JPH09287689A - Flow passage structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the thickness of a cross part between a plurality of flow passages, to form a fluid apparatus in a compact manner, and to provide the light fluid apparatus. SOLUTION: Flow passages 2 and 3 are formed in a structure 1 such that axes cross each other on one and the same plane and a counter bored hole 4 is formed in a cross part therebetween, a block 5 having a through-hole 6 is inserted therein and securely sealed with metal flows 7 and 8. Further, boring is applied on the opening part of the flow passage 3 in the counter bored hole 4 of the flow passage 2 to form an annular groove 9 for bypass, and fluid flows to the front and the rear of the block 5 of the flow passage 3. This constitution provides the flow passages 2 and 3 forming flow passages separate and independent from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow passage structure suitable for use in a fluid device such as a control valve device such as a hydraulic device, a vacuum device, a water flow device or the like having a plurality of flow passages intersecting each other in a structure. .

[0002]

2. Description of the Related Art A conventional flow channel structure of a fluid device having a plurality of flow channels is shown in FIGS. In FIG. 11, a plurality of flow paths A and B intersecting with each other are formed in the structure H, and the flow paths A and B are separated and independent from each other. Therefore, as shown in FIG. I will not contact you.

[0003]

In the conventional flow path structure as described above, it is necessary to secure a wall thickness t required for strength at the intersection, which is the closest part of the flow paths A and B, This wall thickness t needs to be increased as the pressure of the fluid passing through the flow paths A and B becomes higher, and as the wall thickness t increases, the width T1 of the fluid device also increases and the device itself becomes larger and heavier. And a wasted space is generated.

In the conventional example shown in FIGS. 11 and 12, the flow paths A and B are used.
Although the case where the intersections are orthogonal is taken up, the same can be said even if the intersections are not orthogonal, it is necessary to secure the minimum required thickness at the intersection. An object of the present invention is to provide a flow channel structure capable of forming a compact and lightweight fluid device in which the intersections of a plurality of flow channels can be made thin.

[0005]

[Means for Solving the Problems]

(1) In order to solve the above problems, the present invention adopts the following configurations. That is, in a flow channel structure having a plurality of passages formed in a structure and at least two of the plurality of flow channels intersect with each other, the two flow channels intersect each other so as to communicate with each other in the structure. Then, a block having a through hole in the same direction as the one flow path and separating and separating the two flow paths is inserted at the intersection of the one flow path of the two flow paths. Is fixed to the structure by a joining means, and a sealing means for preventing leakage between the flow paths is provided on the boundary surface of the block.

By thus inserting the block having the through hole at the intersection of the two flow paths, even if the two flow paths are formed so as to intersect and connect with each other, they are separated from each other.
Since it becomes an independent flow channel, the wall thickness between the flow channels at the intersection, which was conventionally required to separate and separate the two flow channels, is not required, and the cross section of the flow channel can be made thin, compact and lightweight. A fluid device can be configured.

Further, since there is no restriction on the wall thickness between the flow passages at the intersection, the positions of the plurality of flow passages can be freely decided, and the degree of freedom in design is greatly improved.

(2) The two flow paths may intersect or connect so that the axes intersect on the same plane, and the intersection portion becomes thinnest.

(3) When the other flow passage has a smaller diameter than that of the block and the block is located so as to divide the other flow passage, the other flow passage is left as it is in the other flow passage. Fluid does not flow. Therefore, in this case, an annular groove is formed in at least one of the opening of the other flow path and the outer peripheral portion of the block at the intersection of the two flow paths so that the fluid flows before and after the block of the other flow path. To form.

(4) The joining means is preferably one of metal flow, welding and screw fastening. Also,
A combination of these may be used.

(5) Further, it is preferable that the sealing means is any one of metal flow, welding, O-ring and sealing tape. Also, a combination of these may be used. When metal flow or welding is used as the sealing means, the joining means also serves as the sealing means, and a simple and inexpensive structure can be obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a structure serving as a main body of a flow path structure, and a flow path 2 having an inner diameter φd1 is provided in the structure 1.
And a flow path 3 having an inner diameter φd2 is formed.
3 intersect and communicate with each other such that their axes intersect on the same plane. Further, a counterbore 4 having an inner diameter of φD larger than the inner diameter φd1 is formed in the flow passage 2, and the counterbore 4 has a diameter of φD that can sufficiently withstand the pressure of the fluid flowing in the flow passages 2 and 3. A cylindrical block 5 having an outer diameter is inserted. The counterbore depth of the counterbore hole 4 is deeper than the intersection of the flow paths 2 and 3, and the block 5 is located at the intersection. In addition, a through hole 6 having the same inner diameter φd1 as the flow path 2 and in the same direction as the flow path 2 is formed in the block 5 so that the fluid flowing in the flow path 2 is not blocked by the block 5.

Grooves 5a and 5b for performing metal flow are formed at both ends of the block 5, and metal flow materials 7 and 8 such as copper, aluminum and soft iron are inserted into the grooves 5a and 5b, and the block 5 is placed at the upper end. When the metal flow material 7 and the metal flow material 7 are strongly pressed together, the metal flow materials 7 and 8 undergo plastic flow deformation at the positions shown in the figure, whereby the block 5 is firmly joined and fixed to the structure 1. The lower end of the block 5 is completely sealed by the metal flow material 8 and the upper end of the block 5 is completely sealed by the metal flow material 7. As described above, the metal flow materials 7 and 8 also serve as joining means for fixing the block 5 to the structure 1 and sealing means for preventing leakage between the flow paths 2 and 3.

The flow path 3 has a smaller diameter than the block 5 (φD> φd2), and the block 5 is positioned so as to divide the flow path 3. Therefore, as it is, only the leak flow from the small gap between the structure 1 and the block 5 flows before and after the block 5 of the flow path 3 and does not function as a flow path.
An annular groove 9 for bypass is formed by boring the opening of the channel 3 in the counterbore 4 of the channel 2 so that the fluid flows through the annular groove 9 before and after the block 5 of the channel 3. I have to. As a result, the flow paths 2 and 3 formed so as to intersect and communicate with each other are separated from each other and become independent flow paths.

FIG. 2 is a perspective view of the flow channel structure of FIG.
The fluid flowing in the flow path 2 passes through the through hole (flow path 6) of the inserted block 5, and the fluid in the flow path 3 flows on the outer periphery of the inserted block 5. The width T2 of the flow channel structure provided with these two flow channels 2 and 3 is the width T1 of the conventional flow channel structure shown in FIG.
Obviously smaller than.

In the present embodiment configured as described above, 2
By inserting the block 5 having the through hole 6 at the intersection of the two flow paths 2 and 3, the two flow paths 2 and 3 cross each other,
Even if they are formed so as to communicate with each other, they become separate and independent flow paths, and the wall thickness between the flow paths at the intersection, which is conventionally required to separate and separate the two flow paths, is unnecessary. For this reason, the intersection of the flow paths 2 and 3 can be made thin, and a compact and lightweight fluid device can be configured. In addition, the two flow paths 2 and 3 do not necessarily have to have the same axis on the same plane, but when the axes are on the same plane as in the present embodiment, the intersection can be thinnest.

The method of allowing the fluid to flow before and after the block 5 of the flow channel 3 does not depend only on the boring of the opening of the flow channel 3 of FIG. 1, and for example, as shown in FIG. It is also possible to form the annular groove 9A at a portion of the outer peripheral portion that intersects with the flow path 3.

Further, in the metal flow method, not only the metal flow material is inserted, but the material of the block itself may be metal-flowed by using a jig (described later), and the same effect can be obtained.

FIG. 4 shows a second embodiment, in which a bolt having a through hole is used as the joining means instead of the metal flow, and an O-ring is used as the sealing means instead of the metal flow to separate the flow paths. , Independent.

In FIG. 4, as in the first embodiment, in the structure 1, two flow paths 2 and 3 are formed which intersect and communicate with each other on the same plane, and the flow path 2 has a larger diameter than its inner diameter. A counterbore hole 4 having an inner diameter is formed, and a cylindrical block 5B having the same outer diameter as the inner diameter is inserted into the counterbore hole 4.

An O-ring taper is formed at the lower end of the block 5B, and the contact surface between the structure 1 and the lower end of the block 5B is sealed by an O-ring 20 inserted therein. The upper portion of the block 5B is pressed by a bolt 23 having a through hole 22, and the block 5B is joined and fixed to the structure 1 by the bolt 23. An O-ring taper is formed at the lower end of the bolt 23, and the contact surface between the structure 1 and the upper end of the block 5B is sealed by the O-ring 21 inserted therein.
Since the flow path 3 is divided by the block 5B as it is, the bypass annular groove 9 is formed by boring the flow path intersecting portion as in the first embodiment.
As described above, the flow paths 2 and 3 are separated and independent of each other, and the same effect as that of the first embodiment can be obtained.

A sealing tape may be used as a sealing means at the lower end of the block 5B instead of the O-ring. In this case, as shown in FIG. 5, the lower end of the block 5B may be slightly tapered and threaded, and the seal tape 25 may be wound around it and screwed to the structure 1. Further, although not shown, the upper end portion of the block may be screw-coupled to each other by using a sealing tape as a sealing means.

FIG. 6 shows a third embodiment in which silver brazing is used as a sealing means and a joining means instead of a metal flow,
By using welding such as copper brazing, the flow paths are separated and independent.

In FIG. 6, grooves 30 and 31 for filling the brazing material are formed at both ends of the block 5C. The brazing material such as silver or copper is filled in the grooves 30 and 31 and heated in a heating furnace. The brazing material melts due to the block 5C and the structure 1
Block 5 by flowing into the contact area with and solidifying it
Brazings 32a and 32b are formed at the lower end of C, and brazing 33 is formed at the upper end of the block 5C, whereby the block 5C is firmly joined and fixed to the structure 1. Also, the upper end of the block 5C is brazed 32a, 32
It is completely sealed by b, and the upper end of the block 5C is completely sealed by brazing 33. That is, the brazings 32a, 32b and 33 also serve as joining means for joining the block 5C to the structure 1 and sealing means for preventing leakage between the flow paths 2 and 3.

Also in this embodiment, the same effect as in the first embodiment can be obtained.

FIG. 7 and FIG. 8 show the fourth embodiment, and 2
The axes of the two flow paths do not necessarily have to be in the same plane.

In FIGS. 7 and 8, the two flow paths 2 and 3 formed in the structure 1 so as to intersect and communicate with each other are
The axes are misaligned because they are not on the same plane. Channel 2 is channel 2
A counterbore hole 4 having an inner diameter larger than the inner diameter is formed, and a cylindrical block 5D having the same outer diameter as the inner diameter is inserted into the counterbore hole 4.

Structures 1 located at both ends of the block 5D
Grooves 41, 4 for performing metal flow on the counterbore surface of
2 is formed and the material of the block 5D itself is subjected to plastic flow deformation (metal flow) using a jig, and the grooves 41 and 42 are formed.
The block 5D is firmly joined to, fixed to, and sealed by the structure 1 by flowing into the structure 1.

Further, since the axes of the flow paths 2 and 3 are deviated and the flow path 3 is not divided by the block 5D, the flow path 3 can function as a flow path as it is. Therefore, in this embodiment, the bypass annular groove as in the previous embodiment is not provided.

Also in this embodiment, the crossing portion can be made thinner than in the conventional case, and the same effect as in the first embodiment can be obtained.

Further, in this embodiment, there is no restriction on the wall thickness between the flow paths 2 and 3 at the intersection, and the distance between the axis centers of the flow paths 2 and 3 is free. The positions of the flow paths 2 and 3 can be freely determined, including the above-described embodiment in which the position is zero, which has the effect of significantly improving the degree of freedom in design.

9 and 10 show a fifth embodiment,
It shows a case where the axial centers of the two flow paths are in the same plane and an annular groove for bypass is unnecessary.

In FIGS. 9 and 10, two flow paths 2 and 3 are provided in the structure 1 so as to intersect and connect with each other on the same plane.
And a counterbore 4 having an inner diameter larger than the inner diameter of the channel 2 and smaller than the inner diameter of the channel 3 is formed in the channel 2.
A cylindrical block 5E having the same outer diameter as the inner diameter is inserted into the spot facing hole 4. Others are the same as those in the fourth embodiment.

As described above, even if the axial centers of the flow paths 2 and 3 are in the same plane, if the inner diameter of the flow path 3 is smaller than the outer shape of the block 5E, the flow path 2 may be provided without the bypass annular groove. , 3
Can be separated and independent channels.

According to this embodiment, the same effect as that of the first embodiment can be obtained without providing the annular groove for bypass.

[0038]

According to the present invention, the wall thickness between the flow passages at the intersections, which was conventionally required to separate and separate the two flow passages, is not required, so that the crossings of the flow passages can be made thin. A compact, lightweight fluid device can be configured.

Further, since there is no restriction on the wall thickness between the flow passages at the intersection, the positions of the plurality of flow passages can be freely determined, and the degree of freedom in design is greatly improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a flow channel structure according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the flow channel structure shown in FIG.

FIG. 3 is a cross-sectional view showing an embodiment in which an annular groove is provided on the block side.

FIG. 4 is a cross-sectional view of a flow channel structure according to a second embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of an essential part of an embodiment in which an end of a block is sealed with a sealing tape.

FIG. 6 is a sectional view of a flow channel structure according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a flow channel structure according to a fourth embodiment of the present invention.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a sectional view of a flow path structure according to a fifth embodiment of the present invention.

FIG. 10 is a sectional view taken along line XX of FIG. 7;

FIG. 11 is a perspective view of a conventional flow path structure.

12 is a cross-sectional view of the conventional channel structure shown in FIG.

[Explanation of symbols]

 1 structure 2,3 flow path 4 counterbore 5 block 5a, 5b groove 6 through hole 7,8 metal flow material 9 annular groove 20,210 ring 23 bolt 25 seal tape 30,31 groove 32a, 32b, 33 wax Attach 40, 41 groove

Claims (5)

[Claims] 1. A flow channel structure comprising a plurality of passages formed in a structure, wherein at least two of the plurality of flow channels intersect each other, wherein the two flow channels are connected to each other in the structure. And a through hole in the same direction as the one flow path is provided at the intersection of one of the two flow paths.
A block for separating and separating the two flow paths is inserted, the block is fixed to the structure by a joining means, and a sealing means for preventing leakage between the flow paths is provided on a boundary surface of the block. Channel structure. 2. The flow channel structure according to claim 1, wherein the two flow channels intersect and connect so that their axes intersect on the same plane. 3. The flow channel structure according to claim 1, wherein the other flow channel has a smaller diameter than the block, the block is positioned so as to divide the other flow channel, and A flow channel structure characterized in that an annular groove is formed in at least one of an opening of the other flow channel and an outer peripheral portion of the block at an intersection so that a fluid flows before and after the block of the other flow channel. . 4. The flow channel structure according to claim 1, wherein the joining means is one of metal flow, welding, and screw fastening. 5. The flow path structure according to claim 1, wherein the sealing means is any one of a metal flow, welding, an O-ring, and a sealing tape.