Mixed gas measuring device in TAC film production process

Abstract

The utility model relates to the technical field of TAC (triallyl cyanurate) film production, in particular to a mixed gas measuring device in a TAC film production process, which comprises a polymerization reaction kettle, a gas storage tank and a base, a first conducting pipe is mounted at a gas inlet of the polymerization reaction kettle, a second conducting pipe is mounted at a gas outlet of the gas storage tank, and a gas analyzer is placed at the upper end of the base. An L-shaped pipe is mounted at a gas inlet in the front end of the gas analyzer, and a first connecting cylinder is fixedly connected to the outer wall of the L-shaped pipe; when the component concentration of the mixed gas is measured, the gas analyzer is started and is in a working state, and the first conduction pipe and the interior of the gas analyzer are in a conduction state, so that the mixed gas enters the interior of the gas analyzer, and the component concentration of the mixed gas is measured; therefore, the gas analyzer can be conveniently installed between the gas storage tank and the polymerization reaction kettle, measurement can be carried out without sampling when needed, and the purpose of improving the use convenience is achieved.

Description

A device for measuring mixed gas during TAC membrane production Technical Field

[0001] This utility model relates to the field of TAC membrane production technology, specifically to a mixed gas measuring device in the TAC membrane production process. Background Technology

[0002] TAC film, or cellulose triacetate film, is a stable physicochemical material with excellent optical properties. It is an indispensable optical film in polarizer manufacturing, primarily used in LCD production. In LCDs, polarizers convert natural light into polarized light, making them an essential component. The core raw materials are PVA film and TAC film, which together account for approximately 65% ​​of the cost. The TAC film, placed on both sides of the PVA film, provides support and protection, highlighting its crucial role. Furthermore, the mixed gas is measured during the TAC film production process, necessitating a device for measuring the mixed gas during TAC film production.

[0003] In the TAC membrane production process, the step of introducing a mixed gas (usually including reactive and inert gases) typically occurs during the polymerization reaction stage. In use, the mixed gas inside the gas storage tank is introduced into the polymerization reactor. The introduction of the mixed gas is crucial for controlling reaction conditions, promoting the polymerization reaction, and ensuring product quality.

[0004] However, since no gas mixing measurement device is installed between the gas storage tank and the polymerization reactor, the concentration of components in the mixed gas cannot be automatically measured and displayed. It is necessary to first sample the mixed gas inside the gas storage tank through a sampling container, then move the sampling container to the gas analyzer, and then pass the sampled gas into the gas analyzer. The gas analyzer can then automatically measure the concentration of components in the mixed gas. Through accurate measurement, it can be ensured that the gas in the polymerization reactor meets the process requirements. However, this method is extremely inconvenient to use. Therefore, it is necessary to propose a gas mixing measurement device in the TAC membrane production process to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a mixed gas measuring device in the TAC membrane production process, which features a gas analyzer installed between the gas storage tank and the polymerization reactor, allowing for measurement without sampling when needed, thereby improving ease of use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a mixed gas measuring device for TAC membrane production, comprising a polymerization reactor, a gas storage tank, and a base. A first conductive pipe is installed at the gas inlet of the polymerization reactor, and a second conductive pipe is installed at the gas outlet of the gas storage tank. A gas analyzer is placed on the upper end of the base. An L-shaped pipe is installed at the gas inlet of the gas analyzer. A first connecting cylinder is fixedly connected to the outer wall of the L-shaped pipe. A movable ring is rotatably connected to the outer wall of the first connecting cylinder via an annular guide rail. An internally threaded cylinder is fixedly connected to the outer wall of the movable ring. An O-ring is fixedly connected to the upper end of the first connecting cylinder via a groove. A telescopic pipe is connected to the lower side of the outer wall of the first conductive pipe. A second connecting cylinder, which is pressed against the O-ring, is fixedly connected to the outer wall of the telescopic pipe. An externally threaded ring, which is threadedly connected to the inner wall of the internally threaded cylinder, is fixedly connected to the outer wall of the second connecting cylinder.

[0007] The outer side of the second connecting cylinder is provided with a limiting mechanism.

[0008] To prevent the first connecting disc and the second connecting cylinder from rotating, as a preferred embodiment of the mixed gas measuring device in the TAC membrane production process of this utility model, the limiting mechanism includes a first connecting disc fixedly connected to the outer wall of the second connecting cylinder, and two guide cylinders fixedly connected to the lower end of the outer wall of the first guide tube. The interior of each of the two guide cylinders is slidably connected to a slide rod fixedly connected to the upper end of the first connecting disc.

[0009] In order to draw mixed gas into the polymerization reactor with the assistance of an air pump when the pressure inside the gas storage tank is insufficient, as a preferred mixed gas measuring device in the TAC membrane production process of this utility model, the upper end of the base is fixedly connected to a support platform, and the upper side of the support platform is fixedly connected to an air pump through a support. The air inlet end of the air pump is connected to the second guide pipe, and the air outlet end of the air pump is connected to the first guide pipe.

[0010] To facilitate the reinforcement of the first connecting cylinder during installation, as a preferred embodiment of the mixed gas measuring device in the TAC membrane production process of this utility model, a second connecting plate is fixedly connected to the outer wall of the first connecting cylinder, and two fixed columns located in front of the gas analyzer are fixedly connected between the second connecting plate and the base.

[0011] In order to achieve precise regulation of the mixed gas flow rate and thus meet the requirements of the production process for the mixed gas flow rate, as a preferred embodiment of the mixed gas measuring device in the TAC membrane production process of this utility model, the second guide tube is provided with a throttling valve.

[0012] To facilitate anti-slip effects when rotating the internally threaded cylinder, the outer wall of the internally threaded cylinder is preferably provided with anti-slip texture as a preferred embodiment of the mixed gas measuring device in the TAC membrane production process of this utility model.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] Place the gas analyzer on the upper part of the base, ensuring the external threaded ring and internal threaded cylinder are aligned. Rotate the internal threaded cylinder to move the second connecting cylinder downwards until it is tightly pressed against the O-ring, thus sealing the connection between the second and first connecting cylinders. During operation, the mixed gas inside the gas storage tank enters the polymerization reactor. To measure the concentration of the mixed gas, start the gas analyzer and put it into operation. Since the first conductive tube is connected to the inside of the gas analyzer, the mixed gas enters the analyzer, allowing for measurement of its concentration. This facilitates the installation of the gas analyzer between the gas storage tank and the polymerization reactor, enabling measurement without sampling when needed, thus improving ease of use. Attached Figure Description

[0015] Figure 1 is an overall front sectional view of this utility model;

[0016] Figure 2 is an enlarged view of point A in Figure 1 of this utility model;

[0017] Figure 3 is a connection structure diagram of the first connecting cylinder of this utility model.

[0018] In the diagram: 1. Polymerization reactor; 2. Gas storage tank; 3. Second connecting pipe; 4. First connecting pipe; 5. Gas pump; 6. Base; 7. Gas analyzer; 8. L-shaped tube; 9. First connecting cylinder; 10. Movable ring; 11. Internally threaded cylinder; 12. O-ring seal; 13. Telescopic tube; 14. Second connecting cylinder; 15. Externally threaded ring; 16. First connecting plate; 17. Guide cylinder; 18. Slide rod; 19. Second connecting plate; 20. Fixed column; 21. Support platform. Detailed Implementation

[0019] Please refer to Figures 1 to 3. A mixed gas measuring device in the TAC membrane production process includes a polymerization reactor 1, a gas storage tank 2, and a base 6. A first conductive pipe 4 is installed at the gas inlet of the polymerization reactor 1, and a second conductive pipe 3 is installed at the gas outlet of the gas storage tank 2. A gas analyzer 7 is placed on the upper end of the base 6. An L-shaped pipe 8 is installed at the gas inlet of the front end of the gas analyzer 7. A first connecting cylinder 9 is fixedly connected to the outer wall of the L-shaped pipe 8. A movable ring 10 is rotatably connected to the outer wall of the first connecting cylinder 9 through an annular guide rail. An internally threaded cylinder 11 is fixedly connected to the outer wall of the movable ring 10. An O-ring 12 is fixedly connected to the upper end of the first connecting cylinder 9 through a groove. A telescopic pipe 13 is connected to the lower side of the outer wall of the first conductive pipe 4. A second connecting cylinder 14 that is pressed against the O-ring 12 is fixedly connected to the outer wall of the telescopic pipe 13. An externally threaded ring 15 that is threadedly connected to the inner wall of the internally threaded cylinder 11 is fixedly connected to the outer wall of the second connecting cylinder 14.

[0020] The outer side of the second connecting cylinder 14 is equipped with a limiting mechanism.

[0021] In this embodiment: When in use, the gas analyzer 7 is first placed at a suitable position on the upper end of the base 6, and the external threaded ring 15 and the internal threaded cylinder 11 are kept in a mating state. Then, the internal threaded cylinder 11 is rotated. Since the limiting mechanism can prevent the second connecting cylinder 14 from rotating, and the telescopic tube 13 has the characteristic of being able to extend and retract in the vertical direction, the second connecting cylinder 14 can be moved downward until the second connecting cylinder 14 is pressed tightly against the O-ring 12, thereby sealing the second connecting cylinder 14 and the first connecting cylinder 9 to prevent gas leakage. The second connecting cylinder 14 is locked by the threaded connection, completing the connection between the gas analyzer 7 inlet and the first guide tube 4.

[0022] During operation, the mixed gas inside the gas storage tank 2 enters the interior of the polymerization reactor 1 through the second connecting pipe 3 and the first connecting pipe 4. The introduction of the mixed gas is crucial for controlling reaction conditions, promoting polymerization, and ensuring product quality. When it is necessary to measure the concentration of the mixed gas, the gas analyzer 7 is activated and put into operation. Since the first connecting pipe 4, the telescopic pipe 13, the second connecting cylinder 14, the first connecting cylinder 9, the L-shaped pipe 8, and the interior of the gas analyzer 7 are in a connected state, the mixed gas will enter the interior of the gas analyzer 7, and the concentration of the mixed gas will be measured. In this way, it is convenient to install the gas analyzer 7 between the gas storage tank 2 and the polymerization reactor 1, and to perform measurements without sampling when needed, thereby improving ease of use.

[0023] It should be noted that the gas analyzer 7 mentioned in this article refers to the TY-6300 series online infrared gas analyzer 7 (including chassis design, sensors, measurement system, data processing and display, power supply and interface, and other characteristics, which together ensure the instrument's high accuracy, high stability and ease of use). It can be used for the detection of a variety of gases and has high accuracy and stability.

[0024] As a technical optimization of this utility model, the limiting mechanism includes a first connecting plate 16 fixedly connected to the outer wall of the second connecting cylinder 14, and two guide cylinders 17 fixedly connected to the lower end of the outer wall of the first guiding pipe 4. The interior of each of the two guide cylinders 17 is slidably connected to a slide rod 18 fixedly connected to the upper end of the first connecting plate 16.

[0025] In this embodiment, by setting two guide cylinders 17 and two slide rods 18, the rotation of the first connecting plate 16 and the second connecting cylinder 14 is prevented.

[0026] As a technical optimization of this utility model, a support platform 21 is fixedly connected to the upper end of the base 6, and an air pump 5 is fixedly connected to the upper side of the support platform 21 through a support. The air inlet of the air pump 5 is connected to the second guide pipe 3, and the air outlet of the air pump 5 is connected to the first guide pipe 4.

[0027] In this embodiment: by setting up an air pump 5, when the pressure inside the gas storage tank 2 is insufficient, the mixed gas can be drawn into the interior of the polymerization reactor 1 with the assistance of the air pump 5.

[0028] As a technical optimization of this utility model, a second connecting plate 19 is fixedly connected to the outer wall of the first connecting cylinder 9, and two fixed columns 20 located in front of the gas analyzer 7 are fixedly connected between the second connecting plate 19 and the base 6.

[0029] In this embodiment, the installation of the first connecting cylinder 9 is reinforced by setting a second connecting plate 19 and two fixing posts 20.

[0030] As a technical optimization of this utility model, a throttling valve is provided inside the second conductive tube 3.

[0031] In this embodiment, by adjusting the opening of the throttle valve, the flow rate of the mixed gas can be precisely adjusted, thereby meeting the requirements of the production process for the flow rate of the mixed gas.

[0032] As a technical optimization of this utility model, the outer wall of the internally threaded cylinder 11 is provided with anti-slip texture.

[0033] In this embodiment: anti-slip texture is provided to prevent slippage when rotating the internal threaded cylinder 11.

[0034] Working principle: When in use, first place the gas analyzer 7 at a suitable position on the upper end of the base 6, and keep the external threaded ring 15 and the internal threaded cylinder 11 in a mating state. Then rotate the internal threaded cylinder 11. Due to the two guide cylinders 17 and the two slide rods 18, the first connecting plate 16 and the second connecting cylinder 14 are prevented from rotating. The telescopic tube 13 has the characteristic of being telescopic in the vertical direction, which allows the second connecting cylinder 14 to move downward until the second connecting cylinder 14 is tightly pressed against the O-ring seal 12. This seals the second connecting cylinder 14 and the first connecting cylinder 9, preventing gas leakage. The second connecting cylinder 14 is locked by the threaded connection, completing the connection between the gas analyzer 7 inlet and the first guide tube 4.

[0035] During operation, the mixed gas inside the gas storage tank 2 enters the polymerization reactor 1 through the second guide pipe 3 and the first guide pipe 4. When the pressure inside the gas storage tank 2 is insufficient, the mixed gas can be drawn into the polymerization reactor 1 with the assistance of the air pump 5. By adjusting the opening of the throttle valve, the flow rate of the mixed gas can be precisely adjusted to meet the requirements of the production process. The introduction of the mixed gas is crucial for controlling reaction conditions, promoting polymerization, and ensuring product quality. When it is necessary to measure the concentration of the mixed gas components, the gas analyzer 7 is started and put into working condition. Since the first guide pipe 4, the telescopic pipe 13, the second connecting cylinder 14, the first connecting cylinder 9, the L-shaped pipe 8, and the interior of the gas analyzer 7 are in a connected state, the mixed gas will enter the interior of the gas analyzer 7, and the concentration of the mixed gas components will be measured. In this way, it is convenient to install the gas analyzer 7 between the gas storage tank 2 and the polymerization reactor 1, and measurements can be taken without sampling when needed, thereby improving ease of use.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mixed gas measuring device for TAC membrane production process, comprising a polymerization reactor (1), a gas storage tank (2), and a base (6), characterized in that: The gas inlet of the polymerization reactor (1) is equipped with a first conductive pipe (4), the outlet of the gas storage tank (2) is equipped with a second conductive pipe (3), a gas analyzer (7) is placed on the upper end of the base (6), an L-shaped pipe (8) is installed at the gas inlet of the front end of the gas analyzer (7), a first connecting cylinder (9) is fixedly connected to the outer wall of the L-shaped pipe (8), a movable ring (10) is rotatably connected to the outer wall of the first connecting cylinder (9) through an annular guide rail, and an internal thread is fixedly connected to the outer wall of the movable ring (10). The upper end of the first connecting cylinder (9) is fixedly connected to an O-ring seal (12) through a groove. The lower side of the outer wall of the first guide tube (4) is connected to a telescopic tube (13). The outer wall of the telescopic tube (13) is fixedly connected to a second connecting cylinder (14) that is pressed against the O-ring seal (12). The outer wall of the second connecting cylinder (14) is fixedly connected to an external threaded ring (15) that is threaded to the inner wall of the internal threaded cylinder (11). The outer side of the second connecting cylinder (14) is provided with a limiting mechanism.

2. The mixed gas measuring device in the TAC membrane production process according to claim 1, characterized in that: The limiting mechanism includes a first connecting plate (16) fixedly connected to the outer wall of the second connecting cylinder (14), and two guide cylinders (17) fixedly connected to the lower end of the outer wall of the first guide tube (4). The interior of each of the two guide cylinders (17) is slidably connected to a slide rod (18) fixedly connected to the upper end of the first connecting plate (16).

3. The mixed gas measuring device in the TAC membrane production process according to claim 1, characterized in that: The upper end of the base (6) is fixedly connected to a support platform (21), and the upper side of the support platform (21) is fixedly connected to an air pump (5) via a support. The air inlet of the air pump (5) is connected to the second guide pipe (3), and the air outlet of the air pump (5) is connected to the first guide pipe (4).

4. The mixed gas measuring device in the TAC membrane production process according to claim 1, characterized in that: The outer wall of the first connecting cylinder (9) is fixedly connected to the second connecting plate (19), and the second connecting plate (19) is fixedly connected to the base (6) by two fixed columns (20) located in front of the gas analyzer (7).

5. The mixed gas measuring device in the TAC membrane production process according to claim 1, characterized in that: The second guide tube (3) is equipped with a throttle valve.

6. The mixed gas measuring device in the TAC membrane production process according to claim 1, characterized in that: The outer wall of the internally threaded cylinder (11) is provided with anti-slip texture.

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