Gas meter with micro-flow sampling module

Abstract

The utility model discloses a gas meter with a micro-flow sampling module. The vertical gear is installed on the support, the large magnetic ring assembly is installed on the shell, the shifting fork is installed on the large magnetic ring assembly, and the limiting structure is arranged on the vertical gear, plays a role in limiting and connecting the position of the large magnetic ring assembly and prevents the large magnetic ring assembly from shaking to affect accurate flow counting. Through the arrangement of the limiting structure, the position of the large magnetic ring assembly installed on the shell is limited, and meanwhile, the shifting fork on the large magnetic ring assembly is connected with the vertical gear in a limiting mode, so that the shifting fork and the vertical gear can act synchronously during rotation, the idling phenomenon cannot occur, the large magnetic ring assembly cannot shake, and the service life of the vertical gear is prolonged. Therefore, accurate counting of flow cannot be affected by shaking and idling of the large magnetic ring assembly.

Description

Technical Field

[0001] This utility model relates to gas meters, specifically a gas meter with a micro-flow sampling module. Background Technology

[0002] In existing technologies, the large magnetic ring assembly in gas meters is usually mounted on the housing by attaching a small magnetic ring to the large magnetic ring assembly and then magnetically limiting it. However, in order to accurately sample and count minute flow rates, a magnetic metering sensor for sampling and counting minute flow rates is installed at the large magnetic ring. By detecting the change in the magnetic field when the large magnetic ring rotates, a pulse signal is output. This pulse signal is then converted into gas volume. If the small magnetic ring is not installed, the large magnetic ring will shake. Once the large magnetic ring shakes, false pulses will be generated, which will affect the accurate counting of minute flow rates. Over long-term use, this will result in a large error.

[0003] Furthermore, in existing technologies, the vertical gear in the movement typically has a protrusion on it and a pusher on the shift fork to drive the rotation of the shift fork and large magnetic ring. When the vertical gear rotates, the shift fork only rotates after the protrusion contacts the pusher. During this process, when the protrusion is not in contact with the pusher, the shift fork and vertical gear do not rotate synchronously, resulting in an idling phase and inaccurate flow rate counting. Therefore, a gas meter with a micro-flow rate sampling module is proposed. Utility Model Content

[0004] The purpose of this invention is to solve the above problems by proposing a gas meter with a micro-flow sampling module.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas meter with a micro-flow sampling module, comprising a housing, a movement installed inside the housing, and a bracket installed on the movement; characterized in that it further comprises a vertical gear installed on the bracket, a large magnetic ring assembly rotating on the housing, a shift fork installed on the large magnetic ring assembly, and a limiting structure provided on the vertical gear to limit the position of the large magnetic ring assembly and prevent the large magnetic ring assembly from shaking and affecting the accurate flow counting. The limiting structure consists of a limiting block provided on the vertical gear, a connecting block provided on the large magnetic ring assembly, and a limiting groove provided on the limiting block that is adapted to the connecting block.

[0006] More preferably, it also includes a bushing mounted on the housing, and the large magnetic ring assembly includes a magnetic ring retainer mounted on the bushing, a shift fork mounted on the magnetic ring retainer, and a large magnetic ring mounted between the bushing, the magnetic ring retainer, and the shift fork.

[0007] More preferably, the large magnetic ring assembly includes a bushing mounted on the housing, a magnetic ring retainer mounted on the bushing, a shift fork mounted on the magnetic ring retainer, and a large magnetic ring mounted between the bushing, the magnetic ring retainer, and the shift fork.

[0008] A further preferred embodiment includes resistance welding heads mounted on the housing, one of which is connected to the movement and the other is connected to the housing.

[0009] A further preferred embodiment includes an intermediate wheel movably mounted on a bracket and meshing with a vertical gear, the intermediate wheel being meshed and driven by the movement mechanism.

[0010] More preferably, the large magnetic ring has a ring array of several magnetic poles.

[0011] The beneficial effects of this utility model are as follows: By setting the limiting structure, the position of the large magnetic ring assembly installed on the housing is limited. At the same time, the fork on the large magnetic ring assembly is connected to the vertical gear for limiting, so that the two can move synchronously when rotating, without the phenomenon of free rotation. Moreover, the large magnetic ring assembly will not shake. Therefore, the flow rate will not be affected by the shaking and free rotation of the large magnetic ring assembly, thus enabling accurate counting and sampling even at small flow rates. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a partial structural schematic diagram of the present invention;

[0014] Figure 3 This is a partial structural schematic diagram of the present invention;

[0015] Figure 4 This is a partial cross-sectional structural schematic diagram of this utility model;

[0016] Figure 5 This is a schematic diagram of the magnetic pole distribution of the large magnetic ring in this utility model.

[0017] Legend: 1. Housing; 2. Mechanism; 3. Bracket; 4. Vertical gear; 41. Limiting block; 42. Limiting groove; 5. Large magnetic ring assembly; 51. Bushing; 52. Magnetic ring fixing piece; 53. Large magnetic ring; 6. Shift fork; 61. Connecting block; 7. Resistance welding head; 8. Intermediate wheel. Detailed Implementation

[0018] The following description, in conjunction with the accompanying drawings, further illustrates a gas meter with a micro-flow sampling module according to this utility model.

[0019] It should be noted that all directional indicators such as up, down, left, right, front, back, etc. in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can also mean a mechanical connection, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] See Figures 1-5 As shown, a gas meter with a micro-flow sampling module includes a housing 1, a movement 2 installed inside the housing 1, and a bracket 3 installed on the movement 2; characterized in that it also includes a vertical gear 4 installed on the bracket 3, a large magnetic ring assembly 5 rotating on the housing 1, a shift fork 6 installed on the large magnetic ring assembly 5, and a limiting structure provided on the vertical gear 4 to limit the position of the large magnetic ring assembly 5 and prevent the large magnetic ring assembly 5 from shaking and affecting the accurate flow counting. The limiting structure is a limiting block 41 provided on the vertical gear 4, a connecting block 61 provided on the large magnetic ring assembly 5, and a limiting groove 42 provided on the limiting block 41 that is adapted to the connecting block 61.

[0022] The large magnetic ring has a ring array of 6 magnetic poles, each of which is a pulse signal. The preset pulse equivalent of each pulse signal is 0.2 liters, and the total equivalent of one ring of the large magnetic ring is 1.2 liters. Therefore, when the magnetic metering sensor is installed in the bushing to sense the magnetic poles on the large magnetic ring, each magnetic pole is 0.2 liters, which enables accurate sampling of minute flow rates.

[0023] The combined setting of the limiting structure limits the position of the large magnetic ring assembly 5 installed on the housing 1, and at the same time limits the connection between the fork 6 on the large magnetic ring assembly 5 and the vertical gear 4, so that the two can move synchronously when rotating, and there will be no free rotation. The large magnetic ring assembly 5 will not shake, so there will be no false pulses caused by the shaking and free rotation of the large magnetic ring assembly 5, which will affect the accurate counting of flow.

[0024] In one embodiment, a bushing 51 is also mounted on the housing 1. The large magnetic ring assembly 5 includes a magnetic ring fixing member 52 mounted on the bushing 51, a shift fork 6 mounted on the magnetic ring fixing member 52, and a large magnetic ring 53 mounted between the bushing 51, the magnetic ring fixing member 52, and the shift fork 6.

[0025] The connecting block 61 is mounted on the shift fork 6. When the shift fork 6 is rotated by the vertical gear 4, the large magnetic ring 53 is rotated by the shift fork 6. By mounting the connecting block 61 on the shift fork 6 and locking it in the limiting groove 42 of the vertical gear 4, the shift fork 6 can be rotated synchronously and accurately when the vertical gear 4 rotates. At the same time, the limiting groove 42 limits the position of the connecting block 61, thereby limiting the position of the shift fork 6 and ensuring that the shift fork 6 will not wobble when rotating. The vertical gear 4 can also drive the shift fork 6 to rotate synchronously, thus ensuring accurate flow counting.

[0026] In one embodiment, a resistance welding head 7 is also included, which is mounted on the housing 1. One resistance welding head 7 is connected to the mechanism 2, and the other resistance welding head 7 is connected to the housing 1.

[0027] In one embodiment, it further includes a median 8 movably mounted on the bracket 3 and meshing with the vertical gear 4, the median 8 being meshed and driven with the movement 2.

[0028] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.

Claims

1. A gas meter with a micro-flow sampling module, comprising a housing (1), a movement (2) installed inside the housing (1), and a bracket (3) installed on the movement (2); characterized in that... It also includes a vertical gear (4) mounted on the bracket (3), a large magnetic ring assembly (5) mounted on the housing (1), a shift fork (6) mounted on the large magnetic ring assembly (5), and a limiting structure set on the vertical gear (4) to limit the position of the large magnetic ring assembly (5) and prevent the large magnetic ring assembly (5) from shaking and affecting the accurate counting of flow. The limiting structure is a limiting block (41) set on the vertical gear (4), a connecting block (61) set on the large magnetic ring assembly (5), and a limiting groove (42) set on the limiting block (41) that is adapted to the connecting block (61).

2. A gas meter with a micro-flow sampling module according to claim 1, characterized in that: It also includes a bushing (51) mounted on the housing (1), and the large magnetic ring assembly (5) includes a magnetic ring retainer (52) mounted on the bushing (51), a fork (6) mounted on the magnetic ring retainer (52), and a large magnetic ring (53) mounted between the bushing (51), the magnetic ring retainer (52), and the fork (6).

3. A gas meter with a micro-flow sampling module according to claim 2, characterized in that: The connecting block (61) is set on the shift fork (6).

4. A gas meter with a micro-flow sampling module according to claim 1, characterized in that: It also includes resistance welding heads (7) mounted on the housing (1), one of which is connected to the mechanism (2) and the other is connected to the housing (1).

5. A gas meter with a micro-flow sampling module according to claim 1, characterized in that: It also includes a median (8) that is movably mounted on the bracket (3) and meshes with the vertical gear (4), the median (8) being meshed and driven with the mechanism (2).

6. A gas meter with a micro-flow sampling module according to claim 2, characterized in that: The large magnetic ring (53) has a ring array of several magnetic poles.

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