CN105756881B - Plunger pump with position limiting structure and its application - Google Patents
Plunger pump with position limiting structure and its application Download PDFInfo
- Publication number
- CN105756881B CN105756881B CN201410775074.2A CN201410775074A CN105756881B CN 105756881 B CN105756881 B CN 105756881B CN 201410775074 A CN201410775074 A CN 201410775074A CN 105756881 B CN105756881 B CN 105756881B
- Authority
- CN
- China
- Prior art keywords
- plunger
- pump
- pump housing
- magnet
- plunger pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Electromagnetic Pumps, Or The Like (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
A kind of plunger pump and its application with position limiting structure, the plunger pump include the pump housing and the magnetic coil positioned at pump housing periphery, the pump housing include first pump housing and with matched second pump housing of first pump housing.A fluid channel is collectively formed with second pump housing in first pump housing, the fluid channel is equipped with inlet valve, outlet valve and the pump chamber between the inlet valve and the outlet valve, and the fluid channel includes second channel, main spring and the plunger for being held in the main spring.The rear end of the plunger is equipped with the first magnet, and the plunger pump is additionally provided with the second magnet positioned at first magnet rear end, and first magnet is identical as the polarity of the second magnet.When the magnetic coil is powered, first magnet repels each other with second magnet to limit the position that the plunger moves backward, and reduces noise.The plunger pump handles motor exhaust for urea injection system.
Description
Technical field
The present invention relates to a kind of pump and its application more particularly to a kind of plungers that can be applied in exhaust treatment system
Pump.
Background technology
Plunger pump in the prior art generally includes the pump housing, the plunger being installed in the pump housing, coordinates with the plunger
Resetting spring and magnetic coil positioned at pump housing periphery.When the magnetic coil is powered, the electromagnetic force meeting of generation
Plunger motion is driven, at the same time, the inlet valve of plunger pump is opened, and outlet valve is closed, and vacuum sealing space is formed, in this process
In, external atmospheric pressure is by the fluid of unit quantity（For example, urea liquid）It is pressed into pump chamber；When the magnetic coil powers off, institute
It states plunger and returns to initial position under the action of the resetting spring, the fluid of unit quantity is discharged plunger in the process, into
And complete the cycle of a pumping dosed fluid.
Invention content
The purpose of the present invention is to provide a kind of noise lower plunger pumps and its application with position limiting structure.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of plunger pump with position limiting structure comprising
The pump housing and magnetic coil positioned at pump housing periphery, the pump housing include first pump housing and match with first pump housing
Second pump housing closed；First pump housing includes outlet canister portion and the first mounting portion, second pump housing include into mouth tube portion
And it is collectively formed one with matched second mounting portion of first mounting portion, first pump housing and second pump housing
Fluid channel, the fluid channel are equipped with inlet valve, outlet valve and between the inlet valve and the outlet valves
Pump chamber, the fluid channel include be set to it is described into the second channel in mouth tube portion, it is described into being also equipped with master in mouth tube portion
Spring and the plunger for being held in the main spring, the main spring close to described into mouth tube portion, the inlet valve with it is described go out
Mouth valve is close to the outlet canister portion；The plunger can back and forth be transported under the action of the magnetic coil and the main spring
Dynamic, the rear end of the plunger is equipped with the first magnet, and the plunger pump is additionally provided with the second magnet positioned at first magnet rear end,
First magnet is identical as the polarity of the second magnet；When the magnetic coil is powered, first magnet with it is described
Second magnet repels each other to limit the position that the plunger moves backward.
As further improved technical scheme of the present invention, first magnet is fixed on the rear end of the plunger.
As further improved technical scheme of the present invention, the plunger pump is equipped with the protrusion being located in the second channel
Portion, second magnet are fixed on the protrusion；The protrusion is provided separately with second pump housing, is then assembled in
Together；Or the protrusion is integrally formed with second pump housing.
As further improved technical scheme of the present invention, the main spring is socketed on the protrusion；In the magnetic
When property coil is not powered on, the protrusion at least extends forwardly into the middle part of the main spring.
As further improved technical scheme of the present invention, first pump housing and second pump housing are by plastic material
It is made.
As further improved technical scheme of the present invention, the plunger includes base portion, extends back from the base portion
Lug boss and the extension extended forward from the base portion, the base portion, the lug boss and the extension are in circle
Column, wherein the diameter of the base portion is more than the diameter of the extension.
As further improved technical scheme of the present invention, the plunger pump includes the cylinder body group being socketed on the plunger
Part, the housing assembly include cylinder body and the sealing shroud that is installed on the cylinder body, and the extension passes through the sealing shroud
It is accommodated in the cylinder body.
As further improved technical scheme of the present invention, first mounting portion includes mounting wall, and the mounting wall is set
Have the first fluting, circumferentially with it is described first fluting be connected to second fluting and from it is described second slot rearwardly through first
Guide channel；Second mounting portion is equipped with the first convex block, and first convex block passes through first guide channel successively in assembling
And second fluting, it is then circumferentially screwed in again in first fluting, the first fluting width along the longitudinal direction is big
In the width of second fluting along the longitudinal direction.
As further improved technical scheme of the present invention, it is additionally provided on the barrel of the protrusion and the second channel
The trepanning of connection.
Present invention further teaches a kind of application of plunger pump with position limiting structure in urea injection system, the urea
For spraying system to handle motor exhaust, the urea injection system includes urea tank and nozzle, the plunger pump connection
Between the urea tank and the nozzle, the plunger pump to by the urea solution pump in urea tank to the nozzle, institute
It is the plunger pump with aforementioned structure to state plunger pump.
Compared to the prior art, plunger pump of the invention is when magnetic coil is powered, by first magnet with it is described
The effect of repelling each other of second magnet, to limit the position that the plunger moves backward.So set, the plunger need not with it is corresponding
Position limiting structure carry out practical contact, to reduce noise.
Description of the drawings
Fig. 1 is the schematic diagram being applied to the plunger pump of the present invention in exhaust treatment system.
Fig. 2 is the stereoscopic schematic diagram of plunger pump of the present invention.
Fig. 3 is the stereoscopic schematic diagram of another angles of Fig. 2.
Fig. 4 is the part isometric exploded view of plunger pump of the present invention.
Fig. 5 is the part isometric exploded view of Fig. 4 middle pump bodies.
Fig. 6 is the part isometric exploded view of another angles of Fig. 5.
Fig. 7 is the stereogram exploded view of first pump housing in Fig. 5.
Fig. 8 is the stereogram exploded view of housing assembly in Fig. 5.
Fig. 9 is the stereogram exploded view of plunger in Fig. 5, main spring and second pump housing etc..
Figure 10 is the diagrammatic cross-section after plunger pump removal inner body of the present invention.
Figure 11 is the diagrammatic cross-section that plunger pump of the present invention is equipped with inner body in first embodiment, magnetic at this time
Coil is not yet powered, and the plunger is located at initial position.
Figure 12 is after the magnetic coil in Figure 11 is powered, and the plunger moves backward the section signal positioned at on-position
Figure.
Figure 13 is diagrammatic cross-section of the plunger pump of the present invention in second embodiment.
Figure 14 is diagrammatic cross-section of the plunger pump of the present invention in third embodiment.
Figure 15 is diagrammatic cross-section of the plunger pump of the present invention in the 4th embodiment.
Specific implementation mode
It please join shown in Fig. 1, present invention is disclosed a kind of plunger pumps 100 with position limiting structure, can be applied to tail
In gas processing system 200.The filter that the exhaust treatment system 200 includes urea tank 201, is connected with the urea tank 201
202, urine will be sprayed from the plunger pump 100 of extracted urea solution in the urea tank 201 and into offgas duct 203
The nozzle 204 of element.For urea liquid by atomization through being catalytically decomposed into ammonia in the offgas duct 203, the ammonia can
Redox reaction occurs with the oxynitrides in tail gas and generates harmless nitrogen and water, to reduce the row of oxynitrides
It puts.It is well known to the technical personnel in the technical field in view of this tail gas disposal technique, details are not described herein by the present invention.
In illustrative embodiments of the present invention, the plunger pump 100 has function of measuring, internal moving components often past
The urea liquid of equivalent can once be pumped out by returning operation.The plunger pump 100 is a kind of working method of pulsed, if continuously
Provide electronic and break pulse, what the plunger pump 100 was capable of continuous impulse formula pumps out liquid.To the stream of increase (or reduction) pump
Amount, it is only necessary to which the frequency for increasing the electronic and break pulse of (or reduction) pump can.
It please join shown in Fig. 2 to Fig. 4, the plunger pump 100 includes the pump housing 1, the magnetic coil 2 positioned at 1 periphery of the pump housing
And the holder 3 positioned at 2 periphery of the magnetic coil.The pump housing 1 is fixed on the holder 3.It is illustrated in the present invention
In embodiment, the pump housing 1 is fixed to by screw 4 on the holder 3.
It please join shown in Fig. 4 and Fig. 5, in illustrative embodiments of the present invention, the pump housing 1 substantially prolongs along the longitudinal direction
Stretch comprising first pump housing 5 and with first pump housing, 5 matched second pump housing 6.In illustrative embodiments of the present invention
In, the shell of first pump housing 5 and the shell of second pump housing 6 are made of plastic material, so set, one side energy
Enough reduce cost；On the other hand heat transfer that the magnetic coil 2 generates at work can also be reduced to the pump housing 1
It is internal.In addition, first pump housing 5 and second pump housing 6 are provided separately, then it is assemblied together again, mould can be reduced
Have cost, while also allowing for the assembly of its inner body.
It please join shown in Fig. 7, Figure 10 and Figure 11, first pump housing 5 is substantially in funnel-form comprising is located at the outlet of front end
Canister portion 51, the first mounting portion 52 being connected with the outlet canister portion 51 and the front and back first passage through first pump housing 5
53.First mounting portion 52 is compared to the outlet canister portion 51 in widened horn-like.The urea liquid is via described
One channel 53 and pumped out to the nozzle 204.First mounting portion 52 includes first to be connected with the first passage 53
Cavity 521, the mounting wall 522 for being centered around the outside of first cavity 521, positioned at 522 both sides of the mounting wall flange 523 with
And several positioning columns 524 protruded out backward.The top of the mounting wall 522 is equipped with the first fluting 5221, circumferentially with described the
One fluting 5221 connection second fluting 5222 and from it is described second fluting 5222 rearwardly through the first guide channel 5220.Institute
It states the width of the first fluting 5221 along the longitudinal direction and is more than the width of second fluting 5222 along the longitudinal direction.Similarly, institute
State the 4th fluting 5224 that the bottom of mounting wall 522 is equipped with third fluting 5223, is circumferentially connected to third fluting 5223
And from it is described 4th fluting 5224 rearwardly through the second guide channel 5225.The width of the third fluting 5223 along the longitudinal direction
Degree is more than the width of the 4th fluting 5224 along the longitudinal direction.First pump housing 5 is additionally provided with mounted on first cavity
The first sealing ring 54 in 521.Please join shown in Figure 11, first sealing ring 54 after mounting be located at first pump housing 5 with
And it between second pump housing 6, to improve leakproofness, prevents from leaking outside.
It please join shown in Fig. 5, Fig. 6 and Fig. 9, second pump housing 6 includes into mouth tube portion 61 and with described into mouth tube portion 61
The second connected mounting portion 62.After assembling, first sealing ring 54 is socketed on the front end of second mounting portion 62.It is described into
Mouth tube portion 61 is equipped with pre-and post perforative second channel 611.Second mounting portion 62 be located at it is described into the front end of mouth tube portion 61, and
Compared to described into the protrusion annular in shape of mouth tube portion 61.The top and bottom of second mounting portion 62 are respectively equipped with the first convex block
621 and second convex block 622.
Second pump housing 6 includes the main spring 63 being installed in the second channel 611, is held in the main bullet backward
The plunger 64 of spring 63 and the housing assembly 65 being socketed on the plunger 64.The main spring 63 is compressed spring, first
Under beginning state（When i.e. the magnetic coil 2 is not powered on）Apply certain pretightning force to the plunger 64.
The plunger 64 includes base portion 641, is extended back from the base portion 641 lug boss 642, from the base portion 641
The extension 643 and the front and back third channel 644 through the plunger 64 extended forward.The base portion 641, the lug boss
642 and the extension 643 it is cylindrical, wherein the diameter of the base portion 641 be more than the extension 643 diameter.
So set, relatively large channel on the one hand can be formed in the base portion 641, on the other hand it is convenient in the extension
Damping ring 645 is installed on 643.In embodiments of the present invention, the plunger 64 is made of stainless steel soft magnet material.
It please join shown in Fig. 9 and Figure 11, in the first embodiment of the present invention, the plunger 64 further includes slotting from front to back
Enter the inlet valve 68 in the third channel 644.The inlet valve 68 is check valve comprising is equipped with the first valve of the first valve port
Seat 681, with 681 phase of the first valve seat extruding the first spring 682 and with first spring, 682 matched first valve
Core 683.In the initial state, first spool 683 closes first valve port to the inlet valve 68.When the inlet valve
When 68 pressure being subject to are more than the retentivity of first spring 682, first spring 682 is compressed, first valve port
It is opened.When assembling, the inlet valve 68 is integrally inserted into the front end in the third channel 644 and positioned at the plunger 64.
In the first embodiment of the present invention, the inlet valve 68 is an independent element in itself, can be whole from supplier there
Body is bought, and to simplify design, facilitates installation.
It please join shown in Fig. 8 and Figure 11, the housing assembly 65 includes cylinder body 651, the sealing being installed on the cylinder body 651
Set 652 and the installation sheet 653 for being connected to 652 rear end of the sealing shroud.The cylinder body 651 includes abutting part 6511, described in
The receiving portion 6512 and the front and back appearance through the abutting part 6511 and described accommodation section 6512 that abutting part 6511 extends forward
Receive slot 6513.The diameter of described accommodation section 6512 is less than the diameter of the abutting part 6511, in order in described accommodation section 6512
External be socketed the second sealing ring 6516.The abutting part 6511 is equipped with the groove 6514 for accommodating the sealing shroud 652.In order to add
Strong sealing, is equipped with third sealing ring 654 between the cylinder body 651 and the sealing shroud 652.
It please join shown in Fig. 8 and Figure 11, in the first embodiment of the present invention, the housing assembly 65 further includes from forward direction
The outlet valve 67 being inserted into afterwards in the holding tank 6513.The outlet valve 67 is check valve comprising is equipped with the of the second valve port
Two valve seats 671, the second spring 672 squeezed with 671 phase of the second valve seat and with the second spring 672 matched the
Two spools 673.In the initial state, second spool 673 closes second valve port to the outlet valve 67.When it is described go out
When the pressure that mouth valve 67 is subject to is more than the retentivity of the second spring 672, the second spring 672 is compressed, and described second
Valve port is opened.When assembling, the outlet valve 67 is integrally inserted into the holding tank 6513 and before the cylinder body 651
End.In the first embodiment of the present invention, the outlet valve 67 is an independent element in itself, can be from supplier there
Entirety is bought, and to simplify design, facilitates installation.
When assembling, the main spring 63 is packed into second pump housing 6 first；Then, the plunger 64 and institute are packed into
Housing assembly 65 is stated, wherein the extension 643 sequentially passes through the installation sheet 653, sealing shroud 652 and third sealing ring
654 and enter in the holding tank 6513；Then, second pump housing 6 and first pump housing 5 are assembled.When assembling,
First convex block 621 first guide channel 5220 and second is corresponded to respectively with second convex block 622 first to guide
Slot 5225；Then, apply certain extruding force in the horizontal direction, second pump housing 6 and first pump housing 5 are mutually leaned on
Closely, first, second convex block 621,622 is located in the described second, the 4th fluting 5222,5224 at this time；Then, it then applies
Add certain twisting resistance, first, second convex block 621,622 is made to screw in described first, third fluting 5221,5223 respectively
It is interior.Finally, second pump housing 6 is fitted together with first pump housing 5.At this point, the main spring 63 provides certain pressure
Contracting amount carries out precompressed to the plunger 64.Please join shown in Figure 11, after assembling, the main spring 63 close to described into mouth tube portion 61,
The inlet valve 68 is close to the outlet canister portion 51 with the outlet valve 67.
It please join shown in Figure 10 and Figure 11, in illustrative embodiments of the present invention, the rear end of the plunger 64 is equipped with first
Magnet 646, the plunger pump 100 are additionally provided with the second magnet 612 positioned at 646 rear end of the first magnet.First magnet
646 is identical as the polarity of second magnet 612.So set, when the magnetic coil 2 is powered, by first magnetic
Iron 646 repels each other with second magnet 612, to limit the position that the plunger 64 moves backward.In the reality that the present invention illustrates
Apply in mode, the plunger 64 need not with corresponding position limiting structure is practical is contacted, to reduce noise.In addition, can
To understand, if the limit using the formula that contacts with each other designs, when the plunger 64 is collided with corresponding position limiting structure, gesture
Certain heat must be generated.Electromagnetic force influences very sensitive and reactive spring force to temperature also has the influence of accidentalia to cause
Keep the stability of each resultant force excessively poor, and then causes the measurement error of pump larger.In addition, if using the formula that contacts with each other limit
Position design, when the plunger 64 is collided with corresponding position limiting structure, especially after this multiple use, easy tos produce position
On error so that the precision of plunger pump is relatively low.
In illustrative embodiments of the present invention, first magnet 646 is fixed on the rear end of the plunger 64.It is fixed
Mode includes but not limited to using tube-in-tube structure, glue etc..
The pump housing 1 further includes the protrusion 66 positioned at 64 rear of the plunger and in the second channel 611.Please
Join shown in Figure 11, in the first embodiment of the present invention, the shell of the protrusion 66 and second pump housing 6 be one at
Type.In this embodiment, it is possible to reduce the quantity of part simplifies assembly.Preferably, on the barrel of the protrusion 66
It is additionally provided with the trepanning 661 being connected to the second channel 611, to optimize the flowing of fluid when the plunger 64 moves backward.
Certainly, please join shown in Figure 14, in the other embodiment of the present invention, the protrusion 66 and second pump housing
6 shell can also be provided separately, and be then assemblied together again.In this embodiment, the protrusion 66 can design
At the material different from the shell of second pump housing 6, such as metal, so as to ensure longer service life.
In illustrative embodiments of the present invention, second magnet 612 is fixed on the protrusion 66.
In addition, without departing from the case in the spirit of the invention, present invention further teaches other several embodiments, simple one by one
It is described as follows.
It please join shown in Figure 13, second embodiment of the present invention is roughly the same with first embodiment shown in Figure 11,
Difference lies in inlet valves 68 ' and the inlet valve 68 in the first embodiment to be slightly different.In the second embodiment,
The inlet valve 68 ' is not modular design, and the first spring 682 ' is to draw high spring, one end of first spring 682 '
（It is rear end in the present embodiment）It is fixed on the step surface in the base portion 641, the other end（Before being in the present embodiment
End）It is connected with the first spool 683 '.In the case where the magnetic coil 2 is not powered on, first spool 683 ' is described
The front end of the extension 643 is closed under the pulling force of one spring 682 '.The front end of the extension 643 can play similar
The function of first valve seat 681.After the magnetic coil 2 is powered, the plunger 64 moves backward, when the inlet valve
When 68 ' the pressure being subject to are more than threshold value, the pressure can further stretch first spring 682 ', at this time the inlet valve
68 ' are opened.
It please join shown in Figure 14, third embodiment of the present invention is roughly the same with second embodiment shown in Figure 13,
Difference lies in：In the second embodiment, the protrusion 66 and the shell of second pump housing 6 are integrally formed；
And in the third embodiment, the protrusion 66 and the shell of second pump housing 6 are to be provided separately, and are then assembled again
To together.
It please join shown in Figure 15, the 4th embodiment of the invention is roughly the same with second embodiment shown in Figure 13,
Difference lies in outlet valves 67 ' and the outlet valve 67 in the second embodiment to be slightly different.In the 4th embodiment,
The outlet valve 67 ' is not modular design, and second spring 672 ' is compressed spring, one end of the second spring 672 '
（It is front end in the present embodiment）It is fixed on the step surface in the outlet canister portion 51, the other end（In the present embodiment
For rear end）It is connected with the second spool 673 '.The front end of the cylinder body 651 can play the function of similar second valve seat 671.
In the case where the magnetic coil 2 is not powered on, second spool 673 ' is under the pressure of the second spring 672 ' by institute
The front end for stating cylinder body 651 closes.After the magnetic coil 2 is powered, the plunger 64 moves backward, when the inlet valve
68 ' open.Again after the magnetic coil 2 powers off, the plunger 64 travels forward, and fluid pressure overcomes the second spring
672 ', the outlet valve 67 ' is opened.
It please join shown in Fig. 4, the magnetic coil 2 is equipped with pre-and post perforative through-hole 21.
3 generally rectangular shaped frame shaped of the holder comprising front bulkhead 31, aft bulkhead 32 and the connection front bulkhead 31
With the two side 33 of the aft bulkhead 32.The front bulkhead 31 is equipped with the first trepanning 311 corresponding to the through-hole 21, corresponds to
The location hole 312 of the positioning column 524 and with the threaded hole 313 being screwed into for the screw 4.The aft bulkhead 32 be equipped with pair
Second trepanning 321 of through-hole 21 described in Ying Yu.The size of second trepanning 321 is less than first trepanning 311.In the present invention
In embodiment illustrated, the holder 3 is made of metal material, to realize preferable heat dissipation.
In order to concentrate magnetism intensity, the plunger pump 100 to be additionally provided with the sleeve member 7 being installed in the through-hole 21.It is described
Sleeve member 7 includes the first sleeve member 71 for being connected to 321 outer rim of the second trepanning, is pressed against each other with first sleeve member 71
Second sleeve part 72 and the 3rd sleeve part 73 being pressed against each other with the second sleeve part 72.In illustrative embodiments of the present invention
In, first sleeve member 71 is made of metal material with the 3rd sleeve part 73, and the second sleeve part 72 is by plastics system
At such setting, on the one hand, the second sleeve part 72 is capable of providing certain fitting allowance；On the other hand, by metal material
Manufactured first, 3rd sleeve part 71,73 can collect the magnetic line of force, reduce magnetic force loss.First sleeve member 71 is connected to
Second trepanning, 321 outer rim is to realize limit.The 3rd sleeve part 73 extends into first trepanning 311.
Just the operation principle of the present invention is described below.
It please join shown in Figure 11, urea liquid enters the column from the second channel 611 and the third channel 644
In plug pump 100.In the case where the magnetic coil 2 is not powered on, the inlet valve 68 close, the urea liquid be only filled with into
The pipeline of 68 rear end of mouth valve.
It please join shown in Figure 12, when the magnetic coil 2 is powered, under the action of electromagnetic force, the plunger 64 is by backward
Driving, and then compress the main spring 63.At this point, the inlet valve 68 is opened, urea liquid passes through the import along arrow
Valve 68 enters in pump chamber 8.The pump chamber 8 is between the inlet valve 68 and the outlet valve 67.In the process, by
First magnet 646 repels each other with second magnet 612, can limit the position that the plunger 64 moves backward.It is this
The advantages of design, is that since plunger pump 100 will produce certain temperature during the work time, and this temperature can influence main bullet
The rear end attenuation ratio of the mechanical performance of spring 63, especially 63 decrement of main spring is more serious.If not to the main spring 63 into
The limit of row in advance, can not ensure the stroke of the plunger 64, thus cannot also control well into the urine in pump chamber 8
The amount of plain solution.In addition, this design can avoid the plunger 64 from being in direct contact with corresponding position limiting structure, to drop
Low noise.When the magnetic coil 2 powers off again, the main spring 63 resets, and plunger 64 is driven forwards at this time, described
Urea liquid in pump chamber 8, which is squeezed, opens the outlet valve 67, to pump out urea.
It is appreciated that a fluid channel is collectively formed with second pump housing 6 in first pump housing 5, described first is logical
Road 53, second channel 611 and third channel 644 are a part for the fluid channel.The fluid channel is equipped with institute
Inlet valve 68 and the outlet valve 67 are stated, by controlling the opening of the inlet valve 68 and the outlet valve 67, breaking and realize system
Work.For example, when the inlet valve 68 is opened, outlet valve 67 is closed, realizes and fill urea liquid into the pump chamber 8；
When the inlet valve 68 is closed, outlet valve 67 is opened, the urea liquid in the pump chamber 8 is pumped out.
Preferably, when the magnetic coil 2 is not powered on, the protrusion 66 at least extends to forward the main spring 63
Middle part.So set, the stroke for shortening the plunger 64 that can be larger.Since the flow that per stroke pumps out has dropped,
Also it is conducive to realize preferable atomization, to improve the efficiency of vent gas treatment.In addition, by the barrel of the protrusion 66
The trepanning 661 being connected to the second channel 611 is set, when the plunger 64 moves backward, 66 periphery of the protrusion
Liquid can pass through the trepanning 661, dead volume be avoided the formation of, conducive to the stationarity for ensuring that the plunger 64 moves backward.
Above example is merely to illustrate the present invention and not limits technical solution described in the invention, to this specification
Understanding should be based on person of ordinary skill in the field, such as " front and back to run through " refers to not installing other parts
It is through before, then the description for example to "front", "rear", "left", "right", "upper", "lower" isotropy, although this specification
With reference to the above embodiments to present invention has been detailed description, still, it will be understood by those of ordinary skill in the art that,
Person of ordinary skill in the field still can modify or equivalently replace the present invention, and all do not depart from the present invention
Spirit and scope technical solution and its improvement, should all cover in scope of the presently claimed invention.
Claims (10)
1. a kind of plunger pump with position limiting structure comprising the pump housing and the magnetic coil positioned at pump housing periphery, it is described
The pump housing include first pump housing and with matched second pump housing of first pump housing；First pump housing include outlet canister portion with
And first mounting portion, second pump housing include into mouth tube portion and with matched second mounting portion of first mounting portion,
A fluid channel is collectively formed with second pump housing in first pump housing, and the fluid channel is equipped with inlet valve, outlet
Valve and the pump chamber between the inlet valve and the outlet valve, the fluid channel are described into mouth tube portion including being set to
Interior second channel, described into being also equipped with main spring in mouth tube portion and be held in the plunger of the main spring, the main bullet
For spring close to described into mouth tube portion, the inlet valve is close to the outlet canister portion with the outlet valve；The plunger can be in institute
It states and moves back and forth under the action of magnetic coil and the main spring, it is characterised in that：The rear end of the plunger is equipped with the first magnetic
Iron, the plunger pump are additionally provided with the second magnet positioned at first magnet rear end, first magnet and second magnet
Polarity it is identical；When the magnetic coil is powered, first magnet repels each other with second magnet to limit the plunger
The position moved backward.
2. plunger pump as described in claim 1, it is characterised in that：First magnet is fixed on the rear end of the plunger.
3. plunger pump as described in claim 1, it is characterised in that：The plunger pump is equipped with convex in the second channel
Go out portion, second magnet is fixed on the protrusion；The protrusion is provided separately with second pump housing, is then assembled
Together；Or the protrusion is integrally formed with second pump housing.
4. plunger pump as claimed in claim 3, it is characterised in that：The main spring is socketed on the protrusion；Described
When magnetic coil is not powered on, the protrusion at least extends forwardly into the middle part of the main spring.
5. plunger pump as described in claim 1, it is characterised in that：First pump housing and second pump housing are by plastic cement material
Material is made.
6. plunger pump as described in claim 1, it is characterised in that：The plunger includes base portion, extends back from the base portion
Lug boss and the extension that extends forward from the base portion, the base portion, the lug boss and the extension are in
It is cylindric, wherein the diameter of the base portion is more than the diameter of the extension.
7. plunger pump as claimed in claim 6, it is characterised in that：The plunger pump includes the cylinder body being socketed on the plunger
Component, the housing assembly include cylinder body and the sealing shroud that is installed on the cylinder body, and the extension passes through the sealing
Set is accommodated in the cylinder body.
8. plunger pump as described in claim 1, it is characterised in that：First mounting portion includes mounting wall, the mounting wall
The second fluting for be connected to equipped with the first fluting, circumferentially with first fluting and from described second slot rearwardly through the
One guide channel；Second mounting portion is equipped with the first convex block, and first convex block is guided by described first successively in assembling
Then slot and the second fluting are circumferentially screwed in again in first fluting, the width of first fluting along the longitudinal direction
More than the width of second fluting along the longitudinal direction.
9. plunger pump as claimed in claim 3, it is characterised in that：It is additionally provided on the barrel of the protrusion and leads to described second
The trepanning of road connection.
10. a kind of application of plunger pump with position limiting structure in urea injection system, the urea injection system is locating
Manage motor exhaust, the urea injection system includes urea tank and nozzle, the plunger pump be connected to the urea tank with
Between the nozzle, the plunger pump to by the urea solution pump in urea tank to the nozzle, it is characterised in that：The column
Plug pump is the plunger pump described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410775074.2A CN105756881B (en) | 2014-12-16 | 2014-12-16 | Plunger pump with position limiting structure and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410775074.2A CN105756881B (en) | 2014-12-16 | 2014-12-16 | Plunger pump with position limiting structure and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105756881A CN105756881A (en) | 2016-07-13 |
| CN105756881B true CN105756881B (en) | 2018-11-06 |
Family
ID=56336670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410775074.2A Active CN105756881B (en) | 2014-12-16 | 2014-12-16 | Plunger pump with position limiting structure and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105756881B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968912A (en) * | 2017-05-11 | 2017-07-21 | 中山市通润塑胶制品有限公司 | A kind of plunger type electromagnetic pump |
| IT201700060837A1 (en) * | 2017-06-05 | 2018-12-05 | Ceme Spa | ELECTROMAGNETIC HYDRAULIC MOTOR PUMP WITH FLOATING PISTON |
| CN112664423B (en) * | 2020-12-25 | 2022-11-15 | 福建省福安市力德泵业有限公司 | Magnetic suspension electromagnetic pump |
| CN113768200A (en) * | 2021-10-22 | 2021-12-10 | 上海烟草集团有限责任公司 | Channel plugging assembly and aerosol generating device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11117858A (en) * | 1997-10-09 | 1999-04-27 | Nippon Control Kogyo Kk | Electromagnetic pump |
| CN101069001A (en) * | 2004-10-13 | 2007-11-07 | 莱奥林奇有限责任公司 | Arrangement for the dosed injection of a reducing medium into the exhaust tract of an internal combustion engine |
| CN102052420A (en) * | 2010-12-22 | 2011-05-11 | 西安交通大学 | Linear compressor with magnetic spring structure |
| CN202176503U (en) * | 2011-08-05 | 2012-03-28 | 邹爱贞 | Electromagnetic water pump capable of changing plunger stroke |
| CN202746135U (en) * | 2012-06-11 | 2013-02-20 | 李东 | Electromagnetic type metering pump |
| CN103362771A (en) * | 2012-04-03 | 2013-10-23 | 托马斯马格尼特股份有限公司 | Reciprocating-piston pump with plain bearing traversed by flow |
-
2014
- 2014-12-16 CN CN201410775074.2A patent/CN105756881B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11117858A (en) * | 1997-10-09 | 1999-04-27 | Nippon Control Kogyo Kk | Electromagnetic pump |
| CN101069001A (en) * | 2004-10-13 | 2007-11-07 | 莱奥林奇有限责任公司 | Arrangement for the dosed injection of a reducing medium into the exhaust tract of an internal combustion engine |
| CN102052420A (en) * | 2010-12-22 | 2011-05-11 | 西安交通大学 | Linear compressor with magnetic spring structure |
| CN202176503U (en) * | 2011-08-05 | 2012-03-28 | 邹爱贞 | Electromagnetic water pump capable of changing plunger stroke |
| CN103362771A (en) * | 2012-04-03 | 2013-10-23 | 托马斯马格尼特股份有限公司 | Reciprocating-piston pump with plain bearing traversed by flow |
| CN202746135U (en) * | 2012-06-11 | 2013-02-20 | 李东 | Electromagnetic type metering pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105756881A (en) | 2016-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105756881B (en) | Plunger pump with position limiting structure and its application | |
| CN104379086B (en) | For distributing the Spring driving pump of the discontinuous eruption of liquid | |
| CN103742383A (en) | Energy storage type supercharged electromagnetic plunger pump and measuring and injecting system used for SCR (Silicon Controlled Rectifier) emission reduction system | |
| CN203730234U (en) | Energy storage type supercharging electromagnetic plunger pump for SCR emission reduction system and metering injection system | |
| CN205297799U (en) | Low -pressure measurement fuel pump | |
| CN204226134U (en) | With the plunger pump of limit structure | |
| CN203412710U (en) | Three-plunger-piston high-pressure pump | |
| CN208330639U (en) | Three plunger type high-pressure plunger pumps | |
| CN202746135U (en) | Electromagnetic type metering pump | |
| CN107596479B (en) | Switching valve and pulse flusher | |
| CN201666238U (en) | Plunger piston type metering spraying pump for emission reduction system | |
| CN102062070B (en) | Plunger type metering ejector pump for emission reduction system | |
| CN101457728B (en) | Ball valve nozzle | |
| CN202832907U (en) | Hand pump of diesel engine fuel filter | |
| CN204226174U (en) | Plunger pump | |
| CN106286201A (en) | A kind of stable high voltage medical pump | |
| CN104314804A (en) | Plunger pump and application thereof | |
| CN104265595A (en) | Plunger pump with limit structure and application of plunger pump | |
| CN205036521U (en) | Pulse coupling pump | |
| CN209162974U (en) | Pulse pump and intelligent closestool | |
| CN212838297U (en) | Non-return body assembly applied to electromagnetic pump and anti-blocking electromagnetic pump | |
| CN212838298U (en) | Anti-blocking electromagnetic pump | |
| CN205190904U (en) | High speed pulse solenoid valve | |
| CN106438264B (en) | A kind of pulse pump | |
| CN218516110U (en) | Toy foam gun |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |