With the gas self-closing valve of current-limiting apparatus
Technical field: the utility model relates to the automatic safety device that the accident such as a kind ofly prevent overpressure of gas, under-voltage, overtemperature and sebific duct from coming off, to break causes combustion gas to surpass flow revealing, and the utility model patented technology can be applicable to make pipeline gas special safety valve series product.When combustion gas occurs that superpressure, under-voltage, overtemperature and super flow leak contingency, device is closed automatically, cuts off source of the gas, prevents the generation of gas leakage and fire explosion, ensures and uses gas safety.
Background technique: along with the development of society, the extensive use of new energy, combustion gas has become industry and necessary fuel energy in life, use in gas process resident, almost there is various leakage everyday, poisoning, catch fire or the generation of explosive accident, particularly because gaseous-pressure superelevation and flexible rubber hose come off, break, that causes is poisoning, catch fire or explosive accident in the majority, have a strong impact on social harmony to stablize, the application of the utility model patent in domestic gas, effectively can prevent the generation of contingency, reduce property loss, protection life safety, improve the quality of living.
Summary of the invention: the utility model a kind ofly can leak to overpressure of gas, under-voltage, overtemperature and super flow the safety protection device that can automatically close.
For reaching foregoing invention content the technical solution of the utility model be:
One can to overpressure of gas, under-voltage, overtemperature and super flow leak the gas self-closing valve of the band current-limiting apparatus that can automatically close, by upper cover (12), lower shell body (20), diaphragm (21), annular gasket (22), lever (26), fixing pin (29), current-limiting apparatus, suction port (36), air outlet (18), enable switch, screw rod (11), screw (9), P cock, overpressure protection system, loose joint system, forward shutdown system is formed, it is characterized in that: the loose joint system that current-limiting apparatus is housed in the installing one of lower shell body (20) suction port (36) end, and match with forward shutdown system, install a forward shutdown system at loose joint system end, and match with lever (26) and fixing pin (29), between upper cover (12) and lower shell body (20), install diaphragm (21), diaphragm (21) upper end installing annular gasket (22) and enable switch match, diaphragm (21) lower end installing overpressure protection system is also matched with forward shutdown system by lever (26), installing one at upper cover (12) lower center place can automatically reset enable switch, and is matched with overpressure protection system by screw rod (11) and screw (9), at air outlet (18) end installing P cock, and match with air outlet (18).
The technical solution of the utility model also comprises:
The gas self-closing valve of described band current-limiting apparatus, is characterized in that loose joint system is made up of nut (14), movable connecting piece (34) and rubber ring (35).
The gas self-closing valve of described band current-limiting apparatus, is characterized in that forward shutdown system is shut up (31) by pass, pole shutoff (30), closes glue (32), closes spring (33) and spring detent (13) is formed.
The gas self-closing valve of described band current-limiting apparatus, is characterized in that enable switch is made up of pull-button (7), return spring (8) and spring housing (10).
The gas self-closing valve of described band current-limiting apparatus, is characterized in that overpressure protection system is made up of diaphragm fixed base (23), magnet (28), magnetic receiver (25), temperature control part (27) and locating slot (24).
The gas self-closing valve of described band current-limiting apparatus, is characterized in that P cock is made up of jump ring (1), knob (2), compression spring (3), retaining screw (4), barrel-shaped seal ring (19), closing axle (5) and pressure spring (6).
The gas self-closing valve of described band current-limiting apparatus, is characterized in that current-limiting apparatus balances muscle (16) by elastomeric closure seat (15), rubber and elastomeric closure lid (17) is formed.
Advantage of the present utility model: when the leakage of super flow, under-voltage, overtemperature or when there is super pressure because gaseous-pressure is out of control occur in combustion gas, no matter suction pressure is much, the gas self-closing valve of the utility model band current-limiting apparatus can both automatic self-closing gas, guarantees that user uses gas safety.The utility model structure is simple, and function admirable is easy to use, safety durable.
Accompanying drawing illustrates: accompanying drawing is the gas self-closing valve structural representation of band current-limiting apparatus.
Embodiment: with reference to accompanying drawing, the gas self-closing valve of the utility model band current-limiting apparatus is made up of upper cover (12), lower shell body (20), diaphragm (21), annular gasket (22), lever (26), fixing pin (29), current-limiting apparatus, suction port (36), air outlet (18), enable switch, screw rod (11), screw (9), P cock, overpressure protection system, loose joint system, forward shutdown system.Loose joint system comprises nut (14), movable connecting piece (34) and rubber ring (35); Forward shutdown system comprises shutting up (31) in pass, pole shutoff (30), closes glue (32), closes spring (33) and spring detent (13); Enable switch comprises pull-button (7), return spring (8) and spring housing (10); Overpressure protection system comprises diaphragm fixed base (23), magnet (28), magnetic receiver (25), temperature control part (27) and locating slot (24); P cock comprises jump ring (1), knob (2), compression spring (3), retaining screw (4), barrel-shaped seal ring (19), closing axle (5) and pressure spring (6); Current-limiting apparatus comprises elastomeric closure seat (15), rubber balance muscle (16) and elastomeric closure lid (17).
The gas self-closing valve of the utility model band current-limiting apparatus before use shutdown system is in closed condition, during work, pull the pull-button (7) of enable switch, shut up in pass (31) opens, combustion gas enters in housing from suction port (36), diaphragm (21) is under the effect of gaseous-pressure, upwards heave, pole shutoff (30) motion is driven by lever (26), close glue (32) shut up with pass (31) be separated, open P cock, combustion gas exports from air outlet (18), and it normally works, when gaseous-pressure superelevation, gaseous-pressure in housing raises, upwardly diaphragm (21), when diaphragm (21) tension force is greater than the linking power of diaphragm fixed base (23) and magnet (28), diaphragm fixed base (23) is separated automatically with magnet (28), lever (26) falls down, under closedown spring (33) effect, close glue (32) with pass shut up (31) close, forward shutdown system is forward closed, realize superpressure and automatically close protection, gaseous-pressure recovers normally, diaphragm fixed base (23) and magnet (28) can be connected merging automatically, gas self-closing valve with current-limiting apparatus recovers normal, when being with the gas self-closing valve Environmental Conditions temperature overtemperature of current-limiting apparatus, under the effect of temperature control part (27), magnet (28) is separated automatically with magnetic receiver (25), lever (26) falls down, under closedown spring (33) effect, close glue (32) with pass shut up (31) close, forward shutdown system is forward closed, and realizes overtemperature and automatically closes protection, when combustion gas is under-voltage, gaseous-pressure in housing sharply declines, closedown spring (33) effect under, close glue (32) with pass shut up (31) close, forward shutdown system is forward closed, and realizes the under-voltage automatic closedown protection of combustion gas, when combustion gas surpasses flow leakage, gaseous-pressure in housing sharply declines, at current-limiting apparatus with under closing spring (33) effect, close glue (32) with pass shut up (31) close, forward shutdown system is forward closed, and realizes combustion gas and surpasses the protection of flow leakage auto-closing.