Ventilation valve suitable for field of high-temperature stoves

Abstract

The utility model discloses a vent valve suitable for the field of high-temperature stoves, and relates to the field of vent valves, the vent valve is provided with a body and a valve assembly, the body is provided with at least one cavity, and the cavity is further provided with a partition plate which separates an air inlet from an air outlet and is provided with vent holes; the ventilation hole is surrounded by an annular raised enclosure; the upper end of the fence is contracted so as to reduce the end face area of the fence; the valve assembly is provided with a valve plate located in the cavity, and the valve plate is driven by a driving unit to move. The driving unit is provided with a working shaft which is matched with the valve plate and drives the valve plate to be matched, and the working shaft and the valve plate are axially restrained and have a certain radial matching activity amount, so that the valve plate has a certain deflection freedom degree. According to the ventilation valve, through self-adaptive adjustment of the valve plate, the problem that an existing turning plate structure is prone to clamping stagnation under the high-temperature condition is solved, the sealing performance of the ventilation valve is greatly improved, and the ventilation valve can keep a stable operation state under various working conditions.

Description

Technical Field

[0001] This application relates to the field of ventilation valves, and particularly to a ventilation valve applicable to the field of high-temperature stoves. Background Art

[0002] In the field of high-temperature stoves, as an important component, the ventilation valve is widely used in industrial equipment such as regenerative burners, furnaces, and aluminum melting furnaces. The main function of the ventilation valve is to supply air to the stove to ensure the stable progress of the combustion process inside the stove. Usually, the ventilation valve needs to be frequently switched between the open and closed states. Therefore, the reliability of the ventilation valve directly affects the normal operation of the stove. Currently, the ventilation valves widely used in industrial stoves are mainly valve bodies based on the flap structure. This valve body uses a flap with a shaft and a matching ventilation hole to achieve ventilation control. The flap seals the ventilation hole under normal conditions. When ventilation is required, the rotation of the shaft causes the rotation of the flap, thereby adjusting the ventilation volume. Although this structure is simple and the technology is mature, there are significant deficiencies in practical applications.

[0003] In a high-temperature and high-dust industrial environment, the existing flap structure ventilation valves are prone to jamming or even getting stuck. The root cause of this problem lies in the clearance between the flap and the inner wall surface of the ventilation hole. To ensure the flexible rotation of the flap, a clearance of 1 - 1.5 mm is usually reserved. However, the operating environment of industrial stoves is often harsh. Smoke and dust will not only corrode the inner wall of the ventilation hole but also form crusts inside the hole. These factors will increase the resistance of the flap during use, resulting in jamming or getting stuck. In addition, the high-temperature environment where the ventilation valve is located causes the flap to expand due to heat, with an increased deformation, which further exacerbates the jamming phenomenon. These problems lead to insufficient reliability of the flap structure ventilation valves in actual use.

[0004] On the other hand, the usage requirements of the ventilation valve mainly focus on two aspects: ventilation switch control and ventilation air volume control. Since the ventilation switch control is used frequently, while the ventilation air volume control is only adjusted occasionally when the stove is in a stable working state, the existing solutions that use complex mechanisms to achieve automatic switching and air volume control perform poorly in terms of cost and reliability. For example, using drive mechanisms with controllable opening degrees or step amounts such as stepper motors or electromagnetic control valves can achieve precise ventilation control. However, in a harsh environment of high temperature and high dust, these devices are prone to failure. In addition, such devices also require a series of control systems and supporting circuits, further increasing the overall cost of the system and the complexity of maintenance.

[0005] In summary, there is an obvious room for improvement in the structural design of existing high-temperature stove ventilation valves, especially an urgent need to improve their reliability in high-temperature and high-dust environments and reduce costs. Therefore, developing a more reliable, durable and high-temperature environment-adapted ventilation valve technology can effectively solve the deficiencies in the existing technology and has important practical significance and application value. Summary of the Invention

[0006] The purpose of this application aims to at least overcome one deficiency existing in the prior art, and provides a ventilation valve applicable to the field of high-temperature stoves. Through the adaptive adjustment of the valve plate, this ventilation valve not only solves the problem of easy jamming of the existing flap structure under high-temperature conditions, but also greatly improves the sealing performance of the ventilation valve, enabling it to maintain a stable operating state under various working conditions.

[0007] To achieve the above purpose, this application discloses a ventilation valve applicable to the field of high-temperature stoves. The ventilation valve has a body and a valve assembly. Among them, the body has at least one chamber, the chamber has at least one air inlet and at least one air outlet, and the chamber also has a partition plate with ventilation holes that separates the air inlet from the air outlet; the ventilation holes are surrounded by a ring-shaped raised enclosure; the upper end of the enclosure contracts to reduce the end face area of the enclosure; the valve assembly has a valve plate located in the chamber, and the valve plate is driven to move by a driving unit; the driving unit has a working shaft that cooperates with the valve plate and drives the valve plate to cooperate. The working shaft is axially constrained with the valve plate and has a certain radial cooperation movement amount, so that the valve plate has a certain degree of freedom of deflection. During operation, the valve plate tightly presses on the end face of the enclosure to seal the ventilation holes.

[0008] In some embodiments, the air inlet and / or the air outlet are connected and cooperated with a pipeline with a manual control valve.

[0009] In some embodiments, the driving unit is a telescopic cylinder, and the moving shaft of the cylinder is the working shaft.

[0010] In some embodiments, the valve plate has a connecting seat that cooperates with the working shaft; the lower end of the working shaft is inserted into the connecting seat and is axially constrained with the connecting seat; the working shaft and the connecting seat have a cooperation gap in the radial direction.

[0011] In some embodiments, a rubber ring suitable for the cooperation gap is sleeved between the working shaft and the connecting seat.

[0012] In some embodiments, the chamber is separated into an intake chamber and an exhaust chamber by a partition plate, and the intake chamber and / or the exhaust chamber are separated into independent spaces by baffles. A single intake chamber cooperates with at least one exhaust chamber; each intake chamber or exhaust chamber cooperates with a valve assembly.

[0013] In some embodiments, a normally closed maintenance opening is provided in the chamber.

[0014] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0015] 1. Adaptive sealing performance: Through the design of a valve plate with a certain degree of skew freedom, it can automatically adjust in the case of uneven valve port ends, achieve reliable sealing, ensure good sealing performance of the ventilation valve under various working conditions, and can effectively alleviate the influence of high-temperature and high-dust environments on the ventilation valve, reduce jamming and sticking phenomena, and extend the service life of the valve.

[0016] 2. Simplified maintenance operation: It is provided with a normally closed inspection port, which is convenient for daily maintenance and repair, improves the maintenance efficiency, reduces the downtime, and lowers the maintenance cost.

[0017] 3. Precise air flow control: By separating the air inlet chamber and multiple independent spaces and equipping with valve components that work independently, independent control of air intake and / or exhaust is achieved, and the ventilation volume can be adjusted more precisely to meet the requirements under different working conditions.

[0018] The beneficial effects listed above do not exhaust all the advantages. Other potential beneficial effects and detailed technical implementation manners will be further revealed in the embodiments or other description parts of the present application. Brief Description of the Drawings

[0019] After reading the following specific implementation manners in conjunction with the drawings, various aspects of the present disclosure will be better understood. Sometimes, the positions, sizes, and ranges of the structures shown in the drawings, etc., do not represent the actual positions, sizes, and ranges, etc. In the drawings:

[0020] Figure 1 is the overall structural schematic diagram of an embodiment disclosed in the present application.

[0021] Figure 2 is the structural schematic diagram of an embodiment disclosed in the present application from another perspective.

[0022] Figure 3 is the structural schematic diagram of a half-sectioned embodiment disclosed in the present application.

[0023] Figure 4 is Figure 3 the enlarged view of part A of

[0024] Figure 5 is the structural schematic diagram of an embodiment disclosed in the present application from a three-dimensional perspective in a sectional state.

[0025] Figure 6 is the exploded view of the working shaft of an embodiment disclosed in the present application.

[0026] Figure 7It is a schematic diagram showing the cooperation between the deflected valve plate and the deformed enclosure in an embodiment disclosed in the present application. Detailed implementation manners

[0027] The following will describe the present disclosure with reference to the accompanying drawings, in which several embodiments of the present disclosure are shown. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully explain the protection scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0028] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, for clarity, the dimensions of some features may be deformed.

[0029] It should be understood that the terms used in the specification are only for describing specific embodiments and are not intended to limit the present disclosure. All terms used in the specification (including technical terms and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorized specification.

[0030] The singular forms "a", "the", and "said" used in the specification include the plural forms unless clearly specified. The terms "comprising", "including", and "containing" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the related listed items.

[0031] As Figures 1 to 5 shown, as Figures 1 to 3 shown, this embodiment describes a ventilation valve applicable to the field of high-temperature stoves, and its overall structure includes a body 1 and a valve assembly 2.

[0032] Specifically, as Figure 3 shown, the body 1 is provided with at least one chamber 101, and the chamber 101 has at least one air inlet 103 and at least one air outlet 104. A partition 102 with ventilation holes 105 that separates the air inlet 103 from the air outlet 104 is arranged in the chamber 101. The ventilation holes 105 are surrounded by an enclosure 106 with a ring-shaped protrusion, and the upper end of the enclosure 106 adopts a shrinking structure to reduce the end face area of the enclosure 106.

[0033] In the above structure, as Figure 3 、 5, as shown in FIGS. 7, the design of the enclosure 106 particularly considers the problems of dust accumulation and deformation that may occur in the high-temperature stove environment. By designing the upper end of the enclosure 106 as a contraction structure, the end face area is reduced, thus better maintaining the sealing performance in the high-temperature environment. This design effectively reduces the impact of thermal expansion and contraction on the sealing performance, because a smaller end face will produce a smaller change in the contact area during deformation, ensuring that the sealing performance can be guaranteed under various working conditions.

[0034] The valve assembly 2 includes a valve plate 202 located in the chamber 101, and the valve plate 202 is driven to move by a driving unit 201. The driving unit 201 has a working shaft 203 that cooperates with the valve plate 202 and drives the valve plate 202 to move. The working shaft 203 is axially constrained with the valve plate 202, but has a certain amount of cooperation movement in the radial direction, so that the valve plate 202 has a certain degree of freedom of deflection. During operation, the valve plate 202 tightly presses on the end face of the enclosure 106 to seal the ventilation hole 105.

[0035] More specifically, in this embodiment, a connection seat 204 that cooperates with the working shaft 203 is provided on the back of the valve plate 202. The lower end of the working shaft 203 is inserted into the connection seat 204 and is axially constrained with the connection seat 204. In order to achieve the radial cooperation movement, there is a cooperation gap between the working shaft 203 and the connection seat 204. A rubber ring 205 adapted to the cooperation gap is sleeved between the working shaft 203 and the connection seat 204. The rubber ring 205, as an elastic element, fills the cooperation gap between the working shaft 203 and the connection seat 204, not only maintaining the connection between the two, but also allowing the valve plate 202 to make a small deflection adjustment when affected by external forces or thermal expansion and contraction.

[0036] As Figure 1 , 2 , as shown in FIGS. 3, the driving unit 201 is preferably a telescopic cylinder, and the movable shaft of the cylinder is the working shaft 203. The telescopic cylinder drives the working shaft 203 to move up and down by controlling the input and output of compressed air, thereby driving the opening and closing of the valve plate 202. Such a design can achieve rapid and accurate control of the ventilation valve, meeting the requirements of the high-temperature stove for air flow regulation.

[0037] In this embodiment, the chamber 101 is divided into an intake chamber and an exhaust chamber by a partition 102. The intake chamber and / or the exhaust chamber can be further divided into independent spaces by baffles to achieve precise control of the air flow. A single intake chamber cooperates with at least one exhaust chamber, and a set of valve assemblies 2 are installed in each intake chamber or exhaust chamber. By controlling the opening and closing of different valve assemblies 2, the intake and exhaust air volumes of the ventilation valve can be flexibly adjusted to meet the requirements of the high-temperature stove under different working conditions. For example, when it is necessary to reduce the exhaust air volume, only the valve assembly of one exhaust chamber can be opened; while when it is necessary to increase the exhaust air volume, the valve assemblies 2 of multiple exhaust chambers can be opened simultaneously.

[0038] In addition, the air inlet 103 and / or the air outlet 104 can be connected and cooperated with a pipeline with a manually controlled valve, such as Figure 1 shown. Through the manually controlled valve, the operator can manually adjust the on / off and flow rate of the air flow, increasing the flexibility of operation. This is very useful when emergency shutdown or fine adjustment of the air flow is required.

[0039] For the convenience of maintenance, a normally closed maintenance port 107 is also provided in the chamber 101. When there is dust accumulation, jamming or component replacement is needed, the maintenance port 107 can be opened to quickly carry out cleaning and maintenance. The maintenance port 107 can ensure the sealing performance of the chamber 101 in the normally closed state, avoiding affecting the normal operation of the ventilation valve.

[0040] It should be elaborated in detail that the valve plate 202 has a certain degree of deflection freedom to cope with the complex working environment in the high-temperature stove and ensure that the ventilation valve can still maintain good sealing performance and operation reliability under various working conditions. Specifically, as Figure 7 shown, in a high-temperature environment, the end face of the enclosure 106 may undergo slight deformation due to thermal expansion and contraction, wear or dust accumulation. Through its deflection freedom, the valve plate 202 can adaptively adjust the angle to closely fit the end face of the enclosure 106 to ensure the sealing performance.

[0041] It should be noted that for the convenience of understanding the principle of this embodiment, Figure 7 the deformation size has been magnified, and the actual deformation is much smaller than Figure 7 .

[0042] However, it should be understood that even with the self-adjustment ability, it does not mean that absolute sealing can be achieved. The valve plate 202 mainly reduces the air leakage through the cooperation of its deflection freedom and the small-area end face of the enclosure 106. In contrast, the gap between the outer diameter of the valve piece and the inner wall of the valve barrel in a flap valve is usually about 1 mm to 1.5 mm. If the gap is too large, the air leakage will be too large; if the gap is too small, it is easy to jam or get stuck during thermal expansion. The valve port gap of this type of push-pull valve plate in this embodiment is extremely small, so the air leakage is also extremely small.

[0043] In this design, by reducing the end face area of the enclosure 106 and endowing the valve plate 202 with a certain degree of deflection freedom, the valve can adapt to slight deformation, maintain a relatively tight seal, and thus reduce the air leakage. Although absolute sealing cannot be achieved, the air leakage has been reduced as much as possible to meet the requirements of the high-temperature stove for the air flow control accuracy.

[0044] In addition, the shrinkage design at the upper end of the retaining wall 106 not only reduces the end face area, decreases the influence of thermal expansion and contraction on the deformation of the retaining wall 106, but also effectively prevents the accumulation of dust and flue gas on the contact surface between the retaining wall 106 and the valve plate 202. In high-temperature stoves, dust and flue gas often contain corrosive components. Prolonged use will cause these particulate matters to deposit on the contact surface, affecting the sealing effect and the normal operation of the valve plate 202. The smaller end face area reduces the deposition surface of dust and flue gas, thereby reducing the possibility of dust accumulation, extending the service life of the valve, and reducing the sealing failure and jamming phenomena caused by dust accumulation.

[0045] During the actual operation process, when the valve plate 202 is closed, it tightly presses against the end face of the retaining wall 106. Relying on the cooperation of the elastic rubber ring 205 and the working shaft 203, effective sealing is achieved. When opening, the drive unit 201 drives the working shaft 203 to move upward, driving the valve plate 202 away from the end face of the retaining wall 106, opening the ventilation hole 105, and allowing air flow through. Since the valve plate 202 has a skew freedom degree, even if there are slight unevenness on the end face of the retaining wall 106, the valve plate 202 can still maintain good contact with it to ensure the sealing effect.

[0046] In summary, through the optimization of the structural design of the retaining wall 106 and the valve plate 202, this embodiment provides a ventilation valve applicable to the field of high-temperature stoves. This ventilation valve can maintain stable sealing performance and flexible operation in high-temperature and high-dust industrial environments, meeting the equipment's requirements for gas control. By reducing the end face area of the retaining wall 106 and endowing the valve plate 202 with a skew freedom degree, not only the air leakage amount is reduced, but also problems such as thermal expansion and contraction and dust accumulation in high-temperature environments are effectively addressed, improving the reliability and service life of the valve.

[0047] Although the exemplary embodiments of the present disclosure have been described, those skilled in the art should understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and equivalents of these claims are also included.

Claims

1. A ventilation valve applicable to the field of high-temperature stoves, characterized in that: The ventilation valve has a body and a valve assembly. Among them, the body has at least one chamber, the chamber has at least one air inlet and at least one air outlet, and the chamber also has a partition plate with ventilation holes that separates the air inlet from the air outlet; the ventilation holes are surrounded by a ring-shaped raised enclosure; the upper end of the enclosure shrinks to reduce the end face area of the enclosure; the valve assembly has a valve plate located in the chamber, and the valve plate is driven to move by a driving unit; the driving unit has a working shaft that cooperates with the valve plate and drives the valve plate to cooperate. The working shaft is axially constrained with the valve plate and has a certain amount of radial cooperation movement, so that the valve plate has a certain degree of deflection freedom. During operation, the valve plate tightly presses on the end face of the enclosure to seal the ventilation holes.

2. The ventilation valve applicable to the high-temperature stove field as described in claim 1, characterized in that: The air inlet and / or the air outlet are connected and cooperate with a pipeline with a manual control valve.

3. A ventilation valve applicable to the field of high-temperature stoves as described in claim 1, characterized in that: The driving unit is a telescopic cylinder, and the movable shaft of the cylinder is the working shaft.

4. A ventilation valve applicable to the field of high-temperature stoves as described in claim 1, characterized in that: The valve plate has a connecting seat that cooperates with the working shaft; the lower end of the working shaft is inserted into the connecting seat and is axially constrained with the connecting seat; the working shaft and the connecting seat have a clearance fit in the radial direction.

5. A ventilation valve applicable to the field of high-temperature stoves as described in claim 4, characterized in that: A rubber ring suitable for the clearance fit is sleeved between the working shaft and the connecting seat.

6. A ventilation valve applicable to the field of high-temperature stoves as described in claim 1, characterized in that: The chamber is divided into an air inlet chamber and an air outlet chamber via the partition plate. The air inlet chamber and / or the air outlet chamber are divided into independent spaces by baffles. A single air inlet chamber cooperates with at least one air outlet chamber; each air inlet chamber or air outlet chamber cooperates with a valve assembly.

7. A ventilation valve applicable to the field of high-temperature stoves as described in claim 1, characterized in that: An inspection opening that is normally closed is provided in the chamber.

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