CN2746164Y - Integrated pump of self priming pump - Google Patents

Abstract

The utility model discloses an integrated pump body of the self priming pump, belonging to the technical field of the machine manufacture. The utility model adopts the separating technical proposal that the pump body structure of the existing self priming pump is divided into an internal pump body and an external pump body along the separating line; the internal and external pump bodies can be assembled or disassembled in the art work assembly The swirl flow pump can be formed if the internal and external pump bodies are disassembled; the self priming pump can be formed if the internal and external pump bodies are assembled. Consequently, the problem that the structure of the internal and external pump bodies is quite complicated, the integrated casting is difficult, the difficulty of the casting is high, and the casting defect is caused easily, is overcome. The utility model adopts the pump body structure with separating type, divides the complicated pump body into two simple parts, and saves the cost; therefore, the casting becomes easy, and a pair of moulds can be used to produce two types of the pump body.

Description

The integrated pump housing of self-priming pump

Technical field:

The integrated pump housing of self-priming pump of the present utility model belongs to pump industry machine casting field.

Background technique:

The inside and outside pump body structure of existing self-priming pump is an integrally casting, complex structure, and the casting technique difficulty is big, causes casting defect easily.Comprise liquid storage cylinder in the outer pump housing, gas-liquid separation chamber, the return port below inner pump communicates with the inner pump active chamber, constitutes the axial backflow external mixture type system of pump, and after water pump quit work, pump was stopped the liquid that contains a constant volume in the chamber.When starting of pump station, liquid storage in the pump is under the effect of impeller, carrying air secretly is upwards dished out, the difference that the relies on liquids and gases proportion gas-liquid separation of the pump housing outside is indoor carries out gas-liquid separation, gas is gently then overflowed from outlet earlier, liquid heavily then in return port flows to the active chamber of inner pump again, mixes with gas again.So circulation is gone down, and gas is drained in suction pipe, and pump is just finished the self-priming process and carried out proper functioning.This is the working principle of self-priming pump.

Summary of the invention:

The purpose of this utility model is to adopt the split technological scheme, and the pump body structure of existing self-priming pump along decomposing line, is resolved into inner pump, the outer pump housing, and these inside and outside two pump housings can divide, can close when technology is assembled.Divide, can be assembled into torque flow pump; Close, can be assembled into self-priming pump.Along decomposing line, adopt the split technological scheme when design, casting work, assembling, the pump housing of self-priming pump is decomposed into the outer pump housing 1 and inner pump 3, and the outer pump housing 1 and inner pump 3 can divide, can close.With screw 7 the outer pump housing 1 and inner pump 3 are combined, driven the whole pump housing that return port 2 forms self-priming pump.Outside dismantling behind the pump housing 1, import and outlet port at inner pump 3 are welded inlet tube 8 and outer pipe 7 respectively, on inner pump, do not process return port 2, can weld pump pin 11 in case of necessity, the cutting inner pump is connected the end cylindrical to suitable dimension with back shroud, just formed the torque flow pump of general structure, torque flow pump that just can not self-priming.This pump ratio is with the efficient height of the self-priming pump of form, but this pump suction contains large particle solid and long fibre impurity-body, is widely used in fields such as municipal blowdown, river embankment breed, mining.Adopt this kind pump body structure to reduce die manufacturing cost widely, one secondary mould divides inner pump mould and outer pump housing mould, the inner pump mould not only can be used for casting the self-priming pump inner pump like this, can be used as the mould use that general centrifugal pump body is made again, the repeatability of having avoided mould to make like this.That is to say that two types the pump housing share a waterpower mould, has saved cost of production greatly.

Description of drawings:

Fig. 1 is the axial section schematic representation of the integrated pump housing of self-priming pump, has shown the decomposition line A-A interface of the inside and outside pump housing and the interface of decomposing line B-B.The integrated pump housing that has shown self-priming pump.Among the figure: the outer pump housing 1, return port 2, inner pump 3, interface A-A seal ring 4, screw 5, interface A-A separatrix 6, import and inlet tube 8, outlet and outer pipe 7, B-B separatrix, interface 9, interface B-B seal ring 10, pump pin 11.

Concrete technological scheme:

The pump housing of conventional self-priming pump is an integrally casting.Here, the integrated pump housing of self-priming pump be along interface A-A decompose line 6 and interface B-B decompose line 9 be split as inner pump 3 and outside 1 two of pump housings Pump Body Parts independently.Outside dismantling, behind the pump housing 1, weld inlet tube 8 and outer pipe 7 respectively, on inner pump 3, do not process return port 2, can weld pump pin 11 in case of necessity, just formed the torque flow pump of general structure at the import 8 and outlet 7 places of inner pump 3.

The outer pump housing 1, inner pump 3 after the separatrix socket of interface A-A, B-B, are tightened up by screw 5 connections, at the stop portion that connects, by placing seal ring 4 and seal ring 10.The integrated pump housing of self-priming pump is compared with common self-priming pump, has the advantage that can divide, can close, divides, and can be assembled into torque flow pump; Close, can be assembled into self-priming pump.The inside and outside pump housing of existing self-priming pump is casting integrated, and structure is very complicated, and the difficult casting of casting difficulty is big, causes casting defect easily.Integrate pump housing self-priming pump and adopt split type pump body structure, the multiple pump housing is resolved into two simple parts, make casting simple, the hydraulic performance of foundry goods is guaranteed: integrate pump housing self-priming pump and adopt split type pump body structure, by the pump housing being adopted the assembling of distinct methods promptly can realize the use of self-priming pump function, can realize general torque flow pump function use again: adopt this kind pump body structure to reduce die manufacturing cost widely, one secondary mould divides inner pump mould and outer pump housing mould, the inner pump mould not only can be used for casting the interior pump of self-priming pump not like this, can be used as the mould use that general centrifugal pump body is made again, the repeatability of having avoided mould to make like this.That is to say that two types pump share a waterpower mould, has saved cost of production greatly: integrate the self-priming pump that uses on pump housing self-priming pump and the current market and compare and reduced the difficulty that mould is made.

Claims (1)

1. the integrated pump housing of a self-priming pump is on the pump housing of self-priming pump, along inside and outside pump housing interface A-A decompose line (6) and interface B-B decomposition line (9) be split as inner pump (3) and outside (1) two of the pump housing independently, the Pump Body Parts that can divide, can close; The stop portion of the interface A-A of the inside and outside pump housing has seal ring (4), and the stop portion of interface B-B has seal ring (10), and available screw (5) makes up after with the outer pump housing (1) and inner pump (3) socket and tightens together, and opens return port (2) on inner pump (3); Also can remove the outer pump housing (1), on inner pump (3), not open return port (2), respectively at water intake and water outlet welding intake pipe (8) and outlet pipe (7).