CN2599351Y

CN2599351Y - Gas pressure regulating valve

Info

Publication number: CN2599351Y
Application number: CNU022866930U
Authority: CN
Inventors: 陶月苗
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-09
Filing date: 2002-12-09
Publication date: 2004-01-14
Anticipated expiration: 2012-12-09

Abstract

A gas adjusting valve includes an upper valve (1) and a lower valve (2) which are recombined together and is divided into two cavities by a membrane (5); a spring (4) is positioned in the upper cavity, of which the upper end meeting with the lower end of the knob (3) of the upper valve (1), and the lower end meeting the upper surface of the membrane (5) by a tray (52); the outlet channel (23) of the lower valve is communicated with the lower cavity. The utility model is characterized in that an inlet channel (21) of the lower valve extends to the center of the lower cavity and bends into a vertical and upwards outlet pipe (22); a needle valve core (6) is positioned in the outlet pipe (22) with the valve top downward, and the outer wall and the inner wall of the outlet pipe (22) form sealed space; the tail of a valve stem (61) extends upwards and meets the lower surface of the membrane (5) by a tray (51). The utility model skillfully combine the current valve cores and membrane, so as to greatly improve the response speed, which not only realizes automatic adjusting of the pressure and flow at the outlet, but also makes sure the closing pressure is lower than 3.50 Kpa specified by relevant national standard. Meanwhile, the above design provides simpler structure and has lower manufacturing cost.

Description

A kind of gas pressure regulating valve

Technical field

The utility model relates to a kind of pressure regulator valve, particularly a kind of pressure regulator valve that is applied to gas transmission and distribution systems such as liquefied petroleum gas (LPG), coal gas, rock gas.

Background technique

Existing gas pressure regulating valve adopts epithelium as pressure regulatory element more, as the patent No. is that disclosed technological scheme all is like this in " gas pressure regulator, governor " of ZL97201684.8 (notification number CN2295084) and " LPG (liquefied petroleum gas) pressure regulator " that the patent No. is ZL94228414.3 (notification number is CN2191336), and their common defects is, only with epithelium as pressure regulatory element, and epithelium is sensitive inadequately for the response fluctuation of pressure, cause the output flow of pressure regulator valve to change greatly, therefore pressure transient is worked as gas cooker and is switched big, in, little when fire DeGrain; Equally, also because this structural defective, make that closing pressure still is higher than the 3.50Kpa of national Specification, becomes the potential safety hazard in the practical application when spacing output peak rate of flow.

Closing pressure:When closing the pressure governor outlet valve, when flow was zero, the steady pressure value that the pressure governor outlet is reached was called closing pressure.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of at above-mentioned prior art present situation can make rapid adjustment automatically and guarantee output flow and outlet pressure gas pressure regulating valve stably the variation of inlet pressure.

Another technical problem to be solved in the utility model is the gas pressure regulating valve that is not more than 3.50Kpa that closing pressure can meet national Specification when spacing output peak rate of flow.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: this gas control valve includes upper valve body and following valve body, both are laminated with one relatively and are separated into two chambers by epithelium, in upper chamber, be provided with a spring, its upper end offsets with the knob lower end that is arranged on the upper valve body, the upper surface of its lower end one pallet and epithelium offsets, the outlet passageway of following valve body is communicated with lower chambers, it is characterized in that the following gas-entered passageway of valve body extends to the central position of lower chambers always and is bent to form straight up a steam outlet pipe, one needle valve valve inside is arranged in this steam outlet pipe with valve port attitude down, and constitute sealing between its outer wall and the steam outlet pipe inwall, the afterbody of its valve rod extends upward and offsets through the lower surface of a pallet and epithelium.

Described needle valve valve inside can adopt the valve inside on existing bicycle or the motorcycle tire, even can directly purchase acquisition, as adopting disclosed structure in the ZL92207397.X model utility " pneumatic tire valve inside ", only valve rod wherein need be extended out from afterbody and get final product, its concrete structure is: include valve body and valve rod, valve body hollow, valve rod therefrom passes, one spring is positioned at valve body, be enclosed within outside the valve rod, one end withstands on the interior step of valve body front end, the other end then withstands on the protuberance at valve rod middle part, the afterbody of valve rod stretches out outside the valve body afterbody, and head then is fixed with the core print seat that is positioned at outside the valve body, be provided with in it one can with the sealing gasket of valve body oral area sealing.

Described valve inside can be threaded with the inwall of steam outlet pipe mutually with the screw thread on its outer wall; For the convenience of installing, described valve body afterbody also can be connected with a bonnet, at this moment, can be carved with the screw thread that is connected with the steam outlet pipe inner thread at its outer wall.

Sealing between described valve inside outer wall and the steam outlet pipe inwall can realize by the seal ring that is arranged on the valve inside outer wall.

Described knob can be enclosed within outside the middle bump of upper valve body, and is threaded with the center hole of upper valve body by its central projection, described spring upper end promptly be fixed on knob central boss end take over a business to offset.

The utility model in use, under normal conditions, valve inside is in opening state, become big as inlet pressure, then epithelium is by jack-up, and the valve rod of valve inside is up thereupon under the effect of its Returnning spring, so the valve port gap smaller between the sealing gasket of valve rod lower end and the valve body oral area, thereby the minimizing air inflow makes still held stationary of outlet pressure; Diminish and work as inlet pressure, then epithelium is replied downwards, the valve rod of valve inside is at its effect lower compression Returnning spring and up down, so it is big that the valve port gap between the sealing gasket of valve rod lower end and the valve body oral area becomes, thereby increase air inflow, makes still held stationary of outlet pressure: and when the outlet of valve is in closed condition, then epithelium is pushed up to upper limit, at this moment, valve inside will be in closed condition fully, thereby guarantee that closing pressure is lower than the 3.50Kpa of NBS defined.The utility model has utilized existing valve inside dexterously, and it and epithelium collaborative work make reaction velocity improve greatly, not only realized the automatic adjusting of outlet pressure and flow, and structure are more simple on the contrary, and manufacture cost is also lower.

Description of drawings

Fig. 1 is the utility model embodiment's a schematic appearance.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the partial enlarged drawing at valve inside 6 positions among Fig. 2.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1～shown in Figure 3, this gas control valve includes upper valve body 1 and following valve body 2, one knob 3 is enclosed within outside the middle bump of upper valve body 1, and is threaded with the center hole of upper valve body by its central projection 31, and one takes over a business 32 by the lower end of screw at projection 31;

Both are relative is laminated with one and is separated into two chambers by epithelium 5 for upper valve body 1 and following valve body 2, in upper chamber, be provided with a spring 4, its upper end offsets with knob 3 lower ends that are arranged on the upper valve body 1, its lower end offsets through the upper surface of top tray 52 with epithelium 5, the outlet passageway 23 of following valve body 2 is communicated with lower chambers, the gas-entered passageway 21 of following valve body extends to the central position of lower chambers always and is bent to form straight up a steam outlet pipe 22, one needle valve valve inside 6 is arranged in this steam outlet pipe 22 with valve port attitude down, and its outer wall is by constituting sealing between seal ring 65 and steam outlet pipe 22 inwalls, and the afterbody of its valve rod 61 extends upward and offsets through the lower surface of pallet 51 and epithelium 5 down.

As shown in Figure 3, described needle valve valve inside concrete structure is: include valve body 64 and valve rod 61, valve body 64 hollows, valve rod 61 therefrom passes, and a spring 66 is positioned at valve body, be enclosed within outside the valve rod 61, one end withstands on the interior step 67 of valve body 64 front ends, and the other end then withstands on the protuberance 62 at valve rod middle part, and the afterbody of valve rod 61 stretches out outside valve body 64 afterbodys, head then is fixed with the core print seat 69 that is positioned at outside the valve body 64, be provided with in it one can with the sealing gasket 68 of valve body 64 oral areas sealings.Valve body 64 is connected with a bonnet 63, and its outer wall is carved with the screw thread that is connected with steam outlet pipe 22 inner threads.

Claims

1, a kind of gas control valve, include upper valve body (1) and following valve body (2), both are laminated with one relatively and are separated into two chambers by epithelium (5), in upper chamber, be provided with a spring (4), its upper end offsets with knob (3) lower end that is arranged on the upper valve body (1), its lower end one pallet (52) offsets with the upper surface of epithelium (5), the outlet passageway of following valve body (23) is communicated with lower chambers, it is characterized in that the following gas-entered passageway (21) of valve body extends to the central position of lower chambers always and is bent to form straight up a steam outlet pipe (22), one needle valve valve inside (6) is arranged in this steam outlet pipe (22) with valve port attitude down, and constitute sealing between its outer wall and steam outlet pipe (22) inwall, the afterbody of its valve rod (61) extends upward and offsets through the lower surface of a pallet (51) with epithelium (5).

2, gas control valve according to claim 1, it is characterized in that described needle valve valve inside (6) includes valve body (64) and valve rod (61), valve body (64) hollow, valve rod (61) therefrom passes, one spring (66) is positioned at valve body (64), be enclosed within outside the valve rod (61), one end withstands on the interior step (67) of valve body (64) front end, the other end then withstands on the protuberance (62) at valve rod (61) middle part, the afterbody of valve rod (61) stretches out outside valve body (64) afterbody, head then is fixed with the core print seat (69) that is positioned at outside the valve body (64), be provided with in it one can with the sealing gasket (68) of valve body (64) oral area sealing.

3, gas control valve according to claim 1 and 2 is characterized in that described valve inside (6) is threaded mutually with the inwall of the screw thread on its outer wall with steam outlet pipe (22).

4, gas control valve according to claim 3 is characterized in that valve body (64) afterbody of described valve inside also is connected with a bonnet (63), and its outer wall is carved with the screw thread that is connected with steam outlet pipe (22) inner thread.

5, gas control valve according to claim 1 and 2 is characterized in that the sealing between described valve inside (6) outer wall and steam outlet pipe (22) inwall realizes by the seal ring (65) that is arranged on valve inside (6) outer wall.

6, gas control valve according to claim 1 and 2, it is characterized in that described knob (3) is enclosed within outside the middle bump of upper valve body (1), and be threaded with the center hole of upper valve body (1) by its central projection (31), promptly terminal take over a business (32) offset with being fixed on knob central boss (31) in described spring (4) upper end.