CN202802804U - Still kettle vacuumizing system - Google Patents
Still kettle vacuumizing system Download PDFInfo
- Publication number
- CN202802804U CN202802804U CN 201220358560 CN201220358560U CN202802804U CN 202802804 U CN202802804 U CN 202802804U CN 201220358560 CN201220358560 CN 201220358560 CN 201220358560 U CN201220358560 U CN 201220358560U CN 202802804 U CN202802804 U CN 202802804U
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- CN
- China
- Prior art keywords
- still kettle
- vavuum pump
- water
- vacuum pump
- cooling tower
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- 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.)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The utility model discloses a still kettle vacuumizing system comprising a cooling tower, a vacuum pump, and a control valve of a still kettle, wherein the interior of the still kettle is vacuumized by using the vacuum pump; the steam pumped from the interior of the still kettle enters the air inlet of the vacuum pump via the control valve, is cooled in the vacuum pump, and then is exhausted from the exhaust port of the vacuum pump; the hot water in the vacuum pump is conveyed in the cooling tower from a drain port to cool, and the cooling tower conveys the cooled cold water into the vacuum pump from the water inlet of the vacuum. By utilizing the still kettle vacuumizing system disclosed by the utility model, the steam remained in the still kettle after the cement product autoclaved curing is exhausted effectively and evenly in a short time by virtue of vacuumizing, the temperature of the products in the kettle is steadily and evenly reduced, and the occurrence of cracks of cement products is greatly reduced and even avoided; and meanwhile, the still kettle running period is shortened by more than 60 hours, so that the production efficiency is greatly improved.
Description
Technical field
The utility model relates to cement products still kettle technical field, relates in particular to a kind of still kettle pumped vacuum systems of fiber cement external wall panel.
Background technology
At present, in the production process of cement products, can carry out steam press maintenance to cement products, the cement products that is about to have certain initial strength is put into still kettle, then pass into high-temperature high-pressure steam, according to the intensification of technological requirement, boost and drawdown curve, product is carried out the maintenance of maintenance HTHP.
Existing steaming pressuring curing process has following defective or deficiency: when steam press maintenance finishes, temperature in the kettle is about 100-105 ℃, there are a large amount of steam to exist, discharge fast heat in the still if open immediately the still door, then the cement products temperature in the still also can sharply descend, and temperature is very inhomogeneous, can cause simultaneously cement products limit section and top layer moisture sharply to volatilize, cement products is under temperature stress and the acting in conjunction of drying shrinkage stress, produce easily tiny crackle or cracking, affect product strength and performance, even can cause the generation of a large amount of waste products; If progressively reduce temperature in the kettle or close the mode that the still door is lowered the temperature naturally and take slowly to open the still door, then can greatly prolong again the operation period of still kettle, reduce production efficiency, and, if temperature and humidity control is improper in the still kettle, cement products still has the possibility of cracking.
The utility model content
The technical problem that the utility model solves provides a kind of still kettle pumped vacuum systems, can be effectively, remain in water vapour in the still kettle behind the discharge water mud product steam press maintenance equably, stable and uniform ground reduces products temperature in the still, reduce even avoid the generation of cement products crackle, enhance productivity simultaneously.
For solving the problems of the technologies described above, the utility model provides a kind of still kettle pumped vacuum systems, and described system comprises the by-pass valve control of cooling tower, vavuum pump, still kettle,
To vacuumizing in the described still kettle, the described by-pass valve control of steam process of extracting out in the described still kettle enters the air inlet of described vavuum pump by described vavuum pump, after the cooling, discharges from the exhaust outlet of described vavuum pump in described vavuum pump;
Hot water in the described vavuum pump is sent into the described cooling tower from discharge outlet and is cooled off, and described cooling tower is sent into described vavuum pump with cooled cold water from the water inlet of described vavuum pump.
Further, the exhaust outlet of described vavuum pump enters the underwater of opening water tank with cooled steam, entering in the atmosphere after filtering through the water cooling in the described water tank.
Further, described cooling tower also has soft water and fills into mouth.
Further, described system also comprises switch board, described switch board be used for realizing described system supply of electric power, control the automatic cycle that opens and closes automatically and control soft water of each valve and pump and automatically filling into of soft water.
The utility model provides a kind of still kettle pumped vacuum systems, can be at short notice effectively by vacuumizing, remain in water vapour in the still kettle behind the discharge water mud product steam press maintenance equably, stable and uniform ground reduces products temperature in the still, significantly reduces even avoid the generation of cement products crackle; Simultaneously, the shortening still kettle has improved production efficiency more than 60 hours service cycle greatly.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the composition schematic diagram of still kettle pumped vacuum systems of the present utility model.
The specific embodiment
Be described in further detail below with reference to the enforcement of drawings and the specific embodiments to technical solutions of the utility model.
Referring to Fig. 1, the still kettle pumped vacuum systems of the utility model embodiment mainly comprises: the by-pass valve control of still kettle, and vavuum pump, and cooling tower, wherein:
The by-pass valve control of the steam process still kettle that is drawn out of in the still kettle enters the air inlet of vavuum pump, after the cooling, discharges from the exhaust outlet of vavuum pump in the vavuum pump pump chamber;
Hot water in the vavuum pump is sent into the cooling tower from discharge outlet and is cooled off, and cooling tower is sent into vavuum pump with cooled cold water from the water inlet of vavuum pump.
Wherein, vacuumize by vavuum pump and in still kettle, to form negative pressure, and progressively reduce negative pressure in the still kettle according to technological requirement, until the negative pressure in the still kettle is when reaching the moisture evaporation critical pressure value, ponding in the still kettle and the moisture of cement products inside will volatilize in a large number, and be extracted out still kettle by vavuum pump.
Wherein, the water that this still kettle pumped vacuum systems is used is soft water after treatment, and soft water recycles in this system, and the concrete recycle circuit of soft water is as follows:
When vavuum pump turned round, cold water (water temperature is lower) was sent into by water pump by water inlet, mixed part steam-condensation Cheng Shui with the steam that sucks vavuum pump in the vavuum pump pump chamber; Water is heated by steam simultaneously, discharges (water temperature is higher) by delivery port, and the hot water of discharge is sent into the cooling tower cooling by water pump, again sends into vavuum pump through cooled water through water pump.So circulation.
Owing in this cyclic process, have a certain amount of water volatilization loss through cooling tower the time, therefore, can fill into by the soft water of cooling tower a mouthful automatically additional soft water.
In addition, as shown in fig. 1, above-mentioned still kettle pumped vacuum systems also comprises switch board, this switch board is responsible for the automatic control of whole system, as automatically the filling into etc. of supply of electric power, the automatic cycle that opens and closes automatically and control soft water of controlling each valve and pump and soft water of system as described in realizing.
As shown in fig. 1, the circuit of the steam of extracting out in the still kettle is as follows: steam is drawn out of from the still kettle top, through by-pass valve control, enter the air inlet (vapor (steam) temperature is higher) of vavuum pump, mix with circulation soft water in the vavuum pump pump chamber, steam is cooled, and discharges from exhaust outlet, exhaust outlet is inserted into the underwater of opening water tank, enters in the atmosphere behind the further cold filtration of water in water tank.
In sum, directly to open still kettle behind the steam press maintenance in the prior art, naturally lower the temperature and discharge water steam, like this, open still kettle after, the outer Cryogenic air of still enters in the still, surface or the limit section temperature that can cause cement products to touch Cryogenic air sharply descend, and internal temperature reduces slowly, and different parts temperature inequality makes cement products produce larger temperature stress, cracks easily.And the utility model easy to crack or low problem of production efficiency when slowly opening the still door when behind steam press maintenance, fast opening the still door for fibre cement product, a kind of still kettle pumped vacuum systems is provided, it is by to vacuumizing in the still kettle, can be at short notice effectively, remain in water vapour in the still kettle behind the discharge water mud product steam press maintenance equably, stable and uniform ground reduces products temperature in the still, and can realize the preliminarily dried to cement products.Cement products Yin Wendu sharply changed and uneven when quick unlatching still door had effectively been avoided in the use of this system, and the moisture loss fine cracks or the cracking that cause, had also improved production efficiency simultaneously.
It below only is preferred case study on implementation of the present utility model; be not limited to the utility model; the utility model also can have other various embodiments; in the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (4)
1. a still kettle pumped vacuum systems is characterized in that, described system comprises the by-pass valve control of cooling tower, vavuum pump, still kettle,
To vacuumizing in the described still kettle, the described by-pass valve control of steam process of extracting out in the described still kettle enters the air inlet of described vavuum pump by described vavuum pump, after the cooling, discharges from the exhaust outlet of described vavuum pump in described vavuum pump;
Hot water in the described vavuum pump is sent into the described cooling tower from discharge outlet and is cooled off, and described cooling tower is sent into described vavuum pump with cooled cold water from the water inlet of described vavuum pump.
2. still kettle pumped vacuum systems as claimed in claim 1 is characterized in that,
The exhaust outlet of described vavuum pump enters the underwater of opening water tank with cooled steam, entering in the atmosphere after filtering through the water cooling in the described water tank.
3. still kettle pumped vacuum systems as claimed in claim 1 is characterized in that,
Described cooling tower also has soft water and fills into mouth.
4. still kettle pumped vacuum systems as claimed in claim 1 is characterized in that,
Described system also comprises switch board, described switch board be used for realizing described system supply of electric power, control the automatic cycle that opens and closes automatically and control soft water of each valve and pump and automatically filling into of soft water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220358560 CN202802804U (en) | 2012-07-23 | 2012-07-23 | Still kettle vacuumizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220358560 CN202802804U (en) | 2012-07-23 | 2012-07-23 | Still kettle vacuumizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202802804U true CN202802804U (en) | 2013-03-20 |
Family
ID=47861751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220358560 Expired - Lifetime CN202802804U (en) | 2012-07-23 | 2012-07-23 | Still kettle vacuumizing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202802804U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352852A (en) * | 2013-07-31 | 2013-10-16 | 南通龙鹰真空泵业有限公司 | Rotary vane type vacuum pump |
-
2012
- 2012-07-23 CN CN 201220358560 patent/CN202802804U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352852A (en) * | 2013-07-31 | 2013-10-16 | 南通龙鹰真空泵业有限公司 | Rotary vane type vacuum pump |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |
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| CX01 | Expiry of patent term |