A sealing structure for the valve plate of a reversing valve in a heating furnace

Abstract

This utility model relates to the field of valve technology, and specifically to a valve plate sealing structure for a reversing valve of a heating furnace. The reversing valve includes a valve body, a valve plate, a partition plate, a valve plate pull rod, and a pneumatic actuator. The lower surface of the valve plate has a valve plate sealing ring groove, and the bottom of the groove has a dovetail groove. The upper surface of the partition plate has a partition plate sealing ring groove. A sealing ring is provided between the valve plate sealing ring groove and the partition plate sealing ring groove. The upper part of the sealing ring is embedded in the valve plate sealing ring groove, and the top of the sealing ring tightly fits with the dovetail groove of the valve plate sealing ring groove and is bonded to it. When the valve plate and the partition plate are pressed together, the bottom of the sealing ring makes sealing contact with the partition plate sealing ring groove. At this time, a pre-reserved gap is provided between the valve plate and the partition plate. This utility model ensures a sealing effect through the cooperation of the sealing ring with the valve plate sealing ring groove and the partition plate sealing ring groove. The sealing ring is easy to replace.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically relates to a valve plate sealing structure for a reversing valve of a heating furnace. Background Technology

[0002] The heating furnace is the core component ensuring smooth production in the steel rolling process, and the reversing system is the core of the furnace's combustion control system. The sealing performance of the reversing valve is paramount, ensuring not only safe gas leaks but also guaranteeing the quality of billet heating. Currently, the reversing valve seal is fixed to a partition plate; when the valve plate falls, it presses against the sealing ring to achieve a seal.

[0003] When the sealing ring is worn or has gaps due to high-temperature hardening, the seal will not be tight, causing unstable furnace temperature. Regardless of whether it's in the intake or exhaust phase, the gas will be drawn into the atmosphere through leaks in the exhaust valve plate by the induced draft fan, resulting in gas waste and affecting the billet heating process.

[0004] When replacing the seals while the valve plate is raised, maintenance personnel must crawl inside the reversing valve to operate. Temporary maintenance requiring hot shutdown for seal replacement poses a serious threat to the personal safety of maintenance personnel, easily leading to gas poisoning and suffocation, as well as injuries from impacts and burns. During replacement operations, the valve plate is directly above the personnel's heads; if inadequate protective measures are in place, the valve plate falling could cause severe injury, making it extremely dangerous. Furthermore, when there is accumulated ash in the gas pipeline, even after purging, volatile substances will still be released, potentially harming maintenance personnel. Therefore, improvements to the valve plate sealing structure are necessary. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a sealing structure for the valve plate of a reversing valve in a heating furnace, which solves the problem of difficulty in replacing the sealing ring.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A valve plate sealing structure for a reversing valve of a heating furnace is disclosed. The reversing valve includes a valve body, a valve plate, a partition, a valve plate pull rod, and a pneumatic actuator. The lower surface of the valve plate is provided with a valve plate sealing ring groove, and the bottom of the valve plate sealing ring groove is provided with a dovetail groove. The upper surface of the partition is provided with a partition sealing ring groove. A sealing ring is provided between the valve plate sealing ring groove and the partition sealing ring groove. The upper part of the sealing ring is embedded in the valve plate sealing ring groove, and the top of the sealing ring is tightly fitted with the dovetail groove of the valve plate sealing ring groove and bonded to the valve plate sealing ring groove. When the valve plate and the partition are pressed together, the bottom of the sealing ring is in sealing contact with the partition sealing ring groove. At this time, a reserved gap is provided between the valve plate and the partition.

[0008] The bottom of the partition sealing ring groove is provided with a shaped groove or a U-shaped groove.

[0009] The sealing ring is bonded to the valve plate sealing ring groove with sealant.

[0010] The reserved gap is 5-10mm.

[0011] The sealing ring is made of rubber.

[0012] Compared with existing technologies, the beneficial effects of this utility model are:

[0013] This invention ensures a tight seal by using a sealing ring that engages with the valve plate's sealing ring groove and the partition's sealing ring groove. Sealant is used to secure the sealing ring to the valve plate. A pre-installed gap ensures continued tightness even when the sealing ring wears down, extending its lifespan. Replacing the sealing ring is convenient. Simply install the sealing ring offline on a spare valve plate beforehand. Maintenance personnel can then easily remove the valve plate from the valve plate pull rod through the inspection port and replace it with the new sealing ring. This design ensures the safety of maintenance personnel and significantly improves work efficiency, reducing replacement time from five hours to within two hours. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the valve plate. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figures 1-2A valve plate sealing structure for a reversing valve of a heating furnace is disclosed. The reversing valve includes a valve body 1, a valve plate 2, a partition 3, a valve plate pull rod 4, and a pneumatic actuator 5. The lower surface of the valve plate 2 is provided with a valve plate sealing ring groove 7, and the bottom of the valve plate sealing ring groove 7 is provided with a dovetail groove. The upper surface of the partition 3 is provided with a partition sealing ring groove 8. A sealing ring 9 is provided between the valve plate sealing ring groove 7 and the partition sealing ring groove 8. The sealing ring 9 is made of rubber.

[0019] The upper part of the sealing ring 9 is embedded in the valve plate sealing ring groove 7. The top of the sealing ring 9 fits tightly with the dovetail groove of the valve plate sealing ring groove 7 and is bonded to the valve plate sealing ring groove 7 with the sealant. When the valve plate 2 and the partition 3 are pressed together, the bottom of the sealing ring 9 makes sealing contact with the partition sealing ring groove. At this time, there is a reserved gap between the valve plate 2 and the partition 3. The reserved gap is 5-10mm.

[0020] The bottom of the partition sealing ring groove 7 is provided with a V-shaped groove or a U-shaped groove.

[0021] To make the objectives, technical solutions, and technical effects of this utility model clearer, the technical solutions in the embodiments of this utility model are now described clearly and completely. However, the embodiments described below are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Example 1:

[0023] A valve plate sealing structure for a reversing valve of a heating furnace is disclosed. The reversing valve includes a valve body 1, a valve plate 2, a partition 3, a valve plate pull rod 4, and a pneumatic actuator 5. The lower surface of the valve plate 2 is provided with a valve plate sealing ring groove 7, and the bottom of the valve plate sealing ring groove 7 is provided with a dovetail groove. The upper surface of the partition 3 is provided with a partition sealing ring groove 8. A sealing ring 9 is provided between the valve plate sealing ring groove 7 and the partition sealing ring groove 8. The sealing ring 9 is made of high-temperature resistant fluororubber.

[0024] The upper part of the sealing ring 9 is embedded in the valve plate sealing ring groove 7. The bottom of the partition sealing ring groove 7 has a V-shaped groove. The top of the sealing ring 9 fits tightly with the dovetail groove of the valve plate sealing ring groove 7 and is bonded to the valve plate sealing ring groove 7 with the sealant. When the valve plate 2 and the partition 3 are pressed together, the bottom of the sealing ring 9 makes sealing contact with the partition sealing ring groove. At this time, there is a reserved gap between the valve plate 2 and the partition 3. The reserved gap is 5mm.

[0025] Example 2:

[0026] A valve plate sealing structure for a reversing valve of a heating furnace is disclosed. The reversing valve includes a valve body 1, a valve plate 2, a partition 3, a valve plate pull rod 4, and a pneumatic actuator 5. The lower surface of the valve plate 2 is provided with a valve plate sealing ring groove 7, and the bottom of the valve plate sealing ring groove 7 is provided with a dovetail groove. The upper surface of the partition 3 is provided with a partition sealing ring groove 8. A sealing ring 9 is provided between the valve plate sealing ring groove 7 and the partition sealing ring groove 8. The sealing ring 9 is made of high-temperature resistant fluororubber.

[0027] The upper part of the sealing ring 9 is embedded in the valve plate sealing ring groove 7. The bottom of the partition sealing ring groove 7 has a U-shaped groove. The top of the sealing ring 9 fits tightly with the dovetail groove of the valve plate sealing ring groove 7 and is bonded to the valve plate sealing ring groove 7 with the sealant. When the valve plate 2 and the partition 3 are pressed together, the bottom of the sealing ring 9 makes sealing contact with the partition sealing ring groove. At this time, there is a reserved gap between the valve plate 2 and the partition 3. The reserved gap is 8mm.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and basic spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A furnace reversing valve valve plate seal structure, characterized by, The reversing valve of the heating furnace includes a valve body, a valve plate, a partition, a valve plate pull rod, and a pneumatic actuator. The lower surface of the valve plate is provided with a valve plate sealing ring groove, and the bottom of the valve plate sealing ring groove is provided with a dovetail groove. The upper surface of the partition is provided with a partition sealing ring groove. A sealing ring is provided between the valve plate sealing ring groove and the partition sealing ring groove. The upper part of the sealing ring is embedded in the valve plate sealing ring groove, and the top of the sealing ring is tightly fitted with the dovetail groove of the valve plate sealing ring groove and bonded to the valve plate sealing ring groove. When the valve plate and the partition are pressed together, the bottom of the sealing ring is in sealing contact with the partition sealing ring groove. At this time, a reserved gap is provided between the valve plate and the partition.

2. A furnace reversing valve plate seal structure according to claim 1, wherein The bottom of the partition sealing ring groove is provided with a shaped groove or a U-shaped groove.

3. The furnace reversing valve disc seal structure of claim 1 wherein, The sealing ring is bonded to the valve plate sealing ring groove with sealant.

4. The furnace reversing valve disc seal structure of claim 1 wherein, The reserved gap is 5-10mm.

5. The furnace reversing valve disc seal structure of claim 1 wherein, The sealing ring is made of rubber.

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