CN203239991U

CN203239991U - Tank bottom diaphragm valve

Info

Publication number: CN203239991U
Application number: CN 201320255097
Authority: CN
Inventors: 李满然; 谭冬阳; 项振国
Original assignee: ZHEJIANG RITE TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG RITE TECHNOLOGY Co Ltd
Priority date: 2013-05-09
Filing date: 2013-05-09
Publication date: 2013-10-16
Anticipated expiration: 2023-05-09

Abstract

The utility model relates to a tank bottom diaphragm valve which solves the problems that when an existing tank bottom diaphragm valve is used, media are prone to being left at a tank bottom, and use requirements in the field of pharmacy or food or biological engineering cannot be met. The tank bottom diaphragm valve is characterized in that a valve body is provided with a liquid inlet and a liquid outlet, the section of the liquid inlet is cone-shaped, the included angle between the axis of the liquid outlet and the end face of the liquid inlet is 30 degrees, an isolation dam is arranged between the liquid inlet and the liquid outlet, and a diaphragm leaf can be attached to the isolation dam in a sealed mode under the drive of a valve element. The tank bottom diaphragm valve has the advantages that the liquid inlet of the diaphragm valve is cone-shaped, when installed, the diaphragm valve can be installed at the bottom of the tank bottom, when media are discharged from the tank bottom, the media can be directly discharged out of a tank body through the cone-shaped liquid inlet, no media are left is the tank body, and an extraction tank or a concentration tank can surely meet requirements of hygiene standards in the field of pharmacy or food or biological engineering.

Description

Membrane valve at the bottom of a kind of tank

Technical field

The utility model relates to a kind of valve, relates in particular a kind of membrane valve that is installed at the bottom of the tank, is mainly used in valve field.

Background technique

In recent years, also more and more higher to the requirement of valve along with the demand in market, corrosion resistance particularly, the aspects such as noresidue.Be mainly used in pharmacy and the bioengineering field of aseptic operating mode because of membrane valve, so it directly requires each component of circulation medium in contact valve need to have the required various characteristicses of pharmaceutical field such as chemical stability, corrosion resistance, wearability, heat resistance, acidproof, ethanol-tolerant, also must not have simultaneously medium to be detained fluid phenomenon and Dead Core Problems.And membrane valve at the bottom of the existing tank, its diaphragm material generally all is ethylene propylene diene rubber (EPDM), this material surface roughness is general, and wear resistance is also relatively low, and is high temperature resistant also with regard to 140 °.Even some is some ball valves or butterfly valve at the bottom of tank, and so they do not have the such function of membrane valve, can't satisfy the usage requirement of pharmacy or bioengineering field.

The model utility content

In order to solve above technical problem, the utility model provides membrane valve at the bottom of a kind of tank, and this membrane valve not only can be realized the chemical properties such as corrosion-resistant, acidproof, simultaneously, also can realize medium without being detained.

For solving above technical problem, the technological scheme that the utility model is taked is membrane valve at the bottom of a kind of tank, comprise valve body, valve gap, diaphragm, spool, valve rod and operation handwheel, diaphragm is installed between valve body and the valve gap, valve rod one end passes valve gap and fixes with the operation handwheel, the other end is connected with spool, it is characterized in that being provided with liquid entering hole and liquid outlet at described valve body, the liquid entering hole cross section is tapered, included angle A between the axis of liquid outlet and the liquid entering hole end face is 30 °, be provided with isolation dam between liquid entering hole and liquid outlet, diaphragm can be fitted with the isolation dam sealing under the driving of spool.

Further, the end that described isolation dam and diaphragm fit is provided with curve bath, described diaphragm under the driving of spool with the sealing that fits of the curve bath of isolation dam.

Further, be bonded with the ptfe sheet layer on the one side of described diaphragm and medium contact, the sealing that under the driving of spool, can fit with the curve bath of isolation dam of this lamella.

The beneficial effects of the utility model are by the liquid entering hole of membrane valve is arranged to taper, like this at membrane valve when mounted, bottom can being installed at the bottom of the tank, when carrying out media discharge at the bottom of the tank, medium just can be directly external through the liquid entering hole drain tank of taper, make in the tank body to retain without medium, guarantee that extractor or concentration tank meet the sanitation-grade usage requirement of pharmacy, food or bioengineering field.

Description of drawings

Fig. 1 is the main TV structure figure of membrane valve at the bottom of a kind of tank of the utility model embodiment

Fig. 2 is A--A place sectional view among Fig. 1

Fig. 3 is the three-dimensional structure diagram of membrane valve at the bottom of a kind of tank of the utility model embodiment

Embodiment

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

As Figure 1-3, the utility model is membrane valve at the bottom of a kind of tank, comprise valve body 1, valve gap 2, diaphragm 3, spool 4, valve rod 5 and operation handwheel 6, diaphragm 3 is fixed between valve body 1 and the valve gap 2, valve rod 5 one ends pass valve gap 2 and fix with operation handwheel 6, the other end is connected with spool 4, for membrane valve at the bottom of solving existing tank in use, easily retain medium at the bottom of the tank, can't satisfy pharmacy, the usage requirement of food or bioengineering field, be provided with liquid entering hole 11 and liquid outlet 12 at described valve body 1, liquid entering hole 11 cross sections are tapered, included angle A between the end face of the axis of liquid outlet 12 and liquid entering hole 11 is 30 °, is provided with isolation dam 13 between liquid entering hole 11 and liquid outlet 12, and diaphragm 3 can be fitted with isolation dam 13 sealings under the driving of spool 4; By the liquid entering hole 11 of membrane valve is arranged to taper, like this when membrane valve is installed, bottom can being installed at the bottom of the tank, when carrying out media discharge at the bottom of the tank, medium just can be directly external through liquid entering hole 11 drain tanks of taper, make in the tank body to retain without medium, guarantee that extractor or concentration tank are detained without medium, meet the sanitation-grade usage requirement of pharmacy, food or bioengineering field.

In the present embodiment, in order to guarantee the sealing effect of membrane valve, described isolation dam 13 is provided with curve bath 131 with the end that diaphragm fits, described diaphragm 3 under the driving of spool 4 with the sealing that fits of the curve bath 131 of isolation dam 13, by at isolation dam 131 curve bath 131 being set, when operation handwheel 6 at actuate valve stem 5 and spool 4 during to valve body 1 interior motion, diaphragm 3 can be in the curve bath 131 that snaps in isolation dam 13 be depressed on the top of spool 4, so just can increase accordingly the area of contact of diaphragm 3 and isolation dam 13, improve the sealability of membrane valve.

In the present embodiment, because existing diaphragm 3 is acidproof, corrosion resistance and heat-resisting quantity are relatively poor, be bonded with ptfe sheet layer 31 on the one side of described diaphragm and medium contact, the sealing that under the driving of spool 4, can fit with the curve bath 131 of isolation dam 13 of this lamella 31, teflon has good chemical stability, to the concentrated sulphuric scid, nitric acid, hydrochloric acid, alcohol etc. all have corrosion resistance, its operating temperature can reach-25 ° to 250 ° C, bonding ptfe sheet layer 31 on diaphragm 3, effectively solve diaphragm 3 at the required various characteristics needs of sanitation-grade pharmacy and bioengineering field, improve working life, strengthened sealability.

Above-described embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection domain of the present utility model.

Claims

1. membrane valve at the bottom of the tank, comprise valve body, valve gap, diaphragm, spool, valve rod and operation handwheel, diaphragm is installed between valve body and the valve gap, valve rod one end passes valve gap and fixes with the operation handwheel, the other end is connected with spool, it is characterized in that being provided with liquid entering hole and liquid outlet at described valve body, the liquid entering hole cross section is tapered, included angle A between the axis of liquid outlet and the end face of liquid entering hole is 30 °, be provided with isolation dam between liquid entering hole and liquid outlet, diaphragm can be fitted with the isolation dam sealing under the driving of spool.

2. membrane valve at the bottom of a kind of tank according to claim 1 is characterized in that the end that described isolation dam and diaphragm fit is provided with curve bath, described diaphragm under the driving of spool with the sealing that fits of the curve bath of isolation dam.

3. membrane valve at the bottom of a kind of tank according to claim 1 is characterized in that being bonded with the ptfe sheet layer on the one side of described diaphragm and medium contact, the sealing that can fit with the curve bath of isolation dam under the driving of spool of this lamella.