A damper

Abstract

The present invention provides a wind valve, comprising a cylindrical tube with an interlayer and an arc slide, wherein at least one end of the cylindrical tube is open; a ventilation hole is provided on the side wall of the cylindrical tube; the arc slide is arranged in the interlayer of the cylindrical tube, and the arc slide can close or open the ventilation hole under the drive of a driving device.

Description

Technical Field

[0001] The invention belongs to the technical field of electric air valves. Background Art

[0002] With the development of air conditioning technology, pneumatic technology and air flow conveying technology, the implementation of online precise control technology for the direction and flow of pipeline air flow has become an indispensable and important demand, and electric damper (air valve) technology and products have emerged. Figure 1 As shown in the figure, a commonly used duct electric damper has three rotating valve discs (blades) linked by a connecting rod, and a driving motor drives the opening and closing of the three valve discs.

[0003] This rotary electric air valve connected to the air flow pipeline is easy to install, simple, reliable and economical.

[0004] However, this rotary electric air valve also has obvious disadvantages, mainly relatively poor sealing performance and high air leakage rate; poor mechanical strength and weak valve plate deformation resistance. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a wind valve, including a cylindrical tube with an interlayer and an arc slide, one end of the cylindrical tube is open; a ventilation hole is opened on the side wall of the cylindrical tube; the arc slide is arranged in the interlayer of the cylindrical tube, and the arc slide can close or open the ventilation hole under the drive of a driving device.

[0006] Preferably, the interlayer is further provided with a fixed arc piece for controlling the distance between the inner and outer cylindrical sleeves of the cylindrical tube, and the fixed arc piece is fixedly connected to the inner and outer cylindrical sleeves of the cylindrical tube respectively.

[0007] Preferably, the arc sliding plate and the fixed arc plate are arranged around the interlayer, and the arc sliding plate moves axially along the two side walls of the fixed arc plate under the drive of the driving device.

[0008] Preferably, the cylindrical tube comprises an inner cylindrical sleeve and an outer cylindrical sleeve, the outer cylindrical sleeve is coaxially fixedly sleeved on the outer circumference of the inner cylindrical sleeve, and the interlayer is provided between the inner cylindrical sleeve and the outer cylindrical sleeve;

[0009] One end of the inner cylindrical sleeve is open;

[0010] The two ends of the outer cylindrical sleeve are respectively sealed with the outer circumferential surface of the inner cylindrical sleeve;

[0011] The vent runs through the inner cylindrical sleeve and the outer cylindrical sleeve, and the fixed arc piece is staggered with the vent.

[0012] Preferably, the thickness of the fixed arc piece is greater than the thickness of the arc sliding piece.

[0013] Preferably, the driving device is arranged inside the cylindrical tube or outside the cylindrical tube.

[0014] Preferably, the driving device is a driving motor.

[0015] Preferably, the length and width of the arc sliding plate are respectively greater than the length and width of the vent.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] 1. Simple structure, high reliability, and air leakage rate close to zero

[0018] The present invention adopts a cylindrical tube with a sandwich layer, wherein the inner and outer layers are relatively fixed concentric cylindrical sleeves, and the middle sandwich layer is a fixed arc piece and an arc sliding piece used to fix and control the distance between the inner and outer cylindrical sleeves. The inner and outer cylindrical sleeves and the fixed arc piece of the middle layer can be directly cut from the corresponding pipe material, which is simple and easy to operate, has a simple structure and high reliability. Moreover, after the air valve is closed, due to the pressure difference between the inside and outside of the vent on the pipeline, the arc sliding piece is pressed against the inner cylindrical sleeve or the outer cylindrical sleeve, effectively sealing the gap on the sliding surface between the arc sliding piece and the inner cylindrical sleeve (or the outer cylindrical sleeve), resulting in an extremely low air leakage rate, almost to zero.

[0019] 2. High mechanical strength and strong resistance to deformation

[0020] The present invention adopts a cylindrical tube with an interlayer, wherein the inner and outer layers are relatively fixed concentric cylindrical sleeves, and the middle interlayer is a fixed arc piece and an arc sliding piece used to fix and control the distance between the inner and outer cylindrical sleeves. The arc sliding piece is always in the gap between the inner and outer cylindrical sleeves. The overall structure has high mechanical strength and strong anti-deformation ability.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a commonly used pipeline air valve;

[0024] Figure 2 A schematic structural diagram of a damper provided in a preferred embodiment 1 of the present invention;

[0025] Figure 3A schematic diagram of the internal structure of the air valve provided in the preferred embodiment 1 of the present invention;

[0026] Figure 4 A cross-sectional view of the internal structure of the air valve provided in the preferred embodiment 1 of the present invention;

[0027] Figure 5 A schematic diagram of the structure of the arc slide provided in the preferred embodiment 1 of the present invention when the vent is closed (when the air duct is exhausting air outward);

[0028] Figure 6 A schematic diagram of the structure of the arc slide provided in the preferred embodiment 1 of the present invention when the vent is closed (when the air duct is sucking air inward);

[0029] Figure 7 A schematic structural diagram of the air valve provided in the preferred embodiment 2 of the present invention and the air valve provided in the embodiment 1 being used in conjunction with each other;

[0030] Figure 8 This is a schematic structural diagram of the air valve provided in preferred embodiment 3 of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0032] Example 1

[0033] Please refer to Figures 2 to 4 This embodiment provides a damper 10 suitable for use in a circular air duct. The damper 10 comprises a cylindrical tube with an interlayer and an arc-shaped slide 3. One end of the cylindrical tube is open. When in use, the open end is connected to the circular air duct so that the inner passage of the cylindrical tube communicates with the circular air duct. The other end of the cylindrical tube is sealed. A vent is provided on the side wall of the cylindrical tube. The arc-shaped slide 3 is disposed in the interlayer of the cylindrical tube and can close or open the vent when driven by a drive device 4.

[0034] In this embodiment, the driving device 4 outputs a linear motion, that is, the arc slide 3 is driven by the driving device 4 to perform a linear motion.

[0035] The cylindrical tube includes an inner cylindrical sleeve 1 and an outer cylindrical sleeve 2. The outer cylindrical sleeve 2 is coaxially fixedly mounted on the outer circumference of the inner cylindrical sleeve 1, with an interlayer between the inner cylindrical sleeve 1 and the outer cylindrical sleeve 2. One end of the inner cylindrical sleeve 1 is open for connection to one end of the circular air duct; the other end of the inner cylindrical sleeve 1 is sealed (i.e., sealed). Both ends of the outer cylindrical sleeve 2 are sealed to the outer circumference of the inner cylindrical sleeve 1 to prevent air in the cylindrical tube from escaping through the interlayer when the arc-shaped slide 3 covers the vent. The vent runs through the inner cylindrical sleeve 1 and the outer cylindrical sleeve 2, i.e., the inner cylindrical sleeve 1 and the outer cylindrical sleeve 2 are both provided with vents at the same position. The open end of the outer cylindrical sleeve 2 is no longer than the open end of the inner cylindrical sleeve 1.

[0036] There is a gap between the inner cylindrical sleeve 1 and the outer cylindrical sleeve 2, forming an interlayer, which is provided with a fixed arc piece 5 and an arc slide 3. The fixed arc piece 5 is formed by an axial groove on the side of a section of circular tube, and this groove runs through both ends of this circular tube. On the one hand, the fixed arc piece 5 plays the role of fixing the inner cylindrical sleeve 1 and the outer cylindrical sleeve 2, that is, the fixed arc piece 5 is fixedly connected to the inner and outer cylindrical sleeves of the cylindrical tube respectively (such as threaded connection, welding, bonding, etc.), and on the other hand, it is used to control the spacing between the inner and outer cylindrical sleeves of the cylindrical tube. The arc slide 3 is arranged on this groove, and the arc slide 3 and the fixed arc piece 5 are surrounded by the interlayer of the cylindrical tube to form a circle. Under the drive of the driving device 4, the arc slide 3 moves axially along the two side walls of the fixed arc piece 5, that is, the arc slide 3 can slide axially on the above-mentioned groove.

[0037] In this embodiment, the vent is located at the slot, that is, the fixed arc piece 5 is staggered with the vent. The length and width of the vent are respectively smaller than the length and width of the slot, and the length and width of the arc sliding plate 3 are respectively larger than the length and width of the vent. The purpose is to ensure that the arc sliding plate 3 can completely cover the vent and prevent air leakage when the arc sliding plate 3 covers the vent.

[0038] In this embodiment, the circumferential angle of the fixed arc piece 5 is not less than the circumferential angle of the arc slide 3, and the height of the fixed arc piece 5 is greater than the height of the arc slide 3, so as to ensure that the arc slide 3 can slide axially on the slot of the arc piece.

[0039] In this embodiment, the drive device 4 is a conventional technical means in the art, such as an electric drive device, a pneumatic drive device, etc. In this embodiment, a drive motor, such as an electric push rod, is used as an example to drive the arc slide 3 to perform linear motion. In this embodiment, the drive motor is disposed in a cylindrical tube, which protects the drive motor.

[0040] When the air valve 10 of this embodiment is in operation, the arc slide 3 slides in the middle layer under the drive of the driving motor to complete the opening and closing of the vent: when the arc slide 3 slides away from the vent, the air valve 10 opens, and the air duct connecting the inside of the cylindrical tube with the outside of the vent is opened; when the arc slide 3 slides to completely cover the vent, the air valve 10 closes, and the air duct connecting the inside of the cylindrical tube with the outside of the vent is cut off.

[0041] In this embodiment, the thickness of the fixed arc piece 5 is greater than the thickness of the arc slide 3. When the vent is opened and the electric air valve 10 exhausts air outward, the inside of the cylindrical tube is positive pressure and the outside of the circular air duct is negative pressure. The air in the circular air duct is discharged to the outside of the electric air valve 10 through the vent; the inner cylindrical sleeve 1 is only used to limit the arc slide 3. After closing, the pressure difference between the inside and outside of the air duct presses the arc slide 3 against the inner surface of the outer cylindrical sleeve. Please refer to Figure 5 Therefore, the outer cylindrical sleeve 2 contains the air duct body.

[0042] When the vent is open and the circular air duct draws air inward, the inside of the cylindrical tube is negative pressure and the outside of the cylindrical tube is positive pressure. The air outside the vent is sucked into the cylindrical tube through the vent. The outer cylindrical sleeve 2 is only used to limit the arc slide 3. After closing, the pressure difference between the inside and outside of the air duct presses the arc slide 3 against the outer surface of the inner cylindrical sleeve 1. Please refer to Figure 6 Therefore, the inner cylindrical sleeve 1 contains the air duct body.

[0043] Example 2

[0044] This embodiment is a further improvement on the basis of the embodiment 1. This embodiment improves the cylindrical tube of the air valve 10 in the embodiment 1. The other structures are the same as those in the embodiment 1. This embodiment sets both ends of the cylindrical tube in the embodiment 1 as open, that is, both ends of the inner cylindrical sleeve 1 of the cylindrical tube in the embodiment 1 are set as open. When the air valve 10' of this embodiment is used, it is necessary to connect the two ends of the cylindrical tube of the air valve 10' to the ports of a circular air duct respectively. Please refer to Figure 7 For example, the air valve 10 ′ described in Example 2 is provided between the circular air duct 1 20 and the circular air duct 2 30 , and the air valve 10 described in Example 1 is provided at the end of the circular air duct 2 30 .

[0045] Example 3

[0046] This embodiment is a further improvement on the basis of embodiment 1 and embodiment 2. In this embodiment, please refer to Figure 8 The drive motor is arranged on the outside of the cylindrical tube to facilitate the maintenance of the drive motor.

[0047] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A damper, characterized in that: The invention comprises a cylindrical tube with an interlayer and an arc-shaped sliding plate, wherein at least one end of the cylindrical tube is open; a vent is formed on the side wall of the cylindrical tube; the arc-shaped sliding plate is arranged in the interlayer of the cylindrical tube, and the arc-shaped sliding plate can close or open the vent when driven by a driving device; The interlayer is further provided with a fixed arc piece for controlling the distance between the inner and outer cylindrical sleeves of the cylindrical tube, and the fixed arc piece is fixedly connected to the inner and outer cylindrical sleeves of the cylindrical tube respectively; The arc sliding plate and the fixed arc plate are arranged around the interlayer, and the arc sliding plate moves axially along the two side walls of the fixed arc plate under the drive of the driving device; The thickness of the fixed arc piece is greater than the thickness of the arc sliding piece; When the vent is open and the air valve is exhausting air outward, the inside of the cylindrical tube is positive pressure and the outside of the cylindrical tube is negative pressure. After closing, the pressure difference between the inside and outside of the air duct presses the arc slide against the inner surface of the outer cylindrical sleeve; When the vent is opened and the cylindrical tube draws air inward, there is negative pressure inside the cylindrical tube and positive pressure outside the cylindrical tube. After closing, the pressure difference between the inside and outside of the air duct presses the arc slide against the outer surface of the inner cylindrical sleeve.

2. The air valve according to claim 1, characterized in that: The cylindrical tube comprises an inner cylindrical sleeve and an outer cylindrical sleeve, wherein the outer cylindrical sleeve is coaxially fixedly sleeved on the outer circumference of the inner cylindrical sleeve, and the interlayer is provided between the inner cylindrical sleeve and the outer cylindrical sleeve; At least one end of the inner cylindrical sleeve is open; The two ends of the outer cylindrical sleeve are respectively sealed with the outer circumferential surface of the inner cylindrical sleeve; The vent runs through the inner cylindrical sleeve and the outer cylindrical sleeve, and the fixed arc piece is staggered with the vent.

3. The air valve according to claim 1, characterized in that: The driving device is arranged on the inner side or the outer side of the cylindrical tube.

4. The air valve according to claim 1, characterized in that: The driving device is a driving motor.

5. The air valve according to claim 1, characterized in that: The length and width of the arc sliding plate are respectively greater than the length and width of the vent.

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