Universal fan air volume measuring device

Abstract

The utility model relates to the technical field of general fan detection, and discloses a general fan air volume measuring device which comprises a rectifier box and an arranged air inlet pipe, and a connecting ring plate is installed at the outer end of the air inlet pipe. One side of the surface of each hollow cylinder is in threaded connection with a threaded ring, a side empty groove is formed in the center of the other side of the front face and the back face of each hollow cylinder, and a guide column is transversely inserted into an inner cavity of each hollow cylinder; the outer rod is hinged to the corresponding position of the surface of the guide column, the surface of the outer rod is sleeved with a reset spring, and the reset spring is attached to the inner wall of the hollow cylinder. According to the air volume measuring device for the universal fan, after a connecting ring plate is attached to a fan cover, the connecting ring plate is inserted into a hollow cylinder, a pressed guide column is released and is reset under the action of a reset spring, an outer rod is unfolded outwards through a side empty groove and is attached to the corresponding position of the surface of the fan cover, and then a threaded ring is rotated and is attached to the surface of the connecting ring plate. And quick disassembly and assembly operation is carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of universal fan detection, in particular to a universal fan air volume measuring device. Background Art

[0002] A general purpose fan is a fan with a wide range of applications. It can be used in various working conditions, including conveying air, gas, steam, hot air, etc. Compared with other types of fans, general purpose fans have a wider range of applications and are more commonly manufactured. General purpose fans can be customized according to different working conditions and usage requirements, and have high flexibility and adaptability. A fan is a general purpose machine for conveying gas with a wide variety of applications. It converts the mechanical energy of the prime mover into the energy of the conveyed fluid. In order to estimate the performance of a general purpose fan and the actual air volume and pressure, an air volume measuring device is required.

[0003] Common general fan air volume measuring devices are usually composed of structures such as pipelines, rectifiers, velocity-averaging tubes, differential pressure transmitters, and data acquisition and processing systems. After the end of the pipeline is connected to the fan cover of the fan, the airflow passes through the rectifier and is measured by the velocity-averaging tube. The differential pressure transmitter and the data acquisition and processing system convert the differential pressure signal into an electrical signal and convert it into readable air volume data. This is the common structure and use of general fan air volume measuring devices. When the traditional general fan air volume measuring device is connected to the fan and enters the airflow, the fan and the pipeline are easily separated, resulting in the inability to detect the air volume. Some general fan air volume measuring devices are connected to the fan cover by using multiple sets of bolts to ensure the connectivity between the pipeline and the fan cover. However, in this way, since the air volume of multiple sets of fans needs to be detected, and the disassembly and assembly of multiple sets of bolts is complicated, the speed is too slow and cannot be quickly disassembled and assembled. For this reason, a general fan air volume measuring device is proposed. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a universal fan air volume measuring device to solve the above-mentioned technical problem of being unable to perform rapid disassembly and assembly operations.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a general fan air volume measuring device, comprising:

[0008] A rectifier box and an air inlet pipe arranged on one side, and a connecting ring plate is installed at the outer end of the air inlet pipe;

[0009] A hollow cylinder is arranged at a corresponding position of the surface of the connecting ring plate, and one side of the surface of the hollow cylinder is threadedly connected with a threaded ring, a side hollow groove is opened in the center of the other side of the front and back sides of the hollow cylinder, and a guide column is inserted transversely into the inner cavity of the hollow cylinder;

[0010] The outer rod is arranged in the side slot and is hinged with the corresponding part of the surface of the guide column. The inner end of the guide column is designed with a convex shape and a reset spring is sleeved on the surface, and the reset spring fits with the inner wall of the hollow tube. After the connecting ring plate is fitted with the fan cover, it is inserted into the hollow tube, and the compressed guide column is released and reset under the action of the reset spring. The outer rod is expanded outward through the side slot and fits with the corresponding part of the surface of the fan cover. Then the threaded ring is rotated and fits with the surface of the connecting ring plate. On the one hand, the device and the fan cover can be quickly disassembled and assembled; on the other hand, the stability of the connection between the device and the fan cover can be ensured to avoid separation during air volume detection.

[0011] Preferably, the other side of the rectifier box is connected to an exhaust pipe, and a connecting ring plate is installed at the outer end of the exhaust pipe. The rectifier box discharges the airflow through the exhaust pipe and can be connected to the corresponding structure through the connecting ring plate.

[0012] Preferably, a eliminator plate is provided on one side of the inner cavity of the rectifier box, and the eliminator plate is designed as a honeycomb structure, and a differential pressure transmitter is installed at the center of the other side of the top and bottom of the rectifier box. The rectifier box can eliminate the turbulence and vortex of the airflow through the eliminator plate of the honeycomb structure to ensure the accuracy of the air volume measurement data, and the differential pressure signal measured by the differential pressure transmitter is converted into an electrical signal for subsequent data processing and analysis.

[0013] Preferably, a rotating ring plate is rotatably connected to the other side of the center of the surface of the rectifier box, and limit rods are added around the surface of the rotating ring plate and fit between the surfaces of the rectifier box. When the rotating ring plate rotates, the limit rods rotate in the same direction along the surface of the rectifier box.

[0014] Preferably, the top and bottom centers of the rotating ring plate are both equipped with rotating handles, and the upper and lower parts of the inner cavity center of the rotating ring plate are both equipped with threaded rods, which are coaxially connected between the corresponding rotating handles. The rotating handle can drive the threaded rod to rotate in the inner cavity of the rotating ring plate.

[0015] Preferably, the center of the surface of the threaded rod is sleeved with a sliding block, and the inner side of the sliding block is installed with an average velocity tube, and the outer side of the sliding block is tightly fitted with a fitting rod. The sliding block drives the average velocity tube according to the direction of the threaded rod and moves up and down against the fitting rod. The average velocity tube is used to measure the speed of the stable airflow after rectification, and usually includes one or more sensors for capturing the data of the airflow speed. On the one hand, the distance between the two groups of average velocity tubes can be adjusted to detect the air volume at different heights of the inner cavity of the rotating ring plate; on the other hand, the rotating rotating ring plate can adjust the average velocity tube to different positions in the inner cavity of the rotating ring plate, and can perform all-round detection, while ensuring the accuracy of the detection data.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a universal fan air volume measuring device, which has the following beneficial effects:

[0018] The universal fan air volume measuring device is manufactured by fitting a connecting ring plate with the fan cover and then inserting it into a hollow cylinder. The compressed guide column is released and reset under the action of a reset spring. The outer rod is then expanded outward through a side slot and fits with a corresponding portion of the fan cover surface. The threaded ring is then rotated and fits with the surface of the connecting ring plate. This method can, on the one hand, enable quick disassembly and assembly operations between the device and the fan cover; on the other hand, it can ensure the stability of the connection between the device and the fan cover, avoiding separation during air volume detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the hollow cylinder of the utility model;

[0021] Figure 3 This is a schematic diagram of the rectifier box and its partial connection structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the rotating ring plate and its partial connection structure of the utility model.

[0023] In the figure: 1. rectifier box; 2. air inlet pipe; 3. connecting ring plate; 4. hollow cylinder; 5. threaded ring; 6. side slot; 7. guide column; 8. outer rod; 9. reset spring; 10. elimination plate; 11. differential pressure transmitter; 12. rotating ring plate; 13. limit rod; 14. rotating handle; 15. threaded rod; 16. average velocity tube; 17. fitting rod; 18. exhaust pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] The utility model provides a technical solution, a universal fan air volume measuring device, comprising: Figure 1 , a rectifier box 1, and an air inlet pipe 2 arranged on one side, and a connecting ring plate 3 is installed at the outer end of the air inlet pipe 2;

[0026] See also Figure 2 , a hollow cylinder 4 is arranged at a corresponding position on the surface of the connecting ring plate 3, and a threaded ring 5 is threadedly connected to one side of the surface of the hollow cylinder 4, a side hollow groove 6 is opened in the center of the other side of the front and back sides of the hollow cylinder 4, and a guide column 7 is inserted transversely into the inner cavity of the hollow cylinder 4;

[0027] The outer rod 8 is arranged in the side slot 6 and is hinged with the corresponding part of the surface of the guide column 7. The inner end of the guide column 7 is designed with a convex shape and a reset spring 9 is sleeved on the surface, and the reset spring 9 fits with the inner wall of the hollow tube 4. After the connecting ring plate 3 fits with the fan cover, it is inserted into the hollow tube 4, and the compressed guide column 7 is released and reset under the action of the reset spring 9. The outer rod 8 is expanded outward through the side slot 6 and fits with the corresponding part of the fan cover surface. Then the threaded ring 5 is rotated and fits with the surface of the connecting ring plate 3. On the one hand, the device and the fan cover can be quickly disassembled and assembled; on the other hand, the stability of the connection between the device and the fan cover can be ensured to avoid separation during air volume detection.

[0028] See also Figure 1 The other side of the rectifier box 1 is connected to an exhaust pipe 18, and a connecting ring plate 3 is installed at the outer end of the exhaust pipe 18. The rectifier box 1 discharges the airflow through the exhaust pipe 18 and can be connected to the corresponding structure through the connecting ring plate 3.

[0029] See also Figure 3 A eliminator plate 10 is provided on one side of the inner cavity of the rectifier box 1, and the eliminator plate 10 is designed as a honeycomb structure, and a differential pressure transmitter 11 is installed at the center of the other side of the top and bottom of the rectifier box 1. The rectifier box 1 can eliminate the turbulence and vortex of the airflow through the eliminator plate 10 of the honeycomb structure to ensure the accuracy of the air volume measurement data, and the differential pressure signal measured by the differential pressure transmitter 11 is converted into an electrical signal for subsequent data processing and analysis.

[0030] See also Figure 4, a rotating ring plate 12 is rotatably connected to the other side of the center of the surface of the rectifier box 1, and limit rods 13 are provided around the surface of the rotating ring plate 12, and fit between the surfaces of the rectifier box 1. When the rotating ring plate 12 rotates, the limit rods 13 rotate in the same direction along the surface of the rectifier box 1. Rotating handles 14 are installed at the top and bottom centers of the rotating ring plate 12, and threaded rods 15 are provided at the upper and lower parts of the center of the inner cavity of the rotating ring plate 12, and are coaxially connected between the corresponding rotating handles 14. The threaded rod 15 can be driven to rotate in the inner cavity of the rotating ring plate 12 by the rotating handle 14. Sliding blocks are sleeved at the center of the surface of the threaded rod 15, and the inner side of the sliding block is installed with a velocity averaging tube 16, and a fitting rod 17 is tightly fitted on the outer side of the sliding block. The sliding block drives the velocity averaging tube 16 according to the direction of the threaded rod 15 and moves up and down against the fitting rod 17. The velocity averaging tube 16 is used to measure the speed of the stable airflow after rectification, and usually includes one or more sensors for capturing the data of the airflow speed. On the one hand, the distance between the two groups of velocity averaging tubes 16 can be adjusted to detect the air volume at different heights in the inner cavity of the rotating ring plate 12; on the other hand, the rotating rotating ring plate 12 can adjust the velocity averaging tube 16 to different positions in the inner cavity of the rotating ring plate 12, so that all-round detection can be carried out, while ensuring the accuracy of the detection data.

[0031] This solution: After the connecting ring plate 3 is fitted with the fan cover, it is inserted into the hollow cylinder 4, and the compressed guide column 7 is released to reset under the action of the reset spring 9. The outer rod 8 is expanded outward through the side slot 6 and fits with the corresponding part of the fan cover surface. Then the threaded ring 5 is rotated and fits with the surface of the connecting ring plate 3. The rectifier box 1 can eliminate the turbulence and vortex of the airflow through the elimination plate 10 of the honeycomb structure. The threaded rod 15 can be driven to rotate in the inner cavity of the rotating ring plate 12 by the rotating handle 14. The sliding block drives the average velocity tube 16 according to the direction of the threaded rod 15 and moves up and down against the fitting rod 17. The average velocity tube 16 is used to measure the speed of the stable airflow after rectification. When the rotating ring plate 12 rotates, the limit rod 13 rotates in the same direction along the surface of the rectifier box 1 to adjust the orientation of the average velocity tube 16.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal fan air volume measuring device, characterized in that: include: A rectifier box (1), and an air inlet pipe (2) arranged on one side, wherein a connecting ring plate (3) is installed at the outer end of the air inlet pipe (2); A hollow cylinder (4) is arranged at a corresponding position on the surface of the connecting ring plate (3), and a threaded ring (5) is threadedly connected to one side of the surface of the hollow cylinder (4), a side hollow groove (6) is opened at the center of the other side of the front and back sides of the hollow cylinder (4), and a guide column (7) is transversely inserted into the inner cavity of the hollow cylinder (4); The outer rod (8) is arranged in the side hollow groove (6) and is hinged to the corresponding position of the surface of the guide column (7). The inner end of the guide column (7) is convexly designed and is sleeved with a return spring (9) on the surface. The return spring (9) is in contact with the inner wall of the hollow cylinder (4).

2. A universal fan air volume measuring device according to claim 1, characterized in that: The other side of the rectifier box (1) is connected to an exhaust pipe (18), and a connecting ring plate (3) is installed at the outer end of the exhaust pipe (18).

3. A universal fan air volume measuring device according to claim 2, characterized in that: A elimination plate (10) is provided on one side of the inner cavity of the rectifier box (1), and the elimination plate (10) is designed as a honeycomb structure. A pressure differential transmitter (11) is installed at the center of the other side of the top and bottom of the rectifier box (1).

4. A universal fan air volume measuring device according to claim 3, characterized in that: A rotating ring plate (12) is rotatably connected to the other side of the center of the surface of the rectifier box (1), and limiting rods (13) are provided around the surface of the rotating ring plate (12) and fit between the surfaces of the rectifier box (1).

5. A universal fan air volume measuring device according to claim 4, characterized in that: The top and bottom centers of the rotating ring plate (12) are both equipped with rotating handles (14), and the upper and lower parts of the inner cavity center of the rotating ring plate (12) are both provided with threaded rods (15) which are coaxially connected between the corresponding rotating handles (14).

6. A universal fan air volume measuring device according to claim 5, characterized in that: The center of the surface of the threaded rod (15) is sleeved with a sliding block, and the inner side of the sliding block is installed with a velocity averaging tube (16), and the outer side of the sliding block is tightly fitted with a fitting rod (17).

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