CN2321956Y

CN2321956Y - Machanic driving type membrane measuring pump

Info

Publication number: CN2321956Y
Application number: CN 98209300
Authority: CN
Inventors: 陈葆华
Original assignee: HUALI PUMP FACTORY HANGZHOU CITY
Current assignee: HUALI PUMP FACTORY HANGZHOU CITY
Priority date: 1998-04-21
Filing date: 1998-04-21
Publication date: 1999-06-02
Anticipated expiration: 2008-04-21

Abstract

The utility model relates to a mechanic driving type membrane metering pump. The utility model is especially used for delivering corrosive fluid, or delivering fluid with higher requirements on clear purity or hygiene degree. The utility model comprises a pump shell, a membrane, a draw rod, a liquid inlet valve and a liquid outlet valve. The utility model is characterized in that the membrane is positioned in one place; the interior of the place is provided with a circular surface; the cross section of the circular surface is an arc curved shape; the draw rod is provided with a membrane support plate which causes the shape and the size of the entire membrane plane of the interior of the pump shell to be matched. The utility model solves the problems of the existing mechanic driving type membrane metering pump that the output pressure can not exceed 1MPa, the membrane is easily damaged, the service life is short, etc.

Description

The mechanically driver type diaphragm metering pump

The utility model relates to a kind of mechanically driver type diaphragm metering pump.It can be in industry such as oil, chemical industry, light industry, pharmacy, food and drink, environmental protection water treatment quantitative conveyance fluid, particularly carry corrosive fluid, the fluid of perhaps carrying some that pure degree or sanitation degree are had relatively high expectations.

Existing mechanical drive-type diaphragm pump can see from Fig. 6 and Fig. 7 that wherein Fig. 6 is its positive view, and Fig. 7 is its left view.It contains pump case 2, diaphragm 3, pull bar 4, feed liquor valve 6, liquid valve 1, and diaphragm is affixed with pull bar, and the reciprocal promotion of tension member and do axial back and forth agitating is so that extraneous fluid flows into, flows out from liquid valve after the supercharging from the feed liquor valve.The shortcoming of existing this mechanically driver type diaphragm pump is: 1) diaphragm 3 is positioned at one with the perpendicular plane of pump case inwall, and its periphery is fastened on the pump case, therefore it is limited at axial amount of deformation, that is the pressure that this pump is carried only limits to below the 1MPa, otherwise diaphragm ruptures because of serious varicose; 2) diaphragm is subjected to the tangential force effect of reciprocal alternation when diaphragm pump is worked, and damages because of tired easily, perhaps ruptures because of the tangential force effect, can't use.

The purpose of this utility model is to overcome the existing shortcoming of above-mentioned existing mechanical drive-type diaphragm pump, the mechanically driver type diaphragm metering pump of a kind of discharge pressure height, long service life is provided, and makes it have characteristics such as simple in structure, easily manufactured and low cost of manufacture.

The utility model mechanically driver type diaphragm metering pump, it contains pump case, diaphragm, pull bar, feed liquor valve, liquid valve, its feature is: introducing its section of ring in the plane at diaphragm place is the toroidal surface of arc-shaped bend, and has the holder lamina membranacea that can match with the shape and the size of the whole diaphragm place face in the pump case on the pull bar.

Diaphragm in the utility model mechanically driver type diaphragm metering pump can have its thickness evagination circle bigger than the thickness of diaphragm own on its periphery; Also can have fibre cloth in the face of diaphragm place.

The utility model has the advantages that: 1) in the plane at diaphragm place, introduced its section and be after the toroidal surface of arc-shaped bend, diaphragm is amplified at axial amount of deformation, therefore the discharge pressure of pump can be brought up to more than the 2MPa, even the short time can bring up to 4～5MPa, thereby this mechanically driver type diaphragm metering pump much lower than hydraulic drive type diaphragm metering pump price is widely used; 2) in plane, diaphragm place, introduced after its section is the toroidal surface of arc-shaped bend, improved diaphragm stressing conditions at work widely, and also introduced one deck fibre cloth in the diaphragm its intensity is increased widely, so improve the working life of diaphragm; 3) on the diaphragm periphery, have after the evagination circle, be equivalent to be provided with a seal ring, therefore can guarantee that pump does not leak under high-pressure situations in the diaphragm installation place of pump case.

To and contrast accompanying drawing by embodiment below, the utility model will be further described below.Have in the accompanying drawing:

Fig. 1 and Fig. 2 are respectively the positive view and the left views of the utility model mechanically driver type diaphragm metering pump;

Fig. 3 is the same motor of the utility model diaphragm metering pump, the front view when transmission device fuses;

Fig. 4 Fig. 5 is the parts drawing of the diaphragm 3 of the utility model diaphragm metering pump, and wherein Fig. 4 is its positive view, the left view that Fig. 5 is it;

Fig. 6 and Fig. 7 are the structural drawing of existing mechanical drive-type diaphragm pump, and wherein Fig. 6 is its positive view, the left view that Fig. 7 is it.

Can see the utility model metering diaphragm pump structure from Fig. 1 and Fig. 2, it includes pump case 2, diaphragm 3, pull bar 4, feed liquor valve 6, liquid valve 1.

Pump case 2 is involuted by left and right halves, and diaphragm 3 has been installed on the involutory face, and the halves pump case makes them be tightened to one by four bolts 7.It is the working room of diaphragm metering pump that pump case is isolated space, the formed left side, back at diaphragm 3, and feed liquor valve 6 and liquid valve 1 with dual ball-valve structure have been installed respectively on the pump house wall at this place, chamber; Install one on the right-hand member wall of pump case and had the pull bar 4 of importing power on it, be presented as motor 8, transmission device 9 that this pull bar provides motion and power among Fig. 3.Pull bar 4 connects with the to-and-fro motion output shaft in the transmission device.

The structure of diaphragm 3 can be seen from Fig. 1, Fig. 4 and Fig. 5, it is a circular piece, have the toroidal surface 31 that its section of ring is convexly curved in this plane, sheet place, the toroidal surface of the arc-shaped bend in the present embodiment is that section configuration is the toroidal surface of circular arc, and the race diameter D of toroidal surface is identical with the internal diameter of pump case; Diaphragm still remains the plane with the inner ring (being the formed circle of diameter d) of toroidal surface with interior part in addition in the outer ring of toroidal surface (being the formed circle of diameter D); The center of diaphragm has can make it use hole 33 with the connection that holder lamina membranacea 41 connects one.Pump case has its thickness evagination circle 32 bigger on the periphery of diaphragm, so that can obtain sealing well in the installation place of diaphragm than the thickness of diaphragm own.Diaphragm in the utility model has one deck layer of fibers 34 in its place face, so that the mechanical strength of diaphragm increases, prolong the working life of diaphragm widely.

Holder lamina membranacea 41 is positioned at the end of pump case shell the inner of pull bar 4, its end face has shape identical with whole diaphragm place face in the pump case and size, therefore both can fit like a glove, thereby make the holder lamina membranacea bear the diaphragm whole active forces that suffered fluid produces diaphragm during compressed fluid left, and make diaphragm avoid damaging for diaphragm.The center of holder lamina membranacea has screw, so that diaphragm connects with screw 5 with the holder lamina membranacea.

The utility model diaphragm metering pump has been done test, and test is to carry out under the delivery pressure of 2MPa, after turning round seven months diaphragm is checked, this diaphragm is excellent.Met NBS this working life of diaphragm, and delivery pressure can satisfy the demand of user to the mechanically driver type diaphragm metering pump.

Claims

1, a kind of mechanically driver type diaphragm metering pump, it contains pump case (2), diaphragm (3), pull bar (4), feed liquor valve (6), liquid valve (1), it is characterized in that: introducing its section of ring in the plane at diaphragm (3) place is the toroidal surface (31) of arc-shaped bend, and has the holder lamina membranacea (41) that can match with the shape and the size of the whole diaphragm place face in the pump case on the pull bar (4).

2, mechanically driver type diaphragm metering pump as claimed in claim 1 is characterized in that: have its thickness evagination circle (32) bigger than diaphragm thickness on the periphery of said diaphragm (3).

3, mechanically driver type diaphragm metering pump as claimed in claim 1 or 2 is characterized in that: have fibre cloth (33) in the face of said diaphragm (3) place.