CN201474928U

CN201474928U - Oil extraction diaphragm pump

Info

Publication number: CN201474928U
Application number: CN2009201672797U
Authority: CN
Inventors: 宋玉杰; 温后珍; 孟碧霞
Original assignee: DAQING PETROLEUM INSTITUTE
Current assignee: DAQING PETROLEUM INSTITUTE
Priority date: 2009-08-04
Filing date: 2009-08-04
Publication date: 2010-05-19
Anticipated expiration: 2019-08-04

Abstract

The utility model relates to an oil extraction diaphragm pump which mainly solves the problems of the prior screw pump such as short service life and pump inspection period. The oil extraction diaphragm pump is characterized by comprising a diaphragm consisting of rubber-clad steel wires, a central shaft, an eccentric bushing with a sleeve and four one-way valves, wherein after the diaphragm is folded, the middle part of the diaphragm is fixed on the sleeve, and the two ends of the diaphragm are fixed on a pump case; the diaphragm divides the pump case into two cavities which are not mutually communicated; one-way valve mounting holes are formed in an upper end cover and a lower end cover corresponding to the two cavities; the one-way valves are arranged in the one-way valve mounting holes; and mediums of the one-way valves on the lower end cover flow inwards, and mediums of the one-way valves on the upper end cover flow outwards. The oil extraction diaphragm pump has a simple structure, is applicable to wells with high sand and thick oil contents and has the advantages of corrosion resistance and long service life and pump inspection period.

Description

The oil recovery diaphragm pump

Technical field:

The utility model relates to a kind of oil field extracting device of oil, relates to a kind of oil extraction pump that can promote flow stream pressure specifically.

Background technique:

Screw pump is to use more a kind of oil production equipment at present on the oil field, there are the following problems but these screw pumps are found through long application: because swelling easily takes place screw pump stator rubber, gap between stator and rotor is changed, therefore, the wearing and tearing of stator are bigger, damage easily, finally cause life-span weak point, the pump detection period of screw pump short, influenced the manufacturing efficiency in oil field to a certain extent.

The model utility content:

In order to solve the problem that the existing screw pump life-span is short, pump detection period is short, the utility model provides a kind of oil recovery diaphragm pump, this kind oil recovery diaphragm pump structure is simple, can adapt to the hole condition that height contains sand, thick oil well, has characteristics corrosion-resistant, that the life-span long, pump detection period is long.

The technical solution of the utility model is: this kind oil recovery diaphragm pump, comprise pump case and upper and lower end cap, and diaphragm, a central shaft, an eccentric bushing and four one-way valves that constitute by rubber Baogang silk.Wherein, described central shaft is fixed in the pump case, and setting-up eccentricity cover on central shaft by the key transferring power, is equipped with the sleeve that can freely rotate around eccentric bushing between described central shaft and the eccentric bushing on described eccentric bushing; In addition, after described diaphragm doubling, its middle part is fixed on the sleeve, and its two ends then are fixed on the pump case, and described diaphragm is called chamber one and chamber two with being separated into two disconnected each other chambers in the pump case; In described upper and lower end cap, have and chamber one, two each self-corresponding one-way valve mounting holes, built-in one-way valve, wherein, the one-way valve media flow direction on the described lower end cap is for entering, and the one-way valve media flow direction on the upper end cap is for discharging.

The utlity model has following beneficial effect: the oil recovery diaphragm pump that the utility model proposed is to form Seal cage by steel and rubber, and there is not slide relative between the shell done of the diaphragm of rubber of oil recovery diaphragm pump and steel, end cap, not friction, therefore insensitive to swell rubber, so not easy to wear, the life-span is longer.In addition, the part in the oil recovery diaphragm pump Seal cage does not have slide relative, does not have friction, and therefore, it is very high that the corrosion resistance of pump can reach, and can adapt to the hole condition that height contains sand, thick oil well.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a radial section schematic representation one of the present utility model.

Fig. 3 is a radial section schematic representation two of the present utility model.

Fig. 4 is an erection drawing of the present utility model.

1-pump case among the figure, 2-central shaft, 3-eccentric bushing, 4-sleeve, 5-upper end cap, 6-diaphragm, 7-chamber two, 8-chamber one, 9-lower end cap, 10-one-way valve mounting hole.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this kind oil recovery diaphragm pump comprises pump case 1 and upper end cap 5, lower end cap 9, and diaphragm that is made of rubber Baogang silk 6, central shaft 2, eccentric bushing 3 and four one-way valves.Wherein, described central shaft 2 is fixed in the pump case 1, and setting-up eccentricity cover 3 on central shaft 2, passes through the key transferring power between described central shaft 2 and the eccentric bushing 3, and the sleeve 4 that can freely rotate around eccentric bushing is housed on described eccentric bushing 3.In addition, after described diaphragm 6 doublings, its middle part is fixed on the sleeve 4, and its two ends then are fixed on the pump case 1, and described diaphragm 6 is called chamber 1 and chamber 27 with being separated into two disconnected each other chambers in the pump case; In described upper end cap 5, lower end cap 9, have and chamber one, two each self-corresponding one-way valve mounting holes 10, built-in one-way valve, wherein, the one-way valve media flow direction on the described lower end cap is for entering, and the one-way valve media flow direction on the upper end cap is for discharging.In above technological scheme, the final barrier film that forms is the diaphragm that a kind of rubber Baogang silk is made, and is fixed by pump case and upper and lower end cap around it, and when sleeve drove barrier film middle part upper and lower translation, barrier film can be made corresponding distortion.

Working procedure of the present utility model is as follows:

Sucker rod drives the central shaft rotation, and then central shaft drive eccentric bushing rotates together around the center of pump, produces radially slide relative between eccentric bushing and the sleeve, orders about sleeve and drives barrier film middle part upper and lower translation.It is minimum that state as shown in Figure 2, chamber two volumes reach, and the position begins thus, the central shaft rotation, and then chamber two volumes progressively enlarge, and fluid pressures reduce in the chamber two, and chamber two sucks liquid.And chamber one volume progressively dwindles, and fluid pressure rises in the chamber one, chamber one drain.After central shaft was by position shown in Figure 2 Rotate 180 degree, then chamber one volume reached minimum, and chamber one discharge opeing finishes, and it is maximum that chamber two volumes reach, and chamber two imbibitions finish.As shown in Figure 3, central shaft is crossed 180 degree and is continued rotation, and then chamber one volume progressively enlarges, and chamber one internal pressure descends, and chamber sucks liquid at the beginning, and chamber two volumes progressively dwindle, and chamber two internal pressures rise, chamber two beginning drains.When central shaft rotates to 360 when spending, pump is promptly got back to state shown in Figure 2.

The erection drawing of this kind of oil recovery diaphragm pump as shown in Figure 4, it is cooperated by two semi-circular casing parts, form circular pump case, respectively there is the semicircular end cap sealing of two splits at the two ends of pump case, the hole that one-way valve is installed is arranged on each semicircle end cap, also have a semicircle orifice at the center, after two semicircular end caps cooperated, becoming the center had the axis hole both sides that the circular end cap of unidirectional valve opening is arranged.A central shaft is installed at the center of pump, central shaft by Bearing Installation in the center hole of both sides end cap.Setting-up eccentricity cover on the central shaft, central shaft transmits radially power by key, drives the eccentric bushing rotation.Sleeve is housed on the eccentric bushing, and when central shaft drove the eccentric bushing rotation, eccentric bushing and sleeve produced radially slide relative, drove the sleeve radial translation.Diaphragm can be that a kind of center is a steel wire, and the attached flexible part with rubber in outside is fixed on respectively in the centre joint of shell and end cap around the diaphragm, goes up the Seal cages that the lower semi-circle end caps form a hollow for two of 1 diaphragm and 1 semicircle shell and homonymy.Because the middle part of diaphragm is fixed on the sleeve, when the sleeve radial translation, diaphragm is then and then made radial deformation, and the distortion that the Seal cage volume size of this diaphragm side is then followed diaphragm changes.Central shaft continues rotation, and then the Seal cage volume of both sides follows suit and periodically changes, and adds the cooperation of one-way valve on the end cap of both sides, just can realize the suction of liquid, the process of discharge.

Experiment showed, this oil recovery diaphragm pump because it is to form Seal cage by steel and rubber through a series of, do not have slide relative between the shell that the diaphragm of rubber of oil recovery diaphragm pump and steel are done, the end cap, not friction, therefore insensitive to swell rubber, so not easy to wear, pump detection period is longer.In addition,, do not have friction, so the corrosion resistance of pump can reach very high, go for the hole condition that height contains sand, thick oil well because part does not have slide relative in the Seal cage of oil recovery diaphragm pump.

Claims

1. oil recovery diaphragm pump, comprise pump case (1) and upper and lower end cap (5,9), it is characterized in that: described oil recovery diaphragm pump also comprises the diaphragm (6), a central shaft (2), an eccentric bushing (3) and four one-way valves that are made of rubber Baogang silk, wherein, described central shaft (2) is fixed in the pump case (1), go up setting-up eccentricity cover (3) at central shaft (2), by the key transferring power, the sleeve (4) that can freely rotate around eccentric bushing is housed on described eccentric bushing (3) between described central shaft (2) and the eccentric bushing (3);

In addition, after described diaphragm (6) doubling, its middle part is fixed on the sleeve (4), and its two ends then are fixed on the pump case (1), and described diaphragm (6) will be separated into two disconnected each other chambers in the pump case, be called chamber one (8) and chamber two (7);

In described upper and lower end cap (5,9), have and each self-corresponding one-way valve mounting hole (10) of chamber one, two (8,7), built-in one-way valve, wherein, the one-way valve media flow direction on the described lower end cap is for entering, and the one-way valve media flow direction on the upper end cap is for discharging.