RU2436005C1 - Packless valve with mechanical remote control - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: packless valve with mechanical remote control consists of case of locking device and magnetic control device. The magnetic control device includes a permanent magnet and a case, axle, spring and a carriage made of non-magnetic material. The carriage is actuated with a cable. The cable is connected with a remote control panel and is displaced in an anti-friction casing by means of turn of a valve control handle actuated by a slight effort of an operator. The permanent magnet is secured on the carriage and is located relative to a stop of a stationary core, magnetising it in such way that effect of magnetic field to the stop of the stationary core is changed at its displacement. It results in changes of interaction force between the permanent magnet and the stop.

EFFECT: raised reliability and safety of pipeline systems, facilitating their control without electric power.

5 dwg

Description

The sealless valve with mechanical remote control is designed to shut off hot and cold water in residential and industrial premises, as well as air and gas lines.

The invention relates to the field of pneumohydraulic engineering, in particular to the design of sealless shut-off valves with mechanical remote control. They can be used as primary or secondary devices to existing shut-off systems where increased safety and reliability is required.

The closest in technical essence to the proposed valve is an electromagnetic valve controlled by an electromagnetic actuator (SU 1798577 A1, F16K 31/02, 02.28.1993). Analysis of the operation of existing common sealless hermetic valves shows a number of drawbacks, one of which is the need to use power supply, which reduces electrical safety and reliability during operation, the need to apply additional measures to protect the electromagnetic valve in rooms with high humidity, the lack of the ability to manually control the valve in case of emergency shutdown power supply, failure of the solenoid coil, control circuits, as well as the ability to occurrence of water hammer in the water supply system, in the case of using a large number of solenoid valves on one line, as a result of their simultaneous closure during an emergency power outage.

The objective of the invention is to increase the reliability and safety of pipeline systems using valves, as well as controlling them without using electricity, where the use of electricity is dangerous, impossible or impractical.

The problem is achieved in that instead of the electromagnetic coil of the valve, a device is installed in which a permanent magnet is located with a specific location relative to the fixed core and affecting the position of the movable core by changing the location of the magnetic field. The rotation of the magnet in the device is controlled mechanically from the remote control.

The technical result is the development of a glandless valve with a mechanical remote control without the use of electricity, for installation in a water supply system that allows you to shut off the water supply for a long time people are not in the room, as well as at night, when flooding the premises can lead to large material losses.

The specified technical result is achieved by creating a glandless valve with a mechanical remote control, consisting of a housing of the locking device and a magnetic control device, which includes a permanent magnet and a body made of non-magnetic material, an axis, a spring, a carriage, which is driven by a cable connected to the remote control control and moving in the antifriction shell by turning the valve control knob when exposed to insignificant physical force . A feature of the invention is that the permanent magnet is mounted on the carriage and is located in relation to the stopper of the fixed core magnetizing it as much as possible so that when it moves, the influence of the magnetic field on the stopper of the fixed core changes, as a result of which the interaction forces between the permanent magnet and stopper change.

The invention is illustrated by drawings, where Fig. 1 shows a valve without an electromagnetic coil in a normally closed position, Fig. 2 - a sealless valve with mechanical remote control, the valve position is open, Fig. 3 is a section along AA in Fig. 1. 2, in FIG. 4 - a sealless valve with mechanical remote control, the valve position is closed, in FIG. 5 is a section along AA in FIG. 4.

Figure 1 shows 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 valve core (1) of FIG. 2 is remotely controlled from the control panel (14) and includes a permanent magnet (7) and, made of non-magnetic material, a housing (10), an axis (8) , a spring (9), a carriage (11), which is driven by a cable (12) connected to the remote control (14) and moving in the antifriction shell (13) by turning the valve control knob (15) when exposed to insignificant physical force person. A permanent magnet (7) is mounted on the carriage (11) and is located to the stopper (3) of FIG. 2 of the fixed core (1) of the valve, so that the magnetic field magnetizes the stopper (3) as much as possible and moves along the path with an effective change in the magnetic field on the stopper ( 3), as a result of which the interaction forces between the permanent magnet (7) and the stopper (3) change.

Figure 2 presents the position of the permanent magnet, in which the stopper is magnetized, the valve is open. The device operates as follows. The permanent magnet (7) is mounted on the carriage (11) and rotates on the axis (8), mounted in the housing (10). The magnet is driven by a cable (12) connected to the remote control (14) and moving in the antifriction shell by means of insignificant physical strength of a person by turning the handle (15) of the valve control mode, and returns to its initial state by the spring (9) and force magnetic field of a permanent magnet (7) to the stopper (3) of the fixed core (1). This device makes it possible to definitely position and move the permanent magnet (7) along the trajectory with an effective change in the influence of the magnetic field on the stopper (3) of the fixed core (1), in which the movable core (2), under the action of the magnetized stopper (3), with a constant magnetic field magnet (7), creates a force by compressing the return spring (4) of the movable core (2), snapping to the stopper (3), while the force created by the return spring (4) on the drive mechanism (5) is zero.

Testing of samples prepared for production was carried out on a test bench with a pressure of 12 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 650 g on the diaphragm, a permanent magnet of the Nd - Fe - B alloy (neodymium - iron - boron) was used, 34 × 28 × 10 mm in size, with a power of 190 mT. The holding force of the movable core in the "valve open" mode of figure 2 is 8-9 kg The residual magnetization of the stopper in the "valve is closed" mode of Fig. 4 is practically 0. The operation of the 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, magnetization 270 mT, and 40 × 40 × 23 mm, magnetization 320 mT. The results showed that the traction forces of the movable core increased without increasing the friction forces in the sliding pair of the movable and stationary cores, and the residual magnetization of the stopper in the position of the carriage of Fig. 4 remained at the same level and depended on the accuracy of the location of the carriage to the stopper.

Samples were subjected to 640,000 switching cycles (open-close), wear in the slip pair of the movable and stationary valve cores was not observed.

A prototype sealless valve with mechanical remote control was installed in the bathroom of the living room after the main valve of the central water supply line, which is usually located in an uncomfortable place. Repeated use of the valve quickly wears out the packing glands, and in the case of prolonged non-use of the valve, it is not always possible to close it.

The glandless valve is controlled by a remote control that is installed in a convenient location. The use of the valve can be made many times every day, since the technical resource of serial diaphragm valves is very large and amounts to more than a million cycles. As tests of magnets made of an alloy Nd - Fe - B (neodymium-iron-boron) show, their guaranteed service life is at least 10 years.

The economic and moral gain from the invention is determined by the quantity and value of material assets in residential, industrial and other facilities saved from flooding by applying the proposed technical solution.

Thus, this invention eliminates the need for the use of electricity in valve control, thereby improving reliability and safety during operation. Implementation of the proposed method for preventing flooding as a result of a malfunction of the water supply network and the hydraulic shocks arising in them provides effective protection for people, residential, industrial and other objects from the negative effects of water, and will also provide significant savings in material and financial resources of each citizen and the state as a whole.

Claims (1)

A sealless valve with mechanical remote control, consisting of a housing of a locking device and a magnetic control device including a permanent magnet and a body, an axis, a spring, a carriage made of non-magnetic material, which is driven by a cable connected to a remote control and moving in antifriction shell, by turning the valve control knob when exposed to a slight physical strength of a person, characterized in that the permanent magnet is fixed to the square and is located in relation to the stopper of the fixed core, magnetizing it as much as possible so that when it moves, the influence of the magnetic field on the stopper of the fixed core changes, as a result of which the interaction forces between the permanent magnet and the stopper change.

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