CN204387409U

CN204387409U - The built-in thief-proof check valve of a kind of gas meter

Info

Publication number: CN204387409U
Application number: CN201420826991.4U
Authority: CN
Inventors: 陈艳红
Original assignee: TIANJIN XINFENG SETS INSTRUMENT Ltd Co
Current assignee: TIANJIN XINFENG SETS INSTRUMENT Ltd Co
Priority date: 2014-12-22
Filing date: 2014-12-22
Publication date: 2015-06-10
Anticipated expiration: 2024-12-22

Abstract

The utility model relates to the built-in thief-proof check valve of a kind of gas meter, comprise valve body, valve seat, hinged block and valve plate, valve body is a cylindrical tube structure, valve body upper end is coaxially shaped with annular outer, valve body lower end is made as beveled end surface, and valve body lower end inwall is shaped with valve seat, and this valve seat is the oblique planar annular flushed with valve body lower end face, the valve seat lower end of side, below is shaped with hinged block, and is hinged with a valve plate by this hinged block; The raised seals circle of fitting with valve plate is shaped with in valve seat lower end.The utility model structure is simply small and exquisite, easy for installation, is arranged on gas meter and shows body inside, and make gas meter itself have combustion gas adverse current cutoff function, reliability is high, effectively can prevent the reverse circulation of air-flow, also may be used for other counterflow-preventing pipelines, is suitable for promoting.

Description

The built-in thief-proof check valve of a kind of gas meter

Technical field

The utility model belongs to gas meter field, the built-in thief-proof check valve of especially a kind of gas meter.

Background technique

The Security of gas meter is very important; be directly connected to the personal safety of subscriber household; maintenance and the transformation of gas pipeline all need professional workforce to operate; private changes gas meter and fuel gas pipeline exists great potential safety hazard, at present, fuel gas pipeline installs check valve; and gas meter itself does not possess return-stopping function; if user carries out repacking at table body interface steal the protection of combustion gas shortage check valve, once cause leakage, there is very big hidden danger.

Model utility content

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides the built-in thief-proof check valve of gas meter that a kind of structure is simple, design science, cost are lower, easy to use.

The utility model solves its technical problem and takes following technological scheme to realize:

The built-in thief-proof check valve of a kind of gas meter, it is characterized in that: comprise valve body, valve seat, hinged block and valve plate, valve body is a cylindrical tube structure, valve body upper end is coaxially shaped with annular outer, valve body lower end is made as beveled end surface, and valve body lower end inwall is shaped with valve seat, and this valve seat is the oblique planar annular flushed with valve body lower end face, the valve seat lower end of side, below is shaped with hinged block, and is hinged with a valve plate by this hinged block; The raised seals circle of fitting with valve plate is shaped with in valve seat lower end.

And the coaxial interference fit of described check valve inserts mounting pipe upper end, and mounting pipe upper end-hole is shaped with position limiting convex ring.

And be shaped with semi-sphere spacing preiection in the middle part of the outer side wall of described valve body radial side, the mounting pipe inwall that this spacing preiection is corresponding is shaped with a limited impression.

Advantage of the present utility model and good effect are:

The utility model structure is simply small and exquisite, easy for installation, is arranged on gas meter and shows body inside, and make gas meter itself have combustion gas adverse current cutoff function, reliability is high, effectively can prevent the reverse circulation of air-flow, also may be used for other counterflow-preventing pipelines, is suitable for promoting.

Accompanying drawing explanation

Fig. 1 is the utility model mounting structure schematic diagram;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 cuts open enlarged diagram in the utility model;

Fig. 4 is another using state schematic diagram of Fig. 3;

Fig. 5 is the plan view of Fig. 4.

Embodiment

Below in conjunction with accompanying drawing, also by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.

The built-in thief-proof check valve of a kind of gas meter, comprise valve body 1, valve seat 6, hinged block 7 and valve plate 4, be described for direction shown in accompanying drawing 2, valve body 1 is a cylindrical tube structure, and valve body upper end is coaxially shaped with annular outer 5, and valve body lower end is made as beveled end surface, valve body lower end inwall is shaped with valve seat 6, this valve seat is the oblique planar annular flushed with valve body lower end face, and the valve seat lower end of side, below is shaped with hinged block 7, and is hinged with a valve plate 4 by this hinged block.

In order to strengthen the sealing of valve plate and valve seat, being shaped with the raised seals circle 8 of fitting with valve plate in valve seat lower end and strengthening sealing.

During installation, as shown in Figure 1 to Figure 2, the coaxial interference fit of check valve inserts mounting pipe 3 upper end, and mounting pipe upper end-hole is shaped with position limiting convex ring 2.

In order to strengthen installation accuracy, in the middle part of the outer side wall of valve body radial side, be shaped with semi-sphere spacing preiection 9, the mounting pipe inwall that this spacing preiection is corresponding is shaped with a limited impression.

Although disclose embodiment of the present utility model and accompanying drawing for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope not departing from the utility model and claims, various replacement, change and amendment are all possible, therefore, scope of the present utility model is not limited to the content disclosed in embodiment and accompanying drawing.

Claims

1. the built-in thief-proof check valve of gas meter, it is characterized in that: comprise valve body, valve seat, hinged block and valve plate, valve body is a cylindrical tube structure, valve body upper end is coaxially shaped with annular outer, valve body lower end is made as beveled end surface, and valve body lower end inwall is shaped with valve seat, and this valve seat is the oblique planar annular flushed with valve body lower end face, the valve seat lower end of side, below is shaped with hinged block, and is hinged with a valve plate by this hinged block; The raised seals circle of fitting with valve plate is shaped with in valve seat lower end.

2. the built-in thief-proof check valve of gas meter according to claim 1, is characterized in that: the coaxial interference fit of described check valve inserts mounting pipe upper end, and mounting pipe upper end-hole is shaped with position limiting convex ring.

3. the built-in thief-proof check valve of gas meter according to claim 1, is characterized in that: be shaped with semi-sphere spacing preiection in the middle part of the outer side wall of described valve body radial side, the mounting pipe inwall that this spacing preiection is corresponding is shaped with a limited impression.