REGULATING VALVE

The invention refers to a regulating valve, consisting of an adjusting knob, which is located on a stationary, coaxial base and its rotating motion is limited by two for instance pins parallel to the axis of rotation to a turn smaller than a revolution, which downward intersperse a circular wall, which is coaxially arranged inside the button and with a firm attack s of the base zus.mrùenwirken, which is arranged underneath the circular wall. Such regulating valves in particular used for the thermalstatic or non-thermalstatic attitude of Helzkörpern of Zentralheizun gs fitted. The pins must be able to bear relatively high bending forces e.g. if a user exercises on the adjusting knob at the end of the stroke Kraft. If the attack or a pin is damaged, the border position of the adjusting knob is falsified. In particular if the regulating valve is thermalstatic, the permissible limit temperature can be exceeded. Also a damage of the regulating valve can occur. With well-known regulating valves of the kind mentioned before the radial wall has constant width. If the adjusting knob is operated, in order to bring it from the extreme position into the other one, effectuation its Einoder unscrewing its axial adjustment. Therefore the axial distance between the firm attack of the radial wall from a pin to the other one is different. This means that the two pins at the attack with different lying exposed sections attack. Since the enlargement of this lying exposed section reduces the mechanical resistance of the pin at the end of the stroke of the adjusting knob, it is necessary to dimension the pins concerning to most unscrewed position of the adjusting knob or to plan however for the two border positions of the adjusting knob different pins. The invention is the basis the task to create a regulating valve to bear this disadvantage eliminated, which means able is, with two equal stop pins essentially identical torques in its two border positions. Solved this task in accordance with invention thereby that the circular wall in the places, in which the two pins intersperse it exhibits different heights (e + h1, e + h2) and the difference of the two heights equal the axial shift of the adjusting knob between the two border positions is. If in addition the circular wall is downward essentially to a complete stop extended in each border position of the adjusting knob, the torque taken up at the attack can be very high. The invention is particularly applicable with advantage, if the pins are solvable and can in several extent places of the circular wall be arranged. If the height of the circular wall evenly increases a circular projection/lead, whose end face is designed as screw surface between two extreme places and, forms within this range at their the attack course-turned side and which resembles pitch as the screw thread of the adjusting knob exhibits, the lying exposed section of the pins and thus the taken up torque are independently of their extent positions essentially constant. The invention is below described on the basis the Fig.1 to 4 for example. It shows: Fig.1 a side view of a thermoplastic regulating valve in accordance with the invention, Fig.2 a partial plan view with decreasing cover, Fig.3 a Fig.1 appropriate representation, whereby however the top is shown in the axial section along the line III III in Fig.2 in a first border position of the adjusting knob, and Fig.4 a Fig.3 appropriate partial representation, from which however the adjusting knob in a second border position comes out. The thermalstatic regulating valve shown in Fig.1 consists of a T-Verzweigungsstück --1--, on a thermostat head --2-- is arranged. The piece of bypass --1-- an entrance pipe has --3-- and an output pipe --4-- for the warm-exhausting flow means, that into the piece of bypass --1-- toward the arrow f and toward the arrow g withdraws, the head enters --2-- is at the end of the third pipe --5-- the piece of bypass --1-- by means of a threaded ring --6-- fastened, which carries outside grooves. The pipes --3 and 5-- have just like the head --2-- a common axle X-X. If the regulating valve at a heating element is installed, the axle X-X is horizontal. In the following description the axle X-X is accepted for the sake of simplicity as vertical. Nr.358230 the head --2-- has a base --7--, its lower part by openings --Te-- broke through, around four projections/leads --7b-- to form. The base carries the threaded ring at its lower part engaged and freely swivelling --6--. On the base --7-- is a Einstellkn0Pf --8-- screwed on, several outside markings --9-- , those carries alternatively opposite only one marking at the base --7-- to be arranged can, in order to be able to specify the respective prescribed temperatures. The different Einste! lay correspond more or less eiugeschraubten situation of the button --8--. This button --8-- is outside splined and at his top by a removable cover --11-- locked, D r a central opening has, by the one end of a temperature-sensitive element over the head --2-- outward manages and so to the ambient temperature I0 to be exposed can, which exists around the thermalstatic regulating valve. Fig.3 shows the inside of the thermostat head --2--. The upper end of a control bar --13-- a valve (not shown), that in the piece of bypass --1-- and the flow rate of the warm-exhausting flow means is arranged by the piece of bypass --1-- determined, stands from the pipe --5-- outward and over the ring --6-- forwards. The bar --13-- upward, i.e. into the maximum open position of the valve, by a coil spring (not shown) linked up, those is in the piece of bypass --1-- is arranged. Over the openings --Ta-- (Fig.1) the base has --7-- a cylinder wall --14--, their exterior surface --15-- is threaded, around the adjusting knob --8-- to take up, some internal thread --16-- has. The button --8-- has in a certain distance from his upper end a radial ring --17--, the one central opening --18-- , the one upper recess forms --19-- limited, the one socket directed downward --20-- the cover --11-- takes up. The temperaturampfindHche element --12-- points a central extended part --21--, a narrow lower part --22-- with a thread, that into a ring --23-- screwed is, and an adjustable Betätigungsstfft --24-- up, which manages downward over this ring. The lower part of the ring --23-- and the part --21-- the element --12-- form two shoulders, between those a plate --25--, those at the range of the opening --18-- , and the upper end of a carrier lies close --26-- for instance in form of a hollow cylinder with durchbroehener wall are jammed. The lower end of this carrier forms an outside ring --27--, that of the upper ring --17-- the button --8-- by a Sehraubenfeder --28-- one keeps removed, which is relatively strongly squeezed together between these two rings. The Scckel --7-- takes in a central lower drilling --29-- a hollow piston --30-- up, in its unterere part a screw --31-- , those is screwed with their head --32-- on the lower range of the drilling --29-- rests upon. The other end of the piston --30-- an outside shoulder has --33--. A relatively weak coil spring --34-- lies on the one hand on this shoulder --33-- and on the other hand on the upper range of the drilling --29-- up and presses the piston --30-- constantly upward. The piston --30-- is with an even or broken through disk for the edition of the pin --24-- the temperature-sensitive element --12-- provided. The head --32-- the screw --31-- thus constantly is because of the end of the valve rod --13-- on, and if the ambient temperature in such a manner is that the pin --24-- only around a very small distance over the ring --23-- manages, so that it the disk --35-- not reached, the head lies --32-- also under the effect of the feather/spring --34-- at the lower range of the drilling --29-- on. The feather/spring --28-- made possible also the raising of the element --12-- and the carrier --26--, if with closed Vent£], whereby the head --32-- at the bar --13-- and the pin --24-- at the disk --35-- , the temperature attacks progressively rises. Like Fig.2, in that the cover shows --11-- for the sake of the clarity, is the ring is distant --17-- of axial openings --36-- interspersed, those over its extent in the same distance from the axle X-X and radially to the inside of the cylinder wall --14-- the base --7-- are distributed. Over two of these openings, also --36a-- , is a cast-on projection/lead is characteristic --37-- arranged. In each of these projections/leads is a pin --38-- begun, the appropriate opening --36a-- crossed and under the ring --17-- manages. Two further adjustable pins --39a and 39b-- same length as the firm pins --38-- can solvable from top to bottom in two of the other openings --36-- is used, whereby their head at the top side of the ring --17-- lies close. Two of these openings, also --36b-- , is Nr.358230 is characteristic on the small sheet of 30° that the two openings --36a-- separates. A large number of openings --36c-- is intended on the complementary large sheet. As Fig.3 shows, the cylinder wall carries --14-- the base --7-- in an extent place an attack --40--, that is axially upward directed and toward the course of the pins --38 and/or 39a and 39b-- s lies. The impact --40-- those cooperates under the ring with the parts of these pins, --17-- lie. If the adjustable pins either pulled out or in the two openings --36b-- , is the stroke of the button is arranged --8-- thus it limits that or others of the firm pins --38-- with the attack --40-- into contact comes. Thus the maximum stroke of the button on somewhat less than a complete turn is limited. If against it the two adjustable pins in openings --36c-- , as Fig.2 shows and is in practice general this the case, is the stroke of the button is arranged --8-- reduced and on the circular arcs, that limits between these two pins --39a and 39b-- lies and the firm pins --38-- does not contain. The inside of the ring --17-- is with a cylinder wall --41-- provided, which manages LS axially downward. This wall --41--, their radial dimension is constant and their middle radius equal to the distance of the openings --36-- from the axle X-X, extends over the entire large sheet, that is the two openings --36b-- separates, so that this wall of the two openings --36a-- and all openings --36c-- is interspersed. The axial width e of the ring --17-- (Fig.3) that is constant the openings in the range, --36-- contains. The width h of the wall --41-- takes in clockwise direction, if one regards the Regelventäl in Fig.2 from above on its entire length regularly too. The front surface of the free end --42-- the wall --41-- a screw-shaped ramp, whose upward gradient has the same size and the same direction as the bolt connection, forms those by the threads --15 and 16-- the base --7-- and the button --8-- one forms. 2s the axial distance j and/or the gap between the attack --40-- the screw-shaped front surface --42-- is very small and remains independent due to their form of the situation of the button --8-- constantly. The distance j lies e.g. in the order of magnitude of 1 mm and is in practice small with consideration of the manufacture tolerances as as possible. The length e + h of the openings --36-- takes in clockwise direction of an opening --36b-- on the other hand regularly too. The function of the regulating valve is the following: It is accepted, how the Fig.2 and 3 show that the two adjustable pins --39a and 39b-- in each case in an opening --36c-- are arranged. The stroke of the button is limited thereby that the lower part of these two pins at the two exteriors of the attack --40-- , and amounts to with the example shown for instance a half revolution lies close. Since the length of the pins is the same, the distance shifts, on that it over the spiral front surface --42-- manage downward, according to their turning position. The adjustable pin --39a--, which lies in the Fig.2 and 3 left, stands around a larger distance than the other one forwards (DL and d2 in Fig.3), whereby the relationship DL is fulfilled + hl = d2 + to h2, if hl and h2 the respective sizes of the lengths h according to the positions of the two pins --39a and 39b-- are. In the first border position of the button --8--, which is shown in the Fig.2 and 3, the left pin works --39a-- thus with the attack --40-- on a distance DL - j together, which is somewhat smaller than DL. If one on the basis of this position the button --8-- in Gegenuhrzeigerrichtung into its other border position, receives one turns the arrangement of the Fig.4, in that the attack --8-- over for instance a half turn concerning the base --7-- turned and therefore around for instance the half upward gradient of the 4S bolt connection --15 and 16-- is elevated. In this position the pin lies --39b-- at the attack --40-- on a length d2 - j on. In the course of the movement of the button --8-- becomes constant the adjustment of this element by the change the width h of the wall --41-- compensated, so that the gap j remains constant. Independently of the positions of the adjustable pins these always push at the attack --40-- on, SO whereby the same lying exposed section, which is about zero and equal to the gap j, exists. The same is valid for the two firm pins --38--, if the adjustable pins in the two openings --36b-- are arranged. Since the size of the lying exposed section j determines the mechanical resistance of the lying close pins, each deformation of these pins or the attack can be avoided, if the operator at the end of the stroke a torque on the button --8-- exercises, which is more largely than necessary. This can bear thus at the attack with a remark example torques up to 0,8 and even to i mkg. With the example shown obtained security guarantees that the border positions planned for the temperaturempfindiiche element are considered exactly and that in particular the maximally permissible temperature is not exceeded. Of course the invention can be applied to other kinds by thermalstatic or non-thermalstatic Regelventflen with manual control, provided that the maximally usable stroke of the operating knob of mine is as a complete revolution.