CN203532312U - Mechanical seal protection device for low-temperature barrel pump - Google Patents

Mechanical seal protection device for low-temperature barrel pump Download PDF

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Publication number
CN203532312U
CN203532312U CN201320726512.7U CN201320726512U CN203532312U CN 203532312 U CN203532312 U CN 203532312U CN 201320726512 U CN201320726512 U CN 201320726512U CN 203532312 U CN203532312 U CN 203532312U
Authority
CN
China
Prior art keywords
mechanical seal
lining
box
casing
balance
Prior art date
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.)
Withdrawn - After Issue
Application number
CN201320726512.7U
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Chinese (zh)
Inventor
许文超
刘磊
刘艳辉
郑全年
苏晓慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian Deep Blue Pump Co Ltd
Original Assignee
Dalian Deep Blue Pump Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dalian Deep Blue Pump Co Ltd filed Critical Dalian Deep Blue Pump Co Ltd
Priority to CN201320726512.7U priority Critical patent/CN203532312U/en
Application granted granted Critical
Publication of CN203532312U publication Critical patent/CN203532312U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A mechanical seal protection device for a low-temperature barrel pump comprises a pump shaft, an impeller, a barrel, an inlet and outlet section, a mechanical seal and a balance mechanism, wherein a liquid vaporization and temperature increment channel is added on the pump shaft between the balance mechanism and the mechanical seal, the channel adopts a buffer box body arranged above a balance box body of the balance mechanism, a shaft sleeve and a lower lining are nested in the buffer box body along the pump shaft from top to bottom, and the lower lining is fixedly connected with an upper top surface of the balance box body and cuts off an axial channel between the buffer box body and the balance box body; and a sealing box body is arranged above the buffer box body, a spacer ring and an upper lining are nested in the sealing box body along the pump shaft from top to the bottom, and the upper lining is fixedly connected with an upper top surface of the buffer box body and cuts off an axial channel between the sealing box body and the buffer box body. The mechanical seal protection device for the low-temperature barrel pump has the characteristics of simple structure, reliable and safe operation, long service life and the like, pump equipment can work continuously under the low-temperature working condition, and the work efficiency is high.

Description

Low temperature barrel bag pump mechanical seal protective gear
technical fieldthe utility model relates to a kind of low temperature liquid medium transport pump, especially a kind of low temperature barrel bag pump mechanical seal protective gear that is applicable to carry the low temperature liquid media such as-80 ℃~-120 ℃ ethene, propylene, methane, ethane.
background techniqueaccording to the physical principle of expanding with heat and contract with cold, be used at present the mechanical seal structure that transporting low temperature ethylene, methane etc. easily use in the vertical type multilevel barrel bag pump of vaporization liquid medium, exist the problem in the amplification of the working environment lower seal gap of low temperature and high pressure, mechanical seal damage parts, cause the shortening in working life of mechanical seal part, easily cause because mechanical seal part failure makes inflammable and explosive medium and leak, on pumping unit, safety in production causes very big impact and increases the problems such as operating cost.
summary of the inventionthe purpose of this utility model is to provide a kind of can realize low temperature barrel bag pump mechanical seal protective gear safe and reliable to operation.
For achieving the above object, the utility model low temperature barrel bag pump mechanical seal protective gear comprises pump shaft, impeller, cylinder bag, imports and exports section, mechanical seal, balanced controls, vaporizing liquid and intensification passage wherein on the pump shaft between balanced controls and mechanical seal, have been set up, this passage for arranging buffering casing above the balance box of balanced controls, buffering is socketed with axle sleeve and lower lining from top to bottom along pump shaft in casing, wherein descend on lining and balance box the affixed and obstruct of end face to cushion the axial passage between casing and balance box; In buffering, seal case is set above casing, in seal case, along pump shaft, is socketed with spacer ring and upper lining from top to bottom, wherein go up lining and cushion on casing the affixed and obstruction seals casing of end face and cushion the axial passage between casing.
Adopt after said structure, according to the physical property of easy gasifying liquid, after the extruding of too small gap, flow to large space because of volumetric expansion, and the double factor that applies centrifugal force makes it vaporization, and improve temperature and reduce pressure.Therefore the low temperature liquid medium being full of in balance box, enters in buffering casing and the vapour-liquid of portion's formation within it two-phase state by the radial clearance between axle sleeve and lower lining, pressure drop elevates the temperature.Medium continues to stop by radial clearance and the end face of spacer ring and upper lining, enters in the formed buffer cavity of seal case, thereby further vaporized and heat up.Thereby guaranteed that the temperature and pressure of mechanical seal place is in normal trend of work.
Feature of the present utility model is: simple in structure, safe and reliable to operation, long service life, without on-the-spot special maintenance, can realize pumping unit continuous operation under worst cold case, operation and maintenance expenses are low.
accompanying drawing explanationfig. 1 is the utility model low temperature barrel bag pump mechanical seal protective gear overall structure schematic diagram.
embodimentbelow in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1, the utility model low temperature barrel bag pump mechanical seal protective gear comprises pump shaft 16, impeller 15, cylinder bag 13, imports and exports section 12, mechanical seal 3, balanced controls 11, vaporizing liquid and intensification passage wherein on the pump shaft 16 between balanced controls 11 and mechanical seal, have been installed in addition with, this passage for being provided with buffering casing 7 above the balance box 10 of balanced controls, buffering is socketed with axle sleeve 8 and lower lining 9 from top to bottom along pump shaft in casing, wherein descend on lining and balance box the affixed and obstruct of end face to cushion the axial passage between casing and balance box; In buffering, seal case 4 is set above casing, in seal case, along pump shaft, is socketed with spacer ring 5 and upper lining 6 from top to bottom, wherein go up lining and cushion on casing the affixed and obstruction seals casing of end face and cushion the axial passage between casing.
In pumping unit running; coupling 1 provides power to pump shaft 16; bearing part 2 plays the effect of support and fixed rotor; liquid enters in cylinder bag 13 by importing and exporting the suction pipe introducing liquid of the right-hand member of section 12; after liquid being pressurizeed step by step through the impeller 15 in stage casing 14; from importing and exporting the pipeline of section left end, discharge, mechanical seal 3 is used for blocking high-pressure liquid, with balanced controls 11, reduces axial forces protection bearings.Cryogenic high pressure liquid is by flowing out and enter in balance box 10 from balanced controls 11, and the radial clearance that continues to make progress by axle sleeve 8 and lower lining 9 enters in buffering casing 7, and portion forms vapour-liquid two-phase state within it, so temperature rising pressure drop.Medium continues to stop by radial clearance and the end face of spacer ring 5 and upper lining 6, enters in the formed buffer cavity of seal case 4, is further vaporized and heats up.Guarantee that the temperature and pressure at mechanical seal 3 places, in normal working, improves the working life of mechanical seal significantly.
Feature of the present utility model is: simple in structure, reliable safety, long service life, without on-the-spot special maintenance, can realize pumping unit continuous operation under worst cold case, and operation and maintenance expenses are low.

Claims (1)

1. a low temperature barrel bag pump mechanical seal protective gear, comprise pump shaft, impeller, cylinder bag, import and export section, mechanical seal, balanced controls, it is characterized in that: on the pump shaft between balanced controls and mechanical seal, set up vaporizing liquid and intensification passage, this passage for arranging buffering casing above the balance box of balanced controls, buffering is socketed with axle sleeve and lower lining from top to bottom along pump shaft in casing, wherein descend on lining and balance box the affixed and obstruct of end face to cushion the axial passage between casing and balance box; In buffering, seal case is set above casing, in seal case, along pump shaft, is socketed with spacer ring and upper lining from top to bottom, wherein go up lining and cushion on casing the affixed and obstruction seals casing of end face and cushion the axial passage between casing.
CN201320726512.7U 2013-11-18 2013-11-18 Mechanical seal protection device for low-temperature barrel pump Withdrawn - After Issue CN203532312U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320726512.7U CN203532312U (en) 2013-11-18 2013-11-18 Mechanical seal protection device for low-temperature barrel pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320726512.7U CN203532312U (en) 2013-11-18 2013-11-18 Mechanical seal protection device for low-temperature barrel pump

Publications (1)

Publication Number Publication Date
CN203532312U true CN203532312U (en) 2014-04-09

Family

ID=50418525

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320726512.7U Withdrawn - After Issue CN203532312U (en) 2013-11-18 2013-11-18 Mechanical seal protection device for low-temperature barrel pump

Country Status (1)

Country Link
CN (1) CN203532312U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573644A (en) * 2013-11-18 2014-02-12 大连深蓝泵业有限公司 Low-temperature barrel bag pump mechanical sealing protecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573644A (en) * 2013-11-18 2014-02-12 大连深蓝泵业有限公司 Low-temperature barrel bag pump mechanical sealing protecting device
CN103573644B (en) * 2013-11-18 2015-12-30 大连深蓝泵业有限公司 Low-temperature barrel bag pump mechanical seal protective gear

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20140409

Effective date of abandoning: 20151230

C25 Abandonment of patent right or utility model to avoid double patenting