Today, I will introduce a national invention authorized patent-an electronic gas meter with a built-in filter device. The patent was applied for by Gold Card Smart Group Co., Ltd., and the authorization was announced on July 20, 2018.

Content description

The invention relates to the technical field of metering meters, in particular to an electronic gas meter with a built-in filter device.

Background of the invention

With the continuous breakthrough of electronic gas flow measurement technologies such as thermal and ultrasonic, electronic gas meters have been more and more widely used in recent years, because they have a small volume and structure that cannot be compared with traditional flow meters such as membrane type. Simple, energy saving and environmental protection, obvious scale effect, wide range ratio, no moving parts, good stability, it is already digital from its own principle, easy to realize the advantages of automatic production and intelligent gas meter, showing an alternative to traditional The trend of gas flow metering.

In practical applications, the particulate impurities in the gas pipeline and the impurities contained in the gas itself will continue to adhere to the internal components of the gas meter as the gas is used, which will not only corrode the components, reduce the service life, but also affect the accuracy of measurement, especially It has a more obvious impact on electronic gas meters. How to improve the pollution resistance of electronic gas meters is a technical problem that urgently needs to be solved. Some electronic gas meters are equipped with a filter device in the air inlet, but due to the limited space of the air inlet, the filter area is small and the pressure loss is large, which does not meet the standard requirements; even if the filter is added to the inside of the case, it will pollute Objects can still be attached to the inner wall of the watch case in the upstream section, increasing the difficulty of later maintenance. There is also a part of the flow channel splitting with the labyrinth flow channel, which has a better effect on the coarse particles entering the gas meter, but the filtering effect of the dust with a small specific gravity cannot be fundamentally solved, and it is difficult to pass the industry standard pollution resistance test. Moreover, its structure is complicated and the craftsmanship is poor; in addition, because the gas meter installation site is not allowed to install an external filter, even if an external filter is installed with special requirements, there are problems of high cost and complicated installation. Therefore, the field expects that this electronic gas meter can have a better gas filtering effect on the basis of realization of intelligence, so as to ensure the service life and measurement accuracy.

Summary of the invention

The invention provides an electronic gas meter with a built-in filtering device to solve the deficiencies of the prior art, which can effectively filter gas impurities and improve the pollution resistance and service life of the gas meter.

[New patent introduction] Electronic gas meter with built-in filter device
The figure is a schematic diagram of the structure of the present invention.

In order to solve the above technical problems, the present invention adopts the following technical solution: an electronic gas meter with a built-in filter device includes a base meter housing, the base meter housing is provided with an air inlet and an air outlet, and the base meter housing A housing inner cavity is formed, and the electronic gas meter further includes a gas filter device, which is arranged in the housing inner cavity to filter the gas passing through the air inlet.

In the above electronic gas meter with a built-in filter device, the gas filter device includes a connecting body and a filter element installed on the connecting body, and the connecting body communicates with the air inlet to guide the gas into the filter element. After being filtered through the filter element, it passes into the inner cavity of the housing. In the above electronic gas meter with a built-in filter device, the filter element includes a filter cartridge and a filter material distributed along the circumference of the filter cartridge, the filter cartridge encloses a filter cavity, and one end of the filter cartridge is connected to the connecting body Connected, the filter cavity is in communication with the connecting body. In the above electronic gas meter with a built-in filter device, the filter cylinder includes an outer cylinder and an inner cylinder, a hollow interlayer is formed between the outer cylinder and the inner cylinder, and the filter material is distributed in the hollow interlayer. Both the outer cylinder and the inner cylinder are provided with filter holes.

In the above electronic gas meter with a built-in filter device, the filter material continuously or intermittently forms a plurality of pleated structures in the circumferential direction. The gas filter device further includes an end cover, and the end cover covers the other end of the filter cartridge. The connecting body includes a connecting piece and a fixing seat. The connecting piece is provided with an air inlet interface for communicating with the air inlet and an air outlet interface for communicating with the filter element. The fixing seat and the connecting piece are connected to form a connecting air inlet interface and The inner cavity of the outlet port. The connecting member and the fixing seat are assembled by snap-fitting.

The gas filter device is provided with a positioning hole, and the base meter housing is provided with a positioning column, and the positioning column is inserted into the positioning hole to position the gas filter device. The gas filter device is directly connected to the air inlet; or, a control valve is connected to the air inlet, and the gas filter device is connected to the control valve; or, a metering module is connected to the air inlet, The gas filter device is connected to the gas outlet, the metering module is located inside the gas filter device, and the gas passing through the gas inlet is filtered by the gas filter device and then enters the gas outlet through the metering module.

The beneficial effects of the present invention: the electronic gas meter with a built-in filter device of the present invention includes a base meter housing, the base meter housing is provided with an air inlet and an air outlet, and a housing cavity is formed in the base meter housing. The electronic gas meter further includes a gas filter device, which is arranged in the inner cavity of the casing to filter the gas passing through the air inlet.

The electronic gas meter of the present invention has a built-in gas filter device, which can realize the integrated design of the gas meter and the filter device, has high safety performance and low cost, and solves the problems of greater difficulty in installing an external filter and low safety; In the solution of installing a filter device in the mouth, the present invention is provided with a gas filter device in the inner cavity of the casing. The inner cavity of the casing has a relatively large space, which reduces the limitation of the installation space on the filter area of ​​the filter device, so as to improve the gas filtering effect and reduce the pressure loss. Thereby improving the pollution resistance and service life of the gas meter.

The fuel gas filter device includes a connecting body and a filter element installed on the connecting body, the connecting body communicates with the air inlet to introduce fuel gas into the filter element, and the fuel gas is filtered through the filter element and then passed into the housing Cavity. Such a modular design is convenient for processing and assembly, convenient for replacement and low cost. The filter element includes a filter cartridge and a filter material distributed along the circumference of the filter cartridge, the filter cartridge encloses a filter cavity, one end of the filter cartridge is connected to the connecting body, and the filter cavity is connected to the connecting body . The filter element of cylindrical structure has a large filtering area and can ensure the filtering effect; the filter cylinder can play a supporting role to ensure the structural strength of the filter element. The filter cylinder includes an outer cylinder and an inner cylinder, a hollow interlayer is formed between the outer cylinder and the inner cylinder, the filter material is distributed in the hollow interlayer, and both the outer cylinder and the inner cylinder are provided with filter holes. The double-layer filter cartridge has good strength and is not easy to deform; the filter material is distributed in the hollow interlayer to maintain the shape of the filter material, avoid the problem of deformation and shedding of the filter material, and ensure the reliability of the filter element; at the same time, the outer and inner cylinders also filter It can filter out some particulate impurities and some attached pollutants in the fuel gas, and further improve the filtering effect. The filter material continuously or intermittently forms a plurality of pleated structures along the circumferential direction. Increase the filtration area of ​​the filter material, reduce the pressure loss, and improve the filtration effect.

The gas filter device further includes an end cover, which covers the other end of the filter cartridge. The filtered impurities and pollutants can be retained in the filter cavity, and the end cap covers the other end of the filter cartridge to prevent the impurities and pollutants collected in the filter cavity from entering the base surface housing. The connecting body includes a connecting piece and a fixing seat. The connecting piece is provided with an air inlet interface for communicating with the air inlet and an air outlet interface for communicating with the filter element. The fixing seat and the connecting piece are connected to form a connecting air inlet interface and The inner cavity of the outlet port. The connecting piece is connected between the air inlet and the filter element, reducing the difficulty of installing the filter element in the base meter housing and facilitating the positioning of the gas filter device in the base meter housing; the fixing seat and the connecting piece are connected to form a connecting air inlet interface and an air outlet interface In the inner cavity, the gas from the air inlet enters the filter element through the air inlet port, the inner cavity, and the air outlet port. The inner cavity can filter out large particles and easily deposited impurities, reducing the burden on the filter element.

The connecting member and the fixing seat are assembled by snap-fitting. The realization of screw-free installation is conducive to improving the efficiency of product assembly and can also avoid the problem of secondary pollution caused by corrosion of the screws. The gas filter device is directly connected to the air inlet; or, a control valve is connected to the air inlet, and the gas filter device is connected to the control valve. In this design, the gas containing impurities enters the gas filter device directly or through a control valve, and does not contact the inner wall of the base meter housing and its internal components, so as to prevent the space and internal components of the meter from being polluted by gas impurities. A metering module is connected to the air inlet, the gas filter device is connected to the air outlet, the metering module is located inside the gas filter device, and the gas passing through the air inlet is filtered by the gas filter device and then passed through the metering The module enters the air outlet. After the gas enters the inner cavity of the shell from the air inlet or the control valve, most of the pollutants in the gas are directly deposited on the bottom of the inner cavity of the shell. The pollutants with small specific gravity and small volume are filtered by the gas filter device, and the filtered gas is metered The module enters the air outlet to prevent the metering module from being polluted by pollutants and reducing the metering accuracy.

960 Series Terminal Blocks

Withstand high voltage up to 750V (IEC/EN standard)

UL 94V-2 or UL 94V-0 flame retardant housing

Anti-falling screws

Optional wire protection

1~12 poles, dividable as requested


960 Series Terminal Blocks,Electrical Terminal Strips,Electronic Terminal Blocks,Nylon Terminal Block,ballast terminal blocks

Jiangmen Krealux Electrical Appliances Co.,Ltd. , https://www.krealux-online.com