CN210239978U

CN210239978U - Reciprocating type water injection pump head assembly

Info

Publication number: CN210239978U
Application number: CN201921103083.1U
Authority: CN
Inventors: Peiqing Jiang; 江培清
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-04-03
Anticipated expiration: 2029-07-15

Abstract

A reciprocating water injection pump head assembly. The utility model comprises a pump head body, a suction valve, a valve body and a discharge valve of a combined valve are fixedly connected and arranged in a horizontal through hole from left to right in sequence, and a pressing flange at the right end is fixedly arranged on the pump head body to axially fix the combined valve; the radial liquid inlet hole on the valve body communicates the liquid inlet hole of the pump head body with the liquid inlet channel of the suction valve, and the axial liquid inlet hole communicates the liquid discharge channel of the suction valve with the liquid inlet channel of the discharge valve; the two ends of the valve body are fixedly provided with static sealing rings made of hard alloy; the valve cores of the suction valve and the discharge valve are fixedly provided with combined type movable sealing rings, and the sealing surfaces of the static sealing ring and the combined type movable sealing rings are conical surfaces. The valve group has the advantages that the structural design is reasonable, the suction valve and the discharge valve are sealed by adopting a mode of combining hard alloy and non-metal materials and a hard alloy sealing ring, the sealing effect is effectively improved, the service life of the valve group is prolonged, the pump stopping maintenance frequency is reduced, and the oil extraction operation cost is reduced.

Description

Reciprocating type water injection pump head assembly

Technical Field

The utility model relates to a reciprocating type water injection pump for oil development production especially relates to a reciprocating type water injection pump head assembly, belongs to oil development machinery technical field, is applicable to reciprocating type plunger pump.

Background

Reciprocating pumps are widely used in oil fields, and are often used for delivering high viscosity, high density, high sand content, and highly corrosive liquids at high pressures. The different applications of the system are mainly a slurry pump, a well cementing pump, a fracturing pump, a water injection pump and the like, wherein the reciprocating water injection pump is used for injecting high-pressure water into an oil layer in a well to drive oil.

The pump head assembly of the reciprocating water injection pump comprises a pump head body, a combination valve, a liquid inlet flow channel, a pressing flange and a liquid drainage flow channel, wherein the combination valve is fixedly installed in the pump head body through the pressing flange, the liquid inlet flow channel and the liquid drainage flow channel are opened in an inner cavity of a valve body of the combination valve, a liquid drainage valve core and a liquid inlet valve core are respectively and tightly attached to a liquid drainage port and a liquid inlet of the combination valve body, and the volume of a compression cavity of the pump head body is continuously changed through the reciprocating motion of a plunger, so that liquid is continuously conveyed to. When the plunger moves backwards, the volume of the compression cavity of the pump head body is increased, the pressure is reduced, the liquid discharge valve core is closed, the liquid inlet valve core is opened, and liquid is sucked through the liquid inlet flow channel to finish the liquid suction process; when the plunger moves forwards, the volume of the pump head compression cavity is reduced, the pressure is increased, the liquid discharge valve core is opened, the liquid inlet valve core is closed, and liquid is discharged through the liquid discharge flow channel to finish the liquid discharge process. Reciprocating type water injection pump is continuous operation, and the valves is switched on and off hundreds of times per minute, because current valves hardness is low, and liquid is to the washing away of valves seal working face to and the case is to the striking of valve body, make the valves inefficacy very easily, need stop the pump maintenance, lead to water injection operation can not normally go on in succession, increase oil recovery operating cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome the valves hardness that current pump head body assembly exists and hang down, liquid is to the washing away of valves seal working face to and the case makes the valves inefficacy easily to the striking of valve body, leads to water injection operation normal clear not in succession, increases the not enough of oil recovery operation cost, the utility model provides a reciprocating type water injection pump head assembly.

The utility model provides a technical scheme that its technical problem adopted is: a reciprocating type water injection pump head assembly comprises a pump head body, an intake valve, a discharge valve and a pressing flange, wherein the pump head body is provided with a horizontal through hole, a liquid inlet hole and a liquid discharge hole, at least 4 stepped holes are formed in the horizontal through hole, the inner diameters of the holes are sequentially increased from left to right, and a combination valve is installed in the horizontal through hole.

The combination valve comprises a suction valve, a valve body and a discharge valve, wherein the suction valve, the valve body and the discharge valve are sequentially and fixedly connected and installed in the horizontal through hole from left to right, and the right end of the combination valve is fixedly installed on the pump head body and axially fixed with the combination valve through the compression flange.

The valve body is provided with a radial liquid inlet hole which communicates the liquid inlet hole of the pump head body with the liquid inlet channel of the suction valve; the valve body is provided with an axial liquid flow hole which communicates the liquid discharge channel of the suction valve with the liquid inlet channel of the discharge valve.

The two ends of the valve body are fixedly provided with static sealing rings made of hard alloy; and the valve cores of the suction valve and the discharge valve are fixedly provided with combined type movable sealing rings, and the sealing surfaces of the static sealing ring and the combined type movable sealing rings are conical surfaces.

Further, the combined type movable sealing ring comprises a movable sealing ring I and a movable sealing ring II, and the movable sealing ring I is arranged on the excircle of the movable sealing ring II; the material of the dynamic sealing ring I is polytetrafluoroethylene or polyurethane rubber, and the material of the dynamic sealing ring II is hard alloy.

The suction valve and the discharge valve are identical in structure, are respectively installed at two ends of the valve body and are installed in opposite directions.

The suction valve and the discharge valve comprise spring seats, valve cores and springs, the springs are coaxial with the valve cores, the springs are located between the inner bottom of the spring seats and axial directions of bosses on the circumference of the valve cores, and the valve cores slide along the axial directions of the spring seats. And one end of the valve core is fixedly provided with the combined type dynamic sealing ring.

The spring seat is in a sleeve shape, and a liquid flow hole is formed in the side wall of the spring seat; the valve core and the spring are positioned in the spring seat; and a locking bolt is fixedly arranged at the end part of the valve core and axially fixes the combined type movable sealing ring at the end part of the valve core.

The number of the radial liquid inlet holes and the axial liquid inlet holes on the valve body is 2 or more than 2, and the radial liquid inlet holes and the axial liquid inlet holes are uniformly distributed along the circumference.

Furthermore, the radial liquid inlet holes and the axial liquid outlet holes are staggered and alternately arranged on the circumference.

The conical angle of the matching surface of the static sealing ring and the combined type movable sealing ring is 90-150 degrees.

Preferably, the conical angle of the matching surfaces of the static sealing ring and the combined type dynamic sealing ring is 120 degrees.

The beneficial effects of the utility model are that, structural design is reasonable, and the mode of hard alloy, non-metallic material combination and carbide sealing ring is adopted in the sealed of suction valve, discharge valve, effectively improves sealed effect, and extension valves life reduces the pump shutdown maintenance number of times, and it is long when improving water injection operation continuous operation, reduces the oil recovery operation cost.

Drawings

Fig. 1 is a schematic structural view of a pump head assembly of a reciprocating water injection pump of the present invention.

Fig. 2 is a schematic structural diagram of the valve core of the present invention.

Fig. 3 is a front view of the valve body of the present invention.

Fig. 4 is a left side view of fig. 3.

Fig. 5 is a schematic view of the application structure of the present invention.

In the figure: 1. the pump head comprises a pump head body, 2 parts of a spring seat, 3 parts of a spring, 4 parts of a valve core, 5 parts of a movable sealing ring I, 6 parts of a movable sealing ring II, 7 parts of a horizontal through hole, 8 parts of a static sealing ring, 9 parts of a locking bolt, 10 parts of a valve body, 11 parts of a suction valve, 12 parts of a discharge valve, 13 parts of a pressing flange, 14 parts of a liquid discharge hole, 15 parts of an axial liquid flow hole, 16 parts of a stud bolt, 17 parts of a nut, 18 parts of a liquid inlet hole, 19 parts of a radial liquid inlet hole, 20 parts of a pump head assembly, 21 parts of a plunger packing box assembly and 22.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. However, it should be understood by those skilled in the art that the present invention is not limited to the specific embodiments listed, and should be included within the scope of the present invention as long as the spirit of the present invention is met.

See figure 1. The utility model relates to a reciprocating type water injection pump head assembly, including pump head body 1, combination valve, pump head body 1 is provided with 3 groups or 3 holes more than organizing, and every group hole includes the direct hole of level 7, feed liquor hole 18, outage 14, and the combination valve is installed in the direct hole of level 7, the combination valve includes valve body 10, suction valve 11, discharge valve 12. The liquid inlet hole 18 is communicated with the cavity of the suction valve 11, and the liquid outlet hole 14 is communicated with the cavity of the discharge valve 12. The arrows in fig. 1 indicate the direction of fluid flow of the water injection pump.

The horizontal straight-through hole 7 is at least provided with 4 stepped holes, the inner diameters of the stepped holes are sequentially increased from left to right, and a combination valve is installed in the horizontal straight-through hole 7.

The suction valve 11, the valve body 10 and the discharge valve 12 of the combined valve are fixedly connected and installed in the horizontal through hole 7 from left to right in sequence, specifically, a spring seat of the suction valve 11, a spring seat of the valve body 10 and a spring seat of the discharge valve 12 are fixedly connected from left to right in sequence, and the compression flange 13 at the right end is fixedly installed on the pump head body 1 to axially fix the combined valve; the pressing flange 13 is usually fixedly mounted on the pump head body 1 through stud bolts 16 and nuts 17.

The valve body 10 is provided with a radial liquid inlet hole 19 and an axial liquid outlet hole 15, and blind holes are formed in the centers of two ends of the valve body 10.

The radial liquid inlet hole 19 of the valve body 10 communicates the liquid inlet hole 18 of the pump head body 1 with the liquid inlet channel of the suction valve 11; the axial flow bore 15 of the valve body 10 connects the liquid discharge channel of the suction valve 11 with the liquid inlet channel of the discharge valve 12. One end of the radial liquid inlet hole 19 is communicated with the liquid inlet hole 18 of the pump head body 1, and the other end is positioned in the blind hole of the valve body 10 and is communicated with the liquid inlet channel of the suction valve 11.

The two ends of the valve body 10 are fixedly provided with static sealing rings 8 made of hard alloy; the valve body 10 and the static sealing ring 8 are usually arranged on the valve body 10 in an interference fit mode, and can also be arranged in an adhesive or other mode.

And combined movable sealing rings 22 are fixedly installed on the valve cores 4 of the suction valve 11 and the discharge valve 12, and sealing surfaces of the static sealing ring 8 and the combined movable sealing rings 22 are conical surfaces, so that the suction valve 11 and the discharge valve 12 can be smoothly opened and quickly closed in work.

Preferably, the conical angle of the matching surface of the static sealing ring 8 and the combined type movable sealing ring 22 is 90-150 degrees, and when the conical angle of the matching surface of the static sealing ring 8 and the combined type movable sealing ring 22 is 120 degrees, the sealing effect is better.

The combined type movable sealing ring 22 comprises a movable sealing ring I5 and a movable sealing ring II 6, wherein the movable sealing ring I5 is arranged on the excircle of the movable sealing ring II 6; the material of the dynamic sealing ring I5 is polytetrafluoroethylene or polyurethane rubber, and the material of the dynamic sealing ring II 6 is hard alloy (see attached figure 2).

The suction valve 11 and the discharge valve 12 have the same structure, and are respectively fixedly installed at both ends of the valve body 10 and installed in opposite directions. In practical application, the sizes of the suction valve 11 and the discharge valve 12 can be adjusted appropriately according to the process requirements of the conveying medium.

The suction valve 11 and the discharge valve 12 comprise a spring seat 2, a valve core 4 and a spring 3, and the spring 3 is coaxial with the valve core 4. The spring seat 2 is in a sleeve shape, and a liquid flow hole is formed in the side wall of the spring seat; the valve core 4 and the spring 3 are positioned in the spring seat 2, and the spring 3 is positioned between the bottom in the spring seat 2 and the axial direction of the circumferential boss of the valve core 4.

The spool 4 slides axially along the spring seat 2. The valve core 4 is a stepped shaft, and the small shaft diameter and the large circumferential shaft diameter (boss) of the valve core 4 are in clearance fit with the inner hole of the spring seat 2 and axially slide.

One end of the valve core 4 slides along the bottom through hole of the spring seat 2, and the other end is fixedly provided with the combined type movable sealing ring 22.

And a locking bolt 9 is fixedly installed at the end part of the valve core 4, and the combined type movable sealing ring 22 is axially fixed at the end part of the valve core 4 by the locking bolt 9.

See fig. 3 and 4. The number of the radial liquid inlet holes 19 and the axial liquid outlet holes 15 on the valve body 10 is 2 or more than 2, and the radial liquid inlet holes and the axial liquid outlet holes are uniformly distributed along the circumference; preferably, the number of the radial liquid inlet holes 19 and the number of the axial liquid outlet holes 15 are 3-6.

Typically the number of radial inlet openings 19 and axial flow openings 15 is equal. Preferably, the number of the radial liquid inlet holes 19 and the number of the axial liquid outlet holes 15 are 5. The radial liquid inlet holes 19 and the axial liquid outlet holes 15 are circumferentially staggered and alternately arranged.

The utility model discloses still another technical scheme, when carrying high viscosity liquid, it only uses the material to be carbide's movable sealing ring II 6 to move the sealing ring, the sealed face that moves sealing ring II 6 is the sphere, can reduce the resistance when the valves is opened and is closed, reduces the viscosity loss of liquid in transportation process simultaneously, improves the pump efficiency.

See fig. 5. The utility model relates to an application of reciprocating type water injection pump head assembly installs plunger packing box assembly 21 in the outside of the pump head body 1 suction valve of pump head assembly 20.

When the plunger moves to the left, the discharge valve 12 at the right end of the combination valve is closed; meanwhile, the suction valve 11 at the left end is opened, and liquid enters the left chamber of the pump head body 1 and the chamber of the plunger packing box assembly 21 from the liquid inlet hole 18;

when the plunger moves to the right, the suction valve 11 at the left end of the combination valve is closed; meanwhile, the discharge valve 12 at the right end is opened, and the liquid enters the right chamber of the pump head body 1 from the left chamber of the pump head body 1 through the valve body 10 and is discharged through the liquid discharge hole 14 of the pump head to complete a working process;

the above process is continuously circulated to complete the water injection operation.

The utility model relates to a reciprocating type water injection pump head assembly not only is applicable to the water injection pump, also is applicable to other reciprocating type plunger pumps equally, if: slurry pumps, cementing pumps, fracturing pumps, and the like.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims.

Claims

1. The utility model provides a reciprocating type water injection pump head assembly, includes pump head body, suction valve, bleeder valve, hold-down flange, and the pump head body is provided with straight hole of level, feed liquor hole, outage, characterized by:

at least 4 stepped holes are formed in the horizontal through hole, the inner diameter of each stepped hole is sequentially increased from left to right, and a combination valve is installed in the horizontal through hole;

the combined valve comprises a suction valve, a valve body and a discharge valve, the suction valve, the valve body and the discharge valve are sequentially and fixedly connected and installed in the horizontal through hole from left to right, the compression flange at the right end is fixedly installed on the pump head body, and the combined valve is axially fixed;

the valve body is provided with a radial liquid inlet hole which communicates the liquid inlet hole of the pump head body with the liquid inlet channel of the suction valve;

the valve body is provided with an axial liquid flow hole which communicates a liquid discharge channel of the suction valve with a liquid inlet channel of the discharge valve;

2. The reciprocating water injection pump head assembly of claim 1, wherein: the combined type dynamic sealing ring comprises a dynamic sealing ring I and a dynamic sealing ring II, and the dynamic sealing ring I is arranged on the outer circle of the dynamic sealing ring II;

the material of the dynamic sealing ring I is polytetrafluoroethylene or polyurethane rubber, and the material of the dynamic sealing ring II is hard alloy.

3. The reciprocating water injection pump head assembly of claim 2, wherein:

the suction valve and the discharge valve have the same structure, are respectively arranged at two ends of the valve body and are arranged oppositely;

the suction valve and the discharge valve comprise spring seats, valve cores and springs, the springs are coaxial with the valve cores, the springs are positioned between the inner bottom of the spring seats and the axial direction of the circumferential bosses of the valve cores, and the valve cores slide along the axial direction of the spring seats;

and one end of the valve core is fixedly provided with the combined type dynamic sealing ring.

4. The reciprocating water injection pump head assembly of claim 3, wherein: the spring seat is in a sleeve shape, and a liquid flow hole is formed in the side wall of the spring seat; the valve core and the spring are positioned in the spring seat;

and a locking bolt is fixedly arranged at the end part of the valve core and axially fixes the combined type movable sealing ring at the end part of the valve core.

5. The reciprocating water injection pump head assembly of claim 4, wherein: the number of the radial liquid inlet holes and the axial liquid outlet holes on the valve body is 2 or more than 2, and the radial liquid inlet holes and the axial liquid outlet holes are uniformly distributed along the circumference;

the radial liquid inlet holes and the axial liquid outlet holes are staggered and alternately arranged on the circumference.

6. A pump head assembly for a reciprocating water injection pump according to any one of claims 1 to 5, wherein: the conical angle of the matching surface of the static sealing ring and the combined type movable sealing ring is 90-150 degrees.

7. The reciprocating water injection pump head assembly of claim 6, wherein: the conical angle of the matching surface of the static sealing ring and the combined type dynamic sealing ring is 120 degrees.