CN220083458U

CN220083458U - Rotary vacuum drying equipment

Info

Publication number: CN220083458U
Application number: CN202321651895.6U
Authority: CN
Inventors: 顾棋; 江红琴
Original assignee: Changzhou Baocheng Drying Equipment Co ltd
Current assignee: Changzhou Baocheng Drying Equipment Co ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2023-11-24
Anticipated expiration: 2033-06-27

Abstract

The utility model discloses rotary vacuum drying equipment, which comprises: the rotary drum and a pair of hollow rotating shafts are connected with the rotary drum and used for driving the rotary drum to do rotary motion; the rotary cylinder comprises a rotary liner and a heating cavity arranged at the outer side of the rotary liner; wherein a plurality of filter screen plate components are arranged on the outer side wall of the rotary liner at intervals; each filter screen plate assembly comprises a hollowed-out opening integrally formed on the side wall of the rotary inner container, a filter screen welded on the side wall of the rotary inner container to cover the hollowed-out opening, and a bulge-shaped filter screen housing welded on the outer side wall of the rotary inner container and suitable for covering the filter screen; the filter screen housings of the plurality of filter screen plate assemblies are communicated through a coil pipe; and a main connecting pipe for connecting the coil pipe is arranged in one hollow rotating shaft, and an air pipe for communicating the heating cavity is arranged in the other hollow rotating shaft.

Description

Rotary vacuum drying equipment

Technical Field

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

Background

The drying device is a mechanical device for reducing the moisture of materials by using heat energy, and is used for drying the objects, and the drying device is used for evaporating and escaping moisture (generally referred to as moisture or other volatile liquid components) in the materials by heating so as to obtain solid materials with specified moisture content, wherein the purpose of drying is for the use of the materials or the requirement of further processing.

The rotary vacuum drying equipment is a structure in the drying equipment, and in the use process of the rotary vacuum drying equipment, a heat source is generally adopted to dry materials in the rotary vacuum drying equipment, heat is conducted to the horizontal drying liner through the side wall of the rotary vacuum drying equipment, and then water vapor generated in the material drying process of the rotary vacuum drying equipment is sucked and recovered through the vacuum tube. In the prior art, a vacuum pipeline generally applied to rotary vacuum drying equipment directly penetrates through the side wall of a drying liner of the rotary vacuum drying equipment to partially extend into a drying inner cavity of the rotary vacuum drying equipment, and the sealing performance between the vacuum pipeline and the drying liner under the condition is high, so that the production precision requirement on the equipment is also high. Furthermore, for the vacuum pipe suction head which extends into the drying liner, although the suction and recovery of the water vapor volatilized from the dried material can be realized jointly by arranging, for example, three vacuum pipe suction heads, the arranging quantity of the vacuum pipe suction heads is not large in general, because the space of the drying liner is mainly used for drying the material, and therefore, the arranging quantity of the vacuum pipe suction heads is limited in general; in addition, the position of the vacuum tube suction head in the drying inner container is relatively limited, so that the suction operation of water vapor is difficult to uniformly suck in different areas in the drying inner container; under the condition, the suction and recovery efficiency of the water vapor of the whole rotary vacuum drying equipment is low and unbalanced. For example, the novel high-efficiency double-cone rotary vacuum dryer disclosed in publication No. CN212778353U and the double-cone rotary vacuum dryer disclosed in publication No. CN213238154U all have the above problems.

In addition, considering that some materials need to be washed before being dried, the equipment which can only singly execute drying has single function and small adaptability to different materials, so that different drying equipment needs to be configured according to the processing requirements of different materials, the equipment cost is increased, and the management and maintenance of workshop equipment are inconvenient. Therefore, the drying equipment convenient for washing the materials is adopted, so that the applicability of drying processing of different materials can be improved.

Disclosure of Invention

The utility model aims to provide rotary vacuum drying equipment so as to solve the technical problem of drying and washing operations of materials.

The rotary vacuum drying equipment of the utility model is realized by the following steps:

a rotary vacuum drying apparatus comprising: the rotary drum and a pair of hollow rotating shafts are connected with the rotary drum and used for driving the rotary drum to do rotary motion; wherein the method comprises the steps of

The rotary cylinder comprises a rotary liner and a heating cavity arranged at the outer side of the rotary liner; wherein the method comprises the steps of

A plurality of filter screen plate assemblies are arranged on the outer side wall of the rotary liner at intervals;

each filter screen plate assembly comprises a hollowed-out opening integrally formed on the side wall of the rotary inner container, a filter screen welded on the side wall of the rotary inner container to cover the hollowed-out opening, and a bulge-shaped filter screen housing welded on the outer side wall of the rotary inner container and suitable for covering the filter screen; the filter screen housings of the plurality of filter screen plate assemblies are communicated through a coil pipe; and

one hollow rotating shaft is provided with a general connecting pipe for connecting the coil pipe, and the other hollow rotating shaft is provided with an air pipe for communicating the heating cavity.

In an alternative embodiment of the present utility model, the rotary cylinder includes a cylindrical body connected in a penetrating manner, an upper cone disposed at the top of the cylindrical body, and a lower cone disposed at the bottom of the cylindrical body; wherein the method comprises the steps of

The plurality of filter screen plate components are distributed on the outer side wall of the rotary liner corresponding to the cylindrical body, the upper cone body and the lower cone body at intervals along the circumferential direction.

In an alternative embodiment of the present utility model, the coil includes a first coil for communicating with a plurality of filter housings on an outer sidewall of the rotary liner corresponding to the cylindrical body, a second coil for communicating with a plurality of filter housings on an outer sidewall of the rotary liner corresponding to the upper cone, and a third coil for communicating with a plurality of filter housings on an outer sidewall of the rotary liner corresponding to the lower cone.

In an alternative embodiment of the utility model, a reflux cavity is further arranged on the rotary cylinder and positioned outside the heating cavity, and the heating cavity is communicated with the reflux cavity through a pore canal.

In an alternative embodiment of the utility model, the rotary drums are respectively and hermetically connected with a pair of hollow rotating shafts through a sealing sleeve; and

the air pipe and the total connecting pipe extend into corresponding sealing sleeves respectively;

a plurality of vent holes communicated with the heating cavity are formed in the side walls of the sealing sleeves of the pair of sealing sleeves, wherein the side walls of the sealing sleeves are connected with the air pipes;

the side walls of the sealing sleeves connected with the general connecting pipe in the pair of sealing sleeves are provided with perforations correspondingly suitable for the first coil pipe, the second coil pipe and the third coil pipe; the first coil pipe, the second coil pipe and the third coil pipe are communicated with the total connecting pipe after penetrating through the side wall of the sealing sleeve.

In an alternative embodiment of the utility model, one end of the air pipe far away from the heating cavity is connected with a second rotary joint;

the second rotary joint is in rotary sealing connection with the hollow rotary shaft of the air fitting pipe;

the air pipe thread is sleeved in the central cavity of the second rotary joint; and

and a backflow medium channel communicated with the backflow cavity is arranged between the air pipe and the second rotary joint and between the air pipe and the corresponding hollow rotary shaft, a heat medium inlet and a backflow medium outlet are arranged in the second rotary joint, the heat medium inlet is communicated with the air pipe, and the backflow medium outlet is communicated with the backflow medium channel.

In an alternative embodiment of the utility model, one end of the total connection pipe far away from the coil pipe is connected with the transition pipe through a first rotary joint; and

the transition pipe is connected with the vacuum pump through a first branch pipe;

the transition pipe is also connected with the water suction pump through a second branch pipe.

In an alternative embodiment of the present utility model, the transition pipe is further connected to a gas storage bag through a third branch pipe, and a pulse electromagnetic valve is further disposed between the gas storage bag and the third branch pipe.

In an alternative embodiment of the present utility model, a pair of the hollow rotating shafts are respectively connected with a power assembly for driving the hollow rotating shafts to make a rotating motion; and

the pair of hollow rotating shafts are respectively assembled on a supporting seat through bearings.

In an alternative embodiment of the utility model, the outer side of the rotary cylinder is also covered with a heat-insulating cover.

By adopting the technical scheme, the utility model has the following beneficial effects: the rotary vacuum drying equipment provided by the utility model adopts the filter screen plate assembly which comprises a hollowed-out opening integrally formed on the side wall of the rotary inner container, a filter screen welded on the side wall of the horizontal drying inner container to cover the hollowed-out opening, and a bulge-shaped filter screen housing welded on the outer side wall of the horizontal drying inner container and suitable for covering the filter screen. The design of this structure can be convenient for wash the material in the gyration inner bag for wash water can in time discharge through the filter screen plate subassembly.

Moreover, the filter screen is directly arranged on the side wall of the rotary inner container, so that the filter screen can be directly contacted with materials in the rotary inner container, and the filter efficiency of the materials in the whole rotary inner container is greatly improved when the filter screen plate assemblies are matched with the filter screen plate assemblies compared with the condition that a single filter port is adopted in the traditional technology. And a plurality of filter screen plate components can be uniformly distributed on the side wall of the rotary liner, so that the balance of the operation that water vapor formed in the material drying process is extracted can be improved.

Drawings

Fig. 1 is a schematic view showing the overall structure of a rotary vacuum drying apparatus of the present utility model;

FIG. 2 is a schematic view showing a partial structure of a rotary vacuum drying apparatus according to the present utility model;

FIG. 3 is a schematic diagram showing a partial structure of a rotary vacuum drying apparatus according to the present utility model;

fig. 4 is a schematic view showing a partial structure of the rotary vacuum drying apparatus of the present utility model.

In the figure: the rotary liner 1, the heating cavity 2, the reflux cavity 3, the hollow rotating shaft 4, the heat preservation housing 5, the cylindrical body 61, the upper cone 62, the lower cone 63, the hollowed-out opening 71, the filter screen 72, the filter screen housing 73, the first coil 81, the second coil 82, the third coil 83, the air pipe 9, the sealing sleeve 10, the total connection pipe 11, the second rotary joint 12, the heat medium inlet pipe 13, the reflux pipe 14, the first rotary joint 15, the transition pipe 16, the first branch pipe 17, the vacuum pump 18, the second branch pipe 19 and the water suction pump 20.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Referring to fig. 1 to 4, the present embodiment provides a rotary vacuum drying apparatus, including: a rotary drum and a pair of hollow rotating shafts 4 connected with the rotary drum and used for driving the rotary drum to rotate. The pair of hollow rotating shafts 4 are respectively connected with a power assembly for driving the hollow rotating shafts to do rotary motion; and a pair of hollow rotating shafts 4 are respectively fitted on a support base through bearings. The power assembly of the embodiment can adopt a structure that a motor is matched with a transmission belt or a transmission chain.

Specifically, first, regarding the rotary drum of the present embodiment:

the rotary cylinder comprises a rotary liner 1, a heating cavity 2 arranged on the outer side of the rotary liner 1, and a backflow cavity 3 positioned on the outer side of the heating cavity 2. The heating cavity 2 is communicated with the backflow cavity 3 through a pore canal. The heating cavity 2 is suitable for being filled with hot air to heat the side wall of the rotary liner 1, so that materials in the rotary liner 1 are heated, and the drying effect of the materials is achieved. The reflux cavity 3 is suitable for the air flow after heat exchange to leave the rotary liner 1, namely, the circulation flow of the hot air flow is realized under the cooperation of the heating cavity 2 and the reflux cavity 3.

In terms of shape, the rotary drum in this embodiment includes a cylindrical body 61 connected therethrough, an upper cone 62 provided at the top of the cylindrical body 61, and a lower cone 63 provided at the bottom of the cylindrical body 61. A pair of hollow rotating shafts 4 are each connected to a cylindrical body 61.

On the basis of the structure, in order to further improve the utilization rate of the whole rotary drum to hot air flow in the material drying process, the outer side of the rotary drum is covered with the heat preservation housing 5.

Secondly, regarding the filter screen plate assembly:

generally, a plurality of filter screen plate assemblies are arranged on the outer side wall of the rotary liner 1 at intervals; the plurality of filter screen plate assemblies are distributed on the outer side wall of the rotary liner 1 corresponding to the cylindrical body 61, the upper cone 62 and the lower cone 63 at intervals along the circumferential direction. In alternative embodiments, the structure of the plurality of screen assemblies in this embodiment is the same, and the structure of the screen assemblies described below is applicable to any one of the screen assemblies.

In more detail, each screen plate assembly comprises a hollowed-out opening 71 integrally formed on the side wall of the rotary liner 1, a screen 72 welded on the side wall of the rotary liner 1 to cover the hollowed-out opening 71, and a screen cover 73 welded on the outer side wall of the rotary liner 1 and suitable for covering the screen 72 in a bulge shape; the screen housings 73 of the plurality of screen assemblies are in communication with one another through a coil. In an alternative embodiment, the screen housing 73 in the present exemplary embodiment extends through the outer wall of the heating chamber 2, so that a part of the screen housing 73 protrudes into the return chamber 3. The shape of the hollowed-out opening 71 may be circular, kidney-shaped or other regular shapes, which is not limited in any way.

In this embodiment, the hollowed-out opening 71 is directly integrally formed on the rotary liner 1, and then the filter screen 72 is directly welded on the edge of the hollowed-out opening 71, so that the filter screen 72 directly covers the hollowed-out opening 71.

On the basis of the above-described structure, it is also necessary to explain that the coil pipe employed in the present embodiment includes a first coil pipe 81 for communicating the plurality of screen housings 73 on the outer side wall of the rotary liner 1 corresponding to the cylindrical body 61, a second coil pipe 82 for communicating the plurality of screen housings 73 on the outer side wall of the rotary liner 1 corresponding to the upper cone 62, and a third coil pipe 83 for communicating the plurality of screen housings 73 on the outer side wall of the rotary liner 1 corresponding to the lower cone 63.

Still next, a pair of hollow rotating shafts 4 of the present embodiment:

first, one hollow rotating shaft 4 is provided therein with a total connection pipe 11 for connecting the first coil 81, the second coil 82, and the third coil 83, and the other hollow rotating shaft 4 is provided therein with an air pipe 9 for communicating with the heating chamber 2.

The rotary drums are respectively connected with a pair of hollow rotating shafts 4 in a sealing way through a sealing sleeve 10; and the air tube 9 and the total adapter tube 11 extend into the respective sealing sleeve 10. A plurality of vent holes communicated with the heating cavity 2 are arranged on the side walls of the sealing sleeves 10 connected with the air pipes 9 in the pair of sealing sleeves 10. The side walls of the sealing sleeves 10 connected with the general connecting pipe 11 in the pair of sealing sleeves 10 are provided with perforations which are correspondingly suitable for the first coil 81, the second coil 82 and the third coil 83; the first coil 81, the second coil 82 and the third coil 83 are communicated with the total joint pipe 11 after penetrating through the side wall of the sealing sleeve 10. The present embodiment achieves series connection of a plurality of screen assemblies by the first, second and third coils 81, 82 and 83 and the overall adapter tube 11 such that the plurality of screen assemblies form an integral passageway.

On the basis of the above-described construction, it is also necessary to state that the end of the air pipe 9 remote from the heating chamber 2 is connected with a second swivel joint 12; the second rotary joint 12 is in rotary sealing connection with the hollow rotary shaft 4 of the matched air pipe 9;

the air pipe 9 is sleeved in the central cavity of the second rotary joint 12 in a threaded manner; and a backflow medium channel communicated with the backflow cavity 3 is arranged between the air pipe 9 and the second rotary joint 12 and between the air pipe 9 and the corresponding hollow rotary shaft 4, a heat medium inlet and a backflow medium outlet are arranged in the second rotary joint 12, the heat medium inlet is communicated with the air pipe 9, and the backflow medium outlet is communicated with the backflow medium channel. The heat medium inlet is connected with a heat medium inlet pipe 13, and the reflux medium outlet is connected with a reflux pipe 14. The heat medium inlet pipe 13 is used for introducing a heat medium for drying, such as hot water, hot oil or steam. The return pipe 14 is used for return after heat exchange of the heat medium.

In addition, the present embodiment also makes the following design:

one end of the total connecting pipe 11 far away from the coil pipe is connected with a transition pipe 16 through a first rotary joint 15; and the transition pipe 16 is connected with a vacuum pump 18 through a first branch pipe 17; the transition pipe 16 is also connected to a suction pump 20 via a second branch pipe 19.

When the transition pipe 16 is communicated with the vacuum pump 18, on one hand, the material with higher water content can be subjected to suction filtration treatment through the vacuum pump 18 at the initial drying stage of the material in the rotary liner 1, so that part of water in the material is removed, the drying time of the whole material is shortened, and the drying efficiency of the material is improved. On the other hand, during the drying process of the material, the water evaporated from the material may pass through the filter screen 72 and the filter screen cover 73 in sequence and then be finally pumped by the vacuum pump 18.

When the transition pipe 16 is communicated with the water pump 20, the water pump can be used for cleaning materials to be cleaned on one hand, so that the water after the materials are cleaned can pass through the filtering and filtering screen housing 73 in sequence and then finally be pumped out of the water pump 20. That is, the rotary vacuum drying apparatus of this embodiment not only can realize filtering and drying of materials, but also can meet the use requirement of cleaning, and for cleaning operation, only the transition pipe 16 is connected with the vacuum pump 18 through the first branch pipe 17 and the suction pump 20 through the second branch pipe 19, and a complete set of structure for cleaning materials is not required to be designed on the rotary vacuum drying apparatus. Therefore, the embodiment can realize various requirements of material processing by a simplified structure, and therefore, the production and use cost of the whole equipment is low.

Finally, it is also necessary to say that the transition pipe 16 of the present embodiment is also connected to a gas storage bag 22 via a third branch pipe 21, and that a pulse solenoid valve 23 is also provided between the gas storage bag 22 and the third branch pipe 21. The pulse electromagnetic valve 23 of the present embodiment causes compressed air to be injected into the transition pipe 16 at intervals in the third branch pipe 21, so that the compressed air is injected into the coil pipe and the filter screen cover 73 through the transition pipe 16, and the material adhered to the filter screen 72 can be blown down into the rotary liner 1. The time between each pulse (typically 5-10 seconds) and the magnitude of the blowing pressure (typically 0.3-0.5 MPa) may be determined based on factors such as the magnitude of the vacuum suction pressure, the magnitude of the third leg, etc., so as to purge the material adhering to the screen 72 from the screen 72.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, and are more fully described herein with reference to the accompanying drawings, in which the principles of the present utility model are shown and described, and in which the general principles of the utility model are defined by the appended claims.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present utility model, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.

Claims

1. A rotary vacuum drying apparatus, comprising: the rotary drum and a pair of hollow rotating shafts are connected with the rotary drum and used for driving the rotary drum to do rotary motion; wherein the method comprises the steps of

2. The rotary vacuum drying apparatus according to claim 1, wherein the rotary drum comprises a cylindrical body connected through, an upper cone provided at the top of the cylindrical body, and a lower cone provided at the bottom of the cylindrical body; wherein the method comprises the steps of

3. The rotary vacuum drying apparatus of claim 2, wherein the coil comprises a first coil for communicating with a plurality of filter housings on an outer sidewall of the rotary liner corresponding to the cylindrical body, a second coil for communicating with a plurality of filter housings on an outer sidewall of the rotary liner corresponding to the upper cone, and a third coil for communicating with a plurality of filter housings on an outer sidewall of the rotary liner corresponding to the lower cone.

4. A rotary vacuum drying apparatus according to claim 3, wherein a return chamber is further provided on the rotary drum outside the heating chamber, the heating chamber being in communication with the return chamber via a duct.

5. The rotary vacuum drying apparatus according to claim 4, wherein the rotary drums are hermetically connected to a pair of hollow rotary shafts through a sealing sleeve, respectively; and

6. The rotary vacuum drying apparatus according to claim 5, wherein the end of the air pipe away from the heating chamber is connected with a second rotary joint;

7. The rotary vacuum drying apparatus according to any one of claims 1 to 6, wherein the end of the total connecting pipe remote from the coil pipe is connected to the transition pipe through a first rotary joint; and

8. The rotary vacuum drying apparatus according to claim 7, wherein the transition pipe is further connected to a gas storage bag through a third branch pipe, and a pulse solenoid valve is further provided between the gas storage bag and the third branch pipe.

9. The rotary vacuum drying apparatus according to any one of claims 1 to 5, wherein a pair of the hollow rotating shafts are respectively connected with a power assembly for driving the hollow rotating shafts to make a rotary motion; and a pair of hollow rotating shafts are respectively assembled on a supporting seat through bearings.

10. The rotary vacuum drying apparatus according to any one of claims 1 to 5, wherein the outside of the rotary drum is further covered with a heat-insulating cover.