KR0153507B1 - Measuring and regulating valve - Google Patents

Abstract

The measuring and adjusting valve assembly of the present invention comprises a butterfly valve and a measuring flange.

The measuring flange 2 is located in the upper stream of the butterfly valve. The distance A between this valve and the measuring flange 2 is at least 0.6 times the nominal passage diameter.

The assembly is adjustable stop 26, which is connected to the actuating means 4 and in contact with the cap of the sleeve 43 connected to the valve shaft 15 so that the maximum opening angle of the butterfly valve can be limited in a repeatable manner. It includes a control box (3) having.

Description

Measurement and Control Valve

1 is a perspective view of a measuring and regulating valve.

2 is an axial partial longitudinal cross-sectional view of the valve of FIG.

3 is a rear view of FIG. 1 showing a cross section below the central axis at the position of the measuring flange.

4 is an enlarged cross-sectional view of the control box according to the line IV-IV of FIG.

5 is a diagram showing an example of a chart on a control box.

The present invention relates to a measuring and regulating valve, in particular having a measuring flange with two connections for a pressure gauge and located in an upstream stream of the actual stop valve which is movable by the actuating means to the open and closed and intermediate positions. A measurement and regulating valve for use in a heating system in a large building.

Known measuring and regulating valves of this type are usually equipped with plugs whose axes form an angle of about 60 degrees with respect to the flow direction and are therefore very long, for example 370 mm for a passage of 100 mm.

The plug rotates from the open position to the closed position and vice versa via the spindle and the knob.

The installation of such a system requires that all resistances on multiple lines be balanced to ensure that the minimum required flow rate is obtained on all lines.

In large buildings, the main lines usually have several auxiliary lines each.

In this case, adjustments are made in stages, ie first in the auxiliary line and then in the main line, and then by the pump for the entire flow.

Measurement and adjustment units based on butterfly valves were considered less serious than other types of good adjustment principles using such as plug valves.

The combination of the measuring flange and the butterfly valve results in inadequate measurement and adjustment characteristics, ie butterfly valves with asymmetrically generated pressure when partly in the open position, resulting in measurement inaccuracy, low accuracy and small adjustment ranges. It is known that because of its short length, it is located too close to the measuring flange, so that it is impossible to take an accurate measuring value from the measuring flange.

Nevertheless, the known measuring and regulating valves have the drawback that they can be removed somewhat easily by simply using a butterfly valve.

The main drawback is that known valves require very precise operation in order to maintain an accurate adjustment, all information about the state setting must be read from the chart, and the adjustment can be carried out easily and effectively only if two people are involved. .

Butterfly valves used for this purpose have very good results when the distance between this valve and the measuring flange is at least 0.6 times the nominal passage, and the control box on the valve limits the maximum opening angle of the butterfly valve in a precisely repeatable manner. And an adjustable stop provided on the valve shaft and brought into contact with the cap on the sleeve of the actuating means having the indicator.

The spacing for a nominal passage of 100 mm is up to 60 mm since the outer length is 120 mm.

This is about 250mm smaller than the plug-type measuring and regulating valve.

The maximum opening angle of the butterfly valve is well adjustable in the range between about 75 degrees and 20 degrees, and the position of 0 degrees in the closed position with the measuring and regulating valve of the present invention is suitable for the known plug type measuring and regulating valve. It shows excellent linear adjustment characteristics.

In the case of a butterfly valve, its angular position can normally be separated from the outside.

Therefore, the measuring and adjusting valve of the present invention should be able to see the setting position of the stop from the outside.

One possibility for installing a stop with a horizontal threaded bore and a screw located in the bore in the measuring device allows the stop to move linearly through a groove in the bottom of the control box while the maximum opening angle is set. To be supported on opposite sidewalls of the control box lid.

The external sensing of the position of the stop is made possible by means of the stop having recesses for the pins of the boundary plates on the side facing the valve shaft, the boundary plates being pivoted around the boundary plate shaft parallel to the axis of the butterfly valve. Is installed under the lid of the control box.

With this design, the indicator is provided on the sleeve of the actuating means at a height movable in the lid space of the control box, wherein the space is provided by a top surface of the graduation provided on the partition wall which guides the stop on its bottom side. Constrained downward, constrained upward by the lower surface of the boundary plate.

On the side away from the indicator, the sleeve of the actuating means can be changed to a circular segmented plate with a circular segment shaped groove extending to the extent that the fastening screw is located through the opening of the control box lid and screwed into the bottom of the control box. .

Numerical data on the valve and measuring microwave is provided on the lid of the control box to avoid the use of inaccurate charts.

Embodiments of the device according to the present invention will be described in detail below with reference to the accompanying drawings.

The device shown in FIG. 1 is the butterfly valve casing 1, the measuring flange casing 2 located in the upstream stream of the casing, the control box 3 located above the butterfly valve casing 2 and the zero degree position of the butterfly valve. It mainly comprises an actuating means 4 located in such a way that the valve 5 is closed.

The nominal passage of the measuring and regulating valve is formed with a constant diameter that can take a slightly conical shape without any steps.

This spacing is related to the invention and is at most 0.6 times the nominal passage as shown by A in FIG. 2.

The butterfly valve casing 1 and the measuring flange casing 2 are each provided with four ears 6 so that they are attached to each other by screws 7 and nuts 8.

The ear part 6 of the butterfly valve casing 1 is provided with a relatively large hole 9 through which a connecting means such as an anchor can pass, thereby providing an assembly of the butterfly valve casing 1 with the measuring flange casing 2. It can be fixed between the pipe flanges 10, 11 (FIG. 2) of the heating system.

The butterfly valve casing 1 and the measuring flange casing 2 have rubber linings 12 and 13 therein, respectively.

A stub 14 is provided in a conventional manner so that the shaft of the butterfly valve 5 can rotate between a pair of ears 6 located above and below the butterfly valve casing 1.

Only upper butterfly valve 5 is shown in FIGS. 2 and 4 in the figure.

The upper stub 14 of the butterfly valve casing 1 has a flange 16 to which the control box 3 is attached by a screw connection 17.

The lining 13 of the measuring flange casing 2 is provided with a ring 18 attached in a conventional manner to the high pressure nipple 19 and the low pressure nipple 20. These nipples 19, 20 are butterfly valve casings. A small hose is connected to the pressure gauge connection 22 on the twisted support plate 23 arranged below the flange 15 of the stub 14 of (1).

If there is no pressure differential gauge as in the case described above, the connector 22 is sealed by the plug 24.

The control box 3, which is particularly important in the present invention, has a bottom portion 25, a readout slit, a trailing wall 29 and two side walls 30, provided with a straight groove 53 to guide the stop 26. 31 and a cap 28 having a front wall 32.

The side wall 30 and the front wall 32 have slits to allow the actuator 4 to move back and forth at an angle of 75 degrees (or 90 degrees if the stop is removed).

The partition 33 protrudes from the posterior wall 29 inwardly from the control box 3 and guides the stop 26 on its bottom side and rounded scale from 0 degrees to 90 degrees on its upper side. Has 34.

The stop 26 has a horizontal threaded bore 35 for the screw 36 which is rotatably supported on the side walls 30, 31 of the control box 3 but fixed axially.

At the externally accessible end, the screw 36 may rotate with the socket key (not shown) to displace the stop 26 through the groove 53 in the bottom 25 of the control box 3. It is provided with a socket hole 37.

The length of the groove 53 is sized to prevent the stop 26 from moving further at an opening angle of about 20 degrees before the threaded bore 35 is fitted with respect to the threaded portion of the screw 36. Have

Therefore, it is impossible to completely close the butterfly valve 5 by the stop 26.

At the boundary between about 75 degrees and 20 degrees, the adjustment range is larger and in particular closer to linear than in the conventional type of plug valve.

On the side facing the butterfly valve shaft 15, the stop 26 is a pin of the boundary plate 40 arranged below the cap 28 of the control box 3 for rotation about the vertical axis 41. 39, a recess 38 is provided.

The boundary plate 40 is shown in dashed line in that it is located on the transverse plane of FIG.

The vertical or boundary plate axis 41 is parallel with the butterfly valve axis 15.

Thus, when the stop 26 moves linearly, the boundary plate 40 covers a rather large angular area where the boundary is cleared at the maximum open position of 70 degrees. The butterfly valve 5 cannot reach the region as described below, and the position of the boundary plate 40 means that region that can be better represented when the boundary plate is painted in a dark color, for example red. It shows what to do.

In the illustrated embodiment, the control means 4 are shown as handlebars of a bicycle and are connected to a sleeve 43 which is connected to a butterfly valve shaft 15 via a hole in the bottom 25 of the control box 3. 42).

4 shows a connection comprising a so-called double D shape.

The sleeve 43 includes a cap 44, (FIG. 4) adjacent the stop 26 when the valve 5 is closed.

In FIG. 2 the indicator 45 protrudes from the sleeve 43 at a height lying between the scale 34 and the boundary plate 40.

It is located above the cross section plane and is well illustrated by the dashed line in FIG.

The mutual position of the cap 44 and the indicator 45 is selected such that the indicator cannot go to the area of the scale 34 covered by the boundary plate 40.

The bottom 25 of the control box 3 and the cap 28 are connected to each other by three socket bolts 46.

On the side facing away from the indicator 45, the sleeve 43 has a circular segmented groove through which the fastening screw 50 can pass and is inserted through the hole 49 of the cap 28 and the bottom 25. A circular segmented plate 45 that is screwed into.

The circular segmented groove 48 determines the fully open or 90 degree position of the butterfly valve 5 as well as the closed or zero degree position as well as limited by the stop 26.

By tightening the fastening screw 50 with the knob 51, the operating means 4 can be fixed at a predetermined position.

As shown in FIG. 5, the chart 52 on the cap 28 of the control box 3 is provided for a conduit with a 100 mm passage.

Where VALVE represents the valve and ORIFICE represents the measuring flange.

Α = opening angle, ζ = resistance coefficient, φ = amount of liquid (l / sec), and ΔP = pressure difference coefficient (kPa).

The measuring and adjusting valve of the present invention operates as follows.

If the heating system consists of several lines that must be measured and adjusted individually, the amount of liquid required per line for the overall required heating capacity is already determined at the design stage, including resistance and heat losses in the conduits, valves, bends and lift heads, and On the other hand, the amount of liquid required per line with respect to the position of the set valve is already determined.

Once the system is fully installed, the adjustment process is carried out as follows.

The measuring and regulating valve is operated by rotating the stop 26 to the required position by a screw 36 having a socket hole 37 and by fixing the butterfly valve 5 to the stop by the knob 51- Calculated per strand and varying-are set at locations.

Connect the pressure difference gauge and compare the read pressure difference with the required Q value of the chart 52 of the control box 3.

If adjustment is necessary, loosen the knob 51 and rotate the screw 36 in the required direction until the pressure differential of the pressure gauge matches the calculated Q value.

When the correct adjustment process is completed, the valve is fixed by the knob 51 again.

Finally, the other measuring and regulating valves on the remaining lines are set in the same way.

Embodiments other than those shown in the figures, in particular for use in process engineering, are also possible within the scope of the claims.

Claims (21)

In the measuring and regulating valve assembly, a stop valve having a nominal passage and movable to an open position (90 degrees), a closed position (0 degrees) and an intermediate position with the aid of an actuating means 14 for rotating the valve shaft 15. (5) and with a connection for accommodating the pressure difference over itself, the maximum opening angle of the stop valve being greater than 90 degrees in a precisely repeatable manner with a measuring flange arranged in an upstream stream of the stop valve. An adjustable stop 26 which can be moved linearly through a plane perpendicular to the axis of the valve shaft while the maximum opening angle is set to limit the open rotation of the actuating means to limit it to any small desired angle. Measuring and regulating valve assembly, characterized in that it comprises a control box (3) provided. The measurement and adjustment valve assembly according to claim 1, wherein the maximum opening angle of the stop valve (5) is adjustable between 75 and 20 degrees and the position of 0 degrees is in the closed position. Measurement and adjustment valve assembly according to claim 1, characterized in that the angular position of the stop valve (5) and the stop (26) on the control box (3) is visually detectable. 2. The measurement and adjustment valve assembly of claim 1 wherein the stop includes a rotatable screw (30) in a control box that is movable in the plane. 5. A measurement and adjustment valve assembly as set forth in claim 4 wherein the stop comprises a groove (53) in the control box in which the stop is movable along the screw. 6. The control box of claim 5 wherein the control box comprises a threaded bore 35 through which the screw passes and a cap 28 having opposing side walls 30, 31 on which the screw is supported, wherein the groove is a control box. Measurement and adjustment valve assembly, characterized in that arranged at the bottom (25) of the. 7. A measurement and regulating valve assembly according to claim 6, wherein numerical data (52) for said valve and measuring flange are given on a control box (28). 7. A measurement and adjustment valve assembly as set forth in claim 6 including an indicator (45) for visually detecting the rotational position of the valve shaft to detect the present angular position of the stop valve. 9. The boundary plate (40) according to claim 8, wherein the stop (26) is installed below the cap (28) of the control box (3) for pivoting around the boundary plate axis and parallel to the axis (15) of the stop valve. And a recess (38) for the pin (39) on the side facing the valve shaft (15). 10. The stop according to claim 9, wherein the indicator (45) is provided on the actuating means (4) at a height that can move in the space of the cap (28) of the control box (3), the space being at its bottom side. The upper surface of the graduation portion 34 provided on the partition 33 for guiding the portion 26 is downwardly limited, characterized in that the space is limited upward by the bottom surface of the boundary plate (40). Measurement and adjustment valve assembly. 9. The bottom of the control box according to claim 8, wherein the sleeve 43 of the actuating means 4 is located through the fixing part 49 of the control box cap 28 on the side facing away from the indicator 45. 25) A measuring and regulating valve assembly, characterized in that the fastening screw (50) which is screwed into is joined into a circular segmented plate (47) with a circular segmented groove (48) extending therefrom. 9. The measurement and adjustment valve assembly of claim 8, wherein the maximum opening angle setting provided by the adjustable stop (26) is visually detectable on a scale (34) functionally located relative to the indicator (45). 2. The measurement and adjustment valve assembly of claim 1 wherein the spacing between the stop valve and the measurement flange is 0.6 times the nominal passageway. 2. The measurement and adjustment valve assembly of claim 1 wherein the stop valve is a butterfly valve. A stop valve 5 and itself spanning the opening (90 degrees) and closing (0 degrees) and intermediate positions with the aid of the actuating means 14 for rotating the valve shaft 15 with a nominal passageway. A method for adjusting the maximum opening angle of a measuring and regulating valve assembly having a connection for receiving a means for measuring the pressure difference and having a measuring flange arranged in an upstream stream of the stop valve, the rotary valve 15 as a stop valve. And an adjustable stop 26 for limiting the open rotation of the actuating means to limit the maximum opening angle of the stop valve to any desired angle smaller than 90 degrees in a precisely repeatable manner. Providing a control box 3 and linearly at the maximum opening angle required from the initial position through a plane perpendicular to the axis of the valve shaft. Adjustment method comprising the step of copper. The method of claim 15 including visually indicating the maximum opening angle of the butterfly valve and the current angular position of the butterfly valve. 16. The method of claim 15, further comprising initially setting an adjustable stop such that the maximum opening angle is at an initial predetermined position and detecting a pressure difference across the measurement flange during fluid flow through the measurement valve assembly of the valve assembly. And adjusting the initial setting of the adjustable stop in response to the differential pressure to obtain the required maximum opening angle of the rotary valve. 18. The method of claim 17 including visually indicating the open, closed and intermediate positions of the rotary valve. 18. The method according to claim 17, comprising supporting an adjustable stop on a screw (30) installed in the groove (53) of the control box and rotating the screw to linearly move the adjustable stop through the plane. Adjusting method characterized in that. 18. The method of Claim 17 including providing a butterfly valve as said stop valve. 18. The method of claim 17 including limiting the maximum opening angle of said stop valve between 75 degrees and 20 degrees.