SU1597565A1 - Liquid flowmeter - Google Patents

Abstract

The invention relates to a device for measuring fluid flow. The aim of the invention is to increase the reliability of operation. When the flow of fluid in one of the cavities of the cylinder moves the piston. Fluid from the other cavity through the movable distribution valve enters the discharge line. The operation of two cylinders with pistons through movable distribution valves allows the process of measuring the flow rate of a fluid to be ensured. 2 hp f-ly, 3 ill.

Description

The invention relates to volumetric-type flow measurement devices and can be used in the chemical, gas and other industrial sectors.

The goal of the acquisition is to increase reliability at low cost, as well as expand functionality.

Figure 1 shows a diagram of a device for a flow meter with two-way five-way spools; figure 2 - cylinder, diametrically-axial section; in FIG. 3, view A in FIG. 2.

The liquid flow meter comprises two cylinders 1 and 2, inside of which pistons 3 and 4 are located with shanks 5. Shanks 5 have stops 6 and 7, which interact with cranks 8, which are fixedly connected with rotary shafts 9; The rotary shafts 9 p are installed directly in the cavities of the cylinders 1 and 2. The ends of the shafts 9 through the seals 10 are brought out to interact with the spools 11 and 12. The spools 11 and 12 have separate housings 13 and 14 (in the particular case can be made in one case ). Channels 15-19 are provided in housing 13, and 20 to 24, respectively, in housing 14. Channels 15 and 20 are interconnected and have a common input. The channels 16 and 19 of the spool 11 are connected to the cavities of the cylinder 2, the channels 21 and 24 of the spool 12 are connected to the cavities of the cylinder 1, and the channels 17, 18 and 22 23 are led outside.

On the working surface of the fixed bodies 13 and 14 of the spools 11 and 12, there are movable control valves 25 and 26. The valves 25 and 26 are connected to the rotary shafts 9, respectively, cylinders 1 and 2.

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The surfaces of the valves 25, and 26, which are turned to the building, are made of closed box-shaped channels 27. And 28 are the opornically connecting channels of the bodies j 13 and 14, and on the side surface there is a figured cut that performs the same function. From spontaneous rotation, valves 25 to 26 together with pivoting shafts 9 are held by retainers 29. One of the spool channels, for example, channel 24, can be connected to the cylinder cavity through throttle 30 and reverse valve 31.

At least of the pistons cylinder | 5 and 1, for example, piston 3, has a built-in permanent magnet 32, which interacts through a non-magnetic end of cylinder 1 with a magnetically controlled contact 33 connected to a reading device of control unit 34. Pistons 3 and 4 have central rods 35 brought out through seals 36 to the outside. The liquid enters the device from the tank 37 with the help of 25 pump 38 through the solenoid valve 39 connected to the control unit 34.

The flow meter works as follows ..30

The fluid from the tank 37 under the action of the pump 38 flows through the solenoid valve 39 to the inlets 15 and 20 of the spools 11 and 12. On the channel 24 of the spool 12, the medium flows through the pipeline and the throttle 30 (the check valve 31 is closed) enters the right cavity of the upper cylinder 1 and presses the piston 3 to the left end of the cylinder. At this point, the emphasis -6 on the shank of the 5 pistons. 3 acts on the crank 8 of the rotary shaft 9 and holds it in this position. Connected to the shaft 9 of the control valve 25 box-shaped channel 28 communicates between the channels 16 and 17 of the valve 11, and the other box. The channel 27 locks the channel 18. The latch 29 with its spring force also holds the valve 25 and the associated rotary shaft 9 with the crank 8 in this position.

At the same time, the fluid through the channel 19 and the pipeline enters the left cavity of the lower cylinder 2 and moves: piston 4 from left to right, thereby drawing fluid from the right cavity of cylinder 2 through channel -16 of the spool 11 into the drain line 17. Since piston 4 start moving

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from the same position as the piston .3 at the moment, it moves freely for a certain period of time, without affecting the crank 8 of the rotary shaft 9 belonging to the cylinder 2, and the distribution box 26 associated with it it is also held in position by the latch 29. Consequently, the switching of the fluid flows during the movement of the piston 4 until it touches the support 7 of the crank 8 will not change. After the emphasis on the shank 5 of the piston 4 begins to act on the crank 8 the rotary shaft 9, the retainer 29 will operate and the valve 26 connected to the shaft 9 will begin to turn clockwise.

There are individual moments of rotation of the valve 26 at an angle corresponding to the angle of rotation of the crank 8 and the associated changes in the flow of fluid through the spool 12. There are two such moments. The first point is that valve 26 closes channel 24, channel 20 is constantly open, and channel 21 is not yet open. This is the neutral position of the five-way valve, which is intermediate for these devices (as a transitional process) and therefore the valve is conventionally called two-way.

When the channels 24 and 21 are completely closed, the piston 3 of the upper cylinder .1 continues to remain in place, and the lower one continues the specified movement, as it is controlled by the valve 11, which also remains in the position fixed by its latch 29. Valve-shaped channels 27 and 28 26 at this moment, channels 22 and 23, as it were, cover lock them up, not yes, do it communicate with other channels.

The second point is that the channel 21 starts to open slightly, immediately the box-shaped channel 27 on the inner surface of the valve 26 starts the communication channel 23 and 24, the channel 20 is open, and the channel 22 is closed by the box-shaped channel 28.

Fluid from channel 20 through channel 21 and the pipeline begins to flow into the left cavity of the upper cylinder 1. Under the action of fluid pressure, piston 3 moves off and begins to move from left to right, squeezing the fluid through

check valve 31, pipeline and channels 24 and 23 of spool 12 to drain. The throttle 30 at this point does not slow down, since the main flow goes through the valve 31.

1597565.

The operation of the flow meter in the mode of liquid dispensing is similar to that described. The difference is. that, by varying the output lines, it is possible to dispense the liquid through separate channels or to drain one point from some other way, because the path that is needed is

you need to go through the piston 3 cylinder 1,

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On the crank of the rotary shaft 9 and the valve 25 of the spool 11 connected with it, is much longer than the way to be done by the valve 26 of the spool 12 to turn to full OPEN channel 21, respectively, complete communication of channels 24 and 23, i.e. . to actually travel a path equal to the diameter of the opening of the channel 21 or 24 (they are made equal), 20 then piston 4 will finish the rest of its path earlier. It will stop in the extreme right position, having fully rotated the valve 26 of the spool 12 to the second position fixed by the latch 29.

With fully open channel 21 and full communication, channels 23 and 24 of spool 12, the upper piston 5 will move to the right extreme position and stop. The valve 25 of the spool 11 will perform the same order of motion as the valve 26 of the spool 12. After the piston 3 stops in the right extreme position, the spool 11 becomes on the position of complete communication of the channels 15 and 16, 18 and 19 fixed by its retainer 29 With the closure of channel 17.

After that, the piston 4 of the lower cylinder 2 comes into motion, and after it stops in the left extreme position - the piston 3 of the upper cylinder 1. The piston 3 of the upper cylinder 1 moves from right to left due to the flow of fluid into the cylinder through the channel 24 of the spool 12 and the throttle body Sel 30 (valve 31 automatically closes). The throttle 30 is adjusted to the desired flow rate so that the piston 3 squeezes out fluid from the left cavity of the cylinder 1 along the drain line 22 at a specified time.

The flow meter operation cycle ends by stopping the piston 3 of the upper cylinder 1 in the leftmost position. The effect of the magnet 32 on the magnetoshaped contact 33 is fixed by the reading device of the control unit 34 i-i.

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cylinders of different volumes, you can also change the amount of fluid injected.

The operation of the flow meter in the engine mode is also similar to the operation in the flow measurement mode. The difference is that at least one rod 35, brought out through the seal 36, interacts through a kinematic connection with the drive mechanism or directly with objects, for example, in the case of their movement on the conveyor.

Claims (3)

1. Liquid flow meter containing fluid inlet and fluid channels, two cylinders with separating pistons and spool assemblies, each of which consists of a fixed housing and a movable distribution valve, and the inlet and outlet channels of the medium through the movable spool valve are connected by hydraulic lines to each of the internal cavities of the cylinders formed by separating pistons, characterized in that, in order to increase reliability and prevent environmental pollution, separate nye pistons configured shanks, imeyushih 1mi stops and located inside the cylinder in which plunger has nodes movable control valves which are fixed to rotating shafts on each crank having the ability to interact with stops shanks. 50 2. The flow meter according to claim 1, characterized in that the spool-type units are made with two separating lines each, the cylinders 55 have different volumes, and at least one of the hydraulic lines connecting the spools to the cylinders are installed in parallel with a throttle valve. and check valve. to 1597565. The operation of the flow meter in the mode of dispensing a liquid is similar to that described. The difference is. that vari 25 thirty -ABOUT 20 35 0 five cylinders of different volumes, you can also change the amount of fluid injected. The operation of the flow meter in the engine mode is also similar to the operation in the flow measurement mode. The difference is that at least one rod 35, brought out through the seal 36, interacts through a kinematic connection with the drive mechanism or directly with objects, for example, in the case of their movement on the conveyor. Invention Formula 1. Liquid flow meter containing fluid inlet and fluid channels, two cylinders with separating pistons and spool assemblies, each of which consists of a fixed housing and a movable distribution valve, and the inlet and outlet channels of the medium through the movable spool valve are connected by hydraulic lines to each of the internal cavities of the cylinders formed by separating pistons, characterized in that, in order to increase reliability and prevent environmental pollution, separate nye pistons configured shanks, imeyushih 1mi stops and located inside the cylinder in which plunger has nodes movable control valves which are fixed to rotating shafts on each crank having the ability to interact with stops shanks. 2. The flow meter according to claim 1, characterized in that the spool-type units are made with two separating lines each, the cylinders 55 have different volumes, and at least one of the hydraulic lines connecting the spools to the cylinders are installed in parallel with a throttle valve. and check valve. 3. The flow meter according to claim 1, about t l and -or two rods brought out This is due to the fact that at the ends of the cylinders. least one of the pistons is equipped with one - J / J-. 1 | And FIG. 2 3131 Fig.Z