CN103557395B - Can increase respiratory capacity from pressure-relief type metallic bellow expander - Google Patents
Can increase respiratory capacity from pressure-relief type metallic bellow expander Download PDFInfo
- Publication number
- CN103557395B CN103557395B CN201310526775.8A CN201310526775A CN103557395B CN 103557395 B CN103557395 B CN 103557395B CN 201310526775 A CN201310526775 A CN 201310526775A CN 103557395 B CN103557395 B CN 103557395B
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- China
- Prior art keywords
- metal bellows
- righting block
- connecting tube
- welded
- central siphon
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/03—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube comprising two or more bellows
Abstract
The invention discloses a kind of increase respiratory capacity from pressure-relief type metallic bellow expander, solve the problem that the maximal breathing capacity of existing metallic bellow expander is little; Its technological scheme mainly adds these parts of connecting tube on the basis of original expander, adopt connecting tube that first and second metal bellows can be made to have lap, the existence of this lap, the first metal bellows and the second wavy metal length of tube under comparable size prerequisite is made more not to adopt overlay structure effectively to increase, namely add the maximum deformation quantity of Tension and Compression, namely add maximal breathing capacity.In addition, have also been devised from decompression mechanism, when the expansion of metal bellows or contraction reach maximum allowable transformation amount, decompression mechanism is opened, and ensures that metal bellows does not produce permanent deformation, increases the safety and reliability of submersible electric motor protector.
Description
Technical field
The present invention relates to a kind of metallic bellow expander in oil extraction in oil field lifting equipment submersible electric pump technical field.
Background technique
The expander be applied in submersible electric motor protector has two kinds at present: rubber swelling device and metallic bellow expander, rubber swelling device adopts when well temperature is lower, and metallic bellow expander adopts when well temperature is higher.
The respiratory function of metallic bellow expander is realized by the distortion of the connected metal bellows of small one and large one two sections of diameter.When the larger metal bellows of diameter and large bellows extend, and when the less metal bellows of diameter and small corrugated pipe shorten, metallic bellow expander cavity volume increases, and time contrary, metallic bellow expander cavity volume reduces.The difference of metallic bellow expander inner chamber maximum volume and minimum volume is the maximal breathing capacity of this metallic bellow expander.
As requested, metal bellows extends or must not shrink and exceedes 50% of raw footage, otherwise will produce permanent deformation.In order to ensure that large small corrugated pipe can reach maximum deformation quantity, the length of large small corrugated pipe should be 50% of metallic bellow expander total length, and namely large small corrugated pipe maximum compression or swell increment are 25% of metallic bellow expander total length.So the above-mentioned characteristic of metal bellows determines the maximal breathing capacity of metallic bellow expander, if it is impossible for going for higher maximal breathing capacity.
Summary of the invention
The object of this invention is to provide a kind of novel metallic bellow expander, under comparable size condition, this metallic bellow expander has higher maximal breathing capacity, and can ensure that metal bellows does not produce permanent deformation.
For achieving the above object, the technical solution used in the present invention is: can increase respiratory capacity from pressure-relief type metallic bellow expander, comprise upper connection, three metal bellowss, protect central siphon, upper righting block, connecting tube, lower righting block, sealing drum, seal ring and lower contact; Fixed center axis between upper connection and lower contact, central shaft overcoat protects central siphon, protect central siphon overcoat and have upper righting block, protect between central siphon and upper righting block and be slidably matched, upper righting block outside weld is connected to connecting tube, and the lower end mouth of connecting tube arranges horizontal outer, and the first metal bellows is enclosed within outside connecting tube, its upper edge is welded on the lower end surface of upper connection, and its lower edge is welded on the horizontal outer of connecting tube; Protect central siphon outward also cover have lower righting block, lower righting block and protecting between central siphon is slidably matched, and the upper edge of the second metal bellows is welded on righting block, and its lower edge is welded on lower righting block, the upper edge of the 3rd metal bellows is welded on lower righting block, and its lower edge is welded in lower contact; Lower righting block outside thread is connected with sealing drum, the sidewall of sealing drum has relief hole, the sidewall of lower contact has oil leak hole, top and the below of lower contact oil leak hole arrange seal ring respectively, and the lower end mouth of sealing drum is enclosed within outside lower contact, is slidably matched between sealing drum and lower contact, when first metal bellows is in limit of expansion, relief hole communicates with oil leak hole, and when the second metal bellows is in limit of expansion, the lower edge of sealing drum is positioned at the top of lower sealing ring.
Beneficial effect of the present invention:
1, the safety and reliability of submersible electric motor protector is increased:
Because this expander carries pressure relief, and the unlatching of pressure relief is by the deformation amount controlling of metal bellows, when the expansion of metal bellows or contraction reach maximum allowable transformation amount, pressure relief is opened, stop metal bellows amount of deformation to continue to increase, ensure that metal bellows does not produce permanent deformation;
2, under comparable size, metallic bellow expander is made to have larger respiratory capacity:
This metallic bellow expander have employed the project organization that size metal bellows has lap.Because there is lap, so the first metal bellows and the second wavy metal length of tube more do not adopt overlay structure effectively to increase, namely add the maximum deformation quantity of Tension and Compression, namely add maximal breathing capacity.As calculated under same size, the maximal breathing capacity adopting overlay structure more not adopt the metallic bellow expander maximal breathing capacity of overlay structure can increase original 1.75 liters of about 26%(can reach 2.2 liters).
Accompanying drawing explanation
Fig. 1 is the structural representation under pressure-relief type metallic bellow expander free state that the present invention can increase respiratory capacity.
Fig. 2 is the structural representation under pressure-relief type metallic bellow expander is in limited compression state that the present invention can increase respiratory capacity.
Fig. 3 is the structural representation under pressure-relief type metallic bellow expander is in limit swelling state that the present invention can increase respiratory capacity.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated:
As shown in Figure 1: can increase respiratory capacity from pressure-relief type metallic bellow expander, comprise upper connection 1, three metal bellowss, protect central siphon 3, upper righting block 4, connecting tube 5, lower righting block 7, sealing drum 9, seal ring 11 and lower contact 13, fixed center axis between upper connection 1 and lower contact 13, central shaft overcoat protects central siphon 3, protect central siphon 3 overcoat and have upper righting block 4, protect between central siphon 3 and upper righting block 4 and be slidably matched, the outside weld of upper righting block 4 is connected to connecting tube 5, and the lower end mouth of connecting tube 5 arranges horizontal outer, and the first metal bellows 2 is enclosed within outside connecting tube 5, its upper edge is welded on the lower end surface of upper connection 1, and its lower edge is welded on the horizontal outer of connecting tube 5, protect the outer also cover of central siphon 3 and have lower righting block 7, lower righting block 7 and protecting between central siphon 3 is slidably matched, the upper edge of the second metal bellows 6 is welded on righting block 4, its lower edge is welded on lower righting block 7, the upper edge of the 3rd metal bellows 8 is welded on lower righting block 7, its lower edge is welded in lower contact 13, and the diameter of the first metal bellows 2 is greater than the diameter of the second metal bellows 6 and the 3rd metal bellows 8, lower righting block 7 outside thread is connected with sealing drum 9, the sidewall of sealing drum 9 has relief hole 10, the sidewall of lower contact 13 has oil leak hole 12, top and the below of the oil leak hole 12 of lower contact arrange seal ring 11 respectively, the lower end mouth of sealing drum 9 is enclosed within outside lower contact 13, be slidably matched between sealing drum 9 and lower contact 13, as shown in Figure 2: when the second metal bellows 6 is in limit of expansion, the lower edge of sealing drum 9 is positioned at the top of lower sealing ring, as shown in Figure 3: when the first metal bellows 2 is in limit of expansion, relief hole is positioned at the below of upper sealing ring, relief hole 10 is communicated with oil leak hole 12.
During use, as shown in Figure 3: when expander of the present invention because interior pressure increases from free state to inner chamber maximum swelling state-transition and after reaching inner chamber maximum swelling state, the seal ring seal effect of top was lost efficacy, start pressure release from relief hole, thus effectively ensure that large bellows amount of deformation is in controlled range; As shown in Figure 2: when expander of the present invention because external pressure increases from free state to inner chamber maximum collapse state-transition and after reaching inner chamber maximum collapse state, the seal ring seal effect of below was lost efficacy, start pressure release from oil leak hole, thus effectively ensure that small corrugated pipe amount of deformation is in controlled range.
Design principle of the present invention:
1, assign to increase the maximal breathing capacity of metallic bellow expander by increasing the overlapping portion of large small corrugated pipe
Because the elongation of metal bellows or the amount of deformation of contraction must not exceed full-sized 50%, so the length suitably increasing metal bellows can increase respiratory capacity, in order to not increase the total length of metallic bellow expander, can be partly overlapped large bellows and small corrugated pipe the length of placing and increasing large bellows and small corrugated pipe, thus increase its maximum deformation quantity, namely increase maximal breathing capacity;
2, by increasing the Security strengthening metallic bellow expander from pressure relief
Under normal state, in metallic bellow expander, exocoel is mutually isolated.When this expander inner chamber expands, second metal bellows as shown in Figure 3 and the 3rd metal bellows are compressed, thus make connecting tube promote sealing drum to produce downward movement along with the compression of metal bellows, when the relief hole of sealing drum side is moved down into the position lower than upper sealing ring, the seal action of upper sealing ring will lose efficacy, now because chamber pressure is higher, dynamo oil can flow out the object reaching pressure release from lower contact oil leak hole, effectively ensures that the amount of deformation of the first metal bellows is in controlled range.Pressure release rear interior cavity pressure drop, drive on sealing drum and move, again work higher than sealing effect during upper sealing ring when the relief hole of sealing drum moves to, interior exocoel is isolated again, said process is namely from pressure leak process, because chamber pressure is all the time higher than outer cavity pressure in this process, so can only be that dynamo oil in inner chamber flows to exocoel when seal ring lost efficacy, and the well liquid of exocoel is (if there is well liquid to exist, under normal state, exocoel is all dynamo oil) can not inner chamber be flowed into, thus ensure in the effect that can not affect expander barrier wells liquid in pressure leak process.
Claims (1)
1. can increase respiratory capacity from pressure-relief type metallic bellow expander, comprise upper connection, three metal bellowss, protect central siphon, upper righting block, connecting tube, lower righting block, sealing drum, seal ring and lower contact; Fixed center axis between described upper connection and lower contact, central shaft overcoat protects central siphon, protect central siphon overcoat and have upper righting block, protect between central siphon and upper righting block and be slidably matched, it is characterized in that: described upper righting block outside weld is connected to connecting tube, and the lower end mouth of connecting tube arranges horizontal outer, and the first metal bellows is enclosed within outside connecting tube, its upper edge is welded on the lower end surface of upper connection, and its lower edge is welded on the horizontal outer of connecting tube; Protect central siphon outward also cover have lower righting block, lower righting block and protecting between central siphon is slidably matched, and the upper edge of the second metal bellows is welded on righting block, and its lower edge is welded on lower righting block, the upper edge of the 3rd metal bellows is welded on lower righting block, and its lower edge is welded in lower contact; Lower righting block outside thread is connected with sealing drum, the sidewall of sealing drum has relief hole, the sidewall of lower contact has oil leak hole, in lower contact, the top of oil leak hole and below arrange seal ring respectively, and the lower end mouth of sealing drum is enclosed within outside lower contact, is slidably matched between sealing drum and lower contact, when first metal bellows is in limit of expansion, relief hole communicates with oil leak hole, and when the second metal bellows is in limit of expansion, the lower edge of sealing drum is positioned at the top of lower sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310526775.8A CN103557395B (en) | 2013-10-30 | 2013-10-30 | Can increase respiratory capacity from pressure-relief type metallic bellow expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310526775.8A CN103557395B (en) | 2013-10-30 | 2013-10-30 | Can increase respiratory capacity from pressure-relief type metallic bellow expander |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103557395A CN103557395A (en) | 2014-02-05 |
| CN103557395B true CN103557395B (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310526775.8A Active CN103557395B (en) | 2013-10-30 | 2013-10-30 | Can increase respiratory capacity from pressure-relief type metallic bellow expander |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104929917B (en) * | 2015-05-18 | 2016-08-31 | 薛国清 | A kind of sealing system of oil immersion line motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2191956Y (en) * | 1993-10-21 | 1995-03-15 | 王延军 | Pressure balance type bellows expansion joint |
| DE102007038509A1 (en) * | 2006-08-18 | 2008-02-28 | Witzenmann Gmbh | Flexible pipe element for the exhaust gas system of a motor vehicle comprises a knitted tube with a radially thicker peripheral region produced by carding, folding or rolling for fixing on a metal corrugated sheathing hose |
| CN201717699U (en) * | 2010-05-27 | 2011-01-19 | 大庆石油管理局 | Metal corrugated tube oil storage cavity for submersible motor protector |
| DE102009049475A1 (en) * | 2009-10-15 | 2011-04-21 | Schöler, Marcus | Compensator for use in automotive areas for installation in exhaust gas system of vehicle, has body provided with tube with ends and flexible tubing section produced by laser cut, where tubing section includes ring elements |
| CN103075604A (en) * | 2011-10-25 | 2013-05-01 | 江苏卉欣波纹管业有限公司 | Pressure balance type bellows compensator |
| CN103307402A (en) * | 2013-06-27 | 2013-09-18 | 江苏博格东进管道设备有限公司 | Straight pipe outer pressure balance type ripple compensator |
-
2013
- 2013-10-30 CN CN201310526775.8A patent/CN103557395B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2191956Y (en) * | 1993-10-21 | 1995-03-15 | 王延军 | Pressure balance type bellows expansion joint |
| DE102007038509A1 (en) * | 2006-08-18 | 2008-02-28 | Witzenmann Gmbh | Flexible pipe element for the exhaust gas system of a motor vehicle comprises a knitted tube with a radially thicker peripheral region produced by carding, folding or rolling for fixing on a metal corrugated sheathing hose |
| DE102009049475A1 (en) * | 2009-10-15 | 2011-04-21 | Schöler, Marcus | Compensator for use in automotive areas for installation in exhaust gas system of vehicle, has body provided with tube with ends and flexible tubing section produced by laser cut, where tubing section includes ring elements |
| CN201717699U (en) * | 2010-05-27 | 2011-01-19 | 大庆石油管理局 | Metal corrugated tube oil storage cavity for submersible motor protector |
| CN103075604A (en) * | 2011-10-25 | 2013-05-01 | 江苏卉欣波纹管业有限公司 | Pressure balance type bellows compensator |
| CN103307402A (en) * | 2013-06-27 | 2013-09-18 | 江苏博格东进管道设备有限公司 | Straight pipe outer pressure balance type ripple compensator |
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| CN103557395A (en) | 2014-02-05 |
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