US3585964A - Apparatus operable by pressure fluid to generate pressure waves in a medium - Google Patents
Apparatus operable by pressure fluid to generate pressure waves in a medium Download PDFInfo
- Publication number
- US3585964A US3585964A US828157A US3585964DA US3585964A US 3585964 A US3585964 A US 3585964A US 828157 A US828157 A US 828157A US 3585964D A US3585964D A US 3585964DA US 3585964 A US3585964 A US 3585964A
- Authority
- US
- United States
- Prior art keywords
- pressure
- valve
- valves
- medium
- pressure fluid
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 30
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 125000006850 spacer group Chemical group 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000010720 hydraulic oil Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86389—Programmer or timer
- Y10T137/86405—Repeating cycle
- Y10T137/86421—Variable
Definitions
- the present invention provides a very simple and cheap apparatus which is driven by pressure fluid, is safe in operation and has a long useful life.
- the chief characteristic feature of the novel apparatus is that it comprises a valve system arranged in a cycle flow conduit for the pressure fluid and comprising two valves, one at each end of a channel through which extends a movable spacer rod having a length such that always either one of said valves is in its open position, the valve which is situated at the entrance for the pressure fluid having a valve body smaller than that of the other valve and being adapted to be opened by a lesser pressure than said other valve, said apparatus comprising moreover a branch tube or pipe extending from the channel and a membrance which is positioned on said branch tube, is in contact with the preferably liquid or gaseous medium to be treated and is adapted to transmit pressure variations created in said valve system to said medium in the form of pressure waves.
- a device for reducing the rate of pressure drops arising due to said pressure variations is arranged in the return line of said cycle flow conduit for the pressure fluid.
- the apparatus comprises a valve system in the cycle flow conduit for a pressure fluid such as for instance hydraulic oil.
- the valve system comprises two springloaded ball valves 1 and 2 positioned at the two ends of a channel 3 such as a tube or pipe.
- valve 1 The ball or valve body 4 of valve 1 is smaller than the ball or valve body 5 of valve 2, their sizes being for example and mm. respectively.
- the springs 7 and 8 acting upon balls 4 and 5, respectively, are proportioned in such a manner that valve 2 requires greater pressure for being opened (opening pressure) than valve 1; these respective opening pressures may be for instance of the order of magnitude of 50-100 kg./cm.'* for valve 2 as against 10 kg./cm. for valve 1.
- Valve 1 has an inlet 9 for admitting hydraulic oil from a pump (not shown) while valve 2 has an outlet 10 through which the oil flows back to the pump.
- Within the channel 3 there is a spacer rod 6 which is movable back and forth together with and is secured to balls 4 and 5.
- Rod 6 is of a length such that always either one of the valves is maintained in the open position, with a play of for instance about 1 mm.
- each of the valve seats is tapered, and preferably comprises a conical surface.
- the rod is guided in guide means (not shown) so that it is prevented from lateral movement in the channel 3.
- a branch conduit ll extends'to a membrane 12 which is in contact with the medium to be acted upon by the apparatus.
- the membrane is made of temper-hardened steel.
- the apparatus is operated as follows:
- valve 1 In the starting position of the apparatus (as shown in the drawing), valve 1 is open and valve 2 is closed due to the fact that valve 2 has a stronger spring and a larger ball.
- valve 2 When hydraulic oil of a pressure higher than the opening pressure of valve 2 is pumped in through inlet 9 valve 2 will open and act on spacer rod 6 so as to close valve 1, and hydraulic oil will flow out and back to the pump via outlet 10.
- valve 1 closes-valve 2 opens-valve 2 closes-valve 1 opens etc.
- the pressure variations created thereby in the channel will act on the membrane to make it vibrate, thus generating pressure waves in the medium with which it is in contact.
- the apparatus is employed for e.g. mass transportation in a medium it is suitable to arrange on the return line to the pump a means 13, for example a valve, for reducing the pressure drop rate in the channel.
- a means 13 for example a valve
- the frequency and amplitude of the pressure waves to be created depend on the practical purpose for which the apparatus is used in each individual case. Usually, the frequency is at least oscillations per second; it is dependent on the length and mass of the spacer rod, the spring coefficient of the stronger spring, and other factors.
- the amplitudes of the pressure waves may suitably be within the range of about 50 to 100 kg.cm.
- the apparatus according to the present invention has given extremely good results when employed for destroying contagious matter in sewage or waste water.
- the apparatus according to this invention is to be used in the first place for generating pressure waves in liquid or gaseous media it has been found useful also for generating pressure waves in solid media. Thus for instance, it may be employed for actuating mechanical tools such as drills for rock drilling, nut tighteners of the impact type, and the like.
- An apparatus operable by pressure fluid for generating pressure waves in a fluid medium comprising a valve system which is arranged in a cycle flow conduit for the pressure fluid and has two valves, one at each end of a channel surrounding a movable spacer rod which is respectively secured at its opposite ends to one of said valves and has a length such that always either one of the valves is in open position, the valve positioned nearest to the entrance of the pressure fluid into the apparatus having a valve body smaller than that of the other valve and being adapted for being opened by lesser pressure than said other valve, said apparatus further comprising a branch tube extending from the channel intermediate said valves and a membrane which is positioned on said branch tube, is on its side facing away from the branch tube in contact with said fluid medium, and is adapted to transmit pressure variations generated in said valve system to said medium in the form of pressure waves.
- An apparatus further comprising means for reducing the rate of pressure drops arising due to said pressure variations, said means being arranged on the return line of said cycle flow conduit for the pressure fluid.
- An apparatus operable by pressure fluid for generating pressure waves in a solid medium comprising a valve system which is arranged in a cycle flow conduit for the pressure fluid and has two valves, one at each end of a channel surrounding a movable spacer rod which is respectively secured at its opposite ends to one of said valves and has a length such that always either one of the valves is in open position, the valve positioned nearest to the entrance of the pressure fluid into the apparatus having a valve body smaller than that of the other valve and being adapted for being opened by lesser pressure than said other valve, said apparatus further comprising a branch tube extending from the channel intermediate said valves and a membrane which is positioned on said branch tube, is on its side facing away from the branch tube in contact with said medium, and is adapted to transmit pressure variations generated in said valve system to said medium in the form of pressure waves.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Reciprocating Pumps (AREA)
- Multiple-Way Valves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7474/68A SE320217B (enrdf_load_stackoverflow) | 1968-06-04 | 1968-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3585964A true US3585964A (en) | 1971-06-22 |
Family
ID=20271469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US828157A Expired - Lifetime US3585964A (en) | 1968-06-04 | 1969-05-27 | Apparatus operable by pressure fluid to generate pressure waves in a medium |
Country Status (5)
Country | Link |
---|---|
US (1) | US3585964A (enrdf_load_stackoverflow) |
DE (1) | DE1927703A1 (enrdf_load_stackoverflow) |
FR (1) | FR2010130A1 (enrdf_load_stackoverflow) |
GB (1) | GB1251281A (enrdf_load_stackoverflow) |
SE (1) | SE320217B (enrdf_load_stackoverflow) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100125259A1 (en) * | 2008-11-19 | 2010-05-20 | Jonathan Scott Olson | Dynamic, reduced-pressure treatment systems and methods |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2313991A (en) * | 1941-02-12 | 1943-03-16 | Bendix Westinghouse Automotive | Brake mechanism |
US3326237A (en) * | 1965-04-12 | 1967-06-20 | Union Carbide Corp | Repeating pneumatic timer |
US3419030A (en) * | 1964-11-20 | 1968-12-31 | Gratzmuller Jean Louis | Fast evacuation valve |
-
1968
- 1968-06-04 SE SE7474/68A patent/SE320217B/xx unknown
-
1969
- 1969-05-27 US US828157A patent/US3585964A/en not_active Expired - Lifetime
- 1969-05-30 DE DE19691927703 patent/DE1927703A1/de active Pending
- 1969-06-04 FR FR6918387A patent/FR2010130A1/fr not_active Withdrawn
- 1969-06-04 GB GB1251281D patent/GB1251281A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2313991A (en) * | 1941-02-12 | 1943-03-16 | Bendix Westinghouse Automotive | Brake mechanism |
US3419030A (en) * | 1964-11-20 | 1968-12-31 | Gratzmuller Jean Louis | Fast evacuation valve |
US3326237A (en) * | 1965-04-12 | 1967-06-20 | Union Carbide Corp | Repeating pneumatic timer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100125259A1 (en) * | 2008-11-19 | 2010-05-20 | Jonathan Scott Olson | Dynamic, reduced-pressure treatment systems and methods |
US8465465B2 (en) | 2008-11-19 | 2013-06-18 | Kci Licensing, Inc. | Dynamic, reduced-pressure treatment systems and methods |
Also Published As
Publication number | Publication date |
---|---|
SE320217B (enrdf_load_stackoverflow) | 1970-02-02 |
GB1251281A (enrdf_load_stackoverflow) | 1971-10-27 |
DE1927703A1 (de) | 1969-12-11 |
FR2010130A1 (enrdf_load_stackoverflow) | 1970-02-13 |
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