Split sampling device for gas meter and gas meter

Abstract

The utility model belongs to the field of gas flow measurement, and particularly relates to a split sampling device for a gas meter and the gas meter. When a new sampling sensor is replaced, in order to ensure that data measured by the new sampling sensor is the same as actual data, the utility model provides the gas meter. The gas meter comprises a base meter shell and a sampling device, the sampling device comprises a barrel with the front end closed and a sampling sensor, a jacking protrusion is arranged in the barrel, the axial inner wall of the barrel is in jacking contact with the front end of the sampling sensor, and the jacking protrusion and the circumferential inner wall of the barrel are in jacking contact with the left side and the right side of the sampling sensor respectively; a mounting frame is detachably mounted on the base meter shell in a limiting mode, and the front side of the mounting frame and the rear side of the barrel are provided with a limiting hole and a limiting pin which are matched with each other respectively. The sampling device is the split sampling device for the gas meter disclosed by the utility model. And the relative position of the sampling sensor and the substrate shell is limited, so that deviation between data measured by a new sampling sensor and actual data is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of gas flow measurement, in particular to a split sampling device for a gas meter and a gas meter. Background Art

[0002] A diaphragm gas meter is a meter used to measure gas flow. In a diaphragm gas meter, a magnetic transmission component converts the gas flow signal into a magnetic signal, and a sampling device converts the magnetic signal into an electrical signal, which can be transmitted to other electrical components via wires.

[0003] For example, a Chinese invention patent with authorization publication number CN104075762B and an authorization publication date of October 27, 2017, discloses a flow sampling device for an electronic temperature-corrected diaphragm gas meter. The flow sampling device includes a sealing sleeve and a sampling sensor. The sealing sleeve is a cylinder with one end closed. The sampling sensor is eccentrically mounted within the inner cavity of the cylindrical head via a mounting bracket. The sealing sleeve, sampling sensor, and mounting bracket constitute a sampling device for converting magnetic signals into electrical signals. A radial flange is provided on the outer circumference of the sealed end of the sealing sleeve.

[0004] However, after the flow sampling device is applied to a diaphragm gas meter, the sealed end of the sealing sleeve is located inside the base meter housing, which is provided with a mounting hole. The open end of the sealing sleeve extends through the mounting hole, and the inner diameter of the mounting hole is smaller than the outer diameter of the radial flange. When the sampling sensor is damaged, the base meter housing must be opened to replace the new sampling device, which is cumbersome. Furthermore, there is no guarantee that the position of the sampling sensor in the new sampling device is exactly the same as the position of the sampling sensor in the old sampling device. As a result, the initial magnetic field at the location of the new sampling sensor is different from the magnetic field at the location of the old sampling sensor, resulting in a deviation between the data measured by the new sampling sensor and the actual data. Utility Model Content

[0005] The purpose of the utility model is to provide a gas meter to solve the technical problem that when replacing the sampling device, it is impossible to ensure that the position of the new sampling sensor is completely consistent with the old sampling sensor, thereby causing the data measured by the new sampling sensor to deviate from the actual data.

[0006] The purpose of the present utility model is also to provide a split sampling device for a gas meter, so as to solve the same technical problems mentioned above after being applied to the gas meter.

[0007] To achieve the above-mentioned purpose, the technical solution of the gas meter provided by the present utility model is:

[0008] A gas meter comprises a base meter housing and a sampling device, the sampling device comprising a cylinder with a closed front end and a sampling sensor installed in the cylinder, the base meter housing is provided with an avoidance through hole for avoiding the cylinder, the cylinder is provided with a sensor limiting structure for limiting the sampling sensor, the sensor limiting structure comprises an axial inner wall of the cylinder and a pressing protrusion arranged on the circumferential inner wall of the cylinder, the axial inner wall is in pressing contact with the front end of the sampling sensor to limit the front and rear positions of the sampling sensor, the pressing protrusion and the circumferential inner wall are in pressing contact with the left and right sides of the sampling sensor respectively to limit the left and right positions of the sampling sensor; a mounting bracket is detachably mounted on the base meter housing, the front side of the mounting bracket and the rear side of the cylinder are respectively provided with limiting holes and limiting pins that cooperate with each other to limit the relative position of the cylinder and the base meter housing.

[0009] Furthermore, the rear end of the cylinder is located behind the avoidance through hole, the rear end of the cylinder is provided with an outward-turned folding edge, and the limiting hole or the limiting pin is provided on the rear side of the outward-turned folding edge.

[0010] Furthermore, a radial protrusion is provided on the outer peripheral surface of the rear side of the cylinder, the radial protrusion is located behind the avoidance through hole, and the limiting hole or the limiting pin is provided on the rear side of the radial protrusion.

[0011] Furthermore, a limiting hole or a limiting pin is provided on the rear end surface of the cylinder.

[0012] Furthermore, anti-rotation protrusions are provided on both the upper and lower sides of the pressing protrusion, and the pressing protrusion and all the anti-rotation protrusions are in pressing contact with the left side of the sampling sensor.

[0013] Furthermore, anti-rotation protrusions are provided on the upper and lower sides of the pressing protrusion, respectively contacting the upper and lower sides of the sampling sensor with pressing force.

[0014] The gas meter provided by the present invention has the following beneficial effects: The present invention is an improved invention. When replacing the sampling device, the relative position of the cylinder and the base shell is limited by the limit pin and the limit hole, and the relative position of the sampling sensor and the cylinder is limited by the axial inner wall, the top pressure protrusion, and the circumferential inner wall. Thus, the relative position of the sampling sensor and the base shell is limited, ensuring that the positions of the new and old sampling sensors are consistent, thereby avoiding deviations between the data measured by the new sampling sensor and the actual data.

[0015] To achieve the above-mentioned purpose, the technical solution of the split sampling device for gas meter provided by the present utility model is:

[0016] A split sampling device for a gas meter comprises a cylinder with a closed front end and a sampling sensor installed in the cylinder. A sensor limiting structure for limiting the sampling sensor is provided in the cylinder. The sensor limiting structure comprises an axial inner wall of the cylinder and a pressing protrusion provided on the circumferential inner wall of the cylinder. The axial inner wall is in pressing contact with the front end of the sampling sensor to limit the front and rear position of the sampling sensor. The pressing protrusion and the circumferential inner wall are in pressing contact with the left and right sides of the sampling sensor respectively to limit the left and right position of the sampling sensor. A limiting pin or a limiting hole is provided on the rear side of the cylinder for cooperating with a limiting hole or a limiting pin on a mounting frame.

[0017] Furthermore, the rear end of the cylinder is provided with an outward folding edge, and a limiting hole or a limiting pin is arranged on the rear side of the outward folding edge; or, a radial protrusion is provided on the outer peripheral surface of the rear side of the cylinder, and a limiting hole or a limiting pin is arranged on the rear side of the radial protrusion.

[0018] Furthermore, anti-rotation protrusions are provided on both the upper and lower sides of the pressing protrusion; the pressing protrusion and all the anti-rotation protrusions are in pressing contact with the left side of the sampling sensor, or the anti-rotation protrusions are in pressing contact with the upper and lower sides of the sampling sensor.

[0019] Furthermore, the cylinder is also filled with waterproof filler.

[0020] The utility model provides a split sampling device for a gas meter with the following beneficial effects: This utility model is a pioneering invention. The axial inner wall, the top pressure protrusion, and the circumferential inner wall are used to limit the relative position of the sampling sensor and the barrel. When replacing the split sampling device for a gas meter, the limit pin cooperates with the limit hole to limit the relative position of the barrel and the base shell, that is, to limit the relative position of the sampling sensor and the base shell, ensuring that the positions of the new and old sampling sensors are consistent, thereby avoiding deviations between the data measured by the new sampling sensor and the actual data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a partial structural diagram of a specific embodiment 1 of the gas meter of the present utility model;

[0022] Figure 2 for Figure 1 A top view of the middle mounting frame;

[0023] Figure 3 for Figure 2 AA view;

[0024] Figure 4 for Figure 1 Top view of the split sampling device for gas meters;

[0025] Figure 5 for Figure 4 BB view;

[0026] Figure 6 This is a top view of a split sampling device for a gas meter in a specific embodiment 2 of the gas meter of the present utility model;

[0027] Figure 7 This is a top view of a split sampling device for a gas meter in a specific embodiment 3 of the gas meter of the present utility model;

[0028] Figure 8 This is a structural explosion diagram of a gas meter in the prior art.

[0029] Description of reference numerals:

[0030] 1. Sampling device; 11. Anti-rotation protrusion; 12. Pressing protrusion; 13. Cylinder; 14. Sampling sensor; 15. Outward folding edge; 16. Limit pin; 17. Waterproof filler; 2. Base meter housing; 21. Avoidance hole; 3. Mounting bracket. DETAILED DESCRIPTION

[0031] In order to solve the problems in the background technology, the core inventive concept of the present invention is: on the one hand, limiting the relative position of the cylinder and the base shell, on the other hand, limiting the relative position of the sampling sensor and the cylinder, thereby ensuring that the new and old sampling sensors are located in the same magnetic field.

[0032] The present invention is further described in detail below with reference to the embodiments.

[0033] Specific embodiment 1 of the gas meter provided by the utility model:

[0034] like Figure 1-5 As shown, the gas meter includes a base meter housing 2 and a sampling device 1. The sampling device 1 includes a cylinder 13 with a closed front end and a sampling sensor 14 installed in the cylinder 13. The base meter housing 2 is provided with an avoidance through hole 21 for avoiding the cylinder 13. The cylinder 13 is provided with a sensor limiting structure for limiting the sampling sensor 14. The sensor limiting structure includes an axial inner wall of the cylinder 13 and a pressing protrusion 12 provided on the circumferential inner wall of the cylinder 13. The axial inner wall is in pressing contact with the front end of the sampling sensor 14 to limit the front and rear position of the sampling sensor 14. The pressing protrusion 12 and the circumferential inner wall are in pressing contact with the left and right sides of the sampling sensor 14 respectively to limit the left and right position of the sampling sensor 14; a mounting bracket 3 is detachably mounted on the base meter housing 2, and a front side of the mounting bracket 3 and a rear side of the cylinder 13 are respectively provided with mutually cooperating limiting holes and limiting pins 16 to limit the relative position of the cylinder 13 and the base meter housing 2.

[0035] The cylinder 13 , the sampling sensor 14 , the sensor limiting structure and the limiting pin 16 constitute the sampling device 1 , or the cylinder 13 , the sampling sensor 14 , the sensor limiting structure and the limiting hole constitute the sampling device 1 .

[0036] It should be noted that in the prior art, the diaphragm gas meter itself has a mounting bracket 3, which is fixedly mounted on the base meter housing 2, and is used to fix other structures. For example, the Chinese utility model patent with authorization announcement number CN208621115U and authorization announcement date of March 19, 2019, discloses a diaphragm gas meter modification device, such as Figure 8 As shown, in the prior art, the mounting bracket 3 is mounted on the base meter housing 2. The main difference between the mounting bracket 3 in the present invention and the prior art mounting bracket 3 is that a limiting hole or limiting pin 16 is provided on the mounting bracket 3 in the present invention.

[0037] In actual use, the sampling device 1 and the mounting bracket 3 in the present invention can be used to transform the old meter. After the transformation is completed, only the sampling device 1 needs to be replaced regularly. Of course, the gas meter in the present invention can also be directly used to replace the old gas meter.

[0038] When replacing the sampling device 1, the limiting pin 16 and the limiting hole are used to limit the relative position of the cylinder 13 and the base shell, and the axial inner wall, the top pressure protrusion 12 and the circumferential inner wall are used to limit the relative position of the sampling sensor 14 and the cylinder 13, thereby limiting the relative position of the sampling sensor 14 and the base shell, ensuring that the positions of the new and old sampling sensors are consistent, and avoiding deviations between the data measured by the new sampling sensor and the actual data.

[0039] As a specific implementation method, Figure 1-5 As shown, compared with the flow sampling device 1 in the Chinese invention patent with authorization announcement number CN104075762B, in this specific embodiment, the front end of the cylinder 13 does not have a radial flange, and there is no need to open the base shell 2 when replacing the sampling device 1, which is convenient to operate.

[0040] However, in other specific embodiments, reference Figure 1-5 According to the Chinese invention patent with authorization announcement number CN104075762B, a radial flange may also be provided at the front end of the cylinder 13 .

[0041] In this embodiment, if Figure 1-5 As shown, as a specific embodiment, the rear end of the cylinder 13 is located behind the avoidance through hole 21, the rear end of the cylinder 13 is provided with an outward folding edge 15, the limit pin 16 is arranged on the rear side of the outward folding edge 15, and the limit hole is arranged on the front side of the mounting frame 3, and the structure is simple.

[0042] In other embodiments, refer to Figure 1-5 As shown, the limiting hole can also be set on the outward-turned folded edge 15, and the limiting pin 16 is set on the front side of the mounting bracket 3.

[0043] In other embodiments, refer to Figure 1-5As shown, the rear end of the cylinder 13 is located behind the avoidance through hole 21, and a radial protrusion is provided on the outer peripheral surface of the rear side of the cylinder 13, the radial protrusion is located behind the avoidance through hole 21, the limit hole is set on the rear side of the radial protrusion, and the limit pin 16 is set on the front side of the mounting bracket 3; or, the limit pin 16 is set on the rear side of the radial protrusion, and the limit hole is set on the front side of the mounting bracket 3.

[0044] In this embodiment, if Figure 1-5 As shown, in order to better limit the left and right positions of the sampling sensor 14, anti-rotation protrusions 11 are provided on the upper and lower sides of the pressing protrusion 12. The pressing protrusion 12 and all the anti-rotation protrusions 11 are in pressing contact with the left side of the sampling sensor 14, thereby better ensuring that the sampling sensor 14 is in a set posture and ensuring that the sampling sensors 14 in each sampling device 1 are located at the same position in the cylinder 13.

[0045] However, in other specific embodiments, reference Figure 1-5 As shown, the anti-rotation protrusion 11 may not be provided, and the pressing area of the pressing protrusion 12 pressing the sampling sensor 14 may be increased, thereby ensuring that the sampling sensor 14 is in a set posture.

[0046] It should be specially noted that, in the gas meter of the present invention, after the sampling device 1 is damaged, only the sampling device 1 needs to be replaced, and the base meter housing 2 and the mounting bracket 3 do not need to be replaced.

[0047] like Figure 1-7 As shown, in the sampling device 1, as a specific embodiment, the cylinder 13 is also filled with a waterproof filler 17 to prevent water vapor from entering the cylinder 13. At the same time, the waterproof filler 17 can further limit the position of the sampling sensor 14. However, in other specific embodiments, refer to Figure 1-7 As shown, the barrel 13 may not be filled with the waterproof filler 17. In this case, the sampling sensor 14 needs to have waterproof performance.

[0048] Specific embodiment 2 of the gas meter provided by the utility model:

[0049] The purpose of this embodiment is to provide a gas meter with different anti-rotation protrusions.

[0050] The main difference between this embodiment and specific embodiment 1 is that: Figure 4 As shown, in the specific embodiment 1, the pressing protrusion 12 and all the anti-rotation protrusions 11 are in pressing contact with the left side of the sampling sensor 14; and in this embodiment, as shown Figure 6 As shown, the upper and lower sides of the pressing protrusion 12 are provided with anti-rotation protrusions 11 which respectively press against the upper and lower sides of the sampling sensor 14 , that is, the pressing protrusion 12 presses against the upper and lower sides of the sampling sensor 14 .

[0051] Specific embodiment 3 of the gas meter provided by the utility model:

[0052] The purpose of this embodiment is to provide a gas meter with different setting positions of the limit pins.

[0053] The main difference between this embodiment and specific embodiment 1 is that: Figure 4 As shown in the specific embodiment 1, the thickness of the cylinder 13 is relatively thin, and the limit pin 16 is located at the rear side of the outward folding edge 15; Figure 7 As shown, as a specific embodiment, the thickness of the cylinder 13 is relatively thick, the limiting pin 16 is provided on the rear end surface of the cylinder 13 , and the limiting hole is provided on the front end surface of the mounting bracket 3 .

[0054] In other embodiments, refer to Figure 7 As shown, the limiting hole is provided on the rear end surface of the cylinder 13 , and the limiting pin 16 is provided on the front end of the mounting bracket 3 .

[0055] Specific embodiments of the split sampling device for gas meters provided by the utility model include:

[0056] Reference Figure 1-7 As shown, the specific structure of the split sampling device for the gas meter in this embodiment is the same as the specific structure of any sampling device 1 in the specific embodiments of the gas meter of the present utility model, and will not be repeated here.

[0057] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A gas meter comprising a base housing and a sampling device, wherein the sampling device comprises a cylinder with a closed front end and a sampling sensor installed in the cylinder, characterized in that: The base watch shell is provided with an avoidance through hole for avoiding the cylinder, and the cylinder is provided with a sensor limiting structure for limiting the sampling sensor. The sensor limiting structure includes an axial inner wall of the cylinder and a top pressure protrusion arranged on the circumferential inner wall of the cylinder. The axial inner wall is in top pressure contact with the front end of the sampling sensor to limit the front and rear positions of the sampling sensor. The top pressure protrusion and the circumferential inner wall are in top pressure contact with the left and right sides of the sampling sensor respectively to limit the left and right positions of the sampling sensor; a mounting bracket is detachably installed on the base watch shell, and the front side of the mounting bracket and the rear side of the cylinder are respectively provided with matching limiting holes and limiting pins to limit the relative position of the cylinder and the base watch shell.

2. The gas meter according to claim 1, wherein: The rear end of the cylinder is located behind the avoidance through hole, the rear end of the cylinder is provided with an outward folding edge, and the limiting hole or the limiting pin is arranged on the rear side of the outward folding edge.

3. The gas meter according to claim 1, wherein: A radial protrusion is provided on the outer peripheral surface of the rear side of the cylinder body, the radial protrusion is located behind the avoidance through hole, and the limiting hole or the limiting pin is arranged on the rear side of the radial protrusion.

4. The gas meter according to claim 1, wherein: The limiting hole or the limiting pin is arranged on the rear end surface of the cylinder.

5. The gas meter according to any one of claims 1 to 4, characterized in that: Anti-rotation protrusions are provided on both the upper and lower sides of the pressing protrusion, and the pressing protrusion and all the anti-rotation protrusions are in pressing contact with the left side of the sampling sensor.

6. The gas meter according to any one of claims 1 to 4, characterized in that: The upper and lower sides of the pressing protrusion are provided with anti-rotation protrusions which are respectively in pressing contact with the upper and lower sides of the sampling sensor.

7. A split sampling device for a gas meter, comprising a cylinder with a closed front end and a sampling sensor installed in the cylinder, characterized in that: A sensor limiting structure for limiting the position of the sampling sensor is provided in the cylinder. The sensor limiting structure includes an axial inner wall of the cylinder and a pressing protrusion arranged on the circumferential inner wall of the cylinder. The axial inner wall is in pressing contact with the front end of the sampling sensor to limit the front and rear positions of the sampling sensor. The pressing protrusion and the circumferential inner wall are in pressing contact with the left and right sides of the sampling sensor respectively to limit the left and right positions of the sampling sensor. A limiting pin or limiting hole is provided on the rear side of the cylinder for cooperating with the limiting hole or limiting pin on the mounting bracket.

8. The split sampling device for a gas meter according to claim 7, characterized in that: The rear end of the cylinder is provided with an outward folding edge, and a limiting hole or a limiting pin is arranged on the rear side of the outward folding edge; or, a radial protrusion is provided on the outer peripheral surface of the rear side of the cylinder, and a limiting hole or a limiting pin is arranged on the rear side of the radial protrusion.

9. The split sampling device for a gas meter according to claim 7 or 8, characterized in that: The upper and lower sides of the pressing protrusion are provided with anti-rotation protrusions; the pressing protrusion and all the anti-rotation protrusions are in pressing contact with the left side of the sampling sensor, or the anti-rotation protrusion is in pressing contact with the upper and lower sides of the sampling sensor.

10. The split sampling device for a gas meter according to claim 7 or 8, characterized in that: The cylinder is also filled with waterproof filler.

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