CN103195699A - Pump head self-enhancing seal structure and self-enhancing device for pump head - Google Patents
Pump head self-enhancing seal structure and self-enhancing device for pump head Download PDFInfo
- Publication number
- CN103195699A CN103195699A CN2013101354282A CN201310135428A CN103195699A CN 103195699 A CN103195699 A CN 103195699A CN 2013101354282 A CN2013101354282 A CN 2013101354282A CN 201310135428 A CN201310135428 A CN 201310135428A CN 103195699 A CN103195699 A CN 103195699A
- Authority
- CN
- China
- Prior art keywords
- pump head
- hole
- head body
- valve
- pressure
- 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.)
- Granted
Links
Images
Landscapes
- Fuel-Injection Apparatus (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a pump head self-enhancing seal structure and a self-enhancing device for a pump head, and belongs to the technical field of pump head self-enhancement. The pump head self-enhancing seal structure comprises an end cover, a high-pressure pump head, a discharge hole, a suction hole, a through hole and a plunger hole. The discharge hole, the suction hole, the through hole and the plunger hole are arranged in the high-pressure pump head in a cross manner. The end cover is mounted on an inner thread of the plunger hole of the high-pressure pump body. The self-enhancing device comprises a low-pressure unit and a high-pressure unit, and the low-pressure unit is connected with a water feed pipe of the high-pressure unit through an ultrahigh-pressure pressurizer. During self-enhancement of the pump body, the self-enhancing device can realize loading and pressure maintaining in the process of self-enhancement and pressurization of the pump body through adjustment of the low-pressure unit. The problems that requirements on accurate pressure adjustment, step-by-step loading, pressure maintaining and step-by-step unloading cannot be met by an existing self-enhancing device for the pump head can be solved. A preset elastic-plastic deformation of the high-pressure pump head can be realized, and the purpose of improving fatigue strength of the high-pressure pump head can be achieved.
Description
Technical field
The self intensification sealing configuration that the present invention relates to a kind of pump head body reaches the self intensification device that is used for pump head body, belongs to pump head body self intensification technical field.
Background technique
The self intensification technology of fracturing pump pump head body is along with the development of fracturing technology new developing technology progressively, in the process of pump head body self intensification, usually at the inner highly pressurised liquid that feeds about 500MPa of pump head body, make the pump head body inner layer material under the effect of superhigh pressure liquid, plastic deformation take place, and cladding material still is in the resiliently deformable stage, behind the internal high pressure removal, cladding material compression inner layer material produces residual stress.Because the existence of this residual stress is reduced the maximum stress of pump head body when work, integrated stress distributes more even, particularly can improve the stress at intersecting line place in the pump head body and concentrate situation, thus the fatigue life of improving pump head body effectively.But in actual mechanical process, the normal method that adopts the hydraulic pressure self intensification is handled in the self intensification of pump head body, namely pump head body inside is four through holes that crosswise arranges---after tapped hole, taper hole, taper hole and the taper hole plug for seal, feed highly pressurised liquid in inside.Because the situation that highly pressurised liquid leaks takes place in the reasons in structure of existing pump head body through hole often in the process of pump head body self intensification, cause the pump head body self intensification not reach optimum efficiency.On the other hand, though present pump head body self intensification device can reach the pressure of 500MPa, in the self intensification process, accurately regulate pressure, realize multistep loading step by step, pressurize and the functional requirement that progressively unloads but can not satisfy pump head body.
Summary of the invention
The objective of the invention is to: provide a kind of and can safely, effectively solve pump head body self intensification process mesohigh sealing problem, and can directly satisfy pump head body and in the self intensification process, accurately regulate pressure, and realize multistep loading step by step, pressurize and progressively the high pressure pump head body of offloading functions requirement the self intensification sealing configuration and be used for the self intensification device of this pump head body.
The present invention solves the problems referred to above by the following technical solutions:
A kind of self intensification sealing configuration of high pressure pump head body, comprise and be tap hole, inlet hole, through hole and the plunger hole that crosswise arranges in end cap, high pressure pump head body, the high pressure pump head body, it is characterized in that: the plunger hole internal thread of high pressure pump head body is equipped with end cap, and the taper gland is installed in the cone-shaped inner hole of end cap; The tap hole of described high pressure pump head body, inlet hole and through hole are respectively cone shape hole, be separately installed with circular cone by fixed plate and screw in tap hole, inlet hole and the through hole, be respectively arranged with seal groove on described taper gland and the circular cone, seal ring is installed in the seal groove, and described taper gland is provided with highly pressurised liquid and enters the hole.
The self intensification device that is used for above-mentioned high pressure pump head body, it is made of low voltage unit and high voltage unit, it is characterized in that: low voltage unit is by fuel tank, fuel tank switch, oil pump, filter A, one-way valve, three position four-way electromagnetic valve, series flow control valve A, series flow control valve B, pressure gauge A, pressure gauge B, high pressure turbocharger, relief valve A, cooler and oil temperature gauge constitute, fuel supply line and return tube are installed on the fuel tank, fuel tank is connected with high pressure turbocharger by three position four-way electromagnetic valve with return tube by fuel supply line, is separately installed with series flow control valve A on the fuel supply line between three position four-way electromagnetic valve and the high pressure turbocharger and the return tube, pressure gauge A and series flow control valve B, pressure gauge B; Fuel tank switch, oil pump, filter A, one-way valve and cooler, oil temperature gauge are installed respectively on the fuel supply line between fuel tank and the three position four-way electromagnetic valve and the return tube successively; Be communicated with by relief valve A between fuel supply line between fuel tank and the three position four-way electromagnetic valve and the return tube.
High voltage unit is made of water tank, tank switch, water pump, filter B, high-pressure manometer, safety valve, pump head body fitting seat, controlled Decompression valves, two-position-five-way solenoid valve, relief valve B, reduction valve, water pipe is housed on the water tank, and water tank is communicated with the pump head body fitting seat by water pipe; Tank switch, water pump, filter B, high-pressure manometer and safety valve are installed on the water pipe successively; On the water pipe of high-pressure manometer one side return pipe is housed, return pipe is communicated with water tank, controlled Decompression valves and reduction valve are installed on the described return pipe successively, on the controlled Decompression valves two-position-five-way solenoid valve is housed, on the return pipe between reduction valve and the water tank be housed the connecting tube that is connected with water pipe, relief valve B was housed on connecting tube.
Low voltage unit is communicated with the water pipe of high voltage unit by high pressure turbocharger.
Beneficial effect of the present invention is:
The self intensification design of Sealing Structure novelty of this high pressure pump head body, simple in structure, by taper gland and circular cone respectively with end cap and tap hole, inlet hole, the cooperation of through hole, make it after feeding highly pressurised liquid, form self-tightening sealing, efficiently solve existing pump head body because the reasons in structure of through hole, the situation that highly pressurised liquid leaks takes place in the process of pump head body self intensification often, cause the pump head body self intensification not reach the problem of optimum efficiency, simultaneously by the seal ring on taper gland and the circular cone, can prevent the leakage of micro-gap between the conical surface, with the stability that guarantees that pump head body under high pressure seals.This high pressure pump head body is when self intensification, and by the low voltage terminal supply pressure oil of high pressure turbocharger, the low-pressure water that supply channel provides is after the pressurized machine supercharging, and the high-pressure water of generation enters pump head body by the high service pipeline.Series flow control valve by the self intensification device and three position four-way electromagnetic valve are realized loading in the pump head body self intensification pressure process and the process of pressurize then; In the process of self intensification unloading, by regulating series flow control valve, controlled Decompression valves and two-position-five-way solenoid valve, realize the progressively pressure leak process of pump head body.The working procedure of this self intensification device is to press P in the limit of elasticity with the high pressure pump head body
0Be initial from strengthen pressure, then according to this pressure P
05% amplification progressively increases, up to being loaded into maximum from strengthen pressure P
MAX, in the process of unloading, according to maximum from strengthen pressure P
MAX10%, both P
MAX5% the load width of cloth progressively unloads, until being unloaded to 0.Efficiently solve that existing pump head body self intensification device can not satisfy that pump head body is accurately regulated pressure, realized multistep loading step by step in the self intensification process, pressurize and the problem of offloading functions requirement progressively.
Description of drawings
Fig. 1 is the structural representation of high pressure pump head body of the present invention;
Fig. 2 is the structure for amplifying schematic representation at Figure 1A place;
Fig. 3 is the structural representation of self intensification device of the present invention.
Among the figure: 1, the high pressure pump head body, 2, end cap, 3, tap hole, 4, inlet hole, 5, through hole, 6, plunger hole, 7, the taper gland, 8, highly pressurised liquid enters the hole, 9, fixed plate, 10, screw, 11, circular cone, 12, seal ring, 13, low voltage unit, 14, high voltage unit, 15, fuel tank, 16, fuel tank switch, 17, oil pump, 18, filter A, 19, one-way valve, 20, three position four-way electromagnetic valve, 21, series flow control valve A, 22, series flow control valve B, 23, pressure gauge A, 24, pressure gauge B, 25, high pressure turbocharger, 26, relief valve A, 27, cooler, 28, oil temperature gauge, 29, fuel supply line, 30, return tube, 31, water tank, 32, tank switch, 33, water pump, 34, filter B, 35, high-pressure manometer, 36, safety valve, 37, the pump head body fitting seat, 38, controlled Decompression valves, 39, two-position-five-way solenoid valve, 40, relief valve B, 41, reduction valve, 42, water pipe, 43, return pipe, 44, connecting tube.
Embodiment
The self intensification sealing configuration of this high pressure pump head body comprises tap hole 3, inlet hole 4, through hole 5 and the plunger hole 6 that is the crosswise setting in end cap 2, high pressure pump head body 1, the high pressure pump head body 1.Plunger hole 6 internal threads of high pressure pump head body 1 are equipped with end cap 2, and taper gland 7 is installed in the cone-shaped inner hole of end cap 2.Taper gland 7 is provided with highly pressurised liquid and enters hole 8.
The tap hole 3 of high pressure pump head body 1, inlet hole 4 and through hole 5 are respectively cone shape hole.Be separately installed with circular cone 11 by fixed plate 9 and screw 10 in tap hole 3, inlet hole 4 and the through hole 5.Be respectively arranged with seal groove on the circumference of taper gland 7 and circular cone 11, seal ring 12 is installed in the seal groove.
High pressure pump head body 1 carries out the rough machined while, at first the internal chiasma hole (intersecting line) of high pressure pump head body 1 is located to process, and after self intensification is finished, no longer the intersecting line place is carried out secondary operations, and the useful residual stress at intersecting line place is not subdued because of processing.Process big mouthful towards the taper of inside at tap hole 3, inlet hole 4 and through hole 5 simultaneously, process screw thread at plunger hole 6, again end cap 2 screw threads are installed on the plunger hole 6, circular cone 11 are installed in respectively on tap hole 3, inlet hole 4 and the through hole 5 by fixed plate 9 and screw 10 get final product simultaneously.
High pressure pump head body 1 is when self intensification, and high pressure pump head body 1 is installed on the self intensification device by pump head body fitting seat 37.The self intensification device is made of low voltage unit 13 and high voltage unit 14.Low voltage unit 13 is made of fuel tank 15, fuel tank switch 16, oil pump 17, filter A18, one-way valve 19, three position four-way electromagnetic valve 20, series flow control valve A21, series flow control valve B22, pressure gauge A23, pressure gauge B24, high pressure turbocharger 25, relief valve A26, cooler 27 and oil temperature gauge 28, fuel supply line 29 and return tube 30 are installed on the fuel tank 15, and fuel tank 15 is connected with high pressure turbocharger 25 by three position four-way electromagnetic valve 20 with return tube 30 by fuel supply line 29.
Be separately installed with series flow control valve A21, pressure gauge A23 and series flow control valve B22, pressure gauge B24 on fuel supply line 29 between three position four-way electromagnetic valve 20 and the high pressure turbocharger 25 and the return tube 30.Fuel tank switch 16, oil pump 17, filter A18, one-way valve 19 and cooler 27, oil temperature gauge 28 are installed respectively on the fuel supply line 29 between fuel tank 15 and the three position four-way electromagnetic valve 20 and the return tube 30 successively; Be communicated with by relief valve A26 between fuel supply line 29 between fuel tank 15 and the three position four-way electromagnetic valve 20 and the return tube 30.The effect of relief valve A26 is to make unnecessary fluid flow back to fuel tank 15.
Controlled Decompression valves 38 and reduction valve 41 are installed on the return pipe 43 successively, on the controlled Decompression valves 38 two-position-five-way solenoid valve 39 is housed, on the return pipe 43 between reduction valve 41 and the water tank 31 be housed the connecting tube 44 that is connected with water pipe 42, relief valve B40 was housed on connecting tube 44.Its objective is and allow unnecessary low-pressure water reflow tank 31 in the water pipe 42.
High pressure pump head body 1 is in the process of self intensification, this self intensification device is that power source is to the low voltage terminal supply pressure oil of high pressure turbocharger 25 by low voltage unit 13 with oil pump 17, and high voltage unit 14 is the low-pressure water that power source provides with water pump 33, and the high-pressure water that produces after high pressure turbocharger 25 superchargings enters high pressure pump head body 1 by water pipe 42.In the working procedure, when the indicated temperature of oil temperature gauge 28 is higher than the operating temperature of fluid, start cooler 27, the temperature of fluid is remained in the normal range of operation.
High pressure pump head body 1 by taper gland 7 and circular cone 11 respectively with the cooperating of end cap 2 and tap hole 3, inlet hole 4, through hole 5, make it after feeding highly pressurised liquid, can form self-tightening sealing, efficiently solve existing pump head body because the reasons in structure of through hole, the situation that highly pressurised liquid leaks takes place in the process of pump head body self intensification often, causes the pump head body self intensification not reach the problem of optimum efficiency.
High pressure pump head body 1 is in the process of self intensification, and the self intensification device is by regulating series flow control valve A21 and the three position four-way electromagnetic valve 20 of low voltage unit 13, can realize loading in the high pressure pump head body 1 self intensification pressure process and the process of pressurize.In this course, high pressure pump head body 1 can prevent the leakage of micro-gap between the conical surface by the seal ring 12 on taper gland 7 and the circular cone 11, to guarantee high pressure pump head body 1 stability of sealing under high pressure.The end cap 2 at high pressure pump head body 1 through hole 5 places can unload by the method that again adding man-hour employing destruction end cap 2 of high pressure pump head body 1 after self intensification because the screw thread conquassation can not be unloaded.The self intensification device can be realized the progressively pressure leak process of high pressure pump head body 1 by regulating series flow control valve B22, controlled Decompression valves 38 and two-position-five-way solenoid valve 39.The working procedure of this self intensification device is to press P in the limit of elasticity with high pressure pump head body 1
0Be initial from strengthen pressure, then according to this pressure P
05% amplification progressively increases, up to being loaded into maximum from strengthen pressure P
MAX, in the process of unloading, according to maximum from strengthen pressure P
MAX10%, both P
MAX5% the load width of cloth progressively unloads, until being unloaded to 0.Efficiently solve that existing pump head body self intensification device can not satisfy that pump head body is accurately regulated pressure, realized multistep loading step by step in the self intensification process, pressurize and the problem of offloading functions requirement progressively.Thereby make the self intensification device under the load history prerequisite that realizes pressurization, pressurize, pressurization and unloading, pressurize and unloading, make high pressure pump head body 1 reach the effect of predetermined elasto plastic deformation.And then improved the stress distribution situation of high pressure pump head body 1 inside, reach the purpose that improves high pressure pump head body 1 fatigue strength.
Claims (2)
1. the self intensification sealing configuration of a high pressure pump head body, comprise and be tap hole (3), inlet hole (4), through hole (5) and the plunger hole (6) that crosswise arranges in end cap (2), high pressure pump head body (1), the high pressure pump head body (1), it is characterized in that: plunger hole (6) internal thread of high pressure pump head body (1) is equipped with end cap (2), and taper gland (7) is installed in the cone-shaped inner hole of end cap (2); The tap hole (3) of described high pressure pump head body (1), inlet hole (4) and through hole (5) are respectively cone shape hole, be separately installed with circular cone (11) by fixed plate (9) and screw (10) in tap hole (3), inlet hole (4) and the through hole (5), be respectively arranged with seal groove on described taper gland (7) and the circular cone (11), seal ring (12) is installed in the seal groove; Described taper gland (7) is provided with highly pressurised liquid and enters hole (8).
2. self intensification device that is used for above-mentioned high pressure pump head body (1), it is made of low voltage unit (13) and high voltage unit (14), it is characterized in that: low voltage unit (13) is by fuel tank (15), fuel tank switch (16), oil pump (17), filter A(18), one-way valve (19), three position four-way electromagnetic valve (20), series flow control valve A(21), series flow control valve B(22), pressure gauge A(23), pressure gauge B(24), high pressure turbocharger (25), relief valve A(26), cooler (27) and oil temperature gauge (28) constitute, fuel supply line (29) and return tube (30) are installed on the fuel tank (15), fuel tank (15) is connected with high pressure turbocharger (25) by three position four-way electromagnetic valve (20) with return tube (30) by fuel supply line (29), is separately installed with series flow control valve A(21 on the fuel supply line (29) between three position four-way electromagnetic valve (20) and the high pressure turbocharger (25) and the return tube (30)), pressure gauge A(23) and series flow control valve B(22), pressure gauge B(24); Fuel tank switch (16), oil pump (17), filter A(18 are installed respectively on the fuel supply line (29) between fuel tank (15) and the three position four-way electromagnetic valve (20) and the return tube (30) successively), one-way valve (19) and cooler (27) and oil temperature gauge (28); Between fuel supply line (29) between fuel tank (15) and the three position four-way electromagnetic valve (20) and the return tube (30) by relief valve A(26) be communicated with;
High voltage unit (14) is by water tank (31), tank switch (32), water pump (33), filter B (34), high-pressure manometer (35), safety valve (36), pump head body fitting seat (37), controlled Decompression valves (38), two-position-five-way solenoid valve (39), relief valve B(40) and reduction valve (41) formation, water pipe (42) is housed on the water tank (31), and water tank (31) is communicated with pump head body fitting seat (37) by water pipe (42); Tank switch (32), water pump (33), filter B (34), high-pressure manometer (35) and safety valve (36) are installed on the water pipe (42) successively; On the water pipe (42) of high-pressure manometer (35) one sides return pipe (43) is housed, return pipe (43) is communicated with water tank (31), controlled Decompression valves (38) and reduction valve (41) are installed on the described return pipe (43) successively, two-position-five-way solenoid valve (39) is housed on the controlled Decompression valves (38), on the return pipe (43) between reduction valve (41) and the water tank (31) be housed the connecting tube (44) that is connected with water pipe (42), on connecting tube (44) relief valve B(40 be housed); Described low voltage unit (13) is communicated with the water pipe (42) of high voltage unit (14) by high pressure turbocharger (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310135428.2A CN103195699B (en) | 2013-04-18 | 2013-04-18 | A kind of pump head body self-reinforcing device that adopts self-reinforcing hermetically-sealed construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310135428.2A CN103195699B (en) | 2013-04-18 | 2013-04-18 | A kind of pump head body self-reinforcing device that adopts self-reinforcing hermetically-sealed construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195699A true CN103195699A (en) | 2013-07-10 |
| CN103195699B CN103195699B (en) | 2016-05-25 |
Family
ID=48718442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310135428.2A Expired - Fee Related CN103195699B (en) | 2013-04-18 | 2013-04-18 | A kind of pump head body self-reinforcing device that adopts self-reinforcing hermetically-sealed construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103195699B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711688A (en) * | 2014-01-16 | 2014-04-09 | 长江大学 | Self-tightening sealing and stress testing device for self-enhancing of ultrahigh-pressure pump head body |
| CN104405632A (en) * | 2014-10-17 | 2015-03-11 | 郭鑫 | Pump head of oil pump of lifting machine |
| CN104534091A (en) * | 2015-01-06 | 2015-04-22 | 长江大学 | Self-reinforced sealing structure of ultrahigh-pressure container |
| CN114837929A (en) * | 2022-04-21 | 2022-08-02 | 山东科瑞油气装备有限公司 | Pump head self-reinforcing device and matching process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002054531A (en) * | 2000-08-11 | 2002-02-20 | Bosch Automotive Systems Corp | Piston type high pressure pump |
| CN2625885Y (en) * | 2003-06-25 | 2004-07-14 | 遂宁川中油田机械有限公司 | Hydrostatic self-enhancing pressure testing device for fracturing pump valve box |
| CN201292942Y (en) * | 2008-11-07 | 2009-08-19 | 大港油田集团中成机械制造有限公司 | Disassemble packing kit for fracturing pump head |
| CN202001288U (en) * | 2010-07-04 | 2011-10-05 | 中国石油化工股份有限公司胜利油田分公司孤岛采油厂 | Novel valve for 3ZB70-670 type plunger pump |
| US20120152111A1 (en) * | 2010-12-16 | 2012-06-21 | S.P.M. Flow Control, Inc. | Plunger packing with wedge seal having extrusion recess |
| CN202814802U (en) * | 2012-08-20 | 2013-03-20 | 太原市华能沃德重型机械研究所有限公司 | Self-sealing pressurizing system of high-pressure water pressure test pipe machine |
| CN203201772U (en) * | 2013-04-18 | 2013-09-18 | 长江大学 | Self-enhancement sealing structure of pump head body and self-enhancement device for pump head body |
-
2013
- 2013-04-18 CN CN201310135428.2A patent/CN103195699B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002054531A (en) * | 2000-08-11 | 2002-02-20 | Bosch Automotive Systems Corp | Piston type high pressure pump |
| CN2625885Y (en) * | 2003-06-25 | 2004-07-14 | 遂宁川中油田机械有限公司 | Hydrostatic self-enhancing pressure testing device for fracturing pump valve box |
| CN201292942Y (en) * | 2008-11-07 | 2009-08-19 | 大港油田集团中成机械制造有限公司 | Disassemble packing kit for fracturing pump head |
| CN202001288U (en) * | 2010-07-04 | 2011-10-05 | 中国石油化工股份有限公司胜利油田分公司孤岛采油厂 | Novel valve for 3ZB70-670 type plunger pump |
| US20120152111A1 (en) * | 2010-12-16 | 2012-06-21 | S.P.M. Flow Control, Inc. | Plunger packing with wedge seal having extrusion recess |
| CN202814802U (en) * | 2012-08-20 | 2013-03-20 | 太原市华能沃德重型机械研究所有限公司 | Self-sealing pressurizing system of high-pressure water pressure test pipe machine |
| CN203201772U (en) * | 2013-04-18 | 2013-09-18 | 长江大学 | Self-enhancement sealing structure of pump head body and self-enhancement device for pump head body |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711688A (en) * | 2014-01-16 | 2014-04-09 | 长江大学 | Self-tightening sealing and stress testing device for self-enhancing of ultrahigh-pressure pump head body |
| CN103711688B (en) * | 2014-01-16 | 2015-09-09 | 长江大学 | The self-tightening sealing of a kind of ultrahigh pressure pump head body self intensification and stress test device |
| CN104405632A (en) * | 2014-10-17 | 2015-03-11 | 郭鑫 | Pump head of oil pump of lifting machine |
| CN104534091A (en) * | 2015-01-06 | 2015-04-22 | 长江大学 | Self-reinforced sealing structure of ultrahigh-pressure container |
| CN114837929A (en) * | 2022-04-21 | 2022-08-02 | 山东科瑞油气装备有限公司 | Pump head self-reinforcing device and matching process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103195699B (en) | 2016-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103195699B (en) | A kind of pump head body self-reinforcing device that adopts self-reinforcing hermetically-sealed construction | |
| US10370814B2 (en) | System for consolidating soft clay by combined anode boosting and electro-osmosis and method for consolidating soft clay | |
| CN203201772U (en) | Self-enhancement sealing structure of pump head body and self-enhancement device for pump head body | |
| CN213271164U (en) | Ultra-low temperature axial-flow type check valve sealing structure | |
| WO2013084533A1 (en) | Autofrettage machining device | |
| CN105466643A (en) | Sealing method of aviation casting machine box cavity pressure test | |
| CN202579158U (en) | Pressure-maintaining lead high-pressure pneumatic control unloading valve | |
| CN206930530U (en) | A kind of hydraulic pressure tester for pipe fitting height pressure control system | |
| CN216447209U (en) | Valve group device of ultrahigh pressure crimping machine | |
| CN204875943U (en) | High canned type overhead tank | |
| CN106232980A (en) | Petrolift | |
| CN209818415U (en) | Oil pressure setting device | |
| CN104879540A (en) | Pressure reducing valve with valve closing function | |
| CN204346820U (en) | A kind of hydraulic testing hydraulic floating end socket | |
| CN204420101U (en) | A kind of sealing configuration of ultrahigh pressure vessel self intensification | |
| CN204114259U (en) | There is the reduction valve of valve closing function | |
| CN109695754B (en) | Hydraulic oil inlet valve | |
| CN104534091A (en) | Self-reinforced sealing structure of ultrahigh-pressure container | |
| CN209818254U (en) | Auxiliary starting device for air compressor | |
| CN110748521B (en) | Controllable high-pressure oil way distribution module | |
| CN204153250U (en) | A kind of auto-compensation needle-valve | |
| CN202417922U (en) | Ultrahigh pressure oil pump | |
| CN205048069U (en) | Plug of coupling | |
| CN220452365U (en) | Pressure-keeping power device of pressurized working machine | |
| CN218376776U (en) | Vacuum pump vacuum centralized collection device for chemical industry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20180418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |