CN218934641U - Hydraulic end of high-pressure plunger pump - Google Patents
Hydraulic end of high-pressure plunger pump Download PDFInfo
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- CN218934641U CN218934641U CN202223076639.7U CN202223076639U CN218934641U CN 218934641 U CN218934641 U CN 218934641U CN 202223076639 U CN202223076639 U CN 202223076639U CN 218934641 U CN218934641 U CN 218934641U
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Abstract
The utility model discloses a high-pressure plunger pump hydraulic end which comprises a support, a plurality of groups of cylinder covers, a plurality of groups of stuffing boxes, a plurality of groups of high-pressure cylinders, a plurality of groups of combination valves, a pump head, a plunger, a plurality of studs, a plurality of gaskets and a plurality of nuts, wherein the support is arranged on the support; the support and the pump head are respectively arranged at two ends of a plunger hydraulic end of the high-pressure pump, and a cylinder cover, a stuffing box, a high-pressure cylinder and a combination valve are sequentially connected between the support and the pump head; the plunger penetrates through the cylinder cover and is in sliding connection with the stuffing box; the hydraulic end of the high-pressure plunger pump is not easy to cause fatigue damage, and the working efficiency can be effectively ensured.
Description
Technical Field
The utility model relates to the technical field of water jet, in particular to a hydraulic end of a high-pressure plunger pump.
Background
High-pressure reciprocating plunger pump, for short, plunger pump. The method is widely applied to various industries, such as metal surface rust removal, concrete removal, oil tank cleaning, scale removal of chemical reaction kettles, oilfield water injection, pressure vessel testing and the like. The plunger pump commonly used at present mainly comprises a power end and a hydraulic end, wherein the power end mainly comprises a crank case, a high-speed shaft, a crank shaft, a speed change gear ring, a connecting rod and a cross head and is used for converting the rotary motion of a prime motor into the linear reciprocating motion of the cross head; the hydraulic end mainly comprises a support, a cylinder cover, a stuffing box, a high-pressure cylinder, a plunger, a liquid inlet and outlet valve and a pump head, wherein the plunger is connected with the cross head and is used for converting the mechanical energy of linear reciprocating motion into the pressure energy of liquid. The linear reciprocating motion of the plunger brings about the cyclic opening and closing of the liquid inlet valve and the liquid outlet valve, and the medium always acts on alternating pressure inside the high-pressure cylinder.
For the high-pressure cylinder, two problems are easy to occur when the working pressure is higher than 100MPa, namely, the high-pressure cylinder, the combined valve seat and the box body are easy to cause material fatigue damage under the action of alternating expansion stress, and the O-shaped sealing ring is damaged to cause medium external leakage and internal leakage, so that the operation volumetric efficiency is reduced.
There is a need for a hydraulic end of a high-pressure plunger pump that is less prone to fatigue damage and effectively ensures working efficiency to solve the above-mentioned technical problems.
Disclosure of Invention
In order to solve the problems, the utility model provides the high-pressure plunger pump hydraulic end, which is not easy to cause fatigue damage and can effectively ensure the working efficiency.
The utility model solves the technical problems through the following technical scheme:
the utility model provides a hydraulic end of a high-pressure plunger pump, which comprises a bracket, a plurality of groups of cylinder covers, a plurality of groups of stuffing boxes, a plurality of groups of high-pressure cylinders, a plurality of groups of combination valves, a pump head, a plunger, a plurality of studs, a plurality of gaskets and a plurality of nuts, wherein the bracket is arranged on the bracket; the support and the pump head are respectively arranged at two ends of the high-pressure pump plunger hydraulic end, and the cylinder cover, the stuffing box, the high-pressure cylinder and the combination valve are sequentially connected between the support and the pump head; the plunger penetrates through the cylinder cover and is in sliding connection with the stuffing box; the cylinder cover consists of a cover body, a check ring, a clamping flange and a screw, wherein the central lines of the cover body, the check ring and the clamping flange are overlapped, the check ring is arranged in an inner hole of the cover body, the screw is used for fixing the clamping flange on the cover body, and the end face of the clamping flange is pressed on the end face of the check ring; the pump head is provided with a liquid inlet hole, a liquid inlet chamber and a liquid discharge hole, and the liquid inlet hole is communicated with the liquid inlet chamber; the high-pressure cylinder comprises a double-layer sleeve and a bushing, and the bushing is arranged in a central hole of the double-layer sleeve and is in sliding abutting joint with the double-layer sleeve; the combined valve consists of a combined valve seat, a liquid inlet valve plate, a liquid inlet spring, a liquid discharge valve core, a liquid discharge spring, a liquid discharge limiting seat, a high-pressure seal and a sealing ring, wherein the combined valve seat is arranged between the high-pressure cylinder and the pump head, one end of the combined valve seat is movably abutted against the liquid inlet valve plate, and the other end of the combined valve seat is abutted against the liquid discharge valve core and the liquid discharge limiting seat; the middle part of the combined valve seat is provided with a liquid discharge channel along the axial direction, two ends of the liquid discharge channel are respectively communicated with a conversion chamber and a liquid discharge chamber, the liquid discharge chamber is communicated with a liquid discharge hole of the pump head, one side of the liquid discharge valve core is movably abutted to the combined valve seat, the other side of the liquid discharge valve core is movably abutted to the liquid discharge limiting seat, and the liquid discharge valve core is movably arranged in a central hole of the liquid discharge limiting seat in a penetrating manner; a liquid discharge spring is arranged between the liquid discharge valve core and the limiting seat, one end of the liquid discharge spring is abutted against the liquid discharge valve core, and the other end of the liquid discharge spring is abutted against the limiting seat; the combined valve seat is provided with a plurality of inclined liquid inlet channels which are arranged in a radial shape and equidistant manner by taking the combined valve seat at the central position as the center, one end of each liquid inlet channel is communicated with a liquid inlet chamber, and the other end of each liquid inlet channel is connected with a conversion chamber; a liquid inlet spring is arranged between the liquid inlet valve plate and the bushing, one end of the liquid inlet spring is abutted against the bushing, and the other end of the liquid inlet spring is abutted against the liquid inlet valve plate; the packing box is arranged between the cylinder cover and the high-pressure cylinder and comprises a box body, a high-pressure sealing ring, a packing seal, a guide ring, a compression ring and a pre-tightening spring; the central hole of the box body is sequentially fixedly provided with a high-pressure sealing ring, a packing seal, a guide ring and a compression ring, and is mutually abutted with the respective end surfaces; the high-pressure sealing ring, the packing seal and the guide ring are sleeved on the periphery of the plunger and are in sliding connection with the plunger; the other end face of the compression ring is abutted against the end face of the pre-tightening spring, the other end face of the pre-tightening spring is abutted against the end face of an inner hole of a bushing of the high-pressure cylinder, and the right end face of the bushing is abutted against the end face of the combined valve seat; the left end face of the combined valve seat is abutted with the right end face of the double-layer sleeve, the left end face of the double-layer sleeve is abutted with the right end face of the box body, and the left end face of the box body is abutted with the right end face of the check ring; one surface of the high-pressure seal on the combined valve is abutted against the combined valve seat, and the other surface of the high-pressure seal is abutted against the pump head; a sealing ring is embedded on the cylindrical surface of the outermost layer of the combined valve seat and is abutted against the inner surface of the liquid inlet chamber of the pump head; the stud, nut and washer secure the pump head to the bracket.
Preferably, the double-layer sleeve consists of an outer sleeve and an inner sleeve, and central axes of the inner sleeve and the outer sleeve are coincident; after finishing the outer cylindrical surface of the inner sleeve and the inner hole surface of the outer sleeve, measuring the machining size, ensuring certain interference, heating the outer sleeve, generally, not exceeding 300 ℃, assembling the inner sleeve in the inner hole of the outer sleeve, and after cooling, carrying out finishing again on all the matching surfaces of the double-layer sleeve;
preferably, the combined valve seat consists of a valve body and a ferrule, and central axes of the valve body and the ferrule coincide; after the cylindrical surfaces of the valve body and the ferrule are matched with each other are subjected to finish machining, the machining size is measured, certain interference is ensured, the ferrule is heated, the temperature is generally not higher than 300 ℃, the valve body is assembled in an inner hole of the ferrule, and after cooling, all the matching surfaces of the combined valve seat 61 are subjected to finish machining again;
preferably, the letter body consists of a letter body outer ring and a letter body inner ring, and the central axes of the letter body outer ring and the letter body inner ring are coincided; after finishing the outer cylindrical surface of the inner ring of the box body and the inner hole surface of the outer ring of the box body, measuring the machining size, ensuring certain interference, heating the outer ring of the box body, generally, not exceeding 300 ℃, assembling the inner ring of the box body in the inner hole of the outer ring of the box body, and finishing all the matching surfaces of the box body again after cooling;
preferably, the cylinder cover, the stuffing box, the high-pressure cylinder and the combined valve are all 3 groups.
The working principle of the hydraulic end of the high-pressure plunger pump of the utility model is as follows:
when the plunger moves towards the direction far away from the combination valve, the volume of the conversion chamber gradually increases, so that negative pressure is generated, at the moment, a medium enters the liquid inlet channel through the liquid inlet and the liquid inlet chamber, the pressure of the medium acting on the liquid inlet valve plate is larger than the elastic force of the liquid inlet spring acting on the liquid inlet valve plate, the medium pushes away the liquid inlet valve plate and enters the conversion chamber, the liquid discharge valve core still tightly abuts against the end face of the combination valve body due to the negative pressure, the liquid discharge valve core is in a closed state until the plunger stops moving the conversion chamber leftwards to be full of the medium, the liquid inlet valve plate abuts against the combination valve seat under the elastic force of the liquid inlet spring, and the medium in the liquid inlet channel is closed to enter the conversion chamber;
when liquid is discharged, the plunger moves towards the direction close to the combination valve, the volume of the conversion chamber is gradually reduced, the pressure of the conversion chamber is larger than that of the liquid discharge chamber, the liquid inlet valve plate is tightly abutted against the combination valve seat, a medium passes through the liquid discharge channel and pushes the liquid discharge valve core to move rightwards, the medium flows from the conversion chamber to the liquid discharge chamber, the liquid discharge chamber is communicated with the liquid discharge hole of the pump head, so that the medium is discharged, the plunger stops moving rightwards, the medium does not flow out from the conversion chamber, the liquid discharge valve core is abutted against the combination valve seat under the action of the elastic force of the liquid discharge spring, and therefore one working cycle is completed, and then the next cycle is entered;
the left end face of the combined valve seat is abutted with the right end face of the double-layer sleeve, the left end face of the double-layer sleeve is abutted with the right end face of the box body, the left end face of the box body is abutted with the right end face of the check ring, the high-pressure seal on the combined valve is realized, one face of the high-pressure seal is abutted with the combined valve seat, the other face of the high-pressure seal is abutted with the pump head, under the action of the pretightening force of the fastener stud, the gasket, the nut and the screw, the mutually abutted face interaction force is utilized, the gap is filled after the abutting face is slightly deformed, and the sealing effect is realized, so that the medium leakage is prevented. All the related high-pressure static seals adopt a hard sealing structure, and the structure has the advantages of high bearing pressure, expansion stress resistance, reliable sealing and long-term failure prevention.
The utility model has the positive progress effects that: the hydraulic end of the high-pressure plunger pump is not easy to cause fatigue damage, and the working efficiency can be effectively ensured.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural view of a hydraulic end of a high-pressure plunger pump according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a fluid end of a high pressure plunger pump according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a combination valve of a hydraulic end of a high-pressure plunger pump according to an embodiment of the present utility model;
FIG. 4 is a schematic structural view of a stuffing box of a hydraulic end of a high-pressure plunger pump according to an embodiment of the present utility model;
fig. 5 is a schematic structural view of a double-layer sleeve of a hydraulic end of a high-pressure plunger pump according to an embodiment of the present utility model.
Reference numerals illustrate:
1. a bracket; 2. A cylinder cover;
21. a cover body; 22. A retainer ring;
23. clamping the flange; 24. A screw;
3. a stuffing box; 31. A letter body;
311. an outer ring of the letter body; 312. An inner ring of the letter body;
32. a high pressure seal ring; 33. Sealing with filler;
34. a guide ring; 35. A compression ring;
36. a pre-tightening spring; 4. A high-pressure cylinder;
41. a double-layer sleeve; 411 jackets;
412. an inner sleeve; 42. a bushing;
401. a switching chamber; 5. A pump head;
501. a liquid inlet hole; 502. A liquid inlet chamber;
503. a liquid discharge hole; 6. A combination valve;
61. a combined valve seat; 611. A valve body;
612. a ferrule; 62. A liquid inlet valve plate;
63. a liquid inlet spring; 64. A liquid discharge valve core;
65. a liquid discharge spring; 66. A liquid discharge limit seat;
67. sealing under high pressure; 68. A seal ring;
601. a liquid inlet channel; 602. A liquid discharge channel;
603. a liquid discharge chamber; 7. A plunger;
8. a stud; 9. A gasket;
10. and (3) a nut.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
As shown in fig. 1, 2, 3, 4 and 5, the present embodiment provides a hydraulic end of a high-pressure plunger pump, which includes a bracket 1, a cylinder cover 2, a stuffing box 3, a high-pressure cylinder 4, a pump head 5, a combination valve 6, a plunger 7, a stud 8, a washer 9 and a nut 10. The support 1 and the pump head 5 are respectively arranged at two ends of the hydraulic end, three groups of cylinder covers 2, three groups of stuffing boxes 3, three groups of high-pressure cylinders 4 and three groups of combined valves 6 are sequentially arranged between the support 2 and the pump head 5, and the plunger 7 penetrates through the cylinder covers 2 and is in sliding connection with the stuffing boxes 3;
the cylinder cover 2 consists of a cover body 21, a check ring 22, a clamping flange 23 and screws 24, wherein the central lines of the cover body 21, the check ring 22 and the clamping flange 23 are overlapped, the check ring 22 is arranged in an inner hole of the cover body 21, the clamping flange 23 is fixed on the cover body 21 by a plurality of screws 24, and the end face of the clamping flange 23 is pressed on the end face of the check ring 22;
the pump head 5 is provided with a liquid inlet 501, a liquid inlet chamber 502 and a liquid discharge hole 503, and the liquid inlet 501 is communicated with the liquid inlet chamber 502;
the high-pressure cylinder 4 comprises a double-layer sleeve 41 and a bushing 42, wherein the bushing 42 is arranged in a central hole of the double-layer sleeve 41 and is in sliding abutting connection with the bushing 42;
the combination valve 6 consists of a combination valve seat 61, a liquid inlet valve plate 62, a liquid inlet spring 63, a liquid discharge valve core 64, a liquid discharge spring 65, a liquid discharge limiting seat 66, a high-pressure seal 67 and a sealing ring 68. The combined valve seat 61 is arranged between the high-pressure cylinder 4 and the pump head 5, one end of the combined valve seat is movably abutted against the liquid inlet valve plate 62, and the other end is abutted against the liquid discharge valve core 64 and the liquid discharge limiting seat 66. A liquid discharge channel 602 is axially formed in the middle of the combined valve seat 61, two ends of the liquid discharge channel 602 are respectively communicated with the conversion chamber 401 and the liquid discharge chamber 603, and the liquid discharge chamber 603 is communicated with a liquid discharge hole 503 of the pump head 5;
one side of the liquid draining valve core 64 is movably abutted against the combined valve seat 61, the other side is movably abutted against the liquid draining limiting seat 66, and the liquid draining valve core is movably penetrated into a central hole of the liquid draining limiting seat 66 so as to open and close the liquid draining channel 602. A drain spring 65 is arranged between the drain valve core 64 and the limiting seat 66, one end of the drain spring 65 is abutted against the drain valve core 64, the other end is abutted against the limiting seat 66, and the drain valve core 64 is kept to be abutted against the right end face of the combined valve seat 61 under the action of elastic force;
the combined valve seat 61 is provided with a plurality of inclined liquid inlet channels 601, the liquid inlet channels 601 are radially and equidistantly arranged by taking the central combined valve seat 61 as the center, one end of each liquid inlet channel 601 is communicated with the liquid inlet chamber 502, and the other end of each liquid inlet channel is connected with the conversion chamber 401;
a liquid inlet spring 63 is arranged between the liquid inlet valve plate 62 and the bushing 42, one end of the liquid inlet spring is abutted against the bushing 42, the other end of the liquid inlet spring is abutted against the liquid inlet valve plate 62, and the liquid inlet valve plate 62 is kept to be abutted against the left end face of the combined valve seat 61 under the action of elastic force so as to open and close the liquid inlet channel 601;
when the plunger 7 moves leftwards in the conversion chamber 401, the volume of the conversion chamber 401 gradually increases, so that negative pressure is generated, at the moment, the pressure of the medium in the liquid inlet channel 601 acting on the liquid inlet valve plate 62 is larger than the elastic force of the liquid inlet spring 63 acting on the liquid inlet valve plate 602, the medium pushes away the liquid inlet valve plate 62 and enters the conversion chamber 401 until the plunger 7 stops leftwards to move the conversion chamber 401 to be full of the medium, the liquid inlet valve plate 62 abuts against the combined valve seat 61 under the elastic force of the liquid inlet spring 63, and the medium in the liquid inlet channel 601 is closed to enter the conversion chamber 401;
when the plunger 7 moves rightward in the switching chamber 401, the volume of the switching chamber 401 becomes smaller gradually, the medium passes through the drain passage 602 and pushes the drain valve core 64 to move rightward, the medium flows from the switching chamber 401 to the drain chamber 603, and the drain chamber 603 communicates with the drain hole of the pump head 5, thereby discharging the medium. The plunger 7 stops moving rightwards, no medium flows out of the conversion chamber 401, and the liquid discharge valve core 64 is abutted with the combined valve seat 61 under the elastic force of the liquid discharge spring 65;
the three groups of liquid inlet chambers 502 are mutually communicated, which is beneficial to increasing the water inlet area and ensuring sufficient liquid inlet. The three groups of liquid discharging chambers 603 are mutually communicated, so that the sealing quantity can be reduced due to liquid discharging concentration, and the operation reliability is improved;
the packing box 3 is arranged between the cylinder cover 2 and the high-pressure cylinder 4, and comprises a box body 31, a high-pressure sealing ring 32, a packing seal 33, a guide ring 34, a compression ring 35 and a pre-tightening spring 36. The central hole of the box body 31 is sequentially fixedly provided with a high-pressure sealing ring 32, a packing seal 33, a guide ring 34 and a compression ring 35, and the end surfaces are mutually abutted. The high-pressure sealing ring 32, the packing seal 33 and the guide ring 34 are sleeved on the periphery of the plunger 7 and are in sliding connection with the plunger 7. A plurality of packing seals 33 may be used, and three packing seals 33 are provided in this embodiment. The other end face of the compression ring 35 is abutted against the end face of the pre-tightening spring 36, and the other end face of the pre-tightening spring 36 is abutted against the end face of the inner hole of the bushing 42 of the high-pressure cylinder 4. The spring constant of the pre-tightening spring 36 is larger than that of the liquid inlet spring 63, and the right end surface of the bushing 42 is abutted against the end surface of the combined valve seat 61. The pre-tightening spring 36 in a compressed state acts on the compression ring 35 to enable the packing seal 33 to be extruded and deformed, so that gaps between the packing seal 33 and the plunger 7 are filled, the sealing performance is improved, and the leakage amount of the packing seal 33 is reduced;
the double-layer sleeve 41 is composed of an outer sleeve 411 and an inner sleeve 412, and the central axes are coincident. After finishing the outer cylindrical surface of the inner sleeve 412 and the inner hole surface of the outer sleeve 411, measuring the machining size, ensuring a certain interference, heating the outer sleeve 411 at the temperature of not more than 300 ℃ generally, assembling the inner sleeve 412 in the inner hole of the outer sleeve 411, and after cooling, re-finishing all the matching surfaces of the double-layer sleeve 41;
the combined valve seat 61 is composed of a valve body 611 and a ferrule 612, with central axes coincident. After the cylindrical surfaces of the valve body 611 and the ferrule 612 are finished, the machining size is measured, a certain interference is ensured, then the ferrule 612 is heated, the temperature is generally not higher than 300 ℃, the valve body 611 is assembled in the inner hole of the ferrule 612, and after cooling, all the matching surfaces of the combined valve seat 61 are finished again;
the box 31 is composed of a box outer ring 311 and a box inner ring 312, and central axes are coincident. After finishing the outer cylindrical surface of the inner box ring 312 and the inner hole surface of the outer box ring 311, measuring the machining size, ensuring certain interference, heating the outer box ring 311 at the temperature of 300 ℃ or below, assembling the inner box ring 312 in the inner hole of the outer box ring 311, and finishing all the matching surfaces of the box 31 again after cooling;
the left end face of the combined valve seat 61 is abutted against the right end face of the double-layer sleeve 41, the left end face of the double-layer sleeve 41 is abutted against the right end face of the box 31, and the left end face of the box 31 is abutted against the right end face of the retainer ring 22. Under the action of the pretightening force of the fastener stud 8, the gasket 9, the nut 10 and the screw 24, the mutually abutted surfaces interact with each other, and gaps are filled after the abutting surfaces are slightly deformed, so that medium leakage is prevented, and a sealing effect is achieved;
the high-pressure seal 67 on the combined valve 6 is abutted against the combined valve seat 61 on one side and the pump head 5 on the other side, and under the action of the pretightening force of the fastener stud 8, the gasket 9 and the nut 10, the abutted surfaces interact with each other, and after micro deformation, gaps are filled in the abutted surfaces, so that the liquid inlet chamber 502 and the liquid outlet chamber 603 are isolated, and mutual leakage of media is prevented. The seal ring 68 is embedded on the outermost cylindrical surface of the combined valve seat 61 and is abutted against the inner surface of the liquid inlet chamber 502 of the pump head 5, so that medium leakage of the liquid inlet chamber 502 is prevented.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The hydraulic end of the high-pressure plunger pump is characterized by comprising a support, a plurality of groups of cylinder covers, a plurality of groups of stuffing boxes, a plurality of groups of high-pressure cylinders, a plurality of groups of combination valves, a pump head, a plunger, a plurality of studs, a plurality of gaskets and a plurality of nuts; the support and the pump head are respectively arranged at two ends of the hydraulic end of the high-pressure plunger pump, and the cylinder cover, the stuffing box, the high-pressure cylinder and the combination valve are sequentially connected between the support and the pump head; the plunger penetrates through the cylinder cover and is in sliding connection with the stuffing box; the cylinder cover consists of a cover body, a check ring, a clamping flange and a screw, wherein the central lines of the cover body, the check ring and the clamping flange are overlapped, the check ring is arranged in an inner hole of the cover body, the screw is used for fixing the clamping flange on the cover body, and the end face of the clamping flange is pressed on the end face of the check ring; the pump head is provided with a liquid inlet hole, a liquid inlet chamber and a liquid discharge hole, and the liquid inlet hole is communicated with the liquid inlet chamber; the high-pressure cylinder comprises a double-layer sleeve and a bushing, and the bushing is arranged in a central hole of the double-layer sleeve and is in sliding abutting joint with the double-layer sleeve; the combined valve consists of a combined valve seat, a liquid inlet valve plate, a liquid inlet spring, a liquid discharge valve core, a liquid discharge spring, a liquid discharge limiting seat, a high-pressure seal and a sealing ring, wherein the combined valve seat is arranged between the high-pressure cylinder and the pump head, one end of the combined valve seat is movably abutted against the liquid inlet valve plate, and the other end of the combined valve seat is abutted against the liquid discharge valve core and the liquid discharge limiting seat; the middle part of the combined valve seat is provided with a liquid discharge channel along the axial direction, two ends of the liquid discharge channel are respectively communicated with a conversion chamber and a liquid discharge chamber, the liquid discharge chamber is communicated with a liquid discharge hole of the pump head, one side of the liquid discharge valve core is movably abutted to the combined valve seat, the other side of the liquid discharge valve core is movably abutted to the liquid discharge limiting seat, and the liquid discharge valve core is movably arranged in a central hole of the liquid discharge limiting seat in a penetrating manner; a liquid discharge spring is arranged between the liquid discharge valve core and the limiting seat, one end of the liquid discharge spring is abutted against the liquid discharge valve core, and the other end of the liquid discharge spring is abutted against the limiting seat; the combined valve seat is provided with a plurality of inclined liquid inlet channels which are arranged in a radial shape and equidistant manner by taking the combined valve seat at the central position as the center, one end of each liquid inlet channel is communicated with a liquid inlet chamber, and the other end of each liquid inlet channel is connected with a conversion chamber; a liquid inlet spring is arranged between the liquid inlet valve plate and the bushing, one end of the liquid inlet spring is abutted against the bushing, and the other end of the liquid inlet spring is abutted against the liquid inlet valve plate; the packing box is arranged between the cylinder cover and the high-pressure cylinder and comprises a box body, a high-pressure sealing ring, a packing seal, a guide ring, a compression ring and a pre-tightening spring; the central hole of the box body is sequentially fixedly provided with a high-pressure sealing ring, a packing seal, a guide ring and a compression ring, and is mutually abutted with the respective end surfaces; the high-pressure sealing ring, the packing seal and the guide ring are sleeved on the periphery of the plunger and are in sliding connection with the plunger; the other end face of the compression ring is abutted against the end face of the pre-tightening spring, the other end face of the pre-tightening spring is abutted against the end face of an inner hole of a bushing of the high-pressure cylinder, and the right end face of the bushing is abutted against the end face of the combined valve seat; the left end face of the combined valve seat is abutted with the right end face of the double-layer sleeve, the left end face of the double-layer sleeve is abutted with the right end face of the box body, and the left end face of the box body is abutted with the right end face of the check ring; one surface of the high-pressure seal on the combined valve is abutted against the combined valve seat, and the other surface of the high-pressure seal is abutted against the pump head; a sealing ring is embedded on the cylindrical surface of the outermost layer of the combined valve seat and is abutted against the inner surface of the liquid inlet chamber of the pump head; the stud, nut and washer secure the pump head to the bracket.
2. A high pressure plunger pump fluid end as in claim 1, wherein said double sleeve is comprised of an outer sleeve and an inner sleeve, and wherein the central axes of the inner sleeve and the outer sleeve coincide.
3. A high pressure plunger pump fluid end as in claim 1, wherein said combination valve seat is comprised of a valve body and a ferrule with central axes coincident.
4. A high pressure plunger pump fluid end as in claim 1, wherein said body is comprised of an outer body ring and an inner body ring, with central axes coincident.
5. A high pressure plunger pump fluid end as in claim 1, wherein said cylinder head, stuffing box, high pressure cylinder and combination valve are all 3 sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223076639.7U CN218934641U (en) | 2022-11-21 | 2022-11-21 | Hydraulic end of high-pressure plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223076639.7U CN218934641U (en) | 2022-11-21 | 2022-11-21 | Hydraulic end of high-pressure plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN218934641U true CN218934641U (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223076639.7U Active CN218934641U (en) | 2022-11-21 | 2022-11-21 | Hydraulic end of high-pressure plunger pump |
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| CN (1) | CN218934641U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557249A (en) * | 2023-07-12 | 2023-08-08 | 山东名盾防爆装备科技有限公司 | Direct-discharge type constant-pressure liquid drainage emulsion pump |
-
2022
- 2022-11-21 CN CN202223076639.7U patent/CN218934641U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557249A (en) * | 2023-07-12 | 2023-08-08 | 山东名盾防爆装备科技有限公司 | Direct-discharge type constant-pressure liquid drainage emulsion pump |
| CN116557249B (en) * | 2023-07-12 | 2023-09-01 | 山东名盾防爆装备科技有限公司 | Direct-discharge type constant-pressure liquid drainage emulsion pump |
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