DE1525651A1 - Pressure vessel - Google Patents

Description

The invention relates to pressure vessels and in particular to pressure accumulators in which there is a difference between the speed of the pressure medium flow into the corresponding chamber of the accumulator and the speed of the pressure medium flow out of the corresponding chamber of the accumulator »

Druojcapeioher are often used in systems to absorb sudden pressure mediums ia deJii pressure lines and to prevent pressure medium from hydraulic actuation, which are used in -a & % situation.

Such sudden changes

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90 998 2/070 $

to intercept teleboots, have

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the pressure accumulators are generally relatively large Liquid opening, which is an unrestricted plus results in the corresponding pressure medium chamber of the memory. Also enables the liquid opening of the storage tank an unrestricted flow of pressure medium from the corresponding Pressure medium chamber out, and the memory is equipped with a flexible partition, preferably with a deformable bladder that separates the partition between the gas chamber and the liquid chamber of the storage tank, which are loaded with grass or with oil under pressure, and there is a sudden big difference between the pressure on the inside of the accumulator and the on the outside of the store, it will be due to the higher Pressure on the inside of the memory the bladder that yes is compressed, expanding quickly

Because of this rapid expansion of the bladder and when the Liquid opening remains open, the unrestricted Pressure medium flow the hydraulic actuator cause the movable member controlled by them to move at an excessive speed to perform, resulting in mechanical failures.

The aim of the invention is therefore to create a pressure accumulator, which has only a few items that are easy to use

minor

can be assembled at low cost, "and the im significant instantaneous sudden pressure surges record in the hydraulic system! the pressure medium should from the memory with a relatively low flow out at a controlled speed without looking at it the height, the pressure difference between the inside and the outside of the tank,

The invention is aa hand of the drawing for the sake of play explained. There is a round of dance

1 shows a longitudinal section through a pressure accumulator,

2 shows a detailed view in longitudinal section, with the oil opening of the store can be seen,

2a shows a partial section of the valve member in closed position ner position, whereby individual files are broken off *

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3 an upper aneiofct of the valve member a

4 shows a schematic representation of a
Installation form of the storage tank,

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909582/0708

A pressure vessel, for example a pressure accumulator (Figo 1) has a substantially cylindrical container 11 rigid material such as steel or aluminum, the can resist the pressures to which it is subjected during operation.

The container 11 has a closed end 12 in which a bushing 13 is seated in an axial bore 14. The inner The end 15 of the socket 13 has an outwardly turned off Annular flange 16, which is on the circumference of the axial bore 14 sits, and the socket 13 is for example with the help a weld 17 attached.

A bore 18 of the socket 13, which forms an opening, through which pressure medium can flow, 'has an inner bevel 19' which forms a valve seat.

In the open side of the container 11 sits on the side remote from the closed end 12 a substantially cup-shaped lid 21, which is in the outside of his Side wall 23 has an annular groove 22. A portion of the side wall 23 between the channel 22 and the inner End 25 of the side wall 23 is located, has a lower Diameter, so that the outer surface of the section 24 of the side wall 23 at a distance from the inner surface of the container

wall 909882/0708

terwand is when the cover 21 is inserted.

The lid 21 has a circumferential edge 28 of his outer surface 29 faces upwards. A middle section 31 of the lid 21 has a flat surface 32, which in a plane that extends beyond the plane of the upper side 33 of the edge 28 and the surface of the Beckeis 21 has a slope 34- that from the foot of the edge 28 runs to the circumference of the central section 31.

A deformable partition is arranged in the container 11, which in the exemplary embodiment has the shape of an elongated bladder 35 made of rubber or of a similar material exists that has similar properties. The bladder 35 has a closed end 36, and the open one Side of the bladder has two spaced apart, inwardly protruding beads 37 and 38.

The bead 37 is housed in the annular groove 22 and the bead 38 lies below the inner end 35 the side wall 23 of the deodorant 21, *

In the installed state, when the lid 21 is inserted in the container 11, the bead 37 is compressed in the channel 22 so that a seal against pressure medium 909882/0708

medium is given. The bead 38 is then under the interior Linde 25 of the side wall 23 held, and a section 30 of the bladder wall, which lies between the "bulges 37 and 38", is under tension.

To hold the lid 21 in the container 11 is the hand 40 of the open side of the container 11 is bent inward, so that it extends over the top 33 of the circumferential edge 28 of the lid, j leads the inner edge 39 of the rim 40 the container is then down in an annular shape Recess 41 bent over by the bevel 'J4 of the Outer surface of the lid is determined.

At the middle section 31 of the lid 21 is with the help of Screws 42 a disk 43 is attached, the circumferential edge 44 of which on the edge 40 of the open side of the container 11 rests such that the top 33 of the rim 28 of the lid against the bottom of the rim 40 of the container is pulled.

The bladder 35 has (Fig.l) a substantially frustoconical Cross-section, with its side wall 45 in the vicinity of the bead 38 has a larger diameter than at the closed end 36 of the bladder. The bladder 35 can be filled with a pressurized gas via an inlet 48

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■ "loaded'be η, - which is defined by an axial bore, which through the central portion 31 of the lid 21 and leads through a central projection 49 which protrudes from the underside of the cover 21 downwards. The budget 49 has a corresponding air inlet valve 51, which by the Disk 43 is covered.

On the closed end 36 of the bladder 35 is seated a valve member 52 which has the form of a hollow knob, and Favor £ terv, ^r else made of thin sheet steel or sheet aluminum is formed. The valve member 52 has an essentially truncated cone cross-section, the smaller diameter of the truncated cone, ie the tip of the valve member, having a guide hole 53. The open side of the valve member 52 has an inwardly projecting ledge 54, polygons forming the top of the valve member, and the inner edge 55 of the ledge 54 forms an opening which is axially in line with the guide hole 53.

The side wall 56 of the valve member 52 moves in Operation against the valve seat, i.e. the bevel 19, thus expelling the bladder through the bore 18 is prevented.

An outer end 61 of the bore 18 of the socket 13 (Fig _o 2) has an internal thread, into which an with an external

909882/0708 6AD

winds

Winding end of a .Hippeis 62 is screwed. The nipple 62 has a protruding annular flange 63 • its outer end, which presses against the outer end 64 ■ of the socket 13, causing an inward movement of the hipster 62 is limited. At the foot end of the nipple 62 an annular channel 65 is arranged in which an annular seal is housed between the Y / and the channel 65 and a chamfered inside 67 of the bore 18, which ^ is located at the outer end, is compressed when the Hippe1 62 is tightened to form a seal.

The Bo; tion 18 of the socket 13 has an annular shoulder 68. acting as a stop to limit inward movement A valve member 69 is used, the inner end 71 of the nipple 62 the outward movement of this valve member .6.9 ·

limited. . .: -.'._.

The valve member 69 is a disk made of rigid material φ (Pig.2 and 3), and it has a central passage 72 and a plurality of arcuate passages 73, guide oils through the valve member in the vicinity of its periphery 74.

The central passage 72 is axially in line with the Bore 18 of the socket 13, and the arcuate passages are in line with the inner end 71 of the nipple

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The width of the ring shoulder 68 is essentially the same the width of a section 75 of the valve member 69 »the between the outer circumference 76 of the arcuate passages and the outer circumference 74 of the valve member 69 lies »pushes the section 75 of the valve member 69 against the Jling shoulder 68, then over the arched passages 73 an unrestricted passage for alas pressure medium available.

The width of the inner end 71 of the nipple 62 It is greater than the width of the arcuate passages 73 so that, when the valve member 69 is on the inner end 71 of the ITipple 62 sits, the arcuate passages 73 closed are and a pressure medium flow only through the oil passage 72 takes place «'

The transverse unconscious area of an inner end 77 of a bore 78 of the nipple 62 is somewhat smaller than the total cross-sectional area of the arched passages 73 plus the central passage 72. (Fig. 9)

The area through the annular opening a between the inner end 71 of the nipple 62 and the Lower surface 79 of valve member 69 is created,

if

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when the valve member 69 sits on the shoulder 68, together with the area of the central passage 72 is also slightly larger than the area of the inner -indes 77 the hole 78 ».

If the Ventilened 69 is on the King Shoulder 68, it is there is an essentially unrestricted flow of pressure medium through the socket 13 into the memory and is seated the valve member 69 on the inner end 71 of the Lippels 62, there is only one pressure mix flow from the storage tank the central passage 72, and one such outwardly Pressure medium flow is therefore a fraction of the pressure medium flow flowing inwards.

The memory that has been described can be of the most varied Purposes of IT use, in which the pressure medium flow unlimited in the inward direction and the • should be restricted in the outward direction. Line especially α Their application can be seen from Fig.4.

The memory shown in FIG _e 4 is associated with a plow, which serves to draw furrow in a field box.

The plow (Figo4) has a frame 81 on which several Ploughshares 82, of which only one in the drawing

voltage 909882/070 "

nting is shown. Each ploughshare 82 is pivotable at a hinge point 83 with the underside of the frame 81 connected., The ploughshare 82 is with the help of a hydraulic Actuating device 85 in the operating position, which is seated at one end 86 on the frame 81 and its piston rod 87 is pivotable at a hinge point 88 is connected to the ploughshare 82.

.When a piston 89 of the actuating device 85 is connected to the associated piston rod pushed outwards by pressure medium via an opening 91 of the actuating device 85 trains are being carried out, the ploughshare 82 pivots in the figure seen in the general sense of the word, what through the attack of a Vorpfung's 92 "-which- is located on the upper section of the ploughshare ^ is located against a Dinteilr. Ehr: over 93 is limited.

The opening 91 is connected to the Viip ^ el 62 via a line 94 of the memory and a one-way valve 95 with a loading event il 96 connected. ·

When operating the system in accordance with Pig .. '4 and with the approved Disk 43 (FIG. 1) is the one formed by the bladder 35 ■ Chamber 60 through the opening defined by the bore 18 loaded with pressurized gas. The bladder 35 expands and fills the container 11 substantially.

That_

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The valve member 52 moves down until it opens the bevel 19 of the bushing that forms the valve seat is seated, with the result that the bore 18 is closed and expulsion the bladder prevents isto

At this point in time, the valve member 69 sits due to its own weight and because the memory is in a vertical position location is on the inner end M1 of the nipple

A pressure medium supply point for oil, the pressure of which is greater than that of the gas present in the bladder 35, acts then via the open loading valve 96 and loading the assembly, Das 01, flows via the one-way valve 95 and through the line 94 into the opening 91 of the hydraulic actuator 85, whereby the ploughshare 82 in the The figure is pivoted clockwise, this pivoting being caused by the stop of the projection 92 is limited to the adjusting screw 93. It also flows the pressurized oil through the bore 78 of the Nipple 62 and presses against the lower surface 79 of the valve member 69. Dts valve member 69 moves quickly inside, until its circumferential section 75 abuts against the annular shoulder 68.

Through this movement, which is only relatively small,

open 9 0 9 8 8 2/0708

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the arcuate passages 73 open completely and the pressurized oil essentially flows through the arcuate passages 73 without restriction and also via the central passage 72; the oil presses against the valve member 52, which is seated on the bladder 35, and it moves the valve member 52 quickly from its seat, with which a loading of the chamber 61a is possible, which is between the outer surface of the bladder 35 and the container is «

/ The bladder 35 continues to be deformed, so that d; .s in it located gas is compressed.

The memory will be loaded until the pressure is down

bo has built far that the actuator 85 is able to apply the -desired-force on the ploughshare 82 _Λ '

exercise what of the particular structure of the existing

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Ploughshare depends. * v

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is ready for use

"Will the plow, for example, with the help of a! Tractor pulled through a field, the ploughshare 82 remains due to the hydraulic actuator

exercised 909882/0708

exerted force supplied by the loaded accumulator is, in the position shown in Fig can plow in the desired manner.

Should the ploughshare hit an obstacle in the ground, for example against a boulder R, a sudden force occurs, which tends to pivot the ploughshare counterclockwise around its articulation point 83 ″ in the figure moves backwards and causes a sudden Druckmi.teletoß with the oil in the line 94. The high speed flowing oil flows through the nipple 62 of the accumulator and presses against the lower surface 79 of the Ventilfeliedes 69, whereby the valve member 69 upwards against its as The annular shoulder 68 acting on the valve seat is pressed. There is thus a substantially unrestricted flow of oil through the nipple 62 into the oil chamber 61a of the accumulator via the arcuate passages 73. The bladder 35 deforms immediately and the GhB located therein is compressed and traps the sudden shock ε-uf; the pivoting movement of the ploughshare 82 is thus possible.

If the plow is pulled further, the ploughshare 82 travels over the obstacle, and if this has happened so lets the force that moved the piston 89 backwards,

909882/0708 too

also suddenly after. So Be is now a sudden big he difference between the pressure on the inside of the accumulator and the pressure prevailing in the actuating device

Because of this pressure difference, the one on the top 99 of the valve member 69 exerted force very much

greater than that against the lower surface 79 of the valve member exerted force The valve member 69 thereby becomes extreme quickly outwards against the second inner end 71 of the nipple 62 pushed. This closes the arcuate passages 73 so that the pressure medium only passes through the relatively small central passage 72 in the line and into the opening 91 of the hydraulic actuating device 85 can flow. Due to this restriction of the pressure medium flow from the accumulator, the ' The bladder 35 located in the memory is relatively slow off, so that the valve member 52 at a distance from the bevel 19 forming the valve seat will stay.

Because the pressure medium in the hydraulic actuator 85 flows in at a relatively low speed, the piston 89 of the actuating device moves behaves with the associated piston rod- '

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slow to the outside, so that the ploughshare 82 only is relatively slowly pivoted back into its normal operating position.

This is in contrast to a system in which there is a high speed of the pressure medium flow from the memory as soon as the ploughshare 82 moves away from the Pelsblock.R and the force pressing against the ploughshare is suddenly no longer present. In such a system, the ploughshare 82 would be pushed extremely quickly into its normal operating position due to the unrestricted high speed of the pressure medium flow from the reservoir. However, due to the resistance of the arable land, and particularly if it is heavy arable land, the ploughshare 82 would not move through the arable land as quickly. The frame 81 itself would move outward, ie. be lifted up, resulting in extreme vibrations, In addition, the ploughshare would travel along the top of the ground and the uninterrupted furrow that the ploughshare is supposed to make would be interrupted. This problem is of course exacerbated when one considers that the frame 81 of the plow normally supports a large number of plowshares 82, and if one or more of the plowshares are suddenly released,

nachde m 90 9882/0 7 08

after being restrained by an obstacle. There are irregular impacts on the frame of the plow and the probability that the SGhv / enk connections and the equipment carried by the frame breaks. With the memory described, however, in which the pressure medium flow to the outside of the memory is restricted, the force exerted by the actuating device on the plow builds up extremely slowly, which means no more hard knocks of the ploughshare against the arable soil V appear. The frame of the plow is not a disturbance subject to more and the ploughshare runs into the arable soil to the desired operating position *

In the case of the memory described, the relatively little movable one Has parts and is highly unlikely to become inoperable, a substantially unrestricted flow of pressure medium into the memory is achieved and out out of the reservoir there is only a limited flow of pressurized medium available.

Claims : 909882/0708

Claims (10)

• Pat e η t a n a ν r ü c he 1) Pressure vessel with one made of rigid material Container .und a deformable partition located in the container, which separates two from one another Forms Kemmern, characterized in that a bushing leads away from the container in the axial direction, which has a valve seat at its inner end forms that the partition has a valve which moves against the valve seat during operation that in the Bush slidably seated a valve member that is moveable is between an innermost and an outermost position that the valve member has a passage that There are parts which close the passage when the valve member is in the extreme position is that an additional passage is arranged in the valve member, which is a constant connection creates by the valve member and that the additional Passage has a cross-sectional area which is smaller than that of the first passage. 2) pressure vessel according to claim 1, characterized in that the Ventilglieä is a disc made of rigid material is, 909882/0701 and that the bushing has an inside stop to restrict it the inward movement; the disc has. 3) pressure vessel according to claim 1, characterized in that the-valve member is a relatively thick disc made of rigid material and that the bushing has an inner annular shoulder against which the inner surface of the disc abuts on its periphery, whereby the inward movement of the disc is limited . 4) pressure vessel according to claim 1, characterized in that that the valve was a comparatively thick disk that the first passage is made of stiff catarial .multiple arched. Openings through the disc lead near its circumference, has that the additional passage has a central bore through the Washer, and that the socket-e has an inner ring shoulder has, against Wu lohe the inner plane of the disc strikes outside the arched vents, with which an inward movement of the disc is restricted. - 5) ..Pressure vessel according to claim 1, characterized in that that the valve gli-ed. a relatively thick slice made of stiff material is that the bushing is an inner one Annular shoulder 909882/0708 IAP ORIGINAL Has an annular shoulder against which the inner surface of the disc rests on its circumference and thus an inward movement the disc is limited to that in the outer end A nipple is attached to the bay that the inner one The end of the nipple is at a longitudinal "distance" from the annular shoulder, so that the outer surface of the disk faces the Restricting your own outward movement against the inner end of the nipple that abuts the ring shoulder so wide that there is complete freedom for the neighbors Linden the plurality of arcuate passages is given when the disc hits the ring shoulder and that the inner linden of the nipple is so wide that the adjacent ends of the polygon x 1 of arcuate Passages are closed when the disc is against it bumps. . 6) pressure vessel according to claim 5, characterized in, that the area defined by the inner end of the bore of the nipple is substantially equal to that annular area defined by the distance between the lower surface of the washer and the inner end of the: nipple is determined when the washer is against the Ring shoulder lays, and that this area also essentially is equal to the cross-sectional area of the plurality of arcuate passages. 909882/07 08 6AD OHiGiNAL 7) pressure vessel according to claim 1, characterized in that that the valves ed a relatively thick one Washer made of stiff hat-'rial is that the multitude Clay passages have several arc-shaped openings, which pass through the disc in the vicinity of theirs Initially, the additional passage leads to a M ^ ttelbohrung through the disc is that the socket ■ has an inner ring shoulder against which the Inner surface of the disc lays outside the arcuate passages on its periphery, causing inward movement the disc is limited to a nipple fixed in the outer end of the socket and in the "Longitudinal distance from the ring shoulder is kept that the outer surface of the disc pushes against the inner end of the nipple, causing an outward movement the disc is limited that the width of the ring shoulder is substantially equal to the width of the annular area of the disc that is outside the annular Passages lies, and that the width of the inner end of the nipple is greater than the width of the ■ annular Passages ο 8) pressure vessel according to claim 1, characterized in that ■■ ".. that the diameter of the wall section of the socket bore, the one between the ring shoulder and the - - ^: ren ^: 909 882/07 0 8 at the end of the hip, is only slightly larger than the diameter of the disk, making a sliding fit is created with little play, and that the Thickness of the slice the greater portion of the length of the wall section is. 9) pressure vessel according to claim 1, characterized in that that on the frame of a plow, on which a ploughshare w is attached, parts are attached by means of which the ploughshare is pivotally mounted on the frame of the plow, that a hydraulic actuating device is pivotally attached at one end to the frame of the plow, that the actuating device; _o Lben a K and a Kolbenstsjige has the cn their one Em de is secured to the piston and at its other end pivotally connected to the plow, whereby the plow can be rotated, and that the Betätigungsvor- φ direction has an opening and parts through which the opening is connected to the oil outlet of the pressure accumulator, 10) pressure vessel according to claim 1, characterized in that that there are devices for loading the reservoir with pressurized liquid. 909882/0708 -owe »** - Lee on the back