Air door opening and closing mechanism, air door device and grain dryer

Abstract

The application relates to the technical field of grain drying equipment, and discloses a damper opening and closing mechanism, a damper device and a grain dryer. The damper opening and closing mechanism comprises a mounting seat, an opening and closing driving assembly and a locking assembly. The mounting seat is provided with a movable groove. The movable groove comprises a main groove body, a normally open groove body and a normally closed groove body. The main groove body is provided with a normally open position and a normally closed position which are arranged at intervals. The normally open groove body is arranged in correspondence with the normally open position and is communicated with the main groove body. The normally closed groove body is arranged in correspondence with the normally closed position and is communicated with the main groove body. The opening and closing driving assembly is used for driving connection with a damper rotating shaft. A sliding buckle is arranged on the opening and closing driving assembly. The sliding buckle is slidably arranged in the movable groove. The locking assembly is used for driving the sliding buckle in the normally open position or the normally closed position to enter the normally open groove body or the normally closed groove body. The damper opening and closing mechanism can reduce the non-expected swinging of the damper, can make the equipment continuously and stably operate, and can improve the overall operation efficiency.

Description

Technical Field

[0001] This application belongs to the technical field of grain drying equipment, specifically relating to a damper opening and closing mechanism, a damper device, and a grain dryer. Background Technology

[0002] As the core equipment of a drying center, the performance of a grain dryer directly determines the efficiency of the drying operation and the quality of the grain. In the existing dryer structure, each dryer is independently equipped with hot air doors and cold air doors to achieve the switching between drying and ventilation modes: in drying mode, the hot air door needs to be opened and the cold air door closed to introduce hot air to dry the grain layer; in ventilation mode, the hot air door is closed and the cold air door is opened for cooling or dehumidification.

[0003] However, existing dampers lack reliable locking or self-holding structures. Under conditions such as fan start-up and shutdown, airflow fluctuations, or external vibrations, the dampers are prone to unexpected swaying, which seriously affects the stability of drying temperature and reduces operational efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a damper opening and closing mechanism, a damper device, and a grain dryer, which aims to solve the problems of damper swing and inability to lock in the prior art.

[0005] To achieve the above objectives, this application provides a damper opening and closing mechanism, comprising: The mounting base is provided with a movable slot, which includes a main slot body, a normally open slot body and a normally closed slot body. The main slot body has normally open and normally closed positions arranged at intervals. The normally open slot body is arranged corresponding to the normally open position and is connected to the main slot body. The normally closed slot body is arranged corresponding to the normally closed position and is connected to the main slot body. An opening and closing drive assembly is used to drive the damper shaft. The opening and closing drive assembly is provided with a sliding buckle, which is slidably disposed in the movable groove. A locking component is disposed on the opening and closing drive component. The locking component is used to drive the sliding buckle located in the normally open position into the normally open slot, or to drive the sliding buckle located in the normally closed position into the normally closed slot.

[0006] In some embodiments, the opening and closing drive assembly includes a swing arm module, the swing arm module including a first swing rod and a second swing rod, the first swing rod being used for drive connection with the damper shaft, and the second swing rod being hinged to the first swing rod and provided with the sliding buckle; The locking assembly connects the first rocker arm and the second rocker arm, and is used to drive the second rocker arm to rotate relative to the first rocker arm in the normally open or normally closed position, so that the sliding buckle can slide from the main groove into the corresponding normally open groove or normally closed groove.

[0007] In some embodiments, the locking component is configured as an elastic component that provides elastic tension between the first and second levers.

[0008] In some embodiments, the normally open slot and the normally closed slot are symmetrically distributed at opposite ends of the main slot, and the outlines of the normally open slot and the normally closed slot at the slot opening are respectively connected to the outline of the main slot by an arc transition.

[0009] In some embodiments, two sliding buckles are provided; the two sliding buckles are located on the same virtual circle, and the arc curvature of the virtual circle is consistent with the arc curvature of the main groove.

[0010] In some embodiments, there are two normally open slots, namely a first normally open slot and a second normally open slot. The first normally open slot and the second normally open slot are respectively disposed on opposite sides of the main slot, and the slot openings of the first normally open slot and the second normally open slot are connected to the main slot.

[0011] In some embodiments, there are two normally closed slots, namely a first normally closed slot and a second normally closed slot. The first normally closed slot and the second normally closed slot are respectively disposed on opposite sides of the main slot, and the slot openings of the first normally closed slot and the second normally closed slot are connected to the main slot.

[0012] In some embodiments, the second rocker arm is provided with a hinge portion that is rotatably connected to the first rocker arm, the hinge portion being located between the two sliding buckles.

[0013] In some embodiments, the end of the second swing arm away from the first swing arm is provided with a traction part, and the opening and closing drive assembly further includes a pull rope traction module, which is connected to the traction part via a traction pull rope.

[0014] A second aspect of this application provides a damper device, including a door frame, a damper, and a damper opening and closing mechanism as described in any of the above embodiments. The damper is rotatably mounted on the door frame via a damper pivot, the damper opening and closing mechanism is mounted on the door frame, and the opening and closing drive assembly is drively connected to the damper pivot.

[0015] In some embodiments, the damper includes at least one cold air damper and at least one hot air damper, and the cold air damper and the hot air damper are respectively provided with damper opening and closing mechanisms; When multiple cold air doors are provided, the door device further includes a cold air door linkage rod, which is drivenly connected to the door shaft of each cold air door and is used to drive multiple cold air doors to open and close synchronously. When multiple hot air doors are provided, the door device further includes a hot air door linkage rod, which is drivenly connected to the door shaft of each hot air door to drive the multiple hot air doors to open and close synchronously.

[0016] A third aspect of this application provides a grain dryer, including the damper opening and closing mechanism or the damper device in any of the above embodiments.

[0017] The above technical solution involves setting up a locking component in conjunction with a movable slot structure containing normally open and normally closed slots. When the sliding latch reaches the normally open or normally closed position, the locking component drives it into the corresponding normally open or normally closed slot, forming a mechanical self-locking mechanism in either the normally open or normally closed state. This avoids unexpected oscillations of the damper (such as accidental closing or opening of the damper), which could lead to drying interruptions, temperature imbalances, or energy waste, ensuring continuous and stable operation of the equipment and thus improving overall operational efficiency.

[0018] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the damper opening and closing mechanism in some embodiments of this application; Figure 2 A schematic diagram of the mounting base in a damper opening and closing mechanism provided for some embodiments of this application; Figure 3 A front view of the second swing arm in the damper opening and closing mechanism provided for some embodiments of this application; Figure 4 for Figure 3 Left view of the second pendulum shown; Figure 5 for Figure 3 The top view of the second pendulum shown; Figure 6 This is a schematic diagram of the damper device in some embodiments of this application, showing the structure of all damper openings; Figure 7A partial structural diagram of a damper device with a damper opening and closing mechanism installed in some embodiments of this application; Figure 8 This is a schematic diagram of the damper device in some embodiments of this application where all dampers are closed.

[0020] Explanation of reference numerals in the attached figures A0, damper device; P1, normally open position; P2, normally closed position; 100. Damper opening and closing mechanism; 110. Mounting base; 111. Main slot body; 112. Normally open slot body; 112a. First normally open slot body; 112b. Second normally open slot body; 113. Normally closed slot body; 113a. First normally closed slot body; 113b. Second normally closed slot body; 120. Opening and closing drive assembly; 120a. Swing arm module; 121. First swing arm; 122. Second swing arm; 123. Sliding buckle; 1221. Secondary rod body; 1222. Main rod body; 1223. Traction part; 1224. Hinge part; 124. Traction rope; 130. Locking assembly; 200. Door frame; 300, damper; 300a, cold air damper; 300b, hot air damper; 310, damper pivot; 400a, Cold air damper linkage rod; 400b, Hot air damper linkage rod; 400c, Pull rod; 500. Pulley. Detailed Implementation

[0021] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] See Figure 1 , Figure 2 and Figure 7 This application provides a damper opening and closing mechanism 100, including a mounting base 110, an opening and closing drive assembly 120, and a locking assembly 130.

[0023] The mounting base 110 is provided with a movable slot, which includes a main slot body 111, a normally open slot body 112 and a normally closed slot body 113. The main slot body 111 has normally open position P1 and normally closed position P2 arranged at intervals. The normally open slot body 112 is arranged corresponding to the normally open position P1 and is connected to the main slot body 111. The normally closed slot body 113 is arranged corresponding to the normally closed position P2 and is connected to the main slot body 111.

[0024] The opening and closing drive assembly 120 is used to drive the damper shaft 310. The opening and closing drive assembly 120 is provided with a sliding buckle 123, which is slidably disposed in the movable groove.

[0025] The locking component 130 is disposed on the opening and closing drive component 120. The locking component 130 is used to drive the sliding buckle 123 located in the normally open position P1 into the normally open slot 112, or to drive the sliding buckle 123 located in the normally closed position P2 into the normally closed slot 113.

[0026] In one embodiment, the main channel 111 is arc-shaped, and the center of the arc-shaped main channel 111 coincides with the axis of the damper shaft 310. The normally open position P1 can be the inlet / outlet of the normally open channel 112, and the normally closed position P2 can be the inlet / outlet of the normally closed channel 113. The normally open channel 112 and the normally closed channel 113 are branch channels of the main channel 111 and are offset from the arc-shaped main channel 111.

[0027] It should be noted that the normally open slot 112 and the normally closed slot 113 are not specially designed. Their shapes can be L-shaped, T-shaped, C-shaped, U-shaped, etc. The shape of the slot can indicate the movement trajectory of the sliding buckle 123 in the slot.

[0028] See Figure 1 and Figure 2 The opening and closing of the damper 300 is related to the rotation direction of the damper shaft 310: for example, rotating the damper shaft 310 counterclockwise opens the damper 300, while rotating it clockwise closes the damper 300. Based on this, in this embodiment, the main channel 111 is arranged in a left-right structure relative to the damper shaft 310, with the channel connected to the left side of the main channel 111 being the normally open channel 112, and the channel connected to the right side of the main channel 111 being the normally closed channel 113, to accommodate the opening and closing operation of the damper 300.

[0029] In one embodiment, the drive connection between the opening / closing drive assembly 120 and the damper shaft 310 can be a fixed connection or a gear transmission. When a fixed connection is used, the opening / closing drive assembly 120 includes a bushing and a connecting rod. The bushing is fixed to the damper shaft 310, and the rotation of the connecting rod drives the damper shaft 310 to rotate.

[0030] See also Figure 4 In some embodiments, the sliding buckle 123 can be a rotary structure, making its sliding within the movable groove smoother. For example, the longitudinal section of the sliding buckle 123 is in the shape of an "I", an "E", or a "1", etc., with a simple structure. The "I"-shaped and "E"-shaped sliding buckles 123 are equipped with a limit baffle structure, which can reduce the axial movement of the sliding buckle 123, prevent the sliding buckle 123 from falling out of the movable groove, and improve structural stability.

[0031] This application, by setting a locking component 130 and cooperating with a movable slot structure having a normally open slot 112 and a normally closed slot 113, allows the locking component 130 to drive the sliding buckle 123 into the corresponding normally open slot 112 or normally closed slot 113 when it reaches the normally open position P1 or normally closed position P2, forming a mechanical self-locking mechanism. This reduces or even avoids drying interruptions, temperature imbalances, or energy waste caused by unexpected oscillations of the damper 300 (such as accidental closing or opening of the damper 300), enabling the equipment to operate continuously and stably, thereby improving overall operational efficiency.

[0032] In one embodiment, a bushing is formed on the opening and closing drive assembly 120, and the bushing is fixedly connected to the damper shaft 310. The sliding buckle 123 moves circumferentially in the movable groove with the damper shaft 310 as the central axis.

[0033] In this embodiment, the opening and closing drive assembly 120 includes a swing arm module 120a, which includes a first swing rod 121 and a second swing rod 122. The first swing rod 121 is used to drive the damper shaft 310, and the second swing rod 122 is hinged to the first swing rod 121 and is provided with a sliding buckle 123.

[0034] The locking assembly 130 connects the first rocker arm 121 and the second rocker arm 122, and is used to drive the second rocker arm 122 to rotate relative to the first rocker arm 121 in the normally open position P1 or the normally closed position P2, so that the sliding buckle 123 can slide from the main groove 111 into the corresponding normally open groove 112 or normally closed groove 113.

[0035] See Figure 1 and Figure 2 In this embodiment, the first swing arm 121 can be a straight rod, and a bushing fitted on the damper shaft 310 is provided at the end of the first swing arm 121 that is away from the damper shaft 310. The end of the first swing arm 121 that is away from the damper shaft 310 is the driving end, and the driving end is hinged to the second swing arm 122 to simplify the structure of the swing arm module 120a.

[0036] When the sliding buckle 123 moves within the movable groove, the first swing rod 121 is always positioned within the radius of the main groove 111.

[0037] When the sliding buckle 123 is located inside the main groove 111, the first swing rod 121 and the second swing rod 122 extend along the radial direction of the main groove 111. When the sliding buckle 123 enters the normally open groove 112 or the normally closed groove 113, since the end of the second swing rod 122 is hinged to the first swing rod 121, under the driving action of the locking assembly 130, the second swing rod 122 rotates relative to the first swing rod 121, causing the extension direction of the second swing rod 122 to deviate from the extension direction of the first swing rod 121 and form an angle. At this time, the sliding buckle 123 will enter the corresponding normally open groove 112 or normally closed groove 113 to achieve mechanical self-locking. Thus, when the first swing rod 121 and the second swing rod 122 are in a straight line connection, the sliding buckle 123 can move inside the main groove 111 to switch the opening and closing state of the damper 300. When the first swing rod 121 and the second swing rod 122 are set at an angle, the opening and closing state of the damper 300 is locked.

[0038] See Figure 1 When the damper 300 is open or closed, the locking assembly 130 provides a pulling force to make the second swing arm 122 set at an angle relative to the first swing arm 121. Under the pulling force of the locking assembly 130, the sliding buckle 123 will continuously press against the side wall of the normally open tank 112 or the normally closed tank 113, generating a self-locking effect. This makes it difficult for the sliding buckle 123 to slide back to the main tank 111 along the normally open tank 112 and the normally closed tank 113. This reduces or even avoids the drying interruption, temperature imbalance or energy waste caused by the damper 300's unpredictable swing (such as the damper 300 being accidentally closed or opened), enabling the equipment to operate continuously and stably, thereby improving the overall operating efficiency.

[0039] In other embodiments, the second rocker arm 122 can be replaced by a movable pusher. When the first rocker arm 121 rotates to the normally open position P1 or the normally closed position P2, the locking assembly 130 drives the movable pusher into the normally open slot 112 or the normally closed slot 113, thereby restricting the first rocker arm 121 from continuing to swing and realizing the self-locking of the damper 300. When it is necessary to leave the normally open slot 112 or the normally closed slot 113, the locking assembly 130 causes the movable pusher to reset and leave the normally open slot 112 or the normally closed slot 113, allowing the first rocker arm 121 to continue to swing within the main slot 111, realizing the opening and closing of the damper 300.

[0040] In some embodiments, the locking component 130 is configured as an elastic component that provides elastic tension between the first rocker arm 121 and the second rocker arm 122.

[0041] See Figure 1Optionally, the locking assembly 130 may be a spring, a spring sheet, or an elastic cord. When a spring is used, one end of the spring is fixedly connected to the first swing arm, and the other end is fixedly connected to the second swing arm. To increase the locking force of the spring, in this embodiment, the spring is connected to the end of the second swing arm 122 away from the damper shaft 310, extending the spring's extension and retraction stroke. This allows the spring to generate a greater pulling force in the normally open position P1 or the normally closed position P2 to drive the second swing arm 122 to rotate relative to the first swing arm 121, thus improving responsiveness.

[0042] Thus, utilizing elastic tension, when the sliding buckle 123 reaches the normally open position P1 or normally closed position P2 along the main groove 111, the elastic component automatically pulls the second rocker arm 122 to rotate relative to the first rocker arm 121, causing the sliding buckle 123 to slide into the corresponding normally open groove 112 or normally closed groove 113. The entire process requires no additional sensors, controllers, or actuators; it is a purely mechanical passive triggering mechanism, less susceptible to electrical faults, electromagnetic interference, or program logic errors, thus improving operational reliability.

[0043] In this embodiment, the normally open slot 112 and the normally closed slot 113 are symmetrically distributed at opposite ends of the main slot 111. The outlines of the normally open slot 112 and the normally closed slot 113 at the slot openings are respectively connected to the outline of the main slot 111 by a circular arc transition, resulting in a smoother transition and smoother switching.

[0044] See Figure 1 and Figure 2 Since the normally open slot 112 and normally closed slot 113 are symmetrically distributed at opposite ends of the main slot 111, the sliding buckle 123 can enter or exit the normally open slot 112 or normally closed slot 113 with the same movement path and force method, whether the damper 300 is switched to the normally open position P1 or the normally closed position P2, simplifying the opening and closing operation of the damper 300. With the arc transition connection at the slot opening, the sliding buckle 123 will not experience impact or jamming when entering or exiting the slot, preventing dead points in the movement of the slot components. The movement of the sliding buckle 123 is smoother and more fluid, and also reduces driving resistance and impact noise.

[0045] It is worth mentioning that, in other embodiments, multiple normally open slots 112 can be arranged at intervals along the extension direction of the main slot 111, and the normally open slot 112 located at the end of the main slot 111 is the slot with the largest opening angle of the damper 300. In this way, normally open slots 112 with opening angles of 30°, 45°, and 60° can be sequentially arranged on the main slot 111 as needed, making the damper opening and closing mechanism 100 of this application more practical.

[0046] Of course, multiple normally closed slots 113 can also be arranged at intervals along the extension direction of the main slot 111, and the normally closed slots 113 located at the end of the main slot 111 can be used as slots for locking the damper 300. In this way, normally closed slots 113 with dampers 300 closed at 30°, 45° and 60° can be arranged sequentially on the main slot 111 as needed, making the damper opening and closing mechanism 100 of this application more practical.

[0047] In some embodiments, two sliding buckles 123 are provided; the two sliding buckles 123 are located on the same virtual circle, and the arc curvature of the virtual circle is consistent with the arc curvature of the main groove 111, so as to ensure that the two sliding buckles 123 can slide smoothly in the main groove 111.

[0048] See Figures 3 to 5 The second swing arm 122 includes a main rod 1222 and a secondary rod 1221. The secondary rod 1221 is Y-shaped, with two sliding buckles 123 positioned at opposite ends. By having the two sliding buckles 123 slide along an arc with the same curvature within the main groove 111, it provides dual-point support and guidance. Compared to a single sliding buckle 123, the double-buckle structure effectively suppresses the torsional sway of the second swing arm 122 around its own axis during movement, making the opening / closing process of the damper 300 smoother, especially when the damper 300 is subjected to uneven airflow. Simultaneously, the double-buckle structure creates redundancy and reduces the contact pressure of each sliding buckle 123, extending its service life.

[0049] In one embodiment, the main rod 1222 can be a straight rod, simplifying the structure of the second swing arm 122. When the sliding buckle 123 slides within the main groove 111, the main rod 1222 and the first swing arm 121 extend along the diameter direction of the main groove 111. When the sliding buckle 123 enters the normally open groove 112 or the normally closed groove 113, the axial extension of the main rod 1222 intersects with the axial extension of the first swing arm 121, forming an angle.

[0050] In some embodiments, there are two normally open slots 112, namely a first normally open slot 112a and a second normally open slot 112b. The first normally open slot 112a and the second normally open slot 112b are respectively disposed on opposite sides of the main slot 111, and the slot openings of the first normally open slot 112a and the second normally open slot 112b are connected to the main slot 111.

[0051] See Figure 2In the normally open state, the two sliding buckles 123 enter the first normally open slot 112a and the second normally open slot 112b, respectively. At this time, the elastic tension provided by the locking assembly 130 is decomposed into two clamping forces, which press the two sliding buckles 123 against the inner walls of their respective slots, improving the stability of the self-locking structure. In addition, the side walls of the two normally open slots 112 together define the lateral position of the sliding buckles 123, reducing the machining precision required for a single normally open slot 112 and facilitating manufacturing and assembly.

[0052] See Figure 2 The slot of the first normally open slot 112a faces to the left, and the slot of the second normally open slot 112b faces to the right. When manual unlocking is required, the direction of the operator moving the second lever 122 is locked, so that the two sliding buckles 123 can only symmetrically disengage from the left and right normally open slots 112 in the correct sliding direction, reducing the possibility of misoperation.

[0053] In some embodiments, there are two normally closed grooves 113, namely a first normally closed groove 113a and a second normally closed groove 113b. The first normally closed groove 113a and the second normally closed groove 113b are respectively disposed on opposite sides of the main groove 111, and the groove openings of the first normally closed groove 113a and the second normally closed groove 113b are connected to the main groove 111.

[0054] See Figure 2 In the normally closed state, the two sliding buckles 123 enter the first normally closed groove 113a and the second normally closed groove 113b, respectively. At this time, the elastic tension provided by the locking assembly 130 is decomposed into two clamping forces, which press the two sliding buckles 123 tightly against the inner walls of their respective grooves, improving the stability of the self-locking structure. In addition, the side walls of the two normally closed grooves 113 together define the lateral position of the sliding buckles 123, reducing the machining precision required for a single normally closed groove 113 and facilitating manufacturing and assembly.

[0055] See Figure 2 The slot opening of the first normally closed slot 113a faces to the left, and the slot opening of the second normally closed slot 113b faces to the right. When manual unlocking is required, the direction of the operator moving the second lever 122 is locked, so that the two sliding buckles 123 can only symmetrically disengage from the left and right normally closed slots 113 in the correct sliding direction, reducing the possibility of misoperation.

[0056] In some embodiments, the second rocker arm 122 is provided with a hinge portion 1224 that is rotatably connected to the first rocker arm 121, and the hinge portion 1224 is located between two sliding buckles 123.

[0057] See Figures 3 to 5The hinge portion 1224 is located between the two sliding buckles 123, so that when the elastic tension provided by the locking assembly 130 acts on the hinge point, the clamping force borne by the two sliding buckles 123 is basically equal. When the two sliding buckles 123 enter the first normally open slot 112a and the second normally open slot 112b, which are symmetrical, this symmetrical structure can automatically balance the contact reaction forces on both sides, avoiding one sliding buckle 123 from being pressed tightly while the other is loosely attached or stuck due to uneven load, thus improving the uniformity and reliability of locking.

[0058] In some embodiments, the end of the second rocker arm 122 away from the first rocker arm 121 is provided with a traction part 1223, and the opening and closing drive assembly 120 further includes a rope traction module, which is connected to the traction part 1223 via a traction rope 124.

[0059] See also Figure 1 , Figure 3 and Figure 6 By connecting the traction module and the traction rope 124 to the traction part 1223 at the end of the second swing arm 122, the traction module (such as a motor, electromagnet, or manual operating handle) can be positioned away from the damper 300. Compared to traditional rigid linkages or direct drives, this flexible transmission method reduces the installation space requirements, shrinks the size of the damper opening and closing mechanism 100, and improves operational safety and reliability. It is particularly suitable for applications with narrow air ducts, where traditional rigid linkages are more prone to accidental contact, causing personnel safety issues. Furthermore, frequent accidental contact can cause unintended swaying of the damper 300, severely affecting the drying temperature stability and operational efficiency.

[0060] See Figure 6 This application also provides a damper device A0, including a door frame 200, a damper 300, and a damper opening and closing mechanism 100 as described in any of the above embodiments. The damper 300 is rotatably mounted on the door frame 200 via a damper pivot 310, the damper opening and closing mechanism 100 is mounted on the door frame 200, and the opening and closing drive assembly 120 is drivenly connected to the damper pivot 310.

[0061] In this embodiment, the drive connection between the opening / closing drive assembly 120 and the damper shaft 310 is achieved using a D-shaped shaft and locking screws. In other embodiments, a flat key and keyway, spline connection, hexagonal or square shaft hole, tension sleeve connection, or pin through-hole fixation can also be used to prevent rotation.

[0062] The locking component 130, in conjunction with the movable slot structure featuring a normally open slot 112 and a normally closed slot 113, allows the locking component 130 to drive the sliding latch 123 into the corresponding slot when it reaches the normally open position P1 or the normally closed position, thus forming a mechanical self-locking mechanism. This reduces or even eliminates the risk of unexpected oscillations of the damper 300 (such as accidental closing or opening of the damper 300), which could lead to drying interruptions, temperature imbalances, or energy waste. This ensures continuous and stable operation of the equipment, thereby improving overall operational efficiency.

[0063] In some embodiments, the damper 300 includes at least one cold damper 300a and at least one hot damper 300b.

[0064] See also Figure 7 The cold air damper 300a and the hot air damper 300b are respectively provided with damper opening and closing mechanisms 100, so that the cold air damper 300a and the hot air damper 300b can achieve independent opening and closing control of the two dampers 300.

[0065] The opening and closing mechanism 100 of the cold air door 300a and the opening and closing mechanism 100 of the hot air door 300b are respectively equipped with pulleys 500. The pulleys 500 are used for directional transmission to pull the rope 124, so as to realize the sliding buckle 123 sliding in the movable groove.

[0066] In some embodiments, when multiple cold air dampers 300a are provided, the damper device A0 further includes a cold air damper linkage rod 400a, which is drivenly connected to the damper shaft 310 of each cold air damper 300a and is used to drive the multiple cold air dampers 300a to open and close synchronously; when multiple hot air dampers 300b are provided, the damper device A0 further includes a hot air damper linkage rod 400b, which is drivenly connected to the damper shaft 310 of each hot air damper 300b and is used to drive the multiple hot air dampers 300b to open and close synchronously.

[0067] In one implementation, see Figure 6 and Figure 8 The hot air damper linkage rod 400b and the cold air damper linkage rod 400a are arranged parallel to each other vertically.

[0068] In one embodiment, each damper shaft 310 is also equipped with a pull rod 400c. One end of the pull rod 400c is connected to the damper shaft 310, and the other end is hinged to the cold air damper linkage rod 400a or the hot air damper linkage rod 400b. In this way, when the damper shaft 310 of one of the cold air dampers 300a or the hot air damper 300b rotates, it can drive the cold air damper linkage rod 400a or the hot air damper linkage rod 400b to swing, thereby driving multiple cold air dampers 300a or multiple hot air dampers 300b to swing synchronously.

[0069] It is understandable that multiple cold air dampers 300a or hot air dampers 300b typically need to work together in drying equipment. For example, refer to [reference needed]. Figure 6 and Figure 8 In this embodiment, there are multiple hot air doors 300b, which are continuously distributed in the middle of the door frame 200, and there are two cold air doors 300a, which are respectively set on the left and right sides of the door frame 200.

[0070] The cold air damper linkage rod 400a is used to synchronously drive multiple cold air dampers 300a, and the hot air damper linkage rod 400b is used to synchronously drive multiple hot air dampers 300b. This ensures that the opening angle, closing time, and locking state of all dampers 300 of the same type are consistent, avoiding uneven airflow distribution caused by some dampers 300 closing prematurely or opening late, thereby improving the temperature uniformity of each area in the drying chamber and ensuring the consistency of material drying quality.

[0071] With the adoption of linkage rods, multiple cold air doors 300a or multiple hot air doors 300b only need to be equipped with one set of door opening and closing mechanism 100, which reduces equipment manufacturing costs, assembly time and the number of potential failure points, and improves the overall reliability of the machine.

[0072] This application also provides a grain dryer, including the damper opening and closing mechanism 100 or the damper device A0 in any of the above embodiments. Since the grain dryer adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects of the damper opening and closing mechanism 100 and the damper device A0, which will not be described in detail here.

[0073] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A damper opening and closing mechanism, characterized in that, include: The mounting base (110) is provided with a movable slot, which includes a main slot body (111), a normally open slot body (112), and a normally closed slot body (113). The main slot body (111) has normally open positions (P1) and normally closed positions (P2) arranged at intervals. The normally open slot body (112) is arranged corresponding to the normally open position (P1) and communicates with the main slot body (111). The normally closed slot body (113) is arranged corresponding to the normally closed position (P2) and communicates with the main slot body (111). An opening and closing drive assembly (120) is used to drive the damper shaft (310). The opening and closing drive assembly (120) is provided with a sliding buckle (123), which is slidably disposed in the movable groove. A locking component (130) is disposed on the opening and closing drive component (120). The locking component (130) is used to drive the sliding buckle (123) located in the normally open position (P1) into the normally open slot (112), or to drive the sliding buckle (123) located in the normally closed position (P2) into the normally closed slot (113).

2. The damper opening and closing mechanism according to claim 1, characterized in that, The opening and closing drive assembly (120) includes a swing arm module (120a), which includes a first swing rod (121) and a second swing rod (122). The first swing rod (121) is used to drive the damper shaft (310), and the second swing rod (122) is hinged to the first swing rod (121) and is provided with the sliding buckle (123). The locking assembly (130) connects the first rocker arm (121) and the second rocker arm (122), and is used to drive the second rocker arm (122) to rotate relative to the first rocker arm (121) in the normally open position (P1) or the normally closed position (P2), so that the sliding buckle (123) can slide from the main groove (111) into the corresponding normally open groove (112) or normally closed groove (113).

3. The damper opening and closing mechanism according to claim 2, characterized in that, The locking component (130) is configured as an elastic component that provides elastic tension between the first rocker arm (121) and the second rocker arm (122).

4. The damper opening and closing mechanism according to claim 2, characterized in that, The normally open slot (112) and the normally closed slot (113) are symmetrically distributed at opposite ends of the main slot (111). The outlines of the normally open slot (112) and the normally closed slot (113) at the slot openings are respectively connected to the outline of the main slot (111) by a circular arc transition.

5. The damper opening and closing mechanism according to claim 4, characterized in that, The sliding buckle (123) is configured as two; the two sliding buckles (123) are located on the same virtual circle, and the arc curvature of the virtual circle is consistent with the arc curvature of the main groove (111); The normally open slot (112) is provided in two parts, namely a first normally open slot (112a) and a second normally open slot (112b). The first normally open slot (112a) and the second normally open slot (112b) are respectively disposed on opposite sides of the main slot (111). The slot openings of the first normally open slot (112a) and the second normally open slot (112b) are connected to the main slot (111). and / or; Two normally closed grooves (113) are provided, namely a first normally closed groove (113a) and a second normally closed groove (113b). The first normally closed groove (113a) and the second normally closed groove (113b) are respectively disposed on opposite sides of the main groove (111). The groove openings of the first normally closed groove (113a) and the second normally closed groove (113b) are connected to the main groove (111).

6. The damper opening and closing mechanism according to claim 5, characterized in that, The second swing arm (122) is provided with a hinge part (1224) that is rotatably connected to the first swing arm (121), and the hinge part (1224) is located between the two sliding buckles (123).

7. The damper opening and closing mechanism according to any one of claims 2 to 6, characterized in that, The second swing arm (122) has a traction part (1223) at one end away from the first swing arm (121). The opening and closing drive assembly (120) also includes a pull rope traction module, which is connected to the traction part (1223) via a pull rope (124).

8. A damper device, characterized in that, The device includes a door frame (200), a damper (300), and a damper opening and closing mechanism (100) according to any one of claims 1 to 7. The damper (300) is rotatably mounted on the door frame (200) via a damper pivot (310), the damper opening and closing mechanism (100) is mounted on the door frame (200), and the opening and closing drive assembly (120) is drivenly connected to the damper pivot (310).

9. The damper device according to claim 8, characterized in that, The damper (300) includes at least one cold air damper (300a) and at least one hot air damper (300b), and the cold air damper (300a) and the hot air damper (300b) are respectively provided with the damper opening and closing mechanism (100); When multiple cold air doors (300a) are provided, the air door device (A0) further includes a cold air door linkage rod (400a), which is drivenly connected to the air door rotating shaft (310) of each cold air door (300a) and is used to drive multiple cold air doors (300a) to open and close synchronously. When multiple hot air doors (300b) are provided, the damper device (A0) further includes a hot air door linkage rod (400b), which is drivenly connected to the damper shaft (310) of each hot air door (300b) to drive multiple hot air doors (300b) to open and close synchronously.

10. A grain dryer, characterized in that, Includes the damper opening and closing mechanism (100) according to any one of claims 1 to 7 or the damper device (A0) according to claim 8 or 9.

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