CN216113389U - Vacuum pump switching device for oven - Google Patents

Abstract

The utility model discloses a vacuum pump switching device for an oven, which comprises: a box body; the buffer tank is communicated with the box body; a first vacuum valve is arranged between the first vacuum pump and the buffer tank, and the first vacuum valve is respectively communicated with the first vacuum pump and the buffer tank; the second vacuum pump, the second vacuum pump with be provided with the second vacuum valve between the buffer tank, the second vacuum valve respectively with the second vacuum pump with the buffer tank intercommunication, being provided with of buffer tank do benefit to and make the interior steady vacuum that produces of box, be favorable to reducing undulant, the break-make of first vacuum valve of user's accessible control and second vacuum valve to realize the switching of first vacuum pump and second vacuum pump, be favorable to avoiding only a vacuum pump to last for a long time and provide the negative pressure and lead to equipment fragile, the problem that equipment life reduces.

Description

Vacuum pump switching device for oven

Technical Field

The utility model relates to the technical field of vacuum ovens, in particular to a vacuum pump switching device for an oven.

Background

In the chemical synthesis process, a solvent or water is used for post-treatment of the product, and the final step of the post-treatment is to dry the product and remove the solvent or water. For mass production products, a vacuum oven is mostly used for drying materials at present, and in order to accelerate the material drying efficiency, the box body is vacuumized and heated under negative pressure. Because the mass production of products is large, the materials need to be dried in batches for many times, and the time for continuously drying the materials is longer.

Vacuum ovens on the market at present usually adopt an oil pump to provide negative pressure, but the oil pump works for a long time to provide continuous negative pressure for the ovens, so that equipment is easily damaged, and the service life of the equipment is shortened.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art.

The utility model provides a vacuum pump switching device for an oven, which comprises a box body; the buffer tank is communicated with the box body; a first vacuum valve is arranged between the first vacuum pump and the buffer tank, and the first vacuum valve is respectively communicated with the first vacuum pump and the buffer tank; and a second vacuum valve is arranged between the second vacuum pump and the buffer tank, and the second vacuum valve is respectively communicated with the second vacuum pump and the buffer tank.

According to the embodiment of the utility model, the vacuum pump switching device for the oven at least has the following beneficial effects: the box body is used for containing materials to be dried, the buffer tank is communicated with the box body and is respectively communicated with the first vacuum pump and the second vacuum pump, and the arrangement of the buffer tank is favorable for enabling the first vacuum pump and the second vacuum pump to generate stable vacuum degree in the box body and reducing fluctuation in the box body; the first vacuum valve is arranged between the first vacuum pump and the buffer tank and is respectively communicated with the first vacuum pump and the buffer tank; the second vacuum valve sets up between second vacuum pump and buffer tank, and communicate with second vacuum pump and buffer tank respectively, and first vacuum pump and second vacuum pump are independent mutually promptly, the break-make of first vacuum valve of user's accessible control and second vacuum valve to realize the switching of first vacuum pump and second vacuum pump, be favorable to avoiding single vacuum pump to provide the negative pressure for the box for a long time and lead to equipment fatigue, damage, and the problem that equipment life reduces appears.

According to some embodiments of the utility model, the system further comprises an exhaust pipe, and the outlet of the first vacuum pump and the outlet of the second vacuum pump are both in communication with the exhaust pipe.

This a vacuum pump auto-change over device for oven still includes the tail gas pipe, and the export of first vacuum pump and the export of second vacuum pump all communicate with the tail gas pipe, and the tail gas pipe be provided with do benefit to the tail gas collection of accomplishing first vacuum pump and second vacuum pump to be convenient for realize adopting this a vacuum pump auto-change over device for oven's pipeline to arrange, be favorable to saving the space that the pipeline was arranged, improve the compact structure nature in the vacuum oven.

According to some embodiments of the utility model, the utility model further comprises a vacuum line, and the tank body and the buffer tank, the buffer tank and the first vacuum pump and the buffer tank and the second vacuum pump are communicated through the vacuum line.

This a vacuum pump auto-change over device for oven still includes the vacuum line, and the vacuum line be provided with and do benefit to the gas tightness that ensures buffer tank and box, first vacuum pump and second vacuum pump intercommunication, can bleed to the box through first vacuum pump and second vacuum pump and take out wet, make the internal vacuum state that forms of box, reduce the boiling point of water to accelerate vacuum oven's stoving material speed.

According to some embodiments of the utility model, the first vacuum pump is an oil pump.

First vacuum pump is the oil pump, first vacuum pump can be the vacuum pump in vacuum oven from the area promptly, the user can be according to the evacuation degree that required material was dried, the kind of material and the drying degree of material isoparametric, thereby select first vacuum pump or second vacuum pump to carry out the evacuation to the box, be favorable to improving this a vacuum pump auto-change over device's for the oven suitability, and through the switching of first vacuum pump and second vacuum pump, in turn, be favorable to avoiding leading to the problem appearance of equipment life reduction because the long-time work of single vacuum pump.

According to some embodiments of the utility model, the second vacuum pump is a diaphragm pump or a water pump.

Specifically, the second vacuum pump can be a diaphragm pump which has the characteristics of high vacuum degree and low power, is beneficial to reducing production noise, achieves the effect of energy conservation while not influencing the production efficiency, and accords with the environmental protection idea; similarly, the second vacuum pump can be a water pump, and the water pump has the characteristics of high air extraction amount and small power, is favorable for realizing air extraction and dehumidification of the box body, and can also achieve the effect of energy conservation.

According to some embodiments of the utility model, the utility model further comprises a third vacuum valve; the third vacuum valve is arranged between the box body and the buffer tank and is respectively communicated with the box body and the buffer tank.

The vacuum pump switching device for the oven further comprises a third vacuum valve, the third vacuum valve is arranged between the box body and the buffer tank, materials in the box body can be protected from being polluted after the third vacuum valve is closed, the problem that moisture, solvent residue or engine oil in the buffer tank is prevented from being sucked into the box body is solved, and the using requirement of the vacuum pump switching device for the oven is met.

According to some embodiments of the utility model, the third vacuum valve is a solenoid valve.

The third vacuum valve is an electromagnetic valve, so that a user can open or close the third vacuum valve in an electric control mode, the electromagnetic valve is simple and reliable in structure, and the use requirement of the third vacuum valve can be met.

According to some embodiments of the utility model, the vacuum valve further comprises a first switch and a second switch, the first switch, the oil pump and the second switch being connected in series in sequence between the positive pole and the negative pole of the power source, the third vacuum valve comprises a first terminal and a second terminal, the first terminal is connected between the first switch and the oil pump, and the second terminal is connected between the second switch and the negative pole of the power source.

The third vacuum valve of traditional vacuum oven is correlated with the oil pump, when the oil pump was closed, the third vacuum valve was closed correspondingly, thereby avoid the machine oil of oil pump to suck the problem that leads to the polluted materials in the box backward, this a vacuum pump auto-change over device for oven still is provided with the second switch, the first wiring end and the second wiring end of third vacuum valve pass through the wire and are connected to between first switch and the oil pump respectively and between second switch and the power negative pressure, be promptly the third vacuum pump connect in parallel to oil pump and second switch on, make oil pump and third vacuum valve independent each other, thereby can realize the function that first vacuum pump and second vacuum pump switch, the third vacuum valve plays the effect of overall control to the evacuation of vacuum oven, satisfy this a vacuum pump auto-change over device's for oven user demand.

According to some embodiments of the utility model, the first vacuum valve and the second vacuum valve are ball valves.

First vacuum valve and second vacuum valve all can set up to the ball valve, and the ball valve has lower flow resistance, and is applicable in the evacuation and uses, and the structure of ball valve is comparatively simple, reliable, the leakproofness is better, can realize the function of control vacuum pipeline break-make, satisfies this a vacuum pump auto-change over device's for the oven user demand.

According to some embodiments of the utility model, the utility model further comprises a blow valve, the blow valve being in communication with the tank.

This a vacuum pump auto-change over device for oven still includes atmospheric valve, opening and close of user's accessible atmospheric valve to realize the function of replacement air in the box, satisfy vacuum oven's user demand.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a piping layout diagram of a vacuum pump switching device for an oven according to an embodiment of the present invention;

fig. 2 is a partial circuit diagram of a vacuum pump switching device for an oven according to an embodiment of the present invention.

In the drawings: 100-a box body; 200-a buffer tank; 310-a first vacuum pump; 320-a second vacuum pump; 410-a first vacuum valve; 420-a second vacuum valve; 430-a third vacuum valve; 510-a first switch; 520-a second switch; 600-tail gas pipe.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of the terms are not limited to a certain number, and a plurality of the terms are two or more, and the terms larger, smaller, larger, and the like are understood to include the number of the terms, and the terms larger, smaller, and the like are understood to include the number of the terms. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Additionally, appearing throughout and/or representing three side-by-side scenarios, e.g., A and/or B represents a scenario satisfied by A, a scenario satisfied by B, or a scenario satisfied by both A and B.

In the description of the present invention, there is a phrase containing a plurality of parallel features, wherein the phrase defines the closest feature, for example: b, C disposed on A, E connected to D, B disposed on A, E connected to D, C is not limited; however, terms indicating relationships between features such as "spaced apart", "arranged in a ring", etc. do not fall within this category. The phrase preceded by the word "mean" indicates that it is a definition of all features in the phrase, and if it is B, C, D, it indicates that both B, C and D are located on a.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Vacuum oven on the market at present uses the oil pump to provide the negative pressure usually, and the power of oil pump is great, and because the material that dries by the fire is the semidry product, contains solvent or water, dissolves incomplete oil tank that can get into the oil pump through negative pressure evaporation, can pollute the oil, after dissolving incomplete entering certain proportion, can influence the vacuum of oil pump gradually, and then influences the drying efficiency of material, brings certain potential safety hazard even. Therefore, in order to avoid the problems of drying materials and safety, the oil in the oil tank can be replaced regularly in actual production so as to ensure the vacuum effect and the safety performance of the vacuum oven.

At present, an oil pump is generally used for vacuumizing the oven, and the following defects exist: 1. the long-term operation of the oil pump easily causes equipment fatigue and affects the service life; 2. when the oil pump continuously provides the negative pressure and dries by fire the material, can dissolve the incomplete oil tank of taking into with the material, pollute the oil, influence vacuum oven's vacuum, have the safety risk, if regularly change machine oil every day, also can influence production efficiency, the cost is also high. 3. In the back section of material drying, the volatilization amount of the solvent is reduced, the pumping speed of the oil pump is relatively overhigh, the power is higher, and the waste of energy is easily caused. 4. The oil pump has large noise and causes certain adverse effect on the environment.

An embodiment of the present invention will be described below with reference to fig. 1 to 2.

Embodiment one, referring to fig. 1, an embodiment of the present invention provides a vacuum pump switching apparatus for an oven, including: a tank 100, a buffer tank 200, a first vacuum pump 310, and a second vacuum pump 320.

Specifically, the box 100 may be used to accommodate materials to be dried, and for mass production, the products may be put into the box 100 in batches to dry the materials. The box body 100 is communicated with the buffer tank 200, the buffer tank 200 is respectively communicated with the first vacuum pump 310 and the second vacuum pump 320, and the buffer tank 200 has a buffer effect on the vacuumizing of the first vacuum pump 310 and the second vacuum pump 320, so that a stable vacuum degree is generated in the box body 100, and the fluctuation caused by the vacuumizing in the box body 100 is favorably reduced.

The vacuum pump switching device for the oven further includes a first vacuum valve 410 and a second vacuum valve 420; the first vacuum valve 410 is arranged between the first vacuum pump 310 and the buffer tank 200 and is respectively communicated with the first vacuum pump 310 and the buffer tank 200; the second vacuum valve 420 is arranged between the second vacuum pump 320 and the buffer tank 200, and is respectively communicated with the second vacuum pump 320 and the buffer tank 200, the buffer tank 200 and the box body 100, and the connection between the first vacuum pump 310 and the second vacuum pump 320 are communicated by vacuum pipelines, so that the air tightness of the vacuum pump switching device for the oven is ensured, the vacuum degree in the box body 100 is kept, the air suction and the moisture extraction in the box body 100 are realized, and the drying is accelerated through negative pressure.

The first vacuum pump 310 and the second vacuum pump 320 are independent of each other, so that a user can automatically switch the first vacuum pump 310 or the second vacuum pump 320 to work according to the amount of the materials to be dried, the types of the materials to be dried, different drying stages and other factors, and provide continuous negative pressure for the interior of the box body 100.

Specifically, first vacuum pump 310 can be the oil pump, and first vacuum pump 310 can be the vacuum pump of vacuum oven own promptly, and second vacuum pump 320 can adopt diaphragm pump and water pump, and the user can realize first vacuum pump 310 and second vacuum pump 320's switching through the break-make of controlling first vacuum valve 410 and second vacuum valve 420, is favorable to avoiding single vacuum pump long-time work and leads to the problem that equipment life is short to appear.

The diaphragm pump has the characteristics of high vacuum degree and low power, is beneficial to reducing production noise, achieves the effect of energy conservation while not influencing the production efficiency, and accords with the environmental protection idea; similarly, the second vacuum pump 320 may be a water pump, which has the characteristics of high air extraction amount and low power, and is beneficial to implementing air extraction and dehumidification on the box 100, and also can achieve the effect of energy saving.

The utility model provides a vacuum pump switching device for an oven, which is characterized in that an auxiliary vacuum pump (or called second vacuum pump 320) capable of freely switching low power and high vacuum degree is added on the basis of negative pressure material drying of an oil pump (or called first vacuum pump 310) to provide continuous negative pressure material drying for the oven, so that the service life of engine oil in the oil pump is prolonged, noise is reduced, the production efficiency is not influenced, meanwhile, the auxiliary vacuum pump with lower power is used to achieve the effect of energy saving, the cost is reduced, and the concept of environmental protection is met.

Further preferably, the vacuum pump switching device for the oven further comprises an exhaust pipe 600, the outlet of the first vacuum pump 310 and the outlet of the second vacuum pump 320 are both communicated with the exhaust pipe 600, that is, the exhaust gas generated by the first vacuum pump 310 and the second vacuum pump 320 is collected to the exhaust pipe 600 and discharged, and the exhaust pipe 600 is provided to facilitate the completion of the exhaust gas collection of the first vacuum pump 310 and the second vacuum pump 320, so that the pipeline arrangement of the vacuum oven adopting the vacuum pump switching device for the oven is facilitated, the space for pipeline arrangement is facilitated to be saved, and the structural compactness in the vacuum oven is improved.

Further preferably, the vacuum pump switching device for the oven further comprises a third vacuum pump, the third vacuum pump is arranged between the box body 100 and the buffer tank 200 and is respectively communicated with the box body 100 and the buffer tank 200, the third vacuum valve 430 has an overall control function on the vacuum pumping of the vacuum oven, when the third vacuum valve 430 is opened, a user can pump the inside of the box body 100 by switching the first vacuum pump 310 or the second vacuum pump 320, and when the third vacuum valve 430 is closed, namely the vacuum pumping function of the vacuum oven is closed, the material in the box body 100 can be protected from being polluted after the third vacuum valve 430 is closed, so that the problem that moisture, residual solvent or engine oil in the buffer tank 200 is sucked into the box body 100 can be avoided, and the use requirement of the vacuum pump switching device for the oven can be met.

Further preferably, the third vacuum valve 430 is an electromagnetic valve, so that a user can open or close the third vacuum valve 430 in an electrically controlled manner, and the electromagnetic valve has a simple and reliable structure and can meet the use requirement of the third vacuum valve 430.

Referring to fig. 2, it is further preferable that the existing vacuum oven provides a continuous vacuum to the box 100 through the oil pump, and a solenoid valve (third vacuum valve 430) is disposed between the box 100 and the buffer tank 200 of the oil pump, and is connected to the power supply of the oil pump, and when the oil pump is turned off, the solenoid valve is correspondingly turned off, so as to prevent the oil in the oil tank of the oil pump from being sucked back, and protect the materials in the box 100 from being polluted.

The vacuum pump switching device for the oven is improved on the basis of the original circuit, so that the vacuum pump switching device is suitable for the switching functions of the first vacuum pump 310 and the second vacuum pump 320.

The vacuum pump switching device for the oven further comprises a first switch 510 and a second switch 520, the first switch 510, the oil pump and the second switch 520 are sequentially connected in series between the positive pole and the negative pole of the power supply in the circuit arrangement, the third vacuum valve 430 comprises a first terminal and a second terminal, the first terminal is connected between the first switch 510 and the oil pump through a conducting wire, the second terminal is connected between the second switch 520 and the negative pole of the power supply through a conducting wire, namely the third vacuum valve 430 is connected in parallel on the oil pump and the second switch 520.

The first switch 510 is a control switch for the vacuum pumping function of the vacuum oven, the second switch 520 is used for controlling the operation or stop of the oil pump, and the third vacuum valve 430 is connected in parallel to the oil pump and the second switch 520, so that the oil pump can be independently switched on and off, the on-off of the third vacuum valve 430 is not affected, and the circuit is applicable to the vacuum pump switching device for the oven.

The first vacuum valve 410 and the second vacuum valve 420 are connected in parallel to the positive pole and the negative pole of the power supply, that is, the first vacuum valve 410 and the second vacuum valve 420 are independent from each other, so that the use requirement of the vacuum pump switching device for the oven is met.

Further preferably, first vacuum valve 410 and second vacuum valve 420 all can set up to the ball valve, and the ball valve has lower flow resistance, and is applicable in the evacuation and uses, and the structure of ball valve is comparatively simple, reliable, leakproofness is better to realize the function of control vacuum pipeline break-make, satisfy this a vacuum pump auto-change over device's for the oven user demand. The first and second vacuum valves 410 and 420 may also be provided as solenoid valves.

Further preferably, utility model discloses still include the atmospheric valve, atmospheric valve and box 100 intercommunication, user's accessible atmospheric valve to realize the function of replacement air in the box 100, satisfy vacuum oven's user demand.

Specifically, the first vacuum pump 310 may adopt an oil pump of a vacuum oven of model d zf6210, the second vacuum pump 320 may adopt a diaphragm pump of model MD 4C NT, and the second vacuum pump 320 may adopt a water jet vacuum unit of model LCSP-70-100, so as to realize the function of providing continuous negative pressure to the box 100 by switching the first vacuum pump 310 and the second vacuum pump 320, and achieve the effects of saving energy and reducing noise.

When in use: the door and the vent valve of the oven body 100 can be closed first, the connection of the vacuum pipeline and the sealing of the oven body 100 can be checked and confirmed, after the confirmation is correct, the power supply of the vacuum oven is turned on, then the vacuumizing switch of the oven is turned on, at this moment, the oil pump (or first vacuum pump 310) reduces the vacuum degree of the box 100, and when the vacuum degree reaches 200pa, the diaphragm pump (or called as the second vacuum pump 320) can be started in advance, the diaphragm pump pre-pumps the vacuum pipeline communicated with the diaphragm pump for 1min so as to ensure that the vacuum degree of the vacuum pipeline reaches an ideal value which can be provided by the diaphragm pump, then the first vacuum valve 410 of the buffer tank 200 and the oil pump tank is closed, and then the second switch 520 connected with the oil pump end is closed, so that the oil pump is shut down but the third electromagnetic valve is normally operated, and then the second vacuum valve 420 connecting the buffer tank 200 and the diaphragm pump is opened, and the switching between the first vacuum pump 310 and the second vacuum pump 320 is completed.

While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims (10)

1. A vacuum pump switching apparatus for an oven, comprising:

a box body;

the buffer tank is communicated with the box body;

a first vacuum valve is arranged between the first vacuum pump and the buffer tank, and the first vacuum valve is respectively communicated with the first vacuum pump and the buffer tank;

and a second vacuum valve is arranged between the second vacuum pump and the buffer tank, and the second vacuum valve is respectively communicated with the second vacuum pump and the buffer tank.

2. The vacuum pump switching device for the oven according to claim 1, further comprising an exhaust pipe, wherein both the outlet of the first vacuum pump and the outlet of the second vacuum pump are communicated with the exhaust pipe.

3. The vacuum pump switching device for the oven according to claim 2, further comprising a vacuum line through which the tank and the buffer tank, the buffer tank and the first vacuum pump, and the buffer tank and the second vacuum pump are communicated.

4. A vacuum pump switching apparatus for an oven as claimed in claim 1, wherein the first vacuum pump is an oil pump.

5. A vacuum pump switching device for an oven according to claim 4, characterized in that the second vacuum pump is a diaphragm pump or a water pump.

6. The vacuum pump switching apparatus for an oven according to claim 5, further comprising a third vacuum valve; the third vacuum valve is arranged between the box body and the buffer tank and is respectively communicated with the box body and the buffer tank.

7. A vacuum pump switching device for an oven as claimed in claim 6, wherein the third vacuum valve is a solenoid valve.

8. A vacuum pump switching device for an oven as claimed in claim 7, further comprising a first switch and a second switch, the first switch, the oil pump and the second switch being connected in series in sequence between a positive pole and a negative pole of a power supply, the third vacuum valve comprising a first terminal and a second terminal, the first terminal being connected between the first switch and the oil pump, the second terminal being connected between the second switch and the negative pole of the power supply.

9. The vacuum pump switching device for the oven as claimed in any one of claims 1 to 8, wherein the first vacuum valve and the second vacuum valve are ball valves.

10. A vacuum pump switching apparatus for an oven as claimed in claim 9, further comprising a blow valve in communication with the tank.

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