CN219472756U - Flue valve adopting labyrinth seal - Google Patents

Abstract

The utility model provides a flue valve adopting labyrinth seal, and relates to the technical field of flue valves of waste gas and flue gas. The flue valve comprises a valve plate, a valve body, a limiting plate and the like, at least one seal is fixed on the limiting plate and/or the valve plate respectively in the overlapping area of the limiting plate and the valve plate, the seals on the limiting plate and the valve plate can be staggered or overlapped, gas phase in a pipeline or gas phase outside the pipeline can leak or be sucked through the labyrinth seal in a turn-back movement way, and the labyrinth seal increases the local resistance of gas phase circulation and reduces the leakage quantity. The labyrinth seal can reduce leakage, and has simple structure and low cost.

Description

Flue valve adopting labyrinth seal

Technical Field

The utility model relates to the technical field of gas phase conveying, in particular to a flue valve adopting labyrinth seal.

Background

The flue has a large pipe diameter, and the gas phase valve of the flue is usually a ventilation flue valve, so that the flue has the characteristics of convenience in opening and closing and low cost. The valve plate, the limiting plate and the valve body are sealed through bonding, most of ventilation flue valves are subjected to nonstandard processing, and due to processing precision, running abrasion and design defects, the air leakage rate is about 2%, and exhaust gas leakage occurs to generate peculiar smell or pollution when the flue is positive pressure so as to cause health or environmental protection risks of people; when the smoke is under negative pressure, wild wind can enter the flue to increase the gas quantity and destroy the negative pressure, and metal corrosion can be accelerated sometimes.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a flue valve adopting labyrinth seal, which comprises a valve plate, a valve body, a limiting plate and the like, wherein at least one seal is respectively fixed on the limiting plate and/or the valve plate in the overlapping area of the limiting plate and the valve plate, the sealing on the limiting plate and the valve plate can be staggered or overlapped, gas phase in a pipeline or gas phase outside the pipeline can leak or be sucked through the labyrinth seal in a turn-back movement way, and the labyrinth seal increases the local resistance of gas phase circulation and reduces the leakage amount. The labyrinth seal can reduce leakage, and has simple structure and low cost.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides an adopt labyrinth seal's flue valve, includes valve body, valve plate, limiting plate and valve shaft, the valve plate passes through the valve shaft and installs in the valve body, the limiting plate is fixed at the valve body inner wall, drives the valve plate by the valve shaft and rotates in spacing space, be fixed with protruding sealedly on valve plate outside edge and the limiting plate, when the valve was closed, the valve plate formed labyrinth structure with protruding sealedly on the limiting plate.

As a further improvement of the utility model, the convex seal is a hump bead or a sealing strip, and the two schemes can be used, and the applicant can select according to the needs.

As a further improvement of the utility model, at least 1 convex seal is fixed on the outer side edge of the valve plate, at least 1 convex seal is fixed on the limiting plate, and the applicant selects according to the size and actual needs of the valve.

As a further improvement of the utility model, the hump bead is 1-3mm in height and 2-5mm in width.

As a further improvement of the utility model, the sealing strip is 1-8mm in height and 1-8mm in width, and is fixed by one or more forms of welding or gluing or self-tapping screws.

The utility model discloses a flue valve adopting labyrinth seal, at least one seal is fixed on a limiting plate and/or a valve plate respectively in an overlapping area of the limiting plate and the valve plate, the sealing on the limiting plate and the valve plate can be staggered or overlapped, gas phase in a pipeline or gas phase outside the pipeline can pass through the labyrinth seal to leak in a turn-back movement way, and the labyrinth seal increases the local resistance of gas phase circulation and reduces the leakage quantity. The labyrinth seal has simple structure and low cost, and can effectively reduce the air leakage.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is a schematic closing diagram of an embodiment of the present utility model;

FIG. 3 is an open schematic of an embodiment of the present utility model;

FIG. 4 is a schematic closing diagram of a second embodiment of the present utility model;

FIG. 5 is a second open schematic of an embodiment of the present utility model;

accessory description:

1. a valve body; 2. a valve plate; 3. a limiting plate; 4. a valve shaft; 5. hump welding bead; 6. and (5) a sealing strip.

Description of the embodiments

The utility model is described in further detail below with reference to the attached drawings and detailed description:

a flue valve adopting labyrinth seal is shown in figure 1, and mainly comprises a valve plate 2, a valve shaft 4, a valve body 1 and a limiting plate 3, wherein the valve shaft 4 drives the valve plate 2 to rotate, and the valve plate 2 is 90 degrees in the closing and opening states. When the flue valve is closed, the valve plate 2 is attached to the limiting plate 3, and sealing is achieved through the attachment of the two plates. The valve plate 2 and the limiting plate 3 are made of metal materials

In the specific scheme 1, a closing schematic view is shown in the following figure 2, an opening schematic view is shown in the figure 3, 1-3 hump welding beads 5 are welded on the surfaces of the limiting plate 3 and the valve plate 2 respectively at the joint positions of the valve plate 2 and the valve plate 2, the welding beads are 1-3mm in height and 2-8mm in width, welding beads on the limiting plate 3 and the valve plate 2 are staggered, the surfaces of the welding beads are polished to remove irregular protrusions on the surfaces, and the surfaces of the welding beads are required to be smooth. When the valve is in a closed state, the hump bead of the valve plate and the limiting plate forms a labyrinth structure.

The beneficial effects of the embodiment are as follows: the labyrinth bead on the valve plate 2 and the limiting plate 3 allows the gas phase to leak only by the foldback operation, and the labyrinth increases the local resistance of the gas phase circulation, so that the gas leakage can be obviously reduced. The welding bead is firmly connected with the valve plate 2 and the limiting plate 3 due to welding, and does not fall off; the welding bead is made of metal, and is hard and wear-resistant.

The specific scheme 2 is as follows, the closing schematic diagram is shown in fig. 4, the opening schematic diagram is shown in fig. 5, the flue valve is circular, sealing strips 6 are respectively fixed on the joint positions of the limiting plate 3 and the valve plate 2 in joint areas of the valve plate 2 and the limiting plate 3, the sealing strips 6 are 1-8mm in height and 1-8mm in width, and the sealing strips 6 on the limiting plate 1 and the valve plate 2 are staggered. When the valve is in a closed state, the valve plate 2 and the sealing strip 6 of the limiting plate 3 are in a stroke labyrinth structure. The sealing strip 6 is made of the same metal material as the valve plate and the limiting plate 3, avoids intergranular corrosion, and is hard, wear-resistant and corrosion-resistant. The sealing strip can be fixed in one or more forms of welding, gluing, self-tapping screws and the like.

The beneficial effects of the embodiment are as follows: the labyrinth sealing strips 6 on the valve plate 2 and the limiting plate 3 allow the gas phase to leak only by the foldback operation, and the labyrinth increases the local resistance of the gas phase circulation, so that the gas leakage can be obviously reduced.

The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the present utility model in any other way, but is intended to cover any modifications or equivalent variations according to the technical spirit of the present utility model, which fall within the scope of the present utility model as defined by the appended claims.

Claims (6)

1. The utility model provides an adopt labyrinth seal's flue valve, includes valve body (1), valve plate (2), limiting plate (3) and valve shaft (4), valve plate (2) are installed in valve body (1) through valve shaft (4), its characterized in that: the valve is characterized in that the limiting plate (3) is fixed on the inner wall of the valve body (1), the valve shaft (4) drives the valve plate (2) to rotate in the limiting plate (3), the outer side edge of the valve plate (2) and the limiting plate (3) are fixedly provided with protruding seals, and when the valve is closed, the protruding seals on the valve plate (2) and the limiting plate (3) form a labyrinth structure.

2. A flue valve employing labyrinth seals as defined in claim 1 wherein: the convex seal is a hump bead (5) or a sealing strip (6).

3. A flue valve employing labyrinth seals according to claim 1 or 2, wherein: at least 1 convex seal is fixed on the outer side edge of the valve plate (2), and at least 1 convex seal is fixed on the limiting plate (3).

4. A flue valve employing labyrinth seals as defined in claim 2 wherein: the hump bead (5) is 1-3mm high and 2-5mm wide.

5. A flue valve employing labyrinth seals as defined in claim 2 wherein: the sealing strip (6) is 1-8mm in height and 1-8mm in width.

6. A flue valve employing labyrinth seals as recited in claim 5, wherein: the sealing strip (6) is fixed in one or more forms by welding or gluing or self-tapping screws.