Polyester material reaction kettle sampling device

Abstract

The utility model discloses a polyester material reaction kettle sampling device which comprises a reaction kettle, a square cylinder is fixedly connected to the upper end of the reaction kettle, a sealing plate is rotatably hinged to the lower portion of the square cylinder, a sealing cover is arranged above the square cylinder, the sealing cover is slidably connected with at least one set of extension rods, the lower ends of the extension rods are located in the square cylinder, and the lower ends of the extension rods are located in the square cylinder. The lower end of the extension rod is connected with a sampling barrel, an opening and closing assembly is arranged on the side wall of the square barrel, and the opening and closing assembly can open and close the sealing plate. In the microsphere preparation process, when a polyester material is emulsified, sampling can be carried out at any time, the product quality can be conveniently controlled, and the production efficiency is improved. The particle size distribution of the microspheres is balanced and meets the product quality requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of reaction kettle, specifically relates to a polyester material reaction kettle sampling device. BACKGROUND

[0002] Polylactic acid (PLA) is a polyester, and is prepared from renewable resources (such as plant straw, starch), and has good biocompatibility and biodegradability, so that it has great application value in the fields of biomedical drug loading and knee cartilage repair.

[0003] Through the search, the patent with the publication number CN 222658646 U discloses a preparation device for polylactic acid microspheres, which comprises a reaction kettle body, a reaction kettle cover arranged on the reaction kettle body to cover an upper opening of the reaction kettle body, and a solvent recovery distillation device connected with the reaction kettle cover.

[0004] However, the device still has the following problems in use: when the polyester material is emulsified, the particle size distribution index needs to be observed after polymerization is completed, which is not conducive to quality control during product preparation. UTILITY MODEL CONTENTS

[0005] In order to solve the problems of continuous phase temperature control and long time consumption for membrane tube replacement in the prior art, a polyester material reaction kettle sampling device is provided to solve the problems of continuous phase temperature control and rapid replacement of the membrane tube.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] The utility model provides a polyester material reaction kettle sampling device, which comprises a reaction kettle, the upper end of the reaction kettle is fixedly connected with a square cylinder, the lower side of the square cylinder is rotatably hinged with a sealing plate, the upper side of the square cylinder is provided with a cover, the cover is slidably connected with at least one group of extension rods, the lower end of the extension rod is located in the square cylinder, the lower end of the extension rod is connected with a sampling cylinder, the lateral wall of the square cylinder is provided with an opening and closing assembly, and the opening and closing assembly can open and close the sealing plate.

[0008] Preferably, the lower end of the extension rod is connected with a movable seat, the movable seat is connected with a sampling cylinder, the movable seat is slidably connected with a connecting pin through a first elastic member, and the sampling cylinder is provided with a channel matched with the connecting pin.

[0009] Preferably, the extension rod is provided with an air passage channel, the movable seat is slidably connected with an upper sealing plug through a second elastic member, the sampling cylinder is slidably connected with a lower sealing plug through a third elastic member, and the upper sealing plug and the lower sealing plug are matched to form the air passage channel communicated with the extension rod.

[0010] Preferably, a movable plate is slidably arranged in the sampling cylinder, and a one-way valve capable of controlling sampling is hinged to the lower end of the sampling cylinder.

[0011] Preferably, the opening and closing assembly comprises a pressure plug, the pressure plug is rotationally connected with an adjusting pin, the adjusting pin is threadedly connected with an adjusting plate, the adjusting plate is connected with the square cylinder through a fourth elastic member, and the square cylinder is provided with a pressurizing hole matched with the pressure plug.

[0012] Preferably, a piston is slidably arranged in the square cylinder in the vertical direction, an air flow channel is arranged between the piston and the pressure plug, a rack is arranged below the piston, and the rack is engaged with an intermediate wheel capable of rotating the sealing plate.

[0013] Preferably, the piston is slidably connected with a wedge-shaped block matched with the sampling cylinder through a fifth elastic member, the wedge-shaped block is slidably connected with a telescopic column through a sixth elastic member, and a sliding groove matched with the telescopic column is formed in the wall of the square cylinder.

[0014] Preferably, the cover is slidably connected with a catch matched with the square cylinder through a seventh elastic member.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The upper sealing plug and the lower sealing plug are matched to establish an air passage channel between the sampling cylinder and the extension rod, to form a negative pressure in the sampling cylinder, and to make the one-way valve open, so that the emulsion of the polyester material enters the sampling cylinder, and the one-way valve can be closed under the action of the torsional spring after sampling in the sampling cylinder, thereby avoiding the leakage of the sampling sample from the sampling cylinder.

[0017] 2. The pressure plug and the piston are matched, so that the piston is moved, the sealing plate hinged to the square cylinder is driven to open through the rack, and the reaction kettle and the outside can always be in a disconnected state during sampling.

[0018] 3. By the cooperation of the wedge and the sliding slot, the piston can be reset by the wedge after the sampling of the sampling cylinder is completed, and then the sealing plate is reset, the connecting channel of the reaction kettle and the square cylinder is closed, and the safety of the substances in the reaction kettle is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a three-dimensional structure schematic diagram of the present application;

[0021] Figure 2 is a front view schematic diagram of the sampling part of the present application;

[0022] Figure 3 is a schematic diagram of the internal structure of the sampling part of the present application;

[0023] Figure 4 is a schematic diagram of the internal structure of the present application Figure 3 at A;

[0024] Figure 5 is a schematic diagram of the internal structure of the present application Figure 4 at B-B section;

[0025] Figure 6 is a schematic diagram of the internal structure of the present application Figure 3 at C;

[0026] Figure 7 is a schematic diagram of the sliding slot structure of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1. Reaction kettle; 2. Pin; 3. Square cylinder; 4. Cover; 5. Extension rod; 6. Adjusting pin; 7. Movable seat; 8. Upper sealing plug; 9. Channel; 10. Connecting pin; 11. Lower sealing plug; 12. Sampling cylinder; 13. One-way valve; 14. Movable plate; 15. Pressure plug; 16. Adjusting plate; 17. Piston; 18. Sliding slot; 19. Wedge; 20. Sealing plate; 21. Intermediate wheel; 22. Rack; 23. Telescopic column; 24. Pressing switch; 25. Pressing hole. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0030] Example 1:

[0031] like Figure 1 - Figure 7 As shown in the figure, this embodiment proposes a sampling device for a polyester material reactor, including a reactor 1. A square tube 3 is fixedly connected to the upper end of the reactor 1. The lower part of the square tube 3 extends into the reactor 1. A sealing plate 20 is rotatably hinged to the lower end face of the square tube 3 through a torsion spring. The sealing plate 20 can close the connection channel between the square tube 3 and the reactor 1, so that the chemical reaction in the reactor 1 can proceed safely. At the same time, it can also maintain the pressure during the polymerization reaction in the reactor 1.

[0032] A cover 4 is provided on the top of the square tube 3. The cover 4 is slidably connected to a locking pin 2 that can cooperate with the square tube 3 through a seventh elastic element. The seventh elastic element is a seventh spring. One end of the seventh spring is connected to the locking pin 2, and the other end of the seventh spring is connected to the cover 4. The locking pin 2 is placed horizontally. A blind hole is provided on the square tube 3 to cooperate with the locking pin 2. The locking pin 2 can slide into the blind hole to realize the combination of the cover 4 and the square tube 3. By reversing the operation and pulling the locking pin 2 outward, the cover 4 can be separated from the square tube 3.

[0033] Furthermore, to achieve better sealing, a sealing gasket is provided in the contact area between the sealing plate 4 and the upper end face of the square tube 3.

[0034] A movable seat 7 is placed concentrically on the cover 4. The movable seat 7 is located inside the square tube 3. At least one set of extension rods 5 are threadedly connected to the upper part of the movable seat 7. The upper end of the extension rods 5 extends out of the cover 4 and the extension rods 5 can slide relative to the cover 4.

[0035] Furthermore, to achieve better sealing, a sealing ring is provided in the contact area between the sealing plate 4 and the extension rod 5.

[0036] A connecting pin 10 is slidably connected to the lower part of the movable seat 7 via a first elastic element, which is a first spring. One end of the first spring is connected to the connecting pin 10, and the other end of the first spring is connected to the movable seat 7. The movable seat 7 is connected to a sampling cylinder 12. The sampling cylinder 12 is provided with a channel 9 that cooperates with the connecting pin 10. Under the action of the first spring, the connecting pin 10 is engaged in the channel 9, thus completing the connection between the sampling cylinder 12 and the movable seat 7. When removing it, a tool is inserted into the channel 9 to force the connecting pin 10 to compress the first spring, thereby disengaging the connecting pin 10 from the channel 9 and completing the removal of the sampling cylinder 12.

[0037] Furthermore, to prevent substances in the reactor 1 from flowing into the channel 9 during sampling, an auxiliary plug is provided in the channel 9 to block the channel 9 during sampling.

[0038] Furthermore, to better achieve sampling and avoid spillage when removing the sampling bottle 12, the extension rod 5 is provided with an air passage, and the movable seat 7 is slidably connected to the upper sealing plug 8 through the second elastic element. The second elastic element is a second spring, one end of which is connected to the upper sealing plug 8, and the other end of which is connected to the movable seat 7. The movable seat 7 is provided with an air passage that cooperates with the upper sealing plug 8.

[0039] The sampling cylinder 12 is slidably connected to the lower sealing plug 11 via a third elastic element. The third elastic element is a third spring. One end of the third spring is connected to the lower sealing plug 11, and the other end of the second spring is connected to the sampling cylinder 12. The upper sealing plug 8 and the lower sealing plug 11 cooperate to form an air passage that is connected to the extension rod 5.

[0040] Specifically, such as Figure 3 , Figure 6 As shown, when the sampling cylinder 12 is fixed to the movable seat 7 through the channel 9 and the connecting pin 10, the elastic force of the third spring is greater than that of the second spring. The lower sealing plug 11 first lifts the upper sealing plug 8, so that the air passage of the movable seat 7 is opened. When the upper sealing plug 8 is in place, the upper sealing plug 8 forces the lower sealing plug 11 to move downward, so that the air passage of the sampling cylinder 12 is opened, and finally the extension rod 5 is connected to the air passage of the sampling cylinder 12.

[0041] Specifically, a movable plate 14 is slidably placed inside the sampling cylinder 12, and a sampling channel is opened at the lower end of the sampling cylinder 12. The sampling channel is hinged to a one-way valve 13 by a torsion spring. When a negative pressure is generated in the cavity of the sampling cylinder 12, the one-way valve 13 can rotate towards the cavity of the sampling cylinder 12 under the pressure difference between the high pressure in the reactor 1 and the negative pressure in the cavity of the sampling cylinder 12, pushing the movable plate 14 to move upward, so that the polyester material emulsion in the reactor can smoothly enter the sampling cylinder 12.

[0042] Furthermore, the air passage of the extension rod 5 is connected to a vacuum pump via a pipe. The vacuum pump is a mature product on the market and is not shown. When the vacuum pump is working, it can extract the gas in the air passage of the extension rod 5, and then extract the gas in the sampling cylinder 12, so that a negative pressure is formed inside the sampling cylinder 12.

[0043] Specifically, when the sampling cylinder 12 finishes sampling, the movable plate 14 moves upward to the top, which can prevent the sample from entering the gas passage of the sampling cylinder 12. At this time, the air pump resistance increases, and the sampling can be completed by stopping the air pump. At this time, the pressure inside the sampling cylinder 12 is consistent with the pressure inside the reaction vessel 1, and the one-way valve 13 is reset under the action of the torsion spring, closing the sampling channel.

[0044] Furthermore, to better achieve sampling, a press switch 24 is fixed to the gripping end of the extension rod 5. The press switch 24 is a mature product on the market and is connected to a power source. It is also connected to the air pump via a wire. The extension rod 5 is a standard rod and is equipped with scale lines. During sampling, at least one extension rod 5 is connected according to the sampling depth to ensure that the required sampling depth can be successfully completed.

[0045] A pressure port 25 is provided on the side wall of the square tube 3. The pressure port 25 is connected to a gas source station via a pipeline. The gas source station is a mature product on the market and is not shown in the figure. The gas source station can adjust accordingly according to the pressure inside the reactor 1. When it reaches the same pressure as the reactor 1, it automatically stops and maintains pressure. The pressure port 25 is equipped with a ball valve that can establish on / off connection with the gas source station. The ball valve is a mature product on the market. The side wall of the square tube 3 is also equipped with an opening and closing assembly that can open and close the sealing plate 20. The opening and closing assembly includes a pressure plug 15, which is rotatably connected to an adjusting pin 6. The adjusting pin 6 is threadedly connected to an adjustment mechanism. Plate 16 and adjusting plate 16 are connected to square tube 3 through a fourth elastic element, which is a fourth spring. One end of the fourth spring is connected to square tube 3, and the other end of the fourth spring is connected to adjusting plate 16. A piston 17 is slidably arranged in the vertical direction of square tube 3. An airflow channel is provided between piston 17 and pressure plug 15. This airflow channel enables piston 17 to establish communication with the internal cavity of square tube 3. A rack 22 is provided below piston 17. The rack 22 meshes with an intermediate wheel 21 that enables sealing plate 20 to rotate. The intermediate wheel 21 is located in the middle position between sealing plate 20 and rack 22.

[0046] Specifically, based on the pressure required for the polymerization reaction in reactor 1, the position of the adjusting plate 16 is adjusted by rotating the adjusting pin 6, thereby compressing and adjusting the fourth spring, and thus adjusting the pressure intensity of the pressure plug 15. The gas source station pressurizes the square cylinder 3 through the pressurizing hole 25. When the pressure reaches the same level as that in reactor 1, the pressurization continues, forcing the pressure plug 15 to compress the fourth spring and move outward, opening the airflow channel. This allows the gas in the square cylinder 3 to force the piston 17 to move downward through the airflow channel, which in turn causes the rack 22 to move downward. This opens the sealing plate 20 through the intermediate wheel 21. At this time, the gas source station connected to the pressurizing hole 25 stops working and maintains pressure.

[0047] The piston 17 is slidably connected to a wedge block 19 that cooperates with the sampling cylinder 12 via a fifth elastic element. The fifth elastic element is a fifth spring, one end of which is connected to the wedge block 19 and the other end of which is connected to the piston 17. The wedge block 19 is slidably connected to a telescopic column 23 via a sixth elastic element. The sixth elastic element is a sixth spring, one end of which is connected to the telescopic column 23 and the other end of which is connected to the wedge block 19. A groove 18 that cooperates with the telescopic column 23 is provided on the wall of the square cylinder 3. The wedge block 19 can slide up and down relative to the square cylinder 3.

[0048] Specifically, such as Figure 3 , Figure 4 , Figure 5 , Figure 7 As shown, the chute 18 consists of a vertical section ①, a curved section ②, and an inclined section ③. At the junction of the vertical section ① and the curved section ②, the bottom of the curved section ② is lower than the bottom of the vertical section ①. At the junction of the curved section ② and the inclined section ③, the bottom of the inclined section ③ is lower than the bottom of the curved section ②. At the junction of the inclined section ③ and the vertical section ①, the bottom of the vertical section ① is lower than the bottom of the inclined section ③.

[0049] Specifically, when the sealing plate 20 is opened, the piston 17 moves downward, causing the wedge block 19 to move downward, so that the telescopic column 23 slides in the vertical section ① and the curved section ② of the slide groove 18 under the cooperation of the sixth spring. When the sealing plate 20 is fully opened, the piston 17 moves downward into place and remains stationary. At this time, the sampling cylinder 12 moves into the reactor 1 through the extension rod 5. The sampling cylinder 12 presses the wedge block 19 to compress the fifth spring to avoid it. After the sampling cylinder 12 passes the wedge block 19, it resets under the action of the fifth spring.

[0050] Specifically, after the sampling cylinder 12 completes sampling, it is pulled upward. After the sampling cylinder 12 contacts the wedge block 19, the wedge block 19 moves upward, causing the telescopic column 23 to slide within the curved section ② and inclined section ③ of the slide groove 18 under the cooperation of the sixth spring. This drives the wedge block 19 to move upward along the curved section ② of the slide groove 18 and gradually slide towards the inclined section ③ of the slide groove 18. At this time, the wedge block 19 gradually compresses the fifth spring. When it moves to the inclined section ③ of the slide groove 18, the wedge block 19 disengages from the sampling cylinder 12, and the sampling cylinder 12 is lifted upward. At this time, the wedge block 19 resets along the inclined section ③ of the slide groove 18 under the action of the fifth spring.

[0051] Furthermore, during the upward reset process of the wedge block 19, the piston 17 is driven to move upward, at which time the rack 22 moves upward, thereby resetting the sealing plate 20 and separating the square tube 3 from the reactor 1.

[0052] Furthermore, when the cap 4 is removed, the sampling cylinder 12 can be moved out of the square cylinder 3 together. At this time, the pressure inside the square cylinder 3 decreases, and under the action of the fourth spring, the pressure plug 15 is reset. At the same time, the pressure inside the reactor 1 further strengthens the sealing fit between the sealing plate 20 and the square cylinder 3, thus avoiding affecting the chemical reaction inside the reactor 1.

[0053] Furthermore, after the cap 4 is removed, the sampling cylinder 12 is separated from the movable seat 7 through the channel 9. During separation, the lower sealing plug 11 is reset first under the action of the third spring, thereby sealing the sampling cylinder 12.

[0054] Furthermore, after sampling is completed, the top of the square tube 3 is sealed to prevent debris from entering the square tube 3.

[0055] Furthermore, to ensure better sampling and avoid affecting the reaction of substances in reactor 1, nitrogen is used as the gas supply station, and nitrogen is also used to fill the sampling cylinder 12.

[0056] Working principle and usage process of this utility model:

[0057] S1: Fix the sampling cylinder 12 to the movable seat 7 with the connecting pin 10, so that the upper sealing plug 8 and the lower sealing plug 11 are separated, thereby connecting the movable seat 7 with the air passage of the sampling cylinder 12. Then fix the sealing plate 4 above the square cylinder 3 with the locking pin 2. Connect the appropriate extension rod 5 according to the sampling depth. The uppermost extension rod 5 is connected to the air pump and the press switch 24.

[0058] S2: The gas source station pressurizes the square cylinder 3 through the pressurization hole, causing the pressure plug 15 to move outward, thereby opening the airflow channel between the piston 17 and the square cylinder 3. The air pressure causes the piston 17 to move downward, thereby opening the sealing plate 20 through the rack 22.

[0059] At the same time, piston 17 drives wedge block 19 to move downward along slide groove 18.

[0060] S3: Move the extension rod 5 downwards to move the sampling cylinder 12 downwards. After the sampling cylinder 12 passes the wedge block 19, it continues to move to the specified depth.

[0061] S4: Pressing switch 24 activates the vacuum pump, extracting gas from sampling cylinder 12. At this time, the pressure inside sampling cylinder 12 is lower than the pressure inside reactor 1. The sample forces one-way valve 13 to rotate into sampling cylinder 12 and pushes movable plate 14 upward, allowing the sample from reactor 1 to enter sampling cylinder 12.

[0062] S5: When the sample enters the sampling cylinder 12, it continuously pushes the movable plate 14 upward. When the sample fills the sampling cylinder 12, the movable plate 14 blocks the air passage of the sampling cylinder 12, and the air pump stops working by pressing the switch 24.

[0063] S6: Pull the sampling cylinder 12 upward. When the sampling cylinder 12 contacts the wedge block 19, it drives the wedge block 19 to reset along the slide groove 18. Under the action of the slide groove 18, the sampling cylinder 12 passes over the wedge block 19.

[0064] At the same time, the wedge block 19 drives the piston 17 to reset under the action of the fifth spring, thereby resetting the sealing plate 20 and separating the square tube 3 from the reaction vessel 1.

[0065] S7: Remove the cap 4. The air pressure inside the square tube 3 drops. The pressure plug 15 resets under the action of the fourth spring. Then reseal the top of the square tube 3 to prevent foreign objects from entering.

[0066] S8: The sampling cylinder 12 is removed through channel 9. When it is removed, the lower sealing plug 11 is reset first under the action of the third spring, thus completing the sealing of the sampling cylinder 12.

[0067] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sampling device for a polyester material reaction vessel, comprising a reaction vessel (1), characterized in that: The upper end of the reactor (1) is fixedly connected to a square tube (3), and a sealing plate (20) is rotatably hinged to the lower part of the square tube (3). A cover (4) is provided on the upper part of the square tube (3), and at least one set of extension rods (5) is slidably connected to the cover (4). The lower end of the extension rod (5) is located inside the square tube (3), and a sampling tube (12) is connected to the lower end of the extension rod (5). An opening and closing assembly is provided on the side wall of the square tube (3), and the opening and closing assembly can open and close the sealing plate (20).

2. The sampling device for the polyester material reactor according to claim 1, characterized in that: The lower end of the extension rod (5) is connected to a movable seat (7), the movable seat (7) is connected to a sampling cylinder (12), the movable seat (7) is slidably connected to a connecting pin (10) through a first elastic element, and the sampling cylinder (12) is provided with a channel (9) that cooperates with the connecting pin (10).

3. The sampling device for the polyester material reactor according to claim 2, characterized in that: The extension rod (5) is provided with an air passage, the movable seat (7) is slidably connected to an upper sealing plug (8) through a second elastic element, and the sampling cylinder (12) is slidably connected to a lower sealing plug (11) through a third elastic element. The upper sealing plug (8) and the lower sealing plug (11) cooperate to form an air passage that communicates with the extension rod (5).

4. The sampling device for the polyester material reactor according to claim 3, characterized in that: A movable plate (14) is slidably placed inside the sampling tube (12), and a one-way valve (13) that can control sampling is hinged to the lower end of the sampling tube (12).

5. The sampling device for the polyester material reactor according to claim 1, characterized in that: The opening and closing assembly includes a pressure plug (15), which is rotatably connected to an adjusting pin (6). The adjusting pin (6) is threadedly connected to an adjusting plate (16). The adjusting plate (16) is connected to the square tube (3) through a fourth elastic element. The square tube (3) has a pressure hole (25) that can cooperate with the pressure plug (15).

6. The sampling device for the polyester material reactor according to claim 5, characterized in that: The square tube (3) is vertically slidably provided with a piston (17), and an airflow channel is provided between the piston (17) and the pressure plug (15). A rack (22) is provided below the piston (17), and the rack (22) meshes with an intermediate wheel (21) that enables the sealing plate (20) to rotate.

7. The sampling device for the polyester material reactor according to claim 6, characterized in that: The piston (17) is slidably connected to a wedge block (19) that cooperates with the sampling cylinder (12) via a fifth elastic element. The wedge block (19) is slidably connected to a telescopic column (23) via a sixth elastic element. The square cylinder (3) has a groove (18) on its wall that cooperates with the telescopic column (23).

8. The sampling device for the polyester material reactor according to claim 1, characterized in that: The cover (4) is slidably connected to a locking pin (2) that can cooperate with the square tube (3) via a seventh elastic element.

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