CN202612748U - Pressure feedback double-diaphragm steam reducing valve - Google Patents
Pressure feedback double-diaphragm steam reducing valve Download PDFInfo
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- CN202612748U CN202612748U CN 201220202773 CN201220202773U CN202612748U CN 202612748 U CN202612748 U CN 202612748U CN 201220202773 CN201220202773 CN 201220202773 CN 201220202773 U CN201220202773 U CN 201220202773U CN 202612748 U CN202612748 U CN 202612748U
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Abstract
The utility model discloses a pressure feedback double-diaphragm steam reducing valve. The steam reducing valve comprises a valve body, a valve disc, a valve rod, a valve cover bracket, a piston, a spring seat, a spring, an upper cover, a diaphragm pressing plate, a rubber diaphragm and a stainless steel diaphragm and a copper pipe, wherein a through hole is formed in the center of the sealing face of the valve body; the valve disc is arranged at a position where the through hole of the sealing face is located, and a sealing pair is formed between the sealing faces of the valve disc and the valve body; the valve rod is fixedly connected with the valve disc; the valve cover bracket is sleeved outside the valve rod; the piston is arranged in a piston guide of the valve cover bracket; the spring seat is arranged in the inner cavity of the valve cover bracket; the spring is arranged between the piston and the spring seat; the upper cover is hermetically fixed on the top of the valve cover bracket; the diaphragm pressing plate is arranged on the piston; the rubber diaphragm and the stainless steel diaphragm are clamped between the diaphragm pressing plate and the piston, and the edges of the rubber diaphragm and the stainless steel diaphragm are fixed at the sealing joint of the upper cover and the valve cover bracket; and the copper pipe is communicated with the cavity of the upper cover and the outlet cavity of the valve body. The steam reducing valve solves the problems of high-temperature and condensed water accumulation, heat expansion and cold contraction of materials and the like in steam pipelines, the performance of the diaphragm is improved, and the service lives of the diaphragms are prolonged.
Description
Technical field
The utility model relates to a kind of reduction valve that is used for the boats and ships steam piping, is specifically related to the two diaphragm type steam reducing valves of a kind of pressure feedback type.
Background technique
Steam reducing valve is through adjusting, and inlet pressure is reduced to the outlet pressure of a certain needs, and relies on the energy of medium itself, makes outlet pressure keep stable valve automatically.See that from hydromechanical viewpoint reduction valve is a throttle element that local resistance can change,, the kinetic energy of flow velocity and fluid is changed, cause the different pressure losses, thereby reach the purpose of decompression promptly through changing orifice size.Rely on the adjusting of control and adjusting nut then, the fluctuation of downstream pressure and spring force are balanced each other, make downstream pressure in certain margin of error, keep constant.
The piston place can be because high temperature expands with heat and contract with cold and causes and block when using in steam pipework according to the piston steam reduction valve of NBS in the existing technology, and the diaphragm of the steam reducing valve of diaphragm type generally all is a rubber, can't bear the high temperature of steam.Simultaneously, the steam reducing valve of existing technology can cause the valve disc switch to hinder because condensed water gathers.
The model utility content
The utility model provides a kind of pressure feedback type two diaphragm type steam reducing valves, overcomes problems such as the high temperature, condensed water ponding, the material that exist in the steam pipework expand with heat and contract with cold always, improves the performance and the life-span of diaphragm.
For realizing above-mentioned purpose, the utility model provides a kind of pressure feedback type two diaphragm type steam reducing valves, is characterized in that this reduction valve comprises:
The top is provided with the valve body of opening, is provided with sealing surface in this body cavity, and the inner chamber of valve body is divided into snout cavity and outlet plenum by sealing surface; This snout cavity and outlet plenum are communicated with the entrance point and the outlet end of valve body respectively; Sealing surface central authorities are provided with the through hole with the corresponding setting of valve body open top;
Be arranged at the valve disc of sealing surface through hole, the sealing surface of this valve disc and the sealing surface of valve body are oppositely arranged, and form sealing pair;
Valve rod, the one of which end vertically stretches in the valve body open top, and is fixedly connected with valve disc;
Be set in the outer valve gap support of valve rod, the bottom of this valve gap support is fixedly connected on the top open part of valve body; The top of valve gap support is provided with piston guide;
Be arranged on the piston in the valve gap support piston guide, this piston sleeve is located on the valve rod;
Be arranged on the spring seat at valve gap rack bore middle part, the valve rod string is located in this spring seat;
Be set in the spring on the valve rod, this spring is arranged between piston and the spring seat;
Loam cake, it is sealedly connected and fixed at the top of valve gap support;
Be set in the diaphragm pressing plate on the valve rod, this diaphragm pressing plate is arranged on piston head;
Be set in elastomer diaphragm and stainless steel diaphragm on the valve rod, the middle part of this elastomer diaphragm and stainless steel diaphragm closely is folded between diaphragm pressing plate and the piston; The edge of this elastomer diaphragm and stainless steel diaphragm is fixed in the place that is tightly connected of loam cake and valve gap support;
Copper pipe, its two ends are communicated with loam cake respectively and valve gap props up the cavity of top of the trellis formation and the outlet plenum of valve body.
The through hole that above-mentioned valve gap frame bottom string is provided with valve rod is made as stuffing hole, and the bottom opening place of this stuffing hole is provided with the filler seat that is set on the valve rod, and the top open part of stuffing hole is provided with pine and is enclosed within the Gland on the valve rod; Be provided with graphite packing between this filler seat and the Gland.
The inner chamber middle part of above-mentioned valve gap support is fixed with adjusting nut seat and adjusting nut; Adjusting nut is located in the adjusting nut seat through the screw thread string; Adjusting nut is arranged at the below of spring seat, and the bottom of the end face of adjusting nut and spring seat offsets.
This reduction valve also comprises locking nut, and this locking nut is provided with internal thread and outside thread, and locking nut is fixed in the end that valve rod is connected with valve disc through internal thread, and locking nut is connected fixing with valve disc through outside thread.
Above-mentioned valve gap support is connected through the flange assembling with valve body.
The flange connections of the open top of above-mentioned valve body and valve gap support also is provided with the enhancing Graphite pad.
Between above-mentioned diaphragm pressing plate and piston, elastomer diaphragm is close to the setting of diaphragm pressing plate, and the stainless steel diaphragm is close to the piston setting.
When this reduction valve is installed, with loam cake down valve body be installed in the pipeline last;
In the valve body during circulation medium, the part medium in the valve outlet chamber transfers to loam cake and valve gap through copper pipe and props up in the cavity that top of the trellis forms, and stainless steel diaphragm and elastomer diaphragm are applied feedback pressure; Through the interlock of piston, diaphragm pressing plate, nut, stainless steel diaphragm and elastomer diaphragm, drive the valve rod action, valve rod drives the valve disc action; Change the orifice size in the valve body; The kinetic energy of flow velocity and medium fluid is changed, and build-up of pressure loses, thereby reaches the purpose of decompression;
Through adjusting nut, change the spring force of spring, the spring force of spring and feedback pressure are balanced each other, the pressure of control reduction valve outlet end makes the downstream pressure in the valve outlet chamber in certain margin of error, keep constant.
The reduction valve of two diaphragm type steam reducing valves of the utility model pressure feedback type and existing technology is compared, and its advantage is, the utility model
Can easily realize the function of steam piping decompression, can be with respect to prior steam reduction valve piston place because high temperature expand with heat and contract with cold and causes and block, the reduction valve of the utility model has solved this problem of having avoided fully on the structure with on the mounting type; Can cause the valve disc switch to hinder because condensed water gathers at traditional steam reducing valve, the reduction valve of model utility imports copper pipe and loam cake place with condensed water, has played cooling and heat insulation effect, the life-span of having improved diaphragm and piston greatly; ,
Model utility is provided with the structure of two diaphragms, with elastomer diaphragm seal and carry out pressure feedback, stainless steel diaphragm protection elastomer diaphragm prevents to be damaged the performance and the life-span of further having improved diaphragm by impact force; Improved the combination property of reduction valve greatly.
Description of drawings
Fig. 1 is the structural representation of the two diaphragm type steam reducing valves of the utility model pressure feedback type.
Embodiment
Below in conjunction with accompanying drawing, further specify the specific embodiment of the utility model.
As shown in Figure 1; The utility model discloses the two diaphragm type steam reducing valves of a kind of pressure feedback type, this reduction valve comprises: valve body 1, valve disc 2, locking nut 3, valve rod 4, valve gap support 5, Gland 6, adjusting nut 7, spring seat 8, piston 9, elastomer diaphragm 10, stainless steel diaphragm 11, diaphragm pressing plate 12, loam cake 13, filler seat 14, spring 15, copper pipe 16, nut 17, enhancing Graphite pad 18 and graphite packing 19.
Above-mentioned valve gap support 5, Gland 6, adjusting nut 7, spring seat 8, piston 9, elastomer diaphragm 10, stainless steel diaphragm 11, diaphragm pressing plate 12, filler seat 14, spring 15, strengthen Graphite pad 18 and graphite packing 19 all is provided with valve rod hole, 4 strings of valve rod are established at above-mentioned valve gap support 5, Gland 6, adjusting nut 7, spring seat 8, piston 9, elastomer diaphragm 10, stainless steel diaphragm 11, diaphragm pressing plate 12, filler seat 14, spring 15, are strengthened in the valve rod hole of Graphite pad 18 and graphite packing 19.
One end of valve rod 4 vertically stretches in valve body 1 open top; This end of valve rod 4 be provided with locking nut 3 endoporus in the suitable outside thread of internal thread; Valve rod 4 strings are established in the endoporus of locking nut 3; And the internal thread through locking nut 3 is connected with locking nut 3 and fixes, and the while is also realized being fixedly connected between valve rod 4 and the valve disc 2.
Valve rod 4 is the axle class, and the stem head of its valve rod 4 ends, below is greater than the diameter of valve rod 4, and the upper end of valve rod 4 is provided with screw thread, and this screw thread and nut 17 are suitable, can be fastening with nut 17.
Valve gap support 5 is a cast member, and it is set in outside the valve rod 4.The top of valve gap support 5 and bottom all are made as flanged surface.The bottom of valve gap support 5 is connected through the flange mount with the top open part of valve body 1, is provided with piston guide on the top of valve gap support 5.Valve gap support 5 is provided with through hole at the open-topped flange connections of bottom and valve body 1, and the axis that this through hole and piston guide all are arranged on valve gap support 5 makes progress.Valve rod 4 strings are located in the through hole of piston guide and valve gap support 5 bottoms.
The through hole at place, medial axis, above-mentioned valve gap support 5 bottom is stuffing hole, and the bottom opening place of this stuffing hole is provided with the filler seat 14 that is set on the valve rod 4, and the top open part of this stuffing hole is provided with pine and is enclosed within the Gland 6 on the valve rod 4 simultaneously.Be provided with graphite packing 19 in the stuffing hole between filler seat 14 and Gland 6.Wherein, Gland 6 is an annular, and there is screw thread the below, and the top is a hexagonal.This Gland 6 is used to compress graphite packing 19, seals.Filler seat 14 is made as ring-type, is pressed in the stuffing hole of valve gap support 5, and shifts the bottom onto, and when valve rod 4 passes valve gap support 5, filler seat 14 is enclosed within on the valve rod 4 then, and cooperates with Gland 6 and to compress graphite packing 19, and valve rod 4 places are sealed.The effect that seals between valve rod 4 and the valve gap support 5 is played in graphite packing 19.
The flange connections of the open top of valve body 1 and valve gap support 5 also is provided with and strengthens Graphite pad 18, seals.
Piston 9 is arranged in the piston guide at valve gap support 5 tops, and this piston 9 is sheathed and be fixed on the valve rod 4.Piston 9 is the step circle cylindricality, and there is valve rod hole the centre, and piston 9 can transmit feedback pressure and give valve rod 4, finally drives opening/closing of valve disc 2.
Inner chamber middle part at valve gap support 5 is fixed with the adjusting nut seat, and adjusting nut 7 is located in the adjusting nut seat through the screw thread string, and adjusting nut 7 can rotate freely adjusting in the adjusting nut seat.The top of this adjusting nut 7 is fixedly connected with the bottom of spring seat 8.
Adjusting nut 7 is an annular, and there is screw thread the below, and the top is a hexagonal.Adjusting nut 7 is used for jack-up spring seat 8, and the power of adjustment spring 15 is controlled the pressure of reduction valve outlet end.
This diaphragm pressing plate 12 is arranged on the top of piston 9; The middle part of elastomer diaphragm 10 and stainless steel diaphragm 11 then closely is folded between diaphragm pressing plate 12 and the piston 9; Wherein elastomer diaphragm 10 is close to 12 settings of diaphragm pressing plate; 11 on stainless steel diaphragm is close to piston 9 setting, the setting of fitting each other of elastomer diaphragm 10 and stainless steel diaphragm 11.The nut 17 sheathed ends that are fixed on valve rod 4 upper ends; After above-mentioned piston 9, stainless steel diaphragm 11, elastomer diaphragm 10, diaphragm pressing plate 12 install; The nut 17 of screwing, the scope that limiting diaphragm pressing plate 12 moves up makes piston 9, stainless steel diaphragm 11, elastomer diaphragm 10, diaphragm pressing plate 12 under the downward pressure effect of nut 17; Simultaneously because spring 15 applies spring force upwards to piston 9, stainless steel diaphragm 11, elastomer diaphragm 10, diaphragm pressing plate 12; Realize that diaphragm pressing plate 12, piston 9, stainless steel diaphragm 11, elastomer diaphragm 10 are fixed on the valve rod 4, and drive valve rod 4 and move together, drive valve discs 2 realization pressure-reducing functions with valve rod 4.
Simultaneously, the edge of this elastomer diaphragm 10 and stainless steel diaphragm 11 is provided with flange hole, is fixed in the joint of loam cake 13 and valve gap support 5.Seal action is played in being connected between 10 pairs of loam cakes 13 of this elastomer diaphragm and the valve gap support 5.
The feedback pressure of valve export end is transmitted in the interlock of piston 9, diaphragm pressing plate 12, nut 17, stainless steel diaphragm 11 and elastomer diaphragm 10, through driving valve rod 4 actions, the final opening and closing that drive control valve disc 2.Wherein stainless steel diaphragm 11 also has protective action to elastomer diaphragm 10.
The two ends of copper pipe 16 are communicated with loam cake 13 and the cavity of valve gap support 5 tops formation and the outlet plenum of valve body 1 respectively.With the feedback pressure that transmits valve body 1 outlet plenum.
The working principle of the two diaphragm type steam reducing valves of the utility model pressure feedback type is following:
When this reduction valve was installed, with loam cake 13 down, valve body 1 was installed in the pipeline last.
When medium circulates in valve body 1; Part medium in valve body 1 outlet plenum transfers in the cavity of loam cake 13 and the formation of valve gap support 5 tops through copper pipe 16; And stainless steel diaphragm 11 and elastomer diaphragm 10 applied feedback pressure, this feedback pressure has embodied the downstream pressure in valve body 1 outlet plenum.Interlock through piston 9, diaphragm pressing plate 12, nut 17, stainless steel diaphragm 11 and elastomer diaphragm 10; Drive valve rod 4 actions, 4 of valve rods drive valve disc 2 actions, change the switching size of valve disc 2 through hole on valve body 1 sealing surface 20; Change the orifice size in the valve body 1; The kinetic energy of flow velocity and medium fluid is changed, and build-up of pressure loses, thereby reaches the purpose of decompression.
Through adjusting nut 17; Can change the position of spring seat 8; Through changing the range of extension of spring 15,, the spring force of spring 15 and feedback pressure are balanced each other to change the spring force of spring 15; The pressure of control reduction valve outlet end makes the downstream pressure in valve body 1 outlet plenum in certain margin of error, keep constant.
Although the content of the utility model has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to the restriction to the utility model.After those skilled in the art have read foregoing, for the multiple modification of the utility model with to substitute all will be conspicuous.Therefore, the protection domain of the utility model should be limited appended claim.
Claims (7)
1. two diaphragm type steam reducing valves of a pressure feedback type is characterized in that this reduction valve comprises:
The top is provided with the valve body (1) of opening, is provided with sealing surface (20) in this valve body (1) inner chamber, and the inner chamber of valve body (1) is divided into snout cavity and outlet plenum by sealing surface (20); This snout cavity and outlet plenum are communicated with the entrance point and the outlet end of valve body (1) respectively; Sealing surface (20) central authorities are provided with the through hole with the corresponding setting of valve body (1) open top;
Be arranged at the valve disc (2) of sealing surface (20) through hole, the sealing surface (20) of sealing surface of this valve disc (2) and valve body (1) is oppositely arranged, and forms sealing pair;
Valve rod (4), one of which end vertically stretch in valve body (1) open top, and are fixedly connected with said valve disc (2);
Be set in the outer valve gap support (5) of valve rod (4), the bottom of this valve gap support (5) is fixedly connected on the top open part of valve body (1); The top of valve gap support (5) is provided with piston guide;
Be arranged on the piston (9) in valve gap support (5) piston guide, this piston (9) is set on the valve rod (4);
Be arranged on the spring seat (8) at valve gap support (5) inner chamber middle part, valve rod (4) string is located in this spring seat (8);
Be set in the spring (15) on the said valve rod (4), this spring (15) is arranged between piston (9) and the spring seat (8);
Loam cake (13), it is sealedly connected and fixed at the top of valve gap support (5);
Be set in the diaphragm pressing plate (12) on the valve rod (4), this diaphragm pressing plate (12) is arranged on piston (9) top;
Be set in elastomer diaphragm (10) and stainless steel diaphragm (11) on the valve rod (4), the middle part of this elastomer diaphragm (10) and stainless steel diaphragm (11) closely is folded between said diaphragm pressing plate (12) and the piston (9); The edge of this elastomer diaphragm (10) and stainless steel diaphragm (11) is fixed in the place that is tightly connected of loam cake and valve gap support (5);
Copper pipe (16), its two ends are communicated with said loam cake (13) and the cavity of valve gap support (5) top formation and the outlet plenum of valve body (1) respectively.
2. the two diaphragm type steam reducing valves of pressure feedback type as claimed in claim 1; It is characterized in that; The through hole that described valve gap support (5) bottom string is provided with valve rod (4) is made as stuffing hole; The bottom opening place of this stuffing hole is provided with the filler seat (14) that is set on the valve rod (4), and the top open part of this stuffing hole is provided with pine and is enclosed within the Gland (6) on the valve rod (4); Be provided with graphite packing (19) between described filler seat (14) and the Gland (6).
3. the two diaphragm type steam reducing valves of pressure feedback type as claimed in claim 1 is characterized in that, the inner chamber middle part of said valve gap support (5) is fixed with adjusting nut seat and adjusting nut (7); Adjusting nut (7) is located in the adjusting nut seat through the screw thread string; Adjusting nut (7) is arranged at the below of spring seat (8), and the bottom of the end face of adjusting nut (7) and spring seat (8) offsets.
4. the two diaphragm type steam reducing valves of pressure feedback type as claimed in claim 1; It is characterized in that; This reduction valve also comprises locking nut (3); This locking nut (3) is provided with internal thread and outside thread, and locking nut (3) is fixed in the end that said valve rod (4) is connected with valve disc (2) through internal thread, and locking nut (3) is connected fixing with valve disc (2) through outside thread.
5. the two diaphragm type steam reducing valves of pressure feedback type as claimed in claim 1 is characterized in that, described valve gap support (5) is connected through the flange assembling with valve body (1).
6. the two diaphragm type steam reducing valves of pressure feedback type as claimed in claim 5 is characterized in that, the flange connections of the open top of said valve body (1) and valve gap support (5) also is provided with and strengthens Graphite pad (18).
7. the two diaphragm type steam reducing valves of pressure feedback type as claimed in claim 1; It is characterized in that; Between said diaphragm pressing plate (12) and piston (9), described elastomer diaphragm (10) is close to diaphragm pressing plate (12) setting, and stainless steel diaphragm (11) is close to piston (9) setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220202773 CN202612748U (en) | 2012-05-08 | 2012-05-08 | Pressure feedback double-diaphragm steam reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220202773 CN202612748U (en) | 2012-05-08 | 2012-05-08 | Pressure feedback double-diaphragm steam reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202612748U true CN202612748U (en) | 2012-12-19 |
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ID=47346449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220202773 Expired - Lifetime CN202612748U (en) | 2012-05-08 | 2012-05-08 | Pressure feedback double-diaphragm steam reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202612748U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154286A (en) * | 2014-08-15 | 2014-11-19 | 攀钢集团攀枝花钢钒有限公司 | Regulating valve for inflatable sealing system |
| CN104421488A (en) * | 2013-09-11 | 2015-03-18 | 丹佛斯公司 | Differential pressure valve with flush |
| CN112113023A (en) * | 2020-09-30 | 2020-12-22 | 张济麟 | High-efficiency gas pressure reducing device |
-
2012
- 2012-05-08 CN CN 201220202773 patent/CN202612748U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421488A (en) * | 2013-09-11 | 2015-03-18 | 丹佛斯公司 | Differential pressure valve with flush |
| CN104154286A (en) * | 2014-08-15 | 2014-11-19 | 攀钢集团攀枝花钢钒有限公司 | Regulating valve for inflatable sealing system |
| CN112113023A (en) * | 2020-09-30 | 2020-12-22 | 张济麟 | High-efficiency gas pressure reducing device |
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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: 20121219 |
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| CX01 | Expiry of patent term |