CN201314386Y

CN201314386Y - Throttle stop venting valve

Info

Publication number: CN201314386Y
Application number: CNU2008201690184U
Authority: CN
Inventors: 许建文
Original assignee: Yongjia Zhengxu Valve Co Ltd
Current assignee: Yongjia Zhengxu Valve Co Ltd
Priority date: 2008-11-26
Filing date: 2008-11-26
Publication date: 2009-09-23
Anticipated expiration: 2018-11-26

Abstract

The utility model relates to a valve, in particular to a throttle stop venting valve. The valve comprise a valve body, a valve clack, a valve cover, a valve lever and a hand wheel, wherein the valve body is provided with an inflow channel and an outflow channel that respectively extend from two sides to the middle part; the middle part of the valve body is distributed up and down and is provided with a communicating hole; the communicating hole is aligned with the valve clack; the edge of the communicating hole is provided with a ring-shaped lug loss to form a valve base; a sealing surface is formed between the upper plane of the valve base and the lower plane of the valve clack; and the outer-edge chamfer angle of the upper surface of the ring-shaped valve base is a conical surface. With the adoption of the throttle stop venting valve in the process of valve closing after a medium is discharged, the medium can enter the communicating hole from the bevel (chamfer angle) of the valve base, therefore, the flow resistance coefficient is increased, and the flow speed is higher; the bevel changes the flow direction of the medium and generates vortex, and the radial force of the end surface medium of the valve base is increased, thereby realizing the open sweeping of the valve base; when the valve is closed, the sealing pair impurities can be swept cleanly, thereby ensuring the sealing property after the pollution is discharged from the valve, so as to ensure the no-leakage sealing property after pollution discharge.

Description

Throttling is by atmospheric valve

Technical field

The utility model relates to a kind of valve, specifically is that throttling ends atmospheric valve.

Background technique

Throttling by atmospheric valve is a kind of novel throttling, by, emptying product.Be widely used in making closed circuit device on the pipeline of oil, rock gas, coal gas, liquefied petroleum gas and oil refining, airport, chemical industry, oil gas accumulating etc.Throttling generally includes valve body, flap, valve gap, valve rod and handwheel by atmospheric valve, valve gap covers in the valve body upper end, handwheel is installed in the upper end of valve rod, valve gap is passed to valve pocket inside in the lower end of valve rod, flap is fixed on the lower end of valve rod, valve body is provided with respectively from middle flow channel and the flow pass that extends of two side direction, become to distribute up and down and be provided with connecting port in the valve body center, connecting port aligns with flap, the connecting port edge is provided with annular boss and constitutes valve seat, constitutes sealing surface between plane and the flap lower plane on the valve seat.But owing in the medium that flows through impurity is arranged unavoidably, therefore, thereby after date might be stained with these impurity and influence sealing effect on sealing surface when using one section, causes leakage.

The model utility content

The purpose of this utility model is to provide a kind of throttling with automatically cleaning ability to end atmospheric valve for overcoming the deficiencies in the prior art.

For achieving the above object, the utility model discloses a kind of throttling by atmospheric valve, comprise valve body, flap, valve gap, valve rod and handwheel, be provided with annular boss at the valve body middle part and constitute valve seat, constitute sealing surface between plane and the flap lower plane on the valve seat, it is characterized in that: described ring-type valve seat upper surface outer rim chamfered becomes the conical surface.

Throttling of the present utility model is in the process of atmospheric valve throttle down after the discharging of pipeline medium, medium enters connecting port from valve seat oblique angle (chamfering), flow resistance coefficient increases, flow velocity is accelerated, the oblique angle changes MEDIA FLOW to direction, produce eddy current, valve seat end face medium radial force increases, and realizes the purging of valve seat unpacking.The flap sealing pair is during near valve seat, stop the larger particles MEDIA FLOW to sealing pair with the matching gap of valve base channel, the further increase of flow velocity and the horizontal purging of medium in addition, sealing pair impurity cleans totally fully during valve closing, thereby has guaranteed that sealability after the valve blowdown guarantees further that sealability reaches not have after the blowdown and leaks.Therefore improved ability greatly and prolonged working life.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Accompanying drawing 1 is the utility model specific embodiment structure sectional view;

Embodiment

As shown in Figure 1, throttling comprises valve body 1, flap 2, valve gap 3, valve rod 4 and handwheel 14 by atmospheric valve, valve body 1 is provided with respectively from middle flow channel 5 and the flow pass 6 that extends of two side direction, become to distribute up and down and be provided with connecting port 7 in valve body 1 center, connecting port 7 aligns with flap 2, connecting port 7 edges are provided with annular boss 8 and constitute valve seat, constitute sealing surface between plane and flap 2 lower planes on the valve seat, ring-type valve seat upper surface outer rim chamfered becomes the conical surface, and the conical surface generally is advisable at 40 ° ~ 50 °.For the impurity in the filtering medium, the consideration that prevents line clogging and cause flap 2 to be not closed completely, as shown in Figure 1, throttling can be provided with tubular filter screen 9 by atmospheric valve below valve seat will isolate with flow pass 6 at the connecting port 7 at valve body 1 middle part, bottom 10 will be set simultaneously with the installation that makes things convenient for filter screen 9 with to valve body 1 cleaning inside in valve body 1 bottom.The diameter of filter screen 9 is greater than the diameter of connecting port 7, and two ends closely withstand on respectively on valve seat bottom and the bottom 10 and will isolate with flow pass 6 at the connecting port 7 at valve body 1 middle part up and down.

In addition in order further to improve sealing effect, be embedded with elastic packing plate 11 in throttling by atmospheric valve flap 2 end faces and constitute two matter sealings, the diameter of elastic packing plate 11 is greater than the diameter of connecting port 7, while is less than the external diameter of valve seat boss 8, make flap 2 hard sealing pairs on valve seat boss 8, form one hard sealing, the elastic packing plate 11 that is embedded in simultaneously on the flap 2 presses with the valve seat end face, form the sealing of second road, two matter sealing configurations have guaranteed the zero leakage of valve.Throttling in this specific embodiment also is provided with tubular valve core housing 12 by atmospheric valve, valve core housing 12 upper ends are provided with flange and are clipped between valve body 1 and the valve gap 3 valve core housing 12 is fixedly mounted in the valve body 1, spool external diameter and valve core housing 12 internal diameter liquid are movingly close, the runner that is provided with connecting valve core retainer plate 12 inner chambers and flow channel 5 in flap 2 and the valve rod 4 constitutes balanced runner, and flap 2 is worked reliable and light more under the guiding of valve core housing 12.Balanced runner can be made up of the equalizing orifice 13 that is communicated with valve rod 4 attachment holes at flap 2 centers that radially is provided with on the flap 2, and flow channel 5 passes through equalizing orifices 13 and valve rod 4 attachment holes and is communicated with valve core housing 12 inner chambers with gap between the valve rod 4.

Claims

1, a kind of throttling is by atmospheric valve, comprise valve body, flap, valve gap, valve rod and handwheel, valve body is provided with respectively from middle flow channel and the flow pass that extends of two side direction, become to distribute up and down and be provided with connecting port in the valve body center, connecting port aligns with flap, the connecting port edge is provided with annular boss and constitutes valve seat, constitutes sealing surface between plane and the flap lower plane on the valve seat, and it is characterized in that: described ring-type valve seat upper surface outer rim chamfered becomes the conical surface.

2, throttling according to claim 1 is characterized in that by atmospheric valve: described valve seat below is provided with the tubular filter screen and will isolates at the connecting port and the flow pass at valve body middle part.

3, throttling according to claim 1 and 2 is by atmospheric valve, it is characterized in that: described throttling also is provided with the tubular valve core housing by atmospheric valve, valve core housing upper end is provided with flange and is clipped between valve body and the valve gap valve core housing is fixedly mounted in the valve body, spool external diameter and valve core housing internal diameter liquid are movingly close, the runner that is provided with connecting valve core retainer plate inner chamber and flow channel in described flap and the valve rod constitutes balanced runner, and the flap end face is embedded with the elastic packing plate and constitutes two matter sealings.