Self-energizing air-tight gate

Abstract

The utility model relates to an automatic compression airtight gate, including frame body, gate and drive mechanism, frame body has the grain pass -through mouth of upper and lower through -and -through, and the front and back side wall of grain pass -through mouth and gate movable cavity all are equipped with a plurality of support guide wheel, the front and back side wall of grain pass -through mouth is equipped with eccentric gear, and the downside of gate is equipped with rack, and the upper portion of grain pass -through mouth is equipped with a circle's sealing strip seat, and the downside of sealing strip seat is equipped with sealing strip, drive mechanism, including cylinder, transmission part, and cylinder is used for driving gate action. The gate in the moving process of closing grain mouth, moves to the set stroke section and can use the ingenious cooperation of eccentric gear and rack, realizes automatic upwardly to top gate and compresses sealing strip, has saved the step of operating eccentric wheel by artificial operation after gate closure, and the gate is driven by cylinder, has solved the problem of time -consuming and labor -intensive in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of granary gate technology, specifically to an automatic pressing airtight gate. Background Technology

[0002] The grain silo is equipped with an inlet and an outlet. The inlet is located at the top of the silo, while the outlet is located at the bottom and side wall. Both inlet and outlet are fitted with airtight gates to control the airtightness during grain loading, unloading, and fumigation. When loading grain, the outlet airtight gate is closed, and the inlet airtight gate is opened. Traditional airtight gates primarily achieve a seal by rotating an eccentric wheel to press a sealing strip against the seal. Figure 1-2 As shown, after the gate 11 is pushed to the right by the hand-cranked screw and nut mechanism 12 (partially shown), the shaft of the eccentric wheel 14 needs to be rotated using a wrench 16. During the rotation of the eccentric wheel 14, the gate 11 can be pushed upwards, and the gate 11 and the sealing strip 15 above it are tightly fitted to achieve a certain sealing effect. During the movement of the gate 11, the guide wheel 13 provides horizontal support. Eccentric wheels 14 are provided on both the front and rear sides of the airtight gate. The shaft 17 of the eccentric wheel 14 needs to be tightened by the wrench 16. For the airtight gate at the grain outlet, there may still be some grain on the gate, so pushing the gate upwards by tightening the eccentric wheel is time-consuming and laborious. Utility Model Content

[0003] The purpose of this invention is to provide an automatic pressing airtight gate, which solves the technical problem mentioned above that requires manual operation to seal the gate.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An automatic pressing airtight gate includes a frame, a gate plate, and a drive mechanism. The frame has a grain passage that runs vertically through the grain passage. The right side of the grain passage is the movable cavity of the gate plate, which is horizontally positioned. Several support guide wheels are provided on the front and rear side walls of both the grain passage and the movable cavity of the gate plate. The support guide wheels on each side are spaced apart in the left-right direction and are used to support the gate plate. At least one eccentric gear is provided on the front and rear side walls of the grain passage. The eccentric gear is staggered from the support guide wheel on the same side in the front-back direction. A rack is provided on the lower side of the gate plate. During the process from the beginning of meshing between the rack and the eccentric gear to the closing of the gate plate, the eccentric gear gradually pushes the gate plate upward. A sealing strip seat is provided at the top of the grain passage, and a sealing strip is provided on the lower side of the sealing strip seat, which is used to seal with the gate when the gate is closed; The drive mechanism includes a cylinder and a transmission component. The transmission component is connected to the gate, and the cylinder is used to drive the gate to move.

[0005] Furthermore, the sealing strip is a hollow structure and is arranged around the sealing strip seat.

[0006] Furthermore, the sealing strip is adhesively bonded to the sealing strip seat.

[0007] Furthermore, there are two racks, located on the front and rear edges of the gate, respectively, and the two racks are arranged in parallel.

[0008] Furthermore, the cylinder is located on the right side of the frame, and a support plate is provided on the right side of the frame. The cylinder is located on the support plate, and the transmission component is located in the movable cavity of the gate. A guide rod is provided in the movable cavity of the gate, and a sliding sleeve is provided on the guide rod. One end of the transmission component is hinged to the sliding sleeve, and the other end is hinged to the hinge seat on the bottom side of the gate. The sliding sleeve is connected to the end of the piston rod of the cylinder.

[0009] Furthermore, the transmission component is a crank arm.

[0010] Furthermore, a limiting roller is provided in the movable cavity of the gate, located above the gate.

[0011] Furthermore, the top and bottom of the gate's movable cavity are respectively connected by screws to a cover plate and a bottom plate, which are used to close the upper and lower opening areas of the gate's movable cavity.

[0012] Furthermore, a partition is provided between the grain passage and the gate's movable cavity, and the partition is provided with a passage hole, allowing the gate to pass through in the left and right directions.

[0013] Furthermore, the bottom of the through hole is an arc-shaped portion, and the bottom side of the gate is provided with a pushing portion. The bottom side of the pushing portion is a slope that is lower on the left and higher on the right. When the gate is closed, the slope and the arc-shaped portion fit tightly together.

[0014] The beneficial effects of this utility model are: This invention features an eccentric gear on each of the front and rear side walls of the grain inlet, and a rack on the lower side of the gate. The rack engages with the eccentric gear during a set travel segment, specifically when the gate moves rapidly to the left closed position, initially contacting the gear. During the process from the initial engagement of the rack and eccentric gear until the gate closes, the rotating eccentric gear gradually pushes the gate upwards. Once the gate is in position (closed), it presses upwards against the sealing strip to achieve a seal. The eccentric gear and the supporting guide wheel on the same side are offset in the front-rear direction, ensuring they do not interfere with the gate's engagement with the guide wheel and preventing collisions between the guide wheel and the rack. During the gate's movement to close the grain inlet, when it reaches the set travel segment, the clever interaction between the eccentric gear and rack automatically pushes the gate upwards to press the sealing strip, eliminating the need for manual operation of the eccentric wheel after the gate closes. Furthermore, the gate is driven by a cylinder, thus solving the time-consuming and labor-intensive problems of existing technologies. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of an airtight gate in the prior art; Figure 2 This is a partial view of the outer side of an airtight gate in the prior art; Figure 3 This is a three-dimensional structural diagram of the automatic pressing airtight gate of this utility model; Figure 4 This is a cross-sectional structural diagram of the automatic pressing airtight gate of this utility model; Figure 5 yes Figure 4 A partial view of the eccentric gear; Figure 6 This is a partial sectional view of the automatic pressing airtight gate of this utility model.

[0016] 11. Gate plate; 12. Screw and nut mechanism; 13. Guide wheel; 14. Eccentric wheel; 15. Sealing strip; 16. Wrench; 2. Frame; 21. Grain passage; 22. Cover plate; 23. Gate moving chamber; 24. Partition plate; 25. Support plate; 26. Base plate; 3. Gate; 31. Rack; 32. Pushing part; 4. Support guide wheel; 5. Eccentric gear; 6. Cylinder; 71. Guide rod; 72. Sliding sleeve; 73. Transmission component; 81. Sealing strip seat; 82. Sealing strip. Detailed Implementation 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0017] Embodiments of this utility model: like Figures 3 to 6 As shown, the automatic pressing airtight gate includes a frame 2, a gate plate 3, and a drive mechanism. The frame 2 has a grain passage 21 that runs vertically through the grain passage 21, and the right side of the grain passage 21 is the gate plate's movable cavity 23. A partition 24 is provided between the grain passage 21 and the gate plate's movable cavity 23. The frame 2 includes two U-shaped plates symmetrically arranged front and rear, and two U-shaped plates on the left and right sides, providing good overall support strength. The upper edge of the grain passage 21 has a flange hole, which can be connected to the inlet or outlet of the grain silo.

[0018] The gate 3 is horizontally positioned; a rectangular through hole is provided at the upper part of the partition 24, allowing the gate 3 to pass through in the left and right directions. The drive mechanism is used to move the gate 3 in the left and right directions; moving it to the left closes the gate, and moving it to the right opens the gate. The partition 24 is also a U-shaped plate.

[0019] Several supporting guide wheels 4 are provided on the front and rear side walls of the grain passage 21 and the gate movable cavity 23. The supporting guide wheels 4 on each side are spaced apart in the left and right direction and arranged in a row. The supporting guide wheels 4 are used to support the gate 3. The supporting guide wheel 4 includes a shaft and a rotating wheel. The rotating wheel can rotate freely and not only supports the gate 3, but also reduces the resistance during the movement of the gate 3. The rotating wheel can be a small bearing, or a roller can be directly mounted on the shaft.

[0020] A sealing strip seat 81 is provided around the upper part of the grain passage 21, and a sealing strip 82 is provided on the lower side of the sealing strip seat 81. The sealing strip 82 is a hollow sealing strip that surrounds the sealing strip seat 81. The sealing strip 82 is glued to the sealing strip seat 81. The sealing strip seat 81 is fixed to the upper edge of the grain passage 21, and the sealing strip seat 81 can be welded for fixation. The sealing strip can also be installed by snap-fit, with a hollow deformable part at the bottom and a snap-fit ​​part at the top, which can be snapped into the slot of the sealing strip seat 81. The snap-fit ​​method facilitates later replacement. The gate is not a piece of equipment used very frequently, so the sealing strip fixed by adhesive method can also meet the requirements and the installation is simpler; the sealing strip using adhesive method can be a style with only a hollow deformable part, without the need for a snap-fit ​​structure.

[0021] When the gate 3 moves to the left into the grain passage 21, the gate 3 is supported by the guide wheel 4. At this time, there is a gap between the gate 3 and the sealing strip 82. The gap is appropriate (between 2mm and 5mm) so that the gate 3 can move more smoothly. The sealing strip 82 is in a free state, providing compression space for subsequent sealing.

[0022] An eccentric gear 5 is provided on the front and rear side walls of the grain passage 21, and a rack 31 is provided on the lower side of the gate 3. Two racks 31 are provided, located on the front and rear edges of the gate 3 respectively, and are arranged parallel to each other. The racks 31 are not fully extended along the length of the gate 3; their length is sufficient. The racks 31 are located in the left-hand area of ​​the center of the gate 3, and they activate when the gate 3 is about to move to the left closed position, at which point they begin to contact the gears. The eccentric gears 5 and the supporting guide wheel 4 on the same side are offset in the front-rear direction to prevent the racks 31 from hitting the supporting guide wheel 4 during the initial leftward movement of the gate 3.

[0023] During the process from the initial engagement of rack 31 and eccentric gear 5 to the closing of gate 3, eccentric gear 5 gradually pushes gate 3 upwards. In its free state, under the influence of gravity, the side of eccentric gear 5 furthest from the shaft will be at the bottom. After rack 31 engages with eccentric gear 5, rack 31 continues to move to the left along with the gate. Due to its eccentric nature, eccentric gear 5 gradually pushes gate 3 upwards. After gate 3 reaches its position (when closed), gate 3 presses upwards against sealing strip 82 to achieve a seal. When opening, gate moves to the right and backwards, causing eccentric gear 5 to reverse and gradually disengage from rack 31. Then, gate moves horizontally and exits grain passage 21.

[0024] The drive mechanism includes a cylinder 6 and a transmission component 73. The transmission component 73 is connected to the gate 3, and the cylinder 6 is used to drive the gate 3 to move.

[0025] like Figure 2 As shown, cylinder 6 is located on the right side of frame 2, and a support plate 25 is provided on the right side of frame 2. Cylinder 6 is located on support plate 25. Transmission component 73 is located in gate movable cavity 23, and a guide rod 71 is provided in gate movable cavity 23. A sliding sleeve 72 is provided on guide rod 71, and the sliding sleeve 72 can slide on guide rod 71 after being subjected to force. Guide rod 71 is arranged parallel to piston rod of cylinder 6.

[0026] like Figure 2 As shown, one end of the transmission component 73 is hinged to the sliding sleeve 72, and the other end is hinged to the hinge seat on the bottom side of the gate plate 3; the sliding sleeve 72 is connected to the end of the piston rod of the cylinder 6. The transmission component 73 is a crank arm. When the cylinder 6 is activated, it drives the sliding sleeve 72 to move, which in turn drives the gate plate 3 to move through the transmission of the crank arm. The cylinder 6 can drive the gate plate 3 to move in the left and right directions. At the same time, since the two ends of the crank arm are hinged, the gate plate 3 can also move appropriately in the up and down directions, for example, the eccentric gear 5 pushes the gate plate upward as described above.

[0027] A pair of limiting rollers (not shown) are provided in the gate's movable cavity 23, located above the gate 3 and on the front and rear side walls of the gate's movable cavity 23. Normally, the limiting rollers are higher than the gate; even after the gate is closed, the limiting rollers remain higher than the gate, and this position can be set a few millimeters higher. The limiting rollers allow the gate 3 to move within a certain space in the vertical direction. In this embodiment, the limiting rollers have the same structure as the supporting guide rollers 4.

[0028] The top and bottom of the gate's movable cavity 23 are respectively connected by screws to a cover plate 22 and a base plate 26, which are used to close the upper and lower opening areas of the gate's movable cavity 23 and provide protection on the left and right sides. The cover plate 22 and the base plate 26 are removable for easy internal maintenance.

[0029] Furthermore, the bottom of the aforementioned through hole is an arc-shaped portion, such as... Figure 6As shown, the bottom side of the gate 3 is provided with a pushing part 32. The bottom side of the pushing part 32 is an inclined surface that is lower on the left and higher on the right. When the gate 3 is closed, the inclined surface and the arc part fit tightly together. This design supplements the pushing effect of the eccentric gear 5 on the gate 3. Since the eccentric gear 5 is on the left side, the pushing part 32 fits with the bottom of the through hole at the partition 24 position, so that the gate 3 is subjected to an upward pushing force at this position. The tight fit between the gate 3 and the sealing strip 82 is better, and the sealing effect is better. After the gate 3 moves to a certain position to the left, the bottom pushing part 32 protrudes, and its bottom inclined surface begins to contact the bottom of the through hole. As the gate 3 moves, it can gradually push the gate 3 upward, achieving a synergistic effect with the pushing effect of the eccentric gear 5 on the gate 3.

[0030] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used 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," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic pressing airtight gate, characterized in that: The device includes a frame, a gate, and a drive mechanism. The frame has a grain passage that runs vertically through the grain passage. The right side of the grain passage is the movable cavity of the gate, which is horizontally positioned. Several support guide wheels are provided on the front and rear side walls of both the grain passage and the movable cavity of the gate. The support guide wheels on each side are spaced apart in the left-right direction and are used to support the gate. At least one eccentric gear is provided on the front and rear side walls of the grain passage. The eccentric gear is staggered from the support guide wheel on the same side in the front-back direction. A rack is provided on the lower side of the gate. During the process from the beginning of meshing between the rack and the eccentric gear to the closing of the gate, the eccentric gear gradually pushes the gate upward. A sealing strip seat is provided at the top of the grain passage, and a sealing strip is provided on the lower side of the sealing strip seat, which is used to seal with the gate when the gate is closed; The drive mechanism includes a cylinder and a transmission component. The transmission component is connected to the gate, and the cylinder is used to drive the gate to move.

2. The automatic pressing airtight gate according to claim 1, characterized in that: The sealing strip is a hollow structure and is arranged around the sealing strip seat.

3. The automatic pressing airtight gate according to claim 2, characterized in that: The sealing strip is glued to the sealing strip seat.

4. The automatic pressing airtight gate according to claim 1, characterized in that: The gate is provided with two racks, which are located on the front and rear edges of the gate respectively, and the two racks are arranged in parallel.

5. The automatic pressing airtight gate according to claim 1, characterized in that: The cylinder is located on the right side of the frame, and a support plate is provided on the right side of the frame. The cylinder is located on the support plate, and the transmission component is located in the movable cavity of the gate. A guide rod is provided in the movable cavity of the gate, and a sliding sleeve is provided on the guide rod. One end of the transmission component is hinged to the sliding sleeve, and the other end is hinged to the hinge seat on the bottom side of the gate. The sliding sleeve is connected to the end of the piston rod of the cylinder.

6. The automatic pressing airtight gate according to claim 5, characterized in that: The transmission component is a crank arm.

7. The automatic pressing airtight gate according to claim 5, characterized in that: The gate's movable cavity is equipped with a limiting roller located above the gate.

8. The automatic pressing airtight gate according to claim 1, characterized in that: The top and bottom of the gate's movable cavity are respectively connected by screws to a cover plate and a bottom plate, which are used to close the upper and lower opening areas of the gate's movable cavity.

9. The automatic pressing airtight gate according to claim 1, characterized in that: A partition is provided between the grain inlet and the gate's movable cavity, and the partition has a through hole that allows the gate to pass through in the left and right directions.

10. The automatic pressing airtight gate according to claim 9, characterized in that: The bottom of the through hole is an arc-shaped part, and the bottom side of the gate is provided with a push part. The bottom side of the push part is a slope that is lower on the left and higher on the right. When the gate is closed, the slope and the arc-shaped part fit tightly together.

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