CN2519036Y

CN2519036Y - Soft friction cylindrical oil-well pump

Info

Publication number: CN2519036Y
Application number: CN 01241426
Authority: CN
Inventors: 赵国璋
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-27
Filing date: 2001-04-27
Publication date: 2002-10-30
Anticipated expiration: 2011-04-27

Abstract

The utility model relates to a soft friction cylindrical oil-well pump, belonging to the field of petroleum machinery skill. The utility model is characterized in that KBC rubber cushion pads are respectively arranged at the tops and the bottoms of the oil-taking top valve ball bed and the oil-taking bottom valve ball bed, the top and the bottom of the valve ball bed which is arranged in the plunger body assembly, and the bottom of the valve ball bed which is arranged at the top of the plunger body assembly; two KBC rubber cushions are respectively arranged at the top end and the bottom end of the plunger body which is arranged between the plunger body and the pump barrel, the top ball bed and the bottom ball bed of the oil-taking valve, the top bed and the bottom bed of the valve ball which is in the plunger and the valve ball bed which is arranged at the top of the plunger body assembly are take the sphere structures. The utility model has the advantages of different wear, long service time and good seal; the impact from the valve ball to the valve seat is buffered, extending the service time of the pump, and reducing the shape side of the oil well pump; Thereby the utility model is suitable for being used in the medium-sized and small oil field.

Description

The cartridge type oil well pump is wiped in buffing

The utility model belongs to the petroleum machinery technical field, relates to a kind of improvement to the cartridge type oil well pump.

The piston assembly and the pump barrel of the cartridge type oil well pump of past China's use all are steel, and the friction between piston assembly and the pump barrel is the friction between steel and the steel, and is easy to wear, damage the back and are difficult for repairing, so unreasonable.Require sealing between plunger body assembly and the pump barrel, surface requirements roughness that it is mutual and dimensional accuracy height, must increase the length of plunger body for reaching sealing, tortuosity to pump barrel requires also very tight, in case pump barrel has tortuosity, long-plunger is to-and-fro motion therein, must block plunger body, if the grains of sand in the crude oil also stopping accident can take place in the middle of snapping in plunger body and pump barrel inwall; Valve ball clashes into valve seat repeatedly and makes valve ball and valve seat fragile in addition, causes poorly sealedly, reduces pumping efficiency.

Goal of the invention of the present utility model is to provide between a kind of plunger body and the pump barrel that wearing and tearing are little, good seal and the valve ball buffing wiping cartridge type oil well pump little with the valve seat wearing and tearing.

The utility model is based on existing barrel-type pump, its structure is: be made up of pump barrel and the plunger body assembly of installing in it, upper end at pump barrel is equipped with helmet, oil-feed valve ball and valve ball seat up and down are installed in its lower end, bottom in the plunger body assembly is equipped with valve ball and valve ball seat up and down, on the top of plunger body assembly the valve ball seat is installed, feature of the present utility model is that the top and the bottom of valve ball seat are separately installed with the KBC rubber buffer up and down in oil-feed; The top and the bottom of the valve ball seat in the plunger body assembly are separately installed with the KBC rubber buffer; The lower end of the valve ball seat on the plunger body assembly is equipped with the KBC rubber buffer; Two KBC cushion rubbers are equipped with at the two ends up and down of plunger body respectively between plunger body and pump barrel, and respectively there is outside triangle convex edge (as shown in Figure 3) the interior lateral section both sides of KBC cushion rubber; The valve ball seat of seat and plunger body assembly upper end adopts spheric structure about the valve ball on the oil-feed valve in lower ball base, the plunger.

Good effect of the present utility model is that the plunger body assembly moves under the environment that buffing is wiped, thereby not easy to wear, and the life-span is long, good seal; Owing to adopt KBC seal ring and sphere valve ball seat, make valve ball obtain buffering to the impact of valve seat, weakened the impact of valve ball to the valve ball seat, prolonged the life-span of oil pump, can reduce the boundary dimension of oil well pump again.

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

Fig. 2 is a local structure for amplifying schematic representation of the present utility model;

Fig. 3 is the structural representation of KBC cushion rubber of the present utility model.

Further narrate the utility model below in conjunction with accompanying drawing:

The utility model is based on existing barrel-type pump, its structure is: be made up of pump barrel 3 and the plunger body assembly of installing in it 4, in the upper end of pump barrel 3 helmet 1 is installed, oil-feed valve ball and valve ball seat up and down are installed in its lower end, bottom in plunger body assembly 4 is equipped with valve ball and valve ball seat up and down, valve ball and valve ball seat are installed on the top of plunger body assembly 4, feature of the present utility model is that the top and the bottom of valve ball seat are separately installed with KBC rubber buffer 16 up and down in oil-feed, 17, the top and the bottom of the valve ball seat in plunger body assembly 4 are separately installed with KBC rubber buffer 12,15, the lower end of the valve ball seat on the plunger body assembly is equipped with KBC rubber buffer 9.Two KBC cushion rubbers are equipped with at the two ends up and down of plunger body respectively between plunger body 4 and pump barrel 3, and respectively there is outside triangle convex edge (as shown in Figure 3) the interior lateral section both sides of KBC cushion rubber.The KBC cushion rubber has wear-resisting, and the little advantage of friction ractor.Leg-of-mutton convex edge is 45 degree, and it is wiped foreign material off from the pump barrel inwall, and prevents that foreign material from entering plunger body, and each KBC seal ring can bear 600 kilograms/cm ²Pressure, so crude oil can not be missed from gap location between plunger body and the pump barrel.The valve ball seat of seat and plunger upper end adopts spheric structure about the valve ball on the oil-feed valve in lower ball base, the plunger.

The utility model is work like this: when plunger body 4 moves upward, the oil-feed valve ball is opened, valve ball and valve seat are blocked oil circuit in the plunger body assembly 4, and crude oil is by in the chamber between oil-feed valve ball lateral space suction plunger body assembly and oil-feed valve ball and the seat; When plunger body 4 moves downward, valve ball in the plunger body is opened, the oil-feed valve ball is fallen on the valve seat and sealing, the plunger body assembly that moves downward is also opened the valve ball of plunger body assembly upper end because valve ball has been opened, and from then on oil rushed in, last oil is discharged in the oil pick-up tube, pumping unit to-and-fro motion, oil pick-up tube drive the to-and-fro motion of plunger body assembly, and the oil sources source constantly is pumped in the oil sump on the face of land.

KBC rubber buffer

9,12,15,16,17 is all arranged at the bottom of 3 valve seats of the present utility model, when valve ball is subjected to the hydraulic shock valve seat, valve seat is with the stressed KBC rubber buffer of passing to of institute, the KBC rubber buffer produces resiliently deformable and power is passed on the lower part, after valve ball falls into valve seat, the KBC rubber buffer promptly recovers resiliently deformable, promptly still keeps original state.

When upwards impacting after valve ball is stressed, by shock surface because be the spill sphere, make stressed reducing on the valve ball unit area, the last valve ball impact force that makes progress is also absorbed by the KBC rubber buffer, the KBC rubber buffer produces resiliently deformable, and at last that the KBC rubber buffer is suffered power is passed on the plunger body.The impact of valve ball finishes back KBC rubber buffer and recovers resiliently deformable thereupon, promptly still keeps original state.

At plunger body assembly 4 lower end valve balls and valve seat place, when if valve ball upwards impacts, valve ball be sphere by impact site, its part that is touched resembles the mortar empennage, upper end at this empennage contacts with the KBC rubber buffer, the valve ball impact force is absorbed by the KBC rubber buffer, and the stressed back of KBC rubber buffer this moment produces resiliently deformable, and remaining force is passed to plunger body assembly 4.

Adopt the utility model, its plunger can shorten, and has improved sealing.

Claims

1, the cartridge type oil well pump is wiped in a kind of buffing, form by pump barrel (3) and its interior plunger body assembly (4) of installation, in the upper end of pump barrel (3) helmet (1) is installed, oil-feed valve ball and valve ball seat up and down are installed in its lower end, bottom in plunger body assembly (4) is equipped with valve ball and valve ball seat up and down, top at plunger body assembly (4) is equipped with the valve ball seat, it is characterized in that: the top and the bottom of valve ball seat are separately installed with KBC rubber buffer (16,17) up and down in oil-feed; The top of the valve ball seat in plunger body assembly (4) and bottom are separately installed with KBC rubber buffer (12,15); The lower end of the valve ball seat on plunger body assembly (4) is equipped with KBC rubber buffer (9).

2, the cartridge type oil well pump is wiped in buffing according to claim 1, and it is characterized in that: two KBC cushion rubbers are equipped with at the two ends up and down of plunger body respectively between plunger body (4) and pump barrel (3).

3, the cartridge type oil well pump is wiped in buffing according to claim 2, and it is characterized in that: respectively there is outside triangle convex edge the interior lateral section both sides of described KBC cushion rubber.

4, the cartridge type oil well pump is wiped in buffing according to claim 1, it is characterized in that: the valve ball seat of seat and plunger body assembly upper end adopts spheric structure about the valve ball on the described oil-feed valve in lower ball base, the plunger.