CN2200706Y - Hydraulic terminal device of reciprocating plunger pump - Google Patents
Hydraulic terminal device of reciprocating plunger pump Download PDFInfo
- Publication number
- CN2200706Y CN2200706Y CN 94225590 CN94225590U CN2200706Y CN 2200706 Y CN2200706 Y CN 2200706Y CN 94225590 CN94225590 CN 94225590 CN 94225590 U CN94225590 U CN 94225590U CN 2200706 Y CN2200706 Y CN 2200706Y
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- head body
- plunger
- pump head
- pump
- ring cavity
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- Expired - Fee Related
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Abstract
The utility model provides a self-cooling hydraulic end device with constant pressure difference for a reciprocating plunger pump. The plunger sealing element of the utility model is provided with a differential ladder plunger and a two-stage sealing structure with a main seal and an auxiliary seal. The main seal bears the high pressure difference between a pump chamber and a low pressure chamber, and the auxiliary stage seal bears the low pressure difference between the low pressure chamber and the outer end of the plunger. The self-cooling hydraulic end device with constant pressure difference effectively overcomes the problem of external leakage. Internal leakage liquid leaking from the pump chamber to the low pressure chamber is carried back to the pump chamber in the next liquid imbibing process. The self-cooling hydraulic end device with constant pressure difference effectively prevents damages caused by the internal leakage. Since a high pressure sealing element is cooled by inhaling liquid, the service life and the repair cycle are prolonged. The self-cooling hydraulic end device with constant pressure difference is especially suitable for a horizontal high-pressure reciprocating plunger pump for oil fields.
Description
The utility model relates to the fluid end device of reciprocating pump, particularly a kind of constant-pressure drop self-cooled fluid end device that is used for the horizontal high-pressure reciprocating pump.
Both at home and abroad mainly there is two large problems in the fluid end of horizontal high-pressure reciprocating pump, the leakage of first plunger and Sealing gap location, and it two is Sealing frictional heatings.Especially commonly used 3ZB plunger pump, A159 plunger pump, the 3H plunger pump in oil field when being used for pumping sewage, has only hundreds of hour the average life of its stuffing box packing.If the serious and untimely maintenance of abrasion, its leakage that leaks will become continuous wire to flow out; Its internal leakage liquid will form the rock salt crystallization in the middle box, even can pollute sump, the bearing liner burnout accident occurs.In order to address the above problem, taked some measures from the structure and material aspect, the guide sleeve place in the middle of the Sealing of the front and back of its fluid end sealed letter body is provided with radial hole, and high pressure injects and isolates oil inwards, enter seal clearance with prevention sewage, and lubrication is arranged.But in fact because oiling pressure must be higher than delivery side of pump pressure, this just makes part isolation oil enter pump and is taken away by sewage that some enters middle box, causes a large amount of wastes of isolating oil.The employing rubber-plastics material and the carbon fiber that have are manufactured Sealing, but because of pushed by highly pressurised liquid, frictional force is bigger between Sealing and the plunger, can reach 90 ℃ during pumping sewage, during crude oil that pumping is 60～80 ℃, temperature rise is higher, and only cools off by immobilising air in the middle box, the cooling-down effect extreme difference still fundamentally solves problem in its in the end so change sealing material in working life.
The purpose of this utility model just is the shortcoming and defect part at prior art, is improved from structure itself, and the horizontal high-pressure reciprocating pump commonly used for the oil field provides a kind of constant-pressure drop self-cooled fluid end that matches.It can significantly reduce external leakage, and the harm that can avoid internal leakage to cause again can be leaned on the self cooling cooling of pumped medium again, thereby improves seal durability greatly, prolongs the repair cycle of pump greatly.
Above-mentioned purpose of the present utility model is realized by following technical proposals:
The fluid end of this reciprocating pump is made up of plunger seal letter, pump head body, suction valve and expulsion valve, and plunger seal letter, suction valve and expulsion valve all are installed on the pump head body.Its plunger seal letter adopts differential type ladder plunger and major and minor two-stage sealing configuration.Ladder plunger leading portion thicker part divides with the primary seal that bears High Pressure Difference and matches, and the thin part of ladder plunger back segment matches with the secondary Sealing that bears low differential pressure.Sealed letter is an overall structure, is made up of frame, internal chamber wall, rear end pressure cap, preceding guide sleeve, back guide sleeve, front compression spring, rear compression spring, primary seal and secondary Sealing.The thick back segment of pump head body inner chamber leading portion is thin, matches with sealed letter shell external diameter, and fitting tight letter integral body pushes from the pump head body front end.Suction valve places pump head body latter half of, and expulsion valve places the pump head body first half.Constitute pump chamber between the thick section of the leading portion of sealed letter frame and plunger, and constitute the high pressure ring cavity between the pump head body.Constitute between sealed letter frame stage casing and the pump head body and suck ring cavity.Constitute the low pressure ring cavity between sealed letter internal chamber wall and the plunger thin segment.Be communicated with by pressure hole between pump chamber and the high pressure ring cavity.Suck between ring cavity and the low pressure ring cavity and be communicated with by the low pressure hole.Be communicated with by the interior intercommunicating pore on the pump head body between the outlet of high pressure ring cavity and suction valve.Inlet hole on the pump head body will suck ring cavity and be communicated with the suction runner.
Guide sleeve and pressure spring respectively are equipped with in the major and minor Sealing front of above-mentioned reciprocating pump fluid end; both helped plunger guide; can regulate the radial pressure at Sealing and plunger interface again automatically, help protecting Sealing and keep its left and right sides constant pressure differential.
The sealed letter shell at the primary seal position of above-mentioned reciprocating pump fluid end all is immersed in low-pressure low-temperature and the flowing liquid medium, helps the Sealing radiating and cooling.
Be screw-thread fit between the sealed letter frame of above-mentioned reciprocating pump fluid end and the rear end pressure cap, and can regulate axial spacing, be beneficial to regulate axial pressing force.
The sealed letter frame of above-mentioned reciprocating pump fluid end cooperates the step place, stage casing at interface with pump head body inner cavity chamber, open a radial hole in the pump head body bottom, if there is pumping liquid to flow out from aperture, then shows poor sealing herein.
The pump head body of above-mentioned reciprocating pump fluid end is the whole hierarchic structure of being inverted, and is the plane above, is ladder surface below, makes its compact structure, and helps the sealed letter radiating and cooling.
Two runner holes of suction valve and expulsion valve are installed on the pump head body of above-mentioned reciprocating pump fluid end, vertically parallel on same horizontal plane, make its place's compact and reasonable that communicates with the sealed letter chamber.
The suction valve of above-mentioned reciprocating pump fluid end and expulsion valve are identical appearance volume unit structure, and integral body is packed into, adopt the fastening mounting type of pressing plate to be installed on the pump head body, help integral disassembly, assembly and change.
Owing to taked above technological scheme, particularly owing to adopted differential type ladder plunger and major and minor two-stage sealing overall structure, develop a kind of constant-pressure drop self-cooled fluid end for reciprocating pump, solved liquid medium external leakage and Sealing radiating and cooling two big technical barriers effectively.In a single day the high-pressure medium of pump chamber enters low pressure medium ring cavity from primary seal, just mix with the low piezodielectric that sucks ring cavity, is drawn into pump chamber by next suction process, and such internal leakage can not work the mischief to pump.Because the pressure reduction that low pressure seal bears is little and constant, so the external leakage of liquid medium is eliminated fully.Sucking ring cavity, to be in the low pressure liquid medium of flowing state splendid to the self cooling result of high-pressure sealing ring, and the repair cycle of its working life and pump all prolongs greatly.
Accompanying drawing is the structural representation of the plunger of reciprocating pump fluid end device that provides of the utility model.
As seen from the figure, this fluid end device is made up of plunger seal letter assembly, pump head body, suction valve and expulsion valve.Plunger seal letter wherein comprises ladder plunger 1 and integral seal letter assembly.The sealed letter assembly is made up of rear end pressure cap 2, frame 3, internal chamber wall 4, secondary Sealing (low pressure) 5, back guide sleeve 6, back pressure spring 7, primary seal (high pressure) 8, preceding guide sleeve 9 and preceding pressure spring 10.Pump head body 11 is inverted trapezium structure for integrated type, and its inner cavity chamber's first half diameter is greater than latter half of diameter, and plunger seal letter assembly pushes inner cavity chamber from pump head body front end integral body during assembling.Suction valve 12 and expulsion valve 13 are overall structure and are installed in pump head body 11 tops.Constitute high pressure pump chamber A between thick section of pump head body 11 and plunger 1, and constitute low pressure ring cavity B between the thin segment.Anterior formation high pressure ring cavity C between sealed letter housing 3 and the pump head body 11, the rear portion constitutes suction ring cavity D.E sucks runner, and F is an inlet hole, and G is the low pressure hole, and H is interior linked hole, and I is a pressure hole, and J is the sealing peep hole.
The working principle of this fluid end is: when plunger 1 was imbibition stroke (to the Zola), expulsion valve 13 cut out, and suction valve 12 is opened.Inhalant liquid enters inlet hole F from sucking runner E, enter and inhale ring cavity D, the internal leakage liquid that enters the B chamber from pump chamber A through primary seal 8 enters the D chamber through low pressure hole G, enters suction valve with the inhalant liquid in D chamber, enter high pressure ring cavity C through interior intercommunicating pore H again, be full of pump chamber A through pressure hole I again.When plunger 1 was discharge opeing stroke (pushing away) to the right, expulsion valve 13 was opened, and suction valve 12 cuts out.The pushing that liquid among the pump chamber A is subjected to plunger 1 enters high pressure ring cavity C through pressure hole I, again outside expulsion valve 13 and discharge opeing runner (not drawing among the figure) excavationg pump.Meanwhile, the liquid that sucks in the runner E enters low pressure ring cavity B through hole F, ring cavity D, hole G, to replenish the void volume that ladder plunger 1 forms in discharge process, the constant pressure differential of both having kept major and minor Sealing and being born is constant, makes pumping cylinder increase by a differential hydraulic thrust again in discharging stroke.If pump head body 11 cooperates interfacial seal bad with sealed letter frame 3 step places, pumping liquid will come out from peep hole J seepage flow.
Reciprocal three plungers of horizontal high-pressure that this fluid end is specially adapted to use in the oil field are to five-plunger pump.
Claims (8)
1, a kind of fluid end device of reciprocating pump, by the plunger seal letter, pump head body, suction valve and expulsion valve are formed, the plunger seal letter, suction valve and expulsion valve all are installed on the pump head body, it is characterized in that the plunger seal letter adopts differential type ladder plunger and master, secondary two-stage sealing configuration, ladder plunger leading portion thicker part divides with the primary seal that bears High Pressure Difference and matches, the thin part of ladder plunger back segment matches with the secondary Sealing that bears low differential pressure, sealed letter is an overall structure, by frame, internal chamber wall, the rear end pressure cap, preceding guide sleeve, back guide sleeve, front compression spring, rear compression spring, primary seal and secondary Sealing are formed, the thick back segment of pump head body inner chamber leading portion is thin, match with Sealing letter shell external diameter, suction valve places pump head body latter half of, expulsion valve places the pump head body first half, constitute pump chamber between the thick section of the leading portion of sealed letter frame and plunger, and constitute the high pressure ring cavity between the pump head body, constitute between sealed letter frame stage casing and the pump head body and suck ring cavity, constitute the low pressure ring cavity between sealed letter internal chamber wall and the plunger thin segment, be communicated with by pressure hole between pump chamber and the high pressure ring cavity, suck between ring cavity and the low pressure ring cavity and be communicated with by the low pressure hole, the high pressure ring cavity is communicated with by the interior intercommunicating pore on the pump head body with the suction valve outlet, and the inlet hole on the pump head body will suck ring cavity and be communicated with suction passage.
2, the fluid end of reciprocating pump according to claim 1 is characterized in that major and minor Sealing front respectively is equipped with guide sleeve and pressure spring.
3, the fluid end of reciprocating pump according to claim 1 is characterized in that the sealed letter shell at primary seal position all is immersed in low-pressure low-temperature and the flowing liquid medium.
4, the fluid end of reciprocating pump according to claim 1 is characterized in that being screw-thread fit between can body and the rear end pressure cap, and can regulate axial spacing.
5, the fluid end of reciprocating pump according to claim 1 is characterized in that the sealed letter frame cooperates the stage casing at interface to close the place, rank with pump head body inner cavity chamber, open a radial hole as the sealing condition peep hole in the pump head body bottom.
6, the fluid end of reciprocating pump according to claim 1 is characterized in that pump head body is to be inverted trapezium structure, is the plane above, is ladder surface below.
7, the fluid end of reciprocating pump according to claim 1, two runner holes that it is characterized in that on the pump head body installing suction valve and expulsion valve, vertically parallel on same horizontal plane.
8, the fluid end of reciprocating pump according to claim 1 is characterized in that suction valve and expulsion valve are identical appearance volume unit structure, and integral body is packed into, adopts the fastening mounting type of pressing plate to be installed on the pump head body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94225590 CN2200706Y (en) | 1994-01-11 | 1994-01-11 | Hydraulic terminal device of reciprocating plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94225590 CN2200706Y (en) | 1994-01-11 | 1994-01-11 | Hydraulic terminal device of reciprocating plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2200706Y true CN2200706Y (en) | 1995-06-14 |
Family
ID=33838748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94225590 Expired - Fee Related CN2200706Y (en) | 1994-01-11 | 1994-01-11 | Hydraulic terminal device of reciprocating plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2200706Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348862C (en) * | 2004-12-09 | 2007-11-14 | 兰州理工大学 | Double action radial plunger pump |
| CN102022611A (en) * | 2009-09-23 | 2011-04-20 | 贺勍 | Novel lubricating pump and volume occupation grease discharging method for preventing plunger and cylinder body from being worn |
| CN101634296B (en) * | 2009-07-22 | 2011-08-10 | 鲍春 | High-pressure slurry-casting ram pump piston system with split rear cover |
| CN102927280A (en) * | 2012-11-02 | 2013-02-13 | 宁波合力机泵有限公司 | Circulation balance sealing box assembly of plunger pump |
| CN103256217A (en) * | 2013-05-10 | 2013-08-21 | 浙江大学 | Axial plunger pump return-stroke mechanism |
| CN105190036A (en) * | 2014-01-09 | 2015-12-23 | 株式会社信行 | Booster pump for transferring high-viscosity liquid |
| CN107701417A (en) * | 2017-05-05 | 2018-02-16 | 宁波钱湖石油设备有限公司 | A kind of reciprocating pump hydraulic-end structure |
| CN108869268A (en) * | 2018-06-28 | 2018-11-23 | 宁波钱湖石油设备有限公司 | High pressure liquid housing structure and Vertical Combination valve group |
| CN109253077A (en) * | 2018-10-26 | 2019-01-22 | 无锡书谱尔精密机械科技有限公司 | Rotary valve pump |
-
1994
- 1994-01-11 CN CN 94225590 patent/CN2200706Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348862C (en) * | 2004-12-09 | 2007-11-14 | 兰州理工大学 | Double action radial plunger pump |
| CN101634296B (en) * | 2009-07-22 | 2011-08-10 | 鲍春 | High-pressure slurry-casting ram pump piston system with split rear cover |
| CN102022611A (en) * | 2009-09-23 | 2011-04-20 | 贺勍 | Novel lubricating pump and volume occupation grease discharging method for preventing plunger and cylinder body from being worn |
| CN102927280A (en) * | 2012-11-02 | 2013-02-13 | 宁波合力机泵有限公司 | Circulation balance sealing box assembly of plunger pump |
| CN102927280B (en) * | 2012-11-02 | 2015-07-08 | 宁波合力机泵有限公司 | Circulation balance sealing box assembly of plunger pump |
| CN103256217A (en) * | 2013-05-10 | 2013-08-21 | 浙江大学 | Axial plunger pump return-stroke mechanism |
| CN103256217B (en) * | 2013-05-10 | 2015-11-25 | 浙江大学 | A kind of axial plunger pump return-stroke mechanism |
| CN105190036A (en) * | 2014-01-09 | 2015-12-23 | 株式会社信行 | Booster pump for transferring high-viscosity liquid |
| CN107701417A (en) * | 2017-05-05 | 2018-02-16 | 宁波钱湖石油设备有限公司 | A kind of reciprocating pump hydraulic-end structure |
| CN108869268A (en) * | 2018-06-28 | 2018-11-23 | 宁波钱湖石油设备有限公司 | High pressure liquid housing structure and Vertical Combination valve group |
| WO2020000617A1 (en) * | 2018-06-28 | 2020-01-02 | 宁波钱湖石油设备有限公司 | High pressure liquid cylinder structure and vertical type combination valve group |
| CN109253077A (en) * | 2018-10-26 | 2019-01-22 | 无锡书谱尔精密机械科技有限公司 | Rotary valve pump |
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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 |