CN107061252B - Plunger jet pump and oil outlet valve - Google Patents
Plunger jet pump and oil outlet valve Download PDFInfo
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- CN107061252B CN107061252B CN201710276952.XA CN201710276952A CN107061252B CN 107061252 B CN107061252 B CN 107061252B CN 201710276952 A CN201710276952 A CN 201710276952A CN 107061252 B CN107061252 B CN 107061252B
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- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 230000006978 adaptation Effects 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000003129 oil well Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/124—Adaptation of jet-pump systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1072—Valves; Arrangement of valves the valve being an elastic body, the length thereof changing in the opening direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1087—Valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
本发明公开了柱塞射流泵及出油阀，包括接箍、双头螺纹接头、柱塞、泵筒和丝堵，其特征在于：柱塞的内腔底部与泵筒的内腔底部相连通，柱塞的上端通过双头螺纹接头与出油罩下端固定连接，出油罩的内腔底部与双头螺纹接头的内腔相连通，出油罩的上部侧壁上设有出油孔，出油罩的内腔上部与出油孔相连通，出油孔内设有出油阀，出油罩外壁和泵筒内壁之间的空腔与出油孔的出口相连通，泵筒的下部侧壁上设有进油孔，出油罩的上端与抽油杆的下端固定连接。本发明取消固定阀，采用出口高速射流，同时使用滑阀及弹性阀结构，漏失量降低，泵效得以提高，可不动管柱进行检泵及洗井等作业，有效降低了设备制造成本及油气田开采成本。
The invention discloses a plunger jet pump and an oil outlet valve, comprising a coupling, a double-ended threaded joint, a plunger, a pump barrel and a plug, and is characterized in that the bottom of the inner cavity of the plunger is communicated with the bottom of the inner cavity of the pump barrel The upper end of the plunger is fixedly connected with the lower end of the oil outlet cover through a double-ended threaded joint, the bottom of the inner cavity of the oil outlet cover is connected with the inner cavity of the double-ended threaded joint, and an oil outlet hole is arranged on the upper side wall of the oil outlet cover. The upper part of the inner cavity of the oil outlet cover is communicated with the oil outlet hole, an oil outlet valve is arranged in the oil outlet hole, the cavity between the outer wall of the oil outlet cover and the inner wall of the pump barrel is communicated with the outlet of the oil outlet hole, and the lower part of the pump barrel An oil inlet hole is arranged on the side wall, and the upper end of the oil outlet cover is fixedly connected with the lower end of the sucker rod. The invention cancels the fixed valve, adopts the high-speed jet at the outlet, and uses the sliding valve and the elastic valve structure at the same time, so that the leakage is reduced, the pump efficiency is improved, and the pipe string can be not moved to perform operations such as pump inspection and well flushing, which effectively reduces the equipment manufacturing cost and oil and gas field exploitation. cost.
Description
技术领域technical field
本发明涉及一种用于井液举升的柱塞抽油泵的改进，具体的说是一种柱塞射流泵及出油阀。The invention relates to an improvement of a plunger oil pump used for well fluid lifting, in particular to a plunger jet pump and an oil outlet valve.
背景技术Background technique
在油田开发过程中，射流泵因其具有抽吸广泛流体的能力，可适用于高温、高含水、高气油比的流体中，而得到应用，但是其工作过程中存在严重的喘流和摩擦，泵效低，喷嘴使用寿命短，地面需要大功率动力液供给系统，运行成本高，同时，由于地面采用高压力设备，存在一定的安全隐患。In the process of oilfield development, the jet pump has been used because of its ability to pump a wide range of fluids and can be applied to fluids with high temperature, high water content, and high gas-oil ratio, but there are serious surges and frictions during its work. , the pump efficiency is low, the service life of the nozzle is short, the ground needs a high-power power fluid supply system, and the operating cost is high. At the same time, due to the use of high-pressure equipment on the ground, there are certain safety hazards.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种结构简单，操作方便，通过油气田原有地面设备游梁式抽油机或液压抽油机实现驱动，提高地面设备安全性，整体结构无球阀，使出液口液流以射流状态排出，提高泵效，降低运行成本，延长运行周期的柱塞射流泵。The purpose of the present invention is to provide a simple structure and convenient operation, which can be driven by the beam pumping unit or hydraulic pumping unit of the original ground equipment in the oil and gas field, so as to improve the safety of the ground equipment. The flow is discharged in a jet state, which improves the pump efficiency, reduces the operating cost and prolongs the operating period of the plunger jet pump.
为达到以上目的，本发明采用的技术方案是：该柱塞射流泵，包括接箍、双头螺纹接头、柱塞、泵筒和丝堵，泵筒的上端通过接箍与油管下端固定连接，泵筒的下端固定设有丝堵，柱塞设置在泵筒的腔内，柱塞的外径与泵筒的内径相适配，其特征在于：柱塞的内腔底部与泵筒的内腔底部相连通，柱塞的上端通过双头螺纹接头与出油罩下端固定连接，出油罩的内腔底部与双头螺纹接头的内腔相连通，出油罩的上部侧壁上设有出油孔，出油罩的内腔上部与出油孔相连通，出油孔内设有出油阀，出油罩外壁和泵筒内壁之间的空腔与出油孔的出口相连通，泵筒的下部侧壁上设有进油孔，出油罩的上端与抽油杆的下端固定连接。In order to achieve the above purpose, the technical scheme adopted in the present invention is: the plunger jet pump includes a coupling, a double-ended threaded joint, a plunger, a pump barrel and a plug, and the upper end of the pump barrel is fixedly connected to the lower end of the oil pipe through the coupling, The lower end of the pump barrel is fixed with a screw plug, the plunger is arranged in the cavity of the pump barrel, and the outer diameter of the plunger is matched with the inner diameter of the pump barrel. The bottom is connected, the upper end of the plunger is fixedly connected with the lower end of the oil outlet cover through the double-ended threaded joint, the bottom of the inner cavity of the oil outlet cover is communicated with the inner cavity of the double-ended threaded joint, and the upper side wall of the oil outlet cover is provided with an outlet. The oil hole, the upper part of the inner cavity of the oil outlet cover is communicated with the oil outlet hole, the oil outlet hole is provided with an oil outlet valve, the cavity between the outer wall of the oil outlet cover and the inner wall of the pump barrel is communicated with the outlet of the oil outlet hole, the pump The lower side wall of the cylinder is provided with an oil inlet hole, and the upper end of the oil outlet cover is fixedly connected with the lower end of the sucker rod.
所述的出油罩的内腔，其下部为圆柱形空腔，上部为锥形空腔。In the inner cavity of the oil outlet cover, the lower part is a cylindrical cavity, and the upper part is a conical cavity.
所述的出油孔倾斜设置在出油罩的侧壁上，设有2—4个，沿出油罩的圆周均匀分布，出油孔的下端口与出油罩内腔的锥形空腔的上部相连通。The oil outlet holes are inclined on the side wall of the oil outlet cover, and there are 2-4, which are evenly distributed along the circumference of the oil outlet cover. The lower port of the oil outlet hole and the conical cavity of the inner cavity of the oil outlet cover connected to the top.
所述的出油阀，由阀座、流道和弹块构成，阀座的中部设有流道，阀座的上部固定设有2—4个沿圆周均匀分布设置的弹块，相邻弹块之间的间隙与流道的上部相连通。The oil outlet valve is composed of a valve seat, a flow channel and an elastic block. The middle of the valve seat is provided with a flow channel, and the upper part of the valve seat is fixed with 2-4 elastic blocks evenly distributed along the circumference. The gap between the blocks communicates with the upper part of the flow channel.
所述的流道呈锥体状。The flow channel is in the shape of a cone.
一种出油阀，其特征在于：它由阀座、流道和弹块构成，阀座的中部设有流道，阀座的上部固定设有2—4个沿圆周均匀分布设置的弹块，相邻弹块之间的间隙与流道的上部相连通。An oil outlet valve is characterized in that: it is composed of a valve seat, a flow channel and an elastic block, the middle part of the valve seat is provided with a flow channel, and the upper part of the valve seat is fixedly provided with 2-4 elastic blocks uniformly distributed along the circumference , the gap between adjacent elastic blocks is communicated with the upper part of the flow channel.
本发明的有益效果在于：与射流泵相比，地面设备采用油气田原有游梁式抽油机或液压抽油机，取消了地面大功率高压设备，地面更加安全与节能，取消固定阀，采用出口高速射流，同时使用滑阀及弹性阀结构，漏失量降低，泵效得以提高，且增强了对砂、气等复杂井况的适应性，延长检泵周期，可不动管柱进行检泵及洗井等作业，有效降低了设备制造成本及油气田开采成本，提高了经济效益。The beneficial effects of the invention are: compared with the jet pump, the ground equipment adopts the original beam pumping unit or hydraulic pumping unit of the oil and gas field, cancels the ground high-power high-pressure equipment, the ground is safer and energy-saving, cancels the fixed valve, adopts The high-speed jet at the outlet and the structure of the slide valve and the elastic valve are used at the same time, the leakage is reduced, the pump efficiency is improved, and the adaptability to complex well conditions such as sand and gas is enhanced, and the pump inspection period is prolonged. Wells and other operations effectively reduce equipment manufacturing costs and oil and gas field exploitation costs, and improve economic benefits.
附图说明Description of drawings
图1为本发明的结构剖视示意图。FIG. 1 is a schematic cross-sectional view of the structure of the present invention.
图2为本发明的出油阀的闭合状态结构剖视放大示意图。FIG. 2 is an enlarged schematic sectional view of the closed state structure of the oil outlet valve of the present invention.
图3为本发明的出油阀的打开状态结构剖视放大示意图。FIG. 3 is an enlarged schematic cross-sectional view of the oil outlet valve of the present invention in an open state.
图4为本发明的出油阀俯视放大示意图。FIG. 4 is an enlarged schematic top view of the oil outlet valve of the present invention.
图5为本发明的出油罩的结构剖视放大示意图。FIG. 5 is an enlarged schematic sectional view of the structure of the oil outlet cover of the present invention.
图中1、接箍；2、双头螺纹接头；3、柱塞；4、泵筒；5、丝堵；6出油阀；61、阀座；62、流道；63、弹块；7、出油罩；71、圆柱形空腔；72、锥形空腔；8、油管；9、抽油杆；10、出油孔；11、进油孔。In the figure, 1. Coupling; 2. Double-ended threaded joint; 3. Plunger; 4. Pump barrel; 5. Screw plug; 6. Oil outlet valve; 61. Valve seat; , oil outlet cover; 71, cylindrical cavity; 72, conical cavity; 8, oil pipe; 9, sucker rod; 10, oil outlet; 11, oil inlet.
具体实施方式Detailed ways
参照图1、图2、图3、图4、图5制作本发明。该柱塞射流泵，包括接箍1、双头螺纹接头2、柱塞3、泵筒4和丝堵5，泵筒4的上端通过接箍1与油管8下端固定连接，泵筒4的下端固定设有丝堵5，柱塞3设置在泵筒4的腔内，柱塞3的外径与泵筒4的内径相适配，其特征在于：柱塞3的内腔底部与泵筒4的内腔底部相连通，柱塞3的上端通过双头螺纹接头2与出油罩7下端固定连接，出油罩7的内腔底部与双头螺纹接头2的内腔相连通，出油罩7的上部侧壁上设有出油孔10，出油罩7的内腔上部与出油孔10相连通，出油孔10内设有出油阀6，出油罩7外壁和泵筒4内壁之间的空腔与出油孔10的出口相连通，泵筒4的下部侧壁上设有进油孔11，出油罩7的上端与抽油杆9的下端固定连接。The present invention is fabricated with reference to FIGS. 1 , 2 , 3 , 4 and 5 . The plunger jet pump includes a coupling 1, a double-ended threaded joint 2, a plunger 3, a pump barrel 4 and a plug 5. The upper end of the pump barrel 4 is fixedly connected to the lower end of the oil pipe 8 through the coupling 1, and the lower end of the pump barrel 4 A screw plug 5 is fixed, the plunger 3 is arranged in the cavity of the pump barrel 4, and the outer diameter of the plunger 3 is matched with the inner diameter of the pump barrel 4. The upper end of the plunger 3 is fixedly connected with the lower end of the oil outlet cover 7 through the double-ended threaded joint 2, and the bottom of the inner cavity of the oil outlet cover 7 is communicated with the inner cavity of the double-ended threaded joint 2, and the oil outlet cover 7 is provided with an oil outlet hole 10 on the upper side wall of the oil outlet cover 7, and the upper part of the inner cavity of the oil outlet cover 7 is communicated with the oil outlet hole 10. The oil outlet hole 10 is provided with an oil outlet valve 6, the outer wall of the oil outlet cover 7 and the pump barrel 4 The cavity between the inner walls communicates with the outlet of the oil outlet hole 10 , the lower side wall of the pump cylinder 4 is provided with an oil inlet hole 11 , and the upper end of the oil outlet cover 7 is fixedly connected with the lower end of the sucker rod 9 .
所述的出油罩7的内腔，其下部为圆柱形空腔71，上部为锥形空腔72。In the inner cavity of the oil outlet cover 7, the lower part is a cylindrical cavity 71, and the upper part is a conical cavity 72.
所述的出油孔10倾斜设置在出油罩7的侧壁上，设有2—4个，沿出油罩7的圆周均匀分布，出油孔10的下端口与出油罩7内腔的锥形空腔72的上部相连通。The oil outlet hole 10 is inclined and arranged on the side wall of the oil outlet cover 7, and there are 2-4, which are evenly distributed along the circumference of the oil outlet cover 7. The lower port of the oil outlet hole 10 is connected to the inner cavity of the oil outlet cover 7. The upper part of the conical cavity 72 communicates with each other.
所述的出油阀6，由阀座61、流道62和弹块63构成，阀座61的中部设有流道62，阀座61的上部固定设有2—4个沿圆周均匀分布设置的弹块63，流道62的上部与相邻弹块63之间的间隙相连通，在不出液时，各个弹块63闭合在一起，在出液时，各个弹块63向外张开，相邻弹块6之间的间隙张开与流道62相通。所述的弹块63由具有弹性的材料制成，与阀座61制成一体。The oil outlet valve 6 is composed of a valve seat 61, a flow channel 62 and an elastic block 63. The middle part of the valve seat 61 is provided with a flow channel 62, and the upper part of the valve seat 61 is fixedly provided with 2-4 evenly distributed along the circumference. The upper part of the flow channel 62 is connected with the gap between the adjacent elastic blocks 63. When the liquid is not discharged, the elastic blocks 63 are closed together, and when the liquid is discharged, the elastic blocks 63 are opened outward. , the gap between the adjacent elastic blocks 6 is opened and communicated with the flow channel 62 . The elastic block 63 is made of an elastic material and is integrally formed with the valve seat 61 .
所述的流道62呈锥体状。The flow channel 62 is in the shape of a cone.
使用本发明进行油井作业时，地面抽油机或其他动力设备提供动力。带动抽油杆9上下运动。柱塞3的下端位于泵筒4侧壁进油孔11上方，出油罩7的出油孔10内的出油阀6处于闭合状态，泵筒4内腔底部通过进油孔11与油井相连通，油液通过进油孔11进入泵筒4内腔。下冲程时，抽油杆9带动出油罩7和柱塞3下行，柱塞3下端会封闭进油孔11，泵筒4的内腔、柱塞3的内腔和双头螺纹接头2的内腔就形成一个封闭的盛满油液的空腔，随着柱塞3的下行，出油阀6在底部压力的作用下打开，泵筒4的内腔、柱塞3的内腔和双头螺纹接头2的内腔所形成的空腔内的油液会通过出油罩7上的出油孔10流入泵筒4内壁和出油罩7外壁之间的空腔，再向上流入油管8内，从而举升到地面。When using the present invention for oil well operations, the surface pumping unit or other power equipment provides power. Drive the sucker rod 9 to move up and down. The lower end of the plunger 3 is located above the oil inlet hole 11 on the side wall of the pump barrel 4, the oil outlet valve 6 in the oil outlet hole 10 of the oil outlet cover 7 is in a closed state, and the bottom of the inner cavity of the pump barrel 4 is connected to the oil well through the oil inlet hole 11. The oil enters the inner cavity of the pump barrel 4 through the oil inlet hole 11. During the downstroke, the sucker rod 9 drives the oil outlet cover 7 and the plunger 3 downward, the lower end of the plunger 3 will close the oil inlet hole 11, the inner cavity of the pump barrel 4, the inner cavity of the plunger 3 and the double-ended threaded joint 2. The inner cavity forms a closed cavity filled with oil. With the downward movement of the plunger 3, the oil outlet valve 6 is opened under the action of the bottom pressure, and the inner cavity of the pump barrel 4, the inner cavity of the plunger 3 and the double valve are opened. The oil in the cavity formed by the inner cavity of the head threaded joint 2 will flow into the cavity between the inner wall of the pump barrel 4 and the outer wall of the oil outlet cover 7 through the oil outlet hole 10 on the oil outlet cover 7, and then flow upward into the oil pipe 8 inside, so as to lift to the ground.
上冲程时，抽油杆9提升柱塞3，出油阀6在油管内部压力作用下封闭，从而封闭出油孔10，泵筒4的内腔、柱塞3的内腔和双头螺纹接头2的内腔所形成的空腔内产生负压，当柱塞3的下端位于进油孔11上方后，油井内的油液便从进油孔11内进入泵筒4腔内，如此往复循环，达到抽油的目的。During the upward stroke, the sucker rod 9 lifts the plunger 3, and the oil outlet valve 6 is closed under the action of the internal pressure of the oil pipe, thereby closing the oil outlet hole 10, the inner cavity of the pump barrel 4, the inner cavity of the plunger 3 and the double-ended threaded joint. Negative pressure is generated in the cavity formed by the inner cavity of 2. When the lower end of the plunger 3 is located above the oil inlet hole 11, the oil in the oil well enters the cavity of the pump barrel 4 from the oil inlet hole 11, and so on and so forth. , to achieve the purpose of pumping oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710276952.XA CN107061252B (en) | 2017-04-25 | 2017-04-25 | Plunger jet pump and oil outlet valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710276952.XA CN107061252B (en) | 2017-04-25 | 2017-04-25 | Plunger jet pump and oil outlet valve |
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| CN107061252A CN107061252A (en) | 2017-08-18 |
| CN107061252B true CN107061252B (en) | 2019-12-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116163686B (en) * | 2021-11-25 | 2025-02-11 | 中国石油天然气股份有限公司 | Pressurized lifting column |
| CN114738249B (en) * | 2022-04-29 | 2025-07-04 | 嘉善万顺达电子有限公司 | Water pump for water flosser |
| CN116591645B (en) * | 2023-06-13 | 2025-07-18 | 郑州亿丰无杆泵业有限公司 | A kind of automatic reversing rodless pump for underground well |
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| CN2276069Y (en) * | 1996-09-24 | 1998-03-11 | 胜利石油管理局采油工艺研究院 | Sand washing valve |
| CN2399528Y (en) * | 1999-08-11 | 2000-10-04 | 彭守斌 | Large displacement rod type, tube type pump |
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| DE102008033262A1 (en) * | 2008-07-15 | 2010-01-21 | Thomas Magnete Gmbh | Sealing element i.e. check valve needle, for opening and closing e.g. suction valve in feed pump, has valve seat for limiting hole, and two catch regions contacting with valve seat to close valve |
| CN201554704U (en) * | 2009-11-25 | 2010-08-18 | 大港油田集团有限责任公司 | Jet pump |
| CN103867429A (en) * | 2012-12-07 | 2014-06-18 | 胡军 | Novel valve body and piezoelectric pump with same |
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|---|---|---|---|---|
| CN2276069Y (en) * | 1996-09-24 | 1998-03-11 | 胜利石油管理局采油工艺研究院 | Sand washing valve |
| CN2399528Y (en) * | 1999-08-11 | 2000-10-04 | 彭守斌 | Large displacement rod type, tube type pump |
| DE10019403A1 (en) * | 2000-04-19 | 2001-10-25 | Bosch Gmbh Robert | Check valve for piston pump has holding component for valve shut-off element and is movably connected to it and formed in one piece with it |
| DE102008033262A1 (en) * | 2008-07-15 | 2010-01-21 | Thomas Magnete Gmbh | Sealing element i.e. check valve needle, for opening and closing e.g. suction valve in feed pump, has valve seat for limiting hole, and two catch regions contacting with valve seat to close valve |
| CN201554704U (en) * | 2009-11-25 | 2010-08-18 | 大港油田集团有限责任公司 | Jet pump |
| CN103867429A (en) * | 2012-12-07 | 2014-06-18 | 胡军 | Novel valve body and piezoelectric pump with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107061252A (en) | 2017-08-18 |
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Denomination of invention: Plunger jet pump and outlet valve Effective date of registration: 20221024 Granted publication date: 20191231 Pledgee: Laiwu branch of China Postal Savings Bank Co.,Ltd. Pledgor: SHANDONG WEIMA PUMPS MANUFACTURING Co.,Ltd. Registration number: Y2022980019328 |
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Denomination of invention: Piston jet pump and oil outlet valve Granted publication date: 20191231 Pledgee: Laiwu branch of China Postal Savings Bank Co.,Ltd. Pledgor: SHANDONG WEIMA PUMPS MANUFACTURING Co.,Ltd. Registration number: Y2024980057168 |