JPH0730880B2 - Compressed air supply piping system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a compressed gas supply piping system, and more particularly to a compressed air supply piping system suitable for supplying compressed air.

[Conventional technology]

Air compressors that use compressed air as a power source are extremely widely used because they are relatively easy to handle and maintain. In particular, the air compressor can be operated at high speed and can obtain a high output in a short time, so that it is often used in an assembly line, a working process, etc. in order to save labor and automate the factory.

In the case of pneumatic equipment such as an air gun, an air driver, an air cylinder, and other automated equipment that directly uses air pressure, in a factory or the like having a relatively small scale, compressed air is directly sent from a compressor to an air compressor. Sixth
The figure shows a principle example of a conventional compressed air supply piping system for supplying compressed air directly from a compressor to pneumatic equipment. The principle of the compressed air supply system is the same regardless of the size of the piping, but since the whole description is easy, a small-scale piping system will be taken as an example.

In FIG. 6, the compressor 10 arranged on the wall of the working chamber compresses the atmosphere into compressed air of about 5 to 10 kg / cm ² and sends it to the pipe 12 connected to the discharge port. The pipe 12 is generally made of a steel pipe, extends along the wall surface 14 to the ceiling 16, and then is arranged along the ceiling 16. And, in the pipe 12, cheese for branching provided in various places
A branch pipe 20 is connected via 18. This branch pipe 20
A coil unit 22 that is installed substantially orthogonal to the pipe 12, extends along the ceiling 16 toward the center of the work chamber, and connects a pneumatic device such as an air driver (not shown) to the end.
Is provided.

Further, at a plurality of places of the pipe 12, a joint cheese 24 for hose extraction is provided, and a working hose 26 and a coil unit 28 are connected to the joint cheese 24. Air guns 30, 32 for injecting compressed air from 10 are connected.

On the other hand, the end portion of the pipe 12 is suspended along the wall surface 34. A drain cock 36 is attached to the end of the pipe 12, and a work hose unit 38 is connected to the drain cock 36.

In the compressed air supply piping system configured as described above, the air compressed by the compressor 10 is supplied to the piping 12 and the branch pipe.
It is led to the work hose and coil unit via 20 and supplied to pneumatic equipment such as an air gun connected to the work hose and coil unit.

However, since the compressor 10 compresses the atmosphere and discharges high-pressure air, drainage occurs in the pipe 12 while using pneumatic equipment such as the air guns 30 and 32. That is, the compressed air discharged from the compressor 10 is compressed air containing water, and generally contains saturated steam or steam close thereto. Moreover, since the compressed air in the compressor 10 has a high temperature of approximately 60 ° C or higher due to adiabatic compression, the vapor in the compressed air does not condense, and the compressor 10
It is sent out into the pipe 12 through the tank together with the oil vapor from. When the hot compressed air flows through the pipe 12, it is further cooled to a temperature below the dew point temperature due to the ambient temperature, and water and oil are condensed to form a drain. This drain is connected to the pipe 12 and the branch pipe 20 along the ceiling 16.
Drain cock 3 at the end of pipe 12 with a slope of about 1/100
The drain cock 36 is opened about once a day (usually before work in the morning) to discharge the drain.

However, drainage occurs in the pipe after drainage depending on the season and temperature. Therefore, when using pneumatic equipment such as the air guns 30 and 32, a lot of compressed air flows into the equipment being used, and this inflowing compressed air drags the drain generated in the piping and is generated depending on the amount of air used. The drain more than the drain enters the pneumatic equipment and is ejected from the pneumatic equipment being used, which causes a problem of adversely affecting the operation of the product or the pneumatic equipment. Therefore, in practice, as shown by reference numerals 54 and 56 in FIG. 7, which will be described later, a pneumatic device is used with a filter suitable for the device used at the end of the pipe. The same result is obtained because the reservoir capacity is too small.

Therefore, in order to obtain highly accurate compressed air with less water content, a supply piping system as shown in Fig. 7 has been adopted as the most popular method recently (for example, it is also proved by an authoritative manufacturer's catalog, etc.). Be done).

In FIG. 7, the compressor 10 includes a water-cooled aftercooler 40 for cooling compressed air, an air tack 42 for storing compressed air, a main filter 44 for removing dust and the like in the compressed air, and a main pipe 46. It is connected in series via.
A refrigeration type air dryer 48 is connected to the outlet side of the main filter 44, and the compressed air is further cooled to condense and remove water and oil in the compressed air, and dry compressed air is obtained. Is done. A plurality of branch pipes 50 and 52 are connected to the main pipe 46.

The branch pipe 50 is connected to pneumatic equipment 58, 60 via filters 54, 56.
The branch pipes 62, 64 provided with are connected. Then, the filters 54 and 56 remove rust, dust and the like in the compressed air generated in the respective pipes made of steel and supply clean compressed air to the pneumatic devices 58 and 60.

A drain cock 36 is provided at the lower end of each branch pipe 50, 52 so that the drain inside the pipe can be discharged to the outside. The connecting portion between the branch pipe 50 and the main pipe 46 is formed in an inverted U shape to form a portion higher in position than the main pipe 46 so that the drain generated in the main pipe 46 does not flow into the branch pipe 50. ing.

The compressed air supply piping system configured as described above cools the compressed air sent from the compressor 10 by the aftercooler 40, and after condensing the water content and the oil content in the compressed air,
It is sent to the air tank 42 so that compressed air having a predetermined pressure is obtained. Then, the compressed air discharged from the air tank 42, after dust and rust etc. are removed by the main filter 44, is further cooled by the air dryer 48 to become dry compressed air in which moisture and oil are separated, and the main pipe 46, the branch Pneumatic equipment 58, 60 is supplied via pipe 50.
That is, in this system tem, a solution is adopted in which the drain is removed at the source of compressed air to suppress the generation of drain.

[Problems to be Solved by the Invention] However, the compressed air supply piping system using the protective equipment such as the aftercooler 40 and the air dryer 48 as described above is several times the piping cost because expensive protective equipment is used. It requires equipment cost and operation cost is high. Moreover, since a plurality of protective devices are used, their maintenance and management are not easy.

Further, although the compressed air that has been dried is obtained by the air dryer 48, the compressed air that has passed through the air dryer 48 is
The dew point is limited to 4 to 10 ° C, and drainage is unavoidable in the pipes in cold regions or in winter (this means that the main pipe 46 and the branch pipe 50 have an inverted U-shape). It is proved that it is diverged by a straight pipe).

That is, the compressed air is obtained by supplying energy from the compressor 10, and discarding the compressed air existing in the pipe wastes energy. Therefore, even when the factory is not operating at night,
Compressed air is maintained in each pipe. However, when indoor heating is stopped in cold regions or during winter nights, the indoor temperature drops to near zero or below, and the compressed air dried by the air dryer 48 is cooled to below the dew point temperature. Drain occurs inside.

Further, the connecting portion between the main pipe 46 and the branch pipe 50 is formed in an inverted U shape so that the drain in the main pipe 46 does not flow into the branch pipe 50, but the pneumatic devices 58 and 60 should still be used. Therefore, a large amount of compressed air may flow through the branch pipe 50 and the branch pipes 62, 64 to convey the drain, and the drain generated in the main pipe 46 and the like may be jetted from the pneumatic devices 58, 60. For this reason, generally, filters 54 and 56 are provided near the ends of the branch pipes 62 and 64 so that the drains in the compressed air are captured by the filters 54 and 56, and the drainage is made much larger than that shown in FIG. Pneumatic equipment that allows less and longer use 5
Although it prevents the drain from spouting from 8, 60,
The piping system becomes more complex and expensive. In addition, before that, filters or separators were installed at the rear line or end of the water-cooled aftercooler, but in any case, it is necessary to install drainage drains everywhere, and drains should be treated at each drainage port. Management is difficult because it must be done. In particular, as the scale of piping increases, the drainage outlets will be tens and hundreds, making maintenance and management difficult.

That is, the conventional piping system suppresses the generation of drain at the supply source of compressed air by the aftercooler and the air dryer, and the drain generated in the subsequent piping is drained at the drain port or the end of the separator or filter close to the generation location. It is treated by so-called symptomatic treatment, which is discharged from the mouth, and is not a fundamental solution that allows simple drain treatment.

For this reason, it is desirable that the drain be concentrated only by piping, ideally in one place, and do not require management. In principle, it should be maintenance-free, which reduces the total equipment cost. It becomes a fundamental solution instead of symptomatic treatment.

The present invention has been made to solve the above-mentioned drawbacks of the prior art. The drain generated in the pipe is separated by the pipe itself, and is always automatically concentrated at the end of the pipe system, and the drain is ejected from the pneumatic equipment. It is an object of the present invention to provide an inexpensive compressed air supply piping system that does not do so.

[Means for Solving the Problems]

The cause of the above problem is that the piping itself from the main to the end of the line acts as a heat exchanger, which causes drainage everywhere in the piping and also rubber-like things including rust. It depends. In order to achieve the above-mentioned object, the inventor of the present application takes this drawback as an advantage,
This was done because we thought that a fundamental solution could be achieved by compensating for the shortcomings, and the compressed air supply piping system according to the present invention communicates the compressed air supply source with the drain port and guides compressed air to pneumatic equipment. And an upper supply pipe for connecting to the compressed air source and the drain port located below the upper supply pipe to form a loop in cooperation with the upper supply pipe, and water generated in the compressed air. Between the drain-cum-supply pipe that guides the drain (including oil and others) to the drain port, the connection part between the equipment pipeline connecting the air compressor and the upper-supply pipe, and the drain-cum-supply pipe. And a connecting member which communicates with each other and guides a drain mainly composed of water condensed in the upper supply pipe to the drain-cum-supply pipe by a gravity falling function. The connecting member may be provided with a filter for capturing liquid particles of compressed air, dust, and dirt.

[Action]

According to the present invention configured as described above, when the pneumatic equipment is used, the drain generated in the upper supply pipe is carried by the compressed air flowing through the upper supply pipe, and the equipment pipe line connecting portion of the supply pipe and the drain. By the connecting member communicating with the dual-purpose supply pipe, it is automatically guided to the dual-purpose supply pipe by the gravity falling function. Then, when the equipment on the downstream side near the drain port is used, the drain in the drain / supply pipe is automatically conveyed to the drain port by the compressed air flowing through the pipe and collected, and the drain port opens. Then, the compressed air ejected from the drain port is discharged to the outside. Therefore, for example, by attaching an auto drain device to the drain port, it is possible to automatically treat the drain generated in the supply pipe, and the drain does not spout from the end of the compressed air supply pipe, and the upper supply pipe It is possible to prevent the adverse effects such as the discharge of the drain from the pneumatic device connected to the device and the adverse effects on the operation of the product and the pneumatic device. Moreover, the drain-combined supply pipe is connected to the compressed air supply source and the drain port together with the upper supply pipe to form a loop to form an endless compressed air supply path, so that the amount of compressed air stored in the piping system is reduced. In addition, the supply direction is not limited to one direction in the past, but it can be supplied from multiple directions as well as the reverse direction, so even if a large amount of air is suddenly needed (for example, air blow, etc.), the supply located ahead of it Since the pneumatic equipment in the piping is not extremely reduced in pressure, no malfunction will occur. As such, it is possible to reduce pressure fluctuations due to the use of equipment and the like.

Further, when a filter for removing liquid particles from the compressed air is provided in the connecting member, cleaner and dry compressed air can be taken out, and the effect can be further enhanced.

〔Example〕

A preferred embodiment of the compressed air supply piping system according to the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are given to the parts described in the above-mentioned prior art,
The description is omitted.

FIG. 1 is an explanatory diagram of a compressed air supply piping system according to a first embodiment of the present invention.

In FIG. 1, a supply pipe 70, one end of which is connected to a compressor 10 which is a compressed air supply source, has a ceiling 16 along a wall surface 14.
A rising part 72 extending up to, a main supply pipe 74 which constitutes an upper supply pipe arranged along the ceiling 16, and a standdown which is lowered from the end of the main supply pipe 74 along the wall surface 34. Department
It consists of 76. The supply pipe 70 is made of, for example, a pressure-resistant tube made of nylon or the like that does not corrode.
Note that the main supply pipe 74 does not need to have a slope of about 1/100 so that the rising part 72 side is higher than the falling part 76 side unlike the prior art described in FIGS. 6 and 7. , May be horizontal piping.

Multiple locations in the main supply pipe 74 (two locations in the case of the embodiment)
There are branching cheeses 78 and 80 in this branching cheese.
Supply branch pipes 82, 84 having a coil unit 22 forming a pipe line for an equipment at the tip are connected via 78, 80. Further, the main supply pipe 74 is provided with joint cheeses 86 and 88 at a plurality of places (two places in the case of the embodiment), and the work hoses that constitute the equipment pipelines at these joint cheeses 86 and 88. 26,
The coil unit 28 is connected.

On the other hand, the main supply pipe 74 and the supply branch pipes 82, 84 of the supply pipe 70.
A drain pipe is arranged below the pipe, and it has a double pipe structure, and has a reverse U-shaped pipe at the connecting portion between the main supply pipe 74 and the supply branch pipes 82 and 88 which is conventionally required, and 1 / Eliminating the troublesome plumbing work such as 100 graded plumbing allows for neat piping.

That is, below the main supply pipe 74, the main drain pipe 90 that constitutes the drain-use supply pipe is arranged in parallel. Then, in the main drain pipe 90, the branch cheese 9 corresponding to the position where the branch cheeses 78, 80 of the main supply pipe 74 are provided.
2 and 94 are provided, and drain branch pipes 96 and 98 are connected to these branching cheeses 92 and 94.

The drain branch pipes 96, 98 are provided along the supply branch pipes 82, 84, and have their ends communicating with the front end portions of the supply branch pipes 82, 84 via joints 100, 102 which are connecting members. Branch pipe 8
Drain branch pipes 96, 98 obtained by gravity drop function from 2, 84
The drain inside is guided to the main drain pipe 90. Further, connecting pipes 104, 106 as connecting members are provided between the branching cheeses 78, 80 of the main supply pipe 74 and the branching cheeses 90, 92 of the main drain pipe 90. , 106 guides the drain in the main supply pipe 74 to the main drain pipe 90 by a gravity falling function.

Further, the main drain pipe 90 corresponds to the branch cheeses 108, 110 corresponding to the portions of the main supply pipe 74 where the joint cheeses 86, 88 are provided.
Is provided with this branching cheese 108, 110 and joint cheese 8
6, 88 are connected by a connecting pipe that connects the main supply pipe 74 and the main drain pipe 90.

The main drain pipe 90 has one end (air inlet side) connected to the upper part of the rising portion 72 of the supply pipe 70 via a joint 112, and the end side connected to the vicinity of the end of the main supply pipe 74 via a joint 114. I am doing it. In addition, a vertical drain pipe 116 is connected to the joint 114, and the drain in the main drain pipe 90 is connected to the vertical drain pipe 11.
The drain cock 36 attached to the lower end of 6 is guided.

The operation of the embodiment configured as described above is as follows.

The compressed air discharged from the compressor 10 fills a supply piping system that supplies compressed air to pneumatic equipment such as the air guns 30 and 32 and a drain piping system through which a drain flows. Then, the drain condensed in the main supply pipe 74 of the supply pipe 70 moves with respect to the flow of compressed air when the pneumatic equipment is used, and the connecting pipes connected to the branching cheeses 78, 80 and the joint cheeses 108, 110. It flows down into the main drain pipe 90 through 104, 106, etc. by the gravity falling function.

On the other hand, the drain generated in the supply branch pipes 82 and 84 is
Since 2 and 84 are connected to the main supply pipe 74, if the pneumatic device is not connected to the coil unit 22 or if the connected pneumatic device is not used, the main supply pipe
From the 74 side through the connecting pipes 104, 106 to the main drain pipe 90 by gravity drop function, or the joints 100, 10 at the tip end.
2. Flow into the main drain pipe 90 through the drain branch pipes 96 and 98. Further, when a pneumatic device connected to the coil unit 22 is used, the drain in the supply branch pipes 82, 84 is
Supply branch pipe 8 with compressed air flowing towards pneumatic equipment
It moves in the direction of the tip of 2, 84 and flows down into the drain branch pipes 96, 98 through the joints 100, 102 by the gravity falling function. The drain that has entered the drain branch pipes 96 and 98 flows through the drain branch pipes 96 and 98 to the main drain pipe 90 side.

When discharging the drain in the main drain pipe 90, the drain cock 36 provided at the lower end of the vertical drain pipe 116 is opened to eject the compressed air. As a result, the drain in the main drain pipe 90 is conveyed to the drain cock 36 by the compressed air flowing in the main drain pipe 90 and discharged to the outside.

In this way, by providing a supply piping system for supplying compressed air to the pneumatic equipment and a drain piping system for conveying the drain to form a double piping system, the drain generated in the supply piping system is
It can be automatically guided to the drain piping system via the connecting pipes 104, 106, etc., and has a function of separating and transporting the drain regardless of the season and ambient temperature, and becomes a piping system, which is treated at the conventional drain generation points respectively. Unlike the symptomatic treatment, the drainage is extremely easy to manage and process.

Further, since the drain flows through the drain piping system rather than the compressed air supply piping system, it is possible to prevent the drain from being ejected from the pneumatic equipment connected to the supply piping system. Therefore, in the embodiment, since the drain pipe terminal always has the function of performing drainage treatment, not only the conventional water-cooled aftercooler but also the refrigeration air dryer, the line filter,
Even the separator can be omitted, and the installation cost and maintenance management cost of the piping system can be significantly reduced. Moreover, the double piping structure has an advantage that the air capacity is increased by the amount corresponding to the drain piping system. For this reason, when the allowable pressure fluctuation is the same as the conventional one, the pipe diameter may be reduced accordingly.

In addition, since it is a double pipe, the pipe cost is not necessarily doubled. For example, when the supply pipe diameter is large, the drain pipe diameter may be a fraction of the supply pipe system, as will be described later. In addition, when the supply pipe system is arranged in a grid, it is possible to use less drain system pipe than the supply system, and if the design and construction are performed according to the site, the total equipment cost will be very low. Moreover, in the case of a small diameter, the nylon pipe may be used instead of the steel pipe pipe, and since there is no need to make a gradient in the pipe, if there is a tube system manual, the pipe construction can be done without the need for a specialist. Can be done, and the construction cost is very low. Also,
Nylon piping has the advantage that the pressure drop is small because the inside of the tube is smooth and the flow resistance is low.

Another advantage of nylon pipes is that, unlike steel pipes, they do not rust, so rubber-like substances due to rust generated in the middle of pipes do not occur, and more clean gas can be retained. With respect to this point, in the steel pipe piping, not only the drain but also the terminal treatment cannot be totally performed even in the typical system shown in FIG.
The terminal filter shown in is needed in addition to the drain. In addition, it is known that steel pipes are used as a rule in compressed air supply systems, and dust that cannot be ignored due to the use of steel pipes is generated in the pipeline along the way.To remove this, a filter is required. If it is not possible, it will be impossible, and the filter will become clogged, so its management will be difficult. Further, in large-scale steel pipe piping, rust is often generated, so depending on the method, it may be a difficult piping work.

In addition, although the double piping structure has been described in the above embodiment, it is needless to say that the piping structure having three or more layers may be adopted.

FIG. 2 is a perspective view schematically showing a part of the second embodiment of the present invention.

In FIG. 2, reference numerals 120 and 122 denote supply pipes for supplying compressed air to the pneumatic equipment, which branch from a main supply pipe (not shown in the figure) connected to the compressor and arranged substantially parallel to each other. There is. Further, the supply pipes 120 and 122 are arranged substantially horizontally without being inclined, as in the above embodiment. The supply pipe 120 and the supply pipe 122 are connected to each other by communication pipes 124 and 126 at a plurality of points.

On the other hand, below the middle of the supply pipe 120 and the supply pipe 122,
A drain pipe 128 is arranged. This drain pipe 128 is
The supply pipes 120, 122 communicate with the supply pipes 120, 128 via the connection pipes 130a, 130b, 132a, 132b and the like.
The drain created by the gravity drop function drain pipe 128
It can be made to flow down to.

In the second embodiment configured as described above, when there are a plurality of supply pipes for supplying compressed air to the pneumatic equipment or when the supply pipes are arranged in a grid pattern, the flow rate of the drain is compared with the flow rate of the compressed air. Since it is extremely small, the amount of the drain pipe can be made smaller than the amount of the supply pipe, and the system cost can be reduced.

FIG. 3 is an explanatory diagram of the third embodiment of the present invention.

In FIG. 3, supply pipes 120, 121, 122, ... Are branched from the main supply pipe and are arranged substantially horizontally, and supply compressed air to a pneumatic device (not shown). A drain pipe 128 is arranged in parallel below the supply pipe 122. The drain pipe 128 has drain branch pipes 129a, 129b, ... Which are orthogonal to the pipe axis at a plurality of positions, and the drain branch pipes 129a, 129b, .. are connected to the connecting pipes 130a, 130b, 131a, 131b ,.
Supply pipes 120, 121, 122, ... Are connected via 132a, 132b and the like.

Also in this embodiment, as in the embodiment of FIG. 2, the amount of drain piping can be smaller than the amount of supply piping. Also, this embodiment is different from the embodiment shown in FIG.
Since it is composed of the horizontal pipe and the vertical pipe, the construction is easy and it is possible to easily avoid the interference with the lighting equipment and the lifting device provided on the ceiling.

FIG. 4 is an explanatory diagram of the fourth embodiment of the present invention.

In the fourth embodiment shown in FIG. 4, the main supply pipe 74 and the main drain pipe 90 are communicated with each other by the separator / distributor 140 (140a to 140n). This distribution pipe 140 is located at the upper distribution unit 1
It consists of 42 and the separator part 144 below it.

As shown in FIG. 5, the separator 144 has a structure in which a filter 148 is arranged at the center of a bottomed cylindrical casing 146. The casing 146 has a plurality of connection ports 15 in the lower portion and the upper portion (for example, four at 90 ° intervals from the center).
0 and 152 are formed so that the main drain pipe 90 can be connected to the lower connection port 150 via the joint 153 and the main supply pipe 70 to the upper connection port 152 via the joint 155 ( (See Fig. 4). Further, the casing 146 is formed with a screw portion 154 (which may be a flange type) for screwing the distribution portion 142 on the inner peripheral surface of the upper end portion, and a partition plate 156 is arranged below the screw portion 154. A step 158 is provided for this purpose.

The partition plate 156 serves as a packing while partitioning the separator part 144 and the distribution part 142, and is sandwiched between the lower end surface of the distribution part 142 screwed to the screw part 154 and the step part 158 of the casing 146, and this part. Prevents compressed air from leaking from. Further, the partition plate 156 has a donut shape having a central hole (not shown), and a truncated cone-shaped support 160 is fixed around the central hole on the lower surface. The support 160 has a hole formed in the center for inserting the filter 76, and the upper portion supports the inserted filter 148, and the main supply pipe 74
The compressed air flowing in from the inside is prevented from directly hitting the filter 148, and the compressed air is caused to collide with the casing inner wall portion 161 by a centrifugal separation action, so that the casing inner wall portion 1
Together with 61, it has the function of a drain separator that separates the drain in the compressed air.

On the other hand, the distributor 140n provided at the extreme end of the main supply pipe 74 and the main drain pipe 90 has a drain port 163 formed at the bottom of the separator 144 as shown by the broken line in FIG. , Through the fitting 162 to this drain port 163, the auto drain device 164
Can be connected. Therefore, the main supply pipe that is the upper supply pipe and the main drain pipe that is the drain supply pipe are connected to the compressed air supply source and the drain port, and form a loop to form an endless compressed air supply path. To do.

The distributor portion 142 has a hollow bowl shape, and the compressed air that has passed through the filter 148 flows in as shown by the arrow.
A plurality of outlets 166 for taking out this compressed air to the outside
As shown in FIG. 4, the coil unit 22, the work hose 26, or the terminal supply branch pipe 168 can be connected via a joint. The reference numeral 170 provided at the tip of the coil unit 22, the work hose 26, etc. is a so-called one-touch type socket for connecting a pneumatic device (a common joint may be used).

The above-mentioned filter 148 has rigidity that does not deform even when compressed air flows in and passes through, and is composed of a member that does not corrode, for example, a thin ribbon-shaped member made of stainless steel. Then, the filter 148 is formed so that the effective cross-sectional area is several ten times or more the cross-sectional area of the main supply pipe 74,
The pressure of the compressed air flowing out to the distributor 142 side is prevented from decreasing, and the contact area between the compressed air passing through the filter 148 and the element of the filter 148 is
Configured to be 1000 times the cross-sectional area of the main supply pipe 70,
Water, oil, dust, etc. in the compressed air can be reliably captured.

The operation of the fourth embodiment configured as described above is such that, for example, no pneumatic device is attached to the coil unit 22 connected to the separator / distributor 140a, and the pneumatic device 30 is connected to the work hose 26 connected to the distributor 140b. When installed and in use:

Compressed air from the compressor flows into the separator section 144 of the distributor 140a via the main supply pipe 74 and the main drain pipe 90. The compressed air that has flowed into the separator 144 from the main supply pipe 74 collides with the truncated cone-shaped support 160 and also hits the inner wall 161 by the centrifugal separation action, and a part of the water content and oil contained in the compressed air. Will be dropped as drain 172 on the bottom of the separator 144. However, since no pneumatic device is connected to the distributor 140a, the compressed air that has entered the separate part 144 from the main supply pipe 74 on the intake side (left side in FIG. 5) passes around the support 160 and is almost Directly flows to the main supply pipe 74 on the terminal side. Further, the compressed air that has flowed into the separator part 144 from the main drain pipe 90 on the intake side flows to the main drain pipe 90 on the terminal side as it is, and the drain 172 accumulated at the lower part of the separator 144 is connected to the main drain pipe 90 on the terminal side. Transport to.

On the other hand, since the pneumatic device 30 is attached to the distributor 142 of the distributor 140b via the work hose 26 and used, a part of the compressed air flowing into the separator 144 flows into the distributor 142. That is, a part of the compressed air flowing into the separator 144 via the main supply pipe 74 flows below the support 160 as shown by the arrow in FIG. Filter with department
Enter 148. At this time, the compressed air flowing downward along the support 160 is collided with the casing inner wall portion 161 by the centrifugal separation action because the support 160 has a truncated cone shape, and the compressed air is discharged in the same manner as on the surface of the support 160. ,
Part of the oil component is separated on the surface of the casing inner wall portion 161.

The compressed air that has entered the filter 148 moves upward while coming into contact with the elements of the filter 148, and flows into the distributor 142. At this time, the water content and the oil content in the compressed air repeatedly collide with the element of the filter 148 at a very low flow rate, are condensed on the surface of the element, and become the drain 172 and flow down below the separator section 144. Further, when the dust contained in the compressed air comes into contact with the element of the filter 148, it is captured by the drain 172 condensed in the element, and flows down below the separator portion 144 together with the drain 172.

Therefore, in the compressed air that has flowed into the distribution unit 142, most of the water content, the oil content, and the dust content are removed, and dust with a particle size of about 20 μm or more can be removed. Therefore, dry and compressed compressed air is supplied to the pneumatic equipment, and it is possible to prevent the drainage of the pneumatic equipment, the clogging of the pneumatic equipment, and the like. In addition, since the filter 148 of the embodiment is made of ribbon-shaped stainless steel, it does not corrode or crush the element due to compressed air to cause clogging, and does not require maintenance for a long period of time. It can be used and the operating cost can be reduced. Moreover, since the drain condensed by the filter 148 captures the dust, not only the main and line filters and separators that have been conventionally required, but also the water-cooled aftercooler, the refrigeration dryer and the general end filter are omitted. You can

Further, in the piping system provided with the separator / distributor 140 as in the present embodiment, even if each pipe is made of a steel pipe, the filter 148 of the distributor 140 causes rust or the like in the pipe. Therefore, no special end filter is required. Needless to say, various protective devices such as those shown in FIG. 7 are not required, and a simple separator cannot be used. However, since the separator / distributor 140 of this system has a filter 148 that does not clog, a filter clogging problem occurs. Can be solved semi-permanently with no maintenance. Therefore, it is possible to omit the back washing of the filter, which is required in the conventional system about once a month, and the maintenance is easy and the maintenance cost can be reduced.

The automatic drain device 164 automatically opens the discharge port when a predetermined amount of drain is accumulated in the device, ejects compressed air and discharges the drain to the outside. As a result, the drain 172 in the separator portion 144 of the distributor 140 is conveyed to the auto drain device 164 by the compressed air flowing in the main drain pipe 90 and automatically discharged to the outside, regardless of the season or temperature. No maintenance of the piping system is realized.

In the above embodiment, the case where the compressed gas is air has been described, but the compressed gas is not limited to air, and may be nitrogen gas, oxygen gas, fuel gas or the like.

〔The invention's effect〕

As described above, according to the compressed air supply piping system of the present invention, the compressed air supply source and the drain port are communicated with each other,
The upper supply pipe for guiding the compressed air to the pneumatic equipment and the lower part of the upper supply pipe are connected to the compressed air source and the drain port to form a loop in cooperation with the upper supply pipe. In addition to providing a drain-use supply pipe that guides the drainage mainly generated in the drain to the drain port, the equipment pipe connection part of the part supply pipe and the drain-use supply pipe are connected by a connecting member to connect to the upper supply pipe. Since the generated drain is automatically guided to the drain combined supply pipe by the self-weight drop function, and compressed air flowing through this pipe is automatically and centrally conveyed to the drain port, it is not necessary to manage many drains Prevents harmful effects such as draining from pneumatic equipment connected to the supply piping that does not spout from the end of the piping and adversely affects the operation of products and pneumatic equipment. Kill. Also, expensive protective equipment such as a water-cooled aftercooler, a main and line separator, a filter, and a refrigeration air dryer, which have conventionally treated drains in the main at the supply source, are unnecessary. The upper supply pipe and the drain-combined supply pipe are connected to the compressed air supply source and the drain port, and a loop is formed to form an endless compressed air supply path, thereby compressing even pneumatic equipment. Since compressed air can be supplied not only in one direction but also in multiple directions, a characteristic supply piping system that does not cause inconvenience in the operation of equipment can be obtained, and the amount of compressed air in the piping system can be increased. ,
Pressure fluctuation due to use of pneumatic equipment can be reduced.

Further, if a filter for removing liquid particles in the compressed air is provided in the connecting member, cleaner, dry compressed air can be taken out, and the effect can be further enhanced.

[Brief description of drawings]

FIG. 1 is an explanatory view of a compressed air supply piping system according to a first embodiment of the present invention, FIG. 2 is a perspective view schematically showing a part of the second embodiment, and FIG. 3 is a third embodiment. FIG. 4, FIG. 4 is an explanatory view of the fourth embodiment, FIG. 5 is a cross-sectional view of the separator / distributor used in the fourth embodiment, and FIG. 6 is an explanation showing an example of a conventional compressed gas supply piping system. FIG. 7 is an explanatory view of a compressed gas supply piping system using a conventional protective device. 10 …… Compressor (high pressure supply source), 30, 32 …… Air gun, 36 …… Drain cock (Drain port), 70 …… Supply pipe, 74 …… Main supply pipe, 82,84 …… Supply branch pipe, 90 ...... Main drain pipe, 96, 98 …… Drain branch pipe, 104, 106, 114, 1
40 …… Coupling member (Distributor that also serves as a connecting pipe, fitting, separator), 142 …… Distributor, 144 …… Separator, 148 ……
filter.

Claims (2)

[Claims] 1. An upper supply pipe for communicating compressed air supply source and a drain port to introduce compressed air to pneumatic equipment, and a compressed air source and a drain port located below the upper supply pipe. Connected to the upper supply pipe to form a loop, and also serves as a drain for supplying water mainly generated in the compressed air to a drain port, and a device pipe for connecting the air compressor. A connection between the passage and the upper supply pipe and the drain-use supply pipe are communicated with each other, and a drain mainly composed of water condensed in the upper supply pipe is guided to the drain-use supply pipe by a gravity falling function. A compressed air supply piping system comprising: a connecting member. 2. The compressed air supply piping system according to claim 1, wherein the connecting member has a filter that captures particles of the water and other liquids in the compressed air.