DE7934293U1 - MECHANICAL COUNTING DEVICE FOR DETERMINING THE HEAT, IN PARTICULAR FOR CENTRAL HEATERS OR FOR MEASURING HOT WATER, WHICH IS ARRANGED IN THE TRANSPORT SYSTEM OF THE ENERGY MEDIUM OF A HEATING DEVICE - Google Patents

Description

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Walter Opitz
Sven-Hedin-Str «21

3000 Hanover 51

Mechanical counting device for determining the heat quantity '···

The innovation relates to a mechanical counting device for determining the amount of heat, especially for central heating or for hot water consumption, which in; TrariB port system the energy carrier medium of a heating device is arranged,

Such directly or indirectly measuring counters should in particular in large residential complexes record the amount of hot water consumed as precisely as possible, so that the injustices a flat rate calculation can be circumvented. A radiator or a radiator system (floor heating) should The amount of heat supplied and to be calculated is recorded and totaled as precisely as possible over the entire consumption period » The same applies to the amount of hot water used at the designated tapping points.

The measuring system should be as independent of the ambient temperature as possible as well as other disruptive influences such as strongly changing consumption quantities of the energy carrier medium work precisely for a long period of time.

Evaporation heat meters are known to solve these problems to use the z. B. in PS 1083 067 are described. A measuring device with a linear measuring scale is described here, in which the housing consists of two parts, which form the front and rear front.

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carry a measuring tube placed between them, in which a high-boiling alcohol is located. The geek of invention is based on »adjusting the kettle as clearly as possible, so that the measurement errors due to shifting are as small as possible "The amount of alcohol evaporated from the measuring tube serves as a reference value for the amount of heat consumed" The ". Such devices are, however, as can be seen from the literature, very imprecise, so that this type of device is used by the construction companies can only be used as an auxiliary push device *

A slightly improved version of the evaporative heat meter described above is described in GM 7822 969 « The aim here is to protect the housing, which consists of a rear part and a front part, with the measuring ampoule is recorded between the two. At the front or on the side walls of the housing is a reversible thermometer strip attached, the several jumping by 5 ° C, Has lined up color fields.

The applicant is based on the correct assumption that the measuring liquid expands greatly when heated and in this Status is read.

It is not possible to make a correct statement about the heat consumption in this way, as the degrees of heating of the various home heating systems are naturally different. The thermometer strip now has the task of displaying the temperature of the measuring liquid present at the time of reading. It will now suggested using this temperature correction value to correct the reading results via an electronic data system.

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Even this high expenditure of heat with its additional Error or Possible calculation errors, the system-related Do not eliminate the disadvantages of evaporation measurement. Tests of the evaporation meter show, for example, the following findings :

"Under the same conditions, the heat meter in a.": heated room with open pen windows shows less consumption than the device in a room with closed windows ... In addition, the heat meter does not take into account the heat transfer from a warm to a neighboring cold apartment permit ..."
(Die Zeit, lir .: 37, page 25)

In a further known embodiment, a heating device is in the flow or return of the heat transfer medium Arranged impeller, the counter by means of a magnetic coupling via a temperature-controlled hydraulic gear coupled force-fit with the impeller. The two hydraulic ones Coupling parts are designed like the rotary viscometer and counteract each other. The one is heated by the flow, the other by the return. There here there is only a non-positive and no positive connection and, in addition, the distances for the The effect of the magnetic forces has been chosen to be too large, a non-slip ^ Function not expected «The system error is so large that an exact operation does not seem possible.

Another heat meter is known from OS 2 716 787. The heat transfer medium flows through it and has zv / ei partial temperature sensors which are arranged on the flow and return flow. In addition, a device for generating a vortex is required with which the flow of the heat transfer mediumB has a non-axial velocity component can be rented »

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Furthermore, a turbine seated coaxially in the line is required, to which a counting device is assigned. the Vortex generating device is controlled by the sensors in the flow and return so that the Anr hl of the turbine revolutions corresponds to the product of the flow rate and the temperature difference. The consumed The amount of heat can thus be read off directly.

The device may function usable as long as it is from one Is adjusted and serviced by a professional. With the slightest deposits the flow components of the swirling water change and thus result in a non-verifiable System error. Pure maintenance-free for years This construction is certainly not suitable for long-term use.

The known solutions are either - like the evaporation heat meter - in principle inaccurate and do not result in reproducible measured values or they are as described Impeller measuring systems are technically so complicated that a trouble-free, safe puncture with sufficient measuring accuracy is not feasible.

The innovation is based on the task of describing a mechanical counting device for determining the heat quantity, which can be operated precisely and maintenance-free over a long period of time. The influence of the ambient temperature and adjustment inaccuracies of measuring elements should be eliminated and direct measurement of the energy carrier should be possible. The device must be calibratable and the results must be exactly reproducible. In addition, a one-time installation should be carried out without periodically changing resp. Wearing parts are made possible ₆

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This object is achieved according to the invention in that a rotor body (3) in the transport tube of the energy carrier medium is attached, the revolutions of which are transmitted via a rigid reduction gear (13.7) to an adding counter (9) be transmitted by means of gears (12,1), the adder (9) in a separate unit from the quantity counting unit Housing part (1) is housed and between the transmission elements of the measured values there is an automatically releasable or producible form-fitting connection (11, 12).

In order to ensure sufficient corrosion resistance of the mechanical counting device, it is being developed the innovation makes sense to manufacture the lower part or upper part from gray cast iron.

In a further embodiment of the innovation according to the invention, red bronze, brass, or aluminum can also be used as the material Also hot water resistant plastic e.g. PE can be used »Care should be taken on every pail that between the pipeline and the material of the mechanical counting device no noticeable electrolytic voltage gradient arises.

Tests have shown that at high water speeds and even numbers of blades of the impeller (3) disturbing if even slight resonances occur, which lead to signs of wear in the bearing. With a variation of the Innovation is therefore preferred with odd numbers worked with 5 wings.

In order to simplify the assembly, it is suggested that both ends have a standard thread Cz.E. 3/4 ") to equip by means of Union nuts or known spacers to establish a connection to the existing pipeline system.

To increase the service life of the mechanical counting system the axis (4) of the impeller (3) is to be made of nitrided steel. Due to the high surface hardness, on the one hand the wear resistance optimized on the other Side distortion can be avoided, which occurs primarily when hardening high-quality steels.

In order to make the mechanical counting device maintenance-free, it was marked with a water-lubricated bearing Worked through the bearing combination of steel in polyethylene shells.

One problem is the sealing of the interior space (β) of the reduction gear (7). If no large frictional forces are to occur at the sealing point (5), ingress of water must be expected. However, experience has shown that this also leads to deposits or signs of corrosion on the small parts of the transmission. In one embodiment of the innovation it is therefore proposed that the gears (7) and seals (5) have such a large working gap that preferably low-viscosity oil is used. If the specific gravity is less than 1, it is ensured that the penetrating water, which is below the sealing point (5) via a compensation bonrung in the space of the transmission shaft (13), fills up bz ¹ '. If necessary, you can hit oil cushions (6) above σ and, due to the different specific weights, can penetrate.

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In order to ensure a high measuring accuracy of the counting device, (when converting to heat consumption) it is suggested that a control thermostat in the lleizungssyote; n to use «This prevents deir. Excess radiators that cannot be converted into space heating Energy is supplied. It recommends calibration according to the renewal in a further variant to switch the counting device in front of each radiator.

In a further embodiment of the innovation, the Xe ^ wheel (11) is incorporated into the axis (4) of the impeller Αοϊΐ3β be-3: itzeri .uu! 3 - through a known Mit Be like ζ.ϊί. Gluing, Hartlü t ~ i :. .; :: W. to connect »Also form-fitting connection si-.ά ..-. ögl-: eh

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Z :. --i \ ~ T /.- de:.tir / n Aujfür.rungsforiu it has made sense four -ijs ^ -Lotel it, ir. "Jnt-vrt'iil (2) of the mechanical counting device VJT ie- each piece ( 13) to cast in the seat for a known Tr.er..ij3tütv = r: til or (in the case of plastic

From fT.rui'.jscei.rpiel der! Inflation is in the drawing e represents' ri -./ is described in more detail below.

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Jijur 1: The sectional side view of the mechanical Counting device sit measuring room and Pledge wheel.

7ijv: r ? '. Section of the front view with transmission shaft and U ^ .tersetzurigg gear.

rl / - ; r 3 'On top of it si c: vt r suggests the display of the adder

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FIG. 1i The impeller (3), which sits on the axis (4), fills the flow or measuring space (H) with as little gaps as possible. This is intended to ensure a minimization of the slip losses «Pas upper part

(1) is attached to the lower part by means of a plate seal

(2) put on and positively connected »Both ends (1O) of the durohydric flow pipe have a standard thread provided in order to establish a quick and safe connection to the pipeline »

Figure 2: The preferably five-blade impeller (3) sits with its steel axle (4) in plastic bearing shells (8) “There is a bevel gear on the face of the axle (4) or a bevel gear (11) attached, which via a further bevel gear (12) on the Shaft (13) on the reduction gear w) located in the upper part (1) is mounted in oil and actuates the adding unit, not shown in the drawing, which adds up the measured values over the consumption period. The upper part (1) is with a Cover plate provided, which is clamped absolutely airtight and oil-tight by means of the seal and fastening elements (15) is.

Figure 3! In the plan view of the mechanical counting device the display of the adder is shown. The window is made in a known manner from a heat-resistant Glass or plastic formed, v / obei a functional and reliable seal is made must become.

* v / irkt. This reduction gear (7)

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The advantages of the present application according to the invention are, above all, that a direct measurement of the Energy carrier medium the influences of the environment baw «der Handling (ambient temperature üsw «) have been switched off« l) he measurements are exactly reproducible, the device is Can be calibrated and works maintenance-free over long periods of time with high measuring accuracy »In addition, there are no periodically wearing replacement parts are provided, so that a single installation is sufficient and the reading can be done by the apartment owner "

Claims (1)

Walter Opitz
Sven-Hedin-Str. 21 Hanover 51 SCHUTZA H SPR ^: J CHE 1.) Mechanical counting device for determining the amount of heat especially for central heating or for hot water "consumption measurement," which is arranged in the transport system of the energy carrier medium of a heating device characterized, that in the transport tube of the energy carrier medium, a rotor body (3) is attached, the revolutions of which over a rigid reduction gear Ü3,7) are transferred to an adding counter (9) by means of gears (12,7), wherein the adder (9) is in one of the identifier counting unit separate housing part (i) is housed and zv / ischen the transmission elements of the measured values one automatically There is a releasable or producible form-fitting connection (11, 12). 2.) Mechanical counting device according to claim 1, characterized in that that the upper housing part (1) and the lower housing part (2) are made of gray cast iron. 3.) Mechanical counting device according to claim 1, characterized in that that the upper housing part (1) and the lower housing part (2) are made of brass. • im · ι * · * 1 · «ι · · 11 r« • · «» «· III I I III ItI 4.) Mechanical counting device according to claim 1, characterized in that that the upper housing part (1) and the lower housing part (2) are made of aluminum. 5.) Mechanical counting device according to claim 1, characterized in that that the upper part of the housing (1) and. the lower part of the housing (2) made of hot water-resistant plastic, e.g. PE are made. 6.) Mechanical counting device according to one or more of claims 1 to 5 characterized, that the impeller (3) has an odd number of blades, 7.) Mechanical counting device according to one or more of claims 1 to 6 characterized, that the impeller (3) preferably besitr.t 5 blades. 8.) Mechanical counting device according to one or more of claims 1 to 7 characterized in that the lower part (2) at its ^ nden (1O) standard thread that allow easy connection with existing steel pipelines. 9.) Mechanical counting device according to, one or more of claims 1 to 8 characterized, that the axis (4) of the impeller (3) is made of surface hardened (e.g. nitrided) steel « ι ifii it mi it Ii II ι ιΐ ι ι ι ι ι ι ι ill ι I · ι I ι ι ι I I «I I. ' ι. ι ι ι ι ι · ι ,. III Il Il * * Il I * 10j)! Mechanical counting device according to one or more of claims 1 to 9 characterized, that the axis of the impeller (4) in plastic plain bearings is made of PE, 111) Mechanical counting device according to one or more of claims 1 to 10 characterized, that the gears (7) and seals (5) have such narrow working gaps that preferably low viscosity Gel is used, 12.) Mechanical counting device according to one or more of claims 1 to 11 characterized, that it is connected to tinea cone thermostat. 13 ·) Mechanical counting device according to one or more of claims 1 to 12 characterized, that they are in front of every radiator in a central heating system is switched. 14.) "'-'. · 'Jh ^ ni3ehe counting vcrrir? Hv.t \ r na-.:h a: or uehreren eggs claims 1 to 13 characterized, da2 the bevel gear (11) on the axis (4) of the impeller [Z) is processed. 4 111 I «« III Il Il I II I «III I III I I t I III I III Il I Il III! Ill I. Il Il Il Il Il 15 «) Mechanical counting opening seals according to one or more of claims 1 to 14 characterized, that the bevel gear (11) on the axis (4) of this impeller (3) by gluing or by known form-fitting or Frictional locking device is attached " 16.) Mechanical counting device according to one or more of claims 1 to 15 characterized, that in the lower part (2) between the running area (14) of the impeller (3) and the threaded piece (10) Thermostatic valve is cast in.