DE1947486C3 - Valve - Google Patents

Description

State of the art

Through the Df- (Im 18 75 816 is; a as a connector pressure and vent valve determined for the rubber ball of sphygmomanometers. To the Ventilation, a ring-shaped component is twisted to a greater or lesser extent and thereby at the boundary zone / wipe the inner Ventiltcil and the ring, the hole is more or less released or covered. So it is only a very small angle of rotation between complete closure and complete release of the bore available. In practical operation, a device of this type does not provide any real adjustment the outflowing air.

task

The invention specified in claim I is based on the consideration that with vent valves for Sphygmomanometers and the like a much more precise regulation, so a real fine control for the escaping air is desirable and it has the task posed to enable a much finer regulation with simple constructive means.

advantages

With the vent valve according to the invention for blood pressure monitors, the possibility is created by simply turning the adjusting ring of an annular valve part a relatively large one Twist angle between complete closure and complete release of the outflow channel achieve. A real fine control is thus achieved, without using the otherwise for such Purposes commonly used needle valves, soft have the disadvantages that usually only one there is a very small contact area between the needle and the valve seat and the resulting relatively high surface pressures, signs of wear and / or deformations occur. This degrades the fine adjustment of these needle valves due to use and wear. Since the usual needle valves require two valve parts that match one another, they must be manufactured carefully required and the valves are relatively expensive. By combining the longitudinal shift and the Rotary movement and the stresses that occur in the process make it necessary to keep the valves off permanent and consequently to manufacture relatively expensive materials.

Advantageous further developments of the invention are described in the subclaims.

Presentation of the invention

In the following, the invention is explained in connection with the illustrative embodiment. characters explained. Corresponding parts are provided with the same reference numbers in all figures. It shows in perspective

1 shows the individual parts of a sphygmomanom valve,

Fi g. 2 on a greatly enlarged scale a Konstrukii vcs Detail of the valve opening and a valve channel,

3 shows, on an enlarged scale, the view of the cap with the suction device for the closure sleeve,

4 shows, on an enlarged scale, the view of Sleeve with inwardly directed locking device to optionally cover the valve opening and the Canal,

F i g. 5 is a view of the assembled valve.

As can be seen from FIGS. I and 5, the inner Vcntillcil 10 of the Sphygmomanomctcrventils an axial Durchlaükanul II for the flowing Medium. In the enlarged part 12 of the valve part 10 there is a not shown in the figure usual Rückstauvcntil that a flow only in ascending Direction (based on the representation of Fig. I) allows. The ends 14 and 16 of the valve part 10 are for the tight connection of (not shown) pressure hoses designed in the slim cylindrical part of the valve part 10 is a recess 19 for a Provided set screw which holds the assembled valve parts and will be mentioned later.

The device 20 for the fine regulation of the flow has a valve opening 2 !, which through the Wall of the slender cylindrical part 18 extends to the axial passage channel 11. The valve channels 22 extend from the opening 21 to both sides along part of the circumference of the cylindrical jacket surface.

The sleeve 30 has, as can be seen from Fig. 1 and Fig. 4, an inwardly directed closure part 32, which extends on the inside from the lower end of the sleeve to just below the upper end. One of the Sleeve inwardly directed Stüizrippe 34 serves to around the closure part 32 in close contact with the cylindrical surface of the slender cylindrical To hold part 18 and thereby seal the valve opening 21 and the valve channels 22.

The limiting devices 36 and 36 'form stops which prevent the rotation of the'; '. Jffe 30 on the slim cylindrical part 18 begrer.iep. The trough-shaped Depressions on the outer surface of the sleeve 30 allow a certain elastic change in shape the sleeve and allow it to deviate slightly from the circular cross-section during installation and afterwards the installation, the locking device 32 perpendicular to the surface of the slender cylindrical part 18 is pressed to ensure a tight seal on the sealing surfaces.

The cap 40 has an adjusting screw 42 which is inserted into the recess 19 of the slender cylindrical part can be screwed in and after assembly in this position, the sleeve 30 and the cap 40 on the Valve body 10 holds. On the underside of the cap 40 there is a circular ring sector-shaped nose 44, which cooperates with the limiting devices 36 and 36 'to thereby reduce the rotational movement of the To limit sleeve 30 relative to the cap attached to the valve body 10.

When the individual parts of the sphygmomanometer valve according to the in F i g. I put together in the manner indicated, then touch the limiting devices 36 the end faces 46 of the nose 44. In this setting, the opening 2t and the Valve channels 22 completely covered by the closure device 32 and, as a result, the Blocked flow. If the sleeve 30 is rotated in the direction of arrow 39, the locking device from the far right end of the channel 22. If the sleeve 30 is in the direction of arrow 39 rotated further so that finally the limiting device 36 'rests against the end face 46', then the valve opening 21 fully released and the connection from the passage 11 to the longitudinal channel Sleeve 30 is free. In Fi g. 2 is the one from the valve opening 21, a uniform reduction in the cross section of the valve channels 22 can be seen in both directions.

When the valve is used in a sphygmomanometer, came. a standard rubber ball pump the end 14 of the valve, which is appropriately designed for this purpose, is used. The device for measuring and testing the Blood pressure is connected to the end 16, which is likewise designed accordingly. The sleeve 30 is turned against the direction of arrow 39 to its left setting Backflow valve in the upward direction (based on the in Fig. I position shown) pumped. After reading the maximum blood pressure value can increase the speed of pressure decrease by rotating eggs accordingly

Sleeve 30 can be adjusted in the direction of arrow 39.

The valve designed according to the invention is much easier to operate than the needle valves, which are usually connected to sphygmomanometers. When the valve according to the invention exist neither a risk of damage to the final components nor difficulties with Relief of pressure, as often occurs with needle valves. The known needle valves can If the needles are screwed in tightly when the flow is closed, damage can occur and it is difficult to open the valves smoothly. The valves of the invention have fixed stops that are not in the flow path, cannot cause damage and the valves can be opened easily guarantee. In addition, the crfindungsgemäö trained valves self-cleaning; Dirt gets off the surface of the cylindrical part 18 through the foremost end of the closing device 33 wiped away when the sleeve 30 in the Verschltißstel Inns is turned.

1 sheet of drawings

Claims (12)

Patent claims: 1. Vent valve for blood pressure monitor, consisting of of a first and a second concentrically arranged valve part and an in a valve part! built-in backflow valve, characterized in that the first Valve part (10) on the contact surface with the second valve part one with the one connected to it Line communicating opening (21) and that one of the two valve parts has at least one in the Contact surface lying, transversely to the direction of flow through the first and second valve part running channel (22) with this in the longitudinal direction Channel has decreasing cross-section, which the line contained in the other valve part (30) optionally adjustable with the opening (21) connects, and that both valve parts in the longitudinal direction this channel (22) can be adjusted to be movable relative to one another are. 2. Valve according to claim 1, characterized by an axial channel (11) in the first valve part (10). 3. Valve according to claim I or 2, characterized in that the second valve part (30) has a longitudinally extending, the opening (21) optionally closing closure part (32) and a preferably rib-shaped, projecting support body (34) lying opposite it. has, which is dimensioned so that the closure part is pressed against the other valve part (10) and that between Versrhlußte; and a supporting body is arranged in a channel extending in the longitudinal direction of the second valve part (30) . 4. Valve according to claim I or 3, characterized in that the two are concentric to one another arranged Vcntilleile (10, 10) as a hollow cylinder are executed and the Stülzkörper (34) and the wear part (32) with the outer Valve piece form a piece connected in the material. 5. Valve according to claim 1 or 3, characterized in that stops (36, 36 ') angeordnei which, in cooperation with at least one nose (44) located on the other valve part limit the relative rotation of the two valve parts on both sides. 6. Valve according to claim I or 5, characterized by such an arrangement of the stops (36, 36 ') that in an end position determined by them of the valve, the opening (21) and channels (22, 22 ') communicating with it from the closure part (32) of the other valve part (30) are completely covered and in the other end position the Opening (21) and at least essential parts of the channels (22, 22 '), preferably the entire surface these channels are not covered by the closure part, and these channels with the one in the second valve part (30) communicate contained line. 7. Valve according to claim I or 6, characterized in that to limit the rotary movement a ring section-shaped recess is provided at one end face of the one valve part, and a projecting part (44) firmly connected to the other valve piece (10) into this recess protrudes. 8. Valve according to claim I oiler 7. characterized in that near one end of the two outer valves designed as a sleeve (30) and extending inward from the end face There are stops (36, 36 ') to limit the rotary movement. 9. Valve according to claim 1 or 8, characterized by a third annular component (40), which is attached concentrically to the first valve part on this and one in the longitudinal direction in the interior of a recess of the second valve part extending protruding part (44), which in Cooperation with stops (36, 36 ') present on this second valve part, the relative Rotation of the two valve parts limited on both sides. 10. Valve according to claim 1 or 3, characterized in that the outer valve part in particular is designed to be elastically deformable in the area of the closure part. 11. Valve according to claim 1 or 8, characterized in that the outer Veniilteil a with a groove-like Has indented surface. 12. Valve according to one of claims 1 to II, characterized in that it is designed as a sphygmomanometer and consists of an elongated, annular, open at both ends first valve body (10) with a connection to a Pressure supply device at one end and a connection to a blood pressure test and measurement device at the other end and one located inside, a return flow to the pressure supply device preventing backflow valve and one located downstream of the backflow valve in the direction of flow opening (21) and at least one located on the outside, starting from this opening, tapering channel (22) and an annular, designed as a sleeve (30) / widen Valve body consists of an inwardly projecting closure device (32) for the opening (21) and the channel (22) as well as a Jor closure device opposite, inwardly projecting support device (34), and that laterally in addition to the sleeve, coaxial with it, on the first valve body (10), an annular holding device (40) is attached, which has a nose (44) which in a corresponding lateral recess of the second valve body (30) protrudes and in cooperation with stops located there (36, 36 ') the rotary movement of the second valve body (30) relative to the first valve body (10) limited.