CN215633784U

CN215633784U - Horizontal centrifugal pump made of steel-plastic composite material

Info

Publication number: CN215633784U
Application number: CN202122055417.6U
Authority: CN
Inventors: 葛建芬; 葛俊
Original assignee: BAIHONG INTERNATIONAL MACHINERY (SHANGHAI) CO LTD
Current assignee: BAIHONG INTERNATIONAL MACHINERY (SHANGHAI) CO LTD
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-01-25
Anticipated expiration: 2031-08-30

Abstract

The utility model relates to a horizontal centrifugal pump made of steel-plastic composite materials in the technical field of centrifugal pumps, which comprises a pump body, a motor, a supporting bearing seat, a coupler, a mechanical seal gland, a metal shell, a pump shaft and a bracket, wherein the motor is connected with the pump shaft through the coupler, and the horizontal centrifugal pump is characterized in that: the pump body comprises a pump shell, a pump cover, an impeller, a mechanical sealing seat and a mechanical sealing gland, wherein the pump shell, the pump cover, the impeller, the mechanical sealing seat and the mechanical sealing gland are made by one-time die pressing and cladding of a polyvinylidene fluoride cladding layer outside a steel framework; the mechanical seal comprises a mechanical seal static ring and a mechanical seal moving ring, the mechanical seal is sleeved outside the shaft sleeve and is fixed on the pump body through a mechanical seal gland. The utility model has the advantages of improving the corrosion resistance, prolonging the service life, reducing the maintenance cost and the like.

Description

Horizontal centrifugal pump made of steel-plastic composite material

Technical Field

The utility model relates to a horizontal centrifugal pump made of a steel-plastic composite material, which has high performance and corrosion resistance and belongs to the technical field of centrifugal pumps.

Background

The centrifugal pump is widely applied to liquid material conveying in the fields of steel, petroleum, chemical engineering and the like, and on the occasion of conveying strong corrosive fluid, the metal centrifugal pump cannot be used for a long time due to corrosion of the material, and the all-plastic centrifugal pump has short service life due to poor mechanical strength.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the existing centrifugal pump and provides the horizontal centrifugal pump made of the steel-plastic composite material, which is suitable for various severe environments, high in corrosion resistance and longer in service life.

The utility model is realized by the following technical scheme:

the utility model provides a steel-plastic composite's horizontal centrifugal pump, includes the pump body, motor, supports bearing frame, shaft coupling, mechanical seal gland, metal casing, pump shaft and support, and the motor passes through shaft coupling joint pump shaft, its characterized in that: the pump body comprises a pump shell, a pump cover, an impeller, a mechanical sealing seat and a mechanical sealing gland, wherein the pump shell, the pump cover, the impeller, the mechanical sealing seat and the mechanical sealing gland are made by one-time die pressing and cladding of a polyvinylidene fluoride cladding layer outside a steel framework; the mechanical seal comprises a mechanical seal static ring and a mechanical seal dynamic ring, and is sleeved outside the shaft sleeve and fixed on the pump body through a mechanical seal gland; the technical scheme is further explained as follows: the mechanical seal seat comprises a static ring seat and a movable ring seat, the movable ring seat and the impeller are of a split structure, and the movable ring seat and the impeller are made into a split structure, so that the whole impeller is required to be replaced when the movable ring seat of the mechanical seal is damaged, and the maintenance cost is reduced; the technical scheme is further explained as follows: the pump shell is a polyvinylidene fluoride plastic layer coated outside the nodular cast iron pump shell; the technical scheme is further explained as follows: one end of the static ring seat and one end of the movable ring seat are provided with a machine seal flushing fluid inlet, the machine seal flushing fluid inlet is provided with a throttle valve, the other ends of the static ring seat and the movable ring seat, which are opposite to the machine seal flushing fluid inlet, are provided with a machine seal flushing fluid outlet, and the machine seal flushing fluid outlet is connected to the inlet of the machine pump through a backflow pipeline; the technical scheme is further explained as follows: the average thickness of the plastic layers covered by the pump shell, the pump cover and the impeller is more than 20 mm.

The utility model has the characteristics of improving the corrosion resistance, prolonging the service life, reducing the maintenance cost and the like.

Drawings

FIG. 1 is a structural diagram of a horizontal centrifugal pump made of a steel-plastic composite material;

fig. 2 is an enlarged view of the mechanical seal arrangement.

Fig. 3 is an enlarged view of the integral structure of the moving ring seat and the impeller of the mechanical seal.

In the figure: the pump comprises a pump shell 1, an impeller 2, a pump cover 3, a pump shaft 4, a support 5, a mechanical seal gland 6, a support bearing seat 7, a coupling 8, a motor 9, a mechanical seal 10, a movable ring seat 11, a static ring seat 12, a mechanical seal movable ring 13, a mechanical seal static ring 14, a flushing fluid inlet 15 and a flushing fluid outlet 16.

Detailed Description

The utility model is further described with reference to the accompanying drawings in which:

as shown in the figure, the structure of the horizontal centrifugal pump made of the steel-plastic composite material comprises a pump shell 1, an impeller 2, a pump cover 3, a pump shaft 4, a support 5, a mechanical seal gland 6, a support bearing seat 7, a coupling 8, a motor 9, a mechanical seal 10, a moving ring seat 11, a static ring seat 12, a mechanical seal moving ring 13, a mechanical seal static ring 14, a flushing fluid inlet 15 and a flushing fluid outlet 16.

In order to solve the corrosion-resistant problem of the centrifugal pump, overcome the defect that the strength of the all-plastic pump body is not high at the same time, the utility model has proposed a centrifugal pump made of composite material of steel-plastic, the main body of the centrifugal pump is made of composite material of steel-plastic for pump casing, pump cover, impeller, mechanical seal seat and mechanical seal gland, made of steel-plastic, wrap up the polyvinylidene fluoride and tie up the layer by the disposable mould pressing outside the steel skeleton and make; the pump shell is formed by one-time compression molding of a fluorine full Plastic (PVDF) mould coated outside the nodular cast iron pump shell, and the average thickness of the pump shell, the pump cover and the impeller plastic is more than 20 mm; the pump shell can also adopt a pure all-plastic pump shell to be wrapped by a metal (nodular cast iron) shell, so that once the pump is impacted accidentally, the pump can be effectively protected from damaging the pure all-plastic pump shell and causing the risk of damaging the pump body.

As shown in figure 2, the mechanical seal adopts the split type of the movable ring seat and the impeller, so that the defect of overlarge cost caused by replacing the whole impeller when the movable ring seat of the mechanical seal is damaged is overcome, the movable ring seat can be replaced with minimum cost, and the service life of the all-plastic centrifugal pump is greatly prolonged.

Mechanical seal's machine seals quiet ring and machine and seals the rotating ring and cup joint outside the axle sleeve, forms the friction pair, and the one end of quiet ring seat and rotating ring seat is equipped with machine and seals the flush fluid entry, machine seals the flush fluid entry and is equipped with throttle valve, and the other end relative with machine seal flush fluid entry on quiet ring seat and the rotating ring seat is equipped with machine and seals the flush fluid export, and machine seals the flush fluid export and is connected to the machine pump entrance through backflow pipeline, and machine seals the rotating ring seat and cup joints outside the axle sleeve. Mechanical seal flush fluid gets into the mechanical seal flush fluid entry after the throttle valve throttle, gets into the vice cavity of friction that the mechanical seal moved, quiet ring formation from the mechanical seal flush fluid entry, plays cooling, lubrication action for the friction is vice, guarantees that mechanical seal does not cause mechanical seal to leak when the friction is vice to break away from because of negative pressure pump shaft vibration.

The present invention is not limited to the above description, and it is apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention.

Claims

1. The utility model provides a steel-plastic composite's horizontal centrifugal pump, includes the pump body, motor, supports bearing frame, shaft coupling, mechanical seal gland, metal casing, pump shaft and support, and the motor passes through shaft coupling joint pump shaft, its characterized in that: the pump body comprises a pump shell, a pump cover, an impeller, a mechanical sealing seat and a mechanical sealing gland, wherein the pump shell, the pump cover, the impeller, the mechanical sealing seat and the mechanical sealing gland are made by one-time die pressing and cladding of a polyvinylidene fluoride cladding layer outside a steel framework; the mechanical seal comprises a mechanical seal static ring and a mechanical seal moving ring, the mechanical seal is sleeved outside the shaft sleeve and is fixed on the pump body through a mechanical seal gland.

2. The horizontal centrifugal pump made of steel-plastic composite material according to claim 1, characterized in that: the mechanical seal seat comprises a static ring seat and a moving ring seat, and the moving ring seat and the impeller are of a split structure.

3. The horizontal centrifugal pump made of steel-plastic composite material according to claim 1, characterized in that: the pump shell is formed by coating a polyvinylidene fluoride plastic layer outside the nodular cast iron pump shell.

4. The horizontal centrifugal pump made of steel-plastic composite material according to claim 2, characterized in that: the one end of quiet ring seat and rotating ring seat is equipped with machine and seals the flush fluid entry, and machine seals the flush fluid entry and is equipped with throttle valve, and the other end relative with machine seal flush fluid entry on quiet ring seat and the rotating ring seat is equipped with machine and seals the flush fluid export, and machine seals the flush fluid export and is connected to the machine pump entrance through backflow pipeline.

5. The horizontal centrifugal pump made of steel-plastic composite material according to claim 1, characterized in that: the average thickness of the plastic layers covered by the pump shell, the pump cover and the impeller is more than 20 mm.