CN209979002U - Gas leakage prevention connector with warning function for gas valve of gas meter - Google Patents

Abstract

The utility model discloses a joint with gas leakage prevention and warning functions for a gas valve of a gas meter, which comprises a sealing gasket, a joint, a warning ring and a fastening nut, wherein a first through hole is formed in the joint of an external hexagonal, an external thread is arranged at the upper end of the hexagonal, a fixed step is arranged at the lower end of the hexagonal, and an inner groove is formed in the lower end surface of the fixed step; the embedded inslot of packing into of sealed pad, the utility model discloses a sealing washer with connect embedded centering elastic connection, the sealed terminal surface that fills up locks the sealed sealing washer elasticity embedding with a plurality of circles of gas table thread joint terminal surface and compresses tightly, the contact surface is circular shape linear dress, improve the leakproofness greatly, and reduce the damage of sealing washer terminal surface when the fastening, the problem of sealing washer fracture gas leakage when sealing washer position radial deviation leads to the fastening in the past has also been eliminated, the position that the pointer of warning ring corresponds the gas valve, do benefit to fastening nut in case not hard up, the pointer position change and the visual display of warning ring, indicate audio-visual warning function.

Description

Gas leakage prevention connector with warning function for gas valve of gas meter

Technical Field

The utility model relates to a gas table pneumatic valve leak protection gas and take joint of warning.

Background

The gas table has a pneumatic valve with outside gas inlet pipe fitting, be convenient for inside gas transmission to close, the connection between pneumatic valve and gas table needs a joint, the pneumatic valve is connected to one end, the gas table is connected to the other end, conventional joint is threaded joint body and fastening nut combination and is one set, the screw thread of joint body and pneumatic valve are connected, fastening nut cup joints on the joint body, a sealing washer is packed into to fastening nut's internal thread bottom, fastening nut's internal thread and gas table inlet connector's external screw thread spiro union, be convenient for be connected the terminal surface of joint body and gas table inlet connector's terminal surface, make inside pipeline intercommunication and seal with the sealing washer between the terminal surface, however, the drawback of similar connected mode is: when the sealing ring is fastened, the position of the sealing ring can be irregularly deviated in the radial direction, so that the sealing ring is broken and leaks air when being fastened, and the air leakage phenomenon frequently occurs when soapy water is smeared after the sealing ring is fastened for inspection; in the connection mode, the sealing ring and the joint parts at two ends are in end surface compression connection, and the end surfaces of the joints are in surface contact, so that the compression sealing performance of all the positions of the sealing ring is different due to uneven joint end surfaces, and the leakage hidden danger caused by the incomplete sealing is avoided; in long-term use, if the fastening nut is loosened, ineffective sealing can be generated to cause leakage, but the conventional fastening nut cannot be intuitively displayed to give a warning or prompt if the conventional fastening nut is loosened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a joint with gas leakage prevention and warning functions for a gas valve of a gas meter, which comprises a sealing gasket, a joint, a warning ring and a fastening nut, wherein a first through hole is formed in the joint of an external hexagonal, an external thread is formed at the upper end of the hexagonal, a fixed step is formed at the lower end of the hexagonal, and an inner groove is formed on the lower end surface of the fixed step; the sealing gasket is embedded into the inner groove, and the outer circumference of the sealing gasket and the hole wall of the connecting hole are elastically attached to two side walls of the inner groove; the utility model discloses a sealing washer and joint embedded centering elastic connection, the sealed terminal surface that fills up locks the sealed sealing washer elasticity embedding with a plurality of circles of gas table thread joint terminal surface and compresses tightly, the contact surface is circular shape linear dress, improve the leakproofness greatly, and reduce the damage of sealing washer terminal surface when the fastening, the problem of sealing washer gas leakage that breaks when sealing washer position radial deviation leads to the fastening in the past has also been eliminated, the pointer of warning ring corresponds the position that the gas valve corresponds, do benefit to fastening nut in case not hard up, the pointer position change and the visual display of warning ring, indicate audio-visual warning function.

In order to achieve the above purpose, the technical scheme of the utility model is that: a joint with gas leakage prevention and warning functions for a gas valve of a gas meter comprises a sealing gasket, a joint, a warning ring and a fastening nut, wherein a first through hole is formed in the joint;

the sealing gasket is provided with a connecting hole, the sealing gasket is embedded into the inner groove, and the outer circumference of the sealing gasket and the hole wall of the connecting hole are elastically attached to two side walls of the inner groove;

the fastening nut is provided with a through hole, one end of the through hole is provided with a screw hole, the outer circumference of the fastening nut is provided with a hexagonal edge, and the outer circumference of a step at one end of the hexagonal edge is provided with a groove;

a third through hole is formed in the warning ring, a pointer extending outwards is arranged at any position of the outer circumference of the warning ring, the warning ring is sleeved in a groove of the fastening nut, and the third through hole is elastically connected with the groove;

the fastening nut is sleeved outside the joint and moves until the inner end face of the screw hole touches the inner end face of the fixed step.

It is further provided that the gasket is an elastic nitrile rubber.

The utility model has the advantages that: the utility model discloses a sealing washer and joint embedded centering elastic connection, the sealed terminal surface that fills up locks the sealed sealing washer elasticity embedding with a plurality of circles of gas table thread joint terminal surface and compresses tightly, the contact surface is circular shape linear dress, improve the leakproofness greatly, and reduce the damage of sealing washer terminal surface when the fastening, the problem of sealing washer gas leakage that breaks when sealing washer position radial deviation leads to the fastening in the past has also been eliminated, the pointer of warning ring corresponds the position that the gas valve corresponds, do benefit to fastening nut in case not hard up, the pointer position change and the visual display of warning ring, indicate audio-visual warning function.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of a coupling nut;

FIG. 4 is a schematic view of a warning ring;

fig. 5 is a schematic view of the overall installation of the present invention.

In the figure: the sealing gasket comprises a sealing gasket 1, a connecting hole 101, a joint 2, an external thread 201, a hexagon 202, an extending section 203, a fixing step 204, an internal groove 205, a first through hole 207, a warning ring 3, a pointer 301, a third through hole 302, a fastening nut 1001, a screw hole 1002, a through hole 1003, a hexagonal edge 1004, a gas meter 1005, a threaded joint 1006, a locking sealing ring 1007 and a groove 1008.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

As shown in fig. 1 to 4, a gas leakage prevention and warning joint for a gas valve of a gas meter comprises a sealing gasket 1, a joint 2, a warning ring 3 and a fastening nut 1001, wherein a first through hole 207 is formed in the joint 2, a hexagonal 202 is arranged on the outer circumference of the middle part of the joint 2, an external thread 201 is arranged at the upper end of the hexagonal 202, an extension section 203 is arranged at the lower end of the hexagonal 202, a fixed step 204 is arranged at the lower end of the extension section 203, and an inner groove 205 is arranged on the lower end surface of the fixed step 204; the sealing gasket 1 is provided with a connecting hole 101, the sealing gasket 1 is embedded into the inner groove 205, and the outer circumference of the sealing gasket 1 and the hole wall of the connecting hole 101 are elastically attached to two side walls of the inner groove 205;

the fastening nut 1001 is provided with a through hole 1003, one end of the through hole 1003 is provided with a screw hole 1002, the outer circumference of the fastening nut 1001 is provided with a hexagonal edge 1004, and the outer circumference of a step at one end of the hexagonal edge 1004 is provided with a groove 1008; a third through hole 302 is formed in the warning ring 3, a pointer 301 extending outwards is arranged at any position of the outer circumference of the warning ring 3, the warning ring 3 is sleeved in a groove 1008 of the fastening nut 1001, and the third through hole 302 is elastically connected with the groove 1008; the fastening nut 1001 is fitted around the outside of the joint 2 and moved until the inner end surface of the screw hole 1002 hits the inner end surface of the fixing step 204.

The sealing gasket 1 is elastic nitrile rubber, has elasticity and good sealing property, can prevent corrosion of petroleum and related refined products, is ageing-resistant and has high safety.

The utility model discloses a sealing washer and joint embedded centering elastic connection, the sealed terminal surface that fills up locks the sealed sealing washer elasticity embedding with a plurality of circles of gas table thread joint terminal surface and compresses tightly, the contact surface is circular shape linear dress, improve the leakproofness greatly, and reduce the damage of sealing washer terminal surface when the fastening, the problem of sealing washer gas leakage that breaks when sealing washer position radial deviation leads to the fastening in the past has also been eliminated, the pointer of warning ring corresponds the position that the gas valve corresponds, do benefit to fastening nut in case not hard up, the pointer position change and the visual display of warning ring, indicate audio-visual warning function.

As shown in fig. 5: a fastening nut 1001 externally provided with a hexagonal edge 1004 is provided with a through hole 1003, the aperture of the through hole 1003 is slightly larger than the diagonal of a hexagon 202 and smaller than the diameter of a fixed step 204, one end of the through hole is provided with a screw hole 1002 with the diameter larger than the through hole 1003, a joint 2 provided with a sealing gasket 1 is sleeved in the fastening nut 1001, the inner end surface of the fixed step 204 is abutted against the bottom of the screw hole 1002, the fastening nut 1001 is rotated to enable the screw hole 1002 to be connected and fixed with the thread of an air inlet joint of a gas meter 1005, the end surface of a threaded joint 1006 of the gas meter 1005, which is sealed with a sealing ring, is provided with a locking sealing ring 1007 which is spirally parallel and convex, the outer end surface of the locking sealing ring 1007 is semicircular, the joint 2 provided with the sealing gasket 1 is synchronously driven to axially move, the end surface of the sealing gasket 1 is, and the gas meter 1005 and the gas valve are connected by the joint seal until the end surface of the sealing gasket 1 contacts with the end surface of the threaded joint 1006. The double sealing of the structure further improves the whole sealing performance, and greatly reduces the probability of unqualified air leakage detection caused by the problems; the pointer of warning ring corresponds the position that the gas valve corresponds, does benefit to fastening nut in case not hard up, and the pointer position change of warning ring and audio-visual display, the audio-visual warning function of suggestion.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.

Claims (2)

1. The utility model provides a joint that gas table pneumatic valve leak protection gas and area were warned which characterized in that: the anti-theft alarm device comprises a sealing gasket (1), a joint (2), a warning ring (3) and a fastening nut (1001), wherein a first through hole (207) is formed in the joint (2), a hexagonal nut (202) is arranged on the outer circumference of the middle part of the joint (2), an external thread (201) is arranged at the upper end of the hexagonal nut (202), an extension section (203) is arranged at the lower end of the hexagonal nut (202), a fixed step (204) is arranged at the lower end of the extension section (203), and an inner groove (205) is formed in the lower end face of the fixed step (204);

the sealing gasket (1) is provided with a connecting hole (101), the sealing gasket (1) is embedded into the inner groove (205), and the outer circumference of the sealing gasket (1) and the hole wall of the connecting hole (101) are elastically attached to two side walls of the inner groove (205);

the fastening nut (1001) is provided with a through hole (1003), one end of the through hole (1003) is provided with a screw hole (1002), the outer circumference of the fastening nut (1001) is provided with a hexagonal edge (1004), and the outer circumference of a step at one end of the hexagonal edge (1004) is provided with a groove (1008);

a third through hole (302) is formed in the warning ring (3), a pointer (301) extending outwards is arranged at any position of the outer circumference of the warning ring (3), the warning ring (3) is sleeved in a groove (1008) of the fastening nut (1001), and the third through hole (302) is elastically connected with the groove (1008);

the fastening nut (1001) is sleeved outside the joint (2) and moves to the inner end face of the screw hole (1002) to touch the inner end face of the fixing step (204).

2. The gas leakage preventing joint with the warning function for the gas valve of the gas meter as claimed in claim 1, wherein: the sealing gasket (1) is elastic butadiene-acrylonitrile rubber.

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