A duct air volume regulating device

Abstract

The duct air volume regulating device of the present invention comprises an upper panel, a lower panel, a conical cylinder and a cylindrical support rod; there are more than three support rods, all of which are fixed on the upper panel and the lower panel and are evenly arranged around the conical cylinder; the top of the conical cylinder is open and fixed with a panel, the middle of the panel is opened and fixed with a mounting base, a worm gear screw lift is mounted on the mounting base, the worm gear screw lift comprises a worm wheel and a screw connected by gears, the upper end of the screw is fixed on the upper panel, the lower end of the screw extends into the conical cylinder, a worm wheel is mounted on the screw, and one end of the worm wheel is connected to a motor; the mounting base is equipped with roller brackets with the same number of support rods, the roller brackets are equipped with rollers, the rollers move up and down along the support rods, the lower panel is opened with a large hole, and the lower part of the conical cylinder moves up and down in the large hole driven by the motor. The present invention can accurately adjust the inner area of ​​the fan inlet and outlet ducts, is easy to operate, and is safe to operate.

Description

Technical Field

[0001] The invention belongs to the field of air volume regulating devices, and in particular relates to a pipeline air volume regulating device. Background Art

[0002] In the existing fan performance test process, the adjustment of the pipeline ventilation area has long been manually controlled by using a regular flat plate blocking method at the inlet section. This has some problems, such as inaccurate adjustment of the area inside the fan pipeline, excessive fan starting power and current, high labor intensity, and low operating safety. Summary of the invention

[0003] The present invention aims at the deficiencies of the prior art and provides a duct air volume adjustment device to solve the problems of inaccurate adjustment of the inner area of ​​the fan duct during the existing test, high labor intensity and operational safety. The effective implementation of the present invention can accurately adjust the inner area of ​​the fan duct, start the fan with low power and low current, and is easy to operate and safe to operate.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a duct air volume regulating device, comprising an upper panel, a lower panel, a conical cylinder and a cylindrical support rod; there are more than three support rods, all of which are fixed on the upper panel and the lower panel and are evenly arranged around the conical cylinder; the top of the conical cylinder is open and a panel is fixed, the middle of the panel is opened and a mounting base is fixed, a worm gear screw lift is installed on the mounting base, the worm gear screw lift includes a worm wheel and a screw connected by gears, the upper end of the screw is fixed on the upper panel, the lower end of the screw extends into the conical cylinder, a worm wheel is installed on the screw, one end of the worm wheel is connected to a motor, and the motor is fixed on the panel; the panel is equipped with a roller bracket with the same number as the support rods, the roller bracket is equipped with a roller, and the roller moves up and down along the support rod; a large hole is opened on the lower panel, and the lower part of the conical cylinder moves up and down in the large hole driven by the motor.

[0005] The present invention is further configured such that the conical cylinder comprises an outer cone and an inner cylinder, the lower end of the screw rod extends into the inner cylinder, the outer cone is a mesh plate, and sound-absorbing cotton is filled between the outer cone and the inner cylinder.

[0006] The present invention is further configured such that the tip of the outer cone is covered and fixed with a cold plate.

[0007] The present invention is further configured such that a reinforcing rod is connected between the outer cone and the inner cylinder.

[0008] The present invention is further configured such that a first limit switch is fixed to the lower portion of the support rod, and the conical cylinder moves downward until it touches the first limit switch.

[0009] The present invention is further configured such that a limit plate is fixed on one side of the panel, a second limit switch is fixed on the upper portion of the support rod, and the conical cylinder moves upward until the limit plate touches the second limit switch.

[0010] The present invention is further configured such that a rubber sealing plate is fixed on the lower panel near the large hole, and the inner side surface of the rubber sealing plate has the same inclination as the outer side surface of the conical cylinder.

[0011] The present invention is further configured such that the ends of the support rods are locked on the upper panel and the lower panel by nuts.

[0012] The present invention is further configured such that a flange is fixed on the upper panel, and a small hole for fixing the upper end of the screw rod is opened in the middle of the flange.

[0013] The present invention is further configured such that the roller bracket comprises two parallel side panels, the side panels are provided with mounting holes, a rotating shaft is installed through the mounting holes, the roller is installed on the rotating shaft on the inner side of the side panels, a bearing is installed between the rotating shaft and the roller, and a nut is screwed on the rotating shaft on the outer side of the side panels to fix it to the side panels.

[0014] The present invention is further configured such that the outer side surface of the roller is V-shaped or U-shaped and can be clamped on the support rod.

[0015] In summary, the present invention has the following beneficial effects:

[0016] (1) The present invention can effectively improve the regulating effect of the duct air volume, while reducing the problem of excessive applicable power caused by excessive air resistance when opening and closing.

[0017] (2) The rubber sealing plate is provided to increase the sealing performance and prevent the gas in the pipeline from leaking out. The structure is simple and the operation is convenient.

[0018] (3) The first limit switch and the second limit switch are set to accurately limit the travel range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the side panel;

[0021] Figure 3 It is a schematic diagram of the connection structure between the roller and the roller bracket;

[0022] Figure 4 is a schematic diagram of the structure of the roller;

[0023] Figure 5 A schematic diagram of the structure of the installation base.

[0024] Among them, 1. upper panel; 2. lower panel; 3. nut; 4. support rod; 5. roller; 6. roller bracket; 7. mounting base; 8. panel; 9. worm gear screw lift; 10. motor; 11. rubber sealing plate; 12. first limit switch; 13. second limit switch; 14. limit plate; 15. screw; 16. large hole; 17. flange; 18. outer cone; 19. inner cylinder; 20. sound-absorbing cotton; 21. cold plate; 22. reinforcement rod; 23. side panel; 24. mounting hole; 25. rotating shaft; 26. bearing; 27. through hole; 28. notch. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a duct air volume regulating device, which is used for air volume regulation, for example, in a fan performance test, to regulate the ventilation area of ​​a fan duct. Figure 1 The duct air volume regulating device comprises an upper panel 1, a lower panel 2, a conical cylinder and a cylindrical support rod 4. There are more than three support rods 4, all of which are fixed on the upper panel 1 and the lower panel 2. Figure 1There are 4 of them, which can be fixed by nuts 3 and evenly arranged around the conical cylinder. The top of the conical cylinder is open and fixed with a panel 8. A hole is opened in the middle of the panel 8 and a mounting base 7 is fixed. A worm screw lift 9 is installed on the mounting base 7. The worm screw lift 9 includes a worm wheel and a screw 15 connected by gears. The upper end of the screw 15 is fixed on the upper panel 1, and the lower end of the screw 15 extends into the conical cylinder. The screw 15 is equipped with a worm wheel. One end of the worm wheel is connected to the motor 10. The motor 10 is fixed on the motor pad. There are screw holes on the motor pad. The motor pad is fixed on the panel 8 at the large end of the conical cylinder. The motor 10 is started to drive the worm screw lift 9 to move up and down by means of the roller 5. The panel 8 is equipped with roller brackets 6 with the same number as the support rod 4. The roller brackets 6 are equipped with rollers 5, and the rollers 5 move up and down along the support rod 4. The lower panel 2 is provided with a large hole 16, and the lower part of the conical cylinder moves up and down in the large hole 16 driven by the motor 10. The present invention can effectively improve the regulation of the air volume of the duct, and at the same time reduce the problem of excessive applicable power caused by excessive air resistance when opening and closing.

[0027] As an implementation method, the conical cylinder is a sealed cylinder, but the incoming air will make a large noise on the cylinder. As another better choice, the conical cylinder includes an outer cone 18 and an inner cylinder 19, the lower end of the screw 15 extends into the inner cylinder 19, the outer cone 18 is a mesh plate, and the space between the outer cone 18 and the inner cylinder 19 is filled with silencer cotton 20, which can greatly reduce noise. The inner cylinder 19 is set to be hollow, which can reduce weight, save materials, and provide telescopic space for the screw 15.

[0028] Since there is dust abrasion when the gas passes through, the tip of the outer cone 18 is covered with a fixed cold plate 21 to play a role in thickening and strengthening.

[0029] In order to further enhance the positioning and support between the outer cone 18 and the inner cylinder 19, a reinforcing rod 22, such as round steel or flat steel, is connected between the outer cone 18 and the inner cylinder 19. The reinforcing rod 22 is not limited in direction and can be connected horizontally or inclined.

[0030] See also Figure 2 and Figure 3 The roller bracket 6 includes two parallel side plates 23, each of which has a mounting hole 24, through which a rotating shaft 25 is mounted, and the roller 5 is mounted on the rotating shaft 25 on the inner side of the side plate 23, and a bearing 26 is mounted between the rotating shaft 25 and the roller 5, and a nut is screwed on the rotating shaft 25 on the outer side of the side plate 23 to fix it on the side plate 23. Figure 4 The outer side surface of the roller 5 is V-shaped or U-shaped, which can be clamped on the support rod 4, and can guide and limit.

[0031] A first limit switch 12 is fixed to the lower part of the support rod 4, and the conical cylinder moves downward until it touches the first limit switch 12. The first limit switch 12 limits the maximum limit of the downward movement of the conical cylinder.

[0032] A limit plate 14 is fixed on one side of the panel, and a second limit switch 13 is fixed on the upper part of the support rod 4. The conical cylinder moves upward until the limit plate 14 touches the second limit switch 13. The second limit switch 13 limits the maximum limit of the upward movement of the conical cylinder. When the first limit switch 12 and the second limit switch 13 are used in conjunction, the travel range of the conical cylinder is limited.

[0033] A rubber sealing plate 11 is fixed on the lower panel 2 near the large hole 16, and the inner side of the rubber sealing plate 11 has the same inclination as the outer side of the conical cylinder. When the conical cylinder is lowered to the lowest point, that is, the pipeline is closed, the outer wall of the conical cylinder touches the edge of the large hole 16, which can increase the sealing and prevent the gas in the pipeline from overflowing. The structure is simple and the operation is convenient.

[0034] Furthermore, a flange 17 is fixed on the upper panel 1 , and a small hole for fixing the upper end of the screw rod 15 is opened in the middle of the flange 17 .

[0035] See also Figure 5 The mounting base 7 includes a small disc on the top and a large disc on the bottom, with a sleeve in the middle. A through hole 27 for mounting a worm gear screw lift 9 is opened in the middle of the sleeve, and a notch 28 is provided on the bottom edge of the large disc for pressing on the panel 8.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A duct air volume regulating device, characterized in that: It comprises an upper panel, a lower panel, a conical cylinder and a cylindrical support rod; there are more than three support rods, all of which are fixed on the upper panel and the lower panel and are evenly arranged around the conical cylinder; the top of the conical cylinder is open and a panel is fixed thereto, the middle of the panel is opened and a mounting base is fixed thereto, a worm gear screw lift is mounted on the mounting base, the worm gear screw lift comprises a worm wheel and a screw connected by gears, the upper end of the screw rod is fixed on the upper panel, the lower end of the screw rod extends into the conical cylinder, a worm wheel is mounted on the screw rod, one end of the worm wheel is connected to a motor, and the motor is fixed on the panel; the panel is equipped with roller brackets with the same number as the support rods, the roller brackets are equipped with rollers, and the rollers move up and down along the support rods; a large hole is opened on the lower panel, and the lower part of the conical cylinder moves up and down in the large hole driven by the motor; A first limit switch is fixed to the lower part of the support rod, and the conical cylinder moves downward until it touches the first limit switch; a limit plate is fixed to one side of the panel, and a second limit switch is fixed to the upper part of the support rod, and the conical cylinder moves upward until the limit plate touches the second limit switch.

2. The duct air volume regulating device according to claim 1, characterized in that: The conical cylinder comprises an outer cone and an inner cylinder, the lower end of the screw rod extends into the inner cylinder, the outer cone is a mesh plate, and sound-absorbing cotton is filled between the outer cone and the inner cylinder.

3. The duct air volume regulating device according to claim 2, characterized in that: The tip of the outer cone is covered and fixed with a cold plate.

4. The duct air volume regulating device according to claim 2, characterized in that: A reinforcing rod is connected between the outer cone and the inner cylinder.

5. The duct air volume regulating device according to claim 1, characterized in that: A rubber sealing plate is fixed on the lower panel near the large hole, and the inner side surface of the rubber sealing plate has the same inclination as the outer side surface of the conical cylinder.

6. The duct air volume regulating device according to claim 1, characterized in that: A flange is fixed on the upper panel, and a small hole for fixing the upper end of the screw rod is opened in the middle of the flange.

7. The duct air volume regulating device according to claim 1, characterized in that: The roller bracket includes two parallel side plates, each of which has a mounting hole, through which a rotating shaft is installed, and the roller is installed on the rotating shaft on the inner side of the side plate, a bearing is installed between the rotating shaft and the roller, and a nut is screwed on the rotating shaft on the outer side of the side plate to be fixed to the side plate.

8. The duct air volume regulating device according to claim 1 or 5, characterized in that: The outer side surface of the roller is V-shaped or U-shaped and can be clamped on the support rod.

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