CN2229549Y - Bidirectional operation flexible piston mud pump - Google Patents

Abstract

The utility model relates to a novel single barrel piston mud conveying pump for bidirectional operation, which is characterized in that the mud conveying pump only has two unidirectional valves; both ends of a piston are respectively provided with a flexible piston mutually connected with a cylinder body to insulate conveying medium and the cylinder wall; the piston body, the flexible piston and the valves are mutually matched. The piston can work in any strokes and convey mud material.

Description

Two-way work done flexible plunger liquid feeding pump

The utility model relates to a kind of reciprocating pump of slurry body.

Existing hand piston pump mostly is a shot, can not effectively utilize pump housing volume, and volume is big, heavy, efficient is low.

Chinese patent CN2053255U has proposed the imagination of double-stroke work done, its solution is that a pump divides work two pumps, two pumps are combined into a pump again, concrete structure is an active slider of making two one-stroke reciprocating pumps with piston, merit is utilized the compression stroke of a pump wonderfully, make the diastole stroke of another pump simultaneously by same piston, last two ends with threeway with two pumps advance valve and valve is unified respectively, finish the unification of two pumps.But the valve of this pump still has 4, and piston cylinder directly is the passage of fed sheet of a media, thereby can only infuse, and unlikely defeated slurry, otherwise the solid in the slurry, semi-solid particle can be ground away very soon or be killed meticulous piston and piston cylinder.

The purpose of this utility model provides the reciprocating pump that another kind of casing wall has the two-way work done of having only two valves of protection, uses to make defeated slurry.

This two-way work done flexible plunger liquid feeding pump has the piston/cylinder of garden cylindricality, there are pulp-absorbing pipe and elbow discharge pipe in the cylinder body two ends, a piston body, two one-way valves, it is characterized in that having only the pulp-absorbing pipe end that one-way valve has been installed, there is not valve in the output tube, and be retrofitted in piston body central authorities, the flexible plunger that respectively has a diameter to differ between piston body two ends and pump housing two ends, the guide rod of piston body has two, be installed in both sides, piston body center symmetrically, in the cylinder body left and right sides cavity volume that piston body is separated, respectively have one compressible, the flexible plunger of diastole, oil pocket between flexible plunger and casing wall fills with lubricant oil, push-and-pull guide rod piston body is done straight reciprocating motion, diastole of a compression of two flexible plungers cooperates two one-way valves, can finish two-way work done and carry slurry and do not allow slurry contact the purpose of casing wall.

Accompanying drawing is of the present utility model one principle schematic of implementing, among the figure 1, the pump housing; 2, piston body; 3, guide rod; 4, pull bar; 5, preceding one-way valve; 6, back one-way valve; 7, preceding flexible plunger; 8, back flexible plunger; 9, oil sealing; 10, oil pocket; 11, pulp-absorbing pipe; 12, the defeated pipe of elbow.

Below in conjunction with accompanying drawing the utility model is further described:

With reference to accompanying drawing, this pump has the garden cylindricality pump housing (1), be provided with pulp-absorbing pipe (11) and elbow discharge pipe (12), pulp-absorbing pipe (11) end at pump housing two ends is equipped with that preceding one-way valve (5), piston body (2) central authorities are equipped with back one-way valve (6), respectively there is the hollow flexible plunger piston body (2) both sides: preceding flexible plunger (7), back flexible plunger (8).

When guide rod shown in solid arrow among the figure (3) pulling piston body (2) is mobile from left to right, back flexible plunger (8) compression, slurry is discharged through elbow discharge pipe (12) in the flexible plunger (8) after lastrow Cheng Shu closes back one-way valve (6) promotion of valve, and preceding flexible plunger (7) diastole produces negative pressure, because of back one-way valve (6) closure, institute opens preceding one-way valve (5) so that inhale, slurry is in pulp-absorbing pipe (11) inflow pump, piston body walks to the cylinder body right-hand member, preceding flexible plunger (7) diastole is to maximum, be full of slurry, back flexible plunger (8) is depressed into minimum, one-way valve (5) before this moment, back one-way valve (6) is the decompression closure all, and then piston body is made reverse stroke, back flexible plunger (8) diastole, produce negative pressure, preceding flexible plunger (7) compression, become malleation, two pressures all make back one-way valve (6) open, and the slurry of preceding flexible plunger (7) squeezes the slurry that postpones in the flexible plunger (8) through piston body and discharges.Piston body walks to pump housing left end, and back one-way valve (6) decompression is closed, and next beginning that circulates and so forth, forms certain pressure head and more high-lift slurry stream.

Wherein the diameter of two flexible plungers can not equate, otherwise when piston body moves from right-to-left, only the back one-way valve is opened and is not had slurry and flow, therefore the flexible plunger diameter must be greater than the back flexible plunger before, preceding flexible plunger maximum volume is the twice of back flexible plunger maximum volume preferably, both discharged the slurry of the maximum volume of flexible plunger after when flexible plunger compresses before so just can guaranteeing, also make simultaneously in the flexible plunger of back and be full of slurry, in order to the usefulness of flexible plunger compression output behind the next stroke, simple computation as can be known before preferably the last 1.4 times of flexible plunger of flexible plunger diameters.

Flexible plunger is a bellow-shaped, and vertically the diastole compressibility will be got well, and its stretch rate should be more than the twice of length under the nature, so preferably wear-resisting, endurance, the macromolecular material manufacturing of good springiness, cylinder end is worn the hole of guide rod and is wanted oil sealing, this hole is the piston body pilot hole, also is the oil pocket oil hole.Oil needs only enough lubricated, otherwise can hinder the motion of flexible plunger.

Simple compact, the few easy workout part of this two-way work done flexible plunger pump structure; good maintenance is particularly because there be the protection of flexible plunger to casing wall and piston body; the directly defeated slurry of reciprocating pump had not only been become the suitable life-span may but also be arranged; its hand push-rod can change the outfit into connecting rod; motor-driven from manually changing into, can be applied in the pasty material conveying of solid-liquid mixing.

Claims (4)

1, two-way work done flexible plunger liquid feeding pump, constitute by piston cylinder, guide rod, piston body, two one-way valves, pulp-absorbing pipe and grout outlet, it is characterized in that piston body central authorities are provided with an one-way valve, respectively there is a flexible plunger that links to each other with cylinder end the piston body both sides, and piston body is two guide rods.

2, the described pump of claim 1, it is characterized in that before the flexible plunger diameter greater than the back flexible plunger, the former is 1.4 times of the latter preferably.

3, the described pump of claim 1, it is characterized in that the hollow flexible plunger is a bellow-shaped.

4, claim 1 or 3 described pumps is characterized in that flexible plunger made by the macromolecular material of wear-resisting, endurance, good springiness.

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