HU195551B - Apparatus for carrying out periodic check measurements on public utility networks - Google Patents

Abstract

The invention intends to provide the possibility of periodic but recurring measurements on public service networks by establishing measuring points on the network and proposing a measuring device for measuring the required parameters at these measuring points and then removing them. The measuring point is a branching piece (2) located on the pipe (1), which is a ball valve, a sliding valve or a rotary piston pipe closure with an unchanged flow cross section (3) having an unchanged flow cross section, and is threaded at the end. The gauge is a probe (22) that can be discharged through the taper piece into the pipeline, which represents a flow resistance and to measure the pressure drop thereon through two opposing holes (23, 24) running in the direction of flow into a neutral hole (26) leading to the cavity. equipped. An electrical sensor (27) in the cavity (26), e.g. a temperature sensor can be placed. The holes (23, 24) and the cavity (26) are connected to the measuring head (6) by means of pipelines, the sensor (27), the differential manometer, the manometer, the thermometer, and the like. Suitable structural elements (pipe closure combination) and suitable (self-locking pneumatic and electric) connectors. (Typical illustration is la and 3.). -1-

Description

The present invention relates to an apparatus for the low-cost, easy and easy solution of the flow through the use of measuring points and small-scale measuring instruments on public utility (drinking water, hot water, gas, district heating) networks (including circuits). Periodic control measurement of the defining parameters (flow direction, flow rate (flow rate), pressure, temperature, and even velocity distribution) of the medium supplied without the need for a large number of expensive instruments and / or signal transducers to be incorporated into the network.

The operation of public service networks, which are very often constructed in a circular system so that not only the flow rate (amount of fluid flowing through) but also the direction of flow may vary depending on the nature of the consumption, is of great importance. regular measurements during which the basic parameters (flow rate, flow direction, pressure, temperature, etc.) of the delivered medium at each point of the network become known. In particular, these measurements will become irreversible when it is necessary to expand the network (to cope with new branches) or to change the consumption quota of one (large) consumer. In this case, upgrades without proper knowledge of network operating conditions can easily lead to service disruption. However, these measurements are not required for continuous operation to the extent that for this purpose the installation and operation of measuring equipment or the installation of transducers and the remote indication of parameters are necessary or economical for the establishment of networks.

For certain structures of the networks (gas networks, gas transfer, booster, pressure regulator, etc. stations, water networks, booster stations, manifolds, sewage networks, pumping pumps, etc.), constant measurement may be justified and even remotely sensed, even as recommended in U.S. Patent No. 182,813 for gas transmission stations.

Notable points in distribution networks (at the connection points of rooms or larger industrial customers) may require the installation of a constant flow meter, such as that described in U.S. Patent No. 180,033. At other points of the network, however, the permanent installation of instruments is not justified. Therefore, at these locations, when the need for measurements arises, the network is disassembled by wiring the pipe and then, after the measurement, is restored to its original state.

There is a commercially available flow meter called "ANNUBAR" that measures the flow rate and thus the volume of the fluid at temporary probes (Honcywcll), but does not measure the flow direction or any other parameter of the medium, and the instrument does not solve the problem of properly connecting the required differential manometer for local resistance measurement.

Also known as Strömungsmitter typ. 114 "(Laaser and Co.), which uses a spinner flowmeter for measurement but does not measure any other parameter in the medium.

The present invention discloses an apparatus which requires the installation of a "measuring point" at points of interest for the installation of a public utility pipeline system, consisting of a branching piece of relatively small cross section, which is threaded at the end and fitted with a pipe closure fixture. having a cross-sectional cross-section similar to the nominal cross-section and in which the medium passes through without any bending (such a valve stopper may be a known ball valve, gate valve or rotary valve stopper which are known per se and are commercially available.) which is preferably placed perpendicular to the public utility line, is closed under normal operating conditions by keeping the pipe closure assembly closed, in addition, by inserting a threaded closure at the end of the pipe let's go. The invention further describes a measuring probe that can be inserted through this connecting pipe into the utility pipe perpendicular to the flow direction by removing the threaded closure, replacing the element with a threaded sealing element, thereby inserting the probe into the pipe closure fitting, the pipe closure assembly is then opened and the probe (after tightening the seal slightly) is moved and then, when pushed in place, the seal is tightened by tightening the thread. The probe is provided with a bore in the direction of flow in which a local resistor (preferably a dummy ring) is provided and a hole is provided from each side of the local resistor to the outer end of the probe. The probe is also provided with a hole in a fluid-neutral direction which leads to the probe's inner cavity and from there an additional tube to the probe. Any other probe (e.g., thermocouple or electrical temperature-dependent resistor) may be placed in the cavity and the terminals of these sensors inserted into the probe.

The probe is equipped with the necessary fittings (eg differential pressure gauge, (absolute) pressure gauge, remote electric thermometer, etc.) for the connection of the measuring instruments or transducers, and the corresponding instruments are connected to them.

This gives us a metric that is equivalent to a fixed metric already built when investing. It is also possible to read the instantaneous values (by means of instruments) (by recording instruments), record changes in values over a period of time or (by connecting appropriate transducers and signal transmitters) and transmit the measured values to a central measuring station for a period of time.

After the measurement (or measurement process) has been completed, the probe is removed from the junction piece by loosening the seal, closing the pipe closure, placing the closure at the threaded end of the tube, and the measuring point remaining a common point in the wiring.

If the pressure in the public service pipeline justifies it - because of the high pressure

195 551 'I friction on the gasket is not sufficient to secure the probe - the force in the direction of the branch of the branch pipe is taken by attaching the probe's probe head to the conduit.

Thus, a measuring device is obtained which, using relatively low cost measuring points and a small number of measuring devices, can monitor the operating conditions of a complete network system at random intervals by controlling several parameters at any point without disrupting the line and disrupting operation (service).

The measuring device can be improved by installing a branching miracle (especially in the case of larger diameter utility lines) in two opposite directions, one of which is accessible so that its end is accessible for measurements and the other on its opposite axis, built into the soil or otherwise into the environment when needed. In this case, the length of the accessible miracle must be exactly the same size at every measurement point in the entire pipe network, and the opposite end of the miracle must be reliably sealed (eg by welding). By placing a millimeter scale on the probe stem and reading its value at the edge of the wonder piece, the probe immersion depth is accurately known. At this point, it is possible to determine at which point the cross-section of the utility line is measured (e.g., the flow rate of the medium). Thus, the probe can be plotted along the entire cross-section at the same distance (eg, every 2 mm) and the measurement can be made in all cases. Because the diagram is representative of the flow pattern and is a clear function of the Regnolds number, information that is not yet available on the flow in the pipeline can be obtained.

Two possible embodiments of the invention are illustrated in the figures, where

Figure 1 is a cross-sectional view of a public utility pipeline with a branched miracle on it and a probe in it,

a) side view,

(b) front view of the figure.

Figure 2 is a schematic diagram of the probe's internal circuitry.

Figure 3 is a sectional view of a possible embodiment of the lower end of the probe.

Figure 4 is a sectional view of a public utility pipeline with two branched miracles placed on it and a probe thereon,

a) side view,

b) front view.

The tube 1 shown in Figure 1 has a bore at the top of the wall and a branching piece 2 (welded in the figure) attached to it. There is provided a pipe closure assembly 3 which is an example ball valve in the figure. Through these, the probe extends into the inner space of the tube 1, which is fastened by the screw 4 on the tube closing assembly 3. The probe is fitted with a connector 5 to the probe 6, which has a valve body 8, connectors 7, a discharge valve 9, and a connector 10.

! I

The internal arrangement of the valve body 8 and the probe 6 is shown in FIG. The conduit 11 is connected via the conduit 16 to the connector 1A, but is connected via the conduit 20 to the outlet 21 and also to the conduit 12 via the conduit 18. The conduit 12 is connected to the connector 12a via the conduit 17, but is also connected to the conduit 11 as described above. The conduit 13 is connected to the connector 13a via the conduit 19. The wire 14 is connected to the connector 14a and the wire 15 to the connector 15a. In the figure, the connectors 11a, 12a, 13a are self-sealing pneumatic connectors, while the connectors 14a and 15a are electrical connectors, the wires 11,12, and 13, and the branches connected thereto, are pipelines. while wires 14 and 15 are electrical wires.

3, the conductors 11 and 12 are connected to bores 23 and 24 formed on the downstream faces of the probe, and the conduit 13 engages with the cavity 26, which is in contact with the inner space of the tube 1 through the bore 25. The sensor 27 is located in the cavity 26, which is, for example, an electric temperature sensor, optionally an FE-KO thermocouple, but also any temperature-dependent resistor or any other physical characteristic transducer that transmits an electrical signal. The (electrical) poles of the sensor 27 are guided through the conductors 14 and 15 to the terminals 14a and 15a on the probe 6.

The end points of the wires 11 and 12 within the probe 22 may also be configured differently. The holes 23 and 24 may also be formed by crossing the probe with a centering ring placed in the center, the conductors II and 12 being connected to both sides of the ringing ring. Alternatively, the bores 23 and 24 may form a venturi tube inside the probe. The point is simply to have a local resistor in the path of the fluid flow where a pressure drop is created, with the conduit 11 branching out from the lower pressure location and the conduit 12 branching out from the higher pressure location, or vice versa. In the case shown, the probe 22 itself forms the local flow resistance which produces this (minimal) pressure drop.

The embodiment shown in FIG. It differs from that shown in Fig. 1 in that the holes 23 and 24 are provided here with the hole 31, which is located at the end of the probe and whose position on the scale 30 can be read. The branch pipe piece 28, which is sealed with the sealing element 29 (also shown by welding), is also disposed on the pipe 1 in the same axis as the branching pin 2.

On the one hand, the figures do not illustrate the fact that the screw 4 is a plug-in screw which seals the inserted probe in its tightened state and does not indicate the sealing means for replacing the screw after removal of the probe. Also, the clamp by means of which the probe 6 can be firmly attached to the tube 1 is not shown in the figure if the magnitude of the pressure in the tube 1 makes this necessary.

When actuating the measuring apparatus described above, when the measuring point is accessed, the plug screw (not shown) is first removed and the screw 4 acting as a sealing element is placed on the branch piece 2 or on the connection piece of the pipe closure assembly, and the plug is inserted. 4 3

Tighten 195 551 bolts slightly. Then open the pipe closure assembly 3, insert the probe as far as it will go, and tighten the screw 4 as needed. Meanwhile, in the valve housing 8 of the probe head 6, the pipe seals 16 and 17 and 19 are closed and the pipe seals 18 and 20 are open. Subsequently, a differential inanometer is connected to terminals 11a and 12a, a normal manometer to connector 13a, and a remote thermometer for electrical sensors 27, sensors 27a and 15a. After the transient phenomena associated with the connection 10, the pipe closures 16 and 17 are closed, the closures 18, 20 and the closure 19 are closed. Then the differential manometer measures the 1 in the tube. flow rate drops the pressure drop between holes 24 and 23 (this is in function of the amount of fluid to be flushed over the time unit), the normal manometer measures the absolute (local) pressure of the medium, and the telemetry measures the temperature of the fluid. 20

When using the apparatus of Fig. 4, during the construction of the net, branching mirrors 2 and 28 are placed opposite each other on the tube 1 using a suitable bore, as shown in the figure by way of welding. The branched miracle piece 28 is closed by securing the closure members 29 by welding in the example. The probe is inserted in the same manner as described with reference to FIG. I, except that the probe is lowered into the tube 1 to a designated starting point on the scale. This starting point corresponds to the situation where the bore 31 is at the same height as the wall of the tube 1. The instruments are also connected as described in connection with the operation of the apparatus shown in Figure 1. After measuring the velocity, the probe, after slightly loosening the 35 4 screws, is lowered sufficiently further using the scale, fixed in its new position, and the measurement is repeated. In the lower section of the tube 1, the portion of the probe below the bore 31 slides into the branching piece 28. Thus, the velocity values measured in the respective sections of diameter 40 provide information on the velocity distribution. However, if necessary, a temperature distribution curve can be obtained similarly.

The equipment, designed and operated as described above, is capable of providing quick, easy and inexpensive control measurements on a network-wide basis with relatively low investment costs and a relatively small number of instruments throughout the establishment of the public service network. §0

Claims (8)

I. Apparatus for conducting periodic inspection measurements on public service networks, characterized in that the perpendicular branching pieces (2), which are inserted through this sealing element, with sensing holes (23, 25, 24) are mounted at appropriate points in the network and have a barrier device (3). a probe (22) for carrying 5 probes (6), conductors (11, 12, 13, 14 and 15) from the bores and / or sensors (23, 24, 25; 27) to the probe (6), on the probe (6) there are 10 couplings (11a, 12a, 13a, 14a and 15a) coupled to the conduits (11, 12, 13, 14 and 15) directly or via pipe closure (16, 17, 19) Device according to claim 1, characterized in that the two branched pipe pieces of the pipeline (1) formed opposite to one another There are 15 (2 and 28), of which the lower branched miracle (28) is closed. Apparatus according to claim 1, characterized in that the pipe sealing fitting (3) located on the branching piece (2) is known as a pipe sealing fitting with a non-directional flow that provides a cross-sectional surface of the same cross section as the pipe. 4. Apparatus according to any one of claims 1 to 4, characterized in that two holes (23 and 24) of the probe (22) in the flow direction connected to the probe (6) are connected to a cavity (26) located in the flow direction in the neutral direction. furata (25). a conduit (13) connecting the interior of the cavity (26) with the probe 30 (6) and a sensor (27) in the cavity (26). 5. Apparatus according to any one of claims 1 to 3, characterized in that its sensor (27) is a thermocouple, 35 or a temperature-dependent electrical resistor connected to the probe (6) via electrical wires (14 and 15). 6. Apparatus according to any one of claims 1 to 3, characterized in that in the valve housing (8) connected to the probe (6) there is a pipe closure between the conductors (11 and 12) of the associated two bores (23 and 24) and the couplings (11a and 12a) thereto. (16 and 17), connecting the two wire line to a further pipe stop (18), and this leads to a further ^ö pipe stop (20) for connecting the conduit lefúvatóval (21). 7. Device according to any one of claims 1 to 3, characterized in that it is connected to the cavity (26) in the probe (22) and placed on the probe (6). It has a conduit (13) for a connection (13a) with a pipe closure (19). 8. A device according to any one of claims 1 to 4, characterized in that the probe (22) has a scale (30) for indicating the depth of penetration.