ARRANGEMENT WITH ELECTRICALLY CONDUCTIVE CONNECTIONS, A SHEAR AND A ROD-SHAPED INSULATOR

Description

background

[0001] The present disclosure relates to an arrangement with leads for sensor elements. In particular, the present disclosure relates to such an arrangement with leads for use in a combustion device. The sensor element can, for example, record a gas concentration, in particular an oxygen concentration.

[0002] Industrial processes utilize energy conversion through combustion to generate steam and / or heat for an industrial process. During operation, a flame from a heat generator burns in the combustion chamber of a combustion device. The heat generator converts the thermal energy of the hot combustion gases into another fluid, such as water. This heated water is then used, for example, to operate a hot water heating system and / or to heat drinking water. In another embodiment, the thermal energy of the hot fuels and / or combustion gases can be used to heat a material, for example, in an industrial process. In yet another embodiment, the heat generator is part of a combined heat and power (CHP) plant, for example, an engine within such a plant. Furthermore, the heat generator can be used to heat water in a plant for the production of lithium and / or lithium carbonate.The exhaust gases are discharged from the combustion chamber, for example, via an exhaust stack and / or a flue and / or a chimney. A sensor element is installed in the exhaust stack and / or flue and / or chimney, which can, for example, record the oxygen concentration.

[0003] Some such processes involve the operation of a furnace or boiler. While combustion represents a cost-effective energy conversion, there is often an effort to maximize combustion efficiency within a process. Maximizing combustion efficiency is, among other things, a consequence of the resulting exhaust gases and / or flue gases leaving the system. These exhaust gases and / or flue gases are sometimes subject to regulations regarding the emission of harmful gases. Thus, one goal of optimization is to maximize the combustion efficiency of existing furnaces and / or boilers. This is accompanied by a reduction in the production of greenhouse gases and other harmful byproducts.

[0004] Another objective is optimization for various fuels and / or fuel gases. This particularly concerns fuels and / or fuel gases containing hydrogen gas. Ideally, fuels and / or fuel gases containing more than 20% hydrogen by volume at 293 Kelvin are suitable. In some cases, the hydrogen gas content at 50% or even 70% by volume at 293 Kelvin is achievable.

[0005] Combustion efficiency can be optimized by controlling the oxygen content in the exhaust gases and / or flue gases from a combustion process. This largely ensures the oxidation of combustion byproducts.

[0006] In-situ or in-process analyzers can be used to monitor, optimize, and / or control an ongoing combustion process. Common analyzers include a sensor unit. This sensor unit is heated to high temperatures and operates directly in or near the combustion zone of the furnace or boiler.

[0007] Common analytical instruments typically use a zirconium dioxide-based oxygen sensor. The oxygen sensor is located at one end of a probe that is inserted into a flue gas stream. As the exhaust gas and / or flue gas flows into the analyzer, it diffuses through a filter or diffuser to the vicinity of the zirconium dioxide-based oxygen sensor. There are no pumps or other flow-inducing devices used to direct the sample flow into the analyzer. Instead, the gas passively passes through the diffuser. The sensor provides an electrical signal indicating the amount of oxygen present in the exhaust gas and / or flue gas.

[0008] The zirconium dioxide-based oxygen sensor provides potentiometric indication. Potentiometric indication is considered a reliable method for measuring oxygen levels in combustion environments. It enables efficient and / or safe process control. Typically, a single probe is inserted into the process, for example, into the exhaust stack and / or flue gas stack and / or chimney. Percentage oxygen measurement is used to optimize combustion efficiency in small boilers and / or furnaces. In large plants, operators often encounter exhaust gas and / or flue gas stratification. This stratification comprises numerous layers, each with a different oxygen concentration.

[0009] To obtain stratification information, operators can install multiple probes in the exhaust stack and / or flue gas stack and / or chimney for efficient and safe operation. In some cases, up to sixteen such probes can be installed.

[0010] High demands are placed not only on the sensor unit itself, regarding temperature resistance and resistance to chemical decomposition, but also on the connecting cables to the sensor unit. In particular, cables that electrically connect to the sensor unit must be temperature-resistant and resistant to chemical decomposition.

[0011] A published utility model, CN2685875Y, from China was filed on July 17, 2003. Utility model CN2685875Y was published on March 16, 2005. Document CN2685875Y relates to an integrated smoke analyzer based on zirconium dioxide. Document CN2685875Y discloses an analyzer with a measuring tip. At one end of the measuring tip are a zirconium dioxide-based sensor, a heating device, and a temperature sensor. At the other end of the measuring tip are two gas connections and a housing. An outlet protrudes from the housing. CN2685875Y discloses measures for protecting the leads to the zirconium dioxide-based sensor and the leads to the temperature sensor. These measures include a measuring tube attached to a flange and a rain guard.

[0012] An international patent application WO2022 / 064271A1 was filed on December 11, 2020, by ROSEMOUNT INC. The application was published on March 31, 2022. WO2022 / 064271A1 claims priority from September 24, 2020. Application WO2022 / 064271A1 relates to an in-situ averaging analyzer. WO2022 / 064271A1 discloses an analyzer with a measuring tip. The measuring tip has a first and a second end. Between the first and second ends of the measuring tip are several openings. Near the second end of the measuring tip are a sensor unit and a flange for mounting the analyzer. According to WO2022 / 064271A1, each sensor element requires leads and / or signal lines.

[0013] Patent application DE102012211039A1 was filed on June 27, 2012, by Robert Bosch GmbH, 70469 Stuttgart, Germany. The application was published on January 2, 2014. DE102012211039A1 relates to a gas sensor for soot. The sensor unit is arranged in a protective tube. Furthermore, a mounting fitting with a reduced diameter compared to the diameter of a housing is provided.

[0014] Patent US6015533A was granted on January 18, 2000, to Motorola Inc. (Schaumburg, IL). It describes a sensor housing for a calorimetric sensor. The filing date of US6015533A is November 14, 1997. US6015533A discloses a sensor connected via several electrical cables. A cable harness supports the electrical cables within a pipe. A wall defines the exhaust space. The cables and the cable harness are positioned outside the wall such that the cables, the cable harness, and its sheathing are not exposed to the exhaust flow.

[0015] Patent application US2010 / 050738A1 was filed on August 26, 2008. The application was published on March 4, 2010. US2010 / 050738A1 describes a sensor assembly with a thermally insulating housing. The assembly is divided into a first and a second cylindrical section. A flange is located between the first and second cylindrical sections. The first cylindrical section includes an inlet and an outlet. The second cylindrical section surrounds a plurality of cables. Similar to the cable harness described in US6015533A, the cables in US2010 / 050738A1 are guided by a cable gland. The cable gland includes openings for the individual cables.

[0016] A European patent application EP4236640A1 was filed on February 23, 2022, by Siemens AG. The application was published on August 30, 2023. EP4236640A1 relates to a holder for a printed circuit board. The holder in EP4236640A1 comprises at least one tubular fastening element. At least one electrical conductor is arranged inside the at least one tubular fastening element. The at least one tubular fastening element is guided through a first opening in the holder.

[0017] Patent application CN115791931A was filed on November 29, 2022. The application was published on March 14, 2023. CN115791931A discloses a packing structure for an oxygen sensor for the industrial automation of a combustion process. In particular, CN115791931A discloses a ceramic ring inside a tube. According to CN115791931A, a ceramic insulating piece has a plurality of feedthroughs. Platinum wires run through these feedthroughs.

[0018] The objective of this disclosure is to provide an arrangement with one or more supply lines that enables gas analysis at a combustion device. For this purpose, the arrangement must be designed to withstand the thermal, mechanical, and chemical stresses encountered during operation. Summary

[0019] An arrangement comprising one or more supply lines is provided. The one or more supply lines run through a rod-shaped insulating body. The one or more supply lines preferably run parallel to each other through the rod-shaped insulating body. The rod-shaped insulating body includes one or more openings for the one or more supply lines. The one or more supply lines are guided through the one or more openings in the rod-shaped insulating body. Furthermore, the one or more supply lines are fixed in place by means of the one or more openings in the rod-shaped insulating body.

[0020] The one or more supply lines can be guided through the rod-shaped insulating body in such a way that the passage is gas-tight. A gas-tight arrangement against combustion gases from a combustion device is particularly preferred. This means that the one or more passages enclose the one or more supply lines in such a way that the passage of gases, such as combustion gases, is prevented.

[0021] The one or more supply lines are / are electrically conductive. The one or more supply lines are / are made of a material with high temperature resistance. Therefore, the assembly with its supply line(s) is suitable for use in a combustion appliance.

[0022] The rod-shaped insulating body is made of an electrically insulating and temperature-resistant material. Preferably, the rod-shaped insulating body exhibits high resistance to chemical decomposition by combustion gases. For example, the rod-shaped insulating body can be made of a ceramic material.

[0023] A casing surrounds the rod-shaped insulating body and the one or more supply lines. The casing must also be temperature-resistant and resistant to chemical decomposition. For example, the casing can be made of corrosion-resistant steel. Furthermore, the compatibility of the casing material with the material of the outer wall of a combustion appliance must be ensured. This is important if the casing passes through the wall of a combustion appliance.

[0024] Between the sheathing and the rod-shaped insulating body is a gap of non-zero thickness. This gap can be filled with air and / or combustion gases, or generally with a gas. The gap improves the thermal insulation of the rod-shaped insulating body and the connecting pipes from the sheathing.

[0025] Spacers separate the rod-shaped insulating body from the casing. The spacers can include a retaining element, in particular a potting element. The retaining element, in particular the potting element, is arranged near one end of the casing and secures the rod-shaped insulating body. The retaining element, in particular the potting element, can also seal the assembly gas-tight towards that end.

[0026] The encasing body, in particular the potting body, has one or more passages for the one or more supply lines.

[0027] The spacers may also include one or more rings that separate the rod-shaped insulating body from the casing.

[0028] The arrangement is suitable for installation in a combustion appliance. The single or multiple supply lines are suitable for galvanic connection with a sensor unit inside the combustion appliance. For this purpose, the single or multiple supply lines are galvanically connected to a sensor unit at their end(s). A sensor unit inside the combustion appliance can thus be electrically contacted. Brief description of the drawings

[0029] Several features will become apparent to a person skilled in the art from the following detailed description of the disclosed non-restrictive embodiments. The drawings accompanying the detailed description can be briefly described as follows: FIG 1 schematically shows a supply line arrangement. FIG 2 The diagram schematically shows the supply line arrangement as a passage through a wall. Detailed description

[0030] In FIG 1 An arrangement with one or more supply lines 1a, 1b, 1c is illustrated according to the present disclosure. The arrangement includes a sheathing 2. The sheathing 2 can, for example, be a tubular sheathing. In particular, the sheathing 2 can be a tubular sheathing. In a special embodiment, the sheathing 2 is cylindrically symmetrical about an axis which runs parallel to the supply lines 1a, 1b, 1c.

[0031] The casing 2 is preferably made of steel. Particularly preferably, the casing 2 is made of corrosion-resistant steel. A casing 2 made of corrosion-resistant steel provides resistance to chemical degradation in an exhaust duct.

[0032] Furthermore, the casing 2 can be made of ferritic steel. Additionally, the casing 2 can be made of austenitic steel.

[0033] At least one of the supply lines 1a, 1b, 1c is preferably high-temperature resistant. It can thus withstand the temperatures in an exhaust gas duct of a combustion device such as a gas burner. In a high-temperature resistant embodiment, at least one of the supply lines 1a, 1b, 1c comprises nickel wire. In a particular embodiment, at least one of the supply lines 1a, 1b, 1c consists of nickel wire. For example, at least one of the supply lines 1a, 1b, 1c can consist of an alloy containing more than 70% or more than 75% nickel by mass.

[0034] Ideally, all supply lines 1a, 1b, 1c are high-temperature resistant. They can thus withstand the temperatures in an exhaust duct of a combustion device such as a gas burner. In a high-temperature resistant embodiment, all supply lines 1a, 1b, 1c comprise nickel wire. In a particular embodiment, all supply lines 1a, 1b, 1c consist of nickel wire. For example, all supply lines 1a, 1b, 1c can consist of an alloy containing more than 70% or more than 75% nickel by mass.

[0035] The supply lines 1a, 1b, and 1c each have a diameter smaller than the smallest inner diameter of the sheathing 2. For example, the supply lines can have diameters of 0.5 millimeters or one millimeter. Diameters larger than one millimeter are also possible.

[0036] In one embodiment, all supply lines 1a, 1b, 1c have the same diameter. Equal diameters reduce the number of possible arrangement variations. This, in turn, reduces the risk of one of the variations failing during operation.

[0037] Inside the sheathing 2, a rod-shaped insulating body 3 is arranged. The rod-shaped insulating body 3 is preferably a rod-shaped electrical insulating body and / or a rod-shaped electrical insulation. The rod-shaped insulating body 3 preferably has a specific electrical resistance ρ of at least one megaohm per centimeter at temperatures of 873 Kelvin. ρ > 1 M Ω ⋅ cm bei 873 Kelvin

[0038] The specific electrical resistance ρ is particularly preferred at temperatures of 873 Kelvin greater than five megaohms per centimeter: ρ > 5 M Ω ⋅ cm bei 873 Kelvin

[0039] Furthermore, a specific electrical resistance ρ greater than ten megaohms per centimeter is preferred at temperatures of 873 Kelvin: ρ > 10 M Ω ⋅ cm bei 873 Kelvin

[0040] High specific resistances enable sufficient electrical insulation between the supply lines 1a, 1b, 1c. Therefore, any signal obtained from a sensor element connected to the supply lines 1a, 1b, 1c is only minimally distorted.

[0041] In one embodiment, the rod-shaped insulating body 3 comprises ceramic, in particular aluminum oxide ceramic. The rod-shaped insulating body 3 consists of a special

[0042] A ceramic embodiment, in particular an aluminum oxide ceramic. Preferably, the aluminum oxide ceramic has a purity of more than 92 percent. Particularly preferably, the aluminum oxide ceramic has a purity of more than 96 percent. Ideally, the aluminum oxide ceramic has a purity of more than 99 percent. Improved ceramic purity leads to more predictable behavior with regard to electrical insulation and mechanical strength.

[0043] In another embodiment, the rod-shaped insulating body 3 comprises a ceramic material based on magnesium silicate. Furthermore, the rod-shaped insulating body 3 can consist of a ceramic material based on magnesium silicate. In a further embodiment, the rod-shaped insulating body 3 comprises porcelain. Furthermore, the rod-shaped insulating body 3 can consist of porcelain. In yet another embodiment, the rod-shaped insulating body 3 comprises porcelain. Furthermore, the rod-shaped insulating body 3 can consist of porcelain.

[0044] The rod-shaped insulating body 3 has at least one opening for one of the supply lines 1a, 1b, 1c. Preferably, the rod-shaped insulating body 3 has at least as many openings as the arrangement comprises supply lines 1a, 1b, 1c. Furthermore, the number of openings through the rod-shaped insulating body 3 can exceed the number of supply lines 1a, 1b, 1c. With a number of openings through the insulation 3 exceeding the number of supply lines 1a, 1b, 1c, additional supply lines can be added at a later time. It is also possible for the same rod-shaped insulating body 3 to be used for embodiments with different numbers of supply lines 1a, 1b, 1c. By using a rod-shaped insulating body 3 with a predetermined number of openings that covers all embodiments, the number of variants is limited. This reduces the probability that one of the variants will fail during operation.

[0045] The opening(s) through the rod-shaped insulating body 3 each have a diameter. For example, the opening(s) through the rod-shaped insulating body 3 can have diameters of at least 0.6 millimeters or at least 1.1 millimeters. One or more openings through the rod-shaped insulating body 3 with diameters greater than 1.5 millimeters are also possible.

[0046] In the case of multiple passages through the rod-shaped insulating body 3, preferably at least two passages through the rod-shaped insulating body 3 have the same diameter. Particularly preferably, all passages through the rod-shaped insulating body 3 have the same diameter. Equal diameters of the passages through the rod-shaped insulating body 3 result in a low number of variants. This reduces the probability that one of the variants will fail during operation. Furthermore, the manufacturing effort for the rod-shaped insulation 3 is reduced.

[0047] At least one passage through the rod-shaped insulating body 3 can comprise a bore, for example, a bore with a round cross-section. In particular, at least one passage through the rod-shaped insulating body 3 can be a bore, for example, a bore with a round cross-section. Furthermore, all passages through the rod-shaped insulating body 3 can each comprise a bore, for example, a bore with a round cross-section. The design of the passages through the rod-shaped insulating body 3 as bores enables the use of standard tools for manufacturing the insulating body 3.

[0048] The sheathing 2 has a first end 4a and a second end 4b. The first end 4a of the sheathing 2 is different from the second end 4b of the sheathing 2. The first end 4a of the sheathing 2 is opposite the second end 4b of the sheathing 2.

[0049] The sheathing 2 has a first opening at its first end 4a. The first opening preferably has a round cross-section. The sheathing 2 has a second opening at its second end 4b. The second opening preferably has a round cross-section. The first opening of the sheathing 2 is different from the second opening of the sheathing 2. In one embodiment, both the first opening of the sheathing 2 and the second opening of the sheathing 2 have a round cross-section.

[0050] The cross-sectional area of ​​the first opening of the casing 2 is usually different from the cross-sectional area of ​​the second opening of the casing 2. In particular, the smallest cross-sectional area of ​​the first opening of the casing 2 is usually different from the smallest cross-sectional area of ​​the second opening. However, it is possible to design the casing in which the cross-sectional areas of the first and second openings of the casing 2 are equal. In particular, the smallest cross-sectional areas of the first and second openings of the casing 2 can be equal.

[0051] A retaining body 5 is arranged towards the second end 4b of the casing 2. The retaining body 5 borders the rod-shaped insulating body 3 and the casing 2. The retaining body 5 has a first surface which borders a surface on the inside of the casing 2. The retaining body 5 has a second surface which borders a surface on the outside of the rod-shaped insulating body 3. Preferably, the first surface of the retaining body 5 is cylindrical. Preferably, the second surface of the retaining body 5 is cylindrical. In one embodiment, both the first and second surfaces of the retaining body 5 are cylindrical.

[0052] Even the smallest distance between the first and second surfaces of the enclosing body 5 affects the distance between the rod-shaped insulating body 3 and the sheathing 2. This distance can be, for example, less than ten millimeters or less than five millimeters. A distance between the rod-shaped insulating body 3 and the sheathing 2 facilitates the manufacture of the assembly. This distance also allows for (limited) thermal insulation of the insulating body 3 and the supply lines 1a, 1b, 1c from the sheathing 2. Such (limited) thermal insulation is advantageous with regard to the elevated temperatures in the exhaust duct of a combustion device.

[0053] In one embodiment, the edging body 5 is at least partially made of a potting compound. For example, the edging body 5 can be made entirely or partially of a heat-resistant epoxy resin. In another embodiment, the edging body 5 is made of polytetrafluoroethylene.

[0054] An enclosing body 5 as a potting element contributes to a gas-tight arrangement.

[0055] According to one aspect of the present disclosure, the edging body 5 or parts thereof are manufactured using an additive manufacturing process such as three-dimensional printing. In a particular embodiment, the edging body 5 or parts thereof can be manufactured by selective laser sintering.

[0056] The edging body 5 preferably has a specific electrical resistance ρ of at least one megaohm per centimeter at temperatures of 393 Kelvin: ρ > 1 M Ω ⋅ cm bei 393 Kelvin

[0057] The specific electrical resistance ρ is particularly preferred at temperatures of 393 Kelvin greater than five megaohms per centimeter: ρ > 5 M Ω ⋅ cm bei 393 Kelvin

[0058] Furthermore, a specific electrical resistance ρ greater than ten megaohms per centimeter is preferred at temperatures of 393 Kelvin: ρ > 10 M Ω ⋅ cm bei 393 Kelvin

[0059] High specific resistances enable sufficient electrical insulation between the supply lines 1a, 1b, 1c. Therefore, any signal obtained from a sensor element connected to the supply lines 1a, 1b, 1c is only minimally distorted.

[0060] The enclosing body 5 has at least one passage for one of the supply lines 1a, 1b, 1c. Preferably, the enclosing body 5 has at least as many passages as the arrangement comprises supply lines 1a, 1b, 1c. Furthermore, the number of passages through the enclosing body 5 can exceed the number of supply lines 1a, 1b, 1c. Additional supply lines can be added at a later time by having a number of passages through the insulation 3 that exceeds the number of supply lines 1a, 1b, 1c. It is also possible for the same enclosing body 5 to be used for embodiments with different numbers of supply lines 1a, 1b, 1c. By using an enclosing body 5 with a predetermined number of passages that covers all embodiments, the number of variants is limited. This reduces the probability that one of the variants will fail during operation.

[0061] The opening(s) through the edging body 5 each have a diameter. For example, the opening(s) through the edging body 5 can have diameters of at least 0.6 millimeters or at least 1.1 millimeters. One or more openings through the edging body 5 with diameters greater than 1.5 millimeters are also possible.

[0062] In the case of multiple passes through the edging body 5, preferably at least two passes through the edging body 5 have the same diameter. Particularly preferably, all passes through the edging body 5 have the same diameter. Equal diameters of the passes through the edging body 5 result in less variation. This reduces the probability of one of the variants failing during operation. Furthermore, the manufacturing effort for the edging body 5 is reduced.

[0063] Preferably, the rod-shaped insulating body 3 and the edging body 5 have the same number of passages. Ideally, the passages through the rod-shaped insulating body 3 and the edging body 5 also have the same or substantially the same diameters. "Substantially the same diameters" here means that the diameters are identical except for manufacturing tolerances. The passages through the rod-shaped insulating body 3 and the edging body 5 are arranged such that at least one supply line 1a runs directly through the arrangement. In one embodiment, the respective passages are arranged such that all supply lines 1a, 1b, 1c run directly through the arrangement. A direct path through the arrangement allows for a straight passage through the rod-shaped insulating body 3 and the edging body 5 without any kinks.

[0064] Furthermore, the passages through the rod-shaped insulating body 3 and the edging body 5 can also have similar diameters. For example, the passages through the edging body 5 can each be slightly wider than those through the rod-shaped insulating body 3 to facilitate easier assembly. The passages through the rod-shaped insulating body 3 and through the edging body 5 are arranged such that at least one supply line 1a runs directly through the arrangement. In one embodiment, the respective passages are arranged such that all supply lines 1a, 1b, 1c run directly through the arrangement. A direct path through the arrangement allows for a straight passage through the rod-shaped insulating body 3 and through the edging body 5 without any kinks.

[0065] At least one passage through the edging body 5 can comprise a bore, for example, a bore with a round cross-section. In particular, at least one passage through the edging body 5 can be a bore, for example, a bore with a round cross-section. Furthermore, all passages through the edging body 5 can each comprise a bore, for example, a bore with a round cross-section. The design of the passages through the edging body 5 as bores enables the use of standard tools for manufacturing the edging body 5.

[0066] The edging body 5 has a recess for a first ring 6a, 6b. The first ring 6a, 6b surrounds the rod-shaped insulating body 3. The first ring 6a, 6b rests against the rod-shaped insulating body 3. Furthermore, the first ring 6a, 6b rests against the sheathing 2. Thus, the first ring 6a, 6b rests against both the rod-shaped insulating body 3 and the sheathing 2. The first ring 6a, 6b is located between the rod-shaped insulating body 3 and the sheathing 2. For example, the first ring 6a, 6b can encompass a section. The section of the first ring 6a, 6b can run in a first groove or a first furrow formed by the edging body 5 and / or the sheathing 2.

[0067] In one embodiment, the first ring 6a, 6b is an O-ring, such as a temperature-resistant O-ring. In particular, the O-ring can be made of a silicone polymer. In another embodiment, the first ring 6a, 6b is a retaining ring, such as a temperature-resistant retaining ring. In particular, the retaining ring can be made of a silicone polymer. In yet another embodiment, the first ring 6a, 6b is an O-ring and a retaining ring, such as a temperature-resistant O-ring and a retaining ring. In particular, the O-ring and retaining ring can be made of a silicone polymer.

[0068] The first ring 6a, 6b can also be a sealing ring. This means that the first ring 6a, 6b helps to prevent gases from passing between the ends 4a, 4b. For example, the first ring 6a, 6b can help to prevent combustion gases from passing between the ends 4a, 4b of the assembly. In a particular embodiment, the first ring 6a, 6b is both an O-ring and a sealing ring. In another particular embodiment, the first ring 6a, 6b is both an O-ring and a retaining ring as well as a sealing ring.

[0069] The first ring 6a, 6b is located near the second end 4b of the arrangement. This means that the first ring 6a, 6b has a minimum distance from the first end 4a and a minimum distance from the second end 4b. The minimum distance of the first ring 6a, 6b from the first end 4a is greater than its minimum distance from the second end 4b.

[0070] Closer to the first end 4a, a second ring 7a, 7b is arranged. This means that the second ring 7a, 7b has a minimum distance from the first end 4a and a minimum distance from the second end 4b. The minimum distance of the second ring 7a, 7b from the first end 4a is less than its minimum distance from the second end 4b. The minimum distance of the second ring 7a, 7b from the first end 4a is less than the distance of the first ring 6a, 6b from the same end 4a. The minimum distance of the second ring 7a, 7b from the second end 4b is greater than the distance of the first ring 6a, 6b from the same end 4b.

[0071] The second ring 7a, 7b encircles the rod-shaped insulating body 3. The second ring 7a, 7b rests against the rod-shaped insulating body 3. Furthermore, the second ring 7a, 7b rests against the sheathing 2. Thus, the second ring 7a, 7b rests against both the rod-shaped insulating body 3 and the sheathing 2. For example, the second ring 7a, 7b can encompass a section. This section of the second ring 7a, 7b can run in a second groove or furrow formed by the sheathing 2. The second ring 7a, 7b is therefore located between the rod-shaped insulating body 3 and the sheathing 2.

[0072] In one embodiment, the second ring 7a, 7b is a snap ring, such as a temperature-resistant snap ring. In particular, the snap ring can be made of corrosion-resistant steel. In another embodiment, the second ring 7a, 7b is a retaining ring, such as a temperature-resistant retaining ring. In particular, the retaining ring can be made of corrosion-resistant steel. In yet another embodiment, the second ring 7a, 7b is both a snap ring and a retaining ring, such as a temperature-resistant snap ring and retaining ring. In particular, the snap ring and retaining ring can be made of corrosion-resistant steel.

[0073] The first ring 6a, 6b and the second ring 7a, 7b contribute to fixing the rod-shaped insulating body 3 relative to the sheathing 2. In particular, the first ring 6a, 6b and the second ring 7a, 7b enable the aforementioned minimum distance between the rod-shaped insulating body 3 and the sheathing 2. Furthermore, the first ring 6a, 6b and the second ring 7a, 7b prevent lateral movement of the rod-shaped insulating body 3 between the ends 4a, 4b.

[0074] The rod-shaped insulating body 3 and the sheathing 2 can have different coefficients of thermal expansion. For example, the rod-shaped insulating body 3 can have a coefficient of thermal expansion α between 2 × 10⁻⁶ λ / Kelvin and 10 × 10⁻⁶ λ / Kelvin in the range between 313 Kelvin and 673 Kelvin: 2 ⋅ 10 − 6 / Kelvin < α < 10 ⋅ 10 − 6 / Kelvin

[0075] In particular, the rod-shaped insulating body 3 can have a coefficient of thermal expansion α between 3·10 -6 / Kelvin and 9·10 -6 / Kelvin in the range between 313 Kelvin and 673 Kelvin: 3 ⋅ 10 − 6 / Kelvin < α < 9 ⋅ 10 − 6 / Kelvin

[0076] The rod-shaped insulating body 3 particularly preferably has a coefficient of thermal expansion α between 4·10 -6 / Kelvin and 8·10 -6 / Kelvin in the range between 313 Kelvin and 673 Kelvin: 4 ⋅ 10 − 6 / Kelvin < α < 8 ⋅ 10 − 6 / Kelvin

[0077] The aforementioned coefficients of thermal expansion α refer to an axis defined by at least one of the supply lines 1a, 1b, 1c. This means that these coefficients of thermal expansion α are axial coefficients along the aforementioned axis.

[0078] Furthermore, the casing 2 can have a coefficient of thermal expansion α between 10·10 -6< / Kelvin and 20·10 -6< / Kelvin at 293 Kelvin: 10 ⋅ 10 − 6 / Kelvin < α < 20 ⋅ 10 − 6 / Kelvin

[0079] In particular, the casing 2 can have a coefficient of thermal expansion α between 11·10 -62 / Kelvin and 19·10 -62 / Kelvin at 293 Kelvin: 11 ⋅ 10 − 6 / Kelvin < α < 19 ⋅ 10 − 6 / Kelvin

[0080] Particularly preferably, the casing 2 can have a coefficient of thermal expansion α between 11·10 -62 / Kelvin and 18·10 -62 / Kelvin at 293 Kelvin: 11 ⋅ 10 − 6 / Kelvin < α < 18 ⋅ 10 − 6 / Kelvin

[0081] The aforementioned coefficients of thermal expansion α refer to an axis defined by at least one of the supply lines 1a, 1b, 1c. This means that these coefficients of thermal expansion α are axial coefficients along the aforementioned axis.

[0082] Due to the different coefficients of thermal expansion of the sheathing 2 and the rod-shaped insulating body 3, mechanical stresses can occur in the arrangement. The problem of these mechanical stresses is exacerbated by the wide temperature range to which the arrangement is exposed during operation. The first ring 6a, 6b and the second ring 7a, 7b support the rod-shaped insulating body 3 relative to the sheathing 2 in such a way as to prevent cracks resulting from these mechanical stresses.

[0083] Optionally, a third ring 8a, 8b is arranged even closer to the first end 4a. This means that the third ring 8a, 8b has a minimum distance from the first end 4a and a minimum distance from the second end 4b. The minimum distance of the third ring 8a, 8b from the first end 4a is less than its minimum distance from the second end 4b. The minimum distance of the third ring 8a, 8b from the first end 4a is less than the distance of the first ring 6a, 6b from the same end 4a. The minimum distance of the third ring 8a, 8b from the second end 4b is greater than the distance of the first ring 6a, 6b from the same end 4b.

[0084] The smallest distance of the third ring 8a, 8b from the first end 4a is smaller than the distance of the second ring 7a, 7b from the same end 4a. The smallest distance of the third ring 8a, 8b from the second end 4b is larger than the distance of the second ring 7a, 7b from the same end 4b.

[0085] The optional third ring 8a, 8b surrounds the rod-shaped insulating body 3. The third ring 8a, 8b does not abut the rod-shaped insulating body 3. This means that the third ring 8a, 8b and the rod-shaped insulating body 3 do not touch each other. The third ring 8a, 8b and the rod-shaped insulating body 3 are spaced apart from each other. The third ring 8a, 8b abuts the casing 2. For example, the third ring 8a, 8b can encompass a section. The section of the third ring 8a, 8b can run in a third groove or furrow formed by the casing 2. The third ring 8a, 8b is therefore located between the rod-shaped insulating body 3 and the casing 2.

[0086] In one embodiment, the third ring 8a, 8b is a snap ring, such as a temperature-resistant snap ring. In particular, the snap ring can be made of corrosion-resistant steel. In another embodiment, the third ring 8a, 8b is a retaining ring, such as a temperature-resistant retaining ring. In particular, the retaining ring can be made of corrosion-resistant steel. In yet another embodiment, the third ring 8a, 8b is both a snap ring and a retaining ring, such as a temperature-resistant snap ring and a retaining ring. In particular, the snap ring and retaining ring can be made of corrosion-resistant steel.

[0087] FIG 2 shows the arrangement with the supply lines 1a, 1b, 1c from FIG 1The arrangement is installed in a wall 9. The arrangement with the supply lines 1a, 1b, 1c is divided into a first section 10a and a second section 10b. The arrangement thus forms a passage for the supply lines 1a, 1b, 1c through the wall 9.

[0088] The first section 10a is located outside an exhaust stack of a combustion appliance and outside a flue gas stack of the combustion appliance and / or outside a chimney of the combustion appliance. The first section 10a is also located outside a combustion chamber of the combustion appliance.

[0089] Preferably, the first section 10a is surrounded by ambient air with a temperature between 263 Kelvin and 318 Kelvin, particularly between 273 Kelvin and 308 Kelvin. Most preferably, the first section 10a is surrounded by ambient air with a temperature between 283 Kelvin and 298 Kelvin. This means that the first section 10a is surrounded by air with a temperature close to room temperature.

[0090] The first section 10a is furthermore surrounded by air at a pressure between 1100 hectopascals and 700 hectopascals, particularly between 1100 hectopascals and 800 hectopascals. Most preferably, the first section 10a is surrounded by ambient air at a pressure between 1050 hectopascals and 900 hectopascals. That is to say, the first section 10a is surrounded by air at a pressure close to standard atmospheric pressure.

[0091] The second section 10b is located within a structure selected from: an exhaust chimney of a combustion device, a flue gas chimney of the combustion device, a chimney of the combustion device. The second section 10b can also be selected from within two structures: a combustion appliance's exhaust stack, flue gas stack, or chimney. For example, one and the same structure can simultaneously serve as both a combustion appliance's exhaust stack and its flue gas stack. That is, the structure comprises both the exhaust stack and the flue gas stack of the combustion appliance. Furthermore, one and the same structure can simultaneously serve as the exhaust stack and the chimney of the combustion device. This means that the structure comprises both the exhaust stack and the chimney of the combustion device. Furthermore, one and the same structure can simultaneously serve as the flue gas stack and the chimney of the combustion device. That is to say, the structure encompasses both the flue gas stack and the chimney of the combustion device.

[0092] The second section 10b can furthermore be located within three structures: within an exhaust stack of a combustion appliance, within a flue gas stack of the combustion appliance, and within a chimney of the combustion appliance. For example, one and the same structure can simultaneously serve as an exhaust stack of a combustion appliance, as a flue gas stack of the combustion appliance, and as a chimney of the combustion appliance. That is to say, the structure comprises the exhaust stack, the flue gas stack, and the chimney of the combustion appliance.

[0093] The second section 10b may still be located within a combustion chamber of a combustion device.

[0094] Preferably, the second section 10b is surrounded by exhaust gases and / or flue gases with a temperature of up to 873 Kelvin, particularly up to 673 Kelvin. It is especially preferred that the second section 10b of the arrangement be surrounded by exhaust gases and / or flue gases with a temperature of up to 500 Kelvin. This means that the second section 10b is surrounded by exhaust gases and / or flue gases originating from a combustion chamber of a combustion device.

[0095] In general, a first temperature gradient exists within the second section 10b. This means that the temperatures of the exhaust gases and / or flue gases decrease with increasing distance from the combustion chamber of the combustion device. A second temperature gradient also generally exists within the second section 10b. This means that the temperatures of the exhaust gases and / or flue gases decrease towards the wall.

[0096] The exhaust gases and / or flue gases exhibit pressures in the second section 10b that are equal to or similar to the pressures in the first section 10a. Similar pressures mean that the pressures differ by less than 100 hectopascals, preferably by less than 50 hectopascals, and most preferably by less than 20 hectopascals. Small pressure differences reduce the mechanical stress on the wall 9 and the arrangement comprising the first section 10a and the second section 10b.

[0097] The wall 9 and the casing 2 are, for example, made of metal, preferably steel, in particular corrosion-resistant steel. During operation, the wall 9 and the casing 2 are exposed to a wide range of temperatures. Due to differing coefficients of thermal expansion α between the wall 9 and the casing 2, cracks can occur.

[0098] A marking may be provided on the outside of the casing 2, indicating to an installer the installation depth into the wall 9 of a combustion appliance. In particular, a marking may be provided on the outside of the casing 2, indicating to an installer the installation depth into an outer wall 9 of a combustion appliance. Furthermore, a scale may be provided on the outside of the casing 2, indicating to an installer the installation depth into an outer wall 9 of a combustion appliance. The scale includes several values, allowing the installer to select a suitable installation depth.

[0099] To avoid mechanical stresses, the wall 9 and the casing 2 are preferably made of materials with similar coefficients of thermal expansion α. ​​For example, the wall 9 and the casing 2 can have a coefficient of thermal expansion α between 10 × 10⁻⁶ λ / Kelvin and 20 × 10⁻⁶ λ / Kelvin at 293 Kelvin. 10 ⋅ 10 − 6 / Kelvin < α < 20 ⋅ 10 − 6 / Kelvin

[0100] In particular, the wall 9 and the casing 2 can have a coefficient of thermal expansion α between 11·10 -62 / Kelvin and 19·10 -62 / Kelvin at 293 Kelvin: 11 ⋅ 10 − 6 / Kelvin < α < 19 ⋅ 10 − 6 / Kelvin

[0101] Particularly preferably, the wall 9 and the casing 2 can have a coefficient of thermal expansion α between 11·10 -6< / Kelvin and 18·10 -6< / Kelvin at 293 Kelvin: 11 ⋅ 10 − 6 / Kelvin < α < 18 ⋅ 10 − 6 / Kelvin

[0102] The aforementioned coefficients of thermal expansion α refer to an axis defined by at least one of the supply lines 1a, 1b, 1c. This means that these coefficients of thermal expansion α are axial coefficients along the aforementioned axis.

[0103] According to one aspect of the present revelation, the casing 2 is screwed into the wall 9. According to a specific aspect of the present revelation, the casing 2 is screwed into the outer wall 9.

[0104] In a further embodiment, a layer for thermal decoupling is provided between the casing 2 and the wall 9. For example, a layer for thermal decoupling is provided between the casing 2 and an outer wall 9 of the combustion device. The layer for thermal decoupling can, in particular, comprise a glass fiber reinforced plastic and / or a ceramic material. In one embodiment, the layer for thermal decoupling consists of a glass fiber reinforced plastic and / or a ceramic material.

[0105] In other words, the present disclosure teaches an arrangement comprising at least a first electrically conductive lead (1a, 1b, 1c), a sheath (2) and a rod-shaped insulating body (3); wherein the sheathing (2) has a first end (4a) and a second end (4b), the first end (4a) being different from the second end (4b), the first end (4a) being opposite the second end (4b), and the sheathing (2) having a first opening at the first end (4a) and a second opening at the second end (4b); wherein the at least one first supply line (1a, 1b, 1c) extends from the first end (4a) to the second end (4b) through the arrangement and defines an axis; wherein the rod-shaped insulating body (3) comprises at least one passage through the rod-shaped insulating body (3), and a first section of the at least one supply line (1a, 1b, 1c) extends through the at least one passage through the rod-shaped insulating body (3); wherein the at least one first supply line (1a, 1b, 1c) has a first length between the first opening and the second opening;wherein the first section of the at least one supply line (1a, 1b, 1c) has a second length in the at least one passage through the rod-shaped insulating body (3) and the second length is shorter than the first length; wherein the rod-shaped insulating body (3) comprises an outer surface radially outward from the axis and the sheathing (2) comprises an inner surface radially outward from the axis, wherein the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) each run parallel to the axis, such that the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) are opposite each other;and wherein the arrangement comprises a gap of a thickness arranged between the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2), and spacers (5, 6a, 6b, 7a, 7b) for spacing the rod-shaped insulating body (3) from the sheathing (2), the spacers (5, 6a, 6b, 7a, 7b) defining the thickness of the gap.

[0106] The present disclosure also includes one of the aforementioned arrangements, wherein the arrangement comprises at least one second electrically conductive supply line (1a, 1b, 1c) and the at least one second electrically conductive supply line (1a, 1b, 1c) is different from the at least one first electrically conductive supply line (1a, 1b, 1c). The rod-shaped insulating body (3) comprises at least one further passage and the at least one second electrically conductive supply line (1a, 1b, 1c) runs through the at least one further passage.

[0107] The at least one first electrically conductive supply line (1a, 1b, 1c) is preferably at least one first electrically conductive supply line to a sensor unit, in particular to a sensor unit within a combustion device. The at least one second electrically conductive supply line (1a, 1b, 1c) is preferably at least one second electrically conductive supply line to the sensor unit, in particular to the sensor unit within the combustion device. The sensor unit can, for example, be located within a structure of the combustion device, the structure being selected from: an exhaust chimney, a flue gas chimney, a chimney be arranged.

[0108] In one embodiment, the at least one first electrically conductive supply line (1a, 1b, 1c) is galvanically connected to the sensor unit. In one embodiment, the at least one first electrically conductive supply line (1a, 1b, 1c) and the at least one second electrically conductive supply line (1a, 1b, 1c) are galvanically connected to the sensor unit.

[0109] In one embodiment, the first length is defined as the distance between the first (4a) and the second end (4b).

[0110] The present disclosure also includes one of the aforementioned arrangements, wherein the first section of the at least one supply line (1a, 1b, 1c) has a second length in the at least one passage through the rod-shaped insulating body (3) and the second length is shorter than the first length.

[0111] The present disclosure further includes one of the aforementioned arrangements, wherein the first section of the at least one supply line (1a, 1b, 1c) has a second length in the at least one passage through the rod-shaped insulating body (3) and the second length is shorter than the first length.

[0112] The present disclosure further includes one of the aforementioned arrangements, wherein the axis is an axis of symmetry. The present disclosure further includes one of the aforementioned arrangements, wherein the axis runs centrally through the arrangement. In one embodiment, the axis extends from the first end (4a) of the arrangement to the second end (4b) of the arrangement.

[0113] The present disclosure also includes one of the aforementioned arrangements, wherein the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) each run along the axis.

[0114] The present disclosure further includes one of the aforementioned arrangements, wherein the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) are spaced apart radially from the axis. Preferably, this defines and / or determines the thickness of the gap.

[0115] The present disclosure further includes one of the aforementioned arrangements, wherein the arrangement comprises the gap of a thickness which is arranged between the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2), and includes spacers (5, 6a, 6b, 7a, 7b) for spacing the rod-shaped insulating body (3) from the sheathing (2), wherein the spacers (5, 6a, 6b, 7a, 7b) determine the thickness of the gap.

[0116] The aforementioned gap is preferably a radial gap. In one embodiment, the gap runs along a closed line (outside) around the rod-shaped insulating body (3). In a particular embodiment, the gap runs along a circle or an ellipse (outside) around the rod-shaped insulating body (3).

[0117] The present disclosure also teaches one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) are designed to space the outer surface of the rod-shaped insulating body (3) away from the inner surface of the sheathing (2) and define the thickness of the gap.

[0118] The present revelation further teaches one of the aforementioned arrangements, wherein the at least one first conduit (1a, 1b, 1c) from the first end (4a) to the second end (4b) runs straight through the arrangement and defines the axis.

[0119] The present revelation also teaches one of the aforementioned instructions, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise an edging body (5); and wherein the edging body (5) comprises at least a first section perpendicular to the axis and adjacent to the rod-shaped insulating body (3) and at least a second section parallel to the axis and adjacent to the sheathing (2).

[0120] The present disclosure further includes one of the aforementioned arrangements with enclosing body (5), wherein the second section of the enclosing body (5) is different from the first section of the enclosing body (5).

[0121] The enclosing body (5) is distinct from the rod-shaped insulating body (3). In one embodiment, the enclosing body (5) can be mechanically separated from the rod-shaped insulating body (3) without machining. In another embodiment, the enclosing body (5) can be mechanically separated from the rod-shaped insulating body (3) without machining. In another, gas-tight embodiment, the enclosing body (5) is mechanically connected and / or encapsulated with the casing (2) and the rod-shaped insulating body (3) in such a way that separating the enclosing body (5) from the casing (2) and separating the enclosing body (5) from the rod-shaped insulating body (3) requires machining.

[0122] The present disclosure further includes one of the aforementioned arrangements with enclosing body (5), wherein the enclosing body (5) comprises at least a third section which runs parallel to the axis and borders the outer surface of the rod-shaped insulating body (3).

[0123] The present disclosure also includes one of the aforementioned arrangements with a rim body (5) and a third section, wherein the third section of the rim body (5) is different from the second section of the rim body (5). The present disclosure further includes one of the aforementioned arrangements with a rim body (5) and a third section, wherein the third section of the rim body (5) is different from the first section of the rim body (5).

[0124] The present revelation also teaches one of the aforementioned arrangements with enclosing body (5),

[0125] wherein the edging body (5) has at least one passage and a second section of the at least one supply line (1a, 1b, 1c) in which at least one passage passes through the edging body (5).

[0126] The present disclosure further teaches one of the aforementioned arrangements with a rim body (5), wherein the rim body (5) can be attached to the rod-shaped insulating body (3) from the axis in an axial direction.

[0127] The present disclosure also includes one of the aforementioned arrangements with a frame body (5), wherein the frame body (5) can be attached or fastened to the rod-shaped insulating body (3) by pushing it on in an axial direction from the axis.

[0128] The present disclosure further teaches one of the aforementioned arrangements with a rim body (5), wherein the rim body (5) can be inserted into the casing (2) from the axis in an axial direction.

[0129] The present disclosure also includes one of the aforementioned arrangements with a frame body (5), wherein the frame body (5) can be attached to the casing (2) by insertion in an axial direction from the axis. The casing (2) can for this purpose comprise a fastening means which includes a fastening surface that extends perpendicular to the axis.

[0130] The present disclosure also teaches one of the aforementioned arrangements with enclosing body (5), wherein the enclosing body (5) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the enclosing body (5) from the first end (4a) is greater than the second distance of the enclosing body (5) from the second end (4b).

[0131] The present disclosure further includes one of the aforementioned arrangements with a rim body (5), wherein the rim body (5) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the rim body (5) from the first end (4a) is longer than the second distance of the rim body (5) from the second end (4b).

[0132] The present disclosure further includes one of the aforementioned arrangements with a enclosing body (5), wherein the enclosing body (5) has a first distance to the first opening of the casing (2) and a second distance to the second opening of the casing (2), wherein the first distance of the enclosing body (5) from the first opening of the casing (2) is greater than the second distance of the enclosing body (5) from the second opening of the casing (2).

[0133] The present disclosure further includes one of the aforementioned arrangements with a enclosing body (5), wherein the enclosing body (5) has a first distance to the first opening of the casing (2) and a second distance to the second opening of the casing (2), wherein the first distance of the enclosing body (5) from the first opening of the casing (2) is longer than the second distance of the enclosing body (5) from the second opening of the casing (2).

[0134] The present disclosure further teaches one of the aforementioned arrangements with a rim body (5), wherein the rod-shaped insulating body (3) and the rim body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 393 Kelvin. r exhibit a value of at least one megaohm·centimeter.

[0135] The present disclosure also includes one of the aforementioned arrangements with enclosing body (5), wherein the rod-shaped insulating body (3) and the enclosing body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 393 Kelvin. r exhibit at least ten megaohms per centimeter.

[0136] The present disclosure further includes one of the aforementioned arrangements with enclosing body (5), wherein the rod-shaped insulating body (3) and the enclosing body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 473 Kelvin. r exhibit a value of at least one megaohm·centimeter.

[0137] The present disclosure also includes one of the aforementioned arrangements with enclosing body (5), wherein the rod-shaped insulating body (3) and the enclosing body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 473 Kelvin. r exhibit at least ten megaohms per centimeter.

[0138] The present disclosure further includes one of the aforementioned arrangements with enclosing body (5), wherein the rod-shaped insulating body (3) and the enclosing body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 673 Kelvin. r exhibit a value of at least one megaohm·centimeter.

[0139] The present disclosure further includes one of the aforementioned arrangements with enclosing body (5), wherein the rod-shaped insulating body (3) and the enclosing body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 673 Kelvin. r exhibit at least ten megaohms per centimeter.

[0140] The present disclosure also includes one of the aforementioned arrangements with enclosing body (5), wherein the rod-shaped insulating body (3) and the enclosing body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 873 Kelvin. r exhibit a value of at least one megaohm·centimeter.

[0141] The present disclosure further includes one of the aforementioned arrangements with enclosing body (5), wherein the rod-shaped insulating body (3) and the enclosing body (5) are each electrical insulators and each have a specific electrical resistance at temperatures of 873 Kelvin. r exhibit at least ten megaohms per centimeter.

[0142] The present disclosure further teaches one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a first ring (6a, 6b) which extends along a first closed curve around the rod-shaped insulating body (3) and borders the rod-shaped insulating body (3) and the sheathing (2).

[0143] The present disclosure also includes one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a first ring (6a, 6b) which extends along a first closed curve (outside) around the rod-shaped insulating body (3) and touches the rod-shaped insulating body (3) and the sheathing (2).

[0144] The present disclosure further includes one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a first ring (6a, 6b) which extends along a first closed curve (outside) around the rod-shaped insulating body (3) and borders the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2).

[0145] The present disclosure further includes one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a first ring (6a, 6b) which extends along a first closed curve (outside) around the rod-shaped insulating body (3) and touches the outer surface of the rod-shaped insulating body (3) and touches the inner surface of the sheathing (2).

[0146] The first closed curve can be a first closed line. The first closed curve can be a first circle and / or a first ellipse.

[0147] The present revelation further teaches one of the aforementioned arrangements with a first ring (6a, 6b), wherein the first ring (6a, 6b) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the first ring (6a, 6b) from the first end (4a) is greater than the second distance of the first ring (6a, 6b) from the second end (4b).

[0148] The present disclosure further includes one of the aforementioned arrangements with a first ring (6a, 6b), wherein the first ring (6a, 6b) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the first ring (6a, 6b) from the first end (4a) is longer than the second distance of the first ring (6a, 6b) from the second end (4b).

[0149] The present disclosure further includes one of the aforementioned arrangements with a first ring (6a, 6b), wherein the first ring (6a, 6b) has a first distance to the first opening of the casing (2) and a second distance to the second opening of the casing (2), wherein the first distance of the first ring (6a, 6b) from the first opening of the casing (2) is greater than the second distance of the first ring (6a, 6b) from the second opening of the casing (2).

[0150] The present disclosure further includes one of the aforementioned arrangements with a first ring (6a, 6b), wherein the first ring (6a, 6b) has a first distance to the first opening of the casing (2) and a second distance to the second opening of the casing (2), wherein the first distance of the first ring (6a, 6b) from the first opening of the casing (2) is longer than the second distance of the first ring (6a, 6b) from the second opening of the casing (2).

[0151] The present disclosure further teaches one of the aforementioned arrangements with enclosing body (5) and with first ring (6a, 6b), wherein the enclosing body (5) comprises a recess and the first ring (6a, 6b) comprises a section which is arranged in and / or extends within the recess of the enclosing body (5).

[0152] The present disclosure further includes one of the aforementioned arrangements with edging body (5) and with first ring (6a, 6b), wherein the edging body (5) comprises a groove and the first ring (6a, 6b) comprises a (cylindrically symmetrical) section which is arranged and / or extends in the groove of the edging body (5).

[0153] The present disclosure also includes one of the aforementioned arrangements with enclosing body (5) and with first ring (6a, 6b), wherein the enclosing body (5) comprises a groove and the first ring (6a, 6b) comprises a (cylindrically symmetrical) section which is arranged and / or extends in the groove of the enclosing body (5).

[0154] The present disclosure further teaches one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a second ring (7a, 7b) which extends along a second closed curve around the rod-shaped insulating body (3) and is adjacent to the rod-shaped insulating body (3) and to the sheathing (2) and is distinct from either the first ring (6a, 6b); and wherein the second ring (7a, 7b) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the second ring (7a, 7b) from the first end (4a) is less than the second distance of the second ring (7a, 7b) from the second end (4b).

[0155] The present disclosure also includes one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a second ring (7a, 7b) which extends along a second closed curve around the rod-shaped insulating body (3) and is adjacent to the rod-shaped insulating body (3) and to the sheathing (2) and is distinct from either or the first ring (6a, 6b); and wherein the second ring (7a, 7b) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the second ring (7a, 7b) from the first end (4a) is less and / or shorter than the second distance of the second ring (7a, 7b) from the second end (4b).

[0156] The present disclosure also includes one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a second ring (7a, 7b) which extends along a second closed curve around the rod-shaped insulating body (3) and contacts the rod-shaped insulating body (3) and contacts the sheathing (2) and is different from one or the first ring (6a, 6b); and wherein the second ring (7a, 7b) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the second ring (7a, 7b) from the first end (4a) is smaller and / or less and / or shorter than the second distance of the second ring (7a, 7b) from the second end (4b).

[0157] The present disclosure further includes one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a second ring (7a, 7b) which extends along a second closed curve around the rod-shaped insulating body (3) and borders the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) and is distinct from either the first ring (6a, 6b); and wherein the second ring (7a, 7b) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the second ring (7a, 7b) from the first end (4a) is smaller and / or less and / or shorter than the second distance of the second ring (7a, 7b) from the second end (4b).

[0158] The present disclosure further includes one of the aforementioned arrangements, wherein the spacers (5, 6a, 6b, 7a, 7b) comprise a second ring (7a, 7b) which extends along a second closed curve around the rod-shaped insulating body (3) and contacts the outer surface of the rod-shaped insulating body (3) and contacts the inner surface of the sheathing (2) and is different from either or the first ring (6a, 6b); and wherein the second ring (7a, 7b) has a first distance to the first end (4a) and a second distance to the second end (4b), wherein the first distance of the second ring (7a, 7b) from the first end (4a) is smaller and / or less and / or shorter than the second distance of the second ring (7a, 7b) from the second end (4b).

[0159] The second closed curve is different from the first closed curve. The second closed curve can be a second closed line. The second closed curve can be a second circle and / or a second ellipse.

[0160] The present disclosure further teaches a combustion device comprising a combustion chamber and a structure selected from an exhaust chimney, a flue gas chimney, a chimney; wherein the structure is in fluid communication with the combustion chamber; wherein the combustion device comprises one of the aforementioned arrangements; and wherein at least one section (10b) of the arrangement is arranged within the structure.

[0161] The present disclosure further teaches one of the aforementioned combustion devices, wherein the structure comprises an outer wall (9) and the casing (2) of the arrangement is guided through the outer wall (9) such that the at least one section (10b) of the arrangement projects into the structure.

[0162] The present disclosure further includes one of the aforementioned combustion devices with an outer wall (9), wherein the arrangement forms and / or is a passage through the outer wall (9).

[0163] The present disclosure further includes one of the aforementioned combustion devices with outer wall (9), wherein the outer wall (9) and the casing (2) of the arrangement each have a coefficient of thermal expansion α between 10·10 -6< / Kelvin and 20·10 -6< / Kelvin at 293 Kelvin.

[0164] The present disclosure also includes one of the aforementioned combustion devices with outer wall (9), wherein the outer wall (9) and the casing (2) of the arrangement each have a coefficient of thermal expansion α between 10·10 -6< / Kelvin and 20·10 -6< / Kelvin in a range between 273 Kelvin and 873 Kelvin, in particular in a range between 273 Kelvin and 673 Kelvin, and most preferably in a temperature range between 273 Kelvin and 473 Kelvin.

[0165] The above refers to individual embodiments of the disclosure. Various modifications to the embodiments can be made without deviating from the underlying idea and without leaving the scope of this disclosure. The subject matter of the present disclosure is defined by its claims. A wide variety of modifications can be made without leaving the scope of protection of the following claims. Reference sign

[0166] 1a, 1b, 1c: Supply lines 2: Sheathing 3: Rod-shaped insulating body 4a, 4b: Ends 5: Edge body 6a, 6b: Ring 7a, 7b: Ring 8a, 8b: Ring 9: Wall 10a, 10b: Sections

Claims

1. Arrangement comprising at least one first electrically conductive supply line (1a, 1b, 1c), a sheathing (2) and a rod-shaped insulating body (3) which is made of an electrically insulating and temperature-resistant material; wherein the sheathing (2) has a first end (4a) and a second end (4b) and the first end (4a) is different from the second end (4b) and the first end (4a) is opposite the second end (4b) and the sheathing (2) has a first opening at the first end (4a) and a second opening at the second end (4b); wherein the at least one first supply line (1a, 1b, 1c) runs from the first end (4a) to the second end (4b) through the arrangement and defines an axis; wherein the rod-shaped insulating body (3) comprises at least one passage through the rod-shaped insulating body (3) and a first section of the at least one supply line (1a, 1b, 1c) runs in the at least one passage through the rod-shaped insulating body (3); wherein the at least one first supply line (1a, 1b, 1c) has a first length between the first opening and the second opening; wherein the first section of the at least one supply line (1, 1b, 1c) has a second length in the at least one passage through the rod-shaped insulating body (3) and the second length is smaller than the first length; wherein the rod-shaped insulating body (3) comprises an outer surface radially outwards from the axis and the sheathing (2) comprises an inner surface outwards from the axis, wherein the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) each run parallel to the axis, so that the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) face each other; wherein the arrangement comprises a gap which has a size and is arranged between the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) and comprises spacers (5, 6a, 6b, 7a, 7b) so as to provide a spacing between the rod-shaped insulating body (3) and the sheathing (2), wherein the spacers (5, 6a, 6b, 7a, 7b) define the size of the gap; wherein the spacers (5, 6a, 6b, 7a,7b) comprise a surround body (5); and wherein the surround body (5) comprises at least one first section, which runs perpendicular to the axis and adjoins the rod-shaped insulating body (3), and at least one second section, which runs parallel to the axis and adjoins the sheathing (2).

2. The arrangement according to claim 1, wherein the spacers (5, 6a, 6b, 7a, 7b) are designed so as to provide a spacing between the outer surface of the rod-shaped insulating body (3) and the inner surface of the sheathing (2) and define the size of the gap.

3. The arrangement according to one of claims 1 to 2, wherein the at least one first supply line (1a, 1b, 1c) runs from the first end (4a) to the second end (4b) in a straight line through the arrangement and defines the axis.

4. The arrangement according to claim 1, wherein the surround body (5) comprises at least one passage and a second section of the at least one supply line (1a, 1b, 1c) in the at least one passage runs through the surround body (5).

5. The arrangement according to one of claims 1 or 4, wherein the surround body (5) can be plugged onto the rod-shaped insulating body (3) in the axial direction outwards from the axis.

6. The arrangement according to one of claims 1 or 4 to 5, wherein the surround body (5) can be plugged into the sheathing (2) in the axial direction outwards from the axis.

7. The arrangement according to one of claims 1 or 4 to 6, wherein the surround body (5) has a first spacing to the first end (4a) and a second spacing to the second end (4b), wherein the first spacing of the surround body (5) from the first end (4a) is greater than the second spacing of the surround body (5) from the second end (4b).

8. The arrangement according to one of claims 1 or 4 to 7, wherein the rod-shaped insulating body (3) and the surround body (5) are each electrical insulators and at temperatures of 393 Kelvin each have a specific electrical resistance ρ of at least one megaohm·centimetre.

9. The arrangement according to one of claims 1 to 8, wherein the spacers (5, 6a, 6b, 7a, 7b) have a first ring (6a, 6b), which runs along a first closed curve around the rod-shaped insulating body (3) and adjoins the rod-shaped insulating body (3) and adjoins the sheathing (2).

10. The arrangement according to claim 9, wherein the first ring (6a, 6b) has a first spacing to the first end (4a) and a second spacing to the second end (4b), wherein the first spacing of the first ring (6a, 6b) from the first end (4a) is greater than the second spacing of the first ring (6a, 6b) from the second end (4b).

11. The arrangement according to claim 10, wherein the surround body (5) comprises a recess and the first ring (6a, 6b) comprises a section which is arranged and / or runs in the recess of the surround body (5).

12. The arrangement according to one of claims 1 to 11, wherein the spacers (5, 6a, 6b, 7a,7b) comprise a second ring (7a, 7b), which runs along a second closed curve around the rod-shaped insulating body (3) and adjoins the rod-shaped insulating body (3) and adjoins the sheathing (2) and is different from a or from the first ring (6a, 6b), and wherein the second ring (7a, 7b) has a first spacing to the first end (4a) and a second spacing to the second end (4b), wherein the first spacing of the second ring (7a, 7b) from the first end (4a) is smaller than the second spacing of the second ring (7a, 7b) from the second end (4b).

13. Combustion apparatus comprising a combustion chamber and a structure selected from - an exhaust gas stack, - a flue gas stack, - a chimney; wherein the structure is connected to the combustion chamber in terms of fluid technology; wherein the combustion apparatus comprises an arrangement according to one of claims 1 to 12; and wherein at least one section (10b) of the arrangement is arranged within the structure.

14. The combustion apparatus according to claim 13, wherein the structure comprises an outer wall (9) and the sheathing (2) of the arrangement is guided through the outer wall (9) in such a manner that the at least one section (10b) of the arrangement protrudes into the structure.