RU180300U1 - SPRING AND MAGNETIC VALVE-BLINDER - 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 (AMP) under the influence of the accumulating mass of fuel coming from the heat 10 . The shutter is made in the form of a funnel-shaped container 30 adjacent to the outlet end of the estrus 10 with a conical end. The wall of the container 30 is divided into at least two longitudinally wedge-shaped sashes 31, made of elastic synthetic material. The AMPS is made in the form of at least one radial guide element 32 attached to the upper part of the sash 31 from its inner side and made of ferromagnetic material and the corresponding number of magnets 33 attached to the wall from the outside of the estrus 10 in the form of an element corresponding to the guide, as well as tensile springs 34 fixed by the ends on the outside of adjacent flaps 31, and at least one spring 34 is provided at the location of each section between the flaps 31. Technical results: prevented ix clogging fuel valve, the density of the valve in the closed position the shutter, a relatively small and compact design of metal. 3 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;

- insufficient tightness of the system in the closed position of the shutter;

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

- low range of regulation of the amount of fuel at which the valve shutter opens.

Utility Model Disclosure

The objective of the patented utility model is to increase reliability and ensure high tightness of the emergency lamp, and the technical results are prevention of clogging of the valve with fuel, valve density when the shutter is in the closed position, compactness and relatively small metal consumption of the structure.

To solve this problem by achieving the specified technical results in a flasher valve installed on the outlet flow 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 the fuel estrus, according to the patented utility model, the shutter is made in the form of adjacent to the output end an unker chute of a funnel-shaped container with a conical end, and the diameter of the base of the indicated container exceeds the outer diameter of the estrus, the wall of the indicated container is divided into at least two longitudinal wedge-shaped shutters made of elastic synthetic material, and the indicated automatic shutter drive mechanism made in the form of at least one attached to the upper part of the specified sash from its inner side of the radial guide element from a ferromagnetic material and attached to the wall on the outside of the specified heat of the corresponding number of magnets in the form of an element that responds to the guide, as well as tensile springs fixed by the ends on the outside of the adjacent flaps, at least one of which is provided at the location of each section between the flaps spring.

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 funnel-shaped container, the walls of which are divided into several longitudinal wedge-shaped blades, provides a complete opening of the valve with a uniform distribution of fuel over its bore, thereby preventing the possibility of clogging with fuel.

The implementation of the automatic mechanism of the periodic shutter drive in the form of magnets and springs installed outside the fuel passage, returning the flaps to their original state, as well as the execution of the flap flaps from an elastic synthetic material, provides a high valve density when the shutter is in the closed position. The compactness and reduced metal consumption of the design of the flasher valve are ensured by eliminating the need to use a bulky and heavy lever-hinge system with counterweight to drive the shutter.

Brief Description of the Drawings

In FIG. 1 shows a general view of a flasher valve in a closed position; in FIG. 2 - general view of the flasher valve in the open position; in FIG. 3 is a perspective view of a flasher valve in an open position.

List of drawing items

10 - estrus; 20 - case; 30 - funnel-shaped container; 31 - shutter flaps; 32 - a directing element; 33 - springs; 34 - magnets.

Utility Model Implementation

The flasher valve is installed hermetically on the outlet chute 10 (Fig. 1) from the lump fuel supply hopper to the grinding mill of the boiler unit dust preparation system (not shown) and contains 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 estrus 10. The shutter according to the utility model is made in the form of a funnel-shaped container 30 adjacent to the outlet end of the estrus 10 with a conical end, the diameter of the base of the container 30 exceeding the outer diameter of the estrus 10, the wall of the indicated container 30 (Fig. 2) is divided in this example into four tightly fitting one to the other, longitudinal wedge-shaped sashes 31 made of an elastic synthetic material, for example, nylon. The specified automatic mechanism for the periodic drive of the shutter is made (Fig. 3) in the form of a radial guide element 32 (in this example, in the form of a rod) attached to the upper part of each leaf 31 from its inner side and of the corresponding number of magnets attached to the outer side of the estrus 10 33 in the form of an element responsive to the guide (in this example, a braid-shaped form), as well as tensile springs 34, fixed by the ends on the outer side of adjacent flaps 31 (in this example re on a spring in place of each section between the flaps 31).

The operation of the emergency valve according to the utility model is as follows:

Lump fuel from estrus 10 enters the funnel-shaped container 30 of the valve leaf shutter, while in the initial state, the valve leaf 31 is held closed by means of magnets 33, attracting guide elements 32 of the said leafs and springs 34 to the heatwall 10, connecting the adjacent leaflets 31 in pairs. magnets and springs can be adjusted by the mass of fuel passing through the flasher valve in one opening. When the weight of the fuel pressing on the leafs 31 exceeds the set resistance value of the indicated magnets and springs, the leafs 31 are moved apart (Figs. 2, 3), and the fuel enters the mill with the valve shutter completely open through passage. Further, under the action of magnets 33 and springs 34, the shutters 31 return to their original position, the valve shutter closes, and the cycle repeats.

Thus, having compactness and low metal consumption, the design of the emergency flasher according to the utility model ensures its reliable operation in terms of preventing the valve from clogging with fuel and triggering an automatic periodic shutter drive mechanism, the elements of which are located outside the fuel flow zone. The full opening of the valve shutter bore is achieved due to a sharp jerky break in the interaction of the magnets 33 and the guide elements 32 with a relatively weak resistance of the springs that finally return the valves 31 to their original state only after the resumption of the magnetic interaction between the elements 32 and 33.

An additional advantage of the shutter design of the flasher valve according to the utility model is its resistance to shock loads during possible pops in the mill due to the fact that the surface of the flaps 31 is at an acute angle to the direction of the blast wave, which reduces the load on the material of the flaps 31. In addition, the abutment of the upper parts of the shutter flaps 31 in estrus 10 prevent the blast wave from spreading further.

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 bulk fuel supply hopper to the grinding mill of the boiler unit dust preparation system, comprising a body with a periodic shutter placed inside it, equipped with an automatic drive mechanism under the influence of the accumulating mass of fuel coming from the heat, characterized in that the shutter made in the form of a funnel-shaped container adjacent to the outlet end of the bunker estrus with a conical end, the diameter of the base being indicated capacity exceeds the outer diameter of the estrus, the wall of the specified capacity is divided into at least two longitudinally wedge-shaped cuspid flaps made of elastic synthetic material, and the specified automatic mechanism of the periodic shutter drive is made in the form of at least one attached to the upper part the said sash from its inner side of the radial guide element of ferromagnetic material and attached to the wall from the outside of the specified estrus respectively Enikeev number of magnets in the shape of the element, the response guide, and the tensile spring fixed on the outer ends of adjacent side flaps, and in a place between the flaps of each section is provided with at least one said spring.

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