KR101126114B1 - Airtight test apparatus - Google Patents

Abstract

An invention for a gas tight experimental apparatus is disclosed. The disclosed hermetic testing device includes: a support member installed on the frame member and supporting one side of the bellows assembly to be sealed; An elevating member that elevates to press the bellows assembly supported by the support member; And a sealing member pressurizing the bellows assembly by lifting and lowering the lifting member to seal both sides of the bellows assembly together with the supporting member and to form a high pressure inside the bellows assembly.

The hermetic testing device according to the present invention can quickly and conveniently perform the hermetic test operation of the bellows assembly by applying pneumatic pressure while lowering the sealing member to seal both ends of the bellows assembly placed on the support member.

Bellows Assembly, Airtight, Test, Pneumatic, Support, Sealing

Description

Confidential Experiment Device {AIRTIGHT TEST APPARATUS}

The present invention relates to an airtight test apparatus, and more particularly, to an airtight test apparatus for quickly and conveniently performing airtight test work of the bellows assembly by applying pneumatic pressure while sealing both ends of the bellows assembly.

In general, the bellows-type expansion pipe is a pipe member used for the purpose of buffering and absorbing vibration shock in precision equipment requiring high vacuum, elasticity, stability, and vibration absorption in various fields such as aerospace, semiconductor manufacturing, and nuclear facilities. It is a kind of.

Bellows type expansion tube (hereinafter referred to as expansion tube) is a bellows assembly to withstand the expansion and contraction of each section of the pipe member in order to prevent the pipe member from being expanded and damaged by the high temperature fluid moving therein. Equipped with.

1 is a view showing the configuration of a typical expansion pipe.

Both sides of the bellows assembly 10 is provided with a pipe member 16 which is spaced apart from each other at regular intervals.

The bellows assembly 10 includes a bellows 12 for extending or contracting when the pipe member 16 is expanded, a pair of flange members 18 positioned at both ends of the bellows 12, and a flange member ( 18, there is provided a connection joint 14 connecting each other to restrain excessive expansion of the bellows 12.

The bellows 12 is configured to be expanded or folded by giving a corrugated metal tube of different diameters.

The connecting joint 14 forms a threaded portion at both ends of the connecting shaft which is inserted into the hole of the flange member 18, and the bellows 12 is expanded by the temperature of the fluid moving inside by tightening the nut on the screwed portion. The expansion of the bellows 12 is limited by the support of the connecting shaft.

As such, the bellows assembly 10 is very susceptible to the high pressure of the fluid moving inside the pleated portion of the bellows 12 and the welding of the flange member 18, so that the airtight test must be performed before sale after manufacture. It is preferable.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

However, in the related art, since the airtightness of the bellows assembly must be manually checked manually, the test work is very cumbersome, and there is a problem in that the productivity of the bellows assembly is significantly reduced.

Thus, there is a need for improvement.

The present invention has been created by the necessity as described above, by applying a pneumatic pressure in a state in which both ends of the bellows assembly placed on the support member by lowering the sealing member to perform the airtight test operation of the bellows assembly quickly and conveniently It is an object to provide an airtight experimental apparatus.

In order to achieve the above object, an airtight test apparatus according to an embodiment of the present invention includes: a support member installed on a frame member and supporting one side of a bellows assembly to be sealed; An elevating member that elevates to press the bellows assembly supported by the support member; And a sealing member pressurizing the bellows assembly by lifting and lowering the lifting member to seal both sides of the bellows assembly together with the supporting member and to form a high pressure inside the bellows assembly. .

An airtight test apparatus according to an embodiment of the present invention includes: a support member installed on a frame member and supporting one side of a bellows assembly to be sealed; An elevating member that elevates to press the bellows assembly supported by the support member; A guide member for guiding the movement of the elevating member; And a sealing member pressurizing the bellows assembly by lifting and lowering the lifting member to seal both sides of the bellows assembly together with the supporting member and to form a high pressure inside the bellows assembly. .

In addition, the frame member is formed by connecting a plurality of frames to each other, the lower portion of the frame member is characterized in that it comprises a moving wheel to help the movement.

In addition, the support member is a support plate coupled to the frame member; A table member placed on the support plate and supporting one end of the bellows assembly; And a sealing member placed on the table member to seal one end of the bellows assembly.

In addition, the sealing member is an O-ring, characterized in that the upper surface of the table member is formed with a plurality of installation grooves are formed in a ring shape recessed differently from each other based on the center point so that the sealing member is settled.

In addition, the elevating member is a lifting plate for fixing the sealing member; And a power member fixed to the frame member so as to elevate the lifting plate to provide power.

In addition, the guide member is fixed to the lifting member, a plurality of guide shafts for guiding the lifting; A bearing member installed on the frame member to smoothly move the guide shaft; And it characterized in that it comprises a connecting member for connecting the guide shaft to each other.

In addition, the connecting member is formed in a plate-like shape, characterized in that the center is formed with a through hole through which the power member passes.

In addition, the sealing member is a cone member for sealing the upper side of the bellows assembly; A fixing plate for fixing the upper side of the cone member; One end is coupled to the fixed plate, the other end is coupled to the lifting plate to cushion the shock applied to the cone member; And the sealing member is characterized in that it comprises a pressure generating member for supplying a high pressure to the interior of the bellows assembly.

In addition, the pressure generating member is connected to the fixed plate, the connecting pipe for supplying compressed air into the cone member; An air supply unit connected to the connection pipe and generating high pressure compressed air; And a pressure display unit for measuring the internal pressure of the bellows assembly by the high pressure compressed air applied by the air supply unit.

As described above, the airtight test apparatus according to the present invention performs a quick and convenient airtight test operation of the bellows assembly by applying pneumatic pressure while lowering the sealing member to seal both ends of the bellows assembly placed on the support member. can do.

Hereinafter, an airtight test apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

2 is a perspective view of the hermetic testing apparatus according to an embodiment of the present invention, FIG. 3 is a front view of the hermetic testing apparatus shown in FIG. 2, FIG. 4 is a side view of the hermetic testing apparatus shown in FIG. 2, and FIG. 5. Is a view showing a state in which air is supplied in a sealed state of the bellows assembly in the hermetic testing apparatus according to an embodiment of the present invention.

2 to 5, the airtight test apparatus according to an embodiment of the present invention is installed on the frame member 20, the support member 30 for supporting one side of the bellows assembly 20 to be sealed, The bellows assembly 20 is pressed by the lifting and lowering of the lifting member 40 and the lifting member 40 so as to pressurize the bellows assembly 20 supported by the supporting member 30. In addition, a sealing member 60 is formed to seal both sides of the bellows assembly 20 and to form a high pressure in the bellows assembly 10.

As shown in FIG. 1, the bellows assembly 10 includes a pair of flange members positioned at both ends of the bellows 12 and the bellows 12, which allow the pipe member 16 to expand or contract when the pipe member 16 is expanded. 18) and a connection joint 14 connecting the flange member 18 with each other to restrain excessive expansion of the bellows 12.

Frame member 20 is formed by connecting a plurality of frames to each other. The frame member 20 is preferably formed in a rectangular parallelepiped shape formed to be long upward.

The lower portion of the frame member 20 includes a moving wheel 22 to assist the movement.

The four wheels 22 are preferably formed on each of the four corners of the frame member 20, one each.

 The supporting member 30 is placed on the supporting plate 32 coupled to the frame member 20, the supporting plate 32, and the table member 34 and the table member 34 supporting one end of the bellows assembly 10. And a sealing member 38 placed and sealing one end of the bellows assembly 10.

The sealing member 38 is preferably an O-ring having a circular or polygonal cross section.

The table member 34 is preferably a circular plate body having a constant thickness as a whole. Of course, it may be a plate body having a polygonal shape or other various shapes such as square, pentagon, hexagon.

The upper surface of the table member 34 is formed with a plurality of installation grooves 36 are formed in a ring shape recessed in a different radius with respect to the center point so that the sealing member 38 is settled.

The installation groove 36 also preferably has a hemispherical or semi-polygonal shape to match the cross section of the sealing member 38.

The elevating member 40 includes an elevating plate 42 for fixing the sealing member 42 and a power member 44 fixed to the frame member 20 to elevate the elevating plate 42 to provide power.

It is preferable that the lifting plate 42 is a rectangular plate body.

The power member 44 uses a hydraulic or pneumatic cylinder.

The elevating plate 42 is coupled to the shaft end of the cylinder, which is the power member 44, to move up and down.

The hermetic testing device of the present invention further includes a guide member 50 for guiding the movement of the elevating member 40.

The guide member 50 is fixed to the elevating member 40, and the plurality of guide shafts 52 for guiding the lifting and lowering of the bearing members 54 installed on the frame member 20 to smooth the movement of the guide shafts 52. ) And a connecting member 56 for connecting the guide shaft 52 to each other.

The connecting member 56 is formed in a plate shape, and a through hole 58 through which the upper end of the power member 44 passes is formed at the center thereof.

Of course, the connecting member 56 may be formed in a rod type or other various shapes to connect the upper ends of the pair of guide shafts 52 with respect to the center of the power member 44, respectively.

The sealing member 60 seals the upper side of the bellows assembly 10 to the cone member 62 for supplying high pressure air, the fixing plate 64 for fixing the upper side of the cone member 62, and the fixing plate 64. One end is coupled, the other end is coupled to the elevating plate 42, the shock absorbing member 66 and the sealing member 60 to cushion the shock applied to the cone member 62 is applied to the inside of the bellows assembly (10) It comprises a pressure generating member 70 for supplying.

The cone member 62 may be formed in a conical shape, and a circular plane having a smaller size than the upper surface may be formed on an opposite surface of the upper surface in contact with the fixing plate 64.

Referring to FIG. 5, one side of the cone member 62 includes a discharge hole 63 for supplying compressed air of high pressure into the bellows assembly 10.

The cone member 62 uses an elastic material such as rubber or synthetic resin.

Most preferably, the cone member 62 uses urethane.

In addition, since the cone member 62 is formed to be inclined continuously with portions having different radii according to vertical heights, one cone member 62 may block all of the openings of one side of the bellows assembly 10 having different sizes. have.

The fixing plate 64 is preferably formed to match the upper surface corresponding to the bottom surface of the cone member 62.

The shock absorbing member 66 is formed in a cylindrical shape as an elastic material such as rubber or synthetic resin, and has a fastening member such as a screw or bolt connecting the fixing plate 64 and the elevating plate 42 to each other at the center thereof.

The pressure generating member 70 is connected to the fixed plate 64, and connected to the connection pipe 74 for supplying compressed air to the inside of the cone member 62, the connection pipe (74), and generates high pressure compressed air It comprises an air supply unit 72 and a pressure display unit 76 for measuring the internal pressure of the bellows assembly 10 by the high pressure compressed air applied from the air supply unit 72.

The air supply unit 72 is preferably an air compressor.

The pressure display unit 76 is preferably a pressure gauge, and the pressure gauge is installed to be connected to the inner space of the cone member 62 on the upper side of the fixed plate 64.

On the other hand, the high-pressure compressed air supplied from the air supply unit 72 is supplied into the bellows assembly 10 through the discharge hole 63 through the inner space of the cone member 62, the bellows assembly 10 It is determined whether the internal pressure of the bellows assembly 10 passes the test by checking whether or not the internal pressure of the endurance is higher than the reference pressure, and the outside is coated with soapy water and there is no leakage.

Or less, on the basis of the accompanying drawings to look at the operation and action of the gas tight experimental apparatus according to an embodiment of the present invention.

First, as shown in Figures 2 to 5, the operator placed the table member 34 on the upper surface of the support plate 32, the bellows assembly 10 to measure the water pressure, and formed a plurality of arranged at regular intervals Install the sealing member 38 in the installation grooves 36 as many as necessary.

Then, the flange member 18 of the bellows assembly 10 is placed in contact with the table member 34.

Then, when the lifting plate 42 fixed to the cylinder shaft, which is the power member 44 by pressing the operation unit (not shown), the cone member 62 coupled to the lifting plate 42 and the fixed plate 64 connected to each other is lowered. To enter the upper opening of the bellows assembly 10.

And, as shown in Figure 5, while the strong contact is made to any one of the outer peripheral surface of the outer peripheral surface of the radius of the cone member 62 is elastically close, the sealing is made tightly.

At this time, the lower flange portion 18 of the bellows assembly 10 is in close contact with the sealing member 38 placed in the seating groove 36 of the table member 34 by the downward movement of the cone member 62. Since the lower part is also in a sealed state, both ends of the bellows assembly 10 remain in airtight state.

In this state, the high pressure generates compressed air from the air supply unit 72, which is the pressure generating member 70, through the connection pipe 74 and the discharge hole 63 of the cone member 62 of the bellows assembly 10. It flows into the bellows 12.

Subsequently, the pressure gauge 76 is used to determine whether the internal pressure of the bellows assembly 10 withstands the reference pressure or higher, and also the soap water in the bellows 12 and other parts of the bellows assembly 10. The bellows assembly 10 determines whether the test passes by checking whether or not there is a leaking part by applying a back.

As such, the above-described state is repeatedly performed, so that the airtight experiment of the bellows assembly 10 can be performed quickly and conveniently, thereby improving test workability.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

As described above, the bellows assembly 10 has been described as an example, but the airtight test apparatus of the present invention is a very useful invention that can be used to determine the airtightness of various pipe members.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1 is a view showing the configuration of a typical expansion pipe.

Figure 2 is a perspective view of the hermetic testing apparatus according to an embodiment of the present invention.

Figure 3 is a front view of the gas tight experimental apparatus shown in FIG.

Figure 4 is a side view of the gas tight experimental apparatus shown in FIG.

Figure 5 is a view showing a state in which air is supplied in a sealed state bellows assembly in the gas tight experimental apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: bellows assembly 20: frame member

22: moving wheel 30: support member

34: sealing member 38: sealing member

40: lifting member 50: guide member

60: sealing member 62: cone member

64: fixed plate 66: buffer member

70: pressure generating member 72: air supply

Claims (10)

A support member installed on the frame member and supporting one side of the bellows assembly to be sealed; An elevating member that elevates to press the bellows assembly supported by the support member; And And pressurizing the bellows assembly by lifting and lowering the lifting member to seal both sides of the bellows assembly together with the supporting member and to form a high pressure inside the bellows assembly. The sealing member, the cone member for sealing the upper side of the bellows assembly; A fixing plate for fixing the upper side of the cone member; One end is coupled to the fixed plate, the other end is coupled to the lifting plate cushioning member for cushioning the impact applied to the cone member; And The sealing member is airtight experimental apparatus comprising a pressure generating member for supplying a high pressure to the interior of the bellows assembly. A support member installed on the frame member and supporting one side of the bellows assembly to be sealed; An elevating member that elevates to press the bellows assembly supported by the support member; A guide member for guiding the movement of the elevating member; And And a sealing member pressurizing the bellows assembly by lifting up and down the sealing member to seal both sides of the bellows assembly together with the supporting member and to form a high pressure inside the bellows assembly. The sealing member, the cone member for sealing the upper side of the bellows assembly; A fixing plate for fixing the upper side of the cone member; One end is coupled to the fixed plate, the other end is coupled to the lifting plate cushioning member for cushioning the impact applied to the cone member; And The sealing member is airtight experimental apparatus comprising a pressure generating member for supplying a high pressure to the interior of the bellows assembly. The method according to claim 1 or 2, The frame member is formed by connecting a plurality of frames to each other, The airtight experiment apparatus, characterized in that the lower portion of the frame member includes a moving wheel to help move. The method of claim 1, wherein the support member A support plate coupled to the frame member; A table member placed on the support plate and supporting one end of the bellows assembly; And And a sealing member placed on the table member to seal one end of the bellows assembly. The method of claim 4, wherein The sealing member is an O-ring, The upper surface of the table member is a gas tight experimental apparatus, characterized in that a plurality of installation grooves are formed recessed in a ring shape with a different radius from the center point so that the sealing member is settled. According to claim 1 or claim 2, wherein the lifting member An elevating plate for fixing the sealing member; And A gas tight experimental apparatus, characterized in that it comprises a power member which is fixed to the frame member to provide a power to the lifting plate. The method of claim 2, wherein the guide member A plurality of guide shafts fixed to the elevating member to guide the elevating; A bearing member installed on the frame member to smoothly move the guide shaft; And Airtight experiment apparatus comprising a connecting member for connecting the guide shaft to each other. The method of claim 7, wherein The connecting member is formed in a plate shape, the airtight experimental apparatus, characterized in that the through-hole is formed through the power member in the center. delete According to claim 1 or 2, wherein the pressure generating member A connection pipe connected to the fixed plate and configured to supply compressed air to the inside of the cone member; An air supply unit connected to the connection pipe and generating high pressure compressed air; And And a pressure indicator configured to measure the internal pressure of the bellows assembly by the high pressure compressed air applied by the air supply unit.

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