A cellulose acetate filament slurry detection sampling apparatus

Abstract

The present application relates to the technical field of slurry detection, in particular to a kind of acetic acid fiber filament slurry detection sampling equipment, including sampling box, annular air bag, operating frame and sampling mechanism.Two sampling tubes are used in the present application to sample the center area and the near-wall area of the sealed tank respectively, and multiple sampling ports in the same sampling tube correspond to different height sampling points in the same area, thereby uniform sampling at different heights and sampling at the center position and near-wall of the tank are carried out, reducing the error caused by non-uniform sampling.Secondly, by the way of entering the slurry through spiral rotation and the way of leading into the outside flared mouth first, the cutting speed during sampling is reduced, thereby avoiding the reduction of slurry viscosity caused by the sampling process, affecting the authenticity and reliability of the detection data.

Description

Technical Field

[0001] This invention relates to the field of slurry testing technology, specifically to a sampling device for testing slurry in cellulose acetate filaments. Background Technology

[0002] Cellulose acetate filament slurry is a key intermediate in the production of cellulose acetate filament. It is a viscous solution formed by cellulose acetate solution in a specific solvent (mainly acetone). This type of solution is a thermodynamically stable solution with extremely high viscosity, exhibiting non-Newtonian fluid (thinning due to high shear force) characteristics, and is highly flammable and explosive.

[0003] In large-scale production, it is necessary to conduct random inspections on each batch or tank of slurry to ensure that the viscosity, stability, concentration and uniformity of the slurry meet production requirements. Currently, the common practice is to first seal the top of the storage tank and pump in inert gas to seal it, and then open the top end cap for sampling and inspection.

[0004] The following problems exist in the current sampling process: because high-viscosity slurry is prone to stratification in storage tanks, the test results of a single sample taken from a single location are difficult to represent the actual situation of the slurry. Although taking multiple samples from random locations in the tank can improve the representativeness of the samples, it is still difficult to reflect the actual values ​​of each layer of the slurry after stratification.

[0005] Secondly, during the process of sinking the commonly used vertical sampling tube into the slurry, the high viscosity of the slurry increases the shear force on the slurry as the sampling tube moves down to collect samples, causing the slurry to become thinner and affecting its true viscosity value. Therefore, the test values ​​of the sample are difficult to reflect the true properties of the slurry. Summary of the Invention

[0006] Therefore, it is necessary to provide a sampling and testing device for cellulose acetate filament slurry, which aims to solve the problems of the prior art.

[0007] This application provides a sampling device for testing cellulose acetate filament slurry, which is installed on a mobile device and includes: a sampling box installed on the mobile device, a through groove at the lower end of the sampling box, an annular airbag fixedly installed on the lower inner wall of the sampling box above the through groove, and a sealing component for sealing the sampling box on the mobile device.

[0008] The sampling box has operating frames that slide back and forth on both the left and right sides inside. Between the two operating frames, there is a lid opening mechanism and a sampling mechanism for opening the top opening of the storage tank.

[0009] The sampling mechanism comprises a lifting frame, the lifting frame is arranged between the two operation frames and slides up and down, the lifting frame is provided with two sampling tubes arranged radially along the annular air bag and in a spiral shape, and the lifting frame is provided with a reference part for determining the axis of the storage tank by clamping.

[0010] After the reference part determines the axis of the storage tank, one of the sampling tubes is located at the center of the storage tank, and the other sampling tube is close to the tank wall of the storage tank.

[0011] The lower end of the sampling tube is provided with an outer flared mouth for controlling the shearing force.

[0012] The sampling tube is provided with a plurality of sampling ports arranged equidistantly up and down, and the sampling box is provided with a sampling group for taking out the slurry of the required height in the sampling tube.

[0013] The operation frame is provided with a driving group for driving the rotation of the sampling tube.

[0014] According to an advantageous embodiment, the cover opening mechanism comprises a mechanical arm one for disassembling the bolt and a mechanical arm two for negative pressure suction of the end cover, the end cover is disassembled by the mechanical arm one after sealing and is grabbed by the mechanical arm, and the upper end of the storage tank is opened as the operation frame moves forward.

[0015] According to an advantageous embodiment, the reference part comprises an arc-shaped plate, the sampling box is provided with two arc-shaped plates arranged in front and back, the front arc-shaped plate is fixedly arranged on the sampling box, and the rear arc-shaped plate is fixedly arranged between the two operation frames.

[0016] According to an advantageous embodiment, the distance between the rear arc-shaped plate and the front sampling tube matches and corresponds to the radius value of the storage tank.

[0017] According to an advantageous embodiment, the lifting frame is fixedly provided with a spacing frame, the lower end surface of the spacing frame is fixedly provided with a fixed ring, the rear side of the fixed ring is fixedly provided with a semicircular ring through two axis lines from front to back of the electric guide rod, the fixed ring and the semicircular ring are both rotationally provided with a rotating plate, the sampling tube is fixedly arranged on the corresponding rotating plate, and the center line of the thread line of the sampling tube is collinear with the center line of the corresponding rotating plate.

[0018] The caliber of the outer flared mouth gradually decreases from top to bottom along the thread line of the sampling tube.

[0019] According to an advantageous embodiment, the fixed ring and the semicircular ring are both provided with a sealing part, the sealing part comprises a matching plate, the fixed ring and the semicircular ring are both provided with the matching plate which slides up and down through the electric telescopic rod, and the matching plate seals the sampling by matching the upper end opening of the sampling tube.

[0020] According to an advantageous embodiment, the driving group comprises rotating shafts, the rotating shafts are vertically arranged on the rotating plate, and the telescopic sleeve rods are rotatably arranged between the two electric guide rods through the tripod.

[0021] The bevel gears are fixedly arranged on both ends of the telescopic sleeve rods and the rotating shafts, the bevel gears on the telescopic sleeve rods are engaged with the bevel gears on the adjacent rotating shafts, and the front rotating shaft penetrates through the partition frame and is fixedly installed on the output shaft of the motor installed on the lifting frame.

[0022] According to an advantageous embodiment, the sampling tubes are fixedly arranged with elastic sheets corresponding to the sampling ports.

[0023] According to an advantageous embodiment, the sampling group comprises sampling frames, the sampling frames are slidably arranged on the left and right sides in the sampling box through the electric push rods, the right sampling frame is fixedly arranged with abutting sleeves corresponding to the sampling ports, the left sampling frame is fixedly arranged with sampling sleeves corresponding to the sampling ports, the sampling sleeves are connected with the sampling pump fixedly installed at the bottom of the sampling box through the sampling tubes, and the slurry in the corresponding sampling tube is pumped out through the sampling pump and collected outside the sampling box.

[0024] According to an advantageous embodiment, the sampling sleeves are fixedly arranged with ejector pins for ejecting the elastic sheets.

[0025] In summary, the present application has at least one of the following beneficial effects: in the present application, two sampling tubes are used to sample the central region and the near-wall region of the storage tank respectively, the multiple sampling ports in the same sampling tube correspond to different height sampling points in the same region, thereby uniform sampling at different heights and sampling at the central position and the near-wall position of the tank body are realized, and the error caused by non-uniform sampling is reduced.

[0026] Secondly, the cutting edge rate in the sampling process is reduced through the spiral rotating into the slurry mode and the outward flared port first guiding into the mode, thereby avoiding the reduction of the slurry viscosity caused by the sampling process and affecting the authenticity and reliability of the detection data. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only belong to the embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0028] Figure 1 A perspective structural schematic diagram of an acetate filament slurry detection sampling device provided by an embodiment of the present application is shown.

[0029] Figure 2A partial structural front view of a sampling device for detecting cellulose acetate filament slurry according to an embodiment of the present invention is shown.

[0030] Figure 3 A partial cross-sectional perspective view of the three-dimensional structure between the sampling box, the operating frame, and the sampling group provided according to an embodiment of the present invention is shown.

[0031] Figure 4 A three-dimensional structural diagram of the arc-shaped plate, drive assembly, and lifting frame provided according to an embodiment of the present invention is shown.

[0032] Figure 5 A front view of the lifting frame, fixing ring, and semicircular ring provided according to an embodiment of the present invention is shown.

[0033] Figure 6 A three-dimensional structural diagram of the sampling tube, fixing ring, and semi-circular ring provided according to an embodiment of the present invention is shown.

[0034] Figure 7 A partial cross-sectional view of the sampling tube, sampling sleeve, and clamping sleeve provided according to an embodiment of the present invention is shown.

[0035] Figure 8 The present invention provides an embodiment of the invention. Figure 7 Enlarged view of point A in the middle.

[0036] The above-mentioned figures include the following reference numerals: 1. Sampling box; 2. Mobile device; 3. Annular airbag; 4. Sealing assembly; 5. Operating frame; 6. Robotic arm one; 60. Robotic arm two; 7. Sampling mechanism; 70. Lifting frame; 700. Sampling tube; 701. Sampling port; 702. Separating frame; 703. Fixing ring; 704. Semicircular ring; 705. Rotating plate; 710. Arc plate; 72. Outward flare; 73. Sampling group; 730. Sampling frame; 731. Clamping sleeve; 732. Sampling sleeve; 733. Sampling pump; 734. Ejector pin; 74. Adhesive plate; 75. Drive group; 750. Rotating shaft; 751. Telescopic sleeve rod; 752. Bevel gear; 753. Tripod; 76. Spring. Detailed Implementation

[0037] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] like Figure 1 ,Figure 2 and Figure 4 As shown, a sampling device for testing cellulose acetate filament slurry is installed on a mobile device 2, including: a sampling box 1 installed on the mobile device 2. It should be noted that the mobile device 2 is equipped with a weight block (which is prior art and is not shown in the figure and will not be described in detail here) to maintain its stability and prevent the sampling box 1 and the mobile device 2 from tipping over. A circular through groove is opened at the lower end of the sampling box 1. An annular airbag 3 is fixedly installed on the lower inner wall of the sampling box 1 above the through groove. The annular airbag 3 is connected to an air pump (not shown in the figure). A sealing component 4 is installed on the mobile device 2. The sealing component 4 includes a gas cylinder and an air pump. The air pump 2 in the sealing component 4 pumps the inert gas in the gas cylinder into the sealed sampling box 1. Then, the air pump 1 pumps the gas into the annular airbag 3 so that the annular airbag 3 fits against the upper end of the storage tank for sealing.

[0039] like Figure 3 As shown, the sampling box 1 has operating frames 5 that slide back and forth on both the left and right sides. The operating frames 5 are driven by electric push rods to move back and forth. The two operating frames 5 are connected by an opening mechanism and a sampling mechanism 7. The opening mechanism is located in front of the sampling mechanism 7.

[0040] like Figure 3 As shown, the opening mechanism includes a robotic arm 6 for removing bolts and a robotic arm 60 for negative pressure suction of the end cap. After sealing, the end cap of the storage tank is removed by the robotic arm 6 and grasped by the robotic arm 60. As the operating frame 5 moves forward, the upper end of the storage tank is opened.

[0041] like Figure 3 and Figure 4 As shown, the sampling mechanism 7 includes a lifting frame 70, which is slidably mounted between the two operating frames 5. The lifting frame 70 is controlled to move up and down by a lifting cylinder (not shown in the figure). Two sampling tubes 700 are arranged spirally along the annular airbag 3 on the lifting frame 70. A reference part is provided on the lifting frame 70 to determine the axis of the storage tank by clamping. After the reference part determines the axis of the storage tank, one sampling tube 700 is located at the center of the storage tank, and the other sampling tube 700 is close to the tank wall.

[0042] like Figure 6 As shown, the lower end of the sampling tube 700 is provided with an outward flare 72 for controlling the shear force.

[0043] like Figure 3 and Figure 6 As shown, the sampling tube 700 is provided with a plurality of sampling ports 701 arranged at equal intervals, and the sampling box 1 is provided with a sampling group 73 for taking out the slurry at the required height in the sampling tube 700.

[0044] like Figure 3 As shown, the operating frame 5 is equipped with a drive group 75 for driving the sampling tube 700 to rotate.

[0045] It should be noted that the mobile device 2 can move the sampling box 1 along with it and also move the sampling box 1 up and down. During operation, the mobile device 2 moves the sampling box 1 synchronously, adjusts the position of the sampling box 1 so that the through slot on the sampling box 1 is directly above the storage tank, and adjusts the height of the sampling box 1 so that the sampling area of ​​the storage tank passes through the through slot and enters the sampling box 1. After that, the mobile device 2 and the sampling box 1 stop moving.

[0046] After the above movement, the annular airbag 3 is located outside the storage tank. The sealing component 4 first pumps inert gas (such as nitrogen) into the sampling box 1 to expel the air in the sampling box 1. Then, the air pump 1 works to inflate the annular airbag 3, sealing the area between the through groove and the storage tank, thus creating a sealed environment inside the sampling box 1. At this time, the opening mechanism is located directly above the storage tank and opens the storage tank, exposing the space inside. The above sealing process and the inert gas ensure the safety of the sampling process, while reducing the volatilization of the slurry. The pressure difference also assists the slurry to enter and fill the sampling tube 700.

[0047] Then, the operating frame 5 moves forward so that the lifting frame 70 is above the storage tank. The reference part makes the front sampling tube 700 directly above the storage tank. Then, the other sampling tube 700 is adjusted so that the sampling tube 700 is close to the rear side wall inside the tank. The lifting frame 70 drives the two sampling tubes 700 to move down synchronously. During the downward movement, the sampling tube 700 is rotated by the operation of the drive group 75, so that it extends into the slurry during the rotation, so that the slurry at the required position enters the sampling tube 700. It should be noted that by using the above-mentioned spiral entry of slurry and the method of guiding the slurry into the external flare 72, the shear force disturbance of the viscosity value is reduced, ensuring the representativeness of the sample after sampling.

[0048] After sampling is completed, the sampling tube 700 is removed, and the corresponding sampling ports 701 on the two sampling tubes 700 are sampled separately through the sampling group 73. This allows for uniform sampling at different heights and sampling at the center and near the wall of the tank, reducing errors caused by non-uniform sampling.

[0049] After sealing the sampling box 1, the bolts used for sealing on the storage tank are loosened by the robotic arm 6. Then, the robotic arm grabs the upper end cap and moves it upward. The robotic arm 60 can use a grabbing action or existing negative pressure adsorption technology. The processes involved in the opening mechanism are all existing technologies and will not be elaborated on here. Other existing technologies that can move the upper end cap can be used as substitutes. The appropriate existing technology should be selected after testing by those skilled in the art.

[0050] It should be further noted that the diameter of the through groove is larger than the diameter of the top of the storage tank, and according to tests conducted by those skilled in the art, the annular airbag 3, when filled with gas, can fully fill the space between the through groove and the storage tank, ensuring the internal sealing of the sampling box 1 during sampling.

[0051] like Figure 3 and Figure 4 As shown, the reference part includes an arc plate 710. Two arc plates 710 distributed front and back are provided in the sampling box 1. The front arc plate 710 is fixedly installed on the sampling box 1, and the rear arc plate 710 is fixedly installed between the two operating frames 5. During the process of opening the cover and removing the end cover so that the sampling tube 700 is located above the opening, the two arc plates 710 cooperate to clamp the storage tank to form a sampling reference. At this time, the front sampling tube 700 is located directly above the tank.

[0052] like Figure 3 and Figure 4 As shown, the distance between the rear arc plate 710 and the front sampling tube 700 is matched with the radius of the storage tank. That is, when the rear arc plate 710 is attached to the storage tank, the front sampling tube 700 is located directly above the storage tank, ensuring the smooth operation of the center sampling.

[0053] During operation, after the sealing process is completed, the operating frame 5 drives the lifting frame 70 in the sampling mechanism 7 to move forward synchronously, and the rear arc plate 710 moves forward synchronously, so that the rear arc plate 710 is pressed against the rear side of the tank. Before sealing, the front arc plate 710 is already pressed against the front side of the tank. Therefore, at this time, the front sampling tube 700 moves synchronously to the top of the storage tank. Thus, through the front and rear clamping action of the two arc plates 710, the front sampling tube 700 is moved to the top of the center position of the storage tank, so that the sampling benchmark at the center position of the tank is determined, ensuring the accuracy of the subsequent sampling position of the slurry center.

[0054] like Figure 4 , Figure 5 and Figure 6As shown, a partition frame 702 is fixedly installed on the lifting frame 70. A fixing ring 703 is fixedly installed on the lower end face of the partition frame 702. A semi-circular ring 704 is fixedly installed on the rear side of the fixing ring 703 through two electric guide rods extending from front to back along two axes. A rotating plate 705 is rotatably installed on both the fixing ring 703 and the semi-circular ring 704. A sampling tube 700 is fixedly installed on the corresponding rotating plate 705, and the center line of the thread of the sampling tube 700 is collinear with the center line of the corresponding rotating plate 705.

[0055] The diameter of the flared port 72 gradually decreases from top to bottom along the thread of the sampling tube 700.

[0056] like Figure 6 As shown, both the fixing ring 703 and the semicircular ring 704 are provided with a sealing part, which includes a bonding plate 74. The bonding plate 74 is slidably provided on both the fixing ring 703 and the semicircular ring 704 via an electric telescopic rod. The bonding plate 74 is bonded to the upper opening of the sampling tube 700 to seal the sample, making it easy to remove the sample for loading.

[0057] like Figure 4 , Figure 5 and Figure 6 As shown, the drive group 75 includes a rotating shaft 750, a rotating shaft 750 with a vertical axis is fixedly installed on the rotating plate 705, and a telescopic sleeve 751 is rotatably installed between the two electric guide rods through a tripod 753.

[0058] Both ends of the telescopic sleeve 751 and the rotating shaft 750 are fixedly provided with bevel gears 752. The bevel gears 752 on the telescopic sleeve 751 mesh with the bevel gears 752 on the adjacent rotating shaft 750. The front rotating shaft 750 passes through the partition frame 702 and is connected to the output shaft of the motor fixedly installed on the lifting frame 70.

[0059] After determining the sampling reference point at the center of the storage tank, the front sampling tube 700 and the fixing ring 703 are positioned directly above the center of the storage tank, while the rear sampling tube 700 is positioned between the rear inner wall of the storage tank and the front sampling tube 700. The electric guide rod operates, causing the semi-circular ring 704 to move the rear sampling tube 700 backward, bringing it into contact with the rear inner wall of the storage tank. At this point, both sampling tubes 700 have moved to their designated sampling positions: center sampling and near-wall sampling. To ensure smooth near-wall contact of the rear sampling tube 700, the opening of the semi-circular ring 704 faces rearward, allowing the rotating plate 705 and the rear sampling tube 700 to contact the inner wall of the storage tank after movement.

[0060] It should be added that during the rearward movement of the aforementioned rear sampling tube 700, the telescopic sleeve 751 drives its rear bevel gear 752 to move synchronously, maintaining the meshing between the sleeve and the corresponding bevel gear 752.

[0061] After the rear sampling tube 700 moves into position, the lifting cylinder operates, causing the lifting frame 70 to continuously move downwards. The lifting frame 70 drives the two sampling tubes 700 to move downwards synchronously. At the same time, the motor operates, driving the front rotating shaft 750 to rotate. This rotating shaft 750 drives the corresponding bevel gear 752 to rotate synchronously. Through the meshing transmission of the bevel gear 752, the rear rotating shaft 750 rotates synchronously. Therefore, the two rotating shafts 750 drive the corresponding sampling tubes 700 to rotate synchronously through the rotating plate 705. As the sampling tubes 700 continue to move downwards, they also drive the outer flare 72 on them to rotate synchronously. In summary, by using the above-mentioned spiral rotation to enter the slurry and the outer flare 72 to guide the entry first, the cutting rate during the sampling process is reduced, thereby avoiding the reduction of slurry viscosity due to shear thinning characteristics during the sampling process, which would affect the authenticity and reliability of the test data.

[0062] It should be further explained that the flared opening 72, being larger at the top and smaller at the bottom, causes the slurry to slow down and decrease in pressure when entering the sampling tube 700 through the flared opening 72, thereby reducing the shear force. It should also be explained that the sampling tube 700 ensures that the slurry flows evenly and distributes the friction, thereby significantly reducing the shear force on the tube wall and protecting the viscosity of the acetic acid slurry from damage.

[0063] Secondly, multiple equidistant sampling ports 701 set on the same sampling tube 700, in conjunction with the sampling group 73, enable sampling of slurry at different heights within the same location. Simultaneously, by using two sampling tubes 700 at different sampling positions in the storage tank, multiple samplings at different locations and heights are achieved, reducing sampling errors due to non-uniformity and improving the randomness and reliability of the test data. To facilitate the entry of slurry into the sampling tube 700, the sampling ports 701 can be designed with a downward-sloping structure.

[0064] like Figure 7 and Figure 8 As shown, the sampling tube 700 is fixedly provided with spring pieces 76 corresponding to the sampling ports 701. The spring pieces 76 are fixedly provided in the sampling tube 700 at the positions opposite to the corresponding sampling ports 701. In the absence of external interference, the spring pieces 76 cover the corresponding sampling ports 701 in the sampling tube 700 to seal them.

[0065] like Figure 3 , Figure 7 and Figure 8As shown, the sampling group 73 includes a sampling frame 730. Sampling frames 730 are slidably installed on both the left and right sides of the sampling box 1 via electric push rods. A clamping sleeve 731 corresponding to the sampling port 701 is fixedly installed on the right sampling frame 730. A sampling sleeve 732 corresponding to the sampling port 701 is detachably fixedly installed on the left sampling frame 730. The sampling sleeve 732 is connected to the sampling pump 733 fixedly installed at the bottom of the sampling box 1 through a sampling tube. The sampling pump 733 corresponds to the sampling sleeve 732. The sampling pump 733 pumps out the slurry in the corresponding sampling tube and collects it outside the sampling box 1.

[0066] like Figure 7 and Figure 8 As shown, a pin 734 for opening the spring piece 76 is fixedly installed inside the sampling sleeve 732. During the process of the sampling sleeve 732 adhering to the sampling tube 700, the corresponding spring piece 76 is opened by the pin 734, thereby collecting and sampling.

[0067] After sampling is completed by the sampling tube 700, the electric telescopic rod operates to make the bonding plate 74 fit against the upper opening of the sampling tube 700. The lower end of the bonding plate 74 is made of rubber. When the bonding plate 74 fits against the upper end of the sampling tube 700, the sampling tube 700 forms a closed system. The slurry inside has a downward flow tendency under the action of gravity. The outflow of liquid will cause a low-pressure zone to be formed at the upper end. As a result, atmospheric pressure acts on the lower opening. Due to the viscosity of the slurry itself and the action of atmospheric pressure, the slurry will not flow out of the sampling tube 700 at this time. This process has been determined by the art through multiple operations to ensure that the slurry will not flow out after the upper end of the sampling tube 700 is sealed by the bonding plate 74.

[0068] Afterwards, the operating frame 5 moves and resets, thus resetting the two sampling tubes 700 to their initial positions. At this time, the sampling sleeve 732 and the corresponding clamping sleeve 731 are located on the front and rear sides of the corresponding sampling port 701, respectively. The clamping on both sides improves the stability of the sampling tube 700 during sampling. The electric push rod operates so that both the clamping sleeve 731 and the sampling sleeve 732 clamp the sampling tube 700. During this process, the ejector pin 734 pushes open the corresponding spring piece 76, and the spring piece 76 deforms, releasing the sealing effect on the sampling port 701, thus... The sampling sleeve 732 is connected to the sampling tube 700 through the corresponding sampling port 701. It should be noted that the initial positions of the sampling tube 700, the sampling sleeve 732, and the clamping sleeve 731 have all been tested and set by those skilled in the art to ensure that the sampling tube 700 can accurately align with the corresponding sampling port 701 and that the alignment time is short. As a result, the time required for the ejector pin 734 to push open the spring piece 76 is short, and since the slurry itself is viscous, the slurry will not leak out from the sampling port 701 during the alignment process.

[0069] Then, the sampling pump 733 operates to extract the sample from the corresponding position in the sampling tube and collect it outside the sampling box 1, thus completing the sampling process.

[0070] Regarding the sampling process using sampling sleeve 732, it should be noted that the surface of sampling sleeve 732 is made entirely of polytetrafluoroethylene (PTFE) to prevent slurry from adhering to the sampling sleeve 732. This allows the sampling sleeve 732 to be used repeatedly for sampling from two sampling tubes 700, avoiding cross-contamination when sampling from the two tubes 700. To ensure the anti-adhesion effect, sampling sleeve 732 should be replaced periodically.

[0071] The viscosity and concentration values ​​of the extracted cellulose acetate filament slurry samples were measured using a rotational viscosity sensor and a refractive concentration sensor, respectively. The dispersion stability of the samples was measured using a zeta potential sensor.

[0072] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0073] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sampling and testing device for cellulose acetate filament slurry, mounted on a mobile device, characterized in that, include: The sampling box is installed on the mobile device. The lower end of the sampling box has a circular through groove. The inner wall of the lower side of the sampling box is fixedly provided with an annular airbag located above the through groove. The mobile device is provided with a sealing component for sealing the sampling box. The sampling box has operating frames that slide back and forth on both the left and right sides inside. Between the two operating frames, there is a lid opening mechanism and a sampling mechanism for opening the top opening of the storage tank. The sampling mechanism includes a lifting frame, which is slidably mounted between two operating frames. The lifting frame is equipped with two sampling tubes that are radially distributed and spirally arranged along the annular airbag. The lifting frame is also equipped with a reference part that determines the axis of the storage tank by clamping. After the reference part determines the axis of the storage tank, one of the sampling tubes is located at the center of the storage tank, and the other sampling tube is close to the tank wall. The lower end of the sampling tube is provided with an outward flare for controlling shear force; The sampling tube is provided with multiple sampling ports arranged at equal intervals, and the sampling box is provided with a sampling group for taking out the slurry at the required height in the sampling tube. The operating frame is equipped with a drive unit for driving the sampling tube to rotate. The reference part includes an arc-shaped plate. Two arc-shaped plates are arranged in the sampling box, one in front and one behind. The front arc-shaped plate is fixedly set on the sampling box, and the rear arc-shaped plate is fixedly set between the two operating frames. The distance between the rear arc-shaped plate and the front sampling tube matches the radius value of the storage tank. By using multiple sampling ports set on the same sampling tube and coordinating with the sampling group to sample the slurry at different heights within the same location, as well as by using two sampling tubes at different sampling locations in the storage tank, multiple samplings at different locations and heights are carried out in a comprehensive manner.

2. The cellulose acetate filament slurry testing and sampling device according to claim 1, characterized in that: The opening mechanism includes a robotic arm 1 for removing bolts and a robotic arm 2 for negative pressure suction of the end cap. After sealing, the end cap is removed by the robotic arm 1 and grasped by the robotic arm 2. As the operating frame moves forward, the upper end of the storage tank is opened.

3. The cellulose acetate filament slurry testing and sampling device according to claim 1, characterized in that: A partition frame is fixedly installed on the lifting frame. A fixed ring is fixedly installed on the lower end face of the partition frame. A semi-circular ring is fixedly installed on the rear side of the fixed ring through two electric guide rods extending from front to back along two axes. Rotating plates are rotatably installed on both the fixed ring and the semi-circular ring. The sampling tube is fixedly installed on the corresponding rotating plate, and the center line of the thread of the sampling tube is collinear with the center line of the corresponding rotating plate. The diameter of the flared opening gradually decreases from top to bottom along the sampling pipe thread.

4. The cellulose acetate filament slurry testing and sampling device according to claim 3, characterized in that: Both the fixed ring and the semicircular ring are provided with a sealing part, which includes a bonding plate. The bonding plate is slidably installed on both the fixed ring and the semicircular ring via an electric telescopic rod. The bonding plate is attached to the upper opening of the sampling tube to seal the sampling.

5. The cellulose acetate filament slurry testing and sampling device according to claim 3, characterized in that: The drive assembly includes a rotating shaft, a rotating shaft with a vertical axis is fixedly mounted on the rotating plate, and a telescopic sleeve is rotatably mounted between the two electric guide rods via a tripod. Both ends of the telescopic sleeve and the rotating shaft are fixedly equipped with bevel gears. The bevel gears on the telescopic sleeve mesh with the bevel gears on the adjacent rotating shafts. The front rotating shaft passes through the partition frame and is connected to the output shaft of the motor fixedly installed on the lifting frame.

6. The cellulose acetate filament slurry testing and sampling device according to claim 1, characterized in that: The sampling tube is fixedly equipped with springs that correspond one-to-one with the sampling ports.

7. The cellulose acetate filament slurry testing and sampling device according to claim 6, characterized in that: The sampling assembly includes a sampling frame. Sampling frames are installed on both the left and right sides of the sampling box via electric push rods. A clamping sleeve corresponding to each sampling port is fixedly installed on the right sampling frame, and a sampling sleeve corresponding to each sampling port is fixedly installed on the left sampling frame. The sampling sleeve is connected to a sampling pump fixedly installed at the bottom of the sampling box via a sampling tube. The sampling pump pumps the slurry in the corresponding sampling tube and collects it outside the sampling box.

8. The cellulose acetate filament slurry testing and sampling device according to claim 7, characterized in that: The sampling sleeve is fixedly equipped with a push pin for opening the spring sheet.

Images