CN103557395A - Self-pressure relief type metal corrugated pipe expander capable of increasing respiratory capacity - Google Patents
Self-pressure relief type metal corrugated pipe expander capable of increasing respiratory capacity Download PDFInfo
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- CN103557395A CN103557395A CN201310526775.8A CN201310526775A CN103557395A CN 103557395 A CN103557395 A CN 103557395A CN 201310526775 A CN201310526775 A CN 201310526775A CN 103557395 A CN103557395 A CN 103557395A
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- metal corrugated
- corrugated pipe
- righting block
- metal bellows
- welded
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention discloses a self-pressure relief type metal corrugated pipe expander capable of increasing respiratory capacity, aiming at solving the problem that the existing metal corrugated pipe expander is small in maximum respiratory capacity. The self-pressure relief type metal corrugated pipe expander has the technical scheme that a connecting pipe is added based on the original expander; after the connecting pipe is adopted, a first metal corrugated pipe and a second metal corrugated pipe have an overlapped part; due to the existence of the overlapped part, the lengths of the first metal corrugated pipe and the second metal corrugated pipe can be effectively lengthened compared with the first metal corrugated pipe and the second metal corrugated pipe which do not have the overlapped structure on the premise of the same size, the maximum deformation of stretching and compressing can be increased, and the maximum respiratory capacity is increased. Furthermore, a self-pressure relief mechanism is designed; when the expansion or the contraction of the metal corrugated pipes reaches the maximum allowable deformation, the self-pressure relief mechanism is started, so that the metal corrugated pipes are enabled not to have permanent deformation, and the safety and the reliability of a submersible motor protector are improved.
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 being applied in submersible electric motor protector at present has two kinds: rubber swelling device and metallic bellow expander, and rubber swelling device adopts in the situation that well temperature is lower, and metallic bellow expander adopts in the situation that well temperature is higher.
The respiratory function of metallic bellow expander is realized by small one and large one the distortion of two sections of connected metal bellowss of diameter.When the larger metal bellows of diameter is that large bellows extends, and the less metal bellows of diameter is when to be small corrugated pipe shorten, and metallic bellow expander cavity volume increases, and when contrary, metallic bellow expander cavity volume is dwindled.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 surpasses 50% of raw footage, otherwise will produce permanent deformation.In order to guarantee 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 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 has determined the maximal breathing capacity of metallic bellow expander, if go for higher maximal breathing capacity, be impossible.
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 guarantee 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, the Shang，Qi lower edge, lower end surface that its upper edge is welded in upper connection is welded on the horizontal outer of connecting tube; Protecting central siphon also overlaps and has lower righting block outward, 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 draining hole, top and the below in lower contact draining hole arrange respectively seal ring, and the lower end mouth of sealing drum is enclosed within outside lower contact, between sealing drum and lower contact, is slidably matched, the first metal bellows is when limit of expansion, relief hole communicates with draining hole, and the second metal bellows is when limit of expansion, and the lower edge of sealing drum is positioned at the top of lower sealing ring.
Beneficial effect of the present invention:
1, increase the safety and reliability of submersible electric motor protector:
Because this expander carries pressure relief, and the unlatching of pressure relief is controlled by the amount of deformation of metal bellows, when the expansion of metal bellows or contraction reach maximum while allowing amount of deformation pressure relief open, stop metal bellows amount of deformation to continue to increase, guarantee that metal bellows does not produce permanent deformation;
2, under comparable size, make metallic bellow expander have larger respiratory capacity:
This metallic bellow expander has adopted big or small metal bellows to have the project organization of 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 increased the maximum deformation quantity that stretches and compress, increased maximal breathing capacity.Under same size, the maximal breathing capacity that adopts 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 as calculated).
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 limit compressive state from pressure-relief type metallic bellow expander that the present invention can increase respiratory capacity.
Fig. 3 is the structural representation under limit swelling state from pressure-relief type metallic bellow expander 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 overcoats and have upper righting block 4, protecting 4 of central siphon 3 and upper righting blocks is slidably matched, upper righting block 4 outside welds are 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, the Shang，Qi lower edge, lower end surface that its upper edge is welded in upper connection 1 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 protect 3 of central siphons and be 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 threads are connected with sealing drum 9, the sidewall of sealing drum 9 has relief hole 10, the sidewall of lower contact 13 has draining hole 12, top and the below in the draining hole 12 of lower contact arrange respectively seal ring 11, the lower end mouth of sealing drum 9 is enclosed within outside lower contact 13, 13 of sealing drum 9 and lower contacts are slidably matched, as shown in Figure 2: when the second metal bellows 6 is during 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 during in limit of expansion, relief hole is positioned at the below of upper sealing ring, relief hole 10 is communicated with draining hole 12.
During use, as shown in Figure 3: when expander of the present invention is because interior pressure increases from free state to inner chamber maximum swelling state-transition and reaches inner chamber maximum swelling state, the seal ring seal effect of top was lost efficacy, from relief hole, start pressure release, thereby effectively guarantee that large bellows amount of deformation is in controlled range; As shown in Figure 2: when expander of the present invention is because external pressure increases from free state to inner chamber maximum collapse state-transition and reaches inner chamber maximum collapse state, the seal ring seal effect of below was lost efficacy, from draining hole, start pressure release, thereby effectively guarantee that small corrugated pipe amount of deformation is in controlled range.
Design principle of the present invention:
1, by increasing the overlapping portion of large small corrugated pipe, assign to increase the maximal breathing capacity of metallic bellow expander
Because the elongation of metal bellows or the amount of deformation of contraction must not surpass full-sized 50%, so suitably increase the length of metal bellows, can increase respiratory capacity, in order not increase the total length of metallic bellow expander, large bellows and small corrugated pipe can be partly overlapped and place the length that increases large bellows and small corrugated pipe, thereby increase its maximum deformation quantity, increase maximal breathing capacity;
2, by increasing the Security that strengthens metallic bellow expander from pressure relief
Under normal state, in metallic bellow expander, exocoel is isolated mutually.When this expander inner chamber expands, the second metal bellows and the 3rd metal bellows are compressed as shown in Figure 3, thereby make connecting tube promotion sealing drum along with the compression of metal bellows produces downward movement, 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 that reaches pressure release from lower contact draining hole, effectively guarantees 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, when the relief hole of sealing drum moves to higher than upper sealing ring, sealing effect works again, interior exocoel is isolated again, said process is from pressure leak process, in this process because chamber pressure is all the time higher than outer cavity pressure, 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 flow into inner chamber, thus guarantee in pressure leak process, to affect the effect of expander barrier wells liquid.
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, the Shang，Qi lower edge, lower end surface that its upper edge is welded in upper connection is welded on the horizontal outer of connecting tube; Protecting central siphon also overlaps and has lower righting block outward, 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 draining hole, in lower contact, the top in draining hole and below arrange respectively seal ring, and the lower end mouth of sealing drum is enclosed within outside lower contact, between sealing drum and lower contact, are slidably matched, the first metal bellows is when limit of expansion, relief hole communicates with draining hole, and the second metal bellows is when limit of expansion, and 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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN103557395A true CN103557395A (en) | 2014-02-05 |
| CN103557395B CN103557395B (en) | 2016-03-02 |
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929917A (en) * | 2015-05-18 | 2015-09-23 | 薛国清 | Sealing system of submersible linear 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929917A (en) * | 2015-05-18 | 2015-09-23 | 薛国清 | Sealing system of submersible linear motor |
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| CN103557395B (en) | 2016-03-02 |
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