Sampling method suitable for carbon fiber precursor stock solution

Abstract

The invention provides a carbon fiber precursor stock solution sampling method which comprises the following steps: S1, providing a sealed container which is internally provided with a sampler and can be opened and closed; and S2, the sealed container is placed on the displacement assembly located at the first position. According to the sampling method suitable for the carbon fiber precursor stock solution, automatic sampling is adopted, the labor intensity is greatly reduced, safety and reliability are achieved, a medium in the reaction kettle is sealed through the closed sealing cavity and the openable and closable channel between the sealing cavity and the reaction kettle, the sealing performance of the high-temperature corrosion medium is guaranteed, and the service life of the high-temperature corrosion medium is prolonged. Air is prevented from entering the reaction kettle and making contact with a high-temperature corrosion medium to generate toxic and harmful substances, inert gas is further adopted for replacing the air in the sealing cavity, the sealing performance of the high-temperature corrosion medium is guaranteed, meanwhile, the sealing container is fixed and tightened through the opening and closing assembly, the sealing container can be disassembled to take out the sampler, and the sampling efficiency is improved. And leakage of toxic media is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medium sampling, and in particular to a method for sampling carbon fiber precursor solution. Background Art

[0002] In the chemical industry, there are certain technical difficulties in sampling the carbon fiber precursor solution medium. The carbon fiber precursor solution contains acrylonitrile, which is a petroleum by-product. It usually comes from petroleum-based chemicals. Acrylonitrile is made through a series of chemical reactions of hydrocarbon compounds in petroleum and is highly toxic.

[0003] When sampling the high-temperature toxic and corrosive carbon fiber precursor solution, manual sampling is traditionally used. However, the manual sampling steps are cumbersome, and it is difficult to ensure that the sampling is carried out under sealed conditions, which poses a great safety hazard.

[0004] Therefore, in order to solve the above problems, the present invention proposes a method for sampling carbon fiber precursor solution, which ensures that the sampling action is automatically completed under sealed conditions and ensures the safety of the sampling operation. Summary of the invention

[0005] In order to solve the above-mentioned technical problems existing in the existing high-temperature toxic and corrosive media when sampling, the present invention provides a method suitable for sampling carbon fiber precursor solution.

[0006] According to one object of the present invention, the present invention provides a method for sampling carbon fiber precursor solution, comprising the steps of:

[0007] S1. Providing a sealed container with a sampler inside, wherein the sealed container is an openable and closable sealed container;

[0008] S2. The sealed container is placed in a displacement assembly at position one;

[0009] S3. The sealed container is transferred to the opening and closing assembly by the displacement assembly, and the opening and closing assembly locates and opens the sealed container;

[0010] S4. The sampler is transferred into the sealed cavity by the displacement assembly, and the sampler is connected to the winding assembly located in the sealed cavity, the displacement assembly and the sampler are separated and transferred out of the sealed cavity, wherein a channel is provided between the sealed cavity and the reaction kettle to be sampled, and the channel is sealed;

[0011] S5. The air in the sealed cavity is replaced with an inert gas. After the replacement is qualified, the channel between the sealed cavity and the reactor to be sampled is opened, and the winding assembly transfers the sampler to the reactor through the channel, and the sampler samples the medium in the reactor;

[0012] S6. After the sampler has completed sampling, the sampler is transferred into the sealed cavity by the winding assembly, and the sampler and the winding assembly are separated and transferred out of the sealed cavity by the displacement assembly;

[0013] S7. Place the sampler into the sealed container on the opening and closing component through the displacement component, and seal the sampler in the sealed container through the opening and closing component;

[0014] S8. The displacement component transfers the sealed container to position one.

[0015] Preferably, the sealed cavity is surrounded by an inner cavity sealing cover, the displacement assembly, the opening and closing assembly, the winding assembly and the sealed cavity are all arranged above the equipment operating platform, the reactor is arranged below the equipment operating platform, the outer covers of the displacement assembly, the opening and closing assembly, the sealed cavity and the winding assembly are provided with an airtight cover, a manhole cover is provided on the airtight cover, the manhole cover corresponds to position one of the displacement assembly, between steps S1 and S2, the manhole cover on the airtight cover is opened, and the sealed container is placed on the displacement assembly through the manhole cover, and between steps S2 and S3, the manhole cover on the airtight cover is closed.

[0016] Preferably, the sealed container comprises a container body and a sealing cover, the container body is provided with an inlet and outlet for the sampler to enter and exit, the sealing cover opens and closes the inlet and outlet and is connected to the sampler, and the displacement assembly corresponds to the sealing cover;

[0017] The displacement assembly includes an air gripper, a vertically arranged slide rail, and a horizontally arranged cylinder telescopic assembly, the slide rail is movably mounted with the cylinder telescopic assembly, the cylinder telescopic assembly is drivingly connected to the air gripper, and the air gripper is configured to grasp the sealing cover;

[0018] The step S3 comprises:

[0019] S31. The cylinder telescopic assembly moves on the slide rail;

[0020] S32. Move the air claw to position four through the cylinder telescopic assembly and start the opening and closing assembly.

[0021] Preferably, the container body is a cylindrical container body, the inlet and outlet are located at one end of the container body in the length direction, and matching threads are provided on the inner side of the inlet and outlet and the outer side of the sealing cover;

[0022] The opening and closing assembly comprises a rotatable first wheel body, a socket capable of accommodating the container body is reserved at the center of the first wheel body, and a tightening cylinder arranged radially along the first wheel body is installed on the first wheel body;

[0023] The step S3 further comprises:

[0024] S33. Tightening the sealed container by the tightening cylinder;

[0025] S34. The first wheel cooperates with the tightening cylinder to drive the container body to rotate, and the threads between the container body and the sealing cover are disengaged.

[0026] Preferably, the opening and closing assembly further comprises:

[0027] A rotatable second wheel body, the second wheel body is connected by a servo motor drive, the second wheel body is connected to the first wheel body by a belt drive, and the radial dimension of the second wheel body is smaller than the radial dimension of the first wheel body;

[0028] The outer wall of the container body is provided with a tightening groove corresponding to the tightening cylinder;

[0029] In step S33, the movable end of the tightening cylinder is inserted into the tightening groove;

[0030] In step S34, the second wheel body is driven to rotate by the servo motor, and the second wheel body drives the first wheel body to rotate through the belt.

[0031] Preferably, the inner cavity sealing cover is opened and closed with an airtight door;

[0032] The winding assembly comprises a winch disc arranged above the inner cavity sealing cover, a rope body is wound around the outer side of the winch disc, a male head is arranged at the end of the rope body, a female head matching the male head is arranged on the sealing cover, and the air gripper is arranged to control the separation and combination of the female head and the male head;

[0033] The step S4 comprises:

[0034] S41. The air claw is raised, and the air claw drives the sampler to be removed from the container body through the sealing cover;

[0035] S42. The air claw rises to position 2, and the airtight door opens;

[0036] S43. The cylinder telescopic assembly drives the air claw to move, and the air claw clamps the sampler and moves through the airtight door into the sealed chamber;

[0037] S44. After the sampler enters the sealed cavity and is in place, the air claw rises to position three, and the female head on the sealing cover is connected to the male head at the end of the rope body of the winding assembly;

[0038] S45. The air gripper releases the sealing cover, and the air gripper withdraws from the sealing cavity;

[0039] S46. The cylinder on the airtight door is actuated and the airtight door is closed.

[0040] Preferably, the sealed cavity is connected to the high-pressure argon gas bottle, and the passage between the sealed cavity and the reaction kettle to be sampled is connected by an electric-controlled ball valve for opening and closing. In step S4, the electric-controlled ball valve closes the passage between the sealed cavity and the reaction kettle to be sampled;

[0041] The step S5 comprises:

[0042] S51. A high-pressure argon gas cylinder is filled with argon gas through a gas pipe into the sealed cavity to replace the air in the sealed cavity;

[0043] S52. After monitoring, if the air in the sealed cavity is replaced by argon gas, the electrically controlled ball valve is opened;

[0044] S53. The sampler is lowered into the reactor through the channel by the winding assembly;

[0045] S54. The sampler is lowered into place, and the medium in the reactor enters the sampler.

[0046] Preferably, step S6 comprises:

[0047] S61. Reset the winding assembly, transfer the sampler to the sealed chamber through the winding assembly, and when the sampler is located at position three, the winding assembly stops working;

[0048] S62. Open the airtight door;

[0049] S63. The cylinder telescopic assembly moves, the air claw opens, and the air claw enters the sealed cavity through the airtight door;

[0050] S64. After the air gripper enters the sealing cavity and reaches its position, the air gripper rises to position three, and the air gripper closes and clamps the sealing cover;

[0051] S65. The air claw rises to position 2, and the female head on the sealing cover and the male head at the end of the winding assembly rope body are disengaged;

[0052] S66. The air gripper withdraws the sampler through the airtight door;

[0053] S67. Close the airtight door.

[0054] Preferably, the step S7 comprises:

[0055] S71. The air claw of the displacement assembly moves to position five;

[0056] S72. The opening and closing assembly drives the first wheel to rotate in the opposite direction, and the first wheel drives the container body to rotate through the tightening cylinder, and the thread between the container body and the sealing cover is locked;

[0057] S73. The tightening cylinder in the opening and closing assembly retracts.

[0058] Preferably, the step S8 comprises:

[0059] S81. The air gripper with the sealed container containing the sampler rises to position 1 and waits;

[0060] S82. Open the manhole cover, manually remove the sealed container with the sampler inside, install another sealed container with the sampler inside, and enter the next round of sampling cycle.

[0061] Compared with the prior art, the present invention has the following beneficial effects:

[0062] The method is applicable to sampling carbon fiber precursor solution, adopts automated sampling, greatly reduces labor intensity, and is safe and reliable. The medium in the reactor is sealed through a closed sealing cavity and an openable and closable channel between the sealing cavity and the reactor, thereby ensuring the sealing of the high-temperature corrosive medium and preventing air from entering the reactor and contacting the high-temperature corrosive medium to generate toxic and harmful substances. Inert gas is further used to replace the air in the sealing cavity, thereby ensuring the sealing of the high-temperature corrosive medium. At the same time, an opening and closing component is provided to fix and tighten the sealed container, so that the sealed container can be disassembled to take out the sampler, thereby avoiding leakage of toxic media.

[0063] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 This is a schematic diagram of one viewing angle of the overall device for sampling carbon fiber precursor solution according to the present invention;

[0065] Figure 2 This is a schematic diagram of another viewing angle of the whole device for sampling carbon fiber precursor solution according to the present invention;

[0066] Figure 3 This is a schematic diagram of the inside of an airtight cover of a device suitable for sampling carbon fiber precursor solution according to the present invention;

[0067] Figure 4 This is a schematic diagram of an opening and closing component in a device suitable for sampling carbon fiber precursor solution according to the present invention;

[0068] Figure 5 This is a schematic diagram of the connection between a winding assembly and an inner cavity sealing cover in a device suitable for sampling carbon fiber precursor solution according to the present invention;

[0069] Figure 6 This is a schematic diagram of a winding component in a device suitable for sampling carbon fiber precursor solution according to the present invention;

[0070] Figure 7 This is a schematic diagram of the connection between a sampler and a sealed container in a device suitable for sampling carbon fiber precursor solution according to the present invention;

[0071] Figure 8 This is a schematic diagram of the connection between a male head and a rope body in a device suitable for sampling carbon fiber precursor solution according to the present invention;

[0072] Figures 9 to 32 The present invention is a schematic diagram of the steps of a method for sampling carbon fiber precursor solution. DETAILED DESCRIPTION

[0073] The following description is used to fully explain the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0074] The present invention provides a technical solution: a method for sampling carbon fiber precursor solution, comprising the steps of:

[0075] S1. Providing a sealed container 800 having a sampler 900 therein, wherein the sealed container 800 is an openable and closable sealed container 800;

[0076] S2. See Fig.11 , placing the sealed container 800 in the displacement assembly 200 at position one;

[0077] S3. See Fig.13 and 14 , the sealed container 800 is transferred to the opening and closing component 300 by the displacement component 200, and the opening and closing component 300 positions and opens the sealed container 800;

[0078] S4. See Figure 15-19, the sampler 900 is transferred into the sealed cavity 501 through the displacement assembly 200, and the sampler 900 is connected to the winding assembly 400 located in the sealed cavity 501, the displacement assembly 200 and the sampler 900 are separated and transferred to the outside of the sealed cavity 501, wherein a channel is provided between the sealed cavity 501 and the reaction kettle 700 to be sampled, and the channel is sealed;

[0079] S5. See Figure 20-23 , the air in the sealed cavity 501 is replaced with an inert gas, and after the replacement is qualified, the channel between the sealed cavity 501 and the reaction kettle 700 to be sampled is opened, and the winding component 400 transfers the sampler 900 to the reaction kettle 700 through the channel, and the sampler 900 samples the medium in the reaction kettle 700;

[0080] S6. See Figure 25-28 After the sampler 900 has completed sampling, the sampler 900 is transferred into the sealed cavity 501 by the winding assembly 400, and the sampler 900 and the winding assembly 400 are separated and transferred out of the sealed cavity 501 by the displacement assembly 200;

[0081] S7. See Fig.29 and Fig.30 , placing the sampler 900 into the sealed container 800 on the opening and closing component 300 through the displacement component 200, and sealing the sampler 900 in the sealed container 800 through the opening and closing component 300;

[0082] S8. See Fig.31 and Fig.32 , the displacement assembly 200 transfers the sealed container 800 to position one.

[0083] See also Figure 5 The sealed cavity 501 is surrounded by an inner cavity sealing cover 500, and a fixing plate is installed on the outer side of the inner cavity sealing cover 500, and the fixing plate supports and connects the displacement assembly 200;

[0084] See also Figure 1 and 2 The displacement assembly 200, the opening and closing assembly 300, the winding assembly 400 and the sealed chamber 501 are all arranged above the equipment operation platform 100, and the reactor 700 is arranged below the equipment operation platform 100. The outer covers of the displacement assembly 200, the opening and closing assembly 300, the sealed chamber 501 and the winding assembly 400 are provided with an airtight cover 600, and a manhole cover 601 is provided on the airtight cover 600. The manhole cover 601 corresponds to the position 1 of the displacement assembly 200. Between steps S1 and S2, see Fig.10 , open the manhole cover 601 on the airtight cover 600, and place the sealed container 800 on the displacement assembly 200 through the manhole cover 601. Between steps S2 and S3, see Fig.12 , close the manhole cover 601 on the airtight cover 600.

[0085] Furthermore, a camera is provided in the airtight cover 600, and the camera is used to monitor the working status of each component in the airtight cover 600. After the manhole cover 601 on the airtight cover 600 is closed, the camera is turned on.

[0086] See also Figure 7 The sealed container 800 includes a container body 801 and a sealing cover 802. The container body 801 is provided with an inlet and outlet for the sampler 900 to enter and exit. The sealing cover 802 opens and closes the inlet and outlet and is connected to the sampler 900 through a rope. The displacement assembly 200 corresponds to the sealing cover 802.

[0087] See also Figure 3 The displacement assembly 200 includes an air gripper 203, a vertically arranged slide rail 201 and a horizontally arranged cylinder telescopic assembly 202. The slide rail 201 is movably mounted with the cylinder telescopic assembly 202. The cylinder telescopic assembly 202 cooperates with a servo motor and a screw rod to move on the slide rail 201. The cylinder telescopic assembly 202 includes a telescopic cylinder. The telescopic cylinder drives and connects the air gripper 203. The air gripper 203 is driven by the air gripper 203 cylinder. The air gripper 203 is configured to grab the sealing cover 802. A proximity switch for detecting that the cylinder telescopic assembly 202 has descended into place is provided below the slide rail 201.

[0088] The displacement assembly 200 is divided into five working positions according to the position of the air gripper 203 , namely position one, position two, position three, position four and position five.

[0089] The step S3 comprises:

[0090] S31. The servo motor drives the cylinder telescopic assembly 202 through the screw to move on the slide rail 201;

[0091] S32. The cylinder telescopic assembly 202 drops to position four, see Fig.13 After the proximity switch senses that the cylinder telescopic assembly 202 has descended into place, the opening and closing assembly 300 is started.

[0092] See also Figure 7The container body 801 is a cylindrical container body 801, the inlet and outlet are located at one end of the container body 801 in the length direction, and matching threads are provided on the inner side of the inlet and outlet and the outer side of the sealing cover 802;

[0093] See also Figure 4 The opening and closing assembly 300 includes a rotatable first wheel body 301, a socket capable of accommodating the container body 801 is reserved at the center of the first wheel body 301, a plurality of tightening cylinders 302 are installed on the first wheel body 301 and are arranged radially along the first wheel body 301, the tightening cylinders 302 are arranged at intervals along the circumference of the first wheel body 301, and the movable ends of the tightening cylinders 302 face the center of the socket; a trachea joint is provided at one end of the tightening cylinder 302 facing the radial outer side of the pulley;

[0094] A rotatable second wheel body 303, wherein the second wheel body 303 is driven by a servo motor, the second wheel body 303 is connected to the first wheel body 301 by a belt drive, and the radial dimension of the second wheel body 303 is smaller than the radial dimension of the first wheel body 301;

[0095] The first wheel body 301 and the second wheel body 303 are arranged above the adjustable support, the servo motor is arranged below the adjustable support, and a guide sleeve is arranged below the first wheel body 301, and the opening of the guide sleeve is arranged toward the socket on the first wheel body 301.

[0096] Continue to see Figure 7 Furthermore, the outer wall of the container body 801 is provided with a tightening groove 8011 corresponding to the tightening cylinder 302.

[0097] In step S32 , the sealed container 800 enters the guide sleeve through the insertion hole on the first wheel body 301 .

[0098] The step S3 further comprises:

[0099] S33. The movable end of the tightening cylinder 302 tightens the sealed container 800, wherein the movable end of the tightening cylinder 302 is inserted into the tightening groove 8011;

[0100] S34. The servo motor drives the second wheel body 303 to rotate, the second wheel body 303 drives the first wheel body 301 to rotate through the belt, the first wheel body 301 drives the container body 801 to rotate through the tightening cylinder 302, and the thread between the container body 801 and the sealing cover 802 is disengaged; in one embodiment, the servo motor drives the second wheel body 303 to rotate counterclockwise, the second wheel body 303 drives the first wheel body 301 to rotate counterclockwise through the belt with a certain reduction ratio, so that the thread between the container body 801 and the sealing cover 802 is disengaged.

[0101] See also Figure 3 The inner cavity sealing cover 500 is opened and closed with an airtight door 502, and the airtight door 502 is driven by a cylinder;

[0102] See also Figure 5 and 6 The winding assembly 400 includes a hoisting disc 401 disposed above the inner cavity sealing cover 500, and a steel wire rope 402 is wound around the outer side of the hoisting disc 401, see Figure 7 and 8 A male head 4021 is provided at the end of the steel wire rope 402, a female head 8021 matching the male head 4021 is provided on the sealing cover 802, and the air claw 203 is configured to control the separation and combination of the female head 8021 and the male head 4021.

[0103] In one embodiment, the specific structure of the male head 4021 and the female head 8021 is the same as the structure of a sampling device suitable for carbon fiber precursor solution disclosed in the invention application with application number 202411800265X, wherein the male head 4021 is equivalent to a clamping member, and the female head 8021 is equivalent to a combined structure of an inner set, an extrusion member, a restraining member and an outer set. When in use, the clamp corresponds to the outer set, and the clamp controls the rise and fall of the outer set to achieve the splitting and combination between the female head 8021 and the male head 4021.

[0104] Continue to see Figure 6 Further, the winding assembly 400 includes:

[0105] A servo motor is installed above the sealing cover, and the output end of the servo motor is connected to a winch driving wheel. The winch driving wheel is connected to the winch disc 401 through a belt. The radial dimension of the winch driving wheel is smaller than the radial dimension of the winch disc 401. A pair of rolling gears with slots are also provided on the output end of the servo motor. The slots of the pair of rolling gears match the wire rope 402. When in use, the pair of rolling gears guide the wire rope 402.

[0106] Furthermore, the winding assembly 400 further includes a winding camera, which is disposed above the inner cavity sealing cover 500 and is disposed toward the winding disc 401 .

[0107] The step S4 comprises:

[0108] S41. Referring to 15, the servo motor drives the cylinder telescopic assembly 202 and the air claw 203 to rise through the screw, and the air claw 203 drives the sampler 900 to be removed from the container body 801 through the sealing cover 802;

[0109] S42. See Fig.16 , the air claw 203 rises to position 2, the cylinder on the airtight door 502 is actuated, and the airtight door 502 is opened;

[0110] S43.See Fig.17 The cylinder telescopic assembly 202 drives the air claw 203 to move, and the air claw 203 clamps the sampler 900 and moves through the airtight door 502 into the sealed chamber 501;

[0111] S44. See Fig.18 After the sampler 900 enters the sealed cavity 501 and is in place, the air claw 203 rises to position three, and the female head 8021 on the sealing cover 802 is connected to the male head 4021 at the end of the wire rope 402 of the winding assembly 400;

[0112] S45.See Fig.19 , the air gripper 203 releases the sealing cover 802, and the air gripper 203 withdraws from the sealing cavity 501;

[0113] S46.See Fig. 20 , the cylinder on the airtight door 502 is actuated and the airtight door 502 is closed.

[0114] See also Figure 1 The sealed cavity 501 is connected to one end of the air pipe, and the other end of the air pipe is connected to the high-pressure argon gas bottle 503. The passage between the sealed cavity 501 and the reaction kettle 700 to be sampled is opened and closed by the electric-controlled ball valve 701. In the step S4, the electric-controlled ball valve 701 closes the passage between the sealed cavity 501 and the reaction kettle 700 to be sampled. The electric-controlled ball valve 701 and the passage are connected by a flange.

[0115] The step S5 comprises:

[0116] S51. Continue to see Fig. 20The high-pressure argon gas bottle 503 fills the sealed cavity 501 with argon gas through the gas pipe to replace the air in the sealed cavity 501. The density of argon gas is greater than that of air. The air is squeezed out through the hole at the top of the airtight cavity to prevent the air from entering the reactor 700 and contacting with the high-temperature corrosive medium to produce toxic and harmful substances.

[0117] S52. See Fig.21 After monitoring, when the air in the sealing chamber 501 is replaced by argon gas and passes the replacement, the electric-controlled ball valve 701 is opened;

[0118] S53.See Fig. 22 , start the servo motor in the winding assembly 400, the servo motor drives the hoisting drive wheel to rotate, the hoisting drive wheel drives the hoisting disc 401 to rotate at a certain reduction ratio through the belt, and the wire rope 402 on the hoisting disc 401 drives the sampler 900 to descend through the channel into the reactor 700;

[0119] S54.See Fig.23 , the steel wire rope 402 is lowered into place, and the high-temperature corrosive medium in the reactor 700 enters the sampler 900 through the liquid inlet of the sampler 900 .

[0120] The winding assembly 400 further includes a limit switch, which corresponds to the sampler 900 located at position three, and the limit switch is electrically connected to the servo motor in the winding assembly 400 .

[0121] The step S6 comprises:

[0122] S61.See Fig.24 , resetting the winding assembly 400, transferring the sampler 900 into the sealed chamber 501 through the winding assembly 400, when the sampler 900 is located at position three, the limit switch is triggered, and the winding assembly 400 stops working;

[0123] S62. See Fig.25 , open the airtight door 502;

[0124] S63. The cylinder telescopic assembly 202 is actuated, the air claw 203 is opened, and the air claw 203 enters the sealed chamber 501 through the airtight door 502;

[0125] S64. After the air gripper 203 enters the sealing cavity 501 and is in place, the air gripper 203 rises to position three, and the air gripper 203 closes and clamps the sealing cover 802;

[0126] S65. The air claw 203 rises to position 2, and the female head 8021 on the sealing cover 802 and the male head 4021 at the end of the wire rope 402 of the winding assembly 400 are disengaged;

[0127] S66.See Fig. 27 , the air gripper 203 withdraws the sampler 900 through the airtight door 502;

[0128] S67.See Fig.28 , the airtight door 502 drives the cylinder to move, and the airtight door 502 is closed.

[0129] The step S7 comprises:

[0130] S71. See Fig.29 , the air claw 203 descends to position five and stops descending;

[0131] S72. See Fig.30 The servo motor in the opening and closing component 300 rotates clockwise, and the servo motor in the opening and closing component 300 drives the second wheel body 303 to rotate. The second wheel body 303 drives the first wheel body 301 to rotate through a belt at a certain reduction ratio. The first wheel body 301 drives the container body 801 to rotate through the tightening cylinder 302, and the thread between the container body 801 and the sealing cover 802 is locked.

[0132] S73. The tightening cylinder 302 in the opening and closing assembly 300 retracts.

[0133] The step S8 comprises:

[0134] S81.See Fig.31 , the air gripper 203 carries the sealed container 800 with the sampler 900 inside and rises to position 1 to wait;

[0135] S82. See Fig.32 , open the manhole cover 601, manually remove the sealed container 800 with the sampler 900 installed inside, install another sealed container 800 with the sampler 900 installed inside, and enter the next round of sampling cycle.

[0136] In summary, the method for sampling carbon fiber precursor solution has the following advantages:

[0137] 1. This patent adopts automatic sampling, which greatly reduces the labor intensity and is safe and reliable;

[0138] 2. The airtight door 502 and the electric-controlled ball valve 701 are used to ensure the sealing of the high-temperature corrosive medium, preventing air from entering the reactor 700 and contacting with the high-temperature corrosive medium to produce toxic and harmful substances;

[0139] 3. The air in the sealed cavity 501 is replaced by inert gas to ensure the sealing of high-temperature corrosive media;

[0140] 4. The winding assembly 400 adopts a winch drive mode, and the sampler 900 is suspended by a steel wire rope 402 for sampling, which can save sampling space;

[0141] 5. A structure with a quick disassembly function is provided between the sampler 900 and the winding assembly 400, which can cooperate with the displacement assembly 200 to quickly realize the connection and disconnection between the two;

[0142] 6. By providing the opening and closing assembly 300 , the opening and closing assembly 300 can fix and tighten the sealed container 800 , and at the same time can disassemble the sealed container 800 to take out the sampler 900 .

[0143] The embodiments described above are only used to illustrate the technical ideas and features of the present invention, and their purpose is to enable technicians in this field to understand the contents of the present invention and implement them accordingly. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A method for sampling carbon fiber precursor solution, characterized in that: Includes steps: S1. Providing a sealed container (800) having a sampler (900) therein, wherein the sealed container (800) is an openable and closable sealed container (800); S2. placing the sealed container (800) in the displacement assembly (200) at position one; S3. The sealed container (800) is transferred to the opening and closing component (300) by the displacement component (200), and the opening and closing component (300) positions and opens the sealed container (800); S4. The sampler (900) is transferred into the sealed cavity (501) by the displacement assembly (200), and the sampler (900) is connected to the winding assembly (400) located in the sealed cavity (501), and the displacement assembly (200) and the sampler (900) are separated and transferred to the outside of the sealed cavity (501), wherein a channel is provided between the sealed cavity (501) and the reaction kettle (700) to be sampled, and the channel is sealed; S5. The air in the sealed cavity (501) is replaced with an inert gas. After the replacement is qualified, the passage between the sealed cavity (501) and the reaction kettle (700) to be sampled is opened, and the winding component (400) transfers the sampler (900) into the reaction kettle (700) through the passage, and the sampler (900) samples the medium in the reaction kettle (700); S6. After the sampler (900) has completed sampling, the sampler (900) is transferred into the sealed cavity (501) by the winding assembly (400), and the sampler (900) and the winding assembly (400) are separated and transferred out of the sealed cavity (501) by the displacement assembly (200); S7. placing the sampler (900) into the sealed container (800) on the opening and closing component (300) through the displacement component (200), and sealing the sampler (900) in the sealed container (800) through the opening and closing component (300); S8. The displacement assembly (200) transfers the sealed container (800) to position one.

2. A method for sampling carbon fiber precursor solution according to claim 1, characterized in that: The sealed cavity (501) is surrounded by an inner cavity sealing cover (500); the displacement assembly (200), the opening and closing assembly (300), the winding assembly (400) and the sealed cavity (501) are all arranged above the equipment operating platform (100); the reaction kettle (700) is arranged below the equipment operating platform (100); and the outer covers of the displacement assembly (200), the opening and closing assembly (300), the sealed cavity (501) and the winding assembly (400) are arranged An airtight cover (600) is provided, and a manhole cover (601) is arranged on the airtight cover (600), and the manhole cover (601) corresponds to position one of the displacement assembly (200). Between steps S1 and S2, the manhole cover (601) on the airtight cover (600) is opened, and the sealed container (800) is placed on the displacement assembly (200) through the manhole cover (601). Between steps S2 and S3, the manhole cover (601) on the airtight cover (600) is closed.

3. A method for sampling carbon fiber precursor solution according to claim 1, characterized in that: The sealed container (800) comprises a container body (801) and a sealing cover (802); the container body (801) is provided with an inlet and outlet for the sampler (900) to enter and exit; the sealing cover (802) opens and closes the inlet and outlet and is connected to the sampler (900); the displacement assembly (200) corresponds to the sealing cover (802); The displacement assembly (200) comprises an air gripper (203), a vertically arranged slide rail (201) and a horizontally arranged cylinder telescopic assembly (202); the cylinder telescopic assembly (202) is movably mounted on the slide rail (201); the cylinder telescopic assembly (202) is driven to connect to the air gripper (203); the air gripper (203) is configured to grasp the sealing cover (802); The step S3 comprises: S31. Move the cylinder telescopic assembly (202) on the slide rail (201); S32. Move the air claw (203) to position four through the cylinder telescopic assembly (202) and start the opening and closing assembly (300).

4. A method for sampling carbon fiber precursor solution according to claim 3, characterized in that: The container body (801) is a cylindrical container body, the inlet and outlet are located at one end of the container body (801) in the length direction, and matching threads are provided on the inner side of the inlet and outlet and the outer side of the sealing cover (802); The opening and closing assembly (300) comprises a rotatable first wheel body (301), a socket capable of accommodating the container body (801) is reserved at the center of the first wheel body (301), and a tightening cylinder (302) is mounted on the first wheel body (301) and is arranged radially along the first wheel body (301); The step S3 further comprises: S33. Tightening the sealed container (800) by the tightening cylinder (302); S34. The first wheel body (301) cooperates with the tightening cylinder (302) to drive the container body (801) to rotate, and the thread between the container body (801) and the sealing cover (802) is disengaged.

5. A method for sampling carbon fiber precursor solution according to claim 4, characterized in that: The opening and closing assembly (300) further comprises: a rotatable second wheel body (303), the second wheel body (303) being driven and connected via a servo motor, the second wheel body (303) being connected to the first wheel body (301) via a belt drive, and the radial dimension of the second wheel body (303) being smaller than the radial dimension of the first wheel body (301); The outer wall of the container body (801) is provided with a tightening groove (8011) corresponding to the tightening cylinder (302); In step S33, the movable end of the tightening cylinder (302) is inserted into the tightening groove (8011); In step S34, the second wheel body (303) is driven to rotate by a servo motor, and the second wheel body (303) drives the first wheel body (301) to rotate via the belt.

6. A method for sampling carbon fiber precursor solution according to claim 3, characterized in that: The inner cavity sealing cover (500) is connected to an airtight door (502) for opening and closing; The winding assembly (400) comprises a hoisting disc (401) arranged above the inner cavity sealing cover (500), a rope body (402) is wound around the outer side of the hoisting disc (401), a male head (4021) is arranged at the end of the rope body (402), a female head (8021) matching the male head (4021) is arranged on the sealing cover (802), and the air claw (203) is configured to control the separation and combination of the female head (8021) and the male head (4021); The step S4 comprises: S41. The air claw (203) is raised, and the air claw (203) drives the sampler (900) to be removed from the container body (801) through the sealing cover (802); S42. The air claw (203) rises to position 2, and the airtight door (502) opens; S43. The cylinder telescopic assembly (202) drives the air claw (203) to move, and the air claw (203) clamps the sampler (900) and moves through the airtight door (502) into the sealed chamber (501); S44. After the sampler (900) enters the sealed cavity (501) and is in place, the air claw (203) rises to position three, and the female head (8021) on the sealing cover (802) and the male head (4021) at the end of the rope body (402) of the winding assembly (400) are connected; S45. The air gripper (203) releases the sealing cover (802), and the air gripper (203) withdraws from the sealing cavity (501); S46. The cylinder on the airtight door (502) is actuated, and the airtight door (502) is closed.

7. A method for sampling carbon fiber precursor solution according to claim 1, characterized in that: The sealed cavity (501) is connected to the high-pressure argon gas bottle (503), and the passage between the sealed cavity (501) and the reaction kettle to be sampled (700) is opened and closed by an electric-controlled ball valve (701). In step S4, the electric-controlled ball valve (701) closes the passage between the sealed cavity (501) and the reaction kettle to be sampled (700); The step S5 comprises: S51. The high-pressure argon gas bottle (503) is filled with argon gas into the sealed cavity (501) through the gas pipe to replace the air in the sealed cavity (501); S52. After monitoring, if the air in the sealed cavity (501) is replaced by argon gas and passes the replacement, the electrically controlled ball valve (701) is opened; S53. The sampler (900) is lowered into the reactor (700) through the channel by the winding assembly (400); S54. The sampler (900) is lowered into place, and the medium in the reactor (700) enters the sampler (900).

8. A method for sampling carbon fiber precursor solution according to claim 6, characterized in that: The step S6 comprises: S61. Reset the winding assembly (400), transfer the sampler (900) into the sealed chamber (501) through the winding assembly (400), and when the sampler (900) is located at position three, the winding assembly (400) stops working; S62. Open the airtight door (502); S63. The cylinder telescopic assembly (202) is actuated, the air claw (203) is opened, and the air claw (203) enters the sealed chamber (501) through the airtight door (502); S64. After the air gripper (203) enters the sealing cavity (501) and is in place, the air gripper (203) rises to position three, and the air gripper (203) closes and clamps the sealing cover (802); S65. The air claw (203) rises to position two, and the female head (8021) on the sealing cover (802) and the male head (4021) at the end of the rope body (402) of the winding assembly (400) are disengaged; S66. The air gripper (203) withdraws the sampler (900) through the airtight door (502); S67. Close the airtight door (502).

9. A method for sampling carbon fiber precursor solution according to claim 4, characterized in that: The step S7 comprises: S71. The air claw (203) of the displacement assembly (200) moves to position five; S72. The opening and closing assembly (300) drives the first wheel body (301) to rotate in the opposite direction, and the first wheel body (301) drives the container body (801) to rotate through the tightening cylinder (302), and the threads between the container body (801) and the sealing cover (802) are locked; S73. The tightening cylinder (302) in the opening and closing assembly (300) is retracted.

10. A method for sampling carbon fiber precursor solution according to claim 2, characterized in that: The step S8 comprises: S81. The air gripper (203) with the sealed container (800) containing the sampler (900) rises to position 1 and waits; S82. Open the manhole cover (601), manually remove the sealed container (800) containing the sampler (900), install another sealed container (800) containing the sampler (900), and enter the next sampling cycle.

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