CN201269226Y - Back pumping type large slurry recirculation pump - Google Patents
Back pumping type large slurry recirculation pump Download PDFInfo
- Publication number
- CN201269226Y CN201269226Y CNU2008202248143U CN200820224814U CN201269226Y CN 201269226 Y CN201269226 Y CN 201269226Y CN U2008202248143 U CNU2008202248143 U CN U2008202248143U CN 200820224814 U CN200820224814 U CN 200820224814U CN 201269226 Y CN201269226 Y CN 201269226Y
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- CN
- China
- Prior art keywords
- spiral case
- impeller
- suspension
- machine
- circulating pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a back-drawing type large slurry circulating pump, belonging to a pump used for medium convey equipment of the industries of desulfurition technique of electric power plants, chemicals and the like. The utility model is an improvement to the back-drawing type large slurry circulating pump, comprises an impeller, a spiral case and a shaft and is characterized in that the impeller (2) is arranged at one end of the shaft (10) of the spiral case (3); one end of the spiral case (3) is connected with an inlet short tube (1) and the other end thereof is connected with a suspension (7); a mechanical leaking rear guard plate (4) is arranged between the impeller (2) and the suspension (7) by a sealing ring. Compared with the prior art, the utility model has the advantages of having small volume, compact structure, high efficiency, energy saving and convenient disassembly and assembly, being capable of effectively improving the repairing efficiency and reducing the labor intensity of the maintenance and the like.
Description
Technical field
The large-scale slurry circulating pump of back-drawing belongs to industry medium transport such as power plant desulfurization technology and chemical industry and establishes stand by pump.It is improvement to large-scale slurry circulating pump.
Background technique
Along with the attention of country, strengthened control, according to the difference of the electric motor power of each power plant to power plant's SO2 emissions to environmental protection, its used slurry circulating pump is gradually to large scale development, flow is up to 14000 cubic metres/hour, even bigger, and impeller diameter reaches nearly 1 meter.This has higher requirement with regard to the M R of giving equipment.As shown in Figure 2, the large-scale slurry circulating pump of traditional middle open type, spiral case 15 is the seam location by apron plate 14 and back backplate 16, axially tighten and locate (front pump shell 13 and apron plate 14 all have coupling bolt to connect between back backplate 16 and the rear pump shell 17) by the bolt between front pump shell 13 and the rear pump shell 17.When pump uses a period of time, damage in impeller arrives to a certain degree, in the time of need changing, need dismantle into water short tube 12, front pump shell 13, apron plate 14, spiral case 15, fix the pump coupling then, pull down impeller, back backplate 16, rear pump shell 17 and Stuffing box (machine joint sealing) 18 successively, also could change mechanical seal then.If bearing needs to change, then need to dismantle the bolt between bay cover 20 and the pallet body 21, open bay cover 20, pull down pump coupling, round nut, bearing gland, bearing housing then successively, just can pull down bearing.Remove and install very trouble, take a lot of work, time-consuming.Very difficult during maintenance, labor strength is big.
The model utility content
The technical problems to be solved in the utility model is: overcome the problem that prior art exists, design and a kind ofly can improve overhaul efficiency effectively, alleviated the large-scale slurry circulating pump of improved back-drawing that keeps in repair labor intensity.
The technological scheme that its technical problem that solves the utility model adopts is: the large-scale slurry circulating pump of back-drawing, comprise impeller, spiral case and axle, it is characterized in that: impeller is installed in an end of axle in the spiral case, spiral case one end links to each other with the inlet short tube, the other end links to each other with suspension, and the machine backplate of being honored as a queen is installed between impeller and the suspension by seal ring.
The suspension front-end face is provided with and spiral case and the machine boss that backplate matches of being honored as a queen, and links to each other by bolt and spiral case and the machine backplate of being honored as a queen.
Be honored as a queen backplate front-end face and spiral case of machine matches, and ear end face and suspension match, and axis hole is opened at the center, and central shaft hole is greater than shaft diameter, and the machine envelope is installed in axle and machine and is honored as a queen between the central shaft hole of backplate.
Spiral case is for taking mouthful flange and lower margin monolithic construction out of.
Working principle
The shape line of impeller and the inner flow passage of spiral case design according to the mixed flow pump structure, the protecgulum strip back blade of impeller, its effect has reduced the leakage of medium to the pump intake direction, and the machine backplate of being honored as a queen also is with back blade, and its effect has been the axial force that reduced the sealing load of axle envelope and balance.
Compared with prior art, the beneficial effect that had of the large-scale slurry circulating pump of back-drawing of the present utility model is: have that relative volume is little, a compact structure, efficient height, energy-conservation and easy accessibility plurality of advantages.With a kind of pump of specification, under the prerequisite that satisfies flow and lift equally, can raise the efficiency 5-6%.The large-scale slurry circulating pump of this back-drawing is particularly suitable for and power plant desulfurization technology pump.This pump is fed sheet of a media pH value 2.5-13 in flue gas desulphurization system, the high-load 60000PPM of chlorion, and weight concentration is up to 60%.After using a period of time, its flow passage components can be worn, when needs are changed impeller, do not need moving inlet and outlet pipe, connecting bolt between connecting bolt as long as dismantle between spiral case 3 and the suspension 7, suspension 7 and the support 11, just can change mechanical seal from axially extract out backward as needs with bearing support 8, suspension 7 assemblies and impeller 2 are whole, only need pull down stripping ring 6, impeller 2 and the machine backplate 4 of being honored as a queen and get final product.Significantly reduce engineering time, reduced labor intensity and manufacture cost, improved working efficiency.
Description of drawings
Fig. 1 is the large-scale slurry circulating pump sectional structure of a utility model back-drawing schematic representation;
Fig. 2 is the large-scale slurry circulating pump sectional structure of a prior art middle open type schematic representation.
Fig. 1 is a most preferred embodiment of the present utility model.
Among Fig. 1 and 2: 1 inlet short tube 2 impellers, 3 spiral cases, 4 machines backplate 5 machines of being honored as a queen seal 19 20 bay cover 21 pallet bodies of 10 11 supports of 6 machine seal rings, 7 suspension 8 bearing suppories, 9 stud, 12 water inlet short tube 13 front pump shell 14 apron plates, 15 spiral case 16 impellers, 17 rear pump shells, 18 Stuffing boxes (machine joint sealing).
Embodiment
Be described further below in conjunction with 1 pair of large-scale slurry circulating pump of the utility model back-drawing of accompanying drawing:
With reference to Fig. 1:
The large-scale slurry circulating pump of this back-drawing is mono-hull back-drawing structure.
The shape line of the impeller 2 of the large-scale slurry circulating pump of this back-drawing and the inner flow passage of spiral case 3 design according to the mixed flow pump structure, the protecgulum strip back blade of impeller 2, its effect has reduced the leakage of medium to the pump intake direction, the machine backplate 4 of being honored as a queen also is with back blade, and its effect has been the axial force that reduced the sealing load of axle envelope and balance.The pump of the prior art Fig. 2 that compares of the large-scale slurry circulating pump of this back-drawing has that relative volume is little, a compact structure, efficient height, energy-conservation and easy accessibility plurality of advantages.With a kind of pump of specification, under the prerequisite that satisfies flow and lift equally, can raise the efficiency 5-6%.
The overcurrent assembly of the large-scale slurry circulating pump of this back-drawing of Fig. 1 is made of be honored as a queen backplate 4, machine envelope 5, machine seal ring 6, suspension 7, bearing support 8, stud 9, axle 10, support 11 of inlet short tube 1, impeller 2, spiral case 3 and machine, spiral case 3 is for taking the independent part of mouthful flange and lower margin out of, its both ends of the surface all have the tapped hole that is used for connecting, one end and inlet short tube 1 connect, and the other end and suspension 7 connect.The axial seal of cavity medium is to seal by the machines envelope 5 that machine is honored as a queen in the backplate 4, and the machine backplate 4 (when for single mechanical end face seal) of being honored as a queen is the cone of mechanical closed chamber, and cavity volume is big, guarantees that mechanical seal can lubricate and cool off fully.The be honored as a queen size in the gap between the backplate 4 of impeller 2 and inlet short tube 1 and machine is bigger to pump performance and effectiveness affects, and its gap adjustment is to adjust by the stud bolt between suspension 7 and the bearing support 9 to finish, and is simple to operation.Because the medium of being carried contains solid particle, after using a period of time, its flow passage components can be worn, when needs are changed impeller 2, do not need moving inlet and outlet pipe, connecting bolt as long as dismantle between spiral case 3 and the suspension 7 and machine be honored as a queen connecting bolt between backplate 4 and the suspension 7 and the connecting bolt between suspension 7 and the support 11, just can bearing support 8, suspension 7 assemblies and impeller 2 is whole from axially extract out backward, change mechanical seal as needs, only need pull down stripping ring 6, impeller 2 and the machine backplate 4 of being honored as a queen and get final product.Change bearing as needs, then need dismantle the connecting bolt between lower suspension 7 and the bearing support 8, extract the bearing support assembly out, pull down round nut, bearing gland, pump shaft then.Can improve overhaul efficiency effectively, alleviate maintenance labor intensity.
Claims (4)
1, the large-scale slurry circulating pump of back-drawing, comprise impeller, spiral case and axle, it is characterized in that: impeller (2) is installed in an end of axle (10) in the spiral case (3), spiral case (3) one ends link to each other with inlet short tube (1), the other end links to each other with suspension (7), and the machine backplate (4) of being honored as a queen is installed between impeller (2) and the suspension (7) by seal ring.
2, the large-scale slurry circulating pump of back-drawing according to claim 1 is characterized in that: suspension (7) front-end face is provided with and spiral case (3) and the machine boss that backplate (4) matches of being honored as a queen, and links to each other by bolt and spiral case (3) and the machine backplate (4) of being honored as a queen.
3, the large-scale slurry circulating pump of back-drawing according to claim 1, it is characterized in that: be honored as a queen backplate (4) front-end face and spiral case (3) of machine matches, ear end face and suspension (7) match, axis hole is opened at the center, central shaft hole is greater than axle (10) diameter, and machine envelope (5) is installed in axle (10) and machine and is honored as a queen between the central shaft hole of backplate (4).
4, the large-scale slurry circulating pump of back-drawing according to claim 1 is characterized in that: spiral case (3) is for taking mouthful flange and lower margin monolithic construction out of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202248143U CN201269226Y (en) | 2008-12-01 | 2008-12-01 | Back pumping type large slurry recirculation pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202248143U CN201269226Y (en) | 2008-12-01 | 2008-12-01 | Back pumping type large slurry recirculation pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269226Y true CN201269226Y (en) | 2009-07-08 |
Family
ID=40841824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202248143U Expired - Lifetime CN201269226Y (en) | 2008-12-01 | 2008-12-01 | Back pumping type large slurry recirculation pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269226Y (en) |
-
2008
- 2008-12-01 CN CNU2008202248143U patent/CN201269226Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090708 |
|
| CX01 | Expiry of patent term |