CN115573896A - Double-valve structure hydraulic end - Google Patents
Double-valve structure hydraulic end Download PDFInfo
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- CN115573896A CN115573896A CN202211276553.0A CN202211276553A CN115573896A CN 115573896 A CN115573896 A CN 115573896A CN 202211276553 A CN202211276553 A CN 202211276553A CN 115573896 A CN115573896 A CN 115573896A
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- 239000007788 liquid Substances 0.000 claims abstract description 144
- 238000009434 installation Methods 0.000 claims abstract description 65
- 239000012530 fluid Substances 0.000 claims description 20
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- 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
- F04B53/02—Packing the free space between cylinders and pistons
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a double-valve structure hydraulic end which comprises a pump body (1), wherein a plunger channel (11) and a valve installation channel (12) are arranged in the pump body (1) in a staggered mode, a piston body (13) is arranged in the plunger channel (11), the piston body (13) is connected with a plunger rod (14), the valve installation channel (12) penetrates through the pump body (1) along a straight line, a main liquid inlet valve (16) and an auxiliary liquid inlet valve (15) are arranged on one side, located at the staggered position of the plunger channel (11) and the valve installation channel (12), in the valve installation channel (12), and a main liquid discharge valve (17) and an auxiliary liquid discharge valve (18) are arranged on the other side, located at the staggered position of the plunger channel (11) and the valve installation channel (12), in the valve installation channel (12). The invention has the advantages of high pump efficiency, convenient maintenance and low total cost, and the volume of the pump body is minimized, thereby realizing mass production with high economic benefit.
Description
Technical Field
The invention relates to the technical field of reciprocating pumps, in particular to a double-valve structure hydraulic end.
Background
For a conventional reciprocating pump, a hydraulic end of the conventional reciprocating pump is generally in a single-pump single-valve structure, namely a pump body is provided with a valve body on the upper side and the lower side of a plunger channel and used for liquid inlet and liquid discharge respectively, but the hydraulic end of the single-pump single-valve structure has the defects that the diameter of a valve is large, the diameter of a flow channel is also large, the invalid volume in the whole pump body is large, and the pumping efficiency is not high. Particularly, when a medium with higher viscosity, such as a washing powder stock thick crude oil medium, is conveyed, due to high viscosity and consistency of the medium, the reciprocating pump with the structure of a single pump and a single valve is gradually eliminated by the market due to low conveying efficiency.
Therefore, the research and development of the double-valve structure fluid end reciprocating pump has a wide market prospect, the common double-valve structure fluid end on the market at present has a double-pump double-valve structure and a single-pump double-valve structure, the reciprocating pump fluid end of the double-pump double-valve structure has two pump bodies as the name implies, and each pump body is internally provided with two valves, specifically, the patent application CN 107956664A, which is the specification of the detergent slurry conveying pump fluid end, is shown in fig. 12, and is provided with a main pump body and a secondary pump body which are separated by a plunger channel, and each pump body is internally provided with two valve bodies.
At present, the best effect of conveying a medium with higher viscosity is a reciprocating pump with a structure of a single pump and double valves, and particularly, the best effect can refer to a patent application CN 112594152A which is a reciprocating type opposed valve hydraulic end slurry pump, wherein a pump body simultaneously comprises two suction valves and two discharge valves, the material cost of the reciprocating pump can be greatly reduced, the pump efficiency is also better, but the manufacturing cost of the structure is not low while the material cost of the reciprocating pump is reduced, because four valves are required to be installed in the pump body, three flow channels and four flow channels are respectively arranged at the upper side and the lower side of a plunger channel in the pump body, the pump body with larger volume needs to be selected, the processing difficulty of the pump body is larger, the processing time is longer, the qualification rate of a finished product is difficult to guarantee, the total cost is relatively higher, and the mass production difficulty is larger; in addition, more liquid is left between the valves on the same side of the plunger channel in the pump body and in the channel, so that the ineffective volume is relatively large, and the high pump efficiency is difficult to achieve. Therefore, the existing double-valve structure hydraulic end is difficult to simultaneously consider a plurality of factors such as pump efficiency, volume, cost and the like, and the mass production in the true sense cannot be realized.
Disclosure of Invention
The invention aims to provide a hydraulic end with a double-valve structure. The invention has the advantages of high pump efficiency, convenient maintenance and low total cost, and the volume of the pump body is minimized, thereby realizing mass production with high economic benefit.
The technical scheme of the invention is as follows: a double-valve structure hydraulic end comprises a pump body, wherein a plunger channel and a valve installation channel are arranged in the pump body in a staggered mode, a piston body is arranged in the plunger channel and connected with a plunger rod, the valve installation channel penetrates through the pump body along a straight line, a main liquid inlet valve and an auxiliary liquid inlet valve are arranged on one side, located at the staggered position of the plunger channel and the valve installation channel, in the valve installation channel, and a main liquid discharge valve and an auxiliary liquid discharge valve are arranged on the other side, located at the staggered position of the plunger channel and the valve installation channel, in the valve installation channel; the valve installation channel is internally provided with an auxiliary liquid inlet valve, a main liquid discharge valve and an auxiliary liquid discharge valve from bottom to top, the bottom of the main liquid inlet valve is provided with a limiting column for limiting the opening height of the valve core of the auxiliary liquid inlet valve, and the bottom of the auxiliary liquid discharge valve is provided with a limiting column for limiting the opening height of the valve core of the main liquid discharge valve.
Compared with the prior art, the invention has the beneficial effects that: the pump body of the hydraulic end is provided with only one plunger channel and one valve installation channel which are staggered with each other in total, the pump body is simple in structure and extremely convenient to process, wherein two liquid inlet valves and two liquid outlet valves are installed in the valve installation channel along straight lines, four valves are installed on the same central line, particularly, the two liquid inlet valves and the two liquid outlet valves are matched in pairs, and the bottom of the upper valve is provided with a limiting column for limiting the opening height of the lower valve; more importantly, the four valves are installed on the same central line, the space occupancy rate of the valve installation channel is high, gaps between the valves are compressed through the pairwise matching between the liquid inlet valve and between the liquid discharge valve and the liquid discharge valve, the invalid volume in the pump body is reduced, high pump efficiency can be achieved, meanwhile, the total length of the valve installation channel can be further compressed, the integral height of the pump body can be further reduced, and finally the volume of the pump body can be minimized.
In the aforementioned double-valve structure fluid end, the valve seats of the four valves, namely the auxiliary fluid inlet valve, the main fluid discharge valve and the auxiliary fluid discharge valve, all include one section of outer conical surface, the inner wall of the valve installation channel is provided with an inner conical surface matched with the outer conical surface, the inner wall of the valve installation channel and the valve seats of the four valves are connected in a positioning manner through the inner conical surface and the outer conical surface, and the four valves are all on the same central line.
In the hydraulic end with the double-valve structure, the minimum diameter of the outer conical surface on the valve seat of the auxiliary drain valve is greater than the maximum diameter of the outer conical surface on the valve seat of the main drain valve; the minimum diameter of the outer conical surface on the valve seat of the main liquid inlet valve is larger than the maximum diameter of the outer conical surface on the valve seat of the auxiliary liquid inlet valve.
In the hydraulic end with a double-valve structure, the minimum diameter of the outer conical surface on the valve seat of the main liquid discharge valve is greater than the maximum diameter of the outer conical surface on the valve seat of the main liquid inlet valve.
In the hydraulic end with the double-valve structure, valve covers are connected above the auxiliary drain valve and the main liquid inlet valve, and limiting columns for limiting the opening heights of the valve cores of the auxiliary drain valve and the main liquid inlet valve are arranged in the valve covers.
In the hydraulic end with the double-valve structure, the plunger channel and the valve installation channel are vertically arranged, an upper plug head which is propped against a valve cover of the auxiliary drain valve is arranged at the upper end of the valve installation channel, and the lower end of the valve installation channel is used for feeding liquid; one end of the plunger channel is connected with a front plug head and a front flange plate, the other end of the plunger channel is connected with a sealing box body arranged outside the pump body, and the plunger rod penetrates through the sealing box body to be arranged.
In the aforementioned fluid end with double valve structure, the fluid end is of a single-acting structure or a double-acting structure.
When the fluid end was single-action structure, the quantity of the pump body was one, valve installation passageway set up the end at the plunger passageway, and the lower extreme of valve installation passageway is connected with the feed liquor manifold.
When the hydraulic end is a double-acting structure, the number of the pump bodies is two, the pump comprises a front pump body and a rear pump body, valve installation channels of the front pump body and the rear pump body are arranged in parallel, plunger channels of the front pump body and the rear pump body are coaxially arranged, the front pump body and the rear pump body are connected through a hollow cylindrical cylinder sleeve base, the plunger channels which are communicated with the front pump body and the rear pump body inside the cylinder sleeve base form a main channel of reciprocating motion of the plunger rod, a cylinder sleeve is arranged on the inner wall of the cylinder sleeve base, a cylinder sleeve pressing sleeve which supports one end of the cylinder sleeve is arranged in the plunger channel of the front pump body, an indent which supports the other end of the cylinder sleeve is arranged on the outer end face of the rear pump body, the piston body reciprocates along the section of the length of the cylinder sleeve under the action of the plunger rod, and an annular acting cavity is formed between the cylinder sleeve and the plunger rod.
In the hydraulic end with the double-valve structure, when the hydraulic end is of a double-acting structure, the lower ends of the valve installation channels of the front pump body and the rear pump body are both connected with the combined water collecting manifold, a pressure stabilizing cavity is formed in the space between the front pump body and the rear pump body and outside the cylinder sleeve base, a liquid inlet manifold is connected to the side wall of the pressure stabilizing cavity, and the bottom of the pressure stabilizing cavity is communicated with the combined water collecting manifold.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the relative positions of the inlet manifold and the combined header manifold in view A of FIG. 1;
FIG. 3 is a schematic view of the structure of the pump body in embodiment 1;
FIG. 4 is a schematic view of the mounting structure of the primary and secondary drain valves in the front pump body;
FIG. 5 is a schematic view of the connection structure of the two ends of the plunger rod;
fig. 6 is a schematic diagram of the pump body structure in embodiment 2.
Reference numerals are as follows: 1-pump body, 10-front pump body, 11-plunger channel, 12-valve installation channel, 13-piston body, 14-plunger rod, 15-auxiliary liquid inlet valve, 16-main liquid inlet valve, 17-main liquid outlet valve, 18-auxiliary liquid outlet valve, 19-valve cover, 20-rear pump body, 30-sealing box body, 40-liquid inlet manifold, 50-cylinder sleeve base body, 60-cylinder sleeve, 70-cylinder sleeve pressing sleeve, 80-combined water collecting manifold, 90-pressure maintaining cavity, 101-upper plug head, 102-front plug head, 103-front flange plate, 104-pressing nut, 105-check nut, 106-centering ball, 107-snap ring, 108-connecting nut, 171-first valve seat, 172-first valve core, 181-second valve seat, 182-second valve core, 183-first limiting column, 184-first valve cover, 185-second limiting column, 301-flushing inner ring and 701-through hole.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1: a hydraulic end with a double-valve structure is applied to a reciprocating pump for conveying high-viscosity media, wherein the reciprocating pump can be designed into three cylinders, five cylinders and other different cylinders.
The double-valve structure hydraulic end is shown in fig. 1 to 5 and comprises a pump body 1, a plunger channel 11 and a valve installation channel 12 are arranged in the pump body 1 in a staggered mode, a piston body 13 is arranged in the plunger channel 11, the piston body 13 is connected with a plunger rod 14, the valve installation channel 12 penetrates through the pump body 1 along a straight line, a main liquid inlet valve 16 and an auxiliary liquid inlet valve 15 are arranged on one side, located at the staggered position of the plunger channel 11 and the valve installation channel 12, in the valve installation channel 12, and a main liquid discharge valve 17 and an auxiliary liquid discharge valve 18 are arranged on the other side, located at the staggered position of the plunger channel 11 and the valve installation channel 12, in the valve installation channel 12.
Preferably, an auxiliary liquid inlet valve 15, a main liquid inlet valve 16, a main liquid discharge valve 17 and an auxiliary liquid discharge valve 18 are arranged in the valve installation channel 12 from bottom to top, the main structures of the four valves are similar, a limiting column for limiting the opening height of the valve core of the auxiliary liquid inlet valve 15 is arranged at the bottom of the main liquid inlet valve 16, a limiting column for limiting the opening height of the valve core of the main liquid discharge valve 17 is arranged at the bottom of the auxiliary liquid discharge valve 18, and the limiting column determines the maximum opening height of each valve core.
The valve core of each valve can be a hemispherical valve core, a conical valve core, a flat valve core and the like, and can be arranged according to the requirement of conveying media.
Preferably, the valve seats of the four valves, namely the auxiliary liquid inlet valve 15, the main liquid inlet valve 16, the main liquid discharge valve 17 and the auxiliary liquid discharge valve 18, comprise a section of outer conical surface, the inner wall of the valve installation channel 12 is provided with an inner conical surface matched with the outer conical surface, the inner wall of the valve installation channel 12 and the valve seats of the four valves are connected in a positioning mode through the inner conical surface and the outer conical surface, the four valves are all on the same central line, and the double-conical-surface connection structure is beneficial to realizing positioning self-locking fixation between the valve seats of the valves and the inner wall of the valve installation channel 12.
The four valves are all arranged on the same central line, so that the machining precision can be improved, the hydraulic end is compact and convenient to assemble and disassemble, and the invalid volume is small; meanwhile, the overflow resistance of the medium in the cavity can be reduced, the efficiency is improved, and the device is more suitable for conveying the medium with high viscosity.
Preferably, the minimum diameter of the outer conical surface on the valve seat of the auxiliary drain valve 18 is larger than the maximum diameter of the outer conical surface on the valve seat of the main drain valve 17, the size design facilitates the installation of the drain valve, the main drain valve 17 and the auxiliary drain valve 18 can be positioned and installed in sequence, and the main drain valve 17 can be directly taken out from the position where the auxiliary drain valve 18 is installed without interference when being disassembled; the minimum diameter of the outer conical surface on the valve seat of the main liquid inlet valve 16 is larger than the maximum diameter of the outer conical surface on the valve seat of the auxiliary liquid inlet valve 15, the size design facilitates the installation of the liquid inlet valve, the auxiliary liquid inlet valve 15 and the main liquid inlet valve 16 can be positioned and installed in sequence, and the auxiliary liquid inlet valve 15 can be directly taken out from the position where the main liquid inlet valve 16 is installed without interference during the disassembly.
Preferably, the minimum diameter of the outer conical surface on the valve seat of the main drain valve 17 is larger than the maximum diameter of the outer conical surface on the valve seat of the main liquid inlet valve 16, when the condition is met, the four valves can be sequentially installed from the upper end of the valve installation channel 12 from scratch to the bottom, the auxiliary liquid inlet valve 15, the main liquid inlet valve 16, the main drain valve 17 and the auxiliary drain valve 18 are respectively installed in sequence, the operation of installing the four valves in the same valve installation channel 12 is realized, and the whole installation process is simple and convenient to operate.
Of course, the design that the size of the outer conical surface on the valve seat of the main drain valve 17 is related to the size of the outer conical surface on the valve seat of the main liquid inlet valve 16 is the optimal solution, and actually, when the size of the auxiliary liquid inlet valve 15 and the size of the main liquid inlet valve 16 are satisfied to be detachable from the plunger channel 11 (the end where the front plug 102 and the front flange plate 103 are located), the minimum diameter of the outer conical surface on the valve seat of the main drain valve 17 does not need to be larger than the maximum diameter of the outer conical surface on the valve seat of the main liquid inlet valve 16.
Preferably, valve covers 19 are connected above the auxiliary drain valve 18 and the main liquid inlet valve 16, the valve covers 19 are connected to valve seats of the auxiliary drain valve 18 and the main liquid inlet valve 16, specifically, inner threads of the valve covers 19 are screwed on threads of the valve seats, and limiting columns for limiting the opening heights of valve cores of the auxiliary drain valve 18 and the main liquid inlet valve 16 are arranged in the valve covers 19.
Since the structures of the secondary liquid inlet valve 15 and the primary liquid inlet valve 16 are almost similar to those of the primary liquid discharge valve 17 and the secondary liquid discharge valve 18 except for the dimensions, in this embodiment, only the mounting structures of the primary liquid discharge valve 17 and the secondary liquid discharge valve 18 are analyzed, and referring to fig. 4, it can be seen that the secondary liquid discharge valve 18 and the primary liquid discharge valve 17 are sequentially mounted in the valve mounting passage 12 at the upper position of the plunger passage 11 from top to bottom, the primary liquid discharge valve 17 includes a first valve seat 171 and a first valve core 172, the secondary liquid discharge valve 18 includes a second valve seat 181 and a second valve core 182, the first valve seat 171 and the second valve seat 181 are connected to the inner wall of the valve mounting passage 12 by a double-conical positioning connection manner, wherein a first limit post 183 is disposed at the bottom of the second valve seat 181, the opening height of the first valve core 172 can be limited, as seen in fig. 4, the maximum opening height of the first valve core 172 is h1, a first valve cover 184 is further connected to the second valve cover 184, the first valve cover 184 is connected to the second valve seat 181, the second valve cover 182 is disposed at the opening height of the second valve core 185, and the second cover 185 is seen in fig. 4, the second cover 185 is disposed above the second valve cover 185, and the second cover 185 is seen in the second cover 185.
Preferably, the plunger channel 11 and the valve installation channel 12 are vertically arranged, the upper end of the valve installation channel 12 is provided with an upper plug head 101 which is propped against a valve cover 19 of the auxiliary liquid discharge valve 18, and the lower end of the valve installation channel 12 is used for feeding liquid; one end of the plunger channel 11 is connected with a front plug 102 and a front flange plate 103, the other end of the plunger channel 11 is connected with a sealing box 30 arranged outside the pump body 1, and the plunger rod 14 is arranged through the sealing box 30.
A step for embedding the front plug 102 is arranged on one side of the pump body 1 where the front plug 102 and the front flange plate 103 are installed, so that the front plug 102 can be conveniently installed.
Preferably, the hydraulic end is a double-acting structure, the number of the pump bodies 1 is two, the structure of the pump body 1 can refer to fig. 3 (or refer to fig. 1), and the pump body comprises a front pump body 10 and a rear pump body 20, valve installation channels 12 of the front pump body 10 and the rear pump body 20 are arranged in parallel, plunger channels 11 of the front pump body 10 and the rear pump body 20 are arranged coaxially, the front pump body 10 and the rear pump body 20 are connected through a hollow cylindrical cylinder sleeve base body 50, the inside of the cylinder sleeve base body 50 is communicated with the plunger channels 11 of the front pump body 10 and the rear pump body 20 to form a main channel of reciprocating motion of a plunger rod 14, a cylinder sleeve 60 is arranged on the inner wall of the cylinder sleeve base body 50, a cylinder sleeve pressing sleeve 70 for pressing one end of the cylinder sleeve 60 against is arranged in the plunger channel 11 of the front pump body 10, a concave recess for pressing the other end of the cylinder sleeve 60 against is arranged on the outer end surface of the rear pump body 20, a piston body 13 reciprocates along the length section of the cylinder sleeve 60 under the action of the plunger rod 14, and an annular acting cavity is formed between the cylinder sleeve 60 and the plunger rod 14.
Preferably, one end of the plunger rod 14 connected to the piston body 13 is provided with a compression nut 104 and a lock nut 105 for fastening the piston body 13. The other end of the plunger rod 14 is tightly matched with the middle rod of the power end through a centering ball 106, a clamping ring 107 and a connecting nut 108, the plunger rod 14 is provided with an abrasion-resistant coating on an effective friction surface, a double-channel main and auxiliary packing and a guide sleeve are arranged in the sealing box body 30 to serve as a friction ring of the plunger rod 14, a sealing assembly of the plunger rod 14 is formed, and an annular area formed between the diameter of the piston body 13 and the diameter of the plunger rod 14 serves as a double-acting return acting body.
Wherein, set up between the two-pass main and auxiliary packing in the sealed letter body 30 and wash inner ring 301, the upper excircle department of sealed letter body 30 advances the flush liquid, discharges the flush liquid in the lower excircle department of sealed letter body 30, ensures that the hard impurity between the ground paste is washed away, does not cause the granule wearing and tearing between plunger rod 14 and the seal assembly.
Preferably, the cylinder liner pressing sleeve 70 has a cylindrical structure with a circular cross section, and a plurality of through holes 701 are formed in the side wall thereof, so that the conveyance of the medium in the front pump body 10 is not affected.
The cylinder sleeve seat 50, the front pump body 10 and the rear pump body 20 are welded into a whole or are precisely cast, and the side surfaces of the front pump body 10 and the rear pump body 20, which are connected with the cylinder sleeve seat 50, are provided with steps for embedding the end of the cylinder sleeve seat 50.
Preferably, the lower ends of the valve installation channels 12 of the front pump body 10 and the rear pump body 20 are connected with the combined water collecting manifold 80, a pressure stabilizing cavity 90 is formed in the space between the front pump body 10 and the rear pump body 20 and located outside the cylinder sleeve base body 50, the side wall of the pressure stabilizing cavity 90 is connected with the liquid inlet manifold 40, and the bottom of the pressure stabilizing cavity 90 is communicated with the combined water collecting manifold 80.
Preferably, the liquid outlet ends of the auxiliary drain valves 18 of the front pump body 10 and the rear pump body 20 are connected with the same combined drain manifold.
The upper side and the lower side of the cylinder sleeve seat body 50 are both provided with shaping plates which are assembled and welded with the front pump body 10 and the rear pump body 20 into a whole to form a pressure stabilizing cavity 90, and the lower side, namely the lower part of the pressure stabilizing cavity 90 is provided with a flange connected with the liquid inlet manifold 40. The bottom of the pressure stabilizing cavity 90 is connected with a combined water collecting manifold 80, the combined water collecting manifold 80 is simultaneously connected with the liquid inlet ends of the valve mounting channels 12 of the front pump body 10 and the rear pump body 20, and finally the front pump body 10, the rear pump body 20, the pressure stabilizing cavity 90 and the combined water collecting manifold 80 form an integrated structure with stronger integrity.
The working principle of the invention is as follows: when the piston rod moves forward, the main liquid discharge valve 17 and the auxiliary liquid discharge valve 18 of the rear pump body 20 are closed, the auxiliary liquid inlet valve 15 and the main liquid inlet valve 16 of the rear pump body 20 are opened to suck in media, the annular acting cavity between the cylinder sleeve 60 and the piston rod 14 is gradually filled with the media, meanwhile, the auxiliary liquid inlet valve 15 and the main liquid inlet valve 16 of the front pump body 10 are closed, the main liquid discharge valve 17 and the auxiliary liquid discharge valve 18 of the front pump body 10 are opened, and under the action of the piston body 13, the media in the cylinder sleeve 60 on the front side of the piston body 13 are discharged outwards through the main liquid discharge valve 17 and the auxiliary liquid discharge valve 18 of the front pump body 10 and finally discharged from the combined liquid discharge manifold.
When the piston rod moves backwards, the main liquid discharge valve 17 and the auxiliary liquid discharge valve 18 of the front pump body 10 are closed, the auxiliary liquid inlet valve 15 and the main liquid inlet valve 16 of the front pump body 10 are opened to suck in media, the cylinder sleeve 60 on the front side of the piston body 13 is gradually filled with the media, meanwhile, the auxiliary liquid inlet valve 15 and the main liquid inlet valve 16 of the rear pump body 20 are closed, the main liquid discharge valve 17 and the auxiliary liquid discharge valve 18 of the rear pump body 20 are opened, under the action of the piston body 13, the media in the annular acting cavity between the cylinder sleeve 60 and the plunger rod 14 are discharged outwards through the main liquid discharge valve 17 and the auxiliary liquid discharge valve 18 of the rear pump body 20 and finally discharged from the combined liquid discharge pipe to finish the action of double-acting medium conveying of a reciprocating pump.
Example 2: in this embodiment, the hydraulic end is a single-acting structure, the number of the pump bodies 1 is one, the structure of the pump body 1 can refer to fig. 6, the valve installation channel 12 is arranged at the tail end of the plunger channel 11, the lower end of the valve installation channel 12 is connected with the liquid inlet manifold 40, and the liquid outlet manifold is connected to the upper end of the valve installation channel 12, that is, the liquid outlet end of the auxiliary liquid outlet valve 18 is located.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned examples, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered as within the scope of the present invention.
Claims (9)
1. The utility model provides a bivalve structure fluid end, includes the pump body (1), inside crisscross plunger passageway (11) and the valve installation passageway (12) of being provided with of the pump body (1), be equipped with piston body (13) in plunger passageway (11), piston body (13) are connected with plunger rod (14), its characterized in that: the valve installation channel (12) penetrates through the pump body (1) along a straight line, a main liquid inlet valve (16) and an auxiliary liquid inlet valve (15) are arranged on one side, located at the staggered position of the plunger channel (11) and the valve installation channel (12), in the valve installation channel (12), and a main liquid discharge valve (17) and an auxiliary liquid discharge valve (18) are arranged on the other side, located at the staggered position of the plunger channel (11) and the valve installation channel (12), in the valve installation channel (12); the valve installation channel (12) is internally provided with an auxiliary liquid inlet valve (15), a main liquid inlet valve (16), a main liquid discharge valve (17) and an auxiliary liquid discharge valve (18) from bottom to top, the bottom of the main liquid inlet valve (16) is provided with a limiting column for limiting the opening height of the valve core of the auxiliary liquid inlet valve (15), and the bottom of the auxiliary liquid discharge valve (18) is provided with a limiting column for limiting the opening height of the valve core of the main liquid discharge valve (17).
2. The dual-valve structure fluid end of claim 1, wherein: the valve seats of the four valves, namely the auxiliary liquid inlet valve (15), the main liquid inlet valve (16), the main liquid discharge valve (17) and the auxiliary liquid discharge valve (18), comprise a section of outer conical surface, the inner wall of the valve installation channel (12) is provided with an inner conical surface matched with the outer conical surface, the inner wall of the valve installation channel (12) is connected with the valve seats of the four valves in a positioning mode through the inner conical surface and the outer conical surface, and the four valves are all on the same central line.
3. A double-valve structured fluid end as claimed in claim 2, wherein: the minimum diameter of the outer conical surface on the valve seat of the auxiliary liquid discharge valve (18) is larger than the maximum diameter of the outer conical surface on the valve seat of the main liquid discharge valve (17); the minimum diameter of the outer conical surface on the valve seat of the main liquid inlet valve (16) is larger than the maximum diameter of the outer conical surface on the valve seat of the auxiliary liquid inlet valve (15).
4. A double-valve structured fluid end as claimed in claim 3, wherein: the minimum diameter of the outer conical surface on the valve seat of the main liquid discharge valve (17) is larger than the maximum diameter of the outer conical surface on the valve seat of the main liquid inlet valve (16).
5. The dual-valve structure fluid end of claim 1, wherein: and valve covers (19) are connected above the auxiliary liquid discharge valve (18) and the main liquid inlet valve (16), and limiting columns for limiting the opening heights of the valve cores of the auxiliary liquid discharge valve (18) and the main liquid inlet valve (16) are arranged in the valve covers (19).
6. The double-valve structured fluid tip of claim 4, wherein: the plunger piston channel (11) and the valve installation channel (12) are vertically arranged, an upper plug head (101) which is propped against a valve cover (19) of the auxiliary liquid discharge valve (18) is arranged at the upper end of the valve installation channel (12), and the lower end of the valve installation channel (12) is used for liquid inlet; one end of the plunger channel (11) is connected with a front plug head (102) and a front flange plate (103), the other end of the plunger channel (11) is connected with a sealing box body (30) arranged outside the pump body (1), and the plunger rod (14) penetrates through the sealing box body (30) to be arranged.
7. The dual-valve structure fluid end of claim 6, wherein: the hydraulic end is single-acting structure, and the quantity of the pump body (1) is one, valve installation passageway (12) set up the end at plunger passageway (11), and the lower extreme of valve installation passageway (12) is connected with feed liquor manifold (40).
8. The dual-valve structure fluid end of claim 6, wherein: the hydraulic end is a double-acting structure, the number of the pump bodies (1) is two, the hydraulic end comprises a front pump body (10) and a rear pump body (20), valve installation channels (12) of the front pump body (10) and the rear pump body (20) are arranged in parallel, plunger channels (11) of the front pump body (10) and the rear pump body (20) are arranged coaxially, the front pump body (10) and the rear pump body (20) are connected through a hollow cylindrical cylinder sleeve base body (50), the plunger channels (11) which are communicated with the front pump body (10) and the rear pump body (20) inside the cylinder sleeve base body (50) form a main channel for reciprocating motion of a plunger rod (14), a cylinder sleeve (60) is arranged on the inner wall of the cylinder sleeve base body (50), a cylinder sleeve pressing sleeve (70) which supports one end of the cylinder sleeve (60) is arranged in the plunger channel (11) of the front pump body (10), a cylinder sleeve pressing sleeve (70) which supports one end of the cylinder sleeve (60) is arranged on the outer end face of the rear pump body (20) is arranged on the outer end face of the piston body (13), and an annular piston body (13) which supports the other end of the cylinder sleeve (60) along the length section where the cylinder sleeve (60) does work, and an annular cavity is formed between the plunger rod (14).
9. The dual-valve structure fluid end of claim 8, wherein: the lower ends of valve installation channels (12) of the front pump body (10) and the rear pump body (20) are connected with a combined water collecting manifold (80), a pressure stabilizing cavity (90) is formed in a space between the front pump body (10) and the rear pump body (20) and located outside a cylinder sleeve base body (50), a liquid inlet manifold (40) is connected to the side wall of the pressure stabilizing cavity (90), and the bottom of the pressure stabilizing cavity (90) is communicated with the combined water collecting manifold (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211276553.0A CN115573896A (en) | 2022-10-19 | 2022-10-19 | Double-valve structure hydraulic end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211276553.0A CN115573896A (en) | 2022-10-19 | 2022-10-19 | Double-valve structure hydraulic end |
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|---|---|
| CN115573896A true CN115573896A (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211276553.0A Pending CN115573896A (en) | 2022-10-19 | 2022-10-19 | Double-valve structure hydraulic end |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116557252A (en) * | 2023-04-18 | 2023-08-08 | 江苏大学镇江流体工程装备技术研究院 | Double-flow-passage reciprocating pump |
| 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 |
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| 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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