RU180299U1 - HOSE VALVE WITH HOSE BUTTERFLY - Google Patents

Abstract

Scope: heat power engineering. The flasher valve installed on the outlet heat from the bulk feed hopper into the grinding mill of the boiler unit dust preparation system comprises a housing 20 with a periodic shutter inside it equipped with an automatic drive mechanism under the influence of the accumulating mass of fuel coming from the heat 10. The valve body 20 is made in the form of a cylindrical shell connected in the upper part to the indicated heat 10 by an annular flange connector 11, and the shutter is in the form of a stocking 30, the upper part of the stocking is stretched and fixed between the flanges of the joint 11. In the annular space between the stocking 30 and the body 20 a device narrowing said stocking is provided in the form of a toroidal, closed, hollow, inflatable chamber 40 of elastic elastic material attached to the stocking 30. The chamber 40 is in communication with a source of compressed air located outside the valve and a valve for automatically discharging it from the specified chamber at predetermined intervals. Technical results: prevention of clogging of the valve with fuel, a significant reduction in the metal consumption and dimensions of the valve, the range of regulation of the mass of fuel at which the valve shutter opens. 2 ill.

Description

Technical field

The utility model relates to the field of thermal energy and can be used in dust preparation systems of thermal power plants operating on solid fuel.

State of the art

When operating a dust preparation system for coal-fired boilers, it is important to ensure the integrity of the installation. This is due to the fact that increased suction in the tract lead to a deterioration in the efficiency of the drying-mill system and to a violation of the conditions for its safe operation. To ensure the tightness of the dust preparation systems at TPPs, flasher valves installed on coal chutes are used.

Known adopted as a prototype of a patented utility model, a flasher valve mounted on the outlet heat from the lump fuel supply hopper to the grinding mill of the boiler unit dust preparation system, comprising a housing with a periodic shutter placed inside it, equipped with an automatic drive mechanism under the influence of the accumulating mass coming from fuel heat (SU 1495577 A1 of 07.23.1989) [1]. According to [1], the valve shutter is made in the form of one flat leaf (lobe) connected via a rotary axis with counterbalanced loads, and the shutter rotation mechanism is equipped with two locks that provide a sharp opening and closing of the shutter in order to prevent sticking fuel passing on it.

The disadvantages of the flasher valve according to [1] include the following:

- low maintainability of the structure;

- complexity of installation;

- cumbersome design and, accordingly, increased metal consumption;

- uneven (cross-section) pouring of fuel when the valve is opened, which can lead to clogging of the valve with fuel;

- low reliability due to the complex kinematic pattern of operation of the lock latches, located also in the area of possible contact with the fuel;

- low fuel mass control range at which the KM shutter opens

Utility Model Disclosure

The objective of the patented utility model is to increase the reliability of operation, and the main technical results are the prevention of clogging of the valve with fuel; additional technical results include a significant decrease in the metal consumption and dimensions of the valve, as well as an increase in the range of regulation of the mass of fuel at which the valve shutter opens.

To solve this problem, by achieving the indicated main technical results in a flasher valve installed on the outlet heat from the bulk fuel supply hopper to the grinding mill of the boiler unit dust preparation system, which contains a housing with a periodic shutter placed inside it, equipped with an automatic drive mechanism under the influence of accumulating masses of fuel from heat

according to patentable utility model

the valve body is made in the form of a cylindrical shell connected in the upper part to the indicated estrus by an annular flange connector, and the shutter is in the form of a stocking with a diameter of 0.5 ... 0.6 from the internal diameter of the body and a length of 0.8 ... 0.9 from the length of the latter the stocking is made of a composite woven fabric based on wear-resistant polymers; the upper part of the stocking is stretched and fixed between the flanges of the specified flange connection; from the place of fixing the stocking at a distance of 0.5 ... 0.7 of its length in the annular space between it and the body, a narrowing stocking device is provided in the form of a toroidal, closed, hollow, inflatable chamber made of elastic material connected to the specified stocking, connected with elastic material a source of compressed air located outside the valve and a valve for its automatic release from the chamber at predetermined intervals.

A causal relationship between the totality of the features of a patentable utility model and the technical results achieved is as follows. The implementation of the shutter in the form of a stocking provides complete opening of the valve with a uniform distribution of fuel over its bore, thereby preventing the possibility of clogging with fuel. The compactness and reduced metal consumption of the flasher valve design are ensured by the shutter in the form of a stocking made of lightweight composite woven fabric based on wear-resistant polymers, as well as by the introduction of a narrowing device in the form of a toroidal, closed, hollow, inflatable chamber made of elastic material that eliminates the need use for the shutter drive of a bulky and heavy lever-cargo system. The increase in the range of regulation of the fuel mass, at which the valve shutter opens, is ensured by the possibility of a corresponding change in the pressure of compressed air in the specified chamber.

Brief Description of the Drawings

In FIG. 1 schematically shows a general view of a portion of a dust preparation system with a hopper chute and a flasher valve mounted on it according to a utility model with the valve shutter closed; in FIG. 2 - the same with the valve shutter open.

List of drawing items

10 - estrus; 11 - flange connection; 20 - valve body; 30 - stocking; 40 - an inflatable chamber.

Utility Model Implementation

The flasher valve is installed hermetically on the outlet heat exchanger 10 (Fig. 1, 2) from the bulk fuel supply hopper to the grinding mill of the boiler unit dust preparation system (not shown) and contains a housing 20 attached to the indicated heat through a flange connection 11 with a shutter placed inside it periodic action, equipped with an automatic mechanism for its drive under the influence of the accumulating mass coming from estrus 10 fuel. The valve body 20 is made in the form of a cylindrical shell connected in the upper part to the indicated estrus 10 by an annular flange connector, and the shutter is in the form of a stocking 30 with a diameter of 0.5 ... 0.6 from the inner diameter of the body 20 and a length of 0.8 ... 0.9 from the length of the latter, wherein said stocking 30 is made of a composite woven fabric based on a wear-resistant polymer, for example carbonite; the upper part of the stocking 30 is stretched and fixed between the flanges of the specified flange connection 11. From the place of stocking of the stocking at a distance of 0.5 ... 0.7 of its length in the annular space between it and the body there is a device narrowing the specified stocking in the form of glued to the specified stocking 30 on the surface the contact of the toroidal, closed, hollow, inflatable chamber 40 of elastic elastic material. The specified chamber 40 is glued to the stocking 30 with a terokal 2444 polychloroplane composite adhesive. Tubes (not shown) are passed through the wall of the housing 20 from two diametrically opposite sides of the horizontal plane of symmetry of chamber 40 to supply compressed air to and from the chamber. A non-return valve (nipple) is installed at the inlet to the compressed air supply pipe from an appropriate source (for example, a line or a special pump), and a valve equipped with a drive controlled by an automatically operating periodic opening device is installed on the exhaust pipe from the compressed air chamber outside the housing 20 and closing the valve at predetermined intervals (not shown).

The operation of the emergency valve according to the utility model is as follows. Compressed air from an appropriate source is supplied through a nipple and an air supply tube to the inflatable chamber 40, which expands and compresses the stocking. At the moment of compression of the stocking, the cross section for the passage of fuel decreases, and coal accumulates at the pinch point. After a certain period of time, the value of which is determined at the stage of valve commissioning, the valve is activated, equipped with a drive controlled by an automatically working device for periodic opening and closing of the valve. In this case, the stocking is unclenched, creating a section for the passage of coal, and the established dose of fuel passes down to the mill. Then the described sequence of actions is repeated.

Industrial applicability

Flasher valve according to the patented utility model meets the condition of "industrial applicability". The essence of the technical solution is disclosed in the formula, description and figures of the drawing is sufficiently clear for understanding and industrial implementation by relevant specialists on the basis of the current level of technology in the field of heat power.

Claims (1)

Flasher valve installed on the outlet heat from the lump fuel supply hopper to the grinding mill of the boiler unit dust preparation system, comprising a housing with a periodic shutter placed inside it and automatically opening under the action of the weight of fuel accumulating on it, characterized in that the valve body is made in the form a cylindrical shell connected in the upper part to the indicated estrus with an annular flange connector, and the shutter is in the form of a stocking with a diameter of 0.5 ... 0.6 from the inner diameter of the housing and a length of 0.8 ... 0.9 from the length of the latter, and the specified stocking is made of a composite woven fabric based on wear-resistant polymers, the upper part of the stocking is stretched and fixed between the flanges of the specified flange connection, from the place of stocking fixing at a distance of 0.5 ... 0, 7 of its length in the annular space between it and the body, a narrowing stocking device is provided in the form of a torus-shaped closed hollow inflatable chamber made of elastic material, glued to the specified stocking on the contact surface, in communication with laid outside the valve by a source of compressed air and a valve for its automatic release from the chamber at predetermined intervals.

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