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 秦晓华 侯建明 柳春发 姚兴胜 潘凤建 唐昊 潘耀东 于 2020-04-27 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及其使用方法,包括安装底座,所述安装底座的前后表面均固定安装有两个固定栓板,所述安装底座的上表面靠近一端的位置固安装有第一支撑架,所述安装底座的上表面靠近第一支撑架一侧的位置固定安装有第二支撑架,所述第一支撑架与第二支撑架的上端固定安装有驱动电机,所述安装底座的上表面靠近第二支撑架的一侧固定安装有第三支撑架。本发明中,叶轮具有较高的耐热、耐化学腐蚀、耐老化、防霉、防紫外线辐射等性能,高密度,高硬度,尺寸变形小,增加塑胶材料的拉伸强度,提高叶轮的耐用度,从而增加化学泵的使用寿命,泵盖、第一筒体、第二筒体之间采用机械密封,提高化学泵的密封性,提升化学泵的吸力。(The invention discloses a mechanical seal chemical pump and a using method thereof, and the mechanical seal chemical pump comprises an installation base, wherein two fixed bolt plates are fixedly installed on the front surface and the rear surface of the installation base, a first support frame is fixedly installed at a position, close to one end, of the upper surface of the installation base, a second support frame is fixedly installed at a position, close to one side of the first support frame, of the upper surface of the installation base, a driving motor is fixedly installed at the upper ends of the first support frame and the second support frame, and a third support frame is fixedly installed at one side, close to the second support frame, of the upper surface of the installation base. According to the invention, the impeller has higher heat resistance, chemical corrosion resistance, aging resistance, mildew resistance, ultraviolet radiation resistance and other performances, is high in density and hardness, is small in size deformation, increases the tensile strength of a plastic material, and improves the durability of the impeller, so that the service life of the chemical pump is prolonged, and the pump cover, the first cylinder and the second cylinder are mechanically sealed, so that the sealing performance of the chemical pump is improved, and the suction force of the chemical pump is improved.)

1. The utility model provides a mechanical seal chemical pump, its characterized in that, including installation base (1), the equal fixed mounting in surface has two gim peg boards (2) around installation base (1), the upper surface of installation base (1) is close to the position of one end and installs first support frame (3) admittedly, the upper surface of installation base (1) is close to the position fixed mounting of first support frame (3) one side has second support frame (4), the upper end fixed mounting of first support frame (3) and second support frame (4) has driving motor (5), one side fixed mounting that the upper surface of installation base (1) is close to second support frame (4) has third support frame (6), the last fixed surface of third support frame (6) installs the shaft coupling and keeps off cover (7), the shape that the shaft coupling kept off cover (7) is the arch, one side fixed mounting that the upper surface of installation base (1) is close to second support frame (4) has fourth support frame (4), (2) 8) An L-shaped fixing plate (9) is fixedly mounted on the upper surface of the fourth supporting frame (8), a fixing plate (10) is fixedly mounted on the surface of one side of the L-shaped fixing plate (9) in the vertical direction, a first cylinder (11) is fixedly mounted on the upper surface of the fixing plate (10), a first cavity (23) is formed in the first cylinder (11), two fifth supporting frames (13) which are perpendicular to the fourth supporting frame (8) are fixedly mounted on one side, close to the fourth supporting frame (8), of the upper surface of the mounting base (1), supporting seats (14) are fixedly mounted at the upper ends of the two fifth supporting frames (13), the supporting seats (14) and the fifth supporting frames (13) are fixedly mounted through fixing bolts (15), and pump covers (16) are fixedly mounted at the upper ends of the supporting seats (14);

the inner circular wall of the first barrel (11) close to two sides is fixedly provided with sealing baffles (24), the inner side surfaces of the two sealing baffles (24) are fixedly provided with bearings (25), a connecting shaft (22) is rotatably arranged between the two bearings (25), one end of the connecting shaft (22) penetrates through one sealing baffle (24) and extends into the shaft coupling blocking cover (7), a shaft coupling (21) is arranged between the output shaft of the driving motor (5) and one end of the connecting shaft (22), the shaft coupling (21) is positioned inside the arch of the shaft coupling blocking cover (7), the other end of the connecting shaft (22) extends into the second barrel (12), the inner circular wall of the pump cover (16) close to one side is fixedly provided with an isolating sleeve (31) extending into the second barrel (12), and the inner circular wall of the isolating sleeve (31) is rotatably provided with an outer magnetic rotor (27), the impeller structure is characterized in that an impeller shaft (32) is fixedly installed in the middle of the outer magnetic rotor (27), the impeller shaft (32) extends into the pump cover (16), an impeller (29) is fixedly installed on the arc side face of the impeller shaft (32) extending into the pump cover (16), an impeller nut (28) is fixedly installed at one end of the impeller shaft (32), an inner magnetic rotor (26) is fixedly installed on the arc side face of the connecting shaft (22) located inside the second cylinder (12), and the inner magnetic rotor (26), the outer magnetic rotor (27) and the second cylinder (12) are coaxially arranged.

2. A mechanically sealed chemical pump according to claim 1, characterized in that said impeller (29) consists of the following materials, in mass%: 80-90% of AS resin, 15-25% of glass fiber, 1.0-5.0% of carbon fiber, 5-10% of mica, 0.1-1.5% of first silane coupling agent, 0.1-1.5% of second silane coupling agent, 0.2-2.0% of cyclic anhydride compatilizer, 0.5-1.0% of ethoxylated lauramide, 0.2-1.0% of antibacterial agent, 0.5-2.0% of ethylene bis stearamide, 0.5-3.0% of EVA, 0.5-2.0% of halogen-free flame retardant, 0.5-2.0% of antioxidant, 0.1-1.0% of light stabilizer and 0.1-1.0% of heat stabilizer.

3. The mechanically-sealed chemical pump according to claim 2, wherein the antioxidant is selected from one or more of an antioxidant 1010, an antioxidant 1076, an antioxidant CA, an antioxidant DNP and an antioxidant MB, the halogen-free flame retardant is selected from a nitrogen-based flame retardant or a nitrogen-phosphorus intumescent flame retardant, the light stabilizer is selected from a hindered amine-type light stabilizer and a benzothiazole-type ultraviolet absorber, and the heat stabilizer is selected from a calcium-zinc stabilizer.

4. The mechanical seal chemical pump according to claim 2, wherein the first silane coupling agent and the second silane coupling agent are silane coupling agent kh560 and silane coupling agent KBM-403, respectively.

5. A mechanically sealed chemical pump according to claim 1, characterised in that the impeller (29) is prepared by a method comprising: mixing AS resin, mica, a first silane coupling agent and a second silane coupling agent in a high-speed mixer for 10-15 min; placing the mixture into a main feeding port of a double-screw extruder, adding glass fiber, carbon fiber and other additives from a side feeding port, performing melt extrusion, cooling by a water tank, granulating, drying, and mixing to obtain injection molding particles; the injection molding particles are added into an injection molding machine for injection molding to obtain the impeller (29).

6. The mechanical seal chemical pump according to claim 1, wherein a second cavity (30) is formed inside the pump cover (16), a second cylinder (12) is fixedly mounted between the pump cover (16) and the first cylinder (11), a feed inlet (17) is fixedly mounted on the surface of one side of the pump cover (16), a first flange seat (18) is fixedly mounted on the circular arc side surface of the feed inlet (17), a discharge outlet (19) is fixedly mounted at the upper end of the pump cover (16), and a second flange seat (20) is fixedly mounted on the circular arc side surface of the discharge outlet (19).

7. A mechanically sealed chemical pump according to claim 1, characterized in that said impeller (29) comprises a sand core (2901), said sand core (2901) being fixed on its side with a plurality of blades (2902) distributed at equal angles.

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

the method comprises the following steps: with first support frame (3), second support frame (4), third support frame (6), fifth support frame (13) are all fixed on installation base (1), rethread four fixing bolt boards (2) are fixed installation base (1), rethread fixing bolt (15) are installed supporting seat (14) on fifth support frame (13), and install pump cover (16) on supporting seat (14), connect the chemical industry liquid inlet pipe on feed inlet (17) through first flange seat (18), rethread second flange seat (20) are connected the chemical industry liquid discharging pipe on discharge gate (19), install driving motor (5) on first support frame (3) and second support frame (4) again, keep off the cover (7) to install in third support frame (6) with the shaft coupling, adopt mechanical seal with pump cover (16), second barrel (12), The first cylinder body (11) is connected together, the first cylinder body (11) is fixed on a fourth supporting frame (8) through an L-shaped fixing plate (9) and a fixing plate (10), two ends of the first cylinder body (11) are mechanically sealed through sealing baffles (24), bearings (25) are respectively installed on the two sealing baffles (24), then a connecting shaft (22) is installed on the two bearings (25), one end of the connecting shaft (22) is connected with an output shaft of a driving motor (5) through a coupler (21), the other end of the connecting shaft (22) extends into the second cylinder body (12), an impeller (29) is installed on an impeller shaft (32) located in a pump cover (16), and an inner magnetic rotor (26) is installed on the connecting shaft (22) located in the second cylinder body (12);

step two: start first support frame (3), driving motor (5) on second support frame (4), driving motor (5) pass through shaft coupling (21) and drive connecting axle (22) and rotate, pivoted connecting axle (22) drive interior magnetic rotor (26) and rotate, thereby outer magnetic rotor (27) on spacer sleeve (31) also follow the rotation, outer magnetic rotor (27) drive impeller shaft (32) again and rotate, thereby drive impeller (29) and rotate, impeller (29) high-speed rotation produces centrifugal force, thereby inhale chemical industry liquid from feed inlet (17), discharge gate (19) are located to discharge again.

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, the situation of liquid leakage is easy to occur after long-term use, so that the suction force is reduced, and the impeller of the chemical centrifugal pump has no higher heat resistance, chemical corrosion resistance, aging resistance, mildew resistance, ultraviolet radiation resistance and other performances, so that the service life of the chemical centrifugal pump is short.

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, wherein an impeller has higher heat resistance, chemical corrosion resistance, aging resistance, mildew resistance, ultraviolet radiation resistance and other performances, high density, high hardness and small size deformation, the tensile strength of a plastic material is increased, and the durability of the impeller is improved, so that the service life of the chemical pump is prolonged, and mechanical seal is adopted among a pump cover, a first cylinder and a second cylinder, so that the sealing performance of the chemical pump is improved, and the suction force of the chemical pump is improved.

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

a mechanical seal chemical pump comprises an installation base, wherein two fixing bolt plates are fixedly installed on the front surface and the rear surface of the installation base, a first support frame is fixedly installed at a position, close to one end, of the upper surface of the installation base, a second support frame is fixedly installed at a position, close to one side of the first support frame, of the upper surface of the installation base, a driving motor is fixedly installed at the upper ends of the first support frame and the second support frame, a third support frame is fixedly installed at one side, close to the second support frame, of the upper surface of the installation base, a coupler baffle cover is fixedly installed at the upper surface of the third support frame, the coupler baffle cover is arched, a fourth support frame is fixedly installed at one side, close to the second support frame, of the upper surface of the installation base, an L-shaped fixing plate is fixedly installed at the upper surface of the fourth support frame, and a fixing plate is fixedly, a first cylinder is fixedly arranged on the upper surface of the fixing plate, a first cavity is formed in the first cylinder, two fifth support frames which are perpendicular to the fourth support frames are fixedly arranged on one side, close to the fourth support frames, of the upper surface of the mounting base, a support seat is fixedly arranged at the upper ends of the two fifth support frames, the support seat and the fifth support frames are fixedly arranged through fixing bolts, and a pump cover is fixedly arranged at the upper ends of the support seats;

the inner circular walls of the first cylinder body close to the two sides are fixedly provided with sealing baffles, the inward sides of the two sealing baffles are fixedly provided with bearings, a connecting shaft is rotatably arranged between the two bearings, one end of the connecting shaft penetrates through one of the sealing baffles and extends into a coupling shield, a coupling is arranged between an output shaft of the driving motor and one end of the connecting shaft and is positioned inside the arch of the coupling shield, the other end of the connecting shaft extends into the second cylinder body, a spacer sleeve extending into the second cylinder body is fixedly arranged on the inner circular wall of the pump cover close to one side, an external magnetic rotor is rotatably arranged on the inner circular wall of the spacer sleeve, an impeller shaft is fixedly arranged in the middle of the external magnetic rotor and extends into the pump cover, an impeller is fixedly arranged on the side surface of the circular arc of the pump cover, and an impeller nut is fixedly arranged at one end of the impeller shaft, the inner magnetic rotor, the outer magnetic rotor and the second cylinder are coaxially arranged.

Further, the method comprises the following steps: the impeller is composed of the following materials in percentage by mass: 80-90% of AS resin, 15-25% of glass fiber, 1.0-5.0% of carbon fiber, 5-10% of mica, 0.1-1.5% of first silane coupling agent, 0.1-1.5% of second silane coupling agent, 0.2-2.0% of cyclic anhydride compatilizer, 0.5-1.0% of ethoxylated lauramide, 0.2-1.0% of antibacterial agent, 0.5-2.0% of ethylene bis stearamide, 0.5-3.0% of EVA, 0.5-2.0% of halogen-free flame retardant, 0.5-2.0% of antioxidant, 0.1-1.0% of light stabilizer and 0.1-1.0% of heat stabilizer.

Further, the method comprises the following steps: the antioxidant is selected from one of antioxidant 1010, antioxidant 1076, antioxidant CA, antioxidant DNP and antioxidant MB, which are mixed, the halogen-free flame retardant is selected from nitrogen flame retardant or nitrogen-phosphorus intumescent flame retardant, the light stabilizer is selected from hindered amine light stabilizer and benzothiazole ultraviolet absorbent, and the heat stabilizer is selected from calcium-zinc stabilizer.

Further, the method comprises the following steps: the first silane coupling agent and the second silane coupling agent are respectively a silane coupling agent kh560 and a silane coupling agent KBM-403.

Further, the method comprises the following steps: the preparation method of the impeller comprises the following steps: mixing AS resin, mica, a first silane coupling agent and a second silane coupling agent in a high-speed mixer for 10-15 min; placing the mixture into a main feeding port of a double-screw extruder, adding glass fiber, carbon fiber and other additives from a side feeding port, performing melt extrusion, cooling by a water tank, granulating, drying, and mixing to obtain injection molding particles; and adding the injection molding particles into an injection molding machine for injection molding to obtain the impeller.

Further, the method comprises the following steps: the improved pump cover is characterized in that a second cavity is formed in the pump cover, a second barrel is fixedly mounted between the pump cover and the first barrel, a feed inlet is fixedly mounted on the surface of one side of the pump cover, a first flange seat is fixedly mounted on the arc-shaped side surface of the feed inlet, a discharge outlet is fixedly mounted at the upper end of the pump cover, and a second flange seat is fixedly mounted on the arc-shaped side surface of the discharge outlet.

Further, the method comprises the following steps: the impeller comprises a sand core, and a plurality of blades which are distributed at equal angles are fixedly installed on the side surface of the sand core.

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

the method comprises the following steps: the first support frame, the second support frame, the third support frame and the fifth support frame are all fixed on the installation base, the installation base is fixed through four fixing bolt plates, the support seat is installed on the fifth support frame through the fixing bolts, the pump cover is installed on the support seat, a chemical liquid feeding pipe is connected to a feeding hole through a first flange seat, a chemical liquid discharging pipe is connected to a discharging hole through a second flange seat, a driving motor is installed on the first support frame and the second support frame, a coupling baffle cover is installed in the third support frame, the pump cover, the second cylinder body and the first cylinder body are connected together through mechanical sealing, the first cylinder body is fixed on the fourth support frame through an L-shaped fixing plate and a fixing plate, the two ends of the first cylinder body are mechanically sealed through sealing baffle plates, and bearings are respectively installed on the two sealing baffle plates, then, a connecting shaft is installed on the two bearings, one end of the connecting shaft is connected with an output shaft of the driving motor through a coupler, the other end of the connecting shaft extends into the second cylinder, an impeller is installed on an impeller shaft in the pump cover, and an inner magnetic rotor is installed on the connecting shaft in the second cylinder;

step two: start first support frame, the driving motor on the second support frame, driving motor passes through the shaft coupling and drives the connecting axle and rotate, and pivoted connecting axle drives interior magnetic rotor and rotates to the outer magnetic rotor on the spacer sleeve also then rotates, and outer magnetic rotor drives the impeller shaft again and rotates, thereby drives the impeller and rotates, and the high-speed rotation of impeller produces centrifugal force, thereby inhales chemical industry liquid from the feed inlet, discharges from the discharge gate again.

The invention has the beneficial effects that:

1. the impeller of the chemical pump takes glass fiber as a main body of a reinforcing material, and a small amount of carbon fiber is added, so that the axial flow impeller has higher heat resistance, chemical corrosion resistance, aging resistance, mildew resistance, ultraviolet radiation resistance and other performances, high density, high hardness, small size deformation and increased tensile strength of a plastic material; mica improves the heat-resistant temperature, shields ultraviolet rays, improves the insulating property, improves the dispersibility of glass fibers in the material, reduces the deformation of the material and improves the dimensional stability of the product; the silane coupling agent kh560 and the silane coupling agent KBM-403 are added, so that the binding force between the resin and the glass fiber and carbon fiber is improved, the strength and the electrical performance are improved, and the hydrophobicity is improved. The cyclic anhydride compatilizer improves the intermiscibility of the resin with the glass fiber and the carbon fiber; the ethoxylated lauramide enables the modified material to have antistatic performance; the antibacterial agent ECOFRESH enables the modified material to have antibacterial performance; the ethylene bis stearamide improves the processing performance of the material and improves the fluidity; the antioxidant improves the degradation temperature of the resin, the EVA improves the toughness of the material, the halogen-free flame retardant improves the flame retardance of the material, the light stabilizer improves the photodecomposition resistance of the material, the aging resistance is improved, and the thermal stabilizer improves the thermal decomposition resistance, so that the impeller has higher heat resistance, chemical corrosion resistance, aging resistance, mildew resistance, ultraviolet radiation resistance and other properties, high density, high hardness, small size deformation, increased tensile strength of the plastic material, and improved durability of the impeller.

2. The mechanical seal is adopted among the pump cover, the first barrel body and the second barrel body to improve the sealing performance of the chemical pump and improve the suction force of the chemical pump, the first support frame, the second support frame, the third support frame and the fifth support frame are all fixed on the installation base, the installation base is fixed through four fixing bolt plates, the support seat is installed on the fifth support frame through a fixing bolt, the pump cover is installed on the support seat, a chemical liquid feeding pipe is connected to a feeding hole through a first flange seat, a chemical liquid discharging pipe is connected to a discharging hole through a second flange seat, a driving motor is installed on the first support frame and the second support frame, a coupler blocking cover is installed in the third support frame, the mechanical seal is adopted to connect the pump cover, the second barrel body and the first barrel body together, the first barrel body is fixed on the fourth support frame through an L-shaped fixing plate and a fixing plate, the two ends of the first cylinder are mechanically sealed through the sealing baffle plates, the two sealing baffle plates are respectively provided with a bearing, then a connecting shaft is arranged on the two bearings, one end of the connecting shaft is connected with an output shaft of a driving motor through a coupler, the other end of the connecting shaft extends into the second cylinder, an impeller is arranged on an impeller shaft in the pump cover, and an inner magnetic rotor is arranged on the connecting shaft in the second cylinder; start first support frame, the driving motor on the second support frame, driving motor passes through the shaft coupling and drives the connecting axle and rotate, and pivoted connecting axle drives interior magnetic rotor and rotates to the outer magnetic rotor on the spacer sleeve also then rotates, and outer magnetic rotor drives the impeller shaft again and rotates, thereby drives the impeller and rotates, and the high-speed rotation of impeller produces centrifugal force, thereby inhales chemical industry liquid from the feed inlet, discharges from the discharge gate again.

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 a schematic diagram of the internal structure of a mechanically sealed chemical pump according to the present invention;

fig. 3 is a schematic view of the structure of the impeller of the present invention.

In the figure: 1. installing a base; 2. a fixed peg board; 3. a first support frame; 4. a second support frame; 5. a drive motor; 6. a third support frame; 7. a coupling shield; 8. a fourth support frame; 9. an L-shaped fixing plate; 10. a fixing sheet; 11. a first cylinder; 12. a second cylinder; 13. a fifth support frame; 14. a supporting seat; 15. a fixing bolt; 16. a pump cover; 17. a feed inlet; 18. a first flange seat; 19. a discharge port; 20. a second flange seat; 21. a coupling; 22. a connecting shaft; 23. a first cavity; 24. sealing the baffle; 25. a bearing; 26. an inner magnetic rotor; 27. an outer magnetic rotor; 28. an impeller nut; 29. an impeller; 2901. a sand core; 2902. a blade; 30. a second cavity; 31. an isolation sleeve; 32. an impeller shaft.

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 an installation base 1, two fixing bolt plates 2 are fixedly installed on the front and back surfaces of the installation base 1, a first support frame 3 is fixedly installed on the upper surface of the installation base 1 near one end, a second support frame 4 is fixedly installed on the upper surface of the installation base 1 near one side of the first support frame 3, a driving motor 5 is fixedly installed on the upper ends of the first support frame 3 and the second support frame 4, a third support frame 6 is fixedly installed on the upper surface of the installation base 1 near one side of the second support frame 4, a coupler shield 7 is fixedly installed on the upper surface of the third support frame 6, the coupler shield 7 is arched, a fourth support frame 8 is fixedly installed on the upper surface of the installation base 1 near one side of the second support frame 4, and an L-shaped fixing plate 9 is fixedly installed on the upper surface of the fourth support frame 8, a fixing piece 10 is fixedly installed on the surface of one side of the L-shaped fixing plate 9 in the vertical direction, a first barrel 11 is fixedly installed on the upper surface of the fixing piece 10, a first cavity 23 is formed in the first barrel 11, two fifth support frames 13 which are perpendicular to the fourth support frames 8 are fixedly installed on one side, close to the fourth support frames 8, of the upper surface of the installation base 1, supporting seats 14 are fixedly installed at the upper ends of the two fifth support frames 13, the supporting seats 14 and the fifth support frames 13 are fixedly installed through fixing bolts 15, and pump covers 16 are fixedly installed at the upper ends of the supporting seats 14;

the inner circular wall of the first barrel 11 close to two sides is fixedly provided with a sealing baffle plate 24, the inner side surfaces of the two sealing baffle plates 24 are fixedly provided with bearings 25, a connecting shaft 22 is rotatably arranged between the two bearings 25, one end of the connecting shaft 22 penetrates through one sealing baffle plate 24 and extends into the coupling shield 7, a coupling 21 is arranged between the output shaft of the driving motor 5 and one end of the connecting shaft 22, the coupling 21 is positioned inside the arch of the coupling shield 7, the other end of the connecting shaft 22 extends into the second barrel 12, the inner circular wall of the pump cover 16 close to one side is fixedly provided with an isolating sleeve 31 extending into the second barrel 12, the inner circular wall of the isolating sleeve 31 is rotatably provided with an external magnetic rotor 27, the middle part of the external magnetic rotor 27 is fixedly provided with an impeller shaft 32, the impeller shaft 32 extends into the pump cover 16, and the impeller shaft 32 extends into the circular side surface of the pump cover 16 and is fixedly provided with an impeller, an impeller nut 28 is fixedly installed at one end of the impeller shaft 32, an inner magnetic rotor 26 is fixedly installed on the arc side surface of the connecting shaft 22 located inside the second cylinder 12, and the inner magnetic rotor 26, the outer magnetic rotor 27 and the second cylinder 12 are coaxially arranged.

The impeller 29 is composed of the following materials by mass percent: 80-90% of AS resin, 15-25% of glass fiber, 1.0-5.0% of carbon fiber, 5-10% of mica, 0.1-1.5% of first silane coupling agent, 0.1-1.5% of second silane coupling agent, 0.2-2.0% of cyclic anhydride type compatilizer, 0.5-1.0% of ethoxylated lauramide, 0.2-1.0% of antibacterial agent, 0.5-2.0% of ethylene bis stearamide, 0.5-3.0% of EVA, 0.5-2.0% of halogen-free flame retardant, 0.5-2.0% of antioxidant, 0.1-1.0% of light stabilizer and 0.1-1.0% of heat stabilizer; the antioxidant is selected from one of antioxidant 1010, antioxidant 1076, antioxidant CA, antioxidant DNP and antioxidant MB, which are mixed, the halogen-free flame retardant is selected from nitrogen flame retardant or nitrogen-phosphorus intumescent flame retardant, the light stabilizer is selected from hindered amine light stabilizer and benzothiazole ultraviolet absorbent, and the heat stabilizer is selected from calcium-zinc stabilizer; the first silane coupling agent and the second silane coupling agent are respectively a silane coupling agent kh560 and a silane coupling agent KBM-403;

the preparation method of the impeller 29 comprises the following steps: mixing AS resin, mica, a first silane coupling agent and a second silane coupling agent in a high-speed mixer for 10-15 min; placing the mixture into a main feeding port of a double-screw extruder, adding glass fiber, carbon fiber and other additives from a side feeding port, performing melt extrusion, cooling by a water tank, granulating, drying, and mixing to obtain injection molding particles; adding the injection molding particles into an injection molding machine for injection molding to obtain an impeller 29;

a second cavity 30 is formed in the pump cover 16, a second cylinder 12 is fixedly installed between the pump cover 16 and the first cylinder 11, a feed port 17 is fixedly installed on the surface of one side of the pump cover 16, a first flange seat 18 is fixedly installed on the arc-shaped side surface of the feed port 17, a discharge port 19 is fixedly installed at the upper end of the pump cover 16, and a second flange seat 20 is fixedly installed on the arc-shaped side surface of the discharge port 19; the impeller 29 includes a sand core 2901, and a plurality of blades 2902 distributed at equal angles are fixedly installed on the side surface of the sand core 2901.

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

the method comprises the following steps: a first support frame 3, a second support frame 4, a third support frame 6 and a fifth support frame 13 are all fixed on an installation base 1, the installation base 1 is fixed through four fixing bolt plates 2, a support seat 14 is installed on the fifth support frame 13 through a fixing bolt 15, a pump cover 16 is installed on the support seat 14, a chemical liquid feeding pipe is connected to a feeding hole 17 through a first flange seat 18, a chemical liquid discharging pipe is connected to a discharging hole 19 through a second flange seat 20, a driving motor 5 is installed on the first support frame 3 and the second support frame 4, a coupling baffle cover 7 is installed in the third support frame 6, the pump cover 16, the second cylinder 12 and the first cylinder 11 are connected together through mechanical sealing, the first cylinder 11 is fixed on the fourth support frame 8 through an L-shaped fixing plate 9 and a fixing plate 10, and two ends of the first cylinder 11 are mechanically sealed through a sealing baffle plate 24, bearings 25 are respectively arranged on the two sealing baffles 24, then a connecting shaft 22 is arranged on the two bearings 25, one end of the connecting shaft 22 is connected with an output shaft of the driving motor 5 through a coupler 21, the other end of the connecting shaft 22 extends into the second cylinder 12, an impeller 29 is arranged on an impeller shaft 32 positioned in the pump cover 16, and an internal magnetic rotor 26 is arranged on the connecting shaft 22 positioned in the second cylinder 12;

step two: start first support frame 3, driving motor 5 on the second support frame 4, driving motor 5 passes through shaft coupling 21 and drives connecting axle 22 and rotate, pivoted connecting axle 22 drives interior magnetic rotor 26 and rotates, thereby outer magnetic rotor 27 on the spacer sleeve 31 also follows the rotation, outer magnetic rotor 27 drives impeller shaft 32 again and rotates, thereby drive impeller 29 and rotate, impeller 29 is high-speed rotatory to produce centrifugal force, thereby inhale chemical industry liquid from feed inlet 17, discharge 19 departments of follow discharge gate again discharge.