KR20170099502A - Diaphragmless shock tube using a free piston system - Google Patents

Diaphragmless shock tube using a free piston system Download PDF

Info

Publication number
KR20170099502A
KR20170099502A KR1020160021628A KR20160021628A KR20170099502A KR 20170099502 A KR20170099502 A KR 20170099502A KR 1020160021628 A KR1020160021628 A KR 1020160021628A KR 20160021628 A KR20160021628 A KR 20160021628A KR 20170099502 A KR20170099502 A KR 20170099502A
Authority
KR
South Korea
Prior art keywords
chamber
pressure chamber
pressure
leak
free piston
Prior art date
Application number
KR1020160021628A
Other languages
Korean (ko)
Other versions
KR101796484B1 (en
Inventor
김희동
이재형
Original Assignee
(주)대주기계
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)대주기계 filed Critical (주)대주기계
Priority to KR1020160021628A priority Critical patent/KR101796484B1/en
Publication of KR20170099502A publication Critical patent/KR20170099502A/en
Application granted granted Critical
Publication of KR101796484B1 publication Critical patent/KR101796484B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
    • B01J3/08—Application of shock waves for chemical reactions or for modifying the crystal structure of substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L99/00—Subject matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Clinical Laboratory Science (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

A non-diaphragm shockwave tube using a free piston,
A high-pressure chamber in a closed form; A low pressure chamber having one end inserted into the interior of the high pressure chamber; A leak chamber provided at an inner side of the high pressure chamber; And a free piston which is installed inside the leak chamber so as to be movable in the left and right direction to open and close the tip of the low pressure chamber
It is possible to carry out the repetitive shock wave experiment easily while reducing the time and manpower required for the experiment preparation such as the diaphragm replacement and the like without generating debris or debris in the shock wave generation process.

Description

DIAPHRAGMESS SHOCK TUBE USING A FREE PISTON SYSTEM WITH FREE PISTON

The present invention relates to a seam-free shockwave tube using a free piston, and more particularly, to a seawater shockwave tube that uses a free piston to open a low-pressure chamber through an opening / closing rubber that expands or shrinks according to a pressure of a gas filled in a leak chamber, So that repeated experiments can be performed without replacement of the diaphragm.

Fig. 1 is a schematic view of a general shock wave tube, and Fig. 2 is an example of a membrane of a diaphragm.

Generally, as shown in FIG. 1, the shock tube 10 has a simple structure of a high pressure chamber 11, a low pressure chamber 12, and a diaphragm 13 for separating the high pressure chamber 11 and the low pressure chamber 12.

The shock wave tube (10) is an apparatus that obtains shock waves in a low pressure tube through an instantaneous flow generated by a diaphragm (13).

The shock wave tube 10 has been developed in various forms to date, and has recently been widely used not only for aerospace but also for medical machinery.

The shock wave generated by the membrane of the diaphragm 13 in the shock wave tube 10 shown in Fig. 1 propagates in the form of a compressed wave toward the low pressure chamber 12, and when the shock wave propagates to the low pressure chamber 12, The expansion wave propagates in the chamber (11).

When these waves propagate inside the tube and are reflected at the closed end of the tube or the open end of the pipe, a very complex flow occurs.

On the other hand, since the shock wave obtained by the shock wave tube is accompanied by an instantaneous pressure and a temperature rise and propagates at a very high speed, there is a demand in recent years for an industrial demand which utilizes such a characteristic.

In the engineering applications of the shockwave tube, the strength (pressure rise) and propagation speed of the shock wave are mainly determined by the pressure ratio of the high-pressure chamber and the low-pressure chamber and the thickness of the material of the diaphragm. Therefore, So that it can be easily obtained.

The diaphragm material is made of cellophane or synthetic vinyl which is very thin to generate a weak shock wave when the working pressure ratio of the shock wave tube is low, and copper plate or iron plate may be used to generate a very strong shock wave.

As shown in Fig. 2, the diaphragm of such a diaphragm has a form such as a natural diaphragm due to a pressure difference between a high pressure plate and a low pressure plate of a shock wave tube and a forced diaphragm due to a needle or the like from the outside.

Fig. 2 (a) shows the state of the natural wave film, and Fig. 2 (b) shows the wave film by the declination.

The most important problems encountered in the application of most shockwave tubes are the problem of reproducibility of the shock wave tube process and contamination by debris or debris generated during the wave process.

FIG. 3 is a view showing debris or debris generated in the process of rupturing.

Generally, even if the pressure ratio of the shock wave tube is the same, the details of the wave propagation process will vary depending on the experiment, and it is very difficult to precisely control the wave propagation process.

In addition, debris such as debris from faults is generated, which is an important technical problem to be solved in the engineering application of the shock wave tube.

Therefore, it is troublesome to carry out new experiment after cleaning up such pollutants. Moreover, since the diaphragm can not be regenerated after the membrane, it is necessary to replace it with a new diaphragm material every time. It is becoming a limiting factor.

The following Patent Document 1 discloses an improved shock tube structure.

Korean Patent Laid-Open Publication No. 10-1994-0009116 (published May 16, 1994)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art and its object is to prevent generation of debris or debris in the shock wave generation process by generating a shock wave by opening a low pressure chamber through a free piston without breaking the diaphragm The present invention is to provide a seam-free shock-absorbing tube using a free piston, which enables a repetitive shock wave experiment to be performed more easily while reducing the time and manpower required for preparation of experiments such as diaphragm replacement.

In order to accomplish the above object, according to the present invention, there is provided a zero-diaphragm shock wave tube using a free piston, comprising: a high-pressure chamber in a closed form; A low pressure chamber having one end inserted into the interior of the high pressure chamber; A leak chamber provided at an inner side of the high pressure chamber; And a free piston which is installed inside the leak chamber so as to be movable in the left and right direction to open and close the tip of the low pressure chamber.

The non-diaphragm shockwave pipe using the free piston according to the present invention comprises: an auxiliary chamber provided at one side of the leak chamber to receive gas discharged from the leak chamber; And an auxiliary piston movably installed in the interior of the auxiliary chamber so as to open and close an exhaust hole provided at one side of the leak chamber.

The pressureless chamber using the free piston according to the present invention is characterized in that the low pressure chamber is filled with gas having a pressure lower than the pressure of the gas filled in the high pressure chamber and is higher than the pressure of the gas filled in the high pressure chamber inside the leak chamber Pressure gas is filled.

The free-piston diaphragm shock tube using the free piston according to the present invention is characterized in that the free piston is provided with an adherent body on one side of the moving body.

The non-diaphragm shockwave pipe using the free piston according to the present invention is characterized by including a release chamber provided at one side of the auxiliary chamber and pressing the auxiliary piston.

The unshielded shockwave tube using the free piston according to the present invention is characterized in that an instantaneous opening / closing valve is installed in the release chamber.

The pressureless diaphragm shock tube using the free piston according to the present invention is characterized in that the pressure of the filled gas in the release chamber is set to be greater than the pressure of the gas filled in the leak chamber.

The non-diaphragm shockwave pipe using the free piston according to the present invention is characterized in that an induction slope is provided at the tip of the low pressure chamber.

According to the present invention, the shock wave can be generated more accurately, and the shock wave propagates to the low-pressure chamber, so that no debris or debris is generated due to the wave.

Therefore, according to the present invention, since the diaphragm does not need to be replaced, the time required for the preparation of the experiment can be greatly reduced by using the free-piston diaphragm shock tube using the free piston.

Further, according to the seawater-free shock wave tube using the free piston according to the present invention, it is possible to repeatedly perform the shock wave experiment by reusing the high-pressure chamber and the low-pressure chamber.

In addition, according to the present invention, the flow generated during the flow of the gas in the high-pressure chamber into the low-pressure chamber can be reduced, and the reproducibility of the shock wave generated in the low- .

1 is a structural view of a general shock wave tube,
Fig. 2 is an example of a membrane of a diaphragm,
FIG. 3 is a view showing debris or debris generated in the process of membrane breaking,
FIG. 4 is a schematic view of a seawall-free shock wave tube using a free piston according to a preferred embodiment of the present invention. FIG.
FIG. 5 is a longitudinal sectional view showing a main part of a seam-free shock-wave tube using a free piston according to another embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown.

In the following, the terms "upward", "downward", "forward" and "rearward" and other directional terms are defined with reference to the states shown in the drawings.

FIG. 4 is a view illustrating the construction of a seam-free shock-wave tube using a free piston according to a preferred embodiment of the present invention.

The non-segregated shockwave tube 100 according to the preferred embodiment of the present invention includes a high pressure chamber 110, a low pressure chamber 120, a leak chamber 130, a free piston 140, an auxiliary chamber 150, an auxiliary piston 160 ), And a release chamber 170.

The high-pressure chamber 110 is in a sealed state at all sides, and a high-pressure gas is filled therein.

The low-pressure chamber 120 has a smaller diameter than the high-pressure chamber 110 and has one end inserted into the high-pressure chamber 110.

The low pressure chamber 120 is filled with a gas having a pressure lower than the pressure of the gas filled in the high pressure chamber 110.

The leak chamber 130 is provided on one side of the interior of the high-pressure chamber 110 for transferring the free piston 140 from side to side.

The leak chamber 130 is filled with gas having a pressure higher than that of the gas filled in the high-pressure chamber 110.

An exhaust hole 131 is provided at one side of the leak chamber 130.

The free piston 140 opens and closes the tip of the low-pressure chamber 120 and is installed to be movable in the left-right direction within the leak chamber 130.

The free piston 140 has a shape in which an adherent body 142 is provided on one side of a moving body 141 which is installed to be movable in the left and right direction in the leak chamber 130.

The auxiliary chamber 150 receives the gas discharged from the leak chamber 130 and is provided at one side of the leak chamber 130.

The auxiliary piston 160 opens and closes the exhaust hole 131 of the leak chamber 131 and is installed in the auxiliary chamber 150 so as to be movable in the left and right directions.

The release chamber 170 is for pressing the auxiliary piston 160 and is provided at one side of the auxiliary chamber 150.

The release chamber 170 is provided with an instantaneous on-off valve 180 that allows the gas filled therein to be discharged to the outside.

In the seawall-free shockwave tube 100 using the free piston according to the preferred embodiment of the present invention, the pressure Ps2 of the gas filled in the leak chamber 130 is lower than the pressure Ph of the gas filled in the high-pressure chamber 110 .

Accordingly, the free piston 140 installed in the leak chamber 130 moves toward the low-pressure chamber 120 to seal the tip of the low-pressure chamber 120.

The pressure Ps1 of the gas filled in the release chamber 170 in the non-segregated shockwave pipe 100 using the free piston according to the preferred embodiment of the present invention is determined by the pressure of the gas filled in the leak chamber 130 Ps2).

 The auxiliary piston 160 installed in the auxiliary chamber 150 moves toward the leak chamber 130 to seal the exhaust hole 131 of the leak chamber 130.

The instantaneous on-off valve 180 of the release chamber 170 is opened in the non-diaphragm shockwave pipe 100 using the free piston according to the preferred embodiment of the present invention so that the high-pressure gas filled in the release chamber 170 is discharged to the outside The pressure inside the release chamber 170 is drastically lowered.

When the internal pressure of the release chamber 170 is lowered, the auxiliary piston 160 acting on the pressure of the filled gas of the leak chamber 130 moves toward the release chamber 170, The exhaust hole 131 is opened.

When the exhaust hole 131 of the leak chamber 130 is opened, the gas inside the leak chamber 130 escapes to the auxiliary chamber 150, so that the internal pressure of the leak chamber 130 is lowered into the high pressure chamber 110 It becomes lower than the internal pressure.

When the internal pressure of the leak chamber 130 becomes lower than the internal pressure of the high pressure chamber 110, the free piston 140 moves to the leak chamber 130 by the pressure of the high pressure chamber 110, The high pressure gas filled in the high pressure chamber 110 is spread to the low pressure chamber 120 and the shock wave is generated inside the low pressure chamber 120 like the conventional shockwave pipe 10 .

As described above, according to the preferred embodiment of the present invention, the non-diaphragm shockwave pipe 100 using the free piston is connected to the low-pressure chamber through the free piston 140, which is moved in the lateral direction according to the pressure of the gas filled in the leak chamber 130. [ (120) is closed and opened.

Accordingly, the low-pressure chamber 120 is opened according to the movement of the free piston 140, and no debris or debris is generated due to the rupture during the propagation of the shock wave to the low-pressure chamfer 120.

In addition, since it is not necessary to replace the diaphragm, the time required for preparing the experiment can be greatly reduced, and the high-pressure chamber 110 and the low-pressure chamber 120 can be reused to perform repetitive shock wave experiments.

5 is a vertical cross-sectional view of a main part of a seam-free shock wave tube using a free piston according to another embodiment of the present invention.

5, the non-diaphragm shockwave pipe 100 using the free piston has the induction slope 121 at the tip of the low-pressure chamber 120. As shown in FIG.

The induction slope part 121 provided at the distal end of the low pressure chamber 120 in the non-segregated shockwave tube 100 according to another embodiment of the present invention is configured such that the low pressure chamber 120 is opened from the high pressure chamber 110 at a moment when the low pressure chamber 120 is opened, The gas of the high-pressure chamber 110 moving to the chamber 120 is more smoothly guided to the low-pressure chamber 120 side.

In FIG. 5, reference numeral 190 is an O-ring.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

100: No-seawater shock wave tube
110: high pressure chamber
120: Low pressure chamber
130: leak chamber
140: Free piston
150: auxiliary chamber
160: auxiliary piston

Claims (8)

A high pressure chamber (110) in the form of an enclosed space;
A low pressure chamber (120) having one end inserted into the high pressure chamber (110);
A leak chamber 130 provided at one side of the interior of the high pressure chamber 110;
And a free piston (140) installed in the leak chamber (130) so as to be movable in the left and right direction to open and close the tip of the low pressure chamber (120). The method according to claim 1,
An auxiliary chamber 150 provided at one side of the leak chamber 130 to receive gas discharged from the leak chamber 130;
And an auxiliary piston (160) movably installed in the auxiliary chamber (150) to open and close an exhaust hole (131) provided at one side of the leak chamber (131) No septum shock wave tube. The method according to claim 1,
A pressure lower than the pressure of the gas filled in the high pressure chamber 110 is filled in the low pressure chamber 120 and a pressure higher than the pressure of the gas filled in the high pressure chamber 110 inside the leak chamber 130 Is filled with the gas of the free piston. The method according to claim 1,
Wherein the free piston (140) is provided with an adherent body (142) on one side of the moving body (141). 3. The method of claim 2,
And a release chamber (170) provided on one side of the auxiliary chamber (150) and pressing the auxiliary piston (160). 6. The method of claim 5,
Wherein the release chamber (170) is provided with an instantaneous opening / closing valve (180) for releasing the gas filled in the release chamber (170) to the outside. 6. The method of claim 5,
Wherein the pressure Ps1 of the gas filled in the release chamber 170 is set to be larger than the pressure Ps2 of the gas filled in the leak chamber 130. The free- The method according to claim 1,
Characterized in that the induction slope part (121) is provided at the tip end of the low pressure chamber (120).
KR1020160021628A 2016-02-24 2016-02-24 Diaphragmless shock tube using a free piston system KR101796484B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160021628A KR101796484B1 (en) 2016-02-24 2016-02-24 Diaphragmless shock tube using a free piston system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160021628A KR101796484B1 (en) 2016-02-24 2016-02-24 Diaphragmless shock tube using a free piston system

Publications (2)

Publication Number Publication Date
KR20170099502A true KR20170099502A (en) 2017-09-01
KR101796484B1 KR101796484B1 (en) 2017-11-10

Family

ID=59923787

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160021628A KR101796484B1 (en) 2016-02-24 2016-02-24 Diaphragmless shock tube using a free piston system

Country Status (1)

Country Link
KR (1) KR101796484B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021147805A1 (en) * 2020-01-21 2021-07-29 成都奇点无限科技有限公司 Double-tube connection structure for detonation synthesis, detonation synthesis device and application thereof
CN113468832A (en) * 2021-08-02 2021-10-01 中国空气动力研究与发展中心超高速空气动力研究所 Two-dimensional simulation method for shock tube diaphragm rupture process based on overlapped moving grids
CN115155681A (en) * 2022-06-30 2022-10-11 天津大学 Membrane-free shock tube and sampling system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102266227B1 (en) 2020-10-22 2021-06-17 (주)대주기계 Hydrogen gas generation device by shock wave

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7104226B2 (en) 2018-05-31 2022-07-20 大王製紙株式会社 Tissue paper packaging

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021147805A1 (en) * 2020-01-21 2021-07-29 成都奇点无限科技有限公司 Double-tube connection structure for detonation synthesis, detonation synthesis device and application thereof
GB2607777A (en) * 2020-01-21 2022-12-14 Chengdu Infinite Singularity Tech Co Ltd Double-tube connection structure for detonation synthesis, detonation synthesis device and application thereof
GB2607777B (en) * 2020-01-21 2024-05-22 Chengdu Infinite Singularity Tech Co Ltd Double-tube connection structure for detonation synthesis, detonation synthesis device and application thereof
CN113468832A (en) * 2021-08-02 2021-10-01 中国空气动力研究与发展中心超高速空气动力研究所 Two-dimensional simulation method for shock tube diaphragm rupture process based on overlapped moving grids
CN113468832B (en) * 2021-08-02 2023-02-24 中国空气动力研究与发展中心超高速空气动力研究所 Two-dimensional simulation method for shock tube diaphragm rupture process based on overlapped moving grids
CN115155681A (en) * 2022-06-30 2022-10-11 天津大学 Membrane-free shock tube and sampling system
CN115155681B (en) * 2022-06-30 2023-09-05 天津大学 Membraneless Shock Tube and Sampling System

Also Published As

Publication number Publication date
KR101796484B1 (en) 2017-11-10

Similar Documents

Publication Publication Date Title
KR101796484B1 (en) Diaphragmless shock tube using a free piston system
NO20084232L (en) Procedure for suspension of rudders in wells
GB2445344A (en) Methods and systems for hydrostatic testing a pipeline
ES411090A1 (en) Recovery and repair of offshore pipelines
CN105408562B (en) Sealing plug for closing holes in walls and the like
RU2014148748A (en) EXPLOSIVE COUPLING AND POSITIVE INDICATION OF OPENING OF THE HYDRAULIC FRACTURE COUPLING
EP0288745A3 (en) Sealing device
KR101796482B1 (en) Diaphragmless shock tube
JP2005528239A (en) Hydraulic device for reciprocating mechanical parts, and mold clamping unit of an injection molding machine provided with the hydraulic device
JP2016527084A (en) Electrohydraulic molding machine for plastic deformation of the projected part of the wall of the workpiece to be molded
GB2433565A (en) A stab connector for use in subsea applications
US3561239A (en) Apparatus for forming metals by means of jet liquid
US3770080A (en) Device for generating acoustic waves by implosion
JP6742215B2 (en) Gas stopper removing jig and gas stopper removing method using the same
RU2018140891A (en) COMPENSATOR UNIT FOR MARINE SOURCE OF SEISMIC SIGNALS AND METHOD
JP2009538406A (en) Method and apparatus for an actuator system
GB2367107B (en) Underwater tool
CN114082827A (en) Thin pipe forming device and method
CN214685056U (en) Gas-liquid pressurized tensioner for pipe inner butt joint device
JP2006122943A (en) Nozzle for hydraulic forming, and hydraulic forming apparatus
CN209511248U (en) Pneumatic actuator
CN102878426A (en) Filling joint
CN105965205A (en) Fracture splitting apparatus
JP6837474B2 (en) Dynamic impact processing force generation equipment
JP5146755B2 (en) Pipe cutting method

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
GRNT Written decision to grant