CN204854171U - Vacuum drying oven - Google Patents
Vacuum drying oven Download PDFInfo
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- CN204854171U CN204854171U CN201520613951.6U CN201520613951U CN204854171U CN 204854171 U CN204854171 U CN 204854171U CN 201520613951 U CN201520613951 U CN 201520613951U CN 204854171 U CN204854171 U CN 204854171U
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- angle pedestal
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Abstract
The utility model relates to a vacuum drying oven, including box, heater and vacuum pump, be equipped with extraction opening and air inlet on the box, the vacuum pump is connected with the extraction opening through the pipeline of bleeding, and the one end of an air inlet and an air inlet pipeline feeds through, and the cluster is equipped with a controllable valve on the air inlet pipeline, and the drying cabinet still includes a controlling means, controlling means's control signal output end control connects controllable valve. Adopt automatic control, can lighten operating personnel's intensity of labour, effectively avoid the otherness of operation, avoid effectively that the manual control flap of carrying on brings open the valve time the dynamics size variant, and then prevent the equal different circumstances of control in the aspect of the not of uniform size and opening time of degree of opening, effectively avoid misoperation to result in the vacuum system return water to pollute the risk of material simultaneously.
Description
Technical field
The utility model relates to a kind of vacuum drying chamber.
Background technology
Vacuum drying, under exactly the material that needs are dry being in vacuum condition, carries out heat drying.It utilizes vavuum pump to carry out bleeding dehumidifier, makes to form vacuum state in operating room, accelerates rate of drying.When heating-up temperature is constant, gas clean-up, can accelerate rate of drying; Surely cycle constant, improves heating-up temperature, can accelerate rate of drying; Both gas clean-up, improves heating-up temperature again, then greatly can accelerate rate of drying.
Vacuum drying chamber is as a kind of drying equipment, according to the water principle that under low pressure boiling temperature is low, the moisture content rapid vaporization in dried water-containing materials is made to pass through vacuum suction, discharge and reach dry object, compared with more common drying means, there is rate of drying fast, pollute little and feature that is that can not damage the intrinsic characteristic of dried article, it is large that vacuum drying chamber is specially adapted to material viscosity, the drying of the material of thermal sensitivity difference, it can realize material and realize drying at a lower temperature, the dried material of vacuum drying chamber is used to have loose, the feature of porous, there is the advantage easily pulverized.Therefore, vacuum drying chamber is widely used in the industries such as medicine, food, light industry, chemical industry, electronics, Aero-Space.
Vacuum drying chamber is generally made up of vacuum chamber, material loading tray, vacuum pick-up system, heating system, drainage etc., and supporting have vavuum pump.The heating tubulation that thermal source is provided is had in the casing of vacuum drying chamber, its mode of heating generally adopts the mode of steam or hot water circulation heated, the tubulation of heating can place material loading tray, when material loading is complete, the door of vacuum drying chamber is closed, open vavuum pump and valve, open computer heating control valve, namely material heats under vacuum conditions, the damp-heat water steam that material produces after the heating is discharged by vacuum pick-up system, thus reaches dry object.Material is in dry run, in initial time section, it is comparatively rapid that moisture evaporates, arrive the middle and later periods of heating, moisture evaporation rate is then slower, in order to accelerate rate of drying, generally be configured with an atmospheric valve at the body side of drying box, the later stage of drying regularly can open atmospheric valve, make entering part fresh air or other inert gases in casing, the moisture of the gas entered under vacuum conditions to oven interior forms one and drives, moisture can with vacuum system Accelerating Removal, thus reach the object improving drying efficiency, the method is widely used on each vacuum drying chamber.Such as application number is disclose a kind of convection type vacuum drying oven in the Chinese patent application file of 201120494879.1, as shown in Figure 1, comprise casing, vavuum pump, heater, bleeding point, air inlet, bleeding point is connected by pipeline with vavuum pump, air inlet passes into inert gas or dry gas, in casing, form convection current, the gas that object to be dried evaporates is extracted out.But the air inlet in this application relies on manually to carry out by-pass valve control, there is the random larger feature of operation, the dynamics size of different people when Open valve causes the control in open degree not of uniform size and opening time all different, opening excessive or opening time extends a little, often cause system vacuum greatly to reduce, drying efficiency does not rise and instead falls or cause vacuum returnline to cause material contaminated.
Utility model content
The purpose of this utility model is to provide a kind of vacuum drying chamber, in order to solve the problem that existing drying box easily causes drying efficiency to reduce when Non-follow control air inlet.
For achieving the above object, scheme of the present utility model comprises a kind of vacuum drying chamber, comprise casing, heater and vavuum pump, casing is provided with bleeding point and air inlet, and vavuum pump is connected with bleeding point by exhaust pipe, and air inlet is communicated with one end of an air inlet pipeline, on air inlet pipeline, string is provided with a valve, described valve is controllable valve, and described drying box also comprises a control device, controllable valve described in the control signal output control connection of described control device.
Described controllable valve is pneumatic angle pedestal valve, described control device is a control circuit, described control circuit comprises two power lines, the first branch road and the second branch road is connected with between power line, first branch road is serially connected with one and often opens button and the time relay, the described time relay is in parallel with an auxiliary reclay, and a normally opened contact of described auxiliary reclay is with described often to drive button in parallel; Instantaneous closed, the time delay that described second branch road are serially connected with the described time relay disconnect normally opened contact and a magnetic valve, the control end of pneumatic angle pedestal valve described in the output control connection of described magnetic valve.
Described controllable valve is magnetic valve, and described control device is controller, the magnetic valve described in described controller control connection.
Described controllable valve is pneumatic angle pedestal valve, and described control device comprises controller and magnetic valve, and described controller control connection magnetic valve, described solenoid control connects the control end of described pneumatic angle pedestal valve.
Described pneumatic angle pedestal valve is double acting pneumatic angle pedestal valve, and described magnetic valve has two outputs, is connected respectively two control ends of double acting pneumatic angle pedestal valve.
The other end of described air inlet pipeline is connected with one enters gas respirator for dry and filtration.
Described air inlet pipeline is composed in parallel by main road and bypass, and on main road, string is provided with described controllable valve and a quick opening valve, and on described bypass, string is provided with a bypath valve.
Described bleeding point be arranged on casing top and in the left side of casing, described air inlet be arranged on casing bottom and on the right side of casing.
Air inlet is connected with a valve by air inlet pipeline, this valve can control gas and enter in casing, this valve is controllable valve, this controllable valve of control signal output control connection of control device, control device automatically controls opening of controllable valve according to the control strategy set or closes, valve can be made to carry out corresponding switch in the moment set, and control accuracy is high, enhances drying efficiency; Adopt and automatically control, the labour intensity of operating personnel can be alleviated, effectively avoid the otherness operated, dynamics size when effectively avoiding manually carrying out the Open valve that by-pass valve control brings is variant, and then prevent all different situation of open degree control not of uniform size and opening time aspect, effectively avoid operate miss to cause the risk of vacuum system backwater contaminated material simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of vacuum drying chamber of the prior art;
Fig. 2 is the structural representation of the first embodiment of vacuum drying chamber that the utility model provides;
Fig. 3 is the structural representation of vacuum drying chamber the second embodiment that the utility model provides;
Fig. 4 is the structural representation of the third embodiment of vacuum drying chamber that the utility model provides.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in more detail.
Vacuum drying chamber as shown in Figure 2, comprises casing 2, heater and vavuum pump, and casing is provided with bleeding point and air inlet.In the present embodiment, bleeding point be arranged on casing top and in the left side of casing, air inlet be arranged on casing bottom and on the right side of casing.Bleeding point and air inlet lay respectively at the offside of casing, can guarantee that dry air or inert gas are to the best dispersion effect of the hot and humid gas in casing.Vavuum pump is connected with bleeding point by exhaust pipe 1, air inlet is communicated with one end of air inlet pipeline, on air inlet pipeline, string is provided with pneumatic angle pedestal valve 4, and the front end string of pneumatic angle pedestal valve 4 is provided with a quick opening valve, the effect of opening, closing after drying terminates when this valve plays dry beginning.A bypath valve is in parallel with the series arm of pneumatic angle pedestal valve and quick opening valve.Be serially connected with respirator 5 at the other end of air inlet pipeline, air or inert gas are entered in air inlet pipeline by this respirator.The filter core of respirator adopts the hydrophobicity filter core of 0.22 micron, can carry out drying and filtration to the air entered in casing or inert gas, avoids there is the impurity that can pollute institute's dried material in gas.
In the present embodiment, controlled the break-make of pneumatic angle pedestal valve by a control circuit.
This control circuit comprises two power lines, is connected with three branch roads, Article 1 branch road is connected in series indicator lamp 9 between power line; Article 2 branch road is serially connected with 18, one, a normally closed button and often opens button 8 and time relay coil 10, time relay coil 10 is in parallel with auxiliary reclay coil 11, time relay coil 10 is in parallel with indicator lamp 13, and the normally opened contact 12 of auxiliary reclay is in parallel with often driving button 8; Instantaneous closed, the time delay that 3rd branch road are serially connected with the time relay disconnect normally opened contact 14 and magnetic valve 15.
Unlatching and the shutoff of pneumatic angle pedestal valve 4 are controlled by magnetic valve 15, and pneumatic angle pedestal valve is double acting pneumatic angle pedestal valve, and it has two control ends, and correspondingly, magnetic valve has two gas output ends, respectively two control ends of corresponding control connection pneumatic angle pedestal valve.Magnetic valve concrete the electric time and again the electric time interval is controlled by the circulating time relay, magnetic valve input input compressed-air is as control gas, magnetic valve is obtaining under electric and dead electricity, two gas output end can be communicated with input respectively, exports corresponding high voltage control gas.In two control ends of pneumatic angle pedestal valve, when one of them loads high pressure gas, corresponding angles seat valve open-minded; When another loads high pressure gas, the shutoff of corresponding angles seat valve.Magnetic valve provides high voltage control gas by giving two control ends of pneumatic angle pedestal valve respectively, can realize opening or turning off of pneumatic angle pedestal valve.Both belong to prior art at concrete annexation, do not repeat here.
The early stage of drying, damp-heat air is easy to be taken away by vacuum line, therefore phase before it is dried, keep the valve on air inlet pipeline to be all in closed condition.Phase after the drying, for improving drying efficiency, by the power supply opening in control circuit, then the quick opening valve on air inlet pipeline is opened, then pneumatic angle pedestal valve is opened after reaching the time T2 of setting, and dry air or inert gas enter in casing, forms dispersion effect to the damp-heat air in casing, pneumatic angle pedestal valve open time delay turns off to setting-up time T1, stops entering dry air or inert gas.At whole the later stage of drying, the opening and turn off by the time relay and magnetic valve co-controlling of pneumatic angle pedestal valve, the opening time T1 of Pneumatic automatic-control angle pedestal valve and T2 interval time again opened, controls and do action automatically.So this time relay 10 is the circular form time relay.
Concrete control procedure is:
Under powering-off state or when other do not affect normal work, T1 and the T2 value of setting-up time relay, T1 is the time needing to pass into dry air or inert gas, and T2 is the time interval again passing into dry air or inert gas.
The power switch 6 closed on control circuit, power supply powers to indicator lamp 9 through fuse 7 and normally closed button 19, and power supply indicator 9 is bright, and power supply is connected.
Press and often drive button 8, time relay coil 10, auxiliary reclay coil 11 and relay indicating light 13 simultaneously electric, the normally opened contact 12 of auxiliary reclay is instantaneous closed, and relay indicating light HL2 is bright, and instantaneous closed, the time delay of the time relay disconnect normally opened contact 14 and close instantaneously.The time relay enters delay state.Meanwhile, magnetic valve 15 obtains electric in instantaneous closed, that time delay disconnection normally opened contact 14 is closed moment.Magnetic valve is when obtaining electric, and valve core of the electromagnetic valve is P-B conducting under compressed-air actuated effect, and compressed air enters one of them control end of pneumatic angle pedestal valve by the road, and now pneumatic angle pedestal valve is in off state, and dry air or inert gas cannot pass in casing, when after elapsed time T2, the time relay is instantaneous closed, time delay disconnects normally opened contact 14 and disconnects, magnetic valve dead electricity, valve core of the electromagnetic valve resets under the action of the spring, now magnetic valve P-B disconnects, P-A conducting, compressed air enters another control end of pneumatic angle pedestal valve through P-A and compressed-air hose, pneumatic angle pedestal valve conducting, dry air or inert gas enter in vacuum drying box body, the expulsion of the damp-heat air of box house is walked to vacuum pipe side draught, reach the effect of driveing, thus raising drying efficiency, after inlet period reaches T1, the instantaneous of the time relay closes, time delay disconnects normally opened contact 14 and again closes, pneumatic angle pedestal valve closes and again turns off.Above actuation cycle, terminates until dry.
As the time relay needs to reset, then press normally closed button 18, can realize resetting.At the end of drying, can bypath valve be opened, the chamber door of drying box will be opened after drying box emptying.
In above-described embodiment, give the concrete control planning between a kind of magnetic valve and pneumatic angle pedestal valve, but, the utility model is not limited to above-described embodiment, because pneumatic angle pedestal valve has Chang Kai and normally closed two kinds of modes, when pneumatic angle pedestal valve is open type pneumatic angle pedestal valve and closed type two kinds of modes time, the mode of solenoid control pneumatic angle pedestal valve is just in time contrary.And, pneumatic angle pedestal valve is divided into single-acting and double acting two kinds, single-acting pneumatic angle pedestal valve has a control end, double acting has two control ends, and the pneumatic angle pedestal valve in above-described embodiment is double acting pneumatic angle pedestal valve, when pneumatic angle pedestal valve is single-acting pneumatic angle pedestal valve, carry out pilot angle seat valve by whether to its control end input high voltage control gas to turn on and off, so correspondingly, magnetic valve will be changed to the magnetic valve of an output.
A kind of specific embodiment of control device is given in above-described embodiment, it is a kind of control circuit, as other embodiment, this control device can also be an intelligent controller, air inlet pipeline is gone here and there the valve set as magnetic valve, controller control connection magnetic valve, control program is provided with in controller, can the control PWM ripple that turns on and off of output solenoid valve, magnetic valve is when opening, and dry gas or inert gas enter in casing, and magnetic valve is when turning off, dry gas or inert gas cannot enter in casing, as shown in Figure 3.
In addition, as another embodiment, as shown in Figure 4, this control device is intelligent controller and magnetic valve, air inlet pipeline is gone here and there the valve set as pneumatic angle pedestal valve, controller control connection magnetic valve, solenoid control connects pneumatic angle pedestal valve, is provided with control program in controller, can the control PWM ripple that turns on and off of output solenoid valve, the part of solenoid control pneumatic angle pedestal valve is existing in the above-described embodiments to be described, and does not repeat here.
Wherein, in Fig. 3 and Fig. 4, for other parts of drying box and identical in above-mentioned enforcement, so do not draw.
In addition, the equipment body part of vacuum drying chamber described in detail is not had to be the common practise of prior art or this area in the present embodiment.
Be presented above concrete embodiment, but the utility model is not limited to described embodiment.Basic ideas of the present utility model are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present utility model, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out embodiment when not departing from principle of the present utility model and spirit, amendment, replacement and modification still fall in protection domain of the present utility model.
Claims (8)
1. a vacuum drying chamber, comprise casing, heater and vavuum pump, casing is provided with bleeding point and air inlet, vavuum pump is connected with bleeding point by exhaust pipe, and air inlet is communicated with one end of an air inlet pipeline, and on air inlet pipeline, string is provided with a valve, it is characterized in that, described valve is controllable valve, and described drying box also comprises a control device, controllable valve described in the control signal output control connection of described control device.
2. vacuum drying chamber according to claim 1, it is characterized in that, described controllable valve is pneumatic angle pedestal valve, described control device is a control circuit, described control circuit comprises two power lines, is connected with the first branch road and the second branch road between power line, the first branch road is serially connected with one and often opens button and the time relay, the described time relay is in parallel with an auxiliary reclay, and a normally opened contact of described auxiliary reclay is with described often to drive button in parallel; Instantaneous closed, the time delay that described second branch road are serially connected with the described time relay disconnect normally opened contact and a magnetic valve, the control end of pneumatic angle pedestal valve described in the output control connection of described magnetic valve.
3. vacuum drying chamber according to claim 1, is characterized in that, described controllable valve is magnetic valve, and described control device is controller, the magnetic valve described in described controller control connection.
4. vacuum drying chamber according to claim 1, it is characterized in that, described controllable valve is pneumatic angle pedestal valve, and described control device comprises controller and magnetic valve, described controller control connection magnetic valve, described solenoid control connects the control end of described pneumatic angle pedestal valve.
5. the vacuum drying chamber according to claim 2 or 4, is characterized in that, described pneumatic angle pedestal valve is double acting pneumatic angle pedestal valve, and described magnetic valve has two outputs, is connected respectively two control ends of double acting pneumatic angle pedestal valve.
6. vacuum drying chamber according to claim 1, is characterized in that, the other end of described air inlet pipeline is connected with one enters gas respirator for dry and filtration.
7. vacuum drying chamber according to claim 1, is characterized in that, described air inlet pipeline is composed in parallel by main road and bypass, and on main road, string is provided with described controllable valve and a quick opening valve, and on described bypass, string is provided with a bypath valve.
8. vacuum drying chamber according to claim 1, is characterized in that, described bleeding point be arranged on casing top and in the left side of casing, described air inlet be arranged on casing bottom and on the right side of casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520613951.6U CN204854171U (en) | 2015-08-14 | 2015-08-14 | Vacuum drying oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520613951.6U CN204854171U (en) | 2015-08-14 | 2015-08-14 | Vacuum drying oven |
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| Publication Number | Publication Date |
|---|---|
| CN204854171U true CN204854171U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520613951.6U Active CN204854171U (en) | 2015-08-14 | 2015-08-14 | Vacuum drying oven |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028207A (en) * | 2017-03-21 | 2017-08-11 | 延安大学 | A kind of vacuum fruits and vegetables rapid dryer |
| CN108185275A (en) * | 2018-01-23 | 2018-06-22 | 青岛博瑞设备制造有限公司 | A kind of food vacuum drying machine |
-
2015
- 2015-08-14 CN CN201520613951.6U patent/CN204854171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028207A (en) * | 2017-03-21 | 2017-08-11 | 延安大学 | A kind of vacuum fruits and vegetables rapid dryer |
| CN108185275A (en) * | 2018-01-23 | 2018-06-22 | 青岛博瑞设备制造有限公司 | A kind of food vacuum drying machine |
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