A low-noise dual-plate damper with a buffer damping closing device

Abstract

This utility model discloses a low-noise double-plate air valve employing a buffer damping closing device. The air valve includes a column and two valve plates, with the valve plates connected to the column and rotatable around the column as an axis. The valve is characterized by further including a buffer damping closing device and a fixing component. The fixing component is mounted on the column, and the valve plates are provided with a slide rail and a slider matching the slide rail. The two ends of the buffer damping closing device are respectively connected to the fixing component and the slider. This utility model provides a low-noise, automatically closing double-plate air valve employing a buffer damping closing device.

Description

Technical Field

[0001] This utility model relates to the field of air valve technology, specifically a low-noise double-plate air valve with a buffer damping closing device. Background Technology

[0002] The ventilation system of livestock farms consists of multiple fans operating simultaneously. During production, these fans draw air out of the farm and ventilate it outside, creating a negative pressure environment relative to the outside atmospheric pressure. When a double-plate damper, using gravity-reset or spring-reset closing mechanisms, closes its valve from operation, the damper is affected not only by the tension of the closing spring or gravity but also by the suction force of the negative pressure within the farm. This causes it to close very quickly at the end of its closing motion. Therefore, the moment the damper completely closes, a tremendous impact force and significant noise are generated, typically exceeding 100 dB. Such noise causes stress to the animals in the farm, leading to startled behavior, injuries, and ultimately, production and economic losses. Furthermore, the significant impact force during closure negatively impacts the lifespan of the damper.

[0003] To address this issue, more expensive electrically operated double-plate dampers must be installed in actual aquaculture production, making control more complex. These dampers are activated by an electric actuator, unaffected by the airflow generated by the variable speed of the fan or the pressure inside the enclosure. Therefore, they close stably without causing impact or noise that could negatively impact production. However, these dampers require coordination between the electric actuator and the fan's start / stop control, and the high cost of the electric actuator and control system increases the overall cost of application. Utility Model Content

[0004] This invention provides a low-noise double-plate air valve that automatically closes upon power failure and employs a buffer damping closing device.

[0005] To achieve this objective, the present invention provides the following technical solution:

[0006] This utility model provides a low-noise double-plate air valve with a buffer damping closing device. The air valve includes a column and two valve plates. The valve plates are connected to the column and can rotate around the column as an axis. It also includes a buffer damping closing device and a fixing member. The fixing member is installed on the column. The valve plates are provided with a slide rail and a slider that matches the slide rail. The two ends of the buffer damping closing device are respectively connected to the fixing member and the slider.

[0007] In this embodiment, the buffer damping shut-off device is similar to existing dampers, including but not limited to hydraulic dampers.

[0008] Preferably, the buffer damping closing device includes a front mounting block, a rear mounting block, a front connecting block, a rear connecting block, a cylinder, a piston rod, and a front compression spring. The front compression spring is sleeved on the piston rod. The front connecting block and the rear connecting block are connected to the front end and the rear end of the piston rod, respectively. The piston rod is inserted into the cylinder and is mounted and connected through the front connecting block and the rear connecting block. One end of the front mounting block is connected to the front connecting block, and the other end is connected to the slider. One end of the rear mounting block is connected to the rear connecting block, and the other end is connected to the fixing member.

[0009] Preferably, the piston rod is a one-way valve structure, including a piston head with a cone, a movable sealing ring in the middle, and a piston guide block with a venting connection hole at the rear.

[0010] In this embodiment, the piston of the built-in piston rod of the buffer deceleration damping device is a one-way valve structure. When the piston rod extends, the front and rear cylinder chambers of the piston are connected and there is no back pressure. When the piston rod retracts, the sealing ring on the piston is sealed by the friction of the cylinder wall and the front cone of the piston. At this time, the front and rear cylinder chambers of the piston are no longer connected and back pressure is generated at the rear of the piston.

[0011] Preferably, the buffer deceleration damping device further includes a throttle valve, which is located at the air inlet / exhaust port at the tail. When the piston rod moves backward, the front and rear chambers of the piston are sealed and no longer connected, and a back pressure is formed at the rear. The back pressure is exhausted through the precisely adjustable resistance throttle valve at the tail exhaust port, forming resistance to slow down the final closing speed of the buffer deceleration damping device under the action of the air valve plate, thereby reducing the impact and noise of the air valve plate closing.

[0012] In this embodiment, an adjustable resistance throttle valve is installed at the air inlet and outlet of the buffer deceleration damping device. When the piston rod moves backward, the front and rear chambers of the piston are sealed and no longer connected, creating back pressure at the rear. The back pressure is exhausted through the precisely adjustable resistance throttle valve at the exhaust port of the device, forming resistance to slow down the final closing speed of the buffer deceleration damping device under the action of the air valve, thereby reducing the impact and noise of the air valve closing.

[0013] Preferably, the buffer deceleration damping device further includes a short compression spring, which is sleeved on the end of the piston rod.

[0014] In this embodiment, a short compression spring is installed at the tail end of the buffer deceleration damping device to provide resistance for the last stroke after the piston rod retracts, thereby helping to reduce the relatively fast closing speed of the damper plate and reduce the impact and noise of the damper plate closing.

[0015] Preferably, the front mounting block is connected to the slider by bolts.

[0016] Preferably, the rear mounting block is connected to the fastener by bolts.

[0017] Preferably, both the front connecting block and the rear connecting block are threadedly connected to the cylinder body.

[0018] Preferably, the fastener has three fixing slots, one of which is connected to the column, and the other two are connected to the buffer damping closing device.

[0019] Preferably, the three fixing slots are arranged at equal intervals on the same horizontal line.

[0020] The working principle of this low-noise double-plate damper with a buffer damping closing device is briefly summarized as follows:

[0021] S1. When the fan starts, the damper plate is blown open and is in a fully open state;

[0022] S2. When the air valve plate is opened, the buffer deceleration damping device is subjected to tension, and the compression spring at the front of the piston rod is compressed, generating tension on the air valve plate.

[0023] S3. Because the piston of the built-in piston rod of the buffer deceleration damping device is a one-way valve structure, when the piston rod extends, the front and rear cylinder chambers of the piston are connected and there is no back pressure.

[0024] S4. The fan stop valve plate closes under the action of the internal spring force of the buffer deceleration damping device. When the piston rod retracts, the piston upper sealing ring is sealed by the friction force of the cylinder wall and the front cone of the piston. At this time, the front and rear cylinder chambers of the piston are no longer connected, generating back pressure at the rear of the piston.

[0025] S5. When the piston rod retracts, the short compression spring provides resistance for the last stroke after the piston rod retracts, thus helping to reduce the relatively fast closing speed of the damper and reduce the impact and noise of the damper closing.

[0026] Compared with the prior art, the beneficial effects and significant progress of this utility model are as follows:

[0027] 1. This utility model provides a low-noise double-plate damper with a buffer damping closing device, which solves the problem of excessive impact and noise when the damper closes due to the negative pressure adsorption effect inside the building. When the negative pressure inside the building is 50Pa, the closing noise is reduced to less than 60dB.

[0028] 2. The low-noise double-plate air valve with buffer damping closing device provided by this utility model has a slow closing speed at the end of the closing action under the influence of negative pressure adsorption. At the same time, it ensures that the double-plate air valve can reliably and automatically close when the machine stops due to tension. Attached Figure Description

[0029] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0030] Obviously, the accompanying drawings described below are only some of the drawings of the present utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort, but these other drawings also belong to the drawings required for the embodiments of the present utility model.

[0031] Figure 1 This is a schematic diagram of the structure of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 1 of this utility model;

[0032] Figure 2 This is a valve plate closure diagram of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 1 of this utility model;

[0033] Figure 3 This is a diagram showing the unfolded valve plate of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 1 of this utility model.

[0034] Figure 4 This is a schematic diagram of the connection between the slider and the front mounting block of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 1 of this utility model.

[0035] Figure 5 This is a schematic diagram of the connection between the rear mounting block and the fixing component of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 2 of this utility model.

[0036] Figure 6 This is an exploded view of the buffer deceleration damping device of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 2 of this utility model.

[0037] Figure 7 This is a schematic diagram of the buffer deceleration damping device of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 1 of this utility model.

[0038] Figure 8 This is a schematic diagram of the buffer deceleration damping device of a low-noise double-plate air valve with a buffer damping closing device in two states, according to Embodiment 2 of this utility model.

[0039] Figure 9 This is a schematic diagram of the fixing component structure of a low-noise double-plate air valve with a buffer damping closing device according to Embodiment 2 of this utility model;

[0040] The attached figures are labeled as follows: 1. Cylinder body; 2. Piston rod; 3. Front compression spring; 4. Front mounting block; 5. Rear mounting block; 6. Short compression spring; 7. Front connecting block; 8. Rear connecting block; 9. Fixing component; 10. Column; 11. Valve plate; 12. Slide rail; 13. Slider; 2.1. Piston head; 2.2. Sealing ring; 2.3. Piston guide block. Detailed Implementation

[0041] To make the objectives, technical solutions, beneficial effects and significant advancements of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings provided in the embodiments of this utility model.

[0042] Obviously, all the embodiments described are only some embodiments of this utility model, and not all embodiments; based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] It should be noted that the terms "first," "second," and "third" (if present), etc., in the specification, claims, and accompanying drawings of the embodiments of this utility model are only used to distinguish different objects and not to describe a specific order. Furthermore, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0044] What needs to be understood is:

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "fixing" and other such terms should be interpreted broadly. For example, it can be a fixed connection, a detachable connection or a movable connection, or it can be integrated; it can be a direct connection, an indirect connection through an intermediate medium, or an invisible signal connection, or even an optical connection; it can be the internal connection of two components or the interaction between two components, unless otherwise explicitly limited.

[0046] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] It should also be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0048] The technical solution of this utility model will now be described in detail with reference to specific embodiments.

[0049] Example 1

[0050] like Figure 1-3 As shown, a low-noise double-plate air valve with a buffer damping closing device is disclosed. The air valve includes a column 10 and two valve plates 11. The valve plates 11 are connected to the column 10 and can rotate around the column 10 as an axis.

[0051] like Figure 1-5 As shown, the low-noise dual-plate air valve with buffer damping closing device in this embodiment also includes buffer damping closing device and fixing member 9. Fixing member 9 is installed on column 10. The valve plate 11 is provided with slide rail 12 and slider 13 matching slide rail 12. The two ends of buffer damping closing device are respectively connected to fixing member 9 and slider 13.

[0052] like Figure 6-8 As shown, the buffer damping closing device includes a front mounting block 4, a rear mounting block 5, a front connecting block 7, a rear connecting block 8, a cylinder 1, a piston rod 2, and a front compression spring 3. The front compression spring 3 is sleeved on the piston rod 2. The front connecting block 7 and the rear connecting block 8 are connected to the front and rear ends of the piston rod 2. The piston rod 2 is inserted into the cylinder 1 and is connected by the front connecting block 7 and the rear connecting block 8. One end of the front mounting block 4 is connected to the front connecting block 7, and the other end is connected to the slider 13. One end of the rear mounting block 5 is connected to the rear connecting block 8, and the other end is connected to the fixing member 9. The piston rod 2 has a one-way valve structure, including a piston head 2.1 with a cone, a movable sealing ring 2.2 in the middle, and a piston guide block 2.3 with a vent hole at the rear.

[0053] In this embodiment, the buffer deceleration damping device also includes a throttle valve, which is located at the air inlet / exhaust port at the tail. When the piston rod moves backward, the front and rear chambers of the piston are sealed and no longer connected, and a back pressure is formed at the rear. The back pressure is exhausted through the precisely adjustable resistance throttle valve at the tail exhaust port, forming resistance to slow down the final closing speed of the buffer deceleration damping device under the action of the air valve plate, thereby reducing the impact and noise of the air valve plate closing.

[0054] In this embodiment, the buffer deceleration damping device further includes a short compression spring 6, which is sleeved on the end of the piston rod 2.

[0055] like Figure 4 As shown, the front mounting block 4 is connected to the slider 13 by bolts.

[0056] like Figure 5 As shown, the rear mounting block 5 is connected to the fastener 9 by bolts.

[0057] like Figure 6As shown, the front connecting block 7 and the rear connecting block 8 are both threadedly connected to the cylinder body 1.

[0058] like Figure 9 As shown, the fixing member 9 has three fixing slots, one of which connects to the column, and the other two of which connect to the buffer damping closing device. The three fixing slots are arranged at equal intervals on the same horizontal line.

[0059] To more clearly introduce the low-noise dual-plate air valve with a buffer damping closing device in this embodiment, its structure and principle are briefly summarized below:

[0060] S1. When the fan starts, the damper plate is blown open and is in a fully open state;

[0061] S2. When the air valve plate is opened, the buffer deceleration damping device is subjected to tension, and the compression spring at the front of the piston rod is compressed, generating tension on the air valve plate.

[0062] S3. Because the piston of the built-in piston rod of the buffer deceleration damping device is a one-way valve structure, when the piston rod extends, the front and rear cylinder chambers of the piston are connected and there is no back pressure.

[0063] S4. The fan stop valve plate closes under the action of the internal spring force of the buffer deceleration damping device. When the piston rod retracts, the piston upper sealing ring is sealed by the friction force of the cylinder wall and the front cone of the piston. At this time, the front and rear cylinder chambers of the piston are no longer connected, generating back pressure at the rear of the piston.

[0064] S5. When the piston rod retracts, the short compression spring provides resistance for the last stroke after the piston rod retracts, thus helping to reduce the relatively fast closing speed of the damper and reduce the impact and noise of the damper closing.

[0065] In the description process of the above instruction manual:

[0066] The terms "this embodiment," "this utility model embodiment," "as shown," "further," and "further improved technical sub-scheme," etc., refer to specific features, structures, materials, or characteristics described in the embodiment or example that are included in at least one embodiment or example of the present utility model. In this specification, the illustrative expressions of the above terms are not necessarily directed at the same embodiment or example, and the specific features, structures, materials, or characteristics described can be combined or combined in any suitable manner in one or more embodiments or examples. Furthermore, without causing contradiction, those skilled in the art can combine or combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0067] Finally, it should be noted that:

[0068] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it;

[0069] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. Non-essential improvements, adjustments or substitutions made by those skilled in the art based on the content of this specification are all within the scope of protection claimed by the present invention.

Claims

1. A low-noise double-plate damper employing a buffer damping closing device, the damper comprising a column and two valve plates, the valve plates being connected to the column and rotatable about the column, characterized in that, It also includes a buffer damping closing device and a fixing component. The fixing component is installed on the column. The valve plate is provided with a slide rail and a slider that matches the slide rail. The two ends of the buffer damping closing device are respectively connected to the fixing component and the slider.

2. A low-noise double-plate damper with a buffer damping closing device as described in claim 1, characterized in that, The buffer damping closing device includes a front mounting block, a rear mounting block, a front connecting block, a rear connecting block, a cylinder, a piston rod, and a front compression spring. The front compression spring is sleeved on the piston rod. The front connecting block and the rear connecting block are connected to the front and rear ends of the piston rod. The piston rod is inserted into the cylinder and is mounted and connected through the front connecting block and the rear connecting block. One end of the front mounting block is connected to the front connecting block, and the other end is connected to the slider. One end of the rear mounting block is connected to the rear connecting block, and the other end is connected to the fixing member.

3. A low-noise double-plate damper with a buffer damping closing device as described in claim 2, characterized in that, The piston rod has a one-way valve structure, including a piston head with a cone, a movable sealing ring in the middle, and a piston guide block with a venting connection hole at the rear.

4. A low-noise double-plate damper with a buffer damping closing device as described in claim 1, characterized in that, The buffer deceleration damping device also includes a throttle valve, which is located at the air inlet / exhaust port at the tail. When the piston rod moves backward, the front and rear chambers of the piston are sealed and no longer connected, forming back pressure at the rear. The back pressure is exhausted through the precisely adjustable resistance throttle valve at the tail exhaust port, forming resistance to slow down the final closing speed of the buffer deceleration damping device under the action of the air valve plate, thereby reducing the impact and noise of the air valve plate closing.

5. A low-noise double-plate damper with a buffer damping closing device as described in claim 2, characterized in that, The buffer deceleration damping device also includes a short compression spring, which is sleeved on the end of the piston rod.

6. A low-noise double-plate damper with a buffer damping closing device as described in claim 1, characterized in that, The front mounting block is connected to the slider by bolts.

7. A low-noise double-plate damper with a buffer damping closing device as described in claim 1, characterized in that, The rear mounting block is connected to the fastener by bolts.

8. A low-noise double-plate damper with a buffer damping closing device as described in claim 1, characterized in that, Both the front connecting block and the rear connecting block are threadedly connected to the cylinder body.

9. A low-noise double-plate damper with a buffer damping closing device as described in claim 1, characterized in that, The fastener has three fixing slots, one of which is connected to the column, and the other two are connected to the buffer damping closing device.

10. A low-noise double-plate damper with a buffer damping closing device as described in claim 1, characterized in that, The three fixing slots are arranged at equal intervals on the same horizontal line.

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