CN2272958Y - Pump head and seat check structure - Google Patents
Pump head and seat check structure Download PDFInfo
- Publication number
- CN2272958Y CN2272958Y CN 95235521 CN95235521U CN2272958Y CN 2272958 Y CN2272958 Y CN 2272958Y CN 95235521 CN95235521 CN 95235521 CN 95235521 U CN95235521 U CN 95235521U CN 2272958 Y CN2272958 Y CN 2272958Y
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- CN
- China
- Prior art keywords
- pump
- pump head
- seat
- head
- pump seat
- 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.)
- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a pump head and seat check structure for an oil-submersible centrifugal pump. The utility model is characterized in that one end face of a pump head adjacent to the male thread of a pump seat is provided with an annular recess; the position adjacent to the active length of the male thread is distributed with a plurality of R-type circular arc channels around the circumference. An axial direction through hole is arranged between each circular arc channel and male thread; the inner part of each through hole is equipped with a check bolt; one part of the check bolt protruding from the R-type circular arc channel is equipped with an elastic ring and a check nut. The check nut is tightened by force to make the male thread create elastic deformation, in order to make the screw thread pair between the pump head, the pump seat and a pump case lock up automatically and obtain the purpose of preventing a reverse buckle from loosing. The utility model overcomes the disadvantage that a welded anti-reverse buckle plate can cause eccentricity.
Description
The utility model relates to a kind of pump head and the pump seat anti-loose structure of the electric submersible centrifugal pump of oil field lifting fluid from oil well, particularly electric submersible centrifugal pump.
At present, the electric submersible centrifugal pump of U.S. Reda company, ODI company, CL company and domestic production, in order to prevent that anti-motor counter-rotating back-off gets loose because of power phase connects for pump head, pump seat and pump case scyewed joint place, the method of taking is after pump head, pump seat and pump case assembling finish, several the anti-down buckles of burn-oning at screw pair connection circumferential weld place.Through welding, pump head, pump seat and pump case must be pulled on one side, make the axis disalignment of pump head, pump seat and housing.This disalignment has not only caused the bending of each assembly parts such as centrifugal pump itself, but also will make each total member joint produce " V " bending.Under the centrifugal pump high speed rotating state, will cause pump shaft and alignment bearing to wear and tear fast, influence the service life of electric submersible pump unit.Another shortcoming is pump head of every mounting or dismounting and pump seat, all will weld, slice off anti-down buckle, when both taking a lot of work, causes the weld damage again.
The purpose of this utility model just is, at the shortcoming that above-mentioned prior art exists, under the situation that does not change original pump head and pump seat size, pump head, pump seat are improved with the structure that the pump case screw pair connects, increase the frictional force between its screw pair, thereby prevent that the screw pair back-off from getting loose.
Above-mentioned purpose is realized by following technical proposals:
Pump head and pump seat anti-loose structure all adopt the screw pair connecting mode between the pump head of upper end and the pump seat of lower end and the pump case, and pump head and pump seat all have external screw thread.It is characterized in that: pump head and pump seat external screw thread have a circular groove near the end.Near external screw thread effective length place 2～6 the R shape arc grooves that are uniformly distributed along the circumference.An axial hole is arranged between each arc groove and the external screw thread end face.Through hole endoporus dress chek bolt, bolt is equipped with spring washer, lock nut and cotter pin etc. from R shape arc groove extension.After the external screw thread of pump head, pump seat and the assembling of the female thread of pump case, again lock nut is tightened, made external screw thread produce resiliently deformable, increase the frictional force between the screw pair, reach the locking purpose of screw thread self-locking.
Above-mentioned pump head and pump seat anti-loose structure, the circular groove of its pin-end be apart from 3～5 millimeters of end faces, 2～3 millimeters of the width of groove, and the degree of depth of groove is required to decide by its pin-end amount of deformation.
Above-mentioned pump head and pump seat anti-loose structure wherein are equipped with seal washer between pump head, pump seat and the spring washer.Be used for preventing that well liquid spills from checknut in the pump.
Above-mentioned pump head and pump seat anti-loose structure, chek bolt head wherein is more than half cylindrical body, lacking part is a plane.It is outer as far as possible to help chek bolt, and bolt does not rotate when helping tightening lock nut yet, increases the external screw thread amount of deformation.
Accompanying drawing 1 is the axial sectional structure schematic representation of the utility model pump head anti-loose structure.
Accompanying drawing 3 is A-A view profiles of accompanying drawing 1,2.
Accompanying drawing 4 is B-B view profiles of accompanying drawing 1,2.
Details are as follows to embodiment of the present utility model in conjunction with the accompanying drawings:
In the accompanying drawing 1: the 1st, centrifugal pump shaft; The 2nd, locking pump head; The 3rd, lock nut: the 4th, spring washer; The 5th, chek bolt; The 6th, cotter pin; The 7th, O type rubber seal; The 8th, the centrifugal pump pump case; The 9th, lead shell and compress pipe.Seal washer between spring washer 4 and the locking pump head 2 does not draw.
In the accompanying drawing 2: the 1st, centrifugal pump shaft; The 8th, the centrifugal pump pump case; The 9th, lead shell and compress pipe; The 10th, O grommet type seal circle; The 11st, lock nut; The 12nd, spring washer; The 13rd, chek bolt; The 14th, cotter pin; The 15th, locking pump head.Seal washer between spring washer 12 and the locking pump seat 15 does not draw.
Shown in Figure 1: locking pump head 2, lock nut 3, spring washer 4, chek bolt 5, cotter pin 6 and seal washer have constituted the pump head anti-loose structure assembly of oil-submersible centrifugal pump upper end.
Shown in Figure 2: lock nut 11, spring washer 12, chek bolt 13, cotter pin 14, locking pump seat 15 and seal washer have constituted the pump seat anti-loose structure assembly of oil-submersible centrifugal pump lower end.
Locking pump head 2 and locking pump seat 15 are assembled into one by screw pair mode and pump case 8.In order to prevent that the screw pair back-off from getting loose, taked the locking assembly structure form of locking assembly of above-mentioned pump head and pump seat.Lock nut 3 and 11 is tightened, and the external screw thread that makes pump head 2 and pump seat 15 produces resiliently deformable and self-locking can reach locking purpose.In order to realize 2 and 15 external screw thread resiliently deformable, locate to process a circular groove for 3～5 millimeters at external screw thread end face from 2 and 15,2～3 millimeters of the width of groove, the degree of depth of groove is required to decide by its pin-end amount of deformation.For chek bolt and nut are installed, present embodiment has respectively bored 4 axial holes on pump head 2 and pump seat 15, and has respectively processed 4 R type arc grooves more than the external screw thread effective length at it.Locking between lock nut and the bolt with cotter pin, see shown in the accompanying drawing 3.The chek bolt head is more than half cylindrical shape, helps the bolt outer installation of trying one's best, and bolt does not rotate when helping tightening lock nut yet, increases the external screw thread amount of deformation.See shown in the accompanying drawing 4.
Claims (4)
1, a kind of pump head and pump seat anti-loose structure, all adopt the screw pair connecting mode between the pump head of upper end and the pump seat of lower end and the pump case, pump head and pump seat all have external screw thread, it is characterized in that: pump head and pump seat external screw thread have a circular groove near the end, near external screw thread effective length place 2～6 the R type arc grooves that are uniformly distributed along the circumference, an axial hole is arranged between each arc groove and the external screw thread end face, dress chek bolt in the hole, bolt is equipped with spring washer, lock nut and cotter pin etc. from R type arc groove extension.
2, according to described pump head of claim 1 and pump seat anti-loose structure, it is characterized in that: the circular groove of pump head and pump seat pin-end is apart from 3～5 millimeters of end faces, 2～3 millimeters of the width of groove, and the degree of depth of groove is required to decide by its pin-end amount of deformation.
3, pump head according to claim 1 and pump seat anti-loose structure is characterized in that: between pump head, pump seat and the spring washer seal washer is housed.
4, pump head according to claim 1 and pump seat anti-loose structure, it is characterized in that: the chek bolt head is more than half cylindrical body, lacking part is a plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235521 CN2272958Y (en) | 1995-12-30 | 1995-12-30 | Pump head and seat check structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235521 CN2272958Y (en) | 1995-12-30 | 1995-12-30 | Pump head and seat check structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2272958Y true CN2272958Y (en) | 1998-01-21 |
Family
ID=33879125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95235521 Expired - Fee Related CN2272958Y (en) | 1995-12-30 | 1995-12-30 | Pump head and seat check structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2272958Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926007A (en) * | 2011-08-13 | 2013-02-13 | 苏州敏喆机械有限公司 | Vertical pump base |
| CN109821984A (en) * | 2019-04-11 | 2019-05-31 | 成都纵远机械设备有限公司 | A kind of manufacturing equipment for glass solidified body storage container |
-
1995
- 1995-12-30 CN CN 95235521 patent/CN2272958Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926007A (en) * | 2011-08-13 | 2013-02-13 | 苏州敏喆机械有限公司 | Vertical pump base |
| CN109821984A (en) * | 2019-04-11 | 2019-05-31 | 成都纵远机械设备有限公司 | A kind of manufacturing equipment for glass solidified body storage container |
| CN109821984B (en) * | 2019-04-11 | 2024-04-26 | 成都纵远机械设备有限公司 | Manufacturing equipment for glass solidified body storage container |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |