Air-locking discharge valve for suspension preheater

Abstract

The utility model discloses an airlock discharge valve for a suspension preheater, which comprises a shell and turning plates arranged in the shell in pairs, each turning plate is rotatably connected with the shell through a corresponding rotating shaft, each rotating shaft is provided with an extension part extending outwards, the end part of the extension part of each rotating shaft is connected with a pressing rod, the pressing rod is provided with a balancing weight, and the balancing weight is arranged on the shell. The limiting block is arranged in the valve body, the two ends of the limiting block are fixedly connected with the inner side wall of the valve body, and the limiting block is parallel to the rotating shaft in the spatial position; the corresponding side faces of the turning plates abut against the lower end faces of the limiting blocks, and the pressing rods are located on the outer sides of the connecting flanges. Under the lever action of the pressing rod and the balancing weight, when materials are accumulated to a certain degree and enough pressure is applied to the turning plate, the turning plate can rotate around the rotating shaft under the action of the pressure, so that the discharging opening is opened, and automatic discharging of the materials is achieved. After the materials are discharged, the turning plate automatically resets under the gravity action of the balancing weight, the discharging port is closed again, and the air locking function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of discharge valves, and more specifically, to an air-locking discharge valve for a suspension preheater. Background Art

[0002] In the complex process of material drying, the drying furnace is the core equipment, and its internal temperature control and airflow management are directly related to the drying efficiency and product quality. However, the drying furnaces in the prior art often face a series of challenges in actual operation, especially in high-temperature environments, where the complexity of the airflow dynamics is particularly significant. Specifically, the high temperature environment in the furnace causes the hot air flow to rise rapidly, while at the same time the material is continuously transported into the furnace, which easily leads to the phenomenon of hot air backflow. This backflow not only causes the frequent exchange of hot and cold air in the furnace, significantly reducing the effective working temperature of the furnace, but also greatly affects the thermal efficiency and uniformity of the drying process, thereby extending the drying cycle and increasing energy consumption.

[0003] In addition, existing unloading devices, including the new air-locking unloading valve disclosed in Patent No. CN202021420382.0, although they have achieved the automatic unloading of materials to a certain extent, their design still has obvious deficiencies. This type of unloading valve mainly relies on the cooperation of the motor and the impeller to drive the unloading process. Under long-term high-load operation, this mechanical structure is prone to severe wear of the motor, which not only reduces the service life of the equipment, but also increases maintenance costs and downtime. More importantly, once the motor fails, it is often difficult to achieve quick replacement due to its complex installation structure and compact spatial layout. This not only affects the continuous operation of the production line, but may also cause material accumulation and blockage, further exacerbating production losses. Utility Model Content

[0004] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described below.

[0005] In order to achieve these purposes and other advantages according to the utility model, an air-locking discharge valve for a suspension preheater is provided, comprising: a shell, the shell being a hollow structure, connecting flanges arranged above and below the shell, flaps arranged in pairs inside the shell, each flap being rotatably connected to the shell via a corresponding rotating shaft, both ends of the rotating shaft being simultaneously passed through two opposite side walls of the shell, one end of each rotating shaft having an extension extending outward, an end portion of each rotating shaft extension being connected to a pressure rod, the pressure rod and the rotating shaft being perpendicular to each other in the spatial direction, a counterweight being provided at one end of the pressure rod away from the rotating shaft, a limit block being provided inside the valve body, the two ends of the limit block being fixedly connected to the inner wall of the valve body, and the limit block and the rotating shaft being parallel to each other in spatial position;

[0006] The corresponding side surfaces of the flap and the lower surface of the limit block abut against each other, and the pressure rod is located on the outside of the connecting flange.

[0007] Preferably, the counterweight block is provided with a through hole for the pressure rod to extend into;

[0008] A fixing hole is provided on one side wall of the through hole, a fixing piece is threadedly connected to the fixing hole, and the lower end of the fixing piece is tightly pressed against the side wall of the pressure rod.

[0009] Preferably, the rotating shaft is provided with shaft sleeves in pairs, and the shaft sleeves are located outside the shell.

[0010] Preferably, it further comprises: a plurality of blocking bars arranged on the inner side wall of the shell for blocking the gap between the flap and the inner side wall of the shell, and a baffle arranged between the two side walls of the rotating shaft;

[0011] One side of the baffle is fixedly connected to the inner wall of the shell, and the other side has a bent portion bent downward, the lower surface of the bent portion and the upper surface of the flap abut against each other, and the rotating shaft is located on the inner side of the baffle.

[0012] Preferably, the cross section of the housing is square.

[0013] The present invention has at least the following beneficial effects: Through the lever action of the pressure rod and the counterweight, when material accumulates to a certain level and exerts sufficient pressure on the flap, the flap rotates about the axis under the pressure, causing the material to fall between the flaps, achieving automatic material discharge. After the material is discharged, the flap automatically resets under the gravity of the counterweight, reclosing the discharge port and achieving a wind-locking function.

[0014] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a side view of the overall structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the space of the baffle, limit block and baffle of the utility model;

[0018] Figure 4 It is a cross-sectional view of the present utility model.

[0019] Markings in the figure: 1. Shell, 2. Connecting flange, 3. Flap, 4. Rotating shaft, 5. Pressure rod, 6. Counterweight, 7. Limit block, 8. Fixing hole, 9. Bushing, 10. Baffle, 11. Baffle, 12. Fixing part. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0021] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0022] It should be noted that in the description of this utility model, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings. These are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" 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 communication between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, in the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] like Figure 1The air-lock discharge valve for a suspension preheater shown in the figure comprises: a shell 1, which is a hollow structure, with connecting flanges 2 arranged above and below the shell 1, and flaps 3 arranged in pairs inside the shell 1, each flap 3 being rotatably connected to the shell 1 via a corresponding rotating shaft 4, with both ends of the rotating shaft 4 simultaneously passing through two opposite side walls of the shell 1, one end of each rotating shaft 4 having an outwardly extending extension, and the end of each extended portion of the rotating shaft 4 being connected to a pressure rod 5, the pressure rod 5 and the rotating shaft 4 being perpendicular to each other in the spatial direction, a counterweight 6 being provided at the end of the pressure rod 5 away from the rotating shaft 4, and a limit block 7 being provided inside the valve body, the two ends of the limit block 7 being fixedly connected to the inner wall of the valve body, and the limit block 7 and the rotating shaft 4 being parallel to each other in spatial position;

[0026] The corresponding side surface of the flap 3 abuts against the lower surface of the limit block 7 , and the pressure rod 5 is located outside the connecting flange 2 .

[0027] Working principle:

[0028] In actual processes, because the device is used for chemical raw materials, which are highly corrosive, if electronic components are used to open and close the valve, the electronic components are easily damaged during long-term use, and the reliability and stability of the equipment are low. Mechanical, non-electronic control methods are used to control the opening and closing of the valve. These methods do not rely on electronic components, reducing the risk of damage due to corrosion. The shell 1 is connected to the external pipeline through the upper and lower connecting flanges 2. The material enters the shell 1 from the top through the external pipeline. The counterweight block 6 applies a certain torque to the rotating shaft 4 through the pressure rod 5. A counterweight block 6 is provided at the end of the pressure rod 5 away from the rotating shaft 4 to further increase the leverage effect and ensure the stability and reliability of the flap 3. Keep the flap 3 closed. Driven by the rotating shaft 4, the corresponding sides of the two flaps 3 abut against the lower surface of the stop block 7, forming a cavity between the two flaps 3 and the stop block 7 for temporary material storage. When a certain amount of material accumulates between the flaps 3, its weight exceeds that of the counterweight 6, and the flaps 3 begin to rotate about the rotating shaft 4, gradually leaving the closed position. As the flaps 3 rotate, the material begins to flow out through the discharge valve under the action of gravity. When a certain amount of material has flowed out and its weight is less than that of the counterweight 6, the flaps 3 close under the drive of the pressure rod 5 on the rotating shaft 4. After unloading is completed, the sealing of the external air duct is guaranteed.

[0029] In the above technical solution, the counterweight 6 is provided with a through hole for the pressure rod 5 to extend into. A fixing hole 8 is provided on one sidewall of the through hole, and a fixing member 12 is threadedly connected to the fixing hole 8. The lower end of the fixing member 12 abuts against the sidewall of the pressure rod 5. The fixing member 12 can be either a bolt or a screw. With this technical solution, the counterweight 6 can be slidably connected to the pressure rod 5 through the through hole in the counterweight 6. The position of the counterweight 6 can be adjusted according to actual work needs, thereby applying different torques to the rotating shaft 4, thereby controlling the weight required to open the flap 3 and facilitating the complete release of the material inside the flap 3. The fixing hole 8 provided on one sidewall of the through hole is threadedly connected to the fixing member 12. The lower end of the fixing member 12 abuts against the sidewall of the pressure rod 5. This makes the connection between the pressure rod 5 and the counterweight 6 more stable and reliable, preventing loosening due to vibration or impact during use. At the same time, the threaded fixing member 12 is also easy to install and disassemble, thereby improving work efficiency.

[0030] In the above technical solution, the shaft 4 is provided with a pair of bushings 9, which are located on the outside of the housing 1. With this technical solution, because the sidewalls of the housing 1 are relatively thin, installing the bushings 9 on the inside of the housing 1 would affect the layout space of the flap 3 and limit the layout and rotation range of the flap 3. Moving the bushings 9 to the outside of the housing 1 maximizes the use of the space within the housing 1, ensuring that the flap 3 can rotate smoothly and achieve the desired opening and closing effect. The bushings 9 reduce friction between the shaft 4 and the housing 1, while protecting the shaft 4 from wear and corrosion. Installing the bushings 9 on the outside of the housing 1 also facilitates installation and maintenance. During installation, one end of the bushing 9 can be first fixed to the shaft 4, and then the shaft 4 can be inserted into the sidewall of the housing 1. The bushing 9 is then installed on the other end of the shaft 4. If the bushing 9 has a problem and needs to be replaced, it can be replaced without disassembling the entire housing 1, thereby reducing maintenance costs and time.

[0031] The above technical solution also includes: a plurality of baffles 10 disposed on the inner wall of the housing 1 for sealing the gap between the flap 3 and the inner wall of the housing 1; and a baffle 11 disposed between the two sidewalls of the rotating shaft 4. The baffle 11 is fixedly connected to the inner wall of the housing 1 on one side and has a downwardly bent portion on the other side. The lower surface of the bent portion abuts against the upper surface of the flap 3. The rotating shaft 4 is located inside the baffle 11. With this technical solution, during actual use of the airlock discharge valve, to prevent friction and interference generated by the rotation of the rotating shaft 4 and flap 3, a certain gap is maintained between the flap 3 and the inner wall of the housing 1. There is also a certain gap at the rotating shaft 4. The plurality of baffles 10 disposed on the inner wall of the housing 1 primarily serves to seal the gap between the flap 3 and the inner wall of the housing 1. Since the flap 3 needs to maintain a certain gap with the inner wall of the housing 1 during rotation to prevent direct friction and jamming, these gaps can cause material leakage. The installation of baffles 10 effectively prevents material from escaping through these gaps, improving the sealing performance of the airlock discharge valve. A baffle 11 is installed between the two sidewalls of the rotating shaft 4. This baffle 11 is not only fixedly connected to the inner sidewall of the housing 1, but also has a downwardly curved portion. The lower surface of this curved portion abuts against the upper surface of the flap 3, forming an additional support and sealing structure. The installation of baffles 11 strengthens the sealing of the rotating shaft 4, preventing material from leaking through the gap between the rotating shaft 4 and the housing 1.

[0032] In the above technical solution, the cross section of the housing 1 is square. With this technical solution, the square cross section provides the housing 1 with higher structural stability and also improves space utilization.

[0033] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An air lock discharge valve for a suspension preheater, comprising: The shell is a hollow structure, with connecting flanges arranged above and below the shell, and flaps arranged in pairs inside the shell, each flap is rotatably connected to the shell through a corresponding rotating shaft, and both ends of the rotating shaft are simultaneously passed through two opposite side walls of the shell, characterized in that one end of each rotating shaft has an extension portion extending outward, and the end of each rotating shaft extension portion is connected to a pressure rod, the pressure rod and the rotating shaft are perpendicular to each other in the spatial direction, a counterweight is provided at the end of the pressure rod away from the rotating shaft, and a limit block is arranged inside the valve body, the two ends of the limit block are fixedly connected to the inner wall of the valve body, and the limit block and the rotating shaft are parallel to each other in spatial position; The corresponding side surfaces of the flap and the lower surface of the limit block abut against each other, and the pressure rod is located on the outside of the connecting flange.

2. The air lock discharge valve for suspension preheater according to claim 1, characterized in that: The counterweight block is provided with a through hole for the pressure rod to extend into; A fixing hole is provided on one side wall of the through hole, a fixing piece is threadedly connected to the fixing hole, and the lower end of the fixing piece is tightly pressed against the side wall of the pressure rod.

3. The air lock discharge valve for suspension preheater according to claim 1, characterized in that: The rotating shaft is provided with shaft sleeves in pairs, and the shaft sleeves are located outside the shell.

4. The air lock discharge valve for suspension preheater according to claim 1, characterized in that: Also includes: A plurality of baffles provided on the inner wall of the housing for sealing the gap between the flap and the inner wall of the housing, and a baffle provided between the two side walls of the rotating shaft; One side of the baffle is fixedly connected to the inner wall of the shell, and the other side has a bent portion bent downward, the lower surface of the bent portion and the upper surface of the flap abut against each other, and the rotating shaft is located on the inner side of the baffle.

5. The air lock discharge valve for suspension preheater according to claim 1, characterized in that: The cross section of the shell is square.

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