MEASURING DEVICE FOR A GAS LINE THROUGH WHICH A GAS STREAM ENRICHED WITH ODORING AGENT, BIOGAS, SYNTHESIS GAS AND / OR HYDROGEN

Description

[0001] The invention relates to a measuring device for a gas line through which a gas stream enriched with odorant, biogas and / or hydrogen flows, a device comprising the measuring device, and a use of the measuring device or device for at least one measurement in a gas line.

[0002] A measuring device with an inflow body and a wireless transmitter unit outside the gas line is known from WO 2020 / 104750 A1.

[0003] When supplying the general public with natural gas or natural gas mixtures consisting of natural gas-biogas and / or natural gas-hydrogen, which is essentially odorless in its processed state, it is required for safety reasons that the natural gas has a sufficient odor so that any leaks in the pipeline network can be subjectively perceived by humans.

[0004] If the processed natural gas or natural gas mixture does not exhibit a sufficient warning odor, it must be odorized according to legal regulations (see, for example, DVGW Worksheet G 280 for Germany). For this reason, it is common practice to add odorants to natural gas. Odorants are typically substances with a sufficient warning odor that impart a sulfur-like odor to the natural gas. A widely used odorant, for example, is tetrahydrothiophene (THT). Furthermore, low-sulfur and sulfur-free odorants have also been used for several years.

[0005] Natural gas is typically supplied odorant-free in gas transmission networks (long-distance transmission pipelines). Odorization is then performed by the gas network operator of the relevant gas distribution network when the gas is extracted from the gas transmission network and reduced to the pressure prevailing in the gas distribution network. For this purpose, a liquid odorant is typically added via an odorization system in a local gas pressure control and measurement system (GPRM system). The addition is dependent on the size of a standardized gas volume flow calculated from gas meter data as well as the gas temperature and pressure.A corresponding amount of odorant is fed by means of a pulse-controlled dosing pump to a feed device (also referred to as odorant nozzle or inoculation nozzle), which is often designed as an immersion tube-shaped odorant nozzle inserted into the line with an evaporation body onto which the odorant fed to the odorant nozzle is applied in liquid form.

[0006] Typically, the odorant is added in proportion to the gas flow. In Germany, for example, the odorant THT is added to the gas stream at a value of at least 10 mg / m3 of gas volume. Other odorants are subject to different, sometimes lower, limits. Care must be taken to ensure that a predetermined limit, for example 10 mg / m3 for THT, is not undercut throughout the entire gas distribution process. The odorant is typically added intermittently via the feed device inserted into the gas line, with the natural gas flowing through the gas line flowing around an inflow body of the feed device. The liquid odorant evaporates from the evaporator and is absorbed by the natural gas.

[0007] The object of the invention is to provide a measuring device which advantageously complements the feed device and which enables measurements in connection with the feed of the odorant into the gas stream in a simple and cost-effective manner.

[0008] The above object is achieved by the subject matter of the patent claims. In particular, the object is achieved by a measuring device according to claim 1, a device according to claim 13, and a use of the measuring device or device according to claim 15. Further advantages and details of the invention emerge from the subclaims, the description, and the drawings. Features and details disclosed in connection with the measuring device according to the invention naturally also apply in connection with the device according to the invention and the use according to the invention, and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is and can always be made to each other.

[0009] According to a first aspect of the invention, the object stated at the outset is achieved by a measuring device for a gas line through which a gas stream enriched with or mixed with odorant, biogas, synthesis gas, and / or hydrogen flows. The measuring device has an inflow body for positioning in the gas stream in the gas line. The inflow body is equipped with at least one sensor. The measuring device comprises a wireless transmitting unit configured to wirelessly transmit the measurement data from the at least one sensor to a wireless receiving unit located outside the gas line. The measuring device is configured to be inserted into a wall opening of a gas line section of the gas line, such that the inflow body extends into the gas line section.

[0010] The measuring device according to the invention allows, by means of the at least one sensor which is located in or on the inflow body, a reliable measurement in connection with the feeding of the odorant into the gas flow through a feed device.

[0011] The wireless transmission of the measurement data from at least one sensor enables the measuring device to be completely closed or encapsulated. In such a case, the measuring device can also be referred to as a measuring capsule. By dispensing with wired transmission of measurement data, a complex and expensive mechanical structure of the measuring device is avoided. This is because dispensing with cables for wired transmission not only reduces the risk of gas leakage in the area of ​​the wire guide from the measuring device to the outside of the gas line, but also avoids costly sealing of the wire guide. The measuring device can also be designed to be replaceable, as will be explained in more detail later. Replacing the measuring device without wiring for wired transmission of measurement data and with the wireless transmission proposed in the invention is significantly easier.

[0012] The measuring device is designed to be inserted into the wall opening of the gas line section of the gas line, so that the inflow body extends into the gas line section. For this purpose, the measuring device can have fastening means for attaching the feed device to the wall opening. If the measuring device has an odorant nozzle, as described in more detail below, the fastening means can be located, in particular, on the odorant nozzle.

[0013] The measuring device comprises a wireless transmission unit consisting of the wireless transmitter unit and, optionally, the wireless receiver unit. While the wireless transmitter unit is located on or in the upstream body and thus within the gas flow, the wireless receiver unit is arranged or can be arranged outside the gas line and thus outside the gas flow. The transmitter unit thus functions as an internal component, while the receiver unit functions as an external component. Inside and outside each refer to the gas line. Unlike the transmitter unit, the receiver unit can be arranged at any position outside the upstream body and the gas line within the wireless range between the transmitter unit and the receiver unit.While the measuring device is designed with the flow body and the transmitting unit as a single component, the receiving unit can be a physically separate component of the measuring device. It is also possible for the receiving unit to be connected to a remote data transmission unit to transmit the measurement data to a remote computer for analysis.

[0014] The sensor can be positioned accordingly in or on the upstream body directly in the gas stream or next to the gas stream in order to measure the gas stream directly or to take a measurement next to the gas stream. A combination of one or more sensors in the gas stream and one or more sensors next to the gas stream is also possible by positioning it accordingly in or on the upstream body. The arrangement of the sensor or sensors in or next to the gas stream can depend on the variable to be measured. For example, variables relating to gas composition can advantageously be measured directly in the gas stream by measuring individual gas components such as odorants, methane, other hydrocarbons, CO2, sulfur or hydrogen.

[0015] It can be provided that the at least one sensor is configured to measure a pressure, a temperature, a gas composition, and / or an odorant content in the gas stream. In this respect, the at least one sensor can be, for example, a pressure sensor, temperature sensor, infrared spectroscopy sensor, thermal conductivity sensor, optical sensor, or similar. The use of different sensors or sensor types in the measuring device is also possible. The use of combination sensors that can measure various of the aforementioned gas stream parameters is also possible.

[0016] It can also be provided that the at least one sensor has at least one self-sufficient energy supply unit. If there are multiple sensors, each sensor can have its own self-sufficient energy supply unit. However, it is also possible for several sensors to be assigned a common self-sufficient energy supply unit. A self-sufficient energy supply unit is understood to be an energy supply unit that can supply the sensor(s) with current or energy that is provided not from outside the gas line, but from within the gas line. The self-sufficient energy supply unit ensures, as does the avoidance of wired transmission of the measurement data, a simpler and more cost-effective design of the measuring device, whereby the risk of leakage in the measuring device can also be significantly reduced because gas tightness can be easily ensured.

[0017] It can be provided that the at least one self-sufficient energy supply unit is designed as a battery. This represents a particularly cost-effective design variant of the self-sufficient energy supply unit. The stored energy of the battery is limited, which makes it necessary to replace the battery after a certain period of use. However, as already mentioned, the measuring device is preferably designed to be replaceable, so that the measuring device can be easily replaced or at least removed from the gas line to replace the battery(ies).

[0018] Alternatively or additionally, it can be provided that the at least one autonomous energy supply unit is designed as a generator unit which is driven by the gas flow. The generator unit can be, for example, a vortex generator which is arranged on or in the inflow body. The vortex generator can convert vibrations of the inflow body into electrical energy, for which purpose the inflow body can be designed such that the gas flow excites the inflow body to vibrate. It is also possible for the generator unit to be designed as a flow generator which can generate electrical energy driven by the gas flow. In this case, the generator unit can be used directly to supply the sensor or sensors. However, a combination of generator unit or generator units with battery or batteries is preferably provided as autonomous energy supply units.The battery can then be recharged using the generator unit(s). This ensures that at least one sensor can always be supplied with power within the pipeline without external supply lines. Removing the measuring device from the gas line due to a depleted power supply battery is not necessary. The sensor's power supply can thus be self-sufficient.

[0019] In principle, wireless transmission of measurement data can be achieved via radio transmission. However, this limits the choice of material for the measuring device, because the measurement data would have to be transmitted wirelessly through the material of the measuring device, in particular an outer housing or an insert unit of the measuring device, or the gas line. For this purpose, the measuring device (and possibly also the gas line) could be made of a radio-permeable material, such as plastic. However, this is not a very stable solution, so a construction made of metal, particularly steel, is preferred. However, the measuring device, its housing, or its insert unit, forms a Faraday cage that prevents a radio connection.

[0020] Therefore, the wireless transmission unit can be configured to wirelessly transmit the measurement data using ultrasound. In other words, the wireless transmission unit can be designed as an ultrasonic transmission unit. This circumvents the problem of an unestablishable radio connection and ensures secure and cost-effective wireless transmission of the measurement data while simultaneously ensuring the most stable possible design of the measuring device or its housing or metal insert unit.

[0021] Alternatively or additionally, the wireless transmission unit can be configured to wirelessly transmit the measurement data via induction. In other words, the wireless transmission unit can be designed as an induction transmission unit. This circumvents the problem of an unestablishable radio connection and ensures secure and cost-effective wireless transmission of the measurement data while simultaneously ensuring the most stable design possible for the measuring device, its housing, or its operating unit.

[0022] Alternatively or additionally, it can be provided that the wireless transmission unit is configured for wireless transmission of the measurement data using light. In other words, the wireless transmission unit can be designed as a light transmission unit. A light channel is required for the transmission of light between the transmission unit and the reception unit. This can be formed through the measuring device, in particular a housing or insert unit surrounding it, and / or the gas line. For this purpose, corresponding bores can be made in the material of the measuring device or housing or insert unit, which are closed and sealed with light-permeable material, in particular glass or Plexiglas lenses. The transparent material can be elastically bonded to the bores. Glass or Plexiglas lenses, which can be optically shaped, enable the light to be directed or concentrated onto the corresponding light reception unit.This avoids the problem of the inability to establish a radio connection and ensures secure and cost-effective wireless transmission of the measurement data while at the same time ensuring the most stable design possible for the measuring device, its housing or its operating unit.

[0023] In principle, the inflow body can comprise a grid body or be formed by a grid body. The grid body can, in particular, be cylindrical. The grid body can, in particular, be designed in the form of a wire cage, in particular made of a wire grid. A grid body allows the desired mechanical properties of the inflow body to be achieved in order to withstand the gas flow in the gas line. The grid body also enables simple arrangement of the at least one sensor on or within it.

[0024] In particular, it can be provided that the measuring device has a feed device for feeding the liquid odorant into the gas stream, wherein the feed device has an odorant nozzle and an evaporation body in the upstream body, and wherein the odorant nozzle is designed to apply the liquid odorant to the evaporation body. In other words, a combined device is provided which combines the measuring device with the feed device. This device is referred to below as the measuring device, which has the feed device or its means, in particular the odorant nozzle and evaporation body. This makes it possible to provide a single device which enables odorization and measuring.

[0025] Such a feed device allows for reliable odorization of a gas stream in a gas line. The odorant, which flows from the odorant nozzle onto the evaporator during operation, is vaporized as it flows around or through the evaporator with the gas stream flowing in the gas line. It mixes with the gas stream, thus odorizing it.

[0026] The odorant nozzle is designed to supply the evaporation body with liquid odorant. For this purpose, the odorant nozzle has, in particular, an opening through which liquid odorant can be applied to the evaporation body during operation. Furthermore, the odorant nozzle preferably has a connection for connecting the odorant nozzle to an odorant supply. In this context, odorants are understood to mean, in particular, odorants according to DIN EN ISO 13 734.

[0027] The odorant nozzle can in particular be designed in the form of an immersion sleeve which is designed to be inserted into a wall opening of a gas line section and for this purpose preferably has fastening means, for example an external thread, for gas-tight fastening to the gas line section.

[0028] The odorant nozzle and the evaporator body preferably have complementary fastening means, allowing the evaporator body to be attached to the odorant nozzle. In this way, the evaporator body or the evaporator body can be exchanged. For example, the evaporator body can have an external thread, in particular an ISO thread, and the odorant nozzle a matching internal thread, or vice versa.

[0029] It can be provided that the inflow body has a grid body in which the evaporation body is arranged. This grid body can be the grid body already described. Furthermore, it can be provided that the grid body has a cup-shaped base part at the end of the grid body remote from the odorant nozzle, into which the evaporation body is preferably immersed, wherein the at least one sensor is arranged in the cup-shaped base part. Excess odorant can be collected by the cup-shaped base part so that the odorant does not drip into the gas line and contaminate it. The evaporation body is preferably immersed in the cup-shaped base part, in particular down to the bottom of the cup-shaped base part. In this way, the odorant collected in the cup-shaped base part can be supplied to the evaporation via the capillary action of the pores of the evaporation body.The sensor in the cup-shaped base part can determine how much odorant accumulates in the base part over a certain period of time. In this respect, the sensor can be designed as a fill level sensor for the base part, which determines the fill level of the base part with odorant. The fill level in the cup-shaped base part can be used to determine the evaporation rate of the odorant nozzle. In other words, the one sensor or sensors can be a liquid sensor for detecting liquid in the cup-shaped base part. The presence of liquid in the cup-shaped base part can indicate poor evaporation performance or an excessive supply of odorant. In addition to the fill level or liquid sensor, one or more further sensors can be arranged on the grid body above the base part in order to record further measured variables, in particular the measured variables already mentioned.This allows the grid body as a whole to be designed as a measuring probe with a variety of sensors for detecting different measured variables, both the gas in the gas stream and the odorant in the base part.

[0030] The inflow body preferably has a length of 100 - 400 mm and / or a diameter of 0.5 - 1 inch. While larger inflow bodies or those with a very small internal evaporation surface were common in the prior art, it has been found here that sufficient odorization of a gas stream can be achieved even with a significantly smaller inflow body geometry. This significantly simplifies handling of the feed device, which in particular enables a faster and therefore cost-reduced change of the feed device, especially when using the device described above. In addition, the smaller inflow body reduces the risk of unintentional leakage or spillage of odorant, especially when changing the feed device.The smaller size also allows the introduction of odorants into gas-flowing gas lines with very different nominal diameters, in particular from 50 - 1400 mm.

[0031] In one possible embodiment of the evaporation body, the evaporation body comprises an open-cell foam, in particular a metal or ceramic foam, or consists at least partially, preferably entirely, thereof. By using an open-cell foam for the evaporation body, it has a very large surface area, which greatly increases the evaporation performance and thus enables smaller inflow bodies. The metal or ceramic foam can in particular be an aluminum foam, a nickel-chromium foam (e.g. NC2733, NC1723, NC0610, NC1116), a nickel foam (e.g. NI 1116), an aluminum oxide foam (e.g. A1203 30, A1203 20, A1203 40), a silicon carbide foam (e.g. SiC 20), or combinations thereof. Such foams are available, for example, from Recemat BV (Dodewaards, NL) or Porosium GmbH (Coburg, DE).Oxidic foams, such as aluminum oxide foam, are chemically very stable compared to the odorants used in practice and are therefore preferred.

[0032] In another possible embodiment, the open-cell foam of the evaporation body has a pore density of 10-60 ppi, at least in some sections. This optimizes the evaporation performance for commercially available odorants, particularly those according to DIN EN ISO 13 734, and typical gas flows in gas lines, thus enabling a further reduction in the size of the inflow body.

[0033] In another possible embodiment, the evaporation body comprises multiple sections, wherein the individual sections have different pore densities and / or different average pore sizes. For this purpose, the evaporation body can, for example, comprise multiple elements stacked one above the other, each with different pore densities and / or different average pore sizes. Alternatively, a monolithic evaporation body can be used, in particular with different pore densities and / or average pore sizes in certain sections, for example by using an evaporation body produced by 3D printing.

[0034] The gas velocity of a gas stream in a gas line is not constant across the cross-section of the gas line, but exhibits a velocity distribution, with the velocity at the edge of the gas line typically differing from the velocity in the center of the gas line. By providing multiple sections with different pore densities, the respective pore density can be adapted to the gas velocity of the respective position in relation to the gas line cross-section. Accordingly, by providing multiple sections with different average pore sizes, the respective average pore size can be adapted to the gas velocity of the respective position in relation to the gas line cross-section.

[0035] In another possible embodiment, the pore density and / or the average pore size of the individual sections of the evaporation body increases or decreases at least in sections from the end of the evaporation body remote from the odorant nozzle toward the odorant nozzle. Such a gradient achieved across sections with different pore densities or average pore sizes allows the evaporation body to be adapted, for example, to the slower gas velocities toward the edge of the gas line.

[0036] In particular, it is possible to adapt the pore density and / or average pore size profile across the evaporator to the average gas velocity distributions prevailing in a gas pipeline in summer or winter. It has been observed that gas velocity distributions can differ significantly between summer and winter. For example, in winter, the larger gas volumes to be transported and the associated higher gas velocities can lead to increased turbulence in the gas pipeline, resulting in a different velocity distribution in the gas pipeline compared to summer, particularly at the edge of the gas pipeline.

[0037] Since the feed-in device described here allows for a quick change of the feed-in device, it is economically possible and sensible to switch, for example, twice a year between a feed-in device optimized for summer and one optimized for winter.

[0038] In another possible embodiment, the evaporation body is manufactured using 3D printing. In particular, the open-cell foam structure of the evaporation body can be printed directly using 3D printing. 3D printing further enables a pore density gradient and / or a pore size gradient, in particular as described above, in a monolithic evaporation body. Furthermore, 3D printing also enables the production of a self-supporting evaporation body. In this way, a grid body can be dispensed with. Alternatively, the grid body can also be printed directly. The evaporation body preferably has a 3D-printed thread, preferably an ISO thread, to connect the evaporation body to the odorant nozzle.Plastics, metals or other 3D-printable materials can be used to produce the evaporation body using 3D printing, provided they are resistant to the odorants to be used or the gases carried in the gas lines.

[0039] In another possible embodiment, the grid body is equipped with stabilizing struts. This allows the grid body to be stabilized so that it can mechanically withstand the gas flow in the gas line. In particular, this can reduce or increase vibrations caused by the flowing gas, which lead to mechanical stress or to increased energy generation by means of a vortex generator. Furthermore, by providing stabilizing struts, other parts of the grid body can be made thinner, for example, thinner wires can be used, thereby achieving a larger mesh size and / or a higher mesh proportion and thus better airflow to the evaporation body arranged in the grid body. In this way, the evaporation performance can be increased.

[0040] In another possible embodiment, several thicker longitudinal wires are provided as stabilizing struts. For example, the grid body can comprise a wire grid in which some longitudinal wires have a greater thickness. If the wire grid has, for example, 50 or 100 longitudinal wires, four of them can have a greater thickness. The thicker longitudinal wires are preferably evenly distributed around the circumference of the grid body; for example, with four thicker longitudinal wires, they are each offset from one another by a quarter of the circumference.

[0041] In a further embodiment, longitudinal tubes are provided as stabilizing struts. In particular, the grid body can comprise a wire mesh in which the longitudinal tubes are arranged like longitudinal wires. This can increase the rigidity of the grid body.

[0042] In combination with the measuring device and the feed device, the at least one sensor or one of several sensors can be one by means of which the condition and / or operation of the feed device can be monitored. The sensor or one of several sensors can, for example, be a wear sensor that monitors the wear of a component of the inflow body, for example the grid body. In this way, the feed device can be replaced in good time before it fails. The sensor or one of several sensors can also be a vibration sensor that measures the vibration of the inflow body in the gas flow. In this way, for example, a failure prediction can be made. The sensor or one of several sensors can also be a failure sensor, for example a fracture sensor, that monitors the failure of a component of the inflow body, for example the grid body.In this way, the feed device can be replaced promptly after a failure, for example, due to a pressure surge in the gas line. The wear or failure sensor can be arranged, in particular, on or in one of the stabilizing struts. The sensor or sensors can also be a flow velocity sensor that measures the flow velocity of the gas stream in the gas line. In this way, for example, the amount of odorant applied to the evaporator can be regulated depending on the flow velocity of the gas stream.

[0043] In addition, the measuring device can have external evaluation or monitoring electronics that are or can be connected to the receiving unit. This enables, for example, a connection of the sensor to local evaluation or monitoring electronics or, via interchangeable data transmission means, to remote evaluation or monitoring electronics. This enables, for example, central monitoring of various measuring devices and / or feed devices so that, for example, rapid repair can be carried out in the event of a failure. Furthermore, the data acquired by the at least one sensor can also be used to monitor, for example, the gas pipeline network, the gas composition, the odorant content in the gas stream, the completeness of the odorant evaporation, or the condition of the feed device.

[0044] It is also possible for the inflow body to be semi-cylindrical, with the rounded part of the inflow body being positioned particularly in the flow. It has been found that a semi-cylindrical shape of the inflow body on the flat back side creates turbulence in the gas flow, thereby achieving higher evaporation performance. Such a semi-cylindrical inflow body can be manufactured, particularly using 3D printing.

[0045] According to a second aspect of the invention, the object mentioned at the outset is achieved by a device having a measuring device according to the first aspect of the invention and an insert unit which has a housing with a gas line section through which gas can flow for installation in a gas line, wherein the measuring device is inserted or can be inserted into an opening in a wall of the housing in such a way that the inflow body extends into the gas line section.

[0046] When providing a feed device in the measuring device, as described above, a device for feeding a liquid odorant can be provided, which comprises a housing with an evaporation body extending therein, into which a liquid odorant can be introduced via an odorant nozzle in such a way that the evaporation body is wetted and promotes the evaporation of the odorant.

[0047] It can be provided that the insert unit has a valve body that can be moved from a first open position to a second closed position. The valve body closes the gas line section in the second position and releases it in the first position. The valve body forms a removal lock for the measuring device with the housing in the second position. This allows for easy removal of the measuring device and thus easy replacement of the measuring device.

[0048] Accordingly, the housing can simultaneously serve as a removal lock for the measuring device, in particular the inflow body, and optionally for the feed device and odorant nozzle, as well as the evaporation body. The inflow body can extend essentially over the entire clear width of the free housing cross-section within the housing.

[0049] It is possible for the sampling lock for the measuring device, in particular the inflow body and optionally for the odorant nozzle and also the evaporation body, to be formed by a single valve body, which simultaneously blocks the cross-section of the gas line. This eliminates the need to shut off the housing of the device for feeding the liquid odorant on both sides of a connection to the gas line.

[0050] The valve body can have a lock chamber that interacts with a valve seat of the housing such that the valve seat seals the lock chamber when the valve body is in the second, closed position. The lock chamber can, for example, be a cavity in the valve body that is dimensioned to accommodate the inflow body (optionally with evaporation body) and optionally also parts of the odorant nozzle.

[0051] It is also possible to provide a device for pre-relieving the lock chamber. As a pre-relieving device for pre-relieving the lock chamber, the odorant nozzle, for example, can have a pre-relieving valve, which is expediently arranged on a part of the odorant nozzle that extends outside the housing. This makes it possible, after blocking the free cross-section of the housing, to first relieve the lock chamber of the pressure prevailing in the housing, so that the housing can then be opened from the outside for removal of the measuring device.

[0052] The inflow body with the at least one sensor, and optionally the evaporation body, can be arranged, for example, in an immersion sleeve or an immersion tube, in particular the odorant nozzle. The inflow body with the evaporation body and the at least one sensor, and the odorant nozzle, can be designed, for example, as a single, manageable unit in the form of a cartridge.

[0053] In one possible embodiment of the device, the valve body is designed as a ball valve body having a flow channel. The upstream body, with or without evaporation body, and / or the odorant nozzle, can, for example, pass through a passage in one pole of the ball valve body. Such a ball valve body expediently comprises two diametrically opposed poles that define the axis of symmetry and axis of rotation of the ball valve body. A control shaft for actuating the ball valve body can engage one pole, and a passage can be provided at the opposite pole into which the upstream body, in particular the evaporation body, and / or the odorant nozzle are immersed. The ball valve body can expediently be actuated via a ball valve that is attached to a control shaft passing through the housing.

[0054] In an alternative embodiment of the device, the valve body can be designed as a slide valve, in particular as a wedge valve, which can be actuated via a spindle drive.

[0055] In a further variant of the device, it can be provided that the housing has a first, second and third pipe outlet, that the valve body releases the third pipe outlet in the second closed position and that the third pipe outlet is closed with an inspection cover. In this variant of the device, the inspection cover delimits the extraction lock with the housing. The inspection cover can, for example, be provided with a sight glass that allows visual inspection of the extraction lock, the inflow body or the odorant nozzle. The first, second and third pipe outlet can all have approximately the same cross-section, wherein preferably the first and second pipe outlet form the gas line section of the device through which gas can flow. The third pipe outlet provides a relatively large access opening to the extraction lock.This makes it possible to insert a component, such as the odorant nozzle or the flow body, into the device from the side. This provides a larger cross-section for inserting components into the device. Pre-depressurization of the lock chamber can be achieved in the manner described above or via a connection located in the area of ​​the removal lock.

[0056] According to a third aspect of the invention, the object mentioned at the outset is achieved by using a measuring device according to the first aspect of the invention or a device according to the second aspect of the invention for at least one measurement in a gas line.

[0057] As already described above, different measured variables can be recorded during the measurement by one, several, in particular different, or combined sensors. As explained above, the sensor or sensors can be arranged on the inflow body, in particular on the grid body, and / or arranged in a cup-shaped base part of the grid body. Possible measured variables relate to the gas flow and therefore include, for example, the pressure, the temperature, the gas composition and / or the odorant content, the fill level or the amount of liquid in the base part and / or wear or failure of the inflow body, in particular the grid body.

[0058] The invention is explained in more detail below with reference to exemplary embodiments, based on the accompanying drawings. All features apparent from the claims, the description, or the figure, including structural details, may be essential to the invention both individually and in any combination. They show: Fig. 1 a schematic representation of a device for odorizing a gas stream in a gas line, Fig. 2 a first embodiment of a feed device, Fig. 3 the embodiment of Fig. 2 in an installation situation and an embodiment of a device, Fig. 4a - a flow body of a further embodiment of a feed device, Fig. 5a - a flow body of a further embodiment of a feed device, Fig. 6a - 6b flow body of a further embodiment of a feed device, Fig. 7 a cross section of a flow body of a further embodiment of a feed device, Fig. 8a - a grid body of a flow body of a further embodiment of a feed device, Fig. 9a - a grid body of a flow body of a further embodiment of a feed device, Fig. 10 an embodiment of a measuring device, and Fig. 11a - a further embodiment of a device.

[0059] Elements with the same function and mode of action are listed in the Figuren 1 bis 11 each provided with the same reference symbols.

[0060] Figur 1 shows the basic structure of a device for odorizing a gas stream in a schematic representation. In Figur 1 A gas line section 1 of a gas line 2 is shown, which is connected downstream of a gas meter 3 in the direction of gas flow. The odorization device can be arranged, for example, in a gas pressure meter (GDRM) system of a local gas distribution network. In the present case, natural gas is supplied at a reduced pressure from a high-pressure transport network to the gas pressure distribution network in the gas line 2.

[0061] In the flow direction behind the gas meter 3, a liquid odorant 60 (see Fig. 3 ), for example in the form of THT, is introduced into the gas line 2 via a feed device 4. For this purpose, the odorant is taken from an odorant container 5 and fed to the feed device 4 via a metering pump 6. The metering pump 6 is connected to the gas meter 3 via a control unit 7. The gas meter 3 supplies the control unit 7 with information about the gas volume flow in the gas line 2 and the control unit 7 controls the metering pump 6 such that the metering pump 6 delivers a quantity of odorant to the feed device 4 that is adapted to the gas volume flow. To control the metering pump 6, a flow meter 9 can be provided that measures the odorant volume flow pumped by the metering pump 6. Furthermore, a level meter 10 can be provided to monitor the fill level in the odorant container 5.A check valve 11 is preferably provided between the dosing pump 6 and the feed device 4 in order to prevent gas flow from the gas line 2 to the odorant container 5.

[0062] The Figuren 2 and 3 now show a first embodiment of a feed device 22. Fig. 2 shows a view of the individual parts of the feed device 22 and Fig. 3 the installation situation in a gas line section 24. The feed device 22 has an odorant nozzle 26 and a flow body 28. The flow body 28 has a cylindrical grid body 30, at one end 32 of which an external thread 34 is provided, with which the grid body 30 can be screwed into a complementary internal thread 36 of the odorant nozzle 26. Alternatively, the flow body 28 can also be designed with an internal thread at one end 32, which can be screwed onto a complementary external thread of the odorant nozzle 26. At its end 38 opposite the end 32, the grid body 30 has a cup-shaped base part 40. An evaporation body 42 made of an open-cell foam, for example, an open-cell metal or ceramic foam, is arranged in the grid body 30.

[0063] The odorant nozzle 26 is designed in the form of an immersion sleeve so that it can be inserted into a wall opening 44 of the gas line section 24 in order to position the flow body 28 screwed to the odorant nozzle 26 in a gas stream 46 flowing in the gas line section 24. Fig. 3 shows the feed device 22 in assembled state and after installation in the gas line section 24.

[0064] The odorant nozzle 26 preferably has fastening means which enable gas-tight insertion and fastening of the odorant nozzle 26 to the gas line section 24, as in Fig. 3 shown. For this purpose, the odorant nozzle 26 is provided with, for example, an external thread 50 corresponding to an internal thread 48 of the wall opening 44, as well as a flange 52 for external engagement with the gas line section. The flange can, for example, have a circumferential sealing ring 54 on its underside.

[0065] Furthermore, the odorant nozzle 26 has a connecting piece 56 for connecting an odorant supply line 58, so that during operation, odorant 60 is fed from the connected odorant supply line 58 through a channel 122 running from the connecting piece 56 through the odorant nozzle 26 to an opening 44 (see Fig. 10 ) reaches the evaporation body 42.

[0066] Due to its open-cell sponge structure, the evaporation body 42 has a very large internal surface over which the odorant 60 that reaches the evaporation body 42 during operation is distributed. The pore density of the evaporation body 42, at 10-60 ppi, is also optimized for the typically used odorants 60 (e.g., tetrahydrothiophene) and the typical gas flow velocities in gas lines 2, so that a high evaporation performance is achieved with the feed device 22.

[0067] Due to its high evaporation capacity, the inflow body 28 can be designed very compactly and has a length between 50 and 600 mm and a diameter in the range of 0.5 to 1 inch. This makes the feed device 22 easier to handle and can also be used in gas lines 2 with smaller nominal diameters.

[0068] The cup-shaped base part 40 provided at the lower end 38 of the grid body 30 ensures that any excess odorant 60, for example, due to excessive odorant supply or a reduced gas flow 46, does not drip onto the wall of the gas line section 24 and contaminate it, but is collected in the cup-shaped base part 40. The evaporation body 42 is immersed in the cup-shaped base part 40 to the bottom, so that the accumulating odorant 60 is sucked back into the evaporation body 42 by capillary forces and can evaporate.

[0069] Fig. 3 shows the installation situation of the feed device 22 in the gas line section 24. The gas line section 24 can be, for example, a possibly longer gas line 2, a short pipe section, for example provided with connecting flanges 66 for installation in a gas line 2 or a pipe fitting (see also the example in Fig. 11 ). Regardless of the specific design, the gas line section 24 with the wall opening 44 represents an insert unit 68, and the entirety of the insert unit 68 and the feed device 22 inserted therein represents a device 70 for feeding a liquid odorant 60 into a gas stream 46 flowing through a gas line 2.

[0070] The Figuren 4a-b show a flow body 78 of a further embodiment of a feed device 22. Fig. 4a shows a longitudinal section and Fig. 4b shows a cross section corresponding to the Fig. 4a section plane designated IVb. The inflow body 78 has a similar structure to the inflow body 28 of Fig. 2 Corresponding components are therefore provided with the same reference numerals and reference is made to the above description. Fig. 2 The odorant nozzle 26 of the further embodiment of the feed device 22 has an identical structure to the odorant nozzle 26 of Fig. 2 .

[0071] The inflow body 78 differs from the inflow body 28 in that Fig. 2 that the evaporation body 80 of the inflow body 78 consists of a plurality of stacked elements 82a-f made of open-cell foam with different pore densities and / or different average pore sizes. In this way, it can be taken into account that the velocity of a gas flow in a gas line is not constant across its cross-section, but exhibits a velocity distribution.

[0072] By stacking the elements 82a-f, the respective pore density and / or the respective pore sizes can be better adapted to the different gas velocities at the respective locations in the gas line cross-section, so that an overall better evaporation performance is achieved. For example, the velocity of a gas stream 46 at the wall of the gas line 2 is typically lower than in the center of the cross-section of the gas line. For this purpose, the elements 82a-f can, for example, be stacked such that the (possibly average) pore density and / or the average pore size of the individual elements decreases or increases from element 82a to element 82f. The elements 82a-f can, in particular, also be stacked such that the pore density and / or average pore size is adapted to the respective position of the individual elements 82a-f in a gas line 2 with a predetermined nominal diameter. In an arrangement according to Fig. 3 For example, the elements 82a-f could be arranged such that the elements 82c-d arranged in the middle of the gas line 2 in this case have the highest or lowest pore density and the pore density of the remaining elements 82a,b,e,f decreases or increases towards the respective ends of the inflow body 78.

[0073] The Figuren 5a-b show a flow body 88 of a further embodiment of a feed device. Fig. 5a shows a longitudinal section and Fig. 5b a cross-section corresponding to the Fig. 5a cutting plane designated Vb.

[0074] The flow body 88 has a similar structure to the flow body 28 of Fig. 2 or the flow body 78 from Fig. 4a-b Corresponding components are therefore provided with the same reference numerals and reference is made to the above description. Fig. 2 and 4a-b The odorant nozzle 26 of the further embodiment of the feed device 22 has an identical structure to the odorant nozzle 26 of Fig. 2 .

[0075] Like the inflow body 78, the inflow body 88 has an evaporation body 90 whose average pore density varies in the longitudinal direction of the evaporation body 90. However, unlike the evaporation body 80, this is not achieved by stacking individual elements 82a-f on top of one another. Instead, the evaporation body 90 is manufactured in one piece. Such a one-piece evaporation body 90 with a pore density varying in the longitudinal direction can be produced, for example, by 3D printing. For example, metallic foam structures with varying pore density can be produced using 3D printing processes such as selective laser melting or sintering. In a corresponding manner, an inflow body 88 with an average pore size varying in the longitudinal direction can also be manufactured.

[0076] The Figuren 6a-b show a flow body 94 of a further embodiment of a feed device 22. Fig. 6a shows a longitudinal section and Fig. 6b shows a cross section corresponding to the Fig. 6a sectional plane designated VIb. The odorant nozzle 26 of this embodiment of the feed device 22 has an identical structure to the odorant nozzle 26 of Fig. 2 .

[0077] The inflow body 94 differs from the inflow bodies 28, 78, and 88 in that it does not have a separate grid body 30, but is formed by a self-supporting, one-piece evaporation body 96. Such a one-piece, self-supporting evaporation body 96 can be manufactured using 3D printing, for example, by means of selective laser melting or sintering. In particular, the evaporation body 96 can also be provided with a pore density and / or average pore size that varies in the longitudinal direction. Preferably, the evaporation body 96 is directly provided with an external thread 34 for attachment to the odorant nozzle 26 during production using 3D printing, so that the evaporation body 96 can be easily screwed to the odorant nozzle 26.

[0078] Fig. 7 shows a cross-section of a flow body 94 of a further embodiment of a feed device 22 in a schematic view. The flow body 94 of this embodiment can basically have a structure like the flow body 28 from Fig. 2 , the flow body 78 from Fig. 4a-b , the flow body 88 from Fig. 5a-b or the flow body 94 from Fig. 6a-b wherein the cross section 104 of the inflow body - unlike the circular cross sections of the inflow bodies 28, 78 (see Fig. 4b ), 88 (see Fig. 5b ) and 94 (see Fig. 6b ) - is semicircular. In particular, the grid body 30 and the evaporation body 42, 80, 90, 96 of the inflow body 28, 78, 88, 94, 132 arranged therein or, in particular in the case of a self-supporting evaporation body 42, 80, 90, 96 without grid body 30 as in Fig. 6a-b , only the evaporation body 108 has a semicircular cross-section 104.

[0079] For use, the cross-section 104 of the inflow body 94 is aligned such that the rounded part of the cross-section 104 points in the direction of the gas flow 46. At the sharp edges of the cross-section 104 towards the flat area on the side facing away from the gas flow 46, turbulence occurs, which improves the evaporation performance of the inflow body 94.

[0080] The Fig. 8a-b show a grid body 108 of an inflow body 28, 78, 88, 94 of a further embodiment of a feed device 22. Fig. 8a shows a view from the side and Fig. 8b a cross-section corresponding to the Fig. 8a sectional plane designated VIIIb. The grid body 108 can, for example, be used instead of the grid body 30 in one of the previously described flow bodies 28, 78 and 88. Like the grid body 30, the grid body 108 is provided at one end with an external thread 34 and at the other end preferably with a cup-shaped bottom part 40 (in Fig. 8a not shown for clarity).

[0081] The grid body 108 comprises a grid of thin longitudinal wires 110 and transverse wires 112, which form a grid. Four longitudinal wires 114 distributed around the circumference are thicker than the remaining longitudinal wires 110 and thus represent stabilizing struts of the grid body 108. These stabilizing struts ensure sufficient stability of the grid body 108 to withstand the gas flow 46 in the gas line section 24, even with a small thickness of the longitudinal wires 110. The resulting small thickness of the longitudinal wires 110 and transverse wires 112 increases the mesh portion of the grid body 108, i.e. the area portion of the mesh compared to the total area including the longitudinal and transverse wires, so that the gas flow can flow through the grid body 108 with less resistance, which on the one hand can increase evaporation performance and on the other hand can reduce vibrations.

[0082] The Fig. 9a-b show a grid body 118 of an inflow body of a further embodiment of a feed device 22. Fig. 9a shows a view from the side and Fig. 9b a cross-section corresponding to the Fig. 9a sectional plane designated IXb. The grid body 118 can, for example, be used instead of the grid body 30 in one of the previously described inflow bodies 28, 78 and 88. Like the grid body 30, the grid body 118 is provided at one end with an external thread 34 and at the other end preferably with a cup-shaped bottom part 40 (in Fig. 9a not shown for clarity).

[0083] The grid body 118 has a similar structure to the grid body 108 of Fig. 8 , wherein corresponding elements are provided with the same reference numerals and reference is made to the above description in this regard. The grid body 118 differs from the grid body 108 in that, instead of the thicker longitudinal wires 114, longitudinal tubes 120 are arranged in the grid body 118 as stabilizing struts. The longitudinal tubes 120 increase the rigidity of the grid body 118. Furthermore, the channels 122 running in the longitudinal tubes 120 can be used for sensors or lines.

[0084] Fig. 10 shows a further embodiment of a feed device 22. The feed device 130 has a similar structure to the feed device 22 from Fig. 2 , wherein corresponding elements are provided with the same reference numerals and in this respect refer to the above description Fig. 2 The feed device 130 differs from the feed device 22 in that the inflow body 132 of the feed device 130 comprises the grid body 118 made of Fig. 9 with the longitudinal tubes 120. The longitudinal tubes 120 are in Fig. 9 For the sake of illustration, the cross-section is shown with an exaggerated size.

[0085] Furthermore, the inflow body 132 is equipped with several sensors 202, 203, a wireless transmitting unit 206, a self-sufficient energy supply unit 204, a wireless receiving unit 208 and lines 210. The aforementioned units together form a measuring device 200, which in this case also includes the feed device 22 with the evaporation body 42, 80, 90, 96 and the odorant nozzle 26. In this respect, in the Fig. 10 The device shown can also be referred to as a combined feed and measuring device, hereinafter referred to as measuring device 200. This allows for odorization and measurement.

[0086] Each of the Fig. 2 bis 9 The feed devices 4, 22 or flow bodies 28, 78, 88, 94 shown can also be equipped in the same way with several or all of the above-described components 202, 203, 204, 206, 208, 210 of the measuring device 200 so that they are also designed as measuring devices 200.

[0087] Alternatively, it is possible to design the measuring device 200 separately from the feed device 4, 22, 130, which is not shown graphically here. For this purpose, the measuring device 200 can be made of Fig. 10 the evaporation body 42, 80, 90, 96 and the odorant nozzle 26 can be omitted. In this case, odorization can be carried out separately by a feed device 4, 22, 130 in the gas line 2 and measurement can be carried out by a measuring device 200 in the gas line 2.

[0088] The sensor 203 arranged in the cup-shaped base part 40 can, for example, be a liquid sensor or fill level sensor, which can be used to determine whether odorant is accumulating in the cup-shaped base part 40. Such a sensor 203 can, for example, be used to regulate the odorant supply.

[0089] The optional additional or alternative sensor 202 is configured to measure a pressure, a temperature, a gas composition, and / or an odorant content in the gas stream 46. It is also possible for additional sensors 202 (not shown) to be configured for this purpose and arranged on the grid body 118. For example, it is possible for such an additional sensor 202 to be arranged on or in one of the longitudinal tubes 120 and to be configured, for example, as a vibration sensor or as a break sensor. In this way, the feed device 130 can be monitored for mechanical stress or failure, so that it can be replaced at short notice in the event of imminent or actual failure.

[0090] The inflow body 132 or grid body 118 equipped with the sensors 202, 203 further comprises the self-sufficient energy supply unit 204, which can be designed, for example, as a generator unit, a battery, or a combination of the two. The self-sufficient energy supply unit 204 ensures the energy or power supply of the sensors 202, 203. For this purpose, the self-sufficient energy supply unit 204 is connected to the sensors 202, 203 via the lines 210. In this case, the lines 210 run, for example, through a channel 122 of a respective one of the longitudinal tubes 120. Furthermore, the sensors 202, 203 are connected to the wireless transmission unit 206 via the lines 210 or, alternatively, other lines (not shown). The wireless receiving unit 208 corresponding to the wireless transmitting unit 206 is arranged outside the gas line 2, in particular the insert unit 68, in this case by way of example on the connecting piece 56.

[0091] The wireless transmitter unit 206 and the wireless receiver unit 208 form a wireless transmission unit of the measuring device 200, which is designed to transmit the measurement data from the sensors 202, 203 to the outside of the gas line 2 or the insert unit 68. Overall, the insert unit 68 can be made of a metallic material, so that it forms a Faraday cage and radio transmission of the measurement data is not an option. Wired transmission carries the risk of possible gas leakage in the respective feedthroughs and is comparatively complex in design. Therefore, transmission of the measurement data by means of ultrasound, induction, or light is preferred, for which the transmitter unit 206 and the receiver unit 208 can be designed accordingly.The measurement data can be transmitted to a remote computer for evaluation via a further remote data transmission unit (not shown), which can be connected to the receiving unit 208.

[0092] The Figuren 11a-b show a further embodiment of a device 150. The device 150 has a measuring device 200 with a feed device 152, which, for example, like the one in Fig. 2 shown feed device 22 or one of the other previously described feed devices 4, 22, 130 and which with reference to Fig. 10 explained components of the measuring device 200, whereby for the sake of clarity only the sensors 202, 203 are shown in the Fig. 11a-b are shown. Furthermore, the device 150 has an insert unit 154, which has a housing 156 with a gas-flowable gas line section 158. The feed device 152 is inserted into an opening 160 in a wall of the housing 156, so that the flow body 28 extends into the gas line section 158.

[0093] The insert unit 154 also has a valve body 162 which can be moved by means of a lever 164 from a first open position (in Fig. 11a shown) into a second closed position (in Fig.11b shown), wherein the valve body 162 closes the gas line section 158 in the second position and releases it in the first position, and wherein the valve body 162 forms a removal lock 166 for the measuring device 200 with the housing 156 in the second position. In the present case, the valve body 162 is designed, for example, as a ball valve body and the lever 164 is designed, for example, as a ball valve.

[0094] The device 150 allows the simple and quick removal or replacement of the removal lock 166, since the valve body 162 simultaneously blocks the gas flow 46 in the gas line section 158 and enables the removal or replacement of the measuring device 200.

[0095] For light transmission of the measurement data by means of the wireless transmission unit 206, the valve body 162 can have a light channel (not shown) which is inclined, in particular substantially orthogonal, to the Fig. 11a visible through-bore of the valve body 162 for opening the gas line section 158. The light channel thus formed can be used to transmit the light signals with the measurement data of the sensors 202, 203 from the gas flow 46 when the valve body 162 is in the first open position of the Fig. 11a Furthermore, the insert unit 154, in particular the housing 156, can have a sight glass or viewing window (not shown) which allows a view of the inflow body 28, 78, 88, 94, 132. The light channel can be configured such that it leads through the sight glass or viewing window to the receiving unit 208. This allows both a visual inspection from the outside through the sight glass and avoids the need for a further bore in the housing 156 for the light channel to pass through. The light channel can be sealed gas-tight on the valve body 162. The light channel can be formed, for example, by elastically bonding a lens, in particular made of glass or Plexiglas, to the valve body 162. Bezugszeichenliste

[0096] 1, 24, 158Gas line section 2Gas line 3Gas meter 4, 22, 130, 152Feed device 5Odorant container 6Dosing pump 7Control unit 9Flow meter 10Level gauge 11Check valve 26, 142Odorant nozzle 28, 78, 88, 94, 132Inlet body 30, 108, 118Grille body 32, 38Ends of the grille body 34External thread of the grille body 36Internal thread of the odorant nozzle 40Bottom section 42, 80, 90, 96Evaporation body 44, 160Wall opening 46Gas flow 48Internal thread of the gas line section 50External thread of the odorant nozzle 52Flange 54Sealing ring 56Connecting piece 58Odorant supply line 60Odorant 66Connecting flange 68, 154Insert unit 70, 150Device 82a-fStacked elements made of open-cell foam 104Cross-section 110, 114Longitudinal wire 112Cross-wire 120Longitudinal tube 122Channel 156Housing 162Valve body 164Lever 166Discharge lock 200Measuring device 202, 203Sensor 204Autonomous power supply unit 206Wireless transmitter unit 208Wireless receiver unit 210Line

Claims

1. Measuring device (200) for a gas line (2) through which a gas stream (46) enriched with odorizing agent (60), biogas, synthesis gas and / or hydrogen flows, wherein - the measuring device (200) has an inflow body (28, 78, 88, 94, 132) for positioning in the gas stream (46) in the gas line (2), - the inflow body (28, 78, 88, 94, 132) is equipped with at least one sensor (202, 203), - the measuring device (200) comprises a wireless transmitting unit (206) which is set up for wireless transmission of the measured data of the at least one sensor (202, 203) to a wireless receiving unit (208) located outside the gas line (2), the wireless transmitting unit (206) being arranged on or in the inflow body (28, 78, 88, 94, 132), and - the measuring device (200) is set up to be inserted into a wall opening (44, 160) of a gas line section (1, 24, 158) of the gas line (2), so that the inflow body (28, 78, 88, 94, 132) extends into the gas line section (1, 24, 158).

2. Measuring device (200) according to claim 1, wherein the at least one sensor (202, 203) is adapted to measure a pressure, a temperature, a gas composition and / or an odorant content in the gas stream (46).

3. Measuring device (200) according to claim 1 or 2, wherein the at least one sensor (202, 203) comprises at least one self-sufficient energy supply unit (204).

4. Measuring device (200) according to claim 3, wherein the at least one self-sufficient energy supply unit (204) is designed as a battery.

5. Measuring device (200) according to claim 3 or 4, wherein the at least one self-sufficient energy supply unit (204) is designed as a generator unit which is driven by the gas stream (46).

6. Measuring device (200) according to one of the preceding claims, wherein the wireless transmission unit (206) is set up for wireless transmission of the measurement data by means of ultrasound.

7. Measuring device (200) according to one of the preceding claims, wherein the wireless transmission unit (206) is set up for wireless transmission of the measurement data by means of induction.

8. Measuring device (200) according to one of the preceding claims, wherein the wireless transmission unit (206) is set up for wireless transmission of the measurement data by means of light.

9. Measuring device (200) according to one of the preceding claims, wherein the inflow body (28, 78, 88, 94, 132) has a grid body (30, 108, 118) on which the at least one sensor (202, 203) is arranged.

10. Measuring device (200) according to one of the preceding claims, wherein the measuring device (200) comprises a feed device (4, 22, 130, 152) for feeding the liquid odorizing agent (60) into the gas stream, wherein the feed device (4, 22, 130, 152) comprises an odorizing nozzle (26, 142) and an evaporation body (42, 80, 90, 96) in the inflow body (28, 78, 88, 94, 132), and wherein the odorant nozzle (26, 142) comprises an evaporation body (42, 80, 90, 96) in the inflow body (28, 78, 88, 94, 132), 142) and an evaporating body (42, 80, 90, 96) in the inflow body (28, 78, 88, 94, 132), and wherein the odorizing nozzle (26, 142) is designed to act on the evaporating body (42, 80, 90, 96) with the liquid odorizing agent (60).

11. Measuring device (200) according to claims 9 and 10, wherein the evaporation body (42, 80, 90, 96) is arranged in the grid body (30, 108, 118).

12. Measuring device (200) according to claim 11, wherein the grid body (30, 108, 118) at the end of the grid body (30, 108, 118) remote from the odorizing nozzle (26, 142) has a cup-shaped bottom part (40) into which the evaporation body (42, 80, 90, 96) is preferably immersed, wherein the at least one sensor (202, 203) cup-shaped base part (40), into which the evaporation body (42, 80, 90, 96) preferably dips, wherein the at least one sensor (202, 203) is arranged in the cup-shaped base part (40).

13. Device (70, 150) having a measuring device (200) according to one of the preceding claims and an insert unit (154) which has a housing (156) with a gas line section (158) through which gas can flow for installation in a gas line, wherein the measuring device (200) is inserted or can be inserted into an opening (160) in a wall of the housing (156) in such a way that the inflow body (28, 78, 88, 94, 132) extends into the gas line section (158).

14. Device (70, 150) according to claim 13, wherein the insert unit (154) has a valve body (162) which can be moved from a first open position into a second closed position, wherein the valve body (162) closes the gas line section (158) in the second position and releases it in the first position, and wherein the valve body (162) forms an extraction lock (166) for the measuring device (200) with the housing (156) in the second position.

15. Use of a measuring device (200) according to one of claims 1 to 12 or a device (70, 150) according to claim 13 or 14 for at least one measurement in a gas line (2).