Manual airtight gate of novel transmission structure

Abstract

The utility model discloses a manual airtight gate of a novel transmission structure, which comprises a frame, a gate plate, a cam pressing device and an opening and closing mechanism, one side of the frame is provided with a channel hole, and the channel hole is connected with a grain inlet and a grain outlet of a granary; a sealing strip seat is arranged on the inner wall of an opening in the upper end of the channel hole; a sealing strip is arranged at the lower end of the sealing strip seat; the other side of the frame is provided with a flashboard receding cavity. The opening and closing mechanism is arranged in the flashboard receding cavity; a gate plate is arranged in the frame, and after the gate plate is closed, the gate plate closes the channel hole; the flashboard is driven by an opening and closing mechanism; the cam pressing device is arranged on the frame, and after the flashboard is closed, the cam pressing device presses the flashboard. The air-tight gate is vertically arranged on the side wall to release the thermal insulation door, and the problems that in the prior art, a manual air-tight gate is tedious in operation and low in opening and closing efficiency, and the space occupied by the thermal insulation door is too large can be effectively solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of storage equipment such as grain warehouses, and in particular relates to a novel manual airtight gate with a transmission structure. Background Technology

[0002] Currently, grain storage enterprises generally use large grain silos to store grain. However, during the storage process, grain inevitably heats up, ages, and deteriorates, affecting its quality and causing economic losses to grain storage enterprises. Therefore, it is essential to fumigate and ventilate grain silos in a timely manner during grain storage. Fumigation involves sealing the grain silo and introducing a fumigant inside. The fumigant circulates within the silo, killing bacteria, insects, insect eggs, and microorganisms in the grain. Leakage of the fumigant in the early stages of fumigation can cause personal injury and pollution. Therefore, it is crucial to keep the grain silo tightly sealed during fumigation. Ventilation transfers the heat and moisture from the grain to the outside air, effectively reducing the damage caused by grain heating and moisture evaporation, minimizing aging and deterioration, and reducing economic losses for grain storage enterprises.

[0003] Large grain silos are equipped with inlets and outlets. The inlet is located at the top of the silo, while the outlet is located at the bottom and side wall. Both inlets and outlets are fitted with airtight gates to control the flow of grain and the airtightness during fumigation. When grain is being fed in, the outlet airtight gate is closed, while the inlet airtight gate is opened. When grain is being discharged, the outlet airtight gate on the bottom or side wall of the silo is opened as needed. During fumigation, both inlet and outlet airtight gates are closed, and fumigation gas is introduced through the fumigation port located at the bottom of the silo and maintained for a certain period to achieve the fumigation purpose.

[0004] However, in southern my country, the air humidity is high and the temperature difference between the inside and outside of the grain warehouse is also large. At the grain warehouse inlet and outlet, the airtight gates are made of steel plates about 6-8 mm thick. The temperature exchange at the grain warehouse inlet and outlet causes condensation, especially at the outlet on the side wall. Light impurities and dust in the grain are very easy to condense at the grain warehouse inlet and outlet, forming clumps, which affect the flow of grain and even block the outlet, causing a significant obstacle to the grain leaving the warehouse. Cleaning the clumps is labor-intensive, pollutes the environment, and is unsafe. It also makes it difficult to open and close the gate, and the above phenomena will recur.

[0005] Existing manual airtight gates use a screw drive mechanism for opening and closing, which has the following structural defects: First, the mechanical characteristics of the screw drive limit the gate's opening and closing speed, resulting in excessively long opening and closing times and significantly reducing operational efficiency. Second, the operating handwheel assembly is located at the top of the insulated door at the rear of the equipment, which is far from the operating platform. In addition, this layout increases the length of the gate body, forcing a corresponding increase in the size of the matching insulated door, which not only increases manufacturing costs but also disrupts the continuity of the insulation layer, creating a thermal bridge effect at the screw penetration point and reducing insulation performance. Summary of the Invention

[0006] To address the aforementioned issues, this utility model provides a novel manual airtight gate with a transmission structure. It is vertically installed on the side wall to release the insulation door, effectively solving the problems of cumbersome operation, low opening and closing efficiency, and excessive space occupation of the insulation door in the prior art.

[0007] The technical solution adopted in this utility model is as follows: a novel manual airtight gate with a transmission structure, comprising a frame, a gate plate, a cam pressing device, and an opening and closing mechanism. One side of the frame is a channel hole connected to the grain inlet and outlet of the grain silo. A sealing strip seat is provided on the inner wall of the upper opening of the channel hole, and a sealing strip is provided at the lower end of the sealing strip seat. The other side of the frame is a gate plate retraction cavity. The opening and closing mechanism is located in the gate plate retraction cavity. A gate plate is provided inside the frame. After the gate plate is closed, it closes the channel hole. The gate plate is driven by the opening and closing mechanism. The cam pressing device is located on the frame. After the gate plate is closed, the cam pressing device presses the gate plate.

[0008] Furthermore, the opening and closing mechanism includes a rack, a gear, a rotating shaft, and a handwheel. The rack is horizontally arranged in the middle of the gate plate, the gear is arranged on the rotating shaft and meshes with the tooth structure of the rack, and the handwheel is arranged in the middle of the frame and connected to one end of the rotating shaft.

[0009] Furthermore, the frame inside the gate retraction cavity is provided with limiting bolts to limit the travel range of the gate.

[0010] Furthermore, a scale is provided on the frame next to the limiting bolt for accurate indication of the gate opening degree.

[0011] Furthermore, a locking device is provided on the frame next to the handwheel to fix its position after the gate is closed.

[0012] Furthermore, the locking device includes a locking gear mounted on a rotating shaft and a wedge for insertion between the teeth of the locking gear, the wedge being capable of lateral movement.

[0013] Furthermore, the gate retraction cavity is provided with a support roller, which is arranged on the side wall of the frame to support the gate and reduce movement friction.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model adopts a gear and rack structure, which has higher load-bearing capacity and transmission efficiency than the traditional screw structure, and is suitable for a larger stroke;

[0016] 2. The gate in this utility model can be locked in any position, meeting the adaptability of the grain warehouse under different opening and closing conditions;

[0017] 3. This utility model uses bolts to limit the position, so that the rack will not come off the teeth. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the opening and closing mechanism in this utility model;

[0020] Figure 3 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the locking device in this utility model;

[0022] In the diagram: 1-frame, 2-gate, 3-rack, 4-gear, 5-limit bolt, 6-cam clamping device, 7-locking device, 8-support roller, 9-sealing strip seat, 10-rotating shaft, 11-handwheel, 12-locking gear, 13-channel hole, 14-gate retraction cavity, 15-scale ruler, 16-sealing strip, 17-wedge. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figures 1 to 3As shown, this utility model is a novel manual airtight gate with a transmission structure. It is vertically installed inside the side wall's insulated dispensing door, used to ensure airtightness within the warehouse during fumigation and to dispense grain. This utility model includes a frame 1, a gate 2, a cam pressing device 6, and an opening and closing mechanism. One side of the frame 1 has a channel hole 13, which connects to the grain inlet and outlet of the grain warehouse. A sealing strip seat 9 is provided on the inner wall of the upper opening of the channel hole 13, and a sealing strip 16, which is a hollow sealing strip, is provided at the lower end of the sealing strip seat 9. The other side of the frame 1 has a gate retraction cavity 14; the opening and closing mechanism is located within the gate retraction cavity 14; the gate 2 is installed inside the frame 1. When the gate 2 is closed, it closes the channel hole 13. The gate 2 is driven by the opening and closing mechanism; a limiting bolt 5 is provided on the frame inside the gate retraction cavity 14 to limit the travel range of the gate 2. A scale 15 is provided on the frame 1 next to the limiting bolt 5 to accurately indicate the opening degree of the gate 2. A support roller 8 is provided inside the gate retraction cavity 14. The support roller 8 is arranged on the side wall of the frame 1 to support the gate 2 and reduce movement friction. The cam pressing device 6 is provided on the frame 1. After the gate 2 is closed, the cam pressing device 6 presses the gate 2, so that the gate 2 contacts the sealing strip seat 9, and the gap between the gate 2 and the sealing strip seat 9 is sealed by the sealing strip 16.

[0025] The opening and closing mechanism includes a rack 3, a gear 4, a rotating shaft 10, and a handwheel 11. The rack 3 is horizontally positioned in the middle of the gate 2, and the gear 4 is mounted on the rotating shaft 10 and meshes with the toothed structure of the rack 3, facilitating quick opening and closing of the gate and saving operation time. The handwheel 11 is located on the side of the gate in the middle of the frame 1 and is connected to one end of the rotating shaft 10. This arrangement reduces the total length of the gate, effectively reducing the size of the insulated door to improve insulation performance. Simultaneously, the handwheel is closer to the operating platform, facilitating operation by staff. A locking device 7 is installed on the frame 1 next to the handwheel 11 to fix its position after the gate 2 is closed.

[0026] like Figure 4 As shown, the locking device 7 in this utility model includes a locking gear 12 disposed on the rotating shaft 10 and a wedge 17 for inserting between the teeth of the locking gear 12. The wedge 17 can move laterally and lock the locking gear 12 at any time.

[0027] The above description is a further detailed explanation of the present utility model in conjunction with specific preferred embodiments. It should not be considered that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the protection scope of the present utility model.

Claims

1. A new type of drive structure for a manual air-tight gate, characterized in that, The system includes a frame (1), a gate (2), a cam pressing device (6), and an opening and closing mechanism. One side of the frame (1) is a channel hole (13), which is connected to the grain inlet and outlet of the grain bin. A sealing strip seat (9) is provided on the inner wall of the upper opening of the channel hole (13), and a sealing strip (16) is provided at the lower end of the sealing strip seat (9). The other side of the frame (1) is a gate retraction cavity (14). The opening and closing mechanism is located in the gate retraction cavity (14). A gate (2) is provided in the frame (1). After the gate (2) is closed, the gate (2) closes the channel hole (13). The gate (2) is driven by the opening and closing mechanism. The cam pressing device (6) is located on the frame (1). After the gate (2) is closed, the cam pressing device (6) presses the gate (2).

2. The manual air-tight gate according to claim 1, wherein, The opening and closing mechanism includes a rack (3), a gear (4), a rotating shaft (10), and a handwheel (11). The rack (3) is arranged laterally in the middle of the gate (2). The gear (4) is arranged on the rotating shaft (10) and meshes with the tooth structure of the rack (3). The handwheel (11) is arranged in the middle of the frame (1) and connected to one end of the rotating shaft (10).

3. The manual airlock according to claim 1, wherein, The frame inside the gate retraction cavity (14) is provided with a limiting bolt (5) to limit the travel range of the gate (2).

4. The manual airlock according to claim 3, wherein, The frame (1) next to the limiting bolt (5) is provided with a scale (15) for accurately indicating the opening degree of the gate (2).

5. The manual airlock according to claim 2, wherein, A locking device (7) is provided on the frame (1) next to the handwheel (11) to fix its position after the gate (2) is closed.

6. The manual airlock according to claim 5, wherein, The locking device (7) includes a locking gear (12) disposed on a rotating shaft (10) and a wedge (17) for insertion between the teeth of the locking gear (12), the wedge (17) being capable of lateral movement.

7. The manual airlock according to claim 1, wherein, The gate retraction cavity (14) is provided with a support roller (8), which is arranged on the side wall of the frame (1) to support the gate (2) and reduce movement friction.

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