DD235310B1 - Gas valve for hydropneumatic pressure memory - Google Patents

Gas valve for hydropneumatic pressure memory Download PDF

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Publication number
DD235310B1
DD235310B1 DD27414385A DD27414385A DD235310B1 DD 235310 B1 DD235310 B1 DD 235310B1 DD 27414385 A DD27414385 A DD 27414385A DD 27414385 A DD27414385 A DD 27414385A DD 235310 B1 DD235310 B1 DD 235310B1
Authority
DD
German Democratic Republic
Prior art keywords
valve body
gas valve
sealing element
characterized
gas
Prior art date
Application number
DD27414385A
Other languages
German (de)
Other versions
DD235310A1 (en
Inventor
Manfred Gruendig
Rolf Liebers
Original Assignee
Sachsenhydraulik Gmbh
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 Sachsenhydraulik Gmbh filed Critical Sachsenhydraulik Gmbh
Priority to DD27414385A priority Critical patent/DD235310B1/en
Publication of DD235310A1 publication Critical patent/DD235310A1/en
Publication of DD235310B1 publication Critical patent/DD235310B1/en

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Description

For this 3 pages drawings

Field of application of the invention

The invention relates to a gas valve for hydropneumatic pressure accumulator with elastic partition, which is preferably arranged in a space of the pressure vessel final lid with a spring-loaded valve body, which is flowed around in the open position of the gas valve guideless from the medium and receives a sealing element.

Characteristic of the known state of the art

Hydrostatic pressure accumulator with formed as a bubble or membrane elastic partition wall are known, wherein the gas-side filling of the pressure accumulator in the housing or in a lid of the same a gas valve is arranged (DE-OS 2,942,584, DE-OS 2,948,588, DE-OS 3.125. 497).

Such gas valves are designed as so-called "Schrader valves" as they are also used as a tire inflation valve.These gas valves acting as a check valve have an outer sealing cone which seals against the receiving opening of the screwed-in valve insert, while a second inner seal forms the check valve inner seal by gas filling pressure or mechanical actuation of a valve stem, which is held by spring force in the closed position and an elastic sealing element on an analog sealing surface for conditioning (DD-PS 7.335, DD-PS 28.986, DE-PS 1,019,193).

Also known is a pressure accumulator with elastic partition whose gas channel has a sealing member designed as a ball, which is pressed after the gas-side filling in the gas channel and this tightly / tightly seals. This filling to be realized without gas valve does not allow refilling of the accumulator (DD-PS 121.830, DD-PS 126.955).

Furthermore, a pressure accumulator designed as a bubble elastic partition is known, which has a separate valve assembly for gas-side filling. This gas valve is perpendicular to the longitudinal axis of the memory and rotatably mounted around this (DD-PS 123.901).

Through a bubble accumulator, a gas valve has been known, which consists of a spherical closure member, a rubber molded piece and a holding plate. Trained as a steel ball closure member sets in rest position against serving as a valve seat opening of the gas inlet opening in the pressure vessel and closes this opening directly from the internal gas pressure (DE-AS 1,290,393).

For an elastic bladder accumulator, an out of center axis, i. laterally arranged gas inlet valve, which is arranged in a region of the container wall always covered by the bubble. A screwable valve insert has an inclined shoulder and lines for the gas passage, while a threaded plug secures the valve core (DE-AS 2,129,083).

Finally, a gas inlet valve for pressure accumulator has become known (OE-OS 2,537,963), which is introduced into the coaxial opening of a lid. The screwed and sealed against the lid gas valve in this case has a spring-loaded valve stem, which carries at its inner end a disc-shaped elastic closure member. Said closure piece cooperates with a conical valve seat of the screwed valve body, wherein a spring acting on the closure piece ensures the closure of the gas valve. By means of a sealed threaded cap, the inlet opening of the gas channel fixed is closed after the filling process. In addition, a designed as a check valve spring valve is known (DE-GM 1.816.565), which has a flow-around guideless valve body. This spring-loaded valve body ensures under certain conditions the formation of an annular gap between itself and the valve housing and thus in the open position the passage of the medium, which operates in the low-pressure region. When using this check valve under high pressure, the guideless closure piece shows a completely uncontrolled behavior, which manifests itself in flutter, buckling and closing the through hole. Thus, the use of such a trained check valve for reasons of functional uncertainty in the high pressure range, as well as for the gas side hydropneumatic pressure accumulator, not possible.

At the so-called Schrader valves used in pressure accumulators, an increased surface pressure arises at higher pressures, which leads to damage to the seal and thus to failure. Repairs to this valve with two sealing points are not possible.

The special versions for pressure accumulator gas valves continue to require high production costs, since many items and, for example, rubber-metal compounds are to be realized. Certain versions do not guarantee refilling of the memory, since the valves are pressed. Furthermore, due to a complicated assembly a replacement only from the manufacturer possible. For one thing, certain valves are not applicable to bladder accumulators because the metal occluders are obscured by the accumulator membrane. On the other hand, certain valves can be unscrewed under full gas pressure when necessary. In addition, the too small gap in the valve to flow past the gas has proved to be disadvantageous. When using a rubber disadvantage no favorable centering of the valve body is guaranteed in known constructions.

Object of the invention

The invention has set itself the goal of creating a gas valve for hydropneumatic pressure accumulator, which enables a rational production with a simple structural design and requires a minimum of care with high reliability and thus is service-friendly.

Explanation of the essence of the invention

The object of the invention is to provide a gas valve for hydropneumatic pressure accumulator, which ensures a short filling or emptying of the memory and a secure seal even at high pressures due to large passage cross-sections, for reasons of rational production only one sealing point for the valve body should be present. According to the invention, this object is achieved by the solution paths shown in the claims, wherein the dependent claims show possible embodiments of the gas valve.

Advantageously, the described paragraph 16 of the invention serves to guide the valve body 10, while the cone 21 forms the centering of this valve body 10. This design of the valve body 10 only a small guide accuracy is required and ensures a very simple installation of the valve. For secure sealing of the valve also only one sealing point / sealing surface 20 is required, while the formation of the annular gap 24 allows a short-term filling or emptying of the pressure accumulator. By the pressure spring 12 used, this annular gap 24 is not reduced and thus the permeability for the medium is not affected. When changing a worn sealing element 18, 26 for this gas valve accident risk is completely excluded, since this can only be done in a pressureless state. Thus, each user / holder of accumulators is capable of this sealing element 18,26, z. B. change when replacing the rubber bubble / partition 2 itself, without obtaining a corresponding spare part from the manufacturer.

embodiment

The invention is explained in more detail below with reference to exemplary embodiments, wherein the drawings represent the following:

Fig. 1: the longitudinal section of a hydrostatic pressure accumulator

Fig. 2: the enlarged sectional view of a gas valve in the closed state with trained as a circular ring sealing element

FIG. 3: the gas valve according to FIG. 2 in the opened state FIG. 4: the opened gas valve according to FIG. 3 with slightly tilted valve body FIG. 5: a further embodiment variant of the gas valve with disc-shaped sealing element.

In Fig. 1, an accumulator is shown, the pressure vessel 1 has a designed as a bubble elastic partition 2. This partition 2 is fixed in an upper coaxial opening 3 of the pressure vessel 1 by a reinforced edge portion 4 of the partition wall 2 is pressed by a cover 5 fixed against a bead 6 of the pressure vessel 1. In this case, the pressing of the lid 5 by means of threaded ring 7. For filling, emptying and testing of the pressure accumulator or designed as a bubble partition 2 with gas in a space 8 of the lid 5, a gas valve 9 is formed (Figure 2), which cooperate by interaction the following components are realized .:

In the cylindrical space 8 a mutually remote, also cylindrical valve body 10 is arranged, the largest diameter d 1 is preferably smaller by 0.6 mm than the diameter d 2 of him receiving space 8. At an inwardly directed paragraph 11 of the valve body 10 engages positively a compression spring 12, which is supported on a space 8 final screw 13. This screw 13 is provided with a central passage opening 14 and is flush with an inner side 15 of the lid 5 from. This prevents damage to the elastic partition wall 2.

An outwardly facing cylindrical shoulder 16 of the valve body 10 forms a shoulder 17 for the frontal contact of a sealing element 18, which is designed as a round ring. This sealing element 18 engages around the shoulder 16 of the valve body in a form-fitting manner and, in its rest position, approximately corresponds to the diameter d of this valve body 10.

The outer shoulder 16 engages in the position shown (FIG. 2) in an analog cylindrical opening 19 of the lid 5 a. This paragraph 16 has opposite opening 19 only a small amount of play, whereby the valve body 10 is exactly centered.

Due to this small game damage to the sealing element 18 is also avoided. Said game between the paragraph 16 and the opening 19 is dimensioned so that the guidance of the paragraph 16 is guaranteed and this can slide smoothly.

The fit used for this purpose is preferably H 8 to f7. Due to the difference in diameter between the cylindrical space 8 and the opening 19 creates an annular sealing surface 20, which serves the abutment of the sealing element. The length of the outer shoulder 16 is sized to provide a corresponding minimum guide in the opening 19, e.g.

up to 2 mm, guaranteed and tilting of the same in the closed position is excluded. This results in a parallel gap-free contact of the sealing element 18 on the sealing surface 20th

Said cylindrical shoulder 16 then merges into an acute-angled cone 21, which is followed by an end piece 22 serving to actuate the valve body 10. When filling the pressure accumulator with gas, a filling device, not shown, connected in a known manner to the opening 19 and the end portion 22 of the valve body 10 in the opening direction against the force of the compression spring 12 is actuated (see Fig. 3).

By means of an annular passage 23 which arises in the region of the cone 21 and due to the sealing element 18 lifted off the sealing surface 20, the gas passes from the opening 19 into the upper part of the space 8. From here the gas under high pressure reaches a sufficiently large gas Annular gap 24, which is present between the valve body 10 and the wall of the space 8 (about 0.3 to 0.5 mm), in the lower part of this space 8 and from here via the passage opening 14 in the region of the elastic partition wall second Once the operation of the end piece 22 is released, the compression spring 12 moves the valve body 10 in the closing direction, whereby the sealing element 18 comes to rest on the sealing surface 20 of the lid 5. The cone 21 causes in coordination / connection with an annular guide edge at the inner end of the sealing surface 20 an exact centering of the shoulder 16 with respect to the receiving opening 19th

A slightly tilted by lateral forces valve body 10 (see Figure 4) is centered by means of this cone 21 when returned to the opening 19 at any time properly and brought into exact axial position.

In the embodiment according to FIGS. 2, 3 and 4, when using the sealing element 18 designed as a round ring, a radius is attached to the shoulder 17 at the transition of the shoulder 16, which radius is adapted to the shape of the ringing ring. In a further embodiment according to FIG. 5, a sealing element 26 designed as a disk is arranged on the valve body 10. The paragraph 16 in this case has an annular groove 27, in which the sealing element 26 engages and thus secured in a form-fitting manner.

5 also shows the possibility of arranging a plurality of passage openings 28 in the screw piece 13, the pitch circle of which runs outside the diameter of the shoulder 11.

Finally, it should be noted that instead of the sealing elements 18,26 a hard seal is realized, which requires a corresponding design of the shoulder 17 of the valve body 10 and the opposite sealing surface 20 in the lid 5.

Claims (7)

1. Gas valve for hydropneumatic accumulator with particular elastic partition, which is preferably arranged in a space of the pressure vessel final lid with a spring-loaded valve body, which is flowed around in the open position of the gas valve guideless medium and receives a sealing element, characterized in that the valve body ( 10) has a cylindrical shoulder (16) with a subsequent cone (21) and end piece (22), furthermore a shoulder (17) receives a sealing element (18,26) so that this sealing element (18,26) in the closed position a sealing surface (20) is applied and the diameter (d ^ of the valve body (10) is smaller than the diameter (d 2 ) of the bore of the receiving space (8).
2. Gas valve according to claim 1, characterized in that on the shoulder (17) of the valve body (10) arranged sealing element (18,26) is designed as a round ring or as a disk of plastic-elastic material.
3. Gas valve according to claim 1, characterized in that the acute-angled cone (21) of the valve body (10) is followed by a cylindrical end piece (22).
4. Gas valve according to claim 1, characterized in that the valve body (10) has an inner shoulder (11) which serves the positive guidance of a compression spring (12) which is supported on a space (8) final screw (13) ,
5. Gas valve according to claim 1 and 4, characterized in that the screw piece (13) has at least one passage opening (14,28) for connecting the space (8) with the interior of the pressure vessel (1).
6. Gas valve according to claim 1, characterized in that the annular sealing surface (20) of the space (8) at right angles or at most up to 5 degrees from the right angle deviating from the longitudinal axis of the space (8) is formed.
7. Gas valve according to claim 2, characterized in that when using a disk designed as a sealing element (26) of the shoulder (16) of the valve body (10) has an annular groove (27) for positive locking of this sealing element (26).
DD27414385A 1985-03-15 1985-03-15 Gas valve for hydropneumatic pressure memory DD235310B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD27414385A DD235310B1 (en) 1985-03-15 1985-03-15 Gas valve for hydropneumatic pressure memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD27414385A DD235310B1 (en) 1985-03-15 1985-03-15 Gas valve for hydropneumatic pressure memory

Publications (2)

Publication Number Publication Date
DD235310A1 DD235310A1 (en) 1986-04-30
DD235310B1 true DD235310B1 (en) 1991-08-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DD27414385A DD235310B1 (en) 1985-03-15 1985-03-15 Gas valve for hydropneumatic pressure memory

Country Status (1)

Country Link
DD (1) DD235310B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6409487B1 (en) * 2000-09-12 2002-06-25 Dc Shoes, Inc. Shoe with inflatable bladder and secure deflation valve

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DD235310A1 (en) 1986-04-30

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