CN214171488U - Low-shear-rate plunger pump valve body and plunger pump - Google Patents
Low-shear-rate plunger pump valve body and plunger pump Download PDFInfo
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- CN214171488U CN214171488U CN202022201494.3U CN202022201494U CN214171488U CN 214171488 U CN214171488 U CN 214171488U CN 202022201494 U CN202022201494 U CN 202022201494U CN 214171488 U CN214171488 U CN 214171488U
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Abstract
The utility model belongs to the technical field of the plunger pump, especially, relate to a low shear rate plunger pump valve body and plunger pump. The plunger pump valve body and the plunger pump ensure the sealing effect on a medium, and simultaneously reduce the instantaneous speed of liquid flow during steering and reduce the shearing action of the liquid flow on a polymer through the design of the cambered surface flow channel. A low-shear rate plunger pump valve body is of a butterfly structure and is composed of a plunger pump valve body and a plunger pump valve spherical surface; the plunger pump valve main body is provided with a spring mounting bulge, and the tail end of the plunger pump valve main body is provided with a spring positioning head; and a spring clamping groove is also formed in one side of the spring mounting protrusion, which deviates from the tail end of the plunger pump valve main body.
Description
Technical Field
The utility model belongs to the technical field of the plunger pump, especially, relate to a low shear rate plunger pump valve body and plunger pump.
Background
The field development of the Chengqi field at the Shengli offshore field is about 30 years, the field is adjusted to approach the tail sound along with the old field, new wells are reduced year by year, the difficulty of maintaining stable production of water drive development is increased year by year, the operation per ton of oil of a single well is rapidly increased, the benefit is deteriorated, and therefore, the development mode needs to be converted to improve the oil production speed and the recovery ratio. The oil reservoir conditions of the offshore main body Librarian pottery group are similar to the I-type and II-type conditions in land chemical flooding resource classification categories, static parameters such as the viscosity of underground crude oil, the air permeability, the formation temperature, the formation water mineralization and the like are in the favorable range for implementing tertiary oil recovery, and dynamic parameters such as comprehensive water content, the extraction degree and the like are all in the favorable time for implementing tertiary oil recovery. The binary composite oil displacement technology is a novel tertiary oil recovery technology developed in the late nineties of the twentieth century, and is characterized in that a surfactant is added into a polymer solution, so that the tackifying effect of a polymer is exerted, the swept volume is enlarged, the synergistic effect of the surfactant is exerted, the saturation of residual oil in water displacement is reduced, the recovery ratio can be increased more quickly and greatly than that of single polymer displacement, the problems of scaling, corrosion, emulsification and the like caused by a ternary composite oil displacement system are avoided, and the binary composite oil displacement technology has a good application prospect. Meanwhile, under the background of the current water flooding development, the deep profile control of a water injection well is an effective means for improving the recovery ratio of an oil field, is the technical upgrade of the profile control of a water well, and belongs to a technical system combining secondary oil recovery and tertiary oil recovery.
The basic principle of the injection of polymer is that the water-containing liquid of the polymer (polyacrylamide) has the characteristic of high viscosity, when the aqueous solution of the polymer with certain viscosity is injected into an oil layer, the viscosity of the polymer is higher than that of water, and the oil displacement efficiency is higher than that of water, so that the recovery ratio of the oil field can be improved, the viscosity of the polymer is a key factor for ensuring the development effect, the oil displacement efficiency is higher as the viscosity is higher, and the key for influencing the oil displacement efficiency is to improve the viscosity of the polymer injected into the oil layer. However, since the polymer is a high molecular compound formed by polymerization, the polymer molecules are sheared and degraded to different degrees by various mechanical devices such as pressurization of various mechanical devices and various pipelines during the injection process, so that the viscosity of the polymer solution is reduced. Therefore, in order to ensure that the viscosity of the polymer is not affected during the polymer injection process, it is desirable that the shear on the polymer be as low as possible during the injection process.
The polymer is a macromolecular chain formed by polymerizing acrylamide, the molecules of an aqueous solution of the polymer are in a stretched state, the molecular chain can be broken by mechanical action to form relatively low molecules, and the phenomenon is the shearing phenomenon of the polymer. The polymer mother liquor is output to an injection pump through a feeding pump at low pressure, the injection pump is low-pressure inlet high-pressure outlet, the polymer injection pump used in the current mine field is generally a reciprocating pump with three plungers, the characteristic of the plunger reciprocating pump is the intermittent fluidity of fluid, the inlet and outlet valves of the pump are in an alternate opening and closing state, the polymer solution is often intercepted by the pump valve and is in a discontinuous state, and the shearing action has great shearing action on the polymer, and is difficult to avoid. In addition, the plunger of the pump continuously impacts the polymer solution to generate shearing to the polymer.
The plunger pump is a general device used for engineering construction operations such as polymer injection, well cementation, well repair, fracturing and the like in the petroleum drilling and production industry. The plunger pump consists of a power end and a hydraulic end, as shown in figure 1, the hydraulic end usually consists of a plunger (1-1), a valve box (1-2), a plunger seal (1-3), a valve seat (1-4), a valve body (1-5), a discharge spring (1-6), a sealing gland (1-7), a pressing block (1-8), a suction spring (1-9) and the like. When the plunger pump works, when the plunger moves towards the outside of the valve box, the suction valve is opened, the discharge valve is closed, the medium enters the valve box, when the plunger moves towards the inside of the valve box, the suction valve is closed, the discharge valve is opened, and the high-pressure medium is discharged from the valve box.
The quality of the plunger reciprocating pump comprises the sealing performance of a pump inlet valve and a pump outlet valve, the reasonability and smoothness of a flow passage, the shape and the sealing performance of a pump plunger and the like. For a plunger reciprocating pump, the most serious influence on polymer shearing is shearing caused by opening and closing of a pump inlet valve and a pump outlet valve, leakage of the pump inlet valve and the pump outlet valve is caused, and the shape of the head of a plunger of the pump is the shape of the head of the plunger. The shear of the pump inlet and outlet valves on the polymer is difficult to avoid, which is determined by the design characteristics of the plunger reciprocating pump, and the shear value of the pump inlet and outlet valves on the polymer is generally fixed for a fixed pump, but the mechanical shape of the pump valve also has certain influence on the shear of the polymer. The influence of the leakage of the pump valve on the shearing of the polymer is large, the backflow polymer generates high throttling in a gap of the pump valve due to the leakage of the pump valve, the backflow polymer is seriously sheared, when the leakage of the pump valve is serious, the polymer flows back and forth between the pump valve and is repeatedly sheared, and the valve body structure of the polymer needs to be improved.
As shown in fig. 2a and 2b, the valve body assembly of the conventional plunger type reciprocating pump is composed of a valve body (2-1) and a valve rubber (2-2), wherein the valve body is a steel workpiece, the valve rubber is a polyurethane sealing element, and a working conical surface of the valve rubber is matched with an upper conical surface of a valve seat to realize the sealing effect on a medium. However, the conventional valve body is designed with four conical guide claws, and the structure has serious shearing and splitting effects on the polymer, thereby influencing the application effect of the polymer.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low shear rate plunger pump valve body and plunger pump, this plunger pump valve body and plunger pump are when guaranteeing the sealed effect of medium, through cambered surface runner design, reduce the instantaneous speed when the liquid stream turns to, have reduced its shearing action to the polymer.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a low-shear rate plunger pump valve body is of a butterfly structure and is composed of a plunger pump valve body and a plunger pump valve spherical surface;
the plunger pump valve main body is provided with a spring mounting bulge, and the tail end of the plunger pump valve main body is provided with a spring positioning head; and a spring clamping groove is also formed in one side of the spring mounting protrusion, which deviates from the tail end of the plunger pump valve main body.
Preferably, the outer surface of the spherical structure of the plunger pump valve is further coated with a polyurethane vulcanized layer.
Preferably, the thickness of the polyurethane vulcanized layer is not less than 5mm, the hardness is 90-95 Shore, and the tensile strength is 61.2 MPa.
Preferably, the outer side of the polyurethane vulcanized layer is further coated with a vulcanized fixing layer.
Preferably, the spring clamping groove is of an annular arc clamping groove structure.
Preferably, the tail end of the plunger pump valve main body is of an arc-shaped structure without a chamfer.
Preferably, the plunger pump valve body is integrally formed by steel forging.
The utility model discloses an on the other hand, a low shear rate plunger pump, include as above-mentioned low shear rate plunger pump valve body.
The utility model provides a low-shearing rate plunger pump valve body and a plunger pump, the plunger pump consists of a plunger pump valve main body and a plunger pump valve spherical surface, a spring mounting bulge is arranged on the plunger pump valve main body, and the tail end of the plunger pump valve main body is provided with a spring positioning head; the outer surface of the spherical surface of the plunger pump valve is also preferably coated with a polyurethane vulcanized layer and a vulcanized fixing layer. The plunger pump valve body and the plunger pump with the structural characteristics reduce the instantaneous speed of liquid flow during diversion and reduce the shearing action of the liquid flow on polymers through the design of the cambered surface flow channel.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the following drawings:
FIG. 1 is a schematic diagram of a prior art plunger pump;
FIG. 2a is a schematic view of a valve body of a prior art plunger pump;
FIG. 2b is a second schematic structural view of a valve body of a prior art plunger pump;
fig. 3 is a schematic structural view of a low shear rate plunger pump valve body provided by the present invention;
fig. 4 is a schematic structural diagram of a low shear rate plunger pump provided by the present invention;
reference numerals: 3-1: plunger, 3-2: valve box, 3-3: plunger sealing, 3-4: valve seat, 3-5: valve body, 3-6: discharge spring, 3-7: sealing gland, 3-8: briquetting and 3-9: a suction spring; 4-1: spring mounting projection, 4-2: plunger pump valve body, 4-3: a polyurethane vulcanized layer, 4-4: plunger pump valve spherical surface, 4-5: spring clamp groove, 4-6: spring positioning head, 4-7: and vulcanizing the fixed layer.
Detailed Description
The utility model provides a low shear rate plunger pump valve body and plunger pump, this plunger pump valve body and plunger pump are when guaranteeing the sealed effect of medium, through cambered surface runner design, reduce the instantaneous speed when the liquid stream turns to, have reduced its shearing action to the polymer.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Example one
The utility model provides a low shear rate plunger pump valve body, as shown in FIG. 3, this low shear rate plunger pump valve body is whole to be butterfly structure, and it specifically comprises plunger pump valve main part and plunger pump valve sphere two parts.
As shown in fig. 3, a spring mounting protrusion is disposed on the plunger pump valve body, and a spring positioning head is disposed at the end of the plunger pump valve body. In addition, as shown in fig. 3, a spring clamping groove is further formed in one side of the spring mounting protrusion, which is far away from the tail end of the plunger pump valve main body, and the spring clamping groove is used for fixing a spring and preventing the spring from falling off accidentally due to stress in the using process.
As a preferred embodiment of the present invention, as shown in fig. 3, the outer surface of the spherical structure of the plunger pump valve is preferably further coated with a polyurethane vulcanized layer. The polyurethane vulcanized layer can play a role in sealing the spherical surface of the plunger pump valve on one hand; on the other hand, the polyurethane vulcanized layer has certain hardness and can realize proper elastic deformation. In another preferred embodiment of the present invention, as shown in fig. 3, the end of the plunger pump valve body is formed in an arc shape without a chamfer. It is worth noting that through the cambered surface flow passage design, the spherical surface structure of the plunger pump valve and the tail end of the plunger pump valve main body can finally achieve the technical purpose of reducing the shearing effect on the polymer.
Example two
The second embodiment includes all the technical features of the first embodiment, specifically: the utility model provides a low shear rate plunger pump valve body, as shown in FIG. 3, this low shear rate plunger pump valve body is whole to be butterfly structure, and it specifically comprises plunger pump valve main part and plunger pump valve sphere two parts.
As shown in fig. 3, a spring mounting protrusion is disposed on the plunger pump valve body, and a spring positioning head is disposed at the end of the plunger pump valve body. In addition, as shown in fig. 3, a spring clamping groove is further formed in one side of the spring mounting protrusion, which is far away from the tail end of the plunger pump valve main body, and the spring clamping groove is used for fixing a spring and preventing the spring from falling off accidentally due to stress in the using process.
As a preferred embodiment of the present invention, as shown in fig. 3, the outer surface of the spherical structure of the plunger pump valve is preferably further coated with a polyurethane vulcanized layer. The polyurethane vulcanized layer can play a role in sealing the spherical surface of the plunger pump valve on one hand; on the other hand, the polyurethane vulcanized layer has certain hardness and can realize proper elastic deformation. In another preferred embodiment of the present invention, as shown in fig. 3, the end of the plunger pump valve body is formed in an arc shape without a chamfer. It is worth noting that through the cambered surface flow passage design, the spherical surface structure of the plunger pump valve and the tail end of the plunger pump valve main body can finally achieve the technical purpose of reducing the shearing effect on the polymer.
In addition, the second embodiment further limits the spring clamping groove structure. Specifically, as the utility model relates to a comparatively preferred embodiment, spring card slot is the annular arc draw-in groove structure. By adopting the spring clamping groove with the annular arc, the instantaneous speed of the liquid flow during steering is further reduced, so that certain help is provided for reducing the shear rate.
EXAMPLE III
The third embodiment includes all the technical features of the first embodiment, and specifically includes: the utility model provides a low shear rate plunger pump valve body, as shown in FIG. 3, this low shear rate plunger pump valve body is whole to be butterfly structure, and it specifically comprises plunger pump valve main part and plunger pump valve sphere two parts.
As shown in fig. 3, a spring mounting protrusion is disposed on the plunger pump valve body, and a spring positioning head is disposed at the end of the plunger pump valve body. In addition, as shown in fig. 3, a spring clamping groove is further formed in one side of the spring mounting protrusion, which is far away from the tail end of the plunger pump valve main body, and the spring clamping groove is used for fixing a spring and preventing the spring from falling off accidentally due to stress in the using process.
As a preferred embodiment of the present invention, as shown in fig. 3, the outer surface of the spherical structure of the plunger pump valve is preferably further coated with a polyurethane vulcanized layer. The polyurethane vulcanized layer can play a role in sealing the spherical surface of the plunger pump valve on one hand; on the other hand, the polyurethane vulcanized layer has certain hardness and can realize proper elastic deformation. In another preferred embodiment of the present invention, as shown in fig. 3, the end of the plunger pump valve body is formed in an arc shape without a chamfer. It is worth noting that through the cambered surface flow passage design, the spherical surface structure of the plunger pump valve and the tail end of the plunger pump valve main body can finally achieve the technical purpose of reducing the shearing effect on the polymer.
In addition, the third example further defines the polyurethane vulcanized layer. Specifically, the thickness of the formed polyurethane vulcanized layer is preferably not less than 5mm, the material is TDI polyester polyurethane prepolymer, the hardness of the formed polyurethane vulcanized layer is Shore 90-95 degrees, and the tensile strength is 61.2 MPa. It is noted that the polyurethane vulcanizate has excellent tensile tear properties, excellent abrasion resistance, heat resistance and solvent resistance, ensuring a compression set of not more than 34% during normal operation.
Example four
The fourth embodiment includes all the technical features of the first embodiment, and specifically includes: the utility model provides a low shear rate plunger pump valve body, as shown in FIG. 3, this low shear rate plunger pump valve body is whole to be butterfly structure, and it specifically comprises plunger pump valve main part and plunger pump valve sphere two parts.
As shown in fig. 3, a spring mounting protrusion is disposed on the plunger pump valve body, and a spring positioning head is disposed at the end of the plunger pump valve body. In addition, as shown in fig. 3, a spring clamping groove is further formed in one side of the spring mounting protrusion, which is far away from the tail end of the plunger pump valve main body, and the spring clamping groove is used for fixing a spring and preventing the spring from falling off accidentally due to stress in the using process.
As a preferred embodiment of the present invention, as shown in fig. 3, the outer surface of the spherical structure of the plunger pump valve is preferably further coated with a polyurethane vulcanized layer. The polyurethane vulcanized layer can play a role in sealing the spherical surface of the plunger pump valve on one hand; on the other hand, the polyurethane vulcanized layer has certain hardness and can realize proper elastic deformation. In another preferred embodiment of the present invention, as shown in fig. 3, the end of the plunger pump valve body is formed in an arc shape without a chamfer. It is worth noting that through the cambered surface flow passage design, the spherical surface structure of the plunger pump valve and the tail end of the plunger pump valve main body can finally achieve the technical purpose of reducing the shearing effect on the polymer.
In addition, in example four, a vulcanization-fixing layer is further described. It should be noted that the vulcanized fixing layer is preferably coated on the periphery of the polyurethane vulcanized layer to protect the polyurethane vulcanized layer.
EXAMPLE five
The fifth embodiment includes all the technical features of the first embodiment, and specifically includes: the utility model provides a low shear rate plunger pump valve body, as shown in FIG. 3, this low shear rate plunger pump valve body is whole to be butterfly structure, and it specifically comprises plunger pump valve main part and plunger pump valve sphere two parts.
As shown in fig. 3, a spring mounting protrusion is disposed on the plunger pump valve body, and a spring positioning head is disposed at the end of the plunger pump valve body. In addition, as shown in fig. 3, a spring clamping groove is further formed in one side of the spring mounting protrusion, which is far away from the tail end of the plunger pump valve main body, and the spring clamping groove is used for fixing a spring and preventing the spring from falling off accidentally due to stress in the using process.
As a preferred embodiment of the present invention, as shown in fig. 3, the outer surface of the spherical structure of the plunger pump valve is preferably further coated with a polyurethane vulcanized layer. The polyurethane vulcanized layer can play a role in sealing the spherical surface of the plunger pump valve on one hand; on the other hand, the polyurethane vulcanized layer has certain hardness and can realize proper elastic deformation. In another preferred embodiment of the present invention, as shown in fig. 3, the end of the plunger pump valve body is formed in an arc shape without a chamfer. It is worth noting that through the cambered surface flow passage design, the spherical surface structure of the plunger pump valve and the tail end of the plunger pump valve main body can finally achieve the technical purpose of reducing the shearing effect on the polymer.
In addition, the fifth embodiment further defines the preparation process of the plunger pump valve body. Specifically, the plunger pump valve body is preferably integrally formed by forging steel.
EXAMPLE six
The utility model also provides a low shear rate plunger pump, as shown in figure 4, wherein the plunger pump valve body of this plunger pump kind has adopted the pattern in above-mentioned embodiment one-embodiment five (as shown in figure 3), and its aim at is through the cambered surface design of adjustment plunger pump to reach the technical purpose that reduces the effect of cuting to the polymer.
The utility model provides a low-shearing rate plunger pump valve body and a plunger pump, wherein the plunger pump consists of a plunger pump valve main body and a plunger pump valve spherical surface, a spring mounting bulge is arranged on the plunger pump valve main body, and a spring positioning head is arranged at the tail end of the plunger pump valve main body; the outer surface of the spherical surface of the plunger pump valve is also preferably coated with a polyurethane vulcanized layer and a vulcanized fixing layer. The plunger pump valve body and the plunger pump with the structural characteristics reduce the instantaneous speed of liquid flow during diversion and reduce the shearing action of the liquid flow on polymers through the design of the cambered surface flow channel.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The plunger pump valve body with the low shear rate is characterized in that the plunger pump valve body is of a butterfly structure and is composed of a plunger pump valve main body and a plunger pump valve spherical surface;
the plunger pump valve main body is provided with a spring mounting bulge, and the tail end of the plunger pump valve main body is provided with a spring positioning head; and a spring clamping groove is also formed in one side of the spring mounting protrusion, which deviates from the tail end of the plunger pump valve main body.
2. The low shear rate plunger pump valve body of claim 1, wherein the outer surface of the spherical structure of the plunger pump valve is further coated with a polyurethane vulcanizate.
3. The valve body of claim 2, wherein the polyurethane vulcanizate has a thickness of not less than 5mm, a hardness of 90-95 shore, and a tensile strength of 61.2 Mpa.
4. The low shear rate plunger pump valve body of claim 1, wherein the outer side of the polyurethane vulcanizate is further coated with a vulcanized fixing layer.
5. The low shear rate plunger pump valve body of claim 1, wherein said spring retainer groove is an annular arc retainer groove structure.
6. The low shear rate plunger pump valve body of claim 1, wherein said plunger pump valve body terminates in an arc-shaped configuration without a chamfer.
7. The valve body of claim 1, wherein the valve body is forged from steel and is formed integrally therewith.
8. A low shear rate plunger pump comprising a low shear rate plunger pump valve body as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022201494.3U CN214171488U (en) | 2021-07-26 | 2021-07-26 | Low-shear-rate plunger pump valve body and plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022201494.3U CN214171488U (en) | 2021-07-26 | 2021-07-26 | Low-shear-rate plunger pump valve body and plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN214171488U true CN214171488U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022201494.3U Active CN214171488U (en) | 2021-07-26 | 2021-07-26 | Low-shear-rate plunger pump valve body and plunger pump |
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| Country | Link |
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| CN (1) | CN214171488U (en) |
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2021
- 2021-07-26 CN CN202022201494.3U patent/CN214171488U/en active Active
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