Nitrogen concentration detection device

Abstract

The utility model discloses a nitrogen concentration detection device which comprises a transmission connecting pipe and a concentration detection assembly, the tops of the two ends of the transmission connecting pipe are fixedly connected with detection through-flow pipes, the concentration detection assembly comprises a detection connecting pipe and a display controller, the two ends of the detection connecting pipe are fixedly provided with flow guide connecting cylinders, and the flow guide connecting cylinders are fixedly connected with the display controller. And flow guide rotating shafts are arranged in the flow guide connecting cylinders, spiral flow guide fans are fixedly mounted at the bottoms of the flow guide rotating shafts, and a driving connecting shaft is arranged between the two flow guide rotating shafts. The nitrogen concentration of a prepared product is subjected to multi-point detection through the detection connecting pipe and the plurality of nitrogen concentration detection sensors, and is displayed through the display controller, so that the nitrogen concentration in the nitrogen preparation process can be conveniently controlled, and the nitrogen concentration of the prepared product can be conveniently monitored for a long time; and the working condition of the rectifying tower behind the nitrogen preparation reaction kettle is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of gas concentration detection devices, in particular to a nitrogen concentration detection device. Background Art

[0002] In the existing technology, nitrogen is divided into pure nitrogen (≥99.99%), high-purity nitrogen (≥99.999%) and ultra-pure nitrogen (≥99.9999%) according to its purity. Different fields have different requirements for the purity of nitrogen. With the development of my country's semiconductor and integrated circuit fields, the purity requirements for nitrogen are getting higher and higher, and the demand for ultra-pure nitrogen is also increasing.

[0003] After searching, the Chinese patent application number 202220709118.1 discloses a device for simultaneously producing ultra-pure nitrogen and high-purity nitrogen, including a main heat exchanger, a subcooler, a primary distillation tower, a secondary distillation tower, a tertiary distillation tower and a turbine expander; the equipment is connected through pipelines, and the connection relationship is: the raw air outlet of the main heat exchanger is connected to the bottom of the primary distillation tower through a pipeline; the expanded air outlet of the main heat exchanger is connected to the turbine expander and the secondary distillation tower in sequence through pipelines; a liquid air outlet is arranged at the bottom of the primary distillation tower, and liquid nitrogen outlets are arranged in the middle and the top respectively, and the liquid air outlet at the bottom of the primary distillation tower, the liquid nitrogen outlet in the middle and the liquid nitrogen outlet at the top are respectively connected to the middle, upper middle and top of the secondary distillation tower through pipelines after passing through the cooler.

[0004] The above patent has the following deficiencies: the outputs of high-purity nitrogen and ultra-pure nitrogen produced by the device can be interchanged within a certain range while ensuring their respective purities, and the outputs of high-purity nitrogen and ultra-pure nitrogen can be adjusted according to market demand; however, in actual use, before the nitrogen produced by the device enters the supercooler, there is a lack of a nitrogen concentration detection device, and the concentration of the produced nitrogen cannot be directly obtained, which makes it inconvenient to control the distillation state time and distillation of the nitrogen produced in the distillation tower. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a nitrogen concentration detection device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A nitrogen concentration detection device comprises: a transmission connecting pipe and a concentration detection component, wherein the tops of both ends of the transmission connecting pipe are fixedly connected with detection flow pipes, the concentration detection component comprises a detection connecting pipe and a display controller, both ends of the detection connecting pipe are fixedly installed with flow guide connecting cylinders, a flow guide rotating shaft is arranged inside the flow guide connecting cylinder, a spiral flow guide fan is fixedly installed at the bottom of the flow guide rotating shaft, and a driving connecting shaft is arranged between the two flow guide rotating shafts, the driving connecting shaft is drivingly connected with a servo motor, a supporting connecting plate is arranged at the bottom end of the servo motor, both ends of the supporting connecting plate are fixedly connected with connecting brackets, the display controller is fixedly installed inside the connecting bracket, a plurality of mounting branch pipes are equidistantly fixedly connected to both sides of the detection connecting pipe, and nitrogen concentration detection sensors are fixedly installed inside the plurality of mounting branch pipes.

[0008] As a further solution of the utility model: a control solenoid valve is fixedly installed in the middle of the transmission connecting pipe, and a connecting solenoid valve is fixedly installed in the middle of the detection flow pipe.

[0009] As a further solution of the utility model: the two flow-guiding connecting tubes are respectively fixedly installed on the top ends of the two detection flow-through pipes, and a cross bracket is fixedly installed inside the flow-guiding connecting tubes.

[0010] As a further solution of the utility model: the middle part of the guide shaft is rotatably connected to the cross bracket, and a bevel gear 1 is fixedly installed on the top of the guide shaft.

[0011] As a further solution of the utility model: one side of the bevel gear one is meshingly connected with a bevel gear two, and the bevel gear two is fixedly installed on the end of the driving connecting shaft.

[0012] As a further solution of the utility model: a bevel gear three is fixedly installed in the middle of the driving connecting shaft, a bevel gear four is meshingly connected to one side of the bevel gear three, and the bevel gear four is fixedly installed on the top of the output shaft of the servo motor.

[0013] As a further solution of the utility model: both ends of the connecting bracket are respectively fixed to a flow guide connecting cylinder, and a motor mounting cylinder is fixedly installed on the top end of the supporting connecting plate.

[0014] As a further solution of the utility model: a main heat exchanger is fixedly installed at one end of the transmission connecting pipe, and a subcooler is fixedly installed at the other end.

[0015] Compared with the prior art, the utility model provides a nitrogen concentration detection device, which has the following beneficial effects:

[0016] 1. The nitrogen concentration detection device performs multi-point detection of the nitrogen concentration of the produced product through the detection connecting pipe and multiple nitrogen concentration detection sensors, and displays it through the display controller, which is convenient for controlling the nitrogen concentration in the nitrogen production process, and is also convenient for long-term monitoring of the nitrogen concentration of the produced product, and controlling the working condition of the distillation tower after the nitrogen production reactor.

[0017] 2. The nitrogen concentration detection device drives two flow guide shafts synchronously by driving the connecting shaft, so that the speed of the prepared product introduced into the detection connecting pipe and the speed of the product discharged from the detection connecting pipe are the same, which is convenient for detecting the nitrogen concentration of the prepared product.

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall assembly of the utility model;

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the overall assembly of the utility model;

[0021] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0022] In the figure: 1. transmission connecting pipe; 2. main heat exchanger; 3. subcooler; 4. control solenoid valve; 5. detection flow pipe; 6. connection solenoid valve; 7. flow guide connecting tube; 8. detection connecting pipe; 9. installation branch pipe; 10. nitrogen concentration detection sensor; 11. cross bracket; 12. flow guide shaft; 13. spiral guide fan; 14. bevel gear one; 15. bevel gear two; 16. drive connecting shaft; 17. bevel gear three; 18. bevel gear four; 19. servo motor; 20. motor installation tube; 21. support connecting plate; 22. protective arc cover; 23. connection bracket; 24. display controller. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] A nitrogen concentration detection device, such as Figures 1 to 3As shown, it includes: a transmission connecting pipe 1 and a concentration detection component, one end of the transmission connecting pipe 1 is fixedly installed with a main heat exchanger 2 through a flange, and the other end is fixedly installed with a subcooler 3 through a flange; the nitrogen produced by the nitrogen production reactor first enters the main heat exchanger 2 for cooling, and then enters the subcooler 3 through the transmission connecting pipe 1 for separation and treatment of the cooled nitrogen and its by-products.

[0025] A detection flow tube 5 is welded to the top of both ends of the transmission connecting pipe 1, and a control solenoid valve 4 is fixedly installed in the middle of the transmission connecting pipe 1, and the control solenoid valve 4 is used to control the opening and closing of the transmission connecting pipe 1; a connecting solenoid valve 6 is fixedly installed in the middle of the detection flow tube 5, and the connecting solenoid valve 6 is used to control the opening and closing of the detection flow tube 5.

[0026] The concentration detection component includes a detection connecting tube 8 and a display controller 24. Both ends of the detection connecting tube 8 are fixedly installed with flow guide connecting tubes 7, and the connection is sealed. The two flow guide connecting tubes 7 are respectively fixedly installed on the top of the two detection flow tubes 5 through flanges to facilitate the produced nitrogen and its by-products to enter the detection connecting tube 8.

[0027] Multiple mounting branch pipes 9 are welded at equal distances on both sides of the detection connecting pipe 8, and nitrogen concentration detection sensors 10 are fixedly installed inside the multiple mounting branch pipes 9. The nitrogen concentration detection sensor 10 can select the intelligent nitrogen gas sensor module of Huayi Environmental Protection 7NE series.

[0028] The display controller 24 includes a display module, a main control module and a data processing module. The main control module is used to control the opening and closing of the connecting solenoid valve 6 and the control solenoid valve 4, and control the operation of the data processing module and the display module. The display module is used to display the data processed by the data processing module and the status of the connecting solenoid valve 6 and the control solenoid valve 4; multiple nitrogen concentration detection sensors 10 are connected to the main control module, and the main control module connects the nitrogen concentration detection sensors 10.

[0029] A cross bracket 11 is fixedly installed inside the guide connecting tube 7, and a guide shaft 12 is rotatably installed at the bottom end of the cross bracket 11. A spiral guide fan 13 is fixedly installed at the bottom of the guide shaft 12. The spiral guide fan 13 close to the main heat exchanger 2 introduces the produced products (nitrogen and its by-products) into the detection connecting tube 8, and the spiral guide fan 13 close to the subcooler 3 guides the produced products out of the detection connecting tube 8.

[0030] A connecting bracket 23 is fixedly installed between the two flow-guiding connecting tubes 7, a display controller 24 is fixedly installed inside the connecting bracket 23, and a supporting connecting plate 21 is fixedly installed on the top of the connecting bracket 23, a motor mounting tube 20 is fixedly installed on the top of the supporting connecting plate 21, and a servo motor 19 is fixedly installed inside the motor mounting tube 20.

[0031] A bevel gear 4 18 is fixedly installed on the top of the output shaft of the servo motor 19, and a bevel gear 3 17 is meshedly connected to one side of the bevel gear 4 18. A driving connecting shaft 16 is fixedly installed inside the bevel gear 3 17, and both ends of the driving connecting shaft 16 are rotatably connected to the two guide connecting tubes 7.

[0032] A protective arc cover 22 is fixedly mounted on the upper surface of the supporting connecting plate 21, and the protective arc cover 22 covers the servo motor 19 and the bevel gear three 17 and the bevel gear four 18 to protect them.

[0033] The end of the driving connecting shaft 16 passes through the guide connecting tube 7 and extends to the inside of the guide connecting tube 7, and the connection is sealed; the extended end of the driving connecting shaft 16 is fixedly installed with a bevel gear 2 15, and one side of the bevel gear 2 15 is meshedly connected with a bevel gear 14, and the bevel gear 14 is fixedly installed on the top of the guide shaft 12.

[0034] Working principle:

[0035] Please refer to Figures 1 to 3 , assemble the device as shown in the figure;

[0036] During use of the device, the display controller 24 first starts the control solenoid valve 4 to seal the transmission connecting pipe 1, and then starts the connection solenoid valve 6 to allow the prepared product to enter the detection flow pipe 5; and synchronously starts the servo motor 19, the servo motor 19 drives the connecting shaft 16 through the bevel gear three 17 and the bevel gear four 18, and the driving connecting shaft 16 synchronously drives the two guide shafts 12 through the bevel gear one 14 and the bevel gear two 15, the guide shaft 12 allows the prepared product to flow inside the detection connecting pipe 8 through the spiral guide fan 13, and the nitrogen concentration of the prepared product is detected by multiple nitrogen concentration detection sensors 10, and the detection data is transmitted to the display controller 24, and the display controller 24 displays the detection data in real time; after the detection is completed, the detection flow pipe 5 is sealed by the connection solenoid valve 6, and the control solenoid valve 4 is opened to allow the prepared product to circulate through the transmission connecting pipe 1 again.

[0037] During the nitrogen production process, the nitrogen concentration is tested at regular intervals without stopping the machine to ensure long-term monitoring of the nitrogen concentration of the product, so as to control the working condition of the distillation tower after the nitrogen production reactor.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A nitrogen concentration detection device, characterized in that: include: A transmission connecting pipe (1) and a concentration detection component, wherein the tops of both ends of the transmission connecting pipe (1) are fixedly connected to detection flow pipes (5), the concentration detection component comprises a detection connecting pipe (8) and a display controller (24), both ends of the detection connecting pipe (8) are fixedly installed with flow guide connecting cylinders (7), the interior of the flow guide connecting cylinder (7) is provided with a flow guide rotating shaft (12), the bottom of the flow guide rotating shaft (12) is fixedly installed with a spiral flow guide fan (13), and a drive connecting cylinder (13) is provided between the two flow guide rotating shafts (12). A connecting shaft (16) is connected to the driving connecting shaft (16) in driving connection with a servo motor (19), a supporting connecting plate (21) is arranged at the bottom end of the servo motor (19), both ends of the supporting connecting plate (21) are fixedly connected with connecting brackets (23), the display controller (24) is fixedly installed inside the connecting bracket (23), and a plurality of mounting branch pipes (9) are fixedly connected to both sides of the detection connecting pipe (8) at equal distances, and a nitrogen concentration detection sensor (10) is fixedly installed inside the plurality of mounting branch pipes (9).

2. A nitrogen concentration detection device according to claim 1, characterized in that: A control solenoid valve (4) is fixedly installed in the middle of the transmission connection pipe (1), and a connection solenoid valve (6) is fixedly installed in the middle of the detection flow pipe (5).

3. A nitrogen concentration detection device according to claim 1, characterized in that: The two flow-guiding connecting tubes (7) are respectively fixedly mounted on the top ends of the two detection flow-through tubes (5), and a cross bracket (11) is fixedly mounted inside the flow-guiding connecting tubes (7).

4. A nitrogen concentration detection device according to claim 3, characterized in that: The middle portion of the flow guide shaft (12) is rotatably connected to the cross bracket (11), and a bevel gear 1 (14) is fixedly mounted on the top of the flow guide shaft (12).

5. A nitrogen concentration detection device according to claim 4, characterized in that: One side of the bevel gear 1 (14) is meshedly connected with a bevel gear 2 (15), and the bevel gear 2 (15) is fixedly mounted on the end of the driving connection shaft (16).

6. A nitrogen concentration detection device according to claim 1, characterized in that: A bevel gear three (17) is fixedly mounted in the middle of the driving connecting shaft (16), a bevel gear four (18) is meshedly connected to one side of the bevel gear three (17), and the bevel gear four (18) is fixedly mounted on the top of the output shaft of the servo motor (19).

7. A nitrogen concentration detection device according to claim 1, characterized in that: Both ends of the connection bracket (23) are respectively fixed to a flow guide connection cylinder (7), and a motor mounting cylinder (20) is fixedly mounted on the top end of the support connection plate (21).

8. A nitrogen concentration detection device according to claim 1, characterized in that: A main heat exchanger (2) is fixedly mounted on one end of the transmission connecting pipe (1), and a subcooler (3) is fixedly mounted on the other end.

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