CN204729385U - The differential voltage regulation cylinder of mechanical seal - Google Patents
The differential voltage regulation cylinder of mechanical seal Download PDFInfo
- Publication number
- CN204729385U CN204729385U CN201520396195.6U CN201520396195U CN204729385U CN 204729385 U CN204729385 U CN 204729385U CN 201520396195 U CN201520396195 U CN 201520396195U CN 204729385 U CN204729385 U CN 204729385U
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- CN
- China
- Prior art keywords
- end cap
- cylinder barrel
- piston
- tubular shell
- spacing
- 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- Withdrawn - After Issue
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Abstract
The utility model discloses the differential voltage regulation cylinder of a kind of mechanical seal.It comprises first, second end cap at tubular shell and two ends thereof, has cylinder barrel in tubular shell, has the first spacing and heat exchange coil pipe between cylinder barrel and tubular shell.Linking together in sealing shape between cylinder barrel lower end and the second rubbing surface of end cover, between cylinder barrel upper end and the first end cap downside, leaving the second spacing.First end cap central has rod aperture, has transparent glass tube outside the first end cap, and transparent glass tube one end surrounding is connected to the surrounding of rod aperture.Have piston rod in rod aperture, piston rod inner end to be stretched in cylinder barrel and is connected with piston, forms sealing liquid chamber and media cavity respectively by piston both sides.Piston rod outer end is stretched in transparent glass tube through after the first end cap.The cylindrical of the first end cap there is sealing fluid import, the second end cap has medium entrance and seal fluid outlet.Adopt the utility model, can working life of prolonged mechanical sealing system.Can be pump and Mechanical Seal Auxiliary System provides sealing fluid, to avoid in pump medium to reveal.
Description
Technical field
The utility model relates to a kind of oil hydraulic cylinder.Specifically, be used to as pump and Mechanical Seal Auxiliary System provide sealing fluid, avoid the differential voltage regulation cylinder that in pump, medium is revealed.
Background technique
At present at petrochemical field, be all adopt pipeline and pump to carry various fluid chemical raw material.Industrial chemicals mostly wherein is again inflammable and explosive, poisonous and harmful material.Therefore, when carrying inflammable and explosive, poisonous and harmful material, leakage that is inflammable and explosive, poisonous and harmful material must just be prevented.Conventional method arranges Mechanical Seal Auxiliary System in the wheel shaft one end near pump, sealing fluid is provided by Mechanical Seal Auxiliary System, make sealing fluid circulation between two-stage sealing, and make the pressure of sealing fluid higher than the pressure being transferred chemical material, thus play the effect intercepting and be transferred chemical material.But in actual production, if be transferred in pump chemical material pressure higher and fluctuation larger, sealed fluid pressure setting value in Seal cage outside pump just must higher than the pressure surge peak being transferred chemical material, sealing outside pump is run for a long time under high pressure operating mode, like this, the working life of mechanical sealing system can be shortened, make the working life of mechanical sealing system not long.
Model utility content
Problem to be solved in the utility model is to provide the differential voltage regulation cylinder of a kind of mechanical seal.Adopt the differential voltage regulation cylinder of this mechanical seal, can working life of prolonged mechanical sealing system.
The problems referred to above to be solved in the utility model are realized by following technological scheme:
The differential voltage regulation cylinder of mechanical seal of the present utility model comprises tubular shell, tubular shell two ends are connected with the first end cap and the second end cap respectively, cylinder barrel is had in tubular shell, the external diameter of cylinder barrel is less than tubular shell internal diameter, make between cylinder barrel and tubular shell, to form the first spacing, have heat exchange coil pipe in first spacing, the two ends of heat exchange coil pipe all extend through after the second end cap.Linking together in sealing shape between described cylinder barrel lower end and the second rubbing surface of end cover, between cylinder barrel upper end and the first end cap downside, leaving the second spacing.First end cap central has rod aperture, has transparent glass tube outside the first end cap, and one end surrounding of transparent glass tube is connected to the surrounding of described rod aperture.Be installed with piston rod in rod aperture, piston rod inner end to be stretched in cylinder barrel and is connected with piston, forms sealing liquid chamber, form media cavity by that section of inner cavity of cylinder between piston and the second end cap by that section of inner cavity of cylinder between piston and the first end cap.Described piston rod outer end is stretched in transparent glass tube through after the first end cap.The cylindrical of the first end cap has sealing fluid import, the import of sealing liquid all communicates with sealing liquid chamber and the first spacing.Second end cap has medium entrance 91 and seal fluid outlet, described medium entrance and seal fluid outlet are corresponding with the first spacing with media cavity respectively and be communicated with.
Further improvement of the utility model scheme is, the overhanging end of piston rod has liquid level mark block.
Further improvement project of the present utility model is, first end has covered pressure gauge, thermometer or pressure transmitter mount inlet.
As can be seen from the above scheme, because the differential voltage regulation cylinder of mechanical seal of the present utility model comprises tubular shell, tubular shell two ends are connected with the first end cap and the second end cap respectively, cylinder barrel is had in tubular shell, the external diameter of cylinder barrel is less than tubular shell internal diameter, make to form the first spacing between cylinder barrel and tubular shell, have heat exchange coil pipe in the first spacing, the two ends of heat exchange coil pipe all extend through after the second end cap.Linking together in sealing shape between described cylinder barrel lower end and the second rubbing surface of end cover, between cylinder barrel upper end and the first end cap downside, leaving the second spacing; First end cap central has rod aperture, and the first end cap outer side surface has transparent glass tube, and one end surrounding of transparent glass tube is connected to the surrounding of described rod aperture.Be installed with piston rod in rod aperture, piston rod inner end to be stretched in cylinder barrel and is connected with piston, forms sealing liquid chamber, form media cavity by that section of inner cavity of cylinder between piston and the second end cap by that section of inner cavity of cylinder between piston and the first end cap.Described piston rod outer end is stretched in transparent glass tube through after the first end cap.The cylindrical of the first end cap has sealing fluid import, the import of sealing liquid all communicates with sealing liquid chamber and the first spacing.Second end cap has medium entrance and seal fluid outlet, described medium entrance and seal fluid outlet are corresponding with the first spacing with media cavity respectively and be communicated with.Under working state, the sealing fluid import that sealing fluid is covered by first end enters in Seal cage, produces a downward active force to piston.Medium enters media cavity from the medium entrance of this second end cap, produces an active force upwards to piston.Because the upper surface of piston is connected with one end of piston rod, piston rod upper surface area is made to be less than the area of its lower surface, as can be seen from pressure formula P=F/S, the pressure that piston upper surface is subject to must be greater than the pressure that its lower surface is subject to, namely sealing liquid chamber is greater than media cavity pressure, pressure ratio is the inverse ratio of piston surface area, is a fixed value.When the pressure medium in pump fluctuates, pressure in media cavity is also along with fluctuation, pressure in sealing liquid chamber is also greater than the pressure in media cavity all the time by certain supercharging amplitude fluctuation by piston, not only prevent the dielectric leakage in pump, also achieve the automatic adjustment of working pressure.The situation that the sealing normal phase outside pump that avoids is run under high pressure operating mode, thus extend the working life of mechanical sealing system.
Accompanying drawing explanation
Fig. 1 is the differential voltage regulation cylinder structural representation of mechanical seal of the present utility model.
Embodiment
As shown in Figure 1, the differential voltage regulation cylinder of mechanical seal of the present utility model comprises tubular shell 4, tubular shell 4 two ends are connected with the first end cap 11 and the second end cap 1 respectively, cylinder barrel 5 is had in tubular shell 4, the external diameter of cylinder barrel 5 is less than tubular shell 4 internal diameter, make to form the first spacing 6 between cylinder barrel 5 and tubular shell 4, be provided with heat exchange coil pipe 3 in described first spacing 6, the two ends of heat exchange coil pipe 3 all extend through after the second end cap 1.Linking together in sealing shape by seal ring 2 between described cylinder barrel 5 lower end and the second end cap 1 inner side surface, between cylinder barrel 5 upper end and the first end cap 11 downside, leaving the second spacing 13.First end cap 11 center is processed with rod aperture, and the first end cap 11 arranged outside has transparent glass tube 9, and one end surrounding of transparent glass tube 9 is connected to the surrounding of described rod aperture.Be installed with piston rod 8 in described rod aperture, piston rod 8 inner end to be stretched in cylinder barrel 5 and is connected with piston 15, forms sealing liquid chamber 14, form media cavity 16 by that section of cylinder barrel 5 inner chamber between piston 15 and the second end cap 1 by that section of cylinder barrel 5 inner chamber between piston 15 and the first end cap 11.Described piston rod 8 outer end is stretched in transparent glass tube 9 through after the first end cap 1.Wherein, the overhanging end of piston rod 8 is connected with liquid level mark block 10.The cylindrical of the first end cap 11 is processed with sealing fluid import 7, and the import of sealing liquid all communicates with sealing liquid chamber 14 and the first spacing 6.Second end cap 1 is processed with medium entrance 18 and seal fluid outlet 17, described medium entrance 18 and seal fluid outlet 17 are corresponding with the first spacing 6 with media cavity 16 respectively and be communicated with.
The mount inlet 12 for setting pressure table, thermometer or pressure transmitter is processed with in the both sides of the first end cap 11.
During work, sealing fluid enters in sealing liquid chamber 14 and produces a downward active force to piston 15, and medium enters media cavity 16 pairs of pistons 15 and produces an active force upwards.When piston 15 balances, suffered by its upper and lower surface, active force is equal.And the area of piston 15 upper surface is less than the area of its lower surface, according to pressure formula P=F/S, the pressure that piston 15 upper surface is subject to must be greater than the pressure that its lower surface is subject to, that is, the pressure in sealing liquid chamber 14 is greater than the pressure of media cavity 16, and the pressure ratio of the two is the inverse ratio of the two surface area, is a fixed value.When the pressure medium in pump fluctuates, the pressure of media cavity 16 is also with fluctuating thereupon, the pressure in sealing liquid chamber 14 is also also greater than the pressure of media cavity 16 all the time by certain supercharging amplitude fluctuation by piston 15, thus while prevention dielectric leakage, also achieve the automatic adjustment of working pressure.
Claims (3)
1. the differential voltage regulation cylinder of mechanical seal, comprise tubular shell (4), tubular shell (4) two ends are connected with the first end cap (11) and the second end cap (1) respectively, cylinder barrel (5) is had in tubular shell (4), the external diameter of cylinder barrel (5) is less than tubular shell (4) internal diameter, make to form the first spacing (6) between cylinder barrel (5) and tubular shell (4), have heat exchange coil pipe (3) in the first spacing (6), the two ends of heat exchange coil pipe (3) all extend through after the second end cap (1); Linking together in sealing shape between described cylinder barrel (5) lower end and the second end cap (1) inner side surface, between cylinder barrel (5) upper end and the first end cap (11) downside, leaving the second spacing (13); There is rod aperture at first end cap (11) center, and there is transparent glass tube (9) in the first end cap (11) outside, and one end surrounding of transparent glass tube (9) is connected to the surrounding of described rod aperture; Piston rod (8) is installed with in rod aperture, piston rod (8) inner end to be stretched in cylinder barrel (5) and is connected with piston (15), form sealing liquid chamber (14) by that section of cylinder barrel (5) inner chamber between piston (15) and the first end cap (11), form media cavity (16) by that section of cylinder barrel (5) inner chamber between piston (15) and the second end cap (1); Described piston rod (8) outer end is stretched in transparent glass tube (9) through after the first end cap (11); The cylindrical of the first end cap (11) has sealing fluid import (7), the import of sealing liquid all communicates with sealing liquid chamber (14) and the first spacing (6); Second end cap (1) has medium entrance (18) and seal fluid outlet (17), described medium entrance (18) and seal fluid outlet (17) are corresponding with the first spacing (6) with media cavity (16) respectively and be communicated with.
2. the differential voltage regulation cylinder of mechanical seal according to claim 1, the overhanging end that it is characterized in that piston rod (8) has liquid level mark block (10).
3. the differential voltage regulation cylinder of mechanical seal according to claim 1 and 2, is characterized in that the first end cap (11) having pressure gauge, thermometer or pressure transmitter mount inlet (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520396195.6U CN204729385U (en) | 2015-06-10 | 2015-06-10 | The differential voltage regulation cylinder of mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520396195.6U CN204729385U (en) | 2015-06-10 | 2015-06-10 | The differential voltage regulation cylinder of mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729385U true CN204729385U (en) | 2015-10-28 |
Family
ID=54387742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520396195.6U Withdrawn - After Issue CN204729385U (en) | 2015-06-10 | 2015-06-10 | The differential voltage regulation cylinder of mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204729385U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963910A (en) * | 2015-06-10 | 2015-10-07 | 无锡博伊特科技股份有限公司 | Differential pressure adjusting cylinder for mechanical seal |
| CN114754006A (en) * | 2022-05-13 | 2022-07-15 | 吴琳琳 | Wear-resistant and corrosion-resistant horizontal centrifugal pump |
-
2015
- 2015-06-10 CN CN201520396195.6U patent/CN204729385U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963910A (en) * | 2015-06-10 | 2015-10-07 | 无锡博伊特科技股份有限公司 | Differential pressure adjusting cylinder for mechanical seal |
| CN104963910B (en) * | 2015-06-10 | 2017-03-15 | 无锡博伊特科技股份有限公司 | The differential voltage regulation cylinder of mechanical seal |
| CN114754006A (en) * | 2022-05-13 | 2022-07-15 | 吴琳琳 | Wear-resistant and corrosion-resistant horizontal centrifugal pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151028 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |