Novel pneumatic ceramic double-inserting-plate small-hole valve

Abstract

The utility model relates to the technical field of gas furnace powder returning and emptying pipelines and slag discharging and emptying, and provides a novel pneumatic ceramic double-inserting-plate small-hole valve which comprises an air cylinder, a T-shaped pull rod, a valve element, a communicating pipe and a valve seat. A ceramic sealing face and a drilling pressure relief structure are adopted, so that the service life of the small-hole valve is greatly prolonged, and the service life of the small-hole valve is greatly prolonged. The operation reliability and stability of equipment are essentially improved, so that economic benefits are remarkable, for example, replacement of a small-hole valve is completely stopped within a short time after transformation, tiny consumption of spare parts is achieved, the equipment replacement frequency is reduced, and maintenance human input and shutdown loss are reduced; pressure is released rapidly after small-hole slow release, the pressure gradient is effectively controlled, the risk of erosion damage of high-speed airflow to pipelines / equipment is eliminated, the environmental benefits are improved, the problem of medium leakage is solved, and the field dust concentration is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas furnace pulverized coal return venting pipeline and slag discharge venting technology, specifically a novel pneumatic ceramic double-slot orifice valve. Background Technology

[0002] The coal gasifier return venting pipeline and ash discharge venting system are key technical units in coal gasification processes to ensure safe equipment operation and environmental compliance. Their technical background stems from the fact that when a coal gasifier gasifies solid fuels under high temperature and pressure, it easily produces incompletely reacted coal particles and molten ash. If not handled promptly, this can lead to furnace blockage, pressure imbalance, or equipment corrosion. The return venting pipeline uses positive pressure suction or mechanical conveying to return the insufficiently gasified coal particles to the furnace for secondary combustion, improving fuel utilization and avoiding the explosion risk caused by dust accumulation. The ash discharge venting system uses dry ash discharge technology to rapidly cool and discharge high-temperature molten ash, preventing coking inside the furnace. Simultaneously, it collects harmful gases (such as CO and H2S) through a closed pipeline and introduces them into a purification device, reducing pollutant emissions. The synergistic effect of these two systems not only maintains the continuous and stable operation of the gasifier but also reduces energy consumption through waste heat recovery and dust re-combustion, while meeting the environmental protection requirements for ultra-low emissions of industrial waste gas. This provides crucial technical support for the efficient and clean development of coal gasification processes.

[0003] However, the pneumatic valves for the pulverized coal return venting pipeline and the ash discharge venting pipeline of the gasifier are usually pneumatic butterfly valves made of hard alloy. The original venting holes and sealing surfaces on the butterfly valves will wear out and enlarge after less than two months of use. This will eventually lead to the valve completely wearing out and the inability to control the pressure relief rate of the ash-containing gas, causing the pulverized coal return system to malfunction. Maintenance personnel need to frequently repair and weld the venting pipeline of the intermediate lock hopper, which is time-consuming and labor-intensive. At the same time, the site environment cannot be kept clean and tidy. In addition, frequent replacement of the pulverized coal return venting hole valve leads to increased spare parts costs, and the gas production cost also increases accordingly. Summary of the Invention

[0004] The purpose of this utility model is to provide a novel pneumatic ceramic double-plate small-hole valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel pneumatic ceramic double-slot valve, comprising a cylinder, a "T"-shaped pull rod valve core, a connecting pipe, and a valve seat. The cylinder is internally connected to a cylinder piston. One end of a cylinder rod is fixedly connected through the cylinder's piston shaft. A "T"-shaped pull rod is threaded to the lower end of the other end of the cylinder rod. The valve core is fixedly connected to both sides of the "T"-shaped pull rod. The valve seat is fixedly connected to the lower part of the cylinder. The valve core is slidably connected inside the valve seat. The connecting pipe is snapped into both sides of the valve seat. One side of the connecting pipe is in contact with the valve core. The connecting pipe is made of wear-resistant ceramic material.

[0006] Preferably, the valve core includes a valve body, a vent hole, a valve plate, and a bayonet. The valve plate is adhered to one side of the valve body, the vent hole is provided on the surface of the valve body, and a bayonet is provided at the center of the other side of the valve body.

[0007] Preferably, the valve plate is annular and the valve plate material is wear-resistant ceramic.

[0008] Preferably, the bayonet opening corresponds to the protrusions on both sides of the lower end of the "T"-shaped pull rod.

[0009] Preferably, the connecting pipe includes a pipe body and a pipe edge, with the pipe edge fixedly connected to one side of the pipe body, and the outer diameter of the pipe body matching the inner diameter of the openings on both sides of the valve seat.

[0010] Preferably, the valve seat includes a valve seat body, a flange, and an annular groove. The valve seat body is fixedly connected to the lower part of the cylinder. Holes are provided on both sides of the interior of the valve seat body. The flange is fixedly connected to both sides of the valve seat body. An annular groove is provided on one side of the inner hole of the valve seat body. The shape of the annular groove matches the pipe edge.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention significantly extends the service life of small-hole valves by employing a ceramic sealing surface and a drilled pressure relief structure. Periodic inspections revealed no obvious wear on the valve core and sealing surface, resulting in a substantial improvement in equipment reliability and stability. This leads to significant economic benefits, such as completely eliminating the need for small-hole valve replacements within a short period after the modification, minimizing spare parts consumption, reducing equipment replacement frequency, and lowering maintenance manpower and downtime losses. The innovative pressure relief interlock control program, through graded pressure relief—slow pressure relief followed by rapid pressure relief—effectively controls the pressure gradient, eliminating the risk of erosion damage to pipelines / equipment from high-speed airflow. Furthermore, it improves environmental benefits by resolving media leakage issues and significantly reducing on-site dust concentration. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is an exploded view of the valve seat structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the side structure of the valve core of this utility model;

[0016] Figure 4 This is a schematic diagram of the front structure of the valve core of this utility model;

[0017] Figure 5 This is a three-dimensional structural diagram of the connecting pipe of this utility model;

[0018] Figure 6 This is a schematic diagram of the cross-sectional structure of the connecting pipe of this utility model;

[0019] Figure 7 This is a schematic diagram of the side cross-sectional structure of the valve seat of this utility model;

[0020] Figure 8 This is a schematic diagram of the front structure of the valve seat of this utility model.

[0021] In the diagram: 1. Cylinder; 2. Cylinder piston; 3. Cylinder rod; 4. "T"-shaped tie rod; 5. Valve core; 501. Valve body; 502. Vent hole; 503. Valve plate; 504. Bayonet; 6. Connecting pipe; 601. Pipe body; 602. Pipe edge; 7. Valve seat; 701. Valve seat body; 702. Flange; 703. Annular groove. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] 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.

[0025] 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.

[0026] Please see Figure 1-8 This utility model provides an embodiment of a novel pneumatic ceramic double-slot valve, comprising a cylinder 1, a "T"-shaped pull rod 4, a valve core 5, a connecting pipe 6, and a valve seat 7. A cylinder piston 2 is movably connected inside the cylinder 1. One end of a cylinder rod 3 is fixedly connected through the cylinder 1 at the axis of the cylinder piston 2. The other end of the cylinder rod 3 is threadedly connected to the "T"-shaped pull rod 4. The valve core 5 is fixedly connected to both sides of the "T"-shaped pull rod 4. The valve seat 7 is fixedly connected to the bottom of the cylinder 1. The valve core 5 is slidably connected inside the valve seat 7. The connecting pipe 6 is snapped into both sides inside the valve seat 7. One side of the connecting pipe 6 is in contact with the valve core 5. The connecting pipe 6 is made of wear-resistant ceramic material.

[0027] Furthermore, the valve core 5 includes a valve body 501, a vent hole 502, a valve plate 503, and a bayonet 504. The valve plate 503 is adhered to one side of the surface of the valve body 501, and the vent hole 502 is provided on the surface of the valve body 501. A bayonet 504 is provided at the axial center of the other side of the surface of the valve body 501. The bayonet 504 can cooperate with the "T"-shaped tie rod 4 through a locking screw, so that the valve body 501 can be fixed on both sides of the "T"-shaped tie rod 4, so that the "T"-shaped tie rod 4 can control the valve core 5 to move inside the valve seat 7.

[0028] Furthermore, the valve plate 503 is annular and made of wear-resistant ceramic. The use of ceramic material enhances the device's wear resistance and has a significant effect in actual use.

[0029] Furthermore, the design of the bayonet 504 corresponds to the protrusions on both sides of the lower end of the "T"-shaped pull rod 4.

[0030] Furthermore, the connecting pipe 6 includes a pipe body 601 and a pipe edge 602. The pipe edge 602 is fixedly connected to one side of the pipe body 601. The outer diameter of the pipe body 601 matches the inner diameter of the openings on both sides of the valve seat 7. The connecting pipe 6 is also made of wear-resistant ceramic material to enhance the wear resistance of the contact surface. In addition, the setting of the pipe edge 602 allows the connecting pipe 6 to be fixed inside the valve seat 7 through the annular groove 703, making the structure more stable.

[0031] Furthermore, the valve seat 7 includes a valve seat body 701, a flange 702, and an annular groove 703. The valve seat body 701 is fixedly connected to the lower part of the cylinder 1. Holes are provided on both sides of the interior of the valve seat body 701. The flange 702 is fixedly connected to both sides of the valve seat body 701. An annular groove 703 is provided on one side of the inner hole of the valve seat body 701. The shape of the annular groove 703 matches the pipe edge 602. The flange 702 can be connected to the connecting pipe to realize the passage.

[0032] Working principle:

[0033] First, when compressed air is supplied to cylinder 1 from an external air source, cylinder piston 2 moves downward along the inner wall of cylinder 1 under air pressure. Piston 2 drives cylinder rod 3, which is fixed to its axis, to move downward synchronously, thereby driving the threaded "T"-shaped pull rod 4 to move downward. Second, the "T"-shaped pull rod 4 engages with the valve core 5's locking slots 504 via its two side protrusions, causing the valve cores 5 on both sides to slide along the inside of the valve seat body 701. The valve body 501 of the valve core 5 moves with the pull rod 4, gradually fitting into the connecting pipe 6. Simultaneously, the vent 502 gradually aligns with the flow channel of the connecting pipe 6, opening the flow channel and allowing the medium to flow. Then, when the valve core 5 moves completely to the open position, the vent hole 502 is fully connected to the pipe body 601 of the connecting pipe 6. The medium enters the valve seat 7 through the pipe body 601 and forms a passage through the vent hole 502. The valve plate 503 is made of wear-resistant ceramic material, which reduces friction loss with the pipe body 601 during sliding. Finally, when the air source supplies air in the reverse direction, the cylinder piston 2 drives the cylinder rod 3 and the "T"-shaped tie rod 4 to move upward, and the valve core 5 is reset. The valve plate 503 of the valve body 501 presses the pipe body 601 of the connecting pipe 6 again. At the same time, the vent hole 502 is misaligned with the flow channel to achieve a sealed closure and fully open the passage.

[0034] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel pneumatic ceramic double-slot valve, comprising a cylinder (1), a "T"-shaped pull rod (4), a valve core (5), a connecting pipe (6), and a valve seat (7), characterized in that: The cylinder (1) is internally connected to a cylinder piston (2). The cylinder piston (2) is fixedly connected to one end of the cylinder rod (3) through the cylinder (1) at its axis. The other end of the cylinder rod (3) is threadedly connected to a "T"-shaped tie rod (4). The two sides of the "T"-shaped tie rod (4) are fixedly connected to valve cores (5). The bottom of the cylinder (1) is fixedly connected to a valve seat (7). The valve core (5) is slidably connected inside the valve seat (7). The two sides of the valve seat (7) are snapped with connecting pipes (6). One side of the connecting pipe (6) is in contact with the valve core (5). The connecting pipe (6) is made of wear-resistant ceramic material.

2. The novel pneumatic ceramic double-slot orifice valve according to claim 1, characterized in that: The valve core (5) includes a valve body (501), a vent hole (502), a valve plate (503), and a bayonet (504). The valve plate (503) is adhered to one side of the valve body (501), the vent hole (502) is provided on the surface of the valve body (501), and the bayonet (504) is provided at the center of the other side of the valve body (501).

3. A novel pneumatic ceramic double-slot orifice valve according to claim 2, characterized in that: The valve plate (503) is annular, and the valve plate (503) is made of wear-resistant ceramic.

4. A novel pneumatic ceramic double-slot orifice valve according to claim 2, characterized in that: The bayonet (504) corresponds to the protrusions on both sides of the lower end of the "T"-shaped pull rod (4).

5. A novel pneumatic ceramic double-slot orifice valve according to claim 1, characterized in that: The connecting pipe (6) includes a pipe body (601) and a pipe edge (602). The pipe edge (602) is fixedly connected to one side of the pipe body (601). The outer diameter of the pipe body (601) matches the inner diameter of the openings on both sides of the valve seat (7).

6. A novel pneumatic ceramic double-slip orifice valve according to claim 1, characterized in that: The valve seat (7) includes a valve seat body (701), a flange (702), and an annular groove (703). The valve seat body (701) is fixedly connected to the bottom of the cylinder (1). Holes are provided on both sides of the interior of the valve seat body (701). The flange (702) is fixedly connected to both sides of the valve seat body (701). An annular groove (703) is provided on one side of the inner hole of the valve seat body (701). The shape of the annular groove (703) matches the pipe edge (602).

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