CN213511162U

CN213511162U - Novel hydraulic end

Info

Publication number: CN213511162U
Application number: CN202022532661.2U
Authority: CN
Inventors: 韦品荣
Original assignee: Huangshan Huirun Machinery Co ltd
Current assignee: Huangshan Huirun Machinery Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-06-22
Anticipated expiration: 2030-11-05

Abstract

The utility model discloses a novel hydraulic end, which relates to the technical field of oilfield fracturing equipment and comprises a valve box, wherein the valve box is provided with a liquid inlet channel and a liquid outlet channel which are both conical, a liquid inlet valve and a liquid outlet valve are respectively arranged in the liquid inlet channel and the liquid outlet channel, a valve seat of the liquid inlet valve and a valve seat of the liquid outlet valve are both conical, the conicity of the valve seats is respectively the same as that of the liquid inlet channel and the liquid outlet channel, and the two valve seats are respectively in clearance fit with the liquid inlet channel and the liquid outlet channel; the utility model discloses the disk seat of well feed liquor valve, flowing back valve adopts tapered clearance fit with inlet channel, flowing back passageway respectively, can make the change installation of feed liquor valve, flowing back valve become very convenient, can obviously shorten the dismouting time, and then improve the operation progress.

Description

Novel hydraulic end

Technical Field

The utility model relates to an oil field fracturing equipment technical field especially relates to a novel hydraulic end.

Background

The valve assembly is the main vulnerable part of the hydraulic end of the traditional plunger pump. The traditional valve comprises a valve rubber, a valve body, a valve seat and an O-shaped sealing ring, and the consumption cost of the oil field drilling fracturing operation is directly influenced by the overall comprehensive performance of the valve assembly. However, the valve bears the scouring and erosion of high-pressure fluid (acidizing, quartz sand and the like) for a long time during operation, so that the working environment is very severe, working surfaces of the valve body, the valve seat and the valve rubber are scoured, abraded and eroded by the high-pressure fluid medium for a long time, failure is easily caused, the conical surface of the valve body directly impacts the conical surface (the working surface) of the valve seat due to the failure of the valve rubber buffer seal, a hard layer is broken or cracked and damaged, and meanwhile, the service life of the valve seat is shortened due to the uneven hardness of the carburized hard layer of the valve seat. Therefore, the valve body and the valve rubber are usually replaced completely when the service life of the valve body and the valve rubber reaches about 20 hours, the valve seat and the O-shaped ring are replaced completely when the service life of the valve seat and the O-shaped ring reaches about 40 hours, the cost is very high, the replacement and installation are inconvenient, and the progress of drilling and fracturing operation is directly influenced.

The utility model patent with the application number of '201920010825. X' and the name of 'a valve' discloses a valve with novel structure, can obviously prolong the life of valve. However, the valve seats of the valve and the traditional valve in the patent are both cylindrical, and are only in clearance fit with the liquid inlet channel and the liquid discharge channel of the valve box, and during clearance fit, replacement and installation are inconvenient, and the progress of drilling fracturing operation can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel fluid end to solve the problem that prior art exists, the more convenient novel fluid end is installed with the change of flowing back valve to the feed liquor valve.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a novel hydraulic end, including the valve box, be provided with on the valve box and all be conical inlet channel and flowing back passageway, inlet channel be provided with feed liquor valve and flowing back valve in the flowing back passageway respectively, the disk seat of feed liquor valve and the disk seat of flowing back valve all is the toper, and the tapering is the same with the tapering of inlet channel, flowing back passageway respectively, two the disk seat respectively with inlet channel, flowing back passageway clearance fit.

Preferably, two all offer the recess that is used for placing the sealing washer on the disk seat.

Preferably, the liquid inlet channel and the liquid discharge channel have the same taper.

Preferably, the taper of the liquid inlet channel and the taper of the liquid discharge channel are both 1: 16.

Preferably, the liquid inlet valve and the liquid outlet valve have the same structure and respectively comprise a valve seat, a valve body and a valve cover, the bottom of the valve seat is provided with a suction inlet, the bottom end inside the valve seat is provided with a valve rubber sheet, the valve body is arranged above the valve rubber sheet, and the bottom end surface of the valve body is a spherical surface; the valve cover is sleeved on the outer side of the valve body and connected with the top of the valve seat, the valve body can slide in the inner cavity of the valve cover, a plurality of liquid discharge grooves are formed in the valve cover, and in a normal state, the spherical surface is in contact with the valve rubber and blocks the liquid discharge grooves.

Preferably, the bottom end of the valve body is provided with an inward concave circular surface, and the inward concave circular surface is opposite to the suction inlet.

Preferably, the suction inlet is in the shape of an inverted cone.

Preferably, the liquid discharge groove is obliquely arranged from bottom to top.

Preferably, the valve cover is in threaded connection with the top end of the valve seat, and a plane gasket is arranged between the valve cover and the valve rubber.

Preferably, a buffer rubber pad is arranged between the valve cover and the valve body.

The utility model discloses for prior art gain following technological effect:

the liquid inlet channel and the liquid discharge channel are set to be conical, and the liquid discharge valve and the valve seat of the liquid inlet valve are set to be conical, so that the valve seat can be easily placed into the liquid inlet channel or the liquid discharge channel, and the installation is more convenient; when dismantling, the effort is applyed to the disk seat in the opposite direction, can take out flowing back valve or feed liquor valve after the disk seat is not hard up, and it is also more convenient to dismantle, so, the utility model discloses the disk seat of well feed liquor valve, flowing back valve adopts the clearance fit who takes tapering with inlet channel, flowing back passageway respectively, can make the change installation of feed liquor valve, flowing back valve become very convenient, can obviously shorten the dismouting time, and then improve the operation progress.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of a middle hydraulic end of the present invention;

FIG. 2 is a schematic structural view of a liquid inlet valve and a liquid outlet valve of the present invention;

wherein, 1, a valve box; 2. a liquid inlet valve; 3. a drain valve; 4. a seal ring; 5. a valve seat; 6. a valve body; 7. a valve cover; 8. a suction inlet; 9. valve rubber; 10. a liquid discharge tank; 11. a concave circular surface; 12. a planar washer; 13. a cushion rubber pad; 14. pressing the pressing cap; 15. discharging the blanking cap; 16. pressing the pressing cap downwards; 17. a suction blanking cover; 18. an L-shaped limiting frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

This embodiment provides a novel fluid end, including valve box 1, be provided with on the valve box 1 and all be conical inlet channel and flowing back passageway, be provided with feed liquor valve 2 and flowing back valve 3 in inlet channel, the flowing back passageway respectively, and the disk seat 5 of feed liquor valve 2 and the disk seat 5 of flowing back valve 3 all are the toper, and the tapering is the same with inlet channel, flowing back passageway's tapering respectively, and two disk seats 5 respectively with inlet channel, flowing back passageway clearance fit.

In the embodiment, the liquid inlet channel and the liquid outlet channel are set to be conical, the valve seats 5 of the liquid outlet valve 3 and the liquid inlet valve 2 are set to be conical with the conicity equal to that of the liquid outlet channel and the liquid inlet channel respectively, and the valve seats 5 are conical, and the diameters of the end parts of the valve seats are smaller than that of the channel openings, so that the valve seats are more easily and stably placed in the liquid inlet channel or the liquid outlet channel, and further the liquid outlet valve 3 or the liquid inlet valve 2 is pressed, so that the valve seats can be firmly installed, the installation process is simpler, and the use; during the dismantlement, the effort is applyed to disk seat 5 in the opposite direction, can take out flowing back valve 3 or feed liquor valve 2 after disk seat 5 is not hard up, and it is also more convenient to dismantle, so, feed liquor valve 2 in this embodiment, flowing back valve 3's disk seat 5 respectively with inlet channel, flowing back passageway adopt take tapered clearance fit, can make the change installation of feed liquor valve 2, flowing back valve 3 become very convenient, can obviously shorten the dismouting time, and then improve the operation progress.

Further, the taper of the liquid inlet channel and the taper of the liquid discharge channel in the embodiment are the same, and are both 1:16, and of course, those skilled in the art can design other taper parameters according to actual situations.

In order to realize sealing, grooves for placing the sealing rings 4 are formed in the two valve seats 5.

Fig. 1 is a hydraulic end of a plunger pump, a discharge blanking cover 15, an upper pressing cap 14, a suction blanking cover 17 and a lower pressing cap 16 are further arranged on a valve box 1, an L-shaped limiting frame 18 is further fixed on the lower suction blanking cover 17, a right-angle surface of the L-shaped limiting frame 18 is fixed on the suction blanking cover 17, and the other right-angle surface is located above a liquid inlet valve 2, so that the influence on the normal operation of the plunger after the liquid inlet valve 2 is loosened is prevented, and workpieces are prevented from being damaged; the discharge block cover 15, the upper pressing cap 14, the suction block cover 17, the lower pressing cap 16, and other components are common parts of the valve housing 1, and therefore, the structure thereof will not be described in detail.

Further, as shown in fig. 2, the liquid inlet valve 2 and the liquid outlet valve 3 have the same structure, and each of the liquid inlet valve 2 and the liquid outlet valve 3 includes a valve seat 5, a valve body 6 and a valve cover 7, a suction inlet 8 is formed at the bottom of the valve seat 5, a valve rubber 9 is arranged at the bottom end inside the valve seat 5, the valve body 6 is arranged above the valve rubber 9, and the bottom end surface of the valve body 6 is a spherical surface; the valve cover 7 is sleeved on the outer side of the valve body 6 and connected with the top of the valve seat 5, the valve body 6 can slide in an inner cavity of the valve cover 7, the valve cover 7 is provided with a plurality of liquid discharge grooves 10, and in a normal state, the spherical surface is in contact with the valve rubber 9 and blocks the liquid discharge grooves 10.

When the valve box works, the plunger in the valve box 1 moves rightwards, fluid enters from a suction port 8 at the bottom of the liquid inlet valve 2 under the action of negative pressure to push the valve body 6 upwards to be opened, the fluid enters the valve box 1 from a liquid discharge groove 10, after the plunger stops moving and liquid inlet is finished, the valve body 6 slides downwards and is closed under the action of the internal pressure of the valve box 1, and at the moment, the spherical surface at the bottom end of the valve body 6 and a valve rubber 9 form buffering and sealing under the action of pressure; when the plunger moves leftwards, the fluid pressure is increased, the valve body 6 in the drain valve 3 is pushed upwards and flows out through the drain groove 10 on the drain valve 3, and when the fluid pressure in the valve box 1 is reduced to a certain degree, the valve body 6 falls under the action of the dead weight, and the suction port 8 of the drain valve 3 is sealed.

Because the bottom of the valve body 6 is a spherical surface, the impact force of the fluid on the valve body is small, in order to increase the pressure effect of the liquid on the valve body 6, the bottom end of the valve body 6 is provided with an inner concave circular surface 11, and the inner concave circular surface 11 is opposite to the inverted conical suction inlet 8; when fluid impacts the bottom of the valve body 6, greater thrust is applied to the valve body 6 through the concave circular surface 11, and the opening difficulty of the valve body 6 is reduced.

In order to facilitate the fluid to be discharged from the liquid discharge tank 10, the liquid discharge tank 10 is disposed obliquely from bottom to top in this embodiment; further, the valve cover 7 is in threaded connection with the top end of the valve seat 5, and a plane gasket 12 is arranged between the valve cover 7 and the valve rubber 9.

Further, be provided with buffering cushion 13 between valve gap 7 and the valve body 6, buffering cushion 13 is when compressed by valve body 6, applys decurrent elasticity to valve body 6, then can prevent that valve body 6 from striking valve gap 7 repeatedly, reduces valve gap 7's life, then when pressure reduces in 1 cavity of valve box, valve body 6 can fall back rapidly under the effort of dead weight and buffering cushion 13, improves valve body 6's response speed.

The adaptability that carries out according to actual demand all is in the protection scope of the utility model.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a novel fluid end, its characterized in that, includes the valve box, be provided with all to be conical inlet channel and flowing back passageway on the valve box, inlet channel be provided with feed liquor valve and flowing back valve in the flowing back passageway respectively, the disk seat of feed liquor valve and the disk seat of flowing back valve all is the toper, and the tapering is the same with inlet channel, flowing back passageway's tapering respectively, two the disk seat respectively with inlet channel, flowing back passageway clearance fit.

2. The novel fluid end of claim 1 wherein both of the valve seats are formed with grooves for receiving sealing rings.

3. The novel fluid end of claim 1 wherein the inlet channel and the discharge channel are of the same taper.

4. The novel fluid end of claim 3 wherein the inlet channel and the discharge channel are tapered at a ratio of 1: 16.

5. The novel hydraulic end as claimed in any one of claims 1 to 4, wherein the liquid inlet valve and the liquid outlet valve are the same in structure and each comprise a valve seat, a valve body and a valve cover, the bottom of the valve seat is provided with a suction inlet, the bottom end inside the valve seat is provided with a valve rubber, the valve body is arranged above the valve rubber, and the bottom end surface of the valve body is spherical; the valve cover is sleeved on the outer side of the valve body and connected with the top of the valve seat, the valve body can slide in the inner cavity of the valve cover, a plurality of liquid discharge grooves are formed in the valve cover, and in a normal state, the spherical surface is in contact with the valve rubber and blocks the liquid discharge grooves.

6. The new fluid end as set forth in claim 5 wherein said valve body bottom end is provided with a concave circular surface facing said suction port.

7. The novel fluid end as set forth in claim 6 wherein said suction inlet is of an inverted cone shape.

8. The new fluid tip as claimed in claim 5, wherein the drain channel is disposed inclined outwardly from bottom to top.

9. The novel fluid end as claimed in claim 5, wherein the valve cover is in threaded connection with the top end of the valve seat, and a planar gasket is disposed between the valve cover and the valve rubber.

10. The novel fluid end as claimed in claim 5, wherein a cushion rubber pad is further disposed between the valve cover and the valve body.