JP5486186B2 - Valve and stirring device provided with the valve - Google Patents

Description

  The present invention relates to a valve and a stirring device equipped with the valve. More specifically, the present invention relates to a stirring device that includes a container for storing a stirring object and stirs the stored material, and a valve for opening and closing a discharge port of the stirring device.

  As an example of the agitation device described above, a filtration drying device as disclosed in Patent Document 1 is known. As shown in FIG. 4, this filtration drying apparatus 51 has a container 52 having a bell-shaped housing shape. A rotating shaft 53 is inserted into the container from above along the central axis of the container 52, and a stirring blade 54 is attached to the lower end of the rotating shaft 53. A driving device 55 for rotating the rotary shaft 53 is installed at the upper end of the container 52. A filter medium 56 is installed at the bottom of the container 52. A jacket 57 through which the heat medium circulates is formed on the outer peripheral surface of the side portion of the container 52. A processing object (also referred to as a processing object) M such as slurry in the container 52 is stirred by the stirring blade 54 while being heated by the heat medium. In the process, the filtrate is discharged from the drainage outlet 58 at the bottom.

  A discharge port 59 for discharging the processed material M is formed on a side surface near the bottom of the container 52, and a valve 60 is installed in the discharge port. FIG. 5 is a view taken along line VV in FIG. As is apparent when referring also to FIG. 5, the jacket 57 cannot be formed in this portion because of the formation of the discharge port 59 and the installation of the valve 60. That portion of the jacket 57 has a cutout shape 57a. Therefore, even if the heat medium is circulated through the jacket 57, the portion of the inner surface of the container 52 where the valve 60 is installed may not be heated as required. As a result, the contents facing the valve 60 portion on the inner surface of the container 52 become viscous with moisture remaining without being sufficiently dried. On the other hand, the stirring blade 54 is dimensioned so that a slight gap is formed without its tip contacting the inner surface of the container 52. Therefore, a thin layer of contents that are not stirred may be formed on the inner surface of the container 52. If it is sufficiently dried, this thin layer will collapse and be mixed well, but there is a risk that the processed product will remain in the form of a film in the part where drying is insufficient.

Thus, when the inner surface of the container 52 is not heated uniformly, the function of the stirring device may not be sufficiently exhibited.
JP 2007-032778 A

  The present invention has been made to solve the above-described problems, and the temperature of the portion where the valve is installed on the inner peripheral surface of the container of the stirring device can be adjusted to the same temperature as the other portions. An object of the present invention is to provide a stirrer and to provide a valve suitably used for the stirrer.

The valve of the present invention is provided in a container and has a valve seat in which a fluid passage and a valve seat surface are formed on the inner diameter side , and closes the fluid passage by contacting the valve seat surface, and is separated from the valve seat surface. And a valve body for opening the fluid passage, and a valve body internal cavity for circulating a temperature adjusting fluid is formed in the valve body, and the valve body communicates with the valve body internal cavity. The valve body fluid supply passage and the valve body fluid discharge passage are connected to the valve body so that the fluid in the internal cavity of the valve body can exchange heat with the contents of the container. The internal cavity is separated from the outside by a single end plate portion on the front end face of the valve body .

  According to this configuration, the temperature of the valve body can be adjusted by circulating the temperature adjusting fluid in the internal cavity of the valve body. Therefore, if this valve is used, for example, in an apparatus having a container in which a heating jacket is formed (for example, a filtration drying apparatus), the valve mounting portion of the container can be set to the same temperature as the jacket forming portion. Become. As a result, the side peripheral surface in the container can be brought to a substantially uniform temperature, so that the contents stored in the container can be effectively dried.

  The valve seat is formed in an annular shape, a valve seat internal cavity for circulating a temperature adjusting fluid is formed in the valve seat, and a valve seat fluid supply passage communicating with the valve seat internal cavity and the valve seat A fluid discharge passage can be connected to the valve seat. If comprised in this way, it will also become possible to adjust the temperature of the valve seat generally arrange | positioned around the said valve body. As a result, the processing object in the container can be more effectively dried.

A drive device that drives the valve body to advance and retreat in order to open and close the fluid passage is connected to the rear end surface side of the valve body, and the side circumferential surface of the valve body is formed in a tapered shape that decreases in diameter from the rear end to the front end. It can Rukoto that form. By doing so, it can be expected that the temperature of the front end face of the valve body due to the action of the temperature adjusting fluid becomes uniform.

A cylindrical valve housing; and a lid member disposed at the rear end of the valve housing via a hinge so as to be openable and closable.
The annular valve seat is installed so as to constitute a peripheral edge of the front end of the valve housing;
The drive device is attached to the lid member, and the output shaft thereof is arranged in parallel to the central axis of the valve housing and connected to the rear end of the valve body,
The valve body fluid supply passage and the valve body fluid discharge passage are configured from a pipe extending in parallel with the output shaft of the drive device and penetrating the lid member, and configured to be able to advance and retreat together with the valve body.
The valve body, the driving device, the valve body fluid supply passage, and the valve body fluid discharge passage can be configured to be capable of being opened and closed integrally with the lid member.

The stirring device of the present invention comprises:
Temperature adjustment of container contents formed on a container having a cylindrical or conical side part, a stirring blade rotatably provided around the central axis of the container, and at least an outer peripheral surface of the side part A stirring device comprising: a jacket in which the fluid for circulation is circulated; a discharge port for discharging the contents contained in the container formed on the side portion; and a valve for opening and closing the discharge port,
This valve is one of the above-mentioned valves,
The front end surface of the front end surface of the valve body is exposed inside the container.

  The front end surface of the valve seat is exposed inside the container, and the jacket is communicated with the valve seat internal cavity via the valve seat fluid supply passage and the valve seat fluid discharge passage. The temperature adjusting fluid may be circulated through the jacket and the valve seat internal cavity.

  According to the valve of the present invention, the temperature of the valve body can be adjusted by the temperature adjusting fluid. Specifically, heating and cooling are possible. Therefore, if it is used in an apparatus that requires a stirring target in a container to be maintained at a predetermined temperature, such as a filtration drying apparatus, it is possible to suppress uneven temperature on the inner surface of the container.

  Hereinafter, an embodiment of a valve according to the present invention attached to a filtration drying apparatus which is a kind of stirring apparatus will be described with reference to the drawings.

  FIG. 1 is a front view of a valve 1 according to an embodiment of the present invention viewed in the horizontal direction. FIG. 2 is a partial cross-sectional view of the valve 1 of FIG. 1 as viewed from above to below.

  As shown, the valve 1 includes a cylindrical valve housing 2. The front end 2a of the valve housing 2 is fixed to the side peripheral surface of the filtration drying device 51 (FIG. 4). Since the filter drying device 51 itself has already been described, the description thereof is omitted here. Connected to the lower end of the valve housing 2 is a chute 3 for discharging the agitated material in the container 52. An annular valve seat 4 is attached to the front end portion 2a of the valve housing 2 substantially coaxially. The inner diameter side of the valve seat 4 constitutes a discharge passage for the agitated product in the container 52. This discharge passage corresponds to the discharge port 59 of the container 52. The lower end of the discharge port 59 is made to coincide with the bottom surface in the container 52 (see FIGS. 1 and 3). The inner peripheral surface of the valve seat 4 constituting the valve seat surface 4a (seal surface) is formed in a taper shape whose diameter increases toward the outside of the container 52, in other words, downstream in the flow direction of the object. ing. As will be described later, an annular inner cavity 14 for circulating a temperature adjusting fluid is formed in the valve seat 4. In the case of the filter drying device 51, a heating medium is employed as the temperature adjusting fluid.

  The rear end 2b of the valve housing 2 can be opened and closed by a lid member 6 attached thereto via a hinge 5. The lid member 6 can be opened and closed manually. A driving device 7 for opening and closing the valve 1 is attached to the rear outer surface of the lid member 6. In the present embodiment, a hydraulic cylinder is employed as the driving device 7, but the present invention is not limited to this. A piston rod 7 a that is an output shaft of the hydraulic cylinder 7 penetrates the center hole 6 a of the lid member 6 so as to be able to advance and retreat, and enters the valve housing 2. A seal member (not shown) that seals the piston rod 7a so as to be able to advance and retract is installed in the center hole 6a, and a bellows 8 is attached to the piston rod 7a.

  A substantially truncated conical valve body 9 is coaxially attached to the tip of the piston rod 7a. The valve body 9 is located in the valve housing 2 and is coaxially arranged with respect to the valve seat 4. The side peripheral surface 9 a of the valve body 9 has a tapered shape complementary to the inner peripheral surface of the valve seat 4. The side peripheral surface 9a constitutes a seal surface that abuts the valve seat surface 4a and closes the discharge passage. A seal member 13a such as an O-ring for sealing between the valve seat surface 4a and the valve seat surface 4a is mounted on the seal surface 9a of the valve body 9. Further, a seal member 13 b for sealing between the rear end surface of the valve seat 4 is installed at a collar portion at the rear end of the valve body 9. When the piston rod 7a advances by driving the hydraulic cylinder 7, the valve element 9 enters the valve seat 4 and closes by contacting the valve seat surface 4a (indicated by a two-dot chain line in FIG. 2). When the piston rod 7a moves backward, the valve body 9 is opened away from the valve seat surface 4a (shown by a solid line in FIG. 2).

  The valve body 9 is formed with an internal cavity 19 for circulating the heating medium. A fluid supply pipe 11 and a fluid discharge pipe 12 for circulating a heating medium in the internal cavity 19 are connected to the rear end portion of the valve body 9. As a method for connecting to the valve body 9, a threaded through hole for connection on the back surface of the valve body may be screwed after a seal member such as a seal tape is attached. Both the fluid supply pipe 11 and the fluid discharge pipe 12 extend in parallel with the piston rod 7a and penetrate through a through-hole 6b formed in the lid member 6 so as to advance and retreat. A seal member 15 such as an O-ring for sealing between the fluid supply pipe 11 and the fluid discharge pipe 12 is attached to each through hole 6b via a bush 15a. Flexible tubes 11a and 12a are connected to the rear ends of the fluid supply pipe 11 and the fluid discharge pipe 12 projecting outward from the through hole 6b. The tube 11a for the fluid supply pipe 11 is connected to a heating medium supply source (not shown). The tube 12a of the fluid discharge pipe 12 is also connected to the supply source, and is configured to return the heating medium to the supply source. When the piston rod 7a advances and retracts the valve body 9 by driving the hydraulic cylinder 7, the fluid supply pipe 11 and the fluid discharge pipe 12 are integrated with the valve body 9 while flexing or extending the flexible tubes 11a and 12a. Moving.

  In the present embodiment, one fluid supply pipe 11 and one fluid discharge pipe 12 are provided, but the present invention is not limited to this configuration. Either one or both may be two or more. In the present embodiment, the fluid supply pipe 11 and the fluid discharge pipe 12 are formed of a rigid material such as metal, but such a limitation is not necessary. A flexible tube may be used when there is no risk of being affected by the processed product in the container 52 or the temperature. With this configuration, unlike the fluid supply pipe 11 and the fluid discharge pipe 12, there is no need to allow the through-hole 6b of the lid member 6 to advance and retreat, and it is not necessary to attach the seal member 15 to the through-hole 6b. .

  In order to heat the valve housing 2 from the outside, a heating medium circulation pipe (not shown) may be stretched around the outer surfaces of the valve housing 2 and the chute 3 in some cases. At this time, any one of the flexible tubes 11a and 12a may be connected to the heating medium circulation pipe. By doing so, the heating medium to be circulated in the heating medium circulation pipe can be shared for the valve body 9.

  As described above, the valve body 9, the valve body drive device 7, the fluid supply pipe 11, and the fluid discharge pipe 12 are directly or indirectly assembled to the lid member 6. These components move together with the swing of the lid member 6 that opens and closes the rear end of the valve housing 2. When the lid member 6 is opened, the lid member 6 may be swung after the valve body 9 is moved backward by the driving device 7 (position indicated by a solid line in FIG. 2).

  As shown in FIGS. 1 and 2, the internal cavity 19 is separated from the outside by a single plate portion 9 b at the front end portion of the valve body 9. Further, the front end surface of the valve body 9 constitutes the same surface as the inner peripheral surface of the container 52 (so-called flushing). The fluid circulated in the internal cavity 19 of the valve body 9 transfers heat to the filling inside the container 52 through the plate portion 9b. The hollow valve body 9 is formed, for example, by integrally forming a back surface portion and a tapered side peripheral portion by cutting or casting, and thereafter, a single plate member (the above-mentioned plate member constituting the front end surface portion with respect to the formed product) It may be fixed by welding or the like to one plate portion 9b. Alternatively, the front end surface portion and the tapered side peripheral portion may be integrally formed, and then the plate material constituting the back surface portion may be fixed to the formed product. Alternatively, the front end surface portion, the side peripheral portion, and the back surface portion may be formed separately, and these may be assembled so as to be a finished product (valve element) by welding or the like sequentially.

  On the other hand, the valve seat 3 is an annular member in which a groove 16 is formed along the circumferential direction as shown in the drawing and the cross section has a U-shape. The open side of the groove 16 is in close contact with the outer peripheral surface of the container 52. Thereby, the groove 16 constitutes the internal cavity 14. That is, the side peripheral wall of the container constitutes a part of the valve seat 4. The fluid circulated in the internal cavity 14 transfers heat to the filling in the container 52 through a portion of the container side peripheral wall facing the valve seat 4.

  In this embodiment, although the annular member of a U-shaped cross section is used as the valve seat 4, it is not limited to this structure. For example, by fixing an annular flat plate so as to close the groove 16, a member in which an annular tunnel in which a heat medium circulates instead of the groove is formed may be used. If such a shape is adopted, the side peripheral wall of the container 52 does not need to be a component part of the valve seat. A valve seat mounting hole may be formed in the side peripheral wall of the container 52, and the valve seat may be inserted into the mounting hole for mounting.

  FIG. 3 shows a range where the valve 1 is mounted on the inner peripheral surface of the container 52. As shown in FIG. 3, the jacket 57 (see also FIGS. 4 and 5) is not formed in the range where the valve 1 is attached. The jacket 57 is formed with a semicircular cutout 57a. However, as described above and as shown in FIG. 3, the internal cavity 19 of the valve body 9 and the internal cavity 14 of the valve seat 4 are located in the range. A heating medium circulates there. Therefore, if substantially the entire side peripheral surface of the container is covered with the jacket, the same heating effect can be obtained.

  For supplying and discharging the heating medium to and from the internal cavity 14 of the valve seat 4, a dedicated supply pipe and discharge pipe may be connected to, for example, the lower end of the valve seat. However, in this embodiment, the internal cavity 14 of the valve seat 4 is communicated with the jacket 57 through the following communication hole 17. Therefore, the heating medium supplied to the jacket 57 also circulates in the internal cavity 14 of the valve seat 4. Specifically, the jacket 57 is brought into close contact with the outer peripheral surface of the substantially upper half of the valve seat 4, and a plurality of communication holes 17 for communicating the internal cavity 14 and the jacket 57 are formed in the outer peripheral wall 4 b of the valve seat 4. doing. The communication hole 17 constitutes a fluid supply passage and a fluid discharge passage. Of course, instead of such a configuration, the structure of the jacket remains as it is, that is, a shape in which the end portion of the jacket (the cutout portion 57a of the jacket 57 shown in FIG. 5) is slightly separated from the outer peripheral wall 4b of the valve seat 4. And And a communication hole may be formed also in the part of the jacket corresponding to the communication hole 17 of the outer peripheral wall 4b of the valve seat 4, and both the communication holes may be connected by a pipe or the like.

  In the embodiment described above, the filtration drying device is exemplified as the stirring device, but the application of the valve of the present invention is not limited to the filtration drying device. That is, it is not limited to the apparatus which heats the process target object inside a container. For example, the present invention can also be applied to a stirring device that cools an object to be processed inside a container, such as a cooling hopper used in a subsequent process of a heat dryer. In this case, the cooling medium is circulated in the internal cavities 14 and 19 of the valve seat 4 and the valve body 9. Further, the shape of the container to which the valve 1 is attached is not limited to one having a cylindrical side portion such as a bell shape. A conical shape may be sufficient, and a drum shape, a drum shape, etc. may be sufficient.

  As described above, according to the present invention, the temperature of the valve body can be adjusted by the temperature adjusting fluid. Specifically, heating and cooling are possible. Therefore, it is suitable for a device that is required to maintain the stirring target in the container at a predetermined temperature, such as a filtration drying device.

It is side surface sectional drawing which shows one Embodiment of the valve | bulb which concerns on this invention. FIG. 2 is a plan sectional view of the valve of FIG. 1. It is an expanded view which shows the range in which the valve | bulb of FIG. 1 is attached among the internal peripheral surfaces of the container of the filtration drying apparatus which is one Embodiment of the stirring apparatus of this invention. It is front sectional drawing which shows an example of the filtration drying apparatus which can apply the valve | bulb of this invention. It is a VV arrow directional view of Drawing 4, and is a development view of the range where the conventional valve is attached among the outer peripheral surfaces of the container of a filtration drying device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Valve 2 ... Valve housing 3 ... Chute 4 ... Valve seat 5 ... Hinge 6 ... Lid member 7 ... Hydraulic cylinder 8 ... Bellows 9 ... Valve body 11 ... Fluid supply pipe 12 ... Fluid discharge pipes 13a, 13b ... ) Seal member 14 ... Internal cavity (of valve seat) 15 ... Seal member (of fluid supply pipe and fluid discharge pipe) 16 ... Groove 17 ... Communication hole 51 ... Filtration drying device 52 ... Container 57 ... Jacket M ... Processed material

Claims (6)

A valve seat provided in the container and having a fluid passage and a valve seat surface formed on the inner diameter side;
A valve body for closing the fluid passage by contacting the valve seat surface and opening the fluid passage by separating from the valve seat surface;
A valve body internal cavity for circulating a temperature adjusting fluid is formed in the valve body, and the valve body fluid supply passage and the valve body fluid discharge passage communicating with the valve body internal cavity are connected to the valve body. Connected to the body ,
The valve body internal cavity is separated from the outside by a single end plate at the front end surface of the valve body so that the fluid in the valve body internal cavity can transfer heat to and from the contents of the container . valve.   The valve seat has an annular shape, and a valve seat internal cavity for circulating a temperature adjusting fluid is formed. The valve seat fluid supply passage communicated with the valve seat internal cavity and the valve seat The valve according to claim 1, wherein a fluid discharge passage is connected to the valve seat. A drive device that drives the valve body to advance and retreat is connected to the rear end surface side of the valve body,
The side peripheral surface of the valve body has a tapered shape that is condensation diameter toward the front end from the rear end, according to claim 1 or 2 valve according. A cylindrical valve housing;
A lid member disposed at the rear end of the valve housing so as to be openable and closable via a hinge;
The annular valve seat is installed so as to constitute a peripheral edge of the front end of the valve housing;
The drive device is attached to the lid member, and its output shaft extends parallel to the central axis of the valve housing and is connected to the rear end of the valve body;
The valve body fluid supply passage and the valve body fluid discharge passage are configured by pipes that extend in parallel with the output shaft of the drive device, pass through the lid member, and can advance and retreat with the valve body,
The valve according to claim 2, wherein the valve body, the driving device, the valve body fluid supply passage, and the valve body fluid discharge passage are capable of being opened and closed integrally with the lid member. Temperature adjustment of container contents formed on a container having a cylindrical or conical side part, a stirring blade rotatably provided around the central axis of the container, and at least an outer peripheral surface of the side part A stirring device including a jacket in which a fluid for circulation is circulated, a discharge port for discharging the contents contained in the container formed on the side portion, and a valve for opening and closing the discharge port,
This valve is the valve according to any one of claims 1 to 4,
A stirring device in which a front end surface of the valve body is exposed inside the container.   A front end surface of the valve seat is exposed inside the container, and the jacket communicates with the valve seat internal cavity via the valve seat fluid supply passage and the valve seat fluid discharge passage. The stirring device according to claim 5, wherein the temperature adjusting fluid is circulated between the jacket and the valve seat internal cavity.

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