KR101728954B1 - hydraulic pressure detector for low pressure pipe - Google Patents

hydraulic pressure detector for low pressure pipe Download PDF

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Publication number
KR101728954B1
KR101728954B1 KR1020150099207A KR20150099207A KR101728954B1 KR 101728954 B1 KR101728954 B1 KR 101728954B1 KR 1020150099207 A KR1020150099207 A KR 1020150099207A KR 20150099207 A KR20150099207 A KR 20150099207A KR 101728954 B1 KR101728954 B1 KR 101728954B1
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KR
South Korea
Prior art keywords
pipe
pressure
tightening
water
pressure gauge
Prior art date
Application number
KR1020150099207A
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Korean (ko)
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KR20170008017A (en
Inventor
김상열
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(주) 영남메탈
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Priority to KR1020150099207A priority Critical patent/KR101728954B1/en
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Publication of KR101728954B1 publication Critical patent/KR101728954B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/16—Dials; Mounting of dials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/022—Test plugs for closing off the end of a pipe

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pressure check apparatus for checking the number density of a low-pressure pipe, which is more firmly fixed to an end of a pipe and is capable of preventing a pressure gauge from being separated by a water pressure or a pressure supplied to the inside of the pipe, To a water pressure check device for checking the water density of a low-pressure pipe, which can be manufactured easily and has a simpler structure than a high-pressure pipe, and can reduce manufacturing costs by simplifying the manufacturing process and reducing the materials required for manufacturing.

Description

[0001] The present invention relates to a hydraulic pressure detector for low-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a water pressure checking apparatus for checking the water density of a low-pressure pipe, and more particularly, The present invention relates to a hydraulic pressure checking device for checking the water density of a hydraulic pump.

Particularly, it is possible to reduce the manufacturing cost by simplifying the construction and simplifying the manufacturing process, simplifying the manufacturing process, and reducing the manufacturing cost, compared to the high-pressure piping, ≪ / RTI >

There is a variety of means for transporting oil, water, or air (hereinafter referred to as "fluid"). However, there is a need for a simple structure, low maintenance cost, and a long- One way piping is used.

The piping requires airtightness or watertightness (hereinafter referred to as "watertightness"), and checks the water density to check whether the water density can be maintained to a sufficient level when the construction is completed.

The method of measuring or checking the water density is usually classified into atmospheric pressure check, low pressure check and high pressure check. Atmospheric pressure check and low pressure check can be performed by simply filling the fluid inside the pipe or structure, After the water is injected to work, it is checked whether there is a leak part. The high pressure check is to check the water injected so that the high water pressure works.

This atmospheric pressure check confirms whether there is leakage in the state where atmospheric pressure is applied, so there is no problem in the experiment, but in the experiment in which the pressure is applied, it is necessary to confirm the correct working pressure.

That is, in the case of a low-pressure and high-pressure inspection, a pressure gauge is connected to a part of the piping, and a low-pressure or high-pressure fluid is supplied to the inside of the piping. In the case of such a low-pressure or high-pressure inspection, a pressure gauge is installed in a pipe already installed, and a pressure gauge must be sensed, so that a pressure gauge is connected to a part of the pipe by welding or the like. There is a problem that the piping may be damaged and the damaged piping must be reinstalled.

In order to solve this problem, a device for checking the water density by connecting a pressure gauge to the end of a pipe using a predetermined connecting means has been developed and used. There are various kinds of water density checking devices, and examples thereof are Patent Documents 1 and 2.

In Patent Document 1, when the nut and the rubber tube are inserted into the testing pipe, the tube and the rubber tube are inserted into the testing pipe. When the nut is tightened, the tube rides on the inclined surface of the tapered tube to push the bushing and the bushing tightens the rubber tube to expand the diameter, So that the pressure transmitted through the through hole of the component supporting tube can operate the pressure gauge assembled to the threaded portion,

Patent Document 2 discloses a hydraulic pressure checking apparatus for checking the water density of a pipe by installing a pressure gauge in a pipe for transmitting a fluid. The pressure gauge is installed at one end of the pipe and is inserted into the pipe to transmit the pressure inside the pipe to the pressure gauge A pressure delivery conduit; And a pair of fixing means installed between the fixing nuts at both ends of the pressure transmission pipe for fixing the pressure transmission pipe to the inside of the pipe, wherein the fixing means is installed at the end of the pressure transmission pipe, A stationary ring closely attached between the tubes; A pressure washer provided on one side of the stationary ring; A tapered tube installed at one side of the pressure washer and having a conical outer peripheral surface; An inner jaw provided on one side of the taper pipe and having an inner surface formed with a conical hole and a plurality of wedges formed on the outer peripheral surface; And a pressurizing pipe which moves to the inner jaw by tightening the fixing nut and pushes the jaw and the taper pipe and the pressure washer.

Among such conventional water density checking devices, Patent Document 1 has a simple structure, but is fixed to the inside of a testing pipe with only a rubber tube and a bushing, so that the rubber tube is not firmly fixed to the piping, so that the pressure gauge is separated from the piping .

In the case of Patent Document 2, it is possible to prevent pressure leakage by firmly fixing to a testing pipe for high pressure. However, since the structure is complicated, it takes a lot of cost to manufacture and the manufacturing process becomes complicated.

1. Korea Utility Model Registration No. 0146894 2. Korean Patent Registration No. 0825996

The present invention has been developed in order to solve the above problems, and it is an object of the present invention to provide a low-pressure pipe water-tightness check which is firmly fixed to an end portion of a pipe to prevent a pressure gauge from being separated by a water pressure or a pressure supplied to the inside of the pipe And it is an object of the present invention to provide a water pressure-confirming apparatus.

Particularly, it is a water pressure check device for low density piping water density check which is installed in low pressure piping and is relatively simple in construction compared to high pressure piping, easy to manufacture, and can reduce manufacturing cost by simplifying manufacturing process The purpose is to provide.

In order to achieve the above-mentioned object, a water pressure check apparatus for checking the water density of a low-pressure pipe is provided with a pressure gauge in a pipe for transferring fluids such as gas or liquid to check the water density of the pipe, A pressure transmission pipe having a pressure gauge installed at one end thereof, a pressure transfer pipe inserted into the pipe to transmit a pressure inside the pipe to the pressure gauge, and a bolt head formed at one end; Two tightening nuts tightened at one end of the pressure transmission pipe and at the inside of the bolt head; A stationary ring installed at an end of the pressure transmission pipe and inserted into the pipe to be pushed by a guide plate moved by tightening the tightening nut to come in close contact with an inner surface of the pipe; And a cover plate installed inside the tightening nut and hooked to the end of the pipe.

And a cylindrical end collar is further provided between the cover plate and the guide plate.

And a base plate may be further provided on the inside of the tightening nut on the side opposite to the bolt head.

As described above, the hydraulic pressure checking apparatus for checking the water density of the low-pressure piping according to the present invention is more firmly fixed to the end of the piping, thereby preventing the pressure gauge from being separated by the water pressure or the air pressure supplied into the piping have.

Further, the present invention has the effect of reducing manufacturing costs by simplifying the manufacturing process, reducing the material required for manufacturing, and being easy to manufacture because the structure is relatively simple compared to that for high-pressure piping.

1 is a cross-sectional view of an example of a water pressure check apparatus for checking water number density of a low-pressure pipe according to the present invention
2 is a perspective view of an example of a water pressure check apparatus for water pipe density checking of a low pressure pipe according to the present invention
3 is an exploded perspective view of an example of a water pressure check apparatus for water pipe density checking of a low pressure pipe according to the present invention
4 is a cross-sectional view of the installation state of the water pressure check apparatus for checking the water density of the low-pressure pipe according to the present invention

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

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

The hydraulic pressure checking apparatus for checking the water density of the low-pressure piping according to the present invention can be supplied at low cost since the structure is simplified and the manufacturing is easy.

   The water pressure checking apparatus for checking the water density of a low-pressure pipe according to the present invention includes a pressure gauge (200) installed in a pipe (100) for transmitting a fluid such as a gas or a liquid to check the water density of the pipe, The pressure gauge 200 is installed at one end of the pipe 100 and is inserted into the pipe 100 to transmit the pressure inside the pipe 100 to the pressure gauge 200 and the bolt head 10b A formed pressure delivery pipe (10); Two tightening nuts (20, 80) tightened at one end of the pressure transmission pipe (10) and at the inside of the bolt head (10b); Two guide plates 30g installed at the end of the pressure transmission pipe 10 and inserted into the pipe 100 and moved by tightening the tightening nuts 20 and 80; A stationary ring 30 which is pushed by both guide plates 30g and whose outer circumferential surface is brought into close contact with the inner surface of the pipe; And a cover plate (40) installed inside the tightening nut (20) and hooked to an end of the pipe (100).

As shown in FIGS. 2 to 4, the pressure transmission pipe 10 is a hollow tube, and a screw thread is formed on the outer circumferential surface thereof to tighten the tightening nuts 20 and 80. At one end of the pressure transmission pipe 10, Is formed.

4, when the pressure gauge 200 is installed after inserting the pressure transmission pipe 10 into the pipe 10, when the pressure gauge is rotated to tighten the pressure gauge, It is a means to hold the pressure transmission pipe so that it does not rotate because the pressure gauge can not be connected to the pressure transmission pipe firmly by rotating together.

The tightening nuts 20 and 80 are means for pushing the guide plate 30g provided between them to the side of the stationary ring 30 and are provided with a tightening nut provided at an end of the pressure transmission pipe facing the inside of the pipe 100 80 are preferably fixed at a predetermined position and then fixed with pins or the like so as not to be loosened.

1 through 4, the tightening nut 20 is installed in a portion of the bolt head 10b facing the pipe 100 and is installed between the two tightening nuts 20 and 80 The fixing ring 30 is brought into close contact with the inner wall of the pipe 100 so that the hydraulic pressure check device is fixed to the inside of the pipe 100.

That is, by tightening the tightening nut 20, the distance between the tightening nuts 80 is narrowed, and the two guide plates 30g provided at both ends of the fixing ring 30 are pressed to fix the fixing ring 30 from both sides When the pressure is applied, the fixing ring 30 is expanded in the direction of the outer peripheral surface so that the outer peripheral surface of the fixing ring is brought into close contact with the inner wall of the pipe 100.

When the pressure gauge 200 is fixed to the inside of the pipe 100 only by the fixing ring 30, the pressure gauge 200 for checking the water density of the low-pressure pipe according to the present invention is shaken in the process of installing the pressure gauge 200 on the pressure transfer pipe 10 A clearance may be formed between the stationary ring and the inner wall of the pipe, so that the cover plate 40 is further provided at a portion facing the end of the pipe 100.

That is, when the tightening nut 20 is tightened with the inner wall of the cover plate 40 closely aligned with the end of the pipe 100, the cover plate 40 presses the pressure transmission pipe 10 against the pipe 100 The cover plate 40 is supported by the end portion of the pipe so that the pressure of the pressure plate 30g is reduced. The transmission pipe will not be shaken.

When the fixing ring 30 is fixed at a position adjacent to the end of the pipe, it is preferable that the fixing ring is located inside the pipe because the coupling force between the pipe and the pressure transmission pipe may be weakened. It is preferable that a cylindrical end collar 50 is further provided between the guide plate 30g and the guide plate 30g.

The end collar 50 is made of a hard material such as metal or synthetic resin so that the tightening force of the tightening nut 20 is transmitted to the stationary ring 30 through the guide plate 30g.

Further, a base plate 60 is further provided inside the tightening nut 80 on the side opposite to the bolt head.

The base plate 60 is a circular ring having a diameter equal to or smaller than that of the guide plate 30g in order to firmly push the guide plate 30g having a relatively larger area than the tightening nut 80. [

Further, a washer 70 may be further provided on the inside of the tightening nuts 20 and 80, and the washer is a means for preventing the tightening nut from loosening.

10: Pressure transmission pipe
10b: Bolt head
20, 80: Fastening nut
30: Retaining ring
30g: guide plate
40: Cover plate
50: end collar
60: base plate
70: Washer

Claims (3)

A hydraulic pressure check device for measuring the water density of a pipe for inspecting the water density of a pipe by installing a pressure gauge (200) in a low pressure pipe (100) for transmitting a fluid,
A pressure transfer pipe 10 having a pressure gauge 200 installed at one end thereof and inserted into the pipe 100 to transmit pressure inside the pipe to the pressure gauge and having a bolt head 10b at the end of the pressure gauge, ;
Two tightening nuts 20 and 80 tightened at one end of the pressure transmission pipe 10 and at the inside of the bolt head 10b to push the two guide plates 30g toward the stationary ring 30;
Two guide plates 30g installed at the stop of the pressure transmission pipe 10 and inserted into the pipe to press the fixing ring 30 at both sides by tightening the tightening nuts 20 and 80;
A stationary ring 30 which is pressed from both sides by the two guide plates 30g and extends in the direction of the outer peripheral surface so that the outer peripheral surface thereof is brought into close contact with the inner surface of the pipe;
A cover plate (40) installed inside the tightening nut (20) and hung on the end of the pipe to prevent the pressure transmission pipe (10) from shaking;
A cylindrical end collar provided between the cover plate 40 and the guide plate 30g on the side of the tightening nut 20 so that the tightening force of the tightening nut 20 is transmitted to the stationary ring 30 through the guide plate 30g, (50);
And a base plate (60) provided between the tightening nut (80) and the guide plate (30g) opposite to the bolt head (10b) for pushing the guide plate (30g) .

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KR1020150099207A 2015-07-13 2015-07-13 hydraulic pressure detector for low pressure pipe KR101728954B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150099207A KR101728954B1 (en) 2015-07-13 2015-07-13 hydraulic pressure detector for low pressure pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150099207A KR101728954B1 (en) 2015-07-13 2015-07-13 hydraulic pressure detector for low pressure pipe

Publications (2)

Publication Number Publication Date
KR20170008017A KR20170008017A (en) 2017-01-23
KR101728954B1 true KR101728954B1 (en) 2017-04-20

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KR1020150099207A KR101728954B1 (en) 2015-07-13 2015-07-13 hydraulic pressure detector for low pressure pipe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109141736A (en) * 2018-08-16 2019-01-04 广东联塑科技实业有限公司 A kind of hydraulic test fixture

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0146894B1 (en) 1994-12-28 1998-10-01 배순훈 Intelligent regulating system and its control method
KR100825996B1 (en) 2006-09-13 2008-04-28 김상열 Hydraulic pressure dector for checking water tighting of pipe

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