阅读说明：本技术 一种无尘加注头 (Dustless filling head ) 是由 金迁 于 2020-07-08 设计创作，主要内容包括：本发明属于液体灌装加注领域,尤其涉及一种无尘加注头,它包括盖子机构、除尘加注机构,其中盖子机构与储液罐螺纹配合,除尘加注机构通过与盖子机构的配合向储液罐内加注液体；本发明通过除尘加注机构与盖子机构的配合在盖子机构被打开前对附着于盖子机构中柱塞与罐盖之间的缝隙附着的灰尘进行有效清理,防止积存于柱塞与罐盖之间缝隙的灰尘在盖子机构打开后落入储液罐而对注入储液罐内的灌装液形成污染,从而保证液体灌装质量。(The invention belongs to the field of liquid filling and filling, and particularly relates to a dust-free filling head which comprises a cover mechanism and a dust-removing filling mechanism, wherein the cover mechanism is in threaded fit with a liquid storage tank, and the dust-removing filling mechanism is matched with the cover mechanism to fill liquid into the liquid storage tank; according to the invention, through the cooperation of the dust removal filling mechanism and the cover mechanism, dust attached to a gap between the plunger and the cover in the cover mechanism is effectively cleaned before the cover mechanism is opened, and the dust accumulated in the gap between the plunger and the cover is prevented from falling into the liquid storage tank after the cover mechanism is opened to pollute the filling liquid filled in the liquid storage tank, so that the liquid filling quality is ensured.)

1. A dustless filling head which characterized in that: the dust removal filling mechanism is matched with the liquid storage tank through threads, and liquid is filled into the liquid storage tank through the matching of the dust removal filling mechanism and the cover mechanism;

the cover mechanism comprises a cover, a plunger, a sealing ring B and a spring A, wherein the plunger for opening and closing the circular groove A is matched in the circular groove A in the middle of the cover mechanism; when the circular groove A is closed by the plunger, the outer conical surface on the plunger is in sealing fit with the inner conical surface at the lower end of the circular groove A; a spring A for resetting the plunger is arranged between the plunger and the tank cover; an annular groove A formed in the inner wall of the circular groove A is communicated with the upper end face of the tank cover, and a sealing ring B is arranged at the bottom of the annular groove A;

the dust removal filling mechanism comprises a connecting cylinder, a guide pillar, a spring B, a protective cover, a ring sleeve A, a spring C, a cylinder, a sliding sleeve, a sliding rod, a spring D, a scraper, a winding wheel and a thin steel wire, wherein a circular groove C is formed in the middle of the lower end of the connecting cylinder, and the guide pillar is axially, hermetically and slidably matched in the circular groove D at the top of the circular groove C; the lower end of the connecting cylinder is matched with the sealing ring B; a spring B for resetting the guide post is nested on the guide post; a conical protective cover is arranged on the guide post and vertically moves in the circular groove C along with the guide post; a ring sleeve A is circumferentially rotated on the guide post and axially matched in a sliding manner, and the ring sleeve A is positioned below the protective cover; two spiral blocks symmetrically arranged on the guide post slide in two spiral grooves on the inner wall of the ring sleeve A; a spring C for resetting the ring sleeve A is nested on the guide post; a cylinder is arranged on the ring sleeve A, and a plurality of sliding sleeves are uniformly arranged at the lower end of the cylinder in the circumferential direction; a sliding rod slides in each sliding sleeve along the radial direction of the guide pillar, and a spring D for resetting the sliding rod is nested on the sliding rod; one end of the sliding rod is provided with an arc-shaped scraper matched with the inner wall of the sealing ring B, the inner wall of the circular groove A and an annular area of the upper end surface of the plunger close to the inner wall of the circular groove A; a winding wheel axially slides on the guide post, and a plurality of thin steel wires connected with the slide bars one by one are wound on the winding wheel in the same direction; the liquid inlet hole on the inner wall of the circular groove C is communicated with a liquid source through a liquid inlet pipe;

the lower end of the guide post is matched with a circular groove B in the middle of the upper end face of the plunger.

2. A dust-free fill head as defined in claim 1, wherein: a ring groove B is formed in the outer conical surface, and a sealing ring A matched with the inner conical surface is arranged in the ring groove B; a ring plate A with the same central axis is arranged in the tank cover through a plurality of supporting rods which are uniformly distributed in the axial direction; a plurality of guide rods A are axially and uniformly arranged at the lower end of the plunger, and the guide rods A axially slide in guide grooves A on the ring plate A; the spring A is nested at the outer sides of the guide rods A; one end of the spring A is connected with the plunger, and the other end of the spring A is connected with the annular plate A.

3. A dust-free fill head as defined in claim 1, wherein: two ring grooves C are formed in the inner wall of the circular groove D, and a sealing ring C matched with the guide pillar is arranged in each ring groove C; a ring plate B is arranged at the upper end of the guide post, and a spring B nested on the guide post is positioned between the ring plate B and the connecting cylinder; one end of the spring B is connected with the connecting cylinder, and the other end of the spring B is connected with the annular plate B; two guide rods B are symmetrically arranged on the ring plate B and respectively axially slide in two guide grooves B on the connecting cylinder; two ring grooves D are formed in the inner wall of each guide groove B, and a sealing ring D matched with the corresponding guide rod B is mounted in each ring groove D; a ring sleeve B is rotatably matched on the guide post, and a ring sleeve C arranged on the guide post rotates in a ring groove E on the inner wall of the ring sleeve B; two guide blocks are symmetrically arranged on the inner wall of the winding wheel and respectively slide in two guide grooves C on the guide columns; the spring D nested on the sliding rod is positioned in the annular groove F on the inner wall of the corresponding sliding sleeve; one end of the spring D is connected with the inner wall of the corresponding ring groove F, and the other end of the spring D is connected with a tension spring ring arranged on the corresponding sliding rod.

4. A dust-free fill head as defined in claim 1, wherein: the diameter of the circular groove C is equal to the inner diameter of the sealing ring B, and the inner diameter of the sealing ring B is equal to the diameter of the circular groove A.

5. A dust-free fill head as defined in claim 1, wherein: the scraping plate is provided with a sharp corner which is matched with the clearance between the inner wall of the circular groove C and the plunger; the scraper is coated with electrostatic dust collector.

Technical Field

The invention belongs to the field of liquid filling and filling, and particularly relates to a dust-free filling head.

Background

For filling toxic liquid or liquid which is easy to cause pollution, no leakage needs to be ensured in the filling process. In the prior art, a filling head is usually adopted to press down a plunger in a tank cover so as to fill liquid into a liquid storage tank. Because the upper end surface of the plunger is tightly pressed by the filling head, dust accumulated on the upper end surface of the plunger cannot fall into the liquid storage tank along with the plunger entering the liquid storage tank. However, dust deposited in the annular gap region between the plunger and the canister lid is carried into the reservoir, resulting in contamination of the liquid in the reservoir.

Based on the method for pressing down the plunger by the injection head in the prior art, the structure of the plunger is improved to prevent dust in the annular area between the plunger and the tank cover from entering the liquid storage tank.

The invention designs a dust-free filling head to solve the problems.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention discloses a dust-free filling head which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

A dust-free filling head comprises a cover mechanism and a dust removal filling mechanism, wherein the cover mechanism is in threaded fit with a liquid storage tank, and the dust removal filling mechanism fills liquid into the liquid storage tank through the cooperation with the cover mechanism.

The cover mechanism comprises a cover, a plunger, a sealing ring B and a spring A, wherein the plunger for opening and closing the circular groove A is matched in the circular groove A in the middle of the cover mechanism; when the circular groove A is closed by the plunger, the outer conical surface on the plunger is in sealing fit with the inner conical surface at the lower end of the circular groove A; a spring A for resetting the plunger is arranged between the plunger and the tank cover; an annular groove A formed in the inner wall of the circular groove A is communicated with the upper end face of the tank cover, and a sealing ring B is arranged at the bottom of the annular groove A.

The dust removal filling mechanism comprises a connecting cylinder, a guide pillar, a spring B, a protective cover, a ring sleeve A, a spring C, a cylinder, a sliding sleeve, a sliding rod, a spring D, a scraper, a winding wheel and a thin steel wire, wherein a circular groove C is formed in the middle of the lower end of the connecting cylinder, and the guide pillar is axially, hermetically and slidably matched in the circular groove D at the top of the circular groove C; the lower end of the connecting cylinder is matched with the sealing ring B; a spring B for resetting the guide post is nested on the guide post; the guide post is provided with a conical protective cover, and the protective cover vertically moves in the circular groove C along with the guide post. The conical protective cover increases the containing space of the filling liquid in the circular groove C, and simultaneously ensures that the filling liquid entering the circular groove C falls down to the periphery in the liquid storage tank under the guide of the conical protective cover so as to reduce the filling liquid residue on the plunger to the maximum extent. A ring sleeve A is circumferentially rotated on the guide post and axially matched in a sliding manner, and the ring sleeve A is positioned below the protective cover; two spiral blocks symmetrically arranged on the guide post slide in two spiral grooves on the inner wall of the ring sleeve A; a spring C for resetting the ring sleeve A is nested on the guide post; a cylinder is arranged on the ring sleeve A, and a plurality of sliding sleeves are uniformly arranged at the lower end of the cylinder in the circumferential direction; a sliding rod slides in each sliding sleeve along the radial direction of the guide pillar, and a spring D for resetting the sliding rod is nested on the sliding rod; one end of the sliding rod is provided with an arc-shaped scraper matched with the inner wall of the sealing ring B, the inner wall of the circular groove A and an annular area of the upper end surface of the plunger close to the inner wall of the circular groove A; a winding wheel axially slides on the guide post, and a plurality of thin steel wires connected with the slide bars one by one are wound on the winding wheel in the same direction; the liquid inlet hole on the inner wall of the circular groove C is communicated with a liquid source through a liquid inlet pipe. The sealing ring B is deformed under the extrusion of the connecting cylinder to form sealing between the connecting cylinder and the tank cover, so that the toxic or corrosive liquid filled into the liquid storage tank is prevented from leaking, and the surrounding ground environment is not polluted and the safety of operators is ensured.

The lower end of the guide post is matched with a circular groove B in the middle of the upper end face of the plunger.

As a further improvement of the technology, a ring groove B is formed on the outer conical surface, and a sealing ring A matched with the inner conical surface is arranged in the ring groove B; a ring plate A with the same central axis is arranged in the tank cover through a plurality of supporting rods which are uniformly distributed in the axial direction; a plurality of guide rods A are axially and uniformly arranged at the lower end of the plunger, and the guide rods A axially slide in guide grooves A on the ring plate A; the spring A is nested at the outer sides of the guide rods A; one end of the spring A is connected with the plunger, and the other end of the spring A is connected with the annular plate A. The cooperation of the guide groove A on the ring plate A and the guide rod A plays a role in positioning and guiding the axial movement of the plunger.

As a further improvement of the technology, two ring grooves C are formed in the inner wall of the circular groove D, and a sealing ring C matched with the guide pillar is installed in each ring groove C; a ring plate B is arranged at the upper end of the guide post, and a spring B nested on the guide post is positioned between the ring plate B and the connecting cylinder; one end of the spring B is connected with the connecting cylinder, and the other end of the spring B is connected with the annular plate B; two guide rods B are symmetrically arranged on the ring plate B, and the two guide rods B axially slide in two guide grooves B on the connecting cylinder respectively. The guide rod B is matched with the guide groove B to play a role in guiding the guide pillar relative to the axial sliding of the connecting cylinder; two ring grooves D are formed in the inner wall of each guide groove B, and a sealing ring D matched with the corresponding guide rod B is installed in each ring groove D. The matching of the sealing ring C and the guide pillar and the matching of the sealing ring D and the guide rod B prevent the filling liquid entering the circular groove C from leaking. A ring sleeve B is rotatably matched on the guide post, and a ring sleeve C arranged on the guide post rotates in a ring groove E on the inner wall of the ring sleeve B; two guide blocks are symmetrically arranged on the inner wall of the winding wheel and respectively slide in two guide grooves C on the guide columns. The matching of the guide groove C and the guide block plays a role in positioning and guiding the axial sliding of the winding wheel relative to the guide post. The spring D nested on the sliding rod is positioned in the annular groove F on the inner wall of the corresponding sliding sleeve; one end of the spring D is connected with the inner wall of the corresponding ring groove F, and the other end of the spring D is connected with a tension spring ring arranged on the corresponding sliding rod.

As a further improvement of the technology, the diameter of the circular groove C is equal to the inner diameter of the sealing ring B, and the inner diameter of the sealing ring B is equal to the diameter of the circular groove a, so that on one hand, dust is prevented from accumulating in the circular groove a, on the other hand, the dust accumulated on the sealing ring B is prevented from falling into the liquid storage tank along with the opening of the circular groove C by the plunger because of being covered by the connecting cylinder pressed on the sealing ring B, and the filling liquid in the liquid storage tank is prevented from being polluted by the dust.

As a further improvement of the technology, the scraper is provided with a sharp corner matched with the clearance between the inner wall of the circular groove C and the plunger so as to scrape and adsorb dust accumulated in the clearance between the plungers. The electrostatic dust collector is coated on the scraper, so that the scraper can effectively adsorb and clean dust accumulated in the place where the scraper passes through.

Compared with the traditional liquid filling head, the dust removing and filling mechanism is matched with the cover mechanism to effectively clean dust attached to a gap between the plunger and the cover in the cover mechanism before the cover mechanism is opened, so that the dust accumulated in the gap between the plunger and the cover is prevented from falling into the liquid storage tank after the cover mechanism is opened to pollute filling liquid filled in the liquid storage tank, and the liquid filling quality is ensured.

Meanwhile, the scraper in the invention can be used for absorbing and cleaning dust accumulated in a gap between the plunger and the tank cover, then retracting the protective cover and being covered and protected by the protective cover, so that the scraper, the sliding rod, the thin steel wire and the winding wheel are prevented from being damaged in overlooking when toxic or corrosive liquid is filled into the liquid storage tank, and the service lives of the scraper, the sliding rod, the thin steel wire and the winding wheel are prolonged. The invention has simple structure and better use effect.

Drawings

Fig. 1 is a schematic cross-sectional view of the lid mechanism in cooperation with the dust removing and filling mechanism.

FIG. 2 is a schematic cross-sectional view of the connection cylinder, the sealing ring B, the tank cover, the plunger, the scraper, the sliding rod, the winding wheel and the guide post.

FIG. 3 is a schematic sectional view of the connection cylinder, the seal ring B, the can lid, the plunger and the scraper.

FIG. 4 is a schematic cross-sectional view of the cap mechanism, the dust-removing filling mechanism and the liquid storage tank.

Fig. 5 is a schematic sectional view of the dust removing and filling mechanism.

FIG. 6 is a cross-sectional view of the connection cylinder, the guide post, the protection cap, the ring B, the spring C and the ring A.

FIG. 7 is a schematic bottom view of the combination of the winding wheel, the thin steel wire, the sliding rod, the sliding sleeve, the scraper and the connecting cylinder.

Fig. 8 is a schematic cross-sectional view of a connecting cylinder.

Fig. 9 is a schematic cross-sectional view of the ring plate B, guide bar B, and shield.

FIG. 10 is a schematic cross-sectional view of the guide rod engaged with the winding wheel.

Figure 11 is a cross-sectional view of the cuff B.

FIG. 12 is a schematic cross-sectional view of a screw block engaged with a screw groove.

FIG. 13 is a cross-sectional view of the fitting of the collar A, cylinder and sliding sleeves.

FIG. 14 is a schematic view of the squeegee from two viewing angles.

Fig. 15 is a schematic cross-sectional view of the lid mechanism and its cover.

Figure 16 is a schematic cross-sectional view of a can lid and its lid.

Fig. 17 is a schematic cross-sectional view of the plunger engaged with guide a.

Fig. 18 is a schematic view of the ring plate a.

Figure 19 is a schematic cross-sectional view of a sliding sleeve.

Number designation in the figures: 1. a cover mechanism; 2. a can lid; 3. a circular groove A; 4. a ring groove A; 5. an inner conical surface; 6. a plunger; 7. an outer conical surface; 8. a ring groove B; 9. a circular groove B; 10. a sealing ring A; 11. a seal ring B; 12. a guide rod A; 13. a spring A; 14. a support bar; 15. a ring plate A; 16. a guide groove A; 17. a dust removal filling mechanism; 18. a connecting cylinder; 19. a circular groove C; 20. a liquid inlet hole; 21. a circular groove D; 22. a ring groove C; 23. a guide groove B; 24. a ring groove D; 25. a liquid inlet pipe; 26. a guide post; 27. a seal ring C; 28. a spring B; 29. a ring plate B; 30. a guide rod B; 31. a seal ring D; 32. a protective cover; 33. a ring sleeve A; 34. a helical groove; 35. a screw block; 36. a spring C; 37. a ring sleeve B; 38. a ring groove E; 39. c, sleeving a ring sleeve; 40. a guide groove C; 41. a cylinder; 42. a sliding sleeve; 43. a ring groove F; 44. a slide bar; 45. a spring D; 46. a tension spring ring; 47. a squeegee; 48. sharp corners; 49. a winding wheel; 50. a guide block; 51. thin steel wires; 52. a liquid storage tank.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, 2 and 4, the dust removing and filling device comprises a cap mechanism 1 and a dust removing and filling mechanism 17, wherein the cap mechanism 1 is in threaded fit with a liquid storage tank 52, and the dust removing and filling mechanism 17 is matched with the cap mechanism 1 to fill liquid into the liquid storage tank 52.

As shown in fig. 15, the cover mechanism 1 comprises a can cover 2, a plunger 6, a sealing ring B11 and a spring a13, wherein as shown in fig. 1, 2 and 15, the plunger 6 for opening and closing the circular groove A3 is matched in a circular groove A3 in the middle of the mechanism of the can cover 2; as shown in fig. 4, 15 and 16, in the state that the circular groove A3 is closed by the plunger 6, the outer conical surface 7 on the plunger 6 is in sealing fit with the inner conical surface 5 at the lower end of the circular groove A3; a spring A13 for resetting the plunger 6 is arranged between the plunger 6 and the cover 2; an annular groove A4 formed on the inner wall of the circular groove A3 is communicated with the upper end face of the tank cover 2, and a sealing ring B11 is arranged at the bottom of the annular groove A4.

As shown in fig. 5, 6 and 7, the dust-removing and filling mechanism 17 includes a connecting cylinder 18, a guide post 26, a spring B28, a protective cover 32, a ring sleeve a33, a spring C36, a cylinder 41, a sliding sleeve 42, a sliding rod 44, a spring D45, a scraper 47, a winding wheel 49 and a thin steel wire 51, wherein as shown in fig. 6 and 8, a circular groove C19 is formed in the middle of the lower end of the connecting cylinder 18, and the guide post 26 is axially, hermetically and slidably fitted in a circular groove D21 at the top of the circular groove C19; as shown in fig. 1, 2 and 3, the lower end of the connecting cylinder 18 is fitted with a seal ring B11; as shown in fig. 1, 5 and 9, a spring B28 for resetting the guide post 26 is nested on the guide post; the guide post 26 is mounted with a tapered shroud 32. the shroud 32 moves vertically with the guide post 26 within a circular channel C19. The conical protective cover 32 increases the containing space of the filling liquid in the circular groove C19, and simultaneously ensures that the filling liquid entering the circular groove C19 falls down to the periphery in the liquid storage tank 52 under the guidance of the conical protective cover 32, thereby reducing the filling liquid residue on the plunger 6 to the maximum extent. A ring sleeve A33 is circumferentially rotated and axially slidably matched on the guide post 26, and the ring sleeve A33 is positioned below the protective cover 32; as shown in fig. 10, 12 and 14, two screw blocks 35 symmetrically mounted on the guide post 26 slide in two spiral grooves 34 on the inner wall of the ring sleeve a 33; as shown in fig. 5 and 6, a spring C36 for restoring the ring sleeve a33 is nested on the guide post 26; as shown in fig. 5, 7 and 13, a cylinder 41 is installed on the ring sleeve a33, and a plurality of sliding sleeves 42 are evenly installed on the lower end of the cylinder 41 in the circumferential direction; as shown in fig. 3, a sliding rod 44 slides in each sliding sleeve 42 along the guide post 26 in the radial direction, and a spring D45 for resetting the sliding rod 44 is nested on the sliding rod 44; as shown in fig. 2, 3 and 7, one end of the sliding rod 44 is provided with an arc-shaped scraper 47 which is matched with the inner wall of the sealing ring B11, the inner wall of the circular groove A3 and the annular area of the upper end surface of the plunger 6 close to the inner wall of the circular groove A3; as shown in fig. 3, 7 and 10, a winding wheel 49 axially slides on the guide post 26, and a plurality of thin steel wires 51 connected with the slide rods 44 one by one are wound on the winding wheel 49 in the same direction; as shown in fig. 5 and 8, the liquid inlet hole 20 on the inner wall of the circular groove C19 is communicated with the liquid source through the liquid inlet pipe 25. The sealing ring B11 deforms under the compression of the connecting cylinder 18 to seal the space between the connecting cylinder 18 and the tank cover 2, thereby preventing the toxic or corrosive liquid filled in the liquid storage tank 52 from leaking, and ensuring the surrounding ground environment from being polluted and the safety of operators.

As shown in fig. 2, 3 and 17, the lower end of the guide post 26 engages a circular groove B9 in the middle of the upper end face of the plunger 6.

As shown in fig. 2 and 17, the outer conical surface 7 is provided with a ring groove B8, and a sealing ring a10 matched with the inner conical surface 5 is installed in the ring groove B8; as shown in fig. 15, a ring plate a15 with the same central axis is arranged in the tank cover 2 through a plurality of support rods 14 which are uniformly distributed in the axial direction; as shown in fig. 15, 17 and 18, a plurality of guide rods a12 are axially and uniformly arranged at the lower end of the plunger 6, and a guide rod a12 axially slides in a guide groove a16 on a ring plate a 15; the spring A13 is nested at the outer side of the guide rods A12; spring A13 is connected to plunger 6 at one end and to ring plate A15 at the other end. The guide groove A16 on the ring plate A15 is matched with the guide rod A12 to play a positioning and guiding role for the axial movement of the plunger 6.

As shown in fig. 6 and 8, two ring grooves C22 are formed on the inner wall of the circular groove D21, and a sealing ring C27 matched with the guide post 26 is installed in the ring groove C22; as shown in fig. 5, a ring plate B29 is mounted at the upper end of the guide post 26, and a spring B28 nested on the guide post 26 is positioned between the ring plate B29 and the connecting cylinder 18; one end of the spring B28 is connected with the connecting cylinder 18, and the other end is connected with the ring plate B29; as shown in fig. 5, 8 and 9, two guide rods B30 are symmetrically mounted on the ring plate B29, and two guide rods B30 axially slide in two guide grooves B23 on the connecting cylinder 18, respectively. The engagement of the guide bar B30 with the guide slot B23 provides a positive guide for the axial sliding movement of the guide post 26 relative to the connecting cylinder 18. As shown in fig. 6 and 8, two ring grooves D24 are formed in the inner wall of each guide groove B23, and a sealing ring D31 which is matched with the corresponding guide rod B30 is installed in each ring groove D24. The engagement of the seal ring C27 with the guide post 26 and the seal ring D31 with the guide rod B30 prevent leakage of the filling liquid entering the circular groove C19. As shown in fig. 6 and 11, a ring B37 is rotatably fitted on the guide post 26, and a ring C39 mounted on the guide post 26 is rotated in a ring groove E38 on the inner wall of the ring B37; as shown in fig. 10, two guide blocks 50 are symmetrically installed on the inner wall of the winding wheel 49, and the two guide blocks 50 respectively slide in the two guide grooves C40 on the guide post 26. The engagement of the guide groove C40 with the guide block 50 provides a positioning guide for the axial sliding movement of the winding wheel 49 relative to the guide post 26. As shown in fig. 3 and 19, the spring D45 nested on the sliding rod 44 is positioned in a ring groove F43 on the inner wall of the corresponding sliding sleeve 42; the spring D45 has one end connected to the inner wall of the corresponding ring groove F43 and the other end connected to the tension spring ring 46 mounted on the corresponding slide bar 44.

As shown in fig. 2, the diameter of the circular groove C19 is equal to the inner diameter of the seal ring B11, and the inner diameter of the seal ring B11 is equal to the diameter of the circular groove A3, so that it is ensured that dust does not accumulate in the circular groove a4, and that dust accumulated on the seal ring B11 is covered by the connecting cylinder 18 pressed thereon and does not fall into the reservoir tank 52 with the opening of the circular groove C19 by the plunger 6, and that the filling liquid in the reservoir tank 52 is not contaminated by dust.

As shown in fig. 3 and 14, the scraper 47 has a sharp corner 48 that fits in the gap between the inner wall of the circular groove C19 and the plunger 6 to scrape off and adsorb dust accumulated in the gap between the plungers 6. The scraper 47 is coated with the electrostatic dust collector, so that the scraper 47 can effectively adsorb and clean dust accumulated in a place where the scraper passes through.

The inner diameter of the circular groove C19 is equal to the inner diameter of the sealing ring B11, the inner diameter of the sealing ring B11 is equal to the inner diameter of the circular groove A3, and a plurality of scraping plates 47 can smoothly enter the circular groove A3 from the circular groove C19 through the sealing ring B11.

Both spring A13 and spring D45 are in a compressed state at all times in the present invention.

The liquid inlet pipe 25 of the present invention is provided with a switch valve.

According to the invention, the elastic coefficient of the spring C36 is smaller than that of the spring A13, so that after the sliding sleeves 42 and the scrapers 47 are in contact with the upper end face of the plunger 6, the spring C36 is compressed along with the continuous vertical downward movement of the guide post 26, the ring sleeve A33 drives the scrapers 47 to rotate along with the ring sleeve A33 under the matching action of the two spiral blocks 35 on the guide post 26 and the corresponding spiral grooves 34, and the scrapers 47 effectively adsorb and clean dust accumulated on the upper end face of the plunger 6. At the same time, plunger 6 is guaranteed to remain in sealing contact engagement with can lid 2 under the urging of spring A13, preventing dust from falling into reservoir 52.

The number of the scrapers 47 is 10, so that when the ring sleeve A33 drives the scrapers 47 to rotate for 30 degrees through a series of transmission, the gaps between the plunger 6 and the inner wall of the circular groove C19, the top edge of the plunger 6 and dust accumulated on the inner wall of the circular groove A3 are completely absorbed and cleaned, the vertical movement stroke of the guide column 26 and the rotation angle of the ring sleeve A33 are reduced, the dust blowing cleaning efficiency is improved, and the liquid filling efficiency is further improved.

The working process of the invention is as follows: in the initial state, the scrapers 47 are simultaneously abutted against the inner wall of the circular groove C19 under the action of the corresponding springs D45 respectively, so as to ensure that the sharp corners 48 on the scrapers 47 after entering the circular groove A3 can enter the gap between the plunger 6 and the inner wall of the circular groove A3 and effectively adsorb and clean dust in the gap. The thin steel wires 51 connecting the sliding rods 44 are in a relaxed state, the top end of the protective cover 32 is in contact with the top of the circular groove C19, the spring B28 is in a pre-compressed state, the spring C36 is in a natural state, and the spiral block 35 is located at the top end of the corresponding spiral groove 34. The sealing contact between the external conical surface 7 of the plunger 6 and the internal conical surface 5 of the can cover 2 closes the circular groove a3 of the can cover 2. The on-off valve on the liquid inlet pipe 25 is in a closed state. The guide blocks 50 in the winding wheel 49 are located at the bottom limit of the corresponding guide groove C40.

When the liquid is required to be filled into the liquid storage tank 52 by using the dust removing and filling device, the tank cover 2 in the cover mechanism 1 is tightly screwed on the tank opening of the liquid storage tank 52, and then the lower end of the connecting cylinder 18 on the dust removing and filling mechanism 17 is tightly pressed on the sealing ring B11, so that the sealing ring B11 is deformed, the sealing connection between the connecting cylinder 18 and the tank cover 2 is ensured, and the leakage is prevented when the liquid is filled into the liquid storage tank 52.

The pushing ring plate B29 moves vertically downwards, the ring plate B29 drives the guide post 26 to move synchronously, the guide post 26 drives the protective cover 32 and the winding wheel 49 to move synchronously, the protective cover 32 approaches the plunger 6 quickly, and the spring B28 is further compressed to store energy. Meanwhile, the guide post 26 drives the ring sleeve A33 to move synchronously through the ring sleeve C39, the ring sleeve B37 and the spring C36, the ring sleeve A33 drives the sliding sleeves 42 to move synchronously through the cylinder 41, and the sliding sleeves 42 respectively drive the corresponding scrapers 47 to move synchronously and vertically in the direction of the circular groove A3 on the tank cover 2 through the corresponding sliding rods 44.

When the sliding sleeves 42 meet and contact the upper end face of the plunger 6, the scrapers 47 and the winding wheel 49 simultaneously contact the upper end face of the plunger 6, the tail end of the guide post 26 is cut into the circular groove B9 on the plunger 6 to realize the positioning of the guide post 26, and the sharp corner 48 on the scraper 47 enters the gap between the plunger 6 and the inner wall of the circular groove C22. As the guide post 26 continues to move vertically downward, the guide post 26 compresses the spring C36 via the bushing C39 and bushing B37, resulting in relative axial sliding between the guide post 26 and the bushing a33, since the spring a13 has a much greater spring rate than the spring C36. Under the interaction of the two screw blocks 35 and the two spiral grooves 34 on the inner wall of the ring sleeve A33, the guide post 26 is prevented from rotating by the two guide rods B30 through the ring plate B29, so the ring sleeve A33 rotates relative to the guide post 26, the ring sleeve A33 drives the plurality of sliding sleeves 42 to synchronously rotate through the cylinder 41, the plurality of sliding sleeves 42 respectively drive the plurality of scraping plates 47 to synchronously rotate through the corresponding sliding rods 44, the plurality of scraping plates 47 adsorb and clean a gap between the plunger 6 and the inner wall of the circular groove C19, the top edge of the plunger 6 and dust accumulated on the inner wall of the circular groove A3, and the gap between the plunger 6 and the inner wall of the circular groove C19, the top edge of the plunger 6 and the dust accumulated on the inner wall of the circular groove A3 cannot enter the liquid storage tank 52 along with the liquid to pollute the liquid injected into the liquid storage tank 52. At the same time, the thin wires 51 connecting the sliding rods 44 are wound synchronously toward the winding wheel 49 and gradually tend to be tightened, and the protective cover 32 continues to approach the scrapers 47.

When the ring sleeve A33 rotates by about 30 degrees, the scrapers 47 finish 360-degree adsorption cleaning of gaps between the plunger 6 and the inner wall of the circular groove C19, the top edge of the plunger 6 and dust accumulated on the inner wall of the circular groove A3, the thin steel wires 51 connecting the slide rods 44 are just tightened, the distance between the protective cover 32 and the scrapers 47 is still kept, and the two spiral blocks 35 do not reach the bottoms of the corresponding spiral grooves 34. As the guide post 26 continues to move vertically downward, the ring A33 continues to rotate the scrapers 47 through a series of drives, and the thin wire 51 connected to the sliding rod 44 continues to wind onto the winding wheel 49. The thin wire 51 pulls the corresponding scraper 47 toward the center of the guide post 26 through the corresponding slide bar 44 and disengages from the inner wall of the circular groove A3, and the spring D45 that returns the slide bar 44 is further compressed and stored with energy.

As the scrapers 47 retract into the range of the protective cover 32, which continues to move vertically downward by the guide posts 26, covers the scrapers 47 therein. When the lower end surface of the protective cover 32 is abutted against the top end of the plunger 6, the lower end of the guide post 26 is about to reach the bottom of the circular groove B9, and the plurality of scrapers 47 are completely covered in the protective cover 32 and are sealed and protected by the protective cover 32, so that the scrapers 47, the sliding rods 44, the sliding sleeve 42 and the thin steel wire 51 are prevented from being corroded when filled corrosive liquid flows through the outer side of the protective cover 32. At the same time, the two screw blocks 35 reach the bottom of the corresponding spiral grooves 34 at the same time, the ring a33 stops rotating, the scrapers 47 stop rotating,

as the guide post 26 continues to move vertically downwards, the guide post 26 drives the plunger 6 to move vertically downwards by the protective cover 32 against the bias of the spring a13, the movement of the plunger 6 causes the circular groove A3 on the can cover 2 to be gradually opened, and the spring a13 is further compressed to store energy. When the protective cover 32 and the tank cover 2 completely enter the liquid storage tank 52 so that the circular groove A3 on the tank cover 2 is completely opened, the switch valve on the liquid inlet pipe 25 is opened, so that the liquid enters the liquid storage tank 52 through the liquid inlet pipe 25, the circular groove C19 and the circular groove A3. As the gaps between the plunger 6 and the inner wall of the circular groove C19, the top edge of the plunger 6 and the dust accumulated on the inner wall of the circular groove A3 are absorbed and cleaned by the scraping plates 47, no dust enters the liquid storage tank 52 along with the liquid, the cleanness of the liquid filled in the liquid storage tank 52 is ensured, and the liquid filling quality is ensured.

When the liquid storage tank 52 is filled with liquid, the switch valve on the liquid inlet pipe 25 is closed, and when the liquid remained in the circular groove C19 completely enters the liquid storage tank 52 through the circular groove A3, the connecting cylinder 18 is pressed by hand, so that the connecting cylinder 18 continuously keeps pressing against the sealing ring B11 on the tank cover 2, and then the pressure acting on the ring plate B29 is removed. Under the reset action of the spring B28, the ring plate B29 drives the guide post 26 to reset instantly, and the guide post 26 drives the component mounted on the guide post to reset instantly. In the resetting process, under the resetting action of the spring C36, the ring A33 generates reverse rotation under the cooperation of the two spiral blocks 35 and moves vertically downwards relative to the guide post 26, the ring A33 drives the plurality of scrapers 47 to reversely rotate and reset through a series of transmission, and meanwhile, the winding wheel 49 discharges the thin steel wire 51 and enables the thin steel wire 51 to be finally in a loose state of an initial state.

With the resetting of the protective cover 32, the plunger 6 in the cover mechanism 1 is quickly reset under the resetting action of the spring A13 and is sealed and closed again to the round groove A3 on the can cover 2.

After the guide post 26 is reset, the connecting cylinder 18 is removed from the can cover 2, the cover mechanism 1 is screwed off the opening of the liquid storage tank 52, and a new plastic can cover 2 is screwed on the opening of the liquid storage tank 52, so that the liquid filling and sealing in the liquid storage tank 52 can be completed.

In conclusion, the beneficial effects of the invention are as follows: according to the invention, the dust removing and filling mechanism 17 is matched with the cover mechanism 1 to effectively clean dust attached to a gap between the plunger 6 and the cover 2 in the cover mechanism 1 before the cover mechanism 1 is opened, so that the dust accumulated in the gap between the plunger 6 and the cover 2 is prevented from falling into the liquid storage tank 52 after the cover mechanism 1 is opened to pollute the filling liquid filled in the liquid storage tank 52, and the liquid filling quality is ensured.

Meanwhile, the scraping plate 47 of the invention retracts to the protective cover 32 after absorbing and cleaning dust accumulated in the gap between the plunger 6 and the tank cover 2 and is covered and protected by the protective cover 32, thereby ensuring that the scraping plate 47, the sliding rod 44, the thin steel wire 51 and the winding wheel 49 are not damaged in a top view when toxic or corrosive liquid is filled into the liquid storage tank 52, and prolonging the service life of the scraping plate 47, the sliding rod 44, the thin steel wire 51 and the winding wheel 49.