Self-adaptive air volume valve

Abstract

The utility model discloses a self-adaptive air volume valve which comprises a hollow valve body, a plurality of fixing rods extending towards the axis of the valve body are fixedly arranged on the inner wall of the valve body, a shaft sleeve is fixedly connected to the close ends of the fixing rods, a main shaft is in threaded connection with the interior of the shaft sleeve, and the other side of the main shaft is connected with a fixing end. An adaptive block arranged on the circumferential face of the main shaft in a sliding mode is connected between the fixed end and the shaft sleeve, a self-adaptive spring is arranged between the adaptive block and the fixed end, a baffle is arranged on the inner wall of the valve body and arranged on the side, close to the fixed end, of the adaptive block, and an air passing hole is formed in the side portion of the baffle. According to the constant air volume valve, a new air volume balance mode is adopted, the actuating mechanism with the adaptive block and the self-adaptive spring is adopted, the structure of the valve body is simplified, the manufacturing cost of the constant air volume valve is reduced, and the application scene and the application range of the constant air volume valve are greatly expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of air volume valves, in particular to a self-adaptive air volume valve. Background Art

[0002] The constant air volume valve is a mechanical self-powered device suitable for ventilation and air conditioning systems that require constant air volume. The constant air volume valve does not require external power to control the air volume. It relies on the air flow force in the air duct to locate the control valve position, thereby maintaining the air flow at a preset flow rate within the entire pressure difference range.

[0003] Constant air volume valves are increasingly used in HVAC projects at home and abroad because they can automatically adjust the air volume passing through the air duct. Currently, mainstream manufacturers all use the cam + airbag constant air volume valve structure solution, but this solution has the disadvantages of a narrow application range and is not suitable for harsh working conditions such as high temperature, which limits some applications.

[0004] And because the constant air volume valve needs to be adjusted normally under higher wind speed conditions, the mainstream constant air volume valves on the market currently have a reduced valve body cross-section to increase the wind speed. The air duct needs to be necked when connected to the constant air volume valve, which takes up a large installation space and is inconvenient to use in many occasions. Utility Model Content

[0005] In order to solve the above problem, the utility model provides an adaptive air volume valve to solve the problem.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] An adaptive air volume valve comprises an internally hollow valve body, the inner wall of the valve body being fixedly provided with a plurality of fixing rods extending toward the axis of the valve body, a shaft sleeve being fixedly connected to one end close to the fixing rods, a main shaft being connected to the internal thread of the shaft sleeve, a fixed end being connected to the other side of the main shaft, an adaptation block being slidably provided on the circumferential surface of the main shaft being connected between the fixed end and the shaft sleeve, an adaptive spring being provided between the adaptation block and the fixed end, a baffle being provided on the inner wall of the valve body, the baffle being provided on a side of the adaptation block close to the fixed end, and an air hole being provided on the side of the baffle.

[0008] It is further configured as follows: a locking nut is threadedly connected to the external thread of the main shaft, and the locking nut is arranged on the outer end of the sleeve.

[0009] It is further configured as follows: a center hole is provided at the middle position of the adaptation block, and the adaptation block is sleeved on the main shaft through the center hole and is slidably connected thereto.

[0010] It is further configured that: a side surface of the adapting block close to the fixed end is configured as an arcuate spherical surface or a conical surface recessed toward the fixed end, and a side surface of the adapting block close to the sleeve is configured as an arcuate spherical surface or a conical surface recessed toward the sleeve.

[0011] It is further configured that: the aperture of the air hole is smaller than the outermost dimension of the adaptable block.

[0012] It is further configured that: flanges are provided on both side end surfaces of the valve body.

[0013] It is further configured that: the plurality of fixing rods are evenly distributed around the circumference of the axis of the valve body.

[0014] It is further configured as follows: the fixed end is configured as a circle, a rotation groove is opened on the circumferential surface of the fixed end, a bearing is rotatably arranged in the rotation groove, and two sliding rods symmetrically arranged and slidably connected to the valve body are fixed on the outer circumferential surface of the bearing.

[0015] It is further configured that: the inner wall of the valve body is horizontally provided with two sliding grooves which are symmetrically arranged and slidably connected to the two sliding rods.

[0016] It is further configured that: the adaptive spring is wound around the circumferential surface of the main shaft.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are:

[0018] 1. Dynamically balanced air volume: Through the combination of the adaptable block and the spring, the device can automatically adjust the air volume according to the static pressure in the air duct, achieve dynamic balance, and ensure stable air volume; the arc spherical or conical surface design of the adaptable block enables the device to adapt to different air volume changes and maintain the consistency of air volume; the actuator design of the adaptable block and the spring improves the durability of the device, and its high temperature and corrosion resistance characteristics enable it to adapt to a variety of environmental conditions, including high temperature and corrosive gases, extending its service life.

[0019] 2. Optimize the airflow path: The design of the internal baffle helps to optimize the airflow path, improve airflow efficiency and reduce energy loss. In addition, due to the setting of the baffle, there is no need to shrink the duct, which simplifies the installation process and reduces material and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is an elevation view of the utility model;

[0022] Figure 2 It is the AA cross-sectional view of the utility model;

[0023] Figure 3 It is the BB cross-sectional view of the utility model;

[0024] Figure 4 It is a schematic diagram of the main shaft of the utility model;

[0025] Figure 5 This is a schematic diagram of an application scenario of the utility model.

[0026] Figure numerals: 1, fixed end; 2, adaptive spring; 3, valve body; 4, locking nut; 5, baffle; 6, adaptation block; 7, main shaft; 8, fixed rod; 9, flange; 10, sleeve; 11, rotating groove; 12, bearing; 13, slide rod. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example

[0031] Reference Figure 1-Figure 5 , is an adaptive air volume valve disclosed in the utility model, comprising a valve body 3, the interior of the valve body 3 is hollow, a plurality of fixing rods 8 extending toward the axis of the valve body 3 are fixedly arranged on the inner wall of the valve body 3, and the plurality of fixing rods 8 are evenly distributed around the circumference of the axis of the valve body 3, and a shaft sleeve 10 is fixedly connected to one end of the plurality of fixing rods 8;

[0032] In this embodiment, three fixing rods 8 are provided, the sleeve 10 is a circular sleeve 10, and the three fixing rods 8 are connected to the valve body 3 and the circular sleeve 10 by welding.

[0033] A main shaft 7 is fitted inside the sleeve 10, and an external thread is provided on the circumferential surface of the main shaft 7 close to the sleeve 10. Furthermore, an internal thread matched with the external thread of the main shaft 7 is provided inside the sleeve 10, and a locking nut 4 is threadedly connected to the external thread of the main shaft 7, and the locking nut 4 is provided at the outer end of the sleeve 10; the use of the locking nut 4 ensures the fixation of the main shaft 7 and is used to prevent safety problems caused by loosening of the main shaft 7.

[0034] A fixed end 1 is installed at the end of the main shaft 7 away from the sleeve 10. The fixed end 1 is arranged in a circular shape. A rotation groove 11 is provided on the circumferential surface of the fixed end 1. A bearing 12 is rotatably provided in the rotation groove 11. Two symmetrically arranged sliding rods 13 are fixed on the outer circumferential surface of the bearing 12. Two symmetrically arranged sliding grooves slidably connected to the two sliding rods 13 are horizontally provided on the inner wall of the valve body 3. The setting of the sliding rod 13 supports the fixed end 1. By providing support to the main shaft 7 together with the sleeve 10, the shaking or vibration caused by fixing only one end can be reduced, which helps to maintain the stability of the main shaft 7.

[0035] An adaption block 6 is connected between the fixed end 1 and the sleeve 10 and is slidably arranged on the circumferential surface of the main shaft 7. A center hole is arranged in the middle of the adaption block 6. The adaption block 6 is sleeved on the main shaft 7 through the center hole and is slidably connected thereto.

[0036] In this embodiment, a side surface of the adaptation block 6 close to the fixed end 1 is set as an arcuate spherical surface or a conical surface recessed toward the fixed end 1, an adaptive spring 2 is arranged between the adaptation block 6 and the fixed end 1, and the adaptive spring 2 is wound around the circumferential surface of the main shaft 7; a side surface of the adaptation block 6 close to the sleeve 10 is set as an arcuate spherical surface or a conical surface recessed toward the sleeve 10.

[0037] Furthermore, a baffle 5 is provided on the inner wall of the valve body 3, and the baffle 5 is provided on the side of the adaptation block 6 close to the fixed end 1, and an air hole is provided on the side of the baffle 5, and the aperture of the air hole is smaller than the outermost dimension of the adaptation block 6;

[0038] Furthermore, flanges 9 are provided on both side end surfaces of the valve body 3 , and the provision of the flanges 9 facilitates the connection of both ends of the valve body 3 with the air duct.

[0039] The working principle and beneficial effects of the utility model are:

[0040] The utility model can realize the function of automatically adjusting the air volume, specifically, by rotating the fixed end 1 to rotate the main shaft 7, setting the initial distance between the baffle 5 and the adaptation block 6, and tightening the locking nut 4, at this time the air volume of the air valve is the preset air volume of the air valve, the pressure of the air flow acting on the adaptation block 6 will make the adaptive spring 2 maintain a suitable compression amount, the distance between the adaptation block 6 and the baffle 5 maintains the flow area, so that the air volume passing through the air hole of the baffle 5 is the preset value;

[0041] When the air volume is greater than the set value (static pressure is too high), the pressure of the airflow on the adaptation block 6 will increase, pushing the adaptation block 6 to one side of the adaptive spring 2, so that the compression of the adaptive spring 2 is greater than the previously set value. At the same time, the distance between the adaptation block 6 and the air outlet of the baffle 5 is reduced, the air flow area is reduced, the local resistance is increased, and the excessive static pressure is offset, so that the air volume behind the adaptation block 6 is maintained at the original set air volume.

[0042] When the air volume is less than the set value (static pressure is too small), the pressure of the airflow on the adaptation block 6 will decrease, and the adaptive spring 2 will push the adaptation block 6 to move to one side of the sleeve 10, while increasing the distance between the adaptation block 6 and the air outlet of the baffle 5, thereby increasing the air flow area, reducing local resistance, and compensating for the static pressure of the pipeline, thereby maintaining the originally set air volume.

[0043] The utility model adopts a new air volume balance mode, cancels the cam + airbag actuator, adopts the adaptive block 6 + adaptive spring 2 actuator, simplifies the valve body 3 structure, reduces the manufacturing cost of the constant air volume valve, and at the same time, the new air valve mechanism has high temperature resistance and corrosion resistance that are much higher than the traditional constant air volume valve of the cam + airbag structure, which greatly expands the application scene and application range of the constant air volume valve;

[0044] In addition, the baffle 5 provided inside the utility model can increase the air flow velocity, and the air duct does not need to be necked down during installation, and only the pipes of equal diameter need to be connected, which greatly reduces the requirements for installation space and reduces the workload of air duct manufacturing and installation.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An adaptive air volume valve, comprising a valve body (3) having a hollow interior, characterized in that: The inner wall of the valve body (3) is fixedly provided with a plurality of fixing rods (8) extending toward the axis of the valve body (3); a shaft sleeve (10) is fixedly connected to a proximal end of the plurality of fixing rods (8); the shaft sleeve (10) is internally threadedly connected to a main shaft (7); the other side of the main shaft (7) is connected to a fixing end (1); an adaption block (6) slidably provided on the circumferential surface of the main shaft (7) is connected between the fixing end (1) and the shaft sleeve (10); an adaptive spring (2) is provided between the adaption block (6) and the fixed end (1); a baffle (5) is provided on the inner wall of the valve body (3); the baffle (5) is provided on a side of the adaption block (6) close to the fixed end (1); and an air hole is provided on the side of the baffle (5).

2. The adaptive air volume valve according to claim 1, characterized in that: A locking nut (4) is threadedly connected to the external thread of the main shaft (7), and the locking nut (4) is arranged on the outer end of the shaft sleeve (10).

3. The adaptive air volume valve according to claim 1, characterized in that: A center hole is provided in the middle of the adapting block (6), and the adapting block (6) is sleeved on the main shaft (7) through the center hole and is slidably connected thereto.

4. The adaptive air volume valve according to claim 1, characterized in that: A side surface of the adapting block (6) close to the fixed end (1) is arranged as an arcuate spherical surface or a conical surface recessed toward the fixed end (1), and a side surface of the adapting block (6) close to the shaft sleeve (10) is arranged as an arcuate spherical surface or a conical surface recessed toward the shaft sleeve (10).

5. The adaptive air volume valve according to claim 4, characterized in that: The aperture of the air hole is smaller than the outermost dimension of the adaptable block (6).

6. The adaptive air volume valve according to claim 1, characterized in that: Flange plates (9) are provided on both side end surfaces of the valve body (3).

7. The adaptive air volume valve according to claim 1, characterized in that: The plurality of fixing rods (8) are evenly distributed around the circumference of the axis of the valve body (3).

8. The adaptive air volume valve according to claim 1, characterized in that: The fixed end (1) is arranged in a circular shape, a rotation groove (11) is provided on the circumferential surface of the fixed end (1), a bearing (12) is rotatably arranged in the rotation groove (11), and two sliding rods (13) symmetrically arranged and slidably connected to the valve body (3) are fixed on the outer circumferential surface of the bearing (12).

9. The adaptive air volume valve according to claim 8, characterized in that: The inner wall of the valve body (3) is horizontally provided with two sliding grooves which are symmetrically arranged and slidably connected to the two sliding rods (13).

10. The adaptive air volume valve according to claim 1, characterized in that: The adaptive spring (2) is wound around the circumferential surface of the main shaft (7).

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