Gas meter housing sealing process and sealing structure

Abstract

The present invention belongs to the field of gas meter housing machining and production. Disclosed is a gas meter housing sealing process. An upper housing and a lower housing are fixedly connected by means of laser welding. Laser welding is utilized, and polyurethane glue and a stainless steel sealing ring are omitted, such that machining costs can be saved, and pollution to a production environment is also reduced.

Description

Gas meter shell sealing process and sealing structure Technical Field

[0001] The present invention relates to the field of gas meter shell processing and production, and in particular to a gas meter shell sealing process and sealing structure. Background Art

[0002] With the continued development of clean energy, the proportion of natural gas usage is increasing year by year, and natural gas safety issues are becoming more important. As a gas metering device, the national standards for diaphragm gas meters will continue to increase, which requires the gas meter casing to have excellent protective performance.

[0003] Figures 1 and 2 show a commonly used gas meter housing on the market. The housing comprises an upper housing 1, a lower housing 2, polyurethane sealant 3, and a stainless steel sealing ring 4. The upper and lower housings are sealed with polyurethane sealant, and then secured together with the stainless steel sealing ring. To enhance the appearance of the gas meter housing, plastic powder is sprayed onto the surface. Both polyurethane sealant and plastic powder are chemicals, which can pollute and impact the environment during use.

[0004] Summary of the Invention

[0005] In order to solve the above technical problems, a gas meter shell sealing process is provided that does not use polyurethane sealant, which can achieve sealing of the gas meter shell and reduce the use of chemical agents, thereby protecting both the production environment and the health of operators.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a gas meter shell sealing process, comprising an upper shell and a lower shell, wherein the upper shell and the lower shell are fixedly connected by laser welding.

[0007] According to the present invention, the upper shell and the lower shell are made of zinc-magnesium-aluminum material.

[0008] The present invention also provides a gas meter housing sealing structure, which uses the above-mentioned gas meter housing sealing process to seal the upper housing and the lower housing.

[0009] Specifically, the upper shell has an upper shell connecting end, and the lower shell has a lower shell connecting end. The upper shell connecting end and the lower shell connecting end are fixedly connected to form an integrated structure by laser welding.

[0010] Specifically, the upper shell connection end extends horizontally in a direction away from the gas meter, and the lower shell connection end extends horizontally in a direction away from the gas meter, and the upper shell connection end and the lower shell connection end correspond to each other in position.

[0011] Specifically, the distal end of the upper shell connection end is a transition sealing section, and the transition sealing section wraps the distal end surface of the lower shell connection end.

[0012] Compared with existing technologies, this invention offers advantages in that it utilizes laser welding, eliminating the need for polyurethane glue and stainless steel seals, saving machining costs and reducing environmental pollution. The housing material is changed from hot-dip galvanized steel with plastic spraying to zinc-magnesium-aluminum, eliminating the need for surface spraying and offering improved salt spray resistance. The surface coating of this material exhibits self-healing properties, and the laser-welded welds offer excellent sealing and high tensile strength, fully meeting the sealing and mechanical performance requirements of gas meter housings.

[0013] The shell of the gas meter adopts laser welding technology, which can make the upper and lower shells completely integrated, and has a certain anti-magnetic field interference effect, which has a protective effect on some new gas meter electronic functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic structural diagram of the prior art;

[0015] FIG2 is a partial enlarged schematic diagram of FIG1 ;

[0016] FIG3 is a schematic diagram of the gas meter housing structure of the present invention;

[0017] FIG4 is a partial enlarged schematic diagram of point A in FIG3 .

[0018] Wherein: 1-upper shell, 11-upper shell connecting end, 111-transition sealing section, 2-lower shell, 21-lower shell connecting end. DETAILED DESCRIPTION

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0020] Referring to Figures 3 and 4, a gas meter housing sealing structure includes an upper housing 1 and a lower housing 2 sealed and fixedly connected thereto. The gas meter is placed in a sealed cavity formed by the upper housing 1 and the lower housing 2. The upper housing 1 has an upper housing connection end 11 extending horizontally away from the gas meter, and the lower housing 2 has a lower housing connection end 21 extending horizontally away from the gas meter. The upper housing connection end 11 is fixedly connected to the lower housing connection end 21, thereby achieving a fixed connection between the upper housing 1 and the lower housing 2. Preferably, there are two upper housing connection ends 11, symmetrically arranged on the left and right sides of the upper housing 1, and two lower housing connection ends 21, symmetrically arranged on the left and right sides of the lower housing 2, to facilitate the fixed connection between the upper housing 1 and the lower housing 2 and improve the convenience of connecting the upper housing 1 and the lower housing 2.

[0021] To prevent the problem of loose sealing of the side gaps between the two connections, which could lead to dust entering the interior of the housing and affecting the normal operation of the gas meter, and thus shortening the service life of the gas meter, the distal end of the upper housing connection end 11 is a transition sealing section 111. The transition sealing section 111 wraps around the distal end of the lower housing connection end 21, eliminating the connection seam between the two and preventing dust from entering the cavity formed by the upper housing 1 and the lower housing 2. Preferably, the transition sealing section 111 is arc-shaped, and the arc-shaped inner surface of the transition sealing section 111 contacts the distal end face of the lower housing connection end 21. The lower housing connection end 21 is enclosed within the transition sealing section 111, ensuring a seamless connection between the two. To enhance the appearance of the housing, the bottom surface of the transition sealing section 111 is coplanar with the bottom surface of the lower housing connection end 21.

[0022] In order to achieve a fixed connection between the upper shell connection end 11 and the lower shell connection end 21, laser welding is used to weld the contact surfaces of the upper shell connection end 11 and the lower shell connection end 21 into an integrated structure. Laser welding is started from the upper shell connection end 11 and the lower shell connection end 21 close to the shell side, and welding is gradually carried out along the contact surface away from the shell until all the contact surfaces of the two are welded. The material of the upper shell 1 and the lower shell 2 is zinc-magnesium-aluminum material. The use of this material eliminates the need for surface spraying and has a better salt spray resistance. The surface of this material has a coating self-healing function. The weld seam produced by laser welding has good sealing and high tensile strength, which fully meets the sealing and mechanical performance requirements of the gas meter shell. In addition, the shell of the gas meter adopts a laser welding process, which can make the upper shell 1 and the lower shell 2 completely integrated, and has a certain anti-magnetic field interference effect, which has a protective effect on some new gas meter electronic functions such as ultrasonic and thermal meters.

[0023] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing process for a gas meter housing, comprising an upper housing and a lower housing, characterized in that: The upper housing and the lower housing are fixedly connected by laser welding.

2. The gas meter housing sealing process according to claim 1, characterized in that: The upper housing and the lower housing are made of zinc-magnesium-aluminum material.

3. A sealing structure for a gas meter housing, characterized in that: The upper housing and the lower housing are sealed by using the gas meter housing sealing process as described in Claim 1 or 2.

4. The sealing structure of a gas meter housing according to claim 3, characterized in that: The upper housing has an upper housing connection end, and the lower housing has a lower housing connection end. The upper housing connection end and the lower housing connection end are fixedly connected into an integral structure by laser welding.

5. The sealing structure of a gas meter housing according to claim 4, wherein: The upper housing connection end extends horizontally away from the gas meter, and the lower housing connection end extends horizontally away from the gas meter. The positions of the upper housing connection end and the lower housing connection end correspond to each other.

6. The sealing structure of a gas meter housing according to claim 5, characterized in that: The distal end of the upper housing connection end is a transition sealing section, and the transition sealing section wraps the distal end face of the lower housing connection end.

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