CN115163480A - High-precision fracturing pump valve seat and preparation process thereof - Google Patents
High-precision fracturing pump valve seat and preparation process thereof Download PDFInfo
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- CN115163480A CN115163480A CN202210857380.5A CN202210857380A CN115163480A CN 115163480 A CN115163480 A CN 115163480A CN 202210857380 A CN202210857380 A CN 202210857380A CN 115163480 A CN115163480 A CN 115163480A
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- valve seat
- seat body
- polishing
- grinding
- fracturing pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/12—Devices for exhausting mist of oil or coolant; Devices for collecting or recovering materials resulting from grinding or polishing, e.g. of precious metals, precious stones, diamonds or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a high-precision fracturing pump valve seat and a preparation process thereof, and relates to the technical field of valve seat processing. The invention is used for solving the technical problems that the assembly precision and the compression resistance of the fracturing pump valve seat are required to be improved, and the inner wall of the fracturing pump valve seat cannot be polished with high efficiency and high regulation and control sensitivity during preparation; when the valve seat shakes under the action of external force, the anti-pressure ring has the functions of bearing pressure and relieving stress, and the sealing ring has the functions of sealing and relieving vibration; the anti-pressure ring is in contact fit with the sealing ring, so that the assembly precision and the anti-pressure performance of the valve seat of the fracturing pump are improved, and the service life of the valve seat of the fracturing pump is prolonged; the inner wall of the valve seat body is polished in an adjustable direction and speed, so that the polishing efficiency and the regulation sensitivity of the valve seat body are improved, and the polishing energy consumption is saved.
Description
Technical Field
The invention relates to the technical field of valve seat processing, in particular to a high-precision fracturing pump valve seat and a preparation process thereof.
Background
The valve seat is matched with the valve body assembly in a hydraulic end valve box of the fracturing pump for use, an inner taper hole in the valve box is matched with an outer taper surface of the valve seat to play a role of hard sealing, a sealing groove is formed in the outer taper surface of the valve seat and is provided with a sealing ring to play a role of soft sealing, the inner taper surface of the valve seat is matched and sealed with rubber of the valve body assembly, and the functions of sucking and discharging fluid in the operation process of the fracturing pump are realized through the up-down opening and closing of the valve body assembly.
The processing method of the valve seat is generally round steel blanking, drilling, semi-finishing appearance, carburizing and quenching, surface sand blasting, external conical surface grinding and internal conical surface grinding at present. The new process method and device for processing the valve seat disclosed in the prior art (CN 114310666A) comprise a mounting frame, a self-adaptive support device and an automatic positioning seat, wherein the automatic positioning seat comprises a mounting plate, a mounting seat and a pressing plate, a plurality of fixing seats are installed on the outer side of the automatic positioning seat, telescopic positioning support rods are installed in convex telescopic grooves of the fixing seats, each positioning support rod is driven to be telescopic by corresponding convex oil pushing rods through hydraulic oil, when the pressing plate is pushed, each convex oil pushing rod synchronously runs, therefore, the telescopic amount of each positioning support rod is the same, after the valve seat shell is sleeved on the automatic positioning seat, when the pressing plate is pushed by the telescopic oil pushing rods of the self-adaptive support device, each positioning support rod supports and positions the valve seat shell, so that the central line of the positioning rod and the central line of the automatic positioning seat are positioned on the same straight line, and the precision and efficiency of polishing processing can be effectively improved. However, researches find that the existing fracturing pump valve seat and the preparation process thereof have the following technical problems: the assembly precision and the pressure resistance of the fracturing pump valve seat need to be improved, and the inner wall of the fracturing pump valve seat cannot be polished with high efficiency and high regulation and control sensitivity during preparation.
Disclosure of Invention
The invention aims to provide a high-precision fracturing pump valve seat and a preparation process thereof, and aims to solve the technical problems that in the prior art, the assembly precision and the compression resistance of the fracturing pump valve seat need to be improved, and the inner wall of the fracturing pump valve seat cannot be polished with high efficiency and high regulation and control sensitivity during preparation.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a high-precision fracturing pump valve seat which comprises a centering frame, a torsion spring, a guide rod, an occlusion disc, a guide claw and a valve seat body, wherein the guide rod and the guide claw are integrally formed at the top and the bottom of the occlusion disc, the guide rod is inserted from the bottom of the centering frame and then is tightly pressed and assembled through the torsion spring, the outer surface of the occlusion disc is assembled with an inner cavity of the valve seat body, the occlusion disc comprises a top large disc, a middle small disc, a transition disc and an assembling disc which are sequentially arranged from top to bottom, the valve seat body comprises a main seat body with a cavity inside, a compression ring groove is arranged below the periphery of the main seat body close to the lower part, a sealing ring groove is arranged on the outer surface of the compression ring groove, the main seat body is assembled with a fracturing pump valve box through a compression ring embedded into the compression ring groove and a sealing ring embedded into the sealing ring groove, and the compression ring is contacted with the sealing ring.
Further, the cross-sectional area of the top large disc is larger than that of the middle small disc and the transition disc, and the transition disc has a slope of 20-30 degrees extending towards the lower inner part; the outer surface of the assembling disc is provided with a first flange, a second flange and a bottom flange which are convex outwards from top to bottom; the inner surface of the main seat body is provided with a first concave edge and a second concave edge which are concave inwards from top to bottom, and the upper surface of the inner cavity of the main seat body is provided with a slope which extends upwards and outwards and is 20-30 degrees.
Furthermore, a first O-shaped ring is installed in a gap formed by assembling the first flange and the first concave edge in an adaptive mode, a second O-shaped ring is installed in a gap formed by assembling the second flange and the second concave edge in an adaptive mode, and an inclined sealing ring is installed in a gap formed by assembling the upper surface of the inner cavity of the main seat body and the transition disc in an adaptive mode.
The invention also provides a preparation process of the high-precision fracturing pump valve seat, which comprises the following steps:
s1, die forging of a blank: selecting 20CrMnTi low-carbon alloy steel, and forging by adopting a die forging mode to obtain a valve seat body crude product;
s2, heat treatment: heating the crude product of the valve seat body to 940-955 ℃, preserving the heat for 1-2 hours, and cooling to obtain a heat-treated valve seat body;
s3, fine machining: machining an inclination angle, a compression ring groove, a sealing ring groove, a first concave edge and a second concave edge by using a numerical control machine tool to obtain a finish machining valve seat body;
s4, sand blasting: under the conditions that the air pressure is 0.8-1.2 MPa and the sand blasting included angle is 30-45 degrees, adopting 80-100 meshes of brown emery to perform sand blasting treatment on the finish-machined valve seat body to obtain a sand blasting valve seat body;
s5, polishing: after the outer wall of the sand blasting valve seat body is polished, polishing equipment is adopted to polish and polish the inner wall of the sand blasting valve seat body, and a polished valve seat body is obtained;
s6, assembling: inserting a guide rod from the bottom of a centering frame, then pressing and assembling the guide rod through a torsion spring, inserting an occlusion disc into an inner cavity of a valve seat body, installing a first O-shaped ring in a gap formed by assembling a first flange and a first concave edge in a matched mode, installing a second O-shaped ring in a gap formed by assembling a second flange and a second concave edge in a matched mode, and installing an inclined sealing ring in a gap formed by assembling the upper surface of the inner cavity of a main seat body and a transition disc in a matched mode to obtain a finished valve seat product; and the finished product of the valve seat is assembled with the fracturing pump valve box through a pressure resistant ring embedded in the pressure resistant ring groove and a sealing ring embedded in the sealing ring groove.
Further, adopt burnishing and polishing equipment to carry out the specific process of polishing and polishing to the inner wall of sandblast valve seat body does: placing a plurality of sand blasting valve seat bodies in valve seat clamping grooves of a station rotating table; a second speed reducing motor is started, and the second speed reducing motor drives the connecting shaft and the station rotating table to rotate, so that one sandblasting valve seat body is close to the clamping jaw; the telescopic cylinder drives the piston rod to extend, the clamping jaw clamps the outer wall of the sand blasting valve seat body after being opened, and the piston rod drives the clamping jaw to further extend to enable the polishing head to enter the inner cavity of the sand blasting valve seat body; the first speed reducing motor drives the rotating shaft to rotate, and the rotating shaft drives the driving bevel gear on the periphery of the rotating shaft to rotate; the driving bevel gear drives the first driven bevel gear and the second driven bevel gear to synchronously and reversely rotate, and the first driven bevel gear and the second driven bevel gear respectively drive the first driven rod and the second driven rod to rotate, so that two polishing heads at the tail ends synchronously rotate, polish and polish; the piston rod drives the clamping jaw to contract, and the clamping jaw is opened to enable the polished valve seat body to fall into the valve seat clamping groove; the second gear motor drives the station rotating table to rotate, the polishing valve seat body rotates to a position close to the elastic corrugated pipe, and the polishing valve seat body falls into the material containing barrel through the elastic corrugated pipe to be collected.
Furthermore, the grinding and polishing equipment comprises a base, a multi-station positioning and clamping mechanism and a driving grinding mechanism, wherein the driving grinding mechanism is arranged above the base, and the two multi-station positioning and clamping mechanisms are symmetrically arranged at two sides of the driving grinding mechanism; the drive grinding mechanism comprises a grinding box, a first speed reduction motor and a grinding head, the grinding box is arranged above the base, an installation column is connected between the center of the bottom of the grinding box and the top of the base, support columns are symmetrically arranged on two sides of the installation column, the first speed reduction motor is arranged in an inner cavity of the base, and a motor shaft of the first speed reduction motor is connected with a rotating shaft which runs through the installation column to an inner cavity of the grinding box.
Furthermore, a first limit bearing is arranged on the periphery of the rotating shaft and positioned at the top of the inner cavity of the mounting column, a second limit bearing is arranged on the periphery of the rotating shaft and positioned at the top of the inner cavity of the polishing box, a driving bevel gear is connected to the periphery of the rotating shaft and positioned at the inner cavity of the polishing box, and a first driven bevel gear and a second driven bevel gear are respectively meshed with the tops of two sides of the driving bevel gear; the first driven bevel gear is connected with a first driven rod horizontally extending out of one side of the polishing box, the second driven bevel gear is connected with a second driven rod horizontally extending out of the other side of the polishing box, and the tail ends of the first driven rod and the second driven rod can be detachably connected with a polishing head.
Furthermore, the multi-station positioning and clamping mechanism comprises a positioning and clamping box, material containing barrels and an L-shaped mounting plate, wherein the L-shaped mounting plates are symmetrically arranged at two sides of the base; the bottom of L shape mounting panel is equipped with second gear motor, and second gear motor is connected with and runs through L shape mounting panel and extend to the connecting axle in the location centre gripping case cavity, and the top of connecting axle is connected with the station revolving stage.
Furthermore, the cross section of the station rotating platform is circular, a plurality of valve seat clamping grooves are distributed in the outer edge of the station rotating platform in an annular array mode, a telescopic cylinder which does not rotate along with the station rotating platform is fixedly arranged inside the station rotating platform, a piston rod in an inner cavity of the telescopic cylinder horizontally extends towards the outer edge of the station rotating platform, and the tail end of the piston rod is connected with a clamping jaw which is used for clamping, taking and placing the valve seat body; a polishing cavity for the clamping jaw to extend out is formed in the positioning clamping box, an extension spring is wound on the periphery of the piston rod, and the central axis of the telescopic cylinder is superposed with the central axis of the polishing head; an elastic corrugated pipe is connected between the material containing barrel and the bottom of the positioning clamping box.
The invention has the following beneficial effects:
1. according to the invention, the compression ring is embedded into the compression ring groove at the periphery of the valve seat body, and then the sealing ring is embedded into the sealing ring groove, so that the valve seat body and the fracturing pump valve box are tightly assembled; when the valve seat shakes under the action of external force, the anti-pressure ring is combined to play a role in bearing and relieving stress, and the sealing ring plays a role in sealing and relieving vibration; the anti-pressure ring is in contact fit with the sealing ring, so that the assembly precision and the pressure resistance of the fracturing pump valve seat are improved, and the service life of the fracturing pump valve seat is prolonged.
2. The plurality of flanges arranged on the outer surface of the assembling disc and the plurality of concave edges arranged on the inner surface of the main seat body are matched with the first O-shaped ring, the second O-shaped ring and the inclined sealing ring, so that the assembling disc and the main seat body are favorable for multi-sealing assembly, the sealing property and the compression resistance of the inner cavity of the main seat body in the working process of the fracturing pump valve box are maintained, the compression resistance of the fracturing pump valve seat is further improved, and the service life of the fracturing pump valve seat is further prolonged.
3. The preparation process comprises the steps of die forging of a blank, heat treatment, finish machining, sand blasting, grinding and assembling, wherein in the grinding step, the inner wall of a sand blasting valve seat body is polished and ground through grinding and polishing equipment, the inner wall of the valve seat body is ground and polished in an adjustable direction and speed by controlling the forward and reverse rotating speeds of a first speed reducing motor, the grinding and polishing efficiency and the regulation and control sensitivity of the valve seat body are improved, synchronous grinding of two grinding heads is realized through one speed reducing motor, and the grinding energy consumption is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 the drawings without creative efforts.
FIG. 1 is an exploded view of a high precision frac pump valve seat of the present invention;
FIG. 2 is a cross-sectional view of the valve seat body of the present invention;
FIG. 3 is a cross-sectional view of the assembled valve seat body and bite plate of the present invention;
FIG. 4 is a front view of the grinding and polishing device for the fracturing pump valve seat of the present invention;
FIG. 5 is a schematic diagram of the internal structure of the grinding and polishing device for the fracturing pump valve seat;
FIG. 6 is an enlarged view of a portion of FIG. 5 at A;
FIG. 7 is a partial enlarged view of the portion B in FIG. 5;
FIG. 8 is a top view of the multi-station positioning fixture of the present invention;
fig. 9 is a schematic structural view of the sanding head of the present invention.
Reference numerals are as follows: 1. a righting frame; 2. a torsion spring; 3. a guide rod; 4. an occlusion disk; 5. a guide claw; 6. a valve seat body; 10. a machine base; 11. a scrap removing box; 12. a vacuum pump; 13. a scrap removal bag; 14. a scrap removal pipe; 15. a scrap suction pipe; 16. a scrap collecting hopper; 20. a multi-station positioning and clamping mechanism; 21. positioning the clamping box; 22. a material containing barrel; 23. an L-shaped mounting plate; 24. a second reduction motor; 25. a connecting shaft; 26. a station rotating table; 27. an elastic bellows; 30. driving the polishing mechanism; 31. grinding the box; 32. a first reduction motor; 33. polishing head; 34. mounting a column; 35. a support pillar; 36. a rotating shaft; 37. a driving bevel gear; 38. a first driven bevel gear; 39. a second driven bevel gear; 41. a top large plate; 42. a middle small disc; 43. a transition disk; 44. assembling a disc; 45. a first flange; 46. a second flange; 47. a bottom flange; 48. a first driven lever; 49. a second driven lever; 61. a main base body; 62. a compression ring groove; 63. a seal ring groove; 64. a first recessed edge; 65. a second recessed edge; 66. a first O-ring; 67. a second O-ring; 68. an inclined sealing ring; 261. a valve seat clamping groove; 262. a telescopic cylinder; 263. a piston rod; 264. a clamping jaw; 265. an extension spring; 331. mounting a rod; 332. grinding disc; 333. a conical head; 334. a compression spring; 361. a first limit bearing; 362. and a second limit bearing.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-3, the embodiment provides a high-precision fracturing pump valve seat, which includes a centering frame 1, a torsion spring 2, a guide rod 3, a meshing disc 4, a guide claw 5 and a valve seat body 6, wherein the guide rod 3 and the guide claw 5 are integrally formed at the top and the bottom of the meshing disc 4, the guide rod 3 is pressed and assembled through the torsion spring 2 after being inserted from the bottom of the centering frame 1, and the outer surface of the meshing disc 4 is assembled with the inner cavity of the valve seat body 6. The occlusion disc 4 comprises a top large disc 41, a middle small disc 42, a transition disc 43 and an assembly disc 44 which are sequentially arranged from top to bottom, the valve seat body 6 comprises a main seat body 61 with a cavity inside, a pressure ring resistant groove 62 is arranged near the periphery of the main seat body 61 and below the main seat body, a sealing ring groove 63 is arranged on the outer surface of the pressure ring resistant groove 62, the main seat body 61 is assembled with the fracturing pump valve box through a pressure ring embedded in the pressure ring resistant groove 62 and a sealing ring embedded in the sealing ring groove 63, and the pressure ring is in contact with the sealing ring. The pressure resistant ring is made of alloy materials, and the sealing ring is made of rubber materials.
When the fracturing pump valve seat is assembled, the centering frame 1, the torsion spring 2, the guide rod 3, the meshing disc 4, the guide claw 5 and the valve seat body 6 are assembled in sequence from top to bottom, the compression ring is embedded into the compression ring groove 62 on the periphery of the valve seat body 6, and then the sealing ring is embedded into the sealing ring groove 63, so that the valve seat body 6 and a fracturing pump valve box are tightly assembled; when the valve seat shakes under the action of external force, the anti-pressure ring made of alloy plays a role in bearing and relieving stress, and the sealing ring made of rubber plays a role in sealing and relieving vibration; the anti-pressure ring is in contact fit with the sealing ring, so that the assembling precision and the anti-pressure performance of the valve seat of the fracturing pump are improved, and the service life of the valve seat of the fracturing pump is prolonged.
The cross-sectional area of the top large disc 41 is larger than the cross-sectional areas of the middle small disc 42 and the transition disc 43, and the transition disc 43 has a slope of 20-30 degrees extending towards the lower inner part; the outer surface of the assembly tray 44 is provided with a first flange 45, a second flange 46 and a bottom flange 47 which are convex outwards from top to bottom; the inner surface of the main seat body 61 is provided with a first concave edge 64 and a second concave edge 65 which are concave inwards from top to bottom, and the upper surface of the inner cavity of the main seat body 61 has a slope of 20-30 degrees which extends upwards and outwards; a first O-ring 66 is fittingly mounted in a gap formed by the first flange 45 and the first concave edge 64, a second O-ring 67 is fittingly mounted in a gap formed by the second flange 46 and the second concave edge 65, and an inclined seal ring 68 is fittingly mounted in a gap formed by the upper surface of the inner cavity of the main housing 61 and the transition disc 43.
The inclination is arranged on the upper surfaces of the inner cavities of the transition disc 43 and the main seat body 61, so that the assembly disc 44 can conveniently enter the inner cavity of the main seat body 61; the plurality of flanges arranged on the outer surface of the assembling disc 44 and the plurality of concave edges arranged on the inner surface of the main seat body 61 are matched with the first O-shaped ring 66, the second O-shaped ring 67 and the inclined sealing ring 68, so that the multi-sealing assembly of the assembling disc 44 and the main seat body 61 is facilitated, the sealing property and the pressure resistance of the inner cavity of the main seat body 61 in the working process of the fracturing pump valve box are kept, and the pressure resistance and the service life of the fracturing pump valve seat are further improved.
Example 2
As shown in fig. 4-5, the embodiment provides a grinding and polishing device for a fracturing pump valve seat, which is used for grinding and polishing the inner wall of a sand blasting valve seat body 6, and includes a machine base 10, a multi-station positioning clamping mechanism 20 and a driving grinding mechanism 30, wherein the driving grinding mechanism 30 is arranged above the machine base 10, and the two multi-station positioning clamping mechanisms 20 are symmetrically arranged on two sides of the driving grinding mechanism 30.
Specifically, as shown in fig. 4-5 and 7, the driving grinding mechanism 30 includes a grinding box 31, a first speed reduction motor 32 and a grinding head 33, the grinding box 31 is disposed above the base 10, a mounting column 34 is connected between the bottom center of the grinding box 31 and the top of the base 10, support columns 35 are symmetrically disposed on two sides of the mounting column 34, the first speed reduction motor 32 is disposed in an inner cavity of the base 10, and a motor shaft of the first speed reduction motor 32 is connected to a rotating shaft 36 penetrating through the mounting column 34 to the inner cavity of the grinding box 31, a first limit bearing 361 is disposed on the periphery of the rotating shaft 36 at the top of the inner cavity of the mounting column 34, a second limit bearing 362 is disposed on the periphery of the rotating shaft 36 at the top of the inner cavity of the grinding box 31, a driving bevel gear 37 is connected to the periphery of the rotating shaft 36 at the inner cavity of the grinding box 31, and a first driven bevel gear 38 and a second driven bevel gear 39 are respectively engaged on the tops of two sides of the driving bevel gear 37. The first driven bevel gear 38 is connected with a first driven rod 48 horizontally extending out of one side of the grinding box 31, the second driven bevel gear 39 is connected with a second driven rod 49 horizontally extending out of the other side of the grinding box 31, and the tail ends of the first driven rod 48 and the second driven rod 49 are detachably connected with the grinding head 33.
When the grinding mechanism 30 is driven to work, the first speed reducing motor 32 drives the rotating shaft 36 to rotate, and the rotating shaft 36 drives the driving bevel gear 37 on the periphery of the rotating shaft to rotate; the first limit bearing 361 and the second limit bearing 362 respectively limit the upper part and the top of the rotating shaft 36, so that the stability of the rotating shaft 36 in the rotating process is kept, and shaking and deviation during polishing are avoided; the driving bevel gear 37 drives the first driven bevel gear 38 and the second driven bevel gear 39 to synchronously and reversely rotate, and the first driven bevel gear 38 and the second driven bevel gear 39 respectively drive the first driven rod 48 and the second driven rod 49 to rotate, so that the two polishing heads 33 at the tail ends synchronously rotate, polish and polish; the inner wall of the valve seat body is polished in a direction and at an adjustable speed by controlling the forward and reverse rotating speed of the first speed reducing motor 32, the polishing efficiency and the regulation sensitivity of the valve seat body are improved, and the polishing energy consumption is saved by synchronously polishing the two polishing heads 33 through one speed reducing motor.
As shown in fig. 5 and 9, the sanding head 33 comprises a mounting rod 331, a sanding disc 332 and a conical head 333, wherein a compression spring 334 is wound on the periphery of the mounting rod 331 and extends into the inner cavities of the first driven rod 48 and the second driven rod 49; the polishing disks 332 are disposed on the periphery of the mounting rod 331 with a gap therebetween, the conical head 333 is disposed on the top of the uppermost polishing disk 332, the polishing disk 332 has a single-groove structure made of tungsten steel, and the conical head 333 has a double-groove structure made of diamond. The sanding head 33 is structurally arranged, the mounting rod 331 and the compression spring 334 are matched and tightly assembled with the first driven rod 48 and the second driven rod 49, and the compression spring 334 can relieve vibration caused to the first driven rod 48 and the second driven rod 49 in a sanding process; a plurality of discs 332 of polishing are simultaneously polished to the inner wall of sandblast valve seat body 6, and the piece of production drops from the clearance between the discs 332 of polishing, and the conical head 333 of double flute structure is sharper, improves chip removal efficiency.
As shown in fig. 4-5 and fig. 7-8, the multi-station positioning and clamping mechanism 20 includes a positioning and clamping box 21, a material containing barrel 22 and an L-shaped mounting plate 23, the L-shaped mounting plates 23 are symmetrically disposed on two sides of the machine base 10, the positioning and clamping box 21 is fixed above the L-shaped mounting plate 23, and the material containing barrel 22 is disposed at the bottom of the L-shaped mounting plate 23 far from the machine base 10. The bottom of L shape mounting panel 23 is equipped with second gear motor 24, and second gear motor 24 is connected with and runs through L shape mounting panel 23 and extend to the connecting axle 25 in the location centre gripping case 21 cavity, and the top of connecting axle 25 is connected with station revolving stage 26. The cross-section of station revolving stage 26 is circular, and a plurality of valve seat draw-in grooves 261 of outer fringe ring array distribution of station revolving stage 26, the inside fixed telescopic cylinder 262 that does not rotate along with station revolving stage 26 that is equipped with of station revolving stage 26, and the piston rod 263 level of telescopic cylinder 262 inner chamber extends towards station revolving stage 26 outer fringe, and the end-to-end connection of piston rod 263 has clamping jaw 264, and clamping jaw 264 is used for carrying out the centre gripping and getting to the valve seat body and puts. The positioning clamping box 21 is provided with a polishing cavity 211 for extending the clamping jaw, the periphery of the piston rod 263 is wound with an extension spring 265, and the central axis of the telescopic cylinder 262 is superposed with the central axis of the polishing head 33. An elastic corrugated pipe 27 is connected between the material containing barrel 22 and the bottom of the positioning clamping box 21.
When the multi-station positioning and clamping mechanism 20 works, the sand blasting valve seat bodies 6 are placed in the valve seat clamping grooves 261 of the station rotating table 26; the second speed reducing motor 24 is started, the second speed reducing motor 24 drives the connecting shaft 25 and the station rotating table 26 to rotate, and one sandblasting valve seat body 6 is close to the clamping jaw 264; the telescopic cylinder 262 drives the piston rod 263 to extend, the clamping jaw 264 clamps the outer wall of the sand blasting valve seat body 6 after being opened, and the piston rod 263 drives the clamping jaw 264 to further extend so that the polishing head 33 enters the inner cavity of the sand blasting valve seat body 6; after polishing is finished, the piston rod 263 drives the clamping jaw 264 to contract, and the clamping jaw 264 is opened to enable the polished valve seat body to fall into the valve seat clamping groove 261; the second speed reducing motor 24 drives the station rotating table 26 to rotate, the polishing valve seat body is rotated to a position close to the elastic corrugated pipe 27, and the polishing valve seat body falls into the material containing barrel 22 through the elastic corrugated pipe 27 to be collected.
The inner chamber of frame 10 is equipped with and removes bits case 11, vacuum pump 12, and the bottom that removes bits case 11 is equipped with a plurality of bits bags 13 that remove, and the both sides that remove bits case 11 are connected with and remove bits pipe 14, and the one end that removes bits pipe 14 communicates with the bin outlet of vacuum pump 12, and the feed inlet of vacuum pump 12 is connected with and extends to the suction bits pipe 15 of case 31 and the 21 juncture below of location centre gripping case, and the top of sucking bits pipe 15 is equipped with an album bits and fights 16.
After the vacuum pump 12 is started, the chip suction pipe 15 generates negative pressure, chips generated in the grinding process enter the chip suction pipe 15 through the chip collecting hopper 16 under the action of the negative pressure, further enter the chip removing box 11 through the chip removing pipe 14, and the chips in the chip removing box 11 enter the chip removing bag 13 under the action of gravity to be collected.
Example 3
As shown in fig. 1 to 9, the embodiment provides a preparation process of a high-precision fracturing pump valve seat, which includes the following steps:
s1, die forging of a blank: selecting 20CrMnTi low-carbon alloy steel, and forging by adopting a die forging mode to obtain a valve seat body crude product;
s2, heat treatment: heating the crude product of the valve seat body to 952 ℃, preserving heat for 1.5 hours, and cooling to obtain a heat-treated valve seat body;
s3, fine machining: machining an inclination, compression ring groove 62, a sealing ring groove 63, a first concave edge 64 and a second concave edge 65 by using a numerical control machine tool to obtain a finish-machined valve seat body;
s4, sand blasting: under the conditions that the air pressure is 1.1MPa and the sand blasting included angle is 35 degrees, adopting 100-mesh brown emery to perform sand blasting treatment on the finish-machined valve seat body to obtain a sand blasting valve seat body;
s5, polishing: after the outer wall of the sand blasting valve seat body is polished, polishing equipment is adopted to polish and polish the inner wall of the sand blasting valve seat body, and a polished valve seat body is obtained;
the specific process of polishing is as follows: placing a plurality of sand blasting valve seat bodies 6 in the valve seat clamping grooves 261 of the station rotating table 26; the second speed reducing motor 24 is started, the second speed reducing motor 24 drives the connecting shaft 25 and the station rotating table 26 to rotate, and one sandblasting valve seat body 6 is close to the clamping jaw 264; the telescopic cylinder 262 drives the piston rod 263 to extend, the clamping jaw 264 clamps the outer wall of the sand blasting valve seat body 6 after being opened, and the piston rod 263 drives the clamping jaw 264 to further extend so that the polishing head 33 enters the inner cavity of the sand blasting valve seat body 6; the first speed reducing motor 32 drives the rotating shaft 36 to rotate, and the rotating shaft 36 drives the driving bevel gear 37 on the periphery thereof to rotate; the driving bevel gear 37 drives the first driven bevel gear 38 and the second driven bevel gear 39 to synchronously and reversely rotate, and the first driven bevel gear 38 and the second driven bevel gear 39 respectively drive the first driven rod 48 and the second driven rod 49 to rotate, so that the two polishing heads 33 at the tail ends synchronously rotate, polish and polish; the piston rod 263 drives the clamping jaw 264 to contract, and the clamping jaw 264 is opened to enable the polished valve seat body to fall into the valve seat clamping groove 261; the second speed reducing motor 24 drives the station rotating table 26 to rotate, the polished valve seat body is rotated to a position close to the elastic corrugated pipe 27, and the polished valve seat body falls into the material containing barrel 22 through the elastic corrugated pipe 27 to be collected;
s6, assembling: inserting the guide rod 3 from the bottom of the centering frame 1, then tightly pressing and assembling the guide rod through the torsion spring 2, inserting the meshing disc 4 into an inner cavity of the valve seat body 6, installing a first O-shaped ring 66 in a gap formed by assembling the first flange 45 and the first concave edge 64 in an adaptive manner, installing a second O-shaped ring 67 in a gap formed by assembling the second flange 46 and the second concave edge 65 in an adaptive manner, and installing an inclined sealing ring 68 in a gap formed by assembling the upper surface of the inner cavity of the main seat body 61 and the transition disc 43 in an adaptive manner to obtain a finished valve seat product; the finished valve seat is assembled with the fracturing pump valve box through a pressure resistant ring embedded in the pressure resistant ring groove 62 and a sealing ring embedded in the sealing ring groove 63.
The preparation process of the high-precision fracturing pump valve seat comprises the steps of die forging blank, heat treatment, finish machining, sand blasting, grinding and assembling, wherein in the grinding step, the inner wall of a sand blasting valve seat body is polished and ground through polishing and grinding equipment, and the inner wall of the valve seat body is polished and polished in an adjustable direction and speed by controlling the forward and reverse rotating speed of the first speed reducing motor 32, so that the polishing and polishing efficiency and the regulation and control sensitivity of the valve seat body are improved, and the synchronous grinding of the two polishing heads 33 is realized through one speed reducing motor, so that the grinding energy consumption is saved; in the assembling step, the fracturing pump valve box is assembled through the compression resistant ring embedded in the compression resistant ring groove 62 and the sealing ring embedded in the sealing ring groove 63, and the plurality of flanges arranged on the outer surface of the assembling disc 44 and the plurality of concave edges arranged on the inner surface of the main seat body 61 are matched with the first O-shaped ring 66, the second O-shaped ring 67 and the inclined sealing ring 68, so that the multiple sealing assembly of the assembling disc 44 and the main seat body 61 is facilitated, and the sealing performance and the compression resistant performance of the inner cavity of the main seat body 61 in the working process of the fracturing pump valve box are maintained.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The utility model provides a high accuracy fracturing pump valve seat, including righting frame (1), torsion spring (2), guide bar (3), interlock dish (4), direction claw (5) and valve seat body (6), guide bar (3) and direction claw (5) integrated into one piece are in the top and the bottom of interlock dish (4), guide bar (3) compress tightly the assembly through torsion spring (2) after inserting from the bottom of righting frame (1), the surface of interlock dish (4) and the inner chamber assembly of valve seat body (6), a serial communication port, interlock dish (4) are including from last big dish (41) in top that sets gradually down, middle small dish (42), transition dish (43) and assembly dish (44), valve seat body (6) have inside main 61 of cavity, the periphery of main pedestal (61) is close to the below and is equipped with resistance to pressure ring groove (62), the surface of resistance ring groove (62) is equipped with seal ring groove (63), main pedestal (61) through the resistance ring groove (63) of embedding and the contact seal ring of resistance ring groove (62), the fracturing pump seat body and the contact seal ring of resistance case and resistance valve case.
2. A high precision frac pump valve seat as claimed in claim 1 wherein the cross sectional area of said top large disc (41) is greater than the cross sectional area of the intermediate small disc (42) and the transition disc (43), the transition disc (43) having a slope of 20 to 30 ° extending inwardly towards the lower side; the outer surface of the assembly disc (44) is provided with a first flange (45), a second flange (46) and a bottom flange (47) which are convex outwards from top to bottom; the inner surface of the main seat body (61) is provided with a first concave edge (64) and a second concave edge (65) which are concave inwards from top to bottom, and the upper surface of the inner cavity of the main seat body (61) is provided with a slope which extends upwards and outwards and is 20-30 degrees.
3. A high accuracy frac pump valve seat according to claim 2, wherein said first flange (45) is fitted with a first O-ring (66) in the gap formed by fitting the first concave edge (64), said second flange (46) is fitted with a second O-ring (67) in the gap formed by fitting the second concave edge (65), and said inclined sealing ring (68) is fitted in the gap formed by fitting the upper surface of the inner cavity of the main seat body (61) and the transition disc (43).
4. A preparation process of a high-precision fracturing pump valve seat is characterized by comprising the following steps:
s1, die forging of a blank: selecting 20CrMnTi low-carbon alloy steel, and forging by adopting a die forging mode to obtain a valve seat body crude product;
s2, heat treatment: heating the crude valve seat body to 940-955 ℃, preserving the heat for 1-2 hours, and cooling to obtain a heat-treated valve seat body;
s3, fine machining: machining an inclination, compression ring groove (62), a sealing ring groove (63), a first concave edge (64) and a second concave edge (65) by using a numerical control machine tool to obtain a finish machining valve seat body;
s4, sand blasting: under the conditions that the air pressure is 0.8-1.2 MPa and the sand blasting included angle is 30-45 degrees, adopting 80-100 meshes of brown emery to perform sand blasting treatment on the finish-machined valve seat body to obtain a sand blasting valve seat body;
s5, polishing: after the outer wall of the sand blasting valve seat body is polished, polishing and burnishing are carried out on the inner wall of the sand blasting valve seat body by adopting polishing and burnishing equipment to obtain a polished valve seat body;
s6, assembling: inserting a guide rod (3) from the bottom of a centering frame (1), then pressing and assembling the guide rod through a torsion spring (2), inserting a meshing disc (4) into an inner cavity of a valve seat body (6), installing a first O-shaped ring (66) in a gap formed by assembling a first flange (45) and a first concave edge (64) in a matched mode, installing a second O-shaped ring (67) in a gap formed by assembling a second flange (46) and a second concave edge (65) in a matched mode, and installing an inclined sealing ring (68) in a gap formed by assembling the upper surface of the inner cavity of a main seat body (61) and a transition disc (43) in a matched mode to obtain a finished valve seat; the finished product of the valve seat is assembled with the fracturing pump valve box through a pressure resistant ring embedded in the pressure resistant ring groove (62) and a sealing ring embedded in the sealing ring groove (63).
5. The preparation process of the high-precision fracturing pump valve seat as claimed in claim 4, wherein the specific process of polishing and burnishing the inner wall of the sand blasting valve seat body by adopting burnishing and burnishing equipment comprises the following steps: placing a plurality of sand blasting valve seat bodies (6) in valve seat clamping grooves (261) of a station rotating table (26); a second speed reducing motor (24) is started, the second speed reducing motor (24) drives the connecting shaft (25) and the station rotating table (26) to rotate, and one sandblasting valve seat body (6) is close to the clamping jaw (264); the telescopic cylinder (262) drives the piston rod (263) to extend, the clamping jaw (264) clamps the outer wall of the sand blasting valve seat body (6) after being opened, and the piston rod (263) drives the clamping jaw (264) to further extend so that the polishing head (33) enters the inner cavity of the sand blasting valve seat body (6); the first speed reducing motor (32) drives the rotating shaft (36) to rotate, and the rotating shaft (36) drives the driving bevel gear (37) on the periphery of the rotating shaft to rotate; the driving bevel gear (37) drives the first driven bevel gear (38) and the second driven bevel gear (39) to synchronously and reversely rotate, and the first driven bevel gear (38) and the second driven bevel gear (39) respectively drive the first driven rod (48) and the second driven rod (49) to rotate, so that the two polishing heads (33) at the tail ends synchronously rotate, polish and polish; the piston rod (263) drives the clamping jaw (264) to contract, and the clamping jaw (264) is opened to enable the polished valve seat body to fall into the valve seat clamping groove (261); the second speed reducing motor (24) drives the station rotating table (26) to rotate, the polishing valve seat body is rotated to a position close to the elastic corrugated pipe (27), and the polishing valve seat body falls into the material containing barrel (22) through the elastic corrugated pipe (27) to be collected.
6. The preparation process of the high-precision fracturing pump valve seat as claimed in claim 4, wherein the grinding and polishing equipment comprises a machine base (10), a multi-station positioning and clamping mechanism (20) and a driving grinding mechanism (30), wherein the driving grinding mechanism (30) is arranged above the machine base (10), and the two multi-station positioning and clamping mechanisms (20) are symmetrically arranged at two sides of the driving grinding mechanism (30); drive grinding machanism (30) are including grinding case (31), first gear motor (32) and grinding head (33), the top of frame (10) is located in grinding case (31), be connected with erection column (34) between the bottom center of grinding case (31) and the top of frame (10), the bilateral symmetry of erection column (34) is equipped with support column (35), the inner chamber and its motor shaft that frame (10) was located in first gear motor (32) are connected with rotation axis (36) that run through erection column (34) to grinding case (31) inner chamber.
7. The preparation process of the high-precision fracturing pump valve seat as claimed in claim 6, wherein a first limit bearing (361) is arranged on the periphery of the rotating shaft (36) at the top of the inner cavity of the mounting column (34), a second limit bearing (362) is arranged on the periphery of the rotating shaft (36) at the top of the inner cavity of the grinding box (31), a driving bevel gear (37) is connected to the periphery of the rotating shaft (36) at the position of the inner cavity of the grinding box (31), and a first driven bevel gear (38) and a second driven bevel gear (39) are respectively meshed with the tops of two sides of the driving bevel gear (37); the first driven bevel gear (38) is connected with a first driven rod (48) horizontally extending out of one side of the grinding box (31), the second driven bevel gear (39) is connected with a second driven rod (49) horizontally extending out of the other side of the grinding box (31), and the tail ends of the first driven rod (48) and the second driven rod (49) can be detachably connected with a grinding head (33).
8. The preparation process of the high-precision fracturing pump valve seat as claimed in claim 6, wherein the multi-station positioning and clamping mechanism (20) comprises a positioning and clamping box (21), a material containing barrel (22) and an L-shaped mounting plate (23), wherein the L-shaped mounting plate (23) is symmetrically arranged on two sides of the machine seat (10), the positioning and clamping box (21) is fixed above the L-shaped mounting plate (23), and the material containing barrel (22) is arranged at the bottom of one side, away from the machine seat (10), of the L-shaped mounting plate (23); the bottom of L shape mounting panel (23) is equipped with second gear motor (24), and second gear motor (24) are connected with and run through L shape mounting panel (23) and extend to connecting axle (25) in location centre gripping case (21) cavity, and the top of connecting axle (25) is connected with station revolving stage (26).
9. The preparation process of the high-precision fracturing pump valve seat as claimed in claim 8, wherein the cross section of the station rotating table (26) is circular, a plurality of valve seat clamping grooves (261) are distributed on the outer edge of the station rotating table (26) in an annular array, a telescopic cylinder (262) which does not rotate along with the station rotating table (26) is fixedly arranged inside the station rotating table (26), a piston rod (263) in the inner cavity of the telescopic cylinder (262) horizontally extends towards the outer edge of the station rotating table (26), the tail end of the piston rod (263) is connected with a clamping jaw (264), and the clamping jaw (264) is used for clamping, taking and placing the valve seat body; a polishing cavity (211) for the clamping jaw to extend out is formed in the positioning clamping box (21), an extension spring (265) is wound on the periphery of a piston rod (263), and the central axis of a telescopic cylinder (262) is superposed with the central axis of a polishing head (33); an elastic corrugated pipe (27) is connected between the material containing barrel (22) and the bottom of the positioning clamping box (21).
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| CN202210857380.5A CN115163480B (en) | 2022-07-20 | 2022-07-20 | High-precision fracturing pump valve seat and preparation process thereof |
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| CN202210857380.5A CN115163480B (en) | 2022-07-20 | 2022-07-20 | High-precision fracturing pump valve seat and preparation process thereof |
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| CN115163480B CN115163480B (en) | 2023-10-17 |
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| CN209340130U (en) * | 2019-01-04 | 2019-09-03 | 黄山市汇润机械有限公司 | A kind of valve valve |
| CN110576374A (en) * | 2018-06-09 | 2019-12-17 | 常州煜明电子有限公司 | Injection molding grinding device |
| CN112008340A (en) * | 2020-08-25 | 2020-12-01 | 湖北中油科昊机械制造有限公司 | Method and device for processing valve seat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107322395A (en) * | 2017-06-28 | 2017-11-07 | 杭州腾略科技有限公司 | A kind of outer rim sanding apparatus for auto parts machinery |
| CN107520736A (en) * | 2017-09-29 | 2017-12-29 | 广东利迅达机器人系统股份有限公司 | A kind of door handle polishing wire-drawing equipment |
| CN110576374A (en) * | 2018-06-09 | 2019-12-17 | 常州煜明电子有限公司 | Injection molding grinding device |
| CN209261798U (en) * | 2018-11-27 | 2019-08-16 | 中国石油集团川庆钻探工程有限公司 | A kind of fracturing pump valve body |
| CN209062758U (en) * | 2018-12-07 | 2019-07-05 | 滨海县永达机械有限公司 | A kind of metal valve casting grinding device |
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| CN115163480B (en) | 2023-10-17 |
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