Blind plate valve for high-temperature acid flue gas pipeline

Abstract

The utility model relates to the technical field of blind plate valves, and provides a high-temperature acid flue gas pipeline blind plate valve which comprises a box body, two ends of the box body are communicated with pipelines, a sealing cover is arranged at the top end of the box body, a valve plate is movably arranged in the box body in a sealing mode, and a sealing ring used for sealing pipe openings of the pipelines is arranged on one face of the valve plate. The box body is movably connected with the ejector rod used for abutting against the other face of the valve plate in a pushing mode, the valve plate used in the box body is movably arranged in a sealed mode, the ejector rod pushes the valve plate, a sealing ring seals a pipe opening of a pipeline, double sealing is achieved, acid flue gas leakage is effectively avoided, and the reliability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blind plate valves, in particular to a blind plate valve for a high-temperature acidic flue gas pipeline. Background Art

[0002] The high-temperature, high-concentration SO2 flue gas generated during the smelting of copper concentrate in the smelting furnace and the converter blowing process is transported to the acid-making process through high-temperature fans to produce concentrated sulfuric acid. Normally, high-temperature fans are operated in a one-in-one standby mode, and the fans need to be switched regularly to maintain operating efficiency. The switching operation is to enable the standby fan and use the control valve to block the inlet of the high-temperature fan that needs to be disabled to meet the fan switching requirements.

[0003] However, at present, the flue gas duct is usually controlled by a butterfly valve, and the butterfly valve is mainly sealed with rubber material. Under high temperature, the rubber material is easily damaged, resulting in a loose seal and acid corrosion of the butterfly valve. At the same time, due to the integrated structure design of the butterfly valve, the overall replacement and maintenance costs are high. Utility Model Content

[0004] The utility model aims to provide a blind plate valve for a high-temperature acidic flue gas pipeline, which solves the above-mentioned technical problems, effectively avoids leakage of acidic flue gas and improves the reliability of the device.

[0005] The embodiment of the utility model is realized through the following technical scheme: a high-temperature acidic flue gas pipeline blind plate valve, including a box body, both ends of the box body are connected with pipelines, a sealing cover is provided at the top of the box body, a valve plate is movably sealed in the box body, a sealing ring for sealing the pipe mouth of the pipeline is provided on one side of the valve plate, and a push rod for pushing and abutting the other side of the valve plate is movably connected on the box body.

[0006] Furthermore, a first lifting ring is provided at the top of the valve plate, and the sealing cover comprises a raised cover for avoiding the first lifting ring, and a second lifting ring is provided on the raised cover.

[0007] Preferably, the sealing cover is detachably connected to the top of the box body.

[0008] Furthermore, the valve plate and the sealing ring are both made of carbon steel.

[0009] Furthermore, an anti-corrosion layer is applied on the inner wall of the box and the inside of the sealing ring.

[0010] Furthermore, a plurality of push rods are provided, and they act evenly on the valve plate.

[0011] Furthermore, the sealing ring is sealingly buckled on the pipe opening of the pipeline.

[0012] The utility model has at least the following advantages and beneficial effects: through the movable sealing arrangement of the valve plate inside the box body and the push rod pushing the valve plate, the sealing ring seals the pipe opening, realizing double sealing, effectively avoiding leakage of acidic flue gas, and improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the structure of a high-temperature acid flue gas pipeline blind plate valve provided by the utility model;

[0015] Figure 2 A schematic diagram of the structure of a box and a valve plate in a blind plate valve for a high-temperature acidic flue gas pipeline provided by the utility model;

[0016] Figure 3 A cross-sectional view of a high-temperature acid flue gas pipeline blind plate valve provided by the utility model;

[0017] Figure 4 A schematic diagram of the structure of a valve plate in a blind plate valve for a high-temperature acidic flue gas pipeline provided by the utility model;

[0018] Icon: 1-box, 10-pipe, 2-sealing cover, 21-raised cover, 22-second lifting ring, 3-valve plate, 31-first lifting ring, 4-sealing ring, 5-top rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example

[0022] like Figure 1-4 As shown, in this embodiment, a blind plate valve for a high-temperature acidic flue gas pipeline 10 is mainly disclosed, which has a simple and reliable structure and comprises a box body 1. Both ends of the box body 1 are connected with pipelines 10. The pipelines 10 at both ends of the box body 1 are respectively connected with the high-temperature and high-concentration SO2 flue gas and the inlet of the existing high-temperature fan. A sealing cover 2 is provided at the top of the box body 1. A valve plate 3 is movably sealed in the box body 1. The valve plate 3 is abutted against the inner wall of the box body 1 and the sealing cover 2 on all sides, so that the valve plate 3 is sealed and matched with the inside of the box body 1 to form a first seal. A sealing ring 4 for sealing the pipe mouth of the pipeline 10 is provided on one side of the valve plate 3. A push rod 5 for pushing and abutting the other side of the valve plate 3 is movably connected to the box body 1. By pushing the push rod 5, the valve plate 3 slides in a sealing manner in the box body 1, so that the sealing ring 4 is close to the pipe mouth of the pipeline 10 to form a second seal, which effectively avoids leakage of acidic flue gas and air pollution, thereby improving the reliability of the device.

[0023] Furthermore, in a specific implementation, the sealing cover 2 provided in the embodiment of the utility model is detachably connected to the top of the box body 1. Specifically, the sealing cover 2 can be detachably sealed with the top of the box body 1 by bolt connection, flange connection or clamp connection, so as to facilitate the insertion, removal and replacement of the valve plate 3 inside the box body 1; preferably, a first lifting ring 31 is provided on the top of the valve plate 3, and the sealing cover 2 includes a raised cover 21 for avoiding the first lifting ring 31, and a second lifting ring 22 is provided on the raised cover 21. Specifically, the first lifting ring 31 is welded to the valve plate 3 to form a whole, and the second lifting ring 22, the raised cover 21 and the sealing cover 2 are welded to form a whole. 1 is higher than the box body 1. In order to facilitate the installation and sealing of the sealing cover 2, a raised cover 21 is designed to cover the first lifting ring 31. The internal space of the raised cover 21 and the top of the valve plate 3 constitute a closed independent space, and the sliding range of the valve plate 3 in the box body 1 is limited by the abutment between the first lifting ring 31 and the raised interior. When it is necessary to switch and stop the fan, the sealing cover 2 is disassembled, and the sealing cover 2 is lifted off by a hand chain hoist through the second lifting ring 22, and then the hand chain hoist is used to lift and insert the valve plate 3 through the first lifting ring 31, and the push rod 5 is screwed to push the valve plate 3, so that the sealing ring 4 seals the pipe opening of the pipeline 10 connected to the high-temperature and high-concentration SO2 flue gas, thereby achieving blocking, easy operation and maintenance, and improving construction efficiency.

[0024] Furthermore, in a specific implementation, the valve plate 3 and the sealing ring 4 provided in the embodiment of the utility model are both made of carbon steel.

[0025] Furthermore, in the specific implementation, the inner wall of the box body 1 and the sealing ring 4 provided in the embodiment of the utility model are coated with an anti-corrosion layer. It should be noted that the anti-corrosion layer can be a mixture of water glass acid-resistant mud and asbestos wool. The existing butterfly valve does not have the conditions for coating the anti-corrosion layer due to its internal integrated structure, and therefore does not have the anti-corrosion and heat-insulating effect, which makes it easy for the flue gas temperature to drop suddenly at the control valve, causing the flue gas to condense, forming acid to corrode the control valve, causing high-concentration SO2 flue gas to leak, and triggering environmental pollution incidents. The blind plate valve can solve the above problem and form an anti-corrosion layer of a certain thickness on the inner wall of the box body 1 and the sealing ring 4, which plays a role in anti-corrosion and heat-insulating, and avoids condensation of high-temperature acidic flue gas and corrosion of the inner wall.

[0026] Furthermore, in a specific implementation, the above-mentioned push rods 5 provided in the embodiment of the utility model are provided in plurality and act evenly on the valve plate 3. Specifically, the push rods 5 can be bolts or screws, which are sealingly threadedly connected to the side wall of the box body 1 and rotated and extended to stably push the valve plate 3.

[0027] Furthermore, in the specific implementation, the sealing ring 4 provided in the embodiment of the utility model is sealed and buckled on the pipe mouth of the pipe 10. The inner ring diameter of the sealing ring 4 is the same as the outer diameter of the pipe 10, and it can be put on the smoke pipe to play a sealing role. The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-temperature acidic flue gas pipeline blind plate valve, characterized in that: The invention comprises a box body (1), both ends of the box body (1) are connected to a pipeline (10), a sealing cover (2) is provided at the top of the box body (1), a valve plate (3) is movably sealed in the box body (1), one side of the valve plate (3) is provided with a sealing ring (4) for sealing the pipe opening of the pipeline (10), and a push rod (5) is movably connected to the box body (1) for pushing and abutting against the other side of the valve plate (3).

2. A high temperature acid flue gas pipeline blind plate valve according to claim 1, characterized in that: The sealing cover (2) is detachably connected to the top of the box body (1).

3. A high temperature acid flue gas pipeline blind plate valve according to claim 2, characterized in that: A first lifting ring (31) is provided at the top of the valve plate (3), and the sealing cover (2) comprises a protruding cover (21) for avoiding the first lifting ring (31), and a second lifting ring (22) is provided on the protruding cover (21).

4. A high temperature acid flue gas pipeline blind plate valve according to claim 1, characterized in that: The valve plate (3) and the sealing ring (4) are both made of carbon steel.

5. A high temperature acid flue gas pipeline blind plate valve according to claim 1, characterized in that: The inner wall of the box body (1) and the inside of the sealing ring (4) are both coated with an anti-corrosion layer.

6. A high temperature acid flue gas pipeline blind plate valve according to claim 1, characterized in that: A plurality of push rods (5) are provided, and they act evenly on the valve plate (3).

7. A high temperature acid flue gas pipeline blind plate valve according to claim 1, characterized in that: The sealing ring (4) is sealingly buckled on the pipe opening of the pipe (10).

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