Pneumatic damper door with buffer function
Patent Information
- Application Number
- CN202522503625.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-26
AI Technical Summary
[0003]现有的气动闸板门虽然结构简单、动作迅速，但由于气缸驱动具有动作快、惯性大的特点，闸板在行程末端，特别是关闭到位时，会产生剧烈的机械冲击和振动，这种冲击不仅会产生巨大的噪音，更重要的是，它会严重损害门板、门框以及气缸本身的结构，导致连接件松动、密封失效，甚至造成设备损坏；部分现有技术尝试通过设置外部液压缓冲器或在气缸回路中增加节流阀来缓解冲击，增加了结构的复杂性和占用空间，且在高粉尘工况下易失效；且传统的刚性闸板在关闭时，若与门框密封面或滞留的硬质物料发生硬性碰撞，缺乏必要的容错和吸能能力，容易导致闸口或闸板边缘变形损坏，为此，我们提出一种带缓冲功能的气动闸板门
[0015]1、本实用新型通过安装杆压缩伸缩充气筒，在关门末段将闸板运动的动能转化为气体的压力势能，利用气体的可压缩性，提供了非刚性的、平滑递增的阻尼力，从而实现了高效的柔性缓冲，解决了传统气动闸板门硬性碰撞导致的冲击振动大、噪音高的问题，有效保护了门板、门框及气缸等核心部件，延长了设备整体使用寿命。
Smart Images
Figure CN224836289U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pneumatic gate technology, specifically a pneumatic gate with a buffer function. Background Technology
[0002] Pneumatic gate valves, as a common type of industrial valve, are widely used in material conveying systems in industries such as metallurgy, mining, building materials, and grain processing, primarily for cutting off or connecting logistics. Their core working principle involves a cylinder driving a gate to perform linear motion, thereby opening and closing the valve.
[0003] While existing pneumatic gates are simple in structure and operate quickly, the high inertia and rapid movement of the cylinder drive cause severe mechanical impact and vibration at the end of the gate's stroke, especially when it is fully closed. This impact not only generates significant noise but, more importantly, severely damages the gate panel, frame, and cylinder itself, leading to loose connections, seal failure, and even equipment damage. Some existing technologies attempt to mitigate the impact by adding external hydraulic buffers or throttle valves to the cylinder circuit, but this increases structural complexity and space requirements, and is prone to failure under high-dust conditions. Furthermore, traditional rigid gates lack the necessary fault tolerance and energy absorption capacity when they collide with the gate frame sealing surface or trapped hard materials during closure, easily causing deformation and damage to the gate opening or gate edge. Therefore, we propose a pneumatic gate with a buffer function. Utility Model Content
[0004] The purpose of this invention is to provide a pneumatic gate with a buffer function to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic gate with a buffer function, including a door frame, an installation groove on the outer side wall of the door frame, a cylinder installed in the installation groove on each of the two side walls of the door frame, and a telescopic hose fixedly connected to the piston rod end of the cylinder, a door panel slidably disposed inside the door frame, and horizontal sliding grooves symmetrically disposed inside the door frame, with mounting rods slidably connected in the two sliding grooves, and one end of the door panel fixedly connected to the mounting rod;
[0006] Both ends of the mounting rod extend into the mounting groove. The end of the telescopic hose is fixedly connected to the mounting rod. A telescopic air cylinder is symmetrically installed at the end of the door frame away from the door panel, and the air outlet of the telescopic air cylinder is connected to the inside of the mounting groove. A Z-shaped mounting plate for protecting the door panel is provided at the end of the door panel away from the mounting rod.
[0007] Preferably, a gusseted cloth is installed in the groove, and the end of the gusseted cloth is fixedly connected to the mounting rod.
[0008] Preferably, vent pipes are symmetrically installed on one end of the sliding groove on the surface of the door frame, a connecting pipe is fixedly connected to the air outlet end of the telescopic air cylinder, and the end of the connecting pipe is connected to the vent pipe. Air outlets are provided at equal intervals on the outer side of the vent pipe, and the end of the air outlet extends into the mounting groove.
[0009] Preferably, a one-way air inlet valve is installed on the outer side of the air inlet end of the telescopic air cylinder.
[0010] Preferably, a positioning plate is symmetrically fixed to the middle of the door panel, and the door panel is slidably connected between the two positioning plates. A limit plate is symmetrically fixed to the top of the mounting rod.
[0011] Preferably, the inner wall of the door frame is symmetrically fixed with limit rods at the top and bottom of the telescopic air cylinder, and the telescopic air cylinder is telescopically arranged between the four limit rods.
[0012] Preferably, the door panel has strip-shaped connecting grooves equidistantly opened at one end away from the mounting rod, and sliding blocks are fixedly connected to the surface of the Z-shaped mounting plate at equal intervals. The sliding blocks are slidably connected in the strip-shaped connecting groove, and a sliding rod is fixedly connected in the strip-shaped connecting groove. The sliding blocks are slidably connected to the outside of the sliding rod, and a buffer spring is sleeved on the outside of the sliding rod between the inner wall of the strip-shaped connecting groove and the sliding block.
[0013] Preferably, both the telescopic hose and the telescopic air cylinder are equipped with support springs.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. This utility model uses an installation rod to compress a telescopic air cylinder, converting the kinetic energy of the gate's movement into the pressure potential energy of the gas at the end of the closing phase. Utilizing the compressibility of the gas, it provides a non-rigid, smoothly increasing damping force, thereby achieving efficient flexible buffering. This solves the problems of large impact vibration and high noise caused by hard collisions in traditional pneumatic gates, effectively protecting core components such as the gate panel, gate frame, and cylinder, and extending the overall service life of the equipment.
[0016] 2. The unique telescopic air cylinder and the connection design of the mounting groove and air pipe of this utility model enable the high-pressure air generated during the buffering process to be transported into the mounting groove. This high-pressure airflow can effectively blow away the sliding groove and the accordion cloth area, automatically remove the accumulated dust, and ensure the smooth operation of moving parts and the life of the seals. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is an enlarged structural schematic diagram of point A of this utility model;
[0019] Figure 3 This is a cross-sectional view of the present invention.
[0020] Figure 4 This is an enlarged structural diagram of section B of the present invention.
[0021] In the diagram: 1. Door frame; 2. Door panel; 3. Mounting groove; 4. Cylinder; 5. Mounting rod; 6. Limiting plate; 7. Positioning plate; 8. Telescopic air cylinder; 9. Limiting rod; 10. Connecting pipe; 11. Vent pipe; 12. Air outlet; 13. Slide groove; 14. Accordion cloth; 15. Telescopic flexible hose; 16. Z-shaped mounting plate; 17. Strip connecting groove; 18. Sliding block; 19. Slide rod; 20. Buffer spring. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a pneumatic gate with buffer function, including a door frame 1, an installation groove 3 is provided on the outer side wall of the door frame 1, a cylinder 4 is installed in the installation groove 3 on both sides of the door frame 1, and a telescopic hose 15 is fixedly connected to the piston rod end of the cylinder 4, a door panel 2 is slidably arranged inside the door frame 1, and horizontal sliding grooves 13 are symmetrically opened inside the door frame 1, and an installation rod 5 is slidably connected in the two sliding grooves 13, and one end of the door panel 2 is fixedly connected to the installation rod 5;
[0024] Both ends of the mounting rod 5 extend into the mounting groove 3. The end of the telescopic hose 15 is fixedly connected to the mounting rod 5. A telescopic air cylinder 8 is symmetrically installed at the end of the door frame 1 away from the door panel 2, and the air outlet of the telescopic air cylinder 8 is connected to the inside of the mounting groove 3. A Z-shaped mounting plate 16 for protecting the door panel 2 is provided at the end of the door panel 2 away from the mounting rod 5.
[0025] It should be noted that the telescopic air cylinder 8 is the foot-operated air pump in the prior art. When the door panel 2 squeezes the telescopic air cylinder 8, the gas inside is compressed. A support spring is also installed inside the telescopic air cylinder 8. As the door panel 2 squeezes it, the support spring plays a buffering role. The gas inside the telescopic air cylinder 8 is squeezed into the mounting groove 3, which can blow air and remove dust from the inside of the mounting groove 3.
[0026] Please see Figure 1 and Figure 2 A gusseted cloth 14 is installed inside the slide groove 13, and the end of the gusseted cloth 14 is fixedly connected to the mounting rod 5.
[0027] It should be noted that the accordion cloth 14 covers the outside of the slide rail 13 and extends and retracts with the movement of the mounting rod 5. Its core function is to prevent dust and seal, effectively preventing external dust and impurities from entering the interior of the slide rail 13, ensuring smooth movement of the door panel 2, and extending the service life of the equipment.
[0028] Please see Figure 1 and Figure 2 A vent pipe 11 is symmetrically installed on one end of the sliding groove 13 on the surface of the door frame 1. A connecting pipe 10 is fixedly connected to the air outlet end of the telescopic air cylinder 8, and the end of the connecting pipe 10 is connected to the vent pipe 11. Air outlets 12 are equidistantly arranged on the outer side of the vent pipe 11, and the end of the air outlet 12 extends into the mounting groove 3.
[0029] It should be noted that when the control system issues a door closing command, compressed air enters the rodless chamber (or corresponding chamber) of cylinder 4, pushing the piston rod to extend. The piston rod pushes the mounting rod 5 through the telescopic hose 15, thereby causing the door panel 2 to slide along the slide groove 13 inside the door frame 1, thus closing the door.
[0030] At the end of the closing stroke, when the door panel 2 is about to be fully closed, the mounting rod 5 will first contact the telescopic air cylinder 8. As the closing action continues, the mounting rod 5 will compress the telescopic air cylinder 8. At this time, the telescopic air cylinder 8 acts like an air pump, its volume decreases, and the internal air is rapidly compressed. This process converts the huge kinetic energy of the door panel 2 and the mounting rod 5 into the pressure potential energy of the compressed air. Since the gas is compressible, this process generates strong, non-rigid resistance, which effectively slows down the movement speed of the door panel 2 and achieves a smooth and gentle buffer until it is fully closed.
[0031] The compressed high-pressure air is delivered to the mounting slots 3 on both sides of the door frame 1 through the connecting pipe 10 and the vent pipe 11, so that the mounting slots 3 in the area where the accordion cloth 14 is located can be blown to remove dust; when the control system issues the door opening command, the compressed air enters the rod chamber or the opposite chamber of the cylinder 4, driving the piston rod to retract. The piston rod pulls the mounting rod 5 and the door panel 2 through the telescopic hose 15 to open. The telescopic air cylinder 8, which loses pressure, automatically resets and extends under the action of its internal support spring, preparing for the next door closing buffer.
[0032] When the door panel 2 is closed, the Z-shaped mounting plate 16 will first contact the sealing surface or material. If there is still a slight impact, the sliding block 18 will slide along the slide rod 19 in the strip-shaped connecting groove 17, compressing the buffer spring 20, which can further absorb the residual impact energy and protect the sealing surfaces of the door panel 2 and the door frame 1.
[0033] Please see Figure 1 A one-way air inlet valve is installed on the outside of the air inlet end of the telescopic air cylinder 8.
[0034] It should be noted that when the closing action is completed, the cylinder 4 drives the mounting rod 5 to retract, no longer compressing the telescopic air cylinder 8. At this time, the telescopic air cylinder 8 begins to return to its original position and extend under the action of its internal support spring. Its internal volume increases, forming a negative pressure. This negative pressure will cause the one-way air inlet valve to open automatically, and external air will be quickly drawn into the telescopic air cylinder 8 under the action of atmospheric pressure, so that it quickly returns to its initial state and prepares for the next buffer stroke.
[0035] Please see Figure 1 A positioning plate 7 is symmetrically fixed to the middle of the door panel 2. The door panel 2 is slidably connected between the two positioning plates 7. A limit plate 6 is symmetrically fixed to the top of the mounting rod 5.
[0036] It should be noted that the limiting plate 6 can limit the movement of the mounting rod 5 and prevent the mounting rod 5 from sliding through the two positioning plates 7.
[0037] Please see Figure 1 Limiting rods 9 are symmetrically fixed to the top and bottom of the telescopic air cylinder 8 on the inner wall of the door frame 1. The telescopic air cylinder 8 is telescopically arranged between the four limiting rods 9.
[0038] It should be noted that the limiting rod 9 can limit the extension and retraction of the telescopic air cylinder 8, ensuring that it extends and retracts in a straight line.
[0039] Please see Figure 3 and Figure 4 The door panel 2 has strip-shaped connecting grooves 17 at equal intervals at one end away from the mounting rod 5. Sliding blocks 18 are fixedly connected at equal intervals on the surface of the Z-shaped mounting plate 16, and the sliding blocks 18 are slidably connected in the strip-shaped connecting grooves 17. A sliding rod 19 is fixedly connected in the strip-shaped connecting grooves 17. The sliding blocks 18 are slidably connected to the outside of the sliding rod 19. A buffer spring 20 is sleeved between the inner wall of the strip-shaped connecting grooves 17 and the sliding blocks 18 on the outside of the sliding rod 19.
[0040] It should be noted that when the door panel 2 is closed, the Z-shaped mounting plate 16 at the end of the door panel 2 first contacts the inner wall of the door frame 1. Under the action of multiple buffer springs 20, it plays a buffering role, avoiding hard contact between the door panel 2 and the inner wall of the door frame 1.
[0041] Please see Figure 2 and Figure 3 Both the telescopic hose 15 and the telescopic air cylinder 8 are equipped with support springs.
[0042] It should be noted that the support springs inside the telescopic hose 15 and the telescopic air cylinder 8 serve to support and reset the system. When the door panel 2 is closed, the support springs help the telescopic air cylinder 8 to expand, allowing gas to enter the telescopic air cylinder 8 for cushioning during the next operation. The support springs inside the telescopic hose 15 effectively prevent the telescopic hose 15 from permanently bending, twisting, or collapsing during repeated telescopic movements.
[0043] Furthermore, the terms "first," "second," "third," and "fourth" 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. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.
[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pneumatic gate with a buffer function, characterized in that, The system includes a door frame (1), with an installation groove (3) on the outer side wall of the door frame (1). Cylinders (4) are installed in the installation grooves (3) on both sides of the door frame (1), and a telescopic hose (15) is fixedly connected to the piston rod end of the cylinder (4). A door panel (2) is slidably installed inside the door frame (1). Horizontal sliding grooves (13) are symmetrically opened inside the door frame (1), and an installation rod (5) is slidably connected to the two sliding grooves (13). One end of the door panel (2) is fixedly connected to the installation rod (5). Both ends of the mounting rod (5) extend into the mounting groove (3). The end of the telescopic hose (15) is fixed to the mounting rod (5). A telescopic air cylinder (8) is symmetrically installed in the door frame (1) at the end away from the door panel (2), and the air outlet of the telescopic air cylinder (8) is connected to the inside of the mounting groove (3). A Z-shaped mounting plate (16) for protecting the door panel (2) is provided at the end of the door panel (2) away from the mounting rod (5).
2. A pneumatic gate with buffer function according to claim 1, characterized in that: The slide (13) is fitted with a gusset cloth (14), and the end of the gusset cloth (14) is fixedly connected to the mounting rod (5).
3. A pneumatic gate with buffer function according to claim 1, characterized in that: A vent pipe (11) is symmetrically installed on one end of the sliding groove (13) on the surface of the door frame (1). A connecting pipe (10) is fixedly connected to the air outlet end of the telescopic air cylinder (8), and the end of the connecting pipe (10) is connected to the vent pipe (11). An air outlet (12) is provided at equal intervals on the outside of the vent pipe (11), and the end of the air outlet (12) extends into the mounting groove (3).
4. A pneumatic gate with buffer function according to claim 1, characterized in that: A one-way air inlet valve is installed on the outside of the air inlet end of the telescopic air cylinder (8).
5. A pneumatic gate with buffer function according to claim 1, characterized in that: The door panel (2) is symmetrically fixed with positioning plates (7) in the middle, and the door panel (2) is slidably connected between the two positioning plates (7). The top of the mounting rod (5) is symmetrically fixed with limit plates (6).
6. A pneumatic gate with buffer function according to claim 1, characterized in that: The inner wall of the door frame (1) is symmetrically fixed with limit rods (9) at the top and bottom of the telescopic air cylinder (8), and the telescopic air cylinder (8) is telescopically arranged between the four limit rods (9).
7. A pneumatic gate with buffer function according to claim 1, characterized in that: The door panel (2) has strip-shaped connecting grooves (17) equidistantly opened at one end away from the mounting rod (5). Sliding blocks (18) are fixedly connected to the surface of the Z-shaped mounting plate (16) at equal intervals, and the sliding blocks (18) are slidably connected in the strip-shaped connecting groove (17). A sliding rod (19) is fixedly connected in the strip-shaped connecting groove (17). The sliding blocks (18) are slidably connected to the outside of the sliding rod (19). A buffer spring (20) is sleeved between the inner wall of the strip-shaped connecting groove (17) and the sliding block (18) on the outside of the sliding rod (19).
8. A pneumatic gate with buffer function according to claim 1, characterized in that: Both the telescopic hose (15) and the telescopic air cylinder (8) are equipped with support springs.