CN208719372U - A kind of city gas safety valve - Google Patents

Abstract

The utility model discloses a kind of city gas safety valves, including being disposed with inlet chamber, the first cushion chamber, the first venthole, inlet chamber, air inlet, the second cushion chamber and discharge chamber by discharge directions in valve body, filler and valve body, valve rod is provided in second cushion chamber, the valve rod is penetrated in circular groove by the circular hole being arranged on the upside of the second cushion chamber, flap is fixedly mounted in the lower end of the valve rod, is inserted in the circular groove and compresses annulus.Compress maintenance annulus downwards by nut, so that the annulus that compresses of downside compresses downwards filler, the thin filler of pine is compacted again, keep the sealing effect of original pair of valve body of filler, the inner upper end of the second cushion chamber is in close contact by rubber articulated pipe upper port, it limits the combustion gas inside the first cushion chamber to be discharged upwards from air inlet, closing of the rubber hemispherical to air inlet upper inside walls and upper port, so that flap greatly improves the sealing effect of air inlet.

Description

A kind of city gas safety valve

Technical field

The utility model relates to safety valve technical field, specially a kind of city gas safety valve.

Background technique

Safety valve is that opening and closing element is in normally off under by external force, is surpassed when the pressure medium in equipment or pipeline increases When crossing specified value, by outside system discharge medium come to prevent pressure medium in pipeline or equipment be more than the particular usage valve of specified value Door.

Existing safety valve is rotated up and down movement by valve rod, and flap is driven to move up and down, thus realize flap closure and Air inlet is opened, to the function to logical realization opening and closing of inlet chamber and discharge chamber, to carry out on-off to combustion gas, while on valve body Side have a tightly packed filler space, prevent combustion gas from revealing upwards from circular hole, but Shortcomings in place of have: when filler with Valve rod rotates upwardly and downwardly cooperation for a long time, and filler is substantially graphite Si powder, and long-term friction has the thin sign of pine, and it is solid to fill space It is fixed, so that the big heavy discount of valve seal.

Utility model content

The purpose of this utility model is to provide a kind of city gas safety valves, to solve the valve mentioned in background technique The problem of body closure is gradually deteriorated.

To achieve the above object, the utility model provides the following technical solutions: a kind of city gas safety valve, including valve Inlet chamber, the first cushion chamber, the first venthole, inlet chamber, air inlet are disposed with by discharge directions in body, filler and valve body Hole, the second cushion chamber and discharge chamber are provided with valve rod in second cushion chamber, and the valve rod on the upside of the second cushion chamber by setting The circular hole set penetrates in circular groove, and flap is fixedly mounted in the lower end of the valve rod, is inserted in the circular groove and compresses annulus, described to fill out Material is pressed in circular groove by compressing annulus, and described compress is provided with maintenance annulus on annulus, and the valve rod, which is inserted, compresses annulus And it is pierced by maintenance annulus, the outer rim of the maintenance annulus is equipped with positioning round orifice, and the valve body is equipped with screw rod, and the screw rod passes through Positioning round orifice is pierced by maintenance annulus and upper end is by nut locking, and the upper end of the maintenance annulus is provided with dome, the dome The external screw thread that internal thread hole threaded engagement valve rod upper end is arranged is arranged by it for upper end, and the upper end of the valve rod is equipped with spinner handle.

Preferably, the upper end outer rim of the flap is equipped with rubber articulated pipe, and the upper end of rubber articulated pipe compresses contact second The inner upper end of cushion chamber.

Preferably, spring is cased on the downside of the screw rod.

Preferably, rubber hemispherical is equipped in the middle part of the lower end of the flap, on the inner wall of rubber hemispherical sliding contact air inlet Side.

Compared with prior art, the utility model has the beneficial effects that first, compress maintenance annulus downwards by nut, So that the annulus that compresses of downside compresses downwards filler, the thin filler of pine can be compacted again, keep original pair of valve body of filler Sealing effect solves the problems, such as that valve body closure is deteriorated, second, pass through rubber articulated pipe upper port and is in close contact the second buffering The inner upper end of chamber limits the combustion gas inside the first cushion chamber and is discharged upwards from air inlet, and rubber hemispherical is in air inlet upside The closing of wall and upper port also solves flap to air inlet upper end so that flap greatly improves the sealing effect of air inlet The problem of mouth sealing effect difference.

Detailed description of the invention

Fig. 1 is the main view local cutting schematic diagram of the utility model；

Fig. 2 is the positioning round orifice distribution schematic diagram of the utility model；

Fig. 3 is the flap elevational schematic view of the utility model.

In figure: 1 valve body, 2 inlet chambers, 3 first cushion chambers, 4 first ventholes, 5 second cushion chambers, 6 air inlets, 7 exhausts Chamber, 8 second ventholes, 9 circular grooves, 10 circular holes, 11 valve rods, 12 flaps, 13 rubber articulated pipes, 14 fillers, 15 compress annulus, 16 solid Circle of position ring, 17 positioning round orifice, 18 screw rods, 19 springs, 20 nuts, 21 domes, 22 internal thread holes, 23 external screw threads, 24 spinner handles, 25 rubbers Glue hemisphere.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In the description of the present invention, it should be understood that term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ", The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" be based on Orientation or positional relationship shown in the drawings is merely for convenience of description the utility model, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

Fig. 1 and Fig. 2 are please referred to, the utility model provides a kind of technical solution: a kind of city gas safety valve, including valve Inlet chamber 2, the first cushion chamber 3, the first venthole 4, air inlet are disposed with by discharge directions in body 1, filler 14 and valve body 1 Chamber 2, air inlet 6, the second cushion chamber 5 and discharge chamber 7, valve rod 11 is provided in the second cushion chamber 5, and valve rod 11 passes through the second buffering The circular hole 10 being arranged on the upside of chamber 5 penetrates in circular groove 9, and flap 12 is fixedly mounted in the lower end of valve rod 11, when flap 12 leaves air inlet 6 When upper port, combustion gas is drained by inlet chamber 2, the first venthole 4, the first cushion chamber 3, the second cushion chamber 5 and the second venthole 8 It in discharge chamber 7, is inserted in circular groove 9 and compresses annulus 15, filler 14 is pressed in circular groove 9 by compressing annulus 15, compresses annulus Maintenance annulus 16 is provided on 15, valve rod 11, which is inserted, to compress annulus 15 and be pierced by maintenance annulus 16, and the outer rim of maintenance annulus 16 is set There is positioning round orifice 17,10 inner wall of circular hole and 11 fit clearance of valve rod are 500 microns, compress annulus 15 with the cooperation of valve rod 11 gap and are 400 microns, and outside and the 9 inner wall gap of circular groove for compressing annulus 15 are 500 microns, the lower end stabilization for compressing annulus 15 is pressed on The upside of filler 14 is screwed down screw rod 18 by nut 20, so that nut 20 presses downwards maintenance annulus 16, so that supporting Annulus 15 is pressed to compress filler 14 downwards, so that filler 14 and valve rod 11,9 inner wall of circular groove and the cooperation of 10 upper port of circular hole are close, and Filler 14 uses silicon powder and ball-type graphite powder to concoct with the ratio of ratio 1:2, and filler 14 has silicon powder and ball-type graphite powder Exquisiteness so that compress after 14 gas confining of filler it is fine, and filler 14 succession ball-type graphite powder dry friction lubricity, make Obtaining it will not influence 11 normal rotation of valve rod, and valve body 1 is equipped with screw rod 18, and screw rod 18 is pierced by maintenance annulus by positioning round orifice 17 16 and upper end locked by nut 20, the upper end of maintenance annulus 16 is provided with dome 21, and 21 upper end of dome passes through the interior spiral shell of its setting The upper end of the external screw thread 23 of 22 threaded engagement valve rod of pit, 11 upper end setting, valve rod 11 is equipped with spinner handle 24, by rotating spinner handle 24, So that the external screw thread 23 of valve rod 11 is rotated up and down movement in internal thread hole 22, flap 12 is driven to move up and down, operates flap 12 The upper port of air inlet 6 is closed or opened, to operate safety valve opening and closing.

Refering to fig. 1, the upper end outer rim of flap 12 is equipped with rubber articulated pipe 13, and rubber articulated pipe 13 is compressive state at this time, Compressing power to the inner upper end of the second cushion chamber 5 is 12 newton, is in close contact the second buffering by 13 upper port of rubber articulated pipe The inner upper end of chamber 5 limits the combustion gas inside the first cushion chamber 3 and is discharged upwards from air inlet 6, and the upper end of rubber articulated pipe 13 is supported The inner upper end of the second cushion chamber of press contacts 5.

Refering to fig. 1 and Fig. 3, the lower end middle part of flap 12 are equipped with rubber hemispherical 25, and rubber hemispherical 25 have as quality Elasticity, it is compressible, and when rubber hemispherical 25 is caught in 6 inner wall of air inlet, it is compressive state, by rubber hemispherical 25 to air inlet 6 The closing of upper inside walls and upper port, so that flap 12 greatly improves the sealing effect of air inlet 6, the sliding of rubber hemispherical 25 is connect On the upside of the inner wall for touching air inlet 6.

When the utility model is specifically implemented: valve rod 11 ought be made to be rotated up and down movement by rotating spinner handle 24 for a long time, make At 9 inner stuffing 14 of circular groove wear pine dredge, and cause it is bad to 11 upper port sealing effect of circular hole, by rotating clockwise nut 20, nut 20 compresses downwards maintenance annulus 16, so that the annulus 15 that compresses of downside compresses downwards filler 14, the filler that pine can be dredged 14 are compacted again, keep the sealing effect of 14 original pairs of valve bodies of filler 1, are in close contact the by 13 upper port of rubber articulated pipe The inner upper end of two cushion chambers 5 limits the combustion gas inside the first cushion chamber 3 and is discharged upwards from air inlet 6, passes through rubber hemispherical 25 Closing to 6 upper inside walls of air inlet and upper port, so that flap 12 greatly improves the sealing effect of air inlet 6.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (4)

1. successively being set in a kind of city gas safety valve, including valve body (1), filler (14) and valve body (1) by discharge directions Be equipped with inlet chamber (2), the first cushion chamber (3), the first venthole (4), inlet chamber (2), air inlet (6), the second cushion chamber (5) and Discharge chamber (7), it is characterised in that: be provided with valve rod (11) in second cushion chamber (5), the valve rod (11) is slow by second It rushes the circular hole (10) being arranged on the upside of chamber (5) to penetrate in circular groove (9), flap (12) are fixedly mounted in the lower end of the valve rod (11), institute It states to be inserted in circular groove (9) and compress annulus (15), the filler (14) is pressed in circular groove (9) by compressing annulus (15), institute It states to compress and be provided on annulus (15) maintenance annulus (16), the valve rod (11), which is inserted, to compress annulus (15) and be pierced by maintenance annulus (16), the outer rim of the maintenance annulus (16) is equipped with positioning round orifice (17), and the valve body (1) is equipped with screw rod (18), the spiral shell Bar (18) is pierced by maintenance annulus (16) by positioning round orifice (17) and upper end is locked by nut (20), the maintenance annulus (16) Upper end be provided with dome (21), dome (21) upper end pass through its be arranged internal thread hole (22) threaded engagement valve rod (11) on The external screw thread (23) of setting is held, the upper end of the valve rod (11) is equipped with spinner handle (24).

2. a kind of city gas safety valve according to claim 1, it is characterised in that: outside the upper end of the flap (12) Edge is equipped with rubber articulated pipe (13), and the upper end of rubber articulated pipe (13) compresses the inner upper end of contact the second cushion chamber (5).

3. a kind of city gas safety valve according to claim 1, it is characterised in that: the downside of the screw rod (18) covers There are spring (19).

4. a kind of city gas safety valve according to claim 2, it is characterised in that: in the lower end of the flap (12) Portion is equipped with rubber hemispherical (25), on the upside of the inner wall of rubber hemispherical (25) sliding contact air inlet (6).