RU155280U1 - DRAIN VALVE WEIGHTED VISCOSE DISPENSER - Google Patents

Abstract

1. A drain valve for a viscous fluid weighing batcher containing a seat, a fluoroplastic locking element, a cross member, traction with springs, characterized in that the saddle is made in the form of a cylindrical body with an internal conical seating surface, the locking element is made in the form of a glass with a conical skirt at the bottom and two diametrically located symmetrical holes in the form of grooves at the bottom, and the glass has a guide protrusion on the outside of the bottom, through the diametral groove of which there is a cross member, which Shackle rod with springs biases the skirt of the closure element against the valve seat, the cross axis located in the plane of symmetry of the closure member, perpendicular to the plane of symmetry of the locking grooves elementa.2. The viscous fluid weighing valve drain valve according to claim 1, characterized in that the cross member interacts with a non-contact valve of the open position of the valve, which is mounted on the base of the dispenser and does not have a mechanical connection with the weighing device of the dispenser, by means of a strap fixed to the rod.

Description

The utility model relates to the field of discrete weight dosing of viscous and pasty liquids.

Dosing liquid is a mixture of a polymer binder with a powdery filler. Such a liquid, depending on the composition and properties of the components, has a viscosity of 10 to 200 Pa · s (100 to 2000 Poise).

The known design of the drain valve of the weight dispenser according to the patent No. 2348017 of the Russian Federation publ. 02/27/2009. Through the drain valve, a dose is dispensed from the load receiving hopper of the weight batcher. The valve feature is that it does not have a separate drive - it is opened by the pressure of the dosed liquid when the screw of the screw installed in the load hopper is turned on and the dose is dispensed, and it closes under the action of the springs when the screw stops after the dose is issued. This valve design allows you to have only one actuator in the dispenser - an auger drive motor. In this case, the power supply to the engine is provided by a flexible cable, which allows for high sensitivity of the weighing system, on which the load-receiving hopper of the dispenser is located together with the auger drive. The locking element of the drain valve is made in the form of a plate, which, through the cross member in the form of a flat bar, interacts with the spring unit for closing the valve. In the closed state, the plate is pressed by springs to the end face of the outlet of the load receiving hopper. The outlet end face is a valve seat and has pointed edges with which it contacts the plate, blocking the outlet opening of the load hopper when the dose of liquid is stopped.

The known design of the drain valve of the weight dispenser according to the patent for utility model No. 136566 publ. 01/10/2014, characterized in that:

- the locking element is made of fluoroplastic in the form of a cone, the diameter of the saddle of which is 0.90 ... 0.95 of the diameter of the base;

- the cross member is made in the form of a thin vertical plate with a pointed upper edge.

The drain valve according to patent No. 136566 adopted as a prototype.

The disadvantage of this valve is the following. During the dose dispensing operation, a viscous liquid spreads over the entire surface of the cone and cross member, and after the dispensing is stopped, it flows off these surfaces for a long time, making it difficult to final dose formation, increasing the dispensing error, delaying the dispensing cycle time and thereby reducing productivity dispenser.

The technical problem to be solved by the proposed utility model is to increase the accuracy of dosing and increase the performance of the dispenser by reducing the amount of dosed liquid adhering to the outer surfaces of the drain valve during dose delivery. The external surfaces of the drain valve are the visible external surfaces of the valve when closed.

The technical result is achieved by the fact that the drain valve of the weight dispenser of a viscous liquid contains a seat, a locking element, a cross member, traction with springs. Wherein:

- the saddle is the lower conical edge of the cylindrical valve body, which is attached with the upper flange to the lower flange of the load hopper;

- the locking element is inserted into the housing and is made in the form of a fluoroplastic cup with two diametrically located symmetrical holes in the form of grooves at the bottom for draining the liquid, with a conical skirt at the bottom for interaction with the saddle and with a guide protrusion located on the outside of the bottom;

- a cross-member, the lateral rods of which, moving in guides mounted on the flange of the housing, equipped with tips, are inserted into the diametral groove of the guide protrusion of the locking element, while the axis of the cross-section is located in the plane of symmetry of the locking element perpendicular to the plane of symmetry of the grooves of the locking element, which excludes the contact of the cross-member with liquid flowing from the slots of the locking element;

- springs, relying on the base of the guides from below and the ends of the rods of the cross member from above, by means of the cross member, press the skirt of the locking element to the saddle.

In addition, the drain valve is equipped with a non-contact valve open position sensor, which, interacting with the cross member by means of a bar fixed on the rod during delivery, signals that the liquid stream does not touch the valve body. The sensor is mounted on the base of the dispenser and is not mechanically connected to the weighing device, i.e. does not affect its sensitivity.

The proposed utility model is illustrated by figures 1, 2, 3 and 4.

In FIG. 1 schematically shows a section of the drain valve of a viscous fluid weighing batcher in a closed position by the plane of symmetry of the locking element. In FIG. 2 schematically shows a section of the drain valve in the open position by the plane of symmetry of the grooves of the locking element. In FIG. Figure 3 shows the mating of the seat and skirt in the closed position of the drain valve. In FIG. 4 shows the location of the seat, skirt and groove in the open position of the drain valve.

Where: 1 - saddle body;

2 - locking element;

3 - cross-member;

4 - guide;

5 - spring;

6 - load receiving hopper;

7 - auger;

8 - level;

9 - sensor open valve position;

10 - groove of the locking element for draining the liquid;

11 - seating surface of the saddle; 12- skirt of the locking element;

13 - thrust tip;

14 - guide protrusion of the locking element.

The drain valve of the viscous liquid weight dispenser is made in the form of a cylindrical body 1 having a mounting flange in the upper part and a cone-shaped seat 11 in the lower part. Guides 4 are installed on the upper flange of the housing 1. A locking element 2 is inserted in the housing 1, made in the form of a fluoroplastic cup, the skirt 12 of which abuts the saddle 11, while the cylinder of the housing closes two diametrically located symmetrical grooves 10 in the cylinder of the cup, which are designed to drain liquids. On the outside of the bottom of the glass there is a guide protrusion 14, through the diametric groove of which a cross member 3 passes, made in the form of a bracket, the lateral rods of which pass through the guides 4 and end with heads 13. The springs 5, resting on the base of the guides 4 from below and on the ends of the rods of the cross member from above , press the locking element 2 against the housing 1 by means of the cross member 3. At the end of one of the cross member rods, a strap 8 is fixed, by means of which the cross member interacts with the proximity sensor 9. When the locking element 2 is pressurized fluid is moved so that the fluid jets are not relate to the body 1, a sensor 9 forms an open valve position signal.

The drain valve operates as follows. To issue the next dose of liquid from the load hopper 6, the drive of the screw 7 is turned on. The screw 7 pumps the liquid, creating pressure on the shut-off element 2 of the drain valve. Overcoming the force of the springs 5, the locking element 2 moves from the saddle 11, while opening the fluid exit from the load hopper 6 through the slots 10 of the locking element and the sensor 9 is triggered. The fluid delivery is continuously monitored by the weighing device and, when the set dose weight is reached, the screw drive 7 is turned off, the pressure on the locking element 2 is reset. Under the action of the springs 5, the skirt 12 of the locking element 2 is pressed against the saddle 11 by the cross member 3, blocking the liquid outlet from the load receiving hopper 6 - the drain valve closes. After that, the next portion of liquid is fed into the load hopper 6 and, in accordance with the dispenser operation algorithm, the next dose is dispensed from the load hopper 6. The cycle of the drain valve is repeated.

The draining of fluid from the parts of the drain valve after it is closed is practically impossible, since the diameter and taper of the seat 11 are equal to the diameter and taper of the skirt 12 of the locking element 2 and all surfaces of the saddle and locking element wetted by the liquid at the time of delivery are in contact after closing the valve.

Claims (2)

1. A drain valve for a viscous fluid weighing batcher containing a seat, a fluoroplastic locking element, a cross member, traction with springs, characterized in that the saddle is made in the form of a cylindrical body with an internal conical seating surface, the locking element is made in the form of a glass with a conical skirt at the bottom and two diametrically located symmetrical holes in the form of grooves at the bottom, and the glass has a guide protrusion on the outside of the bottom, through the diametral groove of which there is a cross member, which Shackle rod with springs biases the skirt of the closure element against the valve seat, the axis of the cross member located in the plane of symmetry of the closure member, perpendicular to the plane of symmetry of the grooves of the locking element. 2. The drain valve of the viscous liquid weighing batcher according to claim 1, characterized in that the cross member interacts with a non-contact valve of the open position of the valve, which is mounted on the base of the batcher and does not have a mechanical connection with the weighing device of the batcher, by means of a strap fixed on the rod.

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