CN205639701U - Melamine is three -way valve for production technology - Google Patents
Melamine is three -way valve for production technology Download PDFInfo
- Publication number
- CN205639701U CN205639701U CN201620495755.8U CN201620495755U CN205639701U CN 205639701 U CN205639701 U CN 205639701U CN 201620495755 U CN201620495755 U CN 201620495755U CN 205639701 U CN205639701 U CN 205639701U
- Authority
- CN
- China
- Prior art keywords
- neck
- long
- valve
- valve rod
- bonnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lift Valve (AREA)
Abstract
The utility model discloses a melamine is three -way valve for production technology, including the three -way valve valve body, valve gap on the long -neck, valve rod and the case that is located the three -way valve valve body, the valve gap passes through the upper end of bolted connection at the three -way valve valve body on the long -neck, the one end of the valve rod top of valve gap from the long -neck pass on the long -neck valve gap stretch into in the three -way valve valve body with case threaded connection, it can seal the clearance between the valve gap on valve rod and the long -neck to be equipped with sealing device on the long -neck between valve gap upper portion and the valve rod, on the long -neck valve gap be located set up on the outer neck wall of sealing device below position with the long -neck on the screw hole of valve cover inner cavity intercommunication, screw hole screw -thread fit has sealed end cap. The utility model discloses simple structure utilizes high -pressure gas to hold the chamber to the valve rod to carry out the blowback through seting up on the long -neck screw hole on the valve gap, has avoided melamine valve gap inner wall crystallization on the long -neck valve rod operation card that the wall built -up phenomenon leads to to appear and has died, makes the valve rod can operate the life who has improved the valve freely.
Description
Technical field
This utility model relates to a kind of three-way valve, is specifically related to a kind of preparation technology of melamine three-way valve.
Background technology
At present, some chemical enterprises are all to use urea production tripolycyanamide, this technique is to be allowed to into molten condition by being heated to uniform temperature (about 400 DEG C) under the conditions of atmospheric-pressure urea, utilize special reactor, under the effect of catalyst, carbamide is made to aggregate into the admixture of gas of tripolycyanamide, carbon dioxide and ammonia, then catalyst is removed, again with chilling out of breath cold, produce tripolycyanamide and fix powder and separate with carbon dioxide and ammonia, to obtain tripolycyanamide finished product, carbon dioxide and ammonia enter recycle section and reclaim.But the three-way valve used in preparation technology of melamine conveyance conduit, owing to there is gap between valve rod and long-neck bonnet, the admixture of gas of tripolycyanamide, carbon dioxide and ammonia will enter in the inner chamber of long-neck bonnet, bonding characteristic due to tripolycyanamide self, tripolycyanamide in this portion gas mixture is crystallized at long-neck bonnet, inwall, after certain time, accumulation is too much, easily cause blocking, make valve rod operation stuck, spool cannot be operated, reduce its service life.
Utility model content
For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is: how to provide a kind of it can be avoided that the valve rod that tripolycyanamide crystallization causes operates stuck, improves the preparation technology of melamine three-way valve in valve service life.
In order to solve above-mentioned technical problem, this utility model have employed following technical scheme:
A kind of preparation technology of melamine three-way valve, including three-way valve body, long-neck bonnet, valve rod and the spool being positioned at three-way valve body, described long-neck bonnet, is bolted in the upper end of described three-way valve body, threaded with described spool in the top of described long-neck bonnet, extend into described three-way valve body through described long-neck bonnet, in one end of described valve rod, it is provided with sealing device between described long-neck bonnet, top and described valve rod can the gap between described valve rod and described long-neck bonnet, be sealed, it is characterized in that: described long-neck bonnet, is positioned on the outer neck wall of described sealing device lower position and offers and the screwed hole of described long-neck bonnet, inner space, described screwed hole threaded engagement has seal plug.
In this utility model, during use, periodically open the seal plug on long-neck bonnet, it is connected with screwed hole with a high-pressure air pipe, in long-neck bonnet, inner chamber, is passed through gases at high pressure by screwed hole, by the admixture of gas blowback of tripolycyanamide, carbon dioxide and ammonia to three-way valve body, avoid tripolycyanamide to crystallize at long-neck bonnet, inwall, occur that the valve rod operation that wall cling phenomenon causes is stuck, make valve rod be operable to freely, also extend the service life of valve simultaneously.
As optimization, described long-neck bonnet, is positioned on the outer neck wall of described seal plug lower position and is convexly equipped with annular flange dish along described long-neck bonnet, circumference, it is positioned on the described long-neck bonnet, above described annular flange dish and is set with, described take over a business to be attached by fastening bolt with described annular flange dish, described take over a business distance between lower surface and described three-way valve body center be 800～1200mm, described take over a business and described seal plug between the outer neck wall of described long-neck bonnet, on described long-neck bonnet, axis direction uniform intervals is provided with the multilamellar fin around described long-neck bonnet, circumference.
At preparation technology of melamine, its conveyance conduit is all meeting outsourcing one layer of heat preservation chuck, additionally at valve, can increase by one equally and add heat container, is placed on by valve and add continuous heating in heat container, it is to avoid the structure of valve internal complexity makes tripolycyanamide crystallize.It is this that to add the height that heat container the most all makes higher, its heating-up temperature is gradually lowered from the bottom to top, also not having above it can the sealing lid of closed heating container, so in order to allow the operator to valve rod is operated, but the heat losses adding in heat container thus can be made to fall, the heating-up temperature to valve can be reduced, easily make tripolycyanamide that crystallization occurs.Increase long-neck bonnet, and the length of valve rod, being contemplated to reach adds outside heat container, then sealing at the heat container of taking over a business to add being bolted on valve stem sleeve, the most also completely cut off by the heat added in heat container, convenient ventilate valve rod and screwed hole high pressure operates.The part that the fin being additionally provided on top can make long-neck bonnet, stretch out is dispelled the heat, and reduces temperature, facilitates operator to operate.
As optimization, described sealing device includes the filler being provided with between described long-neck bonnet, top and described valve rod, it is positioned on the described valve rod below described filler and is arranged with filler pressure pad, described long-neck bonnet, is provided with the hole shoulder can being supported described filler pressure pad, it is positioned at and is arranged with the upper end of filler pressing sleeve and filler pressing sleeve on the described valve rod above described filler and reaches above described long-neck bonnet, it is positioned on the described valve rod above described filler pressing sleeve and is arranged with hold-down grid, can make described filler pressing sleeve that described filler is compressed by hold-down bolt between described hold-down grid and described long-neck bonnet,.Valve rod can cause filler to wear and tear under long-time high-frequency action, and then increases the gap value between valve rod.By the regulation of hold-down bolt, hold-down grid can be made to act on filler pressing sleeve and to make filler pressing sleeve that filler to be compressed, reduce the gap value between filler and valve rod, improve the filler sealing to valve rod.
In sum, the beneficial effects of the utility model are: this utility model simple in construction, utilize the gases at high pressure long-neck bonnet, inner chamber is carried out blowback, it is to avoid in the crystallization of long-neck bonnet, inwall, tripolycyanamide occurs that the valve rod operation that wall cling phenomenon causes is stuck, make valve rod be operable to freely.Sealing heating container top additionally by taking over a business, be enclosed in by heat and add in heat container, improve the heating-up temperature to valve, the most more easily ventilating valve rod and screwed hole high pressure operates, and improves the service life of valve.
Accompanying drawing explanation
In order to make the purpose of utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, this utility model is described in further detail, wherein:
Fig. 1 is sectional view of the present utility model；
Fig. 2 is enlarged diagram at A in Fig. 1.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings.
nullAs depicted in figs. 1 and 2，A kind of preparation technology of melamine three-way valve in this detailed description of the invention，Including three-way valve body 1、Long-neck bonnet, 2、Valve rod 3 and the spool 4 being positioned at three-way valve body 1，Described long-neck bonnet, 2 is bolted the upper end at described three-way valve body 1，Threaded with described spool 4 in the top of described long-neck bonnet, 2 extend into described three-way valve body 1 through described long-neck bonnet, 2 in one end of described valve rod 3，It is provided with sealing device between described long-neck bonnet, 2 top and described valve rod 3 can the gap between described valve rod 3 and described long-neck bonnet, 2 be sealed，Described long-neck bonnet, 2 is positioned on the outer neck wall of described sealing device lower position and offers and the screwed hole of described long-neck bonnet, 2 inner space，Described screwed hole threaded engagement has seal plug 5.
In this detailed description of the invention, described long-neck bonnet, 2 is positioned on the outer neck wall of described seal plug 5 lower position and is convexly equipped with annular flange dish 6 along described long-neck bonnet, 2 circumference, it is positioned on the described long-neck bonnet, 2 above described annular flange dish 6 and is set with 7, described take over a business 7 to be attached by fastening bolt with described annular flange dish 6, described take over a business distance between 7 lower surfaces and described three-way valve body 1 center be 800～1200mm, take over a business described long-neck bonnet, 2 axis direction uniform intervals to be provided with the multilamellar fin 8 around described long-neck bonnet, 2 circumference on described long-neck bonnet, 2 outer neck wall between 7 and described seal plug 5 described.
In this detailed description of the invention, described sealing device includes the filler 9 being provided with between described long-neck bonnet, 2 top and described valve rod 3, it is positioned on the described valve rod 3 below described filler 9 and is arranged with filler pressure pad 10, described long-neck bonnet, 2 is provided with the hole shoulder can being supported described filler pressure pad 10, it is positioned at and is arranged with the upper end of filler pressing sleeve 11 and filler pressing sleeve 11 on the described valve rod 3 above described filler 9 and reaches above described long-neck bonnet, 2, it is positioned on the described valve rod 3 above described filler pressing sleeve 11 and is arranged with hold-down grid 12, can make described filler pressing sleeve 11 that described filler 9 is compressed by hold-down bolt 13 between described hold-down grid 12 and described long-neck bonnet, 2.
During being embodied as, described valve rod 3 is made up of the many quarter butts being coaxially disposed, and is attached by screw thread between adjacent two described quarter butts.Because the length of valve rod 3 is longer, diameter is the least simultaneously, belongs to the scope of slender axles, and the control of cylindricity is the most difficult, uses the mode that many quarter butts connect, it is ensured that its axiality is the most permissible, reduces the difficulty of processing of valve rod 3.
Finally illustrate is, above example is only in order to illustrate the technical solution of the utility model and unrestricted, although this utility model being described by referring to preferred embodiment of the present utility model, but it will be understood by those within the art that, in the form and details it can be made various change, the spirit and scope of the present utility model limited without departing from appended claims.
Claims (3)
1. a preparation technology of melamine three-way valve, including three-way valve body, long-neck bonnet, valve rod and the spool being positioned at three-way valve body, described long-neck bonnet, is bolted in the upper end of described three-way valve body, threaded with described spool in the top of described long-neck bonnet, extend into described three-way valve body through described long-neck bonnet, in one end of described valve rod, it is provided with sealing device between described long-neck bonnet, top and described valve rod can the gap between described valve rod and described long-neck bonnet, be sealed, it is characterized in that: described long-neck bonnet, is positioned on the outer neck wall of described sealing device lower position and offers and the screwed hole of described long-neck bonnet, inner space, described screwed hole threaded engagement has seal plug.
A kind of preparation technology of melamine three-way valve the most according to claim 1, it is characterized in that: described long-neck bonnet, is positioned on the outer neck wall of described seal plug lower position and is convexly equipped with annular flange dish along described long-neck bonnet, circumference, it is positioned on the described long-neck bonnet, above described annular flange dish and is set with, described take over a business to be attached by fastening bolt with described annular flange dish, described take over a business distance between lower surface and described three-way valve body center be 800～1200mm, described take over a business and described seal plug between the outer neck wall of described long-neck bonnet, on described long-neck bonnet, axis direction uniform intervals is provided with the multilamellar fin around described long-neck bonnet, circumference.
A kind of preparation technology of melamine three-way valve the most according to claim 1, it is characterized in that: described sealing device includes the filler being provided with between described long-neck bonnet, top and described valve rod, it is positioned on the described valve rod below described filler and is arranged with filler pressure pad, described long-neck bonnet, is provided with the hole shoulder can being supported described filler pressure pad, it is positioned at and is arranged with the upper end of filler pressing sleeve and filler pressing sleeve on the described valve rod above described filler and reaches above described long-neck bonnet, it is positioned on the described valve rod above described filler pressing sleeve and is arranged with hold-down grid, can make described filler pressing sleeve that described filler is compressed by hold-down bolt between described hold-down grid and described long-neck bonnet,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620495755.8U CN205639701U (en) | 2016-05-28 | 2016-05-28 | Melamine is three -way valve for production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620495755.8U CN205639701U (en) | 2016-05-28 | 2016-05-28 | Melamine is three -way valve for production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205639701U true CN205639701U (en) | 2016-10-12 |
Family
ID=57052941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620495755.8U Expired - Fee Related CN205639701U (en) | 2016-05-28 | 2016-05-28 | Melamine is three -way valve for production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205639701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043351A (en) * | 2019-11-27 | 2020-04-21 | 西安航天动力研究所 | Ultralow-temperature low-flow-resistance self-maintaining two-position three-way stop valve |
| CN113404900A (en) * | 2021-07-12 | 2021-09-17 | 韩军蕊 | Temperature-adjusting water tap |
-
2016
- 2016-05-28 CN CN201620495755.8U patent/CN205639701U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043351A (en) * | 2019-11-27 | 2020-04-21 | 西安航天动力研究所 | Ultralow-temperature low-flow-resistance self-maintaining two-position three-way stop valve |
| CN113404900A (en) * | 2021-07-12 | 2021-09-17 | 韩军蕊 | Temperature-adjusting water tap |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205639701U (en) | Melamine is three -way valve for production technology | |
| CN103981512B (en) | A kind of controllable reaction thing equally distributed dual pathways spout structure | |
| CN102342484B (en) | Pressure cooking device | |
| CN206816998U (en) | A kind of high-temperature flange sealing structure | |
| CN202184099U (en) | Pressurized steaming device | |
| CN205102588U (en) | Take cooling device's unloading swift current mouth | |
| CN204704393U (en) | A kind ofly adopt sylphon seal and with the Material valve of insulation jacket structure | |
| CN104596245B (en) | A kind of special circumferential weld nozzle of superhigh temperature aerosolization ceramic material | |
| CN202195157U (en) | High temperature resistance needle valve | |
| CN205090790U (en) | Shaft furnace | |
| CN204533584U (en) | Abduction plunger type small flow regulates angle valve | |
| CN204778847U (en) | Petroleum coke pot -type calcining furnace cooling jacket | |
| CN207279021U (en) | A kind of adjustable springs back pressure nozzle | |
| CN205217960U (en) | Special crystallizer of horizontal continuous casting | |
| CN204692789U (en) | A kind of Novel warming siphunculus | |
| CN204493745U (en) | Transformer-cabinet vacuum butterfly valve | |
| CN206030495U (en) | PE pipe cooling sizing cover | |
| CN205534209U (en) | Rubber powder digester rubber seal | |
| CN202018943U (en) | Station head of energy-saving lamp tube sealing machine | |
| CN109865422A (en) | Chilling dry-process deacidification system | |
| CN106318410A (en) | Pyrolysis gas cooling and exporting device and method, cleaning method and pyrolysis system | |
| CN102975991A (en) | Novel storage tank | |
| CN209076077U (en) | A kind of anti-blocking rectifying tower | |
| CN206476948U (en) | It is pyrolyzed air cooling and guiding device and revolving bed pyrolysis system | |
| CN203926840U (en) | Inside and outside insulation jacket butterfly valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |