DK155851B - TURN VALVE OR CLOCK VALVE - Google Patents

Description

in

DK 155851 B

The present invention relates to a rotary damper or flap valve of the kind set forth in the preamble of claim 1.

The invention thus relates to so-called pivot valves or flap valves, in which a valve body is caused to sealingly cooperate with the valve bed by oscillation or axis in all displacement and thus closes for flow, but it can also advantageously be used to produce an ood seal at most valve-types.

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In the case of known valves, the valve body is moved in a torque such that its peripheral portion abuts against a valve seat and is strongly pressed against it. One of the cooperating sealing surfaces may have a sealing coating of a rubber-like or other resilient material. Known rotary dampers 15 and folding valves, respectively, have the disadvantage that the valve does not hold tightly if the seat is damaged in some way. Another disadvantage is that the closing device of such valves becomes heavy and complicated due to the required pressure.

It is known to produce valves of the customs valve type for improved sealing by lubricating the seat surfaces. However, these require very precise machining. However, since the surfaces themselves must be large, such valves become space-consuming, heavy and expensive.

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It is also known to design one seat by damper valves as a diaphragm which is pressed against the other seat by means of pressure medium. Such a membrane is always difficult to place, therefore the valve becomes expensive. The diaphragm is also one. 3q sensitive simplicity of the valve which can be easily damaged.

Finally, it is also known to provide one seat with a hollow ring of rubber or similar material which is pressed against the other seat by means of a pressure medium. Such a hollow rubber ring is also expensive and must be regarded as a simplicity of the valve which can be easily damaged.

It is the object of the present invention to avoid the aforesaid disadvantages and to provide a single designed, space saving and safe sealing valve.

DK 155851 B

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This object is met by the fact that the rotary damper mentioned in the introduction and the valve according to the invention, as mentioned in the characterizing part of claim 1, is characterized by the invention.

The sealing effect of the damper or flap valve is improved by further compressing the seats to which grease or a corresponding sealing agent is applied, either through double eccentric bearing of the damper or flap respectively, or by pressing some medium into the cavity behind the sliding sealing surface for closure. position to reduce the gap between the seat surfaces.

The seats may thereby be brought into contact with each other, even in such places where a gap is formed between the seats, and with resultant sealing effect.

15

The valve according to the invention can be combined with several details which further improve the construction and function. With the aid of the characterizing part of claim 2, the advantage is obtained that the sealing means is prevented from being carried away, since by means of the grooves a form of a mechanically retained body of the sealant is obtained. With the aid of the characterizing part of claim 3, it is ensured that for sealing the valve in a simple and effective manner, sealant can be drained even from the grooves.

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As stated in the characterizing part of claim 4, it is ensured that the eggs or such sharp edges can cut off foreign particles that would otherwise damage the seats and impair the seal. Such eggs are simple and inexpensive to produce.

30 On both sides of the seats, furthermore, at desired distances, fins may also be placed to guide the second seat into its proper position. Slots are placed on the seat of the housing and / or the damper, respectively, to control the grease or a corresponding sealing medium.

35

Preferred embodiments of the rotary damper and the flap valve according to the invention are further described below on the basis of the drawing. On this one shows 3

DK 155851 B

FIG. 1 is a cut-away portion of a valve designed to inject grease or similar sealing medium between the sealing surfaces, both of which have flat abutment surfaces; 2 is a cut-away portion of a valve according to the invention, wherein one seat has a flushing slot 1 in a cavity 1, and

FIG. 3 is a cut-away portion of a valve having a further embodiment of the edge of the seat formed as an egg.

10 Only the essential details for clarifying the function are included in the drawing.

One in FIG. 1, the valve housing shown has a sealing surface 2 consisting of the same material as the housing 1.

15 A shaft 3 is mounted in the valve body and this carries the valve body 4, in this case a rotary damper. The bearing can be double or single centered in sk. Wait 11 squirrel 4 can be turned to the closed and open position by means not shown.

20 On the valve body 4 serving as a closing device, the seat 5 of the damper is arranged. Grease or similar sealing medium 6 is applied between the valve body seat 2 and the damper seat 5. The medium is applied through holes 7 in the valve housing with nipples and / or 25 valves 8.

In principle, the valve is closed as follows. The valve body 4 is turned by the shaft 3 to the closed position, whereby the seats 2 and 5 engage sealingly. Then grease or sealing medium 6 is applied between the seats through the nipples and / or valves 8.

In FIG. 2 is shown in principle how in one seat, in this case the seat of the housing according to the invention, a cavity 21 may be formed behind the sealing surface of the valve housing, in which cavity 21 the pressure medium can be pressed through a valve on the valve housing. Hereby, the sealing surface portion 22 will be pressed outwards, thereby reducing the gap between the sealing surfaces in the vent.

Claims (4)

A rotary damper or flap valve 1, preferably at high pressure and including a valve housing (1), a rotatable disc-shaped valve body (4), a valve body actuator and at least one seat forming one sealing surface and calculated to cooperate with at least one sealing element forming the second sealing surface (5), the sealing surface of the so-called web-shaped valve body having a small extent in the sealing direction, and furthermore at valve housing The -3Q set and / or venti 11 squirrel (1 and 4, respectively) are arranged at least one channel (7, 8) adjacent the relevant sealing surface, through which grease or similar sealing between the sealing surfaces improves, known per se (5). ) can be inserted into the gap formed between the sealing surfaces in their interlocking positions, characterized in that a portion (22) of the one sealing surface is disposed displaceable from the plane of the sealing surface relative to the sealing surface of the sealing surface. further, that displacement of the sealing portion (22) DK 155851 B against the opposing sealing surface thereof is arranged to be produced by means of a displaceable surface portion (22) insertable in a cavity (21) arranged at the rear of said f the closed position of the valve is completely covered by the opposing sealing surface thereby cooperating, and the channel for supply of sealing enhancing agent opens such that said means will at least fill the pressure side of the sliding surface portion. Turning damper or flap valve according to claim 1, characterized in that at least one sealing surface has grooves (19) which are formed so as to form a retained body of the sealing means (6). Rotary damper or flap valve according to claim 2, characterized in that the groove (19) can also be connected to a drain channel provided with a valve. Rotary damper or flap valve according to any one of the preceding claims, characterized in that the vent in the squirrel 20 (4) has sharp edges, or edges (17), just as with this cooperating seat or equivalent at the valve housing (1). 25 30 35