Inlet pressure balanced type boosting water injection pump
An imported pressure, balanced technology, used in pumps, piston pumps, liquid variable capacity machines, etc., can solve the problems of reducing the service life of the pump, breaking the plunger, and high oil temperature, so as to improve the stress condition and the average life. Improve and solve the effect of high oil temperature
Inactive Publication Date: 2011-06-01
四川杰特机器有限公司
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Problems solved by technology
Once the size of the plunger is determined, in actual use, if the inlet and outlet pressures of the pipeline are different from the design, the balance force on the plunger may be broken (this situation is often encountered in actual use) , causing the plunger to be reversed by the inlet pressure, causing the oil temperature at the power end of the pump to be too high, causing a "fever" phenomenon and reducing the service life of the pump
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[0021] The pump body 1 has a high-pressure chamber A, a working chamber B, a low-pressure balance chamber C and a low-pressure chamber D. The low-pressure chamber has a water inlet, and its water pressure is P1, and the high-pressure chamber has a water outlet, and its water pressure is P2. The working chamber B and the low-pressure balance chamber C are separated by a stepped plunger 13. The balance rod 14 of the stepped plunger is located in the working chamber B and has a packing seal 8. The plunger rod 6 of the stepped plunger is located in the low-pressure balance chamber C and has a packing seal 5 . The stroke part of the stepped plunger in the pump body has a cylinder liner 4, and the high-pressure chamber A has a water outlet valve seat 3 and a water outlet valve core 2. The low-pressure chamber D has a water inlet valve seat 12 and a water inlet valve core 11, and an inlet and outlet valve spring 10 is arranged on the inlet and outlet valve cores. The low-pressure c...
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The invention provides an inlet pressure balanced type boosting water injection pump, solving the problems of short service life, specific inlet and outlet pressure difference adaptability of the prior water injection pump. A high pressure cavity (A), a working cavity (B), a balanced cavity (C) and a low pressure cavity (D) are arranged in a pump body (1), wherein the low pressure cavity is provided with a water inlet; the high pressure cavity is provided with a water outlet; a connecting channel of the high pressure cavity and the working cavity is provided with an outlet valve seat (3) and an outlet valve core (2); a connecting channel of the low pressure cavity and the working cavity is provided with an inlet valve seat (12) and an inlet valve plug (11); the outlet valve plug and the inlet valve plug are respectively provided with a reset spring (10); the working cavity (B) is separated from a low pressure balanced cavity by a step plunger (13); and a plunger rod (6) is positioned in the balanced cavity (C), and is provided with a sealing pair (5). The pump is characterized in that the front end of the step plunger (13) is provided with a balanced rod (14) with the same diameter of the plunger (6); the balanced rod is provided with a sealing pair (8); and the balanced cavity (C) with a low pressure is communicated with the low pressure cavity (D) through a low pressure communicating pipe (9).
Description
Technical field: [0001] The invention relates to a pressurized reciprocating plunger water pump for water injection at the wellhead of an oil field. Background technique: [0002] The booster water injection pump is mainly used for oil wellhead water injection or various units that need booster to transport high-pressure liquid. The inlet medium of the pump has a certain working pressure. If an ordinary reciprocating pump is used as the power source, it needs to overcome the work done by the inlet pressure, that is, more power consumption. Therefore, it is necessary to design a special booster water injection pump to balance the "useless work" generated by the inlet pressure to achieve the purpose of energy saving. [0003] The high-pressure cylinder of the existing booster water injection pump is divided into four chambers, namely: A--high-pressure chamber, B--working chamber, C-high-pressure balance chamber and D--low-pressure chamber; the plunger adopts a special ladder ...
Claims
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IPC IPC(8): F04B9/02
Inventor 李文陈建邱富彬魏星吴家红
Owner 四川杰特机器有限公司