Air volume adjusting door of fan

Abstract

The utility model discloses an air volume adjusting door of a fan, and relates to the technical field of air volume adjusting devices. The structure comprises a valve body, a shaft, a blade, a sealing rubber ring, a driving handle, a positioning device, a blade outer rubber sleeve and a connecting pressing plate; the blade is of a circular plate structure, and the outer diameter of the blade is smaller than the minimum inner diameter of the sealing rubber ring; the outer diameter of the blade outer rubber sleeve is larger than the minimum inner diameter of the sealing rubber ring. The inner wall of the middle part of the valve body is provided with an annular groove part for placing a sealing rubber ring; two round sleeves matched with the shaft are fixed to the outer wall of the annular groove part of the valve body in an axial symmetry penetrating mode. A rectangular through hole perpendicular to the axis of the shaft is formed in the portion, located in the valve body, of the shaft, and the height of the rectangular through hole is the same as the outer diameter of the blade. According to the utility model, innovation and optimization are carried out in multiple aspects, especially improvement is carried out in the aspects of sealing, maintenance and operation convenience, so that higher reliability, lower maintenance cost and lower technical efficiency are realized; the design is very suitable for application scenes needing frequent air volume adjustment and strict sealing.

Description

Technical Field

[0001] This utility model belongs to the technical field of air volume regulation devices, and in particular relates to a fan air volume regulation gate. Background Technology

[0002] In industrial ventilation, air conditioning, and building environmental control systems, fan airflow regulating dampers play a crucial role. They are primarily used to regulate airflow, ensuring system efficiency and stability. However, existing fan airflow regulating damper designs have several significant problems that limit their performance and application range. **Inconvenient Maintenance:** Traditional fan airflow regulating dampers typically employ complex sealing structures and connection methods, making replacement difficult when components age or fail. This not only increases maintenance time and costs but can also lead to prolonged equipment downtime, impacting production efficiency. **Poor Sealing Performance:** In many existing designs, there is direct contact between the sealing ring and the outer rubber sleeve of the blades. Over time, this can lead to wear and deformation, resulting in decreased sealing performance. This causes air leakage and energy loss, reducing the overall efficiency of the system. **Complex Operation:** The operating mechanisms of some fan airflow regulating dampers are overly complex, requiring specialized skills for proper installation and maintenance. This complexity not only increases operator training costs but can also lead to misoperation, further affecting the normal operation of the equipment. **High Maintenance Difficulty:** Replacing certain critical components often requires disassembling the entire blade, making the maintenance process cumbersome and time-consuming. In addition, frequent disassembly and reassembly may cause additional damage to other components.

[0003] In view of the above problems, there is an urgent need for an improved fan airflow regulating gate design to address the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to provide a fan air volume regulating door, which solves the problems of inconvenient maintenance and poor sealing effect in the prior art by optimizing the sealing structure and materials, simplifying the maintenance process and enhancing the ease of operation.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a fan airflow regulating gate, comprising a valve body, a shaft, blades, a sealing ring, a drive handle, a positioning device, blade outer sleeves, and a connecting pressure plate. The blades are circular plate structures, with an outer diameter smaller than the minimum inner diameter of the sealing ring. The outer diameter of the blade outer sleeve is larger than the minimum inner diameter of the sealing ring. The valve body has a circular groove on its inner wall for placing the sealing ring. Two circular sleeves symmetrically connected to the shaft are fixed through the outer wall of the circular groove. A rectangular through hole perpendicular to the shaft axis is formed in the portion of the shaft within the valve body, and the height of the rectangular through hole is the same as the outer diameter of the blades. A blade outer sleeve is inserted into the portion of the blades protruding from both sides of the shaft, and the two blade outer sleeves, the shaft, and the blades are connected as a single unit by two connecting pressure plates and two rows of bolts and nuts. A rectangular column head is provided at the upper end of the shaft. The drive handle is mounted on the rectangular column head. The drive handle is connected and positioned to the valve body by the positioning device.

[0007] As a preferred embodiment of this utility model, a sector-shaped plate is fixed to the outer wall of the outer end of one of the circular sleeves; the sector-shaped plate has an arc hole with a quarter-circle.

[0008] As a preferred embodiment of this utility model, the sealing ring has a first circular through hole that passes through its center and is sealed to fit the shaft; the sealing ring includes a rubber ring that fits into the circular groove; two semi-circular rubber ring portions are integrally formed on the inner arc surfaces at both ends of the rubber ring; an arched rubber ring portion is integrally formed between the vertices of the two semi-circular rubber ring portions; the arched rubber ring portion, the two semi-circular rubber ring portions, and the rubber ring together form a sealing cavity.

[0009] As a preferred embodiment of this utility model, a number of iron plates are embedded and fixed on the outer ring surface of the rubber ring; the iron plates are provided with internal threaded holes; the outer wall of the circular groove is provided with a second round through hole of the same number as the iron plates; the valve body and the sealing ring are connected and fixed by countersunk bolts.

[0010] As a preferred embodiment of this utility model, the drive handle includes a rectangular sleeve that connects and mates with the rectangular column head; a handle rod is fixed to one side wall of the rectangular sleeve; a single ear plate is fixed to the lower end of the rectangular sleeve opposite to the other side wall; the positioning device includes a bolt and a nut; the bolt passes through the arc hole and the single ear plate in sequence and is then threadedly connected to the nut.

[0011] As a preferred embodiment of this utility model, the blade is provided with two rows of third through holes symmetrically arranged on its axis, which mate with the bolts and nuts; the outer rubber sleeve of the blade is a semi-circular disc-shaped rubber sleeve, and the open end of the rubber sleeve has an arc surface that mates with the outer wall of the shaft; the outer circular surface of the outer rubber sleeve of the blade is an arc surface; the outer diameter of the outer rubber sleeve of the blade is smaller than the inner diameter of the arched rubber ring; the outer diameter of the outer rubber sleeve of the blade is larger than the inner diameter of the arched rubber ring; the outer rubber sleeve of the blade is provided with a row of fourth through holes that mate with the row of third through holes on the blade; the connecting pressure plate includes a rectangular plate; the middle of the rectangular plate is provided with an arched portion that mates with the outer wall of the shaft; the rectangular plate is provided with two rows of fifth through holes that mate with the two rows of third through holes on the blade.

[0012] As a preferred technical solution of this utility model, the surface of the fan-shaped plate is provided with an angle scale line centered on the axis of the circular sleeve along one end of the arc hole to the other end; the end of the single ear plate is provided with a pointer pointing to the angle scale line.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model allows for quick replacement of the sealing ring and blade outer sleeve through simple disassembly, significantly reducing maintenance time and costs. It reduces the time and labor costs associated with frequent replacements due to component aging or damage, improving the durability and availability of the equipment.

[0015] 2. This utility model's sealing ring utilizes an arched structure for sealing, effectively avoiding leakage problems that may occur in traditional designs due to direct contact between the sealing ring and the outer rubber sleeve of the blade. Improved airtightness reduces airflow noise and energy loss, making it particularly suitable for applications requiring strict sealing.

[0016] 3. The design of the drive handle and positioning device of this utility model is simple and intuitive. The combination structure of the handle rod and the single ear plate is easy to operate and position, and installation and maintenance can be completed without complicated tools.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the structure of the fan air volume regulating door of this utility model.

[0020] Figure 2 This is a front view of the fan airflow regulating door of this utility model.

[0021] Figure 3 This is a schematic diagram of the valve body.

[0022] Figure 4 This is a schematic diagram of the shaft and blades.

[0023] Figure 5 This is a schematic diagram of the sealing ring.

[0024] Figure 6 This is a schematic diagram of the cross-section of the sealing ring.

[0025] Figure 7 This is a schematic diagram of the drive handle.

[0026] Figure 8 This is a schematic diagram of the outer rubber sleeve of the blade.

[0027] Figure 9 This is a schematic diagram of the structure connecting the pressure plate.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1-Valve body, 2-Shaft, 3-Blade, 4-Sealing ring, 5-Drive handle, 6-Positioning device, 7-Blade outer sleeve, 8-Connecting pressure plate, 9-Counterhead bolt, 11-Circular groove, 12-Circular sleeve, 13-Fan-shaped plate, 14-Arc hole, 15-Second circular through hole, 21-Rectangular through hole, 22-Rectangular column head, 31-Third circular through hole, 41-First circular through hole, 42-Rubber ring, 43-Semi-circular rubber ring, 44-Arched rubber ring, 45-Sealing cavity, 46-Iron plate, 47-Internal threaded hole, 51-Rectangular sleeve, 52-Handle rod, 53-Single ear plate, 54-Pointer, 61-Bolt, 62-Nut, 71-Blade outer sleeve, 81-Rectangular plate, 82-Circular arch, 83-Fifth circular through hole. Detailed Implementation

[0030] 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 scope of protection of the present utility model. Specific Implementation Example 1:

[0032] Please see Figure 1-9As shown, this utility model is a fan airflow regulating gate, including a valve body 1, a shaft 2, blades 3, a sealing ring 4, a drive handle 5, a positioning device 6, blade outer sleeves 7, and a connecting pressure plate 8. The blades 3 are circular plate structures, with an outer diameter smaller than the minimum inner diameter of the sealing ring 4. The outer diameter of the blade outer sleeve 7 is larger than the minimum inner diameter of the sealing ring 4. The inner wall of the valve body 1 has a circular groove 11 for placing the sealing ring 4. Two circular sleeves 12, which mate with the shaft 2, are symmetrically fixed through the outer wall of the circular groove 11 of the valve body 1. The portion of the shaft 2 located inside the valve body 1 has a rectangular through hole 21 perpendicular to the axis of the shaft 2, and the height of the rectangular through hole 21 is the same as the outer diameter of the blades 3. A blade outer sleeve 7 is inserted into the portion of the blades 3 protruding from both sides of the shaft 2, and the two blade outer sleeves 7, the shaft 2, and the blades 3 are connected as a whole by two connecting pressure plates 8 and two rows of bolts and nuts. A rectangular column head 22 is provided at the upper end of the shaft 2. The drive handle 5 is mounted on the rectangular column head 22. The drive handle 5 is connected and positioned to the valve body 1 via a positioning device 6. The blades 3 of the fan airflow regulating damper, used to adjust the opening angle and airflow, are fitted with blade outer sleeves 7. The turbulence and eddies generated on the surface of the blades 3 are absorbed and dissipated by the blade outer sleeves 7, reducing the generation of turbulence and eddies, thereby reducing airflow noise.

[0033] This invention disassembles the fan airflow regulating gate into independent parts such as valve body 1, shaft 2, blades 3, sealing ring 4, drive handle 5, positioning device 6, blade outer rubber sleeve 7, and connecting pressure plate 8. The easily damaged sealing ring 4 and blade outer rubber sleeve 7 can be quickly replaced. Replacing the blade outer rubber sleeve 7 only requires removing the connecting pressure plate 8, resulting in high component replacement efficiency. In the entire structure, no bearing is needed between the valve body 1 and shaft 2; the tight fit between the sealing ring 4 and shaft 2 provides a structural seal, preventing air leakage between the valve body 1 and shaft 2.

[0034] One of the circular sleeves 12 has a sector-shaped plate 13 fixed to its outer wall at the outer end. The sector-shaped plate 13 has a quarter-circular arc hole 14. To facilitate understanding the rotation angle of the blade 3, the surface of the sector-shaped plate 13 has an angle scale line centered on the axis of the circular sleeve 12, extending from one end of the arc hole 14 to the other. The angle scale line ranges from 0° to 90°. A pointer 54 pointing to the angle scale line is provided at the end of the single ear plate 53.

[0035] The sealing ring 4 has a first through hole 41 that passes through its center and seals with the shaft 2. The sealing ring 4 includes a rubber ring 42 that mates with the annular groove 11. Two semi-circular rubber ring portions 43 are integrally formed on the inner arc surfaces at both ends of the rubber ring 42. An arched rubber ring portion 44 is integrally formed between the apexes of the two semi-circular rubber ring portions 43. The arched rubber ring portion 44, the two semi-circular rubber ring portions 43, and the rubber ring 42 form a sealing cavity 45. The outer rubber sleeve 7 of the blade compresses the arched rubber ring portion 44 of the sealing ring 4, deforming the sealing cavity 45 and increasing the pressure between the sealing ring 4 and the outer rubber sleeve 7 of the blade, achieving a good sealing effect. Both the outer rubber sleeve 7 and the sealing ring 4 are made of rubber; their softness and wear resistance reduce direct contact and friction between the blade 3 and other components, reducing wear, maintaining the blade in good working condition, and reducing the frequency of maintenance and replacement.

[0036] To improve the firmness of the sealing ring 4 on the valve body 1, several iron plates 46 are embedded and fixed on the outer ring surface of the rubber ring 42. The iron plates 46 have internally threaded holes 47. The outer wall of the annular groove 11 has the same number of second through holes 15 as the iron plates 46. The valve body 1 and the sealing ring 4 are connected and fixed by countersunk bolts 9.

[0037] The drive handle 5 includes a rectangular sleeve 51 that connects and mates with the rectangular column head 22. A handle rod 52 is fixed to one side wall of the rectangular sleeve 51. A single lug 53 is fixed to the lower end of the opposite side wall of the rectangular sleeve 51. The positioning device 6 includes a bolt 61 and a nut 62. The bolt 61 passes through the arc hole 14 and the single lug 53 in sequence and is then threadedly connected to the nut 62.

[0038] The blade 3 has two rows of third through holes 31 symmetrically arranged on its axis, which mate with bolts and nuts. The outer rubber sleeve 7 of the blade is a semi-circular disc-shaped rubber sleeve, and the open end of the rubber sleeve has an arc surface that mates with the outer wall of the shaft 2. The outer circular surface of the outer rubber sleeve 7 is an arc surface. The outer diameter of the outer rubber sleeve 7 is smaller than the inner diameter of the arched rubber ring 44. The outer diameter of the outer rubber sleeve 7 is larger than the inner diameter of the arched rubber ring 44. The outer rubber sleeve 7 has a row of fourth through holes 71 that mate with the row of third through holes 31 on the blade 3. The connecting pressure plate 8 includes a rectangular plate 81. The rectangular plate 81 has an arched part 82 in the middle that mates with the outer wall of the shaft 2. The rectangular plate 81 has two rows of fifth through holes 83 that mate with the two rows of third through holes 31 on the blade 3. The connection and assembly of the blade 3 with the shaft 2, the outer rubber sleeve 7 of the blade, and the connecting pressure plate 8 is quick and convenient, and also facilitates the replacement of the outer rubber sleeve 7 of the blade during later maintenance.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fan air volume regulating door, characterized in that: it comprises a valve body (1), a shaft (2), a blade (3), a sealing rubber ring (4), a driving handle (5), a positioning device (6), a blade outer rubber sleeve (7), and a connecting pressing plate (8); the blade (3) is a circular plate body structure, the outer diameter of the blade (3) is smaller than the minimum inner diameter of the sealing rubber ring (4); the outer diameter of the blade outer rubber sleeve (7) is greater than the minimum inner diameter of the sealing rubber ring (4); a circular groove part (11) for placing the sealing rubber ring (4) is arranged on the inner wall of the middle part of the valve body (1); two circular sleeves (12) matched with the shaft (2) are fixed on the outer wall of the circular groove part (11) of the valve body (1) in an axis-symmetrical manner; a rectangular through hole (21) perpendicular to the axis of the shaft (2) is arranged on the part of the shaft (2) located in the valve body (1), and the height of the rectangular through hole (21) is the same as the outer diameter of the blade (3); the parts of the blade (3) exposed on both sides of the shaft (2) are respectively inserted and installed with one blade outer rubber sleeve (7), and the two blade outer rubber sleeves (7), the shaft (2), and the blade (3) are connected into one body through two connecting pressing plates (8) and two rows of bolts and nuts; a rectangular head (22) is arranged on the upper end of the shaft (2); the driving handle (5) is installed on the rectangular head (22); the driving handle (5) and the valve body (1) are connected and positioned through the positioning device (6). the outer side end of one of the circular sleeves (12) is fixed with a sector plate (13); an arc hole (14) of a quarter circle is arranged on the sector plate (13).

2. The damper according to claim 1, wherein a first circular through hole (41) passing through the center of the sealing rubber ring (4) and matched with the shaft (2) is arranged on the sealing rubber ring (4); the sealing rubber ring (4) comprises a rubber ring (42) matched with the circular groove part (11); two semicircular rubber ring parts (43) are integrally formed on the inner arc surfaces of the two ends of the rubber ring (42); an arched rubber ring part (44) is integrally formed between the apexes of the two semicircular rubber ring parts (43); the arched rubber ring part (44) and the two semicircular rubber ring parts (43) and the rubber ring (42) form a sealing cavity (45).

3. The damper according to claim 1, wherein a plurality of iron plates (46) are inlaid and fixed on the outer ring surface of the rubber ring (42); an internal thread hole (47) is arranged on the iron plate (46); a second circular through hole (15) with the same number as the iron plates (46) is arranged on the outer wall of the circular groove part (11); the valve body (1) and the sealing rubber ring (4) are connected and fixed through a countersunk bolt (9).

4. The damper door of claim 3, wherein ​ 5. The damper according to claim 2, wherein The driving handle (5) comprises a rectangular sleeve (51) connected with the rectangular head (22); one side wall of the rectangular sleeve (51) is fixed with a handle rod (52); the other side wall of the rectangular sleeve (51) is fixed with a single-ear plate (53) at the lower end; the positioning device (6) comprises a bolt (61) and a nut (62); the bolt (61) is sequentially threaded through the arc hole (14) and the single-ear plate (53) and is screwed with the nut (62).

6. The damper door of claim 3, wherein, The vane (3) is symmetrically provided with two rows of third circular through holes (31) matched with the bolt nut; the vane outer rubber sleeve (7) is a semicircular cake-shaped rubber sleeve, and the opening end of the rubber sleeve is provided with an arc surface matched with the outer wall of the shaft (2); the outer circular surface of the vane outer rubber sleeve (7) is an arc surface; the outer diameter of the vane outer rubber sleeve (7) is smaller than the inner diameter of the arc-shaped rubber ring part (44); the outer diameter of the vane outer rubber sleeve (7) is greater than the inner diameter of the arc-shaped rubber ring part (44); the vane outer rubber sleeve (7) is provided with a row of fourth circular through holes (71) matched with a row of third circular through holes (31) on the vane (3); the connecting pressure plate (8) comprises a rectangular plate body (81); the middle part of the rectangular plate body (81) is provided with a circular arch part (82) matched with the outer wall of the shaft (2); the rectangular plate body (81) is provided with two rows of fifth circular through holes (83) matched with two rows of third circular through holes (31) on the vane (3).

7. The damper according to claim 5, wherein The surface of the sector plate (13) is provided with an angle scale line with the axis of the circular sleeve (12) as the center from one end of the arc hole (14) to the other end; the end of the single-ear plate (53) is provided with a pointer (54) pointing to the angle scale line.

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