CN113074107A - Hydraulic end of reciprocating pump - Google Patents
Hydraulic end of reciprocating pump Download PDFInfo
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- CN113074107A CN113074107A CN202110495504.5A CN202110495504A CN113074107A CN 113074107 A CN113074107 A CN 113074107A CN 202110495504 A CN202110495504 A CN 202110495504A CN 113074107 A CN113074107 A CN 113074107A
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- valve
- hole
- suction
- discharge
- cylinder body
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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
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
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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
- F04B53/04—Draining
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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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
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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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/166—Cylinder liners
Abstract
The invention provides a reciprocating pump hydraulic end, comprising: the liquid cylinder body, the upper pressure plate, the discharge cylinder sleeve, the discharge valve group, the middle spacer sleeve, the suction valve group, the suction cylinder sleeve, the lower pressure plate and the liquid discharge assembly; a through-type valve hole is formed in the hydraulic cylinder body, the lower pressing plate is in a stepped flange shape, the small excircle end face of the lower pressing plate is arranged in the through-type valve hole, and the large excircle end face of the lower pressing plate covers the hydraulic cylinder body so as to seal one end of the hydraulic cylinder body; the suction cylinder sleeve is arranged on the lower pressure plate and is positioned in the through type valve hole; the suction valve group is arranged on the suction cylinder sleeve; the middle spacer sleeve is arranged in the straight-through valve hole and positioned at the upper end of the suction valve group; the discharge valve group is arranged at the upper end of the middle spacing sleeve; the discharge cylinder sleeve is arranged at the upper end of the discharge valve group, and the upper pressure plate covers the other end of the hydraulic cylinder body; at least part of the liquid discharging assembly penetrates through the lower pressure plate and is arranged in the through type valve hole. The straight-through valve hole formed in the cylinder body at the hydraulic end of the reciprocating pump has the advantages of good sealing effect, convenience in processing, long service life, safety and reliability.
Description
Technical Field
The invention relates to the technical field of reciprocating pumps, in particular to a hydraulic end of a reciprocating pump.
Background
The hydraulic end of the reciprocating pump is the core of the reciprocating plunger pump and is a key part for energy conversion. The hydraulic end of the reciprocating pump is separated from the horizontal hydraulic end according to the structural form, and the final form is determined according to the medium and the use working condition. The vertical hydraulic end is divided into a conical valve hole hydraulic end and a straight-through stepped valve hole hydraulic end due to different sealing forms of the valve hole. The valve hole precision of the hydraulic end of the conical valve hole is high, the sealing effect is good, and the installation is simple; the processing technology is complex, the number of matched tool clamps is large, and the production cost is high. The straight-through stepped valve hole hydraulic end is sealed through the rubber part, the form is simple and practical, the processing is simple, the manufacturing cost is lower, the application range is wider, and the following problems are found in the long-term use process:
1. the sealed face processing degree of difficulty of the cascaded fluid end fluid cylinder body valve opening lower extreme of direct is big, and the roughness is unsatisfied to require, and sealed effect is not good, causes the high pressure to leak, leads to the pump head crackle to appear.
2. The straight-through stepped hydraulic end has no liquid discharge, and the pump repair is inconvenient and has potential safety hazard.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the hydraulic end of the reciprocating pump, the straight-through valve hole is formed in the hydraulic cylinder body of the hydraulic end of the reciprocating pump, the lower pressing plate is in a stepped flange shape, end face machining can be omitted, the contact area of the lower pressing plate and the hydraulic cylinder body can be ensured, the sealing effect is improved, liquid can be discharged from the hydraulic end of the reciprocating pump through the arrangement of the liquid discharging assembly, and the use is safer.
To achieve the above object, there is provided according to an aspect of the present invention a reciprocating pump fluid end, including: the liquid cylinder body, the upper pressure plate, the discharge cylinder sleeve, the discharge valve group, the middle spacer sleeve, the suction valve group, the suction cylinder sleeve, the lower pressure plate and the liquid discharge assembly;
the hydraulic cylinder comprises a cylinder body, a lower pressing plate and a hydraulic cylinder body, wherein a through valve hole is formed in the cylinder body, the lower pressing plate is in a stepped flange shape, the small outer circle end face of the lower pressing plate is arranged in the through valve hole, and the large outer circle end face of the lower pressing plate covers the cylinder body so as to seal one end of the cylinder body; the suction cylinder sleeve is arranged on the lower pressure plate and is positioned in the through type valve hole; the suction valve group is arranged on the suction cylinder sleeve; the middle spacer sleeve is arranged in the straight-through valve hole and positioned at the upper end of the suction valve group; the discharge valve group is arranged at the upper end of the middle spacing sleeve; the discharge cylinder sleeve is arranged at the upper end of the discharge valve group, and the upper pressure plate covers the other end of the hydraulic cylinder body;
wherein at least a portion of the tapping assembly passes through the lower platen and is disposed within the through valve bore.
Preferably, the reciprocating pump fluid end further comprises: a first fastening assembly, the first fastening assembly comprising: the hydraulic cylinder comprises a first bolt, a first nut and a first washer, the first bolt penetrates through the lower pressing plate and is screwed on the hydraulic cylinder body, the first nut is screwed on the first bolt, and the first washer is located between the first nut and the lower pressing plate.
Preferably, the lower end surfaces of the lower pressure plate and the suction cylinder sleeve are sealed through a cloth clamping sealing gasket, and a first threaded positioning pin is arranged between the lower pressure plate and the suction cylinder sleeve, so that the through hole of the suction cylinder sleeve and the liquid inlet hole of the liquid cylinder body are coaxial.
Preferably, the suction valve block comprises: the first valve cover is arranged on the suction valve seat, one end of the first valve spring is connected to the suction valve seat, the first valve core is connected to the other end of the first valve spring, the arrangement direction of the first valve core faces the suction cylinder sleeve, and the suction cylinder sleeve and the suction valve seat are sealed through a cloth clamping sealing gasket.
Preferably, the discharge valve block comprises: the hydraulic cylinder comprises a second valve cover, a second valve core, a discharge valve seat and a second valve spring, wherein the second valve cover is arranged on the discharge valve seat, one end of the second valve spring is connected to the discharge valve seat, the second valve core is connected to the other end of the second valve spring, the arrangement direction of the second valve core faces the middle spacer sleeve, the middle spacer sleeve and the discharge valve seat are sealed through cloth clamping gaskets, and a second threaded positioning pin is arranged between the middle spacer sleeve and the discharge valve seat, so that a transverse through hole of the middle spacer sleeve is coaxial with a transverse hole of the hydraulic cylinder body.
Preferably, a cloth clamping sealing gasket is arranged between the discharge cylinder sleeve and the upper pressure plate, and a third threaded positioning pin is arranged between the discharge cylinder sleeve and the upper pressure plate, so that the through hole of the discharge cylinder sleeve and the liquid discharge through hole of the hydraulic cylinder body are coaxial.
Preferably, the reciprocating pump fluid end further comprises: a second fastening assembly, the second fastening assembly comprising: the second bolt penetrates through the upper pressure plate and is screwed on the hydraulic cylinder body, the second nut is screwed on the second bolt, and the second washer is located between the second nut and the upper pressure plate.
Preferably, the tapping assembly comprises: the liquid discharging valve comprises a liquid discharging valve core, a liquid discharging valve cover and a liquid discharging valve spring, wherein a liquid discharging hole is formed in the lower pressing plate, the liquid discharging valve cover covers the liquid discharging hole, one end of the liquid discharging valve spring is connected to the liquid discharging valve cover, and the other end of the liquid discharging valve spring is connected to the liquid discharging valve core.
Preferably, the reciprocating pump fluid end further comprises: and at least part of the high-pressure exhaust assembly penetrates through the upper pressure plate and is arranged in the through valve hole.
The invention has the beneficial effects that:
the straight-through valve hole is formed in the hydraulic cylinder body of the double-pump hydraulic end, the lower pressing plate is in a stepped flange shape, end face machining can be omitted, the contact area of the lower pressing plate and the hydraulic cylinder body can be guaranteed, the sealing effect is improved, liquid can be discharged from the reciprocating pump hydraulic end through the liquid discharging assembly, and the use is safer.
Drawings
FIG. 1 is a schematic diagram of the configuration of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention.
FIG. 2 is a side view of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention.
FIG. 3 is a top view of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention.
Fig. 4 is a bottom view of the open hydraulic end of the reciprocating pump of one embodiment of the present invention.
Fig. 5 is a schematic diagram of the construction of the lower platen of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention.
FIG. 6 is a cross-sectional view of the lower platen of the hydraulic end of the reciprocating pump of one embodiment of the present invention.
FIG. 7 is a schematic diagram of the structure of a suction liner for the hydraulic end of a reciprocating pump in accordance with an embodiment of the present invention.
FIG. 8 is a cross-sectional view of a suction liner of the hydraulic end of a reciprocating pump of one embodiment of the present invention.
Fig. 9 is a schematic diagram of the construction of the intermediate spacer sleeve of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention.
FIG. 10 is a cross-sectional view of a center spacer sleeve of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention.
Fig. 11 is a schematic diagram of a discharge valve block for the hydraulic side of a reciprocating pump in accordance with an embodiment of the present invention.
Fig. 12 is a cross-sectional view of a suction valve block at the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention.
FIG. 13 is a schematic diagram of the discharge liner of the hydraulic end of the reciprocating pump of one embodiment of the present invention.
FIG. 14 is a cross-sectional view of a discharge bore liner of the hydraulic end of a reciprocating pump of one embodiment of the present invention.
FIG. 15 is a schematic diagram of the construction of the upper platen of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention.
FIG. 16 is a cross-sectional view of the upper platen of the hydraulic end of the reciprocating pump of one embodiment of the present invention.
Description of reference numerals:
the hydraulic cylinder comprises a hydraulic cylinder body 1, an upper pressure plate 2, a discharge cylinder sleeve 3, a discharge valve group 4, a middle spacer sleeve 5, a suction valve group 6, a suction cylinder sleeve 7, a lower pressure plate 8, a liquid discharge assembly 9, a first fastening assembly 10, a first valve cover 11, a first valve core 12, a suction valve seat 13, a first valve spring 14, a second valve cover 15, a second valve core 16, a discharge valve seat 17, a second valve spring 18, a second fastening assembly 29, a high-pressure exhaust assembly 20, a liquid discharge hole 21 and a liquid inlet hole 22.
Detailed Description
The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the configuration of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. FIG. 2 is a side view of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. FIG. 3 is a top view of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. Fig. 4 is a bottom view of the open hydraulic end of the reciprocating pump of one embodiment of the present invention. Fig. 5 is a schematic diagram of the construction of the lower platen of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention. FIG. 6 is a cross-sectional view of the lower platen of the hydraulic end of the reciprocating pump of one embodiment of the present invention. FIG. 7 is a schematic diagram of the structure of a suction liner for the hydraulic end of a reciprocating pump in accordance with an embodiment of the present invention. FIG. 8 is a cross-sectional view of a suction liner of the hydraulic end of a reciprocating pump of one embodiment of the present invention. Fig. 9 is a schematic diagram of the construction of the intermediate spacer sleeve of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention. FIG. 10 is a cross-sectional view of a center spacer sleeve of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. Fig. 11 is a schematic diagram of a discharge valve block for the hydraulic side of a reciprocating pump in accordance with an embodiment of the present invention. Fig. 12 is a cross-sectional view of a suction valve block at the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. FIG. 13 is a schematic diagram of the discharge liner of the hydraulic end of the reciprocating pump of one embodiment of the present invention. FIG. 14 is a cross-sectional view of a discharge bore liner of the hydraulic end of a reciprocating pump of one embodiment of the present invention. FIG. 15 is a schematic diagram of the construction of the upper platen of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention. FIG. 16 is a cross-sectional view of the upper platen of the hydraulic end of the reciprocating pump of one embodiment of the present invention.
As shown in fig. 1 to 16, according to a first aspect of the present invention, there is provided a reciprocating pump fluid end comprising: the device comprises a hydraulic cylinder body 1, an upper pressure plate 2, a discharge cylinder sleeve 3, a discharge valve group 4, a middle spacer sleeve 5, a suction valve group 6, a suction cylinder sleeve 7, a lower pressure plate 8 and a liquid discharging assembly 9;
wherein, a straight-through valve hole is formed in the liquid cylinder body 1, the lower pressing plate 8 is in a stepped flange shape, the small excircle end face of the lower pressing plate 8 is arranged in the straight-through valve hole, and the large excircle end face of the lower pressing plate 8 covers the liquid cylinder body 1 to seal one end of the liquid cylinder body 1; the suction cylinder sleeve 7 is arranged on the lower pressure plate 8 and is positioned in the through type valve hole; the suction valve group 6 is arranged on the suction cylinder sleeve 7; the middle spacer sleeve 5 is arranged in the straight-through valve hole and positioned at the upper end of the suction valve group 6; the discharge valve group 4 is arranged at the upper end of the middle spacing sleeve 5; the discharge cylinder sleeve 3 is arranged at the upper end of the discharge valve group 4, and the upper pressure plate 2 covers the other end of the hydraulic cylinder body 1;
wherein at least part of the tapping assembly 9 passes through the lower pressure plate 8 and is arranged in the through valve hole.
The straight-through valve hole is formed in the hydraulic cylinder body 1 of the double-pump hydraulic end, the lower pressing plate 8 is in a stepped flange shape, end face machining can be omitted, the contact area of the lower pressing plate 8 and the hydraulic cylinder body 1 can be guaranteed, the sealing effect is improved, liquid can be discharged from the hydraulic end of the reciprocating pump through the liquid discharging assembly 9, and the use is safer.
In the double-pump hydraulic end provided by the invention, the upper end of a suction valve group 6 is provided with a middle spacer sleeve 5, the upper end and the lower end of the large excircle of the middle spacer sleeve 5 are in clearance positioning installation with a valve hole of a hydraulic cylinder body 1, and the middle size of the large excircle is less than 0.5mm of the excircle; the middle spacer sleeve 5 is designed into a stepped through hole in the length direction, and a counter bore at the lower end is larger than a through hole at the upper end, so that the smoothness of overflowing is ensured; a through hole is designed on the cylindrical surface of the middle spacer sleeve 5 and is drilled through the stepped through hole without drilling through; the upper end face of the middle spacer sleeve 5 is provided with a threaded hole and a cylindrical surface via hole for position relation design, and the via hole is ensured to be coaxial with the transverse via hole of the liquid cylinder body 1 during installation.
As the preferred technical scheme, the hydraulic end of the reciprocating pump also comprises: a first fastening component 10, the first fastening component 10 comprising: the hydraulic cylinder comprises a first bolt, a first nut and a first washer, wherein the first bolt penetrates through the lower pressing plate 8 and is screwed on the hydraulic cylinder body 1, the first nut is screwed on the first bolt, and the first washer is located between the first nut and the lower pressing plate 8.
According to the invention, the hydraulic end cylinder body 1 of the reciprocating pump adopts a straight-through design, so that the end face processing is omitted, and the valve hole clearance groove design is added according to the installation positions of the valve group and corresponding accessories, so that the processing and the installation are convenient; threaded holes are machined in the upper end face and the lower end face of the hydraulic cylinder body 1; a lower pressing plate 8 is arranged on the lower end face of the hydraulic cylinder body 1, the lower pressing plate 8 is designed to be a stepped flange, the small excircle of the lower pressing plate 8 is arranged with a small gap of a valve hole of the hydraulic cylinder body 1, the end face chute of the small excircle is designed, and a positioning pin hole is processed on the end face; the large outer circle of the lower pressing plate 8 is designed according to a square circle, so that a contact surface and an installation space are ensured; the large end face of the lower pressing plate 8 is provided with 6 through holes for mounting a first bolt, a first nut and a first gasket to fasten the lower pressing plate 8 and the hydraulic cylinder body 1 together; the big end face center of the lower pressing plate 8 is provided with a stepped threaded hole, the lower end of the threaded hole is provided with a small-diameter through hole, and a tapping component 9 is arranged in the threaded hole.
As the preferred technical scheme, the lower end surfaces of the lower pressing plate 8 and the suction cylinder sleeve 7 are sealed through a cloth clamping sealing gasket, and a first threaded positioning pin is arranged between the lower pressing plate 8 and the suction cylinder sleeve 7, so that the through hole of the suction cylinder sleeve 7 is coaxial with the liquid inlet hole of the liquid cylinder body 1.
In the technical scheme, a suction valve sleeve is arranged at the upper end of a lower pressing plate 8, the excircle of a suction cylinder sleeve 7 is in small clearance fit with a valve hole of a hydraulic cylinder body 1, threads are designed on the lower end surface of the suction cylinder sleeve, and a first screw positioning pin is arranged on the lower end surface of the suction cylinder sleeve; the inner hole of the suction cylinder sleeve 7 is designed in a stepped manner, a large inner hole at the upper end surface is used for liquid to flow out, and a small threaded hole at the lower end is convenient to disassemble and discharge liquid; a through hole is designed on the cylindrical surface of the suction cylinder sleeve 7, the through hole is in a position relation with a first thread positioning pin on the lower end surface, and the first thread positioning pin is positioned and installed with a small hole of the lower pressing plate 8, so that the suction valve sleeve is prevented from rotating, and smooth liquid inlet is ensured; the lower end face is sealed with the outer circle through a cloth clamping sealing gasket on the lower pressing plate 8, and the sealing reliability is guaranteed.
As a preferred solution, the suction valve group 6 comprises: the valve comprises a first valve cover 11, a first valve core 12, a suction valve seat 13 and a first valve spring 14, wherein the first valve cover 11 is arranged on the suction valve seat 13, one end of the first valve spring 14 is connected to the suction valve seat 13, the first valve core 12 is connected to the other end of the first valve spring 14, the arrangement direction of the first valve core 12 faces the suction cylinder sleeve 7, and the suction cylinder sleeve 7 and the suction valve seat 13 are sealed through cloth clamping gaskets.
In the technical scheme, the upper end of the suction valve sleeve is provided with a suction valve group 6, and the suction valve group 6 consists of a first valve cover 11, a first valve core 12, a suction valve seat 13 and a first valve spring 14. The large excircle of the suction valve seat 13 and the small gap of the valve hole of the liquid cylinder body 1 are positioned and installed, and the large end face chute is provided with a clamping dense pad to seal the upper end face of the suction valve seat and the valve hole of the liquid cylinder body 1; the upper end of the suction valve seat 13 is designed into a thread and a spigot, the diameter of the spigot excircle is 1mm larger than that of the thread, the inner hole is designed into a through hole to ensure the suction performance, the upper end surface of the inner hole is designed into a 90-degree linear seal, and the coaxiality of a spigot, the thread and a 90-degree seal surface is ensured during processing; the first valve core 12 is designed in a 90-degree conical surface step mode, the lower end of a large excircle is designed with a 90-degree conical surface and is in linear sealing with the upper end of an inner hole of a suction valve seat 13 by 90 degrees, and the upper-end stepped small excircle is sequentially positioned and guided and mounted with a first valve spring 14 and an inner hole of a guide sleeve of a first valve cover 11; the inner thread design of the upper end surface of the small excircle of the first valve core 12 is convenient for disassembly and assembly; an inner hole at the lower end of the first valve spring 14 is positioned and installed with a large excircle at the upper end of the first valve core 12, and an inner hole at the upper end of the first valve spring 14 is positioned and installed with an inner spigot of the first valve cover 11; the lower end face of the excircle of the first valve bonnet 11 is positioned and installed with a small gap of a valve hole of the hydraulic cylinder body 1, the upper end of the excircle of the first valve bonnet 11 is designed as a blank cutter, and the diameter size of the blank cutter is 0.5mm smaller than the large excircle of the valve bonnet; the inner hole of the valve cover is designed in a stepped manner, so that the installation and working space of the first valve core 12 is ensured; a spigot, a threaded hole, a counter bore, a through hole and a raised step are designed in the inner hole of the first valve cover 11; the sizes of the spigot and the thread are the same as those of the suction valve seat 13, the length size is 1mm larger than that of the spigot and the thread of the suction valve seat 13, and the inner diameter size of the counter bore is the same as that of the small diameter of the thread and is about 20mm larger than the large outer circle of the first valve core 12; the through hole and the valve cover guide sleeve have the same outer diameter and are arranged in an interference fit manner; the small excircle of the convex step is about 0.5mm smaller than the inner diameter of the first valve spring 14; the position size of the lower end face of the convex step and the upper end face of the big outer circle of the first valve core 12 is 8mm, and the first valve core 12 can work normally and also has the function of a limiter. A plurality of through holes are uniformly distributed on the upper end surface of the first valve cover 11 and are communicated with counter bores of the first valve cover 11, so that smooth overflowing is ensured; the guide sleeve is made of wear-resistant bronze, an inner hole is matched with a small excircle at the upper end of the first valve core 12, and a gap is 0.03mm-0.1mm (selected according to different media), so that the first valve core 12 is guided, and the first valve core 12 and the first valve cover 11 are protected.
As shown in fig. 2, the cylinder body is provided with a drain hole 21 and a liquid inlet hole 22.
Preferably, the discharge valve group 4 comprises: the hydraulic cylinder comprises a second valve cover 15, a second valve core 16, a discharge valve seat 17 and a second valve spring 18, wherein the second valve cover 15 is arranged on the discharge valve seat 17, one end of the second valve spring 14 is connected to the discharge valve seat 17, the second valve core 16 is connected to the other end of the second valve spring 18, the arrangement direction of the second valve core 16 faces to the middle spacer sleeve 5, the middle spacer sleeve 5 and the discharge valve seat 17 are sealed through cloth-sandwiched gaskets, and a second threaded positioning pin is arranged between the middle spacer sleeve 5 and the discharge valve seat 17, so that a transverse through hole of the middle spacer sleeve 5 is coaxial with a transverse hole of the hydraulic cylinder body 1.
In the technical scheme, the upper end of the middle spacer sleeve 5 is provided with the discharge valve group 4, and the discharge valve group 4 consists of a second valve cover 15, a second valve core 16, a discharge valve seat 17 and a second valve spring 18. The large excircle of the discharge valve seat 17 is positioned and installed with a small gap between the valve hole of the liquid cylinder body 1, the chute with the large end face is provided with a dense clamping pad for sealing with the upper end face of the middle spacer sleeve 5 and the valve hole of the liquid cylinder body 1, the pin hole is designed on the large end face and is positioned and installed with the threaded pin on the middle spacer sleeve 5, the middle spacer sleeve 5 is prevented from rotating, the liquid is ensured to be smooth, and the pressure build-up is prevented; the upper end of the discharge valve seat 17 is designed with a thread and a spigot, the diameter of the outer circle of the spigot is 1mm larger than that of the thread, the inner hole is designed with a through hole, and the diameter of the inner hole is 3mm smaller than that of the valve hole of the suction valve seat 13, so that the high-pressure flow rate is ensured; the upper end surface of the inner hole of the discharge valve seat 17 is designed in a 90-degree linear sealing mode, and the coaxiality of a spigot, a thread and a 90-degree sealing surface is ensured during machining; the second valve core 16 is designed in a 90-degree conical surface step mode, the lower end of a large excircle is designed with a 90-degree conical surface and is in linear sealing with the upper end of a 90-degree inner hole of the discharge valve seat 17, and the upper-end stepped small excircle is sequentially positioned and guided and mounted with the second valve spring 18 and the inner hole of a guide sleeve of the second valve cover 15; the inner thread design of the upper end surface of the small excircle of the second valve core 16 is convenient for disassembly and assembly; the inner hole at the lower end of the second valve spring 18 is positioned and installed with the large excircle at the upper end of the second valve core 16, and the inner hole at the upper end of the second valve spring 18 is positioned and installed with the inner spigot of the second valve cover 15; the lower end face of the excircle of the second valve cover 15 is positioned and installed with a small gap with a valve hole of the hydraulic cylinder body 1, the upper end of the excircle of the second valve cover 15 is designed as a blank cutter, and the diameter size of the blank cutter is 0.5mm smaller than the large excircle of the second valve cover 15; the inner hole of the second valve cover 15 is designed in a stepped manner, so that the installation and working space of the second valve core 16 is ensured; the inner hole of the second valve cover 15 is provided with a spigot, a threaded hole, a counter bore, a through hole and a raised step; the sizes of the spigot and the thread are the same as those of the suction valve seat 13, the length size is 1mm larger than that of the spigot and the thread of the suction valve seat 13, the inner diameter size of the counter bore is the same as that of the small diameter of the thread, and is about 20mm larger than the large outer circle of the second valve core 16; the through hole and the guide sleeve of the second valve cover 15 have the same outer diameter and are arranged in an interference fit manner; the small excircle of the convex step is about 0.5mm smaller than the inner diameter of the second valve spring 18; the position size of the lower end face of the convex step and the upper end face of the big outer circle of the second valve core 16 is 8mm, and the second valve core 16 can work normally and also has the function of a limiter. A plurality of through holes are uniformly distributed on the upper end surface of the second valve cover 15 and are communicated with counter bores of the second valve cover 15, so that smooth flow is ensured; the guide sleeve is made of wear-resistant bronze, an inner hole is matched with a small excircle at the upper end of the second valve core 16, and the gap is 0.03mm-0.1mm (selected according to different media), so that the second valve core 16 is guided, and the second valve core 16 and the second valve cover 15 are protected.
As the preferred technical scheme, a third threaded positioning pin is arranged between the discharge cylinder sleeve 3 and the upper pressure plate 2 through a cloth clamping sealing gasket, so that the through hole of the discharge cylinder sleeve 3 is coaxial with the liquid discharge through hole of the liquid cylinder body 1.
In the technical scheme, the upper end of a discharge valve group 4 is provided with a discharge cylinder sleeve 3, the upper end of the large excircle of the discharge cylinder sleeve 3 is in clearance positioning installation with a valve hole of a hydraulic cylinder body 1, and the size of the lower end of the large excircle is less than 0.5mm of the large excircle; the length direction of the discharge cylinder sleeve 3 is designed into a three-stage through hole, the through hole is gradually reduced while the strength and high pressure flow rate of the cylinder sleeve are ensured, and the through hole at the upper end is designed into a threaded hole, so that the discharge cylinder sleeve 3 is convenient to assemble and disassemble; a through hole is designed on the cylindrical surface of the discharge cylinder sleeve 3, and the through hole is installed opposite to the liquid discharge through hole of the liquid cylinder body 1 during installation, so that smooth liquid discharge is ensured; in order to prevent the drainage cylinder sleeve from rotating, a threaded hole is designed on the upper end surface of the drainage cylinder sleeve, and the drainage cylinder sleeve is in a position relation with the through hole on the cylindrical surface; an upper pressure plate 2 is arranged at the upper end of the discharge cylinder sleeve 3, the upper pressure plate 2 is designed to be a stepped flange, a small excircle and a valve hole of the hydraulic cylinder body 1 are arranged in a small gap, a chute is arranged on the end face of the small excircle, and a positioning pin hole is processed on the end face; the two sides of the large excircle of the upper pressure plate 2 are milled to be square, so that a contact surface and an installation space are ensured; 6 through holes are distributed on the large end face of the upper pressure plate 2, and the positioning pin holes and the 6 through holes are designed in position relation, so that the installation is convenient; the large end surface through hole of the upper pressure plate 2 is used for installing a bolt, a nut and a gasket to sequentially compress the components in the valve hole of the hydraulic cylinder body 1 and fasten the components with the hydraulic cylinder body 1; a step-type threaded hole is designed in the center of the large end face of the upper pressure plate 2, a small-diameter through hole is machined in the lower end of the threaded hole, and a gas discharging assembly is installed in the threaded hole; the liquid discharging assembly 9 consists of a gas discharging valve core and a gas discharging valve cover; the air release valve core is designed in a stepped manner by a large excircle and 90-degree conical surface, the diameter of the large excircle is larger than that of the through hole of the upper pressure plate 2, and the conical surface is in linear sealing with the end surface of the through hole of the upper pressure plate 2; the external thread of the deflation valve cover is tightly fixed with the threaded hole on the large end surface of the upper pressure plate 2, and the large excircle is in a hexagonal design, so that the pre-tightening installation is convenient; the small inner hole of the air release valve cover and the small outer circle of the air release valve core are installed in a guiding mode, and the sealing reliability of the valve core is guaranteed; the front end spigot of the deflation valve cover is contacted with the large stepped end face of the deflation valve core, the deflation valve core is firmly fastened through threaded connection, and meanwhile, the front end spigot of the deflation valve cover is provided with a deflation through groove, so that safe and smooth discharge of gas is ensured.
As the preferred technical scheme, the hydraulic end of the reciprocating pump also comprises: a second fastening assembly 19, the second fastening assembly 19 comprising: the second bolt penetrates through the upper pressure plate 2 and is screwed on the hydraulic cylinder body 1, the second nut is screwed on the second bolt, and the second washer is located between the second nut and the upper pressure plate 2.
As a preferred solution, the tapping assembly 9 comprises: the liquid discharging valve comprises a liquid discharging valve core, a liquid discharging valve cover and a liquid discharging valve spring, wherein a liquid discharging hole is formed in the lower pressing plate 8, the liquid discharging valve cover covers the liquid discharging hole, one end of the liquid discharging valve spring is connected to the liquid discharging valve cover, and the other end of the liquid discharging valve spring is connected to the liquid discharging valve core.
In the technical scheme, the liquid discharging assembly 9 consists of a liquid discharging valve core, a liquid discharging valve cover and a liquid discharging valve spring; the liquid discharging valve core is designed in a stepped manner by a large outer circle and 90-degree conical surface, the diameter of the large outer circle is larger than that of the through hole of the lower pressing plate 8, and the conical surface is in linear sealing with the end surface of the through hole of the lower pressing plate 8; threads are designed on the end surface of the small excircle at the upper end of the liquid discharging valve core, so that a liquid discharging tool is convenient to mount; a liquid discharging spring is arranged on the small excircle of the liquid discharging valve core and is positioned and arranged with the inner hole of the liquid discharging valve spring, and a liquid discharging valve cover is arranged on the other side of the liquid discharging valve spring; the external thread of the tapping valve cover is tightly installed with the threaded hole on the large end face of the lower pressing plate 8, and the large outer circle is in a hexagonal design and is convenient to pre-tighten and install; the small inner hole of the liquid discharge valve cover and the small outer circle of the liquid discharge valve core are installed in a guiding mode, and the sealing reliability of the valve core is guaranteed; the design of a small counter bore in the center of the upper end of the liquid discharge valve cover; the guidance resistance of the liquid discharging valve core is ensured, and the guidance is prevented from being blocked; a plurality of tapping holes are uniformly distributed at the upper end of the tapping valve cover, and a large counter bore is designed in the end face, so that the drilling length is reduced, and the smoothness of tapping is ensured.
As the preferred technical scheme, the hydraulic end of the reciprocating pump also comprises: and a high-pressure exhaust assembly 20, wherein at least part of the high-pressure exhaust assembly 20 penetrates through the upper pressure plate 2 and is arranged in the through valve hole.
Example 1
FIG. 1 is a schematic diagram of the configuration of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. FIG. 2 is a side view of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. FIG. 3 is a top view of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. Fig. 4 is a bottom view of the open hydraulic end of the reciprocating pump of one embodiment of the present invention. Fig. 5 is a schematic diagram of the construction of the lower platen of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention. FIG. 6 is a cross-sectional view of the lower platen of the hydraulic end of the reciprocating pump of one embodiment of the present invention. FIG. 7 is a schematic diagram of the structure of a suction liner for the hydraulic end of a reciprocating pump in accordance with an embodiment of the present invention. FIG. 8 is a cross-sectional view of a suction liner of the hydraulic end of a reciprocating pump of one embodiment of the present invention. Fig. 9 is a schematic diagram of the construction of the intermediate spacer sleeve of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention. FIG. 10 is a cross-sectional view of a center spacer sleeve of the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. Fig. 11 is a schematic diagram of a discharge valve block for the hydraulic side of a reciprocating pump in accordance with an embodiment of the present invention. Fig. 12 is a cross-sectional view of a suction valve block at the hydraulic end of a reciprocating pump in accordance with one embodiment of the present invention. FIG. 13 is a schematic diagram of the discharge liner of the hydraulic end of the reciprocating pump of one embodiment of the present invention. FIG. 14 is a cross-sectional view of a discharge bore liner of the hydraulic end of a reciprocating pump of one embodiment of the present invention. FIG. 15 is a schematic diagram of the construction of the upper platen of the hydraulic end of the reciprocating pump in accordance with one embodiment of the present invention. FIG. 16 is a cross-sectional view of the upper platen of the hydraulic end of the reciprocating pump of one embodiment of the present invention.
As shown in fig. 1 to 16, according to a first aspect of the present invention, there is provided a reciprocating pump fluid end comprising: the device comprises a hydraulic cylinder body 1, an upper pressure plate 2, a discharge cylinder sleeve 3, a discharge valve group 4, a middle spacer sleeve 5, a suction valve group 6, a suction cylinder sleeve 7, a lower pressure plate 8 and a liquid discharging assembly 9;
wherein, a straight-through valve hole is formed in the liquid cylinder body 1, the lower pressing plate 8 is in a stepped flange shape, the small excircle end face of the lower pressing plate 8 is arranged in the straight-through valve hole, and the large excircle end face of the lower pressing plate 8 covers the liquid cylinder body 1 to seal one end of the liquid cylinder body 1; the suction cylinder sleeve 7 is arranged on the lower pressure plate 8 and is positioned in the through type valve hole; the suction valve group 6 is arranged on the suction cylinder sleeve 7; the middle spacer sleeve 5 is arranged in the straight-through valve hole and positioned at the upper end of the suction valve group 6; the discharge valve group 4 is arranged at the upper end of the middle spacing sleeve 5; the discharge cylinder sleeve 3 is arranged at the upper end of the discharge valve group 4, and the upper pressure plate 2 covers the other end of the hydraulic cylinder body 1;
wherein at least part of the tapping assembly 9 passes through the lower pressure plate 8 and is arranged in the through valve hole.
Further, the reciprocating pump fluid end still includes: a first fastening component 10, the first fastening component 10 comprising: the hydraulic cylinder comprises a first bolt, a first nut and a first washer, wherein the first bolt penetrates through the lower pressing plate 8 and is screwed on the hydraulic cylinder body 1, the first nut is screwed on the first bolt, and the first washer is located between the first nut and the lower pressing plate 8.
Furthermore, the lower end surfaces of the lower pressing plate 8 and the suction cylinder sleeve 7 are sealed through a cloth clamping sealing gasket, and a first threaded positioning pin is arranged between the lower pressing plate 8 and the suction cylinder sleeve 7, so that the through hole of the suction cylinder sleeve 7 is coaxial with the liquid inlet hole of the liquid cylinder body 1.
Further, the suction valve group 6 comprises: the valve comprises a first valve cover 11, a first valve core 12, a suction valve seat 13 and a first valve spring 14, wherein the first valve cover 11 is arranged on the suction valve seat 13, one end of the first valve spring 14 is connected to the suction valve seat 13, the first valve core 12 is connected to the other end of the first valve spring 14, the arrangement direction of the first valve core 12 faces the suction cylinder sleeve 7, and the suction cylinder sleeve 7 and the suction valve seat 13 are sealed through cloth clamping gaskets.
Further, the discharge valve group 4 includes: the hydraulic cylinder comprises a second valve cover 15, a second valve core 16, a discharge valve seat 17 and a second valve spring 18, wherein the second valve cover 15 is arranged on the discharge valve seat 17, one end of the second valve spring 14 is connected to the discharge valve seat 17, the second valve core 16 is connected to the other end of the second valve spring 18, the arrangement direction of the second valve core 16 faces to the middle spacer sleeve 5, the middle spacer sleeve 5 and the discharge valve seat 17 are sealed through cloth-sandwiched gaskets, and a second threaded positioning pin is arranged between the middle spacer sleeve 5 and the discharge valve seat 17, so that a transverse through hole of the middle spacer sleeve 5 is coaxial with a transverse hole of the hydraulic cylinder body 1.
Further, a third threaded positioning pin is arranged between the discharge cylinder sleeve 3 and the upper pressure plate 2 through a cloth clamping sealing gasket, so that the through hole of the discharge cylinder sleeve 3 is coaxial with the liquid discharge through hole of the hydraulic cylinder body 1.
Further, the reciprocating pump fluid end still includes: a second fastening assembly 19, the second fastening assembly 19 comprising: the second bolt penetrates through the upper pressure plate 2 and is screwed on the hydraulic cylinder body 1, the second nut is screwed on the second bolt, and the second washer is located between the second nut and the upper pressure plate 2.
Further, the tapping assembly 9 comprises: the liquid discharging valve comprises a liquid discharging valve core, a liquid discharging valve cover and a liquid discharging valve spring, wherein a liquid discharging hole is formed in the lower pressing plate 8, the liquid discharging valve cover covers the liquid discharging hole, one end of the liquid discharging valve spring is connected to the liquid discharging valve cover, and the other end of the liquid discharging valve spring is connected to the liquid discharging valve core.
Further, the reciprocating pump fluid end still includes: and a high-pressure exhaust assembly 20, wherein at least part of the high-pressure exhaust assembly 20 penetrates through the upper pressure plate 2 and is arranged in the through valve hole.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A reciprocating pump fluid end, comprising: the liquid cylinder body, the upper pressure plate, the discharge cylinder sleeve, the discharge valve group, the middle spacer sleeve, the suction valve group, the suction cylinder sleeve, the lower pressure plate and the liquid discharge assembly;
the hydraulic cylinder comprises a cylinder body, a lower pressing plate and a hydraulic cylinder body, wherein a through valve hole is formed in the cylinder body, the lower pressing plate is in a stepped flange shape, the small outer circle end face of the lower pressing plate is arranged in the through valve hole, and the large outer circle end face of the lower pressing plate covers the cylinder body so as to seal one end of the cylinder body; the suction cylinder sleeve is arranged on the lower pressure plate and is positioned in the through type valve hole; the suction valve group is arranged on the suction cylinder sleeve; the middle spacer sleeve is arranged in the straight-through valve hole and positioned at the upper end of the suction valve group; the discharge valve group is arranged at the upper end of the middle spacing sleeve; the discharge cylinder sleeve is arranged at the upper end of the discharge valve group, and the upper pressure plate covers the other end of the hydraulic cylinder body;
wherein at least a portion of the tapping assembly passes through the lower platen and is disposed within the through valve bore.
2. The reciprocating pump fluid end of claim 1 further comprising: a first fastening assembly, the first fastening assembly comprising: the hydraulic cylinder comprises a first bolt, a first nut and a first washer, the first bolt penetrates through the lower pressing plate and is screwed on the hydraulic cylinder body, the first nut is screwed on the first bolt, and the first washer is located between the first nut and the lower pressing plate.
3. The hydraulic end of a reciprocating pump according to claim 2, wherein the lower end surface of the lower pressure plate and the suction cylinder sleeve are sealed by a cloth-sandwiched sealing gasket, and a first threaded positioning pin is arranged between the lower pressure plate and the suction cylinder sleeve, so that the through hole of the suction cylinder sleeve and the liquid inlet hole of the hydraulic cylinder body are coaxial.
4. The reciprocating pump fluid end of claim 1 wherein the suction valve block comprises: the first valve cover is arranged on the suction valve seat, one end of the first valve spring is connected to the suction valve seat, the first valve core is connected to the other end of the first valve spring, the arrangement direction of the first valve core faces the suction cylinder sleeve, and the suction cylinder sleeve and the suction valve seat are sealed through a cloth clamping sealing gasket.
5. The reciprocating pump fluid end of claim 1 wherein the bleed valve block comprises: the hydraulic cylinder comprises a second valve cover, a second valve core, a discharge valve seat and a second valve spring, wherein the second valve cover is arranged on the discharge valve seat, one end of the second valve spring is connected to the discharge valve seat, the second valve core is connected to the other end of the second valve spring, the arrangement direction of the second valve core faces the middle spacer sleeve, the middle spacer sleeve and the discharge valve seat are sealed through cloth clamping gaskets, and a second threaded positioning pin is arranged between the middle spacer sleeve and the discharge valve seat, so that a transverse through hole of the middle spacer sleeve is coaxial with a transverse hole of the hydraulic cylinder body.
6. The reciprocating pump fluid end according to claim 1, wherein a cloth-sandwiched gasket is disposed between the discharge cylinder liner and the upper platen, and a third threaded positioning pin is disposed between the discharge cylinder liner and the upper platen, so that the through hole of the discharge cylinder liner and the fluid discharge through hole of the fluid cylinder body are coaxial.
7. The reciprocating pump fluid end of claim 1 further comprising: a second fastening assembly, the second fastening assembly comprising: the second bolt penetrates through the upper pressure plate and is screwed on the hydraulic cylinder body, the second nut is screwed on the second bolt, and the second washer is located between the second nut and the upper pressure plate.
8. The reciprocating pump fluid end of claim 1 wherein the tapping assembly comprises: the liquid discharging valve comprises a liquid discharging valve core, a liquid discharging valve cover and a liquid discharging valve spring, wherein a liquid discharging hole is formed in the lower pressing plate, the liquid discharging valve cover covers the liquid discharging hole, one end of the liquid discharging valve spring is connected to the liquid discharging valve cover, and the other end of the liquid discharging valve spring is connected to the liquid discharging valve core.
9. The reciprocating pump fluid end of claim 1 further comprising: and at least part of the high-pressure exhaust assembly penetrates through the upper pressure plate and is arranged in the through valve hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495504.5A CN113074107A (en) | 2021-05-07 | 2021-05-07 | Hydraulic end of reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495504.5A CN113074107A (en) | 2021-05-07 | 2021-05-07 | Hydraulic end of reciprocating pump |
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| Publication Number | Publication Date |
|---|---|
| CN113074107A true CN113074107A (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110495504.5A Pending CN113074107A (en) | 2021-05-07 | 2021-05-07 | Hydraulic end of reciprocating pump |
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| CN (1) | CN113074107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117489583A (en) * | 2023-12-29 | 2024-02-02 | 宁波合力机泵股份有限公司 | Dense phase conveying CO 2 Low-clearance double-acting reciprocating pump hydraulic end of medium |
-
2021
- 2021-05-07 CN CN202110495504.5A patent/CN113074107A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117489583A (en) * | 2023-12-29 | 2024-02-02 | 宁波合力机泵股份有限公司 | Dense phase conveying CO 2 Low-clearance double-acting reciprocating pump hydraulic end of medium |
| CN117489583B (en) * | 2023-12-29 | 2024-04-19 | 宁波合力机泵股份有限公司 | Dense phase conveying CO2Low-clearance double-acting reciprocating pump hydraulic end of medium |
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