Calibration device for positive pressure sonic nozzle air flow test bed

Abstract

The utility model discloses a positive pressure method sound speed nozzle air flow test platform's calibrating device, including the support guide frame for supporting, is located the rear end surface center of support guide frame fixedly seted up servo motor, and is located servo motor's output setting has two -way screw rod. The utility model discloses a guide device is set up, when the air flow of different models flowmeter is carried out air flow verification, and the speed reducer can through the sliding limit of transmission axle and transmission guide groove, and then synchronous belt drive two sets of positioning gear rotate, make positioning gear can synchronous belt drive two sets of transmission gear ring and carry out the overturning of cycle 90 degrees to the subsequent first detection pipe and second detection pipe of different diameter carry out alignment, effectively improve the adaptability of equipment to the different models flowmeter and carry out the verification, and then improve the practicality of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of flow meter testing equipment, specifically a calibration device for a positive pressure sonic nozzle air flow test bench. Background Technology

[0002] The calibration device of the positive pressure sonic nozzle air flow test bench is based on the principle of gas dynamics. By constructing a stable gas flow field and measurement system, it can achieve accurate calibration of various flow meters, such as gas rotary flow meters, gas full-wheel flow meters, vortex flow meters, gas vortex flow meters, gas ultrasonic flow meters, thermal gas mass flow meters, Coriolis flow meters, and other flow meters.

[0003] Although existing calibration devices can perform flow meter testing, they require different diameter connecting pipes when testing different flow meters. These connecting pipes occupy a large area and are cumbersome to replace, reducing the equipment's adaptability to different flow meters. Therefore, there is an urgent need for a calibration device for a positive pressure sonic nozzle air flow test bench to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a calibration device for a positive pressure sonic nozzle airflow test bench to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a calibration device for a positive pressure sonic nozzle airflow test bench, comprising a support guide for support, a servo motor fixedly disposed at the center of the rear end face of the support guide, and a bidirectional lead screw disposed at the output end of the servo motor.

[0006] The guide device comprises two sets, and the two sets of guide devices are threadedly connected to the upper end face of the support guide seat via the bidirectional lead screw. The guide device is used for alignment and guidance.

[0007] The first detection tube is provided in four sets. The four sets of the first detection tube are fixedly and equidistantly attached to the inner end face of the guide device on the side away from the servo motor. The inner end face of the guide device located near the servo motor is fixedly and equidistantly attached to four sets of the second detection tube. A flow meter is sealed between the first detection tube and the second detection tube.

[0008] A transmission shaft is rotatably engaged at the middle of the upper end face of the support guide, and a reduction motor is provided at the rear of the support guide directly opposite the transmission shaft.

[0009] Preferably, the guiding device includes a fixed bracket, a guide turntable is rotatably engaged on the inner end face of the fixed bracket, and four sets of limiting slots are equidistantly provided on the inner end face of the guide turntable. A transmission gear ring is fixedly provided on the outer end face of the guide turntable. A positioning guide groove is provided at the bottom of the inner end face of the fixed bracket, and a limiting sleeve is rotatably engaged on the inner end face of the fixed bracket through the positioning guide groove. A positioning gear is provided on the outer end face of the limiting sleeve. A transmission guide groove is provided at the center of the inner end face of the limiting sleeve. A threaded guide seat is fixedly provided at the center of the lower end face of the fixed bracket.

[0010] Preferably, the fixed bracket is adapted to the bidirectional lead screw through the threaded guide and is threadedly connected to the upper end face of the support guide, which facilitates the quick and convenient alignment and installation of the flow meter and improves the convenience of calibrating different models of flow meters.

[0011] Preferably, the upper end face of the positioning gear meshes with the transmission gear ring, which can effectively improve the stability of subsequent transmission.

[0012] Preferably, the four sets of first and second detection tubes are coaxially arranged, and the radii of the four sets of first and second detection tubes decrease sequentially. The first and second detection tubes are fixedly connected to the inner end face of the guide turntable through the limiting slot. The four sets of first and second detection tubes with different diameters can effectively improve the adaptability of the equipment and facilitate the rapid calibration of different flow meters in the future.

[0013] Preferably, the transmission shaft slides and engages with the limiting sleeve via the transmission guide groove, which effectively improves the stability and accuracy of subsequent transmission, thereby facilitating the adjustment of providing sufficient power to the positioning gear and transmission ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. By setting a guiding device, this utility model enables the reduction motor to drive two sets of positioning gears to rotate synchronously through the sliding limit of the transmission shaft and the transmission guide groove when calibrating the air flow of different models of flow meters. This allows the positioning gears to drive two sets of transmission gear rings to rotate 90 degrees in a cycle, which facilitates the subsequent alignment of the first and second detection tubes of different diameters. This effectively improves the adaptability of the equipment to calibrating different models of flow meters and thus enhances the practical performance of the equipment.

[0016] 1. This utility model, through its rotary design, can effectively reduce the footprint of the equipment, thereby improving the ease of use. Attached Figure Description

[0017] Figure 1 This is an exploded view of the main body of this utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 3 This is an exploded view of the guiding device of this utility model;

[0020] Figure 4 For the present utility model Figure 3 A magnified view of a section at point I;

[0021] Figure 5 This is a schematic diagram of the guiding device of this utility model.

[0022] In the diagram: 1-Servo motor, 2-Guide device, 3-Support guide seat, 4-Transmission shaft, 5-First detection tube, 6-Flow meter, 7-Second detection tube, 8-Gear motor, 9-Two-way lead screw, 21-Limiting slot, 22-Guide turntable, 23-Positioning guide groove, 24-Threaded guide seat, 25-Fixed seat, 26-Transmission gear ring, 27-Positioning gear, 28-Limiting sleeve, 29-Transmission guide groove. Detailed Implementation

[0023] 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 protection scope of the present utility model.

[0024] Please see Figure 1-5 The present invention provides an embodiment of a calibration device for a positive pressure sonic nozzle airflow test bench, comprising a support guide 3 for support, a servo motor 1 fixedly disposed at the center of the rear end face of the support guide 3, and a bidirectional lead screw 9 disposed at the output end of the servo motor 1.

[0025] The guide device 2 has two sets, and the two sets of guide devices 2 are connected to the upper end face of the support guide seat 3 by a two-way screw 9. The guide device 2 is used for alignment and guidance.

[0026] The first detection tube 5 is provided in four sets. The four sets of first detection tubes 5 are fixedly and equidistantly connected to the inner end face of the guide device 2 on the side away from the servo motor 1. The inner end face of the guide device 2 located near the servo motor 1 is fixedly and equidistantly connected to four sets of second detection tubes 7. A flow meter 6 is sealed between the first detection tube 5 and the second detection tube 7.

[0027] The transmission shaft 4 is rotatably engaged at the middle of the upper end face of the support guide 3, and a reduction motor 8 is provided at the rear of the support guide 3 directly opposite the transmission shaft 4.

[0028] The guide device 2 includes a fixed bracket 25, a guide turntable 22 is rotatably engaged on the inner end face of the fixed bracket 25, and four sets of limiting slots 21 are equidistantly opened on the inner end face of the guide turntable 22. A transmission gear ring 26 is fixedly installed on the outer end face of the guide turntable 22. A positioning guide groove 23 is opened at the bottom of the inner end face of the fixed bracket 25, and a limiting sleeve 28 is rotatably engaged on the inner end face of the fixed bracket 25 through the positioning guide groove 23. A positioning gear 27 is installed on the outer end face of the limiting sleeve 28. A transmission guide groove 29 is opened at the center of the inner end face of the limiting sleeve 28. A threaded guide seat 24 is fixedly installed at the center of the lower end face of the fixed bracket 25.

[0029] The fixed bracket 25 is adapted to the bidirectional lead screw 9 through the threaded guide 24 and then threadedly connected to the upper end face of the support guide 3, which facilitates the quick and convenient alignment and installation of the flow meter 6 and improves the convenience of calibrating different models of flow meters 6.

[0030] The upper end face of the positioning gear 27 meshes with the transmission gear ring 26, which can effectively improve the stability of subsequent transmission.

[0031] The four sets of first detection tubes 5 and second detection tubes 7 are all coaxially arranged, and the radii of the four sets of first detection tubes 5 and second detection tubes 7 decrease sequentially. The first detection tubes 5 and second detection tubes 7 are fixedly connected to the inner end face of the guide turntable 22 through the limiting slot 21. The four sets of first detection tubes 5 and second detection tubes 7 with different diameters can effectively improve the adaptability of the equipment and facilitate the rapid calibration of different flow meters in the future.

[0032] The transmission shaft 4 slides and engages with the limiting sleeve 28 via the transmission guide groove 29, which can effectively improve the stability and accuracy of subsequent transmission, thereby facilitating the subsequent adjustment of providing sufficient power to the positioning gear 27 and the transmission gear ring 26.

[0033] Working principle: First, the operator can seal and align the flow meter 6 to be tested between the first detection tube 5 and the second detection tube 7 of appropriate diameter. When adjusting the alignment of the first detection tube 5 and the second detection tube 7 of different diameters, the operator can start the reduction motor 8. At this time, the reduction motor 8 can drive the transmission shaft 4 to rotate. Simultaneously, the transmission shaft 4 can slide and limit the movement with the transmission guide groove 29, thereby synchronously driving the two sets of positioning gears 27 to rotate. The two sets of positioning gears 27 can mesh with the transmission gear ring 26, thereby synchronously driving the guide turntable 22 to rotate 90 degrees, so that the guide turntable 22 can drive the first detection tube 5 and the second detection tube 7 of different diameters to rotate for alignment. After alignment, the operator can start the servo motor 1. At this time, the servo motor 1 can be connected to the threaded guide seat 24 through the bidirectional lead screw 9, thereby driving the first detection tube 5 and the second detection tube 7 to move centripetally, thus limiting the flow meter 6 to the coaxial center, facilitating detection and locking. During the test, the operator can connect the first detection tube 5 to the external high-pressure air supply module. Then, during the test, the air supply module can introduce gas through the first detection tube 5, thereby forming a stable positive pressure airflow. Subsequently, the airflow passes through the flow meter 6 and the second detection tube 7. After passing through the second detection tube 7, the external calculation module can quickly calculate the airflow of the flow meter 6 to complete the operation.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A calibration device for a positive pressure sonic nozzle airflow test bench, comprising a support guide (3) for support, a servo motor (1) fixedly disposed at the center of the rear end face of the support guide (3), and a bidirectional lead screw (9) disposed at the output end of the servo motor (1), characterized in that: The guide device (2) is provided in two sets, and the two sets of the guide device (2) are threadedly connected to the upper end face of the support guide seat (3) through the bidirectional screw (9). The guide device (2) is used for alignment and guidance. The first detection tube (5) is provided in four groups. The four groups of first detection tubes (5) are fixedly and equidistantly attached to the inner end face of the guide device (2) on the side away from the servo motor (1). The inner end face of the guide device (2) located near the servo motor (1) is fixedly and equidistantly attached to four groups of second detection tubes (7). A flow meter (6) is sealed between the first detection tube (5) and the second detection tube (7). A transmission shaft (4) is rotatably engaged at the middle of the upper end face of the support guide (3), and a reduction motor (8) is provided at the rear of the support guide (3) directly opposite the transmission shaft (4).

2. The calibration device for the positive pressure method sonic nozzle airflow test bench according to claim 1, characterized in that: The guiding device (2) includes a fixed bracket (25), the inner end face of which is rotatably engaged with a guide turntable (22), and four sets of limiting slots (21) are equidistantly provided on the inner end face of the guide turntable (22). A transmission gear ring (26) is fixedly provided on the outer end face of the guide turntable (22). A positioning guide groove (23) is provided at the bottom of the inner end face of the fixed bracket (25), and a limiting sleeve (28) is rotatably engaged on the inner end face of the fixed bracket (25) through the positioning guide groove (23). A positioning gear (27) is provided on the outer end face of the limiting sleeve (28). A transmission guide groove (29) is provided at the center of the inner end face of the limiting sleeve (28). A threaded guide seat (24) is fixedly provided at the center of the lower end face of the fixed bracket (25).

3. The calibration device for the positive pressure method sonic nozzle airflow test bench according to claim 2, characterized in that: The fixed bracket (25) is adapted to the bidirectional lead screw (9) through the threaded guide (24) and then threadedly connected to the upper end face of the support guide (3).

4. The calibration device for the positive pressure method sonic nozzle airflow test bench according to claim 2, characterized in that: The upper end face of the positioning gear (27) meshes with the transmission gear ring (26).

5. The calibration device for the positive pressure method sonic nozzle airflow test bench according to claim 2, characterized in that: The four sets of first detection tubes (5) and second detection tubes (7) are all coaxially arranged, and the radii of the four sets of first detection tubes (5) and second detection tubes (7) decrease sequentially. The first detection tube (5) and the second detection tube (7) are both fixedly attached to the inner end face of the guide turntable (22) through the limiting slot (21).

6. The calibration device for the positive pressure method sonic nozzle airflow test bench according to claim 2, characterized in that: The transmission shaft (4) slides and engages with the limiting sleeve (28) through the transmission guide groove (29).

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