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CN-224228921-U - Anti-corrosion centrifugal pump with sheath fluoroplastic layer

CN224228921UCN 224228921 UCN224228921 UCN 224228921UCN-224228921-U

Abstract

The utility model relates to an anti-corrosion centrifugal pump with a sheath fluoroplastic layer, wherein a main shaft anti-corrosion sheath is arranged at an axial gap between a machine seal and an impeller of the pump, and a liquid contact part between the main shaft anti-corrosion sheath and a pump cavity of the pump is coated with the sheath fluoroplastic layer. The utility model has the advantages that the main shaft anti-corrosion sheath is arranged at the axial clearance part between the movable ring seat of the double-end-face mechanical seal and the impeller of the pump, so that the anti-corrosion protection problem of the axial clearance on the main shaft is solved, and the liquid contact part between the main shaft anti-corrosion sheath and the pump cavity of the pump is coated with the sheath fluoroplastic layer (steel plastic coating structure) with anti-corrosion performance, so that the main shaft anti-corrosion sheath has the strength of metal and good anti-corrosion performance, the anti-corrosion problem of the main shaft of the centrifugal pump is solved, the mechanical strength requirement of the anti-corrosion sheath is met, the anti-corrosion grade is high, the main shaft anti-corrosion performance is good, and the anti-leakage performance of the axial clearance part is good.

Inventors

  • JIANG LONGFU
  • GUO DANFENG
  • JIANG LINGCHAO

Assignees

  • 宜兴市宙斯泵业有限公司

Dates

Publication Date
20260512
Application Date
20231120

Claims (6)

  1. 1. An anti-corrosion centrifugal pump with a sheath fluoroplastic layer comprises a main shaft (1), a shaft seal (31), a pump shell (30), an impeller (7), an impeller splicing cap (28), a pump cover (29), a bearing bracket (32), a bearing (33), a side cover (34), a coupler (35), a motor (36) and a mounting base (37), wherein the shaft seal (31) is a double-end-face mechanical seal (2), the mechanical seal (2) comprises a sealing box (21), a shaft sleeve (20), a movable ring (3), a movable ring seat (4), a stationary ring (8), a stationary ring seat (23), a spring (22), a cooling water sealing combination (24) and a positioning buckle (27), and a cooling water inlet (25) and a cooling water outlet (26) are formed in the sealing box (21), and the anti-corrosion centrifugal pump is characterized in that: The shaft sleeve (20) and the movable ring seat (4) are integrally formed; The movable ring seat (4) of the mechanical seal (2) is made of nonmetal materials; An axial gap (5) between the mechanical seal (2) and an impeller (7) of the pump is provided with a main shaft anti-corrosion sheath (6), and a liquid contact part between the main shaft anti-corrosion sheath (6) and a pump cavity of the pump is coated with a sheath fluoroplastic layer (9).
  2. 2. The anti-corrosion centrifugal pump with the sheath fluoroplastic layer according to claim 1, wherein the anti-corrosion sheath (6) of the main shaft and the sheath fluoroplastic layer (9) are integrally of a steel-plastic-coated structure.
  3. 3. The anti-corrosion centrifugal pump with the sheath fluoroplastic layer according to claim 2, wherein one end of the main shaft anti-corrosion sheath (6) extends radially outwards to form an L-shaped flanging.
  4. 4. The anti-corrosion centrifugal pump with the sheath fluoroplastic layer according to claim 1, wherein the sheath fluoroplastic layer (9) is made of fluorinated resin, rubber, polypropylene, polyethylene or ultra-high molecular weight polyethylene.
  5. 5. The anti-corrosion centrifugal pump with the sheath fluoroplastic layer according to claim 1 is characterized in that the movable ring (3) is embedded on the movable ring seat (4), or the movable ring (3) is in a sleeve shape, the movable ring (3) is sleeved on the periphery of the movable ring seat (4), and the anti-corrosion centrifugal pump is a front suction type centrifugal pump with a suction inlet in the axial direction, or a side suction type centrifugal pump with the suction inlet at the shaft side.
  6. 6. The corrosion-resistant centrifugal pump with a sheath fluoroplastic layer according to claim 1, wherein: The overflow part of the anti-corrosion centrifugal pump is made of plastic or ceramic; The impeller (7), the pump cover (29) and the pump shell (30) are made of steel lining ultra-high molecular weight polyethylene, or the impeller (7), the pump cover (29) and the pump shell (30) are made of plastic; The sealing box (21) is made of plastic, metal or resin; The movable ring seat (4) is made of poly perfluoroethylene propylene, and the shaft sleeve (20) is made of 304 stainless steel; The movable ring (3) and the stationary ring (8) are made of silicon carbide.

Description

Anti-corrosion centrifugal pump with sheath fluoroplastic layer Technical Field The utility model belongs to the technical field of corrosion prevention of centrifugal pumps, and particularly relates to a corrosion prevention centrifugal pump with a sheath fluoroplastic layer. Background In order to facilitate the installation and use of the machine seal, the machine seal can adapt to the axial space of a pump shaft, and an effective method is to design an L-shaped adjusting sleeve and an adjusting O-shaped sealing ring at one end of the machine seal. The seal can adapt to the transportation of media containing chloride ions and fluoride ions, and can not be corroded when being applied to the working conditions. In the prior art, the manufacturing material of the L-shaped adjusting sleeve is stainless steel material, the corrosion resistance level of the mechanical seal is low, the corrosion requirement of a conveying medium is not high, the corrosion requirement is improved after the mechanical seal of the L-shaped adjusting sleeve with the axial distance is made of nonmetal material, and the stainless steel corrosion protection sleeve cannot meet the requirement, but if the sleeve with the installation distance section of the main shaft is made of ceramics and plastics, the strength is not enough, and the problem of main shaft corrosion protection exists. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provide the anti-corrosion centrifugal pump with the sheath fluoroplastic layer, which has high anti-corrosion grade, good main shaft anti-corrosion performance and good anti-leakage performance of the axial gap part. The anti-corrosion centrifugal pump with the sheath fluoroplastic layer comprises a main shaft, a shaft seal, a pump shell, an impeller splicing cap, a pump cover, a bearing bracket, a bearing, a side cover, a coupler, a motor and a mounting base, wherein the shaft seal is a double-end-face machine seal; The shaft sleeve and the movable ring seat are integrally formed; The movable ring seat of the mechanical seal is made of nonmetal materials; A spindle anti-corrosion sheath is arranged at the axial clearance between the machine seal and the impeller of the pump, and a sheath fluoroplastic layer is coated at the position where the spindle anti-corrosion sheath is in liquid contact with the pump cavity of the pump. Preferably, the anti-corrosion sheath of the main shaft and the fluoroplastic layer of the sheath are integrally of a steel-plastic coating structure. Preferably, one end of the main shaft anti-corrosion sheath extends radially outwards to form an L-shaped flanging. The sheath fluoroplastic layer is preferably made of fluorinated ethylene propylene, fluorine-containing resin, rubber, polypropylene, polyethylene or ultra-high molecular weight polyethylene. The anti-corrosion centrifugal pump is a front suction type centrifugal pump with a suction inlet at the axial direction or a side suction type centrifugal pump with the suction inlet at the shaft side. As preferable: The overflow part of the anti-corrosion centrifugal pump is made of plastic or ceramic; The impeller, the pump cover and the pump shell are made of steel lining ultra-high molecular weight polyethylene, or the impeller, the pump cover and the pump shell are made of plastic; The sealing box is made of plastic, metal or resin; the movable ring seat is made of poly-perfluoroethylene propylene, and the shaft sleeve is made of stainless steel; The movable ring and the stationary ring are made of silicon carbide. The utility model has the advantages that the main shaft anti-corrosion sheath is arranged at the axial clearance part between the movable ring seat of the double-end-face mechanical seal and the impeller of the pump, so that the anti-corrosion protection problem of the axial clearance on the main shaft is solved, and the liquid contact part between the main shaft anti-corrosion sheath and the pump cavity of the pump is coated with the sheath fluoroplastic layer (steel plastic coating structure) with anti-corrosion performance, so that the main shaft anti-corrosion sheath has the strength of metal and good anti-corrosion performance, the anti-corrosion problem of the main shaft of the centrifugal pump is solved, the mechanical strength requirement of the anti-corrosion sheath is met, the anti-corrosion grade is high, the main shaft anti-corrosion performance is good, and the anti-leakage performance of the axial clearance part is good. Drawings FIG. 1 is a schematic view of the structure of a sheath fluoroplastic layer at the contact position of a main shaft anti-corrosion sheath and liquid in a pump cavity of a pump; FIG. 2 is a schematic structural view of an anti-corrosive centrifugal pump with a sheath fluoroplastic layer; Fig. 3 is a schematic diagram of a preservative centrifugal pump. The reference numerals indicate that a main shaft 1, a movable ring 3, a movab