Diaphragm type gas meter capable of resisting magnetic interference

Abstract

The utility model relates to an anti-magnetic interference diaphragm gas meter, which comprises a meter body and a shell, and has the technical key points that the shell is spherical, a shielding shell is arranged on the outer side of the shell, the shielding shell is formed by buckling an upper rectangular shell and a lower rectangular shell, an anti-interference upper cavity is arranged on the inner side of the upper rectangular shell, an anti-interference lower cavity is arranged on the inner side of the lower rectangular shell, and the anti-interference lower cavity is arranged on the outer side of the shell. The upper anti-interference cavity and the lower anti-interference cavity are respectively provided with a spherical supporting wall close to the shell, a supporting gasket is arranged between the lower end of the spherical supporting wall of the lower anti-interference cavity and the shell, and an air inlet pipe connector and an air outlet pipe connector which are led out of the upper anti-interference cavity and the shell are arranged on the top of the shell. A plurality of anti-interference coil assemblies are evenly arranged on the inner side faces of the spherical supporting walls of the upper anti-interference cavity and the lower anti-interference cavity, and magnetic sensors are arranged at the four corners of the upper anti-interference cavity and the four corners of the lower anti-interference cavity respectively. According to the watch, the anti-magnetic-interference capability is remarkably improved, the anti-magnetic-interference capability can be flexibly adjusted according to the external magnetic field intensity, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meters, and particularly relates to a diaphragm gas meter with anti-magnetic interference. Background Art

[0002] At present, when an intelligent diaphragm gas meter is running, a pulse sampler converts the magnetic pulse signal generated by the rotation of the counter wheel of the basic meter into an electrical pulse signal, and an intelligent controller collects and processes the flow electrical pulse to realize functions such as gas volume measurement, gas volume display, IC card data exchange, and fault alarm detection. However, it needs to have a certain anti-magnetic interference ability during operation to avoid situations such as non-measurement of gas flow.

[0003] For example, CN 220270520 U discloses an ultrasonic gas meter with an anti-magnetic interference structure. Double-sided conductive copper foils are provided on the inner sides of the flanges of the upper shell and the lower shell to fix the upper shell and the lower shell to form a conductive box body, and copper foils are coated on the wires inside and outside the shell to enable the entire structure to effectively resist electromagnetic interference. At the same time, the grooves of the metal hoop wrapped around the outer circles of the upper shell and the lower shell are coated with sealant to prevent gas leakage, aiming to enable the entire gas meter to be used safely and reliably in gas and measure accurately. However, there are the following problems: the anti-interference ability is weak, and the anti-magnetic interference ability cannot be flexibly adjusted according to the external magnetic field intensity. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a diaphragm gas meter with anti-magnetic interference that has a reasonable structure, reliable use, can significantly improve the anti-magnetic interference ability, can flexibly adjust the anti-magnetic interference ability according to the external magnetic field intensity, and has a wide application range.

[0005] The technical solution of the utility model is as follows:

[0006] A diaphragm gas meter with anti-magnetic interference includes a meter body and a shell. The technical key points are: the shell is spherical, and a shielding shell is provided outside the shell. The shielding shell is formed by buckling an upper rectangular shell and a lower rectangular shell. An anti-interference upper cavity is provided on the inner side of the upper rectangular shell, and an anti-interference lower cavity is provided on the inner side of the lower rectangular shell. The anti-interference upper cavity and the anti-interference lower cavity are respectively provided with spherical support walls close to the shell. A support gasket is provided between the low-position end of the spherical support wall of the anti-interference lower cavity and the shell. An air inlet joint and an air outlet joint for leading out the anti-interference upper cavity and the shell are provided at the top of the shell. A plurality of anti-interference coil assemblies are evenly provided on the inner side surfaces of the spherical support walls of the anti-interference upper cavity and the anti-interference lower cavity. Magnetic sensors are respectively provided at the four corners of the anti-interference upper cavity and the four corners of the anti-interference lower cavity.

[0007] The above-mentioned diaphragm gas meter with anti-magnetic interference, the anti-interference upper cavity is provided with avoidance pipe sleeves corresponding to the inlet pipe joint and the outlet pipe joint, the inner ends of the inlet pipe joint and the outlet pipe joint are respectively segmented, the upper section is inserted into the lower section and a sealing ring is clamped between the upper and lower sections.

[0008] For the above-mentioned diaphragm gas meter with anti-magnetic interference, the docking position of the upper rectangular shell and the lower rectangular shell of the shielding shell is at the lower part, and the docking position of the anti-interference upper cavity and the anti-interference lower cavity is at the upper part, which are arranged staggeredly.

[0009] The beneficial effects of the present invention are as follows:

[0010] A plurality of anti-interference coil assemblies are evenly arranged on the outer side of the spherical shell, and magnetic force sensors are respectively arranged at the four corners of the upper part and the four corners of the lower part of the spherical shell to realize the magnetic field monitoring of the environment where the gas meter is located, that is, the magnetic field direction and magnetic force magnitude of the environment where the gas meter is located are monitored by the magnetic force sensors. Through the signal feedback of the magnetic force sensors, the corresponding anti-interference coil assemblies are energized and the current magnitude is adjusted to generate a reverse magnetic force of a corresponding magnitude to offset the external magnetic force, so as to avoid the influence of external factors on electrical components such as metering elements in the meter body, ensure the metering accuracy, significantly improve the anti-magnetic interference ability, and at the same time, the present invention can flexibly adjust the anti-magnetic interference ability according to the external magnetic field intensity, and has a wide application range. Description of the Drawings

[0011] Figure 1 is a schematic diagram of the internal structure of the present invention;

[0012] Figure 2 is an external view of the present invention.

[0013] In the figure: 1. upper rectangular shell, 2. anti-interference upper cavity, 3. inlet pipe joint, 4. sealing ring, 5. upper shell, 6. outlet pipe joint, 7. anti-interference coil assembly, 8. magnetic force sensor, 9. lower shell, 10. lower rectangular shell, 11. support gasket, 12. anti-interference lower cavity, 13. spherical support wall. Detailed Embodiments

[0014] The present invention will be described in detail according to the accompanying drawings of the specification.

[0015] As Figure 1 , Figure 2 shown, the diaphragm gas meter with anti-magnetic interference includes a meter body and a shell arranged on the outer side of the meter body. The shell is formed by buckling an upper shell 5 and a lower shell 9.

[0016] Among them, the housing is spherical, and a shielding case is provided outside the housing. The shielding case is formed by buckling an upper rectangular case 1 and a lower rectangular case 10. An anti-interference upper cavity 2 is provided inside the upper rectangular case 1, and an anti-interference lower cavity 12 is provided inside the lower rectangular case 10. The anti-interference upper cavity 2 and the anti-interference lower cavity 12 are respectively provided with spherical support walls 13 close to the housing. A support gasket 11 is provided between the lowermost end of the spherical support wall 13 of the anti-interference lower cavity 12 and the housing. An air inlet joint 3 and an air outlet joint 6 for leading out the anti-interference upper cavity 2 and the housing are provided at the top of the housing. A plurality of anti-interference coil assemblies 7 are evenly provided on the inner side surfaces of the spherical support walls 13 of the anti-interference upper cavity 2 and the anti-interference lower cavity 12, and magnetic force sensors 8 are respectively provided at the four corners of the anti-interference upper cavity 2 and the four corners of the anti-interference lower cavity 12.

[0017] In this embodiment, the anti-interference upper cavity 2 is provided with avoidance pipe sleeves corresponding to the air inlet joint 3 and the air outlet joint 6. The inner ends of the air inlet joint 3 and the air outlet joint 6 are respectively of a segmented type, and the upper section is inserted into the lower section, and a sealing ring 4 is clamped between the upper and lower sections. The docking position of the upper rectangular case 1 and the lower rectangular case 10 of the shielding case is at the lower part, and the docking position of the anti-interference upper cavity 2 and the anti-interference lower cavity 12 is at the upper part, and they are arranged staggeredly.

[0018] Working principle:

[0019] The magnetic field conditions on the outer periphery of the meter body are monitored in real time by using 8 magnetic force sensors 8. When the magnetic force sensors 8 in one or more directions detect an external magnetic field, the anti-interference coil assemblies 7 close to this one or more magnetic force sensors 8 are energized, and then the current magnitude is adjusted according to the feedback of the magnetic force sensors 8 until the external magnetic force is offset, ensuring the metering accuracy and working reliability of the gas meter.

[0020] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equal changes and improvements made within the scope of the creation of the present invention shall still fall within the scope covered by this patent.

Claims

1. A magnetic interference-resistant membrane gas meter, comprising a meter body and a shell, characterized in that: The shell is spherical, and a shielding shell is provided on the outside of the shell, and the shielding shell is formed by buckling an upper rectangular shell and a lower rectangular shell, and an anti-interference upper cavity is provided on the inner side of the upper rectangular shell, and an anti-interference lower cavity is provided on the inner side of the lower rectangular shell, and the anti-interference upper cavity and the anti-interference lower cavity are respectively provided with spherical supporting walls close to the shell, and a supporting gasket is provided between the low end of the spherical supporting wall of the anti-interference lower cavity and the shell, and an air inlet pipe joint and an air outlet pipe joint leading out of the anti-interference upper cavity and the shell are provided on the top of the shell, and a plurality of anti-interference coil assemblies are evenly provided on the inner side surfaces of the spherical supporting walls of the anti-interference upper cavity and the anti-interference lower cavity, and magnetic sensors are respectively provided at the four corners of the anti-interference upper cavity and the four corners of the anti-interference lower cavity.

2. The magnetic interference-resistant diaphragm gas meter according to claim 1 is characterized in that: The anti-interference upper cavity is provided with avoidance sleeves corresponding to the air inlet pipe joint and the air outlet pipe joint. The inner ends of the air inlet pipe joint and the air outlet pipe joint are respectively segmented, the upper section is inserted into the lower section, and a sealing ring is clamped between the upper and lower sections.

3. The magnetic interference-resistant diaphragm gas meter according to claim 1 is characterized in that: The butt joint position of the upper rectangular shell and the lower rectangular shell of the shielding shell is at the bottom, and the butt joint position of the anti-interference upper cavity and the anti-interference lower cavity is at the top, and they are arranged alternately.

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