CN204511909U - Cantilever type submerged canned pump - Google Patents
Cantilever type submerged canned pump Download PDFInfo
- Publication number
- CN204511909U CN204511909U CN201520013223.1U CN201520013223U CN204511909U CN 204511909 U CN204511909 U CN 204511909U CN 201520013223 U CN201520013223 U CN 201520013223U CN 204511909 U CN204511909 U CN 204511909U
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- pump housing
- cylinder bag
- flange arrangement
- airtight flange
- canned
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Abstract
The utility model discloses a kind of cantilever type submerged canned pump, comprise the pump housing of canned motorpump, it is characterized in that: the described pump housing is all positioned at the cylinder bag being embedded in underground, what match with cylinder bag upper end open is provided with airtight flange arrangement, airtight flange arrangement offers sealable outlet pipe, airtight flange arrangement is also provided with the medium suction line communicated with cylinder bag inner chamber, the entry end of the pump housing is positioned at the bottom of cylinder bag, the outlet end of the pump housing is positioned at cylinder bag, and be connected with medium discharge duct road at the outlet end of the pump housing, the outlet on medium discharge duct road is positioned at cylinder bag outside, in the side of the pump housing, Packed underground box is set, this underground box is connected with the ground terminal box be arranged on above airtight flange arrangement by connection, therebetween connection is arranged in sealed pipe.
Description
Technical field
The utility model relates to a kind of canned motorpump, particularly a kind of cantilever type submerged canned pump.
Background technique
The No leakage canned motorpump used in current oil, chemical field, in order to can normally work, the net positive suction head of claimed apparatus is greater than NPSH, i.e. NPSHa>NPSHr, and when the net positive suction head of device lower and this condition cannot be met, although can be solved by the mode changing field device circuit design, the change of the aspects such as technological design can be caused like this, time and effort consuming, and required cost is high.For the purpose of safety simultaneously, the volume in the motor stator chamber of canned motorpump should in a fixing scope, exceed this scope and then can there is larger potential safety hazard, the particular location of terminal box is then one of staple of the volume size determining motor stator chamber, therefore the concrete mounting point also just determining the terminal box of canned motorpump is very restricted, and cannot arbitrarily change as required; Just owing to there being restriction strict like this, therefore simply cannot improve canned motorpump, make it be adapted to the working condition of low net positive suction head.
Summary of the invention
The utility model is the above-mentioned deficiency in order to solve existing for prior art, a kind of structure is proposed simple, design ingenious, rationally distributed, can under the prerequisite of not modifier circuit design, the restriction requirement of canned motorpump for motor stator chamber volume can either be met, the canned motorpump of normal work under can realizing again low device net positive suction head condition.
Technical solution of the present utility model is: a kind of cantilever type submerged canned pump, comprise the pump housing 1 of canned motorpump, it is characterized in that: the described pump housing 1 is all positioned at the cylinder bag 2 being embedded in underground, what match with cylinder bag 2 upper end open is provided with airtight flange arrangement 3, airtight flange arrangement 3 offers sealable outlet pipe, airtight flange arrangement 3 is also provided with the medium suction line 4 communicated with cylinder bag 2 inner chamber, the entry end of the pump housing 1 is positioned at the bottom of cylinder bag 2, the outlet end of the pump housing 1 is positioned at cylinder bag 2, and be connected with medium discharge duct road 6 at the outlet end of the pump housing 1, the outlet on medium discharge duct road 6 is positioned at cylinder bag 2 outside, in the side of the pump housing 1, Packed underground box 7 is set, this underground box 7 is connected with the ground terminal box 8 be arranged on above airtight flange arrangement 3 by connection, therebetween connection is arranged in sealed pipe 5.
Compared with the existing technology, tool has the following advantages the utility model:
The canned motorpump being applicable to low device net positive suction head of this kind of structural type, its structure is simple, designs ingenious, rationally distributed.In some cases, the net positive suction head due to device is less than shielding NPSH, therefore the medium pump in device cannot be seen off with this canned motorpump, if carry out the layout again designing pipeline, needs the manpower, material resources and financial resources of at substantial.Go if canned motorpump entirety all can be placed in the pressurized container (cylinder bag) being sunken to underground, artificial increase shielding lift of pump, then NPSH can be reduced, NPSH is allowed to be less than the net positive suction head of device, so just under the prerequisite of not modifier circuit design, normally can use canned motorpump, but because the volume in the motor stator chamber of canned motorpump has strict restriction for the purpose of safety, therefore above-mentioned improvement cannot be realized.The application is then creationary while canned motorpump is put into cylinder bag; additional ground terminal box be connected with the terminal box of canned motorpump self; and utilize one section of sealed pipe to be protected by the two connection carrying out communicating; namely the canned motorpump of this structure meets the requirement under low net positive suction head working environment; the volume that turn avoid because of motor stator chamber becomes large and potential safety hazard that is that produce; while saving design, improving cost, ensure safety in production.Therefore can say that it has possessed multiple advantage, be particularly suitable for applying in the art, its market prospects are very wide.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.As shown in Figure 1: a kind of cantilever type submerged canned pump, comprise the pump housing 1 of canned motorpump, it is inner that this pump housing 1 is all positioned at cylinder bag 2, cylinder bag 2 is then embedded in underground, what match with cylinder bag 2 upper end open is provided with airtight flange arrangement 3, airtight flange arrangement 3 is provided with the medium suction line 4 communicated with the inner chamber of cylinder bag 2, the entry end of the described pump housing 1 is positioned at the bottom of cylinder bag 2, and the outlet end of the pump housing 1 is positioned at cylinder bag 2, and be connected with medium discharge duct road 6 at the outlet end of the pump housing 1, the outlet on medium discharge duct road 6 is positioned at cylinder bag 2 outside, in the side of the pump housing 1, Packed underground box 7 is set, this underground box 7 is connected with ground terminal box 8 by connection, terminal box 8 is then arranged on the ground above airtight flange arrangement 3 on the ground, above-mentioned connection is arranged in sealed pipe 5, can't medium contact in cylinder bag 2.
The working procedure of the cantilever type submerged canned pump of the utility model embodiment is as follows: when the net positive suction head of the device holding medium is less (when the net positive suction head of device is less than shielding NPSH), first near device be applicable to position ground on cylinder bag 2 is buried underground, and the pump housing 1 is all placed in the interior wall of cylinder bag 2, then utilize airtight flange arrangement 3 to be sealed by cylinder bag 2; Before turn on pump, in the inner chamber of cylinder bag 2, pour into medium by medium suction line 4, and the outlet pipe on open end can bag 2 and the pump exhaust flange on the pump housing 1, be fully vented cylinder bag 2 and the pump housing 1, tank pump cuts out each gas exhaust piping fully afterwards, and opens canned motorpump.Due to this device artificial add shielding lift of pump, even if therefore the net positive suction head of device is relatively little, canned motorpump also can normally work, medium enters cylinder bag 2 inner chamber by medium suction line 4, and enter the pump housing 1 inner chamber from the entrance of the pump housing 1 lower end, after being pressurizeed by impeller, discharge from medium discharge duct road 6, the pumping of medium in implement device.When needing the medium in emptying cylinder bag 2 and the pump housing 1 after termination of pumping, send nitrogen by pipe in nitrogen sparge tube road direction cylinder bag 2, and medium is discharged from row's raffinate flange; When needing canned motorpump is carried out to the debugging on circuit or overhauls, owing to being connected by connection between underground box 7 and ground terminal box 8, therefore only needing to open a ground terminal box 8 and operating on it.
Claims (1)
1. a cantilever type submerged canned pump, comprise the pump housing (1) of canned motorpump, it is characterized in that: the described pump housing (1) is all positioned at the cylinder bag (2) being embedded in underground, what match with cylinder bag (2) upper end open is provided with airtight flange arrangement (3), airtight flange arrangement (3) offers sealable outlet pipe, airtight flange arrangement (3) is also provided with the medium suction line (4) communicated with cylinder bag (2) inner chamber, the entry end of the pump housing (1) is positioned at the bottom of cylinder bag (2), the outlet end of the pump housing (1) is positioned at cylinder bag (2), and be connected with medium discharge duct road (6) at the outlet end of the pump housing (1), the outlet on medium discharge duct road (6) is positioned at cylinder bag (2) outside, in the side of the pump housing (1), Packed underground box (7) is set, this underground box (7) is connected with the ground terminal box (8) being arranged on airtight flange arrangement (3) top by connection, therebetween connection is arranged in sealed pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520013223.1U CN204511909U (en) | 2015-01-09 | 2015-01-09 | Cantilever type submerged canned pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520013223.1U CN204511909U (en) | 2015-01-09 | 2015-01-09 | Cantilever type submerged canned pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204511909U true CN204511909U (en) | 2015-07-29 |
Family
ID=53709891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520013223.1U Active CN204511909U (en) | 2015-01-09 | 2015-01-09 | Cantilever type submerged canned pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204511909U (en) |
-
2015
- 2015-01-09 CN CN201520013223.1U patent/CN204511909U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |