CN201513310U

CN201513310U - Reciprocating piston pump

Info

Publication number: CN201513310U
Application number: CN2009202190700U
Authority: CN
Inventors: 周彧; 冀宏; 张玲珑
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-14
Filing date: 2009-10-14
Publication date: 2010-06-23
Anticipated expiration: 2019-10-14

Abstract

The utility model relates to a water pump with a reciprocating piston. In the utility model, the reciprocating piston is equipped with a valve body which is arranged at the middle of a cylinder with a straight tube structure and divides a pump chamber into a front pump chamber and a back pump chamber, a through hole for placing a piston shaft is formed along the cylinder axis on the valve body; two pistons fixed on the same shaft are respectively arranged in the front and the back pump chambers, two ends of the piston shaft respectively extend out of two ends of the cylinder, the middle section of the piston shaft is in movable fit with the through hole formed on valve body and used for placing the piston shaft, devices matched with a hydraulic actuator are respectively arranged at the two ends of the piston shaft, a one-way valve for communication is arranged on the valve body, and the hydraulic actuator for driving the reciprocating piston pump to move is a hydraulic piston.

Description

A kind of reciprocating piston pump

Technical field

The utility model relate to a kind of basically can liquid without interruption, have the water pump of reciprocating piston.Pump of the present utility model is made of cylinder barrel, piston, the one-way valve that is arranged on water intake and the water outlet respectively,

Background technique

For the reciprocating pump that makes intermittent water application is realized continuous water supply basically, be by the piston two ends being arranged to the technological scheme of two pump chambers respectively on prior art, the piston of this pump is when a direction motion, a pump chamber volume compression is outwards supplied water, the then volumetric expansion suction of another pump chamber so realizes continuous basically water supply.

Chinese invention patent application 86106337 disclosed pump with dual pistons fitted with valves are one-way valves that similar valve is set respectively on two pistons, work as a Piston Compression job at the end like this, the another piston has been filled water, the piston that is filled water when piston reverses direction is moved compresses draining, the operation that then absorbs water of another piston, so alternation.This technology is owing to structural reason, and its working pressure is restricted, and functional reliability is also relatively poor.

Chinese invention patent application 87106319 disclosed reciprocating type cylinder and two chambers multifunctional ceiling press pumps are that two cover feed liquor and fluid one-way valves are set respectively at the piston two ends, this structure estimates partly to overcome the deficiency of aforementioned patent, but its physical dimension is bigger, the reliability of work is not high yet, and also is easy to cause the resonance of system pipeline when work.In addition, because this technology is that this can influence the piston easy motion by the to-and-fro motion of crank mechanism driven plunger.

In some comparatively special applications, as be applied in the reverse osmosis seawater desalination system, need be with the elevated pressures pump is arranged, now many uses is multistage centrifugal pump and mechanical bent axle reciprocating pump, but all there are problems such as output flow is not steady, pressure surge is big in they, cause the desalination film in the system to damage easily; Be difficult to realize soft start and soft stopping in addition, with and the deficiency of structure itself, cause the whole system vibrations strongly and noise big.More external companies have developed the high pressure sea water pump of some better performances, but its structure more complicated, price are very expensive.

Summary of the invention

The purpose of this utility model is at defective of the prior art, and a kind of high pressure reciprocating pump that has is provided, can liquid without interruption basically, and reliability height, the comparatively simple and direct reciprocating piston pump of structure simultaneously.

Reciprocating piston pump of the present utility model is to be provided with the valve body that pump chamber is divided into former and later two part pump chambers at 1/2nd places of the cylinder barrel of straight tube structure, cylinder barrel axis place, valve body upper edge offers the through hole that is used to be provided with piston shaft, be respectively arranged with two pistons that are fixed on the same axle in former and later two pump chambers, the two ends of cylinder barrel are stretched out at the two ends of piston shaft respectively, the through hole that set being used to is provided with piston shaft on the stage casing of piston shaft and the valve body movingly, and be respectively equipped with the device that matches with fluid pressure drive device at the two ends of piston shaft, each offers the passage that communicates with one-way valve on water outlet and the water intake respectively towards two pump chamber sides at valve body, and described one-way valve is arranged on the valve body.The fluid pressure drive device that drives reciprocating piston pump motion of the present utility model is a hydraulic piston.

In the preferred structure of the present utility model, be respectively arranged with pressure compensation channel at the cylinder barrel two ends of pump.

Because the utility model adopts the reciprocating motion of the pistons of hydraulic piston driven pump, so there is not steady, the unbalanced deficiency of POF of piston motion in the prior art in the utility model; And because of the utility model be that one-way valve is arranged on the valve body that is positioned at cylinder barrel middle part, make its mechanism comparatively simple and direct, make that also the pipe arrangement of related system is comparatively simple, the mechanism size that can overcome the prior art existence simultaneously is excessive, easily the deficiency of the system pipeline resonance phenomenon that produces.Because valve body also can play the effect of piston shaft motion guide location in the utility model, therefore the utility model goes for the structure of long stroke or overlength stroke piston, and prior art can influence proper motion because of pressurized unstability in the major axis work when being used for the piston of overlength stroke.

If the utility model is respectively arranged with pressure compensation channel at the cylinder barrel two ends of pump, go back the utilisation system working liquid body and carry out pressure compensation, isobaric further to reduce until realizing fully, etc. the flow operation.

Description of drawings

Accompanying drawing 1 is a simplified schematic representation of the present utility model;

Accompanying drawing 2 is longitudinal profile schematic representation of the utility model structure;

Accompanying drawing 3 is an one-way valve partial enlarged drawing of the present utility model;

Accompanying drawing 4 is section rotation schematic representation of C-C position among Fig. 2.

In the accompanying drawing: 1 is reciprocating piston pump of the present utility model, 2a is the first fluid one-way valve, 2b is the second fluid one-way valve, 3 is cylinder barrel, and 4 is that 5a was the first feed liquor one-way valve by the oil hydraulic cylinder of oil hydraulic motor support performance the oil hydraulic cylinder of hydraulic drive system drives (both by), 5b is the second feed liquor one-way valve, 6 is the reciprocating piston axle, and 7 is hydraulic cylinder piston rod, and 8 is cylinder barrel end cap of the present utility model, 9 is piston, 10 are cylinder barrel of the present utility model (being 3 among Fig. 1), and 11 is valve body, and 12 is the valve gap of one-way valve, 13 is the spring of one-way valve, 14 is the valve core of one-way valve, and 15 is one-way valve, and 16 is pressure compensation channel.P is a liquid outlet, and T is a liquid entering hole, and L and R are respectively the hydraulic medium outlet, and A and B are respectively advancing of hydraulic driving system and oil outlet.

Embodiment

The utility model describes in detail below in conjunction with accompanying drawing:

As shown in Figure 1, reciprocating piston pump 1 of the present utility model is provided with liquid outlet P and the liquid entering hole T that links to each other with cylinder barrel 3.Hydraulic fluid port A and B, drain tap L and R that oil hydraulic cylinder 4 links to each other, the outlet of one-way valve 2 links to each other with P, the import of one-way valve 2 links to each other with cylinder barrel 3, the import of one-way valve 5 links to each other with T, the outlet of one-way valve 5 links to each other with cylinder barrel 3, C on the oil hydraulic cylinder of two ends (A), B hydraulic fluid port connect respectively pumping plant into and out of hydraulic fluid port, piston shaft 6 links to each other with hydraulic cylinder piston rod 7.

Concrete structure of the present utility model is referring to accompanying drawing 2, wherein: be provided with end cap 8 at the two ends of cylinder barrel 10, the middle part of cylinder barrel 10, just along 1/2nd places of cylinder barrel axis be provided with whole cylinder barrel can be divided into about the valve body 11 of two pump chambers.At valve body 11 left ends, promptly the right-hand member of left pump chamber is provided with passage Pa and passage Ta, valve body 11 right-hand members, and promptly the left end of right pump chamber is provided with passage Pb and passage Tb.Passage Pa and Pb are communicated with the inlet of one-way valve 15Pa (2a) and 15Pb (2b) respectively, and the outlet of one-way valve 15Pa (2a) and 15Pb (2b) all is communicated with liquid outlet P; Passage Ta and Tb are communicated with the outlet of one-way valve 15Ta (5a) and 15Tb (5b) respectively, and the import of one-way valve 15Ta (5a) and 15Tb (5b) all is communicated with liquid entering hole T, and referring to accompanying drawing 4, one-way valve 15 is referring to accompanying drawing 3.The centre of valve body 11 promptly is positioned at cylinder barrel axis place and offers through hole, is combined with piston shaft 6 in it.Be fixed with left piston 9a that is positioned at left pump chamber and the right piston 9b that is positioned at right pump chamber on the piston shaft 6 respectively; The hole that the two ends of piston shaft 6 are provided with cylinder barrel end cap 8 middle parts respectively movingly.And stretch out at the two ends of piston shaft 6 on the part of end cap 8 and be respectively equipped with the device that matches with fluid pressure drive device, this device can be the axle (as shown) that matches with the hole of hydraulic cylinder piston rod 7 ends, also can be can with the fixing flange in piston rod 7 ends, etc.

Be also shown in by Fig. 2, on end cap, also offer pressure compensation channel 16, the highly pressurised liquid in the work system can be introduced in the utility model, realize the pressure compensation in the operation by this passage.

Working procedure of the present utility model is: at first, give oil hydraulic cylinder 4 by the hydraulic power unit fuel feeding, make oil hydraulic cylinder 4 energy automatic reciprocating motions by hydraulic pressure automatic reverse technology; Hydraulic cylinder piston rod 7 acts on piston shaft 6, makes the piston 9 that is positioned at each pump chamber of cylinder barrel do straight reciprocating motion.When hydraulic cylinder piston rod 7 when right-hand member moves, the liquid of cylinder barrel left side pump chamber is squeezed, pressure raises and import one-way valve 15Ta (5a) is closed, one-way valve 15Pa (2a) is opened, liquid is released by left piston, enter output tube P via one-way valve 15Pa (2a), this working procedure is the discharge process of left pump chamber; Simultaneously, the piston of right pump chamber moves to make and forms negative pressure in the cylinder, one-way valve P15b (2b) is closed, and pending liquid backs down one-way valve 15Tb (5b) under the effect of liquid level atmosphere, liquid is entered in the right pump chamber of cylinder barrel 10, till piston shaft 6 moved to farthest right position, this working procedure was the suction process of right pump chamber.After piston shaft 6 moves on to farthest right position, make piston shaft 6 begin to be moved to the left after the fluid pressure drive device automatic reverse, so repeatedly, realize operation.

Claims

1. reciprocating piston pump, by cylinder barrel, piston, the one-way valve that is arranged at respectively on water intake and the water outlet constitutes, it is characterized in that being provided with the valve body that pump chamber is divided into former and later two part pump chambers at 1/2nd places of the cylinder barrel of straight tube structure, cylinder barrel axis place, valve body upper edge offers the through hole that is used to be provided with piston shaft, be respectively arranged with two pistons that are fixed on the same axle in former and later two pump chambers, the two ends of cylinder barrel are stretched out at the two ends of piston shaft respectively, the through hole that set being used to is provided with piston shaft on the stage casing of piston shaft and the valve body movingly, and be respectively equipped with the device that matches with fluid pressure drive device at the two ends of piston shaft, each offers the passage that communicates with one-way valve on water outlet and the water intake respectively towards two pump chamber sides at valve body, one-way valve is arranged on the valve body, and the fluid pressure drive device that drives reciprocating piston pump motion of the present invention is a hydraulic piston.

2. reciprocating piston pump according to claim 1 is characterized in that being respectively arranged with pressure compensation channel at the cylinder barrel two ends.