CN212479491U - Plunger pump and pump station - Google Patents

Abstract

The utility model discloses a plunger pump, including the pump head assembly, it includes: the pump head body is internally provided with a cavity; the liquid suction valve assembly and the liquid discharge valve assembly are positioned in the cavity, and the liquid suction valve assembly and the liquid discharge valve assembly are isolated by a spacer bush; wherein, the cavity includes: the liquid absorption valve assembly comprises a liquid absorption valve seat mounting part for mounting the liquid absorption valve assembly, a spacer mounting part for mounting a spacer, a liquid absorption valve seat mounting part for mounting the liquid absorption valve assembly and a liquid absorption cavity positioned on the lower side of the liquid absorption valve seat mounting part, wherein the liquid absorption cavity is communicated with an emulsion supply device through a pipeline; the liquid drainage valve seat installation part and the spacer bush installation part are in transition through a step surface, the aperture of the liquid drainage valve seat installation part is larger than that of the spacer bush installation part, and the aperture of the spacer bush installation part is larger than or equal to that of the liquid suction valve seat installation part. The utility model discloses disclose the pump station of adopting above-mentioned plunger pump simultaneously, the utility model provides a current plunger pump structure unreasonable problem that leads to the dismouting difficulty.

Description

Plunger pump and pump station

Technical Field

The utility model relates to a be used for the emulsion pump station, especially relate to a five plunger emulsion pumps and pump station.

Background

The emulsion pump station is essential important equipment of the coal mine fully-mechanized coal mining face, provides hydraulic power for a hydraulic support of the working face, and is a heart of a hydraulic system of the whole working 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 pump station.

At present, an emulsion pump usually adopts a five-plunger structure or a seven-plunger structure of a large-flow emulsion 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 two sides 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 water 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 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, so that the service life is influenced; the pump head body and the imbibition box of the existing plunger pump are two independent part structures, when the two are installed, a longer installation hole needs to be formed on the imbibition box, the two are assembled and disassembled through a longer screw rod, and the manufacturing and assembling cost is higher.

In addition, the current technical means for monitoring the pump station mainly comprises monitoring of gear oil in a crankcase (oil temperature monitoring, oil pressure monitoring and oil level monitoring), hydraulic pressure monitoring of a hydraulic end and motor temperature monitoring, and partial patents also relate to vibration and oil quality monitoring of mechanical equipment. However, due to the factors such as installation space limitation and signal transmission influence, the sensor is generally installed outside the pump station, and the monitoring of built-in precise core components such as a liquid suction and discharge valve core at the hydraulic end of the pump station is not available at present.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that current plunger pump structure unreasonable its pump head dismouting problem that wastes time and energy that leads to.

To the technical problem mentioned above, the utility model provides a following technical scheme:

a plunger pump comprises a crankcase assembly, a main driving motor and a plunger, wherein 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 having a cavity therein; a pipette valve assembly, a drain valve assembly and a spacer sleeve within the chamber isolating the pipette valve assembly from the drain valve assembly; wherein the cavity comprises: the liquid suction valve seat mounting part is used for mounting the liquid suction valve assembly, the spacer bush mounting part is used for mounting the spacer bush, the liquid discharge valve seat mounting part is used for mounting the liquid discharge valve assembly, and the liquid suction cavity is positioned on the lower side of the liquid suction valve seat mounting part and is communicated with an emulsion supply device through a pipeline; the flowing back disk seat installation department with pass through the ladder face between the spacer 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 or equal to the aperture of imbibition disk seat installation department.

In some embodiments of the present application, the pipette valve assembly includes: 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 application, 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 application, the outer wall of the outer sleeve is connected with the liquid suction valve seat mounting portion in a sealing manner, and the end portion 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 present application, 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 this application, imbibition valve seat bottom is equipped with the pressure sensor installation department that is used for installing pressure sensor, pressure sensor is used for detecting impact force when imbibition valve core removes.

In some embodiments of the present application, 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 is arranged between the liquid drainage valve seat and the upper end face of the pump head body; 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 application, the upper side of the pump head body is provided with a liquid discharge cavity blocking cover for blocking the opening at the upper side of the cavity, and the liquid discharge cavity blocking cover is pressed against the liquid discharge valve element stop valve member and is connected with the pump head body through a screw.

In some embodiments of the present application, through holes that are vertically communicated with each other are formed on the blocking cover of the liquid discharge cavity and the stop valve member of the liquid discharge valve core, and a threaded hole is formed on the liquid discharge valve core; the liquid discharge cavity sealing cover is provided with a magnetostrictive sensor, and a telescopic rod of the magnetostrictive sensor is fixedly connected with the liquid discharge valve core.

In some embodiments of the present application, the pump head body is formed with a first through hole and a second through hole, which are coaxial, in 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 this application, the shutoff piece middle part is equipped with the through-hole, prevent being equipped with the mounting hole that is used for installing vibration sensor on the rotating member, vibration sensor is used for detecting the vibration of pump head body.

In some embodiments of the present application, the hydraulic conversion assembly includes: the hydraulic conversion shell is fixedly connected to the outer side of the first through hole of the pump head body; and the plunger is connected in the hydraulic conversion shell in a sliding manner, one end of the plunger is connected with the crankcase assembly, and the other end of the plunger is inserted into the first through hole.

In some embodiments of the present application, 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 slider-crank mechanism is connected to an output gear of the gear pair, a slider of the slider-crank mechanism is used for being connected with the plunger, a mounting hole is formed in the end of the slider, and a reinforcing sleeve is embedded in the mounting hole; the plunger is in threaded connection with the reinforcing sleeve; and a protection sheet is arranged between the sliding block and the end face of the plunger, and the protection sheet is extruded between the sliding block and the plunger.

The utility model discloses disclose a pump station at the same time, it includes, the base and plunger pump, main driving motor located on base; wherein, main driving motor is used for the drive the utility model discloses foretell plunger pump.

In some embodiments of the above pump station, the crankcase assembly further comprises a lubrication system, wherein the lubrication system is used for lubricating components in the crankcase assembly; the lubrication system includes: the lubricating oil supply device comprises a lubricating oil pump, a lubricating oil pump driving motor and a lubricating oil tank; a cooling device, the cooling device comprising: an inlet of the cooling tank is communicated with the lubricating oil pump, and an outlet of the cooling tank is communicated with each lubricating point of the crankcase assembly; and the emulsion pipeline is positioned in the cooling box and communicated with the pump head assembly, and the emulsion pipeline is used for cooling the lubricating oil in the cooling box.

The technical scheme of the utility model prior art relatively has following technological effect:

in the plunger pump disclosed by the utility model, in the cavity inside the pump head body, the liquid drainage valve seat installation part and the spacer bush installation part are transited through the step surface, the aperture of the liquid drainage valve seat installation part is larger than that of the spacer bush installation part, and the aperture of the spacer bush installation part is larger than or equal to that of the liquid drainage valve seat installation 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, in the application, the liquid suction cavity is directly formed inside the pump head body, the liquid suction box does not need to be additionally processed and assembled, only a thin blocking plate needs to be added to block the lower end opening, the manufacturing cost is low, and the assembly is simple and convenient.

Further, the utility model discloses an among the plunger pump, integrated installation pressure sensor, magnetostrictive transducer and vibration sensor in the plunger pump finally realize providing brand-new monitoring scheme, analytic means to impact force, displacement stroke, the vibration monitoring of pump station for pump station operation conditions.

Further, the utility model discloses an in the pump station, adopt the cooling method of external plunger pump of arranging, it can choose the lubricating-oil pump driving motor that power is littleer for use, solves the current big, the low problem of cooling efficiency of cooler fluid flow resistance that sets up in the imbibition box, and the implementation cost is low, and the motor overall dimension is little more does benefit to the installation maintenance in narrow and small space.

Drawings

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

fig. 1 is a cross-sectional view of one embodiment of a plunger pump provided by the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the plunger pump provided by the present invention;

fig. 3 is a cross-sectional view of an embodiment of a pump head assembly of a plunger pump provided by the present invention;

fig. 4 is a partial schematic view of a connection relationship between a plunger and a slider portion in the plunger pump according to the present invention;

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

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

fig. 7 is a schematic structural diagram of an embodiment of a liquid discharge valve seat in a plunger pump according to the present invention;

fig. 8 is a schematic structural diagram of a specific embodiment of a liquid discharge valve element in a plunger pump according to the present invention;

fig. 9 is a schematic view of an embodiment of a liquid discharge valve spool check valve member in the plunger pump according to the present invention;

fig. 10 is a schematic structural diagram of a specific embodiment of the pump station provided by the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can 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 a plunger pump disclosed in the present invention, and the plunger pump of the present embodiment is a five-plunger emulsion pump. The plunger pump A comprises three major 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, a liquid suction valve assembly 102, a liquid discharge valve assembly 103, a spacer 104 for separating the liquid suction valve assembly 102 from the liquid discharge valve assembly 103, a liquid suction chamber blocking plate 112 for blocking the opening on the lower side of the pump head body 101, and a liquid discharge chamber blocking cover 105 for blocking the opening on the upper side of the pump head body 101.

Wherein, pump head body 101 is upper and lower open-ended cavity structures, 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, a liquid discharge valve seat mounting part 1014 for mounting the liquid discharge valve assembly 103, and a liquid suction chamber 1011 located at the lower side of the liquid suction valve assembly 102, the liquid suction chamber 1011 being communicated with an emulsion supply device (not shown in the figure) through a pipeline.

In order to facilitate the installation of each component, the liquid discharge valve seat installation part 1014 and the spacer installation part 1013 are transited by a step surface, the aperture of the liquid discharge valve seat installation part 1014 is larger than that of the spacer installation part 1013, and the aperture of the spacer installation part 1013 is larger than or equal to that of the liquid suction valve seat installation part 1012. Thus, when the pipette valve assembly 102, the drain valve assembly 103, and the spacer 104 are mounted, the pipette valve assembly 102 can easily enter the pipette seat mounting portion 1012 through the drain seat mounting portion 1014 and the spacer mounting portion 1013; the spacer 104 enters the spacer installation part 1013 after passing through the liquid discharge valve seat installation part 1014, and then the liquid discharge valve assembly 103 is installed, thereby realizing 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.

Meanwhile, the liquid suction cavity is directly formed inside the pump head body 101, so that the problems that the liquid suction part and the pump head body 101 are connected in a detachable mode to cause high manufacturing cost and time and labor consuming assembly can be avoided.

In addition, because the liquid suction valve assembly 102 and the liquid discharge valve assembly 103 are isolated by the spacer bush 104 in the application, the liquid suction valve assembly 102 and the liquid discharge valve assembly 103 are structurally and independently arranged, the liquid suction valve assembly can avoid liquid flow from impacting a liquid suction valve core and a liquid discharge valve core in the liquid suction and discharge process, particularly in the high-pressure liquid 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, further, the sealing ring surface cannot be eccentrically worn, and the service life is longer.

Specifically, the liquid suction cavity 1011 is formed into a spherical cavity structure, and the diameter of the spherical cavity is larger than that of other parts of the cavity, so that enough emulsion enters the cavity on the upper side of the liquid suction valve core during liquid suction.

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 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.

In order to detect the impact force of the suction valve core 1022, as shown in fig. 3, a pressure sensor 107 is mounted at the bottom of the suction valve seat 1021, and the pressure sensor 107 is used for detecting the impact force acting on the suction valve seat 1021 when the suction valve core 1022 moves. The pressure sensor 107 monitors the impact force of the suction and discharge valve core action at each time in real time, and can also calculate the impact frequency according to the impact force change curve, when the impact force and the frequency are greatly deviated from the normal state, the group of suction and discharge valve cores can be judged to have faults, and an alarm is given to remind an operator to disassemble and investigate. The signal line of pressure sensor 107 is connected to wireless transmitter through wired mode, and wireless transmitter is embedded at the pump body surface, and wireless transmitter transmits the pressure value to the controller through wireless signal.

< 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 opening on the upper side of the cavity is disposed on the upper side of the pump head body 101, and the liquid discharge cavity sealing cover 105 is pressed against the liquid discharge valve element 1033 and is connected to the pump head body 101 through a screw.

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 spool stop valve 1033 is disposed between the drain valve seat 1031 and the upper end surface of the pump head body 101. 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.

The outer wall surface of the blocking part 1033-2 is provided with a step surface, the cylindrical surface of the blocking part 1033-2 positioned on the lower side of the step surface is connected with the inner wall of the pump head body 101 in a sealing manner, and the cylindrical surface of the blocking part 1033-2 positioned on the upper side of the step surface is pressed against the upper end surface of the pump head body 101. The stepped surface structure of the blocking part 1033-2 can avoid the problem that the sealing performance of the cavity is not easy to guarantee due to the fact that a gap is easily formed between the upper end surface of the pump head body 101 between the liquid discharge valve core stop valve element 1033 and the liquid discharge cavity blocking cover 105 in the structure without the stepped surface. On the other hand, the blocking part 1033-2 without a step surface cannot realize axial positioning, and when the axial dimension of the drain valve spool stop valve 1033 is smaller than the distance between the end surface of the pump head body 101 and the upper surface of the drain valve seat 1031, the drain valve spool stop valve 1033 is shifted up and down; the stepped surface of the blocking part 1033-2 is used for axial positioning, so that the position of the drainage valve core stop valve 1033 relative to the pump head body 101 is fixed, and the machining precision of the drainage valve core stop valve 1033 is reduced.

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.

In order to detect the linear displacement of the liquid discharge valve core 1032, as shown in fig. 3, through holes which are communicated with each other up and down are formed on the liquid discharge cavity blocking cover 105 and the liquid discharge valve core stop valve 1033, and a threaded hole is formed on the liquid discharge valve core 1032; the liquid discharge cavity blocking cover 105 is provided with a magnetostrictive sensor 108, a telescopic rod of the magnetostrictive sensor 108 is in threaded connection with a transition connecting rod, and the lower end of the transition connecting rod is in threaded connection with a threaded hole of the liquid discharge valve core 1032. Thus, the telescopic rod of the magnetostrictive sensor 108 is fixedly connected with the liquid discharge valve core 1032, the magnetostrictive sensor 108 can calculate the action frequency according to the displacement stroke change curve of the liquid discharge valve core 1032, when the displacement stroke and the frequency are greatly deviated from the normal state, the group of liquid suction and discharge valve cores 1032 can be judged to have faults, and an alarm is given to remind an operator to disassemble and investigate.

< 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, 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 region 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 113 for preventing the spacer 104 from rotating and a blocking part 106 for fixing the anti-rotation part 113 are arranged in the second through hole 1016.

In order to detect the vibration signal of the pump head body 101, a vibration sensor 109 is further disposed on the pump head body 101. Specifically, as shown in fig. 3, a through hole is formed in the middle of the blocking piece 106, a threaded mounting hole is formed in the rotation-preventing piece 113, and the vibration sensor 109 is screwed to the threaded mounting hole of the rotation-preventing piece 113. The vibration sensor 109 detects the vibration signal of the pump head body 101 in real time when the liquid suction and discharge valve core 1032 acts each time, calculates an acceleration frequency spectrum curve according to the vibration signal, and can judge that the group of liquid suction and discharge valve cores 1032 has a fault when the vibration frequency spectrum is greatly deviated from a normal state, and alarm to remind an operator to disassemble and investigate.

The utility model discloses an among the above-mentioned embodiment, adopt pressure sensor 107, magnetostrictive transducer 108 and vibration sensor 109 integrated mode at the pump head assembly, finally realize impact force, displacement stroke, the vibration monitoring to the pump station, provide brand-new monitoring scheme, analytic means for pump station operation conditions.

< Hydraulic conversion Assembly 200>

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

The hydraulic conversion housing 201 is fixedly connected to the outer side of the first through hole 1015 of the pump head body 101; 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.

A middle box 203 is further disposed outside the hydraulic conversion assembly 200, the crankcase assembly 300 is coupled to the pump head assembly 100 through the middle box 203, and a portion of the plunger 202 connected to the crankcase assembly 300 is located inside the middle box 203 to avoid the portion being exposed outside.

< 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 302 of the gear pair is used for being connected with an output shaft of the main driving motor; the crankshaft 304 of the slider-crank mechanism is connected to the output gear 303 of the gear pair, and the slider 305 of the slider-crank mechanism is used for connecting with the plunger 202.

< connection of crankcase Assembly 300 to Hydraulic conversion Assembly 200>

As shown in fig. 4, the end of the sliding block 305 of the crankcase assembly 300 is provided with a mounting hole, and a reinforcing sleeve 306 is embedded in the mounting hole; the plunger 202 is threaded onto the reinforcing sleeve 306. Because the plunger 202 is usually made of ceramic materials, and the sliding block 305 is made of stainless steel materials, the faults that the threads of the plunger 202 are disengaged and broken due to the fact that the plunger 202 and the sliding block 305 are directly connected with the plunger 202 through the threads are solved by arranging the reinforcing sleeve 306 at the connecting end of the sliding block 305 and the plunger 202, the connecting strength of the plunger 202 and the sliding block 305 is improved, and replacement and maintenance of the plunger 202 are facilitated. Specifically, the reinforcing sleeve is a steel screw sleeve, and threads are arranged inside and outside the reinforcing sleeve respectively.

Because the plunger 202 is usually made of ceramic material, and the sliding block 305 is made of stainless steel material, the problem of damage easily occurs when the two are in direct contact, a protection sheet 400 is arranged between the sliding block 305 and the end surface of the plunger 202, the protection sheet 400 is made of rubber and other materials which are softer than the ceramic material and the stainless steel material, and the protection sheet 400 is extruded between the two materials to prevent the plunger 202 from being damaged and damaging the sliding block 305.

< working Process of plunger Pump A >

When the plunger pump a operates, the rotational motion input by the main driving motor drives the input gear shaft 302 and the output gear 303 on the crankshaft 304 to perform a first-stage deceleration motion, and at the same time, the crankshaft 304 drives the connecting rod to rotate and convert the rotation into the reciprocating linear motion of the slider 305 and the plunger 202, so that the volume of the cavity in the pump head assembly 100 changes, when the slider 305 is at the farthest end, the plunger 202 causes the volume of the cavity to increase to form negative pressure, the liquid suction valve core 1022 is opened, the liquid discharge valve core 1032 is closed, and liquid suction is completed in the process; when the slide block 305 moves to the nearest end, the plunger 202 causes the volume of the containing cavity to be reduced so as to compress the sucked liquid to form high-pressure liquid, the liquid suction valve core 1022 is closed, the liquid discharge valve core 1032 is opened to discharge the high-pressure liquid, the liquid discharge is completed in the process, the control of the high-pressure liquid pressure is realized through the unloading valve 110 and the safety valve 111 which are arranged on the two sides of the pump head, the two processes are the interactive and dynamic completion of five groups of plungers 202, wherein the liquid cannot leak due to good sealing performance in a hydraulic conversion system, the conical surface sealing of the liquid suction valve core 1022 and the liquid suction valve seat 1021 and the conical surface sealing of the liquid discharge valve core 1032 and the liquid discharge valve seat 1031 in the pump head assembly 100 jointly guarantee the high volumetric efficiency of the five-plunger pump A, the flow rate of the discharged liquid can reach more than 1200L/min.

< step of attaching and detaching plunger Pump A >

The utility model provides an assembly step of pump head assembly of emulsion plunger pump as follows:

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 113, 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 (3) putting the liquid suction valve assembly 102 finished in the step (1) into the liquid suction valve assembly 102 through an opening at the upper side of the pump head body 101, and lightly knocking the liquid suction valve assembly with a copper bar to enable the liquid suction valve assembly to be tightly attached to the pump head body 101.

Step 6: placing the spacer 104 on the liquid suction valve assembly 102 installed in the step 5 through the upper opening of the pump head body 101, installing the anti-rotation piece 113 and the blocking piece 106 at the second through hole 1016, inserting the anti-rotation piece 113 into the small hole of the spacer 104, positioning the spacer 104 in the circumferential direction, and then compressing the spacer 106 by using the blocking piece 106.

And 7: 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 (6), and lightly knocking the assembly body by using a copper bar to ensure that the assembly body is attached to the spacer 104.

And 8: the drain spool 1032, second return spring 1034 are assembled into the step 7 completed assembly.

And step 9: and (3) assembling the drainage valve core stop valve 1033 completed in the step (4) into the assembled body completed in the step (8), lightly knocking the drainage valve core stop valve 1033 by a copper bar to enable the drainage valve core stop valve 1033 to be attached to a drainage valve seat 1031, and then tightly pressing the drainage valve core stop valve with a drainage cavity blocking cover 105 to complete the installation of the pump head assembly 100.

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, the liquid discharge assembly 103 is sequentially detached from the upper side of the pump head body 101;

and step 3: the plugging member 106 and the rotation preventing member 113 are sequentially disassembled;

and 4, step 4: detaching the plunger 202 from the slider 305 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 sequentially detached from the upper side of the pump head body 101;

so far, the dismantlement of each valves of pump head body 101 inboard has been accomplished promptly, and in this scheme, the dismouting of each spare part can be accomplished from one side of pump head body 101, convenient maintenance.

Fig. 10 shows a concrete embodiment of a five-plunger emulsion pump station provided by the present invention, which includes a base, a plunger pump a and a main driving motor 2, wherein the plunger pump a and the main driving motor are located on the base; the main driving motor 2 is configured to drive the plunger pump a, and the plunger pump a is the plunger pump a according to the above specific embodiment, which is not described herein again.

The emulsion pump station further comprises a lubricating system for lubricating components in the crankcase assembly 300 of the plunger pump a, such as a crankshaft, gears, connecting rods, bearings, sliders and the like, and the lubricating system comprises a lubricating oil supply device and a cooling device in order to sufficiently cool the lubricating oil during operation.

The lubricating oil supply device comprises a lubricating oil pump 5, a lubricating oil pump driving motor 4 and a lubricating oil tank (not shown in the figure);

the cooling device includes:

an inlet of the cooling tank 3 is communicated with the lubricating oil pump 5, and an outlet of the cooling tank 3 is communicated with each lubricating point of parts such as a crankshaft, a gear, a connecting rod, a bearing, a sliding block and the like in the crankcase assembly 300;

and an emulsion pipeline (not shown in the figure) positioned in the cooling tank 3, the emulsion pipeline is communicated with the pump head assembly 100, and the emulsion pipeline is used for cooling the lubricating oil in the cooling tank 3.

The utility model discloses a pump station adopts the external cooling mode of arranging plunger pump A in, and it can choose for use the lubricating-oil pump driving motor 4 that power is littleer to solve the current cooler fluid flow resistance that sets up in the imbibition box big, the low problem of cooling efficiency, the implementation cost is low, and the motor overall dimension is little more does benefit to the installation maintenance in narrow and small space.

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 can be made without departing from the scope of the invention.

Claims (15)

1. A plunger pump, which comprises a plunger body,

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; characterized in that, the pump head assembly includes:

a pump head body having a cavity therein;

a pipette valve assembly, a drain valve assembly and a spacer sleeve within the chamber isolating the pipette valve assembly from the drain valve assembly;

wherein the cavity comprises: the liquid suction valve seat mounting part is used for mounting the liquid suction valve assembly, the spacer bush mounting part is used for mounting the spacer bush, the liquid discharge valve seat mounting part is used for mounting the liquid discharge valve assembly, and the liquid suction cavity is positioned on the lower side of the liquid suction valve seat mounting part and is communicated with an emulsion supply device through a pipeline;

the flowing back disk seat installation department with pass through the ladder face between the spacer 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 or equal to the aperture of imbibition disk seat installation department.

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

the bottom of the liquid suction valve seat is provided with a pressure sensor mounting part for mounting a pressure sensor, and the pressure sensor is used for detecting the impact force generated when the liquid suction valve core moves.

7. The 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 is arranged between the liquid drainage valve seat and the upper end face of the pump head body;

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.

8. The plunger pump of claim 7, wherein:

and a liquid discharge cavity blocking cover used for blocking the opening at the upper side of the cavity is arranged at the upper side of the pump head body, and the liquid discharge cavity blocking cover is pressed against the liquid discharge valve core stop valve member and is connected with the pump head body through a screw.

9. The plunger pump of claim 8, wherein:

the liquid discharge cavity blocking cover and the liquid discharge valve core check valve piece are provided with through holes which are communicated up and down, and the liquid discharge valve core is provided with a threaded hole; the liquid discharge cavity sealing cover is provided with a magnetostrictive sensor, and a telescopic rod of the magnetostrictive sensor is fixedly connected with the liquid discharge valve core.

10. The 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.

11. The plunger pump of claim 10, wherein:

the anti-rotation device is characterized in that a through hole is formed in the middle of the plugging piece, a mounting hole for mounting a vibration sensor is formed in the anti-rotation piece, and the vibration sensor is used for detecting vibration of the pump head body.

12. The plunger pump of claim 10, wherein:

the hydraulic conversion assembly includes:

the hydraulic conversion shell is fixedly connected to the outer side of the first through hole of the pump head body;

and the plunger is connected in the hydraulic conversion shell in a sliding manner, one end of the plunger is connected with the crankcase assembly, and the other end of the plunger is inserted into the first through hole.

13. The plunger pump of claim 12, 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 the output gear of the gear pair, the slider of the crank-slider mechanism is used for being connected with the plunger,

the end part of the sliding block is provided with a mounting hole, and a reinforcing sleeve is embedded in the mounting hole; the plunger is in threaded connection with the reinforcing sleeve; and a protection sheet is arranged between the sliding block and the end face of the plunger, and the protection sheet is extruded between the sliding block and the plunger.

14. A pump station, characterized in that: which comprises the steps of preparing a mixture of a plurality of raw materials,

the plunger pump and the main driving motor are positioned on the base;

wherein, the main driving motor is used for driving the plunger pump, and the plunger pump adopts the plunger pump of any one of claims 1-13.

15. The pump station according to claim 14, wherein: a lubrication system for lubricating components within the crankcase assembly; the lubrication system includes:

the lubricating oil supply device comprises a lubricating oil pump, a lubricating oil pump driving motor and a lubricating oil tank;

a cooling device, the cooling device comprising:

an inlet of the cooling tank is communicated with the lubricating oil pump, and an outlet of the cooling tank is communicated with each lubricating point of the crankcase assembly;

and the emulsion pipeline is positioned in the cooling box and communicated with the pump head assembly, and the emulsion pipeline is used for cooling the lubricating oil in the cooling box.

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