RU2406906C1 - Magnetic device of valve control - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: magnetic device of valve control is installed on fixed core of valve and includes permanent magnet and non-magnetic body, carriage, axis, return spring, rotary drive actuated externally. Permanent magnet fixed on carriage and arranged in a certain manner towards stop of fixed valve core so that magnetic field magnetises stop to the maximum, moves along trajectory with efficient change of magnetic field effect at stop, by change of permanent magnet flow direction without increase of friction forces in pair of fixed and movable cores sliding.

EFFECT: elimination of necessity to use power in valve control, increased reliability and safety in its operation.

11 dwg

Description

The magnetic valve control device is designed to control valves that shut off liquid and gas lines. The invention relates to the field of magnetic systems, in particular to the design of control devices besalnikovye shut-off valves with manual or remote mechanical, as well as pneumatic and hydraulic controls. They can be used as main or additional devices for existing electromagnetic systems where increased safety and reliability is required.

The closest in technical essence of the proposed magnetic device is a locking device according to SU 806965 A1, F16K 31/08, 02/23/1981.

Analysis of the existing analogue shows a number of disadvantages, namely, the control mechanism is located in the area of the working fluid, which significantly reduces its service life. Compressed air directly controls the shutter of the locking device by supplying it under pressure to the piston cavity of the cylinder. Through seals in the piston group, it can enter the working cavity of the locking device, and therefore, into the transported fluid, which indicates that the control mechanism does not ensure the tightness of the locking device. Permanent magnets perform the function of fixing, but not controlling, elements of the mechanism; the control mechanism itself cannot be transformed to another commercially available valve or shut-off device. In the description of the analogue it is indicated that it can be used in various kinds of air ducts, and therefore, cannot be used with more viscous fluids, such as water and light oil products, as well as a shut-off device, which does not allow to set the opening pressure range of the valve.

The objective of the invention is the use of a magnetic device instead of an electromagnetic coil to control commercially available sealless valves, without their modification with any transportable fluids specified in the technical documentation of the valve, as well as the operation of magnetic devices in any medium and their use as control devices. As a result of the implementation of this task, the reliability and safety of pipeline systems and tanks is increased, where the use of electricity is dangerous, impossible or inappropriate.

The task is achieved in that instead of an electromagnetic valve coil, a magnetic device is installed using a permanent magnet.

The technical result is the development of a device that allows you to replace the electromagnetic valve control system with a magnetic one. The specified technical result is achieved by creating a magnetic valve control device located on the fixed core of the valve and including a permanent magnet and a body made of non-magnetic material, a carriage, an axis, a return spring, a rotary drive driven by an external force. A feature of the invention is that the permanent magnet mounted on the carriage and definitely located relative to the stopper of the fixed core so that the magnetic field magnetizes the stopper as much as possible and moves along the path with an effective change in the influence of the magnetic field of the permanent magnet on the stopper of the fixed core, by changing the direction magnetic flux of a permanent magnet without increasing the friction forces in the slip pair of the movable and fixed cores.

The invention is illustrated by drawings, where in Fig.1 is a drawing of a valve without an electromagnetic coil in a normally closed position, Fig.2 shows the location of the permanent magnet (7), in which the magnetic field of the permanent magnet (7) magnetizes the stopper (3) as much as possible figure 3 is a view along aa of figure 2, figure 4 shows the location of the permanent magnet (7), in which the so-called middle line (C) of the neutral region of the permanent magnet (7) passes through the center of the stopper (3), stopper (3) is not magnetized; in FIG. 5 is a view along aa of FIG. 4; FIG. 6 shows an embodiment sectional view of a magnetic valve control device - top view, on a 1: 1 scale, and the path (E) of the permanent magnet (7) mounted on the carriage (9), Fig. 7 shows the construction of the magnetic device in the position of the permanent magnet (7) with maximum magnetization of the stopper (3), the valve state is open, Fig. 8 is a section along A-A in Fig. 7, Fig. 9 is a construction of a magnetic device in the position of a permanent magnet (7) with minimal magnetization of the stopper (3) the state of the valve is closed, figure 10 is a section along aa in figure 9, figure 11 is a magnetic device GUT assembly with the valve.

Figure 1 presents a drawing of a shut-off sealless valve, consisting of a fixed core (1), a movable core (2), a stopper (3), a return spring (4), a drive mechanism (5), a nut (6).

A magnetic valve control device located on the fixed core (1) of figure 1 of the valve and including a permanent magnet (7) of figure 7, as well as a body (8) made of non-magnetic material, a carriage (9), an axis (10), a spring (11), a rotary drive (12), which is driven by an external force F, characterized in that the permanent magnet (7), mounted on the carriage (9) and definitely located to the stopper (3) of the fixed core (1), is maximally magnetizing it, moves along the path (E) of Fig.6, with an effective change in the effect of magnetically field to the stopper (3), by changing the direction of the magnetic flux of the permanent magnet (7) of FIG. 2, FIG. 4, without increasing the friction forces in the sliding pair of the movable core (2) of FIG. 7, and the stationary core (1).

The device operates as follows. Figure 2 shows the location of the permanent magnet (7), in which the magnetic field of the permanent magnet (7) magnetizes the stopper (3) as much as possible. The magnetic flux of the permanent magnet (7) is directed to the stopper (3) and closes on the stopper (3). Figure 4 shows the location of the permanent magnet (7), in which the magnetic flux of the permanent magnet (7) is directed along the stopper, so that the middle line (C) of the neutral region of the permanent magnet (7) passes through the center of the stopper (3). From the middle line (C) drawn through the so-called neutral region of the permanent magnet (7), do not go out and do not include induction lines. Also, the permanent magnet (7) is removed from the stopper (3) by a distance (A), which is selected from the required minimum magnetization of the stopper (3) by a magnetic field near the midline (C) of the neutral region of the permanent magnet (7). The distance (A) is taken to be equal to or more than the thickness (B) of the permanent magnet (7), along which it is magnetized and ensures the magnetization of the stopper (3) to practically zero.

To perform the results of the interactions of the permanent magnet (7), FIGS. 2 and 4, a carriage (9) of FIGS. 6, 8 is used on the stopper (3), which definitely positions the permanent magnet (7) to the stopper (3), as shown in FIG. .2, FIG. 3, FIG. 4 and FIG. 5, and creates a path (E) of FIG. 6 of the permanent magnet (7).

The carriage (9), Fig.6, has an axis of rotation (10) offset from the center of the carriage (9), as a result of which the carriage (9) rotates, in which the permanent magnet (7) is definitely located to the stopper (3), moves along the stopper (3) along the path (E) of FIG. 6, with an effective change in the influence of the magnetic field of the permanent magnet (7) on the stopper (3).

The permanent magnet (7), Figs. 7 and 8, on the carriage (9) from the position where the magnetic field lines of the permanent magnet (7) of Fig. 2 are closed on the magnetic circuit of the stopper (3) and magnetize it as much as possible, as a result of which the movable core (2) Fig. 7, under the action of a magnetized stop (3), creates a force by compressing the return spring (4) of the movable core (2), is fixed to the stop (3), while the force created by the return spring (4) on the drive mechanism ( 5) figure 1, is equal to zero, the valve is open, is deployed by a rotary actuator (12) of figure 10 under the action of external force F. In this position, when the middle line (C) of the neutral region of the permanent magnet (7), where there is no influence of the magnetic field on the stopper (3), coincides with the center of the stopper (3), the permanent magnet (7) moves away from the stopper ( 3) at a distance (A). At this distance, the magnetic field of the permanent magnet (7), located near the center line (C) of the neutral region of the magnet (7), has a minimal effect on the stopper (3), while the magnetization of the stopper (3) is practically zero, which leads to the fixation of the movable the core (2) of FIG. 9 from the stopper (3), and the force of the return spring (4) on the drive mechanism (5) of FIG. 1 becomes calculated, the valve is closed.

Certain magnet locations are shown in FIGS. 2, 3, 4 and FIG. 5, and the path (E) of the permanent magnet (7) in FIG. 6.

The specific location of the permanent magnet (7) includes the requirements: a permanent magnet (7), FIGS. 3 and 5 should be located not lower than the level (D) of the stopper (3); the permanent magnet (7), figure 2, should be located symmetrically with respect to the stopper (3), to magnetize it as much as possible; the permanent magnet (7) of FIG. 4 must be removed from the stopper (3) by a distance (A) of not less than the width (B) of the permanent magnet (7) along which it is magnetized, and the middle line (C) of the neutral region of the permanent magnet (7) must coincide with the center of the stopper (3). A certain arrangement of the magnet (7), Figs. 2, 3, 4, 5, to the stopper (3) is caused not only by the requirement to achieve the maximum hysteresis of the magnetization of the stopper (3), but also by the requirement for the friction forces that can occur in the sliding pair of the movable the core (2) of FIG. 1 and the fixed core (1), as a result of a deviation from a certain location of the permanent magnet (7) to the stopper (3), namely, if the permanent magnet (7) is located below the level (D) of FIG. 3 stoppers (3) (in Fig. 3 the displacement of the permanent magnet (7) below level (D) is not shown) arose interaction forces between the permanent magnet (7) and the movable core (2) of FIG. 1, between which the stationary core (1) is located, in this case, friction forces arise in the sliding pair of the movable core (2) of FIG. 1 and the stationary core (1 ) A certain arrangement of the magnet (7), FIGS. 2, 3, 4, 5, and its movement along the path (E) of FIG. 6 with an effective change in the influence of the magnetic field on the stopper (3), as a result of which the maximum magnetization hysteresis of the stopper (3 ), allow to reduce the friction forces in the sliding pair of the movable core (2) of Fig. 1 and the non-movable core (1) to the magnitude of the friction forces arising in electromagnetic systems using an electromagnetic coil. An electromagnetic system using an electromagnetic coil is not shown in the drawings.

Figure 11 presents the device of the magnetic system assembly with the valve. The valve control device housing (8) is installed instead of the electromagnetic valve coil (13) (the electromagnetic coil is not shown in the drawing) and is fixed with a nut (6).

The magnetic valve control device is prepared for production, acceptance tests have been carried out. The magnetic valve control device was tested for reliability in conjunction with commercially available sealless valves of various models and manufacturers. The test results showed that after 640,000 cycles (open - closed) of the valve control by a magnetic device, the wear of the valve mechanism elements was less compared to the use of electromagnetic systems using an alternating current electromagnetic coil, due to the fact that the slip pair of the movable and non-movable cores the valve heats up during operation and experiences resonant oscillations with an alternating current frequency during switching on and operation.

Tests of the prototypes were carried out in a water supply system with a working pressure of 6 atm on serial two-way shut-off sealless diaphragm valves with conditional pass Du-15 and Du-20 of indirect action with forced raising of the diaphragm. With a working stroke of the movable valve core of 3.5 mm and a spring return force of 450 g on the diaphragm, a Nd-Fe-B (neodymium-iron-boron) permanent magnet of 42 × 32 × 10 mm and 38 × 28 × 10 dimensions was used, with a force of 190 MT The holding force of the movable core in the "valve open" mode of Fig. 7 is 8-9 kg. The residual magnetization of the stopper in the "valve closed" mode of Fig. 9 is practically equal to 0.

The operation of valve assemblies was also tested when testing a device with large permanent magnets and increased magnetization, namely 22 × 22 × 22 mm, magnetization — 230 mT, 25 × 27 × 20 mm, magnetization — 260 mT, 42 × 32 × 20 mm, the magnetization is 270 mT, and 40 × 40 × 23 mm, the magnetization is 320 mT. The results showed that the traction forces of the movable core increased without increasing friction in the sliding pair of the movable and non-movable cores, and the residual magnetization of the stopper (3) of Fig. 10 remained at the same level subject to a certain location of the permanent magnet (7) and depended on the accuracy combining the middle line (C) of the neutral region of the permanent magnet (7) of the carriage (9) with the center of the stopper (3).

Thus, this invention eliminates the need for the use of electricity in valve control, thereby improving reliability and safety during operation. The magnetic valve control device does not heat its body, and therefore, the fluid passing through it, which allows it to be used in any environment, as well as in aggressive ones. The magnetic valve control can be immersed in fluids of a certain viscosity. One of the significant advantages is that the device can be combined with pneumatic, hydraulic, mechanical control, and also allows you to set the pressure range of the valve to open. Installation of the device does not require structural changes to the valve, thereby not violating its tightness.

Claims (1)

A magnetic valve control device located on the fixed core of the valve and comprising a permanent magnet, and a body, carriage, axle, return spring, rotary drive driven by an external force made of non-magnetic material, characterized in that the permanent magnet is mounted on the carriage and definitely located to the stopper of the fixed valve core so that the magnetic field magnetizes the stopper as much as possible, moves along the path with an effective change in the influence of the magnetic field on stop, by changing the direction of the magnetic flux of the permanent magnet without increasing the friction forces in the slip pair of the movable and stationary cores.

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