CN203906819U - Periodic blow-down regulating valve for high-pressure-difference boiler - Google Patents
Periodic blow-down regulating valve for high-pressure-difference boiler Download PDFInfo
- Publication number
- CN203906819U CN203906819U CN201420314656.6U CN201420314656U CN203906819U CN 203906819 U CN203906819 U CN 203906819U CN 201420314656 U CN201420314656 U CN 201420314656U CN 203906819 U CN203906819 U CN 203906819U
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- valve
- throttle
- valve rod
- high pressure
- pressure difference
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Abstract
The utility model relates to a periodic blow-down regulating valve for a high-pressure-difference boiler. The periodic blow-down regulating valve for the high-pressure-difference boiler solves the problems that boiler water can vaporize easily in the pressure drop process of an existing regulating valve of the high-pressure-difference boiler, the valve can fail easily because of cavitation caused by the evaporation and scouring of high-speed two-phase flow, and consequentially high potential safety hazards exist. The periodic blow-down regulating valve comprises a valve body, a valve cavity is formed in the valve body, a medium inflow port is formed in the valve body, the medium inflow port is communicated with the valve cavity, a throttle assembly is arranged between the medium inflow port and the valve cavity, a plurality of throttle chambers are arranged on the throttle assembly, every two adjacent throttle chambers are communicated with each other, and the volume of the throttle chamber close to the medium inflow port is smaller than the volume of the throttle chamber close to the valve cavity. Because the periodic blow-down regulating valve is provided with the throttle assembly, the multi-step throttle mode is adopted and fluid channels are expanded step by step so as to be suitable for the characteristic that the volume is expanded while saturation liquid turns into vapor along with pressure drop, scouring abrasion to a valve clack caused by fluid is reduced, the pressure of the fluid drops step by step, and damage to products caused by evaporation of saturation liquid in pressure drop is prevented.
Description
Technical field
The utility model relates to a kind of valve, is specifically related to a kind of High Pressure Difference boiler periodical blowdown modulating valve.
Background technique
valve is the controlling component in pipeline fluid transporting system, and it is for changing path section and media flow direction, has the functions such as water conservancy diversion, cut-off, throttling, non-return, shunting or overflow release.The assembly that valve is carried as a fluid, along with national economy, the particularly development of national Chemical Industry and equipment manufacture, will obtain fast-developing good opportunity.
High Pressure Difference boiler periodical blowdown modulating valve is as the one as valve, use is frequent, switch is rapidly its advantage, but the differential pressure that High Pressure Difference boiler periodical blowdown modulating valve bears is very large, and boiler water is in saturation state, easily vaporization in decompression process, the cavitation erosion and the washing away of high speed two phase flow that produce are easy to make valve invalidation thereupon, and sewage also can aggravate the loss of valve simultaneously.The quality of High Pressure Difference boiler periodical blowdown modulating valve quality directly affects boiler operatiopn safety, is more and more paid attention to by more user and manufacturer now.
Summary of the invention
For the modulating valve boiler water in pressure drop process that solves existing High Pressure Difference boiler in background technique is easily vaporized, the cavitation erosion and the washing away of high speed two phase flow that produce are easy to make valve invalidation thereupon, have the problem of very big potential safety hazard, the utility model provides a kind of High Pressure Difference boiler periodical blowdown modulating valve.
The technical solution of the utility model is: a kind of High Pressure Difference boiler periodical blowdown modulating valve, comprise actuating device, valve body, valve seat and the flap sealing mutually with valve seat, in described valve body, be provided with the valve pocket for accommodating flap, described actuating device is connected with flap by valve rod, described valve body is provided with MEDIA FLOW entrance and MEDIA FLOW outlet, described MEDIA FLOW entrance is connected with valve pocket, between described MEDIA FLOW entrance and valve pocket, be provided with orifice union, described orifice union is provided with multiple throttle chambers, adjacent throttle chamber is connected and is less than the volume near throttle chamber of valve pocket place near the volume of MEDIA FLOW ingress throttle chamber.
As a kind of improvement of the present utility model, described orifice union comprises throttling core and is sheathed on the orifice sleeve outside throttling core, on the inwall of described orifice sleeve, inwardly stretch out dividing plate and form described throttle chamber, the outer wall of described dividing plate and throttling core forms opening, and described throttling core is outwardly throttling block at place of each throttle chamber.
As further improvement of the utility model, the bottom of described throttling core outwards folds assembly department, and described assembly department is provided with the intercommunicating pore that is communicated with throttle chamber and valve pocket.
As further improvement of the utility model, between described valve seat and throttling core, be provided with connecting tube.
As further improvement of the utility model, described valve rod comprises the upper valve rod that is connected with actuating device and the lower valve rod for being connected with flap, described upper valve rod be arranged with outward gland and with gland Spielpassung, described upper valve rod is provided with shoulder block, described shoulder block coordinates with gland axial limiting, described lower valve rod is fixedly connected with connecting sleeve outward, and described connecting sleeve is connected with gland.
As further improvement of the utility model, one end of described upper valve rod is provided with spherical surface hill portion, and described spherical surface hill portion and lower valve rod offset.
As further improvement of the utility model, described lower valve rod is provided with locking nut, and described locking nut and the lower end surface of connecting sleeve fit.
As further improvement of the utility model, one end of described gland outwards folds edge, and described connecting sleeve is sheathed on the outer and end face of connecting sleeve of gland and the bottom at edge fits.
As further improvement of the utility model, described MEDIA FLOW entrance parallels with the bottom of MEDIA FLOW outlet and is parallel with horizontal plane.
The beneficial effects of the utility model are, are provided with orifice union, make fluid step pressure reducing, control media flow velocity, and while preventing pressure drop, saturated liquids vaporization destroys product.And the utility model employing multistage throttle mode, fluid passage expands step by step, becomes the characteristic that vapor volume expands to be applicable to saturated liquids with pressure decreased, reduces fluid flap is washed away to abrasion, affects the sealability of product.
Brief description of the drawings
Accompanying drawing 1 is the utility model embodiment's structural representation.
Accompanying drawing 2 is the structure enlarged view of orifice union 6 in accompanying drawing 1.
Accompanying drawing 3 is the structure enlarged view of valve rod 5 in accompanying drawing 2.
In figure, 1, actuating device; 2, valve body; 21, valve pocket; 22, MEDIA FLOW entrance; 23, MEDIA FLOW outlet; 3, valve seat; 4, flap; 5, valve rod; 51, upper valve rod; 511, shoulder block; 512, spherical surface hill portion; 52, lower valve rod; 53, gland; 531, edge; 54, connecting sleeve; 55, locking nut; 6, orifice union; 61, throttle chamber; 62, throttling core; 621, throttling block; 622, assembly department; 623, intercommunicating pore; 63, orifice sleeve; 631, dividing plate; 64, opening; 7, connecting tube.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
By Fig. 1, 2, shown in 3, a kind of High Pressure Difference boiler periodical blowdown modulating valve, comprise actuating device 1, valve body 2, valve seat 3 and the flap 4 sealing mutually with valve seat 3, in described valve body 2, be provided with the valve pocket 21 for accommodating flap 4, described actuating device 1 is connected with flap 4 by valve rod 5, described valve body 2 is provided with MEDIA FLOW entrance 22 and MEDIA FLOW outlet 23, described MEDIA FLOW entrance 22 is connected with valve pocket 21, between described MEDIA FLOW entrance 22 and valve pocket 21, be provided with orifice union 6, described orifice union 6 is provided with multiple throttle chambers 61, adjacent throttle chamber 61 is connected and is less than the volume near valve pocket 21 throttle chambers of place 61 near the volume of MEDIA FLOW entrance 22 throttle chambers of place 61.In particular, described orifice union 6 comprises throttling core 62 and is sheathed on the orifice sleeve 63 outside throttling core 62, on the inwall of described orifice sleeve 63, inwardly stretch out dividing plate 631 and form described throttle chamber 61, described dividing plate 631 forms opening 64 with the outer wall of throttling core 62, and described throttling core 62 is at each throttle chamber 61 outwardly throttling blocks 621 in place.The channel cross-section in throttle chamber is divided into " U " font by throttling block, make medium enter throttle chamber after flow direction constantly change, increased flow resistance.The beneficial effects of the utility model are, are provided with orifice union, between throttling core and orifice sleeve, form labyrinth, make fluid step pressure reducing, control media flow velocity, and while preventing pressure drop, saturated liquids vaporization destroys product.And the utility model employing multistage throttle mode, fluid passage expands step by step, becomes the characteristic that vapor volume expands to be applicable to saturated liquids with pressure decreased, reduces fluid flap is washed away to abrasion, affects the sealability of product.In particular, opening is less, medium from MEDIA FLOW entrance flow into approach most MEDIA FLOW ingress throttle chamber time, little circulation can prevent that external foreign material from entering and damage sealing surface in valve; Throttling block is set in each throttle chamber, the direction of fluid is constantly changed, in obtaining pressure drop, greatly reduce flow velocity, the seal leakage of avoiding high flow rate to cause washing away of sealing surface of seat; Throttle chamber expands step by step, and along with the increase gradually of throttle chamber's volume and channel cross-section, hydrodynamic pressure can reliably decline and so applicable saturated liquids of structure becomes with pressure decreased the characteristic that vapor volume expands, and reduces fluid spool is washed away to abrasion.
The bottom of described throttling core 62 outwards folds assembly department 622, and described assembly department 622 is provided with the intercommunicating pore 623 that is communicated with throttle chamber 61 and valve pocket 21.Specifically, the other end of throttling core assembly department is located in one end of orifice sleeve to infolding and this one end, and such structure can facilitate the installation of throttling core and orifice sleeve.
Between described valve seat 3 and throttling core 62, be provided with connecting tube 7.It is reliable that such structure can make throttling core install, and throttleng surface, flap that throttling core and orifice sleeve form are separated mutually with the sealing surface that valve seat forms, and effectively protects sealing surface, can reserve reliably again the space of flap simultaneously.
Described valve rod 5 comprises the upper valve rod 51 that is connected with actuating device 1 and the lower valve rod 52 for being connected with flap 4, described upper valve rod 51 is outer be arranged with gland 53 and with gland 53 Spielpassung, described upper valve rod 51 is provided with shoulder block 511, described shoulder block 511 coordinates with gland 53 axial limitings, described lower valve rod 52 is outer is fixedly connected with connecting sleeve 54, and described connecting sleeve 54 is connected with gland 53.Specifically, one end of described upper valve rod 51 is provided with spherical surface hill portion 512, and described spherical surface hill portion 512 offsets with lower valve rod 52.Upper and lower valve rod is connected with connecting sleeve by gland, Spielpassung between upper valve rod and gland, when making upper and lower valve rod in decentraction or tilting by a small margin, upper valve rod has the adjusting of certain space in gland, and shoulder block can promote lower valve rod reliably, thus creeping of occurring avoid valve rod working procedure in ensureing product action message in, bite, stuck.And the utility model also exist simple in structure, easy to assembly, the advantages such as reliable in action.Certainly, in actual production process, not stuck in order to ensure upper and lower valve rod, also can be to protruding spherical concave surface with the gland of its Spielpassung on the sidewall of upper valve rod.Certainly, Placement of the present utility model is not only applicable to High Pressure Difference boiler periodical blowdown modulating valve, is suitable for other valve yet.Certainly the utility model is not only applicable to valve field, is applicable to ensure coaxality yet and avoids the connection of other upper and lower bars that tilt.
Described lower valve rod 52 is provided with locking nut 55, and described locking nut 55 fits with the lower end surface of connecting sleeve 54.Such structure can be avoided channeling bit of connecting sleeve.
One end of described gland 53 outwards folds edge 531, and described connecting sleeve 54 is sheathed on the outer and end face of connecting sleeve 54 of gland 53 and the bottom at edge 531 fits.Such structure increases the sealability of product, also can play stuffing box gland and channel bit simultaneously.
Described MEDIA FLOW entrance 22 parallels with the bottom of MEDIA FLOW outlet 23 and is parallel with horizontal plane.Such structure makes valve body bottom straight, and self-cleaning property is good, and in boiler water, undissolved precipitated impurities is difficult for piling up.
Certainly the structure in the utility model is not only applicable to steam generator system, is applicable to other yet and need to uses on the modulating valve that prevents medium vaporization in pressure drop process.
Every technician's notice: although the utility model describes according to above-mentioned embodiment; but invention thought of the present utility model is not limited in this model utility; the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.
Claims (9)
1. a High Pressure Difference boiler periodical blowdown modulating valve, comprise actuating device (1), valve body (2), valve seat (3) and the flap (4) sealing mutually with valve seat (3), in described valve body (2), be provided with the valve pocket (21) for accommodating flap (4), described actuating device (1) is connected with flap (4) by valve rod (5), described valve body (2) is provided with MEDIA FLOW entrance (22) and MEDIA FLOW outlet (23), described MEDIA FLOW entrance (22) is connected with valve pocket (21), it is characterized in that: between described MEDIA FLOW entrance (22) and valve pocket (21), be provided with orifice union (6), described orifice union (6) is provided with multiple throttle chambers (61), the volume that adjacent throttle chamber (61) is connected and close MEDIA FLOW entrance (22) is located throttle chamber (61) is less than the volume of locating throttle chamber (61) near valve pocket (21).
2. High Pressure Difference boiler periodical blowdown modulating valve according to claim 1, it is characterized in that described orifice union (6) comprises throttling core (62) and is sheathed on the outer orifice sleeve (63) of throttling core (62), on the inwall of described orifice sleeve (63), inwardly stretch out dividing plate (631) and form described throttle chamber (61), described dividing plate (631) forms opening (64) with the outer wall of throttling core (62), and described throttling core (62) is located outwardly throttling block (621) in each throttle chamber (61).
3. High Pressure Difference boiler periodical blowdown modulating valve according to claim 2, the bottom that it is characterized in that described throttling core (62) outwards folds assembly department (622), and described assembly department (622) is provided with the intercommunicating pore (623) that is communicated with throttle chamber (61) and valve pocket (21).
4. High Pressure Difference boiler periodical blowdown modulating valve according to claim 2, is characterized in that being provided with connecting tube (7) between described valve seat (3) and throttling core (62).
5. High Pressure Difference boiler periodical blowdown modulating valve according to claim 1, it is characterized in that described valve rod (5) comprises the upper valve rod (51) that is connected with actuating device (1) and the lower valve rod (52) for being connected with flap (4), described upper valve rod (51) is outer be arranged with gland (53) and with gland (53) Spielpassung, described upper valve rod (51) is provided with shoulder block (511), described shoulder block (511) coordinates with gland (53) axial limiting, the outer connecting sleeve (54) that is fixedly connected with of described lower valve rod (52), described connecting sleeve (54) is connected with gland (53).
6. High Pressure Difference boiler periodical blowdown modulating valve according to claim 5, is characterized in that one end of described upper valve rod (51) is provided with spherical surface hill portion (512), and described spherical surface hill portion (512) offsets with lower valve rod (52).
7. High Pressure Difference boiler periodical blowdown modulating valve according to claim 5, is characterized in that described lower valve rod (52) is provided with locking nut (55), and described locking nut (55) fits with the lower end surface of connecting sleeve (54).
8. High Pressure Difference boiler periodical blowdown modulating valve according to claim 5, the one end that it is characterized in that described gland (53) outwards folds edge (531), and described connecting sleeve (54) is sheathed on the outer and end face of connecting sleeve (54) of gland (53) and the bottom of edge (531) fits.
9. High Pressure Difference boiler periodical blowdown modulating valve according to claim 1, the bottom that it is characterized in that described MEDIA FLOW entrance (22) and MEDIA FLOW outlet (23) parallels and is parallel with horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314656.6U CN203906819U (en) | 2014-06-13 | 2014-06-13 | Periodic blow-down regulating valve for high-pressure-difference boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314656.6U CN203906819U (en) | 2014-06-13 | 2014-06-13 | Periodic blow-down regulating valve for high-pressure-difference boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906819U true CN203906819U (en) | 2014-10-29 |
Family
ID=51781100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420314656.6U Withdrawn - After Issue CN203906819U (en) | 2014-06-13 | 2014-06-13 | Periodic blow-down regulating valve for high-pressure-difference boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906819U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006170A (en) * | 2014-06-13 | 2014-08-27 | 江南阀门有限公司 | Periodic blow-down regulating valve of high-pressure-difference boiler |
| CN110726000A (en) * | 2019-09-25 | 2020-01-24 | 江苏辰龙阀门制造有限公司 | High-temperature steam valve |
-
2014
- 2014-06-13 CN CN201420314656.6U patent/CN203906819U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006170A (en) * | 2014-06-13 | 2014-08-27 | 江南阀门有限公司 | Periodic blow-down regulating valve of high-pressure-difference boiler |
| CN104006170B (en) * | 2014-06-13 | 2016-03-02 | 江南阀门有限公司 | High Pressure Difference boiler periodical blowdown modulating valve |
| CN110726000A (en) * | 2019-09-25 | 2020-01-24 | 江苏辰龙阀门制造有限公司 | High-temperature steam valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |