Single-display film type gas meter with micro-flow metering function

Abstract

The utility model relates to a single-display diaphragm type gas meter with micro-flow metering. The single-display diaphragm type gas meter comprises a gas meter main body, and a driving gear, an adjusting gear, a first gear, a transmission gear, a transition gear and a sampling gear which are arranged in the gas meter main body, wherein the driving gear is connected with an internal machine core of the gas meter main body, and the adjusting gear is meshed with the driving gear, so that the driving gear rotates to drive the adjusting gear to transmit to the first gear, the first gear transmits to the transition gear through the transmission gear, and the transition gear is meshed with the sampling gear assembled on the gas meter main body; the sampling gear is driven to rotate to realize mechanical flow metering of the counter; the gas meter electro-mechanical conversion sensor is simple in structure, high-precision sampling and counting are achieved through cooperation of the Hall element and the magnetic steel, accuracy and reliability of gas meter electro-mechanical conversion are improved, and meanwhile the gas meter electro-mechanical conversion sensor is simple in structure and easy to manufacture and install and has wide application prospects and market prospects.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas meters, in particular to a single-display membrane gas meter with micro-flow measurement. Background Art

[0002] With the increase in gas consumption and the improvement in metering accuracy, higher requirements are placed on the metering performance of diaphragm gas meters at low flow rates. However, traditional diaphragm gas meters have problems such as low metering accuracy and poor anti-interference ability at low flow rates. In the case of leakage in the meter at low flow rates, there is no alarm valve closing function, which cannot meet the needs of modern gas metering.

[0003] Traditional gas meters usually contain a counter to record and display gas flow. However, as a mechanical component, the counter may suffer from wear and error after long-term use, affecting the measurement accuracy. In addition, the existence of the counter also increases the complexity and cost of the gas meter, which brings inconvenience to its use.

[0004] In view of the above problems, it is necessary to improve them. Utility Model Content

[0005] The utility model aims to provide a single-display diaphragm gas meter with micro-flow measurement, which has simple structure, ingenious design and optimized sampling precision and counting accuracy.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is: a single-display diaphragm gas meter with micro-flow measurement, including a gas meter body, an active gear arranged in the gas meter body, an adjustment gear, a first gear, a transmission gear, a transition gear and a sampling gear; wherein the adjustment gear is meshed with the first gear, the active gear is connected with the internal movement of the gas meter body, the adjustment gear is meshed with the active gear, so that the active gear rotates to drive the adjustment gear to the first gear, the first gear is transmitted to the transition gear through the transmission gear, the transition gear is meshed with the sampling gear assembled on the gas meter body, and drives the rotation of the sampling gear to realize the mechanical flow measurement of the counter.

[0007] As a preferred solution of the utility model, the adjustment gear comprises a large adjustment gear and a small adjustment gear which are coaxially arranged; the large adjustment gear is meshed with the driving gear, and the small adjustment gear is meshed with the first gear.

[0008] As a preferred solution of the utility model, the transmission gear includes a large gear and a small gear arranged coaxially, the large gear is meshed with the transition gear for transmission, and the small gear is meshed with the first gear for transmission.

[0009] As a preferred solution of the utility model, the transition gear comprises a large transition wheel and a small transition wheel which are coaxially arranged; wherein the large transition wheel is meshed with the sampling gear, and the small transition wheel is meshed with the large gear.

[0010] As a preferred solution of the utility model, a positioning plate is fixedly provided on the sampling gear, and two positioning grooves for placing magnetic steel are fixedly provided on the positioning plate, and the two positioning grooves are symmetrically arranged.

[0011] As a preferred solution of the utility model, the positioning groove is vertically arranged on the positioning plate, and the positioning groove includes a sleeve and an elastic abutment; the sleeve has a guide notch; the elastic abutment is fixed on the positioning plate and assembled at the guide notch of the sleeve.

[0012] As a preferred solution of the utility model, the outer end of the elastic abutment member and the outer end of the positioning plate are in the same vertical plane.

[0013] As a preferred solution of the utility model, a locking block is fixedly provided on the top of the elastic abutment member, and the locking block is located at the top of the positioning groove to lock the magnetic steel.

[0014] As a preferred solution of the utility model, the elastic abutment member further comprises a guiding inclined surface, and the guiding inclined surface is located at an end of the locking block relatively close to the positioning groove.

[0015] As a preferred solution of the utility model, the top of the sleeve has an arc-shaped guide surface that gradually shrinks along the magnetic steel insertion direction, and the arc-shaped guide surface is arranged opposite to the guide inclined surface.

[0016] As a preferred solution of the utility model, a main control board is also arranged on the main body of the gas meter, and the main control board is provided with a sampling sensor.

[0017] As a preferred solution of the present invention, the sampling sensor is a Hall element.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model has a simple structure and adopts the combination of Hall elements and magnetic steel to achieve high-precision sampling and counting, thereby improving the accuracy and reliability of the electromechanical conversion of the gas meter. At the same time, the utility model has a simple structure, is easy to manufacture and install, and has broad application prospects and market prospects.

[0020] 2. The utility model is cleverly designed. Two magnets are arranged on the sampling gear. 3mm above the two magnets is a main control board with a Hall sensor. The sampling gears of the two magnets rotate around the Hall to generate signals for sampling to achieve a micro-flow function of 0.2L. Since the micro-flow single-display membrane gas meter has no counter, the counter can be installed during the factory error measurement test and can be removed after the test is completed, or the flow coefficient k value can be set in the main control board program to adjust the meter error through the program.

[0021] 3. The utility model provides a positioning groove for placing magnetic steel, which facilitates the automatic loading of the magnetic steel, and can meet the needs of mass production of IoT smart gas meters by simply pressing the magnetic steel into the positioning groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of multiple gear transmission connections in an embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the connection between the adjusting gear, the driving gear and the first gear in the embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the transmission gear in the embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the transition gear in the embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the sampling gear in the embodiment of the utility model;

[0029] Figure 8 For the utility model embodiment Figure 7 A partial enlarged view of the A direction;

[0030] Explanation of the accompanying drawings: gas meter body 1, driving gear 2, positioning plate 3, first gear 4, positioning groove 5, magnetic steel 6, sampling gear 7, sampling sensor 8, main control board 9, transition gear 10, large transition wheel 11, small transition wheel 12, transmission gear 20, large gear 21, small gear 22, adjustment gear 30, large adjustment gear 31, small adjustment gear 32, guide notch 50, sleeve 51, elastic abutment 52, locking block 53, guide slope 54, arc guide surface 55. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example:

[0034] like Figure 1-6 As shown, Figure 1 This is the gear transmission structure diagram of the utility model high-precision sampling gas meter; Figure 2 This is the main view of the high-precision sampling gas meter of the utility model; Figure 3 This is a structural exploded diagram of the high-precision sampling gas meter of the utility model.

[0035] As technology matures, customers have higher requirements for the accuracy of gas meters. Therefore, single-display diaphragm gas meters with micro-flow measurement are needed to improve the accuracy and reliability of electromechanical conversion;

[0036] Specifically, a single-display diaphragm gas meter with micro-flow measurement includes a gas meter body 1, an active gear 2 arranged in the gas meter body 1, an adjustment gear 30, a first gear 4, a transmission gear 20, a transition gear 10 and a sampling gear 7; wherein the adjustment gear 30 is meshed with the first gear 4, the active gear 2 is connected to the internal movement of the gas meter body 1, and the adjustment gear 30 is meshed with the active gear 2, so that the active gear 2 rotates to drive the adjustment gear 30 to be transmitted to the first gear 4, and the first gear 4 is transmitted to the transition gear 10 through the transmission gear 20, and the transition gear 10 is meshed with the sampling gear 7 assembled on the gas meter body 1, driving the rotation of the sampling gear 7 to realize the mechanical flow measurement of the counter; the utility model has a simple structure, adopts the combination of Hall elements and magnetic steel, realizes high-precision sampling and counting, and improves the accuracy and reliability of the electromechanical conversion of the gas meter. At the same time, the utility model has a simple structure, is easy to manufacture and install, and has broad application prospects and market prospects.

[0037] Specifically, the adjustment gear 30 includes a large adjustment gear 31 and a small adjustment gear 32 arranged coaxially; the large adjustment gear 31 is meshed with the driving gear 2, and the small adjustment gear 32 is meshed with the first gear 4; in this embodiment, the number of teeth of the large adjustment gear 31 is 50, and the number of teeth of the small adjustment gear 32 is 40.

[0038] The transmission gear 20 includes a coaxially arranged large gear 21 and a small gear 22. The large gear 21 is meshed with the transition gear 10 for transmission, and the small gear 22 is meshed with the first gear 4 for transmission. In this embodiment, the number of teeth of the large gear 21 is 30, and the number of teeth of the small gear 22 is 20.

[0039] The transition gear 10 includes a large transition wheel 11 and a small transition wheel 12 which are coaxially arranged; wherein the large transition wheel 11 is meshed with the sampling gear 7, and the small transition wheel 12 is meshed with the large gear 21; in this embodiment, the number of teeth of the large transition wheel 11 is 50, and the number of teeth of the small transition wheel 12 is 10.

[0040] In this embodiment, the number of teeth of the first gear 4 is 23, and the number of teeth of the sampling gear 7 is 20; Figure 3 , the utility model patent structure of the small flow single display membrane gas meter base assembly schematic diagram, according to the gear ratio formula i = driven gear teeth / driving gear teeth number calculated: (50 × 23 × 20 × 10 × 20) / (10 × 40 × 23 × 30 × 50) = 1 / 3, the membrane gas meter rotation volume is 1.2dm3 or 1.2L, so the small flow accuracy is (1.2L × 1 / 3) / 2 = 0.2L, (Note: when the small flow is divided by 2, because the number of teeth of the last sampling gear 7 is 20, the sampling gear 7 is provided with two magnetic steels 6, such as Figure 7 As shown, it is equivalent to sampling twice per revolution)

[0041] like Figure 7-8 As shown, Figure 7 This is a schematic diagram of the structure of the sampling gear in the embodiment of the utility model; Figure 8 For the utility model embodiment Figure 7 A partial enlarged view of the A direction; wherein, a positioning plate 3 is fixedly provided on the sampling gear 7, and two positioning grooves 5 for placing magnetic steels 6 are fixedly provided on the positioning plate 3, and the two positioning grooves 5 are symmetrically arranged; the sampling gear 7 drives the two magnetic steels 6 to rotate, and the two magnetic steels are sensed by the Hall sensor to realize dual sampling of the counter and the Hall sensor, which has the advantages of simple and firm structure, small size, light weight and low power consumption; the Hall sensor senses the counting of the two magnetic steels, reduces the measurement error, makes the measurement accurate and the performance stable and reliable.

[0042] The positioning groove 5 is vertically arranged on the positioning plate 3, and the positioning groove 5 includes a sleeve 51 and an elastic abutment 52; the sleeve 51 has a guide notch 50; the elastic abutment 52 is fixed on the positioning plate 3 and assembled at the guide notch 50 of the sleeve 51; the utility model is provided with a positioning groove for placing magnetic steel, which is convenient for automatic loading of magnetic steel, and only needs to press the magnetic steel into the positioning groove to meet the mass production needs of IoT smart gas meters.

[0043] The outer end of the elastic abutment 52 is in the same vertical plane as the outer end of the positioning plate 3; a locking block 53 is fixedly provided on the top of the elastic abutment 52, and the locking block 53 is located at the top of the positioning groove 5 to lock the magnet 6; in this example, a locking block 53 is fixedly provided on the top of the elastic abutment 52 to prevent the magnet from escaping from the positioning groove 5.

[0044] The elastic abutment 52 also includes a guide bevel 54, which is located at one end of the locking block 53 relatively close to the positioning groove 5. The top of the sleeve 51 has an arc-shaped guide surface 55 that gradually shrinks along the insertion direction of the magnetic steel 6. The arc-shaped guide surface 55 is arranged opposite to the guide bevel 54. By setting the guide bevel 54 and the arc-shaped guide surface 55, a guide is provided for the assembly of the magnetic steel 6.

[0045] A main control board 9 is also provided on the gas meter body 1, and the main control board 9 is provided with a sampling sensor 8; the sampling sensor 8 is a Hall element, and the Hall element will sense the change of the strength of the magnetic field, thereby outputting a corresponding electrical signal; the utility model is cleverly designed, and two magnets are provided on the sampling gear, and 3mm above the two magnets is a main control board with a Hall sensor, and the sampling gears of the two magnets rotate around the Hall to generate a signal for sampling to achieve a micro-flow function of 0.2L, and the micro-flow has a cumulative amount counting function, and the real-time metering data changes and the accumulated amount of metering data can be observed through the LCD display on the main control board, and in the state of micro-flow leakage in the 0.2L / pul meter, the system will close the valve according to the program setting according to the autonomous alarm function, so there is no need for a counter to count, and since the micro-flow single-display membrane gas meter has no counter, the counter can be installed during the factory error metering detection, and the counter can be removed after the detection is completed, or the flow coefficient k value can be set in the main control board program to adjust the meter error through the program.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention; various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0047] Although this article uses more of the figure marks in the figures: gas meter body 1, driving gear 2, positioning plate 3, first gear 4, positioning groove 5, magnetic steel 6, sampling gear 7, sampling sensor 8, main control board 9, transition gear 10, large transition wheel 11, small transition wheel 12, transmission gear 20, large gear 21, small gear 22, adjustment gear 30, large adjustment gear 31, small adjustment gear 32, guide notch 50, sleeve 51, elastic abutment 52, locking block 53, guide bevel 54, arc guide surface 55 and other terms, but does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. Single-display diaphragm gas meter with micro-flow measurement, characterized by: The invention comprises a gas meter body (1), a driving gear (2) arranged in the gas meter body (1), an adjusting gear (30), a first gear (4), a transmission gear (20), a transition gear (10) and a sampling gear (7); wherein the adjusting gear (30) meshes with the first gear (4); the driving gear (2) is connected to the internal movement of the gas meter body (1); the adjusting gear (30) meshes with the driving gear (2); the driving gear (2) rotates to drive the adjusting gear (30) to the first gear (4); the first gear (4) is transmitted to the transition gear (10) through the transmission gear (20); the transition gear (10) meshes with the sampling gear (7) mounted on the gas meter body (1); the sampling gear (7) is driven to rotate to realize mechanical flow measurement of the counter.

2. The single-display diaphragm gas meter with micro-flow measurement according to claim 1 is characterized in that: The adjustment gear (30) comprises a large adjustment gear (31) and a small adjustment gear (32) which are coaxially arranged; the large adjustment gear (31) meshes with the driving gear (2), and the small adjustment gear (32) meshes with the first gear (4).

3. The single-display diaphragm gas meter with micro-flow measurement according to claim 1 is characterized in that: The transmission gear (20) comprises a large gear (21) and a small gear (22) which are coaxially arranged; the large gear (21) is meshed with the transition gear (10) for transmission, and the small gear (22) is meshed with the first gear (4) for transmission.

4. The single-display diaphragm gas meter with micro-flow measurement according to claim 1 is characterized in that: The transition gear (10) comprises a large transition wheel (11) and a small transition wheel (12) which are coaxially arranged; wherein the large transition wheel (11) meshes with the sampling gear (7), and the small transition wheel (12) meshes with the large gear (21).

5. The single-display diaphragm gas meter with micro-flow measurement according to claim 1 is characterized in that: A positioning plate (3) is fixedly provided on the sampling gear (7), and two positioning grooves (5) for placing magnetic steel (6) are fixedly provided on the positioning plate (3), and the two positioning grooves (5) are symmetrically arranged.

6. The single-display diaphragm gas meter with micro-flow measurement according to claim 5 is characterized in that: The positioning groove (5) comprises a sleeve (51) and an elastic abutment member (52); the sleeve (51) has a guide notch (50); the elastic abutment member (52) is fixedly arranged on the positioning plate (3) and assembled at the guide notch (50) of the sleeve (51).

7. The single-display diaphragm gas meter with micro-flow measurement according to claim 6 is characterized in that: The outer end of the elastic abutment member (52) and the outer end of the positioning plate (3) are in the same vertical plane.

8. The single-display diaphragm gas meter with micro-flow measurement according to claim 6, characterized in that: A locking block (53) is fixedly provided on the top of the elastic abutment member (52). The locking block (53) is located on the top of the positioning groove (5) and is used to lock the magnetic steel (6).

9. The single-display diaphragm gas meter with micro-flow measurement according to claim 6, characterized in that: The elastic abutment member (52) further comprises a guiding inclined surface (54), wherein the guiding inclined surface (54) is located at an end of the locking block (53) relatively close to the positioning groove (5).

10. The single-display diaphragm gas meter with micro-flow measurement according to claim 6, characterized in that: The top of the sleeve (51) has an arc-shaped guide surface (55) that gradually shrinks along the insertion direction of the magnetic steel (6), and the arc-shaped guide surface (55) is arranged opposite to the guide inclined surface (54).

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