阅读说明：本技术 一种注水自动过滤反洗装置 (Water injection automatic filtration backwash device ) 是由 肖云东 于 2020-06-19 设计创作，主要内容包括：一种注水自动过滤反洗装置。涉及采油技术领域。壳体一侧通过卡箍连接出水管,壳体内端面密封连接过滤筒,过滤筒的另一侧与卡箍密封连接；壳体的上下与旁通腔管连通,上部的旁通管内孔与反洗活塞间隙配合连接,反洗活塞上部设有弹簧,下部的旁通管内与过滤活塞间隙配合连接,过滤活塞下部设有弹簧。本发明具有如下有益效果：通过设置反洗活塞和过滤活塞,利用过滤筒内外的压差变化,达到自动反洗的目的,具有保证注入液体的水质指标、无需人工操作,注入过程不间断的特点,通过设置网格垫片过滤连通管流入的液体,防止杂物进入活塞腔造成活塞移动卡滞,通过设置调整螺丝,调整弹簧的预紧度,改变活塞上下的压力差数值,可适应不同注水压力要求。(An automatic water injection filtering backwashing device. Relates to the technical field of oil extraction. One side of the shell is connected with a water outlet pipe through a clamp, the inner end surface of the shell is connected with a filter cartridge in a sealing way, and the other side of the filter cartridge is connected with the clamp in a sealing way; the upper part and the lower part of the shell are communicated with the bypass cavity pipe, the inner hole of the bypass pipe at the upper part is in clearance fit connection with the backwashing piston, the upper part of the backwashing piston is provided with a spring, the bypass pipe at the lower part is in clearance fit connection with the filtering piston, and the lower part of the filtering piston is provided with a spring. The invention has the following beneficial effects: through setting up the backwash piston and filtering the piston, utilize the inside and outside differential pressure change of cartridge filter, reach automatic backwash's purpose, the quality of water index of guaranteeing the injected liquid has, need not manual operation, the incessant characteristics of injection process, through setting up the liquid that the net gasket filtered communicating pipe flowed in, prevent that debris from getting into the piston chamber and causing the piston to remove the jamming, through setting up the adjusting screw, the pretension degree of adjusting the spring changes the pressure differential numerical value about the piston, adaptable different water injection pressure requirements.)

1. The utility model provides a water injection automatic filtration backwash device, includes casing (1), its characterized in that: one side of the shell (1) is connected with a water outlet pipe (4) through a hoop (3), the end surface of the other side of the shell (1) is connected with the filter cartridge (2) in a sealing way, and the other side of the filter cartridge (2) is connected with the hoop (3) in a sealing way;

the upper part and the lower part of the shell (1) are respectively communicated with a bypass cavity pipe (15), the inner hole of the bypass pipe (15) at the upper part is in clearance fit connection with a backwashing piston (9), and the upper part of the backwashing piston (9) is provided with a spring (5);

the lower part of the backwashing piston (9) is provided with a central hole (11), the middle part of the backwashing piston (9) is transversely provided with a side hole (18), the side hole (18) is communicated with the central hole (11), the outer cylindrical surface of the backwashing piston (9) outside the side hole (18) is provided with an annular groove (10), and the backwashing piston (9) is provided with three sealing rings: a sealing ring B (19) and a sealing ring C (20) are respectively arranged above and below the ring groove (10), a sealing ring A (8) is arranged on the upper portion of the sealing ring B (19), and the distance between the sealing ring A (8) and the sealing ring B1(9) is equal to the distance between the sealing ring B (19) and the sealing ring C (20);

the inside of a bypass pipe (15) at the lower part is in clearance fit connection with a filtering piston (17), and the lower part of the filtering piston (17) is provided with a spring (5);

filter piston (17) upper portion and open and to have centre bore (11), filter piston (17) middle part transversely opens there is side opening (18), and side opening (18) and centre bore (11) intercommunication, and it has annular (10) to open on the outside filtration piston (17) outer cylindrical surface of side opening (18), filters and is equipped with three sealing washers altogether on piston (17): a sealing ring B (19) and a sealing ring C (20) are respectively arranged above and below the ring groove (10), a sealing ring A (8) is arranged on the upper portion of the sealing ring B (19), and the distance between the sealing ring A (8) and the sealing ring B1(9) is equal to the distance between the sealing ring B (19) and the sealing ring C (20);

a backwashing water outlet pipe 14 is arranged on one side of the upper by-pass pipe 15 and communicated with the upper by-pass pipe 15 at a position between a sealing ring A8 and a sealing ring B19 of the backwashing piston 9, a water inlet pipe 12 is arranged on one side of the lower by-pass pipe 15 and communicated with the lower by-pass pipe 15 at positions of a sealing ring B19 and a sealing ring C20 of the filtering piston 17;

the top of the upper bypass pipe (15) is communicated with a communicating pipe (16), the communicating pipe (16) is communicated with the shell (1), and the communicating pipe (16) is communicated with the bottom of the lower bypass pipe (15).

2. The water injection automatic filtration backwashing device of claim 1, wherein: the backwashing filter is characterized in that a spring (5) is arranged on the upper portion of the backwashing piston (9), a grid gasket (13) is arranged between the upper portion of the spring (5) and the top plane of the bypass pipe (16), the spring (5) is arranged on the lower portion of the filtering piston (17), and the grid gasket (13) is arranged between the lower portion of the spring (5) and the bottom plane of the bypass pipe (15).

3. The water injection automatic filtration backwashing device of claim 1, wherein: the bottom of the lower bypass pipe (15) is provided with a threaded hole in threaded sealing connection with the adjusting bolt (7), and the top of the upper bypass pipe (15) is provided with a threaded hole in threaded sealing connection with the adjusting bolt (7).

The technical field is as follows:

the invention relates to the technical field of oil extraction, in particular to an automatic water injection filtering backwashing device.

Background art:

the oil field water injection well is equipped with the well head filter at the well head, as last one quality of water guarantee measure before the injection, the well head filter need open the washing cartridge filter promptly in order to prevent that the cartridge filter from blockking up, guarantee the quality of water index of injected water simultaneously filtering a period, need the artifical pressure variation who patrols and monitors the well head filter, has artificial factor to lead to water injection quality of water to obtain not guaranteed, the washing amount of labour is big, the water injection is interrupted the scheduling problem.

The invention content is as follows:

in order to solve the problems, the invention provides a water injection automatic filtration backwashing device.

The technical scheme of the invention is as follows: an automatic water injection filtering backwashing device comprises a shell, wherein one side of the shell is connected with a water outlet pipe through a hoop, the end surface of the other side of the shell is connected with a filter cartridge in a sealing way, and the other side of the filter cartridge is connected with the hoop in a sealing way;

the upper part and the lower part of the shell are respectively communicated with a bypass cavity pipe, the inner hole of the bypass pipe at the upper part is in clearance fit connection with a backwashing piston, and the upper part of the backwashing piston is provided with a spring;

the lower part of the backwashing piston is provided with a central hole, the middle part of the backwashing piston is transversely provided with a side hole, the side hole is communicated with the central hole, the outer cylindrical surface of the backwashing piston outside the side hole is provided with an annular groove, and the backwashing piston is provided with three sealing rings: a sealing ring B and a sealing ring C are respectively arranged above and below the ring groove, a sealing ring A is arranged on the upper portion of the sealing ring B, and the distance between the sealing ring A and the sealing ring B is equal to the distance between the sealing ring B and the sealing ring C;

the inside of the bypass pipe at the lower part is in clearance fit connection with the filtering piston, and the lower part of the filtering piston is provided with a spring;

the upper part of the filtering piston is provided with a central hole, the middle part of the filtering piston is transversely provided with a side hole, the side hole is communicated with the central hole, the outer cylindrical surface of the filtering piston outside the side hole is provided with a ring groove, and the process piston is provided with three sealing rings: a sealing ring B and a sealing ring C are respectively arranged above and below the ring groove, a sealing ring A is arranged on the upper portion of the sealing ring B, and the distance between the sealing ring A and the sealing ring B is equal to the distance between the sealing ring B and the sealing ring C;

a backwashing water discharge pipe is arranged on one side of the upper bypass pipe and communicated with the upper bypass pipe at a position between a sealing ring A and a sealing ring B of the backwashing piston, a water inlet pipe is arranged on one side of the lower bypass pipe and communicated with the lower bypass pipe at a position between the sealing ring B and the sealing ring B of the filtering piston;

the top of the upper by-pass pipe is communicated with a communicating pipe, the communicating pipe is communicated with the shell, and the communicating pipe is communicated with the bottom of the lower by-pass pipe.

The backwashing piston is characterized in that a spring is arranged on the upper portion of the backwashing piston, a grid gasket is arranged between the upper portion of the spring and the top plane of the bypass pipe, a spring is arranged on the lower portion of the filtering piston, and a grid gasket is arranged between the lower portion of the spring and the bottom plane of the bypass pipe.

The bottom of the lower bypass pipe is provided with a threaded hole in threaded sealing connection with an adjusting bolt, and the top of the upper bypass pipe is provided with a threaded hole in threaded sealing connection with an adjusting bolt.

The invention has the following beneficial effects: through setting up the backwash piston and filtering the piston, utilize the inside and outside pressure differential change of cartridge filter (the cartridge filter has the trend of jam), reach automatic backwash's purpose, the quality of water index of guaranteeing the injection liquid has, need not manual operation, the incessant characteristics of injection process, through setting up the liquid that the net gasket filtered communicating pipe flowed in, prevent that debris from getting into the piston chamber and causing the piston to remove the jamming, through setting up the adjusting screw, the pretension of adjusting spring, change the pressure differential numerical value about the piston, adaptable different water injection pressure requirements.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the backwash state structure of the present invention.

In the figure, 1-shell, 2-filter cylinder, 3-clamp, 4-water outlet pipe, 5-spring, 6-sealing cover, 7-adjusting bolt, 8-sealing ring A, 9-backwashing piston, 10-ring groove, 11-center hole, 12-water inlet pipe, 13-grid gasket, 14-backwashing drain pipe, 15-bypass pipe, 16-communicating pipe, 17-filter piston, 18-side hole, 19-sealing ring B, 20-sealing ring C.

The specific implementation mode is as follows:

the invention will be further described with reference to the accompanying drawings in which:

as shown in the joint of figure 1 and figure 2, the water injection automatic filtering backwashing device comprises a shell 1, wherein one side of the shell 1 is connected with a water outlet pipe 4 through a hoop 3, the end surface of the other side of the shell 1 is connected with a filter cartridge 2 in a sealing way, and the other side of the filter cartridge 2 is connected with the hoop 3 in a sealing way;

the upper part and the lower part of the shell 1 are respectively communicated with a bypass cavity pipe 15, the inner hole of the bypass pipe 15 at the upper part is in clearance fit connection with a backwashing piston 9, and the upper part of the backwashing piston 9 is provided with a spring 5;

the lower part of the backwashing piston 9 is provided with a central hole 11, the middle part of the backwashing piston 9 is transversely provided with a side hole 18, the side hole 18 is communicated with the central hole 11, the outer cylindrical surface of the backwashing piston 9 outside the side hole 18 is provided with an annular groove 10, and the backwashing piston 9 is provided with three sealing rings: the upper part and the lower part of the ring groove 10 are respectively provided with a sealing ring B19 and a sealing ring C20, the upper part of a sealing ring B19 is provided with a sealing ring A8, and the distance between the sealing ring A8 and the sealing ring B19 is equal to the distance between a sealing ring B19 and a sealing ring C20;

the inside of the bypass pipe 15 at the lower part is in clearance fit connection with a filtering piston 17, and the lower part of the filtering piston 17 is provided with a spring 5;

filter piston 17 upper portion and open there is centre bore 11, and filter piston 17 middle part transversely opens has limit hole 18, and limit hole 18 and centre bore 11 intercommunication open on the outer cylindrical surface of filter piston 17 of limit hole 18 outside has annular 10, filters and is equipped with three sealing washers altogether on the piston 17: the upper part and the lower part of the ring groove 10 are respectively provided with a sealing ring B19 and a sealing ring C20, the upper part of a sealing ring B19 is provided with a sealing ring A8, and the distance between the sealing ring A8 and the sealing ring B19 is equal to the distance between a sealing ring B19 and a sealing ring C20;

a backwashing water outlet pipe 14 is arranged on one side of the upper by-pass pipe 15 and communicated with the upper by-pass pipe 15 at a position between a sealing ring A8 and a sealing ring B19 of the backwashing piston 9, a water inlet pipe 12 is arranged on one side of the lower by-pass pipe 15 and communicated with the lower by-pass pipe 15 at positions of a sealing ring B19 and a sealing ring C20 of the filtering piston 17;

the top of upper bypass pipe 15 communicates with communication pipe 16, communication pipe 16 communicates with housing 1, and communication pipe 16 communicates with the bottom of lower bypass pipe 15.

When the water injection pressure is certain, the spring 5 is arranged at the upper part of the backwashing piston 9, the top part of the backwashing piston 9 bears the pressure inside the filter cylinder 2 in the shell 1 brought by the communicating pipe 16, the bottom part of the backwashing piston 9 bears the pressure of the injected liquid brought by the water inlet pipe 12, and the pressure difference between the inside and the outside of the filter cylinder 2 is caused by the interception of the filter cylinder 2 and the resistance of the filter screen, namely the pressure difference between the bottom and the top of the backwashing piston 9, the pressure at the bottom of the backwashing piston 9 is larger than the pressure at the top, the pressure difference is balanced by the spring 5, so that the annular groove 10 of the backwashing piston 9 is not communicated with the backwashing water discharge pipe 14, the principle of the filtering piston 17 is the same as that of the backwashing piston 9, under the action of certain pressure difference and spring 5, the annular groove 10 of the filtering piston 17 is positioned at the position communicated with the water inlet pipe 12, and inlet water enters the shell 1 through the central hole 11, the side holes 18 and the annular groove 10 and is injected into a wellhead after being filtered by the filter cartridge 2.

Along with the lapse of water injection time, the debris that the cartridge filter 2 surface intercepted are more and more, the cartridge filter 2 outside is the pressure is also bigger and more, the injection pressure that increases and the pressure differential in the cartridge filter 2 are bigger and bigger, break through the equilibrium of backwash piston 9 and filter piston 17, backwash piston 9 rises, filter piston 17 descends, filter piston 17's sealing washer A8 and sealing washer B19 move to the inlet tube 12 position, cut off the communicating channel in inlet tube 12 and casing 1; the sealing ring B19 and the sealing ring C20 of the backwashing piston 9 (namely the ring groove 10 position of the backwashing piston 9) move to the position of the backwashing drain pipe 14, the water injection stops, the pressure in the filter cylinder 2 is communicated with the backwashing drain pipe 14, the liquid in the filter cylinder 2 flows out from the interior of the filter cylinder 2 to drive the sundries flow channel backwashing drain pipe 14 attached to the surface of the filter cylinder 2 to discharge, the pressure outside the filter cylinder 2 disappears along with the stop of the injection pressure, the backwashing piston 9 descends under the action of the pressure in the filter cylinder 2 and the spring 5, the filter piston 17 ascends to recover the filtering state, and the backwashing process is caused by the increase of the pressure difference and the increase of the elasticity of the spring 5, so the backwashing process occurs in a pulse mode, and the injection process can be.

Through setting up the backwash piston and filtering the piston, utilize the inside and outside differential pressure change of cartridge filter (the cartridge filter has the trend of jam), reach the purpose of automatic backwash, have the quality of water index of guaranteeing the injected liquid, need not manual operation, characteristics that the injection process is incessant.

The upper part of the backwashing piston 9 is provided with a spring 5, a grid gasket 13 is arranged between the upper part of the spring 5 and the top plane of the by-pass pipe 16, the lower part of the filtering piston 17 is provided with the spring 5, the grid gasket 13 is arranged between the lower part of the spring 5 and the bottom plane of the by-pass pipe 15, and the grid gasket 13 is arranged to filter liquid flowing in the communicating pipe, so that sundries are prevented from entering a piston cavity to cause piston movement clamping stagnation.

The bottom of the lower bypass pipe 15 is provided with a threaded hole which is connected with the adjusting bolt 7 in a threaded sealing manner, the top of the upper bypass pipe 15 is provided with a threaded hole which is connected with the adjusting bolt 7 in a threaded sealing manner, the adjusting bolt is rotated to move up and down, the adjusting bolt 7 props against the grid gasket 13 to move, the pre-tightening degree of the spring 5 is adjusted, the pressure difference value between the upper part and the lower part of the piston is changed, and the water injection pressure adjusting device.