JP2005219018A - Pressure vessel and nozzle for pressure vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent a contained fluid from being splashed accompanying the supply of a pressure gas by a relatively simple structure. <P>SOLUTION: A forcible feeding tank 11 for forcibly feeding paint is provided at the top of a vessel body 12 wherein paint is contained with a cap 13 which blocks off an opening 12a to make it in a closed state. A coater is connected via a hose to a forcible feeding pipe 17 connected to the bottom of the vessel body 12. On the top of the vessel body 12, a mounting seat 19 is provided and a nozzle 20 is installed facing downward. A regulator 23 and a cock 24 are installed on the nozzle 20 which is then connected via a hose, etc. to the supply source of a pressure gas (nitrogen). By forming a plurality of spouting ports 20c having openings facing sideways at the tip section of the nozzle 20, the pressure gas (nitrogen) is made to spout while being dispersed sideways. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pressure container such as a pressure tank or a storage container for pressure-feeding paint or the like, and a pressure container nozzle attached to the pressure container.

For example, as shown in FIG. 6, a pressure-feed tank for paint used in the coating field includes an inner container 2 in which a paint P is accommodated in a cylindrical container body 1 having an open upper surface, and a container body 1. The top opening is closed in a sealed state by the lid 3. The lid 3 is provided with a supply pipe 4 connected to a compressed air supply source, and supports a pressure feeding pipe 5 for feeding the paint P by pressure. A nozzle 4 a is provided at the tip of the supply pipe 4 downward. A proximal end portion of the pressure feeding tube 5 is disposed at a bottom portion in the inner container 2, and a coating machine (for example, a spray gun) is connected to a distal end portion of the pressure feeding tube 5 via a hose or the like. As a result, compressed air is supplied into the container body 1 from the nozzle 4a at the tip of the supply pipe 4, and the paint P is supplied to the coating machine through the pressure feed pipe 5 based on pressurization of the internal paint. It has become.
JP-A-6-439 (FIG. 5)

  By the way, the compressed air is jetted out from the nozzle 4a described above, but in the above-mentioned conventional type, the compressed air hits the liquid level of the paint P in the inner container 2, and the paint P Has been scattered and adhered to the inner surface of the container body 1 and the lid 3. For this reason, the attached paint P is not only dry and sticky, but also gets dirty, but the lid 3 sticks and cannot be removed, and the paint P also adheres to the packing that seals between the container body 1 and the lid 3 and deteriorates early. (Insufficient sealing performance) was incurred. Conventionally, the supply pipe 4 (nozzle 4a) portion has not been devised to prevent such paint scattering.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pressure that can effectively prevent the fluid contained therein from being scattered with the supply of pressure gas with a relatively simple configuration. It is in providing the nozzle for a container and a pressure vessel.

  In order to achieve the above object, a pressure vessel according to the present invention includes a container main body in which a fluid is accommodated, a lid for closing the upper opening of the container main body in a sealed state, and the upper or lid of the container main body. Provided with a nozzle for supplying a pressure gas into the container body so that the pressure gas ejected from the nozzle does not directly hit the surface of the fluid in the container body. The invention has a feature in that scattering prevention means is provided (invention of claim 1).

According to this, since the pressure gas ejected from the nozzle is prevented from directly hitting the surface portion of the fluid in the container body by the scattering prevention means, the fluid scatters and adheres to the inner surface of the container body or the lid. This prevents the occurrence of harmful effects.
In addition, the fluid in this invention contains the liquid (a high viscosity thing is included) and powder. The pressure gas includes gases such as compressed air, dry air, and nitrogen. The pressure container is not only a container used for pressure-feeding a fluid, but also air inside a container that contains a fluid. Also included are those used for such purposes as being replaced with an inert gas and stored in a positive pressure state.

  More specifically, the scattering prevention means can be configured by setting the direction of the nozzle outlet to the side (invention of claim 2). Alternatively, the scattering preventing means can be configured by providing an obstruction member at the tip of the nozzle outlet (invention of claim 3). Furthermore, in the case of a double structure including an internal container for containing a fluid in the container main body, the scattering prevention means can be constituted by an upper lid portion of the internal container. Invention). According to these, it is possible to effectively prevent scattering of the contained fluid with any simple configuration.

  The nozzle for a pressure vessel according to the present invention is attached downward to an upper portion of a pressure vessel in which a fluid is accommodated, and is for supplying a pressure gas into the pressure vessel. It is characterized in that it is structured to disperse the pressure gas to the side (invention of claim 5). According to this, since the pressure gas ejected from the nozzle is prevented from being dispersed to the side and directly hitting the surface portion of the fluid in the container body, the fluid is scattered on the inner surface of the container body and the lid. Adherence is prevented, and as a result, generation of harmful effects is prevented.

  According to the pressure vessel and the pressure vessel nozzle of the present invention, the pressure gas ejected from the nozzle is configured not to directly contact the surface portion of the fluid in the vessel body. There is an excellent effect that the fluid accommodated in the inside can be effectively prevented with a relatively simple configuration.

  Hereinafter, a first embodiment (corresponding to claims 1, 2 and 5) in which the present invention is applied to a pressure-feed tank for painting will be described with reference to FIGS. FIG. 1 shows the overall configuration of a pressure-feed tank 11 that is a pressure vessel according to the present embodiment. Here, the container main body 12 is formed in a substantially cylindrical shape from, for example, SUS, and a circular mouth portion 12a that protrudes upward is provided in the upper central portion so as to form a so-called wide-mouth bottle shape. Yes. The container main body 12 is configured to accommodate paint as a fluid.

  A lid 13 is detachably provided (openable and closable) at the opening at the upper end of the mouth 12a. The lid 13 is configured by attaching a gasket 14 for sealing on the lower surface side, and is firmly fixed to the mouth portion 12a by tightening the clamp band 15 with the upper end opening of the mouth portion 12a being closed. Thus, the opening of the mouth portion 12a is closed in a sealed state. In addition, the supply (replenishment) of the coating material into the container main body 12 from the mouth portion 12a is performed by loosening the clamp band 15 and removing the lid 13.

  On the other hand, a cylindrical base portion 16 is provided in a skirt shape at the lower portion of the container body 12. And the paint outlet 12b is provided in the center part of the bottom part of the container main body 12, and the pressure feed pipe 17 is connected to this paint outlet 12b. The pressure feeding pipe 17 is led out to the outside through the side surface of the pedestal 16, and a cock 18 is provided at a portion protruding from the pedestal 16. Although not shown, a coating machine such as a spray gun is connected to the distal end portion of the pressure feeding pipe 17 via a hose or the like.

  A nozzle mounting seat 19 is provided on the upper portion of the container body 12 so as to be located on the left side of the mouth portion 12a. The mounting seat 19 is configured to have a female screw portion so as to penetrate the upper wall of the container main body 12, and a nozzle 20 described later is attached to the mounting seat 19. A safety valve 22 is attached to a mounting seat 21 located on the right side of the mouth 12a. Further, although not shown, the container body 12 is provided with a pressure gauge, a liquid level indicator, and the like.

  Now, the nozzle 20 attached to the mounting seat 19 will be described with reference to FIG. As shown in FIG. 2, the pressure vessel nozzle 20 according to the present embodiment has a vertically long tubular shape in the drawing, and the outer peripheral portion has a hexagonal shape with a slightly larger portion near the upper portion, A first male screw portion 20a is formed on the lower side, and a second male screw portion 20b is formed on the upper side. The hollow portion in the nozzle 20 is open at the base end (upper end) surface, is closed at the front end (lower end) surface, and has a plurality of jets 20c that open laterally at the front end portion of the nozzle 20. Is formed. By this jet outlet 20c, pressure gas (nitrogen gas) is dispersed and jetted laterally, thereby constituting a scattering prevention means.

  As shown in FIG. 1, the nozzle 20 is attached by inserting the tip end side into the mounting seat 19 from the outside of the container body 12 and screwing the first male screw portion 20 a into the mounting seat 19. At this time, the tip end side of the nozzle 20 is disposed downward in the container body 12. A regulator 23 for pressure adjustment is attached to the second male screw portion 20 b of the nozzle 20, and a cock 24 is attached to the regulator 23. Although not shown, the cock 24 is connected to a supply source of pressurized gas, in this case, nitrogen gas, via a hose or the like.

  In the pressure feeding tank 11 configured as described above, when the cock 24 is opened, nitrogen gas from the supply source is pressurized into the container body 12 via the regulator 23 and the nozzle 20 (for example, 0.3 to 0.3). 0.5 MPa) and the inside is pressurized. In this state, when the cock 18 of the pressure feeding pipe 17 is opened, the paint in the container body 12 is pressure fed to the coating machine through the pressure feeding pipe 17.

  At this time, high-pressure nitrogen gas is ejected from the nozzle 20 into the container main body 12, but since the nozzle 20c of the nozzle 20 is open to the side, the nitrogen gas is ejected sideways. The high-pressure gas does not directly hit the liquid surface of the paint, and the paint is prevented from scattering. Incidentally, according to the prototype of the present inventor, in the pressure feeding tank 11 of this embodiment, the adhesion of the paint to the inner surface of the upper wall portion of the container body 12 and the inner surface of the lid 13 is not seen at all. The effect of preventing the paint from splashing was remarkable.

  As described above, according to the pressure feed tank 11 and the nozzle 20 of the present embodiment, the jet outlet 20c at the tip of the nozzle 20 is provided so as to open to the side, so that the compressed air is directed downward from the conventional nozzle 4a. Unlike what is sprayed and directly hits the liquid surface of the paint P, the high-pressure nitrogen gas jetted from the nozzle 20 is prevented from directly hitting the surface of the paint in the container body 12. As a result, it is possible to effectively prevent the paint from splashing and adhering to the inner surface of the container body 12 or the lid 13. As a result, the paint is not contaminated and the lid 13 is stuck and cannot be removed. Therefore, it is possible to prevent the occurrence of defects that cause deterioration due to adhesion. In addition, a relatively simple configuration in which the direction of the nozzle 20c of the nozzle 20 is set to the side can be achieved.

  FIG. 3 schematically shows the configuration of a pressure-feed tank 31 that is a pressure vessel according to a second embodiment (corresponding to claim 3) of the present invention. The pressure feeding tank 31 includes a cylindrical container-shaped container body 32 and a lid 33 for closing the upper surface opening of the container body through a packing (not shown). An internal container 34 for storing P is provided. The inner container 34 has a cylindrical container shape smaller than the container main body 32 and is detachably mounted on the inner bottom portion of the container main body 32. Accordingly, the storage (replenishment) of the paint P can be performed by opening the lid 33 and taking out the inner container 34.

  A pressure feed pipe 35 for pressure-feeding the coating material P is supported in a penetrating state on the lid 33, and a nozzle 36 for supplying pressure gas (nitrogen gas) to the inside of the container body 32 is attached. A base end portion (lower end portion) of the pressure feeding pipe 35 is arranged at a bottom portion in the inner container 34, and a coating machine is connected to a distal end portion of the pressure feeding pipe 35 via a hose or the like. Further, the nozzle 36 has a downward jet port, and is connected to a nitrogen gas supply source (not shown).

  Further, a disc-shaped baffle plate 37 as an obstruction member is provided at the front (lower side) of the nozzle 36 with a slight gap from the ejection port. The baffle plate 37 has, for example, a disk shape having a diameter substantially the same as that of the inner container 34, and is supported by and attached to the lid 33 at a plurality of locations on the outer peripheral side portion (not shown). Thus, the scattering prevention means is configured to prevent the pressure gas ejected from the nozzle 36 from directly hitting the surface portion of the paint P in the container body 32 (inner container 34).

  According to such a configuration, the pressure gas ejected downward from the ejection port of the nozzle 36 strikes the baffle plate 37 and is supplied to flow sideways. Therefore, as in the first embodiment, the pressure gas ejected from the nozzle 36 is prevented from directly hitting the surface portion of the paint P. As a result, the paint P is applied to the inner surfaces of the container body 32 and the lid 33. It is effectively prevented from splashing and adhering to the surface, and as a result, not only is the dirt due to the paint P removed, but the lid 33 is stuck and cannot be removed, or the paint P adheres to the packing and deteriorates at an early stage. Occurrence can be prevented in advance. In addition, a relatively simple configuration in which only the baffle plate 37 is provided can be achieved.

  In the second embodiment, the disk-shaped baffle plate 37 is used as the obstruction member. However, as the obstruction member, the L-shape is located at the front of the jet outlet by being bent at a substantially right angle after extending downward. The shape of the obstructing member is such that the same action and effect can be obtained even if a plate-like plate is attached to the tip of the nozzle 36 or a conical diffuser is provided at the tip of the nozzle 36 outlet. Various modifications can be made to the mounting structure and the like.

  FIG. 4 schematically shows the configuration of a pressure feed tank 41 as a pressure vessel according to a third embodiment (corresponding to claim 4) of the present invention. The third embodiment is different from the second embodiment in that the scattering prevention means is configured from the upper lid portion of the inner container. That is, the pressure feed tank 41 is also configured to include a container body 32, a lid 33, an inner container 34, a pressure feed pipe 35, a nozzle 36 having a downward jet port, and the like.

  In this embodiment, the inner container 34 has an upper lid portion 42 that is detachably placed on the upper surface thereof. In use, the upper lid portion 42 is pressed against the upper surface of the inner container 34 as shown in the figure. The pipe 35 is covered so as to leave room for insertion. Thus, the upper lid portion 42 constitutes an anti-scattering means for preventing the pressure gas ejected from the nozzle 36 from directly hitting the surface portion of the paint P in the container body 32 (inner container 34). It is.

  Therefore, also according to the third embodiment, the pressure gas ejected from the nozzle 36 is prevented from directly hitting the surface portion of the paint P. As a result, the paint P is applied to the inner surfaces of the container body 32 and the lid 33. Scattering and adhering are effectively prevented, and as a result, adverse effects caused by the adhesion of the paint P are prevented. In addition, a relatively simple configuration in which the upper lid portion 42 is provided on the upper surface of the inner container 34 can be achieved.

  In the first embodiment described above, the nozzle 20 itself is provided with the lateral jet port 20c. However, as in the fourth embodiment shown in FIG. 5, an opening is formed on the tip (lower end) surface. It is good also as a structure which attaches the separate filter member 52 to the nozzle 51 which it had. In this case, the filter member 52 has a cylindrical shape (tubular shape) with a closed front end surface (lower end surface), and the internal thread portion formed on the upper end portion thereof is screwed into the external thread portion formed on the outer periphery of the nozzle 51. Installed by. A plurality of jet openings 52a that are open to the side are formed on the side wall surface of the filter member 52, so that the pressure gas is dispersed and jetted laterally. Even with this configuration, the same operations and effects as those of the first embodiment can be obtained.

  In addition, the present invention can be applied not only to a pressure tank, but also to a storage container that stores air in a container containing a fluid in a positive pressure state by replacing it with dry air, inert gas, or the like. In addition to the paint, the fluid contained in the container may be various liquids such as a curing agent, an adhesive, and a cleaning liquid, and may be a powder. It can be implemented with appropriate modifications.

BRIEF DESCRIPTION OF THE DRAWINGS The 1st Example of this invention is shown, The front view which shows the whole structure of a pumping tank in part longitudinal section Nozzle longitudinal section The perspective view which shows the 2nd Example of this invention and shows roughly the whole structure of a pressure tank. FIG. 3 equivalent view showing a third embodiment of the present invention. The longitudinal cross-sectional view of the front-end | tip part of the nozzle which shows the 4th Example of this invention FIG. 3 equivalent view showing a conventional example

Explanation of symbols

In the drawings, 11, 31, 41 are pressure tanks (pressure vessels), 12, 32 are container bodies, 13, 33 are lids, 17, 35 are pressure feed tubes, 20, 36, 51 are nozzles, 20c is a jet outlet, 34 Is an internal container, 37 is a baffle plate (obstacle member), 42 is an upper lid part, 52 is a filter member, 52a is a spout, and P is paint (fluid).

Claims (5)

A container body in which a fluid is stored;
A lid for closing the upper opening of the container body in a sealed state;
A pressure vessel comprising a nozzle that is provided downwardly on the top or lid of the vessel body and that supplies pressurized gas into the vessel body,
A pressure vessel provided with scattering prevention means for preventing the pressure gas ejected from the nozzle from directly hitting the surface portion of the fluid in the vessel body.   2. The pressure vessel according to claim 1, wherein the scattering prevention means is configured by setting the direction of the nozzle outlet of the nozzle to the side.   2. The pressure vessel according to claim 1, wherein the scattering prevention means is configured by providing an obstruction member at the tip of the nozzle outlet.   2. The container main body has a double structure including an inner container for containing the fluid, and the scattering prevention means includes an upper lid portion of the inner container. The pressure vessel as described. A nozzle attached downward to the top of a pressure vessel in which a fluid is contained, for supplying a pressure gas into the pressure vessel,
A nozzle for a pressure vessel, characterized in that a jet port for ejecting the pressure gas is structured to disperse the pressure gas laterally.

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