A high-precision gas analyzer

Abstract

The utility model relates to gas infrared gas analyzer technical field, and disclose a kind of high-precision gas analyzer.The high-precision gas analyzer includes: flue pipe, the inside fixed mounting of flue pipe has fixed plate, the top fixed mounting of flue pipe has top cover, the outside fixed mounting of flue pipe has support ring, the top fixed mounting of support ring has PLC controller, the left side of flue pipe is inserted and installed with infrared gas analyzer, the left side of flue pipe is inserted and installed with barometer, barometer is located the top of fan blade, the air pressure size below the fixed plate in flue pipe can be monitored in real time, and monitoring data is transmitted to PLC controller, set air pressure threshold interval by PLC controller, by PLC controller to compare actual data with set threshold value, and according to comparison data to adjust the rotational speed of driving motor and the rotation angle of movable plate, to adjust internal flue gas air pressure, so that air pressure is kept at proper size, to facilitate infrared gas analyzer to analyze flue gas.

Description

Technical Field

[0001] This utility model relates to the technical field of gas infrared gas analyzers, specifically a high-precision gas analyzer. Background Technology

[0002] Infrared sensors utilize the unique absorption characteristics of different gases for electromagnetic wave energy of infrared wavelengths to analyze gas composition and content. Infrared radiation generally refers to electromagnetic radiation with wavelengths ranging from 0.76 to 1000 μm, while the infrared wavelengths actually used are approximately 1 to 50 μm. The data processing section is responsible for converting the electrical signals output by the sensor into digital signals for analysis. The data processor receives the electrical signals output by the sensor, processes these signals through a series of algorithms, and finally outputs the gas concentration results.

[0003] The existing Chinese utility model patent with publication number CN212301028U discloses a high-temperature flue gas analysis device with gas sample pressure stabilization function. It includes a flue gas sampling probe extending into the kiln tail flue gas chamber, a gas jet pump connected to the sampling probe, a steam-water separator, a primary gravity-flow pressure stabilization module, and a gas infrared analyzer. The primary gravity-flow pressure stabilization module includes a dehumidifier and a filter connected in series, a primary gravity-flow pressure stabilization tank connected to both, and a drainage tank connected to the primary gravity-flow pressure stabilization tank. The primary gravity-flow pressure stabilization tank has a primary water inlet at the bottom and a primary water outlet on the upper side of the tank. The primary water inlet is connected to a water supply pipe via a primary water inlet pipe. The primary gravity-flow pressure stabilization tank in the primary gravity-flow pressure stabilization module, through a bottom water supply and upper overflow drainage method, automatically maintains the flue gas sample of the volume content to be analyzed at the same level of millimeters of water column, achieving pressure stabilization.

[0004] The flue gas pressure inside the kiln tail flue chamber changes due to the operating conditions of the rotary kiln. At the same time, the existing gas analysis structure cannot adjust the flue gas pressure inside the kiln tail flue chamber in real time, which affects the analysis accuracy of the gas infrared gas analyzer. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a high-precision gas analyzer that has the advantages of avoiding the influence of rotary kiln operating conditions on flue gas pressure and being able to adjust the internal flue gas pressure in real time, thus solving the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-precision gas analyzer, comprising: a flue, a fixed plate fixedly installed inside the flue, a top cover fixedly installed at the top of the flue, a support ring fixedly installed on the outside of the flue, a PLC controller fixedly installed above the support ring, an infrared gas analyzer inserted through the left side of the flue, a barometer inserted through the left side of the flue, a fixed frame fixedly installed inside the flue, a drive motor fixedly installed inside the fixed frame, fan blades fixedly installed on the outside of the drive motor's shaft, a limit bearing fitted into the center of the top cover, a transmission shaft inserted through the limit bearing, a connecting frame fixedly installed above the top cover, a stepper motor fixedly installed inside the connecting frame, a movable plate fixedly installed at the bottom end of the transmission shaft, and a connecting bearing fixedly installed below the movable plate; the flue can restrict the direction of flue gas movement.

[0009] As a preferred embodiment of this utility model, the top end of the flue is a 90-degree structure, and the surface of the fixing plate is provided with an opening structure distributed in a ring around the center of the fixing plate; the fixing plate can limit the airflow.

[0010] As a preferred embodiment of this invention, the bottom surface of the infrared gas analyzer is fixedly connected to the support ring, the barometer passes through the flue pipe, and its end is located at the center of the vertical part of the flue pipe; the infrared gas analyzer is capable of analyzing the composition of the flue gas.

[0011] As a preferred embodiment of this utility model, the fixing frame is symmetrically installed on the upper and lower sides of the drive motor with the center of the drive motor as the reference, and the drive motor is fixedly connected to the smoke pipe through the fixing frame; the drive motor can drive the fan blades to rotate.

[0012] As a preferred embodiment of this utility model, the fan blade is located at the center of the vertical structure of the flue, the transmission shaft is rotatably connected to the top cover through a limiting bearing, and the top end of the transmission shaft is fixedly connected to the rotating shaft of the stepper motor; the fan blade can drive the flue gas to move upward.

[0013] As a preferred embodiment of this utility model, the stepper motor is fixedly connected to the top cover via a connecting frame, and the bottom end of the transmission shaft is fixedly connected to the movable plate via an insertion method; the transmission shaft can drive the movable plate to rotate.

[0014] As a preferred technical solution of this utility model, a vertically downward protruding structure is provided at the center of the bottom end of the movable plate, and the movable plate is rotatably connected to the fixed plate through a connecting bearing; the movable plate can adjust the air passage by rotating to adjust the overlapping area of ​​its own opening structure and the opening structure of the fixed plate.

[0015] Compared with the prior art, this utility model provides a high-precision gas analyzer with the following features:

[0016] Beneficial effects:

[0017] 1. This utility model, through the arrangement of fan blades, allows the fan blades to rotate under the drive of a motor, causing the flue gas to move upward. The surface of the fixed plate is provided with annular openings distributed around the center of the fixed plate. The bottom end of the drive shaft is fixedly connected to the movable plate through an insertion method, and the top end of the drive shaft is fixedly connected to the rotating shaft of the stepper motor. The limit bearing facilitates the rotation of the drive shaft, which can drive the movable plate to rotate. The ventilation volume is adjusted by adjusting the overlapping area of ​​the openings in the movable plate and the fixed plate. When the overlapping area of ​​the openings in the movable plate and the fixed plate decreases, the lower fan blades continuously deliver flue gas upward, and the flue gas cannot be discharged quickly. This causes the internal air pressure in the lower part of the flue pipe cavity to rise rapidly, thereby maintaining the air pressure at a suitable level.

[0018] 2. This utility model, through the setting of a PLC controller, has a barometer located above the fan blades, which can monitor the air pressure below the fixed plate inside the flue in real time and transmit the monitoring data to the PLC controller. The PLC controller sets an air pressure threshold range, compares the actual data with the set threshold, and adjusts the speed of the drive motor and the rotation angle of the movable plate according to the comparison data, thereby adjusting the internal flue gas pressure to maintain it at a suitable level so that the infrared gas analyzer can analyze the flue gas. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of this utility model;

[0023] The components are as follows: 1. Smoke pipe; 11. Fixing plate; 12. Top cover; 13. Support ring; 14. PLC controller; 15. Infrared gas analyzer; 16. Barometer; 17. Fixing frame; 18. Drive motor; 19. Fan blade; 110. Limit bearing; 111. Drive shaft; 112. Connecting frame; 113. Stepper motor; 114. Movable plate; 115. Connecting bearing. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0025] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figure 1 - Figure 4 In this embodiment, a high-precision gas analyzer includes: a flue 1, a fixed plate 11 fixedly installed inside the flue 1, a top cover 12 fixedly installed on the top of the flue 1, a support ring 13 fixedly installed on the outside of the flue 1, a PLC controller 14 fixedly installed above the support ring 13, an infrared gas analyzer 15 inserted through the left side of the flue 1, a barometer 16 inserted through the left side of the flue 1, a fixed frame 17 fixedly installed inside the flue 1, a drive motor 18 fixedly installed inside the fixed frame 17, a fan blade 19 fixedly installed on the outside of the shaft of the drive motor 18, a limit bearing 110 fitted into the center of the top cover 12, a drive shaft 111 inserted through the limit bearing 110, a connecting frame 112 fixedly installed above the top cover 12, a stepper motor 113 fixedly installed inside the connecting frame 112, a movable plate 114 fixedly installed at the bottom end of the drive shaft 111, and a connecting bearing 115 fixedly installed below the movable plate 114.

[0028] The top of the flue pipe 1 has a 90-degree structure. The surface of the fixing plate 11 has a ring of openings distributed around the center of the fixing plate 11. The bottom surface of the infrared gas analyzer 15 is fixedly connected to the support ring 13. The barometer 16 passes through the flue pipe 1, and its end is located at the center of the vertical part of the flue pipe 1. The fixing bracket 17 is symmetrically installed on the upper and lower sides of the drive motor 18 with the center of the drive motor 18 as the reference. The drive motor 18 is fixedly connected to the flue pipe 1 through the fixing bracket 17. The fan blade 19 is located at the vertical section of the flue pipe 1. At the center of the structure, the drive shaft 111 is rotatably connected to the top cover 12 via the limit bearing 110. The top end of the drive shaft 111 is fixedly connected to the rotating shaft of the stepper motor 113. The stepper motor 113 is fixedly connected to the top cover 12 via the connecting bracket 112. The bottom end of the drive shaft 111 is fixedly connected to the movable plate 114 via an insertion method. The center of the bottom end of the movable plate 114 is provided with a vertically downward protruding structure. The movable plate 114 is rotatably connected to the fixed plate 11 via the connecting bearing 115.

[0029] Specifically, the flue pipe 1 restricts the direction of flue gas flow. The PLC controller 14 is a PR10 model, the infrared gas analyzer 15 is an FY-YQ203 model, and the barometer 16 is a VA550 model. A support ring 13 at the bottom of the PLC controller 14 and the infrared gas analyzer 15 provides support and restricts their positions. The barometer 16 is located above the fan blade 19 and can monitor the air pressure below the fixing plate 11 inside the flue pipe 1 in real time, transmitting the monitoring data to the PLC controller 14. The PLC controller 14 sets a pressure threshold range and compares the actual data with the set threshold, and then... The speed of the drive motor 18 and the rotation angle of the movable plate 114 are adjusted by comparing data, thereby adjusting the internal flue gas pressure to maintain a suitable pressure so that the infrared gas analyzer 15 can analyze the flue gas. The fan blade 19 can rotate under the drive motor 18, causing the flue gas to move upward. The limit bearing 110 facilitates the rotation of the drive shaft 111, which in turn drives the movable plate 114 to rotate. The ventilation volume is adjusted by adjusting the overlapping area of ​​the opening structure of the movable plate 114 and the opening structure of the fixed plate 11, thereby adjusting the air pressure inside the cavity below the fixed plate 11. The stepper motor 113 can drive the drive shaft 111 to rotate. The connecting frame 112 can limit the position of the stepper motor 113, and the connecting bearing 115 facilitates the rotation of the movable plate 114.

[0030] In use, the fan blade 19 rotates under the drive of the drive motor 18, causing the flue gas to move upward. The surface of the fixed plate 11 is provided with annular openings distributed around the center of the fixed plate 11. The bottom end of the drive shaft 111 is fixedly connected to the movable plate 114 by an insertion method, and the top end of the drive shaft 111 is fixedly connected to the rotating shaft of the stepper motor 113. The limit bearing 110 facilitates the rotation of the drive shaft 111, which drives the movable plate 114 to rotate. The airflow is adjusted by adjusting the overlapping area between the openings of the movable plate 114 and the fixed plate 11. When the overlapping area between the openings of the movable plate 114 and the fixed plate 11 decreases, the lower fan blade 19... As flue gas is continuously pumped upwards, and the flue gas cannot be discharged quickly, the internal air pressure in the part of the flue pipe 1 below the fixed plate 11 will rise rapidly, thereby maintaining the air pressure at a suitable level. The barometer 16 is located above the fan blade 19 and can monitor the air pressure below the fixed plate 11 inside the flue pipe 1 in real time. The monitoring data is transmitted to the PLC controller 14. The PLC controller 14 sets the air pressure threshold range, compares the actual data with the set threshold, and adjusts the speed of the drive motor 18 and the rotation angle of the movable plate 114 according to the comparison data, thereby adjusting the internal flue gas pressure to maintain the air pressure at a suitable level so that the infrared gas analyzer 15 can analyze the flue gas.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision gas analyzer, characterized in that, include: A flue (1) is provided, with a fixing plate (11) fixedly installed inside the flue (1), a top cover (12) fixedly installed on the top of the flue (1), a support ring (13) fixedly installed on the outside of the flue (1), a PLC controller (14) fixedly installed above the support ring (13), an infrared gas analyzer (15) inserted through the left side of the flue (1), a barometer (16) inserted through the left side of the flue (1), a fixing frame (17) fixedly installed inside the flue (1), and a drive motor fixedly installed inside the fixing frame (17). The machine (18) has a fan blade (19) fixedly installed on the outside of the shaft of the drive motor (18). A limit bearing (110) is fitted into the center of the top cover (12). A transmission shaft (111) is inserted inside the limit bearing (110). A connecting frame (112) is fixedly installed on the top of the top cover (12). A stepper motor (113) is fixedly installed inside the connecting frame (112). A movable plate (114) is fixedly installed at the bottom of the transmission shaft (111). A connecting bearing (115) is fixedly installed below the movable plate (114).

2. The high-precision gas analyzer according to claim 1, characterized in that: The top of the flue (1) is a 90-degree structure, and the surface of the fixing plate (11) is provided with an opening structure distributed in a ring with the center of the fixing plate (11) as the reference.

3. The high-precision gas analyzer according to claim 1, characterized in that: The bottom surface of the infrared gas analyzer (15) is fixedly connected to the support ring (13), and the barometer (16) passes through the smoke pipe (1) with its end located at the center of the vertical part of the smoke pipe (1).

4. A high-precision gas analyzer according to claim 1, characterized in that: The fixing frame (17) is symmetrically installed on the upper and lower sides of the drive motor (18) with the center of the drive motor (18) as the reference. The drive motor (18) is fixedly connected to the smoke pipe (1) through the fixing frame (17).

5. A high-precision gas analyzer according to claim 1, characterized in that: The fan blade (19) is located at the center of the vertical structure of the smoke pipe (1). The drive shaft (111) is rotatably connected to the top cover (12) through the limit bearing (110). The top end of the drive shaft (111) is fixedly connected to the rotating shaft of the stepper motor (113).

6. A high-precision gas analyzer according to claim 1, characterized in that: The stepper motor (113) is fixedly connected to the top cover (12) via a connecting frame (112), and the bottom end of the transmission shaft (111) is fixedly connected to the movable plate (114) by means of insertion.

7. A high-precision gas analyzer according to claim 1, characterized in that: The movable plate (114) has a vertically downward protruding structure at the center of its bottom end, and the movable plate (114) is rotatably connected to the fixed plate (11) through a connecting bearing (115).

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