CN200940597Y

CN200940597Y - Novel thin acid pump

Info

Publication number: CN200940597Y
Application number: CN 200620132278
Authority: CN
Inventors: 季裕成
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-16
Filing date: 2006-08-16
Publication date: 2007-08-29
Anticipated expiration: 2016-08-16

Abstract

The utility model provides a new type diluted-acid pump, comprises a pump body which is provided with a liquid inlet and outlet. An impeller is arranged in the inner cavity of the pump body. The impeller is fixedly arranged on the end of the pump shaft which is driven by a motor. A sealing movable ring is arranged on the back-end part of the impeller. A sealing still ring is arranged in the pump to cooperate with the end face of the sealing movable ring. A spring is arranged between the back-end part of sealing still ring and the support box body which supports the pump shaft. The utility model is characterized in that both the sealing still ring and the sealing movable ring are whole silicon carbide, and a poly polyperfluoro propylene layer is stuck on the surface of the spring. The benefits of the utility model are as follow: the mechanical sealing part, which adopts whole silicon carbide, is anticorrosion and avoids the anticorrosion layer exfoliation problem of the exiting technology; the poly polyperfluoro propylene layer which is arranged on the spring can ensure that the spring is not corroded in medium and the spring pressure is kept; because the poly polyperfluoro propylene layer is stuck on the metal after melted, the poly polyperfluoro propylene layer is not easy to exfoliate.

Description

A kind of novel diluted acid pump

Technical field:

The utility model relates to a kind of acid medium pump, relates in particular to a kind of pump of carrying high temperature strong corrosive mediums such as diluted acid.

Background technique:

At present, acid-proof pump be in the Chemical Manufacture modal equipment it.Not only require to have very strong corrosion resistance for acid-proof pump, but also need the tool good sealing property.In order to solve the particularly corrosion protection problem of diluted acid pump of acid-proof pump, common method is at metal pump housing inside liner pottery, plastics, perhaps the anticorrosive coat made of anticorrosive paint (promptly with the pump housing that the high-temperature acidic medium contacts in, the end face of pump cover, impeller, the anticorrosive paint layer is coated on the pump shaft surface) in common acid-proof pump for the corrosion that solves the pump housing certain effect is arranged, but, there is a lot of deficiencys, for example: the inside liner pottery, plastics, perhaps anticorrosive paint, poor adhesive force between the anticorrosive coat and the pump housing, after using a period of time, anticorrosive coat just begins to produce the local shedding phenomenon, thereby has reduced the working life of acid-proof pump.Moreover, present inside lining anti-corrosive layer acid-proof pump, owing to exist the motion friction between liquid and the pump shaft, the as easy as rolling off a log wearing and tearing of pump shaft anticorrosive coat and shaft sealing cause poorly sealedly, spring also weares and teares easily as metallic material and loses elastic force, influences sealing effect.

Summary of the invention:

The utility model provides a kind of novel diluted acid pump, and its purpose is to solve the shortcoming that prior art exists, and improves the corrosion resistance of diluted acid pump, thereby improves its life-span.

For achieving the above object, adopt following technological scheme:

A kind of novel diluted acid pump, comprise the pump housing with liquid entering hole and liquid outlet, pump housing inner chamber is provided with impeller, impeller is installed in the end by motor-driven pump shaft, the impeller rearward end is installed with the sealing rotating ring, is arranged with in the pump housing and seals the stationary seal ring that the rotating ring end face cooperates, stationary seal ring ear end face and support that contact has spring between the supporting box of pump shaft, it is characterized in that: stationary seal ring and sealing rotating ring are whole silicon carbide, and even cloth is bonded with the perfluoroethylene-propylene layer on the spring surface.

Usefulness of the present utility model is: whole silicon carbide is partly adopted in mechanical seal, and is anticorrosive, avoids the prior art anticorrosive coat problem that comes off; Perfluoroethylene-propylene claims F46 again, be that tetrafluoroethylene and hexafluoropropene copolymerization form, its temperature resistant range-200-205 ℃, anti-strong acid, highly basic, hydrofluoric acid, chloroazotic acid and various organic solvent can be bonding with metal during molten state, therefore, the perfluoroethylene-propylene layer is set on the spring can guarantees that spring is not corroded in medium, keep spring pressure, because perfluoroethylene-propylene is bonding on metal after the fusion, so, difficult drop-off.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 the utility model structural representation

Embodiment

As shown in Figure 1, the utility model comprises a kind of novel diluted acid pump, it comprises the pump housing 1 with liquid entering hole 10 and liquid outlet 11, the pump housing 1 inner chamber is provided with impeller 2, impeller 2 is installed in the preceding end by motor-driven pump shaft 3, impeller 2 rearward end are installed with sealing rotating ring 4, be provided with stationary seal ring 5 in the pump housing 1, stationary seal ring 5 cooperates with end face with sealing rotating ring 4, contact has spring 7 between the supporting box 6 of stationary seal ring 5 ear end faces and support pump shaft 3, insert and in the groove 50 that is provided with on stationary seal rings 4 outer walls stationary seal ring 4 can not be rotated and be installed in projection 51 on the pump housing 1, but can move horizontally.

In the present embodiment, stationary seal ring 5 and sealing rotating ring 4 are whole silicon carbide, be bonded with one deck perfluoroethylene-propylene layer (i.e. Tong Cheng F46 layer, or claim fluorine-coating layer again) at the even cloth in spring 7 surface, thus this perfluoroethylene-propylene layer be cast in after the fusion on the spring 7 bonding with spring 7 metals.

In addition, the pump housing 1 adopts F46 not have the iron and steel inserts, so can not produce shelling or distortion, the pump housing 1 also can adopt the no iron and steel inserts of polyvinyladine floride (also becoming PVDF).Pump shaft 3 adopts the SS2324 dual phase steel, improves antiseptic property.Impeller 2 adopts hexagonal socket nut 21 lockings, uses 22 sealings of perfluoroethylene-propylene material (being the F46 material) nut then, and then impeller 2 inlet-duct areas increase, anti-gas corrosion of corresponding raising and efficient.

Claims

1, a kind of novel diluted acid pump, comprise the pump housing with liquid entering hole and liquid outlet, pump housing inner chamber is provided with impeller, impeller is installed in the end by motor-driven pump shaft, the impeller rearward end is installed with the sealing rotating ring, is arranged with in the pump housing and seals the stationary seal ring that the rotating ring end face cooperates, stationary seal ring ear end face and support that contact has spring between the supporting box of pump shaft, it is characterized in that: stationary seal ring and sealing rotating ring are whole silicon carbide, and even cloth is bonded with the perfluoroethylene-propylene layer on the spring surface.