Compact high-temperature fuel gas sampler structure

Abstract

The invention belongs to the technical field of gas turbine high-temperature fuel gas samplers, and particularly relates to a compact high-temperature fuel gas sampler structure which is of an integrally-formed straight pipe structure, a plurality of fuel gas sampling holes are formed in the pipe wall of the sampler structure, and the fuel gas sampling holes are formed in the length direction of the sampler structure; two cooling cavities are formed in the pipe wall of the sampler structure, the two cooling cavities are communicated through a communicating hole at the closed end of the sampler structure, and the ends, away from the communicating hole, of the two cooling cavities are connected with a cooling water inlet connector and a cooling water outlet connector respectively. The structure of the scheme has the advantages of small and compact structure, high overall structural strength, good cooling design effect and simple processing mode. The gas sampler has the advantage of small and compact structure, so that the gas sampler can be applied to severe condition scenes of complex industrial environments and narrow available spaces, and the adaptive scenes are wide. The gas sampler has the advantage of high overall structural strength, and the service life of the gas sampler is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of high-temperature fuel gas samplers for gas turbines, and in particular relates to a compact high-temperature fuel gas sampler structure. Background Art

[0002] Gas samplers are very common in the fields of industry and scientific research, and are generally used in scenarios where combustion products need to be detected and analyzed, such as: gas component analysis of gas turbine combustion chambers, automobile engine combustion exhaust detection and analysis, boiler combustion emission pollution detection, and combustion flow field component analysis in the field of scientific research. In addition, according to different application scenarios, gas samplers have a variety of structures. Among them, the high-temperature gas sampler structure design is the most difficult, which can be directly applied to 1500K~2100K combustion scenarios and perform multi-point sampling. Since the gas sampler in this combustion scenario must be cooled by water, it is necessary to design a column structure with two channels for gas sampling and water cooling. In addition, multi-point sampling will cause the sampler to form a complex multi-connected area, resulting in difficulty in cooling structure design.

[0003] Traditional high-temperature gas multi-point samplers generally adopt a D-shaped double-layer column structure formed by metal sheet metal and welding. This structure has the following disadvantages: ① Due to the limitations of welding processing technology, the volume of the column cannot be too streamlined, and the windward cross-sectional area of ​​the gas sampler is relatively large, resulting in a high flow field blockage ratio, which not only interferes with the flow field but also limits the number of gas samplers that can be configured in a limited space; ② Metal sheet metal + welding forming, many welds, and a high processing scrap rate; ③ Thin wall, hollow, large volume, and poor overall structural strength; ④ The application scenario where high combustion temperature and water cooling coexist makes the internal temperature distribution of the gas sampler uneven, and the temperature difference between the inner and outer layers is large. The welds are therefore easily torn and damaged due to temperature stress, resulting in a short sampler life.

[0004] Therefore, it is necessary to design a compact high-temperature gas sampler structure with a compact structure volume, high structural strength, and avoiding welds. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a compact high-temperature gas sampler structure.

[0006] The technical solution adopted by the present invention is: A compact high-temperature gas sampler structure is an integrally formed straight tube structure, one end of the sampler structure is closed, and the other end has a sample gas outlet joint; a plurality of gas sampling holes are arranged on the tube wall of the sampler structure, the gas sampling holes are connected with the sample gas outlet joint through the tube cavity of the sampler structure, and the plurality of gas sampling holes are arranged along the length direction of the sampler structure; two cooling cavities are arranged in the tube wall of the sampler structure, the two cooling cavities are connected through a connecting hole at the closed end of the sampler structure, and the ends of the two cooling cavities away from the connecting hole are respectively connected with a cooling water inlet joint and a cooling water outlet joint.

[0007] As an alternative or supplement to the above structure, the cross-sections of the two cooling chambers are C-shaped.

[0008] As an alternative or supplement to the above structure: the tube wall of the sampler structure includes an outer metal wall, an inner metal wall and a partition metal wall; the outer metal wall is located radially outside the cooling cavity, and the inner metal wall is located radially inside the cooling cavity; the partition metal wall is located between the two cooling cavities to separate the two cooling cavities.

[0009] As an alternative or supplement to the above structure: two partition metal walls are arranged between the two cooling chambers, and the gas sampling hole passes through one of the partition metal walls along the radial direction of the sampler structure.

[0010] As an alternative or supplement to the above structure: the communicating hole is arranged at one end of the partitioning metal wall close to the closed end of the sampler structure.

[0011] As an alternative or supplement to the above structure: the sample gas outlet joint is located between the cooling water inlet joint and the cooling water outlet joint, and the cooling water inlet joint and the cooling water outlet joint are distributed in a mirror image with the center of the sample gas outlet joint.

[0012] As an alternative or supplement to the above structure: the outer metal wall, the inner metal wall, the partition metal wall, the cooling water inlet joint, the cooling water outlet joint and the sample gas outlet joint are printed as one piece using a 3D printing process based on high-temperature metal powder.

[0013] The beneficial effects of the present invention are: 1. The structure of this solution is processed by an integrated molding process, which has the advantages of small and compact structure, high overall structural strength, good cooling design effect, and simple processing method. Its small and compact structure makes the gas sampler applicable in harsh conditions such as complex industrial environments and narrow available spaces, making it suitable for a wide range of scenarios. Its high overall structural strength increases the service life of the gas sampler.

[0014] 2. The two cooling chambers are connected at the connecting hole, so that the cooling water can fully cool the sampler structure. The good cooling effect ensures the application of the sampler in the high-temperature gas environment of 1500K~2100K. Its one-piece molding processing method makes its processing method simple and improves the yield rate and finished product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0016] Figure 1 It is the internal structure diagram of the compact high-temperature gas sampler structure in this scheme; Figure 2 yes Figure 1 Middle AA section; Figure 3 yes Figure 1 Middle BB cross section.

[0017] In the figure: 1-outer metal wall; 2-inner metal wall; 3-partition metal wall; 4-flange seat; 5-cooling water inlet joint; 6-cooling water outlet joint; 7-sample gas outlet joint; 8-connecting hole; 9-gas sampling hole. DETAILED DESCRIPTION

[0018] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0019] like Figures 1 to 3 As shown, this embodiment designs a compact high-temperature gas sampler structure, and the sampler structure is an integrally formed straight tube structure. Since the sampler structure is processed by an integral molding process, its volume can be processed to be smaller, while welding often cannot process smaller parts. The integrally processed sampler structure has the advantages of small and compact structure, high overall structural strength, good cooling design effect, and simple processing method. The advantage of its small and compact structure makes the gas sampler applicable in complex industrial environments and harsh conditions with narrow available space, making it suitable for a wide range of scenarios. The advantage of its high overall structural strength increases the service life of the gas sampler. Its one-piece molding processing method makes its processing method indirect, while improving the yield and quality of finished products.

[0020] One end of the sampler structure is closed and the other end is provided with a sample gas outlet connector 7. The gas sampling hole 9 on the sampler structure is connected with the sample gas outlet connector 7 through the tube cavity of the sampler structure. When the sampler structure is inserted into the high-temperature fuel gas of the gas turbine, the gas sampling hole 9 on the tube wall of the sampler structure can be used to sample the high-temperature fuel gas, and then the gas is sent to the detection device through the sample gas outlet connector 7.

[0021] A plurality of gas sampling holes 9 are arranged on the tube wall of the sampler structure, and the plurality of gas sampling holes 9 are arranged along the length direction of the sampler structure; thus, different gas sampling holes 9 are used to perform multi-point sampling of the high-temperature gas flow of the gas turbine.

[0022] Two cooling chambers are arranged in the tube wall of the sampler structure, and the two cooling chambers are connected through a connecting hole 8 at the closed end of the sampler structure, and the ends of the two cooling chambers away from the connecting hole 8 are respectively connected with a cooling water inlet joint 5 and a cooling water outlet joint 6. Through the two cooling chambers, the sampler structure can be fully cooled by cooling water, and its good cooling effect ensures the application of the sampler in a high-temperature gas environment of 1500K~2100K.

[0023] The cross-sections of the two cooling cavities are C-shaped, thereby increasing the surface area of ​​the cooling cavity, improving the cooling efficiency, and at the same time ensuring that there is no cooling dead corner in the entire flow area.

[0024] The tube wall of the sampler structure includes an outer metal wall 1, an inner metal wall 2 and a partition metal wall 3; the outer metal wall 1 is located on the radial outside of the cooling cavity, and the inner metal wall 2 is located on the radial inside of the cooling cavity; the partition metal wall 3 is located between the two cooling cavities to separate the two cooling cavities. With the partition metal wall 3 as the center, the total cooling channel is divided into two halves (two cooling cavities) by the partition metal wall 3, and at the same time, a connecting hole is opened at the farthest end of the partition wall from the cooling water inlet to connect the two cooling cavities, and the cooling water flows along the column direction of the sampling points (the arrangement direction of the gas sampling holes 9) to achieve flow cooling. This cooling structure has good cooling effect and compact structure, and perfectly realizes the cooling effect of the multi-connected areas of the multi-point sampler; Two partition metal walls 3 are arranged between the two cooling chambers, and the gas sampling hole 9 penetrates one of the partition metal walls 3 along the radial direction of the sampler structure, so that the cooling water can start to cool the high-temperature gas entering the gas sampling hole 9 when cooling.

[0025] The communicating hole 8 is arranged at one end of the partition metal wall 3 close to the closed end of the sampler structure.

[0026] The cooling water inlet joint 5 and the cooling water outlet joint 6 can both be elbow structures. The sample gas outlet joint 7 is located between the cooling water inlet joint 5 and the cooling water outlet joint 6, and the cooling water inlet joint 5 and the cooling water outlet joint 6 are distributed in a mirror image with the center of the sample gas outlet joint 7. This facilitates the external connection of the cooling water inlet joint 5, the cooling water outlet joint 6 and the sample gas outlet joint 7, and reduces the mutual interference of different water pipes and gas pipes.

[0027] The outer metal wall 1, the inner metal wall 2, the partition metal wall 3, the cooling water inlet joint 5, the cooling water outlet joint 6 and the sample gas outlet joint 7 are integrally printed by a 3D printing process based on high-temperature metal powder. The advantages of the 3D printing process based on high-temperature metal powder are fully utilized, so that the sampler structure can be designed as a small and compact structure. The small cross-sectional area of ​​the sampler structure will cause a smaller blockage ratio and less interference to the flow field. It can be used even in confined spaces, so that it can be more widely used in various industrial projects and scientific research topics, expanding the application scenarios. The sampler structure will not form welds, which can effectively avoid the negative effects caused by open welding, fractures and leakage in the welding part of the sampler, improve the safety of the sampler, and extend the service life of the sampler. The problem of the difficulty of designing the complex multi-connected regional cooling structure faced by the existing high-temperature and multi-point samplers is solved. The cooling cavity design of the sampler structure in this scheme is exquisite and efficient.

[0028] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. A compact high-temperature gas sampler structure, characterized in that: The sampler structure is an integrally formed straight tube structure, one end of the sampler structure is closed and the other end has a sample gas outlet connector (7); a plurality of gas sampling holes (9) are arranged on the tube wall of the sampler structure, the gas sampling holes (9) are connected to the sample gas outlet connector (7) through the tube cavity of the sampler structure, and the plurality of gas sampling holes (9) are arranged along the length direction of the sampler structure; two cooling cavities are arranged in the tube wall of the sampler structure, the two cooling cavities are connected at the closed end of the sampler structure through a connecting hole (8), and the ends of the two cooling cavities away from the connecting hole (8) are respectively connected to a cooling water inlet connector (5) and a cooling water outlet connector (6).

2. The compact high-temperature gas sampler structure according to claim 1 is characterized in that: The cross sections of the two cooling chambers are C-shaped.

3. The compact high-temperature gas sampler structure according to claim 1 is characterized in that: The tube wall of the sampler structure comprises an outer metal wall (1), an inner metal wall (2) and a partition metal wall (3); the outer metal wall (1) is located radially outside the cooling cavity, and the inner metal wall (2) is located radially inside the cooling cavity; the partition metal wall (3) is located between the two cooling cavities to separate the two cooling cavities.

4. The compact high-temperature gas sampler structure according to claim 3 is characterized in that: Two partition metal walls (3) are arranged between the two cooling chambers, and the gas sampling hole (9) penetrates one of the partition metal walls (3) along the radial direction of the sampler structure.

5. The compact high-temperature gas sampler structure according to claim 3 is characterized in that: The communication hole (8) is arranged at one end of the partition metal wall (3) close to the closed end of the sampler structure.

6. The compact high-temperature gas sampler structure according to any one of claims 1 to 5, characterized in that: The sample gas outlet connector (7) is located between the cooling water inlet connector (5) and the cooling water outlet connector (6), and the cooling water inlet connector (5) and the cooling water outlet connector (6) are distributed in a mirror image with respect to the center of the sample gas outlet connector (7).

7. The compact high-temperature gas sampler structure according to any one of claims 3 to 5, characterized in that: The outer metal wall (1), the inner metal wall (2), the partition metal wall (3), the cooling water inlet joint (5), the cooling water outlet joint (6) and the sample gas outlet joint (7) are integrally printed using a 3D printing process based on high-temperature metal powder.

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