JP7137030B1 - drying equipment - Google Patents

Abstract

[Problem] In the part where the heat medium pipe penetrates the casing of the drying device, the parts are damaged due to improper assembly or excessive stress due to the effects of manufacturing errors, assembly errors, and deformation of each part due to temperature changes. , to suppress troubles such as deterioration of airtightness. Kind Code: A1 The present invention relates to a drying apparatus for flowing a heat medium through a drying section (10) installed in a casing (2) for drying an object to be dried. The heat medium containing portion 12 provided in the heat medium containing portion 12, the joint portion 13 provided in communication with the heat medium containing portion, and the heat medium inserted through the through hole 3a and connected to the joint portion of the drying portion to flow the heat medium A heat medium pipe 40 and a heat medium pipe holding portion 64 for holding the heat medium pipe in the casing 2 are provided. A movable portion 80 having sealing means (O-ring 65) capable of displacing the heat medium pipe is provided. [Selection drawing] Fig. 4

Description

TECHNICAL FIELD The present invention relates to a drying apparatus, and more particularly to a drying apparatus used for drying powders and granules such as pharmaceuticals.

As a conventional drying apparatus, for example, in Patent Document 1, a drug waiting to be dried is placed in a rotatable drying cylinder, dried with heat emitted from a heating block, and the drying cylinder intermittently rotates to dry the medicine. Disclosed is a pharmaceutical drying apparatus that flips over to provide uniform drying.
However, there is a method in which the medicine is placed in a rotatable drying cylinder and turned over and dried with heat, or a heat medium is flowed in a jacket installed in the casing, and the inner wall of the casing is used as an electric heating surface to heat or heat the object to be dried. In the cooling method, a device with a larger heat transfer area is conceivable in order to sufficiently dry or cool, but due to the relationship with the installation area, etc., the size of the device cannot be increased without limit. If the drying apparatus has a small heat transfer area, the object to be dried cannot be sufficiently heated, and drying for a long time may be required or insufficient drying may occur.

Therefore, in drying or cooling, in order to further increase the heat transfer area, the heat medium is supplied not only to the casing but also to the interior of the drying section such as the shelf plate and stirring blades installed in the casing. In this case, a method is being considered in which the heating medium pipe is passed through the casing from the outside while ensuring the airtightness of the casing. The drying section here includes a drying plate.
In general, as a joint structure related to piping, in the joint for pipes of Patent Document 2, the butted portion of the joint portion of two pipes is covered with a band and sealed with a seal ring at the joint portion, and the exhaust pipe of Patent Document 3 Conventionally, there has been disclosed an exhaust pipe connection structure in which an engagement member is brought into contact with a seal member in a pipe connection device.
In addition to this, for example, firstly, a method of welding a heat medium pipe penetrated through the casing to the casing, secondly, a method of providing a joint such as a flange in the casing and passing the heat medium pipe through the opening of the casing, There is a method of fixing via a gasket or the like, and a third method is a method of providing an opening in the casing with a sealing part such as an O-ring installed on the end face, and passing the heating medium pipe through the opening of the casing. A fourth method is to provide an opening in the casing, pass the heat medium pipe through the opening of the casing, and then form an expansion joint such as a bellows between the casing and the heat medium pipe.

Japanese Patent No. 6764083 International Publication WO2015/019623 JP 2008-88954 A

However, in the above first to third methods, in order to accurately align the internal structure of the casing, the heat medium pipes, and the drying section through which the heat medium flows, the manufacturing precision and assembly precision of each part are increased. However, there is a problem that the deformation of each part occurs due to the factor of cost increase and the temperature change of each part, and excessive stress is applied to the connection part of the heat medium pipe, which causes leakage and breakage.
In addition, in the above Patent Documents 2 and 3 and the fourth method, the expansion joint has a complicated structure, so the washability is poor, and there is a high risk of contamination that impurities are mixed into the product. In addition, the expansion joint requires a relatively large force for deformation, and a load is applied to the peripheral parts, and there is a risk of damage to the parts. Many of these expansion joints have relatively low flexibility, and depending on the level of manufacturing accuracy and assembly accuracy of each part and the degree of thermal deformation, strong stress may be applied to each part, causing damage. . In addition, expansion joints made of rubber or resin, which have relatively high flexibility, cannot withstand large pressure differences, and cannot be used for drying devices such as vacuum drying where pressure differences occur.
In other words, drying equipment that dries high-value-added products such as pharmaceuticals requires a highly airtight casing to prevent contamination during drying and to maintain drying efficiency. Since frequent and thorough cleaning is required for maintenance, ease of disassembly and simplicity of part shape are required.

Therefore, the present invention has been made in view of the above problems. The purpose is to suppress troubles such as damage to parts due to incorrect assembly, excessive stress, deterioration of airtightness, etc. due to the influence of deformation of each part due to errors, assembly errors, and temperature changes.
Specifically, first, in order to pass the heat medium pipe through the casing in a state where the sealing means in which the O-ring is attached to the seal groove provided on the outer peripheral portion of the heat medium pipe is provided, the manufacturing accuracy of each part and the Since there is no need to improve the assembly accuracy, the cost of equipment can be reduced. Even if parts are deformed due to temperature changes or pressure changes in the casing, the degree of freedom of the connection between the casing and the heat medium pipes absorbs the deformation and prevents damage to each part. Thirdly, since the heat transfer pipes are easy to attach and detach, maintenance such as when disassembling and cleaning the equipment is high. Fifth, since there is no need to install expensive parts such as expansion joints, the cost of equipment can be reduced. Sixth, by limiting the movable range of the heat medium pipes, the risk of the heat medium pipe coming off or leaking can be reduced.

A first invention for achieving the object of the above-mentioned problem is installed in a casing in a vertical direction in a multistage manner, and a drying medium falling from above in the vertical direction is placed on a drying section heated via a heating medium. A drying device for drying,
The drying section is
a drying plate section configured in multiple stages with a gap from the first drying section to the n-th drying section;
a heating medium containing portion on the lower surface of each drying plate portion so that the heat medium supplied from the heating medium supply pipe arranged outside the casing is heat-transferred to the entire area of each drying plate portion;
moreover,
a through hole provided in the casing;
a joint portion provided in communication with the heat medium containing portion;
a heat medium pipe inserted through the through hole and connected to the joint to flow a heat medium;
a heat medium pipe holding portion including a first flange and a second flange that insert the heat medium pipe at the position of the through hole and attach the casing by sandwiching it from the inside and outside,
The heat medium pipe is formed in a single substantially cylindrical shape with the flow path of the heat medium,
The first flange has a pipe sliding contact hole with which the outer peripheral surface of the heat medium pipe is in sliding contact, and an O-ring is provided in the sliding contact region between the pipe sliding contact hole and the outer peripheral surface of the heat medium pipe. a moving part having a sealing means of
The second flange has an inner peripheral surface with a diameter larger than the outer diameter of the heat medium pipe, thereby forming a gap between the second flange and the outer peripheral surface of the heat medium pipe, and inserting it through the through hole. Having a first fastening portion that adjusts fastening to the casing by connecting the first flange with bolts,
The first flange and the second flange have a first displacement mechanism capable of displacing the vertical position of the heat medium pipe up and down by loosening the first fastening portion,
Even after adjusting the vertical position of the heat medium pipe by tightening the first fastening portion, the second flange can change the position of the heat medium pipe in accordance with the position change of the joint portion. It is characterized by having a second change mechanism .
A second invention is based on the first invention, wherein the outer diameter of each of the drying plate portions is alternately smaller and larger than the outer diameter of the immediately lower plate portion. It is characterized in that it is configured to be
A third invention is the first invention or the second invention , wherein a recessed region having a larger diameter than the through hole is formed so as to surround the through hole on the inner surface side of the casing. ,
When the inner diameter of the recessed region is D1 and the outer diameter of the first flange is D2,
having a relationship of D1>D2,
It is characterized in that the heat medium pipe can be displaced in the vertical direction within the range of the difference between D1 and D2 .
A fourth invention is, in any one of the first to third inventions, a pressing portion fastened and fixed to the second flange,
an annular collar portion accommodated in an annular collar portion accommodation area continuously formed in the circumferential direction between the inner surface of the pressing portion and the outer surface of the second flange;
The flange portion is continuously protruded in a circumferential direction of the outer diameter of the heat medium pipe,
Within the collar accommodation area,
The flange portion is displaceable according to the position of the fitting hole of the joint portion,
Further, the movement of the heat medium pipe is restricted by the flange portion coming into contact with the second flange or the pressing portion .
According to a fifth invention, in any one of the first invention to the fourth invention, the joint portion where the tip portion of the heat medium pipe is inserted into the joint portion includes:
At least one or more O-rings are provided for sealing the heat medium pipe and the joint,
A gap is provided so that the tip of the heat medium pipe does not abut deep into the socket of the joint portion .
A sixth aspect of the invention is a displacement adaptation method for a heat medium pipe of a drying device for inserting a heat medium pipe for flowing a heat medium into a joint portion of a drying section installed in a casing for drying an object to be dried, comprising:
A temporary tightening step in which the first flange on the inner side of the casing and the second flange on the outer side of the casing are attached to the casing to the extent that they do not fall;
The heat medium pipe is adapted to the position of the fitting hole of the joint portion, and as the first flange is vertically displaced along the side plate portion of the casing, the entire heat medium pipe is displaced to displace the heat. a step in which the medium pipe is inserted into the fitting hole of the joint;
retightening the first flange and the second flange to the casing for assembly and fixation;
Even after the retightening step, the heat medium pipe adapts to the displacement of the joint portion and the connection fitting hole, and the gap between the outer peripheral surface of the heat medium pipe and the outer diameter of the heat medium pipe and a step adapted to be displaceable by means of a movable portion having sealing means formed of an O-ring in the circumferential direction.

According to the present invention, in the portion where the heating medium pipe that supplies the heating medium to the shelf board penetrates the casing of the drying apparatus, the influence of manufacturing errors and assembly errors of each part, deformation of each part due to temperature change, etc. , troubles such as damage to parts due to improper assembly or excessive stress, deterioration of airtightness, etc. can be suppressed.
Specifically, first, in order to pass the heat medium pipe through the casing in a state where the sealing means in which the O-ring is attached to the seal groove provided on the outer peripheral portion of the heat medium pipe is provided, the manufacturing accuracy of each part and the Since there is no need to improve the assembly accuracy, it is possible to reduce the cost of the equipment. Even if parts are deformed due to temperature changes or pressure changes in the casing, the degree of freedom in the connection between the casing and the heat medium piping absorbs the deformation and prevents damage to each part. Thirdly, the heat transfer pipes are easy to attach and detach, so maintenance is easy when disassembling and cleaning the equipment. Fifth, since there is no need to install expensive parts such as expansion joints, the cost of equipment can be reduced. Sixthly, by limiting the movable range of the heat medium pipes, it is possible to provide a drying apparatus equipped with heat medium pipes that can reduce the risk of the heat medium pipes coming off or causing leaks.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic whole perspective view which shows the drying apparatus of 1st embodiment. It is a schematic vertical perspective view in the drying apparatus of 1st embodiment. It is a schematic vertical front view in the drying apparatus of 1st embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing a structure in which a heating medium pipe of a first embodiment according to the present invention is held by a casing, and (a), (b), (c), and (d) are enlarged views of main parts; (a) is the neutral state before displacement of the heat medium pipe, (b) is the state in which the entire heat medium pipe is displaced downward, and (c) is the state in which the entire heat medium pipe is displaced upward. , (d) is a state in which the tip side displacement of the heat medium pipe is directed downward, (e) is a state in which the tip side displacement of the heat medium pipe is directed upward, and (f) is a state in which the heat medium pipe rotates. It is a schematic sectional view showing a state. It is a sectional view showing heat-medium piping of a drying device of a second embodiment concerning the present invention. In the third embodiment according to the present invention, (a) is the neutral state before displacement of the heat medium pipe, (b) is the state in which the tip of the heat medium pipe is displaced downward, and (c) is the displacement of the tip of the heat medium pipe. is a schematic cross-sectional view showing the state of the upper side. (a) is a schematic cross section showing a neutral state before displacement of the pipe in a connection airtightness test of the heat medium pipe of the heat medium dryer of the present invention. (b) is a schematic cross-sectional view showing the state of angular displacement of the piping in the connection airtightness test of the heating medium piping of the heating medium drying apparatus of the present invention. FIG. 10 is a schematic vertical cross-sectional front view showing another embodiment incorporating another blade configuration in the drying apparatus of the first embodiment. FIG. 10 is a schematic perspective view partially showing another embodiment in which another blade configuration is incorporated in the drying device of the first embodiment. FIG. 11 is a schematic plan view showing how a drying medium is scraped off in a drying device of another embodiment;

An embodiment of the drying apparatus of the present invention will be described below.
It should be noted that this embodiment is merely one embodiment of the drying apparatus of the present invention, and is not to be construed as being limited to this embodiment, and design changes can be made as appropriate within the scope of the present invention. Hereinafter, in the embodiments of this specification, the same reference numerals are given to the same members throughout.

[Drying device of the first embodiment]
1 to 3 are a schematic overall perspective view, a schematic vertical sectional perspective view and a schematic vertical sectional front view showing a drying apparatus according to a first embodiment of the present invention.
The drying apparatus of the present embodiment comprises a frame 1 combined in a rectangular shape, a casing 2 disposed inside the frame 1, and a wet drying medium (hereinafter referred to as a drying medium) disposed within the casing 2. , a drying medium input unit 32 for inputting the drying medium; It includes a medium distribution unit 19 and is configured to be separable (disassembled) and assembled.
In addition, in this embodiment, a powdery medicine (powder) is assumed as the dry medium.

The casing 2 is composed of a cylindrical side plate portion 3 with open upper and lower ends, a top plate portion 4 that seals the open upper end of the side plate portion 3, and a bottom plate portion 5 that seals the open lower end of the side plate portion 3. (See, eg, FIG. 2).
The material of the casing 2 is rust-resistant and corrosion-resistant, such as SUS316L, but is not limited to this.

In the side plate portion 3, a plurality of through-holes (heat-medium-pipe-incorporating-hole portions on the delivery side) 3a are formed on the same line in the vertical direction H at predetermined intervals, and the plurality of through-holes 3a. A plurality of through-holes (heat-medium-pipe-incorporating-hole portions on the discharge side) 3b are formed so as to face each other, and heat-medium pipes 40 are inserted thereinto. The through hole 3a and the through hole 3b are each formed in a short cylindrical shape having a larger diameter than the outer diameter of the heat medium pipe 40 (see FIGS. 3 and 4, for example).
In this embodiment, as shown in FIG. 4, the heat medium pipe 40 is attached to and detached from the through holes 3a and 3b through the first flange 50 on the inside of the casing 2 and the second flange 56 on the outside of the casing 2. installed as possible. The first flange 50 and the second flange 56 function as a heat medium pipe holding portion 64 .

The top plate portion 4 is formed in a truncated cone shape in a cross-sectional view by a flat surface portion 4a in the shape of a small-diameter disk and an inclined surface portion 4b that is inclined downward from the outer periphery of the flat surface portion 4a. A main shaft 8 is rotatably held in the center via a bearing. The main shaft 8 is connected to the driving portion 9 in the outer region of the top plate portion 4 and is rotatably arranged in the inner central region of the casing 2 . Blade holding portions 30 for suspending and holding the dispersion guide portions 27 are detachably fixed to the flat surface portion 4a at four locations at equal intervals. Furthermore, a drying medium input portion 32 connected to the drying medium (powder) supply means and the outer side of the casing 2 is arranged in the casing 2 through the flat surface portion 4a (see, for example, FIG. 3). .
The drying medium (powder) supply means is not particularly limited, and within the scope of the present invention, a rotary valve, a screw feeder, a table feeder, or the like can be appropriately selected and employed. The drying medium (powder) supply means may have the function of continuously supplying the drying medium or the function of intermittently supplying the drying medium. It may have a function of detecting the phase of and controlling the supply of the drying medium.

The bottom plate portion 5 is provided with a discharge portion 6 in a central region thereof, and is formed in a conical shape having a downwardly tapered surface portion toward the discharge portion 6 in order to facilitate drainage of the cleaning liquid during the cleaning process. there is
The discharge section 6 has a function of guiding the dry medium that has been dried and dropped from the lowermost drying section 10 (the sixth drying section 10f in this embodiment) to the outside of the apparatus.
The discharge part 6 is formed in a cylindrical shape with open upper and lower ends, which narrows downward. The inner diameter of the open upper end of the discharge section 7 is vertically provided from the drying medium drop hole section 110 of the drying plate section 11 of the lowermost drying section 10 (the sixth drying plate section 11f of the sixth drying section 10f in this embodiment). The inner diameter of the lower end of the shooter 17 is formed to be larger than the inner diameter of the lower end of the shooter 17, so that the falling drying medium after drying is prevented from spilling outward.
A series of schematic flows of these drying media are indicated by arrows in FIG. Specifically, the drying medium on the drying plate portion 11 rotates in the circumferential direction and also moves in a spiral shape in the circumferential direction, so that an arrow shown in FIG. fall in the direction of
The form of the discharging part 6 is not particularly limited to the illustrated form, and can be appropriately changed within the scope of the present invention.

The drying section 10 is configured in a multistage manner from a first drying section to an n-th drying section in the vertical direction H. In the present embodiment, the first drying section 10a, the second drying section 10b, the third drying section 10c, It is configured in a 6-stage tray type including a fourth drying section 10d, a fifth drying section 10e, and a sixth drying section 10f.

Each of the drying sections 10 (first drying section 10a to sixth drying section 10f) includes a drying plate section (heat transfer plate section) 11 that receives and dries the drying medium falling from above in the vertical direction H, and a drying plate and a scraping guide section 18 for causing the drying medium on the section 11 to drop sequentially to the lower drying section 10 .

The drying plate part 11 is formed in a disk shape, fixed to the top plate part 4 and fixed to a plurality of pillars 7 arranged in the vertical direction H in the casing 2, and is fixed to a predetermined distance in the vertical direction H. They are horizontally spaced apart from each other.
In the present embodiment, from the first drying plate portion 11a constituting the first drying portion 10a to the sixth drying plate portion 11f constituting the sixth drying portion 10f, the small diameter drying plate portion and the large diameter drying plate portion The size of each plate is changed so as to be repeated alternately with the drying plate portion of each.
That is, from the top in the vertical direction H, the first drying plate portion 11a has a small diameter, the second drying plate portion 11b has a large diameter, the third drying plate portion 11c has a small diameter, and the fourth drying plate portion 11d has a small diameter. The fifth drying plate portion 11e has a small diameter, and the sixth drying plate portion 11f has a large diameter.

In this embodiment, the small-diameter drying plate portion 11 (the first drying plate portion 11a, the third drying plate portion 11c, and the fifth drying plate portion 11e) rises in the direction of the main shaft 8 over the entire inner diameter. It has a sloped dry medium drop prevention cover (not shown), but the outer diameter side is flat.
On the other hand, the large-diameter drying plate portion 11 (the second drying plate portion 11b, the fourth drying plate portion 11d, and the sixth drying plate portion 11f) has a It has a drying medium drop prevention cover portion (not shown) with an upward slope, but the inner diameter side is flat and a large drying medium drop hole portion 110 is formed.

The drying plate portion 11 is provided with a heat medium accommodating portion 12 having substantially the same diameter as the plate portion on its lower surface, and is configured such that heat is transferred to the entire plate portion by the heat medium flowing therein.
The heat medium containing portion 12 is connected by inserting a heat medium pipe 40 communicating with a heat medium supply pipe disposed outside the casing 2, and a joint portion 13 for allowing the heat medium to flow into the heat medium containing portion 12. At a predetermined position of the heat medium containing portion 12 facing the joint portion 13, a joint portion 14 is inserted and connected to a heat medium pipe 40 for flowing out the heat medium from the heat medium containing portion 12. provided (for example, see FIGS. 3 and 4).
The joint portion 13 and the joint portion 14 are formed in a tubular shape to communicate with the inside of the heat medium containing portion 12 and protrude horizontally from the heat medium containing portion 12. Heat medium pipes 40 can be connected to the projecting ends of the joint portions 13 and 14. fitting hole 13a (14a).
In the present embodiment, hot water, for example, is used as a heat medium in order to heat and dry the drying medium. Note that the heat medium may be steam, oil, or cold water, and can be appropriately changed according to specifications.
Moreover, the form such as the size and shape of the heat medium containing portion 12 is not limited to the present embodiment, and can be appropriately modified within the scope of the present invention.

In the drying medium drop hole portion 110 of the sixth drying plate portion 11f constituting the sixth drying portion 10f (lowermost drying portion 10), a shooter with a narrowed lower end is provided so as to extend continuously from the open upper end. 17 are integrally attached.

The scraping guide portion 18 has a base end fixed to the main shaft 8 and an arm portion 180 extending in the outer diameter direction of the drying plate portion 11 at the other end side. and a blade portion 181 that slides on the upper surface of the plate portion 11 , and slides on the drying plate portion 11 in a predetermined direction in synchronization with the rotation of the main shaft 8 . The blade portion 181 is assumed to be one long blade-like one formed with a predetermined length in the longitudinal direction of the arm portion 180 (see FIG. 3).
As will be described later, a plurality of short blades (strip-shaped blades) may be attached in the lengthwise direction of the arm. A blade having an optimal form can be employed within the scope of the present invention.

[Heat medium pipe of the first embodiment]
Next, the heat medium piping in the drying apparatus according to the first embodiment of the present invention will be described. Such a heat medium pipe is inserted from the outside of the casing 2, and the position at which the heat medium pipe 40 connected to the joint portion 13 (14) of the drying plate portion 11 is installed in the casing 2 is set vertically or horizontally. Not only the relative position but also the relative angle may deviate.

For this reason, the mounting structure between the heat medium pipe 40 and the casing 2 has a unique structure. That is, the casing 2, the heat medium pipe 40, the first flange 50, and the second flange 56 are configured to be connected and fitted with the joint portion 13 (14). This will be explained below.

FIG. 4 is a schematic cross-sectional view showing a structure in which the heat medium pipe 40 of the first embodiment according to the present invention is held by the casing 2. As shown in FIG. Since this heat medium pipe 40 has the same embodiment on the heat medium input side and the heat medium discharge of the casing 2, the heat medium pipe 40 on the input side will be explained. Moreover, the said heat carrier is one Embodiment using warm water. In this embodiment, the heat medium pipe 40 arranged in the through hole 3a (3b) provided in the side plate portion 3 is described, but the side plate portion 3 is not limited to the top plate portion 4 or the bottom plate portion 6. It can be applied to a predetermined location of the containing casing.

The present invention, as shown in FIG. 4, is a drying apparatus in which a heating medium is passed through a drying section 10 installed in a casing 2 in order to heat an object to be dried during drying. A through hole 3a (3b) provided, a heat medium containing portion 12 provided in the drying section 10, a joint portion 13 (14) provided in communication with the heat medium containing portion 12, and a through hole 3a (3b ) and connected to the joint portion of the drying section 10 to flow the heat medium, and a pair of first flange 50 and second flange 56 that hold the heat medium pipe 40 to the casing 2. and a heat medium pipe holder 64 . An O-ring (sealing means) 55 is stored in the first flange 50 of the heat medium pipe holding portion 64 .

The casing 2 is a metal outer cylindrical body, and a circular through-hole 3 a ( 3 b ) having an inner diameter larger than the outer diameter of the heat medium pipe 40 is formed in the side plate portion 3 in the vertical direction H of the casing 2 . A heat medium pipe 40 through which the heat medium passes is inserted into the through hole 3a (3b) of the casing 2 during assembly. The material of the casing 2 is rust-resistant and corrosion-resistant, such as SUS316L, but is not limited to this.

The heat medium pipe 40 is a heat medium nozzle and is formed in a substantially tubular shape, and a heat medium flow path is formed in the inside (cavity) thereof. In this embodiment, hot water is used as the heat medium because the object to be dried is pharmaceutical powder.
The material of the heat medium pipe 40 is a rust-resistant and corrosion-resistant metal such as SUS316L, but is not limited to this. For example, even if it is made of resin, it is within the scope of this embodiment.

As shown in the enlarged view of the inner part of the circle in FIG. 4( a ), the heat medium pipe 40 has a tip side region of the outer peripheral surface, that is, a tip outer peripheral region fitted into the joint portion 13 ( 14 ) of the drying plate portion 11 . An annular seal groove is recessed continuously in the outer diameter circumferential direction in 40a. In this embodiment, a plurality of seal grooves 41 are provided at predetermined intervals in the axial direction (horizontal direction indicated by arrow L (see FIG. 4)). An O-ring 42 as a sealing means is fitted in each seal groove 41 so that a part of the O-ring 42 protrudes outward.

As a result, airtightness is maintained at the connecting portion between the heat medium pipe 40 and the joint portion 13 (14).
In addition, the seal groove 41 between the joint portion 13 (14) and the heat medium pipe 40 is not fixed with a bolt or the like, but an outer circumference of the heat medium pipe 40 is formed so that the heat medium pipe 40 can be connected. Although a plurality of rings are provided (in this embodiment, O-rings are attached to three seal grooves 41 ), the present invention is not limited to this. For example, one, two, or four or more seal grooves 41 and O-rings of the heat medium pipe 40 may be provided corresponding to the length of the joint portion on the joint portion 13 (14) side.

In this case, it is possible to adjust the position in the axial direction of the heat medium pipe 40 even with a single O-ring 42, but a plurality of O-rings can be used for reliable sealing. Moreover, since the parallelism between the heat medium pipe 40 and the joint portion 13 (14) is more likely to be maintained with two or more O-rings 42, the risk of breakage and metal contamination due to contact between both parts is reduced.

In the assembly work, when inserting the heat medium pipe 40 into the casing 2 , the casing 2 and the heat medium pipe 40 are sealed via the first flange 50 and the O-rings 55 and 65 . This is for the purpose of confining the outflow from the inside to the outside, preventing contamination from the outside, and performing drying under a desired pressure.
Furthermore, in drying equipment that dries high-value-added products such as pharmaceuticals, it is necessary to contain the highly pharmacologically active pharmaceuticals when drying the powder, which is dangerous if it leaks out, and to prevent the contamination of impurities during drying. In order to maintain efficiency, high airtightness is required for the casing, and at the same time, frequent and complete cleaning is necessary to maintain the cleanliness of the equipment. is also required.

Further, the material of the O-ring of this embodiment is fluororubber (FKM) and is formed into a ring shape. The material of the O-ring is not particularly limited to fluororubber (FKM), but may be perfluoroelastomer (FFKM), for example.

In addition, there is a conventional method in which the joints 13 (14) are expansion joints such as bellows (bellows) so that they can be easily connected to each other. In addition, the bellows is made of metal or resin because there is a risk of foreign matter contamination due to poor cleaning.
Therefore, since it is difficult to adjust the connection such as by bending the joint portion 13 (14) greatly, it is possible to connect and fit the joint portion 13 (14) on the heat medium pipe 40 side.

Further, as shown in the enlarged view of the inner part of the circle in FIG. 4(b), in the substantially central region of the outer peripheral surface of the heat medium pipe 40, that is, in the central outer peripheral region 40b in sliding contact with the inner peripheral surface of the first flange 50, , an annular seal mounting projection 43 is continuously projected in the outer diameter circumferential direction. The seal mounting protrusion 43 is formed in a tapered chevron shape when viewed in cross section, and a seal groove 44 for fitting the O-ring 65 is recessed in the vertical direction H from the tip. The side walls 45, 45 positioned outside the seal groove 44 are formed with curved surfaces that slope downward from the tip (upper end). Tip regions of the side walls 45, 45 are also curved.

Since the first flange 50 and the side walls 45, 45 do not come into contact with each other and can swing due to the provision of such side walls 45, 45, the tip of the heat medium pipe 40 can be flexibly displaced. and functions as the movable part 80 . Due to this movable portion 80, the installation position of the heat medium pipe 40 is determined by the relative positional relationship with the joint portion 13 (14) side, and the assembly work such as after disassembly and cleaning can be easily and reliably performed.

Furthermore, as shown in the enlarged view of the inner part of the circle in FIG. The annular collar portion 46 is accommodated with play in the annular collar portion accommodation area S formed continuously in the circumferential direction between the inner surface of the pressing portion 60 that holds the outer surface of the second flange 56 and the outer surface of the second flange 56. It continuously protrudes in the direction.

In the present embodiment, the flange portion 46 is formed (projected) as a ridge that protrudes from the outer peripheral surface of the heat medium pipe 40 in a trapezoidal shape in a cross-sectional view and is continuous in the outer peripheral direction.
A first rising peripheral surface portion 47 of the flange portion 46 on the side facing the second flange 56 is raised by a predetermined height perpendicular to the outer peripheral surface of the heat medium pipe 40 in the vertical direction H, and faces the pressing portion 60. The second rising peripheral surface portion 48 on the side is raised from the outer peripheral surface of the heat medium pipe 40 to a predetermined height in an inclined manner. The upper end surface portion 49 provided continuously over the is formed in a flat surface in a cross-sectional view. The collar portion 46 is formed concentrically with the heat medium pipe 40 .

In this embodiment, the edge 61 of the pressing portion 60 is chamfered to form a curved shape. When the heat medium pipe 40 is displaced due to a change in angle, there is a possibility that the second rising peripheral surface portion 48 of the flange portion 46 and the end portion 61 come into contact within the range of the flange accommodation area S, but the end portion 61 are chamfered, the pressing portion 60 and the flange portion 46 can smoothly come into contact with each other within the range of the flange portion accommodating region S, so that damage to each other can be mitigated.
It is also possible to form the second rising peripheral surface portion 48 into a curved surface (a rounded inclined surface).

In this manner, the movement of the heat medium pipe 40 is restricted by the flange 46 coming into contact with the second flange 56 or the pressing portion 60 within the flange accommodation area S. That is, the ring-shaped flange 46 that functions as a stopper for the heat medium pipe 40 prevents excessive displacement that may impair the sealing function when adjusting the position of the heat medium pipe 40 in the axial direction and at the tip of the heat medium pipe. 40 is formed on the outer peripheral surface.
It should be noted that the position of the heat medium pipe 40 can be adjusted even if the inclined surface has a tapered shape (straight inclined surface) rather than a curved surface.

The heat medium pipe holding portion 64 is composed of a pair of the first flange 50 and the second flange 56 . The first flange 50 is formed in an annular shape with a predetermined thickness and a predetermined outer diameter, and is disposed in contact with a recessed region Q provided on the inner surface of the side plate portion 3 of the casing 2 . The hollow region Q is formed in a cylindrical shape having a larger diameter than the through hole 3a (3b) so as to surround the through hole 3a (3b). In the case where the recessed area Q is formed as an integrated structure in which the heat medium pipe holding portions 64 arranged in a straight line in the vertical direction are integrated, the recessed area Q may be formed in a rectangular shape as a vertically elongated recess.
A pipe slide contact hole portion 51 is formed on the inner diameter side of the first flange 50, with which the seal mounting protrusion 43 provided on the outer periphery of the heat medium pipe 40 is slidably contacted via an O-ring.
The first flange 50 is provided with a predetermined number of connection holes 53 for connecting from the outside of the second flange 56 via the first bolts 52 . The connecting hole portion 53 is formed in a non-penetrating manner at a predetermined position of the surface portion facing the through hole 3a (3b), and has a female thread into which the male thread of the first bolt 52 can be screwed. there is

Further, as shown in the enlarged view of the inner portion of the circle in FIG. 4(d), an annular seal groove 54 having a substantially U-shaped cross section is formed on the surface portion of the first flange 50 that abuts on the recessed region Q. An O-ring 55 is mounted in the annular seal groove 54 . Thereby, airtightness is maintained in the contact area between the casing 2 and the first flange 50 . In addition, in this embodiment, a set of seal regions composed of the annular seal groove 54 and the O-ring 55 is provided, but a plurality of sets of seal regions may be provided.

The inner diameter D1 of this recessed region Q is larger than the outer diameter D2 of the first flange 50, and is recessed by a length substantially equal to the thickness of the first flange 50. It has a connecting hole portion 53 for a connecting bolt that connects with a second flange 56 that faces.

The outer diameter D2 of the first flange 50 is smaller than the inner diameter D1 of the recessed region Q. Even if there is a deviation in all directions of 360 degrees, the heat medium pipe 40 is displaced according to the position of the fitting hole 13a (14a) of the joint portion 13 (14) to which the heat medium pipe 40 can be connected. It is possible to move.
As a result, when reassembling work after disassembling and cleaning work, the installation position of the heat medium pipe 40 is determined by the relative positional relationship between the joint portion 13 (14) and the heat medium pipe 40, and the connection and assembly work is easy and reliable. It can be done.

The second flange 56 is formed in an annular shape with a predetermined thickness and a predetermined outer diameter. It is formed to have a diameter smaller than that of the hole 3a (3b), and the inner diameter side is provided with a pipe loose insertion hole portion 57 formed so as to have a predetermined gap from the outer peripheral surface of the heat medium pipe 40. .

The second flange 56 is a connection for connecting the side plate portion 3 of the casing 2 with the first flange 50 and the second flange 56 by screwing the first bolt 52 into the connection hole portion 53 of the first flange 50 . A predetermined number of holes 58 are provided. The connecting hole portion 58 is bored through a predetermined position of the surface portion facing the through hole 3a (3b), and a female screw is not formed on the inner surface thereof.
In addition, the second flange 56 has a plurality of second connecting holes 59 for connecting and fixing the pressing portion 60 provided on the outside to the second flange 56 , and a predetermined number of second connecting holes 59 are provided at positions avoiding the connecting holes 58 . is provided. A female thread into which the second bolt 70 is screwed is formed on the inner surface of the second connecting hole portion 59 .

The pressing portion 60 is formed in a rectangular plate shape having a predetermined thickness in the axial direction L and a predetermined length in the vertical direction H. The length in the vertical direction H is shorter than the outer diameter D3 of the second flange 56, is provided with a second loose pipe insertion hole portion 62 having the same inner diameter as the loose pipe insertion hole portion 57 of the second flange 56 .

A depression region Q2 having an inner circumference larger in diameter than the pipe loose insertion hole portion 57 of the second flange 56 is formed on the inner surface of the pressing portion 60, and an annular flange Q2 is formed between the outer surface of the second flange 56 and the outer surface of the second flange 56. A partial accommodation area S is formed.
Further, a plurality of third connecting holes 63 for connecting and fixing the pressing portion 60 to the second flange 56 via the second bolts 70 are formed through, and internal threads are not formed on the inner surfaces thereof. .

This collar part accommodation area S is an area in which the annular collar part 46 is accommodated with play, and as shown in the partially enlarged view of the circle in FIG. In this case, the first rising peripheral surface portion 47 and the second rising peripheral surface portion 48 of the flange portion 46 are positioned within the flange accommodating region S so as not to cause excessive displacement that impairs the sealing function. By abutting against the pressing portion 60, the pressing portion 60 and the flange portion 46 of the heat medium pipe 40 function as stoppers. In addition, it functions as a stopper to prevent the heat medium pipe 40 from coming off.

Furthermore, in order to absorb variations in the relative positions of the heat medium pipe holding portion 64 including the casing 2 and the joint portion 13 (14) integrated with the drying portion in the central axis direction, the tip of the heat medium pipe is placed in a neutral state. However, a gap R for connection is provided so that it does not strike the socket of the joint portion.
As a result, the connecting portion between the heat medium pipe 40 and the joint portion 13 has a degree of freedom in the relative position in the central axis direction, and the positional error is absorbed.
Further, the holding part 60 keeps the angle change of the heat medium pipe 40 within a certain range, and at the same time, the heat medium pipe 40 is removed from the joint part 13 (14) and the first flange 50 and installed on the heat medium pipe 40. It has the function of preventing the O-rings 65 and 42 seals being compromised.

[Procedure for installing the heat medium pipe]
Next, an example of the procedure for attaching the heat medium pipes 40 will be outlined.
(1) All parts including the drying section 10 held on the top plate section 4 are assembled outside the casing 2 .
(2) Lightly attach the first flange 50 and the second flange 56 to the through hole 3a of the casing 2 so as not to fall off (to the extent that they can be moved by hand).
(3) A set of parts held by the top plate portion 4 is inserted into the casing 2 so as to align both central axes and phases, and the top plate portion 4 is fixed to the casing 2 by tightening bolts.
(4) Slide the first flange 50 and the second flange 56 to visually roughly align the center axes of the flanges 50 and 56 with the center axis of the insertion opening of the joint portion 13 .
(5) Insert the heat medium pipe 40 into both the flanges 50 and 56 and the joint portion 13 .
(6) The first bolts 52 that hold the first flange 50 and the second flange to the casing 2 are retightened and fixed.
(7) Attach the pressing portion 60 to the second flange with the second bolt 70 .
(8) Attach a flexible hose (not shown, hereinafter the same) to the heat medium pipe 40 .
In the above procedure, the position of the pair of flanges is roughly adjusted in step (4). The relative positions of the heat medium pipe, the joint portion 13 and the casing 2 are determined.
That is, the relative position is determined by inserting the heat medium pipe 40 into the joint portion 13 (14) of the drying section 10 via the heat medium pipe holding portion 64 .

Using FIG. 5, an example of position adjustment until the relative position is determined by displacing the heat medium pipe 40 according to the position of the fitting hole 13a (13b) to which the heat medium pipe 40 of the joint part 13 (14) can be connected. will be explained. 5(a) shows a neutral state before the heat medium pipe 40 is displaced (before adaptation), FIGS. 5(b) and 5(c) show only vertical displacement from the neutral state (after adaptation), and FIG. (d) and FIG. 5(e) show the relative positions when only the angle is displaced (tilted) from the neutral state (after adaptation). FIG. 5(f) shows a case (after adaptation) in which the heat medium pipe 40 rotates.
That is, the variation in the relative position between the casing 2 and the joint portion 13 (14) due to the manufacturing accuracy and assembly accuracy of each part may include not only the position but also the angle. Even when the heat medium pipe 40 before retightening is inserted into the joint portion 13 (14), not only FIGS. 5(b) and 5(c) but also FIGS. This is because a positional relationship for absorbing a large relative angle error can occur. On the other hand, after retightening the flanges 50 and 56 to create a sealed state, for example, the relative angle It is only possible to follow the change in the axial direction of the heat medium pipe and rotate it.
5(a) to 5(e) refer to the reference numerals in FIG. 4 as necessary. They will be described in order below. In this embodiment, the heat medium pipe 40 arranged in the through hole 3a (3b) provided in the side plate portion 3 is described, but the side plate portion 3 is not limited to the top plate portion 4 or the bottom plate portion 6. It can be applied to a predetermined location of the containing casing.
In this embodiment, a through-hole 3a (3b) provided in a cylindrical side plate portion 3 with the upper and lower ends of a casing 2 open, and a joint portion 13 (14) of a drying section 10 is connected to the through-hole 3a (3b). A heat medium pipe 40 inserted until it is inserted until the heat medium flows, and a heat medium pipe holding portion 64 consisting of a pair of first flange 50 and second flange 56 that holds the heat medium pipe 40 in the casing 2, A heat medium pipe holder 64 is adapted to the position of the heat medium pipe 40 connected to the fitting hole 13a (14a). That is, the position (angle) of the heat medium pipe 40 is determined by the position (angle) of the fitting hole 13 a ( 14 a ), and the heat medium pipe holder is adapted to the position (angle) of the heat medium pipe 40 .
That is, the heat medium pipe 40 is displaced according to the position of the fitting hole 13a (14a) to which the heat medium pipe 40 of the joint portion 13 (14) can be connected. This is effective in following variations in the relative position between the casing 2 and the joint portion 13 (14) of the heating portion due to the manufacturing accuracy and assembly accuracy of each part.
It should be noted that descriptions of all cases of movement in which the heat medium pipe 40 is displaced in accordance with the position of the fitting hole 13a (14a) to which the heat medium pipe 40 of the joint portion 13 (14) can be connected overlap. Therefore, first, in FIG. 5B, the casing 2 is sandwiched between the first flange 50 and the second flange 56, and the heat medium pipe holding portion 64 displaces the heat medium pipe 40 vertically along the side plate portion 10. Then, each example of the embodiment in which the position adjustment displacement is applied until the relative position of the heat medium pipe 40 is determined will be described below.

[Embodiment in which the heat medium pipe is adapted to displacement in the vertical direction]
In the above procedure (5), when the heat medium pipe 40 is inserted into both the flanges 50 and 56 and the joint portion 13, the center axis of the heat medium pipe 40 in the state of the neutral position before displacement and the socket of the joint portion 13 When the central axes of are parallel, the socket of the joint part 13 (14) on the connection partner side is the axial center line L0 of the heat medium pipe 40 (the central axis of the heat medium pipe in the neutral position state, the same applies hereinafter) , the first flange 50 and the second flange 56 (heat medium pipe) within the range of the diameter D1 of the recess region Q. The holding portion 64) is moved (displaced) downward (indicated by an arrow) in the vertical direction H, and the position is adjusted until the relative position of the heat medium pipe 40 is determined (see FIG. 5B). The drawing shows the movement of the first flange 50 positioned in the recessed region Q of the casing 2 downwardly moving within the recessed region Q. As shown in FIG.
Alternatively, when the socket of the joint portion 13 (14) on the connection partner side is above the center line L0 in the axial direction of the heat medium pipe in the vertical direction H (center line L2), the diameter D1 of the recessed region Q It can be achieved by moving the first flange 50 and the second flange 56 (the heat medium pipe holding portion 64) upward (the arrow symbol) in the vertical direction H within the range (see FIG. 5(c)). The drawing shows the movement of the first flange 50 positioned in the recessed region Q of the casing 2 upwardly within the recessed region Q. As shown in FIG.
After that, the first bolts 52 that hold the first flange 50 and the second flange to the casing 2 are retightened and fixed in accordance with the above procedure (6).
It is also possible to rotate the heat medium pipe 40 after connecting it to the flexible hose (see FIG. 5(f)). As a result, twisting of the flexible hose generated after connecting the flexible hose or the like to the ferrule joint on the side opposite to the joint portion 13 (14) of the heat medium pipe 40 (the left end of the heat medium pipe 40 in FIG. 4) can be It absorbs without disassembling the parts, and has the effect of preventing damage to the flexible hose.

[Embodiment of displacement adaptation by tilting the tip of the heat medium pipe up and down]
If there is a relative positional deviation between the casing and the joint portion of the heating unit due to the manufacturing accuracy and assembly accuracy of each part, it is necessary to absorb the relative angle error. Therefore, between the heat medium pipe 40 and the heat medium pipe holding portion 64 that holds the heat medium pipe 40 in the casing 2 and the heat medium pipe 40, the heat medium pipe 40 of the joint portion 13 (14) can be connected. A movable portion 80 having sealing means (O-ring 65) is provided so that the heat medium pipe can be displaced according to the position of the hole 13a (14a).

According to this movable part 80, the O-ring 65 on the outer circumference of the heat medium pipe 40 is brought into contact with the first flange 50, and the angle of the heat medium pipe is variable. It is effective to follow the variation in the relative position between the casing and the joint part of the heating part caused by the It is also effective in tracking changes in relative position with the joint.

It should be noted that the description of all the movements in which the heat medium pipe 40 is displaced in accordance with the position of the fitting hole 13a (14a) to which the heat medium pipe 40 of the joint part 13 (14) can be connected is duplicated. Therefore, an example in which the position of the heat medium pipe 40 is adjusted in FIG. 5D will be described below.
In the above procedure (5), as shown in FIG. 5D, when the heat medium pipe 40 is inserted into both the flanges 50 and 56 and the joint portion 13, the center axis of the heat medium pipe 40 at the neutral position and the joint portion 13 are not parallel (the center line L3 of the central axis of the heat medium pipe in the displaced state), the joint part 13 (14) is positioned at the center of the heat medium pipe in the neutral position of the heat medium pipe 40. When the pipe angle θ1 is below the center line L0 of the shaft, the O-ring is rotated within the range where the inner peripheral surface of the joint side of the inner periphery of the second flange 56 contacts the outer peripheral surface of the heat medium pipe. This can be achieved by adjusting the position of the central axis so that the tip of the heat medium pipe 40 is tilted upward and returned by the pipe angle θ1.
When displaced by the pipe angle .theta.1 in this way, the flange 46 in the storage area S serves as a stopper that does not come into contact with the pressing portion 60 and become excessively movable, impairing the sealing function. Specifically, the heat medium pipe 40 of the drying apparatus of the present invention is set so that the pipe angle is within θ1 (for example, −5° when the downward angular displacement is − (minus)) as a range that does not impair the sealing function. is limited to

In addition, when the heat medium pipe 40 is inserted into the flanges 50 and 56 and the joint portion 13 in step (5), the central axis of the heat medium pipe 40 at the neutral position and the central axis of the socket of the joint portion 13 are not parallel. In the case (center line L4), in FIG. 5E, when the joint portion 13 (14) is above the center line L0 in the axial direction (horizontal direction) L of the heat medium pipe 40 by the pipe angle θ2, 2 Within the range where the inner peripheral surface of the joint side of the inner diameter of the flange 56 and the outer peripheral surface of the heat medium pipe are in contact, the O-ring is used as the rotation center axis, and the tip of the heat medium pipe 40 is tilted downward by a pipe angle of θ2. This can be achieved by displacing
When displaced back by the pipe angle θ2 in this way, the collar portion 46 in the housing area S serves as a stopper to prevent excessive movement that impairs the sealing function by coming into contact with the pressing portion 60 .
Specifically, the heat medium pipe 40 of the drying apparatus of the present invention is set so that the pipe angle is within θ2 (for example, +5° where the downward angular displacement is + (plus)) as a range that does not impair the sealing function. Limited.
Further, as shown in FIG. 5(f), it is also possible to adjust the position while rotating the heat medium pipe 40 (center line L5).

As described above, the heat medium pipe 40 is displaced according to the position of the fitting hole 13a (14a) to which the heat medium pipe 40 of the joint portion 13a (14a) can be connected. Tilt the tip up and down to displace the pipe angle and adjust the position, even after the second flange portion 56 and the holding portion 60 are bolted and the heat medium pipe 40 is arranged, the flange portion of the recessed region Q2 This is possible by changing the angle of the heat medium pipe 40 within the allowable range of movement of the flange 46 within the accommodation area S. Furthermore, it is also possible to follow changes in the relative position between the casing 2 and the joint portion 13 (14) due to deformation of parts due to temperature changes and pressure changes in the casing 2 after the drying apparatus is put into operation.

[O-ring piping connection airtightness test]
If the heat medium pipe 40 is tilted with respect to the casing 2, excessive displacement will impair the sealing function. did Here, FIG. 8(a) shows a state in which the heat medium pipe 40 is neutral (center line L0), and FIG. 8(b) shows a state in which it is displaced downward by a pipe angle θ7 (center line L6). there is Since the upward displacement is a symmetrical movement of the O-ring 93, the explanation will be redundant and will be omitted. Table 1 shows the test results. Table 2 is a bar graph of Table 1. In the figure, FKM represents fluorine, and VMQ represents silicon O-ring material.

First, the configuration of an embodiment of this test will be described. FIG. 8A shows a vacuum vessel 92 as the casing 2 of the present invention, a cylindrical member 90 as the heat medium pipe 40 of the present invention, and side walls 91, 91 of the projections of the cylindrical member 90. An O-ring 93 is mounted in the seal groove 94 provided. FIG. 8(b) shows the state after the piping angle θ7 is displaced with respect to the wall surface of the vacuum vessel (the O-ring 93 is approximately the central axis). Further, the tip portion of the columnar member 90 that contacts the wall surface 92a of the vacuum container 92 is formed into a curved surface R so as not to hinder the inclination, and also serves as a stopper for the columnar member 90. FIG.
The pipe angle between the casing 2 and the heat medium pipe 40 in the present invention has a movable range of 5° to 7°. Among them, Table 1 shows the results of an airtightness test of the O-ring 93 for the case where the pipe angle θ7 is 5°. The materials of the O-ring 93 in Table 1 are (FKM-70: 4 types D/4D/fluororubber/Viton) FKM-90 (90° FKM/high hardness fluororubber/Viton 90)) and silicone (VMQ-50: After depressurization by a vacuum pump, the valve between the vacuum container and the vacuum pump was closed, and the time for the degree of vacuum to decrease was measured. Here, as an example, the time (seconds, s) from −90 kilopascals (kPa) to −89 kilopascals (kPa) (down 1 kPa) was measured.

As a result of the experiment, as shown in Table 1, No. With FKM-70 of No. 1, when the pipe angle was 0°, it took 100 seconds to drop 1 kPa, whereas No. 2 FKM-70 with a pipe angle of 5°, it took 99 seconds to drop 1 kPa. The difference between 0° and 5° is -1s.
No. With VMQ-70 of No. 3, when the pipe angle was 0°, it took 97 seconds to decrease by 1 kPa, whereas No. 4 VMQ-70 with a pipe angle of 5°, it took 97 seconds to drop 1 kPa. The difference between 0° and 5° is 0s, and there is no difference between the two.
No. With FMK-90 of No. 5, when the pipe angle was 0°, it took 101 seconds to decrease by 1 kPa, whereas No. It took 100 seconds to drop 1 kPa when the piping angle was 5° with FMK-90 No. 6. The difference between 0° and 5° is -1s.
No. When the pipe angle was 0° with VMQ-50 of No. 7, it took 95 seconds to decrease by 1 kPa, whereas No. 7 VMQ-50 took 95 seconds. It took 98 seconds to drop 1 kPa when the pipe angle was 5° with VMQ-50 No. 8. The difference between 0° and 5° is +3s.
From these test results, it has been clarified that the airtightness of the O-ring connection to the pipe can be sufficiently maintained even if the pipe angle is ±5°, and that there is no problem with the sealing function.

[Table 1]

[Table 2]

[Overall Flow of Separating Process and Reassembling Process]
Here, the process of separating the casing 2 and the drying section 10 and the process of reassembling after the separation will be generally described based on the above-described embodiment.

In the drying apparatus of the present invention, as described above, it is desirable to wash the apparatus after the drying process in order to comply with GMP.

Therefore, first, the process of separating the casing 2 from the internal structures (structures to be cleaned) such as the drying section 10 and the drying medium dispersing section 19 arranged in the casing 2 will be described. Prior to the separating step, first, the step of extracting the heat medium and the step of removing the flexible hose are finished.

All the second bolts 70 fastening and fixing the pressing portion 60 to the second flange 56 are removed, and the pressing portion 60 is removed. As a result, the restriction on the axial (horizontal) L movement of the flange portion 46 is lifted, so that the distal end outer peripheral region 40a of the heat medium pipe 40 is fitted into the fitting hole 13a (14a) of the joint portion (joint portion 13, joint portion 14). ), and the heat medium pipe 40 is inserted through the pipe sliding contact hole portion 51 of the first flange 50, the through hole 3a (3b) of the side plate portion 3 of the casing 2, and the pipe loose insertion hole portion 57 of the second flange 56. Remove the This process is repeated to remove all the heat medium pipes 40 connected to all the joints 13 and 14 .
In some cases, there is a step of loosening the first bolt after removing the pressing portion 60 .

By completing the above-described steps, the main shaft 8 attached to the top plate portion 4 can be separated from the side plate portion 3 in a state in which the internal structure such as the drying medium dispersion portion 19 and the drying portion 10 are integrated. For example, by lifting the top plate 4 upward in the vertical direction H to separate the internal structure from the side plate 3, cleaning work can be performed very easily.

Then, after finishing the process of cleaning the internal structures such as the drying medium dispersing section 19 and the drying section 10 , the process moves to the process of reassembling the top plate section 4 , the internal structure and the side plate section 3 . The side plate portion 3 and the bottom plate portion 5 are also separately subjected to a cleaning process.

The top plate portion 4 and the internal structure integrated with the top plate portion 4 that have been suspended are lowered, the internal structure is inserted into the side plate portion 3 from above, and the through holes 3a ( 3b) and the joint portion 13 (14) of each drying plate portion 11 are aligned, and at this time, each through hole 3a (3b) of the side plate portion 3 and the joint portion 13 (14 ), if there is a discrepancy in the circumferential direction, the positions are aligned so that the phases match.
Next, a step of integrally fastening the side plate portion 3 and the top plate portion 4 is performed.

Then, the heat medium pipe 40 is inserted into the casing 2 through the loose pipe insertion hole portion 57 of the second flange 56 , the through hole 3 a ( 3 b ) of the side plate portion 3 of the casing 2 , and the pipe sliding contact hole portion 51 of the first flange 50 . is inserted inside the side plate portion 3 of the .
Then, if there is no deviation in that state and the insertion hole 13a (14a) of the joint portion 13 (14) of the drying plate portion 11 is aligned with the outer peripheral region 40a at the tip of the heat medium pipe 40, the heat medium pipe 40 may be directly inserted into the fitting hole 13a (14a) of the joint portion 13 (14).
However, there is a case where the fitting hole 13a (14a) of the joint portion 13 (14) of the drying plate portion 11 is misaligned with the distal end outer peripheral region 40a of the heat medium pipe 40 due to angular displacement.

In such a case, the angle of the heat medium pipe 40 can be displaced within the allowable range of movement of the flange 46 in the flange accommodating region S of the recessed region Q2, so that the deviation can be adjusted.
At this time, even if an attempt is made to excessively displace the heat medium pipe 40, the flange portion 46 abuts against the second flange 56 and the pressing portion 60 within the recessed region Q2, and functions as a stopper that restricts the movement of the heat medium pipe 40. Therefore, damage and the like can be suppressed.

When reassembling, specifically, when inserting the heat medium pipe 40 into the joint portion 13 (14), in principle, the first bolt 52 must be loosened.
Even in a state where the side plate portion 3, the first flange portion 50, the second flange portion 56 and the pressing portion 60 are bolted and the heat medium pipe 40 is arranged, the joint portion 13 (14) and the heat medium pipe 40 can be aligned in the axial direction (horizontal direction) L of the connection area portion, and the angle of the heat medium pipe 40 can be displaced within the allowable movement range of the flange 46 in the flange accommodation area S of the recessed area Q2. This is because it is also possible to adjust the insertion angle by pressing.

According to the present embodiment, since the configuration as described above is employed, assembly position adjustment can be performed easily and reliably during assembly work after separation. Further, according to the present embodiment, a configuration is adopted in which the drive unit 9 for rotationally driving the main shaft 8 and the like is arranged above the top plate portion 4, and when the internal structure is lifted together with the top plate portion 4, the drive portion 9 It is easy to disassemble and clean because it can also be lifted upwards.

In addition, since the driving part 9 is arranged above the top plate part 4 and the bottom plate part 5, which is easily soiled, is not equipped with a complicated structure such as a shaft seal, there is no need to worry about leakage of the shaft seal. The side plate portion 3 and the bottom plate portion 5 can be washed by immersing them in a washing liquid. Therefore, the cleaning workability of the side plate portion 3 and the bottom plate portion 5 can be improved.

[Heat medium pipe of the second embodiment]
In this embodiment, as shown in FIG. 6, the heat medium pipe 40 is inserted into the through hole 3a (3b) of the side plate portion 3 of the casing 2, and the casing 2 is sandwiched between the first flange 50 and the second flange 56. And, the configuration in which these are fastened with the first bolts 52 is the same as in the first embodiment.
In addition, the sealing means includes an O-ring 55 between the first flange 50 and the casing 2, and an O-ring 42 at the connecting portion between the heat medium pipe 40 and the joint portion 13 (14). It is the same aspect as the first embodiment also in that

A different point is that a seal groove 67 is provided on the inner peripheral side of the first flange 50 instead of providing the seal groove on the outer peripheral side of the heat medium pipe 40 . That is, in the present embodiment, the seal groove 67 is provided on the inner peripheral surface side of the first flange 50 and the O-ring 66 is mounted. It is not in the central part of the inner peripheral surface, but near the joint part 13 (14). As a result, the thickness of the first flange 50 closer to the joint portion 13 (14) is reduced.
The reason why the seal groove 67 is positioned closer to the joint portion 13 (14) of the first flange 50 is to improve the in-machine washability (without disassembly) and to suppress residue build-up. , dents, etc., are not formed. As a result, θ3 is determined by the thick portion of the first flange.

In this way, since there is a difference in wall thickness depending on the formation position of the seal groove in which the O-ring 66 of the first flange 50 is mounted, when connecting the heat medium pipe 40 and the joint portion 13 (14), the heat medium pipe 40 can be inclined by the pipe angle θ3. That is, the O-ring of the sealing means has a movable portion capable of displacing the pipe angle of the heat medium pipe 40 . In this case, the pipe angle θ3 has an allowable range of 5° to 7° as shown in the above test results.

Another difference is that the holding portion 60 in the first embodiment is not provided in the second embodiment. In other words, the second embodiment does not have a stopper function that limits excessive displacement of the heat medium pipe 40, but the stopper function is replaced by connecting the heat medium pipe 40 and the joint portion 13 (14). Alternatively, the stopper function can be substituted by connecting a pipe or a hard hose to the connecting portion of the heat medium pipe opposite to the connecting portion to the joint portion. As a result, the configuration is simplified with a reduced number of parts. In the second embodiment as described above, the heat medium pipe 40 maintains the horizontal direction, and the heat medium of the joint part 13 (14) can be displaced in any of 360 degrees such as the vertical up and down direction, the axial direction, and the rotational direction. Displacement is possible for all movements in which the heat medium pipe 40 is displaced in accordance with the position of the fitting hole 13a (14a) to which the pipe 40 can be connected.

Therefore, it is possible to reduce the cost of the equipment with a simple structure, and since there is no pressing part 60, the heat medium pipe can be easily attached and detached, and the maintainability when disassembling and cleaning the equipment is improved.

[Heat medium pipe of the third embodiment]
In this embodiment, as shown in FIG. 7, the heat medium pipe 40 is inserted into the through hole 3a (3b) of the side plate portion 3 of the casing 2, and the casing 2 is sandwiched between the first flange 50 and the second flange 56. And the structure fastened with these first bolts 52 is the same as in the first embodiment.
Further, in the sealing means, an O-ring 55 is provided between the first flange 50 and the casing 2, an O-ring 65 is provided between the first flange 50 and the heat medium pipe 40, and the heat It is the same aspect as the first embodiment in that an O-ring 42 is also provided at the connecting portion between the medium pipe 40 and the joint portion 13 (14).

This embodiment is also different in that the pressing portion 60 in the first embodiment is not provided as in the second embodiment. In other words, this embodiment also does not have a stopper function for limiting excessive displacement of the heat medium pipe 40, but the stopper function is substituted by connecting the heat medium pipe 40 and the joint portion 13 (14). Alternatively, the stopper function can be replaced by connecting a pipe or a hard hose to the connecting portion of the heat medium pipe opposite to the connecting portion to the joint portion. As a result, the configuration is simplified with a reduced number of parts. In this embodiment as well, the heat medium pipes 40 can be arranged in the upper and lower sides in the vertical direction H, in the axial direction (horizontal direction L), in the rotational direction, etc., while maintaining the horizontal direction L. The heat medium pipe 40 can be displaced in any direction according to the position of the insertion hole 13a (14a) to which the heat medium pipe 40 can be connected. These displacements will be described below with reference to FIG.

7(a) shows the state of the heat medium pipe 40 in the neutral position before displacement with respect to the casing 2, and FIG. After moving slightly toward the upper side of H, the heat medium pipe 40 is fixed to the casing 2 by the first flange 50 and the second flange 56, and the tip of the heat medium pipe 40 is moved downward in the vertical direction H by θ5. lowering. 8(c), after the heat medium pipe 40 is slightly moved downward in the vertical direction H with respect to the side plate portion 3 of the casing 2, the heat medium is separated by the first flange 50 and the second flange 56. The pipe 40 is fixed to the casing 2, and the tip of the heat medium pipe 40 is raised upward in the vertical direction H by θ6. In this case, the pipe angles θ5 and θ6 have an allowable range of 5° to 7° as shown in the above test results.
Moreover, since there is no restriction in either the axial direction or the rotational direction, these displacements are possible.

As described above, only by assembling the heat medium pipe 40 in the casing 2 in a state where the sealing means in which the O-ring is attached to the seal groove of the heat medium pipe 40, the manufacturing accuracy and assembly accuracy of each part can be improved. Since there is no need to raise it, the cost of equipment can be reduced. In addition, since there is no pressing portion 60, the attachment and detachment of the heat medium pipe 40 is facilitated, so that maintainability during disassembly and cleaning of the drying apparatus is improved. In addition, since there is no need to install expensive parts such as expansion joints, the cost of equipment can be reduced.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and variations can be made within the scope of the gist of the present invention described in the claims. Change is possible.

[Another embodiment of the blade of the dryer]
In the embodiment shown in FIG. 3, the blade part has a long blade shape formed with a predetermined length in the length direction of the arm part. An embodiment of is described below with reference to FIGS. 9 and 10. FIG.

The blade portion 181 in the embodiment shown in FIGS. 9 and 10 is assumed to consist of a plurality of short (strip-shaped) blades 181a. In this embodiment, a plurality of strip-shaped blade portions 181a are arranged on the arm portion 180 at predetermined intervals and at a predetermined inclination angle. The strip-shaped blade portion 181 a is formed in a rectangular flat plate shape and arranged on the drying plate portion 11 .
Further, in this embodiment, the strip-shaped blade portion 181a is detachable from the arm portion 180, and the arrangement inclination angle is also adjustable.

For example, each of the strip-shaped blades 181a of the first scraping guide portion 18a, the third scraping guide portion 18c, and the fifth scraping guide portion 18e has one end attached to the arm portion 180 and the other end thereof. are disposed so as to be inclined toward the outer diameter direction of the drying plate portion 10a.
Specifically, the arm portions 180 of the first scraping guide portion 18a, the third scraping guide portion 18c, and the fifth scraping guide portion 18e, and the scraping of the strip-shaped blade portions 181a It is arranged in an inclined manner so that the angle a1 formed by intersecting with the surface 181b is an acute angle (see FIG. 11(a)). An arrow R2 in the drawing indicates the rotation direction of each strip-shaped blade 181a of the first scraping guide portion 18a, the third scraping guide portion 18c, and the fifth scraping guide portion 18e.

Further, for example, each of the strip-shaped blades 181a of the second scraping guide portion 18b, the fourth scraping guide portion 18d, and the sixth scraping guide portion 18f has one end side attached to the arm portion 180 and the other scraping guide portion 181a. The end side is arranged so as to be slanted toward the inner diameter direction of the drying plate portion 10a.
Specifically, the arm portions 180 of the second scraping guide portion 18b, the fourth scraping guide portion 18d, and the sixth scraping guide portion 18f, and the scraping of the strip-shaped blade portions 181a It is arranged in an inclined manner so that the angle a2 formed by intersecting with the surface 181b is an acute angle (see FIG. 11(b)). An arrow R2 in the drawing indicates the rotation direction of each strip-shaped blade 181a of the second scraping guide portion 18b, the fourth scraping guide portion 18d, and the sixth scraping guide portion 18f.

The operation in this other embodiment is the same as in the above embodiment. The scraping surfaces 181b of the strip-shaped blades 181a of the first scraping guide portions 18a, 18a, 18a, and 18a are being dried (on the heat transfer surface) and rotating in synchronization with the rotary plate portion 20. are sequentially guided in the outer diameter direction of the drying plate portion 11, and fall from the outer diameter side of the drying plate portion 11 onto the drying plate portion 11 of the second drying portion 10b located below (Fig. 9 , see FIGS. 10 and 11(a)).
Then, the drying medium dropped onto the drying plate portion 11 of the second drying portion 10b is transferred to the scraping surfaces 181b of the strip-shaped blade portions 181a of the second scraping guide portions 18b, 18b, 18b, and 18b. along the inner diameter direction of the drying plate portion 11, and the drying of the third drying portion 10c located below via the drying medium drop hole portion 110 (see FIG. 9) on the inner diameter side of the drying plate portion 11. It drops onto the plate portion 11 (see FIGS. 9, 10 and 11(b)). This operation is alternately repeated from the third drying section 10c to the sixth drying section 10f, and the dry medium that has been dried is discharged from the drying medium drop hole section 110 of the sixth drying section 10f through the shooter 17 and the discharge section 6. It is guided to the outside of the device (see FIG. 9).
The shape of the strip-shaped blade portion 181a, the number of strip-shaped blades 181a, the arrangement interval, the inclination angle, etc. can be changed within the scope of the present invention according to the specifications.

The drying apparatus of the present invention can be used to dry chemical raw materials such as activated carbon, sulfur, ammonium carbonate, lignin sulfate, synthetic resin, plastic powder, nylon, ABS resin, agricultural chemical raw materials, pharmaceuticals, sugar, yeast, and citric acid. It is also widely available for foods such as

1 Frame 2 Casing 3 Side plate 3a Through hole 3b Through hole 4 Top plate 5 Bottom plate 6 Discharge part 7 Column 8 Main shaft 9 Drive part 10 Drying part 11 Drying plate part 12 Heat medium storage part 13 Joint part (inflow)
13a Fitting hole 14 Joint part (exhaust)
14a Fitting hole 18 Scraping guide part 19 Drying medium dispersing part 40 Heat medium pipe 40a Front end outer peripheral region 40b Central outer peripheral region 40c Rear end outer peripheral region 41 Seal groove 42 O-ring (sealing means)
43 Seal mounting projection 44 Seal groove 45 Side wall 46 Flange 47 Surrounding surface 48 Surrounding surface 49 Upper end surface 50 First flange 51 Piping sliding contact hole 52 First bolt 53 Connecting hole 54 Annular seal groove 55 O-ring (sealing means )
56 second flange 57 loose pipe insertion hole portion 58 connecting hole portion 59 second connecting hole portion 60 pressing portion 61 end portion 62 second loose pipe insertion hole portion 63 third connecting hole portion 64 heat medium pipe holding portion 65 O-ring (sealing means)
66 O-ring (sealing means)
67 Seal groove 70 Second bolt 80 Movable part 90 Cylindrical member 91 Side wall 92 Vacuum vessel 93 O-ring (sealing means)
94 Seal groove 180 Arm portion 181 Blade portion H Vertical direction L Axial direction Q Recessed region Q2 Recessed region R Connection gap R
S flange accommodation area

Claims (6)

A drying device that is installed in a casing in a multi-tiered manner in the vertical direction and that dries the drying medium falling from above in the vertical direction on a drying unit that is heated via a heating medium ,
The drying section is
a drying plate section configured in multiple stages with a gap from the first drying section to the n-th drying section;
a heating medium containing portion on the lower surface of each drying plate portion so that the heat medium supplied from the heating medium supply pipe arranged outside the casing is heat-transferred to the entire area of each drying plate portion;
moreover,
a through hole provided in the casing;
a joint portion provided in communication with the heat medium containing portion;
a heat medium pipe inserted through the through hole and connected to the joint to flow a heat medium;
a heat medium pipe holding portion including a first flange and a second flange that insert the heat medium pipe at the position of the through hole and attach the casing by sandwiching it from the inside and outside,
The heat medium pipe is formed in a single substantially cylindrical shape with the flow path of the heat medium,
The first flange has a pipe sliding contact hole with which the outer peripheral surface of the heat medium pipe is in sliding contact, and an O-ring is provided in the sliding contact region between the pipe sliding contact hole and the outer peripheral surface of the heat medium pipe. a moving part having a sealing means of
The second flange has an inner peripheral surface with a diameter larger than the outer diameter of the heat medium pipe, thereby forming a gap between the second flange and the outer peripheral surface of the heat medium pipe, and inserting it through the through hole. Having a first fastening portion that adjusts fastening to the casing by connecting the first flange with bolts,
The first flange and the second flange have a first displacement mechanism capable of displacing the vertical position of the heat medium pipe up and down by loosening the first fastening portion,
Even after adjusting the vertical position of the heat medium pipe by tightening the first fastening portion, the second flange can change the position of the heat medium pipe in accordance with the position change of the joint portion. A drying device, characterized in that it has a second change mechanism . The drying plate portion is characterized in that the outer diameter of each plate portion is alternately small and large as compared with the outer diameter of the immediately lower plate portion. A drying apparatus according to claim 1. A recessed region having a larger diameter than the through hole is formed on the inner surface side of the casing so as to surround the through hole,
When the inner diameter of the recessed region is D1 and the outer diameter of the first flange is D2,
having a relationship of D1>D2,
3. The drying apparatus according to claim 1 , wherein the heat medium pipe can be displaced in the vertical direction within the range of the difference between D1 and D2 . a pressing portion fastened and fixed to the second flange;
an annular collar portion accommodated in an annular collar portion accommodation area continuously formed in the circumferential direction between the inner surface of the pressing portion and the outer surface of the second flange;
The flange portion is continuously protruded in a circumferential direction of the outer diameter of the heat medium pipe,
Within the collar accommodation area,
The flange portion is displaceable according to the position of the fitting hole of the joint portion,
4. The drying apparatus according to any one of claims 1 to 3 , wherein movement of said heat medium pipe is restricted by contact of said collar portion with said second flange or said pressing portion . At the joint portion where the tip portion of the heat medium pipe is inserted into the joint portion,
At least one or more O-rings are provided for sealing the heat medium pipe and the joint,
5. The drying apparatus according to claim 1, wherein a gap is provided so that the tip of said heat medium pipe does not abut on the socket of said joint portion . A displacement adaptation method for a heat medium pipe of a drying device for inserting a heat medium pipe for flowing a heat medium into a joint portion of a drying unit installed in a casing for drying an object to be dried, comprising:
A temporary tightening step in which the first flange on the inner side of the casing and the second flange on the outer side of the casing are attached to the casing to the extent that they do not fall;
The heat medium pipe is adapted to the position of the fitting hole of the joint portion, and as the first flange is vertically displaced along the side plate portion of the casing, the entire heat medium pipe is displaced to displace the heat. a step in which the medium pipe is inserted into the fitting hole of the joint;
retightening the first flange and the second flange to the casing for assembly and fixation;
Even after the retightening step, the heat medium pipe adapts to the displacement of the joint portion and the connection fitting hole, and the gap between the outer peripheral surface of the heat medium pipe and the outer diameter of the heat medium pipe A displacement adapting method for a heating medium pipe of a drying apparatus, comprising: a movable portion having sealing means consisting of an O-ring in the circumferential direction;

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