WO2024045690A1 - 一种活接式双柱塞泵 - Google Patents

一种活接式双柱塞泵 Download PDF

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Publication number
WO2024045690A1
WO2024045690A1 PCT/CN2023/093797 CN2023093797W WO2024045690A1 WO 2024045690 A1 WO2024045690 A1 WO 2024045690A1 CN 2023093797 W CN2023093797 W CN 2023093797W WO 2024045690 A1 WO2024045690 A1 WO 2024045690A1
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Prior art keywords
plunger
connecting piece
movable joint
movable
pump according
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PCT/CN2023/093797
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English (en)
French (fr)
Inventor
邹淑君
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邹淑君
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Publication of WO2024045690A1 publication Critical patent/WO2024045690A1/zh

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Classifications

    • 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
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly

Definitions

  • the utility model relates to the field of oil field oil production, specifically a union type double plunger pump.
  • Piston pumps are relatively common oil production equipment in oil fields.
  • the currently commonly used double plunger pumps have too long plungers, difficult processing, high processing costs, and low assembly accuracy, which can easily lead to eccentric wear of the plungers, greatly shortening the length of the plunger pump. service life.
  • the utility model provides a free-joint double-piston pump.
  • the free-joint double-piston pump By connecting the double plungers through a movable joint, the upper plunger can cooperate with the upper pump barrel independently, and the lower plunger can cooperate with the lower pump barrel independently. This solves the problem that the double plunger and the upper and lower pump barrels require relatively high coaxiality and straightness. This reduces the difficulty and cost of processing, improves assembly accuracy, and extends the service life of the plunger pump.
  • a movable double plunger pump including an upper plunger and a lower plunger.
  • the upper end of the lower plunger is connected to the upper end of the lower plunger.
  • the upper plunger and the upper end of the lower plunger are connected to the upper end of the lower plunger. are connected through movable joints.
  • the movable joint includes an upper connecting piece and a lower connecting piece.
  • the upper connecting piece is in an inverted T shape, and its upper end is connected to the upper plunger.
  • the lower connecting piece is T shaped, and its lower end is connected to the upper end of the lower plunger.
  • An outer cylinder is provided outside the upper connecting piece and the lower connecting piece, and there are radial and axial gaps between the upper connecting piece, the lower connecting piece and the outer cylinder.
  • Both the upper connecting piece and the lower connecting piece are provided with vertical liquid holes inside.
  • the movable joint includes an upper plunger connecting barrel and a lower plunger connecting piece.
  • the upper plunger connecting barrel is connected to the bottom of the upper plunger.
  • the lower plunger connecting piece is T-shaped, and the upper part of the T shape is located in the upper plunger connecting barrel. , the lower end is connected to the upper end of the lower plunger; there is a radial and axial gap between the lower plunger connecting piece and the upper plunger connecting barrel.
  • the upper plunger connecting barrel and the lower plunger connecting piece are both provided with vertical liquid holes inside.
  • the movable joint includes an I-shaped connector.
  • the upper flat plate of the I-shaped connector is located inside the upper plunger.
  • the lower flat plate is located inside the upper end of the lower plunger.
  • the bottom surface of the upper flat plate is connected to the upper end of the lower plunger.
  • a vertical liquid hole is provided inside the I-shaped connector.
  • the movable joint includes an upper baffle and a connecting rod.
  • the upper baffle is located inside the upper plunger.
  • the lower end of the connecting rod is fixed on the upper end of the lower plunger.
  • the length of the connecting rod is greater than the thickness of the bottom surface of the upper plunger, and the connecting rod There is a radial gap between the upper plunger and the upper plunger.
  • the utility model has the following beneficial effects: due to the above solution, the double plunger pump connects the upper plunger and the lower plunger with a movable joint, which solves the problems of high processing difficulty and high processing cost of the original double plunger. Improve the processing accuracy and assembly accuracy. At the same time, during oil production, the upper and lower plungers can automatically adjust the operating deflection angle, greatly reducing The probability of eccentric wear occurs and extends the service life of the plunger pump.
  • Figure 1 is a schematic structural diagram of the utility model
  • Figure 2 is a schematic diagram of the movable joint in Embodiment 1;
  • Figure 3 is a schematic diagram of the movable joint in the second embodiment
  • Figure 4 is a schematic diagram of the movable joint in the third embodiment
  • FIG. 5 is a schematic diagram of the movable joint shown in FIG. 1 .
  • a movable double plunger pump includes an upper pump barrel 2, a lower pump barrel 10, an upper plunger 4, and a lower plunger 9.
  • the upper end of the upper pump barrel 2 is connected to the upper pipe string through a coupling 1.
  • the upper pump barrel 2 and the lower pump barrel 10 are connected through threads.
  • the upper and lower ends of the upper plunger 4 are respectively provided with the upper plunger upper liquid hole 3 and the upper plunger lower liquid hole 6.
  • the upper plunger 4 is provided with an upper valve 5 inside.
  • the upper part of the lower plunger 9 is connected to the upper end 12 of the lower plunger, and the upper part of the upper end 12 of the lower plunger is provided with a lower plunger liquid hole 11 .
  • the upper plunger 4 and the upper end 12 of the lower plunger are connected through a movable joint 7.
  • the movable joint 7 allows a radial and axial movement margin between the upper and lower plungers.
  • the movable joint 7 includes an upper baffle 77 and a connecting rod 78.
  • the upper baffle 77 is located inside the upper plunger 4.
  • the lower end of the connecting rod 78 It is fixed on the upper part of the upper end 12 of the lower plunger.
  • the movable joint 7 changes the original hard connection between the two plungers into a soft connection, which solves the problems of high processing difficulty and high processing cost caused by the hard connection, improves the processing accuracy, and at the same time, when extracting oil, the upper and lower plungers can Automatically adjust the operating angle, greatly reducing the chance of eccentric wear and extending the service life of the plunger pump.
  • the movable joint 7 includes an upper connecting piece 71 and a lower connecting piece 73.
  • the upper connecting piece 71 is in an inverted T shape, and its upper end is connected to the upper plunger 4.
  • the lower connecting piece 73 is The lower end of the upright T-shape is connected with the upper end 12 of the lower plunger.
  • the upper connecting piece 71 and the lower connecting piece 73 are provided with an outer cylinder 72 on the outside, and the upper end of the upper connecting piece 71 and the lower end of the lower connecting piece 73 extend out of the outer cylinder 72 respectively.
  • the movable joint 7 includes an upper plunger connecting barrel 74 and a lower plunger connecting piece 75.
  • the upper plunger connecting barrel 74 is connected to the bottom of the upper plunger 4, and the lower plunger connecting piece 75 It is T-shaped, the upper part of the T-shape is located in the upper plunger connecting barrel 74, and the lower end passes through the upper plunger connecting barrel 74 and is connected to the upper end 12 of the lower plunger.
  • the internal height of the upper plunger connecting barrel 74 Greater than the thickness of the transverse plate of the lower plunger connecting piece 75, there is an axial gap between the lower plunger connecting piece 75 and the upper plunger connecting barrel 74, and there is an axial gap between the lower plunger connecting piece 75 and the upper plunger connecting barrel 74. There are also gaps in the radial direction. This allows a moving gap between the upper and lower plungers.
  • the upper plunger connecting barrel 74 and the lower plunger connecting piece 75 are both provided with vertical liquid holes inside, and the side wall of the upper plunger connecting barrel 74 may also be provided with liquid holes.
  • the movable joint 7 includes an I-shaped connector 76.
  • the upper flat plate of the I-shaped connector 76 is located inside the upper plunger 4, and the lower flat plate is located inside the upper end 12 of the lower plunger.
  • the upper flat plate and the lower There are connecting rods between the plates.
  • the height of the connecting rod is greater than the sum of the thicknesses of the upper ends of the upper plunger and the lower plunger, so that there is an axial gap between the upper and lower plungers.
  • the outer wall of the upper flat plate and the inner wall of the upper plunger, and the outer wall of the lower flat plate and the lower There is a radial gap between the inner walls of the upper end of the plunger.
  • the I-shaped connector 76 is provided with a vertical liquid hole inside.

Abstract

一种活接式双柱塞泵，包括上柱塞（4）、下柱塞（9），下柱塞（9）上端连接有下柱塞上端头（12），上柱塞（4）和下柱塞上端头（12）之间通过活动接头（7）相连。这种活接式双柱塞泵将双柱塞通过活动接头进行连接，解决了现有双柱塞泵由于双柱塞之间因硬连接造成的部件尺寸过长不易加工、易导致柱塞偏磨的问题，降低了加工难度及成本，提高装配精度，延长了柱塞泵的使用寿命。

Description

一种活接式双柱塞泵 技术领域
本实用新型涉及油田采油领域，具体说是一种活接式双柱塞泵。
背景技术
油田上柱塞泵是比较常见的采油设备，目前常用的双柱塞泵由于柱塞过长，加工难度大，加工成本高，装配精度低，易导致柱塞偏磨，大大缩短了柱塞泵的使用寿命。
发明内容
为了克服现有的双柱塞泵由于双柱塞尺寸过长不易加工、易导致柱塞偏磨的不足，本实用新型提供一种活接式双柱塞泵，该活接式双柱塞泵将双柱塞之间通过活动接头连接，可以使上柱塞与上泵筒单独配合、下柱塞与下泵筒单独配合，解决了双柱塞和上下泵筒需要同轴度和直线度较高的问题，从而降低了加工难度及加工成本，提高装配精度，延长了柱塞泵的使用寿命。
本实用新型的技术方案是：一种活接式双柱塞泵，包括上柱塞、下柱塞，下柱塞上端连接有下柱塞上端头，所述上柱塞和下柱塞上端头之间通过活动接头相连。
所述活动接头包括上连接件和下连接件，所述上连接件为倒置的T形，其上端与上柱塞相连，下连接件为T形，其下端与下柱塞上端头相连，且上连接件和下连接件外部设有外筒，所述上连接件和下连接件与外筒之间径向和轴向均有间隙。
所述上连接件和下连接件内部均设有竖直方向的过液孔。
所述外筒侧壁上开有过液孔。
所述活动接头包括上柱塞连接筒、下柱塞连接件，所述上柱塞连接筒连接在上柱塞底部，下柱塞连接件为T形，T形上部位于上柱塞连接筒内，下端连接在下柱塞上端头上；所述下柱塞连接件与上柱塞连接筒之间径向和轴向均有间隙。
所述上柱塞连接筒和下柱塞连接件内部均设有竖直方向的过液孔。
所述上柱塞连接筒侧壁上开有过液孔。
所述活动接头包括工字形连接件，工字形连接件的上平板位于上柱塞内部，下平板位于下柱塞上端头内部，上平板与下平板之间为连接杆，所述上平板底面与上柱塞之间、下平板顶面与下柱塞上端头之间均有间隙，且连接杆与上柱塞、下柱塞上端头之间径向有间隙。
所述工字形连接件内部设有竖直方向的过液孔。
所述活动接头包括上挡片和连接杆，所述上挡片位于上柱塞内部，连接杆下端固定在下柱塞上端头上，所述连接杆的长度大于上柱塞底面厚度，且连接杆与上柱塞之间径向有间隙。
本实用新型具有如下有益效果：由于采取上述方案，该双柱塞泵将上柱塞和下柱塞之间由活动接头连接，解决了原有双柱塞加工难度大及加工成本高的问题，提高加工精度及装配精度，同时在采油生产时，上下柱塞柱塞可以进行自动调整运行偏角，大大减少了 发生偏磨的机率，延长柱塞泵的使用寿命。
附图说明
图1是本实用新型的结构示意图；
图2是实施例一中活动接头的示意图；
图3是实施例二中活动接头的示意图；
图4是实施例三中活动接头的示意图；
图5是图1是活动接头的示意图。
图中1-接箍，2-上泵筒，3-上柱塞上过液孔，4-上柱塞，5-上凡尔，6-上柱塞下过液孔，7-活动接头，8-下凡尔，9-下柱塞，10-下泵筒，11-下柱塞过液孔，12-下柱塞上端头，71-上连接件，72-外筒，73-下连接件，74-上柱塞连接筒，75-下柱塞连接件，76-工字形连接件，77-上挡片，78-连接杆。
具体实施方式
下面结合附图对本实用新型作进一步说明：
由图1所示，一种活接式双柱塞泵，包括上泵筒2、下泵筒10、上柱塞4、下柱塞9，上泵筒2上端通过接箍1连接上部管柱，上泵筒2与下泵筒10之间通过螺纹连接。所述上柱塞4上下两端分别设有上柱塞上过液孔3、上柱塞下过液孔6，上柱塞4内部设有上凡尔5。所述下柱塞9上部连接下柱塞上端头12，下柱塞上端头12上部开有下柱塞过液孔11。所述上柱塞4和下柱塞上端头12之间通过活动接头7相连，活动接头7使得上、下柱塞之间径向及轴向均有活动余量。如图5，活动接头7包括上挡片77和连接杆78，所述上挡片77位于上柱塞4内部，上挡片77与上柱塞4之间径向有间隙，连接杆78下端固定在下柱塞上端头12上部。所述连接杆78与上柱塞4的孔壁之间径向有间隙，且连接杆78的长度大于上柱塞4底面的壁厚，使得活动接头7与上柱塞4之间轴向、径向均有活动间隙，从而使下柱塞9与上柱塞4之间轴向、径向有活动间隙，避免柱塞发生偏磨。
所述活动接头7将原有的双柱塞之间硬连接改为软连接，解决了硬连接造成的加工难度大及加工成本高的问题，提高加工精度，同时在采油时，上下柱塞可以进行自动调整运行角度，大大减少了发生偏磨的机率，延长柱塞泵的使用寿命。
实施例一：如图2，所述活动接头7包括上连接件71和下连接件73，所述上连接件71为倒置的T形，其上端与上柱塞4相连，下连接件73为正放的T形，其下端与下柱塞上端头12相连。所述上连接件71和下连接件73外部设有外筒72，且上连接件71上端及下连接件73下端分别伸出外筒72。所述上连接件71和下连接件73与外筒72之间径向和轴向均有间隙，这使得上、下连接件之间轴向可以活动，且上、下连接件与外筒72之间径向也可以活动，从而使上、下柱塞之间有活动间隙，这样在采油时，柱塞可以自动调节，避免发生偏磨。为使采油时过液更顺畅，作为优选，上连接件71和下连接件73内部均可以设有竖直方向的过液孔，同时，外筒72侧壁上也可以开有过液孔。
实施例二：如图3，所述活动接头7包括上柱塞连接筒74、下柱塞连接件75，所述上柱塞连接筒74连接在上柱塞4底部，下柱塞连接件75为T形，T形上部位于上柱塞连接筒74内，下端穿过上柱塞连接筒74后连接在下柱塞上端头12上。所述上柱塞连接筒74内部高度 大于下柱塞连接件75的横板厚度，从而使下柱塞连接件75与上柱塞连接筒74之间轴向有间隙，并且下柱塞连接件75与上柱塞连接筒74之间径向也有间隙。这样使得上、下柱塞之间有活动间隙。同样，作为优选，所述上柱塞连接筒74和下柱塞连接件75内部均设有竖直方向的过液孔，上柱塞连接筒74侧壁上也可以开有过液孔。
实施例三：如图4，所述活动接头7包括工字形连接件76，工字形连接件76的上平板位于上柱塞4内部，下平板位于下柱塞上端头12内部，上平板与下平板之间为连接杆。所述连接杆的高度大于上柱塞、下柱塞上端头的厚度之和，从而使上、下柱塞之间有轴向间隙，同时上平板外壁与上柱塞内壁、下平板外壁与下柱塞上端头内壁之间有径向间隙。所述连接杆与上柱塞4、下柱塞上端头12的孔壁之间径向有间隙。作为优选，所述工字形连接件76内部设有竖直方向的过液孔。
最后需要指出的是：以上所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型所述技术方案或技术特征的任何修改和替换，对本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的精神和范围之内。

Claims (10)

  1. 一种活接式双柱塞泵，包括上柱塞(4)、下柱塞(9)，下柱塞(9)上端连接有下柱塞上端头(12)，其特征在于：所述上柱塞(4)和下柱塞上端头(12)之间通过活动接头(7)相连。
  2. 根据权利要求1所述的活接式双柱塞泵，其特征在于：所述活动接头(7)包括上连接件(71)和下连接件(73)，所述上连接件(71)为倒置的T形，其上端与上柱塞(4)相连，下连接件(73)为T形，其下端与下柱塞上端头(12)相连，且上连接件(71)和下连接件(73)外部设有外筒(72)，所述上连接件(71)和下连接件(73)与外筒(72)之间径向和轴向均有间隙。
  3. 根据权利要求2所述的活接式双柱塞泵，其特征在于：所述上连接件(71)和下连接件(73)内部均设有竖直方向的过液孔。
  4. 根据权利要求3所述的活接式双柱塞泵，其特征在于：所述外筒(72)侧壁上开有过液孔。
  5. 根据权利要求1所述的活接式双柱塞泵，其特征在于：所述活动接头(7)包括上柱塞连接筒(74)、下柱塞连接件(75)，所述上柱塞连接筒(74)连接在上柱塞(4)底部，下柱塞连接件(75)为T形，T形上部位于上柱塞连接筒(74)内，下端连接在下柱塞上端头(12)上；所述下柱塞连接件(75)与上柱塞连接筒(74)之间径向和轴向均有间隙。
  6. 根据权利要求5所述的活接式双柱塞泵，其特征在于：所述上柱塞连接筒(74)和下柱塞连接件(75)内部均设有竖直方向的过液孔。
  7. 根据权利要求6所述的活接式双柱塞泵，其特征在于：所述上柱塞连接筒(74)侧壁上开有过液孔。
  8. 根据权利要求1所述的活接式双柱塞泵，其特征在于：所述活动接头(7)包括工字形连接件(76)，工字形连接件(76)的上平板位于上柱塞(4)内部，下平板位于下柱塞上端头(12)内部，上平板与下平板之间为连接杆，所述上平板底面与上柱塞(4)之间、下平板顶面与下柱塞上端头(12)之间均有间隙，且连接杆与上柱塞(4)、下柱塞上端头(12)之间径向有间隙。
  9. 根据权利要求8所述的活接式双柱塞泵，其特征在于：所述工字形连接件(76)内部设有竖直方向的过液孔。
  10. 根据权利要求1所述的活接式双柱塞泵，其特征在于：所述活动接头(7)包括上挡片(77)和连接杆(78)，所述上挡片(77)位于上柱塞(4)内部，连接杆(78)下端固定在下柱塞上端头(12)上，所述连接杆(78)的长度大于上柱塞(4)底面厚度，且连接杆与上柱塞(4)之间径向有间隙。
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