JP2022061385A - Compressed pneumatic circuit - Google Patents

Abstract

To provide a compressed pneumatic circuit capable of effectively eliminating drainage included in compressed air in a loop pipe conduit in which flow of the compressed air is uneven.SOLUTION: A compressed pneumatic pipe conduit 100 including an annular loop pipe conduit 10 to which compressed air is supplied from an air compressor 20 and which includes a plurality of bent portions 19a, 19b, 19c, 19d and is formed into a planar shape, and a distribution pipe conduit 13a connected to the loop pipe conduit 10 and distributing compressed air to a device 14a, further includes a drainage discharge portion 15a provided to at least one of the plurality of bent portions 19a, 19b, 19c, 19d and discharging drainage in the bent portions.SELECTED DRAWING: Figure 1

Description

The present invention relates to an annular compressed pneumatic circuit through which compressed air flows.

The compressed air discharged from an air compressor such as an air compressor contains a drain which is condensed water. Compressed air is used for pneumatic equipment such as air guns and cylinders, but if the compressed air contains such drainage, there is a risk of failure of these pneumatic equipment. The inclusion of drain in this way can be detrimental to the use of compressed air. Therefore, the drain in the compressed air is usually separated and removed from the compressed air by a drain trap as appropriate (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 11-182435

By the way, in recent years, for the purpose of reducing the energy consumption of the entire circuit, a compressed pneumatic circuit having a so-called loop pipeline having an annular conduit through which compressed air flows has been known. Due to its annular shape, this loop conduit has a plurality of bends that bend in a plane. In such a loop pipeline, the flow of compressed air tends to be stagnant at the bent portion as compared with the straight portion composed of a straight pipe, and the drain contained in the compressed air tends to stay.

The present invention has been made in view of such circumstances, and provides a compressed pneumatic circuit capable of effectively eliminating drain contained in compressed air in a loop pipeline in which the flow of compressed air is uneven. It is something to do.

The compressed pneumatic circuit according to the present invention is supplied with compressed air from an air compressor, includes a plurality of bent portions, is formed in a planar shape, and is connected to the loop pipe and compressed into a device. A compressed pneumatic pipe line provided with a dividing pipe line for distributing air, which is provided for at least one of the plurality of bent parts and is provided with a drain discharge part for discharging drain in the bent part. Will be.

With such a configuration, compressed air is supplied from the air compressor to the loop pipeline, and further, compressed air is supplied from the loop pipeline to the equipment through the branch pipeline, and the compressed air is used in the equipment. In the loop pipeline, the drain that stays in the bent portion is discharged by the drain discharge portion provided in the bent portion where the flow of compressed air tends to be stagnant.

In the compressed pneumatic circuit according to the present invention, the drain discharge portion includes a drain pipe hanging from the bent portion, and the drain pipe is outward with respect to the center line of the loop pipe of the bent portion. It can be configured to be connected to a position shifted to.

With such a configuration, at the bent portion, the drain that tends to move toward the outer pipe wall side with respect to the center line of the loop pipeline due to the centrifugal force due to the air flow is displaced outward with respect to the center line. It flows down through the drain pipe connected to and is discharged from the bent portion.

In the compressed pneumatic circuit according to the present invention, the loop pipeline may be arranged horizontally, and the drain discharge portion may be provided for each of the plurality of bent portions.

According to such a configuration, at each of the plurality of bent portions at the same height position of the horizontally arranged loop pipeline, the drain that stays due to the stagnation of the compressed air flow is discharged by the drain discharge portion. Will be done.

In the compressed pneumatic circuit according to the present invention, the loop pipeline is arranged so as to be inclined with respect to the horizontal plane, and the drain discharge portion is one or a plurality of bent portions other than the bent portion at the highest position among the plurality of bent portions. It can be configured to be provided in each of the bent portions.

With such a configuration, even if the drain discharge portion is not provided for the bent portion at the highest position, the drain in the bent portion at the highest position moves through the loop pipe due to the height difference, and other bending is performed. It can be discharged by a drain discharge part provided in the part.

In the compressed pneumatic circuit according to the present invention, the drain discharge portion may be configured to be provided for the bent portion at at least the lowest position among the plurality of bent portions.

With such a configuration, even if the drain discharge portion is not provided for the bent portion other than the bent portion at the lowest position, the drain in the bent portion other than the bent portion at the lowest position is a loop pipe due to the height difference. It travels through the road and can be drained by a drain drain provided at the lowest bend.

According to the compressed pneumatic pipeline according to the present invention, the flow of compressed air tends to be stagnant in the loop pipeline, and the drain contained in the compressed air tends to stay in the bent portion due to the drain discharge portion provided in the bent portion. Since the drain is discharged, the drain contained in the compressed air can be effectively removed in the loop pipeline where the flow of the compressed air is uneven.

It is a perspective view which shows the structure of the compressed pneumatic pipeline which concerns on embodiment of this invention. FIG. 2 is a perspective view showing the appearance of a three-way joint provided at each corner of the compressed pneumatic pipeline shown in FIG. FIG. 3 is a cross-sectional view showing the internal structure of the three-way corner joint shown in FIG. FIG. 4 is a cross-sectional view showing an enlarged portion of the bent portion in the loop pipeline in terms of the positional relationship between the drain pipeline connected to the loop pipeline and the accumulated drain. FIG. 5 is a diagram showing a plane and a side surface of a compressed pneumatic pipeline according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The compressed pneumatic pipeline according to the first embodiment of the present invention is configured as shown in FIG.

In FIG. 1, the compressed pneumatic circuit 100 has an annular loop pipeline 10 formed in a plane. The loop pipeline 10 is formed as a substantially rectangular pipeline having four corners C1, C2, C3, and C4. The loop pipeline 10 is installed in a state of being horizontally maintained by a suspension mechanism (not shown) and / or a support mechanism (not shown).

The loop pipeline 10 includes a plurality of straight pipes 11a, 11b, 11c, 11d, 11e, 11f, 11g, 11h, 11i, and three-way corner joints 18a, 18b, 18c arranged in four corners C1, C2, C3, C4. , 18d and formed by connecting a plurality of three-way joints (cheese) used for pipeline branching. For example, in the three-way corner joint 18a arranged in the corner C1, as shown in FIG. 2, two straight pipes 11a and 11i are connected at an angle of approximately 90 ° in the same plane, and the straight pipes 11a and 11i are connected. The drain pipe line 16a constituting the drain discharge portion 15a described later is connected in the direction orthogonal to the plane formed by. Similarly in other corners, in the corner C2, the three-way corner joint 18b connects the two straight pipes 11c and 11d and the drain pipe line 16b (drain discharge portion 15b), and in the corner C3, the three-way corner joint 18c is connected. The two straight pipes 11e and 11f are connected to the drain pipe line 16c (drain discharge portion 15c), and even in the corner C4, the three-way corner joint 18d is the two straight pipes 11g, 11h and the drain pipe line 16d (drain discharge). It is connected to the part 15d).

Between the corners C1 and C2, a straight pipe 11a extending from the three-way corner joint 18a (corner C1), a straight pipe 11c extending from the three-way corner joint 18b (corner C2), and a straight pipe 11b arranged between them. And are connected in a straight line. A base pipe line 21 extending from the air compressor 20 is further connected to a three-way joint (cheese) connecting the straight pipe 11a and the straight pipe 11b, and further divided into a three-way joint connecting the straight pipe 11b and the straight pipe 11c. The piping line 13a is connected. A drain trap 22 for draining the drain is connected to the baseline 21. Further, an air gun 14a as a pneumatic device is connected to the distribution pipe line 13a.

Between the corners C2 and C3, the straight pipe 11d extending from the three-way corner joint 18b (corner C2) and the straight pipe 11e extending from the three-way corner joint 18c (corner C3) are linearly connected. A branch pipe line 13b is further connected to a three-way joint connecting these two straight pipes 11d and 11e. An air gun 14b as a pneumatic device is connected to the distribution pipe line 13b. Between the corners C3 and the corners C4, a straight pipe 11f extending from the three-way corner joint 18c (corner C3) and a straight pipe 11g extending from the three-way corner joint 18d are linearly connected. A branch pipe line 13c is further connected to a three-way joint connecting these two straight pipes 11f and 11g. An air gun 14c as a pneumatic device is connected to the distribution pipe line 13c. Further, between the corner C4 and the corner C1, the straight pipe 11h extending from the three-way corner joint 18d (corner C4) and the straight pipe 11i extending from the three-way corner joint 11a are linearly connected. A branch pipe line 13d is further connected to a three-way joint connecting these two straight pipes 11h and 11i. An air gun 14d as a pneumatic device is connected to the distribution pipe line 13d.

As shown in FIG. 3, the three-way corner joint 18a arranged at each corner, for example, the corner C1, includes a bent portion connecting the two straight pipes 11a and 11i at an angle of approximately 90 ° as the bent portion 19a. Then, in the three-way corner joint 18a, the drain pipe line 16a is connected to a position shifted outward with respect to the center line CL of the loop pipe line 10 of the bent portion 19a. Similar to the corner C1, the other corners are arranged in the corner C2, and in the three-way corner joint 18b including the bent portion 19b, the drain pipe line 16b is relative to the center line CL of the loop pipe line 10 of the bent portion 19b. In a three-way corner joint 18c that is connected to a position displaced outward and is arranged at the corner C3 and includes a bent portion 19c, the drain pipe line 16c is relative to the center line CL of the loop pipe line 10 of the bent portion 19c. In the three-way corner joint 18d including the bent portion 19d, which is connected to the position displaced outward and is arranged in the corner C4, the drain pipe line 16d is the center line of the loop pipe line 10 of the bent portion 19d. It is connected to a position shifted outward with respect to Cl.

The drain pipes 16a, 16b, 16c, 16d provided in the corners C1, C2, C3, and C4 are bent portions 19a in a state where the loop pipe 10 having the above-mentioned structure is installed so as to maintain the level. , 19b, 19c, 19d (three-way corner joints 18a, 18b, 18c, 18d) hang down, and drain traps 17a, 17b, 17c, 17d are connected to the tips thereof. The drain pipeline 16a (16b, 16c, 16d) provided for each corner portion C1 (C2, C3, C4) and the drain trap 17a (17b, 17c, 17d) connected to the drain pipe line 16a (16b, 16c, 16d) are bent portions 19a (19b, 19b). It constitutes a drain discharge unit 15a (15b, 15c, 15d) that discharges the drain in 19c, 19d).

In the above-mentioned compressed pneumatic pipe line 100, the compressed air from the air compressor 20 is supplied to the loop pipe line 10 through the base pipe line 21. Then, the compressed air in the loop pipeline 10 is distributed to the air guns 14a, 14b, 14d, 14d through the respective distribution pipelines 13a, 13b, 13c, 13d. When the air gun 14a (14b, 14c, 14d) is operated, compressed air flows from the loop line 10 through the branch line 13a (13b, 14c, 14d), and compressed air is discharged from the air gun 14a (14b, 14c, 14d). do. The compressed air discharged from the air gun 14a (14b, 14c, 14d) is used, for example, for removing chips generated from various machine tools, removing dust adhering to the product surface, and the like.

In such a compressed pneumatic pipeline 100, the bent portions 19a, 19b, 19c, 19d (three-way corner joints 18a, 18b) of the corners C1, C2, C3, and C4 in which the flow of compressed air tends to be stagnant in the loop pipeline 10 Drain staying in the bent portions 19a, 19b, 19c, 19d flows down through the drain pipelines 16a, 16b, 16c, 16d provided in 18c, 18d). Then, the drain flowing down the drain pipes 16a, 16b, 16c, 16d flows into the drain traps 17a, 17b, 17c, 17d and is discharged.

According to the compressed pneumatic pipeline 100 as described above, the flow of the compressed air tends to be stagnant in the loop pipeline 10, and the drain contained in the compressed air tends to stay in the bent portions 19a of the corners C1, C2, C3, and C4. , 19b, 19c, 19d (three-way corner joints 18a, 18b, 18c, 18d), drain discharge portions 15a, 15b, 15c, 15d (drain pipelines 16a, 16b, 16c, 16d, and drain traps 17a, 17b). , 17c, 17d) discharges the drain that stays in the bent portions 19a, 19b, 19c, 19d. Can be eliminated.

Further, in each bent portion 19a (19b, 19c, 19d) of the loop pipeline 10, as shown in FIG. 4, the drain W contained in the compressed air due to the centrifugal force due to the flow of the compressed air is the drain W of the loop pipeline 10. It is easy to approach the outer pipe wall side with respect to the center line CL. In each corner C1 (C2, C3, C4), the drain line 16a (16b, 16c, 16d) is the loop line of the bent portion 19a (19b, 19c, 19d) as shown in FIG. 3 together with FIG. It is connected to a position shifted outward with respect to the center line CL of 10. As a result, the drain that tends to approach the outer pipe wall side of each bent portion 19a (19b, 19c, 19d) can more reliably flow down the drain pipe line 16a (16b, 16c, 16d). Therefore, the drain contained in the compressed air can be more effectively removed in the loop pipeline 10 in which the flow of the compressed air is uneven.

In the compressed pneumatic pipe line 100 described above, the drain discharge portions 15a, 15b, 15c, 15d (drain pipes) are provided for all four corners C1, C2, C3, and C4 (bent portions 19a, 19b, 19c, 19d). Roads 16a, 16b, 16c, 16d and drain traps 17a, 17b, 17c, 17d) are provided, but are not limited thereto. A drain discharge portion may be provided at least one of the four corners C1, C2, C3, and C4 (bent portions 19a, 19b, 19c, 19d).

Further, the shape of the loop pipeline 10 is generally rectangular with four corners C1, C2, C3, and C4, but is not limited thereto. The loop line 10 may have a polygonal shape having three corners or five or more corners.

The compressed pneumatic circuit according to the second embodiment of the present invention will be described with reference to FIG.

The compressed pneumatic circuit according to the second embodiment of the present invention is characterized in that the annular loop pipeline 10 formed in a plane is installed in a state of being inclined with respect to a horizontal plane.

In FIG. 5, the compressed pneumatic circuit has a generally rectangular loop line 10 having four corners C1, C2, C3, and C4, as in the first embodiment. In the corner C1, the L-shaped joint (elbow) forms a pipeline including the bent portion 19a, and in the other corners C2, C3, and C4, as in the case of the first embodiment, the three-way corner joints 18b, 18c, The 18d forms a conduit including the bent portions 19b, 19c, 19d. The loop pipeline 10 is inclined at a predetermined angle in the extending direction of the diagonal line DL passing through the bent portions 19a (corner C1) and 19c (corner C3) by the suspension mechanism (not shown) and / or the support mechanism (not shown). It is installed in the state of being. The bent portion 19a (corner C1) is at the highest position (height h1), and the bent portion 19c (corner C3) is at the lowest position (height h3). The bent portion 19b (corner C2) is located at a position (height h2) lower than the bent portion 19a (corner C1), and the bent portion 19d (corner C4) is lower than the bent portion 19b (corner C2) and is bent. It is located higher than 19c (corner C3) (height h4). That is, the relationship between the heights of the bent portions 19a to 19d is h1> h2> h4> h3.

In the loop pipe 10 installed at an inclination as described above, the drain pipe is not connected to the bent portion 19a (L-shaped joint (elbow)) of the corner C1 at the highest position (h1). In the corners C2, C3, and C4 other than the corner C1 (bent portion 19a), the three-way corner joints 18b, 18c, 18c including the bent portions 19b, 19c, 19d are the same as in the first embodiment (FIGS. 2 and 3). The drain pipelines 16b, 16c, 16d are connected so as to hang down from the corresponding bends.

Compressed air is supplied from the air compressor 20 to the loop pipeline 10 as described above through the baseline pipeline 21 as in the first embodiment. In FIG. 5, the dividing pipe line connected to the loop pipe line 10 and the pneumatic equipment (for example, an air gun) following the pipe line are omitted.

In the compressed pneumatic pipeline having the loop pipeline 10 installed in the inclined state as described above, in the bending portions 19b, 19c, 19d other than the bending portion 19a at the highest position (h1) of the loop pipeline 10. As in the first embodiment, the stagnant drain flows down the drain pipes 16b, 16c, 16d, and the drains flowing down the drain pipes 16b, 16c, 16d flow down into the drain traps 17b, 17c, 17d. It flows in and is discharged. Further, the drain of the bent portion 19a at the highest position (h1) of the loop pipe 10 moves through the loop pipe 10 due to the height difference, and the drain pipe provided for the other bent portions 19b, 19c, 19d. It can be discharged by the roads 15b, 15c, 15d and the drain traps 17b, 17c, 17d (drain discharge section).

As described above, according to the compressed air pipeline according to the second embodiment, a drain discharge portion (drain pipeline, drain trap) is provided for the bent portion 19a (corner C1) at the highest position (h1). Even if it is not present, the drain in the bent portion 19a (corner C1) at the highest position moves through the loop pipe line 10 due to the height difference, and the drain pipe provided for the other bent portions 19b, 19c, 19d. It can be discharged by the roads 15b, 15c, 15d and the drain traps 17b, 17c, 17d (drain discharge section). Therefore, it is possible to simplify the structure of the compressed pneumatic circuit while maintaining the effect that the drain contained in the compressed air can be effectively removed in the loop pipeline 10 in which the flow of the compressed air is uneven. can.

In the above-mentioned compressed pneumatic circuit, the drain discharge portion (drain pipeline, drain trap) for the bent portion 19a (corner C1) at the highest position (h1) of the inclined loop pipeline 10 is omitted. Not limited. The drain discharge portion for any of the bent portions can be omitted except for the bent portion 19c (corner C3) at the lowest position (h3) of the inclined loop pipeline 10.

Further, the shape of the loop pipeline 10 is not limited to a substantially rectangular shape as in the first embodiment, and the inclination direction of the loop pipeline 10 can be determined in any direction.

Although the embodiments of the present invention have been described above, each embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments described above can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments are included in the scope and gist of the invention, as well as in the invention described in the claims.

As described above, the compressed air pressure circuit according to the present invention has the effect of being able to effectively eliminate the drain contained in the compressed air in the loop pipeline where the flow of the compressed air is uneven. It is useful as an annular compressed pneumatic circuit through which compressed air flows.

10 Loop pipeline 11a to 11i Straight pipe 13a to 13d Minute pipeline 14a to 14d Air gun 15a to 15d Drain discharge part 16a to 16d Drain pipe line 17a to 17d Drain trap 18a to 18d Three-way corner joint 19a to 19d Bending part 20 Air compression Machine 21 Base pipeline 22 Drain trap 100 Compressed air pipeline

Claims (5)

An annular loop conduit that is supplied with compressed air from an air compressor, contains multiple bends, and is formed in a planar shape.
A compressed pneumatic pipeline provided with a distribution pipeline connected to the loop pipeline and distributing compressed air to the equipment.
A compressed pneumatic pipeline provided for at least one of the plurality of bent portions and provided with a drain discharge portion for discharging the drain in the bent portion. The drain discharge portion includes a drain pipe hanging from the bent portion, and includes a drain pipe.
The compressed pneumatic pipeline according to claim 1, wherein the drain pipeline is connected to a position of the bent portion that is outwardly displaced with respect to the center line of the loop pipeline. The loop pipeline is arranged horizontally and
The compressed pneumatic circuit according to claim 1 or 2, wherein the drain discharge portion is provided for each of the plurality of bent portions. The loop pipeline is arranged at an angle with respect to the horizontal plane.
The compressed pneumatic circuit according to claim 1 or 2, wherein the drain discharge portion is provided in each of one or a plurality of bent portions other than the bent portion at the highest position among the plurality of bent portions. The compressed pneumatic circuit according to claim 4, wherein the drain discharge portion is provided for a bent portion at at least the lowest position among the plurality of bent portions.

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