Gas circuit structure for gas detection

Abstract

The utility model relates to the field of detection equipment, in particular to a gas circuit structure for gas detection, which comprises a gas guide block, a gas pump and a test sensor, the gas guide block is provided with a gas inlet pressure groove and a gas outlet pressure groove, and the gas circuit structure also comprises a gas inlet pressure sensor arranged in the gas inlet pressure groove and a gas outlet pressure sensor arranged in the gas outlet pressure groove; the air guide block is provided with an air inlet cavity communicated with the air inlet pressure groove and a first air cavity, the ends, away from the air inlet pressure groove, of the air inlet cavity and the first air cavity penetrate through the air guide block, and the first air cavity is communicated with an inlet of the air pump. One end of the second air cavity is communicated with an outlet of the air pump, the other end of the second air cavity is communicated with an inlet of the test sensor, one end of the third air cavity is communicated with an outlet of the test sensor, the other end of the third air cavity is communicated with the air outlet pressure groove, and one end of the fourth air cavity is communicated with the air outlet pressure groove, and the other end of the fourth air cavity penetrates through the air guide block. According to the utility model, the structural form of the gas circuit is improved, so that the existing problems are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment, and in particular to a gas path structure for gas detection. Background Technology

[0002] Gas detection equipment, such as oxygen content analyzers, requires extracting the target gas from the sample during gas detection, allowing the gas to enter the test sensor (such as a spectral test sensor). Some existing gas test sensors, such as the puncture-type packaging bag oxygen analyzer disclosed in utility model patent CN220626255U, use pneumatic components (vacuum cylinder or air pump) to draw gas from the insertion point of the suction needle into the test sensor (test chamber) to complete the detection.

[0003] The applicant found that the gas circuits of existing gas detection devices are mostly directly connected to test sensors and pneumatic components through pipes. When it is necessary to monitor the pressure in the gas circuit, pressure sensors need to be installed in the gas circuit, which results in a large number of gas circuit joints and a complicated structure. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a gas path structure for gas detection, which effectively solves the existing problems by improving the structure of the gas path.

[0005] To address the aforementioned problems, this utility model provides a gas path structure for gas detection, including a gas guide block, a gas pump, and a test sensor. The gas guide block has a monitoring surface, and the monitoring surface is provided with an inlet pressure groove and an outlet pressure groove. The gas path structure also includes an inlet pressure sensor installed in the inlet pressure groove and an outlet pressure sensor installed in the outlet pressure groove. The gas guide block has an inlet chamber and a first gas chamber connected to the inlet pressure groove. The ends of the inlet chamber and the first gas chamber away from the inlet pressure groove pass through the gas guide block. The first gas chamber is connected to the inlet of the gas pump. The gas guide block also has a second, a third, and a fourth gas chamber. One end of the second gas chamber is connected to the outlet of the gas pump, and the other end is connected to the inlet of the test sensor. One end of the third gas chamber is connected to the outlet of the test sensor, and the other end is connected to the outlet pressure groove. One end of the fourth gas chamber is connected to the outlet pressure groove, and the other end passes through the gas guide block.

[0006] Furthermore, the gas path structure includes a circuit board, and the inlet pressure sensor and the outlet pressure sensor are mounted on the circuit board.

[0007] Furthermore, both the edge of the inlet pressure groove and the edge of the outlet pressure groove are provided with mounting ring grooves, and the air passage structure also includes a sealing ring installed in the mounting ring groove.

[0008] Furthermore, the circuit board is fixed to the air guide block by screws.

[0009] Furthermore, the air intake chamber extends through the air guide block on the side of the air guide block away from the test sensor.

[0010] Furthermore, the monitoring surface is disposed between the side of the air guide block where the test sensor and the first air chamber opening are located, and the air pump is installed on the side of the air guide block opposite to the monitoring surface.

[0011] Furthermore, the air pump is fixed to the air guide block by screws, and the air pump has an inlet and an outlet respectively provided with air guide pipes, which are inserted into the first air chamber and the second air chamber respectively.

[0012] Furthermore, the test sensor is fixed to the air guide block by screws.

[0013] The beneficial effect of this utility model is that it effectively solves the existing problems by improving the structure of the air passage. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 for Figure 1 The illustrated embodiment shows a schematic diagram of the gas flow path of the gas path structure.

[0017] Figure 3 for Figure 1 The illustrated embodiment shows a schematic diagram of the air guide block from another perspective.

[0018] Figure 4 for Figure 1 The illustrated embodiment is shown as a side cross-sectional view of the third air chamber.

[0019] Figure 5 for Figure 1 A schematic diagram of the circuit board in the illustrated embodiment.

[0020] The components are: 1. Air guide block; 2. Air pump; 3. Test sensor; 4. Monitoring surface; 5. Inlet pressure groove; 6. Outlet pressure groove; 7. Inlet pressure sensor; 8. Outlet pressure sensor; 9. Inlet chamber; 10. First air chamber; 11. Second air chamber; 12. Third air chamber; 13. Fourth air chamber; 14. Circuit board; 15. Mounting ring groove; 16. Sealing ring; 17. Air guide pipe. Detailed Implementation

[0021] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0022] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0023] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] In this utility model, such as Figures 1 to 5 As shown, a gas path structure for gas detection is provided, including a gas guide block 1, a gas pump 2, and a test sensor 3. The gas guide block 1 has a monitoring surface 4, and the monitoring surface 4 is provided with an inlet pressure groove 5 and an outlet pressure groove 6. The gas path structure also includes an inlet pressure sensor 7 installed in the inlet pressure groove 5 and an outlet pressure sensor 8 installed in the outlet pressure groove 6. The gas guide block 1 has an inlet chamber 9 and a first gas chamber 10 communicating with the inlet pressure groove 5. The inlet chamber 9 and the first gas chamber 10 are located away from the gas pump 2. One end of the inlet pressure groove 5 passes through the air guide block 1, and the first air chamber 10 is connected to the inlet of the air pump 2. The air guide block 1 is also provided with a second air chamber 11, a third air chamber 12 and a fourth air chamber 13. One end of the second air chamber 11 is connected to the outlet of the air pump 2 and the other end is connected to the inlet of the test sensor 3. One end of the third air chamber 12 is connected to the outlet of the test sensor 3 and the other end is connected to the outlet pressure groove 6. One end of the fourth air chamber 13 is connected to the outlet pressure groove 6 and the other end passes through the air guide block 1.

[0027] The gas path structure of this utility model uses a gas guide block 1 to form a gas path consisting of an inlet chamber 9, an inlet pressure groove 5, a first gas chamber 10, an air pump 2, a second gas chamber 11, a test sensor 3, a third gas chamber 12, an outlet pressure groove 6, and a fourth gas chamber 13. This structure not only satisfies the testing requirements for the inlet and outlet pressures of the test sensor 3, but also reduces the number of pipe joints required for connecting the pressure sensor, simplifying the structure compared to installing the pressure sensor on a pipeline. Furthermore, the use of the gas guide block 1 to process the gas path ensures the stability of the entire gas path structure, which can be used both as a gas guide and as a support structure for installation.

[0028] In a preferred embodiment, specifically regarding the structure of this utility model, the air path structure includes a circuit board 14, and the intake pressure sensor 7 and the outlet pressure sensor 8 are mounted on the circuit board 14. As shown in the figure, the intake pressure sensor 7 and the outlet pressure sensor 8 can be integrated by mounting the circuit board 14.

[0029] In a preferred embodiment, more specifically regarding the structure of this utility model, both the edge of the inlet pressure groove 5 and the edge of the outlet pressure groove 6 are provided with mounting ring grooves 15, and the air passage structure further includes a sealing ring 16 installed in the mounting ring groove 15.

[0030] As shown in the figure, by setting a sealing ring 16 in the mounting ring groove 15, the airtightness of the circuit board 14 at the mating position with the air inlet pressure groove 5 and the air outlet pressure groove 6 can be improved.

[0031] In a preferred embodiment, more specifically regarding the structure of this utility model, the circuit board 14 is fixed to the air guide block 1 by screws.

[0032] As shown in the figure, this facilitates the assembly and disassembly of the circuit board 14. In optional embodiments, other methods can also be used to fix the circuit board 14 and the air guide block 1. For example, the circuit board 14 can be fixed to the air guide block 1 using a snap-fit ​​connection, or by bonding or welding.

[0033] In a preferred embodiment, more specifically regarding the structure of this invention, the air intake chamber 9 penetrates the air guide block 1 on the side of the air guide block 1 away from the test sensor 3. As shown in the figure, this arrangement allows a sampling tube (such as a sampling needle) to be installed on the side of the air intake chamber 9 away from the test sensor 3, thereby reducing mutual dryness between the sampling tool and the test sensor 3.

[0034] In a preferred embodiment, specifically regarding the structure of this utility model, the monitoring surface 4 is disposed between the side of the air guide block 1 where the test sensor 3 and the opening of the first air chamber 10 are located, and the air pump 2 is installed on the side of the air guide block 1 opposite to the monitoring surface 4. As shown in the figure, the monitoring surface 4 is disposed on the top surface of the air guide block 1, and the air pump 2 is installed on the bottom surface of the air guide block 1, thereby efficiently utilizing the space of the air guide block 1 to facilitate the assembly of the circuit board 14, the air pump 2, and the test sensor 3. As shown in the figure, the side of the air pump 2 is provided with a fixing ear plate, and the ear plate is provided with fixing holes, and screws are fixed to the air guide block 1 from the position of the ear plate.

[0035] In a preferred embodiment, more specifically regarding the structure of this utility model, the air pump 2 is fixed to the air guide block 1 by screws, and the air pump 2 has an air guide pipe 17 at its inlet and outlet, respectively, and the two air guide pipes 17 are respectively inserted into the first air chamber 10 and the second air chamber 11.

[0036] As shown in the figure, the air guide tube 17 of the air pump 2 can be directly connected to the first air chamber 10 and the second air chamber 11, which facilitates the connection between the air pump 2 and the entire air circuit.

[0037] In a preferred embodiment, specifically regarding the structure of this invention, the test sensor 3 is fixed to the air guide block 1 by screws. As shown in the figure, a fixing block is provided on the side of the test sensor 3, and the fixing block has fixing holes, with screws fixing it to the air guide block 1 at the fixing holes.

[0038] It should be noted that the accompanying drawings show a sampling needle structure connected to the air intake chamber 9. The sampling needle and the opening of the air intake chamber 9 can be connected by an interference fit. This is only one example of the present invention and is not intended to limit the sampling structure at the air intake chamber 9. Those skilled in the art can flexibly choose existing sampling structures during implementation. In the accompanying drawings, screw fixing holes are drawn below the fixing positions of the air pump 2 and the test sensor 3. Those skilled in the art can directly install and fix the device using screws at the corresponding fixing hole positions. Figure 4 The diagram shows the insertion connection method in which the outlet of the test sensor 3 is connected to the third air chamber 12. The connection method between the inlet of the test sensor 3 and the second air chamber 11 can be referred to this method.

[0039] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0040] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A gas passage structure for gas detection, characterized by comprising: The air guide block is provided with a monitoring surface, an air inlet pressure groove and an air outlet pressure groove, and the air path structure further comprises an air inlet pressure sensor installed in the air inlet pressure groove and an air outlet pressure sensor installed in the air outlet pressure groove. The air guide block is provided with an air inlet cavity and a first air cavity which are communicated with the air inlet pressure groove, and the air inlet cavity and the first air cavity penetrate the air guide block at one end away from the air inlet pressure groove. The air guide block is further provided with a second air cavity, a third air cavity and a fourth air cavity, one end of the second air cavity is communicated with the outlet of the air pump, the other end is communicated with the inlet of the test sensor, one end of the third air cavity is communicated with the outlet of the test sensor, the other end is communicated with the air outlet pressure groove, and one end of the fourth air cavity is communicated with the air outlet pressure groove, the other end penetrates the air guide block.

2. The gas passage structure for gas detection according to claim 1, wherein The air path structure comprises a circuit board, and the air inlet pressure sensor and the air outlet pressure sensor are installed on the circuit board.

3. The gas passage structure for gas detection according to claim 2, wherein The edges of the air inlet pressure groove and the air outlet pressure groove are provided with mounting ring grooves, and the air path structure further comprises sealing rings installed in the mounting ring grooves.

4. The gas passage structure for gas detection according to claim 3, wherein The circuit board is fixed on the air guide block by screws.

5. The gas passage structure for gas detection according to claim 1, wherein The air inlet cavity penetrates the air guide block at the side of the air guide block away from the test sensor.

6. The gas passage structure for gas detection according to claim 5, wherein The monitoring surface is arranged between the side of the air guide block where the test sensor and the first air cavity are arranged, and the air pump is installed on the opposite side of the air guide block.

7. The gas passage structure for gas detection according to claim 1, wherein The air pump is fixed on the air guide block by screws, and the inlet and outlet of the air pump are respectively provided with air guide pipes which are respectively inserted into the first air cavity and the second air cavity.

8. The gas passage structure for gas detection according to claim 1, wherein The test sensor is fixed on the air guide block by screws.

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