CN206175235U - High temperature high pressure water -feeding pump of stand alone type balance pipe - Google Patents
High temperature high pressure water -feeding pump of stand alone type balance pipe Download PDFInfo
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- CN206175235U CN206175235U CN201621180460.8U CN201621180460U CN206175235U CN 206175235 U CN206175235 U CN 206175235U CN 201621180460 U CN201621180460 U CN 201621180460U CN 206175235 U CN206175235 U CN 206175235U
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- balance
- pump
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- hood
- high pressure
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Abstract
The utility model provides a high temperature high pressure water -feeding pump of stand alone type balance pipe belongs to high temperature high pressure water -feeding pump technical field, concretely relates to high temperature high pressure water -feeding pump of stand alone type balance pipe. The utility model provides a simple structure, the installation is maintained conveniently, practices thrift the high temperature high pressure water -feeding pump of pipeline loss. The utility model discloses a having the pump body of water inlet and delivery port, being provided with chopped -off head impeller and multi -stage impeller on the pump shaft in the pump body, the end of the pump body is provided with the tail -hood, is provided with the balancing disk through the balancing sleeve on the pump shaft in the tail -hood, is provided with balance cylinder between balancing disk and the tail -hood, its characterized in that: middle section department corresponding to the chopped -off head impeller on the pump body is provided with the balanced interface of high pressure, is provided with the balanced interface of low pressure corresponding to balance cylinder on the tail -hood, be provided with the balance pipe between balanced interface of high pressure and the balanced interface of low pressure.
Description
Technical field
This utility model belongs to High Temperature High Pressure feedwater pump technical field, and in particular to a kind of high temperature of free-standing balance pipe is high
Pressure feed pump.
Background technology
Boiler feed pump is firepower（Heating power）The Important Auxiliary equipment equipment in power plant, the pot of traditional 80T/h~450T/h grades
Stove feed pump mainly adopts horizontal mono-hull centrifugal multistage pump multiple centrifugal pump.Its structure is：Impeller is installed on successively on pump shaft, during wheel rotation
Produced predominantly axially thrust is born by balancing frame or balancing drum combination balancing, remaining axial thrust by thrust bearing.Install
The tail-hood of water exit end is provided with balance pipe flange, water under high pressure is connected to into low-pressure area, realize balancing work.Due to pumped medium
To be close to the deaerated water of saturation, in order to prevent cavitation, balance pipe to be generally attached to the higher pump in oxygen-eliminating device or upright position
Entrance main pipe, does not allow for balance pipe to be connected directly to pump intake.The balance length of tube of this kind of arrangement is usually 15m~20m, is
Facilitate maintenance down to dismantle, between the balance pipe flange and oxygen-eliminating device or pump intake main pipe of tail-hood must be provided with stop valve.
After by long-term use, it is found that this kind of structure has the following disadvantages：1st, pumped medium is high temperature deaerated water, after life-time service, if
Cut-off defective valve, is also easy to produce latent defect point.
2nd, balance pipe range 15m~20m and must be provided with pipe-support when mounted, increased the workload of construction.
3rd, when multiple stage parallel connection of pumps runs, due to the fluctuation of inlet pressure, it is difficult to accurately by monitoring balance pipe pressure
Change to judge whether balancing frame or balancing drum wear and tear.
4th, water is connected to into eminence by the balance pipe flange of lower, increased pipeline loss, waste the energy.
The content of the invention
This utility model is aiming at the problems referred to above, there is provided a kind of simple structure, convenient for installation and maintenance, saves pipeline loss
High Temperature High Pressure feed pump.
In order to realize above-mentioned purpose of the present utility model, this utility model is adopted the following technical scheme that, this utility model bag
The pump housing with water inlet and outlet is included, first stage impeller and multi-stage impeller, the end of the pump housing are provided with the pump shaft in the pump housing
Tail-hood is provided with, balancing frame is provided with by balance set on the pump shaft in tail-hood, balance cylinder is provided between balancing frame and tail-hood,
It is characterized in that：Middle section on the pump housing corresponding to first stage impeller is provided with high-pressure balancing interface, and balance cylinder is corresponded on tail-hood
It is provided with low-pressure balance interface；Balance pipe is provided between high-pressure balancing interface and low-pressure balance interface.
As a kind of preferred version of the present utility model, circular separator tube is provided with the balance pipe.
Used as another kind of preferred version of the present utility model, the side on the first stage impeller corresponding to multi-stage impeller is arranged
There is the back blade of radial arrangement.
As the third preferred version of the present utility model, between the tail-hood and the pump housing and between balance set and the pump housing
It is provided with high strength graphite pad and O-ring seal.
The beneficial effects of the utility model：1st, this utility model is integrated in balance pipe on the pump housing, so as to be greatly shortened
The length of balance pipe, the high-pressure balancing interface being interfaced to from the low-pressure balance of tail-hood on the pump housing, balance pipe greatest length is general not
More than 2.0m.Stop valve need not be used, installation and cost of investment has been saved, latent defect leakage point is reduced.
2nd, balance pipe of the present utility model becomes the attached individual components of pump, facilitates installation, maintenance and the dismounting of whole pump.
3rd, when multiple stage parallel connection of pumps runs, balance pipe is independently of one another, non-interference, and the pressure change for monitoring balance pipe is more accurate
Really, technical Analysis are conducive to.
4th, structure is improved, and using high strength graphite pad and O-ring seal dual-seal, improves sealing effectiveness, and prolongation makes
Use the life-span.
5th, due to construction featuress of the present utility model, this utility model will be connected at first stage impeller using balance pipe with balance cylinder
It is logical, so as to the axial thrust that second level impeller is produced to impeller can be balanced；By arranging back blade on first stage impeller, can
To balance the part axial thrust of first stage impeller, remaining axial thrust is still born by the thrust bearing of pump shaft end.
6th, this utility model effectively absorption equilibrium Guan Yin can be expanded with heat and contract with cold by arranging circular separator tube on balance pipe
The deformation of generation, it is ensured that the stability of this utility model operation.
7th, the dual-seal that this utility model passes through setting high strength graphite pad and O-ring seal, can prevent balance
Chamber pressure is leaked caused by raising, and the high strength graphite pad and O-ring seal at tail-hood can also effectively prevent high temperature and high speed
Current wash away.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A portions enlarged drawing of Fig. 1.
Fig. 3 is the B portions enlarged drawing of Fig. 1.
1 it is pump shaft in accompanying drawing, 2 be first stage impeller, 3 be high-pressure balancing interface, 4 be balance pipe, 5 is for circular separator tube, 6
Multi-stage impeller, 7 be low-pressure balance interface, 8 be tail-hood, 9 be back blade, 10 be O-ring seal, 11 be high strength graphite pad,
12 is balance set, 13 is balancing frame, 14 is balance cylinder, 15 is water inlet, 16 is outlet.
Specific embodiment
This utility model includes the pump housing with water inlet 15 and outlet 16, and on the pump shaft 1 in the pump housing chopped-off head is provided with
Impeller 2 and multi-stage impeller 6, the end of the pump housing is provided with tail-hood 8, and balance set 12 is provided with balance on the pump shaft 1 in tail-hood 8
Disk 13, is provided with balance cylinder 14 between balancing frame 13 and tail-hood 8, it is characterised in that：Corresponding to the stage casing of first stage impeller 2 on the pump housing
Place is provided with high-pressure balancing interface 3, and balance cylinder 14 is provided with low-pressure balance interface 7 on tail-hood 8；High-pressure balancing interface 3
Balance pipe 4 is provided with and low-pressure balance interface 7 between.
As a kind of preferred version of the present utility model, circular separator tube 5 is provided with the balance pipe 4.
Used as another kind of preferred version of the present utility model, the side on the first stage impeller 2 corresponding to multi-stage impeller 6 sets
It is equipped with the back blade 8 of radial arrangement.
As the third preferred version of the present utility model, between the tail-hood 8 and the pump housing and balance set 12 and the pump housing
Between be provided with high strength graphite pad 10 and O-ring seal 9.
It is understood that above with respect to specific descriptions of the present utility model, be merely to illustrate this utility model and not
The technical scheme being limited to described by this utility model embodiment, it will be understood by those within the art that, still can be with
This utility model is modified or equivalent, to reach identical technique effect；As long as satisfaction uses needs, all in this reality
Within new protection domain.
Claims (4)
1. a kind of High Temperature High Pressure feed pump of free-standing balance pipe, including with water inlet（15）And outlet（16）The pump housing,
Pump shaft in the pump housing（1）On be provided with first stage impeller（2）And multi-stage impeller（6）, the end of the pump housing is provided with tail-hood（8）, tail-hood
（8）Interior pump shaft（1）It is upper to pass through balance set（12）It is provided with balancing frame（13）, balancing frame（13）And tail-hood（8）Between be provided with
Balance cylinder（14）, it is characterised in that：First stage impeller is corresponded on the pump housing（2）Middle section be provided with high-pressure balancing interface（3）, tail
Lid（8）It is upper to correspond to balance cylinder（14）It is provided with low-pressure balance interface（7）；High-pressure balancing interface（3）With low-pressure balance interface（7）
Between be provided with balance pipe（4）.
2. the High Temperature High Pressure feed pump of a kind of free-standing balance pipe according to claim 1, it is characterised in that：The balance
Pipe（4）On be provided with circular separator tube（5）.
3. the High Temperature High Pressure feed pump of a kind of free-standing balance pipe according to claim 1, it is characterised in that：The chopped-off head
Impeller（2）It is upper to correspond to multi-stage impeller（6）Side be provided with the back blade of radial arrangement（9）.
4. the High Temperature High Pressure feed pump of a kind of free-standing balance pipe according to claim 1, it is characterised in that：The tail-hood
（8）And the pump housing between and balance set（12）High strength graphite pad is provided with and the pump housing between（10）And O-ring seal
（9）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621180460.8U CN206175235U (en) | 2016-10-27 | 2016-10-27 | High temperature high pressure water -feeding pump of stand alone type balance pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621180460.8U CN206175235U (en) | 2016-10-27 | 2016-10-27 | High temperature high pressure water -feeding pump of stand alone type balance pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206175235U true CN206175235U (en) | 2017-05-17 |
Family
ID=58681821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621180460.8U Active CN206175235U (en) | 2016-10-27 | 2016-10-27 | High temperature high pressure water -feeding pump of stand alone type balance pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206175235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281860A (en) * | 2018-09-29 | 2019-01-29 | 四川德胜集团钒钛有限公司 | Balance device for water pump and balance method in high vanadium titanium steel production |
-
2016
- 2016-10-27 CN CN201621180460.8U patent/CN206175235U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281860A (en) * | 2018-09-29 | 2019-01-29 | 四川德胜集团钒钛有限公司 | Balance device for water pump and balance method in high vanadium titanium steel production |
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