An on-line monitoring device for POY finish

Abstract

The present invention relates to the technical field of monitoring devices, and specifically to an on-line monitoring device for POY sizing agent, which includes a machine head, a guide rod connected to the bottom of the machine head, tuning forks symmetrically connected to the bottom of the guide rod, and a flange plate sleeved outside the guide rod. The lower end of the flange plate is connected with a connecting pipe through a flange, and both tuning forks are located inside the installation pipe. This tuning fork densitometer can not only on-line and real-time monitor the density of the POY sizing agent in the production pipeline, but also the dirt adhered to the two tuning forks at the bottom of the tuning fork densitometer can be cleaned without disassembling the tuning fork densitometer, and there is no need to additionally design a flushing system to flush the two tuning forks. It is not only convenient to operate, but also no water will be mixed into the POY sizing agent in the production process, which brings convenience. The two scraping rods and two scraping blocks for cleaning the two tuning forks can adapt to the positions of the two tuning forks relative to the tuning fork densitometer for comprehensive cleaning, and the cleaning effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring devices, and particularly to an on-line monitoring device for POY finish. Background Art

[0002] POY finish is a textile finish used in the production process of polyester pre-oriented yarn. The production of POY finish is a continuous process, and it is necessary to understand the density of the finish in real time. A tuning fork densitometer is installed on the production line of POY finish to continuously monitor the density of the finish in real time. Once the density is abnormal, it can alarm in time, enabling the operator to quickly take measures to adjust and avoid the production of a large number of unqualified products due to density deviation.

[0003] The tuning fork densitometer mainly consists of a head, a guide rod and two tuning forks. The two tuning forks are the main components for monitoring the density of POY finish, and the two tuning forks will be in direct contact with the POY finish in the production pipeline. POY finish is a mixture composed of various chemical substances, including surfactants, antistatic agents, lubricants, etc. As the two tuning forks are in contact with the POY finish for a long time, some components will precipitate from the finish due to changes in conditions such as temperature and pressure. For example, some surfactants will form crystals at lower temperatures, and these crystals will gradually deposit on the surface of the tuning forks, forming scale, which will further affect the monitoring effect of the tuning fork densitometer on POY finish.

[0004] However, the two tuning forks of the tuning fork densitometer are inside the production pipeline, and it is necessary to disassemble the tuning fork densitometer or design an additional flushing system to clean the two tuning forks. Disassembling the tuning fork densitometer is rather cumbersome, and designing an additional flushing system is likely to let the POY finish in the production pipeline come into contact with water during the production process, directly affecting the density of POY finish and causing many inconveniences. For this reason, we propose an on-line monitoring device for POY finish. Summary of the Invention

[0005] The purpose of the present invention is to provide an on-line monitoring device for POY finish to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: An on-line monitoring device for POY finish, comprising a machine head, a guide rod connected to the bottom of the machine head, tuning forks symmetrically connected to the bottom of the guide rod, and a flange sleeve outside the guide rod. The lower end of the flange is connected with a connecting pipe through a flange. The lower end of the connecting pipe communicates with an installation pipe. The guide rod passes through the connecting pipe. Both tuning forks are located inside the installation pipe. A collar is slidably sleeved on the upper edge of the outer wall of the guide rod. Connecting rods are arranged on the front and rear sides of the collar, and connecting plates are arranged on both sides of the collar. An elastic connection mechanism is provided between the two connecting rods, the two connecting plates and the collar. A lifting mechanism is provided between the collar and the installation pipe. The two connecting rods and the two connecting plates are slidably arranged in the inner wall of the flange. The lower ends of the two connecting rods are fixedly connected with scraping rods, and the lower ends of the two connecting plates are fixedly connected with scraping blocks. A sealing mechanism is provided between the connecting pipe and the flange.

[0007] Preferably, the elastic connection mechanism includes two concave rods and two concave plates. The two concave rods are respectively fixedly connected to the front and rear parts of the outer wall of the collar. The two concave plates are respectively fixedly connected to the two sides of the outer wall of the collar. The inner sides of the two concave rods are respectively slidably matched with the two connecting rods. The inner sides of the two concave plates are respectively slidably matched with the two connecting plates. A limiting component is provided on the two concave rods and the two concave plates.

[0008] Preferably, the elastic connection mechanism further includes four support columns. One ends of the four support columns are all fixedly connected to the outer wall of the collar. The other ends of two of the support columns are respectively fixedly connected to the inner sides of the two concave rods away from the collar. The other ends of the other two support columns are respectively fixedly connected to the inner sides of the two concave plates away from the collar. Springs II are fixedly connected between the walls of the two connecting rods away from the collar and the inner sides of the two concave rods respectively, and between the walls of the two connecting plates away from the collar and the inner sides of the two concave plates respectively. The four springs II are respectively slidably sleeved on the outer walls of the four support columns. The four support columns respectively pass through the two connecting rods and the two connecting plates movably.

[0009] Preferably, the limiting component includes four L-shaped plates. One end of two of the L-shaped plates is fixedly connected to the side walls of two concave rods respectively, and one end of the other two L-shaped plates is fixedly connected to the rear ends of two concave plates respectively. Guide columns are slidably inserted through the vertical parts of the four L-shaped plates. One end of each of the four guide columns is fixedly connected with a triangular block. Spring threes are fixedly connected between the four triangular blocks and the four L-shaped plates respectively. The four spring threes are respectively slidably sleeved on the outer walls of the four guide columns. One vertical surface of two of the triangular blocks is respectively in contact with the upper edge of the wall surface of the corresponding collar of two connecting rods, and one vertical surface of the other two triangular blocks is respectively in contact with the upper edge of the wall surface of the corresponding collar of two connecting plates. A linkage assembly is provided between the four triangular blocks and the flange plate.

[0010] Preferably, the linkage assembly includes four L-shaped rods and four fixing plates. One end of each of the four L-shaped rods is fixedly connected to the upper ends of the four triangular blocks respectively. The four fixing plates are evenly distributed and fixedly connected to the upper end of the flange plate. Spherical convex blocks are fixedly connected to the upper edge of the outer wall of each of the four fixing plates. The four spherical convex blocks are respectively on the movement paths of the other ends of the four L-shaped rods.

[0011] Preferably, the lifting mechanism includes a support plate. The support plate is fixedly connected to the outer wall of the installation pipe. An electric push rod is fixedly installed at the upper end of the support plate. The telescopic shaft end of the electric push rod is fixedly connected to a connecting frame. The end of the connecting frame away from the electric push rod is fixedly connected to the outer wall of the collar.

[0012] Preferably, the sealing mechanism includes a sealing ring. The sealing ring is located below the scraping rod and the scraping block. The sealing ring is slidably sleeved on the outer wall of the guide rod. The outer ring surface of the sealing ring is in contact with the inner wall of the connecting pipe. A plurality of evenly distributed arc-shaped blocks are arranged in a fitting manner at the upper edge of the sealing ring. The plurality of arc-shaped blocks are all fixedly connected to the inner wall of the connecting pipe. A plurality of evenly distributed connecting columns are fixedly connected to the upper end of the sealing ring near the edge. The plurality of connecting columns all movably penetrate through the upper end of the flange plate. Disks are fixedly connected to the upper ends of the plurality of connecting columns. Spring ones are fixedly connected between the lower ends of the plurality of disks and the flange plate respectively. The plurality of spring ones are respectively slidably sleeved on the outer walls of the plurality of connecting columns.

[0013] Preferably, chute twos are respectively opened at the upper end of the flange plate corresponding to the two connecting rods, and chute ones are respectively opened at the upper end of the flange plate corresponding to the two connecting plates. The two chute twos are respectively in sliding fit with the two connecting rods, and the two chute ones are respectively in sliding fit with the two connecting plates.

[0014] Preferably, splicing pipes are communicated with the front and rear parts of the outer wall of the connecting pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. Through the mutual cooperation of the connecting pipe, installation pipe, collar, connecting rod, connecting plate, elastic connection mechanism, limiting component, linkage component, lifting mechanism, scraping rod, scraping block and sealing mechanism, this tuning fork densitometer can not only monitor the density of POY sizing agent in the production pipeline online in real time, but also clean the dirt adhered to the two tuning forks at the bottom of the tuning fork densitometer without disassembling the tuning fork densitometer, and there is no need to design an additional flushing system to flush the two tuning forks. It is not only convenient to operate, but also no water will mix into the POY sizing agent in the production process, bringing convenience.

[0017] 2. At the same time, the two scraping rods and two scraping blocks for cleaning the two tuning forks can adaptively and comprehensively clean by first moving down and then moving closer to the tuning forks to adapt to the positions of the two tuning forks relative to the tuning fork densitometer. The cleaning effect is good. The two scraping rods and two scraping blocks are also convenient for self-cleaning and convenient for normal use next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the flange, connecting pipe, installation pipe and splicing pipe of the present invention;

[0020] Figure 3 is of the present invention Figure 1 The enlarged view of the structure at A in;

[0021] Figure 4 is a cross-sectional view of the flange of the present invention and one of the concave rods;

[0022] Figure 5 is of the present invention Figure 4 The enlarged view of the structure at B in;

[0023] Figure 6 is of the present invention Figure 4 The enlarged view of the structure at C in;

[0024] Figure 7 is a side plane cross-sectional view of the flange, connecting pipe, installation pipe and splicing pipe of the present invention;

[0025] Figure 8 is a partial structural schematic diagram between the collar, scraping block and scraping rod of the present invention.

[0026] In the attached drawings, the list of components represented by each reference numeral is as follows: 1. Guide rod; 2. Connecting frame; 3. Flange; 4. Electric push rod; 5. Support plate; 6. Connecting pipe; 7. Installation pipe; 8. Splicing pipe; 9. Machine head; 10. Concave plate; 11. Collar; 12. Concave rod; 13. Connecting rod; 14. Scraping rod; 15. Scraping block; 16. Tuning fork; 17. Sealing ring; 18. Arc-shaped block; 19. Connecting column; 20. Connecting plate; 21. Disc; 22. L-shaped rod; 23. Spherical convex block; 24. Fixed plate; 25. First spring; 26. L-shaped plate; 27. Triangular block; 28. First chute; 29. Second chute; 30. Guide post; 31. Second spring; 32. Support column; 33. Third spring. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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.

[0028] The present invention provides a technical solution: as Figure 1 - Figure 8 shown, a POY oil agent on-line monitoring device includes a machine head 9, a guide rod 1 connected to the bottom of the machine head 9, tuning forks 16 symmetrically connected to the bottom of the guide rod 1, and a flange 3 sleeved outside the guide rod 1. The lower end of the flange 3 is connected with a connecting pipe 6 through a flange. The lower end of the connecting pipe 6 communicates with an installation pipe 7. The guide rod 1 passes through the connecting pipe 6. Both tuning forks 16 are located inside the installation pipe 7. A collar 11 is slidably sleeved on the upper edge of the outer wall of the guide rod 1. Connecting rods 13 are arranged on the front and rear sides of the collar 11, and connecting plates 20 are arranged on both sides of the collar 11. An elastic connection mechanism is provided between the two connecting rods 13, the two connecting plates 20 and the collar 11. A lifting mechanism is provided between the collar 11 and the installation pipe 7. The two connecting rods 13 and the two connecting plates 20 are slidably arranged in the inner wall of the flange 3. The lower ends of the two connecting rods 13 are fixedly connected with scraping rods 14, and the lower ends of the two connecting plates 20 are fixedly connected with scraping blocks 15. A sealing mechanism is provided between the connecting pipe 6 and the flange 3.

[0029] The elastic connection mechanism includes two concave rods 12 and two concave plates 10. The two concave rods 12 are respectively fixedly connected to the front and rear parts of the outer wall of the collar 11, and the two concave plates 10 are respectively fixedly connected to the two sides of the outer wall of the collar 11. The inner sides of the two concave rods 12 are respectively slidably matched with the two connecting rods 13, and the inner sides of the two concave plates 10 are respectively slidably matched with the two connecting plates 20. Limiting components are provided on the two concave rods 12 and the two concave plates 10.

[0030] The elastic connection mechanism further includes four struts 32. One end of each of the four struts 32 is fixedly connected to the outer wall of the collar 11. The other ends of two of the four struts 32 are respectively fixedly connected to the inner sides of two concave rods 12 away from the collar 11. The other ends of the other two struts 32 are respectively fixedly connected to the inner sides of two concave plates 10 away from the collar 11. Springs two 31 are fixedly connected between the walls of the two connecting rods 13 away from the collar 11 and the inner sides of the two concave rods 12, and between the walls of the two connecting plates 20 away from the collar 11 and the inner sides of the two concave plates 10. The four springs two 31 are respectively slidably sleeved on the outer walls of the four struts 32, and the four struts 32 respectively pass through the two connecting rods 13 and the two connecting plates 20 movably.

[0031] The limiting assembly includes four L-shaped plates 26. One end of two of the four L-shaped plates 26 is respectively fixedly connected to the side walls of the two concave rods 12. One end of the other two L-shaped plates 26 is respectively fixedly connected to the rear ends of the two concave plates 10. Guide posts 30 are slidably inserted through the vertical parts of the four L-shaped plates 26. One end of each of the four guide posts 30 is fixedly connected with a triangular block 27. Springs three 33 are fixedly connected between the four triangular blocks 27 and the four L-shaped plates 26 respectively. The four springs three 33 are respectively slidably sleeved on the outer walls of the four guide posts 30. One vertical surface of two of the four triangular blocks 27 is respectively in contact with the upper edge of the wall of the two connecting rods 13 corresponding to the collar 11, and one vertical surface of the other two triangular blocks 27 is respectively in contact with the upper edge of the wall of the two connecting plates 20 corresponding to the collar 11. A linkage assembly is provided between the four triangular blocks 27 and the flange 3.

[0032] The linkage assembly includes four L-shaped rods 22 and four fixing plates 24. One end of each of the four L-shaped rods 22 is respectively fixedly connected to the upper ends of the four triangular blocks 27. The four fixing plates 24 are evenly distributed and fixedly connected to the upper end of the flange 3. Spherical convex blocks 23 are fixedly connected to the upper edge of the outer walls of the four fixing plates 24. The four spherical convex blocks 23 are respectively on the movement paths of the other ends of the four L-shaped rods 22.

[0033] The lifting mechanism includes a support plate 5. The support plate 5 is fixedly connected to the outer wall of the mounting tube 7. An electric push rod 4 is fixedly installed at the upper end of the support plate 5. The telescopic shaft end of the electric push rod 4 is fixedly connected with a connecting frame 2. One end of the connecting frame 2 away from the electric push rod 4 is fixedly connected to the outer wall of the collar 11.

[0034] The sealing mechanism includes a sealing ring 17. The sealing ring 17 is located below the scraping rod 14 and the scraping block 15. The sealing ring 17 is slidably sleeved on the outer wall of the guide rod 1. The outer ring surface of the sealing ring 17 is in contact with the inner wall of the connecting pipe 6. At the upper edge of the sealing ring 17, a plurality of evenly distributed arc-shaped blocks 18 are arranged in a fitting manner. The plurality of arc-shaped blocks 18 are all fixedly connected to the inner wall of the connecting pipe 6. At the upper part near the edge of the sealing ring 17, a plurality of evenly distributed connecting columns 19 are fixedly connected. The plurality of connecting columns 19 all pass through the upper end of the flange 3 movably. At the upper ends of the plurality of connecting columns 19, discs 21 are fixedly connected. Between the lower ends of the plurality of discs 21 and the flange 3, first springs 25 are fixedly connected. The plurality of first springs 25 are respectively slidably sleeved on the outer walls of the plurality of connecting columns 19.

[0035] At the upper end of the flange 3, second chutes 29 are respectively opened corresponding to the two connecting rods 13. At the upper end of the flange 3, first chutes 28 are respectively opened corresponding to the two connecting plates 20. The two second chutes 29 are respectively in sliding fit with the two connecting rods 13. The two first chutes 28 are respectively in sliding fit with the two connecting plates 20.

[0036] Splicing pipes 8 are communicated with both the front and rear parts of the outer wall of the connecting pipe 6.

[0037] Working principle: First, install the installation pipe 7 on the production and transportation pipeline of POY sizing agent. Then, combined with Figure 2 it can be seen that the POY sizing agent will continuously pass through the two tuning forks 16, and the real-time density data of the POY sizing agent can be detected on the machine head 9. This is a well-known prior art and will not be elaborated here. The sealing ring 17 is closely attached to the inside of the connecting pipe 6, and due to the limitation of the plurality of arc-shaped blocks 18 at its upper end, it will not be driven to move upward by the pressure of the POY sizing agent, which can prevent the POY sizing agent from entering the connecting pipe 6 upward.

[0038] When the two tuning forks 16 need to be cleaned after long-term use, first cut off the delivery of the POY sizing agent in the production pipeline (simply close the valve on the production pipeline, which is a well-known prior art and will not be elaborated here). At this time, the POY sizing agent in the installation pipe 7 will be emptied from the discharge end. And at this time, start the electric push rod 4. The electric push rod 4 will drive the connecting frame 2 to move downward. The connecting frame 2 will drive the collar 11 to slide down the outer wall of the guide rod 1. The collar 11 will drive the two concave rods 12 and the two concave plates 10 to move downward together. Each concave rod 12 will drive the corresponding connecting rod 13 to move downward through the support column 32. Each concave plate 10 will also drive the corresponding connecting plate 20 to move downward through the support column 32. And each concave rod 12 and each concave plate 10 will also drive the L-shaped plates 26, guide columns 30, triangular blocks 27, spring three 33 and L-shaped rods 22 connected to them to move downward together. Each connecting rod 13 will drive the scraping rod 14 connected to it to move downward. Each connecting plate 20 will drive the scraping block 15 connected to it to move downward. The two scraping rods 14 and the two scraping blocks 15 will push the sealing ring 17 downward to slide in the connecting pipe 6, and the sealing ring 17 will also slide outside the guide rod 1. And the sealing ring 17 will also drive multiple connecting columns 19 to slide in the flange 3. And each connecting column 19 will drive the corresponding disk 21 connected to it to squeeze the spring one 25 between it and the flange 3.

[0039] When the upper end surfaces of each scraping rod 14 and each scraping block 15 move downward to be flush with the bottom end of the guide rod 1, one end of each L-shaped rod 22 will respectively move downward to pass through the corresponding spherical convex block 23. In this process, the end of the L-shaped rod 22 will form a squeeze with the spherical convex block 23. And under the action of the squeezing force, the L-shaped rod 22 will move away from the spherical convex block 23. The L-shaped rod 22 will drive the triangular block 27 to move together. The triangular block 27 will drive the guide column 30 to slide in the L-shaped plate 26. And the triangular block 27 will squeeze the spring three 33 between it and the L-shaped plate 26. Combining Figure 5 with Figure 6 this and in view of the above, then each triangular block 27 will respectively leave the two connecting rods 13 and the two connecting plates 20. At this time, under the action of the spring two 31 (the spring two 31 was originally in a compressed state), each connecting rod 13 will quickly move close to the collar 11 in the corresponding concave rod 12 and slide outside the corresponding support column 32. Each connecting plate 20 will quickly move close to the collar 11 in the corresponding concave plate 10 and slide outside the corresponding support column 32. Then the two scraping rods 14 will be quickly driven to closely fit the upper edge of the vertical plane corresponding to the two tuning forks 16 respectively, and the two scraping blocks 15 Figure 8The shown arc-shaped ends will be quickly driven to closely fit the upper edges of the arc surfaces that are away from the two tuning forks 16 respectively. After the end of each L-shaped rod 22 completely passes through the corresponding spherical bump 23, it will reset under the action of the third spring 33. Then, as the two scraping rods 14 and the two scraping blocks 15 continue to move downward, the dirt adhered to the outer surfaces of the two tuning forks 16 can be comprehensively scraped off, and the scraped dirt will fall along the inner ring opening of the sealing ring 17.

[0040] Subsequently, the two connecting rods 13 and the two connecting plates 20 are pulled in turn in the direction away from the collar 11. Each connecting rod 13 and each connecting plate 20 will compress the second spring 31, and each connecting rod 13 and each connecting plate 20 will move to press the inclined surface of the corresponding triangular block 27, causing the triangular block 27 to move closer to the L-shaped plate 26 and compress the third spring 33. When each connecting rod 13 and each connecting plate 20 move away from the corresponding triangular block 27, under the action of the third spring 33, each triangular block 27 will reset. And at this time, each connecting rod 13 and each connecting plate 20 are released, then each connecting rod 13 and each connecting plate 20 will again fit the vertical surfaces of the corresponding triangular blocks 27 under the action of the second spring 31. And at this time, the two scraping rods 14 and the two scraping blocks 15 will be driven away from the two tuning forks 16, that is, the two scraping rods 14 and the two scraping blocks 15 will not be blocked by the guide rod 1 when they need to move upward. Finally, the electric push rod 4 is used to drive the connecting frame 2 to move upward and reset, then the corresponding components that have moved before will move upward to reset. Among them, the end of each L-shaped rod 22 will again press the corresponding spherical bump 23, and during the process, the sealing ring 17 will move upward and reset under the action of the first spring 25, and will continue to seal the connecting pipe 6.

[0041] It should be noted that the external water supply pipeline can be connected to one of the splicing pipes 8, and the other splicing pipe 8 is connected to the external sewage tank through a pipeline. Water will enter the connecting pipe 6 from one splicing pipe 8, and under the action of the first spring 25, the sealing ring 17 will not move downward due to the gravity of the water. The outer ring surface and the inner ring surface of the sealing ring 17 are made of rubber, which can well seal the connecting pipe 6 and the gap with the guide rod 1. Finally, the water will be discharged into the sewage tank from the other splicing pipe 8, so as to clean the dirt adhered to the scraping rods 14 and the scraping blocks 15 and ensure the use effect of the scraping rods 14 and the scraping blocks 15 next time. Finally, continue to open the transportation of the POY sizing agent in the production pipeline (just reopen the valve on the production pipeline, which is a well-known prior art and will not be elaborated).

[0042] It should also be noted that, first of all, this densitometer can not only monitor the density of POY sizing agent in the production pipeline online and in real time, but also the dirt adhering to the two tuning forks 16 at the bottom of the densitometer can be cleaned without disassembling the densitometer, and there is no need to design an additional flushing system to flush the two tuning forks 16. This is not only convenient to operate, but also no water will mix into the POY sizing agent in the production process, which brings convenience. Secondly, the two scraping rods 14 and the two scraping blocks 15 for cleaning the two tuning forks 16 can adaptively and comprehensively clean by first moving down and then moving closer to the two tuning forks 16 to adapt to the positions of the two tuning forks 16 relative to the densitometer, and the cleaning effect is good. The two scraping rods 14 and the two scraping blocks 15 are also convenient for self-cleaning and convenient for normal use next time.

[0043] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line monitoring device for POY finish, comprising a machine head (9), a guide rod (1) connected to the bottom of the machine head (9), tuning forks (16) symmetrically connected to the bottom of the guide rod (1), and a flange (3) sleeved outside the guide rod (1), characterized in that: The lower end of the flange (3) is connected with a connecting pipe (6) through a flange. The lower end of the connecting pipe (6) communicates with an installation pipe (7). The guide rod (1) passes through the connecting pipe (6). Both of the tuning forks (16) are located inside the installation pipe (7). A collar (11) is slidably sleeved on the upper edge of the outer wall of the guide rod (1). Connecting rods (13) are arranged on the front and rear sides of the collar (11). Connecting plates (20) are arranged on both sides of the collar (11). An elastic connection mechanism is provided between the two connecting rods (13), the two connecting plates (20) and the collar (11). A lifting mechanism is provided between the collar (11) and the installation pipe (7). The two connecting rods (13) and the two connecting plates (20) are slidably arranged in the inner wall of the flange (3). The lower ends of the two connecting rods (13) are fixedly connected with scraping rods (14). The lower ends of the two connecting plates (20) are fixedly connected with scraping blocks (15). A sealing mechanism is provided between the connecting pipe (6) and the flange (3). The elastic connection mechanism includes two concave rods (12) and two concave plates (10). The two concave rods (12) are respectively fixedly connected to the front and rear parts of the outer wall of the collar (11). The two concave plates (10) are respectively fixedly connected to the two sides of the outer wall of the collar (11). The inner sides of the two concave rods (12) are respectively in sliding fit with the two connecting rods (13). The inner sides of the two concave plates (10) are respectively in sliding fit with the two connecting plates (20). A limiting component is provided on the two concave rods (12) and the two concave plates (10). The limiting component includes four L-shaped plates (26). One ends of two of the L-shaped plates (26) are respectively fixedly connected to the side walls of the two concave rods (12). One ends of the other two L-shaped plates (26) are respectively fixedly connected to the rear ends of the two concave plates (10). Guide columns (30) are slidably inserted through the vertical parts of the four L-shaped plates (26). One ends of the four guide columns (30) are respectively fixedly connected with triangular blocks (27). Spring threes (33) are fixedly connected between the four triangular blocks (27) and the four L-shaped plates (26). The four spring threes (33) are respectively slidably sleeved on the outer walls of the four guide columns (30). One vertical surface of two of the triangular blocks (27) is respectively in contact with the upper edge of the wall surface of the two connecting rods (13) corresponding to the collar (11). One vertical surface of the other two triangular blocks (27) is respectively in contact with the upper edge of the wall surface of the two connecting plates (20) corresponding to the collar (11). A linkage component is provided between the four triangular blocks (27) and the flange (3). The linkage assembly includes four L-shaped rods (22) and four fixing plates (24). One end of each of the four L-shaped rods (22) is fixedly connected to the upper ends of the four triangular blocks (27). The four fixing plates (24) are evenly distributed and fixedly connected to the upper end of the flange (3). Spherical convex blocks (23) are fixedly connected to the upper edge of the outer wall of each of the four fixing plates (24). The four spherical convex blocks (23) are respectively on the movement paths of the other ends of the four L-shaped rods (22). Chutes II (29) are respectively formed at the upper end of the flange (3) corresponding to the two connecting rods (13), and chutes I (28) are respectively formed at the upper end of the flange (3) corresponding to the two connecting plates (20). The two chutes II (29) are respectively in sliding fit with the two connecting rods (13), and the two chutes I (28) are respectively in sliding fit with the two connecting plates (20).

2. The on-line monitoring device for POY finish according to claim 1, wherein: The elastic connection mechanism further includes four support columns (32). One end of each of the four support columns (32) is fixedly connected to the outer wall of the collar (11). The other ends of two of the support columns (32) are respectively fixedly connected to the inner sides of the two concave rods (12) away from the collar (11), and the other ends of the other two support columns (32) are respectively fixedly connected to the inner sides of the two concave plates (10) away from the collar (11). Compression springs II (31) are fixedly connected between the walls of the two connecting rods (13) away from the collar (11) and the inner sides of the two concave rods (12), and between the walls of the two connecting plates (20) away from the collar (11) and the inner sides of the two concave plates (10). The four compression springs II (31) are respectively sleeved on the outer walls of the four support columns (32), and the four support columns (32) respectively pass through the two connecting rods (13) and the two connecting plates (20) movably.

3. The on-line monitoring device for POY finish according to claim 1, characterized in that: The lifting mechanism includes a support plate (5). The support plate (5) is fixedly connected to the outer wall of the installation pipe (7). An electric push rod (4) is fixedly installed at the upper end of the support plate (5). The telescopic shaft end of the electric push rod (4) is fixedly connected to a connecting frame (2). The end of the connecting frame (2) away from the electric push rod (4) is fixedly connected to the outer wall of the collar (11).

4. An on-line monitoring device for POY finish according to claim 1, characterized in that: The sealing mechanism includes a sealing ring (17). The sealing ring (17) is located below the scraping rod (14) and the scraping block (15). The sealing ring (17) is slidably sleeved on the outer wall of the guide rod (1). The outer ring surface of the sealing ring (17) is in contact with the inner wall of the connecting pipe (6). At the upper edge of the sealing ring (17), a plurality of evenly distributed arc-shaped blocks (18) are arranged in a fitting manner. A plurality of the arc-shaped blocks (18) are fixedly connected to the inner wall of the connecting pipe (6). At the upper part near the edge of the sealing ring (17), a plurality of evenly distributed connecting columns (19) are fixedly connected. A plurality of the connecting columns (19) all movably penetrate through the upper end of the flange plate (3). At the upper ends of the plurality of connecting columns (19), discs (21) are fixedly connected. Between the lower ends of the plurality of discs (21) and the flange plate (3), first springs (25) are fixedly connected. A plurality of the first springs (25) are respectively slidably sleeved on the outer walls of the plurality of connecting columns (19).

5. The on-line monitoring device for POY finish according to claim 1, characterized in that: Splicing pipes (8) are communicated with both the front and rear parts of the outer wall of the connecting pipe (6).

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