Thermal type gas flowmeter

Abstract

The utility model discloses a thermal type gas flow meter, which relates to the technical field of gas flow meters and comprises a mounting pipe, a degree sensor and a heating sensor are mounted at the bottom end of the mounting pipe, an equipotential adjusting component is mounted on the mounting pipe and comprises a threaded rod rotatably mounted on the mounting pipe, and reverse symmetrical threads are arranged at the bottom end of the threaded rod. A group of moving blocks are in threaded connection with reverse threads at the bottom end of the threaded rod respectively, abutting rods are mounted on the moving blocks, the two groups of abutting rods face opposite directions, the length directions of the threaded rod and the abutting rods are consistent with the length direction of the mounting pipe, and a position adjusting assembly is mounted at the top end of the threaded rod; the threaded rod is rotated through the position adjusting assembly, the threaded rod rotates to drive the abutting rod to move reversely, and when the abutting rod makes contact with the pipe wall at the same time, the heating sensor can be located at the optimal position.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas flow meters, in particular to a thermal gas flow meter. Background Art

[0002] Thermal gas flow meters are based on the principle of heat diffusion. Specifically, they use two sets of sensors. One set of sensors is placed in the gas to be measured at a constant temperature higher than the ambient temperature, and the other set of sensors automatically compensates for the temperature carried away by the gas flow. The gas flow rate can be calculated based on the proportional relationship between the temperature difference between the two sets of sensors and the current.

[0003] When the thermal gas flow meter is inserted into the pipeline, if the sensor is too low, it is easy to collide with the pipe wall and damage the sensor. If the sensor is too high, the measured flow rate will be inaccurate. It is best to measure when the center point of the sensor is at the center of the pipeline. Utility Model Content

[0004] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a thermal gas flow meter to solve the problems mentioned in the background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A thermal gas flowmeter includes a mounting tube, a degree sensor and a heating sensor are installed at the bottom end of the mounting tube, an equal position adjustment component is installed on the mounting tube, the equal position adjustment component includes a threaded rod rotatably mounted on the mounting tube, the bottom end of the threaded rod is a reverse symmetrical thread, and a group of moving blocks are respectively threadedly connected to the reverse threads at the bottom end of the threaded rod, abutment rods are installed on the moving blocks, and the two groups of abutment rods face opposite directions, the length directions of the threaded rods and the abutment rods are consistent with the length direction of the mounting tube, and a position adjustment component is installed at the top end of the threaded rod.

[0007] As an optimal technical solution, a receiving groove is provided on the mounting tube, the top and bottom ends of the receiving groove are open and the opening is facing the end away from the center of the circle, the length direction of the receiving groove is consistent with the length direction of the mounting tube, and the threaded rod is rotatably installed in the receiving groove.

[0008] As an optimal technical solution, a pull-out mounting block is slidably installed on the end of the moving block away from the heating sensor, and the abutment rod is installed on the pull-out mounting block. An elastic member is installed between the abutment rod and the moving block and when the elastic member is freely extended, the abutment rod extends out of the accommodating groove.

[0009] As an optimal technical solution, the position adjustment assembly includes gear 1 installed on the top of the threaded rod, and gear 2 is also installed on the mounting tube. Gear 1 is meshed with gear 2. A manual rod is installed on gear 2 and the manual rod is coaxial with gear 2. The manual rod is located outside the mounting tube.

[0010] As a preferred technical solution, the reverse symmetrical threads at the bottom end of the threaded rod are divided by the same horizontal plane as the center point of the heating sensor.

[0011] As a preferred technical solution, an intermediate block is installed at the boundary to serve as a partition.

[0012] As an optimal technical solution, a protective probe is installed at the bottom of the installation tube. A slot is opened through the protective probe to facilitate airflow. The temperature sensor and the heating sensor are both located in the slot.

[0013] Beneficial effects

[0014] The threaded rod is rotated by the position adjustment component, and the rotation of the threaded rod drives the abutment rod to move in the opposite direction. When the abutment rod touches the pipe wall at the same time, the heating sensor can be placed at the optimal position. The device has a simple structure and is easy to operate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of a thermal gas flow meter proposed in the utility model;

[0017] Figure 2 for Figure 1 Cross-sectional view along the AA direction;

[0018] Figure 3 for Figure 2 An enlarged view of point B;

[0019] Figure 4 for Figure 2 Magnified view of point C.

[0020] Figure numerals: 1. central processing unit; 2. mounting tube; 3. ball valve; 4. protection probe; 5. temperature sensor; 6. heating sensor; 7. receiving groove; 8. threaded rod; 9. gear 1; 10. gear 2; 11. manual rod; 12. intermediate block; 13. moving block; 14. abutting rod; 15. pull-out mounting block; 16. elastic member. DETAILED DESCRIPTION

[0021] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and should not be construed as limiting the present invention.

[0022] Example 1

[0023] refer to Figures 1 to 4 The thermal gas flow meter described in this embodiment includes a mounting tube 2, a central processor 1 is mounted on the upper end of the mounting tube 2, a circuit board and a display screen are mounted in the central processor 1, a ball valve 3 is mounted on the mounting tube 2, a protective probe 4 is mounted on the bottom end of the mounting tube 2, a slot is opened through the protective probe 4 to facilitate airflow, a temperature sensor 5 and a heating sensor 6 are mounted in the protective probe 4, the temperature sensor 5 and the heating sensor 6 are both located in the slot, and the temperature sensor 5 and the heating sensor 6 are both electrically connected to the circuit board built into the central processor 1.

[0024] The mounting tube 2 is provided with an equal position adjustment component, which includes a receiving groove 7 provided on the mounting tube 2. The top and bottom ends of the receiving groove 7 are open and the opening faces the end away from the center of the circle. The length direction of the receiving groove 7 is consistent with the length direction of the mounting tube 2. A threaded rod 8 is rotatably installed in the receiving groove 7. The bottom end of the threaded rod 8 is a reverse symmetrical thread and the same horizontal plane as the center point of the heating sensor 6 is used as the boundary. An intermediate block 12 is installed at the boundary as a partition. A group of moving blocks 13 are respectively threadedly connected to the reverse threads at the bottom end of the threaded rod 8. A pull-out mounting block 15 is slidably installed on the end of the moving block 13 away from the heating sensor 6. An abutment rod 14 is installed on the mounting block 15 and the length direction of the abutment rod 14 is consistent with the length direction of the mounting tube 2. The two groups of abutment rods 14 are equal in length and face oppositely. An elastic member 16 is installed between the abutment rod 14 and the moving block 13 and when the elastic member 16 is freely extended, the abutment rod 14 extends out of the accommodating groove 7; a position adjustment component is also installed on the top of the threaded rod 8, and the position adjustment component includes a gear 1 9 installed on the top of the threaded rod 8. A gear 2 10 is also installed in the accommodating groove 7, and the gear 1 9 is meshed with the gear 2 10. A manual rod 11 is installed on the gear 2 10 and the manual rod 11 is coaxial with the gear 2 10. The manual rod 11 is located outside the mounting tube 2.

[0025] Working principle: pinch the pull-out mounting block 15 to hide the abutment rod 14 in the accommodating groove 7, and insert the mounting tube 2 shallowly into the pipe. When the protection probe 4 is completely in the pipe, the elastic member 16 pushes the pull-out mounting block 15 out under the action of elastic force, thereby driving the abutment rod 14 to extend out of the accommodating groove 7, and rotating the manual rod 11. The manual rod 11 drives the gear 2 10 to rotate, and the gear 2 10 drives the threaded rod 8 to rotate through the gear 1 9. The threaded rod 8 drives the two sets of moving blocks 13 away from each other. When one set of abutment rods 14 touches the pipe wall, adjust the mounting tube to move one end distance in the direction of the other set of abutment rods 14 until both sets of abutment rods 14 touch the pipe wall, so that the heating sensor 6 is in the optimal position; the protection probe 4 protects the heating sensor 6 and the temperature sensor 5 from touching the pipe.

[0026] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thermal gas flow meter comprising a mounting tube (2), a temperature sensor (5) and a heating sensor (6) being mounted at the bottom end of the mounting tube (2), characterized in that: The mounting tube (2) is provided with an equal position adjustment component, which comprises a threaded rod (8) rotatably mounted on the mounting tube (2), the bottom end of the threaded rod (8) being a reverse symmetrical thread, a group of moving blocks (13) being respectively threadedly connected to the reverse threads of the bottom end of the threaded rod (8), abutment rods (14) being mounted on the moving blocks (13), and the two groups of abutment rods (14) facing in opposite directions, the length directions of the threaded rod (8) and the abutment rods (14) being consistent with the length direction of the mounting tube (2), and a position adjustment component being mounted on the top end of the threaded rod (8).

2. The thermal gas flow meter according to claim 1, characterized in that: The mounting tube (2) is provided with a receiving groove (7), the top and bottom ends of the receiving groove (7) are open and the openings are directed toward the end away from the center of the circle, the length direction of the receiving groove (7) is consistent with the length direction of the mounting tube (2), and the threaded rod (8) is rotatably mounted in the receiving groove (7).

3. The thermal gas flow meter according to claim 2, characterized in that: A pull-out mounting block (15) is slidably mounted on one end of the moving block (13) away from the heating sensor (6); an abutting rod (14) is mounted on the pull-out mounting block (15); an elastic member (16) is mounted between the abutting rod (14) and the moving block (13); and when the elastic member (16) is freely extended, the abutting rod (14) extends out of the accommodating groove (7).

4. The thermal gas flow meter according to claim 1, wherein: The position adjustment component includes a gear 1 (9) installed at the top end of the threaded rod (8), a gear 2 (10) is also installed on the mounting tube (2), the gear 1 (9) is meshed with the gear 2 (10), a manual rod (11) is installed on the gear 2 (10), and the manual rod (11) is coaxial with the gear 2 (10), and the manual rod (11) is located outside the mounting tube (2).

5. The thermal gas flow meter according to claim 1, wherein: The reverse symmetrical threads at the bottom end of the threaded rod (8) are divided by the same horizontal plane as the center point of the heating sensor (6).

6. The thermal gas flow meter according to claim 5, characterized in that: An intermediate block (12) is installed at the boundary to serve as a partition.

7. The thermal gas flow meter according to claim 1, wherein: A protection probe (4) is installed at the bottom end of the installation tube (2). A slot is provided through the protection probe (4) to facilitate airflow. The temperature sensor (5) and the heating sensor (6) are both located in the slot.

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