CN2646413Y

CN2646413Y - Accurate trace quantity metering pump

Info

Publication number: CN2646413Y
Application number: CN 03277793
Authority: CN
Inventors: 边东福; 路广志
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-17
Filing date: 2003-07-17
Publication date: 2004-10-06
Anticipated expiration: 2013-07-17

Abstract

The utility model discloses a precision trace amount metering pump comprising a pump body and a pump head. An inlet holding valve and an outlet check valve are respectively arranged at the inlet and outlet communicated with the internal cavity body of the pump head. The utility model is characterized in that: the outlet check valve comprises a duct arranged inside the valve body; the upper end of the duct is thoroughly enclosed; throughholes communicated with the inner holes of the duct are arranged on the side wall of the duct; fluorocarbon silicone rubber tubes are sleeved onto the duct; the inlet holding valve comprises a seal ball arranged inside the valve core; a compressing leg at the upper part of the seal ball compresses onto the seal ball. The metering pump meters precisely with precision up to 0.01ml, can realize trace amount liquid transmission ranging from 0.2ml to 5ml; in addition, the pump body is anti acid or alkaline erosion, therefore is in particular suitable for application of high precision medicine adding, less medicine adding, and inline timing and fixed amount medicine adding field.

Description

Accurate micro-measurement pump

Technical field

The utility model relates to a kind of pump, is a kind of metering pump specifically.

Background technique

Metering pump is a kind of pump that can be used for controlling output quantity, and its output quantity can be set as required.Known metering pump is made of the pump housing and pump head, all there is one-way valve at the place, entry and exit of pump head to prevent liquid return, but the one-way valve of existing metering pump adopts spherical valve core usually, because material and structural problem, have following defective: (1) is acid-alkali-corrosive-resisting not; (2) the one-way valve leakage causes that metering is inaccurate, precision is not high and carry feed liquid inhomogeneous; (3) regularly dosing, waste reagent serious (peristaltic pump structure); (4) cost height.Especially for use in micro-dosing field, its shortcoming seems more outstanding.

The model utility content

At the problems referred to above of existing metering pump existence, but the purpose of this utility model is to provide a kind of micro-measurement pump of accurate measurement.

Another purpose of the present utility model also is to provide a kind of corrosion resistant metering pump.

In order to achieve the above object, the technical solution adopted in the utility model is: accurately the micro-measurement pump comprises the pump housing and pump head, in inlet that is communicated with the pump head cavity body and the outlet inlet one-way valve and outlet non-return valve are arranged, outlet non-return valve comprises a conduit that is installed in the valve body, shut the conduit upper end, the through hole that is communicated with the conduit endoporus is arranged on the sidewall, on conduit, be with the fluorosioloxane rubber pipe.

Through hole on the described duct wall can be two holes of symmetry, forms three-port structure with the conduit endoporus.

Described inlet one-way valve comprises the ball sealer that is installed in the spool, can have a compression leg to be pressed on the ball sealer on ball sealer top.

On described pump head, the exhaust port that is communicated with the pump head cavity can be arranged, bleed valve is installed on the exhaust port.

In order to improve decay resistance, described pump housing part can adopt the diaphragm pump pump housing, and barrier film adopts fluoroplastic film, pump head hard PVC material.

The pump housing can comprise the iron core in electromagnetic coil and the coil, and the iron core front end is connected with described barrier film.

This accurate micro-measurement pump that the utility model provides has following advantage, is particularly suitable for doing dosing pump and uses:

(1) with special outlet non-return valve structure, stop liquid return, guaranteed accurate, even, trace control liquid outlet quantity, liquid outlet quantity can conveniently be controlled in the 0.25-5ml scope.

(2) inlet one-way valve has compression leg, can stop effectively that liquid refluxes in the pump head downwards, guaranteed fluid steadily, with the outlet non-return valve common guarantee fluid precision, precision can reach 0.01ml.

(3) bleed valve on the pump head makes protection pressure difference in the pump head cavity, helps reagent and rises to cavity.

(4) employing makes that with the diaphragm pump structure and the hard PVC pump head of wear-resisting, corrosion resistant fluoroplastic barrier film the pump head corrosion resistance is strong, long service life, and cost is low.

Description of drawings

Fig. 1 is accurate micro-measurement pump structure figure of the present utility model;

Fig. 2 is accurate micro-measurement delivery side of pump check valve structure figure;

Fig. 3 is the structural drawing of the inlet one-way valve of accurate micro-measurement pump.

Embodiment

Below in conjunction with accompanying drawing and better embodiment accurate micro-measurement pump of the present utility model is described further, to help understanding content of the present utility model.

As shown in Figure 1, accurate micro-measurement pump of the present utility model adopts the diaphragm pump pump body structure, comprise the iron core 7 in pump housing coil 6, the coil 6, the barrier film 4 of iron core 7 front ends and fluoroplastic material links together, make pump housing iron core 7 isolated with the reagent in the pump head, and barrier film 4 corrosion resistances are strong, prevent the corrosion of acid-base pair pump.Pump head adopts the hard PVC material, and the inlet/outlet of pump head has outlet non-return valve 1, bleed valve 2 and inlet one-way valve 5, preventing liquid return, and can be by outlet valve 2 gas in the excavationg pump head cavity body easily when starting.

As shown in Figure 2, comprise valve body 36 at the outlet non-return valve body, a through hole is arranged in valve body 36, a three-way pipe 37 is arranged in the hole, be with a fluorosioloxane rubber pipe 35 outside the three-way pipe 37, valve body 36 upper ends are screwed with a nut 34 made in Great Britain, have one to connect and chew 31 in the nut 34, will connect by a pressure ring 32 and fluorine rubber pressure ring 33 and chew 31 and seal up.

As shown in Figure 3, a through hole is arranged in inlet one-way valve valve body 13, the through hole top that the upper end has a tube 11 to insert valve body, there is aperture tube 11 upper ends.Valve body 13 upper ends also have a fluorine rubber pressure ring 12, valve body 13 lower ends are equipped with one by a nut 22 made in Great Britain and connect and chew 20, connect chew 20 and 13 of valve bodies by a fluorine rubber seal ring seal, connect chew 20 and 22 on nut have a pressure ring 21 to chew 20 and compress connecing, at the bottom of valve body 13 via bottoms have a centre that the valve of through hole is arranged 19, have in the groove in the middle of the upper surface at the bottom of the valve fluorine rubber pressure ring 18 is housed, a ball sealer 17 is arranged on 19 at the bottom of the valve, also have a spool 16 to be installed in the through hole of valve body 13 on 19 tops at the bottom of the valve, 13 of spool 16 and valve bodies pass through 15 sealings of a fluorine rubber pressure ring.In the tube 11 compression leg 14 is arranged, compression leg 14 lower end diameter are less than the upper end, and the aperture that the end that diameter is little passes on the spool 16 is pressed on the ball sealer 17, and compression leg 14 can move up and down in spool 16 and tube 11.

When 6 energisings of pump housing coil, iron core 7 is because of electromagnetic force effect retraction, the barrier film 4 that drive is attached thereto is to left movement, the cavity 3 of pump head enlarges and forms vacuum, reagent liquid is chewed in the cavity 3 that 20 gravity that overcome ball sealer 17 and compression leg 14 under the atmospheric pressure effect enter pump head by connecing of pump head inlet one-way valve and is filled with cavity, vacuum pressure disappears, ball sealer 17 through hole of 19 at the bottom of falling back on the fluorine rubber pressure ring 18 valve under the deadweight and the effect of compression leg 14 rapidly seals up, and prevents that liquid is dirty in the pump head cavity.Owing to increased compression leg 14, make ball sealer not only fall rapidly but also good sealing effect, improved sealing speed and reliability, guarantee the steady of intake.After 6 outages of pump housing coil, magnetic force disappears, iron core 7 moves right under the effect of the inside spring (omitting among the figure), drive barrier film 4 extrusion chambers 3, reagent overcomes fluorosioloxane rubber pipe 35 elastic force by three-way pipe 37 in two outlet ports and sprays, chew outside 31 excavationg pumps by connecing, when barrier film 4 moves to right-hand member, pump head cavity 3 internal pressures disappear, fluorosioloxane rubber pipe 35 seals up the outlet of three-way pipe 37 rapidly by self elasticity, and its sealing speed and reliability are higher, and the liquid in the pump discharge pipe can not be passed back in the pump head cavity 3, guaranteed the precision of discharge capacity when trace, this is extremely important aspect the accurate dosing of trace.By control to the power on/off number of times of pump housing coil 6, the accurate amount of infusion of control pump, the accuracy of reagent dosage when guaranteeing to be used as dosing pump.

Claims

1, a kind of accurate micro-measurement pump, comprise the pump housing and pump head, in inlet that is communicated with the pump head cavity body and the outlet inlet one-way valve and outlet non-return valve are arranged, it is characterized in that: outlet non-return valve comprises a conduit that is installed in the valve body, shut the conduit upper end, the through hole that is communicated with the conduit endoporus is arranged on the sidewall, on conduit, be with the fluorosioloxane rubber pipe.

2, accurate micro-measurement pump as claimed in claim 1 is characterized in that: the through hole on the described duct wall is two holes of symmetry, forms three-port structure with the conduit endoporus.

3, accurate micro-measurement pump as claimed in claim 1 is characterized in that: described inlet one-way valve comprises the ball sealer that is installed in the spool, has a compression leg to be pressed on the ball sealer on ball sealer top.

4, accurate micro-measurement pump as claimed in claim 1 is characterized in that: the exhaust port that is communicated with the pump head cavity is arranged on described pump head, bleed valve is installed on the exhaust port.

5, accurate micro-measurement pump as claimed in claim 1, it is characterized in that: the described pump housing partly adopts the diaphragm pump pump housing, and barrier film adopts fluoroplastic film, pump head hard PVC material.

6, accurate micro-measurement pump as claimed in claim 5 is characterized in that: the pump housing comprises the iron core in electromagnetic coil and the coil, and the iron core front end is connected with described barrier film.