Drilling pump valve cover thread pre-tightening and anti-loosening device
A bonnet thread and drilling pump technology, which is applied to threaded fasteners, parts of a pumping device for elastic fluid, screws, etc., can solve the difficulty of pre-tightening and anti-loosening of bonnet threads, and the pre-tightening effect is not good , short service life and other problems, to achieve the effect of solving easy loosening failure, solving the difficulty of preventing and preventing loosening, and avoiding frequent puncture and leakage
Active Publication Date: 2017-10-31
BAOJI PETROLEUM MASCH CO LTD +2
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to provide a drilling pump bonnet thread pre-tightening and anti-loosening device, which solves the problems in the prior art that the bonnet thread pre-tightening and anti-loosening is difficult, the pre-tightening effect is not good, the bonnet moves, and the service life is short.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0015] refer to figure 1 , the structure of the bonnet sealing device in the prior art is that a bonnet 9 is installed in the step hole of the hydraulic cylinder body 8, and the outer periphery of the bonnet 9 is connected with the hydraulic cylinder body 8 through a large-size trapezoidal screw thread, and in the hydraulic cylinder body 8 There is a sealing groove along the edge of the step hole, and a valve cover sealing ring 7 is installed in the sealing groove. The valve cover sealing ring 7 is compressed by the end surface of the valve cover 9, and the lower end surface of the valve cover 9 is connected with the piston.
[0016] refer to figure 2 , the structure of the present invention is that a pressure cap 1, a wedge 4 and a gland 6 are sequentially installed in the step hole of the hydraulic cylinder body 8 from top to bottom, and ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a thread pre-tightening and locking device for a well drilling pump valve cover. A pressing cap, wedge blocks and a gland are sequentially mounted from top to bottom in a step hole of a hydraulic cylinder body; the pressing cap is in threaded connection with the hydraulic cylinder body; a plurality of wedge blocks are arranged at the lower part of the pressing cap; all wedge blocks are concentrically arranged to form an approximate ring; all wedge blocks are together provided with a spring along the outer circumferential direction; the lower end of a bolt is arranged in a space formed by the inner surfaces of all wedge blocks; a locknut is mounted on a screw rod at the upper end of the bolt after the screw rod passes through the bottom end face of the pressing cap; all wedge blocks sit on the upper surface of the same gland; a blind hole which sleeves the lower end of the bolt is formed in the center of the upper surface of the gland; and the gland is in hermetic contact with the step hole of the hydraulic cylinder body by virtue of a valve cover sealing ring. The device disclosed by the invention is reliable in pre-tightening and locking and especially applicable to a valve cover of a high-pressure well drilling pump.
Description
technical field [0001] The invention belongs to the technical field of oil and gas drilling and production equipment, and relates to a thread pre-tightening and anti-loosening device for a valve cover of a drilling pump. Background technique [0002] The bonnet of the drilling pump is located on the upper part of the valve cavity, and the valve and other wearing parts can be replaced by removing it. The valve cover and the cylinder body are connected by large-scale trapezoidal threads. Due to the difficulty of pre-tightening and pre-tightening force control of the large thread and the large pressure fluctuations at the bonnet (especially the suction bonnet), the threads of the bonnet of the drilling pump are often loosened, resulting in the failure of the bonnet sealing ring and even the damage of the bonnet thread. , Seriously affect the performance of the drilling pump. [0003] Aiming at the above problems of pre-tightening and anti-loosening difficulties of the bonnet ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F04B53/10F16B39/12
CPCF04B53/10F16B39/122F16B39/126
Inventor 周小明蒲容春郝建旭廖刚田占川
Owner BAOJI PETROLEUM MASCH CO LTD