CN2620110Y

CN2620110Y - Improved liquid medium diaphragm positive displacement pump

Info

Publication number: CN2620110Y
Application number: CN 03221341
Authority: CN
Inventors: 蒋龙福; 闵锡君; 沈亦晨
Original assignee: Yixing Zhous Pump Industry Co Ltd
Current assignee: Yixing Zhous Pump Industry Co Ltd
Priority date: 2003-04-17
Filing date: 2003-04-17
Publication date: 2004-06-09
Anticipated expiration: 2013-04-17

Abstract

The utility model relates to a positive displacement pump, in particular to the improvement of a reciprocating varactor liquid medium diaphragm varactor pump, which is characterized in that one end is used to be fixed on the cylinder liner, and a plunger is replaced by one end closed non-contact expansion bellows for reciprocating motion. The reciprocating varactor becomes a motionless sealing structure to ensure that the liquid medium inside the pump will not in fluid leakage reduction because of the seal wear and will not with air inflow to affect the normal work of pump. Thus, the work of pump is more reliable with more stable operation. The convex globoidal diaphragm is changed to a plate diaphragm in which the centre radial is provided with a S-shaped compensation ring. Thus the diaphragm in reciprocating motion becomes a non-area compression translational turning. Therefore, the fold crack and damage of diaphragm due to the gauffer resulting from the area compression will not occur, and the diaphragm tear resistance and anti-bending capability are excellent. Moreover the S-shaped compensation structure is with large distortion allowance, which can completely meet the requirement of diaphragm reciprocating telescopic varying capacity.

Description

A kind of improved liquid medium barrier film displacement pump

Technical field

Model utility relates to a kind of displacement pump, especially about the improvement to reciprocal transfiguration liquid medium barrier film displacement pump.

Background technique

Carry strong corrosive medias such as inflammable, explosive, corrosivity strong medium such as toluene, the concentrated sulphuric scid, methyl alcohol, acetone, bromine, adopt usually that high self-priming, stationary seal, nothing are leaked, safe and reliable transfiguration diaphragm pump.Transfiguration diaphragm pump barrier film adopts arcuate structure usually, the barrier film of arcuate structure is when reciprocating reversing, because the sectional area that protrudes arc is much larger than break-in flex point area, so diaphragm is by the flex point break-in time, needs to cause the area compression just can reach break-in through the torsional deformation etc. of self.Carry this type of medium to adopt the fluoroplastic barrier film usually yet adapt to, fluoroplastic barrier film ductility is relative with anti-flexibility relatively poor, and the self-compensating ability is low, the folding crape that the reciprocal break-in of barrier film high frequency causes, easily cause the jackknifing damage of diaphragm, shortened the working life of diaphragm.Secondly, the connecting rod that promotes work done and commutation directly drives barrier film, also can influence diaphragm working life.

For overcoming direct-acting type diaphragm of diaphragm pump short shortcoming in fragile working life, propose to adopt plunger and approximate flat membrane to form plunger membrance pump such as Fig. 1 by the people, its structure is that barrier film 4 is fixed on long cylinder sleeve 2 end faces, be provided with reciprocal movable plunger 1 in the cylinder sleeve, and in the space 3 of plunger end face and barrier film formation, fill with incompressible working liquid body such as oily medium.By the to-and-fro motion of plunger 1 in cylinder sleeve 2, cause the transfiguration of oiling space periodicity, make the liquid medium in it inhale/push away the back and forth operation of drive barrier film do, thereby make the pump chamber transfiguration reach fed sheet of a media.Since barrier film be promote by the flexible liquid medium reciprocating, thereby evenly stressed and need not commutate and just can reach the pump chamber transfiguration, thereby effectively prolonged barrier film working life.Yet, this kind structure diaphragm pump still has its deficiency: major defect is to have motive sealing between plunger and cylinder sleeve, and anti-leak safety reliability and poor stability, long-time running sealing wear can cause liquid working medium to leak, cause working solution to leak, and ambient air infiltrate.The working solution not only befouling environment that leaks causes that liquid working medium reduces between plunger and barrier film, influences diaphragm pump and effectively moves; And the air infiltration, because the compressibility of gas makes barrier film back and forth move actual volume and reduces that influence pump and inhale flow and pressure, serious pump can't be worked.Especially when carrying high pressure medium or Lower tank medium, this defective is more obvious for above-mentioned shortcoming.Therefore, get rid of gas in the working solution, exhaust and fluid infusion system must be set, fluid infusion and exhaust structure complexity, troublesome poeration on pump for guaranteeing that effectively working solution does not reduce, reaching.

Summary of the invention

The purpose of model utility is to overcome the deficiency of above-mentioned prior art, provides a kind of simple in structure, easy and simple to handle, good seal performance, and the diaphragm long service life can be accomplished the complete leak free liquid medium barrier film displacement pump of working medium.

The model utility purpose realizes, the main improvement changes oil into place in the cylinder sleeve contactless flexible bellows every the reciprocal plunger of formula transfiguration diaphragm pump, stretch by bellows and between its periphery and cylinder sleeve internal diameter, to produce transfiguration, it is reciprocating to promote barrier film by built-in incompressible liquid working medium, reaches the pump chamber transfiguration.Specifically, model utility liquid medium barrier film displacement pump, comprise cylinder sleeve and built-in to-and-fro motion var, be arranged on the barrier film of reciprocal var front jar sheath end, full liquid-working-medium between reciprocal var and barrier film, for be fixed on the bellows of the cylinder sleeve the other end less than cylinder sleeve internal diameter front end closure, rear end, said reciprocating power axle is connected on the bellows closing face its feature at said reciprocal var.

Model utility has than high output pressure pump for improving radially bearing capacity of bellows, and the support bearing ring can be set in the bellows, a kind of easy support bearing ring, for composite structure is hacked in employing, i.e. circular pressure-bearing support ring in each ripple is by at least two assembling combination.For avoiding the direct and bellows contact damage bellows of hard pressure-bearing support ring, reaching increases the bellows compression volume, and a kind of better mode is that the pressure-bearing support ring is made the curved mushroom in top, and top arc and bellows ripple are matched.So both increased the pressure-bearing area of contact of support ring top and bellows ripple, make bellows stressed evenly, can effectively prolong bellows working life, simultaneously Bao mushroom handle, increase bellows compression displacement space again, thereby increased the scalable degree and the varying capacity of bellows.Model utility also can put ∩ shape (also can claim U-shaped) overall flexibility sheath again at the support ring top, and another effect of ∩ shape overall flexibility sheath can be stablized the support ring of composite structure, prevents in service falling apart.

For the higher occasion of pumping pressure, model utility also can have the no shrinkage fiber fabric ripple lining that coincide with the bellows similar shape by lining in the bellows inner chamber, because the shrinkage-void support of neck bush, can effectively avoid bellows pressurized radial contraction distortion to contract in causing, thereby stablize the volumetric efficiency of pump.

For the medium in the higher Lower tank of some suction heads (as the pond deeply more than 4M), for preventing that negative pressure causes the expansion of bellows radially outward in the pump chamber, influence flow and suct ability, model utility also can have the nothing expansion fabric radiation fins that coincide with the bellows similar shape and/or set up the similar measures that prevents that bellows from outwards expanding such as preventing tensioner ring in ripple in the increase of bellows periphery.In addition, the anti-protection of expanding also helps the positioning stablity of inside support ring.

Remove this, folder muscle (folder screen cloth or fiber) structure in the model utility bellows also can adopt to reduce the bellows radial deformation, improves the outer ability and increasing the service life of expanding that contracts in anti-.

The model utility barrier film can be common arcuate structure, also can be approximate dull and stereotyped plank frame, and wherein a kind of better structure is that diaphragm radially is provided with the plank frame that the above S connected in star of a ripple compensates in the middle part.Board-like diaphragm does not need the compressing area break-in back and forth the time, have in the diaphragm prolongation in working life, and the radially S groove at middle part compensation, make diaphragm again when to-and-fro motion, reach break-in oneself radial compensation by S connected in star structure, uneven distortion causes diaphragm to tear damage in the time of can effectively avoiding the reciprocal break-in of diaphragm.

Model utility is owing to adopt built-in bellows than the small end face sealing to replace plunger to do reciprocal transfiguration, not only can reach the function and the advantage of plunger membrance pump equally, and the motion of having eliminated plunger fully seals, make reciprocal transfiguration become no motion sealing configuration, guarantee that liquid medium can not cause working solution to reduce because of sealing wear leaks in it, and inwardly gas leakage influence the pump proper functioning, make pump work more reliable, move more stable.The convex globoidal diaphragm, the board-like diaphragm that S connected in star compensated loop is arranged in the middle part of changing into radially, make barrier film when to-and-fro motion, become no area compression translation break-in, thereby can not produce the folding crape that causes because of the area compression and cause diaphragm jackknifing damage, the diaphragm anti-fatigue performance increases substantially, and S connected in star collocation structure, distortion allowance is big, can satisfy the requirement of the reciprocal Telescopic variable volume amount of barrier film fully.The inside and outside anti-measure of expanding, contract of bellows has effectively guaranteed the suction of pump high-pressure delivery and low level again.Even model utility is when the diaphragm damage that contacts with medium, cause to be transferred medium and to leak in the fluid working cavity,, play double-layer seal and insure because the sealing of bellows and cylinder sleeve can guarantee that still fed sheet of a media can not leak, pump still can work on, row maintenance again after finishing certain operation.

Below in conjunction with two indefiniteness embodiments, further specify the model utility diaphragm structure.

Description of drawings

Fig. 1 is a prior art plunger membrance pump structure schematic representation.

Fig. 2 is a model utility ripple diaphragm pump structure schematic representation.

Fig. 3 is a bellows inside support ring structural representation.

Fig. 4 is Fig. 3 left side TV structure schematic representation.

Fig. 5 does not have the liner of contraction bellows structure schematic representation for band.

Fig. 6 is the anti-tensioner ring bellows structure schematic representation of ripple peripheral zone.

Fig. 7 does not have the liner of contraction for being with simultaneously, prevents tensioner ring and does not have expansion radiation fins bellows structure schematic representation.

Embodiment

Embodiment 1: referring to Fig. 2,3,4, model utility liquid medium barrier film displacement pump has reciprocating power head 7, and connecting sleeve 8 and liquid medium barrier film displacement pump are formed.Liquid medium barrier film displacement pump comprises cylinder sleeve 2, built-in diameter than the cylinder sleeve internal diameter little, end sealing, the other end is fixed on the flexible bellows 9 of cylinder sleeve end, the board-like barrier film 4 that the above S groove compensation of one ripple is arranged in the middle part of the cylinder sleeve the other end is fixed with radially, import and export pump valve 5, the pump housing 6, bellows and barrier film space are filled with the liquid oils medium.Power output rocker arm is the ripple closed end fixedly, and it is reciprocating to drive bellows.Inside support ring 12 is arranged in the bellows, and the pump work media cavity is provided with pouring orifice 10 and fuel outlet 11.Inside support ring has less two annulus 11.1 and 11.2 superimposed, radially is inlaid with to differentiate curved mushroom support ring 10 compositions in combination top.

Embodiment 2: referring to Fig. 5, as described above, for improving the bellows anti-pressure ability, bellows 12.1 inner chambers are lined with the no shrinkage fiber fabric ripple lining 12.2 that coincide with the bellows similar shape.

Embodiment 3: referring to Fig. 6, as embodiment 2, for improving pump low level suction capactity, also have anti-tensioner ring 13 in the bellows 12 periphery ripples.

Embodiment 4: referring to Fig. 7, as embodiment 3, the bellows periphery also has the nothing expansion fabric radiation fins 14 that coincide with the bellows similar shape.

Go back other liquid-working-medium of inflatable between model utility bellows and barrier film.

Claims

1, a kind of liquid medium barrier film displacement pump, comprise cylinder sleeve and built-in to-and-fro motion var, be arranged on the barrier film of reciprocal var front jar sheath end, full liquid-working-medium between reciprocal var and barrier film, for be fixed on the bellows of the cylinder sleeve the other end less than cylinder sleeve internal diameter, front end closed rear end, said reciprocating power axle is connected on the bellows closing face its feature at said reciprocal var.

2, according to the described liquid medium barrier film of claim 1 displacement pump, its spy is that the support bearing ring is arranged in the said bellows.

3, according to claim 1 or 2 described liquid medium barrier film displacement pumps, its spy is that said bellows inner chamber is lined with the no shrinkage fiber fabric ripple lining that coincide with the bellows similar shape.

4, according to the described liquid medium barrier film of claim 1 displacement pump, its spy is that said bellows periphery has nothing expansion fabric radiation fins and/or the anti-tensioner ring in ripple that coincide with the bellows similar shape.

5, according to the described liquid medium barrier film of claim 1 displacement pump, its spy is that said bellows is the rubber corrugated pipe of interior folder muscle structure.

6, according to claim 1 or 5 described liquid medium barrier film displacement pumps, its spy is that said bellows is double layer construction.

7, according to the described liquid medium barrier film of claim 1 displacement pump, its spy is the board-like diaphragm that said barrier film has the above S groove of a ripple to compensate for middle part radially.

8, according to the described liquid medium barrier film of claim 1 displacement pump, its spy is that said liquid-working-medium is oily medium.

9, according to the described liquid medium barrier film of claim 1 displacement pump, its spy is that said pump work media cavity has fluid injection and unloads the liquid mouth.