CN201262256Y

CN201262256Y - Constant pressure deflation valve

Info

Publication number: CN201262256Y
Application number: CNU2008200420046U
Authority: CN
Inventors: 桑春; 徐元富; 陈学虎; 陆从明
Original assignee: YANCHENG CAIYANG ELECTRICAL VALVE CO Ltd
Current assignee: JIANGSU XINCAIYANG ELECTROMECHANICAL TECHNOLOGY CO., LTD.
Priority date: 2008-07-22
Filing date: 2008-07-22
Publication date: 2009-06-24
Anticipated expiration: 2018-07-22

Abstract

The utility model relates to a constant pressure deflation valve. On the basis of the prior structure of the valve, a spring sleeve is arranged on the periphery of a spring; the lower head of the spring sleeve is connected with a valve seat; a sealing ring is arranged on the outer periphery of the upper head of the spring sleeve and assembled in a stepped hole in an inner cavity of the valve body; a discharge hole is formed on the lower part of the spring sleeve, which is in the upward position of a sealing thread of the valve seat; a sealing element is arranged on the bottom of a valve rod, where the spring is assembled; the outer periphery of the sealing element is matched with an inner hole of the spring sleeve so that the spring sleeve is in the close state in the cavity part where the spring is arranged; a sewage connector is arranged on the valve body and communicated with the inner cavity of the valve body. In the utility model, the spring sleeve and the sealing part are added, the spring is in the close state, does not eroded by a medium and keeps inherent feature, so that the spring can normally perform the constant pressure deflation function, and the service life of the valve is effectively improved. The addition of the sewage connector solves the sewage blockage problem so that the valve can perform due functions.

Description

Valve discharging gas under certain pressure

Technical field:

The utility model relates to a kind of valve, especially a kind of valve discharging gas under certain pressure.

Background technique:

Oil-gas ratio content be everlasting at present than on the higher wellhead assembly valve discharging gas under certain pressure being housed, this serial valve discharging gas under certain pressure is mainly used in submerged electric oil pump well, rationally control wellhead assembly pressure, stop the generation of the underload termination of pumping phenomenon that submersible electric pump causes because of gas lock, guarantee the normal operation of submersible electric pump.The valve discharging gas under certain pressure of present prior art, its inlet union is connected with the outlet socket of wellhead assembly, its working principle is: when the gas-liquid pressure in the wellhead assembly is focused to setting value, wash valve rod open, make the conical seal (contact) face of valve rod break away from sealing surface of seat, valve opening makes gas (liquid) discharging in the wellhead assembly.When wellhead assembly pressure descends and drops to setting value when following, valve rod resets under the effect of spring, two sealing surfaces reseal, in use there are two big defectives in this valve: the one, and spring is in the state of exposing, accelerate with the direct contact corrosion speed of medium, thereby cause spring can't reach the effect of modulation in advance in use for some time, the 2nd, because spring directly contacts with medium, dive when fluid and to stay when being condensed into dirt in the body cavity, make spring not have due effect, even with the level pressure of destructive valve self venting function.

The model utility content

The purpose of this utility model is to provide a kind of long service life that makes valve, can overcome the valve discharging gas under certain pressure of above-mentioned two big defectives effectively.

For achieving the above object, the technological scheme that the utility model adopted is: this valve discharging gas under certain pressure comprises import, inlet union, valve body, test interface, valve seat, valve rod, spring, adjustable lever, outlet connection, outlet, seal arrangement, handlebar is characterized in that: the periphery at spring is furnished with spring overcoat, following of spring overcoat is connected on the valve seat, and the higher authorities' periphery of spring overcoat is furnished with Sealing, fits in the made step hole of body cavity; The bottom of spring overcoat upwards is provided with the discharge orifice that communicates with body cavity in the place being positioned at valve base sealing line mouth; Valve rod is furnished with Sealing in mounted elastically bottom, and the periphery of Sealing matches with the spring overcoat endoporus, makes spring overcoat be in sealing state at the inner chamber of being furnished with spring; On valve body, is furnished with the blowdown interface that communicates with body cavity.

Described a kind of valve discharging gas under certain pressure is characterized in that: inlet union, outlet connection are made as one of structural type of flange plate or thimble connector.

The utility model beneficial effect compared with prior art:

1. increase spring overcoat and Sealing, make spring be in closed state, be not subjected to the erosion of medium, remain inherent feature, make spring in use, can normally bring into play level pressure venting function, the working life of having improved valve effectively;

2. increase the blowdown interface device, the cohesion fluid dirt that is produced when making work can directly be discharged by the blowdown interface, has solved the dirt blocking problem, makes valve bring into play due effect.

Description of drawings:

Fig. 1 is the plan view of this valve;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the another kind of example structure figure of Fig. 1 middle outlet joint;

Fig. 4 is an A place partial enlarged view among Fig. 1.

Among the figure:

1. import, 2. inlet union, 3. valve body, 4. test interface, 5. valve seat, 6. valve rod, 7. Sealing, 8. spring overcoat, 9. spring, 10. adjustable lever, 11. outlet connections, 16. outlet, 17. clips, 18. thimble connectors, 19. bolt, 20. blowdown interfaces, 21. discharge orifices, 22. seal arrangement, 23. handlebars, 24. body cavities.

Embodiment:

Describe the utility model in detail below in conjunction with accompanying drawing:

This valve discharging gas under certain pressure comprises this valve original structure as import 1, inlet union 2, valve body 3, test interface 4, valve seat 5, valve rod 6, spring 9, adjustable lever 10, outlet connection 11, outlet 16, seal arrangement 22, handlebar 23.This patent one is to be furnished with spring overcoat 8 in the periphery increase of spring 9 on the original structure basis, and following of spring overcoat 8 is by being threaded on the valve seat 5, and the higher authorities' periphery of spring overcoat 8 is furnished with Sealing 7, fits in the made step hole of body cavity; The bottom of spring overcoat 8 upwards is provided with the discharge orifice 21 that communicates with body cavity 24 in the place being positioned at valve seat 5 potted line mouths; Valve rod 6 is furnished with Sealing 7 in the bottom of assembling spring 9, and the periphery of Sealing 7 matches with spring overcoat 8 endoporus, makes spring overcoat 8 be in sealing state at the inner chamber of being furnished with spring 9; The 2nd, on valve body 3, be provided with the blowdown interface 20 that communicates with body cavity 24, the structure of this blowdown interface 20 is identical with test interface 4 structures.

Above-mentioned inlet union 2, outlet connection 11 can be made as one of structural type of flange plate or thimble connector 18.Inlet union 2 as shown in Figure 1, outlet connection 11 are first embodiment, what adopt is the form of flange plate structure, the seal groove inner seal liner 7 that is provided with on the card of flange plate is connected with the outlet socket 15 that is made as the flange plate structure form equally by bolt 19; That shown in Figure 3 is another example structure figure, what its joint adopted is thimble connector 18 structural types, the seal groove inner seal liner 7 that on the disk of thimble connector 18 sides, is provided with, the structural type identical with thimble connector 18 is made in outlet socket 15, periphery conical surface in thimble connector 18, outlet socket 15 is furnished with clip 17, is furnished with bolt 19 on the opening fillet of clip 17 and tightens up.

Claims

1, a kind of valve discharging gas under certain pressure comprises import (1), inlet union (2), valve body (3), test interface (4), valve seat (5), valve rod (6), spring (9), adjustable lever (10), outlet connection (11), outlet (16), seal arrangement (22), handlebar (23) is characterized in that: be furnished with spring overcoat (8) in the periphery of spring (9), following of spring overcoat (8) is connected on the valve seat (5), the higher authorities' periphery of spring overcoat (8) is furnished with Sealing (7), fits in the made step hole of body cavity; The bottom of spring overcoat (8) upwards is provided with the discharge orifice (21) that communicates with body cavity (24) in the place being positioned at valve seat (5) potted line mouth; Valve rod (6) is furnished with Sealing (7) in the bottom of assembling spring (9), and the periphery of Sealing (7) matches with spring overcoat (8) endoporus, makes spring overcoat (8) be in sealing state at the inner chamber of being furnished with spring (9); On valve body (3), is furnished with the blowdown interface (20) that communicates with body cavity (24).

2, a kind of valve discharging gas under certain pressure according to claim 1 is characterized in that: inlet union (2), outlet connection (11) are made as one of structural type of flange plate or thimble connector (18).