Thermal type gas flowmeter

Abstract

The utility model relates to the technical field of gas flow meters, and discloses a thermal type gas flow meter which comprises a flow meter body and a detection head installed at the bottom of the flow meter body, and further comprises an installation base fixed to the surface of the flow meter body, and installation shells are fixedly connected to the two sides of the surface of the installation base. One side of an inner cavity of the mounting shell is fixedly connected with an extension spring, the other end of the extension spring is fixedly connected with a movable block, and the bottom of the movable block is rotationally connected with a fixed plate; according to the utility model, the position of the fixed plate can be adjusted through the cooperation of the extension spring and the movable block, thereby facilitating the positioning of pipelines with different diameters, enabling the position of the detection head to be more accurate when the detection head is installed, and enabling the detection head to be more accurate under the cooperation of the clamping plate and the positioning mechanism. The flow meter can be supported by the mounting shell and the fixing plate, and the problems that when an existing flow meter is used, mounting is not convenient enough, and the measurement accuracy is prone to being affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas flow meters, and particularly relates to a thermal gas flow meter. Background Technique

[0002] A thermal gas flow meter is an instrument for measuring gas flow. A thermal gas flow meter is usually applicable to measuring the flow of low-flow-rate gases, such as air, natural gas, oxygen, etc. It has the characteristics of fast response, high precision, simple structure, etc., and is therefore widely used in industrial automation, petrochemical, electric power, environmental protection and other fields.

[0003] During the installation process of the existing flow meters, the detection head needs to be placed at the center of the pipeline. However, in the installation of most existing flow meters, the position of the detection head is adjusted manually by the staff in cooperation with the scale line. After the adjustment is completed, the observation of the position of the detection head is not intuitive enough, and the position of the detection head is likely to deviate, which is likely to affect the use effect of the flow meter;

[0004] At the same time, after the existing flow meter is installed, the display structure on its surface will protrude. During daily use, the flow meter is likely to vibrate during use, and the vibration will affect the measurement accuracy of the sensor, resulting in a large measurement error of the flow meter and reducing the accuracy of the gas measurement of the flow meter. Content of the Utility Model

[0005] The purpose of the utility model is to provide a thermal gas flow meter to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A thermal gas flow meter, including a flow meter body and a detection head installed at its bottom, further including:

[0007] A mounting seat fixed on the surface of the flow meter body. Both sides of the surface of the mounting seat are fixedly connected with mounting shells. One side of the inner cavity of the mounting shell is fixedly connected with a tension spring. The other end of the tension spring is fixedly connected with a movable block. The bottom of the movable block is rotatably connected with a fixing plate;

[0008] A positioning plate fixed on one side of the fixing plate. Rack plates are fixedly connected to both sides of the inner cavity of the mounting shell. Activity grooves are opened on both sides of the movable block. A positioning mechanism is installed on the top of the movable block. A clamping plate is fixedly connected to one side of the fixing plate.

[0009] Preferably, the positioning mechanism includes a fixing frame fixed on the top of the movable block and a threaded rod threadedly connected to the inner wall thereof. The bottom of the threaded rod is rotatably connected with a positioning block.

[0010] Preferably, a guiding groove is formed on one side of the movable block, a guiding block is slidably connected to the inner wall of the guiding groove, and one side of the guiding block is fixedly connected to the surface of the positioning block.

[0011] Preferably, a guiding rod is fixedly connected to the inner cavity of the mounting shell, and one end of the guiding rod penetrates through the other side of the movable block and is slidably connected to the inner wall at the penetration position.

[0012] Preferably, the surface of the movable block is slidably connected to the inner wall of the mounting shell, and the inner cavity of the movable block is slidably connected to the bottom of the mounting shell.

[0013] Preferably, the bottom of the fixing plate and the center point of the detection head are on the same horizontal line, and the fixing plate and the detection head are used in cooperation.

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

[0015] Through the cooperation of the tension spring and the movable block, the position of the fixing plate can be adjusted, so as to facilitate the positioning of pipes with different diameters, thereby making the position of the detection head more accurate during installation, reducing the situation where the position of the detection head is not accurate enough. At the same time, with the cooperation of the clamping plate and the positioning mechanism, the mounting shell and the fixing plate can support the flowmeter, thereby reducing the vibration of the flowmeter, effectively improving the accuracy of the flowmeter during measurement, and solving the problems that the existing flowmeter is not convenient to install and is prone to affecting the measurement accuracy during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the three-dimensional structure schematic diagram of the present utility model;

[0017] Figure 2 is the partial three-dimensional sectional structure schematic diagram of the present utility model;

[0018] Figure 3 is the partial three-dimensional structure schematic diagram of the present utility model from another perspective;

[0019] Figure 4 is the partial three-dimensional sectional structure schematic diagram of the present utility model from another perspective.

[0020] In the figure: 1, flowmeter body; 2, detection head; 3, mounting seat; 4, mounting shell; 5, tension spring; 6, movable block; 7, fixing plate; 8, rack plate; 9, movable groove; 10, positioning mechanism; 101, fixing frame; 102, threaded rod; 103, positioning block; 11, clamping plate; 12, guiding block; 13, guiding groove; 14, positioning plate; 15, guiding rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4As shown in the figure, a thermal gas flowmeter includes a flowmeter body 1. A detection head 2 is installed at the bottom of the flowmeter body 1. With the cooperation of the flowmeter body 1 and the detection head 2, the gas flow can be detected by detecting heat. A mounting seat 3 is fixedly connected to the surface of the flowmeter body 1. Installation shells 4 are fixedly connected to both sides of the surface of the mounting seat 3. A tension spring 5 is fixedly connected to one side of the inner cavity of the installation shell 4. The other end of the tension spring 5 is fixedly connected to a movable block 6. The surface of the movable block 6 is slidably connected to the inner wall of the installation shell 4, and the inner cavity of the movable block 6 is slidably connected to the bottom of the installation shell 4. Under this action, the movable block 6 can be limited by the cooperation of the installation shell 4 and the movable block 6, so that the movable block 6 will not easily have a large position deviation during movement, and it can also prevent the movable block 6 from moving out of the installation shell 4, effectively improving the limiting effect on the movable block 6 and preventing the movable block 6 from easily detaching from the inside of the installation shell 4 and affecting subsequent use. A fixed plate 7 is rotatably connected to the bottom of the movable block 6. The bottom of the fixed plate 7 is on the same horizontal line as the center point of the detection head 2. The fixed plate 7 and the detection head 2 are used in cooperation. Under this action, the position of the detection head 2 can be accurately known according to the position of the fixed plate 7, so that the position of the detection head 2 can be more accurate when the staff installs this flowmeter. When installing this flowmeter, the fixed plate 7 can be made to fit the surface of the pipeline through the cooperation of the tension spring 5 and the movable block 6. The detection head 2 can be adjusted to the center position of the pipeline according to the position of the bottom of the fixed plate 7. Not only is the position more accurate, but the situation of the detection head 2 being tilted in position is also reduced, making it more convenient and convenient for the staff to install this flowmeter. A positioning plate 14 is fixedly connected to one side of the fixed plate 7. The positioning plate 14 is designed with a flexible material. Under this action, when the fixed plate 7 contacts the surface of the pipeline, the friction with the pipeline can be increased under the action of the positioning plate 14, so that the fixed plate 7 can be more stable, avoiding the inaccurate position of the fixed plate 7 affecting the installation of the detection head 2 when installing the flowmeter body 1. A guide rod 15 is fixedly connected to the inner cavity of the installation shell 4. One end of the guide rod 15 penetrates to the other side of the movable block 6 and is slidably connected to the inner wall at its penetration point. Under this action, the guide rod 15 can guide the tension spring 5 during the stretching or rebounding process, so that the tension spring 5 can be more stable during use, avoiding the instability of the tension spring 5 during use and affecting the movement effect of the movable block 6. Rack plates 8 are fixedly connected to both sides of the inner cavity of the installation shell 4. Activity grooves 9 are formed on both sides of the movable block 6. The inner wall of the activity groove 9 is slidably connected to the surface of the rack plate 8. A positioning mechanism 10 is installed on the top of the movable block 6. The positioning mechanism 10 can fix the movable block 6 through the cooperation of the rack plate 8, so that the movable block 6 will not easily move. Under this action, the flowmeter body 1 can be supported, so that this flowmeter can be more stable during use.To reduce the shaking and instability of the flow meter body 1 under the action of gas flow during use, a clamping plate 11 is fixedly connected to one side of the fixing plate 7. The clamping plate 11 is designed as an arc structure. Under this action, the clamping plate 11 can be clamped on the surface of the pipeline, thereby cooperating with the mounting shell 4 and the fixing plate 7 to support the flow meter, effectively improving the stability of the flow meter during use.

[0023] The positioning mechanism 10 includes a fixed frame 101, the bottom of which is fixedly connected to the top of the movable block 6. The fixed frame 101 is designed as an L-shaped structure. The inner wall of the fixed frame 101 is threadedly connected with a threaded rod 102, and the bottom of the threaded rod 102 is rotatably connected with a positioning block 103. The surface of the positioning block 103 and the surface of the rack plate 8 are mutually embedded. Under this action, the position of the positioning block 103 can be adjusted by the threaded rod 102, so that the positioning block 103 is engaged with the surface of the rack plate 8, thereby limiting the movable block 6, which is not only more convenient, but also convenient for fixing the movable block 6 at any position. A guide groove 13 is provided on one side of the movable block 6, and a guide block 12 is slidably connected to the inner wall of the guide groove 13. One side of the guide block 12 is fixedly connected to the surface of the positioning block 103. Under this action, the positioning block 103 can be guided when it moves, so that the positioning block 103 can be more stable when moving.

[0024] It is worth noting that the technical features such as the flowmeter body 1 and the detection head 2 proposed in this technical solution should be regarded as prior art. The specific structure, working principle, and possible control method and spatial layout method of these technical features can be selected according to conventional methods in the field, and this technical solution will not be further elaborated.

[0025] Working principle: first pull the two fixing plates 7 to make them stand out from the flow meter body 1, then insert the detection head 2 into the interior of the pipe, then loosen the fixing plate 7, and under the action of the tension spring 5, the fixing plate 7 can be driven by the movable block 6 to clamp the pipe, and with the cooperation of the fixing plate 7 and the pipe, the detection head 2 is adjusted to the center of the pipe, which is not only convenient but also can make the position of the detection head 2 more accurate. Then the staff fixes and installs the flow meter body 1, and then rotates the fixing plate 7 to make the positioning plate 11 fit with the surface of the pipe, and then rotates the threaded rod 102 to drive the positioning block 103 and the surface of the rack plate 8 to engage with each other under the action of the surface thread, so as to limit the movable block 6, and with the cooperation of the mounting shell 4 and the fixing plate 7, the surface of the flow meter body 1 is supported, so that the flow meter is more stable when in use.

[0026] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0027] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermal gas flow meter, comprising a flow meter body (1) and a detection head (2) mounted at the bottom thereof, characterized in that: Also includes: A mounting seat (3) fixed to the surface of the flow meter body (1), the mounting seat (3) having a mounting shell (4) fixedly connected to both sides of the surface, a tension spring (5) fixedly connected to one side of the inner cavity of the mounting shell (4), a movable block (6) fixedly connected to the other end of the tension spring (5), and a fixed plate (7) rotatably connected to the bottom of the movable block (6); A positioning plate (14) is fixed to one side of the fixed plate (7); rack plates (8) are fixedly connected to both sides of the inner cavity of the mounting shell (4); movable grooves (9) are provided on both sides of the movable block (6); a positioning mechanism (10) is installed on the top of the movable block (6); and a positioning plate (11) is fixedly connected to one side of the fixed plate (7).

2. A thermal gas flow meter according to claim 1, characterized in that: The positioning mechanism (10) comprises a fixing frame (101) fixed to the top of the movable block (6) and a threaded rod (102) threadedly connected to the inner wall thereof, and the bottom of the threaded rod (102) is rotatably connected to a positioning block (103).

3. A thermal gas flow meter according to claim 2, characterized in that: A guide groove (13) is provided on one side of the movable block (6); a guide block (12) is slidably connected to the inner wall of the guide groove (13); and one side of the guide block (12) is fixedly connected to the surface of the positioning block (103).

4. A thermal gas flow meter according to claim 1, characterized in that: A guide rod (15) is fixedly connected to the inner cavity of the mounting shell (4), and one end of the guide rod (15) penetrates to the other side of the movable block (6) and is slidably connected to the inner wall at the penetration point.

5. A thermal gas flow meter according to claim 1, characterized in that: The surface of the movable block (6) is slidably connected to the inner wall of the mounting shell (4), and the inner cavity of the movable block (6) is slidably connected to the bottom of the mounting shell (4).

6. A thermal gas flow meter according to claim 1, characterized in that: The bottom of the fixing plate (7) and the center point of the detection head (2) are located on the same horizontal line, and the fixing plate (7) is used in conjunction with the detection head (2).

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