CN203297694U - Pressure reducing valve - Google Patents
Pressure reducing valve Download PDFInfo
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- CN203297694U CN203297694U CN201320344095XU CN201320344095U CN203297694U CN 203297694 U CN203297694 U CN 203297694U CN 201320344095X U CN201320344095X U CN 201320344095XU CN 201320344095 U CN201320344095 U CN 201320344095U CN 203297694 U CN203297694 U CN 203297694U
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- pressure control
- screw rod
- valve body
- control screw
- hole
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Abstract
The utility model discloses a pressure reducing valve which comprises a valve body, an end cover and a pressure control screw rod. The end cover is connected with the valve body through threads, the pressure control screw rod penetrates through a through hole of the end cover, one end, connected with the valve body, of the end cover is provided with a first sealing ring, and a second sealing ring is arranged between the through hole and the pressure control screw rod. Therefore, when the end cover is connected with the valve body through the threads, the first sealing ring is squeezed, the threaded gap between the end cover and the valve body can be sealed, and the second sealing ring arranged between the through hole of the end cover and the pressure control screw rod can seal the gap between the pressure control screw rod and the through hole. According to the technical scheme, a sealing protection device is additionally arranged based on an existing pressure reducing valve, through the combined sealing effect of the first sealing ring and the second sealing ring, sealing performance of the pressure reducing valve can be guaranteed when a cloth clamping film is broken, and leakage is prevented.
Description
Technical field
The utility model relates to technical field of valve manufacturing, relates in particular to a kind of reduction valve.
Background technique
Reduction valve is by the adjusting joint flow area, inlet pressure is reduced to the outlet pressure of a certain needs, and relies on the energy of flowing medium itself, makes outlet pressure automatically keep stable valve.From hydromechanical viewpoint, reduction valve is a throttle element that local resistance can change, and namely by changing orifice size, the kinetic energy of flow velocity and fluid is changed, and causes the different pressure losses, thereby reaches the purpose of decompression.Then rely on the adjusting of controlling with regulating system, the fluctuation of downstream pressure and spring force are balanced each other, make downstream pressure keep constant in certain margin of error.
As shown in Figure 1, Fig. 1 is the cross-sectional view of reduction valve of the prior art.Existing reduction valve is by following dual mode acting in conjunction, guarantees the sealing of reduction valve and can not leak, and its sealing principle is:
(1) end cap 12 is threaded connection with valve body 18, crushing clamp cloth diaphragm 17, thereby sealing;
(2) nut 15 is tightened with spool 19, pressure control shell fragment 16 and spool 19 crushing clamp cloth diaphragms 17, thereby sealing.
The voltage-regulation principle of reduction valve is: rotate pressure control screw rod 11, by the screw thread transmission, pressure control spiral shell dish 13 is moved up and down to diverse location, convergent-divergent spring 14, different spring forces make spool 19 be in diverse location, thereby can control the size of water outlet, obtain different pressure versus flows.
The principle of stabilized voltage of reduction valve is: under working state, the hydraulic pressure (shown in arrow) that acts on folder cloth diaphragm 17 equates with the pressure of spring 14, mutual balance; When water pressure fluctuations, the pressure of spring 14 can make spool 19 move up and down, and water outlet is followed spool 19 and changed and change, thereby plays the effect of voltage stabilizing.
During due to pressure regulation and water pressure fluctuations, folder cloth diaphragm 17 is all followed spool 19 and is moved at any time, and the working life of folder cloth diaphragm 17 is shortened in athletic meeting frequently, and is especially true in the hydraulic pressure unstable region.When reaching capacity, will break in the life-span of folder cloth diaphragm 17, water in valve body 18 can flow out in the thread pitch of end cap 12 and valve body 18 and the gap between end cap 12 and pressure control screw rod 11, cause user's family ponding, and the layman can't place under repair and change, and therefore to the user, has caused inconvenience.
Therefore, how solving the leakage problem of reduction valve, is the present technical issues that need to address of those skilled in the art.
The model utility content
In view of this, the utility model provides a kind of reduction valve,, by improving the sealability of reduction valve, has solved the leakage problem of reduction valve.
In order to address the above problem, the utility model provides a kind of reduction valve, comprise valve body, end cap and pressure control screw rod, described end cap is connected with described valve body screw thread, described pressure control screw rod is through the through hole of described end cap, the end that described end cap is connected with described valve body is provided with the first seal ring, is provided with the second seal ring between described through hole and described pressure control screw rod.
Preferably, described through hole is provided with the first circular groove, and described the second seal ring is positioned at described the first circular groove.
Preferably, the periphery that described pressure control screw rod is positioned at the part of described through hole is provided with the second circular groove, and described the second seal ring is positioned at described the second circular groove.
Preferably, the threaded end that connects described end cap on described valve body is provided with step, and the position of the corresponding described step of the threaded end of described end cap is provided with the 3rd circular groove, and described the first seal ring is positioned at described the 3rd circular groove and described step.
Preferably, be provided with a plurality of described the second seal rings between described through hole and described pressure control screw rod.
A kind of reduction valve that the utility model scheme provides, comprise valve body, end cap and pressure control screw rod, described end cap is connected with described valve body screw thread, described pressure control screw rod is through the through hole of described end cap, the end that described end cap is connected with described valve body is provided with the first seal ring, is provided with the second seal ring between described through hole and described pressure control screw rod.
Extruding the first seal ring when end cap is connected with valve body screw thread, thereby the thread pitch between end cover and valve body so are set; Be provided with the second seal ring between the through hole of end cap and pressure control screw rod, can seal the gap between pressure control screw rod and through hole.This programme has increased seal protecting device on the basis of existing reduction valve, the seal action of comprehensive the first seal ring and the second seal ring can make reduction valve still can guarantee sealing when folder cloth rupture of diaphragm, thereby can not leak.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only 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.
Fig. 1 is the cross-sectional view of reduction valve of the prior art;
The cross-sectional view of a kind of reduction valve that Fig. 2 provides for the utility model specific embodiment;
The end cover structure schematic diagram of a kind of reduction valve that Fig. 3 provides for the utility model specific embodiment;
The valve body structure schematic diagram of a kind of reduction valve that Fig. 4 provides for the utility model specific embodiment;
In Fig. 1:
Pressure control screw rod 11, end cap 12, pressure control spiral shell dish 13, spring 14, nut 15, pressure control shell fragment 16, folder cloth diaphragm 17, valve body 18, spool 19;
In Fig. 2 to Fig. 4:
Pressure control screw rod 21, end cap 22, pressure control spiral shell dish 23, spring 24, nut 25, pressure control shell fragment 26, folder cloth diaphragm 27, valve body 28, spool 29, the first seal ring 210, the second seal ring 211, through hole 221, the first circular groove 222, the 3rd circular groove 223, step 281.
Embodiment
Core of the present utility model is to provide a kind of reduction valve,, by improving the sealability of reduction valve, has solved the leakage problem of reduction valve.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment who obtains, and all belong to the scope of the utility model protection.
Please refer to Fig. 2 to Fig. 4, the cross-sectional view of a kind of reduction valve that Fig. 2 provides for the utility model specific embodiment; The end cover structure schematic diagram of a kind of reduction valve that Fig. 3 provides for the utility model specific embodiment; The valve body structure schematic diagram of a kind of reduction valve that Fig. 4 provides for the utility model specific embodiment.
In a kind of specific embodiment, this programme provides a kind of reduction valve, comprise valve body 28, end cap 22 and pressure control screw rod 21, end cap 22 is threaded with valve body 28, pressure control screw rod 21 is through the through hole 221 of end cap 22, the end that end cap 22 is connected with valve body 28 is provided with the first seal ring 210, is provided with the second seal ring 211 between through hole 221 and pressure control screw rod 21.
Concrete, the reduction valve that the utility model scheme provides also comprises pressure control spiral shell dish 23, spring 24, nut 25, pressure control shell fragment 26, folder cloth diaphragm 27 and spool 29.The voltage-regulation principle of this reduction valve is: rotate pressure control screw rod 21, by the screw thread transmission, pressure control spiral shell dish 23 is moved up and down to diverse location, convergent-divergent spring 24, different spring forces make spool 29 be in diverse location, thereby can control the size of water outlet, obtain different pressure versus flows.
The principle of stabilized voltage of this reduction valve is: under working state, the hydraulic pressure that acts on folder cloth diaphragm 27 equates with the pressure of spring 24, mutual balance; When water pressure fluctuations, the pressure of spring 24 can make spool 29 move up and down, and water outlet is followed spool 29 and changed and change, thereby plays the effect of voltage stabilizing.
The sealing principle of the reduction valve that this programme provides is: end cap 22 is threaded connection with valve body 28, crushing clamp cloth diaphragm 27, thereby sealing; Nut 25 is tightened with spool 29, pressure control shell fragment 26 and spool 29 crushing clamp cloth diaphragms 27, thereby sealing.On the basis of above two seal approach, this programme has increased again seal protecting device, and an end that namely at end cap 22, with valve body 28, is connected is provided with the first seal ring 210, is provided with the second seal ring 211 between the through hole 221 of end cap 22 and pressure control screw rod 21.
Extruding the first seal ring 210 when end cap 22 is threaded with valve body 28, thereby the thread pitch between end cover 22 and valve body 28 so are set; Be provided with the second seal ring 211 between the through hole 221 of end cap 22 and pressure control screw rod 21, can seal the gap between pressure control screw rod 21 and through hole 221.This programme has increased seal protecting device on the basis of existing reduction valve; the seal action of comprehensive the first seal ring 210 and the second seal ring 211; can make reduction valve still can guarantee sealing when folder cloth diaphragm 27 breaks; thereby can not leak; the user is normal water still, and needn't worry ponding within doors.
Need to prove, the mode that the second seal ring 211 is set between the through hole 221 of end cap 22 and pressure control screw rod 21 has multiple, and in a kind of preferred version, through hole 221 is provided with the first circular groove 222, the second seal rings 211 and is positioned at the first circular groove 222.During the assembling valve, first the second seal ring 211 is put into the first circular groove 222, then, pressure control screw rod 21 is penetrated through hole 221, and guarantee that the second seal ring 211 closely is set in the periphery of pressure control screw rod 21, i.e. gap between good seal pressure control screw rod 21 and through hole 221.
Another kind arranges the mode of the second seal ring 211, is that the periphery in the part that is positioned at through hole 221 of pressure control screw rod 21 is provided with the second circular groove, and the second seal ring 211 is positioned at the second circular groove.During the assembling valve, first the second seal ring 211 is sheathed in the second circular groove of pressure control screw rod 21, then, pressure control screw rod 21 is penetrated in through hole 221 together with the second seal ring 211 extruding, and guarantee the second seal ring 211 and through hole 221 inwall close contacts, namely realize sealing.
Certainly, also can be equipped with on through hole 221 and pressure control screw rod 21 for the corresponding circular groove of placing the second seal ring 211, at this moment, the larger seal ring of cross-section area can be installed, to guarantee good sealability.
Need to prove, the set-up mode of the first seal ring 210 also has multiple, in a kind of preferred version, the threaded end that connects end cap 22 on valve body 28 is provided with step 281, the position of the corresponding step 281 of the threaded end of end cap 22 is provided with the 3rd circular groove 223, the first seal rings 210 and is positioned at the 3rd circular groove 223 and step 281.End cap 22 is with after valve body 28 is connected, the flange of end cap 22 is stuck in the end face of the threaded end of valve body 28, the first seal ring 210 is positioned in the space of the 3rd circular groove 223 and step 281 formation, end cap 22 can push the first seal ring 210 while with valve body 28, tightening, and realizes the sealing of the thread pitch between end cap 22 and valve body 28.
Certainly, also can select other that mode of the first seal ring 210 is set, for example in the inner of the threaded end of valve body 28, offer circular groove, the first seal ring 210 is positioned in this circular groove, after end cap 22 and valve body 28 are tightened, the top of the threaded end of end cap 22 will together be pressed in valve body 28 with the first seal ring 210 and folder cloth diaphragm 27, thereby realizes thread pitch is sealed.
, in order better the gap between through hole 221 and pressure control screw rod 21 to be sealed, preferably, be provided with a plurality of the second seal rings 211 between through hole 221 and pressure control screw rod 21.So arrange, can realize multi-sealed protection between through hole 221 and pressure control screw rod 21, make reduction valve more be difficult for revealing.
, to the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization 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 (5)
1. reduction valve, comprise valve body (28), end cap (22) and pressure control screw rod (21), described end cap (22) is threaded with described valve body (28), described pressure control screw rod (21) is through the through hole (221) of described end cap (22), it is characterized in that, the end that described end cap (22) is connected with described valve body (28) is provided with the first seal ring (210), is provided with the second seal ring (211) between described through hole (221) and described pressure control screw rod (21).
2. reduction valve according to claim 1, is characterized in that, described through hole (221) is provided with the first circular groove (222), and described the second seal ring (211) is positioned at described the first circular groove (222).
3. reduction valve according to claim 1, is characterized in that, the periphery that described pressure control screw rod (21) is positioned at the part of described through hole (221) is provided with the second circular groove, and described the second seal ring (211) is positioned at described the second circular groove.
4. reduction valve according to claim 1, it is characterized in that, the upper threaded end that connects described end cap (22) of described valve body (28) is provided with step (281), the position of the corresponding described step of the threaded end of described end cap (22) (281) is provided with the 3rd circular groove (223), and described the first seal ring (210) is positioned at described the 3rd circular groove (223) and described step (281).
5. the described reduction valve of according to claim 1 to 4 any one, is characterized in that, is provided with a plurality of described the second seal rings (211) between described through hole (221) and described pressure control screw rod (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320344095XU CN203297694U (en) | 2013-06-13 | 2013-06-13 | Pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320344095XU CN203297694U (en) | 2013-06-13 | 2013-06-13 | Pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297694U true CN203297694U (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320344095XU Expired - Lifetime CN203297694U (en) | 2013-06-13 | 2013-06-13 | Pressure reducing valve |
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| Country | Link |
|---|---|
| CN (1) | CN203297694U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402447A (en) * | 2016-11-03 | 2017-02-15 | 海宁市水享净水设备有限公司 | Pressure reducing valve device |
-
2013
- 2013-06-13 CN CN201320344095XU patent/CN203297694U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402447A (en) * | 2016-11-03 | 2017-02-15 | 海宁市水享净水设备有限公司 | Pressure reducing valve device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |