阅读说明：本技术 一种机械密封化工泵及其使用方法 (Mechanical seal chemical pump and use method thereof ) 是由 丁彪 于 2020-05-15 设计创作，主要内容包括：本发明公开了一种机械密封化工泵,包括底座,所述底座的上表面固定安装有电机座,所述电机座的上表面固定安装有驱动电机,所述底座的上表面靠近电机座的一侧固定安装有齿轮泵腔,所述齿轮泵腔的内部开设有两个齿轮空腔,所述齿轮泵腔的一侧固定安装有第一端盖,所述齿轮泵腔的另一侧固定安装有螺杆腔体,所述螺杆腔体的内部开设有螺杆腔；本发明还公开了一种机械密封化工泵的使用方法。本发明中,通过在第一端盖与齿轮泵腔之间、第二端盖与螺杆腔体之间实现机械密封,从而提高该化工泵的密封性,通过设置的阳螺杆与阴螺杆配合使用,能够提高该化工泵的吸力,同时避免液体中存在颗粒导致化工泵堵塞,阳螺杆与阴螺杆能够粉碎颗粒。(The invention discloses a mechanical seal chemical pump which comprises a base, wherein a motor base is fixedly arranged on the upper surface of the base, a driving motor is fixedly arranged on the upper surface of the motor base, a gear pump cavity is fixedly arranged on one side, close to the motor base, of the upper surface of the base, two gear cavities are formed in the gear pump cavity, a first end cover is fixedly arranged on one side of the gear pump cavity, a screw rod cavity is fixedly arranged on the other side of the gear pump cavity, and a screw rod cavity is formed in the screw rod cavity; the invention also discloses a using method of the mechanical seal chemical pump. According to the invention, mechanical sealing is realized between the first end cover and the gear pump cavity and between the second end cover and the screw cavity, so that the sealing performance of the chemical pump is improved, the suction force of the chemical pump can be improved by matching the arranged male screw and the female screw, the chemical pump is prevented from being blocked due to particles in liquid, and the particles can be crushed by the male screw and the female screw.)

1. The mechanical seal chemical pump is characterized by comprising a base (3), wherein a motor base (2) is fixedly mounted on the upper surface of the base (3), a driving motor (1) is fixedly mounted on the upper surface of the motor base (2), a gear pump cavity (6) is fixedly mounted on one side, close to the motor base (2), of the upper surface of the base (3), two gear cavities (8) are formed in the gear pump cavity (6), a first end cover (5) is fixedly mounted on one side of the gear pump cavity (6), a screw cavity (14) is fixedly mounted on the other side of the gear pump cavity (6), a screw cavity (15) is formed in the screw cavity (14), two first bearings (23) are rotatably mounted on the inner wall of the screw cavity (15) close to one end of the inner wall, a first lantern ring (22) is fixedly mounted on the surface of one side of each of the first bearings (23), a male screw (12) and a female screw (13) are rotatably mounted in the screw cavity (15), the male screw (12) and the female screw (13) are connected in a meshed manner, one ends of inner shafts of the male screw (12) and the female screw (13) are respectively inserted into two first bearings (23) and penetrate through a first lantern ring (22), and the other ends of the inner shafts of the male screw (12) and the female screw (13) are respectively inserted into the gear pump cavity (6);

a coupler (4) is fixedly installed on an output shaft of the driving motor (1), the output shaft of the coupler (4) penetrates through a first end cover (5) and is fixedly installed with an inner shaft of the male screw (12), a second rubber sealing ring (35) is fixedly installed on the inner wall of one of the gear cavities (8), a second shaft sleeve (34) is fixedly installed on one side, close to the second rubber sealing ring (35), of the inner wall of one of the gear cavities (8), a first rubber sealing ring (33) is fixedly installed on one side, close to the second shaft sleeve (34), of one of the gear cavities (8), a first pressing flange sealing ring (32) is fixedly installed on one side surface, close to the first rubber sealing ring (33), of one of the gear cavities (8), a first pressing flange (31) is fixedly installed on one side surface, close to the first pressing flange sealing ring (32), a second bearing (30) is fixedly arranged on one side surface of one of the gear cavities (8) close to the first pressing flange (31), and a second sleeve ring (29) is fixedly arranged on one side surface of one of the gear cavities (8) close to the second bearing (30);

a fourth rubber sealing ring (46) is fixedly mounted on the inner wall of the other gear cavity (8), a third shaft sleeve (45) is fixedly mounted on one side, close to the fourth rubber sealing ring (46), of the inner wall of the other gear cavity (8), a third rubber sealing ring (44) is fixedly mounted on one side, close to the third shaft sleeve (45), of the inner wall of the other gear cavity (8), a second pressing flange sealing ring (43) is fixedly mounted on one side, close to the third rubber sealing ring (44), of the inner wall of the other gear cavity (8), a second pressing flange (42) is fixedly mounted on one side, close to the second pressing flange (42), of the inner wall of the other gear cavity (8), a third bearing (41) is fixedly mounted on one side, close to the third bearing (41), of the surface of the inner wall of the other gear cavity (8), and a third sleeve ring (39) is fixedly mounted on one side.

2. The mechanical seal chemical pump according to claim 1, wherein a first end cover sealing ring (7) is fixedly arranged between the first end cover (5) and the gear pump cavity (6), an air outlet (11) is fixedly arranged on the front surface of the gear pump cavity (6), an air outlet flange cover (10) is fixedly arranged at the front end of the air outlet (11), and an air outlet sealing ring (9) is fixedly arranged between the air outlet flange cover (10) and the air outlet (11).

3. The mechanical seal chemical pump according to claim 1, wherein the upper surface of the screw cavity (14) is fixedly provided with an air inlet (21), the upper end of the air inlet (21) is fixedly provided with an air inlet flange cover (19), an air inlet sealing ring (20) is fixedly arranged between the air inlet flange cover (19) and the air inlet (21), the front surface of the screw cavity (14) is fixedly provided with a water nozzle (16) at a position close to the upper end, one side of the screw cavity (14) far away from the gear pump cavity (6) is fixedly provided with a second end cover (25), a second end cover spring gasket (24) and a second end cover sealing ring (26) are fixedly arranged between the second end cover (25) and the screw cavity (14), the second end cover spring gasket (24) is arranged on the second end cover (25), and the second end cover sealing ring (26) is arranged on the screw cavity (14), an oil penetration hole (18) is fixedly arranged on one side, close to the air inlet (21), of the upper surface of the screw cavity (14), and a sealing cover (17) is fixedly arranged at the upper end of the oil penetration hole (18).

4. The mechanically-sealed chemical pump according to claim 1, wherein the second rubber seal ring (35), the second bushing (34), the first rubber seal ring (33), the first compression flange seal ring (32), the first compression flange (31), the second bearing (30) and the second bushing ring (29) are sequentially in close contact with each other, and the male gear (28) is fixedly mounted at one end of the male screw (12) which penetrates through the second rubber seal ring (35), the second bushing (34), the first rubber seal ring (33), the first compression flange seal ring (32), the first compression flange (31), the second bearing (30) and the second bushing ring (29).

5. The mechanically sealed chemical pump according to claim 1, wherein the inner side surface of the first end cover (5) is fixedly provided with a first shaft sleeve (27), and the output shaft of the coupling (4) is fixedly arranged with the inner shaft of the male screw (12) through the first shaft sleeve (27).

6. The mechanically-sealed chemical pump according to claim 1, wherein the fourth rubber seal ring (46), the third shaft sleeve (45), the third rubber seal ring (44), the second compression flange seal ring (43), the second compression flange (42), the third bearing (41) and the third lantern ring (39) are sequentially in close contact with each other, the inner shaft of the female screw (13) penetrates through the fourth rubber seal ring (46), the third shaft sleeve (45), the third rubber seal ring (44), the second compression flange seal ring (43), the second compression flange (42), the third bearing (41) and one end of the third lantern ring (39) to be fixedly provided with the female gear (40), the inward side surface of the first end cover (5) close to the first shaft sleeve (27) is sequentially and fixedly provided with the stop washer (36), and the surface of the stop washer (36) far away from the first end cover (5) is fixedly provided with the gear baffle (37), and an expansion connecting sleeve (38) is fixedly arranged on the surface of one side, away from the stop washer (36), of the gear baffle (37), and the other end of the inner shaft of the female screw (13) is inserted into the expansion connecting sleeve (38) to be rotatably arranged.

7. A mechanically sealed chemical pump according to claim 6, wherein the female gear (40) is in meshing engagement with the male gear (28).

8. A use method of a mechanical seal chemical pump is characterized by comprising the following steps:

the method comprises the following steps: a gas inlet flange cover (19) on a gas inlet (21) and a gas outlet flange cover (10) on a gas outlet (11) are disassembled, and the gas inlet (21) is connected to a liquid outlet of chemical liquid;

step two: starting a driving motor (1) on a motor base (2), driving the coupling (4) to rotate by the running driving motor (1), driving a male screw (12) to rotate by an inner shaft of the male screw (12) by the rotating coupling (4), driving the male screw (12) to rotate by a male gear (28) on the inner shaft of the male screw (12), enabling the female screw (13) to synchronously rotate with the male screw (12) due to the fact that the male gear (28) is meshed with a female gear (40), driving the female screw (13) to rotate by a female gear (40) on the inner shaft of the female screw (13), inserting one end of the female screw (13) into one of first bearings (23), and enabling the other end of the female screw (13) to penetrate through a fourth rubber sealing ring (46), a third shaft sleeve (45), a third rubber sealing ring (44), a second pressing flange sealing ring (43), a second pressing flange (42), a third bearing (41), The third sleeve ring (39) is inserted in the expansion connecting sleeve (38), one end of the male screw (12) is inserted in the other first bearing (23), and the other end of the male screw (12) penetrates through the second rubber sealing ring (35), the second sleeve (34), the first rubber sealing ring (33), the first pressing flange sealing ring (32), the first pressing flange (31), the second bearing (30), the second sleeve ring (29) and an output shaft of the coupler (4) to be fixedly mounted;

step three: the rotating male screw (12) and the female screw (13) generate suction force, chemical liquid is sucked from the air inlet (21) and then is discharged from the air outlet (11).

Technical Field

The invention relates to the technical field of chemical pumps, in particular to a mechanical seal chemical pump and a using method thereof.

Background

The chemical pump is widely used for water supply and drainage in industry and city, and can also be used for irrigation and drainage in farmland and orchard, and is used for conveying clear water or other liquid with similar physical and chemical properties, and the chemical pump can be divided into the following parts according to the process flow: a feeding pump, a reflux pump, a circulating pump, a flushing pump, a sewage pump, a replenishing pump, an output pump and the like; according to the public engineering, the pump can be divided into a boiler pump, a cooling tower pump, a fire-fighting pump, a water source deep-well pump and the like, and the chemical pump has wide application.

Patent document (CN104121226A) discloses a chemical centrifugal pump. The mechanical sealing device comprises a mechanical sealing movable ring and a mechanical sealing static ring, wherein the mechanical sealing movable ring and the mechanical sealing static ring are respectively sleeved on the impeller shaft, the mechanical sealing movable ring is in contact with the impeller shaft, the front end of the mechanical sealing movable ring is arranged between the impeller rear opening ring and the impeller shaft, the front end of the mechanical sealing movable ring is in contact with the rear end of the rear snap ring of the impeller, the rear end of the mechanical sealing static ring is arranged between the inner surface of the shaft hole of the pump cover and the impeller shaft, and the rear end of the mechanical sealing static ring is in contact with the pump cover. The arrangement can effectively prevent materials from entering the machine seal, prevent the machine seal from being damaged and locked, and greatly prolong the service life of the machine seal; but the chemical centrifugal pump has poor sealing performance, and is easy to cause liquid leakage after long-term use, so that the suction force is reduced, particles in liquid cannot be crushed, and the pump is easy to block.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a mechanical seal chemical pump and a using method thereof.

The purpose of the invention can be realized by the following technical scheme:

a mechanical seal chemical pump comprises a base, wherein a motor base is fixedly arranged on the upper surface of the base, a driving motor is fixedly arranged on the upper surface of the motor base, a gear pump cavity is fixedly arranged on one side, close to the motor base, of the upper surface of the base, two gear cavities are formed in the gear pump cavity, a first end cover is fixedly arranged on one side of the gear pump cavity, a screw cavity is fixedly arranged on the other side of the gear pump cavity, a screw cavity is formed in the screw cavity, two first bearings are rotatably arranged on the inner wall of the screw cavity, close to one end, the surfaces of one side of each first bearing are fixedly provided with a first lantern ring, a male screw and a female screw are rotatably arranged in the screw cavity, the male screw and the female screw are connected in a meshed mode, one ends of the male screw and the female screw are respectively inserted into the two first bearings and penetrate through the first lantern rings, the other ends of the inner shafts of the male screw and the female screw are inserted into the gear pump cavity;

the output shaft of the driving motor is fixedly provided with a coupler, the output shaft of the coupler penetrates through the first end cover and is fixedly arranged with the inner shaft of the male screw, a second rubber sealing ring is fixedly arranged on the inner wall of one of the gear cavities, a second shaft sleeve is fixedly arranged on one side of the inner wall of one of the gear cavities, which is close to the second rubber sealing ring, one side of one of the gear cavities close to the second shaft sleeve is fixedly provided with a first rubber sealing ring, the surface of one side of one of the gear cavities close to the first rubber sealing ring is fixedly provided with a first pressing flange sealing ring, a first pressing flange is fixedly arranged on the surface of one side of one of the gear cavities close to the first pressing flange sealing ring, a second bearing is fixedly arranged on the surface of one side, close to the first pressing flange, of one of the gear cavities, and a second sleeve ring is fixedly arranged on the surface of one side, close to the second bearing, of one of the gear cavities;

the inner wall of the other gear cavity is fixedly provided with a fourth rubber sealing ring, one side of the inner wall of the other gear cavity, which is close to the fourth rubber sealing ring, is fixedly provided with a third shaft sleeve, one side of the inner wall of the other gear cavity, which is close to the third shaft sleeve, is fixedly provided with a third rubber sealing ring, one side of the inner wall of the other gear cavity, which is close to the third rubber sealing ring, is fixedly provided with a second pressing flange, one side of the inner wall of the other gear cavity, which is close to the second pressing flange, is fixedly provided with a third bearing, and one side of the.

Further, the method comprises the following steps: the gear pump is characterized in that a first end cover sealing ring is fixedly arranged between the first end cover and the gear pump cavity, a gas outlet is fixedly arranged on the front surface of the gear pump cavity, a gas outlet flange cover is fixedly arranged at the front end of the gas outlet, and a gas outlet sealing ring is fixedly arranged between the gas outlet flange cover and the gas outlet.

Further, the method comprises the following steps: the last fixed surface of screw rod cavity installs the air inlet, the upper end fixed mounting of air inlet has the air inlet blind flange, fixed mounting has the air inlet sealing washer between air inlet blind flange and the air inlet, the position fixed mounting that the front surface of screw rod cavity is close to the upper end has the water injection well choke, one side fixed mounting that the gear pump chamber was kept away from to the screw rod cavity has the second end cover, fixed mounting has second end cover spring washer and second end cover sealing washer between second end cover and the screw rod cavity, second end cover spring washer installs on the second end cover, second end cover sealing washer is installed on the screw rod cavity, one side fixed mounting that the upper surface of screw rod cavity is close to the air inlet has the oil seepage hole, the upper end fixed mounting of oil seepage hole has.

Further, the method comprises the following steps: the second rubber sealing ring, the second shaft sleeve, the first rubber sealing ring, the first pressing flange, the second bearing and the second sleeve ring are sequentially in close contact with one another, and a male gear is fixedly mounted at one end of an inner shaft of the male screw rod, which penetrates through the second rubber sealing ring, the second shaft sleeve, the first rubber sealing ring, the first pressing flange, the second bearing and the second sleeve ring.

Further, the method comprises the following steps: the inner side surface of the first end cover is fixedly provided with a first shaft sleeve, and an output shaft of the coupler penetrates through the first shaft sleeve and is fixedly arranged with an inner shaft of the male screw.

Further, the method comprises the following steps: the female screw rod is characterized in that a fourth rubber sealing ring, a third shaft sleeve, a third rubber sealing ring, a second pressing flange, a third bearing and a third sleeve ring are sequentially in close contact with one another, one end of an inner shaft of the female screw rod penetrates through the fourth rubber sealing ring, the third shaft sleeve, the third rubber sealing ring, the second pressing flange, the third bearing and the third sleeve ring and is fixedly provided with a female gear, a stop washer is fixedly arranged on the inner side surface of the first end cover close to the first shaft sleeve in sequence, a gear baffle is fixedly arranged on the surface of one side, far away from the first end cover, of the gear baffle is fixedly provided with an expansion connecting sleeve, and the other end of the inner shaft of the female screw rod is inserted into the expansion connecting sleeve and is rotatably arranged.

Further, the method comprises the following steps: the female gear is in meshed connection with the male gear.

A use method of a mechanical seal chemical pump comprises the following steps:

the method comprises the following steps: a gas inlet flange cover on the gas inlet and a gas outlet flange cover on the gas outlet are disassembled, and the gas inlet is connected to the liquid outlet of the chemical liquid;

step two: starting a driving motor on a motor base, driving a coupler to rotate by the running driving motor, driving a male screw to rotate by a rotating coupler through an inner shaft of the male screw, driving a male gear on the inner shaft of the male screw to rotate, driving a female screw to rotate by a female gear on the inner shaft of the female screw due to meshing connection of the male gear and the female gear, so that the female screw and the male screw synchronously rotate, inserting one end of the female screw into one of first bearings, inserting the other end of the female screw into a tensioning connecting sleeve through a fourth rubber sealing ring, a third shaft sleeve, a third rubber sealing ring, a second tensioning flange, a third bearing and a third sleeve, inserting one end of the male screw into the other first bearing, inserting the other end of the male screw through the second rubber sealing ring, the second shaft sleeve, the first rubber sealing ring, the first tensioning flange sealing, The second bearing, the second lantern ring and the output shaft of the coupler are fixedly arranged;

step three: the rotating male screw and the rotating female screw generate suction force to suck chemical liquid from the air inlet and then discharge the chemical liquid from the air outlet.

The invention has the beneficial effects that:

1. mechanical sealing is realized between the first end cover and the gear pump cavity and between the second end cover and the screw cavity, so that the sealing performance of the chemical pump is improved, a first end cover sealing ring is adopted between the first end cover and the gear pump cavity, and a second end cover spring gasket and a second end cover sealing ring are adopted between the second end cover and the screw cavity for sealing, so that the durability of the sealing performance of the chemical pump is improved, and the structure is simple;

2. the suction of the chemical pump can be improved by matching the arranged male screw and the female screw, the blockage of the chemical pump caused by the particles in the liquid can be avoided, the particles can be crushed by the male screw and the female screw, the driving motor on the motor base is started, the running driving motor drives the shaft coupling to rotate, the rotating shaft coupling drives the male screw to rotate through the inner shaft of the male screw, the male gear on the inner shaft of the male screw rotates along with the male screw, the male gear on the male screw is meshed with the female gear, the female gear on the inner shaft of the female screw drives the female screw to rotate, so that the female screw and the male screw synchronously rotate, one end of the female screw is inserted in one of the first bearings, the other end of the female screw penetrates through the fourth rubber sealing ring, the third shaft sleeve, the third rubber sealing ring, the second pressing flange, the third bearing and the third sleeve are inserted in, one end of the male screw rod is inserted into the other first bearing, and the other end of the male screw rod penetrates through the second rubber sealing ring, the second shaft sleeve, the first rubber sealing ring, the first pressing flange, the second bearing, the second sleeve ring and the output shaft of the coupler to be fixedly mounted.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the overall structure of a mechanically sealed chemical pump according to the present invention;

FIG. 2 is an internal view of a gear pump cavity of the present invention;

fig. 3 is an internal view of a gear pump cavity of the present invention.

In the figure: 1. a drive motor; 2. a motor base; 3. a base; 4. a coupling; 5. a first end cap; 6. a gear pump cavity; 7. a first end cap seal ring; 8. a gear cavity; 9. a liquid outlet sealing ring; 10. a liquid outlet flange cover; 11. a liquid outlet; 12. a male screw; 13. a female screw; 14. a screw cavity; 15. a screw cavity; 16. a water nozzle; 17. sealing the cover; 18. an oil-bleeding hole; 19. a liquid inlet flange cover; 20. a liquid inlet sealing ring; 21. a liquid inlet; 22. a first collar; 23. a first bearing; 24. a second end cap spring washer; 25. a second end cap; 26. a second end cap seal ring; 27. a first bushing; 28. a male gear; 29. a second collar; 30. a second bearing; 31. a first hold-down flange; 32. a first hold-down flange seal ring; 33. a first rubber seal ring; 34. a second shaft sleeve; 35. a second rubber seal ring; 36. a stop washer; 37. a gear baffle; 38. expanding and tightly connecting the connecting sleeve; 39. a third collar; 40. a female gear; 41. a third bearing; 42. a second hold-down flange; 43. a second hold-down flange seal ring; 44. a third rubber seal ring; 45. a third shaft sleeve; 46. and a fourth rubber sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a mechanical seal chemical pump includes a base 3, a motor base 2 is fixedly mounted on an upper surface of the base 3, a driving motor 1 is fixedly mounted on an upper surface of the motor base 2, a gear pump cavity 6 is fixedly mounted on one side of the upper surface of the base 3 close to the motor base 2, two gear cavities 8 are formed in the gear pump cavity 6, a first end cover 5 is fixedly mounted on one side of the gear pump cavity 6, a screw cavity 14 is fixedly mounted on the other side of the gear pump cavity 6, a screw cavity 15 is formed in the screw cavity 14, two first bearings 23 are rotatably mounted at positions of inner walls of the screw cavity 15 close to one end, first collars 22 are fixedly mounted on surfaces of one sides of the first bearings 23, a male screw 12 and a female screw 13 are rotatably mounted in the screw cavity 15, and the male screw 12 is engaged with the female screw 13, one ends of the inner shafts of the male screw 12 and the female screw 13 are respectively inserted into two first bearings 23 and penetrate through the first collar 22, and the other ends of the inner shafts of the male screw 12 and the female screw 13 are both inserted into the gear pump cavity 6;

a coupler 4 is fixedly installed on an output shaft of the driving motor 1, the output shaft of the coupler 4 penetrates through a first end cover 5 and is fixedly installed with an inner shaft of the male screw 12, a second rubber sealing ring 35 is fixedly installed on the inner wall of one of the gear cavities 8, a second shaft sleeve 34 is fixedly installed on one side, close to the second rubber sealing ring 35, of the inner wall of one of the gear cavities 8, a first rubber sealing ring 33 is fixedly installed on one side, close to the second shaft sleeve 34, of one of the gear cavities 8, a first pressing flange sealing ring 32 is fixedly installed on the surface of one side, close to the first rubber sealing ring 33, of one of the gear cavities 8, a first pressing flange 31 is fixedly installed on the surface of one side, close to the first pressing flange sealing ring 32, of one of the gear cavities 8, a second bearing 30 is fixedly installed on, one side surface of one gear cavity 8 close to the second bearing 30 is fixedly provided with a second sleeve ring 29;

a fourth rubber sealing ring 46 is fixedly installed on the inner wall of the other gear cavity 8, a third shaft sleeve 45 is fixedly installed on one side, close to the fourth rubber sealing ring 46, of the inner wall of the other gear cavity 8, a third rubber sealing ring 44 is fixedly installed on one side, close to the third shaft sleeve 45, of the inner wall of the other gear cavity 8, a second pressing flange sealing ring 43 is fixedly installed on one side, close to the third rubber sealing ring 44, of the inner wall of the other gear cavity 8, a second pressing flange 42 is fixedly installed on one side, close to the second pressing flange sealing ring 43, of the inner wall of the other gear cavity 8, a third bearing 41 is fixedly installed on one side, close to the second pressing flange sealing ring 42, of the inner wall of the other gear cavity 8, and a third sleeve 39 is fixedly installed on one side, close.

A first end cover sealing ring 7 is fixedly arranged between the first end cover 5 and the gear pump cavity 6, an air outlet 11 is fixedly arranged on the front surface of the gear pump cavity 6, an air outlet flange cover 10 is fixedly arranged at the front end of the air outlet 11, and an air outlet sealing ring 9 is fixedly arranged between the air outlet flange cover 10 and the air outlet 11; an air inlet 21 is fixedly mounted on the upper surface of the screw cavity 14, an air inlet flange cover 19 is fixedly mounted at the upper end of the air inlet 21, an air inlet sealing ring 20 is fixedly mounted between the air inlet flange cover 19 and the air inlet 21, a water nozzle 16 is fixedly mounted at a position, close to the upper end, of the front surface of the screw cavity 14, a second end cover 25 is fixedly mounted on one side, away from the gear pump cavity 6, of the screw cavity 14, a second end cover spring washer 24 and a second end cover sealing ring 26 are fixedly mounted between the second end cover 25 and the screw cavity 14, the second end cover spring washer 24 is mounted on the second end cover 25, the second end cover sealing ring 26 is mounted on the screw cavity 14, an oil seepage hole 18 is fixedly mounted on one side, close to the air inlet 21, of the upper surface of the screw cavity 14, and a;

the second rubber sealing ring 35, the second shaft sleeve 34, the first rubber sealing ring 33, the first pressing flange sealing ring 32, the first pressing flange 31, the second bearing 30 and the second sleeve ring 29 are sequentially in close contact, and the male gear 28 is fixedly installed at one end of the inner shaft of the male screw 12, which penetrates through the second rubber sealing ring 35, the second shaft sleeve 34, the first rubber sealing ring 33, the first pressing flange sealing ring 32, the first pressing flange 31, the second bearing 30 and the second sleeve ring 29; a first shaft sleeve 27 is fixedly installed on the inner side surface of the first end cover 5, and an output shaft of the coupling 4 is fixedly installed through the first shaft sleeve 27 and an inner shaft of the male screw 12;

the fourth rubber sealing ring 46, the third shaft sleeve 45, the third rubber sealing ring 44, the second pressing flange sealing ring 43, the second pressing flange 42, the third bearing 41 and the third sleeve 39 are sequentially in close contact, the female gear 40 is fixedly arranged at one end of the inner shaft of the female screw 13, which penetrates through the fourth rubber sealing ring 46, the third shaft sleeve 45, the third rubber sealing ring 44, the second pressing flange sealing ring 43, the second pressing flange 42, the third bearing 41 and the third sleeve 39, a stop washer 36 is fixedly mounted on the inner side surface of the first end cover 5 close to the first shaft sleeve 27 in turn, a gear baffle plate 37 is fixedly arranged on the surface of one side of the stop washer 36 far away from the first end cover 5, an expansion connecting sleeve 38 is fixedly arranged on the surface of one side, away from the stop washer 36, of the gear baffle 37, and the other end of the inner shaft of the female screw 13 is inserted into the expansion connecting sleeve 38 and rotatably arranged; the female gear 40 is in meshed connection with the male gear 28.

A use method of a mechanical seal chemical pump comprises the following steps:

the method comprises the following steps: the air inlet flange cover 19 on the air inlet 21 and the air outlet flange cover 10 on the air outlet 11 are disassembled, and the air inlet 21 is connected to the liquid outlet of the chemical liquid;

step two: starting a driving motor 1 on a motor base 2, driving the coupling 4 to rotate by the running driving motor 1, driving a male screw 12 to rotate by the rotating coupling 4 through an inner shaft of the male screw 12, driving a male gear 28 on the inner shaft of the male screw 12 to rotate, driving a female screw 13 to rotate by a female gear 40 on the inner shaft of the female screw 13 due to the meshed connection of the male gear 28 and the female gear 40, so that the female screw 13 and the male screw 12 rotate synchronously, inserting one end of the female screw 13 into one of the first bearings 23, inserting the other end of the female screw 13 into the expansion connecting sleeve 38 through a fourth rubber sealing ring 46, a third shaft sleeve 45, a third rubber sealing ring 44, a second compression flange sealing ring 43, a second compression flange 42, a third bearing 41 and a third sleeve 39, inserting one end of the male screw 12 into the other first bearing 23, and inserting the other end of the male screw 12 into the second rubber sealing ring 35, The second shaft sleeve 34, the first rubber sealing ring 33, the first pressing flange sealing ring 32, the first pressing flange 31, the second bearing 30, the second sleeve ring 29 and the output shaft of the coupler 4 are fixedly arranged;

step three: the rotating male screw 12 and female screw 13 generate suction force to suck chemical liquid from the air inlet 21 and then discharge the chemical liquid from the air outlet 11.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.