CN106050596B - Plunger metering pump - Google Patents
Plunger metering pump Download PDFInfo
- Publication number
- CN106050596B CN106050596B CN201610403738.1A CN201610403738A CN106050596B CN 106050596 B CN106050596 B CN 106050596B CN 201610403738 A CN201610403738 A CN 201610403738A CN 106050596 B CN106050596 B CN 106050596B
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- China
- Prior art keywords
- plunger
- hole
- control valve
- pump housing
- metering pump
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention provides a kind of plunger metering pump, including：The pump housing sets pumping cavity and the mounting hole, suction inlet and the outlet that are connected with pumping cavity on the pump housing；First control valve, the first control valve are mounted on suction inlet and sentence being turned on and off for control suction inlet；Second control valve, the second control valve are mounted on exit to control being turned on and off for outlet；Plunger, plunger are movably mounted in mounting hole and extend to pumping cavity；Wherein, the pump housing, the first control valve, the second control valve and plunger pass through cure process.It is high containing slurry of solids convenient for conveying since the pump housing, the first control valve, the second control valve and the plunger in the present invention are by cure process, abrasion of the slurry solids particle to plunger metering pump is reduced, improves the service life of plunger metering pump.
Description
Technical field
The present invention relates to pumping installations technical field, in particular to a kind of plunger metering pump.
Background technology
A kind of common conveying equipment for fluid substances of plunger metering pump, belongs to reciprocating pump.It is back and forth transported by plunger in cylinder body
It is dynamic, the volume of seal operation cavity volume is made to change to realize that fluid conveys.Plunger pump have rated pressure it is high, it is compact-sized,
The advantages that efficient and flow-rate adjustment facilitates is widely used in high pressure, the slurry that flow needs are adjusted and neat liquid transportation field
It closes, such as hydraulic press, engineering machinery, ship and chemical machinery etc..
In actual use, part occasion needs to convey containing the high suspension of solid concentration, and feed flow is less, conveying
Pressure is higher, and plunger metering pump use on the market is easily worn in above-mentioned occasion, seriously affects plunger metering pump
Service life.
The content of the invention
It is a primary object of the present invention to provide a kind of plunger metering pump, existed with solving plunger metering pump of the prior art
The problem of being easily damaged when pumping high-concentration turbid liquor.
To achieve these goals, the present invention provides a kind of plunger metering pump, including：The pump housing sets pumping on the pump housing
Cavity and mounting hole, suction inlet and the outlet connected with pumping cavity；First control valve, the first control valve are mounted on sucking
To control being turned on and off for suction inlet at mouthful；Second control valve, the second control valve are mounted on exit to control opening for outlet
It opens or closes；Plunger, plunger are movably mounted in mounting hole and extend to pumping cavity；Wherein, the pump housing, the first control
Valve, the second control valve and plunger pass through cure process.
Further, the surface contacted with slurry to be pumped of the pump housing, the first control valve, the second control valve and plunger
It is both provided with hard material layer.
Further, the first end of the pump housing is set fluted, and plunger metering pump further includes end-cap assembly, and end-cap assembly is set
In the first end of the pump housing to seal groove to form pumping cavity.
Further, the first control valve and the second control valve include：Valve body is provided with first through hole on valve body；First
Positioning body, the first positioning body are mounted in first through hole, set the first deflector hole and the first half spherical cavities on the first positioning body, and first
The both ends of deflector hole connect respectively with first through hole and the first half spherical cavities；Second positioning body, it is logical that the second positioning body is mounted on first
In hole, be provided with the second deflector hole and the second half spherical cavities on the second positioning body, the both ends of the second deflector hole respectively with first through hole
It is connected with the second half spherical cavities, the first half spherical cavities and the second half spherical cavities fasten to set and form spherical cavity；Valve ball, valve ball are mounted on spherical shape
Intracavitary.
Further, the second positioning body is located at the one side of the close pumping cavity of first through hole, and the second deflector hole includes：Column
Shape hole section, cylindricality hole section are connected with the second half spherical cavities；Taper hole section, the first end of taper hole section are connected with cylindricality hole section, taper
The second end of hole section be used for suction inlet or outlet, the cross section of taper hole section from close to cylindricality hole section to away from cylindrical hole
The direction of section becomes larger.
Further, the diameter of valve ball is 1.4 to 1.6 times of the aperture of cylindricality hole section.
Further, the first control valve and the second control valve further include more straight pins, and more straight pins are led along first
Discharge orifice extends to the direction of the second deflector hole, and is disposed around the periphery of valve ball.
Further, suction inlet and outlet is conical opening, the cross-sectional area of conical opening from away from pumping cavity to close
The direction of pumping cavity tapers into.
Further, it is provided with the first irrigation channel on the pump housing, the first irrigation channel is along the axially extending of the pump housing；First control
Valve processed further includes the 3rd deflector hole, and the both ends of the 3rd deflector hole connect respectively with spherical cavity and the first irrigation channel.
Further, the second irrigation channel is provided on the pump housing, the second irrigation channel is along the axially extending of the pump housing and with going out
Mouth connection.
Further, there is gap, the width in gap is more than the solid in slurry to be pumped between plunger and mounting hole
The diameter of particle.
Further, mounting hole has expansion segment, and expansion segment is located at the second end of the pump housing, and plunger metering pump further includes sealing
Filler assembly, airtight and watertight padding component are set on plunger.
Further, airtight and watertight padding component includes airtight and watertight padding and gland, and airtight and watertight padding is mounted in expansion segment, gland set
It is located on plunger airtight and watertight padding being limited in expansion segment.
Further, flushing hole is provided on the pump housing, flushing hole extends to plunger surface through airtight and watertight padding.
Further, suction inlet and the axis of outlet are each perpendicular to the axis of the pump housing, and mounting hole is connected with the bottom of groove
And extend along the axis of the pump housing, the axis of suction inlet and outlet is interlaced, and suction inlet is than exporting closer to mounting hole.
Further, one end for being located at pumping cavity of plunger is provided with overstriking section, and overstriking section is adapted to pumping cavity, and
The outer surface of overstriking section is provided with groove.
It applies the technical scheme of the present invention, when needing to pump slurry, the first control valve and the second control valve can be passed through
Effect control suction inlet and outlet opening and closing, and slurry is pumped into from suction inlet in pump chamber body by the reciprocating motion for passing through plunger
Portion or the outside that slurry is delivered to pumping cavity from outlet.Due to the pump housing, the first control valve, the second control valve in the present invention
And plunger is by cure process, and it is high containing slurry of solids convenient for conveying, slurry solids particle is reduced to plunger metering pump
Abrasion improves the service life of plunger metering pump.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 diagrammatically illustrates the partial sectional view of the plunger metering pump of the present invention；
Fig. 2 diagrammatically illustrates the partial enlarged view in M regions in Fig. 1；And
Fig. 3 diagrammatically illustrates the partial enlarged view of the n-quadrant in Fig. 1.
Wherein, above-mentioned attached drawing is marked including the following drawings：
10th, the pump housing；11st, cavity is pumped；12nd, mounting hole；121st, expansion segment；13rd, suction inlet；14th, export；20th, the first control
Valve processed；21st, valve body；22nd, the first positioning body；221st, the first half spherical cavities；23rd, the second positioning body；231st, the second half spherical cavities；24th, valve
Ball；25th, the second deflector hole；251st, cylindricality hole section；252nd, taper hole section；26th, straight pin；27th, the 3rd deflector hole；28th, first is logical
Hole；30th, the second control valve；40th, plunger；41st, overstriking section；42nd, groove；50th, end-cap assembly；51st, end cap；52nd, bolt；60th, it is close
Seal filler assembly；61st, airtight and watertight padding；62nd, gland；70th, the first irrigation channel；80th, the second irrigation channel；90th, flushing hole.
Specific embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to shown in Fig. 1 to Fig. 3, according to an embodiment of the invention, a kind of plunger metering pump is provided.
Plunger metering pump in the present embodiment includes：The pump housing 10, the first control valve 20, the second control valve 30, plunger 40, drive
Dynamic motor (not shown), transmission mechanism (not shown) and stroke control mechanism (not shown).
Pumping cavity 11 and the mounting hole 12 connected with the pumping cavity 11, suction inlet 13 on the pump housing 10 are set and gone out
Mouth 14；During installation, the first control valve 20 is mounted on suction inlet 13 and sentences being turned on and off for control suction inlet 13；By the second control
Valve 30 processed is mounted on outlet 14 and sentences being turned on and off for control outlet 14；Plunger 40 is movably mounted in mounting hole 12 simultaneously
It extends in pumping cavity 11；Wherein, the pump housing 10, the first control valve 20, the second control valve 30 and plunger 40 are through overcure
Processing.Transmission mechanism is connected between driving motor and plunger 40, and the rotation of driving motor is converted into plunger 40 in mounting hole
It is moved back and forth in 12, is easy to implement the pump function of plunger metering pump.
According to above-mentioned structure it is recognised that when needing to pump slurry, the first control valve 20 and the second control can be passed through
The effect control suction inlet 13 of valve 30 processed and the opening and closing of outlet 14, and pass through the reciprocating motion of plunger 40 by slurry from suction inlet 13
It is pumped into 11 inside of pumping cavity or slurry is delivered to the outside of pumping cavity 11 from outlet 14.
By the pump housing 10, the first control valve 20, the second control valve 30 and plunger 40 in this present embodiment through overcure
Processing, it is high containing slurry of solids convenient for conveying, abrasion of the slurry solids particle to plunger metering pump is reduced, improves plunger metering
The service life of pump.
In embodiments herein, in order to improve the service life of plunger metering pump, in the pump housing 10, the first control valve
20th, the surface contacted with slurry to be pumped of the second control valve 30 and plunger 40 is both provided with hard material layer, Jin Ershi
Row is to the cure process of the pump housing 10, the first control valve 20, the second control valve 30 and plunger 40.
Specifically, pulp flow can be supplied in the pump housing 10, the first control valve 20, the second control valve 30 and plunger 40
Internal face coating carbon steel layer, diamond layer etc..It can also be by the pump housing 10, the first control valve 20, the second control valve 30 and column
40 grades are filled in directly to be made using carbon steel material or diamond.It is of course also possible to use other are with material system with high hardness
It forms, as long as other modes of texturing under the thought of the application, within the protection domain of the application.
For the ease of processing, the first end setting of the pump housing 10 in the present embodiment is fluted, and correspondence is measured in plunger
The first of pump sets end-cap assembly 50, which is arranged on the first end of the pump housing 10 to seal groove to form pumping
Cavity 11.Compared with the mode to form a pumping cavity 11 is processed in the inside of the pump housing 10, the present embodiment passes through in the pump housing 10
First end processing groove, then end-cap assembly 50 by groove seal by way of be not only convenient for installing, be also convenient for processing.
Specifically, the end-cap assembly 50 in this implementation includes end cap 51, bolt 52 and gasket (not shown),
, can be by the port sealing of groove by the effect of end cap 51 and gasket, and then form the pumping cavity 11, Ran Houtong of sealing
Bolt 52 is crossed to fix end cap 51 and gasket.
In the present embodiment, the first control valve 20 and the second control valve 30 are check valve, are easy to implement plunger metering pump
Pump function.
In order to which the plunger metering pump for enabling the application conveys the higher slurry of solid content, High Pressure Difference, the slurry of small flow.It is logical
Previous high solids, the use experience of minimum flow plunger pump, such as the coal slurry feed pump of flow 1L/h are crossed, during use
It was found that being susceptible to solid particle in material in plunger metering pump transmission process is easily deposited on check valve, check valve is caused to block,
Feed flow is unstable or does not measure above.By inventor the study found that there are two this imagination main cause of appearance is possible, first, stream
There are dead zones, slurry in road slowly or not to flow very much in dead zone flow velocity, and solid is caused to deposit and gradually increase for a long time；Second is that by
It is bigger in slurry viscosity itself, cause medium in one layer of runner near wall there are the very slow region of flow velocity, in this section area
Solid in the slurry of domain slowly deposits, and wall surface is more coarse, and when viscosity is bigger, the thickness in this layer of region is bigger, and pipeline exists
It can accelerate to deposit again when dead zone and slower flow velocity, deposition can constantly increase in accumulation.
Find that general spherical shape check valve upper and lower rectangular area is relatively slow and with the area of whirlpool for flow velocity by flow field analysis
Domain, this is consistent with the easily deposition of one-way valve seat region in actual use.It is originally close with the deposition of solid particle in material
It seals the bad flow that design is not achieved and flow is unstable, reaching certain time accumulation causes valve ball that cannot effectively seal, and causes to pump
Not upper amount cannot convey material.Therefore the check valve of the plunger pump of the present invention, pump housing runner and hermetic unit carry out special
Design.
It is in order to remove the slow dead angle of the flowing velocity in check valve, check valve upper and lower flow velocity is slow and have the right angle of whirlpool
Region is cancelled, and check valve interior flow field is designed as approximate circle, deposition of the reduction slurry inside check valve.
Specifically, the first control valve 20 in the present embodiment and the second control valve 30 include the positioning of valve body 21, first
Body 22, the second positioning body 23 and valve ball 24.
Wherein, it is provided with first through hole 28 on valve body 21；First positioning body 22 is mounted in first through hole 28, the first positioning
First deflector hole (not shown) and the first half spherical cavities 221 are set on body 22, and the both ends of the first deflector hole are logical with first respectively
Hole 28 is connected with the first half spherical cavities 221；Second positioning body 23 is mounted in first through hole 28, and the is provided on the second positioning body 23
Two deflector holes 25 and the second half spherical cavities 231, the both ends of the second deflector hole 25 connect respectively with first through hole 28 and the second half spherical cavities 231
Logical, the first half spherical cavities 221 and the second half spherical cavities 231 fasten to set and form spherical cavity；Valve ball 24 is mounted in spherical cavity.
By being used to install the cavity of valve ball 24 in this present embodiment as spherical hollow space, when 20 He of the first control valve of slurry flows
During the second control valve 30, it is not easy to the deposition of slurry occur, convenient for improving the flow velocity of slurry, prevent the appearance in whirlpool region.
The second positioning body 23 in the present embodiment is located at the one side of the close pumping cavity 11 of first through hole 28, the second water conservancy diversion
Hole 25 includes cylindricality hole section 251 and taper hole section 252.Wherein, cylindricality hole section 251 is connected with the second half spherical cavities 231；Taper hole section
252 first end is connected with cylindricality hole section 251, and the second end of taper hole section 252 is used to connect with suction inlet 13 or outlet 14, bores
Direction of the cross section of shape hole section 252 from close to cylindricality hole section 251 to away from cylindricality hole section 251 becomes larger, and further prevents
Slurry deposits in check valve.And valve ball 24 is chosen larger by correspondence, specifically can the diameter of valve ball 24 be arranged to column
1.4 to 1.6 times of the aperture of shape hole section 251, such as 1.5 times, the first positioning body 22 of check valve and the second positioning body 23 it is straight
Footpath is 1.4 to 16 times of valve ball 24, convenient for ensureing the gap between the first positioning body 22 and the second positioning body 23 and valve ball 24.
For the ease of being oriented to valve ball 24, the first control valve 20 and the second control valve 30 in the present embodiment further include
More straight pins 26, more straight pins 26 extend along the direction of the first deflector hole to the second deflector hole 25, and are disposed around valve ball
24 periphery, straight pin 26 are processed as smooth excessive as far as possible with 24 binding site of valve ball.It, should compared with traditional one-way valve designs
Design flow field evenly, minimal internal dead space is less, and slurry is not easy to deposit, and check valve is not easy stuck.
Preferably, the suction inlet 13 in the present embodiment and outlet 14 are conical opening, and the cross-sectional area of the conical opening is from remote
It is tapered into from pumping cavity 11 to close to the direction of pumping cavity 11, convenient for connecting with the first control valve 20 and the second control valve 30
Pass to the deposition for avoiding slurry.
Suction inlet 13 and the axis of outlet 14 are each perpendicular to the axis of the pump housing 10, and mounting hole 12 connects simultaneously with the bottom of groove
Extend along the axis of the pump housing 10, the axis of suction inlet 13 and outlet 14 is interlaced, and suction inlet 13 is than exporting 14 closer to peace
Fill hole 12 so that the medium of discharge has rotary motion, is more not easy to deposit.
The first irrigation channel 70 is provided on the pump housing 10 in the present embodiment, the axis of the first irrigation channel 70 along the pump housing 10
To extension；And the first control valve 20 further includes the 3rd deflector hole 27, the both ends of the 3rd deflector hole 27 respectively with spherical cavity and
One irrigation channel 70 connects.The second irrigation channel 80 is additionally provided on the pump housing 10 in the present embodiment, second irrigation channel 80
It is connected along the axially extending of the pump housing 10 and with outlet 14.
As it can be seen that the plunger metering pump of the present embodiment is provided with the first irrigation channel 70 and the second irrigation channel 80.Ensure
Plunger 40 sucks, discharge stroke can all have much larger than sucking or discharge rate material pumping cavity 11 and check valve inside recycle stream
Dynamic to rinse cavity and valve ball 24, flow at high speed avoids the deposition of solid particle in material, ensures that pump operation is normal.According to flow field point
It analyses and using experience, suction inlet 13 is easier to block, therefore the second irrigation channel 80 of the design is on the top and openr, the
Two control valves, 30 design position with respect to the first control valve 20 more lean on into end-cap assembly 50 some so that each stroke of plunger 40
The second irrigation channel 80 is blocked by plunger for some time, 70 circuit of the first irrigation channel is unique passage at this time, is carried out strong
System is rinsed, and suction inlet 13 is avoided to be blocked.Preferably, the second irrigation channel 80 of the invention uses the flushing hole of deflection so that
Medium flows through can generate rotation herein, improve velocity of medium at outlet valve.
There is gap, the width in gap is more than in slurry to be pumped between plunger 40 and mounting hole 12 in the present embodiment
Solid particle diameter.There is subtle gap between plunger 40 and mounting hole 12, gap is slightly larger than the solid of material oil-containing
The diameter of grain so under the premise of guarantee is plunger-actuated, reduces abrasion of the solid problem to plunger big end in material as far as possible,
Postpone plunger service life.
Plunger metering pump further includes airtight and watertight padding component 60, for the ease of installing airtight and watertight padding component 60, in the present embodiment
Mounting hole 12 there is expansion segment 121, which is located at the second end of the pump housing 10, during installation, by airtight and watertight padding component 60
It is set on plunger 40,
Specifically, airtight and watertight padding component 60 includes airtight and watertight padding 61 and gland 62, and airtight and watertight padding 61 is mounted on expansion segment
In 121, gland 62 is set on plunger 40 airtight and watertight padding 61 being limited in expansion segment 121.Flushing is provided on the pump housing 10
Hole 90, the flushing hole 90 extend to 40 surface of plunger through airtight and watertight padding 61.
The airtight and watertight padding 61 of the present invention adds the form of intermediate flushing hole 90 using two sections of fillers.The close pump of airtight and watertight padding 61
The front end of the part of cavity 11 is sent to set and scrapes feed ring, is afterwards packing section, guide ring is set between filler.Airtight and watertight padding 61 it is remote
Front end from 11 part of pumping cavity sets guide ring, is filler and guide ring interlaced arrangement afterwards.Both ends medium design punching
Ring is washed, external flushing hole 90, which can add, rinses oil flushing plunger 40.The specific material of filler and guide ring can be true according to material
Fixed, which can preferably ensure to pump the sealing performance of cavity 11.Preferably, plunger 40 is located at pump chamber for airtight and watertight padding 61
One end of body 11 is provided with overstriking section 41, and overstriking section 41 is adapted to pumping cavity 11, and the outer surface of overstriking section 41 is provided with ditch
Slot 42.Overstriking section 41 is set to accelerate the flow velocity of pump head internal flows in the front end of plunger 40,.Volume is streaked in the reciprocating motion of plunger 40
Much larger than the inventory of pump conveying, by piston reciprocation movement pump head top and the bottom passage is coordinated to be realized inside pumping cavity 11 strong
System agitation, increases substantially the flow velocity of pump housing materials inside, reduces the possibility of paste deposition, ensure plunger metering pump just
Often operation.A kind of service condition that the plunger metering pump of the present invention is set forth below is as follows：
As shown in Figure 1, contained in the experimental provision of DCL/Direct coal liquefaction 10kg/d using the plunger metering pump conveying of the invention
Admittedly measuring the coal slurry of 40-45%, flow is 0.5~1L/h, and 13 micro-positive pressure of suction inlet exports 14 pressure 19MPa.Pass through transmission mechanism
Eccentric wheel driving motor circumferential running is converted into the reciprocating motion of plunger, plunger 40 uses 38CrMoAl cure process, close
Packing material 61 uses tetrafluoro aramid fiber cornerite packing.It moves right in the operational process of pump in plunger 40, when starting induction stroke,
Cavity on the right side of 40 major part of plunger is subject to the extruding of plunger 40, and medium is transported by the second irrigation channel 80 and the first irrigation channel 70
40 left side of plunger is moved, achievees the purpose that stirring, at this time entirely pumping 11 internal volume of cavity becomes larger, and internal pressure becomes smaller, the
One control valve 20 is opened, and coal slurry medium flows into pump head.When plunger 40 is moved to the left, and starts discharge stroke, 41 left side of overstriking section
Volume reduces, and right side volume increase, medium moves to right side by the first irrigation channel 70 and the second irrigation channel 80 from left side,
Achieve the purpose that stirring, when plunger 40 blocks outlet 14, only move pressure to the left from the first irrigation channel 70 and rinse sucking
Mouth 13, the entire pump head internal volume of this process becomes smaller, and the first control valve 20 is closed, and the second control valve 30 is opened, certain media quilt
Discharge pump head.Using the plunger metering pump of import producer design before the invention is used, it can not be completed a wheel and feed for several hours
Pump is not just upper to be measured, and is opened and inspect and is found coal dust deposition.It is continuously real using the more rounds of higher concentration after plunger metering pump using the present invention
The amount of testing is normal, stability of flow.It can be seen from the above description that the above embodiments of the present invention realize following skill
Art effect：
(1) the small flow of conveying high-pressure difference that plunger metering pump of the invention can be stablized, high material containing stereoplasm.This plunger pump is adopted
Increase pump housing interior flushing with special designing runner to flow, avoid solids particles precipitate in material, it is stable；
(2) plungers pump plunger special designing of the invention, the big rear end of plunger leading portion is small, and plunger streaks volume much larger than conveying
Amount, to convey and flushing provides power；
(3) suction inlet of plunger pump of the invention and outlet, which are set, has dislocation, and suction inlet rinse mouth ensures sucking rearward
Stroke and the first control valve of discharge stroke are bound to be washed into；
(4) through hole of the outlet of plunger pump of the present invention is inclined so that the medium of discharge has rotary motion, does not allow more
Easily deposition；
(5) check valve of plunger pump of the invention uses the ball valve of special designing, and targeting part uses straight pin,
Valve ball suitably choosing is big, and inner flow passage excessively avoids dead zone using circular arc, ensures that interior flow field is uniform, ensures the stabilization of pump operation；
(6) plunger metering pump of the invention intermediate rinse is added using rear and front end by the way of, not only protected plunger sealing guarantor again
Barrier operation steady in a long-term.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of plunger metering pump, which is characterized in that including：
The pump housing (10) sets pumping cavity (11) and the mounting hole connected with the pumping cavity (11) on the pump housing (10)
(12), suction inlet (13) and outlet (14)；
First control valve (20), first control valve (20) sentence the control suction inlet mounted on the suction inlet (13)
(13) be turned on and off；
Second control valve (30), second control valve (30) are mounted on the outlet (14) and sentence the control outlet (14)
It is turned on and off；
Plunger (40), the plunger (40) are movably mounted in the mounting hole (12) and extend to the pumping cavity
(11)；
Wherein, the pump housing (10), first control valve (20), second control valve (30) and the plunger (40) are equal
By cure process；
First control valve (20) and second control valve (30) include：
Valve body (21) is provided with first through hole (28) on the valve body (21)；
First positioning body (22), first positioning body (22) are mounted in the first through hole (28), first positioning body
(22) the first deflector hole and the first half spherical cavities (221) be set on, the both ends of first deflector hole respectively with the first through hole
(28) connected with the first half spherical cavity (221)；
Second positioning body (23), second positioning body (23) are mounted in the first through hole (28), second positioning body
(23) be provided with the second deflector hole (25) and the second half spherical cavities (231) on, the both ends of second deflector hole (25) respectively with institute
It states first through hole (28) to connect with the second half spherical cavity (231), the first half spherical cavity (221) and the second half spherical cavity
(231) fasten to set and form spherical cavity；
Valve ball (24), the valve ball (24) are mounted in the spherical cavity；
It is provided with the first irrigation channel (70) on the pump housing (10), first irrigation channel (70) is along the pump housing (10)
It is axially extending；
First control valve (20) further includes the 3rd deflector hole (27), the both ends of the 3rd deflector hole (27) respectively with it is described
Spherical cavity is connected with first irrigation channel (70).
2. plunger metering pump according to claim 1, which is characterized in that the pump housing (10), first control valve
(20), the surface contacted with slurry to be pumped of second control valve (30) and the plunger (40) is both provided with hard
Material layer.
3. plunger metering pump according to claim 1, which is characterized in that the first end of the pump housing (10) is provided with recessed
Slot, the plunger metering pump further include end-cap assembly (50), and the end-cap assembly (50) is arranged on the first of the pump housing (10)
It holds to seal the groove to form the pumping cavity (11).
4. plunger metering pump according to claim 1, which is characterized in that second positioning body (23) is located at described first
The one side of the close pumping cavity (11) of through hole (28), second deflector hole (25) include：
Cylindricality hole section (251), the cylindricality hole section (251) connect with the second half spherical cavity (231)；
Taper hole section (252), the first end of the taper hole section (252) are connected with the cylindricality hole section (251), the bellmouth
Section (252) second end be used for the suction inlet (13) or it is described outlet (14) connect, the taper hole section (252) it is transversal
Direction of the face from close to the cylindricality hole section (251) to away from the cylindricality hole section (251) becomes larger.
5. plunger metering pump according to claim 4, which is characterized in that the diameter of the valve ball (24) is the cylindrical hole
1.4 to 1.6 times of the aperture of section (251).
6. plunger metering pump according to claim 4, which is characterized in that first control valve (20) and second control
Valve (30) processed further includes more straight pins (26), and the more straight pins (26) are led along first deflector hole to described second
The direction extension of discharge orifice (25), and it is disposed around the periphery of the valve ball (24).
7. plunger metering pump according to claim 5, which is characterized in that the suction inlet (13) and the outlet (14) are equal
For conical opening, the cross-sectional area of the conical opening is from away from the pumping cavity (11) to the side of the close pumping cavity (11)
To tapering into.
8. plunger metering pump according to claim 1, which is characterized in that be provided with the second flushing on the pump housing (10) and lead to
Road (80), second irrigation channel (80) connect along the axially extending of the pump housing (10) and with the outlet (14).
9. plunger metering pump according to claim 1, which is characterized in that the plunger (40) and the mounting hole (12) it
Between there is gap, the width in the gap is more than the diameter of the solid particle in slurry to be pumped.
10. plunger metering pump according to claim 1, which is characterized in that the mounting hole (12) has expansion segment
(121), the expansion segment (121) is located at the second end of the pump housing (10), and the plunger metering pump further includes airtight and watertight padding group
Part (60), the airtight and watertight padding component (60) are set on the plunger (40).
11. plunger metering pump according to claim 10, which is characterized in that the airtight and watertight padding component (60) includes sealing
Filler (61) and gland (62), the airtight and watertight padding (61) are mounted in the expansion segment (121), and the gland (62) is set in
It is interior the airtight and watertight padding (61) is limited to the expansion segment (121) on the plunger (40).
12. plunger metering pump according to claim 11, which is characterized in that be provided with flushing hole on the pump housing (10)
(90), the flushing hole (90) extends to the plunger (40) surface through the airtight and watertight padding (61).
13. plunger metering pump according to claim 3, which is characterized in that the suction inlet (13) and the axis for exporting (14)
Line is each perpendicular to the axis of the pump housing (10), and the mounting hole (12) connects with the bottom of the groove and along the pump housing
(10) axis of axis extension, the suction inlet (13) and the outlet (14) is interlaced, and the suction inlet (13) compares
Export (14) are closer to the mounting hole (12).
14. plunger metering pump according to any one of claim 1 to 13, which is characterized in that the position of the plunger (40)
One end of the pumping cavity (11) is provided with overstriking section (41), the overstriking section (41) and the pumping cavity (11) are suitable
Match somebody with somebody, and the outer surface of the overstriking section (41) is provided with groove (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610403738.1A CN106050596B (en) | 2016-06-07 | 2016-06-07 | Plunger metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610403738.1A CN106050596B (en) | 2016-06-07 | 2016-06-07 | Plunger metering pump |
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| Publication Number | Publication Date |
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| CN106050596A CN106050596A (en) | 2016-10-26 |
| CN106050596B true CN106050596B (en) | 2018-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610403738.1A Active CN106050596B (en) | 2016-06-07 | 2016-06-07 | Plunger metering pump |
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| CN (1) | CN106050596B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345517A (en) * | 2017-08-21 | 2017-11-14 | 王道红 | A kind of pump head of diaphragm metering pump |
| CN108506183B (en) * | 2018-03-21 | 2019-05-21 | 武汉洛特福动力技术有限公司 | Big flow multi-plunger permanent magnetism metering pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225809A (en) * | 2008-02-01 | 2008-07-23 | 大连劳雷流体设备有限公司 | Valve box type deposition-prevention plunger pump |
| CN201696248U (en) * | 2010-06-25 | 2011-01-05 | 罗献尧 | Pump head of plunger metering pump |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0343773B1 (en) * | 1988-03-23 | 1993-11-18 | Kabushiki Kaisha Little Rock | Fluid pump apparatus and valve device |
| CN101435422B (en) * | 2008-12-16 | 2010-06-09 | 上海化工研究院 | Abrasion-proof plunger pump |
| CN101725521B (en) * | 2009-11-27 | 2012-05-30 | 煤炭科学研究总院 | Solid medium contained plunger pump stuffing sealing device |
| CN202746178U (en) * | 2012-08-08 | 2013-02-20 | 汉胜工业设备(上海)有限公司 | Plunger pump slurry application structure |
| CN202768381U (en) * | 2012-08-17 | 2013-03-06 | 马宝忠 | Oil well pump anti-blocking valve with rotating runners |
| CN203499989U (en) * | 2013-08-14 | 2014-03-26 | 泉州市南星机械制造有限公司 | Taper sleeve |
| CN103452831B (en) * | 2013-08-20 | 2016-02-24 | 米顿罗工业设备（上海）有限公司 | A kind of automatic control pressure vent being applied to sunk type pump head in metering pump |
| CN203584706U (en) * | 2013-08-20 | 2014-05-07 | 米顿罗工业设备（上海）有限公司 | Middle-high pressure outlet plunger pump head structure for metering pump |
-
2016
- 2016-06-07 CN CN201610403738.1A patent/CN106050596B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225809A (en) * | 2008-02-01 | 2008-07-23 | 大连劳雷流体设备有限公司 | Valve box type deposition-prevention plunger pump |
| CN201696248U (en) * | 2010-06-25 | 2011-01-05 | 罗献尧 | Pump head of plunger metering pump |
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| CN106050596A (en) | 2016-10-26 |
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