Air flow indicating device

Abstract

The utility model discloses an air flow indicating device which comprises a barrel, a shaft body, a valve plate, a measurer, a handle, a guide mechanism and a positioning mechanism, the barrel is provided with an air duct, the shaft body is rotatably connected to the barrel, the valve plate is connected to the shaft body and arranged in the air duct, the measurer is connected to the barrel and used for measuring the air volume in the air duct, and the handle is arranged on the guide mechanism. The handle is arranged on the outer side of the barrel and connected with the shaft, the guide mechanism is connected to the barrel and comprises a rolling body, the rolling body is in rolling contact with the handle and used for supporting the handle to rotate, the positioning mechanism is connected to the handle and comprises a positioning pin, the positioning pin is connected to the handle and inserted into a positioning hole formed in the barrel, and the positioning pin is used for positioning the handle. And the handle is positioned. According to the air flow indicating device, the air volume measuring function is achieved through the measurer, the guide mechanism guides the handle to drive the valve plate to rotate stably, the positioning stability of the valve plate is improved through the positioning mechanism, and therefore the air flow indicating device has good usability.

Description

Technical Field

[0001] This utility model relates to the field of gas flow testing, and in particular to an air flow indicator device. Background Technology

[0002] A patent titled "Air Flow Indicator" has been published in the Chinese Patent Database, publication number CN112461302A, publication date: March 9, 2021. The specification states that when the control handle 221 is rotated, it can pivot along a guide groove via a guide member 223, and further rotate a valve plate 21 via a pivot 211 to change the angle of the valve plate 21 relative to the axial direction of the cylinder 1. In one embodiment, the guide member 223 is a pin, one end of which is screwed to the control handle 221, and the other end has a limiting protrusion and can slide along the guide groove on the base 222.

[0003] The drawback of this air flow indicator solution is that the control handle rotates in conjunction with the guide component, and the guide component slides in the guide groove. After long-term use, the guide component and the guide groove will wear down, and its positioning effect will be weakened. Utility Model Content

[0004] This application provides an airflow indicator device to improve the positioning effect after the handle is rotated.

[0005] This application provides an air flow indicator device, including:

[0006] The cylindrical body has air ducts;

[0007] The shaft is rotatably connected to the cylinder.

[0008] A valve plate, connected to the shaft and disposed in the air duct, is used to control the opening and closing of the air duct;

[0009] A measuring device is connected to the cylinder and is used to measure the air volume in the duct.

[0010] A handle is located on the outside of the cylinder and connected to the shaft.

[0011] A guiding mechanism is connected to the cylinder, the guiding mechanism including: a rolling element, the rolling element having rolling contact with the handle, the rolling element being used to support the handle to rotate;

[0012] A positioning mechanism is connected to the handle. The positioning mechanism includes a positioning pin, which is connected to the handle and inserted into a positioning hole in the cylinder to position the handle.

[0013] The beneficial effects of the above embodiments are as follows: the air volume measurement function is realized by the measuring device, the valve plate is rotated stably by the guide mechanism, and the valve plate positioning stability is improved by the positioning mechanism, thereby making the air flow indicator device more user-friendly.

[0014] Based on the above embodiments, the embodiments of this application can be further improved as follows:

[0015] In one embodiment of this application, the guiding mechanism further includes a mounting base, the mounting base having a plurality of grooves arranged around the shaft, and the rolling element being rotatably disposed in the grooves. The beneficial effect of this step is that the mounting base structure enables the assembly of the rolling element.

[0016] In one embodiment of this application: the guiding mechanism further includes a guide sleeve, the mounting base has a hole, the guide sleeve is connected to the hole, and the shaft is rotatably inserted into the guide sleeve. The beneficial effect of this step is that the guide sleeve improves the smoothness of shaft rotation.

[0017] In one embodiment of this application, the positioning mechanism further includes an elastic element disposed between the positioning pin and the handle, the elastic element applying an external force to the positioning pin toward the positioning hole. The beneficial effect of this step is that the elastic element allows the positioning pin to be held in the positioning hole.

[0018] In one embodiment of this application: the positioning hole is a tapered hole, and the positioning pin has a positioning end that matches the shape of the positioning hole. The beneficial effect of this step is that the self-centering property of the tapered structure improves the stability of the positioning effect.

[0019] In one embodiment of this application, the measuring device employs a gas ultrasonic flow meter and a thermal anemometer.

[0020] In one embodiment of this application, it further includes a gas detector, which is installed on the cylinder.

[0021] In one embodiment of this application, it further includes a display, which is mounted on the cylinder and is electrically connected to the measuring instrument and the gas detector.

[0022] In one embodiment of this application: the measuring device and the gas detector are powered remotely, by battery, or by solar power. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the air flow indicator device;

[0025] Figure 2 A schematic diagram of the guiding mechanism structure;

[0026] Figure 3 This is a schematic diagram of the positioning mechanism.

[0027] The components include: 1. cylinder, 101. positioning hole, 2. shaft, 3. valve plate, 4. measuring device, 5. handle, 6. guide mechanism, 601. rolling element, 602. mounting base, 603. guide sleeve, 7. positioning mechanism, 701. positioning pin, 702. elastic element, 703. positioning disc, and 8. power supply mechanism. Detailed Implementation

[0028] In this application, unless otherwise expressly specified and limited, the terminology used should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of different terms in this utility model according to the specific circumstances, and the scope of the specific meaning should be limited to achieving the function of this application.

[0029] In the description of this application, it should be understood that the directional terms or positional relationships described are based on the orientation or positional relationships shown in the accompanying drawings, or based on the orientation or positional relationships in actual use, and are only for the purpose of facilitating the description of the contents of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Example 1

[0031] like Figure 1-3As shown, an airflow indicator includes: a cylinder 1, a shaft 2, a valve plate 3, a measuring device 4, a handle 5, a guide mechanism 6, and a positioning mechanism 7. The cylinder 1 has an air duct. The shaft 2 is rotatably connected to the cylinder 1. The valve plate 3 is connected to the shaft 2 and disposed in the air duct. The valve plate 3 is used to control the opening and closing of the air duct. The measuring device 4 is connected to the cylinder 1 and is used to measure the airflow in the air duct. The handle 5 is disposed on the outside of the cylinder 1 and connected to the shaft 2. The guide mechanism 6 is connected to the cylinder 1 and includes a rolling element 601. The rolling element 601 rolls in contact with the handle 5 and is used to support the handle 5 to rotate. The positioning mechanism 7 is connected to the handle 5 and includes a positioning pin 701. The positioning pin 701 is connected to the handle 5 and is inserted into a positioning hole 101 in the cylinder 1 to position the handle 5.

[0032] Specifically, such as Figure 1 As shown, the cylinder 1 has flanges at both ends, which are used to connect to the air duct, thereby measuring the air volume passing through the air duct through the air flow indicator device.

[0033] Specifically, such as Figure 2 As shown, the guide mechanism 6 further includes a mounting base 602, which has a plurality of grooves arranged around the shaft 2. The rolling element 601 is rotatably disposed in the groove. There are multiple grooves and they are evenly distributed on the same circumference with the axis of the shaft 2 as the center line. Each groove accommodates one rolling element 601.

[0034] Specifically, such as Figure 2 As shown, the mounting base 602 has an overall annular disc structure and is connected to the outside of the cylinder 1 by welding or bolting. The mounting base 602 includes a base body and an end cap. The rolling element 601 has a spherical structure. The base body and the end cap are provided with matching grooves for the rolling element 601. The thickness of the end cap is less than the radius of the rolling element 601, so that part of the structure of the rolling element 601 is exposed on the outside of the mounting base 602. This part of the structure is in contact with the back of the handle 5 (the back refers to the surface facing the mounting base 602). The end cap confines the rolling element 601 in the mounting base 602. The rolling element 601 can rotate in any direction in the mounting base 602. This structure enables the detachable assembly of the rolling element 601.

[0035] Specifically, such as Figure 2 As shown, the guide mechanism 6 further includes a guide sleeve 603. The mounting base 602 has a hole, which is the inner hole of the mounting base 602. The guide sleeve 603 is connected in the hole, and the shaft 2 is rotatably inserted into the guide sleeve 603.

[0036] Specifically, such as Figure 2 As shown, a sealing ring is also fitted around the outer periphery of the part of the shaft 2 that is inserted into the cylinder 1, which improves the sealing effect.

[0037] Specifically, such as Figure 3 As shown, the positioning mechanism 7 further includes an elastic element 702, which is disposed between the positioning pin 701 and the handle 5. The elastic element 702 applies an external force to the positioning pin 701 to move toward the positioning hole 101.

[0038] Specifically, such as Figure 3 As shown, the pin is slidably inserted into the guide hole of the handle 5. The outer periphery of the pin is connected to the positioning plate 703. The positioning plate 703 has a threaded hole, and the pin is equipped with a threaded section. The positioning plate 703 is threadedly connected to the threaded section. The elastic element 702 is a compression spring. The compression spring is fitted onto the positioning pin 701 and is located between the handle 5 and the positioning plate 703. By adjusting the position of the positioning plate 703, the pushing force of the elastic element 702 on the pin can also be adjusted.

[0039] Specifically, such as Figure 3 As shown, the positioning hole 101 is a tapered hole, and the positioning pin 701 has a positioning end that matches the shape of the positioning hole 101. There are at least two positioning holes 101, so that the valve plate 3 can be positioned in at least a horizontal and a vertical state (taking the cylinder 1 in a vertical state as an example).

[0040] Specifically, such as Figure 1 As shown, the measuring device 4 is connected to an external power supply. The measuring device 4 can be a gas ultrasonic flow meter or a thermal anemometer. Taking the gas ultrasonic flow meter as an example, the SICK Sensor Intelligen FLOWSIC100 gas ultrasonic flow meter is used. The gas ultrasonic flow meter is installed in the cylinder 1 and its detection end extends into the air duct. At the same time, it is equipped with an MCU controller with an LC display (an optional product for the gas ultrasonic flow meter). The MCU controller is installed on the outside of the cylinder 1 to display the air volume in real time. The thermal anemometer is used to measure the gas velocity and temperature.

[0041] When using this air flow indicator, the cylinder 1 is installed in the air duct, the positioning pin 701 is pulled out from the positioning hole 101, the handle 5 is rotated until the valve is in the open state, the positioning pin 701 is released, the positioning pin 701 is inserted into the positioning hole 101, and the measuring device 4 measures the air volume in the air duct in real time.

[0042] Example 2

[0043] The difference from Embodiment 1 is that the air flow indicator further includes a gas detector. Specifically, the gas detector is a fixed gas detector, which is an existing product and can be directly purchased. The gas detector is installed in the cylinder and is used to detect the types of components in the gas.

[0044] Example 3

[0045] The difference from Embodiment 2 is that the air flow indicator further includes a display, which is installed in the cylinder and electrically connected to the measuring instrument and the gas detector. The display replaces the display of the ultrasonic gas flow meter and is electrically connected to the controller. The controller can be a PLC controller or an MCU controller. The controller converts the electrical signals of the measuring instrument and the gas detector into specific measurement values ​​and displays them on the display, specifically showing gas flow rate, velocity, temperature, and type information. Both the display and the controller are existing products and can be purchased directly.

[0046] Example 4

[0047] The difference from Example 3 is that, as Figure 1 As shown, the measuring device and the gas detector are powered remotely (e.g., connected to the power grid via an electric wire), or by battery or solar power.

[0048] Taking solar power as an example, the air flow indicator also includes a power supply mechanism 8, which includes a solar panel and a battery. The power supply mechanism 8 is an existing product and can be purchased directly. The solar panel is installed on the outside of the cylinder 1 through a bracket, and the battery is installed on the outside of the cylinder 1. The solar panel and the battery are connected by wires, and the battery is connected to the measuring device 4 by wires. The battery continuously supplies power to the measuring device 4.

[0049] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. An airflow indicator, characterized in that, include: The cylindrical body has air ducts; The shaft is rotatably connected to the cylinder. A valve plate, connected to the shaft and disposed in the air duct, is used to control the opening and closing of the air duct; A measuring device is connected to the cylinder and is used to measure the air volume in the duct. A handle is located on the outside of the cylinder and connected to the shaft. A guiding mechanism is connected to the cylinder, the guiding mechanism including: a rolling element, the rolling element having rolling contact with the handle, the rolling element being used to support the handle to rotate; A positioning mechanism is connected to the handle. The positioning mechanism includes a positioning pin, which is connected to the handle and inserted into a positioning hole in the cylinder to position the handle.

2. The air flow indicator device according to claim 1, characterized in that, The guiding mechanism further includes a mounting base, which has a plurality of grooves arranged around the shaft, and the rolling element is rotatably disposed in the grooves.

3. The air flow indicator device according to claim 2, characterized in that, The guiding mechanism further includes a guide sleeve, the mounting base has a hole, the guide sleeve is connected in the hole, and the shaft is rotatably inserted into the guide sleeve.

4. The air flow indicator device according to claim 1, characterized in that, The positioning mechanism further includes an elastic element disposed between the positioning pin and the handle, the elastic element applying an external force to the positioning pin to move toward the positioning hole.

5. The air flow indicator device according to claim 1, characterized in that, The positioning hole is a tapered hole, and the positioning pin has a positioning end that matches the shape of the positioning hole.

6. The air flow indicator device according to claim 1, characterized in that, The measuring instruments used are an ultrasonic gas flow meter and a thermal anemometer.

7. The air flow indicator device according to claim 6, characterized in that, Also includes: A gas detector is installed on the cylinder.

8. The air flow indicator device according to claim 7, characterized in that, Also includes: A display is mounted on the cylinder and is electrically connected to the measuring instrument and the gas detector.

9. The air flow indicator device according to claim 7, characterized in that, The measuring device and the gas detector are powered remotely, by battery, or by solar power.

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