CN2091970U

CN2091970U - Corrugated pipe pump with convex ring

Info

Publication number: CN2091970U
Application number: CN 91215057
Authority: CN
Inventors: 曹吉祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-01-21
Filing date: 1991-01-21
Publication date: 1992-01-01

Abstract

The utility model provides a pump depending on the volume change to generate the sucking and discharging actions and a convex ring wave pipe is used as a working critical component of the pump. The outer side of every wave of the wave pipe is provided with a convex ring with a cross surface being in a square or trapezium and the convex ring and the wave pipe are integrally made of plastic or rubber material. Under the driving of a driving mechanism, the convex ring wave pipe makes the telescopic motion and the function of pumping the liquid body is achieved by using the volume changing in the pipe. Because of the structural feature of the pump, the pump still can maintain the liquid body not being leaked after the pump runs for a long time and is suitable for conveying the corrosive liquid body and toxic liquid body such as the chemistry, the metallurgy, etc.

Description

Corrugated pipe pump with convex ring

The utility model relates to a kind of various soda acids and leak free pump of chemical corrosivity fluid carried.

In existing technology, utility application 88217571.8 hermetically sealed bellowspumps, utilize cam or bent axle transmission to make the bellows dilatation, forming the bellows internal volume changes, convection cell produces pump-absorb action, in order to make bellows be easy to dilatation and good bending fatigue resistance energy, the tube wall of bellows must be done very thinly, but the light wall pipe bellows can't bear higher hydrodynamic pressure, therefore, for solving this contradiction, the key technology that is adopted is outside each road ripple of bellows, puts the internal surface corrugated metal stiffening ring identical with the bellows waveform one in hermetically sealed bellowspump.It is the clamping rings that is become with screw attachment with hasp by two halfbodies, and this ring can easy on and off moves along with the bellows distortion.Hydrodynamic pressure in the bellows is then all supported by the metal stiffening ring, but the shortcoming of this structure is: when bellows was flexible up and down, one when the metal stiffening ring was stuck, and the thin-walled of bellows will make the metal stiffening ring tear, and functional reliability is poor; Simultaneously between the metal stiffening ring sometimes percussion produce noise; And because the stiffening ring inboard, need be processed into corrugated, processed complex; It is many to strengthen number of rings, complex structure, dismounting trouble; In addition, the bellows that the cold area elastomeric plastics is made in northern winter can become crisp firmly at low temperatures, and very easy breaking during dilatation owing to above various shortcoming, has influence on its use value greatly.

The purpose of this utility model is that a kind of improved bellowspump will be provided, and it not only can make tube fluid not to external leakage, has the performance of acid resistant alkali, and can improve the reliability of pump work, designs simplification, easy accessibility, and severe cold area proper functioning in the winter time.

The utility model is to realize like this; Bent axle in the pump is by the motor drives in the external world, and bent axle is formed a driving mechanism through connecting rod and guide piston.Bulge loop formula bellows is housed on guide piston, is connected with bolt with hold-down ring between the two.Partly making the cross section at the crest in the bellows outside is square or trapezoidal bulge loop.Bulge loop formula bellows adopts methods such as injection moulding or mold pressing that the bulge loop at bellows and crest place is made one by flexiplastic or rubber.On bulge loop formula bellows, be equipped with and cover the pump cover that is coated with, feed liquor valve block and fluid valve block are housed in pump cover with anti-corrosion material.

During work, bent axle and linkage mechanism become guide piston to rotation motion and do upper and lower moving along the pump housing.When guide piston moves down, the elongation of bulge loop formula bellows, the pipe internal volume increases, and hydrodynamic pressure descends, and makes fluid in the feed liquor valve flows into bellows.When guide piston moves up, bulge loop formula bellows contract, tube fluid pressure raises.This moment, both sides were adjacent under pressure, reach pressure balance in axial adjacent ripple inboard.At warp-wise, bulge loop on the bellows, under fluid pressure action, be adjacent on the inwall of the pump housing, so tube fluid pressure is mainly supported by pump housing inwall, obviously, bulge loop is as transmitting the leading role when flexible of pressure and bellows, in case go up bellows bending change by compression the time on the bellows.

In addition, plastics or other elastic materials of making bellows can become crisp firmly under low temperature, and this is a kind of universal phenomenon.But the hard fragility during this low temperature is very unfavorable for the dilatation of bellows.Be to solve so in the present invention; In guide piston, be drilled with a little duct, the space up and down of guide piston is communicated.Be provided with a check valve sheet in the piston lower end at place, aperture road.In addition, also be provided with the little steel ball of using as one-way valve in the lubricant pipe upper end in inserting the pump housing, lubricant pipe connects with oil pipe with pump housing top, is provided with electric heating tube in pump housing bottom.

Under the lower environment of temperature, make the lubricant oil of electric heating tube energising heating pump housing bottom.When guide piston moved up, the guide piston lower space increased, and the lubricant oil on guide piston top flow in the oil sump at the bottom of the pump through the duct from top to bottom.When guide piston moved down, lower volume reduced, and pressure raises, and check valve sheet is closed.Simultaneously, by the lubricant oil after the electric heater for heating, back down little steel ball in the oil sump, flow to pump housing top through oil pipe, heat flow of lubricant to the bulge loop formula bellows periphery of heat.This heat preserving method that flows in bulge loop formula bellows periphery by hot lubricant oil, structure is very simple, only need add an electric heating tube, the little valve block of plastics, a little steel ball.Even under severe cold temperature, still can keep bulge loop formula bellows good flexibility and elasticity, to meet the requirement of bulge loop formula bellows dilatation.

Compare with original technology, its techno-economic effect is as follows:

1. simplified structure is convenient to dismounting, has reduced cost.

2. improve functional reliability and reduce noise.

3. can adapt to proper functioning under the low temperature environment.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing.

Fig. 1 is the sectional drawing of the bulge loop formula bellowspump of proposition according to the present invention.

The hot oil circulation system of heating bulge loop formula bellows was formed schematic representation when Fig. 2 was low temperature.

Describe concrete pump structure details and the working condition that proposes according to the present invention in detail below in conjunction with Fig. 1, Fig. 2.

The driving mechanism of forming this pump by bent axle (8), connecting rod (7).The small end of connecting rod (7) is connected with pin (10) on the guide piston (6).Be connected with bulge loop formula bellows (1) in guide piston (6) upper end, bulge loop formula bellows (1) is in crest location by bellows with outside bellows, the cross section is square or trapezoidal convex shoulder two parts are formed.Adopt methods such as injection moulding, mold pressing to make the bulge loop formula bellows (1) of an integral body by plastics or rubber.Lower protruding edge place at bulge loop formula bellows (1) is fixed on this pipe above the guide piston (6) with hold-down ring (9) and bolt.The upper flange of bulge loop formula bellows (1) is enclosed within on the pump housing (2), and then is pressed on the pump housing (2) with bolt by the pump cover (3) that feed liquor valve (4) and liquid valve (5) are housed.Constitute an enclosed space between pump cover (3), bulge loop formula bellows (1) and guide piston (6) three.Drag down in the external world, make bulge loop formula bellows (1) make fore and aft motion with guide piston (6) through bent axle (8), connecting rod (7).When bulge loop formula bellows (1) tension was extended, the pipe internal volume increased, and pressure descends, and fluid is extraneous certainly in feed liquor valve (4) intake channel.When bulge loop formula bellows (1) by compression the time, the pipe internal pressure raises, and as elastomeric bulge loop formula bellows (1) in the both sides of pump housing axial direction waveform under pressure, is close together the mutual balance of pressure.At the dilatating and deformable under fluid pressure action then of tube wall radially, bulge loop is adjacent on the internal surface of the pump housing (2).Powerful in fact hydrodynamic pressure is to be born by the castiron pump housing, and bulge loop just plays the effect of transmitting pressure and the leading role when moving up and down.At this moment, the high-pressure liquid in the pipe is outside liquid discharging valve (5) excavationg pump.

With reference to Fig. 2, in guide piston (6), be drilled with one and make guide piston (6) duct (15) that communicates, space up and down, (15) below dress check valve sheet (14) in the duct.Being provided with a little steel ball (11) in lubricant pipe (12) upper end, also is the usefulness of making one-way valve.In the oil sump of the pump housing (2) bottom, an electric heating tube (13) is housed.When low temperature environment is worked, make electric heating tube (13) energising, the lubricant oil that the heating pump housing (2) bottom stockpiles.Because moving up and down of guide piston (6), guide piston (6) below volume changes, and the pressure in this volume is also changed thereupon.When guide piston (6) when moving up, this piston lower space increases, the space internal pressure descends, at this moment, under differential pressure action, check valve sheet (14) is opened, little steel ball (11) is closed, the lubricant oil on guide piston (6) top is through the duct (15) from top to bottom, and check valve sheet (14) flows in the oil sump of the pump housing (2) bottom, is subjected to electric heater for heating.When guide piston (6) when moving down, the piston lower space reduces, the space internal air pressure increases, check valve sheet this moment (14) is closed under differential pressure action, and the lubricant oil of heat backs down little steel ball (11), through oil pipe flow to be in the pump housing (2) top bulge loop formula bellows (1) on every side, warm heat should pipe, at lubricated motion component.Pump running hours, hot lubricant oil will circulate and endlessly warm up hot bulge loop formula bellows (1), this is guaranteed hold good stretchability and bending fatigue resistance energy.

Claims

A kind ofly come pump work, that can carry corrosive fluid, can not leak by volume-variation, it is characterized in that in the pump housing (2) of bulge loop formula bellowspump, being equipped with one do fore and aft motion, can pump imbibition body bulge loop formula bellows (1) and driving mechanism thereof:

A, described bulge loop formula bellows (1) is to make with plastics or rubber, the crest place of each road ripple of the bellows outside has one cross section to be square or trapezoidal bulge loop, these bulge loops and bellows are made one with a kind of material, constitute bulge loop formula bellows (1), the external diameter of bulge loop is slightly less than the internal diameter of the pump housing (2), when in the pipe pressure being arranged, bulge loop formula bellows (1) has the resiliently deformable that expands outwardly, its bulge loop just is adjacent on the inwall of the pump housing (2), the propagation of pressure that acts in the pipe is arrived on the inwall of the pump housing (2), huge pressure is by the inwall supporting of the pump housing (2), bulge loop is done the leading role of bulge loop formula bellows (1) when flexible simultaneously, the upper flange of bulge loop formula bellows (1) is pressed on the pump housing (2) by pump cover (3), the lower protruding edge of bulge loop formula bellows (1), with hold-down ring (9) be bolted on the guide piston (6), constitute an enclosed space thus;

B. in guide piston (6), be drilled with and make together on the guide piston (6), the duct (15) that following space communicates, below the duct, be provided with check valve sheet (14), lubricant pipe (12) upper end in being located at the pump housing (2) is provided with little steel ball (11), in the oil sump of the pump housing (2) bottom, be provided with electric heating tube (13), when under low temperature environment, working, by the lubricant oil in electric heating tube (13) the heating oil sump, at guide piston (6) when moving up and down, cooperate check valve sheet (14) and little steel ball (11) to open and close, make hot lubricant oil flow to bulge loop formula bellows (1) through little steel ball (11) from lubricant pipe (10), (15) flow back to oil sump through check valve sheet (14) from the duct again, constituted one thus at the bottom of when temperature bulge loop formula bellows the warming circulatory system and lubrication system.