JPH0561480B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an ejector device, and more particularly, the ejector body is formed into at least two block bodies, and by combining these blocks, a nozzle part and a diffuser part can be formed. The present invention relates to an ejector device integrally configured with the above.

[Prior Art] An ejector has been conventionally used as a device for ejecting steam, air, or water from a nozzle to suck air and create a vacuum. This type of ejector can generally be divided into a nozzle section and a diffuser section, and is configured to generate negative pressure by the pressure drop at the outlet of the nozzle section and kinetic energy.

[Problems to be Solved by the Invention] Incidentally, in the ejector device according to the prior art, the nozzle part is configured separately from the diff user part, and the nozzle itself is configured to be fitted into a plurality of wall parts, respectively. Because of this, it has been pointed out that it is not easy to assemble, and moreover, it requires a special sealing member to ensure airtightness, making assembly difficult and increasing manufacturing costs.

Moreover, the port for sending compressed air to the nozzle section, the differential user section, and the exhaust port are arranged in fixed positions, so it is not easy to use when connecting pipes, etc. There is an inconvenience.

Furthermore, there is an inconvenience that the exhaust noise is unbearable for those who work facing the direction in which the compressed air is exhausted from the exhaust port.

The present invention has been made to overcome the various disadvantages mentioned above, and by forming the two block bodies constituting the ejector body into substantially the same shape, manufacturing costs can be reduced and assembly can be simplified. In addition, the fluid introduction port, vacuum port, and fluid exhaust port are arranged symmetrically along the fluid flow direction, and if necessary, these ports are selectively closed by a closing means to improve usability. An object of the present invention is to provide an ejector device that can reduce noise damage by selectively regulating the exhaust direction of compressed air introduced from a fluid introduction port.

[Means for Solving the Problems] In order to achieve the above object, the present invention has an ejector main body separated into a first block body and a second block body formed substantially identically, and a first block body and a second block body formed substantially identically. A block body and a second block body are joined along the fluid flow direction, and the bulges and slopes formed on the first block body and the second block body are made to correspond to each other, respectively, to form a nozzle portion and a diffuser. a fluid introduction port and a vacuum port in each of the first block body and the second block body;
A fluid exhaust port is provided line-symmetrically with respect to the axis of the ejector body, and the fluid introduction port, the vacuum port, and the fluid exhaust port are arranged along the flow direction of the pressure fluid, and the first block body and the second
It is characterized by providing a closing means for selectively closing any one of the fluid introduction port, the vacuum port, and the fluid exhaust port of the block body.

[Operation] The ejector body is composed of a first block body and a second block body which are formed in substantially the same manner, and the ejector device is formed by simply overlapping and joining the two block bodies. can do. That is, the nozzle section and the diffuser section are formed by making the bulges and slopes formed on the superposed first and second block bodies correspond to each other, respectively.

In this case, since the fluid introduction port, the vacuum port, and the fluid exhaust port provided in each of the first block body and the second block body are symmetrical with respect to the axis of the ejector body, one of the By closing the fluid introduction port, vacuum port, and fluid exhaust port of the block body with a closing means and using the block body side as the mounting surface, the arrangement is easy and the usability is improved.

Furthermore, by closing any of the fluid exhaust ports, the exhaust direction of the pressure fluid introduced from the fluid introduction port can be regulated, and the working environment can be improved. That is,
If the fluid exhaust port facing the worker is closed, the worker will not be directly bothered by noise during exhaust.

[Embodiments] Next, preferred embodiments of the ejector device according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 20 indicates an ejector device, and this ejector device 20 includes first block bodies 14a that are formed line-symmetrically and substantially identically.
and a second block body 14b. The block bodies 14a and 14b include
Air introduction ports 20a, 20b, vacuum port 22
a, 22b and exhaust ports 24a, 24b are arranged at corresponding positions, that is, so that they are line symmetrical when the first block body 14a and the second block body 14b are assembled. For this reason,
Internal bulge 2 of each block body 14a, 14b
5a and 25b form a nozzle part 26, and the mutually expanding inclined surfaces 27a and 27b of these bulging parts 25a and 25b form a chamber 30, which becomes a diffuser part. The diff user section has inclined surfaces 27a, 2 extending from the nozzle section 26.
7b, and is configured to gradually expand in its cross section.

Therefore, when compressed air is introduced into the chamber 30 from the air introduction ports 20a and 20b in the above-described configuration, the compressed air is throttled by the nozzle portion 26 and is jetted toward the chamber 30 with great force.
Therefore, the air introduced from the vacuum ports 22a and 22b is sucked, and finally the exhaust port 24
a, 24b to the outside. That is, the desired negative pressure can be obtained at the vacuum ports 22a and 22b.

From the above, since the ejector device 20 is constructed by overlapping the blocks 14a and 14b, which are formed substantially identically, and assembling them substantially line-symmetrically, one of the blocks 14a (or 14b) For example, the ejector device 20 can be simply assembled by simply molding it by casting or the like. That is, it is only necessary to mold a single type of block body using a molded product such as a casting. Furthermore, it can be easily incorporated into other devices.

In addition, the block bodies 14a and 14b may be attached as necessary.
Of course, a sealing member can be provided between the two.

In this embodiment, the block bodies 14a, 14b
Since the blocks are divided in the direction along the air flow path, the fluid flows extremely smoothly.Moreover, if the block bodies 14a and 14b are made of precision-machined finish such as casting, it will not be difficult to apply a sealing member. It also has the advantage that ordinary sealing members are sufficient. Moreover, the air introduction ports 20a, 2
Since the vacuum ports 22a and 22b and the exhaust ports 24a and 24b are arranged line-symmetrically, the original function can be achieved even if only one of the symmetrical ports is used, providing excellent usability.
For example, air introduction port 20a, vacuum port 22
b. It can also be used as an exhaust port 24a,
In that case, the remaining ports may be closed with a blind plug or the like. Therefore, by selectively closing and using these ports depending on the installation environment of the ejector device 20, it is possible to obtain an ejector device that is easy to use.

Further, FIGS. 3 and 4 show other embodiments of the present invention, and the same reference numerals as in the previous embodiments indicate the same parts.

In this case, unlike the embodiments described above, the nozzle section and the diffuser section are each configured to have a perfect circular cross section. Of course, even in such a configuration, the same effects as in the above embodiment can be obtained.

[Effects of the Invention] According to the present invention, as described above, by configuring the ejector device with two block bodies exhibiting substantially the same shape and connecting the respective block bodies along the flow direction of the fluid, An ejector device capable of forming a nozzle portion and a diffuser portion by matching the bulging portions and inclined surfaces formed in the first block body and the second block body, respectively, and which is easy to assemble and has excellent airtightness. is obtained.

In addition, since multiple fluid introduction ports, vacuum ports, or fluid exhaust ports are provided line-symmetrically with respect to the axis of the ejector body, the original function can be maintained even if one of the symmetrical ports is used depending on the usability. is achieved. In this case, a plurality of fluid exhaust ports are arranged line-symmetrically, and the closing means can close the fluid exhaust ports to regulate the exhaust direction of the compressed air introduced from the fluid introduction port.
By selectively closing the fluid exhaust port in this way, there is an advantage that exhaust noise can be prevented from being directed directly toward the operator.

Furthermore, it is only necessary to mold a single type of block body from a molded product such as a casting, which results in lower manufacturing costs and further increases in precision.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an ejector device according to the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. The figure is a sectional view taken along the line -- in FIG. 14a...first block body, 14b...second block body, 20...ejector device, 20a, 20
b...Air introduction port, 22a, 22b...Vacuum port, 24a, 24b...Exhaust port, 26...
...Nozzle section, 30...chamber.

Claims (1)

[Claims] 1 The ejector main body is constructed by separating a first block body and a second block body that are formed substantially identically, the first block body and the second block body are joined along the fluid flow direction, and the ejector body The bulges and slopes formed on the first block body and the second block body correspond to each other to constitute a nozzle part and a diffuser part, and a fluid introduction port is provided in each of the first block body and the second block body. and a vacuum port and a fluid exhaust port are provided line-symmetrically with respect to the axis of the ejector body, and the fluid introduction port, the vacuum port, and the fluid exhaust port are arranged along the flow direction of the pressure fluid, and the An ejector device characterized in that it is provided with a closing means for selectively closing any one of a fluid introduction port, a vacuum port, and a fluid exhaust port of the first block body and the second block body.