Method for detecting quality of low-crystallinity polyvinyl alcohol product

Abstract

The invention discloses a low-crystallinity polyvinyl alcohol product quality detection method, and relates to the technical field of polyvinyl alcohol detection. According to the quality detection method for the low-crystallinity polyvinyl alcohol product, through arrangement of the sample mixing barrel, during detection, on one hand, stirring of a sample can be achieved through reciprocating swing of the sample mixing barrel and operation of an internal mixing shaft rod, and then the mixing efficiency and mixing uniformity of the polyvinyl alcohol product and water can be improved; and meanwhile, after detection is completed, automatic discharging of the samples and automatic cleaning operation of the sample mixing barrel can be completed, and the maintenance convenience of the equipment is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of polyvinyl alcohol detection, and specifically to a method for detecting the quality of low-crystallinity polyvinyl alcohol products. Background Technique

[0002] Low-crystallinity polyvinyl alcohol is usually a white solid at room temperature, presenting a flaky, flocculent or powdery form. When preparing, it is necessary to detect the product quality. Referring to the Chinese patent, the "A Polyvinyl Alcohol Powder Viscosity Detection System" with the publication number: "CN216594652U", this patent points out that in the current detection process of polyvinyl alcohol powder viscosity, it is often unable to be carried out quickly. The polyvinyl alcohol powder needs to spend a certain amount of time mixing with water, and during detection, there is often a lack of certain protection and phenomena such as dripping occur; however, this device still has problems of low detection efficiency and poor convenience in equipment maintenance. For this, we propose a method for detecting the quality of low-crystallinity polyvinyl alcohol products to solve the above problems. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a method for detecting the quality of low-crystallinity polyvinyl alcohol products, which solves the problems raised in the above background technique.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A method for detecting the quality of low-crystallinity polyvinyl alcohol products specifically includes the following steps;

[0005] S1. First, observe the color and shape of the polyvinyl alcohol product to determine whether there are obvious impurities inside the polyvinyl alcohol product;

[0006] S2. Mix the polyvinyl alcohol product with water, and use a viscosity detection device to detect the viscosity of the product;

[0007] S3. Detect the polyvinyl alcohol product by high-temperature burning method, heat the polyvinyl alcohol product, control the temperature at 600°C - 800°C, and measure the inorganic residue amount;

[0008] Among them, in S2, the viscosity detection device includes a detection device. Inside the detection device, there is a sample mixing barrel. The outer side of the sample mixing barrel is fixedly sleeved with a positioning ring frame, and a plurality of limiting shaft rods are fixedly installed on the outer side of the positioning ring frame. The limiting shaft rods are rotationally connected to the detection device and are used to drive the sample mixing barrel to reciprocate inside the detection device along the limiting shaft rods to shake and mix the product to be tested;

[0009] A mixing shaft rod is rotationally connected inside the sample mixing barrel. A plurality of mixing blades and a plurality of arc-shaped mixing frames are fixed on the outer side of the mixing shaft rod and are used to stir and mix the product to be tested inside the sample mixing barrel;

[0010] Inside the detection device, a driving cylinder block is fixedly installed. The piston end of the driving cylinder block is connected to a tensile tester. A test rod is fixed below the tensile tester, and a test disc is fixedly installed at the end of the test rod for inserting into the sample mixing barrel to contact the product to be tested, so as to realize viscosity detection.

[0011] Preferably, a driving motor is fixedly installed at the bottom of the sample mixing barrel. The output end of the driving motor is connected to the end of the mixing shaft rod through a coupling, which is used to drive the mixing shaft rod to rotate inside the sample mixing barrel.

[0012] Preferably, an adjusting motor is fixedly installed on the outside of the detection device. The output end of the adjusting motor is connected to the corresponding limiting shaft rod through a coupling, which is used to drive the positioning ring frame and the sample mixing barrel to reciprocate inside the detection device.

[0013] Preferably, a sealing component is provided above the sample mixing barrel, which is used to seal the end of the sample mixing barrel during the mixing process.

[0014] Preferably, the sealing component includes a sealing frame. A fixing plate frame is fixedly installed above the positioning ring frame, and adjusting driving blocks are slidably installed on both sides inside the fixing plate frame. There are two sealing frames, both of which are slidably connected to the fixing plate frame. The sealing frames are fixedly connected to the corresponding adjusting driving blocks. Two adjusting cylinder blocks are fixedly installed on the outside of the fixing plate frame, and the piston end of the adjusting cylinder block is fixedly connected to the corresponding adjusting driving block, which is used to drive the two sealing frames to merge and separate through the adjusting driving blocks.

[0015] Preferably, a plurality of connecting rods are fixedly installed between the fixing plate frame and the positioning ring frame.

[0016] Preferably, an arc-shaped frame is fixedly installed at the bottom of one of the sealing frames, and a plurality of cleaning nozzles are fixedly installed at the bottom of the arc-shaped frame. The cleaning nozzles are used to wash the test disc.

[0017] Preferably, a plurality of the cleaning nozzles are all installed obliquely.

[0018] Preferably, a recycling box body is fixedly installed inside the detection device, which is used to recycle the tested product and cleaning water when the sample mixing barrel rotates to the cleaning angle.

[0019] Preferably, a protective frame is fixedly installed on the outside of the detection device, and a drying module is fixedly installed inside the protective frame.

[0020] The present invention provides a method for detecting the quality of low-crystallinity polyvinyl alcohol products. Compared with the prior art, it has the following beneficial effects:

[0021] (1) The quality detection method for this low-crystallinity polyvinyl alcohol product, through the setting of the sample mixing barrel, during detection, on the one hand, it can achieve the stirring of the sample through the reciprocating swing of the sample mixing barrel and the operation of the internal mixing shaft rod, thereby improving the mixing efficiency and uniformity of the polyvinyl alcohol product and water, ensuring the subsequent detection effect. At the same time, after the detection is completed, it can complete the automatic discharge of the sample and the cleaning operation of the sample mixing barrel, effectively improving the convenience of equipment maintenance.

[0022] (2) The quality detection method for this low-crystallinity polyvinyl alcohol product, through the setting of the blocking component, when the equipment is mixing materials, it can, through the cooperation of the blocking frames on both sides, along with the reciprocating swing of the sample mixing barrel along the limit shaft rod, achieve the sealing treatment of the sample mixing barrel, ensuring the mixing effect of the sample and preventing the sample from splashing out. At the same time, through the cooperation of the recovery box body, it can complete the recovery operation of the sample and the cleaning water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is the Figure 1 schematic side view structure of the present invention;

[0025] Figure 3 is the Figure 2 schematic enlarged structure diagram at A in the present invention;

[0026] Figure 4 is the Figure 1 schematic front view structure of the present invention;

[0027] Figure 5 is the schematic structure diagram of the sample mixing barrel and the blocking frame of the present invention;

[0028] Figure 6 is the Figure 5 schematic sectional view structure of the present invention;

[0029] Figure 7 is the Figure 6 schematic enlarged structure diagram at B in the present invention;

[0030] Figure 8 is the Figure 6 schematic front view structure of the present invention.

[0031] In the figure: 1. Detection device; 2. Driving cylinder block; 3. Tensile tester; 4. Test rod; 401. Test disc; 5. Sample mixing barrel; 501. Driving motor; 6. Positioning ring frame; 601. Limit shaft rod; 7. Adjusting motor; 8. Plugging frame; 9. Fixed plate frame; 901. Connecting rod; 10. Adjusting cylinder block; 11. Adjusting driving block; 12. Mixing shaft rod; 1201. Mixing blades; 1202. Arc-shaped mixing frame; 13. Arc-shaped frame; 1301. Cleaning spray head; 14. Recycling box body; 15. Protective frame; 1501. Drying module. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-8 , the present invention provides two technical solutions, specifically including the following embodiments:

[0034] Embodiment 1:

[0035] A method for detecting the quality of a low-crystallinity polyvinyl alcohol product specifically includes the following steps:

[0036] S1. First, observe the color and shape of the polyvinyl alcohol product to determine whether there are obvious impurities inside the polyvinyl alcohol product;

[0037] S2. Mix the polyvinyl alcohol product with water and detect the viscosity of the product through a viscosity detection device;

[0038] S3. Detect the polyvinyl alcohol product by the high-temperature burning method, heat the polyvinyl alcohol product, control the temperature at 600°C - 800°C, and measure the inorganic residue content;

[0039] Among them, in S2, the viscosity detection device includes a detection device 1. Inside the detection device 1, there is a sample mixing barrel 5. The outer side of the sample mixing barrel 5 is fixedly sleeved with a positioning ring frame 6. And a plurality of limit shaft rods 601 are fixedly installed on the outer side of the positioning ring frame 6. The limit shaft rods 601 are rotationally connected to the detection device 1 and are used to drive the sample mixing barrel 5 to reciprocate inside the detection device 1 along the limit shaft rods 601 to shake and mix the product to be tested;

[0040] In an embodiment of the present invention, specifically, when detecting a polyvinyl alcohol product, first place a sample of the polyvinyl alcohol product into the sample mixing barrel 5, and then add an appropriate amount of water into the sample mixing barrel 5. By reciprocally swinging the sample mixing barrel 5 along the axis of the limiting shaft rod 601, the samples inside the sample mixing barrel 5 can be shaken, so that the polyvinyl alcohol product sample can be uniformly mixed with water;

[0041] In an embodiment of the present invention, specifically, a mixing shaft rod 12 is rotatably connected inside the sample mixing barrel 5, and a plurality of mixing blades 1201 and a plurality of arc-shaped mixing frames 1202 are fixed on the outer side of the mixing shaft rod 12, which are used for stirring and mixing the product to be tested inside the sample mixing barrel 5;

[0042] In an embodiment of the present invention, specifically, during the process of the sample mixing barrel 5 reciprocally swinging along the axis direction of the limiting shaft rod 601, by the operation of the mixing shaft rod 12, a plurality of mixing blades 1201 and a plurality of arc-shaped mixing frames 1202 can be driven to operate, realizing the stirring operation of the sample, further improving the mixing efficiency and mixing uniformity of the polyvinyl alcohol product with water, and ensuring the subsequent detection effect;

[0043] In an embodiment of the present invention, specifically, a driving cylinder 2 is fixedly installed inside the detection device 1. The piston end of the driving cylinder 2 is connected with a tensile force tester 3. A test rod 4 is fixed below the tensile force tester 3, and a test disc 401 is fixedly installed at the end of the test rod 4, which is used to insert into the sample mixing barrel 5 to contact the product to be tested, realizing viscosity detection;

[0044] In an embodiment of the present invention, specifically, during detection, by the operation of the driving cylinder 2, the tensile force tester 3, the test rod 4 and the test disc 401 are driven to move downward until the test disc 401 is immersed in the sample, and then record the tensile force value of the tensile force tester 3 when the driving cylinder 2 moves upward to judge the viscosity of the sample;

[0045] In an embodiment of the present invention, specifically, after the detection is completed, the sample mixing barrel 5 is rotated 90° along the axis direction of the limiting shaft rod 601, so that the detected sample inside can be automatically discharged, improving the maintenance convenience of the equipment;

[0046] In an embodiment of the present invention, specifically, a driving motor 501 is fixedly installed at the bottom of the sample mixing barrel 5. The output end of the driving motor 501 is connected with the end of the mixing shaft rod 12 through a coupling, which is used to drive the mixing shaft rod 12 to rotate inside the sample mixing barrel 5;

[0047] In an embodiment of the present invention, specifically, an adjusting motor 7 is fixedly installed on the outer side of the detection device 1. The output end of the adjusting motor 7 is connected with the corresponding limiting shaft rod 601 through a coupling, which is used to drive the positioning ring frame 6 and the sample mixing barrel 5 to reciprocally operate inside the detection device 1.

[0048] Embodiment 2: Based on Embodiment 1, the viscosity detection device includes a detection device 1. Inside the detection device 1, there is a sample mixing barrel 5. A positioning ring frame 6 is fixedly sleeved outside the sample mixing barrel 5, and a plurality of limiting shaft rods 601 are fixedly installed on the outside of the positioning ring frame 6. The limiting shaft rods 601 are rotatably connected to the detection device 1 and are used to drive the sample mixing barrel 5 to reciprocate inside the detection device 1 along the limiting shaft rods 601 to shake and mix the product to be tested.

[0049] In the embodiment of the present invention, specifically, when detecting a polyvinyl alcohol product, first put a sample of the polyvinyl alcohol product into the sample mixing barrel 5, and then add an appropriate amount of water into the sample mixing barrel 5. By the reciprocating swing of the sample mixing barrel 5 along the axis of the limiting shaft rod 601, the sample inside the sample mixing barrel 5 can be shaken, so that the polyvinyl alcohol product sample can be evenly mixed with water.

[0050] In the embodiment of the present invention, specifically, a mixing shaft rod 12 is rotatably connected inside the sample mixing barrel 5. A plurality of mixing blades 1201 and a plurality of arc-shaped mixing frames 1202 are fixed on the outside of the mixing shaft rod 12 and are used to stir and mix the product to be tested inside the sample mixing barrel 5.

[0051] In the embodiment of the present invention, specifically, during the process of the sample mixing barrel 5 reciprocatingly swinging along the axis of the limiting shaft rod 601, through the operation of the mixing shaft rod 12, a plurality of mixing blades 1201 and a plurality of arc-shaped mixing frames 1202 can be driven to operate, realizing the stirring operation of the sample, further improving the mixing efficiency and mixing uniformity of the polyvinyl alcohol product and water, and ensuring the subsequent detection effect.

[0052] In the embodiment of the present invention, specifically, a driving cylinder body 2 is fixedly installed inside the detection device 1. The piston end of the driving cylinder body 2 is connected to a tensile force tester 3. A test rod 4 is fixed below the tensile force tester 3, and a test disk 401 is fixedly installed at the end of the test rod 4 and is used to insert into the sample mixing barrel 5 to contact the product to be tested to realize viscosity detection.

[0053] In the embodiment of the present invention, specifically, during detection, by the operation of the driving cylinder body 2, the tensile force tester 3, the test rod 4 and the test disk 401 are driven to move downward until the test disk 401 is immersed in the sample, and then the tensile force value of the tensile force tester 3 when the driving cylinder body 2 moves upward is recorded to judge the viscosity of the sample.

[0054] In the embodiment of the present invention, specifically, after the detection is completed, the sample mixing barrel 5 is rotated 90° along the axis of the limiting shaft rod 601, so that the detected sample inside can be automatically discharged, improving the maintenance convenience of the equipment.

[0055] In the embodiment of the present invention, specifically, a driving motor 501 is fixedly installed at the bottom of the sample mixing barrel 5. The output end of the driving motor 501 is connected to the end of the mixing shaft rod 12 through a coupling, which is used to drive the mixing shaft rod 12 to rotate inside the sample mixing barrel 5;

[0056] In the embodiment of the present invention, specifically, an adjusting motor 7 is fixedly installed on the outside of the detection device 1. The output end of the adjusting motor 7 is connected to the corresponding limiting shaft rod 601 through a coupling, which is used to drive the positioning ring frame 6 and the sample mixing barrel 5 to reciprocate inside the detection device 1;

[0057] In the embodiment of the present invention, specifically, a sealing component is provided above the sample mixing barrel 5, which is used to seal the end of the sample mixing barrel 5 during the mixing process;

[0058] In the embodiment of the present invention, specifically, the sealing component includes a sealing frame 8. A fixing plate frame 9 is fixedly installed above the positioning ring frame 6, and adjusting driving blocks 11 are slidably installed on both sides inside the fixing plate frame 9. There are two sealing frames 8, both of which are slidably connected to the fixing plate frame 9. The sealing frame 8 is fixedly connected to the corresponding adjusting driving block 11. Two adjusting cylinder bodies 10 are fixedly installed on the outside of the fixing plate frame 9, and the piston ends of the adjusting cylinder bodies 10 are fixedly connected to the corresponding adjusting driving blocks 11, which are used to drive the two sealing frames 8 to merge and separate through the adjusting driving blocks 11;

[0059] In the embodiment of the present invention, specifically, during the mixing process, by operating the adjusting cylinder body 10, the two sealing frames 8 can be driven to merge through the cooperation of the adjusting driving blocks 11 to seal the sample mixing barrel 5, avoiding the splashing of samples during the mixing process. After the mixing is completed, the adjusting cylinder body 10 is reset to drive the two sealing frames 8 to separate, and then the test plate 401 can be inserted into the sample mixing barrel 5 to realize the detection operation;

[0060] In the embodiment of the present invention, specifically, a plurality of connecting rods 901 are fixedly installed between the fixing plate frame 9 and the positioning ring frame 6;

[0061] In the embodiment of the present invention, specifically, through the arrangement of the connecting rods 901, when the sample mixing barrel 5 and the positioning ring frame 6 rotate along the limiting shaft rod 601, the fixing plate frame 9 and the two sealing frames 8 can be driven to rotate simultaneously;

[0062] In the embodiment of the present invention, specifically, an arc-shaped frame 13 is fixedly installed at the bottom of one of the sealing frames 8, and a plurality of cleaning nozzles 1301 are fixedly installed at the bottom of the arc-shaped frame 13, and the cleaning nozzles 1301 are used to wash the test plate 401;

[0063] In an embodiment of the present invention, specifically, after the detection is completed, as the test plate 401 moves upward and separates from the sample, at this time, by introducing cleaning water into the inside of the arc-shaped frame 13 and then spraying it out by a plurality of cleaning nozzles 1301, the cleaning operation of the test plate 401 can be realized until the test plate 401 moves upward to the initial position. Then, by rotating the sample mixing barrel 5 by 90°, the sample inside can be automatically discharged. During the discharging process, as the cleaning water continuously passes through the cleaning nozzles 1301 and sprays into the inside of the sample mixing barrel 5, and by rotating the mixing shaft rod 12 to drive a plurality of mixing blades 1201 and the arc-shaped mixing frame 1202 to rotate, the cleaning operation of the inside of the sample mixing barrel 5 can be realized, further improving the maintenance convenience of the equipment;

[0064] In an embodiment of the present invention, specifically, specifically, a plurality of cleaning nozzles 1301 are all installed obliquely to ensure the cleaning effect on the test plate 401;

[0065] In an embodiment of the present invention, specifically, specifically, a recovery box body 14 is fixedly installed inside the detection device 1, which is used to recover the tested products and cleaning water when the sample mixing barrel 5 rotates to the cleaning angle. When the sample mixing barrel 5 rotates by 90°, its end can be located directly above the recovery box body 14, thereby realizing the recovery operation of the sample and cleaning water;

[0066] In an embodiment of the present invention, specifically, a protective frame 15 is fixedly installed outside the detection device 1, and a drying module 1501 is fixedly installed inside the protective frame 15. The drying module 1501 is an existing device. After the cleaning is completed, by running the drying module 1501, the inside of the sample mixing barrel 5 can be dried.

[0067] At the same time, the content not detailed in this specification belongs to the well-known prior art of those skilled in the art.

[0068] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the present invention.

Claims

1. A method for detecting the quality of low-crystallinity polyvinyl alcohol products, characterized in that: The specific steps include: S1. First, observe the color and shape of the polyvinyl alcohol product to determine whether the polyvinyl alcohol product contains obvious impurities; S2, mixing the polyvinyl alcohol product with water, and testing the viscosity of the product by using a viscosity testing device; S3. Testing the polyvinyl alcohol product by a high temperature burning method, heating the polyvinyl alcohol product, controlling the temperature at 600° C.-800° C., and determining the inorganic residue; The viscosity detection device in S2 comprises a detection device (1), wherein a sample mixing barrel (5) is provided inside the detection device (1), a positioning ring frame (6) is fixedly sleeved on the outer side of the sample mixing barrel (5), and a plurality of limiting shaft rods (601) are fixedly installed on the outer side of the positioning ring frame (6), and the limiting shaft rods (601) are rotatably connected to the detection device (1) and are used to drive the sample mixing barrel (5) to reciprocate along the limiting shaft rods (601) inside the detection device (1) to shake and mix the product to be tested; A mixing shaft (12) is rotatably connected inside the sample mixing barrel (5), and a plurality of mixing blades (1201) and a plurality of arc-shaped mixing racks (1202) are fixed outside the mixing shaft (12) for stirring and mixing the product to be tested inside the sample mixing barrel (5); A driving cylinder (2) is fixedly installed inside the detection device (1), and a tensile tester (3) is connected to the piston end of the driving cylinder (2). A test rod (4) is fixed below the tensile tester (3), and a test disc (401) is fixedly installed at the end of the test rod (4) for being inserted into the sample mixing barrel (5) to contact with the product to be tested, thereby realizing viscosity detection.

2. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 1, characterized in that: A driving motor (501) is fixedly mounted at the bottom of the sample mixing barrel (5), and an output end of the driving motor (501) is connected to the end of the mixing shaft (12) via a coupling, so as to drive the mixing shaft (12) to rotate inside the sample mixing barrel (5).

3. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 1, characterized in that: An adjusting motor (7) is fixedly mounted on the outside of the detection device (1), and an output end of the adjusting motor (7) is connected to a corresponding limiting shaft (601) via a coupling, so as to drive the positioning ring frame (6) and the sample mixing barrel (5) to reciprocate inside the detection device (1).

4. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 1, characterized in that: A blocking component is provided above the sample mixing barrel (5) for blocking the end of the sample mixing barrel (5) during the mixing process.

5. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 4, characterized in that: The blocking assembly comprises a blocking frame (8), a fixed plate frame (9) is fixedly installed above the positioning ring frame (6), and adjustment drive blocks (11) are slidably installed on both sides of the interior of the fixed plate frame (9), there are two blocking frames (8) and both are slidably connected to the fixed plate frame (9), the blocking frame (8) is fixedly connected to the corresponding adjustment drive block (11), and two adjustment cylinders (10) are fixedly installed on the outer side of the fixed plate frame (9), and the piston ends of the adjustment cylinders (10) are fixedly connected to the corresponding adjustment drive blocks (11) for driving the two blocking frames (8) to merge and separate through the adjustment drive blocks (11).

6. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 5, characterized in that: A plurality of connecting rods (901) are fixedly installed between the fixed plate frame (9) and the positioning ring frame (6).

7. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 5, characterized in that: An arc frame (13) is fixedly mounted on the bottom of the blocking frame (8) on one side, and a plurality of cleaning nozzles (1301) are fixedly mounted on the bottom of the arc frame (13), wherein the cleaning nozzles (1301) are used to flush the test disc (401).

8. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 7, characterized in that: The plurality of cleaning nozzles (1301) are all installed at an angle.

9. A method for detecting the quality of low-crystallinity polyvinyl alcohol products according to claim 1, characterized in that: A recovery box (14) is fixedly installed inside the detection device (1) and is used to recover the tested product and cleaning water when the sample mixing barrel (5) is rotated to a cleaning angle.

10. A method for detecting quality of low-crystallinity polyvinyl alcohol products according to claim 1, characterized in that: A protective frame (15) is fixedly mounted on the outside of the detection device (1), and a drying module (1501) is fixedly mounted on the inside of the protective frame (15).

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