Drilling pump piston rod and intermediate draw bar assembly interference eliminating device
An intermediate tie rod and piston rod technology, which is applied to the components of the pumping device for elastic fluid, pump components, variable displacement pump components, etc. Even wear, the effect of solving the problem of forced assembly
Inactive Publication Date: 2021-01-22
中油国家油气钻井装备工程技术研究中心有限公司 +2
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] The object of the present invention is to provide a device for eliminating interference between the piston rod and the middle tie rod of the drilling pump. Through the free rotation of the two eccentric discs, the piston rod can be connected and installed at any position within 2r from the axis of the middle tie rod, which solves the problem of the middle tie rod. The problem of eccentric wear of the piston cylinder liner and the forced assembly of the piston rod caused by the different axis of the piston rod
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[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] According to the present invention, the piston rod of the drilling pump and the intermediate tie rod are assembled with the interference elimination device, and the structure is as follows: figure 2 As shown, it includes an intermediate tie rod 2, an eccentric disk I8 is installed at one end of the intermediate tie rod 2, an eccentric disk II9 is matched in the eccentric disk I8, and a piston rod 5 is connected in the eccentric disk II9, as shown in the figure. Figure 4 As shown, a clamp 3 is also included, and the clamp 3 connects the piston rod 5 and the intermediate pull rod 2 together.
[0028] like image 3 As shown, one end of the intermediate tie rod 2 is provided with a blind hole 17 with a diameter of D1, and the eccentric disc I8 is installed in the blind hole 17 of the intermediate tie rod 2 through the connecting screw 7...
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The invention discloses a drilling pump piston rod and intermediate draw bar assembly interference eliminating device. The device comprises an intermediate draw bar, an eccentric disc I is installed at one end of the intermediate draw bar, an eccentric disc II is connected into the eccentric disc I in a matched mode, a piston rod is connected into the eccentric disc II, and the ends, close to eachother, of the piston rod and the intermediate draw bar are jointly connected with a hoop. According to the drilling pump piston rod and intermediate draw bar assembly interference eliminating deviceprovided by the invention, the piston rod can be connected and installed at any position within the range of 2r away from the axis of the intermediate draw bar through free rotation of the two eccentric discs, and the problems of eccentric wear of a piston cylinder sleeve and forced assembly of the piston rod caused by non-coaxiality of the intermediate draw bar and the piston rod are solved.
Description
technical field [0001] The invention belongs to the technical field of high-pressure drilling pumps, and relates to a device for eliminating the assembly interference between a piston rod of a drilling pump and an intermediate tie rod. Background technique [0002] The cross head, intermediate tie rod, piston rod and cylinder liner piston of the hydraulic end of the drilling pump are theoretically coaxial, such as figure 1 As shown, the middle tie rod 2 and the piston rod 5 are connected by the clamp 3, and the other end of the piston rod 5 is connected with the piston 6, wherein the connection assembly between the crosshead, the middle tie rod and the piston rod is radially positioned through the cylindrical pin and the pin hole . However, when the drilling pump assembles or replaces the piston rod, due to the cumulative effect of the processing of the assembled parts and the assembly error, the assembly interference occurs when the piston rod and the intermediate tie rod ...
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IPC IPC(8): F04B53/14F04B53/22F04B53/00
CPCF04B53/14F04B53/144F04B53/147F04B53/22F04B53/00
Inventor 李永飞曾兴昌郝建旭张斌景佐军周小明
Owner 中油国家油气钻井装备工程技术研究中心有限公司