CN205478369U - Single -stage section of thick bamboo bag canned motor pump - Google Patents
Single -stage section of thick bamboo bag canned motor pump Download PDFInfo
- Publication number
- CN205478369U CN205478369U CN201620132224.2U CN201620132224U CN205478369U CN 205478369 U CN205478369 U CN 205478369U CN 201620132224 U CN201620132224 U CN 201620132224U CN 205478369 U CN205478369 U CN 205478369U
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- pump
- pump body
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- section
- cylinder bag
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Abstract
The utility model discloses a single -stage section of thick bamboo bag canned motor pump, including the motor section that pump body subtotal and the pump body partially are connected, motor section is connected with the terminal box, pump body part, motor section and terminal box install in the inboard of section of thick bamboo bag, one end that the medium advances the pipe inner chamber through section of thick bamboo bag is linked together with pump intake in the pump body part, the other end that the medium advances the pipe is located the outside of section of thick bamboo bag, the medium discharge port in the pump body part meets with the one end of medium calandria, the other end of medium calandria is located the outside of section of thick bamboo bag, the terminal box be linked together through the outside of pipeline with section of thick bamboo bag. This pump simple structure, design benefit, it is rationally distributed, not only with low costs, guarantee the safety in production moreover.
Description
Technical field
This utility model relates to a kind of canned motor pump, particularly a kind of single-stage cylinder bag canned motor pump.
Background technology
No leakage canned motor pump used in oil, chemical field at present, in order to normally work, the net positive suction head of claimed apparatus is greater than NPSH, i.e. NPSHa > NPSHr, and the net positive suction head of device relatively low and in the case of this condition cannot be met, although can solve by the way of changing field device circuit design, but so can cause the change of the aspects such as technological design, time and effort consuming, and required cost is high.The most for the purpose of safety, the volume in the motor stator chamber of canned motor pump should be in a fixing scope, exceed this scope and then can there is bigger potential safety hazard, the particular location of rosette is then one of staple of volume size determining motor stator chamber, the concrete installation site of the rosette the most just determining canned motor pump is very restricted, it is impossible to be arbitrarily modified as required；Just owing to there being the strictest restriction, therefore cannot simply canned motor pump be improved so that it is be adapted to the working condition of low net positive suction head.
Summary of the invention
This utility model is to solve the above-mentioned deficiency existing for prior art, a kind of simple in construction is proposed, design ingenious, rationally distributed, can be on the premise of not changing device circuit design, the canned motor pump restriction requirement for motor stator chamber volume can either be met, the canned motor pump of normal work under the conditions of low device net positive suction head can be realized again.
Single-stage cylinder bag canned motor pump of the present utility model, including pump body portion and the motor part that is connected with pump body portion, motor part connects rosette, described pump body portion, motor part and rosette is installed on the inner side of cylinder bag, one end of medium inlet pipe is connected with the pump intake in pump body portion by the inner chamber of cylinder bag, the other end of medium inlet pipe is positioned at the outside of cylinder bag, and the medium outlet in pump body portion connects with one end of medium comb, and the other end of medium comb is positioned at the outside of cylinder bag；Described rosette by pipeline and cylinder bag be connected externally to lead to.
Single-stage cylinder bag canned motor pump of the present utility model, the top tube port position of wherein said cylinder bag is fixedly connected with cover, and described pump body portion, motor part are fixedly mounted on the inner side of described cover by connecting tube；Described rosette is connected with connecting tube by walking spool, connect in the outside of cover and have the outer tube being connected with connecting tube, the termination of outer tube is connected to external cabling box, the connecting line of the motor part in rosette by walking spool, connecting tube, outer tube are connected with external cabling box.Cover is provided with the valve of aerofluxus.
This utility model compared with the existing technology, has the advantage that
This kind of version be applicable to big flow low-lift, the canned motor pump of ultralow device net positive suction head, its simple in construction, design ingenious, rationally distributed.In some cases, owing to the net positive suction head of device is less than shielding NPSH, therefore the medium pump in device cannot be seen off with this canned motor pump, the layout again if carried out design pipeline then needs to expend substantial amounts of manpower, material resources and financial resources.If able to canned motor pump entirety is all placed in the pressure vessel (cylinder bag) being sunken to underground, artificial increase shielding pump lift, then can increase device net positive suction head, NPSH is allowed to be less than the net positive suction head of device, thus can normally use canned motor pump on the premise of not changing device circuit design, but owing to the volume in the motor stator chamber of canned motor pump has strict restriction for the purpose of safety, above-mentioned improvement therefore cannot be realized.The application is then creative while being put in cylinder bag by canned motor pump; one ground rosette being connected with the rosette of canned motor pump self of additional; and the connection utilizing one section of sealing pipe the two to be communicated protects; the canned motor pump of this structure had both met the requirement under low net positive suction head working environment; turn avoid because the volume in motor stator chamber becomes potential safety hazard that is big and that produce; not only low cost, and ensure safety in production.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model detailed description of the invention.
Detailed description of the invention
As shown in Figure 1: 17 is the pump body portion of canned motor pump, 1 is the motor part being connected with pump body portion 17, and the side of motor part 1 connects rosette 2.
14 is cylinder bag, the top tube port position of cylinder bag 14 has been bolted to connection cover 11, pump body portion 17, motor part 1 are fixedly mounted on the inner side of cover 11 by connecting tube 5, concrete mounting means is that one end of connecting tube 5 is fixed with the end cap 3 in motor part 1 and is connected, and the other end of connecting tube 5 is fixedly connected on below cover 11.Pump body portion 17, motor part 1 and rosette 2 is made to be respectively positioned on the inner chamber of cylinder bag 14.Cover 11 is provided with the valve 18 of aerofluxus.
Rosette 2 is connected with connecting tube 5 by walking spool 4, outer tube 9 is had by connection lid 10 connection in the outside of cover 11, connecting tube 5 is connected with outer tube 9, the termination of outer tube 9 is connected to external cabling box 8, the connecting line of the motor part 1 in rosette 2 by walking spool 4, connecting tube 5, outer tube 9 are connected with external cabling box 8.
One end of medium inlet pipe 6 is connected on cover 11, and the other end taps into pipe flange 7, and medium inlet pipe 6 is connected with the pump intake 16 in pump body portion 17 by the inner chamber of cylinder bag 14, and the one end being installed into pipe flange 7 is positioned at the outside of cylinder bag 14.Medium outlet in pump body portion 17 is connected by medium comb flange 15 with one end of medium comb 13, and medium comb 13 stretches out from cover 11, and the other end of medium comb 13 is positioned at the outside of cylinder bag 14 and is provided with outward flange 12.
When accommodating the net positive suction head of device of medium and being less (when the net positive suction head of device is less than shielding NPSH), first on the ground of suitable position, cylinder bag 14 is buried underground near device, before turn on pump, by medium inlet pipe 6 to the luminal perfusion medium of cylinder bag 14, and open the valve 18 for aerofluxus, and cylinder bag 14 is exhausted, the gas in pump body portion 17 and motor part 1 can be discharged by medium comb 13, valve is closed in aerofluxus the most afterwards, and opens canned motor pump.Due to this device artificial add shielding pump lift, so even the net positive suction head of device is relatively small, canned motor pump can also normally work, medium enters cylinder bag 14 inner chamber by medium inlet pipe 6, and enter the pump housing from pump intake 16, after being pressurizeed by impeller, discharge from medium comb 13, it is achieved the pumping of medium in device.When needing the medium in emptying cylinder bag 14 and the pump housing after termination of pumping, send nitrogen by nitrogen sparge tube road direction cylinder bag 14 inner tube, and medium is discharged from row's residual liquid flange；When needing canned motor pump is carried out the debugging on circuit or maintenance, it is only necessary to open and be positioned at external cabling box 8 on the ground.
Claims (2)
1. a single-stage cylinder bag canned motor pump, including pump body portion (17) and the motor part (1) that is connected with pump body portion (17), motor part (1) connects rosette (2), it is characterized in that: described pump body portion (17), motor part (1) and rosette (2) are installed on the inner side of cylinder bag (14), one end of medium inlet pipe (6) is connected with the pump intake (16) in pump body portion (17) by the inner chamber of cylinder bag (14), the other end of medium inlet pipe (6) is positioned at the outside of cylinder bag (14), medium outlet in pump body portion (17) connects with one end of medium comb (13), the other end of medium comb (13) is positioned at the outside of cylinder bag (14)；Described rosette (2) by pipeline and cylinder bag (14) be connected externally to lead to.
Single-stage cylinder bag canned motor pump the most according to claim 1, it is characterized in that: the top tube port position of described cylinder bag (14) is fixedly connected with cover (11), described pump body portion (17), motor part (1) are passed through connecting tube (5) and are fixedly mounted on the inner side of described cover (11)；Described rosette (2) is connected with connecting tube (5) by walking spool (4), connect in the outside of cover (11) and have the outer tube (9) being connected with connecting tube (5), the termination of outer tube (9) is connected to external cabling box (8), the connecting line of the motor part (1) in rosette (2) by walking spool (4), connecting tube (5), outer tube (9) are connected with external cabling box (8)；Cover (11) is provided with the valve (18) of aerofluxus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620132224.2U CN205478369U (en) | 2016-02-22 | 2016-02-22 | Single -stage section of thick bamboo bag canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620132224.2U CN205478369U (en) | 2016-02-22 | 2016-02-22 | Single -stage section of thick bamboo bag canned motor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205478369U true CN205478369U (en) | 2016-08-17 |
Family
ID=56678404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620132224.2U Active CN205478369U (en) | 2016-02-22 | 2016-02-22 | Single -stage section of thick bamboo bag canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205478369U (en) |
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2016
- 2016-02-22 CN CN201620132224.2U patent/CN205478369U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |