state, the cap 20 is fastened to the holder 30, and the cap 20 on the drawing is in the process of fastening the female screw 23 and the male screw 35 formed on the cap 20 and the holder 30, respectively. In this downward direction, the pressing unit 25 is in contact with the stopper 60 to press the connecting pipe 11. Therefore, as the cap 20 and the holder 30 are fastened, the ends of the connection pipe 11 gradually adhere to the sealing member 40, thereby maintaining airtightness.

Although the above description has been described with reference to the accompanying drawings, those skilled in the art may make various modifications or changes with reference to the above description, and such changes are the same as or equivalent to the technical spirit of the present invention and within the claims of the present invention. It must be understood.

1 is an exploded structure diagram of a hydraulic cap according to a first embodiment of the present invention.

2 is an assembled cross-sectional view of the hydraulic cap according to the first embodiment of the present invention.

3 is a plan view of a sealing member according to a first embodiment of the present invention.

4 is a cross-sectional view of a modified holder according to the first embodiment of the present invention.

5 is an exploded structure diagram of a hydraulic cap according to a second embodiment of the present invention.

6 is an assembled cross-sectional view of a hydraulic cap according to a second embodiment of the present invention.

7 is a plan view of a stopper according to a second embodiment of the present invention;

<Description of Symbols for Main Parts of Drawings>

10 piping 11: connector

12: first expansion unit 13: second expansion unit

20: cap 21: inner diameter

22: diameter part 23: female thread

24: tightening part 25: pressurizing part

30: holder 31: body

32, 52: through hole 33, 53: tightening part

34, 54: connecting means 35: male thread

36: rib 37: projection

38: slit 39: fastening hole

40: sealing member 50: tightening pressure member

51: flange 60: stopper

Claims (6)

The first expansion pipe 12 is provided at one end and in contact with the end of the connection pipe 10, and the other end is fixed to the outer surface of the connection pipe 11 provided with the second expansion pipe 13 at the other end to ensure the airtightness inside the pipe 10. In the hydraulic cap for measuring, A body 31 having a fastening hole 39 formed at a center thereof and a tightening part 33 formed at an outer circumferential surface thereof; A holder 30 formed of a rib 36 extending in an annular shape from one end of the body 31 to receive a connection pipe 11 on the inside and a male screw 35 formed on an outer surface thereof; A female screw 23 coupled to the male screw 35 and an inner diameter 21 through which the pipe 10 penetrates are formed on the inner circumferential surface thereof, and the inner diameter 21 is pressed against the first expansion pipe 12. The enlarged diameter portion 22 is formed, the cap 20 having a square fastening portion 24 on the outside, Screwed through the fastening hole (39), the flange (51) is formed in the holder 30, the fastening portion 53 is formed on the outside and the through hole 52 and the through hole 52 in communication with the center Tightening pressing member 50 is provided with a connecting means 54 and A pressure cap for pressure test of a pipe, characterized in that the sealing member 40 is interposed between the flange 51 and the end of the connecting pipe 11 to maintain the airtightness. The method of claim 1, A pressure cap for pressure test of a pipe, characterized in that the protrusion (37) protruding inward to the end of the rib 36 is fastened to the second expansion pipe (13). The method of claim 2, At least one slit 38 is formed so that the rib 36 is flexible, the pressure cap for the pressure test of the pipe. delete delete The method according to any one of claims 1 to 3, Hydraulic cap for pressure test of the pipe, characterized in that the female screw 23 and the male screw 35 are inclined respectively.

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