CN206175242U - External mixing type backward flow hole self -closing self priming pump - Google Patents
External mixing type backward flow hole self -closing self priming pump Download PDFInfo
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- CN206175242U CN206175242U CN201621223866.XU CN201621223866U CN206175242U CN 206175242 U CN206175242 U CN 206175242U CN 201621223866 U CN201621223866 U CN 201621223866U CN 206175242 U CN206175242 U CN 206175242U
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- self
- backwater
- return port
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- pipe
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Abstract
The utility model relates to an external mixing type backward flow hole self -closing self priming pump, including the pump body, the return bend of raising of intaking, import check valve, impeller, the impeller sets up in the spiral housing, and pump body inner chamber lower part is water inflow chamber, and upper portion is gas -liquid separation chamber, opens the backward flow hole that has the intercommunication spiral housing on the water inflow chamber wall thickness, is equipped with on the backward flow hole and normally opens return water skin door.
Description
Technical field
This utility model is related to a kind of self priming pump, specifically a kind of exterior mixing return port self-closing self priming pump.
Background technology
The return port design of traditional self priming pump is not close, pump after normal operation, pressure and pump discharge at blowback discharge orifice
Pressure is identical, and more than pressure in spiral case, therefore under normal circumstances, how many leakage rates of return port determines the efficiency of pump.
Ordinary circumstance, to guarantee gas-liquid separation in time, shortens self-priming time, and the size of general return port design is larger, and return port is in fortune
Vane edge is partly refluxed to during row, vertical impact is formed, causes pump hydraulic performance decline, these are that external-mix self-priming pump pump efficiency is low
One of the main reasons.
The content of the invention
For the problem that the self-priming efficiency of pump of prior art is reduced, this utility model provides a kind of simple structure, can have
Effect improves the exterior mixing return port self-closing self priming pump of pump efficiency.
The technical solution adopted in the utility model is：A kind of exterior mixing return port self-closing self priming pump, including the pump housing, raise
Water inlet bend pipe, import non-return valve, impeller, impeller is arranged in volute casing, and pump housing inner chamber bottom is backwater room, and top is gas-liquid point
From room, the return port of connection volute casing is provided with backwater room's wall thickness, it is characterised in that：The return port is provided with normally opened backwater skin
Door.
Further, return pipe is connected on the return port, normally opened backwater skin door is arranged at the outer spout of return pipe.
Further, the outer spout of the return pipe is downward-sloping inclined-plane, and normally opened backwater skin door is by deadweight correspondence backwater
The pipe mouth of pipe is vertically arranged.
Yet further, the backwater room is provided with visual backwater cavity lid.
Using above-mentioned technical proposal, the beneficial effects of the utility model are：Backwater cavity lid is designed with backwater room, chamber is opened
Lid, by conventional backflow hole return duct is provided with, and in return duct side skin door is designed with, and skin door is fixed by the metal of thin slice, skin
The sealing surface of door and the angled α in the downward-sloping inclined-plane of return pipe outer spout, under normal circumstances, backwater skin door is made in gravity
It is vertically arranged with, return pipe insertion blowback discharge orifice, and fastens.In self-priming state, backwater passes through gravity not after gas-liquid separation
It is disconnected that volute casing is entered by backwater room, return pipe, then gas-liquid separation is carried out with gas mixing by impeller rotation, move in circles.Now,
Due to being steam-water separation due to the main effect of impeller, lift is not set up, backwater cavity is less with volute casing pressure difference value, Pi Men
Because of deadweight and return pipe outer spout inclined-plane sealing surface natural separation, so as to ensure that backwater when self-priming is normally carried out.When pump it is complete
Into after self-priming, gas-liquid separation chamber's pressure rise is to, now backwater room and spiral case lower end return port pressure value generation consistent with lift
Larger difference, backwater outer spout inclined-plane sealing surface pressure reduction is larger, and under pressure, Pi Men is pasted with outer spout inclined-plane sealing surface
Close, return port closure, realize the automatic closure of service condition water pipe next time, pump now can ensure that and be damaged without backflow, so as to improve
The operational efficiency of pump.After parking, skin door naturally droops opening after backwater cavity pressure drop, and pump can reenter self-suction circulation
Pattern.Visual backwater cavity lid can conveniently monitor return port closure state, can be observed if necessary and adjust, and realize optimization.
Description of the drawings
Fig. 1 is this utility model structural representation.
In figure：The pump housing 1, bend pipe 2 of intaking, import check, 3, gas-liquid separation chamber 4, backwater room 5, backwater cavity lid 6, volute casing 7,
Impeller 8, return port 9, return pipe 10, normally opened backwater skin door 11.
Specific embodiment
It is described further below in conjunction with drawings and Examples.
Shown in Fig. 1：A kind of exterior mixing return port self-closing self priming pump is inverse including the pump housing 1, the water inlet bend pipe 2, import raised
Only valve 3, impeller 8, impeller 8 is arranged in volute casing 7, and the inner chamber bottom of the pump housing 1 is backwater room 5, and top is gas-liquid separation chamber 4, backwater
The return port 9 of connection volute casing 7 is provided with the wall thickness of room 5, return pipe 10 is connected on return port 9, normally opened backwater skin door 11 is arranged at back
The outer spout of water pipe, the outer spout of return pipe is downward-sloping inclined-plane, and normally opened backwater skin door is hung down by the deadweight correspondence return pipe mouth of pipe
Straight to arrange, backwater room is provided with visual backwater cavity lid 6.
Claims (4)
1. a kind of exterior mixing return port self-closing self priming pump, including the pump housing, water inlet bend pipe, import non-return valve, the impeller raised, leaf
Wheel is arranged in volute casing, and pump housing inner chamber bottom is backwater room, and top is gas-liquid separation chamber, and connection volute casing is provided with backwater room's wall thickness
Return port, it is characterised in that：The return port is provided with normally opened backwater skin door.
2. a kind of exterior mixing return port self-closing self priming pump according to claim 1, is characterized in that：Connect on the return port
There is return pipe, normally opened backwater skin door is arranged at the outer spout of return pipe.
3. a kind of exterior mixing return port self-closing self priming pump according to claim 2, is characterized in that：Outside the return pipe
The mouth of pipe is downward-sloping inclined-plane, and normally opened backwater skin door is vertically arranged by the deadweight correspondence return pipe mouth of pipe.
4. a kind of exterior mixing return port self-closing self priming pump according to claim 1, is characterized in that：The backwater room is provided with
Visual backwater cavity lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621223866.XU CN206175242U (en) | 2016-11-15 | 2016-11-15 | External mixing type backward flow hole self -closing self priming pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621223866.XU CN206175242U (en) | 2016-11-15 | 2016-11-15 | External mixing type backward flow hole self -closing self priming pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206175242U true CN206175242U (en) | 2017-05-17 |
Family
ID=58684685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621223866.XU Active CN206175242U (en) | 2016-11-15 | 2016-11-15 | External mixing type backward flow hole self -closing self priming pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206175242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499638A (en) * | 2016-11-15 | 2017-03-15 | 江苏芬奇工业设备制造有限公司 | A kind of exterior mixing return port self-closing self priming pump |
| CN110541830A (en) * | 2019-08-28 | 2019-12-06 | 中国计量大学 | Self-suction sewage pump with double-opening ring seal |
-
2016
- 2016-11-15 CN CN201621223866.XU patent/CN206175242U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499638A (en) * | 2016-11-15 | 2017-03-15 | 江苏芬奇工业设备制造有限公司 | A kind of exterior mixing return port self-closing self priming pump |
| CN110541830A (en) * | 2019-08-28 | 2019-12-06 | 中国计量大学 | Self-suction sewage pump with double-opening ring seal |
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