Downward pressing type closed switching flap valve of coke oven

Abstract

The utility model discloses a coke oven down-pressing type closed switching flap valve which comprises a valve body provided with an upper connecting flange and a lower connecting flange, a valve port is formed in the lower portion of the valve body, a valve plate covers the upper end of the valve port, one side of the valve body is rotationally connected with a rotating shaft, the rotating shaft extends out of the valve body to be fixedly connected with a valve rod, and the valve plate is connected to the rotating shaft through a swing arm. A clamping groove matched with the peripheral wall of the upper end of the valve port in shape is formed in the lower portion of the valve plate, an inner sealing ring and an outer sealing ring are arranged on the two sides of the clamping groove respectively, and the inner sealing ring and the outer sealing ring are sealed with the two sides of the peripheral wall of the upper end of the valve port respectively. The flap valve can ensure that the sealing effect of the valve plate on the valve port is good, the valve plate does not deform and is not blocked in a high-temperature state, the sealing effect is good, stable covering and stable opening of the valve plate are ensured, and the sealing effect of the whole flap valve and a dust removal system is improved.

Description

Technical Field

[0001] This utility model relates to the field of flap valve technology, and in particular to a coke oven pressure-type sealed switching flap valve. Background Technology

[0002] With increasingly stringent national environmental protection and energy conservation requirements, coking enterprises are becoming more aware of environmental protection and flue gas recycling. Coke oven dust removal is a common technical issue. Coke ovens generate large amounts of raw coal gas and flocculent, sticky dust not only during coal charging but also during coke pushing. If left untreated, this will cause environmental pollution. Therefore, these flue gases need to be transported to a ground-based dust removal station for further treatment to reduce pollution and ensure the reuse of the flue gas. In the flue gas dust removal system, the flap valve plays a crucial role, primarily used to connect and disconnect the dust removal system, which is essential for ensuring smooth production.

[0003] However, due to the harsh operating environment of flap valves, they are subjected to the impact of high-temperature gas during use, resulting in poor sealing of the valve plate. Moreover, after prolonged use, the valve plate of the flap valve is prone to deformation under high temperature conditions, and the valve plate and valve port may also become stuck, leading to poor sealing effect between the valve plate and valve port, which affects the sealing effect of the flap valve and the dust removal system. Utility Model Content

[0004] To address the technical problems of poor sealing performance of valve plates in existing technologies, and the tendency of valve plates to deform under high temperatures, which may cause jamming between the valve plate and the valve port, resulting in poor sealing performance of the valve plate and affecting the sealing effect of the flap valve and the dust removal system, this utility model provides the following technical solution.

[0005] This utility model discloses a coke oven pressure-type sealed switching flap valve, comprising a valve body with an upper connecting flange and a lower connecting flange, a valve port at the lower part of the valve body, a valve plate covering the upper end of the valve port, a rotating shaft rotatably connected to one side of the valve body, the rotating shaft extending to the outside of the valve body and fixedly connected to a valve stem, the valve plate being connected to the rotating shaft via a swing arm, and a locking groove at the lower part of the valve plate matching the shape of the upper peripheral wall of the valve port, with an inner sealing ring and an outer sealing ring respectively on both sides of the locking groove, the inner sealing ring and the outer sealing ring sealing the two sides of the upper peripheral wall of the valve port respectively.

[0006] A locking disc is fixedly connected to the side of the rotating shaft near the valve stem. A locking blind hole is provided on the outer wall of the valve body. The locking disc is connected to the locking blind hole through a locking pin.

[0007] The locking disc has a cover hole and several retaining holes, and the locking pin passes through the cover hole or the retaining hole and is inserted into the locking blind hole.

[0008] The inner and outer sealing rings are made of high-temperature resistant rubber.

[0009] The valve body has an inspection window on one side, and the inspection window is sealed to the valve body.

[0010] Both sides of the engagement groove are rounded.

[0011] The beneficial effects of this utility model are as follows: The flap valve of this utility model is welded from high-quality structural steel. To ensure the sealing effect of the flap valve, the valve plate is provided with a locking groove, which can completely cover the upper peripheral wall of the valve port. An inner sealing ring and an outer sealing ring are respectively provided on both sides of the locking groove, ensuring a good sealing effect between the valve plate and the valve port. Furthermore, the way the locking groove covers the upper peripheral wall of the valve port ensures that the valve plate will not deform or jam under high temperature conditions, resulting in a good sealing effect. The opening and closing of the valve plate and the valve port is achieved by a rotating shaft and a valve stem to connect and close the flue gas passage. The rotating shaft is equipped with a locking disc. By inserting the locking pin into the locking disc and the locking blind hole, the stable closing and opening of the valve plate can be ensured, improving the sealing effect of the entire flap valve and the dust removal system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the coke oven pressure-type sealed switching flap valve of this utility model;

[0013] Figure 2 This is another perspective schematic diagram of the coke oven pressure-type sealed switching flap valve of this utility model;

[0014] Figure 3 yes Figure 2 Enlarged structural breakdown diagram of section A in the middle;

[0015] Figure 4 This is a cross-sectional schematic diagram of the valve body of the coke oven pressure-type sealed switching flap valve of this utility model;

[0016] Figure 5 This is a cross-sectional schematic diagram of the valve plate and valve port of the coke oven pressure-type sealed switching flap valve of this utility model.

[0017] In the diagram: 1-Valve body; 101-Upper connecting flange; 102-Lower connecting flange; 103-Locking blind hole; 2-Inspection window; 3-Rotating shaft; 4-Swing arm; 5-Valve plate; 501-Clamping groove; 502-Inner sealing ring; 503-Outer sealing ring; 6-Valve port; 7-Valve stem; 8-Locking disc; 801-Cover hole; 802-Retaining hole; 9-Locking pin. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, 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. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] like Figure 1 and Figure 2 As shown, this utility model discloses a coke oven pressure-type sealed switching flap valve, which includes a valve body 1 with an upper connecting flange 101 and a lower connecting flange 102. The upper connecting flange 101 is connected to the dust collection main pipe of the negative pressure dust removal system, and the lower connecting flange 102 is connected to the carbonization chamber.

[0021] The valve body 1 is a hollow structure, welded from high-quality structural steel to ensure its sealing effect. An inspection window 2 is located on one side of the valve body 1, and this window is sealed to the valve body 1 to maintain its airtightness. A valve port 6 at the bottom of the valve body 1 connects to the carbonization chamber. A valve plate 5 covers the upper end of the valve port 6, pressing down and sealing it to isolate the carbonization chamber from the dust collection main pipe. During coal loading and coke pushing, the valve plate 5 is opened, allowing the valve port 6 to connect the carbonization chamber to the dust collection main pipe, forming a dust conveying path.

[0022] like Figure 3 and Figure 4 As shown, in a preferred embodiment, a rotating shaft 3 is rotatably connected to one side of the valve body 1. Bearings and sealing sleeves are connected to both sides of the rotating shaft 3 at the connection points with the valve body 1 to prevent negative pressure leakage inside the valve body 1 during operation of the negative pressure dust removal system. A valve stem 7 is fixedly connected to the outside of the rotating shaft 3 to the valve body 1. The valve plate 5 is connected to the rotating shaft 3 via a swing arm 4. Thus, pushing the valve stem 7 causes the rotating shaft 3 to drive the swing arm 4 to rotate, allowing the valve plate 5 to rotate and close or open the valve port 6. The valve plate 5 is made of steel plate with a certain thickness and weight, and its weight ensures that the gravity of the valve plate 5 when pressed down will seal and close the valve port 6.

[0023] In a preferred embodiment, a locking disc 8 is fixedly connected to the side of the rotating shaft 3 near the valve stem 7. The locking disc 8 is used to lock the rotating shaft 3 to prevent the rotating shaft 3 and the valve plate 5 from swinging unexpectedly. At this time, the outer wall of the valve body 1 is provided with a locking blind hole 103. The locking disc 8 is connected to the locking blind hole 103 through a locking pin 9. Thus, after the locking pin 9 is inserted into the locking blind hole 103, the locking disc 8 and the rotating shaft 3 can be locked.

[0024] Specifically, the locking disc 8 has a cover hole 801 and several retaining holes 802. Only one cover hole 801 needs to be provided, while one or more retaining holes 802 can be provided. The locking pin 9 passes through the cover hole 801 or the retaining hole 802 and is inserted into the locking blind hole 103. When dust removal is not required and the valve plate 5 is closed on the valve port 6, the locking pin 9 is inserted into the locking blind hole 103 through the cover hole 801, which can ensure the stability of the valve plate 5 closed on the valve port 6 and ensure the sealing effect of the valve port 6. When dust removal is required, the valve rod 7 is pushed, and the rotating shaft 3 drives the swing arm 4 to rotate, so that the valve plate 5 rotates and opens the valve port 6 to a certain angle. Then, the locking pin 9 is inserted into the locking blind hole 103 through the retaining hole 802, so that the valve plate 5 maintains the opening angle with the valve port 6 and will not cause accidental rotation.

[0025] like Figure 5 As shown, in a preferred embodiment, the lower part of the valve plate 5 is provided with a locking groove 501 that matches the shape of the upper peripheral wall of the valve port 6. Both sides of the locking groove 501 are rounded to facilitate the locking groove 501 sealing the upper end of the valve port 6 when the valve plate 5 is pressed down. Furthermore, the valve plate 5 is less prone to deformation under high temperatures, preventing jamming between the valve plate 5 and the valve port 6. An inner sealing ring 502 and an outer sealing ring 503 are respectively provided on both sides of the locking groove 501. The inner sealing ring 502 and the outer sealing ring 503 are made of high-temperature resistant rubber rings. The inner sealing ring 502 and the outer sealing ring 503 seal the upper peripheral wall of the valve port 6 on both sides, thereby sealing the upper peripheral wall of the valve port 6 from both the inner and outer sides, further ensuring the sealing effect between the valve plate 5 and the valve port 6.

[0026] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A coke oven push-to-close switch flashboard valve, comprising a valve body (1) provided with an upper connecting flange (101) and a lower connecting flange (102), a valve port (6) is arranged at the lower part of the valve body (1), and a valve plate (5) is arranged on the upper end of the valve port (6), characterized in that: The valve body (1) is rotatably connected with a rotating shaft (3), the rotating shaft (3) extends to the outside of the valve body (1) and is fixedly connected with a valve rod (7), the valve plate (5) is connected with the rotating shaft (3) through a swing arm (4), the lower part of the valve plate (5) is provided with a clamping groove (501) matched with the shape of the upper end peripheral wall of the valve port (6), the two sides of the clamping groove (501) are respectively provided with an inner sealing ring (502) and an outer sealing ring (503), and the inner sealing ring (502) and the outer sealing ring (503) are respectively sealed with the two sides of the upper end peripheral wall of the valve port (6).

2. The push-to-close blank gate valve for coke ovens according to claim 1, characterized in that: The side, close to the valve rod (7), of the rotating shaft (3) is fixedly connected with a locking disc (8), and the outer wall of the valve body (1) is provided with a locking blind hole (103); the locking disc (8) is connected with the locking blind hole (103) through a locking column (9).

3. The push-to-close, sealed, switch flap valve for coke ovens of claim 2, wherein: The locking disc (8) is provided with a cover hole (801) and a plurality of retaining holes (802), and the locking column (9) passes through the cover hole (801) or the retaining hole (802) and is inserted into the locking blind hole (103).

4. The push-to-close, sealed-swap flapper valve for coke ovens of claim 1, wherein: The inner sealing ring (502) and the outer sealing ring (503) are made of high-temperature-resistant rubber rings.

5. The push-to-close, sealed-swap flapper valve for coke ovens of claim 1, wherein: The side of the valve body (1) is provided with an inspection window (2), and the inspection window (2) is sealingly connected with the valve body (1).

6. The push-to-close, sealed-swap flapper valve for coke ovens of claim 1, wherein: The two side edges of the clamping groove (501) are all chamfered.

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