CN2189248Y

CN2189248Y - Low pressure gas pipeline equalising valve

Info

Publication number: CN2189248Y
Application number: CN 93244657
Authority: CN
Inventors: 高培荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-11
Filing date: 1993-11-11
Publication date: 1995-02-08
Anticipated expiration: 2003-11-11

Abstract

The utility model relates to a middle pressure-low pressure safety pressure regulating valve for civil gas pipelines, composed of a safety cut-off device, a pressure regulating system and an energy-saving magnetizing device. A current limiting cavity is formed among the on switch of the cut-off device, a current limiting and adjusting turnbuckle, a magnetizing device and a ball for sealing. Glass balls are arranged in the cavity; the glass balls can rise up to cut off gas flow to ensure safety, when gas is overrated. In the pressure regulating system, a piston can be pushed by a lever to close an air inlet duct, when pressure is increased; rated value can be adjusted according to different types of gases. The utility model has the advantages of stable pressure regulation and big rated flow.

Description

Low pressure gas pipeline equalising valve

The utility model relates to the valve that a kind of gas pipeline uses.Particularly a kind of civilian have safe pressure regulating energy-saving function in-low pressure valve.

At present, the low pressure house lead in is adopted in the combustion gas of China's civil pipeline.The low pressure house lead in has several point defects, at first is that the mounting material amount is big, and expense is also high, particularly the installation of tall building; Secondly because pressure is low, when the user with the gas peak time, discharge pressure reduces greatly, influence user's use; The 3rd is to set up terminal voltage regulating station, promptly wants construction fund, also wants land occupation, and needs the personal management.

Purpose of design of the present utility model is exactly at above-mentioned deficiency, provide a kind of pipeline transmission ﹠ distribution that are applicable to various civil pipeline combustion gas such as artificial coal gas, rock gas, oil gas, liquefied petroleum gas high efficiency, low cost in-low pressure regulating pressure valve.Safety cut-out device and magnetization energy-saving device are housed simultaneously, so that pressure regulator valve has greater functionality.

The technological scheme of realization the utility model purpose of design is made up of safety cut-out device, voltage-regulating system and magnetization energy-saving device, this three part also can be used separately respectively according to function separately, the connection switch on device top is the telescoping structure that spring is housed, and the current limliting of bottom is adjusted and is formed the current limliting chamber between screw mandrel and airintake direction magnetizing assembly and the ball sealing, one piece of glass marble is arranged in the chamber, between chamber and the nozzle ball sealing is arranged; Voltage-regulating system has voltage regulation diaphragm, supporting plate, spring, connecting rod, lever etc., lever is connected with piston pin hole, have 2-4 airslide above the piston, piston is in conduit, the two ends of pressure regulator valve all are connected with gas pipeline, conduit and inlet end connecting thread are one, being threaded on the valve body of conduit outside.

Magnetization energy-saving device among the design has been used a magnetization energy-saving device patent of finishing before me, and its patent No. is 92224387.5.The magnetization energy-saving device can magnetize the combustion gas of process, makes gas molecule more careful, improves combustion efficiency, has promptly saved the energy and has reduced atmospheric pollution again.

Safety cut-out device of the present utility model is the major technique feature, gas with various rating value (air demand) difference, and gas is through detecting its flow velocity before the safety cut-out device whether in rating value.Enter surge-chamber through nozzle again, surge-chamber is adjusted to rating value with pressure automatically, to reach stable output and decompression pressure regulation purpose.The rating value of gas with various is such: artificial coal gas 1500～1800Pa; Liquefied petroleum gas 3000～3500Pa; Rock gas 2000～2500Pa; Oil gas 3000～3500Pa.

Safety cut-out device is to limiting the quantity of through gas, and its current limliting amount is adjusted screw mandrel by current limliting and adjusted.Revolve then specified current limliting amount inwards and reduce, otherwise then increase.Its specified current limliting amount adjustment can be used for the gas with various requirement according to the user is set up by the workman before product export, also can adjust definite according to the different requirements of the local gas user rating of the same race of difference.The cut-out of safety cut-out device is according to the wind-tunnel principle design by the glass marble in the chamber.Behind the gas flow rate overrate, gas flow produces pressure difference at the glass marble upper and lower surface, and glass marble rises because of overcoming action of gravity, just the air inlet road is cut off because of the Driving force of air-flow is close on the ball sealing again.After the situation of eliminating danger, manually press the connection switch, gas circuit is just open-minded, so forms a safety cut-out device.

Safety cut-out device can sebific duct occur and come off when using combustion gas, can cut off source of the gas automatically when cracking or breaking out of fire in 2 seconds.Malfunctioning or when the above earthquake disaster of level Four takes place if pressure regulation takes place when service time after long afterwards, all can cut off source of the gas immediately, take place to prevent fire accident.

In the regulator of the present utility model, voltage regulation diaphragm, supporting plate, spring, all working principle of connecting rod are identical with existing reduction valve know-why.The lever tail end is sleeved in the swallow-tail form hole on the connecting rod, and also upwards action simultaneously of the tail end of lever when connecting rod upwards moves then produces forward Driving force at the front end of lever, promotes piston advances forward.One end of piston has pin-and-hole to locate movable the connection with lever at this.When the valve body internal pressure reached maximum and closes power, piston had moved to nozzle location forward in conduit, intake duct is totally-enclosed; If the rear portion pipeline was in and used gaseity this moment, when the valve body internal pressure reduced, under the pressure of pressure adjusting spring, the pressure-regulating device inner carrier is motion round about again.And so forth, reach and stablize pressure regulation to combustion gas tool air feed.

Piston has 2-4 Qian shape airslide according to gas with various, and its fluting quantity and sectional area are determined according to specified air demand.Its air demand is respectively: rock gas 2.5M ³/ h; Artificial coal gas 4.5M ³/ h; Liquefied petroleum gas 2.0M ³/ h; Oil gas 2.0M ³/ h.

Piston is in conduit, and conduit and inlet end connecting thread are one, being threaded on the valve body of conduit outside, and the two ends of pressure regulator valve all link to each other with gas pipeline.

The utility model generally is loaded on the preceding gas pipeline of user's gas gauge table.

Safety cut-out device of the present utility model, voltage-regulating system, magnetization energy-saving device three parts are combined in one and play pressure regulation, safety, energy-conservation effect in the design.Also can use separately as required, form separately function respectively and separately use.Pressure regulation also can be used for any industry, domestic gas pressure regulation separately; Safety cut-out device also can be applied to any gas pipeline separately and carry; The magnetization energy-saving device also can be used for any inflammable gas magnetization aspect.

The utility model pressure regulation is stable, rated flow is big, can satisfy the needs of Modern Family with combustion gas.Owing to install the magnetization energy-saving device additional, dissimilar burning of gas heat are imitated improve 2-8%.

Below in conjunction with accompanying drawing the design is described in further details.

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is the combination schematic representation of piston and conduit in the voltage-regulating system;

Accompanying drawing 3 is a piston schematic representation in the voltage-regulating system;

Accompanying drawing 4 is the piston cross-section schematic representation, also is the embodiment piston schematic representation of the utility model for oil liquid human relations gas application.

Sequence number is represented respectively in the accompanying drawing:

Valve body 1; Upper press cover 2; Pressure regulation connecting rod 3; Pressure regulation lever 4; Voltage regulation diaphragm 5; Diaphragm support plate 6; Pressure adjusting spring 7; Rag iron spring 8; Hold-down plate spring cap 9; Pin 10; Pressure regulating screw 11; Pad 12; Set screw 13; Dust cap 14; Pressure regulation spring cap 15; Wrist pin 16; Lever pin 17; Piston 18; Rubber pad 19; Connect switch 20; Copper mesh 21; Magnetization energy-saving device 22; Glass marble 23; Current limliting is adjusted screw mandrel 24; Ball sealing 25; Transfer bar sealing cap 26; Conduit 27.

Can have gained some understanding to the design's overall picture referring to accompanying drawing 1.

Valve body 1 is a die-cast metal spare, is the basic element of character.Settled many parts in the upper press cover 2, the caudal peduncle suit of swallow-tail form hole and lever 4 is arranged at the bottom of pressure regulation connecting rod 3, and the swallow-tail form hole can make lever 4 that enough move places are arranged.Voltage regulation diaphragm 5 when gas pressure increases and supporting plate 6 upwards heaved (being lifted) by gas by gas, when heaving, the down pressure drivening rod 3 that overcomes pressure adjusting spring 7 is upwards action also.Voltage regulation diaphragm 5, supporting plate 6, rag iron spring 8, hold-down plate spring cap 9, pin 10 are connecting rod ASSYs of combining with connecting rod 3, so the upwards action simultaneously when gas pressure increases of bar assembly.Pad 12, set screw 13 are fixed on dust cap on the upper press cover 2.Pressure regulating screw 11 and pressure regulation spring cap 15 are manufacturer is used for regulating pressure adjusting spring 7 at the gas with various type according to customer requirement before dispatching from the factory pressure sizes.Wrist pin 16 is active connections of lever 4 and piston 18.Lever pin 17 plays truck dead lever 4.Piston 18 is vitals, when connecting rod 3 upwards moves, the tail end that lever 4 is sleeved in the connecting rod 3 swallow-tail form holes also moves up simultaneously, front end generation thrust promotion piston 18 forward at lever 4 travels forward, when the valve body internal pressure reaches to maximum closing pressure, also produce maximum thrust piston 18 is moved to nozzle location forward in conduit 27, intake duct is shut, if the rear portion pipeline is in and uses gaseity at this moment, when the valve body internal pressure reduces, under the pressure of pressure adjusting spring 7, pressure-regulating device inner carrier 18 is motion round about again, freely drives air flue into.So repeatedly reciprocal in the whole air feed process, reach and stablize pressure regulation to combustion gas tool air feed.Rubber pad 19 seals at intake duct and piston plug place.Connect switch 20 and be used for recovering the usefulness of ventilating.The current limliting adjustment screw mandrel 24 of connecting switch 20 and bottom also has formation current limliting chamber between magnetization energy-saving device 22 and the ball sealing 25, and glass marble 23 is arranged in the chamber, and its working principle and effect front are narrated.When glass marble 23 be close on the ball sealing 25 the air inlet road cut off after, when fault is excluded, dangerous situation is removed the back and just glass marble 23 is depressed with manually pressing connection switch 20, can make gas circuit open-minded.It is telescopic connecting switch 20, has spring that outer cover is resetted after manually pressing glass marble 23 between about tube, and switch base, pad, spill cushion rubber are combined in addition to connect switch 20.Copper mesh 21 plays filtering gas and prevents that foreign material from entering effect.Magnetization energy-saving device 22 is that a permanent magnet can magnetize, make it to burn more abundant to gas.Glass marble 23 is made by simple glass, but requires the garden degree higher, plays the blockage body effect.Current limliting is adjusted screw mandrel 24 can be to limiting the quantity of through gas, and the adjustment of its specified current limliting amount can be used for inhomogeneity gas according to the user and require to set up before product export, loads onto sealing cap 26 after the setting and can protect current limliting to adjust screw mandrel 24.Ball sealing 25 is used for fitting tightly with glass marble 23 and is sealed into air flue.Conduit 27 is guide grooves of piston 18, also is the joint of inlet end.Conduit 27 is an one with the inlet end connecting thread, being threaded on the valve body of conduit 27 outsides.

Fig. 2 is the combination schematic representation of piston and conduit in the voltage-regulating system, by the combination that can more be clear that places such as piston 18 and conduit 27 among the figure than Fig. 1.

Fig. 3 is a piston schematic representation in the voltage-regulating system.Section partly shows the inner side position of piston 18 air inlet ducts.

Fig. 4 is the schematic cross-section of piston.It also is embodiment's piston schematic representation that the utility model is used for the liquefied petroleum gas body.At first, the quantity and the specified air demand size of piston 18 airslide of opening have relation, and the fluting number is at 2-4.Because all kinds of differences of gas, its specified air demand are also different; Secondly, the sectional area and the air inflow of the airslide of opening are in close relations above the piston 18, and after the specified air demand of similar gas was determined, air inlet duct sectional area and air inflow (flow) size had direct relation.The specified air demand of all kinds of civilian inflammable gass is narrated in front.Present embodiment is applied to liquefied petroleum gas.Its airslide is opened two grooves, and the position is in the diagram left and right sides, and its sectional area is 8mm ²* 2 amount to 16mm ², under like this air inlet duct quantity and sectional area, its maximum closing pressure in 3500Pa, specified air demand 2.5M ³, be 2800Pa in the rated flow downforce.

Claims

1, a kind of with in the civil pipeline combustion gas-low-pressure safety valve, by safety cut-out device, voltage-regulating system and magnetization energy-saving device are formed, and it is characterized in that:

A. the connection switch on shut-off means top is the telescoping structure that spring is housed, and forms the current limliting chamber between the current limliting of bottom adjustment screw mandrel and airintake direction magnetizing assembly and the ball sealing, and one piece of glass marble is arranged in the chamber, between chamber and the nozzle ball sealing is arranged;

B. voltage-regulating system has voltage regulation diaphragm, supporting plate, spring, connecting rod, lever etc., and lever is connected with piston pin hole, has 2-4 airslide above the piston, and piston is in conduit.

2, in according to claim 1-and low pressure regulating pressure valve, it is characterized in that the two ends of pressure regulator valve all are connected with gas pipeline.Conduit and inlet end connecting thread are one, being threaded on the valve body of conduit outside.