CN215412771U - Vacuum drying tank - Google Patents

Abstract

The utility model provides a vacuum drying tank which comprises a tank body, a first flange frame, a first sealing frame and an oil guide pipe. Wherein the tank body is provided with an opening; the first flange frame is arranged on the end face of the opening in a sealing mode, and the part, arranged on the end face of the bottom of the opening, of the first flange frame is a first bottom frame part; the first sealing frame is arranged on the first flange frame, the part of the first sealing frame arranged on the first bottom frame part is a sealing bottom frame part, and the sealing bottom frame part is provided with a through hole extending along the vertical direction; the oil guide pipe is arranged in the through hole in a penetrating mode, and the outer wall of the oil guide pipe is connected with the inner wall of the through hole in a sealing mode. The vacuum drying tank can discharge the liquid kerosene deposited to the bottom sealing frame in time, improves the drying efficiency, improves the utilization rate of the kerosene and greatly reduces the energy consumption.

Description

Vacuum drying tank

Technical Field

The utility model relates to the technical field of vacuum equipment, in particular to a vacuum drying tank.

Background

The vacuum drying tank can dry the workpiece by using a kerosene gas phase principle. Specifically, a workpiece is placed in a drying tank, vacuum pumping is carried out, the drying tank is heated, kerosene is evaporated into kerosene steam, the kerosene steam is fully contacted with the workpiece, heat exchange is carried out, moisture in the workpiece is evaporated into water vapor, the kerosene steam is condensed to become liquid kerosene, and the liquid kerosene is recovered by a condensing device.

The opening of the tank body and the periphery of the tank door of the existing vacuum drying tank are provided with flange frames so as to facilitate the butt joint of the tank body and the tank door. The sealing strip is attached to the flange frames, but after the tank door is closed, the sealing strip is clamped between the two flange frames, and the width of the sealing strip is smaller than that of each frame edge of the flange frames, so that a gap can be formed between the two flange frames. After a large amount of liquid kerosene is formed, part of the liquid kerosene flows into the gap, which affects the normal operation of the drying process and reduces the drying efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a vacuum drying tank, which can discharge liquid kerosene flowing into a gap between a tank body and a tank door in time, ensure the normal operation of a drying process, and improve the drying efficiency.

In order to achieve the above object, there is provided according to the present invention a vacuum drying can, comprising: jar body, first flange frame, first sealed frame and oil pipe lead. Wherein the tank body is provided with an opening; the first flange frame is arranged on the end face of the opening in a sealing mode, and the part, arranged on the end face of the bottom of the opening, of the first flange frame is a first bottom frame part; the first sealing frame is arranged on the first flange frame, the part of the first sealing frame, which is arranged on the first bottom frame part, is a sealing bottom frame part, and the sealing bottom frame part is provided with a through hole extending along the vertical direction; the oil guide pipe penetrates through the through hole, and the outer wall of the oil guide pipe is connected with the inner wall of the through hole in a sealing mode.

In an exemplary embodiment of the utility model, a top end of the oil conduit is lower than or flush with a top surface of the sealing bottom frame portion, and a bottom end of the oil conduit extends downward out of the through hole.

In an exemplary embodiment of the present invention, the vacuum drying can further comprises: and the valve is connected with the oil guide pipe and used for controlling the opening and closing of the oil guide pipe.

In an exemplary embodiment of the utility model, the valve is an automatic valve.

In an exemplary embodiment of the present invention, the number of the through holes is multiple, the number of the oil conduit is the same as the number of the through holes, and the oil conduit corresponds to the through holes one by one.

In an exemplary embodiment of the utility model, the number of the valves is multiple, and the automatic valves are connected with the oil guide pipes in a one-to-one correspondence manner.

In an exemplary embodiment of the present invention, the first sealing frame includes: the connecting plate is attached to the first flange frame in a sealing mode, and the through hole is formed in the connecting plate; and the sealing structure is arranged on the connecting plate in a sealing manner and comprises a sealing ring.

In an exemplary embodiment of the utility model, the sealing structure further includes a plurality of sealing plates, the sealing plates are disposed on the connecting plate, the sealing plates are disposed in parallel and at intervals, and the sealing ring is disposed between adjacent sealing plates.

In an exemplary embodiment of the present invention, the vacuum drying can further comprises: a tank door; the second sealing frame is arranged on the periphery of the tank door, and when the tank door is closed, the second sealing frame is in sealing butt joint with the first sealing frame.

In an exemplary embodiment of the present invention, the vacuum drying can further comprises: and the oil discharge pipeline is arranged at the bottom of the vacuum drying tank and communicated with the oil guide pipe.

According to the technical scheme, the utility model has at least one of the following advantages and positive effects:

according to the vacuum drying tank disclosed by the embodiment of the utility model, the through hole is formed in the sealing bottom frame part of the first sealing frame, and the oil guide pipe is arranged in the through hole, so that the liquid kerosene deposited to the sealing bottom frame part can be discharged in time, the normal operation of a drying process is ensured, the drying efficiency is improved, the utilization rate of the kerosene is improved, and the energy consumption is greatly reduced.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

FIG. 1 is a schematic view of the butt joint of the bottom of a tank body flange and the bottom of a tank door flange of a vacuum drying tank in the prior art;

FIG. 2 is a schematic view of a vacuum drying canister according to an exemplary embodiment;

FIG. 3 is an enlarged view taken at A in FIG. 1 (the tank and the tank door are in an unsealed abutting state);

FIG. 4 is a schematic illustration of the assembly of the first seal frame and the oil conduit according to an exemplary embodiment;

FIG. 5 is a cross-sectional view of an oil conduit disposed in a through-hole, according to an exemplary embodiment;

FIG. 6 is a partial schematic view of a vacuum drying canister according to an exemplary embodiment.

Description of reference numerals:

the prior art is as follows:

1', a tank body flange; 2', a tank door flange; 3', a sealing strip; 4', a bottom plate; g. a gap;

the utility model comprises the following steps:

100. a tank body; 200. a tank door; 1. a first flange frame; 11. a first bottom frame portion; 2. a first seal frame; 21. a sealing bottom frame portion; 201. a connecting plate; 202. a sealing structure; 2021. a seal ring; 2022. a sealing plate; 22. a through hole; 3. an oil guide pipe; 4. a valve; 5. a second seal frame; 6. an oil discharge pipeline; 7. a base plate; 8. a second flange frame; y, vertical direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

In the following description of various exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the utility model may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the utility model, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the utility model.

Although relative terms such as "upper" and "lower" are used in this specification to describe one component of an icon relative to another component, these terms are used in this specification for convenience only. If the device of the icon is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure. The terms "a", "an", "the" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

The embodiment of the utility model discloses a vacuum drying tank, which relates to the drying of a workpiece by utilizing a kerosene gas phase principle. The principle of kerosene vapor phase drying is as follows: under vacuum state, to kerosene heating evaporation, make it turn into the kerosene steam of high temperature, kerosene steam meets the lower work piece of temperature and condenses and emit the latent heat of condensation (about 306.6kJ/kg) in the vacuum drying jar to the work piece heating, the kerosene of condensation turns into liquid and is collected, carry the evaporimeter again through kerosene conveying system, the evaporation of heating once more, so circulate many times, make the work piece temperature rise continuously, moisture in the work piece also constantly evaporates into steam, is taken away by vacuum system, finally reach thorough dry purpose.

The drying process comprises the following specific steps:

1. a preparation stage: and (3) placing the workpiece in a vacuum drying tank, vacuumizing to reduce the pressure to below 700Pa, heating and insulating the tank body of the vacuum drying tank, preheating kerosene by an evaporator to gradually increase the temperature of a kerosene steam outlet of the evaporator to 130 ℃, converting the kerosene from a liquid state into a gas state, diffusing the kerosene in the vacuum drying tank, and further performing heat exchange with the workpiece.

2. A heating stage: at the moment, the vacuum system only needs one pump to maintain the vacuum degree of the vacuum drying tank and the condensation collecting tank at the vacuum degree specified by the process, kerosene steam exchanges heat with the workpiece, flows to the buffer tank after condensation, and then returns to the evaporator to form a cycle. And (3) with the continuous rise of the temperature, the pressure in the vacuum drying tank is gradually raised by the kerosene steam and the water vapor evaporated in the workpiece, and at the moment, the mixed gas is pumped into a condensation recovery system by a pump for condensation and separation. And (4) inputting the condensed and separated kerosene liquid into an evaporator, and continuing the process until the temperature of the workpiece meets the process requirement, and then entering a pressure reduction stage.

3. A pressure reduction stage: and stopping delivering the kerosene into the evaporator, continuously pumping out the mixed gas in the vacuum drying tank, and re-evaporating the kerosene remained in the workpiece so as to condense and recover the kerosene. The pressure reduction stage and the heating stage can be alternately performed for several times according to different performances of the workpiece, so that the drying effect is optimal.

4. A high vacuum stage: and starting the main vacuum system to vacuumize the vacuum drying tank. The final pressure reaches 10Pa or less. When the temperature of the workpiece reaches the specified temperature and the water yield of the workpiece reaches less than 10g per hour per ton of workpiece material, the drying process is finished.

In the heating stage described above, a large amount of liquid kerosene is present in the vacuum drying tank. In the vacuum drying tank in the prior art, as shown in fig. 1, a gap g is formed between a tank body flange 1 'and a tank door flange 2' due to existence of a sealing strip 3 'between a tank body and a tank door of the vacuum drying tank, liquid kerosene flows downwards after being condensed, and easily flows into the gap g along the tank door and a bottom plate 4' of the tank body, so that the oil accumulation phenomenon occurs. The deposited kerosene always exists in the gap g, and the required vacuum degree reaching the end point in the high vacuum stage can be ensured only by completely evaporating the kerosene accumulated in the gap g, so that the vacuumizing time can be prolonged, the working time of the pressure reduction stage and the high vacuum stage is seriously influenced, the production efficiency is reduced, and the energy consumption is greatly increased.

An embodiment of the present invention provides a vacuum drying tank, and referring to fig. 2 to 6, wherein fig. 2 shows an overall schematic view of the vacuum drying tank and a partial cross section of a joint of a tank body 100 and a tank door bottom. Fig. 3 shows an enlarged view at a in fig. 2, and the can body and the can door in fig. 3 are in an unsealed abutting state in order to more clearly show the assembling relationship among the respective components. Fig. 4 shows a schematic view of the assembly of the first sealing frame 2 with the oil conduit 3; fig. 5 shows a schematic cross-sectional view of the oil conduit 3 provided in the through-hole 22, and fig. 6 shows another partial schematic view of the vacuum drying tank. As shown in the drawings, the vacuum drying canister of the embodiment of the present invention includes: the oil pipe comprises a tank body 100, a first flange frame 1, a first sealing frame 2 and an oil guide pipe 3. In which the can 100 has an opening. The first flange frame 1 is hermetically disposed on the end surface of the opening, and a portion of the first flange frame 1 disposed on the end surface of the bottom of the opening is a first bottom frame portion 11. The first sealing frame 2 is arranged on the first flange frame 1, the part of the first sealing frame 2 arranged on the first bottom frame part 11 is a sealing bottom frame part 21, and the sealing bottom frame part 21 is provided with a through hole 22 extending along the vertical direction Y. The oil conduit 3 is arranged in the through hole 22 in a penetrating way, and the outer wall of the oil conduit 3 is connected with the inner wall of the through hole 22 in a sealing way.

According to the vacuum drying tank provided by the embodiment of the utility model, the through hole 22 is formed in the sealing bottom frame part 21 of the first sealing frame 2, and the oil guide pipe 3 is arranged in the through hole 22, so that liquid kerosene deposited to the sealing bottom frame part 21 can be discharged in time, the normal operation of a drying process is ensured, the drying efficiency is improved, the utilization rate of the kerosene is improved, and the energy consumption is greatly reduced.

The vacuum drying cylinder of the embodiment of the present invention will be described in detail below.

It should be noted that "up", "down" and "vertical direction" in the embodiments of the present invention are terms used to indicate orientation, for example, the vacuum drying tank of the embodiments of the present invention is installed on the ground, and the direction away from the ground is upward, and the opposite direction is downward. The vertical direction Y is a direction perpendicular to the ground. The technical terms are only used for clearly describing the relative position relationship between the components and have no limiting meaning.

Further, as shown in fig. 2 to 3, the vacuum drying can further includes: a tank door 200 and a second sealing frame 5. The second sealing frame 5 is arranged on the periphery of the tank door 200, and when the tank door 200 is closed, the second sealing frame 5 is in sealing butt joint with the first sealing frame 2.

Further, as shown in fig. 2, the vacuum drying cylinder further includes a second flange frame 8, which is hermetically disposed on the periphery of the cylinder door 200, and a second sealing frame 5 is hermetically disposed on the second flange frame 8, so as to facilitate the hermetic butt joint of the cylinder body 100 and the cylinder door 200.

Further, as shown in fig. 3, the vacuum drying cylinder further includes a bottom plate 7 for carrying the workpiece. The bottom plate 7 extends onto the first bottom frame portion 11.

Further, as shown in fig. 5, the top end of the oil conduit 3 is lower than the top surface of the sealing bottom frame portion 21 or flush with the top surface of the sealing bottom frame portion 21, and the bottom end of the oil conduit 3 extends downward to form a through hole 22.

Specifically, as shown in fig. 3, the size of the sealing bottom frame portion 21 in the vertical direction Y is smaller than the size of the first bottom frame portion 11 of the first flange frame 1 in the vertical direction Y, the first bottom frame portion 11, the sealing bottom frame portion 21 and the tank door 200 form a groove, i.e., the sealing bottom frame portion 21 constitutes a groove bottom of the groove, and the bottom plate 7 of the tank body 100 extends onto the first bottom frame portion 11, i.e., the bottom plate 7 is located above the first bottom frame portion 11, so condensed kerosene easily flows into the groove with the bottom plate 7 downward, and at the same time, kerosene may also be deposited into the groove with the tank door 200 downward. In order to facilitate the discharge of kerosene from the groove, the top end of the oil conduit 3 cannot be higher than the top surface of the sealing bottom frame 21, i.e. the bottom surface of the groove, so that the kerosene in the groove can completely flow into the oil conduit 3 and be discharged.

Further, as shown in fig. 6, the vacuum drying tank of the embodiment of the present invention further includes a valve 4 connected to the oil conduit 3 for controlling the opening and closing of the oil conduit 3. When oil needs to be drained, the valve 4 is opened, namely the oil guide pipe 3 is opened, and the kerosene is drained through the oil guide pipe 3.

Further, the valve 4 is an automatic valve. That is, the valve 4 may be controlled by a controller, and the controller may control the valve 4 to be automatically opened or closed when the drying process is performed to a certain stage. For example, in the preparation stage and the high vacuum stage of the drying process, the vacuum drying tank is vacuumized, and since the oil conduit 3 is connected with an external pipeline (such as a buffer tank), in order to avoid the influence of the oil conduit 3 on the vacuumization, the automatic valve is controlled to be closed in the two stages. In the heating stage, in order to accelerate the liquid kerosene to flow back to the buffer tank, the automatic valve is set to be opened, and then the oil guide pipe 3 is opened, so that the kerosene deposited in the gap or the groove is discharged through the oil guide pipe 3, thus realizing the staged opening and closing of the oil guide pipe 3, further shortening the working time of the pressure reduction stage and improving the utilization rate of the kerosene.

The above-mentioned control of the opening and closing of the automatic valve by the controller is realized by those skilled in the art according to the common general knowledge, and will not be described herein in detail with respect to the specific principle thereof.

Of course, in another embodiment, the valve 4 may also be a manual valve, and the opening and closing of the valve need to be manually controlled, and a person skilled in the art may set the valve according to actual requirements, and the valve is not limited herein.

Further, the number of the through holes 22 is multiple, the number of the oil guide pipes 3 is the same as that of the through holes 22, and the oil guide pipes 3 correspond to the through holes 22 one by one. The plurality of through holes 22 are arranged at equal intervals. The number of the through holes 22 may be 2, 3, 4, 5 or more, and those skilled in the art may set the number according to the size of the actual can body 100, and is not limited herein. The provision of a plurality of through holes 22 can accelerate the discharge of kerosene.

Furthermore, the number of the valves 4 is multiple, and the valves 4 are connected with the oil guide pipes 3 in a one-to-one correspondence manner. In this embodiment, the valves 4 correspond to the oil conduits 3 one by one, and each oil conduit 3 is controlled by one valve 4. Thus, it is possible to determine which of the oil pipes 3 are opened according to the amount of kerosene deposited.

Further, in order to ensure the sealing performance of the drying cylinder, the oil conduit 3 of the embodiment of the utility model is matched with the through hole 22, and after the first sealing frame 2 is manufactured, the oil conduit 3 is inserted into the through hole 22 for full-welding connection.

Further, as shown in fig. 3, the first sealing frame 2 includes: a connection plate 201 and a sealing structure 202. Wherein, the connecting plate 201 is hermetically attached to the first flange frame 1, and the through hole 22 is opened in the connecting plate 201. The connecting plate 201 can be attached to the first flange frame 1 by welding or bonding, so as to ensure the sealing performance of the two. The sealing structure 202 is hermetically disposed on the connecting plate 201, and the sealing structure 202 may be a sealing ring 2021. By the sealing structure 202, the tank body 100 of the drying tank is in sealing butt joint with the tank door 200.

As shown in fig. 3, the sealing structure 202 may further include a plurality of sealing plates 2022, the plurality of sealing plates 2022 are provided on the connection plate 201, the plurality of sealing plates 2022 are provided in parallel and at intervals, and the sealing ring 2021 is provided between the adjacent sealing plates 2022. By providing a plurality of spaced seal plates 2022, the strength of the seal structure 202 can be increased, and by providing the seal ring 2021 between the spaced seal plates 2022, the seal ring 2021 can be positioned and fixed, thereby enhancing the stability of the entire seal structure 202.

Further, the vacuum drying tank of the embodiment of the utility model further comprises an oil discharge pipeline 6 which is arranged at the bottom of the vacuum drying tank, and the oil discharge pipeline 6 is communicated with the oil guide pipe 3.

The oil discharge pipeline 6 is connected with an external buffer tank to lead liquid into the buffer tank, then into a condensing tank, and into an evaporator through a condensing pipe, so that the liquid is evaporated again to dry the workpiece, and the liquid is involved in the recycling process of kerosene, thereby improving the utilization rate of the kerosene and avoiding waste.

In summary, in the vacuum drying canister according to the embodiment of the present invention, the through hole 22 is formed in the sealing bottom frame portion 21 of the first sealing frame 2, and the oil conduit 3 is disposed in the through hole 22, so that the liquid kerosene deposited on the sealing bottom frame portion 21 can be rapidly discharged in the heating stage, the normal operation of the drying process is ensured, the working time in the pressure reduction and high vacuum stages is shortened, the drying efficiency is improved, the energy consumption is greatly reduced, and the stored kerosene can be recycled to improve the utilization rate of the kerosene.

It is to be understood that the utility model is not limited in its application to the details of construction and the arrangement of components set forth in the description. The utility model is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the utility model disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute alternative aspects of the present invention. The embodiments of this specification illustrate the best mode known for carrying out the utility model and will enable those skilled in the art to utilize the utility model.

Claims (10)

1. A vacuum drying canister, comprising:

a can (100) having an opening;

the first flange frame (1) is arranged on the end face of the opening in a sealing mode, and the part, arranged on the end face of the bottom of the opening, of the first flange frame (1) is a first bottom frame part (11);

the first sealing frame (2) is arranged on the first flange frame (1), the part, arranged on the first bottom frame part (11), of the first sealing frame (2) is a sealing bottom frame part (21), and the sealing bottom frame part (21) is provided with a through hole (22) extending along the vertical direction (Y);

and the oil guide pipe (3) is arranged in the through hole (22) in a penetrating manner, and the outer wall of the oil guide pipe (3) is hermetically connected with the inner wall of the through hole (22).

2. The vacuum drying pot according to claim 1, characterized in that the top end of the oil conduit (3) is lower than the top surface of the sealing bottom frame portion (21) or flush with the top surface of the sealing bottom frame portion (21), and the bottom end of the oil conduit (3) extends downwards out of the through hole (22).

3. The vacuum drying canister of claim 1, further comprising:

and the valve (4) is connected with the oil guide pipe (3) and is used for controlling the opening and closing of the oil guide pipe (3).

4. Vacuum drying cylinder according to claim 3, characterized in that the valve (4) is an automatic valve.

5. The vacuum drying cylinder according to claim 4, characterized in that the number of the through holes (22) is multiple, the number of the oil guide pipes (3) is the same as the number of the through holes (22), and the oil guide pipes (3) correspond to the through holes (22) one by one.

6. The vacuum drying cylinder according to claim 5, characterized in that the number of the valves (4) is multiple, and the automatic valves are connected with the oil guide pipes (3) in a one-to-one correspondence.

7. The vacuum drying canister according to claim 1, characterized in that the first sealing frame (2) comprises:

the connecting plate (201) is attached to the first flange frame (1) in a sealing mode, and the through hole (22) is formed in the connecting plate (201);

and the sealing structure (202) is arranged on the connecting plate (201) in a sealing mode, and the sealing structure (202) comprises a sealing ring (2021).

8. The vacuum drying canister according to claim 7, wherein the sealing structure (202) further comprises a plurality of sealing plates (2022), the plurality of sealing plates (2022) being provided on the connecting plate (201), the plurality of sealing plates (2022) being arranged in parallel and spaced apart, the sealing ring (2021) being provided between adjacent sealing plates (2022).

9. The vacuum drying canister of claim 1, further comprising:

a tank door (200);

and the second sealing frame (5) is arranged on the periphery of the tank door (200), and when the tank door (200) is closed, the second sealing frame (5) is in sealing butt joint with the first sealing frame (2).

10. The vacuum drying canister of claim 1, further comprising: and the oil discharge pipeline (6) is arranged at the bottom of the vacuum drying tank, and the oil discharge pipeline (6) is communicated with the oil guide pipe (3).

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