JPH0441280Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an ejector device, and more particularly to an ejector device in which at least fluid supply and discharge to and from a plurality of vacuum generators including a nozzle portion and a diffuser portion are performed by a manifold. .

BACKGROUND ART Ejectors have conventionally been used as devices for ejecting steam, air, or water from a nozzle to suction air to 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 and kinetic energy on the outlet side of the nozzle section.

Incidentally, various types of ejector devices have been proposed in the past, such as those that can obtain a high vacuum due to the characteristics of the nozzle portion of the ejector, or those that have large flow characteristics at low vacuum. In particular, in recent years, there has been a noticeable trend to unitize various ejector devices from the standpoint of reducing installation space and reducing fluid consumption as much as possible, and such devices are actually being commercialized.

However, in the conventional ejector device that is unitized in this way, various pipe lines such as a fluid supply pipe and a fluid discharge pipe are connected to a plurality of vacuum generators including the nozzle part and the diffuser part. are individually and directly connected in communication. Therefore, there are problems in that the pipelines become complicated, the piping work becomes complicated, and the installation space becomes large. Also,
Since the direction in which the pipes can be connected is naturally limited, there is also the drawback that piping work cannot be carried out according to specifications such as side piping or back piping.

Therefore, as a result of intensive research and efforts, the inventors of the present invention and others have found that the piping can be simplified by using a manifold to perform at least the fluid supply and discharge operations for multiple vacuum generators including the nozzle section and the diffuser section. It has been found that an ejector device can be obtained in which a large degree of freedom is obtained in the connection direction of the conduit, the installation space is reduced, and the amount of fluid consumed can be reduced, thereby eliminating the above-mentioned disadvantages.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ejector device that allows easy piping work, requires a small installation space, and allows a variety of piping methods to be selected depending on specifications.

To achieve the above object, the present invention includes a plurality of vacuum generators including a nozzle part, a vacuum generation part, and a diffuser part; a manifold having at least a fluid supply port and a fluid discharge port; and the vacuum generator. and a mounting plate having a sealing effect interposed between the mounting plate and the manifold, and communicating the nozzle part and the diffuser part of the vacuum generator with the fluid supply port and the fluid discharge port of the manifold through the mounting plate. It is characterized by

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

In FIGS. 1 and 2, reference numeral 10
A, 10B, and 10C each indicate a vacuum generator made of a rectangular body. This vacuum generator 10A, 10B, 1
0C has a nozzle part 12 of a predetermined diameter inside and a differential user part 14 connected to this nozzle part 12.
The nozzle section 12 and the differential user section 1
4 is integrally formed. The vacuum generators 10A, 10B, and 10C configured in this way have a hole 16 that opens at the bottom surface in the figure and communicates with the nozzle section 12, and a diffuser section 1.
A hole 18 communicating with the small diameter portion of the diffuser portion 4 and a hole 20 communicating with the large diameter portion of the diffuser portion 14 are formed. Further, the vacuum generators 10A, 10B, 10C have a hole 22 located at the small diameter portion of the diffuser section 14, and communicate with the hole 22 so that the vacuum generators 10A, 10B, 10C are A first vacuum port 24 is formed on the top surface. Further, vertically penetrating bolt insertion holes 28A, 28B are formed in the vacuum generators 10A, 10B, 10C using the corners thereof.

Vacuum generators 10A, 10 configured in this way
B and 10C are connected to the manifold 32 with bolts 30A and 30B using their lower surfaces as attachment parts. That is, the bolt insertion holes 28A, 28
By inserting the bolts 30A, 30B into B and screwing them, the vacuum generators 10A, 10
B and 10C are connected to the manifold 32. At that time, vacuum generators 10A, 10B, 10C
Mounting plates 34A, 34B, and 34C having a sealing effect are interposed between and the manifold 32.
For this purpose, holes 36, 38, 40 corresponding to the three holes 16, 18, 20 on the lower surface of the vacuum generators 10A, 10B, 10C are formed in advance in the mounting plates 34A, 34B, 34C. . moreover,
At this time, between the vacuum generators 10A, 10B, 10C and the manifold 32, as shown in FIG. A silencer or filter 44 made of fiber is inserted through the recesses 42A, 42B, and 42C formed in the same position.
A, 44B, and 44C may be interposed.

On the other hand, the manifold 32 is connected to the vacuum generator 10.
The tie rod 50A is divided into three block bodies 46A, 46B, and 46C corresponding to the numbers of A, 10B, and 10C. , 50B, each block body 46
A, 46B, and 46C are connected. In this case, it is needless to say that the manifold 32 does not need to be formed separately, and may be formed singly.

A vacuum generator 10A,
The vacuum generator 10 is connected to the vacuum generator 10 through an air supply common port 54 that communicates with the nozzle portions 12 of 10B and 10C, and through a hole 55 that is similarly opened corresponding to the hole 38.
A, 10B, 10C common vacuum port 56 that communicates with the small diameter portion of the differential user portion 14, and a hole 58 that is similarly opened corresponding to the hole 40.
The air exhaust common port 60 communicates with the large diameter portion of the diffuser section 14 of the vacuum generators 10A, 10B, 10C via the block bodies 46A, 46B, 4.
They are formed so as to penetrate the inside of 6C in the horizontal direction in the figure. Furthermore, the block body 46
A, 46B, and 46C are formed with an air supply port 62 and an air exhaust port 64 that open toward the bottom surface. The air supply port 62 communicates with the air supply port 54, while the air exhaust port 64
communicates with the air exhaust port 60. Furthermore,
A second vacuum port 66 is formed in the block bodies 46A, 46B, and 46C and opens toward the bottom surface. In addition, the block bodies 46A, 46B, 4
A third vacuum port 68 that opens toward the right side is formed at 6C. Of course, the second vacuum port 66 and the third vacuum port 68 are communicated with the common vacuum port 56.

The ejector device according to the present invention is constructed as described above, and its operation and effects will be explained next.

First, in the assembled state as shown in FIG. 1, the first vacuum port 24 of each vacuum generator 10A, 10B, 10C and the second vacuum port 66 of each block body 46A, 46B, 46C are closed with blind plugs (not shown). .
Further, the air supply port 62 and air exhaust port 64 of each block body 46A, 46B, 46C are also closed with blind plugs (not shown). Of course, at this time, the opening in the front part of the common vacuum port 56 of the block body 46A in the front row and the block body 4 in the last row
The opening on the rear surface of the common vacuum port 56 of the block body 6C, and the openings on the rear surface of the air supply common port 54 and the air discharge common port 60 of the rearmost block body 46C are respectively closed with blind plugs (not shown).

In such a state, if compressed air from a compressed air supply source such as a compressor (not shown) is supplied into the manifold 32 through the air supply common port 54 of the block body 46A in the front row, the compressed air will be supplied to each block body 46A. , 46B, 46C through the air supply common port 54 and hole 52 of each vacuum generator 10A, 10B, 10C.
distributed and supplied to After that, the compressed air is throttled by the nozzle part 12, and then the diffuser part 1
It is emitted as a jet toward 4. As a result, negative pressure is generated at the small diameter part of the differential user part 14, in other words, at the outlet of the nozzle part 12, and inside the common vacuum port 56 and the third vacuum port 68, which communicate with the small diameter part through the hole 55. air is suddenly sucked in. In this way, the air is finally collected at the air exhaust common port 60 which communicates with the large diameter portion of the diffuser section 14 through the hole 58, and the air is collected at the air exhaust common port 60 which communicates with the large diameter portion of the diffuser section 14 through the hole 58. It is led out from the common port 60. For this reason,
The desired negative pressure can be obtained on the third vacuum port 68 side of each block body 46A, 46B, 46C.

As described above, in this embodiment, the manifold 32 is configured to supply and discharge air to and from the plurality of vacuum generators 10A, 10B, and 10C. Therefore, the vacuum generator 10A,
Compared to a device that connects pipe lines to 10B and 10C individually, the piping is simplified, piping work is much easier, and the installation space is also small.

In addition, in the manifold 32, there is a relative degree of freedom in the number of ports formed and the opening positions, so for example, the vacuum ports 24, 66, 68
Piping methods such as back piping and side piping can be freely selected according to specifications.

Furthermore, in this embodiment, the manifold 32
A plurality of block bodies 46A, 46B, 46C correspond to the number of vacuum generators 10A, 10B, 10C.
Each block body 46A, 4
Since the air supply port 62 and the air exhaust port 64 are formed independently for each of the vacuum generators 10A, 10B, 10C and the block bodies 46A, 46B, 46C, it is also possible to use them individually. can.

4 to 6 show another embodiment of the ejector device according to the present invention. In this case, the same reference numerals as in the previous embodiment indicate the same components.

In this embodiment, unlike the previous embodiment, the vacuum generators 10A, 10B, and 10C have a box-shaped main body section 70 having a nozzle section 12 and a diffuser section 14 having a rectangular cross section, and air supply ports located on both sides of the main body section 70. 72 and a flat vacuum port separator 76 having an air outlet 74.
Moreover, the vacuum generators 10A, 10B, 10C are connected to the block bodies 46A, 46 of the manifold 32.
It is configured to be sandwiched between B and 46C and connected. Furthermore, each block body 46A, 46B, 4
6C, one independent vacuum port 78 is formed for each of the block bodies 46A, 46B, and 46C so as to open at the upper surface thereof.

In this embodiment, each vacuum generator 10A, 10B,
Since 10C can be formed thin, space can be further saved.

FIG. 7 shows yet another embodiment of the ejector device according to the present invention. In this case as well, the same reference numerals as in the embodiment shown in FIGS. 1 to 3 indicate the same components.

In this embodiment, the vacuum generators 10A, 10B, 10C of the embodiment shown in FIGS. 46B, 46
It is configured to be attached to the top surface of C. Of course, in this case, the air supply port 72 and the air discharge port 74 are not formed in the vacuum port separator 76.

In this embodiment as well, the vacuum generators 10A, 10B, and 10C themselves can be made thin in the same manner as in the previous embodiment, so that space can be further saved.

As explained above, according to the present invention, at least the supply and discharge of fluid to the plurality of vacuum generators is performed by the manifold, so the entire device can be made compact, and the piping can be simplified. At the same time, a large degree of freedom is obtained in the direction in which the pipes are connected, making piping work easier, requiring less installation space, and allowing a variety of piping methods to be selected depending on specifications.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and changes in design are possible without departing from the gist of the present invention. Of course.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the ejector device according to the present invention, Fig. 2 is an exploded perspective view of the ejector device shown in Fig. 1, and Fig. 3 is a modification of the ejector device shown in Fig. 1. 4 is an exploded perspective view showing another embodiment of the ejector device according to the present invention, FIG. 5 is an assembled perspective view of the ejector device shown in FIG. 4, and FIG. 6 is an exploded perspective view showing another embodiment of the ejector device according to the present invention. FIG. 7 is a cross-sectional view of the main part of the ejector device shown in the figure, and FIG. 7 is a longitudinal cross-sectional view of the main part showing still another embodiment of the ejector device according to the present invention. 10A, 10B, 10C...vacuum generator, 12
...Nozzle section, 14... Diff user section, 16,
18, 20, 22...hole, 24...vacuum port, 28A, 28B...bolt insertion hole, 30A,
30B...Bolt, 32...Manifold, 34
A, 34B, 34C...Mounting plate, 36, 38, 4
0...hole, 42A, 42B, 42C...recess,
44A, 44B, 44C... Silencer or filter, 46A, 46B, 46C... Block body, 48A, 48B... Rod insertion hole, 50A,
50B...Tie rod, 52...Hole, 54...
Air supply common port, 55... hole, 56... common vacuum port, 58... hole, 60... air exhaust common port, 62... air supply port, 64...
Air exhaust port, 66, 68...Vacuum port, 7
0...Main unit, 72...Air supply port, 74...Air discharge port, 76...Vacuum port isolation plate, 78...
vacuum port.

Claims (1)

[Claims for Utility Model Registration] A plurality of vacuum generators including a nozzle section, a vacuum generation section, and a diffuser section, a manifold having at least a fluid supply port and a fluid discharge port, and the vacuum generator and the manifold. and a mounting plate having a sealing effect interposed therebetween, and communicating the nozzle part and the diffuser part of the vacuum generator with the fluid supply port and the fluid discharge port of the manifold through the mounting plate. ejector device.