JP2008002510A - Pressure vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the time required to open and close a lid of a pressure vessel by simplifying the opening and closing. <P>SOLUTION: The pressure vessel 12 comprises a vessel main body 32 having a closed one end of a nearly circular cylinder, and the lid 34 to seal the opening of the vessel main body by being fitted in the cylinder inside of an end at the opening side of the vessel main body 12. The lid 34 is locked with two pins 36 to lock the lid by penetrating the vessel main body and the lid, keeping from the central portion of the lid in the surface intersecting the axis line of the nearly circular cylinder of the vessel main body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pressure vessel that has a high pressure inside and performs predetermined processing inside.

  There is known a pressure vessel that has a high pressure inside and performs a predetermined chemical reaction, pressure processing, and the like. Patent Document 1 listed below describes an apparatus for filling a container with high-temperature water and heating and pressurizing a processing object stored in the container at a high pressure. The pressure vessel of this apparatus has a container body having a shape in which one end of a substantially cylinder is closed, and a lid for sealing the opening of the container body on the inner surface of the cylinder at the open end of the container body. A single pin is passed through the container body and the lid to lock the lid.

Japanese Utility Model Publication No. 4-44358

  In the device described in the above-mentioned publication, there is one pin that locks the lid, and penetrates the center of the lid. However, when a shaft or a tube passing through the center of the lid is passed through in order to make some access to the inside of the container, interference occurs with the locking pin. For example, in order to stir the contents of the container, when a stirring shaft having a stirring blade at the tip is passed through the center of the lid, interference with the pin occurs at the center of the lid.

  According to the present invention, in a pressure vessel, a lid to which a structure such as a shaft or a tube is added can be locked with a pin.

  The pressure vessel according to the present invention has two pins penetrating the vessel body and the lid. By disposing the two pins so as to be removed from the central portion, a structure such as a shaft or a tube can be disposed in the central portion of the lid.

  For example, a stirring shaft having a stirring blade for stirring the contents of the container can be passed through the center of the lid.

  In addition, in order to supply power to the heater disposed inside the container, a contact is provided on each of the container body and the lid, and these contacts can be connected and disconnected by the movement of the lid along the axial direction of the container. It has become.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a carbon dioxide supercritical apparatus 10 to which the pressure vessel of the present embodiment is applied. The carbon dioxide supercritical apparatus is used to perform processing such as extraction, reaction, crystallization, decomposition, synthesis, and degreasing of substances.

  The carbon dioxide supercritical apparatus 10 includes a pressure vessel 12 in which a predetermined process is performed with carbon dioxide in a supercritical state, a liquefied carbon dioxide container 14 that stores liquefied carbon dioxide supplied to the pressure vessel, and a carbon dioxide supercritical state that has been processed. A collection tank 16 for collecting the solution is included. The liquefied carbon dioxide stored in the liquefied carbon dioxide container 14 is pressurized by the pump 17 and sent to the heater 18, and after being pressurized, is supplied to the pressure container 12 through the supply pipe 20. The pressure vessel 12 is provided with an in-container heater 22 that heats the contents of the pressure vessel and an agitator 24 that agitates the contents. The solution after the treatment is led to the collection tank 16 through the discharge pipe 26, where carbon dioxide is vaporized and separated from the treated product. The separated carbon dioxide is cooled by the cooler 28, further compressed by the compressor 30 and liquefied, and collected in the liquefied carbon dioxide container 14.

  The pressure vessel 12 has a substantially cylindrical shape, and includes a container main body 32 having a shape in which one end of the cylinder is closed, and a lid 34 that fits into the opening of the open end of the container main body 32 and seals the inside. A pin 36 penetrates the container body 32 and the lid 34 from the side of the container body to lock the lid 34. When opening the lid 34, the pin 36 is pulled out to the side, the lock is released, and the lid 34 is pulled upward.

  FIG. 2 is a view showing the structure of the pressure vessel 12. An opening 38 is formed in the container body 32, and the lid 34 is fitted here to seal the container body 32. The lid 34 is provided with a stirrer attachment hole 39 to which the stirrer 24 is attached along the axis at the center thereof. Further, a supply hole 40a and a discharge hole 40b to which the supply pipe 20 and the discharge pipe 26 are attached are provided so as to sandwich the stirrer attachment hole 39. Two lid through holes 42 are formed so as to avoid the central region 41 provided with the stirrer mounting hole 39, the supply hole 40a, and the discharge hole 40b. The lid through hole 42 is formed in a plane that intersects, preferably orthogonally intersects with the cylindrical axis of the container body 32 and penetrates the lid 34, avoiding the central region 41.

  A container through hole 44 is formed in the vicinity of the opening 38 of the container body 32 at a position corresponding to the lid through hole 42 when the lid 34 is fitted. In FIG. 2, the lid 34 is lowered toward the opening 38 of the container body, and when the positions of the lid through hole 42 and the container through hole 44 are aligned, two pins provided corresponding to the through holes 42, 44. 36 is inserted from the side to lock the lid 34. When opening the container, conversely, the two pins 36 are removed from the through holes 42 and 44 and the lid 34 is pulled upward. In such a container opening / closing operation, the lid 34 moves relative to the container body 32 only in the direction of the cylindrical axis of the container body.

  A seal structure is provided on the periphery of the surface of the lid 34 facing the container. A taper surface 46 is provided on the side surface in the vicinity of the lower surface of the lid 34 in FIG. 2, and a backup ring 48 having an inclined surface corresponding to the inclination of the taper surface, an O-ring 50, and a stop plate 52 are provided. The stop plate 52 is fixed to the lower surface of the lid 34 by 4 to 8 stop screws 53.

  FIG. 3 is a cross-sectional view showing details of the seal structure between the container body 32 and the lid 34. As described above, the lid 34 is provided with the tapered surface 46. A backup ring 48 is disposed at a position corresponding to the tapered surface 46. The backup ring 48 is supported by the stopper plate 52 via the O-ring 50. The cross section of the backup ring 48 is a triangle having an inclined surface corresponding to the tapered surface 46. The backup ring 48 moves upward in FIG. 3 when it receives pressure inside the container. At the same time, under the action of the tapered surface 46, it spreads outward and comes into close contact with the inner wall surface of the container body 32, thereby preventing the O-ring 50 from receiving the internal pressure and entering the gap between the container body 32 and the lid 34. . A gap between the container body 32 and the lid 34 is sealed by an O-ring 50.

  FIG. 4 relates to a configuration for supplying power to the in-container heater 22. The state shown in FIG. 4 shows the process of inserting the lid 34 into the container body 32. In the container main body 32, a planar container heater 22 is disposed along the inner wall surface. The in-container heater 22 generates heat when electric power is supplied. A bracket 56 that supports the contact socket 54 is fixed to the upper end of the heater 22. A contact pin 58 is provided on the lower surface of the lid 34 so as to face the contact socket 54. A power line 60 for supplying power is connected to the contact pin 58. The power line 60 passes through the upper portion of the lid through the wiring hole 62 provided in the central region 40, that is, the portion where the lid through hole 42 is avoided. In the vicinity of the opening at the top of the wiring hole 62, a packing 64 and a packing presser 66 for pressing the packing 64 are arranged for sealing. The contact socket 54 and the contact pin 58 can be connected and disconnected only by the movement of the lid 34 in the cylindrical axis direction of the container.

  FIG. 5 is a cross-sectional view showing the configuration of the agitator 24. The stirrer 24 is fixed to the center of the lid 34, and a stirring shaft 70 having a stirring blade 68 at the tip for stirring the contents of the container is disposed so as to be coaxial with the axis of the pressure vessel 12. The case 72 of the stirrer 24 has a tube shape and is coupled to the lid 34 by a screw portion 74. A gasket 76 is disposed at the front end (lower end in the figure) of the case 72 and seals the inside of the pressure vessel 12. A stirring shaft 70 is disposed inside the case 72, and extends from the tip of the case 72 into the pressure vessel 12. The stirring shaft 70 is rotatably supported by bearings 78 provided at three locations inside the case 72. The bearing 78 can be a carbon bearing. Permanent magnets 80 are arranged in a part of the stirring shaft 70 in the circumferential direction. An outer rotor 82 is disposed outside the case 72 where the permanent magnet 80 is disposed. The outer rotor 82 has a substantially annular shape, and permanent magnets 84 are arranged along the circumferential direction on the inner peripheral surface thereof. A V-shaped groove 86 is formed on the outer periphery of the outer rotor 82, and a V-belt 88 is hung on the V-shaped groove 86. The V belt 88 is also hung on a V pulley 92 driven by a motor 90, and transmits the driving force of the motor 90 to the outer rotor 82. When the outer rotor 82 rotates, the magnetic field formed by the permanent magnet 84 also rotates, and the stirring shaft 70 provided with the permanent magnet 80 rotates so as to be dragged by this magnetic field. A seal nut 94 having an air bleeding mechanism is screwed to the rear end (upper end in the drawing) of the case 72 to seal the inside of the case 72.

  FIG. 6 is a view showing a structure of a joint portion of the supply pipe 20, the discharge pipe 26, the supply hole 40a, and the discharge hole 40b. Both have a common structure, and the following description will be made on the supply pipe 20 and the supply hole 40a. In the supply hole 40a, a stepped portion 96 having a diameter that changes and a tapered portion 98 that follows the stepped portion 96 are formed. A taper is formed at the tip of the supply pipe 20 so as to correspond to the taper portion 98. A reverse screw portion 100 is provided near the tip of the supply pipe 20, and a reverse screw collar 102 is screwed thereto. A threaded portion 104 is provided in the vicinity of the inlet of the supply hole 40a, and a gland nut 106 is coupled to engage with the threaded portion 104. When the ground nut 106 is tightened, the tip of the gland nut pushes the reverse screw collar 102, whereby the tip of the supply pipe 20 is pressed against the tapered portion 98, and this portion is sealed.

  The pressure vessel 12 of the present embodiment can lock the lid 34 with a simple operation of allowing the pin 36 to penetrate the container body 32 and the lid 34 from the side. Opening and closing can be performed in a short time without requiring a rotating operation using a screw or the like. In addition, since the connection of the power line 60 for supplying power to the in-container heater 22 provided inside the container is performed simultaneously with the opening and closing of the lid 34, it contributes to shortening the time required for opening and closing. In addition, since the number of the pins 36 is two, the stirrer 24 can be disposed in the central portion of the lid 34.

It is a figure which shows schematic structure of the carbon dioxide supercritical apparatus to which the pressure vessel of this embodiment is applied. It is a figure which shows the outline of a pressure vessel. It is a figure which shows the structure regarding the seal | sticker of a pressure vessel. It is a figure which shows the structure regarding the electric power supply to the heater in a container provided in the pressure vessel. It is a figure which shows schematic structure of the stirrer which stirs the contents of a pressure vessel. It is a figure which shows the sealing structure of the lid | cover of a pressure vessel, a supply pipe | tube, and a discharge pipe.

Explanation of symbols

  10 Carbon dioxide supercritical equipment, 12 Pressure vessel, 22 Heater in vessel, 24 Stirrer, 32 Vessel body, 34 Lid, 36 pin, 42 Lid through-hole, 44 Vessel through-hole, 54 Contact socket, 56 Bracket, 58 Contact pin .

Claims (3)

A container body having a substantially cylindrical end closed;
A lid that fits into the cylindrical inner surface of the open end of the container body and seals the opening of the container body;
Two pins for locking the lid, penetrating the container body and the lid, avoiding the central portion of the lid, in a plane intersecting the substantially cylindrical axis of the container body;
Having a pressure vessel.   It is a pressure vessel of Claim 1, Comprising: It has a stirring axis | shaft arrange | positioned along the axis line of a container main body in the center of a lid | cover, and the stirring axis | shaft has a stirring blade at the front-end | tip. The pressure vessel according to claim 1 or 2,
A heater which is arranged inside the container body and generates heat by supplying power;
A heater side contact connected to the heater;
A lid-side contact that is arranged on the lid and connected to a power wiring for supplying power to the heater;
Have
A pressure vessel in which a heater-side contact and a lid-side contact are connected and disconnected by movement of a lid in a substantially cylindrical axis direction of the vessel body.

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