CN101141083A - Submersible electric pump cable introduced seal device - Google Patents
Submersible electric pump cable introduced seal device Download PDFInfo
- Publication number
- CN101141083A CN101141083A CNA2006100321934A CN200610032193A CN101141083A CN 101141083 A CN101141083 A CN 101141083A CN A2006100321934 A CNA2006100321934 A CN A2006100321934A CN 200610032193 A CN200610032193 A CN 200610032193A CN 101141083 A CN101141083 A CN 101141083A
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- China
- Prior art keywords
- down bolt
- cable
- piston ring
- expansion ring
- compression spring
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Abstract
The invention relates to a submersible pump cable introducing sealing device, comprising an outlet box cover1, an expansion ring 2, a copper pelleting 3, a holding down bolt 4, a compression spring 6 and a spring seat 7 which are arranged at the casing of the electric machine; wherein the outlet box cover1 is provided with an outlet hole 1, the expansion ring 2, the copper pelleting 3, the compression spring 6 and the spring seat 7 which are orderly coated with a cable wire 5, and then pressed in the outlet hole of the outlet box cover1 by the holding down bolt 4; the holding down bolt 4 closely presses the expansion ring 2 through the spring seat 7, the compression spring 6 and the copper pelleting 3, and then the expansion ring 2 is jostled against the cable wire 5 to realize the seal. Due to the compression spring 6 is arranged between the holding down bolt 4 and the expansion ring 2, compared with the prior art, the invention is capable of effectively solving the problem of weak sealing of the outlet box caused by the shrinkage fatigue and aging of the expansion ring 2 and the cable wire 5, thereby fundamentally solving the problems that the electric leakage is capable of causing a hurt and the short circuit is capable of causing the machine damage which are caused by the water is impregnated into the terminal block, greatly increasing the security performance and service time of the submersible pump.
Description
Technical field
The present invention relates to a kind of submersible pump, specially refer to a kind of submersible electric pump cable introduced seal device.It can fundamentally solve the bad problem of outlet box air-tightness, effectively improves the security performance and the useful life of submersible pump.
Background technology
At present, the structure of existing submersible electric pump cable introduced seal device as shown in Figure 1, it comprises outlet lid 1, piston ring 2, copper compressing tablet 3 and hold-down bolt 4 on the motor casing, on the outlet lid 1 wire hole is arranged, piston ring 2 and copper compressing tablet 3 are sleeved on the cable 5 back successively and are pressed in the wire hole that outlet box covers with hold-down bolt 4, hold-down bolt 4 compresses piston ring 2 by copper compressing tablet 3, is sealed with realization by piston ring 2 jam-packed cables 5 again.Its sealing principle is: plastic deformations take place along cable 5 in piston ring 2, and a part is upwards clamp-oned in the gap between cable 5 and the copper compressing tablet 3, and another part is clamp-oned downwards to form in the gap between cable 5 and the wire hole and sealed.Not under the situation of fatigue aging, the sealing device of this structure can also play sealing effectiveness at piston ring 2 and cable 5.But, along with the immersible pump prolongation of service time, under the HTHP effect, piston ring 2 and cable 5 fatigue of contraction and aging, the random variation of the pressure of cable entry causes water to be penetrated on the interior terminal block of outlet box, causes the connector lug short circuit of cable.Piston ring 2 and cable 5 fatigue agings also can cause hold-down bolt 1 loosening.Certain following water depth is arranged during again owing to submersible pump work, under the effect of hydraulic pressure, the piston ring 2 of fatigue aging and the sealability between the cable 5 will lose efficacy, and cause out the air-tightness of line position bad, water is penetrated on the interior terminal block of outlet box, causing electric leakage to hurt sb.'s feelings and short circuit burning machine.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, and provide a kind of submersible electric pump cable introduced seal device, its can fundamentally solve because of between piston ring and cable fatigue of contraction and the aging piston ring and cable that causes, piston ring causes poor sealing to cause that cable lug short circuit, electric leakage are hurted sb.'s feelings and the problem of short circuit burning machine with pressure imbalance between the wire hole lower end, guarantees the air-tightness that cable introduced seal device is permanently effective.
Technical scheme of the present invention is: submersible electric pump cable introduced seal device comprises outlet lid, piston ring, copper compressing tablet and the hold-down bolt on the motor casing, and outlet box has covered wire hole, between hold-down bolt and piston ring pressure compensation mechanism is installed.
The further technical scheme of the present invention is: pressure compensation mechanism is the compression spring.
The present invention further technical scheme is: piston ring, copper compressing tablet, compression spring and spring base are sleeved on back on the cable successively and are pressed in the wire hole that outlet box covers with hold-down bolt.
The present invention is owing to be equipped with pressure compensation mechanism between hold-down bolt and piston ring, compared with prior art, can effectively solve because of piston ring and cable fatigue of contraction and the aging bad problem of outlet box air-tightness that causes, fundamentally solve water and be penetrated into the problem that the electric leakage that causes on the terminal block is hurted sb.'s feelings and machine is burnt in short circuit, the security performance and the useful life of improving submersible pump greatly.
Below in conjunction with the drawings and specific embodiments structure of the present invention is further described.
Description of drawings
Accompanying drawing 1 is the structural representation of existing submersible electric pump cable introduced seal device;
Accompanying drawing 2 is a structural representation of the present invention.
Embodiment
As shown in Figure 2: submersible electric pump cable introduced seal device comprises outlet lid 1, piston ring 2, copper compressing tablet 3, hold-down bolt 4, compression spring 6 and the spring base 7 on the motor casing, on the outlet lid 1 wire hole is arranged, piston ring 2, copper compressing tablet 3, compression spring 6 and spring base 7 are sleeved on back on the cable 5 successively and are pressed in the wire hole that outlet box covers with hold-down bolt 4, hold-down bolt 4 compresses piston ring 2 by spring base 7, compression spring 6 and copper compressing tablet 3, is sealed with realization by piston ring 2 jam-packed cables 5 again.
Sealing principle of the present invention is: piston ring 2 is pressed on the cable 5, and along cable 5 generation plastic deformations, a part is upwards clamp-oned in the gap between cable 5 and the copper compressing tablet 3, and another part clamp-ons downwards that formation seals in the gap between the wire hole on cable 5 and the outlet lid 1.In piston ring 2 and cable 5 fatigue of contraction and when aging, compression spring 6 makes copper compressing tablet 3 be pressed on the piston ring 2 all the time, pass to piston ring 2 by copper compressing tablet 3, compensation piston ring 2 and cable 5 fatigue of contraction and aging gap of causing hold-down bolt 4 to become flexible, if piston ring 2 and cable 5 fatigue of contraction and aging, spring 6 can compensate the distortion of piston ring 2 and cable 5, and then further compresses piston ring 2, makes piston ring 2 be pressed on the cable all the time; On the other hand, loosening because of piston ring 2 and cable 5 fatigue of contraction and the aging hold-down bolt that causes 4, the elastic force of spring 6 can compensatory pressure, and then compresses piston ring 2, plays the effect of sealing.
The assemble sequence of invention is: the piston ring 2 of packing into earlier, pack into successively then copper compressing tablet 3, spring 6, spring base 7, tighten with hold-down bolt 4 at last, constitute the sealing device that cable is introduced the position by piston ring 2, copper compressing tablet 3, spring 6, spring base 7 and hold-down bolt 4 and cable 5, utilize the elastic force of spring 6, because of piston ring 2 and cable 5 fatigue of contraction and the aging unbalance pressure that causes, guarantee the permanently effective sealing in cable introducing position between compensation piston ring 2 and the cable 5 and between piston ring 2 and the wire hole.
The present invention is not limited to above-mentioned concrete structure, just drops within protection scope of the present invention so long as the submersible electric pump cable introduced seal device of pressure compensation mechanism is installed between hold-down bolt 4 and piston ring 2.
Claims (3)
1. submersible electric pump cable introduced seal device, it comprises outlet lid, piston ring, copper compressing tablet and hold-down bolt on the motor casing, outlet box has covered wire hole, it is characterized in that between hold-down bolt and piston ring pressure compensation mechanism being installed.
2. submersible electric pump cable introduced seal device according to claim 1 is characterized in that pressure compensation mechanism is the compression spring.
3. submersible electric pump cable introduced seal device according to claim 2 is characterized in that piston ring, copper compressing tablet, compression spring and spring base are sleeved on back on the cable successively and are pressed in the wire hole that outlet box covers with hold-down bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100321934A CN101141083A (en) | 2006-09-05 | 2006-09-05 | Submersible electric pump cable introduced seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100321934A CN101141083A (en) | 2006-09-05 | 2006-09-05 | Submersible electric pump cable introduced seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101141083A true CN101141083A (en) | 2008-03-12 |
Family
ID=39192876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100321934A Pending CN101141083A (en) | 2006-09-05 | 2006-09-05 | Submersible electric pump cable introduced seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101141083A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876376B (en) * | 2009-04-30 | 2012-09-05 | 浙江中科德润科技有限公司 | Sealing device |
-
2006
- 2006-09-05 CN CNA2006100321934A patent/CN101141083A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876376B (en) * | 2009-04-30 | 2012-09-05 | 浙江中科德润科技有限公司 | Sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080312 |