A kind of anti-jamming swing crescent valve for boiler slagging pipeline

Abstract

The utility model relates to a boiler valve technical field, specifically disclose a kind of anti-jamming rotary swing crescent valve for boiler slag discharge pipeline, including valve body and valve seat, the medium passage is formed in the valve body inside;Valve body is movably connected with crescent valve plate, crescent valve plate is compatible with the inner wall of medium passage and moves in medium passage;Valve body is also provided with valve stem, and valve stem is connected with crescent valve plate;Valve body is also provided with the drive mechanism for driving valve stem to drive the movement of crescent valve plate, and drive mechanism drives the clockwise rotary swing of crescent valve plate, due to eccentric effect, the sealing extension end of valve plate is not perpendicular to the valve seat, but gradually wedged with certain angle of inclination, the wedge-shaped shearing action produced by eccentric rotary swing design, can actively cut off or remove the blocky material that can cause jam, fundamentally solve the core pain point of traditional valve under this working condition.

Description

Technical Field

[0001] This utility model relates to the field of boiler valve technology, specifically to an anti-jamming rotary crescent valve for boiler slag discharge pipes. Background Technology

[0002] The medium in the ash discharge pipe of a circulating fluidized bed boiler is high-temperature, highly abrasive ash slag, often mixed with sintered lumpy materials. Under these conditions, traditional gate valves, ball valves, or ordinary butterfly valves are prone to incomplete closure, sealing failure, or even malfunction due to lumpy materials getting stuck between the valve plate and seat. In emergency situations such as slag spraying or slag gravity flow, if the valve cannot close quickly due to jamming, a large amount of high-temperature ash slag will leak, seriously threatening personal and equipment safety, causing unplanned shutdowns, and resulting in huge economic losses.

[0003] Therefore, there is an urgent need for a special slag discharge valve that can adapt to harsh working conditions such as high temperature, high abrasion, and easy jamming, and has the ability to quickly cut off and self-clean. Utility Model Content

[0004] The purpose of this invention is to provide an anti-jamming swivel crescent valve for boiler slag discharge pipes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-jamming rotary crescent valve for boiler slag discharge pipes, comprising a valve body and a valve seat, wherein a medium channel is formed inside the valve body; a crescent-shaped valve plate is movably connected to the valve body, the crescent-shaped valve plate being adapted to the inner wall of the medium channel and moving within the medium channel; a valve stem is also provided on the valve body, the valve stem being connected to the crescent-shaped valve plate; and a drive mechanism is also provided on the valve body for driving the valve stem to move the crescent-shaped valve plate, thereby controlling the opening and closing of the valve body.

[0006] Furthermore, the valve stem is connected to the valve body via a bushing.

[0007] Furthermore, the driving mechanism is a manual worm gear mechanism, used to drive the valve stem to rotate on the valve body.

[0008] Furthermore, a sealing structure is provided between the valve stem and the valve body.

[0009] Furthermore, the sealing structure includes a packing gland and high-temperature packing disposed on the valve body, the packing gland and high-temperature packing being tightened by fastening bolts.

[0010] Furthermore, a sealing extension end is provided on one side of the crescent-shaped valve plate, and the sealing extension end is made of a high-temperature resistant material.

[0011] Furthermore, the valve body, crescent-shaped valve plate, and valve stem are all made of heat-resistant stainless steel.

[0012] Furthermore, connecting flanges are provided on both the upper and lower sides of the valve body.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The anti-jamming swivel crescent valve for boiler slag discharge pipes, through the cooperation between the valve body, valve seat, crescent-shaped valve plate, valve stem and drive mechanism, etc., when the valve needs to be closed, the drive mechanism drives the crescent-shaped valve plate to swivel clockwise. Due to the eccentric effect, the sealing extension end of the valve plate is not pressed vertically against the valve seat, but gradually wedged in at a certain angle. The wedge shearing action generated by the eccentric swivel design can actively cut off or remove blocky materials that may cause jamming, fundamentally solving the core pain point of traditional valves under this working condition.

[0014] Secondly, the crescent-shaped valve plate only needs to rotate about 90° to complete the action from fully open to fully closed, which has a fast response speed and can effectively deal with sudden accidents such as slag spraying, ensuring system safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the valve body in the open state provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the valve body in the closed state provided in an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Medium passage; 12. Valve seat; 2. Crescent-shaped valve plate; 21. Sealing extension end; 3. Valve stem; 4. Drive mechanism; 5. Bushing; 6. Sealing structure; 61. Packing gland; 62. High-temperature resistant packing; 63. Fastening bolt. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-3 This utility model provides a technical solution: an anti-jamming swivel crescent valve for boiler slag discharge pipes, including a valve body 1 and a valve seat 12. A medium channel 11 is formed inside the valve body 1. A crescent-shaped valve plate 2 is movably connected to the valve body 1. The crescent-shaped valve plate 2 is adapted to the inner wall of the medium channel 11 and moves within the medium channel 11. A valve stem 3 is also provided on the valve body 1, and the valve stem 3 is connected to the crescent-shaped valve plate 2. A drive mechanism 4 is also provided on the valve body 1 to drive the valve stem 3 to move the crescent-shaped valve plate 2, and to drive and control the opening and closing of the valve body 1.

[0020] Specifically, this anti-jamming swivel crescent valve for boiler slag discharge pipes includes a valve body 1 and a valve seat 12. Both the valve body 1 and valve seat 12 are cast from 310S stainless steel, possessing good high-temperature strength and corrosion resistance. A medium channel 11 is formed inside the valve body 1. The inner wall of the medium flow channel is precision-machined to form the valve seat 12, which mates with the crescent-shaped valve plate 2. The crescent-shaped valve plate 2, also made of 310S stainless steel, is movably connected to the valve body 1. The crescent-shaped valve plate 2 adapts to the inner wall of the medium channel 11 and moves within the medium channel 11. A valve stem 3 is also provided on the valve body 1, connected to the crescent-shaped valve plate 2. The valve stem 3 and the crescent-shaped valve plate 2 are fixedly connected by a keyway or welding. The rotation axis of the valve stem 3 is designed to be eccentrically positioned upwards and to one side relative to the centerline of the flow channel. The valve body 1 is also provided with a drive mechanism 4 for driving the valve stem 3 to move the crescent-shaped valve plate 2, which is used to drive and control the opening and closing of the valve body 1.

[0021] The rotation axis of the valve stem 3 is eccentrically set relative to the center line of the medium flow channel, so that during the closing process, the sealing extension end 21 of the crescent-shaped valve plate 2 produces a wedge-shaped cutting shearing action with the valve seat 12 provided on the valve body 1.

[0022] In the embodiments provided by this utility model, the valve stem 3 is connected to the valve body 1 through the bushing 5. Specifically, the bushing 5 is made of high-temperature resistant graphite or oil-free bronze to ensure flexible rotation at high temperatures.

[0023] In the embodiment provided by this utility model, the driving mechanism 4 is a manual worm gear mechanism, used to drive the valve stem 3 to rotate on the valve body 1. Through the worm gear mechanism, the valve stem 3 and the crescent-shaped valve plate 2 are rotated. When it is necessary to close the valve (e.g.) Figure 3As shown, the drive mechanism 4 rotates the crescent-shaped valve plate 2 clockwise. Due to the eccentric effect, the sealing extension end 21 of the valve plate does not press vertically against the valve seat 12, but gradually weaves in at a certain angle. During this process, any blocky material on the sealing surface will be forcibly sheared, broken, or pushed away by the leading edge of the valve plate, thereby achieving self-cleaning and ultimately making the sealing extension end 21 completely fit against the valve seat 12, achieving a tight seal. The wedge-shaped shearing action generated by the eccentric rotation design can actively cut off or remove blocky materials that may cause jamming, fundamentally solving the core pain point of traditional valves under this working condition.

[0024] In the embodiments provided by this utility model, a sealing structure 6 is also provided between the valve stem 3 and the valve body 1 to achieve dynamic sealing of the valve stem 3. The sealing structure 6 includes a packing gland 61 and a high-temperature resistant packing 62 provided on the valve body 1, specifically a flexible graphite packing. The packing gland 61 and the high-temperature resistant packing 62 are pressed together by fastening bolts 63.

[0025] In the embodiments provided by this utility model, a sealing extension end 21 is provided on one side of the crescent-shaped valve plate 2. The sealing extension end 21 is provided with a high-temperature resistant material, specifically a high-temperature resistant hard alloy layer or a weld overlay wear-resistant sealing material, to withstand the severe scouring of ash and slag.

[0026] In the embodiments provided by this utility model, the valve body 1, the crescent-shaped valve plate 2, and the valve stem 3 are all made of heat-resistant stainless steel.

[0027] In the embodiments provided by this utility model, the valve body 1 is provided with connecting flanges on both the upper and lower sides, and is connected to the channel through the connecting flanges to facilitate the use of the valve body 1.

[0028] It should be noted that all electrical equipment involved in this application can be powered by a storage battery or an external power source, and this application is equipped with a control system for controlling the operation of the entire equipment.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0030] 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crescent-shaped anti-jamming valve for boiler slag discharge pipes, comprising a valve body (1) and a valve seat (12), characterized in that: A medium channel (11) is formed inside the valve body (1). A crescent-shaped valve plate (2) is movably connected to the valve body (1). The crescent-shaped valve plate (2) is adapted to the inner wall of the medium channel (11) and moves within the medium channel (11). The valve body (1) is also provided with a valve stem (3), which is connected to the crescent-shaped valve plate (2); The valve body (1) is also provided with a drive mechanism (4) for driving the valve stem (3) to move the crescent-shaped valve plate (2), which is used to drive and control the opening and closing of the valve body (1).

2. The anti-jamming rotary crescent valve for boiler slag discharge pipes according to claim 1, characterized in that: The valve stem (3) is connected to the valve body (1) through the bushing (5).

3. The anti-jamming rotary crescent valve for boiler slag discharge pipes according to claim 2, characterized in that: The drive mechanism (4) is a manual worm gear mechanism, used to drive the valve stem (3) to rotate on the valve body (1).

4. The anti-jamming rotary crescent valve for boiler slag discharge pipes according to claim 1, characterized in that: A sealing structure (6) is also provided between the valve stem (3) and the valve body (1).

5. A crescent-shaped anti-jamming valve for boiler slag discharge pipes according to claim 4, characterized in that: The sealing structure (6) includes a packing gland (61) and a high-temperature packing (62) disposed on the valve body (1), and the packing gland (61) and the high-temperature packing (62) are tightened by fastening bolts (63).

6. The anti-jamming rotary crescent valve for boiler slag discharge pipes according to claim 1, characterized in that: The crescent-shaped valve plate (2) has a sealing extension end (21) on one side, and the sealing extension end (21) is made of a high-temperature resistant material.

7. The anti-jamming rotary crescent valve for boiler slag discharge pipes according to claim 1, characterized in that: The valve body (1), crescent-shaped valve plate (2) and valve stem (3) are all made of heat-resistant stainless steel.

8. A crescent-shaped anti-jamming valve for boiler slag discharge pipes according to claim 1, characterized in that: The valve body (1) is provided with connecting flanges on both the upper and lower sides.

Images