Metering pump and method for producing polytetrafluoroethylene

Abstract

The invention relates to the technical field of metering pumps, and provides a metering pump and method applied to polytetrafluoroethylene production, and the metering pump comprises a pump body mechanism which is used for pumping a polytetrafluoroethylene raw material from a material storage tank to a machine for a next processing procedure; the pumping mechanism is used for changing the pressure intensity in the pump body mechanism to pump the polytetrafluoroethylene raw material; the adjusting mechanism is used for enabling the polytetrafluoroethylene to be in a rotating state in the pump body mechanism in the pumping process; and the driving mechanism is used for driving the pumping mechanism to change the pressure intensity in the pump body mechanism. Raw materials are prevented from adhering to and remaining on the inner wall of the piston bin due to pressure change during material pumping and feeding in the piston bin, so that the piston seat and a sealing ring are prevented from being abraded due to friction between the piston seat and the raw materials remaining on the inner wall of the piston bin when the piston seat moves in the piston bin; and meanwhile, the possibility that the vibration amplitude of the metering pump is too large in the using process due to friction between the piston seat and the residual raw materials on the inner wall of the piston bin is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of metering pumps, and in particular to a metering pump and method for producing polytetrafluoroethylene. Background Art

[0002] In the production process of polytetrafluoroethylene, the accurate metering and stable transportation of raw materials are the key links to ensure product quality. At present, due to its simple structure and relatively high metering accuracy, the plunger metering pump has become the main equipment for pumping polytetrafluoroethylene raw materials in production.

[0003] However, there are many problems in the actual application of existing plunger metering pumps. During the material suction and feeding processes, due to the change of internal pressure in the pump body, the polytetrafluoroethylene raw materials are likely to adhere and remain on the inner wall of the piston chamber and the pump shell. These residual raw materials will not only cause excessive friction when the piston seat and the sealing ring move, resulting in component wear and shortening the service life of the metering pump, but also increase the maintenance frequency and cost of the equipment. In addition, the friction caused by raw material residue will cause excessive amplitude during the operation of the metering pump, affecting the equipment stability and metering accuracy, and even may lead to poor raw material pumping, seriously affecting the production efficiency and product quality of polytetrafluoroethylene. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a metering pump and method for producing polytetrafluoroethylene to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides a metering pump for producing polytetrafluoroethylene, including: A pump body mechanism for pumping polytetrafluoroethylene raw materials from a storage tank to a machine in the next processing procedure; A pumping mechanism for changing the internal pressure of the pump body mechanism to pump polytetrafluoroethylene raw materials; An adjustment mechanism for keeping polytetrafluoroethylene in a rotating state inside the pump body mechanism during the pumping process; A driving mechanism for driving the pumping mechanism to change the internal pressure of the pump body mechanism; The pumping mechanism includes a limit chamber and a piston chamber. A universal coupling is slidably connected inside the limit chamber. The left end of the universal coupling is fixedly connected to a pull shaft. Spiral grooves are evenly distributed on the outer periphery of the pull shaft. The left end of the spiral groove is fixedly connected to a piston seat. A sealing ring is fixedly connected to the outer periphery of the piston seat. A spiral blade is fixedly connected to the left end of the piston seat. The outer peripheries of the piston seat and the sealing ring are both slidably connected inside the piston chamber.

[0006] Preferably, the driving mechanism includes a driving chamber, a lower side of a front end of the driving chamber is fixedly connected with an eccentric motor, a driving end of a rear end of the eccentric motor is fixedly connected with a worm, the worm is meshed and connected with a turbine, a middle part of the turbine is fixedly connected with a driving shaft one, an upper end of the driving shaft one is fixedly connected with a cam disc, a wedge block is slidably connected inside an upper end opening of the cam disc, an upper end of the wedge block is fixedly connected with a rotating seat, an upper end of the rotating seat is rotatably connected with a threaded rod through a bearing, a middle outer periphery of the threaded rod is rotatably connected with a threaded seat, an upper end of the threaded rod is fixedly connected with a turntable, and a left end inside the cam disc is rotatably connected with a driving shaft two.

[0007] Preferably, a left end of the driving chamber is fixedly connected to a right end of the limiting chamber, front and rear ends of the worm are rotatably connected to middle lower parts of front and rear inner sides of the driving chamber, and a lower end of the driving shaft one is rotatably connected to a middle part of an inner bottom wall of the driving chamber through a bearing.

[0008] Preferably, a lower end of the threaded seat is fixedly connected to a middle part of an upper end of the driving chamber, and a left end of the driving shaft two is fixedly connected to a right end of a universal coupling.

[0009] Preferably, the pump body mechanism includes a pump housing, a lower end of the pump housing is flange-connected with a feed inlet, an upper end of the pump housing is flange-connected with a discharge outlet, inclined openings are fixedly connected inside both the feed inlet and the discharge outlet, feed boxes are rotatably connected to upper and lower ends inside the pump housing, spiral openings are uniformly formed in upper ends of the feed boxes, second springs are fixedly connected to inner tops of the feed boxes, sealing balls are fixedly connected to lower ends of the second springs, and second magnetic blocks are uniformly distributed on outer peripheries of the feed boxes.

[0010] Preferably, outer peripheries of the sealing balls are slidably connected to lower inner ends of the feed boxes, and a middle part of a right end of the pump housing is fixedly connected to a left end of a piston chamber.

[0011] Preferably, the adjusting mechanism includes an adjusting chamber and a rotating chamber, first helical gears are rotatably connected to upper and lower ends of a middle part inside the adjusting chamber, the first helical gears are respectively meshed and connected with second helical gears, driving rods are fixedly connected to middle parts of the second helical gears, spur gears are fixedly connected to left ends of the driving rods, the spur gears are respectively meshed and connected with toothed discs, first magnetic blocks are uniformly distributed inside the toothed discs, outer peripheries of the toothed discs are rotatably connected to interiors of the rotating chamber, connecting chambers are fixedly connected to upper and lower sides of a left end of the adjusting chamber, ratchets are rotatably connected to interiors of the connecting chambers, middle parts of the ratchets are fixedly connected to outer peripheries of middle right ends of the driving rods, the ratchets are respectively meshed and connected with pawls, connecting rods are fixedly connected to ends of the pawls away from the ratchets, and first springs are sleeved on outer peripheries of the connecting rods.

[0012] Preferably, the left end of the adjustment chamber is fixedly connected to the right end of the piston chamber, the right end of the adjustment chamber is fixedly connected to the left end of the limit chamber, and the first bevel gears are all engaged with the spiral grooves on the outer periphery of the pull shaft.

[0013] Preferably, the outer periphery of the driving rod is rotatably connected to the inside of the connecting chamber. One end of the connecting chamber close to the pull shaft is fixedly connected to the middle of the upper and lower ends of the piston chamber, and the outer periphery of the rotating chamber is fixedly connected to the upper and lower ends of the outer periphery of the pump housing.

[0014] A method for using a metering pump applied to the production of polytetrafluoroethylene, applied to the metering pump for the production of polytetrafluoroethylene described in any one of the above, includes the following steps: S1. First, after adjusting the position of the wedge block in the cam disc through the turntable, start the eccentric motor. The piston seat slides to the right inside the piston chamber, reducing the pressure in the pump body mechanism, so that the polytetrafluoroethylene raw material enters the pump housing from the feed port. At the same time, through the cooperation of the ratchet and pawl at the upper end, the first bevel gear at the upper end cannot rotate, so that the piston seat rotates through the cooperation of the spiral groove on the outer periphery of the pull shaft and the first bevel gear at the upper end, and then the raw material entering the piston chamber is in a rotating state. And the pull shaft drives the gear disc to rotate through the cooperation of the first bevel gear and the second bevel gear at the lower end and the driving rod, and finally drives the lower feed box to rotate through the cooperation of the first magnet and the second magnet, so that the raw material spirally entering the feed box through the lower inclined opening is conveyed to the inside of the pump housing while maintaining a rotating state; S2. When the piston seat moves to the left inside the piston chamber, through the cooperation of the ratchet and pawl at the lower end, the first bevel gear at the lower end no longer rotates, so that the piston seat still maintains the original rotation direction inside the piston chamber, and then the raw material entering the piston chamber maintains the original state of rotation. Similarly, the upper gear disc drives the upper feed box to rotate through the cooperation of the first magnet and the second magnet, so that the raw material entering the pump housing still maintains the original rotating state and is discharged from the pump housing through the discharge port, completing the pumping of the polytetrafluoroethylene raw material.

[0015] The beneficial effects of the metering pump and method for producing polytetrafluoroethylene provided by the present invention are: 1. When the piston seat moves to the right, the ratchet pawl at the upper end locks the ratchet wheel it meshes with. Through the cooperation of the helical gear 1 at the upper end and the helical groove on the outer periphery of the draw shaft, the helical blade at the left end of the piston seat is driven to rotate, making the raw materials entering the inside of the piston chamber in a rotating state. Conversely, when the piston seat moves to the left, the ratchet pawl at the lower end locks the ratchet wheel it meshes with, causing the helical gear 1 at the lower end to stop rotating. During the process of the draw shaft driving the piston seat to move left and right inside the piston chamber, it can only rotate in one direction, thus keeping the raw materials entering the inside of the piston chamber in a rotating state, preventing the raw materials from adhering and remaining on the inner wall of the piston chamber due to pressure changes during material extraction and feeding. This avoids the wear of the piston seat and the sealing ring caused by friction between the piston seat and the raw materials remaining on the inner wall of the piston chamber, extends the maintenance interval of the metering pump, and reduces the possibility of excessive amplitude during the use of the metering pump due to friction between the piston seat and the raw materials remaining on the inner wall of the piston chamber.

[0016] 2. When the piston seat moves to the right, the helical gear 1 at the upper end is locked, and the helical groove on the outer periphery of the draw shaft drives the helical gear 2 to rotate through the helical gear 1. Then, the spur gear is driven to rotate through the driving rod at the lower end, and further, the magnet 1 inside the lower end gear disc cooperates with the magnet 2 on the outer periphery of the feed box to drive the lower feed box to rotate inside the pump housing. Before the raw materials enter the inside of the lower feed box through the feed port, the raw materials are first made to be in a rotating state through the inclined opening at the lower end. After entering the inside of the lower feed box, since the lower feed box is in a rotating state, through the uniformly distributed helical ports at the upper end of the lower feed box, the raw materials remain in a rotating state when entering the inside of the pump housing. Conversely, when the piston seat moves to the left, the upper feed box rotates. At the same time, the helical gear 1 at the lower end is locked, so that the raw materials pumped out of the inside of the pump housing still rotate in the same direction and are discharged through the upper discharge port, thus realizing that during the pumping process of the raw materials, they always rotate in the same direction inside the pump housing. Finally, during the pumping process of the raw materials, they will not adhere and remain on the inner wall of the pump housing due to pressure changes inside the pump housing, which affects the subsequent pumping of polytetrafluoroethylene raw materials.

[0017] 3. When the raw materials inside the piston chamber are being pumped in a rotating manner, it will further increase the rotational eddy current of the raw materials inside the pump housing during the pumping process, further ensuring that the raw materials will not adhere and remain on the inner wall of the pump housing due to pressure changes inside the pump housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Rear perspective three-dimensional schematic diagram of a metering pump and method for producing polytetrafluoroethylene provided by this application; Figure 2 Front perspective three-dimensional schematic diagram of a metering pump and method for producing polytetrafluoroethylene provided by this application; Figure 3 Front perspective sectional schematic diagram of a metering pump and method for producing polytetrafluoroethylene provided by this application; Figure 4 First front perspective sectional partial enlarged schematic diagram of a metering pump and method for producing polytetrafluoroethylene provided by this application; Figure 5 Second front perspective sectional partial enlarged schematic diagram of a metering pump and method for producing polytetrafluoroethylene provided by this application; Figure 6 Third front perspective sectional partial enlarged schematic diagram of a metering pump and method for producing polytetrafluoroethylene provided by this application.

[0020] In the figure: 1. Driving mechanism; 11. Driving chamber; 12. Eccentric motor; 13. Worm; 14. Turbine; 15. First driving shaft; 16. Wedge block; 17. Rotating seat; 18. Threaded rod; 19. Threaded seat; 110. Turntable; 111. Cam disc; 112. Second driving shaft; 2. Pumping mechanism; 21. Limiting chamber; 22. Universal coupling; 23. Pulling shaft; 24. Spiral groove; 25. Piston seat; 26. Sealing ring; 27. Spiral blade; 28. Piston chamber; 3. Adjusting mechanism; 31. Adjusting chamber; 32. First helical gear; 33. Second helical gear; 34. Driving rod; 35. Straight gear; 36. Tooth disc; 37. First magnetic block; 38. Connecting chamber; 39. Ratchet; 310. Pawl; 311. Connecting rod; 312. First spring; 313. Rotating chamber; 4. Pump body mechanism; 41. Pump housing; 42. Feed inlet; 43. Discharge outlet; 44. Oblique opening; 45. Feed box; 46. Spiral opening; 47. Second spring; 48. Sealing ball; 49. Second magnetic block. Detailed implementation manners

[0021] The following combines the specification drawings and embodiments to make a more detailed description of the specific implementation manners of the present invention. The following embodiments are only used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] As Figures 1 - 6 shown, this embodiment proposes a metering pump for producing polytetrafluoroethylene, including: The pump body mechanism 4 is used to pump the polytetrafluoroethylene raw material from the storage tank to the machine in the next processing procedure; A pumping mechanism 2 for changing the pressure inside the pump body mechanism 4 to achieve pumping of polytetrafluoroethylene raw materials; An adjustment mechanism 3 for keeping polytetrafluoroethylene in a rotating state inside the pump body mechanism 4 during the pumping process; A driving mechanism 1 for driving the pumping mechanism 2 to change the pressure inside the pump body mechanism 4; The pumping mechanism 2 includes a limit bin 21 and a piston bin 28. A universal coupling 22 is slidably connected inside the limit bin 21. The left end of the universal coupling 22 is fixedly connected to a pull shaft 23. Helical grooves 24 are evenly distributed on the outer periphery of the pull shaft 23. The left end of the helical groove 24 is fixedly connected to a piston seat 25. A sealing ring 26 is fixedly connected to the outer periphery of the piston seat 25. The left end of the piston seat 25 is fixedly connected to a helical blade 27. The outer peripheries of the piston seat 25 and the sealing ring 26 are both slidably connected inside the piston bin 28.

[0023] In this embodiment, the driving mechanism 1 includes a driving bin 11. A eccentric motor 12 is fixedly connected to the lower side of the front end of the driving bin 11. The rear driving end of the eccentric motor 12 is fixedly connected to a worm 13. The worm 13 is meshed with a turbine 14. A driving shaft one 15 is fixedly connected to the middle of the turbine 14. A cam disc 111 is fixedly connected to the upper end of the driving shaft one 15. A wedge block 16 is slidably connected inside the upper opening of the cam disc 111. The upper end of the wedge block 16 is fixedly connected to a rotating seat 17. The upper end of the rotating seat 17 is rotatably connected to a threaded rod 18 through a bearing. The middle outer periphery of the threaded rod 18 is rotatably connected to a threaded seat 19. The upper end of the threaded rod 18 is fixedly connected to a turntable 110. The left end inside the cam disc 111 is rotatably connected to a driving shaft two 112.

[0024] In this embodiment, the left end of the driving bin 11 is fixedly connected to the right end of the limit bin 21. The front and rear ends of the worm 13 are rotatably connected to the middle lower parts of the front and rear sides inside the driving bin 11. The lower end of the driving shaft one 15 is rotatably connected to the middle of the inner bottom wall of the driving bin 11 through a bearing.

[0025] In this embodiment, the lower end of the threaded seat 19 is fixedly connected to the middle of the upper end of the driving bin 11. The left end of the driving shaft two 112 is fixedly connected to the right end of the universal coupling 22.

[0026] Specifically, rotate the turntable 110. Through the cooperation of the threaded seat 19 and the threaded rod 18, drive the wedge block 16 at the lower end of the rotating seat 17 to move downward or upward inside the cam disc 111, thereby adjusting the metering of the metering pump for conveying polytetrafluoroethylene raw materials. Start the eccentric motor 12 to drive the turbine 14 to rotate through the worm 13. Then, through the cooperation of the first drive shaft 15 and the wedge block 16, and further through the second drive shaft 112, drive the universal coupling 22 to reciprocate inside the limit bin 21. Drive the piston seat 25 to reciprocate inside the piston chamber 28 through the pull-out shaft 23. When the piston seat 25 moves to the right inside the piston chamber 28, the sealing ball 48 inside the lower spiral opening 46 moves upward, and the sealing ball 48 inside the upper feed box 45 remains stationary. The raw material enters the inside of the lower feed box 45 from the feed port 42 and enters the inside of the pump housing 41 through the lower spiral opening 46. When the piston seat 25 moves to the left inside the piston chamber 28, the sealing ball 48 inside the lower feed box 45 resets, and the sealing ball 48 inside the upper feed box 45 moves upward. The raw material enters the inside of the discharge port 43 from the upper spiral opening 46 and is conveyed to the machine in the next processing procedure, completing the conveyance of the polytetrafluoroethylene raw material. When the piston seat 25 moves to the right, the upper pawl 310 locks the ratchet wheel 39 engaged with it. Through the cooperation of the upper first helical gear 32 and the spiral groove 24 on the outer periphery of the pull-out shaft 23, drive the spiral blade 27 at the left end of the piston seat 25 to rotate, making the raw material entering the inside of the piston chamber 28 in a rotating state. On the contrary, when the piston seat 25 moves to the left, the lower pawl 310 locks the ratchet wheel 39 engaged with it, making the lower first helical gear 32 stop rotating. When the pull-out shaft 23 drives the piston seat 25 to move left and right inside the piston chamber 28, it can only rotate in one direction, thereby making the raw material entering the inside of the piston chamber 28 remain in a rotating state, preventing the raw material from adhering and remaining on the inner wall of the piston chamber 28 due to the pressure change during the suction and feeding processes, resulting in the friction between the piston seat 25 and the raw material remaining on the inner wall of the piston chamber 28 and causing wear of the piston seat 25 and the sealing ring 26. This extends the maintenance interval of the metering pump and reduces the possibility of excessive amplitude of the metering pump during use due to the friction between the piston seat 25 and the raw material remaining on the inner wall of the piston chamber 28.

[0027] In this embodiment, the pump body mechanism 4 includes a pump housing 41. The lower end of the pump housing 41 is flange-connected with a feed port 42, and the upper end of the pump housing 41 is flange-connected with a discharge port 43. Oblique openings 44 are fixedly connected inside both the feed port 42 and the discharge port 43. The upper and lower ends inside the pump housing 41 are rotatably connected with feed boxes 45. The upper ends of the feed boxes 45 are evenly provided with spiral openings 46. Second springs 47 are fixedly connected to the inner tops of the feed boxes 45. The lower ends of the second springs 47 are fixedly connected with sealing balls 48. Second magnetic blocks 49 are evenly distributed on the outer peripheries of the feed boxes 45.

[0028] In this embodiment, the outer periphery of the sealing ball 48 is slidably connected to the lower inner end of the feed box 45, and the middle right end of the pump housing 41 is fixedly connected to the left end of the piston chamber 28.

[0029] In this embodiment, the adjusting mechanism 3 includes an adjusting chamber 31 and a rotating chamber 313. At the upper and lower ends of the middle part inside the adjusting chamber 31, there are rotatably connected first helical gears 32. The first helical gears 32 are all meshed with second helical gears 33. In the middle of the second helical gears 33, there are fixedly connected driving rods 34. At the left ends of the driving rods 34, there are fixedly connected spur gears 35. The spur gears 35 are all meshed with a toothed disc 36. Inside the toothed disc 36, there are evenly distributed first magnetic blocks 37. The outer peripheries of the toothed disc 36 are rotatably connected inside the rotating chamber 313. At the upper and lower sides of the left end of the adjusting chamber 31, there are fixedly connected connecting chambers 38. Inside the connecting chambers 38, there are rotatably connected ratchets 39. In the middle of the ratchets 39, there are fixedly connected to the outer periphery of the middle right end of the driving rods 34. The ratchets 39 are all meshed with pawls 310. At the ends of the pawls 310 away from the ratchets 39, there are fixedly connected connecting rods 311. Around the outer peripheries of the connecting rods 311, there are sleeved first springs 312.

[0030] In this embodiment, the left end of the adjusting chamber 31 is fixedly connected to the right end of the piston chamber 28, and the right end of the adjusting chamber 31 is fixedly connected to the left end of the limiting chamber 21. The first helical gears 32 are all meshed with the spiral grooves 24 on the outer periphery of the pull shaft 23.

[0031] In this embodiment, the outer peripheries of the driving rods 34 are rotatably connected inside the connecting chambers 38. One end of the connecting chambers 38 close to the pull shaft 23 is fixedly connected to the middle of the upper and lower ends of the piston chamber 28. The outer peripheries of the rotating chambers 313 are fixedly connected to the upper and lower ends of the outer periphery of the pump housing 41.

[0032] Specifically, when the piston seat 25 moves to the right, the helical gear one 32 at the upper end is locked, and the helical groove 24 on the outer periphery of the draw shaft 23 drives the helical gear two 33 to rotate through the helical gear one 32, and then drives the spur gear 35 to rotate through the drive rod 34 at the lower end. Furthermore, through the cooperation between the magnet one 37 inside the lower end gear disc 36 and the magnet two 49 on the outer periphery of the feed box 45, the lower end feed box 45 is driven to rotate inside the pump housing 41. Before the raw material enters the inside of the lower end feed box 45 through the feed port 42, the raw material is first rotated through the inclined opening 44 at the lower end. After entering the inside of the lower end feed box 45, since the lower end feed box 45 is in a rotating state, through the spiral ports 46 evenly distributed at the upper end of the lower end feed box 45, the raw material remains in a rotating state when entering the inside of the pump housing 41. On the contrary, when the piston seat 25 moves to the left, the upper end feed box 45 rotates. At the same time, the helical gear one 32 at the lower end is locked, so that the raw material pumped out of the inside of the pump housing 41 still rotates in the same direction and is discharged through the discharge port 43 at the upper end, thereby realizing that during the pumping process of the raw material, it always rotates in the same direction inside the pump housing 41. Finally, during the pumping process of the raw material, it will not adhere and remain on the inner wall of the pump housing 41 due to the pressure change inside the pump housing 41, resulting in affecting the subsequent pumping of the polytetrafluoroethylene raw material.

[0033] A method for using a metering pump applied to the production of polytetrafluoroethylene, which is applied to a metering pump for the production of polytetrafluoroethylene in any one of the above, and includes the following steps: S1. First, after adjusting the position of the wedge block 16 inside the cam disc 111 through the turntable 110, start the eccentric motor 12, and slide the piston seat 25 to the right inside the piston chamber 28 to reduce the pressure in the pump body mechanism 4, so that the polytetrafluoroethylene raw material enters the pump housing 41 from the feed port 42. At the same time, through the cooperation between the ratchet 39 at the upper end and the ratchet pawl 310, the helical gear one 32 at the upper end cannot rotate, so that the piston seat 25 rotates through the cooperation between the helical groove 24 on the outer periphery of the draw shaft 23 and the helical gear one 32 at the upper end, and then the raw material entering the inside of the piston chamber 28 is in a rotating state. Moreover, through the cooperation of the lower end helical gear one 32, the helical gear two 33 and the drive rod 34, the draw shaft 23 drives the gear disc 36 to rotate through the spur gear 35 at the lower end. Finally, through the cooperation between the magnet one 37 and the magnet two 49, the lower end feed box 45 is driven to rotate, so that the raw material spirally entering the inside of the feed box 45 through the inclined opening 44 at the lower end is transported to the inside of the pump housing 41 while maintaining a rotating state; S2. When the piston seat 25 moves leftward inside the piston chamber 28, through the cooperation of the ratchet wheel 39 at the lower end and the pawl 310, the first helical gear 32 at the lower end stops rotating, so that the piston seat 25 still maintains its original rotation direction inside the piston chamber 28. Further, the raw material entering the inside of the piston chamber 28 rotates while maintaining its original state. Similarly, the upper gear disk 36 drives the upper feed box 45 to rotate through the cooperation of the first magnet 37 and the second magnet 49, so that the raw material entering the inside of the pump housing 41 is discharged from the pump housing 41 through the discharge port 43 while still maintaining its original rotating state, completing the pumping of the polytetrafluoroethylene raw material.

[0034] Specifically, during the rotary pumping of the raw material inside the piston chamber 28, the rotational eddy current of the raw material inside the pump housing 41 during pumping will be further increased, further ensuring that the raw material will not adhere and remain on the inner wall of the pump housing 41 when the internal pressure of the pump housing 41 changes.

[0035] Working principle: First, rotate the turntable 110. Through the cooperation of the threaded seat 19 and the threaded rod 18, drive the wedge block 16 at the lower end of the rotating seat 17 to move downward or upward inside the cam disc 111, thereby adjusting the metering of the polytetrafluoroethylene raw material conveyed by the metering pump. Start the eccentric motor 12 to drive the turbine 14 to rotate through the worm 13. Then, through the cooperation of the first drive shaft 15 and the wedge block 16, and further through the second drive shaft 112, drive the universal coupling 22 to reciprocate inside the limit bin 21. Drive the piston seat 25 to reciprocate inside the piston chamber 28 through the draw shaft 23. When the piston seat 25 moves to the right inside the piston chamber 28, the sealing ball 48 inside the lower spiral port 46 moves upward, and the sealing ball 48 inside the upper feed box 45 remains stationary. The raw material enters the inside of the lower feed box 45 from the feed port 42 and enters the inside of the pump housing 41 through the lower spiral port 46. When the piston seat 25 moves to the left inside the piston chamber 28, the sealing ball 48 inside the lower feed box 45 resets, and the sealing ball 48 inside the upper feed box 45 moves upward. The raw material enters the inside of the discharge port 43 from the upper spiral port 46 and is conveyed to the machine in the next processing procedure, completing the conveyance of the polytetrafluoroethylene raw material. When the piston seat 25 moves to the right, the upper pawl 310 locks the ratchet 39 meshed with it. Through the cooperation of the upper first helical gear 32 and the spiral groove 24 on the outer periphery of the draw shaft 23, drive the spiral blade 27 at the left end of the piston seat 25 to rotate, making the raw material entering the inside of the piston chamber 28 in a rotating state. On the contrary, when the piston seat 25 moves to the left, the lower pawl 310 locks the ratchet 39 meshed with it, making the lower first helical gear 32 stop rotating. When the draw shaft 23 drives the piston seat 25 to move left and right inside the piston chamber 28, it can only rotate in one direction, thereby making the raw material entering the inside of the piston chamber 28 remain in a rotating state, so that the raw material will not adhere and remain on the inner wall of the piston chamber 28 due to the pressure change during the material extraction and feeding, resulting in the wear of the piston seat 25 and the sealing ring 26 due to the friction between the piston seat 25 and the raw material remaining on the inner wall of the piston chamber 28. This extends the maintenance interval of the metering pump and at the same time reduces the possibility of the metering pump having too large an amplitude during use due to the friction between the piston seat 25 and the raw material remaining on the inner wall of the piston chamber 28. When the piston seat 25 moves to the right, the upper first helical gear 32 is locked, and the spiral groove 24 on the outer periphery of the draw shaft 23 drives the second helical gear 33 to rotate through the first helical gear 32. Then, drive the spur gear 35 to rotate through the lower drive rod 34. Further, through the cooperation of the magnet 37 inside the lower gear disc 36 and the magnet 49 on the outer periphery of the feed box 45, drive the lower feed box 45 to rotate inside the pump housing 41. Before the raw material enters the inside of the lower feed box 45 through the feed port 42, first make the raw material in a rotating state through the lower inclined opening 44. After entering the inside of the lower feed box 45, since the lower feed box 45 is in a rotating state,Then, through the spiral openings 46 evenly distributed at the upper end of the lower feed box 45, the raw materials maintain a rotating state when entering the interior of the pump housing 41. Conversely, when the piston seat 25 moves to the left, the upper feed box 45 rotates. At the same time, the lower bevel gear 32 is locked, so that the raw materials pumped out of the interior of the pump housing 41 still maintain the same-direction rotation and are discharged through the upper discharge port 43. Thus, during the pumping process of the raw materials, they always maintain a rotation with an unchanged direction inside the pump housing 41. Finally, during the pumping process of the raw materials, they will not adhere and remain on the inner wall of the pump housing 41 due to the pressure change inside the pump housing 41, which would otherwise affect the subsequent pumping of the polytetrafluoroethylene raw materials. Moreover, during the rotating pumping process of the raw materials inside the piston chamber 28, it will further increase the rotational eddy current of the raw materials inside the pump housing 41 during the pumping process, further ensuring that the raw materials will not adhere and remain on the inner wall of the pump housing 41 when the pressure inside the pump housing 41 changes.

[0036] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered within the scope of the claims of the present invention.

Claims

1. A metering pump used in the production of polytetrafluoroethylene, characterized in that: include: A pump mechanism (4) is used to pump the polytetrafluoroethylene raw material from the storage tank to the machine for the next processing step; A pumping mechanism (2) is used to change the pressure inside the pump body mechanism (4) to achieve pumping of polytetrafluoroethylene raw materials; An adjustment mechanism (3) is used to keep the polytetrafluoroethylene in a rotating state inside the pump body mechanism (4) during the pumping process; A driving mechanism (1) for driving a pumping mechanism (2) to change the pressure inside a pump body mechanism (4); The pumping mechanism (2) comprises a limit chamber (21) and a piston chamber (28); the limit chamber (21) is slidably connected to a universal coupling (22) inside; the left end of the universal coupling (22) is fixedly connected to a pull-out shaft (23); the outer circumference of the pull-out shaft (23) is evenly distributed with spiral grooves (24); the left end of the spiral groove (24) is fixedly connected to a piston seat (25); the outer circumference of the piston seat (25) is fixedly connected to a sealing ring (26); the left end of the piston seat (25) is fixedly connected to a spiral leaf (27); the outer circumferences of the piston seat (25) and the sealing ring (26) are both slidably connected to the inside of the piston chamber (28); The adjustment mechanism (3) comprises an adjustment bin (31) and a rotating bin (313); the upper and lower ends of the inner middle portion of the adjustment bin (31) are rotatably connected to a bevel gear 1 (32); the bevel gear 1 (32) is meshingly connected to a bevel gear 2 (33); the middle portion of the bevel gear 2 (33) is fixedly connected to a driving rod (34); the left end of the driving rod (34) is fixedly connected to a spur gear (35); the spur gear (35) is meshingly connected to a toothed disc (36); the interior of the toothed disc (36) is evenly distributed with magnetic blocks 1 (37); the toothed disc (36) ) are rotatably connected to the inside of the rotating bin (313); the upper and lower sides of the left end of the adjustment bin (31) are fixedly connected to the connecting bin (38); the inside of the connecting bin (38) is rotatably connected to a ratchet (39); the middle part of the ratchet (39) is fixedly connected to the outer periphery of the right end of the middle part of the driving rod (34); the ratchet (39) is meshedly connected to a pawl (310); the end of the pawl (310) away from the ratchet (39) is fixedly connected to a connecting rod (311); and the outer periphery of the connecting rod (311) is sleeved with a spring 1 (312).

2. A metering pump for producing polytetrafluoroethylene according to claim 1, characterized in that: The driving mechanism (1) comprises a driving bin (11), the front lower side of the driving bin (11) is fixedly connected to an eccentric motor (12), the rear driving end of the eccentric motor (12) is fixedly connected to a worm (13), the worm (13) is meshingly connected to a turbine (14), the middle of the turbine (14) is fixedly connected to a driving shaft 1 (15), the upper end of the driving shaft 1 (15) is fixedly connected to a cam plate (111), a wedge block (16) is slidably connected to the interior of the upper end opening of the cam plate (111), the upper end of the wedge block (16) is fixedly connected to a rotating seat (17), the upper end of the rotating seat (17) is rotatably connected to a threaded rod (18) via a bearing, the middle outer periphery of the threaded rod (18) is rotatably connected to a threaded seat (19), the upper end of the threaded rod (18) is fixedly connected to a rotating disk (110), and the left end of the cam plate (111) is rotatably connected to a driving shaft 2 (112).

3. A metering pump for producing polytetrafluoroethylene according to claim 2, characterized in that: The left end of the driving bin (11) is fixedly connected to the right end of the limiting bin (21), the front and rear ends of the worm (13) are both rotatably connected to the middle and lower parts of the front and rear inner sides of the driving bin (11), and the lower end of the driving shaft 1 (15) is rotatably connected to the middle part of the inner bottom wall of the driving bin (11) via a bearing.

4. A metering pump for producing polytetrafluoroethylene according to claim 2, characterized in that: The lower end of the threaded seat (19) is fixedly connected to the middle of the upper end of the drive chamber (11), and the left end of the second drive shaft (112) is fixedly connected to the right end of the universal coupling (22).

5. A metering pump for producing polytetrafluoroethylene according to claim 1, characterized in that: The pump body mechanism (4) comprises a pump casing (41), the lower end flange of the pump casing (41) is connected to a feed port (42), the upper end flange of the pump casing (41) is connected to a discharge port (43), the insides of the feed port (42) and the discharge port (43) are fixedly connected to oblique openings (44), the upper and lower ends of the inside of the pump casing (41) are rotatably connected to a feed box (45), the upper end of the feed box (45) is evenly provided with spiral openings (46), the inner top of the feed box (45) is fixedly connected to a second spring (47), the lower end of the second spring (47) is fixedly connected to a sealing ball (48), and the outer periphery of the feed box (45) is evenly distributed with second magnetic blocks (49).

6. A metering pump for producing polytetrafluoroethylene according to claim 5, characterized in that: The outer periphery of the sealing ball (48) is slidably connected to the inner lower end of the feed box (45), and the middle portion of the right end of the pump housing (41) is fixedly connected to the left end of the piston chamber (28).

7. A metering pump for producing polytetrafluoroethylene according to claim 5, characterized in that: The left end of the adjustment chamber (31) is fixedly connected to the right end of the piston chamber (28), the right end of the adjustment chamber (31) is fixedly connected to the left end of the limit chamber (21), and the bevel gear 1 (32) is meshed with the spiral groove (24) on the outer periphery of the pulling shaft (23).

8. A metering pump for producing polytetrafluoroethylene according to claim 5, characterized in that: The outer periphery of the driving rod (34) is rotatably connected to the interior of the connecting chamber (38), one end of the connecting chamber (38) close to the pulling shaft (23) is fixedly connected to the middle of the upper and lower ends of the piston chamber (28), and the outer periphery of the rotating chamber (313) is fixedly connected to the upper and lower ends of the outer periphery of the pump housing (41).

9. A method for using a metering pump used in the production of polytetrafluoroethylene, applied to a metering pump used in the production of polytetrafluoroethylene as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. First, the position of the wedge block (16) inside the cam plate (111) is adjusted by the turntable (110), and then the eccentric motor (12) is started. The piston seat (25) slides rightward inside the piston chamber (28) to reduce the pressure in the pump body mechanism (4), so that the polytetrafluoroethylene raw material enters the pump housing (41) from the feed port (42). At the same time, the upper end ratchet (39) and the ratchet pawl (310) cooperate, and the upper end bevel gear 1 (32) cannot rotate, so that the piston seat (25) is connected to the upper end through the spiral groove (24) on the outer periphery of the pulling shaft (23). The helical gear 1 (32) rotates in cooperation, thereby causing the raw material entering the piston chamber (28) to be in a rotating state, and the pulling shaft (23) drives the toothed disc (36) to rotate through the cooperation of the helical gear 1 (32) and the helical gear 2 (33) at the lower end and the driving rod (34) through the spur gear (35) at the lower end, and finally drives the feed box (45) at the lower end to rotate through the cooperation of the magnetic block 1 (37) and the magnetic block 2 (49), so that the raw material spirally entering the feed box (45) through the oblique opening (44) at the lower end is kept in a rotating state and transported to the inside of the pump housing (41); S2. When the piston seat (25) moves to the left inside the piston chamber (28), the ratchet wheel (39) and the pawl (310) at the lower end cooperate to make the bevel gear 1 (32) at the lower end stop rotating, so that the piston seat (25) still maintains the original direction of rotation inside the piston chamber (28), thereby making the raw material entering the piston chamber (28) rotate in the original state. Similarly, the toothed disc (36) at the upper end drives the feed box (45) at the upper end to rotate through the cooperation of the magnetic block 1 (37) and the magnetic block 2 (49), so that the raw material entering the pump housing (41) still maintains the original rotation state and is discharged from the pump housing (41) through the discharge port (43), thereby completing the pumping of the polytetrafluoroethylene raw material.

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