CN219733653U - Submerged pipeline type low-temperature pump - Google Patents
Submerged pipeline type low-temperature pump Download PDFInfo
- Publication number
- CN219733653U CN219733653U CN202321282865.2U CN202321282865U CN219733653U CN 219733653 U CN219733653 U CN 219733653U CN 202321282865 U CN202321282865 U CN 202321282865U CN 219733653 U CN219733653 U CN 219733653U
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- China
- Prior art keywords
- motor casing
- pump body
- sealed motor
- fixedly connected
- air
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- 238000005086 pumping Methods 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 14
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- 239000000411 inducer Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 46
- 239000003949 liquefied natural gas Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Abstract
The utility model provides a submersible pipeline type cryogenic pump, and belongs to the technical field of cryogenic pumps for liquefied natural gas transportation. The motor comprises a pump body and a sealed motor casing fixedly arranged in the pump body, wherein a rotor is arranged in the sealed motor casing, a pumping structure is arranged outside the sealed motor casing, the top end of the sealed motor casing is fixedly connected with a gas guide cover, the side wall of the gas guide cover is fixedly connected with an exhaust pipe communicated with the inside of the gas guide cover, one end of the exhaust pipe, which is far away from the gas guide cover, extends to the outside of the pump body, a through hole for communicating the inside of the sealed motor casing with the inside of the gas guide cover is formed in the top end of the sealed motor casing, and an air inlet pipeline structure communicated with the inside of the sealed motor casing is fixedly connected to the side wall of the sealed motor casing. The utility model can effectively reduce the heat conduction influence of the motor heat in the pump body on the liquefied gas and ensure the stable transportation of the liquefied gas.
Description
Technical Field
The utility model relates to the field of cryogenic pumps for liquefied natural gas transportation, in particular to a submersible pipeline type cryogenic pump.
Background
Cryogenic liquefied gases are often referred to simply as cryogenic liquids, since the temperature of the cryogenic liquid is well below ambient temperature and are typically in saturation. Under the heating action of the environment condition, the cryogenic liquid is vaporized, and the vaporization quantity is proportional to the quantity of heat transfer. Therefore, gas-liquid two-phase flow is formed in the low-temperature liquid conveying process, so that the conveying efficiency is affected, and the normal conveying is affected when the conveying is serious.
The patent application with the searched publication number of CN201358922Y discloses a submerged cryogenic pump for conveying liquefied natural gas, which comprises an impeller set, an impeller shell, a motor, a high-vacuum heat-insulating container, a radial bearing, a thrust belleville spring, a cable leading-out device, a flow director, an inducer, a sealing cover, a liquid discharge pipe and a radial support. According to the application, the evaporation gas outlet is formed in the high-vacuum heat-insulating container, so that the gas-liquid mixed flow is reduced, and the conveying efficiency is improved.
Because the motor of cryogenic pump sets up inside the container, and the motor needs to adopt sealed casing to seal, prevents that the motor is inside to contact with the liquefied gas, and the motor also can produce heat at operation in-process itself, and this part heat carries out the heat exchange with the liquefied gas that enters into the container inside through the mode of heat conduction, can aggravate the vaporization of liquefied gas, is unfavorable for the liquefied gas to carry with the mode of liquid.
How to invent a submerged pipeline type cryopump to improve the problems becomes a problem to be solved urgently by the person skilled in the art.
Disclosure of Invention
In order to make up for the defects, the utility model provides a submerged pipeline type cryogenic pump, which aims to solve the problem that the heating of a motor inside the cryogenic pump aggravates the vaporization of liquefied gas.
The utility model is realized in the following way:
the utility model provides a submersible pipeline type cryogenic pump which comprises a pump body and a sealed motor casing fixedly arranged in the pump body, wherein a rotor is arranged in the sealed motor casing, a pumping structure is arranged outside the sealed motor casing, an air guide cover is fixedly connected to the top end of the sealed motor casing, an exhaust pipe communicated with the inside of the air guide cover is fixedly connected to the side wall of the air guide cover, one end of the exhaust pipe away from the air guide cover extends to the outside of the pump body, a through hole for communicating the inside of the sealed motor casing with the inside of the air guide cover is formed in the top end of the sealed motor casing, an air inlet pipeline structure communicated with the inside of the sealed motor casing is fixedly connected to the side wall of the sealed motor casing, one end of the air inlet pipeline structure away from the sealed motor casing extends to the outside of the pump body, and a fan is fixedly installed along the edge of one end of the rotor, which is close to the air guide cover, extending to the inside of the air guide cover.
Preferably, the side wall of the pump body is respectively provided with a liquefied gas inlet and an evaporated gas outlet, and the evaporated gas outlet is positioned at a position of the pump body close to the top.
Preferably, the pumping structure comprises a drainage cover fixedly connected to the bottom end of the sealed motor casing and provided with an opening at the bottom, a guide pipe communicated with the inside of the drainage cover is fixedly connected to the outer side wall of the drainage cover, one end of the guide pipe, which is far away from the drainage cover, is fixedly connected with a liquefied gas discharge pipe, the liquefied gas discharge pipe penetrates through the top of the pump body and extends upwards, the bottom end of the rotor extends to the inside of the drainage cover, an impeller is fixedly installed on the side wall of the rotor, the impeller is located in the drainage cover, and an inducer is fixedly installed at the bottom end of the rotor.
Preferably, the air inlet pipeline structure comprises an air duct fixedly connected between the sealed motor casing and the pump body and communicated with the inside of the sealed motor casing, an air filtering structure is fixedly installed on the outer side wall of the pump body, the inside of the air filtering structure is communicated with the inside of the air duct, and one end of the air filtering structure, far away from the pump body, is fixedly connected with an air pipe.
Preferably, the air filtering structure comprises a shell fixedly mounted on the outer side wall of the pump body, a dustproof ventilation layer and a dehumidifying ventilation layer are arranged in the shell, and the ventilation pipe is fixedly connected to one end, far away from the pump body, of the shell and is communicated with the inside of the shell.
Preferably, the dustproof ventilation layer and the dehumidifying ventilation layer are both provided with multiple layers.
The beneficial effects of the utility model are as follows: through the cooperation use between sealed motor casing, the air guide cover, the blast pipe, air inlet pipeline structure, rotor and the fan, when carrying the liquefied gas, the rotation of rotor can make the inside fan of air guide cover constantly rotate, the below of fan forms the negative pressure, the air inlet of cooperation air inlet pipeline structure, can inhale the heat that produces in the sealed motor casing in the air guide cover and by the blast pipe discharge, reduce the heat in the sealed motor casing and to the gasification phenomenon of liquefied gas in the pump body, guarantee that liquefied gas is carried steadily in the pump body to the heat influences the liquefied gas in the pump body.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of an external appearance structure of a submersible pipeline type cryopump according to an embodiment of the present utility model;
FIG. 2 is a front view of a submersible pipeline type cryopump according to an embodiment of the present utility model;
FIG. 3 is a cross-sectional view of a submersible pipeline type cryopump according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of a gas filtering structure of a submersible pipeline type cryopump according to an embodiment of the present utility model.
In the figure: 1. a pump body; 2. a sealed motor casing; 3. a drainage cover; 4. an impeller; 5. an inducer; 6. an air guide cover; 7. a liquefied gas discharge pipe; 8. a conduit; 9. a rotor; 10. a fan; 11. a gas filtering structure; 111. a housing; 112. a dust-proof ventilation layer; 113. a moisture-removing ventilation layer; 12. a vent pipe; 13. an air duct; 14. an exhaust pipe; 15. a liquefied gas inlet port; 16. and an evaporation gas outlet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
Examples
Referring to fig. 1-4, a submersible pipeline type cryopump comprises a pump body 1 and a sealed motor casing 2 fixedly arranged inside the pump body 1, wherein a rotor 9 is arranged in the sealed motor casing 2, a pumping structure is arranged outside the sealed motor casing 2, an air guide cover 6 is fixedly connected to the top end of the sealed motor casing 2, an exhaust pipe 14 communicated with the inside of the air guide cover 6 is fixedly connected to the side wall of the air guide cover 6, one end of the exhaust pipe 14, which is far away from the air guide cover 6, extends to the outside of the pump body 1, a through hole for communicating the inside of the sealed motor casing 2 with the inside of the air guide cover 6 is formed in the top end of the sealed motor casing 2, an air inlet pipeline structure communicated with the inside of the sealed motor casing 2 is fixedly connected to the side wall of the sealed motor casing 2, one end of the air inlet pipeline structure, which is far away from the sealed motor casing 2, extends to the outside of the pump body 1, one end of the rotor 9, which is close to the air guide cover 6, extends to the inside of the air guide cover 6, and a fan 10 is fixedly mounted. The two ends of the rotor 9 are connected with the end part of the sealed motor casing 2 by adopting bearings and are correspondingly sealed.
The air inlet pipeline structure comprises an air duct 13 fixedly connected between the sealed motor casing 2 and the pump body 1 and communicated with the inside of the sealed motor casing 2, an air filtering structure 11 is fixedly installed on the outer side wall of the pump body 1, the inside of the air filtering structure 11 is communicated with the inside of the air duct 13, and one end, away from the pump body 1, of the air filtering structure 11 is fixedly connected with an air pipe 12. The air filtering structure 11 comprises a shell 111 fixedly mounted on the outer side wall of the pump body 1, a plurality of dustproof air permeable layers 112 and dehumidifying air permeable layers 113 are arranged in the shell 111, and the air pipe 12 is fixedly connected to one end, far away from the pump body 1, of the shell 111 and is communicated with the inside of the shell 111. The inside of the sealed motor casing 2 is communicated with the inside of the casing 111 through an air duct 13, an exhaust pipe 14 is used for air outlet, and an air duct 12 is used for air inlet. The exhaust pipe 14, the air duct 13 and the vent pipe 12 are all made of heat insulation materials, so that the heat conduction effect in the air inlet and outlet processes of the pipelines (the air duct 13, the vent pipe 12 and the exhaust pipe 14) is reduced.
The dustproof ventilation layer 112 can remove dust and filter the gas entering the shell 111 through the ventilation pipe 12, and the dehumidifying ventilation layer 113 can dehumidify and filter the gas, so that the damage of dust and moisture in the external gas to the inner parts of the sealed motor casing 2 is avoided.
The side wall of the pump body 1 is respectively provided with a liquefied gas inlet 15 and an evaporated gas outlet 16, and the evaporated gas outlet 16 is positioned at a position close to the top of the pump body 1.
The pumping structure includes that fixed connection has open-ended drainage cover 3 in sealed motor casing 2 bottom and bottom, fixedly connected with and the inside pipe 8 that is linked together of drainage cover 3 on the lateral wall of drainage cover 3, and the one end fixedly connected with liquefied gas discharge pipe 7 of drainage cover 3 is kept away from to pipe 8, and liquefied gas discharge pipe 7 runs through the top of pump body 1 and upwards extends, and the bottom of rotor 9 extends to the inside of drainage cover 3, and fixed mounting has impeller 4 on the lateral wall of rotor 9, and impeller 4 is located drainage cover 3, and the bottom fixed mounting of rotor 9 has inducer 5.
The working principle of the submersible pipeline type cryogenic pump is as follows: when the liquefied gas is conveyed, the liquefied gas can enter the pump body 1 through the liquefied gas inlet 15, the rotation of the rotor 9 drives the inducer 5 and the impeller 4 to rotate, and the liquefied gas entering the pump body 1 can be pumped out through the guide pipe 8 and the liquefied gas discharge pipe 7 in sequence. The evaporation gas discharge port 16 is arranged to discharge evaporation gas generated in the pump body 1 out of the pump body 1, so that mixed gas-liquid flow conveying in the pump body 1 is reduced. In addition, the rotation of the rotor 9 can enable the fan 10 inside the air guide cover 6 to continuously rotate, negative pressure is formed below the fan 10, and hot air generated in the sealed motor casing 2 can be sucked into the air guide cover 6 through the through hole at the top of the sealed motor casing 2 by matching with air inlet of the air inlet pipeline structure and is discharged through the exhaust pipe 14, so that the influence of heat in the sealed motor casing 2 on the heat conduction of liquefied gas in the pump body 1 is reduced, the gas-liquid mixed flow conveying phenomenon of the liquefied gas in the pump body 1 is effectively reduced, and the stable conveying of the liquefied gas is ensured.
It should be noted that, specific model specifications of the motor need to be determined by selecting a model according to actual specifications of the device, and a specific model selection calculation method adopts the prior art in the field, so detailed description is omitted.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The utility model provides a submerged pipeline type cryopump, includes pump body (1) and fixed setting in the inside sealed motor casing (2) of pump body (1), be provided with rotor (9) in sealed motor casing (2), the outside of sealed motor casing (2) is provided with pumping structure, a serial communication port, the top fixedly connected with air guide cover (6) of sealed motor casing (2), fixedly connected with blast pipe (14) that are linked together with air guide cover (6) inside on the lateral wall of air guide cover (6), the one end that air pipe (14) were kept away from air guide cover (6) extends to the outside of pump body (1), the through-hole that is used for being linked together the inside of sealed motor casing (2) and the inside of air guide cover (6) is offered on the top of sealed motor casing (2), fixedly connected with on the lateral wall of sealed motor casing (2) is linked together with air inlet pipeline structure, air inlet pipeline structure keeps away from the one end of sealed motor casing (2) and extends to the outside of motor casing (1) and extends to the outside of rotor (6) and stretch to the inside of motor casing (6) along the outside of motor casing (6) and install fan (10).
2. The submersible pipeline type cryopump according to claim 1, wherein the side wall of the pump body (1) is provided with a liquefied gas inlet (15) and an evaporation gas outlet (16), respectively, and the evaporation gas outlet (16) is located at a position of the pump body (1) close to the top.
3. The submersible pipeline type cryopump according to claim 2, wherein the pumping structure comprises a drainage cover (3) fixedly connected to the bottom end of the sealed motor casing (2) and provided with an opening at the bottom, a guide pipe (8) communicated with the inside of the drainage cover (3) is fixedly connected to the outer side wall of the drainage cover (3), one end of the guide pipe (8) away from the drainage cover (3) is fixedly connected with a liquefied gas discharge pipe (7), the liquefied gas discharge pipe (7) penetrates through the top of the pump body (1) and extends upwards, the bottom end of the rotor (9) extends to the inside of the drainage cover (3), an impeller (4) is fixedly mounted on the side wall of the rotor (9), the impeller (4) is located in the drainage cover (3), and a inducer (5) is fixedly mounted at the bottom end of the rotor (9).
4. The submersible pipeline type cryopump according to claim 1, wherein the air inlet pipeline structure comprises an air duct (13) fixedly connected between the sealed motor casing (2) and the pump body (1) and communicated with the inside of the sealed motor casing (2), an air filtering structure (11) is fixedly installed on the outer side wall of the pump body (1), the inside of the air filtering structure (11) is communicated with the inside of the air duct (13), and one end, far away from the pump body (1), of the air filtering structure (11) is fixedly connected with an air pipe (12).
5. The submersible pipeline type cryopump according to claim 4, wherein the air filtering structure (11) comprises a housing (111) fixedly mounted on the outer side wall of the pump body (1), a dustproof ventilation layer (112) and a dehumidifying ventilation layer (113) are arranged inside the housing (111), and the ventilation pipe (12) is fixedly connected to one end, far away from the pump body (1), of the housing (111) and is communicated with the inside of the housing (111).
6. The submersible pipeline cryopump according to claim 5, wherein the dustproof ventilation layer (112) and the dehumidifying ventilation layer (113) are each provided with a plurality of layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321282865.2U CN219733653U (en) | 2023-05-22 | 2023-05-22 | Submerged pipeline type low-temperature pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321282865.2U CN219733653U (en) | 2023-05-22 | 2023-05-22 | Submerged pipeline type low-temperature pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219733653U true CN219733653U (en) | 2023-09-22 |
Family
ID=88053493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321282865.2U Active CN219733653U (en) | 2023-05-22 | 2023-05-22 | Submerged pipeline type low-temperature pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219733653U (en) |
-
2023
- 2023-05-22 CN CN202321282865.2U patent/CN219733653U/en active Active
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