Limiting device and shutter air door

Abstract

The invention relates to the technical field of air door opening, and discloses a limiting device and a shutter air door. The limiting device comprises a connecting unit and a supporting unit, by arranging the connecting unit and the supporting unit, the connecting unit and the supporting unit are combined in the process of adjusting the opening of a first shutter part to be large or small; and the rotation angle of each blade is fixed, so that the opening degree of each blade is prevented from being influenced by mistaken touch in related technologies, and the technical effect of fixing stability of the rotation angle of each blade is achieved.

Description

Technical Field

[0001] This invention relates to the field of damper opening adjustment technology, specifically to a limiting device and a louvered damper. Background Technology

[0002] High-temperature gas-cooled reactors (HTGRs) are an advanced fourth-generation nuclear power reactor technology with advantages such as high safety, high efficiency, good economics, and wide applicability. HTGRs generate electricity through the conversion of nuclear energy into thermal energy, mechanical energy, and electrical energy, and can replace traditional fossil fuels, achieving coordinated economic and environmental development.

[0003] The inlet damper in the waste heat removal system of the high-temperature gas-cooled reactor is a manually operated louvered damper. Specifically, the manually operated louvered damper has a louvered structure and includes: The blade has multiple blades, including first blades and second blades that are arranged adjacently and stacked. Part of the first blade is stacked on top of the second blade, and so on. When the blade includes a third blade, part of the second blade is stacked on top of the third blade. A rotating unit is provided inside each blade. The rotation of the rotating unit can drive the rotation of the blade to adjust the opening of the first blade and the opening of the second blade. The first blade between the rotating unit in the first blade and the rotating unit in the second blade is set as the first louver. The second blade between the rotating unit in the first blade and the rotating unit in the second blade is set as the second louver. The remaining part of the second blade is set as the third louver. A drive unit, connected to each rotating unit, is used to drive the rotation of the blade angle through the rotating unit. For example, the rotating unit connected to the first blade is equipped with a handwheel. The handwheel is driven by external force to drive the rotation of the rotating unit. Adjacent rotating units are equipped with meshing gears so that the rotation of the handwheel can drive the rotation of each blade.

[0004] Specifically, the user controls the rotation of the drive unit to rotate the rotating unit, thereby adjusting the rotation angle of the blades and thus adjusting the damper opening. When the manual louvered damper is closed, adjacent blades are in contact to completely block the medium (such as wind or dust). When the manual louvered damper is open, the blades rotate at a certain angle to adjust the flow cross-sectional area; the larger the rotation angle, the greater the flow speed of the medium per unit time.

[0005] However, during this process, since the manual louver damper does not have a structure to limit the opening of the blades, when the drive unit or blades are accidentally touched, it is easy to affect the opening of the blades, resulting in inaccurate adjustment of the fluid velocity ratio in the pipeline and affecting the normal use of the manual louver damper. Summary of the Invention

[0006] In view of this, the present invention provides a limiting device and a louvered damper to solve the problem of the inlet damper in the waste heat removal system of a high-temperature gas-cooled reactor being a manually operated louvered damper. The manually operated louvered damper includes blades, a rotating unit, and a drive unit. The user controls the rotation of the drive unit to drive the rotating unit, thereby adjusting the rotation angle of the blades and thus adjusting the damper opening. When the manually operated louvered damper is closed, adjacent blades are in contact, completely blocking the medium (such as wind or dust). When the manually operated louvered damper is open, the blades rotate at a certain angle to adjust the flow cross-sectional area; the larger the rotation angle, the greater the flow rate of the medium per unit time. However, during this process, because the manually operated louvered damper lacks a structure to limit the blade opening, accidental contact of the drive unit or blades can easily affect the blade opening, leading to inaccurate adjustment of the fluid velocity ratio in the pipeline and affecting the normal operation of the manually operated louvered damper.

[0007] In a first aspect, the present invention provides a limiting device for limiting the rotation angle of each blade, the limiting device comprising: A connecting unit is fixedly connected to the first louver portion of the first blade so that when the opening of the first louver portion is adjusted, the connecting unit limits the rotation angle of each blade; and / or, the connecting unit is fixedly connected to the first louver portion and to the third louver portion of the second blade so that when the opening of the first blade and the second blade is adjusted, the connecting unit limits the rotation angle of each blade. A support unit, connected to the connecting unit, the support unit having a relaxed first state and a second state defining the opening of each of the blades.

[0008] Beneficial effects: By setting up a connecting unit and a supporting unit, when the connecting unit is only connected to the first louver and before the position of the first louver is determined, the supporting unit is in a first state. After the rotation angle of the first louver is determined, the supporting unit is adjusted from the first state to the second state so that when the opening of the first louver is reduced, the rotation angle of the first louver is limited by the supporting unit, that is, the opening of the first louver is limited, so as to further limit the rotation angle of each blade by the first louver.

[0009] Furthermore, before the connecting unit is connected to both the first and third louvers and the positions of the first and third louvers are determined, the support unit is in the first state. After the rotation angles of the first and third louvers are determined, the support unit is adjusted from the first state to the second state so that when the opening of the first louver is increased, the rotation angles of the first and third louvers are limited by the support unit, so as to further limit the rotation angles of each blade by the first and third louvers.

[0010] Based on this, during the process of increasing or decreasing the opening of the first 100-blade section, the connecting unit and the support unit work together to fix the rotation angle of each blade, avoiding accidental touches that could affect the opening of each blade in related technologies, thereby achieving the technical effect of fixing the stability of the rotation angle of each blade.

[0011] In one optional implementation, the connection unit includes: The connection structure is provided with a first mounting groove, which contains one end of the first louver portion that is close to the second blade and / or the other end of the third louver portion that is away from the first louver portion.

[0012] Beneficial effect: By setting up a connecting structure, the connection and fixation between the connecting structure and the first louver, as well as between the connecting structure and the third louver, can be achieved.

[0013] In one alternative embodiment, the first louver and the connecting structure, and / or the third louver and the connecting structure are detachably connected.

[0014] Beneficial effects: By defining detachable connections between the first louver and the connecting structure, and between the third louver and the connecting structure, the connecting unit can be replaced, facilitating maintenance and thus improving the ease of maintenance of the limiting device.

[0015] In one optional embodiment, the connecting structure is provided with a first threaded hole communicating with the first mounting groove, and the connecting unit includes: The abutting structure is threadedly connected to the first threaded hole, and the abutting structure abuts against the first louver and / or the abutting structure abuts against the third louver.

[0016] Beneficial effects: By setting up an abutment structure to connect threadedly to the first threaded hole, and by extending the abutment structure through the first threaded hole to abut the first and third louvers, a detachable connection is achieved between the connecting unit and the first louver, and between the connecting unit and the third louver. The abutment structure is simple in structure, thereby achieving the technical effect of improving the reliability of the limiting device.

[0017] In one optional embodiment, when the opening of the first louver is reduced and the limiting device limits the rotation angle of each of the blades; the support unit includes: A support structure is slidably connected to the connecting unit. The support structure has a first state in which it is separated from the second louver and a second state in which it abuts against the surface of the second louver.

[0018] Beneficial effects: By setting up a support structure that is slidably connected to the connecting unit, when the rotation angle of the first louver is uncertain, the support structure moves away from the connecting unit, at which point the support structure is in its first state. After the rotation angle of the first louver is determined, the support structure moves towards the second louver, thus adjusting the support structure from the first state to the second state.

[0019] In one alternative embodiment, the support structure is threadedly connected to the connecting unit.

[0020] In one optional embodiment, when the opening of the first louver and the third louver is increased, the limiting device is used to limit the rotation angle of each louver. At least two connecting units are provided, at least one of the connecting units is fixedly connected to the first louver, and at least one of the connecting units is fixedly connected to the third louver.

[0021] In one optional implementation, the support unit includes: The adjustment structure has at least two parts, and each part is connected to the connecting unit. A rotating structure is threadedly connected to at least two of the adjusting structures, and the rotating structures are threaded in opposite directions along their axial directions, such that at least two of the rotating structures move closer to or further away from each other along the axial straight line of the adjusting structure, and the position between the second louver and the third louver is defined by the distance between adjacent rotating structures.

[0022] In one optional embodiment, the connecting unit is provided with a second mounting groove, and the adjusting structure is provided with a fixing rod, the fixing rod being connected to the inner wall of the second mounting groove.

[0023] Secondly, the present invention also provides a louvered damper, comprising: Door frame; At least two blades, including a first blade and a second blade arranged adjacent to each other and stacked, with a portion of the first blade stacked on top of the second blade, and each blade is hinged to the door frame; A rotating unit is disposed within each of the blades to allow the blades to be hinged to the door frame; A drive unit, connected to the rotating unit, is used to drive the rotation of each of the rotating units; The aforementioned limiting device is connected to the first blade and / or fixedly connected to the second blade.

[0024] Beneficial effects: Since the louvered damper includes a limiting device, it has the same effect as the limiting device, which will not be elaborated here. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the louvered damper when the opening of the first louver section is adjusted in this embodiment; Figure 2 This is a schematic diagram of the structure of the limiting device for adjusting the opening of the first louver in this embodiment; Figure 3 for Figure 2 The front view; Figure 4 for Figure 2 Top view; Figure 5 for Figure 2 Side view; Figure 6 This is a schematic diagram of the limiting device for adjusting the opening of the first louver in this embodiment.

[0027] Explanation of reference numerals in the attached figures: 1. First leaf blade; 101. First louver section; 2. Second leaflet; 201. Second louver section; 202. Third louver section; 3. Connection unit; 301. Connecting structure; 3011. First connecting member; 3012. Second connecting member; 3013. Third connecting member; 302. First mounting slot; 303. Abutment structure; 4. Support unit; 401. Support structure; 402. Fixed structure; 403. Adjustable structure; 404. Rotating structure; 5. Rotating unit. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, in one aspect, a limiting device is provided for limiting the rotation angle of each blade, the limiting device comprising: The connecting unit 3 is fixedly connected to the first louver 101 so that when the opening of the first louver 101 is adjusted, the connecting unit 3 limits the rotation angle of each blade; and / or, the connecting unit 3 is fixedly connected to the first louver 101 and to the third louver 202 so that when the opening of the first blade 1 and the second blade 2 is adjusted, the connecting unit 3 limits the rotation angle of each blade. Support unit 4 is connected to connection unit 3. Support unit 4 has a first relaxed state and a second state that limits the opening of each blade.

[0031] In the limiting device of this embodiment, by providing a connecting unit 3 and a supporting unit 4, when the connecting unit 3 is only connected to the first louver 101 and before the position of the first louver 101 is determined, the supporting unit 4 is in a first state. After the rotation angle of the first louver 101 is determined, the supporting unit 4 is adjusted from the first state to the second state so that when the opening of the first louver 101 is reduced, the rotation angle of the first louver 101 is limited by the supporting unit 4, that is, the opening of the first louver 101 is limited, so as to further limit the rotation angle of each blade by the first louver 101.

[0032] Furthermore, before the connecting unit 3 is connected to both the first louver 101 and the third louver 202, and before the positions of the first louver and the third louver 202 are determined, the support unit 4 is in the first state. After the rotation angles of the first louver 101 and the third louver 202 are determined, the support unit 4 is adjusted from the first state to the second state so that when the opening of the first louver 101 is increased, the support unit 4 limits the rotation angles of the first louver 101 and the third louver 202, so as to further limit the rotation angles of each blade through the first louver 101 and the third louver 202.

[0033] Based on this, during the process of increasing or decreasing the opening of the first louver 101, the connecting unit 3 and the supporting unit 4 are combined to fix the rotation angle of each blade, so as to avoid accidental contact in related technologies that may affect the opening of each blade, thereby achieving the technical effect of fixing the stability of the rotation angle of each blade.

[0034] Of course, in other embodiments, it is also possible to limit the connection unit 3 to the first louver portion 101 of the first blade 1. In this case, when it is necessary to adjust the opening of each blade, the opening of the first blade 1 can only be adjusted to the maximum first, and then gradually reduced to the required angle. Alternatively, it is possible to limit the connection unit 3 to the first louver portion 101 of the first blade 1 and the third louver portion 202 of the second blade 2. In this case, when it is necessary to adjust the opening of each blade, the opening of the first blade 1 and the second blade 2 can only be gradually adjusted from a small opening to a large opening to the required angle.

[0035] In addition, combined Figure 2 and Figure 3 As shown, in this embodiment, the connection unit 3 includes: The connecting structure 301 is provided with a first mounting groove 302. At least three connecting structures 301 are provided, and the first mounting groove 302 of one connecting structure 301 accommodates one end of the first louver 101 near the second louver 201. At this time, the connecting unit 3 is used to limit the rotation angle of each blade when the opening degree of the first louver 101 is adjusted.

[0036] Another connecting structure 301 has a first mounting groove 302 that accommodates one end of the first louver 101 near the second louver 201. Simultaneously, another connecting structure 301 has a first mounting groove 302 that accommodates one end of the third louver 202 away from the first louver 101. At this time, when the opening of the first louver 101 is increased, the connecting unit 3 limits the rotation angle of each blade.

[0037] The connection structure 301 is provided to achieve the connection and fixation between the connection structure 301 and the first louver 101, and between the connection structure 301 and the third louver 202.

[0038] Preferably, the first louver 101 and the connecting structure 301, and the third louver 202 and the connecting structure 301 are detachably connected. That is, when the opening of the first blade 1 is reduced, one connecting structure 301 is detachably connected to the first louver 101. When the opening of the first blade 1 and the second blade 2 is increased, another connecting structure 301 is detachably connected to the first louver 101, and yet another connecting structure 301 is detachably connected to the third louver 202.

[0039] Based on this, the connecting unit 3 can be replaced to facilitate the maintenance of the connecting unit 3, thereby achieving the technical effect of improving the ease of maintenance of the limit device.

[0040] Specifically, in combination Figure 2 As shown, in this embodiment, the connection structure 301 includes: First connector 3011; The second connecting member 3012 is arranged at an interval from the first connecting member 3011; The third connecting member 3013 has one end connected to the first connecting member 3011, and the other end of the third connecting member 3013 is connected to the second connecting member 3012. The area enclosed by the third connecting member 3013, the second connecting member 3012, and the first connecting member 3011 serves as the first installation groove 302.

[0041] Specifically, the first connecting member 3011, the second connecting member 3012, and the third connecting member 3013 enclose a "C" shape, so that there is no need to additionally set the first installation groove 302, and the connecting structure 301 can cooperate with the abutting structure 303 to form an abutment against the first louver part 101, thereby achieving the technical effect of improving the simplicity of manufacturing the limiting device.

[0042] Of course, in other embodiments, according to different designs of the limiting device, the shape enclosed by the first connecting member 3011, the second connecting member 3012, and the third connecting member 3013 is adjusted.

[0043] In other embodiments, according to different designs of the limiting device, the specific structure of the connecting structure 301 is adjusted.

[0044] In addition, as shown in Figures 2 to 5 In this embodiment, the connecting structure 301 is provided with a first threaded hole communicating with the first installation groove 302. Specifically, the first connecting structure is provided with a first threaded hole, and the connecting unit 3 includes: An abutting structure 303 is threadedly connected to the first threaded hole to abut against the first louver part 101 and / or the third louver part 202, realizing the detachable connection between the connecting structure 301 and the first louver part 101, and between the connecting structure 301 and the third louver part 202.

[0045] Among them, there are at least three abutting structures 303. When the opening degree of the first blade 1 is reduced, one abutting structure 303 abuts against the first louver part 101. When the opening degrees of the first blade 1 and the second blade 2 are increased, another abutting structure 303 cooperates with another abutting structure 303, another abutting structure 303 abuts against the first louver part 101, and another abutting structure 303 abuts between the third louver part 202.

[0046] By providing an abutment structure 303, a threaded connection is established between the abutment structure 303 and the first threaded hole. The length of the abutment structure 303 extending through the first threaded hole abuts against the first louver portion 101 and the third louver portion 202, achieving a detachable connection between the connecting unit 3 and the first louver portion 101, and between the connecting unit 3 and the third louver portion 202. The abutment structure 303 has a simple structure, thereby improving the ease of processing the limiting device.

[0047] In this embodiment, the abutment structure 303 is a bolt. Of course, in other embodiments, the type of abutment structure 303 may be adjusted according to the design of the limiting device. For example, the abutment structure 303 may be a screw. As long as a threaded connection between the abutment structure 303 and the first mounting groove 302 can be achieved, it is within the protection scope of this invention.

[0048] Of course, in other embodiments, depending on the design of the limiting device, the abutment structure 303 may not be provided, limiting the threaded connection between the first louver 101 and the connecting structure 301, and between the third louver 202 and the connecting structure 301. That is, both the first louver 101 and the third louver 202 may have threaded holes, or only the first louver 101 and the connecting structure 301 may be detachably connected, or only the third louver 202 and the connecting structure 301 may be detachably connected, all of which are within the protection scope of this invention. Alternatively, the method of detachable connection may be adjusted, such as a snap-fit ​​connection.

[0049] As an alternative implementation, when the opening of the first louver 101 is adjusted, a connecting structure 301 is connected to the end of the third louver 202 that is located away from the first louver 101, and at this time, an abutting structure 303 abuts against the third louver 202.

[0050] Example 1 In this embodiment, when the opening of the first louver 101 is adjusted, the limiting device limits the rotation angle of each louver.

[0051] Combination Figures 2 to 5 As shown, the support unit 4 includes: The support structure 401 is slidably connected to the connecting unit 3. The support structure 401 has a first state that is separated from the second louver 201 and a second state that abuts against the surface of the second louver 201.

[0052] By providing a support structure 401, which is slidably connected to the connecting unit 3, the support structure 401 moves away from the connecting unit 3 when the rotation angle of the first louver 101 is undetermined; in this state, the support structure 401 is in a first state. After the rotation angle of the first louver 101 is determined, the support structure 401 moves towards the second louver 201, thus adjusting the support structure 401 from the first state to the second state.

[0053] Specifically, in combination Figure 1 As shown, the rotating unit 5 rotates around Figure 1 When rotating in the M direction, in order to adjust the direction of reducing the opening of the louver damper, in this embodiment, taking the connection unit 3 and the first blade 1 as an example, that is, the connection unit 3 and the first louver 101 as an example, after the rotation angle of the first louver 101 is determined, the support structure 401 is in the second state, abutting against the surface of the second louver 201. When the rotation unit 5 continues to drive the first blade 1 and the second blade 2 to rotate in the M direction, the first louver 101 has a tendency to rotate in the N direction, and the second louver 201 has a tendency to rotate in the M direction, resulting in the rotation directions of the first louver 101 and the second louver 201 being opposite, so that the rotation of the support structure 401 and the second louver 201 is locked, and cannot continue to rotate in the direction of reducing the opening, so as to limit the position between the first louver 101 and the second louver 201, and limit the opening of each blade.

[0054] Furthermore, the support structure 401 is threadedly connected to the connecting unit 3. Specifically, in this embodiment, the support structure 401 is a bolt. By limiting the threaded connection between the support structure 401 and the connecting unit 3, the support structure 401 can switch its state through the degree of threaded connection.

[0055] Of course, in other embodiments, the specific structure of the support structure 401 may be adjusted according to the design of the limiting device, for example, the support structure 401 may be a screw.

[0056] In other embodiments, depending on the design of the limiting device, the connection method between the support unit 4 and the connecting unit 3 can be adjusted. For example, the support structure 401 and the connecting unit 3 can be connected by a snap-fit, which can also achieve the fixation of the position of the connecting unit 3 by the support structure 401.

[0057] Furthermore, in this embodiment, combined with Figures 2 to 5 As shown, in this embodiment, the support unit 4 includes: The fixing structure 402 is connected to the side of the third connector 3013 away from the first mounting groove 302. The fixing structure 402 is provided with a second threaded hole that is threaded to the support structure 401, so that the support structure 401 can be adjusted by passing through the length of the second threaded hole.

[0058] As an alternative implementation, the support unit 4 may not include the fixing structure 402. In this case, the fixing structure 402 serves as part of the connecting unit 3 and can also achieve a threaded connection between the support structure 401 and the connecting unit 3.

[0059] In addition, in this embodiment, along Figure 1 In the X-axis direction, the support structure 401 has two components. Based on this, the technical effect of improving the reliability of the support structure 401 in limiting the angle of each blade can be achieved.

[0060] Of course, in other embodiments, the number of support structures 401 may be adjusted depending on the design of the limiting device. For example, there may be one support structure 401 or more than two support structures 401.

[0061] Example 2 In this embodiment, the connecting unit 3 is used to limit the rotation angle of each blade when the opening of the first louver 101 is increased.

[0062] At this time, at least two connecting structures 301 are provided. For example, in this embodiment, two connecting structures 301 are provided. The first mounting groove 302 of one connecting structure 301 is used to accommodate the end of the first louver 101 near the second louver 201, and the connecting structure 301 is fixedly connected to the first louver 101. The first mounting groove 302 of the other connecting structure 301 is used to accommodate the end of the third louver 202 away from the second louver 201, and the other connecting structure 301 is fixedly connected to the second louver 201.

[0063] Of course, in other embodiments, the number of connecting structures 301 may be adjusted depending on the design of the limiting device.

[0064] Combination Figure 6 As shown, in this embodiment, when the opening of the first louver 101 is increased, the rotation angle of each blade is limited. At least two connecting units 3 are provided, at least one connecting unit 3 is fixedly connected to the first louver 101, and at least one connecting unit 3 is fixedly connected to the third louver 202.

[0065] In this embodiment, two connecting units 3 are provided. One connecting unit 3 is fixedly connected to the first louver 101, and the other connecting unit 3 is fixedly connected to the third louver 202.

[0066] Of course, in other embodiments, the number of connecting units 3 may be adjusted according to the design of the limiting device. For example, there may be three or more connecting units 3, all of which are within the protection scope of this invention.

[0067] In addition, combined Figure 6 As shown, in this embodiment, the support unit 4 includes: The adjustment structure 403 is provided in at least two parts and is connected to the connection unit 3 one by one; The rotating structure 404 is threadedly connected to at least two adjusting structures 403, and the rotating structure 404 is in the opposite direction along its axial direction, so that at least two rotating structures 404 move closer or further away from each other along the axial direction of the adjusting structure 403, and the position between the second louver 201 and the third louver 202 is defined by the distance between adjacent rotating structures 404.

[0068] That is, there are two threads in sequence along the axial direction of the rotating structure 404. One thread is threaded to an adjusting structure 403, and the other thread is threaded to another adjusting structure 403.

[0069] The adjusting structure 403 is a lead screw nut, and the rotating structure 404 is a screw. There are two adjusting structures 403 and one rotating structure 404.

[0070] When the opening of the first louver 101 and the third louver 202 is adjusted from small to large, one connecting unit 3 is first fixedly connected to the first louver 101, and the other connecting unit 3 is fixedly connected to the third louver 202.

[0071] Next, an external force drives the first louver 101 and the third louver 202 to rotate, and the adjustment structure 403 rotates along with the first louver 101 and the third louver 202 via the connecting unit 3. At the same time, an external force drives the rotating structure 404 to rotate, causing the two adjustment structures 403 to move closer to or further away from each other, so that the distance between the two adjustment structures 403 can match the interval between the first louver 101 and the third louver 202.

[0072] Subsequently, once the rotation angles of the first louver 101 and the third louver 202 are determined, since the length of the rotating structure 404 between the two adjusting structures 403 remains unchanged, even if the first louver 101 or the third louver 202 is accidentally touched, the first louver 101 or the third louver 202 will tend to rotate, affecting the distance between the first louver 101 and the third louver 202 along the axial direction of the rotating structure 404. Since the position of the rotating structure 404 remains unchanged, the distance between the first louver 101 and the third louver 202 can be limited, thereby achieving the technical effect of improving the limitation of the rotation angles of the first louver 101 and the third louver 202.

[0073] Preferably, the connecting unit 3 is provided with a second mounting groove, and the adjusting structure 403 is provided with a fixing rod, which is connected to the inner wall of the second mounting groove. Based on this, the connection between the adjusting structure 403 and the connecting unit 3 can be realized, so that the adjusting structure 403 moves along the axis of the rotating structure 404, thereby driving the movement of the connecting unit 3. At the same time, the connecting unit 3 moves the adjusting structure 403 and the rotating structure 404 in position as the blades rotate.

[0074] Of course, in other embodiments, the connecting unit 3 may not have a second mounting groove, but may have a protrusion, with the adjusting structure 403 directly connected to the protrusion. In other embodiments, the rotating structure 404 may have the same thread along its axial direction.

[0075] According to an embodiment of the present invention, in another aspect, a louvered damper is also provided, comprising: Door frame; At least two blades, including a first blade 1 and a second blade 2 that are arranged adjacently and stacked, with a portion of the first blade 1 stacked on top of the second blade 2, and each blade is hinged to the door frame; Rotating unit 5 is located inside each blade so that the blade is hinged to the door frame; A drive unit, connected to the rotation unit 5, is used to drive the rotation of each rotation unit 5; The limiting device in this embodiment is connected to the first blade 1 and / or fixedly connected to the second blade 2.

[0076] The number of blades is not limited. The rotating unit 5 is a rotating shaft. The hinge between the blade and the door frame is realized through the rotating shaft, which can improve the technical effect of the ease of hinge connection.

[0077] Furthermore, the drive unit is a mature technology, namely a linkage structure. In this embodiment, no adjustments were made to the structure of the louver damper except for the limiting device. Therefore, the specific structures of the door frame, blades, rotating unit 5 and drive unit will not be described in detail.

[0078] As a possible implementation, the rotating unit 5 can be a rod-shaped structure.

[0079] In addition, combined Figure 1 As shown, in this embodiment, the limiting device is connected to one of the multiple blades, and the limiting device supports the blade adjacent to that blade, that is, the blade is the first blade 1, and the blade adjacent to that blade is the second blade 2.

[0080] Of course, in other embodiments, depending on the design of the louvered damper, each blade may be equipped with a limiting device. Compared to other embodiments, this embodiment improves the simplicity of the louvered damper structure by providing a limiting device, thereby achieving the technical effect of cost saving.

[0081] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A limiting device, characterized in that, The limiting device, used to limit the rotation angle of each blade, includes: The connecting unit (3) is fixedly connected to the first louver (101) of the first blade (1) so that when the opening of the first louver (101) is adjusted, the connecting unit (3) limits the rotation angle of each blade, and / or the connecting unit (3) is fixedly connected to the first louver (101) and to the third louver (202) of the second blade (2) so that when the opening of the first blade (1) and the second blade (2) is adjusted, the connecting unit (3) limits the rotation angle of each blade; The support unit (4) is connected to the connecting unit (3), and the support unit (4) has a first relaxed state and a second state that defines the opening of each of the blades.

2. The limiting device according to claim 1, characterized in that, The connection unit (3) includes: The connecting structure (301) is provided with a first mounting groove (302), which contains one end of the second louver (201) of the first louver (101) near the second blade (2), and / or contains one end of the third louver (202) away from the first louver (101).

3. The limiting device according to claim 2, characterized in that, The first louver (101) is detachably connected to the connecting structure (301), and / or the third louver (202) is detachably connected to the connecting structure (301).

4. The limiting device according to claim 3, characterized in that, The connecting structure (301) is provided with a first threaded hole communicating with the first mounting groove (302), and the connecting unit (3) includes: The abutting structure (303) is threadedly connected to the first threaded hole, and the abutting structure (303) abuts against the first louver (101) and / or the abutting structure (303) abuts against the third louver (202).

5. The limiting device according to any one of claims 2-4, characterized in that, When the opening of the first louver (101) is reduced, and the limiting device limits the rotation angle of each of the blades; the support unit (4) includes: The support structure (401) is slidably connected to the connecting unit (3). The support structure (401) has a first state in which it is separated from the second louver (201) and a second state in which it abuts against the surface of the second louver (201).

6. The limiting device according to claim 5, characterized in that, The support structure (401) is threadedly connected to the connecting unit (3).

7. The limiting device according to any one of claims 2-4, characterized in that, When the opening of the first louver (101) and the third louver (202) is increased, the limiting device is used to limit the rotation angle of each blade. The connecting unit (3) is provided in at least two parts, at least one of the connecting units (3) is fixedly connected to the first louver (101), and at least one of the connecting units (3) is fixedly connected to the third louver (202).

8. The limiting device according to claim 7, characterized in that, The support unit (4) includes: The adjustment structure (403) has at least two parts, and is connected to the connection unit (3) one by one; A rotating structure (404) is threadedly connected to at least two of the adjusting structures (403), and the threads of the rotating structure (404) are opposite in their axial direction, such that at least two of the rotating structures (404) move closer to or further away from each other along the axial straight line of the adjusting structure (403), and the position between the second louver (201) and the third louver (202) is defined by the distance between adjacent rotating structures (404).

9. The limiting device according to claim 8, characterized in that, The connecting unit (3) is provided with a second mounting groove, and the adjusting structure (403) is provided with a fixing rod, which is connected to the inner wall of the second mounting groove.

10. A louvered damper, characterized in that, include: Door frame; At least two blades, including a first blade (1) and a second blade (2) arranged adjacent to each other and stacked, with a portion of the first blade (1) stacked on top of the second blade (2), and each blade is hinged to the door frame; A rotating unit (5) is provided inside each of the blades so that the blades are hinged to the door frame; A drive unit is connected to the rotating unit (5) and is used to drive the rotation of each of the rotating units (5); The limiting device according to claims 1-9 is connected to the first blade (1) and / or fixedly connected to the second blade (2).

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