JP4501712B2 - Fluid supply / discharge device - Google Patents

Description

  The present invention relates to an air tank for storing compressed air generated by a compressor, and a container for storing steam pressurized by a boiler, and in particular, two types such as gas and liquid stored in these containers It is related with the fluid supply / discharge device which discharged | emitted each fluid independently from the container, or was supplied to the container.

  In an air compressor, the air is sucked and compressed by a compressor to generate compressed air, and the compressed air is stored in an air tank and supplied to an air tool or the like via the air tank. The compressed air generated by the compressor contains water vapor in the atmosphere, and this water vapor is compressed together with the compressed air and stored in the air tank. When compressed air that has become hot when the atmosphere is compressed is cooled in the tank, water vapor in the compressed air precipitates as moisture due to saturation, and this moisture accumulates at the bottom of the air tank as a drain. It is done. If this drain stays in the air tank for a long period of time, corrosion will occur at the welded part of the socket that forms the screw seat for connecting the air tank itself and piping to the air tank. It is necessary to periodically drain the accumulated drain out of the air tank.

  Therefore, in the air tank of the air compressor, an air supply device for supplying compressed air generated by the compressor into the air tank, an exhaust device for taking out the compressed air stored in the air tank to an air tool, and the like It is necessary to form a drain discharge device for discharging the drain accumulated at the bottom of the air tank to the outside of the air tank. Since the compressed air supply for supplying compressed air from the compressor into the tank and the supply / exhaust device for taking out compressed air to the pneumatic tool or the like are the same gas, they can be shared by one opening. Therefore, it is necessary to form an opening for draining the drained condensate separately from the aforementioned gas supply / exhaust device, and therefore, it is necessary to form at least two openings in the air tank.

  In a conventional air tank that stores compressed air, a plurality of sockets are formed in the air tank by welding or the like, and a supply pipe for supplying compressed air from the compressor to the air tank is connected to one socket. In the other socket, a drain discharge device for discharging drain accumulated at the bottom of the air tank is formed. Since such a socket is normally formed in the air tank by welding or the like, forming a plurality of sockets in the air tank as described above increases the cost of parts as the number of welding processes increases. There was a problem.

In order to solve the above-mentioned problem, a supply for supplying compressed air generated by a compressor into an air tank by forming two openings spaced apart from each other in one socket formed in the air tank. A pipe is connected, and a drain pipe for discharging the drain in the air tank to the outside of the air tank is inserted through the other opening, and the compressed air supply / discharge device and the drain are provided by one socket formed in the air tank. A technique for forming a discharge device has already been proposed.
JP 2004-76864 A

  In the above prior art, in order to form a compressed air supply / discharge device and a drain discharge device in one socket, the socket is formed with two openings for communicating these devices and the air tank. For this reason, the outer diameter of the socket is increased, the pressure receiving area where the compressed air in the air tank acts on the socket is increased, and the mounting strength of the socket to the air tank is reduced. Yes. In order to maintain the strength against the pressure of the compressed air in the air tank, there is a problem that it is necessary to increase the welding strength and the like, which further increases the manufacturing cost.

  The present invention solves the above-mentioned problems of the prior art and forms a supply / discharge device for each of two fluids such as compressed air and drain in a single socket formed in a container such as an air tank, It is an object of the present invention to provide a fluid supply / discharge device that can be formed with a small diameter and can sufficiently maintain strength due to pressure in the air tank.

The fluid supply / discharge device of the present invention is a fluid supply / discharge device that discharges compressed air from an air tank or supplies the compressed air into the air tank, and includes a socket penetrating the upper portion of the air tank and the socket. A continuous opening is formed in the nipple to be mounted, and the compressed air is supplied and discharged through the opening, and the outer diameter of the opening formed in the socket and the nipple is smaller than the inner diameter of the opening. The hollow pipe is inserted through, and one end of the hollow pipe is disposed near the bottom of the air tank, the other end is opened to the atmosphere, and an open / close valve is provided in the hollow pipe, and the open / close valve is closed. supplying the compressed air at through the opening, it is discharged, and characterized by discharging the drain accumulated in the tank by the opening operation of the on-off valve from the hollow pipe That.

  According to a second aspect of the present invention, the opening is formed in a substantially circular shape, and the hollow pipe is disposed at a substantially central portion of the opening.

According to the fluid supply / discharge device of the present invention, an opening is formed in the socket penetrating the upper portion of the air tank and the nipple attached to the socket, and the compressed air is supplied and discharged through the opening. In addition, a hollow pipe having an outer diameter smaller than the inner diameter of the opening is inserted into the opening formed in the socket and nipple, and one end of the hollow pipe is disposed in the vicinity of the bottom of the air tank. The other end is opened to the atmosphere, and an open / close valve is provided in the hollow pipe. When the open / close valve is closed, the compressed air is supplied and discharged through the opening, and the open / close valve is opened to open the inside of the tank. since the accumulated drain in the manner to be discharged from the hollow pipe, for discharging the fluid supply and discharge device and drain down for compressed air in a container such as air tank to the outside of the container It is not necessary to form two sockets body supply and discharge device are formed respectively, a discharge device for a single socket or supply and discharge device and drain down for the first fluid such as compressed air in the nipple to be attached to the socket due to the arrangement, it is possible to provide a container of low cost it is possible to reduce cost of minutes to form a plurality of sockets in a container of the air tank. Further, by opening the on-off valve by manual operation, the drain accumulated in the air tank can be discharged out of the tank.

  Further, by forming an opening in the socket or nipple and inserting a hollow pipe having an outer diameter smaller than the inner diameter of the opening into the opening, the pipe, the outer peripheral surface of the hollow pipe, and the opening Since the two flow paths are formed by the annular flow path for compressed air formed between the peripheral surfaces, the socket is more than the conventional technique in which the openings for the two supply / discharge devices are arranged side by side in the socket. The outer diameter can be set small, the strength against the pressure in the tank can be maintained, and the space can be saved and the size can be reduced.

  Furthermore, according to the invention of claim 2, the opening is formed in a substantially circular shape, and the hollow pipe is disposed at a substantially central portion of the opening. Therefore, the processing time can be shortened and the part cost can be reduced. The number of sockets is reduced and the cost of the container can be reduced.

  In the present invention, the supply / discharge device for each of two fluids such as compressed air and drain is formed in one socket formed in a container such as an air tank, and the outer diameter of the socket can be formed small so that the pressure in the air tank For the purpose of providing a fluid supply / discharge device capable of sufficiently maintaining the strength of the two fluids, an opening is formed in a socket formed in a container or a nipple attached to the socket, and the two fluids are passed through the opening. And supplying a hollow pipe having an outer diameter smaller than the inner diameter of the opening into the opening formed in the socket or nipple, with the socket or nipple inserted, and This is realized by supplying or discharging other fluids of the two fluids through the hollow pipe, and more specific examples will be described below.

  FIG. 1 shows an auxiliary tank 1 as an example of a container in which a fluid supply / discharge device of the present invention in which compressed air generated by a compressor is stored. In general, compressed air generated by a compressor is stored in an air tank formed integrally with the compressor, and is supplied from the air tank to an air operating tool such as an air nailer to operate the air operating tool. I am doing so. However, in portable compressors, the air tank is formed small for size reduction and weight reduction, and there are cases where tools that consume a large amount of compressed air cannot be used continuously. For this reason, when continuously using a tool that consumes a relatively large amount of compressed air, an auxiliary tank is connected to the air tank of the compressor body in order to increase the amount of compressed air stored. Yes.

  The auxiliary tank 1 is formed in a long barrel shape by closing both ends of a cylindrical body portion with a substantially hemispherical end piece, and an installation leg 2 is attached to the lower part of the auxiliary tank 1 and the upper part is provided with an upper part. A grip 3 that is gripped when carrying the auxiliary tank 1 is attached so that the auxiliary tank 1 can be transported and placed on an arbitrary floor surface away from the compressor body. Further, the auxiliary tank 1 is supplied with compressed air as the first fluid supplied from the air tank of the compressor body into the auxiliary tank 1 or the compressed air stored in the auxiliary tank 1 is supplied to the air of the compressor body. A supply / discharge device 4 for compressed air for discharging to the tank and a drain discharge device 5 for discharging drain as the second fluid accumulated in the auxiliary tank 1 to the outside of the auxiliary tank 1 are formed. ing.

  As shown in FIG. 2, the compressed air supply / discharge device 4 and the drain discharge device 5 are formed in a single socket 6 formed on the outer shell of the auxiliary tank 1. The socket 6 is attached to the upper surface of the outer shell of the auxiliary tank 1 by welding or the like, and an opening 7 communicating with the inside of the auxiliary tank 1 is formed at the center of the socket 6. A hose joint 8 forming the supply / exhaust device 4 for compressed air is attached to a side surface of the socket 6 so as to communicate with an opening in the socket. By connecting the auxiliary tank 1 to the air tank of the compressor body via the air hose connected to the hose joint 8, the compressed air generated in the compressor body is supplied to the auxiliary tank 1. The accumulated compressed air is discharged to the air tank side of the compressor body.

  Further, a female screw 9 continuous with the opening 7 is formed at the upper end of the socket 6, and the drain accumulated in the bottom of the auxiliary tank 1 is discharged from the auxiliary tank 1 through the female screw 9. The drain discharge device 5 is attached to the socket. The drain discharge device 5 includes a nipple 10 formed with a male screw portion to be screwed with a female screw 9 formed at the upper end of a socket 6, an upper end portion 11a held by the nipple 10 and a lower end portion 11b. Is constituted by a hollow pipe 11 disposed close to the bottom of the auxiliary tank 1 and a drain discharge tube 13 connected to the hollow pipe 11 via an on-off valve 12 that is opened and closed by a manual operation. .

  The hollow pipe 11 and the opening / closing valve 12 are attached to the nipple 10, and the hollow pipe 11 and the opening / closing valve 12 are communicated with each other via the nipple 10, and the female nipple 10 is formed at the upper end of the socket 6. The drain discharge device 5 is attached to the socket 6 by being screwed onto the screw 9. By manually operating an operating lever 14 formed at the upper end of the on-off valve 12 to open the on-off valve 12, the drain accumulated in the auxiliary tank 1 together with the compressed air in the auxiliary tank 1 is hollowed into the hollow pipe 11, The gas is discharged out of the auxiliary tank 1 through the on-off valve 12 and the drain discharge tube 13.

  As shown in FIG. 3, the inner diameter dimension of the opening 7 formed in the socket is formed larger than the outer diameter dimension of the hollow pipe 11, and the hollow pipe 11 whose upper end is held by the nipple 10 is Arranged at substantially the center of the opening 7 formed in the socket 6. As a result, an annular flow path 15 for compressed air is formed between the outer peripheral surface of the hollow pipe 11 and the inner peripheral surface of the opening 7, and the compressed air in the auxiliary tank 1 is passed through the annular flow path 15. The air is discharged to the hose joint 8 side or compressed air from the air tank of the compressor body is supplied into the auxiliary tank 1.

  According to the above embodiment, the compressed air is supplied to or discharged from the auxiliary tank 1 as an example of a container in which two kinds of fluids, ie, compressed air as the first fluid and drain as the second fluid are stored. Since the supply / discharge device 4 and the drain discharge device 5 for discharging the drain to the outside of the auxiliary tank 1 are arranged in one socket 6 formed in the auxiliary tank 1, a plurality of sockets are formed in the auxiliary tank 1. Therefore, it is possible to provide the low-cost auxiliary tank 1. Further, by forming an opening 7 in the socket 6 and inserting a hollow pipe 11 having an outer diameter smaller than the inner diameter of the opening 7 into the opening 7, the hollow pipe 11 and the inner peripheral surface of the opening 7 are inserted. And the annular flow path formed between the outer peripheral surface of the hollow pipe 11 and the flow path for the supply / discharge device are formed, the outer diameter of the socket 6 can be set small, and the auxiliary tank 1 The strength against the internal pressure can be maintained, and the space can be saved and the auxiliary tank 1 can be downsized.

  Further, the opening 7 is formed in a perfect circle shape, and the hollow pipe 11 is disposed concentrically at the center of the opening 7, so that one socket 7 is formed in a circular shape. Therefore, the machining time can be shortened, the parts cost can be reduced, and the cost of the auxiliary tank 1 can be reduced.

  4 and 5 show another embodiment of the present invention. In the above-described embodiment, the opening 7 formed in the socket 6 is formed in a substantially circular shape and is smaller than the inner diameter of the opening 7. An outer-diameter hollow pipe 11 is arranged at the center of the circular opening 7, but the socket 21 formed in the auxiliary tank 20 according to this embodiment has an oval shape as shown in FIG. The opening 22 is formed, and the same hollow pipe 11 as that of the above-described embodiment is arranged on one side of the opening 22. Then, a hose joint 8 similar to the above-described embodiment is attached to the side surface of the socket 21 on the side where the hollow pipe 11 is not disposed, and the hose joint 8 and the hollow pipe 11 in the oval opening 22 are connected to each other. A compressed air flow passage 23 formed on the non-arranged side is connected.

  As described above, the opening 22 formed in the socket 21 is formed in an oval shape, and the hollow pipe 11 is arranged so as to be shifted to one side of the oval opening 22 so that two conventional feeds are provided in one socket. The outer diameter of the socket 21 can be set smaller than those formed by separating the openings for forming the flow path for the drainage device, the strength against the pressure in the auxiliary tank 20 can be maintained, and space saving can be achieved. At the same time, the auxiliary tank 20 can be downsized.

  FIG. 6 shows a modification of the embodiment shown in FIGS. 4 and 5 described above. The opening 22 formed in the socket 21 in the above embodiment has two substantially circular openings as shown in FIG. The same effect can be obtained by forming the pipes 24 in contact with each other and inserting the hollow pipe 11 into one opening 24. Forming two perfect circular openings 24 as described above is easier to process than forming the oval opening 22 and can reduce the manufacturing cost. Further, the socket 21 is formed by forming two openings 24 in contact with each other so that the openings for forming two flow passages for the supply / discharge device are separated from each other. The outer diameter can be set small, and the strength against the pressure in the auxiliary tank 20 can be maintained.

The side view which shows the auxiliary tank for compressed air which implemented the supply / discharge device of this invention Vertical side view showing the same auxiliary tank supply / discharge device as FIG. Sectional view on the AA line in FIG. Vertical side view showing a supply / discharge device according to another embodiment Sectional drawing on the BB line in FIG. Sectional drawing similar to FIG. 5 which shows the example of expansion | deployment of the supply / discharge device of FIG.

1, 20, 30 Auxiliary tank 4 Compressed air supply / discharge device (fluid supply / discharge device)
5 Drain discharge device (fluid supply / discharge device)
6, 21, 31 Socket 7, 22, 32 Open 8 Hose joint 10, 34 Nipple 11, 35 Hollow pipe 15 Annular flow path

Claims (2)

The compressed air A fluid supply and discharge device so as to supply to and discharged from the air tank or the air tank, to form an opening continuous with the nipple to be attached to the socket and the socket top was passed through an air tank The compressed air is supplied and discharged through the opening, and a hollow pipe having an outer diameter smaller than the inner diameter of the opening is inserted into the opening formed in the socket and nipple. One end of the hollow pipe is disposed near the bottom of the air tank, the other end is opened to the atmosphere, and an open / close valve is provided in the hollow pipe, and the compressed air is supplied through the opening when the open / close valve is closed. A fluid supply / discharge device characterized in that it is supplied and discharged, and the drain accumulated in the tank by the opening operation of the on-off valve is discharged from the hollow pipe . The fluid supply / discharge device according to claim 1, wherein the opening is formed in a substantially circular shape, and the hollow pipe is disposed at a substantially central portion of the opening.

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