CN202109042U

CN202109042U - Safety valve for combustion gas

Info

Publication number: CN202109042U
Application number: CN2011201609803U
Authority: CN
Inventors: 陈林
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-19
Filing date: 2011-05-19
Publication date: 2012-01-11
Anticipated expiration: 2021-05-19

Abstract

A safety valve for combustion gas comprises a valve body with an inner chamber. The valve body is provided with an air inlet channel and an air outlet channel. The inner chamber is internally provided with a rubber skin layer which divides the inner chamber to an upper chamber and an expansion chamber. A rod member is fixed on the rubber skin layer. The air inlet channel is communicated with an air inlet which is provided in the expansion chamber. The expansion chamber is internally provided with a lever which has a back end that is connected with the rod member. The front end of the lever is provided with a sealing surface which can seal the air inlet. The valve body is provided with a pressure adjusting device and an adjusting member. The air outlet channel is communicated with an air outlet of the expansion chamber through a piston chamber. The piston chamber is internally provided with a magnetic piston. An air gap is provided between the piston and the piston chamber. The air outlet is provided with a magnetic member which is attracted with the piston. A transition inner edge is provided between the air outlet channel and the piston chamber. One side of the piston is provided with a sealing surface which seals the air outlet when the piston is combined with the air outlet, and the other side is provided with a sealing edge which seals the inner edge when the piston is combined with the inner edge. The safety valve for combustion gas can provide safe and comprehensive protection for the pipeline combustion gas.

Description

Safety valves for gas

Technical field

The utility model relates to a kind of safety valve, the safety valve that especially a kind of pipeline gas uses.

Background technique

Often use pipeline gas as the energy in daily production, the life, and using and managing of, toxic gas inflammable and explosive to these need be noticed especially, otherwise be easy to take place security incident.To this problem, on gas pipeline, can be equipped with safety valve usually, however present safety valve; It is strong inadequately that most function singleness, accident are taken precautions against ability, only plays the effect that prevents overpressure like one type of pressure regulator wherein; And another kind of common electromechanics combination safety valves for gas, then cost of production and user cost are higher, and need energising to use; Having a power failure does not then have protective action, and the electronic component probe is prone to contaminatedly cause malfunctioningly, so its using scope is restricted.It is thus clear that, seek more advantages of simple of a kind of structure, applied widely, and complete function, safe and reliable Piping Safety Valves is necessary.

Summary of the invention

It is a kind of simple and reasonable that the purpose of the utility model is to provide, and protective function is comprehensive, Ou Nuo safe and reliable safety valves for gas of signal.

The utility model is that the technological scheme that its technical problem of solution is adopted is:

Safety valves for gas comprises the valve body of being with inner chamber, and valve body is provided with the gas-entered passageway and the outlet passageway of communication with cavity; Be provided with the rubber cortex in the said inner chamber, the rubber cortex is isolated into upper chamber and expansion chamber with inner chamber, and expansion chamber is communicated with air inlet, outlet passageway; Be fixed with rod member on the rubber cortex; Said gas-entered passageway is communicated with the suction port that is positioned at expansion chamber, is provided with coupling bar in the said expansion chamber, and lever is installed on the coupling bar; Lever rear end is connected with rod member, and the lever front end has can press down the sealing surface that seals up suction port; Said valve body is provided with the regulator that is used to adjust pressure that expansion chamber bears, and the adjustment piece that is used to drive rod member; Said outlet passageway is communicated in the air outlet of expansion chamber through piston cavity; Be provided with magnetic piston in the piston cavity; Be provided with air gap between piston and the piston cavity, the air outlet is provided with the magnetic of inhaling mutually with piston, is provided with bead in the transition between outlet passageway and the piston cavity; Piston one side seals up the sealing surface of air outlet when being provided with and combining with the air outlet, the sealing edge of bead in opposite side seals up when being provided with and combining with interior edge.

Valve body is provided with the screw mouth that is communicated to upper chamber; Said regulator comprises the look nut that is installed on screw mouth, and adjustment piece wears and is installed on the look nut, and its end is fixed in the rubber cortex outside; The rod member correspondence is fixed in the inboard of rubber cortex, and it axially axially overlaps with adjustment piece; Be provided with the pressure spring of adjustment piece being pressed to the rubber cortex between look nut and the adjustment piece.

The beneficial effect of the utility model is: the utility model can be realized stopping the supple of gas or steam closing automatically, and gas equipment is stopped using and closed automatically, and overcurrent and pipe leakage are closed automatically; Adverse current is closed automatically, and undercurrent is under-voltage closes automatically, regulates functions such as pressure flow; It adopts mechanical structure, advantages of simple, and using effect is good; Protective function is comprehensive, can safety be provided for pipeline gas, comprehensively protection.

Description of drawings

Further explain below in conjunction with accompanying drawing and embodiment:

Fig. 1 is the cross-sectional view of the utility model;

Fig. 2 is the structural representation of first kind of state of the utility model;

Fig. 3 is the structural representation of second kind of state of the utility model;

Fig. 4 is the structural representation of the third state of the utility model;

Fig. 5 is the structural representation of the 4th kind of state of the utility model;

Fig. 6 is the structural representation of the 5th kind of state of the utility model.

Embodiment

With reference to Fig. 1, the safety valves for gas that the utility model provided comprises the valve body 1 of being with inner chamber; Valve body 1 is provided with the gas-entered passageway 11 and outlet passageway 12 of communication with cavity, and valve body 1 can be made up of two-part or many parts shell amalgamation sealing, its inner inner chamber that forms; Between the shell of phase amalgamation, can press from both sides and establish fixedly rubber cortex 2, make rubber cortex 2 be positioned at inner chamber, and inner chamber is isolated into upper chamber 13 and expansion chamber 21; Wherein, Expansion chamber 21 is communicated with gas-entered passageway 11, outlet passageway 12, and 13 of upper chamber and gas-entered passageway 11, outlet passageway 12 are isolated, and makes that so expansion chamber's 21 one of formation can be with the space of pressure expansion or contraction; Be fixed with rod member 22 on the rubber cortex 2, make rod member 22 to change the position along with the expanded size of expansion chamber 21; Gas-entered passageway 11 is communicated with the suction port 111 that is positioned at expansion chamber 21, is provided with coupling bar 23 in the expansion chamber 21, hinged installation lever 3 on the coupling bar 23; Make lever 3 to rotate as fulcrum with coupling bar 23, lever 3 rear ends are connected with rod member 22, when so making rod member 22 motions in expansion chamber 21 because of pressure expansion or contraction; Can drive lever 3 rear ends rotates along coupling bar 23; And lever 3 front ends have the sealing surface 31 that cooperates with suction port 111, therefore can under the driving of rod member 22, make sealing surface 31 press down and seal up suction port 111; Or rising separates with suction port 111, reaches the purpose of controlling air inlet, stablizing air pressure.

In the utility model; Valve body 1 is provided with regulator 4 and adjustment piece 41, and wherein the purpose of regulator 4 is to be used to adjust 21 pressure that can reach of expansion chamber, so can adjust the air capacity of expansion chamber 21; Dwindle when gas lacks hypotony, to receive the external world or the pressure of upper chamber 13; Or when gas multiple pressure power is too high, expand towards upper chamber's 13 extruding, and the purpose of adjustment piece 41 then is to be used to drive rod member 22; Make the people can directly control rod member 22 independently movings and come driving lever 3 and piston 51, and then the unlatching of control suction port 111 or close.

In the utility model, outlet passageway 12 is communicated in the air outlet 121 of expansion chamber 21 through piston cavity 5, is provided with magnetic piston 51 in the piston cavity 5; Be provided with air gap between piston 51 and the piston cavity 5, make when piston 51 is positioned within the piston cavity 5, can guarantee that gas passes through from air gap; Guarantee the unobstructed circulation of gas, air outlet 121 is provided with the magnetic of inhaling mutually with piston 51 123, for example shown in the figure; Can be for being distributed in the annular around the outstanding air outlet 121, so just can be attracted the sealing surface 511 of fitting piston 51 during near air outlet 121 at piston 51; Can seal up air outlet 121, make air-flow path close; In addition, be provided with bead 52 in the transition between outlet passageway 12 and the piston cavity 5, the sealing of bead 52 was along 512 in corresponding piston 51 sealed up when being provided with and combining with interior edge 52; And in order not conflict mutually with air gap; The bottom end that can shown in figure, adopt piston 51 along 512, and is designed to the inclined-plane form with it as sealing, corresponding in bead 52 also be designed to ramp structure; This structure is when the air pressure of outlet passageway 12 is excessive; Bead 52 places in can piston 51 being pushed to make the interior bead 52 of piston 51 sealed up by sealing edge 512, stop to give vent to anger.

Optimal way as the utility model; Valve body 1 is provided with the screw mouth 14 that is communicated to upper chamber 13, and said regulator 4 comprises the look nut 42 that is installed on screw mouth 14, pressure spring 43; And can count adjustment piece 41 in; Wherein adjustment piece 41 wears and is installed on the look nut 42, and its end is fixed in rubber cortex 2 outsides, and rod member 22 correspondences are fixed in the inboard of rubber cortex 2; Can use mode and rubber cortex 2 matching and fixing such as nut, pad, make rod member 22 axially axially overlap with adjustment piece 41; Be provided with the pressure spring 43 of adjustment piece 41 being pressed to rubber cortex 2 between look nut 42 and the adjustment piece 41; Under this structure, the user pushes adjustment piece 41, can act on the rod member 22; Make rod member action in whole expansion chamber 21, piston cavity 5, with the switch of control suction port 111; And owing to adjustment piece 41 acts on the rubber cortex 2 from the outside; Pressure spring 43 offers the pressure of adjustment piece 41 towards expansion chamber 21, makes expansion chamber's 21 internal pressures with pressure spring 43 pressure and barometric pressure sum balance the time, and expansion chamber 21 just can not expand or dwindle; Therefore rotating look nut 42 can adjust its position; Cooperate pressure spring 43, the pressure of 41 pairs of expansion chamber 21 of may command adjustment piece, and then make expansion chamber 21 need bigger pressure or littler pressure; Realize and the balance of ambient pressure, so promptly realized adjustment expansion chamber's 21 pressure.

In addition, can be with rod member 22 ends corresponding to 121 places, air outlet, when compressing adjustment piece 41 presses down rod member 22; Stretch into air outlet 121; When control suction port 111 is opened, can be used for making that with separating the circulation passage of gas is unimpeded fully with piston 51 that air outlet 121 is pulled together.Adjustment piece 41 ends can be provided with handle 411, are convenient to people's manual control.

In addition, for guaranteeing when going out atmospheric pressure or flow and be higher than certain value, piston 51 just combines with interior bead 52 and seals up outlet passageway 12; Can between piston 51 and outlet passageway 12, set up load spring 53, load spring 53 needn't be connected with piston 51, therefore is higher than internal pressure for ambient pressure; Force the situation of piston 51 away from outlet passageway 12 and load spring 53, unfettered between the two, but excessive in internal pressure; Compressing piston 51 is during near outlet passageway 12; Can combine with load spring 53, so receive the opposition of load spring 53, until internal pressure during greater than the pressure of load spring 53; Can make piston 51 seal up interior bead 52 fully, make outlet passageway 12 close.Through screw thread overcurrent adjusting nut 54 is installed in the outlet passageway 12, load spring 53 can be between overcurrent adjusting nut 54 and piston 51.

The utility model can be applicable in the pipe natural gas, also can in bottled gas, use, and gas-entered passageway 11 is connected on the inlet end of pipeline in use, and outlet passageway 12 is connected on the inlet end of gas equipment.Its function roughly can be classified as follows:

Under gas equipment or gas equipment one duct closed condition; Owing to the pressure of expansion chamber 21 expands greater than ambient pressure, rod member 22 rollbacks also drive lever 3 and seal suction port 111, and since the valve inner carrier about in the of 51 two chamber pressure differences reduce; 121 1 lateral movements of piston 51 pressurizeds towards the air outlet; And receive magnetic attraction and seal up air outlet 121 at the suitable distance place, valve is closed condition, and is as shown in Figure 2.

After gas equipment is opened,, and can cooperate staff suction port 111 and air outlet 121 to be opened by adjustment piece 41 by gas-entered passageway 11 pressure outside effects; Gas can pass through valve smoothly; Flowed out by outlet passageway 12, supply with gas equipment and normally use, its state is as shown in Figure 3.

When going out entraining air stream when excessive, piston about in the of 51 two chamber pressure reduction increase, compressing piston 51 makes piston 51 compressing load springs 53; And and move in bead 52 places, seal up along 512 by sealing, gas continues to get into expansion chamber 21 simultaneously, expansion chamber continues to expand; Drive rod member 22 rollbacks, and drive lever 3 and seal suction port 111, valve integral body is closed condition; Can not continue to get into or flow out circulated gases, reach overvoltage or overcurrent protection, its state is as shown in Figure 4.

When gas equipment one side air pressure is equal to or greater than the air pressure of air inlet one side; Piston 51 121 moves towards the air outlet along piston cavity 5; And influenced by magnetic force and be pulled together in suitable distance, air outlet 121 is stopped up, so just can prevent back flow of gas; The gas that guarantees the storage of gas equipment one side does not run off, and its state is as shown in Figure 5.

When suction pressure was excessive, expansion chamber 21 continued to expand, and drove moving rod member 22 rollbacks; And drive lever 3 and seal suction port 111, expansion chamber's 21 internal pressures can not continue to increase, and overvoltage gas can release from outlet passageway 12; Reach the decompression purpose, its state is as shown in Figure 6.

It is thus clear that, the utility model after setting and be installed on the pipeline, its stable performance of reducing pressure; Output pressure can be regulated, and gas equipment can cut off the gas leakage situation that gas circuit prevents pipeline and gas equipment when stopping using automatically, and can realize that overcurrent cuts off gas circuit automatically; Prevent the pipeline gas leakage that comes off; This is external when stopping the supple of gas or steam, not having gas, back flow of gas, can also automatically shut down, and prevents to come suddenly the gas leakage under the vaporous condition.

Claims

1. safety valves for gas; Comprise the valve body (1) of being with inner chamber, valve body (1) is provided with the gas-entered passageway (11) and the outlet passageway (12) of communication with cavity, it is characterized in that: be provided with rubber cortex (2) in the said inner chamber; Rubber cortex (2) is isolated into upper chamber (13) and expansion chamber (21) with inner chamber; Expansion chamber (21) is communicated with air inlet, outlet passageway (11,12), is fixed with rod member (22) on the rubber cortex (2), and said gas-entered passageway (11) is communicated with the suction port (111) that is positioned at expansion chamber (21); Be provided with coupling bar (23) in the said expansion chamber (21); Lever (3) is installed on the coupling bar (23), and lever (3) rear end is connected with rod member (22), and lever (3) front end has can press down the sealing surface (31) that seals up suction port (111); Said valve body (1) is provided with the regulator (4) that is used to adjust expansion chamber (21) pressure that bears, and the adjustment piece (41) that is used to drive rod member (3); Said outlet passageway (12) is communicated in the air outlet (121) of expansion chamber (21) through piston cavity (5); Be provided with magnetic piston (51) in the piston cavity (5); Be provided with air gap between piston (51) and the piston cavity (5); Air outlet (121) is provided with the magnetic of inhaling mutually with piston (51) (123); Be provided with bead (52) in the transition between outlet passageway (12) and the piston cavity (5), piston (51) one sides are provided with the sealing surface (511) that seals up air outlet (121) with air outlet (121) when combining, and opposite side is provided with the sealing edge (512) that seals up interior bead (52) with interior edge (52) when combining.

2. safety valves for gas according to claim 1; It is characterized in that: said valve body (1) is provided with the screw mouth (14) that is communicated to upper chamber (13); Said regulator (4) comprises the look nut (42) that is installed on screw mouth (14), and adjustment piece (41) wears and is installed on the look nut (42), and its end is fixed in rubber cortex (2) outside; Rod member (22) correspondence is fixed in the inboard of rubber cortex (2), and it axially axially overlaps with adjustment piece (41); Be provided with the pressure spring (43) of adjustment piece (41) being pressed to rubber cortex (2) between look nut (42) and the adjustment piece (41).

3. safety valves for gas according to claim 2 is characterized in that: said rod member (22) is terminal to be located corresponding to air outlet (121).

4. according to claim 1 or 2 or 3 described safety valves for gas, it is characterized in that: be provided with load spring (53) between said piston (51) and the outlet passageway (12).

5. according to claim 1 or 2 or 3 described safety valves for gas, it is characterized in that: said adjustment piece (41) end is provided with handle (411).

6. safety valves for gas according to claim 4 is characterized in that: through screw thread overcurrent adjusting nut (54) is installed in the said outlet passageway (12), said load spring (53) is positioned between overcurrent adjusting nut (54) and the piston (51).