CN111734598A

CN111734598A - Emulsion plunger pump

Info

Publication number: CN111734598A
Application number: CN202010718058.5A
Authority: CN
Inventors: 王初亮; 韦文术; 李然; 刘昊; 叶健; 吴梦雨; 郭新伟; 刘波; 王剑强; 陈荣明; 王大龙; 陈敬斌; 赵康康; 于远征; 张健恺; 高娜; 张晶晶
Original assignee: Beijing Tiandi Marco Electro Hydraulic Control System Co Ltd; Beijing Meike Tianma Automation Technology Co Ltd
Current assignee: Beijing Tiandi Marco Electro Hydraulic Control System Co Ltd; Beijing Meike Tianma Automation Technology Co Ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2020-10-02
Also published as: WO2022016910A1; AU2021312669A1

Abstract

The invention discloses an emulsion plunger pump, which comprises: a pump head assembly, the pump head assembly comprising: a pump head body and a pipette valve assembly, a drain valve assembly and a spacer sleeve within the pump head body that isolates the pipette valve assembly from the drain valve assembly; the pump head body comprises a liquid suction valve seat mounting part for mounting the liquid suction valve assembly, a spacer mounting part for mounting the spacer and a liquid discharge valve seat mounting part for mounting the liquid discharge valve assembly; flowing back disk seat installation department with pass through the ladder face transition between the spacer installation department, the spacer installation department with pass through the ladder face transition between the imbibition disk seat installation department, just the aperture of flowing back disk seat installation department is greater than the aperture of spacer installation department, the aperture of spacer installation department is greater than the aperture of imbibition disk seat installation department. The invention solves the problem that the assembly and disassembly of the existing emulsion plunger pump are time-consuming and labor-consuming due to unreasonable structure.

Description

Emulsion plunger pump

Technical Field

The invention relates to an emulsion pump, in particular to an emulsion plunger pump.

Background

The emulsion plunger pump station is essential important equipment of a fully mechanized coal mining face, provides hydraulic power for a hydraulic support of the face, and is a heart of a hydraulic system of the whole face. In recent years, along with the increasing of large mining height working faces in China, in order to meet the requirements of high supporting resistance and high working resistance of a large mining height hydraulic support and the requirements of rapid frame moving and safety supporting, higher requirements are put forward on the reliability of an emulsion plunger pump station.

At present, an emulsion plunger pump generally adopts a five-plunger structure or a seven-plunger structure of a large-flow emulsion plunger pump, has the advantages of high transmission efficiency, stable support, small axial component force of a gear pair, compact structure and the like, and is widely applied.

In the prior art, a liquid suction valve core assembly and a liquid discharge valve assembly in a pump head body of a plunger type pump are respectively assembled from the upper side and the lower side of the pump head body, so when a liquid suction valve seat, a liquid suction valve core, a liquid discharge valve seat and a liquid discharge valve core are replaced, parts such as a liquid suction pipeline, a liquid suction box and the like need to be removed, the operability is poor, the maintenance time is long, and the maintenance cost is high; in addition, in the existing emulsion plunger pump, a return spring mounting seat of the liquid suction valve core is usually designed at the lower part of the liquid discharge valve core, so that on one hand, the mass of the liquid discharge valve core is increased, the inertia force is large, on the other hand, high-pressure liquid flow impacts the liquid suction valve core and the liquid discharge valve core, the stress on one side is large, the guide part is eccentrically worn when the valve core is lifted or dropped, and further, the sealing ring surface is eccentrically worn, and the service life is influenced.

Disclosure of Invention

The invention aims to solve the technical problems that the existing emulsion plunger pump is time-consuming and labor-consuming to assemble and disassemble and the valve core is eccentric due to unreasonable structure.

In order to solve the technical problems, the invention provides the following technical scheme:

an emulsion plunger pump, comprising: the crankcase assembly is used for being connected with the main driving motor to transmit power; a pump head assembly for pumping an emulsion; and a hydraulic conversion assembly connected between the crankcase assembly and the pump head assembly, the hydraulic conversion assembly being configured to convert mechanical power from the crankcase into hydraulic changes in the pump head assembly; the pump head assembly includes: a pump head body and a pipette valve assembly, a drain valve assembly and a spacer sleeve within the pump head body that isolates the pipette valve assembly from the drain valve assembly; the pump head body comprises a liquid suction valve seat mounting part for mounting the liquid suction valve assembly, a spacer mounting part for mounting the spacer and a liquid discharge valve seat mounting part for mounting the liquid discharge valve assembly; the aperture of flowing back disk seat installation department is greater than the aperture of spacer installation department, the aperture of spacer installation department is greater than the aperture of imbibition disk seat installation department.

In some embodiments of the present invention, the pipette valve assembly comprises: the liquid suction valve seat is provided with a first matching surface; the liquid suction valve core is connected to the liquid suction valve seat in a sliding mode, and a second matching surface matched with the first matching surface is arranged on the liquid suction valve core; the first matching surface and the second matching surface are formed into conical surfaces.

In some embodiments of the present invention, the liquid suction valve assembly further includes a return spring mounting seat located on a lower side of the liquid suction valve seat, and the return spring mounting seat is sleeved on the valve core; and the first return spring is positioned between the liquid suction valve seat and the return spring mounting seat.

In some embodiments of the invention, the pipette seat comprises: the outer wall of the outer sleeve is connected with the liquid suction valve seat mounting part in a sealing mode, and the end part of the inner wall of the outer sleeve is provided with the first matching surface; the inner sleeve body is connected with the outer sleeve body through a transition arm; the inner wall of the inner sleeve body is connected with the liquid suction valve core in a sliding mode.

In some embodiments of the invention, the suction valve cartridge comprises: the valve core head is provided with the second matching surface; and the valve core rod is connected in the inner sleeve of the liquid suction valve seat in a sliding manner.

In some embodiments of the present invention, the drain valve assembly comprises: the liquid discharge valve seat is provided with a third matching surface; the liquid drainage valve core is connected to the liquid drainage valve seat in a sliding mode, and a fourth matching surface matched with the third matching surface is arranged on the liquid drainage valve core; the third matching surface and the fourth matching surface are formed into conical surfaces; the liquid drainage valve core stop valve piece is positioned between a liquid drainage cavity blocking cover for blocking an opening on the upper side of the pump head body and the liquid drainage valve seat, a sealing groove is formed on the outer peripheral surface of the liquid drainage valve core stop valve piece, and the liquid drainage valve core stop valve piece and the pump head body are in radial sealing connection through a sealing ring arranged in the sealing groove; and one end of the second reset spring is sleeved on the liquid discharge valve core, and the other end of the second reset spring is abutted against the liquid discharge valve core stop valve member.

In some embodiments of the present invention, the pump head body is formed with a first through hole and a second through hole which are coaxial along a radial direction in a region of the spacer mounting portion, and the first through hole is used for communicating with the hydraulic conversion assembly; and an anti-rotation part for preventing the spacer bush from rotating and a plugging part for fixing the anti-rotation part are arranged in the second through hole.

In some embodiments of the present invention, the hydraulic conversion assembly comprises: the packing seat assembly is positioned on the outer side of the first through hole of the pump head body; and the plunger is connected in the packing seat assembly in a sliding manner, one end of the plunger is connected with the crankcase assembly, and the other end of the plunger extends into the first through hole.

In some embodiments of the invention, the crankcase assembly comprises: the crankshaft box body, at least one stage of gear pair and a crank block mechanism are positioned in the crankshaft box body; the input gear of the gear pair is used for being connected with the output shaft of the main driving motor; the crankshaft of the crank-slider mechanism is connected to an output gear of the gear pair, and a slider of the crank-slider mechanism extends out of the crankcase body and is used for being connected with the plunger; the sliding block is sleeved with a sealing box assembly for sealing the crankcase; the distance between the outer end face of the sealing box assembly and the outer end face of the packing seat assembly is larger than the distance between the outer end face of the packing seat assembly and the end face of the pump head body.

In some embodiments of the invention, the seal cartridge assembly comprises: the sealing box mounting plate comprises a connecting plate part connected with the end face of the crankcase body and a sealing sleeve barrel part inserted between the sliding block and the opening of the crankcase body; the connecting plate part is connected with the crankcase through a bolt embedded in the plate surface of the connecting plate part; the sealing sleeve is connected with the crankcase in a sealing way through a sealing ring; an oil seal and an oil seal compression ring; the oil seal and the oil seal pressing ring are located in the sealing sleeve barrel portion, and the oil seal pressing ring is in threaded connection with the sealing sleeve barrel portion.

Compared with the prior art, the technical scheme of the invention has the following technical effects:

in the emulsion plunger pump disclosed by the invention, the aperture of the liquid drainage valve seat mounting part is larger than that of the spacer bush mounting part, and the aperture of the spacer bush mounting part is larger than that of the liquid suction valve seat mounting part; therefore, the liquid suction valve core assembly, the spacer bush and the liquid discharge valve assembly can be installed through one side of the pump head body, compared with the prior art, the liquid suction valve core assembly is convenient to assemble and disassemble, and the consumed time is short; meanwhile, the liquid suction valve component and the liquid discharge valve component are isolated through the spacer bush, the liquid suction valve component and the liquid discharge valve component are independently arranged in structure, liquid flow can be prevented from impacting a liquid suction valve core and a liquid discharge valve core in the liquid suction and discharge process, the problem of unilateral stress does not exist, the guide part cannot be eccentrically worn in the opening or closing process of the valve core, the sealing ring surface cannot be eccentrically worn, and the service life is longer.

Drawings

The objects and advantages of the present invention will be understood by the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view of one embodiment of an emulsion plunger pump provided in the present invention;

FIG. 2 is a cross-sectional view of one embodiment of an emulsion plunger pump provided in the present invention;

FIG. 3 is a cross-sectional view of one embodiment of a pump head assembly of the emulsion plunger pump provided in the present invention;

FIG. 4 is a cross-sectional view of one embodiment of a pump head body of an emulsion plunger pump according to the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a suction valve seat in the emulsion plunger pump according to the present invention;

FIG. 6 is a schematic structural diagram of an embodiment of a liquid suction valve core in the emulsion plunger pump according to the present invention;

FIG. 7 is a schematic structural diagram of an embodiment of a drain valve seat in the emulsion plunger pump according to the present invention;

FIG. 8 is a schematic structural diagram of an embodiment of a drain spool in an emulsion plunger pump according to the present invention;

FIG. 9 is a schematic view of an embodiment of a drain valve core check valve member in the emulsion plunger pump according to the present invention;

FIG. 10 is a schematic view of an embodiment of a seal box mounting plate in the emulsion plunger pump according to the present invention;

fig. 11 is a schematic view of an embodiment of a seal box assembly in the emulsion plunger pump according to the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Fig. 1 and fig. 2 show a specific embodiment of an emulsion plunger pump disclosed by the present invention, and the emulsion plunger pump of the present embodiment is a five-plunger emulsion plunger pump. The emulsion plunger pump comprises three parts; the first part is a crankcase assembly 300 for connecting with a main driving motor to transmit power; the second part is a pump head assembly 100 for pumping the emulsion; the third part is a hydraulic conversion assembly 200 for converting mechanical power of the crankcase into hydraulic power of the pump head assembly 100, wherein one end of the hydraulic conversion assembly 200 is connected to the crankcase assembly 300, and the other end is connected to the pump head assembly 100.

The structure and the connection relationship of the above three parts are described below.

< Pump head Assembly 100>

As shown in fig. 3, the pump head assembly 100 includes a pump head body 101 and an pipette cartridge 108 located on the underside of the pump head body 101; wherein, the liquid suction box 108 is detachably connected with the pump head body 101 through bolts. A suction valve assembly 102, a discharge valve assembly 103, and a spacer 104 for separating the suction valve assembly 102 from the discharge valve assembly 103 are provided inside the pump head body 101. Because keep apart through spacer 104 between imbibition valve unit spare 102 and the flowing back valve unit spare 103 in this application, imbibition valve unit spare 102 and flowing back valve unit spare 103 structure independent setting, it can be at imbibition flowing back especially high pressure flowing back in-process, avoid the liquid stream to imbibition case, flowing back case to produce the impact, do not have unilateral atress problem, the case opens or closes in-process guide part and can not take place the eccentric wear, and then the sealed torus also can not produce the eccentric wear, and the life-span is longer.

The pump head body 101 is a cavity structure with an upper opening and a lower opening, and the lower opening 1011 of the pump head body 101 is communicated with the liquid suction box 108. The cavity includes: a liquid suction valve seat mounting part 1012 for mounting the liquid suction valve assembly 102, a spacer mounting part 1013 for mounting the spacer 104, and a liquid discharge valve seat mounting part 1014 for mounting the liquid discharge valve assembly 103.

In order to facilitate the installation of each component, as shown in fig. 4, the liquid discharge valve seat installation part 1014 and the spacer installation part 1013 are transited by a step surface, the spacer installation part 1013 and the liquid suction valve seat installation part 1012 are transited by a step surface, the aperture B of the liquid discharge valve seat installation part 1014 is larger than the aperture C of the spacer installation part 1013, and the aperture C of the spacer installation part 1013 is larger than the aperture D of the liquid suction valve seat installation part 1012. Thus, when the pipette valve assembly 102, the discharge valve assembly 103, and the spacer 104 are mounted, the pipette valve assembly 102 can easily enter the pipette seat mounting part 1012 through the discharge chamber covering hole 1017, the discharge seat mounting part 1014, and the spacer mounting part 1013 on the upper side of the pump body 101 in this order; the spacer 104 enters the spacer installation part 1013 after passing through the liquid discharge cavity blocking hole 1017 and the liquid discharge valve seat installation part 1014 in sequence, and then the liquid discharge valve assembly 103 is installed, so that the liquid suction valve assembly 102, the liquid discharge valve assembly 103 and the spacer 104 can be assembled and disassembled through the upper side opening of the cavity.

Because the liquid suction valve assembly 102, the liquid discharge valve assembly 103 and the spacer 104 are all installed through one side, when parts in the pump head need to be maintained, the parts can be detached only by opening the upper end of the pump head body 101; meanwhile, the liquid suction valve assembly 102, the liquid discharge valve assembly 103 and the spacer 104 are installed through one side, the axial matching relation of all parts is easy to guarantee, and the problem of mutual interference caused by poor position matching when the liquid suction valve assembly, the liquid discharge valve assembly 103 and the spacer are installed through two sides is avoided.

The composition and structure of the pipette valve assembly 102, the drain valve assembly 103, and the spacer 104 of the pump head assembly 100 are described below.

< pipette valve Assembly 102>

As shown in fig. 3, the suction valve assembly 102 includes a suction valve seat 1021, a suction valve core 1022, a return spring mount 1023 located on the underside of the suction valve seat 1021, and a first return spring 1024.

The suction valve core 1022 slides up and down along the suction valve seat 1021 under the action of hydraulic force, and the first return spring 1024 is used for providing downward elastic force for the suction valve core 1022 and sealing the opening of the suction valve seat 1021. Reset spring mount 1023 install in imbibition valve seat 1021 downside, compare among the prior art the design of flowing back case lower extreme and be used for the spring mount pad that imbibition case 1022 resets, do not receive the influence of flowing back case action when imbibition case 1022 resets, imbibition case closes the valve reliably, strikes littleer, the life-span is longer.

Specifically, the reset spring mounting seat 1023 is sleeved on the liquid suction valve core 1022, the two can be fixed in a threaded connection or interference fit mode, and the reset spring mounting seat 1023 is mounted on the liquid suction valve core 1022 to enable the liquid suction valve assembly 102 to be completely independent of the liquid discharge valve assembly 103, so that the assembly and the disassembly are convenient.

Specifically, the liquid suction valve seat 1021 and the pump head body 102 are in clearance fit, and are in sealing connection through a sealing ring so as to facilitate the assembly of the liquid suction valve seat 1021. Specifically, the sealing connection mode of imbibition valve seat 1021 with imbibition valve seat 1021 installation department 1012 is not only, as preferred, be equipped with the seal groove on the lateral surface of imbibition valve seat 1021, be equipped with O type sealing washer and two sealing ring in the seal groove, two sealing ring is located respectively the upper and lower both sides of O type sealing washer. Because the liquid pressure of the emulsion plunger pump is higher, sealing check rings made of polyformaldehyde are designed on two sides of the O-shaped sealing ring so as to prevent the O-shaped sealing ring from being damaged under the action of high-pressure emulsion.

Specifically, as shown in fig. 5, the suction valve seat 1021 includes: an outer sleeve 1021-1, an inner sleeve 1021-2, and a transition arm 1021-3 connecting the inner sleeve 1021-2 and the outer sleeve 1021-1.

The outer wall of the outer sleeve 1021-1 is connected with the liquid suction valve seat 1021 mounting part 1012 in a sealing manner, and the end part of the inner wall of the outer sleeve 1021-1 is provided with a first matching surface 1021-4 for matching with the liquid suction valve core 1022; the inner wall of the inner sleeve 1021-2 is slidably connected with the liquid suction valve core 1022.

As shown in fig. 6, the suction valve core 1022 includes: a valve core head 1022-1 and a valve core rod 1022-2, the valve core head 1022-1 is configured to mate with the outer housing 1021-1 of the liquid suction valve seat 1021, and the valve core rod 1022-2 is slidably connected to the inner housing 1021-2 of the liquid suction valve seat 1021.

The liquid suction valve seat 1021 adopts a structure of an inner sleeve body and an outer sleeve body, the liquid suction valve core 1022 adopts a structure of a valve core head 1022-1 and a valve core rod 1022-2, so that the liquid suction valve core 1022 can reliably slide along the inner sleeve body of the liquid suction valve seat 1021, and the liquid suction valve core in the prior art is prevented from radially shaking relative to the liquid suction valve seat.

The valve core head 1022-1 is provided with a second matching surface 1022-3 matched with the first matching surface 1021-4, wherein the first matching surface 1021-4 and the second matching surface 1022-3 are formed into a conical surface; the liquid suction valve core 1022 and the liquid suction valve seat 1021 are matched through conical surfaces, so that the sealing performance between the liquid suction valve core and the liquid suction valve seat 1021 is better, meanwhile, the compensation can be automatically realized after the liquid suction valve core and the liquid suction valve seat are abraded, and the service life is prolonged.

< liquid discharge valve Assembly 103>

As shown in fig. 3, the drain valve assembly 103 includes a drain valve seat 1031, a drain valve core 1032 slidably connected to the drain valve seat 1031, a drain valve core stop valve 1033 located above the drain valve seat 1031, and a second return spring 1034. The drain valve core 1032 hydraulically slides up and down along the drain valve seat 1031, and the second return spring 1034 is used for providing downward elastic force to the drain valve core 1032 and sealing the opening of the liquid suction valve seat 1021. The liquid discharge valve core stop valve 1033 plays a role in installing the second reset spring 1034 and simultaneously plays a role in blocking a liquid discharge cavity, and the liquid discharge valve core stop valve 1033 adopts axial sealing and performs axial limiting while sealing.

In order to ensure the reliable connection between the liquid discharge valve element 1033 and the pump head body 101, a liquid discharge cavity sealing cover 105 for sealing the upper opening of the cavity is disposed on the upper side of the pump head body 101. The structure of the liquid discharge blocking cover 105 is not exclusive, and in one embodiment, the liquid discharge cavity blocking cover 105 is pressed against the liquid discharge valve core stop valve 1033 and is connected with the pump head body 101 through a screw; in another embodiment, as shown in fig. 3, a screw thread is provided on the outer circumferential surface of the liquid discharge chamber blocking cover 105, a screw hole is provided at the upper opening of the pump head body 101, and the liquid discharge chamber blocking cover 105 is screwed to the pump head body 101.

Specifically, as shown in fig. 7, the drain valve seat 1031 is provided with a third mating surface 1031-1, and as shown in fig. 8, the drain valve core 1032 is provided with a fourth mating surface 1031-2 which is mated with the third mating surface 1031-1; the third mating surface 1031-1 and the fourth mating surface 1031-2 are formed into conical surfaces; the drain valve core 1032 and the drain valve seat 1031 are matched through conical surfaces to enable the sealing performance between the drain valve core 1032 and the drain valve seat 1031 to be better, meanwhile, compensation can be automatically achieved after abrasion is carried out, and the service life is prolonged.

Specifically, as shown in fig. 3, the drain valve element 1033 is located between the drain chamber cover 105 for closing the upper opening of the chamber and the drain valve seat 1031. As shown in fig. 9, the drain valve spool stop valve 1033 includes a spring support 1033-1 at a lower side, a blocking 1033-2 at an upper side, and a connecting 1033-3 therebetween.

The spring support 1033-1 includes a support plate extending horizontally and a support arm extending downward along the support plate, the support arm abuts against the upper end surface of the drain valve seat 1031, and a protrusion or a circular snap ring for positioning the second return spring 1034 is formed on the support plate.

A sealing groove is formed in the outer peripheral surface of the blocking portion 1033-2, and the liquid discharge valve element stop valve 1033 and the pump head body 101 are in radial sealing connection through a sealing ring arranged in the sealing groove. Compared with the structure that the liquid discharge valve core stop valve piece adopts axial limiting and sealing in the prior art, the liquid discharge valve core stop valve piece 1033 adopts radial sealing in the embodiment, and the sealing of the pump head body cavity can be realized without the axial larger pressing force of the liquid discharge cavity blocking cover 105.

Specifically, a cylindrical protrusion is formed at the upper end of the liquid discharge valve element 1032, and one end of the second return spring 1034 is sleeved on the cylindrical protrusion.

< spacer 104>

As shown in fig. 3, the spacer 104 is formed as a cylindrical sleeve body, and the cylindrical sleeve body is formed with two through holes coaxially arranged along the radial direction.

As shown in fig. 3 and 4, the pump head body 101 is formed with a first through hole 1015 and a second through hole 1016 which are coaxial in the radial direction in the area of the spacer mounting part 1013, and the first through hole 1015 is used for communicating with the hydraulic conversion assembly; an anti-rotation part 107 for preventing the spacer 104 from rotating and a blocking part 106 for fixing the anti-rotation part 107 are arranged in the second through hole 1016.

< hydrodynamic converter Assembly 200>

As shown in fig. 1, the hydraulic conversion assembly 200 includes a packing set assembly 201 and a plunger 202 slidably coupled within the packing set assembly 201.

The packing seat assembly 201 is located outside the first through hole 1015 of the pump head body 101 and is fixedly connected to the crankcase body 301; one end of the plunger 202 is connected to the crankcase assembly 300, and the other end is inserted into the first through hole 1015.

< crankcase Assembly 300>

As shown in fig. 1, the crankcase assembly 300 includes: a crankcase body 301, and at least one stage of gear pair and a crank block mechanism which are positioned in the crankcase body 301; an input gear shaft (not shown in the figure) of the gear pair is used for being connected with an output shaft of the main driving motor; the crankshaft 302 of the slider-crank mechanism is connected to an output gear (not shown) of the gear pair, and the slider 303 of the slider-crank mechanism extends out of the crankcase 301 and is connected to the plunger 202.

As shown in fig. 2, a seal box assembly for sealing the crankcase 301 is sleeved on the sliding block 303; and the distance a between the outer end face of the sealing box assembly and the outer end face of the packing seat assembly is greater than the distance b between the outer end face of the packing seat assembly and the end face of the pump head body.

Thus, after the plunger 202 is removed from the pump body 101 side, the packing assembly can be removed from the space between the end surface of the crankshaft and the end surface of the pump body without removing the pump body and the accessories.

Specifically, the seal box assembly includes a seal box mounting plate 305, an oil seal 306, and an oil seal compression ring 307; wherein the seal box mounting plate 305 includes: a connecting plate portion 305-1 connected to an end surface of the crankcase 301, and a seal sleeve portion 305-2 inserted between the slider 303 and an opening of the crankcase 301; wherein the web portion 305-1 is connected to the crankcase 301 by bolts embedded in the surface of the web portion 305-1; the sealing sleeve 305-2 is connected with the crankcase body 301 in a sealing mode through a sealing ring; the oil seal 306 and the oil seal pressing ring 307 are positioned in the sealing sleeve barrel part 305-2, and the oil seal pressing ring 307 is in threaded connection with the sealing sleeve barrel part 305-2.

As can be seen, in the above embodiment of the present invention, the oil seal pressing ring 307 is embedded inside the seal box mounting plate 305, and the connecting bolt of the seal box mounting plate 305 and the crankcase 301 is selectively embedded in the plate surface of the seal box mounting plate 305, so that the axial dimension of the entire seal box mounting plate assembly is small. The packing seat assembly is easy to disassemble and assemble.

< working Process of emulsion plunger Pump >

When the emulsion plunger pump works and operates, after the rotary motion input by the main driving motor drives the input gear shaft and the output gear on the crankshaft 302 to do primary speed reduction motion, simultaneously, the crankshaft 302 drives the connecting rod to rotate and convert the rotation into the reciprocating linear motion of the sliding block 303 and the plunger 202, so that the volume of the containing cavity in the pump head assembly 100 is changed, when the sliding block 303 is at the farthest end, the plunger 202 causes the volume of the containing cavity to be increased to form negative pressure, the liquid suction valve core 1022 is opened, the liquid discharge valve core 1032 is closed, and liquid suction is finished in the process; when the slider 303 moves to the nearest end, the plunger 202 causes the volume of the cavity to decrease, thereby compressing the sucked liquid to form high-pressure liquid, the liquid suction valve core 1022 is closed, the liquid discharge valve core 1032 is opened, the high-pressure liquid is discharged, and the liquid discharge process is completed, wherein the two processes are completed by the interaction and the dynamic of the five groups of plungers 202.

< mounting and demounting step of emulsion plunger Pump >

The assembly of the emulsion plunger pump can be realized according to the following steps.

Step 1: the pipette valve assembly 102 was assembled into 5 sets for use, and before assembly, the pipette valve seat 1021 and the pipette valve core 1022 were ground and subjected to a sealing test.

Step 2: 2O-shaped ring check rings and 1O-shaped ring are sleeved in a sealing ring groove of the drainage valve seat 1031, the assembling method is that one O-shaped ring check ring is respectively installed on each side of the O-shaped ring, 5 groups of drainage valve assemblies 103 are assembled, and lubricating grease is coated on the surface of the O-shaped ring for later use after the assembly is completed.

And step 3: and (3) sleeving the combined sealing ring into a sealing ring groove of the anti-rotating part 107, assembling 5 groups of the components, and smearing lubricating grease on the surface of the sealing ring of the component for later use after the assembly is finished.

And 4, step 4: and (3) sleeving the combined sealing ring in a sealing ring groove of the drainage valve core stop valve 1033, assembling 5 groups of the components, and smearing lubricating grease on the surface of the sealing ring of the component for later use after the assembly is completed.

And 5: and assembling the packing seat assembly for 5 groups for later use, and smearing lubricating grease on the surface of an inner hole of the assembly after the assembly is completed.

Step 6: and assembling the seal box assembly for 5 groups for later use, and smearing lubricating grease on the surface of an inner hole of the assembly after the assembly is completed.

And 7: and (3) putting the imbibition valve component 102 finished in the step (1) into the imbibition valve component 102 of the imbibition valve installation part through the pump head body liquid discharge cavity blocking hole 1017, and lightly knocking by using a copper bar to enable the imbibition valve component to be tightly attached to the pump head body 101.

And 8: the spacer 104 is placed on the imbibition valve assembly 102 installed in the step 7 through the pump head body liquid discharge cavity blocking hole 1017, the anti-rotation piece 107 and the blocking piece 106 are installed at the second through hole 1016, the anti-rotation piece 107 is inserted into the small hole of the spacer 104, circumferential positioning is conducted on the spacer 104, and then the blocking piece 106 is used for compressing.

And step 9: and (3) assembling the drainage valve seat 1031 finished in the step (2) to the upper end of the spacer 104 through the assembly body finished in the step (8), and lightly knocking the assembly body by using a copper bar to ensure that the assembly body is attached to the spacer 104.

Step 10: and assembling the drainage valve core 1032 and the second return spring 1034 from the pump head body drainage cavity cover hole 1017 into the finished assembly in the step 9.

Step 11: assembling the drainage valve core stop valve 1033 completed in the step 4 into the assembled body completed in the step 10, lightly knocking the drainage valve core stop valve 1033 by a copper bar to make the same attached to the drainage valve seat 1031, and then pressing the same by the drainage cavity blocking cover 105.

Step 12: the pipette tip 108 is screwed onto the pump head body 101 completed in step 11 to form the pump head assembly 100.

Step 13: the seal box assembly is assembled to the power end crankcase assembly 300.

Step 14: the packing seat assembly 201 is mounted to the power end crankcase assembly 300 and is initially attached with screws without tightening.

Step 15: the plunger 202 is inserted into the packing seat assembly 201 initially assembled in step 14 and the connecting bolts of the ceramic plunger 202 are tightened.

Step 16: the pump head assembly 100 completed in step 12 is assembled to the power end assembly completed in step 15 and the attachment screws are tightened.

And step 17, tightening the screws which are not tightened in the step 14. And finishing the installation.

When the suction and drainage valve assembly needs to be disassembled, the following steps are adopted:

step 1, removing the liquid discharge cavity blocking cover 105;

step 2, sequentially disassembling the drain valve assembly 103 from the side of a drain cavity blocking hole 1017;

and step 3: the plugging piece 106 and the anti-rotation piece 107 are sequentially disassembled;

and 4, step 4: detaching the plunger 202 from the slider 303 side along the first through hole 1015 and the second through hole 1016;

and 5: then the spacer bush 104 and the liquid suction valve assembly 102 are disassembled from the side of the liquid discharge cavity blocking hole 1017;

so far, the dismantlement of each valves of pump head body inboard has been accomplished promptly, and in this scheme, need not dismantle the dismouting that the pump head body can be accomplished to imbibition box 108, convenient maintenance.

When the packing seat assembly 201 needs to be disassembled, the following steps are adopted:

step 1: the plugging piece 106 and the anti-rotation piece 107 are sequentially disassembled;

step 2: detaching the plunger 202 from the slider 303 side along the first through hole 1015 and the second through hole 1016;

and step 3: the crankcase is driven to make the end face of the sliding block 303 contract to the end face of the seal box assembly, and the packing seat assembly can be detached along a gap between the outer end face of the seal box assembly and the outer end face of the packing seat assembly.

Therefore, the packing seat assembly can be completed under the condition that the suction and discharge valve in the pump head body 101 is not disassembled, and the structure greatly reduces the maintenance difficulty of the emulsion plunger pump.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. An emulsion plunger pump, comprising:

the crankcase assembly is used for being connected with the main driving motor to transmit power;

a pump head assembly for pumping an emulsion;

and a hydraulic conversion assembly connected between the crankcase assembly and the pump head assembly, the hydraulic conversion assembly being configured to convert mechanical power from the crankcase into hydraulic changes in the pump head assembly; the method is characterized in that: the pump head assembly includes:

a pump head body and a pipette valve assembly, a drain valve assembly and a spacer sleeve within the pump head body that isolates the pipette valve assembly from the drain valve assembly;

the pump head body comprises a liquid suction valve seat mounting part for mounting the liquid suction valve assembly, a spacer mounting part for mounting the spacer and a liquid discharge valve seat mounting part for mounting the liquid discharge valve assembly;

the aperture of flowing back disk seat installation department is greater than the aperture of spacer installation department, the aperture of spacer installation department is greater than the aperture of imbibition disk seat installation department.

2. The emulsion plunger pump of claim 1, wherein:

the pipette valve assembly comprises:

the liquid suction valve seat is provided with a first matching surface;

the liquid suction valve core is connected to the liquid suction valve seat in a sliding mode, and a second matching surface matched with the first matching surface is arranged on the liquid suction valve core; the first matching surface and the second matching surface are formed into conical surfaces.

3. The emulsion plunger pump of claim 2, wherein:

the liquid suction valve component also comprises a return spring mounting seat positioned on the lower side of the liquid suction valve seat, and the return spring mounting seat is sleeved on the valve core;

and the first return spring is positioned between the liquid suction valve seat and the return spring mounting seat.

4. The emulsion plunger pump of claim 2, wherein:

the pipette seat comprises:

the outer wall of the outer sleeve is connected with the liquid suction valve seat mounting part in a sealing mode, and the end part of the inner wall of the outer sleeve is provided with the first matching surface;

the inner sleeve body is connected with the outer sleeve body through a transition arm; the inner wall of the inner sleeve body is connected with the liquid suction valve core in a sliding mode.

5. The emulsion plunger pump of claim 4, wherein:

the imbibition valve core includes:

the valve core head is provided with the second matching surface;

and the valve core rod is connected in the inner sleeve of the liquid suction valve seat in a sliding manner.

6. The emulsion plunger pump of claim 1, wherein:

the drain valve assembly includes:

the liquid discharge valve seat is provided with a third matching surface;

the liquid drainage valve core is connected to the liquid drainage valve seat in a sliding mode, and a fourth matching surface matched with the third matching surface is arranged on the liquid drainage valve core; the third matching surface and the fourth matching surface are formed into conical surfaces;

the liquid drainage valve core stop valve piece is positioned between a liquid drainage cavity blocking cover for blocking an opening on the upper side of the cavity of the pump head body and the liquid drainage valve seat, a sealing groove is formed on the outer peripheral surface of the liquid drainage valve core stop valve piece, and the liquid drainage valve core stop valve piece and the pump head body are in radial sealing connection through a sealing ring arranged in the sealing groove;

and one end of the second reset spring is sleeved on the liquid discharge valve core, and the other end of the second reset spring is abutted against the liquid discharge valve core stop valve member.

7. The emulsion plunger pump of claim 1, wherein:

the pump head body is provided with a first through hole and a second through hole which are coaxial along the radial direction in the area of the spacer mounting part, and the first through hole is used for being communicated with the hydraulic conversion assembly; and an anti-rotation part for preventing the spacer bush from rotating and a plugging part for fixing the anti-rotation part are arranged in the second through hole.

8. The emulsion plunger pump of claim 7, wherein:

the hydraulic conversion assembly includes:

the packing seat assembly is positioned on the outer side of the first through hole of the pump head body;

and the plunger is connected in the packing seat assembly in a sliding manner, one end of the plunger is connected with the crankcase assembly, and the other end of the plunger extends into the first through hole.

9. The emulsion plunger pump of claim 8, wherein:

the crankcase assembly includes:

the crankshaft box body, at least one stage of gear pair and a crank block mechanism are positioned in the crankshaft box body;

the input gear of the gear pair is used for being connected with the output shaft of the main driving motor; the crankshaft of the crank-slider mechanism is connected to an output gear of the gear pair, and a slider of the crank-slider mechanism extends out of the crankcase body and is used for being connected with the plunger;

the sliding block is sleeved with a sealing box assembly for sealing the crankcase; the distance between the outer end face of the sealing box assembly and the outer end face of the packing seat assembly is larger than the distance between the outer end face of the packing seat assembly and the end face of the pump head body.

10. The emulsion plunger pump of claim 9, wherein:

the seal cartridge assembly includes:

the sealing box mounting plate comprises a connecting plate part connected with the end face of the crankcase body and a sealing sleeve barrel part inserted between the sliding block and the opening of the crankcase body; the connecting plate part is connected with the crankcase through a bolt embedded in the plate surface of the connecting plate part; the sealing sleeve is connected with the crankcase in a sealing way through a sealing ring;

an oil seal and an oil seal compression ring; the oil seal and the oil seal pressing ring are located in the sealing sleeve barrel portion, and the oil seal pressing ring is in threaded connection with the sealing sleeve barrel portion.