CN201401539Y

CN201401539Y - Valve rod component used in safety relief valve bank

Info

Publication number: CN201401539Y
Application number: CN2009200452376U
Authority: CN
Inventors: 黃亦仁
Original assignee: PHYSICAL AGROFORESTRY MACHINERY SCIENCE AND TECHNOLOGY(SUZHOU) CO Ltd
Current assignee: PHYSICAL AGROFORESTRY MACHINERY SCIENCE AND TECHNOLOGY(SUZHOU) CO Ltd
Priority date: 2009-05-12
Filing date: 2009-05-12
Publication date: 2010-02-10
Anticipated expiration: 2019-05-12

Abstract

The utility model discloses a valve rod component used in a safety relief valve bank. The valve rod component comprises a valve rod and an elastic piece, wherein the elastic piece is arranged at the top end of the valve rod; and a terminal member is arranged at the bottom part of the valve rod. The valve rod component is characterized in that the terminal member at the bottom part of the valve rodtakes the sphere shape, and the top end of the spheral terminal member is closely matched with the deflecting surface of a valve port. In the utility model, as the terminal member is designed into the sphere shape, and the equal-diameter curved surface is closely well matched with the valve port, the safety and reliability for starting and stopping the valve can be ensured, and the abrasion for the terminal member can be reduced, furthermore, the service life of the valve is effectively prolonged, and the leakage phenomenon can be reduced.

Description

Be used for the valve rod assembly in the safety relief valve group

Technical field

The utility model relates to a kind of Decompression valves, is specifically related to a kind of valve rod assembly that is used in the safety relief valve group, the release connection of pipeline of control valve tool water-in and water-out.

Background technique

In order to make the spraying high-pressure water flow reach voltage stabilizing output when the water outlet, and after preventing to close use, pressure is higher in the pipeline, the terminal bad situation of dripping that still has of output, usually on the circulation pipeline of facility, dispose safety valve or the Decompression valves that voltage stabilizing is used, in time discharge conduit pressure inside.

Generally, no matter be safety valve or the bleeder valve that level pressure or voltage stabilizing are used, open and close the valve rod assembly of controlling usefulness by one, shown in the 5th, six figure, comprise that valve rod reaches the elastic component in order to the ejection valve rod, the bottom of valve rod 20 is used to seal termination part 22 parts of valve port 21, be set as three-dimensional taper head, utilize cooperating of the oblique surface of awl and valve port 21 peristomas, according to awl tiltedly guiding do forward plug-connected type closing cock tightening position, reach the sealing of the pipeline that circulates.The termination of valve rod is generally tack end face 23 shapes, its ring footpath is slightly less than the peristoma than valve port 21, makes whole awl splay end head spare 22 can partly be inserted into the inner edge of valve port 21, is jam-pack formula closed shape, the ejection force that cooperates the top elastic component reaches the plug-connected type sealing of stability and safety.

Yet, when pressing the height conversion frequency higher in the pipeline that inserts, or the instantaneous pressure conversion is when excessive, because elastic component is arranged at the top of valve rod 20, under the action of hydrodynamic pressure conversion ejection, switching motion regular meeting causes the beat displacement of valve rod 20, especially boring the oblique top end is tack end face 23, resistance when more having increased switching motion, with the pressure conversion inequality that causes cone-shaped end spare 22 both sides to be subjected to, regular meeting forms the irregular of micro-deflection shape and plugs together, because irregular deflection, when high as if the conversion frequency number of times, regular meeting causes the scratch out-of-flatness on the awl inclined-plane, cause the sealing deficiency that forms between awl inclined-plane and the valve port 21, produce and leak image, especially when using poisonous or control than the fluid of tool contaminativity, just need frequent replacing valve group, not only cause the inconvenience in the use, more form the increase of user cost, and the problem that produces environmental pollution; Moreover because the top of valve rod 20 awl splay end head spares 22 is flat end face, resistance becomes big when making switching motion, can make the sound of switching motion very big on the one hand, can cause on the other hand to open and close the delay situation of controlling, and the sensitivity of switching motion is affected.

Summary of the invention

The utility model purpose provides a kind of valve rod assembly that is used in the safety relief valve group, by the improvement to structure, the sealing effect in the time of can guaranteeing closure is avoided the leakage phenomenon that causes because of wearing and tearing, improve the sensitivity that keying is controlled, reach the break-make of the pilot line current of safety and stability.

For achieving the above object, the technical solution adopted in the utility model is: a kind of valve rod assembly that is used in the safety relief valve group, comprise valve rod, and be arranged at the elastic component of valve stem tip, the bottom of described valve rod is provided with the termination part, the termination part of described stem bottom is sphere-like, and this part top, sphere-like termination cooperates with the tilted guide surface of valve port is airtight.

In the technique scheme, the sphere diameter of described termination part is greater than the bore of valve port.

Above, described valve rod assembly is installed in the safety relief valve group, and under the variation in pressure in inserting pipeline, the elastic force that overcomes elastic component opens and closes the pressure release valve port.Described elastic component is arranged at the top of valve rod, the bottom of body is provided with sphere-like termination part, and this termination part cooperates with the tilted guide surface at valve port place is airtight, thereby under the variation in pressure in flowing into pipeline, do to open and close the operation of valve port, and then the safety of the flow passage of releasing is opened and closed control.Wherein, because the termination part is sphere-like, the surface is isometrical curved surface, both be when hydrodynamic pressure conversion valve rod generation beat moves, arcuate surface still can be fitted airtightly with tilted guide surface, has more the effect from normal moveout correction, effectively reduces the wearing and tearing to the termination part, improve consequent leakage phenomenon, guarantee the security and stability of safety relief valve group work; Simultaneously, the termination part of sphere-like, when opening and closing operation, the resistance that is subjected to is less, can guarantee the valve rod assembly accuracy of action, and can reduce noise.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:

1, the termination part owing to stem bottom in the utility model is a sphere-like, cooperate by isometrical curved surface and valve port are airtight, both be to press conversion to make valve rod that the skew swing take place in the pipe, arcuate surface still can keep good closed-loop operation with valve port, guarantees that the valve tool opens and closes the security and stability of operation;

2, because the termination part is sphere-like, when valve rod produces the skew swing with the pressure conversion, from normal moveout correction, effectively reduce wearing and tearing to the termination part by himself arcuate surface, improve consequent leakage phenomenon, prolong the working life of valve tool;

3, the termination part is sphere-like, and arcuate surface is compared with tack surface in the past, and the resistance of switching motion reduces, and can guarantee the valve rod accuracy of action, improves valve tool controllability and sensitivity.

Description of drawings

Fig. 1 is the utility model embodiment one user mode decomposing schematic representation;

Fig. 2 is the cross-sectional schematic after Fig. 1 assembles;

Fig. 3 is the structural representation of valve rod among Fig. 2;

Fig. 4 is the local enlarged diagram when pressing beat to move in valve rod is subjected among Fig. 2;

Fig. 5 is the structural representation of valve rod in the prior art;

Fig. 6 is the local enlarged diagram when valve rod presses beat to move in being subjected among Fig. 5.

Wherein: 10, body; 11, elastic component; 12, the water channel of releasing; 13, valve port; 131, tilted guide surface; 14, valve rod; 15, termination part; 20, valve rod; 21, valve port; 22, termination part; 23, tack end face.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: extremely shown in Figure 4 referring to Fig. 1, a kind of valve rod assembly that is used in the safety relief valve group, comprise valve rod 20, and be arranged at the elastic component 11 on valve rod 20 tops, the bottom of described valve rod 20 is provided with termination part 15, this termination part 15 is sphere-like, and diameter is greater than the bore of valve port 13,131 airtight cooperations of tilted guide surface of termination part 15 tops of sphere-like and valve port 13.

As Fig. 1, shown in 2, present embodiment is installed in the valve tool body 10 of safety relief valve group, compress the valve rod 14 that seals the water channel 12 intermediate connection valve ports 13 of releasing by elastic component 11 elasticity, close valve port 13 by termination, body of rod top part 15 plugs, the termination part is spheroid round end shape (referring to shown in Figure 3), circular sphere diameter cooperates with the taper peristoma tilted guide surface 131 of valve port 13, and be slightly larger than valve port 13, cambered surface design by sphere, the water channel 12 of releasing that holds out against the sealing circulation that can be safe and firm, the sealing of control flows waterway be communicated with, after valve rod 14 tops and elastic component 11 are done the location assembling,, just can seal being communicated with of release flow passage and valve port 13 by the elastic force ejection of elastic component 11, the water channel 12 of releasing is formed interrupt shape, for inserting normally advancing of pipeline, the circulation of water outlet; When interrupt or body 10 internal pressure values increase to (the elastic force values of body 10 inner ejection elastic components 11) when setting safety value the waterexit end of inserting pipeline, be subjected to the back-pressure ejection, to make valve rod 14 break away from valve port 13 positions of sealing, form and open the duct that is communicated with, the flow passage of releasing is opened, and when comparatively safe value was arrived in body 10 internal drops, then valve rod spare 14 was subjected to the restoring force of elastic component 11, will turn back to the applying position of sealing valve port 13 once more.When elastic recovery, utilize the spheroid arcuate surface, can fit with the tilted guide surface 131 of valve port 13, reach the operation of sealing completely, make things convenient for the continuous operation of compression pump.

In the present embodiment; the termination part 15 of described valve rod 14 is set as sphere structure; the characteristic that it is maximum; the subsides that promptly are not limited to the awl inclined-plane are touched; but with the identical sphere diameter curved surface of spheroid; when pressing instability in the valve group body 10; when especially producing the disturbance situation because of the pressure conversion; it is abnormal flexible that elastic component 11 takes place the pressure of conversion; so that form the displacement (as shown in Figure 4) of beat; the termination part 15 of valve rod 14 was conical in the past; because it is the slippage regular meeting of beat forms the sealing of deflection shape and conflicts (as shown in Figure 6), so that can cause plug to close the leakage situation of not fitting, right with the spherosome termination part in the present embodiment; the surface of its whole termination part 15 is isometrical curved surface; when elastic component 11 when beat moves a little, the faying surface that valve rod 14 plugs close still can be identical isometrical applying valve port 13, especially cooperates the spheroid face; have more effect, make the keying valve port operation of valve rod 14 safer stable from normal moveout correction.And, when the termination part is made closed procedure, its action of closing will be more sensitive, and the suffered resistance of arc shaped surface is less, can guarantee valve rod 14 accuracy of actions, thereby significantly reduce the noise that produces when opening and closing, make the action control of whole valve group reach quiet effect, relative, the operational failure rate of valve group also can significantly lower, effectively reduce the wear phenomenon that opens and closes when controlling, improve issuable leakage problem when using, more meet environmental protection requirement.

Claims

1. one kind is used for the interior valve rod assembly of safety relief valve group, comprise valve rod (20), and be arranged at the elastic component (11) on valve rod (20) top, the bottom of described valve rod (20) is provided with termination part (15), it is characterized in that: the termination part (15) of described valve rod (20) bottom is sphere-like, the airtight cooperation of tilted guide surface (131) of this sphere-like termination part (15) top and valve port (21).

2. the valve rod assembly that is used in the safety relief valve group according to claim 1, it is characterized in that: the sphere diameter of described termination part (15) is greater than the bore of valve port (21).