Gas heat tracing sampling pipe

Abstract

The utility model relates to the technical field of sampling tubes, and provides a gas heat tracing sampling tube which comprises an inner tube, the inner tube is provided with a collecting cavity, a protective tube is arranged on the outer side of the inner tube, the protective tube and the inner tube form a heating cavity, a connector is arranged at one end of the inner tube, the protective tube and the collecting head form a through hole, and the through hole is used for communicating the heating cavity with the external environment. By means of the technical scheme, the problems that in the prior art, a heat tracing sampling pipe affects the gas detection precision and occupies a large space are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling tubes, and in particular to a gas heating sampling tube. Background Art

[0002] In the field of gas sampling, accurately obtaining representative gas samples is crucial. However, practical sampling processes present numerous challenges. Traditional gas sampling tubes often present the following issues: First, the inner tube material may not simultaneously meet the requirements for corrosion resistance, high temperature resistance, and sealing. This makes the gas susceptible to external factors under different sampling environments, affecting the accuracy and reliability of sampling. Second, improperly designed protective tubes may affect the heating of the entire inner tube due to the openings, resulting in heat loss and reduced heating efficiency and effectiveness. This can easily lead to condensation, freezing, or other changes in the sampled gas during transmission. Furthermore, the connector design is not optimized. Directly opening a through hole in the connector can affect the connection strength and sealing with the device being sampled, leading to loosening or leakage during sampling, affecting the stability and continuity of sampling. Furthermore, temperature fluctuations at the connector are prone to affecting gas detection accuracy. These temperature fluctuations can also cause thermal stress on the equipment, shortening its service life and increasing maintenance costs and frequency. Therefore, to address these issues, the present invention proposes a new gas heated sampling tube designed to improve sampling accuracy, reliability, and stability while reducing maintenance costs. Utility Model Content

[0003] The utility model provides a gas heating sampling tube, which solves the problems in the related art that the heating sampling tube affects the gas detection accuracy and occupies a large space.

[0004] The technical solution of the utility model is as follows:

[0005] A gas heating sampling tube, comprising

[0006] an inner tube having a collecting chamber,

[0007] A protective tube is provided outside the inner tube, and the protective tube and the inner tube form a heating chamber.

[0008] A connector is provided at one end of the inner tube, and a through hole is formed between the protective tube and the connector, and the through hole is used to connect the heating chamber with the external environment.

[0009] As a further technical solution, it also includes

[0010] A collecting head is provided at the other end of the inner tube.

[0011] A heating tape is arranged in the heating chamber, wound around the inner tube, and extends from the through hole to the external environment.

[0012] As a further technical solution, the end of the collecting head has a conical collecting hole, and the conical collecting hole is connected to the collecting cavity.

[0013] As a further technical solution, it also includes

[0014] A cover body is provided on the collecting head and is located above the conical collecting hole, and is used to block the conical collecting hole. The cover body has a collecting hole, and the conical collecting hole leads to the collecting hole, and the collecting hole leads to the detection device.

[0015] A sealing member is provided between the cover body and the collecting head and is used for sealing connection between the cover body and the collecting head.

[0016] As a further technical solution, the inner tube includes

[0017] a first end tube, the first end tube having a connecting end, the connecting end being used to connect to the connector,

[0018] A second end tube, the second end tube having a collecting end, the collecting end being used to connect with the collecting head,

[0019] The connecting tubes are several and connected in sequence, the first end tube and the second end tube are arranged at the ends of the two outermost connecting tubes, the connecting tubes, the first end tube and the second end tube all have inner cavities, and the inner cavities are interconnected to form the collecting chamber.

[0020] As a further technical solution, the connecting pipe has an external threaded portion at one end and a boss at the other end, and the boss has an internal threaded portion. The external threaded portion is engaged with the internal threaded portion of another adjacent connecting pipe. After the external threaded portion is engaged with the internal threaded portion, the inner wall of the collection chamber is a smooth cylindrical surface.

[0021] As a further technical solution, the boss has a through-hole, and the through-hole is used for the heating tape to pass through.

[0022] As a further technical solution, the protective tube is a telescopic tube.

[0023] As a further technical solution, the side wall of the protection tube has a first connection hole, the side wall of the collecting head has a second connection hole, and further includes

[0024] A locking bolt passes through the first connecting hole and the second connecting hole and is used to fix the protective tube to the collecting head.

[0025] The working principle and beneficial effects of the utility model are as follows:

[0026] In the present invention, the inner tube has a collection chamber. This collection chamber is used to hold the sampled gas, ensuring that the gas can be effectively collected and transmitted during the sampling process. The material of the inner tube has certain corrosion resistance, high temperature resistance, and sealing properties to adapt to different sampling environments and gas characteristics. A protective tube is arranged on the outside of the inner tube and forms a heating chamber with the inner tube. The main function of the protective tube is to protect the inner tube from external physical damage, chemical corrosion, or other adverse factors. The heating chamber between the protective tube and the inner tube provides installation space for a heating element, allowing the sampling tube to heat the sampled gas when necessary to prevent condensation or other changes in the gas during transmission. A connector is arranged at one end of the inner tube for connecting to the sampling equipment or other piping system. The design of the connector must ensure the sealing and reliability of the connection to prevent gas leakage. The protective tube and the connector form a through hole that connects the heating chamber to the external environment, allowing the heating element to be connected to an external power supply or control system to achieve heating control of the heating chamber. The protective tube provides physical protection for the inner tube, protecting the inner tube from external impact, wear, or corrosion. At the same time, the heating element in the heating chamber can heat the sampled gas to prevent the gas from condensing, freezing or undergoing other changes during transmission. The design of the connector enables the gas heating sampling tube to be easily connected to other equipment or systems to achieve gas sampling and transmission. At the same time, the through hole formed by the protective tube and the connector provides a channel for the heating element to connect to an external power supply or control system, so that the heating process of the heating chamber can be effectively controlled. By connecting an external temperature controller, the temperature of the heating chamber can be precisely adjusted to meet different sampling requirements. The overall structural design of the gas heating sampling tube is designed to improve the accuracy and reliability of sampling. Through the collection cavity of the inner tube, the protection of the protective tube and the heating function of the heating chamber, it can be ensured that the sampled gas remains stable during the transmission process and is not affected by the external environment.

[0027] The connector is specifically designed to connect to the device being sampled and is designed to provide a secure and reliable connection. This ensures that the heated gas sampling tube and the device being sampled do not become loose or leak during the sampling process, ensuring stable and continuous sampling. By forming the through-hole after the protective tube and connector are connected, the need for a direct through-hole in the connector is eliminated. This thoughtful design approach, as direct through-holes in the connector could compromise the strength and seal of the connection with the device being sampled, allows the connector to better adapt to various interfaces of sampled devices, enhancing its versatility and flexibility. The protective tube, instead of having a through-hole, forms the through-hole after connection to the connector. This design avoids the potential impact of heating the entire length of the inner tube caused by a through-hole in the protective tube. Full-length heating of the inner tube is crucial for maintaining a stable temperature during the sampled gas's transmission. Opening a through-hole in the protective tube could result in heat loss, compromising heating efficiency and effectiveness. The current design allows the heat from the heating chamber to be more concentrated on the inner tube, improving heating efficiency and uniformity. Unnecessary heat loss in the protective tube is avoided, allowing the heating chamber to transfer heat to the inner tube more efficiently. This helps maintain a stable temperature for the sampled gas in the inner tube, preventing gas condensation or other physical changes. No temperature fluctuations occur at the connector, which is critical to the accuracy of gas inspection. If the temperature at the connector is unstable, it may cause the temperature of the sampled gas to change, affecting the measurement results of the physical properties and chemical composition of the gas. A stable temperature environment can reduce thermal stress on the gas heating sampling tube and connector, extending the service life of the equipment. Temperature fluctuations may cause thermal expansion and contraction of materials, causing damage or failure of the equipment. Avoiding temperature fluctuations can also reduce the cost and frequency of equipment maintenance and improve the reliability and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0029] Figure 1 This is a schematic diagram of the structure of the utility model;

[0030] Figure 2 It is a partial structural diagram of the utility model;

[0031] Figure 3 This is a schematic diagram of the internal structure of Example 1 of the present utility model;

[0032] Figure 4 This is a schematic diagram of the internal structure of Example 2 of the present utility model;

[0033] In the figure: inner tube 1, collecting chamber 101, first end tube 102, connecting end 103, second end tube 104, collecting end 105, connecting tube 106, external threaded portion boss 108, internal threaded portion through hole 110, first connecting hole 112, second connecting hole 113, protective tube 2, heating chamber 201, connector 3, through hole 301, collecting head 4, conical collecting hole 401, heating tape 5, cover 6, collecting hole 601, sealing member 7. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0035] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0036] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0037] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] Example 1

[0039] Reference Figures 1 to 3 , which is the first embodiment of the utility model, proposes a gas heating sampling tube, including an inner tube 1, the inner tube 1 has a collecting chamber 101, a protective tube 2 is arranged on the outside of the inner tube 1, the protective tube 2 and the inner tube 1 form a heating chamber 201, a connector 3 is arranged at one end of the inner tube 1, the protective tube 2 and the connector 3 form a through hole 301, and the through hole 301 is used to connect the heating chamber 201 with the external environment.

[0040] In this embodiment, the inner tube 1 has a collecting chamber 101. This collecting chamber 101 is used to accommodate the sampled gas to ensure that the gas can be effectively collected and transmitted during the sampling process. The material of the inner tube 1 has certain corrosion resistance, high temperature resistance and sealing properties to adapt to different sampling environments and gas characteristics. The protective tube 2 is arranged on the outside of the inner tube 1 and forms a heating chamber 201 with the inner tube 1. The main function of the protective tube 2 is to protect the inner tube 1 and prevent the inner tube 1 from being affected by external physical damage, chemical corrosion or other adverse factors. The heating chamber 201 between the protective tube 2 and the inner tube 1 provides an installation space for the heating element, so that the sampling tube can heat the sampled gas when needed to prevent the gas from condensing or undergoing other changes during transmission. The connector 3 is arranged at one end of the inner tube 1 for connecting the equipment to be sampled or other pipeline systems. The design of the connector 3 needs to ensure the sealing and reliability of the connection to prevent gas leakage. The protective tube 2 and the connector 3 form a through hole 301, which is used to connect the heating chamber 201 with the external environment, so that the heating element can be connected to an external power supply or control system to achieve heating control of the heating chamber 201. The protective tube 2 provides physical protection for the inner tube 1 to prevent the inner tube 1 from being subjected to external impact, wear or corrosion. At the same time, the heating element in the heating chamber 201 can heat the sampled gas to prevent the gas from condensing, freezing or other changes during the transmission process. The design of the connector 3 enables the gas heating sampling tube to be easily connected to other equipment or systems to achieve gas sampling and transmission. At the same time, the through hole 301 formed by the protective tube 2 and the connector 3 provides a channel for the heating element to connect to an external power supply or control system, so that the heating process of the heating chamber 201 can be effectively controlled. By connecting an external temperature controller, the temperature of the heating chamber 201 can be accurately adjusted to meet different sampling requirements. The overall structural design of the gas heating sampling tube is intended to improve the accuracy and reliability of sampling. Through the collection chamber 101 of the inner tube 1, the protection of the protective tube 2 and the heating function of the heating chamber 201, it can be ensured that the sampled gas remains in a stable state during the transmission process and is not affected by the external environment.

[0041] Connector 3 is specifically designed to connect to the device being sampled and is designed to provide a secure and reliable connection. This ensures that the gas-heated sampling tube and the device being sampled do not become loose or leak during the sampling process, ensuring stable and continuous sampling. By forming through-hole 301 after the protective tube 2 and connector 3 are connected, the need for a direct through-hole 301 in connector 3 is avoided. This design is highly thoughtful, as a direct hole in connector 3 could compromise the strength and sealing of the connection with the device being sampled. This design allows connector 3 to better adapt to different interfaces of sampled devices, enhancing the versatility and flexibility of the connection. By not forming through-hole 301 in the protective tube 2 but instead forming through-hole 301 after connection to connector 3, this design avoids the potential impact of heating the entire length of the inner tube 1 due to a hole in the protective tube 2. Full-length heating of the inner tube 1 is crucial to ensuring a stable temperature of the sampled gas during transmission. If a hole 301 were formed in the protective tube 2, heat loss would occur, compromising heating efficiency and effectiveness. The current design enables the heat of the heating chamber 201 to heat the inner tube 1 more concentratedly, improving the efficiency and uniformity of heating. It avoids unnecessary heat loss in the protective tube 2, allowing the heating chamber 201 to transfer heat to the inner tube 1 more effectively. This helps to maintain the temperature of the sampled gas in the inner tube 1 stable and prevent gas condensation or other physical changes. There will be no temperature fluctuations at the connector 3, which is crucial for the accuracy of gas inspection. If the temperature at the connector 3 is unstable, it may cause the temperature of the sampled gas to change, thereby affecting the measurement results of the physical properties and chemical composition of the gas. A stable temperature environment can reduce the thermal stress on the gas heating sampling tube and the connector 3, extending the service life of the equipment. Temperature fluctuations may cause thermal expansion and contraction of the material, causing damage or failure of the equipment. Avoiding temperature fluctuations can also reduce the cost and frequency of equipment maintenance and improve the reliability and stability of the equipment.

[0042] Furthermore, it also includes a collecting head 4, which is arranged at the other end of the inner tube 1. The heating belt 5 is arranged in the heating chamber 201 and is wound around the inner tube 1 and extends to the external environment through the through hole 301.

[0043] In this embodiment, a collection head 4 is located at the other end of the inner tube 1. Its primary function is to more efficiently collect the sampled gas. The design of the collection head 4 typically takes into account the gas flow characteristics and sampling requirements to better guide the gas into the collection chamber 101 of the inner tube 1. The heating cable 5 is located within the heating chamber 201 and wound around the inner tube 1. This means that the heating cable 5 tightly wraps around the inner tube 1, directly heating the gas therein. The material of the heating cable 5 typically has excellent thermal conductivity and heat resistance to ensure efficient heating. The heating cable 5 extends to the external environment through a through hole 301, allowing it to be connected to an external power source or control system to control the heating process. The design of the through hole 301 facilitates the connection of the heating cable 5 without affecting the sealing and overall structure of the heating chamber 201. The presence of the collection head 4 improves the gas collection efficiency of the gas heating sampling tube. It guides the gas more smoothly into the detection device, reducing the impact of gas flow that can affect test accuracy. The collection head 4 is particularly effective in situations with high gas flow rates or complex sampling environments.

[0044] The heating cable 5 is wound around the inner tube 1, enabling precise heating control of the sampled gas. By adjusting the power and temperature of the heating cable 5, the gas in the inner tube 1 can be heated to the appropriate temperature based on different sampling requirements and gas characteristics. This precise heating control prevents condensation, freezing, or other physical changes in the gas, ensuring gas stability and consistency during transmission. It also prevents excessive temperatures from adversely affecting gas composition. The heating cable 5 is tightly wound around the inner tube 1, ensuring more uniform heating. Compared to other heating methods, this winding method transfers heat more directly to the gas in the inner tube 1, reducing heat loss and temperature unevenness. The heating cable 5 extends to the external environment through a through hole 301, making it easier to connect and maintain. Through the through hole 301, operators can easily connect the heating cable 5 to an external power source or control system, and conveniently inspect and repair the heating cable 5 when needed. This design reduces damage to the overall structure of the gas heating sampling tube, improving the reliability and service life of the equipment.

[0045] Furthermore, the end of the collecting head 4 has a conical collecting hole 401 , and the conical collecting hole 401 is connected to the collecting chamber 101 .

[0046] In this embodiment, the smaller inlet of the conical collecting hole 401 is connected to the collecting chamber 101, and the larger outlet leads to the detection device, which reduces the impact of the fluid flow rate on the detection device, thereby ensuring detection accuracy.

[0047] Furthermore, it also includes a cover body 6, which is arranged on the collecting head 4 and located above the conical collecting hole 401, and is used to block the conical collecting hole 401. The cover body 6 has a collecting hole 601, and the conical collecting hole 401 leads to the collecting hole 601, and the collecting hole 601 leads to the detection device. The sealing member 7 is arranged between the cover body 6 and the collecting head 4, and is used for a sealed connection between the cover body 6 and the collecting head 4.

[0048] In this embodiment, the cover 6 is provided on the collecting head 4, above the conical collecting hole 401. Its main function is to block the conical collecting hole 401, and at the same time, it has a collecting hole 601, so that the conical collecting hole 401 leads to the collecting hole 601, thereby guiding the gas to the detection device. The shape and size of the cover 6 usually match the collecting head 4 to ensure good coverage and sealing effects. The seal 7 is provided between the cover 6 and the collecting head 4. Its material usually has good elasticity and sealing properties, and can form a tight connection between the cover 6 and the collecting head 4 to prevent gas leakage.

[0049] The cover 6 protects the conical collection hole 401 from external environmental influences such as dust, debris, and moisture. This helps keep the collection hole 601 clean and unobstructed, ensuring that gas can enter the sampling tube smoothly. In some harsh sampling environments, the cover 6 prevents the conical collection hole 401 from becoming clogged or damaged, thereby extending the service life of the sampling tube. The collection hole 601 on the cover 6 controls the flow of gas. It connects the conical collection hole 401 to the detection device, ensuring that the gas flows along the predetermined path, improving the accuracy and reliability of sampling. The size and shape of the collection hole 601 can be designed according to the requirements of the detection device to optimize the gas flow rate and pressure. A well-sealed connection prevents the intrusion of external air, ensuring the purity and accuracy of the sampled gas. It also prevents the sampled gas from contaminating the surrounding environment. The design of the cover 6 and seal 7 facilitates installation and removal of the sampling tube. When the sampling tube needs to be replaced or repaired, the cover 6 can be easily opened to perform the relevant operations.

[0050] Example 2

[0051] Reference Figure 4 , which is the second embodiment of the present utility model, is different from the first embodiment in that:

[0052] Compared with Example 1, further, the inner tube 1 includes a first end tube 102, the first end tube 102 has a connecting end 103, the connecting end 103 is used to connect to the connecting head 3, the second end tube 104 has a collecting end 105, the collecting end 105 is used to connect to the collecting head 4, and the connecting tubes 106 are several connected in sequence. The first end tube 102 and the second end tube 104 are arranged at the ends of the two outermost connecting tubes 106. The connecting tube 106, the first end tube 102 and the second end tube 104 all have an inner cavity, and the inner cavities are interconnected to form a collecting cavity 101.

[0053] In this embodiment, the inner tube 1 is composed of a first end tube 102, a second end tube 104 and a plurality of connecting tubes 106. The first end tube 102 has a connecting end 103 for connecting to the connector 3; the second end tube 104 has a collecting end 105 for connecting to the collecting head 4. The connecting tubes 106 are several and connected in sequence, and the first end tube 102 and the second end tube 104 are arranged at the ends of the two outermost connecting tubes 106. Such a structural design allows the inner tube 1 to be flexibly combined and adjusted according to actual needs. The connecting tube 106, the first end tube 102 and the second end tube 104 all have inner cavities, which are interconnected to form a collecting chamber 101. The collecting chamber 101 is a space for accommodating the sampled gas.

[0054] The segmented design of the inner tube 1 facilitates installation and maintenance. During installation, each section can be installed separately according to the actual situation and then connected. During maintenance, if a problem occurs in a section, it can be replaced or repaired separately without having to replace the entire inner tube 1.

[0055] By increasing or decreasing the number of connecting tubes 106, the length of the inner tube 1 can be adjusted to accommodate different sampling requirements. This flexibility allows the gas heating sampling tube to be used in different application scenarios, meeting sampling distance requirements of varying lengths. In some long-distance sampling applications, the number of connecting tubes 106 can be increased to ensure that the length of the collection chamber 101 is sufficient to accommodate the transmission of the sampled gas. Although the inner tube 1 is composed of multiple sections, the inner lumens of each section are interconnected, forming a continuous collection chamber 101. This ensures that the sampled gas can flow smoothly throughout the entire inner tube 1, without interruption or leakage due to segmentation. This design also allows the heating chamber 201 to uniformly heat the inner tube 1, ensuring a stable temperature of the sampled gas during transmission. The sequential connection of the connecting tubes 106 and the placement of the first and second end tubes 102, 104 at the outermost sides increase the overall strength and stability of the inner tube 1. This structural design can withstand certain external pressures and tensions, preventing the inner tube 1 from deforming or damaging during use. In some complex sampling environments, the inner tube 1 will be subjected to external forces. The segmented design can better disperse these forces and improve the durability of the inner tube 1.

[0056] Furthermore, one end of the connecting tube 106 has an external threaded portion and the other end has a boss 108. The boss 108 has an internal threaded portion. The external threaded portion is engaged with the internal threaded portion of another adjacent connecting tube 106. After the external threaded portion is engaged with the internal threaded portion, the inner wall of the collection chamber 101 is a smooth cylindrical surface.

[0057] In this embodiment, one end of the connecting pipe 106 has an external threaded portion and the other end has a boss 108, and the boss 108 is provided with an internal threaded portion. This design allows the connecting pipes 106 to be assembled by threaded connection. The external threaded portion is engaged with the internal threaded portion of another adjacent connecting pipe 106, and a tight connection between the two can be achieved by rotating the connecting pipe 106. This threaded connection method has the advantages of convenient installation and disassembly and firm connection. When the connecting pipes 106 are connected to each other, the external threaded portion is screwed into the internal threaded portion, so that a stable connection structure is formed between the connecting pipes 106. The threaded connection design makes the assembly and disassembly of the connecting pipe 106 very convenient. When the connecting pipe 106 needs to be installed or replaced, it is only necessary to screw the external threaded portion into the internal threaded portion, without the need for complex tools or equipment. This convenience makes the gas heating sampling tube more efficient during use and maintenance, saving time and labor costs.

[0058] The threaded connection provides strong connection force, ensuring a secure and reliable connection between the connecting tubes 106. During the sampling process, the gas-heated sampling tube may be subjected to certain external forces, such as vibration and stretching. The threaded connection effectively resists these forces, preventing the connecting tube 106 from loosening or falling off. In industrial production sites, gas-heated sampling tubes are subject to vibrations generated by equipment operation. The robustness of the threaded connection ensures the proper function of the sampling tube. After the external and internal threads engage, the inner wall of the collection chamber 101 forms a smooth cylindrical surface. This is crucial for gas sampling, as a smooth inner wall reduces resistance to gas flow, ensuring smooth passage of the sampled gas through the collection chamber 101. Furthermore, a smooth inner wall prevents eddies or turbulence during gas flow, thereby improving sampling accuracy and reliability. The threaded connection can improve the sealing performance of the sampling tube to a certain extent. When the external and internal threads are tightly engaged, a sealed connection is formed, preventing gas leakage. This excellent sealing ensures the purity and accuracy of the sampled gas and prevents the intrusion of outside air from affecting the sampling results.

[0059] Furthermore, the boss 108 has a through hole 110 for the heating tape 5 to pass through.

[0060] In this embodiment, a through-hole 110 is provided on the boss 108 at one end of the connecting tube 106. The size and shape of this through-hole 110 are typically designed based on the specifications of the heating cable 5 to facilitate smooth passage. The through-hole 110 can be circular, square, or other shapes, and should be slightly larger than the diameter or width of the heating cable 5 to ensure that the heating cable 5 does not encounter excessive resistance during passage. The presence of the through-hole 110 allows the heating cable 5 to easily pass through the boss 108 of the connecting tube 106, thereby achieving surround heating of the entire inner tube 1. When installing the heating cable 5, there is no need for complex cutting or modification of the connecting tube 106; the heating cable 5 can simply be passed through the through-hole 110 of each connecting tube 106. This design greatly improves the installation efficiency of the heating cable 5 and facilitates the assembly of the gas heating sampling tube. Once the heating cable 5 passes through the through-hole 110, the through-hole 110 serves to secure the heating cable 5. During the heating process, the heating cable 5 may move due to thermal expansion and contraction or external forces. Perforations 110 limit the range of movement of the heating cable 5, ensuring it remains in the correct position and in close contact with the inner tube 1 for effective heating. Once the heating cable 5 passes through the perforations 110, it is more evenly distributed around the inner tube 1, improving heating uniformity and efficiency. The location and number of perforations 110 can be customized to ensure that the heating cable 5 effectively heats different areas of the inner tube 1. If targeted heating is required in a specific area of ​​the inner tube 1, more perforations 110 can be added to the boss 108 of the connecting tube 106 to increase the density of the heating cable 5 and enhance heating efficiency. If the heating cable 5 malfunctions or needs to be replaced, the perforations 110 facilitate removal and replacement. Simply remove the damaged heating cable 5 from the perforations 110 and insert a new one through them. This design reduces maintenance effort and time, improving the reliability and service life of the gas heating sampling tube.

[0061] Furthermore, the protection tube 2 is a telescopic tube.

[0062] In this embodiment, the protective tube 2 is a telescopic tube, which means that it has a retractable property. A telescopic tube is usually composed of multiple nested parts, which can be stretched or compressed as needed to change its length. The design of the protective tube 2 as a telescopic tube allows the gas heating sampling tube to adapt to different length requirements. In actual applications, sampling paths of different lengths or installation space limitations may be encountered. The telescopic tube can be adjusted according to the specific situation to ensure that the protective tube 2 can completely cover the inner tube 1 and provide effective protection. The retractability of the telescopic tube makes the installation and disassembly of the gas heating sampling tube more convenient. During installation, the protective tube 2 can be compressed to a shorter length first, and then after the inner tube 1 and other components are installed, the protective tube 2 can be stretched to the appropriate length for covering. During disassembly, the protective tube 2 can also be compressed to facilitate the removal of the inner tube 1 and other components. This design reduces the difficulty of installation and disassembly and improves work efficiency.

[0063] The protective tube 2 primarily protects the inner tube 1 and heating cable 5 from external environmental influences. As a telescopic tube, it adapts to the changing shapes of the inner tube 1 and heating cable 5, providing tighter coverage and protection. During transportation and use, the protective tube 2 protects the inner tube 1 and heating cable 5 from damage such as collisions, abrasion, and corrosion, thereby extending the service life of the heated gas sampling tube. The telescopic tube design increases the flexibility and adaptability of the heated gas sampling tube. It can be adjusted to suit different application scenarios and requirements, meeting a variety of complex sampling conditions.

[0064] Furthermore, the side wall of the protection tube 2 has a first connection hole 112, and the side wall of the collecting head 4 has a second connection hole 113, and further includes

[0065] The locking bolt passes through the first connecting hole 112 and the second connecting hole 113 and is used to fix the protective tube 2 and the collecting head 4.

[0066] In this embodiment, the sidewall of the protective tube 2 has a first connection hole 112, and the sidewall of the collecting head 4 has a second connection hole 113. These two connection holes are positioned correspondingly and are used to install locking bolts. The locking bolts penetrate the first and second connection holes 112, 113, securing the protective tube 2 to the collecting head 4. The locking bolts provide a reliable connection, firmly securing the protective tube 2 and collecting head 4. During use of the gas-heated sampling tube, it is important to ensure a stable connection between the various components to prevent gas leakage or inaccurate sampling. In environments with high vibration, the locking bolts prevent loosening between the protective tube 2 and collecting head 4, ensuring proper operation of the sampling tube. While the locking bolts provide a secure hold, they also allow for easy removal for maintenance or component replacement. The protective tube 2 can be separated from the collecting head 4 by simply loosening the locking bolts. This design makes the installation and removal of the gas-heated sampling tube more convenient and improves work efficiency. By adjusting the tightening of the locking bolts, the tube can be adapted to different sizes and shapes of protective tubes 2 and collecting heads 4. This allows for flexibility in the design and manufacturing of the heated gas sampling tube, enabling it to meet diverse application requirements. When the locking bolts are tightened, a tight connection is formed between the protective tube 2 and the collection head 4, enhancing the sealing properties of the sampling tube. This excellent sealing prevents gas leakage and ensures the accuracy of sampling results.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A gas heating sampling tube, characterized in that: include An inner tube (1), the inner tube (1) having a collecting chamber (101), a protective tube (2), the protective tube (2) being arranged outside the inner tube (1), the protective tube (2) and the inner tube (1) forming a heating chamber (201), A connector (3), the connector (3) being arranged at one end of the inner tube (1), the protective tube (2) and the connector (3) forming a through hole (301), the through hole (301) being used to connect the heating chamber (201) with the external environment.

2. A gas heating sampling tube according to claim 1, characterized in that: Also includes A collecting head (4), the collecting head (4) being arranged at the other end of the inner tube (1), A heating tape (5) is provided in the heating chamber (201), is wound around the inner tube (1), and extends from the through hole (301) to the external environment.

3. A gas heating sampling tube according to claim 2, characterized in that: The end of the collecting head (4) has a conical collecting hole (401), and the conical collecting hole (401) is connected to the collecting chamber (101).

4. A gas heating sampling tube according to claim 3, characterized in that: Also includes a cover (6), the cover (6) being arranged on the collecting head (4) and located above the conical collecting hole (401), and being used to block the conical collecting hole (401); the cover (6) having a collecting hole (601), the conical collecting hole (401) leading to the collecting hole (601), and the collecting hole (601) leading to the detection device; A sealing member (7), the sealing member (7) being arranged between the cover body (6) and the collecting head (4) and used for sealing the connection between the cover body (6) and the collecting head (4).

5. The gas heating sampling tube according to claim 2, characterized in that: The inner tube (1) comprises A first end tube (102), the first end tube (102) having a connecting end (103), the connecting end (103) being used to connect to the connector (3), A second end tube (104), the second end tube (104) having a collecting end (105), the collecting end (105) being used to connect to the collecting head (4), A connecting tube (106), wherein the connecting tubes (106) are connected in sequence, the first end tube (102) and the second end tube (104) are arranged at the ends of the two outermost connecting tubes (106), and the connecting tube (106), the first end tube (102) and the second end tube (104) all have inner cavities, and the inner cavities are interconnected to form the collecting chamber (101).

6. The gas heating sampling tube according to claim 5, characterized in that: One end of the connecting tube (106) has an external threaded portion, and the other end has a boss (108), the boss (108) has an internal threaded portion, the external threaded portion is engaged with the internal threaded portion of another adjacent connecting tube (106), and after the external threaded portion is engaged with the internal threaded portion, the inner wall of the collecting chamber (101) is a smooth cylindrical surface.

7. The gas heating sampling tube according to claim 6, characterized in that: The boss (108) has a through-hole (110), and the through-hole (110) is used for the heating tape (5) to pass through.

8. The gas heating sampling tube according to claim 1, characterized in that: The protective tube (2) is a telescopic tube.

9. The gas heating sampling tube according to claim 2, characterized in that: The side wall of the protection tube (2) has a first connection hole (112), the side wall of the collecting head (4) has a second connection hole (113), and further includes A locking bolt, which passes through the first connecting hole (112) and the second connecting hole (113) and is used to fix the protective tube (2) and the collecting head (4).

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