Valve device

 

(57) Abstract:

Usage: in a valve, in particular for supplying pulses of compressed air into the vertically mounted elements of the filter bag in the filter plant for purifying contaminated gases. The inventive valve in the housing of the device is formed Luggage. The control valve is in the closed position, closes off the outlet from the chamber, and open opens it. Shut the main valve body is made in the form of a piston and located with a possibility of free movement in the input koltseobrazno-cylindrical part of the body. The inlet valve chamber formed annular gap between the surfaces of the piston and the housing. Length koltseobrazno-cylindrical part of the body provides coverage of at least the greater part of the piston in its closed position. 2 C.p. f-crystals, 2 Il.

The invention relates to a valve, in particular to a valve device, which serves for the supply of pulses in the system of the cleaning elements of the bag filter.

Known valve device for supplying compressed air pulses in the elements of the filter bag in the filter plant for purifying contaminated gases. Pulses Catania or shaking loose dust, which when cleaning contaminated gas is deposited on the walls of the filter elements. In this case, the valve device is installed on the compressed air. The wall of the compressed air is performed with a through hole through which the valve element of the main valve in the closing position is in sealing contact with the valve seat installed in the tank of compressed air at one end of the discharge nozzle. This pipe extends from a cylinder of compressed air, so that in the moment when the valve element is temporarily shifted in its domestic opening position, to transmit a pulse of compressed air into the interior of the filter element [1]

In the valve device according to the preceding technical level, the main valve has a circular membrane, sandwiched between the valve body and the wall of the can of compressed air, and closing the hole in the wall of the cylinder. Valve element attached to the outer side of the membrane. It is surrounded by a circular membrane, which has peritonei through holes, forming the entrance to the valve chamber and providing a connection between a can of compressed air and the valve chamber.

In the known valve device output is the when the control valve is in its closed position, and open when it is in the open position.

A disadvantage of the known device is the large number of parts, the possibility of destruction of the membrane in perechodnik holes, and susceptibility to corrosion of some structural elements in the environment that is known valve device.

Also known valve device containing and managing the main valves with shut-off body in the form of a piston moving in the input part of the body, made in the form of a cylindrical sleeve [2] In the known device the length of the housing surrounding the piston, not quite accurately the direction of its movement, that does not exclude the possibility of jamming of the piston during its movement.

The objective of the invention is to improve the reliability and durability of the valve device while simplifying its design.

The technical result is ensured by the fact that in the valve device, comprising a housing with a valve chamber having an outlet and inlet for connection with a source of working environment, control valve, provide the its in the input koltseobrazno-cylindrical part of the body, made in the form of a cylindrical sleeve, coaxially with it and with the formation of the annular gap with its inner surface, with the inlet valve chamber formed in the said gap, and a piston housed for movement in the valve chamber between the closed outer and inner open positions, according to the invention, the piston is made with a possibility of free movement in koltseobrazno-cylindrical part of the body, while koltseobrazno-cylindrical part of the body is long, providing coverage of at least the greater part of the piston in its closed position. In addition, the length of the said part of the housing may provide an opportunity for coverage of the piston along its length. Also, according to the invention, in the wall of the cylindrical sleeve at its end section can be made of the inlet for the working environment.

In Fig. 1 shows the proposed valve device in the closed position, the section of Fig. 2 the same in the open position, the cut.

Valve device shown in Fig. 1 and 2, is used for supplying compressed air pulses in the vertically mounted elements of the bag filter (not shown) in the filter station Dolneni in the upper part of the cylinder. In this case, the container 1 is a container of compressed air.

Vertical discharge pipe 3, coaxially with the hole 2, passes through the lower wall of a cylinder of compressed air in the cylinder and opens at a certain distance below the hole 2. The upper end of the pressure pipe 3 forms a valve seat 4, and its lower end 5 is open on the outside of the container 1 in order to connect with the holes of the elements of the filter bag.

The valve device has a valve body 6 made of aluminum, which consists of two annular coaxial parts, namely the upper part 7 and tubular, having an external thread of the lower part 8, which swiney together with the intermediate spacer elements (not shown). The sleeve 9 with internal thread into which is screwed the lower part 8, is welded around the circumference of the hole 2. The lower part 8 has an annular upper flange 10 in contact with the upper end of the sleeve 9, when the lower part is fully screwed into the sleeve. Between the bottom part 8 and the sleeve 9 is installed sealing ring 11.

The top item 7 on its lower side has a circular Cup-shaped recess 12, and the lower part 8 at its upper side has celeabrate is located between the two parts 7 and 8, being in annular sealing contact with the walls of the two recesses 12 and 13 (Fig. 1). The disk 14 may be curves upward into the position shown in Fig. 2, in which its sealing contact with the wall of the undercut 13 is temporarily halted, and formed an annular passage 15 between the inner part of the lower part 8, which forms a valve chamber 16 of the housing 6 of the valve, and the annular gap 17 formed by the spacer elements between the two parts 7 and 8. The gap 17 is connected with the outer part of the shell 6 of the valve.

Tubular lower part 8 has an upper portion 18 which is the recess 13, and koltseobrazno-cylindrical lower portion 19, the inner diameter of which is greater than the internal diameter of the upper part 18. Between the two parts 18 and 19 of the lower part 8 is made annular stop 20. Rubber strip 21 is attached to the plate 20 and is held in place using a plastic strip 22 that is installed with snap ring groove 23 in the inner wall part 19. This locking contact is provided with an annular groove 24, is made on the bottom side of the plastic strip 22 around its periphery. On the bottom side of the plastic strip 22 is also made many radial Kahn is aznoe longitudinal section, located in the lower part 19. The piston 26 is made of fiberglass and therefore has good thermal and corrosion resistance. The outer diameter of the piston 26 is slightly smaller than the inner diameter of the lower part 19 to provide an annular gap 27 between the piston 26 and the inner wall of the lower part 19. The gap 27, which is the purpose of clarity, shown in the drawings with the increased width provides a permanent connection between the interior of the pressure cylinder 1 and the valve chamber 16 and forms the inlet valve chamber. The piston 26 is a valve core valve device and can move freely between the outer end position in which it tightly adjacent to the valve seat 4 valve discharge nozzle 3 (Fig. 1) and the internal opening position (Fig. 2), in which he rises above the valve seat 4 and in which it is adjacent its upper end to the plastic liner 22, forming together with a rubber gasket 21 of the damping unit.

The upper part 7 is directed in the axial direction of the through hole 23, which represents an output of the undercut 12. The top item 7 at its upper side has a radial groove 29. The valve 30 with electrom is ogenyi connecting hole 28 and the groove 29 in the closed position to counteract this connection. In the closed position of the valve device (Fig. 1) the valve 30 with solenoid control is in the closed position. The disk 14 has peritonei through hole 31, which provides the connection between the recess 12 and the valve chamber 16. The disk 14 and the valve 30 with electromagnetic control together form a control valve of the valve device. At the lower end part 19 made many undercut 32, prevents throttling of the flow of compressed air from pressure tank 1 into the discharge pipe 3, when the main valve is open.

When it is necessary to open the valve device from the closed position shown in Fig. 1, to apply a pulse of compressed air is of short duration to the elements of the filter bag through the discharge pipe 3, the valve 30 with solenoid control is opened in order to connect the recess 12 with the surrounding atmosphere. Then the disk 14 and bend it into the position shown in Fig. 2. This opens the outlet valve chamber 16 formed by the passage 15 and the gap 17. Thereby the pressure in the valve chamber 12 is reduced so that the main valve is opened by forming a valve ale is m, consisting of a rubber gasket 21 and the plastic strip 22, and opens the upper opening of the pressure pipe 3.

When you need to close the valve device from the open position shown in Fig. 2, the valve 30 with solenoid control is closed, so that the recess 12 increases the pressure through the opening 31 in the disk 14. Then, the disk 14 is returned to its flat position (Fig. 1), in which the output 15, 17 of the valve chamber 16 is closed. Through the gap 27 and the radial grooves 25 on the bottom side of the plastic strip 22 in the valve chamber 16, the pressure again increases so that the main valve is closed.

As is evident from the drawings, koltseobrazno-cylindrical lower portion 19 passes down to the upper end of the discharge pipe 3, so that the piston 26, as can be seen in the axial direction, is surrounded by part 19 (part 8) and also when the piston is in its closing position. As a result, the piston 26 will be accurately guided during the whole travel, thus avoiding the risk of jamming.

1. Valve device, comprising a housing with a formed therein a valve chamber having an outlet and inlet for connection with a source of working environment, wie in the open position, and the main valve with shut-off body is made in the form of a piston located in the input koltseobrazno-cylindrical part of the body, made in the form of a cylindrical sleeve, coaxially with it and with the formation of the annular gap with its inner surface, with the inlet valve chamber formed in the said gap, and a piston housed for movement in the valve chamber depending on the pressure between the closed outer and inner open positions, wherein the piston is configured to move freely in koltseobrazno-cylindrical part of the body, while koltseobrazno-cylindrical part of the body is long, providing coverage of at least the greater part of the piston in its closed position.

2. The device under item 1, characterized in that koltseobrazno-cylindrical part of the body is long, providing coverage of the piston along its length in the closed position.

3. The device according to PP.1 and 2, characterized in that the wall of the cylindrical sleeve at its end section is made of the inlet for the working environment.

 

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