JP5838457B1 - Separator and compressed air circuit using the same - Google Patents

Abstract

Disclosed is a separator that can suppress pressure loss both on its own and on a circuit and that is advantageous in terms of cost, and a compressed pneumatic circuit using the same. A separator (1) includes an inner cylinder (2) and an outer cylinder (3), and has a double pipe in which at least one end of the inner cylinder (2) is disposed in the outer cylinder (3), and compressed air is An inlet 9 comprising a through-hole formed in a side surface on one end side of the outer cylinder, for separating or removing impurities from the compressed air by forming a flow channel; Impurities are discharged, the inflow channel 10 communicating, the outflow channel 11 separated from the inflow channel and the inner cylinder 2, the folded channel 13 communicating the inflow channel 10 and the outflow channel 11, and the like. A discharge port 17, a separation unit 14 for separating or removing the impurities from the compressed air, and an outflow port 12 communicating with the outflow channel 11 in a straight line. [Selection] Figure 1

Description

  The present invention relates to a separator for separating impurities contained in compressed air and a compressed pneumatic circuit using the separator.

  Compressed air discharged from an air compressor such as an air compressor contains impurities such as condensate drain and dust, or lubricating oil used in the air compressor. Compressed air is then used in pneumatic equipment such as air guns and cylinders, and if such impurities are included, there is a risk of failure of these pneumatic equipment. That is, if impurities are included, it may be harmful to future uses of compressed air. For this reason, impurities in the compressed air are separated or removed from the compressed air by a separator as appropriate (see, for example, Patent Document 1).

  A separator using centrifugal force as typified by Patent Document 1 forms a swirling flow by swirling compressed air containing impurities, and the impurities are blown outward by the centrifugal force generated at this time. It separates each other. Such a centrifuge has a low pressure loss because it does not use a net-like fiber material made of resin, paper, or hollow paper membrane for removing impurities. For this reason, the same flow rate of compressed air can be obtained even if the separator itself is downsized as compared with a separator using such a fiber material. Further, since the impurities are blown outward as described above, these impurities do not adhere to the swirl flow generating portion in the separator. For this reason, it is not necessary to replace the swirl flow generating section, and it can be used semi-permanently as a separator.

  However, in the separator of Patent Document 1, the inlet and outlet of compressed air are formed in the same axial direction. In such a configuration, the flow path of the compressed air that has flowed into the separator from the inlet becomes a swirl flow and then bends and descends, and then moves to the flow path that rises after removing impurities. It is necessary to bend to the outlet and from this to the outlet. That is, the flow path is bent approximately 90 ° four times. For this reason, the pressure loss at the time of this bending is large, the energy loss for compensating this becomes large, and the efficiency is poor. For example, in a 20A pipe, a resistance coefficient obtained by multiplying the resistance of a straight pipe 1 m that is not bent in a flow path bent by 90 ° by approximately 0.8 is applied. Therefore, if it bends four times, it must be multiplied by the resistance coefficient multiplied by 3.2. In order to form a flow path that bends 90 °, a pipe called an elbow having an approximately L shape in plan view is required. In order to form a flow path in the coaxial direction and a flow path that bends by 90 °, a pipe referred to as a substantially T-shaped cheese in plan view is required. This cheese is multiplied by a resistance factor of 1.4.

  Moreover, in the separator of patent document 1, since it is necessary to bend the flow path of compressed air in the 4th time and to make it face toward an outflow port, when the said part is formed with a casting, the cost for that is needed, and economical efficiency This is not preferable.

  Further, when the inlet and the outlet are formed in the same direction, when the separator is arranged in the compressed pneumatic circuit through which the compressed air flows, it cannot be directly arranged at the place where the pipe rises. Therefore, the above-mentioned elbow and cheese are required at the rising position, and the pressure loss is increased even when viewed as a whole compressed air circuit.

  In addition, when the compressed air circuit is an annular loop pipe, compressed air may flow in from the outlet side, so a separator must be provided on the loop pipe across the pneumatic equipment. In other words, the equipment becomes larger. If there is only one pneumatic device and one separator on the loop line, compressed air containing impurities may flow into the pneumatic device first, which is not preferable. Further passage of the compressed air through the separator thereafter causes the separator to generate only a pressure loss on the loop line.

JP-A-7-112145

  The present invention takes the above-described conventional technology into consideration, and provides a separator that can suppress pressure loss both on a single unit and on a circuit and that is advantageous in terms of cost, and a compressed pneumatic circuit using the same. With the goal.

  In order to achieve the above-mentioned object, in the present invention, there is provided a double pipe having an inner cylinder and an outer cylinder, at least one end of the inner cylinder being disposed in the outer cylinder, and a flow of compressed air. A separator for separating or removing impurities from the compressed air with a passage formed therein, an inlet comprising a through hole provided on a side surface on one end side of the outer cylinder, and the inlet An inflow channel that communicates with and extends through the double pipe, an outflow channel that is separated from the inflow channel and the inner cylinder, and extends through the double pipe, and the inflow channel and the outflow channel communicate with each other. A return flow path, a discharge port provided through the outer cylinder, through which the impurities are discharged, and formed in the inflow flow path, the return flow path, or the outflow flow path, and the impurities from the compressed air A separation unit for separating or removing It is formed by the mouth, to provide a separator which is characterized by comprising an outlet in communication with the outlet flow path and the straight line.

  Preferably, a plurality of the inflow ports are provided in the outer cylinder.

  Preferably, the inflow channel is formed between the inner cylinder and the outer cylinder and extends toward the other end portion of the outer cylinder, and the folded channel is formed on the downstream side of the inflow channel and the inner cylinder. One end of the cylinder communicates, the outflow channel communicates with the folded channel, and extends in the inner cylinder toward the other end of the inner cylinder. The discharge port is formed to open at the other end of the outer cylinder, and the separation unit is formed in the inflow channel to transfer the compressed air to the other end of the outer cylinder. In order to make a swirl flow in the inflow channel, it has blades formed in a spiral shape.

  Further, according to the present invention, there is provided a compressed pneumatic circuit having a pipeline through which compressed air discharged from an air compressor for compressing air flows, wherein the inlet is provided on an inlet side of a portion where the pipeline is bent vertically upward. Provides a compressed pneumatic circuit using the separator, wherein the outlet is arranged on the outlet side.

  Further, in the present invention, a compressed pneumatic circuit having a pipeline through which compressed air discharged from an air compressor for compressing air flows, the pipeline having a loop portion formed in an annular shape, A compressed pneumatic circuit using the separator is provided, wherein the inflow port is arranged on the inlet side of the portion where the loop portion is bent vertically upward, and the outflow port is arranged on the outlet side.

  According to the present invention, the portion where the flow path of the compressed air is bent is a portion from the inlet to the inflow passage, a portion from the inflow passage to the return passage, and the return passage from the return passage to the outflow passage. It becomes only the part directed. That is, there are only three places where the flow path of the compressed air is bent. That is, since the outflow channel and the outflow port communicate with each other in a straight line, the channel is not bent at this portion, and the number of times the channel is bent can be reduced as compared with the conventional separator. For this reason, since the pressure loss with respect to compressed air can be aimed at as a separator simple substance, it is energy efficient. Further, reducing the number of bent portions improves the productivity because the structure is simplified, and the manufacturing cost can be reduced correspondingly.

  In addition, since a plurality of inflow ports are provided, the separator can be applied to various shapes of pipes when the separator is arranged in a compressed pneumatic circuit including pipes through which compressed air flows. In particular, it can be arranged at a site where the pipeline flows from multiple directions.

  Also, by setting the inflow channel between the inner cylinder and the outer cylinder and the outflow channel in the inner cylinder, the inflow channel is formed in a spiral shape by forming a spirally formed blade on the outer side of the inner cylinder. It can be a flow path. For this reason, compressed air can be made into a swirl flow here, and an impurity can be efficiently separated or removed from compressed air using centrifugal force.

  Further, in the present invention, the separator can be used as an alternative to the elbow by arranging the separator according to the present invention at a portion bent vertically upward in the compressed air circuit, that is, a so-called rising portion. For this reason, the pressure loss at the elbow portion can be covered by the separator as compared with the conventional compression pneumatic circuit in which the separator and the elbow are separately provided. Furthermore, the elbows in the part can be reduced, and the cost efficiency is improved.

  Moreover, in this invention, the separator can be used as a substitute of cheese by arranging the separator which concerns on this invention in the part looped by the compression pneumatic circuit, what is called a loop part. Since the compressed air flows in from the high pressure side in the loop portion, it is unclear from which compressed air flows from the rising portion to which the pneumatic device is connected. For this reason, in the conventional loop part in which the separator and the cheese were separately arranged, if the separators were not arranged on both sides of the rising part, it did not play the meaning as a separator, but the separator as a cheese in the rising part Since the number of separators can be reduced, the number of separators can be reduced. Moreover, the pressure loss in the cheese portion can be covered with the separator as compared with the conventional compressed air circuit in which the cheese and the separator are separately provided.

The schematic sectional drawing of the separator which concerns on this invention. Schematic which shows an example of the pneumatic circuit using the separator which concerns on this invention. Schematic which shows what applied the separator concerning this invention to the loop part.

  The separator 1 according to the present invention is for separating or removing impurities from compressed air by forming a flow path through which the compressed air flows. That is, the separator 1 is a device for compressed air. As shown in FIG. 1, the separator 1 has a double tube structure including an inner cylinder 2 and an outer cylinder 3. The outer cylinder 3 is formed by cooperation of a head portion 4 and a body portion 5. The inner cylinder 2 is formed by cooperation of the head portion 4 and the guide cylinder 6. Therefore, the head portion 4 is formed with a through hole 7 communicating with the space in the inner cylinder 2 and a cavity 8 communicating with the space between the inner cylinder 2 and the outer cylinder 3.

  The end surface on the head portion 4 side, which is one end portion of the outer cylinder 3, is closed except for a portion where the through hole 7 is formed. The side surface on one end side of the outer cylinder 3, that is, the side surface of the head portion 4 opens to communicate with the cavity 8, and an inflow port 9 is formed. The inflow port 9 communicates with an inflow channel 10 which is a space formed between the inner cylinder 2 and the outer cylinder 3 in the double pipe structure described above. That is, the inflow channel 10 includes a space 8 and further includes a space between the body portion 5 and the guide cylinder 6. The inflow channel 10 has the inlet 9 side as an upstream side and extends in the direction of the other end of the outer cylinder 3 (the side opposite to the head portion 4 side).

  On the other hand, the inside of the guide tube 6, that is, the space separated by the inflow channel 10 and the inner tube 2 is formed as the outflow channel 11. That is, the outflow channel 11 extends in the direction of the other end (upper side in FIG. 1) with the one end portion (lower side in FIG. 1) of the inner cylinder 2 as the upstream side in the double pipe structure described above. . Here, one end of the inner cylinder 2 is located in the body portion 5, that is, the outer cylinder 3. A head portion 4 is disposed at the other end of the inner cylinder 2, and an opening for forming the above-described through hole 7 is formed as an outlet 12. In other words, the outlet 12 is formed to open at the other end of the inner cylinder 2.

  The inflow channel 10 and the outflow channel 11 communicate with each other through a folded channel 13. Specifically, the folded flow path 13 is formed in a portion that wraps around one end of the inner cylinder 2 (one end of the guide cylinder 6) from the outside to the inside. The upstream side of the flow path 11 is connected. In the example of FIG. 1, since the inner cylinder 2 and the outer cylinder 3 are cylindrical, the folded flow path 13 is formed in all circumferential directions (360 ° direction).

  A separation unit 14 is disposed in the inflow channel 10 described above. The separation unit 14 is for separating or removing impurities such as drainage and dust, which are condensed water in compressed air flowing in from the inlet 12, or lubricating oil used in the air compressor. Although this example shows an example in which the separation unit 14 is provided in the inflow channel 10, the separation unit 14 may be provided in the return channel 13 or the outflow channel 11 depending on the structure employed.

  The separation unit 14 has a spiral blade 15 provided on the outer periphery of the inner cylinder 2 in the outflow channel 10. Specifically, the separation unit 14 has a cylindrical body 16 having a substantially cylindrical shape (cylindrical shape in the example of FIG. 1), and the blades 15 are spirally formed on the outer side. As the compressed air passes through the spiral blade 15, the compressed air flows through the outer periphery of the inner cylinder 2 as a swirling flow. The cylindrical body 16 forms an outflow passage 11 in cooperation with the guide cylinder 6 and the through hole 7. The end surface on the other end side of the outer cylinder 3 is opened through to form a discharge port 17. The discharge port 17 is for discharging impurities separated or removed from the compressed air.

  The operation of the separator 1 will be described below. Compressed air discharged from an air compressor such as an air compressor first flows into the separator 1 from the inlet 9 (arrow A). The compressed air then passes through the inflow channel 10 and becomes a swirl flow by the blades 15 of the separation unit 14 (arrow D). While passing through the inflow channel 10 in a swirl flow, impurities heavier than air are blown out by the centrifugal force. It is efficient to separate or remove impurities using such a cyclone format. Most of the impurities fall along the inner wall of the body part 5 as they are. Impurities are discharged from the discharge port 17 and are appropriately collected by a drain trap (see FIG. 2). The compressed air from which impurities have been separated or removed to some extent passes through the return channel 13 (arrow B) and flows to the outflow channel 11 (arrow C). At this time, a linear lattice body 18 such as a wire mesh is disposed further inside the guide cylinder 6. Impurities adhere to the compressed air as it passes through the linear grid 18 and are further separated or removed. Impurities adhering to the linear grid 18 fall and are discharged from the discharge port 17. Then, the compressed air from which impurities are almost separated or removed flows out from the outlet 12 through the outflow passage 11 and flows into a device such as an air tank, a filter, or an air dryer, and then used for a pneumatic device.

  Here, the outflow channel 11 and the outflow port 12 communicate with each other in a straight line. That is, the outflow channel 11 is linear, the connecting portion between the guide cylinder 6 and the cylinder 16 is not bent, and the inside of the cylinder 16 and the through hole 7 are not bent. These all communicate in a straight line, so that the outflow channel 11 extends straight and is directly connected to the outflow port 12. For this reason, the portion where the flow path of the compressed air is bent is divided into a portion (arrow A) from the inlet 9 toward the inflow passage 10 and a portion (arrow B) from the inflow passage 10 toward the return flow passage 13. Then, only the part (arrow C) from the return channel 13 toward the outflow channel 11 is provided. That is, there are only three places where the flow path of the compressed air is bent. As described above, since the outflow channel 11 and the outflow port 12 communicate with each other in a straight line, the channel is not bent at this portion, and the number of times the channel is bent is reduced as compared with the conventional separator. Can do. For this reason, since it can aim at suppression of the pressure loss with respect to compressed air as separator 1 single-piece | unit, it is efficient in terms of energy. Further, reducing the number of bent portions improves the productivity because the structure is simplified, and the manufacturing cost can be reduced correspondingly. Moreover, since the outflow channel 11 extends vertically upward in a straight line, the distance over which the impurities are dropped by their own weight can be increased, so that the impurity separation or removal efficiency can also be improved.

  A plurality of inflow ports 9 may be provided on the side surface of the outer cylinder 3, that is, the head portion 4. Since the cavity 8 is separated from the through hole 7 and is formed in the circumferential direction in the head portion 4, a plurality of inflow ports 9 can be provided if formed so as to communicate with the cavity 8. By doing in this way, when the separator 1 is arranged in a compressed pneumatic circuit composed of a pipeline through which compressed air flows, it can be applied to various shapes of pipelines. In particular, it can be arranged at a site where the pipeline flows from multiple directions. For example, if it is arranged in the middle of the loop pipeline, it will flow in from two directions. If the provided inlet 9 is not necessary, it may be closed by a lid 19 which is a plug, for example. The number of the inlets 9 can be appropriately selected by the lid 19.

  As shown in FIG. 2, when the separator 1 is applied to the compressed air pressure circuit 20, the separator 1 is disposed in the middle of the pipeline. The example shown in FIG. 2 shows a compressed pneumatic circuit 20 from an air compressor (air compressor) 21 to an air tank 22. As shown in FIG. 2, when the air tank 22 is located higher than the air compressor 21, or when the introduction port 22a of the air tank 22 is located higher than the discharge port 21a of the air compressor 21, the pipe line is vertically upward. A part that bends to a point is required. The separator 1 can be arranged on the rising portion 23 which is such a part. That is, the compressed air from the air compressor 21 is introduced from the inlet 9 (the inlet 9 is arranged on the inlet side of the rising portion 23) and is discharged upward from the outlet 12 (the outlet side of the rising portion 23). As a result, the compressed air is bent vertically upward in the pipe and circulates. In this way, the separator 1 can be used as an alternative to the elbow. For this reason, the pressure loss at the elbow portion can be covered by the separator as compared with the conventional compression pneumatic circuit in which the separator and the elbow are separately provided. In other words, compared to the conventional compressed air circuit that requires a separator and an elbow, the elbow is not required and the pressure loss can be reduced accordingly. Furthermore, the reduction of elbows in the part also improves cost efficiency. As described above, impurities typified by moisture pass through a discharge pipe (for example, a drain pipe) 24 connected to the discharge port 17 and are collected by a drain trap 25.

  In the rising portion 23, the inflow pipe 31 that is a pipe connected to the inflow port 9 has a smaller diameter than the outflow pipe 32 that is a pipe connected to the outflow port 12. This is because the centrifugal force of the swirling flow in the inflow channel 10 is strengthened to remove impurities efficiently, so that the diameter of the inflow pipe 31 is reduced and the flow velocity is increased. Further, the diameter of the outflow pipe 32 is large in order to improve the efficiency of dropping impurities by their own weight by slowing the flow rate.

  The separator 1 is applicable even when the compressed pneumatic circuit 20 includes an annular loop portion 27 as shown in FIG. Such a loop portion 27 is often formed at the end of the compressed air circuit 20, and a pneumatic device such as an air gun 28 is disposed here. In order to introduce compressed air into the air gun 28, a rising portion 23 is also formed in the loop portion 27. Therefore, the separator 1 can be disposed also in the rising portion 23. In the case of the loop portion 27, the compressed air flows in from two directions. For this reason, although cheese is normally arrange | positioned at the standup | rising part 23, the separator 1 is used as an alternative of this cheese. Two inlets 9 of the separator 1 are formed in the case where the inlets 9 are arranged in the loop portion 27 flowing in from two directions. Since the compressed air flows in from the high pressure side in the loop portion 27, it is unclear from which compressed air flows from the rising portion 23 to which the air gun 28 is connected. For this reason, in the conventional loop part 27 in which the separator 1 and the cheese are separately arranged, the separator 1 is not effective unless the separators are arranged on both sides of the rising part 23. Since the separator 1 can be provided as cheese, the number of the separators 1 can be reduced. Moreover, the pressure loss in the cheese portion can be covered with the separator as compared with the conventional compressed air circuit in which the cheese and the separator 1 are separately provided. In other words, compared with the conventional loop part 27 which requires a separator and cheese, cheese is unnecessary and the pressure loss corresponding to that can be reduced.

  3 shows an example in which the loop portion 27 is formed above the air compressor 21, and thus a circuit in which the rising portion 23 for introduction into the loop portion 27 is also formed. Moreover, the example which used the normal cheese 29 and the elbow 30 is shown in the location where the pipe line branches and bends other than the site | part where a pipe line stands | starts up.

1: separator, 2: inner cylinder, 3: outer cylinder, 4: head part, 5: body part, 6: guide cylinder, 7: through hole, 8: cavity, 9: inlet, 10: inflow channel, 11: Outflow channel, 12: Outlet, 13: Folding channel, 14: Separation unit, 15: Blade, 16: Cylindrical body, 17: Discharge port, 18: Linear lattice body, 19: Lid (plug), 20: Compressed pneumatic circuit, 21: Air compressor (air compressor), 21a: Discharge port, 22: Air tank, 22a, introduction port, 22b: Discharge port, 23: Rising part, 24: Discharge pipe, 25: Drain trap 27: Loop part, 28: Air gun, 29: Cheese, 30: Elbow

Claims (4)

Connected to the compressed air circuit, consisting of an inner cylinder and an outer cylinder, at least one end of the inner cylinder having a double pipe disposed in the outer cylinder, forming a flow path through which compressed air flows A separator for separating or removing impurities such as condensed water, dust and oil from the compressed air,
In order to achieve alternative and pressure loss reduction and cheese of the compressed air circuit,
An inflow port formed of a through hole provided on a side surface on one end side of the outer cylinder;
An inflow channel communicating with the inflow port and extending through the double pipe;
An outflow channel that is separated from the inflow channel by the inner cylinder and extends through the double pipe;
A folded channel that communicates the inflow channel and the outflow channel;
An exhaust port provided through the outer cylinder and from which the impurities are discharged;
A separation unit having a spiral blade and formed in the inflow channel or the return channel or the outflow channel, for separating or removing the impurities from the compressed air;
An outlet opening formed on the downstream side of the outflow channel, and in communication with the outflow channel in a straight line,
The said inlet is provided in the side which opposes the horizontal direction of the said outer cylinder, respectively in order to substitute for cheese, The separator characterized by the above-mentioned . An inflow channel is formed between the inner cylinder and the outer cylinder and extends in the direction of the other end of the outer cylinder,
The folded channel communicates the downstream side of the inflow channel and one end of the inner cylinder,
The outflow channel communicates with the folded channel and extends in the inner cylinder toward the other end of the inner cylinder;
The outlet is formed to open at the other end of the inner cylinder,
The discharge port is formed to open at the other end of the outer cylinder,
2. The separator according to claim 1, wherein the separation unit is disposed in the inflow channel and causes the compressed air to swirl in the inflow channel. A compressed pneumatic circuit having a conduit through which compressed air discharged from an air compressor for compressing air flows,
The compressed pneumatic circuit using a separator according to claim 1 or 2, wherein the inlet is disposed on an inlet side of the portion where the pipe is bent vertically upward, and the outlet is disposed on an outlet side. . A compressed pneumatic circuit having a conduit through which compressed air discharged from an air compressor for compressing air flows,
The pipe has a loop portion formed in an annular shape,
The compressed pneumatic circuit using the separator according to claim 1 or 2, wherein the inflow port is disposed on an inlet side of the portion where the loop portion is bent vertically upward, and the outflow port is disposed on an outlet side. .

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