CN1179831A - Compact sleeve air gun - Google Patents
Compact sleeve air gun Download PDFInfo
- Publication number
- CN1179831A CN1179831A CN 96192918 CN96192918A CN1179831A CN 1179831 A CN1179831 A CN 1179831A CN 96192918 CN96192918 CN 96192918 CN 96192918 A CN96192918 A CN 96192918A CN 1179831 A CN1179831 A CN 1179831A
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- mentioned
- air
- pipe box
- end cap
- air cannon
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005188 flotation Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000002153 concerted effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Jet Pumps And Other Pumps (AREA)
Abstract
A sleeve air gun (10) for releasing compressed air into water. The air gun housing (12) has a chamber enclosed (16), with an end cap (20). The end cap is engaged with the air gun housing with a retainer (22) that is light weight and expedites the engagement and disengagement of the end cap and housing. The retainer can comprise a light weight ring that engages the housing and end cap. The retaininer uniquely permits larger diameter air guns to be constructed without disproportionately increasing the weight of the air gun. The larger diameter air gun expedites the discharge of compressed air from the air gun, which maximizes the acoustic pulse generated in the water.
Description
Background of invention
The present invention relates to survey the air cannon of using in the operation in oceanic earthquake.Particularly, the present invention has introduced a kind of sleeve gun of compact conformation, and it has increased the volume of air cannon chamber thorax under the situation that does not increase air cannon weight substantially.
Oceanic earthquake survey operation all to write down from the seabed and below some sound waves of some geologic structures reflections.These sound waves are produced by the air that some air cannons discharge under compression 2000 and the 6000psi pressure.The sound pulse that single air cannon produces is amplified by some the other air cannons in the seismic survey array, so that produce some bigger sound waves.These sound waves are reflected by seabed and some geologic structure layers and are detected by some register instruments, and these register instruments have some and are used for sound wave is transformed into the sensor of electric signal.These signals go on record, and handle subsequently so that obtain the geologic structure model on surface.
Usual air cannon is that pressurized air is stored in the sleeve pipe.Pressurized air discharges by some outlets that valve is housed in the sleeve pipe.D/d air forms a bubble in water, produce an acoustic pressure pulse.An electrically-energized spiral winding is being controlled the action and the compressed-air actuated release of valve.A kind of example of air cannon is published in Harrison, in No. the 4th, 623,033, the United States Patent (USP) of Jr, is characterized in, air cannon has some outlets that valve is housed that are distributed in 360 degree around the air cannon sleeve pipe.The valve of outlet comprises a shuttle along the axially reciprocating of air cannon.
Described a kind of air cannon that has improved in No. the 5th, 365,493, the United States Patent (USP) of Harrison (1994), it can quicken the motion of shuttle when air cannon is launched.The 5th, 001,679 of another piece United States Patent (USP)s at Harrison disclose another kind of air cannon structure, are characterized in it being to adopt two shuttles to operate to discharge this pressurized air from cavity.Because it can quicken the release of pressurized air from cavity when air cannon is launched, thereby this pair of shuttle notion can improve the efficient of air cannon and the output of corresponding sound wave.
Usual air cannon has been added a threaded connector between the cap of rifle body and sealing bore end.Therefore because the volume of this threaded connector has increased weight significantly, the usual air cannon weight that will reduce threaded connector must be done quite carefully, and the volume that wants to increase bay must be done quite longly.Because this quite long air cannon can not resemble than short air cannon and discharge pressurized air effectively, thereby usual structure just can not be increased to Weight-to-Length Ratio to greatest extent effectively.
Because when towboat is that some flotation gears are being supported these air cannons in the seismic survey array during by the waters, and paravane distribution flotation gear and air cannon, thereby the weight of air cannon is very important.If the weight of air cannon increases, then for the weight of support air rifle, flotation gear just must increase equally.Because the resistance that those less flotation gears of the resistance ratios that bigger flotation gear stands stand is little, so bigger flotation gear just requires the bigger energy that drags, but also need bigger paravane, so that keep the air gun arrays spread in water.
Therefore, just have a kind of demand for improved sleeve gun, this air cannon can increase the acoustic pressure that air cannon produces under the situation of not obvious increase air cannon weight.
Summary of the invention
The invention provides a kind of being used for pressurized air is discharged into air cannon in the surrounding environment.A pipe box has constituted stores compressed-air actuated air chamber, is used for discharging compressed-air actuated outlet but also constitute one.Valve movably is associated with air chamber, is used for opening selectively this outlet.An actuator drives this outlet of valve open selectively and pressurized air is discharged, and terminal cap closes the pipe box air chamber, and a steady arm removably is connected this terminal cap on the pipe box.
In another embodiment of the present invention, two opposite air cannons can be connected in series, make corresponding two shuttles oppositely move, so that the running of this pair of balance air cannon.This pipe box can be columnar basically, and the width of this pipe box equates substantially that with the length of pipe box the acoustic pressure that air produces in being released in so that handle contracts increases to greatest extent.
The accompanying drawing summary
Fig. 1 illustrates the sectional view that adopts a kind of air cannon of the present invention.
The sectional view of air cannon when Fig. 2 illustrates shuttle and is shown in an open position.
Fig. 3 illustrates the situation of two air cannons of the formed combination air cannon that is connected in series.
Preferred embodiment is introduced
The invention provides an improved sleeve air cannon, it has increased the volume of air cannon air chamber under the condition that does not increase air cannon weight basically.Fig. 1 illustrates air cannon 10, and in general, it comprises a pipe box 12 and shuttle 14.There is a usefulness to decide the main gas tank 16 that stores compressed-air actuated internal capacity in the pipe box 12.The wall of main gas tank 16 is provided with outlet 18, so that control the pressurized air release of environment towards periphery selectively.
When pressurized air entered elastic force chamber 28, this pressurized air had just entered main gas tank 16 by air-filled pore 38 simultaneously.Because main gas tank 16 is more much bigger than elastic force chamber 28, thereby air pressure is accumulated to and can stops before shuttle moves to off-position in main gas tank 16, compressed-air actuated pressure the end 30 of shuttle with regard to roof pressure in elastic force chamber 28, shuttle is just being closed main gas tank 16, air pressure in elastic force chamber 28 and the main gas tank 16 just reaches the pressure that is full of entirely in several seconds, and at this moment shuttle 14 just remains on this off-position, is activated up to air cannon 10.
Air cannon 10 is started for actuator 24 energisings.A Promotion From Within valve (not shown) is left its sealing station, and makes pressurized air flow to transmission channel 40.This pressurized air burden flow is crossed passage 40, and is directed to second end face 42 of shuttle and contacts.This compressed-air actuated charging is stopped by the chimb 44 that overhangs of second end 42 and can not flow out air cannon 10, and because the surface area of second end 42 greater than the surface area of first end 30, thereby till this pressurized air charging also can roof pressure the pressurized air of second end 42 in main gas tank 16 and be released.Because the surface area of surface area ratio first end of second end is big, so the compressed-air actuated power that acts on second end 42 is just significantly big than the power that acts on first end in the elastic force chamber.This force unbalance that is caused by the difference of surface area has just caused the motion of shuttle away from flange 36.In this motion process, face seal 34 just from returning with flange 36 contact positions, is opened so that will export 18, and 16 pressurized air enters surrounding environment with regard to the face of the flange 36 that flow in the main gas tank.
The bigger force unbalance that is produced by two different surface areas of pressurized air roof pressure first end 30 that charges into and second end 42 makes shuttle 14 quicken to leave flange 36.When extra air flows out and when crossing flange 36, this makes a concerted effort to continue to increase from main gas tank 16.Just before shuttle 14 made chimb 44 generation gaps, this power of opening valve reached its highest level, and at this moment the pressurized air of main gas tank 16 advances surrounding environment by some outlet 18 dischargings of spending around the opening 360 of shuttle 14.Because shuttle 14 continues to quicken, thereby other outlet 18 parts will open owing to the motion of shuttle, and this has just increased the circulation area of exhaust outlet and has increased the mass rate of emission of air from main gas tank 16.
This airflow that discharges rapidly in the ambient water forms one from the outside spherical bubbles of air cannon 10 acceleration.Because the high accelerating velocity of spherical bubbles, the interface of bubble space and water just produces an acoustic pressure wave.When quickened at the interface of bubble/water, this pressure wave continued to increase, and when the interfacial velocity of bubble/water had reached maximum, this acoustic pressure just reached peak value.
Because the volume of air chamber 16 is fixed, so the mass rate of emission of air reduces with the increase of bubble volume.Thisly concern that 6 have limited the maximum sound pressure that can reach.In order to offset the influence that this air supply reduces, the present invention makes the airflow area have maximum opening ratio, and its method is to larger-diameter air chamber 16 of air cannon design and corresponding shuttle 14.Increase exponentially with the increase of air chamber diameter because export 18 useful area, compare mutually with traditional air cannon, atmospheric air chamber 16 disclosed in this invention and shuttle 14 have increased significantly and have exported 18 surface area.This result is attainable, because the present invention has reduced end cap 20 is connected to the weight of the legacy device on the pipe box 12 significantly.
When shuttle 14 moved to as shown in Figure 2 open position, shuttle 14 was led by the wear ring 46 of low friction.These wear rings 46 are interchangeable, and they also can avoid shuttle 14 to contact with the surface of pipe box 12.
When source of high pressure air continues to act on pressure on second end 42 of shuttle 14 when reducing, just deceleration of shuttle 14 to elastic force chamber 28 inflation and when the pressurized air that fills.Be reduced to after tensile force (product of the surface area of second end of the air pressure of main gas tank 16 and shuttle) equals the level of the power of closing (product of the surface area of first end of the pressure of elastic force chamber 28 and shuttle) in the air pressure of main gas tank 16, shuttle has just arrived open position as shown in Figure 2.Subsequently, when the pressure in the elastic force chamber 28 increased, shuttle 14 just can turn back to off-position as shown in Figure 1, and air cannon is emission inflation next time again.
Because can use multiple air cannon 10 in the earthquake prospecting, emission sensor 48 is launched with regard to each air cannon 10 of signaling, thereby the emission of these air cannons 10 can be synchronous.Emission sensor 48 be included on shuttle first end 30 magnet 50 and attached to the cell winding on the end cap 20 52.When shuttle 14 proximity transducer coils 52, magnet 50 just produces an electric signal, is delivered to an air cannon monitor (monitor does not draw) and regulates transponder pulse afterwards, so that make the emission of air cannon 10 synchronous.
Please referring to Fig. 1 and Fig. 2, steady arm 22 is generally by split ring 54, and locating ring 56 and loading circle (load ring) 58 are formed.When taking down split ring 54, locating ring 56 just can be removed, and encircles so that can contact and remove to load.Remove loading ring 58 and just can remove end cap 20, as long as make end cap 20 longitudinally pass through the central shaft of main gas tank 16.This dismounting makes the inner body of air cannon 10 install and use easily, also is convenient to change wear ring 46 and all inner seal.These characteristics have improved the ability that the maintenance personal repaired and changed the air cannon inner body at the scene significantly.Spot repair is easy like this to be very desirable, because it has reduced the time of maintenance and replacing operation.Key pin 60 can prevent the rotation of cap 20 with respect to pipe box.
As be ready, can in main gas tank 16, can insert some gas chamber volume cushion block (not shown)s and change from the volume of the air of air cannon 10 releases.As is known in the industry, so light material of air chamber cushion block used weight is made as plastics or aluminium, so that regulate the volume of main gas tank under the condition of the weight that does not significantly increase air cannon 10.Steady arm 66 has made things convenient for the dismounting of plunger 68, thereby the gas chamber volume cushion block can insert main gas tank 16 fast and takes out from main gas tank 16.
In another embodiment of the present invention as shown in Figure 3, can couple together first rifle 62 with opposite second rifle 64, produce an air cannon group that constitutes by two rifles.Steady arm 66 is connected to first rifle 62 on second rifle 64, and plunger 68 provides a rigid internal retainer for shuttle 70 and 72, also the air chamber of each air cannon is sealed simultaneously.This configuration of the present invention can prevent recoil with the shuttle 70 and 72 of loading onto two opposite balances.This embodiment of the present invention is more desirable than traditional two shuttle air cannons, because the present invention has comprised two actuators 74 and 76, can launch simultaneously after sending transmitting, and replaces usually findable single actuator in two shuttle air cannons.The advantage of this two emissions has reduced possible imbalance significantly, and this imbalance is to transmit signal for two shuttles by single actuator by the path in the rifle body to cause.This two being also advantageous in that and providing more accurate control to each shuttle of launching.This benefit of bringing is a particular importance for the consistance that keeps the running of elastic force chamber and each shuttle.In addition, the air cannon that this kind advantage of the present invention allows to utilize some to be connected in series is formed a kind of new air cannon, and this new air cannon has some characteristics different with single air cannon.This advantage arranges that in the seismic survey array dirigibility aspect the air cannon can reduce the air cannon unnecessary on the seismic survey ship and the deposit of part, and has increased operating efficiency effectively.
Because above-mentioned reason the present invention has done great improvement to the conventional air rifle.And the present invention reduces to 1 to the dynamic seal (packing) of shuttle from 3.For gas chamber volume, the invention provides a kind of lighter air cannon, and this lighter weight can reduce connection air cannon and the rope chain of water float device and the wearing and tearing of shackle again.
The element that should be understood that paintings steady arm 22 can comprise many structure and concrete schemes that belong to the scope of the invention.Although steady arm 22 makes up as ring and draws in one embodiment, as if the also various mechanical component of steady arm are dismountable pin, clip (clip), fastener, clasp, the mechanical component that being suitable for of retarding spring and other keeps end cap 20 to be connected with pipe box 12.In some other possible embodiment of the present invention, steady arm 22 may be that a machinery disconnects part, and it can be connected on the pipe box 12 fast, also can disassemble from pipe box 12 fast.
Although the present invention has used some preferred embodiment to be described, understand all that for the common personage of industry the notion that the present invention is proposed all can change and improve and not depart from scope of the present invention here.The embodiments described herein is the illustration of notion of the present invention only, and should not regard limitation of the scope of the invention as.
Claims (18)
1. one kind is used for pressurized air is discharged into the air cannon of environment, and it comprises:
A pipe box, its constitutes one and stores compressed-air actuated air chamber, but also constitute a permission pressurized air is discharged into outlet the environment from air chamber;
A valve can move with respect to above-mentioned pipe box, so that optionally close an above-mentioned outlet part.
An actuator is used for optionally moving above-mentioned valve, so that open above-mentioned outlet and allow pressurized air to be discharged into environment;
An end cap is used for sealing above-mentioned tube chamber, and
A steady arm is used for removably above-mentioned end cap being connected to aforementioned tube and puts.
2. according to the described a kind of air cannon of claim 1, it is characterized in that: this pipe box is columnar basically, and above-mentioned end cap is sealing an end of this cylinder pipe box.
3. according to the described a kind of air cannon of claim 1, it is characterized in that: above-mentioned steady arm is a ring basically, is used for that end cap is connected aforementioned tube and puts.
4. according to the described a kind of air cannon of claim 1, it is characterized in that: above-mentioned steady arm is made of one first ring and one second ring, and first ring is used for that above-mentioned end cap is connected aforementioned tube and puts, and second ring is used for preventing that first ring from moving.
5. according to the described a kind of air cannon of claim 1, it is characterized in that: also comprise a key pin, be used for preventing the relative motion between above-mentioned end cap and the pipe box.
6. according to the described a kind of air cannon of claim 1, it is characterized in that: comprise that also is connected second pipe box that aforementioned tube puts, second valve in second pipe box, second actuator that is used for optionally making second valve motion, and one be used for removably one second end cap is connected second steady arm on above-mentioned second pipe box.
7. according to the described a kind of air cannon of claim 1, it is characterized in that: can separate with above-mentioned pipe box in order to make above-mentioned valve, above-mentioned end cap be make dismountable.
8. according to the described a kind of air cannon of claim 1, it is characterized in that: above-mentioned steady arm is one and disconnects part, unloads down so that apace above-mentioned end cap is connected on the pipe box and from pipe box.
9. according to the described a kind of air cannon of claim 1, it is characterized in that: above-mentioned valve is a columnar shuttle basically.
10. one kind is used for pressurized air is discharged into the air cannon of environment, and it comprises:
One is the pipe box of cylinder basically, and its constitutes one and stores compressed-air actuated air chamber, but also constitute a permission pressurized air is discharged into outlet the environment from air chamber;
One is the valve of cylinder basically, and it can move with respect to above-mentioned pipe box, so that optionally close an above-mentioned outlet part.
An actuator, it is to be used for optionally moving above-mentioned valve, so that open above-mentioned outlet and close above-mentioned outlet, opening is to be in order to hold the pressurized air of increase in order to allow compressed-air actuated release, to close;
One is the end cap of annulus basically, is used for sealing above-mentioned tube chamber, and
A steady arm is used for removably above-mentioned end cap being connected to aforementioned tube and puts.
11. according to the described a kind of air cannon of claim 10, it is characterized in that: it also comprises a key pin, is used for preventing the relative motion between above-mentioned end cap and the pipe box.
12. according to the described a kind of air cannon of claim 10, it is characterized in that: above-mentioned steady arm keeps being tightly connected of above-mentioned end cap and pipe box.
13. according to the described a kind of air cannon of claim 10, it is characterized in that: it also comprises a passage, is used for transmitting the pressurized air from above-mentioned actuator, so that quicken opening of above-mentioned valve.
14. an energy discharges the acoustic pressure that is produced in the water inlet to pressurized air and is increased to air cannon to greatest extent, it comprises:
A pipe box, its constitutes one and stores compressed-air actuated air chamber, but also constitute a permission pressurized air is discharged into outlet the environment from air chamber, the width that it is characterized in that above-mentioned pipe box substantially with the equal in length of this pipe box.
A valve, it can move with respect to above-mentioned pipe box, so that the optionally above-mentioned outlet of closed portion.
An actuator, it is to be used for optionally moving above-mentioned valve, so that open above-mentioned outlet and allow pressurized air to be discharged into environment;
An end cap is used for sealing tube chamber, and
A steady arm is used for removably above-mentioned end cap being connected to aforementioned tube and puts.
15. according to the described a kind of air cannon of claim 14, it is characterized in that: above-mentioned steady arm is a ring basically, is used for that end cap is connected aforementioned tube and puts.
16. according to the described a kind of air cannon of claim 14, it is characterized in that: above-mentioned steady arm also comprises one first ring and one second ring, first ring is used for that above-mentioned end cap is connected aforementioned tube and puts, and second ring is used for preventing the motion of first ring with respect to above-mentioned pipe box.
17. according to the described a kind of air cannon of claim 14, it is characterized in that: above-mentioned air cannon can be connected on the second reverse air cannon, so that the valve of two above-mentioned air cannons is along the central shaft counter motion.
18. according to the described a kind of air cannon of claim 14, it is characterized in that: above-mentioned steady arm is one and disconnects part, unloads down so that apace above-mentioned end cap is connected on the pipe box and from pipe box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96192918 CN1179831A (en) | 1995-03-31 | 1996-03-25 | Compact sleeve air gun |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/414,583 | 1995-03-31 | ||
| CN 96192918 CN1179831A (en) | 1995-03-31 | 1996-03-25 | Compact sleeve air gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1179831A true CN1179831A (en) | 1998-04-22 |
Family
ID=5128541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96192918 Pending CN1179831A (en) | 1995-03-31 | 1996-03-25 | Compact sleeve air gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1179831A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842284A (en) * | 2017-03-03 | 2017-06-13 | 中国石油天然气集团公司 | The shooting on group method of mud gun epicenter drilling tool and mud gun epicenter |
-
1996
- 1996-03-25 CN CN 96192918 patent/CN1179831A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842284A (en) * | 2017-03-03 | 2017-06-13 | 中国石油天然气集团公司 | The shooting on group method of mud gun epicenter drilling tool and mud gun epicenter |
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