Apparatus for measurement and control, respectively, of temperature and/or pressure

#The present invention relates to an apparatus, particularly a combined control and regulating valve for liquids.

#Such valves are used e.g. in heating and cooling systems as well as in tap water systems and they are designed to regulate and cut off respectively a liquid flow, allow a measurement of the pressure difference, allow a discharge and/or filling of liquid and/or a temperature measurement. This valve suitably is designed to allow a presetting of the liquid flow, e.g. by means of the wheel, which is manually controlled or driven by a motor.

#The valves used so far for this purpose are often very complicated and expensive to produce, assemble and mount as well as to handle. Also, the various functions are usually not present in one existing valve construction or they are distributed in a not advantageous way, which makes at least some part or a few parts of the valve difficult to access, since such valves often are mounted in positions which are difficult to access. Also, there may be an increased risk of leakage and above all it is difficult or impossible to optimize the known valves as to various combinations of purposes and differently conceived plants, i.e. it is difficult to adjust the known valves to varying needs in a quick and simple way.

#Additional characterizing features and advantages of the present invention are set forth in the following description, reference being made to the accompanying drawings, which show some preferred but not limiting embodiments of the invention:

#FIG. 1 shows a combined control and regulating valve according to the invention in an axial diametrical section;

#FIG. 2 also is an axial diametrical section of a differently designed embodiment of a portion of the valve shown in FIG. 1;

#The valve shown in FIG. 1 is in its entirety designated 1. It comprises a housing 2 having a medium passage or the like 73 with an inlet 3 and an outlet 4 which, of course, may have reversed functions. A partition 5 between said inlet and outlet is provided with a main seat 6, with which a main valve body 7 cooperates, which is attached to the interior end of e.g. an outer spindle 8, on the exterior end of which e.g. an adjusting wheel 9 is disposed having a wheel screw 10, an O-ring 11, an indicating ring 12, a digit wheel 13, a pre-setting screw 14, an inner spindle 15, a threaded casing 16, a lock ring 17, a stuffing box packing 18, a plate 19, a packing box nut 20, a gland 21, a stuffing box packing 22, a top piece 23, a packing 24, a cone 25, a seal ring 26, and a connecting joint 27 for said top piece. This portion of the valve mainly is in accordance with the device described in SE-A-448 651 and consequently it will not now be described in further detail Of course, another type of adjusting means, e.g. an electric motor (not shown), can also be used.

#Connecting joint 27 is provided with a ring canal 28, which is inwardly open- and communicates with outlet 4 via a canal 29 and which is connected to a bore 30, which in its turn is connected to a threaded hole 31, which ends freely at the exterior side of housing 2, suitably between inlet 3 and joint 27, and which is closed at its end in the housing. A nipple 74 with a measuring portion 32 is threaded into this hole and provided with an adjusting ring 33, a sealing body 34, a holding element 35, a seal 36, a cover 37, a nipple neck opening 38 and an insertion opening 39, which two openings are designed for an insertion of a measuring probe through the sealing body 34 to measure pressure and/or temperature.

#Inlet 3 communicates via a passage 40 with a multiple function nipple 50, which comprises a measuring portion 42, which suitably roughly is in accordance with the way parts 31-39 are designed as shown. Consequently, in this part of the drawing 41-49 designate parts, which correspond to parts 31-39. However, interior end 51 of measuring portion 42 is in this case provided with a bevel 52, preferably on all sides, having a valve body function designed for a sealing or closing cooperation with a seat 53, which suitably comprises a sharp step in passage 40, more precisely at the transition of the passage from an interior smooth part to an exterior threaded part 54, into which measuring nipple 42 is secured. An interaction between a sharp edge and a beveled surface results in a satisfactory sealing effect, also if no type of special sealing or packing is used, particularly in case the sharp edge is deformed somewhat and in this way possible minor irregularities easily and simply are removed.