CN218347589U

CN218347589U - Retractable in-tank high-pressure immersed pump

Info

Publication number: CN218347589U
Application number: CN202221366321.XU
Authority: CN
Inventors: 翟鲁涛; 岳军; 宗秀山
Original assignee: Zibo Boshan Lvyuan Gas Equipment Co ltd
Current assignee: Zibo Boshan Lvyuan Gas Equipment Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2023-01-20
Anticipated expiration: 2032-06-02

Abstract

The utility model discloses a high-pressure immersed pump in retractable jar relates to liquefied natural gas draw-out device technical field, including large-scale liquefied natural gas storage tank, the top fixed mounting of large-scale liquefied natural gas storage tank inner chamber has the pump well, the bottom dismantlement formula of pump well is connected with the installation base, fixed mounting has the suction section on the inner wall of installation base, the inside fixed mounting of suction section has the inducer, the inside fixed mounting of suction section has the baffle. The utility model discloses a design that the interlude is connected between liquid section and suction section for the dismantlement formula, can be with going out the top dismantlement of liquid section from the interlude down, then utilize external hoisting accessory to carry out the lifting to liquid section through the lug, carry out suitable quantity installation to the interlude again, realize carrying out the processing that changes to the quantity of stator and impeller, can be so that this pump's outlet pressure satisfies the different needs of high-pressure pipe network, reduce liquefied natural gas's extraction cost, promote the practicality of this pump.

Description

Retractable in-tank high-pressure immersed pump

Technical Field

The utility model relates to a liquefied natural gas draw-out device technical field, concretely relates to high-pressure immersed pump in retractable jar.

Background

The method is characterized in that the liquefied natural gas is pressurized, gasified and output, and is an important source of natural gas in a natural gas pipe network, the bottom of a large liquefied natural gas storage tank is not provided with an opening, a retractable immersed pump is required to be used when the liquefied natural gas is conveyed out of the storage tank, the liquefied natural gas is divided according to the pressure grade of the natural gas pipe network, 1.6-4.0 MPa belongs to a high-pressure pipe network, the outlet pressure of the immersed pump in the occasion is not less than the pressure required by the pipe network, and the high-pressure immersed pump is required to be adopted. The following problems exist in the prior art:

common immersed pump does not possess the function of change output pressure, and the pressure demand of different high-pressure pipe networks is different to some extent, when changing high-pressure pipe network and export, still need wholly change the immersed pump, consequently need use the immersed pump of multiple different models, leads to carrying out the cost-push that extracts to liquefied natural gas.

SUMMERY OF THE UTILITY MODEL

The utility model provides a but high-pressure immersed pump in retractable formula jar to solve the problem of proposing in the above-mentioned background art.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

high-pressure immersed pump in retractable jar, including large-scale liquefied natural gas storage tank, the top fixed mounting of large-scale liquefied natural gas storage tank inner chamber has the pump well, the bottom dismantlement formula of pump well is connected with the installation base, fixed mounting has the suction segment on the inner wall of installation base, the inside fixed mounting of suction segment has the inducer, the inside fixed mounting who inhales the segment has the baffle, the bottom of suction segment is provided with the O shape sealing washer that is located on the installation base.

The utility model discloses technical scheme's further improvement lies in: the bottom of the suction section is provided with a lower bearing chamber, and a lower bearing is arranged in an inner cavity of the lower bearing chamber.

The utility model discloses technical scheme's further improvement lies in: the top dismantlement formula of inhaling the section is connected with the interlude, the inside fixed mounting of interlude has stator and impeller, the inside fixed mounting of interlude has the final stage stator, the top dismantlement formula of interlude is connected with out the liquid section.

The utility model discloses technical scheme's further improvement lies in: the liquid outlet device is characterized in that a motor is fixedly mounted at the top of the liquid outlet section, an upper end cover is fixedly mounted at the top of the motor, an upper bearing is arranged in the upper end cover, a pipe plug is fixedly mounted at the right side of the upper end cover, a return pipe is fixedly connected to the top of the middle section, one end, far away from the middle section, of the return pipe extends into the upper end cover, a lifting lug is welded at the top of the upper end cover, a hole two is formed in the upper end cover, and a hole one is formed in the top of the suction section.

The utility model discloses technical scheme's further improvement lies in: the hole of impeller sets up to the toper, the dismantlement formula is connected with impeller clamping sleeve on the inner wall of impeller, the bottom dismantlement formula of impeller is connected with impeller retaining ring and impeller nut, the dismantlement formula is connected with the axle on the inner wall of impeller.

The utility model discloses technical scheme's further improvement lies in: the inner hole of the inducer is arranged to be conical, the inducer is detachably connected to the outer wall of the shaft, an inducer clamping sleeve is detachably connected to the inner wall of the inducer, an inducer check ring is detachably connected to the bottom of the inducer, and an inducer nut is detachably connected to the bottom of the inducer check ring.

Owing to adopted above-mentioned technical scheme, the utility model discloses relative prior art, the technological progress who gains is:

1. the utility model provides a high-pressure immersed pump in retractable jar, adopt the interlude, go out the liquid section, the section of inhaling, the lug, the combination of stator and impeller, connect the design of going out between the liquid section and the section of inhaling for the dismantlement formula through the interlude, can be with going out the top dismantlement of liquid section from the interlude down, then utilize external hoisting accessory to carry out the lifting through the lug to going out the liquid section, carry out suitable quantity installation to the interlude again, the realization carries out the processing of change to the quantity of stator and impeller, can make the exit pressure of this pump satisfy the different needs of high-pressure pipe network, reduce liquefied natural gas's extraction cost, promote the practicality of this pump.

2. The utility model provides a high-pressure immersed pump in retractable jar, adopt O shape sealing washer, the pipe plug, hole two, the combination of hole one and back flow, design through O shape sealing washer, can avoid the high-pressure liquid in the pump well to flow back to the problem in the storage tank, design through the pipe plug, can make a small part of high-pressure liquid pass through the pipe plug, then the peripheral of following the upper bearing flows through, realize carrying out lubricated function to it, set up hole two through setting up hole two on the upper end cover, set up hole one on the suction segment, two holes pass through the back flow intercommunication, motor upper portion space and this pump entry region intercommunication from this, its pressure is less than the pressure in the pump well, both can guarantee that lubricating liquid flows in under the pressure differential effect, also can in time discharge the gas that motor upper portion space gathers to the storage tank.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic sectional view of the impeller and the inducer of the present invention.

In the figure: 1. installing a base; 2. an O-shaped seal ring; 3. a pump well; 4. a first hole; 5. a return pipe; 6. a second hole; 7. lifting lugs; 8. large liquefied natural gas storage tanks; 9. pipe blocking; 10. an upper end cover; 11. an upper bearing; 12. a motor; 13. a liquid outlet section; 14. a last stage guide vane; 15. a last stage impeller; 16. a guide vane; 17. an impeller; 18. a middle section; 19. a flow conductor; 20. an inducer; 21. a suction section; 22. a lower bearing; 23. a lower bearing chamber; 24. a shaft; 25. an inducer nut; 26. a inducer check ring; 27. an inducer clamp sleeve; 28. an impeller clamp sleeve; 29. an impeller retainer ring; 30. and an impeller nut.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

example 1

As shown in fig. 1-2, the utility model provides a high-pressure immersed pump in retractable jar, including large-scale liquefied natural gas storage tank 8, the top fixed mounting of 8 inner chambers of large-scale liquefied natural gas storage tank has pump well 3, the bottom dismantlement formula of pump well 3 is connected with installation base 1, fixed mounting has suction segment 21 on the inner wall of installation base 1, the inside fixed mounting of suction segment 21 has inducer 20, the inside fixed mounting of suction segment 21 has baffle 19, the bottom of suction segment 21 is provided with the O shape sealing washer 2 that is located on installation base 1, this pump during operation, liquid gets into in the pump from suction segment 21, flow through inducer 20, go into impeller 17 behind baffle 19 in, and then the energy increases, after the stator 16 of installation on interlude 18 again, get into next-level impeller 17, through impeller 17, the number of interlude 18 and stator 16, can make the outlet pressure of pump satisfy the different needs of high-pressure pipe network, liquid finally gets into impeller 15, after the energy increases, after the outflow liquid flows through last stage 14 of installation liquid on the stator section 13 again, discharge liquid outlet hole to the pump on the stator section 13, the design of O shape sealing washer in the pump can avoid the high-pressure storage tank of O shape pump in the pump 2.

Example 2

As shown in fig. 1-2, on the basis of embodiment 1, the utility model provides a technical solution: preferably, a lower bearing chamber 23 is arranged at the bottom of the suction section 21, a lower bearing 22 is arranged in an inner cavity of the lower bearing chamber 23, the lower bearing 22 is immersed in warm liquid and is lubricated by the warm liquid, the top of the suction section 21 is detachably connected with a middle section 18, a guide vane 16 and an impeller 17 are fixedly arranged in the middle section 18, a final-stage impeller 15 is fixedly arranged in the middle section 18, a final-stage guide vane 14 is fixedly arranged in the middle section 18, a liquid outlet section 13 is detachably connected with the top of the middle section 18, the liquid outlet section 13 can be detached from the top of the middle section 18 through the design that the middle section 18 is detachably connected between the liquid outlet section 13 and the suction section 21, then the liquid outlet section 13 is lifted through a lifting lug 7 by using an external lifting device, and the middle section 18 is installed in proper quantity, so that the quantity of the guide vanes 16 and the impeller 17 can be changed, and the outlet pressure of the pump can meet different requirements of a high-pressure pipe network.

Example 3

As shown in fig. 1-2, on the basis of embodiment 1, the utility model provides a technical solution: preferably, a motor 12 is fixedly installed at the top of the liquid outlet section 13, an upper end cover 10 is fixedly installed at the top of the motor 12, an upper bearing 11 is arranged inside the upper end cover 10, a pipe plug 9 is fixedly installed at the right side of the upper end cover 10, a return pipe 5 is fixedly connected to the top of the middle section 18, one end, far away from the middle section 18, of the return pipe 5 extends into the upper end cover 10, a lifting lug 7 is welded at the top of the upper end cover 10, a second hole 6 is formed inside the upper end cover 10, a first hole 4 is formed at the top of the suction section 21, an inner hole of the impeller 17 is conical, an impeller clamping sleeve 28 is detachably connected to the inner wall of the impeller 17, an impeller retaining ring 29 and an impeller nut 30 are detachably connected to the bottom of the impeller 17, a shaft 24 is detachably connected to the inner wall of the impeller 17, an inner hole of the inducer 20 is conical, the inducer 20 is detachably connected to the outer wall of the shaft 24, an inducer clamping sleeve 27 is detachably connected to the inner wall of the inducer 20, an inducer retaining ring 26 is detachably connected to the bottom of the inducer 20, an inducer nut 25 is detachably connected to the bottom of the inducer retaining ring 26, and by means of the design of the pipe plug 9, a small part of high-pressure liquid can flow through the pipe plug 9 and then flow through the periphery of the upper bearing 11 to achieve the lubricating function of the upper bearing, the hole two 6 is formed in the upper end cover 10, the hole one 4 is formed in the suction section 21, and the two holes are communicated through the return pipe 5, so that the upper space of the motor 12 is communicated with the inlet area of the pump, the pressure of the upper space of the motor 12 is smaller than the pressure in the pump well 3, the lubricating liquid can be guaranteed to flow in under the action of differential pressure, and gas accumulated in the upper space of the motor 12 can be timely discharged to the storage tank.

The working principle of the retractable in-tank high-pressure submersible pump will be described in detail below.

As shown in fig. 1-2, when the pump works, liquid enters the pump from the suction section 21, flows through the inducer 20 and the guide body 19, then enters the impeller 17, then the energy is increased, then flows through the guide vane 16 arranged on the middle section 18, and enters the next-stage impeller 17, the outlet pressure of the pump can meet different requirements of a high-pressure pipe network by increasing or decreasing the number of the impeller 17, the middle section 18 and the guide vane 16, the liquid finally enters the last-stage impeller 15, and after the energy is increased, the liquid flows through the last-stage guide vane 14 arranged on the liquid outlet section 13, and then is discharged to the pump well 3 from the liquid outlet hole on the liquid outlet section 13.

The present invention has been described in detail with reference to the above general description, but it will be apparent to one of ordinary skill in the art that modifications and improvements can be made to the invention. Therefore, modifications or improvements without departing from the spirit of the invention are within the scope of the invention.

Claims

1. High-pressure immersed pump in retractable jar, including large-scale liquefied natural gas storage tank (8), its characterized in that: the top fixed mounting of large-scale liquefied natural gas storage tank (8) inner chamber has pump well (3), the bottom dismantlement formula of pump well (3) is connected with installation base (1), fixed mounting has suction section (21) on the inner wall of installation base (1), the inside fixed mounting who inhales section (21) has inducer (20), the inside fixed mounting who inhales section (21) has baffle (19), the bottom of inhaling section (21) is provided with O shape sealing washer (2) that are located on installation base (1).

2. A retractable in-tank high pressure submersible pump as claimed in claim 1, wherein: the bottom of the suction section (21) is provided with a lower bearing chamber (23), and a lower bearing (22) is arranged in an inner cavity of the lower bearing chamber (23).

3. A retractable in-tank high pressure submersible pump as claimed in claim 2, wherein: the top dismantlement formula of inhaling section (21) is connected with interlude (18), the inside fixed mounting of interlude (18) has stator (16) and impeller (17), the inside fixed mounting of interlude (18) has last stage impeller (15), the inside fixed mounting of interlude (18) has last stage stator (14), the top dismantlement formula of interlude (18) is connected with out liquid section (13).

4. A retractable in-tank high pressure submersible pump as recited in claim 3, wherein: the utility model discloses a portable liquid suction device, including play liquid section (13), the top fixed mounting of play liquid section (13) has motor (12), the top fixed mounting of motor (12) has upper end cover (10), the inside of upper end cover (10) is provided with upper bearing (11), upper end cover (10) right side fixed mounting has plug (9), the top fixedly connected with back flow (5) of interlude (18), the one end that interlude (18) were kept away from in back flow (5) extends to the inside of upper end cover (10), the top welding of upper end cover (10) has lug (7), porose two (6) are seted up to the inside of upper end cover (10), porose one (4) are seted up at the top of suction segment (21).

5. A retractable in-tank high pressure submersible pump as recited in claim 3, wherein: the hole of impeller (17) sets up to the toper, the dismantlement formula is connected with impeller clamping sleeve (28) on the inner wall of impeller (17), the bottom dismantlement formula of impeller (17) is connected with impeller retaining ring (29) and impeller nut (30), the dismantlement formula is connected with axle (24) on the inner wall of impeller (17).

6. A retractable in-tank high pressure submersible pump as claimed in claim 5, characterized by: the inner hole of the inducer (20) is arranged to be conical, the inducer (20) is detachably connected to the outer wall of the shaft (24), an inducer clamping sleeve (27) is detachably connected to the inner wall of the inducer (20), an inducer check ring (26) is detachably connected to the bottom of the inducer (20), and an inducer nut (25) is detachably connected to the bottom of the inducer check ring (26).