Gear pump for conveying polymer resin and use method of gear pump

Abstract

The invention relates to the technical field of gear pumps, and discloses a gear pump for conveying polymer resin and a using method thereof.The gear pump comprises a pump body, the pump body comprises a shell, a driving gear and a driven gear are arranged in the shell, and the driving gear and the driven gear are meshed with each other; one side of the driving gear is fixedly connected with an active driving rotary drum, a lubricating oil supply device is arranged in the active driving rotary drum, the lubricating oil supply device comprises a fixed cylinder arranged in the active driving rotary drum, an oil supply channel is formed in the fixed cylinder, one end of the oil supply channel communicates with an oil supply pipe, and the other end of the oil supply pipe communicates with a lubricating oil pump; a center channel, a transmission channel, a dispersion channel and an oil seepage channel are formed in the driving gear, the center channel is communicated with the oil supply channel, the gear block of the gear is coated with lubricating oil, and the problem that viscous polymer resin may adhere to the gear block is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gear pumps, and particularly to a gear pump for polymer resin transportation and its usage method. Background Technique

[0002] A polymer, also known as a macromolecular compound, is a compound formed by thousands of atoms covalently bonded to each other, having a particularly large relative molecular mass and a repeating structural unit. These compounds can be divided into inorganic macromolecular compounds and organic macromolecular compounds. According to the size of the relative molecular mass, polymers can be divided into low relative molecular mass polymers, medium relative molecular mass polymers, high relative molecular mass polymers, ultra-high relative molecular mass polymers, etc. Among them, a polymer with a relative molecular mass of 1200×104 is called a medium relative molecular mass polymer.

[0003] In the production and application processes of polymers, it is often necessary to transport them. As a commonly used liquid transportation device, a gear pump has the characteristics of small volume and high output pressure, and is very suitable for polymer transportation. A gear pump can generate a certain pressure to keep the polymer at a certain pressure stability during transportation, preventing the material from fluctuating or flowing back during transportation. The gear pump transports materials by means of gear meshing and has a high transportation efficiency. At the same time, due to its good sealing performance, it can prevent material leakage and external impurities from entering, ensuring the purity and quality of the material. The gear pump can adapt to various high-temperature, high-pressure, and corrosive polymer molten materials and has a wide range of applications. Especially in the polymer production process, such as the transportation of the stock solution, prepolymer, and final polymer of resin, chemical fiber, rubber, etc., the gear pump shows good adaptability. The adjustment mechanism of the gear pump can adjust the flow rate and pressure according to actual needs, making the transportation process more flexible and controllable. This not only helps to improve production efficiency but also allows for personalized adjustment according to different process requirements.

[0004] However, polymers have different physical properties according to their types. Some polymers have certain viscosity. For example, there are various types of viscous polymers, commonly including acid anhydride-modified ethylene-vinyl acetate copolymer (EVA modified adhesive resin), acid anhydride-modified linear low-density polyethylene polymer (LLDPE adhesive resin), acid anhydride-modified high-density polyethylene polymer (HDPE adhesive resin), etc. adhesive polymers, as well as adhesives such as universal glue, hot melt glue, and silicone rubber. These polymers can exhibit strong adhesion under specific conditions. During the transportation of these viscous polymers by a gear pump, the polymer resin may adhere to the tooth blocks of the gear pump, and as a result, during the operation of the gear pump, adhesion may occur, leading to a decrease in the rotation rate. Therefore, it does not meet the existing requirements, and for this reason, we propose a gear pump for polymer resin transportation and its usage method. Summary of the Invention

[0005] The present invention provides a gear pump for polymer resin transportation and its usage method, which has the beneficial effect of applying lubricating oil to the tooth blocks of the gear, and solves the problem that the viscous polymer resin may adhere to the tooth blocks mentioned in the above background technology.

[0006] The present invention provides the following technical solution: A gear pump for polymer resin transportation, including a pump body, the pump body includes a housing, an active gear and a driven gear are arranged in the housing, the active gear and the driven gear mesh with each other, one side of the active gear is fixedly connected with an active drive drum, and a lubricating oil supply device is arranged in the active drive drum.

[0007] The lubricating oil supply device includes a fixed cylinder arranged in the active drive drum, an oil supply channel is opened in the fixed cylinder, one end of the oil supply channel is communicated with an oil supply pipe, a central channel, a transmission channel, a dispersion channel and an oil seepage channel are opened in the active gear, the central channel is communicated with the oil supply channel, and the oil supply pipe is made of a hard material.

[0008] As an alternative embodiment of the gear pump for polymer resin transportation according to the present invention, wherein: an input pipe and an output pipe are arranged on both sides of the housing, a power gear ring is fixedly connected to the side wall of the active drive drum, the power gear ring is meshed with a motor gear, the motor gear is installed at the output end of a drive motor, and the drive motor is arranged on one side of the housing.

[0009] As an alternative embodiment of the gear pump for polymer resin transportation according to the present invention, wherein: a rotation groove is opened on the side wall of the active gear, a rotation ring is rotatably connected in the rotation groove, the rotation ring is fixedly connected to one side of the fixed cylinder, the dispersion channel and the oil seepage channel are arranged at the tooth blocks of the active gear and the driven gear, multiple groups of the transmission channels are arranged in a circumferential array, and the central channel is located at the centers of the active gear and the driven gear.

[0010] As an alternative embodiment of the gear pump for polymer resin transportation according to the present invention, wherein: a piston device is arranged in the fixed cylinder, the piston device includes a piston plate slidably connected in the oil supply channel, one side of the piston plate is fixedly connected with a piston folding rod, the other end of the piston folding rod is slidably connected in a first track groove, the first track groove is opened in the active drive drum, a first one-way channel is opened in the piston plate, and a second one-way channel is opened on one side of the fixed cylinder.

[0011] As an alternative solution of the gear pump for polymer resin transportation according to the present invention, wherein: scraping devices are provided at the upper and lower ends of the housing, the scraping devices include installation grooves opened on the inner wall of the housing, a fixed shaft is installed in the installation grooves, a swing ring is rotatably connected to the outer side wall of the fixed shaft, and a rectangular rod is fixedly connected to the side wall of the swing ring.

[0012] As an alternative solution of the gear pump for polymer resin transportation according to the present invention, wherein: both ends of the fixed shaft and the swing ring are arranged inside the housing, and a torsion spring is arranged between the fixed shaft and the swing ring.

[0013] As an alternative solution of the gear pump for polymer resin transportation according to the present invention, wherein: a uniform coating device is arranged inside the swing ring, the uniform coating device includes left and right swing chutes opened in the rectangular rod, a swing rod is slidably connected in the left and right swing chutes, a connecting rod is installed at the bottom of the swing rod, and the other end of the connecting rod is fixedly connected to a coating plate, and the coating plate is a rectangular plate.

[0014] As an alternative solution of the gear pump for polymer resin transportation according to the present invention, wherein: the top of the swing rod is fixedly connected to a slider, and the slider is slidably connected in a second track groove opened in the fixed shaft.

[0015] As an alternative solution of the gear pump for polymer resin transportation according to the present invention, wherein: a rotating device is arranged at the bottom of the swing rod, the rotating device includes a rotating groove opened in the swing rod, a rotating block is rotatably connected in the rotating groove, the other end of the rotating block is fixedly connected to one side of the connecting rod, a rotating gear is fixedly connected to the side wall of the connecting rod, the rotating gear is meshed with a driving tooth block, and the driving tooth block is installed in a chute opened on the side wall of the rectangular rod.

[0016] The present invention also discloses a usage method of the gear pump for polymer resin transportation, which further includes the following steps, wherein: includes the following steps: S1. Check the states of the gear pump and the motor, including whether the pump body is stuck, whether the packing is tight, whether the component connections are firm, whether the lubricating oil is appropriate, etc. Ensure that the sealing performance of each joint is good and the valve is in the correct position; S2. Place a metal filter net in front of the inlet of the gear pump, and when starting the gear pump for the first time, first inject the polymer resin to be transported into the pump, open the valves of the suction and discharge pipelines, and discharge the gas in the gear pump; S3. Start the motor, observe whether the rotation direction of the gear pump is correct, listen for any abnormal sounds, and check the shaft seal leakage situation; S4. During operation, special attention should be paid to the temperature and current conditions of each part of the pump body. Once any abnormality occurs, the machine should be stopped immediately for inspection; S5. First, cut off the power supply to stop the motor, then gradually close the outlet valve. After the gear pump stops running, close the inlet valve.

[0017] The present invention has the following beneficial effects: 1. For the gear pump for transporting polymer resin and its usage method, driven by the piston device, the lubricating oil supply device continuously supplies lubricating oil to the dispersion channel through the supply pipe. Since the diameter of the dispersion channel is designed to be relatively narrow and the lubricating oil itself is relatively thick, under the drive of the piston device, the lubricating oil will not spray out through the dispersion channel, but slowly seep out through the dispersion channel. Through this design, a large amount of lubricating oil covers the side walls of the tooth blocks of the driving gear and the driven gear. Through the coverage of the lubricating oil, it can effectively prevent the polymer from adhering to the tooth blocks of the gear, ensuring the transportation effect of the gear pump on the polymer.

[0018] 2. For the gear pump for transporting polymer resin and its usage method, during the rotation of the driving gear and the driven gear, their tooth blocks will continuously contact the rectangular rod, driving the swing ring fixedly connected to the rectangular rod to rotate around the fixed shaft. Since a torsion spring is provided between the fixed shaft and the swing ring, after the tooth block no longer contacts the rectangular rod, the rectangular rod will reset under the action of the torsion spring. While the rectangular rod swings, the swing rod located inside the rectangular rod swings synchronously. Since a slider is provided at the top of the swing rod and the second track groove is slidably connected to the second track groove, when the rectangular rod swings left and right, it will drive the swing rod to swing in the left and right swing chute. Since the bottom of the swing rod is connected with a coating plate, when the driving gear contacts the rectangular rod, the coating plate also contacts the inner wall of the tooth block of the driving gear. By driving the coating plate to swing back and forth through the swing rod, the lubricating oil oozing out from the side wall of the driving gear can be smeared, thereby ensuring the coverage range of the lubricating oil and ensuring that the polymer resin will not adhere to the tooth block.

[0019] 3. For the gear pump for transporting polymer resin and its usage method, through the design of the rotating device, the smearing effect of the coating plate on the lubricating oil on the side wall of the tooth block of the driving gear is further improved. Since the rotating gear on the side wall of the connecting rod meshes with the driving tooth block on the inner wall of the chute, during the sliding of the swing rod, the connecting rod will rotate. And one end of the connecting rod is equipped with a coating plate, so the rectangular coating plate will rotate, making the coating plate rotate in a circular motion when smearing the lubricating oil. Through this design, the uniformity effect of the lubricating oil during smearing can be further improved. Description of the Drawings

[0020] Figure 1 Structural schematic of the present invention Figure 1 .

[0021] Figure 2 Schematic structure of the present invention Figure 2 .

[0022] Figure 3 Schematic top view structure of the present invention.

[0023] Figure 4 Of the present invention Figure 3 Schematic structure of the 1-1 cross-section in

[0024] Figure 5 Of the present invention Figure 3 Schematic structure of the 2-2 cross-section in

[0025] Figure 6 Of the present invention Figure 4 Schematic enlarged structure at position A in

[0026] Figure 7 Of the present invention Figure 6 Schematic enlarged structure at position B in

[0027] Figure 8 Of the present invention Figure 4 Schematic enlarged structure at position C in

[0028] Figure 9 Of the present invention Figure 8 Schematic enlarged structure at position D in

[0029] Figure 10 Of the present invention Figure 3 Schematic enlarged structure at position E in

[0030] Figure 11 Schematic structure of the rotating device of the present invention

[0031] Figure 12 Schematic structure of the connection between the second track groove and the fixed shaft of the present invention

[0032] In the figure: 1. Pump body; 11. Housing; 12. Input pipe; 13. Output pipe; 14. Driving gear; 15. Driven gear; 16. Driving drive drum; 17. Power gear ring; 18. Motor gear; 19. Driving motor; 2. Lubricating oil supply device; 21. Fixed cylinder; 22. Oil supply pipe; 23. Oil supply channel; 24. Rotating ring; 25. Rotating groove; 26. Central channel; 27. Transmission channel; 28. Dispersion channel; 29. Oil seepage channel; 3. Piston device; 31. Piston plate; 32. Piston folding rod; 33. First track groove; 34. First one-way channel; 35. Second one-way channel; 4. Scraping device; 41. Installation groove; 42. Fixed shaft; 43. Swing ring; 44. Torsion spring; 45. Rectangular rod; 5. Uniform coating device; 51. Left and right swing chute; 52. Swing rod; 53. Slide block; 54. Second track groove; 55. Connecting rod; 56. Coating plate; 6. Rotating device; 61. Rotating groove; 62. Rotating block; 63. Chute; 64. Rotating gear; 65. Driving tooth block. Specific implementation mode

[0033] 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.

[0034] Embodiment 1. The purpose of this embodiment is to facilitate the solution of the problem that sticky polymer resin may adhere to the tooth block. Please refer to Figures 1 to 12 A gear pump for polymer resin transportation, including a pump body 1. The pump body 1 includes a housing 11. A driving gear 14 and a driven gear 15 are arranged in the housing 11. The driving gear 14 and the driven gear 15 are meshed with each other. One side of the driving gear 14 is fixedly connected with a driving drive drum 16, and a lubricating oil supply device 2 is arranged in the driving drive drum 16.

[0035] An input pipe 12 and an output pipe 13 are arranged on both sides of the housing 11. A power gear ring 17 is fixedly connected to the side wall of the driving drive drum 16. The power gear ring 17 is meshed with a motor gear 18. The motor gear 18 is installed at the output end of a driving motor 19. The driving motor 19 is arranged on one side of the housing 11.

[0036] Driven by the drive motor 19, the motor gear 18 starts to rotate. Due to the meshing connection between the motor gear 18 and the power tooth ring 17, the active drive drum 16 equipped with the power tooth ring 17 is driven to start rotating. Since one end of the active drive drum 16 is fixedly connected to one side of the active gear 14, the active gear 14 starts to rotate, and through the meshing of the active gear 14 and the driven gear 15, the active gear 14 and the driven gear 15 are driven to rotate relatively within the housing 11. Through the relative rotation of the active gear 14 and the driven gear 15, the viscous polymer resin entering the housing 11 through the input pipe 12 is transported out through the output pipe 13.

[0037] The lubricating oil supply device 2 includes a fixed cylinder 21 arranged inside the active drive drum 16. An oil supply channel 23 is opened inside the fixed cylinder 21. One end of the oil supply channel 23 is communicated with an oil supply pipe 22. A central channel 26, a transmission channel 27, a dispersion channel 28, and an oil seepage channel 29 are opened inside the active gear 14. The central channel 26 is communicated with the oil supply channel 23.

[0038] A rotating groove 25 is opened on the side wall of the active gear 14. A rotating ring 24 is rotatably connected inside the rotating groove 25. The rotating ring 24 is fixedly connected to one side of the fixed cylinder 21. The dispersion channel 28 and the oil seepage channel 29 are arranged at the tooth blocks of the active gear 14 and the driven gear 15. There are multiple groups of the transmission channels 27 arranged in a circumferential array. The central channel 26 is located at the center of the active gear 14 and the driven gear 15.

[0039] Driven by the piston device 3, the lubricating oil supply device 2 continuously supplies to the dispersion channel 28 through the oil supply pipe 22. Since the diameter of the dispersion channel 28 is designed to be relatively narrow and the lubricating oil itself is relatively thick, under the drive of the piston device 3, the lubricating oil does not spray out through the dispersion channel 28, but slowly seeps out through the dispersion channel 28. Through this design, a large amount of lubricating oil covers the side walls at the tooth blocks of the active gear 14 and the driven gear 15. Through the covering of the lubricating oil, it can effectively prevent the polymer from adhering to the tooth blocks of the gear, ensuring the transportation effect of the gear pump on the polymer.

[0040] Through the design of the rotating ring 24 and the rotating groove 25, the relative rotation between the active gear 14 and the fixed cylinder 21 is ensured, avoiding the situation of relative jamming between the two.

[0041] A piston device 3 is arranged inside the fixed cylinder 21. The piston device 3 includes a piston plate 31 slidably connected inside the oil supply channel 23. One side of the piston plate 31 is fixedly connected to a piston folding rod 32. The other end of the piston folding rod 32 is slidably connected inside a first track groove 33. The first track groove 33 is opened inside the active drive drum 16. A first one-way channel 34 is opened inside the piston plate 31. A second one-way channel 35 is opened on one side of the fixed cylinder 21.

[0042] The driving gear 14 rotates relative to the fixed cylinder 21. When the two rotate relative to each other, the first track groove 33 will drive the piston folding rod 32 to continuously swing left and right. Since the other end of the piston folding rod 32 is provided with a piston plate 31, and the piston plate 31 is slidably connected within the fixed cylinder 21, therefore, through the relative rotation between the driving gear 14 and the fixed cylinder 21, the piston plate 31 can be driven to perform a piston motion within the driving gear 14. At the same time, since a first one-way channel 34 is opened within the piston plate 31 and a second one-way channel 35 is opened within the fixed cylinder 21, when the piston plate 31 moves to the left, the lubricating oil within the fixed cylinder 21 is pushed to the left. Meanwhile, lubricating oil is sucked into the fixed cylinder 21 from the oil sump through the oil supply pipe 22. When the piston plate 31 slides to the right, the lubricating oil within the right space of the fixed cylinder 21 is squeezed and sent to the left side of the piston plate 31 through the first one-way channel 34. Through this cycle, lubricating oil can be continuously supplied to the dispersion channel 28, thereby ensuring the lubrication effect at the tooth blocks of the driving gear 14 and the driven gear 15, effectively avoiding the situation where polymers adhere to the tooth blocks of the driving gear 14 and the driven gear 15, and thus affecting the transportation effect of the gear pump.

[0043] Embodiment 2. The purpose of this embodiment is to facilitate the solution to the problem that the exuded lubricating oil is relatively dispersed. This embodiment is an explanatory description made on the basis of Embodiment 1. Specifically, please refer to Figures 1 to 12 There is a scraping device 4 provided at the upper and lower ends of the housing 11. The scraping device 4 includes a mounting groove 41 opened on the inner wall of the housing 11. A fixed shaft 42 is installed within the mounting groove 41. A swinging ring 43 is rotatably connected to the outer side wall of the fixed shaft 42. A rectangular rod 45 is fixedly connected to the side wall of the swinging ring 43.

[0044] Both ends of the fixed shaft 42 and the swinging ring 43 are provided within the housing 11. A torsion spring 44 is provided between the fixed shaft 42 and the swinging ring 43.

[0045] A uniform coating device 5 is provided within the swinging ring 43. The uniform coating device 5 includes a left - right swinging chute 51 opened within the rectangular rod 45. A swinging rod 52 is slidably connected within the left - right swinging chute 51. A connecting rod 55 is installed at the bottom of the swinging rod 52. The other end of the connecting rod 55 is fixedly connected to a coating plate 56.

[0046] A slider 53 is fixedly connected to the top of the swinging rod 52. The slider 53 is slidably connected within a second track groove 54. The second track groove 54 is opened within the fixed shaft 42.

[0047] During the rotation of the driving gear 14 and the driven gear 15, their tooth blocks will continuously contact the rectangular rod 45, driving the swing ring 43 fixedly connected to the rectangular rod 45 to rotate around the fixed shaft 42. Since a torsion spring 44 is provided between the fixed shaft 42 and the swing ring 43, after the tooth block no longer contacts the rectangular rod 45, the rectangular rod 45 will reset under the action of the torsion spring 44. While the rectangular rod 45 is swinging, the swing rod 52 located inside the rectangular rod 45 swings synchronously. Since a slider 53 is provided at the top of the swing rod 52 and the second track groove 54 is slidably connected in the second track groove 54, when the rectangular rod 45 swings left and right, it will drive the swing rod 52 to swing in the left and right swing chute 51. Since the bottom of the swing rod 52 is connected with a coating plate 56, when the driving gear 14 contacts the rectangular rod 45, the coating plate 56 also contacts the inner wall of the tooth block of the driving gear 14. By driving the coating plate 56 to swing back and forth through the swing rod 52, the lubricating oil oozing out from the side wall of the driving gear 14 is coated, thereby ensuring the coverage range of the lubricating oil and ensuring the effect that the polymer resin will not adhere to the tooth block.

[0048] Embodiment 3. The purpose of this embodiment is to promote the solution to the problem of further improving the uniform coating of lubricating oil. This embodiment is an explanatory description based on Embodiment 2. Specifically, please refer to Figures 1 to 12 , a rotating device 6 is provided at the bottom of the swing rod 52. The rotating device 6 includes a rotating groove 61 opened in the swing rod 52. A rotating block 62 is rotatably connected in the rotating groove 61. The other end of the rotating block 62 is fixedly connected to one side of the connecting rod 55. A rotating gear 64 is fixedly connected to the side wall of the connecting rod 55. The rotating gear 64 is meshed with a driving tooth block 65. The driving tooth block 65 is installed in a chute 63. The chute 63 is opened in the side wall of the rectangular rod 45.

[0049] Through the design of the rotating device 6, the coating effect of the coating plate 56 on the side wall of the tooth block of the driving gear 14 with lubricating oil is further improved. Since the rotating gear 64 on the side wall of the connecting rod 55 is meshed with the driving tooth block 65 on the inner wall of the chute 63, during the sliding process of the swing rod 52, the connecting rod 55 will rotate. And one end of the connecting rod 55 is installed with a coating plate 56. Therefore, the rectangular coating plate 56 will rotate, so that when the coating plate 56 coats the lubricating oil, it will rotate in a circular motion. Through this design, the uniform effect of the lubricating oil during coating can be further improved.

[0050] This embodiment also discloses a using method of a gear pump for polymer resin transportation, including the following steps: S1. Check the states of the gear pump and the motor, including whether the pump body is stuck, whether the packing is tight, whether the component connections are firm, whether the lubricating oil is appropriate, etc. Ensure that the sealing performance of each joint is good and the valve is in the correct position; S2. Place a metal filter before the inlet of the gear pump. When starting the gear pump for the first time, first inject the polymer resin to be transported into the pump, open the valves of the suction and discharge pipelines, and remove the gas in the gear pump. S3. Start the motor, observe whether the rotation direction of the gear pump is correct, listen for any abnormal sounds, and check the shaft seal leakage situation. S4. During operation, pay special attention to the temperature and current conditions of each part of the pump body. Once any abnormality occurs, stop the machine immediately for inspection. S5. First cut off the power supply to stop the motor, then gradually close the outlet valve. After the gear pump stops running, close the inlet valve.

[0051] It should be noted that in this text, 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 variation 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.

[0052] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A gear pump for polymer resin transportation, comprising a pump body (1), characterized in that: The pump body (1) includes a housing (11), inside which an active gear (14) and a driven gear (15) are arranged. The active gear (14) and the driven gear (15) mesh with each other. One side of the active gear (14) is fixedly connected to an active drive drum (16), and a lubricating oil supply device (2) is arranged inside the active drive drum (16). The lubricating oil supply device (2) includes a fixed cylinder (21) arranged inside the active drive drum (16). An oil supply channel (23) is opened inside the fixed cylinder (21). One end of the oil supply channel (23) is communicated with an oil supply pipe (22). A central channel (26), a transmission channel (27), a dispersion channel (28), and an oil seepage channel (29) are opened inside the active gear (14), and the central channel (26) is communicated with the oil supply channel (23).

2. The gear pump for polymer resin transportation according to claim 1, wherein: An input pipe (12) and an output pipe (13) are arranged on both sides of the housing (11). A power tooth ring (17) is fixedly connected to the side wall of the active drive drum (16). The power tooth ring (17) is meshed with a motor gear (18), and the motor gear (18) is installed at the output end of a drive motor (19). The drive motor (19) is arranged on one side of the housing (11).

3. A gear pump for polymer resin transportation according to claim 1, characterized in that: A rotating groove (25) is opened on the side wall of the active gear (14). A rotating ring (24) is rotatably connected inside the rotating groove (25), and the rotating ring (24) is fixedly connected to one side of the fixed cylinder (21). The dispersion channel (28) and the oil seepage channel (29) are arranged at the tooth blocks of the active gear (14) and the driven gear (15). There are multiple groups of the transmission channels (27) arranged in a circumferential array, and the central channel (26) is located at the centers of the active gear (14) and the driven gear (15).

4. The gear pump for polymer resin transportation according to claim 3, characterized in that: A piston device (3) is arranged inside the fixed cylinder (21). The piston device (3) includes a piston plate (31) slidably connected inside the oil supply channel (23). One side of the piston plate (31) is fixedly connected to a piston folding rod (32), and the other end of the piston folding rod (32) is slidably connected inside a first track groove (33). The first track groove (33) is opened inside the active drive drum (16). A first one-way channel (34) is opened inside the piston plate (31), and a second one-way channel (35) is opened on one side of the fixed cylinder (21).

5. A gear pump for polymer resin transportation according to claim 4, characterized in that: Scraping devices (4) are arranged at the upper and lower ends of the housing (11). The scraping devices (4) include mounting grooves (41) opened on the inner wall of the housing (11). A fixed shaft (42) is installed inside the mounting grooves (41). A swinging ring (43) is rotatably connected to the outer side wall of the fixed shaft (42), and a rectangular rod (45) is fixedly connected to the side wall of the swinging ring (43).

6. The gear pump for polymer resin transportation according to claim 5, wherein: Both ends of the fixed shaft (42) and the swinging ring (43) are arranged inside the housing (11), and a torsion spring (44) is arranged between the fixed shaft (42) and the swinging ring (43).

7. A gear pump for polymer resin transportation according to claim 5, characterized in that: A uniform coating device (5) is arranged inside the swing ring (43). The uniform coating device (5) includes a left - right swing chute (51) opened in the rectangular rod (45). A swing rod (52) is slidably connected inside the left - right swing chute (51). A connecting rod (55) is installed at the bottom of the swing rod (52). The other end of the connecting rod (55) is fixedly connected to a coating plate (56).

8. A gear pump for polymer resin transportation according to claim 7, characterized in that: A slider (53) is fixedly connected to the top of the swing rod (52). The slider (53) is slidably connected inside a second track groove (54). The second track groove (54) is opened in the fixed shaft (42).

9. A gear pump for polymer resin transportation according to claim 7, characterized in that: A rotating device (6) is arranged at the bottom of the swing rod (52). The rotating device (6) includes a rotating groove (61) opened in the swing rod (52). A rotating block (62) is rotatably connected inside the rotating groove (61). The other end of the rotating block (62) is fixedly connected to one side of the connecting rod (55). A rotating gear (64) is fixedly connected to the side wall of the connecting rod (55). The rotating gear (64) is meshed with a driving tooth block (65). The driving tooth block (65) is installed inside a chute (63). The chute (63) is opened in the side wall of the rectangular rod (45).

10. A method of using a gear pump for polymer resin transportation, which uses a gear pump for polymer resin transportation described in claims 1-9, characterized in that: The following steps are further included: S1. Check the states of the gear pump and the motor, including whether the pump body is stuck, whether the packing is tight, whether the component connections are firm, whether the lubricating oil is appropriate, etc. Ensure that the sealing of each joint is good and the valve is in the correct position; S2. Place a metal filter net in front of the inlet of the gear pump. When starting the gear pump for the first time, first inject the polymer resin to be transported into the pump. Open the valves of the suction and discharge pipelines to remove the gas inside the gear pump; S3. Start the motor, observe whether the rotating direction of the gear pump is correct, listen for any abnormal sounds, and check the shaft seal leakage situation; S4. During operation, pay special attention to the temperature and current conditions of each part of the pump body. Once an abnormality occurs, stop the machine immediately for inspection; S5. First cut off the power supply to stop the motor, then gradually close the outlet valve. After the gear pump stops running, close the inlet valve.

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