CN2199325Y

CN2199325Y - Pressure-type valve controlled piston metering pump

Info

Publication number: CN2199325Y
Application number: CN 94214504
Authority: CN
Inventors: 王东明
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-17
Filing date: 1994-06-17
Publication date: 1995-05-31
Anticipated expiration: 2004-06-17

Abstract

The utility model relates to a metering pump for conveying liquid namely a pressure-type valve controlled piston metering pump, solving the problems that the metering pumps in the prior art are not suitable for flow variation, and the metering pumps in the prior art have inaccurate measurement, complicated structure, high cost, high energy consumption, etc. The utility model utilizes an electromagnetic valve as a control part, and namely the electromagnetic valve is connected with a liquid storage cylinder and communicated with the inner part of the liquid storage cylinder. The valve corresponding to both ends of a slide valve with an iron core is respectively provided with a water outlet and a water inlet, and thus the aims of controlling the reciprocating movement of a piston and conveying liquid are obtained. The utility model realizes the one to one point movement of the pump and signals, measurement is accurate, and automation control process is convenient to realize. The utility model having simple structure, low cost and low energy consumption is particularly suitable for adding tiny flow.

Description

Pressure-type valve controlled piston metering pump

The utility model relates to a kind of metering pump that is used to carry liquid.

Metering pump of the prior art mainly contains two kinds, a kind of is to be the plunger metering pump of power with the motor, promptly the circular movement of motor is become the to-and-fro motion of plunger by bent axle, the liquid that liquid suction valve opens and closes conveying at every turn is close to equal, can evenly carry liquid, its deficiency is: 1, can only carry liquid equably, be not suitable in the changes in flow rate occasion, and time of movement be wayward; 2, complex structure costs an arm and a leg, and volume is big, adds occasion at small flow and is not suitable for; 3, energy consumption is big.Another kind is a steam reciprocating pump, is power with steam, drives the alternately switching of double end plunger to-and-fro motion by liquid suction valve, finishes the work of transporting water (or liquid), and its deficiency is: 1, be power with steam, time of movement is difficult for accurately control; 2, steam inconvenience is taken in each working site, and noise is big; 3, complex structure costs an arm and a leg, and is bulky, inapplicable in small flow interpolation occasion; 4, energy consumption is big.

The utility model purpose provides a kind ofly can accurately measure various liquid and be convenient to realize that the price of automatically adding is low, energy consumption is little according to arbitrary input.Power is taken pressure type valve control piston metering pump easily.

The utility model is by having suction, the liquid container of liquid discharging valve, packed-piston in the liquid container and control section thereof are formed, it is characterized in that described control section realizes by solenoid valve, be that the electromagnetic valve body that electromagnetic coil and iron core guiding valve are equipped with in its inside is connected with liquid container top, and have a solenoid valve water outlet that communicates with liquid container top hydraulic chamber on the valve body, on the valve body of guiding valve one end, have drain opening, between drain opening and the guiding valve Returnning spring is housed, on the valve body of the guiding valve the other end, have water intake, between packed-piston and liquid container bottom, Returnning spring is housed.

Below in conjunction with accompanying drawing the utility model embodiment is described as follows:

Fig. 1 pressure type valve control piston metering pump structure sectional view.

Fig. 2 embodiment 2 structure sectional views.

Embodiment 1

As shown in Figure 1, liquid container 10 with have the cylinder bottom of liquid sucting valve 12 and be connected with liquid discharging valve 13, porous flower hurdle 14 is equipped with by screw thread in liquid discharging valve 13 outsides, between flower hurdle 14 and the liquid discharging valve 13 spring 15 that liquid discharging valve is compressed is housed, liquid container top is connected with the electromagnetic valve body that electromagnetic coil 2 and iron core guiding valve 4 are equipped with in its inside, have a solenoid valve water outlet 6 that communicates with liquid container top hydraulic chamber on the valve body, on the valve body of guiding valve 4 one ends, have drain opening 3, by bulge loop Returnning spring 5 is housed between drain opening and the guiding valve, on the valve body of the guiding valve the other end, have water intake 1, be equipped with in the liquid container seal ring 9 packed-piston 8 and and liquid container bottom between Returnning spring 11 is housed, during use solenoid valve is connected power supply, when solenoid valve is in running order, move on the guiding valve drain opening 3 sealings, this moment, water entered the liquid container formation hydraulic chamber 7 between the piston and liquid container top from water intake 1 through solenoid valve water outlet 6, and piston is pressed down liquid in the liquid container 10 is transported to specified containers through liquid discharging valve 13, when solenoid valve is in releasing state, guiding valve 4 moves down water intake is sealed, water is discharged from drain opening 3, pressure reduces to move on the piston in the hydraulic chamber 7, this moment, liquid entered liquid container through liquid sucting valve 12, reached accurate conveying liquid purpose so repeatedly.

Embodiment 2

As shown in Figure 2, liquid container 10 also can be by two cylinder body 10-1 that internal diameter is different, the 10-2 serial connection forms, a packed-piston 8-1 corresponding with its internal diameter respectively is housed in two cylinder bodies, 8-2, in the relative side of packed-piston a double-screw bolt 16-1 who is connected one with piston is arranged respectively, 16-2, two double-screw bolts fuse piston by nut 17, and distance is promptly regulated the liquid container volume between two pistons of can regulate, between piston 8-1 and cylinder body 10-1 bottom, Returnning spring 11 is housed, (also can be contained between 8-2 and the 10-2), its working procedure and other structure and embodiment 1 are together.This embodiment can realize that less pressure carries out the process that liquid is carried when importing, and when 10-1 in this example and 10-2 location swap, can realize carrying out the conveying of big quantity of fluid simultaneously with big pressure.

Magnet or projection 18 are equipped with in packed-piston side or lower end in embodiment 1 or embodiment 2, at liquid container body sidewall or bottom a magnetic switch or a sensitive switch 19 that is used for control electromagnetic valve is housed, solenoid valve is connected back piston and is moved down, when moving on to magnetic switch or sensitive switch position, magnetic switch or sensitive switch disconnect and make solenoid valve be in off working state.

Advantage of the present utility model and effect: 1, make control element with magnetic valve, realized that to " point " of pump and signal is moving, made things convenient for the control to pump, be convenient to realize automatic control process and simplify automation equipment; 2, accurate measurement is particularly suitable for tiny flow quantity and adds occasion; 3, the utility model is simple in structure, and cost is low, energy savings, and power resources are convenient, are suitable for the various occasions of any control signal such as time, flow or position signalling.

Claims

1, a kind of by having suction, the liquid container of liquid discharging valve, the pressure type valve control piston metering pump that packed-piston in the liquid container and control section thereof are formed, it is characterized in that described control section realizes by solenoid valve, be that the electromagnetic valve body that electromagnetic coil and iron core guiding valve are equipped with in its inside is connected with liquid container top, and have a solenoid valve water outlet that communicates with liquid container top hydraulic chamber on the valve body, on the valve body of guiding valve one end, have drain opening, between drain opening and the guiding valve Returnning spring is housed, on the valve body of the guiding valve the other end, have water intake, between packed-piston and liquid container bottom, Returnning spring is housed.

2, pressure type valve control piston metering pump according to claim 1, it is characterized in that liquid container also can be formed by two different cylinder body serial connections of internal diameter, the packed-piston that each other fuses corresponding with its internal diameter respectively is housed in two cylinder bodies, between packed-piston and cylinder base, Returnning spring is housed.

3, pressure type valve control piston metering pump according to claim 2 is characterized in that two relative sides of packed-piston a double-screw bolt that fuses with piston being arranged respectively, and two double-screw bolts fuse piston by nut, and can regulate the running length of liquid container.

4, metering pump according to claim 1 and 2 is characterized in that in the packed-piston side or magnet or projection are equipped with in the lower end, at liquid container body sidewall or bottom a magnetic switch or a little electric switch that is used for control electromagnetic valve is housed.