CN203248742U - Stop valve - Google Patents
Stop valve Download PDFInfo
- Publication number
- CN203248742U CN203248742U CN 201320286173 CN201320286173U CN203248742U CN 203248742 U CN203248742 U CN 203248742U CN 201320286173 CN201320286173 CN 201320286173 CN 201320286173 U CN201320286173 U CN 201320286173U CN 203248742 U CN203248742 U CN 203248742U
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- Prior art keywords
- valve
- cylinder
- stop
- face
- chamber
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Abstract
The utility model discloses a stop valve. According to the stop valve, in the moving direction of a piston valve core, the area for bearing fluid pressure of a first end face of the piston valve core is larger than the area for bearing the fluid pressure of a second end face of the piston valve core; a left by-pass channel enabling an inlet and a first cavity to be communicated, a right by-pass channel enabling an outlet and the first cavity to be communicated, a first control valve used for controlling the closing or opening of the left by-pass channel, and a second control valve used for controlling the closing or opening of the right by-pass channel are additionally arranged; the first control valve and the second control valve are both small-bore valves relative to the stop valve, and the stop valve is a large-bore valve; the closing or opening of the large-bore valve is controlled through the controlling of the small-bore valves by means of the pressure difference of a medium itself; due to the fact that the small-bore valves can be controlled with small driving torque and the power source used by the small-bore valves to control the large-bore valve is the fluid medium itself, the purposes of saving energy, reducing consumption and reducing production cost are achieved.
Description
Technical field
The utility model relates to the stop valve field, more particularly, relates to a kind of stop valve.
Background technique
In the prior art, having the stop valve that opens and closes function generally is comprised of valve body, spool, valve seat and opening/closing mechanism.Open-shut device wherein mainly is comprised of spool, valve rod and drive unit.The driving lower valve rod band movable valve plug of drive unit near or lift off a seat, to realize cut-off or the conducting of stop valve.
But for some heavy caliber stop valves, the pressure ratio of the medium of the stop valve of flowing through is larger, in the situation that pressure medium is larger, want directly to realize cut-off or the conducting of stop valve, just need larger driving moment to overcome the pressure of medium, drive valve core movement.And larger driving moment needs very large energy consumption, thereby has caused the raising of cost of production.
Therefore, how to design a kind of stop valve, this stop valve is in the situation that pressure medium is larger, only need less driving moment, just can realize the opening and closing of stop valve, thereby reach energy-saving and cost-reducing, the purpose that reduces production costs is the critical problem that those skilled in the art need to be resolved hurrily.
The model utility content
The purpose of this utility model provides a kind of heavy caliber stop valve, this stop valve is in the situation that pressure medium is larger, only need less driving moment, just can realize the opening and closing of stop valve, thereby reach energy-saving and cost-reducing, the purpose that reduces production costs is the critical problem that those skilled in the art need to be resolved hurrily.
For achieving the above object, the utility model provides following technological scheme:
A kind of stop valve comprises:
Comprise valve body, piston valve core, valve gap and valve seat, described piston valve core is divided into mutually disconnected the first chamber and the second chamber with the inner chamber of described valve body, described the first chamber is with respect to the close described valve gap in described the second chamber, the export and import that cooperatively interacts conducting or cut-out valve body of described piston valve core and described valve seat
End face near described valve gap on the described piston valve core is the first end face, end face away from described valve gap is the second end face, has the stop bit projection on described the first end face, when described stop bit projection and described valve gap offset, on the moving direction of described piston valve core, bear the useful area of fluid pressure on described the first end face greater than the useful area that bears fluid pressure on described the second end face;
End face near described valve gap on the described piston valve core is the first end face, end face away from described valve gap is the second end face, has the stop bit projection on described the first end face, when described stop bit projection and described valve gap offset, on the moving direction of described piston valve core, bear the area of fluid pressure on described the first end face greater than the area that bears fluid pressure on described the second end face;
Also comprise:
The left by-pass that can be communicated with described import and described the first chamber;
Be used for controlling the first control valve of described left by-pass conducting or cut-off;
The right by-pass that can be communicated with described outlet and described the first chamber;
Be used for controlling the second control valve of described right by-pass conducting or cut-off.
Preferably, described piston valve core is formed by connecting by the first cylinder and second cylinder of coaxial arrangement, and described the first cylinder is with respect to the close described valve gap of described the second cylinder, and the diameter of described the first cylinder is greater than the diameter of described the second cylinder;
The part that can contact with described piston valve core in the inner chamber of described valve body is the piston valve core chamber, and there are coaxial arrangement and the first cylindrical cavity that is connected and the second cylindrical cavity in described piston valve core chamber;
Described the first cylinder and described the first cylindrical cavity are sealed and matched, and described the second cylinder and described the second cylindrical cavity are sealed and matched.
Preferably, described the first cylinder and described the second cylinder seamlessly transit by recess;
Described the first cylindrical cavity and described the second cylindrical cavity seamlessly transit by protuberance;
When described piston valve core was seated on the described valve seat, described protuberance and described recess fastened mutually.
Preferably, all be connected with seal ring on described the first cylinder and described the second cylinder.
Preferably, described the first control valve and described the second control valve are the electrical control valve.
Preferably, described the second end face is curved surface.
Preferably, described valve gap is connected with valve seal by wound gasket.
Preferably, also comprise the guide rod that is connected with described piston valve core, described guide rod passes described valve gap, and and described valve bonnet seal cooperation.
Preferably, be provided with the graphite packing seal ring between described guide rod and the described valve gap, the clamping sleeve that described graphite packing seal ring is arranged on the described valve gap compresses, and described clamping sleeve is compressed by pressing plate, and described pressing plate is fixed by screws on the described valve gap.
Preferably, also comprise the dust-proof cover that is fixed on the described valve gap, described dust-proof cover covers on described clamping sleeve, described compressor arm and the described guide rod that is exposed at outside the described valve gap in the described dust-proof cover outward.
Can find out from technique scheme, the first control valve in the utility model, the second control valve is small-bore valve with respect to stop valve of the present utility model, stop valve in the utility model then is the heavy caliber stop valve, the utility model is by the keying of the small-bore valve of control, and the pressure difference of dependence medium itself, reach the purpose of the stop valve cut-off of control heavy caliber or conducting, the driving force that the control of small-bore valve needs is smaller, and the power source during small-bore valve control large diameter valve is flowing medium itself, has so just reached energy-saving and cost-reducing, reduce the purpose of manufacture cost.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment's technological scheme, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Structural representation when the stop valve that Fig. 1 provides for the utility model one specific embodiment is closed;
Structural representation when the stop valve that Fig. 2 provides for the utility model one specific embodiment is opened.
Wherein, 1 for valve body, 11 for import, 12 for outlet, 13 for left by-pass, 14 be the first control valve, 15 for right by-pass, 16 be the second control valve, 17 for protuberance, 2 for piston valve core, 21 be the first end face, 22 be the second end face, 23 for recess, 24 for seal ring, 3 for valve gap, 4 for valve seat, 5 for guide rod, 51 for the graphite packing seal ring, 52 for clamping sleeve, 53 for pressing plate, 54 for dust-proof cover, 55 for wound gasket.
Embodiment
The utility model discloses a kind of heavy caliber stop valve, this stop valve is in the situation that pressure medium is larger, by controlling small-bore valve, utilize the pressure difference of medium itself, reach the cut-off of control large diameter valve or the purpose of conducting, the driving moment that the control of small-bore valve needs is smaller, and the power source during small-bore valve control large diameter valve is flowing medium itself, so just reached save energy and reduce the cost, the purpose of reduction manufacture cost.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiments.Based on embodiment of the present utility model, all other embodiments of those of ordinary skills' gained under the prerequisite of not making creative work belong to the scope that the utility model is protected.
Please refer to Fig. 1-Fig. 2, the structural representation the when stop valve that Fig. 1 provides for the utility model one specific embodiment is closed; Structural representation when the stop valve that Fig. 2 provides for the utility model one specific embodiment is opened.
In the utility model one specific embodiment, stop valve comprises: valve body 1, valve gap 3, piston valve core 2, valve seat 4, left by-pass 13, right by-pass 15, the first control valve 14, the second control valve 16.
Wherein, offer import 11 and outlet 12 on the valve body 1, the bore seal of piston valve core 2 and valve body 1 cooperates; Piston valve core 2 can move reciprocatingly, because piston valve core 2 and valve body 1 bore seal cooperate, so piston valve core 2 has been divided into two mutual disconnected cavitys with the inner chamber of valve body 1, and the first chamber and the second chamber, the first chamber is with respect to the close valve gap 3 in the second chamber; Valve seat 4 is positioned at valve body 1, and be connected with valve body 1, valve seat 4 is near being provided with the intercommunicating pore suitable with piston valve core 2 on the end faces of valve gap 3, and valve seat 4 and import 1 are connected, when piston valve core 2 is seated on the intercommunicating pore, be that stop valve is when closing, valve seat 4 has been divided into not connected two-part with the second chamber, valve seat 4 is similar on the drum that is seated in valve body 1 cavity, the opening of drum is above-mentioned intercommunicating pore, and this flexible side opening that also offers, this side opening are used for being communicated with valve seat 4 and import 1, after piston valve core 2 broke away from intercommunicating pore, import 11 was communicated with by above-mentioned intercommunicating pore and outlet 12.
End face near valve gap 3 on the piston valve core 2 is the first end face 21, end face away from valve gap 3 is the second end face 22, has stop bit projection 211 on the first end face 21, when piston valve core 2 moves to valve gap 3 directions, run into valve gap 3 rear stop motions until stop bit projection 211, after the stop motion, formed the first chamber of this moment between the first end face 21 of piston valve core 2 and the internal surface of valve gap 3.In addition, when stop bit projection 211 and valve gap 3 offset, namely when stop valve is in open mode, bear the useful area of fluid pressure on the first end face 21 greater than the useful area that bears pressure on the second end face 22.
Also comprise among this embodiment: left by-pass 13, right by-pass 15, the first control valve 14 and the second control valve 16.
Wherein, left by-pass 13 is used for being communicated with import 11 and the first chamber, and the first control valve 14 is used for controlling 13 conductings of left by-pass or cut-off; Right by-pass 15 is used for being communicated with outlet the 12 and first chamber, and the second control valve 16 is used for controlling 15 conductings of right by-pass or cut-off.
When needs are closed stop valve, at first open the first control valve 14, make import 11 and the first chamber, the second chamber is communicated with, like this, the pressure that the first end face 21 of piston valve core 2 and the second end face 22 bear equates, but, the area that bears fluid pressure on the first end face 21 bears the area of fluid pressure greater than the second end face 22, so the piston valve core 2 that makes that is subject on the first end face 21 makes piston valve core 2 to the power of the first cavity direction motion to the power of the second cavity direction motion greater than what be subject on the second end face 22, so piston valve core 2 is realized closing of stop valve to the motion of the second cavity direction.
When needs are opened stop valve, at first open the second control valve 16, the first chamber and outlet 12 are connected, to realize the pressure release in the first chamber, after the first chamber pressure release is finished, close the second control valve 16, then pass into medium fluid to import 11, after medium fluid enters valve seat 4, act on the second end face 22 of piston valve core 2, piston valve core 2 moves to the first cavity direction under the effect of medium fluid pressure, thereby realize opening of stop valve, medium fluid enters from import 11, and the intercommunicating pore of flowing through flows out from exporting 12 at last.
In this embodiment, be small-bore valve the first control valve 14, the stop valve of the second control valve 16 in the utility model, and the stop valve in the utility model is large diameter valve with respect to small-bore valve, the utility model reaches the purpose of controlling large diameter valve cut-off or conducting by cut-off or the conducting of controlling small-bore valve, the driving force that the control of small-bore valve needs is smaller, and the power source during small-bore control valve control large diameter valve is flowing medium itself, has so just reached the purpose of saving energy and reduce the cost, reducing production costs.
In the utility model one specific embodiment, piston valve core 2 is formed by connecting by the first cylinder and the second cylinder, the first cylinder is with respect to the close valve gap 3 of the second cylinder, and the diameter of the first cylinder is greater than the diameter of the second cylinder, the first end face 21 that the purpose that arranges like this is to increase piston valve core 2 bears the area of flowing medium pressure, for the bore seal that guarantees piston valve core 2 and valve body 1 cooperates, correspondingly, the part that can contact with piston valve core 2 in the valve body 1 is formed by connecting by the first cylindrical cavity and the second cylindrical cavity, in the to-and-fro motion of piston valve core 2, the first cylinder on the piston valve core 2 is sealed and matched with the first cylindrical cavity all the time, and the second cylinder is sealed and matched with the second cylindrical cavity all the time.
Certainly, the useful area that above-mentioned the first end face 21 of just realizing piston valve core 2 bears fluid pressure bears the fluid pressure useful area greater than the second end face 22 a kind of form, can also be the form of other structure, this paper does not do concrete restriction to realizing the form of above-mentioned purpose.
Preferably, the first cylinder and the second cylinder are realized seamlessly transitting by recess 23, and the first cylindrical cavity and the second cylindrical cavity are realized seamlessly transitting by protuberance 17, and when piston valve core 2 was seated on the valve seat 4, protuberance 17 and recess 23 fastened mutually.The further like this sealing that has realized between piston valve core 2 and the cavity.
In the utility model one specific embodiment, the first control valve 14 and the second control valve 16 in above-mentioned are the electrical control valve.The electrical control valve is safer, and accuracy is higher.
In the utility model one specific embodiment, the second end face 22 of above-mentioned middle piston valve core 2 is curved surface, and like this, when piston valve core 2 was seated on the intercommunicating pore on the valve seat 4, sealing can be better, and the effect of cutting off flowing medium can be better.
In the utility model one specific embodiment, valve gap 3 realizes by wound gasket 55 and valve body 1 is tightly connected better.
In the utility model one specific embodiment, also comprise guide rod 5, guide rod 5 is connected with piston valve core 2, and guide rod 5 passes valve gap 3, and guide rod 5 can be reciprocating with piston valve core 2.In order to realize better the sealing between guide rod 5 and the valve body 1, between guide rod 5 and valve gap 3, be provided with graphite packing seal ring 51, graphite packing seal ring 51 can guarantee that piston valve core 2 works reliably under unlubricated dose, the state of high temperature and high speed.The clamping sleeve 52 that graphite packing seal ring 51 is arranged on the valve gap 3 compresses, and clamping sleeve 52 is compressed by pressing plate 53 again.And pressing plate 53 is fixed on the valve gap 3 by screw (not shown in FIG.).In addition, enter in the valve body 1 in order to prevent dust, also be provided with dust-proof cover 54, dust-proof cover 54 is fixed on the valve gap 3, and clamping sleeve 52, pressing plate 53 and the guide rod 5 that is exposed at outward outside the valve gap 3 are covered on 54 li of dust-proof cover.
To the above-mentioned explanation of the disclosed embodiments, be that the art professional workforce can realize or use the utility model.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and General Principle as defined herein can not breaking away from the situation of using novel spirit or scope, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. stop valve, comprise valve body (1), piston valve core (2), valve gap (3) and valve seat (4), described piston valve core (2) is divided into mutually disconnected the first chamber and the second chamber with the inner chamber of described valve body (1), described the first chamber is with respect to the close described valve gap (3) in described the second chamber, the export and import that cooperatively interacts conducting or cut-out valve body (1) of described piston valve core (2) and described valve seat (4)
It is characterized in that, the upper end face near described valve gap (3) of described piston valve core (2) is the first end face (21), end face away from described valve gap (3) is the second end face (22), has stop bit projection (211) on described the first end face (21), at described stop bit projection (211) and described valve gap (3) when offseting, on the moving direction of described piston valve core (2), bear the useful area of fluid pressure on described the first end face (21) greater than the useful area that bears fluid pressure on described the second end face (22);
Also comprise:
The left by-pass (13) that can be communicated with described import (11) and described the first chamber;
Be used for controlling first control valve (14) of (13) conducting of described left by-pass or cut-off;
The right by-pass (15) that can be communicated with described outlet (12) and described the first chamber;
Be used for controlling second control valve (16) of (15) conducting of described right by-pass or cut-off.
2. stop valve according to claim 1 is characterized in that,
Described piston valve core (2) is formed by connecting by the first cylinder and second cylinder of coaxial arrangement, and described the first cylinder is with respect to the close described valve gap (3) of described the second cylinder, and the diameter of described the first cylinder is greater than the diameter of described the second cylinder;
The part that can contact with described piston valve core (2) in the inner chamber of described valve body (1) is the piston valve core chamber, and there are coaxial arrangement and the first cylindrical cavity that is connected and the second cylindrical cavity in described piston valve core chamber;
Described the first cylinder and described the first cylindrical cavity are sealed and matched, and described the second cylinder and described the second cylindrical cavity are sealed and matched.
3. stop valve according to claim 2 is characterized in that,
Described the first cylinder and described the second cylinder seamlessly transit by recess (23);
Described the first cylindrical cavity and described the second cylindrical cavity seamlessly transit by protuberance (17);
When described piston valve core (2) was seated on the described valve seat (4), described protuberance (17) and described recess (23) fastened mutually.
4. stop valve according to claim 2 is characterized in that, all is connected with seal ring (24) on described the first cylinder and described the second cylinder.
5. stop valve according to claim 1 is characterized in that, described the first control valve (14) and described the second control valve (16) are the electrical control valve.
6. stop valve according to claim 1 is characterized in that, described the second end face (22) is curved surface.
7. stop valve according to claim 1 is characterized in that, described valve gap (3) is tightly connected by wound gasket (55) and valve body (1).
8. stop valve according to claim 1 is characterized in that, also comprises the guide rod (5) that is connected with described piston valve core (2), and described guide rod (5) passes described valve gap (3), and is sealed and matched with described valve gap (3).
9. stop valve according to claim 8, it is characterized in that, be provided with graphite packing seal ring (51) between described guide rod (5) and the described valve gap (3), the clamping sleeve (52) that described graphite packing seal ring (51) is arranged on the described valve gap (3) compresses, described clamping sleeve (52) is compressed by pressing plate (53), and described pressing plate (53) is fixed by screws on the described valve gap (3).
10. stop valve according to claim 9, it is characterized in that, also comprise the dust-proof cover (54) that is fixed on the described valve gap (3), described dust-proof cover (54) is with described clamping sleeve (52), described pressing plate (53) and be exposed at described guide rod (5) outside the described valve gap (3) outward to cover on described dust-proof cover (54) inner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320286173 CN203248742U (en) | 2013-05-23 | 2013-05-23 | Stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320286173 CN203248742U (en) | 2013-05-23 | 2013-05-23 | Stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203248742U true CN203248742U (en) | 2013-10-23 |
Family
ID=49375181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320286173 Expired - Lifetime CN203248742U (en) | 2013-05-23 | 2013-05-23 | Stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203248742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179990A (en) * | 2013-05-23 | 2014-12-03 | 湖南鸿远高压阀门有限公司 | Cutoff valve |
-
2013
- 2013-05-23 CN CN 201320286173 patent/CN203248742U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179990A (en) * | 2013-05-23 | 2014-12-03 | 湖南鸿远高压阀门有限公司 | Cutoff valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131023 |
|
| CX01 | Expiry of patent term |