CN109424512A - Reciprocating piston pump - Google Patents
Reciprocating piston pump Download PDFInfo
- Publication number
- CN109424512A CN109424512A CN201810997004.XA CN201810997004A CN109424512A CN 109424512 A CN109424512 A CN 109424512A CN 201810997004 A CN201810997004 A CN 201810997004A CN 109424512 A CN109424512 A CN 109424512A
- Authority
- CN
- China
- Prior art keywords
- suction valve
- valve seat
- washer
- cylinder tube
- piston
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 41
- 239000012224 working solution Substances 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims abstract description 8
- 239000000806 elastomer Substances 0.000 claims abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 18
- 239000012535 impurity Substances 0.000 abstract description 9
- 230000002787 reinforcement Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 33
- 238000000034 method Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 19
- 239000002184 metal Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- F04B53/001—Noise damping
-
- 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
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
Abstract
The present invention provides reciprocating piston pump.It is contained the circular groove (21f) for the peripheral side for being held in suction valve seat (21b) and how much the washer (21a) being made of elastomer slipped with cylinder tube (3) inner peripheral surface is worn in the case where being operated using the working solution containing impurity, so, then it is located at the rear side of washer (21a) in suction valve seat (21b) and the valve seat rear portion (21e) between cylinder tube (3) with minim gap (S) is contacted with the inner surface of cylinder tube (3), since suction valve seat (21b) is made of resin, therefore it can hardly cause to damage and inhibit the abrasion of washer (21a) with cylinder tube (3) to cylinder tube (3) contacting, and the suction valve seat (21b) contacted with cylinder tube (3) also restrains its of washer (21a) or more (more than minim gap ) abrasion, to play the role of the reinforcement of washer (21a).
Description
Technical field
The present invention relates to reciprocating piston pumps.
Background technique
Currently, recording the pressure valve type piston pump as reciprocating piston pump in patent document 1 below.Fig. 4 table
Show the summary of the major part for the reciprocating piston pump recorded in patent document 1.As shown in figure 4, in cylindric cylinder tube 50
Inside it is accommodated with the piston rod 51 to move back and forth in the longitudinal direction.In the front end side of piston rod 51, be fixed with have it is multiple
By the disk-shaped retainer 52 of the through-hole 52a of front and back connection.In the front end side compared with piston rod 51, more rear side is fixed with disk-shaped
Suction valve 53.The substantially cylindric washer (packing) 55 of the peripheral side of substantially cylindric suction valve seat 54 is set
It is sliding with the inner peripheral surface of cylinder tube 50.Suction valve seat 54, which is arranged between retainer 52 and suction valve 53 relative to piston rod 51, swims
Unoccupied place insertion.
Herein, the washer 55 slipped with 50 inner peripheral surface of cylinder tube is generally rubber system.Suction valve seat 54, stops suction valve 53
Moving part 52 and cylinder tube 50 are generally made of metal.In addition, washer 55 is generally fused to suction valve seat 54.It will be in suction valve seat 54 1
Body welding there is the component of washer 55 to be known as piston washer 56.
Moreover, the relatively through-hole 52a of retainer 52 is more in the water suction process shown in Fig. 4 that piston rod 51 rearward moves
The part of peripheral side is abutted with the front of suction valve seat 54, and suction valve seat 54 is separated with suction valve 53.Cylinder tube 50 as a result,
Interior flow path is open, and working solution flows to the pump chamber in front as shown by the arrows.On the other hand, it is moved forwards in piston rod 51
Discharge process when, as shown in figure 5, retainer 52 is separated with the front of suction valve seat 54, and suction valve seat 54 and suction valve
53 abut.Flow path closure in cylinder tube 50 as a result, the working solution of pump chamber is pressurized, and the discharge valve being connected with pump chamber is open, spits
Working solution out.Herein, when metal suction valve seat 54 is in order to avoid reciprocating motion with metal 50 inner peripheral surface of cylinder tube
Contact and its outer diameter is smaller than the internal diameter of cylinder tube 50, be provided with enough clearances.
Patent document 1: Japanese Unexamined Patent Publication 11-50970 bulletin
Summary of the invention
But in the case where using the working solution containing fine sand etc. in above-mentioned reciprocating piston pump, it can aggravate in cylinder
The abrasion of the washer 55 slided in pipe 50, the service life of washer 55 shorten.The replacement degree for being noted cylinder washer 56 as a result, is got higher
The problem of.
Especially in recent years, increase to overseas output, such as the water prevented and kill off in Southeast Asia and China etc. is mostly from water channel
It directly absorbs water with river etc., various impurity is contained in the water.Especially service life of the fine sand to washer 55, there are big influences.It is specific and
Speech, as shown in figure 5, the more deposit buildups of the impurity A contained in working solution are in the lower part of cylinder tube 50.If the cleaning after use is not
Sufficiently, then washer 55 (is sandwiched in washer 55 and cylinder with state of the impurity A between washer 55 and cylinder tube 50 when next time uses
State between pipe 50) it moves back and forth.Therefore, the abrasion of washer 55 is dramatically speeded up.
Outer surface of the abrasion of washer 55 on the downside of the diagram of metal suction valve seat 54 and metal cylinder tube 50
Diagram on the downside of inner surface contact at the time of stop.But in this state, on the upside of the diagram of washer 55 with cylinder tube 50
Diagram on the upside of between, due to washer 55 abrasion and generate the space B that cannot ensure the degree of leakproofness, conduct cannot be played
The effect of pump.Moreover, since suction valve seat 54 and cylinder tube 50 are made of metal, so the suction valve seat when washer 55 is worn
54 and cylinder tube 50 can be in contact with each other and be damaged.It is that 50 inner peripheral surface of cylinder tube is damaged as a result, in 50 inner peripheral surface of cylinder tube
The abrasion of the washer 55 of sliding becomes faster.
In addition, suction valve seat 54, suction valve 53, retainer 52 are made of metal, therefore suction valve seat 54 is generated in operation
The impact sound that impact sound, the suction valve seat 54 abutted with suction valve 53 is abutted with retainer 52.These impact sounds are as pump itself
Noise and become problem.
The present invention is to the abrasion for being able to suppress washer and improves the durability of pump and can reduce the impact sound in operating
And it realizes the reciprocating piston pump for reducing noise and is illustrated.
Reciprocating piston pump (100) of the invention, which is characterized in that have: it moves back and forth in cylinder tube (3)
Piston rod (7)；Piston washer (21) has suction valve seat (21b) and washer (21a), and the suction valve seat (21b) is relative to work
It is embedded in stopper rod (7) setting clearance, can move in the axial direction, which is made of elastomer, is contained and is held in
The circular groove (21f) of the peripheral side of suction valve seat (21b) and sliding with cylinder tube (3) inner peripheral surface；Suction valve (20),
Piston rod (7) are fixed on, can be located at abutting on rear side of the axis direction of suction valve seat (21b)；With retainer (22), it is fixed on
Piston rod (7) can have the through-hole (22a) for being connected to front and back, inhale with abutting on front side of the axis direction of piston pad circle (21)
Water valve seat (21b) is made of resin, at the valve seat rear portion of the more position of rear side of the relatively washer (21a) positioned at suction valve seat (21b)
Between the inner peripheral surface of the outer peripheral surface and cylinder tube (3) of (21e), have predetermined minim gap (S).
According to such reciprocating piston pump (100), when being operated using the working solution containing impurity (A), due to
It is piled up in the impurity (A) of the inner surface of cylinder tube (3), how much to be understood in the washer (21a) that the inner peripheral surface of cylinder tube (3) slides
Abrasion.It is located at the rear side of washer (21a) in suction valve seat (21b) as a result, and there is minim gap between cylinder tube (3)
(S) valve seat rear portion (21e) is contacted with the inner surface of cylinder tube (3).Since suction valve seat (21b) is made of resin, so i.e.
Make to contact also can hardly inhibit washer (21a) to cylinder tube (3) abrasion with causing damage with cylinder tube (3).Further more, with
The suction valve seat (21b) of cylinder tube (3) contact restrains the abrasion of its above (more than the minim gap amount) of washer (21a), plays
The effect of the reinforcement of washer (21a).In this state, washer (21a) can be in utilization operating pressure fully to cylinder tube (3)
Ensure to extend in the state of leakproofness.In the state that reciprocating piston pump (100) is able to carry out and ensures longer time pressure as a result,
Operating.That is, reciprocating piston pump (100) is able to suppress the abrasion of washer (21a) and improves the durability of pump.In addition, water suction
Valve seat (21b) is made of resin, and suction valve (20) and retainer (22) are generally made of metal.Therefore, reciprocating piston pump (100)
It can reduce the impact sound, suction valve seat (21b) and retainer (22) that suction valve seat (21b) is abutted with suction valve (20) in operating
The impact sound of abutting, can be realized reduction noise.
Herein, the outer peripheral edge portion of the rear end of washer (21a) can also be provided with recessed portion (21g), the recessed portion
(21g) is to axis direction front side and inside is recessed, and the front surface towards valve seat rear portion (21e), the flowing in cylinder tube (3)
Working solution be able to enter the recessed portion (21g).In this case, using the working solution for entering recessed portion (21g), from rear portion
Washer (21a) is supplied in terms of cooling and lubrication.Reciprocating piston pump (100) can be realized washer (21a) as a result,
Long lifetime and can be improved the durability of pump.
In addition it is also possible to be annularly to be provided with rearward protrusion outstanding in the rear end face of suction valve seat (21b)
(21h), the outer diameter of protrusion (21h) structure smaller than the outer diameter of suction valve (20).In this case, it absorbs water in discharge process
When valve (20) presses piston washer (21) under pressurised conditions, the peripheral part edge part (20a) of suction valve (20) is not touched directly
It is abutted to suction valve seat (21b) with protrusion (21h).Thus inhibit the deformation of suction valve seat (21b).Therefore, reciprocating piston
Pump (100) can ensure the service life of the suction valve seat (21b) of resin and improve the durability of pump.
In addition, piston washer (21) may be the structure that washer (21a) is assembled into suction valve seat (21b).This
In the case of, in the case where washer (21a) abrasion, suction valve seat (21b) keeps intact and only replaces washer (21a), from
But economical.
In this way, in accordance with the invention it is possible to provide the durability for being able to suppress the abrasion of washer and improving pump, and can drop
Impact sound in low operating and realize the reciprocating piston pump for reducing noise.
Detailed description of the invention
Fig. 1 is the longitudinal section for indicating reciprocating piston pump involved in embodiment.
The action specification figure of major part when Fig. 2 is the water suction process of reciprocating piston shown in FIG. 1.
The action specification figure of major part when Fig. 3 is the discharge process of reciprocating piston shown in FIG. 1.
Fig. 4 indicates the structure of the major part of the reciprocating piston of the prior art, is action specification figure when absorbing water process.
The explanatory diagram for the problem of Fig. 5 is the reciprocating piston for pointing out the prior art.
Specific embodiment
Hereinafter, being illustrated referring to attached drawing to the embodiment of reciprocating piston pump of the invention.Fig. 1 is to indicate to implement
The longitudinal section of reciprocating piston pump involved in mode.Major part when Fig. 2 is the water suction process of reciprocating piston pump
Action specification figure.The action specification figure of major part when Fig. 3 is the discharge process of reciprocating piston.Present embodiment it is reciprocal
Formula piston pump for example applied to power sprayer etc. in the equipment of representative.The reciprocating piston pump of present embodiment is for example also
Referred to as single current piston pump or pressure valve type piston pump.In addition, making depending on the application as the working solution for reciprocating piston pump
With various liquid.
As shown in Figure 1, reciprocating piston pump 100 includes crankcase 1, water suction side manifold 2, cylinder tube 3 and exhaust end manifold
4.Crankcase 1, water suction side manifold 2, cylinder tube 3 and exhaust end manifold 4 substantially link from diagram right side in the order to the left.?
The inside of crankcase 1 is configured with crankshaft 5, connecting rod 6.Piston rod 7 is being configured with from crankcase 1 throughout the inside of cylinder tube 3.Piston
Bar 7 links via connecting rod 6 with crankshaft 5.Then, the dynamic rotation from the external input such as engine or motor is utilized
Crankshaft 5 is driven, via connecting rod 6, piston rod 7 moves back and forth in cylinder tube 3.
In addition, the upper portion of center line C indicates the discharge process that piston rod 7 is advanced by the rotation of crankshaft 5 in Fig. 1
In be located at top dead-centre state.The lower portion of center line C indicates the suction that piston rod 7 is retreated by the rotation of crankshaft 5 in Fig. 1
It is located at the state of bottom dead centre in water conservancy project sequence.
Lubricating oil is filled in crankcase 1.In the position that piston rod 7 passes through, it is provided with sliding with the piston rod 7 and uses
In the oil sealing 8 for preventing the lubricating oil in crankcase 1 from leaking to water suction 2 side of side manifold.In addition, being provided in water suction side manifold 2
Seal washer 9 sliding with piston rod 7 and for preventing leakage of the working solution of water suction 2 side of side manifold to 8 side of oil sealing.In addition,
It is provided in water suction side manifold 2 for working solution to be drawn into internal water sucking mouth 15.
In cylinder tube 3, it is provided with the water suction valve system 11 to move back and forth in the axial direction together with piston rod 7
(details are following).Valve system 11 absorb water in the flow path by moving back and forth the pump chamber 10 that the opposite front end side in cylinder tube 3 is formed
Pump chamber 10 pressurize/depressurize by pumping action while being opened and closed.
In addition, being provided with discharge valve 12 in the front end of pump chamber 10, the discharge valve 12 is with benefit in exhaust end manifold 4
With pressurization/decompression of the pump chamber 10 of the pumping action of water suction valve system 11, flow path is opened and closed, by opening by pump chamber 10
Interior working solution is to outdoor discharge.In addition, being provided with the pressure to the working solution to spue by pumping action in exhaust end manifold 4
The pressure regulator valve 13 being adjusted, and it is provided with the air chamber buffered to the pulsation of the working solution to spue by pumping action
14。
As shown in Fig. 2, water suction valve system 11 includes suction valve 20, piston washer 21 and retainer 22 as main body, and
It is further equipped with ring flange 23, gasket 24 and nut 25, wherein piston washer 21 includes slipping with the inner peripheral surface of cylinder tube 3
Washer 21a and suction valve seat 21b.
Suction valve 20 is the plectane for having the through hole for passing through piston rod 7 in center.Ring flange 23 is in center
Have the cylinder of the through hole for passing through piston rod 7, it is sufficiently long in a thickness direction compared with suction valve seat 21b.
Retainer 22 is the plectane for having the through hole for passing through piston rod 7 in center.In the retainer 22, along week
To be disposed separately it is multiple in the longitudinal direction perforation and by front and back be connected to through-hole 22a.
Then, in piston rod 7, from the base end side (diagram right side) of piston rod 7, suction valve 20, ring flange 23, retainer
22, gasket 24 is embedded into the order.Nut 25 is installed in the pin thread 7a for being formed in the front end of piston rod 7, by tightening
Nut 25, suction valve 20 and the stage portion 7b phase of the major diameter formed in piston rod 7 are run into.These components 20,22,23,24 as a result,
It is clamped and fastened between stage portion 7b and nut 25.
Piston washer 21 is configured to substantially cylindric.Piston washer 21 includes washer 21a and the suction valve for keeping washer 21a
Seat 21b.Piston washer 21 passes through ring flange 23 on the position between suction valve 20 and retainer 22, in inside.
Washer 21a is the cricoid elastomer with substantially rectangular cross-section, herein, by the rubber material as chemical resistance
The fluorubber of material is constituted.
Suction valve seat 21b is made of resin, herein, such as is made of polyethylene.Suction valve seat 21b includes: substantially cylinder
The main part 21c of shape；The front end of main part 21c is set, is in substantially circular flange shape front side outstanding to radial outside
Protrusion 21d；It is in substantially circular flange shape rear side protrusion outstanding to radial outside with the rear end that main part 21c is arranged in
21e.Groove 21f is marked by these front sides protrusion 21d, main part 21c, rear side protrusion 21e.The front side protrusion of suction valve seat 21b
The outer diameter of 21d is smaller than the outer diameter of rear side protrusion 21e, and roughly same outer diameter with retainer 22.
Washer 21a is pressed into the groove 21f of suction valve seat 21b, is kept with the state being accommodated in groove 21f.Pad
Circle 21a with the inner peripheral surface of its outer peripheral surface and cylinder tube 3 is sliding and the front of washer 21a be sandwiched in the inner peripheral surface of cylinder tube 3 with
Mode between the front side protrusion 21d of suction valve seat 21b configures.
Valve seat rear portion positioned at the more position of rear side relatively washer 21a of suction valve seat 21b is rear side protrusion 21e.After this
Between the outer peripheral surface of side protrusion 21e and the inner peripheral surface of cylinder tube 3, it is provided with predetermined minim gap S.Herein, small
Gap S is particularly preferably set as 0.05~0.1mm or so.
In addition, the outer peripheral edge portion in the rear end of washer 21a, annular in shape to be provided with recessed portion 21g, recessed portion 21g
On front side of to axis direction and inside is recessed, and the front surface in face of the peripheral side of the rear side protrusion 21e of suction valve seat 21b.?
The working solution flowed in cylinder tube 3 can enter recessed portion 21g via above-mentioned minim gap S.
In addition, the rear end face of the rear side protrusion 21e in suction valve seat 21b, is separating inwardly (center axis) from outer peripheral surface
Position, be provided with protrusion 21h rearward outstanding annular in shape.The outer diameter of protrusion 21h is smaller than the outer diameter of suction valve 20.
Then, annulus is formed between the inner peripheral surface of the suction valve seat 21b of piston washer 21 and the outer peripheral surface of ring flange 23
The clearance C 1 of shape.Piston washer 21 is embedded in clearance is arranged relative to the ring flange 23 between suction valve 20 and retainer 22, energy
It is enough to move in the axial direction.
In the water suction valve system 11 having a structure in which, as shown in Figures 2 and 3, the inner circumferential of washer 21a and cylinder tube 3
Face is sliding.The outer peripheral surface of retainer 22 is located near the inner peripheral surface of cylinder tube 3.Suction valve seat 21b rear side protrusion 21e it is outer
Minim gap S is provided between circumferential surface and the inner peripheral surface of cylinder tube 3.In addition, the rear end face of the peripheral part of retainer 22 be in
The opposite positional relationship of the front surface of the front side protrusion 21d of suction valve seat 21b.Then, as shown in Fig. 2, in the outer of retainer 22
When the rear end face of circumference is abutted with the front surface of the front side protrusion 21d of suction valve seat 21b, between suction valve 20 and protrusion 21h
Form circular clearance C 2.
Such reciprocating piston pump 100 piston rod 7 when rotation drives crankshaft 5 moves back and forth in cylinder tube 3,
Repeat from top dead-centre to the mobile water suction process of bottom dead centre (referring to Fig. 2) and from bottom dead centre to the discharge work of top dead-centre movement
Sequence (referring to Fig. 3).
Herein, when being switched to water suction process from discharge process, as shown in the lower portion of the center line C of Fig. 1, piston rod
7 is mobile to axis direction rear, as shown in Fig. 2, suction valve 20 is separated from protrusion 21h to axis direction, retainer 22 and water suction
The front side protrusion 21d of valve seat 21b is abutted.
In addition, being separated by suction valve 20 from protrusion 21h to axis direction, and produced between suction valve 20 and protrusion 21h
Raw clearance C 2, flow path are open.Clearance C 2 is connected to clearance C 1 as a result, and is further connected to through-hole 22a.Then, from water suction side discrimination
The working solution that the water sucking mouth 15 (referring to Fig.1) of pipe 2 flows into flows into clearance C 1 by clearance C 2.
Then, and piston rod 7 maintain gap between the suction valve 20 and protrusion 21h mobile to axis direction rear together
In the state that the inner peripheral surface of C2 and washer 21a and cylinder tube 3 are sliding, suction valve seat 21b quilt and piston rod 7 are together to axis direction
The mobile retainer 22 in rear drives, and piston washer 21 is mobile to axis direction rear.
In pump chamber 10, due to the movement to axis direction rear of piston rod 7, volume increases and is depressurized, from forming
For negative pressure.The working solution for flowing into clearance C 1 is attracted by through-hole 22a and flows into pump chamber 10.
In addition, when moving to discharge process from water suction process, as shown in the upper portion of the center line C of Fig. 1, piston rod 7
It is mobile in front of to axis direction, as shown in figure 3, retainer 22 is separated with the front side protrusion 21d of suction valve seat 21b, suction valve 20
It is abutted with protrusion 21h, clearance C 2 disappears, flow path closure.
Then, maintain and piston rod 7 together to the suction valve 20 and protrusion 21h that move in front of axis direction abutting and
In the state that the inner peripheral surface of washer 21a and cylinder tube 3 is sliding, suction valve seat 21b quilt and piston rod 7 are together to axis direction front
Mobile suction valve 20 drives, and piston washer 21 is mobile to axis direction front.
In pump chamber 10, as shown in Figure 1, being pressurized, discharge valve to the movement in front of axis direction due to piston rod 7
12 is open.Working solution in pump chamber 10 spues via discharge valve 12 from the discharge opening of exhaust end manifold 4 16 to outside.Then,
Repeat above-mentioned water suction process, discharge process.
Herein, as shown in figure 3, impurity A is deposited in the interior table of cylinder tube 3 in operation when containing impurity A in working solution
Face lower part.Due to the impurity A, how much can be worn in the washer 21a that the inner peripheral surface of cylinder tube 3 slides.In this way, then in this reality
It applies in mode, after the valve seat in suction valve seat 21b positioned at the rear side of washer 21a and between cylinder tube 3 with minim gap S
Portion is that rear side protrusion 21e is contacted with the inner surface of cylinder tube 3.Herein, it is made of due to suction valve seat 21b resin, so even if
Also can hardly inhibit washer 21a to cylinder tube 3 abrasion with causing damage is contacted with cylinder tube 3.Further more, with cylinder tube 3
The suction valve seat 21b of contact restrains the abrasion of its above (more than the minim gap amount) of washer 21a, plays the reinforcement of washer 21a
(backup) effect.In this state, washer 21a can by operating pressure fully ensured relative to cylinder tube 3 it is close
It is extended in the state of envelope property.Reciprocating piston pump (100) can be realized the fortune in the state of ensuring longer time pressure as a result,
Turn.That is, being able to suppress the abrasion of washer 21a and improving the durability of pump.In addition, suction valve seat 21b is made of resin, suction valve
20 and retainer 22 be made of metal.Therefore, reciprocating piston pump 100 can reduce suction valve seat 21b and suction valve in operation
The impact sound that 20 impact sound, the suction valve seat 21b abutted are abutted with retainer 22, can be realized reduction noise.
In addition, according to the present embodiment, the outer peripheral edge portion in the rear end of washer 21a is provided with recessed portion 21g, the recess
Portion 21g is to axis direction front side and inside is recessed, and in face of the front surface of the rear side protrusion 21e as valve seat rear portion, in gas
The working solution flowed in earthen pipe 3 is able to enter recessed portion 21g.Therefore, using the working solution for entering recessed portion 21g, from rear portion
Washer 21a is supplied in terms of cooling and lubrication.Reciprocating piston pump 100 can be realized the long-life of washer 21a as a result,
Change and can be improved the durability of pump.
In addition, it is annularly provided with rearward protrusion 21h outstanding in the rear end face of suction valve seat 21b, protrusion 21h's
Outer diameter is smaller than the outer diameter of suction valve 20.Therefore, when discharge process shown in Fig. 3, when suction valve 20 presses under pressurised conditions
When piston washer 21, the peripheral part edge part 20a of suction valve 20 does not touch suction valve seat 21b directly and abuts with protrusion 21h.
As a result, the deformation of suction valve seat 21b is suppressed.Reciprocating piston pump 100 can ensure the suction valve seat of resin as a result,
The service life of 21b and the durability for improving pump.In addition, it is shown in Fig. 5 in the prior art, in discharge process, when suction valve 53
When pressing piston washer 56 under pressurised conditions, the peripheral part edge part 53a of suction valve 53 is directly abutted with suction valve seat 54.Cause
This, when the suction valve seat 54 is made of resin, suction valve seat easily deforms and is difficult to realize the high life.
In addition, according to the present embodiment, piston washer 21 is the structure that washer 21a is assembled in suction valve seat 21b.Cause
This, in the case where washer 21a abrasion, suction valve seat 21b keeps intact and only replaces washer 21a, to be economical.
In addition, when using clear water, if suction valve seat, suction valve, retainer are made of metal and are made of same material,
Then same material is against each other in operation, therefore there is the case where generating mutually attached phenomenon.But in present embodiment
In, since suction valve seat 21b is made of resin, thus same material is not against each other, is able to suppress attaching phenomenon.
More than, the present invention is illustrated based on embodiments thereof, but the present invention is not limited to above-mentioned implementations
Mode.For example, in the above-described embodiment, using the retainer 22 when absorbing water process and the front as suction valve seat 21b
The type that front side protrusion 21d is abutted, but for example can also apply to that as recorded in Japanese Unexamined Patent Publication 2014-224469 bulletin
The type that the protruding portion at sample, retainer rear portion is abutted with the front of washer.
In addition, washer is particularly preferably set as rubber, but as long as being elastomer.
In addition, in the above-described embodiment, being sprayed to by reciprocating piston pump applied to power as more preferred example
The example of day with fog is illustrated, but can also apply equally to caused by the generation of air pocket caused by worrying clear water, impact sound
The mist formula refrigeration equipment of noise, reciprocating piston pump of atomization etc..
3 ... cylinder tubes, 7 ... piston rods, 20 ... suction valves, 21 ... piston washers, 21a ... washer, 21b ... suction valve seat,
21e ... rear side protrusion (valve seat rear portion), 21f ... groove, 21g ... recessed portion, the protrusion 21h ..., 22 ... retainers, 22a ... through-hole,
100 ... reciprocating piston pumps, S ... minim gap.
Claims (4)
1. a kind of reciprocating piston pump (100), which is characterized in that
Have: piston rod (7) moves back and forth in cylinder tube (3)；Piston washer (21), has suction valve seat
(21b) and washer (21a), the suction valve seat (21b) are embedded in relative to the piston rod (7) setting clearance and can be in axis
Line moves on direction, and the washer (21a) is contained the circular groove for the peripheral side for being held in the suction valve seat (21b)
It (21f) and slips with the cylinder tube (3) inner peripheral surface and is made of elastomer；Suction valve (20), is fixed in the work
Stopper rod (7), and can be with abutting on rear side of the axis direction of the suction valve seat (21b)；With retainer (22), it is fixed in
The piston rod (7), and can be with abutting on front side of the axis direction of the piston washer (21), and have and be connected to front and back
Through-hole (22a),
The suction valve seat (21b) is made of resin,
In the periphery at the more valve seat rear portion (21e) of the position of rear side of the washer (21a) positioned at the suction valve seat (21b)
Between face and the inner peripheral surface of the cylinder tube (3), have predetermined minim gap (S).
2. reciprocating piston pump (100) as described in claim 1, which is characterized in that
Outer peripheral edge portion in the rear end of the washer (21a) is provided with recessed portion (21g), and the recessed portion (21g) is to axis
On front side of direction and inside is recessed, and the front surface towards the valve seat rear portion (21e), flows in the cylinder tube (3)
Working solution is able to enter the recessed portion (21g).
3. reciprocating piston pump (100) as claimed in claim 1 or 2, which is characterized in that
In the rear end face of the suction valve seat (21b), it is annularly provided with rearward protrusion (21h) outstanding,
The outer diameter of the protrusion (21h) is smaller than the outer diameter of the suction valve (20).
4. the reciprocating piston pump (100) as described in any one of claims 1 to 3, which is characterized in that
The piston washer (21) is the structure that the washer (21a) is assembled into the suction valve seat (21b).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017165268A JP6850702B2 (en) | 2017-08-30 | 2017-08-30 | Reciprocating piston pump |
| JP2017-165268 | 2017-08-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109424512A true CN109424512A (en) | 2019-03-05 |
| CN109424512B CN109424512B (en) | 2020-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810997004.XA Active CN109424512B (en) | 2017-08-30 | 2018-08-29 | Reciprocating piston pump |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6850702B2 (en) |
| CN (1) | CN109424512B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594147B (en) * | 2019-09-20 | 2020-12-22 | 孙庆伟 | Plunger pump for oil field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201425022Y (en) * | 2009-05-08 | 2010-03-17 | 淄博华创精细陶瓷有限公司 | Novel slurry pump piston |
| CN201916178U (en) * | 2010-12-22 | 2011-08-03 | 苏州黑猫(集团)有限公司 | Water return device of piston pump |
| CN102808885A (en) * | 2011-05-31 | 2012-12-05 | 日立汽车系统株式会社 | Cylinder device |
| JP2014224469A (en) * | 2013-05-15 | 2014-12-04 | 株式会社丸山製作所 | Forced valve type piston pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3920356A (en) * | 1973-04-02 | 1975-11-18 | Cat Pumps Corp | Reciprocating pump |
| IT1114876B (en) * | 1976-06-28 | 1986-01-27 | Speck Kolbenpumpen Fabrik | CYLINDER-PISTON ARRANGEMENT FOR A LIQUID PUMP |
| JPS6034576U (en) * | 1983-08-17 | 1985-03-09 | 浦 清純 | piston pump |
| JPH0741135U (en) * | 1993-12-28 | 1995-07-21 | エヌオーケー株式会社 | Synthetic resin piston |
| JP3500595B2 (en) * | 1997-07-30 | 2004-02-23 | 株式会社丸山製作所 | Forced valve piston pump |
| JP4913770B2 (en) * | 2008-04-01 | 2012-04-11 | 株式会社丸山製作所 | Forced valve type piston pump |
-
2017
- 2017-08-30 JP JP2017165268A patent/JP6850702B2/en active Active
-
2018
- 2018-08-29 CN CN201810997004.XA patent/CN109424512B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201425022Y (en) * | 2009-05-08 | 2010-03-17 | 淄博华创精细陶瓷有限公司 | Novel slurry pump piston |
| CN201916178U (en) * | 2010-12-22 | 2011-08-03 | 苏州黑猫(集团)有限公司 | Water return device of piston pump |
| CN102808885A (en) * | 2011-05-31 | 2012-12-05 | 日立汽车系统株式会社 | Cylinder device |
| JP2014224469A (en) * | 2013-05-15 | 2014-12-04 | 株式会社丸山製作所 | Forced valve type piston pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109424512B (en) | 2020-02-18 |
| JP2019044605A (en) | 2019-03-22 |
| JP6850702B2 (en) | 2021-03-31 |
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